Safety valve unit using a purge valve with a two-stage pneumatic structure

Abstract

The present invention provides a safety valve unit using a purge valve with a two-stage pneumatic structure to prevent fuel leakage. [Solution] The invention includes a main body 100, an air inlet 150 formed on one side of the main body, an input section 200 provided on one side of the main body, having a flow path formed through which supplied fuel and compressed air flow, and equipped with a first ball valve for opening and closing the flow path, a branch section connected to the flow path and interlocking with an outlet for supplying ammonia in the fuel, a block section connected to the flow path of the branch section and equipped with a number of discharge control valves corresponding to the number of outlets for opening and closing the flow path, a purge valve section 600 connecting the input section and the block section, coupled between the input section and the flow path, and controlling the pressure of the fuel flowing in from the input section and the pressure of the compressed air flowing in from the flow path, and a control section that discharges the fuel and compressed air through the outlet and adjusts the pressure of the flow path.

Description

Technical Field

[0001] The present invention relates to a safety valve using a purge valve having a two-stage pneumatic structure, and more particularly to a safety valve unit using a purge valve having a two-stage pneumatic structure that applies the purge valve having the two-stage pneumatic structure to precisely adjust fluid pressure and control the flow of high-pressure fuel.

Background Art

[0002] Generally, in industrial environments using fuel, it is essential to precisely control fuel flow, adjust pressure, and safely manage the discharge process. In particular, fuels such as ammonia have high reactivity, so if pressure fluctuations that may occur during the supply process cannot be effectively controlled, there is a high risk of leading to serious accidents such as fire and explosion. Therefore, there is a need for a technology that can stably maintain fuel pressure, safely discharge fuel through a discharge port when necessary, and effectively remove residual gas in the system. Conventional safety valve units generally adopt a method of controlling the flow of high-pressure fuel by applying a single hydraulic structure. Although the single hydraulic structure can be operated with a relatively simple design, it is sensitive to abrupt pressure fluctuations of hydraulic oil and has limitations in fine adjustment of flow rate. In particular, when the supply of hydraulic oil is not constant or the pressure fluctuates abruptly due to external factors, the existing single hydraulic valve reacts excessively sensitively, and the problem of pressure instability may cause smooth fuel supply.

[0003] In addition, in conventional valve units, a part of gas often remains inside the system even after the fuel supply is completed. Such residual fuel accumulates over time, and when the accumulated fuel reacts with the external environment, it may increase the risk of explosion. Generally, a separate discharge system is additionally installed to remove residual fuel, which increases the complexity of the system and causes the problem of increased maintenance costs. Therefore, there is a need for a technology that can safely discharge fuel from the discharge port, reduce unnecessary fuel waste, and effectively circulate residual fuel.

[0004] Conventional safety valve units often lack the ability to measure flow rates in real time or to automatically adjust them. While precise control of gas flow is crucial during the fuel supply process, conventional systems operate on an open / close mechanism, which can lead to inconsistent fuel flow or the discharge of excess fuel.

[0005] This leads to problems such as reduced fuel efficiency, increased unnecessary fuel consumption, and higher operating costs. The durability of the safety valve unit also plays a significant role. Valves using a single hydraulic structure are more susceptible to internal component wear or damage over time, and their performance is likely to deteriorate in environments with drastic pressure changes. In particular, in industrial environments, where the flow of hydraulic fluid is constantly changing, valve maintenance must be easy, and a highly durable design is required to ensure a long service life.

[0006] To solve these problems, the present invention provides a safety valve unit that employs a purge valve having a two-stage pneumatic structure. The purge valve section of the present invention consists of an inlet body, a pressurizing body, a spring, and a two-stage pressurizing disc, and is designed to allow for more precise adjustment of the fuel inflow rate. Furthermore, the block section includes a flow meter, allowing for real-time monitoring of the discharged fuel flow rate, and the control section employs a control valve, enabling automatic adjustment of the amount of ammonia supplied to the outlet. This makes it possible to stably control pressure fluctuations that may occur during the fuel supply process, optimize the fuel flow, and prevent unnecessary fuel waste.

