JPH08105088A - Drainage horizontal main pipe offset upper joint - Google Patents

Abstract

PURPOSE: To make stable draining work achievable in reducing a variation in pipe inner pressure without any air vent piping by connecting a bent pipe curved at the specified angle to both riser upper and lower ends of the drain piping of a multistory building or midway and/or the lower end of a lowermost layer manifold via a bend or the like, and installing a drainage swirl vane on the inner surface. CONSTITUTION: A joint 1 is formed into a bent pipe curved at 45 or 90 degrees. When drainage is poured into this joint 1 from an upper drainage horizontal main pipe 2, it is drifted toward a joint side wall by dint of a drainage swirl vane 8. Simultaneously it imparts its swirling force in the arrow direction. Then it flows down as swirling along the inner wall surface of a lower layer riser 3 from a riser part of the joint 1. Therefore a rebound of the drainage is solved, thereby securing a ventilating space upward the drainage swirling vane 8. With this constitution, an air core to be interconnected to each central part of a drain riser and a manifold is formed there, and thereby an upturn of air pressure in the piping is solved as well, and such stable drainage as being small in pressure variations is thus performed. With this constitution, such a possibility that the drainage might be collected in the horizontal main pipe 2 and an upper pipe bottom 1B is thus preventable.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drainage horizontal main pipe offset upper joint in a drainage pipe provided in a multi-layer building.

[0002]

2. Description of the Related Art Generally, as shown in FIG. 4, a drainage pipe provided in a multi-layer building has a horizontal branch pipe 12 connected to a drainage device 11 such as a toilet bowl of each floor, and each horizontal branch pipe 12 , A drainage pipe 14 that connects the collecting pipes 13 of each layer to form a straight line, and a collecting pipe 13 of the lowest layer
(Or the standing pipe 14) The drainage horizontal main pipe 16 is connected to the lower end through the leg bent pipe 15 and the like to form a one-pipe system and is discharged through the chamber 17.

Conventionally, in the case where the first floor of a building is a garage, the horizontal drainage pipe 16 connects the 45-degree bend pipes 18 and 19 to the vertical offset portion 20 as shown in FIG.
As shown in FIG. 5, the 90-degree bent tubes 21 and 22 and the lower standing tube 23 are connected to each other in the vertical direction.
In some cases, the offset section 24 having a height of about a floor is provided.

However, when the offset portion 20 is arranged on the horizontal drainage pipe 16 as shown in FIG. 4, when the drainage flow rate is large,
There is a case where the curved pipes 18 and 19 are filled with drainage, air is trapped in the upper portion of the upper curved pipe 18 and its pressure rises, and the material is splashed from the drainage device 11. Further, as shown in FIG. 5, when the offset horizontal portion main pipe 16 is provided with the offset portion 24, when the offset horizontal pulling length (L) is short, when the drainage flow rate is large, as shown in FIG. Since the wastewater (W) flows down over the entire cross section of the pipe, the wastewater flow sucks the air in the upper pipe from the upper curved pipe 21, and the airflow is blocked by the splash of the wastewater as shown in FIG. There will be problems such as destruction of the sealing water trap on the first floor.

Therefore, the offset portion 2 of the horizontal drainage pipe 16
The above problem is solved by providing an air vent pipe 25 (see FIG. 5) that bypasses the upstream side and the downstream side of 0 and 24.

[0006]

By the way, in the above-mentioned prior art, as described above, the air vent pipes bypassing the upstream side and the downstream side of the offset portions 20 and 24 are indispensable, and there is a problem that the piping becomes complicated. is there. The present invention has been made in view of the actual situation as described above, and the purpose thereof is to eliminate the need for air vent pipes and to realize a swirl flow in the offset portion pipe even when the drainage flow rate is large, thereby reducing the pipe air pressure. (EN) It is an object to provide a drainage horizontal main pipe offset upper joint that can be obtained at a low cost with a structure that can prevent rising.

[0007]

In order to achieve the above object, the present invention takes the following technical means. That is, the present invention is an offset upper joint of a drainage horizontal main pipe, which is connected via a curved pipe or the like to the upper and lower ends of the drainage pipe of a multi-layer building, or to the lower end of the middle or lowermost layer collecting pipe, 4 joints
It is composed of a bent pipe bent at 5 or 90 degrees, and a drain swirl vane is arranged on the inner surface of the inner curved wall of the joint.

