JP5926152B2 - Parent-child flap gate - Google Patents

Description

  The present invention relates to a parent-child flap gate.

  Conventionally, as shown in FIG. 5, the upper gate is supported by the water channel 30, and the parent gate can swing between a first lower swing position D <b> 1 that closes the water channel 30 and a second upper swing position U <b> 2 that opens the water channel 30. 31 and the upper end is supported by the parent gate 31 and swings between a third lower swing position D3 that closes the opening 31a of the parent gate 31 and a fourth upper swing position U4 that opens the opening 31a of the parent gate 31. There is a parent-child type flap gate provided with a flexible child gate 32 (see Patent Document 1).

  The parent gate 31 is opened / closed by a chain 33 as first opening / closing means, and the child gate 32 is opened / closed by a chain 34 as second opening / closing means.

  Normally, the parent gate 31 is swung to the first lower swing position D1 that closes the water channel 30, and the child gate 32 is swung to the third lower swing position D3 that closes the opening 31a.

  At the start of discharge, the chain 34 is first pulled to swing the child gate 32 upward to the fourth upper swing position U4 to open the opening 31a. When the water level is lowered, the chain 33 is then pulled to The gate 31 is swung upward to the second upper swinging position U2 to fully open the water channel 30.

  As a result, the child gate 32 has a smaller area on which the water pressure acts than the parent gate 31, so that when the child gate 32 is opened, the labor and power required to open the parent gate 31 are not required. Further, if the child gate 32 is opened first and discharged, the water level is lowered, so that labor and power required to open the parent gate 31 are reduced.

JP 2002-285529 A

  However, the parent gate 31 is opened / closed by the first opening / closing means (chain) 33, and the child gate 32 is opened / closed by the second opening / closing means (chain) 34.

  Therefore, since the opening / closing means is separate from the parent gate and the child gate, two systems of opening / closing means are required, the number of parts increases, the cost increases, the structure is complicated, and the installation space is large. There is a problem of becoming.

  The present invention has been made to solve the above-described problems, and provides a parent-child flap gate capable of controlling opening and closing of a parent gate and a child gate at a predetermined timing with only one child gate opening / closing device. It is intended to do.

  In order to solve the above-mentioned problems, the present invention provides a parent gate that is supported at an upper end by a water channel and is swingable between a first lower rocking position that closes the water channel and a second upper rocking position that opens the water channel; A parent-child type having a child gate that is swingable at a third lower swing position that closes the opening of the parent gate and a fourth upper swing position that opens the opening of the parent gate, with the upper end supported by the parent gate. In the flap gate, at the upper part of the water channel, the child gate is lifted upward in the state of the fourth upper swinging position with the opening opened, and lowered downward in the state of the fourth upper swinging position with the opening opened. One possible opening / closing device is installed, and the opening / closing device opens the parent gate by swinging the child gate upward to the fourth upper swinging position. In conjunction with the pulling of the child gate upward in the state, the parent gate The water channel is opened by swinging upward to a position, and the parent gate is moved to the first downward swing in conjunction with lowering the child gate downward in the state of the fourth upward swing position by the opening / closing device. The parent and child are configured such that the water channel is closed by swinging downward to a moving position, and the opening of the parent gate is closed by swinging the child gate downward to a third lower swinging position. A type flap gate is provided.

  According to a second aspect of the present invention, a stopper portion is provided on the child gate, and this stopper portion is configured to be held against the parent gate when the child gate is swung up to the fourth upper swing position. Can do.

  According to a third aspect of the present invention, the opening / closing device includes an electric winch having a rotating drum that winds and rewinds the rope, and the child gate connected to the rope is in an upper position in a fourth upper swing position. It can be set as the structure which is pulled up and is pulled down in the state of the 4th upper rocking position.

  According to a fourth aspect of the present invention, the water channel may be provided with an upper stopper portion that holds the parent gate that is swung upward at the second upper swing position in a substantially horizontal state.

  As in claim 5, the parent gate and the child gate can be provided at the water intake of the water channel.

  According to a sixth aspect of the present invention, the parent gate and the child gate can be provided at the drainage port of the water channel.

  According to the present invention, the child gate is closed by the opening / closing device from the state where the child gate closes the opening of the parent gate at the third lower swing position and the water channel is fully closed at the first gate swing position. By swinging upward to the fourth upward swing position, the opening of the parent gate is opened, and water can be taken or drained from this opening. Then, in conjunction with pulling the child gate upward in the state of the fourth upper swing position, the main gate is swung upward to the second upper swing position, and the water channel is opened. It can be drained.

