JP5236794B2 - Pump gate - Google Patents

Description

  The present invention comprises one or more door gates, one end of which is supported on a vertically arranged rotating shaft, and includes a door gate facility for opening and closing a water channel by opening and closing the door gate, and a door gate for raising and lowering (gate). The present invention relates to a door gate facility that opens and closes a water channel by raising and lowering the door gate, and particularly relates to a pump gate that is provided with a pump in the door gate and can drain upstream water downstream with the water channel closed. is there.

  Currently, a pump gate facility is installed as a small-scale drainage facility at the junction of the main river and the tributaries to prevent flooding of the tributaries. In other words, when the main river increases due to heavy rain, the pump gate facility gate is closed to prevent the water on the main river from flowing back to the tributary, and the water upstream from the tributary is forced to the main river by the pump. Is draining.

  FIG. 1 is a schematic sectional side view showing a conventional pump gate facility of this type. This pump gate equipment includes a gate 101 that opens and closes a water channel 100, a pump 102 (submersible pump) attached to the gate 101, a lifting member 103 attached to the gate 101, and a lifting member 103 that moves the lifting member 103 up and down. An opening / closing mechanism (consisting of a spindle or rack opening / closing mechanism) 104 for opening and closing, a concrete structure or steel frame 105 for installing the opening / closing mechanism 104 on the upper part of the gate 101, a handrail 106, and the like are provided. When the river increases, the open / close mechanism 104 is driven to lower the gate 101, close the water channel 100, and drive the pump 102 to drain the water upstream of the tributary to the downstream (Honkawa side).

JP 2002-38455 A JP 2000-204536 A

  In the above conventional pump gate equipment, the gate 101 and the pump 102 (submersible pump) are integrated, and the gate 101 uses a slide gate or a roller gate that moves up and down in the vertical direction. Since the outlet 102b including the opening 102a and the flap valve for preventing backflow protrudes from the side surface of the gate 101, there is a limit to the pump 102 ascending, and in order to raise the pump 102 high, a concrete structure or steel It was necessary to enlarge the mount 105.

  Conventionally, as shown in FIG. 2, one end is supported by a vertically arranged rotating shaft 110, and opens and closes the water channel 100 by rotating horizontally around the rotating shaft 110 (door body). As shown in FIG. 3, one end is supported on a swing shaft 110 arranged vertically, and the water channel 100 is rotated horizontally around the rotation shaft 110 as shown in FIG. There is a miter-type door gate facility having a door gate (door body) 111 that opens and closes. It is also conceivable to attach the pump 112 to the door gate 111 of such a swing type or miter type door gate facility. However, since the suction port 112a and the discharge port 112b of the pump 112 protrude from the side surface of the door gate 111, the opening of the water channel 100 is hindered, and in order to completely open the water channel 100, one side of the water channel 100 It is necessary to provide large pits 113 on the side wall (see FIG. 2) and both side walls (see FIG. 3).

  The present invention has been made in view of the above points, and provides a thin pump gate that does not hinder the opening and closing of the gate of a swing type or miter type door gate facility, and the raising of the door gate of a lift type door gate facility. The purpose is to do.

  In order to solve the above problems, the present invention comprises one or more door gates that are supported at one end by a vertically arranged rotating shaft and that open and close by rotating horizontally around the rotating shaft. In the door gate of the door gate facility that opens and closes the water channel by opening and closing the water channel, with the water channel closed by the door gate, a suction port is opened upstream of the water channel, and a discharge port is opened downstream, and at least partly Is provided in a pump gate characterized in that a water gate in a door gate is provided in a vertical direction, and a nozzle of a jet pump for draining water on the upstream side to the water flow in the door gate is arranged in the door gate water channel.

  Further, the present invention provides a door gate provided with a door gate that opens and closes the water channel by ascending and descending, with the water channel closed by the door gate, and a suction port on the upstream side of the water channel. A door gate water channel having an outlet opening and at least a portion arranged in a vertical direction is provided, and a nozzle of a jet pump for draining upstream water downstream is disposed in the door gate water channel. Located at the pump gate.

