JP2003082736A - Drain device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drain device capable of fulfilling the requirements of 1. keeping the cleanliness of the reverse flow prevention device of a perforated plate member, 2. preventing reverse flow from drain equipment to a waterproof pan, and 3. increasing the draining performance of the reverse flow prevention device. SOLUTION: This drain device comprises a drain route 3 for discharging drain from facility equipment installed on the waterproof pan P to drain equipment, a perforated plate member 4 having a first discharge port 5 and a second discharge port 6 opened therein and sealingly fitted in any orientation, and the reverse flow prevention device 7 detachably and sealingly fitted into the second drain port 6 of the perforated plate member 4. The reverse flow prevention device 7 comprises a tapered surface convergent from a discharge outlet 10 toward a drain inlet 9 and a float valve 11, and the discharge outlet 10 is positioned at a height lower than the water level of the sealing water in the drain equipment.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drainage device for draining wastewater from facility equipment into sewage.

[0002]

2. Description of the Related Art Conventionally, there have been the following drainage devices in a bathtub as equipment, for example.
The conventional example shown in FIG. 10 includes a waterproof pan, a washing place, and a bathtub placing part for placing a bathtub having a drainage part,
Further, a mounting portion is opened in the bathtub mounting portion, a drainage elbow member as a drainage device is mounted in the mounting portion, and a mounting portion is also opened in the washing area, and a drainage trap is mounted in the mounting portion. Are configured. The drainage elbow member is a drainage device for connecting a waterproof pan and a pipe on the sewage side, usually for simply flowing drainage inside. Also, the drain trap is
It is a drainage device that connects a waterproof pan and a pipe on the sewage side, and is provided with a portion (collected drainage is called "sealing water") that collects the drainage in a flow path of drainage inside the drainage equipment. It has a function to prevent odors and pests from entering from the side. In the case of the conventional example shown in FIG. 10, the drain elbow member is connected to the drain trap. By doing this, compared to the case where the drain elbow member and the drain trap are independently piped to the sewage side, the labor of piping and the number of members can be reduced, and the drain elbow member can be provided with the deodorant / insecticide function of the drain trap. Can be added.

Further, the drainage elbow member is fitted with the perforated plate member shown in FIG. This perforated plate member has a first drainage port through which the drainage from the bathtub directly flows through a pipe,
A second drain outlet provided with a float valve as a backflow preventing device for preventing backflow from the drain elbow member into which wastewater flows is opened. The first drainage port is watertightly connected to the drainage part of the bathtub through a pipe as a drainage path, drains the drainage of the bathtub to the drainage elbow member, and the second drainage port drains the drainage of the bathtub placement part to the drainage elbow member. Drained to. By doing this, the drainage of the bathtub does not run down onto the bathtub placement part, and the drainage on the bathtub placement part can be drained from the second drain port,
The cleanliness of the bathtub placement part will be maintained.

Further, when a large amount of drainage is drained from the bathtub or a large amount of drainage is drained from the washing area, the drain trap without the backflow prevention device cannot catch up with the drainage capacity of the drain trap. , Sometimes drainage flows into the drainage elbow member side connected to the drainage trap, and it may flow back to the top of the bathtub mounting part. However, if the backflow prevention device is provided in the second drainage port as described above, the float valve Rises due to the buoyancy of the drainage and closes close to the drainage inlet of the second drainage outlet. As a result, even if the drainage flows back to the drainage elbow member, the drainage in the drainage elbow member does not flow back onto the bathtub mounting portion, and the bathtub mounting portion is kept clean.

[0005]

However, the drainage device having the above structure has the following problems. Figure 10
As shown in, when the construction of the waterproof pan and bathtub is completed,
The drainage part of the bathtub and the first drainage port of the plate member are watertightly connected by a pipe, and in particular, the pipe is arranged so as to cover the plate member, which makes it difficult to remove the plate member. Under such a circumstance, the waterproof pan can be easily cleaned, but it is almost impossible to clean the irremovable eye plate member, especially the backflow preventer incorporated therein, which is extremely unsanitary. Met.

[0006] Further, it has been attempted to use the plate member as a separate member from the backflow preventing device, but it could not be carried out for the following reasons.

