JP6971128B2 - Storage tank - Google Patents

Description

The present invention relates to a storage tank.

As a drainage system for an apartment house or the like, there is a system called a siphon drainage system that promotes drainage by using the principle of siphon. In the siphon drainage system, when a large amount of drainage is discharged from a water-related device such as a bathtub at one time, it is necessary to provide a storage tank for temporarily storing liquid until the promotion of drainage is started. As such a storage tank, a flow path reduction portion is provided between the outlet of the storage tank and the storage tank main body, and an inner wall surface that bulges outward is provided in a part of the flow path reduction portion. (See, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2016-108749

According to the above-mentioned storage tank, the liquid that has flowed into the storage tank and has not flowed out from the vicinity of the outlet is guided along the inner wall surface in a direction separated from the outlet. Thereby, according to the above-mentioned storage tank, it is possible to facilitate the outflow of the liquid from the storage tank without hindering the outflow of the liquid from the outlet of the storage tank.

However, the storage tank has a cylindrical storage tank main body. Therefore, in the case of the condition that more liquid flows into the storage tank, for example, the distance from the inlet of the storage tank to the partition wall of the building is lengthened to increase the chamber in the storage tank body. There is a need to. In other words, in a conventional storage tank, if more liquid flows in, the length of the liquid passage connecting the inlet and outlet is to be smoothly drained from the reservoir. Becomes longer. On the contrary, if an attempt is made to suppress the length of the liquid passage, it will take a longer time to start smooth drainage from the storage tank. That is, in the conventional storage tank, if more liquid is to be drained quickly and smoothly, the length of the liquid passage path and the length of the pipe of the entire drainage system tend to be long.

An object of the present invention is to provide a storage tank capable of quickly and smoothly draining a large amount of liquid while suppressing the length of a liquid passage.

The storage tank according to the present invention is a storage tank having an inflow port into which a liquid flows in and an outflow port from which the liquid flows out, and can store the liquid flowing in from the inflow port inside. A liquid passage path connecting the inlet and the outlet, guiding the liquid flowing from the inlet to the outlet, and extending linearly, and a liquid passage path on both sides of the liquid passage path, respectively. It has a liquid retention portion which is arranged at a position adjacent to the liquid passage path and is capable of retaining the liquid flowing in from the inflow port.
According to the storage tank according to the present invention, a large amount of liquid can be drained quickly and smoothly while suppressing the length of the liquid passage path.

In the storage tank according to the present invention, the length of the liquid passage in the extending direction of the liquid passage is preferably shorter than the length of the liquid retention portion in the extending direction of the liquid passage.
In this case, many liquids can be drained more quickly and smoothly.

The storage tank according to the present invention is arranged on the floor slab so that the liquid retention portion is arranged at each position on both sides along the floor slab of the building across the liquid passage path. It is preferable that it is a thing.
In this case, a large amount of liquid can be drained quickly and smoothly without ensuring a large height of the underfloor space.

In the storage tank according to the present invention, the bottom surface of the liquid retention portion has a flat surface portion, and the flat surface portion is inclined downward toward the liquid passage path in the extending direction of the liquid passage path. It is preferably a flat surface connected to the bottom surface of the liquid passage path.
In this case, many liquids can be drained more smoothly.

In the storage tank according to the present invention, the bottom surface of the liquid passage path is preferably located at a position lower than the bottom surface of the liquid retention portion.
In this case, the water can be drained more smoothly through the liquid passage.

In the storage tank according to the present invention, the bottom surface of the liquid retention portion extends along the peripheral wall forming the outer shape of the storage tank and forms the contour of the liquid retention portion in the plan view of the storage tank. It is preferable that the contour portion is a curved surface that is convex outward from the inside of the storage tank in the extending direction view of the contour portion.
In this case, it is possible to suppress the adhesion of dirt to the inner surface side of the peripheral wall on the bottom surface of the liquid retention portion.

According to the present invention, it is possible to provide a storage tank capable of quickly and smoothly draining more liquid while suppressing the length of the liquid passage.