  Further, the present invention is characterized in that, in the pump gate, a backflow prevention valve is provided at a discharge port of the water passage in the door gate.

Further, the present invention is characterized in that, in the pump gate, the discharge port of the waterway in the door gate is arranged at a position higher than the highest water level on the downstream side of the water channel, and a backflow prevention valve can be omitted from the discharge port. To do.

  Also, the present invention provides the pump gate, wherein the door gate is fully open and fully closed, and an inclined surface with which the bottom surface of the door gate contacts is provided on the bottom surface of the water channel, and the door gate and the door gate are provided. The load of the pump is supported by the inclined surface through the bottom surface of the door gate.

According to the present invention, in a state where the water channel is closed by the door gate , the water inlet in the door gate is provided with the suction port on the upstream side of the water channel and the discharge port opened on the downstream side, and at least part of which is arranged in the vertical direction. Since the nozzle of the jet pump that drains the upstream water downstream is arranged in the waterway in the door gate, there is nothing that protrudes from the side of the door gate, and when the door gate is opened, the door gate is on the side of the water channel Because it closes and opens the surface of the waterway, it does not become a hindrance such as passing. In addition, the structure does not stand up above the waterway, and the scenery and sunlight are not harmed. In addition, when the door gate is open, the door gate is close to the side of the waterway, so it is sufficient to use a crane facility with the minimum required lifting capacity in the overhaul of the door gate and pump. It is possible to maintain and manage the door gate facility with a vehicle (for example, a load-type truck crane) equipped with

Further, according to the present invention, in a state in which the water channel is closed by the raising and lowering gate , the suction port is opened on the upstream side of the water channel, the discharge port is opened on the downstream side, and at least a part thereof is arranged in the vertical direction. Since the nozzle of the jet pump that drains the water on the upstream side is arranged in the vertical part of the waterway in the door gate, there is nothing protruding from the side of the door gate, and there is a lifting mechanism that raises and lowers the door gate It is simple and there is no need to enlarge the concrete structure or steel mount to which the lifting mechanism is attached.

  Further, according to the present invention, since the backflow prevention valve is provided at the downstream opening of the waterway in the door gate waterway, the water on the downstream side of the waterway passes through the doorway waterway while the impeller of the pump or the nozzle of the jet pump is stopped. There is no backflow of water upstream.

  Further, according to the present invention, the opening on the downstream side of the waterway in the doorway water channel is disposed at a position higher than the highest water level on the downstream side of the waterway, so that the water on the downstream side of the waterway does not flow back through the waterway in the door gate. Therefore, it is not necessary to provide a backflow prevention valve, and backflow can be completely prevented.

  Further, according to the present invention, with the door gate fully opened and fully closed, an inclined surface with which the bottom surface of the door gate abuts is provided on the bottom surface of the water channel, and the load of the pump provided on the door gate and the door gate is Since it supports with an inclined surface through the bottom face of a door gate, compared with the cantilever structure which supports a door gate only with a rotating shaft, the rigidity of a rotating shaft and the door gate itself can be made small, and cost reduction can be aimed at. On the other hand, in the cantilever structure in which the door gate is always supported only by the rotation shaft, it is necessary to increase the rigidity of the rotation shaft and the door gate, which increases the cost.

