A portable intelligent dry air protection device

Abstract

The application discloses a portable intelligent dry air protection device, which comprises a shell, an air inlet interface and an air outlet interface embedded in the shell, an internal air pipe communicated with the air inlet interface and the air outlet interface, a pressure sensor module, a dew point sensor module, a self-control execution valve body, a control module and a power module arranged in the shell, the pressure sensor module and the dew point sensor module are respectively communicated with the internal air pipe, and the self-control execution valve body is connected in series with the internal air pipe; the control module is electrically connected with the pressure sensor module, the dew point sensor module, the self-control execution valve body and the power module, and the power module is electrically connected with the pressure sensor module, the dew point sensor module, the self-control execution valve body and the control module. The monitoring, control, execution and power supply functions are highly integrated in the shell, and the device has the advantages of independent power supply, quick insertion, portability, rapid response and the like, can be used for air maintenance of important nuclear power equipment, and can effectively prevent the downstream equipment from being damaged due to excessively high air source pressure or excessively high humidity.

Description

Technical Field

[0001] This invention relates to the field of maintenance technology for critical equipment in nuclear power plants, and in particular to a portable intelligent dry air protection device. Background Technology

[0002] During major overhauls or long-term equipment shutdowns at nuclear power plants, effective moisture-proof maintenance measures are required for critical equipment with high insulation and moisture-proof requirements (such as exciters and generators). Currently, a common maintenance solution involves wrapping the equipment with a moisture-proof cloth, but not completely sealing it, and then connecting it to a compressed air hose to continuously supply dry compressed air (typically requiring a dew point below -20°C). This maintains a slightly positive pressure in the equipment's microenvironment, preventing the entry of humid external air and achieving the purpose of moisture-proof maintenance.

[0003] The aforementioned dry compressed air typically originates from the plant's compressed air system (such as the SAT system). However, during operation, the plant's compressed air system may experience occasional, momentary excessive pressure or accidental water ingress. Feedback indicates that there have been historical incidents of water ingress into the SAT system, leading to a serious accident during exciter maintenance where liquid water was discharged from the compressed air pipeline. If such abnormal gases are directly introduced into the maintenance equipment without treatment, it may cause damage due to overpressure, or even worse, lead to decreased insulation performance due to the ingress of large amounts of moisture or liquid water, potentially resulting in short circuits and other major safety incidents.

[0004] In summary, existing maintenance solutions use bulky devices that require on-site wiring and fixed installation, are cumbersome to operate, and pose significant safety risks. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a portable intelligent air dryer protection device.

[0006] The technical solution adopted by this invention to solve its technical problem is: to construct a portable intelligent dry air protection device, comprising: case; An air inlet and an air outlet are embedded in the housing; An internal air pipe connecting the air inlet and the air outlet; A pressure sensor module, a dew point sensor module, and a self-regulating valve body are disposed inside the housing. The pressure sensor module and the dew point sensor module are respectively connected to the internal air pipe, and the self-regulating valve body is connected in series to the internal air pipe to control the on / off state. A control module and a power supply module are disposed inside the housing. The control module is electrically connected to the pressure sensor module, the dew point sensor module, the self-regulating valve body, and the power supply module, respectively. The power supply module is electrically connected to the pressure sensor module, the dew point sensor module, the self-regulating valve body, and the control module, respectively. The control module is configured to: receive the pressure signal detected by the pressure sensor module and the dew point temperature signal detected by the dew point sensor module, and compare the pressure signal with a preset pressure threshold and the dew point temperature signal with a preset dew point threshold; when the pressure signal exceeds the preset pressure threshold or the dew point temperature signal exceeds the preset dew point threshold, the control module controls the automatic control valve to close and cut off the gas supply.

[0007] Furthermore, both the air inlet and the air outlet include an integrally formed quick-connect connector and an outer tube, with the outer tube embedded in the housing for fixation.

[0008] Furthermore, the internal air pipe includes an air inlet section and an air outlet section. The first end of the air inlet section is integrally formed with the air inlet interface, and the second end of the air inlet section is sealed and connected to the air inlet end of the self-controlled actuator body. The first end of the air outlet section is integrally formed with the air outlet interface, and the second end of the air outlet section is sealed and connected to the air outlet end of the self-controlled actuator body. The pressure sensor module and the dew point sensor module are located on the intake pipe section.

