JP4491097B2 - Pump gate - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a pump gate including a pump that opens and closes a water channel and drains water on one side of the closed water channel.
[0002]
[Prior art]
Conventionally, for example, in a place where a tributary flows into the main river, a gate for opening and closing the tributary is installed on the tributary side. When the main river is flooded due to heavy rain or the like, the water in the main river is prevented from flowing back into the tributaries by closing the gate. On the other hand, the water that flows from the upstream of the tributary when the gate is closed is forcibly drained to the main river by the pump.
[0003]
Among these types of gates, there is a pump gate in which a drain pump is attached to the gate itself in order to save space. FIGS. 9A, 9B and 9C are diagrams showing this type of conventional pump gate. That is, the pump gate 80 shown in FIG. 9A has a structure in which a drainage pump 85 is attached to the upstream surface of the gate 81 to which a skin plate 83 that opens and closes the water channel is attached. The pump 85 is operated in a state where is closed, and the water accumulated on the upstream side is drained to the downstream side. However, the pump gate 80 is enlarged because the pump 85 and the gate 81 are separated.
[0004]
On the other hand, in the case of the pump gates 80-2 and 3 shown in FIGS. 9B and 9C, the pump 85 is incorporated in the gate 81 to which the skin plate 83 is attached, and is upstream from the water inlet 87 provided in the skin plate 83. Side water is sucked and drained from the flap valve 89 to the downstream side. These pump gates 80-2 and 3 can be made thinner than the pump gate 80 shown in FIG.
[0005]
However, in the pump gate 80-2 shown in FIG. 9B, the impeller 85a of the pump 85 and the drive unit 85b are both inside the gate 81, and the rotating surface of the impeller 85a is the gate 81 (skin plate 83). Therefore, the gate 81 cannot be further reduced in thickness.
[0006]
In the case of the pump gate 80-3 shown in FIG. 9C, since the pump 85 and the flap valve 89 are attached in series, the length of this portion becomes long, and further reduction in thickness cannot be achieved.
[0007]
Further, none of these pump gates 80, 80-2, 80-3 has a good weight balance.
[0008]
[Problems to be solved by the invention]
The present invention has been made in view of the above points, and an object of the present invention is to provide a pump gate that can be thinned and has a good weight balance.
[0009]
[Means for Solving the Problems]
In order to solve the above problems, a pump gate according to the present invention is a state in which a drain pump is incorporated in a gate that opens and closes a water channel, the pump is connected to a drive unit through a power transmission mechanism, and the water channel is closed by the gate. In the pump gate configured to drain the water on one side of the closed water channel by operating the pump with a driving machine, the gate is a box-shaped frame body whose downstream side is opened, A casing that forms a suction flow channel and a discharge flow channel extending upward from the suction flow channel is attached to the inside of the body, and the pump is a centrifugal pump so that the rotation shaft is substantially horizontal to the flow of the water channel. wherein is installed in the lower portion of the casing, the power transmission mechanism is a power transmission mechanism for transmitting power in a substantially perpendicular plane to the flow of the waterway is disposed on the downstream side of the centrifugal pump, the drive Machine is underwater electric motor, characterized in that it is placed next to the casing by attachment toward the upstream side surface of the frame from the power transmission mechanism.
Further, the pump gate is characterized in that the power transmission mechanism is a belt type speed reducer .
The pump gate is characterized in that a flap valve is attached to the discharge port at the end of the discharge flow path of the casing.
The pump gate has a pair of centrifugal pumps, a casing, a power transmission mechanism, and a submersible motor attached to the left and right sides of the frame body, and further partitions the pair of centrifugal pumps, casing, power transmission mechanism, and submersible motors. It is characterized by being installed symmetrically about the center line.
The pump gate is a flap-type pump gate that opens and closes the water channel by being installed so as to rotate about its upper part .
[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 perspective view showing a thin pump gate 100 according to an embodiment of the present invention, and FIG. 2 is a perspective view of the thin pump gate 100 as viewed from the opposite side. As shown in both figures, this thin pump gate 100 is configured by connecting and fixing two unit-type pumps 10 and 10 of the same standard in parallel, and attaching frame members 40 on both sides and the upper side thereof. Each component will be described below.