It is a sectional side view which shows schematic structure of the conventional pump gate installation. It is a figure which shows the schematic structural example at the time of attaching a pump to the door gate of the conventional door gate equipment, FIG. 2 (a) is a top view, FIG.2 (b) is a sectional side view. It is a figure which shows the example of schematic structure at the time of attaching a pump to the door gate of the conventional door gate equipment, FIG. 3 (a) is a top view, FIG.3 (b) is a sectional side view. 4A and 4B are diagrams illustrating a schematic configuration example of a pump gate according to the present invention, in which FIG. 4A is a plan view and FIG. 2B is a side cross-sectional view (AA cross-sectional view). It is a sectional side view which shows the schematic structural example of the pump gate which concerns on this invention. It is a top view which shows the schematic structural example of the pump gate which concerns on this invention. 7A and 7B are diagrams showing a schematic configuration example of a pump gate according to the present invention, in which FIG. 7A is a plan view and FIG. 7B is a side cross-sectional view (AA cross-sectional view). It is a sectional side view which shows the example of schematic structure of the pump gate which concerns on this invention. It is a sectional side view which shows the example of schematic structure of the pump gate which concerns on this invention. It is a sectional side view which shows the schematic structural example of the pump gate which concerns on this invention. It is a sectional side view which shows the schematic structural example of the pump gate which concerns on this invention. It is a sectional side view which shows the example of schematic structure of the pump gate which concerns on this invention. It is a figure which shows the schematic structural example of the pump gate which concerns on this invention, Fig.13 (a) top view, FIG.13 (b) is AA sectional drawing of (a), FIG.13 (c) is (a) B-. It is B sectional drawing. It is a figure which shows the schematic structural example of the pump gate which concerns on this invention, FIG.14 (a) top view, FIG.14 (b) is (a) AA sectional drawing, FIG.14 (c) is (a) BB. It is sectional drawing.

Embodiments of the present invention will be described below based on the drawings.
[Embodiment 1]
FIG. 4 is a view showing a schematic configuration example of a pump gate according to the present invention, FIG. 4 (a) is a plan view, and FIG. 4 (b) is a side cross section (AA cross section) of a door gate (door body). is there. In the figure, reference numeral 10 denotes a water channel provided at the junction of the main river and the tributary river. This pump gate is a pump gate including a door gate 11 called a swing gate. The door gate 11 is supported by a rotating shaft 12 with one end vertically arranged, and rotates in a horizontal direction around a support column 15. A state in which the rotary shaft 12 supporting the door gate 11 rotates around the support column 15 and closes the water channel 10 is a state in which the door gate 11 is fully closed and is in contact with the side wall 10a (the door gate 11 is in a position indicated by a one-dot chain line). State) is called fully open.

  The door gate 11 is provided with a suction port 13a that opens to the upstream side of the water channel 10 and a discharge port 13b that opens to the downstream side in a state where the water channel 10 is closed by the door gate 11, and the door gate 11 extends vertically in the vertical direction. A water channel 13 is provided. The door gate water channel 13 reaches the top of the door gate 11, and a pump impeller 14 for draining water upstream of the water channel 10 downstream is disposed in a vertical portion between the suction port 13a and the discharge port 13b. . The impeller 14 is connected to a rotating shaft of a driving machine 17 such as an electric motor via a shaft 16 and is rotated by the driving machine 17. The discharge port 13b is provided with a flap valve 18 rotatably supported by a hinge pin 18a on the downstream side of the door gate 11 as a backflow prevention valve.

  In the pump gate configured as described above, when the driving machine 17 is started and the impeller 14 is rotated, water on the tributary side of the water channel 10 is sucked from the suction port 13a, rises in the water gate 13 in the door gate, and flaps from the discharge port 13b. The valve 18 is pushed up and flows downstream. WL1 indicates the water level on the upstream side of the water channel 10, and WL2 indicates the water level on the downstream side of the water channel 10. As shown in FIG. 4, when the downstream water level WL2 is higher than the upstream water level WL1, if the impeller 14 stops for some reason, the flap valve 18 is closed by the downstream water pressure, and the downstream water is kept in the door gate. It does not flow upstream through the water channel 13. That is, backflow is prevented. In the figure, an example in which two door gate water channels 13 are arranged in the door gate 11 and a pump impeller 14 is arranged in each door gate 11 is provided. However, one or more door gate water channels 13 are provided, and each door gate water channel 13 is provided. An impeller 14 may be arranged. The arrow J indicates the direction of the water flow flowing from the tributary side to the main river side.

