JP6886497B2 - Indirect drainage fittings and equipment installation structure - Google Patents

Description

The present invention relates to an indirect drainage joint for indirectly draining drainage from an apparatus to a drainage pipe.

For example, in a device such as a gas water heater having a latent heat recovery mechanism, drainage drainage, which is condensed water derived from gas combustion, is generated by a mechanism for improving thermal efficiency as compared with the conventional case. Such drainage drainage is regulated to be indirectly drained to a designated drainage facility in consideration of adverse effects on the environment. This indirect drainage is to open the drainage route to the atmosphere once to prevent the backflow of the drainage due to hygiene problems, and then drain the drainage to the drainage facility along the drainage route. Then, various indirect drainage joints are used to indirectly drain the drainage from the equipment to the drainage pipe.

For example, Patent Document 1 discloses an indirect drainage device (indirect drainage joint) (A) for indirectly draining drainage from an apparatus into a drainage pipe. The indirect drainage device (A) is substantially vertically and substantially downward from the periphery of the main body (2) in which the drainage port space (1) is formed and the inflow port (2b) of the main body (2). The insertion guide (3) into which the pipe (B) that extends and extends from the device is inserted, and the elastic force that bends when the pipe (B) is inserted and is pushed by the pipe (B) and is generated by the bending deformation. It includes an elastic piece (3b) that holds the pipe (B). An inflow port (2b) is formed in the center of the upper surface portion (2A) of the main body portion (2). A vent (2c) is formed on the side surface of the main body (2) to communicate the inside and the outside. At the lower part of the main body (2), an outlet (2d) for draining the drainage opened downward is formed. In the indirect drainage joint (A), drainage from the device flows in through the inflow port (2b), passes through the drainage port space (1) of the main body (2), and flows from the outflow port (2d) to the drainage pipe. Discharge. On the other hand, when the drainage flows back from the drainage pipe, the drainage is discharged from the vent (2c) on the side surface of the main body (2) so as not to reach the device side. The reference numerals of Patent Document 1 are shown in parentheses.

Japanese Unexamined Patent Publication No. 2011-162947

In the indirect drainage joint of Patent Document 1, the inflow port (2b) and the outflow port (2d) are arranged so as to separate the drainage port space (1). Then, the drainage flowing out from the inflow port (2b) directly flows down to the outflow port (2d) through the drainage port space (1). Therefore, by the time the drainage flowing down from the inflow port (2b) reaches the receiving portion of the outflow port (2d) through the drainage port space (1), water spray or the like is generated and is scattered to the outside of the drainage port space (1). There was a risk. In particular, when the amount of drainage from the equipment is large, when strong drainage vibration occurs, or when the joint for indirect drainage is tilted, the drainage that flows out from the inflow port (2b) to the drainage port space (1) The problem is that it spreads to the side and scatters to the side through the vent (2c), polluting the floor and the like.

The present invention has been made to solve the above problems, and an object of the present invention is an indirect drainage joint that suppresses the scattering of drainage from an apparatus and indirectly drains water to a drainage pipe, and an apparatus using the indirect drainage joint. To provide an installation structure.

The indirect drainage joint according to claim 1 is an indirect drainage joint for indirectly draining drainage from equipment to a drainage pipe.
An inflow section that is connected to a separate discharge section or joint of the device and has an upstream connection port that allows drainage from the device to flow in.
A water flow cylinder portion that is integrally connected to the inflow portion, communicates with the inflow portion, and discharges drainage from the upstream side connection port downward.
The receiving part that receives the drainage from the flowing water cylinder part and
A drainage unit that is integrally connected to the receiving portion, has a downstream connection port that is directly or indirectly connected to the drainage pipe, and communicates with the receiving portion to discharge wastewater to the drainage pipe. ,
A peripheral wall portion that interpolates the water flow cylinder portion, connects the inflow portion and the receiving portion, provides one or a plurality of openings on the side, and defines a drainage port space inside is provided.
The inflow portion connects the discharge portion or the joint of the device on the upstream side of the lower end of the water flow cylinder portion, the water flow cylinder portion extends toward the receiving portion in the drain port space, and the water flow cylinder portion. The lower end of the portion and the receiving portion are separated from each other, and the opening extends at least between the receiving portion and the lower end of the water flow cylinder portion, and is opened so as to discharge the backflow drainage .
The lower end of the water flow cylinder portion is located above the receiving port of the receiving portion so that the backflow drainage is discharged from the opening without touching the lower end of the water flowing cylinder portion. The distance between the lower end and the receiving port is not more than half the height of the drainage port space.
The indirect drainage joint according to claim 2 is an indirect drainage joint for indirect drainage of drainage from equipment to a drainage pipe.
An inflow section that is connected to a separate discharge section or joint of the device and has an upstream connection port that allows drainage from the device to flow in.
A water flow cylinder portion that is integrally connected to the inflow portion, communicates with the inflow portion, and has an outflow port that allows drainage from the upstream connection port to flow downward.
The receiving part that receives the drainage from the outlet and
A drainage unit that is integrally connected to the receiving portion, has a downstream connection port that is directly or indirectly connected to the drainage pipe, and communicates with the receiving portion to discharge wastewater to the drainage pipe. ,
A peripheral wall portion that interpolates the water flow cylinder portion, connects the inflow portion and the receiving portion, provides one or a plurality of openings on the side, and defines a drainage port space inside is provided.
The inflow portion connects the discharge portion or the joint of the device on the upstream side of the outflow port of the water flow cylinder portion, and the water flow cylinder portion extends toward the receiving portion in the drain port space. The opening is sized to discharge the backflow drainage so that the outlet is exposed from the opening .
The lower end of the water flow cylinder portion is located above the receiving port of the receiving portion so that the backflow drainage is discharged from the opening without touching the lower end of the water flowing cylinder portion. The distance between the lower end and the receiving port is not more than half the height of the drainage port space.