[0007] The valve system of the present invention includes a function to recirculate any remaining fuel that has not been discharged back to the input section, thereby preventing fuel stagnation within the system and minimizing the risk of explosion. In conventional systems, there is a high possibility that some fuel will remain inside the valve even after fuel discharge is complete, but in the present invention, the gas is sent back to the input section via the circulation section for safe use. This ensures a stable fuel supply while reducing unnecessary fuel discharge, thereby maximizing the efficiency of fuel use.

[0008] The purge valve employing the two-stage pneumatic structure of the present invention allows for more precise pressure adjustment than conventional single-hydraulic valves and can stably respond to rapid pressure fluctuations.

[0009] This allows for effective adjustment of various environmental variables that occur during the fuel supply process, ensuring that the internal pressure of the system remains constant. Furthermore, the valve unit of the present invention utilizes high-strength materials to improve durability and employs a modular design for easy maintenance, enabling long-term stable use.

[0010] The safety valve unit of the present invention offers more precise control than conventional valve units and can automatically adjust the flow of fuel and compressed air, thereby ensuring both the safety and efficiency of the gas supply. This technology provides a more reliable fuel supply system in industrial settings, minimizing the risk of leaks and explosions and creating a safer working environment. [Prior art documents] [Patent Documents]

[0011] [Patent Document 1] Korean Registered Patent Publication No. 10-2608687 (November 28, 2023) [Overview of the project] [Problems that the invention aims to solve]

[0012] The present invention was devised to solve the aforementioned problems, and its objective is to provide a safety valve unit using a purge valve with a two-stage pneumatic structure that precisely adjusts the fluid pressure by applying a purge valve with a two-stage pneumatic structure to prevent fuel leakage.

[0013] The object of the present invention is not limited to the object described above, and other object not described above will be clearly understood by a person with ordinary skill in the art of the present invention from the following description. [Means for solving the problem]

[0014] To achieve the above objective, the present invention is characterized by including a main body; an air inlet formed on one side of the main body; an input section provided on one side of the main body, having a flow path formed through which supplied fuel and compressed air flow, and equipped with a first ball valve for opening and closing the flow path; a branch section connected to the flow path and interlocking with an outlet for supplying ammonia in the fuel; a block section connected to the flow path of the branch section and equipped with a number of discharge control valves corresponding to the number of outlets for opening and closing the flow path; a circulation section connecting the input section and the block section and circulating the fuel and compressed air remaining in the block section back to the input section; a purge valve section coupled between the input section and the flow path and controlling the pressure of the fuel flowing in from the input section and the pressure of the compressed air flowing in from the flow path; and a control section that discharges the fuel and compressed air through the outlet and adjusts the pressure of the flow path.

[0015] Furthermore, the purge valve section is characterized by including an inlet body into which fuel flows, a pressurizing body connected to an air pressure line, a spring built between the inlet body and the pressurizing body, and a pressurizing disc formed in a two-stage structure at the lower part of the pressurizing body.

[0016] Furthermore, the control unit is characterized by circulating the fuel and compressed air flowing inside the circulation unit to the input unit in accordance with the internal pressure of the block unit.

[0017] Furthermore, the control unit is characterized by including a control valve that adjusts the opening of the flow path to control the amount of ammonia supplied to the discharge port. [Effects of the Invention]

[0018] The safety valve system of the present invention is designed to precisely control the flow of fuel and compressed air, and offers improved pressure regulation performance compared to conventional valves using a single hydraulic structure. Specifically, the main body, input section, branch section, block section, circulation section, and purge valve section operate organically to supply fuel and compressed air at a constant pressure, and maintain a stable flow even during the gas discharge process.

[0019] Furthermore, the purge valve section is designed with a two-stage pneumatic structure, allowing for more stable adjustment of fuel and compressed air pressure. While conventional single-hydraulic valves have limited pressure adjustment capabilities, the purge valve section of the present invention, composed of an inlet body, a pressurizing body, a spring, and a pressurizing disc, provides the advantage of stable pressure adjustment even in various environments.

[0020] Furthermore, the control valve of the present invention adjusts the opening of the fuel flowing to the discharge port in real time, thereby maintaining the optimal supply amount. This provides the effect of preventing fuel waste, reducing unnecessary fuel emissions, and ensuring stable fuel usage.

