JP6944745B2 - Drain trap - Google Patents

Description

The present invention relates to a drain trap arranged on the downstream side of equipment such as a sink and a washbasin where drainage is generated by use.

Equipment such as sinks and wash basins generate drainage as they are used, and the drainage is discharged to the sewage side through drainage pipes connected to the equipment. In addition, a drain trap is installed in the drain pipe to prevent odors and pests from the downstream side from flowing back into the room. The drain trap is configured to store a part of the drainage that has flowed into the inside and fill a part of the drainage channel with the drainage to form a water sealing portion to prevent the backflow of the above-mentioned odor and pests.
The drain trap is known to have a structure in which a water sealing portion is formed by having a bent portion in which the pipe itself is bent into a substantially U shape. In addition, the drain trap in which the pipe itself is bent into a substantially U shape has a substantially S-shaped structure in which the downstream side of the water sealing portion is bent into a substantially U shape again and is connected to the underfloor pipe, and the water sealing portion. A substantially P-shaped structure is known in which the downstream side extends in a substantially horizontal direction and is connected to a pipe behind the wall of the room.

Here, since the drainage trap allows the drainage to pass through the inside and stores the drainage in the water sealing portion, dirt and slime easily adhere to the drainage flow path, which is unsanitary. Therefore, as a means for removing the adhering dirt and slime, a method of improving the self-cleaning property of the drain trap itself and a method of cleaning the inside using a cleaning tool are known.

The drain trap described in Patent Document 1 has a descending portion that hangs down from the inflow port, a bent portion that bends the pipe by about 180 degrees, and an ascending portion that is formed in the vertical direction from the bent portion, and is downstream from the water sealing portion. It is a substantially S-shaped drain trap with a piping portion on the side extending downward, and improves self-cleaning by utilizing the siphon phenomenon. The siphon phenomenon occurs when the drainage channel is filled with water, and the downstream side becomes negative pressure, so that the flow velocity of the drainage increases. The drainage trap described in Patent Document 1 is configured so that a siphon phenomenon is likely to occur by reducing the diameter of the pipe at the rising portion of the drainage flow path on the downstream side of the bent portion formed at the bottom, and drainage with an increased flow velocity. Therefore, it is difficult for dirt to adhere to the inside, and even if dirt is attached, it is possible to remove the attached dirt by the drainage that flows vigorously when the siphon phenomenon occurs.

On the other hand, as an instrument for cleaning the inside of the drainage pipe, a cleaning instrument as described in Patent Document 2 is known. The cleaning tool is hose-shaped and has a nozzle for injecting high-pressure water at the tip.
When cleaning the drainage pipe, the inner surface of the drainage pipe can be washed away by inserting the tip of the cleaning device through the drainage port and directly injecting high-pressure water inside the drainage pipe to dirt or slime. ..

JP 2015-098702 Japanese Unexamined Patent Publication No. 2016-138407

As described above, the drain trap described in Patent Document 1 has a part of the drainage channel reduced in diameter in order to cause a siphon phenomenon, but if the siphon phenomenon does not occur, the drainage flow rate becomes worse. I had the problem of getting rid of it. Further, there is a problem that dirt is easily clogged in the reduced diameter portion.
On the other hand, the above-mentioned cleaning equipment has a limited shape of the drain trap that can be used, and when it is used for a drain trap having a substantially S shape, the nozzle cannot bend the bent portion of the substantially U shape, and cleaning can be performed. Sometimes I couldn't. In particular, when the descending portion and the ascending portion are vertically provided as in the drain trap described in Patent Document 1, the cleaning tool must be bent by about 180 degrees at the bent portion, and the water sealing portion of the drain trap. It was difficult to insert into the subsequent ones. Further, since Patent Document 1 is a substantially S-shaped trap in which the downstream side of the water sealing portion hangs down, in order to insert the cleaning instrument to the lower end of the drain trap, the cleaning instrument is bent again by about 180 degrees at the upper end of the ascending portion. It was very difficult to insert the cleaning equipment to the end because the cleaning equipment broke inside the drain trap.

The present invention has been invented in view of the above problems, and an object of the present invention is to provide a drain trap that enables a siphon phenomenon to occur with a small amount of drainage and enables a cleaning tool to be used.

