KR101885162B1 - Pressure relief valve and apparatus for monitoring valve - Google Patents

Pressure relief valve and apparatus for monitoring valve Download PDF

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Publication number
KR101885162B1
KR101885162B1 KR1020150167227A KR20150167227A KR101885162B1 KR 101885162 B1 KR101885162 B1 KR 101885162B1 KR 1020150167227 A KR1020150167227 A KR 1020150167227A KR 20150167227 A KR20150167227 A KR 20150167227A KR 101885162 B1 KR101885162 B1 KR 101885162B1
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KR
South Korea
Prior art keywords
valve
pressure
signal
unit
opening
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KR1020150167227A
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Korean (ko)
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KR20170061975A (en
Inventor
홍진일
지창열
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삼성중공업(주)
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Priority to KR1020150167227A priority Critical patent/KR101885162B1/en
Publication of KR20170061975A publication Critical patent/KR20170061975A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
    • F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
    • F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
    • F16K17/0413—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded in the form of closure plates
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
    • F16K37/0025—Electrical or magnetic means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
    • F16K37/0025—Electrical or magnetic means
    • F16K37/0041—Electrical or magnetic means for measuring valve parameters
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
    • G01V3/02—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with propagation of electric current

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Remote Sensing (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Geophysics (AREA)
  • Fluid Mechanics (AREA)
  • Indication Of The Valve Opening Or Closing Status (AREA)
  • Safety Valves (AREA)

Abstract

The present invention relates to a pressure relief valve and a valve monitoring apparatus. The pressure relief valve according to an embodiment of the present invention includes: an opening / closing unit for opening / closing a fluid discharge path for discharging the fluid by interacting with the fluid; A sensing unit sensing at least one of opening and closing of the fluid discharge path by the opening / closing unit; An operating portion that acts to force the opening / closing portion to close the fluid discharge path; And a measuring unit for measuring a force acting on the opening / closing unit by the operating unit.

Description

[0001] PRESSURE RELIEF VALVE AND APPARATUS FOR MONITORING VALVE [0002]

The present invention relates to a pressure relief valve and a valve monitoring apparatus.

The pressure relief valve is a valve that opens when the fluid pressure exceeds a certain level, thereby lowering the pressure by releasing the fluid. The pressure relief valve is used to prevent safety accidents due to excessive pressure, which is installed in equipment handling fluids such as boilers, pressure vessels and piping.

As the pressure relief valve is used for a long time, the operating pressure that is involved in the opening and closing of the valve is changed, so that the valve can be opened at a pressure different from the initially set pressure. For example, a spring-type valve driven by a spring can set the operating pressure of the valve to regulate the length of the spring to discharge the fluid, but over time, the spring loses its elasticity, The valve can be opened at pressure.

Therefore, the pressure relief valve should be periodically inspected and calibrated so that it can always be opened at a constant pressure. However, existing valves are subjected to inspection and calibration after separating valves from the equipment for calibration, and then installing the valves again. In this process, the operation of the equipment must be stopped in order to separate the valves. .

It is an object of the present invention to provide a pressure relief valve and a valve monitoring apparatus capable of performing calibrating without separating a valve from a facility.

It is an object of the present invention to provide a pressure relief valve and a valve monitoring apparatus capable of appropriately acquiring a required pressure for opening a valve to reliably perform calibration.

The pressure relief valve according to an embodiment of the present invention includes: an opening / closing unit for opening / closing a fluid discharge path for discharging the fluid by interacting with the fluid; A sensing unit sensing at least one of opening and closing of the fluid discharge path by the opening / closing unit; An operating portion that acts to force the opening / closing portion to close the fluid discharge path; And a measuring unit for measuring a force acting on the opening / closing unit by the operating unit.

The opening and closing part may transition to an open state where the fluid discharge path is opened by the fluid when the pressure of the fluid exceeds a predetermined threshold pressure.

The sensing unit may include a contact sensor for sensing whether the opening / closing unit is in contact with the fluid discharge path.

The sensing unit may include: a flow sensor for sensing the flow of the fluid through the fluid discharge path.

The operating portion may include: a spring that applies an elastic force to the opening / closing portion.

The measuring unit may include: a load sensor for measuring a load by the operating unit.

