KR20150142182A - Hydraulic control apparatus for movable weir - Google Patents

Abstract

The present invention relates to a hydraulic control device for a movable weir and, more specifically, relates to a hydraulic control device for a movable weir capable of stably operating a floodgate forming a movable weir without a torsion by equally distributing a rate of flow of operation oil to a plurality of cylinders to operate the floodgate. The hydraulic control device is applied to the movable weir, having the floodgate arranged across a channel and the plurality of cylinders moving the floodgate to open and close the channel to operate and control the cylinders. The hydraulic control device for a movable weir comprises: a pump operated by a motor to discharge the operation oil of a hydraulic tank; a direction conversion valve to control an operation direction of the cylinders by controlling a direction of the operation oil supplied to the cylinders by the pump; a pilot check valve to prevent backflow of the operation oil supplied to the cylinders; and a distribution valve to synchronize the cylinders by equally distributing the flow rate of the operation oil supplied to the cylinders from the direction conversion valve to the cylinders.

Description

Technical Field [0001] The present invention relates to a hydraulic control apparatus for a movable beam,

More particularly, the present invention relates to a hydraulic control apparatus for a movable beam, and more particularly, to a hydraulic control apparatus for a movable beam that uniformly distributes operating oil by a plurality of hydraulic cylinders provided for operation of a watercraft to prevent twisting of the watercraft due to unbalanced force, The present invention relates to a hydraulic control apparatus for a movable beam, which prevents abrupt opening of a watercraft due to an overload when the watercraft is opened and closed.

In general, weir refers to a kind of clam fence that regulates the water level of a river, which is widely used nowadays because it plays a very important role in securing agricultural, industrial and domestic water. In addition, if several beams are installed in a river in which a dam can not be installed, it can be used as an alternative structure for medium and large dams because the water quantity can be adjusted.

On the other hand, it is divided into high information and movable beam according to the viewing mode. In general, the moving gate is closed to confine water to a river, a river or a reservoir so that it can be used for various purposes. And functions to prevent the flow of water to the upstream side when the downstream water is blown.

The structure of the movable beam includes a water gate arranged to cross the water channel and opening or closing the water channel while rotating around the rotation axis, and a driving unit rotating the water gate around the rotation axis so that the water gate is raised or turned.

At this time, although the cylinder or the motor is used as the driving unit, the driving unit using the cylinder is mainly used because the driving unit tends to be exposed to moisture due to the nature of the watercraft.

On the other hand, an example of a rotary movable beam constructed using a driving unit using a cylinder is disclosed in Patent Publication No. 1281596.

The rotary type moving saw disclosed in the above-mentioned invention is constituted by a rotary shaft provided at the gate and a cylinder connected to each other via a rotary arm.

In the case of the rotary movable beam constructed as described above, the rotary shaft rotates as the rotary arm is pushed by the extension of the cylinder, and the water gate rises with the rotation of the rotary shaft, thereby closing the water channel (discharge blocking).

On the other hand, the rotary movable beam is provided with a hydraulic pressure control device for operating and controlling the cylinder, and the hydraulic pressure control device includes a hydraulic tank and a pump, and various valves for controlling the hydraulic oil supplied from the pump to the cylinder .

In the conventional hydraulic control apparatus, the difference in the load acting on each cylinder and the resistance depending on the length of the oil passage and the position of various valves are different, and the oil is supplied to the cylinders disposed on both sides of the water inlet, And when the hydraulic fluid is supplied to the respective cylinders at different flow rates, there is a problem that the water gate is twisted in the course of operation of the water gate.

In addition, when the pressure applied to the gate due to the increase of the upstream water level is increased beyond a preset value, it is preferable to automatically open the gate to some extent in order to prevent damage to the water gate. A separate water level sensor is installed and the water gate is automatically opened based on the signal generated from the water level sensor. However, since the water level sensor must be installed separately, the facility cost is increased and separate maintenance for the water level sensor is required .

Registered Patent Publication No. 1281596 (issued on March 3, 2013) Patent Registration No. 0729411 (published on Jun. 18, 2007)

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and it is an object of the present invention to provide a hydraulic control apparatus and a control method thereof, Which is capable of stably operating the watercraft without twisting.

It is another object of the present invention to provide a hydraulic control device for a movable beam which can automatically open a sluice when a pressure acting on the sluice reaches a predetermined value due to an increase in the upstream level.

