JP6826465B2 - Pipe fittings, drainage structure and drainage pipe connection structure - Google Patents

Description

The present invention relates to a pipe joint, a drainage structure, and a drainage pipe connection portion structure provided in a drainage flow path for discharging drainage drainage generated in equipment such as a water heater, an air conditioner, and a refrigerator by natural drainage.

Drain drainage generated by dew condensation on equipment such as latent heat recovery type water heaters, air conditioners such as air conditioners, refrigerators, and cooling towers is discharged through a drainage channel consisting of drainage pipes. As described in Patent Document 1, for example, the drainage pipe is piped in the vertical direction along the wall surface of the building, and the drainage drainage is usually naturally drained from the upstream side to the downstream side to a gutter, a rainwater gutter, or the like. It has been discharged.

Here, the drainage flow path is generally a rigid drainage pipe having no flexibility and is connected by a pipe joint, but there is a step or obstacle on the wall surface in the middle of the flow path and it is necessary to bypass it. Flexible drainage pipes such as corrugated pipes and bellows pipes are used at places where they move to another wall surface. In the drainage flow path where both the hard drainage pipe and the flexible drainage pipe are used, more pipe joints are used to connect the drainage pipes to each other. In such a drainage flow path, when the hard drainage pipe and the flexible drainage pipe are connected, the hard drainage pipe is piped on the upstream side and the flexible drainage pipe is piped on the downstream side across the pipe joint. In some cases, on the contrary, a flexible drain pipe is piped on the upstream side of the pipe joint and a hard drain pipe is piped on the downstream side.

Japanese Unexamined Patent Publication No. 2011-162947

However, the pipe joint that connects different types of hard drainage pipes and flexible drainage pipes needs to be used properly depending on whether the hard drainage pipe or the flexible drainage pipe is on the upstream side or the downstream side of the pipe joint. was there. For this reason, connection work and parts management are troublesome, and the cost is high.

In addition, in order to prevent water leakage at the connection point with the drain pipe such as a flexible drain pipe, the pipe joint may have a packing inserted in the gap between the outer wall of the pipe joint and the outer surface of the drain pipe. There are many. However, in the case where the drainage drainage generated by dew condensation or the like is naturally discharged from the upstream side to the downstream side as in the present application, a large amount of water pressure is not applied to the connection portion between the pipe joint and the drainage pipe. Considering the cost of parts and maintenance such as replacement due to deterioration, it is convenient if packing is not used.

Therefore, the present invention connects the inflexible drainage pipe and the flexible drainage pipe in the drainage flow path for draining the drainage drainage by natural drainage, and the drainage pipes are upstream and downstream, respectively. Providing pipe joints, drainage structures and drainage pipe connection structures that can be used in common when connected to any of the sides and do not require the insertion of packing between the flexible drainage pipe. Is the subject.

The pipe joint according to claim 1 is provided in the drain drainage flow path of the device.
A first connection port is provided on one end side to which a non-flexible drainage pipe or drainage pipe joint is connected.
On the other end side, a second connection port is provided, in which concave portions and convex portions are alternately formed on at least one of the outer surface and the inner surface to connect a flexible drainage pipe having flexibility.
The second connection port includes an outer cylinder into which the end of the flexible drain pipe is inserted, an inner cylinder inserted into the end of the flexible drain pipe inserted in the outer cylinder, and the inner cylinder. An engaging portion that engages with the recess of the flexible drain pipe to prevent the flexible drain pipe from coming off is provided.
The drainage space formed inside the pipe joint and the outside of the pipe joint are communicated with each other because the outer cylinder of the second connection port and the outer surface of the flexible drain pipe are in a non-watertight state. And
The drainage overflow edge formed at the opening edge portion of the inner cylinder is located behind the second connection port with respect to the drainage overflow edge formed at the opening edge portion of the outer cylinder and the engaging portion. ..

