JP2020060016A - Overflow suppressing implement and drain pipe structure - Google Patents

Abstract

To provide the overflow suppressing implement that can suppress overflow from a drain pipe, and the drain pipe structure that can suppress the overflow from the drain pipe.SOLUTION: An overflow suppressing implement 1A placed between the drain pipe and a vent valve comprises: a cylindrical peripheral wall 10 that has a lower end part 11 connectable to the drain pipe and an upper end part 12 connectable to the vent valve; a shielding part 20 that shields the inside of the peripheral wall 10 in an annular shape along a circumferential direction of the peripheral wall 10 on a side of the lower end part 11; an intermediate shielding part 30 that shields an opening A2 formed on an inner peripheral side of the shielding part 20 at intervals on an upper side part inside the peripheral wall 10; and a shielding part 40 that shields the inside of the peripheral wall 10 in the annular shape on the upper end part 12 side.SELECTED DRAWING: Figure 5

Description

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

  As a conventional drainage pipe structure, there is a siphon drainage system in which a ventilation valve is screwed into a ventilation hole of a drainage trap (for example, refer to Patent Document 1). The ventilation valve includes a check valve. Therefore, according to the siphon drainage system described in Patent Document 1, when a 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 the negative pressure from being excessively generated in the drain pipe. On the other hand, when a positive pressure is generated inside the drain pipe, the check valve is closed to prevent air, drainage, or the like from flowing out of the drain pipe to the outside.

JP, 2015-98702, A

  However, even with such a conventional drain pipe structure, when a large amount of drainage flows into the drain pipe, the drainage may overflow through the ventilation valve.

  An object of the present invention is to provide an overflow control device that can suppress overflow from a drain pipe, and a drain pipe structure in which overflow from the drain pipe is suppressed.

  The overflow suppressor according to the present invention includes a tubular peripheral wall that can be connected to a drain pipe, and a shield that shields the inside of the peripheral wall along the circumferential direction of the peripheral wall. According to the overflow suppressor according to the present invention, it is possible to suppress overflow from the drain pipe.

  In the overflow control tool according to the present invention, 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 The other shielding portion is fixed to the peripheral wall so as to form another shielding portion that shields at a space on the upper side inside the peripheral wall and another opening around the other shielding portion. And a fixing piece for In this case, overflow water from the drain pipe can be further suppressed.

  The overflow suppressor according to the present invention may have a structure in which the internal structure of the peripheral wall is symmetrical about the axis when the overflow suppressor is viewed from the extending direction of the central axis of the overflow suppressor. preferable. In this case, the overflow control device can be connected by simple work.

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

  In the overflow control device according to the present invention, it is preferable that the other shielding portion has a curved portion that is convex toward an upper side toward the central axis of the overflow control device. In this case, overflow water from the drain pipe can be further suppressed.

  In the flooding suppressor according to the present invention, it is preferable that the shields and the other shields are alternately arranged from the lower side to the upper side in a total of three or more. In this case, overflow water from the drain pipe can be further suppressed.

  According to the present invention, the drainage pipe structure includes a drainage pipe, a ventilation valve, a cylindrical peripheral wall arranged between the drainage pipe and the ventilation valve, and an inside of the peripheral wall in a circumferential direction of the peripheral wall. A shield part that shields along the shield part and an opening part formed in the shield part are shielded with a space on the upper side inside the peripheral wall, and another shield part and the other shield part. A fixing piece for fixing the other shielding part to the peripheral wall so as to form another opening around it. According to the drainage pipe structure of the present invention, a drainage pipe structure in which overflow from the drainage pipe is suppressed is obtained.

