JP2005083111A - Flushing gate - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a flushing gate ensuring further safety against such an abnormal situation that the overturning operation of a valve element for flushing is not normally performed. <P>SOLUTION: This flushing gate is provided with the valve element 2 swingable between a rising cut-off attitude for blocking the channel and an overturned attitude for opening the channel, with a base part pivoted at the bottom part of a channel, and an attitude changeover mechanism 3 for maintaining the rising cut-off attitude by a holding part until the water level of the channel rises to the flushing execution water level and releasing the holding part 30 upon reaching the flushing execution water level to permit swinging into the overturned attitude. A forcible release mechanism 5 for forcibly releasing the hold of the rising cut-off attitude by the attitude changeover mechanism 3 comprises a storage tank 50 held in a displaceable manner to the valve element 2 to store overflow water from the valve element 2, and an operating rod 53 interlocked with the displacement of the storage tank 50 caused by the weight of the overflow water flowing into the storage tank 50, to forcibly release the holding part 30 by the attitude changeover mechanism 3. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a flush gate that periodically flushes rivers, sewage pipes, irrigation canals, and the like.

Conventionally, a flush gate is known that periodically flushes rivers, sewage pipes, irrigation channels, and the like. For example, Patent Literature 1 includes a stand-up / fall-overable weir plate whose base is pivotally attached to the bottom of a water channel, and a hoisting device installed on a dike, and is supported in an upright state by the hoisting device. The falling weir is configured to be turned over when the water level rises above a certain level, and when the water level in the water channel drops to a predetermined standing water level due to the overturning, the hoisting device is operated to rise again. The water tank is provided with a water tank into which the water from the water channel flows, and the water tank is formed with an upward opening having an area equal to or greater than the cross-sectional area of the water tank, so The weight can be increased to ensure stable and rapid lodging, and it is possible to quickly reduce the weight due to the lodging, and it is possible to quickly stand up again after water discharge and resume water storage. It has been proposed.
JP 2001-131945 A

  However, according to the technique described in Patent Document 1 described above, parts such as a hoisting device and a dam plate support wire for raising the falling dam plate again are required, and the structure is complicated, There was a problem that it could not be operated in areas and places where power supply facilities were not maintained.

  Therefore, the applicant of the present invention does not use a hoisting device that requires power such as human power or an electric motor, and automatically flushes the valve body in the standing water stop posture to perform flush cleaning, and after cleaning, the valve As a flush gate that automatically returns the body to a standing water stop posture, the base is pivotally mounted at the bottom of the water channel, and can swing between a standing water posture that closes the water channel and a falling posture that opens the water channel And maintain the standing water stop posture by the holding portion until the water level of the water channel rises to the flush execution water level, and when the flush execution water level is reached, release the holding portion and swing to the falling posture. Has been filed for a flush gate provided with a posture switching mechanism that allows the valve body in a falling position and a posture return mechanism that automatically returns the valve body in the falling posture to the standing water stop posture (Japanese Patent Application No. 2003-098432). From the standpoint of ensuring further safety in case the posture switching mechanism does not operate for some reason, including the rush gate, to stop the posture return mechanism from operating in an emergency and to maintain the falling posture, etc. There was room for further improvement in terms of

  An object of the present invention is to provide a flash gate that ensures further safety in preparation for an abnormal situation in which the overturning operation of a valve body for flush cleaning is not normally performed in view of the above-described conventional drawbacks. It is in.

  In order to achieve the above-mentioned object, the first feature of the flash gate according to the present invention is that the base is pivotally attached to the bottom of the water channel as described in claim 1 of the claims, and the water channel is closed. And maintaining the standing water stop posture by a holding unit until the water level of the water channel rises to the flush execution water level, and a valve body swingable between a standing water stop posture and a falling posture that opens the water channel, When the flush execution water level is reached, the flush gate is provided with a posture switching mechanism that releases the holding portion and allows swinging to the falling posture, forcibly holding the standing water stop posture by the posture switching mechanism. It is in the point provided with the forced release mechanism which cancels.

  According to the above configuration, even if the valve body is held in the standing water posture for some reason and rises above the flush execution water level, before reaching an unexpected situation such as flooding of the pipeline or damage to the equipment, Since the standing water stop posture is forcibly released by the forcible release mechanism, higher safety can be secured.

