JP4486765B2 - Drainage drainage system - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a drainage gate of a drainage channel, and relates to a drainage facility installed in a drainage channel such as a river or a water channel. More specifically, the present invention relates to a drainage facility for a drainage channel having a drainage pump device, a gate for natural drainage, and a water control device in a drainage lock.
[0002]
[Prior art]
The gates of the drainage gates at the boundary between the sea and the river or the boundary between the main river and the tributary are normally opened to allow the upstream water with a high water level to flow downstream. It must be closed when the water level is high and backflow occurs. Normally, the water level on the tributary side (inner water side) is higher than the water level on the main river side (outside water side), and natural drainage is performed from the tributary side toward the main river side.
[0003]
On the other hand, when the water level on the main river side becomes higher than the water level on the tributary river side, the drainage gate is closed to prevent backflow. Further, a gate pump (registered trademark) in which a pump is incorporated in a gate of a drainage lock gate is known and used. In that case, when the water level on the main river side becomes higher than the water level on the tributary river side and the water flows backward, the gate pump of the drainage lock is closed and the water is forcibly drained. Conventionally, natural drainage is performed by opening the gate, and forced drainage is performed by a pump during reverse flow (when the internal water side water level exceeds the specified water level). In the gate pump, when the drainage operation is stopped, a check valve is provided in the gate pump so that drainage does not flow back into the pump from the discharge port of the drainage pump.
[0004]
However, immediately after the forced drainage is performed, there is a risk that dust will get entangled with this check valve, and there is also a possibility that an external force acts on the pump part and it is partially damaged. In order to avoid this, a high level of water-stopping is required especially for the gates of Xiamen, which are part of the embankment. Conventionally implemented gate pumps have an opening for attaching the pump to the gate, but as a device to prevent backflow of outside water when the operation is stopped, the upper hinge on the discharge side of the pump as described above. A flap-type check valve that opens and closes only.
[0005]
There was room for further improvement such as perfection of the water stop performance of the check valve. As described above, there has been a demand for a facility that can smoothly discharge natural drainage and that can smoothly perform trouble processing while satisfying the functions of the pump.
[0006]
[Problems to be solved by the invention]
The present invention was devised to solve the problems based on the background described above, and achieves the following objects.
The purpose of the present invention is to enable natural drainage even when the drainage flow on the pump side is stopped by a sluice gate installed independently of the pump during normal times (when the inner water level is higher than the outer water level). In providing drainage facilities for roads.
Another object of the present invention is to close the lock gate for natural drainage when an abnormality occurs in the pump and prevent the back flow by closing the water control door on the pump side, thereby improving the water stop and protecting the pump. It is to provide drainage facilities for drainage channels that facilitate the maintenance and inspection of pumps.
Still another object of the present invention is to provide a drainage facility for a drainage channel that allows forced drainage by a pump even when the gate for natural drainage is closed, and allows natural drainage on the pump side. .
Still another object of the present invention is to provide a drainage facility for a drainage channel that is configured to be able to stand by or store by pulling up only the pump to the ground when the pump is not used during natural drainage.
[0007]
Still another object of the present invention is to provide a water tank in the vicinity of the lock that prevents the intrusion of dust, and to enable the installation of a horizontal axis submersible pump without the need to dig into the water tank whose bottom is the same height as the drainage channel. In providing drainage facilities for roads.
[0008]
[Means for Solving the Problems]
The present invention solves the above problems by the following means.
