KR20150138640A - Fluid pressure control system and method of hydraulic rail switch device - Google Patents

Abstract

The present invention relates to a hydraulic oil pressure control system for a hydraulic track switcher and a control method thereof. The system includes: an operation unit which moves the position of a tongue rail to change the track of a train vehicle; a driving unit which presses and supplies hydraulic oil at a predetermined pressure to drive the operation unit; a sensing unit which senses the hydraulic pressure of the hydraulic oil being supplied to the operation unit from the driving unit; and a control unit which determines a normal status, an abnormal status, or a warning status based on the hydraulic pressure sensed by the sensing unit to control the operation of the driving unit. The control unit can maintain a driving motor driving a gear pump of the driving unit in an active state when the hydraulic pressure is in the warning status to sense the hydraulic pressure of the hydraulic track switcher and monitor whether the hydraulic pressure decreases due to a rise in the viscosity of the hydraulic oil on a real-time basis.

Description

TECHNICAL FIELD [0001] The present invention relates to a hydraulic control system and a hydraulic control system,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an operating hydraulic pressure control system and a control method for a hydraulic line switching device, and more particularly, to a hydraulic pressure line control device for operating a hydraulic line switcher System and a control method.

The line switcher can move the tongue rail inside the main rail to the left and right and selectively connect the tongue rail to the pair of main rails so that the railway vehicle traveling along the main rail of the railroad can enter the desired direction It is a device to change course so that

These line diverters are classified into mechanical line diverters, electric line diverters, and hydraulic line diverters.

Generally, the electric line converter is composed of a friction clutch, an electromagnetic clutch, a gear, and an AC motor. It operates in the order of an electric motor, a clutch and a gear, .

This type of electric railway switchgear is relatively heavy, so it is difficult to carry and store in case of emergency recovery or emergency training. Even if maintenance, maintenance and inspection work is carried out periodically, the amount of close contact between main rail and tongue rail, There is a problem that the windings and the gears of the motor are damaged.

The following patent documents 1 and 2 disclose a hydraulic line converter technology.

Patent Document 1 discloses at least one guide block which is installed between main rails and in which a guide rod is slidably installed, first and second extended connecting portions provided respectively at the ends of the guide rod and extending to opposite sides, A driving unit that is supported by the guide block and transfers the first and second closely-coupled connections supported on both sides of the guide rod to the left and right, an insulating member is interposed between the first and second extended connections, And a first and a second connecting means for connecting the extension connecting portion and the tongue rail.

In Patent Document 2, there are shown a directional control valve for controlling the flow direction of the working fluid supplied through the hydraulic pressure supply means, a plurality of first and second flow distributing means for respectively dividing the working fluid passing through the directional control valve, The rod at both ends fixed to the end portion is connected to the first and second flow rate distributing means and the same flow rate is supplied from the first flow rate distributing means or the second flow rate distributing means, And a plurality of rod cylinders arranged in parallel arranged to be switched to the two-rod cylinders.

Korean Patent Registration No. 10-0834100 (issued on June 2, 2008) Korea Patent Registration No. 10-1331612 (Announcement on Nov. 22, 2013)

On the other hand, since the hydraulic line converter is installed outdoors, it is affected by the surrounding environment such as temperature, moisture, and dust.

In particular, the hydraulic fluid used in the hydraulic line installed in the hydraulic line converter varies in viscosity depending on the ambient temperature. That is, the viscosity of the working oil is lowered when the temperature rises, and sharply rises when the temperature rises.

Therefore, during the winter season, the viscosity of the hydraulic fluid suddenly rises and the feed speed of the hydraulic cylinder is slowed down, so that the speed of line conversion is also slowed down.

The hydraulic line line converter according to the related art has a problem in that the operating temperature of the line converter is increased, and in particular, the viscosity of the hydraulic oil increases at a temperature below freezing in the winter season.

In order to solve these problems, the operating oil having a small change in viscosity according to the temperature was used to maintain the performance at a subzero temperature without deteriorating the speed. However, there was a limit to prevent a rapid increase in viscosity at an extreme cold.

SUMMARY OF THE INVENTION An object of the present invention is to provide an operating hydraulic pressure control system and a control method for a hydraulic line switching device that controls the operating oil pressure supplied to a line switching device to be constant regardless of a change in the surrounding environment will be.

