JPS6355210A - Preventer for excess air supply in pneumatic dam - Google Patents

Abstract

PURPOSE:To save the consumption energy by a method in which when the internal pressure of a pneumatic dam exceeds a fixed one, a prime mover is stopped by the action of excess air. CONSTITUTION:An air blower 6, an air supply tube 7 for a pneumatic dam 1, and a water tank 12 are provided, and a pipe 11 branched from the tube 7 is connected to the bottom of the tank 12. An air-collecting cover 14 is provided to the bottom of the tank 12 and connected to a cylinder 20. A prime mover 9 for operating the blower 6 and a connector to transmit the action of the piston bar 21a of the cylinder 20 to the mover 9 are provided. When the air pressure in the bag 1 reaches more than a fixed value, air is supplied to the cylinder 20 in an excess air supply preventer 10 to raise the piston 21, and the prime mover 9 is stopped by an operating lever 60 connected to the piston 21. The consumption of energy can thus be saved without wasteful supply of air.

Description

Detailed Description of the Invention (Industrial Application gf) The present invention is designed to prevent excess air by injecting air into a rubber bag to make it stand up, and by discharging the air and making it fall down. This invention relates to an oversupply prevention device for an air dam that prevents air from being injected.

(Prior Art) Conventionally, an air weir as shown in FIG. 7 has been used, in which a bag body 1 made of rubberized cloth is fixed to the seabed and river bank surface of a river 3 by means of fixing means 2. A blower 6 is driven by an electric motor 5 or the like in a machine room 4 installed on land, and air is injected through a blow pipe 7 to raise the bag 1 and form a dam. Then, the water level detector 8 electrically detects that the rubber salt has risen and the water level of the river upstream of the weir has reached a predetermined height, and the source of power to the blower 6 such as the electric motor 5 is stopped. There were things like letting them do it.

As a prior art, for example, there is Japanese Patent Application Laid-Open No. 146511/1984.

(Problem to be solved by the invention) As mentioned above, in the past, the river water level upstream of the weir was detected,
The air blowing had been stopped, but in times of drought, even if the weir body is completely erected, the river water level upstream does not rise easily, so the air blowing is not stopped. This was extremely uneconomical as air continued to be blown unnecessarily, and also caused malfunctions. Furthermore, an internal combustion engine is often used to power the blower, but when detecting the water level in one breath, a power line must be laid just for the purpose of detection, which is extremely inconvenient and rare.

The present invention provides a device that can completely stop a prime mover and close a valve using a simple device without using electrical methods.

(Means for Solving the Problems) The present invention provides an air layer oversupply prevention device as a means for solving the above problems. , an air blower, an air pipe for supplying air from the air blower to an air layer bag disposed in a river, a water tank disposed near the bag, and a bottom portion of the water tank branched from the air pipe; a branch pipe that opens into the water tank; an air collection lid that is disposed around the opening of the bottom of the water tank of the branch pipe and captures air discharged from the branch pipe; , consisting of a cylinder operated by air pressure sent from the air collection lid, a driving prime mover for driving the gL feeder, and a linking means for transmitting the operation of the piston rod of the cylinder to the two prime movers. It is composed of

(Function) The internal pressure of the blower pipe that injects air into the air layer bag body increases when the air layer starts to rise, but the tip of the branch pipe is sealed with water at the bottom of the tank. In the reeds where the internal pressure reaches a certain value, air continues to be blown and an air layer rises.0However, when the air layer finishes rising and the internal pressure exceeds a certain value, the air in the blower pipe is discharged from the branch pipe that opens to the bottom of the tank. The air is captured by the air collection lid, reaches the air pipe connected to the cylinder, flows into the cylinder, and presses the piston. Since the piston is connected to the stop operation lever of the prime mover, when the piston operates, the prime mover stop operation lever is moved and the prime mover is stopped.

(Example) Examples of the present invention will be described below regarding meat.

As shown in Fig. 81 and Fig. 2, an air layer weir made of a flexible material such as rubber-coated cloth crosses the river 3 and is fastened to the riverbed and riverbank surface by appropriate fixing means 2. There is. A blower 6 is connected to the weir body 1 via a blow pipe 7 for sending pressurized air into the weir body. The air blower @6 is provided to be driven by a suitable prime mover 9.

6. A prime mover 9 and a drive device 10 for preventing excessive air supply, which will be described later, are housed in a machine room 4 located away from the river 6 or elsewhere.