  In the second feature configuration, as described in claim 2, in addition to the first feature configuration described above, the forcible release mechanism is held movably by the valve body to allow overflow water from the valve body to flow. The storage tank is configured to include an action rod that forcibly releases the holding portion by the posture switching mechanism in conjunction with the displacement of the water storage tank due to the weight of the overflow water flowing into the water storage tank.

  In this case, the water that has risen from the flush execution water level and overflowed from the valve body flows into the water tank, so that the relative position of the water tank to the valve body fluctuates, and the displacement energy is transferred to the holding portion via the action rod. The standing standing water posture is forcibly released.

  According to the third feature configuration, in addition to the first feature configuration described above, in addition to the first feature configuration described above, the holding portion that maintains the standing water-stopping posture is a first made up of a locking claw and an engagement hole. The locking mechanism is configured by separating and arranging the valve body and the horizontal beam portion provided in the gate portion, and the forcible release mechanism is configured by a second locking mechanism capable of releasing the connection between the horizontal beam portion and the gate portion. It is in a certain point.

  According to the above-described configuration, the holding portion is configured by releasing the engagement between the second locking portion and releasing the connection between the cross beam portion and the gate portion, that is, by removing the cross beam portion from the gate portion. Since the engagement state by the first locking mechanism is canceled, the held standing water stopping posture is forcibly released.

  In the fourth feature configuration, in addition to any one of the first to third feature configurations described above, the valve body in a fallen posture is automatically returned to the standing water stop posture as described in claim 4. The posture returning mechanism is provided in the valve body, and the flush cleaning can be continuously repeated by configuring in this way.

  In the fifth feature configuration, in addition to the fourth feature configuration described above, in addition to the fourth feature configuration described above, the fall posture maintenance that forcibly stops the return operation to the standing water stop posture by the posture return mechanism is provided. The mechanism is provided, so that, for example, when the flush cleaning is not performed normally when the return to the standing water stopping posture is incomplete, the falling posture is surely maintained, and the further situation This makes it possible to avoid the deterioration.

  In the sixth feature configuration, as described in claim 6, in addition to the fifth feature configuration described above, the posture return mechanism is disposed around the pivot axis of the valve body, and the valve body is It is composed of a spring that constantly urges in the standing direction, and the fall posture maintaining mechanism is composed of a urging release mechanism that releases the urging force of the spring. The return urging force against the valve element is no longer applied, and the falling posture is maintained.

  As described above, according to the present invention, it is possible to provide a flash gate that ensures further safety in preparation for an abnormal situation or the like in which the overturning operation of the valve body for flush cleaning is not performed normally. It became so.

  Embodiments of the flash gate according to the present invention will be described below. As shown in FIGS. 1 and 2, in the flash gate 1, the base portion 21 is pivotally attached to the shaft portion 9 around the shaft center P <b> 1 at the bottom of the water channel 8 between the pair of left and right gate pillars 7 </ b> A constituting the gate portion 7. A standing water stopping posture (shown by a solid line in FIG. 2) for closing the water channel 8 and storing water upstream of the water channel 8, and a falling posture for opening the water channel 8 and passing water downstream (FIG. 2). And the valve body 2 that can swing between the water channel 8 and the standing water stop posture is maintained by the holding unit 30 until the water level of the water channel 8 rises to the flush execution water level HHWL. When the flush execution water level HHWL is reached, the holding unit 30 is released and the posture switching mechanism 3 that permits the swing to the fall posture and the valve body 2 in the fall posture are automatically returned to the standing water stop posture. The posture return mechanism 4 is provided.

  In the valve body 2 in the standing water stopping posture, both ends in the width direction of the upstream facing surface 22 of the water channel 8 are in watertight contact with the seal surface 7a of the gate pillar 7A, and the lower end portion of the upstream facing surface 22 is The gate portion 7 is configured to be in watertight contact with the seal surface 7b of the lower end horizontal portion 7B to prevent water from flowing out from the upstream side to the downstream side.

  The valve body 2 has a hollow 20 inside, and an opening 23 formed in the upstream facing surface 22 in the standing water stopping posture (a punching metal is installed to prevent inflow of solid foreign matter) The water in the water channel 8 flows into the cavity 20 from the opening 20 and the water in the cavity 20 flows out from the opening 24 formed on the top surface in the above-mentioned fall position. A moving passage 25 is formed.

  The posture return mechanism 4 is provided on the valve body 2 and is wound or inserted into a swing shaft 9 of the valve body 2 and is twisted and fixed so as to constantly urge the valve body 2 in a standing direction. It comprises a pair of left and right helical springs 40 and a balance weight 41 that rolls on the moving passage 25.