[0009] Furthermore, the housing is provided with a main chamber and a secondary chamber, which are sealed and isolated from each other. The pressure sensor module, the dew point sensor module, and the self-controlled actuator body are integrated and stacked in the main chamber along the longitudinal direction of the housing, and the control module and the power module are embedded in the secondary chamber.

[0010] Furthermore, the self-controlled actuator body is a normally open electric actuator with a built-in reset spring, which automatically resets and opens after power failure.

[0011] Furthermore, the pressure sensor module is a patch-type pressure sensor with a range of 0 bar to 10 bar, an accuracy of ±0.02 bar, and an output signal of 4 mA to 20 mA.

[0012] Furthermore, the dew point sensor module is a chip-type online dew point sensor with a detection range of -60℃ to 0℃ and a response time of ≤3 seconds.

[0013] Furthermore, the power module is a rechargeable lithium battery, and the housing is provided with a Type-C fast charging interface that is electrically connected to the power module; The control module is also configured to: monitor the voltage of the power module, issue an undervoltage warning signal when the voltage is lower than the undervoltage threshold, and control the self-controlled actuator to close the valve body after a delay before the power is exhausted.

[0014] Furthermore, it also includes an alarm module, which is electrically connected to the control module and is placed inside the housing and / or integrated on the surface of the housing; the alarm module includes a buzzer and / or an LED indicator, which drives the alarm module to issue an audible and visual alarm when the control module determines that the pressure exceeds the limit, the dew point exceeds the limit, or the power supply is undervoltage.

[0015] Furthermore, it also includes a manual reset button, which is electrically connected to the control module to manually control the opening of the self-controlled actuator valve after the fault is cleared; the control module is also configured with an automatic reset mode, which automatically opens the self-controlled actuator valve when the pressure drops to a safe value and the dew point returns to normal.

[0016] By implementing this invention, the following beneficial effects are achieved: This invention relates to a portable intelligent air drying protection device that integrates a pressure sensor module, a dew point sensor module, a self-regulating valve body, a control module, and a power supply module into a single housing, forming a highly integrated and portable structure. It integrates both pressure and dew point sensor modules, and the control module can receive and compare gas pressure and dew point temperature signals in real time. When either parameter exceeds a preset safety threshold, it can independently trigger a valve closure, achieving proactive and real-time protection against both overpressure and moisture risks to downstream equipment, fundamentally eliminating the possibility of equipment damage due to abnormal gas supply. Furthermore, by presetting pressure and dew point thresholds and configuring automatic comparison and control logic in the control module, when abnormal gas parameters are detected, the control module can automatically and quickly drive the valve body to close, cutting off the gas supply. The entire process requires no manual intervention, avoiding accidents caused by human negligence or delayed response. A built-in independent power supply module provides all the operating power for the pressure sensor, dew point sensor, self-regulating valve body, and control module. The device is freed from the constraints of cables during operation, significantly improving its applicability and convenience in complex environments such as high altitudes and confined spaces. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings: Figure 1 This is a schematic diagram of the overall structure of a portable intelligent dry air protection device according to an embodiment of the present invention; Figure 2yes Figure 1 A partial schematic diagram of a portable intelligent dry air protection device, wherein the upper housing is not shown; Figure 3 yes Figure 2 A top view of the portable intelligent dry air protection device in the image; Figure 4 yes Figure 3 A schematic diagram of the air intake, internal air pipe and air outlet. Detailed Implementation

[0018] To provide a clearer understanding of the technical features, objectives, and effects of the present invention, specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0019] In the description of the invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not 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 the invention. Furthermore, the terms "first," "second," etc., 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 with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of the invention, unless otherwise stated, "a plurality of" means two or more.

[0020] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or a chemical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0021] See Figure 1 and Figure 4One embodiment of the present invention discloses a portable intelligent dry air protection device, which can be used for the gas filling and maintenance of important equipment in nuclear power plants. It includes a housing 1, an air inlet 2 and an air outlet 3 embedded in the housing 1, an internal air pipe 4 connecting the air inlet 2 and the air outlet 3, a pressure sensor module 5, a dew point sensor module 6, a self-controlled actuator valve body 7, a control module 8, and a power module 9, all disposed within the housing 1. The pressure sensor module 5, the dew point sensor module 6, and the self-controlled actuator valve body 7 are respectively connected to the internal air pipe 4, and the self-controlled actuator valve body 7 is connected in series with the internal air pipe 4 to control the on / off state.