As a result, in the drainage flow path for draining drainage by natural drainage, the second connection port of the pipe joint is provided with an outer cylinder and an inner cylinder, and the drainage overflow edge of the inner cylinder is at the end of the flexible drainage pipe. Since it is inserted, when the second connection port to which the flexible drain pipe is connected is used on the upstream side of the flexible drain pipe with the first connection port facing upward, the first connection port is used from the upstream. The drainage drainage that has flowed in through the inner cylinder is prevented from entering the outer flexible drainage pipe side due to the presence of the inner cylinder, and flows between the outer cylinder and the flexible drainage pipe and flows out to the outside of the pipe joint. It's hard to happen. Further, in a direction of the first connection port and the lower, when using the second connection port on the downstream side of the flexible drainage tube drainage overflow edge of the inner tube, drainage overflow edge and the engagement of the outer cylinder located deeper in the second connection port than parts, i.e., in the waste water overflowing lower edge and engaging portion position of the outer cylinder, a portion of the drain wastewater flowing from the flexible drainage pipe side of the inner cylinder Even if it flows to the outside and stays between the inner cylinder and the outer cylinder and overflows from the drainage overflow edge of the inner cylinder, the outer cylinder regulates the outflow to the outside of the pipe joint.

In the pipe joint of claim 2, even if the pipe joint is tilted from the vertical state to a predetermined angle, the drainage overflow edge of the inner cylinder of the second connection port is located below the drainage overflow edge of the outer cylinder of the second connection port. ..
As a result, the pipe joint can be inclined to a predetermined angle in the drainage flow path and connected to the drainage pipe. As a result, it is possible to form a drainage channel by bypassing obstacles according to the situation of the drainage drainage site, and the degree of freedom in forming the drainage channel is increased.

In the drainage structure of claim 3, a first pipe joint having the configuration of claim 1 or 2 is directly or indirectly at the first connection port under the equipment installed at the uppermost stream of the drainage flow path. Connected to
The upper end of the flexible drainage pipe having flexibility is connected to the second connection port of the first pipe joint.
A second pipe joint having the configuration of claim 1 or 2 is connected to the lower end of the flexible drainage pipe at the second connection port.
A non-flexible drainage pipe or a drainage pipe joint having no flexibility is connected to the first connection port on the downstream side of the second pipe joint.

The drainage pipe connection portion structure of claim 4 is a drainage drainage pipe to which a pipe joint is connected.
The pipe fitting
A drainage pipe made of a flexible corrugated pipe in which concave portions and convex portions are alternately formed on at least one of an outer surface and an inner surface is connected to a tubular upstream side connection port formed at one end. The drain drainage that has flowed in from the upstream connection port can be discharged from the drain drainage discharge port on the downstream side formed at the other end.
The end of the drainage pipe is inserted into the outer cylinder formed at the upstream connection port, and the end of the drainage pipe is provided at the upstream connection port with the inside of the drainage drainage discharge port. An inner cylinder having a hollow portion that communicates is inserted, and the engaging portion engages with the recess of the drain pipe to prevent the drain pipe from coming off.
The drainage overflow edge formed at the opening edge portion of the inner cylinder is located behind the drainage overflow edge formed at the opening edge portion of the outer cylinder and the upstream side connection port from the engaging portion .
Further, the drainage space formed inside the pipe joint and the outside of the pipe joint communicate with each other because the outer cylinder of the upstream connection port and the outer surface of the drain pipe are in a non-watertight state. It is something that is.
Here, the "upstream connection port" corresponds to the "second connection port" of claims 1 to 3, and the "drain drainage discharge port" is the "first connection port" and is composed of a "corrugated pipe". "Drainage pipe" corresponds to "flexible drainage pipe".

According to the present invention, in a drainage flow path for draining drainage by natural drainage, the second connection port of the pipe joint is provided with an outer cylinder and an inner cylinder, and a drainage overflow edge formed at the opening edge of the inner cylinder is acceptable. Inflexible drainage because it is inserted into the end of the flexible drainage pipe and the drainage overflow edge of the inner cylinder is located behind the drainage overflow edge and the engaging part of the outer cylinder at the second connection port. When the pipe and the flexible drain pipe are connected by a pipe joint, the drain drainage leaks to the outside of the pipe joint regardless of whether each of the drain pipes is piped on the upstream side or the downstream side of the pipe joint. Therefore, the pipe joint can be used in common regardless of whether it is used in the vertical direction, and it is not necessary to prepare and use a dedicated pipe joint according to the piping position of each drainage pipe. Therefore, connection work using pipe joints, parts management are easy, and costs can be reduced.

