JP6986241B2 - Drainage device - Google Patents

Description

The present invention relates to a drainage device, and more specifically, when the water (water supply or water storage) in the tank exceeds an arbitrary water level set, excess water is discharged to any arbitrary water in the tank. It is about a drainage device that keeps the water level.

Conventionally, in equipment such as wash basins, sinks, and bathtubs that are equipped with a tank body and generate drainage by use (hereinafter referred to as "drainage equipment"), piping for discharging the water supply generated inside the tank body to the sewage side. (Drainage piping) is known.
The drainage pipe is provided with an opening called a drainage port on the bottom surface of the tank body, and the drainage pipe is piped from this drainage port by using the drainage pipe to discharge the water supply in the tank body to the sewage side.
By the way, while draining the internal water supply to the tank body as needed, he wants to store the water supply inside the tank body for washing and washing hair in the case of a washbasin and for bathing in the bathtub. I have a request. Therefore, there is a case where a valve member is arranged at the drainage port of the tank body, the drainage port is closed, and water is supplied to store water in the tank body.
However, if water supply is continued for water storage with the drainage port closed, more water will be stored inside the tank body and overflow from the upper edge of the tank body, damaging or soiling the drainage equipment and floor surface. There will be a situation where it will end up. In order to prevent this, in the vicinity of the upper edge of the tank body, apart from the drainage port on the bottom, when the water level in the tank body called the overflow drainage port exceeds a certain level, the height of the overflow drainage port is exceeded. There is known a drainage pipe that provides a drainage port for draining only the stored water, maintains the state of storing water in the tank body, and prevents the stored water from overflowing from the upper edge of the tank body.

Such an overflow pipe is effective in that it does not overflow the water stored in the tank, but has the following problems.
1. 1. In some cases, it was not possible to install overflow piping in the tank body. Specifically, for reasons such as improving the design, there are cases where the tank body is not originally provided with an opening for attaching an overflow drainage port, and in such a case, overflow piping cannot be performed.
2. 2. When an overflow drainage port is provided in the tank body and overflow piping is performed, the opening of the overflow drainage port is exposed inside the tank body. Since the overflow drainage port is narrow, it is difficult to clean it, and water stains and the like tend to collect in the overflow drainage port, which deteriorates the design of the tank body.

Therefore, there has been proposed a drainage device such as Patent Document 1 in which the tank body has an overflow drainage function but does not need to be provided with an overflow drainage port near the upper edge of the tank body.
The drainage device described in Patent Document 1 includes a wash bowl as a tank body, a drain port provided on the bottom surface of the wash bowl, and a valve member that closes the drain port, and the valve member has a tank body. When water is stored up to the water level you want to store in, it is equipped with a pressure valve that opens according to the water pressure at that water level. In addition, this "water level to be stored in the tank body" is hereinafter referred to as "reservoir water level". The pressure valve of Patent Document 1 is adjusted so that the water level in the tank opens when the water level reaches the water storage level.
When water is supplied to the wash bowl after the drain port is closed by the valve member, water is stored in the wash bowl, and when the water storage level is reached, the pressure valve of the valve member opens due to the water pressure of the water storage. Drain the water stored in the wash bowl to the downstream side of the drain.
When drainage through the pressure valve is gentle, when sufficient water pressure acts on the pressure valve beyond the water storage level in the wash bowl, the pressure valve opens and drainage is performed through the pressure valve. The water level in the wash bowl drops. When the water level in the wash bowl drops to the water storage level, the water pressure near the pressure valve also drops, which closes the pressure valve and stops the outflow of the stored water in the wash bowl, and the water level in the wash bowl becomes the water storage level. To maintain.
In this way, the pressure valve opens to drain water only when the water stored in the wash bowl exceeds the water storage level, so that the water level in the wash bowl is kept constant without performing overflow piping such as an overflow drain port. It is possible to keep the water level (water storage level) and prevent the water storage from overflowing from the edge of the wash bowl, which is the tank body.

