JP6371945B2 - Drain trap - Google Patents

Description

  The present invention relates to a drain trap connected to a downstream side such as a sink or a washstand.

In conventional drainage pipes, drainage generated from equipment such as a wash basin and a sink is discharged through a drain trap into a horizontal pipe arranged under the floor. In order to prevent clogging in the piping, the horizontal pipe is provided with a gradient greater than a predetermined value. While maintaining the above gradient, the horizontal pipe is connected to the merging pipe at an angle close to a right angle, and the drainage is further downstream. It has a structure to discharge.
In the conventional drainage pipe, the horizontal pipe is always arranged with a gradient, so that it is necessary to take a large pipe space under the floor.

Therefore, in recent years, as described in Patent Document 1, a drainage pipe called a siphon drainage pipe has been devised instead of the conventional drainage pipe. Siphon drainage pipe is a drainage system that uses the siphon phenomenon. After a horizontal pulling pipe with a smaller diameter than conventional drainage pipes is installed without any gradient, it is connected to a merge pipe via a vertical pipe that hangs down a predetermined length. It has a structure.
The siphon drainage pipe can drain with a stronger force than conventional drainage pipes by draining using negative pressure due to the drop energy generated in the drooping part of the vertical pipe. Construction is possible even when the space under the floor is small because the pull pipe is non-gradient.
However, siphon drainage pipes increase the flow rate when negative pressure is generated, and it is possible to process wastewater strongly. However, it takes time until the negative pressure is generated, and the pipe is non-gradient and has a small diameter. Before pressure generation, there is a problem that the wastewater treatment capacity is extremely small.

  Therefore, a negative pressure can be generated more quickly by connecting a drain trap with a narrow water passage area in part of the flow path so that the siphon phenomenon tends to occur. It becomes possible to solve the problem which has.

  For example, the drain trap described in Patent Document 2 reduces the diameter of a part of the vicinity of the inlet of the drain trap, thereby narrowing the water flow area and facilitating the siphon phenomenon.

  However, the drain trap formed by reducing the diameter of a part of the pipe body like the drain trap described in Patent Document 2 is likely to accumulate dirt on the reduced diameter portion, and clogging occurs in the reduced diameter portion. It was easy to occur. Moreover, since the structure described in Patent Document 2 has a reduced diameter on the upstream side of the drain trap, if the reduced diameter portion is clogged, the pipe must be disassembled once in order to perform cleaning.

  The clogging was conspicuous when a device called a disposer, called a disposer, was connected upstream of the drain trap.

JP 2011-147878 A JP 2006-316472 A

  In view of the above problems, the present invention relates to a drain trap connected to a siphon drain pipe, and preferably provides a drain trap having a siphon phenomenon and improved cleanability when clogging occurs in a pipe. Objective.

The present invention according to claim 1 for solving the above-mentioned problem is a drainage trap for forming sealed water inside,
A descending portion where the flow path descends toward the downstream side,
An ascending portion where the flow path rises upward,
It consists of a bent part that connects the descending part and the ascending part and is formed by bending the flow path,
The rising portion is a drain trap characterized in that the diameter of the rising portion is reduced over the entire circumference at the rising portion from the bent portion, and the water passage area is narrowed.

  The “bending” is not necessarily limited to the circular arc shape, and may be a square shape having apexes. The “rising part” refers to a part that starts to rise from the bent part.

  The present invention according to claim 2 is the drain trap according to claim 1, wherein a cleaning port is provided in the bent portion.

  The present invention described in claim 3 is the drain trap according to claim 1 or 2, wherein the water passing area remains narrower from the rising portion to the downstream end.

  The present invention described in claim 4 is characterized in that the drain trap forms a descending portion, an ascending portion, and a bent portion by bending the tubular body into a substantially U shape. It is a drainage trap as described in any one of these.

The present invention described in claim 5 is the drain trap according to any one of claims 2 to 4, wherein the cleaning port is provided immediately below the rising portion.

