JPS6242970Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a surface water intake gate that is installed in a dam or the like to take in warm water or fresh water in the surface layer of accumulated water and allow it to flow downstream.

In general, surface water intake gates use a system that electrically captures changes in water level using a water level gauge, etc., and sends commands to the hoisting machine to hoist and lower the gate, causing the gate body to follow the changes in the water level. However, in order to avoid mechanical errors and frequent opening and closing of the motor, a dead band must be provided in the width that electrically captures water level fluctuations, so the gate moves in a step-like manner in response to water level fluctuations. Therefore, it is impossible to completely follow changes in water level.

For example, in the case of a cylinder gate, a hoist is operated to raise and lower the gate body according to fluctuations in water level.
This system attempts to take in water from the surface layer, but if you try to take in water in a thin layer continuously, the hoisting machine will start and stop frequently, which will significantly shorten its life and also cause the hoisting machine to start and stop frequently. When considering errors in protection and water level gauges, as mentioned above, a dead zone must be provided for the operation commands of the water level gauge and hoisting machine. Therefore, it is unsuitable for cases where the amount of water intake is small, or especially when attempting to draw water from a thin surface layer. In addition, in the case of floating gates, all gates except the bottom door are equipped with floats that are proportionate to the weight of the gates, in order to always maintain a constant amount of surface water in response to fluctuations in water level. However, it is necessary to install a hoisting machine for maintenance and inspection, and since it has a large float corresponding to the total weight of the door body, the hoisting load is large, and the equipment is oversized considering the infrequent use. However, the weight is larger than that of a cylinder gate.

The present invention was developed with the aim of eliminating the above-mentioned drawbacks of the prior art, that is, it does not move step-like like a conventional cylinder gate in response to changes in the water level of stored water. , which moves in a straight line and maintains a constant intake depth at all times.
In addition, the overlapping distance with the first stage door, that is, the automatic adjustment stroke, can be selected to the optimal value according to the dead zone stroke or the water level fluctuation of the dam.
In addition, it is possible to significantly reduce the operating frequency of accessory parts such as the hoisting machine, motor, and switch, thereby extending the life of the entire equipment. The object of the present invention is to provide a surface water intake gate that requires a smaller float than the floating gate of the present invention.

For this reason, the configuration of the surface water intake gate of the present invention is as follows:
It has a lifting beam that is moved up and down by a hoisting machine via a wire rope, a second stage door that is suspended by the lifting beam via a connecting hardware consisting of a tension rod, and a drinking spout. a first-stage door located between the lifting beam and the second-stage door, and a first-stage door located below the lifting beam and above the first-stage door. a rectifying board integrally coupled with the first stage door and provided so as to be movable up and down using the connecting hardware as a guide; The rectifying plate has a buoyancy equal to the sum of the weights of the water, and is floating on the surface of the water so that it slides up and down following changes in the water level of the water. It is said that

An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, 1 is a hoisting machine, 2 is a wire rope, 3 is a sheave, 4 is a lifting beam that is moved up and down by the hoisting machine 1 via a wire rope 2, and 5 also serves as a float, which will be described later. 6 is a first-stage door having a bellmouth-shaped spout, and 7 is a second-stage door provided below this.

That is, as shown enlarged in FIG. 2, the rectifying panel 5 is located above the first stage door 6,
Moreover, the vertical distance between the rectifier panel 5 and the first stage door 6 is as follows:
A certain degree of manual adjustment is possible, and the rectifying panel 5 and the first stage door 6 are integrally connected. Further, the rectifier plate 5 is provided with a buoyancy that balances the sum of the weight of the rectifier plate 5 and the weight of the first stage door 6, so that it also functions as a float. Next, a connecting arm 9 is provided on the second stage door 7, and the lifting beam 4 and the second stage door 7 are connected by a connecting hardware 8 made of a tension rod, and the wire rope 2 is hoisted and By lowering, the lifting beam 4 is moved up and down, and mechanically, the doors from the second stage door 7 onwards are moved up and down. In other words, the rectifying panel 5 and the first stage door 6 have a structure that is free in the vertical direction with respect to the lifting beam 4 and the second stage door 7.
Therefore, since the rectifier plate 5 has the above-mentioned buoyancy and is placed in a floating state on the water surface of the reservoir water, the connecting hardware 8 is moved together with the first stage door in response to changes in the water level of the reservoir water. It is designed to move up and down by a slide section 10 that serves as a guide. Note that 11 seen in Figure 2
is a watertight area.