Further, the present invention is characterized in that the drainage swirl vanes are provided so as to avoid the center line of the upper pipe bottom of the joint.

[0009]

According to the present invention, even when the drainage flow rate is large, the drainage flowing from the drainage horizontal main pipe or the like into the offset upper joint is
A draining swirl vane provided in the joint gives a swirling force and flows down while swirling along the inner wall of the joint and the lower standing pipe or the inner wall of the lower offset joint, weakening the suction force of the upper air and A ventilation space (air core) is formed in a communicating manner. Therefore, the rise in the air pressure in the pipe is eliminated, stable drainage with a small pressure fluctuation is performed, and breakage of the sealed water can be prevented.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 3 show an offset upper joint 1 of the present invention,
It is composed of a 90-degree bent pipe connecting the upper drain horizontal main pipe 2 and the lower layer standing pipe 3, and connection flanges 6 and 7 are provided on the outer circumferences of the receiving ports 4 and 5 at both ends. The drain swirl vane 8 is arranged on the inner surface of the inner curved wall 1A of the joint 1 at an angle (θ) with respect to the pipe axis (C) and at a position avoiding the center line of the upper pipe bottom 1B. The drainage main pipe 2 and the upper pipe bottom 1B in the joint 1 are prevented from collecting drainage.

In the above embodiment, the drainage flowing from the drainage horizontal main pipe 2 into the offset upper joint 1 is deflected in the direction of the joint side wall by the swirl vanes, and a swirl force is applied in the direction shown by the arrow in FIG. It flows down while swirling along the inner wall surface of the lower layer standing pipe 3 from the standing pipe portion (lower part) of the joint 1. Therefore, the splashing of drainage in the joint 1 is eliminated, a ventilation space is secured above the draining swirl vanes 8, and an air core communicating with the center of the drainage standing pipe and the collecting pipe is formed, so that the air pressure in the pipe increases. Is eliminated, and stable drainage with small pressure fluctuation is performed.

The size, shape, and inclination angle (θ) of the swirl vane 8 in the present invention are properly designed in accordance with the inner diameter of the drainage vertical pipe, the maximum flow rate, and the installation position. The present invention is not limited to the above-mentioned embodiment, and is, for example, 45
It can also be used for offset upper joints consisting of curved pipes.

[0013]

INDUSTRIAL APPLICABILITY As described above, according to the present invention, the offset of the horizontal drain main pipe connected to the upper and lower ends of the drain pipe of the multi-layer building or the lower end of the vertical or middle or lowermost collecting pipe through a curved pipe or the like. An upper joint, which is composed of a bent pipe bent at 45 or 90 degrees, and is characterized in that a drainage swirl vane is arranged on the inner surface of the inner curved wall of the joint. Is unnecessary, stable increase of the air pressure in the pipe can be prevented even when the flow rate of drainage is high, and the structure is simple and inexpensive, and the piping can be simplified.

Further, the present invention is characterized in that the drain swirl vanes are provided so as to avoid the center line of the upper pipe bottom of the joint, so that drainage is discharged not only in the upper pipe bottom in the joint but also in the drainage horizontal main pipe. It can prevent accumulation.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is a right side view of FIG.

FIG. 4 is a schematic front view showing a general example of the entire drainage pipe.

FIG. 5 is a front view showing a conventional drainage horizontal main pipe offset structure.

FIG. 6 is an explanatory diagram of a drainage flow condition in an offset upper joint of a conventional example.

FIG. 7 is an explanatory diagram of a drainage flow condition in an offset upper joint of a conventional example.

[Explanation of symbols]

 1 Offset upper joint 1A Inner curved wall 1B Upper pipe bottom 2 Upper drain horizontal main pipe 3 Lower standing pipe 8 Drain swirl vanes

Claims (2)

[Claims] 1. An offset upper joint for a drainage horizontal main pipe, which is connected to the upper and lower ends of a drainage pipe of a multi-layer building, or to the lower end of a middle or lowermost collecting pipe through a curved pipe or the like. Is a horizontal drain pipe offset upper joint, which is composed of a bent pipe bent at 45 or 90 degrees, and is provided with a drain swirl vane on the inner surface of the inner curved wall of the joint. 2. The drainage horizontal main pipe offset upper joint according to claim 1, wherein the drainage swirl vanes are provided so as to avoid the centerline of the upper pipe bottom of the joint.