JP6861574B2 - Indirect drainage fitting - Google Patents

Description

The present invention relates to an indirect drainage joint that prevents drainage leaking from a drainage pipe on the downstream side from flowing to the upstream side and having an adverse effect.

Conventionally, it has been adopted as a drainage route for draining drainage of equipment such as a water heater, and prevents the drainage from flowing back from the drainage pipe on the downstream side and adversely affecting the equipment. The indirect drainage structure is already well known (see, for example, Patent Documents 1 and 2).

Japanese Unexamined Patent Publication No. 2011-162947 Japanese Unexamined Patent Publication No. 2016-21166

However, in the indirect drainage device disclosed in Patent Document 1 and the indirect drainage joint disclosed in Patent Document 2, the drainage and gas (harmful gas) on the downstream side reach the upstream side. In some cases, such wastewater or gas may come into contact with a part in the device, causing the part to corrode.

Therefore, an object of the present invention is to provide an indirect drainage joint that prevents the drainage or gas generated in the drainage pipe on the downstream side from flowing to the upstream side and causing an adverse effect.

The present invention is an indirect drainage joint for indirect drainage of drainage flowing from the upstream toward a drainage pipe portion arranged on the downstream side, and a main body portion having a drainage space inside through which the drainage passes. The main body includes a receiving portion that receives drainage flowing from the upstream into the drainage space, a discharge portion that communicates the drainage space and the drainage pipe portion, and the drainage space. A water passage unit that communicates with the outside of the main body portion is provided, and a fluid backflow prevention means is arranged at a predetermined position in the drainage space of the main body portion. A sealing portion having a shape that allows drainage to flow inside is provided, and the sealing portion has at least a passing state in which drainage flowing from the upstream passes toward the downstream and a fluid in the drain pipe portion from the main body portion. Is also an indirect drainage joint characterized in that the state is changed to a fluid backflow blocking state that prevents the outflow to the upstream side.

In such a configuration, the fluid (drainage or gas) does not leak to the upstream side of the main body of the indirect drainage joint because the fluid backflow prevention means is in the fluid backflow prevention state, so that it is harmful even on the downstream side. It is possible to prevent an adverse effect on the upstream side even if a large amount of fluid is generated. Of course, when the fluid backflow preventing means is in the passing state, it is possible to flow the drainage toward the drainage pipe portion. Even if the drainage flows back from the drainage pipe on the downstream side, the backflow water can flow out from the drainage space to the outside of the main body through the water passage, so that the indirect drainage structure is appropriately used. Can be built.

In the above configuration, a configuration is proposed in which the drainage flowing from the upstream to the main body is drainage discharged from a device arranged on the upstream side of the main body.

In such a configuration, it is possible to prevent the fluid on the downstream side from reaching the device that discharges the drain drainage. Of course, when the fluid backflow prevention means is in a passing state, drainage drainage can flow toward the drainage pipe portion. In addition, even if the drainage flows back from the drainage pipe portion on the downstream side, the backflow water flows out to the outside of the main body portion through the water passage portion, so that there is no risk of damage to the equipment.

Further, apart from the above configuration, a configuration is proposed in which the drainage flowing from the upstream to the main body is discharged from a rain gutter arranged on the upstream side of the main body.

In such a configuration, it is possible to prevent the fluid on the downstream side from reaching the rain gutter. Of course, when the fluid backflow preventing means is in a passing state, rainwater can flow toward the drainage pipe portion. In addition, even if the drainage flows back from the drainage pipe portion on the downstream side, the backflow water flows out to the outside of the main body portion through the water passage portion, so that there is no possibility of backflow to the rain gutter.

Further, the fluid backflow prevention means is detachable from the main body portion, and the fluid backflow prevention means is taken in and out of the main body portion between the predetermined position in the drainage space and the outside. A configuration is proposed in which a removable opening is provided to enable it.

With such a configuration, the fluid backflow preventing means can be replaced or repaired, so that the maintenance work of the fluid backflow preventing means becomes easy.

Further, it is desirable that the detachable opening is provided with a door portion for opening and closing the detachable opening.

With such a configuration, it is possible to prevent dust, insects, and the like from entering the drainage space by closing the detachable opening at the door under normal use conditions. On the other hand, when performing maintenance work, the attachment / detachment opening can be opened to allow the fluid backflow prevention means to be taken in and out.