[0021] Furthermore, the block unit, including the flow meter, is designed to measure the amount of gas being discharged in real time and automatically adjust the flow rate in cooperation with the control unit as needed. This prevents excessive fuel discharge during the fuel supply process, maximizes the efficiency of fuel use, and ensures a constant supply. [Brief explanation of the drawing]

[0022] [Figure 1] This is a perspective view showing a safety valve unit using a purge valve having a two-stage pneumatic structure according to a preferred embodiment of the present invention. [Figure 2] It is a cross-sectional view showing a purge valve portion according to a preferred embodiment of the present invention. [Figure 3] It is a side view showing a safety valve unit using a purge valve having a two-stage pneumatic structure according to an embodiment of the present invention. [Figure 4] It is another side view showing a safety valve unit using a purge valve having a two-stage pneumatic structure according to a preferred embodiment of the present invention. [Figure 5] It is a cross-sectional view showing a conventional purge valve.

Mode for Carrying Out the Invention

[0023] The advantages and features of the present invention, and methods for achieving them will become apparent with reference to the embodiments described in detail below in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but can be implemented in various different forms. The present embodiments are merely provided to complete the disclosure of the present invention and to fully inform those having ordinary skill in the art to which the present invention pertains of the scope of the invention, and the present invention is only defined by the scope of the claims.

[0024] Hereinafter, specific contents for implementing the present invention will be described in detail with reference to the accompanying drawings. Regardless of the drawings, the same reference numerals refer to the same components, and "and / or" includes each and all combinations of one or more of the recited items.

[0025] The terms "first", "second", and the like are used herein to describe various components, but these components are not limited by these terms. These terms are only used for the purpose of distinguishing one component from other components. Therefore, it goes without saying that the first component described below may be the second component within the technical idea of the present invention.

[0026] The terms used herein are for illustrative purposes only and do not limit the invention. In this specification, singular terms include plural terms unless otherwise specified. The terms “comprises” and / or “comprising” as used herein do not preclude the existence or addition of one or more other components in addition to those described.

[0027] Unless otherwise defined, all terms used herein (including technical and scientific terms) should be used in a sense that is commonly understood by those with ordinary skill in the art to which the present invention pertains. Furthermore, terms defined in commonly used dictionaries should not be interpreted ideally or excessively unless explicitly and specifically defined otherwise.

[0028] Preferred embodiments of the present invention will be described in detail below with reference to the attached drawings.

[0029] Figure 1 is a perspective view showing a safety valve unit using a purge valve having a two-stage pneumatic structure according to a preferred embodiment of the present invention; Figure 2 is a cross-sectional view showing the purge valve section according to a preferred embodiment of the present invention; Figure 3 is a side view showing a safety valve unit using a purge valve having a two-stage pneumatic structure according to a preferred embodiment of the present invention; Figure 4 is another side view showing a safety valve unit using a purge valve having a two-stage pneumatic structure according to one embodiment of the present invention; and Figure 5 is a cross-sectional view showing a conventional purge valve.

[0030] As shown in Figures 1 to 5, the safety valve unit using the purge valve having a two-stage pneumatic structure according to the present invention comprises a main body 100, an air inlet 150, an input 200, a branch 300, a block 400, a circulation 450, a control unit 500, and a purge valve 600.

[0031] First, the main body portion 100 is a key component forming the overall structure of the safety valve system of the present invention, and includes a flow path through which fuel and compressed air can flow.

[0032] The main body 100 is made of a high-strength, heat-resistant material and is designed to withstand gas and air pressure changes, possess corrosion resistance, and enable stable operation over a long period of time.

[0033] The main body 100 is made of a highly durable metal or composite material so that it can operate stably even in a high-pressure environment, and is equipped with a sealed structure to prevent gas and fuel leakage. The main body 100 also includes an air inlet 150, an input section 200, a branch section 300, a block section 400, and a control section 500, and each component is designed to operate smoothly.

[0034] Furthermore, the air inlet 150 plays a role in introducing compressed air into the system and working in conjunction with the input 200 to mix it with the fuel. The air inlet 150 is designed to supply air at a constant flow rate and may include a pressure regulator to prevent excessive pressure rise.

