JP2022057033A - Duckbill valve - Google Patents

Abstract

To provide a duckbill valve which can reduce a resonance sound which is generated in the vicinity of a tip part at which an outlet part is arranged.SOLUTION: A duckbill valve 100 comprises a first lip part 110 and a second lip part 120 which form an openable and closable outlet part 105 at a tip part 100a. The first lip part and the second lip part are inclined and extended toward a tip side from a base end side so as to come into close contact with each other at tip parts in a state that the outlet part is closed. A first rib 115 protruding in a direction separating from the outlet part is arranged in a region including at least a part of the tip part of the first lip part, and a second rib 125 protruding in the direction separating from the outlet part is arranged in a region including at least a part of the tip part of the second lip part.SELECTED DRAWING: Figure 1

Description

The present invention relates to a Duckbill valve.

In various industrial fields, the Duckbill valve is used as a one-way valve for controlling the flow of fluid. Duckbill valves have various structures depending on the product to be installed and the intended use. For example, in Patent Document 1, the outlet portion of the duckbill valve is formed in order to improve the responsiveness of the duckbill valve (the response speed from the closed state to the open state of the outlet portion due to the inflow of fluid into the duckbill valve). A structure in which a slit (groove) is provided in the beak-shaped lip portion has been proposed.

Japanese Unexamined Patent Publication No. 2019-97651

As described above, one of the performances required for a duckbill valve is, for example, responsiveness, but the duckbill valve may be required to have other performance depending on its specifications, applications, and the like. One of them is "reduction of resonance noise" generated by the inflow of fluid into the duckbill valve.

When fluid flows into the duckbill valve from the base end side of the duckbill valve (the end side opposite to the position where the outlet is provided), near the tip of the duckbill valve formed into a squeezed beak shape. The vibration generated on the proximal end side is amplified, and a larger vibration is generated. This vibration causes resonance noise from the duckbill valve. When the resonance sound is generated from the duckbill valve, it causes discomfort to users and the like who use the device or equipment in which the duckbill valve is incorporated.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a duckbill valve capable of reducing resonance noise generated in the vicinity of a tip portion provided with an outlet portion.

The duckbill valve according to the present invention is a duckbill valve provided with a first lip portion and a second lip portion forming an outlet portion that can be opened and closed at the tip portion, and the first lip portion and the second lip portion are described above. When the outlet portion is closed, the tip portion is inclined and extends from the base end side to the tip end side so as to be in close contact with each other, and the region including at least a part of the tip portion of the first lip portion includes a region. A first rib protruding in a direction away from the outlet portion is provided, and a second rib protruding in a direction away from the outlet portion is provided in a region including at least a part of the tip portion of the second lip portion. Is provided.

According to the duckbill valve of the present invention, when a fluid flows into the duckbill valve, the first rib provided in the first lip portion and the second rib provided in the second lip portion cause the vicinity of the tip portion. The generated vibration can be reduced. Therefore, it is possible to reduce the resonance sound generated due to the vibration.

It is a perspective view which shows the duckbill valve which concerns on embodiment of this invention. It is a side view of a duckbill valve. It is sectional drawing of the duckbill valve along the arrow 3A-3A line of FIG. It is a front view of the duckbill valve with the outlet part closed. It is a front view of the duckbill valve with the outlet part open. It is sectional drawing of the duckbill valve along the arrow 6A-6A line of FIG. It is sectional drawing of the duckbill valve corresponding to FIG. 6 with the outlet part open.

Hereinafter, embodiments of the present invention will be described with reference to the attached drawings. The following description does not limit the technical scope and the meaning of the terms described in the claims. In addition, the dimensional ratios in the drawings are exaggerated for convenience of explanation and may differ from the actual ratios.

1 to 7 are views showing the Duckbill valve 100 according to the embodiment.

1 is a perspective view of the duckbill valve 100, FIG. 2 is a side view of the duckbill valve 100, FIG. 3 is a sectional view of the duckbill valve 100 along the arrow 3A-3A shown in FIG. 1, and FIGS. 4 and 5 are the duckbill valve 100. 6 and 7 are cross-sectional views of the duckbill valve 100 along the line 6A-6A shown in FIG. 1, FIG. 2, FIG. 3, FIG. 4, and FIG. 6 show a state in which the outlet portion 105 of the duckbill valve 100 is closed, and FIGS. 5 and 7 show a state in which the outlet portion 105 of the duckbill valve 100 is open. ing.

