JPH069092Y2 - Drainage device - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a drainage device for collectively discharging drainage from a washbasin and expansion water of a stop-type electric water heater for hot water supply to a drainage main of a building. .

[Conventional technology]

As the structure of the expansion water drain of the electric water heater, for example, as described in U.S. Pat.No. 3,885,584, the end of the expansion water drain from the relief valve provided in the water heater from the washbasin etc. Some are connected to drains.

However, if the water heater is attached to a washbasin, and the expansion water drain pipe from the water heater is connected to the drain pipe from the washbasin, etc., the wastewater will mix into the hot water due to the backflow of the wastewater from the washbasin, etc. There is a problem.

This problem is based on the Ministry of Construction notification No. 1597 in 1975,
The spout for draining water to the atmosphere and the water receiving port are provided in the expansion water drainage channel,
This can be solved by providing a trap or a check valve in the flow path.

[Problems to be solved by the device]

An example of a vanity table with an electric water heater having a structure in which a check valve is provided in an expansion water drainage channel is disclosed in Japanese Utility Model Laid-Open No. 60-76868. This is one in which the end of the expansion water drainage path is connected to a drain pipe from the washbasin as a trap structure, and a check valve utilizing the buoyancy of the ball valve is further provided at this end part.

By the way, a drainage pipe of a vanity or the like is generally connected to a drainage main pipe of a building by a floor drainage pipe. this is,
This is because there are advantages such as being easy to construct and not requiring large-scale construction even in the case of remodeling. Since such a drainage pipe is common, the drainage pipe of the washbasin has a relatively simple structure in which a trap is provided midway and the lower end is a straight pipe. However, in order to connect the discharge pipe of the expanded water to the drain pipe of the washbasin, a special member for connection is required, and the normal drain pipe cannot be used as it is. Therefore, when the electric water heater is provided, it is necessary to prepare a drain pipe of another specification, which is disadvantageous in terms of cost.

Further, when the drainage channel of the expansion water is connected in the middle of the drainage pipe, the confluence point of the drainage and the expansion water becomes close to the level of the expansion pipe and the washbasin of the electric water heater. Therefore, the head difference between the drainage and the position where the expanded water flows down is small. In this case, for example, when a relatively large amount of expanded water and drainage flow down to the confluence point at the same time, because the head to the confluence point is too small, the resistance due to the confluence of the expansion water and the drainage cannot be ignored, There is a risk that stagnation will occur and it will not be possible to quickly discharge. In addition, the check valve that prevents backflow to the expansion water discharge pipe further causes the ball valve of the check valve to rise by the buoyant force received from water and close the flow path, so that the closing valve can be actuated quickly to prevent backflow. Therefore, it is necessary to increase the volume of the ball valve to increase the buoyancy. For this reason, the diameter of the ball valve becomes large, and the diameter of the pipe for accommodating the ball valve also needs to be large. However, in the case where the pipe is housed in a cabinet such as a vanity, it is required to make the pipe space as small as possible, and thus the increase in diameter of the pipe by the ball valve remains an unfavorable problem.

Therefore, the present invention makes it possible to easily perform piping for drainage from a washbasin and expansion water from an electric water heater, and to quickly discharge these drainage and expansion water to a drainage main of a building. The purpose is to

[Means for Solving the Problems]

In order to achieve the above object, the drainage device of the present invention is provided with a pipe at the bottom of each of the expansion water discharge pipe and the drain pipe such as a washbasin which are connected to the expansion pipe of the electric water heater in an open state to the atmosphere. It is characterized by being provided with an adapter for connecting with the drain main.

If the inflow point of the expanded water discharge pipe is higher than the lower end of the drain pipe, the adapter reduces the degree to which the drainage from the washbasin or the like flows back to the electric water heater side.

Further, if the drain pipe from the washbasin and the drain main pipe on the building side are coaxially connected by the adapter, drainage can be quickly performed.

Furthermore, if a check valve for preventing backflow to the expansion water discharge pipe is provided in the adapter, the backflow of waste water to the electric water heater can be completely prevented.

