JP2008163634A - Air escape device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air escape device capable of buffering the positive pressure/negative pressure of a blocked area by bringing about the efficient flow of air in the blocked area of a drain pipe. <P>SOLUTION: An air escape body 20 can be deformed in such a shape as to be put into an expanded state in which an internal space is expanded by the positive pressure so as to bring about the escape of the air in the blocked area C, when the positive pressure is generated in the blocked area C formed in the drain pipe between first and second seal-water portions, or a contracted state in which the internal space is contracted by the negative pressure so that the air taking shelter in the internal space can be discharged into the blocked area C, when the negative pressure is generated in the blocked area C. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention is provided in a drain pipe between a first sealing portion formed on the downstream side of the drain port and a second sealing portion formed further on the downstream side of the first sealing portion. It is related with the air-evacuation device.

  For example, in a drain pipe facility connected to the downstream side of a drain outlet disposed in a kitchen sink or the like, conventionally, a drain trap is provided in the pipe line, and by holding the drainage in this drain trap, the downstream side It has the effect of preventing odors, insects, etc. from entering the drain outlet side.

  However, unexpectedly, there are multiple drain traps in the pipeline, or there is only one drain trap, but there are multiple drain traps due to reverse gradient caused by poor construction of drain pipes upstream or downstream of this drain trap. In a drainage pipe facility that has a sealed water portion, a closed portion that blocks air flow is formed on the downstream side of the drain trap, and positive or negative pressure is generated in this closed portion. In the case of water, air and air on the drain outlet side caused a strange odor and noise due to backflow. In addition, there is a problem that the positive pressure becomes resistance of drainage, and it is difficult for water to flow down from a drain outlet such as a sink.

  In the conventional drainage pipe equipment, there is a case where air having a compressibility stays on the downstream side of the deodorant drain trap, and the buffered empty pipe for temporarily evacuating the retained compressed air is a drainage pipe. (See, for example, Patent Document 1).

JP 2000-17704 A (2nd page, FIG. 4)

  However, in Patent Document 1, the above-described buffer empty pipe in the drainage facility has a constant internal volume and is branched to communicate with the drain pipe. The inside of the buffer empty pipe is always air. Since it is filled and always has the same air pressure as the closed portion of the drain pipe, there is a problem that the air cannot efficiently flow between the drain pipe and the buffer empty pipe and the pressure cannot be buffered.

  The present invention has been made paying attention to such a problem, and provides an air withdrawal device capable of efficiently flowing air in a closed region in a drain pipe and buffering positive pressure and negative pressure in the closed region. With the goal.

In order to solve the above-described problem, an air withdrawal apparatus according to claim 1 of the present invention is provided.
Air evacuation provided in the drain pipe between the first sealed water portion formed downstream of the drain port and the second sealed water portion formed further downstream of the first sealed water portion. A device,
An air evacuation body that communicates with a drain pipe between the first sealed water portion and the second sealed water portion and that can form a sealed internal space;
The air shelter is
When a positive pressure is generated in a closed region formed in the drain pipe between the first sealed water portion and the second sealed water portion, the internal space is expanded by the positive pressure, and the closed region An inflated state that evacuates the air inside,
When a negative pressure is generated in the closed area, the internal space is contracted by the negative pressure, and a contracted state in which the air retracted in the internal space is discharged to the closed area;
It is characterized by being deformable.
According to this feature, when a positive pressure is generated in the closed region formed in the drainage pipe between the first sealed water portion and the second sealed water portion due to the flow of drainage in the drainage pipe, the air is saved. By expanding the internal space of the body and evacuating the air in the closed area, it is possible to prevent backflow of air and drainage to the drainage port side, and to prevent unpleasant odors and flow noise due to this backflow. Furthermore, the water at the drainage port can flow smoothly without resistance. In addition, when negative pressure is generated in the closed area, the internal space of the air retractor is contracted, and air is discharged to the closed area retracted in the internal space, so that the drainage is sealed without flowing under negative pressure. Since the water portion can be retained in a predetermined manner, the odor in the drain pipe can be blocked in a predetermined manner. Thus, by expanding and contracting the internal space of the air-retracting body and appropriately changing the volume, the air in the closed region can be efficiently flowed and the positive pressure and the negative pressure can be buffered. Further, since the air in the closed area is evacuated in the sealed internal space of the air evacuation body, the odor of the evacuated air is not leaked to the outside.