A branch pipe 11 branched from the first blow pipe 7 is introduced into an aquarium 12 installed near a river, and its end is connected to the bottom 1 of the aquarium.
It opens into the water hole 312 near 5. Branch pipe 11
An air collection lid 14 is provided near the opening in the water tank 12 to capture all the air discharged from the first branch pipe 11.

The air collection lid is a container body whose lower part is open and the other parts are closed, and the upper end of the air collection lid 14 is provided so that the lower ends of the air pipe 15 and the cylinder pipe 16 open into the air collection lid 14. is connected to. The cylinder pipe 16 extends to the vicinity of the machine room 4, and a cylinder 17 is attached to the tip thereof.

As shown in FIGS. 3 to 5, the air supply pipe 15 is connected to the cylinder 20 of the drive device 10 for preventing excessive air supply. The excessive air supply prevention drive device 1tit10 will be described below. The oversupply prevention drive device 10 generally includes a cylinder 20, a piston 21, and a linking means 30 with a piston 21 and a prime mover 9, parallel link means (44, 45,
48), short metal fittings 57, rolling weight means (51, 55), operating rod 59, etc. The air supply pipe 15 is connected to the cylinder 20 via four tubes 18 provided near the bottom of the cylinder. A piston 21 is attached to the cylinder 20, but the piston 21 has no piston ring, fits loosely into the inner wall of the cylinder 20, and has many grooves on the fitting surface (piston side surface). The piston 21 has
The piston rod 21a is attached, and the piston rod 2
An operating pin 21b that protrudes horizontally from the piston rod 21a on both sides is fixed to the middle part of the piston rod 1a. The cylinder 20 is placed vertically on a base 19, and two columns 22 are erected on the base 19, and the upper ends of the two columns are
They are connected by an upper beam 23, and a cantilever beam 24 projects from the upper beam 23. A rod holder 25 is attached to the tip of the cantilever beam 24, and the rod holder 25 has a piston port "/de 21".
The tip of a is inserted. The tip of the piston rod 21a is divided into two prongs, and the anti-rotation pins 25a to 25f inserted from the rod receiver 25 are inserted into these two prongs. As a result, the piston rod 21a is supported by the rod receiver 25 so as not to rotate once and to be able to freely move vertically. In addition, at the bottom of the piston 21, there is a central protrusion 2.
1c is fixed, so that when the piston 21 is lowered, the main body of the piston 21 does not reach the bottom of the cylinder 20, so that the piston 21 is positioned above the opening of the air pipe 15. Further, in the first (2), the piston groove 1 door 21a is connected to the operating lever 60 for stopping the prime mover 9.
However, since many link devices are actually interposed between the piston rod 21a and the operating lever 600, these will be explained below.

An operating shaft 26 for actuating a motor stop operating lever is fixed to the column 22 between the left and right columns 220, and an operating link 27 is pivotally supported on the operating shaft 26. #-i above the operation @ 26 of the column 22, the operation shaft 28 is connected to the operation shaft 2
6, it is fixed between the left and right columns 22, and the operational shaft 2
An upper operation link 29 is pivotally supported at 8 . Operation link 27 and upper operation link 2? form a parallelogram link, and the T-link 30 connects the tip pin 31 of the operating lever 27 and the tip pin 32 of the upper operating link 29. Also, from the middle of the T-link 30 to the T-link branch 5
0a protrudes and the operation pin 21 of the piston rod 21a
It extends to the bottom of b.

An arm 27a protrudes from the operation link 27 in the KM angle direction of the line connecting the operation shaft 26 and all of the bottles 51.
An operating roller 33 is pivotally supported at the tip of a. A hook par 35 is pivotally supported by a hook bar support bin 34 on the upper operation link 29, and a hook-shaped groove is bored near the right end of the hook par 35 to form a hook part 35a. The end to the right of the hook part 35a of the fitted hook par 35 is the tapered part 35.
b. The bottom surface of the hook par 55 is the support bin 34
The left part of the T-link 30 contacts the upper end of the T-link 30 to maintain a horizontal position, and the stopper part 35c protrudes downward and this part contacts the side surface of the T-IJ hook 0, so that the T-link 30 is rotated by more than a certain angle. It is designed not to move.

The upper operation link 29 extends to the right, and a weight 37 is attached to the right end thereof. In this embodiment, the rotation angle of the operating slide 27 and the upper operating link 290 forming a parallelogram link is 301 vertically from the horizontal, and FIG. 4 shows the entire state at the lower limit position. Further, when the parallelogram link reaches the upper limit, the weight 37 reaches the lower limit position, so a stopper 38 is provided to support the weight 37.