Furthermore, if the lower end of the drainage pipe is inserted and a plurality of ribs for receiving this are provided in the adapter, and the gap between these ribs is used as the flow path from the expanded water discharge pipe to the drainage main, Connection is easy and the strength of the adapter itself is improved.
Further, if the valve body of the check valve for preventing backflow to the expansion water discharge pipe is formed in a vertically long columnar shape, sufficient buoyancy can be obtained even if the inner diameter of the pipe line is small, and the piping space can be reduced.

〔Example〕

Hereinafter, the features of the present invention will be specifically described with reference to the embodiments shown in the drawings.

FIG. 1 is a schematic view showing an example in which the drainage device of the present invention is provided on a vanity table with an electric water heater.

In the figure, a washbasin 1 is fixed to a cabinet B arranged on a floor A, and a cabinet type electric water heater 2 is housed inside the cabinet B. To the electric water heater 2, a water supply pipe from the hot water mixing tap 1a provided in the washbasin 1 and a pipe (not shown) such as a hot water supply pipe for feeding hot water heated to the hot water mixing tap 1a are connected. Then, the hot water from the electric water heater 2 or hot water from the electric water heater 2 is operated by operating the hot and cold water mixing tap 1a.
Can be discharged.

The electric water heater 2 incorporates a relief valve or the like for letting out expanded water due to heating, and the expansion pipe 3 thereof is projected to the outside. A hopper-shaped water receiving portion 4 is connected to the pipe end of the expansion pipe 3 so as to open to the atmosphere, and a trap is provided downstream thereof.
The expansion water discharge pipe 5 provided with 5a is connected.

On the other hand, the drain pipe 6 is connected to the washbasin 1 by forming a trap 6A in the middle of the same as on the expanded water side, and the pipe end is directed to the floor A direction.

At the lower end of each of the expanded water discharge pipe 5 from the electric water heater 2 and the drain pipe 6 from the washbasin 1, an adapter 7 for connecting a flow path to a drain main a on the side of the building that is piped under the floor A is provided. Are connected. As shown, the adapter 7 is arranged so as to pass through a hole b-1 formed in the bottom plate b of the cabinet B, and a cover C for hiding the adapter 7 from the top is provided in the cabinet b.

FIG. 2 is a vertical cross-sectional view showing the flow path connection structure by the adapter 7.

The adapter 7 is made by integrating an upper member 8 and a lower member 9 made of synthetic resin or the like. The drain pipe 6 is provided on the upper member 8.
And an expansion water inflow pipe 8b connected to the expansion water discharge pipe 5, respectively. Further, the lower member 9 forms a connection sleeve 9a with the drain main a so as to be coaxial with the connection sleeve 8a. The connection sleeve 8a is connected to the drain pipe 6 by a cap nut 8c and a packing 8d, while the bush 10 is integrated with the drain main a as a separate member, and similarly, the lower member 9 is drained by a cap nut 9b and a packing 9c. Connect to a.

The expansion water inlet tube 8b of the upper member 8 has a check valve for preventing the water from the washbasin 1 and the drain main a from flowing back to the electric water heater 2.
11 are provided. This check valve 11 is a float type valve body 11a.
Is housed in the expanded water inflow cylinder 8b, and the packing 11b provided at the upper end of the valve body 11a is brought into close contact with the inner peripheral wall of the upper end of the expanded water inflow cylinder 8b to shut off the flow path to the electric water heater 2. The valve element 11a is in the shape of a cylinder that is long in the vertical direction as shown in the figure, and the specific gravity is, of course, smaller than 1. In this way, since the valve body 11a is formed into a long cylindrical shape, sufficient buoyancy can be obtained without increasing the diameter of the valve body 11a. Therefore,
When the ball valve as described in the conventional example is used, the diameter of the pipe is large, whereas the outer diameter of the expanded water inflow cylinder 8b that houses the valve body 11a can be small. Therefore, even if the piping is along the drainage pipe 6, the piping space in the width direction does not expand, and compact piping is possible. Further, even if the valve body 11a is long in the vertical direction, it can be included in a pipe having a small diameter, so that the piping space is not expanded.
As shown in FIG. 3 (a sectional view taken along the line II in FIG. 2), a guide 11c for guiding the circumferential surface of the valve body 11a is provided on the inner circumference of the expansion water inflow cylinder 8b. When 11a is in the illustrated state, the flow path from the electric water heater 2 into the adapter 7 is always open.

