JP3795302B2 - Flap valve - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a flap valve that prevents backflow from a discharge pipe end of a drainage pump.
[0002]
[Prior art]
Conventionally, for example, in a drainage station or a pumping station in a river, a pump facility is installed to pump water and drain it to another place. FIG. 9 is an overall schematic view showing this type of pump equipment. As shown in the figure, in this pump facility, a discharge pipe 69 is connected to the downstream side of the drainage pump 60 via a valve 67, and the tip of the discharge pipe 69 is inserted into a discharge tank 78. In order to prevent back flow when the pump is stopped, a flap valve 80 is attached.
[0003]
When the drainage pump 60 is operated, the water in the suction water tank 71 is introduced into the discharge pipe 69 via the drainage pump 60, opens the flap valve 80, and is discharged into the discharge tank 78.
[0004]
FIG. 10 is an enlarged front view of the flap valve 80 viewed from the right side shown in FIG. As shown in the figure, when the discharge pipe 69 is large, a plurality (four in this conventional example) of valve bodies 81 are attached, and each valve body 81 has four discharge pipe ends 84 provided on the valve body 83. It is attached and configured to close. That is, each valve body 81 is supported by the valve shafts 85, 85 at the upper side thereof, and is attached so as to be rotatable about the valve shafts 85, 85. The discharge pipe end 84 is closed by its own weight. Has been. When water flows through the discharge pipe 69, the valve body 81 is pushed and opens as shown by a dotted line in FIG. 9, and water is discharged from the discharge pipe ends 84 into the tank 78.
[0005]
However, since all of the conventional valve bodies 81 have the same structure (shape, area, weight, mounting angle), when the pump operation is stopped, all the valve bodies 81 are closed at the same time. The impact load acting on the body 83 and the housing (the wall portion constituting the discharge tank 78) is very large. As a result, it is necessary to make the valve body 83 and the casing sturdy, so that the flap valve is expensive, the construction work cost is increased, and the impact sound when the valve body 81 is closed is very large.
[0006]
[Problems to be solved by the invention]
The present invention has been made in view of the above points, and its purpose is to reduce the impact load when the valve body is closed, and it is not necessary to increase the strength of the valve body and the housing to which the flap valve is attached. Another object of the present invention is to provide a flap valve that can reduce the impact sound when the valve body is closed.
[0007]
[Means for Solving the Problems]
In order to solve the above problems, the present invention is attached to a discharge pipe end of a drainage pump, is rotatable around a valve shaft, and closes the discharge pipe end by its own weight to prevent backflow from the discharge pipe end. In the flap valve having a plurality of valve bodies having a structure, the plurality of valve bodies are installed in a vertical direction, and the upper valve body and the lower valve body have the same width dimension and are high in height. It is characterized in that it is formed into a shape having different dimensions, and thereby the closing timing of the plurality of valve bodies installed in the longitudinal direction is made different . As a result, not all the valve bodies are closed at the same time, so the impact load when the valve bodies are closed can be reduced.
Further, the present invention provides a plurality of valve bodies that are attached to the discharge pipe end of the drainage pump, are rotatable about the valve shaft, and close the discharge pipe end by its own weight to prevent backflow from the discharge pipe end. The plurality of valve bodies are installed in the vertical direction, and the upper valve body and the lower valve body have the same height dimension but different width dimensions. Thus, the closing timings of the plurality of valve bodies installed in the vertical direction are made different.
[0008]
Further, the present invention provides a plurality of valve bodies that are attached to the discharge pipe end of the drainage pump, are rotatable about the valve shaft, and close the discharge pipe end by its own weight to prevent backflow from the discharge pipe end. The plurality of valve bodies are installed in the vertical direction, and the upper valve body and the lower valve body have the same width dimension and height dimension but different thicknesses. It is formed in a shape, whereby the closing timing of the plurality of valve bodies installed in the vertical direction is made different.
[0009]
Further, the present invention provides a plurality of valve bodies that are attached to the discharge pipe end of the drainage pump, are rotatable about the valve shaft, and close the discharge pipe end by its own weight to prevent backflow from the discharge pipe end. The plurality of valve bodies are installed in the longitudinal direction, and the upper valve body and the lower valve body are attached to the discharge pipe end at different attachment angles, thereby The closing timings of the plurality of valve bodies installed in the vertical direction are different.
