JP7145716B2 - Flood control device and drainage pipe structure - Google Patents

Description

TECHNICAL FIELD The present invention relates to a flood control device and a drain pipe structure.

As a conventional drain pipe structure, there is a siphon drain system in which a vent valve is screwed into a vent of a drain trap (see, for example, Patent Document 1). The vent valve comprises a check valve. Therefore, according to the siphon drainage system described in Patent Document 1, when negative pressure is generated inside the drain pipe, the check valve opens to allow air to flow into the drain pipe. Thereby, it is possible to prevent excessive negative pressure from being generated in the drain pipe. On the other hand, when a positive pressure is generated inside the drain pipe, the check valve closes to prevent air or waste water from flowing out from the drain pipe.

JP 2015-98702 A

However, even with such a conventional drain pipe structure, when a large amount of waste water flows through the drain pipe, the waste water may overflow through the vent valve.

SUMMARY OF THE INVENTION An object of the present invention is to provide an overflow suppressing tool capable of suppressing overflow from a drain pipe, and a drain pipe structure in which overflow from a drain pipe is suppressed.

A flood suppressor according to the present invention includes a cylindrical peripheral wall connectable to a drain pipe, and a shielding portion that shields the inside of the peripheral wall along the peripheral direction of the peripheral wall. According to the flood suppressing tool of the present invention, it is possible to suppress flooding from the drain pipe.

In the flood control device according to the present invention, the shielding part is an annular shielding part that annularly shields the inside of the peripheral wall, and the opening formed on the inner peripheral side of the shielding part is the Another shielding spaced and shielded on the upper side of the interior of the perimeter wall and affixing the other shielding to the perimeter wall so as to form another opening around the other shielding part. It is preferable to provide a fixing piece for In this case, overflow from the drain pipe can be further suppressed.

In the flood control device according to the present invention, when the flood control device is viewed from the extending direction of the central axis of the flood control device, the inner structure of the peripheral wall is symmetrical about the axis. preferable. In this case, the overflow suppressor can be connected by a simple operation.

In the flood suppressor according to the present invention, it is preferable that the shielding portion has a curved portion directed downward toward the central axis of the flood suppressor. In this case, overflow from the drain pipe can be further suppressed.

In the flood suppressor according to the present invention, it is preferable that the other shielding portion has a curved portion convex upward toward the central axis of the flood suppressor. In this case, overflow from the drain pipe can be further suppressed.

In the flood control device according to the present invention, it is preferable that the shielding portion and the other shielding portion are alternately arranged from the lower side to the upper side, and three or more in total are repeatedly arranged. In this case, overflow from the drain pipe can be further suppressed.

The drain pipe structure according to the present invention includes a drain pipe, a vent valve, a cylindrical peripheral wall disposed between the drain pipe and the vent valve, and the inside of the peripheral wall extending in the circumferential direction of the peripheral wall. another shielding part shielding the opening formed in the shielding part at intervals on the upper side of the inside of the peripheral wall; and the other shielding part shielding along the a fixing piece for fixing the other shielding part to the peripheral wall so as to form another opening around it. According to the drain pipe structure according to the present invention, it becomes a drain pipe structure in which overflow from the drain pipe is suppressed.

ADVANTAGE OF THE INVENTION According to this invention, the overflow suppression tool which can suppress the overflow from a drain pipe, and the drain pipe structure by which the overflow from a drain pipe was suppressed can be provided.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a system diagram schematically showing a siphon drainage system to which the flood control device according to the first embodiment of the present invention can be applied; It is a side view which shows the flood control tool which concerns on 1st Embodiment of this invention. FIG. 3 is a bottom view showing the flood control device of FIG. 2; FIG. 3 is a plan view showing the flood control device of FIG. 2; FIG. 3 is a cross-sectional view taken along the line AA of FIG. 2; FIG. 3 is a cross-sectional view showing a peripheral wall constituting the flood control device of FIG. 2, corresponding to the AA cross section of FIG. 2; 7 is a bottom view of the peripheral wall of FIG. 6; FIG. FIG. 7 is a plan view showing the peripheral wall of FIG. 6; FIG. 11 is a perspective side view showing a flood control device according to a second embodiment of the present invention; FIG. 10 is a perspective sectional view showing the flood control device of FIG. 9, corresponding to the AA section of FIG. 2;

Hereinafter, a flood control device and a drain pipe structure according to an embodiment of the present invention will be described with reference to the drawings. In the following description, "upstream" and "downstream" define the flow of fluid such as drainage and air, and "upper" and "lower" define height. Moreover, the "circumferential direction" refers to the direction around the central axis O1 of the flood control device.