When the plate member is attached to the inflow port of the drainage device, it is usually mounted by fitting the inclination provided on the side surface of the plate member and the unevenness provided at the inflow port.
When mounting by this fitting, the direction of the plate member and the inflow port is selected from, for example, four directions. Therefore, when the first drain port is arranged in the peripheral part of the plate member, 1 The position of the drainage port is not stable with respect to the drainage equipment, and it becomes very difficult to position the pipes during construction. Therefore, as shown in FIG. 11, the position of the first drainage port has to be normally arranged at the center of the plate member, which allows the backflow prevention device described in paragraph 0003 or paragraph 0004 to be detachably mounted as a separate member. It was the reason why I couldn't. That is, 1. When the backflow prevention device is formed in a ring shape centered on the first drainage port and is detachable, the pipe cannot be removed from the center of the ring shape, so that the backflow prevention device cannot be substantially attached and detached. 2. When the backflow prevention device is formed in a shape other than the ring shape centering on the first drainage port and is removable, the direction cannot be freely selected when installing the plate member, so that the piping, bathtub, etc. can prevent backflow. In some cases, the equipment must be covered so that it covers the equipment. In this case, the backflow prevention device cannot be attached or detached because it is hindered by the piping and the bathtub.

Another problem is that the backflow prevention device uses a float valve that rises due to the buoyancy of drainage, and a fluid pressure valve that opens and closes according to the flow of water, that is, water pressure. If mixed, it acts as a fluid with a specific gravity of 1 or less as a mixture, so if it is a float valve, it loses buoyancy and does not rise, and even with a fluid pressure valve, the force to open and close the valve becomes weak and it does not work. In some cases, the backflow prevention device did not function, drainage passed through the backflow prevention device, and backflowed to the bath pan portion of the waterproof pan, and the waterproof pan was contaminated.

When a float valve is used in the backflow prevention device, the float valve is usually provided with a shaft portion which serves as a guide for vertical movement for the following reasons. Due to the nature of the backflow prevention device, the drainage inlet must be smaller than the float valve so that it is closed by the float valve when a backflow occurs, while the drainage outlet is not normally closed by the float valve during drainage. So it must be larger than the float valve. The casing that houses the float valve is sized to match the outlet of the drainage, so if there is no shaft, the float valve will be misaligned and the outlet of the drainage will not be closed correctly when backflow occurs. Occurs. By the way, in such a case, when the float valve is tilted, the edge portion of the shaft hole of the float valve may be caught on the shaft portion, resulting in malfunction. For this reason, the float valve has a circular shape, and a shaft hole is provided at the center of the float valve so that buoyancy can be obtained in a well-balanced manner and the float valve is prevented from tilting.

However, if the second drainage port is constituted only by the circular opening provided between the outer edge of the first drainage port and the outer edge of the perforated plate member, the opening area is small and there is a problem in drainage performance. Therefore, when the float valve is substantially incorporated in the perforated plate member, there is no choice but to use a ring shape having the first drainage port as an axis. In addition to the reason described in paragraph 0007, the float valve is used. It was difficult to attach and detach the backflow prevention device. The present invention has been researched and developed to solve the above problems, and Maintains the cleanability of the backflow prevention device of the plate member, 2. 2. Prevent backflow from drainage equipment to the waterproof pan. Improving the drainage performance of the backflow prevention device of the plate member,
The drainage device that satisfies the above three points is provided.

[0011]

A drainage device according to claim 1 is
A drainage device, which is attached to a waterproof pan (P) having an opening in a mounting part (W) and discharges drainage of equipment mounted on the waterproof pan (P) to the sewer side, the waterproof pan (P)
Drainage equipment having an inflow port (1) for inflowing the above drainage and an outflow port (2) for discharging the drainage and having a trap function with a sealing water, and the drainage from the facility equipment to the drainage equipment A drainage channel (3) for draining the water, a first drainage port (5) for draining the drainage from the drainage route (3) and a second drainage port (6) for draining the drainage from the waterproof pan (P) are opened. And in contact with the inlet (1) in a watertight and directional manner, and is impossible or difficult to remove from the inlet (1) of the drainage device after the installation of the equipment is completed. The drainage from the waterproof pan (P), which is detachably and watertightly attached to the plate member (4) which becomes the second drainage port (6) of the plate member (4), drains to the drainage device. However, the reverse flow of the drainage from the drainage device to the waterproof pan (P) is prevented. In the drainage device comprising a stop device (7), the backflow prevention device (7) comprises a casing (8) having a drainage inlet (9) in an upper part and a drainage outlet (10) in a lower part, The drainage device is characterized in that the drainage outlet (10) of the casing (8) is at a height equal to or lower than the water level of the sealing water in the drainage device.

