JP4066356B2 - Pump mounting structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a mounting structure for a pump that is installed at a boundary portion of a water channel and transfers water from one water channel to the other water channel.
[0002]
[Prior art]
As a conventional pump mounting structure, in the sewage relay manhole, for pump maintenance, etc., the pump is moved up and down along the guide pipe from the opening of the manhole and is detachable at a predetermined position in the manhole was there.
[0003]
Further, as a water stop door installed in a river or a water channel, a cylindrical cylindrical sealing surface disposed on the outer periphery of an opening of a water channel or the like and having a central axis in the width direction of the water channel, and the cylinder A radial gate comprising a partially cylindrical surface with an arc-shaped cross section having substantially the same radius of curvature as the seal surface, and a swingable openable / closable door body for contacting and sealing with the cylindrical seal surface. What was called was proposed. This radial gate is often used for discharge gates such as dams, etc., and has a center of rotation at the center of the door height, and a part attached to a swing arm that can be swung around this center. It is known as a gate configured with a cylindrical surface as a water stop surface.
[0004]
[Patent Document 1]
JP-A-11-132198 [0005]
[Patent Document 2]
JP-A-2001-107341 [0006]
[Problems to be solved by the invention]
According to the prior art disclosed in Patent Document 1 described above, a pump along a guide pipe or a guide pipe is used to raise and lower a heavy pump along the guide pipe during maintenance of the pump. In addition to installing a large space above the water channel, such as installing equipment to lift and lower the pump, the pump is lifted to a position higher than the water channel, and then the pump is placed on the side of the water channel for maintenance, and vice versa. Therefore, a very complicated procedure of installing the pump in the water channel was required, and thus a compact pump mounting structure that facilitated workability was desired.
[0007]
On the other hand, when the radial gate according to Patent Document 2 described above is installed in a small-scale waterway such as a farmland irrigation waterway or an urban rainwaterway, the water level of the downstream waterway rises above the water level of the upstream waterway due to rainfall or the like. Even so, in order to transfer water to the downstream side while preventing backflow, a pump is provided on the door body that can be opened and closed by swinging operation, and the pump is operated while stopping the flow from the downstream side by the door body. It is necessary to transfer the upstream water to the downstream side.
[0008]
However, the above-mentioned farmland irrigation canals and rainwater canals are often constructed as closed waterways for safety and prevention of overflow, and when applied to such closed waterways, heavy-weight pumps are used as door bodies. If the pump is mounted in a posture that protrudes from the water stop surface on the bulging side of the door body with an arc cross section so that it can be mounted in a balanced manner in the thickness direction, the projecting part of the pump will be There is a problem that the door cannot be fully opened and closed by abutting against the wall, and in order to avoid abutment, the door is opened with a gap from the water stop surface of the door to the closed water channel by the projecting distance of the pump. When installed, there was a problem that overflow occurred from the gap.
[0009]
Therefore, if the pump is mounted so as not to protrude from the water stop surface on the bulging side of the arc-shaped door body, that is, as a result, protrudes to the swing arm side, the door body to which the heavy pump is mounted is installed. There is a risk that the weight balance will be lost, resulting in inadequate strength, vibrations in the pump in operation, and pump performance deterioration. As a result, there was a problem of increasing costs.
[0010]
The above-described problem similarly occurs even when the pump is attached to a door body that can be opened and closed through a slide mechanism that moves up and down along a linear trajectory.
[0011]
In view of the above-described conventional drawbacks, the present invention is to provide a mounting structure of a pump that can be mounted in a state in which overflow does not occur without increasing the strength of a swing arm or a door body.
[0012]
[Means for Solving the Problems]
[0013]
In order to achieve the above-mentioned object, the first characteristic configuration of the mounting structure of the pump according to the present invention is installed at the boundary of the water channel as described in claim 1 of the claims , and from one water channel A pump mounting structure for transferring water to the other water channel, wherein the pump is mounted on a door body that can be freely opened and closed at a boundary portion of the water channel, and the door body is attached to an upper edge portion of the door body. An extension portion having a length longer than the maximum protrusion length of the pump protruding from the surface portion of the pump is formed, and the extension portion is configured to be watertight in a state where the door body is closed .