In the description of the embodiment, the side of the duckbill valve 100 provided with the outlet portion 105 is referred to as the distal end side, and the side provided with the respective base portions 141 and 142 is referred to as the proximal end side. The "tip portion" described in the specification means a certain range from the most advanced end of the duckbill valve 100 to the proximal end side, and the "base end portion" means the distal end to the distal end of the duckbill valve 100. It means a certain range to the side.

In each drawing attached to the specification, the longitudinal direction of the duckbill valve 100 (the direction in which the flow path 130 shown in FIG. 3 extends) is indicated by an arrow X, and the depth direction (width direction) of the duckbill valve 100 is indicated by an arrow Y. , The height direction (thickness direction) of the duckbill valve 100 is indicated by an arrow Z.

The duckbill valve 100 according to the present embodiment can be used for, for example, industrial machines, electric appliances, and various other machines / appliances, and its specific use is not particularly limited. As an example, the duckbill valve 100 is used as a one-way valve for controlling the movement of a fluid containing a gas (for example, only a gas, a mixed fluid of a gas and a liquid, etc.) by opening and closing the outlet portion 105 of the duckbill valve 100. It can be used. Further, as one of the application examples when the Duckbill valve 100 is used for such an application, control of the movement of steam generated in a rice cooker, which is an electric appliance, can be mentioned.

Hereinafter, the Duckbill valve 100 according to the present embodiment will be described in detail.

<Duckbill valve>
As shown in FIGS. 1, 4, and 5, the duckbill valve 100 is configured as a duckbill valve including a first lip portion 110 and a second lip portion 120 that form an openable / closable outlet portion 105 at the tip portion 100a. There is.

As shown in FIGS. 1 and 2, the first lip portion 110 and the second lip portion 120 are directed from the proximal end side to the distal end side so as to be in close contact with each other at the distal end portion 100a in a state where the outlet portion 105 is closed. It is inclined and extended.

As shown in FIGS. 1, 2, and 4, the region including at least a part of the tip portion 111 of the first lip portion 110 protrudes in the direction away from the outlet portion 105 (upward in FIG. 4). One rib 115 is provided.

The above-mentioned "the first rib 115 is provided in the region including at least a part of the tip portion 111 of the first lip portion 110" means that "the first rib 115 is provided on at least a part of the tip portion 111 of the first lip portion 110". At least a part of it is placed. " The length of the first rib 115 in the depth direction of the first lip portion 110, the length of the first rib 115 in the longitudinal direction, the protrusion length of the first rib 115 in the height direction, and the like are not particularly limited.

As shown in FIGS. 1, 2, and 4, the region including at least a part of the tip portion 121 of the second lip portion 120 protrudes in the direction away from the outlet portion 105 (downward in FIG. 4). Two ribs 125 are provided.

The above-mentioned "the second rib 125 is provided in the region including at least a part of the tip portion 121 of the second lip portion 120" means that "the second rib 125 is provided on at least a part of the tip portion 121 of the second lip portion 120". At least a part of it is placed. " The length of the second rib 125 in the depth direction of the second lip portion 120, the length of the second rib 125 in the longitudinal direction, the protrusion length of the second rib 125 in the height direction, and the like are not particularly limited.

As shown in FIG. 3, the duckbill valve 100 has a flow path 130 (space) extending in the longitudinal direction inside the duckbill valve 100. An inflow port 106 communicating with the flow path 130 is formed at the base end portion 100b of the duckbill valve 100.

In the vicinity of the base end portion 100b of the duckbill valve 100, a first base portion 141 formed in a substantially cylindrical shape and a second base portion 141 arranged on the base end side of the first base portion 141 and spreading outward from the first base portion 141. A base 142 is formed.

As shown in FIGS. 1 and 4, the first lip portion 110 and the second lip portion 120 have substantially symmetrical shapes with respect to the outlet portion 105.

The first lip portion 110 extends from the first base portion 141 side toward the tip portion 100a side and at a predetermined angle toward the second lip portion 120 side. Similarly, the second lip portion 120 is inclined and extends from the first base portion 141 side toward the tip end portion 100a side and toward the first lip portion 110 side at a predetermined angle.

The inclination angle θ1 of the first lip portion 110 and the inclination angle θ2 of the second lip portion 120 (see FIG. 3) are not particularly limited and can be formed in any size.

The length L1 along the longitudinal direction of the first lip portion 110 and the length L2 along the longitudinal direction of the second lip portion 120 (see FIG. 3) are not particularly limited and can be formed in any size.