The present invention according to claim 1 is a drain trap that forms a water-sealing portion by bending a pipe body into a substantially U-shape.
A continuous inlet from the drain and
The downhill part where the flow path descends from the inflow port to the downstream side,
The ascending part where the flow path rises upward and
A bent part formed by connecting the down part and the up part and bending the flow path,
Equipped with a water seal that stores wastewater and forms a water seal
In the drainage flow path between the seal water top end from the inlet, have a portion where the area is gradually reduced,
The drainage trap is characterized in that the area of the drainage channel at the bent portion is smaller than that of the inflow port, and the area of the drainage channel at the upper end of the water sealing portion is smaller than that of the bent portion.

The area of the drainage channel refers to the area of the surface perpendicular to the flow direction of the drainage. Further, "the drainage flow path between the inflow port and the upper end of the water sealing portion has a portion whose area gradually shrinks" is not limited to the structure in which the drainage flow path constantly shrinks, and is not limited to the structure from the inflow port. It may have a portion where the area of the drainage flow path to the upper end of the water sealing portion is partially the same. That is, it is sufficient that the area of the drainage channel is not expanded from the inflow port to the upper end of the water sealing portion, and the area of the drainage channel may be gradually reduced, and the area of the drainage channel may be gradually reduced. You may.

The drainage trap according to claim 1, wherein the down portion and the up portion are inclined with respect to the vertical direction.

According to the third aspect of the present invention, the drain trap is connected to an equipment in which drainage is generated by use.
The above equipment has a storage space inside and
The drain trap according to claim 1 or 2 , wherein the drain trap is arranged along the wall surface of the storage space.

According to the first aspect of the present invention, the siphon phenomenon can be easily generated even with a small drainage flow rate, dirt is less likely to adhere to the inside of the drainage flow path, and the drainage flowing inside the drainage flow path makes it difficult for dirt to adhere to the inside. Adhering dirt can be washed away.
According to the second aspect of the present invention, the cleaning tool can be easily inserted into the inside, and the cleaning property is improved.
According to the third aspect of the present invention, even if the width of the drain trap in the horizontal direction is increased, the storage space is not pressed.

It is sectional drawing which shows the construction state of the drainage trap of this invention. It is a top view which shows the sink where the drain trap is attached. It is sectional drawing which shows the drainage trap. It is a reference figure which shows the state of performing cleaning using a cleaning instrument.

Hereinafter, the valve member of the present invention will be described with reference to the drawings. It should be noted that the description described below facilitates the understanding of the embodiments, and is not intended to limit and understand the present invention. Further, in the following embodiments, up, down, left and right will be described with reference to the construction state shown in FIG. 1 unless otherwise specified.

As shown in FIGS. 1 to 3, the drain trap 3 of the present embodiment is connected to a sink K as an equipment for which drainage is generated by use.

The sink K has a tank body S attached to the upper side and has a storage space inside, and a drawer (not shown) capable of storing seasonings and the like is arranged in the storage space.

The tank body S is a box body having an opening at the upper side, and as shown in FIG. 2, has a cylindrical recessed portion on the back side and near the left corner in a plan view, and a circular shape formed on the bottom surface of the depressed portion. A drainer 1 is attached to the opening of.

As shown in FIG. 3, the drainer 1 has a cylindrical body portion 12 whose upper end is open so as to function as a drain port 11, and a flange portion 13 is projected outward from the upper end of the body portion 12. ing. Further, the body portion 12 has a male screw formed on the outer periphery thereof, and is screwed with the female screw of the nut 2 arranged on the back side of the tank body S. Further, the drainage device 1 has a drainage flow path formed inside, and a drainage port 14 is formed obliquely downward from the bottom surface thereof.
The flange portion 13 is formed over the entire circumference of the upper end of the drainage device 1, and its outer diameter is larger than the circular opening formed in the tank body S, and hits the peripheral edge of the opening via packing. It is in contact with each other, and the peripheral edge of the opening is sandwiched between the flange portion 13 and the nut 2.
The discharge port 14 has a cylindrical shape that is inclined downward at an angle of about 35 degrees with respect to the vertical direction, and the inflow port 31 of the drain trap 3 is watertightly connected via a nut and packing. Further, the discharge port 14 is arranged so as to be parallel to the back surface of the sink K.