[0014]
According to such a configuration, in the state where the door body is closed, overflow from the water channel can be reliably prevented by the extension portion formed at the upper edge portion of the door body, and moreover, it protrudes from the surface portion of the door body. Since the door can be opened and closed without the pump that makes contact with the upper wall of the closed water passage, the weight can be increased without extremely costly reinforcement of the door and the door opening and closing mechanism. This makes it possible to install the pump, which is an object, on the door body in a well-balanced manner without causing performance deterioration due to vibrations. And in the open state of a door body, maintenance can be performed directly with respect to the pump attached to the door body.
[0015]
In the first characteristic configuration described above, it is preferable that the door body is attached so as to be openable and closable via a slide mechanism that moves up and down along a linear locus.
[0016]
In addition to the first characteristic configuration described above, it is preferable that the door body whose section is formed in an arc shape is attached so as to be openable and closable via a swinging mechanism that moves up and down along an arc-shaped locus.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of a pump mounting structure according to the present invention will be described below. As shown in FIGS. 1 and 2, a metal door body 2 is attached to a boundary portion of a rainwater channel 1 in an urban area through a swing mechanism 4 that moves up and down along an arcuate locus, and is attached to the door body 2. A radial gate to which a horizontal shaft pump 5 for transferring water from one water channel 1a (upstream water channel) to the other water channel 1b (downstream water channel) is attached is configured.
[0018]
The horizontal shaft pump 5 includes a pump body 5a including a motor unit disposed coaxially with a guide cover, and an impeller key-connected to a drive shaft of the motor unit, and a suction side of the pump body 5a. The suction cover 5b connected to the flange and the flap valve 5c for preventing backflow attached to the discharge side of the pump body 5a are inserted into a circular mounting hole 2b formed below the door body 2. The door 2 is closed and bolted or welded so that the pump shaft is in a horizontal posture.
[0019]
The swing mechanism 4 includes a winding mechanism 4b provided on a support plate 4a disposed across the width direction of the rainwater channel 1, a pulling wire 4c attached to the left and right upper ends of the door body 2, respectively. The operation panel 4d operates the winding mechanism 4b. The door body 2 is opened by the winding operation of the wire 4c by the winding mechanism 4b, and the door body 2 is closed by the feeding operation.
[0020]
The door body 2 is a partial cylindrical surface whose longitudinal cross-sectional shape is formed in an arc shape, and is side-viewed V that is pivotally supported around the horizontal axis P in the width direction of the rainwater channel 1 so as to be swingable in the vertical direction. The pair of left and right rocking arms 3 are welded and fixed to the tip side. The position of the horizontal axis P is provided so as to coincide with the center position of the arc of the door body 2, and both sides of the door body 2 are centered on the swing axis by the swing operation by the swing mechanism 4. The rainwater channel 1 can be opened and closed by moving up and down along a circular locus.
[0021]
A horizontal axis pump in which an extended portion 2 a is formed on the upper edge portion of the door body 2 so as to project in the horizontal direction downstream of the rainwater channel 1, and its extended length projects from the surface portion of the door body 2. It is set to a length equal to or greater than 5 maximum protrusion length. Therefore, even if the door body 2 is swung, the horizontal shaft pump 5 protruding downstream from the door body 2 is swung in the range on the door body 2 side from the locus of the extending portion 2a. The protrusion does not interfere with any other equipment. Here, the extension part 2a may be bolt-fixed other than by being welded to the upper edge part of the door body 2, or may be based on another fixing method. Furthermore, it may be integrally formed.
[0022]
The downstream water channel 1b of the boundary portion of the rainwater channel 1 is formed as a closed circuit, and the bottom wall and both side walls of the boundary part are covered with a sealing rubber that covers the periphery of the door 2 in a closed state and realizes water tightness. Is provided, and a seal member 10 is provided in a portion of the upper wall portion 1d of the side wall and the edge portion 1e of the upper wall portion constituting the closed path which is in contact with the extending portion 2a. Therefore, when the door body 2 is in the closed state, overflow of water from the downstream rainwater channel 1b is prevented. Here, the seal member 10 may be provided on the extended portion 2a side corresponding to the upper edge portion 1d of the side wall and the edge portion 1e of the upper wall portion constituting the closed path. May be appropriately selected in consideration of weather resistance and the like.
