WO2016076635A1

WO2016076635A1 - Test apparatus of air discharging valve used in hydraulic actuator for power plant, and test method therefor

Info

Publication number: WO2016076635A1
Application number: PCT/KR2015/012149
Authority: WO
Inventors: 양천규; 김수철
Original assignee: 주식회사 에네스지
Priority date: 2014-11-13
Filing date: 2015-11-12
Publication date: 2016-05-19
Also published as: PH12015502828A1; KR101539030B1

Abstract

A test apparatus of an air discharging valve used in a hydraulic actuator for a power plant according to the present invention comprises: a main body which receives hydraulic oil and discharges the received hydraulic oil; an air discharging valve which selectively discharges and blocks air and the hydraulic oil; a first test unit which has the air discharging valve disposed thereon, is disposed on a discharging line where the hydraulic oil received in the main body is discharged, and measures at least one of the pressure, which is applied to the air discharging valve by the hydraulic oil which flows into the discharging line according to the supply pressure of gas supplied into the main body at a constant pressure, and the discharging amount of the hydraulic oil discharged via the air discharging valve; and a second test unit which has the air discharging valve disposed thereon, is connected to the main body, and measures at least one of the pressure, which is applied to the air discharging valve by the hydraulic oil supplied into the main body, and the discharging amount of the hydraulic oil discharged via the air discharging valve.

Description

Test device for air discharge valve used in hydraulic actuator for power plant and test method thereof

The present invention relates to a test apparatus for an air discharge valve used in a hydraulic actuator for a power plant and a test method thereof, and more particularly, to a hydraulic actuator for a power plant for testing an air discharge valve before being actually used in a hydraulic actuator for a power plant. The present invention relates to a test apparatus for an air discharge valve and a test method thereof.

In general, steam turbines installed in thermal and nuclear power plants are composed of a high pressure turbine and a low pressure turbine. The steam flowing into the high pressure turbine and the low pressure turbine and the steam discharged through the turbine are controlled by the turbine governor control system equipment.

Here, the turbine governor control system equipment is generally composed of turbine valves for regulating the pressure and flow rate of steam and hydraulic actuators for power plants that provide driving power to the turbine valves. The hydraulic actuator for a power plant is composed of a piston for linear reciprocating motion and a cylinder for receiving and discharging the hydraulic oil according to the hydraulic pressure of the hydraulic oil supplied and recovered.

On the other hand, since the air inside the cylinder is compressed when the hydraulic oil is supplied to the cylinder of the hydraulic actuator for power plants, there was a problem that the seal (O-ring, etc.) may be broken according to the explosiveness of the compressed air. In order to solve the problems caused by the compression of the air remaining inside the cylinder when the hydraulic actuator for the power plant is operated, the applicant filed a patent on October 26, 2011, and filed on July 12, 2012. 1166689, “Turbine Valve Control Actuator with Built-in Check Valve, Nuclear and Thermal Power Plant”. Applicant's registered patent, “check valve built-in nuclear and thermal power plant turbine valve control actuator” has a check valve structure registered inside the piston to discharge a small amount of hydraulic oil together with air when operating the hydraulic actuator for power plants. The problem of compression and explosion has been solved.

However, since the check valve registered and applied by the present applicant can check the operating characteristics only when mounted on the piston of the hydraulic actuator for a power plant, there is an inconvenience in that it must be separated from the piston and remounted when the required operating characteristics are departed. .

An object of the present invention is a test apparatus for an air discharge valve used in a hydraulic actuator for a power plant that can test the operating characteristics of the air discharge valve in the operating environment of the hydraulic actuator for the power plant prior to mounting the hydraulic actuator for the power plant and a test method thereof. To provide.

According to the present invention, there is provided a means for solving the hydraulic oil, the main body for discharging the hydraulic oil accommodated and accommodated, the air discharge valve for selectively discharging and blocking the air and hydraulic oil, and the hydraulic oil disposed in the main body and the air discharge valve is disposed Is disposed in a discharge line for discharging and the pressure acting on the air discharge valve by the hydraulic oil flowing to the discharge line according to the supply pressure of the gas supplied at a predetermined pressure inside the main body and the hydraulic oil discharged through the air discharge valve The first test unit for measuring at least one of the flow rate of the air discharge valve is disposed and connected to the main body and the pressure acting on the air discharge valve by the hydraulic oil supplied to the main body and the air discharge valve The second test unit for measuring at least one of the flow rate of the hydraulic oil flowing through the It is made by the test apparatus of the air discharge valve used in the hydraulic actuator for power plant comprising.

Here, preferably, the pressure measured in the first test unit may be relatively lower than the pressure measured in the second test unit.

Further, more preferably, the first test unit tests the air discharge valve at the set pressure of the hydraulic actuator for the power plant, and the second test unit is operated at the operating pressure of the hydraulic actuator for the power plant based on the set pressure. Air vent valves can be tested.

The pressure applied to the air discharge valves measured in the first and second test units may include air pressure and hydraulic oil pressure.

