JP5569854B2 - Drain trap - Google Patents

Description

  The present invention relates to a drain trap, and more particularly, to a drain trap provided below a water tank so that water drained from a water tank such as a washstand, a sink and a bathtub flows out to the sewage side.

Conventionally, for example, a storage space as a storage unit such as a cabinet is provided below a wash basin of a wash basin used as a water tank, and water drained from the wash basin is disposed on the sewage side in a part of this storage space. A drainage trap is provided to drain the water. Such a conventional drainage trap is generally provided with an S-shaped piping path and is arranged near the center of the cabinet storage space. When storing items in the storage space under the basin, Often suffered from the problem of reducing effective storage space.
Therefore, in the conventional drain trap described in Patent Document 1, a box-shaped drain trap is adopted instead of the S-shaped drain trap, and an effective storage space below the wash basin of the wash basin is secured. It has been known.

On the other hand, the conventional general wash basin is often used in a state where water is accumulated in the basin, but the water accumulated in the basin does not overflow from the basin after reaching a predetermined water level. Thus, an overflow port is provided in a part of the inner surface of the basin, and an overflow pipe is connected to the overflow port of the basin. The drainage overflowing from the basin after the water accumulated in the basin reaches a predetermined water level is drained to the drain trap side by this overflow pipe.
However, in the conventional drain trap described in Patent Document 1 described above, since it is not considered to provide an overflow pipe, if an overflow pipe is provided, it is effective under the washbasin of the washstand. There is a problem that it is difficult to secure a storage space.

Moreover, in the conventional drain trap described in Patent Document 2, an overflow pipe connected to the overflow port of the basin is known. In this overflow pipe, in order to prevent the odor from returning from the sewage pipe, it cannot be directly connected to the sewage pipe and communicated with it, and the odor must be blocked by the sealed water. Since it cannot be formed, the outlet of the overflow pipe is connected in the middle of the drain pipe connected between the drain of the basin and the drain trap that can be sealed, and overflows from the overflow of the basin Water flows through the overflow pipe and is drained into the drain pipe.
Furthermore, in the conventional drain trap described in Patent Document 2 described above, the connection between the drain pipe connected between the drain of the basin and the drain trap capable of sealing and the outlet of the overflow pipe A barrier that covers about 2/3 of the upper half of the overflow pipe is provided in the vicinity of the section, and this barrier prevents the air from flowing from the overflow pipe to the drain pipe when draining the drain pipe. ing.

  Patent Document 3 discloses a drainage merging pipe having a drainage main pipe part and a drainage branch pipe part that is provided so as to protrude in the side surface direction of the drainage main pipe part and allows drainage to flow into the drainage main pipe part side. Has been. This drainage merging pipe has a drainage inflow mechanism that allows a part of the drainage of the drainage main pipe part to flow into the drainage branch pipe side, and when drainage is performed to the drainage main pipe part, a part of the drainage of the drainage main pipe part Is caused to flow into the drainage branch pipe part, so that abnormal noise and siphon phenomenon generated in the drainage branch pipe part are suppressed.

JP-A-7-71061 Japanese Patent Laid-Open No. 11-21969 JP 2002-294780 A

  However, in the conventional drain trap described in Patent Document 2 described above, an overflow pipe is connected in the middle of the drain pipe connected between the drain port of the basin and the drain trap. The connection part between the pipe and the drain pipe is arranged at the substantially central side in the storage space. Also, when connecting the drain pipe to the drain of the basin, it is necessary to connect the overflow pipe to the drain pipe with the drain pipe extending downward so that the overflow pipe does not interfere with this connection. Yes, the drain trap itself is located below the connection between the overflow pipe and the drain pipe, and is located in the lower space in the storage space of the basin, so that the effective storage space below is particularly narrowed. is there.

  Moreover, in the conventional drain trap described in Patent Document 2 described above, the outlet portion of the overflow pipe is connected in the middle of the drain pipe connected between the drain port of the basin and the drain trap capable of being sealed. Therefore, drainage from the drain of the basin may temporarily flow back into the overflow pipe at the connection between the drain pipe and the outlet of the overflow pipe, and then flow into the drain pipe again, preventing smooth drainage. There is a problem that there is. Furthermore, immediately after the drainage from the drain of the basin is completed, the pressure near the outlet of the overflow pipe in the drain pipe also decreases, so a negative pressure is generated that draws air from the overflow pipe into the drain pipe. There is also a problem that abnormal noise due to the pulling in becomes easy to occur.