  As described above, the pump gate is provided with the door gate water channel 13 provided with the suction port 13a and the discharge port 13b in the door gate 11 of the door gate facility, and the configuration in which the impeller 14 is disposed in the door gate water channel 13 is adopted. As a result, the pump gate is slimmed without large protrusions appearing on both sides of the door gate. As a result, when the door gate 11 is fully open, that is, at the position indicated by the alternate long and short dash line in FIG. 4A, the door gate 11 approaches in a state of being in contact with the side wall 10a of the water channel 10 in parallel. There is no need to expand the water channel 10 even if the door gate facility is used as a pump gate.

  Further, by installing a driving machine 17 such as an electric motor at the top of the door gate 11, it becomes possible to use a normal outdoor type driving machine for the driving machine 17, and to the driving machine underwater like a conventional pump gate. It is economical because it does not use a motor. Further, since the drive unit 17 is out of the door gate 11, daily inspections are easy to perform, and the water gate 13 in the door gate reaches the top of the door gate 11 and opens, so the impeller 14 and the shaft 16. Since it can be taken out in the vertical direction through the water gate 13 in the door gate including the pump rotating body such as the above, it is possible to improve the maintainability at the time of overhauling.

[Embodiment 2]
FIG. 5 is a side cross-sectional view (cross section taken along line AA in FIG. 4 (a)) of a door gate (door body) showing a schematic configuration example of a pump gate according to the present invention. In FIG. 5, the same reference numerals as those in FIG. 4 denote the same parts. The same applies to other drawings. This pump gate is different from the pump gate of FIG. 4 in that the position of the discharge port 13b of the door gate waterway 13 is higher than the highest water level HWL2 on the downstream side of the waterway 10. Thereby, the flap valve 18 as a backflow prevention valve can be omitted. Further, when the backflow prevention valve is the flap valve 18, if foreign matter is caught between the end of the discharge port 13 b and the flap valve 18, the backflow cannot be completely prevented, but the position of the discharge port 13 b is set here in the water channel 10. Since the position is higher than the highest water level HWL2 on the downstream side, backflow can be completely prevented.

  4 and 5, the pump gate provided with the door gate 11 called a swing gate is shown. However, the present invention is not limited to this, and one end is vertically arranged as shown in FIG. A suction port 13a as shown in FIG. 4B and FIG. 5 is provided inside each gate 11 of the miter gate that is supported by the rotary shaft 12 and includes a pair of gates 11 that rotate in the horizontal direction around the support column 15. In addition, a door gate water channel 13 including a discharge port 13b may be provided, and the impeller 14 may be disposed in the door gate water channel 13.

[Embodiment 3]
7A and 7B are diagrams showing a schematic configuration example of a pump gate according to the present invention. FIG. 7A is a plan view, and FIG. 7B is a side sectional view of a door gate (door body). This pump gate is a pump gate including a door gate 11 called a swing gate. Similarly to the door gate 11 shown in FIG. 4A, the door gate 11 is supported by a rotating shaft 12 that is vertically arranged at one end, and rotates in a horizontal direction around a support column 15. Further, the door gate 11 is also provided with a door gate water channel 13 having a suction port 13a and a discharge port 13b, which is the same as the door gate 11 shown in FIG.

In this pump gate, a jet nozzle 20 of a jet pump (jet pump) is disposed in a vertical portion of the water gate 13 in the door gate. The jet nozzle 20 is connected to a jet water supply pipe 21 connected to the discharge port of the jet generating pump 22. A jet water suction pipe 23 is connected to the suction port of the jet generation pump 22, and a strainer 24 is attached to the lower end of the jet water suction pipe 23. The jet generating pump 22 is activated, and the water on the upstream side of the water channel 10 (or water on the downstream side) is sucked by the jet water suction pipe 23 and supplied to the jet nozzle 20 through the jet water supply pipe 21. At this time, foreign substances accompanying water sucked into the jet water suction pipe 23 are removed by the strainer 24. Thereby, the jet water 25 spouts from the jet nozzle 20, pushes up the water in the waterway 13 in the door gate, and discharges it from the discharge port 13b. Thereby, the water on the upstream side of the water channel 10 is sucked in from the suction port 13 a, passes through the door gate water channel 13, and is discharged from the discharge port 13 b to the downstream side.