[0035] Furthermore, the air inlet 150 is connected to an external compressed air supply source and is configured to facilitate pressure adjustment at the input 200.

[0036] Next, the input unit 200 is the main component into which the fuel and compressed air are mixed, and includes a first ball valve that opens and closes the flow path, and is connected to the air inlet unit 150. The input unit 200 works in conjunction with a pressure sensor 210 to maintain a constant pressure of the incoming fuel and air, and serves to prevent excessive fuel inflow.

[0037] The input unit 200 is designed so that compressed air supplied from the air inlet 150 and fuel are mixed in a constant ratio, thereby enabling a stable fuel supply. The input unit 200 may include a multi-stage pressure adjustment structure internally to precisely adjust the fuel flow, thereby maintaining a constant pressure even if pressure fluctuations occur during fuel supply.

[0038] The input unit 200 is directly connected to the purge valve unit 600 and plays a role in adjusting the pressure of the fuel and compressed air flowing in from the purge valve unit 600. The inlet body 610 of the purge valve unit 600 is coupled to the input unit 200, and the flow of fuel and air is smoothly adjusted via the pressurizing body 620 and pressurizing disc 640.

[0039] As a result, the input unit 200 acts to transmit fuel to the block unit 400 at a constant pressure, and, if necessary, works in conjunction with the circulation unit 450 to recycle residual fuel.

[0040] The input unit 200 works in conjunction with the pressure sensor 210 to sense pressure in real time and adjust the amount of fuel and air flowing in. The pressure sensor 210 is connected to the control unit 500 and performs the function of automatically adjusting the opening degree of the discharge control valve 410 based on the sensed data. As a result, the input unit 200 prevents system overload due to excessive fuel inflow and enables a constant fuel supply.

[0041] The input unit 200 is made of a highly durable metal or high-strength composite material to ensure stable operation even under external shocks and in high-temperature environments, and may be internally coated with a low-friction coating for smooth fluid flow. Furthermore, the input unit 200 is designed with a separable structure for easy maintenance and to allow for easy replacement of any damaged components.

[0042] The input unit 200 works in conjunction with the block unit 400 and the discharge control valve 410 to adjust the discharge path of the incoming fuel. Depending on the flow rate set in the block unit 400, fuel is supplied to the first outlet port 420 or the second outlet port 430, and can be returned to the input unit 200 via the circulation unit 450 as needed. This allows the input unit 200 to minimize fuel waste and maintain an optimal fuel mixture ratio.

[0043] The input unit 200 can be designed to be remotely monitored and operated in conjunction with a management system, thereby enabling the user or an automated AI system to adjust the fuel supply status in real time. This maximizes fuel efficiency and allows for immediate response in the event of unexpected pressure fluctuations.

[0044] Next, the branching section 300 is a component that plays a role in distributing the fuel and compressed air flowing in from the input section 200 to the block section 400, and includes the function of adjusting the flow rate and setting the optimal supply path. The branching section 300 is located between the input section 200 and the block section 400 and is designed to configure a flow path so that the fuel and compressed air are transmitted in a uniformly mixed state, and to be able to adjust the fluid flow as needed.

[0045] The branching section 300 optimizes the flow characteristics of the fuel as it flows from the input section 200 to the block section 400, thereby improving the efficiency of fuel supply.

[0046] The branch section 300 includes multiple flow paths internally, enabling it to automatically adjust the fluid flow when specific flow rate adjustments are required, thereby allowing for a constant flow rate supply while maintaining the fuel-to-compressed air ratio.

[0047] The branching section 300 works in conjunction with the purge valve section 600 to adjust the pressure balance between fuel and compressed air, and, if necessary, connects directly to the block section 400 or resupplies fuel to the input section 200 via the circulation section 450. The branching section 300 is connected to the control unit 500 and can automatically adjust the optimal fuel supply path, performing the function of distributing fuel according to the flow rate conditions set in the block section 400.

[0048] The branch section 300 is linked with the discharge control valve 410, the first outlet port 420, and the second outlet port 430 in the block section 400 to efficiently adjust the fuel flow. The branch section 300 is configured to form a main fuel supply path via the first outlet port 420 and to discharge additional fuel via the second outlet port 430 as needed.

