KR101657619B1 - Flushing unit of hydraulic actuator for power plant - Google Patents

Abstract

A flushing unit of a hydraulic actuator for a power plant according to the present invention comprises a first flushing block attached to a hydraulic actuator and provided with a first flushing block having a first flushing port provided with hydraulic oil and a first flushing port provided with hydraulic oil provided from a first flushing port, A first flushing block assembly mounted on the block and having a first switching portion switched to either supply hydraulic fluid to either the first port A or the port B or to block the supply of hydraulic fluid to the first P port; And a second flushing block attached to the hydraulic actuator and provided with a second port through which hydraulic fluid provided from a second P port and a second P port provided with hydraulic oil are formed and a second flushing block mounted to the second flushing block, And a second flushing block assembly having a second switching portion that is switched to shut off hydraulic oil supply to the port. Thus, according to the switching operation of the first switching unit of the first flushing block assembly and the second switching unit of the second flushing block assembly, the hydraulic fluid channel of the hydraulic actuator and the hydraulic actuator interior are flushed to shorten the flushing process time of the hydraulic actuator Therefore, it is possible to minimize the power plant downtime and reduce cost.

Description

TECHNICAL FIELD [0001] The present invention relates to a flushing unit of a hydraulic actuator for a power plant,

The present invention relates to a flushing unit of a hydraulic actuator for a power plant, and more particularly, to a flushing unit of a hydraulic actuator for a power plant turbine that flushes a hydraulic actuator for a power plant that opens and closes a turbine valve of a power plant.

The output of the turbine producing electricity at the plant is regulated by the supply and cutoff of the steam. Specifically, the supply and interruption of the steam to the turbine is accomplished by opening and closing the opening through which the steam is supplied to the turbine by the opening and closing operation of the turbine valve. Here, the operation of the turbine valve is controlled in association with the operation of the hydraulic actuator for the power plant connected to the turbine valve.

The operation of the hydraulic actuator is performed by the reciprocating movement of the piston in the cylinder by the hydraulic pressure of the hydraulic oil supplied to and discharged from the inside and outside of the cylinder, and the turbine valve opens and closes the opening of the steam in conjunction therewith. In the interior of the hydraulic actuator, there are formed flow paths through which hydraulic fluid flows, such as a flow path of hydraulic fluid drawn into and out of the cylinder. The hydraulic oil in which the foreign matter floats due to the operation of the hydraulic actuator can flow or the foreign matter floating in the hydraulic oil can be attached to the inner wall of the pipe forming the flow passage due to the operation of the hydraulic actuator and thus the operation reliability of the hydraulic actuator can be influenced And may adversely affect the operation of the turbine valve. Thus, the hydraulic actuator needs to be cleaned, that is, to remove elements such as foreign matter adhering to the cylinder and pipe inner wall through the flushing process.

1 is a first operational cross-sectional view of a hydraulic actuator for a power plant and a conventional flushing apparatus, and Fig. 2 is a second operational cross-sectional view of a hydraulic actuator for a power plant and a conventional flushing apparatus.

As shown in Figs. 1 and 2, the hydraulic actuator H includes a piston PT for providing a driving force to a turbine valve (not shown), a space in which the piston PT is translationally moved, And a disk dump valve (DDV) provided to quickly close the opening of the cylinder (CY) and the steam in an emergency situation of the turbine valve. The hydraulic actuator H is provided with a hydraulic actuator H for supplying hydraulic fluid to the piston PT of the hydraulic actuator H and an FAS line F of a fluid actuator supply F 1 and a disk dump valve DDV The FCD line (F3) of the fluid drain to cooler (F3) oil (F3), which is the oil discharged from the ETS line (E) and the hydraulic actuator (H) of the emergency trip supply (ETS) FC) is formed.

The conventional flushing apparatus includes the first to third flushing blocks 1100, 1300 and 1500. The conventional flushing apparatus must replace the first flushing block 1100 of the first to third flushing blocks 1100, 1300, and 1500 according to the object to be flushed. When sequentially sequentially flushing the inside of the cylinder CY of the ETS line E, the FAS line F and the hydraulic actuator H, the first flushing block 1100 of the first to third flushing blocks 1100, 1300, (1100) must be replaced.

