JPH0714414Y2 - Multi-stage roller gate - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial application field) The present invention relates to a multi-stage roller gate for arbitrarily drawing hot water on the surface layer, or water in the middle layer and bottom layer from an agricultural dam, a reservoir, or the like.

(Prior Art) Conventionally, the linear multi-stage roller gate has been mainly intended to mainly supply agricultural water by taking in warm water on the surface of the surface from reservoirs such as agricultural dams, reservoirs and lakes. In recent years, the long-term outflow of turbid water caused by the construction of dams and the outflow of cooling water have an adverse effect on local residents downstream of the dam.In addition to the conventional surface water intake function as a measure to prevent pollution, Selective water intake facilities have come to be installed that can also take water from the middle and bottom layers of the desired water temperature and quality.

For example, FIGS. 16 to 18 show a water intake gate 3 attached to a pair of concrete piers 2 protruding from a dam wall surface 1 into a reservoir. The intake range is between the highest water level a and the lowest water level b based on the highest water depth a ₀ and the lowest water depth b ₀ of the dam. The water intake gate 3 is normally provided by dividing the water intake range into 3 to 6. In this figure, the water intake gate 3 is composed of five doors 3a, 3b, 3c, 3d, 3e of the same size, which are slidably provided in a plurality of grooves 4 provided facing the concrete pier 2. Are connected to each other to form a single intake gate 3. In front of the intake gate 3, a lattice-shaped screen 5 is stretched over the intake 2a, and a discharge pipe 6 is arranged at the bottom of the dam wall 1 surrounded by concrete piers 2 and a water control gate is provided at the entrance. 7 is provided so as to be openable and closable. The water intake gate 3 and the water control gate 7 can be moved up and down by a switch 9 in a machine room 8 provided on the upper surface of the concrete pier 2.

At this intake gate 3, the door body 3
a, 3b, 3c, 3d, 3ee in order of curtain wall 10 side (10a)
By taking in, the entire water intake gate 3 can be contracted to take in the surface water, and if the whole is lifted to an arbitrary height, the water in the bottom layer can be taken in.

19 to 21 show an intake gate 11 disclosed in Japanese Utility Model Publication No. 62-35688, which is composed of three door bodies 11a, 11b, 11c. The door body 11b and the door body 11c have the same size, and the door body 11a
Is twice as large. The door body 11a can be lifted and lowered by the switch 12, the door body 11b and the door body 11c are connected so that the two lengths can be changed depending on the engagement position, and the door body 11a is hung by the switch 13 so as to be lifted and lowered. Since the door body 11a and the door body 11b can be separated from each other at the water intake gate 11, water in the middle layer can be taken in. Further, the water in the bottom layer can be taken by raising the entire intake gate 11.

The known intake gate 14 shown in FIGS. 22 and 23 is a door body 14a, 14
The b, 14c and 14d are arranged in a row by the connector 15, and the connector 15 can talk each door for a certain distance. Also, the door body
Switch 16 for raising / lowering 14a and switch for raising / lowering door 14d
17 are provided. When the switch 16 is actuated to raise the door 14a, the coupler 15 sequentially expands, and a gap is formed between the doors, so that water in the middle layer can be taken in.

(Problems to be solved by the invention) However, the water intake gate 3 shown in FIG. 16 only expands and contracts by each door body, and when water in the middle layer is taken in, the height of the water intake gate 3 is lowered to the middle layer area to take water. Must. For this reason, water in the surface layer also flows in, and strict water in the middle layer cannot be obtained. Further, since there are many grooves 4 for guiding the door bodies 3a, 3b, 3c, 3d, 3e, the construction cost and the maintenance cost increase.