Indirect drainage fitting according to claim 3, in an indirect drainage fitting according to claim 1 or 2, the distance wastewater falls from the outlet flows into receptacle of the receiving portion without splashing out of the opening The outlet and the socket are arranged close to each other, and the outlet and the socket are separated from each other at a distance where the drainage overflowing from the socket when the drainage flows back flows out from the opening without touching the outlet. It is characterized by.

The indirect drainage joint according to claim 4 is the indirect drainage joint according to any one of claims 1 to 3, characterized in that the proportion of openings is larger than the proportion of meat portions in the peripheral wall portion. To do.

The indirect drainage joint according to claim 5 is the indirect drainage joint according to any one of claims 1 to 4, in which the receiving portion of the receiving portion and the outlet of the flowing water cylinder portion face each other and are concentric with each other. It is located and is characterized in that the diameter of the socket is larger than the diameter of the outlet.

The indirect drainage joint according to claim 6 is the indirect drainage joint according to any one of claims 1 to 5, and the distance between the lower end of the water flow cylinder portion and the receiving portion of the receiving portion is the distance of the drainage port space. It is characterized by being less than half the height.

The indirect drainage joint according to claim 7 is the indirect drainage joint according to any one of claims 1 to 6, wherein the opening extends from the receiving port of the receiving portion to the vicinity of the base end of the flowing water cylinder portion. It is characterized by doing.

The indirect drainage joint according to claim 8 is the indirect drainage joint according to any one of claims 1 to 7, in which a net-like body is arranged on the outer surface of the peripheral wall portion, and one or more depending on the net-like body. It is characterized in that the opening is covered.
The indirect drainage joint according to claim 9 is the indirect drainage joint according to any one of claims 1 to 8, wherein a water passage port is provided between the inflow portion and the water flow cylinder portion. The inflow portion is characterized in that the discharge portion or the joint of the device is connected on the upstream side of the water passage port.

The device installation structure according to claim 10 is a device installation structure in which drainage from the device is indirectly drained to a drain pipe.
Equipment with a drainage outlet and
The indirect drainage joint according to any one of claims 1 to 8, which is connected to the discharge portion of the device via the upstream connection port.
It is characterized by being provided with a drainage pipe connected to a downstream connection port of an indirect drainage joint.

According to the indirect drainage joint of one embodiment of the present invention, the water flow cylinder portion extends toward the receiver in the drainage port space so that the outlet of the water flow cylinder portion and the socket of the receiving portion are separated from each other. As a result, the flowing direction of the drainage is guided to the receiving port by the flowing water cylinder portion. As a result, it is possible to prevent the drainage from scattering to the outside of the drainage port space. Further, the outlet and the receiving port are separated by a predetermined distance, the opening extends between the upper edge of the receiving port and the outlet, and the opening further opens above the outlet, so that the water flow tube portion. The outlet, along with at least part of the outer surface, is exposed laterally through the opening. This makes it possible to drain the drainage from the drainage port space through the opening when the drainage flows backward. That is, the indirect drainage joint of the present invention can suppress the scattering of drainage from the device and indirectly drain the drainage to the drainage pipe.

According to the indirect drainage joint of a further form of the present invention, in addition to the above effect, the close proximity of the outlet and the socket allows the drainage falling from the outlet to flow into the socket without scattering outside the opening. Can be made to. Further, by separating the outlet and the receiving port, when the drainage flows backward, the drainage overflowing from the receiving port can be discharged from the opening without touching the outlet.

According to the indirect drainage joint of a further form of the present invention, in addition to the effect of the above invention, the opening is opened with a size capable of sufficiently discharging the backflow drainage, so that the drainage overflowing from the socket can be discharged. It is possible to more reliably prevent backflow from the outlet.

According to a further form of the indirect drainage joint of the present invention, in addition to the effect of the above invention, the central axis of the outlet faces the center of the larger diameter socket, so that the drainage flowing down from the outlet is directed to the socket. It is possible to guide more reliably.

