JP6789103B2 - Piping fittings and drainage system - Google Patents

Description

The present invention relates to pipe fittings and drainage systems.

Conventionally, as a pressure relaxation device for releasing pressure in a pipe, a drainage structure provided with an expansion / contraction chamber that expands / contracts by air pressure is known (see Patent Document 1). This expansion / contraction chamber is attached to the tip of a branch pipe portion that is inclinedly connected to the main pipe portion (drainage pipe).

Japanese Unexamined Patent Publication No. 2011-169081

However, if the branch pipe portion is connected to the main pipe portion as in the above-mentioned conventional example, the flow path resistance is increased, which is considered to affect the inflow and outflow of air to the pressure relaxation device. On the other hand, when the branch pipe portion and the main pipe portion are made into circular pipes, the opening shape of the branch pipe portion with respect to the main pipe portion has a shape having a square portion. When the drainage flowing through the main pipe hits the angular portion, it repels inside the branch pipe portion, and the drainage tends to stay at the connection portion between the branch pipe portion and the main pipe portion. In addition, dust contained in the wastewater adheres to this angular portion and easily stays there. When such retention occurs, it is considered that it affects the inflow and outflow of air to the pressure relaxation device.

An object of the present invention is to suppress the accumulation of drainage and drainage dust at the connection portion between the branch pipe portion and the main pipe portion.

The piping joint according to claim 1 has a main portion connected to a drain pipe for flowing drainage from a water supply device and an oval cross section in the radial direction, and the cylindrical portion of the main portion has a cylindrical portion. It has a branch pipe portion connected obliquely with respect to the axial direction, and the branch pipe portion is connected to the main portion in a state where the longitudinal direction of the radial cross section is directed to the axial direction of the cylindrical portion. is, the lateral direction of the width of the branch pipe part, the rather smaller than the inner diameter of the cylindrical portion, the opening of the branch pipe portion to the cylindrical portion is elongated in the axial direction of the cylindrical portion.

In this pipe joint, the radial cross section of the branch pipe portion is formed in an oval shape, and the cylindrical portion of the main pipe portion is in a state where the longitudinal direction of the radial cross section is directed to the axial direction of the cylindrical portion. It is connected to the. The lateral direction of the width of the branch pipe portion, rather smaller than the inner diameter of the cylindrical portion, the opening of the branch pipe portion to the cylindrical portion are the vertical to the axial direction of the cylindrical portion, have a portion with openings angular It will be a shape that does not. Therefore, it is possible to prevent the drainage flowing through the main pipe from repelling at the connection portion between the branch pipe portion and the main pipe portion, and the dust contained in the drainage from adhering to the connection portion.

According to the second aspect of the present invention, in the pipe joint according to the first aspect, a funnel portion whose diameter is gradually increased is provided at an end portion of the branch pipe portion on the side opposite to the main portion side.

In this pipe joint, a funnel that gradually expands in diameter is provided at the end of the branch pipe on the opposite side of the main pipe, so if foreign matter is mixed in the drainage that has flowed into the branch pipe. However, the foreign matter is unlikely to be caught on the wall surface of the branch pipe portion, and is smoothly discharged toward the main pipe portion.

The drainage system according to claim 3 has a drainage pipe that allows drainage from a water supply device to flow downward, a horizontal pulling pipe that allows drainage from the drainage pipe to flow laterally, and a drainage pipe that allows drainage from the horizontal pulling pipe to flow downward. It has a vertical pipe, a pressure relieving device for relieving the pressure acting on the drainage pipe, and the piping joint according to claim 1 or 2, which connects the pressure relieving device to the drainage pipe.

In this drainage system, the pressure (positive pressure) generated in the drainage pipe during drainage is absorbed by the pressure relaxation device connected to the branch pipe portion of the pipe joint. Therefore, as compared with the case where the pressure remains in the pipe such as the horizontal pulling pipe, it is possible to suppress the blowing out of the sealing water and the generation of odor when a plurality of instruments are merged.