[0011]
FIG. 3 is a view showing one unit type pump 10, FIG. 3 (a) is a schematic side sectional view, and FIG. 3 (b) is an AA schematic sectional view of FIG. 3 (a). FIG. 4 is a perspective view showing a state in which the upstream surface of the frame 35 is cut out in one unit type pump 10 in the state shown in FIG.
[0012]
As shown in FIGS. 3, 4, 1, and 2, this unit type pump 10 has a box-shaped frame 35 (the upstream surface becomes the skin plate 351) whose downstream side is open. A casing 15 that forms a pump flow path (suction flow path 29 and discharge flow path 31) is attached inside, and an impeller storage portion 17 that protrudes from a lower portion of the casing 15 is provided. An impeller is provided in the impeller storage portion 17. 19, a reduction gear 21 is attached to the outside (downstream side) of the impeller storage portion 17 so as to be connected to the impeller 19, and an underwater electric motor (drive device) 23 is attached to an end of the reduction gear 21, A vortex pump V is formed by providing a suction port 14 in a portion of the frame 35 facing the impeller 19 of the skin plate 351 and providing a vortex space G between the suction port 14 and the impeller 19. ing. A backflow prevention valve (flap valve) 27 is attached to the discharge port 25 at the end of the discharge channel 31.
[0013]
Here, the impeller 19 is installed so that the rotation shaft 20 thereof is a horizontal axis (substantially horizontal to the flow of the water channel), so that the rotation surface of the impeller 19 is the surface of the frame 35 (skin plate 351) ( That is, it is substantially parallel to the surface of the thin pump gate 100).
[0014]
The speed reducer 21 is configured to decelerate and transmit the output of the drive shaft 24 to the rotary shaft 20 in a state where the rotary shaft 20 of the impeller 19 and the drive shaft 24 of the submersible electric motor 23 are installed in parallel. Yes. Specifically, a speed reducer that meshes a gear 211 attached to the drive shaft 24, an intermediate gear 212, and a gear 213 attached to the rotary shaft 20 to reduce the speed in a plane substantially perpendicular to the flow of the water channel. These are configured to be housed in a casing 215.
[0015]
The underwater electric motor 23 is attached from the gear 211 toward the skin plate 351 side. That is, the underwater electric motor 23 is installed at a position between the skin plate 351 and the speed reducer 21.
[0016]
By the way, since the diameter of the impeller 19 is large in the vortex pump V, when the rotary shaft 20 of the impeller 19 is installed so as to be the vertical axis (that is, as shown in FIG. 9B), the frame 35 (I.e., the thickness of the thin pump gate 100) is considerably increased, the weight is increased, the pump gate equipment is increased in size, and the construction cost of the pump gate is increased. Therefore, in this embodiment, the impeller 19 is installed as described above. As a result, the thickness of the entire frame 35 was reduced.
[0017]
In the present invention, the rotary shaft 20 and the submersible motor 23 are connected by a speed reducer 21 that decelerates in a plane substantially perpendicular to the flow of the water channel, and the submersible motor 23 is connected between the skin plate 351 and the speed reducer 21. Since it is installed at the position, the portion projecting to the downstream side of the impeller 19 is only the thickness of the speed reducer 21. From this point also, the thickness of the unit type pump 10 and the thin pump gate 100 as a whole can be reduced.
[0018]
The thin pump gate 100 is lowered into the water channel 1 by the vertical driving means (not shown) provided on the upper part of the lifting members 41 and 41 shown in FIG. 1 to close the water channel 1, and the water channel 1 flows backward from the downstream side. Shut off water. At this time, the backflow prevention valve 27 remains closed. On the other hand, in order to drain the water flowing from the upstream side to the downstream side, when the impeller 19 is rotated by driving the submersible motor 23 shown in FIG. 3, a vortex is generated in the vortex space G in front of the impeller 19 and the centrifugal force is generated. The upstream water pumped by the force and sucked from the suction port 14 is drained downstream from the discharge port 25 through the suction channel 29 and the discharge channel 31 by opening the backflow prevention valve 27.