  The present invention according to claim 6 is the drain trap according to any one of claims 1 to 5, wherein the drain trap is attached to a sink or a sink.

  The present invention according to claim 7 is the drain trap according to claim 6, which is attached to the downstream side of the disposer.

According to the first aspect of the present invention, since the water passage area is narrow at the rising portion from the bent portion, the drainage decelerated at the bent portion is accelerated at the rising portion, causing unevenness in the flow velocity. Therefore, it is possible to cause the siphon phenomenon to occur appropriately.
According to the second aspect of the present invention, when clogging or the like occurs in a portion where the water passage area is narrow, the inside of the drain trap can be easily cleaned from the cleaning port.
According to the third aspect of the present invention, it is possible to stabilize the drainage flow rate by preventing the occurrence of turbulence and the like, and it is possible to prevent clogging other than the portion where the water passage area is narrow.
According to this invention of Claim 4 and Claim 5, a diameter-reduced part adjoins to a cleaning port, and cleaning property improves.
According to this invention of Claim 6 and Claim 7, it is possible to clarify the attachment location of the drain trap of this invention.

It is the schematic which shows the whole structure of the siphon drain pipe which concerns on this invention. It is sectional drawing which shows this invention. (A) It is A-A 'sectional drawing of FIG. (B) It is B-B 'sectional drawing of FIG. It is a side view of a drain trap. It is sectional drawing which shows 2nd embodiment of this invention. It is sectional drawing which shows 3rd embodiment of this invention. It is sectional drawing which shows 4th embodiment of this invention.

  Hereinafter, the drain trap 1 of the present invention will be described with reference to the drawings. The following description is for facilitating understanding of the embodiment, and the present invention is not limited and understood by this. In the following embodiments, the upper, lower, left and right directions will be described with reference to the state shown in FIG.

  As shown in FIG. 1, the siphon drain pipe 11 in which the drain trap 1 of the present embodiment is disposed includes a tank body S, a disposer 17, a drain trap 1, a straight pipe 12, a horizontal pipe 13, a vertical pipe 14, and a junction pipe 16. It is made up of.

  The tank body S is a sink that is a facility device in which drainage and dredging are generated when used, and a drainage port for discharging drainage and dredging is opened at the bottom.

  The disposer 17 is attached to the drain of the tank body S and has a function of finely crushing the soot that has entered the inside. Further, the disposer 17 is connected to the drain trap 1 on the downstream side thereof, and the soot crushed by the disposer 17 is discharged to the drain trap 1 together with the drain water flowing into the disposer 17.

  The drain trap 1 is a drain trap called an S-shaped drain trap formed by bending a pipe body. It forms a sealed water inside, and has the effect of preventing the invasion of odors and pests from the downstream side. Have.

  The horizontal pipe 13 is disposed downstream of the drain trap 1 and substantially horizontally below the floor F. In other words, the horizontal pulling tube 13 in the present invention has almost no gradient. Further, the horizontal pipe 13 has a smaller diameter than the conventional horizontal pipe.

  The vertical pipe 14 is provided continuously with the horizontal drawing pipe 13 and hangs down by a predetermined length. Moreover, the vertical pipe 14 is connected to the merging pipe 16 via the merging joint 15 at the lower end thereof, so that the internal drainage and soot can be further drained to the sewage side. The diameter of the vertical tube 14 is the same as the diameter of the horizontal pulling tube 13.

  The merge pipe 16 is a pipe having a larger diameter than the horizontal draw pipe 13 and the vertical pipe 14, and is provided so as to penetrate the building up and down. As described above, the junction pipe 16 is connected to the drainage flow path from the tank body S as a sink, but is also connected to the drainage flow path from the tank body S as another sink (not shown), and is not shown on the downstream side. It is connected to the septic tank.

