JP2011033159A - Body of check valve and check valve - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a check valve body adopting a folding forefront unlikely to open and close even if the wind intrudes from outside and reducing the noise resulting from opening and closing of the folding forefront, while securing the fluid discharging function as it is, and to provide a check valve equipped with such a body and attached to a drain pipe so as to reduce the noise due to winds intruding from the outside. <P>SOLUTION: The check valve body 1 has a flexible valve element 20 including a hollow cylinder 21 formed from a resilient material and joining with the flow passage of a lead-in part 10, tapered surfaces 21a formed on the opposing two surfaces of the hollow cylinder 21, folding forefront 22 arranged so that the inner wall surfaces of the forefront parts of the tapered surfaces 21a abut thereto and a convex folding part 22a is protruded toward one of the tapered surfaces 21a so as to form a flat shape. The invention aims also at a check valve 1 equipped with such a check valve body 1. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a check valve body that allows a fluid to flow in one way and a check valve equipped with such a check valve body.

  As conventional techniques related to the check valve main body and the check valve, for example, Patent Document 1 (Japanese Utility Model Publication No. 60-24788, name of device “drainage body”) and Patent Document 2 (Registered Utility Model No. 3010030). What is disclosed by the name of the gazette and device “intermittent drain valve”) is known. These flexible valve bodies have a curved semi-circular bent tip, and when a predetermined amount of drainage accumulates inside the flexible valve body, the bent tip is released to drain the drainage downward, After the end of the outflow, it is restored by the elasticity of its own material and the bent tip is returned to the contact state.

Japanese Utility Model Publication No. 60-24788 (FIGS. 1, 2, and 3) Registered Utility Model No. 3010030 (FIGS. 1, 2 and 3)

  However, when the drainage body of the prior art described in Patent Document 1 and Patent Document 2 is installed as a check valve of an air conditioner such as a room air conditioner in a highly airtight apartment, for example, the indoor side and the outdoor side Noise caused by the blowing of wind due to the difference in atmospheric pressure (vibration noise that causes the bending tip to flutter with the wind pressure) and noise caused by the slight opening and closing of the bending tip due to the blowing of the wind (drain) Resonance noise in the hose often passes through the open / close location).

Therefore, the present invention has been made in view of the above-described problems, and the object thereof is to bend by adopting a bending tip portion that ensures the fluid discharge function as it is and does not easily open and close even when wind enters from the outside. An object of the present invention is to provide a check valve body that reduces noise caused by opening and closing of the tip.
Another object of the present invention is to provide a check valve which is mounted with this check valve body and which is attached to a drain pipe and reduces noise caused by wind entering from the outside.

The check valve body according to claim 1 of the present invention is:
An introduction part having a flow path communicating with the opening;
A hollow cylinder formed of an elastic body and connected to the flow path of the introduction part, a tapered surface formed on two opposing surfaces of the hollow cylinder, and an inner wall surface at the tip of the tapered surface abut one of the taper surface directions A flexible valve body having a bent tip portion that is formed so that a mountain fold portion protrudes into a flat shape, and
With
The bending tip of the flexible valve body releases the inner wall surface when a predetermined amount of fluid flows into the flexible valve body, and the fluid flows out to the outside. After the outflow ends, the bending tip part contacts the inner wall surface. It is characterized in that it is restored to the restored state.

A check valve body according to claim 2 of the present invention is
In the check valve body according to claim 1,
The bent tip portion formed in the flexible valve body is provided with a mountain fold portion bent in a substantially L shape with respect to the tapered surface of the hollow cylinder.

A check valve body according to claim 3 of the present invention is
In the check valve body according to claim 1,
The bent front end portion formed on the flexible valve body is provided with a mountain fold portion bent in a zigzag manner with respect to the tapered surface of the hollow cylinder.

A check valve body according to claim 4 of the present invention is
In the check valve body according to any one of claims 1 to 3,
The flexible valve body is formed with different thicknesses on the introduction portion side and the bent tip portion side of the hollow cylinder.

A check valve body according to claim 5 of the present invention is
In the check valve body according to any one of claims 1 to 3,
The flexible valve body is formed such that the hollow cylinder is thicker than the bent tip.

A check valve body according to claim 6 of the present invention is
In the check valve body according to any one of claims 1 to 5,
The introduction part and the flexible valve body are integrally formed of an elastic body.