JP-A-2016-204895 (6th Example)

In the above drainage device, when a large amount of drainage from the pressure valve is performed, the inside of the pipe downstream from the pressure valve becomes full, and a high negative pressure called a siphon phenomenon may occur on the downstream side.
Since the pressure valve opens when the pressure difference between the upstream and downstream of the pressure valve exceeds a certain value, even in "a state where a large negative pressure is generated on the downstream side of the pressure valve", "the pressure valve It opens in the same way as "a state in which a large positive pressure is generated on the upstream side". Therefore, when a siphon phenomenon occurs and a large negative pressure is generated on the downstream side of the pressure valve, the pressure valve remains open due to the negative pressure on the downstream side of the pressure valve regardless of the pressure due to the water level in the tank. turn into. As a result, even though the water level in the tank is as low as the stored water level or lower, the water level in the tank remains open due to the negative pressure acting on the downstream side of the pressure valve. There was a problem that it descended and the amount of water stored in the tank became insufficient.
The present invention has been invented in view of the above problems, and by using a pressure valve, the water level in the tank body is kept at a constant level when the water is stored in the tank body without adopting an overflow pipe. The purpose of the drainage device is to provide a drainage plug device for preventing the water level in the tank from becoming lower than the setting due to the siphon phenomenon.

In the present invention according to claim 1, a tank body, a drainage port provided in the tank body for discharging water in the tank body, a valve member for closing the drainage port, and a pressure from the tank body are set. A pressure valve that opens when the value is exceeded and discharges the water inside the tank to the sewage side and a pipe on the downstream side of the pressure valve are provided to prevent the outflow of drainage from the inside of the pipe to the outside of the pipe. When a negative pressure is generated in the pipe, it is composed of an intake valve that takes in air from the outside of the pipe to the inside of the pipe and relieves the negative pressure in the pipe. intake valve is a drainage device, characterized in Rukoto such provided upstream of the drain trap.

The present invention according to claim 2 is the drainage device.
The drainage device according to claim 1, wherein the pipe from the pressure valve joins the pipe from the drain port.

The present invention according to claim 3 is the drainage device.
The drainage device according to claim 1 or 2, wherein the pressure valve is provided in the valve member.

The present invention according to claim 4 is the drainage device.
The drainage device according to any one of claims 1 to 3 , wherein the intake valve is arranged in an annular shape around a pipe from the pressure valve.

The present invention according to claim 5 is the drainage device.
The drainage according to any one of claims 1 to 4 , wherein the operation of opening and closing the drain port of the valve member is performed by operating an operation unit provided at a position separated from the valve member. It is a device.

It is sectional drawing of the wash basin which adopted the drainage device of this invention. It is a reference figure which shows the member composition of the drainage device of 1st Example. It is a reference figure which shows the member composition of the intake valve member. It is sectional drawing which shows the closed state of the drainage device of 1st Example. It is sectional drawing which shows the opening state of the drainage device of 1st Example. It is sectional drawing of the main member which shows the operating state of the drainage device of 1st Example. It is a reference figure which shows the member composition of the drainage pipe of FIG. It is sectional drawing of the drainage pipe of another Example.