The drainage device according to the second aspect is mounted on a waterproof pan (P) having an opening at the mounting portion (W), and drains the wastewater of the equipment placed on the waterproof pan (P) to the sewer side. A drainage device provided with an inflow port (1) into which the wastewater on the waterproof pan (P) flows and an outflow port (2) to discharge the wastewater, and the drainage from the facility device, A drainage route (3) for draining to the drainage device, and a first drainage port (5) for draining drainage from the drainage route (3)
And a second drainage port (6) for draining the drainage from the waterproof pan (P) is opened, and the second drainage port (6) is watertightly and directionally contact-fitted to the inflow port (1), and at the same time the After completion of the construction, the plate member (4), which is impossible or difficult to remove from the inlet (1) of the drainage device, and the second drain port (6) of the plate member (4) are detachable and Drainage from the waterproof pan (P), which is attached in a watertight manner, is drained to drainage equipment, and the waterproof pan (P) is drained from the drainage equipment.
A backflow prevention device (7) for preventing backflow of drainage to the backflow prevention device (7).
Is a casing (8) having a drainage inlet (9) in the upper part and a drainage outlet (10) in the lower part, and a taper from the drainage outlet (10) provided in the casing (8) toward the drainage inlet (9). A float valve (11) provided up and down by a buoyancy of drainage, which is provided in the casing (8) with a tapered surface;
It is a drainage device characterized by comprising.

According to a third aspect of the present invention, the drainage device is attached to a waterproof pan (P) whose mounting portion (W) is open, and the drainage of equipment installed on the waterproof pan (P) is discharged to the sewer side. And a drainage device having an inlet (1) into which the wastewater on the waterproof pan (P) flows and an outlet (2) to discharge the wastewater, and having a trap function with a sealing water. , A drainage route (3) for draining the drainage from the equipment to the drainage device, and the drainage route (3)
The first drainage port (5) for draining the drainage from the water and the second drainage port (6) for draining the drainage from the waterproof pan (P) are opened, and the inlet (1) is watertight and directional. A perforated plate member (4) that is freely contact-fitted and that is impossible or difficult to remove from the inflow port (1) of the drainage device after the installation of the equipment is completed, and the perforated plate member (4). )
The drainage from the waterproof pan (P), which is detachably and watertightly attached to the second drainage port (6) of the above, drains to the drainage device, and the backflow of the drainage from the drainage device to the waterproof pan (P) occurs. A backflow prevention device (7) for preventing a backflow prevention device (7), wherein the backflow prevention device (7) has a casing (8) having a drainage inlet (9) at an upper portion and a drainage outlet (10) at a lower portion. , A drainage outlet (1) provided in the casing (8)
0) toward the drainage inlet (9), and a float valve (11) provided inside the casing (8) that moves up and down by the buoyancy of drainage, and the casing (8) The drainage outlet (10) of (1) is a height below the water level of the sealing water in the drainage device.

The drainage device according to claim 4 is the drainage device according to any one of paragraphs 0011 to 0013, wherein the drainage device is a drainage trap (12).

According to a fifth aspect of the present invention, there is provided the drainage device, wherein the drainage device is a drainage elbow member (13) connected to a drainage trap (12). It is the drainage device described in.