A check valve body according to claim 7 of the present invention is
In the check valve body according to any one of claims 1 to 5,
The introduction part is formed of a hard material or an elastic body,
The flexible valve body is formed of an elastic body,
The introduction part and the flexible valve body are connected and combined.

A check valve according to claim 8 of the present invention is
An upper case having an annular protrusion on the inner peripheral surface protruding in a direction perpendicular to the cylindrical axis;
A lower case that can be detachably screwed into the upper case;
A check valve body according to any one of claims 1 to 7,
With
The flange portion of the check valve body is sandwiched and fixed integrally between a lower end surface of the annular protrusion of the upper case and an upper end surface of the lower case.

A check valve according to claim 9 of the present invention is
An upper case having an annular protrusion on the inner peripheral surface protruding in a direction perpendicular to the cylindrical axis;
A lower case that is detachably fitted in and fixed to the upper case;
A check valve body according to any one of claims 1 to 7,
With
The flange portion of the check valve body is sandwiched and fixed integrally between a lower end surface of the annular protrusion of the upper case and an upper end surface of the lower case.

A check valve according to claim 10 of the present invention is
The check valve according to claim 8 or 9,
The upper case and the lower case are made of a hard material.

A check valve according to claim 11 of the present invention is
The check valve according to claim 8 or 9,
The upper case and the lower case are formed of heat-resistant plastic.

According to the present invention, the check valve main body that reduces the noise caused by opening and closing of the bent tip by adopting the bent tip that is difficult to open and close even when wind enters from outside while ensuring the fluid discharge function as it is. Can be provided.
Moreover, the check valve main body can be mounted, and a check valve can be provided which is attached to the drain pipe and reduces noise caused by wind entering from the outside.

1 is a perspective external view of a check valve body according to an embodiment for carrying out the present invention. It is AA sectional drawing of the non-return valve main body of the form for implementing this invention. It is explanatory drawing of the outflow of the fluid by the non-return valve main body of the form for implementing this invention. It is explanatory drawing of the bending front-end | tip part of the non-return valve main body of the form for implementing this invention, Fig.4 (a) is explanatory drawing of a 1st bending front-end | tip part, FIG.4 (b) is the 2nd bending front-end | tip. It is explanatory drawing of a part. It is explanatory drawing of the non-return valve of the form for implementing this invention, Fig.5 (a) is a top view, FIG.5 (b) is a front view, FIG.5 (c) is sectional drawing. It is explanatory drawing of use of the non-return valve of the form for implementing this invention.

Subsequently, a check valve body and a check valve according to an embodiment for carrying out the present invention will be described below with reference to the drawings. First, the check valve body will be described with reference to the drawings.
As shown in FIG. 1, the check valve main body 1 roughly includes an introduction portion 10 and a flexible valve body 20.

The introduction part 10 has a flange structure and includes a flange part 11 and a cylinder part 12.
The flange portion 11 is an annular body and has an opening 11a.
The cylindrical part 12 is formed in a hollow cylindrical shape, the flange part 11 is connected, and the opening part 11a of the flange part 11 is connected to the internal space of the hollow cylinder.

The flexible valve body 20 includes a hollow cylinder 21 and a bent distal end portion 22, and is provided in connection with the introduction portion 10.
The hollow cylinder 21 is a hollow body that communicates with the cylinder portion 12, and further includes a tapered surface 21a and a side surface 21b. The hollow internal space by the hollow cylinder 21 tapers as it goes downward along the tapered surface 21a, and becomes a substantially linear space at the tip.
The bent tip 22 is formed so that the flow path communicating with the hollow cylinder 21 is substantially linear. The bent front end portion 22 is substantially L-shaped when viewed from the side, and has a mountain fold portion 22a having a straight ridge line when viewed from the front, and the mountain fold portion 22a is on the one tapered surface 21a side. It is formed to protrude. For example, as shown in FIG. 4A, the mountain fold portion 22a is configured such that the mountain fold portion 22a extends substantially at right angles to the flow direction a (gravity direction a). Moreover, as shown in FIG.4 (b), it comprises so that the mountain fold part 22a may incline with respect to the flow direction a (gravity direction a). As will be described later, the bent distal end portion 22 has a function of opening and uncovering when the fluid flows, and returning to the original substantially L-shaped shape due to its own elasticity after the fluid flows out and reattaching.

