Pressure safety valve for ultra-low temperature and ultra-high pressure and pressure safety valve monitoring and control system including same

Abstract

The present invention relates to a pressure safety valve for ultra-low temperature and ultra-high pressure and a pressure safety valve monitoring and control system including same, wherein when a problem occurs in a pressure spring, a stem is forcibly moved by an auxiliary driving means rather than adjusting the pressure spring so that the valve can be opened / closed, thereby reducing the occurrence of safety-related accidents.

Description

Pressure safety valve for cryogenic ultra-high pressure and pressure safety valve monitoring and control system including the same

[0001] The present invention relates to a pressure safety valve for ultra-high pressure cryogenic temperatures and a pressure safety valve monitoring and control system including the same. More specifically, the invention relates to a pressure safety valve for ultra-high pressure cryogenic temperatures and a pressure safety valve monitoring and control system including the same, which can open the valve to relieve an overpressure condition when the pressure at the location where the valve is installed is greater than or equal to a set pressure.

[0002] Generally, a pressure safety valve is a device that is mainly installed in containers such as tanks that contain fluid or in pipes through which fluid is transported. When an overpressure condition occurs where the pressure at the installed location is higher than the set pressure, the valve opens to lower the pressure inside the container or pipe to below the set pressure, thereby preventing safety accidents or damage to equipment caused by overpressure.

[0003] In the case of a conventional pressure safety valve, it is configured so that the valve does not open by utilizing the force applied by a spring, and when the pressure exceeds the set pressure, the spring is compressed by a force greater than the force applied by the spring due to the overpressure, thereby opening the valve and allowing fluid to be discharged to the outside so that the overpressure can be relieved.

[0004] However, when the valve is configured to open and close using a spring as described above, as time passes, the elastic modulus of the spring gradually decreases, causing the valve to open even at a pressure lower than the initial set pressure, or the spring becomes stuck, preventing the valve from opening even at a pressure higher than the set pressure, which leads to safety accidents such as explosions caused by overpressure, and a solution to this is required.

[0005] In this regard, Korean Registered Patent No. 10-2762341 describes a valve designed to ensure safety by discharging pressure to the outside when it exceeds a set pressure. Although some technology has been developed to resolve the problem of the spring's elastic modulus decreasing or becoming stuck over time, conventional technologies employ a structure that addresses the problem by adjusting the elastic modulus or pressure of the valve's pressure spring. However, in practice, for pressure safety valves, the seal is fastened with the pressure spring for valve opening and closing adjusted to a set value by the Korea Gas Safety Agency, making it impossible to adjust the pressure of the spring during subsequent use. Furthermore, improvements are needed in this regard as conventional technologies are not configured to automatically detect and resolve issues when a problem occurs with the pressure spring for valve opening and closing.

[0006] The objective of the present invention is to provide a cryogenic ultra-high pressure pressure safety valve configured so that valve opening and closing can be achieved by an auxiliary driving means rather than by adjusting the pressure spring when a problem occurs with the pressure spring, and a pressure safety valve monitoring and control system including the same.

[0007] The problem that the present invention aims to solve is not limited to the problem described above, and may be expanded in various ways without departing from the spirit and scope of the present invention.

[0008] A pressure safety valve for cryogenic ultra-high pressure according to embodiments of the present invention for achieving the above-described objectives of the present invention comprises: a valve housing; a fluid transfer path formed at the lower part of the valve housing such that fluid is introduced through an inlet at one end and discharged through an outlet at the other end; a main driving means including a disc provided inside the valve housing to open and close the outlet, a stem coupled to the upper part of the disc, and a pressure spring provided to provide a pressurizing force to push the stem downward so that the disc closes the outlet; and an auxiliary driving means provided outside the valve housing, coupled to the upper part of the stem which penetrates the upper part of the valve housing and extends to the outside of the valve housing, and provided to provide a pressurizing force so that the stem can move in both upward and downward directions.

[0009] Additionally, in one embodiment, the stem is formed to protrude outwardly from the upper part and is provided with a locking portion, and the auxiliary driving means comprises a cylinder housing in which the locking portion of the stem is received, an opening piston disposed below the locking portion of the stem inside the cylinder housing, a first through hole formed penetrating the side portion of the cylinder housing to supply air to the lower space of the opening piston inside the cylinder housing, a closing piston disposed above the stem inside the cylinder housing, a second through hole formed penetrating the side portion of the cylinder housing to supply air to the upper space of the closing piston inside the cylinder housing, and an elastic member provided interposed between the opening piston and the closing piston to apply a pushing force in a direction in which the opening piston and the closing piston are spaced apart from each other.

[0010] In addition, in one embodiment, the main driving means is characterized in that the stem is configured to protrude outwardly from the circumference to form a seating portion, and a lower disc, a pressure spring, and an upper disc are sequentially arranged on the upper side of the seating portion, and a pressure sensor is provided interposed between the upper side of the seating portion and the lower side of the lower disc to detect the magnitude of the pressure applied to the disc.

[0011] In addition, a monitoring and control system for a cryogenic ultra-high pressure pressure safety valve according to embodiments of the present invention comprises: a valve housing; a fluid transfer path formed at the bottom of the valve housing such that fluid is introduced through an inlet at one end and discharged through an outlet at the other end; a main driving means including a disc provided inside the valve housing to open and close the outlet, a stem coupled to the upper part of the disc, and a pressure spring provided to provide a pressurizing force to push the stem downward so that the disc closes the outlet; a cryogenic ultra-high pressure pressure safety valve provided outside the valve housing, coupled to the upper part of the stem which penetrates the upper part of the valve housing and extends to the outside of the valve housing, and provided to provide a pressurizing force so that the stem can move in both upward and downward directions; a pressure sensing unit provided to detect fluid pressure at a location where the cryogenic ultra-high pressure pressure safety valve is installed; and a device for detecting the upward and downward movement of the stem. It is characterized by including a drive detection unit, a monitoring unit that receives information detected by the pressure detection unit and the drive detection unit and monitors whether a problem has occurred in the cryogenic ultra-high pressure safety valve including the pressure spring, and a drive control unit that is configured to control the drive of the auxiliary drive means so that the auxiliary drive means is driven when it is confirmed by the monitoring unit that a problem has occurred in the pressure spring.

