JP3131732B2 - Fluid flow control valve - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluid flow control valve, and more particularly, to a fluid flow control valve for controlling the flow of a fluid.

[0002]

2. Description of the Related Art FIGS. 11 and 12 are a perspective view and a sectional view schematically showing how a dam plate for adjusting a water level of a rice field is attached. Referring to FIGS. 11 and 12, a drainage channel is usually provided around a rice field with a bank interposed therebetween. The bank is provided with a drain hole 100 for guiding water drawn into the rice field to a drainage channel, and a weir plate 101 is attached so as to cover the opening of the drainage hole 100. The mounting of the weir plate 101 is performed by partially inserting the weir plate 101 into soil or a bank in a rice field.

[0003] The weir plate 101 plays a role in keeping the water level in the rice field constant. In other words, the water level in the rice field is
When the height exceeds 1, the water in the rice field passes through the weir plate 101 and enters the drain hole 100 along the arrow shown in FIG. This prevents the water level in the rice field from being higher than the height of the weir plate 101.

If it is desired to keep the water level high in accordance with the growth of the seedlings, the weir plate 10 is required as shown by the dashed line in FIG.
By slightly raising 1, it becomes possible to maintain the water level high.

[0005]

However, when the water level is adjusted using such a weir plate 101, there is a problem that a great deal of labor is required for monitoring the water level of the drainage channel. Hereinafter, this will be described in detail.

On a rainy day or the like, the water level of the drainage channel may be higher than that of the weir plate 101 as shown in FIG. In addition, when the rice field is at an altitude of 0 m or less and the drainage channel leads to the sea, seawater may flow backward to the drainage channel, and the water level of the drainage channel may be higher than the weir plate 101.

In such a case, the water in the drainage canal is
As shown by the arrow, the water flows back into the rice field through the drain hole 100. As a result, the water level in the rice field rises, which adversely affects the growth of the seedlings. In particular, when seawater flows back into the rice field, the seedlings may be damaged by salt.

In order to prevent the backflow into the rice field, the drain hole 100 is filled with vinyl or the like and the drain hole 100 is filled.
Need to be closed. For this reason, on a rainy day or the like, the monitoring of the water level of the drainage channel is required, and a great deal of labor is required.

Therefore, an object of the present invention is to provide a fluid flow control valve element which can automatically prevent backflow of water from a drainage channel to a rice field even on a rainy day, thereby reducing labor. It is.

[0010]

[0011]

[0012]

Means for Solving the Problems] flow fluid flow control valve element of the present invention, there is provided a fluid flow control valve element for controlling the flow of fluid, a cylindrical body, a flexible bag-like member , A floating member. The cylinder has openings at both ends, and allows fluid to pass between one end and the other end. The flexible bag-shaped member has openings at both ends, and allows fluid to pass between one end and the other end. The other end of the tubular body and the other end of the flexible bag-shaped member are joined so that the internal space of the tubular body and the flexible bag-shaped member communicate with each other. The floating member has a through-hole, is attached to one end of the flexible bag-shaped member such that the through-hole communicates with the internal space of the flexible bag-shaped member, and is made of a material that floats on a fluid.

[0013] In the flow fluid flow control valve element of the present invention, when one end side of the pressure of the external fluid of the cylinder is greater than the pressure at one end of the external fluid of the flexible bag-like member is of cylindrical body Possible from one end
Fluid flows to one end of the flexible bag. On the other hand, a flexible bag-like when one end side of the pressure of the external fluid of the member is greater than the pressure at one end of the external fluid of the cylindrical body, the flexible bag member浮部member attached to one end of the fluid Therefore, fluid does not enter the flexible bag-shaped member from the through hole of the floating member. Therefore, the backflow of the fluid from one end of the flexible bag-shaped member to one end of the cylindrical body is automatically prevented. Since the flow of the fluid can be automatically controlled in this manner, if this fluid flow control valve is installed, it is not necessary to monitor the amount of fluid in the drain, and labor can be greatly reduced. it can.

[0014] Preferably, in the above aspect, and a container having a hole communicating from the inside to the outside is further provided for fluid flow, floating member is located inside the container, and one end of the cylinder is located outside the container As described above, the cylinder is supported by the container.

This facilitates the mounting of the fluid flow control valve element. Preferably, in the above aspect, at least one of the end of the cylindrical body and the through hole of the floating member is further provided with a filter for removing foreign matter.

Thus, foreign substances can be removed by the filter. In the above aspect, preferably, the cylinder is L
It has the shape of a shape.

Preferably, in the above aspect, the cylinder is rotatably supported by the container.

[0018]

Embodiments of the present invention will be described below with reference to the drawings.

[0019] Reference Example Figure 1 is a perspective view schematically showing the structure of a fluid flow control valve element in the reference example of the present invention. With reference to FIG. 1, a fluid flow control valve element 1 has a substantially L-shaped cylinder 2 and a lid 3 rotatably attached to an end 2 b of the cylinder 2. The tubular body 2 has a through hole communicating from one end 2a to the other end 2b, and the lid 3 can rotate so that the open end of the end 2b of the tubular body 2 can be opened and closed.

