JP6242124B2 - Synthetic resin drainage joints - Google Patents

Description

  The present invention relates to a pipe joint interposed in a drainage vertical pipe of a building or a structure such as an apartment house, a hospital, a hotel, or an office building, and more specifically, to join the drainage of a horizontal branch pipe to the drainage vertical pipe. This relates to a pipe joint made of synthetic resin having two branch pipe connection ports.

Conventionally, a junction pipe joint with a branch pipe connection port is interposed in the middle of a drainage vertical pipe that passes vertically through a building or structure, and drainage of each floor is drained from the horizontal branch pipe to the vertical pipe via the pipe joint. To be done. The pipe joint is normally embedded in a through-hole opened in the floor slab, and the lateral branch pipe is piped along the floor surface to a bathroom or a toilet.
As this type of joint, a swirl vane is provided inside to swirl the drainage, and the drainage flows down while swirling along the inner wall of the vertical pipe to form an air core in the vertical pipe, preventing clogging of water A single-pipe drainage pipe joint having a configuration that improves drainage capacity by doing so is known. These pipe joints are made of cast or fire-resistant double-layer pipes with a synthetic resin inner pipe covered with mortar, both of which have good fire resistance, and cast ones are heavy but complex However, the structure with a fireproof double-layer tube is difficult to form a complicated shape because the inner tube is made of a synthetic resin, but the drainage flow is smooth and lightweight.

When this type of pipe joint has a small outer diameter, it is desirable to reduce the diameter of the through-hole provided in the floor slab, so it is desirable to reduce the outer diameter. However, the portion where the branch pipe connection port of the joint is provided is a horizontal branch pipe. It is not easy to reduce the diameter of the joint because it is necessary to increase the inner diameter in order to prevent the air core from disappearing due to the waste water flowing in from. In apartment houses, etc., two horizontal branch pipes are often required. In such a case, since two branch pipe connection ports are provided, the amount of water flowing into the joint also increases. It needs to be expanded.
In addition, when two branch pipe connection ports are provided, there is a disadvantage that the waste water flowing in from one side branch pipe flows back to the other side branch pipe. Are provided at four locations at intervals of 90 °. When the outer diameter of the joint is small, the openings of the branch pipe connection ports are close to each other and the back flow tends to increase. Therefore, in order to obtain an effective backflow prevention effect, the backflow prevention plate projects in the direction of the joint central axis. Although it is necessary to increase the height, it is not easy to reduce the outer diameter of the joint body because the height is disadvantageous in that noise, piping clogging, and drainage capacity are reduced.

The applicant previously provided two branch pipe connection ports arranged at intervals of 90 ° in the horizontal direction, has a drainage capacity of 7.5 L / sec suitable for a 20-story building, and has an outer diameter. Proposed a slim joint (Japanese Patent Laid-Open No. 2011-117133). In order to make the joint 6 slim without impairing the drainage capacity, as shown in FIGS. 1 and 2, the joint body 1 is provided with swirl vanes 2 and 2 in two upper and lower stages, and an intermediate portion of the joint body 1. The backflow prevention plate 3 and the guide ridge 7 are provided at four locations in 4.
However, in this proposal, the outer diameter of the joint body 1 can be reduced to about 20% of the vertical pipe 9, but the axial direction of the joint body can be obtained by arranging the upper and lower swirl blades 2, 2. The length of the joint becomes as long as about 625 mm, and the entire joint is not miniaturized.
On the other hand, in a low-rise building of 10 stories or less, it is only necessary to have a drainage capacity of about 5.5 L / sec, but if the outer diameter and length of the joint can be reduced without impairing this drainage performance, It is possible to drain water with sufficient performance by installing it in a narrow space, and it is possible to obtain the merit that it is small and light and easy to carry and work. In addition, when two branch pipe connection ports are provided, if these are arranged facing each other, drainage directly jumps from one branch pipe connection port to the other branch pipe connection port. Usually, two branch pipe connection ports are provided and a backflow prevention plate is provided at four locations in the joint body to prevent backflow.

