JP2000226841A - Floodgate having inner/outer water level difference detecting device mounted on door body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To inexpensively provide information on an inner/outer water level difference with a simple structure by installing a detecting device for detecting the inner/outer water level difference on a door body. SOLUTION: An inner/outer water level difference detecting chamber 21 is arranged in a door body, the inside of the inner/outer water level difference detecting chamber 21 is partitioned into an inner water side water passing chamber 21b and an outer water side water passing chamber 21a in a water unpassing state by a movable piece 22, the inner water side water passing chamber 21b is put in a water passing state with the upstream side inner water side (a) of the door body, the outer water side water passing chamber 21a is put in a water passing state with the downstream side outer water side (b) of the door body, and the movable piece 22 can be freely moved by pressure by an inner/outer water level difference from the inner water side water passing chamber 21b or the outer water side water passing chamber 21a. A sensor 23 for detecting the inner/outer water level difference by being actuated by a movement of the movable piece 22 is arranged on the door body.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for detecting a difference between inside and outside water levels required for controlling a water gate (including a gutter) provided at a junction of small and medium rivers flowing into a large river. More particularly, the present invention relates to a sluice having an inner / outer water level difference detecting device mounted on a door body, which is provided with a detecting device for detecting the inner / outer water level difference on the door body so that information on the inner / outer water level difference can be obtained at low cost.

[0002]

2. Description of the Related Art Conventionally, a water channel (including a gutter gate) is provided in a water channel at a junction of small and medium-sized rivers flowing into a large river to prevent drainage and backflow. The sluice drains from the upstream small and medium river to the large downstream river, while preventing backflow from the large river to the small and medium river. Has a function. As described above, since the sluice gate serves as both drainage and backflow prevention, it is necessary to prevent the occurrence of backflow when opening and closing the door body.Therefore, it is necessary to detect the difference between the inside and outside water levels before opening and closing the door body. For this reason, various types of devices for detecting a difference between the inside and outside water levels are generally provided in this type of floodgate.

[0003]

Conventionally, an internal water level gauge is provided on the inland water side, and an external water level meter is provided on the external water side, and a method of performing calculations using a control panel, an internal / external water level difference meter, and the like are known. However, equipment prices, wiring, piping, and construction costs were expensive. In addition, the equipment configuration is complicated, and much labor is required for maintenance and adjustment.

The present invention has been made in view of the above problems, and has been made in order to solve the problems. An object of the present invention is to mount a detection device for detecting a difference between inside and outside water levels on a door body. To provide a water gate in which an inner / outer water level difference detecting device capable of obtaining information on the inner / outer water level difference with a simple structure and at a low cost is mounted on a door body.

[0005]

In order to achieve the above object, an invention according to claim 1 is provided with an inner / outer water level difference detecting chamber at a door of a floodgate installed in a water channel, and the inner and outer water level difference detecting chamber is provided. The interior of the room is separated into a non-water-permeable state by a mover between the inner water-side water passage chamber and the outer water-side water passage chamber, and the inner water-side water passage chamber is brought into a water-permeable state with the inner water side upstream of the door body. The water-side water passage chamber is in a water-permeable state with the outside water side on the downstream side of the door body, and the mover is made movable by the pressure due to the difference between the inside and outside water levels from the inside water-side water passage chamber or the outside water-side water passage chamber. And a means provided on the door body for detecting the difference in water level between the inside and outside by operating the movable element.

According to a second aspect of the present invention, an inside / outside water level difference detection chamber is provided vertically inside an inside / outside water level difference detection device mounting room provided on a door of a water gate installed in a water channel, and the inside / outside water level difference is provided. The detection chamber is vertically and non-water-permeable by a mover into an upper-side outer water-flow chamber and a lower inner-water-flow chamber, and the inner-water-flow chamber is located upstream of the door. Make the water flow state with the internal water side, make the external water side water flow chamber with the external water side downstream of the door body, and move the mover inside and outside the internal water side water flow chamber or the external water side water flow chamber. A movable rod that extends upward and downward is attached to the mover by the pressure caused by the water level difference, and a sensor that detects operation by contacting the upper end of the movable rod of the mover that moves upward is above the operating rod. It consists of means provided at the extension position.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described more specifically based on embodiments of the invention shown in the drawings. Here, FIG. 1 is a front view of the door body, FIG. 2 is a side sectional view of the door body, FIG. 3 is an enlarged plan view of main parts, and FIG. 4 is an enlarged cross-sectional view of main parts.

A door 1 of a floodgate installed in a waterway is provided with reinforcing beams of a vertical girder 1a and a horizontal girder 1b at predetermined intervals in a vertical direction and a horizontal direction, and a surface such as a steel plate or an FRP plate is provided on one side surface thereof. It is composed of a structure to which the face plate 1c is attached.
In this embodiment, the door 1 is mounted such that the side to which the surface plate 1c is mounted faces the inland water side a.