Therefore, the conventional flushing apparatus has a problem that the work time of the flushing work process is increased due to the replacement of the flushing block, and the labor of the worker is increased. In addition, in the conventional flushing apparatus, the manual flushing process by the operator increases the stoppage time of the power plant equipment, thereby lowering the productivity of the power plant, resulting in an increase in cost loss.

Korean Patent Registration No. 10-0504382; Oil cleaning apparatus equipped with external oil heater and oil cleaning method using same

An object of the present invention is to provide a flushing unit of a hydraulic actuator for a power plant improved in structure to flush the hydraulic actuator without replacement of the flushing block.

It is another object of the present invention to provide a flushing unit of a hydraulic actuator for a power plant having an improved structure so that the flushing process of the hydraulic actuator can be automatically performed.

According to the present invention, there is provided a flushing unit of a hydraulic actuator for a power plant according to the present invention, comprising: a first P port provided with hydraulic oil attached to the hydraulic actuator; a first A port through which hydraulic oil provided from the first P port is supplied; And a first switching unit mounted on the first flushing block and switched to supply hydraulic oil to either the first port A or the B port or to block the supply of hydraulic oil to the first P port, A second flushing block attached to the hydraulic actuator and having a second P port provided with hydraulic fluid and a second A port provided with hydraulic fluid provided from the second P port and a second flushing block mounted on the second flushing block, And a second switch which is switched to shut off supply of hydraulic fluid to the second port or to the second port Power stations, characterized in that a second flushing block assembly having the generic achieved by a flushing unit of a hydraulic actuator.

Here, the hydraulic actuator for a power plant includes an ETS (Emergency Trip Supply) line, a FAS (Fluid Actuating Supply) line and a FCD (Fluid Drain to Cooler) line, and the flushing unit is connected to the ETS line, The inside of the actuator can be sequentially flushed.

Flushing of the ETS line may switch the first switching unit to supply hydraulic fluid from the first P port to the B port, and the second switching unit may switch to shut off hydraulic fluid supply to the second P port.

The flushing of the ETS line may be switched by the first switching unit to drain the hydraulic fluid supplied from the first P port to the B port to the outside of the hydraulic actuator.

Meanwhile, the flushing of the FAS line may switch the first switching unit to shut off hydraulic oil supply to the first P port, and the second switching unit may switch to supply the hydraulic oil from the second P port to the second A port.

The flushing of the FAS line may be such that hydraulic oil supplied to the second A port by switching of the second switching unit is supplied to the inside of the hydraulic actuator and drained to the outside.

In addition, the flushing of the hydraulic actuator may switch the first switching unit to supply the hydraulic oil from the first P port to the first A port, and the second switching unit may switch to block the supply of hydraulic oil to the second P port .,

The supply of hydraulic fluid to either the first port A or the port B and the supply of hydraulic fluid to the second port may be performed when the first switching unit and the second switching unit are energized, respectively.

Meanwhile, hydraulic oil shutoff to the first P port and the second P port may be performed when the first switching unit and the second switching unit are activated.

The first flushing block and the second flushing block measure the pressure and temperature of the hydraulic fluid supplied to the first P port and the second A port, respectively, from the first P port and the second A port, A pressure branching flow path and a temperature branching flow path may be formed.

The details of other embodiments are included in the detailed description and drawings.

The effect of the flushing unit of the hydraulic actuator for a power plant according to the present invention is achieved by flushing the oil hydraulic oil passage of the hydraulic actuator and the hydraulic actuator inside in accordance with the switching operation of the first switching unit of the first flushing block assembly and the second switching unit of the second flushing block assembly The time for flushing the hydraulic actuator can be shortened, so that it is possible to minimize the operation stoppage time of the power plant and reduce the cost.

