JP6682070B2 - Drainage equipment piping structure - Google Patents

Description

  The present invention relates to the piping structure of a drainage device, in which the drainage from the drainage device is joined with the fluid from the branch pipe, and more specifically, in the above drainage pipe, when a reverse flow of the drainage occurs, in what direction The present invention relates to a piping structure of a drainage device, which is provided with a joint member that prevents backflow drainage from entering a branch pipe portion connected to a branch pipe pipe.

BACKGROUND ART Conventionally, a drainage pipe structure for discharging the drainage of a device (hereinafter referred to as “drainage device”) that produces drainage by use, such as a washbasin, a sink, and an electric water heater, to the sewer side is known. As a pipe of this drainage pipe structure, a structure is known in which the drainage from a plurality of drainage devices is combined and discharged to the downstream side.
Hereinafter, a conventional example of a pipe structure in which the drainages from the plurality of drainage devices are combined and discharged to the sewage side will be described.

The piping structure of the drainage device described in Patent Document 1 is for treating the drainage of a plurality of drainage devices including a sink as the first drainage device and an electric water heater as the drainage device on the branch pipe side. It is a thing.
Here, an electric water heater as a drainage device will be described.
The conventional electric water heater described in Patent Document 1 is an electric water heater that heats feed water by electricity to generate hot water, which is used for spouting a wash basin or sink. Since electric water heaters such as washbasins and sinks need to be able to immediately discharge hot water as needed during normal times, a water storage tank is provided inside the water heater to heat the water tank once. After the water is supplied at a natural temperature, the water in the water storage tank is preheated to an appropriate temperature, and hot water can be immediately discharged as needed.
As described above, the electric water heater is originally a device on the water supply side, but drainage occurs due to various reasons.
For example, as described above, when the water supply in the water storage tank is heated, the water supply in the water storage tank expands due to the rise in the water temperature, and the amount of water supply in the water storage tank may exceed the allowable amount of the water storage tank. Yes, water that exceeds the allowable amount must be discharged as wastewater.
Further, if the water supply in the water supply tank is left unused for a long time, there is a possibility that bacteria and the like will propagate, which makes it less hygienic. Therefore, there is an electric water heater or the like configured to discharge all the water supply in the water storage tank after a certain period of time and store the water supply again.
In this way, drainage may occur even in the electric water heater, but since the faucet is a device for the user to discharge water as needed, the drainage described above is treated as water discharge not intended by the user. It cannot be discharged from the faucet. In addition, since the main side of the water supply is constantly pressurized, further backflowing the water in the water storage tank to the main side has problems such as unsanitary conditions. It is not possible to discharge the wastewater from the main water supply side.
Therefore, in an electric water heater that produces drainage when used, a drainage pipe for treating the drainage is separately provided, and the drainage is discharged from this drainage pipe to the sewer side. This drainage pipe corresponds to the branch pipe in the conventional example.

  As described above, the electric water heater itself is originally a device on the water supply side that discharges water supply from the faucet, and the drainage generated from the electric water heater is `` water supply '' unless it is released to the atmosphere, but here, `` From the water supply tank of the electric water heater, it is treated as drainage when it is discharged to the pipe side toward the drainage pipe so that it can be treated by the drainage pipe. That is, the electric water heater is a “drainage device” because it is a “device that supplies water to the faucet and the like” and a “device that produces drainage” to the drainage pipe. In the following description, the electric water heater will be described as a “drainage device”.

The drainage pipe structure described in Patent Document 1 is for treating the drainage of a plurality of drainage devices including a sink as a first drainage device and an electric water heater as a second drainage device. It is composed of a drain trap for a sink, an upstream pipe, a drain trap for an electric water heater, a joint member, a check valve, and a downstream pipe, which are described below.
The drain trap used for the sink, which is the first drainage device, is a member that is attached to the sink of the drainage device at the upper end and has a drainage port through which the drainage in the sink flows, and at the lower end, the drainage from the drainage port. It also has a discharge port for discharging wastewater, and a drainage pool is provided inside the drainage pool to form a part that is always full on the drainage flow path. It is configured to prevent backflow of pests and insects to the upstream side (indoor side).
The upstream pipe is a pipe connecting the drain trap of the sink and a joint member described later, and the drain trap of the sink and the upstream pipe form a main drain pipe.
The drainage trap used in the piping of the electric water heater, which is the second drainage device, has an inlet at the upper end through which the drainage from the electric water heater flows in via the piping member, and a side surface that discharges the drainage from the above-mentioned inlet. It is equipped with an outflow port for drainage, and a drainage puddle is provided inside it to form a part that is always full on the drainage flow path by using this puddle, which collects odors and pests. It is configured to prevent backflow to the upstream side (electric water heater side).
As described above, the branch pipe is formed by the piping member that connects the electric water heater and the drain trap of the electric water heater.
The drainage joint is composed of a tubular main body that extends in the vertical direction, and a branch pipe portion that is inclined obliquely upward from the side surface of the main body toward the outside. The downstream end of the joint member is provided with a downstream pipe body which is a linear pipe body for discharging the drainage that has passed through the joint member to the underfloor pipe.
The upper end of the main body is connected to the outlet of the drain trap on the drainage device side via the upstream pipe, and the lower end is connected to the pipe connected to the underfloor pipe via the downstream pipe.
The branch pipe portion is connected to the outlet of the drain trap of the electric water heater.
The branch pipe portion is configured such that a part thereof projects into the vertical pipe portion, and an upper end of the vertical pipe portion side end of the branch pipe portion is located below a lower end of an outer end portion of the branch pipe portion. Become.
The check valve is a member that is placed at the outlet of the drain trap of the electric water heater, is normally closed, and opens only when drainage from the electric water heater side to the branch pipe side occurs and the drain It is configured to allow passage.
The reason why the check valve is used in the pipe will be described below. The electric water heater is also a device on the water supply side, and when it is directly connected to the drainage pipe that discharges wastewater, if a backflow from the sewage side occurs, the pipe of the electric water heater on the water supply side will flow back from the sewage side. May be contaminated by. For this reason, by placing a check valve between the drain trap of the electric water heater and the joint member, it is possible to prevent the backflow of drainage from the sewage side from directly flowing into the pipe on the water supply side, and the water supply pipe is contaminated with the drainage. I'm trying to avoid it.

