JP3958547B2 - Pump equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a pump facility suitable for use in emergency drainage or the like.
[0002]
[Prior art]
Conventionally, for example, when the water level of a river or an irrigation channel rises due to heavy rain and a danger of flooding occurs or when flooding actually occurs, drainage must be performed urgently. The drainage work is carried out by transporting a submersible pump equipped with a float to the vicinity of the river or irrigation channel to be drained by a truck or the like.
[0003]
FIG. 14 is a view showing an example of a method for feeding the submersible pump 80 provided with the float 81 into the river etc. 90 by the crane truck 85. As shown in the figure, when the submersible pump 80 to which the float 81 is attached has a weight that cannot be transported by manpower, the submersible pump 80 is lifted by the crane 83 and put into a desired flooded place such as a river 90. In particular, when the river 90 or the like is shallow, in order to secure the necessary water depth of the submersible pump 80, it is necessary to put the submersible pump 80 in the distance, and a large crane 83 is required accordingly.
[0004]
On the other hand, when the submersible pump 80 to which the float 81 is attached has a weight that can be transported manually, it is transported to a point where the necessary water depth in the river 90 can be secured by human power. In particular, when the river etc. 90 is shallow, it is transported to the vicinity of the center of the river etc. 90 in order to secure the necessary water depth of the submersible pump 80.
[0005]
The pump suction port 87 of this type of submersible pump 80 is in the vicinity of the impeller and is integrated with the submersible pump 80.
[0006]
However, the conventional pump equipment has the following problems.
{Circle around (1)} When the submersible pump 80 is manually transported, the shallow river 90 or the like 90 is transported to the vicinity of the center of the river where the water depth is deep, and is therefore dangerous.
[0007]
(2) When the submersible pump 80 is transported by the crane 83, the shallow river etc. 90 is lifted up to near the center of the river where the water depth is deep as described above, so it is necessary to prepare a large crane car corresponding to this. .
[0008]
(3) When the pump input position is limited by the suspension load capacity of the crane vehicle, it becomes difficult to drain to a depth that requires drainage.
[0009]
(4) It is necessary to drain to a lower water level, and when the submersible pump 80 does not suck in sediments such as sand and pebbles accumulated at the bottom of the drainage site, the submerged depth of the submersible pump 80 However, if you do so, air suction vortices will be generated on the water surface, making it easier to inhale air, possibly causing vibration and noise. There is.
[0010]
[Problems to be solved by the invention]
The present invention has been made in view of the above points, and its purpose is to easily perform surface water intake at a location far from the shore or at a deeper position (for example, the center of a river) and easily from a high water level to a low water level. It is to provide a pump facility that enables safe drainage.
[0011]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the pump equipment according to the present invention is connected to a suction side of a submersible pump which is transportable and submerged in water, and has a buoyancy floated by being put on the liquid surface. A pump suction port provided in the structure is connected to the flexible suction pipe , and the buoyancy structure further includes a vortex prevention portion that covers an upper portion of the pump suction port that opens in the liquid .
[0012]
Further, the present invention is characterized in that a suction pipe having a pump suction port is attached to the buoyancy structure, and the flexible suction pipe is connected to the suction pipe.
Further, the present invention is characterized in that the buoyancy structure is provided with the vortex preventing portion that protrudes outward by having a T-shaped longitudinal section or an inverted T-shaped longitudinal section.
Further, the present invention is characterized in that the suction pipe is suspended from the buoyancy structure by a suspension means.
[0013]
Further, the present invention is characterized in that the buoyancy structure itself is formed in a shape having a pump suction port.
[0014]
Further, the present invention is characterized in that the buoyancy structure is configured such that an opening itself provided on a lower surface thereof serves as a pump suction port, and the vortex preventing portion projects outwardly.
Further, the present invention is characterized in that the buoyancy structure is provided with the pump suction port sideways, and the vortex prevention portion is formed so as to cover a suction side front upper portion of the pump suction port.
[0015]
According to the present invention, the vortex prevention portion is provided with a hole that vertically penetrates the air suction vortex that circulates from the outer periphery of the vortex prevention portion and prevents the air suction vortex from being sucked into the pump suction port. Features.
[0016]
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 diagram showing an embodiment of a pump facility according to the present invention. The pump facility shown in the figure has a flexible suction pipe 20 connected to the suction side of the submersible pump 10 and the flexible suction pipe provided in a pump suction port 41 provided in a buoyancy structure 30 that floats on the water surface. 20, while a drainage hose 50 is connected to the discharge side of the submersible pump 10.
