JP2022091507A - Storage tank - Google Patents

Abstract

To provide a storage tank capable of inhibiting deceleration of initial drainage rate when a siphon is not yet started while temporarily storing a liquid, so as to prevent a time delay when generating siphon force, as well as, eliminating the need to store a large quantity of drainage for raising a water head of a siphon drainage pipe.SOLUTION: A storage tank 10 includes: a main flow channel 12 provided between an inflow port 22 into which a liquid flows and an outflow port 24 from which the liquid flows out; a pair of storage sections 14 provided beside the main flow channel 12, interposing the main flow channel 12, each communicating with the main flow channel 12, and is capable of storing the liquid; and a pair of partition walls 16 provided between the main flow channel 12 and the pair of storage sections 14 and extending along the flow of liquid inside the main flow channel 12, wherein, when an area of a region formed by a virtual line connecting highest positions on both sides of the main flow channel 12, and a contour of an inner wall surface of the main flow channel 12 is set as a flow channel cross-section area of the partition wall 16, the flow channel cross-section area at a position PB on an end on the outflow port 24 side is smaller than that at a position PA on an end on the inflow port 22 side.SELECTED DRAWING: Figure 5

Description

The present invention relates to a storage tank.

As a drainage system for apartment houses and the like, a siphon drainage system using the principle of siphon is known. According to the siphon drainage system, when draining water from a water supply device, the siphon force generated in the siphon drainage pipe can promote the drainage. On the other hand, in the siphon drainage system, it is assumed that a large amount of liquid is drained at one time. Therefore, it is necessary to provide a storage tank upstream of the siphon drainage pipe, which can temporarily store the liquid until the siphon force for promoting drainage starts to be generated.

As a storage tank, for example, Patent Document 1 discloses a storage tank including an inlet, an outlet, and a peripheral wall. The inside of the storage tank of Patent Document 1 can store liquid (drainage) side by side in a central region extending with a certain length between an inlet and an outlet by a peripheral wall and on both sides of the central region. It is divided into storage areas. According to Patent Document 1, the outlet portion of the peripheral wall protrudes downstream from the portion adjacent to the outlet portion, so that the liquid can be easily collected in the vicinity of the outlet.

Japanese Unexamined Patent Publication No. 2019-199682

However, in the case of Patent Document 1, since the central region and the storage regions on both sides are not separated inside the storage tank, the liquid flowing in from the inflow port overflows beyond the bank portion of the recess in the central region. , Can be moved to the storage areas on both sides without limitation. Therefore, when the storage tank of Patent Document 1 is applied to the siphon drainage system, the drainage that has flowed into the inside of the storage tank from the inlet may be scattered over a wide range from the central region to the storage region while going to the outlet. .. As a result, when the liquid is discharged from the storage tank, it is difficult for the water level near the outlet to rise inside the storage tank, so it is difficult to increase the head pressure of the siphon drainage pipe connected to the storage tank. ..

When the water head pressure of the siphon drainage pipe is low, it becomes difficult to increase the initial drainage speed of the liquid filling the pipe downstream from the storage tank, especially at the time of initial drainage when the siphon is not started. For this reason, there is a problem that the time until the siphon force is generated is delayed, and the amount of liquid temporarily required to increase the head pressure of the siphon drainage pipe (that is, the capacity of the storage tank) increases.

The present invention has been made by paying attention to the above-mentioned problem, and can suppress the decrease of the initial drainage speed when the siphon is not started while temporarily storing the liquid, and delay the time until the siphon force is generated. It is an object of the present invention to provide a storage tank that does not need to store a large amount of drainage in order to increase the head pressure of the siphon drainage pipe.

The storage tank according to the first aspect of the present invention is arranged side by side with the main flow path provided between the inflow port where the liquid flows in and the outflow port where the liquid flows out, and the main flow path sandwiched by the side of the main flow path. A pair of storage sections that communicate with each other and can store liquid, and a pair of partition walls that are provided between the main flow path and the pair of storage sections and extend along the flow of liquid in the main flow path. , The area of the area formed by the virtual line connecting the highest positions on both sides of the main flow path and the contour of the inner wall surface of the main flow path in the cross section cut at the plane orthogonal to the central axis of the main flow path is cut off. When set as an area, a partition wall in which the flow path cross-sectional area at the position of the end on the outlet side is smaller than the flow path cross-sectional area at the position of the end on the inflow port side is provided.