As described above, in the pump gate, the gate gate 11 of the door gate equipment is provided with the door gate water channel 13 having the suction port 13a and the discharge port 13b, and the jet nozzle 20 is arranged in the gate gate water channel 13. As a result, the pump gate is slimmed without large protrusions appearing on both side surfaces of the door gate 11. Since a result, Tobiramon 11 fully opened, i.e. when in the position indicated by the dashed line in FIG. 7 (a), Tobiramon 11 are parallel in a state in which contact with the side wall 10a of the channel 10, the water flow during natural flow The water channel 10 is not expanded even if the door gate facility is used as a pump gate.

  Further, by installing the jet generating pump 22 outside the door gate 11, it becomes possible to use a normal outdoor pump, and it is economical because no submersible motor pump is used unlike a conventional pump gate. Excellent in properties. Moreover, since there is nothing rotating in the door gate waterway 13, it is hard to produce a failure. Since the jet generating pump 22 and its driving machine are out of the door gate 11, daily inspection is easy to perform.

  Moreover, as shown in FIG. 7A, the jet generating pump 22 is installed on the side of the water channel 10, and the jet water supply pipe 21 is attached to the rotary shaft 12 or the nearest position. By attaching the jet water supply pipe 21 to the rotating shaft, the jet water supply pipe 21 does not have flexibility. Even at the position closest to the rotary shaft 12, the displacement of the contact point when the door 11 is fully opened and fully closed is small, so that it is not necessary to provide equipment for providing excessive flexibility, which is effective.

[Embodiment 4]
FIG. 8 is a side sectional view of a door gate (door body) showing a schematic configuration example of a pump gate according to the present invention. This pump gate is different from the pump gate of FIG. 7 in that the position of the discharge port 13b of the door gate waterway 13 is higher than the highest water level HWL2 on the downstream side of the waterway 10. Thereby, the flap valve 18 as a backflow prevention valve can be omitted. Further, when the backflow prevention valve is the flap valve 18, if foreign matter is caught between the end of the discharge port 13 b and the flap valve 18, the backflow cannot be completely prevented, but the position of the discharge port 13 b is set here in the water channel 10. Since the position is higher than the highest water level HWL2 on the downstream side, backflow can be completely prevented.

  7 and 8 show a pump gate having a door gate 11 called a swing gate. However, the pump gate is not limited to this, and one end is vertically arranged as shown in FIG. A suction port 13a as shown in FIG. 7B and FIG. 8 is provided inside each gate 11 of the miter gate, which is supported by the rotary shaft 12 and includes a pair of door gates 11 that rotate in the horizontal direction around the support column 15. In addition, the door gate water channel 13 provided with the discharge port 13 b may be provided, and the jet nozzle 20 may be disposed in the door gate water channel 13.

[Embodiment 5]
FIG. 9 is a cross-sectional view showing a schematic configuration example of a pump gate according to the present invention. The pump gate includes a door gate 31 that opens and closes the water channel 10, a suspension member 32 attached to the door gate 31, and a gate opening / closing mechanism that opens and closes the gate 31 by moving the suspension member 32 up and down (spindle and rack). 1 is provided with a concrete structure or steel mount 34, a ladder 35, a handrail 36 and the like for installing the gate open / close mechanism 33 on the upper portion of the door gate 31. This is the same as the conventional pump gate shown in FIG.