[Detailed Description of the Invention] An embodiment of the present invention will be described below with reference to the drawings shown in FIGS. 1 to 9. In the embodiment of the present invention shown in FIGS. 1 and 2, a bathtub (B) as an equipment, a waterproof pan (P) on which the bathtub (B) is placed, and drainage from the bathtub (B) will be described later. Drain elbow member (13)
A drainage path (3) for draining to the sewage, a drainage elbow member (13) as a drainage device for draining drainage from the bathtub (B) and the waterproof pan (P) to the sewage side, and a drainage elbow member (1)
3) a perforated plate member (4), and a backflow prevention device (7) detachably provided on the perforated plate member (4),
The drainage elbow member (13) comprises a drainage trap (12) for draining the drainage to the sewage side. The structure of each member is described below. The bathtub (B) has a drainage part (B ') that opens the drainage in the bathtub to the outside of the bathtub, and has a plug (not shown) for storing and draining the water in the bathtub (B). I have it. The waterproof pan (P) includes a bathtub placing portion (Pa) on which a bathtub is placed and a washing place portion (Pb), and the attaching portion (Wa) is attached to each of the bathtub placing portion (Pa) and the washing place portion (Pb). , Wb) are opened, and the bathtub mounting portion (Pa) is further opened.
The drainage elbow member (13) is attached to the side attachment part (Wa), and the drainage trap (1) is attached to the attachment part (Wb) on the washing place (Pb) side.
2) are attached respectively. The drainage path (3) has a cylindrical drain plug (3a) having a flange, and a cylindrical connection pipe (3) whose one end is connected to the lower end of the drain plug (3a).
b) and. The drain plug (3a) is the bathtub (B)
The flange is locked to the drainage part (B ′) of the above, and is fixed from below through the bathtub (B). In addition, connection pipe (3
The other end of b) is watertightly connected to a first drainage port (5) of a perforated plate member (4) described later. The drain elbow member (13) is
A drainage elbow member that is attached to the attachment portion (Wa) of the bathtub placement portion (Pa), and has an inlet (1) into which drainage from the bathtub (B) and drainage from the bathtub placement portion (Pa) flow in. (1
3) Consists of an outlet (2) for draining the drainage inside to a drain trap (12). The drain trap (12) is attached to the washing place (Pb), and the washing place (Pb)
From the drainage elbow member (13) and drainage from the drainage elbow member (13) to the sewage side. This drain trap (12)
As described in the conventional example, it has a sealing water from the sewage side to prevent insects and odors. In addition, the drain trap (1
Since 2) and the drain elbow member (13) are connected by a pipe such as a pipe, sealing water is also stored in the drain elbow member (13). The perforated plate member (4) is a member attached to the inflow port (1) of the drain elbow member (13), and as shown in FIG. 5, the first drain port () into which the waste water of the bathtub (B) flows. 5) and the second drainage port (6) into which the drainage from the bathtub placement portion (Pa) flows is opened.
The first drain port (5) is opened at a position eccentric from the center of the perforated plate member (4), and the second drain port (6) is opened in a space other than the first drain port (5) in a substantially fan shape. There is. Further, a soft watertight member (14) is provided on the outer peripheral surface of the plate member (4), and when the plate member (4) is attached to the inlet (1) of the drain elbow member (13), the watertight member ( When the inlet 14 is watertightly fitted into the inlet 1, the perforated plate member 4 can be detachably and directionally attached. The backflow prevention device (7) has a casing (8) having a drainage inlet (9) through which drainage flows in and an drainage outlet (10) through which drainage drains out, and a float provided in the casing (8). Valve (11). The casing (8)
Is a fan shape in a plan view, the drainage outlet (10) is configured in a grid, and the drainage inlet (9) has a handle portion (1) extending upward.
5) is provided. Further, the casing (8) forms a taper surface that tapers from the drain outlet (10) toward the drain inlet (9). In addition, in this embodiment, the total height of the backflow prevention device (7) is made higher than the total height of the perforated plate member (4), and when the drainage outlet (10) is placed in the sealed water at the completion of the construction, The bottom surface of the perforated plate member (4) is configured so as not to be placed in the sealing water. The member that is constantly immersed in the sealing water becomes more dirty and deteriorated than the member that is not always immersed in the sealing water. However, in this embodiment, the plate member (4) that is difficult to clean and replace is always sealed. Only the backflow prevention device (7), which is easy to clean and replace without being immersed in the water, is always immersed in the sealed water, which improves the cleanliness and cleanability. Further, a soft watertight member (14) is provided on the outer peripheral surface of the casing (8), and the soft watertight member (14) is provided on the second side of the perforated plate member (4).
It is detachably and watertightly fitted in contact with the drain port (6). Further, the drainage outlet (10) of the backflow prevention device (7) is configured to be at a position below the water level of the sealed water, which is indicated by WL in the drawing when the construction is completed.