It is a further object of the present invention to provide a hydraulic pump which can prevent the operation of the motor and the pump from being stopped or return the hydraulic oil discharged from the pump to the hydraulic tank when the overload occurs in the opening and closing of the watertight door, And a control unit for controlling the hydraulic pressure of the movable beam.

According to an aspect of the present invention, there is provided a movable beam including a plurality of cylinders for moving a water gate for opening and closing the water channel, A hydraulic pressure control device for operating and controlling the cylinder, comprising: a pump that operates by a motor and discharges hydraulic oil from a hydraulic tank; A direction switching valve for controlling the direction in which the cylinder is operated by controlling the direction of the hydraulic fluid supplied to the cylinder by the pump; A pilot check valve for preventing the hydraulic fluid supplied to the cylinder from flowing backward; And a sorting valve for synchronizing the plurality of cylinders by evenly distributing the flow rate of the operating fluid supplied to the cylinders from the directional control valve to the respective cylinders.

In the hydraulic control apparatus of the movable beam, when the pressure of the hydraulic fluid is detected during the operation of the pump, a signal for generating a signal for stopping the operation of the pump when the pressure of the hydraulic fluid reaches a preset reference pressure value 1 pressure switch may be further included.

On the other hand, in the hydraulic control apparatus of the movable beam, when the pressure of the operating oil on the extension port side of the cylinder is sensed and the pressure of the extension port side working oil rises due to the increase of the upstream water level, A second pressure switch for generating a signal for opening the door; And a first valve for opening a return line connecting the extension port of the cylinder and the hydraulic tank by a signal generated from the second pressure switch to automatically open the water gate.

In the hydraulic control apparatus for the movable beam, the hydraulic control device of the movable beam is provided in a return line connecting the extension port of the cylinder and the first valve, and operates in conjunction with the direction switching valve, And a second valve that closes the return line and opens the return line when the flow path to the cylinder is blocked by the direction switching valve.

Meanwhile, the hydraulic control apparatus for the moving beam may further include a one-way throttle valve for controlling the speed at which the water gate is closed by controlling the flow rate of the hydraulic fluid returned from the cylinder to the hydraulic tank.

On the other hand, in the hydraulic control apparatus for the movable beam, it is preferable that the direction switching valve is constituted by a proportional control valve for automatically controlling the flow rate of the hydraulic fluid supplied to the cylinder in accordance with the load acting on the cylinder.

According to the present invention having the above-described features, since the hydraulic oil is supplied to the cylinders at equal flow rates by the sorting valve irrespective of the loads acting on the cylinders for operating the hydromassage, So that it is possible to prevent twisting of the watercraft.

In addition, by detecting the pressure change of the operating oil on the extension port side of the cylinder by using the second pressure switch, and automatically opening the water door based on the signal generated by the second pressure switch, A separate level sensor is not required, thereby reducing the cost of the overall system and improving the convenience of maintenance.

In addition, there is an effect that the damage to the water gate and related parts due to the occurrence of an overload in the opening and closing of the water gate can be prevented.

1 is a structural view of a hydraulic control apparatus according to a preferred embodiment of the present invention;
FIG. 2 is a structural view of a hydraulic control apparatus when a cylinder is extended;
FIG. 3 is a structural view of the inflow control device when the watercourse is automatically opened due to an increase in the upstream water level;
4 is a structural view of a hydraulic pressure control device when the cylinder is contracted.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

1 is a structural diagram of a hydraulic control apparatus according to a preferred embodiment of the present invention.

A hydraulic control apparatus according to the present invention is a hydraulic control apparatus for use in a movable beam including a water gate arranged to have a structure transversing a water channel and a plurality of cylinders coupled with the water gate to move the water gate, .

Meanwhile, the hydraulic control apparatus according to the present invention is characterized in that the hydraulic control apparatus according to the present invention is a hydraulic control apparatus according to the present invention, in which a hydraulically operated movable beam, in which a hydrant is moved upward and downward by a cylinder and in which a water channel is opened and closed and a hydraulically actuated movable beam which is opened or closed by a cylinder, The same can be applied without.

In addition, the hydraulic control apparatus shown in FIG. 1 has a structure for operating and controlling four cylinders 1 in total, and has a structure in which two cylinders are paired to operate a single water gate. However, The hydraulic control device can not be applied to the movable beam having four cylinders but can also be applied to movable beams having more or less than four cylinders.

