A plug cover and a control monitoring system comprising the same

Abstract

The utility model provides a kind of plug cover and control monitoring system comprising it, it is related to air conditioning technical field, solve the technical problem that plug cover sealing performance is poor.The plug cover includes plugging in the air inlet air bag body, air bag body is sequentially provided with first gas cavity and second gas cavity from inside to outside;First gas cavity is plugged in the inner chamber of air inlet, to form primary sealing structure;Second gas cavity is wrapped in the outside of air inlet, to form secondary sealing structure.The utility model realizes inside and outside double sealing by double-layer gas cavity structure, effectively improves plugging reliability;First gas cavity is tightly combined with the inner wall of air inlet after inflation to form primary sealing, second gas cavity expands tightly after inflation external interface area, form secondary sealing compensation, adapt to deformation and thermal expansion and contraction under different working conditions.

Description

Technical Field

[0001] This utility model relates to the field of air conditioning technology, and in particular to a plug and a control and monitoring system containing the plug. Background Technology

[0002] In aircraft air conditioning systems, the heat exchanger bleed air inlet is a critical gas flow component, and its sealing performance affects the safety and efficiency of aircraft air conditioning operation. Traditional plugs and caps mostly use mechanical seals, which have problems such as incomplete sealing, difficulty in real-time monitoring of sealing status, and poor environmental adaptability. Especially in high-temperature environments, traditional plugs and caps are prone to leakage, aging, and damage, leading to system failure. In addition, existing plugs and caps lack real-time monitoring capabilities for key parameters such as gas temperature, pressure, and flow rate, making it impossible to detect potential risks in a timely manner.

[0003] Therefore, there is an urgent need for an intelligent plug cap that has good sealing ability, good adaptability, and can be monitored and controlled in real time. Utility Model Content

[0004] The purpose of this invention is to provide a plug and a control and monitoring system therein, so as to solve the technical problem of poor sealing performance of the plug in the prior art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: The present invention provides a plug cover, comprising an airbag body that seals the air intake inlet, wherein a first air chamber and a second air chamber are arranged sequentially from the inside to the outside of the airbag body; the first air chamber seals the inner cavity of the air intake inlet to form a primary sealing structure; the second air chamber wraps around the outside of the air intake inlet to form a secondary sealing structure.

[0006] The plug of this utility model achieves double sealing inside and outside through a double-layer air cavity structure, which effectively improves the sealing reliability. After being filled with air, the first air cavity fits tightly with the inner wall of the air inlet to form a primary seal. After being filled with air, the second air cavity expands and fits tightly with the external interface area to form a secondary seal compensation, which can adapt to deformation and thermal expansion and contraction under different working conditions.

[0007] As a further improvement of this utility model, the end of the second air cavity protrudes beyond the end of the first air cavity to form an outer wrapping skirt.

[0008] This invention designs the end of the second air chamber to protrude beyond the end of the first air chamber, thus forming an outer skirt structure. This effectively enhances the sealing coverage of the external interface area of ​​the air inlet, improving overall sealing stability. After inflation, this outer skirt structure applies pressure evenly to the root of the interface, reducing stress concentration and preventing seal failure due to vibration or temperature changes. It also facilitates quick installation and disassembly, making it suitable for the complex and variable operating environment of aircraft air conditioning systems. Furthermore, the airbag body is made of a high-temperature resistant and anti-aging composite elastic material, enabling stable operation in environments ranging from -50℃ to 200℃, ensuring long-term sealing performance. The first and second air chambers are connected to an external control unit via independent air supply channels, allowing for staged inflation and deflation control to adapt to sealing requirements under different pressure conditions.

[0009] As a further improvement of this utility model, the outer wall of the first air cavity and the outer wall of the second air cavity are partly an integral structure and partly a separate structure to form an inner wrapping skirt.

[0010] This invention combines an integrated and separate structure for the outer walls of the first and second air chambers. This design restricts the expansion of the inner air chamber to a localized rigid area, forming an internally encapsulated anchoring structure that enhances the pressure resistance of the primary seal. The separate sections allow the secondary air chambers to expand independently, improving the fit of the outer seal. This design effectively balances sealing strength and adaptability, maintaining a reliable seal even with minor deformations or surface unevenness at the air inlet. Furthermore, the integrated and separate structure facilitates molding, reducing manufacturing costs and improving product consistency. It is also less prone to fatigue cracking during frequent disassembly and reassembly, significantly extending service life. The rounded edges of each air chamber prevent stress concentration, further enhancing structural durability.

