JPH04247110A - Apertometer for vertical type gate - Google Patents

Abstract

PURPOSE:To provide an apertometer which is simply mounted with few troubles in a vertical type gate while measuring the moving amount of a gate, i.e., detecting a water amount irrespective of influence from a wire or wind pressure with high accuracy within about 1% of error range. CONSTITUTION:The upper portion of an inner pipe 27 is fixed to a section 25 of a door crossing a gate 21, while an outer pipe 29 is provided on the outer periphery of the inner pipe 27. A spiral detecting pipe 31 sealing liquid L is provided in the pipes 27, 29 and the upper portion of the detecting pipe 31 is fixed to the upper portion of the inner pipe 27. A pressure sensor 33 is provided in the lower portion of the detecting pipe 31. Thus, pressure D is detected by the pressure sensor 33 according to a change in the length l of the detecting pipe 31 due to the lift of the gate 21 so that the opening of the gate is measured accurately on the basis of the pressure D.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to an opening meter for vertical gates used in dams, weirs, waterways, etc.

0002

2. Description of the Related Art Vertical gates have been known as one type of gates used in dams, weirs, waterways, etc. That is, in this vertical gate, a gate-like gate, for example, is provided between the left and right side walls so as to be movable up and down, and a cell thin motor is connected to the gate via a wire between the lower limit and the upper limit. The amount of water is adjusted by adjusting the opening degree according to the rotation speed of the Sershin motor.

0003

[Problems to be Solved by the Invention] By the way, since the opening degree of the conventional vertical gate mentioned above is determined by the rotation speed of the Sershin motor, there is an error of about 3% due to the effects of wire elongation, wind pressure fluctuations, etc. This caused the problem of poor opening accuracy.

An object of the present invention is to improve the accuracy of the movement of the gate regardless of the effects of wire elongation and wind pressure fluctuations, and to improve the above-mentioned problems by improving the accuracy of the movement of the gate, and by making the installation easy and trouble-free. The purpose of the present invention is to provide an opening gauge for vertical gates.

[0005]

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a vertically movable gate between the left and right side walls of a dam, weir, waterway, etc., and provides a doorway at the upper limit of the gate. The upper part of the inner pipe is fixed to the inner pipe, and an outer pipe is provided on the outer periphery of the inner pipe that can freely slide vertically with respect to the inner pipe in synchronization with the gate, and liquid is supplied to the upper part of the inner pipe. The upper part of the enclosed spiral detection tube was attached, the inner pipe and the outer pipe were filled with this detection tube, and a pressure sensor was provided at the lower part of the detection tube to constitute a vertical gate opening gauge.

[0006]

[Function] By adopting the vertical gate opening gauge of the present invention, when the gate, which is movable up and down on the left and right side walls, is raised from the lower limit to the upper limit, the gate will rise. In synchronization with this, the outer pipe is slid upward relative to the inner pipe. Then, the length l of the detection tube 31 changes as the spiral detection tubes filled in the inner pipe and the outer pipe shrink. Based on the change in the length l of the detection tube 31, the pressure sensor installed at the bottom of the detection tube detects the change in pressure, and the amount of movement of the gate with good accuracy is determined regardless of the influence of the wire or wind pressure fluctuation. In other words, the amount of water is detected.

[0007] Furthermore, as a position gauge, inner and outer pipes,
Since it consists of a detection tube and a pressure sensor, it is easy to install and eliminates failures.

[0008]

Embodiments Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

Referring to FIGS. 1 and 2, dams, weirs,
On both sides of a bottom wall 1 made of concrete, for example, in a waterway, side walls 3R, 3L made of concrete, for example, are erected at appropriate intervals. Support members 5R, 5L extending in the vertical direction are attached to the upper portions of the side walls 3R, 3L. Bearings 7 are mounted on the upper parts of the support 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 coupled to the right end of the shaft 9, for example in FIG. 1, via a transmission device 11 consisting of a sprocket, chain, etc. This drive motor 13 is equipped with a position detector 15 such as an encoder, and is attached to the side wall 3R via a motor base 17.

The left and right side walls 3R, 3L are provided with a groove 19R having a U-shaped cross section, for example, as shown in FIG.
, 19L are formed extending in the vertical direction. A door-like gate 21 is provided in the grooves 19R and 19L so as to be movable up and down. A plurality of parallel wires 23, for example, are connected to the upper part of the gate 21 and the shaft 9, and the gate 21 is suspended by the wires 23.

With the above configuration, 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 rotated as shown in FIG. Bottom wall 1 as shown
It comes into contact with the upper surface of the valve and is raised from the lower limit (fully closed state) shown by the solid line to the upper limit (fully closed) shown by the two-dot chain line. 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 between the fully closed state and the fully open state, and the amount of water flowing through the gate 21 is adjusted.

As shown in FIG. 2, the gate 21 is provided with a doorway section 25, and the doorway section 25 has a circle or corner extending in the vertical direction at the upper limit position of the gate 21. The upper part of the inner pipe 27, which is made of a pipe or the like and is open at the top and bottom, is fixed, and the lower part of the inner pipe 27 is made of a round or square pipe attached to the gate 21, with the upper part open and the lower part fixed. It is inserted into the upper part of the closed pipe 29. That is, the outer pipe 29 is slid in the vertical direction on the outer circumference of the inner pipe 27 in synchronization with the gate 21.