[0017]
That is, in this pump facility, the submersible pump 10 and the pump suction port 41 are separated, and the suction pipe 20 that connects the submersible pump 10 and the pump suction port 41 is a flexible suction pipe 20 that combines a hose and a flexible pipe. By attaching the suction port 41 to the buoyancy structure 30, only the buoyancy structure 30 and the pump suction port 41 are floated on the liquid level of the river etc. 60 by the crane 83 of the crane vehicle 84. Therefore, it is not necessary to attach a buoyancy structure to the submersible pump 10 itself, so that it is immersed in the water.
[0018]
Further, the drainage hose 50 attached to the discharge side of the submersible pump 10 is extended to a desired drainage place (for example, another river 65).
[0019]
When the submersible pump 10 is driven, the water in the river 60 and the like increased from the pump suction port 41 is sucked and drained to a desired drainage place by the drainage hose 50.
[0020]
According to this embodiment, it is not necessary to carry and install the heavy submersible pump 10 to the water position, and the water intake position of the pump suction port 41 can be freely selected only by carrying the light buoyancy structure 30. For this reason, surface water intake can be easily performed at a location far from the shore or at a deeper position (for example, in the middle of a river), and can be easily drained from a high water level to a low water level. Even if the submersible pump 10 is heavy or the river etc. 60 is shallow and needs to lift the pump suction port 41 far away, it is not necessary to use the large crane 83. Further, when the portion of the pump suction port 41 is transported by human power without using the crane 83, the transportation becomes easy.
[0021]
FIG. 2 is a diagram showing a reference example of pump equipment . In the pump facility shown in the figure, the same or corresponding parts as those of the pump facility according to the above-described embodiment are denoted by the same reference numerals, and detailed description thereof is omitted. The pump facility according to this reference example is different from the pump facility only in that a land pump 10 ′ is used instead of the submersible pump 10. In this reference example , the pump 10 'is mounted on the vehicle 17 to facilitate movement.
[0022]
3 to 13 are enlarged schematic cross-sectional views showing the main part of the pump suction port 41 to which the buoyancy structure 30 is attached. First, as shown in FIG. 3, a suction pipe 40 having a pump suction port 41 is attached to the lower part of a buoyancy structure 30-1 having a T-shaped longitudinal section, and the suction pipe 40 is bent while directing the pump suction port 41 downward. By doing so, the buoyancy structure 30-1 protrudes to the outside from the side, and the end thereof is connected to the flexible suction pipe 20.
[0023]
Here, the buoyancy structure 30-1 covers the upper part of the pump suction port 41 at the upper part, and is a circular vortex prevention part that projects at least to a diameter 2D that is concentric with the suction port diameter D of the pump suction port 41. 31 is provided. The buoyancy structure 30-1 only needs to have a structure having a specific gravity smaller than that of the liquid into which the buoyancy structure 30-1 is charged. For example, any material / structure other than a hollow tube or foamed resin may be used. (The same applies to the following embodiments). Moreover, the water depth of the pump suction inlet 41 is comprised so that it may become 0.7D or more.
[0024]
According to the experiment, when the water suction flow rate at the pump suction port 41 is 1.6 m / s, the water depth of the pump suction port 41 is 0 if the diameter of the vortex preventing portion 31 is 2D with respect to the suction port diameter D. It was confirmed that the suction vortex generated on the water surface was not sucked into the pump suction port 41 even at 7D. Therefore, the above conditions can be applied if the water suction flow rate at the pump suction port 41 is 1.6 m / s or less. If the diameter of the vortex preventing portion 31 is set to 2D or more, the air suction vortex is not sucked into the pump suction port 41 even at a higher suction flow velocity or shallow water depth. Further, if the water depth of the pump suction port 41 is set to 0.7D or more, the air suction vortex is not sucked into the pump suction port 41 even by the vortex prevention portion 31 having a higher suction flow velocity or a diameter of 2D or less.
[0025]
In FIG. 4, a suction pipe 40 having a pump suction port 41 facing directly downward is attached to the center of a buoyancy structure 30-2 having a T-shaped longitudinal section and provided with a vortex prevention portion 31 at the upper portion. The tube 40 is configured to protrude from the upper surface of the buoyancy structure 30-2, bend, and connect the flexible suction tube 20 to the tip thereof. The dimensional relationship between the suction port diameter of the pump suction port 41 and the water depth and the diameter of the vortex prevention unit 31 is the same as in the above embodiment. Even if configured in this manner, the generation of suction vortices generated on the water surface can be reliably prevented by the vortex prevention unit 31.