Further, in the drainage flow path in which drainage drainage is discharged by natural drainage without applying water pressure, drainage drainage can be performed as described above even if packing is not provided between the outer cylinder of the pipe joint and the flexible drainage pipe. The packing may be unnecessary because it can be prevented from flowing out to the outside of the pipe joint. Therefore, the cost of parts can be reduced, and maintenance such as replacement due to deterioration of the packing becomes unnecessary.

It is a side view which shows the drainage structure of embodiment of this invention. The pipe joint of FIG. 1 is shown, (a) is a perspective view, and (b) is a front view. It is sectional drawing of the pipe joint of FIG. It is a perspective view of the upper half of the drainage structure of FIG. It is sectional drawing of the upper half part of the drainage structure of FIG. It is a perspective view of the lower half of the drainage structure of FIG. It is sectional drawing of the lower half part of the drainage structure of FIG. It is explanatory drawing explaining the overflow state of the drain drainage flowing into the space between the outer cylinder and the inner cylinder when the pipe joint of FIG. 2 is connected in an inclined state.

Hereinafter, the pipe joint and the drainage structure of the embodiment of the present invention will be described with reference to the drawings.
In FIG. 1, the pipe joint 10 of the present embodiment is provided in the drain drainage flow path of the device, and has a non-flexible drainage pipe 50 having no flexibility and a flexible drainage pipe 51 having flexibility. It is for connecting. In the drainage structure 1 formed in the drain drainage flow path, the pipe joint 10 is arranged below the equipment installed on the upstream side of the drainage flow path, and the upper end of the flexible drainage pipe 51 is below the pipe joint 10. Further, the same pipe joint 10 as the pipe joint 10 is connected to the lower end of the flexible drain pipe 51 with the pipe joint 10 turned upside down, and the inflexible drain pipe 50 is connected to the lower side of the pipe joint 10. It has a connected structure. 4 and 5 show the upper half of the flexible drain pipe 51 in FIG. 1, and FIGS. 6 and 7 show the lower half of the flexible drain pipe 51. Hereinafter, each component will be described in detail.

In FIG. 1, a latent heat recovery type water heater 70 is exemplified as a device installed on the upstream side of the drainage flow path, and drainage drainage is discharged from the latent heat recovery type water heater 70. The latent heat recovery type water heater 70 is provided with a secondary heat exchanger to improve the thermal efficiency by recycling the heat that was wasted as combustion exhaust gas in the conventional water heater, and drain drainage is discharged at that time. Occur. Drain wastewater is usually acidic, but it is neutralized by a neutralizer and discharged. The maximum amount of drainage generated by the latent heat recovery type water heater 70 is set, the amount of drainage is about 0.5 to 1.5 l / day, and the quality of drainage drainage is about the same as rainwater. It is connected to the rainwater system such as the rain gutter 69 and the rainwater gutter and the drainage facility from the drainage channel and discharged.

In this embodiment, an indirect drainage device 60 is attached to the lower side of the latent heat recovery type water heater 70 via a joint 66. The indirect drainage device 60 has an upstream side cylinder portion 61 and a downstream side as shown in FIG. 5 in order to prevent sewage from flowing back from below, gas from flowing in, pests and the like invading. It is not directly connected to the cylinder portion 62, but a space S is provided between them to drain water.

That is, in FIG. 5, the indirect drainage device 60 is provided with a downstream tubular portion 62 with a space S separated from the upstream tubular portion 61, and an upper end opening of the downstream tubular portion 62 is an upstream tubular portion 61. It is a funnel-shaped receiving portion 63 having a diameter larger than that of the lower end opening of the above. The upstream side cylinder portion 61 is formed of a straight tubular inflexible drainage pipe, and the upper half portion 61a is connected to a joint 66 on the lower side of the latent heat recovery type water heater 70 by adhesion or the like. The downstream side tubular portion 62 is formed of a straight tubular inflexible drainage pipe, and the inflexible drainage pipe 50 forming the lower half portion 62a is connected to the pipe joint 10 by adhesion or the like. .. Since the space S is provided in the indirect drainage device 60 and the upstream side cylinder portion 61 and the downstream side cylinder portion 62 do not communicate with each other, even if sewage flows backward from below, the space S is outside the space S of the indirect drainage device 60. It overflows into the atmosphere from the empty discharge window 65 provided on the outer peripheral wall 64 and does not rise to the upstream device side, and pests cannot invade the device side.