That is, the drainage facility of the drainage channel of the present invention is
A drainage facility installed in a drainage channel having a drainage gate (2),
A drainage pump device (3) for drainage installed in the drainage gate (2) ;
A drainage pump (12) that constitutes a part of the drainage pump device (3) and can be lifted and lowered by a lifting device installed in the drainage pump device (3) ;
A water tank (5) provided at the drainage gate (2) and surrounding a suction-side water channel of the drainage pump device (3);
A drainage gate (7) provided in the drainage gate (2) and capable of natural drainage;
A water control device (4) provided on the discharge port side of the drainage pump (12) and having a water control door (17) which is provided on the drainage gate (2) so as to be movable up and down and can be opened and closed;
A conduit (26) disposed on the discharge port side of the water control door (17);
Said conduit (26) when the natural drainage provided on the discharge port side of it can pass through the water flow in the open state, the drainage pump (12) during the forced draining the time outages are in the closed state drainage pump ( 12) It consists of a check valve (27) that prevents the running water from passing through.
In addition, the drainage facility of the other drainage channel of the present invention is
A drainage facility installed in a drainage channel having a drainage gate (2),
A drainage pump device (30) for drainage installed in the drainage gate (2) ;
A drainage pump (32, 50) that constitutes a part of the drainage pump device (30) and can be lifted and lowered by a lifting device installed in the drainage pump device (30) ;
A water tank (5) provided at the drainage gate (2) and surrounding a suction-side waterway of the drainage pump device (30);
A drainage gate (7) provided in the drainage gate (2) and capable of natural drainage;
It has a detachable pipe (33a) arranged on the discharge port side of the drainage pump (32, 50) and fixed to the water channel bottom (31), and when the drainage pump (32, 50) is lifted, the drainage pump (32, 50) 50) a detachable device (33) for detaching;
An on-off valve device (34) which is attached to the discharge side of the detachable pipe (33a) and controls the drainage flow by an on-off valve (41) which is rotatably provided inside;
A conduit (46) disposed on the outlet side of the on-off valve device (34);
It is provided on the discharge port side of the on- off valve device (34) and is open during natural drainage so that running water can pass, and closed when the drainage pump (32, 50) is stopped during forced drainage. It consists of a check valve (27) for preventing running water from passing through the drainage pump (32, 50).
[0009]
The drainage pump is a horizontal axis submersible pump in which the axis of the main shaft for driving the impeller when in use is substantially horizontal, and may be provided to the drainage lock so as to be movable up and down. That is, the horizontal axis submersible pump referred to in the present invention is an axial flow pump that is used in a state where the axis of the main shaft that drives the impeller is substantially horizontal. There is an effect that the horizontal-axis submersible pump can be installed at a position closer to the bottom of the water channel, and it is also possible to lift it on the water surface.
[0010]
Furthermore, the bottom of the water tank may be the same height as the drainage channel. It is effective to install a horizontal axis submersible pump. Further, the water control door may be provided on the drainage lock gate so as to be movable up and down and opened and closed. Since the drain pump is configured independently of the drain pump, the drain pump is effective in that it can be raised and lowered without restriction of the water control door.
[0011]
Furthermore, the water control door may be rotatably provided to the drainage pump device so as to be opened and closed. There is an effect that the drainage pump device becomes compact. Furthermore, the drainage pump may be configured to be separated from a fixed portion of the drainage pump device and to be lifted upwardly from the drainage lock. Since only the drainage pump can be pulled up on the surface of the water, the lifting weight is reduced and maintenance inspection is facilitated.
[0012]
Furthermore, the drainage pump may be a vertical shaft submersible pump in which the axis of the main shaft that drives the impeller during use is substantially vertical. That is, the vertical shaft submersible pump is an axial flow pump or a diagonal flow pump that uses the axis of the main shaft that drives the impeller in a substantially vertical state. It is effective to install in a channel with a hollow or in a different direction.
[0013]
Furthermore, a part of the drainage channel may be branched, the drainage channel may be formed as the water tank, and the drainage pump device and the water control device may be provided. It is effective when applied to a drainage channel with a narrow channel width. Furthermore, a dust removing device may be provided on the suction side of the water tank. It is effective in preventing the invasion of garbage.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Embodiment 1 of the present invention will be described below with reference to the drawings. FIG. 1 is a plan view showing the overall configuration of the drainage facility of the present invention. 2 and 3 are front views thereof, FIG. 2 is a cross-sectional view taken along the line AA in FIG. 1, and FIG. 3 is a cross-sectional view taken along the line BB in FIG. Each device is provided in a drainage lock 2 that forms the base of the drainage facility 1. Drainage flows as a natural flow through the drainage channel from the waterway a on the tributary side to the waterway b on the main river side.