The left-right dimension L3 (see FIG. 4) of the outlet portion 105 in the closed state is not particularly limited, and can be formed in any size.

There are no particular restrictions on the length, inner diameter, and outer diameter of the first base portion 141 along the longitudinal direction, and the length, inner diameter, and outer diameter of the second base portion 142 along the longitudinal direction. Can be.

In the duckbill valve 100, when a predetermined pressure is applied to the inner wall surfaces of the lip portions 110 and 120 forming the outlet portion 105 by the fluid flowing into the flow path 130 through the inflow port 106, the first lip portion The tip portion 111 of the 110 and the tip portion 121 of the second lip portion 120 are movable so as to be separated from each other, and the outlet portion 105 is opened (see FIGS. 5 and 7). The duckbill valve 100 allows fluid to move through the inlet 106, the flow path 130, and the outlet 105 by opening the outlet 105.

The duckbill valve 100 keeps the lip portions 110 and 120 closed in a state where the predetermined pressure is not applied to the inner wall surfaces of the lip portions 110 and 120 (FIGS. 1, FIG. 2 and FIGS. See 4). This limits the movement of the fluid through the inlet 106, the flow path 130, and the outlet 105.

As described above, the duckbill valve 100 controls the movement and shutoff of the fluid through the duckbill valve 100 by opening and closing the outlet portion 105 according to the pressure of the fluid flowing into the flow path 130.

As shown in FIGS. 1 and 4, in the first lip portion 110, since the first rib portion 115 is provided on the first lip portion 110, the vicinity of the tip portion 111 of the first lip portion 110 is partially filled with meat. It is thickly formed. Therefore, when the outlet portion 105 is opened and the fluid flows out from the flow path 130, it is possible to prevent the vicinity of the tip portion 111 (near the outlet portion 105) from vibrating in the vertical direction (height direction) by the first rib 115. Similarly, the second lip portion 120 suppresses vibration in the vertical direction (height direction) in the vicinity of the tip portion 121 (near the outlet portion 105) by the second rib 125 provided in the second lip portion 120. can. Therefore, the duckbill valve 100 according to the present embodiment can suppress the vibrations of the lip portions 110 and 120 from vibrating and contacting each other while the outlet portion 105 is opened to allow the fluid to flow out, and the vibration is accompanied by the vibration. The generated resonance sound can be reduced.

As shown in FIGS. 1, 4, and 5, the first rib 115 and the second rib 125 are in the left-right direction of the outlet portion 105 (the left-right direction of FIGS. 4 to 7, and the direction orthogonal to the opening / closing direction of the outlet portion 105). It can be provided at least in the region including the substantially center position C1 (in the same direction as the above).

As shown in FIG. 5, the region including the substantially center position C1 in the left-right direction of the outlet portion 105 opens most in the vertical direction when the exit portion 105 opens. Further, when the fluid flows out from the outlet portion 105, a large pressure is applied to the above region as compared with other portions. Therefore, the vibration of the lip portions 110 and 120 becomes large in the vicinity of the above region. In the duckbill valve 100 according to the present embodiment, since the first rib 115 and the second rib 125 are provided in the above region, it is possible to suppress the occurrence of vibration in the above region. Therefore, the resonance sound generated from the duckbill valve 100 can be reduced more effectively.

The range in which the ribs 115 and 125 are provided in the left-right direction of the outlet portion 105 is not particularly limited, but for example, as shown in FIG. 4, it is preferable to provide the ribs 115 and 125 only in the region including the substantially center position C1 and the peripheral portion thereof. By arranging the ribs 115 and 125 at such positions, the resonance sound generated from the lip portions 110 and 120 is reduced, and the portions other than the substantially center position C1 are formed to be unnecessarily thick and each lip. It is possible to prevent the responsiveness of the units 110 and 120 from being impaired.

However, the ribs 115 and 125 may be formed over the entire range of the outlet portion 105 in the left-right direction, for example. Further, a plurality of ribs 115 and 125 may be intermittently arranged at arbitrary positions in the left-right direction of the outlet portion 105 with a gap. When a plurality of ribs 115 and 125 are arranged in the left-right direction of the outlet portion 105, the size and shape may be different for each rib.

As shown in FIGS. 1 and 2, the first rib 115 and the second rib 125 have a substantially total length in the extending direction (the same direction as the longitudinal direction of the duckbill valve 100) of the first lip portion 110 and the second lip portion 120. It extends continuously along. Since the first rib 115 and the second rib 125 are arranged in this way, the duckbill valve 100 can suppress the generation of vibration over the entire length of the lip portions 110 and 120 in the extending direction. Therefore, the resonance sound generated from the duckbill valve 100 can be reduced more effectively.