As shown in FIGS. 2 and 4, the lower member 9 is formed with four ribs 12 projecting from the upper end of the connecting sleeve 9a, and the gap between these ribs 12 is extended from the expansion water inflow cylinder 8b to the connecting sleeve. It is a connecting flow path to 9a. The upper ends of the ribs 12 also function as stoppers by locking the lower ends of the drainage pipes 6 as shown in FIG.

In the above configuration, when the expanded water is generated by the heating of the electric water heater 2, the expanded water is discharged from the expansion pipe 3 to the water receiving portion 4 which is open to the atmosphere, and flows into the adapter 7 from the downstream expanded water discharge pipe 5. To do. At this time, the valve body 11a of the check valve 11
Since its own weight makes it stand still at the position shown in FIG. 2 to open the flow path, the expanded water flows quickly and is discharged from the adapter 7 to the drain main a.

Here, when the flow path in the drainage main a is blocked by a foreign substance or the like, the water flow may be poor and the water may flow back into the adapter 7. In this case, the backflow water is the electric water heater 2
The flow is shut off by the check valve 11 even when trying to move to the side. That is, when a certain amount of water is accumulated inside the expansion water inflow cylinder 8b, the valve body 11a is lifted by buoyancy, and the packing 11b at the upper end thereof is in close contact with the inner peripheral wall of the expansion water inflow cylinder 8b to close the flow path. Therefore, even if water overflows from the drain main a and flows backward, the flow is stopped by the check valve 11 and the water does not enter the electric water heater 2. Further, the prevention of such backflow is the same when a large amount of water is discharged from the washbasin 1 at once, and in any case, the backflow toward the electric water heater 2 is prevented. Further, when the amount of water in the expanded water connection cylinder 8b is reduced, the buoyancy on the valve body 11a is also decreased, and the valve body 11a descends by its own weight and returns to a state in which the expanded water can be discharged.

Further, since the drainage pipe 6 and the drainage main a on the building side are connected coaxially, even if a large amount of drainage flows from the washbasin 1 all at once, it is quickly discharged. Therefore, there is no possibility that the drainage will flow back from the expanded water inlet tube 8b to the expanded water discharge pipe 5, and it is not necessary to care about the amount of drainage when using the washbasin 1. Further, since the rib 12 for receiving the lower end of the drainage pipe 6 and forming the flow path for the expansion water is provided inside the adapter 7, the adapter 7
The strength of itself is improved. In particular, since the drain pipe 6 is connected by insertion and tightened with the cap nut 8c, if the bottom wall of the lower member 8 is made flat, the member may be deformed. On the other hand, the rib 12 increases the strength and the cap nut 8c
It is possible to prevent the lower member 8 from being distorted or deformed even if it is strongly tightened. Also, packing 8d by tightening cap nut 8c
The sealing pressure is secured and water leakage can be completely prevented.

FIG. 5 shows another example, in which the adapter 7 of FIG. 2 is connected to the drain main a by a deodorant ring 13 instead of the bush 10, and the outer structure is that of FIG. Is exactly the same as. The deodorant ring 13 is made of an elastic material such as rubber and formed in a ring shape. As shown in the figure, the deodorant ring 13 is fitted into the upper end of the drainage main a, and the connection sleeve 9a of the adapter 7 is fitted therein. ing. Also in this configuration example, the backflow prevention in the direction of the electric water heater 2 is exactly the same as in the case of the example of FIG.

Further, FIG. 6 shows another example, which is different from the above example in the connection structure of the drainage pipe 6 from the washbasin 1. That is, as shown in FIG. 6 (a), the inner peripheral flange 14 is provided at the lower end of the connection sleeve 8a formed on the upper member 8 of the adapter 7, and the lower end of the drainage pipe 6 is abutted against the inner peripheral flange 14 for connection. Has become. It is not necessary to provide the ribs 12 as shown in FIGS. 2 and 5, and the drainage from the drainage pipe 6 flows from the connection sleeve 9a arranged concentrically therebelow to the drainage main a, and also the expansion water drainage pipe. The expanded water from 5 flows into the adapter 7 and is discharged from the connecting sleeve 9a as it is.