According to the indirect drainage joint of a further form of the present invention, in addition to the above invention, the distance between the outlet of the water flow cylinder portion and the receiving port of the receiving portion is less than half the height of the drainage port space. While suppressing the drainage falling from the outlet from scattering outside the opening, the drainage can be reliably flowed into the receiving port.

According to the indirect drainage joint of a further form of the present invention, in addition to the above invention, the opening extends from the socket to the vicinity of the base end of the water flow cylinder portion, so that the drainage overflowing from the socket extends from the outlet. It is possible to more reliably prevent backflow to the upstream.

According to a further form of the indirect drainage joint of the present invention, in addition to the above invention, the drainage port space is reticulated by closing one or more openings by a reticulated body arranged on the outer surface of the peripheral wall portion. Protected by the body. In particular, since the socket is open inside the peripheral wall portion in which the net-like body is arranged on the outer surface, the socket is not exposed to the outside without being protected. That is, the net-like body prevents insects and dust from entering the inside of the receiving portion. As a result, it is possible to prevent the inside of the indirect drainage joint and the drainage pipe from being clogged with insects and dust, and it is possible to reduce the frequency of maintenance of the indirect drainage joint.

According to the indirect drainage joint of a further form of the present invention, the effect of the above invention can be exhibited as an equipment installation structure. That is, in the device installation structure of the present invention, it is possible to suppress the scattering of drainage from the device by the joint for indirect drainage and indirectly drain the water to the drain pipe.

A schematic perspective view of the joint for indirect drainage according to the present invention (a) viewed from above and (b) a schematic perspective view viewed from below. 1 (a) front view, (b) side view, (c) plan view and (d) bottom view of the indirect drainage joint of FIG. (A) AA sectional view and (b) BB sectional view of the indirect drainage joint of FIG. It is an exploded perspective view of the joint for indirect drainage of FIG. The schematic diagram of the equipment installation structure of one Embodiment of this invention. Partial fraction decomposition perspective view of the equipment installation structure of FIG. FIG. 5 is a partially enlarged cross-sectional view of the equipment installation structure of FIG. FIG. 5 is a schematic view showing a form in which drainage from the equipment is drained through an indirect drainage joint in the equipment installation structure of FIG. FIG. 8 is a partially enlarged view of the equipment installation structure of FIG. FIG. 5 is a schematic view showing a form in which the drainage flowing back from the drainage pipe is discharged from the drainage port space of the indirect drainage joint in the equipment installation structure of FIG. The figure which shows the joint for indirect drainage of another embodiment (variant example) which concerns on this invention. The figure which shows the joint for indirect drainage of another embodiment (variant example) which concerns on this invention. The figure which shows the joint for indirect drainage of another embodiment (variant example) which concerns on this invention. The figure which shows the joint for indirect drainage of another embodiment (variant example) which concerns on this invention. The figure which shows the joint for indirect drainage of another embodiment (variant example) which concerns on this invention. The figure which shows the joint for indirect drainage of another embodiment (variant example) which concerns on this invention. The figure which shows the joint for indirect drainage of another embodiment (variant example) which concerns on this invention. The figure which shows the joint for indirect drainage of another embodiment (variant example) which concerns on this invention. The figure which shows the joint for indirect drainage of another embodiment (variant example) which concerns on this invention.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. The shapes of the figures referred to in the following description are conceptual diagrams or schematic views for explaining suitable shape dimensions, and the dimensional ratios and the like do not always match the actual dimensional ratios. That is, the present invention is not limited to the dimensional ratio in the drawings.

The indirect drainage joint 100 of the present embodiment is directly or indirectly connected to the drainage drainage discharge unit 11a of the device 11 which is a latent heat recovery type gas water heater, and the drainage drainage generated from the device 11 is discharged to the drainage pipe 13. It is used for indirect drainage.

First, the configuration of the indirect drainage joint 100 according to the embodiment of the present invention will be described with reference to FIGS. 1 to 4. 1 (a) and 1 (b) are schematic perspective views of an indirect drainage joint 100. 2 (a) to 2 (d) are a front view, a side view, a plan view, and a bottom view of the indirect drainage joint 100. 3A and 3B are a cross-sectional view taken along the line AA and a cross-sectional view taken along the line BB of the indirect drainage joint 100. FIG. 4 is an exploded perspective view of the indirect drainage joint 100.

The indirect drainage joint 100 of the present embodiment is a hollow tubular body extending in the axial direction. As shown in FIG. 1, the indirect drainage joint 100 surrounds the inflow portion 101 into which the drainage from the device 11 flows in, the water flow cylinder portion 102 communicating with the inflow portion 101, and the inflow portion 102. The peripheral wall portion 103 connected to the lower end of the 101, the receiving portion 106 connected to the lower end of the peripheral wall portion 103 to receive the drainage flowing out from the water flow cylinder portion 102, and the receiving portion 106 communicate with each other to drain the drainage pipe 13. It is provided with a drainage unit 107 for discharging to. The inflow portion 101, the flowing water cylinder portion 102, the receiving portion 106, and the drainage portion 107 are arranged concentrically with each other.