Each member configured as described above is constructed as follows.
First, connect the drain trap of the drainage device to the opening for attaching the drainage trap provided in the drainage device. In this case, the drain port of the drain trap of the drainage device should be opened above the drainage device through the opening of the drainage device.
Next, the upper end of the upstream pipe is connected to the outlet of the drain trap of the drainage device, and the upper end of the joint member is connected to the lower end of the upstream pipe.
Next, the lower end of the joint member and the underfloor pipe are connected via the downstream pipe body.
Next, the pipe is connected so that the drainage of the electric water heater is discharged to the inlet of the drain trap of the electric water heater.
Further, after placing a check valve at the outlet of the drain trap of the electric water heater, connect the branch pipe part of the joint member to the outlet of the drain trap of the electric water heater (that is, the check valve The drainage pipe of the drainage trap is installed so that it touches both the outlet of the drainage trap and the branch pipe), and the drainage pipe of the first drainage device and the electric water heater of the second drainage device are completed. To do.

When the sink and the electric water heater having the drainage pipe configured as described above generate drainage by use, the generated drainage is discharged to the sewer side as follows.
When drainage occurs due to use in the sink, the drainage passes through the drainage port of the sink, the drain trap of the sink, the upstream pipe body, the main body of the joint member, and the downstream pipe body in this order. It is discharged from the underfloor piping to the sewage side.
When drainage occurs from the electric water heater, the drainage water from the electric water heater flows from the drain pipe through the drain trap of the electric water heater to the check valve, the branch pipe portion of the joint member, the main body portion of the joint member, and the downstream side. After passing through the pipe, it is finally discharged from the underfloor pipe to the sewage side.

In addition, if the drainage flows backward from the underfloor piping on the sewage side, or if a large amount of drainage occurs from the drainage equipment and the discharge of the drainage to the underfloor piping via the drainage piping cannot catch up, the branch pipe side The drainage may try to flow back (or in). However, in the joint member described in Patent Document 1, the branch pipe portion is provided with a slant toward the upper side as it goes outward, and a part thereof projects into the vertical pipe portion, so that the branch pipe portion has a vertical length. The upper end of the end portion on the pipe portion side is configured to be located below the lower end of the outer end portion of the branch pipe portion. Further, the open side end of the branch pipe portion (the side connected to the outlet of the drain trap of the electric water heater) is provided with a check valve that is normally closed.
With such a configuration, the air in the branch pipe portion does not vent to the drain trap side of the electric water heater by the check valve, and remains in the branch pipe portion to form an air pool.
Due to this air pool, drainage does not enter the position of the check valve.
For this reason, the backflow drainage does not reach the water supply side pipes such as the drain trap and drain pipe of the electric water heater, and the water storage tank of the electric water heater. No longer touches the drainage from the drainage pipe, which makes it possible to use the equipment on the electric water heater side rather than the check valve in a very hygienic manner.

JP, 2011-158113, A

In the case of the drainage piping structure described in Patent Document 1 as described above, there are problems as described below.
There are various cases of drainage equipment piping layouts. As described in Patent Document 1, the tubular shaft of the main body of the joint member is not only piped vertically but also horizontally. (Hereinafter, "when piping the cylindrical shaft of the main unit in the vertical direction" is "vertical installation", "Piping the cylindrical shaft of the main unit in the horizontal direction""Whendoing" is described as "horizontal placement"). However, when the joint member is horizontally installed, the branch pipe portion is not inclined with respect to the vertical direction. For this reason, even if a backflow occurs in the drainage, the air accumulation due to the inclination does not occur in the branch pipe portion, and the backflowed drainage reaches the check valve. Since the check valve of the branch pipe is normally closed, the drainage that has flowed back to the electric water heater side does not proceed to the electric water heater side than the check valve, but the check valve can be opened by touching the check valve. Since it becomes dirty, there is a problem that it is unsanitary for the piping of the electric water heater which is also a water supply device. The above problem is remarkable when the second drainage device is also a water supply device such as an electric water heater. However, even when the second drainage device also does not function as a water supply device, the backflow prevention drain touches the backflow drainage. This causes problems. Specifically, dust and hair in the drainage is entangled in the movable part of the check valve, the check valve does not operate normally, and the check valve does not open when draining from upstream to downstream, On the contrary, there is a problem that the normally closed check valve does not operate in the open state, and the check flow passes through the check valve and flows further upstream.
The present invention has been made in view of the above problems, and in the piping structure of drainage equipment, even if the joint member is piped vertically or horizontally, an air pool is formed in the branch pipe portion without any problem, and the reverse flow is generated. Is prevented from entering the branch pipe side of the joint member, and the backflow prevention valve is prevented from touching the backflow drainage.