[0011] As a further improvement of this utility model, a mating groove is provided on the outer wall of the second air cavity corresponding to the outer edge of the inner wrapping skirt.

[0012] The second air chamber of this invention has a mating groove on its outer wall corresponding to the outer edge of the inner wrapping skirt, and a mating protrusion on its corresponding position at the air inlet. During installation, the mating protrusion at the air inlet can be inserted into the mating groove. When the second air chamber is inflated, its inner wall surface fits snugly against the outer edge of the inner wrapping skirt, effectively suppressing radial deformation and preventing displacement or detachment of the sealing structure under the impact of high-pressure airflow. The pre-positioning design of the mating groove and protrusion also facilitates installation alignment and improves assembly efficiency. After inflation, the second air chamber and the inner wrapping skirt work together to form a bidirectional constraint, further enhancing the reliability of the interface seal.

[0013] As a further improvement of this utility model, the mating groove extends towards the first air cavity and forms a 90-degree angle with the outer wall of the first air cavity.

[0014] As a further improvement of this utility model, it also includes a first air valve and a second air valve disposed on the airbag body and respectively communicating with the first air chamber and the second air chamber.

[0015] This invention achieves independent control of the two air chambers by setting a first air valve and a second air valve, which facilitates adjustment of inflation timing and pressure parameters according to actual working conditions, improving the accuracy and adaptability of the sealing response. The air valves adopt a self-locking structure design to ensure a stable airtight state even under vibration, preventing leakage due to loosening. The air valve communicating with the first air chamber is located on the closed end face of the airbag body, and the air valve communicating with the second air chamber is located on the side wall of the airbag body.

[0016] As a further improvement of this utility model, it also includes a first sensor and a second sensor that are respectively connected to the first air chamber and the second air chamber.

[0017] Real-time parameters within the first and second air chambers are acquired using first and second sensors.

[0018] As a further improvement of this utility model, the first sensor and the second sensor are temperature sensors.

[0019] By acquiring the temperature inside the air chamber in real time through temperature sensors and monitoring the pressure fluctuation trend inside the air chamber in conjunction with temperature changes, dynamic prediction of the sealing status can be achieved.

[0020] As a further improvement of this utility model, the airbag body is made of multi-layer composite material.

[0021] This invention's plug cap, through its inflatable bladder structure, achieves a tight and robust seal, adapting to the high temperatures and other environments encountered during aircraft operation. It achieves a highly reliable seal, and through independent dual-chamber control and sensor-based feedback, it enables real-time monitoring and dynamic compensation of the sealing status. It automatically adjusts internal pressure under temperature changes or vibration conditions, ensuring long-term sealing stability and effectively preventing leakage risks caused by pressure imbalance. This enhances the system's adaptability and safety in complex environments and reduces maintenance costs. The use of multi-layered composite materials not only improves the heat resistance and fatigue resistance of the bladder body but also maintains good elasticity under extreme temperature conditions, preventing material embrittlement or excessive expansion that could lead to seal failure, further ensuring the plug cap's reliability and durability during long-term service.

[0022] This utility model provides a control and monitoring system, including an air supply source, an inflation unit, an inflation unit, and a plug; wherein: the air supply source is connected to both the first air chamber and the second air chamber of the inflation unit; and the inflation unit is connected to both the first air chamber and the second air chamber.

[0023] As a further improvement of this utility model, the inflation unit includes a first three-way pipe, a first inflation pipeline, a second inflation pipeline, a first control valve, a second control valve, a pressure sensor, and a flow meter; wherein: The first port of the first three-way pipe is connected to the air supply source; the second port is connected to the second air chamber through the first inflation pipe; and the third port is connected to the first air chamber through the second inflation pipe. The pressure sensor and the flow meter are respectively installed on the first inflation pipeline and the second inflation pipeline; The first control valve is installed on the first inflation line; The second control valve is installed on the second inflation line.

[0024] As a further improvement of this utility model, the venting unit includes a second three-way valve, a third three-way valve, a third control valve, and a fourth control valve; wherein: The first port of the second three-way valve is connected to the outlet of the first control valve, the second port is connected to the inlet of the pressure sensor, and the third port is connected to the pipeline of the third control valve. The first port of the third three-way valve is connected to the outlet of the second control valve, the second port is connected to the inlet of the pressure sensor, and the third port is connected to the pipeline of the fourth control valve.