The drain trap 3 is a drain trap having a substantially S-shaped side view formed by bending a cylindrical pipe, and has an inflow port 31, a first descending portion 32, a first bent portion 33, an ascending portion 34, and a third. A second descending portion 35 and a second bent portion 36 are provided, and a water sealing portion 37 for storing drainage and forming a sealing water is formed therein. Further, the drain trap 3 is arranged so as to be parallel to the back surface of the sink K. That is, in the present embodiment, as shown in FIG. 2, the drain trap 3 is arranged so that the upstream side thereof is the left back corner of the tank body S and the downstream side faces the right back corner.
The inflow port 31 is an upstream end of the drain trap 3 and is connected to the discharge port 14 of the drain device 1. As will be described later, the end of the inflow port 31 is formed so that the flow path area is the largest among the drainage flow paths of the drainage trap 3.
The first descending portion 32 is a straight tubular drainage flow path continuous from the inflow port 31, and is extended so as to be inclined downward at an angle of about 35 degrees with respect to the vertical direction. Therefore, in the first descending portion 32, the flow path descends toward the downstream side.
The first bent portion 33 is a bent portion of a substantially U-shaped drain trap 3 that connects the first down portion 32 and the up portion 34.
The ascending portion 34 is a straight tubular drainage flow path continuous from the first bent portion 33, and is extended so as to be inclined upward at an angle of about 45 degrees with respect to the vertical direction. Therefore, in the ascending portion 34, the flow path rises toward the downstream side. As described above, since the first descending portion 32 is inclined with an angle of about 35 degrees, the angle formed by the straight portion between the first descending portion 32 and the ascending portion 34 is about 80 degrees. There is.
The second bent portion 36 is a substantially U-shaped bent portion connecting the upper end of the ascending portion 34 and the second descending portion 35, and is formed so as to bend the drainage flow path by about 45 degrees and hang down the second descending portion 35. There is. The drain trap 3 in the present embodiment is configured so that the area of the drain flow path is minimized at the second bent portion 36.
The second descending portion 35 is a drainage pipe that hangs down from the second bent portion 36, and is connected to an underfloor pipe (not shown) at the end thereof via a hose pipe 4 that is a pipe on the downstream side.
The water sealing portion 37 is a portion that forms a sealing water in the drain trap 3, and refers to a portion from the upper surface of the first bent portion 33 to the bottom surface of the second bent portion. In the embodiment, the wastewater is stored at a height from the bottom surface of the first bent portion 33 to the bottom surface of the second bent portion 36, but among the stored drainage, the one that functions as a sealing water is used. The drainage is stored between the upper surface of the first bent portion 33 and the bottom surface of the second bent portion 36, and the height and width of the portion that functions as the sealing water is referred to as the sealing depth. That is, when the water surface of the stored drainage is lower than the upper surface of the first bent portion 33, a space through which odors and pests can pass is formed between the stored drainage and the upper surface of the first bent portion 33. It will not be possible to fulfill the function of preventing backflow. In the present embodiment, with respect to the distance between the upper surface of the first bent portion 33 and the bottom surface of the second bent portion 36, the vertical distance H (sealing depth) between the two points is about 50 mm. The horizontal distance L is about 92 mm, and the horizontal distance is longer than the sealing depth.

In the drain trap 3, the first bent portion 33 and the second bent portion 36 are not provided with cleaning ports in order to smooth the inner surface of the drainage flow path. As a result, when the cleaning tool described later is used, the cleaning tool can easily pass through the first bent portion 33 and the second bent portion 36.

Further, in the drain trap 3, the area of the drain flow path is gradually reduced from the inflow port 31 to the upper end of the water sealing portion 37, that is, from the second bent portion 36. More specifically, as shown in FIG. 2, at the inflow port 31, the inner diameter R1 is about 34 mm, but the drainage flow path does not form a step portion or the like as it advances to the downstream side of the first descending portion 32. The area of the drainage channel is smoothly reduced, and the inner diameter R2 of the first bent portion 33 becomes about 30 mm. Then, at the lower end of the ascending portion 34, that is, at the second bent portion 36, the inner diameter R3 of the drainage flow path becomes the minimum of about 16 mm, and after the second bent portion 36, the second bent portion 36 and thereafter are connected to the downstream pipe with the same diameter as the inner diameter R3. NS. Therefore, in the present embodiment, the area ratio of the drainage channel at the inflow port 31 to the area of the drainage channel at the upper end of the water sealing portion 37 is 17: 8, that is, about 2: 1. The "area of the drainage channel" refers to the area of the surface perpendicular to the flow direction of the drainage.

