JPH081056B2 - Vertical gate opening gauge - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vertical gate opening gauge used for dams, weirs, waterways and the like.

[0002]

2. Description of the Related Art Conventionally, a vertical gate is known as one of the gates used for dams, weirs, waterways and the like. That is, in this vertical gate, a gate-shaped gate, for example, is provided between the left and right side walls so as to be vertically movable, and the gate is moved from the lower limit to the upper limit via a wire to the celsin motor. The amount of water is adjusted by raising the opening according to the rotation speed of the celsin motor.

[0003]

By the way, since the opening degree in the above-mentioned conventional vertical gate is set by the rotation speed of the Celsin motor, an error of about 3% is caused by the influence of the wire elongation and the fluctuation of the wind pressure. However, there is a problem that the accuracy of the opening degree is poor due to the occurrence of.

The object of the present invention is to improve the accuracy of the moving amount of the gate regardless of the influence of the elongation of the wire and the fluctuation of the wind pressure in order to improve the above-mentioned problems, and the mounting is simple and there is no failure. It is to provide a vertical gate opening meter.

[0005]

To achieve the above object, the present invention provides a vertically movable gate between left and right side walls of a dam, a weir, a waterway, etc. The upper part of the inner pipe is fixed to the portion, and an outer pipe that is slidable in the vertical direction with respect to the inner pipe in synchronization with the gate is provided on the outer peripheral part of the inner pipe, and liquid is provided above the inner pipe. An upper part of the enclosed spiral detection tube was attached, the detection tube was filled in the inner pipe and the outer pipe, and a pressure sensor was provided on the lower part of the detection tube to construct a vertical gate opening meter.

[0006]

By employing the vertical gate opening degree meter of the present invention, when the vertically movable gates on both left and right side walls are raised from the lower limit to the upper limit, the gate is raised. The outer pipe is slid upward with respect to the inner pipe in synchronization with. Then, the length l of the detection pipe 31 changes as the spiral detection pipe filled in the inner pipe and the outer pipe contracts. Based on the change in the length l of the detection pipe 31, a pressure sensor provided at the lower part of the detection pipe detects a change in pressure to accurately move the gate irrespective of the influence of wires or wind pressure fluctuations. That is, the amount of water is detected.

In addition, the opening meter includes inner and outer pipes,
As it is composed of a detector tube and a pressure sensor, it is easy to install and there is no failure.

[0008]

Embodiments of the present invention will be described below in detail with reference to the drawings.

Referring to FIGS. 1 and 2, a dam, a weir,
Side walls 3R and 3L made of, for example, concrete are erected at appropriate intervals on both sides of a bottom wall 1 made of, for example, concrete in a water channel or the like. Support members 5R and 5L extending vertically are attached to the upper portions of the side walls 3R and 3L. The bearing 7 is provided above the supporting members 5R and 5L.
R and 7L are provided.

A rotatable shaft 9 extending in the left-right direction in FIG. 1 is supported by the bearings 7R and 7L. A drive motor 13 such as a servo motor is interlockingly connected to a right end of the shaft 9 in FIG. 1 via a transmission device 11 including a sprocket and a chain. The drive motor 13 is provided with a position detector 15 such as an encoder, and the drive motor 13 is attached to the side wall 3R via a motor base 17.

For example, as shown in FIG. 2, the left and right side walls 3R and 3L have grooves 19 each having a U-shaped cross section.
R and 19L are formed by extending in the vertical direction. A gate-shaped gate 21 is vertically movably provided in the grooves 19R and 19L. A plurality of parallel wires 23, for example, are connected to the upper portion of the gate 21 and the shaft 9, and the gate 21 is suspended by the wires 23.

With the above structure, when the drive motor 13 is driven, the shaft 9 is rotated in one direction via the transmission device 11 and the wire 23 is wound around the shaft 9, so that the lower surface of the gate 21 is shown in FIG. Bottom wall 1 as shown
It comes in contact with the upper surface of and is raised from the lower limit of the solid line state (fully closed state) to the upper limit of the two-dot chain line state (fully closed). Further, by rotating the shaft 9 in the opposite direction, the gate 21 is lowered from the fully open state to the fully closed state. In this way, the gate 21 is moved up and down from the fully closed state to the fully opened state, and the amount of water flowing is adjusted.

As shown in FIG. 2, the gate 21 is provided with a door crossing portion 25, and at the ascending limit position of the gate crossing portion 25 of the gate 21, the circles and corners extending in the vertical direction are provided. The upper part of the inner pipe 27, which is made up of pipes and the like and whose bottom is opened, is fixed, and the lower part of the inner pipe 27 is made up of the round and square pipes attached to the gate 21, and the lower part is opened. It is inserted in the upper part of the closed pipe 29. That is, the outer pipe 29 is adapted to slide vertically along the outer peripheral portion of the inner pipe 27 in synchronization with the gate 21.

Inside the inner pipe 27 and the outer pipe 29, as shown in FIG. 3, there is provided a spiral detection pipe 31 in which a liquid such as water or oil is sealed, and this detection is performed. An upper portion of the pipe 31 is fixed to an upper portion of the inner pipe 29, and a pressure sensor 33 is provided below the detection pipe 31.

