JPH0510065Y2 - - Google Patents

Description

[Detailed explanation of the invention] [Purpose of the invention] (Field of industrial application) This invention relates to a drainage trap with a backflow prevention device, which is installed in a closed water heater, and allows excessively expanded water to escape from the relief valve. This invention relates to a drainage trap with a backflow prevention device that can easily and hygienically discharge expanded water to the outside when released.

(Prior art) Conventionally, when heated water expands excessively in a closed water heater, the excess expanded water is released from a relief valve, and the expanded water is discharged as appropriate. It was being discharged outside via piping.

(Problems to be solved by the invention) <Problems with the conventional technology> However, when discharging the above-mentioned expanded water, in reality, the excessive amount of expanded water requires the formation of at least a dedicated pipe for draining the expanded water. Generally, the waste is discharged at a high cost, which poses the problem of high costs.

In addition, when discharging expanded water, a relief valve and its drainage equipment are installed in order to drain excess expanded water to drainage equipment such as a washbasin drainage pipe or a sink drainage pipe, without forming a dedicated drainage pipe. When connected, costs are reduced because there is no need to create dedicated piping, but if the flow of the drainage equipment becomes poor or clogged, there is a risk that sewage, etc. will flow back into the water heater. This becomes a major hygiene problem.

<Technical Issues> Therefore, in view of the above-mentioned problems, this idea was developed to prevent backflow from the existing piping of the drain in a closed water heater, and to prevent excessively expanded water from flowing out from the relief valve. This was devised with the aim of making it possible to easily and hygienically discharge the expanded water to the outside when it is released.

[Structure of the invention] (Means for solving the problem) This invention consists of a drainage trap chamber through which excessively expanded water released from a relief valve attached to a closed water heater is passed and drained, and this trap. The drainage trap chamber is composed of a backflow prevention device disposed downstream of the chamber and a water seal reference water level holding section disposed downstream of the backflow prevention device, and the drainage trap chamber is configured to take in the excessively expanded water. At the same time, the bottom part and the upstream side of the backflow prevention device are connected, and the backflow prevention device is arranged with the upstream side facing down and the downstream side facing up, and has a specific gravity slightly larger than the specific gravity of water. The water seal reference water level holding part is formed by a sphere that can be connected to a drainage facility such as a washbasin drainage pipe or a sink drainage pipe. A reference water level securing pipe is connected to and raised downstream of the backflow prevention device at a height below the upper limit water level of the drainage trap chamber, and a pipe is connected and extended to this pipe and bent to the side. The above-mentioned problems are solved by forming a drain pipe line for discharging water to a drainage facility.

(Function) The drain trap with a backflow prevention device according to this invention takes excessively expanded water released from the relief valve of a closed water heater into the drain trap chamber. Then, the expanded water flows from the bottom of this drainage trap chamber to the upstream side of the backflow prevention device, passes through the flow hole of the backflow prevention device, passes through the water seal standard water level holding part, and then flows through the washbasin drainage pipe and the sink drainage pipe. Discharge to the outside through drainage equipment such as

At this time, a backflow prevention device is placed with the upstream side facing down and the downstream side facing up, and the downstream side is closed by a sphere with a specific gravity slightly larger than that of the water, and the flow hole for the expanded water is sealed off. In the case of a flow towards the drainage facility, the expanding water pushes the sphere upwards and flows into the water sealing reference water level holding part. Furthermore, in the case of backflow, the sphere closes off the flow hole and prevents water, etc. downstream of the backflow prevention device from flowing into the drainage trap chamber.

Then, the reference water level securing pipe of the water sealing reference water level holding part is connected and raised downstream of the backflow prevention device at a height below the upper limit water level of the drain trap chamber, and the drainage pipe is connected to this pipe laterally. If the water level becomes higher than the height of the standard water level securing pipe, the water will be drained from the drainage pipe to the drainage equipment. Even when the communication hole is blocked by the sphere, the water seal reference water level line can always be secured.

(Embodiment) An embodiment of this invention will be described below with reference to the drawings.