The inflexible drainage pipe 50 constituting the drainage flow path is formed of a straight PVC pipe or the like having a smooth outer surface. Further, the flexible drainage pipe 51 is made of a corrugated pipe having flexibility by alternately forming concave portions and convex portions on the outer surface and the inner surface, and is made of synthetic resin or the like.

The same pipe joint 10 is used for the pipe joints 10 connected above and below the flexible drainage pipe 51. As shown in FIGS. 2 and 3, the pipe joint 10 is provided with a substantially cylindrical first connection port 20 to which the inflexible drainage pipe 50 is connected, on one end side, that is, on the lower side in FIGS. 2 and 3. A cylindrical second connection port 30 to which the flexible drain pipe 51 is connected is provided on the other end side, that is, on the upper side in FIGS. 2 and 3. Then, the second connection port 30 engages with the outer cylinder 31 into which the end of the flexible drain pipe 51 is inserted and the recess of the flexible drain pipe 51 to prevent the flexible drain pipe 51 from coming off. The engaging portion 40 and the engaging portion 40 are provided. Further, the pipe joint 10 of the present invention is provided with an inner cylinder 32 that is inserted into the end of the flexible drainage pipe 51 that is inserted into the outer cylinder 31. The pipe joint 10 is made of synthetic resin.

The outer cylinder 31 of the second connection port 30 has a substantially cylindrical shape, and its inner diameter is formed to be substantially the same as the outer diameter of the flexible drain pipe 51 inserted inside. The outer cylinder 31 has a fitting recess 33 in which fitting protrusions 41 formed at two opposite positions on the inner surface of the engaging portion 40 are fitted at two locations 180 degrees apart from the outer surface of the upper end portion in FIG. It is provided. The fitting groove 33 of the outer cylinder 31 is formed to have a predetermined length in the circumferential direction, and the fitting protrusion 41 of the engaging portion 40 is formed to be substantially half the length of the fitting concave groove 33 in the circumferential direction. By rotating the engaging portion 40 with respect to the outer cylinder 31 in the circumferential direction, the outer cylinder 31 and the engaging portion 40 can be connected to and disconnected from each other. At the upper end of the outer cylinder 31, a plurality of notches 34 into which the tip protrusions 45 of the plurality of elastic pieces 43 described later of the engaging portion 40 are fitted are formed at intervals in the circumferential direction. The opening edge at the upper end of the outer cylinder 31 is a drainage overflow edge 35.

The inner surface of the outer cylinder 31 is formed of a smooth surface without unevenness, and a sealing material such as packing is not attached between the inner surface and the outer surface of the flexible drain pipe 51 inserted inside. That is, when the flexible drain pipe 51 is connected to the pipe joint 10, the outer cylinder 31 and the outer surface of the flexible drain pipe 51 are in a non-watertight state, and the drainage formed inside the pipe joint 10 is in a non-watertight state. The space 11 and the outside of the pipe joint 10 are in a state of communicating with each other.

The engaging portion 40 is detachably attached to the upper end portion of the outer cylinder 31 of the second connection port 30. The engaging portion 40 has a substantially cylindrical shape, and a plurality of elastic pieces 43 whose tip side bends inward and outward with the upper end opening edge 42 as the base end project on the inner surface of the upper end portion in FIG. 3 at predetermined intervals in the circumferential direction. It is set up. The elastic piece 43 has a strip shape, and an engaging claw 44 that engages with a recess on the outer surface of the flexible drain pipe 51 is formed at the tip thereof, and the engaging claw 44 is the flexible drain pipe 51. By engaging with the concave portion on the outer surface, the flexible drainage pipe 51 is in a state of being prevented from coming off from the pipe joint 10. As described above, the tip protrusion 45 of the elastic piece 43 is fitted into the notch 34 of the outer cylinder 31.