It is a perspective view which shows the side of the inlet of the storage tank which concerns on one Embodiment of this invention from above. It is a perspective view which shows the side of the outlet of the storage tank of FIG. 1 from above. It is a front view of the storage tank of FIG. It is a rear view of the storage tank of FIG. It is a top view which shows the storage tank of FIG. 1 from above. FIG. 5 is a sectional view taken along the line AA of FIG. FIG. 5 is a cross-sectional view taken along the line BB of FIG. FIG. 3 is a system diagram schematically showing a partial cross section of an example of a drainage system to which the storage tank of FIG. 1 can be applied.

Hereinafter, the storage tank 1 according to the embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 8 shows an example of a drainage system 100 to which the storage tank 1 can be applied. In this example, the drainage system 100 is a siphon drainage system. The siphon drainage system utilizes the siphon principle to promote drainage. Such a drainage system 100 is adopted, for example, as a drainage system for an apartment house in which one building is divided into a plurality of floors.

In this example, the drainage system 100 includes a water supply device 110, a device drainage pipe 120, a storage tank 1, and a siphon drainage pipe 130. In this example, the siphon drainage pipe 130 is connected to the vertical pipe 150 via a pipe joint 140. The vertical pipe 150 penetrates each floor of the building in the vertical direction.

The water supply device 110 is arranged on each floor of the building. Examples of the water supply device 110 include a bathtub (unit bath), a wash basin, and a sink. In this example, the water supply device 110 is a unit bath.

The fixture drainage pipe 120 is arranged in the underfloor space S between the floor member 101 and the floor slab 102 of the building. The equipment drainage pipe 120 connects the water supply equipment 110 and the storage tank 1. In this example, the fixture drainage pipe 120 is composed of an upstream side portion 120a and a downstream side portion 120b connected to the upstream side portion 120a. In this example, the fixture drainage pipe 120 is arranged in the underfloor space S. The upstream portion 120a of the equipment drainage pipe 120 extends in the vertical direction and is connected to the water supply equipment 110. Further, the downstream portion 120b of the equipment drainage pipe 120 extends laterally in a state of being inclined downward toward the storage tank 1, and is connected to the storage tank 1. Further, in the present embodiment, the equipment drainage pipe 120 has a drainage trap 121 interposed in the downstream portion 120b.

In the siphon drainage pipe 130, a horizontal pulling pipe 130a, which will be described later, is arranged in the underfloor space S and hangs downward through the floor slab 102. In this example, the siphon drainage pipe 130 connects the storage tank 1 and the vertical pipe 150. The vertical pipe 150 is a drainage pipe that penetrates each floor of the building in the vertical direction. In the present embodiment, the siphon drainage pipe 130 is composed of a horizontal pulling pipe 130a and a vertical pipe 130b connected to the horizontal pulling pipe 130a. The horizontal pulling pipe 130a of the siphon drainage pipe 130 is arranged in the underfloor space S so as to have a substantially horizontal slopelessness. The vertical pipe 130b of the siphon drain pipe 130 hangs downward through the floor slab 102 and is connected to the vertical pipe 150 via the pipe joint 140.

In the drainage system 100, drainage is performed using the principle of siphon. First, in the drainage system 100, the water (liquid) in the water supply device 110 is drained from 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 water (drainage) drained from the outlet of the water supply device 110 drops the upstream portion 120a of the device drainage pipe 120 due to the weight of the drainage (falling push pressure). Next, the drainage of the upstream side portion 120a of the fixture drainage pipe 120 fills the downstream side portion 120b of the fixture drainage pipe 120, and then fills the horizontal pulling pipe 130a of the siphon drainage pipe 130 via the storage tank 1.

Here, in this example, the siphon drainage pipe 130 forms a siphon drainage channel that generates a suction force by the siphon force. As shown in FIG. 8, the siphon drainage channel is a horizontal pulling pipe (horizontal pipe) of the siphon drainage pipe 130, which is piped along the floor slab 102 on the floor where the water supply device 110 is installed. ) 130a, and a vertical pipe (outflow vertical pipe) 130b of the siphon drain pipe 130 that extends substantially vertically downward of the horizontal pull pipe 130a to form a droop and generate a siphon force (for example, negative pressure). Has been done.

According to the siphon drainage system using such a siphon drainage channel, the inside of the drainage pipe is filled with full flow drainage, and the drainage pipe forming the siphon drainage channel can be arranged without a gradient. .. Further, since the siphon drainage system is a full-flow drainage system, 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 siphon drainage system, 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, and the drainage source (for example, various water-related appliances 110) can be arranged. The extension distance from the vertical pipe 150 to the vertical pipe 150 (for example, the horizontal length L from the outlet of the water supply pipe 110 to the vertical pipe 130b of the siphon drain pipe 130) can be lengthened (see FIG. 8), and the degree of freedom in the layout of the living room. It becomes possible to raise.