In this way, the simple structure of providing the inner peripheral flange 14 at the lower end of the connecting sleeve 8a can connect the drainage pipe 6 and secure the drainage flow path of the expansion water, and the cost is higher than that when the rib 12 is provided. It is advantageous in terms. Also, since the connection sleeve 9a is connected to the drainage main a by the deodorant ring 13 including the case of FIG. 5, the bush 10 which is a machined product is used.
Since the cap nut 9b, the packing 9c and the like are not required, the cost can be further reduced.

7 and 8 are vertical sectional views showing an example in which the adapter 7 has a double pipe structure.

In FIG. 7, the drainage pipe 6 penetrates the adapter 7 in the vertical direction, and the bottom wall of the lower member 9 has an expanded water discharge port 9d having an annular cross section surrounding the drainage pipe 6. A bush 10 for receiving the drain pipe 6 is integrated with the upper end of the drain main a, and the bush 10 is attached to the adapter 7 by the deodorant ring 13.
It is fixed to. Further, in order to connect the expansion water discharge port 9d to the drain pipe a, projections 10a are provided on the inner circumference of the bush 10 at, for example, four places, and the projections 10a receive the lower end of the drain pipe 6 and the respective projections 10a. The gap between them serves as a flow path for the expansion water.

In such an adapter 7 structure, the drainage water from the washbasin 1 directly flows into the drainage main a, and the expansion water from the electric water heater 2 flows into the adapter 7, so that the flow is different from the above example. . That is, in the one shown in FIG. 2, FIG. 5 and FIG. 6, the expansion water is made to join the portion into which the drainage from the washbasin 1 flows, but the drainage pipe 6 and the adapter 7 are Due to the double pipe structure, the expanded water has a flow that drops into the drainage from the washbasin 1 discharged from the lower pipe end. Therefore, even when the amount of drainage from the washbasin 1 is large, the expansion water does not receive resistance and falls downward from the expansion water discharge port 9d, is absorbed by the drainage from the washbasin 1, and quickly Expanded water can be discharged.
Further, even when a backflow from the drainage main a occurs, the expansion water outlet 9d has a smaller flow passage area than the drainage pipe 6 so that the backflow to the electric water heater 2 side is less likely to occur.

The example of FIG. 8 is a case where the diameter of the drainage main a is large, and the drainage pipe 6 is inserted as a double pipe to the inside of the drainage main a without using the bush 10, and the others are the seventh. This is exactly the same as the example in the figure.

In this structure, since the drainage pipe 6 penetrates the adapter 7 and goes deep into the drainage main a, the drainage from the washbasin 1 collects in the adapter 7 or flows backward as compared with the case of FIG. 7. The degree is much lower.

Further, FIG. 9 is a schematic cross-sectional view showing another example having a double pipe structure.

In the figure, the adapter 7 is divided into upper and lower chambers 15 and 16, an expansion water inflow cylinder 8b is integrated in the upper chamber 15, and a connection sleeve 9a is fitted in the lower chamber 16 to a drain main a.
Is provided. The partition 17 between the upper and lower chambers 15 and 16 is provided with an opening 17a, and the drain pipe 6 is passed through the opening 17a so that the lower end thereof is positioned in the lower chamber 16. Also the opening
17a is larger than the outer diameter of the drainage pipe 6, and forms an annular flow path around the drainage pipe 6 so that the expansion water flows downstream.

In this adapter 7 structure, drainage water from the washbasin 1 flows into the lower chamber 16 and expansion water from the electric water heater 2 flows into the upper chamber 15. Then, as in the case of FIG. 8, by providing the chambers 15 and 16, the expanded water has a flow that drops into the drainage from the washbasin 1 discharged from the lower pipe end. Therefore, even when the amount of drainage water from the washbasin 1 is large, the expansion water falls downward from the opening 17a without being subjected to resistance, is absorbed by the drainage water from the washbasin 1, and the expansion water is quickly absorbed. Can be discharged. In addition,
In FIG. 9, the valve body 11a provided in the expansion water inflow cylinder 8b is shown as a ball valve.