It is another object of the present invention to provide an operating hydraulic pressure control system and method for a hydraulic line switching device that prevents malfunction of a line switching device due to an increase in viscosity of operating fluid by controlling the viscosity of the operating fluid in accordance with temperature changes in winter season.

It is still another object of the present invention to provide an operating hydraulic pressure control system and control method for a hydraulic line switch that can control driving of a driving motor using three signals of normal, warning, and stop according to the operating hydraulic pressure.

In order to achieve the above-mentioned object, an operating hydraulic pressure control system of a hydraulic type line switch according to the present invention includes an operation part for moving a tongue rail to change the course of a railway vehicle, A sensing unit for sensing an operating oil pressure of the operating oil supplied from the driving unit to the operating unit, and a control unit for controlling driving of the driving unit based on the normal, abnormal, and warning conditions based on the operating oil pressure sensed by the sensing unit And the control unit maintains the driving motor for driving the gear pump of the driving unit in a running state in the warning state of the operating oil pressure.

The hydraulic line switching device further includes a manual driving part for supplying the operating oil to the operating part by manual operation and a pressure adjusting part for adjusting the pressure of the operating oil circulating between the driving part and the operating part to be kept constant at a predetermined set pressure The sensing unit is connected to first and second supply lines that supply operating oil from the driving unit to the operating unit, respectively. The sensing unit senses the operating oil pressure of the operating oil supplied to the operating unit through the first and second supply lines. 2 detection unit.

The operating hydraulic pressure control system of the hydraulic type line switch according to the present invention further includes a warning part for informing a warning state and an abnormal state of the operating oil pressure, and the control part controls the operation of the hydraulic line switching device, A memory for storing a reference pressure and a limit pressure that are preset to determine a state of the engine; a determination unit for determining whether the engine is in a normal state, an abnormal state, or a warning state according to the operating oil pressure sensed by the sensing unit; And a signal generator for generating a control signal including a warning signal.

The operating hydraulic pressure control system of the hydraulic line switch according to the present invention further includes a heating unit for heating the hydraulic oil when the operating state of the operating oil pressure is generated and the heating unit is installed in the hydraulic manifold block of the driving unit, And a second heater module installed in the accumulator provided in the pressure regulating part in which the first heater module and the working fluid are temporarily stored.

According to another aspect of the present invention, there is provided a hydraulic line pressure control method for a hydraulic line switching device, comprising the steps of: (a) driving a gear pump of a drive unit to supply hydraulic oil through a first supply line or a second supply line, (B) sensing the operating oil pressure of the hydraulic fluid supplied through the first supply line or the second supply line; (c) (D) comparing the reference hydraulic pressure and the threshold hydraulic pressure to determine a normal state and an abnormal state of the operating oil pressure and the operating oil pressure sensed by the reference oil pressure sensor, And maintaining the operating state of the driving motor for driving the gear pump and guiding the generation of the warning state, if there is a gap between the oil pressure and the oil pressure.

(E) stopping the driving of the driving motor if the operating oil pressure detected as a result of the comparison in the step (c) is lower than the threshold oil pressure, (d) is performed by driving the first and second heater modules installed in the hydraulic manifold block of the driving unit and the accumulator of the pressure control unit, in which all the hydraulic oil passes, and the hydraulic oil is heated.

As described above, according to the operating hydraulic pressure control system and the control method of the hydraulic type line switch according to the present invention, it is possible to detect whether the operating hydraulic pressure of the hydraulic line switching device is lowered due to an increase in viscosity of the hydraulic oil in the winter season Can be obtained.

According to the present invention, driving of the drive motor is controlled by using three signals of stop, warning, and stop according to the operating oil pressure of the operating oil. Therefore, even when a warning signal is generated, the drive motor is kept in the operating state and measures The effect that the downtime of the hydraulic line converter can be minimized can be obtained.

Thus, according to the present invention, it is possible to prevent an accident of a railway vehicle caused by a faulty operation of a hydraulic line switching device by preventing an operation speed drop and a functional deterioration of a hydraulic line switching device due to a change in operating oil pressure .

