JP4907640B2 - Drainage pipe fitting device - Google Patents

Description

The present invention is, detached houses, and about the drainage equipment in buildings such as apartment, especially regarding the coupling device of the drain pipe.

  Conventionally, in a building drainage facility, drainage from a drainage device such as a bathroom or kitchen flows from the drainage port of the drainage device to a drainage standpipe that is erected on the top and bottom of the building through the drainage branch pipe. Negative pressure is generated in the drain pipe. If negative pressure is generated in the drain pipe, the sealing function of the trap seal provided in each drainage device may not function normally. Therefore, in general, use a vent pipe to reduce the negative pressure. I have to.

  The vent valve is used together with the vent pipe, and is designed to reduce the negative pressure in the drain pipe by taking air into the vent pipe when the valve is open. It is necessary to provide 150 mm or more from the overflow edge of the drainage device. The reason for this is to prevent leakage of water from the vent valve in the event that the valve function is disturbed. In this way, a non-return function is provided when installing the vent valve. It is necessary to prevent the backflow of drainage by disposing the vent valve at a position higher than the overflow edge. In general, an extended vent pipe is provided above the drainage standpipe, and a vent valve is attached to the tip of the extended vent pipe to prevent drainage from leaking out. For example, see Patent Document 1).

  This vent valve has been mainly used in apartment houses such as condominiums where it is easy to secure a pipe space consisting of an installation space for an extended vent pipe, but in recent years, it tends to be used in detached houses as well. .

On the other hand, the vent valve type with a check valve mechanism is usually installed in a cabinet that is easy to check due to its reliability, and cannot be installed under the floor or in a wall. In other words, this vent valve is installed directly on the drainage device so that it is located below the overflow edge of each drainage device. In order to prevent this, it is necessary to provide a check valve mechanism.
Japanese Utility Model Publication No. 4-126969

  However, when a vent valve is provided at the tip of the extended vent pipe, a large pipe space is required to provide the extended vent pipe. Particularly, this pipe space is required when installing the vent valve in a detached house. However, in this case, the air permeability will be worsened, although the pipe diameter of the pipe will be reduced or the use of a bent pipe with a complicated shape will be forced. There was a risk of causing airflow problems. In addition, when the pipe space necessary for the installation becomes wider in this way, there is a problem that the living space is limited accordingly.

  On the other hand, in the case of a vent valve type with a check valve mechanism, it is difficult to install it under the floor or in the wall, and it can be individually addressed by installing each drainage device. Insufficient ventilation is not possible.

  In addition, when a vent valve is provided for each drainage device, there is a problem that it is necessary to inspect each vent valve and management is troublesome.

The present invention has been developed as a result of intensive studies in view of the above circumstances, and the object of the present invention is to install the drainage system in a space-saving manner without the need for an extended vent pipe. An object of the present invention is to provide a joint device for a drainage pipe that can ensure air permeability in the pipe.

In order to achieve the above object, the present invention connects a drainage standpipe and a horizontal pipe with a joint body disposed in the vicinity of an intersection position between the upper end position of the drainage standpipe and the horizontal pipe, and the drainage standpipe A drainage facility in a building that connects both pipes at a position in which the axis of the horizontal pipe is eccentric with respect to the axis of the pipe, and has a cylindrical shape attached to the upper opening formed in the outer cylinder part of the joint body The insertion portion is suspended from the inside of the outer cylinder portion, and a cylindrical body provided with a diameter reduced from the lower end of the insertion portion via an arc-shaped portion extends downwardly toward the inside of the outer cylinder portion, and The lower end edge of the cylindrical body is positioned below the lower inner diameter lower edge of the horizontal pipe to form a double pipe structure, the cylindrical body serves as an air passage communicating with the outside air, and the outside of the cylindrical body is an appliance such as a kitchen and drainage that flows from the side pipe connected to the water pipe, the insertion portion is positioned inside of the outer cylindrical portion A coupling device of the drainage pipe that can be connected to the end or the vent valve of the trachea.