The present invention according to claim 1 is a piping structure of a drainage device for treating drainage from a drainage device, the drainage device, a drainage main pipe for discharging the drainage of the drainage device, and a branch pipe through which a fluid passes. And the upstream end is connected to the drainage main pipe, the downstream end is connected to the sewer pipe, and a joint provided with a branch pipe portion arranged in a substantially horizontal direction connected to the branch pipe A member and a pipe provided from the branch pipe to the branch pipe of the joint member, which is normally closed and opens only when the fluid moves from the branch pipe side to the branch pipe side. In the piping structure of drainage equipment consisting of a check valve that allows the passage of
Inside the joint member, provided on the inner side surface of the main body portion, the upstream end is connected to the inner side surface of the main body portion at a position upstream of the opening of the connection portion with the main body portion of the branch pipe portion, The downstream end portion is opened downstream from the opening of the connection portion with the main body portion of the branch pipe portion, and within the main body portion, up to the downstream open position, including the connection portion with the branch pipe portion, of the main body portion. It is divided into a region that does not include the upstream end portion and a region that includes the connection portion with the upstream side of the main body portion and does not include the connection portion with the branch pipe portion, and the main body portion and the branch pipe portion are arranged in a substantially horizontal direction The drainage pipe structure is characterized in that the drain wall has a storage wall in which the highest position of the downstream end is lower than the opening of the connection point with the branch pipe section.

  According to a second aspect of the present invention, in the piping structure of the drainage device, the branch pipe is a drainage pipe different from the drainage device connected to the drainage main pipe, and the drainage trap is further provided on the branch pipe. The piping structure of the drainage device according to paragraph 0011, further comprising:

  According to a third aspect of the present invention, in the piping structure of the drainage device, the drainage device connected to the branch pipe is an electric water heater as the drainage device, in paragraph 0011 or paragraph 0012. It is the piping structure of the drainage device described.

  According to a fourth aspect of the present invention, in the piping structure for the drainage device, the storage wall is connected to an inner surface of the main body portion along the axial direction of the tubular main body portion, paragraphs 0011 to 0011. The piping structure of the drainage device according to any one of paragraphs 0013.

  According to a fifth aspect of the present invention, in the piping structure of the drainage device, the storage wall has a substantially funnel shape, and the upstream end of the storage wall is on the inner surface of the tubular main body of the joint member. The drainage pipe structure according to any one of paragraphs 0011 to 0013, wherein the pipe structure is connected over the entire circumference.

The present invention as set forth in claim 6 is characterized in that the storage wall is configured separately from the other part formed of the main body part and the branch pipe part of the joint member, and is any one of paragraphs 0011 to 0015. It is the piping structure of the drainage device described in one.

  The present invention according to claim 7 is characterized in that the branch pipe portion is connected to the main body portion of the joint member at a position above the central axis of the main body portion when the main body portion is arranged in a substantially horizontal direction. The piping structure of the drainage device according to any one of paragraphs 0011 to 0016.

  According to the present invention of claim 8, in the piping structure of the drainage device, when the joint member is arranged in a substantially horizontal direction, at least the pipe on the downstream side of the joint member is downwardly lowered in order to perform natural drainage. The piping structure for the drainage device according to any one of paragraphs 0011 to 0017 is characterized in that the piping is directed toward the end.

In the present invention as set forth in claim 1, inside the main body of the joint member, up to the open position on the downstream side, the connecting portion with the branch pipe portion is included and the upstream end portion of the main body portion is not included inside the joint member. The highest position of the downstream end when the main body is arranged in a substantially horizontal direction while being divided into a region and a region that includes the connection with the upstream side of the main body and does not include the connection with the branch pipe. Is equipped with a storage wall at a position lower than the opening at the connection between the main body part and the branch pipe part, and with a check valve that is always closed on the branch pipe part side and opens only when draining. Not only when the member is placed vertically, but also when it is placed horizontally, an air pool is formed in the branch pipe portion when the drainage flows backward, and the drainage flowing back to the check valve is no longer touched.
According to the present invention described in claims 2 and 8, the piping layout of the piping structure of the drainage device can be clarified.
In the present invention according to claim 3, the configuration of the device on the side of the branch pipe can be clarified.
In the present invention described in claims 4 to 6, the specific structure of the joint member of the present invention can be clarified.
In the present invention as set forth in claim 7, the joint member is configured such that the connection point between the main body portion and the branch pipe portion of the joint member is the upper end position of the main body portion when the joint member is placed horizontally. Can be easily configured so that the highest position of the downstream end of the storage wall is lower than the position of the opening at the connection point with the branch pipe section when the storage container is placed horizontally.