[0025] This utility model's control and monitoring system includes a plug cap, an air supply source, an inflation unit, and an inflation unit. The inflation unit includes gas performance detection (pressure, temperature, flow) sensors and a control and monitoring system (air supply source, electric control valve, three-way valve), etc. By setting up sensors for gas pressure, temperature, and flow, the plug cap has the ability to perform real-time inflation and sealing, deflation and disassembly, real-time monitoring and control of gas performance indicators, and abnormal warning functions. It also provides abnormal feedback and system control based on relevant sensor parameters, achieving the technical effect of improving safety and controllability. By setting up inflation and deflation ports, the plug cap can be inflated and deflated in real time to regulate the air pressure inside the bladder, while facilitating disassembly. It adopts a two-part inflation-sealing structure to achieve highly reliable sealing of the inlet and efficient inflation and deflation. The system integrates multiple types of sensors to comprehensively monitor the gas state, and controls the system's air supply source and electric control valve based on the sensor data transmitted back to the control unit in real time, ensuring the inflation, deflation, and sealing functions of the plug cap. It solves the technical problems of unreliable sealing, poor environmental adaptability, and lack of real-time monitoring and control functions of traditional plug caps in aircraft air conditioning heat exchanger inlets. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a three-dimensional structural diagram of the plug cap of this utility model; Figure 2 This is a bottom view of the plug cap of this utility model; Figure 3 This is a front sectional view of the plug cap of this utility model; Figure 4 This is a top view of the plug cap of this utility model; Figure 5 This is a schematic diagram of the structure of the plug cap of this utility model in use; Figure 6 This is an end view of the air inlet connected to the plug cap of this utility model; Figure 7 This is a system composition diagram of the control and monitoring system of this utility model.

[0028] In the picture: 1. Second air valve; 2. Second connecting base; 3. Airbag body; 4. First sensor; 5. First air valve; 6. First connecting base; 7. Second sensor; 10. First air chamber; 20. Second air chamber; 30. Outer skirt; 40. Inner wrap skirt; 50. Mating groove; 70. Cross-shaped rubber vent holes; 100. Plug or seal; 101. Gas supply source; 102. First tee pipe; 103. First control valve; 104. Second control valve; 105. First pressure sensor; 106. First flow meter; 107. Second pressure sensor; 108. Second flow meter; 109. Second tee pipe; 110. Third tee pipe; 111. Third control valve; 112. Fourth control valve. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0030] like Figures 1-6 As shown, this utility model provides a plug, including an airbag body 3 that seals the air intake 60. The airbag body 3 has a first air chamber 10 and a second air chamber 20 arranged sequentially from the inside to the outside. The first air chamber 10 seals the inner cavity of the air intake 60 to form a primary sealing structure. The second air chamber 20 wraps around the outside of the air intake 60 to form a secondary sealing structure.

[0031] It should be noted that the air inlet 60 is actually a section of pipe.

[0032] Specifically, the first air chamber 10 is used to directly seal the pipe opening. After inflation, the chamber is cylindrical. The second air chamber 20 is used to wrap the outer diameter of the pipe. After inflation, the chamber is similar to the part between two cylindrical surfaces, achieving a double high-reliability seal. At the same time, it can efficiently inflate and deflate the gas. Meanwhile, the gas in the two parts can be controlled and monitored separately.

[0033] The plug of this utility model achieves double sealing inside and outside through a double-layer air cavity structure, which effectively improves the sealing reliability. After being filled with air, the first air cavity 10 fits tightly with the inner wall of the air inlet 60 to form a primary seal. After being filled with air, the second air cavity 20 expands and fits tightly with the external interface area to form a secondary seal compensation, which can adapt to deformation and thermal expansion and contraction under different working conditions.

[0034] like Figure 3 and Figure 5 As shown, the end of the second air chamber 20 protrudes from the end of the first air chamber 10 to form an outer wrapping skirt 30.

