JP6944404B2 - Protective member for vent valve, vent valve device, and piping structure - Google Patents

Description

The present invention relates to a protective member for a vent valve attached to the piping material in order to eliminate the negative pressure inside the piping material, a vent valve device having the protective member, and a piping structure.

Generally, drainage pipes are installed in drainage systems such as kitchen sinks, bathtubs, and toilets installed in buildings to treat wastewater. Such a drainage system piping structure includes a drainage pipe having a trap portion curved in an S-shape or a U-shape, and is configured to collect drainage in the trap portion. The residual drainage collected in this trap part blocks the inside of the drainage pipe to prevent the foul odor drifting from the downstream side of the drainage pipe from leaking into the room, and also prevents the invasion of pests creeping up from the downstream side of the drainage pipe. .. However, if the air pressure in the drainage pipe drops to a negative pressure due to a large amount of water flowing through the drainage pipe or the like, the residual drainage in the trap portion may be sucked and flowed downstream. In order to prevent the water seal breakage in such a trap portion, a vent valve is arranged downstream of the trap portion of the drain pipe. Then, when the inside of the drain pipe becomes negative pressure, the outside air is sucked into the drain pipe through the ventilation valve to eliminate the negative pressure state of the drain pipe, thereby preventing the trap portion from breaking the water seal.

For example, Patent Document 1 discloses a vent valve capable of more quickly and surely relieving negative pressure in a piping material. Hereinafter, in the paragraph, the reference numerals of Patent Document 1 are shown in parentheses. The vent valve (100) is housed in a vent valve main body (110) connected to a drain pipe (P) and the vent valve main body (110), and a valve body (130) to which a first magnet (M1) is connected. To protect the second magnet holder (150) that holds the second magnet (M2) so as to be movable along the valve shaft (135) of the valve body (130) and the valve body (130). A cover body (170) attached to one end of the vent valve main body (110) is provided. Further, a circular vent (112) is formed which is opened and closed by the valve body (130). A valve seat (113) is provided on the lower end side so as to border the vent (112). The vent (112) is closed by the packing (132) of the valve body (130) coming into close contact with the valve seat (113). A connection port (119) for connecting to the connection end (P') of the drain pipe (P) is formed at the lower end of the ventilation valve main body (110). The vent valve (100) is attached to the drain pipe (P) by fitting the inner cylinder wall (119a) of the connection port (119) into the connection end (P') of the drain pipe (P). In the piping structure (10), when the negative pressure in the drain pipe (P) becomes large, a pressure difference occurs inside and outside the ventilation valve main body (110) via the valve body (130), and the pressure difference becomes the first magnet (1st magnet). When the repulsive force between the M1) and the second magnet (M2) is exceeded, the valve body (130) starts moving toward the open position along the axial direction of the valve shaft (135). When the valve body (130) moves to the open position, the outside air is sucked through the vent (112). As a result, the negative pressure in the drain pipe (P) is eliminated.

Japanese Unexamined Patent Publication No. 2015-232369

However, in the piping structure of Patent Document 1, the connection port on the drain pipe side of the vent valve is open to the drain pipe, and the inside of the vent valve main body is exposed in the space on the drain pipe side. Therefore, when the drainage passes through the drainage pipe, the drainage often bounces and adheres to the valve body inside the ventilation valve main body. In this way, due to the dirt adhering to the valve body, the sealing by the valve body becomes insufficient, and there is a risk that the foul odor in the drain pipe may leak to the outside or the valve body may not operate normally. It was an issue.

The present invention has been made to solve the above problems, and an object of the present invention is to prevent dirt from adhering to the ventilation valve from the inside of the piping material without obstructing the inflow of outside air through the ventilation valve as much as possible. It is an object of the present invention to provide a protective member for a vent valve, a vent valve device, and a piping structure.

The protective member according to claim 1 is for a ventilation valve that protects the ventilation valve from the axially deep side of the cylinder portion in a piping material having a ventilation cylinder portion to which the ventilation valve main body of the ventilation valve is mounted. It is a protective member
A louver portion is provided which is arranged on the axially deep side of the cylinder portion with respect to the vent valve so as to cover the vent valve at least partially from the axial deep side.
The louver portion includes a plurality of annular blades arranged concentrically apart from each other, and a ventilation path that allows air to flow from the ventilation valve to the piping material between adjacent blades. Is formed.

The protective member according to claim 2 is the protective member according to claim 1, wherein each of the blades is inclined so that the inner peripheral end is located on the deep side in the axial direction from the outer peripheral end with respect to the axial direction. Moreover, a part or all of the adjacent blades in the axial direction are polymerized.

The protective member according to claim 3 is the protective member according to claim 1 or 2, wherein in the plurality of blades, the outer peripheral side blades are arranged on the axially deeper side than the inner peripheral side blades. It is characterized by being.

The protective member according to claim 4 is the protective member according to any one of claims 1 to 3, and is inserted into the tubular portion and forms an accommodation space inside which at least a part of the vent valve is accommodated. It is characterized by further providing a tubular wall portion.

The protective member according to claim 5 is the protective member according to any one of claims 1 to 4, so that the protective member can be connected to a plurality of types of piping materials having different diameters by extrapolation or interpolation. It is characterized in that a plurality of connecting portions having different diameters are further provided.

The vent valve device according to claim 6 is a vent valve device installed in a tubular portion of a piping material.
It has a vent that communicates the inside and outside of the piping material, and has a vent valve body that is attached to the cylinder and a valve body that is movably supported by the vent valve body so that the vent can be opened and closed. Ventilation valve and
The protective member according to any one of claims 1 to 5, which protects the vent valve from the deep side in the axial direction of the tubular portion, is provided.

The vent valve device according to claim 7 is the vent valve device according to claim 6, wherein the protective member is a separate body from the vent valve main body and is selectively attached to the cylinder portion. It is characterized by that.

