JP2007186959A - Pump gate - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pump gate which detects the trouble of a submerged pump and detects the pinching of foreign matter to a flap valve by detecting the closing state of the flap valve during drainage. <P>SOLUTION: The submerged pump (14) which is detachably attached to the flap valve (9) is connected with a flap gate (7) incorporated in a gate door body (5) of a pump gate (3). An opening and closing detection device (10) is arranged in the gate door body (5), and a detection arm (11) is fixed to the flap valve (9) and brought into contact with the opening and closing detection device (10). An abnormality of the submerged pump (14) during operation is detected by the flap valve (9), so that the inspection and repair of the submerged pump (14) can be carried out in an emergency and the pinching of forein matters of the flap valve is detected. The opening and closing detection device (10) mounted at the gate door body (5) is easily replaced when a trouble occurs. The opening and closing detection device (10) is arranged in the gate door body (5) separated from the flow of a river, so that the opening and closing detection device (10) is not affected by floating matters in flowing water. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a pump gate for irrigation or drainage sluice on a river or the like to control river or forcible drainage, and more specifically, detects a closed state of a flap valve during drainage, The present invention relates to a pump gate that detects abnormalities and trapping of foreign matter into a flap valve.

  2. Description of the Related Art Conventionally, a pump gate that is provided with a submersible pump on a freely movable gate door body and performs forced drainage in a closed state is well known. A vertical shaft or horizontal shaft type submersible pump is used as the pump gate, and a device in which a flap valve is arranged on the horizontal shaft type submersible pump in order to prevent a back flow of water from the discharge side to the water intake side, For example, as described in Patent Document 1, the applicant of the present invention has proposed. In addition, a flap valve is connected to the outer cylinder of the pump body, a distance sensor is arranged at the outer peripheral end of the outer cylinder, the distance on the sensor axis from the tip of the distance sensor to the inner surface of the flap valve is measured, and the flap valve A gate pump that detects opening and closing abnormalities due to the biting of foreign matter is also known, for example, as described in Patent Document 2.

Utility Model Registration No. 2583875 (Claim 1, FIG. 2) JP 2004-11606 (paragraph numbers 0022 to 0024, FIG. 1)

  A pump gate equipped with a flap valve on the outer cylinder of a conventional submersible pump can prevent backflow from the discharge side. Water flows in from the side. When this reverse flow phenomenon occurs, flooding in the upstream region or salt damage in the upstream region occurs if the downstream region is seawater. And the pump gate which arranged the distance sensor in the outer cylinder of the pump body can detect the open / close state of the flap valve and detect the breakdown of the submersible pump, the trapping of the falling valve of the flap valve, etc. Since the distance sensor is located inside the pump gate mounting portion of the gate door body, it is difficult for a failure due to external factors to occur. However, if the failure occurs due to the amount of water in the water channel, repair restrictions increase. There are problems such as accuracy due to condensation of the position detector, which increases costs such as maintenance over time. In the case of inspection and failure of the submersible pump, it is necessary to restore it by pulling up the gate door, but in the case of a submersible pump with a flap valve attached, the submersible pump of the gate door is attached when the water channel is closed or forced drainage is performed. Because the outside water flows back from the section, urgent repairs were impossible. The present invention provides a pump gate that enables easy inspection and repair of an underwater pump in an emergency by detecting the abnormalities of the submersible pump during operation and the trapping of a foreign object in the flap valve by simply exchanging the open / close detection device. To do.

  In order to achieve the above object, a submersible pump is installed in a vertically movable gate door body, and in a pump gate that performs forced drainage with the water channel closed, a flap valve can be attached to and detached from the flap gate incorporated in the gate door body. A submersible pump is connected, and a flap valve open / close detector is installed on the gate door body. It can detect the opening and closing of the flap valve during operation to detect abnormalities in the submersible pump, and check the submersible pump in an emergency. Repair is possible. In addition, it is possible to detect a back flow when the submersible pump is stopped due to foreign matter caught in the flap valve. The flap valve open / close detection device consists of a proximity switch that is arranged at the drain of the gate door body. The detection arm is fixed to the flap valve and the flap valve closed position detection arm is set to the proximity switch. The proximity switch installed on the gate door body can be easily replaced at the time of failure. Moreover, since the arrangement location is arranged on the gate door body isolated from the discharge of the river, it is not affected by floating foreign substances in the discharge water.

  Since the present invention is configured as described above, it is easy to check and replace the open / close detection device, and it is possible to detect abnormalities of the submersible pump during operation. When the submersible pump breaks down, the gate door is temporarily raised, the submersible pump is removed from the flap gate, and the gate door is lowered, and the flap valve built into the gate door closes the water channel. In addition, inspection and repair are possible without backflow of outside water. It can also be installed in existing pump gates or gates with built-in flap valves.