Here, the drainer 1 is arranged near the left corner on the back side of the tank body S in a plan view, and the drain trap 3 is arranged so as to be substantially parallel to the back surface of the sink K. As a result, in the drain trap 3 of the present invention, the first descending portion 32 and the ascending portion 34 are inclined with respect to the vertical direction, but do not interfere with the drawer arranged in the storage space inside the sink K.

The flow of drainage in the drain trap 3 of the present invention is as follows.

First, when drainage (hot water, etc.) is discharged into the tank body S by using the sink K, the drainage flows into the drainage device 1 from the drainage port 11, and enters the drainage trap 3 from the inflow port 31 through the discharge port 14. Drainage flows in. The drainage flowing in from the inflow port 31 passes through the first descending portion 32, flows downward in the drainage flow path at an angle of about 35 degrees with respect to the vertical direction, and the flow direction is about about 35 at the first bent portion 33. It is refracted by 80 degrees and flows in the ascending portion 34. Then, the drainage that has reached the upper end of the ascending portion 34 is bent by about 45 degrees, hangs down in the second descending portion 35, and is discharged to the drainage pipe further downstream than the hose pipe 4.

As described above, in the drain trap 3 of the present invention, the area of the drain flow path gradually decreases as it advances from the inflow port 31 to the downstream side. Therefore, in the above drainage flow, the flow velocity of the drainage flowing in from the inflow port 31 gradually increases due to the Venturi effect, and even if the amount of drainage flowing in the drainage flow path is small, the inside of the drainage pipe is easily filled. This makes it possible and the siphon phenomenon is likely to occur.

When the above siphon phenomenon occurs, the downstream side of the drainage pipe is in a negative pressure state, so that the flow velocity in the drainage pipe increases, and it becomes possible to wash away dirt and slime adhering to the inside of the drainage flow path. , Self-cleaning is improved.

Next, cleaning of the drain trap 3 of the present invention using the cleaning device 5 will be described.

As shown in FIG. 4, the cleaning instrument 5 has a flexible hollow tube shape, a nozzle 51 is attached to one end, and the other end is connected to a water source (not shown). A plurality of small holes are opened in the nozzle 51, and it is possible to inject the cleaning water flowing into the cleaning instrument 5 from the small holes at a high pressure.
When cleaning the drain trap 3 using the cleaning device 5, the nozzle 51 is inserted into the drain trap 3 through the discharge port 14 of the drain device 1 while injecting the cleaning water at a high pressure. When the insertion is continued, the nozzle 51 reaches the first bent portion 33 through the inflow port 31 and the first descending portion 32. When the cleaning tool 5 reaches the first bent portion 33, the nozzle 51 comes into contact with the bottom surface of the first bent portion 33. At this time, the first descending portion 32 is at an angle of about 35 degrees with respect to the vertical direction. Since the nozzle 51 is inclined downward, the nozzle 51 can easily slide on the bottom surface of the first bent portion 33, and the tip of the nozzle 51 bends toward the ascending portion 34. Then, when the insertion is further continued, the cleaning instrument 5 passes through the ascending portion 34 and reaches the second bent portion 36. When the cleaning tool 5 reaches the bent portion 34, the nozzle 51 comes into contact with the upper surface of the second bent portion 36, but the ascending portion 34 is inclined upward at an angle of about 45 degrees with respect to the vertical direction. Therefore, the nozzle 51 can be easily slid on the upper surface of the second bent portion 36, and the tip of the nozzle 51 is bent toward the second descending portion 35. Then, since the cleaning tool 5 in which the nozzle 51 is arranged on the downstream side of the second bent portion 36 can be inserted into the hose pipe 4 through the second descending portion 35, the inside of the drain trap 3 can be completely cleaned. ..