Next, the construction procedure and action of each member will be described.
The drain elbow member (13) and the drain trap (12) are attached to the respective mounting portions (Wa, Wb) of the waterproof pan (P), and the drain elbow member (1) is attached using a member such as a pipe.
3) and drain trap (12) and drain trap (12)
And the drain side pipe are connected, and the drain plug (3a) which is the drain path (3) and the connection pipe (3b) are connected to the drain part (B ') of the bathtub (B). Furthermore, drainage elbow member (1
At the inlet (1) of 3), when the construction is completed, the batting member (4) is attached while adjusting the direction so that the bathtub (B) and the drainage route (3) are not covered, and the waterproof pan (P) is attached. ) Place the bathtub (B) on the bathtub placement part (Pa). Eye plate member (4)
Since the outer peripheral surface is provided with a soft watertight member (14), the direction can be adjusted freely, so that the backflow prevention device (7) can be controlled by the bathtub (B) and the drainage path (3) as described above. It can be attached in a direction that does not prevent attachment and detachment. At the same time, the first drainage port (5) of the plate member (4) and the connection pipe (3b) of the drainage path (3) are watertightly connected.
As a result, the drainage section (B) of the bathtub (B) and the first drainage port (5) are watertightly connected to each other via the drainage path (3). ) It is drained to the drain elbow member (13) without leaking up.

The second drain port (6) of the plate member (4)
A backflow prevention device (7) is attached to the. A soft watertight member (14) is provided on the outer peripheral surface of the casing (8) of the backflow prevention device (7), and the watertight member (14) is fitted in watertight contact with the second drain port (6). Therefore, the backflow prevention device (7) can be detachably attached to the second drain port (6). Further, since the casing (8) is provided with the handle portion (15) extending upward, the backflow preventing device (7) can be easily removed from above the perforated plate member (4). As a result, the first drainage port (5) of the plate member (4) and the drainage part (B ′) of the bathtub (B) are connected to the drainage route (3).
Even if it is difficult or impossible to remove the perforated plate member (4) through the water, the backflow prevention device (7) alone can be removed from the perforated plate member (4). The backflow prevention device (7) and the float valve (11) inside the backflow prevention device (7) tend to be easily cleaned.

The embodiment of the present invention is configured as described above. The bubbles in the wastewater discharged from the bathtub (B) are usually
It is lighter than water and cannot reach below the surface,
The drainage outlet (10) of the backflow prevention device (7) as in the present invention
Is located in the sealed water, bubbles do not reach the float valve (11) side, and the float valve (11) is formed by bubbles.
It is possible to prevent the erroneous operation and prevent the backflow to the bathtub mounting portion (Pa) side.

Further, when drainage flows backward from the drainage elbow member (13) to the bathtub mounting portion (Pa) side, the float valve (11) causes the drainage outlet in the casing of the backflow prevention device as the backflow drainage rises. It goes up from (10) toward the drainage inlet (9). At this time, as shown in FIG. 3, there was a large gap horizontally between the inner surface of the casing (8) and the float valve (11) near the drain outlet (10), but near the drain outlet (9) above. As a result of the rise, as shown in FIG. 4, a gap between the inner surface of the casing (8) and the float valve (11) is formed along the tapered surface from the drain outlet (10) toward the drain inlet (9). Since it is narrowed, the float valve (11) can be watertightly adhered without being displaced in the horizontal direction, and the drainage inlet (9) can be closed. Due to this, the drainage in the drainage elbow member (13) does not flow back to the bathtub mounting portion (Pa) side. Therefore, the float valve (11) that is accurate and does not malfunction can be obtained without using the float valve (11) using the shaft. In addition, by using the float valve (11) that does not use the shaft, it is possible to achieve a large opening area of the second drain port (6), and the float valve (1) having various shapes other than the circular shape can be achieved.
1), and good drainage performance can be achieved.

