JP2553449Y2 - Miter gate - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a miter gate for ships and fish locks, and more particularly to a miter gate of the type in which left and right doors are opened and closed with a rotating hinge as a fulcrum.

[0002]

2. Description of the Related Art For example, a miter gate, a slide gate, or the like is employed as a lock chamber gate. However, if the fluctuation of the outside water level is large, the slide gate should be a slide gate 1a having a high head as shown in FIG. In addition, as shown in FIG. 11, it is necessary to use a porous slide gate 1b, so that the equipment becomes large and the operation of opening and closing the gate is complicated. In addition, 2 in FIG. 10 indicates a winch.

[0003]

On the other hand, in the case of a miter gate, there is no such a drawback, but at present, the opening and closing of the miter gate is mechanically performed using a hydraulic cylinder, a wire rope, or the like.

The present invention has been made in view of the above-mentioned problems, and has as its object to provide a miter gate which enables economy and labor saving in management.

[0005]

In order to achieve the above object, a miter gate according to the present invention is a miter gate which opens and closes left and right doors in a double-opening manner with a rotating hinge as a fulcrum. Guide rails are arranged at line-symmetrical positions so that the guide surfaces face each other, and guide rails are arranged so that the relative distance between the guide surfaces becomes narrower as going upward, and according to the water level difference inside and outside the door body and the presence or absence of internal water. Thus, a float is provided that moves up and down by being guided by these guide rails to open and close the left and right doors.

[0006]

In the miter gate according to the present invention having the above-described structure, when water is injected into the back side of the door, buoyancy acts on the float, and the float is guided by the guide rails and tends to rise. . At this time, as shown in FIG. 3, assuming that the angle between the guide surfaces 12a and 12b of the guide rail 12 and the vertical line is θ, the guide surfaces 12a and 12b
, The force of (F / 2) · sin θ acts on each of them. Therefore, this guide surface 12a
Assuming that the distance between the point of application of the force in 12b and the rotating hinge 13 is L, the left and right doors 11a are generated by the buoyancy F.
A rotation moment about the rotation hinge 13 of (F / 2) sin θ · L acts on 11b.

On the other hand, when there is a water level difference between the left and right door bodies 11a and 11b, the door bodies 11a and 11b
Assuming that the water level difference when the water level on the front side of a.11b is high is +, the closing moment acting to close the door bodies 11a and 11b due to the inner and outer water level differences and the door body 11a
-The total moment of the resistance moment acting during the opening operation of 11b acts.

Therefore, if the combined moment of the rotation moments around the rotating hinge 13 acting on the left and right door bodies 11a and 11b is larger than the combined moment of the closing moment and the resistance moment, the float 14 will be connected to the guide rail 1
2, the doors 11a and 11b are opened and the doors 11a and 11b are opened. Conversely, if the combined moment of the rotational moment is smaller than the combined moment of the closing moment and the resistance moment, the door body will be closed from the open state, and if it is in the closed state, the state will be maintained.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A miter gate according to the present invention will be described below with reference to an embodiment shown in FIGS. FIG. 1 is a diagram showing the miter gate of the present invention in a closed state, (A) is a rear view,
(B) is a view taken along the line BB in FIG. (A), (C) is a sectional view taken along the line CC in FIG. (A), and FIG. 2 is a view showing the miter gate of the present invention in an open state. (C) is a view similar to (A) to (C) of FIG. 1, FIG. 3 is an explanatory view at the time of gate opening operation of the miter gate of the present invention, (A) is a plan view, and (B) is a float and a guide rail. 4 (C) is an enlarged view of a main part of FIG. 4 (B), and FIGS. 4 to 8 are schematic illustrations of opening and closing operations of the miter gate of the present invention.

In the drawings, reference numerals 11a and 11b denote a pair of left and right doors constituting the miter gate of the present invention, which are opened and closed by a rotating hinge 13 in a double-opened manner.

Reference numeral 12 denotes a guide rail disposed on the back of the left and right doors 11a and 11b at symmetrical positions so that the respective guide surfaces 12a and 12b face each other. These guide surfaces 12a and 12b At the lower limit position, as shown in FIG. 1 (C), they oppose each other in the fully closed state, and the relative distance becomes narrower upward from the lower limit position, and gradually becomes curved in a plan view. Then, at the upper limit position, as shown in FIG. 2 (C), they are formed so as to face each other in the fully open state.

Reference numeral 14 denotes a float, on both sides of which a guide roller 15 is rotatably pivoted. The guide roller 15 has a full width including the guide roller 15 as shown in FIG. The distance between the doors 11a and 11b is set equal to the distance between the doors 11a and 12b, and the doors 11a and 11b are opened by the force of the guide rollers 15 pressing the guide surfaces 12a and 12b by the lift based on the buoyancy of the float 14. In addition, 1
Reference numeral 6 denotes a guide roller rotatably provided on both sides of the float 14. The guide roller 16 is for maintaining the relative positional relationship between the float 14 and the doors 11a and 11b.

