JP2006009387A - Low-noise draining system by pipe having variable cross section - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a low-noise draining system which is implemented by using a pipe having a variable cross section, i.e. a pipe having properties of varying its cross section depending on the flow rate of drainage, and maintains an almost fully flowing state of drainage in the pipe, that can largely fluctuate in flow rate, in every flowing area. <P>SOLUTION: The low-noise draining system is characterized in that the pipe having the variable cross section (a flexible hose made of a synthetic resin or a rubber) flat in normal times but inflatable to form a cylinder body upon application of inner pressure is connected to a conduit of a rainwater drain pipe or an equipment drain pipe. The parts number 1 indicates the flexible hose, the parts number 11 indicates an eaves gutter and the parts number 13 indicates a catch basin. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a low noise drainage system, and more particularly, to a low noise drainage system when rainwater drainage is performed by a rainwater drainage standpipe.

  In general, rainwater drainage for small-scale buildings such as detached houses is constructed by installing a stormwater drainage stand pipe with a relatively large diameter and a rigid section (50-100mm) outdoors and letting it fall naturally to the ground surface. Connect to and drain.

  However, the rainwater drainage of a small-scale building such as a detached house as described above is sometimes used as an indoor concealed piping method for small-diameter drainage pipes for reasons such as external design and site design conditions. However, it is relatively low noise during full drainage with very little rainfall or maximum design rainfall, but generally with a low filling rate flow in the intermediate flow range that is a partial drainage load flow, generally a gas-liquid two-phase annular or multiphase flow Thus, a running sound is generated when the running water hits the pipe wall at a bent portion of the pipe.

  On the other hand, there is an instrument drainage system for sanitary equipment (Patent Document 1) or a siphon-type rainwater drainage system that transports rainwater by siphon force using a small drainage pipe as a small diameter pipe (Patent Document 2). However, even with such a system, although there are significant improvements, there are many restrictions when constructing a practical system, and improvements are required in terms of controlling noise generation. is there.

JP 2000-297447 A

Japanese Patent Application No. 2004-069149

  In Patent Document 1, a siphon type system is mainly used for a horizontal branch pipe of drainage brought from an instrument, and in Patent Document 2, a siphon type system developed for transporting rainwater is concerned. Is. Even in such a siphon system, it is inevitable that a running water sound hits the pipe wall as in the conventional system described above.

  In particular, even in the latter siphon-type rainwater drainage system using small-diameter pipes, there is a demand for indoor wall concealment piping as in the case of conventional rainwater drainage systems. As the pipe material in this case, generally used metal pipes such as copper and stainless steel pipes, hard PVC pipes and other resin pipes have a property of maintaining the pipe cross-sectional shape.

  Therefore, when partial drainage occurs, there is room in the cross section of the pipe with respect to the drainage, so that water flows like a waterfall in an empty pipe, and the sound of running water hitting the pipe wall is perceived as a noise source. Inevitable.

  The present invention has been made in view of the prior art as described above, and provides a system that keeps the sound of running water in a drain pipe at a low noise level and at a low cost.

  The present invention relates to a low-noise drainage system characterized in that a cross-sectional deformation pipe which is flat in a normal state and is opened by internal pressure and becomes a cylindrical body is connected in a path of rainwater or an instrument drain pipe. Provides a system made of synthetic resin or rubber.

  The present invention is a drainage system as described above, which uses a cross-section deformed pipe, that is, a pipe having a property of deforming the cross section according to the water flow rate, and a drainage flow having a wide fluctuation range is close to a full flow in all flow ranges. The low-noise drainage system was completed while maintaining the condition.

  Although the drainage system of the present invention can be applied to rainwater drainage and instrument drainage, it will be further described below mainly with a rainwater drainage system. Now, as a pipe used for a normal rainwater drainage system, a pipe having a property of maintaining a highly rigid cross-sectional shape is widely used. Therefore, air is mixed into the pipe at the time of small flow rate drainage, and the flow of water flowing to hit the pipe wall becomes a low water filling rate flow. Reach. If this noise source is dealt with by improving the sound insulation and sound absorption performance of the piping and the concealment space, a large amount of space, resources and labor are required, resulting in high costs.

  The present invention pays attention to the fluctuation range in which the flow range of rainwater drainage reaches 3 digits, and is replaced with a metal pipe or resin pipe with a large cross-sectional rigidity, and when there is no drainage, the flat section of the pipe is flat. When the drainage flows in, the pipe section is gradually expanded and deformed by the weight and position pressure of the drainage, and the pipe section is automatically adjusted from linear to circular according to the flow rate. The most characteristic feature is the use of a tube with such characteristics. If a pipe having such a property is used as a drainage pipe, for example, the flow in the drainage pipe can be made full flow with respect to a wide range of load fluctuations corresponding to rainfall intensity of 1 to 100 (mm / hour). Drainage did not act like a tap on the pipe wall in combination with air mixing, and the running sound could be drained with almost no sound.

  Even in the sanitary appliance drainage system, the flow rate decreases and the running noise increases at the beginning or near the end of drainage. Although the width of the flow rate fluctuation in the side branch pipe is small, the situation that becomes a noise source is the same.

  Examples of the cross-section deformable tube used in the present invention include a fiber reinforced synthetic resin or rubber tube, and a cross-section deformable tube using a shape memory resin, an elastic metal, a shape memory metal material, or the like. If it is used for drainage systems such as rainwater drainage systems and toilets, the noise problem of drainage pipes can be solved at low cost by the principle of low-flow water sound.