  Furthermore, also in the drainage junction pipe described in Patent Document 3 described above, when drainage is performed on the drainage main pipe part, the drainage inflow mechanism causes the drainage to flow backward to the drainage branch pipe part. Smooth drainage to the sewage side may be hindered, and immediately after drainage of the drainage main pipe part is completed, the pressure near the connection part between the drainage main pipe part and the drainage branch pipe part also decreases. There is also a problem that a negative pressure that draws air into the drainage main pipe portion is generated, and abnormal noise is easily generated due to the air drawing.

  Therefore, the present invention has been made to solve the above-described problems of the prior art, and suppresses the generation of negative pressure that draws air from the overflow pipe into the drain trap without impairing the smooth flow of the drain. In addition, an object of the present invention is to provide a drain trap capable of suppressing noise generated by the air being drawn.

In order to achieve the above object, the present invention provides a drain trap provided below the water tank so that the water drained from the water tank flows out to the sewage side, and is provided at a drain outlet located below the water tank. A drain pipe connected to the drain pipe for guiding drain water flowing out from the drain outlet, and a sealed water connected to the drain pipe to form a flow path for drainage from the drain pipe and capable of closing the outlet portion of the drain pipe. A sealed water chamber to be accommodated, an outflow pipe connected to the sealed water chamber so as to guide the waste water overflowing from the sealed water chamber to the sewage side, and a waste water flowing out from an overflow port opened above the water tank And an outlet pipe whose outlet is positioned upstream of the outlet pipe, and the outlet pipe is formed so that the outlet pipe is throttled from the upstream side of the outlet pipe. It includes a the flow path diaphragm portion, whose cross-section Formed crucible so that crescent shape, is characterized in that it is formed so as to surround a portion of the outer periphery of the substantially the waste water pipe inside the cross section of the crescent-shaped or the overflow tube.
In the present invention configured as described above, the outflow pipe is provided with a flow restrictor formed so as to be restricted from the flow path on the upstream side thereof, and thus is drained from the sealed chamber to the outflow pipe. At this time, pressure loss occurs in the flow restrictor of the outflow pipe, and the pressure in the sealed water chamber located on the upstream side of the flow restrictor of the outflow pipe and the drain pipe connected to the upstream side of the sealed water chamber is increased. At the same time, since the inflow amount of drainage flowing from the drainage pipe to the sealed water chamber exceeds the outflow amount of drainage flowing from the sealed water chamber to the outflow pipe, the sealed water chamber becomes almost full. As a result, the generation of negative pressure can be suppressed in the vicinity of the outlet portion of the overflow pipe located upstream from the outflow pipe. Therefore, it is possible to suppress noise generated by air being drawn into the sealed water chamber from the overflow pipe by negative pressure without impairing the smooth flow of the drainage in the drain trap. Further, the flow path restricting portion of the outflow pipe is formed so as to have a substantially crescent-shaped cross section, and is formed so as to surround a part of the outer periphery of the drain pipe or the overflow pipe inside the crescent-shaped cross section. Therefore, the space required for the sealed chamber and the outflow pipe can be reduced. For example, it is possible to reduce the space occupied by the drain trap itself with respect to the entire storage space in the storage portion formed below the wash basin of a wash basin used as a water tank. Therefore, the space around the drain trap can be secured as an effective storage space of the storage unit, and can be used more effectively.

In the present invention, preferably, the outflow pipe is set so that the cross-sectional area of the flow passage restricting portion is smaller than the cross-sectional area of the drain pipe.
In the present invention configured as described above, the cross-sectional area of the flow restrictor of the outflow pipe is set to be smaller than the cross-sectional area of the drain pipe. Pressure loss occurs, the pressure in the sealed water chamber located upstream of the flow restrictor of the outflow pipe is increased, and the amount of wastewater flowing from the drain pipe into the sealed water chamber is transferred from the sealed water chamber to the outflow pipe. Since it exceeds the outflow of drained water, the sealed chamber becomes almost full. As a result, it is possible to suppress the generation of negative pressure in the vicinity of the outlet portion of the overflow pipe located upstream from the outflow pipe, so that the smooth flow of the drainage in the drain trap is not impaired. An abnormal noise generated when air is drawn from the overflow pipe into the sealed water chamber by a negative pressure can be suppressed.

  According to the drain trap of the present invention, it is possible to suppress the generation of negative pressure that draws air from the overflow pipe into the drain trap without impairing the smooth flow of drainage, and to prevent abnormal noise generated by the air being drawn. Can be suppressed.