[0019]
In the above embodiment, the thin pump gate 100 is configured by connecting and fixing a plurality of (two) unit type pumps 10 and 10, so that depending on the width of the pump gate and the amount of drainage required depending on the water channel. Not only can the unit pump 10 of the same standard be easily connected by connecting one or more units, but the unit pump 10 to be manufactured can be one type or a small amount of drainage with the same shape and structure. Since only different types of drainage heads need to be produced, the design and manufacture becomes easy. However, the present invention is not limited to the unit type, and a pump V or the like may be attached to a desired position of one frame 35 constituting the thin pump gate 100 as shown in FIG.
[0020]
And according to this invention, since the thickness of the thin pump gate 100 can be made thin as mentioned above, the weight is reduced in weight, a pump gate installation is reduced in size, and construction cost also decreases. In addition, the weight balance is improved and the aesthetic appearance is also excellent.
[0021]
Further, since the thin pump gate 100 according to the present invention can be thinned, in addition to the pull-up type gate as shown in FIGS. The thin pump gate 100 can be used as a flap type pump gate that opens and closes a water channel. That is, in the case of the conventional pump gates 80, 80-2, and 3 shown in FIGS. 9A to 9C, the thickness is large and cannot be used as a flap type gate. Since the pump gate 100 is thin, it can be used as a flap- type gate as in the case of a gate without a pump. This makes the pump gate equipment more compact than the pull-up type, has excellent aesthetics, has a simple civil engineering structure, and can reduce construction costs.
[0022]
FIG. 7 is a perspective view showing a thin pump gate 100 according to still another embodiment of the present invention. The thin pump gate 100 is different from the thin pump gate 100 shown in FIG. 5 only in that the left and right pumps V and the like attached to the frame 35 are installed symmetrically with respect to the center line separating them. It is. If comprised in this way, the weight balance of the right and left of the thin pump gate 100 will improve further. It goes without saying that this embodiment may be applied to the thin pump gate 100 using the unit type pumps 10 and 10 shown in FIGS.
[0023]
FIG. 8 is a view showing another embodiment of a unit type pump 10 used in the present invention. FIG. 8 (a) is a schematic side sectional view, and FIG. 8 (b) is an upstream surface of the frame 35. It is a perspective view which shows the state which notched.
[0024]
The unit type pump 10 shown in the figure is different from the unit type pump 10 shown in FIGS. 3 and 4 in the parts of the speed reducer 21 and the drive unit 23. The other parts are the same as those shown in FIGS. 3 and 4 and will not be described in detail.
[0025]
In other words, in this embodiment, the output of the drive shaft 24 of the submersible electric motor 23 is converted into a rotary shaft via an orthogonal shaft power transmission mechanism 241 using a bevel gear and a speed reducer 21 that decelerates in a plane substantially perpendicular to the flow of the water channel. It is comprised so that it may transmit to 20. Specifically, the drive shaft 24 of the submersible electric motor 23 is installed perpendicular to the flow of the water channel, the power is transmitted to the shaft 243 installed in parallel to the flow of the water channel by the orthogonal shaft power transmission mechanism 241, and attached to this shaft 243. The gear 211 and the gear 213 attached to the rotating shaft 20 are engaged (the gears 211 and 213 constitute the speed reducer 21), and these (including the orthogonal shaft power transmission mechanism 241) are accommodated in the casing 215. It is configured.
[0026]
When the output capacity of the submersible motor 23 is large and, therefore, the submersible motor 23 cannot be installed in parallel with the impeller 19 as shown in FIGS. 3 and 4, the orthogonal shaft power transmission to the power transmission mechanism as in this embodiment. The mechanism 24 may be added and the underwater electric motor 23 may be installed on the vertical axis (vertical). Of course, it may be installed in this way for other reasons.
[0027]
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. For example:
[0028]
(1) In the above embodiment, a vortex pump is used as a pump. However, the present invention is not limited to this, and a non-clog pump, a screw spiral pump, other centrifugal pumps, or the like may be used. In short, any structure that can be installed so that the drive shaft of the pump is substantially horizontal to the flow of the water channel may be used.
[0029]
(2) The number of pumps to be attached may be one or three or more.
[0030]
(3) The drive machine for driving the pump may be any other drive machine such as a hydraulic motor in addition to the electric motor.
