JPH0352252Y2 - - Google Patents

Description

[Detailed explanation of the invention] [Industrial application field] This invention is installed in canals, etc. in wooded areas such as agricultural and mountain villages, and is opened at all times and automatically opens when the water level reaches a predetermined level. Regarding automatic water gates that are closed during

[Prior art]

Conventionally, automatic flood gates equipped with a hydraulic cylinder device have a structure in which the door body is suspended by a piston rod and is moved up and down by supplying pressure oil into the cylinder. A valve is provided, and when the water level of the waterway exceeds a set water level, the float valve is opened to discharge the pressure oil from the piston rod side oil chamber in the hydraulic cylinder, and the door body is lowered to close the waterway. There is.

[Problems with conventional technology]

However, conventional hydraulic cylinder devices cannot completely prevent oil leakage due to wear and aging of the packing. As a result, the door body naturally descends, making it impossible to maintain the predetermined opening degree of the door body. To solve this problem, oil leakage prevention means or locking mechanisms for hydraulic cylinder devices have been proposed, but the structure is complicated and it is difficult to employ them in automatic flood gates.

[Means for solving problems]

In view of the above-mentioned circumstances, this invention was devised in order to automatically restore the water gate by replenishing oil even if oil leaks from the hydraulic cylinder device or valve, etc., and its characteristics are as follows. However, the hydraulic cylinder device that raises and lowers the door body can be operated by pressure oil from a hydraulic pump driven by an electric motor driven by a solar cell, and when the water level exceeds a predetermined water level, the door is closed. The body is configured to swoop down and block the waterway,
A position detection sensor detects a predetermined portion of the elevating part of the door body or a hydraulic cylinder device connected thereto, and in response to this detection signal, pressure oil is supplied to the hydraulic cylinder device to raise the door body to a predetermined position. The point is that the opening position is automatically returned to the opening position.

[Effect]

According to this invention, during normal times, the door body is raised by the hydraulic cylinder device and is in an open state, while electricity is stored by the solar battery. If an oil leak occurs and the door falls by a predetermined amount or more, the position detection sensor detects the door's descent, and the detection signal is sent to the control device, which drives the electric motor and the hydraulic pump to drive the hydraulic cylinder system. Pressure oil is supplied inside and the door body is raised. When the door body returns to a predetermined opening degree, a detection signal is sent by the position detection sensor to the control device, and the electric motor is stopped and oil supply to the hydraulic cylinder device is also stopped. In this way, the door body is automatically returned to its original position, and when the door body is lowered again by a predetermined amount or more, the above-described operation is performed again. On the other hand, when the water level of the waterway exceeds a predetermined water level, the hydraulic circuit is opened by the float valve, and the pressure oil in the hydraulic cylinder device that maintains the door body at a predetermined opening degree is discharged, and therefore the gate body swoops down and blocks the waterway.

When the water level in the waterway reaches a predetermined level, the float valve closes the hydraulic circuit, and the signal drives the electric motor, rotates the hydraulic pump, supplies pressure oil to the hydraulic cylinder device, raises the door body, and opens the predetermined amount. When this happens, the electric motor is stopped in response to a signal from the position detection sensor, and the door body is stopped in its normal position.

〔Example〕

The embodiments of this invention will be described in detail with reference to the drawings.

