JP2003268752A - Flap type gate with auxiliary opening-closing means - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a flap type gate with an auxiliary opening-closing means for opening-closing a door body by an ordinary small-scale (low capacity) operation means by reducing a water level difference by opening the door body a little by relatively small force even when a large water pressure load based on a large water level difference is applied to the inside and outside of the door body. <P>SOLUTION: The auxiliary opening-closing means 13 of a short stroke is arranged in the end part vicinity of the door body 7 of the flap type gate 11 with an auxiliary opening-closing device. An auxiliary piston 15 is moved by a feed of pressure oil to an auxiliary hydraulic cylinder 14, and a little clearance is made between the door body and a door stop surface 5 by retreating the door body 7 by a microscopic angle Δθ. Outside high water level water of the door body 7 is made to flow inside via this little clearance, and an inside- outside water level difference of the door body 7 is reduced. Afterwards, the door body 7 is opened-closed by ordinary operation of an opening-closing device 8. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flap gate with auxiliary opening / closing means, and more particularly to a door body for opening and closing a vertical opening of a gate frame body of the flap gate, which is slightly separated from the vertical opening and retracted. By providing the auxiliary opening / closing means of a short stroke for opening the opening, the door body is moved by the auxiliary opening / closing means under the condition that different water level pressures are applied to the inside and outside of the door body. After a slight opening, a part of the high water level water is made to flow to the low water level side through the vertical opening to reduce the water pressure difference applied to the inside and outside of the door body, and thereafter The present invention relates to a flap type gate with an auxiliary opening / closing means for opening / closing the door body by using a normal opening / closing device.

[0002]

2. Description of the Related Art A conventional flap gate 1 is, as schematically shown in FIG. 6 of its schematic front view and FIG. 7 of its schematic side view, inside the door body 7 outside (left side in FIG. 7). When the water level on the right side in FIG. 7 is low, the door body 7 pivots counterclockwise around the horizontal support shaft 6 based on the water level difference between the inside and the outside, and abuts on the door-contact surface 5. Since the opening 4 is automatically closed, it is not necessary to provide an opening / closing device for actively opening / closing the door body 7, or even if the opening / closing device 8 for the door body 7 is provided, the opening / closing operation is performed. Although a small force is sufficient and the installation cost and maintenance cost of the flap type gate can be reduced, such a flap type gate 1, especially on the inside and outside of the door body 7 that always hangs from the horizontal support shaft 6. If the water level difference becomes large, the door body of the opening / closing device 8 is temporarily assumed. When the opening / closing operation force of 7 is small,
Since it is difficult for the opening / closing device 8 with a small operation force to open the door body 7 that is heavily loaded on the outside, wait until the water level difference on both sides of the door body 7 becomes small, and then open / close the opening / closing device 8. It is necessary to operate, and there is a tendency that the operation takes time, and there is a tendency that it is difficult to deal with the situation when an emergency occurs.

A hydraulic opening / closing device for a hydraulic flap gate, which was previously proposed by the applicant of the present patent application (not shown: corresponding to the one in which the auxiliary operating means 33 is omitted from FIG. 5 schematically showing a modified example of the present invention). According to the above, the opening / closing mechanism of the hydraulic type opening / closing device can open / close the gate by rotating the shaft of the crank arm attached to the rotating shaft above the gate by expanding / contracting the hydraulic cylinder, but for opening / closing the door body. When the hydraulic system became large in size to secure the necessary rotation moment, the arm of the torque arm had to be lengthened to convert it into thrust, so the size of the flap gate increased, and especially the difference in the required rotation moment Accordingly, it is necessary to increase the length of the torque arm, which in turn increases the stroke of the hydraulic cylinder, resulting in a larger device and higher cost. Was Tsu.

Further, since there is a limit to the stroke of the hydraulic cylinder of the flap type gate, the length of the torque arm is suppressed to increase the diameter of the hydraulic cylinder or the hydraulic cylinder has a large diameter, despite the increase of the rotation moment. The pressure increased and there was no choice.