It is a schematic perspective view which shows the washstand in which the drain trap by one Embodiment of this invention was integrated in the inside. It is the schematic side view which fractured | ruptured partially the side surface of the wash basin in which the drain trap by one Embodiment of this invention was integrated. FIG. 3 is a cross-sectional view taken along line III-III in FIG. 2. It is a partial expanded side sectional view of the drain trap by one embodiment of the present invention. It is sectional drawing along the VV line of FIG.

Hereinafter, a drain trap according to an embodiment of the present invention will be described with reference to the accompanying drawings.
First, FIG. 1 is a schematic perspective view showing a washstand in which a drain trap according to an embodiment of the present invention is incorporated. Next, FIG. 2 is a schematic side view in which a side surface of a washstand in which a drain trap according to an embodiment of the present invention is incorporated is partially broken. FIG. 3 is a cross-sectional view taken along line III-III in FIG. FIG. 4 is a partially enlarged side sectional view of the drain trap according to the embodiment of the present invention. FIG. 5 is a cross-sectional view taken along the line VV in FIG. Moreover, in FIG.4 and FIG.5, the flow of the waste_water | drain is shown by the arrow.

As shown in FIGS. 1-5, the drain trap 1 of this embodiment is arrange | positioned in the accommodating part 6 located under the wash basin 4 of the wash basin 2 used as a water tank, and is drained from this wash basin 4. As shown in FIG. Water is discharged to the sewage side.
The drain trap 1 includes a drain pipe 8, a sealed water chamber 10, an overflow pipe 12, and an outflow pipe 14.

First, after the drain pipe 8 is connected to the drain port 4a of the wash basin 4 of the wash basin 2 at the upper end, which is the inlet, extends downward from the drain pipe 8 and is connected to the upper end 10a of the sealed water chamber 10, The outlet portion 8 a extends into the sealed water below the sealed surface W of the sealed water chamber 10, so that the drainage discharged from the drain 4 a of the basin 4 is guided into the sealed chamber 10 by the drain pipe 8. It has become. That is, the drain pipe 8 is connected to the sealed water chamber 10 so as not to protrude downward from the bottom of the sealed water chamber 10.
Further, the drain pipe 8 prevents the odor from rising in the basin 4 by blocking the odor from the sewage pipe 16 on the downstream side of the drain trap 1 by the sealing water in the sealing chamber 10. It is also called “deodorant tube” or “deodorant tube”.

  Next, as shown in FIGS. 2, 4, and 5, the sealed chamber 10 is formed inside a box whose planar cross section is a substantially oval shape elongated in the front-rear direction of the washstand 2, The sealed water that can close the outlet 8a of the drain pipe 8 is accommodated, and a drainage flow path is formed from the outlet 8a of the drain pipe 8 to the inlet 14a that is the upper end of the outflow pipe 14 that is located downstream thereof. doing.

Next, the inlet of the overflow pipe 12 is connected to the overflow port 4 b of the basin 4. The overflow port 4 b of the basin 4 is formed on the side surface of the basin 4, is located above the drain port 4 a of the basin 4, and limits the upper limit water level of the basin 4.
Further, the overflow pipe 12 is connected to the upper end portion 10a of the sealed water chamber 10 at a downstream middle portion thereof, and then the outlet portion 12a extends into the sealed water below the sealed surface W of the sealed water chamber 10. The waste water flowing out from the overflow port 4 b of the basin 4 is guided into the sealed water chamber 10 by the overflow pipe 12. That is, the overflow pipe 12 is connected to the sealed water chamber 10 so as not to protrude downward from the bottom of the sealed water chamber 10.

  Furthermore, the flow path 8b from the connection part of the drain pipe 8 and the upper end part 10a of the sealed water chamber 10 to the outlet part 8a of the drain pipe 8, and the connection part of the overflow pipe 12 and the upper end part 10a of the sealed water room 10 The flow path 12b from the outlet pipe 12 to the outlet section 12a of the overflow pipe 12 is connected to each other by the connecting flow path 18, and the outlet section 12a of the overflow pipe 12 is in the sealed water of the sealed water chamber 10 and the outlet section 8a of the drain pipe 8. It is located in the vicinity of the rear side.