While this embodiment of the invention is as described above,
The present invention is not limited to the above embodiments, and can be freely modified within the scope of the invention. For example, in the drainage device of the above embodiment, the plate member (4)
Is attached to the drain elbow member (13), but it may be attached to the drain trap (12) as shown in FIG.

Further, the drainage device of the above-mentioned embodiment uses the bathtub (B) as the equipment, but it can be used for all equipment such as a washing machine which produces drainage.

In the drainage device of the above embodiment, the soft watertight member (14) is watertightly fitted into the backflow prevention device (7) and the eyelet member (4). However, the structure is not particularly limited as long as the backflow prevention device (7) and the plate member (4) are detachably attached.

Further, the drainage device of the present invention is used for a drainage device that does not have a sealing water, and as shown in FIG. When used for drainage equipment whose position changes, the drainage outlet (10) of the backflow prevention device (7) may be arranged at a position not below the water level of the sealing water. Even in this case, by using the float valve (11) in the casing (8) provided with the tapered surface, the merit that no malfunction occurs even if the shaft is not provided is not impaired.

Further, in the above embodiment, as the structure of the backflow prevention device (7), the casing (8) is provided with a tapered taper surface from the drain outlet (10) to the drain inlet (9), and the casing (8) is provided. Float valve (11) on the inner surface
However, the structure of the backflow prevention device (7) is configured with a fluid pressure valve, or the problem of drainage performance due to the opening area is solved by increasing the size of the inlet (1) itself. If possible, as shown in FIG. 9, a backflow prevention device (7) having a shaft and provided with a float valve (11) may be adopted. Even in this case, by arranging the drainage outlet (10) in the sealed water, advantages such as not causing a malfunction even if bubbles are mixed in the drainage are not impaired.

[0026]

The drainage device provided with the backflow prevention device of the present invention has the following effects. 1. Since the backflow prevention device is detachably attached to the second drainage port of the plate member, even if it is difficult to remove the plate member when the construction is completed, the backflow prevention device, which tends to be the most unsanitary, is removed. It is possible to improve the cleanability of the backflow prevention device. 2. By positioning the drain outlet of the backflow prevention device inside the sealed water, bubbles in the drainage will not enter the backflow prevention device side, and there will be no backflow on the waterproof pan. 3. The backflow prevention device casing with a float valve
The tapered surface that tapers from the drainage outlet to the drainage inlet allows the float valve in the casing to operate accurately without malfunction even without using a shaft.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is a partially developed cross-sectional view of an embodiment of the present invention.

FIG. 3 is an enlarged view of a main part around a second drain port in a normal state of the present invention.

FIG. 4 is an enlarged view of a main part around a second drainage port when a backflow occurs according to the present invention.

FIG. 5 is a plan view of a plate member of the present invention.

FIG. 6 is a bottom view of the plate member of the present invention.

FIG. 7 is a sectional view showing an embodiment in which the present invention is applied to a drain trap.

FIG. 8 is a sectional view showing another embodiment of the present invention.

FIG. 9 is a sectional view showing another embodiment of the present invention.

FIG. 10 is a cross-sectional view showing a conventional drainage device.

11 (a) is a plan view showing a conventional perforated plate member, and FIG. 11 (b) is a cross-sectional view from the side.

[Explanation of symbols]

1 Inlet 2 outlet 3 drainage routes 3a drain plug 3b connection piping 4 plate members 5 First drainage port 6 Second drainage port 7 Backflow prevention device 8 casing 9 drainage inlet 10 drainage outlet 11 float valve 12 drain trap 13 Drain elbow member 14 Watertight member 15 Handle B bathtub B'drainage P waterproof pan Pa Bathtub mounting section Pb washroom section W mounting part Wa Bathtub mounting part side mounting part Wb Washroom side mounting part WL Sealed water surface

Claims (5)