According to the present invention, it is possible to install in a space-saving manner by providing a breathability by a joint connecting a drainage standing pipe and a horizontal pipe without providing an elongated top ventilation pipe. The pressure can be adjusted to ensure the air permeability in the pipe, and the drainage backflow prevention effect is exhibited. Also, a smooth swirling flow is formed , an air core is formed , and the flow of drainage is rectified to improve the air permeability in the drainage standing pipe, and dirt adheres to the inner wall of the pipe. Can be prevented.

On the other hand, it is a drainage facility that can increase the air permeability when connecting the drainage standpipe and the horizontal pipe so that the drainage can be smoothly drained. it is possible. Further, either the vent pipe or the vent valve can be commonly connected to the insertion portion built in the joint body, and the vent pipe or the vent valve can be appropriately selected and used in accordance with the actual use form.

One embodiment of a joint device for drainage piping in drainage facilities in a building in the present invention is explained in full detail based on a drawing. In FIG. 3, 1 is a drainage facility provided in a building such as a detached house or an apartment house, 2 is a drainage plumbing constituting the drainage facility 1, and 3 is a horizontal piping. It is a drainage horizontal branch pipe. Reference numeral 4 denotes an appliance drain pipe for letting the waste water flowing from the appliance 5 such as a bathroom, a washbasin, a kitchen sink, a toilet bowl, etc. flow down to the horizontal pipe 3, and a trap 4a is provided in the middle of the flow path.

  6 is a joint main body in the present invention. The joint main body 6 includes the upper end position of the drainage standpipe 2 and the horizontal pipe 3 among the drainage standpipe 2 and the horizontal pipe 3 piped according to the number of floors of the building. A drainage pipe 2 and a horizontal pipe 3 are connected to annular connecting tube portions 8 and 9 provided in the main body so as to be disposed in the vicinity of the intersection of the pipes to form a flow path. As shown in FIG. A ventilation mechanism 30 capable of forming an air layer C for preventing backflow is provided inside the main body 6. In this example, the connection between the joint body 6 and the drainage pipe 2 and the horizontal pipe 3 is made to be fitted to the connecting tube portions 8 and 9, respectively. Any appropriate connection means may be used. In addition, the connection of the drainage standing pipe 2 and the horizontal piping 3 which are located other than an upper end is connected by the normal coupling member 7, and forms the other flow path of the drainage equipment 1. FIG.

  The ventilation mechanism 30 is a ventilation valve provided to reduce the negative pressure generated in the drainage facility 1, and the valve chamber 10 of the ventilation valve 30 is partitioned and formed by the cylindrical portion 11 of the joint body 6. An inner annular valve seat 12 and an outer annular valve seat 13 are formed concentrically with the portion 11. Each of these valve seats forms a complete ring. Further, a disc-shaped cap 14 is fitted into the upper opening 11 a of the cylindrical portion 11, and a guide shaft 15 is suspended from the center of the lower surface of the cap 14, and the guide shaft 15 has a radial direction. A plurality of radiating protrusions 15a are formed. The joint body 6 and the cap 14 and the elevating member 19 described later are made of synthetic resin in this example.

  A valve body 16 is provided in the valve chamber 10 so as to be movable up and down. The valve body 16 is normally seated on the annular valve seats 12 and 13 by its own weight, and when the inside of the pipe becomes negative pressure, a large response is generated. It is provided so as to be lifted and released by atmospheric pressure. The valve body 16 may have any structure as long as it exhibits these functions, but the valve body 16 in this example has a circular guide hole 17 at the center and a plurality of communication holes 18. A mounting groove 19a is formed on the outer peripheral surface of a circular lifting member 19 having a ring shape, and an annular flexible member 20 formed of a material such as rubber is attached to the mounting groove 19a, and the circular guide hole 17 of the lifting member 19 is attached. When the guide shaft 15 is fitted to the valve body 16 and the valve body 16 moves up and down while being guided by the shaft 15 and is seated on the annular valve seats 12 and 13 by its own weight, the flexible member The valve is closed while 20 is pressed against the annular valve seats 12 and 13. Further, as shown in the figure, the guide shaft 15 is suspended to a position below the annular valve seats 12 and 13, and the outer diameter of the flexible member 20 is smaller than the inner diameter of the cylindrical portion 11. The cylindrical portion 11 is provided so as not to contact the cylindrical portion 11.