In the siphon drainage channel of this example, the height difference H1 between the outlet of the water supply device 110 and the horizontal pull pipe 130a of the siphon drainage pipe 130 causes the drop pushing pressure of the drainage from the water supply device 110 to push the water supply device 110 and the device drainage pipe 120 and the siphon drainage pipe 120. The horizontal pull pipe 130a (horizontal length L) of the siphon drain pipe 130 was filled with water, and the vertical pipe 130b (hanging length H2) of the siphon drain pipe 130 was reached by filling the horizontal pull pipe 130a of the siphon drain pipe 130. The siphon action occurs when the drainage begins to fall down the vertical pipe 130b and the horizontal pulling pipe 130a of the siphon drainage pipe 130 becomes full. Using this siphon action as drainage power, the high-speed flow generated in the siphon drainage channel causes drainage from the water supply device 110, and the drainage is smoothly and promptly discharged to the inside of the pipe joint 140.

In the drainage system 100, a storage tank 1 is provided between the equipment drainage pipe 120 and the siphon drainage pipe 130 on the assumption that a large amount of water is drained from the water supply equipment 110 at one time. The storage tank 1 can temporarily store a large amount of water drained from the water supply device 110 at one time until the promotion of drainage is started.

1 and 2 are perspective views showing a storage tank 1 according to the present embodiment, respectively. The storage tank 1 has an inflow port 1a into which the drainage from the water supply device 110 flows in, and an outflow port 1b from which the drainage flows out, and the drainage flowing in from the inflow port 1a can be stored inside. In the present embodiment, the inflow port 1a and the outflow port 1b are each formed on the peripheral wall 2 of the storage tank 1.

The storage tank 1 has a liquid passage 3 that connects the inflow port 1a and the outflow port 1b and guides the drainage that has flowed in from the inflow port 1a to the outflow port 1b. The liquid passage 3 extends linearly as shown in FIG. 5 and the like described later. Further, in the present embodiment, more specifically, as shown in FIGS. 3 and 4, the liquid passage 3 has the outlet 1b in the flow direction view of the drainage (extended direction view of the liquid passage 3). It is aligned so as to overlap at least a part of the inflow port 1a in a straight line.

With reference to FIGS. 3 and 4, specific examples of the alignment of the inflow port 1a and the outflow port 1b include, for example, a method of combining any of the following (1) to (3).
(1) The center Oa of the inflow port 1a and the center Ob of the outflow port 1b are aligned on the same vertical line Oz in the extending direction of the liquid passage 3.
(2) The size of the inner diameter of the inlet 1a (the size of the radius ra of the inlet 1a) and the size of the inner diameter of the outlet 1b (the size of the radius rb of the outlet 1b) are adjusted.
(3) The distance ΔZ between the center Oa of the inflow port 1a and the center Ob of the outflow port 1b in the vertical direction (direction of the vertical line Oz) is adjusted.

In the present embodiment, using all the methods (1) to (3), the outlet 1b is at least one of the inlets 1a in the flow direction view of the drainage (extending direction view of the liquid passage 3). It is aligned so that it overlaps the part in a straight line. In particular, as shown in FIGS. 3 and 4, in the present embodiment, the size of the inner diameter of the outlet 1b is set to be smaller than the size of the inner diameter of the inlet 1a in (2). As a result, the amount of drainage discharged from the outlet 1b is smaller than the amount of drainage flowing out from the inlet 1a. Further, in the present embodiment, as shown in FIGS. 3 and 4, in (3), the center Oa of the inflow port 1a and the center Ob of the outflow port 1b are located at the lower end of the opening of the inflow port 1a. The vertical spacing ΔZ is adjusted so that the upper ends of the openings of 1b overlap.