  In this pump gate, the door gate water channel 13 is provided in the door gate 31 and includes a suction port 13a and a discharge port 13b and extends vertically in the vertical direction. An impeller 14 of a pump that drains water on the upstream side of the water channel 10 to the downstream side is disposed in a vertical portion of the water passage 13 in the door gate. The impeller 14 is connected to a rotating shaft of a driving machine 17 such as an electric motor via a shaft 16 and is rotated by the driving machine 17. The discharge port 13b is provided with a flap valve 18 rotatably supported by a hinge pin 18a on the downstream side of the door gate 31 as a backflow prevention valve.

  In the pump gate having the above-described configuration, when the door gate 31 is lowered and the lower end abuts against the bottom surface 10c of the water channel 10 to close the water channel and the impeller 14 is rotated by starting the drive unit 17, water on the tributary side of the water channel 10 is sucked The air is sucked in from the port 13a, rises in the water passage 13 in the door gate, pushes up the flap valve 18 from the discharge port 13b, and flows downstream. Thus, the door gate water channel 13 provided with the suction inlet 13a and the discharge outlet 13b is provided in the door gate 31, and the both sides of the door gate 11 are adopted by adopting a configuration in which the impeller 14 is disposed in the door gate water channel 13. The pump gate is slimmed without large protrusions appearing on the surface. As a result, the gate 11 can be easily moved up and down, and there is no need to increase the size of the gate opening / closing mechanism 33, the concrete structure, the steel pedestal 34, or the like.

  In addition, by installing the driving machine 17 such as an electric motor at the top of the door gate 31, it becomes possible to use a normal outdoor type driving machine for the driving machine 17, which is excellent in economic efficiency. Moreover, since the drive machine 17 has come out of the door gate 31, it becomes easy to perform daily inspection. Further, since the door gate water channel 13 reaches the top of the door gate 31 and opens, it can be taken out vertically through the door gate water channel 13 including the pump rotating body such as the impeller 14 and the shaft 16. Maintenance management at the time of inspection can be improved.

[Embodiment 6]
FIG. 10 is a side sectional view showing a schematic configuration example of the pump gate according to the present invention. This pump gate is different from the pump gate of FIG. 9 in that the position of the discharge port 13 b of the door gate waterway 13 is higher than the highest water level HWL 2 on the downstream side of the waterway 10. Thereby, the flap valve 18 (refer FIG. 9) as a backflow prevention valve can be omitted. Further, when the backflow prevention valve is the flap valve 18, if foreign matter is caught between the end of the discharge port 13 b and the flap valve 18, the backflow cannot be completely prevented, but the position of the discharge port 13 b is set here in the water channel 10. Since the position is higher than the highest water level HWL2 on the downstream side, backflow can be completely prevented.

[Embodiment 7]
FIG. 11 is a side sectional view showing a schematic configuration example of a pump gate according to the present invention. The pump gate includes a door gate 31 that opens and closes the water channel 10, a suspension member 32 attached to the door gate 31, and a gate opening / closing mechanism that opens and closes the gate 31 by moving the suspension member 32 up and down (spindle and rack). 9), a concrete structure or a steel pedestal 34 for installing the gate opening / closing mechanism 33 on the upper part of the door gate 31, a ladder 35, a handrail 36, etc. This is the same as the pump gate shown in FIG.

In this pump gate, a jet nozzle 20 of a jet pump (jet pump) is disposed in the waterway 13 in the door gate. The jet nozzle 20 is connected to a jet water supply pipe 21 connected to the discharge port of the jet generating pump 22. A jet water suction pipe 23 is connected to the suction port of the jet generation pump 22, and a strainer 24 is attached to the lower end of the jet water suction pipe 23. The jet generating pump 22 is activated, and the water on the upstream side of the water channel 10 (or water on the downstream side) is sucked by the jet water suction pipe 23 and supplied to the jet nozzle 20 through the jet water supply pipe 21. Thereby, the jet water 25 spouts from the jet nozzle 20, pushes up the water in the waterway 13 in the door gate, and discharges it from the discharge port 13b. Thereby, the water on the upstream side of the water channel 10 is sucked in from the suction port 13 a, passes through the door gate water channel 13, and is discharged from the discharge port 13 b to the downstream side.