The first test unit includes the first test block for receiving the air discharge valve and forming a flow path through which the hydraulic oil flowing from the main body to the discharge line is provided with the air discharge valve interposed therebetween, and the air discharge valve. It may be connected to the first pressure measuring unit for measuring the pressure of the air and hydraulic oil acting on the air discharge valve, and may include a first flow rate measuring unit for measuring the outflow amount of the hydraulic oil flowing through the air discharge valve.

The first test unit may further include a gas supply unit connected to the main body and supplying gas at a predetermined pressure set inside the main body such that hydraulic oil flows to the first test block.

The gas supplied from the gas supply part may include nitrogen gas.

Preferably, the first test block may be provided with an air retention part in which the air flowing to the air discharge valve together with the hydraulic oil stays.

The second test unit is disposed on an upper portion of the main body and accommodates at least one of the air discharge valve, the second test for forming a flow path for supplying and discharging the hydraulic oil supplied into the main body with the air discharge valve in between A second pressure measurement unit connected to the convex, the air discharge valve to measure the pressure of the air and hydraulic oil acting on the air discharge valve, and a second flow rate measurement to measure the flow rate of the hydraulic oil flowing out through the air discharge valve It may include wealth.

Here, the second test unit may measure at least one of the pressure generated by the hydraulic oil supplied to the inside of the main body from the outside with respect to the at least one air discharge valve accommodated in the second test block and at least one of the flow rate of the hydraulic oil. have.

The apparatus may further include a plurality of main body pressure measuring units disposed at predetermined intervals along a standing direction of the main body to measure the pressure inside the main body.

The air discharge valve forms a valve body having a discharge flow path for discharging air and hydraulic oil, and an orifice disposed in the valve body and communicating with the discharge flow path, and the discharge flow path and the orifice communicate and communicate with each other by hydraulic oil. It may include a valve spool reciprocating between the release position and the elastic member disposed in the valve body to provide an elastic force to the valve spool.

In addition, the air discharge valve has a plurality of relatively larger width than the gap between the valve body and the valve spool at a predetermined interval in any one of the valve body and the valve spool along the reciprocating direction of the valve spool. It may further include a throttling action portion for throttling the hydraulic oil flowing into the gap.

On the other hand, the means for solving the problem, the power plant having a main body, an air discharge valve for selectively discharging and blocking the air and hydraulic oil, each of the first test unit and the second test unit in which the air discharge valve is disposed A test apparatus for an air discharge valve used in a hydraulic actuator, comprising: (a) supplying hydraulic oil to the inside of the main body, and (b) the first test unit to a discharge line through which the hydraulic oil contained in the main body is discharged. Arranging and supplying gas into the main body at a pressure corresponding to the set pressure of the hydraulic actuator for the power plant; and (c) the hydraulic oil discharged to the discharge line according to the pressure of the gas supplied into the main body. 1 at least the pressure applied to the air discharge valve disposed in the test unit and the amount of hydraulic oil flowing out through the air discharge valve Power plant characterized in that it comprises the step of measuring one slow made by the test method of the test device of the air discharge valve used in the hydraulic actuator.

In addition, the test method of the test device for the air discharge valve used in the hydraulic actuator for the power plant is (d) connecting the second test unit to the main body and closing the discharge line, (e) inside the main body Supplying hydraulic oil, and (f) at least one of a pressure applied to the air discharge valve disposed in the second test unit by the hydraulic oil supplied inside the main body, and an outflow amount of the hydraulic oil discharged through the air discharge valve. It may further comprise the step of measuring one.

Here, in the step (c), the air discharge valve disposed in the first test unit may measure at least one of a pressure and an outflow amount of hydraulic oil according to a set pressure applied to the hydraulic actuator for the power plant.

On the other hand, the air discharge valve disposed in the second test unit in the step (f) may measure at least one of the pressure and the amount of hydraulic oil outflow according to the operating pressure applied to the hydraulic actuator for the power plant.

The pressure measured in the first test unit is preferably lower than the pressure measured in the second test unit.

The apparatus for testing an air discharge valve used in the hydraulic actuator for the power plant further includes a plurality of main body pressure measuring units arranged at regular intervals along a standing direction of the main body to measure the pressure inside the main body, The test method of the test apparatus of the air discharge valve used in the hydraulic actuator may further comprise the step of measuring the pressure inside the main body by using a plurality of the main body pressure measuring unit.

In the step (b), the gas supplied into the main body may include nitrogen gas.

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

Effects of the test device and the test method of the air discharge valve used in the hydraulic actuator for power plants according to the present invention are as follows.

First, before the air discharge valve is mounted on the hydraulic actuator for power plant, the first test unit and the second test unit can be used to test the operating characteristics of the air discharge valve in the actual operating environment of the hydraulic actuator for the power plant. Operational reliability of the valve can be secured.