An inner / outer water level difference detection device mounting chamber 11 is provided at the lower center side of the door 1. The inside / outside water level difference detection device mounting chamber 11 is provided on the side where the reinforcing girder of the vertical girder 1a and the horizontal girder 1b is arranged, and is mounted so as not to protrude outside the reinforcing girder. It is installed so that it does not become an obstacle in case of

The inside and outside water level difference detection device mounting chamber 11 is
a, upper and lower horizontal girder 1b, auxiliary vertical girder 11a, and cover plate 11
The inner space is formed by b, and the inside / outside water level difference detection device 2 is provided inside the inside / outside water level difference detection device mounting chamber 11. The inside / outside water level difference detecting device 2 is protected by the inside / outside water level difference detecting device mounting chamber 11.

An inner / outer water level difference detector mounting chamber 11 in which the inner / outer water level difference detector 2 is provided is provided with an auxiliary vertical girder 11a vertically mounted at a position slightly apart from the central vertical girder 1a in the horizontal direction. , Central vertical beam 1a, upper and lower horizontal beam 1b,
1b and the auxiliary stringer 11a form a rectangular mounting frame, and a cover plate 11b is provided on the surface of the rectangular mounting frame, that is, the surface opposite to the surface plate 1c with the vertical and horizontal beams 1a and 1b therebetween. It is attached to form an internal space.

An inner / outer water level difference detecting chamber 21 constituting the inner / outer water level difference detecting device 2 is held by a horizontal holding plate 11c at a position slightly higher than the middle of the inner / outer water level difference detecting device mounting chamber 11. The horizontal holding plate 11c has a circular hole formed in the center thereof, and the inside / outside water level difference detection chamber 21 is provided in the horizontal holding plate 11c.
c is held in a state of penetrating. The outer peripheral side surface of the inside / outside water level difference detection chamber 21 and the horizontal holding plate 11c are in a watertight state.

The horizontal holding plate 11c is mounted horizontally so as to divide the inside of the inside / outside water level difference detection device mounting chamber 11 into upper and lower mounting chambers 11d and 11e in two vertical directions. The mounting chamber 11d and the lower mounting chamber 11e are in a non-water-permeable state together with a stopper 21c described later.
The upper mounting chamber 11d communicates with the outside water side b, and the lower mounting chamber 11e communicates with the internal water side a.

In other words, a part of the cover plate 11b that closes the upper mounting chamber 11d has an outer-water-side water hole 1 that communicates with the outer-water side b.
1f is formed. A dust screen 11g is attached to the outside water side water passage hole 11f to prevent dust from flowing into the upper attachment chamber 11d. Upper mounting room 11
“d” is in a water-permeable state with the outside water side “b” via the outside water-side water passage hole 11f to which the dustproof screen 11g is attached.

A part of the surface plate 1c that closes the lower mounting chamber 11e has an inner water side water hole 11h through which water flows to the inner water side a.
Are formed. A dust-proof screen 11i is attached to the inner water passage hole 11h, and dust is collected in the lower attachment chamber 1.
1e is prevented from flowing. The lower mounting chamber 11e is provided with a water inlet 11 on which the dust-proof screen 11i is mounted.
It is in a water flowing state with the inland water side a through h.

The inside / outside water level difference detecting device 2 simply detects the water level difference between an inland water side a, which is a small river on the upstream side of the door body 1, and an outside water side b, which is a large river downstream. Equipment for detecting the water level difference between the inside and outside, which is provided vertically,
The movable member 22 is configured to move vertically in the inside of the inside / outside water level difference detection chamber 21, and a sensor 23 is operated by the movable member 22.

The inside / outside water level difference detection chamber 21 is provided vertically in the center of the inside of the inside / outside water level difference detection device mounting chamber 11. The inside / outside water level difference detection chamber 21 has, for example, a hollow cylindrical shape, and the inside thereof is moved by a movable element 22 that moves up and down, and the inside of the outside water-side water passage chamber 21a on the upper side and the inside of the lower side. It is partitioned into a water-side water passage chamber 21b, and the outside water-side water passage chamber 21a and the internal water-side water passage chamber 21b are separated by the mover 22 in a non-water-permeable state.

An annular stopper 21c protrudes from the inner peripheral side of the upper / lower water level difference detecting chamber 21 to prevent the movable element 22 from moving further upward. This stopper 21c has a horizontal holding plate 1 at its base end.
1c. Inner / outer water level difference detection chamber 21
Is the upper cylinder 2 with the protrusion of the stopper 21c as a boundary.
1d and the lower cylinder 21e.