[0005]

2. Description of the Related Art As described above, in the conventional flap type gate, when the water pressure difference applied to the inside and outside of the door body 7 is relatively small, a large rotational moment is required to open and close the door body 7. Although there is no particular problem because the above does not occur, if a large water pressure difference occurs inside and outside the door body 7, a large rotational moment is required to open and close the door body 7, and the entire apparatus becomes large. Since a large thrust acts on the device, it is necessary to make the horizontal support shaft 6 thick, which tends to increase the cost. For this reason, as a gate that needs to be opened and closed when a large water level difference occurs inside and outside the door body 7, a pull-up type gate using a winch is often used, and a flap type gate is unsuitable.

That is, the flap gate can automatically open and close the door body by a hydraulic load based on the water level difference applied to the inside and outside of the door body, and the opening and closing operation of the door body when there is no water level difference between the inside and outside. Is performed against the combined weight of the door body and the resistance based on the water level difference inside and outside the door body, so even if a large water level difference occurs inside and outside the door body, this water level difference Nothing that can be solved or reduced has been proposed yet.

In order to solve the above-mentioned problems in the prior art, the present invention provides an auxiliary operating means having a short stroke by providing one of a door lower portion of a flap type gate or a door contact portion with which the door abuts. , Even if a large water pressure load based on a large water level difference is applied to the inside and outside of the door body, the door body is slightly opened with a relatively small force, and a part of the high pressure side of the door body An attempt is made to provide a flap type gate with an auxiliary opening / closing means that allows water to flow to a low pressure side to reduce the water level difference between the inside and the outside, and can open / close the door body by a normal small-scale (low capacity) operation means. To do.

[0008]

In order to solve the problems in the conventional example as described above, the present invention provides a horizontal support shaft (6) above the gate frame body (3) of the tributary side (1A) flowing water channel (2), A door body (7) for opening and closing the vertical opening (4) of the gate frame body (3) is provided, and one end of the hydraulic cylinder (8B) is connected to an arm (8A) extending from the horizontal support shaft (6) and the other. The ends are rotatably attached to the upper part of the gate frame body (3) by shafts (8D, 8E), and pressure oil is supplied to and discharged from the hydraulic cylinder (8B) to horizontally support the door body (7). In a flap type gate that is brought into and out of contact with a door contact surface (5) around a vertical opening (4) via an axis (6), the end of the door body (7) or the end of the door body (7) is in contact. The door body (7) is attached to one of the door contact surfaces (5) around the vertical opening (4) around the horizontal support shaft (6). It is a flap type gate with auxiliary opening / closing means provided with auxiliary opening / closing means (13, 23, 33) having a short stroke, which is rotated by a small angle (Δθ) to be slightly separated from the door contact surface (5).

Further, as an auxiliary opening / closing means (23) having a short stroke, at the lower part of the door contact surface 5 around the vertical opening (4) of the abutting gate frame (3) near the end of the door (7). The auxiliary hydraulic cylinder (24) is provided, and the end of the auxiliary piston (25) having a short stroke retracting into the auxiliary hydraulic cylinder (24) is connected to the door contact surface (5) around the vertical opening (4). Abut the inner surface of the closing door body (7),
By feeding pressure oil to the auxiliary hydraulic cylinder (24),
Auxiliary hydraulic piston (2 that advances from the door contact surface (5)
At the end of 5), the inside of the door body (7) is slightly separated from the door contact surface (5).

[0010]

According to the invention of claim 1, the gate frame body 3 is attached to the horizontal support shaft 6 above the gate frame body 3 of the tributary side 1A flowing water channel.
Auxiliary cylinder having a door body 7 for opening and closing the vertical opening 4 of the arm 8A, one end of which is attached to an arm 8A extending from the horizontal support shaft 6 and the other end of which is pivotably attached to the upper portion of the gate frame 3 such as shafts 8D and 8E. Regarding the flap type gate in which the vertical opening 4 is opened and closed by the door body 7 via the horizontal support shaft 6 by supplying and discharging pressurized oil to and from 8B, the lower portion of the door body 7 and the same door body 7
The ends of the auxiliary pistons 14, 24, 34 of the short opening / closing auxiliary opening / closing means 13, 23, 33 provided on one of the lower contacting door contact surfaces 5 are brought into contact with each other, and the inside of the door body 7 is hit. It is separated from the surface 5 by a small amount of Δθ to form a minute gap between the two, and a part of the high water level water of the door body 7 is caused to flow to the low water level side through the minute gap so that the inside of the door body 7 is closed. The water level difference on the outside is reduced, and thereafter, the door 7 is opened / closed by the opening / closing device 8 in a normal operating manner.