A valve monitoring apparatus according to an embodiment of the present invention includes a first signal indicating whether the valve is opened or closed from a valve for regulating the pressure of the fluid below a critical pressure and a second signal indicating an operating pressure for closing the valve An input unit for receiving an input; A controller for processing the first signal and the second signal to monitor the operating pressure; And an output unit outputting a monitoring result of the operating pressure.

The control unit may detect a timing at which the valve transits from the closed state to the open state based on the first signal and acquire the operating pressure based on the second signal inputted before the detected timing .

Wherein the control unit is configured to: detect a timing at which the valve transitions from the open state to the closed state based on the first signal and to obtain the operating pressure based on the detected timing or the second signal input thereafter have.

The control unit may calculate a difference between the obtained operating pressure and a predetermined threshold pressure, and determine that the valve malfunctions if the difference exceeds a predetermined allowable value.

According to the embodiment of the present invention, it is possible to perform the calibrating process easily without separating the valve from the equipment, thereby reducing the process loss due to calibration.

According to an embodiment of the present invention, it is possible to reliably perform the calibration by suitably acquiring the pressure required to open the valve.

1 is a schematic structural view of a pressure relief valve according to an embodiment of the present invention.
FIG. 2 is a schematic view showing a state in which a pressure relief valve is opened according to an embodiment of the present invention. FIG.
3 is a schematic structural view of a pressure relief valve according to another embodiment of the present invention.
4 is a schematic diagram of a valve system including a valve monitoring device in accordance with an embodiment of the present invention.
5 is a diagram illustrating waveforms of first and second signals input to a valve monitoring apparatus according to an exemplary embodiment of the present invention.
6 is an exemplary flow diagram of a valve monitoring method in accordance with an embodiment of the present invention.
7 is an exemplary flow chart illustrating the process of processing the first and second signals to monitor the operating pressure in accordance with one embodiment of the present invention.
Figure 8 is an exemplary flow chart illustrating the process of processing the first and second signals to monitor the operating pressure in accordance with another embodiment of the present invention.

Other advantages and features of the present invention and methods of achieving them will become apparent with reference to the embodiments described below in detail with reference to the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the invention to those skilled in the art. Is provided to fully convey the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims.

Unless defined otherwise, all terms (including technical or scientific terms) used herein have the same meaning as commonly accepted by the generic art in the prior art to which this invention belongs. Terms defined by generic dictionaries may be interpreted to have the same meaning as in the related art and / or in the text of this application, and may be conceptualized or overly formalized, even if not expressly defined herein I will not.

The terminology used herein is for the purpose of illustrating embodiments and is not intended to be limiting of the present invention. In the present specification, the singular form includes plural forms unless otherwise specified in the specification. As used herein, the terms' comprise 'and / or various forms of use of the verb include, for example,' including, '' including, '' including, '' including, Steps, operations, and / or elements do not preclude the presence or addition of one or more other compositions, components, components, steps, operations, and / or components. The term 'and / or' as used herein refers to each of the listed configurations or various combinations thereof.

It should be noted that the terms such as '~', '~ period', '~ block', 'module', etc. used in the entire specification may mean a unit for processing at least one function or operation. For example, a hardware component, such as a software, FPGA, or ASIC. However, '~ part', '~ period', '~ block', '~ module' are not meant to be limited to software or hardware. Modules may be configured to be addressable storage media and may be configured to play one or more processors. ≪ RTI ID = 0.0 >

Thus, by way of example, the terms 'to', 'to', 'to block', 'to module' refer to components such as software components, object oriented software components, class components and task components Microcode, circuitry, data, databases, data structures, tables, arrays, and the like, as well as components, Variables. The functions provided in the components and in the sections ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ' , '~', '~', '~', '~', And '~' modules with additional components.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings attached hereto.

1 is a schematic structural view of a pressure relief valve 10 according to an embodiment of the present invention.

1, the pressure relief valve 10 includes an opening and closing part 11, a sensing part 12, a working part 13, and a measuring part 14.

The pressure relief valve 10 shown in FIG. 1 is a spring-type valve in which a spring is used as the operating portion 13 for driving the opening and closing portion 11. However, the pressure relief valve 10 is not limited to a spring-type valve, and the technical idea of the present invention can be applied to a valve operating according to an embodiment in various mechanisms.

