JPS5912266Y2 - Parent-child sector gate - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a sector gate that is installed in the middle of a spillway that is always at a full water level (planned water level, restricted water level, etc.).

In the flood control dam shown in FIG. 1, the design flood level A is handled by operating the spillway gate 2 provided corresponding to the upper end crease 1A of the dam body 1.

In dams whose purpose is to control floods,
During seasonal flood periods (rainy season, typhoon season, snowmelt season, etc.), the water level is always lowered to the full water level B (planned water level, restricted water level, etc.) in advance to cope with water outflow during the flood season.

That is, the constant full water level B is dealt with by operating the main gate 4 of the water discharge pipe 3 provided at the lower part of the dam body 1.

5 indicates a preliminary gate of the water discharge pipe 3.

In this case, the water discharge pipe 3, main gate 4, etc. that perform the spillway function are always installed at a position below the full water level B, and therefore driftwood and other debris accumulates at the level of the always full water level B. The current situation is that we are having trouble processing it.

On the other hand, it is strongly desired that the water discharged downstream be the surface water stored in the dam.

In recent years, in order to meet such demands, a spillway 6 has been installed at the level of the full water level B to release the surface water of the dam reservoir, and at the same time discharge the waste accumulated on the upstream side of the dam. Consideration has been given to letting it flow.

In other words, there is a sector gate 1 in the middle of the spillway discharge channel 6.
7 is provided, and the sector gate 7 is moved upward to open the spillway 6 and allow water to flow down.

8 shows the preliminary gate of the spillway discharge channel.

By the way, the waste flowing out of the spillway discharge channel 6 flows through the upper part of the spillway discharge channel 6, so when water is discharged with the sector gate 7 slightly opened, the sector gate 7
Dust gets caught in the lower part of the skin play 11F and cannot flow down.

For this purpose, the heavy sector gate 7 must be pulled up completely, that is, by more than the required amount, which increases power consumption, and furthermore, this means that the water level B cannot be maintained at all times.

Also, the garbage caught on the inner surface of sector gate 7,
When the sector gate 7 is pulled up, it may get caught between the skin plate and the water stop rubber, for example, and this will impede the vertical movement of the sector gate 7.

From this point on, as a method that allows the smooth outflow of garbage while always controlling the full water level B, a method can be considered in which the sector gate 7 is pulled down (dropping) to create a spillway by overflow.

However, the problem with this type is that the overflow water and debris collide with the legs supporting the sector gate 7, the main girders and auxiliary girders placed on the back of the skin plate, and this is inconvenient both physically and structurally. , These overflow water and dust collide with a part (rod) of the switchgear.

The present invention proposes a sector gate that can solve the above problems, and a first embodiment thereof will be described below with reference to FIGS. 2 to 7.

1 is the dam body, and 6 is the spillway.

The entire length of the spillway discharge channel 6 is the same width, and a parent gate 9 is provided in the middle thereof.

50 is a child gate.

The main gate 9 consists of a skin plate 10 having a width L that is approximately equal (slightly narrower) to the spillway width L for spill water discharge, a fan-shaped side rectifying plate 11 extending rearward from both sides of the skin plate 10, and these skin plates 10. It consists of an upper current plate (overflow current plate) 12 provided between the upper edge of the plate 10 and the side current plate 11.

The main part of the fan of this main gate 9 is attached near the downstream bottom surface 6a of the spillway discharge channel 6 via a trunnion pin 13, and thus can swing open and close using the downstream bottom surface 63 as a fulcrum. Become.

A lower gate chamber 14 is formed in communication with the bottom surface of the spillway discharge channel 6, into which the parent gate 9 can move in and out, and the skin plate 10 is moved into the lower gate chamber 14 by lowering the parent gate 9. It is configured so that it can be opened by letting the person leave, and can be closed by being raised to protrude from the lower gate chamber 14.

Note that when the main gate 9 is completely retracted into the lower gate chamber 14, the upstream base 6b of the spillway deformation channel 6 and the upper rectifier plate 12
are flush with each other, and a step H is created between the upper current plate 12 and the downstream bottom surface 6a.