JP 2011-117133 A

  The present invention makes use of the characteristics of a drainage pipe joint made of synthetic resin that can be drained smoothly and lightweight, and has a 10-story structure that is short not only in the outer diameter of the joint but also in the longitudinal direction of the joint, and is small overall and has good drainage performance. It is an object of the present invention to provide a synthetic resin drainage junction pipe joint suitable for the following relatively low-rise buildings.

In order to solve the above-described problems, in the present invention, two branch pipes having a vertical pipe connection port at the top and bottom and having a horizontal branch pipe connected to an intermediate portion formed to have a diameter 20% to 25% larger than that of the vertical pipe. A guide tube for guiding the flow of drainage toward the inner wall of the joint body is provided in the synthetic resin tube-shaped joint body having a connection port, which is located above the branch pipe connection port, and its lower end edge is connected to the branch body. An inclined swirl vane is provided in the joint body to give swirl to the drainage and is positioned above the upper end position of the opening of the pipe connection port, and the two branch pipe connection ports are disposed around the axis of the joint body. In a drainage confluence pipe joint of the type in which a backflow prevention plate is provided that is arranged at intervals and extends vertically on both sides of the branch pipe connection port to prevent the backflow of drainage to the branch pipe connection port. Only one piece is provided below the branch pipe connection port, and when viewed from a plane, And disposed within the opening at the opening side of the pieces of the branch pipe connecting port does not protrude to the diameter of the guide tube as viewed from plane projection height of the fitting body center of the reverse flow prevention plate height A total of three sheets were formed on each side of the branch pipe connection port, and the upper end of each backflow prevention plate was cut obliquely so that drainage could get over. The distance from the lower end of the joint body to the axis of the horizontal branch pipe may be 310 mm or less.

Drainage flowing from the upper vertical pipe flows in a cylindrical state with an air core maintained in the pipe along the guide tube, and is guided to spread toward the inner wall of the joint body at a position below the branch pipe connection port. The The protruding height of the backflow prevention plate is such that it does not protrude into the diameter of the guide tube, so this cylindrical drainage state is maintained until it hits the inner wall of the joint pipe, and then flows down along the inner wall, It becomes a swirl flow in which an air core is formed in the pipe and flows out from the lower vertical pipe.
When drainage flows from the branch pipe connection port connecting the horizontal branch pipes in such a flow-down state, it collides with the cylindrical drainage flowing down from the vertical pipe, and the drainage from the horizontal branch pipe is combined with this cylindrical drainage. The drainage space between the inner part and the inner surface of the middle part flows down and swirls together with the drainage from the vertical pipe by the swirling blades below, so that it is discharged from the lower vertical pipe connection port so that an air core is formed in the joint and drainage. There will be no fluctuations in the pipe pressure that would reduce the capacity. In this case, even if the amount of inflow from the side branch pipe is large and the drainage space is filled with drainage from the side branch pipe, if the upper end of the backflow prevention plate is cut diagonally, it will go over the cut part. Since the drainage of the part flows into the adjacent drainage space, the drainage from the side branch pipe is performed quickly.
In addition, when drainage flows from these branch pipe connection ports when there is little drainage flowing from the side branch pipes, there are only three backflow prevention plates on both sides of the branch pipe connection ports. Since it is not provided on the opposite side , and there are no swirl vanes below the opposite side, the drainage from the branch pipe connection port flows quickly along the inner wall on the opposite side without being blocked by the backflow prevention plate. Since the swirl is provided by the lower swirl vane, the air core in the joint main body is maintained, and the pressure in the joint main body is lower than that of a conventional backflow prevention plate having four upper and lower swirl vanes. In addition, the fluctuation range of the pressure is relatively small, and the drain trap is not destroyed. The outer diameter of the joint body is about the same as that of the conventional one, but only one swirl vane is required below the branch pipe connection port, so the axial length of the joint body is greatly reduced, A compact and lightweight product can be obtained, and the structure of the joint body is relatively simple, making it convenient for molding with synthetic resin and obtaining a drainage capacity of about 5.5 L / sec. Can do.

