JP3300959B2 - Gate switchgear - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gate opening / closing device in which a door body rises and lowers in conjunction with a float, and more particularly to a float opening / closing device, in order to uniformly store water separation and drainage. The present invention relates to a gate opening / closing device that allows a door to move smoothly without increasing a plane area.

[0002]

2. Description of the Related Art Generally, in opening / closing operation of a gate provided in a waterway, an operating force when a gate body of a gate starts to move is relatively large because it resists static friction resistance. In this case, the magnitude of the operating force is reduced to about 60% because of the resistance to the kinetic friction resistance. For example, regarding the gate where the float and the door are linked,
If the water level in the float chamber rises by 10 cm and the gate starts to open, the float must stop at least 4 cm before it stops. As a result, the water level upstream of the gate becomes too low, so that the gate continues to close. Therefore, the ascending and descending operation of the gate does not match the change in the upstream water level, and the gate repeats ascending and descending, causing a phenomenon called so-called hunting. In an extreme case, there is a problem that overflow occurs.

[0003] Therefore, as shown in FIG.
-173532), door 3 of gate 2 provided in waterway 1
Is provided so as to be openable and closable via the rotating shaft 4, the float arm 5 is fixed to the rotating shaft 4, and the float 7 accommodated in the float chamber 6 is connected to the float arm 5. The gap between the float 7 and the peripheral surface of the float 7 is reduced as much as possible, the plane area of the float 7 is made sufficiently large, and the float arm 5 for suspending the float 7 It is to be. In addition, the upstream flowing water is introduced into the float chamber 6 through a water injection tank 8 and a water injection pipe 9 provided on the upstream side of the gate 2. A counterweight of 10 is provided at the downstream end of the arm 2a.
Is installed.

When the gate 2 is opened, the movement of the float 7 accompanying the operation of the door 3 is small, and when the float 7 rises slightly, the water surface of the float chamber 6 falls and the operating force acting on the float 7 disappears. Then, a braking force is applied to reduce the movement of the door body 3 at one time, and the door body 3 operates smoothly to prevent hunting.

In the above structure, when the float 7 moves up and down, the float 7 moves at a position on a plane in the float chamber 6, so that the float area increases. In addition, since there is no means for regulating the attitude of the float 7, it is necessary to increase the weight so that the float 7 sinks. Therefore, as shown in FIG.
No. 0476), the float 7 is suspended by a float arm 11 having an involute curved groove 11a, and the planar position and posture of the float 7 are adjusted by a pair of upright guide rods 12 fixed to the bottom surface of the float chamber 6. A regulatory configuration was proposed.

[0006]

However, the following problems still remain in the above configuration.
First, since the dimensions of the concrete float chamber 6 are inaccurate, there is a limit in reducing the gap between the float chamber 6 and the float 7, and therefore, in order to reduce the movement of the gate 2, That is, it is necessary to make the size of 7 several times larger to obtain the required operating force.

Second, the involute curved groove 11
When the float arm 11 having a is used, there are four fulcrum points above and below the pair of guide rods 12 and five points of the float arm 11. Also, since the height of the guide rod 12 and the float arm 11 are significantly different, the bending moment increases, and the float 7 bites, so that the gate 2 interlocking with the float 7 does not open and close smoothly. 1 means that the water level is not stable.

The present invention supplements the dimensional accuracy of the float chamber,
It is another object of the present invention to provide a gate opening / closing device that smoothly guides a vertical movement of a float.

[0009]

According to the present invention, in order to achieve the above object, a gate door is provided so as to be openable and closable over the width of a water channel, and flowing water upstream of the door is drawn in through a water injection pipe. housing the float to the float chamber, the inner in the switchgear of gates is associated with said with said float door body, always within the float chamber, the portion which is located in the water, a watertight rubber
The watertight rubber is mounted so as to protrude from the wall, and the tip of the watertight rubber is brought into close contact with the peripheral surface of the float.

In the above structure, the float is suspended from a float arm having a groove having an involute curve via a roller sliding in the groove, and is mounted on a fixing plate mounted at an upstream position of the float chamber. A guide rod is set up vertically, and a connecting member erected on the upper surface of the float is slidably supported in the vertical direction on the guide rod.