[Claims] 1. A drainage device which is attached to a waterproof pan (P) having an opening in a mounting part (W) and discharges the drainage of equipment mounted on the waterproof pan (P) to the sewer side. A drainage device provided with an inflow port (1) for inflowing the drainage on the waterproof pan (P) and an outflow port (2) for discharging the drainage, and a drainage device having a trap function with a sealing water, and the drainage from the facility device. , A drainage route (3) for draining to the drainage device, and a first drainage port (5) for draining drainage from the drainage route (3)
And a second drainage port (6) for draining the drainage from the waterproof pan (P) is opened, and the second drainage port (6) is watertightly and directionally contact-fitted to the inflow port (1), and at the same time the After completion of the construction, the plate member (4), which is impossible or difficult to remove from the inlet (1) of the drainage device, and the second drain port (6) of the plate member (4) are detachable and Drainage from the waterproof pan (P), which is attached in a watertight manner, is drained to drainage equipment, and the waterproof pan (P) is drained from the drainage equipment.
A backflow prevention device (7) for preventing backflow of drainage to the backflow prevention device (7).
Comprises a casing (8) having a drainage inlet (9) at the top and a drainage outlet (10) at the bottom, the casing (8)
The drainage device (10) has a height equal to or lower than the water level of the sealing water in the drainage device. 2. A drainage device, which is attached to a waterproof pan (P) having an opening in a mounting portion (W) and discharges the drainage of equipment installed on the waterproof pan (P) to the sewer side. Drainage equipment provided with an inlet (1) into which drainage flows on the waterproof pan (P) and an outlet (2) to discharge drainage, and a drainage path for draining drainage from the equipment to the drainage equipment. (3) and a first drainage port (5) for draining the drainage from the drainage route (3) and a second drainage port (6) for draining the drainage from the waterproof pan (P). A perforated plate member that is watertightly and directionally fitted into the inlet (1) and cannot be removed from the inlet (1) of the drainage device after the installation of the equipment is completed. (4) and the second drainage port (6) of the perforated plate member (4)
A backflow prevention device (7) which is detachably and watertightly attached to the waterproof pan (P), drains drainage to the drainage device, and prevents backflow of drainage from the drainage device to the waterproof pan (P). And a casing (8) having a drainage inlet (9) in an upper part and a drainage outlet (10) in a lower part, and the backflow prevention device (7) provided in the casing (8). And a float valve (11) which is provided in the casing (8) and which is vertically moved up and down by the buoyancy of the drainage and which is provided from the drainage outlet (10) toward the drainage inlet (9). A characteristic drainage device. 3. A drainage device, which is attached to a waterproof pan (P) having an opening in a mounting part (W) and discharges the drainage of the equipment mounted on the waterproof pan (P) to the sewer side. A drainage device provided with an inflow port (1) for inflowing the drainage on the waterproof pan (P) and an outflow port (2) for discharging the drainage, and a drainage device having a trap function with a sealing water, and the drainage from the facility device. , A drainage route (3) for draining to the drainage device, and a first drainage port (5) for draining drainage from the drainage route (3)
And a second drainage port (6) for draining the drainage from the waterproof pan (P) is opened, and the second drainage port (6) is watertightly and directionally contact-fitted to the inflow port (1), and at the same time the After completion of the construction, the plate member (4), which is impossible or difficult to remove from the inlet (1) of the drainage device, and the second drain port (6) of the plate member (4) are detachable and Drainage from the waterproof pan (P), which is attached in a watertight manner, is drained to drainage equipment, and the waterproof pan (P) is drained from the drainage equipment.
A backflow prevention device (7) for preventing backflow of drainage to the backflow prevention device (7).
Is a casing (8) having a drainage inlet (9) in the upper part and a drainage outlet (10) in the lower part, and a taper from the drainage outlet (10) provided in the casing (8) toward the drainage inlet (9). A float valve (11) provided up and down by a buoyancy of drainage, which is provided in the casing (8) with a tapered surface;
And a drain outlet (1) of the casing (8).
0) is a drainage device characterized in that the height is below the water level of the sealing water in the drainage device. 4. The drainage apparatus according to claim 1, wherein the drainage device is a drainage trap (12). 5. The drainage device according to claim 1, wherein the drainage device is a drainage elbow member (13) connected to a drainage trap (12).