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram of a hydraulic line converter and its operating hydraulic control system according to a preferred embodiment of the present invention;
FIG. 2 is a detailed block diagram of the hydraulic line switch and its operating hydraulic control system shown in FIG. 1;
FIG. 3 is a flow chart for explaining steps of a method for operating hydraulic oil pressure of a hydraulic line converter according to a preferred embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an operating hydraulic pressure control system and a control method of a hydraulic line converter according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram of a hydraulic line converter according to a preferred embodiment of the present invention and its operating hydraulic control system.

1, the hydraulic line switch according to a preferred embodiment of the present invention includes an operation portion 10 for moving the position of a tongue rail (not shown) to change the course of a railway vehicle, an operation portion 10, A sensing unit 30 for sensing the operating oil pressure of the operating oil supplied from the driving unit 20 to the operating unit 10, And a control unit (40) for controlling the driving of the driving unit (20) based on the operating oil pressure sensed by the sensing unit (30).

The hydraulic type line switch according to the preferred embodiment of the present invention operates in conjunction with a manual driving part 50 and a driving part 20 that supply operating fluid to the operating part 10 by manual operation when an error occurs in the driving part 20 And a pressure regulator 60 for regulating the pressure of the hydraulic fluid circulating between the first and second hydraulic cylinders 10 and 10 so as to be constantly maintained at a predetermined set pressure.

2, the detailed structure of a hydraulic line converter according to a preferred embodiment of the present invention will be described.

FIG. 2 is a detailed block diagram of the hydraulic line switch shown in FIG. 1 and its operating hydraulic pressure control system.

2, the operating portion 10 includes at least one cylinder 11 which is operated by receiving operating fluid from the driving portion 20, a pair of tongue rails provided on both sides of the respective cylinders 11, And may include first and second rods 12 and 13 that are stretchable and contractable to come in contact with or separate from a rail (not shown).

In this embodiment, the actuating part 10 may include three double acting cylinders connected in series, as shown in FIG. Of course, the present invention can be modified to provide one, two, or more than four cylinders 11 to the operating portion 10 depending on the size and weight of the tongue rail.

Each of the cylinders 11 may be arranged in parallel with each other and a connecting line 14 may be provided between each of the cylinders 11 to sequentially supply operating fluid to the respective cylinders 11. [

2, the connection line 14 is connected between the right end of the first cylinder 111 and the left end of the second cylinder 112 from the top and the right end of the second cylinder 112 and the third cylinder 113, As shown in FIG.

Accordingly, the cylinders 11 are sequentially supplied with the operating fluid, and the first and second rods 12 and 13 can be expanded and contracted in the same direction.

On the other hand, a pair of auxiliary connection lines are provided between the respective connection lines 14 and between the first and second supply lines 23, 24 and the connection line 14 to be described below, Relief valves may be provided, respectively.

One end of each of the first and second rods 12 and 13 is coupled to the cylinder 11 and the other end of the first and second rods 12 and 13 is connected to the first and second tongues.

For example, when the first rod 12 coupled to the left side of the cylinder 11 is operated to extend, the first tongue rail located on the left side of the cylinder 11 is brought into close contact with the main rail, The second tongue rail located on the right side of the cylinder 11 is separated from the main rail while the second rod 13 coupled to the right side of the center is contracted.

The state in which the first tongue and the main rail are in close contact with each other is referred to as a normal state for straight running of the railway car.

On the other hand, when the first rod 12 contracts, the first tongue rail is separated from the main rail, and the second tongue rail is brought into close contact with the main rail while the second rod 13 is extended.

The state in which the second tongue and the main rail are in close contact with each other is referred to as a reverse state in order to change the traveling path of the railway car.

The driving unit 20 is connected to the driving motor 21 and the driving motor which are capable of normal and reverse rotations so as to drive the respective cylinders 11 of the operating unit 10 in a normal or inverted state, And a gear pump 22 pumped to supply the fuel to the engine 10.

First and second supply lines 23 and 24 for supplying operating fluid to the operating portion 10 and the manual driving portion 50 may be connected to both sides of the gear pump 22.

Each of the first and second supply lines 23 and 24 is provided with a check valve and the second supply line 24 may be provided with a filter module for removing foreign substances contained in the operating oil.

The first and second transfer lines 25 and 26 for transmitting the operating fluid to the manual driving unit 50 are connected to the first and second branch points M1 and M2 on the first and second supply lines 23 and 24 , The first and second transfer lines 25 and 26 may be joined and connected to one side of the pilot valve () of the manual drive part 50 to be described below.