Second, it is possible to reduce the time required for setting and adjusting the air discharge valve after installing the air discharge valve by testing the air discharge valve before installing the air discharge valve in the hydraulic actuator for the power plant, so that the response reliability and productivity of the hydraulic actuator for the power plant can be reduced. Can improve.

1 is a first operation cross-sectional view of a hydraulic actuator for a power plant,

2 is a second operation cross-sectional view of the hydraulic actuator for power plants,

3 is a first cross-sectional view of the air discharge valve shown in region 'A' of FIG.

4 is a second cross-sectional view of the air discharge valve shown in the area 'B' of FIG.

5 is an operation cross-sectional view of another embodiment of the air discharge valve shown in FIGS. 3 and 4;

6 is an enlarged cross-sectional view of the region 'C' shown in FIG. 5,

7 is a plan view of a test apparatus for an air discharge valve used in a hydraulic actuator for a power plant according to an embodiment of the present invention;

FIG. 8 is a cross-sectional view taken along the line 'VIII-VIII' shown in FIG. 7;

9 is a control block diagram of a test apparatus for an air discharge valve used in a hydraulic actuator for a power plant according to an embodiment of the present invention;

10 is an operation cross-sectional view of a first test unit of a test apparatus of an air discharge valve used in a hydraulic actuator for a power plant according to an embodiment of the present invention;

FIG. 11 is an enlarged cross-sectional view of the region 'D' shown in FIG. 10;

12 is an operation cross-sectional view of a second test unit according to an embodiment of the present invention;

FIG. 13 is a partial cross-sectional view of the line 'XIII-XIII' shown in FIG. 7;

14 is a flowchart illustrating a first test method of a test apparatus for an air discharge valve used in a hydraulic actuator for a power plant according to an embodiment of the present invention;

15 is a flowchart illustrating a second test method of a test apparatus for an air discharge valve used in a hydraulic actuator for a power plant according to an embodiment of the present invention;

16 is a flowchart illustrating a third test method of a test apparatus for an air discharge valve used in a hydraulic actuator for a power plant according to an embodiment of the present invention.

1 is a first operating cross-sectional view of a hydraulic actuator for a power plant, FIG. 2 is a second operating cross-sectional view of a hydraulic actuator for a power plant, FIG. 3 is a first operating cross-sectional view of an air discharge valve shown in region 'A' of FIG. 1, and FIG. 4 is a second operation cross-sectional view of the air discharge valve shown in the 'B' region of FIG.

1 to 4, the hydraulic actuator 1 for a power plant includes a cylinder 10, a piston 30, and an air discharge valve 110. Here, the air discharge valve 110 is disposed in the piston 30 to selectively discharge and block the air and the hydraulic oil (F). In detail, when the hydraulic oil F is supplied to the cylinder 10 of the hydraulic actuator 1 for a power plant shown in FIG. 1, the piston 30 is connected to the hydraulic oil F as shown in the hydraulic actuator 1 for the power plant shown in FIG. 2. Rise by). The operation of the air discharge valve 110 related to the operation of the hydraulic actuator 1 for the power plant is shown in more detail in FIGS. 3 and 4.

FIG. 5 is a cross-sectional view illustrating another embodiment of the air discharge valve illustrated in FIGS. 3 and 4, and FIG. 6 is an enlarged cross-sectional view of a region 'C' shown in FIG. 5.

As shown in Figures 5 and 6, the air discharge valve 110 has a different configuration and features than the air discharge valve 110 shown in Figs. The air discharge valve 110 shown in FIGS. 3 to 6 is used in the test apparatus 100 of the air discharge valve 110 used in the hydraulic actuator 1 for power plants according to the embodiment of the present invention. The test apparatus 100 of the air discharge valve 110 used for the hydraulic actuator 1 for power plants will be described in detail.

Hereinafter, a test apparatus 100 of an air discharge valve 110 used in a hydraulic actuator 1 for a power plant according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Prior to the description, the test apparatus 100 of the air discharge valve 110 used in the hydraulic actuator 1 for power plants according to the embodiment of the present invention has two air discharge valves 110 shown in FIGS. It is noted in advance that at least one of) may be used. In addition, the reference numerals for the configuration of the air discharge valve 110 to be described below are previously described with the same reference numerals specified in FIGS. In addition, the detailed description of the air discharge valve 110 will be described with reference to the drawings shown in FIGS.

7 is a plan view of a test apparatus for an air discharge valve used in a hydraulic actuator for a power plant according to an embodiment of the present invention, FIG. 8 is a sectional view of the line 'VIII-VIII' shown in FIG. 7, and FIG. 9 is an embodiment of the present invention. The control block diagram of the test apparatus of the air discharge valve used for the hydraulic actuator for power plants according to the example.

As illustrated in FIGS. 7 to 9, the test apparatus 100 (hereinafter, referred to as a test apparatus) of the air discharge valve 110 used in the hydraulic actuator 1 for a power plant according to the embodiment of the present invention is It includes an air discharge valve 110, the main body 120, the first test unit 140 and the second test unit 160. In addition, the test apparatus 100 according to an embodiment of the present invention further includes a main body, an air discharge valve 110, a measurement unit 170, a controller 180, and a display 190.

