JP2003013477A - Construction drainage system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a new proposal to the confluence of a riser and a drain pipe concretely regarding a new construction drainage system mainly in an apartment house. SOLUTION: In the construction drainage system, the drainage system is composed of a drainage riser penetrated to each floor, appliance drain pipes introduced from water-related apparatuses on each floor and confluent-section joints connecting the appliance drain pipes to the riser, the levels of the joints are made lower than the levels of drainage floor slabs, a fluid in the appliance drain pipes is given a vertical speed component sufficiently and connected to the joints are mounted while communicating pipes supplying and removing air to and from the joints and flows in the drainage risers are formed in full- flow siphon flows. 2: the floor slab, 3: a vent riser, 3a: the communicating pipe, 4: the riser, 4a: a stack vent pipe, 4b: a drain horizontal main pipe, 5: the water- related apparatus, 6: the drain pipe (a polybutene pipe) and 7: the joint.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention mainly relates to a new building drainage system for an apartment house.

[0002]

2. Description of the Related Art The conventional construction drainage system for apartment houses is
Normally, for drainage stacks (hereinafter referred to as "standpipes"), drainage from the water supply equipment on each floor such as the kitchen or washbasin is connected to the equipment drainage pipes (hereinafter referred to as "drainpipes"), and slightly It was common to introduce a gradient to the confluence joint (hereinafter referred to as the joint), and to join the joint on the same floor as the water supply equipment. At this merging portion, the merging is performed at right angles to the vertical pipe or at a slight inclination, but this joint uses a large capacity, and particularly requires a large horizontal cross-sectional area. . Therefore, the weight of the joint is heavy and expensive. In terms of space, a large space was required, and the freedom of design tended to be lost. Furthermore, the drainage pipe is thick and it is necessary to keep the standard gradient, which is a bottleneck in the construction plan.If the drainage pipe is clogged or water leaks due to deterioration, it can be repaired without destroying the interior of the building. Instead, the replacement of drainage pipes requires interruption of use and enormous cost.

In other words, in the conventional construction drainage system, the vertical velocity component of the fluid flowing in the drainage pipe is extremely small, and at the confluence with the vertical pipe, the fluid occupying the drainage pipe has a very large pipe cross-section occupation ratio. Ventilation resistance becomes abnormally large when it joins with the fluid descending in the vertical pipe. For this reason, interference with the fluid flowing in the vertical pipe that occurs when the fluids flowing in the drainage pipe join together causes an increase in the negative pressure inside the pipe, which is a cause of trap breakage and abnormal noise. Basically, such a drawback is that the vertical velocity of the fluid flowing in the vertical pipe that penetrates each floor and the vertical velocity component of the fluid flowing in the lateral direction, which is the drainage from the various appliances on each floor, are the points of the confluence or joints. A large difference in causes the generation of negative pressure, which causes the trap to be broken and an abnormal sound to be generated. For this reason, it is necessary to make the joint large, which also increases the cost. Further, if the trap is broken, the sanitary equipment is not suitable, and a heavy burden is placed on maintenance. Furthermore, since the equipment drainage is made into an open-drain flow and merges with the vertical pipe at any time, the pipe shape is thick and a pipe gradient is required at all parts, making it difficult to design, construct, maintain, and refurbish the building. . And it is virtually impossible to renew the drain.

In view of the above-mentioned conventional techniques, the present inventor has proposed a new technique in which the flow of the fluid in the drainage pipe is a full-flow pressure and siphon flow. That is, the content is
A building drainage system consisting of a vertical pipe penetrating each floor, a drainage pipe guided from a water fixture on each floor, and a joint directly connecting it to the vertical pipe, the level of the joint being lower than the level of the drainage floor slab. It is characterized in that the fluid in the drain pipe is sufficiently given a vertical velocity component and then merged with the fluid in the stand pipe.

In the already proposed technique, drainage from each water-surrounding device is carried out by independent drainage pipes, and the vertical velocity component is increased with respect to the fluid in the vertical pipe to join them, so that the so-called ventilation resistance is significantly reduced. It has been done. Therefore, the negative pressure generating action in the vertical pipe is extremely reduced as compared with the conventional building drainage system. Since the fluid in the drainage pipe is a full flow due to the siphon phenomenon, it can be a relatively thin pipe, and there is no need to provide a gradient toward the vertical pipe.