[0012] In addition, in one embodiment, the monitoring unit determines that the pressure spring is in a normal state when it is confirmed that the pressure detected through the pressure sensing unit is greater than or equal to a preset limit pressure corresponding to a set pressure and the upward movement of the stem is detected by the driving sensing unit, and when the upward movement of the stem is not detected by the driving sensing unit, the pressure spring is determined to be in an abnormal state and provides a notification to the driving control unit, thereby controlling the driving of the auxiliary driving means so that the stem is moved upward by the driving control unit to open the valve.

[0013] In addition, in one embodiment, the monitoring unit is configured such that when the pressure detected by the pressure sensing unit is confirmed to be lower than a preset limit pressure corresponding to the set pressure, if the upward movement of the stem is not detected by the driving sensing unit, the pressure spring is determined to be in a normal state, and if the upward movement of the stem is detected by the driving sensing unit, the pressure spring is determined to be in an abnormal state, and provides a notification to the driving control unit, thereby controlling the driving of the auxiliary driving means so that the stem is moved downward by the driving control unit to maintain the valve in a closed state.

[0014] In addition, in one embodiment, the monitoring and control system for a cryogenic ultra-high pressure pressure safety valve according to the embodiments of the present invention further comprises an inlet environment measuring unit positioned at a location close to the inlet and configured to detect at least one of the temperature, sound, and vibration of the inlet portion, and a discharge environment measuring unit positioned at a location close to a discharge hole configured to discharge the fluid flowing into the valve housing through the inlet of the cryogenic ultra-high pressure pressure safety valve to the outside, and configured to detect at least one of the pressure, temperature, sound, and vibration of the discharge hole portion, wherein the monitoring unit receives information detected by the pressure sensing unit, the actuation sensing unit, the inlet environment measuring unit, and the discharge environment measuring unit, and is configured to monitor whether a problem has occurred in the cryogenic ultra-high pressure pressure safety valve.

[0015] In addition, in one embodiment, the monitoring unit is configured to utilize information previously measured and collected from a pressure sensing unit, an actuation sensing unit, an inflow environment measuring unit, and an outflow environment measuring unit to extract characteristic data necessary for predicting signs of a problem in the cryogenic ultra-high pressure safety valve from the collected information, prepare learning data for signs of a problem in the cryogenic ultra-high pressure safety valve according to the extracted characteristic data, and, through an artificial intelligence model constructed using the prepared learning data, analyze signs of a problem in the cryogenic ultra-high pressure safety valve in real time using information detected and transmitted from the pressure sensing unit, the actuation sensing unit, the inflow environment measuring unit, and the outflow environment measuring unit, and provide analysis results.

[0016] The pressure safety valve for ultra-high pressure cryogenics according to the present invention comprises a valve housing, a fluid transfer path, a main driving means, and an auxiliary driving means. It is configured so that even if a problem occurs with the pressure spring of the main driving means, the stem can be forcibly moved through the auxiliary driving means to open and close the valve, thereby reducing the occurrence of safety accidents caused by overpressure and improving safety.

[0017] In addition, the monitoring and control system for a cryogenic ultra-high pressure pressure safety valve according to the present invention includes a cryogenic ultra-high pressure pressure safety valve, a pressure sensing unit, an actuation sensing unit, a monitoring unit, and an actuation control unit. It has the advantage of enabling rapid response in the event of a problem by detecting whether a problem has occurred in the pressure spring of the pressure safety valve and allowing the valve to be opened or closed automatically by an auxiliary actuation means when a problem occurs.

[0018] The effects of the present invention are not limited to those mentioned above, and unmentioned effects will be clearly understood by those skilled in the art from the description below.

[0019] FIG. 1 is a perspective view of a pressure safety valve for ultra-high temperature and cryogenic pressure according to an embodiment of the present invention.

[0020] FIG. 2 is a cross-sectional view of a pressure safety valve for ultra-high temperature and cryogenic pressure according to an embodiment of the present invention.

[0021] FIG. 3 is an enlarged view of the portion where fluid flows into and is discharged from the valve housing in a cryogenic ultra-high pressure pressure safety valve according to an embodiment of the present invention.

[0022] FIG. 4 is a drawing showing an enlarged view of a part of the main driving means in a cryogenic ultra-high pressure pressure safety valve according to an embodiment of the present invention.

[0023] FIG. 5 is an enlarged view of the auxiliary driving means portion of a cryogenic ultra-high pressure pressure safety valve according to an embodiment of the present invention.

[0024] FIG. 6 is an enlarged drawing showing another example of a portion where fluid flows into and is discharged from the valve housing in a cryogenic ultra-high pressure pressure safety valve according to an embodiment of the present invention.

[0025] FIG. 7 is an enlarged view of another example of an auxiliary driving means portion in a cryogenic ultra-high pressure pressure safety valve according to an embodiment of the present invention.

[0026] FIG. 8 is a schematic diagram showing the configuration of a pressure safety valve monitoring and control system according to an embodiment of the present invention.

[0027] FIG. 9 is a diagram illustrating the process of monitoring whether a problem occurs when the valve is closed in a pressure safety valve monitoring and control system according to an embodiment of the present invention.

[0028] FIG. 10 is a diagram illustrating the process of monitoring whether a problem occurs when the valve is open in a pressure safety valve monitoring and control system according to an embodiment of the present invention.

[0029] The advantages and features of the present invention and the methods for achieving them will become clear by referring to the embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below but may be implemented in various different forms. These embodiments are provided merely to ensure that the disclosure of the present invention is complete and to fully inform those skilled in the art of the scope of the invention, and the present invention is defined only by the scope of the claims. Throughout the entire specification, the same reference numerals refer to the same components.

[0030] With respect to the embodiments of the present invention disclosed in this text, specific structural or functional descriptions are provided merely for the purpose of explaining the embodiments of the present invention, and the embodiments of the present invention may be implemented in various forms and should not be interpreted as being limited to the embodiments described in this text.