1 to 3 show the first embodiment, in which 1 is a waterway, 2 is a door groove provided on the waterway side wall 1A, 3 is a door body, and 4 is a hydraulic cylinder device, which is connected to a waterway 1 above the door body 3. The piston rod 6 is installed upright on a beam 5 extending between the side walls 1A, and the lower end of the piston rod 6 is connected to a metal fitting 7.
It is pivotally connected to the top end of the door body 3 via a pin 7A. 8 is a water level gauge chamber whose lower end communicates with the lower part of the waterway side wall 1A, and this water level gauge chamber 8
Inside, a float 10 of a float safety valve 9 is arranged at a predetermined set water level. When the waterway water exceeds a predetermined water level, the float 10 rises and the float safety valve operating rod 11 connected thereto opens the float safety valve 9, and when the float 10 falls below the predetermined water level, the float safety valve 9 is closed. It is becoming more and more like this. A hydraulic unit 12 is installed on the ground above the water level gauge chamber 8, and the float safety valve 9 is disposed within the hydraulic unit 12. This hydraulic unit 12 has a built-in hydraulic circuit and control device 13 shown in FIG.
As shown in FIG. 2, the hydraulic circuit includes a pressure oil supply pipe 14 to the lower chamber of the hydraulic cylinder 4A, which is driven by an on-off valve 15, check valves 16 and 17, a manual oil pump 18, and an electric motor 19. An oil pump 20 and strainers 21 and 22 are connected thereto, and the strainers 21 and 22 are arranged in an oil tank 23. Furthermore, a bypass pipe 24 is connected between the hydraulic cylinder 4A of the pipe line 14 and the on-off valve 15 via an unload valve 25.
4 is also led to the oil tank 23. Furthermore, a bypass pipe 2 is provided in the lower chamber of the hydraulic cylinder 4A.
6 are connected via the float safety valve 9.

Reference numeral 27 denotes a solar cell, which is installed on a support post 28 so as to be placed higher than the tree, and the power generated here is stored in a power storage/conversion device 29. A plurality of detected objects 30 are disposed at the bottom of the piston rod 6, and a plurality of position detection sensors 31 are disposed at corresponding positions when the door body 3 is at a position with a predetermined opening degree at a predetermined design water level. The mounting member 3 suspended from the beam 5 as shown in FIG.
The sensor 31 is attached to 2. Signals S from these sensors 31 are led to a control device 13 in the hydraulic unit 12, and the starting and stopping of the electric motor 19 is controlled.

According to the first embodiment of this invention, the door body 3 is raised and opened by supplying pressure oil to the lower chamber of the hydraulic cylinder 4A by either the manual oil pump 18 or the electric oil pump 20. It is always maintained at a predetermined opening. That is, when the door body 3 descends below a predetermined amount due to oil leakage, the detected object 30 is detected by the position detection sensor 31, and the detection signal S
is led to the control device 13, and the electric motor 19 stores electricity.
Electric power from the converter 29 is supplied to the oil pump 2.
0 is operated, and at the same time, the on-off valve 15 is opened, pressure oil is supplied to the lower chamber of the hydraulic cylinder 4A, and the door body 3 is raised. When the door body 3 returns to the predetermined opening position, the detection signal S of the detected object 30 by the position detection sensor 31 is applied to the control device 13, the power supply to the electric motor 19 is stopped, and the oil pump 20 is stopped. , the on-off valve 15 closes, and the door body 3 also stops at the predetermined opening position. When the door body 3 is lowered in this manner, the above-described operation is repeated by the position detection sensor 31, and the door body 3 is returned to the predetermined opening degree.

Therefore, when the water level exceeds a predetermined water level, the float 10 opens the float safety valve 9, the oil in the lower chamber of the hydraulic cylinder 4A flows down to the oil sump 23, and the door body 3 quickly descends, completely blocking the water channel 1. . In this state, the signal from the position detection sensor 31 does not operate the electric motor 19. When the water level of the waterway 1 returns to the predetermined water level, the float safety valve 9 closes, and the electric motor 19 is operated by the signal, and the on-off valve 1
5 opens to supply pressure oil to the lower chamber of the hydraulic cylinder 4A, and when the door body 3 is raised to a predetermined opening degree, the signal S from the position detection sensor 31 is input to the control device 13, the electric motor 19 is stopped, and the pressure is increased. The oil supply is cut off and the on-off valve 15 is closed. In this way,
The door body 3 is automatically opened and closed according to the water level,
Since the solar cell 27 can be placed higher than the tree to efficiently generate electricity, its power can be demonstrated to a great extent in areas where commercial power is not supplied.