In the storage tank according to the first aspect, since the partition wall extending along the flow of the liquid in the main flow path is provided between the main flow path and the storage portion, the liquid flows around the main flow path. In other words, in the area where the partition wall is provided, the liquid is prevented from spreading from the main flow path to the reservoir unless the liquid gets over the partition wall. In addition, in the cross section cut along the plane orthogonal to the central axis of the main flow path, the area of the area formed by the virtual line connecting the highest positions on both sides of the main flow path and the contour of the inner wall surface of the main flow path is the flow path. When set as the cross-sectional area, the flow path cross-sectional area at the position of the end on the outlet side is smaller than the flow path cross-sectional area at the position of the end on the inflow port side.

Therefore, for example, when a liquid having a constant flow rate flows through the main flow path, the flow velocity of the liquid at the position of the end on the outlet side of the storage tank is higher than the flow velocity of the liquid at the position of the end on the inlet side. As a result, the flow velocity of the liquid discharged to the outside from the outlet can be increased. Therefore, when the storage tank according to the first aspect is applied to the siphon drainage system, it is possible to suppress the attenuation of the initial drainage rate of the liquid filling the pipe downstream from the storage tank while temporarily storing the liquid. Therefore, it is possible to prevent a delay in the time until the siphon force is generated, and it is possible to prevent a temporary increase in the amount of liquid to be stored.

In the second aspect of the present invention, the cross-sectional area of the flow path gradually decreases from the position of the end portion on the inlet side to the position of the end portion on the outlet side.

In the second aspect, since the cross-sectional area of the flow path gradually decreases from the position of the end on the inlet side toward the position of the end on the outlet side, the position of the end on the inlet side and the outlet side It is easier to manufacture a storage tank than in the case where a bulge, a step, or the like is formed between the position and the position of the end portion of the tank.

In the third aspect of the present invention, the reservoir partially communicates with the main flow path at a position near the outlet.

In the third aspect, since the reservoir partially communicates with the main flow path at a position near the outlet, the reservoir extends from the main channel to the lateral reservoir at a position other than near the outlet of the partition wall. The flow of the liquid is suppressed and the movement of the liquid to the reservoir is limited only at the opening. Therefore, when the liquid is discharged from the storage tank, the water level in the vicinity of the outlet tends to rise inside the storage tank. As a result, the head pressure of the liquid at the position near the outlet can be secured higher than that in the case where the partition wall is not provided.

In the fourth aspect of the present invention, the partition wall is continuously provided on the inner wall surface of the storage tank on the inlet side.

In the fourth aspect, since the partition wall is continuously provided on the inner wall surface of the storage tank on the inflow port side, the effect of preventing the liquid from spreading from the main flow path to the storage portion is enhanced on the inflow port side. Can be done.

According to the present invention, it is possible to suppress the decrease in the initial drainage speed when the siphon is not started, prevent the delay in the time until the siphon force is generated, and store a large amount of drainage in order to increase the head pressure of the siphon drainage pipe. It is possible to provide a storage tank that does not need to be used.

It is a perspective view explaining the structure of the storage tank which concerns on embodiment of this invention by cutting in the vertical plane which includes the central axis C in FIG. 2 and is orthogonal to a horizontal plane. It is a top view explaining the structure of the storage tank which concerns on this embodiment. 3 is a sectional view taken along line 3-3 in FIG. It is a perspective view explaining the structure of the storage tank which concerns on embodiment of this invention by cutting in the horizontal plane including line 5-5 in FIG. 5 is a sectional view taken along line 5-5 in FIG. It is a cross-sectional view taken along line 6-6 in FIG. 5, and is an enlarged view explaining the periphery of the position of the end portion on the inlet side of the main flow path. It is a cross-sectional view taken along line 7-7 in FIG. 5, and is an enlarged view explaining the periphery of the position of the end portion on the outlet side of the main flow path. 8-8 is a sectional view taken along line 8-8 in FIG. It is a side view explaining the siphon drainage system to which the storage tank which concerns on this embodiment is applied by cutting a part.