[0006]

DISCLOSURE OF THE INVENTION The present invention is intended to further improve the above-mentioned proposed building drainage system, and more specifically, is a new proposal for merging a vertical pipe and a drain pipe. .

[0007]

The features of the present invention are: a drainage vertical pipe penetrating each floor, an equipment drainage pipe guided from a water-surrounding equipment on each floor, and a joint joint for connecting the equipment drainage pipe to the drainage vertical pipe. And lowering the level of the joint joint below the level of the drainage floor slab and sufficiently imparting a vertical velocity component to the fluid in the equipment drain pipe, and then connecting to the joint joint, and connecting the joint air to the joint pipe. Is a building drainage system in which the flow in the drainage stack pipe is a full-flow siphon flow, and preferably the drainage pipe is equipped with a drainage storage part in the joint, and is led from the water surrounding equipment on each floor. Is also a full-flow siphon flow, and more specifically, it is a building drainage system in which a ventilation vertical pipe is provided and a communication pipe for supplying and removing air is connected to the ventilation vertical pipe.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION In a drainage system consisting of a previously proposed standpipe penetrating each floor, a drainage pipe led from a water fixture on each floor, and a joint for directly connecting it to the standpipe, the joint level is drained. According to a drainage experiment in which the fluid in the drain pipe is lowered to a level lower than that of the floor slab and a vertical velocity component is sufficiently added to the fluid in the vertical pipe before it joins the fluid in the vertical pipe. This makes it possible to facilitate ease of use and effectively utilize the space under the floor.

The present invention is to further improve this, and relates to a standpipe system which allows full flow, in which drainage pipes are made into individual small diameter pipes and are directly connected to the standpipes for wastewater treatment. In the already proposed siphon type drainage system, the flow from the drainage pipe at the joint position where it joins the vertical pipe is a high-speed flow that is parallel to the gravity line and flows down the pipe cross section at full flow. However, if this high-speed drainage is combined with the conventional vertical pipe, it will flow down in the vertical pipe as a gas-liquid two-phase flow with a low filling rate.

[0010] However, the proposed technique preferably has further points to be improved, and although the allowable flow rate for designing the vertical pipe can be increased and considerable resource saving such as pipe material can be achieved, it is basically extended. It uses a top ventilation system,
There is a structural problem in which drainage pipes must rely on ventilation. In other words, this drainage system cannot be realized unless the drainage pipe does not depend on the function of penetrating the entire amount of ventilation that is sucked from the vertical pipe via the upright ventilation pipe.

In other words, if the vertical pipe system of gas-liquid two-phase flow with partial refilling is performed by the apex ventilation system without ventilation circulation function, the drainage pipe has a path for removing the entrained air and the opening beyond that. Mandatory in any way while using the conditions. Therefore, in the ordinary drainage system design method, the upper limit of the design drainage flow rate is suppressed to about 1/2 the water depth of the drainage pipe diameter in order to ensure the ventilation function of the drainage pipe, and as a result, the drainage cross section is doubled. In large-scale constructions where it becomes necessary to install diameter pipes at a specified slope, and drain pipes tend to be long and thick, it is difficult to use a drainage system with a top ventilation system, or an uneconomical piping structure is required. There are quite a few things we have to do.

The present invention has been made to solve the above problems and minimizes the entrained air sucked from the rising aeration pipe by making the flow of the vertical pipe a full-flow siphon flow, and preferably a small-diameter aeration pipe. The ventilation pipe is connected to a communication pipe (hereinafter referred to as a communication pipe) that balances the pressure by supplying and removing air to the joint section from the ventilation pipe, and the drain pipe does not depend on the ventilation function. The drainage system was established to make the drainage full and to make the drainage pipe narrower and unnecessary. In other words, although it was a two-pipe type, it was possible to achieve the same vertical pipe installation space, resources, and cost as the single-pipe type, which is not only useful in the construction plan but also meets the many value standards shown above. It goes without saying that it will be an adapted drainage system. The present invention constructs a sanitary / engineering-free drainage system based on a precise observation and consideration of water and aerodynamic behavior in a drainage pipe and a new idea for such a proposition that is seemingly difficult.