In FIG. 1, reference numeral 100 denotes a siphon drainage system to which the vent valve connector 1A according to the first embodiment of the present invention can be applied. A siphon drainage system 100 illustrated in FIG. It is composed of a vertical tube 190 that In the siphon drainage system 100 of FIG. 1, the drainage pipe is composed of a connection pipe 120, a trap 130, a straight pipe 150, a horizontal pipe 160, and a vertical pipe 170. The plumbing equipment 110 in the example shown in FIG. 1 is a kitchen sink. Also, a disposer 111 is provided at the drain port of the plumbing equipment 110 . The type of plumbing device 110 is not particularly limited as long as it drains water. The plumbing equipment 110 can be a dishwasher, a washbasin, a washing machine, a bathtub and a washing area provided in a bath such as a unit bath, a toilet, and the like.

Specifically, the plumbing equipment 110 is arranged on the floor panel 210 in the residence. In this example, a trap 130 is connected to the plumbing equipment 110 via a connecting pipe 120 . In this example, trap 130 is an S-shaped drain trap. The trap 130 includes a first descending portion 131 in which the flow path descends from the upstream side to the downstream side, a first folded portion 132 in which the flow path turns upward from the upstream side to the downstream side, and a A rising portion 133 rising toward the upstream side from the upstream side, a second turning portion 134 where the flow path turns downward from the upstream side toward the downstream side, and a second falling portion 134 where the flow path descends from the upstream side toward the downstream side. and a portion 135 . In this example, the first descending portion 131, the first folded portion 132, the ascending portion 133, the second folding portion 134 and the second descending portion 135 are integrally formed. Also, in this example, the second descending portion 135 is formed integrally with the straight pipe 150 .

The straight pipe 150 descends from the upstream side toward the downstream side and guides the drainage to the vicinity of the floor slab 220 under the floor panel 210 . The horizontal pipe 160 is connected to the downstream side of the straight pipe 150 and extends horizontally. In addition, the horizontal pipe 160 is made of a pipe thinner than the pipe used for conventional slope drainage, and is installed substantially horizontally (substantially no gradient). The vertical pipe 170 is connected to the downstream side of the horizontal pipe 160, and the flow path descends from the upstream side toward the downstream side. Also, in this example, the vertical pipe 170 passes through the piping hole 230 of the floor slab 220 . Furthermore, in this example, the vertical pipe 170 is connected to the downstream side of the vertical pipe 190 via a junction joint 180 .

The vertical pipe 190 is a tubular body having a larger diameter than the horizontal pipe 160 and the vertical pipe 170, and is provided so as to vertically penetrate the building. The vertical pipe 190 is connected to the drainage channel from the plumbing device 110, but is also connected to the drainage channel from other plumbing devices (not shown), and is connected to the septic tank (not shown) on the downstream side.

The siphon drainage system 100 of FIG. 1 has a drainage pipe structure A and a siphon drainage pipe 200 according to this embodiment, which will be described later. The siphon drain pipe 200 is a pipe provided at least downstream of the storage portion 132 a of the first folded portion 132 of the trap 130 . In the example of FIG. 1 , the siphon drain pipe 200 is composed of a connecting pipe 120 , a trap 130 , a straight pipe 150 , a horizontal pipe 160 and a vertical pipe 170 . In such a siphon drainage system 100, when the system is full, the drainage flows from the horizontal pipe 160 to the vertical pipe 170, and the drainage flows downward, thereby generating a siphon force. The lateral pull pipe 160 is drained by being pulled by the generated siphon force.

As shown in FIG. 1, in this example, in the trap 130, the first fold 132 forms a trap with a reservoir 132a in which waste water can collect. In an S-shaped drainage trap such as the trap 130, the reservoir 132a of the first folded portion 132 is normally filled with a sufficient amount of sealing water. That is, in the storage portion 132a of the first folded portion 132, the space (flow path) between the upstream side and the downstream side is cut off via the water seal. As a result, for example, it is possible to prevent odors, pests, and the like from entering from the downstream side of the trap 130 .

In addition, in the siphon drainage system 100 of FIG. 1, the vent valve 140 is a check valve provided downstream of the reservoir 132a of the trap 130. As shown in FIG. In this example, the vent valve 140 is connected to the upper portion of the second folded portion 134 via a vent valve connector 1A according to this embodiment, which will be described later. As a result, in the siphon drainage system 100 of FIG. 1, when a siphon force (negative pressure) is generated inside the siphon drainage pipe 200, the air is taken into the trap 130 through the ventilation valve 140 by opening the ventilation valve 140. . As a result, even if a large negative pressure is generated inside the siphon drain pipe 200, air can be taken in from the vent valve 140, so that the sealed water in the storage portion 132a of the first folded portion 132 flows downstream (here, rises). 133 side). Therefore, if the vent valve 140 is provided, it is possible to prevent the water seal from breaking (breaking of the seal) (the water seal state can be maintained). On the other hand, when the siphon drain pipe 200 and, by extension, the vent valve 140 do not have a negative pressure, ventilation is not performed through the vent valve 140, so air or waste water flows out from the siphon drain pipe 200 to the outside. can be prevented.

However, even if the vent valve 140 is provided in the siphon drain pipe 200 as in this example, if the vent valve 140 is directly connected to the upper part of the trap 130, when a large amount of waste water flows, the waste water It could get into the vent valve 140 . In particular, when the drainage is vigorous, the drainage may overflow from the vent valve 140 .