The air withdrawal apparatus according to claim 2 of the present invention is the air withdrawal apparatus according to claim 1,
A cover having a larger internal volume than the inflated air evacuation body is provided so as to cover the outside of the air evacuation body.
According to this feature, since the air evacuation body is provided inside the cover having an inner volume larger than that of the expanded air evacuation body, the drain pipe is blocked without being affected by the outside of the cover. It can be freely deformed only by positive pressure or negative pressure in the region.

The air withdrawal apparatus according to claim 3 of the present invention is the air withdrawal apparatus according to claim 2,
The cover is formed with an air hole that communicates the outside and the inside of the cover.
According to this feature, even if the volume of the gap between the cover and the air evacuation body changes depending on the expansion state or the contraction state of the air evacuation body, the air is caused to flow into the gap through the air holes, and the air pressure in the gap is reduced. Since it can be kept constant, the air shelter can be deformed only by the positive or negative pressure in the closed region of the drain pipe without being affected by the air pressure in the gap.

The air withdrawal apparatus according to claim 4 of the present invention is the air withdrawal apparatus according to any one of claims 1 to 3,
The air evacuation body is characterized by being formed into a bag-like body having a mouth portion directed downward.
According to this feature, since the drainage flowing in the drainage pipe does not easily flow into the bag-like body having the mouth portion directed downward, the deformable volume of the bag-like body formed in the bag-shape that is easily deformed is maintained. I can do it.

The air withdrawal apparatus according to claim 5 of the present invention is the air withdrawal apparatus according to claim 4,
The mouth of the bag-like body is provided with a eye plate for preventing foreign matter from entering the bag-like body.
According to this feature, it is possible to prevent foreign matter flowing in the drain pipe from entering the bag-like body by the eye plate, so that the bag-like body is not damaged by the foreign matter, and air can be withdrawn or discharged over a long period of time. It becomes.

An air withdrawal apparatus according to claim 6 of the present invention is the air withdrawal apparatus according to claim 4 or 5,
A water storage part capable of storing drainage is formed below the mouth part of the bag-like body, and the mouth part is larger in diameter than the mouth part and the mouth part is increased by raising the water level of the water storage part. It is characterized by containing a closable float.
According to this feature, in the event of an emergency when a relatively large amount of wastewater flows into the bag-like body, the wastewater is stored in a water storage section formed below the bag-like body, and floated into a bag-like shape by raising the water level of the water storage section. Since the opening of the body can be closed, it is possible to prevent the drainage from flowing into the bag-like body even in an emergency.

An air withdrawal apparatus according to claim 7 of the present invention is the air withdrawal apparatus according to any one of claims 1 to 6,
An inflow prevention piece for preventing the inflow of drainage into the air shelter body is projected from a communication opening through which the air shelter body communicates from a drain pipe.
According to this feature, the inflow prevention piece prevents the inflow of drainage to the air shelter body, so that only the air in the drain pipe flows to the air shelter body, and the volume of air that can be withdrawn or discharged can be secured.

  Examples of the present invention will be described below.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. First, FIG. 1 is a cross-sectional view showing an overall image of a drain pipe facility in an embodiment of the present invention. FIG. 2 is a cross-sectional view showing an initial mounting state of the air withdrawal device. Fig.3 (a) is sectional drawing which shows the expansion | swelling state of a bag-like body, (b) is sectional drawing which shows the contraction state of a bag-like body. FIG. 4 is a cross-sectional view showing an emergency air evacuation device in which a large amount of drainage flows.

