JP7795057B2 - Odor-proof valve structure - Google Patents

Description

The present invention relates to an odor control valve structure in which an odor control valve is installed in a drain pipe that drains wastewater into a grease trap (interceptor) or the like placed on the kitchen floor.

It has been known to install an odor control valve in a drain pipe that drains wastewater into a grease trap or similar device placed on the kitchen floor to prevent odors and pests from entering the kitchen from the grease trap.

JP 2013-104251 A

The odor control valve described in Patent Document 1 above is attached to poured concrete, etc., but attaching and removing the odor control valve is complicated, and the odor control valve cannot be easily attached or removed.

The purpose of this invention is to make it possible to easily attach and detach an odor control valve to a drain pipe.

In one embodiment, an odor control valve structure is provided at the end of a drain pipe, and an L-shaped notch is provided in the wall forming the drain outlet, which proceeds from the downstream end of the wall in an upstream direction and then proceeds in a circumferential direction. The odor control valve has a cylindrical main body having the same outer circumferential dimension as the inner circumferential dimension of the drain outlet, and a lid supported on the main body so as to be swingable in an opening/closing direction relative to the axial direction of the drain pipe , which closes the outlet of the main body. A slip-stop piece is provided at the downstream end of the main body, protruding outward from the outer periphery, and the slip-stop piece and the notch The anti -slip piece is aligned with the drain pipe and inserted into the axial groove of the L-shaped notch , and then rotated circumferentially around the drain pipe to engage with the circumferential groove of the drain pipe , so that the anti-slip piece engages with the notch and is attached.When the anti-slip piece engages with the notch and the odor control valve is attached to the drain outlet, the swing fulcrum of the cover is positioned above the cover, and the anti-slip piece of the odor control valve protrudes from the outer periphery of the wall that forms the drain pipe while engaged with the notch.This is an odor control valve structure.

The odor prevention valve structure of this embodiment allows the odor prevention valve to be easily attached and detached from the drain pipe.

1 is a side view of a grease trap employing an odor prevention valve structure according to an embodiment of the present invention in use; 1A is a view of a grease trap in which an odor prevention valve structure according to one embodiment is employed, viewed from the downstream side, and FIG. 1B is a perspective view of a cover member of a trap device. 1A and 1B are diagrams for explaining the flow of wastewater in a grease trap in which an embodiment of the odor-proof valve structure is adopted, where (a) is a side view of the grease trap and (b) is a plan view of the grease trap. 1A and 1B are diagrams of an embodiment of an odor prevention valve structure, in which FIG. 1A is a perspective view before the odor prevention valve is attached, and FIG. 1B is a perspective view after the odor prevention valve is attached. 4A and 4B are diagrams of an embodiment of the odor prevention valve structure, in which (a) is a longitudinal cross-sectional view of the socket (X-X cross-sectional view in FIG. 4), (b) is a longitudinal cross-sectional view of the odor prevention valve, (c) is a view from the downstream side of the process of attaching the lid to the socket, (d) is a transverse cross-sectional view of the socket (Y-Y cross-sectional view in FIG. 4), (e) is a longitudinal cross-sectional view of the state in which the odor prevention valve has been attached to the socket, and (f) is a view from the downstream side of the state in which the odor prevention valve has been attached to the socket. This is an exploded view of one embodiment of an odor control valve, where (a) is an oblique view of the main body, (b) is an oblique view of the lid, (c) is a longitudinal cross-section of the main body, (d) is a longitudinal cross-section of the lid, (e) is a view of the main body from the downstream side, and (f) is a view of the lid from the downstream side.

First, a grease trap (interceptor) in which an odor prevention valve structure according to one embodiment is employed will be described with reference to the drawings.
As shown in Figure 1, the grease trap 1 is a device that is buried in the floor of a kitchen, for example, to receive wastewater from a drainage channel A installed on the floor, remove oil, grease, solids, etc. from the wastewater, and then discharge it into a sewer B.
In the following description, the drainage channel A side of the grease trap 1 is referred to as the upstream side, and the sewer B side is referred to as the downstream side.

A part of the concrete C on the floor of the kitchen is removed to provide an installation space, and a grease trap 1 is placed in the installation space, and lids D, D are placed above the grease trap 1.
A drain pipe A1 is arranged in the drainage channel A, and an odor control valve 5 is attached to the outlet of the drain pipe A1 leading to the grease trap 1 to prevent unpleasant odors from entering the kitchen.
By opening the lid D, the user can expose the top of the grease trap 1 and perform maintenance such as removing oils, grease and solids that have separated from the wastewater, as well as perform maintenance on the odor control valve 5 attached to the drain outlet of the drain pipe A1.