The opening / closing part 11 opens / closes a fluid discharge path 17 that interacts with fluid to discharge the fluid. The sensing unit 12 senses at least one of the opening and closing of the fluid discharge path 17 by the opening and closing unit 11. The operating portion 13 acts to force the opening / closing portion 11 to close the fluid discharge path 17. The measuring unit 14 measures a force acting on the opening / closing unit 11 by the operating unit 13.

According to an embodiment of the present invention, the opening and closing part 11 may be shifted to an open state in which the fluid discharge path 17 is opened by the fluid when the pressure of the fluid exceeds a predetermined threshold pressure.

FIG. 2 is a view schematically showing a state in which the pressure relief valve 10 is opened according to an embodiment of the present invention.

As shown in FIG. 2, when the pressure of the fluid interacting with the pressure relief valve 10 is increased, the opening and closing part 11 can be moved by the fluid to open the fluid discharge path 17.

Referring to FIGS. 1 and 2, the opening and closing part 11 may be actuated to maintain a closed state of closing the fluid discharge path 17 by the operating part 13. The force acting on the opening and closing part 11 in the pressure relief valve 10 shown in Figs. 1 and 2 is an elastic force by a spring. However, the kind of force acting on the opening / closing part 11 to close the fluid discharge path 17 differs depending on the type of the pressure relief valve 10. [

The spring-type pressure relief valve 10 shown in FIGS. 1 and 2 is provided with a pressure adjusting screw 16 provided on the body 15 so as to adjust the length of the spring corresponding to the operating portion 13, Can be adjusted.

For example, as the pressure adjusting screw 16 is rotated and inserted into the body 15, the length of the spring is shortened to increase the operating pressure for closing the valve (i.e., the minimum pressure required to open the valve) On the other hand, as the pressure adjusting screw 16 is rotated and pulled out from the body 15, the length of the spring becomes longer, so that the operating pressure for closing the valve (that is, the minimum pressure required to open the valve) have.

The pressure acting on the opening and closing part 11 by the operating part 13 by the pressure adjusting screw 16 in the closed state in which the opening and closing part 11 closes the fluid discharge path 17 is applied to the pressure relief valve 10 Lt; / RTI > can be determined.

The sensing unit 12 may sense at least one of the opening and closing of the fluid discharge path 17 by the opening and closing unit 11. [

According to an embodiment of the present invention, the sensing unit 12 may include a contact sensor for sensing whether the opening / closing unit 11 and the fluid discharge path 17 are in contact with each other.

For example, referring to the closed state pressure relief valve 10 and the open state pressure relief valve 10 in FIG. 1, the sensing part 12 may be configured such that the opening / When the opening and closing part 11 opens the fluid discharge path 17, the pressure by the body 15 is released so that the opening and closing part 11 To detect the open state or the closed state of the fluid discharge path 17.

However, the arrangement of the sensing unit 12 is not limited to that shown in FIGS. 1 and 2, and it is possible to distinguish between the opened state and the closed state of the fluid discharge path 17 by the opening / As shown in FIG.

The sensing unit 12 senses the flow of the fluid through the fluid discharge path 17 in addition to the contact sensor that detects the state of the opening and closing unit 11 in response to the contact of the sensor, .

3 is a schematic structural view of a pressure relief valve 10 according to another embodiment of the present invention.

As shown in FIG. 3, according to another embodiment of the present invention, the sensing unit 12 may include a flow rate sensor for sensing a flow of fluid through the fluid discharge path 17.

In this embodiment, the flow sensor is disposed in the fluid discharge path 17 and does not sense the flow of fluid when the fluid discharge path 17 is closed by the opening / closing part 11, When the fluid discharge path 17 is opened, the flow of the fluid can be detected to indicate the state of the opening and closing part 11. [

In addition, the present invention may use a sensor for sensing the open and closed states of the opening and closing part 11 as the sensing part 12, by operating various mechanisms.

The measuring unit 14 measures a force acting on the opening / closing unit 11 by the operating unit 13.

According to an embodiment of the present invention, the measuring unit 14 may include a load sensor for measuring a load by the operating unit 13.