This embodiment will be described below. In the description of the drawings below, the same parts and similar parts are designated by the same reference numerals or similar reference numerals. However, the drawings are schematic, and the relationship between the thickness and the plane dimensions, the ratio of the thickness of each device and each member, etc. are different from the actual ones. Therefore, the specific thickness and dimensions should be determined in consideration of the following explanation. In addition, there are parts where the relationships and ratios of the dimensions of the drawings are different from each other.

<Structure of storage tank>
As shown in FIG. 1, the storage tank 10 according to the present embodiment includes a peripheral wall 10A which is a main body. As shown in FIGS. 1 and 2, the overall shape of the peripheral wall 10A is a rectangular parallelepiped shape. The peripheral wall 10A is integrally molded with, for example, a resin. As shown in FIG. 1, the inside of the peripheral wall 10A is divided into a main flow path 12, a storage portion 14, a partition wall 16 separating the main flow path 12 and the storage portion 14, and a branch flow path 18.

The main flow path 12 is provided between the inflow port 22 where the liquid flows in and the outflow port 24 where the liquid flows out, and extends along the central axis C in FIG. In the present embodiment, the shapes of the inlet 22 and the outlet 24 are cylindrical, and the cross-sectional shape is circular. The central axis C is parallel to the central axes of the respective cylinders of the inlet 22 and the outlet 24. Further, in the present embodiment, the inner diameter of the inlet 22 is about 50 mm, and the inner diameter of the outlet 24 is about 30 mm.

In the present invention, the shapes of the inlet 22 and the outlet 24 may be other shapes such as a square cylinder. Further, the inner diameters of the inlet 22 and the outlet 24 can be changed as appropriate.

The storage unit 14 is juxtaposed with the main flow path 12 on the side of the main flow path 12, and a certain amount of liquid can be stored in the storage unit 14. As shown in FIG. 3, in the present embodiment, the bottom of the main flow path 12 of the storage tank 10 is placed on a horizontal plane, and the ceiling of the storage tank 10 is arranged horizontally in the main flow path 12. The bottom surface is lower than the bottom surface of the storage unit 14. In other words, the main flow path 12 is deeper than the storage section 14.

As shown in FIG. 4, in the present embodiment, a pair of storage portions 14 are provided on the left and right sides of the central axis C of the main flow path 12 so as to communicate with the main flow path 12 with the main flow path 12 interposed therebetween. In the present invention, the number of storage portions is not limited to two, and may be, for example, one or three or more.

A pair of partition walls 16 are provided between the main flow path 12 and the respective storage portions 14, and extend along the direction of the liquid flow in the main flow path 12 from the upper side to the lower side in FIG. The partition wall 16 divides the main flow path 12 and the storage portion 14. As shown in FIG. 1, the height of the partition wall 16 is higher than the height of the ceiling portion of the outlet 24. In the present embodiment, as shown in FIG. 3, the partition wall 16 is formed by projecting the region of the bottom of the peripheral wall 10A located on the left and right of the inflow port 22 upward. Therefore, the amount of the resin used as the material of the peripheral wall 10A can be reduced.

Further, as shown in FIG. 4, the partition wall 16 is continuously provided on the inner wall surface of the peripheral wall 10A of the storage tank 10 on the inflow port 22 side. In other words, the end portion of the partition wall 16 on the inflow port 22 side is in contact with the portion of the peripheral wall 10A in the vicinity of the inflow port 22. Therefore, at the end of the partition wall 16 on the inflow port 22 side, no gap is formed between the main flow path 12 and the storage portion 14.

In the present embodiment, as shown in FIG. 1, a gap is formed between the partition wall 16 and the ceiling portion of the peripheral wall 10A. In the present invention, the space between the partition wall and the ceiling portion of the peripheral wall may be closed. Further, the partition wall 16 is partially formed as a notch at a position near the outlet 24 (lower left position in FIG. 1), and has an opening 26 for communicating the main flow path side and the storage portion side. That is, the opening 26 forms a gap between the outlet 24 and the partition wall 16 in the extending direction of the central axis C for the liquid to branch from the main flow path 12 and flow.

In other words, the reservoir 14 partially communicates with the main flow path 12 at a position near the outlet 24. Further, the partition wall 16 guides the flow of the liquid so as to prevent the liquid in the main flow path 12 from flowing out to the storage portion 14 side until the liquid reaches the position of the opening 26.