[0035] This invention designs the end of the second air chamber 20 to protrude beyond the end of the first air chamber 10, thus forming an outer skirt 30 structure. This effectively enhances the sealing coverage of the external interface area of ​​the air inlet 60 and improves the overall sealing stability. After inflation, the outer skirt 30 structure can evenly apply pressure to the root of the interface, reducing stress concentration and preventing sealing failure due to vibration or temperature changes. It also facilitates quick installation and disassembly, making it suitable for the complex and variable operating environment of aircraft air conditioning systems. Furthermore, the airbag body 3 is made of a high-temperature resistant and anti-aging composite elastic material, enabling stable operation in environments ranging from -50℃ to 200℃, ensuring long-term sealing performance. The first air chamber 10 and the second air chamber 20 are connected to an external control unit via independent air supply channels, allowing for staged inflation and deflation control to adapt to sealing requirements under different pressure conditions.

[0036] To facilitate processing and improve strength, the outer walls of the first air chamber 10 and the second air chamber 20 are partly integral structures and partly separate structures to form the inner wrapping skirt 40.

[0037] This invention combines an integrated and separate structure for the outer walls of the first air chamber 10 and the second air chamber 20. This design restricts the expansion of the inner air chamber to a localized rigid area, forming an internally encapsulated anchoring structure that enhances the pressure resistance of the primary seal. The separate sections allow the secondary air chamber to expand independently, improving the fit of the outer seal. This design effectively balances sealing strength and adaptability, maintaining a reliable seal even with minor deformation or surface unevenness at the air inlet 60. Furthermore, the integrated and separate structure facilitates molding, reducing manufacturing costs and improving product consistency. It also reduces fatigue cracking during frequent disassembly and reassembly, significantly extending service life. The rounded edges of each air chamber prevent stress concentration, further enhancing structural durability.

[0038] To prevent detachment, a matching groove 50 is provided on the outer wall of the second air chamber 20 corresponding to the outer edge of the inner wrapping skirt 40. In order to match the air inlet 60, a groove for matching the pipeline is provided, and the pipeline is placed in the groove.

[0039] The second air chamber 20 of this invention has a mating groove on its outer wall corresponding to the outer edge of the inner wrapping skirt 40, and a mating protrusion on the corresponding position of the air inlet 60. During installation, the mating protrusion of the air inlet 60 can be inserted into the mating groove. When the second air chamber 20 is inflated, its inner wall surface and the outer edge of the inner wrapping skirt 40 form a fitted fit, effectively suppressing radial deformation and preventing the sealing structure from shifting or detaching under the impact of high-pressure airflow. The pre-positioning design of the mating groove and the protrusion also facilitates installation alignment and improves assembly efficiency. After inflation, the second air chamber 20 and the inner wrapping skirt 40 work together to form a bidirectional constraint, further enhancing the reliability of the interface seal.

[0040] As an optional embodiment of this utility model, the groove 50 extends in the direction of the first air chamber 10 and forms a 90-degree angle with the outer wall of the first air chamber 10.

[0041] like Figures 1-6 As shown, in this embodiment, a first air valve 5 and a second air valve 1 are respectively disposed on the airbag body 3 and communicate with the first air chamber 10 and the second air chamber 20.

[0042] Specifically, the first air valve 5 is mounted on the airbag body 3 via the first connecting base 6, and the second air valve 1 is mounted on the airbag body 3 via the second connecting base 2. The first air valve 5 and the second air valve 1 can be opened and closed. When opened, gas can enter or exit; when closed, the first air chamber 10 and the second air chamber 20 can be isolated and sealed.

[0043] like Figure 6 As shown, the outer shell of the first air valve 5 or the second air valve 1 has a threaded section. One end of the thread is connected to the connecting base on the plug cover, and the other end is connected to the charging and discharging pipeline of the control and monitoring system. The first air valve 5 and the second air valve 1 are provided with a cross-shaped rubber air passage 70 to prevent foreign objects from entering the plug cover. When charging and discharging, the middle of the cross-shaped hole is deformed, and gas can pass through the air passage.

[0044] In this embodiment, the first air valve 5 is located on the end face of the plug cover, and the second air valve 1 is located on the side of the plug cover, which is used to connect to an external air source to realize inflation sealing and deflation disassembly; at the same time, a sensor base for measuring the temperature of the two parts is provided on the end face of the plug cover, which is used to install the first sensor 4 (temperature sensor) and the second sensor 7 (temperature sensor).