It is a reference drawing showing the 1st construction example of the 1st example of the present invention. It is sectional drawing which shows the construction state from the side surface direction of FIG. It is a front view of the joint member of the first example of the present invention at the time of vertical installation. It is sectional drawing which shows the state which the backflow generate | occur | produced of the Example of FIG. It is a bottom view in FIG. 3 of the joint member of 1st Example. FIG. 4 is a sectional view taken along the line aa of the joint member of FIG. 3. FIG. 4 is a cross-sectional view taken along the line bb of the joint member of FIG. 3. It is a reference drawing explaining the field of the joint member of a 1st example. It is a perspective view of the joint member of a 1st example. It is sectional drawing which shows the principal part of the 1st construction example of 1st Example. It is sectional drawing which shows the principal part at the time of reverse flow of the 1st construction example of 1st Example. It is sectional drawing which shows the construction state from the side surface direction of the 2nd construction example of 1st Example. It is sectional drawing which shows the principal part of the 2nd construction example of 1st Example. It is sectional drawing which shows the principal part at the time of reverse flow of the 2nd construction example of 1st Example. It is sectional drawing which shows the Example of the joint member which made the storage wall the funnel shape of this invention. It is sectional drawing which shows the principal part of the construction example which vertically installed the joint member of FIG. It is sectional drawing which shows the principal part at the time of reverse flow of the construction example which installed the joint member of FIG. 15 vertically. It is sectional drawing which shows the principal part of the construction example which laid the joint member of FIG. 15 horizontally. It is sectional drawing which shows the principal part at the time of reverse flow of the construction example which laid the joint member of FIG. 15 horizontally. It is sectional drawing which shows the Example of the joint member which made the lower end of the storage wall the inclined surface of this invention.

The first embodiment of the present invention will be described below.
In addition, in this embodiment, the joint member 1 having the same shape is used, and the vertical direction in which the central axis of the main body portion 1a of the joint member 1 is vertically arranged at the time of construction, and the horizontally arranged horizontally. In the following, the configuration of the joint member 1 of the present embodiment will be described below, and as a first construction example, the central axis of the main body portion 1a of the joint member 1 is arranged in the vertical direction during the construction. The case of vertical installation will be described as a second example of the case of horizontal installation in which the central axis of the main body 1a of the joint member 1 is horizontally arranged during the installation.

Hereinafter, the joint member 1 according to the first embodiment of the present invention will be described with reference to the drawings.
The joint member 1 of the present invention shown in FIGS. 3 to 9 includes a main body 1a made of a tubular body having a substantially cylindrical shape, and a cylindrical branch extending in a horizontal direction from a side surface of the main body 1a. It is composed of a tube portion 1b. The branch pipe portion 1b and the main body portion 1a are connected in a tangential direction from the upper end portion of the circular shape to the main body portion 1a which has a circular shape as viewed in the axial direction of the main body portion 1a when vertically and horizontally placed. , Extended horizontally. That is, the branch pipe portion 1b is configured to be connected to the main body portion 1a of the joint member 1 at a position above the central axis of the main body portion 1a when the main body portion 1a is arranged vertically and horizontally. Become.
Here, the direction in which the branch pipe portion 1b extends is referred to as the horizontal direction, even if the central axis of the main body portion 1a of the joint member 1 is vertically arranged at the time of completion of the construction, even if it is placed vertically. This is because the branch pipe portion 1b is arranged in a state of being extended in the horizontal direction even in the case of horizontal placement arranged in the direction. Further, as a matter of course, the tubular main body portion 1a and the branch pipe portion 1b communicate with each other inside.
In addition, a storage wall 2 for partitioning the inside of the joint member 1 is provided inside the joint member 1.
The storage wall 2 will be described in detail. The storage wall 2 is a wall surface provided on the inner side surface of the main body 1a, and the storage wall 2 of the present embodiment is arranged along the upstream to the downstream direction of the tubular main body 1a. A plate-shaped portion 2a connected to the inner surface of the main body portion 1a, and a fan-shaped portion 2b closing a portion between the main body portion 1a and the branch pipe portion 1b.
With the storage wall 2 configured in this way, the inside of the main body portion 1a of the joint member 1 reaches the open position on the downstream side of the storage wall 2, as shown in FIG. Including a connection portion with the upstream side of the main body portion 1a and a connection portion with the branch pipe portion 1b. It is divided into a non-existing region (region indicated by “B” in FIG. 7).
The "downstream opening position of the storage wall 2" refers to the position closest to the upstream side of the downstream end of the storage wall 2. When the lower end of the storage wall 2 is formed by a surface perpendicular to the axis of the main body 1a forming the cylinder as in the joint member 1 of the first embodiment, the entire downstream end of the storage wall 2 is It is the "end on the downstream side closest to the upstream side".
In addition, “a region where the storage wall 2 includes the connection portion with the branch pipe portion 1b and does not include the upstream end portion of the main body portion 1a in the main body portion 1a up to the downstream open position. The partitioning into a region that includes the connection portion with the upstream side and does not include the upstream end of the main body portion 1a "includes the above-described" open position on the downstream side of the storage wall 2 "and When a vertical surface is assumed (hereinafter, this assumed surface is referred to as “a surface formed by the lower end of the storage wall 2”), the upstream side of the “surface formed by the lower end of the storage wall 2” inside the joint member 1 is A main body including a region including a connection portion with the branch pipe portion 1b and not including an upstream end portion of the main body portion 1a, and a connection portion with an upstream side of the main body portion 1a by a surface formed by the wall 2 and the lower end of the storage wall 2 It means that it is divided into a region that does not include the upstream end of the portion 1a.
Further, in the joint member 1, as shown in FIGS. 13 to 14, when the joint member 1 is laid horizontally, the highest position of the downstream end of the storage wall 2 is the branch pipe portion 1b. It is configured to be located at a position lower than the opening of the connection point (in the joint member 1 of the present embodiment, the downstream end of the storage wall 2 has the same height when horizontally placed, The entire downstream end of the storage wall 2 is the "highest position of the downstream end of the storage wall 2)".