The hydraulic control apparatus of the present invention for actuating and controlling the cylinder 1 provided in the movable beam includes the pump 10, the direction switching valve 20, the pilot check valve 30, and the sorting valve 40 do.

The pump 10 discharges the hydraulic oil stored in the hydraulic tank T and supplies the hydraulic oil to the cylinder 1. The pump 10 is connected to the motor 11 and operates by driving the motor.

Meanwhile, the hydraulic control apparatus according to the present invention includes a manual operation pump 12 for supplying hydraulic oil to the cylinder 1 by a user's operation in the same manner as a generally used hydraulic control apparatus for a movable beam, Check valves 13 and 14 are provided in the discharge lines of the pump 10 and the manual operation pump 12, respectively, for preventing back flow of discharged hydraulic oil.

A filter 15 for filtering the foreign substances contained in the operating oil supplied to the directional control valve 20 by the pump 10 and the manual operation pump 12 is installed in front of the directional control valve 20 have.

The directional control valve 20 controls the direction of the hydraulic fluid discharged from the pump 10 and supplied to the cylinder 1 so as to operate in a direction in which the cylinder is operated, that is, in a direction in which the cylinder is extended or contracted So that the direction of the operating oil can be controlled while being switched in response to an unshown lever or an electrical operating signal.

The directional control valve 20 according to the present invention is constituted by a proportional control valve for automatically controlling the flow rate of the hydraulic fluid supplied to the cylinder 1 in accordance with the magnitude of the load acting on the cylinder 1, By constituting the directional valve (20) with the valve, unnecessary energy consumption can be prevented and damage of the related parts due to overloading in the operation of the water inlet can be prevented.

Since the proportional control valve is already widely used, a detailed description of the structure of the proportional control valve will be omitted.

The pilot check valve 30 basically allows the flow of the hydraulic oil supplied from the cylinder 1 to the directional switching valve 20 while allowing the flow of the hydraulic oil supplied to the cylinder 1 through the directional control valve 20 Thereby preventing the hydraulic fluid supplied to the cylinder from flowing backward to the directional control valve 20 and thus preventing the water gate standing up so as to close the water channel from being conducted by water pressure.

The pilot check valve 30 is installed in two lines respectively extending from the extension port 1a and the shrinking port 1b of the cylinder 1. When the hydraulic oil is supplied through one line, The pilot check valve 30 installed in the line is opened by the pilot pressure to allow the hydraulic fluid to be returned to the hydraulic tank T through the directional control valve 20. [

The flow dividing valve 40 uniformly distributes the flow rate of the hydraulic fluid supplied to the cylinder 1 through the directional control valve 20 to the two cylinders 1 so that two cylinders 1 So that it is possible to prevent the occurrence of twisting in the gate when opening and closing the water gate.

Since this sorting valve 40 is a widely used valve, a detailed description of the structure of the sorting valve 40 will be omitted.

A one-way throttling valve 50 is further provided to prevent a sudden descent or conduction of the watershed due to the hydraulic pressure and the weight of the water gate in the descending operation (lifting operation) or the conduction operation (conduction operation) of the watering door.

The one-way throttling valve 50 connects the cylinder 1 and the directional control valve 20 so as to control the flow rate of the hydraulic fluid flowing from the cylinder 1 to the directional control valve 20 during the descending operation or the conduction operation Directional throttling valve 50 installed in the line permits the flow of the hydraulic fluid flowing from the directional valve 20 to the cylinder 1 freely while allowing the flow of the hydraulic fluid from the cylinder 1 to the directional valve 20, The flow rate of the hydraulic fluid is limited to a certain level, thereby preventing a sudden descent or conduction of the watercraft.

The hydraulic pressure control apparatus according to the present invention includes a first pressure switch 60 for detecting the pressure of the hydraulic fluid during the opening and closing operation of the watercourse and preventing damages of the watercourse and related parts due to the overload, And further includes a second pressure switch 70 for automatically opening the sidewall when the pressure acting on the sidewall increases beyond an allowable level to prevent damage to the sidewalk and related parts.

The first pressure switch 60 is installed to sense the pressure of the operating oil in the process that the operating oil is supplied to the cylinder 1 through the direction switching valve 20 by the operation of the pump 10, A signal is generated when the predetermined reference pressure value is reached.