[0045] This invention achieves independent control of the two air chambers by setting a first air valve 5 and a second air valve 1, which facilitates the adjustment of inflation timing and pressure parameters according to actual working conditions, improving the accuracy and adaptability of the sealing response. The air valves adopt a self-locking structure design to ensure that they can maintain a stable airtight state even in a vibration environment, avoiding leakage due to loosening. The air valve communicating with the first air chamber 10 is located on the closed end face of the airbag body 3, and the air valve communicating with the second air chamber 20 is located on the side wall of the airbag body 3.

[0046] In this embodiment, a first sensor 4 and a second sensor 7 are also connected to the first air chamber 10 and the second air chamber 20, respectively.

[0047] Real-time parameters within the first air chamber 10 and the second air chamber 20 are obtained using the first sensor 4 and the second sensor 7.

[0048] Specifically, the first sensor 4 and the second sensor 7 are temperature sensors.

[0049] By acquiring the temperature inside the air chamber in real time through temperature sensors and monitoring the pressure fluctuation trend inside the air chamber in conjunction with temperature changes, dynamic prediction of the sealing status can be achieved.

[0050] To improve lifespan and elasticity, the airbag body 3 is made of multi-layer composite material.

[0051] Specifically, the airbag body 3 can be made of a multi-layered composite material with high elasticity, high temperature resistance, and good airtightness. It can be inflated through the air valve and then tightly fitted to the air inlet 60 to achieve a good sealing effect. At the same time, the air valve can also be used to release air and depressurize, making it easy to disassemble.

[0052] This utility model's plug cover, through its inflatable bladder structure, achieves a tight and robust seal, adapting to the high temperatures and other environments encountered during aircraft operation. It achieves a highly reliable sealing effect. Simultaneously, through independent dual-chamber control and sensor-based feedback, it enables real-time monitoring and dynamic compensation of the sealing status. It automatically adjusts internal pressure under temperature changes or vibration conditions, ensuring long-term sealing stability and effectively preventing leakage risks caused by pressure imbalance. This enhances the system's adaptability and safety in complex environments and reduces maintenance costs. The use of multi-layer composite materials not only improves the heat resistance and fatigue resistance of the bladder body 3 but also maintains good elasticity under extreme temperature conditions, preventing material embrittlement or excessive expansion that could lead to seal failure, further ensuring the plug cover's reliability and durability during long-term service.

[0053] like Figure 7 As shown, the present invention provides a control and monitoring system, including an air supply source 101, an inflation unit, an inflation unit, and a plug cover 100; wherein: the air supply source 101 is connected to both the first air chamber 10 and the second air chamber 20 of the inflation unit; the inflation unit is connected to both the first air chamber 10 and the second air chamber 20.

[0054] As a further improvement of this utility model, the inflation unit includes a first three-way pipe 102, a first inflation pipeline, a second inflation pipeline, a first control valve 103, a second control valve 104, a pressure sensor, and a flow meter; wherein: The first port of the first three-way pipe 102 is connected to the air supply source 101; the second port is connected to the second air chamber 20 through the first air filling pipe; and the third port is connected to the first air chamber 10 through the second air filling pipe. Pressure sensors and flow meters are respectively installed on the first and second inflation lines. The pressure sensor is used to detect the gas pressure inside the inflation bladder to determine whether the sealing state is stable. The temperature sensor is used to monitor changes in gas temperature to prevent sealing failure due to abnormal temperature. The flow meter is used to monitor changes in gas flow rate and determine whether gas leakage has occurred based on the flow rate changes. The data from the temperature sensor, pressure sensor, and flow meter are transmitted to the control unit in real time, and an alarm is issued in a timely manner when the gas performance data is abnormal.

[0055] The first control valve 103 is installed on the first inflation pipeline; The second control valve 104 is installed on the second inflation pipeline.

[0056] As a further improvement of this utility model, the venting unit includes a second three-way valve 109, a third three-way valve 110, a third control valve 111, and a fourth control valve 112; wherein: The first port of the second three-way valve 109 is connected to the outlet of the first control valve 103, the second port is connected to the inlet of the pressure sensor, and the third port is connected to the pipeline of the third control valve 111. The first port of the third three-way valve 110 is connected to the outlet of the second control valve 104, the second port is connected to the inlet of the pressure sensor, and the third port is connected to the pipeline of the fourth control valve 112.

[0057] Specifically, the pressure sensor and flow meter located on the first inflation line are the first pressure sensor 105 and the first flow meter 106, respectively; the pressure sensor and flow meter located on the second inflation line are the second pressure sensor 107 and the second flow meter 108, respectively.