Further, the present invention provides a plurality of valve bodies that are attached to the discharge pipe end of the drainage pump, are rotatable about the valve shaft, and close the discharge pipe end by its own weight to prevent backflow from the discharge pipe end. In the flap valve, the position of the center of gravity is made different for each valve body or for each predetermined number of valve bodies, whereby the closing timings of the plurality of valve bodies are made different.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a schematic side view of an essential part showing an embodiment in which a flap valve 1 to which the present invention is applied is attached to a distal end of a discharge pipe 69 of a pump facility. FIG. 2 is a front view of the flap valve 1 viewed from the right side shown in FIG. Since the structure of the entire pump equipment other than the structure of the flap valve 1 is the same as that of the pump equipment shown in FIG. 9, the description thereof is omitted.
[0011]
As shown in FIGS. 1 and 2, nine discharge tube ends 11-1, 11-2, and 11-3 are provided at the distal end of the discharge tube 69 in the horizontal direction and three types in the vertical direction. A valve body 13 is attached, and valve bodies 15-1, 15-2, and 15-3 are attached to the discharge pipe ends 11-1, 11-2, and 11-3 so as to block the discharge pipe ends. . And each valve body 15-1,15-2,15-3 is attached so that the upper side is supported by the valve shafts 17 and 17 so that rotation is possible centering on the valve shafts 17 and 17, and by own weight The discharge pipe ends 11-1, 11-2, 11-3 are configured to be closed.
[0012]
Here, the valve body 15-1 and the discharge pipe end 11-1 in the uppermost row have the same width as the valve body 15-2 and the discharge pipe end 11-2 in the lower row, but the height dimension is short. It is configured. Similarly, the valve body 15-3 and the discharge pipe end 11-3 have the same width as the valve bodies 15-2 and the discharge pipe end 11-2 in the upper row, but the height dimension is long. That is, each of the three valve bodies 15-1, 15-2, and 15-3 is different in size and weight.
[0013]
When water flows through the discharge pipe 69, the valve bodies 15-1, 15-2, 15-3 are pushed and opened as indicated by dotted lines in FIG. 1, and the discharge pipe ends 11-1, 11 are opened. Water is discharged into the discharge tank 78 from −2, 11-3.
[0014]
On the other hand, when the operation of the pump is stopped, the three sets of valve bodies 15-1, 15-2, and 15-3 are different in size and weight and are therefore closed at different timings. Which valve body 15-1, 15-2, 15-3 is closed first depends on the weight, center of gravity, etc. of each valve body 15-1, 15-2, 15-3, but is closed anyway. The size, weight, center of gravity, etc. are designed so that the timing is different.
[0015]
Since the valve bodies 15-1, 15-2, and 15-3 are closed at different closing timings as described above, the impact load acting on the valve body 13 and the casing (the wall portion constituting the discharge tank 78) can be reduced. As a result, it is not necessary to keep the valve body 13 and the housing so strong, the price of the flap valve 1 and the cost of civil engineering work can be reduced, and the valve bodies 15-1, 15-2 and 15-3 are closed. The impact sound of can be considerably reduced.
[0016]
In the above embodiment, the size and weight of the valve bodies 15-1, 15-2, and 15-3 are changed by changing the height of the valve bodies 15-1, 15-2, and 15-3. However, as shown in FIG. By changing the width dimension without changing the height dimension of 2,15-3, even if the size / weight is changed, the same operation / effect as described above can be obtained.
[0017]
In the above embodiment, the valve body closing timing is made different by changing the size (weight) of the valve body, but the valve body closing timing is made different by other methods as described below. Also good.
[0018]
FIG. 4 is a schematic side view of the main part showing a state in which the flap valve 1 according to another embodiment of the present invention is attached to the tip of the discharge pipe 69 of the pump equipment. A view of the flap valve 1 viewed from the right side is the same as FIG.
[0019]
In this embodiment, the lower valve body 15-5 and the upper valve body 15-4 are formed in the same plane size. However, the valve body 15-5 is heavier than the valve body 15-4 by increasing its thickness.
[0020]
Then, when the operation of the pump is stopped after the water flows through the discharge pipe 69 and the valve bodies 15-4 and 15-5 are opened as indicated by dotted lines in FIG. 4, the valve bodies 15-4 and 15-5 are stopped. Is closed at different closing timings due to the difference in weight.