The lower end of the outer peripheral side surface of the upper cylindrical body 21d is fixed to the stopper 21c in a watertight state by welding. The upper end of the outer peripheral side surface of the lower cylindrical body 21e is fixed to an annular auxiliary connecting plate 21f in a watertight state by welding. The auxiliary connecting plate 21f is vertically connected to and fixed to the lower surface of the horizontal holding plate 11c in a watertight state by bolts in a state in which the auxiliary connecting plate 21f is vertically overlapped on the lower surface of the stopper 21c.

A cylindrical movable element 22 whose outer diameter is slightly smaller than the inner diameter of the inner / outer water level difference detection chamber 21 slides vertically in the hollow interior of the cylindrical inner / outer water level difference detection chamber 21. The interior is movably mounted. A float is used for the movable element 22 so that buoyancy is easily applied. The mover 22 is slightly heavier than the buoyancy exerted by its own weight.

The mover 22 partitions the inside of the inside / outside water level difference detection chamber 21 into a vertically non-water-permeable state. When the water pressure is higher than the water pressure in the water passage chamber 21a, that is, when the water level on the inner water side a is higher than the water pressure on the outer water side b, the water is moved upward by the water pressure difference,
In the opposite case, that is, when the water level on the inner water side a is lower than the outer water side b, it moves downward.

A vertically mounted inner / outer water level difference detection chamber 2
The upper and lower ends of 1 are open, and a water-permeable upper dust-proof net 21g and a lower dust-proof net 21h are respectively attached to the opened upper and lower ends. The outer water side water passage chamber 21a of the inside / outside water level difference detection chamber 21 is in a water passage state with the upper mounting chamber 11d via the upper dustproof net 21g.

Each of the upper dust-proof net 21g and the lower dust-proof net 21h has a circular small hole formed at the center thereof, through which the operating rod passes. Outside water passage room 21
a and a function of preventing the movable element 22 from moving in the vertical direction smoothly due to dust.

The opening surface at the lower end of the inner / outer water level difference detecting chamber 21 is slightly smaller than the diameter of the inner periphery at the lower end, and the lower end is formed in an annular shape, and the inner peripheral edge side is a closed edge surface. The lower edge of the movable element 22 that is movable downward is closely attached to the closed edge of the lower end of the inside / outside water level difference detection chamber 21, so that water tightness is enhanced.

At the center of the cylindrical movable element 22 in the vertical axis direction, the operating rod 22a is inserted through the movable element 22 in the vertical direction.
Is installed. The operating rod 22a extends in the up-down direction, and a sensor 23 for detecting operation by contacting the upper end of the operating rod 22a is provided at an upper extension position of the operating rod 22a.
Is provided. Operating rod 22 abutting on sensor 23
A cylindrical attachment 22b having an outer diameter larger than the operating rod 22a is attached to the upper end of the sensor a so that the sensor 23 can be reliably contacted.

For example, a proximity switch is used as the sensor 23, and the attachment 2 at the upper end of the operating rod 22a is used.
This proximity switch, which is in contact with 2b, is operated to detect the difference between the inside and outside water levels. The sensor 23 is attached to the horizontal beam 1b above the operating rod 22a so as to partially protrude downward. The sensor 2 on the upper side of the cross beam 1b
A protection cover 23a for protecting the sensor 3 is mounted on the upper side of the cross beam 1b to which the sensor 23 is mounted, so that it is prevented from getting wet with water.

Next, the operation based on the configuration of the embodiment of the present invention will be described below. The door 1 of the sluice gate (including the gutter gate) according to the present invention is normally stored at the upper limit position. At this time, buoyancy does not act on the movable element 22, and the movable element 22 is movable downward by its own weight. , Operating rod 2 of mover 22
2a is a non-contact state with the proximity switch of the sensor 23, and the proximity switch of the sensor 23 is in an OFF state.

When the flood level is detected by a separately provided water level gauge,
The floodgate door 1 is lowered to prevent backflow of the flood to the inland water side a.

Thereafter, the flood level further rises and the outside water side b
Is higher than the water level on the inner water side a, the water pressure in the outer water side water chamber 21a above the movable element 22 that is in water communication with the outer water side b is lower than that of the inner water side a. The movable element 22 is pressed by the water pressure from the upper side to the lower end side of the inner / outer water level difference detection chamber 21 because the movable element 22 is higher than the water pressure of the inner water passage chamber 21b on the lower side than the movable element 22 in the state. Since the lower end surface of the mover 22 is in close contact with the lower end surface of the inside / outside water level difference detection chamber 21, there is no risk of backflow through the inside / outside water level difference detection chamber 21.

When the flood level falls and the water level on the inland water side a becomes higher than the outer water side b, the water pressure in the inner water side water chamber 21 b below the movable element 22 that is in water communication with the inner water side a. Is the outer water side water passage chamber 2 above the movable element 22 that is in water communication with the outer water side b.
1a, the mover 22 moves upward. When the mover 22 moves upward, the attachment 22b at the tip of the operating rod 22a of the mover 22 contacts the proximity switch of the upper sensor 23, and the proximity switch is turned on.
, The sensor 23 detects that the water level on the inner water side a is higher than the water level on the outer water side b.