  The code | symbol 1 of FIG. 1 is the kitchen stand arrange | positioned in a kitchen. The kitchen table 1 is provided with a sink 2. A drainage port 3 is formed on the bottom surface of the sink 2, and a drainage pipe 4 communicating with the drainage port 3 is connected thereto.

  A storage space 5 is formed below the sink 2 in the kitchen table 1, and a door 6 that can open the storage space 5 is attached to the front side of the sink 2. The drain pipe 4 constituting the first drain trap 7 and the like is bent from the first drain trap 7 to the back side and then extended downward. Therefore, the storage space 5 below the sink 2 can be widely used without being obstructed by the drain pipe 4.

  The drain pipe 4 includes the first drain trap 7 described above, a vertical pipe 8 provided in the vertical direction on the downstream side of the first drain trap 7, and a horizontal pipe 10 continuously connected to the downstream side. The second drain trap 9 interposed in the pipe of the horizontal pipe 10, that is, provided further downstream of the first drain trap 7, is connected to a sewage pipe (not shown). .

  The first drain trap 7 includes a first vertical pipe that is an introduction part continuously to the drain port 3, a lower curved part that is curved 180 degrees to the right side of the vertical pipe from the vertical pipe, and faces upward. As a whole, a second vertical pipe that is raised upward and is arranged close to and parallel to the first vertical pipe, and an upper curved portion that curves 180 degrees to the right of the second vertical pipe and faces downward are shown as a whole. The first sealing portion H is formed in a substantially S shape, and a predetermined amount of drainage stays in the first vertical pipe, the lower curved portion, and the second vertical pipe.

  Similarly, the second drain trap 9 includes a first vertical pipe that is an introduction part continuously to the horizontal pipe 10, and a lower curved part that curves 180 degrees to the left of the first vertical pipe and faces upward. The first vertical pipe and the lower curve are formed as a whole by a second vertical pipe that is raised upward from the lower curved portion and is disposed in parallel with the first vertical pipe. A second sealed portion J in which drainage stays in a predetermined amount is formed inside the portion and the second vertical pipe.

  The first sealing portion H formed in the first drain trap 7 and the second sealing portion J formed in the second drain trap 9 constitute a so-called double trap.

  Next, on the upper part of the vertical pipe 8 provided between the first drain trap 7 and the second drain trap 9, a block formed between the drain traps 7 and 9 in the drain pipe 4 as described later. An air withdrawal device 11 having a bag-like body 20 communicating with the region C is connected.

  As shown in FIG. 2, the air evacuation device 11 will be described. The air evacuation device 11 includes a T-shaped pipe joint 12 whose inside communicates with a T-shape, a main body 13 whose interior communicates with a T-shape, and a cover. 14 and the cap 15 form an outer shape. The cover 14 accommodates a bag-like body 20 as an air evacuation body that can be deformed into an expanded state or a contracted state, which will be described later, and accommodates a float 15 in the main body 13. Has been.

  More specifically, the upper part of the vertical part 12a of the T-shaped pipe joint 12 is watertightly connected by screwing the cap nut 30 via the first drain trap 7 and the V packing 31, and similarly, the vertical part 12a. Are connected in a watertight manner by screwing the cap nut 32 via the vertical pipe 8 and the V packing 33, and the vertical portion 12a continues to the horizontal portion 12b via the communication opening K formed in the horizontal direction. ing. The communication opening K is formed by drilling the inner wall of the vertical portion 12a on the horizontal portion 12b side, and the inner wall upper portion 12c of the vertical portion 12a extends inward as compared with the inner wall lower portion 12d, which will be described later. It protrudes as an inflow prevention piece for preventing the inflow of drainage into the bag-like body 20 side.

