JP3322963B2 - Drainage pipe - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a drain pipe with an internal spiral rib (hereinafter referred to as "spiral pipe") used for a vertical drain pipe of a high-rise building or the like, which is connected to a drain pipe joint with an internal spiral rib.
The present invention relates to a drainage pipe having a vertical pipe .

[0002]

2. Description of the Related Art In recent years, a drainage pipe for discharging wastewater such as sewage and miscellaneous wastewater from a building to a sewage main pipe has been disclosed in Japanese Patent Application No. 4-132.
No. 320, as previously proposed by the present inventors, a spiral pipe having a plurality of spiral ribs having a predetermined inclination angle with respect to the pipe axis formed on the inner surface thereof is a drain vertical pipe, and the central part is a spiral pipe. There is a shift to a so-called special single-pipe drainage pipe in which a vertical pipe is formed using a special joint having a larger diameter (such as an AD joint manufactured by Sekisui Chemical Co., Ltd.).

[0003] In other words, this single-pipe drainage pipe sucks air into the vertical pipe from the extended ventilation pipe on the top floor when drainage flows in from each floor. This alleviates the pressure in the negative pressure portion in the vertical pipeline that has been pulled down together with the drainage, and reduces the decrease in trap water sealing provided in the horizontal branch pipe. In addition, since the vertical pipe uses a spiral pipe provided with multiple spiral ribs on the inner surface, the drainage flowing into the vertical pipe is given a swirling force by the spiral rib and flows down along the pipe wall surface. . Accordingly, an air core is always formed at the center of the vertical pipe, and an excellent effect that the flow rate (flowing capacity) that can flow down without breaking the trap is significantly improved.

[0004]

However, the drainage pipe has the following points to be improved. That is,
The spiral rib of the spiral tube has a cross-sectional shape such as a triangle, a semicircle, a square, a deformed triangle, and an inclined semicircle. At the connection end with the joint, the ends of the spiral rib project from the tube wall as projections. You will be in a state like that.

[0005] Therefore, various solids contained in the drainage, such as hair, toilet paper, lint, and pieces of cloth, may be caught on the upper end surface of the spiral rib of the spiral tube. When these solids are caught and accumulated on the upper end surface of the spiral rib, the diameter of the pipe is partially reduced in this portion, and the flow-down capability of the pipe may be reduced.

Further, when the drainage flowing down along the pipe wall of the joint hits the upper end surface of the spiral rib of the lower spiral pipe, the drainage springs toward the center of the vertical pipe and is formed at the center of the vertical pipe. There is also a problem that the air core is crushed to obstruct air flow. The present invention is Gana it collides in view of such circumstances, the helical rib upper end surface of the spiral tube wastewater has been flowing down along the tube wall by the upper helical tube is connected to the lower joint
The purpose is to provide a new drainage pipe .

[0007]

In order to achieve such an object, a drain pipe according to the present invention is connected to a lower side.
Diameter of the top of the spiral rib of the drain pipe with internal spiral rib
The inner diameter at the end of the lower port is formed to the same or slightly smaller diameter as
Lower fittings for drainage pipe fittings with internal helical ribs
Equipped with a vertical pipe to which a drain pipe with internal spiral ribs is connected
I did it. Also, in this joint, the end of the upper port
The inner diameter of the part, of the inner spiral ribbed tube connected to the upper side,
It is preferable that the diameter is substantially the same as the inner diameter of the pipe.

In the above structure , the spiral pipe is not particularly limited. However, most of the drain pipes of the building are provided through the fire prevention compartment, so that the inner pipe with the internal spiral rib is provided inside the outer pipe having fire protection. It is preferable that the inner tube is fitted and integrated.

[0009] As the outer pipe, usually, a thin steel pipe (having a thickness of about 1/2 of a carbon steel pipe for piping), a concrete pipe,
Copper tubes, asbestos tubes and the like can be mentioned. The inner tube is not particularly limited, but in consideration of moldability of the ribs, economical efficiency, difficulty in attaching slime, etc., polyvinyl chloride resin,
Synthetic resin tubes such as polyethylene resin and silane cross-linked polyethylene resin are preferred.

[0010] Further, the spiral direction, spiral pitch,
The height of the ribs and the number of ribs vary depending on the setting of the limit level of the drainage capacity. In the case of a drainage pipe having an inner diameter of 80 to 200 mm, the following conditions are preferable. That is, the number of spiral ribs is 4 to 24 (especially 10 to 14).
It is preferable that they are arranged evenly in the circumferential direction in the order of (1).