The piping structure according to claim 8 includes two or more drainage pipes and
It has three or more connection ports, connects the two or more drainage pipes through a part of the connection ports of the plurality of connection ports, and connects the two or more drainage pipes to at least one of the plurality of connection ports for ventilation. Drainage pipe joints with defined cylinders and
Ventilation having a vent that communicates with the inside and outside of the drain pipe, a vent valve body installed in the cylinder, and a valve body that is movably supported by the vent valve body so that the vent can be opened and closed. With a valve
The protective member according to any one of claims 1 to 5 is provided in the tubular portion so as to protect the vent valve from the deep side in the axial direction of the tubular portion.

According to the protective member according to claim 1, the louver portion is arranged on the axial deep side of the tubular portion with respect to the vent valve, and covers the vent valve at least partially from the axial deep side, thereby forming the inside of the drain pipe. It is possible to effectively prevent water splashes from the drainage from adhering to the ventilation valve. Further, the louver portion is composed of a plurality of annular blades separated from each other in the radial direction. As a result, a ventilation path that allows the inflow of outside air from the ventilation valve to the piping material is secured between the adjacent blades, and it is possible to suppress a decrease in the amount of outside air inflow from the outside. In particular, since the ventilation path has an annular opening, outside air can be evenly introduced into the piping material from all directions in the radial direction, so that the valve body is tilted (deviation) to operate the valve body. It is possible to eliminate the negative pressure inside the piping material without hindering it. Therefore, the protective member of the present invention can prevent dirt from adhering to the vent valve without obstructing the inflow of outside air through the vent valve as much as possible.

According to the protective member according to claim 2, in addition to the effect of the invention of claim 1, each blade body is inclined with respect to the axial direction, and the outer peripheral side surface of the blade body is the deep side of the piping material. Arranged to face. As a result, the blade body effectively blocks the drainage that bounces from the outer peripheral side to the inner peripheral side of the vent valve, and it is possible to prevent the drainage from being applied to the vent valve beyond the louver portion. Further, by at least partially polymerizing in the axial direction of the adjacent blades, the adjacent blades can cooperate to more reliably protect the vent valve from water splashes.

According to the protective member according to claim 3, in addition to the effect of the invention of claim 2, the blades on the outer peripheral side are arranged deeper in the axial direction than the blades on the inner peripheral side. That is, since the center of the louver portion is formed so as to be recessed, it is possible to prevent the louver portion itself from becoming unnecessarily dirty while ensuring the amount of airflow.

According to the protective member according to claim 4, in addition to the effect of the invention according to any one of claims 1 to 3, the cylinder wall portion is configured to be inserted into the cylinder portion, and a vent valve is provided inside. It is configured to form a containment space that accommodates at least a portion of the. That is, by inserting the cylinder wall portion into the cylinder portion while holding the ventilation valve in the accommodation space of the cylinder wall portion, the ventilation valve and the protective member can be easily installed on the piping material.

According to the protective member according to claim 5, in addition to the effect of the invention according to any one of claims 1 to 4, a plurality of types of pipes having different diameters are provided by providing a plurality of connecting portions each having a different diameter. It can be connected to the material by extrapolation or interpolation.

According to the vent valve device according to claim 6, the effect of any one of claims 1 to 5 can be exhibited as a vent valve device. Therefore, the vent valve device of the present invention can close the piping material and introduce outside air into the piping material at the time of negative pressure to eliminate the negative pressure, and allow the inflow of outside air through the ventilation valve as much as possible. It is possible to prevent dirt from adhering to the ventilation valve without hindering it.

According to the vent valve device according to claim 7, in addition to the effect of the invention of claim 6, since the vent valve and the protective member are separate bodies, the vent valve can be used in an environment where there is little risk of water splashing. When installing on the piping material, it is possible to omit the protective member and install only the ventilation valve in order to maximize the inflow of outside air.

According to the piping structure according to claim 8, the effect of the protective member according to any one of claims 1 to 5 can be exhibited as the piping structure. That is, the piping structure of the present invention can prevent dirt from adhering to the vent valve without obstructing the inflow of outside air through the vent valve as much as possible.

The schematic perspective view of the vent valve device of one Embodiment which concerns on this invention. A perspective view of the vent valve of the vent valve device of FIG. 1 from above (a) and a perspective view from below (b). (A) plan view, (b) front view, (c) side view and (d) bottom view of the vent valve of FIG. 3 (a) plan view, (b) front view, (c) side view, and (d) bottom view of the vent valve of FIG. 3 with the lid removed. A cross-sectional view taken along the line AA of the vent valve of FIG. BB sectional view of the vent valve of FIG. FIG. 3 is a cross-sectional view taken along the line CC of the vent valve of FIG. An exploded perspective view of the vent valve of FIG. (A) A perspective view from above and (b) a perspective view from below of the protective member of the ventilation valve device of FIG. 1. 9 (a) plan view, (b) front view and (c) bottom view of the protective member of FIG. FIG. 10 is a cross-sectional view taken along the line DD of the protective member of FIG. FIG. 10 is a cross-sectional view taken along the line EE of the protective member of FIG. FIG. 10 is a cross-sectional view taken along the line FF of the protective member of FIG. An exploded perspective view of a piping structure according to an embodiment of the present invention. FIG. 4 is a schematic cross-sectional view of the piping structure of FIG. FIG. 15 is a partially enlarged cross-sectional view of the piping structure of FIG. 15 in a state where the communication passage is closed. FIG. 15 is a partially enlarged cross-sectional view of the piping structure of FIG. 15 in a state where the communication passage is open. Schematic cross-sectional view of the piping structure of another embodiment according to the present invention. FIG. 3 is a cross-sectional view of a protective member according to another embodiment of the present invention. (A) plan view, (b) front view and (c) GG sectional view of the protective member of another embodiment according to the present invention. FIG. 2 is a schematic cross-sectional view showing a piping structure in which the protective member and the vent valve of FIG. 20 are installed. FIG. 3 is a cross-sectional view of a protective member according to another embodiment of the present invention.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. The shapes of the figures referred to in the following description are conceptual diagrams or schematic views for explaining suitable shape dimensions, and the dimensional ratios and the like do not always match the actual dimensional ratios. That is, the present invention is not limited to the dimensional ratio in the drawings. Further, it goes without saying that the vertical and horizontal directions in the present invention are merely concepts indicating relative positions, and these can be interchanged and applied.