The ribs 115 and 125 may be formed only in a part of the lip portions 110 and 120 in the extending direction, for example. Further, a plurality of ribs 115 and 125 may be intermittently arranged at arbitrary positions in the extending direction of the lip portions 110 and 120 with a gap. When a plurality of the ribs 115 and 125 are arranged in the extending direction of the lip portions 110 and 120, the size and shape may be different for each rib.

As shown in FIGS. 1 and 4, the first rib 115 and the second rib 125 are provided in a substantially symmetrical shape and a substantially symmetrical position with respect to the outlet portion 105.

As described above, in the present embodiment, as shown in FIGS. 2 and 4, the first rib 115 extends the region including the substantially center position C1 in the left-right direction of the outlet portion 105 and the first lip portion 110. It is formed over almost the entire length in the direction of existence. Further, the second rib 125 is formed over a region including a substantially center position C1 in the left-right direction of the outlet portion 105 and a substantially overall length of the second lip portion 120 in the extending direction. Further, the shapes of the ribs 115 and 125 (cross-sectional shape shown in FIG. 6) have the same shape that is inverted substantially symmetrically with respect to the outlet portion 105.

Since the ribs 115 and 125 are arranged and configured as described above, in the duckbill valve 100, when the fluid flows out from the outlet portion 105, the ribs 115 and 125 are substantially symmetrical to the lip portions 110 and 120. Since the same behavior is exhibited at the position in a direction substantially symmetrical to each other (vertical direction of the outlet portion 105), vibration can be effectively suppressed in each of the lip portions 110 and 120. Therefore, the collision between the lip portions 110 and 120 can be suppressed, and the resonance sound generated by the collision between the two can be further effectively reduced.

As shown in FIGS. 4 and 5, the first rib 115 has a top portion 115a arranged at a position farthest from the first lip portion 110 and a first portion from the top portion 115a in a cross section along the opening / closing direction of the outlet portion 105. It has a first ridge portion 115b and a second ridge portion 115c extending to the outer surface of the lip portion 110.

As described above, the first rib 115 and the second rib 125 have substantially symmetrical shapes in the vertical direction of the outlet portion 105 with respect to the outlet portion 105. Therefore, like the first rib 115, the second rib 125 has a top 125a arranged at a position farthest from the second lip 120 in a cross section along the opening / closing direction of the outlet 105, and a second from the top 125a. It has a first ridge portion 125b and a second ridge portion 125c extending to the outer surface of the lip portion 120 (see FIGS. 4 and 5).

The top portions 115a and 125a of the ribs 115 and 125 form the thickest portion of the lip portions 110 and 120. Therefore, the lip portions 110 and 120 can suppress the vibration of the lip portions 110 and 120 in the vicinity of the top portions 115a and 125a. In particular, in the present embodiment, since the top portions 115a and 125a are arranged at the substantially center positions C1 in the left-right direction of the outlet portion 105 where the vibration can be the largest, the vibrations of the lip portions 110 and 120 are effectively suppressed. can do.

Further, at the ridges 115b, 115c, 125b, 125c of the ribs 115, 125, the wall thickness of the ribs 115, 125 gradually decreases toward the outer surface of the lip portions 110, 120. Therefore, at a position separated from the top portions 115a and 125a in the left-right direction of the outlet portion 105 by a certain distance, the wall thickness of the lip portions 110 and 120 becomes small enough not to affect the responsiveness of the duckbill valve 100. There is. Therefore, the Duckbill valve 100 can effectively suppress the generation of the resonance sound while preventing the deterioration of the responsiveness from being impaired.

As shown in FIGS. 4 and 5, each of the top portions 115a and 125a can be formed into a cross-sectional shape curved in the protruding direction, but the specific shape is not particularly limited. For example, the top portions 115a and 125a may be formed in a rectangular shape. Further, each of the ridges 115b, 115c, 125b, 125c has a cross-sectional shape that is gently curved from each of the tops 115a, 125a toward the outer surface of each of the lip portions 110, 120, but the specific shape is not particularly limited. .. For example, each ridge portion 115b, 115c, 125b, 125c may be formed in a substantially linear shape.

The protruding height H1 of the first rib 115 and the protruding height H2 of the second rib 125 (see FIG. 3) are not particularly limited and can be formed in any size.