That is, the reference numeral 1 shown in the figure is a drain trap chamber, in which expanded water B that expands excessively when water is heated in a closed water heater H is sent to an upper intake port through a relief valve (not shown). It has a cylindrical shape with a bottom so that it can be taken in from 2.

A communication portion 4 connects the bottom 3 of the drainage trap chamber 1 and the upstream side 16 of the backflow prevention device 11, which will be described later.
It is formed to communicate through.

On the other hand, reference numeral 11 denotes a backflow prevention device, which is arranged so that its upstream side 16 faces downward and its downstream side 17 faces upward. Backflow prevention device main body 12 having 14
and a sealing sphere 13 having a specific gravity slightly larger than that of water, which does not float in water but moves with the flow of water.

The backflow prevention device 11 has a downstream edge 17 of the flow hole 14 of the backflow prevention device main body 12 which is largely chamfered, and the sealing sphere 13 is disposed on the downstream side 17 of the backflow prevention device main body 12. It is formed so that the communication hole 14 is sealed by bringing the sealing sphere 13 into contact with the chamfered portion.

In this case, in order to improve the degree of sealing, packings 15 made of O-rings or the like are placed on the chamfered portion and at appropriate positions on the outer peripheral surface of the backflow prevention device main body 12, respectively. In addition, this backflow prevention device main body 12 is generally used by being press-fitted into a pipe, and in the case of this embodiment, it is also used by being press-fitted into the lower end of a reference water level securing pipe line 22, which will be described later. At this time, the packing 15 on the outer peripheral surface of the backflow prevention device main body 12 is useful for improving the degree of sealing. In the case of the communication section 4, a communication chamber 4a is formed at the upstream side 16 of the backflow prevention device 11, and the communication chamber 4a and the bottom 3 of the drain trap chamber 1 are communicated with each other to prevent backflow from the drain trap chamber 1. The prevention device 11 and the reference water level securing conduit 22 described later are formed so that the front shape is approximately U-shaped.

A water seal reference water level holding section 21 is disposed downstream 17 of the backflow prevention device 11 .

This water seal reference water level holding part 21 has one end connected to a nut in order to connect the downstream side 17 of the backflow prevention device 11 to drainage equipment such as the drainage pipe P of the wash basin W and the drainage pipe of the sink (not shown). The pipe line is formed so that it can be fixed and connected to the drainage pipe P by a connecting part 24 made of, etc.
2 and a drainage pipe line 23.

The reference water level securing conduit 22 has a height below the upper limit water level of the drain trap chamber 1, that is, when the expanded water B accumulates in the drain trap chamber 1, it becomes dangerous if the water level rises any higher. The water seal reference water level 25 is a position lower than the height of the upper limit water level set slightly lower than the dangerous water level, and this water seal reference water level 2
Raise the pipe line to position 5 and install backflow prevention device 1.
It is connected to the downstream side 17 of 1.

The drainage pipe line 23 is a pipe line bent and extended to the side from the reference water level securing pipe line 22, and a connecting part 2 for connecting to drainage equipment such as a drain pipe P is provided at the tip of the pipe line.
4 is formed.

The drainage trap chamber 1, backflow prevention device 11, and water seal reference water level holding section 21 formed in this way are
As shown in FIG. 2, when viewed from the front, the entire body has a substantially horizontal S-shape, with a backflow prevention device 11 disposed in the middle thereof.

Incidentally, the drainage trap with a backflow prevention device according to the present invention is not limited to the embodiments described above.
Further, any material may be used for the sealing sphere 13, but good operation was obtained when nylon was used, for example, taking into account phenomena such as lifting and examining the specific gravity, etc.

Next, the operation of this drainage trap with backflow prevention device will be explained.

That is, for example, as shown in Fig. 4A or Fig. 4B, it is used by being connected to the drain pipe P of the washbasin W, and is used to remove excess water discharged from the relief valve of the sealed water heater H. Expanded water B is taken into the drain trap chamber 1. And this drainage trap chamber 1
The expanded water B flows from the bottom 3 to the upstream side 16 of the backflow prevention device 11, and the expanded water B flows through the flow hole 14 of the backflow prevention device 11.
The water passes through the water seal standard water level holding part 21 and is discharged to the outside through the drain pipe P of the washbasin W.