1 to 3, the measuring unit 14 includes a load cell disposed at an end of a spring used as the operating unit 13, Can be measured.

1 to 3, the measuring part 14 is disposed between the operating part 13, i.e., one end of the spring and the pressure adjusting screw 16, and measures the elastic force by the spring. However, (15) or disposed between the other end of the spring and the sensing part (12) to measure the elastic force by the spring. That is, the measuring unit 14 according to the embodiment of the present invention may be disposed at various positions as long as the force applied by the operating unit 13 to the opening and closing unit 11 is measured.

In addition to the load cells, various types of sensors may be used as the measuring unit 14, as long as they can measure the force acting by the operating unit 13. [

According to an embodiment of the present invention, the sensing unit 12 senses at least one of the opening and closing of the fluid discharge path 17 by the opening / closing unit 11 and outputs a first signal. The measuring unit 14 may measure a force acting on the opening and closing unit 11 by the operating unit 13 and output a second signal.

Hereinafter, embodiments of the present invention relating to a valve monitoring apparatus for monitoring the pressure relief valve 10 by processing the first and second signals will be described.

4 is a schematic diagram of a valve system 100 including a valve monitoring device 20 in accordance with an embodiment of the present invention.

4, the valve system 100 includes a pressure relief valve 10 and a valve monitoring device 20 which includes an input 21, a controller 22, And an output unit 23.

The input unit 21 receives a first signal indicating whether the valve 10 is opened or closed from a valve 10 for regulating the pressure of the fluid to a critical pressure or less and a second signal indicating an operation pressure for closing the valve 10 And receives a signal.

4, the input unit 21 is an input device for receiving the first signal and the second signal from the sensing unit 12 and the measurement unit 14, respectively, The input interface can be configured.

The controller 22 processes the first signal and the second signal to monitor the operating pressure of the valve 10. [

The control unit 22 includes a processing unit for processing signals, and may include a processor such as a controller, a microcomputer, and a CPU. The control unit 22 may process the input first and second signals according to logic or algorithm and output a signal indicating data obtained by monitoring.

The output unit 23 can output a signal indicating the monitoring result of the operating pressure obtained by the signal processing of the control unit 22. [

The output unit 23 may include an output device for providing information to the manager who manages the valve 10.

For example, the output unit 23 may include a display device such as an LCD for visually displaying data on a screen and providing the data to an administrator. As another example, the output unit 23 may include a voice output device, such as a speaker, for providing data to the manager by voice. As another example, the output unit 23 may include a printing device, such as a printer, for printing data on a print medium such as paper and providing it to the manager.

However, the output unit 23 is not limited to the above embodiment, and may be variously configured as long as it provides data indicative of the monitoring result of the operating pressure to the manager. For example, the output unit 23 may include a communication device for transmitting a monitoring result to a terminal of an administrator.

According to the embodiment of the present invention, the input unit 21 can continuously receive the first and second signals from the valve 10.

In other words, the input unit 21 can continuously receive the first signal and the second signal during the monitoring of the valve. For example, the input unit 21 may periodically sample the first and second signals to periodically acquire the open / close state of the opening / closing unit 11 and the force of the operating unit 13. However, the input unit 21 does not always need to periodically obtain information from the first and second signals, and may also obtain information non-periodically.

The controller 22 processes the first and second signals to monitor the operation of the valve 10.

According to an embodiment of the present invention, the control unit 22 detects the timing of transition of the valve 10 from the closed state to the open state based on the first signal, The operating pressure can be obtained based on the signal.

5 is a diagram illustrating exemplary waveforms of first and second signals input to the valve monitoring apparatus 20 according to an embodiment of the present invention.

5, the input unit 21 can continuously receive the first signal and the second signal from the valve, that is, the sensing unit 12 and the measurement unit 14, respectively, The controller 22 may periodically sample the first and second signals at predetermined time intervals? T to obtain the state of the valve 10 and the pressure acting on the operating portion 13. [

According to this embodiment, the control unit 22 detects the timing of transition of the valve 10 from the closed state to the open state based on the first signal, and detects the timing of transition of the second signal The operation pressure of the valve 10 can be obtained.