  The posture switching mechanism 3 is divided and installed in the gate portion 7 where the valve body 2 and the valve body 2 come into contact with each other. The float 31, the float rod 32, the engagement / disengagement mechanism 33 installed on the valve body 2 side, It is comprised by the engagement hole 34 installed in the gate part 7 side. The float 31 is accommodated in the cavity 20 so as to be movable up and down, and is connected via the float rod 31 to the engagement / disengagement mechanism 33 installed outside the upstream facing surface 22 side of the valve body 2. The engaging / disengaging mechanism 33 may be disposed inside the valve body 2.

  As shown in FIG. 3, the engagement / disengagement mechanism 33 includes a support shaft 33 </ b> A that is rotatably supported horizontally within the cavity 20 of the valve body 2, and the upstream-side facing surface 22 that protrudes in a watertight manner. A rotating plate 33B having a base fixed to one end of the support shaft 33A, a pair of horizontally supported rods 33C connected to the free end of the rotating plate 33B, and attached to the tip of the rod 33C The rod 33C is reciprocated by rotating around the axis P2 in conjunction with a support shaft 33A that is configured by a lock claw portion 33D and that rotates in accordance with the vertical movement of the float 31. It is configured to allow exercise.

  The lock claw 33D is inserted into a case 33E fixed to the tip of the rod 33C via a spring 33F, and is protruded and held outside the case 33E by the urging force of the spring 33F. When the taper surface 33d interferes with the left and right gate pillars 7A of the gate portion 7 immediately before 2 returns to the standing water stopping posture, the taper surface 33d slides while being pressed into the case 33E, and returns to the standing water stopping posture. It engages with the engagement hole 34 formed in the gate pole 7A and enters a locked state. That is, the engagement / disengagement mechanism 33 serves as the holding unit 30 that maintains the standing water stopping posture.

  The float 31 rises as water flows into the cavity 20 from the opening 23 of the valve body 2 in the standing water stopping posture, and the locked state is maintained at a water level HWL lower than the flush execution water level HHWL. When the flush execution water level HHWL is reached, the engagement state by the engagement / disengagement mechanism 33 is released, and the valve body 2 starts to tilt to the falling posture.

  That is, the valve body 2 is loaded with the water pressure of the water channel 8 rising to the flush execution water level HHWL as a pressing force, and this pressing force overcomes the spring force of the helical spring 40 in the posture return mechanism 4 and falls. Tilt a little to get a posture. In this state, the pressing force, the weight of the valve body 2 and the sum of the weight of the water in the cavity 20 act to cause the overturning promoting force, so that the overturning angle θ = 90 + α degrees shown by the two-dot difference line in FIG. The waterfall 8 is rapidly turned over to open the water channel 8 downstream, and flush cleaning is performed. In this state, the balance weight 41 located at the lower part of the moving passage 25 (base side of the valve body 2) rolls to the upper part (upper end side than the top surface of the valve body 2).

  Almost simultaneously with the end of the flush cleaning, the water in the cavity 20 is drained downstream from the opening 24 on the top surface, the fall accelerating force is greatly reduced, and the return spring 4 of the posture return mechanism 4 is returned by the helical spring 40. The force becomes larger than the sum of the weight of the balance weight 41 moved to the tip end side of the tilted valve body 2 and the weight of the valve body, and the power is rotated in the standing direction to return.

  The return urging force by the helical spring 40 gradually decreases as the valve body 2 returns from the falling posture to the standing water stopping posture, but the balance weight 41 moves to the base side as the posture changes, and the center of gravity of the valve body 2 Is reduced to compensate for the return biasing force, and the valve body 2 is rapidly returned to the standing water stopping posture. In this state, the engagement / disengagement mechanism 33 is engaged to maintain the standing water stopping posture.

  In addition, in the above-described flush gate 1, in the case where the posture switching from the standing water stopping posture to the overturning posture is not activated for some reason by the posture switching mechanism 3 described above, the standing water stopping posture is maintained by the posture switching mechanism. Is forcibly released. The forced release mechanism 5 includes a water storage tank 50 that is held by the valve body 2 so as to be displaceable and stores overflow water from the valve body 2, and a weight of the water storage tank 50 that depends on the weight of overflow water that has flowed into the water storage tank 50. In conjunction with the displacement, an action rod 53 for forcibly releasing the holding unit 30 by the posture switching mechanism 3 is provided.