[0026]
In FIG. 5, a suction pipe 40 having a pump suction port 41 is attached to the center of a buoyancy structure 30-3 having an inverted T-shaped longitudinal section and provided with a vortex prevention portion 31 at the lower portion. The upper part of the buoyancy structure 30-3 is bent and protrudes to the outside, and the tip is connected to the flexible suction pipe 20. The dimensional relationship between the suction port diameter of the pump suction port 41 and the water depth and the diameter of the vortex prevention unit 31 is the same as in the above embodiment. In the case of this embodiment, a hole 33 penetrating vertically is provided in the vortex preventing portion 31. This hole 33 penetrates the air suction vortex which is going to be sucked into the pump suction port 41 so as to go around from the outer periphery of the vortex prevention part 31 as shown by the arrow a through the hole 33 as shown by the arrow b. The incoming water flow is disturbed, thereby preventing the air suction vortex from being sucked into the pump suction port 41. If comprised in this way, the suction | inhalation to the pump suction inlet 41 of the air suction vortex produced on the water surface can be prevented more reliably.
[0027]
6 also has a suction pipe 40 having a pump suction port 41 attached to the center of a buoyancy structure 30-4 having a reverse T-shaped longitudinal section and provided with a vortex prevention portion 31 at the lower portion. Is protruded from the upper surface of the buoyancy structure 30-4 and then bent, and its tip is connected to the flexible suction pipe 20. The dimensional relationship between the suction port diameter of the pump suction port 41 and the water depth and the diameter of the vortex prevention unit 31 is the same as in the above embodiment. Also in this embodiment, a hole 33 is provided in the vortex preventing portion 31 to more effectively prevent the air suction vortex from being sucked into the pump suction port 41.
[0028]
FIG. 7 shows a buoyancy structure 30-5 having a cup-faced shape and a shape in which a vortex-preventing portion 31 is projected outward from the outer periphery of the lower surface, and flexible suction is provided on the side surface. The tube 20 is connected. In the case of this embodiment, the opening itself provided on the lower surface of the buoyancy structure 30-5 is used as the pump suction port 41. The dimensional relationship between the suction port diameter of the pump suction port 41 and the water depth and the diameter of the vortex prevention unit 31 is the same as in the above embodiment. Also in this embodiment, a hole 33 is provided in the vortex preventing portion 31 to more effectively prevent the air suction vortex from being sucked into the pump suction port 41.
[0029]
8 is the same as that shown in FIG. 7 in that the buoyancy structure 30-6 itself is provided with a pump suction port 41 and a flexible suction pipe 20 is connected to its side surface. In the case of this embodiment, the pump suction port 41 is formed in the center of the lower surface of the buoyancy structure 30-6 so as to face the horizontal direction, and the vortex prevention portion 31 provided in the buoyancy structure 30-6 is provided on the pump suction port 41. A semicircular arc having a radius of 1D is formed so as to cover the upper front side of the suction side. According to the experiment, even if the pump suction port 41 is installed sideways in this manner, the water depth to the central axis of the pump suction port 41 can be increased by providing the semicircular vortex preventing portion 31 having a radius of 1D or more on the upper part. If it was 1D or more, there was no fear that the air suction vortex was sucked into the pump suction port 41 when the water suction flow rate at the pump suction port 41 was 1.6 m / s. Of course, the above conditions can be applied if the suction flow rate of water at the pump suction port 41 is 1.6 m / s or less. Further, if the diameter of the vortex preventing portion 31 is set to 1D or more, the air suction vortex is not sucked into the pump suction port 41 even at a higher suction flow velocity or shallow water depth. Further, if the water depth of the pump suction port 41 is set to 1.0 D or more, the air suction vortex is not sucked into the pump suction port 41 even in the vortex prevention portion 31 having a higher suction flow velocity or a diameter of 1 D or less.
[0030]
In the structure shown in FIG. 9, the suction pipe 40 is fixed to the center of a plate-like (disc-like) buoyancy structure 30-7 so that the pump suction port 41 faces directly below, and the buoyancy structure 30 of the suction pipe 40 is shown. A portion protruding from the top of −7 is bent so as to face in the lateral direction, and an end thereof is connected to the flexible suction pipe 20. Also in this embodiment, the dimensional relationship between the suction port diameter and water depth of the pump suction port 41 and the diameter of the vortex preventing portion 31 is the same as that of the embodiment shown in FIG. 3 and FIG. In the case of this embodiment, the entire buoyancy structure 30-7 becomes the vortex prevention unit 31.