[0011]

According to the first means having the above construction, even if the position of the float on the plane is slightly changed, the gap between the float and the float chamber is small, and the watertight rubber is attached between the floats. Will always be in close contact with the float. In addition, since water can be prevented from instantaneously passing through the gap with the watertight rubber, the water surface of the float chamber does not change suddenly as the float moves up and down. Can be blocked.

The problem of the magnitude of the gate movement is that
This is the case where the gate opening is extremely small. When the water level in the float is low and thus the head of the float chamber is low, the water level fluctuates as the float moves up and down in the water injection pipe where only the upstream side has a free water level. Therefore, if the float rises and falls slightly, the water level in the irrigation pipe changes drastically,
The water pressure in the float chamber changes instantaneously, and a braking force is applied to the float.

Therefore, the magnitude of the movement of the gate per operation is independent of the size of the gap between the float chamber and the float, and is determined solely by the ratio of the plane area of the float to the cross-sectional area of the injection pipe. The length can be reduced to a fraction of the conventional value.

Further, by the second means, involute curve rotating operation of the vertical movement and the float arm of the float
Since the Jo groove is transmitted through the rollers to slide, furo
The contact position between the groove and the roller according to the pivoted position of the port arm
The position changes, allowing the float to move vertically. In addition, since the connecting member is slidably mounted on the guide rod, the float is positioned on a plane at two points, horizontal movement is regulated , and when the float moves up and down,
Rolling is eliminated, and the tip of the watertight rubber is
Good adhesion.

[0015]

Embodiments of the present invention will be described below with reference to the accompanying drawings. As shown in FIG. 2, a door 3 of the gate 2 is provided over the entire width of the water channel 1, the door 3 is attached to the upstream end of a pair of arms 2a, and the pair of arms 2a are arranged in the width direction of the water channel. It extends along the canal 1. A pair of arms 2a
Is fixed to a rotating shaft 4, and the rotating shaft 4 is rotatably supported by a side wall 1 a of the water channel 1. A counterweight 10 is attached to a downstream end of the arm 2a.

An operation block 13 is provided on the side of the water channel 1, and the rotating shaft 4 of the gate 2 extends to a drainage chamber 14 of the operation block 13, and the float arm 11 protrudes upstream at this position and is fixed. Have been. An involute curved groove 11a penetrating in the water channel width direction and extending in the water channel length direction is cut off at the tip of the float arm 11 (see FIG. 1), and the roller 15 is loosely fitted into the groove 11a. Both ends are suspended plates 16 erected on the upper surface of the float 7 accommodated in the float chamber 6.
It is supported by. The operation block 13 includes a water supply chamber 17,
The water supply chamber 17 and the drainage chamber 14 are divided into a float chamber 6 and a drainage chamber 14, and a water supply port 18 and a drainage port 19 communicating with the water channel 1 are provided in the water supply chamber 17 and the drainage chamber 14, respectively.
Is provided.

A fixing plate 20 is mounted on the upstream side of the float chamber 6 in the width direction. On the fixing plate 20, a guide pipe (guide rod) is located vertically on the center line between the upstream and downstream of the float 7.
The guide pipe 21 faces the upstream side of the float arm 11. A connecting member 22 is provided upright on the upper surface on the upstream side of the float 7, and a pair of bearings 23 provided on the connecting member 22 loosely fits a guide pipe (guide rod) 21.

As shown in FIG. 1, the bearing 23 is arranged so as to be substantially vertically symmetrical about the height of the roller 15,
The flat position of the float 7 is maintained against the running resistance of the roller 15. Further, the interval between the bearings 23 is made sufficiently large in consideration of the friction coefficient so that the bearing 23 does not bite when a person rides on the end of the float 7.
Further, a counterweight 24 that opposes the weight of the bearing 23 and the connecting member 22 is mounted on the upper surface on the downstream side of the float 7.

The float chamber 6 accommodates a float 7,
The float 7 is floated by flowing water, and the side wall of the float chamber 6 is naturally divided into a portion that comes into contact with air and a portion that is submerged in water. As shown in FIG. 1, a pair of watertight rubber 25 is placed on the inner wall of the
The front ends of the watertight rubber 25 facing the center of the float chamber are bent upward and downward, respectively, so that both ends are obliquely adhered to the peripheral surface of the float 7.