  An embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a conceptual diagram of a pump gate installed in a river or the like, and a pump gate 3 is disposed between an inflow water channel 1 and a drain channel 2. A gate door body 5 is suspended from a rack bar 4 suspended from the top wall of the pump gate 3, and the gate door body 5 can be raised and lowered by an electric rack opening / closing device 6 disposed on the rack bar 4. FIG. 2 is a longitudinal sectional view of a gate door body incorporating a flap gate. The flap gate 7 is inserted into the drain port 5a of the gate door body 5, and the inflow side flange portion 7a is connected to the gate door body 5. The flap gate 7 is incorporated in the gate door body 5. A rotation support shaft 8 pivotally attached to the flap valve 9 is pivotally supported on the upper outer periphery of the flap gate 7 on the drain side. When the submersible pump 14 is stopped, the backflow from the drainage channel 2 to the inflow channel 1 is prevented when the inner water level L of the inflow channel 1 becomes lower than the outer water level H of the drainage channel 2.

  FIG. 3 shows an open / close detection device for a flap valve disposed on a gate door body. An open / close detection device 10 for a flap valve 9 is disposed on a gate door body 5 incorporating a flap gate 7. The detection arm 11 is fixed to the rotation support shaft 8 of the flap valve 9, and the detection arm 11 is also rotated as the flap valve 9 is opened and closed. The open / close detection device 10 is configured by a proximity switch 12 disposed above the drain outlet 5a of the gate door body 5, and the proximity switch 12 is brought into contact with the flap valve 9 when the flap gate 7 is closed. It is. Since the location of the proximity switch 12 is disposed on the gate door 5 isolated from the river discharge, it is not affected by floating foreign substances in the running water. Since the proximity switch 12 is installed in the gate door body 5, replacement at the time of failure becomes easy. When the flap valve 9 rotates and the flap gate 7 is opened, the detection arm 11 is moved away from the proximity switch 12. Reference numeral 13 denotes a mounting seat for the proximity switch 12 hung above the drain port 5 a of the flap gate 7.

  FIG. 4 is a longitudinal sectional view of a gate door body provided with a submersible pump. A horizontal axis submersible pump 14 is detachably connected to an inflow water channel 1 side of a flap gate 7 incorporated in the gate door body 5. Yes, the flap valve 9 is opened with the discharged water of the submersible pump 14, and the water in the inflow water channel 1 is discharged to the drainage channel 2. If the flap valve 9 is closed when the submersible pump 14 is in operation, the closed state is detected by the proximity switch 12 and an abnormality of the submersible pump 14 is detected. When the submersible pump 14 breaks down, the gate door 5 is temporarily lifted to remove the submersible pump 14 from the flap gate 7 and the gate door 5 is lowered, so that the flap valve 9 incorporated in the gate door 5 The water channel is closed and the backflow from the drainage channel 2 to the inflow channel 1 is prevented. The submersible pump 14 can be inspected and repaired in an emergency. Also, it can be installed in existing pump gates and flap valve built-in gates, and in the maintenance management, the flap valve 9 disposed in the flap gate 7 can prevent backflow when the outside water level H is higher than the inside water level L. Yes. Reference numeral 15 denotes a power cable for the submersible pump 14.

  The pump gate according to the present invention is a submersible pump connected to a flap gate incorporated in a gate door body, and a flap valve open / close detection device is arranged on the gate door body. By detecting this, it is possible to check and repair the submersible pump in an emergency. And the proximity switch installed in the gate door body can also be easily replaced at the time of failure. Therefore, it is suitable for a pump gate for controlling water or forcibly draining a river or the like, and can also be installed on an existing pump gate or a gate with a built-in flap valve.

It is a conceptual diagram of the pump gate which concerns on this invention. Similarly, it is a longitudinal sectional view of a gate door body incorporating a flap gate. Similarly, it is an enlarged view of a pump gate. Similarly, it is a longitudinal cross-sectional view of a gate door body provided with a submersible pump.

Explanation of symbols

DESCRIPTION OF SYMBOLS 5 Gate door body 5a Drain port 7 Flap gate 9 Flap valve 10 Opening / closing detection apparatus 11 Detection arm 12 Proximity switch 14 Submersible pump

Claims (2)

  A submersible pump (14) is disposed in a gate door body (5) that can be moved up and down, and in a pump gate that performs forced drainage with the water channel closed, a flap valve is attached to a flap gate (7) incorporated in the gate door body (5). A pump gate characterized in that (9) and a removable submersible pump (14) are connected, and an opening / closing detection device (10) for the flap valve (7) is arranged on the gate door body (5).   The open / close detection device (10) is composed of a proximity switch (12) disposed in the drain port (5a) of the gate door body (5), and the detection arm (11) is fixed to the flap valve (9), 2. The pump gate according to claim 1, wherein the detection arm (11) of the closing position of the flap valve (9) is brought into contact with the proximity switch (12).

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