In the intake gate 11 shown in FIG. 19, when it is desired to take the surface water, it may be necessary to temporarily discharge the cold middle water. That is, in FIG. 20, as the water surface becomes lower, the door 11b is lowered to take in surface water,
The height of the door body 11a is an obstacle and raises the door body 11a (
(Fig. 21). When the door body 11a is being raised, the surface layer discharge is interrupted, the water level in the reservoir rises, and when the door body 11a is separated from the door body 11b, the water in the middle layer is discharged. At the water intake gate 14 in FIG. 22, the water in the middle layer is discharged from the gap in which the connector 15 of each door extends. As shown in FIG. 23, when the water between the door bodies 14b and 14c is opened and water in the middle layer is taken in, the water overflows the door body 14a or is also discharged from between the door bodies 14a and 14b. And it's not just pure water in the middle layer.

In order to solve the above inconvenience, the present invention is a multi-stage type in which surface water can be continuously taken in even if the water level changes, and when water in the middle layer is taken in, other water levels are prevented from flowing in. It is intended to provide a roller gate.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides a first pair of piers having three door body grooves and one end groove provided with a stopper at the lower end. A third door having a door body attached thereto, the other end groove having a second door body provided with an overhanging plate for contacting the stopper from above at the upper end, and the center groove provided with a stopper at the lower end. A body is attached, a fourth door body is attached below the second door body, and a fourth door body is attached to the stopper of the third door body and hangs down from above, and two lifting devices are provided on the pier. , A drum having a rotation stopping function and a tensioning means having a tensioning device are provided, and the first door body and the second door body are hung by a wire that hangs the first door body and the second door body on one lifting device and the drum and the tensioning device. However, the other lifting device suspends the third door body.

(Operation) In the multi-stage roller gate configured as described above, the water intake of the surface layer causes the two lifting devices to work, and the pulling means is stopped to freely rotate the drum. While changing the height while connecting, the surface water is overflowed from the first door. That is, when lowering the overall height as the upstream water level becomes lower, the third door body is lowered and arranged side by side in the lateral direction of the fourth door body. Further, when the lower end of the second door body abuts the upper end of the fourth door body, the first door body is further lowered to the second door body.
Line the doors sideways.

Further, when the upstream water level becomes lower than the upper end of the second door body at this position, the pulling means is operated to raise and fix the second door body. In this position, the second door body and the fourth door body
There is a gap between the door and the door. Then, by moving down the first door body, the flowing water overflows the first door body and flows down from the gap.

Water in the middle layer is taken up by raising the second door body or lowering the third door body to open a gap serving as a water intake. Further, the tension means is operated to reverse the positional relationship between the first door body and the second door body, and a gap (water intake) can be formed between the second door body and the first door body. .

(Embodiment) An embodiment of the present invention will be described with reference to FIGS.

Intake gate 21 provided on dam wall 20 in Figs. 1 and 2.
Indicates.

A pair of concrete piers 22 project from the dam wall surface 20 into the reservoir, and a lattice-shaped screen 25 is fitted into the intake port 23 with the curtain wall 24 as a base. A discharge pipe at the bottom of the dam wall 20 surrounded by concrete piers 22
26 is provided, and a water control gate 27 is provided in the opening. The intake gate 21 is located behind the screen 25 and
The first door body 21a, the second door body 21b, the third door body 21c, and the fourth door body 21d, which have substantially the same height, are mounted in order from above.

A door is installed in the machine room 28 placed above the concrete pier 22.
Opening / closing device (elevating device) 29 for raising and lowering 21a, 21b and door bodies 21c, 2
An opening / closing device (elevating device) 30 for raising / lowering 1d is installed, and an opening / closing device 31 for raising / lowering the water control gate 27 is installed.

The door body 21a is attached to the groove 32a at the end of the three vertical grooves as a door stop formed on the concrete pier 22 so as to be able to move up and down, and the door body 21b is similarly installed at the other end. It is attached to the groove 32c. At the upper end of the door body 21b, the door body 21
A protruding plate 33 for preventing water leakage, which is in sliding contact with the wall surface of a, is attached, and a stopper 34 is attached to the lower end of the door body 21a. The wire 35 extending downward from the switch 29 is, as shown in FIG. 4, a pulley 36 provided at the upper end of the door 21a.
And is wound around a rotatable drum 37 provided in the upper part (machine room 28) several times, and further, through a pulley 38 provided at the upper end of the door body 21b, and is connected to a pulling device 39.