Here, the structure of the drain trap 1 will be described in detail with reference to FIGS. In addition, in the side view shown in FIG. 4, description of the drainage flow path and nut connected with the drain trap 1, the cap body 5, the vent valve 9, etc. is abbreviate | omitted in order to make an understanding of invention easy.
The drain trap 1 of the present invention includes a first descending portion 2, a first bent portion 3, a cleaning port 4, an ascending portion 6, a second bent portion 7, a vent port 8, and a second descending portion 10. The drain trap 1 is a substantially S-shaped drain trap formed by bending a pipe body at the first bent portion 3 and the second bent portion 7 by about 180 °.

  The first descending part 2 is a drainage channel formed by lowering the pipe body toward the most upstream side of the drain trap 1 and connected to the drainage channel from the disposer 17. Yes. The first descending portion 2 is bent from the lower end thereof and is continuous with the first bent portion 3. Since the first descending portion 2 is inserted with a continuous pipe from the disposer 17, the end portion is slightly enlarged in diameter, but when connected to the disposer 17, the first descending portion 2 and the first descending portion 2 are connected to the first descending portion 2. The inner surface of the portion 2 is flush with the surface.

The first bent portion 3 is formed by bending a tubular body into a substantially U shape at about 180 °, and connects the first descending portion 2 and an ascending portion 6 described later and has a cleaning port 4. The cleaning port 4 is an opening provided at the bottom of the first bent portion 3, and is suspended toward the outside of the drain trap 1, and has a male screw portion on the outer periphery thereof, and the cap body 5 by the male screw portion. Are screwed together. The cleaning port 4 is screwed in a watertight manner with the cap body 5, and no water leaks from the cleaning port 4 in the screwed state.
The first bent portion 3 is formed so that a bend radius R2 with an ascending portion 6 described later is smaller than a bend radius R1 with the first descending portion 2.

  The ascending portion 6 is a drainage channel formed by raising the pipe body from the upstream side to the downstream side of the drain trap 1, rising from the first bent portion 3 and continuing to the second bent portion 7. Yes. In addition, the ascending portion 6 has a narrow water passage area due to a gradually reduced diameter from a rising portion from the first bent portion 3 (a portion that starts to rise) to a height position of about 1/3 of the ascending portion 6. Due to the reduced diameter, the tube diameter is about 2/3 to 3/4 of the first descending portion 2. As shown in FIG. 3, the diameter-reduced portion changes from an ellipse to a circle, and the diameter is not always reduced as a circle, an ellipse, or a flat shape. In addition, the water flow area after the ascending portion 6 remains narrow until reaching the lower end of the drain trap 1. The diameters of the horizontal pulling pipe 13 and the vertical pipe 14 connected to the drain trap 1 are the same as the diameter of the lower end of the drain trap 1. That is, all the pipes from the ascending portion 6 to the merging pipe 16 have the same diameter, and the water flow area is also substantially the same.

  Here, the distance d2 between the central axis Y3 of the ascending portion 6 and the central axis Y2 of the cleaning port 4 is formed smaller than the distance d1 between the central axis Y1 of the first descending portion 2 and the central axis 2 of the cleaning port 4. ing. Therefore, the ascending portion 6 is disposed closer to the cleaning port 4 than the first descending portion 2, and about half of the flow path of the ascending portion 6 is disposed immediately above the cleaning port 4.

  The second bent portion 7 is formed by bending a tubular body into a substantially U shape at about 180 °, and connects the ascending portion 6 and a second descending portion 10 described later, and has a vent hole 8. The vent 8 is an opening provided on the upper surface of the second bent portion 7, is suspended toward the outside of the drain trap 1, has a male screw portion on the outer periphery thereof, and the vent valve 9 is provided by the male screw portion. Are screwed together. In addition, the side surface of the flow path side edge part protrudes, and the vent hole 8 has narrowed the flow path. The vent valve 9 has a check valve inside, and opens when a negative pressure is generated in the drain trap 1 to allow air to flow into the drain trap 1. When it occurs, it is closed so that the air inside the drain trap 1 or drainage is prevented from flowing out.