By receiving the information from the sensor 23 and opening the door 1 of the sluice, the water on the inner water side a can be quickly drained to the outer water side b.

It should be noted that the present invention is not limited to the above embodiment of the present invention, and it is needless to say that various modifications can be made without departing from the spirit of the present invention. For example, in the above embodiment of the present invention, the case where the inside / outside water level difference detection chamber 21 is provided in the vertical direction has been described. However, the present invention is not limited to this. For example, the chamber 21 may be provided in the horizontal direction. Alternatively, the mover 22 may move in the horizontal direction to activate the sensor 23.

[0033]

As is evident from the above description, according to the water gate having the inner and outer water level difference detecting device according to the first and second aspects of the present invention mounted on the door, the water pressure difference due to the inner and outer water level difference is utilized. The movable element can be moved, and the sensor can be operated by the movable movable element, so that the difference between the inside and outside water levels can be detected. In addition, a structure for achieving this can be realized with a relatively simple structure, and information on the water level difference between the inside and outside can be obtained at low cost.

In addition to the above, according to the second aspect of the present invention, the inside / outside water level difference detecting device is provided inside the inside / outside water level difference detecting device mounting chamber provided on the door body so that the inside / outside water level difference detecting device can be connected to the outside water side b. It has a very novel and beneficial effect, such as being prevented from being directly exposed to water, being prevented from being directly damaged by floating substances such as driftwood flowing on the outside water side b, and being able to prolong the life of the device. is there.

[Brief description of the drawings]

FIG. 1 is a front view of a door showing an embodiment of the present invention.

FIG. 2 is a side sectional view of a door showing the embodiment of the present invention.

FIG. 3 is an enlarged plan view of a main part showing the embodiment of the present invention.

FIG. 4 is an enlarged sectional view of a main part showing the embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Door body 1a Vertical girder 1b Horizontal girder 1c Surface plate 11 Inner / outer water level difference detector installation room 11a Auxiliary vertical girder 11b Cover plate 11c Horizontal holding plate 11d Upper installation room 11e Lower installation room 11f Outside water side water hole 11g Dustproof screen 11h Inner water side water hole 11i Dustproof screen 2 Inner / outer water level difference detector 21 Inner / outer water level difference detection chamber 21a Outer water side water chamber 21b Inner water side water chamber 21c Stopper 21d Upper cylinder 21e Lower cylinder 21f Auxiliary connecting plate 21g Upper dust-proof net 21h Lower dust-proof net 22 Mover 22a Actuating rod 22b Attachment 23 Sensor 23a Protective cover a Inner water side b Outer water side

 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Kenichi Hara 1013-1 Shintomi, Takayama-cho, Kimo-gun, Kagoshima In the Osumi Construction Office, Ministry of Construction (72) Inventor Hideo Kurozoe 4541, Matsuyama-cho, Uto-shi, Kumamoto Nishida Iron Works Co., Ltd. F term (reference) 2D019 AA44 BA04

Claims (2)

[Claims] An indoor / outdoor water level difference detection chamber is provided on a door of a sluice installed in a water channel, and the indoor / outside water level difference detection chamber is provided with a movable element between an internal water side water passage chamber and an external water side water passage chamber. Partition into non-water-permeable state,
Set the inland water passage chamber to the inflow water side on the upstream side of the door body,
The outside water side water passage chamber is made to be in a state of water communication with the outside water side downstream of the door body,
The movable element is made movable by the pressure due to the difference between the inner and outer water levels from the inner water passage chamber or the outer water passage chamber, and a sensor is provided on the door to operate the movable element to detect the inner and outer water level difference. A water gate having an inner / outer water level difference detection device mounted on a door body. 2. An inside / outside water level difference detection chamber is provided vertically inside an inside / outside water level difference detection device mounting room provided on a door of a water gate installed in a water channel, and the inside / outside water level difference detection chamber is located on an upper side. A movable element is used to partition the outer water passage chamber and the lower inner water passage chamber into a vertically non-water-permeable state with the mover, and the inner water passage chamber is flush with the inner water side upstream of the door. And the outer water-side water passage chamber is in a water-permeable state with the outer water side on the downstream side of the door body, and the mover is moved up and down by the pressure due to the difference in the inner and outer water levels from the inner water-side water passage chamber or the outer water-side water passage chamber. The movable rod is mounted with an operating rod extending upward, and a sensor for detecting operation by contacting the upper end of the movable rod of the movable element which is movable upward is provided at an upper extension position of the operating rod. A floodgate equipped with a featured inside / outside water level difference detection device on the door.