The piping structure 10 of one embodiment of the present embodiment is a drainage system piping structure in which a drainage pipe (piping material) is arranged. The piping structure 10 is provided with a hollow tubular portion 13 that opens to the outside to form a communication passage that communicates with the inside and outside of the piping material, and a ventilation valve is provided in the opening of the tubular portion 13 in order to close the communication passage. Devices (vent valve 100 and protective member 150) are installed (see FIG. 14). In the present embodiment, the piping material is a general concept including at least a drain pipe 11, a drain pipe joint 12, and a combination thereof. That is, it goes without saying that the present embodiment is merely an example of the present invention and does not limit its use and configuration. Hereinafter, the vent valve device of the present embodiment and its components will be described with reference to the drawings.

As shown in FIG. 1, the vent valve device is a device formed by combining a vent valve 100 and a protective member 150. The ventilation valve 100 is installed in the cylindrical tubular portion 13 of the piping material, and is configured to selectively close and communicate the communication passage according to the pressure fluctuation inside the piping material. The protective member 150 is installed in the tubular portion 13 of the piping material, and is configured to protect the vent valve 100 from the axially deep side of the tubular portion 13. In the present embodiment, the vent valve device is installed on the piping material with the vent valve 100 attached to the protective member 150. In the vent valve device of the present embodiment, since the vent valve 100 and the protective member 150 are formed separately, when the vent valve 100 is installed on the piping material in an environment where there is little risk of water splashing, In order to maximize the inflow of outside air, it is possible to omit the protective member 150 and selectively install only the ventilation valve 100.

A vent valve 100 according to an embodiment of the present invention will be described with reference to FIGS. 2 to 8. 2 (a) and 2 (b) are perspective views of the vent valve 100. 3 (a) to 3 (d) are a plan view, a front view, a side view, and a bottom view of the vent valve 100. 4 (a) to 4 (d) are a plan view, a front view, a side view, and a bottom view of the vent valve 100 in which the cover body 140 is omitted for convenience of explanation. 5 and 6 are a cross-sectional view taken along the radial direction of the vent valve 100 and a cross-sectional view taken along the line BB. FIG. 7 is a cross-sectional view taken along the line CC of the vent valve 100. FIG. 8 is an exploded perspective view of the vent valve 100.

As shown in FIGS. 2 and 3, the vent valve 100 includes a vent valve main body 110 on which a piping material (cylinder portion 13) is installed and a valve body movably supported by the vent valve main body 110 in the axial direction. The 120, the packing 130 fixed inside the vent valve main body 110 and arranged so as to be in close contact with the valve body 120, and the upper end (vent hole 110a side) of the vent valve main body 110 so as to protect the valve body 120. The cover body 140 attached to the above is provided.

The vent valve main body 110 has a cylindrical shape that extends along the axial direction and is open at both ends in the axial direction. That is, the ventilation valve main body 110 has a ventilation port 110a at the upper end (outside side of the piping material) for taking in outside air into the piping material, and a connection port connected to the piping material at the lower end (inside side of the piping material). It has 110b. The vent 110a and the connection 110b extend on a plane perpendicular to the axial direction. A valve body accommodating space 110c for movably accommodating the valve body 120 is provided in the space between the vent port 110a and the connection port 110b of the vent valve main body 110.

Further, the ventilation valve main body 110 stands from the peripheral wall 111 surrounding the valve body accommodating space 110c, the upper wall 112 which is connected to the upper end of the peripheral wall 111 and forms the opening peripheral surface of the ventilation port 110a, and the upper wall 112. It is provided with the provided vertical wall 113.

The peripheral wall 111 has an outer peripheral surface that is inserted into the tubular portion of the piping material and extends in the axial direction along the inner peripheral surface of the tubular portion. Further, a connecting port 110b facing downward is formed by the opening end surface on the lower side of the peripheral wall 111. Then, as shown in FIGS. 5 and 6, a concave groove 111a extending in the circumferential direction is formed in the vicinity of the connection port 110b of the peripheral wall 111. A water blocking member 118 made of annular rubber is housed in the recessed groove 111a. The water blocking member 118 slightly protrudes from the outer peripheral surface of the peripheral wall 111, and when the ventilation valve 100 is attached, the water blocking member 118 is crushed and adhered to the inner peripheral surface of the piping material cylinder portion to stop between the ventilation valve main body 110 and the piping material. Functions like water.

The upper wall 112 extends in a ring band shape so as to face upward around the vent 110a that opens with a predetermined diameter. Further, a main body side holding surface 115 is provided on the periphery of the vent 110a inside the vent valve main body 110 of the upper wall 112. That is, as shown in FIGS. 5 and 6, an annular band-shaped holding surface 115 on the main body side is defined on the opening peripheral surface of the upper wall 112 inside the vent valve main body 110 so as to face the valve body 120. .. In a cross-sectional view, the main body-side holding surface 115 is inclined so that the outer peripheral side is lowered with respect to the axial direction, extends in a straight line, and faces diagonally downward (inward in the radial direction and downward in the axial direction).

Further, as shown in FIGS. 4 and 7, three beam-shaped portions 112a extending toward the center in the radial direction are formed on the upper surface of the upper wall 112 at equal intervals. The main body side magnet holding portion 117 is supported at the center of the vent 110a by these beam-shaped portions 112a. Further, as shown in FIGS. 5 and 6, the main body side magnet holding portion 117 is provided with a shaft hole 117a that penetrates vertically and inserts the valve shaft 123 of the valve body 120. Then, in the main body side magnet holding portion 117, the annular main body side magnet 117b is fitted and held in the groove around the shaft hole 117a. The main body side magnet 117b is made of a permanent magnet such as a neodymium magnet, and functions to act a repulsive force on the valve body side magnet 124a described later.

The standing walls 113 are erected in pairs so as to face each other from substantially the center in the radial direction of the upper wall 112. The pair of standing walls 113 have an arc shape so that a concave curved surface is directed inward in the radial direction in a plan view. That is, the outer peripheral surface of the peripheral wall 111, the inner peripheral edge of the upper wall 112, and the outer surface of the vertical wall 113 are located on concentric circles (of different diameters). The outer surface of the vertical wall 113 is positioned so as to recede inward in the radial direction from the outer peripheral surface of the peripheral wall 111. Further, at the upper end of the vertical wall 113, a connecting piece 113a for fixing the cover body 140 in a fitting manner is provided so as to project upward.