Further, it is desirable that the outer peripheral surface of the door portion is provided with ribs protruding outward.

With such a configuration, the strength of the door portion itself can be improved. Further, when opening and closing the door portion, the operator can perform the work by manually picking the rib as a knob, which has an advantage of improving workability.

Further, the door portion is slidably attached along the outer peripheral surface of the main body portion, and a configuration is proposed in which the detachable opening is opened or closed by sliding the door portion. ..

With such a configuration, the opening / closing structure for opening or closing the detachable opening can be simplified and made compact.

Further, it is proposed that the door portion is provided with a water passage portion that communicates the drainage space with the outside of the main body portion in a state where the door portion closes the attachment / detachment opening.

With such a configuration, if the drainage flows backward, the drainage can also flow out to the outside from the water passage portion provided in the door portion.

Then, it is proposed that the main body portion includes a fixing means for fixing the fluid backflow preventing means at the predetermined position while the fluid backflow preventing means is attached to the main body portion.

With such a configuration, even if a backflow of wastewater should occur, it is possible to prevent a problem that the fluid backflow preventing means is unintentionally detached from a predetermined position.

Further, the total opening area of the water passage portion provided in the main body portion is the smallest of the total opening areas along the cross section orthogonal to the flow direction in the passing state in the sealing portion. A larger configuration is proposed.

With such a configuration, even if a backflow of drainage occurs, a sufficient opening area of the water passage portion is secured with respect to the flow rate of the backflowed drainage, so that the backflowed drainage stays in the drainage space. It is unlikely that problems such as drainage will occur.

The joint for indirect drainage of the present invention can positively prevent the fluid on the downstream side from flowing to the upstream side and having an adverse effect while ensuring the indirect drainage structure by providing the fluid backflow prevention means. it can.

It is explanatory drawing which shows the use state of the joint for indirect drainage. It is an external perspective view of the joint for indirect drainage. It is a vertical cross-sectional view of the joint for indirect drainage in the use state. The main body is shown, (a) is an external perspective view, (b) is a front view, and (c) is a sectional view taken along line AA of (b). The cap is shown, (a) is an external perspective view, (b) is a plan view, and (c) is a sectional view taken along line BB of (b). A door portion is shown, (a) is an external perspective view, (b) is a front view, and (c) is a sectional view taken along line CC of (b). The trap is shown, (a) is an external perspective view, (b) is a plan view, (c) is a side view, and (d) is a DD line sectional view of (b). It is explanatory drawing which shows the operation outline of a valve body, (a) shows a fluid backflow prevention state, and (b) shows a passing state.

An embodiment in which the indirect drainage joint of the present invention is used in a path for draining drainage from a water heater will be described in detail. The present invention is not limited to the examples shown below, and the design can be changed as appropriate.

As shown in FIG. 1, the indirect drainage joint 1 is arranged and used between the water heater 70 arranged on the upstream side and the drainage main 75 arranged on the downstream side. Specifically, the drain pipe portion 71 for discharging the drain drainage of the water heater 70 is connected to the indirect drainage joint 1, and the drain pipe portion 73 connected to the drainage main 75 and communicates with the sill 74 is connected. Has been done. The indirect drainage joint 1 has a function of indirectly draining the drainage drainage flowing from the upstream toward the drainage main 75.

Hereinafter, the configuration of the indirect drainage joint 1 will be described.
As shown in FIGS. 2 and 3, the indirect drainage joint 1 includes a cylindrical main body 10 whose axial direction is substantially up and down.

Further, as shown in FIGS. 3 and 4, a drainage space 15 through which drainage passes is formed in the main body 10. Further, an upper opening 11 communicating with the drainage space 15 is formed at the upper end of the main body 10, and a lower opening 12 communicating with the drainage space 15 is formed at the lower end. ..