The first and second branch points M1 and M2 are connected to first and second bypass lines 27 and 27 for bypassing the hydraulic fluid pumped by the gear pump 22 to the check valves provided on the second and first supply lines, , 28) can be connected.

The first and second supply lines 23 and 24 may be connected to first and second control lines 66 and 67 connected to the accumulator 61 of the pressure regulating unit 60 to be described below.

The first and second control lines 66 and 27 are joined to each other and connected to the accumulator 61 and between the accumulator 61 and the gear pump 22, A return line 68 may be connected to return the hydraulic fluid traveling through the lines 66 and 67 to the gear pump 22.

The return line 68 may be connected to a supplementary line 69 for replenishing the operating fluid or discharging a part of the operating fluid according to the operating oil pressure change.

The manual drive part 50 is provided with a pilot valve 52 installed at a portion where the manual pump 51, the first and second supply lines 23 and 24 are joined and the hydraulic oil pressurized by the manual pump 51, Or a directional control valve 53 for switching the supply direction of the hydraulic oil to supply the hydraulic oil to the second supply lines 23 and 24.

The pilot valve 52 may be provided as a two-port manual switching valve that is opened and closed by operating fluid supplied through the first and second supply lines 23 and 24.

The directional control valve 53 may be provided with a control signal of the control unit 40 or a two-way control valve for changing the supply direction of the operating oil by manual operation.

The pressure regulator 60 includes an accumulator 61 for temporarily storing the hydraulic fluid supplied through the first and second regulating lines 66 and 67, first and second regulating lines 66 and 67, an accumulator 61, A throttle valve 62 provided between the throttle valve 62 and the throttle valve 62 for controlling the flow rate of the operating oil and a relief valve 63 for discharging the operating oil to the outside when the pressure of the operating oil exceeds a predetermined threshold pressure, And a pressure switch (not shown) provided between the relief valve 63 and the accumulator 61 for opening and closing the electrical contact when the pressure of the working oil exceeds a preset limit pressure 65).

The pressure switch 65 is connected in parallel to the first control line 66. The pressure switch 65 compares the operating oil pressure with a preset reference pressure and a preset pressure to determine whether the operating oil pressure is normal, , And the electrical contact can be opened or closed to cut off the power supplied to the drive motor 21 or to turn on the warning lamp according to the comparison result.

In the meantime, in the present embodiment, the hydraulic line switcher is provided with the operating portion, the driving portion, the manual driving portion, and the pressure adjusting portion, and the structure of the line through which the operating oil moves between the respective devices has been described in detail. However, the present invention is not limited thereto , The configuration of the actuating part and the driving part, the configuration of the manual driving part and the pressure adjusting part, and the configuration of the movement line of the operating oil may be variously changed.

The sensing unit 30 is connected to the first and second supply lines 23 and 24 so that the operating oil pressure of the operating oil supplied to the operating unit 10 through the first and second supply lines 23 and 24 And may include first and second sensing units 31,

The first and second sensing units 31 and 32 transmit a sensed signal sensed by the operating hydraulic pressure to the controller 40.

On the other hand, a heating unit (not shown) for heating the hydraulic oil at a temperature below freezing in the hydraulic manifold block of the driving unit 20 and the accumulator 61 of the pressure regulating unit 60, .

The heating unit functions to heat the operating oil to prevent the operating oil pressure from being lowered due to a change in temperature around the vehicle, in particular, an increase in the viscosity of the working oil as the air temperature decreases during the winter season.

To this end, the heating unit may include a first heater module installed in the driving unit 20, which is a route through which all the working oil flows, and a second heater module installed in the accumulator in which the working oil is temporarily stored.

The first heater module may be a rubber heater installed at the lower end of the hydraulic manifold block of the driving unit 20 and the second heater module may be provided by a rubber heater installed at the outer circumferential surface of the accumulator 61.

The heating unit may be driven according to a control signal of the control unit 40, or may be driven by receiving a sensing signal of the sensing unit 30 directly.

1, the control unit 40 determines whether the operating oil pressure is normal, abnormal, or warning based on the operating oil pressure sensed by the sensing unit 30, and controls driving of the driving unit 20 according to the determination result Normal, abnormal, and warning signals.

