JP3970059B2 - Connection structure between drain pipe and drain - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention ensures a continuous (continuous) air layer even when a large amount of drainage flows through the drainage pipe when connecting the drainage pipe from the building and the drainage basin provided outside the building. It is related with the connection structure comprised so that the flow of stable drainage could be implement | achieved.
[0002]
[Prior art]
In buildings including 2-story to 5-story mid- and low-rise houses, toilets and washrooms are installed on each floor, and water is appropriately drained from each. For this reason, a drainage side branch pipe is piped for each floor requiring drainage, and connected to toilets, toilets, kitchens, bathrooms, and the like, which are drainage equipment, via appliance drainage pipes. In addition, a drainage main pipe is connected between the upper floor and the first floor, and a drainage horizontal branch pipe connected to each floor is connected to this drainage main pipe to become a drainage horizontal main pipe on the first floor, which is led out of the building. This constitutes the drainage pipe in the building.
[0003]
In addition, a site drain pipe is provided outside the building, and a drainage basin is installed at a predetermined position of the site drain pipe. And the terminal part of the drainage horizontal main pipe of the said drainage pipe provided in the building is connected to the said drainage basin. Accordingly, the drainage flowing through the drainage pipe flows into the site drainage pipe through the drainage basin, and flows from the site drainage pipe through the public pit to the sewer pipe laid outside the site.
[0004]
FIG. 3 shows a general connection structure between a drain pipe and a drain. That is, the drain pipe 51 from the indoor side is extended to the outside through the rising part of the foundation 52 of the building, and the site drain pipe 53 is laid at a position separated from the foundation 52 by a predetermined distance. A drainage basin 54 is provided in the drainage pipe 53. The axial center of the drain pipe 51 and the center of the drainage basin 53 are arranged substantially on the horizontal plane, and the drain pipe 51 is arranged on the upper level and the site drain pipe 53 is arranged on the lower level on the vertical plane. An elbow 55 is attached to the end of the drain pipe 51 downward, and a straight pipe 56 and a horizontal elbow 57 are attached to the elbow 55. In particular, the outlet level of the elbow 57 substantially matches the level of the attachment port 54 a of the drainage basin 54, and both are connected by a straight pipe 58.
[0005]
In the drainage pipe, traps are provided in drainage sources such as toilets, toilets, kitchens, bathrooms, etc., and so-called sealed water is formed in which water having a predetermined height is stored for each trap. Sealing water prevents leaks of drainage odors and insects from entering.
[0006]
Further, when a large amount of drainage flows through a drainage pipe composed of a drainage horizontal branch pipe and a drainage main pipe, the drainage that falls freely in the drainage main pipe diffuses and its surface area increases. For this reason, the air in the pipe is also moved more strongly downward, and as a result, the pressure of the air layer in the drainage pipe is negative on the upper side of the drainage main pipe and positive on the lower side. Since the negative pressure or the positive pressure acts on the sealing water provided in the trap, it may not be able to exhibit the function as the sealing water by causing breakage, so that a ventilation function may be provided on the top of the drainage main pipe, For example, a vent valve is provided for each branch pipe connected to the like.
[0007]
In particular, as shown in FIG. 4 to be described later, when the drainage drops from the drainage horizontal main pipe through the elbow and then joins the drainage basin provided in the site drainage pipe, the flow direction in the elbow is changed. Thus, the drainage of the part may block the air passage, and in this case, the internal pressure upstream of the blocked part may increase.
[0008]
If the building is a three-story or four-story mid- and low-rise apartment, a drainage horizontal branch pipe is connected to each house, and this drainage horizontal branch pipe is connected to a drainage main pipe. The minutes are collected and led to the first floor. Depending on the size of the housing complex, there may be a plurality of drainage mains. This drainage main pipe becomes a drainage horizontal main pipe, and is generally piped outside the building through the foundation and lowered to be connected to the drainage basin. In this case, the drainage pipes are joined at a plurality of places, but in consideration of the simultaneous use rate, pipes having a diameter of about 100 mm to 125 mm are used.
[0009]
In middle- and low-rise apartments, drainage stand main pipes may be piped for each house, but in this case, the problem is that it is not possible to reduce the cost because it takes time and labor to expand the plane space required for piping. If the drainage main pipes of each door are respectively piped under the floor and then penetrated through the foundation, many sleeve holes are formed in the foundation, which causes a problem in assuring the strength of the foundation. Furthermore, in order to avoid this problem, an aesthetic problem arises when the upper floor drain pipe is piped along the outside of the outer wall.
[0010]
However, these problems are caused by collecting drainage from multiple locations in the drainage main pipe, passing the collected drainage pipe under the floor of the building, and then penetrating the foundation to connect to the drainage basin provided on the site drainage pipe. It is solved by doing.
