JP2008127837A - Siphon drainage system and structure of vent pipe for use in it - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To take new measures to prevent the intrusion of water into a vent pipe provided in a storage tank, because the allowable range of the height of the storage tank for use is not so wide, on ground that a location for installing a siphon drainage system often has a narrow space. <P>SOLUTION: In this siphon drainage system, the storage tank 5, which is provided between a water-section appliance 2 and a siphon drain pipe 3, is equipped with the vent pipe 7. A leading end 7a of the vent pipe 7, which is connected into the storage tank 5, is provided with a mechanism 10 for automatically controlling the intrusion of the water, such as a floating ball valve system 11. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a siphon drainage system including a storage tank and a structure of a vent pipe used for the siphon drainage system. More specifically, the present invention relates to a structure for controlling flowing water into the vent pipe.

  In recent years, a siphon drainage system has been proposed in place of the gradient drainage system conventionally used as a drainage system (Patent Document 1). Furthermore, a siphon drainage system in which a storage tank is disposed in the drainage system has been proposed in order to cope mainly with a large amount of drainage such as a sink (Patent Document 2).

JP 2000-297447 A

JP 2003-201727 A

  An outline of a siphon drainage system equipped with a storage tank is shown in FIG. 1 taking an apartment house as an example, and is composed of a drainage stand 1, a watering device 2, and a siphon drainage pipe 3 connecting the two. The pipe 3 is connected to the junction 4 with a certain drop Hs with respect to the drainage stack 1. In addition, a storage tank 5 is provided between the watering device 2 and the siphon drain pipe 3 as a countermeasure against the sinking. The connecting pipe 6 between the watering device 2 and the storage tank 5 is usually arranged with a gradient, and generally has a structure that flows into the upper part of the storage tank 5, while the siphon drain pipe 3 is a storage tank. 5 is connected to the bottom portion of the slab 5 or the vicinity thereof, and is normally disposed without a gradient along the upper surface or the lower surface of the slab S.

  In the storage tank 5, when the drainage flows, the air in the storage tank 5 is pushed out. Conversely, after the siphon is activated, the air flows into the storage tank 5. For this reason, in the storage tank 5 in which no measures are taken, sealing water is cut off due to excessive pressure in the storage tank 5 and water is ejected from the trap. For this reason, a vent pipe 7 is disposed in the vicinity of the top of the storage tank 5, and this vent pipe 7 is usually guided together with the siphon drain pipe 3 and connected to the junction 4.

  That is, outside air enters and exits the storage tank 5 through the vent pipe 7, so that problems caused by the entry and exit of air during drainage are extremely reduced. Therefore, it is not preferable that water enters the ventilation pipe 7. If water enters the ventilation pipe 7, not only the noise is generated during drainage but also the trap of the trap of the watering device 2 is not sealed. Eruption from water-related equipment may occur. As a countermeasure, a proposal has already been made to bring the vent pipe 7 to a position higher than the storage tank 5.

  However, the place where the drainage equipment is usually installed is a narrow space, and the height is not so much acceptable. Therefore, the present invention proposes a new measure for preventing water from entering the ventilation pipe.

  The gist of the first invention is a siphon drainage system comprising a storage tank between a watering device and a siphon drain pipe, and a vent pipe in the storage tank. The present invention relates to a siphon drainage system including a mechanism for automatically controlling intrusion.

  And the 1st of 2nd invention is related with the structure of the ventilation pipe applied to the above-mentioned 1st invention, and the mechanism which controls water invasion raises the position with the rise or fall of the water level. The structure of a vent pipe that is a float valve system that is lowered and closes, for example, the tip of the vent pipe when the water level exceeds a certain level and opens the closed portion of the vent pipe when the water level falls below a certain level It is.

  In the second aspect of the second invention, the mechanism for automatically controlling the intrusion of water raises or lowers the position as the water level rises or falls, and when the water level reaches a certain level or more, for example, It is a structure of a vent pipe that is a flap valve system that closes the tip and opens the closed portion of the vent pipe when the water level becomes below a certain level.

  Further, according to a third aspect of the second invention, when the mechanism for automatically controlling the entry of water closes the vent pipe when the water level exceeds a certain level, and closes the vent pipe when the water level falls below a certain level. It is a structure of a vent pipe that is a contraction valve system that opens a part.