[0031]
10 shows that the suction pipe 40 is fixed to the flat buoyancy structure 30-8 so that the pump suction port 41 faces slightly obliquely forward from the vertically downward direction, and the buoyancy structure of the suction pipe 40 is shown. A portion protruding from the upper part of 30-8 is bent so as to face in the lateral direction, and the flexible suction pipe 20 is connected to the end thereof. Also in this case, the entire buoyancy structure 30-8 constitutes the vortex prevention unit 31. Even if the pump suction port 41 is installed obliquely downward as in this embodiment, the shape of the vortex preventing portion 31 that is installed at the top and covers this is twice the diameter of the suction port diameter D of the pump suction port 41. If the water depth to the central axis of the pump suction port 41 is 1D or more if the circular shape is 2D, then the air suction vortex is the pump suction port when the water suction flow rate at the pump suction port 41 is 1.6 m / s. It was confirmed by experiment that there is no fear of being sucked into 41. Of course, the above conditions can be applied if the suction flow rate of water at the pump suction port 41 is 1.6 m / s or less. Further, if the diameter of the vortex preventing portion 31 is increased, the air suction vortex is not sucked into the pump suction port 41 even at a higher suction flow velocity or shallower water depth. Further, if the water depth of the pump suction port 41 is set to 1D or more, the air suction vortex is not sucked into the pump suction port 41 even in the vortex prevention unit 31 having a faster suction flow velocity and a small outer shape.
[0032]
Next, in the embodiments shown in FIGS. 11, 12, and 13, the suction pipe 40 is suspended below the flat buoyancy structures 30-9, 10, and 11 by the suspension means 37. As the suspending means 37, various things such as a rope, a wire, and a chain can be considered. Here, in the embodiment shown in FIG. 11, the pump suction port 41 is directed downward, and in the embodiments shown in FIGS. 12 and 13, the pump suction port 41 is directed obliquely downward. In the case of the embodiment shown in FIG. 11, the buoyancy structure 30-9 is circular, and the dimensional relationship between the suction inlet diameter of the pump inlet 41, the water depth, and the diameter of the vortex prevention unit 31 is the same as in FIGS. By making the suction flow rate of water into the pump suction port 41 1.6 m / s or less, the air suction vortex is prevented from being sucked into the pump suction port 41. In the case of the embodiment shown in FIGS. 12 and 13, buoyancy structures 30-10, 11 having the same shape as the buoyancy structure 30-8 shown in FIG. The air suction vortex generated on the water surface is sucked into the pump suction port 41 by setting the dimensional relationship between the diameter, the water depth, and the vortex prevention portion 31 and the water suction flow rate to the pump suction port 41 to 1.6 m / s or less. It is preventing.
[0033]
In each of the above embodiments, the side of the buoyancy structures 30-1 to 11 to which the flexible suction pipe 20 is connected is subjected to the weight of the flexible suction pipe 20 and the water passing therethrough, and the buoyancy structure. Since the bodies 30-1 to 11-11 are inclined and tend to suck vortices, for example, the thickness and outer dimensions of the portion of the buoyancy structures 30-1 to 11 to which the flexible suction pipe 20 is connected are increased. Alternatively, it is preferable to prevent the buoyancy structures 30-1 to 11 from being tilted by providing a tilt prevention means such as attaching an element that generates buoyancy separately.
[0034]
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, structure, 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 exhibited. For example, the shape of the buoyancy structure is not limited to a vertical cross-sectional T shape or a flat plate shape, and various modifications are possible. Moreover, although the pump inlet 41 showed the example which has faced the downward direction, the diagonally downward direction, or the horizontal direction in the said embodiment, you may face any other directions, such as an upward direction.
[0035]
In the above embodiment, the vortex prevention device is configured to include a vortex prevention portion that covers the upper part of the pump suction port. However, any other means can be used as long as it prevents the air suction vortex from being sucked into the pump suction port from the water surface. The vortex prevention device having any structure may be used.
[0036]
【The invention's effect】
As described in detail above, the present invention has the following excellent effects. (1) There is no need to transport and install a heavy submersible pump to the water position, and the water intake position of the pump suction port can be freely selected simply by transporting a light buoyancy structure. Surface water intake at a deep water depth (for example, the center of a river) can be easily performed, and safe drainage can be easily performed from a high water level to a low water level.