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

FIG. 1 is a system diagram schematically showing a siphon drainage system to which a flood control device according to a first embodiment of the present invention can be applied. It is a side view which shows the overflow suppression tool which concerns on 1st Embodiment of this invention. It is a bottom view which shows the flooding suppressor of FIG. It is a top view which shows the flooding suppression tool of FIG. FIG. 3 is a sectional view taken along line AA of FIG. 2. It is sectional drawing which shows the surrounding wall which comprises the flooding suppression tool of FIG. 2 by the AA cross section of FIG. It is a bottom view which shows the peripheral wall of FIG. It is a top view which shows the peripheral wall of FIG. It is a perspective side view showing a flood control tool concerning a 2nd embodiment of the present invention. FIG. 10 is a perspective cross-sectional view showing the flooding suppressor of FIG. 9 taken along the line AA of FIG. 2.

  Hereinafter, an overflow control tool 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 part" define the height. Further, the “circumferential direction” refers to a direction around the central axis O1 of the overflow control device.

  In FIG. 1, reference numeral 100 is a siphon drainage system to which the ventilation valve connector 1A according to the first embodiment of the present invention can be applied. The siphon drainage system 100 illustrated in FIG. 1 is connected via a water supply device 110, a connection pipe 120, a trap 130, a ventilation valve 140, a straight pipe 150, a horizontal pull pipe 160, a vertical pipe 170, and a confluence joint 180. It is constituted by a vertical tube 190. In the siphon drainage system 100 of FIG. 1, the drainage pipe includes a connection pipe 120, a trap 130, a straight pipe 150, a horizontal pipe 160, and a vertical pipe 170. The water supply equipment 110 in the example shown in FIG. 1 is a kitchen sink. Further, a disposer 111 is provided at the drain port of the water supply equipment 110. The type of the water supply equipment 110 is not particularly limited as long as it drains water. The water supply equipment 110 can be a dishwasher, a washbasin, a washing machine, a bathtub provided in a bath such as a unit bath, a washing place, a toilet, and the like.

  Specifically, in the house, the water supply equipment 110 is arranged on the floor panel 210. In this example, a trap 130 is connected to the water supply equipment 110 via a connection pipe 120. In this example, the trap 130 is an S-shaped drain trap. The trap 130 includes a first descending part 131 in which the flow path descends from the upstream side to the downstream side, a first folding part 132 in which the flow path folds upward from the upstream side to the downstream side, and a flow path in the downstream side. From the upstream side toward the upstream side, the second folding portion 134 where the flow path folds downward from the upstream side toward the downstream side, and the second descending direction where the flow path descends from the upstream side to the downstream side. And a portion 135. In this example, the first descending portion 131, the first folding portion 132, the rising portion 133, the second folding portion 134, and the second descending portion 135 are integrally formed. Further, in this example, the second descending portion 135 is formed integrally with the straight pipe 150.

  The straight pipe 150 has a flow path that descends from the upstream side to the downstream side, and guides the drainage under the floor panel 210 to the vicinity of the floor slab 220. The horizontal drawing pipe 160 is connected to the downstream side of the straight pipe 150 and extends in the horizontal direction. Further, the horizontal draw pipe 160 is a pipe thinner than the pipe used for conventional gradient drainage, and is installed substantially horizontally (substantially non-gradient). The vertical pipe 170 is connected to the downstream side of the horizontal draw pipe 160, and the flow path descends from the upstream side to the downstream side. Further, in this example, the vertical pipe 170 penetrates the piping hole 230 of the floor slab 220. Further, in this example, the vertical pipe 170 is connected to the downstream side of the vertical pipe 190 via a merging joint 180.

  The vertical pipe 190 is a pipe 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 standpipe 190 is connected to a drainage flow path from the water supply equipment 110, but is also connected to a drainage flow path from another water supply equipment (not shown) and is connected to a 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 the present embodiment, which will be described later. The siphon drainage pipe 200 is a pipe provided at least on the downstream side of the storage portion 132a of the first folded portion 132 of the trap 130. In the example of FIG. 1, the siphon drainage pipe 200 is composed of a connection pipe 120, a trap 130, a straight pipe 150, a horizontal draw pipe 160, and a vertical pipe 170. In such a siphon drainage system 100, when the drainage is full, the drainage flows out from the horizontal pipe 160 to the vertical pipe 170, and the drainage is caused to flow downward to generate a siphoning force. The horizontal 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 turnback portion 132 forms a trap including a storage portion 132a in which waste water can be stored. In an S-shaped drain trap such as the trap 130, normally, the sealing water is sufficiently stored in the storage portion 132a of the first turnback portion 132. That is, in the storage portion 132a of the first turnback portion 132, the space (flow path) between the upstream side and the downstream side is blocked by the sealing water. Thereby, for example, invasion of odors, harmful insects, and the like from the downstream side of the trap 130 can be prevented.