  On the other hand, the water channel is closed by the swinging down of the parent gate to the first lower swinging position in conjunction with the pulling down of the child gate in the state of the fourth upper swinging position by the opening and closing device, Since the child gate is still swung up to the fourth upper swinging position, the opening of the parent gate is opened, and water can be taken or drained from this opening. Then, by swinging the child gate downward to the third downward swing position, the opening of the parent gate is closed and the water channel is fully closed.

  In this manner, since the parent gate and the child gate can be controlled to open / close at a predetermined timing with only one child gate opening / closing device, the components are compared with the two systems of opening / closing means as in Patent Document 1. The cost is reduced and the structure is simple and the installation space is reduced.

  According to the second aspect, the stopper portion is stopped against the parent gate in the state where the child gate is swung up to the fourth upper swing position. The gate can be swung up to the second upper swing position, and the parent gate can be swung down to the first lower swing position in conjunction with lowering the child gate downward. Thus, the opening and closing of the parent gate and the child gate can be controlled at a predetermined timing with a simple configuration in which the stopper portion is provided on the child gate. Further, the child gate having the stopper portion has a shorter opening / closing time of the child gate than the child gate having no stopper portion, and the electric motor or the like can be downsized.

  According to claim 3, by winding the rope connected to the child gate with the rotating drum of the electric winch, the child gate is swung up to the fourth upper swinging position to open the opening of the parent gate, Then, in conjunction with the child gate being pulled upward, the parent gate is swung upward to the second upper swing position. In addition, simply by unwinding the rope connected to the child gate from the rotating drum of the electric winch, the parent gate swings in the first lower swing in conjunction with the child gate being pulled down in the state of the fourth upper swing position. Then, the child gate is swung downward to the third lower swinging position.

  Therefore, since it is only necessary to control the winding and rewinding timing of the rotating drum of one electric winch, the control device for automatically opening and closing the parent gate and the child gate can be simplified.

  If the electric winch brake is set to be released during a power failure, the parent gate swings down to the first lower swing position while rewinding the rope with its own weight, and then closes the water channel. The child gate can be swung down to the third lower swinging position to close the opening while rewinding the rope by its own weight.

  According to the fourth aspect of the invention, since the upper stopper portion is provided in the water channel to stop the parent gate that swings upward at the second upward swing position in a substantially horizontal state, the parent gate is stopped by the upper stopper portion. Since the parent gate does not vibrate due to the water flow, abnormal vibration force is not transmitted to the switchgear (for example, a rope), and the durability of the switchgear is improved.

  According to claim 5, when the water channel is a water intake channel for a power generation facility, for example, when the water channel is urgently closed due to a tsunami, the parent gate is swung down to the first lower rocking position to When closed, the child gate keeps the opening of the parent gate open, so that only the cooling water of the auxiliary equipment of the power generation facility can be secured at a minimum. Further, after closing the parent gate, the opening of the parent gate can also be closed by swinging the child gate downward to the second lower swing position as necessary.

  In addition, when the water channel is a river or an irrigation channel, when the parent gate is swung down to the first lower swing position and the water channel is closed, the child gate keeps the opening of the parent gate open. A maintenance discharge flow rate can be secured.

  Furthermore, the opening of the parent gate can be opened first by swinging the child gate up to the fourth upper swing position from the state where the water channel is fully closed at the first lower swing position. The child gate can be used as a charging gate. That is, if the water is charged from the opening of the parent gate until there is no difference in the water level between the upstream side and the downstream side of the parent gate, the opening / closing load of the parent gate becomes only its own weight, and the hydraulic load can be reduced.

  According to the sixth aspect, since both the parent and the child are flap gates, the child gate is opened first at a low water level and the parent gate is opened at a high water level, so that drainage can be performed without power.

It is side surface sectional drawing of the parent-child type flap gate of this invention. (A) is a top view of FIG. 1, (b) is a front view of FIG. It is side surface sectional drawing of the parent-child type flap gate of this invention provided with the rope slack detection apparatus. (A) is a top view of FIG. 3, (b) is sectional drawing of a rope slack detection apparatus. It is sectional drawing of the parent-child type flap gate of patent document 1. FIG.

  Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the drawings. 1 is a side sectional view of the parent-child flap gate 2, FIG. 2 (a) is a plan view of FIG. 1, and FIG. 1 (b) is a front view of FIG.

  A water channel 1 for water intake (or drainage) formed in a square cylinder shape with a concrete wall is provided. The intake water flow (see arrow a) is assumed to flow from the left side to the right side in FIG. WL is the maximum water level.