The air discharge valve 110 selectively discharges and blocks air and hydraulic oil (F). The air discharge valve 110 is provided with two configurations and features, as shown in Figures 3 to 6 described above. The air discharge valve 110 is substantially mounted to the hydraulic actuator 1 for the power plant, and is disposed in the test apparatus 100 of the present invention to operate the first test unit 140 and the second test unit 160. Tested accordingly.

3 and 4, the air discharge valve 110 includes a valve body 112, a valve spool 114, and an elastic member 116. The valve body 112 forms a discharge passage 112a for discharging air and hydraulic oil (F). The valve spool 114 and the elastic member 116 are accommodated in the valve body 112. The valve spool 114 is selectively operated according to the pressure state of the hydraulic oil (F). In detail, the valve spool 114 is moved up and down in accordance with the pressure state of the hydraulic oil (F). A spool body 114a accommodated in the valve body 112, an inflow passage 114b through which air and hydraulic oil F are introduced, and an orifice 114c in communication with the discharge passage 112a. The elastic member 116 is disposed inside the valve body 112 to provide elastic force to the valve spool 114. The elastic member 116 provides an elastic force to the valve spool 114 to lower the elevated valve spool 114.

The valve spool 114 is located on the communication position where the discharge passage 112a and the orifice 114c communicate with each other to discharge the hydraulic oil F supplied as shown in FIG. 3. When the valve spool 114 is located in the communication position in this way, the air mixed with the hydraulic oil F or the air that has stayed is discharged through the air discharge valve 110 together with the hydraulic oil F. As the valve spool 114 discharges air and a small amount of hydraulic oil F in a communication position, a seal (O-ring, etc.) according to the compression of air when the air discharge valve 11 is mounted on the hydraulic actuator 1 for a power plant ) Can be prevented.

As shown in FIG. 4, the valve spool 114 is configured to supply air and a small amount of hydraulic oil F through the air discharge valve 110 according to the continuous supply of the hydraulic oil F when the hydraulic oil F is at a low pressure. When discharged, the valve spool 114 is positioned on a blocking position for raising by the fluid pressure of the hydraulic oil F to block the orifice 114c and the discharge passage 112a.

In addition, the air discharge valve 110 shown in FIG. 5 and FIG. 6 includes a valve body 112, a valve spool 114, an elastic member, and an throttling action portion 870. The valve body 112, the valve spool 114, and the elastic member 116 of the air discharge valve 110 shown in FIGS. 5 and 6 are merely different from each other, and are substantially shown in FIGS. 3 and 4. Since the operation process is the same as the air discharge valve 110, a detailed description thereof will be omitted.

The throttling action portion 118 is provided with a gap between the valve body 112 and the valve spool 114 at a predetermined distance along either of the valve body 112 and the valve spool 114 along the moving direction of the valve spool 114. It has a relatively larger width than (G) and is formed in plural, and throttles the hydraulic oil F which flows into the clearance G. The throttling action 118 throttles the hydraulic oil F flowing into the gap G when the valve spool 114 is located in the communication position. In detail, since the throttle action portion 118 is relatively larger than the flow area of the gap G, a pressure drop occurs in the hydraulic oil F flowing from the gap G to the throttle action portion 118. Air is continuously discharged by the throttling action in the throttling action portion 118 because the air is smaller than the particles of the hydraulic oil F and is fast.

The plurality of throttling action portions 118 sequentially drop the pressure along the flow direction of the hydraulic oil F flowing into the gap G, and guide the air and the hydraulic oil F to the discharge passage 112a. On the other hand, the throttle action portion 118 of the present invention provides the same pressure to the inner surface of the valve body 112 and the outer surface of the valve spool 114 disposed with a gap (G) between the valve spool 114 To stop the eccentric movement of.

In addition, the throttle action portion 118 accommodates the foreign matter contained in the hydraulic oil (F) flowing through the gap (G). That is, the foreign matter flowing into the throttling action part 118 does not flow into the gap G again and is accommodated in the throttling action part 118. Then, since foreign matters can be prevented from flowing between the valve body 112 and the valve spool 114, a decrease in lubricating force can be prevented between the valve body 112 and the valve spool 114.

Next, the main body 120 receives the hydraulic oil F and discharges the hydraulic oil F received therein. The main body 120 discharges the hydraulic oil F or supplies the hydraulic oil F to the second test unit 160 so that the received hydraulic oil F flows to the first test unit 140. The main body 120 includes a housing 122, a supply pipe 124, a discharge pipe 126, and a gas supply pipe 124.

The housing 122 is provided in a cylindrical shape to accommodate the hydraulic oil F. The supply pipe 124 interconnects the housing 122 and the hydraulic oil supply unit (not shown) and supplies the hydraulic oil F provided from the hydraulic oil supply unit to the housing 122. The discharge pipe 126 is disposed between the housing 122 and the first test unit 140 to form a discharge line of the hydraulic oil F discharged from the housing 122. The gas supply pipe 124 interconnects the housing 122 and the gas supply unit 148 to be described later to guide the gas provided from the gas supply unit 148 to the housing 122 when the first test unit 140 is operated.