  Next, the horizontal portion 13a of the main body 13 is watertightly connected by screwing the horizontal portion 12b of the T-shaped pipe joint 12 and the cap nut 34 via the V packing 35, and the upper portion of the vertical portion 13b of the main body 13 is The cover 14 is fitted, and the lower portion of the vertical portion 13b is detachably screwed with the cap 15 via a flat packing 37.

  The cover 14 has an internal volume larger than the volume of the inflated state of the bag-like body 20 described later, and is provided so as to cover the outside of the bag-like body 20. An air hole 14a is formed to communicate the outer side and the outer side.

  Further, the eye plate 17 is fitted in a watertight manner along the upper inner surface of the vertical portion 13 b of the main body 13 via the O-ring 37, and the bag body 20 is located below the upper outer peripheral surface of the eye plate 17. The mouth portion 20a facing toward is fitted and fixed in the circumferential direction by a bag fixing ring 36. The bag-like body 20 is made of a relatively thin-walled resin bag and is in an expanded state in which the internal space is easily expanded or contracted in a state in which the internal space is contracted by air entering and exiting through the mouth portion 20a. It can be deformed. As shown in FIG. 2, the bag-like body 20 is in a contracted state in the initial mounting state of the air withdrawal device 11 and has almost no internal space.

  The eye plate 17 includes a water guide portion 17b that opens downward, and a eye plate portion 17a that includes a plurality of small holes that are continuously formed in the water guide portion 17b. The inner periphery of the lower end of the water guide portion 17b A packing 39 is attached along the surface.

  Furthermore, a water storage part 13c capable of storing drainage is provided in the lower part of the vertical part 13b of the main body 13, and this water storage part 13c is a floating body having an internal structure and has a diameter smaller than the inner diameter of the vertical part 13b and the diameter of the eye plate 17. The float 16 which is a spherical body having a diameter larger than the inner diameter of the water guide portion 17b is accommodated, and has a function of preventing water from entering the bag-like body 20 in an emergency described later.

  Next, operation | movement of the air withdrawal apparatus 11 produced by the flow of waste_water | drain is demonstrated.

  As shown in FIG. 1 and FIG. 3A, the first sealing portion H formed in the first drain trap 7 and the second drain trap 9 formed in the first drain trap 7 in the drain pipe 4. Between the two sealed water portions J, a closed area C that is blocked from the atmosphere is formed. As will be described later, the closed area C is a positive pressure that is higher in air pressure than the atmosphere depending on the flow state of drainage, or The negative pressure is lower than the air pressure.

  As the flow of the drainage from the drainage port 3 toward the sewage pipe (not shown) is completed, the second sealed water portion J on the downstream side is formed, and then the first drainage trap 7 and the first drainage trap 7 from the upstream side are formed. When air flows in between the two drain traps 9 and the upstream first sealed portion H is formed, the closed region C is in a positive pressure state with higher air pressure than the atmosphere. The air in the closed region flows toward the bag-like body 20 communicated through the communication opening K (see the white arrow in the drawing), and the bag-like body 20 is in an inflated expanded state. Buffer the pressure.

  Thus, a positive pressure is generated in the closed region C formed in the drain pipe 4 between the first sealed water part H and the second sealed water part J due to the flow of the drainage in the drain pipe 4. In this case, the internal space of the bag-like body 20 is inflated to save the air in the closed area C, thereby preventing the backflow of air / drainage to the drainage port 3 side, and preventing unpleasant odor and flow noise due to this backflow. it can. Furthermore, the water at the drain port 3 can flow smoothly without resistance.

  In addition, since the volume of the gap N between the cover 14 and the bag-like body 20 contracts as the bag-like body 20 expands, the air that has filled the gap N is released to the outside of the cover 14 through the air holes 14a. (Refer to the black arrow in the figure).