All the drainage from the equipment is directly connected to a special joint which is installed individually and independently on the stand pipe. For example, the drain pipe is, in principle, unified to a diameter of 20 mm, and the connection level to the stand pipe is equivalent to the first floor height. (Use floor slab, 2m) The lower part is standard, and this drainage system is further equipped with a vent pipe and a small-diameter communication pipe that balances the air pressure in a special joint corresponding to each floor. Siphon drainage and intermittent siphon drainage ( Full-flow siphon flow in the vertical pipe) is used for each floor ventilation, and for partial drainage small drainage ventilation circulation function. In addition, since the drainage pipe is basically installed horizontally with no slope, it does not share the ventilation performance, so the maximum allowable flow rate for design is maximum. The drainage flow is full flow and is pumped by the head of the vertical pipe, and if there is a vertical pipe on the downstream side, it becomes a suction flow due to the head of the vertical pipe. In addition, the vertical pipe is connected to the drainage horizontal main pipe at the lowest position for drainage, but this drainage horizontal main pipe may also be a finer pipe than the conventional one, and furthermore, it can be sufficiently drained by being arranged with no gradient. is there.

When referring to the drainage pipe, basically, independent flexible pipes are used, so that the drainage pipe does not have to have such a large capacity. For example, a polybutene pipe having a diameter of 20 mm is sufficient, and Since this type of pipe is sufficient for connecting to the equipment, the work advantage is remarkably large. In particular, the one-touch connection method has been developed for polybutene pipes, and it is optimal to use this for connection. More specifically, the drainage from each device is individually connected to a flexible pipe, which is placed on the floor slab and connected to the fitting at a level below each floor. Thus, flexible tubing is initially bent horizontally and then vertically. For this reason, the fluid in the flexible pipe joins the fluid in the vertical pipe in a state of high-speed full flow.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the construction drainage system of the present invention will be described in more detail with reference to the drawings. FIG. 1 is a conceptual diagram of the present construction drainage system, and FIG. 2 is an enlarged conceptual diagram near the joint 7. Reference numeral 2 indicates a floor slab on each floor.
A vertical pipe 4 having a diameter of 50 mm passes through each of these floors, and a drain pipe 6 from a water supply device 5 is connected to the vertical pipe 4.
In this figure, a basin 5 is shown as an instrument, which has a caliber of 2
A 0 mm polybutene tube 6 is connected. Of course, the polybutene pipe is also connected to other devices not shown. This polybutene pipe 6 is stretched laterally on the floor slab 2 without inclination, reaches the stand pipe 4, changes its direction downward, and is directly connected to a joint 7 with the stand pipe 4. The polybutene pipe 6 may be stretched as it is, but the bent portion may be formed by using a bent pipe (not shown), and preferably, a U-shaped pipe portion is formed upward or downward near the bent portion. It is preferable to be subjected to full flow / siphon flow. Then, the drainage horizontal main pipe 4b is also arranged at the bottom of the vertical pipe without any gradient.

In this example, the joint 7 is provided near the floor slab 2 below, and the end of the polybutene pipe 6 is connected to the peripheral pipe 7b standing upright around the vertical pipe 4,
Normally, the vertical pipe 4 is connected to the central portion. That is, the joint 7 surrounds the stand pipe 4 and is provided with a plurality of peripheral pipes 7b around the vertical pipe 4. A push lock described later is attached to the peripheral pipe 7b, and the tip of the polybutene pipe 6 is connected thereto. It

Specifically, the joint 7 has a funnel type 7 at the lower end.
a, and the drainage storage portion 7c is provided on the upper portion thereof. The size of the drainage reservoir 7c of the joint 7 is
Stand pipe 4 has a diameter of 50 mm and drain pipe 6 has a diameter of 20 mm
In the case of, for example, the diameter is 125 mm and the height (length) is 50.
It is a cylindrical body of about 0 mm. As described above, the drainage pipe 6 is arranged on the upper surface of the drainage storage portion 7c so as to surround the vertical pipe 4, and one of them is used for the communication pipe.

In the present invention, the ventilation standpipe 3 is usually arranged side by side with the standpipe 4, and the upper end thereof is connected to form an open end (extended vent pipe 4a). A communication pipe 3a is provided between the joint and the joint. The aeration stand tube 3 may have a diameter of 32 mm, for example.
The diameter may be about 25 mm.