Cutting side view of conventional synthetic resin drainage junction pipe joint Sectional plan view of line 2-2 in FIG. Overall side view of an embodiment of the present invention Sectional view along the page of FIG. Sectional plan view taken along line 5-5 in FIG. Diagram showing pressure change in the joint body of the present invention when drainage is introduced from the branch pipe connection port 2a The diagram which shows the pressure change in the coupling main body of this invention when the waste_water | drain which flows in from a vertical pipe is increased rather than the case of FIG. Explanatory drawing of the structure when the position of the swirl vane is installed on the opposite side of the branch pipe connection port FIG. 8 is a diagram showing the pressure change in the joint body in the case of FIG. Explanatory drawing of the structure when backflow prevention plates are installed at four locations at 90 ° intervals Schematic showing the pressure change in the joint body in the case of FIG. Explanatory drawing of the flow in the joint body

  An embodiment of the synthetic resin drainage junction pipe joint of the present invention will be described with reference to FIGS. 3 and 4. Reference numeral 1 includes vertical pipe connection ports 8 a and 8 b on the upper and lower sides and a vertical pipe 9 a connected thereto. A cylindrical joint body made of synthetic resin having two branch pipe connection ports 5a and 5b to which the side branch pipe 10 is connected is shown in the intermediate part 4 formed to have a diameter 20% to 25% larger than 9b. . In the joint body 1, a lower end edge 11 is located above the opening of the branch pipe connection ports 5 a and 5 b, and a guide cylinder 12 is provided to guide the flow of drainage toward the inner wall of the joint body 1. An inclined half-moon-shaped swirl blade 2 for swirling the drainage is provided in the funnel-shaped portion up to the lower vertical tube connection port 8b. The two branch pipe connection ports 5a and 5b are arranged at intervals of 90 ° around the axis of the joint body 1 and extend vertically on both sides of the branch pipe connection ports 5a and 5b to drain into the branch pipe connection ports. A backflow prevention plate 3 is provided for preventing backflow.

Although the above configuration is not particularly different from that described in Patent Document 1, in the present invention, the swirl blade 2 is only one sheet positioned below the branch pipe connection ports 5a and 5b. In addition, when viewed from above, the two branch pipe connection ports are arranged on the opening side of the two branch pipe connection ports and within the range of the openings, and the backflow prevention plates 3 are added one on each side of the branch pipe connection ports 5a and 5b. Three of the backflow prevention plates 3 are provided so that the protrusion height 13 in the center direction of the joint body 1 is formed so as not to protrude into the diameter of the guide tube 12 when viewed from the plane of the joint body 1 . The upper end was cut obliquely 17 so that drainage could get over .

No swirl vane as seen in conventional synthetic resin joints is provided between the upper vertical pipe connection port 8a and the branch pipe connection ports 5a and 5b. The guide cylinder 12 is only provided to guide the waste water to diffuse below the branch pipe connection ports 5a and 5b in the direction of the inner wall of the joint body. The distance from the vertical pipe connection port 8a to the central axis of the branch pipe connection ports 5a, 5b can be made shorter than the conventional one by the vertical length of the swirl vane.
In the present invention, the swirling blade is reduced by one as compared with the conventional one having two swirling blades on the upper and lower sides described in Patent Document 1, so that the swirling force of the drainage is reduced, the air core is reduced, and the inside of the joint is reduced. It was thought that a large negative pressure was generated and the drainage capacity was greatly reduced. However, as in the present invention, the backflow prevention plate 3 has a height that does not protrude into the diameter of the guide tube 12, and a total of three are provided on both sides of the branch pipe connection ports 5a and 5b. The drain wall flowing in from each branch pipe connection port is divided into left and right along the curved surface of the joint inner wall surface on the opposite side. Since there is a backflow prevention plate 3 on the side where there is, the flow in that direction is blocked, and most of the drainage is directed in the opposite direction without the backflow prevention plate, and the backflow prevention action appears remarkably. The drainage that collides with the inner wall surface on the opposite side flows so as to quickly return to the lower side of the branch pipe connection port along the pipe wall having no protrusions, and then turns into the swirl flow on the swirl vane 2. Also, when drainage flows from the branch pipe connection port connecting the horizontal branch pipe when drainage flows from the upper vertical pipe, it collides with the cylindrical drainage flowing from the vertical pipe and drains from the horizontal branch pipe. Flows down the drainage space between the cylindrical drainage and the inner surface of the joint intermediate part 4, and is discharged from the lower vertical pipe connection port 8b while swirling together with the drainage from the vertical pipe by the swirling blade 2 below. . Therefore, in the present invention, an air core is generated in the joint, and no large negative pressure is generated in the pipe, so that the drainage capacity is not significantly reduced.