When a signal is generated in the first pressure switch 60, the pump 10 is stopped by stopping the operation of the motor 11 using the signal, and in some cases, It is also possible to control the oil passage so that all of the hydraulic oil is returned to the hydraulic tank T.

The second pressure switch 70 senses the pressure of the operating oil supplied to the cylinder 1 in a state where the water gate is closed, and when the operating oil pressure of the cylinder 1 reaches a preset reference pressure value, It is determined that the water level on the upstream side has reached the allowable value and the automatic opening of the water gate is performed.

More specifically, the second pressure switch 70 is connected to a hydraulic line connected to the extension port 1a of the cylinder 1 to sense the hydraulic oil pressure on the extension port 1a side, When the value is reached, a signal is generated.

A first valve 80 for controlling the oil passage so that the hydraulic oil on the extension port 1a side can be discharged to the hydraulic tank T in response to the signal is provided to the second pressure switch 70, (L1) connected to the hydraulic tank (T) from the hydraulic pump (1a).

According to this structure, when a signal is generated from the second pressure switch 70, the first valve 80 operates to open the flow path of the return line L 1, thereby automatically opening the water gate.

The second valve 90 closes the flow path of the return line L1 while switching the directional valve 20 for normal operation of the cylinder 1.

The second valve 90 is installed in the return line L1 so as to be positioned between the first valve 80 and the cylinder 1 and the second valve 90 is normally closed The flow path of the return line L1 is opened and the flow path of the return line L1 is closed when the direction switching valve 20 for operating the cylinder 1 is switched.

The second valve 90 is operated such that the hydraulic oil introduced into the expansion port 1a of the cylinder 1 or discharged through the expansion port 1a flows through the return line L1 into the hydraulic tank T To prevent leakage to the outside.

When the return line L1 is opened by the first valve 80, a part of the operating oil returned to the hydraulic tank T through the return line L1 is supplied to the shrinkable port 1b of the cylinder 1, And a compensation line L2 for connecting the return line L1 and the shrinkage port 1b of the cylinder 1 so as to compensate for insufficient hydraulic oil on the shrinkage port 1b side, There is provided a check valve 100 which prevents the working fluid of the shrinking port 1b from flowing to the return line L1.

2 is a structural view of a hydraulic control apparatus for extending a cylinder.

FIG. 2 shows a state in which a conductive water gate rises due to extension of the cylinder to close the water channel.

2, when the directional control valve 20 is switched upward with the operation of the pump 10, the hydraulic fluid that has passed through the directional control valve 20 passes through the one-way throttling valve 50, And the branch valve 40 distributes the flow rate of the hydraulic oil to each cylinder 1 and supplies the same.

On the other hand, the operating oil supplied from the sorting valve 40 to the cylinder 1 flows into the elongate port 1a of the cylinder 1 and pushes the piston, whereby the cylinder is elongated. At this time, And the water channel is closed.

As described above, in the hydraulic control apparatus according to the present invention, the flow rate of the hydraulic fluid is uniformly distributed to the plurality of cylinders 1 using the sorting valve 40, so that even when different loads act on the cylinders 1, Thereby providing an environment that can stably operate without spoiling.

In addition, when the pressure of the hydraulic oil increases due to abnormal operation of the water gate in the opening operation or closing operation of the water gate, the first pressure switch 60 senses this and stops the operation of the motor 11, It is possible to prevent the breakage or the damage of the related parts.

3 is a structural view of the inflow control apparatus when the watercourse is automatically opened due to an increase in the upstream water level.

The pressure of the hydraulic fluid on the extension port 1a side of the cylinder 1 increases in proportion to the pressure acting on the water gate when the water level on the upstream side increases while the water gate is standing up and the water channel is closed, The pressure switch 70 generates a signal for opening the first valve 80 when the pressure of the hydraulic fluid on the extension port 1a side of the cylinder 1 reaches a preset reference pressure, 1 valve 80 opens the return line L1.

Therefore, the working oil on the extension port 1a side of the cylinder 1 flows along the return line L1 and is discharged to the hydraulic tank T, and some of the working oil flows along the compensation line L2 to the shrinkable port (1b).

As described above, the hydraulic control apparatus according to the present invention has a structure for automatically detecting the pressure of the hydraulic fluid and automatically opening the gate when necessary, thereby eliminating the need for a water level sensor for sensing a change in the water level in the upstream.

4 is a structural view of a hydraulic control apparatus when the cylinder is contracted.