Among the construction examples of the joint member 1 of the first embodiment using the joint member 1 described in the above paragraph 0022, a construction example in which the joint member 1 is placed vertically as a first construction example will be described below with reference to the drawings. It will be described with reference.
In the piping structure showing the first construction example shown in FIGS. 1 to 11 in the first embodiment of the present invention, the drainage equipment for draining water in the drainage main pipe among the drainage equipment that produces drainage by use. And a water heater D as a drainage device for draining water through the branch pipe 5, and these drainage pipes are the joint member 1 described in the above paragraph 0022 and the following. The drain trap KT of the sink, the upstream pipe body 4, the drain trap DT of the electric water heater, the check valve 3 and the downstream pipe body 6.
The drainage trap KT of the sink used for the sink K is a member whose upper end is attached to the sink of the drainage device, has a drainage port through which the drainage in the sink flows, and discharges the drainage from the drainage port at the lower end. In addition, a drainage reservoir is provided inside the drainage outlet, and the drainage passage is used to form a portion that is always full of water in the drainage flow path. Is configured to prevent backflow to the upstream side (indoor side).
The upstream pipe 4 is a straight pipe that connects the drain trap KT of the sink and the joint member 1 described later, and the drain trap KT of the sink and the upstream pipe 4 form a main drain pipe. .
The drain trap DT of the electric water heater used for the piping of the electric water heater D has an inlet at the upper end through which the drain water from the electric water heater D flows, and a side surface at which the drain water is discharged. It is equipped with an outflow port for drainage, and a drainage puddle is provided inside it to form a part that is always full on the drainage flow path by using this puddle, which collects odors and pests. It is configured to prevent backflow to the upstream side (electric water heater D side).
A branch pipe 5 is formed by a pipe including the pipe from the electric water heater D and the drain trap DT of the electric water heater described above.
The check valve 3 is a member arranged at the outlet of the drain trap DT of the electric water heater, is normally closed, and is opened only when drainage from the electric water heater D side to the branch pipe portion 1b side occurs. And is configured to allow passage of drainage.
The downstream pipe body 6 is a pipe body made of a straight pipe, and an upstream end portion thereof is connected to a lower end of the joint member 1 and a downstream end portion thereof is connected to an underfloor pipe connected to the sewer side.

Each member configured as described above is constructed as follows.
First, the drain trap KT of the sink is connected to the drain trap mounting opening provided in the sink K. In this case, the drain port of the drain trap K of the sink is made to open on the sink of the sink K through the opening of the sink K.
Next, the joint member 1 is placed vertically, that is, the axis of the main pipe portion of the joint member 1 is oriented vertically, and the upper end of the upstream pipe body 4 is connected to the discharge port of the drain trap KT of the sink. Further, the upper end of the joint member 1 is connected to the lower end of the upstream pipe body 4, respectively.
Next, the lower end of the joint member 1 and the underfloor pipe are connected via the downstream pipe body 6 having a straight pipe shape.
Next, the pipe of the electric water heater D is connected to the inflow port of the drain trap DT of the electric water heater.
Furthermore, after arranging the check valve 3 at the outlet of the drain trap DT of the electric water heater, the branch pipe portion 1b of the joint member 1 is connected to the outlet of the drain trap DT of the electric water heater. The construction of the drainage pipe in the first construction example of the sink K as the drainage equipment and the electric water heater D as the second drainage equipment is completed.

When the sink K and the electric water heater D having the drainage pipe configured as described above generate drainage by use, the generated drainage is discharged to the sewer side as follows.
When drainage is generated by using the sink K, the drainage is discharged from the drainage opening of the sink K through the drainage trap KT of the sink, the upstream pipe body 4, the main body portion 1a of the joint member 1, and the downstream pipe body 6. , And then finally discharged from the underfloor piping to the sewage side.
When drainage is generated from the electric water heater D, the drainage water from the electric water heater D flows from the pipe of the electric water heater D through the drain trap DT of the electric water heater, the check valve 3 and the branch pipe portion of the joint member 1. 1b, the main body portion 1a of the joint member 1, and the downstream pipe body 6 in this order, and finally discharged from the underfloor pipe to the sewer side.