Further, as shown in FIG. 5, the storage tank 1 is located at each position on both sides of the liquid passage 3 and is adjacent to the liquid passage 3, and drainage flowing in from the inflow port 1a. It has a liquid retention unit 4 capable of retaining the liquid. As shown in FIG. 5, each of the two liquid retention portions 4 has a bottom surface 4f partitioned inside the peripheral wall 2 and the liquid passage 3 in a plan view. The bottom surface 4f of the two liquid retention portions 4 together with the bottom surface 3f of the liquid passage 3 forms the bottom surface of the storage tank 1 partitioned inside the peripheral wall 2.

According to the storage tank 1 according to the present embodiment, as shown in FIGS. 3 to 5, the liquid passage 3 extends linearly without being curved or extending in a zigzag shape. .. As a result, the liquid passage 3 connecting the inflow port 1a and the outflow port 1b becomes the shortest path connecting the inflow port 1a and the outflow port 1b. Further, according to the storage tank 1 according to the present embodiment, the liquid retention portion 4 is arranged at each position on both sides of the liquid passage path 3 and adjacent to the liquid passage path 3. As a result, the length L3 of the liquid passage 3 in the extension direction of the liquid passage 3 (hereinafter referred to as “the extension direction of the liquid passage 3” is provided as a liquid storage unit for storing more wastewater is provided. The length L4 of the liquid retention portion 4 in the extending direction of the liquid passage 3 (hereinafter, also referred to as “the length L4 in the extending direction of the liquid retention portion 4”) without lengthening the length L3). ) Can be secured. Therefore, according to the storage tank 1 according to the present embodiment, a large amount of drainage can be quickly and smoothly drained while suppressing the length L3 of the liquid passage 3 in the extending direction.

Further, according to the storage tank 1 according to the present embodiment, the liquid retention portion 4 is arranged at each position on both sides of the liquid passage passage 3, so that the volume of the liquid retention portion 4 can be secured. For example, it is only necessary to increase the dimension (area) in the direction in which the liquid retention portion 4 extends, and it is possible to prevent the height of the liquid retention portion 4 and the height of the storage tank 1 from being increased. .. Therefore, as in the present embodiment, for example, in the storage tank 1, the direction in which the liquid retention portions 4 extend on both sides of the liquid passage path 3 is the horizontal direction, and the erecting direction of the peripheral wall 2 is the vertical direction. In addition, if it is installed on the floor slab 102 or the like, a large amount of liquid can be drained quickly and smoothly without ensuring a large height of the underfloor space S. Here, the "height of the storage tank 1" is the height (dimensions) of the storage tank 1 in the vertical direction. In other words, it is the height (dimensions) of the peripheral wall 2 of the storage tank 1 in the vertical direction.

From the above viewpoint, more specifically, for example, in the present embodiment, the height of the storage tank 1 can be made lower than the width of the storage tank 1, and preferably the height of the storage tank 1 is set to the storage tank 1. The height of the storage tank 1 is ½ or less, and more preferably 1/3 or less of the width of the storage tank 1. Here, the "width of the storage tank 1" is 2 in the peripheral wall 2 of the storage tank 1 facing each other, in the direction orthogonal to the height direction of the storage tank 1 and the extending direction of the liquid passage path 3. The maximum width between the two peripheral walls 2. That is, referring to FIG. 5, it is the width (dimension) between the outer surfaces of the two peripheral walls (side walls) 2c in the storage tank 1 arranged in the left-right direction of the drawing.

Further, in the present embodiment, as shown in FIG. 5, the extension direction length L3 of the liquid passage 3 is shorter than the extension direction length L4 of the liquid retention portion 4. In the present embodiment, the extension direction length L3 of the liquid passage 3 and the extension direction length L4 of the liquid retention portion 4 are each parallel to the extension direction of the liquid passage 3. Further, in the present embodiment, as shown in FIG. 5, the extending direction length L3 of the liquid passage 3 and the extending direction length L4 of the liquid retention portion 4 are respectively the inner surface 2f of the peripheral wall 2 of the storage tank 1. The length (dimension) between them. In this case, it is possible to secure a large amount of the two liquid retention portions 4 in the extending direction of the liquid passing path 3 while suppressing the length L3 of the liquid passing path 3 in the extending direction. Therefore, many liquids can be drained more quickly and smoothly.