The inner cylinder 32 of the second connection port 30 stands in the pipe axis direction from the annular partition portion 12 that separates the first connection port 20 and the second connection port 30 in the drainage space 11 formed inside the pipe joint 10. It is formed of a circular pipe provided, has a hollow portion 36, and has an outer diameter substantially the same as the inner diameter of the flexible drain pipe 51. The height of the inner cylinder 32 is such that the pipe joint 10 is arranged in the vertical direction upside down with FIG. 3, that is, the flexible drainage pipe 51 is inserted and connected from below as shown in FIG. In this state, when the drain drainage flows from above, it is sufficient if the drain drainage has a size that can prevent the drain drainage from flowing into the flexible drainage pipe 51 side on the outside of the inner cylinder 32. Further, the height of the inner cylinder 32 is such that the pipe joint 10 is oriented in the direction of FIG. 3 and the flexible drain pipe 51 is inserted and connected from above, and the drain drainage is shown by the arrow in the pipe joint 10. The height is set lower than the height of the outer cylinder 31 so that the drainage space 11 inside the pipe does not flow out to the outside of the pipe joint 10. In other words, the drainage overflow edge 37 formed at the opening edge of the inner cylinder 32 is deeper than the drainage overflow edge 35 formed at the opening edge of the outer cylinder 31, that is, the partition portion 12. It is formed at a position close to.

As shown in FIG. 1, the pipe joint 10 thus formed is connected as a first pipe joint 10A on the upstream side of the flexible drain pipe 51 and a second pipe joint 10B on the downstream side in the drainage flow path. Connected as. As shown in FIGS. 1, 4, and 5, the upstream first pipe joint 10A has the first connection port 20 facing the upstream side, and the first connection port 20 is the downstream side cylinder portion of the indirect drainage device 60. It is adhesively connected to the lower half 62a formed by the inflexible drain pipe 50 of 62. An upper end portion, which is one end portion of the flexible drainage pipe 51, is connected to the second connection port 30 of the first pipe joint 10A from below. The flexible drainage pipe 51 is simply inserted into the second connection port 30 of the first pipe joint 10A from below as it is, and the outer surface of the flexible drainage pipe 51 bends the elastic piece 43 of the second connection port 30 outward and the second When it is pushed into the back of the connection port 30 and the tip abuts on the partition portion 12, the engaging claw 44 of the elastic piece 43 engages with the recess on the outer surface of the flexible drain pipe 51, and the first pipe joint 10A It is connected to the retaining state.

Further, as shown in FIGS. 1, 6 and 7, the second pipe joint 10B on the downstream side and the second connection port 30 are on the upstream side at the lower end portion which is the other end of the flexible drainage pipe 51. It is oriented and connected from below. The second pipe joint 10B simply fits the second pipe joint 10B to the lower end of the flexible drain pipe 51 in the same manner as the connection of the flexible drain pipe 51 to the first pipe joint 10A. , The engaging claw 44 of the elastic piece 43 engages with the recess on the outer surface of the flexible drain pipe 51, and is connected to the flexible drain pipe 51 in a retaining state. In the second pipe joint 10B connected in this way, the first connection port 20 is bonded to an elbow 67 formed by bending the inflexible drainage pipe 50 at a right angle.

The drainage flow path is connected in the vertical direction in the order of the indirect drainage device 60, the first pipe joint 10A, the flexible drainage pipe 51, and the second pipe joint 10B from the upstream side, but after that, the elbow 67 is used. It turns from the vertical direction to the horizontal direction and is connected to the rain gutter 69 via the joint 68.

In the drainage channel configured in this way, the drainage drainage generated by the latent heat recovery type water heater 70 flows downward through the vertical portion of the drainage channel by natural drainage due to gravity without applying water pressure, and then rain gutter. It is discharged to the outside by the rainwater system using 69.