Therefore, in the siphon drainage system 100 of FIG. 1, the siphon drainage pipe 200 and the vent valve 140 are connected via the flood control device 1A according to the present embodiment.

FIG. 2 is a side view of the flood control device 1A according to this embodiment. Moreover, FIG. 3 is a bottom view of the flood control tool 1A. Furthermore, FIG. 4 is a top view of the flood control tool 1A. As shown in FIGS. 2 to 4, the flood control device 1A according to this embodiment is a cylindrical connecting device. In the figure, the symbol O1 is the central axis of the flood control device 1A.

Furthermore, FIG. 5 is sectional drawing of 1 A of flood suppression tools. As shown in FIG. 5, the flood control device 1A has a cylindrical peripheral wall 10 connectable to a drain pipe. A flood control device 1A according to this embodiment includes a tubular peripheral wall 10 having a lower end 11 connectable to a trap 130 and an upper end 12 connectable to a vent valve 140 . The peripheral wall 10 is preferably cylindrical as in this embodiment. However, as long as the peripheral wall 10 is a hollow wall, the cross-sectional shape is not limited to a circle (annular shape), and various cross-sectional shapes such as a polygon can be used.

As shown in FIG. 5 , in the flood suppressor 1A according to this embodiment, the lower end portion 11 has an “internal thread” formed as part of the inner peripheral surface of the peripheral wall 10 . Also, in this embodiment, the upper end 12 has an "external thread" formed as part of the outer peripheral surface of the peripheral wall 10 . Specifically, the peripheral wall 10 includes a large diameter portion 10a and a small diameter portion 10b connected to the large diameter portion 10a. In this embodiment, the lower end 11 is shaped as part of the large diameter portion 10 a of the peripheral wall 10 . Also, in this embodiment, the upper end portion 12 is formed as part of the small diameter portion 10b of the peripheral wall 10 . In this embodiment, the central axis O10 of the peripheral wall 10 is arranged coaxially with the central axis O1 of the vent valve connector 1A.

Furthermore, the flood suppressor 1A includes a shielding portion 20 that shields the inside of the peripheral wall 10 along the circumferential direction of the peripheral wall 10 . The shield 20 is located inside the peripheral wall 10 on the side of the lower end 11 . In the flood control tool 1A according to this embodiment, the shielding part 20 shields the inside of the peripheral wall 10 in an annular shape.

In the flood control device 1A according to the present embodiment, the annular shielding part (hereinafter also simply referred to as "annular shielding part") 20 prevents drainage from the trap 130 when the flood control device 1A is connected to the trap 130. It functions as a shielding portion that prevents the introduction of the inside of the peripheral wall 10 . The opening A2 formed in the shielding part 20 functions as a passage for discharging air from the trap 130 when the flood suppressing device 1A is connected to the trap 130 .

In the flood control tool 1A according to this embodiment, the shielding part 20 is configured as a member separate from the peripheral wall 10 . In this embodiment, the shielding portion 20 is fixed to the inner peripheral surface of the large diameter portion 10 a of the peripheral wall 10 . Further, in the present embodiment, the central axis O20 of the shielding part 20 is also arranged coaxially with the central axis O1 of the flood control device 1A. In this embodiment, as shown in FIG. 3, when viewed from the extending direction of the central axis O1 of the peripheral wall 10, that is, when viewed in the axial direction, the outer edge 20e1 of the shielding portion 20 has a circular shape. In this embodiment, the shape of the outer edge 20e1 of the shielding part 20 is a circle with a radius R2a centered on the central axis O1 of the flood control device 1A. The opening A2 is a circle with a radius R2b centered on the central axis O1 of the flood control device 1A.

In the flood suppressor 1A according to the present embodiment, as shown in FIG. 5, the shielding portion 20 has a curved shape portion directed downward toward the central axis O1 of the flood suppressor 1A.

As shown in FIG. 5, in the overflow suppressor 1A according to the present embodiment, a plane including the central axis O1 of the flood suppressor 1A is taken as a cross section, and when viewed from the direction perpendicular to the cross section, that is, when viewed in the axial direction cross section The shielding portion 20 has an annular portion 20a, a cylindrical curved portion 20b connected to the opening edge of the annular portion 20a, and a cylindrical portion 20c connected to the opening edge of the curved portion 20b.