  An air inlet 21 communicating with the atmosphere is provided between the annular valve seats 12 and 13, and a plurality of holding pieces 22 are provided between the annular valve seats 12 and 13 in the radial direction.

  Further, an annular water collecting groove 24 for collecting condensed water in the valve chamber 10 is formed in the outer peripheral portion which is the outside of the outer annular valve seat 13. In this example, the communication flow path 23 is formed. However, it may be provided horizontally and is optional depending on the implementation. In this water collection structure, the collected condensed water can be drained straight in the direction of the drainage standpipe 2 so that drainage efficiency is good and the use of a heat insulating material for suppressing the occurrence of condensation in the valve chamber can be omitted. Has merit. The vent valve mechanism is an example, and it can be applied to other various vent valves.

  The air layer C formed to prevent backflow in the ventilation mechanism 30 can be formed by providing a cylindrical body 32 having a predetermined length at the inflow position of the ventilation mechanism 30. In this embodiment, the cylindrical body 32 is formed integrally with the ventilation mechanism 30 separately from the cylindrical body 12 a provided with the annular valve seat 12 extending, and an inflow port 32 b is formed on the inflow side of the cylindrical body 32. The inflow port 32 b is provided so as to be positioned below the lower edge of the inner diameter of the horizontal pipe 3, and an air passage 36 capable of communicating from the cylindrical body 32 to the air vent mechanism 30 is provided therein. For example, when the drainage is clogged and the water level is going to rise to the inside of the joint body 6, if the inflow port 32 b is blocked by this drainage, the air layer C in the cylindrical body 32 can be kept sealed.

  32a is a taper part, The outer cylinder part 31 and the cylindrical body 32 are shape | molded integrally through this taper part 32a, The inside of this joint main body 6 is made into a double pipe structure, and it is set as the outer channel of this double pipe. A drainage channel 35 is formed.

  In addition, the drainage facility 1 in this example includes the drainage standpipe 2 and the drainage standpipe 2 at a position where the axis of the horizontal pipe 3 is eccentric with respect to the axis of the drainage standpipe 2, that is, the axis of the cylindrical body 32, as shown in FIG. The horizontal pipe 3 is connected, and in the joint body 6, the connecting tube portion 9, which is a connection portion with the horizontal pipe 3, is formed at a position eccentric from the axis. Accordingly, when drainage flows from the horizontal pipe 3 into the drainage channel 35, the drainage flows along the inner wall of the outer cylinder portion 31, and therefore flows down in the drainage channel 35 as a swirling flow.

  In this way, by allowing the drainage to flow down as a swirling flow, an air core is naturally formed in the vicinity of the shaft center in the joint body 6, so that air supply into the drainage stack 2 is ensured, and the horizontal pipe 3 The drainage of water is performed smoothly. Further, in the present invention, since the inner pipe is ventilated by the cylindrical body 32, an air core can be more forcibly formed in the joint body 6, and smooth drainage can be surely performed.

  Here, FIG. 15 is a schematic cross-sectional view showing a comparative example in the vicinity of a conventional vent pipe, in which drainage flows into the inner cylinder portion 32A, and an air passageway is provided between the outer cylinder portion 31A and the inner cylinder portion 32A. It is provided. In this case, when the drainage flows out from the inner cylinder portion 32A, the passage of air is blocked by the drainage, and the drainage is diffused to be in a gas-liquid mixed state, which may hinder the flow. In the present invention, as shown in FIG. 7, since the drainage flows down to the drainage stack 2 along the inner wall of the outer cylinder part 31, the drainage can be performed smoothly without blocking the passage of air. .