[0031] The present invention is capable of various modifications and may take various forms, and specific embodiments are illustrated in the drawings and described in detail in the text. However, this is not intended to limit the invention to the specific disclosed forms, and it should be understood that the invention includes all modifications, equivalents, and substitutions that fall within the spirit and scope of the invention.

[0032] Terms such as "first," "second," etc., may be used to describe various components, but said components should not be limited by said terms. These terms may be used for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be named the second component, and similarly, the second component may be named the first component.

[0033] The terms used in this specification are used merely to describe specific embodiments and are not intended to limit the invention. The singular expression includes the plural expression unless the context clearly indicates otherwise. In this application, terms such as "comprising" or "having" are intended to specify the existence of the described features, numbers, steps, actions, components, parts, or combinations thereof, and should be understood as not precluding the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.

[0034] Furthermore, in the present specification, when it is stated that a component is located “on” another component, this includes not only cases where a component is in contact with another component but also cases where another component exists between the two components. When it is mentioned that a component is “connected” or “joined” to another component, it should be understood that it may be directly connected or joined to that other component, or that there may be other components in between. On the other hand, when it is mentioned that a component is “directly connected” or “directly joined” to another component, it should be understood that there are no other components in between. Other expressions describing the relationship between components, such as “between” and “immediately between” or “adjacent to” and “directly adjacent to,” should be interpreted in the same way.

[0035] Additionally, for the sake of convenience of explanation, the terms left, right, up, down, front, back, and similar designations for each direction are based on the drawings and may vary depending on the viewing direction or the arrangement of components.

[0036] FIG. 1 is a perspective view of a cryogenic ultra-high pressure pressure safety valve (10) according to an embodiment of the present invention, FIG. 2 is a cross-sectional view of a cryogenic ultra-high pressure pressure safety valve (10) according to an embodiment of the present invention, FIG. 3 is an enlarged view showing a portion where fluid flows into and is discharged from the valve housing (100) in the cryogenic ultra-high pressure pressure safety valve (10) according to an embodiment of the present invention, FIG. 4 is an enlarged view showing a portion of the main driving means (300) in the cryogenic ultra-high pressure pressure safety valve (10) according to an embodiment of the present invention, FIG. 5 is an enlarged view showing a portion of the auxiliary driving means (400) in the cryogenic ultra-high pressure pressure safety valve (10) according to an embodiment of the present invention, FIG. 6 is an enlarged view showing another example of a portion where fluid flows into and is discharged from the valve housing (100) in the cryogenic ultra-high pressure pressure safety valve (10) according to an embodiment of the present invention, FIG. 7 is the This is a drawing showing an enlarged view of another example of the auxiliary driving means (400) portion in the cryogenic ultra-high pressure pressure safety valve (10) according to an embodiment of the invention.

[0037] Referring to FIGS. 1 to 7, a pressure safety valve (10) for ultra-high temperature and ultra-high pressure according to an embodiment of the present invention comprises, mainly, a valve housing (100), a fluid transfer path (200), a main driving means (300), and an auxiliary driving means (400).

[0038] First, the valve housing (100) is formed in the cryogenic ultra-high pressure pressure safety valve (10) of the present invention, having a fluid passage formed therein and a main driving means (300) provided to control the discharge of fluid according to the pressure of the fluid. More specifically, as shown in FIG. 2, a plurality of bodies may be combined to form a single valve housing (100).

[0039] More specifically, the valve housing (100) may be configured to include a lower body (110) in which a fluid transfer path (200) is formed, an upper body (120) coupled to the upper part of the lower body (110) and having a discharge hole formed therein for discharging fluid, a first connecting body (130) coupled to the upper part of the upper body (120) and having a stem (320) of a main driving means (300) to be described later mounted inside, a second connecting body (140) coupled to the upper part of the first connecting body (130), and a spring receiving body (150) coupled to the upper part of the second connecting body (140) and forming a space inside which a pressure spring (340), etc. of a main driving means (300) to be described later is mounted as a space separated from the internal space of the first connecting body (130), and the second connecting body (140) has a first At least one sealing member, such as a gasket or a bellows, may be provided to provide airtightness between the internal space of the connecting body (130) and the internal space of the spring receiving body (150).

[0040] Additionally, the valve housing (100) may be configured to further include a vacuum insulation jacket provided on the outer side of the lower body (110) and upper body (120) to block external heat, as shown in FIG. 2.

[0041] Next, the fluid transfer path (200) is provided in the lower part of the valve housing (100), more specifically in the lower body (110) portion of the valve housing (100), and is a passage formed to transfer excess pressure so that fluid is introduced through an inlet at one end and discharged in an excess pressure state through an outlet at the other end. At this time, a coupling may be provided at the end where the inlet is formed.

[0042] Next, the main driving means (300) enables the opening and closing of the valve in the ultra-high pressure safety valve (10) of the present invention, and more specifically includes a disc (310) provided to open and close an outlet inside the valve housing (100), a stem (320) coupled to the upper part of the disc (310), and a pressure spring (340) provided to provide a pressure force to push the stem (320) downward so that the disc (310) closes the outlet.

[0043] When configured as described above, when the fluid pressure in the fluid transfer path (200) is lower than the set pressure, the pressure is applied to the stem (320) and the disk (310) by the pressure spring (340), causing the disk (310) to come into close contact with the discharge port and close the discharge port. When the fluid pressure in the fluid transfer path (200) becomes higher than the set pressure, the pressure spring (340) is compressed by the fluid pressure, thereby allowing the stem (320) and the disk (310) to move upward in conjunction, causing the disk (310) to be separated from the discharge port and allowing fluid to be discharged through the discharge port and released to the outside through the discharge hole of the main housing, thereby relieving the overpressure.

[0044] Meanwhile, the stem (320) may be composed of a single body, or, as illustrated in FIG. 2, a plurality of bodies may be combined along the axial vertical direction to form a single stem (320).