  In the flexible valve body 20, the thickness of the bent tip portion 22 is thin, and the thickness of the hollow cylinder 21 is thicker than the thickness of the bent tip portion 22. In particular, the use of the thick hollow cylinder 21 stabilizes the structure of the hollow cylinder 21 that is normally flat and unstable. Further, the thick hollow cylinder 21 provides a structural reinforcing action and a shape stabilizing action to the tapered surface 21 and the bent distal end portion 22 subsequent thereto.

  Moreover, the flexible valve body 20 is further thickened such that the material thickness on the upper side (introduction portion 10 side) is 0.5 mm, for example, with the substantially central horizontal portion of the tapered surface 21a as a boundary instead of the above structure. In addition, the material thickness on the lower side (bending tip side) is 0.3 mm, particularly on the introduction portion 10 side, and the hollow cylinder 21 is configured with a different elastic body thickness. You may do it. In addition, the bent tip 22 may have a material thickness of 0.3 mm or thinner 0.2 mm. In this manner, the upper side of the tapered surface is configured to have a material thickness larger than that of the lower side, so that the upper side (introducing portion 10 side) has a stronger structure and the lower side (bending tip portion 22 side) has elasticity. The flexible valve body 20 is easily held in shape, and the opening / closing operation of the bent distal end portion 22 is ensured.

  Furthermore, the flexible valve body 20 is made of the flexible valve body 20 in particular such that the material thickness of the hollow cylinder 21 is constant, such as 0.5 mm, and the material thickness of the bent tip 22 is 0.3 mm. You may comprise so that it may become a stable structure by employ | adopting thick wall thickness. Thus, by configuring the flexible valve body 20 so that the material thickness is larger than that of the bent tip portion 22, the opening and closing operation of the bent tip portion 22 is ensured while making it easy to maintain the shape of the flexible valve body 20 as a whole. .

Next, manufacture of the check valve body 1 will be described.
The introduction part 10 and the flexible valve body 20 may have different configurations manufactured separately and may be combined. Since the introduction part 10 does not need to be mechanically deformed, it can be formed of either a hard material or an elastic body. On the other hand, the flexible valve body 20 needs to be formed of an elastic body in order to mechanically deform the bent distal end portion 22 when the fluid passes.
Furthermore, the flexible valve body 20 may also be formed in a cylindrical shape by laminating various sheet-like elastic bodies and performing a heat bonding process, a pressing process, or the like.

Moreover, you may manufacture the introduction part 10 and the flexible valve body 20 integrally. In this case, since the flexible valve body 20 is limited to an elastic body, the introduction section 10 is also an elastic body.
The introduction portion 10 and the flexible valve body 20 may be integrally formed with various elastic bodies including synthetic resin such as synthetic rubber and plastic as well as rubber mainly composed of natural rubber.

  Although these configurations are selected as appropriate, in this embodiment, a synthetic resin such as a polyester resin having relatively elasticity is cast into a mold and cured, so that the introduction portion 10 and the flexible valve body 20 are integrated. It is molded.

Subsequently, the function of the check valve body 1 will be described.
Even if a predetermined amount of fluid (for example, drainage) flows into the flexible valve body 20 through the introduction portion 10, the fluid flows to the linear bottom portion of FIG. 4A or the inclined bottom portion of FIG. 4B. At the beginning of accumulation, the bent tip 22 immediately accumulates fluid without undressing, and when a predetermined amount is accumulated, a deep water portion and a shallow water portion are generated. Since the hollow cylinder 21 is formed to be tapered toward the bottom by the tapered surface 21a, a large water pressure is applied to the deep water portion as the fluid is accumulated.

  Thus, when the water pressure generated by the weight of the fluid flowing from the shallow water portion side to the deep water portion formed by the water gradient exceeds a predetermined pressure, the surface from the deep water portion (that is, the connecting portion between the hollow body 21 and the bent tip portion 22) As shown in FIG. 3, the inner wall surface contact is released and the drainage is discharged to the outside. Then, after the discharge is finished, the bent tip 22 has a function of restoring to the flexible valve body 20 having a shape in contact with the inner wall surface. At this time, if the inclined shape as shown in FIG. 4 (b) is used instead of the normal bottom as shown in FIG. 4 (a), the pressure when the fluid is accumulated at the bottom of the inclined portion is the highest. Can be solved. In this way, the inner wall surface contact of the bent tip 22 can be smoothly opened and restored.