[0015]
The drainage lock 2 made of concrete forms an irregular rectangular gate. The drainage lock 2 is provided so as to cross the drainage channel. Two drainage pump devices 3 and a water control device 4 are disposed on the drainage channel wall side of the drainage gate 2, and suction ports of the respective drainage pump devices 3. A water tank 5 is provided so as to surround the water channel on the side. The two drainage pump devices 3 may be one on one side only.
[0016]
In addition, a drain port 6 is provided on the bottom of the central channel of the drainage lock 2, and a lock gate 7 is provided so as to be openable and closable while covering the drain port 6. The drain port 6 is substantially square or substantially rectangular, and the Xiamen gate 7 is also substantially square or substantially rectangular according to this shape. The lock gate 7 moves up and down along the drainage lock 2 and opens and closes. An opening / closing device 8 for opening and closing the lock gate 7 is provided above the drain lock 2. Is provided. The opening / closing device 8 is driven manually by a handle or the like or by an electric motor, and its structure and function are well known and are not the gist of the present invention.
[0017]
The lock gate 7 is configured to move up and down using a doorhold metal 9 embedded in the drainage lock 2 as a guide, and the lock gate 7 is opened and closed by a rack bar 10. Normally, the drainage lock 2 is installed at the boundary between the waterway a on the tributary river side and the main river side b, and the drainage flows as a natural flow from i to b as described above. Therefore, when drained as a natural flow, the Xiamen gate 7 is normally open.
[0018]
FIG. 2 shows a state in which the lock gate 7 is closed. When the lock gate 7 is open, the rack bar 10 is moved up and down by the operation of the opening / closing device 8 provided in the upper part of the drainage lock 2. Xiamen gate 7 connected to 10 moves upward and is in an open state. When the Xiamen gate 7 is opened, the water passes through the drain port 6 as a natural flow and is drained.
[0019]
Next, the drainage pump device 3 will be described with reference to FIG. Two drainage pump devices 3 are installed on the side of the water channel wall of the drainage gate 2 in a state where the gate gate 7 is sandwiched in parallel with the gate gate 7. On the suction port side of the drainage pump device 3, a water tank 5 surrounded by concrete constituting a frame body is formed in a U shape. In addition to the natural drainage to the Xiamen gate 7, the drainage also flows to this tank 5. A dust removing device 11 is provided on the tributary river side i of the water tank 5 to remove the dust flowing from the tributary river side a and prevent the invasion of dust into the water tank 5.
[0020]
The dust removing device 11 has a simple plate-like structure mainly composed of a screen, and the dust entangled with the dust removing device 11 is removed in a state of being underwater or a dust lifting device (not shown). ) If necessary, it is lifted on the water surface and processed. The dust removing device 11 is provided only on the suction side of the water tank 5 on the drainage pump device 3 side. Usually, most of the natural drainage passes through the Xiamen gate 7. Therefore, the dust removing device 11 is a small type that is simple and does not include a lifting device.
[0021]
A drainage pump device 3 is installed in the water tank 5, and a horizontal axis submersible pump 12 in which a rotating shaft is used as a drainage pump in a substantially horizontal state is adopted as the drainage pump device 3. The horizontal axis submersible pump 12 is an axial flow pump that uses the axis of the main shaft that drives the impeller in a substantially horizontal state. The horizontal axis submersible pump 12 is movable in the vertical direction along a guide 13 installed in the drainage lock 2. The horizontal axis submersible pump 12 is provided with a guide portion 12a for raising and lowering guidance on the discharge port side, and this guide portion 12a is sandwiched between the guides 13 of the drainage lock 2 to move the horizontal axis submersible pump 12 up and down. Guide in the direction.