[0045] More specifically, the stem (320) may be configured to include a first shaft body (321) which is formed such that its lower portion is coupled to the disk (310) and extends upward so as to be located inside the first connecting body (130) and the second connecting body (140), and its upper portion is positioned inside the spring receiving body (150); a second shaft body (322) which is formed such that its lower portion is coupled to the first shaft body (321) and its upper portion extends upward through the spring receiving body (150); and a third shaft body (324) which is formed such that its lower portion is directly coupled to the second shaft body or connected by a separate connecting member as shown in FIG. 2, and its upper portion is connected to an auxiliary driving means (400) to receive driving force so as to be able to move up and down by the auxiliary driving means (400). At this time, a sealing member such as a bellows or a gasket may be provided on the circumference of the first shaft body (321), a pressure spring (340) may be provided on the circumference of the second shaft body (322), and a seating portion (323) may be formed on the lower circumference of the second shaft body (322) by protruding outward.

[0046] Additionally, as shown in FIG. 6, the disc (310) may be configured such that a separate contact body (311) is detachably attached to the part in contact with the outlet of the fluid transfer path (200), so that if the contact body (311) is damaged, only the contact body (311) can be replaced. Furthermore, to improve the wear resistance of the contact body (311), it may be made of, for example, austenitic stainless steel (SS316). Additionally, a tungsten carbide thermal spray coating may be further applied to at least one of the disc (310), the contact body (311), and the outlet part of the fluid transfer path (200) of the contact body (311) which is the seat part in contact with it.

[0047] Next, the auxiliary driving means (400) enables the opening and closing of the valve in a situation where the opening and closing operation of the valve cannot be performed due to a problem with the pressure spring (340) of the main driving means (300) in the ultra-low temperature ultra-high pressure pressure safety valve (10) of the present invention. The auxiliary driving means (400) is provided outside the valve housing (100), and the upper part of the stem (320) of the main driving means (300) is configured to penetrate the upper part of the valve housing (100) and extend upward on the valve housing (100). The part extended outside the valve housing (100) is combined with the auxiliary driving means (400), so that the auxiliary driving means (400) can provide a pressurizing force to allow the stem (320) to move in the axial upward and downward direction.

[0048] More specifically, for example, a stem (320) is provided with a locking part that is formed protruding outwardly on the upper portion of the upper portion of the valve housing (100) that extends upward through the upper portion of the valve housing (100), and at this time, the auxiliary driving means (400) comprises a cylinder housing (410) which is provided such that the locking part of the stem (320) is received inside and the stem (320) is prevented from being dislodged by the locking part, an opening piston (420) disposed below the locking part of the stem (320) inside the cylinder housing (410), a first through hole (430) formed by penetrating the side portion of the cylinder housing (410) to supply air to the lower space of the opening piston (420) inside the cylinder housing (410), a closing piston (440) disposed above the stem (320) inside the cylinder housing (410), and air to the upper space of the closing piston (440) inside the cylinder housing (410). It may be configured to include a second through hole (450) formed by penetrating the side portion of the cylinder housing (410) to supply, and an elastic member (460) provided interposed between the opening piston (420) and the closing piston (440) to apply a pushing force in a direction in which the opening piston (420) and the closing piston (440) are separated from each other.

[0049] When configured as described above, air is supplied from an air supply means (not shown) through the first through hole (430) and injected into the lower space of the opening piston (420) inside the cylinder housing (410), causing the opening piston (420) to move upward. As a result, the opening piston (420) comes into contact with the locking part of the stem (320) and can provide a pressing force that pushes upward. Consequently, even if a problem such as sticking occurs in the pressure spring (340) of the main driving means (300), the stem (320) and the disk (310) can be moved upward so that the disk (310) is separated from the discharge port, allowing the valve to be opened and the overpressure to be relieved.

[0050] In addition, conversely, air is supplied from the air supply means through the second through hole (450) and injected into the upper space of the closing piston (440) inside the cylinder housing (410), causing the closing piston (440) to move downward. As a result, the closing piston (440) comes into contact with the upper part of the stem (320) and can provide a downward pushing pressure. Consequently, even if a problem such as sticking occurs with the pressure spring (340) of the main driving means (300), the stem (320) and the disc (310) can be moved downward so that the disc (310) comes into contact with the discharge port and the valve can be closed. At this time, the air injected into the cylinder housing (410) through the first through hole (430) can be discharged to the outside of the cylinder housing (410) through the air discharge means, so that the opening piston (220) moves downward and the force pushing the stem (320) upward can be released. At this time, for example, an air pump can be configured to provide the functions of an air supply means and an air discharge means.

[0051] Additionally, an air inlet may be installed in each of the first through hole (430) and the second through hole (450) to receive air from an air supply means. As shown in FIG. 1, the air inlet may be configured such that an air inlet path is formed to allow air injected into the cylinder housing (410) through the first through hole (430) and the second through hole (450) to be injected into the interior, and an air outlet path is integrally formed to allow air injected into the cylinder housing (410) through the first through hole (430) and the second through hole (450) to be discharged to the outside. An air supply means and an air discharge means are provided at the outer ends of the air inlet path and the air outlet path, respectively, so as to allow air to be injected into the cylinder housing (410) or air inside the cylinder housing (410) to be discharged to the outside of the cylinder housing (410). Meanwhile, according to an embodiment of the present invention, for ultra-low temperature ultra-high pressure As shown in FIG. 6, the pressure safety valve (10) is configured such that the valve housing (100) is provided with a seat body (160) that is separate from the lower body (110), so that a fluid transfer path (200) passes through the lower body (110) and the seat body (160) simultaneously, and a discharge port to which a disc (310) contacts is provided in the seat body (160), so that if the discharge port is damaged, only the seat body (160) can be replaced and used.

[0052] Additionally, as shown in FIG. 6, it is also possible to configure the upper body (120) of the valve housing (100) to accommodate a disc (310) and further provide a guide body (360) that guides the disc (310) to move up and down along the axial direction.