A lid-shaped cap 30 as shown in FIG. 5 is attached to the upper opening 11. Then, as shown in FIG. 3, the downstream end of the drain pipe portion 71 of the water heater 70 is inserted into the cylindrical drain pipe guide cylinder portion 31 formed in the center of the cap 30, and the drain pipe portion 71 is further inserted. The lower ends of the drain pipe guide cylinders 31 are fixed to each other in a state of being abutted against the stopper portions 32 formed at the lower ends of the drain pipe guide cylinders 31. By the way, a plurality (4 places) of guide convex portions 33 protruding toward the central axis of the drain pipe guide cylinder portion 31 are provided on the inner peripheral surface of the drain pipe guide cylinder portion 31. With such a configuration, the frictional resistance when the drain pipe portion 71 is inserted and removed from the drain pipe guide cylinder portion 31 is suppressed, and the workability is improved. The upper opening 11 of the main body 10 constitutes a receiving portion according to the present invention.

On the other hand, as shown in FIG. 3, the upstream end of the drainage pipe 73 is connected to the lower opening 12 of the main body 10. The lower opening 12 of the main body 10 constitutes the discharge portion according to the present invention.

Further, as shown in FIG. 4, a plurality of elongated hole-shaped water passage portions 16 for communicating the drainage space 15 and the outside are provided on the side peripheral surface of the main body portion 10. Further, on the side peripheral surface of the main body portion 10, one detachable opening portion 13 having an opening area larger than that of the water passage portion 16 is provided.

Further, the detachable opening 13 of the main body 10 is provided with a door portion 40 for opening or closing the detachable opening 13. More specifically, as shown in FIG. 6, the door portion 40 is composed of a curved member having a cross section substantially C-shaped corresponding to the shape of the main body portion 10, and has dimensions that allow the detachable opening 13 to be closed. Have. Further, on the outer peripheral surface of the door portion 40, ribs 41 projecting outward are formed along the left-right direction. Further, the door portion 40 is also provided with a plurality of elongated hole-shaped water passage portions (water passage portions) 46 for the door portion in a penetrating manner, similarly to the main body portion 10.

The door portion 40 is slidably attached to the detachable opening 13 in the left-right direction, and is normally covered with the detachable opening 13 as shown in FIG. 2, and the main body is maintained during maintenance. The attachment / detachment opening 13 as shown in FIG. 4A is opened by sliding along the outer peripheral surface of the portion 10.

Further, as shown in FIG. 3, a trap 50, which is a fluid backflow prevention means, can be detachably attached to and detached from the lower end portion of the main body portion 10 in the drainage space 15 and below the water passage portion 16. It is installed.

More specifically, the trap 50 includes a cylindrical trap body 51, as shown in FIG. Further, at the upper end portion of the trap main body 51, a plurality of recesses 52, 52 arranged at equal intervals and a plurality of notch-shaped guide portions 53 arranged between the plurality of recesses 52, 52 are formed. ing.

Further, a bridge-shaped knob portion 55 bridged in the radial direction is provided above the trap main body portion 51. Further, an O-ring 57 made of a rubber material is mounted on the outer peripheral surface of the trap main body 51.

Further, a valve body 60 made of a rubber material is attached to the lower end of the trap main body 51. The valve body 60 has an elastically deformable valve structure in which drainage can flow through the inside and the diameter is reduced toward the lower side, and the discharge port 62 (see FIG. 8) formed at the lower end thereof is provided. In a normal state, a pair of flat plate-shaped rims 61, 61 facing each other are in close contact with each other to be in a closed state. The valve body 60 constitutes a sealing portion according to the present invention.

On the other hand, at a predetermined position in the drainage space 15 to which the trap 50 is fixed, a trap fixing convex portion 18 projecting inward from the inner peripheral surface of the main body portion 10 is provided as shown in FIGS. .. The trap fixing convex portion 18 constitutes the fixing means according to the present invention.

In such a configuration, when the trap 50 is attached to the drainage space 15 of the main body 10, the trap 50 is placed after aligning the position of the trap fixing convex portion 18 of the main body 10 and the concave portion 52 of the trap 50. Push the trap 50 into the lower part of the drainage space 15, and then move the trap 50 in one direction while pinching the knob portion 55 until the trap fixing convex portion 18 of the main body portion 10 abuts on the end of the notch-shaped guide portion 53 of the trap 50. Rotate to. As a result, the trap 50 is watertightly fixed to the main body 10 with the O-ring 57 interposed between the trap 50 and the main body 10. The trap 50 can be removed from the main body 10 according to the reverse procedure described so far.