[0023]
In the rainwater channel 1 in which the radial gate having the above-described configuration is installed, as shown in FIG. 3, when the door body 2 is opened, rainwater naturally flows from the upstream water channel 1 toward the downstream water channel, and is shown in FIG. Thus, when the door body 2 is closed, such as when there is a lot of rainfall, the back flow from the downstream water channel 1b whose water level has risen to the upstream water channel 1a is prevented by the door body 2, and the horizontal axis pump 5 is By operating, rainwater is transferred from the upstream water channel 1a to the downstream water channel 1b. More specifically, by operating the horizontal axis pump 5 in the closed state in which the door body 2 is lowered, rainwater in the upstream water channel 1a is sucked from the suction side end of the horizontal axis pump 5, and the flap valve 5c is caused by the water pressure. Is pushed open and drained from the discharge side end to the downstream water channel 1b, and when the horizontal shaft pump 5 is stopped when the door body 2 is in the closed state, drainage from the upstream side to the downstream side is stopped. At the same time, the flap valve 5c is automatically closed by the combined action of its own weight and the downstream water pressure to prevent the back flow of water. Here, in the state in which the door body 2 is closed, the downstream water channel 1b is completely closed by the door body 2, and therefore no overflow occurs from the downstream water channel 1b.
[0024]
Furthermore, when maintaining the horizontal axis pump 5, the pump is exposed above the water surface by swinging the door 2 upward by the swing mechanism 4 and maintaining the open posture shown in FIG. In such a state, various repairs can be performed.
[0025]
Another embodiment will be described below. In the above-described embodiment, the horizontal shaft pump 5 is directly welded and fixed to the door body 2. However, the horizontal shaft pump 5 is fitted into the mounting hole 2b of the door body 2 via a seal member, and the pump body 5a. May be welded or bolted to the swing arm 3.
[0026]
In the above-described embodiment, the pump installed in the radial gate has been described. However, as shown in FIGS. 5 and 6, the flat door body 2 can be opened and closed through a slide mechanism that moves up and down along a linear locus. It may be attached to. Also in this case, an extension portion 2a having a length longer than the maximum projecting length of the pump projecting from the surface portion of the door body 2 is formed at the upper edge portion of the door body 2, and as shown in FIG. Needless to say, the extending portion 2a is configured to be watertight in a state in which 2 is closed.
[0027]
In the above-described embodiment, the horizontal shaft pump 5 is attached to the door body 2 so that the shaft center is in a horizontal posture. However, the horizontal shaft pump 5 is directed from the downstream water channel 1a toward the upstream water channel 1b. You may install in the door body 2 in the inclination attitude | position which inclines with a downward slope.
[0028]
The above-described pump mounting structure is suitable for installing a pump in a small-scale waterway such as a farmland irrigation waterway or an urban rainwaterway, but is not limited thereto. The pump mounting structure, the gate assembly structure, and the selection of materials and shapes of other members are not particularly limited as long as the effects of the present invention are exhibited.
[0029]
In the embodiment described above, the mounting structure of the pump installed at the boundary of the water channel has been described. However, the boundary of the water channel in the present invention indicates a part where the pump is installed, and is physically attached to the water channel. It does not mean that the boundary portion is configured, and the portion where the pump is installed is referred to as the boundary portion even in any one continuous water channel.
[0030]
【The invention's effect】
As described above, according to the present invention, it is possible to provide a pump mounting structure that can be mounted in a state in which overflow does not occur without significantly increasing the strength of a swing arm, a door body, or the like. Became.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view illustrating an embodiment of the present invention. FIG. 2 is a vertical cross-sectional view illustrating an embodiment of the present invention. FIG. 3 is an explanatory view of a door body in an opened state. FIG. 5 is an explanatory diagram when another embodiment is described and applied to a slide gate. FIG. 6 is an explanatory diagram when another embodiment is applied to a slide gate. ]
1: Waterway (rain waterway)
1a: One water channel (upstream water channel)
1b: The other water channel (downstream water channel)
2: Door 2b: Extension part 3: Swing arm 4: Swing mechanism 5: Pump (horizontal shaft pump)

Claims (3)

An installation structure of a pump that is installed at the boundary of a water channel and transfers water from one water channel to the other water channel,
The pump is attached to a door body that can be freely opened and closed at the boundary of the water channel, and the upper edge of the door body is longer than the maximum projecting length of the pump projecting from the surface of the door body. A pump mounting structure in which an extending portion is formed and the extending portion is configured to be watertight in a state where the door is closed. The pump mounting structure according to claim 1, wherein the door body is mounted so as to be openable and closable via a slide mechanism that moves up and down along a linear trajectory. The pump mounting structure according to claim 1, wherein the door body whose section is formed in an arc is attached so as to be openable and closable via a swinging mechanism that moves up and down along an arcuate locus.

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