In the present embodiment, the shape of the opening 26 is rectangular, but the present invention is not limited to this, and any geometric shape such as another polygonal shape or a circular shape can be adopted. Further, the opening is not limited to the notch, and may be, for example, a through hole formed in the partition wall 16.

As shown in FIG. 5, the branch flow path 18 connects the opening 26 and the storage portion 14. The branch flow path 18 communicates with the storage portion 14 at a position on the inflow port 22 side (upper side in FIG. 5) from the opening 26 in FIG.

As shown in FIG. 3, the main flow path 12 is a region surrounded by a recess 13 having an inner surface having a semicircular cross-sectional shape and a pair of partition walls 16 arranged on both sides of the recess 13. In the position where the partition wall 16 does not exist due to the opening 26 formed inside the peripheral wall 10A, the main flow path 12 is formed only by the recess 13.

In the present embodiment, it is formed by a virtual line connecting the highest positions on both sides of the main flow path 12 in a cross section cut along a plane orthogonal to the central axis C of the main flow path 12 and an outline of the inner wall surface of the main flow path 12. The area of the area to be formed is set as the cross-sectional area of the flow path.

Specifically, in FIG. 6, at the position PA of the end portion on the inflow port 22 side, the virtual line 26A connecting the tops of the partition walls 16 on both sides of the main flow path 12 and the contour of the inner wall surface of the main flow path 12 are formed. The flow path cross-sectional area SA of the region to be formed is illustrated with a dotted pattern. Further, in FIG. 7, at the position PB of the end portion on the outlet 24 side, the virtual line 26B connecting the inner surfaces of the bottom portions of the peripheral wall 10A on both sides of the recess 13 and the contour of the inner wall surface of the main flow path 12 are formed. The channel cross-sectional area SB of the region to be formed is illustrated with a dotted pattern.

In this embodiment, since no gap is formed between the inflow port 22 and the partition wall 16, the highest position on both sides of the recess 13 in the position PA of the end portion of the main flow path 12 on the inflow port 22 side is It was the top of the partition wall 16. However, the present invention is not limited to this. When a gap is formed between the inflow port and the partition wall, the highest position on both sides of the recess at the position of the end portion on the inflow port side of the main flow path is the end portion on the outflow port 24 side in the present embodiment. As in the case of position PB, it can be the inner surface of the bottom portion of the peripheral wall 10A.

As shown in FIGS. 6 and 7, in the present embodiment, the flow path cross-sectional area SB of the end position PB on the outlet 24 side is from the flow path cross-section SA of the end position PA on the inflow port 22 side. small. Further, in the present embodiment, the cross-sectional area of the flow path gradually decreases from the position PA of the end portion on the inflow port 22 side toward the position PB of the end portion on the outflow port 24 side.

In the present invention, it is not essential that the cross-sectional area of the main flow path gradually decreases from the inflow port 22 toward the outflow port 24. For example, between the inflow port 22 and the outflow port 24, a region having a cross-sectional area larger than the cross-sectional area of the end on the inflow port 22 side of the main flow path is partially formed by the partition wall partially bulging outward. It may be provided. Alternatively, for example, the outer edge of the main flow path may be formed in a stepped shape or a stepped shape in a plan view. The bulge of the partition wall is set within a range in which the flow rate of the required liquid inside the storage tank 10 is realized.

<How to use the storage tank>
Next, a method of using the storage tank will be described using the siphon drainage system to which the storage tank according to the present embodiment is applied. First, the siphon drainage system is a drainage system that utilizes the siphon principle. According to the siphon drainage system, when draining water from a water supply device, the siphon force generated in the siphon drainage pipe can promote the drainage. The siphon drainage system can be adopted, for example, as a drainage system in an apartment house in which one building is divided into a plurality of floors.

As shown in FIG. 9, the siphon drainage system 100 to which the storage tank 10 according to the present embodiment is applied includes a water supply device 110, a device drainage pipe 120, and a storage tank 10 according to an embodiment of the present invention. A siphon drainage pipe 130 is provided. The siphon drainage system 100 is installed in an apartment house in which the building is divided into a plurality of floors.

