JPH08105087A - Offset joint of draining horizontal main pipe - Google Patents

Abstract

PURPOSE: To aim at the promotion of simplification, miniaturization of structure as well as a reduction in a piping space by offsetting a horizontal main pipe to be connected to both riser up and down ends or in the middle of drain piping or lower end of the lowermost layer pipe, as making the upward pipe opening center to be horizontally with the downward pipe opening center looking from both plane and side faces. CONSTITUTION: A joint 1 is formed into a bend pipe form at 90 degrees in front view. Next, an upper pipe opening center C1 is offset to a lower pipe opening center C2 in the horizontal direction. When drainage is poured into the joint 1 from the horizontal main pipe 6, it hits on an upper inner wall of this joint 1 and it changes its direction offset H and downward, thereby imparting its turning force. Successively, it flows down as turning along a riser inner wall surface from the lower inner wall surface. Therefore it does not flow on the whole section of a riser 7, so any ventilation blockade is hard to occur. In succession, an air core to be interconnected to a manifold center and the riser 7 is formed, and it is flowing down as turning, so that any upper air suction is weakened, therefore stable draining takes place. With this constitution, it is adoptable irrespective of both vertical and horizontal sizes in the offset part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an offset joint for a drainage horizontal main pipe 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.
In addition, as shown in FIG. 5, when the 90-degree curved pipes 21 and 22 and the lower riser pipe 23 are connected to each other, an offset portion 24 having a height of about one floor in the vertical direction may be provided. is there.

However, as shown in FIG. 4, the drainage horizontal main pipe 1
When the offset portion 20 is arranged at 6, when the drainage flow rate is large, the drainage in the curved pipes 18 and 19 is filled, and air is trapped in the upper portion of the upper curved pipe 18 to increase its pressure.
The material of the drainage device 11 may pop out. Also, FIG.
As shown in FIG. 6, when the offset horizontal portion main pipe 16 is provided with the offset portion 24, when the offset horizontal pulling length L is short and the drainage flow rate is large, the inside of the lower layer vertical pipe 23 is drained W as shown in FIG.
Flows down the entire cross section of the pipe, so the drainage flow is the upper curved pipe 2
1, the air in the pipe above is sucked, and as shown in FIG. 7, the air flow is blocked by the splash of the drainage, which causes a problem such as the breakage of the sealed water trap of the lower floor.

Therefore, as shown in FIG. 5, an air vent pipe 25 that bypasses the upstream side and the downstream side of the offset portion 24 of the drainage horizontal main pipe 16 is provided to solve the above problem. However, the provision of the air vent pipe 25 causes the pipe to be complicated. The applicant of the present application has already proposed an offset structure without air venting pipes, which prevents an increase in the air pressure in the pipes even when the drainage flow rate is large, and enables stable drainage. (See Japanese Utility Model Publication No. 4-126968).
That is, as shown in FIG. 8, this offset structure has a structure in which the lower horizontal main pipe 1 is provided with respect to the upper horizontal main pipe 16A of the offset portion 20.
6B is vertically and horizontally offset via curved pipes 26 and 27.

[0006]

By the way, in the offset structure shown in FIG. 8, the drainage horizontal main pipe 16 connected to the lower end of the drainage vertical pipe 14 or the lower end of the lowest layer collecting pipe 13 via the leg bent pipe 15 is Although the effect is recognized, it cannot be used as a joint in the offset portion 24 shown in FIG. 5, and there is a drawback that the offset joint is large and the piping space is large.

The present invention has been made in view of the above-mentioned circumstances, and the object thereof is to be adopted for the offset upper portion regardless of the vertical dimension or the lateral pulling dimension of the offset portion. Another object of the present invention is to provide an offset joint for a horizontal drainage pipe, which has a simple structure and can be downsized and the piping space can be reduced.

[0008]

In order to achieve the above object, the present invention takes the following technical means. That is, the present invention is an offset joint for a drainage horizontal main pipe, which is connected to the upper and lower ends of a drainage pipe of a multi-layered building or to the lower end of a middle pipe or a lowermost pipe of a lowermost layer by a curved pipe or the like. Is a 90-degree curved tube when viewed from the front, and is characterized in that the center of the upper tube opening is horizontally offset from the center of the lower tube opening when viewed from the plane and the side surface.