FIG. 10 is an operation cross-sectional view of a first test unit of a test apparatus of an air discharge valve used in a hydraulic actuator for a power plant according to an embodiment of the present invention, and FIG. 11 is an enlarged cross-sectional view of a region 'D' shown in FIG. 10. .

10 and 11, the first test unit 140 is disposed in the discharge line for receiving the air discharge valve 110 and the hydraulic oil (F) accommodated in the main body 120 is discharged. The first test unit 140 is a pressure and an air discharge valve acting on the air discharge valve 110 by the hydraulic oil (F) flowing to the discharge line in accordance with the supply pressure of the gas supplied at a predetermined pressure inside the main body 120 At least one of the outflow amount of the hydraulic oil (F) flowing through the 110 is measured. Substantially, the first test unit 140 creates the same environment as the low pressure hydraulic oil F is supplied from the hydraulic actuator 1 for the power plant shown in FIG. 1 to test the air discharge valve 110. In one embodiment of the present invention, the first test unit 140 includes a first test block 142, a first pressure measuring unit 144, a first flow measuring unit 146, and a gas supply unit 148. .

The first test block 142 accommodates the air discharge valve 110, and includes a first block body 142a having a flow path formed therebetween with the air discharge valve 110 interposed therebetween, and an air retention part 142b in which air stays. do. Here, the air reservoir 142b forms a space in which the air flowing to the air discharge valve 110 together with the hydraulic oil F stays. In detail, the air reservoir 142b forms a residence space of the air flowing together with the hydraulic oil F in consideration of the amount of air staying inside the cylinder 10 to create a substantially same environment as the hydraulic actuator 1 for the power plant. do. In this way, the air reservoir 142b is provided to compensate for the amount of air acting on or discharged from the air discharge valve 110 in the low pressure state of the hydraulic actuator 1 for the power plant.

The first pressure measuring unit 144 is connected to the air discharge valve 110 to measure the pressure acting on the air discharge valve 110. The pressure measured by the first pressure measuring unit 144 includes a pressure of air and a pressure of hydraulic oil (F). Of course, the second pressure measuring unit 164 to be described later also measures the pressure of the air and the pressure of the hydraulic oil (F) in the same manner as the first pressure measuring unit 144. In addition, the first flow rate measuring unit 146 measures the outflow amount of the hydraulic oil F flowing out through the air discharge valve 110.

The gas supply unit 148 supplies a gas having a predetermined pressure inside the main body 120 such that the hydraulic oil F flows to the first test block 142. The gas supply unit 148 supplies a gas such that substantially the same set pressure as the hydraulic actuator 1 for the power plant is applied to the first test unit 140. For example, when the set pressure of the hydraulic actuator 1 for the power plant is 10 bar, the gas supply unit 148 is the body 120 so that the pressure of the hydraulic oil F corresponding to 10 bar to the first test unit 140 can be applied. ) Supply 10 bar of gas inside. Thus, the 10 bar gas supplied from the gas supply unit 148 provides a pressure of 10 bar to the hydraulic oil F accommodated in the main body 120, so that the hydraulic oil F is connected to the first test unit along the discharge line at a pressure of 10 bar. 140). Then, the first pressure measuring unit 144 and the first flow measuring unit 146 connected to the air discharge valve 110 of the first test unit 140 measure the pressure and the flow rate, respectively. The gas supplied from the gas supply unit 148 includes nitrogen gas as an embodiment of the present invention.

The test procedure for the air discharge valve 110 of the first test unit 140 described above closes the supply line of the supply pipe 124 and discharges the gas from the discharge line of the discharge pipe 126 and the gas supply pipe 124. This is done by opening the supply line.

Next, FIG. 12 is an operation cross-sectional view of a second test unit according to an exemplary embodiment of the present invention, and FIG. 13 is a partial cross-sectional view of the line 'XIII-XIII' shown in FIG. 7.

As shown in FIGS. 12 and 13, the second test unit 160 receives the air discharge valve 110 and is connected to the main body 120. The second test unit 160 is a pressure applied to the air discharge valve 110 by the hydraulic oil (F) supplied into the main body 120 and the amount of the hydraulic oil (F) flowing out through the air discharge valve 110 Measure at least one. The second test unit 160 is tested at the set pressure after the test is completed at the set pressure in the first test unit 140. In detail, the first test unit 140 is to test the air discharge valve 110 at the set pressure of the hydraulic actuator 1 for the power plant, and the second test unit 160 is the hydraulic actuator 1 for the power plant. To test the air discharge valve 110 at the operating pressure of. In one embodiment of the present invention, the second test unit 160 includes a second test block 162, a second pressure measuring unit 164, and a second flow rate measuring unit 166.