The controller 40 may generate a control signal for controlling the operation of the warning unit 70 so as to guide the manager to the warning state of the operating oil pressure when it is determined that the warning state is established.

To this end, the operating hydraulic pressure control system of the hydraulic line converter according to the preferred embodiment of the present invention may further include an alarm unit 70 for guiding the warning state and the abnormal state of the operating oil pressure.

The warning unit 70 may include a warning lamp 71 that operates or flashes when the operating oil pressure is in a warning state or an abnormal state, and a speaker 72 that outputs a warning sound.

The warning lamp 71 and the speaker 72 can be turned on or off in different ways when the operating state of the operating oil pressure and the abnormal state are generated.

The control unit 40 may generate a control signal for controlling the operation of the heating unit to heat the operating oil when the operating oil pressure sensed by the sensing unit 30 is lower than a preset reference pressure.

For example, the control unit 40 compares the operating oil pressure sensed by the first or second sensing unit 31 or 32 with a preset reference pressure, and determines whether the operating oil pressure is normal, abnormal or warning state Can be determined.

If the reference pressure is set to about 2 bar, the control unit 40 determines that the sensed operating oil pressure is equal to or higher than the reference pressure, If it is within the limit pressure, it can be judged as a warning condition.

Thus, the control unit 40 can generate a control signal to drive the heater module provided in the heating unit if the operation oil pressure is in the warning state.

The control unit 40 compares the operating oil temperature sensed by the temperature sensor provided in the heating unit with a predetermined set temperature, and selectively drives the heating unit according to the comparison result.

For example, the control unit 40 may generate a control signal to drive the first and second heater modules if the operating oil temperature sensed by the temperature sensor provided in the heating unit is lower than a first reference temperature set at about 0 ° C.

On the other hand, if the operating oil temperature sensed by the temperature sensing sensor is greater than or equal to a second reference temperature set at about 120 ° C, the control unit 40 may generate a control signal to stop driving the first and second heater modules.

To this end, the control unit 40 includes a memory 41 for storing a driving program for driving the hydraulic line converter and a reference pressure and a limiting pressure for determining normal, abnormal, and warning conditions of the operating oil pressure, A signal generator 43 for generating a control signal including normal, abnormal, and warning signals according to the determination result of the determination unit 42 and the determination unit 42, . ≪ / RTI >

The control unit 70 may be a central control unit provided in the control room or may be provided as a separate control unit communicably connected to the central control unit so as to control the operation of the hydraulic line switching unit.

Next, referring to FIG. 3, a detailed description will be made of a method for controlling the operating hydraulic pressure of the hydraulic line converter according to the preferred embodiment of the present invention.

3 is a flowchart illustrating steps of a method for controlling hydraulic pressure in a hydraulic line converter according to a preferred embodiment of the present invention.

3, the control unit 40 of the hydraulic line switching unit drives the gear pump 22 using the driving force generated by driving the driving motor 21 of the driving unit 20. As shown in FIG.

Then, the gear pump 22 pressurizes the operating oil by a pumping operation.

The operating fluid is sequentially supplied to the respective cylinders 11 of the actuating part 10 through the first supply line 23 and the second supply line 24 in accordance with the rotational direction of the drive motor 20. [

Thus, each cylinder 11 extends the first rod 12 to bring the first tongue rail and the main rail into close contact with each other, thereby achieving a normal state for straight running of the railway car, The second tongue rail and the main rail are brought into contact with each other, thereby attaining a state of being able to change the traveling route of the railway car.

The first and second sensing units 31 and 32 of the sensing unit 30 sense the operating oil pressure of the operating oil supplied to each of the cylinders 11 and transmit the sensed operating oil pressure to the control unit 40 (S12).

In step S14, the controller 40 compares the operating oil pressure detected by the first or second sensing unit 31 or 32 with the reference oil pressure set at about 2 bar.

If the sensed operating oil pressure is equal to or greater than the reference oil pressure as a result of the comparison in step S14, the determination unit 42 of the control unit 40 determines that the operating oil is in a normal state, and the signal generation unit 43 continuously drives the drive motor 21 A normal control signal is generated and transmitted to the driving unit 20.