[0011]
In particular, indoor plumbing technology consisting of a drainage main pipe and drainage side branch pipe inside the building, and outdoor piping technology consisting of a site drainage pipe and drainage basin at the outer periphery of the building, each has many technologies. Has been established as a piping technology that has accumulated.
[0012]
[Problems to be solved by the invention]
A conventional drainage pipe that collects drainage from multiple locations through a drainage standpipe, passes a drainage horizontal mainpipe provided under the floor on the first floor through the foundation, and then lowers it to connect to a drainage basin With this structure, when a large amount of drainage flows at a time, there is a problem that the internal pressure of the drainage lateral branch pipe under the first floor rises and so-called breakage of blowing up the sealing water may occur.
[0013]
When such a problem occurs, it is common to solve this problem by increasing the diameter of the drainage main pipe or drainage side branch pipe of the piping system. However, as the pipe diameter increases, it becomes necessary to change the height under the floor on the lowest floor downstream of the flow, or there is a problem of strength reduction due to increasing the diameter of the sleeve hole formed in the foundation. Arise. For this reason, there is a demand for the development of a technique that can prevent the sealing portion from being broken without increasing the pipe diameter in a building such as a house or an apartment house where a plurality of households live together.
[0014]
[Means for Solving the Problems]
In order to construct a drainage pipe that does not cause breakage, even when a large amount of drainage flows through the drainpipe at the same time, the present inventor pursued the cause of breakage and found this cause. The method to eliminate was considered. As a result, although the indoor piping technology and the outdoor piping technology have already been established, the structure of the part connecting the drain pipe from the building and the drainage basin has not been analyzed, and there are several ways to achieve smooth drainage. It turns out that the problem exists.
[0015]
That is, the inventor of the present invention has a structure for connecting a drain pipe and a drain shown in FIG. 3 and constitutes a conventional experimental facility having a typical connection structure, and the behavior of drainage at the connection portion between the two. The structure which can be drained smoothly and surely while preventing the breakage in the equipment connected to the drainage side branch pipe on the first floor by observing the problem and grasping the problem Realized.
[0016]
In the conventional connection structure shown in the figure, when a large amount of drainage is flowed into the drain pipe at a time, the drainage 60 flowing through the drain pipe 51 as shown in FIG. An air passage 62 through which air flows is formed in the upper part of the drainage or a part of the cross section. However, when the drainage 60 that has flowed through the drainage pipe 51 flows into the straight pipe 56 through the elbow 55, the drainage 60 collides with the inner peripheral surface of the large diameter portion of the elbow 55, and then vertically in the straight pipe 56. It has been found that the air passage is blocked by the drainage 60 at the cross-section FF portion of the elbow 55 and the air passage 62 is cut off at the cross-section portion because it falls. 4 conceptually shows the drainage 60 flowing through the drainage pipe 51, and does not represent all examples. However, the basic trend is the same.
[0017]
As a result, the air flowing down the drainage main pipe along with the drainage of the drainage pipe 51 is blocked by the drainage 60 at the section FF and cannot flow downstream, and the section of the elbow 55 The internal pressure of the drain pipe 51 on the upstream side of the blocked part formed in the FF rises, and trap water is sealed in the toilet, washroom, kitchen, bathroom, etc. on the first floor connected to the drain pipe 51. It was found to affect the blowing up.
[0018]
In addition, when the amount of the drainage 60 is small, the cross section EE in the elbow 55 is not blocked by the drainage 60, and the air passage 62 continues on both sides of the drainage 60 in the cross section EE after the elbow 55. It is possible to realize a smooth flow of the air sucked from the ventilation part with the generation of the drainage 60 and the drainage, and the toilet on the first floor connected to the upstream side of the drainage pipe 51, the toilet, There is no breakage in kitchens and bathrooms.
[0019]
As a result of the above experiment, when the drainage flowing from the building to the drainage pipe is joined to the drainage basin, the flow of the suctioned air is secured together with the drainage flow without increasing the internal pressure of the equipment drainage pipe on the first floor. Therefore, they obtained knowledge that smooth and reliable drainage can be realized by preventing breakage in toilets, washrooms, kitchens, bathrooms, etc. on the first floor.
[0020]
Based on the above knowledge, as a result of further experiments with various changes in the connection structure between the drain pipe and the drainage pipe, without increasing the diameter of the drain pipe 51, it is possible to prevent the sealing water from being broken and A connection structure that allows smooth drainage was obtained. In other words, this connection structure ensures that an air flow path is always secured when drainage flows through the piping path, so that even if a large amount of drainage occurs at one time, the diameter of the drain pipe is not increased. It can be smoothly drained by preventing breakage in equipment that generates drainage.