In the present embodiment, as shown in FIG. 5, in a plan view, the peripheral wall 2 has two first facing walls 2a that define the extending direction length L3 of the liquid passage 3. An inflow port 1a or an outflow port 1b is formed on each of the two first facing walls 2a. Further, in the present embodiment, as shown in FIG. 5, in a plan view, the peripheral wall 2 has two second facing walls 2b that define the extending direction length L4 of the liquid retention portion 4. The second facing wall 2b is arranged at each position on both sides of the first facing wall 2a. That is, in the present embodiment, the storage tank 1 has two liquid retention portions 4. Therefore, in the present embodiment, the storage tank 1 has four second facing walls 2b. Further, in the present embodiment, the peripheral wall 2 has side walls 2c at each position on both sides of the liquid passage path 3 in a plan view as shown in FIG. The two side walls 2c connect the outer end of the second facing wall 2b on the inflow port 1a side and the outer end of the second facing wall 2b on the outflow port 1b side, respectively, and in the extending direction of the liquid passage 3. It extends along. Further, in the present embodiment, the first facing wall 2a on the inflow port 1a side is connected to the second facing wall 2b on the inflow port 1a side by the guide wall 2d. Similarly, in the present embodiment, the first facing wall 2a on the outlet 1b side is connected to the second facing wall 2b on the outlet 1b side by the guide wall 2d. In the present embodiment, the storage tank 1 has two liquid retention portions 4. Therefore, in the present embodiment, the storage tank 1 has four guide walls 2d.

As described above, in the present embodiment, the peripheral wall 2 is composed of two first facing walls 2a, four second facing walls 2b, two side walls 2c, and four guide walls 2d. Further, the peripheral wall 2 surrounds the liquid passage 3 and the two liquid retention portions 4 arranged on both sides of the liquid passage 3 in a plan view as shown in FIG. 5, and the outer shape of the storage tank 1 is butterflyed. It is shaped into a shape (H shape).

In the storage tank 1 according to the present embodiment, the distance between the two first facing walls 2a is narrower than the distance between the two facing second facing walls 2b. In other words, as described above, in the storage tank 1 according to the present embodiment, the extending direction length L3 of the liquid passage 3 is shorter than the extending direction length L4 of the liquid retention portion 4. Therefore, according to the present embodiment, the liquid retention portion 4 is secured long in the extending direction of the liquid passage path 3, and the distance between the inflow port 1a and the outflow port 1b is shortened, so that the inflow port 1a is shortened. The drainage from the outlet 1b flows more directly to the outlet 1b. Therefore, according to the present embodiment, the drainage flows smoothly, and as a result, the size of the storage tank 1 can be suppressed.

On the other hand, when the siphon drainage pipe 130 is connected to the outlet 1b of the storage tank 1, all the drainage flowing from the inlet 1a of the storage tank 1 is introduced into the siphon drainage pipe 130 at once through the outlet 1b. Not done. This is because the diameter of the horizontal pulling pipe 130a of the siphon drainage pipe 130 can be small, and as a result, the diameter of the outlet 1b of the storage tank 1 is also small and narrow. Further, the reason why all the drainage from the outlet 1b of the storage tank 1 is not introduced at once through the siphon drainage pipe 130 is that the siphon force from the siphon drainage pipe 130 does not work in the storage tank 1 at the initial stage of drainage. Sometimes. Due to these various factors, when the siphon drain pipe 130 is connected to the storage tank 1, water overflows from the outlet 1b, and the overflowing water temporarily collects in the liquid retention portion 4 provided in the storage tank 1. Become.

However, in the storage tank 1 according to the present embodiment, as described above, there are liquid retention portions 4 at the respective positions on both sides of the liquid passage passage 3, and the length L4 of the liquid retention portion 4 in the extending direction. Is longer than the extending direction length L3 of the liquid passage 3. Due to the shape of the storage tank 1, drainage can be convected in the liquid retention portion 4 in each of the two liquid retention portions 4. Therefore, the drainage overflowing from the outlet 1b of the storage tank 1 tends to flow to the inlet 1a along the convection flow. As a result, as illustrated by the broken line arrow in FIG. 5, in the two liquid retention portions 4 arranged on both sides of the liquid passage path 3, the drainage that has flowed into and stored in the storage tank 1 passes through the liquid. Convection can be performed in the liquid retention portion 4 with the downstream of the path 3 as a base point. In this case, even when the amount of drainage flowing into the storage tank 1 is small, the bottom surface 3f of the liquid passage path 3 and the bottom surface 4f of the liquid retention portion 4 are less likely to get dirty.