  Also, in the above case, if the fluid exceeds a predetermined pressure even if the fluid is a gas, the folding tip 22 releases the inner wall surface and causes the fluid to flow out, and when the pressure falls below the bending tip 22 contacts the inner wall. It has a function of restoring the shape of the flexible valve body 20. In this way, the inner wall surface contact of the bent tip 22 can be smoothly opened and restored. Fluid discharge functions regardless of liquid or gas.

  Further, the wind may blow from the lower side toward the bent tip end portion 22 of the check valve body 1. For example, the check valve body 1 is installed between the outdoor unit and the indoor unit of the air conditioner, and the wind pressure is applied to the flexible valve body 20 that is generated when strong wind blows from the outdoor unit. Even in such a case, the bent tip 22 is an elastic body and has an approximately L-shaped shape that is easy to bend, so that the wind can be circulated by the bend and the surface is not undressed by vibration or the like. As a result, it is possible to remarkably reduce the probability that vibration sound or resonance sound caused by wind pressure on the flexible main body 20 is generated. Such an effect is that the hollow cylinder 21 and the bent tip portion 22 of the flexible valve body 20 are structurally different from each other in that the thickness of the thick portion of the elastic body is different, and the flat and unstable tapered surface and the subsequent bent tip portion. This also contributes to the effect of reinforcing the shape and stabilizing the shape. These effects are combined synergistically to form a bent tip 22 that is wind resistant.

  Subsequently, an improved form of the present embodiment described above will be described. In this improved embodiment, only the bent tip 22 formed on the flexible valve body 20 is different. In the previous form, as shown in FIGS. 1 and 2, a substantially L-shaped bent portion is used. However, in this embodiment, the substantially L-shaped bent portion is provided at a plurality of locations (usually at two locations) in opposite directions. It is sufficient, but it may be a large number such as 3 or 4), that is, if it is provided in a zigzag shape (zigzag folded shape) when viewed from the side surface, more surface areas will be formed. It is not easy to undress the part, and in particular, it becomes easier to prevent the inflow of air from the outdoor side to the indoor side due to the pressure difference due to the exhaust of the outdoor unit. Such a configuration may be adopted. Further, the mountain folds 22a may also be formed in the horizontal direction as shown in FIG. 4 (a) or in the inclined direction as shown in FIG. 4 (b). Such a bent tip 22 is achieved by making only the bent tips 22 of the various forms described above different.

Next, the check valve 100 will be described.
As an example of using the check valve main body 1 described above, a check valve 100 is mounted in a case as shown in FIG. 4 and is made of styrene resin (specifically, Nippon Steel Chemical Co., Ltd.). The upper case 101, the lower case 102, and the spacer 103 are made of a hard synthetic resin such as a company registered trademark (ethylene resin). An annular support portion is provided on the inner peripheral surface of the upper case 101 in a direction perpendicular to the cylindrical axis. Between the lower end surface of the annular support portion and the spacer 103 on the upper end surface of the lower case 102 to be inserted. The flange part 11 is clamped and fixed. By adopting such a structure, it can be used in accordance with drain pipes having different diameters by being housed in various size cases. The check valve 100 houses the check valve main body 1 in a substantially cylindrical case that is detachable. Note that the spacer 103 may be removed and the flange portion 11 may be sandwiched and fixed between the lower end surface of the annular support portion on the inner peripheral surface of the upper case 101 and the upper end surface of the lower case 102 to be inserted. good.

  Then, a protrusion 101a having an inverted cross section ▽ shape is provided over the entire circumference of the lower end surface of the annular support portion, and the upper surface of the flange portion 11 is pressed in an annular shape locally at the tip of the ▽ shape protrusion 101a. In the main body, the flexible valve body 20 is firmly fixed and water leakage (gas) is ensured.

  Although the upper case 101 and the lower case 102 are attached and detached, a fitting method in which the upper case 101 and the lower case 102 are each provided with a claw-like uneven portion may be employed. Moreover, you may employ | adopt the screwing system which provided the male-female screw part in the upper case 101 and the lower case 102. FIG. What is necessary is just to employ | adopt the attachment / detachment method suitably.