[0058] The first control valve 103, the second control valve 104, the third control valve 111, and the fourth control valve 112 are all electrically controlled valves.

[0059] In use, each component in the control and monitoring system is connected to the control unit, and the gas from the gas supply source 101 can enter the plug cap body through the first three-way pipe 102, the first control valve 103, and the second control valve 104.

[0060] When the first air chamber 10 needs to be inflated, the second control valve 104 is opened. At this time, the first control valve 103, the third control valve 111, and the fourth control valve 112 are all closed. The gas from the gas supply source 101 enters the first air chamber 10 of the plug cap body through the first three-way pipe 102, the second control valve 104, and the third three-way valve 110. When the value of the second pressure sensor 107 matches the system setting value, the gas supply source 101 and the second control valve 104 are closed. When the first air chamber 10 needs to release air, the fourth control valve 112 is opened. At this time, the first control valve 103, the second control valve 104, and the third control valve 111 are all closed. The gas is discharged through the third three-way pipe 110 and the fourth control valve 112. When the value of the second pressure sensor 107 matches the system setting value, the fourth control valve 112 is closed.

[0061] When the second air chamber 20 needs to be inflated, the first control valve 103 is opened. At this time, the second control valve 104, the third control valve 111, and the fourth control valve 112 are all closed. The gas from the gas supply source 101 enters the second air chamber 20 of the plug cap body through the first three-way pipe 102, the first control valve 103, and the second three-way pipe 109. When the value of the first pressure sensor 105 matches the system setting value, the gas supply source 101 and the first control valve 103 are closed. When the second air chamber 20 needs to release air, the third control valve 111 is opened. At this time, the first control valve 103, the second control valve 104, and the fourth control valve 112 are all closed. The gas is discharged through the second three-way pipe 109 and the third control valve 111. When the value of the first pressure sensor 105 matches the system setting value, the third control valve 111 is closed.

[0062] When both the first air chamber 10 and the second air chamber 20 need to be inflated, the first control valve 103 and the second control valve 104 are opened. At this time, the third control valve 111 and the fourth control valve 112 are both closed. The gas from the gas supply source 101 enters the second air chamber 20 of the plug cap bladder through the first three-way pipe 102, the first control valve 103, and the second three-way pipe 109. At the same time, the gas from the gas supply source enters the first air chamber 10 of the plug cap bladder through the first three-way pipe 102, the second control valve 104, and the third three-way pipe 110. When the value of the first pressure sensor matches the system setting value, the first control valve 103 is closed. When the value of the second pressure sensor 107 matches the system setting value, the second control valve 104 is closed. Finally, the gas supply source 101 is shut off. When both the first air chamber 10 and the second air chamber 20 need to release air, the third control valve 111 and the fourth control valve 112 are opened. At this time, the first control valve 103 and the second control valve 104 are both closed. The gas can be discharged through the second three-way pipe 109 and the third control valve 111, and then through the third three-way pipe 110 and the fourth control valve 112. When the value of the first pressure sensor 105 matches the system setting value, the third control valve 111 is closed. When the value of the second pressure sensor 107 matches the system setting value, the fourth control valve 112 is closed.

[0063] The controller can achieve more accurate control by using real-time data from pressure and temperature sensors. The controller uses a gas volume control algorithm based on discrete proportional-integral-derivative control.

[0064] Specifically, the control algorithm is as follows: In the above formula, To control the calculated output value, i.e. the pressure value at time k; is a proportional constant coefficient used to adjust system deviation; e(k) is the error between the pressure data value acquired at time k and the set value. These are constant coefficients for integration, used to eliminate steady-state error in the system. This is the sum of errors from the beginning to time k; These are differential constant coefficients, which reduce dynamic deviation and settling time. This represents the error between the pressure sensor data value obtained at time k-1 and the set value.

[0065] Control and adjustment are performed based on the error between the real-time pressure data value and the set value, so that the system output value meets the set value. That is, when the plug needs to be inflated, the system air supply source is turned on to supply air, and the electric valve of the corresponding channel is opened. When the air pressure in the plug matches the set value, the air supply is stopped and the electric valve is closed.

[0066] Simultaneously based on the gas law: ; Where P is the control calculation output value. T is the temperature at time k, c is the gas constant, and V is the volume at time k.

