JP6820173B2 - Drain trap - Google Patents

Description

The present invention relates to a drain trap provided in a drain channel.

Conventionally, a drain trap having a sealing water inside the flow path, which is provided downstream of the flow path for drainage from a kitchen sink, a wash basin, or the like, is known. By sealing the water in the drain trap, it is possible to prevent odors, pests, etc. from invading the upstream side of the drain trap from the downstream side of the drain trap.
In a drainage structure equipped with this drainage trap, a drainage system using a siphon phenomenon has been proposed, which can improve drainage power and can be constructed in a small area. As a component of such a drainage system, for example, there is a drainage trap (see Patent Document 1).

In this drain trap, the ascending portion of the flow path, which is the downstream side of the bent portion where the sealing water is located, has a reduced diameter (narrower water flow area) than the rising portion from the bent portion, and is bent. A cleaning port is provided in the section. As a result, the decelerated drainage at the bent portion accelerates at the rising portion, and the siphon phenomenon is preferably generated without causing unevenness in the flow velocity, and the cleanability when the inside of the pipe is clogged is improved. ..

JP-A-2015-98702

By the way, in recent years, the use of disposers that are installed on the upstream side of the drain trap of the kitchen sink to crush kitchen waste, mainly food waste such as vegetable waste, is increasing, but in the case of food waste containing a large amount of fiber. , It was inevitable that a large amount of fiber residue would remain after passing through the disposer.
For this reason, in the conventional drainage trap in which the ascending portion following the bent portion is reduced in diameter from the bent portion, when a disposer is used, the reduced diameter portion is rapidly reduced in diameter with the bent portion as a boundary. There was a risk that the residual fibrous material that had flowed in with the drainage and passed through the disposer would stay in this reduced diameter portion and cause clogging.

Therefore, an object of the present invention is to provide a drain trap that makes it difficult for the residual portion to stay even if there is a large amount of residual fiber or the like that has flowed in with the drainage, and can suppress the occurrence of clogging due to the retention.

In order to achieve the above object, the drain trap according to the present invention is connected to the drain port, and the first lowering portion where the flow path descends from the drain port toward the downstream side and the flow path rises toward the downstream side. It has a first rising portion and a bottom portion where the flow path bends, connecting the first falling portion and the first rising portion, and the first lowering portion is at least a part along the flow path. It is characterized in that it has a reduced diameter portion whose flow path diameter is reduced toward the downstream side, and the minimum flow path diameter of the reduced diameter portion is equal to or larger than the maximum flow path diameter of the first rising portion. .. According to the drain trap according to the present invention, even if there is a large amount of residual fiber or the like that has flowed in with the drainage, it is difficult for the residual component to stay, and it is possible to suppress the occurrence of clogging due to the retention.

In the drain trap of the present invention, it is preferable that the diameter-reduced portion is reduced in diameter at a constant rate of change. According to this configuration, the flow of drainage can be made smoother.
In the drain trap of the present invention, 0.03 ≦ (ab) / c ≦ 0.5, where a is the maximum flow path diameter of the reduced diameter portion, b is the minimum flow path diameter, and c is the length in the flow path direction. , Is preferable. According to this configuration, even if there is a large amount of residual fiber or the like that has flowed in with the wastewater, it is more difficult for the residual component to stay, and it is possible to further suppress the occurrence of clogging due to the retention.
In the drain trap of the present invention, it is preferable that the flow path diameter of the bottom portion is constant over the entire axial length of the bottom portion. According to this configuration, the flow of drainage in the drainage channel at the bottom can be smoothed.

In the drain trap of the present invention, on the downstream side of the first rising portion, a flow path connecting the second falling portion in which the flow path descends toward the downstream side and the first rising portion and the second falling portion is formed. It is preferable that the top portion is further bent, and the diameter of the flow path of the top portion is reduced toward the downstream side. According to this configuration, the flow velocity in the drainage channel at the top can be increased.

According to the present invention, even if there is a large amount of residual fiber or the like that has flowed in with the wastewater, it is difficult for the residual component to stay, and it is possible to suppress the occurrence of clogging due to the retention.

It is an external view of the drain trap which concerns on one Embodiment of this invention. It is sectional drawing along the flow path which shows the internal structure of the drain trap of FIG.

Hereinafter, a mode for carrying out the present invention will be described with reference to the drawings.
As shown in FIGS. 1 and 2, the drain trap 10 of the present embodiment is connected to a drain port (not shown), and the first lowering portion 11 and the first lowering portion 11 in which the flow path descends from the drain port toward the downstream side are first lowered. The bottom portion 12 that connects the portion 11 and the first rising portion 13 described later, the first rising portion 13 in which the flow path rises toward the downstream side, the first rising portion 13 and the second falling portion described later. It has a top portion 14 connecting the portions 15 and having a bent flow path, and a second lowering portion 15 on the downstream side of the first rising portion 13 in which the flow path descends toward the downstream side.