  As shown in FIGS. 1A and 2, the water storage tank 50 is arranged along the downstream facing surface 26 of the valve body 2 so that water overflowing the valve body 2 from the upper opening is stored. While being held slidably in the vertical direction, the bottom 51 is supported by an elastic member 52 such as a spring, and when a predetermined volume of overflow water is stored, the bottom weight resists the supporting force of the elastic member 52 by its own weight. Move to. A pair of left and right working rods 53 are provided from the back side of the water storage tank 50 facing the downstream side facing surface 26 so as to penetrate from the downstream side facing surface 26 of the valve body 2 to the upstream side facing surface 22 through a watertight mechanism, As the water tank 50 moves up and down, the working rod 53 moves in conjunction with the vertical direction.

  As shown in FIG. 4, the distal end portion of the working rod 53 is formed in a sickle-shaped working portion 54, and a tapered edge formed in the working portion 54 as the working rod 53 moves downward. When the portion 54a presses the tapered surface 33d of the lock claw portion 33D from above, the lock claw portion 33D is retracted and urged into the case 33E, and thus the engagement hole 34 formed in the gate post 7A. The engagement state of the holding portion 30 that is engaged with and maintained in the locked state is canceled.

  Further, the above-described flush gate 1 is provided with a falling posture maintaining mechanism 6 that forcibly stops the returning operation to the standing water stopping posture by the posture returning mechanism 4 to release the urging force of the helical spring 40. The force release mechanism is used. More specifically, as shown in FIGS. 1B and 2, the end portion on the center side of the helical spring 40 is fixed to the base portion 21 and the other end portion is below the left and right portal posts 7A. The valve body 2 is twisted and fixed to each provided ratchet gear 60 so as to urge the valve body 2 in the standing direction. A ratchet pin 61 for preventing the rotation of the ratchet gear 60 is provided so as to be able to swing around a swing shaft 62, and the valve body 2 in the falling position is stopped by the return biasing force of the helical spring 40. It is configured to return to a water posture. Here, by pulling the operating wire 63 provided at the other end of the ratchet pin 61, the ratchet pin 61 is detached from the ratchet gear 60, and the ratchet gear 60 idles, whereby the return biasing force. Does not act, and the fall posture of the valve body 2 in the fall posture is maintained. That is, the urging release mechanism is configured by the ratchet gear 60, the ratchet pin 61, and the operation wire 63.

  In the embodiment described above, the engagement / disengagement mechanism 33 is described as being installed outside the upstream facing surface 22 side of the valve body 2. However, the engagement / disengagement mechanism 33 is disposed inside the valve body 2. In this case, the working rod 53 of the forcible release mechanism 5 presses the lock claw 33D protruding from the side of the valve body 2 from above as shown in FIG. May be arranged as follows.

  In the above-described embodiment, the description has been given of the one provided with the posture returning mechanism that automatically returns to the standing water stopping posture. However, when the forcible release mechanism is provided, it is not always necessary to provide the mechanism, and an external device such as an electric motor may be provided. It may be restored using energy. Similarly, a device provided with a falling posture maintaining mechanism does not necessarily need to include a forced release mechanism.

  Hereinafter, another embodiment of a forcible release mechanism that forcibly releases the holding of the standing still water posture by the posture switching mechanism will be described. In addition, the same part as the above-mentioned embodiment is demonstrated using the same code | symbol. As shown in FIGS. 6 to 8, the flash gate 1 is pivotally mounted around the axis P <b> 1 around the shaft portion 9 at the bottom of the water channel 8 between the pair of left and right gate pillars 7 </ b> A constituting the gate portion 7. A valve body 2 that is swingable between a standing still water posture that closes the water channel 8 and stores water upstream of the water channel 8 and a falling posture that opens the water channel 8 and passes water downstream is disposed. Configured. The posture return mechanism 4 is provided on the valve body 2 and is wound or inserted into a swing shaft 9 of the valve body 2 and is twisted and fixed so as to constantly urge the valve body 2 in a standing direction. It is the same in that it is composed of a pair of left and right helical springs 40 and a balance weight 41 that rolls on the moving passage 25.