The first embodiment of the present invention will be described below with reference to the drawings.
The drainage pipe using the drainage device according to the first embodiment of the present invention shown in FIGS. 1 to 8 includes a washbasin S, a drainage port main body 1, an intake valve member 4, a joint member 8, and a valve described below. It is composed of a member 2, a release wire 9 as an operation transmission member, a trap pipe 12, and an operation unit 11.
The wash basin S is composed of a wash basin B as a tank body and a cabinet C having a piping space inside on which the wash basin B is placed.
The wash bowl B will be described in detail. The wash bowl B is a box body having an open upper part, and has an attachment port B1 for attaching a drainage port main body 1 on the bottom surface and an operation unit 11 for attaching an operation portion 11 on the upper peripheral edge of the opening. Each has a mounting port B2.
The drainage port main body 1 is a substantially cylindrical member that forms a drainage flow path inside, and has a drainage port 1a at the upper end of the inner flow path and a flange portion 1b protruding outward to the upper edge. A male screw is provided on the lower side surface of the portion 1b.
Further, a plate nut member 1c provided with a female screw to be screwed with the male screw of the drain port main body 1 is provided.
The intake valve member 4 is a member whose upper end is connected to the lower end of the drain port main body 1 and whose lower end is connected to the upper end of the joint member 8, and as shown in FIG. 3, the intake valve upper portion 5 and the intake valve lower portion 6 are connected. It is composed of three members, the intake valve main body 7 and the intake valve main body 7.
The intake valve upper portion 5 is a member provided with a cover portion 5a that covers the valve seat portion 6a, which will be described later, on the peripheral edge of the linear tubular body.
The intake valve lower portion 6 includes a valve seat portion 6a having a plurality of openings along the peripheral edge in the outward direction from the upper edge of the linear tubular body. A ridge is provided on the upper surface of the peripheral edge of the opening of the valve seat portion 6a to prevent the valve seat portion 6a from sticking to the intake valve main body 7.
The intake valve main body 7 is a ring-shaped thin plate member made of an elastic material such as silicon rubber.
The intake valve member 4 composed of the above members is assembled as follows.
The intake valve main body 7 is arranged on the valve seat portion 6a of the intake valve lower portion 6 so that the valve seat portion 6a of the intake valve lower portion 6 and the ring-shaped portion of the intake valve main body 7 form concentric circles. Further, the lower end portion of the pipe body of the intake valve upper portion 5 is inserted so as to pass through the center of the intake valve main body 7, and the outer end portion of the cover portion 5a of the intake valve upper portion 5 and the valve seat of the intake valve member 4 are inserted. The assembly of the intake valve member 4 is completed by airtightly and watertightly connecting the outer peripheral edge of the portion 6a. This assembly is usually performed in a factory or the like, and is carried in as an intake valve member 4 at a construction site in a completed state. The intake valve member 4 is provided with a portion that functions as an intake valve such as a valve seat portion 6a around the peripheral edge of the pipe body, and the intake valve member 4 is connected to the piping from the pressure valve 3 as described later. In this embodiment, the members are arranged in an annular shape around the pipe from the pressure valve 3.
The joint member 8 is a pipe body formed in a substantially T shape, and is composed of a main body portion 8a extending vertically and a branch pipe portion 8b extending horizontally from the side surface thereof, and is a branch. The inside of the pipe portion 8b is configured so that the push-up piece 10b of the release wire 9, which will be described later, can move forward and backward while being rotatable in an appropriate direction without tilting.
The release wire 9 is an operation transmission member for transmitting the operation applied to the operation unit 11 to the valve member 2, and is a tubular outer having rigidity in the axial direction and flexibility in the side surface direction. The tube 9a, the inner wire 9b slidably operating in the outer tube 9a, the inner wire 9b having the rigidity in the axial direction and the flexibility in the side surface direction, and the drain port 1a side end of the inner wire 9b are provided. It is composed of a push-up mechanism 10 and a cap member 9c that closes the end of the branch pipe portion. The push-up mechanism 10 will be described in detail. The push-up mechanism 10 has a tubular body portion 10a that is connected to the end of the inner wire 9b and advances and retreats in the branch pipe portion 8b in accordance with the advance and retreat of the inner wire 9b, and the tubular body portion 10a. The push-up piece 10b is rotatably supported by the push-up piece 10b, and when the tubular body portion 10a retracts toward the operation portion 11 in the branch pipe portion 8b, a part of the push-up piece 10b is in the branch pipe portion 8b. As it is stowed, its tip portion rises near the center of the main body portion 8a of the joint member 8.
Further, when the tubular body portion 10a advances toward the main body portion 8a of the joint member 8 in the branch pipe portion 8b, the tip portion of the push-up piece 10b descends near the center of the main body portion 8a of the joint member 8.
The operation unit 11 is a member attached to the operation unit attachment port B2 of the washbasin B, has a cylindrical shape, is fixed to the operation unit attachment port B2, and is connected to the outer tube 9a end of the release wire 9. It is composed of an operation unit main body 11a and a knob portion 11b to which the inner wire 9b portion is connected while moving in and out of the operation unit main body 11a.
The valve member 2 is formed of a substantially disk shape, and has a valve body 2a that watertightly closes the drainage port 1a by covering the drainage port 1a, and a pressure valve 3 provided so as to penetrate the center of the valve body 2a. A rod-shaped valve shaft 2b hanging from the center position of the lower surface of the pressure valve 3 and a perforated plate arranged on the valve shaft 2b to guide the valve shaft 2b so as not to tilt when moving up and down in the drain port main body 1. It is composed of a member 2d and a blindfold portion 2e arranged on the upper surface of the valve body 2a.
The pressure valve 3 will be described in detail. The pressure valve 3 has a through hole 3a provided in the center of the valve body 2a, a pressure valve main body 3b that closes the through hole 3a from below, and a valve body from around the through hole 3a. It is composed of a plurality of support ribs 2c extending to the central position of 2a. The support ribs 2c are assembled near the lower center of the valve body 2a and connected to the valve shaft 2b. Further, the pressure valve main body 3b can be raised and lowered in the vertical direction, and is guided so as not to cause a positional shift in the horizontal direction. A magnet (not shown) as a magnetic material is provided inside the pressure valve main body 3b and the blindfold portion 2d so as to attract each other, and the pressure valve main body 3b is provided until a constant load is applied to the pressure valve main body 3b. Is configured to be pulled up by the magnetic force of the magnet of the blindfold portion 2d to close the through hole 3a, and when a load exceeding the value set by the magnetic force is applied, the through hole is separated from the peripheral edge of the through hole 3a. It forms a flow path for drainage that passes between 3a and the support rib 2c. The magnet of the pressure valve main body 3b is configured to stop at a position separated from the magnet of the blindfold valve 2d to some extent even when the through hole 3a is closed so as not to approach the magnet any further. Since the magnetic force of the magnet is inversely proportional to the square of the distance, if the structure is such that the magnets acting on the pressure valve 3 are close to each other until they come into close contact with each other, the attractive force due to the magnetic force is extremely increased, and at least the water pressure of the stored water in the wash bowl B is increased. It becomes a strength that is almost impossible to separate with such a method. Therefore, in the pressure valve 3 of the present embodiment, the magnets are sufficiently separated from each other, and the distance between the magnets is secured so that the strength of the magnets acts approximately in proportion to the distance.
Further, the load acting on the pressure valve main body 3b can be obtained from the own weight of the pressure valve main body 3b, the area of the pressure valve main body 3b in contact with the water storage, and the water pressure acting on the valve member 2, and the own weight of the pressure valve main body 3b and The area of the pressure valve body 3b that comes into contact with the water storage does not change, and the pressure (water pressure) acting on the valve member 2 body is proportional to the water level of the washbasin B, so the magnetic force strength of the magnet used for the pressure valve 3 is adjusted. By doing so, the pressure valve 3 can be made to open when the desired water level is reached.
Since the pressure valve 3 of this embodiment opens and closes according to the water pressure derived from the arbitrarily set water level and discharges the stored water to the sewage side at the time of opening, the pressure valve 3 of this embodiment is used when the pressure from the inside of the tank exceeds the set value. It is a pressure valve 3 that opens and discharges the water in the tank to the sewage side.
Further, the blindfold portion 2e is a disk-shaped portion having a diameter larger than the outer periphery of the flange portion 1b of the drainage port main body 1 arranged in the upper part of the valve body 2a, and does not block the through hole 3a by a plurality of ribs. As described above, a gap is provided above the valve body 2a, and a magnet attracting the magnet of the pressure valve main body 3b is arranged inside the gap.
The trap pipe 12 is a member having a shape in which the pipe body is bent into a substantially S shape and rolled over, and the upstream end is the lower end of the joint member 8 and the downstream end is the underfloor pipe. , Are connected respectively.
Further, when the construction is completed, the wash basin S, which is a drainage device, is used, and when the drainage passes through the trap pipe 12, the drainage stays at the bent portion of the trap pipe 12 to form a full water state. This full-filled part is called a water-sealing part, and the accumulated drainage is called a water-sealing part. It has a structure that prevents odors and pests from invading the side (indoor side).