Further, there is a case where the drainage flows back from the underfloor piping on the sewage side, or a large amount of drainage occurs from the drainage device, and the drainage tends to flow back (or flow into) the branch pipe portion 1b side of the joint member 1.
However, inside the vertically arranged joint member 1 of the first construction example of the first embodiment, the storage wall 2 forms an air reservoir in the branch pipe portion 1b, and the backflow drainage enters the branch pipe. It is configured to prevent this.
More specifically, the interior of the vertically arranged joint member 1 of the first construction example of the first embodiment is provided by the storage wall 2 up to the open position on the downstream side of the storage wall 2 and the branch pipe portion 1b and the branch. Partitioned into a region that includes the connection portion with the pipe portion 1b and does not include the upstream end of the main body portion 1a, and a region that includes the connection portion with the upstream side of the main body portion 1a and does not include the upstream end portion of the main body portion 1a. Has been done.
By providing the check valve 3 which is normally closed at the end portion of the branch pipe portion 1b, the upstream end portion of the main body portion 1a including the branch pipe portion 1b and the connection portion with the branch pipe portion 1b is provided. Air does not escape to the upstream side (electric water heater D side) from the area that does not include air, and the air does not flow to the area that includes the branch pipe portion 1b and the connection portion with the branch pipe portion 1b and does not include the upstream end of the main body portion 1a. A puddle is formed.
Due to this air accumulation, drainage does not enter the branch pipe portion 1b or the position of the check valve 3 on the upstream side of the branch pipe portion 1b.
Therefore, the backflow drainage does not reach the piping on the water supply side such as the drain trap DT of the electric water heater or the water storage tank of the electric water heater D, and the backflow is prevented by the air pool in the branch pipe portion 1b. Since the valve 3 does not touch the drainage from the drainage pipe, it becomes possible to use the device on the electric water heater D side of the check valve 3 in an extremely hygienic manner.

Next, of the construction examples of the joint member 1 of the first embodiment using the joint member 1 described in the above paragraph 0022, a construction example in which the joint member 1 is vertically placed as a second construction example is shown in the drawings. It will be described with reference.
Of the first embodiment of the present invention, in the piping structure showing the second construction example shown in FIGS. 12 to 14, as the drainage device for producing the drainage by use, the drainage device for treating the drainage by the drainage main pipe 4. And a water heater D as a drainage device for treating drainage by the branch pipe 5, and these drainage pipes are the joint member 1 described in the above paragraph 0022 and the following. It comprises the drain trap KT of the sink, the upstream pipe body 4, the drain trap DT of the electric water heater, the check valve 3 and the downstream pipe body 6 which are described.
Of these, members other than the upstream pipe body 4 and the downstream pipe body 6 are omitted because they have the same configurations as the members of the first construction example described in paragraph 0023, and the upstream pipe body 4 and The configuration of the downstream pipe body 6 will be described below.
The upstream pipe body 4 is a pipe body that connects the drainage trap KT of the sink and the joint member 1 and is provided with a portion that bends approximately 90 degrees in the middle, and the drainage trap KT of the sink and the upstream pipe body 4 are connected to each other. To form the main drainage pipe.
The downstream pipe 6 is a pipe provided with a portion that bends approximately 90 degrees in the middle, and an upstream end is a lower end of the joint member 1, and a downstream end is an underfloor pipe connected to the sewer side. , Each connected.
Here, regarding the upstream side pipe body 4 and the downstream side pipe body 6, the bending angle of the bent portion is set to "approximately" 90 degrees, in fact, because of natural drainage, the portion is piped in the lateral direction. This is because a downward gradient of about 1.2 degrees is set for the angle, so that the bending angle is not exactly 90 degrees.

Each member configured as described above is constructed as follows.
First, connect the drain trap of the drainage device to the opening for attaching the drainage trap provided in the drainage device. In this case, the drain port of the drain trap of the drainage device should be opened above the drainage device through the opening of the drainage device.
Next, the joint member 1 is placed horizontally, that is, the axis of the main body 1a of the joint member 1 is oriented in the horizontal direction, and the upper end of the upstream pipe body 4 is connected to the discharge port of the drain trap KT of the sink. Further, the upstream end of the joint member 1 is connected to the downstream end of the upstream pipe body 4, respectively. As described in paragraph 0027, the upstream pipe body 4 is provided with a portion that bends approximately 90 degrees in the middle, so if it is connected to the lower end of the drain trap KT of the sink that faces downward, it is substantially horizontal at the bending portion. The direction is changed in the direction, and it is possible to match and connect to the upstream end of the main body 1a of the joint member 1 placed horizontally.
Next, the downstream end of the joint member 1 and the underfloor pipe are connected via the downstream pipe 6. As described above, the joint member 1 is laid horizontally, and by connecting the downstream side pipe body 6 provided with a portion that bends approximately 90 degrees in the middle, the lower end of the downstream side pipe body 6 faces downward, and sewage It can be connected to the underfloor piping connected to the side.
As described in paragraph 0027, a slight downward slope (about 1.2 degrees) for drainage is actually provided in the substantially horizontal portion of the downstream pipe body 6. That is, the substantially horizontal portion of the downstream pipe body 6 is a pipe that extends downward toward the downstream side. Further, the vertical portion of the downstream pipe body 6 is also a pipe that goes downward as it goes downstream.
For this reason, in this second construction example, when the joint member 1 is arranged in a substantially horizontal direction, the downstream pipe body 6 which is a pipe on the downstream side of the joint member 1 is lowered downward in order to perform natural drainage. Piping is going to.