[Effect of device]

As described above, in the drainage device of the present invention, the adapter is connected to the drainage main of the building, and the drainage pipe of the washbasin and the expansion water drainage pipe from the electric water heater are drained by using this adapter. It is connected to a pipe. Therefore, since the adapter is directly connected to the drainage main pipe that is piped below the floor of the building, the level of the adapter becomes low. Therefore, the head when discharging water or expanded water from the drain pipe of a washbasin or the like becomes relatively high,
Even when water or expanded water from these drain pipes joins and is discharged, it can be quickly discharged without stagnation.
Further, since the pipe ends of the drainage pipe and the expansion water discharge pipe are connected to the adapter, a special structure for integrating these pipes is not required, and for example, a plug-in type enables simple construction. Become.

In addition, if a check valve that prevents backflow in the direction of the electric water heater is integrated into the adapter, even if a large amount of water is discharged from the washbasin or the drain main is clogged, the check valve will turn the water into an electric water heater. It can be used without backflow toward. Further, the valve body of the check valve closes due to the sufficient buoyancy even if it is columnar and has a small diameter, so that the flow passage diameter becomes smaller and the piping space becomes smaller than when a ball valve is used. For this reason,
In the case of piping inside a cabinet, the inside can be used as a storage space for items without any problem.

[Brief description of drawings]

FIG. 1 is a schematic view showing a drainage system of a washbasin equipped with the drainage device of the present invention, FIG. 2 is a vertical sectional view showing a connection structure by an adapter, and FIG. 3 is a view taken along the line II of FIG. FIG. 4 is a longitudinal sectional view showing the lower member of the adapter, FIGS. 5 and 6 are views showing other embodiments, and FIGS. 7 and 8 are double pipe structures. FIG. 9 is a schematic cross-sectional view showing another example of the double pipe structure in the case where the double tube structure is used. 1: Washbasin, 1a: Hot and cold water mixer 2: Electric water heater, 3: Expansion pipe 4: Water receiving part, 5: Expansion water discharge pipe 5a: Trap, 6: Drain pipe 6a: Trap, 7: Adapter 8: Top Member, 8a: Connection sleeve 8b: Expansion water inflow cylinder, 8c: Cap nut 8d: Packing, 9: Lower member 9a: Connection sleeve, 9b: Cap nut 9c: Packing, 9d: Expansion water discharge port 10: Bush, 10a: Protrusion 11: Check valve, 11a: Valve body 11b: Packing, 12: Rib 13: Deodorant ring, 14: Inner peripheral flange 15,16: Chamber, 17: Partition wall 17a: Opening A: Floor, a: Drainage main pipe B : Cabinet, b: Bottom plate b-1: Hole, C: Cover

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-48-94030 (JP, A) Actually opened 62-131691 (JP, U) Actually opened 63-1071 (JP, U)

Claims (6)

[Scope of utility model registration request] 1. An adapter for connecting a lower end of each of an expansion water discharge pipe and a drain pipe such as a wash basin which are connected to an expansion pipe of an electric water heater in an atmosphere open state, and a drain main pipe connected to a building. A drainage device characterized by that. 2. The drainage device according to claim 1, wherein the adapter connects the expansion water discharge pipe by setting an inflow point of the expansion water discharge pipe higher than a lower end of the drainage pipe. 3. The adapter is characterized in that the drain pipe and a drain main pipe on the building side are coaxially connected to each other.
Or the drainage device according to 2. 4. The drainage device according to claim 1, wherein the adapter is provided with a check valve in a flow path from the expansion water discharge pipe. 5. The adapter inserts a lower end of the drainage pipe and projects a plurality of ribs for receiving the ribs upward, and forms a gap between the ribs from the expansion water discharge pipe to the drainage main pipe. The drainage device according to claim 1, wherein the drainage device is a flow path. 6. The drainage device according to claim 4, wherein the check valve includes a vertically long columnar float type valve body.