In the flood suppressing device 1A according to the present embodiment, as shown in FIG. 20b and a lower (peripheral) shielding surface 20f1c of the cylindrical portion 20c. In this embodiment, as shown in FIG. 5, the cross-sectional shape of the lower side shielding surface 20f1a of the annular portion 20a in the axial cross-sectional view is the is a straight line extending in a direction (radial direction) orthogonal to the extending direction of the central axis O1 of the . Further, in this embodiment, as shown in FIG. 5, the cross-sectional shape of the lower shielding surface 20f1b of the curved portion 20b is a curve with a radius R20a centered on the center point P20 when viewed in a cross-sectional view perpendicular to the axis. Further, in the present embodiment, as shown in FIG. 5, the cross-sectional shape of the lower shielding surface 20f1c of the cylindrical portion 20c is a straight line extending in the direction of air flow in a cross-sectional view in the axial direction. In this embodiment, as shown in FIG. 5, the center point P20 is the straight line (radial direction) of the lower shielding surface 20f1a of the annular portion 20a and the lower shielding surface 20f1c of the cylindrical portion 20c in the axial cross-sectional view. It is the position of the center point of the circle when the circle is drawn so that the straight line of (axial direction) is tangent to each other.

In addition, in the overflow suppressing device 1A according to the present embodiment, as shown in FIG. 5, in a cross-sectional view in the direction perpendicular to the axis, the upper shielding surface 20f2 of the shielding portion 20 and the upper shielding surface 20f2a of the annular portion 20a are curved. It is formed by an upper shielding surface 20f2b of the shaped portion 20b and an upper (inner peripheral) shielding surface 20f2c of the cylindrical portion 20c. In this embodiment, as shown in FIG. 5, the cross-sectional shape of the upper shielding surface 20f2a of the annular portion 20a is a straight line extending in a direction orthogonal to the air flow direction when viewed in a cross-sectional view perpendicular to the axis. Further, in the present embodiment, as shown in FIG. 5, the cross-sectional shape of the upper shielding surface 20f2b of the curved portion 20b is a curve with a radius R20b centered on the center point P20 in a cross-sectional view perpendicular to the axis. Further, in the present embodiment, as shown in FIG. 5, the cross-sectional shape of the upper side shielding surface 20f2c of the cylindrical portion 20c is a straight line extending in the air flow direction when viewed in a cross-sectional view perpendicular to the axis. It should be noted that the shielding portion 20 can be composed only of the curved portion 20b.

In particular, in the flood control tool 1A according to this embodiment, the shielding part 20 has the annular convex part 20d. In the present embodiment, the annular projection 20d is annularly erected from the annular portion 20a around the central axis O1 of the flood control device 1A. In this embodiment, the shielding part 20 can be fixed to the peripheral wall 10 by, for example, press-fitting it into the annular recess 10n of the peripheral wall 10 . Alternatively, the shield 20 can be sandwiched between the perimeter wall 10 and the trap 130 without being fixed to the lower edge of the perimeter wall 10 .

In addition, as shown in FIG. 5, in the flood suppressor 1A according to the present embodiment, the shielding portion 20 is an annular shielding portion that annularly shields the inside of the peripheral wall 10 . In the present embodiment, an intermediate shielding portion (another shielding portion) 30 that shields the opening A2 formed on the inner peripheral side of the shielding portion 20 at intervals on the upper side inside the peripheral wall 10; It has The intermediate shielding portion 30 is located above the shielding portion 20 inside the peripheral wall 10 . 7 is a bottom view of the peripheral wall 10. FIG. 8 is a plan view of the peripheral wall 10. FIG. As shown in FIGS. 7 and 8, the flood control device 1A according to the present embodiment has a fixing structure in which the intermediate shielding portion 30 is fixed to the peripheral wall 11 so as to form another opening A3 around the intermediate shielding portion 30. a piece 31;

In the flood suppressor 1A according to this embodiment, the intermediate shielding portion 30 is formed integrally with the peripheral wall 10 via a plurality of fixing pieces 31 . As shown in FIGS. 7 and 8, in this embodiment, the peripheral wall 10 has four fixed pieces 31 arranged around the central axis O1 of the flood control device 1A at intervals as the fixed pieces 31. ing. Thus, four openings A3 are formed between the four fixed pieces 31. As shown in FIG. In this embodiment, the fixing piece 31 is formed as part of the inner peripheral surface of the small diameter portion 10b of the peripheral wall 10 . Further, in the present embodiment, the central axis O30 of the intermediate shielding portion 30 is also arranged coaxially with the central axis O1 of the flood control device 1A. In this embodiment, as shown in FIGS. 7 and 8, the outer edge 30e1 of the intermediate shielding portion 30 has a circular shape when viewed in the axial direction. As shown in FIG. 8, in this embodiment, the shape of the outer edge 30e1 of the intermediate shielding part 30 is a circle with a radius R3a centered on the central axis O1 of the flood control device 1A. Further, as shown in FIG. 7, the shape of the inner edge 30e2 of the intermediate shielding portion 30 is a circle with a radius R3b centered on the central axis O1 of the flood control device 1A.

In the flood suppressor 1A according to the present embodiment, as shown in FIG. 5, the intermediate shielding portion 30 has a curved portion convex upward toward the central axis O1 of the flood suppressor 1A.