In the siphon drainage system 100, assuming that a large amount of liquid is drained from the water supply device 110 at one time, the storage tank 10 according to the present embodiment is provided between the device drainage pipe 120 and the siphon drainage pipe 130. Has been done. The storage tank 10 can temporarily store a large amount of water drained from the water supply device 110 at one time until the promotion of drainage (generation of siphon force) is started.

The water supply device 110 is arranged on each floor of the building. Examples of the water supply device 110 include a bathtub (for example, a unit bath), a washbasin, and a sink. In the present embodiment, the water supply device 110 is a bathtub.

The equipment drainage pipe 120 connects the water supply equipment 110 and the storage tank 10. The fixture drainage pipe 120 is arranged in the underfloor space S. The underfloor space S is a space formed between the floor member 101 and the floor slab 102 of the building. The instrument drain pipe 120 is composed of an upstream side portion 120A extending in the vertical direction (vertical direction) in FIG. 9 and a downstream side portion 120B extending in the horizontal direction (horizontal direction) in FIG. ..

The upstream portion 120A is connected to the water supply device 110. The downstream side portion 120B is connected to the upstream side portion 120A. The downstream side portion 120B is inclined downward from the upstream side portion 120A toward the downstream side. The downstream portion 120B is connected to the storage tank 10. A drain trap 121 is interposed in the middle of the downstream portion 120B.

The siphon drainage pipe 130 connects the storage tank 10 and the vertical pipe 150. The vertical pipe 150 is a drainage pipe that penetrates each floor of the building in the vertical direction. The siphon drainage pipe 130 is composed of a horizontal pulling pipe 130A arranged in the underfloor space S and a vertical pipe 130B penetrating the floor slab 102 and hanging downward.

The horizontal pull pipe 130A is connected to the storage tank 10. Further, the horizontal pulling pipe 130A extends in the lateral direction so as to have a substantially horizontal slopelessness. Specifically, it is piped along the floor slab 102 on the floor where the water supply device 110 is installed with a substantially horizontal slope.

The vertical pipe 130B is connected to the horizontal pulling pipe 130A. Further, the vertical pipe 130B is connected to the vertical pipe 150 via a pipe joint 140. Specifically, the vertical pipe 130B extends substantially vertically downward of the horizontal pulling pipe 130A to form a droop and generate a siphon force (for example, negative pressure).

In the siphon drainage system 100 of the present embodiment, first, the liquid is discharged from the water supply device 110 by the height difference H1 between the outlet of the water supply device 110 and the horizontal pulling pipe 130A of the siphon drainage pipe 130. The liquid (for example, water) flowing out of the water supply device 110 flows into the storage tank 10 from the device drain pipe 120 due to the weight of the liquid (that is, the drop pushing pressure).

As shown in FIG. 8, the liquid flowing into the storage tank 10 from the inflow port 22 flows toward the outflow port 24. Inside the storage tank 10, a part of the liquid is discharged to the outside from the outlet 24, and the remaining part is accumulated in the vicinity of the outlet 24, so that the water level in the vicinity of the outlet 24 rises.

Then, when the water level of the accumulated liquid exceeds the lower edge of the opening 26 by continuing the inflow of the liquid from the inflow port 22 into the storage tank 10, a part of the accumulated liquid is discharged from the main flow path 12. It branches and flows into the branch flow path 18. Further, when the water level of the liquid inside the storage tank 10 rises, the liquid flows from the branch flow path 18 into the storage unit 14, and the liquid flows into the storage unit 14 according to the volume of the storage unit 14 and the inflow rate of the liquid from the inflow port 22. A certain amount of liquid is stored inside the 10. Further, from the storage tank 10, the remaining liquid other than the stored liquid is discharged from the outlet 24 to the siphon drain pipe 130.

In the present embodiment, the siphon drainage pipe 130 forms a siphon drainage channel that generates a suction force by the siphon force. In the siphon drainage channel, the siphon force generated in the siphon drainage pipe 130 can promote the drainage of the liquid from the siphon drainage pipe 130.

In the siphon drainage channel of the present embodiment, the height difference H1 between the outlet of the water supply device 110 and the horizontal pulling pipe 130A of the siphon drainage pipe 130 causes the drop pushing pressure of the drainage from the water supply device 110 to cause the device drainage pipe 120 and the device drainage pipe 120. The horizontal pulling pipe 130A of the siphon drainage pipe 130 is filled with water. Due to the filling of the horizontal pulling pipe 130A of the siphon drainage pipe 130, the drainage that has reached the vertical pipe 130B of the siphon drainage pipe 130 having a hanging length H2 starts to fall in the vertical pipe 130B.