A packing 130 is attached to the inside of the vent valve main body 110 so as to cover the main body side holding surface 115. The packing 130 is an annular body made of elastically deformable rubber or soft synthetic resin having an opening in the center. The packing 130 includes a sealing portion 131 located on the inner peripheral side and a fixing portion 138 located on the outer peripheral side thereof and fixed to the ventilation valve main body 110. As shown in FIGS. 5 and 6, the sealing portion 131 of the packing 130 extends radially inward from the inner wall surface of the vent valve main body 110 and covers the main body side holding surface 115. On the other hand, the fixing portion 138 of the packing 130 is embedded and fixed inside the inner wall surface (peripheral wall 111, upper wall 112) of the ventilation valve main body 110.

The valve body 120 is housed in the valve body accommodating space 110c of the vent valve main body 110, and is supported by the vent valve main body 110 so as to move along the axial direction. The valve body 120 includes a valve body 121 formed in a circular cup shape in a plan view, a valve shaft 123 extending upward from the center of the valve body 121, and a valve body side magnet formed at the upper end of the valve shaft 123. It is provided with a holding unit 124.

A valve body side holding surface 122 is formed on the upper surface of the valve body main body 121 on the outer peripheral side. As shown in FIGS. 5 and 6, in a cross-sectional view cut along the radial direction, the valve body side holding surface 122 is inclined so as to be lowered on the outer peripheral side with respect to the axial direction and extends in a straight line, and is obliquely upward. It faces in the direction (outer in the radial direction and upper in the axial direction). That is, the valve body side holding surface 122 faces the main body side holding surface 115 of the ventilation valve main body 110 with the packing 130 interposed therebetween. Then, the vent port 110a is inclined with respect to the plane extending so that the valve body side holding surface 122 and the main body side holding surface 115 face each other.

As shown in FIGS. 5 to 7, the valve shaft 123 is arranged on the central axis of the ventilation port 110a and penetrates the shaft hole 117a of the main body side magnet holding portion 117 of the ventilation valve main body 110. A valve body side magnet holding portion 124 is provided at the upper end of the valve shaft 123, which is located above the main body side magnet holding portion 117 and has a diameter larger than the diameter of the shaft hole 117a. The valve body side magnet holding portion 124 holds the valve body side magnet 124a inside. The valve body side magnet 124a is made of a permanent magnet such as a neodymium magnet. The valve body side magnet 124a is arranged so as to repel each other with respect to the main body side magnet 117b. That is, the opposing magnetic poles of the main body side magnet 117b and the valve body side magnet 124a are the same. Then, a magnetic repulsive force (repulsive force) is generated between the main body side magnet 117b and the valve body side magnet 124a, and the valve body 120 is urged to be lifted upward by the magnetic force. As a result, the valve body side holding surface 122 of the valve body main body 121 is pressed against the packing 130 to close the vent 110a. On the other hand, when a downward force exceeding the magnetic force is applied to the valve body 120 (generally when the inside of the piping material becomes negative pressure), the valve body 120 moves downward along the axial direction. , The valve body side holding surface 122 is separated from the packing 130, and the vent 110a is opened. At this time, since the valve shaft 123 moves through the shaft hole 117a, the axial movement of the valve body 120 is stably guided by the main body side magnet holding portion 117.

The cover body 140 is configured to cover the vent port 110a from above in order to protect or protect the inside of the vent valve main body 110 and the valve body 120 from the outside of the tubular portion 13. The cover body 140 has a circular shape in a plan view. Two slit-shaped connecting holes 141 are formed on the outer peripheral side of the cover body 140. Further, two notches 142 are formed in a substantially rectangular shape in a plan view on the radial outer side of the two connecting holes 141 on the outer peripheral edge of the cover body 140. Then, by fitting the connecting piece 113a of the vent valve main body 110 into the connecting hole 141, the cover body 140 is detachably fitted to the vent valve main body 110.

FIG. 8 is an exploded perspective view of the vent valve 100 of the present embodiment. As shown in FIG. 8, the vent valve main body 100 is formed by combining the upper split body 110-1 and the lower split body 110-2. The upper split body 110-1 has a female threaded portion at the lower end, the lower split body 110-2 has a male threaded portion at the upper end, and the upper split body 110-1 and the lower split body 110-2 can be screwed together. Is. Then, the packing 130 is fixed by sandwiching the packing 130 between the upper division body 110-1 and the lower division body 110-2 and screwing the upper division body 110-1 and the lower division body 110-2. The portion 138 is fixed so as to be embedded in the wall, and the vent valve main body 110 is constructed. Further, the valve shaft 123 of the valve body 120 is inserted into the shaft hole 117a of the ventilation valve main body 110 from below, and the valve body side magnet holding portion 124 is screwed or adhered to the upper end of the valve shaft 123, whereby the valve body 120 is formed. It is supported by the vent valve main body 110 to prevent it from falling off. Then, by inserting the connecting piece 113a extending upward from the tip of the standing wall 113 of the vent valve main body 110 into the connecting hole 141 of the cover body 140, the cover body 140 is detachably fitted to the vent valve main body 110. NS. In this way, the vent valve 100 is constructed. The upper split body 110-1, the lower split body 110-2, the valve body 120, and the cover body 140 of the present embodiment are formed by molding a hard synthetic resin material, but the present invention is not limited thereto. Those skilled in the art can arbitrarily select the material.

Next, the protective member 150 according to the embodiment of the present invention will be described with reference to FIGS. 9 to 13. 9 (a) and 9 (b) are perspective views of the protective member 150. 10 (a) to 10 (d) are a plan view, a front view, and a bottom view of the protective member 150. 11, 12 and 13 are a DD cross-sectional view, an EE cross-sectional view and an FF cross-sectional view of the protective member 150.

The protective member 150 includes an inner cylinder wall portion 151, an outer cylinder wall portion 152 that surrounds the inner cylinder wall portion 151 from the outside in the radial direction, a louver portion 153 formed inside the inner cylinder wall 151, and an inner cylinder wall. It is provided with an annular top wall portion 154 that connects the portion 151 and the outer cylinder wall portion 153 at the upper end portion (outside side of the drain pipe) in the axial direction.