In particular, in the present embodiment, the guide walls 2d on the outlet 1b side are, as shown in FIG. 5, in a plan view, from the first facing wall 2a on which the outlet 1b is formed to the downstream side in the flow direction of the drainage. It is inclined toward the direction away from the liquid passage 3. In other words, as shown in FIG. 5, in a plan view, the space between the two guide walls 2d on the outlet 1b side expands toward the downstream side in the flow direction of the drainage. As a result, the drainage that cannot be discharged from the outlet 1b at a time is the guide wall on the outlet 1b side from the inner surface 2f side (downstream side of the liquid passage 3) of the first facing wall 2a in which the outlet 1b is formed. Along the inner surface 2f of 2d, it is guided to the inner surface 2f side of the second facing wall 2b on the outlet 1b side. Further, the drainage guided to the inner surface 2f side of the second facing wall 2b on the outlet 1b side is guided to the inner surface 2f side of the side wall 2c along the inner surface 2f of the second facing wall 2b on the outlet 1b side.

Further, in the present embodiment, the guide wall 2d on the inflow port 1a side is viewed in a plan view as shown in FIG. It is inclined toward the liquid passage path 3. In other words, as shown in FIG. 5, in a plan view, the space between the two guide walls 2d on the inflow port 1a side tapers toward the downstream side in the flow direction of the drainage. As a result, the drainage guided to the inner surface 2f side of the second facing wall 2b on the inflow port 1a side along the inner surface 2f of the side wall 2c flows along the inner surface 2f of the guide wall 2d on the inflow port 1a side to the inflow port 1a. Is guided to the inner surface 2f side (upstream side of the liquid passage 3) of the first facing wall 2a in which the is formed.

As described above, according to the present embodiment in which the guide wall 2d is inclined, as shown by the broken line arrow in FIG. 5, the downstream of the liquid passage path 3 is used as the base point in each of the two liquid retention portions 4. Convection can be generated more efficiently. In this embodiment, a vent 1c is formed on the second facing wall 2b on the outlet 1b side. The vent 1c is an opening through which air flows between the liquid retention portion 4 in the storage tank 1 and the outside. By providing the vent 1c, drainage can be performed more smoothly. Such a vent 1c is effective when the inside of the storage tank 1 is closed by a lid or the like.

By the way, the liquid retention portion 4 is arranged at each position on both sides of the liquid passage path 3 in a direction orthogonal to the extending direction of the liquid passage path 3. In the present embodiment, as shown in FIG. 8 and the like, the two liquid retention portions 4 are arranged at their respective positions on both sides along the floor slab 102 with the liquid passage path 3 interposed therebetween. It is preferably arranged on the slab 102. In this case, a large amount of liquid can be drained quickly and smoothly without ensuring a large height of the underfloor space S.

Further, FIG. 6 is a cross section perpendicular to the extending direction of the liquid passage 3 in the storage tank 1 according to the present embodiment. As shown in FIG. 6, the bottom surface 4f of the liquid passage portion 4 is a plane that inclines downward toward the liquid passage path 3 in the extending direction of the liquid passage path 3 and is connected to the bottom surface 3f of the liquid passage path 3. Is. In this case, the drainage accumulated in the liquid retention portion 4 flows through the bottom surface 4f of the liquid retention portion 4 and flows into the liquid passage path 3. As a result, the drainage accumulated in the liquid retention portion 4 easily goes to the outflow port 1b through the liquid passage path 3. Therefore, a large amount of drainage can be drained more smoothly. As shown in FIG. 6, in the present embodiment, the bottom surface 4f of the liquid retention portion 4 is indicated by a horizontal axis (in FIG. 6, a straight line Oy that appears when the horizontal plane is viewed in the extending direction of the liquid passage path 3). ) Is tilted at an angle A4. The angle A4 can be appropriately set according to the internal capacity, size, and the like of the storage tank 1. The angle A4 can be, for example, an angle of 0.5 ° to 5 °. If the angle A4 is less than 0.5 °, it is less effective in forming convection of drainage. Further, when the angle A4 is 5 ° or more, the inclination becomes too steep, so that if the drainage does not enter the outlet 1b and the water overflows, the overflowing water does not flow well to the liquid retention portion 4.