[0022]
The vertical guiding operation of the horizontal axis submersible pump is performed by an elevating device 14 provided at the upper part of the drainage lock 2. A rack bar 15 is connected to the elevating device 14, and a pinion (not shown) of the elevating device 14 meshing with the rack bar 15 is rotationally driven to move the horizontal axis submersible pump 12 in the vertical direction. Normally, the horizontal-axis submersible pump 12 is lowered to the drainage channel bottom 16, but is raised when inspection or the like becomes necessary. A water control device 4 is provided on the discharge port side of the horizontal axis submersible pump 12.
[0023]
This water control device 4 is a device for controlling the drainage flowing in the horizontal axis submersible pump 12, and when there is a backflow from the main stream side, the water control door 17 of this water control device 4 is closed to control the water. I do. The water control door 17 is normally open. The water control device 4 is installed with a water control door 17 sandwiched between the discharge port side of the horizontal axis submersible pump 12 and the drainage lock 2. The water control door 17 is configured to be movable in the vertical direction by an opening / closing device 18 provided in the upper part of the drainage lock 2.
[0024]
A rack bar 21 is connected to a hanging bracket 19 provided at the upper part of the water control door 17 via a hanging pin 20, and the rack bar 21 moves up and down by operating a handle 18 a of the opening and closing device 18. The water control door 17 is raised and lowered. The operation configuration of the handle 18a is through a known means such as a gear. This configuration is the same in the case of the lifting operation of the horizontal axis submersible pump 12. In the present embodiment, the operation of the opening / closing device 18 is the handle 18a, but it may be an operation driven by a motor.
[0025]
The rack bars 21 and 15 are covered with respective rack covers 22 and 23 provided on the upper parts of the opening and closing device 18 and the lifting device 14. The raising / lowering guidance of the water control door 17 is performed along the guide 24 provided in the drainage lock 2. In addition, a watertight device 25 is attached to the water control door 17, and maintains a watertight state in close contact when moving along the guide 24. For this reason, when the water control door 17 is closed, water leakage is completely prevented.
[0026]
In the case of a typhoon, close the Xiamen gate 7 and perform forced drainage by the horizontal axis submersible pump 12. If a problem occurs in the pump part, the water control door 17 on the horizontal axis submersible pump 12 side should be closed. Close to completely prevent backflow. However, when the water level is low, for example, when there is not much difference in elevation between the water level on the A side and the B side, the natural flow and the reverse flow are alternated. The water control door 17 on the pump 12 side is left open.
[0027]
Forced drainage is performed during reverse flow, and a small amount of natural wastewater is handled during normal flow. Conversely, when trouble occurs in the horizontal axis submersible pump 12 or the like, the lock gate 7 and the water control door 17 are closed to block the flow of drainage. Since the water tank 5 is in a still water state, the horizontal axis submersible pump 12 may be lifted to the ground for inspection and the like, but underwater work can also be performed safely. The horizontal-axis submersible pump 12 is raised and stored on the ground when the drainage channel is in a normal stable natural drainage state for a long time.
[0028]
Further, a conduit 26 is provided on the discharge port side of the horizontal axis submersible pump 12, and a flap type check valve 27 is provided on an end surface of the conduit 26. The check valve 27 is opened by the flowing water pressure of the drainage flowing through the conduit 26 from the horizontal axis submersible pump 12 during natural drainage, and is allowed to pass running water. When the forced drainage pump operation is suspended, the pump is closed by the reverse flow pressure.
[0029]
When in the closed state, the drainage of water in the horizontal axis submersible pump 12 is prevented. In this way, since the water control door 17 is installed and the check valve 27 is also provided, the certainty of preventing the reverse flow is enhanced. Dust such as driftwood or vinyl flows in the flowing water. Immediately after the dust is forcibly drained by the horizontal axis submersible pump 12, it bites into the check valve 27 of the discharge port of the horizontal axis submersible pump 12. There is. In addition, an abnormality may occur in the pump part due to a collision with dusts floating on the outside water side. In this way, a device such as a check valve does not function due to a trouble in the pump facility, and there is a possibility that the running water on the outside water side will continuously flow into the inside water side.