  Next, the operation of the above embodiment will be described. Drainage flowing out from the instrument 5 to the horizontal pipe 3 via the instrument pipe 4 is drained in the joint body 6 disposed at the position near the intersection between the upper end position of the drainage standing pipe 2 and the horizontal pipe 3 in the building. It flows down to the road 35. The drainage becomes a swirling flow as described above, and flows down along the inner wall of the outer cylinder portion 31 in the drainage channel 35.

  At this time, since the inflow port 32b of the cylindrical body 32 is provided at least at a position on the inner diameter of the horizontal pipe 3, more preferably at a position lower than the lower end of the inner diameter of the horizontal pipe 3, the drainage is provided in the cylindrical body 32. Never flow backwards. Accordingly, there is no influence on the operation of the ventilation mechanism 30, that is, the ventilation valve, and it is possible to prevent drainage from flowing out to the outside through the ventilation mechanism 30.

  When a negative pressure is generated in the drainage facility 1 at the time of drainage, the vent valve 30 is actuated according to the pressure difference between the negative pressure and the atmospheric pressure to open the valve, and the air is taken into the drainage facility 1. This reduces the negative pressure. When the pressure difference is reduced, the vent valve 30 is closed, and the odor in the drainage facility 1 is not released to the atmosphere.

  When drainage flows backward in the drainage facility 1 and drainage rises from the drainage standpipe 2 side into the joint body 6, when the inflow port 32 b is blocked by this drainage, the cylindrical portion 32 is formed. The air layer C is in a sealed state, and the drainage does not flow back into the cylindrical body 32, and the drainage can be prevented from flowing out through the ventilation mechanism 30. In this case, a positive pressure is applied to the vent valve 30, and the valve closed state is maintained.

  Here, a calculation example of the compressibility of the air layer C when drainage has risen from the drainage standpipe 2 side into the joint body 6 will be shown. In FIG. 4, the internal volume of the main body 6 from the inlet 32b of the cylinder 32 to the ventilation mechanism 30 is a ventilation valve internal volume D, the internal volume D of the ventilation valve is about 1000 cc, 1 atm, It is assumed that the distance from the installation position to the floor is 30 cm, the distance from the floor to the overflow edge is 90 cm, and the distance from the inlet 32b to the overflow edge of the instrument 5 is 120 cm. At this time, since a pressure of 120 cmAq = 1.12 atm is applied to the inflow port 32b, the air layer C becomes 1000 ÷ 1.12≈892 (cc). That is, even when the inflow port 32b is blocked by drainage and the air layer C in the ventilation valve portion is sealed, the air layer C is only compressed by about 12%. Even when drainage flows into the vent, the intrusion of drainage into the ventilation mechanism 30 does not occur.

  As described above, the drainage pipe joint device of the present invention prevents the drainage of the drainage from the horizontal pipe 3 and the drainage of the drainage from the drainage standpipe 2 to prevent the drainage of the drainage to the ventilation mechanism 30. Since the drainage does not flow out from the joint device to the outside, the negative pressure of the drainage facility 1 as a whole can be reduced while preventing the backflow of the drainage by installing only the joint body 6.

  Thus, by providing the main body 6 in the vicinity of the crossing position between the drainage standing pipe 2 and the horizontal pipe 3, it is possible to mount without providing the extended vent pipe, and the installation location can be reduced without requiring a large pipe space. Since it can be made small, it can be stored in a narrow pipe space. In addition, the main body 6 can be installed at a position below the indoor overflow edge, and the ventilation mechanism 30 is integrated, so that this small joint main body particularly in a detached house or an apartment house. By providing the drainage facility 1 using 6, it is possible to provide a wide living space.

  Further, while the joint body 6 is provided indoors in the building, ventilation of the entire drainage facility 1 can be performed intensively, and there is no need to provide a separate check valve, and ventilation by the valve function of the check valve. Since there is no need to consider obstacles, it is not necessary to perform frequent inspections, and management is easy. It is also highly reliable. During inspection, the releasable opening 1a provided above the main body 6 can be opened for easy inspection from the inspection port, and further, the ventilation mechanism 30 with the opening 1a opened. If the cap 14 is removed together with the valve body 16, the drainage standpipe 2 and the horizontal pipe 3 can be opened, and this opening part can be used as a cleaning port.