FIG. 6 is a cross-sectional view showing the peripheral wall 10 corresponding to the AA cross section of FIG. In the flood control device 1A according to the present embodiment, as shown in FIG. 6, the intermediate shielding part 30 has a plane including the central axis O1 of the flood control device 1A as a cross section, and when viewed from the direction perpendicular to the cross section, that is, , is shaped like a dome when viewed in axial cross-section. In this embodiment, the intermediate shielding portion 30 has a cylindrical portion 30a extending from the lower portion to the upper portion, and a curved portion 30b connected to the upper end surface of the cylindrical portion 30a.

In the flood control device 1A according to the present embodiment, as shown in FIG. 6, in a cross-sectional view in the axial direction, the lower side shielding surface 30f1 of the intermediate shielding portion 30 covers the lower side (inner peripheral side) of the cylindrical body portion 30a. It is formed of a surface 30f1a and a lower shielding surface 30f1b of the curved portion 30b. In the present embodiment, the tubular portion 30a extends from the upper end surface 31f of the fixed piece 31 in the extending direction of the central axis O1 of the flood control device 1A by a length L30. In the present embodiment, as shown in FIG. 6, the cross-sectional shape of the lower side shielding surface 30f1a of the cylindrical body portion 30a is a straight line extending in the air flow direction in a cross-sectional view in the axial direction. Further, in the present embodiment, as shown in FIG. 6, the cross-sectional shape of the lower side shielding surface 30f1b of the curved portion 30b is a semicircular curve with a radius R30a centered on the center point P30 in a cross-sectional view perpendicular to the axis. is. In the present embodiment, as shown in FIG. 6, the center point P30 extends from the upper end surface 31f of the fixing piece 31 in the extending direction of the central axis O1 of the flood suppressor 1A by a length L30 in a cross-sectional view perpendicular to the axis. It is a distant position and is located on the central axis O1 of the flood control device 1A. That is, in the present embodiment, as shown in FIG. 6, the center point P30 is a position between the cylindrical body portion 30a and the curved portion 30b on the central axis O1 of the flood control device 1A in a cross-sectional view perpendicular to the axis. It is in.

In addition, in the flood control device 1A according to the present embodiment, as shown in FIG. 6, in a cross-sectional view in the direction perpendicular to the axis, the upper shielding surface 30f2 of the intermediate shielding portion 30 is located on the upper side (outer peripheral side) of the cylindrical body portion 30a. It is formed of a shielding surface 30f2a and an upper shielding surface 30f2b of the curved portion 30b. In this embodiment, as shown in FIG. 6, the cross-sectional shape of the upper side shielding surface 30f2a of the cylindrical body portion 30a is a straight line extending in the air flow direction in a cross-sectional view in the axial direction. Further, in the present embodiment, as shown in FIG. 6, the cross-sectional shape of the upper shielding surface 30f2b of the curved portion 30b is a semicircular curve with a radius R30b centered on the center point P30 when viewed in a cross-sectional view perpendicular to the axis. is. As will be described later, the intermediate shielding portion 30 can be composed only of the curved portion 30b.

Furthermore, in the flood control device 1A according to the present embodiment, the shielding portions 20 and the intermediate shielding portions 30 can be alternately arranged from the lower side to the upper side, and a total of three or more of them can be repeatedly arranged.

In the flood control device 1A according to the present embodiment, as shown in FIG. 5, a total of three shielding portions 20 and intermediate shielding portions 30 are repeatedly arranged alternately from the lower side to the upper side. In this embodiment, the inside of the peripheral wall 10 is provided with a further shielding part 40 that shields the inside of the peripheral wall 10 in an annular shape. The shield 40 is located inside the peripheral wall 10 on the side of the upper end 12 . The shielding part 40 shields the inside of the peripheral wall 10 in an annular shape on the side of the upper end part 12 .

In the flood control tool 1A according to this embodiment, the shielding part 40 is configured as a member separate from the peripheral wall 10 . In this embodiment, the shielding portion 40 is fixed to the inner peripheral surface of the small diameter portion 10b of the peripheral wall 10 . Further, in the present embodiment, the central axis O40 of the shielding portion 40 is also arranged coaxially with the central axis O1 of the vent valve connector 1A. In this embodiment, as shown in FIG. 4, when viewed from the extending direction of the central axis O1 of the peripheral wall 10, that is, when viewed in the axial direction, the outer edge 40e1 of the shielding portion 40 has a circular shape. In this embodiment, the shape of the outer edge 40e1 of the shielding part 40 is a circle with a radius R4a centered on the central axis O1 of the flood control device 1A. The opening A4 is a circle with a radius R4b centered on the central axis O1 of the flood control device 1A.

In the overflow suppressor 1A according to the present embodiment, as shown in FIG. 5, the shielding portion 40 has a curved shape portion directed downward toward the central axis O1 of the flood suppressor 1A.

In the flood control device 1A according to the present embodiment, as shown in FIG. 5, the shielding portion 40 includes an annular portion 40a and a tubular curved portion connected to the opening edge of the annular portion 40a in a cross-sectional view perpendicular to the axis. 40b and a tubular portion 40c connected to the opening edge of the curved portion 40b.