In the surface water intake gate configured in this way, when the water level of the accumulated water is indicated by the reference numeral 12 as shown in the left diagram of FIG. 3, the rectifier plate 5 floats to the water level 12. The first stage door 6 is capable of surface water intake at a water intake depth h (vertical distance between the rectifying panel 5 and the first stage door 6). Now, as shown in the left to middle diagrams of Figure 3, when the water level fluctuates from 12 to 13, all the doors below 2nd stage door 7 do not move, and the rectifier plate 5 changes to 5. As shown by ', only the rectifier plate 5 and the first stage door 6 move up and down following the water level fluctuations while keeping the water intake depth h constant. In other words, in response to changes in the water level within the interval of the automatic adjustment stroke s, the doors below the second stage door do not move at all, that is, the hoisting machine does not operate at all, and a constant surface water intake is maintained. It becomes possible. However, when the water level drops below 13 and below the water level indicated by 14 in the right-hand diagram of FIG. Lower the entire door in this way. Of course, if the water level rises above the position indicated by reference numeral 12 in the left diagram of FIG. 3, the hoisting machine is operated to raise the entire door. That is, only when the water level fluctuates further than the automatic adjustment stroke s, the entire door is raised and lowered by operating the hoisting machine 1 shown in FIG. 1. Note that it is desirable that the amount of vertical movement of the lifting beam 4 by the hoisting machine 1 be limited to a range from about half to about the same as the automatically adjusted stroke s.

As described above, the surface water intake gate of the present invention has a second stage door suspended by a lifting beam via a connecting hardware consisting of a tension rod, and a spout that connects the lifting beam to the second stage door. a first stage door provided to be located between the two stage doors; and a first stage door located below the lifting beam and provided above the first stage door and integrally coupled with the first stage door. and a rectifier plate having a buoyancy equal to the sum of the weight of the rectifier plate and the weight of the first stage door, and furthermore, the rectifier plate has a buoyancy that is balanced with the sum of the weight of the rectifier plate and the weight of the first stage door. Since the rectifying plate is placed floating on the surface of the pooled water so that it slides, it does not move stepwise like a conventional cylinder gate in response to changes in the water level of the stored water, but instead moves in a straight line. The straightening board moves up and down using the connecting metal fittings as a guide, so that the linear movement of the straightening board is extremely smooth, and the first stage The overlap distance with the door, that is, the automatic adjustment stroke can be selected to the optimum value according to the dead zone stroke or the water level fluctuation of the dam, and the hoisting machine, motor, and switch that move the lifting beam up and down can be used. The operating frequency of accessory parts such as The effects of this invention are extremely large, such as the small size of the device.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; Fig. 1 is a front view, Fig. 2 is an enlarged view of part A in Fig. 1, and Fig. 3 is an enlarged view of part A in Fig. 1.
The figure is an explanatory diagram of the action. 1... Hoisting machine, 2... Wire rope, 3... Sheave, 4... Lifting beam, 5... Float-duty rectifier board, 6... First stage door, 7... Second stage door, 8 ... Connecting hardware, 9... Connecting arm, 10... Slide part, 11... Watertight part.

Claims (1)

[Scope of utility model registration request] It has a lifting beam that is moved up and down by a hoisting machine via a wire rope, a second stage door that is suspended by the lifting beam via a connecting hardware consisting of a tension rod, and a drinking spout. a first-stage door located between the lifting beam and the second-stage door, and a first-stage door located below the lifting beam and above the first-stage door. A rectifying panel is provided which is integrally connected to the first stage door and is movable up and down using the connecting hardware as a guide, and the rectifying panel includes a weight of the rectifying panel and a weight of the first stage door. The rectifying plate has a buoyant force that is in balance with the sum of the weights, and is placed in a floating state on the surface of the water so that it slides up and down following changes in the water level of the water. surface water intake gate.