For example, 5, the first signal is the time bar, the control unit 22 the valve (10 at time t 2 logically have a low level with high-level logical at time t 2 at t 1 ) Transitions from the closed state to the open state. Thus, the timing at which the valve 10 transitions from the closed state to the open state has a logic level (for example, a low level in FIG. 5) corresponding to the closed state of the first signal and a logic level For example, a high level in Fig. 5).

Then, the control unit 22 can obtain the operating pressure of the valve 10 based on the second signal inputted before the detected timing t 2 .

For example, referring to FIG. 5, according to the second signal inputted at the time t 1 immediately before the time t 2 when the state transition of the valve 10 occurred, the pressure measured by the measuring unit 14 is P 1 , The controller 22 can determine the pressure measured immediately before the state transition of the valve 10 to be performed as the operating pressure of the valve 10. [

Thus, the control unit 22 processes the first and second signals continuously input to determine the pressure measured before the timing at which the state transition of the valve 10 occurs, as the operating pressure of the valve 10, The control unit 22 may include a storage unit 221 for storing the first and second signals. The storage device 221 may use a storage device capable of quickly storing and recalling a small amount of data. For example, the storage device 221 may include a register or the like. However, the control unit 22 need not necessarily use the storage device 221 to process the first and second signals as described above, and may have a circuit implemented according to various methods.

5, the control unit 22 controls the pressure P 1 at time t 1 immediately before the timing t 2 at which the valve 10 is shifted from the closed state to the open state to the valve 10 It is not always necessary to limit the time at which the operating pressure is read from the second signal to the immediately preceding sampling time as long as it is temporally ahead of the state transition timing t 2 . For example, in FIG. 5, the control unit 22 may determine the pressure P 0 at the time t 0 which is temporally ahead of the state transition timing t 2 by 2 ·? T, as the operating pressure of the valve 10.

According to another embodiment of the present invention, the control unit 22 detects the timing at which the valve 10 transitions from the open state to the closed state based on the first signal, The operating pressure of the valve 10 may be obtained.

In other words, according to this embodiment, the valve monitoring apparatus 100 can determine the operating pressure of the valve 10 based on the timing at which the valve 10 transitions from the open state to the closed state, as opposed to the above embodiment .

For example, 5, the first signal is the time bar, the control unit 22 the valve (10 at time t 4 has a high level logically t 3 having a logically low level at time t 4 ) Transitions from the open state to the closed state. As described above, the timing at which the valve 10 transitions from the open state to the closed state has a logic level (for example, a high level in FIG. 5) corresponding to the open state and a logic level For example, a low level in Fig. 5).

Then, the controller 22 can obtain the operating pressure of the valve 10 based on the second signal inputted at the detected timing t 4 .

For example, referring to FIG. 5, according to the second signal inputted at the time t 4 when the state transition of the valve 10 occurs, the pressure measured by the measuring unit 14 is P 4 , and the control unit 22 Can determine the pressure measured when the state transition of the valve 10 occurs as the operating pressure of the valve 10.

Further, the control section 22 in this embodiment, but determining a pressure P 4 at a timing t 4 to transition to the closed state from the opened valve 10 to the operating pressure of the valve 10, the operating pressure of the It may be read from the second signal later than the state transition timing t 4 . For example, in FIG. 5, the control unit 22 may determine the pressure P 5 at the time t 5 that is delayed by? T from the state transition timing t 4 by the operation pressure of the valve 10.

According to an embodiment of the present invention, the control unit 22 calculates a difference between the obtained operating pressure and a predetermined threshold pressure, and when the difference exceeds the predetermined allowable value, .

The critical pressure and the allowable value may be preset and stored in the control unit 22. Here, the critical pressure corresponds to the critical pressure described with reference to Figs. 1 to 3, and the manager physically sets the critical pressure to the pressure relief valve 10 using the pressure adjusting screw 16 or the like , It is also possible to electrically set the critical pressure for the valve monitoring device 20.

Figure 6 is an exemplary flow diagram of a valve monitoring method 200 in accordance with one embodiment of the present invention.

The valve monitoring method 200 may be performed by the valve monitoring apparatus 20 according to the embodiment of the present invention described above.