  The second descending portion 10 is a drainage channel that is continuous from the end of the second bent portion 7 and is formed by lowering the pipe body toward the downstream side, and is laterally pulled through the straight pipe 12 at the lower end. It is connected to the tube 13. The second descending portion 10 has a slightly enlarged diameter because the straight pipe 12 is inserted therein, but when connected to the straight pipe 12, the inner surfaces of the second descending portion 10 and the straight pipe 12 are Consecutive and continuous.

  The drain trap 1 can store drainage in the space between the bottom surface of the first bent portion 3 and the bottom surface of the second bent portion 7 when drainage flows with use of equipment. . And since the drainage channel is obstruct | occluded by the waste_water | drain in the part where the said waste_water | drain was stored, it can prevent that an odor and a pest penetrate | invade indoors from a downstream side. The drainage water stored in the drainage trap 1 is called “sealed water”, and the drainage trap having a structure that prevents odors and pests from entering by the sealed water is called “sealed water type drainage trap”.

  The siphon drain pipe 11 including the drain trap 1 discharges drainage or soot according to the following flow.

  Drainage generated by the use of the tank body S passes through the disposer 17 from a drain outlet provided at the bottom of the tank body S and is discharged into the drain trap 1. The soot generated by using the tank body S is finely pulverized by operating the disposer 17 and discharged into the drain trap 1 together with the drainage.

Next, the drainage and soot flowing into the drain trap 1 pass through the first descending portion 2, the first bent portion 3, the ascending portion 6, the second bent portion 7, and the second descending portion 10, and through the straight pipe 12. It is discharged to the horizontal pulling tube 13.
At this time, since the rising portion 6 is reduced in diameter from the rising portion from the first bent portion 3, the flow velocity is increased from the reduced diameter portion and the inside of the pipe is filled with drainage (and soot). Siphon phenomenon occurs. Accordingly, a negative pressure is generated in the drain trap 1 so that the drain is drawn downstream, and the flow rate of the drain is further increased.

Next, the waste water is discharged into the junction pipe 16 through the horizontal drawing pipe 13 and the vertical pipe 14.
At this time, the drainage can generate a negative pressure more strongly by the dropping energy when the drainage hangs down the vertical pipe 14, and the drainage can be drawn downstream. For this reason, even if the horizontal pulling pipe 13 is non-gradient, the drainage can be discharged without any problem.

  The siphon drain pipe 11 generates a negative pressure strongly and discharges the waste water. However, since the drain trap 1 includes the vent valve 9, no negative pressure is generated excessively. Therefore, the sealed water in the drain trap 1 does not flow out at the end of drainage, nor does a loud pull-in sound (a “gobogobo” sound generated when the sealed water is drawn near the end of drainage).

Here, since the drainage trap 1 has a narrow water passage area in the reduced diameter portion, clogging is likely to occur due to accumulation of dirt in the reduced diameter portion. In particular, when the siphon drain pipe includes the disposer 17 as in the first embodiment, pulverized soot is mixed in the waste water, and clogging is likely to occur remarkably.
However, since the drain trap 1 of the present invention is reduced in diameter from the rising portion of the rising portion 6 and the cleaning port 4 is disposed immediately below the reduced diameter portion, even if clogging occurs, the cleaning port 4 It is possible to easily eliminate clogging.

  Further, as described above, in the drain trap 1 of the present invention, the bending radius R2 between the first bent portion 3 and the rising portion 6 described later is smaller than the bending radius R1 between the first bent portion 3 and the first falling portion 2. As the up part 6 is arranged closer to the cleaning port 4 than the first down part 2 and about half of the flow path of the up part 6 is arranged directly above the cleaning port 4, The clogged portion can be easily cleaned from the cleaning port 4. Furthermore, by arranging the ascending 6 closer to the cleaning port 4 than the first descending portion 2, it is possible to save space in the horizontal direction.