The interior of the float 7 is formed by a lower sealing portion 7a.
The water guide 7b is connected to the drainage chamber 14 via a flexible tube 26 attached to the lower end of the float 7. A hole 27 is formed in the upper surface of the float 7, and the water guide 7b is communicated with the outside air.

The inside of the float chamber 6 communicates with the water channel 1 upstream of the gate 2 via a water injection tank 8 composed of a weir provided in a water supply chamber 17 and a water injection pipe 9, and is formed on the upstream side wall surface of the drain chamber 14. It communicates with the water channel 1 downstream of the gate 2 via an outlet 28 consisting of small holes.

Next, the counterweight 10 will be described. The position and weight of the counterweight 10 are set such that the center of gravity of all the pivoting portions of the door body 3 is located at an obliquely upper position on the upstream side of the pivot shaft 4. When the heads are equal, the door 3 is adjusted so that the eccentric force closes the door 3 properly regardless of the opening degree of the gate.

In addition, the water head in the float chamber 6 is
The area of the float 7 is determined so that the door 3 is opened by overcoming the eccentric force when it is equal to the upstream side. In addition, the area of (overflow water depth × perimeter) of the water injection tank 8 is sufficiently larger than the cross-sectional area of the outlet 28. The overflow water depth will be described later.

Next, the operation will be described. First, the operation of the gate 2 as a premise of the present invention will be described. When the water level in the water channel 1 upstream of the gate 2 rises, the amount of flowing water flowing from the injection tank 8 through the injection pipe 9 into the float chamber 6 increases, and the water level above or above the injection pipe 9 in the injection tank 8 upon inflow. Rises. For this reason, the water pressure in the float chamber 6 rises, so that the float 7 rises and the gate 2 opens.
If the water level in the upstream water channel 1 decreases, the float chamber 6
The amount of water flowing into the inside of the float chamber 6 decreases, the water pressure in the float chamber 6 decreases, and the gate 2 closes due to the eccentric force.

Needless to say, the overflow water depth when the gate 2 is opened and the overflow water when the gate 2 is closed are different, but since the perimeter of the water injection tank 8 is sufficiently large, the normal overflow water depth is small, and the overflow water depth change amount is small. Therefore, the water level upstream of the gate 2 is almost constant.

Next, the operation of the structure according to the present invention will be described. The flat position of the float 7 is the guide pipe 21
, The tip of the watertight rubber 25 is in close contact with the periphery of the float 7. In addition, since the position of the watertight rubber 25 is a deep portion that is always in the water, the vicinity of the watertight rubber 25 is filled with water that is difficult to pass, not air that is easy to pass. The problem that the gate 2 moves too much is an instantaneous phenomenon. Therefore, since the water level in the float chamber 6 cannot fluctuate as the float 7 moves up and down, the gap in the float chamber 6 does not have to be forcibly reduced.

Since the water surface in the float chamber 6 does not fluctuate as the float 7 moves up and down, the water surface rises and falls only when the water filling tank 8 is used.
However, the size of the movement of the gate 2 becomes a problem only when the opening of the gate 2 is small. Therefore, the flow rate is extremely small, and the water level in the downstream water channel 1 and the float 7 is very low. Therefore, since the head in the float chamber 6 is also low, the free water surface in contact with the atmosphere is:
Only in the irrigation pipe 9, which has a very small area.

Therefore, if the float 7 rises and lowers slightly, the water level in the injection pipe 9 fluctuates greatly in the direction opposite to the movement of the float 7, the water pressure in the float chamber 6 changes drastically, and the operating force of the float 7 decreases. It disappears, and the braking force is applied. Therefore, the float 7 and the door 3 are prevented from moving significantly. Conventionally, since the water level in the float chamber 6 fluctuates according to the elevation of the float 7, the size of the float 7 is adjusted to obtain a required operating force in order to reduce the movement of the gate 2 per stroke. Had to be several times the area of
Since the water pressure in the float chamber 6 is used, the flat area of the float 7 is reduced to a fraction of the conventional area, so that restrictions on the installation location and manufacturing costs can be reduced.