  The parent-child flap gate 2 includes a parent gate 3 that opens and closes the water channel 1 and a child gate 4 that opens and closes two left and right openings 3 a formed in the parent gate 3. The opening 3a and the child gate 4 do not have to be two places, and may be one place or three places or more.

  The parent gate 3 swings into a first lower swing position D1 that closes the water channel 1 and a second upper swing position U2 that opens the water channel 1 with the upper end supported on the rising wall 1a of the water channel 1 by the hinge shaft 6. It is free. The bottom wall 1b of the water channel 1 is provided with a lower stopper portion 1c that holds the parent gate 3 swinging downward to the first lower swinging position D1 in a forward inclined state. Further, an upper stopper portion 1e is provided on the lower surface of the upper wall 1d of the water channel 1 to hold the parent gate 3 swinging upward at the second upward swinging position U2 in a substantially horizontal state.

  The child gate 4 is supported by a hinge shaft 7 at the upper end on the upstream side surface of the parent gate 3, and a fourth lower swing position D 3 that closes the opening 3 a of the parent gate 3 and a fourth upper that opens the opening 3 a of the parent gate 3. It is swingable to a swing position U4.

  Each of the parent gate 3 and the child gate 4 is set to a weight that swings downward to the first and third lower swing positions D1, D3 by its own weight.

  A stopper portion 4a bent in a substantially L shape is formed at the rear end of the child gate 4. The stopper portion 4a is a substantially horizontal fourth upper swing position U4 that opens the opening 3a of the parent gate 3. It is held against the gate 3 (see the two-dot chain line).

Here, referring to FIG. 1, let the self-weight moment of the parent gate 3 be WL. Further, when the fourth upper swing position of the child gate 4 without the stopper portion is set to the position c with respect to the fourth upper swing position U4 of the child gate 4 with the stopper portion 4a, the lifting moment is L ₁ > L ₂ become.

Since WL = P ₁ L ₁ = P ₂ L ₂ , the child gate 4 with the stopper portion 4a has a shorter winding stroke of the rope 15 than the child gate 4 without the stopper portion 4a, and the winding load P ₁ becomes smaller. For this reason, the opening and closing time of the child gate 4 is short, and the electric motor 13 (described later) can be downsized.

  On the upper surface of the upper wall 1d of the water channel 1, an electric winch 12, which is a child gate opening / closing device, is installed. The electric winch 12 includes an electric motor 13, a speed reducer 14, and a rotating drum 16 that winds and unwinds the left and right ropes 15. One end of each rope 15 is associated with the lower end of each child gate 4. The other end is locked to the rotating drum 16. The electric winch 12 is provided with a brake unit 20 incorporating a brake and a clutch for lowering the weight of the parent gate 3 and the child gate 4.

  In the case of the parent-child flap gate 2 as described above, as shown by the solid line in FIG. 1, the child gate 4 closes the opening 3a of the parent gate 3 at the third lower swing position D3, and the parent gate 3 moves to the first lower swing. It is assumed that the water channel 1 is fully closed at the moving position D1.

  From this state, when the rope 15 is wound by the winding rotation of the rotary drum 16, the child gate 4 is swung upward to the fourth upper swinging position U4 to open the opening 3a of the parent gate 3. Water can be taken (or drained) from this opening 3a.

  Subsequently, when the rope 15 is wound up, the stopper portion 4a of the child gate 4 is held against the parent gate 3 so that the child gate 4 is in the state of the fourth upper swinging position U4 with the opening 3a opened. Pulled upward.

  In conjunction with this, the parent gate 3 is swung upward to the second upper swinging position U2, so that the water channel 1 is opened and water can be taken (or drained) from the water channel 1.

  When the rope 15 is rewound by the rewinding rotation of the rotary drum 16 from this state, the child gate 4 is first lowered downward in the state of the fourth upper swing position U4 where the opening of the parent gate 3 is opened. In conjunction with this, the parent gate 3 is swung downward to the first lower swinging position D1 that closes the water channel 1.

  At the first lower swing position D1 where the parent gate 3 closes the water channel 1, the child gate 4 is in the fourth upper swing position U4 where the opening 3a of the parent gate 3 is opened. Water can be taken (or drained).

  In this state, when the rope 15 is further rewound, the child gate 4 is swung downward to the third lower swinging position D3 to close the opening 3a of the parent gate 3. Thereby, the waterway 1 comes to be fully closed.