1 is a first operating sectional view of a hydraulic actuator for a power plant and a conventional flushing device,
2 is a second operational sectional view of a hydraulic actuator for a power plant and a conventional flushing device,
3 is a schematic sectional view of a hydraulic actuator for a power plant and a flushing unit according to the present invention,
4 is a block diagram of a configuration of a flushing unit according to embodiments of the present invention;
5 is a plan view of a first flushing block assembly of a flushing unit of a hydraulic actuator for a power plant according to embodiments of the present invention,
6 is a plan view of a second flushing block assembly of a flushing unit of a hydraulic actuator for a power plant according to a first embodiment of the present invention,
7 is a plan view of a second flushing block assembly of a flushing unit of a hydraulic actuator for a power plant according to a second embodiment of the present invention.

Hereinafter, a flushing unit of a hydraulic actuator for a power plant according to embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Before describing the drawings, the piston, the cylinder, the disk dump valve, the FAS line as the oil passage of the FAS, the ETS line as the oil passage of the ETS and the FCD line as the oil passage of the FCD according to the embodiments of the present invention, 2 are denoted by the same reference numerals for the same component names shown in Figs.

It is to be noted that the first flushing block assembly of the flushing unit of the hydraulic actuator for a power plant according to the present invention is applied to both the first and second embodiments.

It should be noted that the second flushing block assembly among the flushing units of the hydraulic actuator for a power plant according to the first and second embodiments of the present invention has been described with different reference numerals in order to distinguish the embodiments from each other.

FIG. 3 is a schematic cross-sectional view of a hydraulic actuator for a power plant and a flushing unit according to the present invention, FIG. 4 is a block diagram of a configuration of a flushing unit according to one embodiment of the present invention, and FIG. 5 is a schematic view of a hydraulic actuator for a power plant 6 is a plan view of a second flushing block assembly of a flushing unit of a hydraulic actuator for a power plant according to a first embodiment of the present invention.

3 to 6, a flushing unit (hereinafter referred to as a flushing unit) 10 of a hydraulic actuator H for a power plant according to a first embodiment of the present invention includes a first flushing block assembly 100 And a second flushing block assembly 300. In addition, the flushing unit 10 according to the present invention further includes a third flushing block 500.

The hydraulic actuator H for a power plant includes a cylinder CY, a piston PT accommodated in the cylinder CY and translationally driven by hydraulic oil flowing into the cylinder CY and hydraulic oil discharged to the outside. The hydraulic actuator H for the power plant further includes a disk dump valve (DDV) operated by hydraulic oil so as to quickly close the opening of the steam in an emergency, that is, in a trip state.

Here, the hydraulic actuator H for a power plant includes an FAS line F that forms a flow path of a fluid actuator supply FAS (hydraulic actuator oil) that provides hydraulic pressure to the piston PT, The ETS line E forming the flow path of the ETS (Emergency Trip Supply) oil F2 which is the hydraulic fluid providing the pressure and the flow path of the FCD (Fluid Drain to Cooler) F3 discharged to the outside of the hydraulic actuator H And an FCD line (FC) to be formed.

More specifically, the FAS line F forms a flow path for supplying the FAS oil F1 into the cylinder CY so that the hydraulic actuator H is operated. The ETS line E is connected to the hydraulic actuator H Thereby forming a flow path for supplying the ETS oil F2 to provide the fluid dump to the disk dump valve DDV.

The flushing unit 10 according to the first embodiment of the present invention sequentially flushes the inside of the ETS line E, the FAS line F and the hydraulic actuator H, i.e., inside the cylinder CY. Specifically, the flushing unit 10 flushes the ETS line E with the primary cleaning and flushes the FAS line F with the secondary cleaning. Then, the flushing unit 10 flushes the actuating area of the hydraulic actuator H by the third cleaning.

The flushing unit 10 is attached to the hydraulic actuator H to flush the interior of the FAS line F, the ETS line E and the hydraulic actuator H. The flushing unit 10 is connected to a hydraulic oil supply unit and a hydraulic oil discharge unit (not shown). The flushing unit 10 receives the hydraulic oil from the hydraulic oil supply unit and discharges the hydraulic oil to the hydraulic oil discharge unit. The flushing unit 10 includes a first flushing block assembly 100, a second flushing block assembly 300 and a third flushing block 500 as an embodiment of the present invention.