By the way, in the present embodiment, as shown in FIG. 6, the bottom surfaces 4f of the two liquid retention portions 4 are inclined downward as they approach each other. In this case, if the lower ends of the bottom surfaces 4f of the two liquid retention portions 4 are directly connected, the liquid passage path 3 can be a V-groove having the directly connected portions of the two bottom surfaces 4f as the groove bottom. Alternatively, if the lower ends of the bottom surfaces 4f of the two liquid retention portions 4 are connected via a flat surface, the liquid passage path 3 can be a trapezoidal V-groove having the flat surface as a groove bottom. The bottom surface 3f of these liquid passages 3 is at the same height as the bottom surface 4f of the two liquid retention portions 4.

In the present embodiment, the bottom surface 3f of the liquid passage 3 is located lower than the bottom surface 4f of the two liquid retention portions 4 with respect to the above-mentioned exemplary liquid passage 3. In this case, the drainage accumulated in the liquid retention portion 4 easily flows into the liquid passage 3 through the bottom surface 4f of the liquid retention portion 4. As a result, it becomes possible to guide the drainage to the outlet 1b, and the drainage can be drained more smoothly through the liquid passage 3. In the present embodiment, as shown in FIG. 6, the bottom surfaces 4f of the two liquid retention portions 4 are inclined downward as they approach each other, and the lower ends of the bottom surfaces 4f of the two liquid retention portions 4 are projected downward through a curved surface. Are connected. In the present embodiment, the bottom surface 3f of the liquid passage 3 is composed of the curved surface. As a result, as shown in FIG. 6, in the present embodiment, the bottom surface 3f of the liquid passage 3 is located lower than the bottom surface 4f of the two liquid retention portions 4. In this way, if the bottom surface 3f of the liquid passage 3 is set to a low position, the drainage can flow more smoothly to the outlet 1b. Further, if the bottom surface 3f of the liquid passage 3 is formed of a curved surface as in the present embodiment, the drainage can flow more smoothly through the outlet 1b.

Note that FIG. 7 is a cross-sectional view of the storage tank 1 according to the present embodiment along the extending direction of the liquid passage path 3. As shown in FIG. 7, in the present embodiment, the bottom surface 3f (more specifically, at least the deepest part of the bottom surface 3f) of the liquid passage 3 is inclined downward from the inflow port 1a toward the outflow port 1b. There is. In the present embodiment, the bottom surface 3f of the liquid passage 3 is inclined at an angle A3 with respect to the horizontal axis (in FIG. 7, the straight line Ox that appears when the horizontal plane is viewed in the width direction of the liquid passage 3). There is. Specifically, the bottom surface 3f of the liquid passage 3 is connected to a straight line portion 3f1 that inclines at a constant angle A3 from the inlet 1a toward the outlet 1b, and an adjacent portion 3f2 adjacent to the outlet 1b. It is composed of. In the present embodiment, the adjacent portion 3f2 is composed of a curved surface protruding outward from the inside of the storage tank 1. Further, it is preferable that the slope (angle A3) of the bottom surface 3f of the liquid passage 3 is 1/100 or more. In this case, drainage remains in the storage tank 1, and dirt does not adhere to the storage tank 1 due to the dry drainage.

Further, in the present embodiment, as shown in FIG. 5, the bottom surface 4f of the liquid retention portion 4 extends along the peripheral wall 2 of the storage tank 1 and forms the contour of the liquid retention portion 4 in a plan view. have. The portion of the bottom surface 4f of the liquid retention portion 4 excluding the contour portion 4f2 is formed as a flat surface portion 4f1 of the bottom surface 4f of the liquid retention portion 4. That is, in the present embodiment, the bottom surface 4f of the liquid retention portion 4 is formed by a flat surface portion 4f1 and a contour portion 4f2. Further, in the present embodiment, as shown in FIG. 6, the contour portion 4f2 of the bottom surface 4f of the liquid retention portion 4 is connected to the inner surface 2f of the peripheral wall 2 in the extending direction view of the contour portion 4f2, and is inside the storage tank 1. It is a curved surface that is convex outward from the surface. In this case, it is possible to suppress the adhesion of dirt to the inner surface 2f side of the peripheral wall 2 on the bottom surface 4f of the liquid retention portion 4. In the present embodiment, the curved surface is formed by connecting the inner surface 2f of the peripheral wall 2 and the bottom surface 4f (flat surface portion 4f1) of the liquid retention portion 4 with a curve having a radius of curvature r4. Further, in FIG. 6, only the contour portion 4f2 corresponding to the side wall 2c of the peripheral wall 2 has been exemplified as a curved surface, but the same applies to the contour portion 4f2 corresponding to the other wall of the peripheral wall 2.