- Grease trap configuration -
As shown in FIG. 1 , the grease trap 1 of this embodiment includes a main tank 11 , a partition plate 12 , a receiving basket 13 , a trap device 14 , and a cover member 15 .

The main tank 11 that constitutes the grease trap 1 is made of a metal material such as stainless steel, and as shown in Figures 1 and 2(a), is an overall rectangular box-shaped member having an upstream wall 11a located on the upstream side, a downstream wall 11b located on the downstream side, left and right side walls 11c, 11c, and a bottom wall 11d. A drain pipe B1 that connects to sewer B is attached to the lower part of the downstream wall 11b.

The main tank 11 has flanges f on the upstream wall 11a, downstream wall 11b, and the upper ends of the left and right side walls 11c, 11c, and the flanges f are placed on the top surface of the concrete floor C that surrounds the installation space.

The partition plate 12 that constitutes the grease trap 1 is made of a metal material such as stainless steel, and as shown in Figure 1, is a plate-shaped member with a handle 12a on the top.It is attached to the main tank 11 at a position approximately one-third of the way from the upstream wall 11a in the upstream/downstream direction so as to separate the upstream side and downstream side.
The grease trap 1 has a wastewater inlet section 1a formed on the upstream side of the partition plate 12, into which wastewater flows from the drainage channel A, and a separation section 1b formed on the downstream side of the partition plate 12, which separates and retains oils, grease, etc. from the wastewater.

As shown in FIGS. 1 and 2(a), the partition plate 12 is attached in an upwardly detachable manner by partition plate guides 12b, 12b provided on the inner peripheral surfaces of the left and right side walls 11c, 11c of the main tank 11.
A partition plate 12 attached to the main tank 11 separates the wastewater inlet section 1a and the separation section 1b in an upper region and connects them in a lower region.

The receiving basket 13 that constitutes the grease trap 1 is made of a metal material such as stainless steel, and as shown in Figure 1, has a basket portion 131 and a handle 132. It is positioned within the wastewater inlet portion 1a, receives the wastewater flowing in from the drainage channel A, and captures solid matter contained in the wastewater, such as food scraps.

The trap device 14 that constitutes the grease trap 1 is made of a resin material such as polyvinyl chloride, and as shown in Figures 1 and 2(a), can be a bowl trap that has a drain tube 141 with an overflow hole 141a at a predetermined height and a bowl member 142 attached to the top of the drain tube 141 so that the overflow hole 141a of the drain tube 141 is hidden. It is positioned downstream of the separation section 1b, and the lower end of the drain tube 141 is connected to the drain pipe B1.

The cover member 15 that constitutes the grease trap 1 is made of a metal material such as stainless steel, and as shown in Figures 1 and 2, has an upstream wall portion 15a and left and right side wall portions 15c, 15c. It is a roughly U-shaped member in cross section with a height dimension approximately the same as the depth dimension of the main tank 11, and the left and right side wall portions 15c, 15c are missing at their downstream lower ends to form drainage inlets 15d, 15d.

The cover member 15 is positioned so that the downstream ends of the left and right side wall portions 15c, 15c abut or are close to the downstream wall 11b of the main tank 11, covering the trap device 14. Wastewater heading toward the trap device 14 is mainly introduced through drainage inlets 15d, 15d formed at the lower downstream end position, and oils and fats that have floated and separated in the separation section 1b are prevented from being drained beyond the overflow hole 141a of the drainage tube 141 of the trap device 14.
The cover member 15 has handles 15e and 15f on the top, so that it can be removed from the main tank 11 during maintenance.
The overall configuration of the grease trap has been described above.

-Wastewater flow and removal of grease and oil-
Next, the flow of wastewater in the grease trap and the removal of grease will be described.
As shown in Figure 3(a), the wastewater to be treated that has entered through the drainage channel A flows into the wastewater inlet 1a of the grease trap 1 (arrow w1), and solid matter such as food scraps in the wastewater is captured by the receiving basket 13 arranged in the wastewater inlet 1a, after which the wastewater flows out through the drainage hole in the receiving basket 13.

As shown in Figures 3(a) and 3(b), the wastewater flowing out from the drainage hole of the receiving basket 13 flows downward to the wastewater inlet section 1a, passes under the partition plate 12 and enters the separation section 1b (arrow w2), and the oil contained in the wastewater rises to the water surface due to the difference in specific gravity and is separated from the water. The oil separated from the wastewater is stored near the water surface in the separation section 1b.
Furthermore, the relatively small solid matter that passes through the receiving basket 13 settles by gravity and accumulates as sludge on the bottom of the main tank 11, where it is separated from the wastewater.