  As described above, in the pump gate, the door gate waterway 13 having the suction port 13a and the discharge port 13b is provided in the door gate 31 of the door gate facility, and the jet nozzle 20 is disposed in the door gate water passage 13. As a result, the pump gate is slimmed without large protrusions appearing on both side surfaces of the door gate 31. As a result, the gate 31 can be easily moved up and down, and there is no need to enlarge the gate opening / closing mechanism 33, the concrete structure, the steel mount 34, or the like.

  Further, by installing the jet generating pump 22 outside the door gate 11, it becomes possible to use a normal outdoor pump, and it is economical because no submersible motor pump is used unlike a conventional pump gate. Excellent in properties. Moreover, since there is nothing rotating in the door gate waterway 13, it is hard to produce a failure. Since the jet generating pump 22 and its drive unit are out of the door gate 31, daily inspections can be easily performed.

[Embodiment 8]
FIG. 12 is a side sectional view of a door gate (door body) showing a schematic configuration example of a pump gate according to the present invention. This pump gate is different from the pump gate of FIG. 11 in that the position of the discharge port 13b of the door gate water channel 13 is higher than the highest water level HWL2 on the downstream side of the water channel 10. Thereby, the flap valve 18 (refer FIG. 11) as a backflow prevention valve can be omitted. Further, when the backflow prevention valve is the flap valve 18, if foreign matter is caught between the end of the discharge port 13 b and the flap valve 18, the backflow cannot be completely prevented, but the position of the discharge port 13 b is set here in the water channel 10. Since the position is higher than the highest water level HWL2 on the downstream side, backflow can be completely prevented.

  13A and 13B are diagrams showing the configuration of a pump gate according to the present invention. FIG. 13A is a plan view, FIG. 13B is an AA section, and FIG. 13C is a BB section. This pump gate is a pump gate having a door gate 11 called a swing gate, similar to the pump gate shown in FIGS. As shown in the figure, the bottom of the door gate 11 is formed in an inverted mountain shape in cross section. An inclined surface 10b is formed at the fully closed position and the fully opened position of the door gate 11 on the bottom surface 10c of the water channel 10 so that one of the two inclined surfaces of the bottom inverted mountain shape of the door gate 11 contacts.

  By providing the inclined surface 10b at the fully closed position and the fully opened position of the door gate 11 on the bottom surface 10c of the water channel 10 as described above, when the door gate 11 reaches the fully closed position or the fully opened position, the bottom of the door gate 11 is inclined. Since the surface abuts on the inclined surface 10b and the load of the door gate 11 or the like is supported by the inclined surface 10b via the inclined surface of the bottom of the door gate 11, the cantilever structure that supports the door gate 11 only by the rotary shaft 12 In comparison with this, the rigidity of the rotary shaft 12 and the door gate 11 itself can be reduced, and the cost can be reduced. On the other hand, in the cantilever structure in which the door gate 11 and the like are always supported only by the rotary shaft 12, it is necessary to increase the rigidity of the rotary shaft 12 and the door gate 11, which increases the cost.

  14A and 14B are diagrams showing another configuration of the pump gate according to the present invention. FIG. 14A is a plan view, FIG. 14B is an AA sectional view, and FIG. 14C is a BB sectional view. Indicates. This pump gate is a pump gate provided with two door gates 11 called miter gates like the pump gate shown in FIG. As shown in the figure, the bottom of the door gate 11 is formed in an inverted mountain shape in cross section. An inclined surface 10b is formed at the fully closed position and the fully opened position of the door gate 11 on the bottom surface 10c of the water channel 10 so that one of the two inclined surfaces of the bottom inverted mountain shape of the door gate 11 contacts.