The first flushing block assembly 100 includes a first flushing block 120 and a first switching unit 140. The first flushing block 120 includes a first body 121, a first P port 122, a first A port 123, a B port 124, a first pressure branch channel 125 and a first temperature branch channel 126). The first switching unit 140 is mounted on the first main body 121 and is switched to supply hydraulic oil to either the first port 123 or the B port 124 or to block the supply of hydraulic fluid to the first P port 122 .

The second flushing block assembly 300 includes a second flushing block 320 and a second switching unit 340. The second flushing block 320 includes a second main body 321, a second P port 322, a second A port 323, a second pressure branch channel 325 and a second temperature branch channel 326. The second switching unit 340 is mounted on the second main body 321 and is switched to supply the hydraulic oil to the second A port 323 or to block the supply of the hydraulic oil to the second P port 322.

The third flushing block 500 is provided to shut off the hydraulic fluid.

The hydraulic actuator primary to tertiary flushing is performed as follows in the flushing unit 10 as described above.

The primary flushing is the flushing of the ETS line E and when the hydraulic fluid is supplied to the first P port 122 of the first flushing block 120, the first switching part 140 is switched, And supplies the hydraulic fluid supplied to the port 122 to the port B124. The second switching unit of the second flushing block assembly 300 is not operated to supply the hydraulic fluid to the second P port 322. Then, hydraulic oil becomes ETS oil (F2), passes through ETS line (E), becomes FCD oil (F3), and flows to FCD line (FC).

The second flushing is a flushing of the FAS line F. When the hydraulic fluid is supplied to the second P port 322 of the second flushing block, the second switching unit 340 is excited and supplied to the second P port 322 And supplies the hydraulic oil to the second port 323. The first switching unit 140 of the first flushing block assembly 100 is not operated to supply hydraulic fluid to the first P port 122. Then, the hydraulic oil becomes the FAS oil F1, passes through the FAS line F, becomes the FCD oil F3, and flows into the FCD line FC.

The third flushing is internal flushing of the hydraulic actuator H so that when the hydraulic fluid is supplied to the first P port 122 of the first flushing block 120, the first switching part 140 is energized, And supplies it to the port 123. The second switching unit 340 of the second flushing block assembly 300 is energized to supply hydraulic oil to the second port 323 when the hydraulic fluid is supplied to the second port 322 of the second flushing block 320 . The hydraulic fluid is supplied into the cylinder CY of the hydraulic actuator H and the hydraulic fluid supplied in the second switching unit 340 is discharged to the FCD line FC through an oil supply pipe (not shown) The inside of the hydraulic actuator H is flushed.

The first pressure branching flow path 125 and the first temperature branching flow path 126 of the first flushing block assembly 100 are formed to measure the pressure and temperature of the hydraulic fluid supplied to the first flushing block 120 The second pressure branching flow path 325 and the second temperature branching flow path 326 of the second flushing block assembly 300 are formed to measure the pressure and temperature of the hydraulic fluid supplied to the second flushing block 320. The flushing unit 10 according to the first embodiment of the present invention is provided in a control type. That is, the second flushing block assembly 300 is attached to the position where the servo valve is attached, so that the first and second and third flushing of the hydraulic actuator H are performed.

7 is a plan view of a second flushing block assembly of a flushing unit of a hydraulic actuator for a power plant according to a second embodiment of the present invention.

The flushing unit 10 'of the hydraulic actuator H for a power plant according to the second embodiment of the present invention is similar to the flushing unit 10 of the hydraulic actuator H for a power plant according to the first embodiment of the present invention, 1 flushing block assembly 100, a second flushing block assembly 300 'and a third flushing block 500. Herein, the first flushing block assembly 100 and the third flushing block 300 of the flushing unit 10 'according to the second embodiment of the present invention are similar to those of the first flushing block assembly 100 and the third flushing block 300 of the first embodiment, Since the flushing block 500 is used in the same manner as the flushing block 500, detailed description thereof will be omitted.