As shown in FIG. 2, the inflow portion 101 has a cylindrical shape. An upstream connection port 101a as an inflow port for drainage from the device 11 is formed at the upper end (one end) of the inflow section 101, and the discharge section 11a of the device 11 is directly connected to the upstream connection port 101a. Or indirectly connected. In the present embodiment, the upstream connection port 101a is connected to the discharge portion 11a via the joint 12 (see FIG. 6). The size of the upstream connection port 101a is arbitrarily determined. Further, an annular flange 101b is formed overhanging on the lower end side of the inflow portion 101. A peripheral wall portion 103 extends downward from the lower surface of the flange portion 101b.

The water flow cylinder portion 102 is a straight cylindrical body integrally connected to the lower end side of the inflow portion 101. The flowing water cylinder portion 102 has a reduced diameter from the lower end of the cylindrical inflow portion 101 and extends downward. A circular water passage port 102a is opened at the upper end of the water flow cylinder portion 102, and communicates with the upstream connection port 101a of the inflow portion 101. Further, at the lower end of the water flow cylinder portion 102, an outflow outlet 102b is opened to allow the drainage from the upstream side connection port 101a to flow downward through the water passage port 102a. The outlet 102b has a circular shape having a radius r1. Further, the flowing water cylinder portion 102 is extended to a predetermined length inside the peripheral wall portion 103 so as to be close to the receiving portion 106. In other words, the outflow port 102b at the lower end of the water flow tube portion 102 is separated from the receiving portion 106 by a predetermined distance d.

The peripheral wall portion 103 is formed in a cylindrical shape extending in the axial direction, and connects the lower portion of the inflow portion 101 and the upper portion of the receiving portion 106. More specifically, it extends downward from the lower surface of the flange 101b of the inflow portion 101 and is integrally connected to the edge end surface of the receiving port 106a of the receiving portion 106. A plurality of openings 104 (2 in this embodiment) are bored on the side of the peripheral wall portion 103 in order to open the drainage path to the atmosphere. As a result, the drainage port space 105 is defined inside the peripheral wall portion 103. Then, the flowing water cylinder portion 102 extends in the axial direction inside the drainage port space 105 so as to be inserted into the peripheral wall portion 103. The opening 104 is formed in a rectangular shape on both the front surface and the back surface, and the peripheral wall portion 103 is cut out from the upper end to the lower end thereof. That is, the opening 104 opens from the base end of the flowing water cylinder portion 102 (or the lower end of the inflow portion 101) to the upper end of the receiving portion 106. As a result, the opening 104 opens from the receiving port 106a above the outlet 102b, and at least a part of the outer surface of the water flow cylinder portion 102 is exposed sideways together with the outlet 102b from the opening 104. In the present embodiment, since the ratio of the opening 104 is larger than the ratio of the meat portion of the peripheral wall portion 103, the peripheral wall portion 103 may be interpreted as a connecting portion or a connecting wall. Further, the peripheral wall portion 103 is configured so that a tubular net-like body 110 can be attached to the outer peripheral surface thereof. That is, the reticulated body 110 is covered around the peripheral wall portion 103, and the opening 104 is covered with the reticulated body 110. The net-like body 110 prevents insects and dust from entering the drainage port space 105.

The receiving portion 106 is arranged below the peripheral wall portion 103, and is configured in a cup shape so as to receive the drainage from the outlet 102b. More specifically, the receiving portion 106 has a short tubular shape on the upper side and a tapered diameter on the lower side. A receiving port 106a having a circular opening is provided at the upper end of the receiving portion 106. The inner diameter (radius r2) of the socket 106a is larger than the inner diameter (radius r1) of the outlet 102b. Further, the receiving port 106a and the outlet 102b are separated by a predetermined distance d. Since the peripheral wall portion 103 and the receiving portion 106 are integrally connected to each other, the boundary between the two can be appropriately interpreted. However, in the present embodiment, the lower end edge receiving portion 106 of the opening 104 is used. It was defined as the peripheral edge of the socket 106a.

The drainage portion 107 is integrally connected to the lower end of the tapered portion of the receiving portion 106. The drainage portion 107 communicates with the receiving portion 106, and functions to discharge the drainage flowing from the receiving portion 106 from the indirect drainage joint 100 to the drainage facility. The drainage portion 107 is a cylindrical body having a diameter smaller than that of the receiving portion 106, and has a downstream connection port 107a at the lower end thereof. The indirect drainage joint 100 is connected to the connection portion 13a of the drainage pipe 13 via the downstream connection port 107a.