[0021]
Therefore, the present invention for solving the above problems is a connection structure between a drain pipe from a building and a drainage pipe provided on a site drain pipe that is piped on the outer periphery of the building and has a lower water level than the drain pipe. The drainage basin has a main body provided with a water channel connected to a site drainage pipe at the bottom and connected to the terminal end of the drainage pipe, and connected to the main body from the installation high level of the drainage pipe At least a part of the pipe descending to the lower level of the terminal end is an inclined pipe, and the inclined pipe is connected to the end of the drain pipe via an elbow inclined 45 degrees upstream of the site drain pipe. A straight pipe connected to the end of the straight pipe via a 45 degree elbow and parallel to the drainage pipe of the site and connected to the vertical pipe via the elbow. Connect the pipe and connect the straight pipe to the body of the drainage It is those which are connected.
[0022]
In the connection structure between the drainage pipe and the drainage basin (hereinafter simply referred to as “connection structure”), a part of the pipe descending from the high level where the drainage pipe is installed to the low level connected to the main body is inclined pipe. In this case, when the wastewater that has flowed through the drainage pipe flows into the inclined pipe, the drainage flows along the pipe wall on the large-diameter side (outside) of the elbow to change the flow-down direction. For this reason, a space | gap is formed along the pipe wall of the upper side from the small diameter side (inner side) of an elbow, and this space | gap functions as an air path.
[0023]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of the connection structure according to the present invention will be described. The connection structure of the present invention is a drainage system that combines upper and lower drainage generated from a large number of toilets, toilets, kitchens, bathrooms, etc. (hereinafter referred to as drainage sources), such as multi-family houses and mid- and low-rise apartments. In the case of draining to a tub, smooth and reliable drainage is realized by preventing the sealing water in each drainage source from being broken without increasing the diameter of the drainage pipe.
[0024]
That is, when drainage occurs from the upper floor, the internal pressure of the drainage pipe installed on the first floor is prevented from rising by securing the air flow path sucked into the drainage pipe to the drainage basin. Thus, it is possible to hold the sealed water provided in the drainage device arranged on the first floor.
[0025]
For this reason, the connection structure of the present invention is designed so that when connecting drainage pipes and drainage basins from buildings with different installation levels, the drainage pipes have continuous air without drainage clogging. It is made paying attention to whether a road is formed.
[0026]
The drainage pipe connected from the building to the drainage basin is connected with a drainage horizontal pipe that is piped for each floor of the building and a drainage main pipe that runs through each floor in the vertical direction. A plurality of drainage sources including a kitchen and a bathroom are connected. Therefore, although a plurality of drainage sources are connected to the drainage pipe, the number of these drainage sources is not limited in the present invention.
[0027]
The drainage pipe from the building penetrates the rising part of the foundation and is piped from the indoor side to the outdoor side. The installation level of the drain pipe is set lower than the ground level and higher than the laying level of the site drain pipe. For this reason, the drain pipe is buried in the ground at the inside and outside of the foundation, and a drop occurs between the level of the site drain pipe and the connection structure according to the present invention is realized at a portion corresponding to the drop.
[0028]
The site drainage pipe is laid on the outer periphery of the building, and one or more drainage basins are installed at predetermined positions. The end of this site drainage pipe is connected to a public fence, and this connection part is the most downstream and is laid with a predetermined downflow gradient. The drainage basin is provided with a lid at the upper end, and the level of the lid can be matched with the ground level. For this reason, the drainage gutter provided in the site drainage pipe has different dimensions (installation depth) from the position of the lid to the laying level of the site drainage pipe depending on the installation position.
[0029]
Next, an embodiment of the connection structure of the present invention will be described with reference to the drawings. FIG. 1 is a diagram for explaining a connection structure according to the first embodiment. FIG. 2 is a view for explaining the flow of drainage in the connection structure of the first embodiment.
[0030]
First, the connection structure according to the first embodiment will be described with reference to FIGS. In the drawing, the drain pipe 1 is piped from the indoor side to the outdoor side through the rising part of the foundation 2. A plurality of drainage sources (not shown) and a drainage main pipe vertically penetrating each floor of a building (not shown) are connected to the upstream side of the drainage pipe 1 so that drainage from the plurality of drainage sources flows at the same time. It is configured.
[0031]
In the present embodiment, the diameter of the drain pipe 1 is set to 100 mm, which is the same diameter as that of a drain pipe generally used in a conventional detached house.
[0032]
A site drainage pipe 3 is laid along the outer periphery of the building (the outer periphery of the foundation 2), and a drainage basin E is installed at a predetermined position of the site drainage pipe 3. In the present embodiment, the drainage basin E has a basin body 17 serving as a body portion disposed in the lower part.