The second flushing block assembly 300 'includes a second flushing block 320' and a second switching portion 340 '. The second flushing block 320 'includes a second body 321', a second P port 322 ', a second A port 323', a second pressure branch channel 325 ', and a second temperature branch channel 326' '). The second flushing block assembly 300 'of the second embodiment of the present invention performs the same operation as the second flushing block assembly 300 of the first embodiment of the present invention for primary to tertiary flushing. However, unlike the second flushing block assembly 300 of the first embodiment, the second flushing block assembly 300 'of the second embodiment of the present invention is not mounted at the position where the servo valve is mounted. That is, the flushing unit 10 'according to the second embodiment of the present invention is provided in a noncontrol type.

Therefore, according to the switching operation of the first switching unit of the first flushing block assembly and the second switching unit of the second flushing block assembly, it is possible to shorten the flushing process time of the hydraulic actuator by flushing the hydraulic oil passage and the hydraulic actuator inside of the hydraulic actuator , Minimizing power plant downtime and reducing cost.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, . Therefore, it should be understood that the above-described embodiments are illustrative in all aspects and not restrictive. The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present invention do.

100: first flushing block assembly 120: first flushing block
122: first P port 123: first A port
124: B port 125: first pressure branching flow path
126: first temperature branching flow path 140: first switching unit
300: second flushing block assembly 320: second flushing block
322: second P port 323: second A port
325: second pressure branching flow path 326: second temperature branching flow path
340: second switching unit

Claims (10)

1. A flushing unit of a hydraulic actuator for a power plant having an ETS (Emergency Trip Supply) line, a FAS (Fluid Actuating Supply) line and an FCD (Fluid Drain to Cooler) line,
A first flushing block attached to the hydraulic actuator and having a first P port provided with hydraulic fluid, a first A port and a B port provided with hydraulic fluid provided from the first P port, and a second flushing block mounted on the first flushing block, A first flushing block assembly having a first switching portion switched to either supply to either the 1A port or the B port or to block the supply of hydraulic fluid to the first P port;
A second flushing block attached to the hydraulic actuator and formed with a second P port provided with hydraulic oil and a second A port provided with hydraulic oil provided from the second P port and a second flushing block mounted to the second flushing block, A second flushing block assembly having a second switching portion that is switched to shut off supply or supply of hydraulic fluid to the second P port.
The method according to claim 1,
Wherein the flushing unit sequentially flushes the ETS line, the FAS line, and the hydraulic actuator inside the hydraulic actuator.
The method according to claim 1,
Flushing of the ETS line,
Wherein the first switching unit is switched to supply hydraulic fluid from the first P port to the B port and the second switching unit is switched to shut off hydraulic fluid supply to the second P port, .
The method of claim 3,
And the flushing of the ETS line is switched by the first switching unit to drain the hydraulic oil supplied from the first P port to the B port to the outside of the hydraulic actuator.
The method according to claim 1,
Flushing of the FAS line,
Wherein the first switching unit is switched to cut off hydraulic fluid supply to the first P port and the second switching unit is switched to supply hydraulic fluid from the second P port to the second A port. unit.
6. The method of claim 5,
Wherein the flushing of the FAS line is performed by supplying hydraulic oil supplied to the second A port by the switching of the second switching unit to the inside of the hydraulic actuator and draining to the outside.
6. The method of claim 5,
The flushing of the inside of the hydraulic actuator,
Wherein the first switching unit is switched to supply hydraulic fluid from the first P port to the first A port and the second switching unit is switched to shut off hydraulic fluid supply to the second P port. unit.
8. The method according to any one of claims 3, 5 and 7,
Wherein supply of hydraulic fluid to either one of the first port (A) and the port (B) and supply of hydraulic fluid to the second port are performed when the first switching unit and the second switching unit are energized, respectively, unit.
8. The method according to any one of claims 3, 5 and 7,
And the hydraulic oil shutoff to the first P port and the second P port is performed when the first switching unit and the second switching unit are energized.
The method according to claim 1,
The first flushing block and the second flushing block measure the pressure and temperature of the hydraulic fluid supplied to the first P port and the second A port, respectively, from the first P port and the second A port, Wherein a pressure branching flow path and a temperature branching flow path are formed on the upper surface of the housing.

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