[0053] Meanwhile, the pressure safety valve (10) for ultra-high pressure cryogenic temperature according to an embodiment of the present invention, as shown in FIG. 7, may have an upward protrusion formed along the axial direction of the upper center of the closing piston (440) in the auxiliary driving means (400), and at this time, the cylinder housing (410) may have an upper guide groove formed in which the upward protrusion is fitted, so that the closing piston (440) can move up and down in the axial direction while the upward protrusion is fitted into the upper guide groove, thereby preventing the piston from tilting inside the cylinder housing (410) and restricting its upward movement, or causing damage, wear, etc.

[0054] Additionally, the opening piston (420) may have a downward protrusion formed extending downward along the axial direction at the lower center, and the cylinder housing (410) may have a recessed lower guide groove into which the downward protrusion is fitted, so that the opening piston (420) can move up and down in the axial direction while the downward protrusion is fitted into the lower guide groove, thereby preventing the opening piston (420) from tilting inside the cylinder housing (410), which would restrict its upward movement or cause damage, wear, etc.

[0055] Additionally, the opening piston (420) may be configured to have a recessed receiving groove formed on its upper portion to accommodate the locking portion of the stem (320).

[0056] Meanwhile, the opening piston (420) can be configured such that a gap is formed between the upper surface of the opening piston (420) and the lower surface of the locking part of the stem (320) when the stem (320) is moved downward as much as possible so that the disc (310) comes into contact with the discharge port and the valve is closed. This prevents damage or breakage from occurring between the lower surface of the locking part of the stem (320) and the upper surface of the opening piston (420) during the process of the stem (320) moving downward as much as possible.

[0057] Additionally, the closing piston (440) can be configured such that when it is maximally separated from the opening piston (420) by the elastic member (460), a gap is formed between the lower surface of the closing piston (440) and the upper surface of the stem (320). As a result, when the stem (320) is moved up and down by the main driving means (300), the closing piston (440) is prevented from coming into contact with the upper surface of the stem (320), thereby preventing breakage or damage to the closing piston (440).

[0058] Meanwhile, as shown in FIGS. 5 and 7, the cylinder housing (410) may be configured to include a first cylinder body (411) having an opening formed on the upper or lower side and a space formed to accommodate an opening piston (420) and a closing piston (440) inside, and a second cylinder body (412) coupled to the opening of the first cylinder body (411). In this case, if a problem such as breakage, deformation, or damage occurs to a part of the auxiliary driving means (400), it can be easily repaired.

[0059] Meanwhile, the pressure safety valve (10) for ultra-high pressure cryogenic temperature according to an embodiment of the present invention is configured such that, in the main driving means (300), the stem (320) protrudes outwardly from the circumference to form a seating portion (323), and a lower disc (330), a pressure spring (340), and an upper disc (350) are sequentially arranged on the upper side of the seating portion (323). At this time, a pressure sensor (500) may be provided to detect the magnitude of the pressure applied to the disc (310) and the stem (320) by the fluid pressure at the location where the pressure safety valve (10) for ultra-high pressure cryogenic temperature is installed, interposed between the upper part of the seating portion (323) and the lower part of the lower disc (330), and the pressure sensor (500) may be a load cell.

[0060] Additionally, the main driving means (300) may be provided with a spring adjustment mechanism that is screw-coupled to the upper part of the valve housing (100) when installing the cryogenic ultra-high pressure safety valve (10), so as to adjust the force with which the pressure spring (340) presses against the seating portion (323) of the stem (320) and the disc (310) according to the set pressure.

[0061] Additionally, the cryogenic ultra-high pressure pressure safety valve (10) according to an embodiment of the present invention may further include a displacement sensor that detects movement of the disc (310) and the stem (320) in the axial vertical direction. In this case, for example, the displacement sensor may be configured to include a limit switch that detects vertical movement of the stem (320) as shown in FIG. 2. In another example, although not shown in the drawings, the displacement sensor may be configured to detect vertical positional changes of the portion of the pressure sensor (500) that is positioned between the seating portion (323) and the lower disc (330) and extends outward from the spring receiving body (150) of the valve housing (100). In this case, the displacement sensor may be variously modified and applied as a means capable of detecting whether the stem (320) is moving, such as a strain gauge or a laser displacement sensor, and a means capable of detecting whether the stem (320) is moving, the direction of movement, and the magnitude of movement may all be applied. It is desirable.

[0062] FIG. 8 is a schematic diagram showing the configuration of a pressure safety valve monitoring and control system (320) according to an embodiment of the present invention, FIG. 9 is a diagram explaining the process of monitoring whether a problem occurs when the valve is closed in the pressure safety valve monitoring and control system (320) according to an embodiment of the present invention, and FIG. 10 is a diagram explaining the process of monitoring whether a problem occurs when the valve is open in the pressure safety valve monitoring and control system (320) according to an embodiment of the present invention.

[0063] Referring to FIGS. 8 to 10, the pressure safety valve monitoring and control system (320) according to an embodiment of the present invention largely comprises a cryogenic ultra-high pressure pressure safety valve (10), a pressure sensing unit (20), a driving sensing unit (30), a monitoring unit (40), and a driving control unit (50). At this time, the cryogenic ultra-high pressure pressure safety valve (10) is described above, and the pressure sensing unit (20), driving sensing unit (30), monitoring unit (40), and driving control unit (50) are examined in more detail as follows.

[0064] The pressure sensing unit (20) is for detecting fluid pressure at the location where the cryogenic ultra-high pressure pressure safety valve (10) is installed so as to check for overpressure. More specifically, for example, the pressure sensing unit (20) may include a pressure sensor (500) that is interposed between the seating portion (323) of the stem (320) and the lower disk (330) in the main driving means (300) of the cryogenic ultra-high pressure pressure safety valve (10) above, and is configured to detect the magnitude of the pressure applied to the disk (310) and the stem (320). As another example, the pressure sensing unit (20) may be configured to include a pressure sensor (500) which is interposed between the seating portion (323) of the stem (320) and the lower disk (330) in the main driving means (300) of the cryogenic ultra-high pressure safety valve (10) above to detect the magnitude of the pressure applied to the disk (310) and the stem (320), and a second pressure sensor (not shown) which is provided at a position close to the inlet of the fluid transfer path (120) to detect the pressure of the inlet portion.