In this embodiment, as an example, the flow path 8b from the connecting portion between the drain pipe 8 and the upper end portion 10a of the sealed water chamber 10 to the outlet portion 8a of the drain pipe 8, and the overflow pipe 12 and the sealed chamber 10 The flow path 12b from the connection portion with the upper end portion 10a to the outlet portion 12a of the overflow pipe 12 will be described with respect to the form in which the flow passages 12b are connected to each other by the connecting flow passage 18. The two flow paths 8b and 12b may be arranged independently of each other without being connected by the connection flow path 18 as long as they are located in the vicinity of each other in the sealed water.
In the present embodiment, after the overflow pipe 12 is connected to the upper end portion 10 a of the sealed water chamber 10, the outlet portion 12 a extends into the sealed water below the sealed surface W of the sealed water chamber 10. However, the present invention is not limited to such a form. For example, after the overflow pipe 12 is connected to the outer peripheral surface so as not to interfere with the outflow pipe 14 of the sealed water chamber 10, the outlet portion 12a is connected to the sealed water chamber. 10 may be directed so as to be located in the vicinity of the outlet portion 8a of the drain pipe 8 in the sealed water from the outer peripheral surface of the sealed water.
Alternatively, the overflow pipe 12 is connected to the drain pipe 8, which is a region having a relatively high internal pressure in the flow path of the drain trap 1, as in the sealed chamber 10, in addition to being connected to the upper end portion 10 a of the seal chamber 10. The outlet 12a of the overflow pipe 12 may be connected.

Next, the outflow pipe 14 has an inlet portion 14 a that is the upper end portion thereof connected to the sealed water chamber 10, and a lower end portion 14 b that is positioned below a predetermined length from the lower end of the sealed water chamber 10.
Further, the lower end portion 14 b of the outflow pipe 14 is connected to a connecting pipe 20 connected to the sewage pipe 16, and waste water overflowing from the sealed chamber 10 flows from the outflow pipe 14 through the connecting pipe 20 to the sewage pipe 16. To be guided to.

  Furthermore, the outflow pipe 14 is disposed so as to extend in the vertical direction on the rear end side of the sealed water chamber 10 (the portion corresponding to the right side end portion of the sealed water chamber 10 shown in FIGS. 4 and 5). A substantially crescent moon so that a cross section of the flow path 14c from a height position of a certain inlet portion 14a to a height position substantially equal to the lower end position of the sealed water chamber 10 surrounds a part of the outer periphery of the overflow pipe 12 in the sealed water chamber 10. It has a shape.

The outflow pipe 14 has a crescent-shaped cross-sectional area of the flow path 14 c smaller than the cross-sectional area of the flow path 8 b of the drain pipe 8, and a height position substantially equal to the lower end position of the sealed chamber 10 in the outflow pipe 14. Is set smaller than the cross-sectional area of the flow path 14d from the height position of the lower end portion 14b. In other words, the outflow pipe 14 is narrower than the flow path of the sealed chamber 10 and the drainage pipe 8 where at least a part of the flow path is located upstream, and the flow path 14d and the connection pipe 20 located downstream thereof. It is provided with a flow path 14c (flow path restricting portion) formed as described above.
In the present embodiment, as an example, a mode in which the flow path 14c of the flow path narrowing portion of the outflow pipe 14 is arranged so as to surround a part of the outer periphery of the overflow pipe 12 in the sealed water chamber 10 will be described. The flow restrictor of the outflow pipe 14 is not limited to such a form. If the inlet 14a of the outflow pipe 14 is connected to the sealed water chamber 10, the drain pipe 8 in the sealed water chamber 10 is connected. You may arrange | position so that a part of outer periphery may be surrounded.

Next, the operation of the drain trap according to the embodiment of the present invention described above will be described with reference to FIGS. 4 and 5 in particular.
The waste water that has flowed out from the drain 4 a of the basin 4 flows through the drain pipe 8 and flows into the sealed chamber 10 from the outlet 8 a of the drain pipe 8. The drainage in the vicinity of the outlet portion 8a of the drainage pipe 8 that has flowed into the sealed water chamber 10 collides with the inner wall of the sealed water chamber 10, and the outlet portion 8a of the drainage pipe 8, the connecting channel 18, And while flowing around the outside of the outlet part 12a of the overflow pipe 12, a flow in a predetermined direction (for example, upward) toward the inlet part 14a which is the upper end part of the outlet pipe 14 is formed. Drainage that has flowed into the outflow pipe 14 is drained into the sewage pipe 16 through the connecting pipe 20.