Next, the operation mode of the indirect drainage joint 1 will be described.
When the indirect drainage joint 1 is fixed to the main body 10 as described above and the drain drainage does not flow normally, as shown in FIG. 8A, the mouth edge 61 of the valve body 60 in the trap 50 , 61 are in close contact with each other, and the discharge port 62 is closed to enter the fluid backflow prevention state α. In such a state, as shown in FIG. 3, the fluid (drainage or gas) in the drainage main 75 is prevented from flowing out to the upstream side of the trap 50. Therefore, the gas does not leak into the water heater 70 and the equipment is not damaged.

On the other hand, when the drain drainage flows out from the water heater 70 and a predetermined amount of drain drainage is accumulated in the valve body 60, the valve body 60 is elastically deformed by the weight of the drain drainage and as shown in FIG. 8 (b). The rims 61 and 61 are separated from each other, and the discharge port 62 is in an open passing state β. In such a state, the drain drainage in the valve body 60 is appropriately discharged to the downstream side. When the drain drainage accumulated in the valve body 60 is properly discharged, the valve body 60 returns to its original shape and is in the fluid backflow prevention state α again.

Even if the drainage from the drainage pipe portion 73 flows back to the indirect drainage joint 1, the backflow water can flow out from the drainage space 15 through the water passage portions 16 and 24 to the outside of the main body portion 10. , The indirect drainage structure is properly constructed.

Here, the total opening area of the water passage portions 16 and 46 in the main body portion 10 is the smallest of the total opening areas along the cross section orthogonal to the flow direction of the drain drainage in the passing state β (this embodiment). Is set to be larger than the opening area of the discharge port 62). With such a configuration, even if the drainage in the drainage main 75 flows backward, a sufficient opening area of the water passage portions 16 and 46 is secured for the flow rate, so that the drainage space is provided. The drainage that has flowed back into the 15 does not stay. By the way, the total opening area of the water passages 16 and 46 may be smaller than the opening area of the lower opening 12, or the total opening area of the water passages 16 and 46 and the lower side. It may be made equal to the opening area of the opening 12.

Since the trap 50 can be attached to and detached from the main body 10, the trap 50 can be taken in and out through the attachment / detachment opening 13 for replacement or repair.

Further, when the detachable opening 13 is closed by the door portion 40, it is possible to prevent dust, insects and the like from entering the drainage space 15 from the detachable opening 13. Since the rib 41 is formed on the door portion 40, the strength of the door portion 40 is sufficiently ensured. Further, the rib 41 can be used as a knob.

Further, since the door portion 40 has an opening / closing structure that slides along the outer peripheral surface of the main body portion 10, it has a simple and compact structure.

Further, since the main body 10 is provided with a fixed structure for fixing the trap 50, the trap 50 does not unintentionally come off from the main body 10 even if the drainage flows backward.

The dimensions and shape of each part can be freely selected as appropriate.

Further, the trap 50 may be installed in the drainage space 15 at a position above the water passage portion 16. Even in such a configuration, it is possible to prevent the fluid in the drainage main 75 from leaking into the water heater 70.

Further, the trap 50 may have a fixed structure integrated with the main body 10 instead of the trap 50 having the detachable fixed structure described above. When such a configuration is adopted, a configuration in which the attachment / detachment opening 13 is not provided may be adopted.

Further, the trap 50 may have another structure instead of the valve body 60 made of the elastic material described above. For example, a structure using a float (floating member) may be used.

Further, in the above-described embodiment, the drain pipe portion 71 and the main body portion 10 are fixed by using the cap 30, but for example, the drain pipe portion 71 is simply the main body portion 10 without using the cap 30. It may be inserted in the drainage space 15 of the above, or may be arranged above the drainage space 15. Of course, a structure other than these configurations may be used.

Further, the opening / closing structure of the door portion 40 may be an opening / closing structure using a hinge structure instead of the above-described configuration. Further, the mounting structure of the door portion 40 may be a detachable structure. Further, the door portion 40 may not be formed with the water passage portion 46 for the door portion. The present invention also includes a structure that does not include the door portion 40.

Further, the indirect drainage joint 1 may be used as a path for discharging rainwater flowing through the rain gutter, instead of the above-mentioned usage pattern. For example, the lower end of the rain gutter arranged on the upstream side is connected to the upper opening 11 of the indirect drainage joint 1, and the drain pipe communicating with the rainwater main pipe arranged on the downstream side is connected to the lower opening 12. A configuration in which the parts are connected is proposed. The indirect drainage joint 1 having such a configuration has a function of indirectly draining rainwater flowing from the upstream toward the rainwater main.