  A horizontal beam portion 7C is installed above the left and right gate posts 7A of the gate portion 7, and an engagement hole 34 is formed on the left and right top surfaces of the valve body 2 and is opposed to the engagement hole 34 of the horizontal beam portion 7C. A lock claw portion 33D as a locking claw is provided at the site to constitute a first locking mechanism as the holding portion 30 that maintains the standing water stopping posture. The lock claw portion 33D is housed in the case 33E so that the front end side thereof is retracted and urged into the case by a spring 33F, and an extrusion mechanism 35 that projects and urges the lock claw portion 33D from the rear end portion is provided. It is. The push-out mechanism 35 includes a rotary shaft 35A that rotates in conjunction with a swinging motion of the float rod 32 that transmits the vertical movement of the float 31 that floats in the upstream water channel of the gate portion 7, and a rotary operation of the rotary shaft 35A. The locking claw portion 33D protrudes and urges the locking claw portion 33D, and the locking claw portion 33D protrudes and engages with the engagement hole 34 when the valve body 2 is in the standing water stopping posture. The posture is held together, and when the upstream water level reaches the flush execution water level, the lock claw portion 33D is retracted and detached from the engaged state, and the posture is changed to the fall posture as shown in FIG. Is done. In addition, in FIG. 8, the circular arc shown with a broken line shows the pipe line which comprises a water channel.

  The lateral beam portion 7C is fixed via a second locking mechanism 55 that can be disconnected from the gate pole 7A. As shown in FIG. 9, the second locking mechanism 55 is a fastener including a locking piece 55A attached to the side portion of the transverse beam portion 7C and an engagement ring 55B attached to the upper side portion of the gate post 7A. It consists of a mechanism.

  By manually releasing the second locking mechanism 55 and detaching the lateral beam portion 7C from the gate pole 7A, the holding state of the standing water stop posture by the first locking mechanism, that is, the holding portion 30, is eliminated. The That is, the forcible release mechanism is configured by the second locking mechanism 55.

  Although not described in detail in the flash gate according to another embodiment described above, the same forced release mechanism 5 and the falling posture maintaining mechanism 6 as those described above are provided.

  Any of the above-described embodiments is an example of the present invention, and the scope of the present invention is not limited by the specific configuration described above, so that the effects of the present invention can be achieved with respect to known flash gates. A forced release mechanism, a posture return mechanism, and a fall posture maintenance mechanism can be appropriately configured.

(A) is a plan view of the flash gate, (b) is a front view. Side view of flash gate Explanatory drawing of posture change mechanism of flash gate Illustration of the main part of the flash gate Schematic perspective view of a flash gate showing another embodiment Another embodiment is shown, (a) is a plan view of a flash gate, (b) is a front view. A side sectional view of a flash gate showing another embodiment The front view of the flash gate which shows another embodiment and a valve body is in a fall posture Explanatory drawing of a 2nd latching mechanism which shows another embodiment

Explanation of symbols

1: Flash gate 2: Valve body 3: Posture switching mechanism 4: Posture return mechanism 5: Forced release mechanism 6: Falling posture maintenance mechanism

Claims (6)

A base is pivotally attached to the bottom of the water channel, and a valve body that can swing between a standing water stopping posture that closes the water channel and a falling posture that opens the water channel, and the water level of the water channel rises to the flush execution water level. A flush gate provided with a posture switching mechanism that maintains the standing water stop posture by a holding portion and releases the holding portion and allows swinging to the falling posture when the flush execution water level is reached,
A flash gate provided with a forcible release mechanism for forcibly releasing the holding of the standing water stopping posture by the posture switching mechanism.   The forcible release mechanism is slidably held by the valve body and stores the overflow water from the valve body, and interlocks with the displacement of the water tank due to the weight of the overflow water flowing into the water tank. The flash gate according to claim 1, further comprising an action rod for forcibly releasing the holding portion by a posture switching mechanism.   The holding portion that maintains the standing water stopping posture is configured by separately arranging a first locking mechanism including a locking claw and an engagement hole in a lateral beam portion provided in the valve body and the gate portion, and The flash gate according to claim 1, wherein the release mechanism comprises a second locking mechanism capable of releasing the connection between the cross beam portion and the gate portion.   4. The flash gate according to claim 1, wherein a posture returning mechanism for automatically returning the valve body in a falling posture to the standing water stopping posture is provided in the valve body. 5.   The flash gate according to claim 4, further comprising a fall posture maintaining mechanism that forcibly stops the return operation to the standing water stopping posture by the posture return mechanism.   The posture return mechanism is arranged around a swing axis of the valve body, and is configured by a spring that constantly biases the valve body in a standing direction, and the falling posture maintenance mechanism releases the biasing force of the spring. 6. The flash gate according to claim 5, wherein the flash gate is constituted by an urging release mechanism.

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