In the overflow suppressing device 1A according to the present embodiment, as shown in FIG. 40b and a lower (peripheral) shielding surface 40f1c of the tubular portion 40c. In this embodiment, as shown in FIG. 5, the cross-sectional shape of the lower side shielding surface 40f1a of the annular portion 40a is a straight line extending in a direction orthogonal to the air flow direction in a cross-sectional view in the axial direction. In this embodiment, as shown in FIG. 5, the cross-sectional shape of the lower shielding surface 40f1b of the curved portion 40b is a curve with a radius R40a centered on the center point P40 when viewed in a cross-sectional view perpendicular to the axis. Further, in the present embodiment, as shown in FIG. 5, the cross-sectional shape of the lower shielding surface 40f1c of the tubular portion 40c is a straight line extending in the direction of air flow when viewed in cross-section in the axial direction. In the present embodiment, as shown in FIG. 5, the center point P40 is the straight line (radial direction) of the lower shielding surface 40f1a of the annular portion 40a and the lower shielding surface 40f1c of the cylindrical portion 40c in the axial cross-sectional view. It is the position of the center point of the circle when the circle is drawn so that the straight line of (axial direction) is tangent to each other.

In addition, in the overflow suppressing device 1A according to this embodiment, as shown in FIG. It is formed by an upper shielding surface 40f2b of the shaped portion 40b and an upper (inner peripheral) shielding surface 40f2c of the cylindrical portion 40c. In the present embodiment, as shown in FIG. 5, the cross-sectional shape of the upper shielding surface 40fa2 of the annular portion 40a is a straight line extending in a direction orthogonal to the air flow direction in a cross-sectional view perpendicular to the axis. In this embodiment, as shown in FIG. 5, the cross-sectional shape of the upper shielding surface 40f2b of the curved portion 40b is a curved line with a radius R40b centered on the center point P40 when viewed in a cross-sectional view perpendicular to the axis. Further, in the present embodiment, as shown in FIG. 5, the cross-sectional shape of the upper shielding surface 40f2c of the cylindrical portion 40c is a straight line extending in the air flow direction in a cross-sectional view perpendicular to the axis. It should be noted that the shielding portion 40 can be composed only of the curved portion 40b.

In addition, in the flood control device 1A according to the present embodiment, the shielding portion 40 has an annular convex portion 40d. In the present embodiment, the annular projection 40d is annularly erected from the annular portion 40a around the central axis O1 of the flood control device 1A. Moreover, in this embodiment, the shielding part 40 can be fixed to the upper side end of the peripheral wall 10 . Alternatively, shield 40 can be sandwiched between peripheral wall 10 and vent valve 140 without being fixed to the upper edge of peripheral wall 10 . In addition, in this embodiment, the shielding part 40 is the same member as the shielding part 20 . In this case, parts can be shared. However, the shielding part 40 can be a member different from the shielding part 20 .

According to the overflow suppressing device 1A according to the present embodiment, since the shielding part 20 shields the inside of the peripheral wall 10 along the peripheral direction of the peripheral wall 10, a large amount of waste water flows into the drain pipe. Even when the drainage enters the flood control device 1A, it is possible to suppress the drainage from flowing into the upper part. Therefore, according to the overflow suppressor 1A according to the present embodiment, it is possible to suppress the overflow of the trap 130 . Further, according to the overflow suppressing device 1A according to the present embodiment, the opening A2 formed on the inner peripheral side of the shielding part 20 allows the air inside the siphon drain pipe 200 to escape, so that the inside of the siphon drain pipe 200 It is possible to suppress the breakage that may occur in In particular, in the case of an annular shielding portion in which the shielding portion 20 annularly shields the inside of the peripheral wall 10 as in the present embodiment, the shielding portion 20 functions like a chimney to allow air to flow in and out. can make it easier to Moreover, when the shielding part 20 is an annular shielding part, for example, when the shielding part 20 is configured separately as in the present embodiment, the shielding part 20 can be easily formed.

Furthermore, according to the flood control device 1A according to the present embodiment, the intermediate shielding part 30 is spaced from the shielding part 20 on the upper part side inside the peripheral wall 11 to shield the opening A20 of the shielding part 20. Therefore, even when a large amount of water flows into the siphon drain pipe 200 and enters the flood control device 1A through the opening A2 formed in the shielding part 20, can be suppressed. In this case, flooding from the trap 130 can be further suppressed. Further, according to the flood control device 1A according to the present embodiment, the opening A3 formed around the intermediate shielding part 30 allows the air inside the siphon drain pipe 200 to escape, so that the inside of the siphon drain pipe 200 Possible breakage of the seal can be suppressed. Note that, as in this embodiment, the opening diameter (radius R2b×2) of the opening A2 of the shielding portion 20 is preferably smaller than the outer edge diameter (radius R3a×2) of the outer edge 30e1 of the intermediate shielding portion 30 . In this case, it is difficult for the waste water from the trap 130 to flow upward, but the air in the trap 130 can easily flow out.