Then, on the upstream side of the vertical pipe 130B, the siphon action occurs when the horizontal pulling pipe 130A of the siphon drainage pipe 130 becomes full due to drainage. Using the generated siphon action as drainage power, a high-speed flow is generated in the siphon drainage channel. The generated high-speed flow causes drainage from the water supply device 110. Therefore, the drainage is smoothly and promptly discharged to the inside of the pipe joint 140.

In the present embodiment, since the siphon drainage system 100 is adopted as the siphon drainage system, the inside of the drainage pipe is filled with full-flow drainage. If the siphon drainage system 100 is adopted as the drainage system in this way, the drainage of the liquid becomes full-flow drainage, so that it is possible to prevent solid matter from adhering to the inside of the pipe and to use a small-diameter pipe.

Further, in the present embodiment, since the siphon drainage system 100 is adopted as the drainage system, the drainage pipe can be arranged without a gradient. Since the drainage pipe can be arranged without a slope, the height of the space under the floor where the drainage pipe is arranged can be lowered. Further, in the present embodiment, since the siphon drainage system 100 is adopted as the drainage system, the extension distance from the drainage source (for example, various water-related appliances 110) to the vertical pipe 150 can be lengthened. The extension distance is, for example, the horizontal length L from the outlet of the water supply device 110 to the vertical pipe 130B of the siphon drainage pipe 130. In addition, by being able to extend the extension distance, it is possible to increase the degree of freedom in the layout of the living room.

(Action effect)
In the storage tank 10 according to the present embodiment, a partition wall 16 extending along the flow of the liquid in the main flow path 12 is provided by separating the main flow path 12 and the storage portion 14. Therefore, the liquid flows around the main flow path 12. In other words, in the region where the partition wall 16 is provided, the liquid is prevented from spreading from the main flow path 12 to the storage portion 14 unless the liquid gets over the partition wall 16.

Further, an opening 26 is partially formed in the partition wall 16 at a position near the outlet 24, and the opening 26 and the storage portion 14 are connected by a branch flow path 18. That is, the storage unit 14 partially communicates with the main flow path 12 at a position near the outlet 24. Therefore, at a position other than the vicinity of the outlet 24 of the partition wall 16, the flow of the liquid spreading from the main flow path 12 to the lateral storage portion 14 is suppressed, and the movement of the liquid to the storage portion 14 is prevented by the opening 26. Only in a limited way. In other words, the liquid in the main flow path 12 branches at a position near the outlet 24, and only a part of the branched liquid moves to the storage section 14 via the opening 26 and the branch flow path 18. It is stored.

Therefore, when the liquid is discharged from the storage tank 10, the water level in the vicinity of the outlet 24 tends to rise inside the storage tank 10. As a result, the head pressure of the liquid at the position near the outlet 24 can be secured higher than that in the case where the partition wall 16 is not provided.

Further, in the storage tank 10 according to the present embodiment, since the bottom surface of the main flow path 12 is lower than the bottom surface of the storage unit 14, the flow of liquid from the main flow path 12 to the storage unit 14 is suppressed. Therefore, the head pressure of the liquid at a position near the outlet 24 can be further increased.

Further, in the storage tank 10 according to the present embodiment, the branch flow path 18 communicates with the storage unit 14 at a position on the inflow port 22 side from the opening 26. Therefore, when a part of the liquid in the main flow path 12 branches at a position near the outlet 24 and flows in the branch flow path 18 toward the storage unit 14, the direction of the flow in the branch flow path 18 is changed. , The direction of the flow in the main flow path 12 is changed to the opposite direction. The conversion in the opposite direction reduces the momentum of the liquid flow toward the reservoir 14, so that the liquid tends to collect at a position near the outlet 24. As a result, the head pressure of the liquid at a position near the outlet 24 can be further increased.