[0009]

According to the present invention, the drainage flowing into the upper offset joint through the drainage horizontal main pipe flows down while swirling along the joint inner wall which is vertically and horizontally offset, and along the inner wall of the downstream side pipe. Since it flows down while swirling, an air core that communicates with the center of the drainage vertical pipe and the collecting pipe is also formed in the offset joint. Therefore, even when there is a large amount of drainage, the drainage flowing from the upper offset joint to the lower layer vertical pipe does not flow in the entire cross section of the pipe, so it does not suck in the upper air, and the drainage bounces back inside the upper offset joint, Without blocking the flow, the rise of the air pressure in the pipe is eliminated, and stable drainage with a small pressure fluctuation is performed.

Also, when the offset joint of the present invention is connected to the lower end of the drainage standing pipe or the lower end of the lowermost layer collecting pipe through a curved pipe or the like, the drainage flows while swirling along the inner wall of the offset joint. The air is not confined in the offset joint, the air core communicating with the center of the drainage vertical pipe and the collecting pipe is formed, and stable drainage with small pressure fluctuation is performed.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 3 show an embodiment of the present invention, which is used for the upper offset joint 1 when the height 24 of the offset portion is large (see FIG. 5). As shown in FIG. 3, the offset joint 1 has a 90-degree curved tubular shape in a front view, and as shown in FIG. 1 when seen from a plane and as shown in FIG. C1 is horizontally offset H with respect to the center C2 of the lower tube opening, and receptacles 2 and 3 are provided in the upper and lower openings, respectively.
Connection flanges 4 and 5 are provided on the outer periphery thereof.

The upper drain horizontal main pipe 6 is connected to the upper receiving port 2, and the lower standing pipe 7 is connected to the lower receiving port 3. In the above-described embodiment, the drainage flowing into the offset joint 1 from the upper drainage horizontal main pipe 6 hits the upper inner wall of the joint 1 and is turned downward in the direction of the offset H and is given a swirling force.
It flows down while swirling along the inner wall surface of the lower riser from the lower inner wall surface of the. Therefore, the drainage does not flow in the entire cross section of the lower riser 7, the ventilation blockage is less likely to occur, the rebound of the drainage is eliminated and the air flow is not blocked, and the drainage standpipe, the center of the collecting pipe and the lower riser 7 Since an air core communicating with the pipe is formed and the drainage flows down in the lower standing pipe 7 while swirling, the suction force of the upper air in the pipe such as the upper standing pipe and the collecting pipe is weakened, and the air pressure in the pipe rises. It is eliminated and stable drainage with small pressure fluctuation is performed.

The offset H amount is defined by the drainage vertical pipe diameter, the maximum drainage amount, the offset horizontal pulling length, that is, the upper drainage horizontal main pipe 6.
It is designed as appropriate depending on the length. Further, in the above embodiment,
The example in which the offset joint 1 of the present invention is used in the upper part of the offset has been described, but the joint 2 in the lower part of the offset shown in FIG.
Instead of 2, the offset joint 1 of the present invention can be adopted.

The present invention is not limited to the above-described embodiment, and for example, one of the receiving ports 2 and 3 of the joint 1 can be used as a spigot and the connecting flange can be eliminated, and both openings can be used as spigot. The design can be changed as appropriate.

[0015]

As described above, the present invention provides a drainage horizontal main pipe that is connected to the upper and lower ends of the drainage pipe of a multi-layer building or to the lower end of the vertical or middle or lowermost collecting pipe through curved pipes. An offset joint, wherein the joint has a 90-degree curved tubular shape in a front view, and an upper pipe opening center is horizontally offset from a lower pipe opening center when viewed from a plane and a side surface. Therefore, it can be adopted regardless of the vertical dimension of the offset portion or the size of the horizontal pulling dimension, and even if the horizontal pulling dimension of the offset is short or the drainage flow rate is large, it is possible to prevent the rise of the air pressure in the pipe and stabilize it. Drainage is possible, the structure is simple, the size is small, the piping space is small, and the cost is low.

[Brief description of drawings]

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

FIG. 2 is a right side view of FIG.

FIG. 3 is a front 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 a diagram illustrating a state of drainage flow in an offset upper joint of a conventional example.

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

FIG. 8 is a front view showing a conventional offset structure.

[Explanation of symbols]

 1 Offset joint 6 Upper horizontal drainage pipe 7 Lower standing pipe C1 Upper pipe opening center C2 Lower pipe opening center H Offset

Claims (1)

[Claims] 1. An offset 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 the middle or bottommost collecting pipe through a curved pipe or the like. An offset joint for a drainage horizontal main pipe, which is 90 ° bent tubular in a front view, and in which the center of the upper pipe opening is horizontally offset from the center of the lower pipe opening when viewed from the plane and the side surface.