  Further, in the siphon drainage system 100 of FIG. 1, the ventilation valve 140 is a check valve and is provided on the downstream side of the storage portion 132a of the trap 130. In this example, the ventilation valve 140 is connected to the upper portion of the second folded portion 134 via a ventilation valve connector 1A according to the present embodiment, which will be described later. Accordingly, in the siphon drainage system 100 of FIG. 1, when a siphoning force (negative pressure) is generated inside the siphon drainage pipe 200, the ventilation valve 140 opens, so that air is taken into the trap 130 through the ventilation valve 140. . Thereby, even if a large negative pressure is generated inside the siphon drain pipe 200, air can be taken in from the ventilation valve 140, so that the sealing water in the storage portion 132a of the first turnback portion 132 is on the downstream side (here, rises). Part 133 side). Therefore, if the vent valve 140 is provided, it is possible to prevent the water from running out (breaking) (the water-sealed state can be maintained). On the other hand, when the siphon drain pipe 200, and by extension, the ventilation valve 140 is not in a negative pressure, air is not passed through the ventilation valve 140, so that air, drainage, or the like flows out from the inside of the siphon drain pipe 200. Can be prevented.

  However, even if the ventilation valve 140 is provided in the siphon drain pipe 200 as in this example, when the ventilation valve 140 is directly connected to the upper portion of the trap 130, when a large amount of drainage flows, the drainage is generated. The vent valve 140 sometimes entered. In particular, when the drainage is strong, the drainage may overflow from the ventilation valve 140.

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

  FIG. 2 is a side view of the flood suppression device 1A according to the present embodiment. Moreover, FIG. 3 is a bottom view of the overflow suppression device 1A. Further, FIG. 4 is a plan view of the overflow control tool 1A. As shown in FIGS. 2 to 4, the overflow suppressing device 1A according to the present embodiment is a cylindrical connecting device. In the figure, the symbol O1 is the central axis of the overflow control device 1A.

  Further, FIG. 5 is a cross-sectional view of the overflow suppression device 1A. As shown in FIG. 5, the flood control device 1A includes a cylindrical peripheral wall 10 that can be connected to a drain pipe. The flood control device 1A according to the present embodiment includes a tubular peripheral wall 10 having a lower end portion 11 connectable to the trap 130 and an upper end portion 12 connectable to the ventilation valve 140. The peripheral wall 10 is preferably cylindrical as in the present embodiment. However, as long as the peripheral wall 10 is a hollow wall, the cross-sectional shape is not limited to a circular shape (annular shape), and may have various cross-sectional shapes such as a polygonal shape.

  As shown in FIG. 5, in the flood control device 1A according to the present embodiment, the lower end 11 has a “female screw” formed as a part of the inner peripheral surface of the peripheral wall 10. Further, in the present embodiment, the upper end portion 12 has an “male screw” formed as a 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 the present embodiment, the lower end 11 is formed as a part of the large diameter portion 10 a of the peripheral wall 10. Further, in the present embodiment, the upper end portion 12 is formed as a part of the small diameter portion 10b of the peripheral wall 10. In the present embodiment, the central axis O10 of the peripheral wall 10 is arranged coaxially with the central axis O1 of the ventilation valve connector 1A.

  Further, the overflow control device 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 portion 20 is located inside the peripheral wall 10 on the side of the lower end portion 11. In the flood control device 1A according to the present embodiment, the shielding portion 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 has drainage from the trap 130 when the flood control device 1A is connected to the trap 130. Function as a shield that prevents the gas from being introduced into the interior of the peripheral wall 10. The opening A2 formed in the shielding portion 20 functions as a passage for discharging the air from the trap 130 when the overflow suppressing device 1A is connected to the trap 130.