At this time, if the flow of the expanded water B is directed toward the drainage equipment, the expanded water B pushes the sealing sphere 13 upward and flows into the water seal reference water level holding part 21 through the backflow prevention device. Further, when the flow of the expanded water B is in the opposite direction to the above-mentioned flow, the sealing sphere 13 closes the communication hole 14 and the downstream side 1 of the backflow prevention device 11 is closed.
The water etc. in Step 7 should not flow into the drainage trap chamber 1. Then, when the water level of the expanded water B becomes higher than the height at which the reference water level securing pipe line 22 rises, the water is drained from the drain pipe line 23 to the drain pipe P.

Further, the expanded water B is taken into the drainage trap chamber 1, and the backflow prevention device 11 and the water sealing standard water level holding part 21
If the water level of the expanded water B becomes higher than the rising height of the reference water level securing pipe 22 due to the flow of the drain pipe P becoming poor or becoming clogged, backflow is prevented. Since backflow is prevented by the device 11, the line of the water seal reference water level 25 can always be maintained, and from a sanitary point of view, there is no possibility that sewage, etc. will flow back into the water heater H, which is very good. It is.

On the other hand, when connecting to the drain pipe P using the connecting portion 24, the connection can be easily made by connecting via a connecting tool 26 as shown in FIGS. 1 and 2.

This connector 26 is formed of a cylindrical body, the outer diameter of one end 27 is tapered with a step so that it can fit into the drain pipe P, and the inner diameter of the other end 28 is tapered with a step. The drainage pipe P is dimensioned so that it can be fitted therein, and a connecting port 29 connectable to the connecting portion 24 is formed approximately in the middle thereof, and an outlet 30 from this connecting port 29 into the connecting tool 26 is connected to the one end portion 27. It was designed for this purpose.

When attaching this connector 26 to the drain pipe P, cut the drain pipe P appropriately,
At the cut part of the drain pipe P, the wash basin W
The cut end of the glue is inserted into the other end 28 of the connecting tool 26 to connect it, and the one end 27 of the connecting tool 26 is inserted into the cut end on the opposite side to connect it, and the joints are appropriately sealed. This is done by opening the connection port 2.
A connecting portion 24 is connected to the drain pipe 9 to connect the drain pipe P and the drain pipe line 23.

Therefore, in the conventional case, a branch joint (not shown) or the like is installed in the middle of the existing drainage pipe P so that the connecting part 24 or the like can be connected, and in that case, after cutting the drainage pipe P, It was necessary to carve connecting screws on the outer periphery of both cut ends and screw them together with the branch joints to seal them, which had the disadvantage of being very troublesome work, but it is easy if you use the connecting tool 26. Since it can be connected to the drain pipe P, the work becomes easier.

Moreover, if such a connector 26 is used, even if the distance between the drain pipe P and the drain pipe line 23 is far, a pipe line (not shown) can be appropriately interposed between them, and the connecting port 29 of the connector 26 can be connected. toward the connecting portion 24
By arranging it lower than the position of , it is easy to drain water from the drain pipe line 23 to the drain pipe P, and the grounding location of this drain trap is not limited, so that the water heater H can be installed freely. It is a choice.

[Effects of the invention] This invention constructed as described above has a drainage trap chamber 1 that drains the excessively expanded water B that is discharged from the relief valve attached to the closed water heater H by passing through it.
The drainage trap chamber 1 consists of a backflow prevention device 11 disposed on the downstream side of the trap chamber 1, and a water seal reference water level holding section 21 disposed on the downstream side 17 of the backflow prevention device 11. , is formed to take in the overexpanded water B, and communicates the bottom part 3 with the upstream side 16 of the backflow prevention device 11, and the backflow prevention device 11 has the upstream side 16 below and the downstream side. 17 facing upward, the water seal reference water level holding part 2
Reference numeral 1 denotes a pipe line that can be connected to a drainage equipment such as a drainage pipe P of a washbasin W or a drainage pipe of a sink, and the downstream side of the backflow prevention device 11 is located at a height below the upper limit water level of the drainage trap chamber 1. The reference water level securing pipe 22 connected to the water pipe 17 and the pipe 2
2, and a drain pipe 23 that is extended and bent laterally to drain water to the drainage equipment, so when viewed from the front, the whole is approximately horizontally S-shaped, and there is no backflow in the middle part. It has a shape in which a prevention device 11 is arranged.