  Since the synthetic resin joint body 1 is molded by a mold, it cannot be manufactured in a complicated shape such as a cast one, but the above shape is relatively simple with a small number of backflow prevention plates. Because of its structure, it can be molded with a mold.

A specific embodiment of the present invention will be described. The synthetic resin joint 6 having the configuration shown in FIG. 4 has longitudinal pipe connection ports 8a and 8b to which longitudinal pipes 9a and 9b having an inner diameter of 100 mm can be connected. Is 480 mm, and has two branch pipe connection ports 5 a and 5 b at 90 ° intervals for connecting the lateral branch pipes 10 and 10 having an inner diameter of 77 mm. The inner diameter of the guide tube 12 is 102 mm, its lower end edge is located 11 mm above the branch pipe connection ports 5a and 5b, and the length from the opening center of the branch pipe connection ports 5a and 5b to the lower end edge of the joint body 1 is 310 mm. The protrusion height 13 of the backflow prevention 3 is set to 11 mm which does not protrude into the diameter of the guide tube 12 when viewed from the plane of the joint body 1. The inner diameter of the intermediate part 4 is 124 mm, and this dimension is the same as the conventional one. This joint 6 is installed on all floors of a 10-story building, and as drainage experiment 1, the vertical pipe 9a is 10L, 2.5L / sec from the 9th floor, and 0.5L / sec from the 8th floor, totaling 5.5L. / Sec was simultaneously drained quantitatively, and the change in the pressure in the joint on the seventh floor was measured. As a result, it was within the range of 0 to -250 Pa as shown in FIG. In addition, as drainage experiment 2, a total of 5.1 L / sec of 1.7 L / sec is simultaneously flowed from the toilets on the 10th floor, 9th floor, and 8th floor into the vertical pipe 9a to change the pressure in the joint on the 7th floor. When measured, it was within the range of +50 to −100 Pa as shown in FIG.
For comparison, as in the drainage experiment 1, the vertical pipe 9a was simultaneously drained quantitatively for a total of 5.5 L / sec, 2.5 L / sec from the 10th floor, 9th floor, and 0.5 L / sec from the 8th floor. The dimensions of 6 are the same as in FIG. 4, but as shown in FIG. 8, when the swirl vane 2 is moved 180 ° opposite to FIG. It became like FIG. When this is compared with FIG. 6 of the present invention, the negative pressure is reduced in the present invention, and the swirling blade 2 is only one sheet positioned below the branch pipe connection ports 5a and 5b. It can be seen that better results can be obtained if this is arranged in the middle of the two branch pipe connection ports as seen from the plane. Further, as shown in FIG. 10, the pressure change when the four backflow prevention plates 14 are added and provided at intervals of 90 ° is as shown in FIG. 11, and FIG. The pressure was relieved. Therefore, by adopting the configuration of FIG. 4 of the present invention, the overall diameter of the joint is shortened by 150 mm or more even if the outer diameter of the joint is the same as the conventional one, and the drainage capacity is adapted to a 10-story building. Therefore, a synthetic resin drainage confluence pipe joint that is small and does not take an installation place can be obtained.