As shown in FIG. 4, a liquid L is enclosed in the spiral detection tube 31, and a pressure sensor 33 is provided below the detection tube 31. As the pressure sensor 33, the crystal type pressure sensor shown in FIG. 4 is used. Since the crystal type pressure sensor 33 itself is already known, the schematic configuration thereof will be described. The base plate 35 of the crystal type pressure sensor 33 will be described.
Are fixed to a support member (not shown) with a plurality of screws.
A vacuum case 37 is attached to the base plate 35, and a part of a support arm 41 is provided between the upper and lower bellows 39 of the vacuum case 37.

The upper bellows 39 has a spiral detector tube 31.
Are connected via a connection pipe 43, and the detection pipe 31
A fixed amount of liquid L such as water or oil is enclosed in the. A pipe 47 is connected to the lower bellows 39 via a connecting pipe 45, and internal pressure is applied to the lower bellows 39 from the pipe 47.

The support arm 41 is provided with a pivot 49, and a crystal oscillator 51 is provided on the right side surface of the support arm 41.

With the above structure, when pressure is applied to the pressure introducing port, the sum of the vertical pressure and the internal pressure of the liquid L is applied to the upper bellows 39 through the detecting tube 31, while the lower bellows is applied from the pressure introducing port side as described above. Internal pressure is applied to 39. Only the vertical pressure of the liquid L, which is the pressure difference, is transmitted to the crystal oscillator 51 by the support arm 41.

When a stress is applied to a vibrator, the quartz crystal changes its oscillation frequency linearly, so that the pressure can be directly converted into the frequency, so that the precision is high and the pressure can be measured as a digital quantity. The liquid L to be sealed in the detection pipe 31 is appropriately heat-treated to release the mixed gas, and then sealed in the detection pipe 31, the connection pipe 43, and the upper bellows 39 while being pulled directly. Is.
In addition, changes in liquid height due to temperature changes, vibrations, etc. are suppressed.

In FIG. 4, if the length l of the spiral detection tube 31 containing the liquid L is set, the crystal type pressure sensor 3
In 3, the pressure D is D = 1 / ρ (where ρ is the specific gravity of the liquid L) by setting the pressure gauge so that the indication value of the pressure gauge becomes zero when the gate 31 is fully closed. Will be calculated in. By detecting the pressure D, the opening degree, that is, the movement amount of the gate 21 is obtained in a linear relationship as shown in FIG.

FIG. 6 is a block diagram showing the construction of the opening meter of the gate 21. In FIG. 6, C in the control device
A crystal pressure sensor 33 and a counter are connected to the PU 53, and the pressure D and the gate 21 shown in FIG.
The setting unit 55, which sets the relationship with the movement amount of, is connected. An output unit 57 is connected to the CPU 53.

With the above structure, when the drive motor 13 is driven, the gate 21 ascends from the lower limit to the upper limit via the shaft 9, whereby the length l of the detection tube 31 is increased.
The pressure D is detected by the crystal type pressure sensor 33 based on the change of the above, and the drive motor 1 is based on the detected pressure D.
The amount of movement of the gate 21 is fed back to the position detector 3 of about 3%, for example, if the length l of the detector tube 31 is 1 m.
Within the error range of cm, the measurement can be performed accurately regardless of the influence of the fluctuation of the wire 23 or the wind pressure.

The pressure sensor 3 attached to the gate 21
The structural device 3 itself is also made up of the inner and outer pipes 27 and 29 and the spiral detection pipe 31, so that it is easy to mount and has no failure.

The present invention is not limited to the above-described embodiments, but can be implemented in other modes by making appropriate changes.

[0025]

As can be understood from the above description of the embodiments, according to the present invention, since the construction is as described in the claims, the movement amount of the vertical gate is controlled by the wire or wind pressure. It is possible to measure accurately within an error range of about 1% regardless of the influence of the above, and the installation is simple and there are few failures.

[Brief description of drawings]

FIG. 1 is a front sectional view of a vertical gate opening degree meter according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along the line II-II in FIG.

FIG. 3 is an explanatory view of a relationship between an inner pipe, an outer pipe, a spiral detection pipe, and a pressure sensor attached to a door crossing portion of a gate.

FIG. 4 is a detailed explanatory view showing a relationship between a spiral detection tube and a pressure sensor.

FIG. 5 is a relationship diagram showing a pressure D detected by a pressure sensor and a movement amount of a gate.

FIG. 6 is a configuration block diagram of a control device in the gate opening degree meter of the present invention.

[Explanation of symbols]

 1 Bottom wall 3R, 3L Side wall 9 Shaft 13 Drive motor 15 Position detector 21 Gate 25 Door crossing part 27 Inner pipe 29 Outer pipe 31 Detection tube 33 Pressure sensor 51 Crystal oscillator

Claims (1)

[Claims] 1. A vertically movable gate is provided between left and right side walls of a dam, a weir, a waterway, etc., and an upper portion of the inner pipe is fixed to a door-walking portion at the upper limit of the gate, and an outer periphery of the inner pipe is fixed. An outer pipe that is vertically slidable with respect to the inner pipe in synchronization with the gate is provided in the portion, and the upper part of the inner pipe is mounted with an upper portion of a spiral detection pipe in which liquid is sealed. Is filled in the inner pipe and the outer pipe, and a pressure sensor is provided below the detection pipe.