Therefore, when the water level of the expanded water B rises above the height of the standard water level securing pipe 22, the expanded water B flows to the drainage equipment via the drainage pipe 23 and is discharged.
can be easily drained using existing drainage equipment. Furthermore, as mentioned above, since the entire structure is in a horizontal S-shape, it can also serve as a trap.

The biggest problem when using this type of existing drainage equipment is that sewage, etc. flows back from the drainage equipment and enters the water heater H, making it completely unsuitable from a sanitary standpoint. However, the structure of the backflow prevention device 11 is such that the spherical body 13 has a specific gravity slightly larger than that of the expanded water B.
The expanded water B flows from the downstream side 17 to the flow hole 14.
Since the water heater H is designed to be able to be sealed, any waste water that attempts to flow back will never reach the water heater H since the flow hole 14 will be automatically sealed by the sphere 13.

Moreover, at that time, if the water level of the expanded water B exceeds the height of the water seal reference water level 25 in the drainage trap chamber 1, the water pressure flowing through the drainage equipment increases by the amount of water that exceeds the water level. It is safe because the expanded water B will not flow into the drainage equipment and overflow due to excessive intake of expanded water B into the drainage trap chamber 1.

In this way, according to this invention, in a closed water heater, backflow from the existing piping of the drain is prevented, and when excessively expanded expanded water is released from the relief valve, the expanded water is It can be easily and hygienically discharged to the outside, and since the structure is simple, it can be provided at a low cost, and has practical beneficial effects.

[Brief explanation of the drawing]

The drawings show an embodiment of this invention; Fig. 1 is a partially cutaway perspective view, Fig. 2 is a front sectional view, Fig. 3 is a sectional view of the backflow prevention device, and Fig. 4 is a schematic front view of the device in use. It is a diagram. B... Expanded water, H... Water heater, P... Drain pipe, W... Wash basin, 1... Drain trap chamber, 2...
...Intake port, 3...Bottom, 4...Communication part, 4a...
Communication chamber, 11... Backflow prevention device, 12... Backflow prevention device main body, 13... Sealing sphere, 14... Distribution hole, 15... Packing, 16... Upstream gawa, 1
7...Downstream side, 21...Water seal standard water level holding part,
22... Standard water level securing pipeline, 23... Drainage pipeline,
24... Connecting portion, 25... Sealing reference water level, 26...
...Connector, 27...One end, 28...Other end, 2
9... Connection port, 30... Exit.

Claims (1)

[Scope of utility model registration request] A drainage trap chamber through which excessively expanded water released from a relief valve attached to a closed water heater is passed and drained, a backflow prevention device installed downstream of this trap chamber, and a backflow prevention device installed in the backflow prevention device. The drainage trap chamber is made up of a water seal standard water level holding section placed on the downstream side, and is formed to take in the excess expansion water, and communicates the bottom with the upstream side of the backflow prevention device to prevent backflow. The prevention device is arranged with its upstream side facing down and its downstream side facing up, and is formed so that the downstream side can be closed and the flow hole of the expanded water can be closed by a sphere whose specific gravity is slightly larger than that of water. The water seal standard water level holding part is a conduit that can be connected to a drainage equipment such as a washbasin drainage pipe or a sink drainage pipe, and the backflow prevention device is installed at a height below the upper limit water level of the drainage trap chamber. A backflow prevention system characterized by being formed of a standard water level securing pipe connected to the downstream side and a drainage pipe connected and extended to this pipe, bent to the side, and discharging the water to the drainage equipment. Drainage trap with device.