The second test block 162 is disposed above the main body 120 and accommodates at least one air discharge valve 110, and the hydraulic oil supplied into the main body 120 with the air discharge valve 110 interposed therebetween. F) forms a flow path through which it is supplied and discharged. Here, the hydraulic oil F discharged through the flow path of the second test block 162 is a small amount of hydraulic oil F discharged through the air discharge valve 110. The second test block 162 includes a second block body 162a and a communication unit 162b. The communication unit 162b guides the hydraulic oil F supplied from the main body 120 to the air discharge valve 110. Here, the communication portion 162b has a hydraulic oil (F) in accordance with the increase in the level of the hydraulic oil (F) supplied into the main body 120 in the open state of the supply pipe 124, the discharge pipe and the gas supply pipe 124 closed state. Is supplied. Of course, the communication unit 162b may have air stay similar to the air retention unit 142b of the first test unit 140.

The second pressure measuring unit 164 and the second flow measuring unit 166 measure the pressure applied to the air discharge valve 110 and the amount of the hydraulic oil F flowing out through the air discharge valve 110, respectively.

On the other hand, when comparing the first test unit 140 and the second test unit 160, the pressure measured in the first test unit 140 is a relatively low pressure than the pressure measured in the second test unit 160. That is, the first test unit 140 tests the air discharge valve 110 at the set pressure of the hydraulic actuator 1 for the power plant, and the second test unit 160 is the hydraulic actuator 1 for the power plant based on the set pressure. Test the air discharge valve 110 at the operating pressure of). Thus, the first test unit 140 and the second test unit 160 has an advantage of measuring the operation of the air discharge valve 110 with respect to the set pressure and the operating pressure of the hydraulic actuator for the power plant.

The main body pressure measuring unit 170 is disposed in plural at regular intervals along the standing direction of the main body 120 to measure the pressure inside the main body 120. The main body pressure measuring unit 170 is disposed to perform a feedback role such as whether the pressure of the gas supplied into the main body 120 is equal to the set pressure during the operation of the first test unit 140.

The controller 180 detects from the first pressure measuring unit 144, the first flow measuring unit 146, the second pressure measuring unit 164, the second flow measuring unit 166, and the main body pressure measuring unit 170. Operation of the display unit to receive the received signal and display the measured data. The controller 180 and the display 190 may be replaced with a computer device.

Next, FIG. 14 is a flowchart illustrating a first test method of a test apparatus for an air discharge valve used in a hydraulic actuator for a power plant according to an embodiment of the present invention, and FIG. 15 is air used for a hydraulic actuator for a power plant according to an embodiment of the present invention. Second test method flow chart of the test device of the discharge valve, and Figure 16 is a third test method flow chart of the test device of the air discharge valve used in the hydraulic actuator for power plants according to an embodiment of the present invention.

As shown in FIG. 14, a first test method of a test apparatus 100 of an air discharge valve 110 used in a hydraulic actuator 1 for a power plant according to an embodiment of the present invention is as follows.

First, the hydraulic oil F is supplied into the main body 120 (S10). In step S10, the hydraulic oil F supplied into the main body 120 is discharged to the discharge line for the test from the first test unit 140. The first test unit 140 in which the air discharge valve 110 is disposed in the discharge line is disposed (S30). The gas is supplied into the main body 120 at a pressure corresponding to the set pressure of the hydraulic actuator 1 for the power plant (S50). Here, nitrogen gas is used as the gas supplied in step S50. When gas is supplied into the main body 120 in step S50, the hydraulic oil F inside the main body 120 is discharged to the discharge line according to the pressure of the gas. When the hydraulic oil F is discharged to the discharge line, at least one of the pressure applied to the air discharge valve 110 disposed in the first test unit 140 and the flow rate of the hydraulic oil F is measured (S70).

As shown in FIG. 15, a second test method of the test apparatus 100 of the air discharge valve 110 used in the hydraulic actuator 1 for a power plant according to the embodiment of the present invention is as follows.

In the second test method illustrated in FIG. 15, the hydraulic oil F is supplied into the main body 120 like the first test method (S100). In operation S100, the hydraulic oil F supplied into the main body 120 is discharged to the discharge line for the test from the first test unit 140. The first test unit 140 in which the air discharge valve 110 is disposed in the discharge line is disposed (S110). The gas is supplied to the body 120 at a pressure corresponding to the set pressure of the hydraulic actuator 1 for the power plant (S120). When the hydraulic oil F is discharged to the discharge line, at least one of the pressure applied to the air discharge valve 110 disposed in the first test unit 140 and the flow rate of the hydraulic oil F is measured (S130).

After the measurement data according to the set pressure applied to the hydraulic actuator 1 for the power plant is calculated by the first test unit 140, the second test unit 160 is connected to the main body 120 and the discharge line is connected. It is closed (S140). The hydraulic oil F is supplied into the main body 120 (S150). When the hydraulic oil F is supplied into the main body 120, at least one of a pressure applied to the air discharge valve 110 disposed in the second test unit 160 by the hydraulic oil F and an outflow amount of the hydraulic oil F It is measured (S160).