The inner cylinder wall portion 151 has a hollow cylindrical shape extending in the axial direction. An opening 151a through which the ventilation valve 100 can be inserted is formed at the upper end of the inner cylinder wall portion 151. As shown in FIG. 11, the inner cylinder wall portion 151 has a diameter reduced in the lower portion with respect to the upper portion, and a step is formed between the inner and outer surfaces. An accommodation space 151b for accommodating at least a part of the vent valve 100 (vent valve main body 110) is formed in the upper portion inside the inner cylinder wall portion 151. The diameter of the accommodation space 151b (inner diameter of the upper portion of the inner cylinder wall portion 151) is determined so that the peripheral wall 111 of the vent valve main body 110 can be inserted and the water blocking member 118 can be brought into close contact with the inner surface of the inner cylinder wall portion 151. ing. The inner cylinder wall portion 151 can lock the ventilation valve 110 at a step on the inner surface side. On the other hand, a buffer space 151c for keeping the ventilation valve 100 or the accommodation space 151b away from the drainage inside the piping material is formed in the lower portion inside the inner cylinder wall portion 151. Further, the inner cylinder wall portion 151 is configured to be inserted into the cylinder portion 13 having a predetermined diameter of the piping material. The outer diameter of the lower portion of the inner cylinder wall portion 151 is set to be substantially equal to the inner diameter of the cylinder portion 13 of the piping material so that the inner cylinder wall portion 151 fits into the cylinder portion 13. On the outer surface of the inner cylinder wall portion 151, a first connection portion 151d for connecting to the cylinder portion 13 having a first diameter is defined. Further, when the first connecting portion 151d is connected to the tubular portion 13, a step on the outer surface side of the inner tubular wall portion 151 can lock the end surface of the tubular portion 13.

The outer cylinder wall portion 152 has a hollow cylindrical shape having a diameter larger than that of the inner cylinder wall portion 151 and extending in the axial direction. The outer tubular wall portion 152 is closed at the upper end by the top wall portion 154 and opened at the lower end. Further, as shown in FIG. 13, a plurality of ribs 155 extending in the radial direction are provided between the inner surface of the outer cylinder wall portion 152 and the outer surface of the inner cylinder wall portion 151. Each rib 155 extends from the axial upper end of the protective member 150 to the vicinity of the axial center. That is, a space for connecting the tubular portion 13 to the first connecting portion 151d is secured inside the outer tubular wall portion 152. The outer tubular portion 152 is configured to be inserted into the larger diameter tubular portion 13'(see FIG. 18) of the piping material. The outer diameter of the outer cylinder wall portion 152 is set to be substantially equal to the inner diameter of the second cylinder portion 13'of the piping material so that the outer cylinder wall portion 152 fits into the cylinder portion 13'. A second connection portion 152a for connecting to the cylinder portion 13'of the second diameter is defined on the outer surface of the outer cylinder wall portion 152. Further, when the second connecting portion 152a is connected to the tubular portion 13', the flange 154a of the top wall portion 154 can lock the end face of the tubular portion 13'. The second connection portion 152a may be formed on the inner surface of the outer cylinder wall portion 152, and the outer cylinder wall portion 152 may be extrapolated to the cylinder portion.

The louver portion 153 is integrally formed on the inner surface of the inner cylinder wall portion 151, and is arranged near the lower end portion (buffer space 151c) in the axial direction of the inner cylinder wall 151. That is, the louver portion 153 is arranged on the axially deep side of the tubular portion 13 with respect to the vent valve 100 (particularly, the valve body 120) so as to cover the vent valve 100 accommodated in the accommodation space 151b from the axially deep side. .. Further, the louver portion 153 is arranged at least inside the cylinder portion 13 when the protective member 150 is installed in the cylinder portion 13. The louver portion 153 includes a blade body (or an annular plate body) 153a having a plurality of (three in the present embodiment) annular thin plate shapes arranged concentrically (with different diameters) so as to be separated from each other. The outer peripheral edge of the outermost blade body 153a is integrally connected to the inner surface of the inner cylinder wall portion 152. These blade bodies 153a are arranged at equal intervals in the radial direction. Further, the adjacent blade bodies 153a are connected to each other by a plurality of thin bar members 153b extending in the radial direction. A ventilation path 153b is formed in the gap between the adjacent blades 153a to allow air to flow from the ventilation valve 100 into the piping material. A central opening 153d is formed in the center of the innermost blade body 153a. The central opening 153d of the innermost annular blade body 153a may be closed by a meat portion.

Further, as shown in FIGS. 11 and 12, each blade body 153a is arranged in parallel with each other, and its inner peripheral end is located on the axial deep side (lower side) of the outer peripheral end with respect to the axial direction. It is inclined like. As described above, since each blade body 153a is inclined with respect to the axial direction, the area of the ventilation path 153d in the bottom view (see FIG. 10C) is smaller than the area of the actual ventilation path 153d. Moreover, it is relatively smaller than the area of the blade body 153a exposed on the deep side of the piping material. That is, it is effective that the inclined blade body 153a exposes the ventilation valve 100 arranged in the accommodation space 151b to the deep side of the piping material via the ventilation passage 153a without sacrificing the ventilation of the ventilation passage 153d. It is suppressed to. In this embodiment, the inclination angle is about 45 degrees. Considering both the protection (covering area) of the vent valve 100 and the inflow amount of outside air, the inclination angle is preferably about 30 to 60 degrees (although not limiting the present invention).

Further, the adjacent blade bodies 153a are arranged so as to be displaced by a predetermined distance in the axial direction. Further, a part of the adjacent blades 153a in the axial direction are overlapped with each other (in the radial direction). On the other hand, the radial components of the adjacent blades 153a do not polymerize with each other (axially). Then, in the present embodiment, the blade body 153a on the outer peripheral side is arranged on the deep side in the axial direction with respect to the blade body 153a on the inner peripheral side. In other words, the louver portion 153 is formed in a concave shape so as to recede from the deep side in the axial direction.