As shown in FIG. 4, the indirect drainage joint 100 is configured by joining the upper member 100a and the lower member 100b. The inflow portion 101 and the flange 101b are integrally formed on the upper member 100a. A peripheral wall portion 103, a receiving portion 106, and a drainage portion 107 are integrally formed on the lower member 100b. The engaging claw 101c near the lower end of the inflow portion 101 of the upper member 100a engages with the engaging hole 103a formed near the upper end of the peripheral wall portion 103, and the upper end edge of the peripheral wall portion 103 abuts on the lower surface of the flange 101b. , The upper member 100a and the lower member 100b are joined. These members may be joined by fitting, or may be integrally bonded with an adhesive or the like. That is, since the indirect drainage joint 100 can be integrally configured, it has a simple configuration.

In the present embodiment, the indirect drainage joint 100 is manufactured by molding from a synthetic resin. However, the present invention is not limited to this, and the joint for indirect drainage may be formed of another material such as metal or glass. Further, in the present embodiment, the upper member 100a and the lower member 100b as separate bodies are combined, but the entire indirect drainage joint may be integrally molded.

Next, with reference to FIGS. 5 to 7, the configuration of the device installation structure 10 for indirectly draining the drain drainage from the device 11 to the drain pipe 13 via the indirect drainage joint 100 of the present embodiment will be described. .. FIG. 5 is an overall view schematically showing the device installation structure 10. FIG. 6 is an exploded perspective view of the device installation structure 10. FIG. 7 is a partial cross-sectional view of the equipment installation structure 10.

The equipment installation structure 10 includes an equipment 11, an indirect drainage joint 100 connected upstream to the equipment 11, and a drainage pipe 13 connected downstream of the indirect drainage joint 100. As shown in FIG. 5, in the device installation structure 10, the device 11 is fixed to the wall surface of the building. A tubular discharge portion 11a for draining drainage drainage extends from the lower surface of the device 11 (see FIG. 6). A drainage pipe 13 is installed below the device 11. That is, in the device installation structure 10, a drainage route for indirectly draining drainage drainage from upstream to downstream is formed between the discharge portion 11a of the device 11 and the drainage pipe 13.

As shown in FIG. 6, a joint 12 is screwed into the discharge portion 11a, and an indirect drainage joint 100 is connected to the discharge portion 11a of the device 11 via the joint 12. More specifically, as shown in FIG. 7, the connection portion 12a of the joint 12 is fitted into the upstream connection port 101a of the indirect drainage joint 100 so that the inflow portion 101 can inflow the drainage. It is connected to the part 11a. In the present invention, if the diameter of the upstream connection port and the diameter of the equipment discharge portion match, the joint may be omitted and the indirect drainage joint may be directly connected to the equipment. Then, two openings 104 of the indirect drainage joint 100 are opened on the front surface and the back surface, and the drainage path is opened to the external space through the openings 104. At this time, the water flow tube portion 102 extends toward the receiving port 106a in the drainage port space 105, the outlet 102b and the receiving port 106a are separated from each other at a distance d close to each other, and the outlet 102b is exposed from the opening 104. There is. In other words, the opening 104 opens between the outlet 102b and the socket 106a.

Further, the periphery of the peripheral wall portion 103 of the indirect drainage joint 100 is covered with a net-like body 110. The net-like body 110 is made of a stretchable fine-mesh net sheet formed in a cylindrical shape, and is attached to the peripheral wall portion 103 in an extended state. By closing the opening 104 by the reticulated body 110 in this way, the internal space and the external space of the indirect drainage joint 100 are separated or separated from each other by separating the reticulated body 110. That is, the net-like body 110 prevents insects and dust from entering the drainage port space 105.

Then, the indirect drainage joint 100 is connected to the drainage pipe 13 downstream thereof. More specifically, as shown in FIG. 7, the connection portion 13a of the drainage pipe 13 is inserted into the downstream connection port 107a extending below the drainage portion 107 and connected to each other. The drainage pipe 13 is composed of a sub-drainage pipe extending vertically and horizontally below the device 11 and a main drainage pipe extending vertically and vertically from the sub-drainage pipe to the drainage facility. Therefore, in the device installation structure 10, the drain drainage generated from the device 11 is indirectly drained to the drain pipe 13 (drainage facility) through the indirect drainage joint 100.

FIG. 8 shows a form in which the drainage from the device 11 is drained through the indirect drainage joint 100. As shown in FIG. 8, when the amount of drainage drainage from the device 11 and the momentum are strong, the drainage outlet 102b of the water flow cylinder portion 102 becomes a spray of water and swells or scatters outward in the radial direction and flows out. Sometimes. In the indirect drainage joint 100 of the present embodiment, the water flow cylinder portion 102 is close to the receiving portion 106 in the drainage port space 105, and the outflow outlet 102b faces the receiving port 106a. The central axis of the outlet 102b faces the center of the larger diameter receiving port 106a. As a result, the drainage discharged from the outflow port 102b is stably guided to the receiving portion 106 without scattering to the outside of the opening 104. Generally, in order to prevent the drainage falling from the outflow port 102b from being scattered outside the opening 104, the distance d between the outflow port 102b of the water flow tube portion 102 and the receiving port 106a of the receiving portion 106 is the drainage port space. It is preferably about half or less of the height of 105 (the distance between the end of the running water cylinder 102 and the upper end of the receiving portion 106).