As shown in FIG. 15, a third test method of the test apparatus 100 of the air discharge valve 110 used in the hydraulic actuator 1 for a power plant according to the embodiment of the present invention is as follows.

The third test method illustrated in FIG. 15 includes first and second test methods. First, the hydraulic oil F is supplied into the main body 120 (S300). In operation S300, the hydraulic oil F supplied into the main body 120 is discharged to the discharge line for the test from the first test unit 140. The first test unit 140 in which the air discharge valve 110 is disposed in the discharge line is disposed (S310). The gas is supplied into the main body 120 at a pressure corresponding to the set pressure of the hydraulic actuator 1 for the power plant (S320). When the hydraulic oil (F) is discharged to the discharge line at least one of the pressure applied to the air discharge valve 110 disposed in the first test unit 140 and the amount of outflow of the hydraulic oil (F) is measured (S330).

After the measurement data according to the set pressure applied to the hydraulic actuator 1 for the power plant is calculated by the first test unit 140, the second test unit 160 is connected to the main body 120 and the discharge line is connected. It is closed (S340). The hydraulic oil F is supplied into the main body 120 (S350). When the hydraulic oil F is supplied into the main body 120, at least one of a pressure applied to the air discharge valve 110 disposed in the second test unit 160 by the hydraulic oil F and an outflow amount of the hydraulic oil F Measured (S360).

In addition, after the measurement data is calculated from the first test unit 140 and the second test unit 160, the pressure in the main body 120 is measured (S370).

Therefore, before the air discharge valve is installed in the hydraulic actuator for the power plant, the first test unit and the second test unit can be used to test the operating characteristics of the air discharge valve in the actual operating environment of the hydraulic actuator for the power plant. Operational reliability of the valve can be secured.

In addition, it is possible to reduce the time required for setting and adjusting the air discharge valve after installing the air discharge valve by testing the air discharge valve before installing the air discharge valve in the hydraulic actuator for the power plant, thereby improving the productivity of the hydraulic actuator for the power plant. Can be.

Although the embodiments of the present invention have been described above with reference to the accompanying drawings, those skilled in the art to which the present invention pertains may be embodied in other specific forms without changing the technical spirit or essential features of the present invention. It will be understood that. Therefore, it should be understood that the embodiments described above are exemplary in all respects and not restrictive. The scope of the present invention is shown by the following claims rather than the detailed description, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included in the scope of the present invention. do.

Claims

A main body accommodating the hydraulic oil and discharging the received hydraulic oil;

An air discharge valve for selectively discharging and blocking air and hydraulic oil;

The air discharge valve is disposed and disposed in the discharge line for discharging the hydraulic oil contained in the main body, and the hydraulic discharged to the air discharge valve by the hydraulic oil flowing to the discharge line in accordance with the supply pressure of the gas supplied at a predetermined pressure inside the main body A first test unit which measures at least one of an applied pressure and an outflow amount of hydraulic oil flowing out through the air discharge valve;

The air discharging valve is disposed and connected to the main body, and measuring at least one of the flow rate of the hydraulic oil flowing through the air discharge valve and the pressure acting on the air discharge valve by the hydraulic oil supplied inside the main body Test apparatus for the air discharge valve used in the hydraulic actuator for power plants, characterized in that it comprises a test unit.
The method of claim 1,

The pressure measured in the first test unit is a relatively low pressure than the pressure measured in the second test unit test device of the air discharge valve used for the hydraulic actuator for power plant.
The method of claim 2,

The first test unit tests the air discharge valve at a set pressure of the hydraulic actuator for the power plant,

The second test unit is a test device for an air discharge valve used in a hydraulic actuator for a power plant, characterized in that for testing the air discharge valve at the operating pressure of the hydraulic actuator for the power plant based on the set pressure.
The method according to any one of claims 1 to 3,

The pressure applied to the air discharge valve measured in the first and second test unit is a test device of the air discharge valve used in the hydraulic actuator for power plants, characterized in that the pressure of the air and the hydraulic oil.
The method of claim 1,

The first test unit,

A first test block accommodating the air discharge valve and defining a flow path through which the hydraulic oil flowing from the main body to the discharge line is provided with the air discharge valve interposed therebetween;

A first pressure measurement unit connected to the air discharge valve and measuring pressure of air and hydraulic oil acting on the air discharge valve;

And a first flow rate measuring unit for measuring the flow rate of the hydraulic oil flowing out through the air discharge valve.
The method of claim 5,

The first test unit further includes a gas supply unit connected to the main body and supplying a gas at a predetermined pressure set inside the main body such that the hydraulic oil flows to the first test block. Test device for air exhaust valves used.
The method of claim 6,

The gas supplied from the gas supply unit is a test device for an air discharge valve used in the hydraulic actuator for power plants, characterized in that the nitrogen gas.
The method according to any one of claims 5 to 7,