Here, in the drainage flow path, the configuration in which the second pipe joint 10B is connected to the flexible drainage pipe 51 also corresponds to the drainage pipe connection portion structure of the claim. In relation to the drainage pipe connection portion structure of the claim, the "second pipe joint 10B" corresponds to the "pipe joint" of the claim, and the "first connection port 20" is the "drainage drainage drainage" of the claim. The "outlet", the "second connection port 30" correspond to the "upstream connection port" of the claim, and the "flexible drainage pipe 51" corresponds to the "drainage pipe made of a corrugated pipe" of the claim.

Next, the operation of the pipe joint 10 and the drainage structure 1 of the present embodiment configured in this way will be described.
The amount of drainage drainage generated by the latent heat recovery type water heater 70 is small as described above, and the drainage drainage is not discharged by applying special water pressure, but is naturally drained by the vertical drop of the drainage channel. In such a drainage flow path for draining drainage by natural drainage, the second connection port 30 of the pipe joint 10 is inserted into an outer cylinder 31 into which the end of the flexible drainage pipe 51 is inserted and an outer cylinder 31. An inner cylinder 32 inserted into the end of the inserted flexible drain pipe 51 is provided, and the drainage overflow edge 37 formed at the opening edge of the inner cylinder 32 is the end of the flexible drain pipe 51. As shown in FIGS. 4 and 5, when the first pipe joint 10A was used on the upstream side of the flexible drain pipe 51, it flowed through the first connection port 20 located on the upstream side. Drain drainage does not easily flow out to the outside of the pipe joint 10.

On the other hand, as shown in FIGS. 6 and 7, when the second pipe joint 10B is used on the downstream side of the flexible drain pipe 51, the drainage overflow edge 37 of the inner cylinder 32 becomes the drainage overflow edge 35 of the outer cylinder 31. Since it is located deeper than the second connection port 30, as shown in FIG. 3, a part of the drain drainage flows to the outside of the inner cylinder 32 and is in the space between the inner cylinder 32 and the outer cylinder 31. The accumulated drainage drainage only overflows from the drainage overflow edge 37 of the inner cylinder 32 into the drainage space 11 of the second pipe joint 10B, and does not reach the drainage overflow edge 35 of the outer cylinder 31. Therefore, it is avoided that the pipe joint 10 flows out to the outside. The drainage drainage collected in the space between the inner cylinder 32 and the outer cylinder 31 without overflowing from the drainage overflow edge 37 of the inner cylinder 32 naturally evaporates and disappears.

Therefore, in both the first pipe joint 10A connected to the upstream side of the flexible drain pipe 51 and the second pipe joint 10B connected to the downstream side of the flexible drain pipe 51, the drain drainage is a pipe joint. Since it does not leak to the outside of 10, one pipe joint 10 can be commonly used as both the first pipe joint 10A and the second pipe joint 10B. Therefore, it is not necessary to prepare and use a plurality of dedicated pipe joints according to the piping position of each drainage pipe. As a result, the connection work using the pipe joint 10 can be efficiently performed, and the parts management becomes easy. Further, the component cost of the pipe joint 10 can be reduced.

Further, in the drainage flow path in which drainage drainage is discharged by natural drainage without applying water pressure, it is not necessary to provide some watertight member such as packing between the outer cylinder 31 of the pipe joint 10 and the flexible drainage pipe 51. As described above, it is possible to prevent the drainage drainage from flowing out to the outside of the pipe joint 10. Therefore, it is not necessary to insert packing or the like between the outer cylinder 31 of the pipe joint 10 and the flexible drainage pipe 51, the cost of parts can be reduced, and maintenance such as replacement due to deterioration of the packing or the like can be performed. It becomes unnecessary.

Here, when the above-mentioned second pipe joint 10B is used on the downstream side of the flexible drain pipe 51, the drainage overflow edge 37 of the inner cylinder 32 is a second connection port rather than the drainage overflow edge 35 of the outer cylinder 31. Explain that it is located in the back of 30.
In the above-described embodiment, the state in which the flexible drainage pipe 51 and the pipe joint 10 are connected in the vertical direction is described, but in the present embodiment, the drainage overflow edge 37 of the inner cylinder 32 is the outer cylinder. By being located behind the second connection port 30 from the drainage overflow edge 35 of 31, the flexible drainage pipe 51 and the pipe joint 10 are connected at a predetermined angle with respect to the vertical direction. Further, it is possible to regulate that a part of the drain drainage flows to the outside of the inner cylinder 32, overflows from the drainage overflow edge 35 of the outer cylinder 31, and flows out to the outside of the pipe joint 10.