FIG. 14 is an exploded perspective view of the piping structure 10 of the present embodiment. As shown in FIG. 14, the piping material of the present embodiment is configured by connecting two drain pipes 11 via a drain pipe joint 12 branched in three directions. The drainage pipe joint 12 has three connection ports, two drainage pipes 11 are linearly connected to the two connection ports, and one connection port is opened upward. That is, the drainage pipe joint 12 (a type of piping material) has a tubular portion that opens to the outside and extends in the axial direction so as to form a communication passage that communicates with the inside and outside of the piping material (drainage pipe 11 or drainage system). 13 is provided. A vent valve device (vent valve 100 and protective member 150) is attached to the hollow tubular portion 13 so as to selectively close the communication passage. As shown in FIG. 14, the vent valve 100 and the protective member 150 are pushed into the tubular portion 13 and installed. In addition, the drainage pipe, the drainage pipe joint, and the drainage system are generically referred to as a piping material in this specification.

Subsequently, the piping structure 10 of the present embodiment will be described with reference to FIGS. 15 to 17. FIG. 15 is a schematic cross-sectional view of the piping structure 10 in which the ventilation valve 100 and the protective member 150 are installed in the tubular portion 13. FIG. 16 is an enlarged cross-sectional view of the valve body 120 of the piping structure 10 in a closed state. FIG. 17 is an enlarged cross-sectional view of the pipe structure 10 in a state where the valve body 120 is open.

As shown in FIG. 15, the inner cylinder wall portion 151 of the protective member 150 is connected to the cylinder portion 13 (having a first diameter) via the first connecting portion 151d. Specifically, in a state where the inner cylinder wall portion 151 is inserted into the cylinder portion 13, the open end of the cylinder portion 13 engages with the step on the outer surface of the inner cylinder wall portion 151, and the lower end of the inner cylinder wall portion 151 is engaged. By engaging with the drain pipe joint 12, the protective member 150 is fitted to the tubular portion 13. The protective member 150 may be fixed to the tubular portion 13 with an adhesive or the like. Then, the ventilation valve 100 is fitted inside the inner cylinder wall portion 151 of the protective member 150 via the opening 151a. At this time, a part of the ventilation valve main body 110 is stably held in the accommodation space 151a by engaging the end surface of the connection port 110b of the ventilation valve main body 110 with the step on the inner surface of the inner cylinder wall portion 151. Then, when the water blocking member 118 is crushed, the ventilation valve 100 is attached to the protective member 150 in a sealed state.

As shown in FIG. 15, when drainage flows through the drainage pipe 11, sewage or dirt may enter the cylinder portion 13 side due to water splash or the like. In the vent valve device in which the vent valve 100 and the protective member 150 are connected, the louver portion 153 of the protective member 150 is arranged on the axially deep side of the tubular portion 13 with respect to the vent valve 100, so that the vent valve 100 is axially oriented. It covers from the deep side to protect the ventilation valve 100 from sewage flowing through the drain pipe 11. In particular, since the inclined blade body 153a of the louver portion 153 faces downward in the axial direction (deep side) and outward in the radial direction, it is effective to splash water toward the radial center portion of the tubular portion 13 or the ventilation valve 100. Can be trapped. Further, the buffer space 151b of the protective member 150 effectively prevents water and dirt that have passed through the louver portion 153 from reaching the ventilation valve 100 (or the accommodation space 151a) and adhering to the ventilation valve 100 (or the accommodation space 151a). Further, the inner blade body 153a is arranged so as to be separated from the drainage in the drain pipe 11 than the outer blade body 153a. As a result, the louver portion 153 prevents water splashes from entering the ventilation valve 100, and the blade body 153a is prevented from trapping dirt from the water splashes more than necessary.

As shown in FIG. 16, when the inside of the drain pipe 11 of the piping structure 10 is normal pressure or positive pressure, the valve body 120 of the ventilation valve 100 seals the ventilation port 110a, and the ventilation valve 100 puts the inside and outside of the drain pipe 11 inside and outside. The communication passage is blocked. As described above, in the closed state where the drain pipe 11 is not negative pressure, the urging force due to the magnetic force exceeds the force in the opening direction acting on the valve body 120, and the valve body 120 constantly closes the vent 110a. Further, in the piping structure 10, the malodor drifting from the downstream side of the drainage pipe 11 is prevented from leaking into the room, and the invasion of pests creeping up from the downstream side of the drainage pipe 11 is also prevented.

Then, when the negative pressure in the drain pipe 11 increases from the steady closed state, the valve body accommodating space 110c in the ventilation valve main body 110 communicating with the drain pipe 11 also becomes a negative pressure. As a result, a pressure difference is generated inside and outside the ventilation valve main body 110 via the valve body 120 (and the ventilation port 110a), and this pressure difference acts to move the valve body 120 in the opening direction. Then, when the force acting on the valve body 120 in the opening direction exceeds the repulsive force between the magnets 117b and 124a, the valve body 120 starts moving toward the opening position along the axial direction. As the valve body 120 moves, the valve body side magnet holding portion 124 moves closer to the main body side magnet holding portion 117 along the axial direction.

Then, as shown in FIG. 17, the valve body 120 reaches a sufficiently open open position, and the outside air is introduced into the drain pipe 11 through the vent 110a. FIG. 17 schematically shows the air flow in the outside air inflow with arrows. In the present embodiment, since the valve body 120 moves along the valve shaft 123 centered in the radial direction, an air introduction port is formed on the outer side in the radial direction. When the outside air is introduced, the air enters the inside of the ventilation valve main body 110 through the ventilation port 110a of the ventilation valve 100 and passes between the main body side holding surface 115 and the valve body side holding surface 122 inclined from the axial direction. It is introduced into the buffer space 151b of the protective member 150 so as to flow from the outside in the direction to the inside. Then, since the ventilation passage 153 formed between the blades 153a is inclined with respect to the axial direction so as to face outward in the radial direction on the upper side so as not to oppose the air flow, the outside air is introduced. It can be introduced efficiently. Further, since the packing 130 is attached to the ventilation valve main body 110 instead of the valve body 120, the valve body 120 becomes relatively lightweight. As a result, the operation of the valve body 120 becomes light, for example, the initial movement of the valve body 120 becomes faster, and the minute movement of the valve body 120 becomes possible. As a result, the negative pressure in the drain pipe 11 is more reliably and quickly eliminated.