In this example, the height difference from the floor slab 2 to the joint 7 is 2.5 m. Therefore, the drainage fluid in the vertical pipe 4 accelerates vertically (falls at a substantially constant flow velocity) and drops vertically, whereas the drainage fluid from each fixture on each floor flows on the floor slab 2 by the polybutene pipe 6. In the horizontal direction, and then the vertical velocity component is increased by the drop (2.5 m) with the joint 7 to join the fluid of the vertical pipe 4 in the joint 7, where the joining of the two is It is done reasonably.

That is, the drainage water from the drainage pipe is temporarily stored in the drainage storage portion 7c of the joint 7, and the full-flow siphon flow
In other words, the flow of the vertical pipe is a full-flow siphon flow, and for this reason, preferably, the ventilation vertical pipe 3 is provided side by side, and the communication pipe 3a leading to each drainage storage section 7c is provided to perform the ventilation function. It is provided in the drainage storage section 7c.

FIG. 3 shows a push-lock mechanism 20 suitably used for connecting the drainage pipes, the drainage pipe and the vertical hole of the joint, and the drainage pipe and the pipe on the device side according to the present invention. That is, the grab ring 22, the washer 23, the O-ring 24, and the cap 25 that supports them are screwed into the socket 21. The socket 21 is formed with a female screw portion 26, which is connected to a pipe on the equipment side around water. On the other hand, the polybutene pipe 6 in which the collar 27 is fitted inside the tip is inserted into the cap 25, and the grab ring 22 bites into the outside of the polybutene pipe 6 to be connected. The connection between the two is reliable and the work is extremely easy.

[0022]

As described above, the present invention merges the fluid from the drain pipe with the fluid in the vertical pipe while swirling the fluid. The merging can be done without difficulty, and not only the maintenance is easy. The noise during drainage is also reduced.

[Brief description of drawings]

FIG. 1 is a conceptual diagram of a building drainage system.

FIG. 2 is a side view showing an example of the joint of the present invention.

FIG. 3 is a cross-sectional view showing a push lock mechanism.

[Explanation of symbols]

2… Floor slab, 3 ... Ventilation tube, 3a ... communication pipe, 4 ... Standpipe, 4a: Reinforced ventilation tube, 4b ... Drainage horizontal main pipe, 5: water supply equipment, 6 ... Drainage pipe (polybutene pipe), 7 ... fittings, 7a: funnel-shaped lower end, 7b ... Circulating pipe, 7c ... Drainage storage section, 20 ... Push lock mechanism, 21 ... Socket, 22 ... grab ring, 23 ... washers 24 O-ring, 25 ... Cap, 26. Female thread, 27 ... Color.

Claims (9)

[Claims] 1. A drainage stack pipe that penetrates each floor, an equipment drainage pipe that is guided from a water-surrounding device on each floor, and a merging section joint that connects the equipment drainage tube to the drainage stack tube. Is lower than the level of the drainage floor slab, and a vertical velocity component is sufficiently added to the fluid in the equipment drain pipe, and then connected to the joint joint, and a communication pipe for supplying and removing air to the joint joint is provided, A building drainage system characterized by a full siphon flow in the drainage stack. 2. The building drainage system according to claim 1, wherein the merged joint has a drainage reservoir. 3. The building drainage system according to claim 1, wherein the equipment drainage pipe led from the water-related equipment on each floor has a full-flow siphon flow. 4. The construction drainage system according to claim 1, wherein a ventilation pipe is provided and a communication pipe for supplying and removing air is connected to the ventilation pipe. 5. The building drainage system according to claim 1, wherein the drainage stack is connected to a drainage horizontal main pipe for drainage. 6. The building drainage system according to claim 1, wherein all the equipment drainage pipes led from the water supply equipment on each floor have the same diameter. 7. The building drainage system according to claim 1, wherein the equipment drainage pipes led from the water-related equipment on each floor are individually and individually connected to the joint joint. 8. The building drainage system according to claim 6, wherein the instrument drainage pipe is a flexible pipe. 9. The construction drainage system according to claim 7, wherein the flexible pipe is a polybutene pipe.