  By providing the inclined surface 10b at the fully closed position and the fully opened position of the door gate 11 on the bottom surface 10c of the water channel 10 as described above, when the door gate 11 reaches the fully closed position or the fully opened position, the bottom of the door gate 11 is inclined. Since the surface abuts on the inclined surface 10b and the load of the door gate 11 or the like is supported by the inclined surface 10b via the inclined surface of the bottom of the door gate 11, the cantilever structure that supports the door gate 11 only by the rotary shaft 12 In comparison with this, the rigidity of the rotary shaft 12 and the door gate 11 itself can be reduced, and the cost can be reduced. On the other hand, in the cantilever structure in which the door gate 11 and the like are always supported only by the rotary shaft 12, it is necessary to increase the rigidity of the rotary shaft 12 and the door gate 11, which increases the cost.

  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. It should be noted that any shape, structure, and material not directly described in the specification and drawings are within the scope of the technical idea of the present invention as long as the effects and advantages of the present invention are exhibited.

  The present invention provides a door gate water channel having a suction port on the upstream side of the water channel, a discharge port opened on the downstream side, and at least a part of which is arranged in the vertical direction, with the water channel closed in the door gate, Since the nozzle of the jet pump that drains the upstream water to the downstream side is arranged in the gate waterway, there is nothing protruding from the side of the door gate, when the door gate is opened, the door gate is closer to the side of the waterway, Because the waterway surface is opened, it does not become an obstacle such as passing. In addition, the structure does not stand up above the waterway, and the scenery and sunlight are not harmed. In addition, when the door gate is open, the door gate is close to the side of the waterway, so it is sufficient to use a crane facility with the minimum required lifting capacity in the overhaul of the door gate and pump. It can be used as a pump gate capable of maintaining and managing the door gate facility with a vehicle (for example, a load-type truck crane) equipped with

10 water channel 11 door gate 12 axis of rotation
13 Waterway in door gate 14 Pump impeller 15 Post 16 Shaft 17 Drive 18 Flap valve 20 Jet nozzle 21 Jet water supply pipe 22 Jet generation pump 23 Jet water suction pipe 24 Strainer 25 Jet water 31 Door gate (gate)
32 Hanging member 33 Gate opening / closing mechanism 34 Concrete structure or steel mount 35 Ladder 36 Handrail

Claims (5)

  A door gate facility that has one or more door gates that are supported at one end by a vertically arranged rotating shaft and that opens and closes by rotating horizontally around the rotating shaft, and that opens and closes a water channel by opening and closing the door gate. In the door gate, in the state where the water channel is closed by the door gate, a suction port is opened on the upstream side of the water channel, a discharge port is opened on the downstream side, and at least a part of the water channel is arranged in the vertical direction. And a nozzle of a jet pump for discharging upstream water to the downstream side in the water channel in the door gate.   In the door gate of the door gate facility provided with a door gate that opens and closes the water channel by ascending and descending, with the water channel closed by the door gate, a suction port is opened upstream of the water channel, and a discharge port is opened downstream, A pump gate characterized in that a door gate water channel at least partially disposed in a vertical direction is provided, and a nozzle of a jet pump for draining upstream water downstream is disposed in the gate gate water channel. The pump gate according to claim 1 or 2,
A pump gate characterized in that a backflow prevention valve is provided at a discharge port of the water passage in the door gate. The pump gate according to claim 1 or 2 ,
A pump gate characterized in that a discharge port of the waterway in the door gate is arranged at a position higher than the highest water level on the downstream side of the water channel, and a backflow prevention valve can be omitted from the discharge port . The pump gate according to claim 1, wherein
With the door gate fully open and fully closed, an inclined surface with which the bottom surface of the door gate abuts is provided on the bottom surface of the water channel,
A pump gate, wherein the door gate and a load of the pump provided on the door gate are supported by the inclined surface through a bottom surface of the door gate.

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