[0030]
The present invention has been developed in order to avoid this trouble in consideration of these problems, and to facilitate measures when trouble occurs, in order to shut off the water flow to the suction port side of the pump. In addition to the water control door, there is also a gate in the drainage lock. In the present embodiment, the horizontal axis submersible pump 12 is adopted, but it is advantageous in setting the minimum water flow depth as the minimum continuous operation depth at which no vortex is generated during the pump operation, compared with the vertical axis submersible pump. It is. Here, the vertical shaft submersible pump is an axial flow pump or a diagonal flow pump that uses the axis of the main shaft that drives the impeller in a substantially vertical state.
[0031]
That is, although it depends on various standards, generally in the case of a vertical shaft submersible pump, the minimum water flow depth H1 is said to be 2.5D (D = pump diameter). Further, the suction height is approximately D, as is the approximate pump diameter (see FIG. 8). On the other hand, H1 in the case of the horizontal axis submersible pump 12 is normally (D + 300 mm). This means that if there is no change in the height of the drainage channel bottom, the horizontal axis submersible pump 12 can be installed at a position closer to the water channel bottom on the pump suction port side (see FIG. 4).
[0032]
This is because low water level operation is possible and there is no need to dig the bottom of the channel. When the bottom of the drainage channel is dug down, there is a lot of troubles such as sedimentation of earth and sand always occurs, there is a possibility of removing it and there is a risk of damage to equipment. In the case of this Embodiment 1, since the horizontal-axis submersible pump is employ | adopted, these problems can be avoided.
[0033]
Further, since the horizontal axis submersible pump 12 is a front guide vane type in which guide vanes are arranged in front of the impeller, that is, on the suction port side, the water passage section inside the pump can be increased, and the drainage in the pump can be increased. There is also an advantage of good permeability. On the other hand, in the case of a vertical shaft submersible pump, in order to install this pump effectively, it is necessary to dig the bottom of the water channel on the suction port side. Thus, the horizontal axis submersible pump is more effective as a drainage pump installed in a normal drainage channel.
[0034]
(Embodiment 2)
Next, a drainage facility when a removable drainage pump device is applied will be described. FIG. 4 shows a second embodiment of the present invention and is a front view of a drainage facility to which a detachable drainage pump device 30 is attached. FIG. 5 is a view taken in the direction of the arrow X in FIG. The installation position of the drainage pump device 30 is provided on both sides of the drainage lock 2 as in the first embodiment, and is fixed to the water channel bottom 31 of the drainage lock 2.
[0035]
The drainage pump device 30 includes a horizontal axis submersible pump 32, a lifting device 14 that raises and lowers the horizontal axis submersible pump 32, an attachment / detachment device 33 fixed to the bottom of the water channel, and a drainage flow that passes through the horizontal axis submersible pump 32. An opening / closing valve device 34 for controlling the opening / closing valve 34, an operation device 35 for opening / closing the opening / closing valve device 34, a conduit 26 for drainage guidance, a check valve 27, and the like.
[0036]
A horizontal axis submersible pump 32 is detachably attached to the suction side end face of the attachment / detachment pipe 33a of the attachment / detachment device 33 which is fixed at the bottom of the drainage lock 2 at the center. A method for attaching and detaching the horizontal axis submersible pump 32 will be described with reference to FIGS. Two rod-shaped lifting guides 36 are provided between the detachable pipe 33a and the upper part of the drainage lock 2 and the horizontal axis submersible pump 32 straddles the lifting guide 36 via a detachable arm 37 and a pressing member 38. . The elevating guide 36 is erected on the detachable pipe 33a, and its upper end is fixed to the upper wall surface of the drainage lock 2 via a guide support 36a.