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

  In the overflow control tool 1A according to the present embodiment, as shown in FIG. 5, the shielding section 20 has a curved shape section that extends downward toward the central axis O1 of the overflow control tool 1A.

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

  In the flood control device 1A according to the present embodiment, as shown in FIG. 5, the lower shielding surface 20f1 of the shielding portion 20 has a lower shielding surface 20f1a of the annular portion 20a and a curved portion when viewed in a cross section in the direction perpendicular to the axis. It is formed by a lower side shield surface 20f1b of 20b and a lower side (outer peripheral side) shield surface 20f1c of the tubular portion 20c. In the present embodiment, as shown in FIG. 5, the cross-sectional shape of the lower side shield surface 20f1a of the annular portion 20a is the cross-sectional shape in the direction perpendicular to the axis, and the cross-sectional shape of the flow direction of air (drainage) (in this embodiment, the flood control device 1A). Is a straight line extending in a direction (radial direction) orthogonal to the extending direction of the central axis O1. Further, in the present embodiment, as shown in FIG. 5, the cross-sectional shape of the lower shielding surface 20f1b of the curved shape portion 20b is a curve having a radius R20a with the center point P20 as the center in a cross-sectional view in the direction 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 tubular portion 20c is a straight line extending in the air flow direction when viewed in the direction perpendicular to the axis. In the present embodiment, as shown in FIG. 5, the center point P20 is a (radial) straight line of the lower shield surface 20f1a of the annular portion 20a and the lower shield surface 20f1c of the tubular portion 20c in the axial cross-sectional view. Is the position of the center point of the circle when the circle is drawn so that the (axial direction) straight line is tangent to each other.

  Further, in the flood control device 1A according to the present embodiment, as shown in FIG. 5, the upper shielding surface 20f2 of the shielding portion 20 is curved with the upper shielding surface 20f2a of the annular portion 20a in a cross-sectional view in the direction perpendicular to the axis. The upper side shield surface 20f2b of the shaped portion 20b and the upper side (inner peripheral side) shield surface 20f2c of the tubular portion 20c are formed. In the present 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 the direction orthogonal to the air flow direction when viewed in the direction 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 shape portion 20b is a curve having a radius R20b with the center point P20 as the center in a cross-sectional view in the direction perpendicular to the axis. In addition, in the present embodiment, as shown in FIG. 5, the cross-sectional shape of the upper shielding surface 20f2c of the tubular portion 20c is a straight line extending in the air flow direction when viewed in the direction perpendicular to the axis. In addition, the shielding part 20 can be configured only by the curved shape part 20b.

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

  In addition, as shown in FIG. 5, in the flood control device 1A according to the present embodiment, the shielding portion 20 is an annular shielding portion that shields the inside of the peripheral wall 10 in an annular shape. In the present embodiment, an intermediate shield portion (another shield portion) 30 that shields the opening A2 formed on the inner peripheral side of the shield portion 20 at an upper portion inside the peripheral wall 10 with a gap, Is equipped with. The intermediate shield portion 30 is located inside the peripheral wall 10 and above the shield portion 20. Further, FIG. 7 is a bottom view of the peripheral wall 10. Further, FIG. 8 is a plan view of the peripheral wall 10. As shown in FIGS. 7 and 8, the flood control device 1A according to the present embodiment fixes the intermediate shield 30 to the peripheral wall 11 so as to form another opening A3 around the intermediate shield 30. The piece 31 is provided.

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

  In the overflow control tool 1A according to the present embodiment, as shown in FIG. 5, the intermediate shielding portion 30 has a curved portion that is convex toward the upper side toward the central axis O1 of the overflow control tool 1A.