[0049] The branching section 300 is connected to the circulation section 450 to prevent unnecessary fuel discharge and to recirculate it back to the input section 200, thereby reducing fuel waste. This allows the branching section 300 to reuse unused fuel within the system, maximizing the efficiency of fuel use.

[0050] The branch section 300 is made of a highly durable metal or high-strength composite material so that it can operate stably in various environments, and the internal flow path may be treated with a special coating to minimize frictional resistance. This allows fuel and compressed air to move smoothly, reduces wear on internal components, and extends the life of the system.

[0051] The branching section 300 can be designed to be remotely monitored and operated in conjunction with a management system, thereby enabling the user or an automated AI system to adjust the fuel supply status in real time. This maximizes fuel utilization efficiency and allows for immediate response in the event of unexpected pressure fluctuations.

[0052] Next, the block section 400 is a key component that controls the flow of fuel and compressed air supplied from the branch section 300 and adjusts the flow rate to the discharge port. The block section 400 includes a function to adjust the fuel flow rate in real time and automatically adjust the discharge rate as needed, and operates in conjunction with the discharge control valve 410, the first outlet port 420, the second outlet port 430, and the circulation section 450.

[0053] The block section 400 includes a discharge control valve 410 that controls the flow rate to the discharge port, ensuring that the fuel supplied from the input section 200 and the branch section 300 flows at a constant pressure and flow rate. The discharge control valve 410 is connected to the control unit 500 and is designed to allow real-time flow rate adjustment, ensuring that the fuel is supplied at a constant rate.

[0054] The block section 400 functions to distribute the fuel flowing through the discharge control valve 410 to the first outlet port 420 and the second outlet port 430. The first outlet port 420 is used as the main discharge path and forms the path through which the fuel is ultimately discharged. The second outlet port 430 provides an additional discharge path as needed, allowing for the safe discharge of excess fuel in case of accumulation.

[0055] The block section 400 is connected to the circulation section 450 and is designed to supply unexhausted gas back to the input section 200. The circulation section 450 prevents unexhausted fuel from stagnating within the system, thereby reducing fuel waste and minimizing the risk of explosion. This allows the block section 400 to maximize fuel usage efficiency and prevent unnecessary fuel discharge.

[0056] The block unit 400 is designed to measure flow rates in real time and includes a flow meter to accurately monitor the flow of fuel and compressed air discharged to the outlet. The flow meter includes a function that works in conjunction with the control unit 500 to continuously analyze the fuel flow and automatically adjust it so that the discharge flow rate is maintained at an optimal level. This allows the block unit 400 to optimize fuel usage and minimize energy consumption.

[0057] The block section 400 is made of a highly durable metal or composite material so that it can operate stably even in external environments, and a low-friction coating can be applied to the interior to maintain a smooth gas flow. This ensures that fuel and compressed air flow at a constant speed, minimizing wear on components and extending the system's lifespan.

[0058] The block unit 400 is connected to the control unit 500 and can be operated remotely, enabling real-time monitoring of the fuel supply status. The control unit 500 analyzes the flow rate data measured by the block unit 400 and adjusts the discharge control valve 410 as needed to maintain an optimal fuel supply status.

[0059] Next, the control unit 500 is a core component that comprehensively adjusts the overall fuel and compressed air flow of the present invention, and works in conjunction with the input unit 200, branch unit 300, block unit 400, and purge valve unit 600 to automatically control the fuel supply and discharge. The control unit 500 senses the fuel flow rate in real time, adjusts the opening of the discharge control valve 410 so that the fuel flows at a constant pressure and flow rate, and activates the circulation unit 450 as needed to recirculate any undischarged fuel back to the input unit 200.

[0060] The control unit 500 is designed to sense the pressure and flow rate of fuel and compressed air flowing into the input unit 200 in real time via the pressure sensor 210 and the flow meter of the block unit 400, and to adjust the operation of the discharge control valve 410 and the purge valve unit 600 based on the data. This allows the control unit 500 to prevent excessive fuel inflow, maintain a constant fuel supply, and take immediate action in the event of pressure fluctuations.