Further, in the storage tank 10 according to the present embodiment, in the cross section cut along the plane orthogonal to the central axis C of the main flow path 12, the virtual line connecting the highest positions on both sides of the main flow path 12 and the main flow path 12 are included. The area of the region formed by the contour of the wall surface is set as the cross-sectional area of the flow path. Further, in the main flow path 12, the flow path cross-sectional area SB of the end position PB on the outflow port 24 side is smaller than the flow path cross-section SA of the end position PA on the inflow port 22 side.

Therefore, for example, when a liquid having a constant flow rate flows through the main flow path 12, the flow velocity of the liquid at the position PB at the end on the outlet 24 side is faster than the flow rate of the liquid at the position PA at the end on the inlet 22 side. .. As a result, the flow velocity of the liquid discharged to the outside from the outlet 24 can be increased.

Further, in the storage tank 10 according to the present embodiment, the cross-sectional area of the flow path gradually decreases from the position PA of the end portion on the inflow port 22 side toward the position PB of the end portion on the outflow port 24 side. Therefore, it is easier to manufacture the storage tank 10 as compared with the case where a bulge, a step, or the like is formed between the position PA of the end portion on the inflow port 22 side and the position PB of the end portion on the outflow port 24 side.

Therefore, when the storage tank 10 according to the present embodiment is applied to the siphon drainage system 100, the initial drainage of the liquid that fills the piping downstream from the storage tank 10 while temporarily storing a certain amount of liquid in the storage tank 10. It is possible to suppress the attenuation of speed. Therefore, it is possible to prevent a delay in the time until the siphon force is generated, and it is possible to prevent a temporary increase in the amount of liquid to be stored.

Further, in the storage tank 10 according to the present embodiment, the partition wall 16 is continuously provided on the inner wall surface of the storage tank 10 on the inflow port 22 side. Therefore, the effect of preventing the liquid from spreading from the main flow path 12 to the storage portion 14 can be enhanced on the inflow port 22 side.

<Other embodiments>
Although the present invention has been described by the disclosed embodiments described above, the statements and drawings that form part of this disclosure should not be understood as limiting the invention. It should be considered from this disclosure to those skilled in the art that various alternative embodiments, examples and operational techniques will be apparent.

For example, in the present embodiment, the overall shape of the peripheral wall 10A is a rectangular parallelepiped shape, but the present invention is not limited to this. For example, the overall shape of the peripheral wall may be a columnar shape in which the inlet and outlet are arranged on the same straight line on the side surface. As long as the flow of liquid spreading from the main flow path to the lateral reservoir is suppressed at a position other than near the outlet of the partition wall, and the movement of the liquid to the reservoir is limited only at the opening, the peripheral wall The overall shape can be changed as appropriate. Further, the liquid is not limited to wastewater, and any liquid can be adopted.

As described above, the present invention includes various embodiments not described above, and the technical scope of the present invention is defined only by the matters specifying the invention within the scope of claims reasonable from the above description. Is.

10 storage tank, 10A peripheral wall, 12 main flow path, 13 recess, 14 storage part, 16 partition wall,
18 branch flow path, 22 inlet, 24 outlet, 26 opening,
26A, 26B virtual line, PA inlet side end position, PB outlet side end position,
SA, SB flow path cross section

Claims (4)

The main flow path provided between the inflow port where the liquid flows in and the outflow port where the liquid flows out,
A pair of storage units that are juxtaposed on the side of the main flow path with the main flow path interposed therebetween and can communicate with the main flow path to store the liquid.
A pair of partition walls provided between the main flow path and the pair of storage portions and extending along the flow of the liquid in the main flow path, and a cross section cut along a plane orthogonal to the central axis of the main flow path. Among them, when the area of the region formed by the virtual line connecting the highest positions on both sides of the main flow path and the contour of the inner wall surface of the main flow path is set as the flow path cross-sectional area, the end on the outlet side. With the partition wall, the flow path cross-sectional area at the position of the portion is smaller than the flow path cross-sectional area at the end position on the inflow port side.
A storage tank equipped with. The cross-sectional area of the flow path gradually decreases from the position of the end portion on the inflow port side toward the position of the end portion on the outlet side.
The storage tank according to claim 1. The reservoir partially communicates with the main flow path at a position near the outlet.
The storage tank according to claim 1 or 2. The partition wall is continuously provided on the inner wall surface of the storage tank on the inlet side.
The storage tank according to any one of claims 1 to 3.

Images