That is, in FIG. 8, although not shown, the pipe joint 10 is connected to the lower end of the flexible drainage pipe 51 from below, and the central axis of the pipe joint 10 is inclined with respect to the vertical axis C. In FIG. 8A, the central axis of the pipe joint 10 is inclined at an angle of θ1 with respect to the vertical axis C. In the case of the pipe joint 10 of the present embodiment, θ1 is about 60 degrees in the state of FIG. 8A. In this inclination, a part of the drain drainage flows to the outside of the inner cylinder 32, collects in the space between the inner cylinder 32 and the outer cylinder 31, crosses the horizon H, and as shown by an arrow, the drainage overflow edge 37 of the inner cylinder 32. Even if the drainage drainage is discharged into the drainage space 11 of the pipe joint 10, the liquid level of the drainage drainage collected in the space between the inner cylinder 32 and the outer cylinder 31 is in the middle of the inner surface of the outer cylinder 31 side. At height. Therefore, a part of the drain drainage does not leak to the outside of the pipe joint 10 beyond the drainage overflow edge 35 of the outer cylinder 31.

In this state, the pipe joint 10 is further tilted, and when the tilt angle becomes the size of θ2 as a predetermined angle as shown in FIG. 8 (b), it accumulates in the space between the inner cylinder 32 and the outer cylinder 31. The drain drainage reaches the drainage overflow edge 35 of the outer cylinder 31 and is in a state immediately before flowing out to the outside side of the outer cylinder 31 as shown by an arrow, and when tilted further, the pipe joint is connected from the drainage overflow edge 35 of the outer cylinder 31. It will leak to the outside of 10.

From this, the drain drainage collected in the space between the inner cylinder 32 and the outer cylinder 31 can incline the pipe joint 10 until the central axis of the pipe joint 10 has an angle of θ2 with respect to the vertical axis C. It can be said that. That is, in the drainage flow path, the pipe joint 10 can be inclined to a predetermined angle θ2 and connected to the drainage pipe. Therefore, depending on the situation of the drainage drainage site, it is possible to form a drainage channel by bypassing an obstacle, and the degree of freedom in forming the drainage channel is increased.

Here, since the predetermined angle θ2 changes depending on the heights of the outer cylinder 31 and the inner cylinder 32, the pipe joint 10 may be designed with the assumed drainage flow path at the site in mind. In the case of the pipe joint 10 of the present embodiment, the predetermined angle θ2 is about 80 degrees.

By the way, in the drainage structure 1 of the above embodiment, each drainage pipe and the pipe joint 10 are connected by the combination shown in FIG. 1, but in the case of carrying out the present invention, the drainage structure 1 is not limited to this combination. It can be configured to various specifications.

Further, in the above embodiment, the lower half portion 62a formed of the inflexible drainage pipe 50 of the indirect drainage device 60 is connected to the first connection port 20 of the first pipe joint 10A, and the second pipe joint 10B is connected. A portion of the inflexible drainage pipe 50 forming the elbow 67 is connected to the 1 connection port 20, but the outer diameter of the first connection port 20 of the pipe joint 10 is connected to the inflexible drainage pipe. If it is the same as the pipe 50, it may be connected by interposing various joints such as couplings between them instead of the inflexible drain pipe 50.

In addition, although the first pipe joint 10A is indirectly connected to the latent heat recovery type water heater 70 via the indirect drainage device 60 and the joint 66, it may be directly connected to the latent heat recovery type water heater 70. ..

Further, the first connection port 20 of the pipe joint 10 and the inflexible drainage pipe 50 which is a straight pipe are connected by adhesion, but the present invention is not limited to this, and these are connected by a mere press-fitting means. It may be connected by other means such as engagement.

The flexible drainage pipe 51 has concave portions and convex portions alternately formed on the outer surface and the inner surface, but is a double pipe of an outer layer and an inner layer, and has concave portions and convex portions only in one of the outer layer and the inner layer. The portions may be formed alternately.