The drain trap 3 of the present invention is configured such that the area of the internal drainage channel gradually decreases from the inflow port 31 toward the downstream side. Therefore, even if the drainage flow rate is small, the siphon phenomenon can be easily generated, and dirt is less likely to adhere to the inside. Etc. can be washed away. Further, since the flow path area is formed so as to gradually shrink without having a step portion, it is possible to prevent the occurrence of turbulent flow inside and to smoothly drain the inflowing drainage. Therefore, it is possible to prevent dirt from accumulating at a specific location, and the first descending portion 32 and the second descending portion 35 are inclined at angles of about 35 degrees and about 45 degrees with respect to the vertical direction, respectively. Therefore, when the nozzle 51 comes into contact with the first bent portion 33 and the second bent portion 36, the cleaning tool 5 can be easily bent.
Therefore, the drain trap 3 of the present invention is more hygienic than the conventional drain trap because the siphon phenomenon is used to improve the self-cleaning property of the drain trap 3 and the internal cleaning by the cleaning tool 5 becomes possible. Is.
Further, since the drain trap 3 is arranged so as to be substantially parallel to the back surface of the sink K, it does not press the storage space inside the sink K and is arranged without interfering with the drawer arranged in the storage space. be able to.

Further, in the drain trap 3 of the present invention, the area of the drainage channel at the first bent portion 33 is smaller than that of the inflow port 31, and the area of the drainage channel at the upper end of the water sealing portion 37 is the first bent portion. It is smaller than 33. That is, the area of the drainage channel is the inflow port 31> the first bent portion 33> the ascending portion 34> the upper end of the water sealing portion 37. In addition to this, if the diameter is not increased in the middle portion, the wastewater that has flowed in due to the siphon phenomenon can be smoothly discharged. However, it is not always necessary for the drainage flow path to continue to shrink from the inflow port 31 to the upper end of the water sealing portion 37. It may have been done. That is, the area of the drainage channel may be gradually reduced or may be gradually reduced.

Although the embodiment of the present invention is as described above, the drain trap 3 of the present invention is not limited to the shape in the above embodiment, and various design changes can be made without departing from the gist of the invention. For example, in the above embodiment, the drainage device 1 is arranged in the back left corner of the tank body S in a plan view, and the discharge port 14 is arranged so as to face the right side, but the back side right of the tank body S. It may be arranged in a corner and the discharge port 14 may be arranged so as to face left along the back surface of the sink K. Further, the discharge port 14 may be arranged so as to face the front side along the side surface of the sink K. That is, by arranging the drain trap 3 of the present invention along the wall surface of the sink K, it is possible to arrange the drain trap 3 below the tank body S without pressing the storage space.
Further, in the above embodiment, the drain trap 3 is installed in the drain pipe through which the drainage generated from the sink K as the equipment flows, but is installed in the drain pipe through which the drain from the tub or the wash basin as the equipment flows. However, its use is not limited. Further, the dimensions related to the inner diameter, the sealing depth, and the like of the drain trap 3 in the above embodiment can be appropriately changed according to the equipment to be installed and the drain pipe. The above embodiment is a substantially S-shaped drain trap provided with two substantially U-shaped bent portions, but the downstream side from the water sealing portion is extended in a substantially horizontal direction, and the back of the wall of the room. It may be a substantially P-shaped drain trap connected to the pipe.

1 Drainer 11 Drainage port 12 Body part 13 Flange part 14 Discharge port 2 Nut 3 Drainage trap 31 Inflow port 32 First down part 33 First bend part 34 Up part 35 Second down part 36 Second bend part 37 Water sealing part 4 Hose pipe 5 Cleaning equipment 51 Nozzle K Sink S Tank body

Claims (3)

A drain trap that forms a water-sealing part by bending the pipe body into a substantially U-shape.
A continuous inlet from the drain and
The downhill part where the flow path descends from the inflow port to the downstream side,
The ascending part where the flow path rises upward and
A bent part formed by connecting the down part and the up part and bending the flow path,
Equipped with a water seal that stores wastewater and forms a water seal
In the drainage flow path between the seal water top end from the inlet, have a portion where the area is gradually reduced,
A drain trap characterized in that the area of the drainage channel at the bent portion is smaller than that of the inflow port, and the area of the drainage channel at the upper end of the water sealing portion is smaller than that of the bent portion. The drain trap according to claim 1, wherein the down portion and the up portion are inclined with respect to the vertical direction. The drain trap is connected to equipment that produces drainage due to use.
The above equipment has a storage space inside and
The drain trap according to claim 1 or 2 , wherein the drain trap is arranged along the wall surface of the storage space.

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