JP4686415B2 - Rolling gate - Google Patents

Description

  The present invention relates to a relief gate.

  Conventionally, at the bottom of the water channel, there is provided a door body that is clamped to be rotatable between an upstream standing position and a downstream lying position, and a bag body that is installed on the downstream side of the door body. In addition, there is a undulation gate in which the door body is rotated in the upright direction due to the expansion of the bag body due to the supply of air, and the door body is rotated in the inclining direction due to the contraction of the bag body due to the discharge of air ( Patent Document 1).

In the undulation gate as described above, there is a case where the door body is used at an intermediate opening (a position between the standing position and the lying position) for adjusting the flow rate of the water channel. At this intermediate opening, the height of the door body (weir height) is balanced between the weight of the door body and the external force (hereinafter simply referred to as external force) such as water pressure and earth pressure acting on the door body and the supporting force of the bag body. ) Will be determined.
JP 2002-309547 A

  However, in places where uneven flow or the like occurs in the water channel or the water channel is bent, the external force is different on both sides of the water channel, so if the supporting force of the bag body is constant, the door body on the side where the external force is higher As one end side of the door bends to the downstream side, the height (weir height) of the one end side of the door body is lower than the other end side, and the weir height changes on both banks, so the flow rate adjustment of the water channel is accurate In addition, the problem was that the landscape was unsightly and encouraged scouring of the downstream riverbed due to significant drift.

  The present invention has been made to solve the above problems, and by preventing the weir height from changing on both sides of the water channel, the flow rate of the water channel can be adjusted accurately and the unsightly appearance is eliminated. An object of the present invention is to provide a relief gate that can reduce scouring of the downstream riverbed.

In order to solve the above problems, the present invention provides a door body clamped to be rotatable between an upstream standing position and a downstream lying position at the bottom of a water channel, and on the downstream side of the door body. And the door body is rotated in the upright direction by the expansion of the bag body due to the supply of air, and the door body is rotated in the lying down direction by the contraction of the bag body due to the discharge of air. In the undulation gate, the bag body is divided into two in the lateral width direction of the door body, and is arranged on both ends of the door body, and an air supply / exhaust pipe is connected to each bag body. In addition, the present invention provides a undulation gate characterized in that control means for supplying and exhausting air is provided for each bag body.

  It is preferable that the inclinometer which each detects the inclination angle of the both ends of a door body is provided in the both ends side of the said door body like Claim 2.

  According to the present invention, if one side of the door body on the side with high external force bends to the downstream side by controlling the air supply / exhaust control of the bag body on both ends of the door body by the control means for each bag body. As a result of supplying more air to the bag body on this side and increasing the supporting force of the bag body, the one end side of the door body will not bend, so that the weir height will not change on both sides of the waterway ( The weir height can be adjusted), and the flow rate can be adjusted accurately.

  In addition, since the weir height does not change on both sides of the waterway, the unsightly landscape is eliminated and scouring of the downstream riverbed can be reduced.

  As described in claim 2, by detecting the inclination angles of the both ends of the door with an inclinometer, it is possible to automatically perform air supply / exhaust control by remote control so that the inclination angles are substantially the same. Therefore, the flow rate of the water channel can always be adjusted accurately.

  Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the drawings.

  As shown in FIGS. 1 and 2, the undulating gate 2 provided so as to cross the river or the water channel 1 is a bottom 1 a of the water channel 1, and rotates between an upstream standing position U and a downstream lying position D. The door body 3 clamped movably and the bag bodies 4A and 4B installed on the downstream side of the door body 3 are provided, and the door body 3 stands up by the expansion of the bag bodies 4A and 4B due to the supply of air. The door body 3 is rotated in the lying down direction by contraction of the bag bodies 4A and 4B due to the discharge of air.

  The steel door 3 is formed in a horizontally long rectangular shape, and its lower end is clamped to the bottom 1a of the water channel 1 by a hinge member 6 so as to be rotatable, and a space between the upper end and the bottom 1a is a chain or the like. Connected by the flexible connecting member 7, the upper limit of the standing position U of the door body 3 is regulated by the connecting member 7.

  In this embodiment, the rubber bag bodies 4A and 4B are divided into two in the width direction of the door body 3 and are arranged on both ends of the door body 3, respectively, but may be divided into three or more parts. In short, it is sufficient that at least one bag is arranged on each side of the door 3.

  Each bag 4A, 4B is formed in a horizontally long pillow shape, and its lower part is fixed to the bottom 1a, so that it expands upward and contracts downward.

  Air supply / exhaust pipes 8A and 8B are connected to the bag bodies 4A and 4B via the compressor 12, the compressed air tank 13 and the electromagnetic switching valves 14A and 14B, respectively. By switching the electromagnetic switching valves 14A and 14B, Air is individually supplied to the bag bodies 4A and 4B, and air is individually exhausted from the bag bodies 4A and 4B.