  As shown in FIG. 1 and FIG. 3 (b), in contrast to the above, as the flow of the drainage ends, the upstream first sealed water portion H is formed, and then the first drain trap. When air flows out from between the second drain trap 9 and the second drain trap 9 to the downstream side and the second sealed portion J is formed on the downstream side, the air pressure in the closed region C is lower than the atmosphere. Negative pressure state. The air evacuated in the bag-like body 20 as described above is discharged to the closed region C through the communication opening K (see the white arrow in the drawing), and the bag-like body 20 is contracted. To buffer the pressure.

  Thus, when a negative pressure is generated in the closed area C, the internal space of the bag-like body 20 is contracted, and air is discharged into the closed area C retracted in the internal space. Since the first sealed water portion H or the second sealed water portion J can be retained in a predetermined manner without flowing, the odor in the drainage pipe 4 can be blocked. In addition, by expanding and contracting the internal space of the bag-like body 20 and appropriately changing the volume as described above, the air in the closed region C can be efficiently flowed and the positive pressure and the negative pressure can be buffered. Furthermore, since the air in the closed area C is evacuated to the sealed internal space of the bag-like body 20, the odor of the evacuated air is not leaked to the outside.

  As the bag-like body 20 contracts, the volume of the gap N between the cover 14 and the bag-like body 20 expands, so that air flows into the cover 14 through the air holes 14a to fill the gap N. (See the black arrow in the figure).

  By providing the cover 14 described above, the bag-like body 20 is provided inside the cover 14 having an inner volume larger than that of the inflated bag-like body 20, so that it is not affected at all by the outside of the cover 14. Instead, it can be freely deformed only by the positive pressure or the negative pressure in the closed region C of the drain pipe 4.

  Even if the volume of the gap N between the cover 14 and the bag-like body 20 changes depending on the expanded state or the contracted state of the bag-like body 20, air flows through the gap N through the air holes 14a. Therefore, the bag-like body 20 can be deformed only by the positive pressure or the negative pressure in the closed region C of the drain pipe 4 without being affected by the air pressure in the gap N.

  Further, by preventing the inflow of the waste water to the bag-like body 20 side by the inflow prevention piece 12c described above, only the air in the drain pipe 4 flows toward the bag-like body 20, and can be saved or discharged. Can be secured.

  Furthermore, the air evacuation body of the present embodiment is formed in the bag-like body 20 having the mouth portion 20a directed downward, so that the waste water flowing in the drain pipe 4 is directed downward. Therefore, the deformable volume of the bag-like body 20 formed in a bag shape that easily deforms can be maintained.

  In addition, the above-described eye plate 17 can prevent foreign matter such as dust and hair flowing in the drainage pipe 4 from entering the bag-like body 20, thereby eliminating damage to the bag-like body 20 due to the foreign matter for a long time. Air can be saved or discharged.

  Next, as shown in FIG. 4, an emergency case in which a relatively large amount of drainage flows in the drain pipe 4 will be described. The drain pipe 4 is filled with drainage, and part of the drainage is as described above. Regardless of the protrusion of the inflow prevention piece 12c, the water storage portion 13c provided below the mouth portion 20a of the bag-like body 20 flows into the air withdrawal device 11 through the communication opening K. Stored in the water. As the water level rises in the water storage part 13c, the float 16 abuts along the circumferential direction of the packing 39, and the mouth part 20a of the bag-like body 20 communicating with the water guide part 17b of the eye plate 17 can be closed. It is possible to prevent the drainage from flowing into the bag-like body 20. The water W stored in the water storage section 13c can be discharged out of the air withdrawal device 11 by removing the cap 15 that is detachably screwed.

  Although the embodiments of the present invention have been described with reference to the drawings, the specific configuration is not limited to these embodiments, and modifications and additions within the scope of the present invention are included in the present invention. It is.

  For example, in the said Example, although the air withdrawal apparatus 11 is connected to the vertical pipe 8 upper part in the drain pipe 4, the connection location of an air withdrawal apparatus is the 1st sealing part and the 2nd sealing part. As long as it is a location which communicates with the closed region formed between the two, for example, it may be a horizontal portion of a drain pipe or a curved pipe portion.