In addition, it is possible to suppress the retention of drainage and drainage dust at the connection portion between the branch pipe portion and the main pipe portion in the pipe joint.

According to the pipe joint and the drainage system according to the present invention, it is possible to suppress the accumulation of drainage and drainage dust at the connection portion between the branch pipe portion and the main pipe portion.

It is a vertical cross-sectional view which shows the outline of the drainage system which concerns on this embodiment. (A) is a vertical sectional view showing a pressure relaxation device according to the present embodiment. (B) is an enlarged cross-sectional view taken along the line 2B-2B in FIG. 2 (A). (A) is a perspective view which shows the piping joint which concerns on this embodiment. FIG. 3B is a cross-sectional view taken along the line 3B-3B in FIG. 3A showing the cross-sectional shape of the branch pipe portion. It is a perspective view which shows the piping joint which concerns on this embodiment.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

(Drainage system)
In FIG. 1, the drainage system 10 according to the present embodiment includes, for example, a siphon drainage structure. The drainage vertical pipe 16 penetrating the through hole 14 of the floor slab 12 of the building is provided with a drainage joint 18 for connecting the pipes from the water supply equipment, and drainage from the upper drainage vertical pipe 16 and the water supply equipment. It is configured to merge with the wastewater from. It should be noted that in FIG. 1, the configuration of the connecting portion of each pipe is appropriately omitted.

On each floor, a kitchen sink 19 and a dishwasher 20 (only a part of which is shown) are installed as water-related appliances. The kitchen sink 19 and the dishwasher 20 are provided with drain ports 22 and 24 through which drainage flows, respectively. The drain port 22 of the kitchen sink 19 communicates with a water-sealed drain trap 26 for preventing backflow of odors and gases, and the drain trap 26 is composed of a so-called bowl trap. The dishwasher 20 is provided with a check valve including an electromagnetic valve having a check check function, and is configured to prevent backflow of odor, gas, and the like. The check valve of the dishwasher 20 may be replaced with a water-sealed trap.

At the bottom of the drain trap 26 on the kitchen sink 19 side, a connecting pipe 30 communicating with the drain trap 26 is provided, and the connecting pipe 30 extends downward from the drain trap 26 and drains the drain from the drain trap 26 downward. A drainage pipe 32 for flowing is connected. Further, a drain pipe 34 for flowing the drainage below the drain pipe 32 is connected to the downstream side of the drain port 24 of the dishwasher 20.

An S-shaped drain trap 31 is provided in the drain pipe 32 on the kitchen sink 19 side. The drain trap 31 is provided with a ventilation valve 36. The ventilation valve 36 is a component for allowing air from the outside to pass through the drain pipe 32 and preventing drainage and air from passing from the drain pipe 32 to the outside. Further, a pipe joint 38 is provided on the downstream side of the ventilation valve 36. The pipe joint 38 is a member that connects the pressure relaxation device 40 to the drain pipe 32. The main pipe 41 in the pipe joint 38 is connected to the drain pipe 32. A pressure relaxation device 40 is provided at the end of the branch pipe portion 42 in the pipe joint 38. The pressure relaxation device 40 is a component for relaxing the pressure acting on the drain pipe 32. A merging pipe 43 is provided on the downstream side of the pipe joint 38, and the drain pipe 32 on the kitchen sink 19 side and the drain pipe 34 on the dishwasher 20 side are joined by the merging pipe 43.

The drainage system 10 according to the present embodiment includes a drainage pipe 32, a horizontal pulling pipe 46, a vertical pipe 48, a pressure relaxation device 40, and a pipe joint 38. The siphon drainage pipe 44 is mainly composed of a drainage pipe 32, a horizontal pulling pipe 46, and a vertical pipe 48.

As described above, the drain pipe 32 is a pipe that allows drainage from water-related appliances such as the kitchen sink 19 and the dishwasher 20 to flow downward. The horizontal pulling pipe 46 is a pipe that allows drainage from the drainage pipe 32 to flow in the lateral direction. The vertical pipe 48 is a pipe for flowing the drainage from the horizontal pulling pipe 46 downward, and is connected to the drainage stand pipe 16 via the drainage joint 18.