  Inclinometers (opening gauges) 16A and 16B for detecting the inclination angles of both ends of the door body 3 are provided on both ends of the door body 3, and electromagnetic switching is performed by detection signals of the inclinometers 16A and 16B. A control circuit 17 for switching and controlling the valves 14A and 14B is provided. The control circuit 17 and the electromagnetic switching valves 14A and 14B constitute control means for controlling air supply / exhaust for each of the bags 4A and 4B.

  If the raising / lowering gate 2 is configured as described above, normally, the door body 3 is lowered from the standing position U by controlling the air supply / exhaust to the bag bodies 4A and 4B at both ends of the door body 3 in equal amounts. Rotate to position D.

  When the door body 3 is used at an intermediate opening (see the symbol N in FIG. 2) for adjusting the flow rate of the water channel 1, the external force should be the same on both banks of the water channel 1 as shown in FIG. In this case, both ends 3a and 3b of the door 3 of the hoisting gate 2 are not bent, so that the height (weir height) of the door 3 is determined (see weir height H1).

  On the other hand, in locations where drift or the like occurs in the water channel 1 or the water channel 1 is bent, the external force differs between the two banks of the water channel 1, so that the supporting force (supply of air) of the bags 4A and 4B If the amount is constant, one end of the door 3 on the side with high external force (the right end 3a in FIG. 3) bends to the downstream side, so one end of the door The height (weir height) on the 3a side is lower than the other end 3b side (see weir height H2). As a result, the weir heights H1 and H2 change on both banks, so that the flow rate of the water channel 1 cannot be adjusted accurately.

  Therefore, as shown in FIG. 1, air supply / exhaust control is performed on the bag bodies 4A and 4B on the both end portions 3a and 3b side of the door body 3 by switching the electromagnetic switching valves 14A and 14B for the bag bodies 4A and 4B. Thus, if the one end portion 3a side of the door body 3 on the side where the external force is high comes to bend to the downstream side, by supplying more air to the bag body 4A on this side and increasing the supporting force of the bag body 4A, the door As a result of the one end 3a side of the body 3 not being bent, the weir height H1 does not change on both banks of the water channel 1 (weir height synchronization), and the flow rate of the water channel can be adjusted accurately.

  In particular, the inclination angles of the both end portions 3a and 3b of the door body 3 are detected by the inclinometers 16A and 16B, and the control circuit 17 controls the switching of the electromagnetic switching valves 14A and 14B based on the detection signals. Since the air supply / exhaust control can be automatically performed by remote operation so that the flow rate is substantially the same, the flow rate of the water channel can always be adjusted accurately.

  Moreover, since the weir height H1 does not change in both banks of the water channel 1, the unsightly appearance is eliminated and the scouring of the downstream riverbed can be reduced.

  Further, when the door body 3 is biased by bending the both end portions 3a and 3b sides of the door body 3, the end portions 5a of the door body 3 are placed on the side doors 4a and 4b of the water channel 1 as shown in FIG. , 5b come into contact with each other, and the door body 3 is rubbed to cause scratches. And when the abrasion of 4a, 4b per side door grows irregularly, the resistance with respect to rotation of the door body 3 increases, and the raising / lowering function of the door body 3 may be hindered. On the other hand, in this embodiment, since the bias of the door body 3 can be prevented, the contact between the end portions 5a and 5b of the door body 3 and the side doors 4a and 4b of the water channel 1 can be avoided.

It is the front view which looked at the relief gate which concerns on embodiment of this invention from the downstream. It is side surface sectional drawing of the relief gate of FIG. It is the front view which looked at the door body of the middle opening degree from the downstream.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Waterway 1a Bottom part 2 Relief gate 3 Door body 4A, 4B Bag body 8A, 8B Supply / exhaust pipe 14A, 14B Electromagnetic switching valve 16A, 16B Inclinometer 17 Control circuit U Standing position D Lodging position N Intermediate opening

Claims (2)

At the bottom of the water channel, there is provided a door body that is clamped so as to be rotatable between an upstream standing position and a downstream lying position, and a bag body that is installed on the downstream side of the door body. In the hoisting gate in which the door body is rotated in the standing direction due to the expansion of the bag body due to the supply of, and the door body is rotated in the lying down direction due to the shrinkage of the bag body due to the discharge of air,
The bag body is divided into two in the lateral width direction of the door body, and is disposed on both ends of the door body. Air supply / exhaust pipes are connected to each bag body, and air is supplied to each bag body. An undulating gate, characterized in that a control means for controlling exhaust is provided.   The undulation gate according to claim 1, wherein inclinometers are provided on both ends of the door body to detect inclination angles of both ends of the door body.

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