According to the second aspect of the present invention, the end opens and closes the vertical opening 4 below the door contact surface 5 around the vertical 4 of the gate frame 3 with which the door 7 abuts. It comes into contact with the inside of the door body 7 and slightly moves the door body 7 from the door contact surface by Δ.
Since the auxiliary hydraulic cylinder 24 of the auxiliary operation means 23 having a short stroke for retreating θ is provided, if the water level difference between the inside and outside of the door body 7 is large and a large water pressure is applied to the door body 7, the gate frame body Inside the auxiliary hydraulic cylinder 24 having a short stroke by the pressure oil provided around the lower part of the door contact surface 5 of the gate frame 3 and supplied and discharged from the pipe line along the door contact surface 5 around the vertical opening 4 of the gate frame body 3. Auxiliary piston 25
The door body 7 is slightly retracted by the movement of, and a minute gap is formed between the vertical opening 4 and the inside of the door body 7, and a part of the high water level water outside the door body 7 is moved to the low water level side inside thereof. The door body 7 is made to flow to reduce the water level difference between the inside and outside of the door body 7, and thereafter, the door body 7 is opened and closed by the opening / closing means 8 in a normal operation manner.

[0012]

Embodiments Hereinafter, first and second embodiments of the flap gate with auxiliary opening means according to the present invention and modifications thereof will be described with reference to the accompanying FIGS. Note that FIG.
The same name and the same reference numeral are used for the portions common to the conventional example shown in FIG.

[0013]

[First Embodiment] FIG. 1 is a schematic front view of a first embodiment of a flap gate with auxiliary opening / closing means according to the present invention, FIG. 2 is a schematic vertical cross-sectional view of essential parts thereof, and FIG. 3 is A of FIG. It is an expanded longitudinal cross-sectional view of the principal part along the -A line.

1-3, 11 is the first of the present invention
In the flap gate with auxiliary opening / closing means of the embodiment, the flap gate 11 with auxiliary opening / closing means hangs substantially vertically on a horizontal support shaft 6 provided on the upper part of the gate frame 3 of the flowing water channel on the tributary side 1A. The upper part of the door 7 is fixed. The end of the arm 8A extending from the horizontal support shaft 6 to the upper left (FIG. 2) is pivotally attached to one end of the hydraulic cylinder 8B, and the other end of the hydraulic cylinder 8B is pivoted to the gate frame 3 of the running water passage. The horizontal support shaft 6 can be mounted by mounting the shaft 8D as much as possible and supplying and discharging the pressure oil to and from the hydraulic cylinder 8B.
The door body 7 that hangs vertically in a vertical direction and contacts the door-contact surface 5 around the vertical opening 4 of the vertical gate frame 3 is rotated by, for example, θmax to fully open the vertical opening 4. Or send pressure oil to the hydraulic cylinder 8B in the opposite direction to the above,
The door 7 is made substantially vertical to close the opening 4.

Further, in the state where the door body 7 hangs substantially vertically, if high water level water acts on the outside of the door body 7 from the inside, the water level difference between the inside and the outside of the door body 7 causes the door body to move. 7 automatically closes the vertical opening 4. Note that these operations are performed by the door body 7 by the auxiliary opening / closing means 1 described later.
6, except that the fine angle Δθ is rotated by 3.
This is almost the same as the conventional example shown in FIG.

Reference numeral 13 denotes an end portion (lower portion in FIG. 2) of the door body 7,
Auxiliary opening / closing means provided on both outer sides of the door body 7 on the left and right sides (FIG. 2) so as to be perpendicular to the surface of the door body 7 (left and right direction in FIG. 1). It is composed of an auxiliary hydraulic cylinder 14 and an auxiliary piston 15 projecting from the auxiliary hydraulic cylinder 14 to the inside (right side in FIG. 2) of the door body 7, and the end of the piston 15 is a door around the opening 4 of the water outlet. It contacts the contact surface 5. At this time, the piston 15 of the auxiliary cylinder 14 is configured so as not to obstruct the closing of the opening 4 due to the contact with the door contact surface 5 around the vertical opening 4 by the door body 7.

