JP7291044B2 - collective joint system - Google Patents

Description

The present invention relates to a collective joint system.

Conventionally, buildings such as collective housing and office buildings are equipped with collective joint systems such as drainage channels (see, for example, Patent Literature 1). For example, the collective joint system consists of horizontal pipes that collect wastewater on each floor of a building, vertical pipes that allow the collected wastewater to flow downward, and collective joints that connect the horizontal pipes and the vertical pipes. I have.

The collective joint includes a tubular joint body, a horizontal pipe connecting portion provided on the outer peripheral surface of the joint main body, and swirl vanes provided on the inner peripheral surface of the joint main body.
The joint main body is arranged such that the axis extends in the vertical direction. Vertical pipes are connected to the upper end and the lower end of the joint body, respectively. A horizontal pipe is connected to the horizontal pipe connecting portion. The swirl vanes are arranged in a helical shape gradually extending along the circumferential direction from the top to the bottom in a portion of the joint body below the horizontal pipe connecting portion.

Drainage that has flowed into the joint body from the vertical pipe and the horizontal pipe connected to the upper end of the joint body hits the upper surface of the swirl vane and flows spirally along the upper surface of the swirl vane. While the wastewater spirally flows down the joint body of the collection joint, the air in the joint body flows through the space where the wastewater does not flow.
In this way, in the collecting joint system, it is possible to increase the drainage performance, which is the flow rate of the drainage flowing inside while the pressure difference generated inside is suppressed.

Japanese Patent Application Laid-Open No. 2006-037371

However, if the vertical projected area of the swirl vane is increased, the sound generated when the waste water hits the upper surface of the swirl vane becomes louder. On the other hand, if the projected area is reduced, it becomes difficult for the wastewater to flow spirally, which may reduce the drainage performance of the collection joint system.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a collective joint system that suppresses noise generated from swirl vanes while maintaining drainage performance.

In order to solve the above problems, the present invention proposes the following means.
A collective joint system of the present invention includes a collective joint having a joint body formed in a tubular shape and arranged so that an axis thereof extends in a vertical direction; swirl vanes provided on an inner peripheral surface of the joint body; a vertical pipe connected to an end portion of the joint body, wherein the swirl vanes gradually extend toward the first side in the circumferential direction from top to bottom, and the swirl vanes are viewed along the vertical direction. , the swirl vanes are arranged along the circumferential direction on a reference circle passing 10 mm radially inward from the inner peripheral surface of the vertical pipe over a central angle range of 50° or more and 110° or less. It is characterized by

According to this invention, the inventors found that the wastewater becomes a cylinder coaxial with the joint body (hereinafter, the flow of the wastewater in a cylindrical shape is referred to as a cylindrical flow), and the thickness of the water film of this cylindrical flow It was found to flow through the collection joint with a thickness of about 10 mm. By arranging the swirl vane at a position that hits the cylindrical flow where the water film has a high density, the swirl vane can be used efficiently.

If the central angle of the swirl vanes arranged on the reference circle is less than 50°, even if the water hits the surface facing the first side in the circumferential direction of the swirl vanes, it will be difficult for the waste water to flow spirally, resulting in the waste water from the collecting joint. Performance may deteriorate. On the other hand, if the central angle of the swirl vane exceeds 110°, the sound generated when the water hits the surface of the swirl vane facing the first side in the circumferential direction becomes louder.
By arranging the swirl vane at a position that hits the cylindrical flow and setting the center angle of the swirl vane to 50° or more and 110° or less, the sound generated from the swirl vane can be suppressed while maintaining the drainage performance.