However, if there is a sudden increase in water level, such as flash flood, the volume of the portion of the float chamber 6 below the watertight rubber 25 is constant, so that the gate 2 opens rather rapidly. Further, since the water of the downstream water channel 1 is introduced into the water guide 6b above the float 7, the height of the water surface inside the float 7 does not change even when the float 7 moves up and down. Therefore,
If the increase in the flow rate and the rise in the water level in the upstream waterway 1 continue, the increase in the amount of inflow into the float chamber 6 will continue.
The gate 2 continues to open without losing the operating force acting on the gate.

A pair of bearings for loosely fitting the guide pipe 21
The float 23 supports the float 7 so that the horizontal rotation and the vertical sliding can be freely performed. The float arm 11 regulates the horizontal rotation and the vertical sliding.
Therefore, since the attitude of the float 7 does not change due to the buoyancy, the tip of the watertight rubber 25 is in close contact with the float 7 and its action is ensured. Further, since the posture of the float 7 is regulated, it is not necessary to forcibly increase the weight of the float 7, and the counterweight 10 is also lightened, so that the production cost can be reduced.

Further, since the float 24 is provided with the weight 24 and the float 7 is balanced and the number of fulcrums is the minimum necessary, the force between the fulcrums does not antagonize. Further, since the bearing 23 is arranged around the height of the tip of the float arm 11, no bending moment is applied to the float 7 due to the running resistance of the roller 15. In addition, when a person rides on the end of the float 7, the force acting on the bearing 23 is doubled. However, since the spacing between the bearings 23 is sufficiently large in consideration of the coefficient of friction, no biting occurs. The float 7 and the gate 2 move up and down smoothly, and the water level of the water channel 1 is stabilized.

Further, since the bearing 23 is in the air, a commercially available bearing having low frictional resistance can be used. Therefore, the bearing 23
Can be small. Further, since the number of fulcrums is the minimum necessary limit, the force between the fulcrums does not antagonize. Further, since the pair of bearings 23 are arranged vertically about the axis of the float arm 11, no bending moment acts on the float 7 due to the running resistance of the roller 15.
Since the bearing 23 is in the air, dust in the water does not bite. Therefore, the vertical movement of the float 7 is not affected from all aspects, the gate 2 operates smoothly, and the water level is stabilized.

[0033]

As described above, the present invention is constructed as described above, and the watertight rubber disposed in the gap between the float chamber and the float suppresses a rapid change in the water pressure in the float chamber. In view of the above, there is no need to increase the float, and since the structure is simple, there are no restrictions on the installation location and the production cost is small. In addition, a guide rod is added
Prevents side-to-side swaying of the float so the float position is stable
In addition, the weight of the float and counterweight can be reduced, and the production cost can be reduced in that respect as well. Further, since the float is made to move smoothly, the operation of the gate becomes accurate, and the water level can be stabilized.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a gate opening / closing device according to the present invention.

FIG. 2 is a plan view of the gate opening / closing device shown in FIG.

FIG. 3 is a sectional view of a conventional gate opening / closing device.

FIG. 4 is a sectional view of another conventional gate opening / closing device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Waterway 2 Gate 3 Door body 6 Float room 7 Float 9 Water injection pipe 11 Float arm 11a Groove 15 Roller 21 Guide rod 22 Connecting material 25 Watertight rubber

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) E02B 7/42 E02B 7/20 105

Claims (2)

(57) [Claims] A gate body is provided so as to be openable and closable over the width of a water channel, and a float is accommodated in a float chamber into which flowing water on an upstream side of the door body is drawn in through a water injection pipe. in switchgear gate is linked bets, always within the float chamber, the portion which is located in water, and mounted in a circumferential shape so as to project a watertight rubber from the inner wall, the float tip portion of the water-tight rubber A gate opening / closing device that is closely attached to a peripheral surface . 2. The float is suspended from a float arm having an involute curved groove via a roller that slides in the groove, and a guide rod is vertically mounted on a fixed plate mounted at an upstream position of the float chamber. 2. The gate opening / closing device according to claim 1, wherein a connecting member erected on the upper surface of the float is vertically slidably supported on the guide bar.