Such a fluid flow control valve element is installed in a rice field, for example, as shown in FIG.

Referring to FIG. 2, a fluid flow control valve element 1 is
The cylindrical body 2 is attached to the container 5 such that one end 2a is located outside the container 5 and the other end 2b that can be opened and closed by the lid 3 is located inside the container 5. The container 5 is installed such that the hole 5 b of the container 5 communicates with the drain hole 100. The upper end of the container 5 may be opened and closed by a lid 6.

In the installed state, the fluid flow control valve element 1 of the present embodiment controls the flow of the fluid as shown in FIGS.

First, referring to FIG. 2, when the water level of the rice field becomes higher than the position of one end 2a of the cylindrical body 2, the water pressure in the rice field becomes higher than the water pressure in the container 5. The lid 3 is pushed by the water pressure on the rice field side, and the other end 2b of the cylinder 2 is opened. Thereby, the water in the rice field once flows into the container 5 through the cylindrical body 2 and then flows into the drain hole 10.
Flows into drainage through 0.

Referring to FIG. 3, on the other hand, when the water level in the drainage channel is higher than the water level in the rice field, the water pressure in the drainage channel becomes higher than the water pressure in the rice field. Higher. In this case, since the lid 3 of the fluid flow control valve 1 is pressed against the other end 2b of the cylinder 2 by the water pressure in the container 5, the other end 2b of the cylinder 2 is closed. This makes it impossible for the water in the container 5 to flow out to the rice field side, and prevents the water from automatically flowing back to the rice field side.

As described above, by using the fluid flow control valve element 1 of the reference example , the water in the rice field can be made to flow out to the drainage channel, and the water in the drainage channel can be made to flow back to the rice field side. Can be prevented. For this reason, even if the water level of the drainage channel rises above the rice field on a rainy day, the water is prevented from automatically flowing backward from the drainage channel side to the rice field side,
This eliminates the need to monitor the water level of the drainage channel each time, thus greatly reducing labor.

[0026] Embodiment FIG. 4 is a perspective view schematically showing the structure of a fluid flow control valve element which definitive to form state of an embodiment of the present invention. Referring to FIG. 4, a fluid flow control valve element 11 includes a cylinder 12, a flexible bag-shaped member 13, and a floating member 14. The cylinder 12 is
It has a substantially L-shape, from one end 12a to the other end 12b
It has a through-hole leading to the outside. The flexible bag-like member 13
For example, it is made of vinyl or the like, and has a bag shape opened at both ends of one end 13a and the other end 13b. One end 13a of the bag-shaped member 13 is connected to the other end 12b of the cylindrical body 12.
The through hole of the cylindrical body 12 and the inside of the bag-shaped member 13 communicate with each other. The floating member 14 is made of a material that floats on a fluid (for example, water), for example, styrene foam, and has a through hole 14a. The through hole 14a of the floating member 14 is
The floating member 14 is attached to the other end 13 b of the flexible bag-shaped member 13 so as to communicate with the inside of the flexible bag 3.

Such a fluid flow control valve element 11 is installed in a rice field, for example, as shown in FIG.

Referring to FIG. 5, valve element 11 for controlling fluid flow
Is mounted on the container 5 such that one end 12a of the cylindrical body 12 is located outside the container 5 and the opening 14a of the floating member 14 is located inside the container 5. This container 5
Is installed such that the hole 5b of the container 5 communicates with the drain hole 100 provided on the bank. The upper end of the container 5 may be opened and closed by a lid 6.

In the installed state, the fluid flow control valve element 11 of the present embodiment controls the flow of the fluid as shown in FIGS.

Referring to FIG. 5, the water level of the rice field is
When the water in the paddy field becomes higher than the position of the one end 12a, the water in the rice paddies enters the fluid flow control valve body 11 from the one end 12a of the cylindrical body 12, and flows into the container 5 through the opening 14a of the floating member 14.
Spills into the interior space. Then, the water that has flowed out into the internal space of the container 5 flows out to the drainage channel through the drainage hole 100.

Referring to FIG. 6, on the other hand, when the water level of the drainage channel is higher than the water level of the rice field, the water level in the container 5 communicating with the drainage channel also becomes higher than the water level of the rice field. However, in this case, since the floating member 14 is configured to float on water,
Water in the container 5 is prevented from entering the opening 14a of the floating member 14. For this reason, when the water level of the drainage channel is higher than the water level of the rice field, the backflow of water from the drainage channel side to the rice field side is automatically prevented.

Referring to FIG. 7, when the water level in the drainage channel becomes extremely high, the entire space in container 5 is filled with water. In this case, since the water pressure in the container 5 becomes extremely high, the water pressure causes the flexible bag-shaped member 1 to move.
As shown in FIG. 3, the water path is automatically cut off. Therefore, even if the water filled in the container 5 enters the opening 14 a of the floating member 14, the erosion of the flexible bag-like member 13 hinders the progress of the water, and the water flows backward to the rice field. Is prevented.

