JPH04126969U - Drainage horizontal main pipe offset upper joint - Google Patents

Abstract

(57) [Summary] [Purpose] To simplify piping by eliminating the need for air vent piping at the offset section of the horizontal drainage main pipe. [Configuration] At the bottom end of the lowest standpipe or collector pipe of the drainage pipe,
An offset upper joint 1 of a drainage horizontal main pipe 8 is connected via a bent leg pipe 7, which has a larger diameter than the horizontal main pipe 8 and whose upper end 2A is closed, and a joint 12 such as an offset lower joint 9, 10 is connected to the lower end. A substantially inverted L-shaped drainage conduit pipe 3 is provided within the provided joint body 2. The drainage conduit pipe 3 has a drainage inlet joint 14 projecting laterally, the inner lower end of the joint 1 serves as a discharge port 13, and a ventilation hole 15 is provided in the inner upper wall 3A of the joint body 2. A vent pipe 4 is provided in communication with the upper side wall of the main body 2, and a vent valve 5 is provided at the outer end of the vent pipe 4, which opens when the pressure inside the pipe becomes negative.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention aims to offset horizontal drainage main pipes in drainage piping installed in multi-story buildings. This relates to the upper joint of the section.

0002

[Conventional technology]

Generally, drainage piping installed in multi-story buildings is installed on each floor, as shown in Figure 2. A horizontal branch pipe 22 connected to a drainage device 21 such as a toilet bowl, and a collecting pipe to which each horizontal branch pipe 22 is connected. 23, a drainage standpipe 24 that connects the collecting pipes 23 on each floor into a straight line, and a collecting pipe on the lowest floor. 23 (or standpipe 24) with a drainage horizontal main pipe 26 connected to the lower end via a bent leg pipe 25, etc. It is constructed in a single tube type.

0003 Conventionally, when the first floor of a building is a garage, the horizontal drainage main pipe 26 is as shown in Figure 2. The offset part is formed by the upper and lower joints 27, 28 made of bent pipes and the intermediate pipe 29 so that The upper joint 27 is An air vent pipe 30 is provided to communicate and connect the upper surface on the upstream side and the upper surface on the downstream side of the lower joint 28. I'm being kicked.

0004 This one-pipe drainage piping is for draining sewage and miscellaneous water into the same drainage pipe, and inside the standpipe 24. The function is to form an air core by the flow of wastewater, which plays the same role as a ventilation standpipe. Since there is no need to install a ventilation standpipe in parallel with the drainage standpipe 24, the drainage There are advantages such as a simpler pipe.

[0005]

[Problem that the idea aims to solve]

In the conventional example above, if an offset section is provided in the horizontal drainage main pipe 26, the air vent arrangement The problem is that pipes 30 must be installed in parallel, which impairs the simplicity of single-pipe drainage piping. There is. This invention was made in view of the above-mentioned circumstances, and its purpose is to This method eliminates the need for air vent piping and reduces the air pressure in the pipe at the offset section when the drainage flow rate is high. The system maintains the water below the standard value even when the water is wet, and enables stable drainage flow with small pressure fluctuations. Provides an offset upper fitting for the horizontal drain main pipe.

[0006]

[Means to solve the problem]

In order to achieve the above object, the present invention takes the following technical measures. In other words, the present invention is designed to install water at the lower end of the standpipe or the lower end of the lowermost collecting pipe of the drainage piping of a multi-story building. , an offset upper joint of a drainage horizontal main pipe connected via a bent leg pipe, the upper Inside the fitting body where the end is closed and the lower end has a joint such as an offset lower fitting. In this case, the approximately inverted L-shaped drainage conduit pipe makes the drainage inlet joint protrude to the side, and the drainage outlet The pipe is installed with the pipe facing downward, and a ventilation hole is provided in the upper wall of the joint body of the drainage conduit pipe. , a ventilation pipe is provided in communication with the upper side wall of the main body, and internal pressure is applied to the outer end of the ventilation pipe. It is characterized by a vent valve that opens when the pressure becomes negative.

[0007]

[Effect]

According to this invention, drainage flows from the standpipe through the collecting pipe, bent leg pipe, and upper horizontal main pipe. It flows into the hand drainage conduit pipe from the joint, reaches the bottom of the joint body from the discharge port, It flows into the lower horizontal main pipe through the offset lower joint and is discharged to a clubhouse, etc. this When the drainage flow rate is low, the air pressure inside the offset upper joint is low; Stable drainage is achieved without negative pressure. Therefore, the wastewater flow rate is high. Then, the standpipe section of the drainage conduit pipe of the upper joint is filled with drainage water, but the drainage conduit pipe The inner upper part and the inside of the fitting body are communicated via a ventilation hole, and the drainage pipe The air inside the fitting body and the upper part of the drainage pipe is sucked and discharged by the drainage flowing down from the mouth. Therefore, an increase in the air pressure inside the joint is prevented. And the air pressure inside this joint However, when the pressure decreases and becomes negative, the Dolgo ventilation valve opens and outside air passes through the ventilation pipe. The water flows into the hand body, eliminates negative pressure, and stabilizes drainage.

[0008]

【Example】

Hereinafter, embodiments of the present invention will be described based on the drawings. In Figure 1, an offset upper joint 1 connects a joint body 2 and a drainage pipe 3. Trachea 4 and a Dolgo vent valve configured to open when negative pressure occurs and close when positive pressure occurs. 5, and the other parts except the Dolgo ventilation valve 5 are integrally molded by casting. There is. In addition, 6 is the lower end of the lowermost collecting pipe or standpipe, 7 is the leg bent pipe, and 8 is the upper drainage pipe. Horizontal main pipe, 9 is intermediate vertical joint pipe, 10 is offset lower joint bent pipe, 11 is offset This is the horizontal main pipe for lower drainage. In addition, the piping above the bent leg pipe 7 is shown in the conventional example. Since it is the same as 2, FIG. 2 will be adopted and the explanation will be omitted.