[0061] The control unit 500 is configured to adjust the opening degree of the discharge control valve 410 in real time in order to adjust the amount of gas supplied to the discharge port. If the discharge amount is excessive or insufficient, the control unit 500 automatically adjusts the valve opening degree to maintain the optimal discharge amount, thereby maximizing the efficiency of fuel supply. The control unit 500 also controls the opening and closing states of the first outlet port 420 and the second outlet port 430 of the block unit 400 to ensure that fuel flows smoothly.

[0062] The control unit 500 works in conjunction with the circulation unit 450 to optimize fuel use, preventing unnecessary fuel discharge and, if necessary, recirculating residual gas back to the input unit 200 to reduce fuel waste. This allows fuel to be continuously circulated and used, maximizing fuel supply efficiency, reducing fuel waste, and minimizing the risk of explosion due to gas accumulation.

[0063] The control unit 500 controls the operation of the purge valve unit 600 to maintain the fuel and compressed air pressures at a constant level. It monitors the operating status of the inlet body 610, pressurizing body 620, spring 630, and pressurizing disc 640 of the purge valve unit 600, and automatically adjusts if a pressure change is detected to ensure a stable fuel supply. In this way, the control unit 500 minimizes pressure fluctuations that occur during the fuel supply process, enabling stable system operation.

[0064] The control unit 500 includes remote monitoring and automation functions, enabling real-time monitoring and control of the fuel supply status in conjunction with a user or an AI-based automation system. The fuel supply status can be remotely monitored via a network, allowing for remote adjustment of valve openings or activation of circulation modes as needed. This enables a rapid response in the event of unexpected system overload or pressure fluctuations.

[0065] The control unit 500 includes an automatic diagnostic function to continuously check the status of each component in the system, output a warning signal if an abnormality is detected, and automatically take appropriate action. The control unit 500 is designed to respond immediately and resolve problems if pressure changes exceed a certain range or flow rates fall outside the normal range.

[0066] The control unit 500 is designed to ensure the stability of the fuel supply and to automatically adjust the flow of fuel and compressed air, thereby improving the safety of the system and maximizing the efficiency of fuel use. As a result, the system of the present invention enables more precise fuel control than conventional fuel supply methods, preventing fuel waste, reducing the risk of gas explosions, and maximizing the stability of the fuel supply.

[0067] Next, the purge valve section 600 is a core component that precisely adjusts the pressure of the fuel and compressed air flowing in from the input section 200, playing a role in maintaining a stable fuel flow and preventing excessive pressure changes. The purge valve section 600 consists of an inlet body 610, a pressurizing body 620, a spring 630, and a pressurizing disc 640, and includes a two-stage pneumatic structure for controlling the flow of fuel and compressed air.

[0068] The purge valve section 600 is designed to receive fuel supplied from the input section 200 via the inlet body 610, and to regulate the pressure as the fuel passes through. The inlet body 610 is made of a highly durable alloy or composite material and may be treated with a low-friction coating to maintain a smooth fuel flow inside.

[0069] Furthermore, the inlet body 610 is designed so that fuel can move to the pressurized body 620 at a constant speed, and so that it can be automatically adjusted if an excessive flow rate occurs.

[0070] The pressurized body 620 is located in the center of the purge valve section 600 and plays a role in regulating the flow of fuel and compressed air. The pressurized body 620 works together with the pressurized disc 640 to maintain the fuel pressure within a certain range and allows for automatic adjustment of the valve opening by adjusting the position of the pressurized disc 640 when a pressure change is detected. This prevents excessive fuel inflow and ensures a stable supply under constant pressure.

[0071] The spring 630 is located inside the pressurizing body 620 and assists the operation of the pressurizing disc 640, allowing for the regulation of the flow of fuel and compressed air. The spring 630 adjusts its elastic force in response to the fuel pressure to automatically adjust the valve opening, thereby preventing sudden changes in fuel pressure.

[0072] Furthermore, the spring 630 is designed to maintain a constant pressure and is optimized to ensure smooth fuel supply.