[0037]
The detachable arm 37 is substantially L-shaped, and presses the two lifting guides 36 from the inside with the recesses to restrict lateral movement. Further, the detachable arm 37 straddles the pressing member 38 on the tips of the two detachable arms 37. Therefore, the horizontal runout of the horizontal submersible pump 32 is prevented. Further, the horizontal-axis submersible pump 32 swings slightly in the ascending / descending direction via a fulcrum 37 a of the detachable arm 37.
[0038]
On the other hand, an elevating device 14 is provided in the upper part of the drainage lock 2 to perform the elevating operation of the horizontal axis submersible pump 32. The lifting device 14 is provided with a rack bar 15, and one end thereof is attached to a hanging metal fitting 39 of the horizontal axis submersible pump 32 via a hanging pin 40. The rack rod 15 is provided with a rack in the ascending / descending direction and meshes with a gear (not shown) of the elevating device 14. The rack bar 15 is moved in the ascending / descending direction via a gear by the handle operation of the elevating device 14.
[0039]
The state of FIG. 4 shows a state in which the horizontal axis submersible pump 32 is lowered and united with the detachable pipe 33a. However, when removing the horizontal axis submersible pump 32, the horizontal axis submersible pump 32 is moved upward by the lifting device 14 as it is. And separated from the detachable tube 33a. At this time, the horizontal-axis submersible pump 32 is pulled upward via the rack bar 15 while maintaining the installed state by the lifting guide 36.
[0040]
Moreover, since the detachable pipe 33a is fixed to the water channel bottom of the drainage lock 2, it remains stationary without moving. FIG. 6 shows this state. That is, the apparatus below the detachable pipe 33a is left underwater, and only the horizontal axis submersible pump 32 is pulled up on the water surface. By doing so, it is not necessary to collect all the drainage pump device 3 in inspection and the like, and it is only necessary to pull up the horizontal axis submersible pump 32. Therefore, the lifting load by the lifting device 14 is small, and maintenance is performed. Is also easy.
[0041]
When the inspection or the like is finished, the horizontal axis submersible pump 32 is lowered through the lifting guide 36 and installed at the original position. With respect to the end surface of the detachable tube 33a, the horizontal axis submersible pump 32 swings around the fulcrum 37a of the detachable arm 37 so that the end surfaces are in close contact with each other. In this way, the horizontal axis submersible pump 32 is combined with the detachable pipe 33 a in a state where it is pressed by the weights of the lifting guide 36, the rack bar 15, and the horizontal axis submersible pump 32.
[0042]
An on-off valve device 34 is attached to the discharge side end face of the detachable pipe 33a, and the drainage flow is controlled by an on-off valve 41 provided rotatably inside. As shown in FIG. 7, the on-off valve device 34 is provided with an on-off valve 41 that can rotate around a shaft 43 provided in the radial direction of the valve pipe 42 at the center of the valve pipe 42. The amount of drainage can be controlled by the rotation angle.
[0043]
The on-off valve 41 is rotated by rotating the drive shaft 44 by an operating device 35 provided at the top of the drainage lock 2. A connection joint 45 directly connected to the shaft 43 is provided on the valve pipe 42, and a drive shaft 44 is connected to the connection joint 45 to rotate the on-off valve 41. When the on-off valve 41 is rotated 90 degrees from the closed state, the on-off valve 41 is in the maximum open state.
[0044]
Although this on-off valve 41 is normally open, when trouble occurs in the check valve 27 provided on the discharge port side of the horizontal axis submersible pump 32 or when trouble occurs in the horizontal axis submersible pump 32 itself, Closed to prevent back flow in the horizontal submersible pump 32. This on-off valve 41 corresponds to the water control door 17 of the first embodiment, and has the same water control function although there is a difference in that it opens and closes instead of opening and closing by linear movement.