The stopper 58 is placed on a holder 59a protruding from the lower girder 39 connecting the left and right columns 22, and the stopper 58 is placed on a holder 59a that protrudes from the lower girder 39 connecting the left and right columns 22. The upper surface of 18 is covered with a buffer plate 58a.

In addition to the parallelogram link 27 centered on the operation link 27 for operating the operation lever for stopping the prime mover, the support column 22 also includes a parallelogram link 44 for starting the prime mover and opening/closing the check valve, which will be described in detail below. .45.48 is provided. In order to do this, the valve shaft 41 of the check valve 40 provided in the middle of the air pipe 7 coming out of the blower 6 is supported by a bearing 42 mounted on two pillars 22'. It is installed through it (Fig. 3, Fig. 5).

An upper shaft 43 is fixed between the left and right pillars 220 at a portion of the pillars 220 above the bearing 42 that supports the valve shaft 41 . From the valve stem 41 is a link 44 that is fixed to the valve stem 41.
protrudes from the valve stem 41 to the lower left in Fig. 4, and the upper stem 4!1
A beam/beam 45 is pivotally supported, and a vertical link 48 is rotatably connected by a beam/46° 47 between the tip of the link 44 and the tip of the link 45, forming a parallelogram link. ing. The link 44 also extends in the opposite direction to form a starting lever 49. Both the link 44 and the activation lever 49#i are fixed to the valve shaft 41, but a drive roller 50 projects from the activation lever 49 while being pivotally supported by an arm 50a.

A rolling pipe 51 is fixed to the valve shaft 41 .

The transfer tube 51 has an annular band 53 in the center having an ear axis 52 that coincides with the valve stem 41, and the ear axis 52 is offset from the central axis of the transfer tube 51.The Q transfer tube 51 has lids 54 at both ends. 'I
A spherical rolling weight 55, which is hollow and has a diameter slightly smaller than the inner diameter of the tube, is enclosed therein. Further, the bracket 5 is connected to the vertical link 48 of the parallelogram link including the valve shaft 41.
6 protrudes and the tip pin 56 a of the bracket 56 7:
) h et al., the short hardware 57 is standing up. The bent tip 57a of the short hardware 57 is connected to the two links 45.
It passes through the gap and projects to the left in FIG. 4, completely over the tip pin 47 of the link 45. Tip 5 of short hardware 57
When the link 45 rotates and comes to the horizontal position, it comes into contact with the operating pin 21b of the piston rod 21a, and the contact continues until the link 45 tilts downward 1c25° from the horizontal position, and the link 45 tilts no further. If so, select operation bin 2.
It has a length that allows it to come out of contact with 1b. In the position shown in FIG. 4, the valve shaft 41 is in a rotated state so that the check valve 40 is in the closed state.

The operating roller 53 and the drive roller 50 are connected to a motor operating lever 60 via a cam plate 58 and an operating ring 59 on the right side of FIG.

The position shown in FIG. 4 shows a state in which the driving roller 50 presses the cam plate 58 at a rest position before starting, and the prime mover 9 is stopped. The details of the connecting portion with the prime mover control lever 60 are shown in FIG. 6, and in FIG. 6, the control lever is pulled to the left.

This shows the state when the prime mover is running at maximum speed. The left contact surface of the cam plate 58 is in contact with the operating roller 63 and the drive roller 50.

The cam plate 58 is fixed to an operating ring 59, and the operating ring 59 is fixed to a force reducing piston 62 fitted in a force reducing cylinder 61. At the left end of the energy-reducing cylinder 61, an operation ring 59 is shaped like a piston rod, and is covered with a rod cover 63, and a small-diameter exhaust hole 61a is inserted between the rod cover 63 and the energy-reducing piston. When the deenergization piston 62 moves to the left end (the position shown in FIG. 6), the gap between it and the first rod cover 63 is slightly distorted. The deenergizing piston 62 is pressed from the left by a spring 64, so that the operating ring 59 always presses the operating roller 66 and the drive roller 50 via the cam plate 58.

The operating ring 59 is connected to a prime mover operating lever 60.

To explain the entire operation, the activation lever 49 shown in FIGS. 3, 4, and 5 is manually rotated clockwise using the fourth lever. As a result, the valve shaft 41 and the rolling pipe 51 simultaneously rotate in the same direction. If the starting lever 49i is released within the rotation angle of 45 degrees, the position of the rolling weight 55 of the rolling tube 51 will not change.

transfer! ! The rolling tube 51 returns to its original position due to the gravity of 55. When the starting lever 49 is rotated by 45 degrees or more, the rolling weight 55 rolls from left to right, and the valve shaft 41 rotates by 90°.