The drain trap 10 is provided downstream of the drainage flow path from the kitchen sink, wash basin, etc., and in the present embodiment, downstream of the disposer (not shown) installed at the drain port of the kitchen sink (not shown). It is attached to the side. The disposer crushes kitchen waste mainly composed of kitchen waste such as vegetable waste, and the kitchen waste crushed by the disposer is discharged to the drain trap 10 together with the drainage flowing into the disposer.
The drain trap 10 of the present embodiment is a substantially S-shaped drain trap formed by bending the pipe body by about 180 ° at the bottom 12 and the top 14, respectively, and forms a sealing water at least at the bottom 12. By this water sealing, it is possible to prevent odors, pests and the like from entering the upstream side of the drain trap 10 from the downstream side of the drain trap 10.

The first lowering portion 11 is a drainage flow path formed by arranging the pipe body substantially vertically toward the downstream side in the present embodiment, and is located on the most upstream side of the drainage trap 10 and is a disposer. In addition to communicating with the drainage flow path from the above, it bends from the lower end and communicates with the bottom portion 12. The first lowering portion 11 has a slightly enlarged diameter at the upper end because the pipe 16 communicating with the disposer is inserted inside the upper end side, but the pipe 16 communicating with the disposer and the first lowering portion 11 Each inner surface is flush with each other.
The first lowering portion 11 has a reduced diameter portion 17 that is at least a part along the flow path and whose flow path diameter (that is, the inner diameter of the pipe body) is reduced toward the downstream side. The minimum flow path diameter of the reduced diameter portion 17 is formed to be equal to or larger than the maximum flow path diameter of the first rising portion 13. In the present embodiment, the diameter-reduced portion 17 is reduced in diameter at a constant rate of change in the flow path diameter (that is, the inner diameter of the pipe body) toward the downstream side.

The reduced diameter portion 17 of the present embodiment has a flow path diameter (that is, inner diameter of the pipe body) on the upstream side and the downstream side on the downstream side of the pipe 16 communicating with the disposer, which is inserted into the upper end side of the first lowering portion 11. The upstream end is continuous via the disjointed connecting portions 18. In the present embodiment, the reduced diameter portion 17 has a shape in which the truncated cone is inverted (downward), which is a part of the first lowered portion 11, and the upstream end portion is the maximum of the reduced diameter portion 17. It has a flow path diameter, and the downstream end portion has a minimum flow path diameter of the reduced diameter portion 17 and is continuous with the bottom portion 12.

In the present embodiment, the diameter reduction ratio of the reduced diameter portion 17 is such that the maximum flow path diameter of the reduced diameter portion 17 is a, the minimum flow path diameter is b, and the length in the flow path direction (that is, from the upstream end to the downstream end). Length) as c
0.03 ≦ (ab) / c ≦ 0.5
Is set to. It is more preferable to set 0.05 ≦ (ab) / c ≦ 0.2.
Since the first lowering portion 11 has the reduced diameter portion 17, the flow velocity of the drainage flowing from the pipe 16 communicating with the disposer in the reduced diameter portion 17 increases, and after the inside of the reduced diameter portion 17 is drained and crushed. It becomes filled with the kitchen and the siphon phenomenon occurs. As a result, in the drain trap 10, a negative pressure is generated so that the drainage flowing through the drainage channel is drawn to the downstream side, and the flow velocity of the drainage is further accelerated. Further, when the flow path diameter of the reduced diameter portion 17 is reduced at a constant rate of change, the flow of drainage can be made smoother.

In the present embodiment, the bottom portion 12 is formed in a substantially U shape upward by bending the tubular body by about 180 °, and connects and communicates the first lowering portion 11 and the first rising portion 13. A cleaning port 19 that opens to the outside is opened at a position that is substantially the lowest portion of the bottom portion 12, and a cap (not shown) is screwed onto the outer wall portion 19a formed outside the cleaning port 19. .. Since the cap is watertightly screwed with the cleaning port 19, water does not leak from the cleaning port 19.
In the present embodiment, the flow path diameter (that is, the inner diameter of the pipe body) of the bottom portion 12 is the bottom portion 12 from the connecting end between the first lowering portion 11 and the bottom portion 12 to the connecting end between the bottom portion 12 and the first rising portion 13. It is constant over the entire length of the flow path. This constant shall include those having an increase or decrease in the range of 10% in addition to being the same.

Since the flow path diameter is constant over the entire length of the flow path of the bottom portion 12, the flow of drainage in the drainage flow path of the bottom portion 12 can be smoothed. That is, since the flow path resistance at the bottom portion 12 can be eliminated as much as possible, the drainage that has flowed through the first lowering portion 11 stays in the middle even if the flow path is bent, including the crushed kitchen waste. It flows smoothly through the drainage flow path of the bottom 12 without any problem.