As described above, when the fluid flow control valve element 11 of the present embodiment is used, similarly to the reference example , when the water level of the drainage channel is higher than the water level of the rice field, the drainage channel side to the rice field side is used. Backflow of water is automatically prevented. Therefore, even when the water level in the drainage channel rises due to a lot of rain or the like, there is no need to monitor the water level in the drainage channel, and labor can be greatly reduced.

In the reference example and the embodiment , the case where the cylindrical portions 2 and 12 have a substantially L shape as shown in FIGS. 1 and 4 has been described. However, as shown in FIG. The part 12 may have a linear shape.

Also, the one end portions 2a and 12a of the cylindrical bodies 2 and 12 shown in FIGS. 1 and 2 and the opening 14a of the floating member 14 shown in FIG.
Alternatively, a filter 1 having pores as shown in FIG.
6 may be provided. Thus, filter 15,
The provision of 16 makes it possible to prevent foreign substances such as small animals and dust from entering the fluid flow control valve elements 1 and 11, and to remove foreign substances.

In FIGS. 2 and 5, etc., the cylinders 2, 12
Although the one ends 2a and 12a face upward, they may face downward. Also, one end 2 of the cylindrical bodies 2 and 12
The cylinders 2 and 12 may be rotatably attached to the container 5 so that the a and 12a are directed upward or downward.

The fluid is not limited to water, and the fluid flow control valve element 11 of the present invention is not limited to the one installed in a rice field, but may be any application requiring control of fluid flow. It can also be applied to

The embodiments disclosed this time are to be considered in all respects as illustrative and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

[0039]

According to the flow fluid flow control valve element of the present invention, although the fluid flows from one end of the fluid flow control valve element to the other end is allowed, backflow from the other end on the other hand to the end Is automatically prevented. Accordingly, if the fluid flow control valve element is provided between the rice field and the drainage channel, it is not necessary to monitor the amount of fluid in the drainage channel, and labor can be significantly reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view schematically showing a configuration of a fluid flow control valve element according to a reference example .

FIG. 2 is a first diagram showing an operation of a fluid flow control valve element in a reference example .

FIG. 3 is a second diagram showing the operation of the fluid flow control valve element in the reference example .

4 is a perspective view schematically showing the structure of a fluid flow control valve element which definitive to form state of an embodiment of the present invention.

5 is a first diagram showing an operation of a fluid flow control valve element which definitive to form state of an embodiment of the present invention.

6 is a second diagram showing an operation of a fluid flow control valve element which definitive to form state of an embodiment of the present invention.

7 is a third diagram showing the operation of a fluid flow control valve element which definitive to form state of an embodiment of the present invention.

FIG. 8 is a perspective view schematically showing a configuration of a fluid flow control valve body in a case where a cylindrical body has a linear shape.

FIG. 9 is a view showing a configuration in a case where a mesh filter is provided at an end opening of a fluid flow control valve element.

FIG. 10 is a diagram showing a configuration in a case where a filter composed of fine holes is provided at an end opening of a fluid flow control valve element.

FIG. 11 is a schematic perspective view showing water level adjustment of a rice field using a conventional weir plate.

FIG. 12 is a diagram for explaining adjusting a water level of a rice field by a weir plate.

FIG. 13 is a diagram for explaining that water flows backward from a drainage channel to a rice field.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1, 11 Fluid flow control valve body 2, 12 Cylindrical body 3 Lid 13 Flexible bag-like member 14 Floating member

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Claims (5)

(57) [Claims] 1. A fluid flow control valve body for controlling a flow of a fluid, comprising: a tubular body having openings at both ends and capable of passing a fluid between one end and the other end; A flexible bag-shaped member having an opening and allowing fluid to flow between one end and the other end , such that the internal space of the cylindrical body and the flexible bag-shaped member communicates with each other, The other end of the cylindrical body and the other end of the flexible bag-shaped member are joined, and further have a through hole, and the through hole is provided in the internal space of the flexible bag-shaped member. A floating member, which is attached to the one end of the flexible bag-shaped member so as to communicate with the floating member and is made of a material that floats on a fluid. Wherein further comprising a container having a hole communicating from the inside to the outside for fluid flow, before Symbol浮部material located inside the vessel, and so that the one end of the cylinder is positioned on the outside of the container 2. The fluid flow control valve element according to claim 1, wherein the cylinder is supported by the container. 3. The valve body for fluid flow control according to claim 1, further comprising a filter for removing foreign substances at at least one of the one end of the cylindrical body and the through hole of the floating member. 4. The fluid flow control valve element according to claim 1, wherein the cylinder has an L-shape. 5. The fluid flow control valve according to claim 4 , wherein the cylinder is rotatably supported by the container.