The door body 21c is vertically mounted in a central groove 32b among three vertical grooves as a door stop formed on the concrete pier 22, and the door body 21d is in sliding contact with the groove 32c.
It is mounted below b and can move up and down. And the door body 2
Stoppers 40 are provided at the lower end of the door body 21d and the lower end of the door body 21d, respectively, and the curtain wall 2 is provided at the lower end of the door body 21d.
An overhanging plate 41, which is in sliding contact with 4, is attached to prevent water leakage. In addition, the wire 42 extending downward from the switch 30
Is connected to the upper end of the door 21c.

The drum 37, which is a tensioning means, and the tensioning device 39 are shown in FIGS.
It will be described with reference to the drawings.

The drum 37 is rotatably provided by being rotatably mounted on the large gear 43, and a small gear 44 meshing with the large gear 43 is juxtaposed so as to be movable in the axial direction, and a shaft 45 of the small gear 44 is rotated by a stopper 46. Is suppressed. The tooth shapes 43a, 44a of the large gear 43 and the small gear 44 are formed in a pointed shape in the axial tip, a key groove 47 is formed between the small gear 44 and the shaft 45, and a key 48 with a spring is provided in the center.
Is stored. As a result, the small gear 44 can rotate with respect to the shaft 45, and the meshing of the gears can be facilitated.

The pulling device 39 pulls the wire 35, and when the rotation of the drum 37 is stopped and the wire 35 is fixed by friction with the drum 37, the door body 21b can be pulled higher than the door body 21a. is there.

A is the highest water level, B is the lowest water level, and 49 is a security gate. Further, the device for stopping the rotation of the drum 37 may be locked by a claw and is not limited to this device.

Next, the operation will be described.

At the time of surface water intake, if the water level is A1 (<A) shown in FIG. 8, the water intake gate 21 as a whole is lowered by operating the switches 29 and 30. The door body 21d is located behind the curtain wall 24, and the gap between the curtain wall 24 and the door body 21d is closed by an overhanging plate 41. The surface water overflows the door 21a and flows into the discharge pipe 26. Even if the door body 21d reaches the bottom, the water level is low and the intake gate 2
If it is difficult to flow over 1, lower the entire intake gate. Since the door body 21c slides while the stoppers 40, 40 with the door body 21d are separated from each other, there is no water leakage during this time. Even in this state, surface water overflows the door 21a. Also, the door body 21c
When the water level is low (A2) even when the door reaches the bottom and the door body 21b contacts the upper end of the door body 21d, the switch 29 is operated. Then, by lowering the door body 21a to lower the height of the water intake gate 21, surface water intake can be performed. You may change the descending order of the doors if you do not make a gap in each door.

In Fig. 10, if the water level A3 is lower than the water level A2, the drum
Fix 37 so that it does not rotate, and lock wire 35.
Then, the switch 21a is operated to lower the door 21a, and the tension device 39 is operated to raise the door 21b. As a result, the surface water overflows the door body 21a and flows into the discharge pipe 26 from between the door body 21b and the door body 21d. The door 21a is in a liquid-tight state in contact with the curtain wall 24, so that there is no water leakage and there is no mixing of water in the bottom layer. The same applies to water level A4 (<A3) in Fig. 11.

Next, with respect to the height of the water intake gate due to the rise of the water level from the minimum water level, the door body 21b is first fixed, and the lower end of the door body 21a is pulled up to the upper end of the curtain wall 24. When the water level further rises, the lower end of the door body 21b is brought into contact with the upper end of the door body 21c. At this time, the surface water overflows the doors 21a and 21b (Fig. 9). When the water level rises further, the door 21a
Gradually pull up to adjust the height of the intake gate 21. After that, make sure that there are no gaps between the doors so that the total height of the intake gate is large, and use the switches 29 and 30 to open the doors 21a, 21b, 2
Raise 1c, 21d (may be in any order).