In this way, the wastewater that has flowed through the first lowering portion 11 is less likely to retain the residual portion even if there is a large amount of residual fiber or the like that has flowed in with the drainage, and the occurrence of clogging due to retention can be suppressed. In particular, in the present embodiment, even if there is a large amount of residual fiber or the like after passing through the disposer 16, the first lowering portion 11 and the bottom portion 12 are connected after the flow velocity of the drainage is accelerated due to the occurrence of the siphon phenomenon. Since it flows smoothly through the bottom 12 without generating turbulent flow in the portion, it is possible to make it difficult for residual components to accumulate and to suppress the occurrence of clogging due to retention in the drainage flow path, especially in the bent flow path. it can.

In the present embodiment, the first rising portion 13 is a drainage flow path formed by arranging the pipes substantially vertically from the upstream side to the downstream side of the drain trap 10, and rises from the bottom 12 to the top. It communicates with 14. The flow path diameter (that is, the inner diameter of the pipe body) of the first rising portion 13 is the first rising portion from the connecting end between the bottom portion 12 and the first rising portion 13 to the connecting end between the first rising portion 13 and the top portion 14. It is constant over the entire length of the 13 flow paths. This constant shall include those having an increase or decrease in the range of 10% in addition to being the same.

Therefore, in the present embodiment, the flow path diameter (that is, the inner diameter of the pipe body) of the drainage flow path formed by the bottom portion 12 and the first rising portion 13 is constant over the entire length of the drainage flow path, and in addition, communicates with the bottom portion 12. Since the minimum flow path diameter of the reduced diameter portion 17 is equal to or larger than the maximum flow path diameter of the first rising portion 13, the drainage that has flowed from the first falling portion 11 through the bottom portion 12 to the first rising portion 13 is crushed and then used as a kitchen wastewater. It flows smoothly through the drainage channel without any stagnation.
In the present embodiment, the top portion 14 is formed in a substantially U-shape downward by bending the tubular body by about 180 °, and connects and communicates the first rising portion 13 and the second falling portion 15.

In the present embodiment, the flow path diameter of the top portion 14 (that is, the inner diameter of the pipe body) is the top portion 14 from the connecting end of the top portion 14 with the first rising portion 13 to the connecting end of the top portion 14 with the second falling portion 15. The diameter is reduced toward the downstream side over the entire length of the flow path.
The siphon phenomenon occurs at the top 14 because the diameter of the top 14 is reduced as it descends toward the downstream side. As a result, the flow velocity in the drainage flow path of the top 14 can be increased, a negative pressure is generated in the drainage trap 10 so that the drainage flowing through the drainage flow path is drawn to the downstream side, and the flow velocity of the drainage is further accelerated. Will be done. When the top 14 is reduced in diameter at a constant rate of change, the flow of drainage can be made smoother.

A vent valve port 20 that opens to the outside is opened at a position that is substantially the highest portion of the top portion 14, and a vent valve (not shown) is attached to the outer wall portion 20a formed outside the vent valve port 20. The part is screwed. In the present embodiment, the vent valve port 20 is arranged at substantially the center of the length of the top 14 in the flow path direction, which is the substantially highest portion of the top 14, and the outer wall portion 20a is the center line of the opening surface of the vent valve 20. It has a substantially bowl shape with the upper part expanded substantially evenly, which is a rotating body centered on.
The second lowering portion 15 is a drainage flow path formed by arranging the pipes substantially vertically toward the downstream side in the present embodiment, and is located on the most downstream side of the drainage trap 10 to drain water. It communicates with the downstream side of the flow path of the drainage system in which the trap 10 is arranged.

10: Drain trap, 11: First lowering part, 12: Bottom, 13: First rising part, 14: Top, 15: Second lowering part, 16: Piping communicating with disposer, 17: Reduced diameter part, 18: Connection part, 19: Cleaning port, 19a: Outer wall part, 20: Vent valve port, 20a: Outer wall part

Claims (5)

The first lowering part, which is connected to the drainage port and the flow path descends from the drainage port toward the downstream side,
The first rising part where the flow path rises toward the downstream side,
It has a bottom portion where the flow path bends, which connects the first lowering portion and the first rising portion.
The first lowering portion is at least a part along the flow path, and has a reduced diameter portion whose flow path diameter is reduced toward the downstream side, and the minimum flow path diameter of the reduced diameter portion is the said. maximum passage diameter or less on der first rising portion is,
A drain trap characterized in that the downstream end portion of the reduced diameter portion is continuous with the bottom portion . The drain trap according to claim 1, wherein the reduced diameter portion is reduced in diameter at a constant rate of change. The maximum flow path diameter of the reduced diameter portion is a, the minimum flow path diameter is b, and the flow path direction length is c.
0.03 ≦ (ab) / c ≦ 0.5
The drain trap according to claim 2. The drain trap according to any one of claims 1 to 3, wherein the flow path diameter of the bottom is constant over the entire axial length of the bottom. On the downstream side of the first rising part, the second falling part where the flow path descends toward the downstream side,
It further has a top where the flow path bends, connecting the first rising portion and the second falling portion.
The drain trap according to any one of claims 1 to 4, wherein the diameter of the flow path of the top is reduced toward the downstream side.

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