  Furthermore, a fourth aspect of the second invention is a mechanism for automatically controlling the intrusion of water, comprising a water level detection means and a vent pipe opening / closing means, and the water level detection means has a predetermined level or more in the storage tank. An electronic control system that sends a signal to the opening and closing means of the vent pipe to close the vent pipe when a rise in the water level is detected, while sending a signal to open the vent pipe when the water level falls below a certain level. It is a structure of a certain vent pipe.

  The present invention is provided with a mechanism for automatically opening and closing a vent pipe as the water level rises, and automatically opens and closes when the water level in the storage tank rises or falls, thereby allowing water in the storage tank to enter the vent pipe. This eliminates problems such as noise during drainage and delay in siphon activation.

  In the past, the storage tank was designed to have excessive specifications, such as making it larger than necessary, so that water could not enter the vent pipe. This problem has also been improved, and the size of the storage tank and siphon drainage have been improved. The pipe throughput was set to an appropriate specification, and a relatively inexpensive drainage system could be provided.

  In the design of the conventional storage tank, 1) The capacity of the storage tank should be large enough to store the amount of drainage for the time until the siphon start, and 2) The treatable flow rate can be simultaneously measured from a plurality of connected watering devices. It was designed based on the fact that it has a capacity that exceeds the amount of drainage when drained. This is because if 1) and 2) are not satisfied, water will overflow to the side of the instrument before siphoning, or drainage will flow into the vent pipe. Then, when water flows into the vent pipe, there arises a problem that sealing water is cut off or water is ejected from a trap in another water-circulating device.

  For this reason, the storage tank has a size and a processing capacity that do not occur if it is a normal use method. From this point, the workable area is limited.

  However, in practice, from the viewpoint of simultaneous use of watering devices, there is almost no simultaneous drainage of a plurality of watering devices, and in a kitchen, there is almost no drainage. In order to cope with almost none of these conditions, it is over-specification, and in the case of normal usage, that is, a small amount of continuous drainage, siphon becomes effective in reverse. Etc. were also pointed out.

  As a result of intensive studies to cope with such a request, the first invention has been completed, and in the unlikely event, a storage tank, a processing amount, and a pipe that can be sufficiently treated in the case of drainage in a normal usage manner. At the same time, the mechanism is provided with a mechanism that automatically closes the vent pipe in response to the rise in the water level in the storage tank, so that water never enters the vent pipe.

  In the second invention, a specific example of the mechanism that automatically opens and closes based on the rise of the water level in the first invention is provided, and by providing the mechanism for the vent pipe, the size of the storage tank is extremely small. However, it was decided to some extent by the size of the storage under the floor and the size of the inspection port. Therefore, the characteristics of the siphon drainage system, which has a higher degree of design freedom than the conventional drainage system, are further expanded.

  As a specific example of the automatic control mechanism for intrusion of water provided at, for example, the tip of the vent pipe of the second invention, the position is raised or lowered as the water level rises or falls, and when the water level reaches a certain level or higher. Is a mechanism that closes the vent pipe and opens the closed portion of the vent pipe when the water level is below a certain level. 1) Float valve system, 2) Flap valve system, 3) Shrink valve system, etc. It is done.

  As a float valve, a float ball valve is most suitable, and usually floats on the surface of the water, and the vent pipe is closed when the water level rises.

  As the flap valve, a rubber or resin plate is used, which is pressed against the tip of the vent pipe due to the rise in water level and closes the vent pipe.

  The contraction valve is formed of pipe-like rubber or a flexible resin material, and this part is crushed by water pressure to cut off the flow of water.

  As the electronic control method, the water level detecting means and the opening / closing means of the vent pipe are not particularly limited. However, as the water level detecting means, an electrode reaching a predetermined depth is inserted, and the water level is detected by a change in electrical conductivity. A system is conceivable in which a signal is sent to the opening / closing means of the vent pipe.

  Hereinafter, the present invention will be described in more detail with reference to the drawings. FIG. 2 is a view showing the first of the first invention and the second invention. The whole drainage system and reference numerals 1 to 7 are the same as described in FIG. 1, and although omitted here, reference numeral 10 in the figure indicates water intrusion into the tip 7 a of the vent pipe 7 connected to the storage tank 5. This is an automatic control mechanism.

  Now, the mechanism 10 for automatically controlling the intrusion of water is such that the tip 7a of the vent pipe 7 spreads out in a trumpet shape, and a floating valve (ball) 11 is arranged immediately below. Accordingly, the water from the watering device 2 flows into the storage tank 5 through the connecting pipe 6. In the normal drainage state, the water level in the storage tank 5 is drained by siphon activation without rising so much.