In the siphon drainage pipe 44, a siphon force is generated by causing the drainage flowing from the horizontal pulling pipe 46 to the vertical pipe 48 to flow downward. The siphon force in the discharge direction acts on the drainage in the horizontal pull pipe 46, the drain pipe 32, and the confluence pipe 43 by being pulled by the siphon force generated in the vertical pipe 48. When a positive pressure is generated in the siphon drain pipe 44, the positive pressure can be relaxed by the pressure relaxation device 40.

Here, the mechanism by which positive pressure is generated in the drain pipe 32 will be described. When there is a drainage pool from the water supply device, the drainage flows downward through the drainage traps 26 and 31 in a full flow state. At this time, since the air in the drain pipe 32 is pressed by the drainage, the inside of the drain pipe 32 is in a positive pressure state. Further, in the siphon drainage structure, the inner diameter of the siphon drainage pipe 44 is set to be smaller than the inner diameter of the conventional gradient drainage pipe in order to easily cause the siphon drainage pipe 44 to be in a full flow state, so that drainage is relatively difficult to flow. .. Therefore, in the drainage system 10 having a siphon drainage structure, the inside of the drainage pipe 32 tends to be in a positive pressure state at the time of drainage. In addition, in order to alleviate the positive pressure state in the drain pipe 32, if the drainage flows into the dishwasher 20 side through the confluence pipe 43 and the drain pipe 34, there is a possibility that the drainage port 24 of the dishwasher 20 ejects. ..

FIG. 2A shows a cross-sectional shape in which the pressure relaxation device 40 is connected to the pipe joint 38. As shown in FIGS. 2A and 2B, the pressure relaxation device 40 includes a bag body 50 connected to the pipe joint 38 and a cover 52 covering the bag body 50.

The bag body 50 is connected to the drain pipe 32 of the water supply device, and is configured to receive the pressure from the drain pipe 32 from the inside of the lower part. As shown in FIGS. 5 and 6, the bag body 50 is formed of a cylindrical rubber member having one end closed.

In the present embodiment, the case where the bag body 50 is made of rubber will be described as an example, but the bag body 50 may be a member having deformable elasticity. As the material, an elastomer other than resin or rubber can be used.

The end of the branch pipe portion 42 in the pipe joint 38 is a large-diameter cylindrical mounting portion 62, and the end face corner portion of the mounting portion 62 constitutes a tapered tapered surface 62A. The bag body 50 and the cover 52 are attached to the attachment portion 62. A male screw portion 62B for mounting is formed on the outer circumference of the mounting portion 62.

The cover 52 includes a cylindrical cover main body 64 and a top surface 64A that closes the upper portion of the cover main body 64. A large diameter portion 64B is formed at the lower end portion of the cover main body 64, and a female screw portion 64C for mounting is formed on the inner peripheral surface of the large diameter portion 64B. As a result, by rotating the large diameter portion 64B of the cover body 64 in accordance with the mounting portion 62 of the pipe joint 38, the female screw portion 64C for mounting on the inner surface of the large diameter portion 64B becomes the male screw portion 62B for mounting of the mounting portion 62. The cover 52 is configured to be attached to the pipe joint 38 by being screwed into the pipe joint 38. In this mounting state, a facing surface 64D facing the tapered surface 62A of the mounting portion 62 is formed on the inner surface of the large diameter portion 64B of the cover 52.

The top surface 64A is formed in a disk shape. A plurality of arc-shaped ventilation holes 64E centered on the central portion are formed on the top surface 64A. As a result, the change in the internal pressure inside the cover 52 can be suppressed.

The bag body 50 is housed in the cover 52. The base end portion of the bag body 50 is sandwiched between the tapered surface 62A and the facing surface 64D inside the cover 52, and is configured to be in close contact with the tapered surface 62A. As a result, watertightness with the outside is ensured in a state where the inside of the bag body 50 and the pipe joint 38 communicate with each other. Further, the bag body 50 is maintained in an independent state. The self-supporting state means a state in which the maximum height of the bag body 50 is maintained under normal pressure.