Further, in the collective joint system described above, when the inner peripheral surface of the joint body is viewed from the inside in the radial direction so that the connection portion of the inner peripheral surface with the upper end portion of the swirl vane is positioned in front, The angle formed by the swirl vanes with respect to the vertical direction may be 10° or more and 30° or less.
According to the present invention, if the angle is less than 10°, even if the surface of the swirl vane facing the first side in the circumferential direction is hit by the waste water, it is difficult for the waste water to flow spirally. On the other hand, if this angle exceeds 30°, the flow of the wastewater becomes turbulent and the sound generated when the wastewater hits the surface of the swirl vane facing the first side in the circumferential direction becomes louder. The force applied to the swirl vanes increases when By setting this angle to 10° or more and 30° or less, it is possible to suppress the noise generated from the swirl vanes, facilitate the flow of waste water in a spiral shape, and suppress the force exerted on the swirl vanes by the drain water.

According to the collecting joint system of the present invention, it is possible to suppress the noise generated from the swirl vanes while maintaining the drainage performance.

1 is a partially cutaway side view of a collection joint system in accordance with one embodiment of the present invention; FIG. It is a longitudinal cross-sectional view of a lower connecting pipe of the same assembly joint. It is a top view of the same lower connecting pipe. It is a perspective view explaining the flow of the waste water which flows through the same collection joint.

An embodiment of a collective joint system according to the present invention will be described below with reference to FIGS. 1 to 4. FIG.
As shown in FIG. 1 , a collective joint system 1 of this embodiment is used for drainage of a building 101 . The assembly joint system 1 is arranged on each floor through a slab through-hole 102a formed in a floor slab 102 of a building 101. As shown in FIG.

The collecting joint system 1 includes the collecting joint 11 of this embodiment, a vertical pipe 46 and a horizontal pipe 48 .
The collective joint 11 includes a joint body 16 and a horizontal pipe connection portion 41 . The joint main body 16 is formed in a circular tubular shape, and arranged so that the axis O extends along the vertical direction. Hereinafter, the circumferential direction X (see FIG. 3) of the joint body 16 is simply referred to as the circumferential direction X. As shown in FIG.
The joint body 16 includes an upper connection pipe 17 and a lower connection pipe 19 connected to the upper connection pipe 17 via an intermediate pipe 18 .
A lateral pipe connection portion 41 is fixed to the outer peripheral surface of the upper connection pipe 17 . In this embodiment, a plurality of lateral pipe connecting portions 41 are provided on the outer peripheral surface of the upper connecting pipe 17 . A horizontal pipe 48 is connected to the horizontal pipe connecting portion 41 .
A blocking plate 22 is fixed to the inner peripheral surface of the upper connection pipe 17 . The dam plate 22 prevents the waste water from flowing back into the horizontal pipe 48 .
The upper connection pipe 17 is made of vinyl chloride resin or the like.

A vertical pipe connection portion 23 is attached to the upper end portion of the upper connection pipe 17 . The vertical pipe connection portion 23 has a first swirl vane 24 . The first swirl vane 24 is arranged at a position corresponding to the horizontal pipe 48 in the vertical direction.
A vertical pipe 46 is connected to the vertical pipe connection portion 23 . A pipe with an inner diameter of 100 mm is mainly used as the vertical pipe 46 . The outer diameter of the vertical pipe 46 is smaller than the inner diameter of the upper connecting pipe 17 .

For the intermediate pipe 18, for example, Eslon (registered trademark) fire-resistant VP pipe (manufactured by Sekisui Chemical Co., Ltd.) can be suitably used. ESLON refractory VP pipe thermally expands to block the space inside the pipe when a fire occurs, preventing the spread of fire. Alternatively, the intermediate pipe 18 may be made of ordinary resin such as vinyl chloride resin, and a thermal expansion sheet may be wrapped around the outer peripheral surface of the intermediate pipe 18 .
A second swirl vane may be provided on the inner peripheral surface of the intermediate pipe 18 . The upper end of the intermediate pipe 18 is fitted inside the lower end of the upper connecting pipe 17 . A connecting portion between the upper connecting pipe 17 and the intermediate pipe 18 is joined with an adhesive or the like, for example.
As shown in FIG. 1 , the connecting portion between the upper connecting pipe 17 and the intermediate pipe 18 is arranged in the slab through hole 102 a of the floor slab 102 . A mortar 103 is filled in the slab through-hole 102a.