The height of the rib is not particularly limited, but is 0.5 / 100 to 7.0 / 100 of the inner diameter of the pipe (in particular, 2/10
0 to 5/100) is preferable. The direction of the spiral may be right-handed or left-handed, but the pitch of the spiral is preferably about 3 to 20 times (especially 4 to 12 times) the pipe diameter. The cross-sectional shape of the rib is not particularly limited, and examples thereof include a triangle, a semicircle, a square, a petal, a deformed petal, an inclined semicircle, an inclined triangle, and an inclined rectangle.

[0012]

According to the above construction, when the drainage vertical pipe is formed by using the joint and the spiral pipe, the drainage flowing from each floor flows down along the pipe wall by the action of the spiral rib, and the vertical pipe is formed. An air core is always formed at the center of the road. Then, while flowing into the joint while flowing, it flows into the lower spiral tube via the joint, but the inner diameter of the end of the lower end receiving port of the joint is substantially the same as or slightly smaller than the diameter drawn by the top of the spiral rib. Therefore, the drainage flows into the lower spiral tube without hitting the upper end surface of the spiral rib.

The drainage flowing into the lower helical tube is swirled by the upper helical tube, so when passing through the joint, it tends to spread outward by centrifugal force. Flow down again. Therefore, it flows down while being further swirled by the spiral rib of the lower spiral tube. Also, if the inner diameter of the end of the upper receiving port of the joint is set to be substantially the same as the inner diameter of the spiral pipe, sewage and miscellaneous drainage flowing down along the pipe wall while turning in the upper spiral pipe, It flows down along the inner wall of the joint while keeping the swirling flow smoothly without colliding with the upper end surface of the joint.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the drawings showing the embodiments. FIG. 1 shows the structure used in the present invention .
1 shows an embodiment of a joint according to the present invention. As shown in the drawing, this joint 1 has upper and lower receiving ports 11 and 12 of a spiral pipe 2 like a so-called flexible joint for drainage steel pipes (trade name: Eslon AD joint manufactured by Sekisui Chemical Co., Ltd.). Horizontal branch pipe 3
Are provided.

As shown in FIG. 2, the upper port 11 of the joint 1
Spiral end inner diameter D ₁ of the can, they become substantially the same as the inner diameter d ₁ of the spiral tube 2 to be connected, as shown in FIG. 3, the end portion inner diameter D ₂ of the lower socket 12, which is connected The diameter d ₂ is substantially the same as the diameter d ₂ drawn by the top 22 of the spiral rib 21 of the tube 2. Spiral tube 2
Is a thin steel pipe 2a as an outer pipe as shown in FIGS.
Further, a synthetic resin pipe 2b provided with a spiral rib 21 having a predetermined inclination angle with respect to the pipe axis on a pipe wall 20 as an inner pipe is fitted and integrated.

That is, as shown in FIG. 1, if a drain pipe having a vertical pipe A in which the upper and lower spiral pipes 2 and the spiral pipe 2 are connected via the joint 1 is formed, the water flows into the vertical pipe A. The drained water flows down along the wall surface of the spiral tube 2 while being swirled by the spiral rib 21. The swirling drainage flows from the upper spiral pipe 2 into the joint 1 and then flows down through the lower spiral pipe 2. In this embodiment, as shown in FIG. The upper socket 11 of the joint 1
End inner diameter D ₁ of the can is substantially the same as the inner diameter d ₁ of the spiral tube 2.

Therefore, the pipe wall of the spiral tube 2 and the inner peripheral surface of the upper port 11 of the joint 1 are connected substantially flush with each other. There is no problem of stocking and solid matter in the drainage.
On the other hand, the drainage flowing down in the joint 1 flows into the lower spiral pipe 2 together with the drainage of each floor flowing from the horizontal branch pipe 3, as shown in FIG. since the inner diameter D ₂ of are substantially the same as the diameter d ₂ as the profile of the top portion 22 of the helical rib 21, there is no the upper end surface of the spiral rib 21 projects into the conduit in a joint portion between the joint 1.

Therefore, the drainage flowing down in a swirling state along the inner wall surface of the joint 1 flows down into the lower spiral tube 3 without colliding with the end face of the spiral rib 21. Also,
The drainage that has flowed into the lower spiral tube 2 has a swirling flow, so it spreads due to the centrifugal force and immediately flows down along the tube wall of the lower spiral tube 2. That is, according to the above-mentioned conduit, there is no obstacle at the joint between the spiral pipe 2 and the joint 1,
The drainage flows smoothly, and the drainage springs out to the center of the pipe by the upper end surface of the spiral rib 21 to block the air core at the center of the pipe, or solid matter in the drainage gets caught on the end face of the spiral rib to cause clogging of the pipe. No more. (Embodiment 1) Using a 100A spiral pipe having the following configuration and the joint 1 shown in FIG. 1, an extended ventilation pipe type drainage vertical pipe of a 10-story building is formed, and from each floor of this drainage vertical pipe. 75A horizontal branch pipe is connected, and 12
A 5A horizontal main pipe was connected to obtain a drainage pipe for buildings.