As shown in Figures 2(a) and 3(a) and (b), the wastewater from which grease and solids have been removed is introduced into the cover member 15 through wastewater inlets 15d, 15d formed on the downstream lower side of the side wall portions 15c, 15c of the cover member 15 covering the trap device 14 (arrow w3).
The wastewater introduced into the cover member 15 flows over the overflow hole 141a of the drain tube 141 of the trap device 14 (arrow w4) and is discharged into the sewer B via the drain tube 141 and the drain pipe B1.
The above has described the flow of wastewater in a grease trap and the removal of grease.

- Odor prevention valve structure -
Next, the odor control valve structure in which an odor control valve is attached to the drain pipe A1 through which wastewater flows into the grease trap 1 will be described with reference to the drawings.

As shown in Figure 4, the odor prevention valve structure of this embodiment includes a socket 9 attached to the end of the drain pipe A1 and an odor prevention valve 5 attached to the inside of the drain outlet of the socket 9.

The socket 9 is made of a resin material such as polyvinyl chloride, and as shown in Figures 4 and 5(a) and (d), is a cylindrical member with an inlet and an outlet, and is provided with a ring-shaped rib 9a that protrudes inward at a predetermined position along its length.

The socket 9 has an L-shaped notch 91 in the wall forming the outlet (drainage port). The notch 91 consists of an entrance passage 91a that runs upstream from the downstream end and an engagement passage 91b that runs circumferentially from the upstream side of the entrance passage 91a toward the bottom of the socket 9. The tip of the engagement passage 91b of the notch 91 reaches the bottom end of the socket 9.

The odor prevention valve 5 is made of a resin material such as polyvinyl chloride, and as shown in Figures 4(a) and 5(b), it has a short, cylindrical main body 51 with an inlet and an outlet and an outer circumferential dimension that is the same as the inner circumferential dimension of the socket 9, and a lid 52 attached to the downstream (outlet) side of the main body 51 to freely open and close the outlet.

As shown in Figures 6(a), (c), and (e), the main body 51 of the odor control valve 5 has an inlet formed on a plane perpendicular to the axis of the main body 51, and an outlet formed on a plane that intersects the plane perpendicular to the axis of the main body 51 at an acute angle, i.e., the outlet of the main body 51 is formed on an oblique plane that is positioned closer to the outlet as it goes from top to bottom.
The main body 51 has a stopper piece 51a, which projects downward from the outlet side end, attached to the lower end of the outlet side by welding or the like.

As shown in Figures 6(b), (d), and (f), the lid portion 52 of the odor control valve 5 has a lid support portion 521 fixed to the upper portion of the outlet end of the main body portion 51 by welding or the like, and a lid body 522 supported on the lid support portion 521 by a hinge 523 so that it can swing freely, and a weight 524 is attached to the lower portion of the lid body 522 by a bolt or the like as necessary.
The lid portion 52 has a shape similar to the shape of the outlet side opening of the main body portion 51, has dimensions larger than the inner diameter dimension of the outlet side opening of the main body portion 51, and has dimensions smaller than the outer diameter dimension of the outlet side of the main body portion 51.

As shown in Figure 5(b), the lid support part 521 of the lid part 52 is fixed to the upper part of the outlet end of the main body part 51, so that the lid body 522, which is supported so as to be able to swing freely on the lid support part 521, abuts against the outlet end edge of the main body part 51 due to its own weight, thereby blocking the outlet of the odor prevention valve 5.

When attaching the odor prevention valve 5 to the socket 9, the user aligns the odor prevention valve 5 so that the anti-slip piece 51a enters the notch 91 formed in the socket 9, as shown in Figure 4(a), and inserts the odor prevention valve 5 from the drain outlet (outlet) of the socket 9 toward the inlet (arrow y1).
In addition, the user can also rotate the odor prevention valve 5 while pressing it upstream while it is half-inserted into the drain outlet of the socket 9 (with the anti-slip piece 51a abutting the outlet side edge of the socket 9), causing the anti-slip piece 51a to enter the notch 91 when it matches the position of the notch 91 formed in the socket 9.

Then, as shown in Figures 5(c) and (e), the user inserts the odor prevention valve 5 into the drain outlet of the socket 9 until the inlet end of the main body 51 of the odor prevention valve 5 abuts the rib 9a formed on the inner circumference of the socket 9.
When the inlet end of the main body 51 of the odor prevention valve 5 abuts against the rib 9a of the socket 9, the anti-slip piece 51a is inserted into the entry path 91a of the notch 91 to a position opposite the entrance of the engagement path 91b.