As shown in FIGS. 2 and 3, the lower connection pipe 19 includes a connection pipe portion 31, an inclined pipe portion 32, a lower pipe portion (vertical pipe connection portion) 33, and a third swirl vane (swirl vane) . and have. In addition, FIG. 3 is a view of the lower connection pipe 19 as viewed in the vertical direction (planar view).
2, as shown in FIG. 3, the inner peripheral surface of the inclined pipe portion 32 is arranged in the radial direction so that the connection portion 32a of the inner peripheral surface with the upper end portion of the third swirl vane 34 is positioned in front. It is the figure seen from the inside in the direction of arrow B1.

The connection pipe portion 31 is formed in a cylindrical shape and is fitted to the outside of the lower end portion of the intermediate pipe 18 (see FIG. 1). The connecting pipe portion 31 is joined to the intermediate pipe 18 by, for example, an adhesive.
The inclined tube portion 32 is formed in a cylindrical shape, and is formed such that the outer diameter and the inner diameter gradually decrease from the top to the bottom. That is, the inclined tube portion 32 is tapered.
The inclined tube portion 32 is arranged coaxially with the connection tube portion 31 . The upper end portion of the inclined pipe portion 32 is fixed to the inner peripheral surface of the lower end portion of the connection pipe portion 31 . The upper end of the inclined tube portion 32 is in contact with the lower end of the intermediate tube 18 from below the intermediate tube 18 (see FIG. 1).

The lower tube portion 33 is formed in a cylindrical shape. The lower tube portion 33 is arranged coaxially with the inclined tube portion 32 . The upper end portion of the lower tube portion 33 is fixed to the outer peripheral surface of the lower end portion of the inclined tube portion 32 . A vertical pipe 46 is connected to the lower pipe portion 33 .
Thus, the vertical pipes 46 are connected to the upper end and lower end of the joint body 16, respectively. Both vertical tubes 46 are arranged coaxially.

The third swirl vane 34 is fixed to a portion of the inner peripheral surface of the inclined tube portion 32 below the horizontal tube connecting portion 41 (see FIG. 1). As shown in FIG. 3, the third swirl vane 34 gradually extends toward the first side X1 in the circumferential direction X from above to below. Note that the connection portion 32a described above may be a connection portion (intersection point) between the inner peripheral surface of the inclined tube portion 32 and the upper end portion of the surface 34a of the third swirl vane 34 facing the first side X1 in the circumferential direction X. good.
As shown in FIG. 2, the angle .theta.1 formed by the connection portion 32a with respect to the vertical direction is 22.degree. Here, the connecting portion 32a may be a tangent line at the connecting portion 32a. The angle θ1 is preferably 10° or more and 30° or less.
In FIG. 3, a reference circle C passing radially inward by 10 mm from the inner peripheral surface 46a of the vertical tube 46 is defined. The reference circle C and the inner peripheral surface 46a of the vertical tube 46 are arranged coaxially.
The third swirl vanes 34 are arranged along the circumferential direction X on the reference circle C over the range of the central angle θ2 in the plan view shown in FIG. 3 . The central angle θ2 is 83°. The central angle θ2 is preferably 50° or more and 110° or less.

The connection pipe portion 31, the inclined pipe portion 32, the lower pipe portion 33, and the third swirl vane 34, which constitute the lower connection pipe 19, are integrally formed by, for example, injection molding of vinyl chloride resin or the like.
The joint body 16 is composed of three members, an upper connecting pipe 17 , an intermediate pipe 18 and a lower connecting pipe 19 . Note that the joint body may be composed of two or four or more members, or the joint body may be integrally composed of one member.
Moreover, the upper connection pipe 17 and the lower connection pipe 19 may be made transparent. Thereby, the connection state of the upper connecting pipe 17 and the lower connecting pipe 19 can be visually recognized from the outside. In addition, the upper connection pipe 17 and the lower connection pipe 19 may be blended with a flame retardant such as non-thermally expandable graphite, aluminum hydroxide, and magnesium hydroxide.