The drainage pipe adopting the drainage device of the first embodiment configured as described above is installed in the wash bowl B which is a tank body as follows. Even if not specifically described, the connection points of the respective members are watertightly connected as necessary by screw connection using an adhesive or packing.
First, the drainage port main body 1 is inserted into the mounting port B1 provided on the bottom surface of the wash bowl B, and the lower surface of the flange portion 1b is brought into contact with the upper surface of the peripheral edge of the mounting port B1.
Next, the female screw of the plate nut member 1c is screwed into the male screw of the drain port main body 1, and the peripheral edge of the mounting port B1 is sandwiched between the lower surface of the flange portion and the upper surface portion of the plate nut member 1c and fixed to the wash bowl B. do.
Next, the intake valve member 4 is connected to the lower end of the drain port main body 1.
Next, the operation unit main body 11a is fixed to the operation unit attachment port B2 of the washbasin B.
Next, the knob portion 11b is connected and fixed to the end portion of the inner wire 9b of the release wire 9 on the side that does not have the push-up mechanism 10, and then the end portion of the outer tube 9a on the same side is connected to the operation portion main body 11a. ..
Next, the push-up mechanism 10 at the end of the inner wire 9b of the release wire 9 is inserted into the branch pipe portion 8b of the joint member 8, and the end of the branch pipe portion 8b is further inserted by the cap member 9c at the end of the outer tube 9a. Block. As a result, the release wire 9 is connected to the joint member 8.
Next, the upper end of the joint member 8 is connected to the lower end of the intake valve member 4, the trap pipe 12 is further connected to the lower end of the joint member 8, and the underfloor pipe connected to the sewer side pipe is connected to the lower end of the trap pipe 12.
Further, the valve member 2 is inserted and arranged in the drainage port main body 1 from the drainage port 1a at the upper end, and the construction of the drainage pipe of the wash basin S of this embodiment is completed.
The drainage pipe is configured such that the valve member 2 is provided with a pressure valve 3 so that the drainage from the pressure valve 3 is discharged into the drainage port main body 1, so that the pipe from the pressure valve 3 is a drainage port. It is a pipe that joins the pipe from 1a. Further, since the intake valve member 4 and the trap pipe 12 are connected in this order to the pipe of the drain port main body 1, the pipe from the pressure valve 3 is provided with a drain trap, and the intake valve member 4 drains. It is a drainage pipe installed upstream of the trap.