The pressure oil is supplied to and discharged from the auxiliary cylinder 14 by means of a hydraulic pressure (not shown) provided around the horizontal support shaft 6 and on the gate frame body 3 of the flowing water passage 2 through the back surface of the door body 7 and the like. It is supplied from a source through a pipe 16 and is performed by a switching operation of a switching valve (not shown).

[0018]

[Operation of First Embodiment] The door body 7 has a substantially vertical shape,
When the right side (FIG. 1) of the door body comes into contact with the door stop portion of the outflow port and closes the opening, if the outer side (left side) of the door body 7 is exposed to a higher water level than the inner side (right side), When the door body 7 is strongly pressed against the door contact surface 5 and the cylinder 8A of the opening / closing device 8 cannot open the door body 7, first,
Pressure oil is sent to the hydraulic cylinder 14 of the auxiliary opening / closing means 13,
The end portion of the piston rod 15 is brought into contact with the door contact surface 5, and the door body 7 is rotated by a small angle Δθ in the clockwise direction around the horizontal support shaft 6 (FIG. 1) by the reaction thereof, and the position indicated by the chain line in FIG. 7a
Then, a small gap is formed between the right side surface of the door body 7 and the door contact surface 5, and a part of the high water level water outside the door body 7 (left side in FIG. 1) is inserted through this slight gap. , The inner side of the door body 7 is made to flow to the tributary side 1A, and the inner side of the door body 7 (tributary side 1B) is made to flow to the low water level side, and the water level is raised to bring the water levels inside and outside the door body 7 close , The pressing force based on the water level difference applied to the inside and outside of the door body 7 is reduced, and thereafter, the door body 7 is opened by the cylinder 8B of the opening / closing device 8 in a normal operation manner up to the full opening angle θm. Operated.

[0019]

Second Embodiment Next, a flap type gate 21 with an auxiliary opening / closing means according to a second embodiment of the present invention will be described with reference to FIG. Note that the same names and reference numerals are used for the parts that are common to the first embodiment.

In FIG. 4, the door contact surface of the outlet 2 around the vertical opening 4 is contacted with the horizontal support shaft 6 and the end of the door body 7 which rotates around the coaxial support shaft 6, The door body 7 is provided on the horizontal axis 6 above the gate frame body 3 of the 1A flowing water channel on the tributary side,
This door body 7 is substantially the same as that of the first embodiment in that the door body 7 is opened and closed by supplying and discharging pressure oil to and from the cylinder 8B of the opening / closing device 8.

However, in the second embodiment, the auxiliary opening / closing means 2 for rotating the horizontal support shaft 6 in the clockwise direction by a small angle.
By embedding the short hydraulic stroke 24 of the auxiliary hydraulic cylinder 24 in the door contact surface 5 around the vertical opening 4, the auxiliary hydraulic cylinder 24 is protected by the gate frame 3 and the auxiliary hydraulic cylinder 24. By embedding the pipes 26 for supplying and discharging pressure oil to the inside of the frame body 3, they are similarly protected.

The auxiliary opening / closing means 23 has a door body 7 in which an end portion of an auxiliary piston 25 extending from an auxiliary hydraulic cylinder 24 having a short stroke extends substantially vertically from the horizontal support shaft 6.
When the water pressure of a high water level is applied to the outer side (left side in FIG. 4) of the door body 7 by contacting the inner side surface (right side surface in FIG. 4) of the door body 7, the door body 7 is resisted against the high water level pressure and a small angle Δθ. 4 is rotated in the clockwise direction in FIG. 4 and a slight gap between the inside of the door body 7 and the door-contact surface 5 after the minute angle Δθ is rotated causes the door body 7 to move.
A part of the outer high water level water is made to flow into the low water level tributary side 1A inside the door body 7, the water levels inside and outside the door body 7 are brought close to each other, and then by the cylinder 8A of the opening / closing device 8, Open and close the. The preliminary structure and action are almost the same as those of the first embodiment.