[0073] The pressurizing disc 640 is a core component that adjusts the pressure in the purge valve section 600, and plays a role in adjusting and maintaining the pressure of the fuel and compressed air to an optimal state. The pressurizing disc 640 is formed in a two-stage structure and is designed to be adjustable in stages according to the pressure difference between the incoming fuel and compressed air. This effectively buffers pressure changes that may occur during the fuel supply process, enabling a uniform fuel supply.

[0074] The purge valve unit 600 is designed to operate in conjunction with the control unit 500 and to automatically adjust the fuel supply amount as needed. The control unit 500 monitors the pressure state of the purge valve unit 600 in real time and adjusts the fuel supply to maintain a constant state. This ensures that fuel is transmitted to the block unit 400 at a constant pressure and flow rate, minimizing unstable pressure changes that may occur during the fuel supply process.

[0075] The purge valve section 600 is made of a highly durable material so that it can operate stably even in external environments, and is designed not to deform even at high temperatures and pressures.

[0076] Furthermore, it is designed with a modular structure for easy maintenance, allowing for easy replacement of specific parts if they are damaged. This enables the purge valve unit 600 to operate stably over long periods and effectively adjust for various variables that may occur during the fuel supply process.

[0077] The purge valve section 600 minimizes pressure fluctuations that occur during the fuel supply process and optimizes the pressure of fuel and compressed air to maintain a constant flow rate.

[0078] This maximizes fuel utilization efficiency and prevents potential safety accidents that may occur during the fuel supply process. In addition, the purge valve 600 prevents unnecessary fuel discharge and ensures a stable fuel supply.

[0079] The purge valve section 600 of the present invention allows for more precise pressure adjustment than conventional single-pneumatic valves and is designed to enhance fuel supply stability by applying a two-stage pneumatic structure. Furthermore, by including real-time monitoring and automatic adjustment functions, the fuel supply status is continuously monitored and automatically adjusted as needed, thereby ensuring fuel supply stability. This improves the reliability of the fuel supply system and maximizes fuel usage efficiency.

[0080] Although embodiments of the present invention have been described above with reference to the attached drawings, those with ordinary skill in the art to which the present invention pertains will understand that the present invention can be implemented in other specific forms without altering its technical idea or essential features. Therefore, the embodiments described above should be understood in all respects as illustrative and not limiting. [Explanation of symbols]

[0081] 1000 Safety valve unit using a purge valve with a two-stage pneumatic structure 100 Body part 150 Air inlet 200 Input section 210 Pressure Sensor 300 Branch 400 Block Section 410 Discharge control valve 420 First Outlet Port 430 Second Outlet Port 450 Circulation section 500 Control Unit 600 Purge valve section 610 Inlet Body 620 Compression Body 630 spring 640 Pressure Disc

Claims

1. The main body and An air inlet formed on one side of the main body, An input section is provided on one side of the main body, having a flow path formed through which supplied fuel and compressed air flow, and equipped with a first ball valve for opening and closing the flow path, A branch section connected to the aforementioned flow path and linked to an outlet that supplies ammonia from the fuel, A block section connected to the flow path of the branch section, and equipped with a number of discharge control valves corresponding to the number of outlets for opening and closing the flow path, A circulation unit connects the input unit and the block unit, and circulates the fuel and compressed air remaining in the block unit back to the input unit. A purge valve unit is coupled between the input unit and the flow path and controls the pressure of the gaseous fuel flowing in from the input unit and the pressure of the compressed air flowing in from the flow path. A safety valve unit using a purge valve having a two-stage pneumatic structure, characterized by including a control unit that discharges the fuel and compressed air through the outlet and adjusts the pressure in the flow path.

2. The purge valve section is, The fuel inlet body, A pressurized body connected to the air pressure line, A spring is built between the inlet body and the pressurizing body, A safety valve unit using a purge valve having a two-stage pneumatic structure according to claim 1, characterized in that it includes a pressurizing disc formed in a two-stage structure at the lower part of the pressurizing body.

3. The safety valve unit using a purge valve having a two-stage pneumatic structure according to claim 1, characterized in that the control unit includes a control valve that adjusts the opening of the flow path to control the amount of ammonia supplied to the discharge port.

4. The safety valve unit using a purge valve having a two-stage pneumatic structure according to claim 1, characterized in that the block portion includes a flow meter for measuring the flow rate of ammonia.

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