[0037]
(2) In addition, even if the submersible pump is heavy or the river to be taken in is shallow, it is necessary to lift the pump suction port far away, the buoyancy structure with the pump suction port attached to the submersible pump Because it is much lighter than when installed, it is not necessary to use a large crane, and it is much safer to transport the pump suction port to the water position by hand without using a crane. It becomes easy, the mobility can be improved and the labor can be reduced, and the installation tool can be simplified.
[0038]
(3) Since the vortex preventing device is provided in the buoyancy structure, it becomes possible to drain to a lower water level. In the case of the present invention, since it is a structure that simply attaches the pump suction port to a light buoyancy structure, the pump suction port can be easily installed at a shallow depth near the water surface, and thus it is significant to provide a vortex prevention device.
[Brief description of the drawings]
FIG. 1 is a diagram showing an embodiment of a pump facility according to the present invention.
FIG. 2 is a diagram showing a reference example of pump equipment .
FIG. 3 is an enlarged schematic cross-sectional view showing a main part of a pump suction port 41 to which a buoyancy structure 30-1 is attached.
4 is an enlarged schematic cross-sectional view of a main part showing a portion of a pump suction port 41 to which a buoyancy structure 30-2 is attached. FIG.
FIG. 5 is an enlarged schematic cross-sectional view showing a main part of a pump suction port 41 to which a buoyancy structure 30-3 is attached.
FIG. 6 is an enlarged schematic cross-sectional view showing a main part of a pump suction port 41 to which a buoyancy structure 30-4 is attached.
FIG. 7 is an enlarged schematic cross-sectional view showing a main part of a pump suction port 41 to which a buoyancy structure 30-5 is attached.
8A and 8B are diagrams showing a portion of a pump suction port 41 to which a buoyancy structure 30-6 is attached, FIG. 8A is an enlarged schematic cross-sectional view of a main part, and FIG. 8B is a plan view.
FIG. 9 is an enlarged schematic cross-sectional view of a main part showing a portion of a pump suction port 41 to which a buoyancy structure 30-7 is attached.
10A and 10B are diagrams showing a portion of the pump suction port 41 to which the buoyancy structure 30-8 is attached, FIG. 10A is an enlarged schematic cross-sectional view of the main part, and FIG. 10B is a plan view.
FIG. 11 is an enlarged schematic cross-sectional view showing a main part of a pump suction port 41 to which a buoyancy structure 30-9 is attached.
12 is an enlarged schematic cross-sectional view of a main part showing a portion of a pump suction port 41 to which a buoyancy structure 30-10 is attached. FIG.
13 is an enlarged schematic cross-sectional view of a main part showing a portion of a pump suction port 41 to which a buoyancy structure 30-11 is attached. FIG.
FIG. 14 is a diagram showing an example of conventional pump equipment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Submersible pump 10 'Land pump 17 Vehicle 20 Flexible suction pipe 30 (30-1 to 11) Buoyancy structure 31 Swirl prevention part (vortex prevention device)
33 Hole 37 Suspension means 40 Suction pipe 41 Pump suction port 50 Drain hose 60 River etc. 65 Other river etc. 83 Crane 84 Crane vehicle

Claims (8)

A flexible suction pipe is connected to the suction side of a submersible pump that can be transported and immersed in water, and the pump suction port provided in the buoyancy structure floating on the liquid surface is provided with the flexible suction pipe. Further, the buoyancy structure includes a vortex prevention portion that covers an upper portion of the pump suction port that opens in the liquid .   2. The pump equipment according to claim 1, wherein a suction pipe having a pump suction port is attached to the buoyancy structure, and the flexible suction pipe is connected to the suction pipe. 3. The pump equipment according to claim 2, wherein the buoyancy structure is provided with the vortex preventing portion projecting outward by having a longitudinal section T shape or a longitudinal section inverted T shape. The pump equipment according to claim 2, wherein the suction pipe is suspended from the buoyancy structure by a suspension means.   2. The pump equipment according to claim 1, wherein the buoyancy structure itself is formed in a shape having a pump suction port. 6. The pump equipment according to claim 5, wherein the buoyancy structure is configured such that an opening provided on a lower surface thereof serves as a pump suction port, and the vortex preventing portion projects outwardly. . 6. The pump equipment according to claim 5, wherein the buoyancy structure is provided with the pump suction port in a lateral direction, and the vortex prevention portion is formed so as to cover a suction side front upper portion of the pump suction port. The vortex prevention part is provided with a hole that disturbs an air suction vortex penetrating up and down from the outer periphery of the vortex prevention part to prevent the air suction vortex from being sucked into a pump suction port. Pump equipment according to 1 or 2 or 5.

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