In the case of middle layer intake, as shown in FIGS. 12 and 13, the door body 21
By opening the space between b and the door 21c and operating the switches 29, 30 to the water level A, water can be taken at any water level (A5, etc.).

Further, even when water is taken from the surface layer, if the water surface is contaminated with bubbles, oil, etc., the switch 29 is operated according to the change of the water level A, and the drum 37 and the tension device 39 are operated at any time to lower the lower end of the door 21a. Abut on the upper end of the door body 21c to move the door body 21b to the door body 21a.
Position above. In this way, surface water intake can be performed with the water surface removed.

Figure 15 shows bottom water intake. The intake gate 21 has a switch 29,3
By operating 0, the doors can be pulled up with the doors connected. There is a gap between the door 21d and the curtain wall 24, and the water in the bottom layer is discharged from here.

According to the present invention, water is taken from the surface layer, middle layer and bottom layer of the reservoir as described above.

If the curtain wall 24 is not formed, the overhanging plate 41 is not necessary, and the door body 21 in FIG.
The a is in liquid-tight contact with the door 21c.

(Effect of the Invention) Since the present invention is configured as described above, it is possible to reverse the vertical position of the height position of the first door body and the second door body by the pulling means. Since the third door body is mounted between the first door body and the second door body, the contact with the third door body is maintained even in the reversed state. Utilizing this, surface water can be continuously taken from high water level to low water level. Further, also in the middle-layer water intake, since the water intake can be formed in the central portion or above the central portion, strict middle-layer water intake can be performed. Further, even if the upstream water level changes during water intake, it is possible to prevent water from flowing from other layers and continuously perform water intake from a desired layer.

Also, since the second door body and the fourth door body are incorporated in one of the grooves that are the guides for raising and lowering the door body, the number of grooves can be small, and construction work and security work can be reduced. The maintenance cost can be reduced.

[Brief description of drawings]

FIG. 1 is a sectional view of the multi-stage roller gate of the present invention, FIG. 2 is a plan view of the multi-stage roller gate of the present invention, FIG. 3 is a side view of the intake gate, and FIG. 4 is a lifting mechanism for the upper stage of the intake gate. 5 is an explanatory view showing a wire locking mechanism in the upper stage of the intake gate, FIG. 6 is a cross-sectional view of a small gear for locking, FIG. 7 is a cross-sectional view taken along the line I-I of FIG. 6, 8 to 11 are explanatory views of surface water intake, FIGS. 12 and 13 are explanatory diagrams of middle layer intake, FIG. 14 is an explanatory view of surface layer intake, and FIG. 15 is an explanatory view of bottom layer intake, FIG. 16 is a sectional view of a conventional multi-stage roller gate, FIG. 17 is a front view of FIG. 16, FIG. 18 is a plan view of FIG. 16, and FIGS. 19 to 21 are conventional three-stage water intakes. FIG. 22, FIG. 22 and FIG. 23 are explanatory views of a conventional intake gate provided in series. 21a, 21b, 21c, 21d …… Door 29, 30 …… Lifting device (switch) 37 …… Drum 39 …… Tension device

Claims (1)

[Scope of utility model registration request] 1. A pair of piers are provided with three door body grooves, and one end groove is fitted with a first door body having a stopper at the lower end, and the other end groove is provided with the stopper. A second door body provided with an overhanging plate that contacts from above is attached at the upper end, a third door body provided with a stopper at the lower end is attached in the central groove, and below the second door body, A fourth door body is attached to the stopper of the third door body and hangs down from above, and a pulling means having two lifting devices, a drum with a rotation stop function, and a pulling device is mounted on the via. Provided, the first door body and the second door body are hung on one lifting device, the drum, and the tensioning device by a wire hanging in a W shape, and the other lifting device hangs the third door body. A multi-stage roller gate that is characterized by that.