JPS6223130B2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to an automatic gate lowering device.

Some water storage tanks are equipped with an automatic tipping device that automatically detects the water level when it rises to a certain level, and also tips down the gate to release water. . Conventionally, this lodging device has a weight attached to one side of the balance arm and a float for water level detection attached to the other, and when the water level rises and reaches the lodging water level, the balance is lost and the lever comes off, causing the gate to close. The structure is such that the opening/closing valve of the hydraulic cylinder used to incline is opened. However, this device requires a large balance arm and a weight is attached to the tip of the balance arm, which has the disadvantage that the device itself becomes large.

That is, in the present invention, the intermediate part of the cable, which has a float attached to one end to detect the water level of the water tank and a weight attached to the other end, is wound around a ring body rotatably supported on a frame. A first cam plate is provided which rotates in conjunction with the rotation of the wheel, and a second cam plate is provided which operates a control device for lowering the water tank gate.
The first cam plate is rotatably supported on the same axis as the first cam plate, and a protrusion is provided on a side surface of the first cam plate to protrude into an engagement hole formed in the second cam plate, and the engagement hole This is an automatic gate lowering device characterized in that the first cam plate is configured in an arc shape to allow rotation of the first cam plate over a predetermined angular range.

According to the configuration of the present invention, two cam plates are used to operate the gate collapse control device, so the device itself can be made smaller compared to the conventional balance arm type. is possible,
In addition, the second cam plate, which directly operates the control device, can freely rotate the first cam plate within a predetermined angle range, so once the gate falls down, it will automatically rise even if the water level falls. Without a doubt,
Therefore, it can be laid down until the end.

Hereinafter, one embodiment of the present invention will be described based on FIGS. 1 to 8. Reference numeral 1 denotes a water discharge gate provided in a water storage tank 2, which is operated by a hydraulic cylinder 3.
A hydraulic unit 4 supplies pressure oil to the hydraulic cylinder 3 via a hydraulic pipe 5. A hydraulic control device 8 consisting of a manifold 6 and a shut-off valve 7 is provided in the middle of the hydraulic pipe 5. Reference numeral 9 denotes an automatic gate lowering device for automatically opening and closing the gate 1, which will be described in detail below. 10 is a sounding well connected to the bottom of the water tank 2 via a sounding pipe 11;
A casing 12 of the automatic gate lowering device 9 is provided at its upper end. 13 is a water level gauge provided on the cover plate 14 of the casing (an example of a pedestal) 12, which is wound around a rotatably supported pulley (an example of a ring) 15 and the upper half of this pulley 15. It also consists of a rope body 18 having a float 16 attached to one end for detecting the water level in the sounding well 10 and a first weight 17 attached to the other end. A rotary support shaft 19 is rotatably supported within the casing 12 and is communicatively connected to the pulley 15. That is, the reduction mechanism 2 is on the pulley 15 side.
A first sprocket 21 is provided which rotates and communicates with the pulley 15 via a rotary support shaft 19.
A second sprocket 22 is provided at the end of the sprocket, and the first sprocket 21 and the second sprocket 2
A chain 23 is wound around 2 and 2. Reference numeral 24 designates a disk-shaped first cam plate fixed to the rotation support shaft 19, and a rod-shaped projection 25 is provided on one side of the first cam plate. 26 is the boss portion 2 of the first cam plate 24;
The second cam plate is a disc-shaped second cam plate rotatably supported by the second cam plate 4a, and one semicircular portion thereof is a large diameter portion 26a, and the other semicircular portion is a small diameter portion 26b. And, on the large diameter portion 26a side of the second cam plate 26,
An engagement hole 27 for engaging and guiding the protrusion 25 of the first cam plate 24 is bored, and this engagement hole 27 is connected to the first cam plate 24.
The cam plate 24 is formed into an oval and arc shape to allow rotation over a predetermined angular range. Therefore, the second cam plate 26 is rotated in conjunction with the first cam plate 24 only when the protrusion 25 of the first cam plate 24 moves beyond the range of the engagement hole 27. Note that the speed reduction mechanism 20 allows one revolution of the first cam plate 24 to exactly match the measured water depth range. 28 connects the shut-off valve 7 of the hydraulic control device 8 provided in the middle of the hydraulic piping 5 to the pulley 15 of the water level gauge 13.
This is a swinging lever that is automatically activated by the rotation of the lever. That is, at one end of the swing lever 28, there is a contact roller 2 that contacts the outer periphery of the second cam plate 26.
9 is attached, and the vicinity of the other end is supported by the casing 12 via a horizontal pin 30, and the other end is connected to the operating rod 3 of the shut-off valve 7.
1. A second weight 32 is attached near one end of the swing lever 28, and is used to press the contact roller 29 toward the second cam plate 26. The second weight 32 is movable along the swing lever 28, so that the pressing force of the contact roller 29 can be adjusted. 33 is a stopper for regulating the amount of swing of the swing lever 28, and 34 is a presser ring for the second cam plate 26.