[0023]

[Modification] Next, a modification of the flap gate with auxiliary opening / closing means according to the present invention will be described with reference to FIG. In addition, the same name and the same reference numeral are used for the portions common to the first and second embodiments. FIG. 5 shows the vertical opening 4 of the gate frame body 3 of the tributary side 1A running water channel 2, the door body mounting arm 8 on the horizontal support shaft 6 above the gate frame body 3.
An auxiliary opening means 33 having a short stroke is provided at the end of the door body 7 of the flap type gate 31 which is opened and closed by the door body 7 attached by F.

The inside of the door body 7 (right side in FIG. 5)
A float 38 is provided in the upper part, and when the vertical opening 4 is closed by the door body 7, if the water levels inside and outside the door body 7 are both high and almost equal, Due to the buoyancy received by the float 38, the inner side surface of the door body 7 is brought into contact with the door contact surface 5 around the vertical opening 4 against the rotational force of the weight 37 at the end of the arm 8A extending from the horizontal support shaft 6. Apply pressure and block. In this state, a water pressure slightly higher than the inside is applied to the outside of the door body 7, and the door body 7 is attached to the door-contact surface 5 around the vertical opening 4 due to the water level difference between the inside and the outside. It works almost the same as the one that is pressed.

In the flap gate 31 with auxiliary opening / closing means of this modification, by supplying / discharging pressure oil from the pipe line 36 to / from the auxiliary cylinder 34 of the auxiliary opening / closing means 33 provided at the lower portion of the door body 7, The end portion of the auxiliary piston 35 is projected and the door body 7 is rotated by a small angle Δθ in the clockwise direction around the support shaft 6 (the same as in FIG. 5) to be slightly separated from the door contact surface 5 and between them. And gaps are made, and high water level water on the outside of the door body 7 flows inward (or in the opposite direction) from the minute gaps to reduce the water level difference between the inside and outside of the door body 7 and thereafter.
Opening / closing operation of pressure oil to the hydraulic cylinder 8B of the opening / closing device 8 is performed.

The auxiliary opening / closing means 34 of the flap gate 31 with the auxiliary opening / closing means of the modified example schematically shown in FIG. 5, particularly the auxiliary hydraulic cylinder 34, is the first one shown in FIGS. Similar to the auxiliary hydraulic cylinder 14 of the embodiment, it is provided at the end portion of the door body 7, and like the auxiliary hydraulic cylinder 24 of the second embodiment schematically shown in FIG. 4, the door contact surface 5 around the vertical opening 4 is provided. It can also be configured to be embedded in the section,
In any case, the same operation as described above is performed.

[0027]

The flap gate with auxiliary opening / closing means according to the present invention has a structure as described above and operates, so that it has substantially the same operation and effect as a normal flap gate, and also has the following features. Has a unique effect.

(1) A short stroke for slightly opening the door body in either the vicinity of the end of the flap gate door body or the door contact surface around the vertical opening of the gate frame body of the running water channel. Since the auxiliary opening / closing means is provided, tentatively, due to the water level difference between the inside and outside of the door body, the door body is strongly pressed against the door contact surface around the vertical opening, and pressure oil is supplied to and discharged from the hydraulic cylinder of the auxiliary opening / closing means. Then, the auxiliary piston is advanced by a small stroke, and the door body is rotated by a small angle in the clockwise direction around the horizontal support axis (Figs. 1 and 3) and retracted to form a minute gap between the inside of the door body and the door contact surface. After making a part of the high water level water inside and outside the door body to the low water level side on the opposite side through this minute gap to reduce the water level difference inside and outside the door body, It is opened or closed by the normal door opening / closing device.

(2) A simple structure change is provided by providing an auxiliary opening / closing means for the door body having a short stroke on either the door contact surface around the vertical opening of the gate frame body or the end portion of the door body. The present invention can be easily implemented in existing flap gates, substantially without changing other structures.