  In the embodiment of FIG. 4, the inner diameter of the intermediate portion 4 of the joint body 1 is formed to be 20% larger than that of the vertical pipes 9a, 9b. Obtained.

  Further, the waste water flowing from the upper vertical tube 9a flows along the guide tube 12 with the air core maintained in the tube, and toward the inner wall of the joint body 1 at a position below the branch pipe connection ports 5a and 5b. Since it is guided so as to expand, the drainage in the air core state is cylindrical, and the drainage from the side branch pipe 10 is prevented. At this time, if drainage flows simultaneously from the branch pipe connection ports 5a and 5b connected to the side branch pipe 10, the space from which the drainage from the side branch pipe 10 can flow down from the vertical pipe as shown in FIG. This is a portion formed by the cylindrical drainage 15 expanding from the guide cylinder 12, the inner surface of the intermediate portion, and the backflow prevention plate 3, and this is the drainage space 16, but the amount of drainage flowing from the side branch pipe If there is a large amount, there is a possibility that the drainage space 16 will not flow out and the inside of the side branch pipe 10 will be filled with water, i.e., it will become clogged, and in order to eliminate this inconvenience, the upper end of each backflow prevention plate 3 is cut 17 obliquely. When the horizontal branch pipe was clogged because it could not flow from the drainage space 16, it was prevented from getting over the cut 17 portion and flowing into the adjacent space. As shown in FIG. 4, it is preferable that the cut portion 17 is cut obliquely upward from 15 mm from the center of the lateral branch tube 10, and the cut portion is cut from 20 mm above the center, for example. When the cut was small, the side branch pipe 10 was easily clogged, and conversely, when the cut part was large, there was an inconvenience of backflowing to the adjacent side branch pipe.

  The synthetic resin pipe joint of the present invention can be added in configuration according to the purpose of use. For example, when used in a place requiring fire resistance, a fiber-mixed mortar is provided on the outer peripheral surface of the joint body 1. If a fireproof is not required but there is a demand to prevent drainage noise, soundproofing with a sound insulation material and a vibration insulation material overlaid on the outer peripheral surface of the joint body 1 It is possible to wrap the material and use it.

  DESCRIPTION OF SYMBOLS 1 Joint body, 2 Swirling blade, 3 Backflow prevention plate, 4 Middle part, 5 * 5a * 5b Branch pipe connection port, 6 Joint, 8a * 8b Vertical pipe connection port, 9a * 9b Vertical pipe, 10 Horizontal branch pipe, 11 Lower edge, 12 guide tube, 13 protruding height, 17 diagonal cut

Claims (2)

A cylindrical tube made of a synthetic resin having two vertical pipe connection ports with vertical pipe connection ports at the top and bottom and two branch pipe connection ports connected to a horizontal branch pipe at an intermediate portion formed to have a diameter 20% to 25% larger than the vertical pipe. A guide tube is provided in the joint body above the branch pipe connection port to guide the flow of drainage toward the inner wall of the joint body, and the lower end edge thereof is positioned above the upper end position of the branch pipe connection port. And an inclined swirl vane for swirling the drainage in the joint body, and the two branch pipe connection ports are arranged at intervals of 90 ° around the axis of the joint body, In a drainage junction pipe joint that is provided with a backflow prevention plate that extends in the vertical direction and prevents backflow of drainage to the branch pipe connection port, the swirl vane is provided below the branch pipe connection port. and opening as viewed from the plane opening portion side of the two branch pipes connecting port so as to only one was Place in the range, the total one on each side of the branch pipe connecting port of the protrusion height of the fitting body center direction is formed at a height that does not protrude into the diameter of the guide tube as viewed from the plane of the reverse flow prevention plate 3 A synthetic resin drainage junction pipe joint, characterized in that a sheet is provided and is cut obliquely so that drainage can get over the upper end of each backflow prevention plate . The synthetic resin drainage merge pipe joint according to claim 1, wherein the distance from the lower end of the joint body to the axis of the horizontal branch pipe is 310 mm or less .

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