[Spiral tube] Rib height 3 mm (3/100 of diameter) Spiral rib pitch 750 mm (7.5 times of diameter) Number of spiral ribs 12 Sectional shape of spiral ribs Approximate isosceles triangle [Joint] The inner wall surface of the lower end of the hard pipe joint for drainage of J1S K-6739 (trade name: MD joint manufactured by Sekisui Chemical Co., Ltd.) is gradually reduced in diameter, and the inner diameter of the lower end is determined by the diameter drawn by the top of the spiral rib of the spiral pipe. Example 2 A drainage pipe for a building was obtained in the same manner as in Example 1 except that the joint 5 shown in FIG. 4 was used as the joint. In FIG. 4, reference numeral 51 denotes a turning blade provided on the inner wall surface of the joint 5.

[Joint 5] The lower end inner wall surface of a special joint (AD joint manufactured by Sekisui Chemical Co., Ltd.) having a lateral branch pipe connection port 13 on the side surface and having a large inner diameter near the inflow port is gradually formed. A joint whose diameter is reduced and the inner diameter of the end of the lower receiving port is made substantially the same as the diameter drawn by the top of the spiral rib of the spiral tube (Comparative Example 1) As shown in FIG.
A drain pipe for a building was obtained in the same manner as in Example 1, except that a hard pipe joint for drainage of No. 6739 (AD joint manufactured by Sekisui Chemical Co., Ltd.) 6 was used. (Comparative Example 2) An inflow port of a horizontal branch pipe is provided on a side surface as a joint,
Except for using a special joint (Sekisui Chemical Co., Ltd. product name ESLON AD joint) with a larger inside diameter near the inflow port,
A drainage pipe for a building was obtained in the same manner as in Example 1.

The wastewater mixed with lint or toilet paper as a waste is allowed to flow down into the drainage pipes of Examples 1 and 2 and Comparative Examples 1 and 2, and its maximum flowability and
The binding of dirt to the end face of the spiral rib was examined, and the results are shown in Table 1.

[0022]

[Table 1] As shown in Table 1, according to the drainage pipe of the present invention, the drainage capacity is improved as compared with the conventional drainage pipe, and it can be understood that a stable drainage capacity can always be secured without catching dirt.

The present invention is not limited to the above embodiment.
For example, in the above-described embodiment, two inlets for the horizontal branch pipe are provided in the joint, but it may be omitted or one.
There may be more than two places.

[0024]

Than is constructed as described above, according to the present invention, the onset
Since the drainage pipe according to the present invention is configured as described above, it has excellent drainage capacity and does not cause clogging.

Therefore, a sufficient drainage capacity can be ensured even with a single-pipe type, and even in a high-rise building, the piping space can be kept small, and the effective space on each floor can be sufficiently ensured.

[Brief description of the drawings]

FIG. 1 is a half sectional view showing one embodiment of a drainage pipe according to the present invention.

FIG. 2 is a cross-sectional view showing a connection between a joint of a drainage pipe and an upper spiral pipe of FIG. 1;

FIG. 3 is a cross-sectional view showing a connecting portion between a joint of the drainage pipe of FIG. 1 and a lower spiral pipe.

FIG. 4 is a sectional view showing another embodiment of the joint used in the present invention.

FIG. 5 is a half sectional view of a conventional drainage pipe as Comparative Example 1.

[EXPLANATION OF SYMBOLS] end inner diameter D ₂ below the receiving vertex D ₁ upper receptacle 11 of the A Tatekanro 1 joint 2 helical tube 11 upper receiving opening 12 under the receiving opening 20 wall 21 spiral ribs 22 spiral ribs 21 diameter end inside diameter d ₁ the inner diameter d ₂ top 22 of the spiral tube 2 of the mouth 12 is drawn

Claims (2)

(57) [Claims] An inner spiral having an inner diameter of an end portion of a lower receiving port formed to be substantially the same as or slightly smaller than the diameter drawn by the apex of a spiral rib of a drain pipe with an inner spiral rib connected to a lower side. Drain with internal spiral rib at the lower receiving port of the drainage pipe fitting
A drainage line with a vertical line to which the tubes are connected. 2. The drainage pipe joint with an inner spiral rib has a diameter substantially equal to the inner diameter of the pipe with an inner spiral rib connected to the upper side.
The inner diameter of the end of the upper port is formed in the upper port.
2. A drain pipe with an inner spiral rib is connected to the drain pipe.
Drainage pipeline.