  FIG. 6 is a cross-sectional view showing the peripheral wall 10 corresponding to the AA cross section of FIG. 2. In the flood control device 1A according to the present embodiment, the intermediate shielding portion 30 has a plane including the central axis O1 of the flood control device 1A as a cross section, as viewed from the perpendicular direction of the cross section, as shown in FIG. , It is formed in a dome shape in a sectional view in the direction perpendicular to the axis. In the present embodiment, the intermediate shield portion 30 has a tubular body portion 30a extending from the lower side to the upper side, and a curved portion 30b connected to the upper end surface of the tubular body portion 30a.

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

  Further, in the flood control device 1A according to the present embodiment, as shown in FIG. 6, the upper shielding surface 30f2 of the intermediate shielding portion 30 is an upper side (outer peripheral side) of the tubular body portion 30a in a cross-sectional view taken in the direction perpendicular to the axis. The shield surface 30f2a and the upper shield surface 30f2b of the curved portion 30b are formed. In the present embodiment, as shown in FIG. 6, the cross-sectional shape of the upper shielding surface 30f2a of the tubular body portion 30a is a straight line extending in the air flow direction when viewed in the direction perpendicular to the axis. Further, in the present embodiment, as shown in FIG. 6, the cross-sectional shape of the upper shielding surface 30f2b of the curved shape portion 30b is a semicircular curve having a radius R30b with the center point P30 as the center in a sectional view in the direction perpendicular to the axis. Is. The intermediate shield portion 30 can be configured only by the curved shape portion 30b, as described later.

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

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

  In the flood control device 1A according to the present embodiment, the shield 40 is configured as a member different from the peripheral wall 10. In the present 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 ventilation valve connector 1A. In the present embodiment, as shown in FIG. 4, when viewed from the extending direction of the central axis O1 of the peripheral wall 10, that is, as viewed in the axial direction, the outer edge 40e1 of the shielding portion 40 has a circular shape. In the present embodiment, the shape of the outer edge 40e1 of the shielding portion 40 is a circle having a radius R4a centered on the central axis O1 of the flood control device 1A. The opening A4 is a circle having a radius R4b centered on the central axis O1 of the overflow control device 1A.

  In the overflow control tool 1A according to the present embodiment, as shown in FIG. 5, the shielding section 40 has a curved shape section that extends downward toward the central axis O1 of the overflow control tool 1A.

  In the flood control device 1A according to the present embodiment, as shown in FIG. 5, the shielding part 40 includes an annular part 40a and a tubular curved part connected to an opening edge of the annular part 40a in a sectional view in the direction perpendicular to the axis. It has 40b and the cylindrical part 40c linked to the opening edge of the curved shape part 40b.

  In the flood control device 1A according to the present embodiment, as shown in FIG. 5, the lower shielding surface 40f1 of the shielding portion 40 has a lower shielding surface 40f1a of the annular portion 40a and a curved portion when viewed in a cross section in the direction perpendicular to the axis. It is formed of a lower side shield surface 40f1b of 40b and a lower side (outer peripheral side) shield surface 40f1c of the tubular portion 40c. In the present embodiment, as shown in FIG. 5, the cross-sectional shape of the lower shield surface 40f1a of the annular portion 40a is a straight line extending in a direction orthogonal to the air flow direction when viewed in the axial direction. In addition, in the present embodiment, as shown in FIG. 5, the cross-sectional shape of the lower shield surface 40f1b of the curved shape portion 40b is a curve having a radius R40a with the center point P40 as the center in a cross-sectional view in the direction 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 air flow direction when viewed in the direction perpendicular to the axis. In the present embodiment, as shown in FIG. 5, the center point P40 is the (radial) straight line of the lower shield surface 40f1a of the annular portion 40a and the lower shield surface 40f1c of the tubular portion 40c in the axial cross-sectional view. Is the position of the center point of the circle when the circle is drawn so that the (axial direction) straight line is tangent to each other.