In addition, the outflow pipe 14 located on the downstream side of the sealed water chamber 10 has a flow path 14c (flow path constriction) formed so that at least a part of the flow path is throttled more than the flow path on the upstream side of the outflow pipe 14. Therefore, pressure loss occurs in the flow path 14c (flow path constriction section) of the outflow pipe 14 during drainage. As a result, the pressure in the sealed water chamber 10 located on the upstream side of the flow path 14c (flow path narrowing portion) of the outflow pipe 14 and the pressure in the drain pipe 8 connected to the upstream side of the sealed water chamber 10 are increased. At the same time, the inflow amount of the wastewater flowing from the drainage pipe 8 to the sealed water chamber 10 exceeds the outflow amount of the drainage flowing out from the sealed water chamber 10 to the outflow pipe 14, so that the sealed water chamber 10 becomes almost full.
In particular, in the vicinity of the outlet portion 12a of the overflow pipe 12 located in the sealed water of the sealed water chamber 10 located on the upstream side of the outflow pipe 14, the pressure in the sealed water chamber 10 is increased, so that the overflow pipe The generation of a force (negative pressure) for drawing air from 12 into the sealed water chamber 10 is suppressed. As a result, the smooth flow of the drainage of the drain trap 1 is not impaired, and noise generated by the air drawn into the sealed water chamber 10 from the overflow pipe 12 by such a negative pressure is reduced.

  According to the drain trap 1 according to the above-described embodiment of the present invention, the cross-sectional area of the flow path 14 c serving as the flow path restricting portion of the outflow pipe 14 is set to be smaller than the cross-sectional area of the flow path 8 b of the drain pipe 8. Since at least a part of the flow path of the outflow pipe 14 located on the downstream side of the sealed water chamber 10 is narrower than the flow path on the upstream side of the outflow pipe 14, It is possible to increase the pressure in the sealed water chamber 10 located on the upstream side of the flow path 14c (flow path narrowing portion) and the pressure in the drain pipe 8 connected to the upstream side of the sealed water chamber 10. As a result, the generation of force (negative pressure) for drawing air from the overflow pipe 12 into the sealed water chamber 10 can be suppressed, and the overflow pipe 12 can be prevented without impairing the smooth flow of drainage in the drain trap 1. The noise generated when air is drawn into the sealed water chamber 10 can be suppressed.

  Further, according to the drain trap 1 of the present embodiment, the flow restrictor (flow channel 14 c) of the outflow pipe 14 is formed so as to surround a part of the outer periphery of the overflow pipe 12 in the sealed water chamber 10. The space required for the sealed chamber 10 and the outflow pipe 14 can be reduced, and the space occupied by the drain trap 1 itself with respect to the entire storage space in the storage portion 6 formed below the wash basin 4 of the wash basin 2 can be reduced. can do. Therefore, the space around the drain trap 1 can be secured as an effective storage space for the storage unit 6 of the washstand 2 and can be used more effectively.

  In addition, in the drain trap by this embodiment mentioned above, although the example which applied the drain trap to the washstand used as a water tank was demonstrated, it is not limited to such an example, Aquariums, such as sinks and bathtubs other than a washstand It can be similarly applied to.

DESCRIPTION OF SYMBOLS 1 Drain trap 2 Wash basin 4 Wash basin 4a Drain port 4b Overflow port 6 Storage part 8 Drain pipe 8a Drain pipe outlet 10 Sealed chamber 10a Upper end of sealed water 12 Overflow pipe 12a Overflow pipe outlet 12b Flow path 14 Outflow pipe 14a Outlet pipe inlet 14b Lower end of outflow pipe 14c Flow path 14d Flow path 16 Sewage pipe 18 Connection flow path 20 Connection pipe W Sealing surface

Claims (2)

A drain trap provided below the water tank so that water drained from the water tank flows out to the sewage side,
A drain pipe connected to a drain outlet located below the aquarium and leading the drainage flowing out from the drain;
A sealed chamber that is connected to the drain pipe and forms a flow path for drainage from the drain pipe, and contains sealed water that can close an outlet portion of the drain pipe;
An outflow pipe connected to the sealed water chamber so as to guide waste water overflowing from the sealed water chamber to the sewer side;
An overflow pipe whose outlet is positioned upstream of the outflow pipe so as to guide drainage flowing out from an overflow opening opened above the water tank;
Have
The outlet pipe is provided with a passage aperture section formed so as to be squeezed from the upstream side of the flow path, the flow path aperture portion of this is formed so that its cross section is substantially crescent shape, A drainage trap formed so as to surround a part of the outer periphery of the drainage pipe or the overflow pipe inside the substantially crescent-shaped cross section .   The drain trap according to claim 1, wherein the outflow pipe is set so that a cross-sectional area of the flow passage restriction portion is smaller than a cross-sectional area of the drain pipe.

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