As shown in FIG. 2B, the bag body 50 is formed in a shape that curves outward from the central portion in a plan view. This shape can be rephrased as a shape that is convexly curved and extended to one side in the circumferential direction or a propeller shape. The bag body 50 can be elastically expanded and contracted in the lateral direction (outward in the radial direction of the cover 52), and when it receives a positive pressure from the drain pipe 32, it elastically deforms and swells in the lateral direction to form the drain pipe 32. It is configured to relieve the pressure generated.

(Piping fitting)
In FIG. 3A, the pipe joint 38 has, for example, a main pipe portion 41 and a branch pipe portion 42 integrally.

The main pipe portion 41 is a portion connected to a drain pipe 32 through which drainage from a water supply device flows. The main pipe portion 41 is, for example, a cylindrical straight pipe having a circular cross section, and substantially the entire main pipe portion 41 is a cylindrical portion 41A. The pipe joint 38 is installed so that the axial direction L1 of the main pipe portion 41 is in the vertical direction and the tip of the branch pipe portion 42 opens upward. A funnel portion 42A whose diameter is gradually increased is provided at the tip of the branch pipe portion 42, specifically, the end portion on the side opposite to the main pipe portion 41 side. The funnel portion 42A is provided on a large-diameter cylindrical mounting portion 62.

As shown in FIG. 1, the upper end of the main pipe 41 is connected to the drain pipe 32. As shown in FIGS. 2 (A) and 3 (A), a large diameter portion 54 is formed in the lower part of the main pipe portion 41, and a male screw portion 54A is formed on the outer periphery of the large diameter portion 54. Has been done. By using the male screw portion 54A, the merging pipe 43 can be connected to the lower part of the main pipe portion 41 (FIG. 1).

As shown in FIGS. 3A and 3B, the branch pipe portion 42 has an oval cross section in the radial direction, and the cylindrical portion 41A of the main pipe portion 41 has an axial L1 of the cylindrical portion 41A. It is connected diagonally to. The inclination angle θ of the branch pipe portion 42 in the axial direction L2 with respect to the axial direction L1 of the cylindrical portion 41A is, for example, 30 to 60 °, more preferably 45 °. The "oval" is an oval, an ellipse, an oval or a closed curve similar thereto, and the radial cross section of the oval has a longitudinal direction 42L and a lateral direction 42S substantially orthogonal to each other.

The branch pipe portion 42 is connected to the main pipe portion 41 in a state where the longitudinal direction 42L of the radial cross section is directed to the axial direction L1 of the cylindrical portion 41A. In other words, the longitudinal direction 42L of the branch pipe portion 42 is directed in the vertical direction of the drainage system 10, and the branch pipe portion 42 is arranged vertically.

The lateral side 42S of the radial cross section of the branch pipe portion 42 is in a state of facing the radial direction of the cylindrical portion 41A. The width D2 of the branch pipe portion 42 in the lateral direction 42S is smaller than the inner diameter D1 (FIG. 4) of the cylindrical portion 41A of the main pipe portion 41. By setting the inner diameter in this way, as shown in FIG. 4, the opening 56 of the branch pipe portion 42 with respect to the cylindrical portion 41A has a shape that is long in the axial direction L1 of the cylindrical portion 41A and does not have a square portion. ing.

(Action)
The present embodiment is configured as described above, and its operation will be described below. In FIG. 1, in the drainage system 10 according to the present embodiment, the pressure (positive pressure) generated in the drainage pipe 32 during drainage is absorbed by the pressure relaxation device 40 connected to the branch pipe portion 42 of the pipe joint 38. .. Therefore, as compared with the case where the pressure remains in the pipe such as the horizontal pulling pipe 46, it is possible to suppress the blowing out of the sealing water and the generation of odor when a plurality of instruments are merged.