  When the sink K and the electric water heater D having the drainage pipe configured as described above generate drainage by use, the generated drainage is discharged to the sewer side in the same manner as in the first construction example described in paragraph 0025. Is discharged.

Further, there is a case where the drainage flows back from the underfloor piping on the sewage side, or a large amount of drainage occurs from the drainage device, and the drainage tends to flow back (or flow into) the branch pipe portion 1b side of the joint member 1.
However, as shown in FIG. 14, the inside of the vertically placed joint member 1 of the second construction example of the first embodiment forms an air reservoir in the branch pipe portion 1b as shown in FIG. It is configured to prevent the backflow drainage from entering the branch pipe.
More specifically, when the joint member 1 of the present invention is placed horizontally, that is, when the main body portion 1a is arranged in a substantially horizontal direction, the highest position of the downstream end portion of the storage wall 2 is the connection of the branch pipe portion 1b. It is configured such that it is located at a position lower than the opening portion (the connecting portion between the main body portion 1a of the joint member 1 and the branch pipe portion 1b is the upper end position of the main body portion 1a when the joint member 1 is placed horizontally) Therefore, it is easy to configure that the highest position of the downstream end of the storage wall 2 is lower than the opening of the connection portion between the branch pipe portion 1b and the main body portion 1a. ).
In addition, since the check valve 3 that is normally closed is provided at the end of the branch pipe portion 1b, air does not escape from the branch pipe portion 1b to the upstream side (electric water heater D side).
Therefore, regarding the joint member 1, in the region including the branch pipe portion 1b and the connection portion with the branch pipe portion 1b but not including the upstream end portion of the main body portion 1a, the most downstream end portion of the storage wall 2 is included. Air pockets occur in the space higher than the higher position.
In addition, as described above, the downstream side pipe is a pipe that is directed downward toward the downstream side for natural drainage. Naturally, the upper surface of the inner side surface of the downstream side pipe is also formed so as to be directed downward as it goes downstream, so that the air in the air pool is blown from a space portion higher than the highest position of the downstream end portion of the storage wall 2. There is no part that comes out.
Therefore, as shown in the region indicated by “C” in FIG. 14, the downstream end of the storage wall 2 including the opening of the joint member 1 and the downstream pipe with the branch pipe portion 1b of the joint member 1 is included. Air pockets occur in the space above the highest point of the section.
If the downstream pipe is arranged so as to be directed upward toward the downstream side, the branch pipe portion 1b and the connection portion with the branch pipe portion 1b are included along the upward slope of the downstream pipe. The air in the region not including the upstream end of the main body portion 1a escapes to the downstream side, but as the drainage pipe, in order to perform natural drainage, the pipe that goes downward toward the downstream side is used. When placed horizontally, an air trap is always generated in the space portion of the downstream pipe from the joint member 1 above the highest position of the downstream end of the storage wall 2.
Then, in the joint member 1, when the main body portion 1a is arranged in a substantially horizontal direction, the highest position of the downstream end portion of the storage wall 2 is lower than the opening portion of the connection portion with the branch pipe portion 1b. Since it is configured as described above, the openings of the main body portion 1a and the branch pipe portion 1b are always included in this air pool portion, and the drainage of the branch pipe portion 1b and the branch pipe portion 1b is caused by the air pool. It does not enter the position of the check valve 3 on the upstream side.
Therefore, the backflow drainage does not reach the pipes on the water supply side such as the drain trap DT of the electric water heater or the water storage tank of the electric water heater D, and the backflow is prevented by the air pool in the branch pipe portion 1b. Since the valve 3 does not touch the drainage from the drainage pipe, it is possible to use the device on the electric water heater D side of the check valve 3 in an extremely hygienic manner.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-mentioned embodiments, and can be freely modified within a range not changing the gist.
For example, in the above embodiment, the sink K is used as the first drainage device, but the present invention is not limited to the above embodiment, and any drainage device such as a washbasin may be used as needed. You can use it.
Further, in the above-described embodiment, the branch pipe 5 is connected to the electric water heater D which is a drainage device, and the waste water is configured to flow through the branch pipe 5 and the branch pipe portion 1b connected thereto. The configuration is not limited, and instead of the electric water heater D, a device such as a vent hole or an intake valve through which air passes through the branch pipe 5 and the branch pipe portion 1b may be used. As described above, the fluid passing through the branch pipe 5 and the branch portion 1b may be any fluid such as gas or liquid, and is not particularly limited.