  Further, in the flood control device 1A according to the present embodiment, as shown in FIG. 5, the upper shielding surface 40f2 of the shielding portion 40 is curved with the upper shielding surface 40f2a of the annular portion 40a in a cross-sectional view in the direction perpendicular to the axis. The upper side shield surface 40f2b of the shaped portion 40b and the upper side (inner circumferential side) shield surface 40f2c of the tubular portion 40c are formed. In the present embodiment, as shown in FIG. 5, the cross-sectional shape of the upper shield surface 40fa2 of the annular portion 40a is a straight line extending in a direction orthogonal to the air flow direction when viewed in a cross section in the direction perpendicular to the axis. Further, in the present embodiment, as shown in FIG. 5, the cross-sectional shape of the upper shielding surface 40f2b of the curved shape portion 40b is a curve having a radius R40b with the center point P40 as the center in a cross-sectional view in the direction 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 tubular portion 40c is a straight line extending in the air flow direction when viewed in the direction perpendicular to the axis. In addition, the shielding part 40 can be configured by only the curved shape part 40b.

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

  According to the flood control device 1A according to the present embodiment, since the shielding portion 20 shields the inside of the peripheral wall 10 along the circumferential direction of the peripheral wall 10, a large amount of drainage flows into the drain pipe. Even when the drainage flows into the overflow control device 1A, the drainage of the drainage to the upper side can be suppressed. Therefore, according to the overflow suppressor 1A according to the present embodiment, the overflow from the trap 130 can be suppressed. Further, according to the flood control device 1A according to the present embodiment, the opening A2 formed on the inner peripheral side of the shielding portion 20 allows the air or the like in the siphon drain pipe 200 to escape, so that the inside of the siphon drain pipe 200 is closed. It is possible to suppress breakage that may occur in the above. In particular, in the case of an annular shielding portion in which the shielding portion 20 shields the inside of the peripheral wall 10 in an annular shape as in the present embodiment, the shielding portion 20 functions like a chimney to allow air to flow in and out. Can be facilitated. When the shield 20 is an annular shield, the shield 20 can be easily molded when the shield 20 is formed as a separate body as in the present embodiment.

  Further, according to the flood control device 1A according to the present embodiment, the intermediate shield portion 30 shields the opening portion A20 of the shield portion 20 at a space above the shield portion 20 inside the peripheral wall 11. Therefore, even when a large amount of drainage flows into the siphon drainage pipe 200 and the drainage enters the overflow suppression device 1A through the opening A2 formed in the shielding portion 20, the drainage is sent to the upper side of the drainage. Can be suppressed. In this case, overflow water from the trap 130 can be further suppressed. In addition, according to the flood control device 1A according to the present embodiment, the opening A3 formed around the intermediate shield portion 30 allows the air or the like in the siphon drain pipe 200 to escape, so that the siphon drain pipe 200 is closed. It is possible to suppress breakage that may occur. In addition, as in the present 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 drainage water from the trap 130 to flow into the upper portion, while the air in the trap 130 can easily flow out.

  In addition, as is clear from FIGS. 3 to 5, FIG. 7 and FIG. 8, the overflow suppression device 1A according to the present embodiment has a circumferential wall 10 when the overflow suppression device 1A is viewed from the extending direction of the central axis O1. The internal structure of is a structure symmetrical about the central axis O1. Specifically, the flooding suppressor 1A has a structure in which the shield 20, the intermediate shield 30, the shield 40, and the openings A2, A3, and A4 are symmetrical about the central axis O1. In this case, the structural alignment at the time of connecting the trap 130 and the ventilation valve 140 becomes easy, and the overflow control device can be connected by a simple operation. In addition, according to the overflow suppressor according to the present invention, when the overflow suppressor 1A is viewed from the extending direction of the central axis O1, the internal structure of the peripheral wall 10 can be asymmetrical about the central axis O1. . However, in consideration of the mounting direction when mounting the overflow control device, it is preferably symmetrical.