As described above, according to the storage tank 1 according to the present embodiment, it is possible to provide the storage tank 1 capable of quickly and smoothly draining a large amount of drainage while suppressing the length of the liquid passage 3. ..

The above description describes an exemplary embodiment of the present invention, and various modifications can be made without departing from the scope of the claims. For example, the storage tank 1 can be integrally manufactured by injection molding with a resin, but the manufacturing method of the storage tank 1 is not limited to injection molding. The storage tank 1 can be provided with a removable lid that closes the opening formed at the upper end of the peripheral wall 2. Further, the configuration of the drainage system 100 is not limited to the configuration of the present embodiment. For example, the equipment drainage pipe 120 and the siphon drainage pipe 130 have been described as a drainage pipe in which the upstream side portion (horizontal pulling pipe) and the downstream side portion (vertical pipe) are integrated, but the upstream side portion (horizontal pulling pipe). And the downstream part (vertical pipe) are separate drain pipes, and by connecting these drain pipes to each other, it is possible to make an instrument drain pipe 120 or a siphon drain pipe 130.

1: Storage tank, 1a: inlet, 1b: outlet, 1c: vent, 2: peripheral wall, 2a: first facing wall, 2b: second facing wall, 2c: side wall, 2d: guide wall, 2f: inner surface , 3: Liquid passage, 3f: Bottom of liquid passage, 3f1: Straight part of bottom of liquid passage, 3f2: Adjacent part of bottom of liquid passage, 4: Liquid retention part, 4f: Bottom of liquid retention part , 4f1: Flat part of the bottom surface of the liquid retention part, 4f2: Contour part of the bottom surface of the liquid retention part, 100: Drainage system, 101: Floor member, 102: Floor slab, 110: Water supply equipment, 120: Equipment drainage pipe, 120a: upstream part of equipment drain pipe, 120b: downstream part of equipment drain pipe, 121: drain trap, 130: siphon drain pipe, 130a: horizontal pull pipe of siphon drain pipe, 130b: vertical pipe of siphon drain pipe, 140: Pipe joint, 150: Vertical pipe, S: Underfloor space

Claims (6)

A storage tank having an inflow port into which a liquid flows in and an outflow port from which the liquid flows out, and capable of storing the liquid flowing in from the inflow port inside.
A liquid passage path that connects the inlet and the outlet, guides the liquid flowing from the inlet to the outlet, and extends linearly.
A liquid retention portion that is located on both sides of the liquid passage path and is adjacent to the liquid passage path and is capable of retaining the liquid that has flowed in from the inflow port.
And have a,
The guide wall on the inflow port side is inclined toward the liquid passage path toward the downstream in the flow direction of the drainage in a plan view.
The inflow port is a storage tank formed on the downstream side of the guide wall on the inflow port side. The storage tank according to claim 1, wherein the length of the liquid passage in the extending direction of the liquid passage is shorter than the length of the liquid retention portion in the extending direction of the liquid passage. The storage tank is arranged on the floor slab so that the liquid retention portion is arranged at each position on both sides along the floor slab of the building across the liquid passage path. , The storage tank according to claim 1 or 2. The bottom surface of the liquid retention portion has a flat surface portion, and the flat surface portion is inclined downward toward the liquid passage path in the extending direction of the liquid passage path and is connected to the bottom surface of the liquid passage path. The storage tank according to any one of claims 1 to 3, which is a flat surface. The storage tank according to any one of claims 1 to 4, wherein the bottom surface of the liquid passage path is located at a position lower than the bottom surface of the liquid retention portion. The bottom surface of the liquid retention portion extends along the peripheral wall forming the outer shape of the storage tank and has a contour portion forming the contour of the liquid retention portion in a plan view of the storage tank, and the contour portion has a contour portion. The storage tank according to any one of claims 1 to 5, which is a curved surface that is convex outward from the inside of the storage tank in the extending direction of the contour portion.

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