  FIG. 8 is a cross-sectional view showing a second embodiment of the joint device for drainage pipes according to the present invention, and the annular valve seat 12 is suspended and extended without providing the cylindrical body 32 and the tapered portion 32a in the first embodiment. The inside of the joint body 26 has a double pipe structure by the cylindrical body 12a. In the second embodiment, parts having the same functions as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  In the drawing, the inlet 12b of the cylindrical body 12a is provided so as to be positioned lower than the lower edge of the inner diameter of the horizontal pipe 3 as in the case of the first embodiment. An annular water collecting groove 24 and a communication channel 23 for collecting the condensed water in the valve chamber 10 are formed in the outer peripheral portion, which is directly connected to the outer periphery of the double pipe. It communicates with the drainage channel 35. FIG. 9 is a cross-sectional view taken along the line E-E of the cylindrical portion 11 in FIG. 8 and shows this water collection structure.

  As in the first embodiment, the drainage flowing down from the horizontal pipe 3 becomes a swirling flow and flows down in the drainage channel 35 along the inner wall of the outer cylindrical portion 31, and at this time, it does not flow back into the cylindrical body 12a. In addition, the drainage does not flow outside through the ventilation mechanism 30.

  Moreover, even if the wastewater flows back into the drainage facility 1 and the wastewater rises from the side of the drainage stack 2 to the inside of the joint body 26, the wastewater rises to the communication channel 23 as shown by the hatched portion in FIG. At this time, the formation of the sealed air layer F can prevent the backflow of drainage to the ventilation mechanism 30. However, the capacity of the air layer F is smaller than that in the case where the cylindrical body 32 is separately provided as in the first embodiment.

  FIG. 11 is a cross-sectional view showing a third embodiment of the drainage pipe joint device of the present invention, in which 37 is a joint body in the present embodiment. In the figure, the drainage standpipe 2 and the horizontal pipe 3 are connected by a joint body 37 disposed in the vicinity of the intersection between the upper end position of the drainage standpipe 2 and the horizontal pipe 3, and a cylindrical tube is formed inside the joint body 37. A double pipe structure having a body 42 is provided, and the outer flow path of the double pipe is a drainage path 45 and the inner flow path is a ventilation path 46 communicating with the atmosphere. In addition, 43 is a cylindrical connection part provided in the upper part of the cylindrical outer cylinder part 41 which comprises a main body, and the cylinder 42 is integrated so that it may hang down from this connection part 43 in a present Example. It is molded into.

  Reference numerals 48 and 49 denote connection cylinder parts formed integrally with the main body 6, and the connection cylinder part 48 and the drainage standing pipe 2 or the connection cylinder part 49 and the horizontal pipe 3 are connected to form a flow path. . At this time, the drainage standpipe 2 and the horizontal pipe 3 are connected at a position where the axis of the horizontal pipe 3 is eccentric with respect to the axis of the drainage standpipe 2.

  Reference numeral 38 denotes a connecting member such as an elbow. One end of the connecting member 38 is fitted and connected to the connecting portion 43, and the other end is connected to the tubular connecting vent tube 39. Further, the other end of the connection vent pipe 39 is communicated with the outside air of the building via the wall surface W or the like to form a vent channel from the main body 37. In addition, 40 is a louver provided in an air release site.

  Since the joint main body 37 has a double pipe structure in which the outer flow path is the drainage channel 45 and the inner flow path is the air passage 46 communicating with the atmosphere, as in the embodiment described above, the drainage channel 45 is connected to the horizontal pipe 3. When drainage flows into the drainage passage, the drainage path 46 is not blocked by the drainage, and the drainage path 45 can be allowed to flow without hindering ventilation from the ventilation path 46. Moreover, the drainage can be swirled by the surface tension along the inner wall of the outer tube portion 41, which is the outer tube, and the inner air vent positively forms an air core at the drainage center in the drainage stack 2 Since it is performed automatically, a smoother flow can be created.