  The flow path of the drain trap 1 is always circular except for the reduced diameter portion. Therefore, since the drainage channel always maintains a constant shape, turbulent flow is less likely to occur, and dirt accumulation and clogging of the drainage channel are less likely to occur at portions other than the reduced diameter portion.

  Next, a drain trap 1 according to the second embodiment of the present invention will be described with reference to FIG. Since the second embodiment is the same as the first embodiment except for the portion related to the drain trap 1, only the portion related to the drain trap 1 will be described, and the description of other pipes will be omitted.

The drain trap 1 according to the second embodiment is a substantially P-shaped drain trap formed by bending about 180 ° at a bent portion 31, and includes a descending portion 21, a bent portion 31, a cleaning port 4, and an ascending portion 6. , The vent 8 and the horizontal tube portion 18.
The drain trap 1 according to the second embodiment is formed by connecting a U-shaped tube 19 and an L-shaped tube 20.

  The descending part 21 is a drainage channel formed by lowering the pipe body toward the downstream side, which is the most upstream side of the drainage trap 1, and is connected to a drainage channel from a disposer 17 (not shown). . Further, the descending portion 21 is bent from the lower end thereof and continues to the bent portion 31. In addition, since the descending part 21 inserts a continuous pipe from the disposer 17 into the inside, the end part is slightly enlarged in diameter, but when connected to the disposer 17, the pipe from the disposer 17 and the inner surface of the descending part 21 Are continuous.

The bent portion 31 is formed by bending a tubular body into a substantially U shape at about 180 °, and connects the descending portion 21 and an ascending portion 6 described later and has a cleaning port 4. The cleaning port 4 is an opening provided at the bottom of the bent portion 31, is obliquely provided toward the upstream side outside the drain trap 1, has a male screw portion on the outer periphery thereof, and the male screw portion. Is screwed into the cap body 5. The cleaning port 4 is screwed in a watertight manner with the cap body 5, and no water leaks from the cleaning port 4 in the screwed state.
Further, the bending portion 31 is formed so that a bending radius R4 with the ascending portion 6 described later is smaller than a bending radius R3 with the descending portion 21.

  The ascending portion 6 is a drainage channel formed by raising the pipe body from the upstream side to the downstream side of the drain trap 1 and rises from the bent portion 31 and is continuous with the horizontal pipe portion 18. In addition, the ascending portion 6 has a narrow water passage area due to a gradually reduced diameter from a rising portion from the bent portion 31 (a portion that starts to rise) to a height position of about 1/3 of the ascending portion 6, and the reduced diameter. Therefore, the tube diameter is about 2/3 to 3/4 of the first descending portion 2. The reduced diameter portion is an ellipse to a circle as in the first embodiment, and the diameter is not always reduced as a circle, an ellipse, or a flat shape. In addition, the water flow area after the ascending portion 6 remains narrow until reaching the lower end of the drain trap 1. Further, the diameters of the horizontal pulling pipe 13 and the vertical pipe 14 (not shown) connected to the drain trap 1 are the same as the diameter of the lower end of the drain trap 1. That is, all the pipes from the ascending portion 6 to the merging pipe 16 have the same diameter, and the water flow area is also substantially the same.

  Here, since the cleaning port 4 is obliquely provided at the bottom of the bent portion 31, the cleaning port 4 opens toward the reduced diameter portion of the ascending portion 6.

  The horizontal pipe portion 18 is bent by about 90 ° from the ascending portion 6 and extends substantially in the horizontal direction. In addition, the horizontal pipe part 18 bends about 90 degrees downward from the end part, and is connected to the horizontal pipe 13 (not shown). Further, the horizontal tube portion 18 has a vent hole 8. The vent 8 is an opening provided on the upper surface of the horizontal pipe portion 18 and is suspended toward the outside of the drain trap 1 and has a male screw portion on the outer periphery thereof. It is screwed. In addition, the side surface of the flow path side edge part protrudes, and the vent hole 8 has narrowed the flow path. The vent valve 9 has a check valve inside, and opens when a negative pressure is generated in the drain trap 1 to allow air to flow into the drain trap 1. When it occurs, it is closed so that the air inside the drain trap 1 or drainage is prevented from flowing out.