Further, in the drainage channel of the above embodiment, the drainage drainage is discharged by connecting the downstream end to the rain gutter 69, but it can also be connected to a rainwater system such as a rainwater gutter and discharged. , It may be guided to a drain pan and discharged, or it may be connected to another drainage facility and discharged.

In the above embodiment, the drain drainage is illustrated by the latent heat recovery type water heater 70, but the present invention includes dew condensation water, a refrigerator, a cooling tower, a refrigerant and heat generated by an air conditioner or the like. The same can be applied to the case of discharging drainage wastewater such as wastewater generated by a device that uses water as a medium.

1 Drainage structure 32 Inner cylinder 10 Pipe joint 35 Drainage overflow edge of outer cylinder 10A 1st pipe joint 36 Hollow part 10B 2nd pipe joint 37 Drainage overflow edge of inner cylinder 11 Drainage space 40 Engagement part 20 1st connection port 50 Non Flexible drain pipe 30 Second connection port 51 Flexible drain pipe 31 Outer cylinder 70 Latent heat recovery type water heater

Claims (4)

It is a pipe joint provided in the drain drainage flow path of the equipment.
A first connection port is provided on one end side to which a non-flexible drainage pipe or drainage pipe joint is connected.
On the other end side, a second connection port is provided, in which concave portions and convex portions are alternately formed on at least one of the outer surface and the inner surface to connect a flexible drainage pipe having flexibility.
The second connection port includes an outer cylinder into which the end of the flexible drain pipe is inserted, an inner cylinder inserted into the end of the flexible drain pipe inserted in the outer cylinder, and the inner cylinder. An engaging portion that engages with the recess of the flexible drain pipe to prevent the flexible drain pipe from coming off is provided.
The drainage space formed inside the pipe joint and the outside of the pipe joint are communicated with each other because the outer cylinder of the second connection port and the outer surface of the flexible drain pipe are in a non-watertight state. And
The drainage overflow edge formed at the opening edge portion of the inner cylinder is located behind the second connection port with respect to the drainage overflow edge formed at the opening edge portion of the outer cylinder and the engaging portion . A pipe fitting characterized by. The drainage overflow edge of the inner cylinder of the second connection port is characterized in that it is located below the drainage overflow edge of the outer cylinder of the second connection port even if the pipe joint is tilted from a vertical state to a predetermined angle. The pipe fitting according to claim 1. A first pipe fitting having the configuration of claim 1 or 2 is directly or indirectly connected at the first connection port to the lower side of the equipment installed at the uppermost stream of the drainage channel.
The upper end of the flexible drainage pipe having flexibility is connected to the second connection port of the first pipe joint.
A second pipe joint having the configuration of claim 1 or 2 is connected to the lower end of the flexible drainage pipe at the second connection port.
A drainage structure characterized in that a non-flexible drainage pipe or a drainage pipe joint is connected to a first connection port on the downstream side of the second pipe joint. It is a drainage pipe connection structure in which a pipe joint is connected to the drainage pipe of drainage drainage.
The pipe fitting
A drainage pipe made of a flexible corrugated pipe in which concave portions and convex portions are alternately formed on at least one of an outer surface and an inner surface is connected to a tubular upstream side connection port formed at one end. The drain drainage that has flowed in from the upstream connection port can be discharged from the drain drainage discharge port on the downstream side formed at the other end.
The end of the drainage pipe is inserted into the outer cylinder formed at the upstream connection port, and the end of the drainage pipe is provided at the upstream connection port with the inside of the drainage drainage discharge port. An inner cylinder having a hollow portion that communicates is inserted, and the engaging portion engages with the recess of the drain pipe to prevent the drain pipe from coming off.
The drainage overflow edge formed at the opening edge portion of the inner cylinder is located behind the drainage overflow edge formed at the opening edge portion of the outer cylinder and the upstream side connection port from the engaging portion .
Further, the drainage space formed inside the pipe joint and the outside of the pipe joint communicate with each other because the outer cylinder of the upstream connection port and the outer surface of the drain pipe are in a non-watertight state. Drainage pipe connection structure characterized by being

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