JPS6179092A - T pipe joint for drain riser - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a T-pipe joint for a drainage standpipe (hereinafter referred to as a "T-pipe joint").
Say. ) regarding.

(Prior art) The pipe diameter of a side branch pipe (hereinafter referred to as a "branch pipe") conventionally connected to this type of T-pipe joint depends on the type of drainage equipment to be connected and its diameter, as in the case of a vertical pipe. It is determined based on the design allowable flow m that is higher than the design drainage load flow rate determined according to the number of drains.

Regarding the allowable flow rate of branch pipes, assuming that circular pipes are used, and taking into account the gradual decrease in the water level in the pipe due to the acceleration of downstream drainage due to the pipe slope, if the water level is approximately 172 mm of the pipe diameter. Generally, it is determined based on. This is for the purpose of preventing the occurrence of a siphon phenomenon within the pipe and instrument trap by securing the space in the upper half of the cross section of the pipe as a ventilation zone. However, in order to achieve this purpose, it is necessary to use branch pipes of appropriate lengths necessary to reduce the water level mentioned above.

However, if the amount of water discharged per unit time is large, such as from a toilet bowl, and the branch pipe is short, as long as a circular pipe is used as the branch pipe, even if a pipe with an allowable current commensurate with the load flow rate is used. The waste water tends to flow into the vertical pipe section in a swirling state within the pipe, causing a siphon phenomenon.

From this point of view, in recent years, the horizontal direction of the cross section of the pipe is taken as the short axis, and its dimension is made to be approximately the same as the diameter of the conventional set pipe diameter, and the vertical direction is taken as the long axis, and the dimension is made larger than the pipe diameter in the horizontal direction. In addition, a so-called egg-shaped tube (an oval, elliptical, or egg-shaped tube) is used as a branch tube, and the branch tube connecting the branch tubes has an egg-shaped cross section. There are also cases where tu hands are used to prevent the occurrence of siphon drops.・However, from the perspective of focusing on economic efficiency, it is advantageous to use a circular tube, and whether or not to use an oval tube depends on factors such as the length of the branch tube, the number of bends, and the slope. For this reason, it is often difficult to judge whether a round tube is used as a branch tube and then replaced with an egg-shaped tube when a siphon problem occurs.

In such a case, as shown in Fig. 12, in the conventional royal pipe joint, the branch pipe part 1 and the vertical pipe part 2 are integrally formed, so when replacing the branch pipe with an egg-shaped pipe, The entire pipe joint had to be replaced with a branch pipe section having an egg-shaped cross section, which was an extremely time-consuming process.

(Problems to be Solved by the Invention) The present invention allows the branch pipe to be formed into an oval pipe rather than a circular pipe by separately forming the vertical pipe part and the branch pipe part of a royal pipe joint and assembling them separably. It is an object of the present invention to provide a pipe joint that can deal with moss growth by simply replacing the branch pipe section.

(Means for Solving the Problems) The royal pipe joint according to the present invention is a drainage stand formed by attaching a branch pipe part for connecting a side branch pipe to the side wall of a vertical pipe part by bolting and flange connection. In T-pipe fittings for pipes,
The pipe is characterized in that the cross section of the pipe at the flange joint portion is formed into an oval shape with the long axis in the vertical direction.

(Function) When the branch pipe is a circular pipe, the branch pipe part whose end part (hereinafter referred to as the "connection side end part") connected to the branch pipe has a circular cross section is called the vertical pipe part. When using a T-pipe joint formed by flange-joining the pipe and then replacing the branch pipe with an oval-shaped pipe, the branch pipe portion whose connecting end has an oval cross-section is replaced with the branch pipe with the circular cross-section. ■It is not necessary to replace the vertical pipe part of the pipe joint.

(Example) Next, a first example of the present invention will be described based on FIGS. 1 to 5.

The vertical pipe part 4 of the royal pipe joint 3 according to this embodiment has a circular cross section, and an oval hole 5 with a long axis in the vertical direction and a short axis in the horizontal direction is formed on the side of the vertical pipe part 4. It is installed through. The short diameter of the hole 5 is set to be approximately the same as the diameter of a branch pipe having a circular cross section when the branch pipe is connected through the branch pipe section 6, which will be described later, and the long diameter of the hole 5 is set to be approximately the same as the diameter of the branch pipe having a circular cross section. When a circular branch pipe is connected, the opening area is set to be approximately the same as the long diameter of the branch pipe, so regardless of the cross-sectional shape of the branch pipe, the opening area is larger than the flow path cross-sectional area of the branch pipe. We are prepared. .