[0031]
(4) The speed reducer is not limited to a gear mechanism, and may be any other speed reducer such as a belt system or a chain system. In short, any speed reducer that decelerates in a plane substantially perpendicular to the flow of the water channel may be used. Further, the connection between the pump and the driving machine is not limited to the speed reducer, but may be a power transmission mechanism that does not decelerate (for example, one that transmits power at a 1: 1 rotation ratio).
[0032]
(5) The gate can be installed in either a positive pressure gate system or a reverse pressure gate system. The unit type pump 10 shown in FIGS. 3 (a) and 8 (a) can be easily designed and installed according to the conditions of the place where the pump gate is installed. The shape of the upper and lower ends of the frame 35 is configured.
[0033]
【The invention's effect】
As described above in detail, according to the present invention, the pump gate can be thinned, the weight thereof can be reduced, the weight balance is improved, the aesthetics are excellent, the pump gate equipment is downsized, and the construction cost is reduced. I can plan.
[0034]
In addition, the pump gate thickness can be reduced, so that it can be used as a flap gate in addition to a pull-up gate, making the pump gate equipment more compact than the pull-up gate, excellent in aesthetics, and civil engineering. However, construction costs can be reduced.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a thin pump gate 100 according to an embodiment of the present invention.
FIG. 2 is a perspective view of a thin pump gate 100 as viewed from the opposite side.
FIGS. 3A and 3B are diagrams showing a single unit type pump 10, in which FIG. 3A is a schematic side cross-sectional view, and FIG. 3B is a schematic cross-sectional view taken along line AA in FIG.
4 is a perspective view showing a state in which the upstream surface of the frame 35 is cut away in one unit-type pump 10 in the state shown in FIG. 1. FIG.
FIG. 5 is a perspective view showing a thin pump gate 100 according to another embodiment.
FIG. 6 is a view showing a flap- type gate configured by using a thin pump gate 100 according to the present invention.
FIG. 7 is a perspective view showing a thin pump gate 100 according to still another embodiment of the present invention.
8A and 8B are diagrams showing another embodiment of the single unit type pump 10, in which FIG. 8A is a schematic sectional side view, and FIG. 8B is a cutaway view of the upstream surface of the frame body 35; FIG.
FIGS. 9A, 9B, and 9C are diagrams showing conventional pump gates 80, 80-2, and 3, respectively.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Water channel 100 Thin pump gate 10 Unit type pump 14 Suction port 15 Casing 17 Impeller storage part 19 Impeller 20 Rotating shaft 21 Reduction gear (power transmission mechanism)
211, 212, 213 Gear 215 Casing 23 Submersible electric motor (driving machine)
24 Drive shaft 25 Discharge port 27 Backflow prevention valve (Flap valve)
29 Suction flow path 31 Discharge flow path 35 Frame body 351 Skin plate V Pump 40 Frame member 41 Lifting member

Claims (5)

A drainage pump is incorporated in a gate that opens and closes the water channel, the pump is connected to a drive unit through a power transmission mechanism, and the pump is operated by the drive unit with the water channel closed by the gate. In the pump gate configured to drain the water on one side,
The gate is a box-shaped frame whose downstream side is released,
A casing that forms a suction flow path and a discharge flow path directed upward from the suction flow path is attached to the inside of the frame,
The pump is a centrifugal pump, and is installed at the lower part of the casing so that the rotation shaft is substantially horizontal to the flow of the water channel,
The power transmission mechanism is a power transmission mechanism that transmits power in a plane substantially perpendicular to the flow of the water channel , and is installed on the downstream side of the centrifugal pump.
The pump gate according to claim 1, wherein the driving machine is a submersible electric motor, and is installed next to the casing by being attached toward the upstream surface of the frame body from the power transmission mechanism . The pump gate according to claim 1, wherein the power transmission mechanism is a belt-type speed reducer. The pump gate according to claim 1 or 2, wherein a flap valve is attached to a discharge port at an end of a discharge flow path of the casing. A pair of centrifugal pump, casing, power transmission mechanism, and submersible motor are attached to the left and right sides inside the frame, and the pair of centrifugal pump, casing, power transmission mechanism, and submersible motor are centered on a center line that separates them. 4. The pump gate according to claim 1, wherein the pump gate is installed symmetrically. The pump gate according to any one of claims 1 to 4, wherein the pump gate is a flap-type pump gate that opens and closes a water channel by being installed so as to rotate about an upper portion thereof.

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