Fig. 4 shows a state in which a conductive water gate is conducted due to shrinkage of the cylinder to open the water channel.

4, when the directional control valve 20 is switched to the downward direction together with the operation of the pump 10, the hydraulic fluid that has passed through the directional control valve 20 is supplied to the contraction port 1b of the cylinder 1 And the piston is moved to the extension port 1a side, thereby causing the cylinder 1 to contract and conduct the water gate.

On the other hand, the hydraulic fluid filled in the expansion port 1a of each cylinder 1 is returned to the hydraulic tank T sequentially through the branch valve 40, the one-way throttling valve 50 and the direction switching valve 20, The sorting valve (40) keeps the flow rate of the operating oil discharged from the two cylinders (1) at the same level, thereby preventing the water gate from twisting during the conduction process of the water gate.

In addition, by controlling the flow rate of the hydraulic fluid flowing through the one-way throttle valve (50) to the direction switching valve (20) to be constant, it is possible to prevent the gate from being opened suddenly.

As described above, the hydraulic control apparatus for a moving beam according to the present invention is a hydraulic control apparatus for a movable beam so as to uniformly distribute the flow rate of hydraulic fluid to each cylinder for operating the hydraulic gate so that the hydraulic gate can be moved constantly without irregularity even if force imbalance occurs in the cylinder. , The hydraulic gate can be prevented from being suddenly closed due to the hydraulic pressure or the operator's hand when opening the water gate, the pressure of the working oil can be sensed by using the first pressure switch and the second pressure switch, And the automatic opening of the water gate can be performed, thereby preventing damage to the water gate and related parts.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined in the appended claims and their equivalents. Of course, such modifications are within the scope of the claims.

Description of the Related Art
1: cylinder 1a: elongate port
1b: shrink port 10: pump
11: motor 20: direction switching valve
30: pilot check valve 40:
50: one-way throttle valve 60: first pressure switch
70: second pressure switch 80: first valve
90: Second valve

Claims (6)

1. A hydraulic control device for operating and controlling the cylinder, the hydraulic control device being applied to a movable beam including a plurality of cylinders (1) for moving a water gate for opening and closing the water channel,
A pump 10 that operates by the motor 11 to discharge hydraulic fluid of the hydraulic tank T;
A direction switching valve (20) for controlling the direction in which the cylinder is operated by controlling the direction of the hydraulic fluid supplied to the cylinder (1) by the pump (10);
A pilot check valve (30) for preventing reverse flow of the hydraulic fluid supplied to the cylinder (1); And
And a sorting valve (40) for synchronizing the plurality of cylinders by evenly distributing the flow rate of operating fluid supplied from the directional control valve (20) to the cylinders (1) to each cylinder Hydraulic control device. The method according to claim 1,
A first pressure switch 60 for sensing the pressure of the hydraulic fluid during the operation of the pump 10 and generating a signal for stopping the operation of the pump 10 when the pressure of the hydraulic fluid reaches a predetermined reference pressure value, Further comprising: a hydraulic pressure control unit for controlling the hydraulic pressure of the movable beam. The method according to claim 1,
When the pressure of the working oil on the extension port 1a side of the cylinder 1 is sensed and the pressure of the working oil on the extension port 1a side rises due to the increase of the water level in the upstream side and the preset reference pressure value is reached, A second pressure switch (70) for generating a signal for the first pressure switch;
A first valve (not shown) for opening the return line L1 for connecting the extension port 1a of the cylinder and the hydraulic tank T by a signal generated from the second pressure switch 70, 80) for controlling the hydraulic pressure of the movable beam. The method of claim 3,
And is connected to a return line (L1) connecting the extension port (1a) of the cylinder and the first valve (80), and operates in conjunction with the directional control valve (20) A second valve 90 for switching the return line L1 to close the return line L1 when the flow path to the cylinder is blocked by the direction switching valve 20; Further comprising: a hydraulic pressure control unit for controlling the hydraulic pressure of the movable beam. The method according to claim 1,
Further comprising a one-way throttling valve (50) for regulating the speed at which the water gate is closed by controlling the flow rate of the hydraulic fluid returned from the cylinder to the hydraulic tank (T). The method according to claim 1,
Wherein the directional control valve (20) comprises a proportional control valve for automatically controlling a flow rate of hydraulic oil supplied to the cylinder in accordance with a load acting on the cylinder.

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