The miter gate according to the present invention is configured as described above. Next, the movement of the float 14 when it is opened and closed will be described with reference to FIGS.

FIGS. 4 to 8 show the case where the miter gate according to the present invention is used in the lock chamber 17. Reference numeral 18 denotes a water injection valve, and 19 denotes a drain valve.

FIG. 4 shows a case where the water level inside the lock chamber 17 is lower than the water level outside the lock chamber 17, in which case the left and right doors 11a and 1
1b is a closed state. When water is injected into the lock chamber 17 by opening the water injection valve 18 in this state, the water level difference Δh inside and outside the lock chamber 17 gradually decreases as shown in FIG. Works.

The buoyancy is F, the angle between the guide surfaces 12a and 12b of the guide rail 12 and the vertical line is θ, and the guide surface 12
Assuming that the distance between the point of action of buoyancy at a and 12b and the rotating hinge 13 is L, the buoyancy F acting on the float 14 causes the left and right door bodies 11a and 11b to have (F / 2).
・ A rotational moment of sin θ · L acts.

On the other hand, when the water level outside the lock chamber 17 is higher, the closing moment for closing the left and right doors 11a and 11b acts on the left and right doors 11a and 11b due to the water level difference Δh. I do.

Therefore, the rotational moment for opening the left and right doors 11a and 11b caused by pouring water into the lock chamber 17 causes the closing moment and the left and right doors 11a and 11b to be opened due to the water level difference Δh. If the combined moment with the resistance moment generated at the time of operation is larger, as shown in FIG. 6, the float 14 starts moving obliquely upward along the guide surfaces 12a and 12b of the guide rail 12, and the left and right door bodies 11a and 11b To open.

Further, from the state shown in FIG. 6, the water in the lock chamber 17 is discharged by opening the drain valve 19, and the closing moment generated by the water level difference Δh ′ between the inside and the outside of the lock chamber 17 and the right and left of the lock chamber 17 are changed. When the combined moment with the resistance moment generated at the time of closing the doors 11b, 11b becomes smaller than the rotational moment due to the buoyancy of the float 14, the float 14
Is pushed down obliquely along the guide surfaces 12a and 12b of the guide rail 12, and as shown in FIG.
a.11b closes.

[0020]

As described above, the miter gate according to the present invention does not require power to open and close it, so that it is economical and the management can be omitted. In particular, the miter gate of the present invention is effective when the fluctuation of the outside water level is large. That is, as shown in FIG. 9, by providing the rising and lowering range of the float 14 below the lowest water level of the outside water level, the opening and closing operation can be automatically performed at any position of the outside water level according to the fluctuation of the water level. become.

[Brief description of the drawings]

FIG. 1 is a view showing a miter gate of the present invention in a closed state;
(A) is a rear view, (B) is an arrow BB view of the (A) view,
(C) is a sectional view taken along line CC of FIG.

FIG. 2 is a view showing the miter gate of the present invention in an open state;
(A)-(C) are the same figures as (A)-(C) of FIG.

3A and 3B are explanatory views of the miter gate of the present invention at the time of gate opening operation, wherein FIG. 3A is a plan view, FIG. 3B is a front view of a float and a guide rail, and FIG. 3C is an enlarged view of a main part of FIG. is there.

FIG. 4 is a schematic explanatory view of the opening / closing operation of the miter gate of the present invention.

FIG. 5 is a schematic explanatory view of the opening / closing operation of the miter gate of the present invention.

FIG. 6 is a schematic explanatory view of the opening and closing operation of the miter gate of the present invention.

FIG. 7 is a schematic explanatory view of the opening / closing operation of the miter gate of the present invention.

FIG. 8 is a schematic explanatory diagram of the opening / closing operation of the miter gate of the present invention.

FIG. 9 is a diagram for explaining the effect of the present invention.

FIG. 10 is an explanatory diagram of a high head slide gate.

FIG. 11 is an explanatory view of a perforated slide gate.

[Explanation of symbols]

 11a / 11b Door 12 Guide rail 12a / 12b Guide surface 13 Rotating hinge 14 Float

Claims (1)

(57) [Scope of request for utility model registration] 1. A miter gate which opens and closes left and right doors in a double-opening manner with a rotating hinge as a fulcrum. The guide rails are arranged so that the relative distance between the guide surfaces is narrow, and the guide rails are moved up and down by being guided by these guide rails according to the water level difference inside and outside the door and the presence or absence of internal water to open and close the left and right doors. A miter gate equipped with a float.