At the periphery of the hole 5, a nearly rectangular 7-run 9-face portion 7 for connecting the branch M $ 6 is formed, and at each corner of the periphery of the 7-run nge surface portion 7, a female thread 8 for threading a bolt is carved. It is set up.

Next, the branch pipe part 6 is attached by joining the connecting flange 9 formed at the end thereof to the flange surface part 7 through the packing 10 and tightening the bolt 11 to the female thread 8. The vertical pipe section 4 in section 6
The end of the side that joins the pipe (hereinafter referred to as the "stand pipe side end").

) has an oval cross section with an inner diameter of the same shape and size as the hole 5.

That is, (1) the pipe cross section of the flange joint portion of the vertical pipe portion 4 and the branch pipe portion 6 of the pipe joint 3 is formed in an elliptical shape with the long axis in the vertical direction.

The central part of the branch pipe part 6 has the same oval cross section as the vertical pipe side end part, and the branch pipe part 6 reaches the vicinity of the connection side end part.
The inner tube pusher 13 for inserting the tube 2 is expanded upward, and the connecting end also has an oval cross-section with the long axis in the up-down direction, and also forms a connecting flange 14.

In this embodiment, as shown in FIGS. 3 and 5, a branch pipe 12 having an oval cross-section whose short axis and long axis substantially match those of the hole 5 has its tip end connected to the inside of the pipe. 13, and the connecting flange 15 is attached to the connecting 7 flange 14 via a packing 16 by tightening bolts 17.

Next, a second embodiment of the present invention will be described based on FIGS. 6 to 8. In this embodiment, an expanded portion 19 having a circular cross section and a larger diameter than the vertical pipe portion 18 is provided in the vertical pipe portion 18 having a circular cross section, and the hole 5 is formed in the side of the expanded portion 19. Similarly to the first embodiment, the branch pipe section 6. A branch pipe 12 is connected thereto.

In this embodiment, the expanded portion 19 allows the branch pipe 12 to
Even if the wastewater that has passed through the branch pipe section 6 flows into the standpipe section 18, the closure of the standpipe section 18 and the occurrence of so-called cross flow with the wastewater flowing down from the standpipe section 20 are prevented.

Next, an embodiment of the branch pipe part of the royal pipe joint according to the present invention will be described. The branch pipe part 20 shown in FIG. It gradually reduces to a circular cross section at the connecting end, and a cap nut 21 for connecting the branch pipe is attached to this part, and is used when the branch pipe is a circular pipe. The branch pipe section 22 shown in FIG. 10 also has the same configuration as the branch pipe section 20, and is used when the branch pipe is a circular pipe. Ventilation pipe connection part 23 connected to
It is different in that it has been erected. Further, as shown in FIG. 11, the horizontal pipe diameter of the lower half of the branch pipe portion 24 gradually decreases toward the connection side end, and the cross section becomes oval at the connection side end. In addition, a connecting flange 25 is formed at this portion, and is used when the branch pipe is an oval pipe.

The configuration of these branch pipe sections 20, 22, and 24 other than the above is the same as that of the branch pipe section 6 in the first embodiment of the present invention.

(Effects of the Invention) The royal pipe joint according to the present invention can be easily replaced by simply replacing the branch pipe when replacing a circular pipe with an oval pipe, or vice versa, and is extremely easy to work with. It is excellent in

[Brief explanation of the drawing]

Fig. 1 is a front view showing the first embodiment of the present invention, Fig. 2 is a plan view thereof, Fig. 3 is a right side view of Fig. 1, and Fig. 4 is a right side view with the branch pipe section removed. Top view, Figure 5 is X- in Figure 3
X sectional view, FIG. 6 is a front view showing the second embodiment of the present invention,
Figure 7 is a right side view with the branch pipe section removed;
FIG. 8 is a central vertical sectional view of FIG. 6, FIGS. 9 to 11 are perspective views showing other embodiments of the branch pipe section, and FIG. 12 is a front view showing a conventional example. 3... T-pipe joint for drainage standpipe 4... Standpipe section 5... Hole 6... Branch pipe section Applicant Kojima Manufacturing Co., Ltd. Patent attorney Oka 1) Hidehiko Figure 1 Figure 4 Figure 5 6WJ Figure γ Figure 8 Figure 9 Figure 10 Figure 11

Claims (1)

[Claims] In a T-pipe joint for a drainage vertical pipe formed by attaching a branch pipe section for connecting a side branch pipe to the side wall of a vertical pipe section by bolted flange connection, the cross section of the pipe at the flange joint section is arranged in the vertical direction. A T-pipe joint for a drainage standpipe, characterized in that it is formed into an oval shape with the long axis being .