[0045]
A conduit 46 is connected to the discharge port side of the valve pipe 42, and a check valve 27 is provided on the end surface of the conduit 46 on the discharge port side. The check valve 27 is opened by flowing water pressure in the case of normal natural drainage, but is closed to prevent backflow in the case of backflow.
[0046]
(Embodiment 3)
FIG. 8 shows a third embodiment of the present invention, and is an example in which a vertical submersible pump 50 is applied instead of the horizontal submersible pump 32 to the basic configuration of the second embodiment described above. In this case as well, the pump portion is detachable so that it can be separated from the detachable tube 33a in the same manner as described above. However, the suction port of the vertical shaft submersible pump 50 faces the bottom of the water channel, so Different from the axial submersible pump 32. In this case, as described above, in order to perform the low water depth continuous operation in the water channel in which the water bottom is continuous at the same height, it is necessary to dig at least the water tank bottom on the suction port side.
[0047]
In addition, there is a difficulty that natural drainage that passes through the pump cannot be performed smoothly. However, it is effective when the water channel in the vicinity of the pump suction port is in the horizontal direction or when the water channel at the pump suction port is a depression.
[0048]
(Embodiment 4)
The description up to the third embodiment described above is an example of equipment applied to a drainage channel when it is not branched as shown in FIG. 9, but FIG. It is an example showing the case where the is provided. In this case, the drainage lock 60 is divided, but the lock gate 61 is installed in the drainage lock 60 of the original drainage channel, and the drainage pump device 62 and the water control device 63 are provided in the branched water channel. ing.
[0049]
This branched water conduit is in the form of a water tank 64. Further, the check valve 65 is provided on the discharge port side of the drainage pump device 62 as in the above-described embodiment. A dust removing device 66 is provided on the suction port side of the water tank 64, and the basic configuration of this embodiment is the same as that described above. Therefore, the detailed structure is also the same as the above-described example, and the detailed description is omitted. In the case of the present embodiment, there is a problem that the space for branching and the basic facilities such as concrete are costly, but this configuration is effective when the channel width is narrow. In the case of this example, a switching gate 67 is provided at the water conduit inlet. It is recommended to use different gates according to the situation of drainage flow.
[0050]
(Other embodiments)
As mentioned above, although embodiment of this invention was described, the object of this invention is not limited to this. For example, the water control door of the water control device has been described as a water control door that opens and closes linearly in Embodiment 1, and as a valve that opens and closes rotationally in Embodiment 2, respectively, It may be.
[0051]
Moreover, in Embodiment 1 mentioned above, the lock gate 7 was arrange | positioned in waterways a, such as a river of the tributary side of the drainage lock 2 comprised with concrete. However, the same function is achieved even if the Xiamen gate 7 is arranged on the main river side of the drainage lock 2, so the Xiamen gate 7 is arranged on the main channel side of the drainage lock 2. You may do it. Similarly, although the water control door 17 was arrange | positioned in waterways i, such as a river by the side of the tributary of the water tank 5, you may arrange | position on the waterway b side of the main river side.
[0052]
【The invention's effect】
As explained above, by providing a gate on the drainage gate separately from the water control door of the drainage pump device, even if trouble occurs on the pump side, only the water control door on the pump side is closed for inspection etc. Can do. As a result, the drainage facility is configured to be stable and protected, and the facility can be safely maintained and easily maintained.
[Brief description of the drawings]
FIG. 1 is a plan view showing an overall configuration of a drainage facility according to the present invention.
FIG. 2 is a cross-sectional view taken along the line AA in FIG.
3 is a cross-sectional view taken along the line BB in FIG. 1. FIG.
FIG. 4 is a cross-sectional view showing a drainage pump device according to a second embodiment.
FIG. 5 is a view on arrow X of FIG. 4;
6 is a cross-sectional view showing that the horizontal axis submersible pump in FIG. 4 is separated. FIG.
7 is a cross-sectional view taken along the line CC of FIG. 4 and shows an on-off valve.