In the drainage pipe of the wash basin S of the present embodiment configured as described above, an operation is applied to the knob portion 11b of the operation portion 11, and as shown in FIG. 4, the valve member 2 descends and the drainage port 1a. Is in a closed state. At this time, the knob portion 11b of the operation portion 11 is lowered, whereby the inner wire 9b advances to the valve member 2 side, and the inner wire 9b advances due to friction between the operation portion main body 11a and the knob portion 11b. It is maintained. Further, regarding the push-up piece 10b of the elevating member, the tip of the push-up piece 10b rotatably attached to the tubular body portion 10a is lowered because the tubular body portion 10a is advanced toward the main body portion 8a. , It is separated from the lower end of the valve shaft 2b.
When the knob portion 11b of the operation portion 11 is operated from this state to raise the knob portion 11b, the inner wire 9b and the push-up mechanism 10 at the tip thereof retract to the operation portion 11 side and are shown in FIG. As described above, the push-up piece 10b rotatably attached to the tubular body portion 10a has its tip raised as the tubular body portion 10a retracts toward the operation portion 11, and pushes up the lower end of the valve shaft 2b. As a result, the valve member 2 rises, the valve body 2a of the valve member 2 is separated from the drain port 1a, and the drain port 1a opens. At this time, the retreat of the inner wire 9b is maintained due to friction between the operation portion main body 11a and the knob portion 11b, and the open state of the drain port 1a is also maintained.
Further, at this time, when water is supplied to the wash bowl B or water is stored, the water supply or storage in the wash bowl B passes through the drain port 1a and flows into the drain port main body 1. It passes through the drain port main body 1, the intake valve member 4, the joint member 8, and the trap pipe 12, and is discharged to the sewage side via the underfloor pipe. Further, since the drainage is collected in the bent portion in the trap pipe 12, the sealed water is collected in the water-sealed portion in the trap pipe 12, and the odor from the sewage side and the invasion of pests into the indoor side are prevented.
From this state, when the knob portion 11b of the operation portion 11 is operated to lower the knob portion 11b, the inner wire 9b and the elevating mechanism at the tip thereof advance to the valve member 2 side again, as shown in FIG. As described above, the tip of the push-up piece 10b descends and separates from the lower end of the valve shaft 2b, and the drain port 1a returns to the state in which the valve body 2a is closed.
After that, the drain port 1a can be freely opened and closed by applying an operation to the knob portion 11b of the operation portion 11.

In the drainage device of this embodiment, water is supplied to the washbasin B in a state where all of the drainage port, the through hole of the pressure valve, and the intake valve shown in FIG. 6 are closed, and water is stored in the washbasin B. The water level in the wash bowl B rises, the water pressure of the stored water acts on the surface of the pressure valve main body 3b in contact with the water storage, and a load is applied to the pressure valve main body 3b. When the water level in the wash bowl B reaches the stored water level, as shown in FIG. 7, the pressure valve main body 3b descends due to the load applied to the pressure valve main body 3b and opens the through hole 3a. As a result, the water stored in the wash bowl B passes through the through hole 3a and flows into the drainage port main body 1, passes through the drainage port main body 1, the intake valve member 4, the joint member 8, and the trap pipe 12, and passes under the floor. It is discharged to the sewage side through the pipe. When the stored water is discharged, the water level in the washbasin B drops, and the water pressure acting on the pressure valve 3 and the load due to the water pressure decrease, so the pressure valve body 3b rises again and closes the through hole 3a. , Prevents the water storage from being completely drained.