[0033]
The connection structure of the present embodiment uses a drainage basin E configured to receive the drainage from the drainage pipe 1 in parallel with the site drainage pipe 3, and the piping of the portion connected to the drainage basin E from the drainage pipe 1 is the first described above. While using the inclined pipe D which concerns on 3 Example, the inclination direction of this inclined pipe D is set to the opposite direction to the distribution | circulation direction of the site drainage pipe 3. FIG.
[0034]
The main body 17 of the drainage basin E is provided with connection portions 17a and 17b of the site drainage pipe 3, and a connection portion 17c is provided adjacent to and parallel to the upstream connection portion 17a. The dredge main body 17 is configured so that drainage from the drainage pipe 1 can be merged in parallel with drainage flowing through the site drainage pipe 3. For this reason, the drainage basin E can be installed at a position close to the building.
[0035]
The elbow 10 a attached to the end of the drainage pipe 1 has a posture inclined 45 degrees toward the upstream side of the site drainage pipe 3. A straight pipe 11a is attached to the elbow 10a, and a 45 degree elbow 14 is further attached to the straight pipe 11a, whereby an inclined pipe D is formed. A vertical pipe 15 and an elbow 16 are attached to the lower end of the elbow 14, and a straight pipe 18 is attached by connecting the elbow 16 and the connecting portion 17 c of the rod main body 17.
[0036]
In the connection structure configured as described above, when drainage is transferred from the drain pipe 1 to the inclined pipe D, an air path continuous to the drain pipe 1 and the inclined pipe D is formed.
[0037]
In particular, as shown in FIG. 6, the drainage 12 is accelerated by flowing down the inclined pipe D, and is opposed across the vertical pipe 15 in the portion where the 45 ° elbow 14 transitions to the vertical pipe 15 and the elbow 16. Collide with the pipe wall. At this time, since the flow rate of the drainage 12 is larger than the velocity when flowing through the drainpipe 1 and the flow rate is constant, the sectional area of the drainage 12 with respect to the section of the elbow 14 (in the vertical plane of the drainage 12 flowing down) (Cross-sectional area) is relatively small.
[0038]
Therefore, when traversing the vertical pipe 15, the drainage 12 flows down from the elbow 14 along the outside, and the continuous air passage 13 is formed on one side or both sides without closing the entire cross section of the vertical pipe 15. Is done. Further, when the drainage 12 flows from the vertical pipe 15 through the elbow 16 and the straight pipe 18, the drainage 12 flows down along the pipe wall corresponding to the upstream side of the site drainage pipe 3 of the vertical pipe 15 and elbow 16. Then, it is possible to realize a smooth flow without being blocked by the drainage 12.
[0039]
As described above, when descending from the high level, which is the installation level of the drainage pipe 1, to the low level, which is the laying level of the site drainage pipe 3, it is possible to prevent the pipe from being closed by drainage by inclining a part. Smooth and reliable drainage can be realized.
[0040]
【The invention's effect】
As described in detail above, in the connection structure according to the present invention, at least part of the pipe descending from the installation high level of the drain pipe to the low level connected to the main body is an inclined pipe, and thereby the drain pipe flows. It is possible to guide the wastewater to the inclined pipe while holding the air passage, eliminating fluctuations in the air layer pressure of the drain pipe and preventing the occurrence of breakage in the drainage source connected to the drain pipe. Drainage can be realized.
[Brief description of the drawings]
FIG. 1 is a diagram illustrating a connection structure according to a first embodiment.
FIG. 2 is a view for explaining the flow of drainage in the connection structure of the first embodiment.
FIG. 3 is a view showing a conventional connection structure between a general drain pipe and a drain.
FIG. 4 is a diagram for explaining a problem in a conventional connection structure.
[Explanation of symbols]
E drainage pipe D inclined pipe 1 drainage pipe 2 foundation 3 site drainage pipe 10a elbow 11a straight pipe 12 drainage 13 air channel 14 45 degree elbow 15 vertical pipe 16 elbow 17 桝 body 17a-17c connection 18 straight pipe

Claims (1)

It is a connection structure between a drain pipe from a building and a drainage pipe provided on a site drainage pipe that is piped on the outer periphery of the building and has a lower water flow level than the drainage pipe. And a main body provided with a water channel connected to the end of the drainage pipe, and at least a pipe that descends from a high installation level of the drainage pipe to a lower level of the end connected to the main body A part of the pipe is inclined, and the inclined pipe is composed of a straight pipe connected to an end of the drain pipe through an elbow inclined at 45 degrees upstream of the site drain pipe, and further, an end of the straight pipe A vertical pipe is connected to the vertical pipe via a 45 ° elbow, and a straight pipe arranged parallel to the site drainage pipe and in the same flow direction is connected to the vertical pipe via the elbow. exhaust, characterized in that it is constructed by connecting the parts Connection structure between the tube and catch basins.

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