A sound insulation cover may be provided on the outer peripheral surface of the joint body 16 as a measure for sound insulation. The sound insulation cover is formed of, for example, a sheet of soft vinyl chloride, butyl rubber, or polypropylene (PP) resin having a thickness of 0.8 to 2 mm. The sound insulation cover may be a laminate in which a layer of polyester fiber, urethane foam, or glass wool having a thickness of 5 to 20 mm is provided inside the above sheet.

Also, the intermediate pipe 18 may be omitted.
In that case, the upper connecting pipe 17 and the lower connecting pipe 19 are directly connected. When the connecting pipe portion 31 at the upper end of the lower connecting pipe 19 is a socket, the lower end of the upper connecting pipe 17 is used as a spigot and inserted into the lower connecting pipe 19 . When the connecting pipe portion 31 at the upper end of the lower connecting pipe 19 is a spigot, the lower end of the upper connecting pipe 17 is used as a socket, and the lower connecting pipe 19 is inserted into this lower end.
In these cases, a sheet-like refractory material (hereinafter also referred to as a refractory sheet) can be wrapped around the connecting portion between the upper connecting pipe 17 and the lower connecting pipe 19 . In this case, the refractory sheet is wound around portions of the upper connection pipe 17 and the lower connection pipe 19 that are positioned below the horizontal pipe connection portion 41 . In the case where the lower connection pipe 19 is wrapped with a refractory sheet, the outer surface of the lower connection pipe 19 in the range where the third swirl vane 34 exists is directed radially inward from the viewpoint of formability, for example. It is difficult to wrap the fireproof sheet in this range when denting. In this case, it is preferable to wrap the fireproof sheet around the area of the lower connection pipe 19 where the third swirl vane 34 does not exist. On the other hand, if a protrusion projecting radially outward is provided in the recess, the fireproof sheet can be supported from the radially inner side by the protrusion. Therefore, the fireproof sheet may be wound up to the position where the third swirl vane 34 is located in the lower connecting pipe 19 .

The inventors conducted an experiment using this assembly joint. This experiment was conducted in accordance with SHASE (Standards of the Society of Heating, Air-Conditioning and Sanitary Engineers)-S218 (2014), a method for testing the drainage capacity of drainage stack systems in collective housing. Based on this regulation, when the flow rate of the waste water is set to 6.5 L/s (liters per second), it was found that the falling speed of the waste water is about 2.6 m/s by actual measurement.
At this time, the inventors found that the waste water L formed a cylindrical shape coaxial with the joint body 16 and flowed through the collection joint 11 as shown in FIG. called cylindrical flow). 4 shows the positional relationship between the drainage L and the third swirl vane 34. As shown in FIG.

The outer diameter of the cylindrical flow is about 100 mm, which is the same as the outer diameter of the vertical tube 46 . The cross-sectional area perpendicular to the axis of the cylindrical flow is 2500 mm ² from the formula (1).
6.5×10 ⁶ (mm ³ /s)/(2.6×10 ³ (mm/s))
= 2500 mm ² (1)
Assuming that the inner diameter of the cylindrical flow is D (mm), the formula (2) holds.
π(100/2) ² −π(D/2) ² =2500 (2)
Therefore, it was found that the inner diameter D was approximately 82.6 mm and the thickness of the water film in the cylindrical flow was approximately 10 mm. By arranging the third swirl vane 34 at a position that hits the cylindrical flow where the water film has a high density, the third swirl vane 34 can be used efficiently.