FIG. 8 is a cross-sectional view showing a drainage pump device according to a third embodiment.
FIG. 9 is an overall view of the drainage system of the present invention shown in the first to third embodiments.
FIG. 10 is an overall view of the drainage system of the present invention shown in the fourth embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Drainage facility 2 ... Drainage lock 3 ... Drainage pump device 4 ... Water control device 5 ... Water tank 7 ... Lock gate 8 ... Opening and closing device 12, 32 ... Horizontal axis submersible pump 17 ... Water control door 27 ... Check valve 33 ... Detachable device 41 ... On-off valve 50 ... Vertical shaft submersible pump

Claims (7)

A drainage facility installed in a drainage channel having a drainage gate (2),
A drainage pump device (3) for drainage installed in the drainage gate (2) ;
A drainage pump (12) that constitutes a part of the drainage pump device (3) and can be lifted and lowered by a lifting device installed in the drainage pump device (3) ;
A water tank (5) provided at the drainage gate (2) and surrounding a suction-side water channel of the drainage pump device (3);
A drainage gate (7) provided in the drainage gate (2) and capable of natural drainage;
A water control device (4) provided on the discharge port side of the drainage pump (12) and having a water control door (17) which is provided on the drainage gate (2) so as to be movable up and down and can be opened and closed;
A conduit (26) disposed on the discharge port side of the water control door (17);
Said conduit (26) when the natural drainage provided on the discharge port side of it can pass through the water flow in the open state, the drainage pump (12) during the forced draining the time outages are in the closed state drainage pump ( 12) A drainage facility for a drainage channel comprising a check valve (27) for preventing passage of running water inside A drainage facility installed in a drainage channel having a drainage gate (2),
A drainage pump device (30) for drainage installed in the drainage gate (2) ;
A drainage pump (32, 50) that constitutes a part of the drainage pump device (30) and can be lifted and lowered by a lifting device installed in the drainage pump device (30) ;
A water tank (5) provided at the drainage gate (2) and surrounding a suction-side waterway of the drainage pump device (30);
A drainage gate (7) provided in the drainage gate (2) and capable of natural drainage;
It has a detachable pipe (33a) arranged on the discharge port side of the drainage pump (32, 50) and fixed to the water channel bottom (31), and when the drainage pump (32, 50) is lifted, the drainage pump (32, 50) 50) a detachable device (33) for detaching;
An on-off valve device (34) which is attached to the discharge side of the detachable pipe (33a) and controls the drainage flow by an on-off valve (41) which is rotatably provided inside;
A conduit (46) disposed on the outlet side of the on-off valve device (34);
It is provided on the discharge port side of the on- off valve device (34) and is open during natural drainage so that running water can pass, and closed when the drainage pump (32, 50) is stopped during forced drainage. drainage of drainage consisting check valve (27) for preventing the water flow passage of said drain pump (32, 50). In the drainage facility of the drainage channel according to claim 1 or 2 ,
The drainage system for a drainage channel, wherein the drainage pump (12, 32) is a horizontal axis submersible pump in which an axis of a main shaft that drives an impeller when in use is substantially horizontal. In the drainage facility of the drainage channel according to claim 1 or 2 ,
The drainage of the drainage channel, wherein the bottom of the water tank (5) has the same height as the bottom of the drainage channel. In the drainage facility of the drainage channel according to claim 2 ,
The drainage pump (50) is a vertical axis submersible pump in which an axis of a main shaft that drives an impeller in use is substantially vertical. In the drainage facility of the drainage channel according to claim 1 or 2 ,
A part of the drainage channel is branched to form a water conduit, and this water conduit is formed as the water tank (64), and the drainage pump device (62) and the water control device (63) are formed in the water tank (64). Drainage system for drainage channels characterized by installation. In the drainage facility of the drainage channel according to claim 1 or 2 ,
A drainage facility for a drainage channel, wherein a dust removing device (11, 66) for removing dusts flowing into the water tank (5, 64) is provided.

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