FIG. 4 shows another embodiment of this invention, in which an accumulator 33 is added to the device of the first embodiment. Therefore, the same reference numerals are given to the same constituent members as in the first embodiment, and detailed description thereof will be omitted. Note that an on-off valve 3 is provided between the hydraulic cylinder 4A of the pressure oil supply pipe 14 and the bypass pipe 24.
4, which opens when the door body 3 is opened or closed arbitrarily,
Close when automatically returning.

35 is a pressure oil supply pipe connecting the pipeline 14 between the bypass pipe 24 and the on-off valve 34 and the accumulator 33; 36 is the accumulator 33 and the hydraulic cylinder 4;
An oil replenishment pipe 37 for returning the door body, which connects A and the pipe 14 between the on-off valve 34, is an electromagnetic on-off valve that is interposed in the oil replenishment pipe 36, and detects the detection signal S of the position detection sensor 31. It is made to open and close by. Note that 38 is a pressure detection signal of the accumulator 33, which is input to the control device 13,
When the pressure drops below a predetermined pressure, the electric motor 19 is operated, and the oil pump 20 is driven to supply pressurized oil to the accumulator 33 . When the pressure inside the accurator 33 reaches the set pressure, the electric motor 1
9 is now suspended. Therefore,
In this second embodiment, when the automatic return is performed, if the on-off valve 34 is closed, the hydraulic cylinder 4
The position detection sensor 31 detects the detected object 30 due to the lowering of the door body 3 due to pressure oil leakage in the A lower chamber, and the electromagnetic on-off valve 37 opens in response to the signal, reducing the pressure inside the accumulator 33. Oil is supplied to the lower chamber of the hydraulic cylinder 4A, the door body 3 rises, and the detected object 30
When the detection signal S is input to the control device 13, the electromagnetic on-off valve 37 is closed, the supply of pressure oil to the lower chamber of the hydraulic cylinder 4A is stopped, and the door body 3 automatically returns to the predetermined opening position. be given

〔effect〕

Since the automatic flood gate according to this invention has the above-mentioned configuration, it has a simple structure and can be used even in canals installed in mountains or areas with thick trees.
Since it uses solar cells, it is possible to open and close the water gate using a hydraulic cylinder using an electric motor, ensuring reliable water control, and preventing the gate from lowering due to oil leaks from valves, piping, etc., as well as hydraulic cylinder leaks. It can automatically rise and return to the predetermined opening even if there is a problem, and its operation is reliable, making a great contribution to the opening/closing and automatic return of water gates installed in areas without commercial power. We have high expectations for its effectiveness.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway front view showing the first embodiment of this invention, Fig. 2 is a hydraulic circuit diagram, Fig. 3 is an explanatory block diagram, and Fig. 4 is an explanatory diagram of the second embodiment of this invention. It is a block diagram. DESCRIPTION OF SYMBOLS 1... Waterway, 3... Door body, 4... Hydraulic cylinder device, 4A... Hydraulic cylinder, 10... Float, 9... Float safety valve, 13... Control device,
14...Pressure oil supply pipe line, 15...Opening/closing valve, 19...
. . . Electric motor, 20 .

Claims (1)

[Scope of utility model registration request] A door body 3 provided in the waterway 1, a hydraulic cylinder device 4 that moves the door body 3 up and down, an oil pump 20 and a pressure oil supply pipe 14 that supply pressure oil to the hydraulic cylinder device 4, and a pressure oil supply pipe 14. On-off valve 1 installed in the middle of
5, a bypass pipe 26 connected to the lower chamber of the cylinder 4A of the hydraulic cylinder device 4 via a float safety valve 9, a float 10 floating on the water surface that opens and closes the float safety valve 9 at a predetermined water level, and an oil pump drive An electric motor 19, a control device 13 that controls the electric motor 19 and the on-off valve 15, and a detected object 30 provided on the lifting/lowering part of the hydraulic cylinder device 4 or the door body 3.
and a position detection sensor 31 that sets a predetermined door opening degree and inputs a detection signal S to a control device 13.