Reference numeral 15 denotes a cylinder device with a locking device, which is an example of an opening/closing device provided in the lower gate chamber 14, and is composed of a cylinder body 17 attached to the dam body 1 via a horizontal pin 16, its piston rod 18, etc. The upper end of the main gate 9 is connected to the main gate 9 via a horizontal pin 19.

20 is a water stop rubber attached to the front edge side of the side rectifying plate 11;
21 also shows a water stop rubber attached to the side surface of the upper edge.

In addition, both water-stop rubbers 20.2 are installed on the sides of the spillway discharge channel 6.
1, a side wall plate 22 is provided.

Reference numeral 23 indicates an upper water stop rubber attached to the dam body 1, and 24 indicates a bottom water stop rubber.

A stopper 25 is provided on the bottom surface of the lower gate chamber 14 to receive the completely retracted door body 9, thereby providing a measure against vibration.

Although the lower gate room 14 may be inundated with water due to operations during a flood, it is only for a short time and infrequent, and the water is drained away using the drainage ditch formed in the inspection gallery 26.

27 is the downstream end of the upper current plate 12 and the spillway 6
A flexible sealing device is provided between a rubber mounting plate 28 connected to the dam body 1 side and a fixing device (bolt, nut, etc.) 29 connected to the rubber mounting plate 28 at one end. and the other end is attached to the upper rectifying plate 12.
A backflow prevention rubber 31 is attached to the back side of the housing via a fixture 30.

As mentioned above, a step H occurs between the upper current plate 12 and the downstream bottom surface 6a, but in order to prevent negative pressure from occurring due to this, an air box communicating with the air pipe 32 is installed at the starting end of the downstream bottom surface 6a. 33 are provided.

Further, the length of the upper current plate 12 to the downstream end is determined so that falling water does not directly hit the air box 33.

34 and 35 are air pipes for sending air to the lower surface of the overflow water vein when the door body 9 is operated at a high water level.

The child gate 50 is disposed in a groove 51 formed at the upstream side of the upper current plate 12, and its upstream end is connected to the upper current plate 12 via a hinge 52 so as to be vertically movable. has been done.

Reference numeral 53 denotes a cylinder device with a locking device for vertical movement of the child gate 50, which includes a cylinder main body 56 whose lower end is connected via a pin 55 to a crossbeam 54 that is stretched between the both side rectifying plates 11; The upper end is the through hole 57 of the upper rectifying plate 12
It consists of a pin 1 and a rod 59 connected to the center of the back surface of the child gate 50 through a pin 58.

Further, the width of the child game 50 is made the same as the width 1 of the parent gate 9, and water stop rubber 60 that comes into contact with each side wall plate 22 is attached to each side edge of the child game 50.

Further, as shown in FIG. 3, when the child gate 50 is housed in the groove 51, a waterproof rubber (not shown) is disposed between the outer peripheral edge of the child gate 50 and the parent gate 9. Care is taken to prevent water from entering the lower gate chamber 14 from the through hole 57.

Further, even when the secondary gate 50 is rotated upward as shown in FIG. 7, water stop rubber (not shown) is also provided at the hinge 52 to prevent water from leaking from the hinge 52.

The operation of the above structure will be explained.

The state shown in Figure 2 shows the state at the time of water sufficiency.

That is, the main gate 9 is pulled up by the extension of the piston rod 18 of the cylinder device 15, and the spillway discharge channel 6 is opened.
is completely occluded by skin plays 1 to 10.

Moreover, the state shown in FIG. 3 shows the state at the time of spillway.

That is, by reducing the piston rod 18, the main gate 9
completely retracts into the lower chamber 14, so that the upper surface of the upper rectifying plate 12, the upper surface of the child gate 50, and the upstream bottom surface 6b are flush with each other.

At this time, the part of the stepped drop H is prevented from becoming negative pressure by the air supplied from the air box 33.

Next, when performing small flow rate flood adjustment and flowing down of waste in a state where the water level is always full B, the piston rod 59 of the cylinder device 53 is extended in the state shown in FIG. Raise it at an appropriate angle,
The state shown in FIG. 7 may be used.

In this state of always full water level B, not much water pressure is applied to the sector gate, so the flow rate can be sufficiently adjusted by the child gate 50.