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

  In addition, in the flood control device 1A according to the present embodiment, the intermediate shield portion 30 has a curved portion 30b that is convex toward the upper side as it goes downstream. In this case, even when the drainage overflowing from the trap 130 enters through the opening A2 formed in the shield portion 20, the drainage overflowing from the trap 130 is stored in the curved shape portion 30b of the intermediate shield portion 30 with respect to the trap 130. Since the water can be efficiently returned along the lower shield surface 30f1, overflow water from the trap 130 can be further suppressed. In particular, in the present embodiment, the upper shield surface 30f2 of the intermediate shield portion 30 has the upper shield surface 30f2a of the tubular portion 30a. In this case, the effect of preventing splashing water, which may be generated by the vibration of the disposer 111, from entering the inside of the ventilation valve 140 is obtained. In addition, in this embodiment, as shown in FIG. 6, the intermediate shielding portion 30 is formed in a dome shape in a sectional view in the direction perpendicular to the axis, but a conical or pyramidal shape such as an umbrella shape or a cube. It can also be shaped into a shape.

  Further, in the flood control device 1A, the shields 20 and the intermediate shields 30 are alternately arranged from the lower side to the upper side, and three or more in total are repeatedly arranged. In the present embodiment, the flooding suppressor 1A is configured such that the shields 20, the intermediate shields 30, and the shields 40 are alternately arranged from the lower side to the upper side in a total of three repeats. In such a case, overflow of water from the trap 130 can be further suppressed by increasing the number of shields.

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

  By the way, in the siphon drainage system 100 of FIG. 1, the trap 130, the ventilation valve 140, the tubular peripheral wall 10 arranged between the trap 130 and the ventilation valve 140, and the inside of the peripheral wall 10 are connected to each other. 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 an upper side inside the peripheral wall 10 with a space therebetween. A fixing piece 31 for fixing the other shielding part 30 to the peripheral wall 10 so as to form another opening A3 around the other shielding part 30. The siphon drainage system 100 of FIG. 1 has a drainage pipe structure A as illustrated. As shown in the region A, the drainage pipe structure A according to the present embodiment includes the trap 130, the ventilation valve 140, and the overflow suppressing device 1A disposed between the trap 130 and the ventilation valve 140. As shown in FIG. 5, the overflow control device 1A includes a peripheral wall 10 arranged between the trap 130 and the ventilation valve 140. In addition, the flood control device 1A has a shield wall 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 shield wall 20. The intermediate shield portion 30 is fixed to the peripheral wall 10 so as to form the intermediate shield portion 30 which is shielded at a space on the upper side inside 11 and the other opening A3 around the intermediate shield portion 30. The fixing piece 31 is provided. Therefore, the drainage pipe structure A according to the present embodiment has a drainage pipe structure in which overflow from the trap 130 is suppressed. In addition, in the drainage pipe structure 1A according to the present embodiment, the above configuration is an attachment-type drainage pipe structure by disposing the overflow suppressing device 1A between the trap 130 and the ventilation valve 140. According to the drainage pipe structure of the present invention, if the tubular peripheral wall 10, the shielding portion 20, the other shielding portion 30, and the fixing piece 31 can be arranged between the trap 130 and the ventilation valve 140, these will overflow. Assembling as the suppressor 1A is not essential.

  FIG. 9 is a perspective side view schematically showing an overflow control tool 1B according to the second embodiment of the present invention. FIG. 10 is a perspective sectional view schematically showing the flooding suppressor 1B corresponding to the AA section in FIG. Hereinafter, in the flood control device 1B according to the present embodiment, the same components as those of the flood control device 1A according to the first embodiment will be denoted by the same reference numerals, and description thereof will be omitted.

  The overflow suppressing tool 1B according to the present embodiment is one in which the peripheral wall 10, the shield 20, the intermediate shield 30, and the shield 40 are integrally formed. In this case, the overflow control tool 1B can be integrally formed of the same material such as resin.