As is clear from FIGS. 3 to 5, 7, and 8, the flood suppressor 1A according to the present embodiment has the peripheral wall 10 when viewed from the extending direction of the central axis O1. is a symmetrical structure with respect to the central axis O1. Specifically, the flood suppressor 1A has a structure in which the shielding portion 20, the intermediate shielding portion 30, the shielding portion 40, and the openings A2, A3, and A4 are symmetrical about the central axis O1. In this case, structural alignment of the trap 130 and the vent valve 140 is facilitated, so that the flood control device can be connected with a simple operation. In addition, according to the flood control device of the present invention, when the flood control device 1A is viewed from the extending direction of the central axis O1, the internal structure of the peripheral wall 10 can be made asymmetric with respect to the central axis O1. . However, it is preferable that they are symmetrical in consideration of the mounting direction when mounting the flood control device.

In addition, in the overflow suppressor 1A according to the present embodiment, the shielding portion 20 has a curved portion 20b directed downward toward the central axis O1 of the flood suppressor 1A. In this case, the water overflowing from the trap 130 can be efficiently returned to the trap 130 along the lower shielding surface 20f1 of the curved portion 20b of the shielding portion 20, so that the trap 130 is further prevented from overflowing. can do.

In addition, in the flood suppressor 1A according to the present embodiment, the intermediate shielding portion 30 has a curved shape portion 30b convex upward toward the downstream side. In this case, even when the water overflowing from the trap 130 enters through the opening A2 formed in the shielding portion 20, the water overflowing from the trap 130 is directed to the trap 130 by the curved portion 30b of the intermediate shielding portion 30. Since it can be efficiently returned along the lower side shielding surface 30f1, overflow from the trap 130 can be further suppressed. In particular, in this embodiment, the upper shielding surface 30f2 of the intermediate shielding portion 30 has the upper shielding surface 30f2a of the cylindrical body portion 30a. In this case, it is possible to obtain the effect of preventing splashing water, which may be caused by vibration of the disposer 111 or the like, from entering the inside of the vent valve 140 . In this embodiment, as shown in FIG. 6, the intermediate shielding portion 30 is shaped like a dome when viewed in cross-section in the direction perpendicular to the axis. It can also be shaped into a rectangular shape.

In addition, in the flood suppressor 1A, the shielding portions 20 and the intermediate shielding portions 30 are alternately arranged from the lower side to the upper side, and three or more in total are repeatedly arranged. In this embodiment, the flood control device 1A has a total of three repeatedly arranged shielding portions 20, intermediate shielding portions 30, and shielding portions 40 alternately from the lower side to the upper side. In such a case, flooding from the trap 130 can be further suppressed by increasing the number of shielding portions.

Moreover, in the flood control device 1A according to the present embodiment, the shielding portions 20 and 40 are configured as members different from the peripheral wall 10 . In this embodiment, the peripheral wall 10 can be made of resin, metal, or an elastic material, for example. Moreover, in this embodiment, the shielding parts 20 and 40 can also be formed of resin, metal, or an elastic material, for example. In this embodiment, the shielding portions 20 and 40 are made of an elastic material such as rubber. In this case, the shields 20 and 40 can function as packings (sealing members).

By the way, the siphon drainage system 100 of FIG. A shielding portion 20 that shields along the circumferential direction, and another shielding portion 30 that shields the opening A2 formed in the shielding portion 20 at intervals on the upper side inside the peripheral wall 10. and a fixing piece 31 for fixing the other shielding portion 30 to the peripheral wall 10 so as to form another opening A3 around the other shielding portion 30 . The siphon drainage system 100 of FIG. 1 has a drain configuration A as shown. As shown in area A, the drain pipe structure A according to this embodiment includes a trap 130 , a vent valve 140 , and a flood suppressor 1A arranged between the trap 130 and the vent valve 140 . The flood control device 1A includes a peripheral wall 10 arranged between a trap 130 and a vent valve 140, as shown in FIG. In addition, the flood suppressor 1A includes a shielding portion 20 that shields the inside of the peripheral wall 10 along the circumferential direction of the peripheral wall 10, and an opening A2 formed on the inner peripheral side of the shielding portion 20. 11, and the intermediate shielding part 30 is fixed to the peripheral wall 10 so as to form another opening A3 around the intermediate shielding part 30. A fixed piece 31 is provided. Therefore, according to the drain pipe structure A according to the present embodiment, it becomes a drain pipe structure in which overflow from the trap 130 is suppressed. In addition, in the drain pipe structure 1A according to the present embodiment, by arranging the overflow suppressor 1A between the trap 130 and the vent valve 140, the above configuration is made an attachment-type drain pipe structure. According to the drainage pipe structure, if the cylindrical peripheral wall 10, the shielding part 20, the other shielding part 30 and the fixed piece 31 can be arranged between the trap 130 and the vent valve 140, these can be prevented from overflowing. Assembling as the suppressor 1A is not essential.