[0065] The drive detection unit (30) is provided to detect the vertical movement of the stem (320) and may include a displacement sensor. In this case, for example, the drive detection unit (30) may be configured to include a limit switch that detects the vertical movement of the stem (320) as shown in FIG. 2. In another example, the drive detection unit (30) may include a displacement sensor configured to detect the vertical position change of the part extending to the outside of the spring receiving body (150) of the valve housing (100) of the pressure sensor (500) placed between the seating part (323) and the lower disc (330). In yet another example, the drive detection unit (30) may be configured to include both a limit switch and a displacement sensor.

[0066] The monitoring unit (40) is basically for monitoring whether a problem has occurred in the ultra-high pressure pressure safety valve (10) for ultra-low temperature ultra-high pressure, and receives information detected by the pressure sensing unit (20) and the driving sensing unit (30), and monitors whether a problem has occurred in the ultra-high pressure pressure safety valve (10), including the pressure spring (340), based on the received information.

[0067] The drive control unit (50) is configured to control the operation of the auxiliary drive means (400) so that when it is confirmed in the monitoring unit (40) that a problem has occurred in the pressure spring (340), the auxiliary drive means (400) of the ultra-low temperature ultra-high pressure pressure safety valve (10) is driven.

[0068] The monitoring and control system (320) for a cryogenic ultra-high pressure pressure safety valve (10) configured as described above continuously receives and analyzes information detected by the pressure detection unit (20) and the drive detection unit (30) in real time from the monitoring unit (40), and the operation process related to opening and closing the valve is examined in more detail as follows.

[0069] First, when the valve is closed, it is confirmed that the pressure detected through the pressure sensing unit (20) is greater than the preset limit pressure corresponding to the set pressure, and when the driving sensing unit (30) detects that the stem (320) has moved upward, it is determined that the cryogenic ultra-high pressure pressure safety valve (10), particularly the pressure spring (340), is in a normal state. Additionally, if the cryogenic ultra-high pressure pressure safety valve (10) is equipped with a limit switch as shown in FIGS. 1 and 2, a notification indicating the valve opening state can be configured to be output visually or audibly through the limit switch.

[0070] Meanwhile, when the valve is closed, if it is confirmed that the pressure detected through the pressure detection unit (20) is greater than the preset limit pressure corresponding to the set pressure, but the upward movement of the stem (320) is not detected by the drive detection unit (30), it is determined that the cryogenic ultra-high pressure pressure safety valve (10), particularly the pressure spring (340), is in an abnormal state (stuck), and at this time, a notification is provided to the drive control unit (50) to move the stem (320) upward through the auxiliary drive means (400), and the drive control unit (50) controls the auxiliary drive means (400) so that the auxiliary drive means (400) moves the stem (320) upward.

[0071] As a result, in the above case, even if a problem occurs with the pressure spring (340), the auxiliary driving means (400) is driven so that the valve is automatically opened and the overpressure can be relieved.

[0072] At this time, for reference, in the case where the pressure sensing unit (20) includes a first pressure sensor (500) which is interposed between the seating portion (323) of the stem (320) and the lower disk (330) to detect the magnitude of the pressure applied to the disk (310) and the stem (320), and a second pressure sensor which is provided at a position close to the inlet of the fluid transfer path (120) to detect the pressure in the inlet portion, first, in a state where the pressure in the inlet portion is not detected at the location where the cryogenic ultra-high pressure pressure safety valve (10) is mounted, and the first pressure sensor (500) is interposed between the seating portion (323) and the lower disk (330), the state in which only the downward pressure applied by the pressure spring (340) is detected by the first pressure sensor (500) becomes the initial reference value of the first pressure sensor (500), and as the pressure detected in the inlet portion gradually increases, the disk (310) and When the pressure value detected by the first pressure sensor (500) by the pressure applied by the stem (320) gradually increases from the initial reference value, and subsequently the pressure value detected by the second pressure sensor becomes the set pressure requiring valve opening, the pressure value detected by the first pressure sensor (500) can be initially set to become the limit pressure. Additionally, the second pressure sensor can be initially set so that the state where no pressure is detected at the inlet is the initial reference value, and the pressure detected at the inlet becomes the set pressure requiring valve opening, or a specific value pre-set by the user at the inlet corresponding to the set pressure becomes the limit pressure of the second pressure sensor.

[0073] Meanwhile, the monitoring unit (40) and the drive control unit (50) may be configured to include an interface, a microcomputer, etc., and the cryogenic ultra-high pressure safety valve (10) according to an embodiment of the present invention may be applied to a specific device or system, receiving information detected through a sensing means such as a pressure detection unit (20) and a drive detection unit (30) in the device or system, and configured to control the opening and closing of the cryogenic ultra-high pressure safety valve through the microcomputer via the drive control unit based on setting information input by a user through the interface.

[0074] Meanwhile, when the valve is open, if the pressure detected through the pressure detection unit (20) is confirmed to be lower than the preset limit pressure corresponding to the set pressure, and if the downward movement of the stem (320) is detected by the drive detection unit (30), it is determined that the cryogenic ultra-high pressure pressure safety valve (10), particularly the pressure spring (340), is in a normal state, and if the pressure detected through the pressure detection unit (20) is confirmed to be lower than the preset limit pressure corresponding to the set pressure, but the downward movement of the stem (320) is not detected by the drive detection unit (30), it is determined that the cryogenic ultra-high pressure pressure safety valve (10), particularly the pressure spring (340), is in an abnormal state (sticking, breakage, or deformation), and at this time, a notification is provided to the drive control unit (50) to move the stem (320) downward through the auxiliary drive means (400). The drive control unit (50) controls the auxiliary drive means (400) so that the auxiliary drive means (400) moves the stem (320) downward.

[0075] As a result, in the above case, even if a problem occurs with the pressure spring (340), the auxiliary driving means (400) is driven so that the valve can be automatically closed when the overpressure is relieved.