  The above description only describes some embodiments of the present invention, and various modifications can be made according to the claims. For example, if the shielding portion 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 provided along the circumferential direction of the peripheral wall 10. It may be shielded. That is, the shield 20 is not limited to the annular shield. Further, it is preferable that the shielding portion 20 is a lower portion inside the peripheral wall 10 and at least at an upstream position where a flow at the time of drainage can be introduced. A specific example of such a shielding portion 20 is a semicircular shielding portion as viewed in the axial direction of the peripheral wall 10. In this case, the upstream side to which the flow at the time of drainage may be introduced is blocked by the blocking portion 20, while the air flow is formed on the downstream side by the gap formed between the blocking portion 20 and the inner peripheral surface of the peripheral wall 10. Is acceptable. The non-annular shield 20 is effective when the inner structure of the peripheral wall 10 is asymmetric.

  In each of the above-described embodiments, the overflow control tools 1A and 1B are configured separately from the ventilation valve 140 because of their versatility with existing ventilation valves, but they can be formed integrally with the ventilation valve 140. Further, although the overflow control tool according to the present invention is preferably arranged between the ventilation valve and the drain pipe, it can be arranged between the ventilation port and the drain pipe. Further, in each of the above-described embodiments, the flood control devices 1A and 1B are arranged on the trap 130, but at the positions where the air in the siphon drain pipe 200 can be discharged, the connection pipe 120, the trap 130, The straight pipe 150, the horizontal pipe 160, and the vertical pipe 170 can be arranged at any positions. Furthermore, the various configurations adopted in the above-described embodiments can be used in combination with each other. The various configurations adopted in the above-described embodiments can be appropriately replaced with each other.

  1A: overflow control device (first embodiment), 1B: overflow control device (second embodiment), 10: peripheral wall, 11: lower end part, 12: upper end part, 20: shielding part, 20a: annular part, 20b: curved portion, 20c: tubular portion, 30: intermediate shielding portion (other shielding portion), 30a: tubular portion, 30b: curved portion, 31: fixing piece, 40: shielding portion, 40a: annular portion , 40b: curved portion, 40c: tubular portion, A: drainage pipe structure, A2: opening portion of shielding portion, A3: opening portion around other intermediate shielding portion (other opening portion), A4: opening of shielding portion Part, 100: Siphon drainage system, 110: Water supply equipment, 120: Connection pipe, 130: Trap, 131: First descending part, 132: First folding part, 132a: Storage part, 133: Ascending part, 134: No. 2 folds, 135: 2 descender, 140: vent valve, 150: straight tube, 160: crosscut pipe, 170: Tatekan, 180: merging joint, 190: standpipe, 200: siphon drain pipe

Claims (7)

With a cylindrical peripheral wall that can be connected to a drainage pipe,
A shielding portion that shields the inside of the peripheral wall along the circumferential direction of the peripheral wall,
A flood control device. The shielding portion is an annular shielding portion that shields the inside of the peripheral wall in an annular shape, and an opening formed on the inner peripheral side of the shielding portion has an interval on the upper side inside the peripheral wall. Other shields that are placed and shielded,
A fixing piece for fixing the other shield to the peripheral wall so as to form another opening around the other shield,
The overflow suppression device according to claim 1, further comprising:   The overflow control device according to claim 1 or 2, wherein when the overflow control device is viewed from the extending direction of the central axis of the overflow control device, the internal structure of the peripheral wall is a structure symmetrical about the axis. Ingredient   The overflow control tool according to any one of claims 1 to 3, wherein the shielding portion has a curved portion that is directed toward a lower side toward the central axis of the overflow control tool.   The flood control device according to claim 2, wherein the other shielding part has a curved portion that is convex toward the upper side toward the central axis of the flood control device.   The overflow control tool according to claim 2, wherein the shielding portion and the other shielding portion are alternately arranged from the lower side to the upper side in a total of three or more. Drainage pipe,
With a vent valve,
The drain pipe and a cylindrical peripheral wall arranged between the ventilation valve,
A shielding portion that shields the inside of the peripheral wall along the circumferential direction of the peripheral wall,
Another opening, which shields the opening formed in the shield with an interval on the upper side inside the peripheral wall,
A fixing piece for fixing the other shield to the peripheral wall so as to form another opening around the other shield,
With a drainage pipe structure.

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