  In this way, since the parent gate 3 and the child gate 4 can be controlled to be opened and closed at a predetermined timing with only one child gate opening / closing device (such as the electric winch 12), two systems as in Patent Document 1 are provided. Compared with the opening / closing means, the number of parts is reduced, the cost is reduced, the structure is simple, and the installation space is also reduced.

  Further, when the child gate 4 is swung up to the fourth upper swinging position U4, the stopper portion 4a is stopped against the parent gate 3, so that the parent gate 4 is pulled upward, The gate 3 can be swung up to the second upper swing position U2, and the parent gate 3 can be swung down to the first lower swing position D1 in conjunction with lowering the child gate 4 downward. it can. As described above, the parent gate 3 and the child gate 4 can be controlled to be opened / closed at a predetermined timing only by a simple configuration in which the child gate 4 is provided with the stopper portion 4a.

  Further, the rope 15 connected to the child gate 4 is wound up by the rotating drum 16 of the electric winch 12 so that the child gate 4 is swung up to the fourth upper swinging position U4, so that the opening 3a of the parent gate 3 is opened. The main gate 3 is swung upward to the second upper swinging position U2 in conjunction with the opening and then the child gate 4 being pulled upward. In addition, simply by rewinding the rope 15 connected to the child gate 4 from the rotating drum 16 of the electric winch 12, the child gate 4 is pulled downward in the state of the fourth upper swinging position U4, and the parent gate is interlocked. 3 is swung down to the first lower swinging position U1, and then the child gate 4 is swung down to the third lower swinging position D3.

  Therefore, since only the winding and rewinding timing of the rotating drum 16 of one electric winch 12 need be controlled, the control device for automatically opening and closing the parent gate 3 and the child gate 4 can be simplified.

  If the brake of the electric winch 12 is set to be released by the brake unit 20 at the time of a power failure, the parent gate 3 swings downward to the first lower swing position D1 while rewinding the rope 15 with its own weight. Then, the water channel 1 can be closed, and then the child gate 4 can swing downward to the third lower swing position D3 and close the opening 3a while rewinding the rope 15 by its own weight.

  Further, since an upper stopper portion 1e is provided on the lower surface of the upper wall 1d of the water channel 1 to hold the parent gate 3 swinging upward at the second upper swinging position U2 in a substantially horizontal state, the parent gate 3 is fixed to the upper stopper. If it is held in the state of being stopped by the portion 1e, the parent gate 3 will not vibrate due to the water flow, so that abnormal vibration force will not be transmitted to the rope 15 and the durability of the rope (opening / closing device) will be improved. Become.

  On the other hand, when the water channel 1 is a water intake channel of the power generation facility, for example, when the water channel 1 is urgently closed due to a tsunami, the parent gate 3 is swung down to the first lower rocking position D1 and the water channel 1 is moved. When closed, the child gate 4 keeps the opening 3a of the parent gate 3 open, so that only the cooling water of the auxiliary equipment of the power generation facility can be secured at a minimum. Further, after closing the parent gate 3, the opening 3a of the parent gate 3 can also be closed by swinging the child gate 4 downward to the third lower swing position D3 as necessary.

  Further, when the water channel 1 is a river or an irrigation channel, the child gate 4 opens the opening 3a of the parent gate 3 when the parent gate 3 is swung down to the first lower rocking position D1 and the water channel 1 is closed. Therefore, the maintenance discharge flow rate of the water channel 1 can be ensured.

  Further, from the state where the main gate 3 is in the first lower swing position D1 and the water channel 1 is fully closed, the child gate 4 is swung up to the fourth upper swing position D4 to open the opening 3a of the parent gate 3. Since it can be opened first, the child gate 4 can be used as a water filling gate. That is, if water is charged from the opening 3a of the parent gate 3 until there is no difference in the water level between the upstream side and the downstream side of the parent gate 3, the opening / closing load of the parent gate 3 becomes only its own weight, so that the hydraulic load can be reduced. Become.

  When the water channel 1 is a drainage channel, both the parent and the child are flap gates. Therefore, if the drainage water flow (see arrow b) flows from the right side to the left side in FIG. Since the main gate 3 opens at the high water level first, drainage can be performed without power.

  As described above, when the water channel 1 is a drainage water channel, the child gate 4 and the parent gate 3 can be opened without power, but the rope 15 is loosened as the child gate 4 and the parent gate are opened and swung. Become.