When the negative pressure in the drain pipe 11 is eliminated, the force acting on the valve body 120 due to the negative pressure disappears, and the valve body 120 is shown by the repulsive force of the main body side magnet holding portion 117 and the valve body side magnet holding portion 124. It returns to the closed position indicated by 16.

FIG. 18 shows a piping structure 10'of another embodiment in which the ventilation valve device of the present embodiment is installed on a piping material having a tubular portion 13'having a second diameter. As shown in FIG. 18, the piping material of this embodiment is configured by connecting two drain pipes 11 in an L shape via a drain pipe joint 12 branched in three directions. The drain pipe joint 12 has three connection ports, two drain pipes 11 are linearly connected to two of the connection ports, and a vent valve device is installed at one connection port opened upward. There is.

As shown in FIG. 18, the outer cylinder wall portion 152 of the protective member 150 is connected to the cylinder portion 13'(having a second diameter) via the second connecting portion 152a. Specifically, in a state where the outer cylinder wall portion 152 is inserted into the cylinder portion 13', the lower end of the outer cylinder wall portion 152 engages with the stepped surface of the drainage pipe joint 12, so that the protective member 150 is cylinderd. It is fitted to the portion 13'. Depending on the length of the tubular portion 13', the flange 154a may be engaged with the upper end surface of the tubular portion 13'. Further, the protective member 150 may be fixed to the tubular portion 13'with an adhesive or the like. Then, similarly to the piping structure 10 of FIG. 15, the ventilation valve 100 is fitted inside the inner cylinder wall portion 151 of the protective member 150. That is, the vent valve device and the protective member 150 of the present embodiment are configured to be compatible with pipe material cylinders having two different diameters.

Hereinafter, the action and effect of the vent valve device and the protective member 150 according to the embodiment of the present invention will be described.

According to the vent valve device and the protective member 150 of the present embodiment, the louver portion 153 is arranged on the axial deep side of the tubular portion 13 with respect to the vent valve 100 or the accommodation space 151b, and the vent valve 100 is arranged from the axial deep side. By covering it, it is possible to effectively prevent water splash from the drainage in the drain pipe from adhering to the ventilation valve 100 (particularly the valve body 120). Further, the louver portion 153 is composed of a plurality of annular blade bodies 153a separated from each other in the radial direction. As a result, a ventilation passage 153c that allows the inflow of outside air from the ventilation valve 100 to the inside of the piping material is secured between the adjacent blades 153a, and it is possible to suppress a decrease in the inflow amount of outside air from the outside. In particular, since the ventilation passage 153a is an annular opening, outside air can be introduced evenly from all directions in the radial direction, so that the valve body 120 is inclined (deviation) to hinder the operation of the valve body 120. It is possible to eliminate the negative pressure inside the piping material without having to do so. Further, each blade body 153a is inclined with respect to the axial direction so that the outer peripheral side surface of the blade body 153a faces the deep side of the piping material and the adjacent blade bodies at least partially overlap in the axial direction. Have been placed. As a result, the blade body 153a effectively blocks the drainage that bounces inward from the radial side of the ventilation valve 100, and it is possible to prevent the drainage from being applied to the ventilation valve 120 beyond the louver portion 153 and the buffer space 151c. .. Further, the blade body 153a on the outer peripheral side is arranged on the deeper side in the axial direction than the blade body 153a on the inner peripheral side, and the center of the louver portion 153 is formed so as to be recessed. The part 153 itself is prevented from becoming unnecessarily dirty. Therefore, the vent valve device and the protective member 150 of the present embodiment can prevent dirt from adhering to the vent valve 100 without obstructing the inflow of outside air as much as possible.

[Modification example]
The present invention is not limited to the above-described embodiment, and various embodiments and modifications can be taken. Hereinafter, modifications of the present invention will be described. In each modification, the components having the last two digits in common among the components represented by the three digits have the same or similar characteristics unless otherwise explained, and some of the description thereof will be omitted.

(1) The shape of the louver portion of the present invention is not limited to the above embodiment. For example, in the protective member 250 of FIG. 19, the blade bodies 253a are arranged at the same positions in the axial direction, and all of the blade bodies 253a in the axial direction are polymerized (in the radial direction). Even in such an arrangement, the louver portion 253 can protect the vent valve from water splashes. That is, even in the protective member 250, the louver portion 253 protects the vent valve 200 from the deep side of the tubular portion, so that the same effect as that of the protective member 150 of the above embodiment can be exhibited.

(2) The shape of the protective member of the present invention is not limited to the above embodiment. The protective member 350 of FIG. 20 includes a cylinder wall portion 351 and a louver portion 353 formed inside the cylinder wall portion 351. The tubular wall portion 351 is configured to hold only the louver portion 353, and is not configured to hold the vent valve 300. That is, the protective member 350 does not have a storage space and a buffer space. The cylinder wall portion 351 is configured to be inserted into the cylinder portion 33 having a predetermined diameter of the piping material. The outer diameter of the cylinder wall portion 351 is set to be substantially equal to the inner diameter of the cylinder portion 33 of the piping material so that the cylinder wall portion 351 fits into the cylinder portion 33. A connecting portion 351d for connecting to the tubular portion 33 is defined on the outer surface of the tubular wall portion 351. Further, the form of the louver portion 353 is substantially the same as the form of the louver portion 153 described above. In the present embodiment, the protective member 350 is not provided with the accommodating space and the buffer space, but as shown in FIG. 21 described later, the protective member 350 and the vent valve 300 are installed in the piping material as a vent valve device. In the state, the protective member 350 is configured to secure at least the range of motion of the valve body 320 of the vent valve 300. That is, the protective member 350 separates the louver portion 353 from the vent valve 300 so that the valve body 320 does not interfere with the louver portion 353 when the valve body 320 is opened to the maximum extent. It is provided inside.