[0076] Meanwhile, when the valve is closed, if it is confirmed that the pressure detected through the pressure detection unit (20) is lower than the preset limit pressure corresponding to the set pressure, and if the upward movement of the stem (320) is not detected by the drive detection unit (30), it can be determined that the cryogenic ultra-high pressure safety valve (10), particularly the pressure spring (340), is in a normal state, and if the upward movement of the stem (320) is detected by the drive detection unit (30), it can be determined that the cryogenic ultra-high pressure safety valve (10), particularly the pressure spring (340), is in an abnormal state (breakage, deformation, or decrease in elastic modulus).

[0077] At this time, a notification is provided to the drive control unit (50) to move the stem (320) downward through the auxiliary drive means (400), and the drive control unit (50) controls the auxiliary drive means (400) so that the auxiliary drive means (400) moves the stem (320) downward so that the valve remains closed at a pressure lower than the set pressure.

[0078] Meanwhile, the pressure safety valve monitoring and control system (320) according to an embodiment of the present invention may further include an inlet environment measuring unit (not shown) provided at a position close to the inlet and configured to detect at least one of the temperature, sound, and vibration of the inlet portion, and a discharge environment measuring unit (not shown) provided at a position close to a discharge hole provided to allow the fluid flowing into the valve housing (100) through the inlet in the cryogenic ultra-high pressure pressure safety valve (10) to be discharged to the outside, and configured to detect at least one of the pressure, temperature, sound, and vibration of the discharge hole portion.

[0079] At this time, the monitoring unit (40) may be configured to receive information detected by the pressure sensing unit (20), the driving sensing unit (30), the inflow environment measuring unit, and the discharge environment measuring unit, and to monitor whether a problem has occurred, signs of a problem have occurred, and the remaining lifespan of the cryogenic ultra-high pressure safety valve (10).

[0080] More specifically, the monitoring unit (40) can be configured to monitor the condition of the pressure spring (340) as described above, and in addition to monitoring the condition of the pressure spring (340) as described above, if the pressure sensing unit (20) confirms that the pressure at the inlet part is lower than the limit pressure corresponding to the set pressure, but at least one of the pressure, temperature, sound, and vibration detected by the discharge environment measuring unit is confirmed to be outside the preset normal range corresponding to the state where the valve is closed, then it is determined that at least one of the disc (310) and the seat part, which is the discharge part in contact with the disc (310), has a problem such as wear or damage, generate an alarm for this, and transmit it via wired or wireless communication to an electronic device such as a smartphone, tablet PC, laptop PC, or desktop PC of a user (system administrator or field worker).

[0081] Additionally, the monitoring unit (40) may be configured to generate information indicating a potential problem with the pressure spring (340) and provide it to the user's electronic device by using information detected by the drive detection unit (30) after confirming that the pressure detected by the pressure detection unit (20) is greater than the preset limit pressure corresponding to the set pressure while the valve is closed, (1) whether the stem (320) moves upward, (2) the time from the point of confirmation of the pressure exceeding the limit pressure to the point when the upward movement of the stem (320) begins, and (3) the magnitude of the upward movement of the stem (320), and by confirming the degree of difference compared to the normal state of the pressure spring (340). At this time, the information indicating a potential problem may be, for example, a numerical value or a step.

[0082] For reference, the monitoring unit (40) can be configured to determine whether the valve is in an open or closed state based on the position of the stem (320) using information detected by the drive detection unit (30).

[0083] Additionally, the monitoring unit (40) can be configured to use information collected from the pressure sensing unit (20), the driving sensing unit (30), the inflow environment measuring unit, and the discharge environment measuring unit to extract characteristic data necessary for predicting signs of problem occurrence and remaining lifespan of the cryogenic ultra-high pressure safety valve (10) from the collected information, prepare learning data for signs of problem occurrence and remaining lifespan of the cryogenic ultra-high pressure safety valve (10) according to the extracted characteristic data, and analyze signs of problem occurrence and remaining lifespan of the cryogenic ultra-high pressure safety valve (10) in real time using information detected and transmitted from the pressure sensing unit (20), the driving sensing unit (30), the inflow environment measuring unit, and the discharge environment measuring unit through an artificial intelligence model constructed using the prepared learning data, and transmit the analysis results via wired or wireless communication to electronic devices such as smartphones, tablet PCs, laptop PCs, and desktop PCs of system (320) managers or field workers.

[0084] In such cases, by providing predictive information on signs of potential problems and remaining lifespan, managers or field workers can prepare in advance before problems occur, thereby preventing safety accidents and further enhancing safety.

[0085] At this time, the signs of a problem and the remaining lifespan can be configured to be distinguishable and provided for each part, such as the pressure spring (340) of the ultra-low temperature ultra-high pressure pressure safety valve (10), the disc (310), and the seat surface in contact with the disc (310) of the lower body (110). To this end, the monitoring unit (40) can be configured to use information previously measured and collected from the pressure sensing unit (20), the driving sensing unit (30), the inflow environment measuring unit, and the outflow environment measuring unit, to extract characteristic data, learn data, and artificial intelligence models, and to apply an artificial intelligence model to each part to produce an analysis result.

[0086] At this time, the characteristic data required to predict the signs of problem occurrence and remaining lifespan of the pressure spring (340) may include whether the stem (230) is moving, the direction of movement, the size of movement, and the period between the point of limit pressure detection and the point of start of movement of the stem (230).

[0087] The above-described embodiments are merely exemplary, and various other modified embodiments are possible therefrom for those skilled in the art.

[0088] Therefore, the true technical scope of protection of the present invention should include not only the above embodiments but also other embodiments that are variously modified according to the technical concept of the invention described in the following claims.

[0089] The present invention is applicable to the field of pressure safety valves for cryogenic ultra-high pressure and pressure safety valve monitoring and control systems including the same.

Claims

1. Valve housing; A fluid transfer path formed in the lower part of the valve housing so that fluid is introduced through an inlet at one end and discharged through an outlet at the other end; A main driving means comprising a disc arranged inside the valve housing to open and close the discharge port, a stem coupled to the upper part of the disc, and a pressure spring arranged to provide a pressure force to push the stem downward so that the disc closes the discharge port; and A pressure safety valve for cryogenic ultra-high pressure, characterized by including: an auxiliary driving means provided outside the valve housing, coupled to the upper part of the stem which penetrates the upper part of the valve housing and extends to the outside of the valve housing, so as to provide a pressurizing force to enable the stem to move in both upward and downward directions.