  Further, the connecting portion 43 of the joint body 37 can be provided with a vent valve at the tip thereof by connecting, for example, an extended vent pipe in addition to performing ventilation from the wall surface W. It can be applied everywhere to make the piping breathable.

FIG. 12 is a sectional view showing a fourth embodiment of the drain pipe joint device of the present invention. Reference numeral 47 denotes a joint body. In the present embodiment, a tubular body 49 is inserted into the upper portion of the outer tubular portion 48 of the joint body 47 via a seal member 50. 51 Ru insertion portion der provided inside of the outer tube portion 48. As shown in FIGS. 12 to 14, the cylindrical body 49 is attached to the upper opening of the outer cylindrical portion 48 so that the insertion portion 51 is suspended inside the outer cylindrical portion 48, and an arc-shaped portion is formed from the lower end of the insertion portion 51. It has a cylindrical shape reduced in diameter via 51a. As shown in FIGS. 13 and 14, either the ventilation pipe 55 or the ventilation valve 56 can be commonly connected to the insertion portion 51. In addition, a conventional vent valve for an elongated vent pipe can be used. In addition, 52 is an O-ring for sealing between the insertion part 51 when the ventilation pipe 55 or the ventilation valve 56 is inserted.

It is the longitudinal cross-sectional view which showed an example of the coupling apparatus of the drain piping in this invention. It is an external view of the joint apparatus of the drain piping of this invention seen from the arrow direction of FIG. It is the schematic explanatory drawing which showed the whole drain pipe. It is a longitudinal cross-sectional view which shows the state which the waste_water | drain flowed back from the drain stand piping side to the coupling apparatus of the drain piping of this invention. It is the sectional view on the AA line of FIG. FIG. 3 is a sectional view taken along line B-B in FIG. 2. It is a schematic sectional drawing which shows the ventilation path vicinity of this invention. It is the longitudinal cross-sectional view which showed 2nd Example of the coupling apparatus of the drain piping of this invention. It is the EE sectional view taken on the line of the cylindrical part of FIG. It is a schematic longitudinal cross-sectional view which shows the state which the waste_water | drain flowed back from the drain stand pipe side to the coupling apparatus of the drain piping of FIG. It is the longitudinal cross-sectional view which showed the Example of the drainage facility in the building of this invention. It is the longitudinal cross-sectional view which showed 4th Example of the coupling apparatus of the drain piping of this invention. It is a longitudinal cross-sectional view which shows the state which connected the vent pipe to the coupling apparatus of the drain piping of FIG. It is a longitudinal cross-sectional view which shows the state which connected the vent valve to the coupling apparatus of the drain piping of FIG. It is a schematic sectional drawing which shows the conventional ventilation pipe vicinity.

Explanation of symbols

2 Drainage pipe 3 Horizontal pipe 45 Drainage channel (outer channel)
46 Ventilation path (inner flow path)
47 joint body
49 cylinders
50 Seal member
51 Insertion part
52 O-ring
55 Ventilation pipe
56 Ventilation valve

Claims (1)

The drainage vertical pipe and the horizontal pipe are connected by a joint body disposed near the intersection between the upper end position of the drainage vertical pipe and the horizontal pipe, and the axis of the horizontal pipe is connected to the axis of the drainage vertical pipe. A drainage facility in a building that connects both pipes at an eccentric position, and a cylindrical insertion portion attached to an upper opening formed in the outer cylinder portion of the joint body is suspended inside the outer cylinder portion. The cylindrical body provided with a diameter reduced from the lower end of the insertion portion via the arc-shaped portion extends downwardly toward the inner side of the outer cylindrical portion, and the lower end edge of the cylindrical body is connected to the lateral pipe. A double-pipe structure that is positioned below the lower edge of the inner diameter, has a ventilation path that communicates with the outside air inside the cylinder, and a drainage path that flows in from a horizontal pipe that connects the outside of the cylinder to an appliance distribution pipe such as a kitchen and then, the end or the vent valve of the vent pipe is connectable to the insertion portion is positioned inside of the outer cylindrical portion Coupling device of the drainage pipes, characterized in that.

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