JP2014119111A - Lower vent valve for drainage - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a removable lower vent valve for drainage that can be connected and installed in the underfloor piping of a hygiene instrumentation, and secures a miniaturized large-capacity intake air flow.SOLUTION: A single screw pipe 5 connected to a drain pipe joint and a main body 1 are formed by a screwed type. When a negative pressure is generated in a drain pipe, a valve body 3 is opened and an outside air is introduced from an air port 2. An annular gap is opened between the main body 1 and a protection lid 6, and the intake air flow higher than a cross section of a connection caliber can be secured. Then, even when the inside of the drain pipe is fully filled with water, the valve body 3 is pushed to the air port 2 by a buoyant material 11 and a spring 10 attached to a valve body lower part, thereby preventing water leakage.

Description

  The present invention relates to a drainage vent valve which is attached to a sanitary appliance drainage pipe associated with a residential building or the like and is used for taking in outside air when a negative pressure is generated in the drainage pipe.

  The sanitary ware is provided with a drain trap (sealed water) such as an S-shape, a P-shape, or a bowl shape in order to prevent malodors and pests coming from the sewer.

  However, if a large amount of drainage flows into the drainage pipe, the inside of the drainage pipe may become negative pressure, and the residual drainage collected in the drainage trap will be pulled into the drainage pipe, resulting in the destruction of the sealing water and There was something that came in.

  In order to prevent the sealing failure of the drain trap, the drain pipe is provided with an extended vent pipe, a loop vent system, or the like.

  In order to protect two or more sanitary appliance drain traps, the loop ventilation method is to connect a vent pipe from between the drainage horizontal main pipe or the most upstream end instrument drainage connection part of the branch pipe and the next downstream instrument drainage connection part. Either branching up and connecting to the extended vent pipe or opening to the outside alone.

  Also, if it is difficult to secure the drainage vent pipe route, install a drain vent valve between the drainage horizontal main pipe or the drainage connection part of the most upstream end of the branch pipe and the drainage connection part of the next downstream instrument. There is also.

  The drainage vent valve referred to above is a valve that closes when the inside of the drain pipe is at static pressure and opens when the inside of the drain pipe becomes negative pressure, thereby preventing the sealing damage of the residual drainage in the drain trap.

  JP 2011-52745 A

  Although such a drainage vent valve is of a small design, a sufficient cross-sectional area is not ensured with respect to the cross-sectional area of the drainage pipe connection diameter, and therefore insufficient ventilation is considered.

  As a recent residential building, the floor height of the building is kept low as shown in Fig. 7 and the ceiling height of the interior is designed to be high, and the sanitary equipment piping on the upper floor is in the ceiling of the lower floor In some cases, it cannot be installed in a desired posture because it is contained in a very narrow space.

  In addition, the vent valve having a structure that can be periodically inspected and cleaned / replaced further increases the shade of the vent valve body, and is difficult to install and inspect.

  In order to solve the above problems, a low-level vent valve for drainage according to the present invention is formed of a connection port connected to a drain pipe and a vent port for introducing outside air, and an annular valve body incorporated in the inside of the main body Stable outside air can be introduced by the automatic opening and closing of No. 3. Insect air is inserted in the vent 2 shown in FIG. 3 to prevent entry of dust and insects when the outside air is introduced, and a single screw pipe 5 is connected to the drain pipe to connect the inner screw socket 4 under the cylindrical main body 1. It is characterized by being attachable and detachable by screwing 5 and 4 in.

  When the pressure in the drain pipe becomes negative, the annular valve body 3 is automatically opened, and a stable and smooth up-and-down motion is possible by installing the guide bar 12.

  A spring 10 for automatically opening and closing is fixed to the annular valve body 3, and the valve body 3 is pressed against an O-ring 8 attached under the vent 2 by the elastic stress of the spring 10. prevent.

  Further, even if the drain pipe becomes full due to some reason, the annular pipe is caused by the elastic force of the spring 10 attached to the annular valve body 3 and the buoyancy action of the buoyancy material 11 attached to the lower part of the valve body 3. By reliably pressing the valve body 3 against the vent, drainage does not leak to the outside.

  By covering the cylindrical cover 1 with the protective lid 6, it is possible to expect a stable valve opening and closing operation for many years without causing insufficient ventilation or odor leakage due to clogging of dust.

  Furthermore, the cylindrical main body 1 and the protective lid 6 in FIG. 3 have a flat structure, and a gap formed between the cylindrical main body 1 and the protective lid 6 has a cross-sectional area larger than the connection port diameter to ensure a large volume of air flow and the vent valve of the present invention of FIG. The height of the main body 20 is extremely low, so that it can be attached even in a narrow space as shown in FIG.

  According to the present invention, it is possible to obtain a low-level vent valve for drainage that automatically opens and closes a valve body, secures a large volume of air flow, and can be attached and detached even in a small space.

  It is a top view of the drainage low level ventilation valve of the example of the present invention.   It is a front view of the waste-water low level vent valve of the Example of this invention.   It is side surface sectional drawing explaining the structure and structure at the time of valve opening of the low drainage vent valve of the Example of this invention.   It is side surface sectional drawing explaining the structure and structure at the time of valve closing of the waste-water low level vent valve of the Example of this invention.   It is a perspective view of the low drainage vent valve of the example of the present invention.   It is a disassembled perspective view of the waste-water low level vent valve of the Example of this invention.   It is the side view showing the relationship between the structure of a residential building, drainage piping, and the drainage low-level ventilation valve of this invention.

DESCRIPTION OF SYMBOLS 1 Main body 2 Ventilation hole 3 Valve body 4 Inner screw socket 5 Single screw pipe 6 Protective lid 7 Post 8 O ring 9 Insect net 10 Spring 11 Buoyant material 12 Guide bar 13 Flat packing 14 Toilet 15 Hand washer 16 Drainage branch 20 Low-level ventilation valve a Beam b Large pull c Pillar d Floor e Lower floor ceiling

Claims (5)

  When a negative pressure is generated in the pipe connected to the drain pipe and drain vent pipe, the annular valve body built in the main body opens by lowering the inside of the cylindrical main body while automatically adjusting the intake air amount. Valves were introduced into the drainage pipe through the annular vent to prevent destruction of drainage traps (sealed water) of the equipment connected to the drainage pipe. The valve body is lifted by the elastic force of the spring, and the valve body is pressed against the O-ring attached to the lower part of the vent to prevent odor leaks from the sewage system and pests coming from inside the drain pipe. Low vent valve for drainage.   Even when a buoyancy material is attached to the lower part of the valve body, and the drain pipe becomes full due to some factor (clogging etc.), the buoyancy material attached to the lower part of the valve body and the elastic force of the spring attached to the lower part of the valve body The low-level vent valve for drainage according to claim 1, which has a structure in which drainage in the drain pipe does not overflow.   The low-level vent valve for drainage according to claim 2, further comprising an insect net attached between the annular vent and a protective lid attached so as to cover the annular vent.   The low-level vent valve for drainage according to claim 3, wherein an inner screw socket attached to the lower portion of the cylindrical main body can be screwed into and removed from a single screw pipe directly connected to a joint connected to a drain pipe.   The low-level vent valve for drainage according to any one of claims 1 to 4, wherein outside air is introduced from the annular vent by raising and lowering the annular valve body.

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