FIG. 9 is a partially enlarged view of FIG. As shown in FIG. 9, in the present embodiment, the central axis of the indirect drainage joint 100 is O, the radius (or opening half width) of the outlet 102b is r1, the radius (or opening half width) of the receiving port 106a is r2, and the outlet. The distance between 102b and the socket 106a was defined as d, and the assumed scattering angle of wastewater was defined as α. The scattering angle α indicates an angle in the traveling direction of the drainage that swells or scatters outward from the tip edge of the inner wall surface of the outlet 102b. In other words, in the cross-sectional view, the drainage flows along the extension line L of the inner wall of the straight water flow tube portion 102 and scatters outward from the extension line L so as to swell at a scattering angle α. Then, based on the predicted scattering angle α, a scattering prevention angle α0 (> α) capable of preventing the scattering of wastewater was set. The scattering prevention angle α0 is an angle between the extension line L and the line connecting the inner edge of the lower end of the outlet 102b and the inner edge of the upper end of the receiving port 106a. That is, even if the drainage is scattered up to the scattering prevention angle α0, it is trapped by the inner edge of the receiving port 106a, and the spray is prevented from jumping out. The scattering prevention angle α0 can be determined by the mutual relationship between the outlet radius r1, the receiving radius r2, and the distance d. More specifically, the shatterproof angle α0 is represented by the relational expression [tan (α0) = (r2-r1) / d]. Then, when the outlet radius r1 and the receiving radius r2 are set to predetermined values, the distance d always satisfies the relational expression [d <(r2-r1) / tanα] corresponding to the changing scattering angle α of the wastewater. As described above, it is preferable that the outlet 102b and the receiving port 106a are arranged close to each other.

FIG. 10 shows a mode in which the drainage flowing back from the drainage pipe 13 is discharged from the drainage port space 105 of the indirect drainage joint 100 in the equipment installation structure 10. As shown in FIG. 10, when the drain pipe 13 rises upstream through the discharge portion 107, the receiving portion 106 is filled with drainage and the drainage overflows from the receiving port 106a through the opening 104 to the outside. When the drainage flows backward in this way, the outlet 102b and the receiving port 106a are separated by a distance d, so that the drainage overflowing from the receiving port 106a is discharged from the opening 104 without touching the outlet 102b. When the water pressure of the backflow drainage is weak, the outlet 102b and the receiving port 106a may be separated from each other as much as possible. For example, the distance d may be about 1 mm. However, considering the case where the water pressure of the backflowing wastewater is strong, it is preferable that the distance d is as large as possible while corresponding to the scattering angle α of the wastewater. That is, the larger the scattering prevention angle α0, the more reliable the prevention of the scattering of the drainage becomes, but the distance d becomes smaller, and when the drainage flows backward, the possibility that the drainage touches the outlet 102b increases. .. Therefore, in the present embodiment, it is preferable that the distance d is set so that α0 is 30 degrees to 70 degrees by predicting the scattering range of general wastewater. However, the present invention is not limited to the above numerical range. Further, as the size (opening area) of the opening 104 at the upper edge of the receiving port 106a is larger, the amount of discharged water per hour increases, so that the backflow of wastewater can be suppressed from rising.

In this embodiment, r1 is about 8 mm, r2 is about 14 mm, and d is about 6 mm. And α0 is set at about 45 degrees. That is, the scattering of the wastewater having a scattering angle α up to 45 degrees to the outside is suppressed. However, the present invention is not limited to this. For example, the flowing water cylinder portion 102 may be further extended so that the outlet 102b and the receiving port 106a are brought closer to each other, and the scattering prevention angle α0 may be made larger so as to have a margin for drainage scattering. Alternatively, the flowing water cylinder portion 102 may be shortened to suppress the scattering prevention angle α0 and increase the distance d.

Hereinafter, the action and effect of the indirect drainage joint 100 according to the embodiment of the present invention will be described.

According to the indirect drainage joint 100 of the present embodiment, the water flow tube portion 102 is separated in the drain port space 105 so that the outflow port 102b of the water flow tube portion 102 and the receiving port 106a of the receiving portion 106 are separated in the axial direction. By extending toward 106a, the flowing direction of the drainage is guided to the receiving port 106a by the flowing water cylinder portion 102. That is, since the outflow port 102b and the receiving port 106a are close to each other, the drainage falling from the outflow port 102b can flow into the receiving port 106a without being scattered outside the opening 104. Further, the outlet 102b and the receiving port 106a are separated from each other at a predetermined distance d, and the opening 104 extends between the outlet 102b and the receiving port 106a and above the outlet 104a, and the water flow tube portion 102 is provided together with the outlet 102b from the opening 104. At least part of the outer surface of the is exposed. That is, by separating the outflow port 102b and the receiving port 106a at a distance d, the drainage overflowing from the receiving port 106a when the drainage flows backward can be discharged from the opening 104 without touching the outflow port 102b. That is, the indirect drainage joint 100 of the present embodiment can suppress the scattering of drainage from the device 11 and indirect drainage to the drainage pipe 13.