Further, in the above-described embodiment, the storage wall 2 of the joint member 1 is configured to be connected to the inner surface of the main body portion 1a along the axial direction of the tubular main body portion 1a. However, like the joint member 1 shown in FIGS. 15 to 19, the storage wall 2 has a substantially funnel shape, and the upstream end of the storage wall 2 is a tube of the joint member 1. It may be configured so as to be connected to the inner surface of the main body 1a in a circular shape over the entire circumference.
Even in this case, when the joint member 1 is vertically installed, as shown in FIGS. 16 and 17, and when the joint member 1 is horizontally installed, as shown in FIGS. 18 to 19, When a backflow occurs, an air pool is formed, and the air pool can prevent drainage from entering the branch pipe portion 1b or the position of the check valve 3 on the upstream side of the branch pipe portion 1b.

  Further, in the first embodiment and the embodiment of FIG. 15, the main body portion 1a of the joint member 1 and the storage wall 2 are configured as an integral member, but the present invention is not limited to the above embodiment. The main body 1a and the storage wall 2 may be separate members, and may be configured to be watertightly connected by fitting connection or other method.

  Regarding the "open position on the downstream side of the storage wall 2", when the lower end of the storage wall 2 is formed by a surface perpendicular to the axis of the main body 1a forming the cylinder as in the first embodiment, Although the entire downstream end of the storage wall 2 is referred to as the “downstream end closest to the upstream side”, this varies depending on the shape of the downstream end of the storage wall 2. For example, as in the embodiment shown in FIG. 20, when the lower end of the storage wall 2 is formed by an inclined surface or the like, among the downstream end portions of the storage wall 2, the downstream end closest to the upstream side. The position indicated by a point D in FIG. 20, which is a portion, is the downstream open position of the storage wall 2.

DESCRIPTION OF SYMBOLS 1 Joint member 1a Main body part 1b Branch pipe part 2 Storage wall 2a Plate part 2b Fan-shaped part 3 Backflow prevention valve 4 Upstream side pipe body 5 Branch pipe pipe 6 Downstream side pipe D Electric water heater DT Electric water heater drain trap K Sink KT Drain trap of sink W Water surface of drainage when backflowing

Claims (8)

A drainage piping structure for treating wastewater from drainage equipment,
Drainage equipment,
A drainage main pipe that discharges the drainage of drainage equipment,
A branch pipe through which the fluid passes,
The upstream end is connected to the drain main pipe, the downstream end is connected to the sewer pipe, respectively, and a joint member provided with a branch pipe portion arranged in a substantially horizontal direction connected to the branch pipe ,
Provided in the pipe from the branch pipe to the branch pipe of the joint member, it is normally closed, and opens only when the fluid moves from the branch pipe side to the branch pipe side to allow passage of the fluid. Allowable check valve and
In the piping structure of drainage equipment consisting of
Inside the joint member,
It is equipped on the inner surface of the main body,
The upstream end is connected to the inner side surface of the main body portion at a position upstream of the opening of the connection portion with the main body portion of the branch pipe portion,
The downstream end is opened on the downstream side of the opening at the connection point with the main body of the branch pipe section,
Inside the body, up to the downstream open position,
A region that includes a connection portion with the branch pipe portion and does not include the upstream end portion of the main body portion,
While partitioning into a region that includes the connection part with the upstream side of the main body part and does not include the connection part with the branch pipe part,
When the main body part and the branch pipe part are arranged in a substantially horizontal direction, the highest position of the downstream side end part is provided with a storage wall which is lower than the opening part of the connection part with the branch pipe part. Plumbing structure for drainage equipment. In the piping structure of the drainage device,
2. The drainage device according to claim 1, wherein the branch pipe is a pipe of a drainage device different from the drainage device connected to the drainage main pipe, and a drainage trap is further provided on the branch pipe. Piping structure. In the piping structure of the drainage device,
The drainage device connected to the branch pipe is an electric water heater as a drainage device, and the pipe structure for the drainage device according to claim 1 or 2. In the piping structure of the drainage device,
The piping structure of the drainage device according to any one of claims 1 to 3, wherein the storage wall is connected to an inner surface of the main body along the axial direction of the tubular main body. In the piping structure of the drainage device,
The storage wall has a substantially funnel shape, and an upstream end of the storage wall is connected to the inner surface of the tubular main body of the joint member over the entire circumference. The piping structure of the drainage device according to claim 3. The drainage device according to any one of claims 1 to 5, wherein the storage wall is configured separately from the other part including the main body part and the branch pipe part of the joint member. Piping structure.   7. The branch pipe portion is connected to the main body portion of the joint member at a position above the central axis of the main body portion when the main body portion is arranged in a substantially horizontal direction. The piping structure of the drainage device according to any one of 1.   In the piping structure of the drainage device, when the joint member is arranged in a substantially horizontal direction, at least the pipe on the downstream side of the joint member is a pipe that is directed downward toward the downstream side for natural drainage. The pipe structure of the drainage device according to any one of claims 1 to 7.

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