  In addition, when designing such characteristics with the flow sensor and valve control, which are existing automatic control technologies, not only are expensive resources and cost high, but also the risk of failure and increased cost burden are not met. However, it is no exaggeration to say that there is no low-cost, low-noise drainage pipe.

  Hereinafter, the present invention will be described in more detail with reference to the drawings. FIG. 1 shows a cross-section deformed tube 1 used in the drainage system of the present invention. In this example, the base 2 is an elongated rubber cylinder, and the reinforcing fiber layer 3 is integrally formed so as to cover the outer peripheral surface. Such a flexible hose is formed by stacking an unvulcanized rubber cylinder and a reinforcing fiber layer 3 coated with an unvulcanized rubber, and integrally vulcanizing and molding the same as a flexible hose. In this case, it is usually flattened. Of course, the fiber cord may be knitted on the unvulcanized rubber cylinder or wound up in a spiral and vulcanized and molded.

  As an example of this vulcanization molding, a plate that does not adhere to rubber during vulcanization molding is inserted into an unvulcanized rubber cylinder and heated for a certain time while being flatly pressed to perform vulcanization molding. Of course, after that, the plate is pulled out from the cylinder, and is flatly brazed in a normal state, and becomes a cross-section deformed tube that expands when an internal pressure is applied. Needless to say, it can also be obtained by a method of winding it flatly around a pulley or the like and heating it, or winding it flat while applying tension to a circular inner press die and heating it.

  FIG. 2 shows a conceptual diagram when the cross-section deformed pipe (flexible hose) 1 obtained here is applied as a rainwater drain pipe. Reference numeral 11 denotes an eaves, and a connecting member 12 is provided perpendicularly thereto. The flexible hose 1 is coupled to the connecting member 12, and the flexible hose 1 is suspended and coupled to the connecting member 14 of the collective cage 13. In the figure, 15 is a connecting band. In the form of the flexible hose 1, the portion connected to the connection member 12 at the upper end is opened and the cross section is circular, and the portion connected to the connection member 14 at the other end is similarly opened circularly. In the meantime, the flexible hose 1 is normally flat.

  Therefore, when rainwater flows from the eaves 11 into the flexible hose 1 due to rain, the flexible hose 1 gradually opens from above by increasing its weight, and the rainwater is correspondingly increased. Since the open state gradually reaches the connecting member 14 and the entire length of the flexible hose 1 is open and the flexible hose 1 is filled with rainwater, the flow becomes a full flow. At this point, the water can be drained very quickly.

  As described above, the rainwater is filled up in the flexible hose 1 and flows out as it is, and the phenomenon of rainwater hitting the pipe wall as in the prior art can no longer be seen.

  In the above example, the entire rainwater drain pipe is formed with a flexible hose, but it goes without saying that the flexible hose may be applied to a part of the drain hose.

  FIG. 3 shows an example in which the flexible hose 1 is adopted in the lateral branch pipe 20 in Patent Document 1. The flexible hose 1 is connected to the connecting member 22 of the wash basin 21 and the lateral branch pipe 20. And the other end is led to the junction joint 23 provided below the side branch pipe 20. Accordingly, the flexible hose 1 is gradually opened by the drainage from the wash basin 21, and the drainage is filled inside. For this reason, when the drainage is filled over the entire length of the flexible hose 1, it becomes a full flow and merges with the rainwater in the vertical pipe 24. Even in this example, the water is drained all at once with the siphon flow, and this reduces the phenomenon that is not preferable as noise in which rainwater flows as in the conventional case.

  Further, in the prior art, the junction joint 23 to the horizontal branch pipe 20 and the vertical pipe 24 is on the same plane, but the flexible hose 1 is used instead of the horizontal branch pipe 20 in this case. As a result, it is possible to reduce an undesirable phenomenon as noise that rainwater flows.

  It is also possible to apply the flexible hose of the present invention to the standpipe 24 in FIG.

  By adopting the siphon activation device for rainwater drainage pipes of the present invention, rainwater drainage is normally performed by storing rainwater in a container connected to a rainwater drainage eaves or a roof drain even during frequent low rainfall. Converts continuous low flow rate flowing through a vertical pipe into a full intermittent flow equivalent to that at the maximum design drainage capacity to prevent clogging of the vertical pipe, which applies a scavenging force to rainwater, and can also be applied to detached houses. It can also be applied to a roof drain such as an apartment, and its range of use is extremely wide.

FIG. 1 shows a flexible hose used in the drainage system of the present invention. FIG. 2 shows a conceptual diagram when the flexible hose is applied as a rainwater drain pipe. FIG. 3 shows an example in which a flexible hose is employed in the lateral branch pipe in Patent Document 1.

Explanation of symbols

1. Flexible hose
2. Flexible hose substrate,
3. Reinforcing fiber layer,
11 ... eaves,
12. Connection member,
13.
14 Connection member
15. Connection band
20 ... Horizontal branch pipe,
21. Washbasin,
22 Connection member
23. Merge joint,
24. Vertical pipe.

Claims (3)

  A low-noise drainage system characterized by connecting a deformed pipe that is flat in a normal state and opened by internal pressure into a tubular body in the path of rainwater or equipment drainage pipe.   2. The low noise drainage system according to claim 1, wherein the cross-section deformed tube is a flexible hose.   The low noise drainage system according to claim 2, wherein the flexible hose is made of synthetic resin or rubber.

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