Further, since the flow rate is adjusted by the child gate 50, which is smaller than the main gate 9, only a small amount of power is required, and the opening degree of the spillway 6 can be quickly adjusted.

A second embodiment of the present invention will be described based on FIG.

In this embodiment, the downstream side of the upper current plate 12 of the main gate 9 is recessed to form a stepped portion 65, and the child gate 50 is disposed within the stepped portion 65.

Further, the lower end of the cylinder body 56 of the cylinder device 53 is connected via a pin 55 to a fixed spar 66 disposed within the lower gate chamber 14 .

67 is an upper water stop rubber for the child game 50 attached to the dam body 1.

The configuration other than the above configuration is almost the same as the first embodiment.

The effects of this second embodiment are almost the same as those of the first embodiment.

A third embodiment of the present invention will be described based on FIG. 9.

In this embodiment, the portion of the upper current plate 12 of the main gate 9 except for the upstream end is recessed to form a stepped portion 68, and a long slave gate 50 is disposed within the stepped portion 68. It has been done.

The structure other than this is almost the same as that of the second embodiment, and its operation and effect are also almost the same as those of the first and second embodiments.

As described above, the parent-child sector gate of the present invention consists of a parent gate and a child gate disposed at a predetermined position on the upper current plate of the parent gate, so that the parent gate can be completely By pulling up the spillway, the spillway can be completely blocked, and by completely retracting the parent gate into the lower gate chamber, the spillway can be created.

Furthermore, by operating the child gate, it is possible to adjust the small flow rate due to overflow and to ensure smooth outflow of debris.

Especially when the water level is at full capacity during the design flood, a large main gate is used to create a spillway with a large flow rate.

When the water level is always full, a small slave gate can be used to create a spillway with a small flow rate, and it can be freely adjusted according to the water level.

[Brief explanation of the drawing]

Fig. 1 is a vertical side view showing a general example of an arch dam, Figs. 2 to 7 show a first embodiment of the present invention, and Fig. 2 is a part of the main part showing a state completely closed by a parent gate. cutaway side view,
Fig. 3 is a partially cutaway side view of the main part showing the discharge state, Fig. 4 is a partially cutaway plan view of Fig. 3, and the left half view of Fig. 5 is a Va-Va sectional view in Fig. 2; The right half of Figure 5 is the same v
FIG. 6 is an enlarged view of the VI section in FIG. 2, and FIG. 7 is a partially cutaway side view of the main part showing a state in which the child gate is pulled up. FIG. 8 is a partially cutaway side view of a main part showing a second embodiment of the present invention, and FIG. 9 is a partially cutaway side view of a main part showing a third embodiment of the present invention. 6... Spillway discharge channel, 9... Parent gate, 10... Skin plate, 11...
・Side rectifier plate, 12... Upper rectifier plate, 13...
... Trunnion pin, 14 ... Lower gate chamber, 15 ... Cylinder device (opening and closing device), 27
... Flexible sealing device, 33 ... Air box, 50 ... Child gate, 51 ... Groove,
52...Hinge, 53...Cylinder device (rotating device), 65, 68...Step part, L...
...Spillway width, L...Skin plate width, H...Step drop, B...Constantly full water level.

Claims (1)

[Scope of utility model registration request] A sector gate consisting of a parent gate and a child gate arranged in the middle of a spillway discharge channel provided at the level of the full water level, the parent gate having a width approximately equal to the spillway discharge channel width. It consists of a wide skin plate, side current plates extending rearward from both sides of this skin plate, and an upper current plate provided between the upper edges of these skin plates and the side current plates, and this main gate is The structure is such that the spillway can be swung open and closed using a fulcrum near the bottom wall of the spillway, and a lower gate chamber communicating with the spillway is provided, and the parent gate is connected to the lower gate chamber. An opening/closing device for this parent gate is provided in the lower gate chamber, and a flexible sealing device is provided between the downstream end of the upper rectifier plate and the bottom side of the spillway discharge channel, The child gate is arranged at a predetermined position on the upper current plate of the parent gate, and the upstream end of the child gate is rotatably connected to the upper current plate, and the child gate is rotated by a rotation device. A parent-child type sector gate, characterized in that the width of the child gate is the same or almost the same as that of the parent gate, and the width of the child gate is the same or almost the same as that of the parent gate.