As a result, the backflow prevention 9P40 is fully opened, and the drive roller 50 is moved to the lower pressure position to the position shown in FIG. 6, so the cam plate 58 and the operating ring 59 are moved to the left by the force of the spring 64. As a result, the operating lever 60 of the prime mover 9 also moves to the left, and the prime mover 9 is activated.

Then, as shown in FIGS. 1 and 2, air is sent from the blower 6 to the bag body 1 through the blower pipe 7t, and the air layer 1 begins to rise. The water tank 12Kid water inlet 12a f is filled with water that was filled when the weir was raised last time, and the water tank is filled with water and is in a water-sealed state. No air escapes. However, when the air layer finishes standing up, the pressure inside the blast pipe 7 increases, and air is discharged from the tip of the branch pipe 11 to the bottom 13 of the water reservoir 12. This air is captured by the air collecting lid 14, passes through the air pipe 15, and reaches the cylinder 20 of the excessive air supply prevention device 10. Further, a cylinder pipe 16 also rises from the air collection lid 14 in the same way as the air supply pipe 15. Cylinder pipe 16
Since the opening from the air collecting lid 14 is located at a slightly lower position than the opening of the air pipe 15, it appears that all the air in the air collecting lid 14 flows into the air pipe 15. However, at the entrance of the air pipe 15 to the cylinder 20, there is a throttle valve 18.
As a result, air accumulates in the air supply pipe 15 and the air collecting lid 14, and air exists from the riser of the cylinder pipe 16 to below, so a small amount of air flows into the cylinder pipe 16. The cylinder 17 is blown and an air layer is raised to notify that the engine is about to start stopping. 10,000 - Due to malfunction etc.
If the prime mover does not stop and air continues to come out from the branch pipe 11, the entire air collection cover 14ij is filled with air.

Air begins to flow into the cylinder pipe 16. As a result, cylinder 1
The air flowing into the air supply pipe 15 passes through the throttle valve 18 and reaches the cylinder 20 of the excessive air supply prevention device 10 to push up the piston 21. In doing so, the operating bin 21b protruding from the middle part of the tovisist/rod 21a also rises. At this time, the T-link branch 60a remains in the same position since it is below the operating bottle, but the 1-valve shaft 41 rotates 06 times due to manual operation, and as a result, the parallelogram link centered around the valve shaft 41 also rotates. Since it has been rotated by 90 degrees, the short hardware 57 has risen and is located at the imaginary line 57'. Then, the operation bin 21b rises and reaches the tip of the short metal fitting 57 (current position #-j, 57'), but the short metal fitting 57 is moved to the vertical bracket I 56 (current position #-j, 56').
), it is tilted to the right in FIG. 4, and when the operation pin 21i) further rises and passes through, it returns to the position of the imaginary line 57'.

The operation bin 21b further rises, and then the first bar 35
i Push up. Then, the hook part 35 of the hook par 35
a and the hook bin 36 are disengaged, and the hook par 35 pressing the upper end of the TIJ link 30 is also disengaged, so that the link 29 becomes free for operation. Therefore, the upper operating link 29 is rotated clockwise in FIG. Then, press the cam plate 58 and push the operating ring 59 to the right to activate the drive! f
Move the operating lever 60 of A9 to the stop position.

At this time, the movement of the operating roller 63 to the right is caused by the falling blade of the weight 57, so that the movement of the operating ring 59 is too rapid at 1\, so the force reducing cylinder 61 provides resistance to the movement of the operating ring 59. That is, as shown in FIG. 6, when the operating ring 59 attempts to move, the piston 62 and cylinder 6 fixed thereto
A negative pressure is generated in one side of the cylinder chamber formed by the inner wall of the cylinder 1, and a compression action is applied to the other side, so this air resistance provides resistance, and the operating lever 6° is moved at an appropriate speed.

In this way, the prime mover 9 stops, and when the blowing of air from the blower 6 stops, the flow of air from the air pipe 15 into the cylinder 2° stops. Since the piston 21 is loosely fitted to the cylinder 20, it naturally rises when a large amount of air flows in from the air pipe 15, but when the inflow of air from the air pipe 15 stops, the piston 21 and cylinder 2o Air leaks from the gap, and the piston 21 descends under its own weight. Then, the operating bin 21F) first comes into contact with the short hardware tip 57a, but since the short hardware 57 does not escape like when the operating bin 21b goes up, the short hardware 57 is pushed down as the operating bin 21b descends. As a result, the link 45° link 44 is also pushed down, and the valve shaft 41 starts rotating.