If the center angle θ2 of the third swirl vane 34 arranged on the reference circle C is less than 50°, even if the waste water L hits the surface 34a of the third swirl vane 34, it will be difficult for the waste water L to flow in a spiral shape and collect. There is a possibility that the drainage performance of the joint 11 may deteriorate. On the other hand, when the central angle θ2 of the third swirl vane 34 exceeds 110°, the sound generated when the drainage L hits the surface 34a of the third swirl vane 34 becomes louder.
According to the collective joint system 1 of the present embodiment, the third swirl vane 34 is arranged at a position that hits the cylindrical flow, and the central angle θ2 of the third swirl vane 34 is set to 50° or more and 110° or less, Sound generated from the third swirl vane 34 can be suppressed while maintaining drainage performance. As a result, the size of the third swirl vane 34 can be reduced.

The angle θ1 formed by the connecting portion 32a with respect to the vertical direction is preferably 10° or more and 30° or less. If the angle θ1 is less than 10°, even if the surface 34a of the third swirl vane 34 is hit by the waste water L, it is difficult for the waste water L to flow spirally. On the other hand, when the angle θ1 exceeds 30°, the flow of the waste water L becomes turbulent, and the noise generated when the waste water L hits the surface 34a of the third swirl vane 34 becomes louder, and the waste water L hits the surface 34a. Sometimes the force to which the third swirl vane 34 is subjected is increased. By setting the angle θ1 to 10° or more and 30° or less, the sound generated from the third swirl vane 34 is suppressed, the waste water L is easily discharged in a spiral shape, and the force exerted on the third swirl vane 34 by the waste water L is suppressed. be able to.

In addition, in the collective joint 11 of the present embodiment, the angle θ1 formed between the connection portion 32a and the axis O may be less than 10° or may exceed 30°.

As described above, one embodiment of the present invention has been described in detail with reference to the drawings, but the specific configuration is not limited to this embodiment, and the configuration can be changed, combined, or deleted without departing from the scope of the present invention. etc. are also included.
For example, in the above-described embodiment, the third swirl vane 34 may be arranged between the reference circle C and the inner peripheral surface 46a of the vertical pipe 46 and over the range of the central angle θ2 along the circumferential direction X. good. With this configuration, the third swirl vane 34 can more efficiently hit the cylindrical flow with a high density water film.
The collective joint 11 does not have to include the vertical pipe connection portion 23 and the horizontal pipe connection portion 41 .
The position where the swirl vanes are provided in the joint main body 16 is not particularly limited, and may be the same position as the horizontal pipe connecting portion 41 in the vertical direction.
It is assumed that the joint main body 16 is formed in a circular tubular shape. However, the shape of the joint main body is not limited to this, and the joint main body may be formed in an elliptical tubular shape, a square tubular shape, or the like.

In the above-described embodiment, in the lower connection pipe 19, the connection pipe portion 31 and the lower pipe portion 33 are sockets, but either one of them may be a spigot, or both of them may be a spigot. When the connection pipe portion 31 and the lower pipe portion 33 are used as spigots, the connection pipe portion 31 and the lower pipe portion 33 are straight pipes. In this case, the inner diameter and outer diameter of the connecting pipe portion 31 are substantially the same as the inner diameter and outer diameter of the inclined pipe portion 32 at the upper end of the third swirl vane 34 . The inner and outer diameters of the lower tube portion 33 are substantially the same as the inner and outer diameters of the inclined tube portion 32 at the lower end of the third swirl vane 34 .
When the connecting pipe portion 31 is a spigot, the intermediate pipe 18 can be omitted and the connecting pipe portion 31 can be inserted into the lower end (receptacle) of the upper connecting pipe 17 as described above.
In the above-described embodiment, the position of the third swirl vane 34 is the same as that of the connecting pipe portion 31 so as not to interfere with the intermediate pipe 18 and the vertical pipe 46 that are inserted into the connecting pipe portion 31 and the lower pipe portion 33 as sockets. It was provided inside the inclined tube portion 32 between the lower tube portions 33 . However, by using the connection pipe portion 31 and the lower pipe portion 33 as spigots, the upper end position of the third swirl vane 34 can be provided inside the connection pipe portion 31, or the lower end position of the third swirl vane 34 can be positioned on the lower side. A third swirl vane 34 can be provided inside the pipe portion 33 or can be provided from the connection pipe portion 31 to the lower pipe portion 33 . That is, the degree of freedom of the installation position of the third swirl vane 34 can be improved. In addition, since the third swirl vane 34 overlaps with the connection pipe portion 31 and the lower pipe portion 33, even if the center angle θ2 of the third swirl vane 34 is increased to 50° or more, the entire length of the lower connection pipe 19 remains unchanged. can be shortened and the entire assembly joint 11 can be made smaller to improve fit.