[0022] The control module 8 is electrically connected to the pressure sensor module 5, the dew point sensor module 6, the automatic control valve body 7, and the power module 9, respectively. The power module 9 is electrically connected to the pressure sensor module 5, the dew point sensor module 6, the automatic control valve body 7, and the control module 8, respectively.

[0023] The control module 8 is configured to receive the pressure signal detected by the pressure sensor module 5 and the dew point temperature signal detected by the dew point sensor module 6, and compare the pressure signal with a preset pressure threshold and the dew point temperature signal with a preset dew point threshold. When the pressure signal exceeds the preset pressure threshold or the dew point temperature signal exceeds the preset dew point threshold, the control module 8 controls the automatic control valve body 7 to close and cut off the gas supply.

[0024] This portable intelligent air-drying protection device integrates a pressure sensor module 5, a dew point sensor module 6, an automatic control valve body 7, a control module 8, and a power supply module 9 all within a single housing 1, forming a highly integrated, unified structure that significantly reduces overall size and weight, making it portable. It integrates both the pressure sensor module 5 and the dew point sensor module 6, and the control module 8 can receive and compare gas pressure and dew point temperature signals in real time. When either parameter exceeds a preset safety threshold, it can independently trigger a valve closure. This provides proactive, real-time protection against both overpressure and moisture risks to downstream equipment, fundamentally eliminating the possibility of equipment damage due to abnormal gas supply. Furthermore, the control module 8 presets pressure and dew point thresholds and configures automatic comparison and control logic. When abnormal gas parameters are detected, the control module 8 can automatically and quickly drive the valve body to close, cutting off the gas supply. The entire process requires no manual intervention, avoiding accidents caused by human negligence or delayed response. The built-in independent power supply module 9 provides all the operating power for the pressure sensor, dew point sensor, automatic control valve body 7, and control module 8. The device is freed from the constraints of cables during operation, significantly improving its applicability and convenience in complex environments such as high altitudes and confined spaces.

[0025] Furthermore, such as Figure 2 and Figure 3As shown, in some embodiments, both the air inlet 2 and the air outlet 3 include an integrally formed quick-connect connector 21 and an outer tube 22, with the outer tube 22 embedded and fixed in the housing 1. The quick-connect connector 21 can be a stainless steel quick-connect female, used for convenient connection of compressed air hoses or rigid pipes. Users can insert and connect DN15~DN20 compressed air hoses or rigid pipes by hand without any tools, achieving rapid assembly and disassembly in 3 seconds, greatly improving the convenience of on-site deployment. The outer tube 22 can be welded to the housing 1 to form a single integrated structure. Figure 3 As shown, only the quick-connect connector 21 and outer tube 22 of the left air intake port 2 are indicated. The quick-connect connector 21 and outer tube 22 of the right air outlet port 3 are not indicated. The air intake port 2 and the air outlet port 3 have the same structure. The air outlet port 3 can be referred to the diagram of the left air intake port 2.

[0026] Understandably, to prevent foreign objects from entering critical nuclear power equipment, a filter can be installed at the gas outlet, for example, on the automatic control valve body 7 or the gas outlet port 3. Specifically, it can be installed on the outer pipe body 22 and near the quick-connect connector 21, which can both intercept foreign objects and facilitate the cleaning of foreign objects or replacement of the filter. The filter is not shown in the diagram.

[0027] Furthermore, such as Figure 4 As shown, in some embodiments, the internal air pipe 4 includes an inlet pipe section 41 and an outlet pipe section 42. The first end of the inlet pipe section 41 is integrally formed with the inlet interface 2, and the second end of the inlet pipe section 41 is sealed to the inlet end of the self-controlled actuator valve body 7. The first end of the outlet pipe section 42 is integrally formed with the outlet interface 3, and the second end of the outlet pipe section 42 is sealed to the outlet end of the self-controlled actuator valve body 7. The pressure sensor module 5 and the dew point sensor module 6 are provided on the inlet pipe section 41. Specifically, the quick-connect connector 21 and the outer tube 22 of the inlet interface 2 are integrally formed with the inlet pipe section 41, and the quick-connect connector 21 and the outer tube 22 of the outlet interface 3 are integrally formed with the outlet pipe section 42. Two connection ports 43 are also reserved on the side wall of the inlet pipe section 41 for connection to the pressure sensor module 5 and the dew point sensor module 6, respectively. Preferably, they are threaded connections, and a face sealing structure is used to achieve sealing. The two connection ports 43 are spaced apart on the same side. Similarly, the intake pipe section 41 and the exhaust pipe section 42 are sealed with the self-controlled actuator valve body 7 using an end face sealing structure.