The operating pin 21b presses the tip 57a of the short hardware 57 only while the short hardware 57 protrudes to the left in FIG. During the 50° rotation, the short hardware tip 57a is pressed by the operating pin 21b.Then, the link 4
4 can also be rotated approximately 50 degrees, so the valve shaft 41 can be rotated by approximately 50 degrees.
21b rotates about 50 degrees while pressing the short metal object. 9
When the P shaft 41 rotates 509 degrees, the rolling tube 51 also rotates about 50 degrees, but when the rolling tube 51 rotates more than 45 degrees, the rolling weight 55 moves from the right to the left in Fig. 4, contrary to the previous excitation. The valve shaft 41 rotates by 90 degrees. This prevents backflow-y
P40 is fully closed. At the same time, the drive roller 50 also moves to the right, but since the cam plate 58 has already been pushed to the right by the operating roller 33, the drive roller 250 moves to the right.
Move to the point where it hits 8th.

In this way, the short metal fitting 57 is pressed by the operating pin 21b, and the parallelogram link centered on the valve shaft 41 is rotated at an angle of 45 degrees.
Since it is necessary to rotate the link 44,
It is necessary to previously set the inclination of the link 45 and the relative position of the short metal fitting 57 to a matching length. Also, is the mounting position of the transfer pipe 51 based on the weight of the piston 21? In order to effectively utilize the position of the ear shaft 52, the rolling weight 55
1, start from the lower left 22. 5° position, and when the rolling tube 51 is horizontal, it will be at a position of 22.5° above the left and right, and at the tF opening position, it will be at a position of 22.5° below the right. It is preferable to leave it there.

On the other hand, the operating pin 21b pushes down the short metal piece 57, but also pushes down the portion of the T-link branch 50a that has been raised by the descent of the weight 37. Since the T IJ link branch 50a is located at the virtual line 30a', the operation pin/
21b is the T-link branch 30 after pressing down the short metal fitting 57.
a starts pressing and reaches the lower end position (the position shown in FIG. 4), which causes the operation link 27. Upper operation link 29
also rotates counterclockwise, and the weight 37 of the link 29 also rises. Then, the hook 35a of the hook lever 35 engages with the hook bin 56 to lock the upper operation link 29, and the weight 37 also returns to its original position. At this time, the operation roller 33 moves to the left due to the counterclockwise rotation of the operation link 27, but before that, the valve shaft 41 rotates counterclockwise, and the drive roller 50 comes into contact with the cam plate 58. Therefore, the operation stick will not restart due to the operation roller 35 moving to the left. When the air pressure inside the bag reaches a certain level or higher, air is supplied to the cylinder in the oversupply prevention device, causing the piston to rise, and the motor stop operation connected to the piston is activated to stop the motor. 0 This saves energy by not sending any more air into the air dam bag wastefully. 0 This operation also operates when the dam is not filled with water during a drought, and the operation is controlled electrically. Since no elements are used, no electric power is required, and the device also has the advantage of being able to provide a device with fewer failures.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram of the air layer and related main parts of the present invention 2 horizontally expressed, Fig. 2 is a plan view of the river internal pressure air layer and the machine room that controls it, and Fig. 3 Figure 4 is a side view of the over-air supply prevention device, Figure 5 is a front view of the device, and Figure 6 is a plan view showing the arrangement of equipment in the machine room. The seventh section is an enlarged side view of the cross-sectional view of the moving drive roller part and the energy-reducing sill, and is an explanatory diagram of the conventional air layer and its drive stop device. 1... Air layer bag body 7... Air pipe 11... Branch pipe 12... Water tank 14... Air collection lid 15... Air pipe 20... Cylinder 21... Piston 60.・・Operation lever for stopping the prime mover (2 other people) Fig. 1 14-・1 Ki J1 Issue 1 Heshibar Fang 2 Fig. 3 Senga 4 Fig. 5 Fig. Fang 7

Claims (1)

[Claims] (1) - An air blower; - An air pipe for supplying air from the air blower to a bag of an air weir placed in a river; - A water tank placed near the bag; - From the air pipe. a branch pipe that branches and opens at the bottom of the water tank; - an air collection lid that is disposed around the opening of the branch pipe at the bottom of the water tank and captures air discharged from the branch pipe; - the air collection lid. a cylinder that communicates with the inner cavity of the lid through an air pipe and is actuated by air pressure sent from the air collecting lid; - a driving prime mover for driving the blower; - a piston rod of the cylinder that is operated by the prime mover; An oversupply air prevention device for an air weir, comprising: a linking means for transmitting the information;