[0067] Therefore, by controlling the output value P, temperature T, and gas constant c, the volume of the gas can be calculated, and an accurate gas volume can be provided by controlling the gas source.

[0068] This utility model's control and monitoring system includes a plug cap 100, a gas supply source 101, an inflation unit, and a deflation unit. The inflation unit includes gas performance detection (pressure, temperature, flow) sensors and a control and monitoring system (gas supply source 101, electric control valve, three-way valve, etc.). By setting up sensors for gas pressure, temperature, and flow, the plug cap 100 has the ability to perform real-time inflation and sealing, deflation and disassembly, real-time monitoring and control of gas performance indicators, and abnormal warning functions. Based on relevant sensor parameters, it provides abnormal feedback and system control, achieving the technical effect of improving safety and controllability. The system features an inflation / deflation port, allowing for real-time inflation / deflation of the plug cap 100 to regulate the internal pressure. It also facilitates easy disassembly. The two-part inflation-sealing structure ensures highly reliable sealing of the inlet and efficient inflation / deflation. The system integrates multiple sensors for comprehensive monitoring of the gas state and controls the system's air supply source 101 and electric control valve based on real-time sensor data transmitted back to the control unit, ensuring the inflation / deflation and sealing functions of the plug cap 100. This system solves the technical problems of unreliable sealing, poor environmental adaptability, and lack of real-time monitoring and control functions inherent in traditional plug caps 100 used in aircraft air conditioning heat exchanger inlets.

[0069] First, it should be noted that "inward" refers to the direction towards the center of the storage space, while "outward" refers to the direction away from the center of the storage space.

[0070] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the appendix. Figure 1 The orientations or positional relationships shown are for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0071] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0072] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0073] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0074] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0075] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A plug, characterized in that, The system includes an airbag body that seals the air intake inlet. The airbag body has a first air chamber and a second air chamber arranged sequentially from the inside to the outside. The first air chamber seals the inner cavity of the air intake inlet to form a primary sealing structure. The second air chamber wraps around the outside of the air intake inlet to form a secondary sealing structure.

2. The plug cap according to claim 1, characterized in that, The end of the second air chamber protrudes beyond the end of the first air chamber to form an outer wrapping skirt.

3. The plug cap according to claim 2, characterized in that, The outer walls of the first and second air chambers are partly an integral structure and partly a separate structure to form an inner wrapping skirt.

4. The plug cap according to claim 3, characterized in that, A matching groove is provided on the outer wall of the second air cavity corresponding to the outer edge of the inner wrapping skirt.

5. The plug cap according to claim 4, characterized in that, The mating groove extends toward the first air cavity and forms a 90-degree angle with the outer wall of the first air cavity.

6. The plug cap according to claim 1, characterized in that, It also includes a first air valve and a second air valve disposed on the airbag body and communicating with the first air chamber and the second air chamber respectively.

7. The plug cap according to claim 1, characterized in that, It also includes a first sensor and a second sensor that are respectively connected to the first air chamber and the second air chamber.

8. A control and monitoring system, characterized in that, It includes an air supply source, an inflation unit, an inflation unit, and a plug as described in any one of claims 1-7; wherein: the air supply source is connected to both the first air chamber and the second air chamber of the inflation unit; and the inflation unit is connected to both the first air chamber and the second air chamber.

9. The control and monitoring system according to claim 8, characterized in that, The inflation unit includes a first tee pipe, a first inflation line, a second inflation line, a first control valve, a second control valve, a pressure sensor, and a flow meter; wherein: The first port of the first three-way pipe is connected to the air supply source; the second port is connected to the second air chamber through the first inflation pipe; and the third port is connected to the first air chamber through the second inflation pipe. The pressure sensor and the flow meter are respectively installed on the first inflation pipeline and the second inflation pipeline; The first control valve is installed on the first inflation line; The second control valve is located on the second inflation line.

10. The control and monitoring system according to claim 9, characterized in that, The venting unit includes a second three-way valve, a third three-way valve, a third control valve, and a fourth control valve; wherein: The first port of the second three-way valve is connected to the outlet of the first control valve, the second port is connected to the inlet of the pressure sensor, and the third port is connected to the pipeline of the third control valve. The first port of the third three-way valve is connected to the outlet of the second control valve, the second port is connected to the inlet of the pressure sensor, and the third port is connected to the pipeline of the fourth control valve.

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