Further, according to the indirect drainage joint 100 of the present embodiment, the upstream side connection port 101a is connected to the device 11 via the joint 12, and the downstream side connection port 107a is connected to the connection portion 13a of the drainage pipe 13. Therefore, only the opening 104 formed in the peripheral wall portion 103 opens the drainage pipe space 105 to the outside. Further, the opening 104 is closed by mounting the net-like body 110 on the outside of the peripheral wall portion 103. Since the indirect drainage joint 100 and / or the peripheral wall portion 103 of the present embodiment is a tubular body extending in the axial direction, there is an advantage that the net-like body 110 can be easily attached. In particular, since the net-like body 110 is attached from the outside of the peripheral wall portion 103, the net-like body 110 can be easily attached and detached without disassembling the indirect drainage joint 100. Further, the opening 104 is closed by the network 110, so that the drainage port space 105 is protected from the outside by the network 110. In particular, since the receiving port 106a is open inside the peripheral wall portion 103 in which the net-like body 110 is arranged on the outer surface, the receiving port 106a is not exposed to the outside without being protected. That is, the reticulated body 110 prevents insects and dust from entering the receiving portion 106. As a result, it is possible to prevent the inside of the indirect drainage joint 110 and the drainage pipe 13 from being clogged with insects and dust, and it is possible to reduce the frequency of maintenance of the indirect drainage joint 110.

[Modification example]
The present invention is not limited to the above-described embodiment, and various embodiments and modifications can be taken. Hereinafter, a plurality of modifications of the present invention will be described. In each embodiment, the components having the same last two digits have the same or similar characteristics, and some description thereof will be omitted.

(1) The indirect drainage joint 100 of the present embodiment is used for indirect drainage of the drainage drainage of the device 11 which is a latent heat recovery type gas water heater to the drainage pipe 13. However, the present invention is not limited to the use of the present embodiment. For example, equipment such as refrigerators, washing machines, dishwashers, water drinkers, water coolers, equipment such as sterilizers and disinfectants, air conditioning equipment and water supply pumps, etc., where backflow of wastewater poses a hygiene problem. The indirect drainage joint of the present invention may be used for other indirect drainage applications such as drainage pipes such as equipment and water supply tanks or overflow pipes.

(2) The joint for indirect drainage of the present invention is not limited to the shape of the above embodiment. For example, as shown in FIGS. 11 to 19, the shape of the opening provided in the peripheral wall portion may be changed. 11 to 19 are perspective views, front views, and side views from the front and back of the indirect drainage joints 200 to 1000 of the modified example. The plan view and bottom view of the indirect drainage joints 200 to 1000 are the same as those in FIGS. 2 (c) and 2 (d). For example, the indirect drainage joint 200 of FIG. 11 has one opening 204, and the opening 204 extends to about half of the outer circumference of the peripheral wall portion 203. The indirect drainage joint 300 of FIG. 12 includes a peripheral wall portion 303 composed of lattice-shaped meat portions extending vertically and horizontally, and defines a plurality of openings 304. In the indirect drainage joint 400 of FIG. 13, openings 404 having different triangles, rhombuses, and pupil shapes are formed in the peripheral wall portion 403. In the indirect drainage joint 500 of FIG. 14, the opening 504 is larger than the indirect drainage joint 100 of FIG. 1 and is cut out in an arc shape so that the surface area of the peripheral wall portion (connecting portion) 503 is small. Further, as shown in FIGS. 15 to 19, the shape relationship between the peripheral wall portion and the opening portion may be represented as a geometric pattern. As described above, a person skilled in the art can arbitrarily design the number, position, and shape of the openings in the peripheral wall portion.

(3) The indirect drainage joint of the above embodiment is configured in a cylindrical shape extending in the axial direction, but the present invention is not limited thereto. For example, the indirect drainage joint may have a polygonal cross section, an oval shape, or an elliptical shape as long as it can be indirectly or directly connected to the equipment and the drainage pipe.

(4) In the indirect drainage joint of the above embodiment, each portion is configured to be linear in the axial direction, but the present invention is not limited to this. For example, it may be bent or bent depending on the position of the equipment or drain pipe to which the inflow portion and the drain portion are connected. Alternatively, the running water cylinder portion and the peripheral wall may be slightly bent or inclined as long as it is within the scope of the technical idea of the present invention.

The present invention is not limited to the above-described embodiments and modifications, and can be implemented in various embodiments as long as it belongs to the technical scope of the present invention.