[0021]
Therefore, as in the above embodiment, the impact load acting on the valve body and the housing can be reduced, and as a result, it is not necessary to make the valve body and the housing so strong, and the price of the flap valve and the civil engineering work cost can be reduced. Or, the impact sound when the valve bodies 15-4 and 15-5 are closed can be considerably reduced.
[0022]
FIG. 5 is a schematic side view of the main part showing a state in which the flap valve 1 according to another embodiment of the present invention is attached to the tip of the discharge pipe 69 of the pump equipment, and FIG. 6 is a front view of the flap valve 1 viewed from the right side. It is.
[0023]
As shown in both figures, the valve bodies 15-6, 15-7, and 15-8 are all formed to the same size. On the other hand, the valve body 13 attached to the tip of the discharge pipe 69 has two fold lines a and b directed horizontally so that the attachment angles of the valve bodies 15-6, 15-7 and 15-8 are different. Folded on three sides.
[0024]
If comprised in this way, since the attachment angle to the discharge pipe end of each valve body 15-6, 15-7, 15-8 differs, water flows through the discharge pipe 69, and each valve body 15-6, 15 -7 and 15-8 are different in opening when they are opened as indicated by dotted lines in FIG. 5, and therefore when the operation of the pump is stopped thereafter, each valve body 15-6, 15-7, 15- 8 closing timings are different. Therefore, the impact load acting on the valve body and the housing can be reduced as in the above embodiments.
[0025]
FIG. 7 is a schematic side view of the main part showing a state in which the flap valve 1 according to another embodiment of the present invention is attached to the tip of the discharge pipe 69 of the pump equipment. The flap valves 1 are arranged in three rows in the horizontal direction in the same manner as in FIG.
[0026]
In this embodiment, the difference from the embodiment shown in FIGS. 5 and 6 is that the mounting angle is made different so that the lower valve body 15-11 is more laid down than the upper valve body 15-9. Is a point. Even with this configuration, the closing timings of the valve bodies 15-9, 15-10, and 15-11 can be made different as in the embodiment shown in FIG. Can be small.
[0027]
FIG. 8 is a main part schematic side view showing a state in which the flap valve 1 according to the reference example is attached to the tip of the discharge pipe 69 of the pump equipment. In addition, these flap valves 1 are all installed in the same shape and structure with a total of nine in three rows.
[0028]
In the case of this reference example , each flap valve 1 is provided with a stopper 19 in the vicinity of the valve shaft 17 so as not to open the opening of the valve body 15-12 beyond a predetermined opening.
[0029]
With this construction, when water flows through the discharge pipe 69 and each valve body 15-12 is opened, each valve body 15-12 comes into contact with the stopper 19, which is more than shown by a dotted line in FIG. The opening is limited without opening. For this reason, when the operation of the pump is stopped thereafter, the valve bodies 15-12 are simultaneously closed, but the impact load is small as a whole. As a result, it is not necessary to keep the valve body and the housing so strong. Not only can the price of the flap valve and the cost of civil engineering work be reduced, but also the impact sound when the valve body 15-12 is closed can be considerably reduced.
[0030]
In addition, the angle of the stopper 19 as shown in FIG. 8 (opening limit angle) is made different for each valve body 15-12 or for each predetermined number of valve bodies 15-12, so that the valve body as in each of the above embodiments. The closing timing of 15-12 may be varied to further reduce the impact load of the entire valve body 15-12.
[0031]
Further, the center of gravity of each valve body or a predetermined number of valve bodies may be made different so that the closing timing of the flap valve is made different as in each of the above embodiments, and the impact load of the whole valve body may be reduced.
[0032]
Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the technical idea described in the claims and the specification and drawings. Is possible. Note that any shape or material not directly described in the specification and drawings is within the scope of the technical idea of the present invention as long as the effects and advantages of the present invention are achieved.
[0033]
For example, the arrangement, number, and shape of the valve bodies to be installed can be variously modified. As means for varying the closing timing of the valve body in the above described embodiment, the means for varying the size or weight or mounting angle or centroid of the valve body, each of these means is the structure of the above embodiment It is not limited and other various shapes and structures may be used.