Next, the operation will be explained.

First, FIG. 5 shows the set state of each cam plate 24, 26. In this state, the contact roller 29 is in contact with the starting end side of the large diameter portion 26a, and the protrusion 25
is located at the end of the engagement hole 27 so as to rotate the second cam plate 26 as soon as the water level rises. In this state, as the water level gradually rises, the float 16 rises and the first cam plate 24
rotates in the direction of arrow A. When the first cam plate 24 rotates, the second cam plate 26 rotates in the same direction via the protrusion 25, but as shown in FIG. , the swing lever 28 remains as it is. Then, when the water level further rises from the above state and reaches a level where the gate 1 is toppled down, the contact roller 29 moves to the small diameter portion 26b as shown in FIG. It goes down as shown in . Then, the other end of the swing lever 28 rises to operate the shutoff valve 7, and the gate 1 is lowered. Furthermore, once the gate 1 collapses, as shown in Fig. 8,
Even if the first cam plate 24 rotates in the opposite direction C as the water level falls, the second cam plate 26 does not rotate, so its collapsed state is maintained.

According to the above configuration, two cam plates are used to operate the gate collapse control device, so the device itself can be made smaller compared to the conventional balance arm type. In addition, the second cam plate that directly operates the control device can freely rotate the first cam plate within a predetermined angle range, so once the gate falls down, it will automatically rise even if the water level falls. There is no climbing and therefore it can be laid down to the end. Furthermore, since the control is performed via the cam plate, adjustment is easy, and since the control mechanism is mechanical, it operates reliably regardless of power outages.

In the above embodiment, the water level gauge 13 and the rotation support shaft 19 of the cam plates 24, 26 are linked via the deceleration mechanism 20, but if the pulley 15 for measuring the water level is not required ( If the water level is not measured), a pulley and a speed reduction mechanism may be attached directly to the rotation support shaft 19.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; FIG. 1 is an overall sectional view, FIG. 2 is an enlarged sectional view of the main part, FIG. 3 is a front view of the cam plate, and FIG. 4 is a view of the part shown in FIG. The arrow view and FIGS. 5 to 8 are operation explanatory diagrams. DESCRIPTION OF SYMBOLS 1... Gate, 2... Water tank, 3... Hydraulic cylinder, 7... Shut-off valve, 8... Hydraulic control device, 9... Gate automatic lodging device, 10... Deep sounding well,
12...Casing, 15...Pulley, 16...Float, 17...First weight, 18...Cable body, 19...Rotation support shaft, 21...First sprocket, 22...Second
Sprocket, 23... Chain, 24... First cam plate, 25... Protrusion, 26... Second cam plate, 26a... Large diameter part, 26b... Small diameter part, 27... Engagement hole, 28... Swing lever, 29... Contact roller.

Claims (1)

[Claims] 1. The middle part of the rope, which has a float attached to one end to detect the water level of the water tank and a weight attached to the other end, is wound around a wheel that is rotatably supported on a frame, and the rope is rotated by the rotation of the wheel. A first cam plate that rotates in conjunction with the second cam plate is provided, and a second cam plate that operates a control device for lowering the water storage tank gate is freely rotatably supported on the same axis as the first cam plate. A projection is provided on the side surface of the cam plate that projects into the engagement hole formed in the second cam plate, and the engagement hole allows rotation of the first cam plate over a predetermined angular range.
An automatic gate lowering device characterized by an arcuate configuration.