Referring to FIG. 6, the valve monitoring method 200 includes steps of receiving (S210) first and second signals from a valve 10, processing the first and second signals to close the valve 10 (S220), and outputting a monitoring result of the operating pressure (S230).

According to an embodiment of the present invention, the step of receiving the first and second signals (S210) may include receiving the first and second signals continuously.

FIG. 7 is an exemplary flow chart illustrating the process of processing the first and second signals to monitor the operating pressure (S220) in accordance with an embodiment of the present invention.

Referring to FIG. 7, the step of processing the first and second signals to monitor the operating pressure (S220) may include a step of switching the valve 10 from the closed state to the open state based on the first signal step of FIG detect t 2) at 5 (S221), the above type than the detected timing second signal (e.g., the second signal) based the operating pressure of from t 1 5 (e.g., in Figure 5 step (S223) for obtaining a P 1), if it exceeds a step (S225), and the difference is a predetermined allowable value to calculate a difference between the obtained operating pressure and a predetermined threshold pressure (YES in S226), the valve (S228) that the mobile terminal 10 is operating abnormally.

According to this embodiment, if the difference is less than or equal to the tolerance (NO in S226), the valve 10 may be determined to operate normally (S227).

FIG. 8 is an exemplary flow chart illustrating the process of processing the first and second signals to monitor the operating pressure (S220) in accordance with another embodiment of the present invention.

Referring to FIG. 8, the step S220 of processing the first and second signals to monitor the operation pressure S220 may include a step of switching the valve 10 from the open state to the closed state based on the first signal (for example, Fig t 4) the detecting step (S222), wherein the timing or higher later input detecting a second signal (e.g., the second signal) based on the operating pressure of from 5 t 4 (e.g., 5 to 5 step (S224), if the step (S225) for calculating a difference between the obtained operating pressure and a predetermined threshold pressure, and the difference period exceeds the set allowable value (YES in S226) for obtaining a P 4) in the And determining (S228) that the valve 10 is operating abnormally.

In this embodiment, if the difference is smaller than or equal to the allowable value (NO in S226), the valve 10 may be determined to operate normally (S227).

The valve monitoring method 200 may be implemented as a program for execution on a computer and stored in a computer-readable recording medium. The computer-readable recording medium includes all kinds of storage devices in which data that can be read by a computer system is stored. Examples of the computer-readable recording medium include ROM, RAM, CD-ROM, magnetic tape, floppy disk, optical data storage, and the like. In addition, the valve monitoring method 200 may be implemented as a computer program stored on a medium for execution in association with the computer.

According to the embodiment of the present invention, the pressure relief valve 10 can be calibrated and calibrated without separating it from the facility, so that it is possible to perform a simple calibration and reduce the process loss due to valve separation during calibration.

Further, the embodiment of the present invention can reliably perform the calibration of the valve by suitably acquiring the pressure required to open the valve.

While the present invention has been described with reference to the exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. Those skilled in the art will appreciate that various modifications may be made to the embodiments described above. The scope of the present invention is defined only by the interpretation of the appended claims.

10: Pressure Relief Valve
11:
12:
13:
14:
15: Body
16: Pressure adjusting screw
17: fluid discharge path
20: Valve monitoring device
21:
22:
23: Output section
100: Valve system

Claims (10)

delete delete delete delete delete delete A first signal indicating whether the valve is open or closed from a valve for controlling a pressure of the fluid to be equal to or less than a critical pressure and a second signal relating to a pressure applied to the valve by the fluid;
A controller for processing the first signal and the second signal to calculate an operating pressure that is a minimum pressure required to open the valve, and monitoring the operating pressure; And
An output unit for outputting a monitoring result on the operating pressure;
Lt; / RTI >
Wherein,
Sampling the first signal and the second signal at predetermined time intervals, detecting a timing at which the valve transitions from the closed state to the open state based on the first signal, And acquires the pressure of the second signal inputted earlier by the interval with the operating pressure. delete delete 8. The method of claim 7,
The control unit includes:
Calculating a difference between the obtained operating pressure and predetermined threshold pressure,
And determines that the valve malfunctions if the difference exceeds a predetermined tolerance.
KR1020150167227A 2015-11-27 2015-11-27 Pressure relief valve and apparatus for monitoring valve KR101885162B1 (en)

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