(3) Since the stroke of the auxiliary cylinder is short and short, even if the auxiliary cylinder is provided at the end of the door body, the auxiliary cylinder does not significantly project from the door body.

(4) If an auxiliary cylinder having a short stroke is provided as an auxiliary opening / closing means for the door body on the door contact surface around the vertical opening of the gate frame of the flap type gate, the auxiliary cylinder can be connected to the auxiliary cylinder. The pressure oil supply / drain pipe can be configured simply so as to follow the door contact surface around the vertical opening of the gate frame, and the stroke of the auxiliary cylinder can be adjusted to the thickness of the end of the door. Can be selected without being
The degree of freedom in design is further improved.

[Brief description of drawings]

FIG. 1 is a schematic front explanatory view of a first embodiment of a flap gate with auxiliary opening / closing means according to the present invention.

FIG. 2 is a schematic vertical sectional explanatory view thereof.

FIG. 3 is a schematic vertical sectional explanatory view taken along the line AA of FIG.

FIG. 4 is a schematic longitudinal explanatory view of a second embodiment of the flap gate with auxiliary opening / closing means according to the present invention.

FIG. 5 is a schematic vertical explanatory view of a modified example of the present invention.

FIG. 6 is a schematic front view of a main part of a conventional flap type gate opening / closing device.

FIG. 7 is a schematic longitudinal explanatory view thereof.

[Explanation of symbols]

1A ... Branch line side 1B ... Main river side 2 ... Flow channel 3 ... Gate frame 4 ... Vertical opening 5 ... Door contact surface 6 ... Horizontal support shaft 6A ... Bearing 7 ... Door body 8 ...... Door opening / closing device 8A ...... Arm 8B ...... Hydraulic cylinder 8C ...... Piston 8D, 8E ...... Shaft 8F ...... Door mounting arm 11 ...... Flap type gate with auxiliary opening and closing device (first embodiment) 13, 23, 33 ... Auxiliary opening / closing devices 14, 24, 34 ... Auxiliary hydraulic cylinders 15, 25, 35 ... Auxiliary pistons 16, 26, 36 ... Piping 21 ... A flap gate with an auxiliary opening / closing device (second embodiment) ) 31 …… Flap type gate with auxiliary opening / closing device (variant) 37 …… Balance weight 38 …… Float Δθ …… Minimal opening angle of door θm …… Maximum opening angle of door

Claims (2)

[Claims] 1. A door for opening and closing a vertical opening (4) of the gate frame (3) on a horizontal support shaft (6) above the gate frame (3) of the flowing water channel (2) on the tributary side (1A). The body (7) is provided, and one end of the hydraulic cylinder (8B) is rotatably attached to the arm (8A) extending from the horizontal support shaft (6) and the other end is rotatably attached to the upper portion of the gate frame body (3). (8D, 8
E) Wear, supply and discharge pressure oil to the hydraulic cylinder (8B),
A flap type gate in which the door body (7) is brought into and out of contact with a door contact surface (5) around a vertical opening (4) via a horizontal support shaft (6), in the end portion of the door body (7) or the door. Body (7)
The door body (7) is rotated by a minute angle (Δθ) around the horizontal support shaft (6) on one of the door contact surfaces (5) around the vertical opening (4) with which the end portion abuts. A flap-type gate with auxiliary opening / closing means, which is provided with auxiliary opening / closing means (13, 23, 33) having a short stroke and a small distance from the door contact surface (5). 2. An auxiliary opening / closing means (23) for short strokes is provided below the door contact surface 5 around the vertical opening (4) of the abutting gate frame (3) near the end of the door (7). The auxiliary hydraulic cylinder (24) is provided, and the end of the auxiliary piston (25) having a short stroke retracting into the auxiliary hydraulic cylinder (24) is connected to the door contact surface (5) around the vertical opening (4). The auxiliary hydraulic piston (2) that advances from the door contact surface (5) is brought into contact with the inner surface of the door body (7) to be closed and the pressure oil is fed to the auxiliary hydraulic cylinder (24).
The flap gate with auxiliary opening / closing means according to claim 1, wherein the inside of the door body (7) is slightly separated from the door contact surface (5) at the end of (5).