  Since the drain trap 1 according to the second embodiment is provided with the cleaning port 4 inclined, the cleaning port 4 opens toward the reduced diameter portion, so that the cleaning property is further improved.

  The second embodiment of the present invention is as described above. However, the present invention is not limited to the shapes of the first and second embodiments, and can be appropriately changed without departing from the gist of the invention.

  For example, although the cleaning port 4 of the first embodiment is suspended from the first bent portion 3, even if it is a substantially S-shaped drain trap 1 as in the third embodiment shown in FIG. The cleaning port 4 may be provided obliquely like the drain trap 1 according to the second embodiment. By doing in this way, the operation | work of the cleaning port 4 does not interfere with the 2nd descent | fall part 10, and a cleaning operation becomes easy.

  Further, a lubricating coating such as a water repellent coating or a hydrophilic coating may be applied to the inner surface of the drain trap 1. In this case, it is possible to prevent dirt from accumulating inside the drain trap 1. In addition, since it is useful to coat a reduced diameter portion where dirt is particularly likely to accumulate during coating, the coating may be applied only after the reduced diameter portion. That is, in the drain trap 1 according to the second embodiment, the coating may be applied only to the inside of the L-shaped tube 20.

  In each of the above embodiments, the bent portions 31 are bent in an arc shape, but may be bent in a square shape having a vertex.

  In each embodiment, the diameter of the reduced diameter portion is reduced while the ellipse is circular. However, the diameter may be always reduced as a circle, an ellipse, or a flat shape.

  In each embodiment, the water passage area is always narrower downstream than the rising portion, but the water passage area may be narrowed only in the rising portion.

  Further, the present invention is not a structure that can be adopted only for an S-shaped drain trap or a P-shaped drain trap formed by bending a pipe body. That is, the bottle-type drain trap shown in FIG. 7 may be employed as the drain trap 1, and the structure of the present invention can be employed in drain traps 1 of various shapes such as trap traps and reverse trap traps. is there.

DESCRIPTION OF SYMBOLS 1 Drain trap 2 1st descent | fall part 21 Descent | fall part 3 1st bending part 31 Bending part 4 Cleaning port 5 Cap body 6 Up part 7 2nd bending part 8 Ventilation hole 9 Venting valve 10 Second descent part 11 Siphon drain pipe 12 Directly Pipe 13 Horizontally drawn pipe 14 Vertical pipe 15 Merge joint 16 Merge pipe 17 Disposer 18 Horizontal pipe part 19 U-shaped pipe 20 L-shaped pipe S Tank F Floor surface Y1, Y2, Y3 Center axes d1, d2 Distance

Claims (7)

A drain trap that forms a sealed water inside,
A descending portion where the flow path descends toward the downstream side,
An ascending portion where the flow path rises upward,
It consists of a bent part that connects the descending part and the ascending part and is formed by bending the flow path,
The drain trap, wherein the rising portion is reduced in diameter over the entire circumference at a rising portion from the bent portion, and the water passage area is narrowed. The drain trap according to claim 1, wherein a cleaning port is provided in the bent portion. The drainage trap according to claim 1 or 2, wherein the water passage area remains narrower from the rising portion to the downstream end. The drain trap according to any one of claims 1 to 3, wherein the drain trap forms a descending portion, an ascending portion, and a bent portion by bending the pipe body into a substantially U shape. . The drainage trap according to any one of claims 2 to 4, wherein the cleaning port is provided immediately below the rising portion. The drain trap according to any one of claims 1 to 5, wherein the drain trap is attached to a sink or a sink. The drain trap according to claim 6, wherein the drain trap is attached to a downstream side of the disposer.

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