2. In Paragraph 1, The above stem is, A locking part is provided by being formed to protrude outwardly from the upper part, and The above auxiliary driving means is, A cylinder housing in which the locking part of the above-mentioned stem is received internally, and An opening piston disposed below the locking portion of the stem inside the cylinder housing, and A first through hole formed by penetrating the side portion of the cylinder housing to supply air to the lower space of the opening piston inside the cylinder housing, and A closing piston disposed above the stem inside the cylinder housing, and A second through hole formed by penetrating the side portion of the cylinder housing to supply air to the upper space of the closing piston inside the cylinder housing, and A cryogenic ultra-high pressure pressure safety valve characterized by including an elastic member interposed between the opening piston and the closing piston to apply a pushing force in a direction in which the opening piston and the closing piston are separated from each other.

3. In Paragraph 1, The above main driving means is, The above stem protrudes outwardly from the circumference to form a seating portion, and The lower disc, the pressure spring, and the upper disc are configured to be sequentially arranged on the upper side of the above-mentioned seating portion, and A pressure safety valve for cryogenic ultra-high pressure, characterized by being configured to have a pressure sensor interposed between the upper part of the above-mentioned seating portion and the lower part of the above-mentioned lower disc to detect the magnitude of the pressure applied to the disc.

4. A pressure safety valve for cryogenic ultra-high pressure comprising: a valve housing; a fluid transfer path formed at the lower part of the valve housing such that fluid is introduced through an inlet at one end and discharged through an outlet at the other end; a main driving means comprising a disc provided inside the valve housing to open and close the outlet, a stem coupled to the upper part of the disc, and a pressure spring provided to provide a pressurizing force to push the stem downward so that the disc closes the outlet; and an auxiliary driving means provided outside the valve housing, coupled to the upper part of the stem extending to the outside of the valve housing through the upper part of the valve housing, and provided to provide a pressurizing force so that the stem can move in both upward and downward directions. A pressure sensing unit configured to detect fluid pressure at the location where the above-mentioned cryogenic ultra-high pressure pressure safety valve is installed; A drive detection unit that detects the vertical movement of the above stem; A monitoring unit that receives information detected by the pressure sensing unit and the drive sensing unit and monitors whether a problem has occurred in the cryogenic ultra-high pressure pressure safety valve including the pressure spring; and A pressure safety valve monitoring and control system for cryogenic ultra-high pressure, characterized by including: a drive control unit arranged to control the drive of the auxiliary drive means so that the auxiliary drive means is driven when it is confirmed in the monitoring unit that a problem has occurred in the pressure spring.

5. In Paragraph 4, The above monitoring unit is, If it is confirmed that the pressure detected through the pressure sensing unit is greater than or equal to a preset limit pressure corresponding to the set pressure, and if it is detected by the drive sensing unit that the stem has moved upward, the pressure spring is determined to be in a normal state. A pressure safety valve monitoring and control system for cryogenic ultra-high pressure, characterized in that when it is confirmed that the pressure detected by the pressure sensing unit is greater than or equal to a preset limit pressure, but the upward movement of the stem is not detected by the driving sensing unit, the pressure spring is determined to be in an abnormal state and a notification is provided to the driving control unit, thereby controlling the driving of the auxiliary driving means so that the stem is moved upward by the driving control unit to open the valve.

6. In Paragraph 4, The above monitoring unit is, If the pressure detected by the pressure sensing unit is confirmed to be lower than the preset limit pressure corresponding to the set pressure, If the upward movement of the stem is not detected by the above drive detection unit, the pressure spring is determined to be in a normal state, and A pressure safety valve monitoring and control system for cryogenic ultra-high pressure, characterized in that when the drive detection unit detects that the stem has moved upward, the pressure spring is determined to be in an abnormal state and a notification is provided to the drive control unit, thereby controlling the drive of the auxiliary drive means so that the stem is moved downward by the drive control unit to maintain the valve in a closed state.

7. In Paragraph 4, An inflow environment measuring unit provided at a position close to the above-mentioned inlet and configured to detect at least one of the temperature, sound, and vibration of the inlet portion; and The above-described cryogenic ultra-high pressure pressure safety valve further comprises a discharge environment measuring unit positioned near a discharge hole, which is provided to allow fluid flowing into the valve housing through the inlet to be discharged to the outside, and configured to detect at least one of pressure, temperature, sound, and vibration at the discharge hole portion. The above monitoring unit A monitoring and control system for a cryogenic ultra-high pressure pressure safety valve, characterized by being configured to receive information detected by the pressure sensing unit, the driving sensing unit, the inflow environment measuring unit, and the discharge environment measuring unit, and to monitor whether a problem has occurred in the cryogenic ultra-high pressure pressure safety valve.

8. In Paragraph 7, The above monitoring unit is, A monitoring and control system for a cryogenic ultra-high pressure pressure safety valve, characterized by being configured to provide analysis results by analyzing the signs of a problem in the cryogenic ultra-high pressure pressure safety valve in real time using information detected and transmitted from the pressure sensing unit, the driving sensing unit, the inflow environment measuring unit, and the discharge environment measuring unit, using information previously measured and collected from the pressure sensing unit, the driving sensing unit, the inflow environment measuring unit, and the discharge environment measuring unit, thereby utilizing the collected information to extract characteristic data necessary for predicting signs of a problem in the cryogenic ultra-high pressure pressure safety valve, preparing learning data for signs of a problem in the cryogenic ultra-high pressure pressure safety valve according to the extracted characteristic data, and using an artificial intelligence model constructed using the prepared learning data to analyze the signs of a problem in the cryogenic ultra-high pressure pressure safety valve in real time using information detected and transmitted from the pressure sensing unit, the driving sensing unit, the inflow environment measuring unit, and the discharge environment measuring unit.

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