  Then, as shown in FIG. 5, the upper and lower sides of the check valve 100 are inserted into the drain pipes 200 and 300, and are fixed using vinyl tape or the like (not shown) as appropriate. The lower drain pipe 300 communicates with, for example, an outdoor unit of an air conditioner, and strong wind or the like may enter through the outdoor unit and wind may enter from the lower side of the check valve 100. However, noise is eliminated for the reason described above. .

  In such a check valve 100, the fluid is described as air. However, in addition to the heat-resistant flexible valve body 20, if a case main body molded from heat-resistant plastic is used, a kitchen that drains hot water, Alternatively, it can be used for draining hot water or other hot water drains.

The check valve body and check valve of the present invention have been described above.
According to the present invention as described above, the drainage drainage can be smoothly discharged by reducing troublesome noise while reducing costs by reducing the number of parts by reducing the number of parts only by performing a slight bending process. A check valve body and a check valve can be provided.

  The check valve main body and check valve of the present invention can be applied particularly to the prevention of malodor and small animal intrusion from the water distribution pipe, the prevention of freezing of the defrost pipe of the unit cooler, and the maintenance of each set temperature of the multi-room freezer. . The check valve main body and the check valve of the present invention can be particularly suitably applied as a trap used for drainage of air conditioning equipment such as a room air conditioner.

1: Check valve body 10: Introduction portion 11: Flange portion 11a: Opening portion 12: Tube portion 20: Flexible valve body 21: Hollow tube 21a: Tapered surface 21b: Side surface 22: Bending tip portion 22a: Mountain fold portion 100: Check valve 101: upper case 101a: protrusion 102: lower case 103: spacer 200, 300: drain pipe

Claims (11)

An introduction part having a flow path communicating with the opening;
A hollow cylinder formed of an elastic body and connected to the flow path of the introduction part, a tapered surface formed on two opposing surfaces of the hollow cylinder, and an inner wall surface at the tip of the tapered surface abut one of the taper surface directions A flexible valve body having a bent tip portion that is formed so that a mountain fold portion protrudes into a flat shape, and
With
The bent leading end of the flexible valve body releases the inner wall surface when a predetermined amount of fluid flows into the flexible valve body, and the fluid flows out to the outside. A check valve body, wherein the check valve body is restored. In the check valve body according to claim 1,
The check valve body is characterized in that a bent tip portion formed on the flexible valve body is provided with a mountain fold portion bent in a substantially L shape with respect to the tapered surface of the hollow cylinder. In the check valve body according to claim 1,
The check valve main body is characterized in that a bent front end portion formed on the flexible valve body is provided with a mountain fold portion bent in a zigzag manner with respect to the tapered surface of the hollow cylinder. In the check valve body according to any one of claims 1 to 3,
The check valve body is characterized in that the flexible valve body is formed with different thicknesses on the introduction part side and the bent tip part side of the hollow cylinder. In the check valve body according to any one of claims 1 to 3,
The check valve body is characterized in that the flexible valve body is formed so that the hollow cylinder is thicker than the bent tip. In the check valve body according to any one of claims 1 to 5,
A check valve main body, wherein the introduction part and the flexible valve body are integrally molded by an elastic body. In the check valve body according to any one of claims 1 to 5,
The introduction part is formed of a hard material or an elastic body,
The flexible valve body is formed of an elastic body,
A check valve body, wherein the introduction part and the flexible valve body are connected and combined. An upper case having an annular protrusion on the inner peripheral surface protruding in a direction perpendicular to the cylindrical axis;
A lower case that can be detachably screwed into the upper case;
A check valve body according to any one of claims 1 to 7,
With
The check is characterized in that the flange portion of the check valve body is sandwiched and fixed integrally between a lower end surface of the annular protrusion of the upper case and an upper end surface of the lower case. valve. An upper case having an annular protrusion on the inner peripheral surface protruding in a direction perpendicular to the cylindrical axis;
A lower case that is detachably fitted in and fixed to the upper case;
A check valve body according to any one of claims 1 to 7,
With
The check is characterized in that the flange portion of the check valve body is sandwiched and fixed integrally between a lower end surface of the annular protrusion of the upper case and an upper end surface of the lower case. valve. The check valve according to claim 8 or 9,
The check valve according to claim 1, wherein the upper case and the lower case are made of a hard material. The check valve according to claim 8 or 9,
The check valve according to claim 1, wherein the upper case and the lower case are made of heat resistant plastic.

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