The first test block is a test device for an air discharge valve used in a hydraulic actuator for a power plant, characterized in that the air retention portion is formed in the air flows to the air discharge valve with the hydraulic oil is formed.
The method of claim 1,

The second test unit,

A second test convex disposed on an upper portion of the main body and accommodating at least one air discharge valve and forming a flow path through which the hydraulic oil supplied and discharged through the air discharge valve is interposed;

A second pressure measurement unit connected to the air discharge valve and measuring pressure of air and hydraulic oil acting on the air discharge valve;

And a second flow rate measuring unit for measuring an outflow amount of the hydraulic oil flowing out through the air discharge valve.
The method of claim 9,

The second test unit,

At least one of the pressure generated by the hydraulic oil supplied from the outside to the inside of the main body for the at least one air discharge valve accommodated in the second test block and at least one of the flow rate of the hydraulic oil to the power plant hydraulic actuator Test device for air exhaust valves used.
The method of claim 1,

The apparatus of claim 1, further comprising a plurality of main body pressure measuring units arranged at regular intervals along a standing direction of the main body to measure the pressure inside the main body.
The method of claim 1,

The air discharge valve,

A valve body having a discharge passage configured to discharge air and hydraulic oil;

A valve spool disposed in the valve body and forming an orifice in communication with the discharge flow path, the valve spool reciprocating between the discharge flow path and a position where the orifice communicates and is released from communication by hydraulic oil;

It is disposed inside the valve body, the test device of the air discharge valve used in the hydraulic actuator for power plant, characterized in that it comprises an elastic member for providing an elastic force to the valve spool.
The method of claim 12,

The air discharge valve,

A plurality of valves having a relatively larger width than a gap between the valve body and the valve spool at a predetermined interval along one of the valve body and the valve spool along the reciprocating direction of the valve spool, and flow into the gap An apparatus for testing an air discharge valve used in a hydraulic actuator for a power plant, characterized in that it further comprises a throttling action portion for throttling the hydraulic oil to be used.
A main body, an air discharge valve for selectively discharging and blocking air and hydraulic oil, and a test device for an air discharge valve used in a hydraulic actuator for a power plant having a first test unit and a second test unit each having the air discharge valve disposed thereon; and,

(a) supplying hydraulic oil into the main body;

(b) arranging the first test unit in a discharge line through which the hydraulic oil contained in the main body is discharged, and supplying gas into the main body at a pressure corresponding to a set pressure of the hydraulic actuator for the power plant;

(c) the pressure acting on the air discharge valve disposed in the first test unit by the hydraulic oil discharged to the discharge line according to the pressure of the gas supplied into the main body and the hydraulic oil discharged through the air discharge valve; A test method for a test apparatus for an air discharge valve used in a hydraulic actuator for a power plant, characterized by measuring at least one of the flow rate.
The method of claim 14,

Test method of the test device of the air discharge valve used in the hydraulic actuator for power plants,

(d) connecting the second test unit to the main body and closing the discharge line;

(e) supplying hydraulic oil into the main body;

(f) measuring at least one of a pressure applied to the air discharge valve disposed in the second test unit by the hydraulic oil supplied inside the main body and an amount of the hydraulic oil flowing out through the air discharge valve; The test method of the test apparatus of the air discharge valve used in the hydraulic actuator for power plants comprising a.
The method of claim 15,

The air discharge valve disposed in the first test unit in the step (c) is at least one of the pressure according to the set pressure applied to the hydraulic actuator for the power plant and the flow rate of the hydraulic oil characterized in that at least one Test method of the test device for the air discharge valve used in the actuator.
The method of claim 15,

The air discharge valve disposed in the second test unit in the step (f) is characterized in that for measuring at least one of the pressure of the operating pressure applied to the hydraulic actuator for the power plant and the flow rate of the hydraulic oil. Test method of the test device for the air discharge valve used in the actuator.
The method according to claim 16 or 17,

The pressure acting on the air discharge valve measured in the first and second test units test method of the test device of the air discharge valve used in the hydraulic actuator for power plants, characterized in that the pressure of the air and the hydraulic oil. .
The method of claim 18,

The pressure measured in the first test unit is a relatively low pressure than the pressure measured in the second test unit test method of the test device of the air discharge valve used hydraulic actuator for power plant.
The method of claim 18,

The apparatus for testing an air discharge valve used in the hydraulic actuator for the power plant further includes a plurality of main body pressure measuring units arranged at regular intervals along a standing direction of the main body to measure the pressure inside the main body,

Test method of the test device of the air discharge valve used in the hydraulic actuator for power plants,

(g) using a plurality of the main body pressure measuring unit, measuring the pressure inside the main body further comprises a test method for a test device for an air discharge valve used in the hydraulic actuator for power plants.
The method of claim 14,

The gas supplied to the inside of the main body in the step (b) comprises a nitrogen gas test method of the test device of the air discharge valve used in the hydraulic actuator for power plants.