As shown in FIG. 3, a spiral detection tube 31 filled with a liquid such as water or oil is provided inside the inner pipe 27 and the outer pipe 29. The upper part of the tube 31 is fixed above the inner pipe 29, and a pressure sensor 33 is provided at the lower part of the detection tube 31.

As shown in FIG. 4, a liquid L is sealed inside the spiral detection tube 31, and a pressure sensor 33 is provided at the bottom of the detection tube 31. As this pressure sensor 33, a crystal pressure sensor shown in FIG. 4 is used. Since this crystal pressure sensor 33 itself is already known, its general structure will be explained.A base plate 35 of the crystal pressure sensor 33 is 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 bellows 39 provided above and below the vacuum case 37.

A spiral detection tube 31 is provided in the upper bellows 39.
are connected via a connecting tube 43, and this detection tube 31
A certain amount of liquid L such as water or oil is sealed in the container. 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 this pipe 47.

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

With the above configuration, when pressure is applied to the pressure inlet (2), the sum of the vertical pressure of the liquid L and the internal pressure is applied to the upper bellows 39 through the detection tube 31, while from the pressure inlet (2) side, the sum of the vertical pressure and the internal pressure is applied as described above. Internal pressure is applied to the lower bellows 39. Only the vertical pressure of the liquid L, which is the difference in pressure, is transmitted to the crystal resonator 51 by the support arm 41.

When stress is applied to the oscillator of a crystal, the oscillation frequency changes linearly, so pressure can be directly converted into a frequency, so the accuracy is high and pressure can be measured as a digital quantity. Note that the liquid L to be sealed in the detection tube 31 is subjected to appropriate heat treatment to release the mixed gas, and then sealed in the detection tube 31, the connecting tube 43, and the upper bellows 39 while being directly evacuated. It is. It also suppresses changes in liquid height due to temperature changes, vibrations, etc.

In FIG. 4, if the length of the spiral detection tube 31 filled with the liquid L is l, then the crystal pressure sensor 3
3, if the pressure gauge is set so that the reading on the pressure gauge is zero when the gate 31 is fully closed, the pressure D will be D=l・ρ (where ρ is the specific gravity of the liquid L) It will be calculated as follows. By detecting the pressure D, the opening degree, that is, the amount of movement of the gate 21 can be determined in a linear relationship as shown in FIG.

FIG. 6 shows a block diagram of the opening gauge 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 gate 21 shown in FIG.
A setting unit 55 is connected to which the relationship between the movement amount and the movement amount is set. Further, an output section 57 is connected to the CPU 53.

With the above configuration, when the drive motor 13 is driven, the gate 21 rises from the lower limit to the upper limit via the shaft 9, thereby reducing the length l of the detection tube 31.
The pressure D is detected by the crystal pressure sensor 33 based on the change in the drive motor 1 based on the detected pressure D.
The amount of movement of the gate 21 is fed back to the position detector No. 3, and the movement amount of the gate 21 is approximately 1%. For example, if the length l of the detection tube 31 is 1 m, the accuracy is within the error range of 1 cm, regardless of the influence of the wire 23 or the fluctuation of wind pressure. Can be measured well.

[0023] Also, a pressure sensor 3 attached to the gate 21
Since the structural device 3 itself is made up of the inner and outer pipes 27, 29 and the spiral detection tube 31, it is easy to install and has the advantage of being trouble-free.

It should be noted that the present invention is not limited to the embodiments described above, but can be implemented in other embodiments by making appropriate changes.

[0025]

Effects of the Invention As can be understood from the above description of the embodiments, according to the present invention, since the structure is as described in the claims, the amount of movement of the vertical gate can be controlled by wire or wind pressure. Regardless of the influence of factors such as these, it is possible to measure accurately within an error range of about 1%, and it is easy to install, and there are fewer failures.

[Brief explanation of the drawing]

FIG. 1 is a front cross-sectional view of an openness meter for a vertical gate according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along the line II-II in FIG. 1.

FIG. 3 is an explanatory diagram of the relationship between inner and outer pipes, a spiral detection tube, and a pressure sensor attached to the doorway section of the gate.

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

FIG. 5 is a relationship diagram showing the pressure D detected by the pressure sensor and the amount of movement of the 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　Toto Watari Department 27 Inner pipe 29 Outer pipe 31 Detection tube 33 Pressure sensor 51 Crystal resonator

Claims (1)

[Claims] [Claim 1] A vertically movable gate is provided between the left and right side walls of a dam, weir, waterway, etc., and the upper part of an inner pipe is fixed to the doorway at the upper limit of the gate, and the outer circumference of the inner pipe is fixed. An outer pipe is provided in the section that can slide vertically relative to the inner pipe in synchronization with the gate, and an upper part of a spiral detection tube filled with liquid is attached to the upper part of the inner pipe. An opening meter for a vertical gate, characterized in that the inner pipe and the outer pipe are filled with the above, and a pressure sensor is provided at the lower part of the detection tube.