Further, in the pipe joint 38, the radial cross section of the branch pipe portion 42 is formed in an oval shape, and the branch pipe portion 42 faces the longitudinal direction 42L of the radial cross section toward the axial direction L1 of the cylindrical portion 41A. , It is connected to the cylindrical portion 41A of the main portion 41. Since the width D2 of the branch pipe portion 42 in the lateral direction 42S is smaller than the inner diameter D1 of the cylindrical portion 41A, the opening 56 of the branch pipe portion 42 with respect to the main pipe portion 41 has a shape that does not have a square portion.

Therefore, it is possible to prevent the drainage flowing through the main pipe portion 41 from repelling at the connection portion between the branch pipe portion 42 and the main pipe portion 41, and the dust contained in the drainage from adhering to the connection portion. Therefore, it is possible to suppress the accumulation of drainage and drainage dust at the connection portion between the branch pipe portion 42 and the main pipe portion 41. Further, this makes it possible for the pressure relaxation device 40 connected to the branch pipe portion 42 to function normally. Further, in the pressure relaxation device 40, it is possible to suppress the retention of wastewater dust flowing in together with the inflowing air. In particular, in a siphon drainage system, drainage is relatively difficult to flow until the siphon force is exerted, and drainage dust and the like are likely to stay at the connection portion. Therefore, this embodiment is suitable for a siphon drainage system.

Further, since the funnel portion 42A whose diameter is gradually increased is provided at the end of the branch pipe portion 42 opposite to the main pipe portion 41 side, foreign matter is mixed in the drainage flowing into the branch pipe portion 42. Even if it is present, the foreign matter is unlikely to be caught on the wall surface of the branch pipe portion 42, and is smoothly discharged toward the main pipe portion 41.

[Other Embodiments]

Although an example of the embodiment of the present invention has been described above, the embodiment of the present invention is not limited to the above, and other than the above, various modifications can be made within a range not deviating from the gist thereof. Of course there is.

For example, although the drainage system 10 in the present embodiment is a siphon drainage system, it can also be applied to a conventional drainage system in which the horizontal pulling pipe is a gradient pipe.

Further, although it is assumed that the funnel portion 42A having a gradually increasing diameter is provided at the end portion of the branch pipe portion 42 opposite to the main pipe portion 41 side, the structure may not have the funnel portion 42A.

10 ... Drainage system, 19 ... Kitchen sink (water supply), 32 ... Drainage pipe, 38 ... Piping joint, 40 ... Pressure relief device, 41 ... Main part, 41A ... Cylindrical part, 42 ... Branch pipe part, 42A ... Funnel part, 42L ... Longitudinal direction, 42S ... Short direction, 46 ... Horizontal pipe, 48 ... Vertical pipe, D1 ... Cylindrical inner diameter, D2 ... Branch pipe width in short side, L1 ... Axial direction

Claims (3)

The main part connected to the drain pipe that drains the drainage from the water supply equipment,
The radial cross section is formed in an oval shape, and the cylindrical portion of the main pipe portion has a branch pipe portion connected obliquely to the axial direction of the cylindrical portion.
The branch pipe portion is connected to the main pipe portion with the longitudinal direction of the radial cross section oriented in the axial direction of the cylindrical portion.
The lateral direction of the width of the branch pipe part, rather smaller than the inner diameter of said cylindrical portion,
The opening of the branch pipe portion with respect to the cylindrical portion is a pipe joint that is vertically elongated in the axial direction of the cylindrical portion . The pipe joint according to claim 1, wherein a funnel portion whose diameter is gradually increased is provided at an end portion of the branch pipe portion on the side opposite to the main pipe portion side. A drainage pipe that drains the drainage from the water supply equipment downward,
A horizontal pulling pipe that allows drainage from the drainage pipe to flow in the lateral direction,
A vertical pipe that allows drainage from the horizontal pulling pipe to flow downward,
A pressure relaxation device for relieving the pressure acting on the drain pipe,
The pipe joint according to claim 1 or 2, which connects the pressure relaxation device to the drainage pipe.
Drainage system with.