[0009] The joint body 2 has a larger diameter than the horizontal main pipes 8 and 11, is closed at the upper end 2A, and is closed at the lower end. A tapered portion 2B is formed, and an intermediate stand pipe 9 (or is the joint 12 of the offset lower joint bent pipe 10), which has an upward bend on the upper side wall. A ventilation pipe 4 is formed. Inside the joint body 2, there is an approximately inverted L-shaped horizontal main body. The drainage conduit pipe 3, which has the same diameter as the pipe 8, is concentric with the discharge port 13 facing downward, and is connected to a joint. It opens near the upper end of the tapered part 2B of the main body 2, and the drain inlet joint 14 (the upper Pass the drainage horizontal main pipe joint) through the side wall of the joint body 2 opposite to the ventilation pipe 4 and protrude to the side. It is provided so as to come out and communicates with the upper wall 3A of the drainage conduit pipe 3 and the upper part of the joint body 2. A ventilation hole 15 is provided. In addition, at the outer end of the drain inlet joint 14, there is a horizontal main pipe insertion part. 14A is formed, but the fitting part 14A is removed and the joint part 7A of the bent leg tube 7 is Direct drainage inlet joint 14 can be inserted and connected.

0010 In the above embodiment, the wastewater flowing down from the drainage standpipe 6 is transferred to the bent leg pipe 7, From the drainage inlet joint 14 through the side drainage main pipe 8, through the drainage conduit pipe 3, into the joint body 2. The inflow passes through the intermediate vertical joint pipe 9, the offset lower joint bent pipe 10, and enters the lower horizontal drainage main pipe 11. It flows in and is discharged to the clubhouse, etc. And when the drainage flow rate is low, offset The air pressure inside the upper joint 1 is low and there is no negative pressure, ensuring stable drainage. be exposed. Therefore, when the drainage flow rate increases, the standpipe section of the drainage conduit pipe 3 of the joint 1 As shown by the two-dot chain line in Figure 1, the pipe is filled with drainage water, but it is connected to the inner upper part of the drainage pipe 3. It communicates with the upper part of the hand body 2 through a ventilation hole 15, and also communicates with the upper part of the hand body 2 through a drainage pipe 3. The air above the fitting body 2 and the drainage conduit pipe 3 is sucked by the water flowing down from the port 13. Since the water is discharged, the air pressure inside joint 1 does not increase and stable drainage is performed. . Then, when the air pressure inside the joint 1 decreases and becomes negative pressure, the Dolgo ventilation valve 5 opens. When opened, outside air flows through the ventilation pipe 4 into the joint body 2 and the drainage conduit pipe 3, and the negative pressure is released. At the same time as the water is turned off, the Dolgo ventilation valve 5 closes to ensure stable drainage. like this Therefore, fluctuations in air pressure not only in the drainage pipe but also in the fitting 1 are small and constant. is maintained below the standard value, ensuring drainage stability and reducing noise.

[0011] The present invention is not limited to the above embodiments, and for example, the upper joint 1 can be Set lower joint bend pipe 10 can be connected.

0012

[Effect of the idea]

As mentioned above, the present invention aims This is an offset upper joint of the drainage horizontal main pipe connected to the lower end of the pipe via a leg bent pipe. This means that the upper end is closed and the lower end has a joint such as an offset lower joint. Inside the hand body, there is a roughly inverted L-shaped drainage conduit pipe with a drainage inlet joint protruding to the side. The drainage pipe is installed with the outlet facing downward, and there is a ventilation hole in the upper wall of the fitting body of the drainage pipe. A ventilation pipe is provided in communication with the upper side wall of the main body, and a pipe is provided at the outer end of the ventilation pipe. A device characterized by being equipped with a vent valve that opens when the internal pressure becomes negative pressure. Therefore, there is no need for air vent piping at the offset part, and the air pressure inside the pipe is reduced to the drainage flow rate. Even when there is a lot of pressure, it can be maintained below the standard value, and the pressure fluctuation is small and stable It is possible to simplify the piping while making it possible for the wastewater to flow downward.

[Brief explanation of drawings]

FIG. 1 is a central vertical sectional view showing an embodiment of the present invention.

FIG. 2 is a schematic front view of the entire drainage pipe showing a conventional example.

[Explanation of symbols] 1 Horizontal main pipe offset upper joint 2 Joint body 3 Drainage pipe 3A Upper wall 4 Ventilation pipe 5 Dolgo vent valve 6 Lower end of standpipe or collecting pipe 7 Leg bent tube 8 Upper drainage horizontal main pipe 10 Offset lower fitting bent pipe 11 Lower drainage horizontal main pipe 12 Joint 13 Outlet 14 Drain inlet joint 15 Vent

Claims (1)

[Scope of utility model registration request] Claim 1: An offset upper joint of a horizontal main drainage pipe connected to the lower end of a standpipe or the lower end of a lowermost collector pipe of a drainage pipe in a multi-story building via a bent leg pipe, the upper end of which is closed. At the same time, a substantially inverted L-shaped drainage conduit pipe is disposed within the joint body having a joint such as an offset lower joint at the lower end, with the drainage inlet joint protruding laterally and the discharge port facing downward. A vent hole is provided in the upper wall of the joint body of the conduit pipe, a vent pipe is provided in a communicating manner in the upper side wall of the main body, and a vent valve that opens when the pressure inside the pipe becomes negative pressure is provided at the outer end of the vent pipe. A drainage horizontal main pipe offset upper joint characterized by being provided.