10 Equipment installation structure 11 Equipment 11a Discharge part 12 Joint 12a Connection part 13 Drainage pipe 13a Connection part 100 Indirect drainage joint 101 Inflow part 101a Upstream side connection port 102 Water flow tube part 102a Water flow port 102b Outlet 103 Peripheral wall part 103a Engagement hole 104 Opening 105 Drainage port space 106 Receiving part 106a Receiving port 107 Draining part 107a Downstream connection port 110 Reticulated body d Distance between outlet and receiving port

Claims (9)

An indirect drainage joint for indirect drainage of drainage from equipment to a drainage pipe.
An inflow section that is connected to a separate discharge section or joint of the device and has an upstream connection port that allows drainage from the device to flow in.
A water flow cylinder portion that is integrally connected to the inflow portion, communicates with the inflow portion, and discharges drainage from the upstream side connection port downward.
The receiving part that receives the drainage from the flowing water cylinder part and
A drainage unit that is integrally connected to the receiving portion, has a downstream connection port that is directly or indirectly connected to the drainage pipe, and communicates with the receiving portion to discharge wastewater to the drainage pipe. ,
A peripheral wall portion that interpolates the water flow cylinder portion, connects the inflow portion and the receiving portion, provides one or a plurality of openings on the side, and defines a drainage port space inside is provided.
The inflow portion connects the discharge portion or the joint of the device on the upstream side of the lower end of the water flow cylinder portion, the water flow cylinder portion extends toward the receiving portion in the drain port space, and the water flow cylinder portion. The lower end of the portion and the receiving portion are separated from each other, and the opening extends at least between the receiving portion and the lower end of the water flow cylinder portion, and is opened so as to discharge the backflow drainage .
The lower end of the water flow cylinder portion is located above the receiving port of the receiving portion so that the backflow drainage is discharged from the opening without touching the lower end of the water flowing cylinder portion. An indirect drainage joint characterized in that the distance between the lower end and the receiving port is less than half the height of the draining port space. An indirect drainage joint for indirect drainage of drainage from equipment to a drainage pipe.
An inflow section that is connected to a separate discharge section or joint of the device and has an upstream connection port that allows drainage from the device to flow in.
A water flow cylinder portion that is integrally connected to the inflow portion, communicates with the inflow portion, and has an outflow port that allows drainage from the upstream connection port to flow downward.
The receiving part that receives the drainage from the outlet and
A drainage unit that is integrally connected to the receiving portion, has a downstream connection port that is directly or indirectly connected to the drainage pipe, and communicates with the receiving portion to discharge wastewater to the drainage pipe. ,
A peripheral wall portion that interpolates the water flow cylinder portion, connects the inflow portion and the receiving portion, provides one or a plurality of openings on the side, and defines a drainage port space inside is provided.
The inflow portion connects the discharge portion or the joint of the device on the upstream side of the outflow port of the water flow cylinder portion, and the water flow cylinder portion extends toward the receiving portion in the drain port space. The opening is sized to discharge the backflow drainage so that the outlet is exposed from the opening .
The lower end of the water flow cylinder portion is located above the receiving port of the receiving portion so that the backflow drainage is discharged from the opening without touching the lower end of the water flowing cylinder portion. An indirect drainage joint characterized in that the distance between the lower end and the receiving port is less than half the height of the draining port space. The lower end of the flowing water cylinder and the receiving port are arranged close to each other at a distance that the drainage falling from the flowing water cylinder portion flows into the receiving portion of the receiving portion without scattering outside the opening, and the drainage flows backward. 1 or claim 1, wherein the lower end of the water flow cylinder portion and the receiver are separated from each other at a distance at which the drainage overflowing from the receiving port is discharged from the opening without touching the water flowing cylinder portion. The indirect drainage joint according to 2. The indirect drainage joint according to any one of claims 1 to 3, wherein the ratio of the opening portion is larger than the ratio of the meat portion in the peripheral wall portion. Any of claims 1 to 4, wherein the receiving port of the receiving portion and the outlet of the water flow cylinder portion are located concentrically with each other, and the diameter of the receiving portion is larger than the diameter of the outlet. The joint for indirect drainage described in item 1. The indirect drainage joint according to any one of claims 1 to 5 , wherein the opening extends from the receiving port of the receiving portion to the vicinity of the base end of the flowing water cylinder portion. The indirect drainage joint according to any one of claims 1 to 6 , wherein a reticulated body is arranged on the outer surface of the peripheral wall portion, and the reticulated body covers the one or a plurality of openings. .. According to claim 1, a water passage is provided between the inflow portion and the water flow cylinder portion, and the inflow portion connects a discharge portion or a joint of the device on the upstream side of the water passage portion. The joint for indirect drainage according to any one of 7. It is an equipment installation structure that indirectly drains the drainage from the equipment to the drain pipe.
Equipment with a drainage outlet and
The indirect drainage joint according to any one of claims 1 to 8 , which is connected to the discharge portion of the device via an upstream connection port.
A device installation structure including a drainage pipe connected to a downstream connection port of the indirect drainage joint.

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