As shown in FIGS. 6 and 7, the first rib 115 can be formed of a solid structure made of a resin material integrally formed with the first lip portion 110. For example, the first lip portion 110 and the first rib 115 can be made of a resin material such as ABS or PC. Further, the first lip portion 110 and the first rib 115 can be manufactured by integral molding by a known injection molding or the like.

Further, as shown in FIGS. 6 and 7, the second rib 125 can be formed of a solid structure made of a resin material integrally formed with the second lip portion 120. For example, the second lip portion 120 and the second rib 125 can be made of a resin material such as ABS and PC, similarly to the first lip portion 110 and the first rib 115. Further, the second lip portion 120 and the second rib 125 can be manufactured by integral molding by a known injection molding or the like.

Since the ribs 115 and 125 are integrally formed of the same resin material as the lip portions 110 and 120 as described above, the ribs 115 and 125 are easily provided on the duckbill valve 100 by a method such as integral molding. be able to. Further, since each of the lip portions 110 and 120 has a solid structure made of resin, the ribs 115 and 125 may be broken or the shape may be inadvertently deformed while the duckbill valve 100 is used. Can be prevented. Therefore, the effects of the ribs 115 and 125 can be maintained for a long period of time.

In this embodiment, the first lip portion 110, the first rib 115, the second lip portion 120, the second rib 125, the first base portion 141, and the second base portion 142 are manufactured by integral molding using a resin material. There is. Therefore, the duckbill valve 100 can be easily manufactured and the manufacturing cost can be reduced.

Although the Duckbill valve according to the present invention has been described above through the embodiments, the present invention is not limited to the contents described in the embodiments and can be appropriately modified based on the description of the scope of claims. be.

The shapes (cross-sectional shapes) of the first rib and the second rib are not limited to the shapes shown in the drawings. The first rib and the second rib can be arbitrarily changed as long as they have a portion protruding in a direction away from the outlet portion. Further, the first rib and the second rib do not have to have the same shape (a shape substantially symmetrical in the vertical direction of the outlet portion).

The relative positional relationship between the first rib and the second rib is not particularly limited. For example, each rib does not have to be arranged at a target position with respect to the outlet portion, and can be arranged at an arbitrary position in each lip portion.

Each rib may be configured by a member different from each lip portion, or may be fixed to each rib and arranged. Further, each rib may be partially provided with a gap (cavity) inside. Further, each rib may be made of a material different from that of the duckbill valve.

100 Duckbill valve 100a Duckbill valve tip 100b Duckbill valve base end 105 Outlet 106 Inlet 110 First lip 111 First lip tip 115 First rib 115a First rib top 115b, 115c First Rib ridge 120 Second lip 121 First lip tip 125 Second rib 125a Second rib top 125b, 125c Second rib ridge 30 Flow path 141 First base 142 Second base C1 Exit Left-right center position of

Claims (7)

A duckbill valve having a first lip portion and a second lip portion that form an openable / closable outlet portion at the tip portion.
The first lip portion and the second lip portion extend from the proximal end side toward the distal end side so as to be in close contact with each other at the distal end portion in a state where the outlet portion is closed.
A first rib protruding in a direction away from the outlet portion is provided in a region including at least a part of the tip portion of the first lip portion.
A duckbill valve provided with a second rib protruding in a direction away from the outlet portion in a region including at least a part of the tip portion of the second lip portion. The duckbill valve according to claim 1, wherein the first rib and the second rib are provided at least in a region including a substantially center position in the left-right direction of the outlet portion. The duckbill according to claim 1 or 2, wherein the first rib and the second rib continuously extend along a substantially overall length in the extending direction of the first lip portion and the second lip portion. valve. The duckbill valve according to any one of claims 1 to 3, wherein the first rib and the second rib are provided in a substantially symmetrical shape and a substantially symmetrical position with respect to the outlet portion. The first rib and the second rib extend from the top to the outer surface of each lip in a cross section along the opening / closing direction of the outlet, at a position farthest from each lip. The duckbill valve according to any one of claims 1 to 4, which has a ridge and a ridge. The first rib has a solid structure made of a resin material integrally formed with the first lip portion.
The duckbill valve according to any one of claims 1 to 5, wherein the second rib has a solid structure made of a resin material integrally formed with the second lip portion. The Duckbill valve according to any one of claims 1 to 6, which controls the movement of a fluid containing a gas with the opening and closing of the outlet portion.

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