1 Indirect drainage joint 10 Main body 11 Upper opening (accepting part)
12 Lower opening (discharge part)
13 Detachable opening 15 Drainage space 16 Water passage 18 Trap fixing convex part (fixing means)
40 Door 41 Rib 46 Door water passage 50 Trap (fluid backflow prevention means)
60 Valve body (sealing part)
70 Water heater (equipment)
75 Drainage pipe α Fluid backflow prevention state β Passing state

Claims (7)

It is an indirect drainage joint for indirect drainage of drainage flowing from the upstream toward the drainage pipe located on the downstream side.
It is equipped with a main body that has a drainage space inside for drainage to pass through.
The main body
A receiving part that receives the drainage flowing from the upstream into the drainage space,
A drainage section that communicates the drainage space and the drainage pipe section,
A water passage unit that communicates the drainage space with the outside of the main body unit,
With
Further, a fluid backflow prevention means is arranged at a predetermined position in the drainage space of the main body portion.
The fluid backflow prevention means includes a sealing portion having a shape that allows drainage to flow inside.
The sealing part is at least
The passing state where the drainage flowing from the upstream passes toward the downstream,
The state is changed to a fluid backflow prevention state in which the fluid in the drainage pipe portion is prevented from flowing out to the upstream side of the main body portion .
The fluid backflow prevention means is removable from the main body.
The main body is provided with a removable opening that allows the fluid backflow prevention means to be taken in and out between the predetermined position in the drainage space and the outside. Drainage fitting. The indirect drainage joint according to claim 1 , wherein a door portion for opening and closing the detachable opening is attached to the detachable opening. The indirect drainage joint according to claim 2 , wherein ribs protruding outward are provided on the outer peripheral surface of the door portion. The door portion is slidably attached along the outer peripheral surface of the main body portion.
The indirect drainage joint according to claim 2 or 3 , wherein the detachable opening is opened or closed by sliding the door portion. The door portion, the door portion is said desorbing opening the drainage space in a state of closing the said body portion of the outside <br/> claims 2 to have water passing portion is provided for communicating The joint for indirect drainage according to any one of claims 4. It is an indirect drainage joint for indirect drainage of drainage flowing from the upstream toward the drainage pipe located on the downstream side.
It is equipped with a main body that has a drainage space inside for drainage to pass through.
The main body
A receiving part that receives the drainage flowing from the upstream into the drainage space,
A drainage section that communicates the drainage space and the drainage pipe section,
A water passage unit that communicates the drainage space with the outside of the main body unit,
With
Further, a fluid backflow prevention means is arranged at a predetermined position in the drainage space of the main body portion.
The fluid backflow prevention means includes a sealing portion having a shape that allows drainage to flow inside.
The sealing part is at least
The passing state where the drainage flowing from the upstream passes toward the downstream,
A fluid backflow blocking state that prevents the fluid in the drainage pipe from flowing out to the upstream side of the main body.
Converted to
The main body
With the fluid backflow prevention means attached to the main body, the fixing means for fixing the fluid backflow prevention means at the predetermined position is provided.
Indirect drainage fittings that are characterized by this. It is an indirect drainage joint for indirect drainage of drainage flowing from the upstream toward the drainage pipe located on the downstream side.
It is equipped with a main body that has a drainage space inside for drainage to pass through.
The main body
A receiving part that receives the drainage flowing from the upstream into the drainage space,
A drainage section that communicates the drainage space and the drainage pipe section,
A water passage unit that communicates the drainage space with the outside of the main body unit,
With
Further, a fluid backflow prevention means is arranged at a predetermined position in the drainage space of the main body portion.
The fluid backflow prevention means includes a sealing portion having a shape that allows drainage to flow inside.
The sealing part is at least
The passing state where the drainage flowing from the upstream passes toward the downstream,
A fluid backflow blocking state that prevents the fluid in the drainage pipe from flowing out to the upstream side of the main body.
Converted to
The total opening area of the water passage portion provided in the main body portion is larger than the opening area of the discharge port along the cross section orthogonal to the flow direction in the passing state in the sealing portion.
Indirect drainage fittings that are characterized by this.

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