In addition, it is possible to appropriately replace the constituent elements in the above-described embodiment with well-known constituent elements without departing from the spirit of the present invention, and the modifications described above may be combined as appropriate.

(Example)
EXAMPLES The present invention will be described in more detail below by specifically showing examples and comparative examples, but the present invention is not limited to the following examples.
As shown in Table 1, assembly joints of specifications 1 to 5 were produced.
In the assembly joint of specification 1, the central angle θ2 of the third swirl vane 34 on the reference circle C was 48°, and the angle θ1 between the connecting portion 32a and the axis O was 13°. Similarly, in the assembly joint of specification 2, the central angle θ2 was 60° and the angle θ1 was 35°. In the assembly joint of Specification 3, the central angle θ2 was 60° and the angle θ1 was 18°. In the assembly joint of Specification 4, the central angle θ2 was 80° and the angle θ1 was 22°. In the assembly joint of Specification 5, the central angle θ2 was 100° and the angle θ1 was 28°.

Using these specification 1 to specification 5 assembly joints, a test was conducted based on the above-mentioned SHASE-S218 (2014), Drainage Capacity Test Method for Drainage Stack System of Collective Housing.
Table 1 shows the drainage performance test results for each specification.

The collection joint of specification 1 had a drainage performance of 5.5 L/s. Similarly, the collection joints of specifications 2, 3, 4 and 5 had drainage performances of 6.0 L/s, 6.5 L/s, 7.0 L/s and 6.5 L/s, respectively.
A set joint of specification 1 in which the central angle θ2 is less than 50° is a comparative example, and a set joint of specifications 2 to 5 in which the central angle θ2 is 50° or more and 110° or less is an example.
It was found that the assembly joints of the examples of specifications 2 to 5 had higher drainage performance than the assembly joint of the comparative example.

1 collecting joint system 11 collecting joint 16 joint body 32a connection portion 34 third swirl vane (swirl vane)
46 Vertical tube C Reference circle O Axis X Circumferential direction X1 First side θ1 Angle θ2 Central angle

Claims (2)

a collective joint having a joint body formed in a tubular shape and arranged so that an axis thereof extends in the vertical direction; and swirl vanes provided on an inner peripheral surface of the joint body;
a vertical pipe connected to the end of the joint body;
with
The swirl vane gradually extends toward the first side in the circumferential direction as it goes downward from above,
When the swirl vanes are viewed in the vertical direction, the swirl vanes are placed on a reference circle that passes 10 mm radially inward from the inner peripheral surface of the vertical pipe and has a central angle of 50° or more in the circumferential direction. Collective joint system arranged over a range of 110° or less. When the inner peripheral surface of the joint body is viewed from the inside in the radial direction so that the connection portion of the inner peripheral surface to the upper end portion of the swirl vane is located in front, the swirl vane is positioned vertically. 2. The collective joint system according to claim 1, wherein the angle formed is 10[deg.] or more and 30[deg.] or less.

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