[0028] The present invention, through its integral molding structure, especially the integral molding of the air inlet pipe section 41 and the air inlet interface 2 and the air outlet pipe section 42 and the air outlet interface 3, can ensure no leakage under the 8 bar pressure resistance test and meet the safety margin requirement of the 6 bar working pressure.

[0029] Furthermore, such as Figure 3As shown, in some embodiments, the housing 1 is provided with a main chamber 11 and a secondary chamber 12, which are sealed and isolated from each other. The pressure sensor module 5, the dew point sensor module 6, and the self-controlled actuator valve body 7 are integrated and stacked in the main chamber 11 along the longitudinal direction of the housing 1, and the control module 8 and the power module 9 are disposed in the secondary chamber 12.

[0030] The main chamber 11 is the core of the air path. The air inlet 2 and the air outlet 3 are arranged opposite each other along the longitudinal direction of the housing 1, so that the air path formed by the air inlet 2, the internal air passage, the self-control actuator 7, and the air outlet 3 is arranged in a straight line, which greatly shortens the air path stroke. The pressure sensor module 5, the dew point sensor module 6, and the self-control actuator 7 are integrated and stacked along the longitudinal direction of the housing 1, which can maximize the use of the space in the main chamber 11 and achieve a compact layout.

[0031] The secondary chamber 12 is used to house the control module 8 and the power module 9. It can be completely isolated from the main chamber 11 by a sealing partition to ensure that water vapor or pressure in the gas path will not affect the normal operation of electronic components.

[0032] Optionally, the housing 1 includes an upper housing 1 and a lower housing 1, which are sealed and spliced ​​together and both are made of aerospace-grade aluminum alloy, achieving lightweight while ensuring strength. The interior of the housing 1 is divided into a main chamber 11 and secondary chambers 12 located on one or both sides of it. The main chamber 11 and the secondary chambers 12 are physically isolated and sealed by a sealing partition to prevent gas leakage from affecting electronic components. The overall protection level reaches IP54, providing dustproof and splashproof capabilities, suitable for portable outdoor use. The sealing partition is not shown in the figure.

[0033] Furthermore, in some embodiments, the self-controlled valve body 7 is a normally open electric actuator with a built-in return spring, which automatically resets and opens after power failure. Optionally, the self-controlled valve body 7 uses an electric actuator driven by a miniature DC motor and has a built-in return spring. During normal operation, the self-controlled valve body remains open. When a fault occurs, the control module 8 powers on the motor to close the self-controlled valve body, achieving fault safety protection. After the fault is cleared, the control module 8 disconnects the power supply to the drive motor, and the return spring immediately resets and opens the self-controlled valve body.

[0034] Furthermore, in some embodiments, the pressure sensor module 5 is a patch-type pressure sensor with a range of 0 bar to 10 bar, an accuracy of ±0.02 bar, and an output signal of 4 mA to 20 mA. Specifically, the pressure sensor module 5 uses a high-precision patch-type MEMS pressure sensor with a range of 0 bar to 10 bar (adapted to a 6 bar working pressure design), and outputs a 4 mA to 20 mA standard analog signal to the control module 8. Its monitoring accuracy can reach ±0.02 bar, accurately capturing instantaneous pressure fluctuations and providing a reliable basis for overpressure protection.

[0035] Furthermore, in some embodiments, the dew point sensor module 6 is a chip-type online dew point sensor with a detection range of -60℃ to 0℃ and a response time of ≤3 seconds. Optionally, the dew point sensor module 6 is a miniature chip-type online dew point sensor, directly embedded in the center of the airflow channel without an external probe, which can reflect the trace moisture content in compressed air in real time and quickly, ensuring that it is detected before the humid air reaches the downstream equipment.

[0036] Furthermore, in some embodiments, the power module 9 is a rechargeable lithium battery, and the housing 1 is provided with a Type-C fast charging interface electrically connected to the power module 9. Optionally, the rechargeable lithium battery can be a 12V, 20mm×50mm ultra-thin rechargeable lithium battery, with a capacity designed to support continuous operation of the device for more than 72 hours. The Type-C fast charging interface supports 5V input and can be fully charged in 1 hour. The power module 9 has built-in overcharge, over-discharge, and short-circuit protection circuits and is sealed to prevent damage from moisture.