FIG. 9 is a perspective side view schematically showing a flood control device 1B according to a second embodiment of the invention. FIG. 10 is a perspective cross-sectional view schematically showing the flood control device 1B, corresponding to the AA cross section of FIG. Hereinafter, in the overflow suppressor 1B according to the present embodiment, the same reference numerals are used for the same configurations as the flood suppressor 1A according to the first embodiment, and the description thereof will be omitted.

A flood control device 1B according to this embodiment is formed by integrally forming a peripheral wall 10, a shielding portion 20, an intermediate shielding portion 30, and a shielding portion 40. As shown in FIG. In this case, the flood control device 1B can be integrally formed of the same material such as resin.

The foregoing merely describes some embodiments of the present invention, and various modifications are possible in accordance with the scope of the claims. For example, if the shielding part 20 shields the inside of the peripheral wall 10 along the circumferential direction of the peripheral wall 10, the inside of the peripheral wall 10 is intermittently along the peripheral direction of the peripheral wall 10. It may be shielded. That is, the shielding portion 20 is not limited to an annular shielding portion. Moreover, it is desirable that the shielding portion 20 be located at a position on the lower side inside the peripheral wall 10 and at least on the upstream side where the flow during drainage can be introduced. A specific example of such a shielding portion 20 is a semicircular shielding portion when viewed in the axial direction of the peripheral wall 10 . In this case, the blocking portion 20 blocks the upstream side into which the flow during drainage can be introduced, while the gap formed between the blocking portion 20 and the inner peripheral surface of the peripheral wall 10 blocks the flow of air on the downstream side. is allowed. Such a non-annular shielding portion 20 is effective when the inner structure of the peripheral wall 10 is asymmetrical.

In each of the above-described embodiments, the flood control devices 1A and 1B are configured separately from the vent valve 140 for versatility with existing vent valves, but can be formed integrally with the vent valve 140 concerned. Further, the flood control device according to the present invention is preferably arranged between the vent valve and the drain pipe, but can be arranged between the vent and the drain pipe. Furthermore, in each of the above-described embodiments, the flood suppressing devices 1A and 1B are arranged above the trap 130, but if they are in a position where the air in the siphon drain pipe 200 can be discharged, the connecting pipe 120, the trap 130, It can be arranged at any position of the straight pipe 150 , the horizontal pipe 160 , or the vertical pipe 170 . Furthermore, various configurations employed in each of the embodiments described above can be used in combination with each other. Also, the various configurations employed in the respective embodiments described above can be replaced with each other as appropriate.

1A: Flooding suppressor (first embodiment), 1B: Flooding suppressor (second embodiment), 10: Peripheral wall, 11: Lower end, 12: Upper end, 20: Shielding part, 20a: Annular part, 20b: Curved portion 20c: Cylindrical portion 30: Intermediate shielding portion (another shielding portion) 30a: Cylindrical portion 30b: Curved portion 31: Fixed piece 40: Shielding portion 40a: Annular portion , 40b: curved shape part, 40c: cylindrical part, A: drainage pipe structure, A2: opening of shielding part, A3: opening around intermediate shielding part (other opening), A4: opening of shielding part Part 100: Siphon drainage system 110: Plumbing equipment 120: Connecting pipe 130: Trap 131: First descending part 132: First folding part 132a: Storage part 133: Ascending part 134: Third 2 folded part, 135: second descending part, 140: ventilation valve, 150: straight pipe, 160: horizontal pipe, 170: vertical pipe, 180: confluence joint, 190: vertical pipe, 200: siphon drainage pipe

Claims (6)

a cylindrical peripheral wall connectable to a drain pipe;
a shielding portion that shields the inside of the peripheral wall along the circumferential direction of the peripheral wall;
with
The shielding part is an annular shielding part that shields the inside of the peripheral wall in an annular shape, and the opening formed on the inner peripheral side of the shielding part is spaced from the upper part of the inside of the peripheral wall. Other shielding parts that are placed and shielded,
a fixing piece for fixing the other shielding part to the peripheral wall so as to form another opening around the other shielding part;
a flood control device. 2. The flood suppressor according to claim 1 , wherein the inner structure of the peripheral wall is symmetrical about the axis when the flood suppressor is viewed from the extending direction of the central axis of the flood suppressor. The flood suppressor according to claim 1 or 2 , wherein the shielding portion has a curved portion directed downward toward the central axis of the flood suppressor. The flood suppressor according to any one of claims 1 to 3, wherein the other shielding portion has a curved portion convex upward toward the center axis of the flood suppressor. The flooding according to any one of claims 1 to 4 , wherein the shielding part and the other shielding part are alternately arranged from the lower side to the upper side, and a total of three or more are repeatedly arranged. suppressor. a drain pipe;
a vent valve;
a cylindrical peripheral wall disposed between the drain pipe and the vent valve;
a shielding portion that shields the inside of the peripheral wall along the circumferential direction of the peripheral wall;
another shielding part shielding the opening formed in the shielding part with a space therebetween on the upper side inside the peripheral wall;
a fixing piece for fixing the other shielding part to the peripheral wall so as to form another opening around the other shielding part;
A drainage pipe structure.

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