[0034]
【The invention's effect】
As described above in detail, according to the present invention, since the closing timing of a predetermined number of valve bodies among the plurality of valve bodies is made different from the closing timing of other valve bodies, the impact load when the valve bodies close Therefore, it is not necessary to increase the strength of the chassis to which the valve body and the flap valve are attached so that the price of the flap valve and the cost of civil engineering work can be reduced, and the impact sound when closing the valve body is reduced. It has an excellent effect of being able to.
[Brief description of the drawings]
FIG. 1 is a schematic side view of a main part showing a state in which a flap valve 1 to which the present invention is applied is attached to a distal end of a discharge pipe 69 of a pump facility.
FIG. 2 is a front view showing a flap valve 1. FIG.
FIG. 3 is a front view showing a modified example of the valve bodies 15-1, 2, 3;
FIG. 4 is a schematic side view of an essential part showing a state in which a flap valve 1 according to another embodiment of the present invention is attached to the distal end of a discharge pipe 69 of pump equipment.
FIG. 5 is a schematic side view of an essential part showing a state in which a flap valve 1 according to another embodiment of the present invention is attached to the distal end of a discharge pipe 69 of pump equipment.
6 is a front view of the flap valve 1 shown in FIG. 5. FIG.
FIG. 7 is a schematic side view of an essential part showing a state in which a flap valve 1 according to another embodiment of the present invention is attached to a distal end of a discharge pipe 69 of a pump facility.
FIG. 8 is a schematic side view of an essential part showing a state in which a flap valve 1 according to a reference example is attached to a tip of a discharge pipe 69 of a pump facility.
FIG. 9 is an overall schematic view showing pump equipment.
10 is a front view showing a conventional flap valve 80. FIG.
[Explanation of symbols]
1 flap valve 11-1, 11-2, 11-3 discharge pipe end 13 valve body 15-1, 15-2, 15-3 valve body 17 valve shaft 15-4, 15-5 valve body 15-6, 15 -7, 15-8 Valve body 15-9, 15-10, 15-11 Valve body 15-12 Valve body 19 Stopper 69 Discharge pipe 78 Discharge tank

Claims (5)

A flap valve provided with a plurality of valve bodies attached to the discharge pipe end of the drainage pump and capable of rotating around the valve shaft and closing the discharge pipe end by its own weight to prevent backflow from the discharge pipe end In
The plurality of valve bodies are installed in a vertical direction,
In addition, the upper valve body and the lower valve body are formed in shapes having the same width dimension but different height dimensions, and thus the closing timing of the plurality of valve bodies installed in the longitudinal direction is different. flap valve, characterized in that it was. A flap valve provided with a plurality of valve bodies attached to the discharge pipe end of the drainage pump and capable of rotating around the valve shaft and closing the discharge pipe end by its own weight to prevent backflow from the discharge pipe end In
The plurality of valve bodies are installed in a vertical direction,
In addition, the upper valve body and the lower valve body are formed in shapes having the same height dimension but different width dimensions, and thus the closing timing of the plurality of valve bodies installed in the longitudinal direction is different. A flap valve characterized by A flap valve provided with a plurality of valve bodies attached to the discharge pipe end of the drainage pump and capable of rotating around the valve shaft and closing the discharge pipe end by its own weight to prevent backflow from the discharge pipe end In
The plurality of valve bodies are installed in a vertical direction,
In addition, the upper valve body and the lower valve body have the same width dimension and height dimension, but are formed in different thicknesses, so that the closing timing of the plurality of valve bodies installed in the vertical direction can be controlled. A flap valve characterized by being different. A flap valve provided with a plurality of valve bodies attached to the discharge pipe end of the drainage pump and capable of rotating around the valve shaft and closing the discharge pipe end by its own weight to prevent backflow from the discharge pipe end In
The plurality of valve bodies are installed in a vertical direction,
The upper valve body and the lower valve body are attached to the discharge pipe end at different attachment angles, whereby the closing timing of the plurality of valve bodies installed in the longitudinal direction is made different. Flap valve. A flap valve provided with a plurality of valve bodies attached to the discharge pipe end of the drainage pump and capable of rotating around the valve shaft and closing the discharge pipe end by its own weight to prevent backflow from the discharge pipe end In
A flap valve characterized in that the position of the center of gravity of each valve body or a predetermined number of valve bodies is made different so that the closing timings of the plurality of valve bodies are made different.

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