Further, when draining from the through hole 3a, if there is a large amount of drainage, the pipe on the downstream side from the through hole 3a, specifically, the drain port main body 1, the intake valve member 4, the joint member 8, and the trap pipe 12 The inside of the pipe may become full and a siphon phenomenon may occur. Here, when a negative pressure is generated in the pipe on the downstream side from the through hole 3a due to the siphon phenomenon, the intake valve main body 7 rises due to the generation of the negative pressure, and intake air is taken from the opening of the valve seat portion 6a as shown in FIG. Inhalation is performed in the valve member 4 to eliminate the negative pressure. As a result, the pressure valve 3 opens and closes only by the load acting on the pressure valve body 3b without being affected by the negative pressure in the pipe, and drains until the water level becomes lower than the water storage level due to the siphon phenomenon. Does not occur.

Examples of the present invention are as described above, but the present invention is not limited to the above-mentioned examples, and can be freely changed without changing the gist.
For example, in the above embodiment, the wash bowl B is used as the tank body, but the present invention is not limited to the above embodiment and may be used for the tank body of other drainage equipment such as a sink and a bathtub. No.

Further, in the above embodiment, the pressure valve 3 is provided in the valve body 2a of the valve member 2, and is configured so that the drainage from the pressure valve 3 flows into the pipe from the drain port 1a. The present invention is not limited to the embodiment, and the flow path for the pressure valve 3 may be provided separately from the drain port 1a of the tank body. Further, the drain port 1a and the pressure valve 3 may be separately provided in the tank body and then merged.

Further, in the above embodiment, the pressure valve 3 is operated by pressing the pressure valve main body 3b against the through hole 3a by utilizing the attractive force of the magnet, but the present invention is limited to the above embodiment. Instead, the pressure valve body 3b is pressed against the through hole 3a by using the repulsion of the magnetic force or by using an elastic body such as a spring, and the through hole 3a is configured to open according to the pressure derived from the water level. Any configuration may be adopted as long as it does.

1 Drain port body 1a Drain port 1b Fitting part 1c Plate nut member 2 Valve member 2a Valve body 2b Valve shaft 2c Support rib 2d Dish plate member 2e Blind part 3 Pressure valve 3a Through hole 3b Pressure valve body 4 Intake valve member 5 Intake valve Upper part 5a Cover part 6 Intake valve lower part 6a Valve seat part 7 Intake valve body 8 Fitting member 8a Main body part 8b Branch pipe part 9 Release wire 9a Outer tube 9b Inner wire 9c Cap member 10 Push-up mechanism 10a Cylindrical part 10b Push-up piece 11 Operation Part 11a Operation part main body 11b Knob part 12 Trap piping S Wash basin B Wash basin B1 Mounting port B2 Operation part mounting port C Cabinet

Claims (5)

With the tank body,
A drainage port provided in the tank body to drain water in the tank body,
A valve member that closes the drainage port and
A pressure valve that opens when the pressure from inside the tank exceeds the set value and discharges the water inside the tank to the sewage side.
It is installed in the pipe on the downstream side of the pressure valve to prevent the outflow of drainage from the inside of the pipe to the outside of the pipe, and when negative pressure is generated in the pipe, it takes in air from the outside of the pipe to the inside of the pipe. With an intake valve that relieves the negative pressure of
Consists of
With the drain trap is provided in the piping from the pressure valve, the intake valve, the drainage device according to claim Rukoto such provided upstream of the drain trap. In the above drainage device
The drainage device according to claim 1, wherein the pipe from the pressure valve joins the pipe from the drain port. In the above drainage device
The drainage device according to claim 1 or 2, wherein the pressure valve is provided in the valve member. In the above drainage device
The drainage device according to any one of claims 1 to 3 , wherein the intake valve is arranged in an annular shape around a pipe from the pressure valve. In the above drainage device
The drainage according to any one of claims 1 to 4 , wherein the operation of opening and closing the drain port of the valve member is performed by operating an operation unit provided at a position separated from the valve member. Device.

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