FIG. 21 shows a piping structure 30 in which the ventilation valve device (vent valve 300 and protective member 350) of the present embodiment is installed in the piping material. The piping material is composed of a drain pipe 31 and a drain pipe joint 32, and a tubular portion 33 is formed in the drain pipe joint 32. Further, the vent valve 300 has the same configuration as the vent valve 100 of one embodiment. As shown in FIG. 21, the cylinder wall portion 351 of the protective member 350 is connected to the cylinder portion 33 via the connecting portion 351d. Specifically, in a state where the cylinder wall portion 351 is inserted into the cylinder portion 33, the lower end of the cylinder wall portion 351 is engaged with the drain pipe joint 32, so that the protective member 350 fits into the cylinder portion 33. It is worn. Then, the ventilation valve 300 is directly fitted to the tubular portion 33 so as to be stacked on the upper end surface of the protective member 350. At this time, the vent valve 300 and the protective member 350 are integrally held inside the tubular portion 33 by engaging the end surface of the connection port 310b of the vent valve main body 310 with the upper end surface of the tubular wall portion 351. That is, even in the protective member 350 and the piping structure 30 of the present embodiment, the louver portion 353 protects the ventilation valve 300 from the deep side of the tubular portion 33, so that the protective member 150 and the piping structure 10 of the above embodiment can be used. It can exert the same effect.

(3) The form of the vent valve device of the present invention is not limited to the above embodiment. For example, in the vent valve device of FIG. 22, the vent valve 400 and the protective member 450 are integrally formed. As shown in FIG. 22, the peripheral wall 411 of the vent valve main body 410 and the tubular wall portion 451 of the protective member 450 are integrally formed. That is, even in the vent valve device, the louver portion 453 protects the valve body 420 of the vent valve 400 from the deep side of the cylinder portion, whereby the vent valve device (vent valve 100 and protection member 150) of the above embodiment. It can exert the same action and effect as.

(4) The form of the vent valve of the present invention is not limited to the above embodiment. For example, in the present embodiment, the valve body of the vent valve is urged in the closing direction by the repulsive force of the magnet, but the present invention is not limited to this. For example, the urging of the valve body may be performed by another mechanism such as a spring within the technical scope of the present invention.

(5) The form of the vent valve of the present invention is not limited to the above embodiment. For example, the vent valve of the present embodiment is configured as a circular opening provided with a vent at the center, but the present invention is not limited to the above embodiment. For example, the technical idea of the present invention can be adopted even for a vent valve having an annular (doughnut-shaped) shape of the vent and the valve body. That is, those skilled in the art can arbitrarily change or modify the configuration of the vent valve within the technical scope of the present invention.

The present invention is not limited to the above-described embodiments and modifications, and can be implemented in various embodiments as long as it belongs to the technical scope of the present invention. That is, within the technical scope of the present invention, some configurations of the present embodiment may be omitted or modified, or other configurations may be added.

10 Piping structure 11 Drainage pipe (piping material)
12 Drainage pipe joint (piping material)
13 Cylinder 100 Vent valve 110 Vent valve main body 110a Vent 110b Connection port 110c Valve body accommodation space 111 Peripheral wall 112 Upper wall 113 Standing wall 115 Main body side holding surface 115a Protruding part 117 Main body side magnet holding part 117a Shaft hole 117b Main body side magnet 118 Water stop member 120 Valve body 121 Valve body body 122 Valve body side holding surface 123 Valve shaft 124 Valve body side magnet holding part 124a Valve body side magnet 130 Packing 131 Sealing part 138 Fixing part 140 Cover body 141 Connecting hole 142 Notch part 150 Protection Member 151 Inner cylinder wall part (tube wall part)
151a Opening 151b Accommodation space 151c Buffer space 151d First connection 152 Outer cylinder wall 152a Second connection 153 Louver 153a Blade 153b Bar material 153c Ventilation 153d Central opening 154 Top wall 154a Flange 155 Rib

Claims (8)

A protective member for a ventilation valve that protects the ventilation valve from the axially deep side of the cylinder in a piping material having a ventilation cylinder to which the ventilation valve main body of the ventilation valve is mounted.
A louver portion is provided which is arranged on the axially deep side of the cylinder portion with respect to the vent valve so as to cover the vent valve at least partially from the axial deep side.
The louver portion includes a plurality of annular blades arranged concentrically apart from each other, and a ventilation path that allows air to flow from the ventilation valve to the piping material between adjacent blades. A protective member characterized in that Each of the blades is inclined so that the inner peripheral end is located on the deeper side in the axial direction than the outer peripheral end with respect to the axial direction, and a part or all of the adjacent blades in the axial direction are overlapped. The protective member according to claim 1. The protective member according to claim 2, wherein in the plurality of blades, the outer peripheral side blades are arranged on the axially deeper side than the inner peripheral side blades. The invention according to any one of claims 1 to 3, further comprising a tubular wall portion that is inserted into the tubular portion and further forms an accommodating space for accommodating at least a part of the vent valve. Protective member. Any of claims 1 to 4, further comprising a plurality of connecting portions each having a different diameter so that a plurality of types of piping materials having different diameters can be connected by extrapolation or interpolation. The protective member according to item 1. A vent valve device installed in the cylinder of piping material.
It has a vent that communicates the inside and outside of the piping material, and has a vent valve body that is attached to the cylinder and a valve body that is movably supported by the vent valve body so that the vent can be opened and closed. Ventilation valve and
A vent valve device comprising the protective member according to any one of claims 1 to 5, which protects the vent valve from the axially deep side of the tubular portion. The vent valve device according to claim 6, wherein the protective member is separate from the vent valve main body and is selectively attached to the tubular portion. Two or more drainage pipes and
It has three or more connection ports, connects the two or more drainage pipes through a part of the connection ports of the plurality of connection ports, and connects the two or more drainage pipes to at least one of the plurality of connection ports for ventilation. Drainage pipe joints with defined cylinders and
Ventilation having a vent that communicates with the inside and outside of the drain pipe, a vent valve body installed in the cylinder, and a valve body that is movably supported by the vent valve body so that the vent can be opened and closed. With a valve
A piping structure comprising the protective member according to any one of claims 1 to 5, which is installed in the tubular portion so as to protect the vent valve from the axially deep side of the tubular portion. ..

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