  Moreover, in the said Example, the external shape of the air withdrawal apparatus 11 is comprised by the T-shaped pipe joint 12, the main body 13, the cover 14, and the cap 15, The bag-like body 20 as an air withdrawal body in the cover 14 And the float 15 is accommodated in the main body 13, but the configuration of the air withdrawal device only needs to have at least a bag-like body as an air withdrawal body.

  Moreover, in the said Example, although the bag-like body 20 as an air evacuation body consists of a comparatively thin resin bag, the air evacuation body is in an expanded state in which the internal space is expanded or in a contracted state in which the internal space is contracted. For example, the material may be made of rubber, or the bellows type structure may expand or contract the internal space.

  Furthermore, in the said Example, the 1st sealing part H is formed in the 1st drain trap 7 provided in the pipe line of the drain pipe 4, The 2nd drain trap 9 similarly provided in the pipe line Although the second sealed portion J is formed in the second embodiment, the sealed portion is not limited to the one formed on the artificially provided drain trap as described above. It may be formed spontaneously, for example, by a reverse gradient or the like.

It is sectional drawing which shows the whole image of the drain pipe installation in the Example of this invention. It is sectional drawing which shows the attachment initial state of an air withdrawal apparatus. (A) is sectional drawing which shows the expansion state of a bag-like body, (b) is sectional drawing which shows the contraction state of a bag-like body. It is sectional drawing which shows the air-evacuation device at the time of emergency in which a large amount of drainage flows.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Kitchen stand 2 Sink 3 Drain outlet 4 Drain pipe 5 Storage space 6 Door 7 1st drain trap 8 Vertical pipe 9 2nd drain trap 10 Horizontal pipe 11 Air retractor 12 T-shaped pipe joint 12c Inner wall upper part (inflow prevention piece )
13 Main body 13c Water storage part 14 Cover 14a Air hole 15 Cap 16 Float 17 Eye plate 20 Bag-like body (air evacuation body)
20a Mouth part H First sealed part J Second sealed part

Claims (7)

Air evacuation provided in the drain pipe between the first sealed water portion formed downstream of the drain port and the second sealed water portion formed further downstream of the first sealed water portion. A device,
An air evacuation body that communicates with a drain pipe between the first sealed water portion and the second sealed water portion and that can form a sealed internal space;
The air shelter is
When a positive pressure is generated in a closed region formed in the drain pipe between the first sealed water portion and the second sealed water portion, the internal space is expanded by the positive pressure, and the closed region An inflated state that evacuates the air inside,
When a negative pressure is generated in the closed area, the internal space is contracted by the negative pressure, and a contracted state in which the air retracted in the internal space is discharged to the closed area;
An air evacuation device characterized by being deformable.   2. The air withdrawal apparatus according to claim 1, wherein a cover having an inner volume larger than that of the inflated air withdrawal body is provided so as to cover the outside of the air withdrawal body.   The air evacuation device according to claim 2, wherein an air hole is formed in the cover to communicate the outside and the inside of the cover.   4. The air evacuation apparatus according to claim 1, wherein the air evacuation body is formed in a bag-like body having a mouth portion directed downward.   The air evacuation device according to claim 4, wherein a mouth plate for preventing foreign matter from entering the bag-like body is provided at the mouth of the bag-like body.   A water storage part capable of storing drainage is formed below the mouth part of the bag-like body, and the mouth part is larger in diameter than the mouth part and the mouth part is increased by raising the water level of the water storage part. 6. The air evacuation device according to claim 4, wherein a floatable float is accommodated.   The inflow prevention piece which prevents the inflow of the waste_water | drain to the air refusal body side is protrudingly provided in the communicating opening which the said air refusal body communicates from the drain pipe. The air evacuation device described in 1.

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