  Furthermore, during normal drainage, immediately after drainage from the water circulation device 2, the inside of the storage tank 5 becomes positive pressure, and the internal air escapes from the vent pipe 7 to the outside. On the other hand, when the siphon is activated, the inside becomes negative pressure, but outside air is taken in from the vent pipe 7. Thus, no problem occurs at the time of normal drainage, but the water level in the storage tank 5 becomes high when there is a large amount of drainage at a time. At this time, there is a possibility that water may enter into the vent pipe 7, but the floating ball valve 11 rises with the water level, fits into the trumpet-shaped tip 7 a of the vent pipe 7, and enters water into the vent pipe 7. It prevents intrusion. Of course, when the water level falls, the floating ball valve 11 also descends together with the water level and leaves the tip 7a of the vent pipe 7.

  FIG. 3 shows the second aspect of the second invention. In this example, the tip 7a of the vent pipe 7 is connected to the side surface of the storage tank 5, and is suitable, for example, when the structure of FIG. Now, the mechanism 10 for automatically controlling the intrusion of water is an example in which a flap valve 12 is provided. Therefore, when the water level in the storage tank 5 rises, the water level rises around the hinge 12a and rotates upward to block the tip 7a of the vent pipe 7.

  FIG. 4 is a diagram showing a third aspect of the second invention. In this example, the vent pipe 7 is connected through a considerably low portion of the side surface of the storage tank 5, and the tip 7a has a structure extending upward. This case is also suitable when the structure of FIG. 2 or FIG. 3 cannot be taken due to the space. Now, the mechanism 10 for automatically controlling the intrusion of water is an example in which a flexible rubber pipe (contraction valve crushed by water pressure) 13 is connected immediately below the tip 7a of the vent pipe 7. When the water level in the storage tank 5 rises, the rubber pipe 13 is crushed by water pressure, and water is prevented from entering the vent pipe 7. Of course, when the water level drops and the water pressure is no longer applied, the rubber pipe 13 returns to its original shape.

  The present invention has the configuration as described above, and can be applied to all siphon drainage systems including a storage tank, and its application is extremely wide.

FIG. 1 is an overall view of a siphon drainage system. FIG. 2 is an overall view of the siphon drainage system of the first invention, and is a diagram in which the first example of the second invention is adopted as a mechanism for automatically controlling the intrusion of water. FIG. 3 is a diagram showing a second example of the second invention. FIG. 4 is a diagram showing a third example of the second invention.

Explanation of symbols

1. Drainage stack,
2. Watering equipment,
3. Siphon drain pipe,
4 ... Junction,
5. Storage tank
6. Connection pipe,
7 Ventilation pipe
10. Mechanism to automatically control water intrusion,
11. Floating ball valve,
12. Flap valve,
13: Shrink valve.

Claims (5)

  In a siphon drainage system comprising a storage tank between a watering device and a siphon drain pipe, and a vent pipe in the storage tank, a mechanism for automatically controlling the entry of water into the vent pipe connected to the storage tank. Siphon drainage system characterized by comprising.   The mechanism that automatically controls the intrusion of water raises or lowers the position as the water level rises or falls, closes the vent pipe when the water level exceeds a certain level, and when the water level falls below a certain level 2. The structure of a vent pipe in a siphon drainage system according to claim 1, which is a float valve type that opens the closed portion of the vent pipe.   The mechanism that automatically controls the intrusion of water raises or lowers the position as the water level rises or falls, closes the vent pipe when the water level exceeds a certain level, and when the water level falls below a certain level 2. The structure of a vent pipe in a siphon drainage system according to claim 1, which is a flap valve type that opens the closed portion of the vent pipe.   The mechanism that automatically controls the entry of water is a contraction valve system that closes the vent pipe when the water level exceeds a certain level and opens the closed portion of the vent pipe when the water level falls below a certain level. Item 2. A structure of a vent pipe in the siphon drainage system according to item 1.   The mechanism that automatically controls the intrusion of water is provided with a water level detection means and a vent pipe opening / closing means, and when the water level detection means detects a rise in water level above a certain level in the storage tank, the vent pipe The siphon drainage system according to claim 1, wherein a signal is sent to the opening and closing means to close the vent pipe, and when the water level is below a certain level, a signal is sent to open the vent pipe. The structure of the trachea.

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