The user then rotates the odor prevention valve 5 (arrow y2) so that the anti-slip piece 51a enters the engagement path 91b of the notch 91, as shown in Figure 5(c), and then, as shown in Figures 4(b) and 5(f), abuts the anti-slip piece 51a against the tip of the engagement path 91b of the notch 91, thereby attaching the odor prevention valve 5 to the socket 9.

When the odor prevention valve 5 is attached to the socket 9, the anti-slip piece 51a of the odor prevention valve 5 remains in contact with the tip of the engagement path 91b of the notch 91, and further rotation is prevented, thereby positioning the odor prevention valve 5.
When the odor-proof valve 5 is attached to the socket 9, the hinge (swinging fulcrum) 523 supporting the lid body 522 is positioned above the lid body 522, and the slanted end face of the outlet of the main body 51 is blocked by the lid body 522, allowing the lid body 522 to block the outlet and to open smoothly.

-Effects of the odor prevention valve structure of this embodiment-
The odor control valve structure of this embodiment can be easily installed by inserting the odor control valve 5 into the socket 9 connected to the drain pipe A1 and rotating it, without using any fixing means such as screws, and can also be easily removed by performing the opposite operation, making it easy to install and maintain.

In the odor control valve structure of this embodiment, the lid portion 52 is automatically positioned by attaching the odor control valve 5 to the socket 9, so the odor control valve 5 can be easily attached without requiring any special equipment or techniques.
In the odor prevention valve structure of this embodiment, the odor prevention valve 5 is installed by inserting it until it abuts against the rib 9a provided on the inner circumference of the socket 9, so that no gaps or the like are created between the socket 9 and the odor prevention valve 5, and the accumulation of residue inside the socket 9 can be prevented.

-Other embodiments-
The drain outlet that constitutes the odor-proof valve structure is not limited to the socket 9 attached separately to the end of the drain pipe A1, but the end of the drain pipe A1 may be used as the drain outlet of the odor-proof valve structure, or a notch 91 may be provided directly at the end of the drain pipe A1.

The positions of the notch 91 on the socket 9 and the anti-slip piece 51a on the deodorizing valve 5 are not limited to the vicinity of the drain outlet and the lower end of the deodorizing valve 5, but are not particularly limited as long as the deodorizing valve 5 can be attached by inserting and rotating it into the socket 9, and the pivot point of the lid 522 can be positioned above the lid 522 when attached.

There are no restrictions on the materials used for the components that make up the odor prevention valve structure, as long as the material can be attached to a drain outlet and function as an odor prevention valve.
The drain pipes in which the odor control valve is used are not limited to those that drain wastewater into grease traps.

The above describes embodiments of the present invention, but the present invention is not limited to these, and various modifications can be made as long as no contradictions arise.

5: Odor prevention valve, 51: Main body, 51a: Anti-slip piece, 52: Lid, 9: Socket, 9a: Rib, 91: Notch, A1: Drain pipe

Claims (3)

An odor control valve structure in which an odor control valve is provided at the end of a drain pipe,
The wall forming the drain outlet is provided with an L-shaped notch extending from a downstream end of the wall in an upstream direction and then in a circumferential direction;
The odor control valve has a cylindrical main body having the same outer circumferential dimensions as the inner periphery of the drain outlet, and a lid supported on the main body so as to be able to swing freely in the opening and closing direction in the axial direction of the drain pipe , thereby blocking the outlet of the main body. The downstream end of the main body is provided with a stopper piece that protrudes outward from the outer periphery. The stopper piece is aligned with the notch, and inserted into the axial groove of the drain pipe in the L-shaped notch , and then rotated circumferentially around the drain pipe to engage with the circumferential groove of the drain pipe , thereby engaging the stopper piece with the notch and attaching it.
When the stopper piece is engaged with the notch and the odor control valve is attached to the drain outlet, the swing fulcrum of the lid part is positioned above the lid part,
An odor prevention valve structure in which the anti-slip piece of the odor prevention valve protrudes from the outer periphery of the wall forming the drain pipe while engaged with the notch . A socket is attached to the end of the drain pipe;
2. The odor prevention valve structure according to claim 1, wherein the socket forms the drain opening. The odor control valve structure of claim 1 or 2, wherein the drain outlet has a rib protruding inward, and when the odor control valve is attached to the drain outlet, the upstream end face of the main body of the odor control valve abuts against the rib.