On the other hand, if it is determined in operation S14 that the sensed operating oil pressure is less than the reference oil pressure, the controller 40 compares the sensed operating oil pressure with a threshold oil pressure set at about 0.5 bar (S16).

If the sensed operating oil pressure is less than the threshold oil pressure as a result of the comparison in step S16, the determination unit 42 of the control unit 40 determines that the operating oil is abnormal.

Then, the signal generating section 43 generates and transmits a stop control signal to the driving section 20 so as to stop the driving of the driving motor 21. Thus, the drive of the drive motor 21 is stopped (S18), and the operation of the hydraulic line converter is terminated.

At this time, the control unit 40 generates a control signal for controlling the operation of the warning unit 70 so as to guide the abnormality of the operating oil pressure to the manager. Thus, the warning unit 70 is driven to turn on or blink the warning lamp 71, and the speaker 72 outputs a warning sound to inform the manager of an abnormal condition (S20).

If it is determined in step S16 that the sensed operating oil pressure is higher than the threshold oil pressure, the determination unit 42 of the control unit 40 determines that the operating oil is in a warning state. And transmits the warning control signal to the driving unit 22. [ Thus, the driving motor 21 is continuously driven to maintain the driving state (S22).

At the same time, the control unit 40 generates a control signal for controlling the operation of the warning unit 70 so as to guide the manager of the warning state of the operating oil. Thus, the warning unit 70 is driven to turn on or blink the warning lamp 71, and the speaker 72 outputs a warning sound to inform the manager of the warning state (S24).

Accordingly, the manager can easily confirm the warning state of the operating pressure, and can quickly take measures such as replenishing the work oil through the supplementary line.

As described above, according to the present invention, the operating oil pressure of the operating oil is monitored in real time to determine whether the operating oil pressure is abnormal or the warning state, and the warning unit is driven so that the manager can quickly respond to the operational oil pressure abnormality.

On the other hand, in step S24, the control unit 40 may generate a control signal to drive the heating unit.

Then, the heating unit is turned on in accordance with the control signal of the control unit 40 to drive the first heater module installed in the hydraulic manifold block of the driving unit 20 and the second heater module installed in the accumulator to heat the operating oil.

As described above, the present invention can continuously monitor the operating oil pressure of the operating oil and monitor in real time whether the operating oil pressure is abnormal or the warning condition is generated as the operating oil pressure decreases as the viscosity of the operating oil increases during the winter season.

Therefore, the present invention can quickly stop the operation of the drive unit when an abnormal operation oil pressure is generated and maintain the hydraulic oil line switch in a continuously operating state by performing actions such as replenishing the operating oil in the operating state of the drive unit.

Accordingly, the present invention can prevent an accident of a railway vehicle caused by an abnormality in the operation of a hydraulic line switching device or a hydraulic line line switching device by preventing the operation speed of the hydraulic line switching device from decreasing or decreasing.

At this time, the control unit 40 may control to selectively drive the heating unit according to the operating oil temperature sensed by the temperature sensor installed in the hydraulic manifold block and the accumulator.

Accordingly, the present invention can effectively prevent the viscosity drop of the operating oil due to the subzero temperature in the winter season, and can prevent the operating oil from being overheated by driving the heating unit.

On the other hand, in step S26, after the controller 40 replenishes the operating fluid and drives the heating section to heat the operating fluid, the operating pressure of the operating fluid re-sensed by the first and second sensing units 31, And the reference pressure.

If it is determined in step S26 that the re-sensed operating oil pressure is lower than the reference pressure, the control unit 40 proceeds to step S22 to determine whether the operating oil pressure of the warning unit 70 and the driving unit 20 It is possible to control to maintain the driving state.

On the other hand, if it is determined in operation S26 that the re-sensed operating oil pressure is equal to or higher than the reference pressure, the controller 40 determines that the viscosity of the operating oil is in a normal state, And controls the driving of the switching device.

Through the above-described process, the present invention can continuously monitor the operating oil pressure of the hydraulic line converter and monitor whether the normal, warning, or abnormal state occurs due to the increase of the viscosity of the operating oil in winter have.

Although the invention made by the present inventors has been described concretely with reference to the above embodiments, the present invention is not limited to the above embodiments, and it goes without saying that various changes can be made without departing from the gist of the present invention.