  Therefore, as shown in FIGS. 3 and 4, instead of locking one end of the rope 15 to the lower end of the child gate 4, the rope 15 is U-turned upward by a sheave (pulley) 22 at the lower end of the child gate 4. Then, one end thereof is connected to the rope slack detection device 23 installed on the upper surface of the upper wall 1d of the water channel 1.

  As shown in FIG. 4B, the rope slack detecting device 23 supports the spherical washer 24a of the base plate 24 by the spherical washer receiver 25 of the upper wall 1d so as to be swingable. A coil spring 27 that biases the spring case 26 in the upward movement direction is provided between the spring case 26 that can move up and down along the guide 24 b on the base plate 24 and the base plate 24. In addition, a tension bolt 28 is provided that passes through the spring case 26, the base plate 24, the spherical washer 24a, the spherical washer receiver 25, and the upper wall 1d in series.

  A nut 40 is screwed into a portion protruding from the spring case 26 at the top of the tension bolt 28, and a socket 41 at one end of the rope 15 is locked by a pin 42 at the bottom of the tension bolt 28. Further, a limit switch 43 for detecting the upward movement of the spring case 26 is provided on the base plate 24.

  The pushing force of the coil spring 27 is set to be smaller than the lifting load of the rope 15 and larger than the own weight of the rope 15. The rope 15 is adjusted by raising and lowering the tension bolt 28 by operating the nut 40.

  Normally, as shown in FIG. 4B, the tension of the rope 15 and the spring case 26 are maintained in a state of being moved down by the tension of the rope 15. When the rope 15 is loosened, the spring case 26 is moved upward by the pushing force of the coil spring 27, and the limit switch 43 is turned on by the spring case 26 moving upward, whereby the electric winch 12 is turned on and the rope 15 is wound. As you take it, the slack in the rope disappears. When the slack of the rope 15 is eliminated, the spring case 26 is moved down together with the tension bolt 28, so that the electric winch 12 is turned off when the limit switch 43 is turned off. In this way, the rope 15 can be kept in a state without slack.

  In the above-described embodiment, the electric winch 12 is used as the opening / closing device for the child gate. However, the child gate 4 may be lifted upward and lowered downward using a cylinder that supplies and discharges fluid with an electric pump.

DESCRIPTION OF SYMBOLS 1 Water channel 1a Water intake 1d Upper wall 1e Upper stopper part 2 Parent-child type flap gate 3 Parent gate 3a Opening 4 Child gate 4a Stopper part 12 Electric winch 13 Electric motor 15 Rope 16 Rotating drum D1 1st downward swing position U2 2nd top Swing position D3 Third lower swing position U4 Fourth upper swing position

Claims (6)

An upper end is supported by the water channel, and a parent gate that can swing between a first lower swing position that closes the water channel and a second upper swing position that opens the water channel, and an upper end that is supported by the parent gate, In a parent-child flap gate having a child gate swingable at a third lower swing position for closing the gate opening and a fourth upper swing position for opening the parent gate opening,
One unit capable of pulling the child gate upward in the state of the fourth upper swinging position with the opening opened and lowering the child gate downward in the state of the fourth upper swinging position with the opening opened. The switchgear of
The opening / closing device causes the child gate to swing upward to the fourth upward swing position to open the opening of the parent gate, and interlocks with pulling the child gate upward in the state of the fourth upward swing position. Then, the water channel is opened by swinging the parent gate to the second upper swing position,
The water channel is closed by the swinging down of the parent gate to the first lower swinging position in conjunction with lowering the child gate downward in the state of the fourth upper swinging position by the opening / closing device. A parent-child flap gate characterized by closing the opening of the parent gate by swinging the child gate downward to a third lower swing position.   2. The stopper according to claim 1, wherein a stopper portion is provided on the child gate, and the stopper portion is stopped against the parent gate when the child gate is swung upward to a fourth upper swing position. Parent-child flap gate.   The opening / closing device is constituted by an electric winch having a rotating drum that winds and rewinds the rope, and the child gate connected to the rope is lifted upward in a state of a fourth upper swinging position, 3. The parent-child flap gate according to claim 1 or 2, wherein the parent-child flap gate is adapted to be pulled downward in a swinging position state.   The upper stopper part which stops the said main gate swung up to the 2nd upper rocking | fluctuation position in the said water channel in the substantially horizontal state is provided. Parent-child flap gate.   The parent-child flap gate according to any one of claims 1 to 4, wherein the parent gate and the child gate are provided at a water intake of a water channel.   The parent-child flap gate according to any one of claims 1 to 4, wherein the parent gate and the child gate are provided at a drain outlet of a water channel.

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