Meanwhile, in the above-described embodiment, at least one cylinder is connected to the actuating part in series, but the present invention is not limited thereto, and at least one cylinder may be connected in parallel.

The present invention relates to an operating hydraulic pressure control technology of a hydraulic line switching device that continuously monitors the operating hydraulic pressure of a hydraulic line switching device and monitors in real time whether a normal, warning, or abnormal condition occurs as the operating hydraulic pressure is lowered due to an increase in viscosity of the hydraulic fluid during the winter season .

10: Operation part 11: Cylinder
12, 13: first and second rods 14: connecting line
20: driving part 21: driving motor
22: gear pump 23, 24: first and second supply lines
25, 26: first and second transmission lines 27, 28: first and second transmission lines 27,
29: Hydraulic manifold block 30:
31, 32: first and second sensing units 40:
41: memory 42:
43: Signal generator 50: Manual driver
51: Manual pump 52: Pilot valve
53: Direction control valve 60: Pressure regulator
61: accumulator 62: throttle valve
63: relief valve 64: pressure gauge
65: pressure switch 66, 67: first and second control lines
68: return line 69: supplementary line
70: Warning part 71: Warning lamp
72: Speaker

Claims (6)

And a drive unit for driving the operation unit by supplying an operation unit for moving the position of the tongue rail so as to change the course of the railway car and a hydraulic oil at a predetermined pressure to drive the operation unit,
A sensing unit for sensing an operating oil pressure of the operating oil supplied from the driving unit to the operating unit,
And a control unit for determining the normal, abnormal, and warning conditions based on the operating oil pressure sensed by the sensing unit and controlling the driving of the driving unit,
Wherein the control unit maintains the drive motor for driving the gear pump of the drive unit in an operating state in a warning state of the operating oil pressure. The method according to claim 1,
The hydraulic line switching device includes a manual driving part for supplying operating oil to the operating part by manual operation,
Further comprising a pressure regulator for regulating the pressure of the operating fluid circulating between the driving unit and the operating unit to be maintained at a preset set pressure,
The sensing unit is connected to first and second supply lines that supply operating oil from the driving unit to the operating unit, respectively. The sensing unit senses the operating oil pressure of the operating oil supplied to the operating unit through the first and second supply lines. And a sensing unit for sensing the hydraulic pressure in the hydraulic circuit. 3. The method according to claim 1 or 2,
Further comprising a warning section for guiding the warning state and the abnormal state of the operating oil pressure,
The control unit includes a memory for storing a driving program for driving the hydraulic line converter and a reference pressure and a limiting pressure preset to determine a normal, abnormal, and warning state of the operating oil pressure,
A determination unit for determining whether a normal state, an abnormal state, and a warning state are established according to the operating oil pressure sensed by the sensing unit;
And a signal generator for generating a control signal including normal, abnormal, and warning signals according to the determination result of the determination unit. The method of claim 3,
Further comprising a heating unit for heating the operating oil when the operating state of the operating oil pressure is generated,
The heating unit includes a first heater module installed in a hydraulic manifold block of the driving unit,
And a second heater module installed in an accumulator provided in the pressure regulating part for temporarily storing hydraulic fluid. (a) driving a gear pump of a driving unit to supply operating oil through a first supply line or a second supply line to drive at least one cylinder provided in the operating unit to switch lines;
(b) sensing an operating hydraulic pressure of operating fluid supplied through the first supply line or the second supply line,
(c) comparing the reference oil pressure and the threshold oil pressure preset to determine the steady state and the abnormal state of the operating oil pressure and the operating oil pressure sensed in the step (b); and
(d) if the sensed operating oil pressure is between the reference oil pressure and the threshold oil pressure as a result of the comparison in the step (c), maintaining the operating state of the driving motor for driving the gear pump and guiding the generation of the warning state Wherein the hydraulic pressure in the hydraulic line switching device is controlled in accordance with the hydraulic pressure. 6. The method of claim 5,
(e) stopping the driving of the driving motor when the sensed operating oil pressure is lower than the threshold oil pressure as a result of the comparison in the step (c)
Wherein the step (d) comprises heating the hydraulic fluid by driving the first and second heater modules installed in the hydraulic manifold block of the driving unit and the accumulator of the pressure control unit, Hydraulic control method of operating hydraulic line switch.

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