[0037] The control module 8 employs a miniature intelligent control motherboard, integrating pressure signal reception, dew point signal reception, valve control drive, and logic operation functions. It has a preset 6-bar overpressure threshold, and the dew point parameter can be finely adjusted with one click. The overall design adopts low power consumption and is compatible with battery power. Optionally, the control module 8 is also configured to monitor the voltage of the power module 9 and issue an undervoltage warning signal when the voltage falls below the undervoltage threshold to remind the user to take action.

[0038] Furthermore, in some embodiments, the portable intelligent dry air protection device also includes an alarm module, which is electrically connected to the control module 8 and is located inside the housing 1 and / or integrated on the surface of the housing 1. The alarm module includes a buzzer and / or an LED indicator. When the control module 8 determines that the pressure, dew point, or power supply is excessive, it drives the alarm module to issue an audible and visual alarm. Specifically, the alarm module may include a surface-mount buzzer and a dual-color (red / green) LED indicator, integrated on the surface of the housing 1. A solid green light indicates normal operation, while a flashing red light accompanied by a buzzer indicates abnormal pressure / dew point / power supply. The audible and visual alarm signals are intuitive and eye-catching, facilitating timely fault detection by on-site personnel. The alarm module is not shown in the diagram.

[0039] Furthermore, in some embodiments, the portable intelligent dry air protection device also includes a manual reset button, which is electrically connected to the control module 8 to manually control the automatic control valve 7 to open after the fault is cleared. The control module 8 is also equipped with an automatic reset mode, which automatically opens the automatic control valve when the pressure drops to a safe value and the dew point returns to normal. Specifically, the manual reset button is a concealed design, located on the surface of the housing 1. After the fault is cleared, pressing this button sends a reset signal to the control module 8 to reopen the automatic control valve 7. Simultaneously, the control module 8 is also equipped with an automatic reset mode, which automatically opens the automatic control valve when the pressure drops to a safe value and the dew point returns to normal, without manual intervention.

[0040] The complete working logic and process of this portable intelligent air dryer / protection device are as follows: After the device is powered on, control module 8 executes the following logic: First, self-test and initialization: Detects the voltage of power module 9. If the voltage is low, the alarm module is triggered to issue a low-voltage warning (e.g., a slow flashing red light), and after a preset delay (e.g., 30 seconds), the self-control actuator valve 7 is forcibly closed (if it is in the open state). If the voltage is normal, it enters monitoring mode.

[0041] Second, under normal operating conditions: Control module 8 continuously reads the pressure value from pressure sensor module 5 and the dew point value from dew point sensor module 6. When the pressure value is ≤6 bar and the dew point value is ≤ a set threshold (e.g., -20℃), it is considered normal. Control module 8 outputs a drive signal to the automatic control valve body 7 to keep it open. Compressed air flows in from inlet port 2, passes sequentially through the pressure sensor, dew point sensor, and the open valve body, and finally flows out from outlet port 3 to downstream maintenance equipment, maintaining a slightly positive pressure environment.

[0042] Third, overpressure protection: When the control module 8 detects a pressure value > 6 bar, the control module 8 powers on the motor to immediately close the self-controlled valve body to cut off the gas supply. Simultaneously, the control module 8 drives the alarm module to emit a rapid flashing red light and a buzzer sound (overpressure alarm). Once the pressure drops to a safe value, the user can manually open the valve body via the manual reset button, or the control module 8 can automatically reset it, i.e., automatically powering off and opening the self-controlled valve body after a delay of several seconds once the pressure is normal and the dew point meets the standard.

[0043] Fourth, dew point protection: When the control module 8 detects that the dew point value is greater than the set threshold (e.g., -20℃), it will immediately close the valve and drive the alarm module to issue another warning (e.g., a constant red light + intermittent buzzer, or a rapid alarm similar to that for overpressure) to indicate that the intake air humidity is too high. After the dew point returns to normal, the reset logic is the same as the overpressure protection above, and it can be manually or automatically reset.

[0044] Fifth, power protection: During normal operation, if the control module 8 detects that the voltage of the power module 9 drops to the undervoltage threshold (e.g., 10V), it will drive the alarm module to issue an undervoltage warning (e.g., slow flashing red light + short beep), prompting the user that charging is required.

[0045] This portable intelligent dry air protection device, through its integrated design and intelligent control logic of control module 8, provides a solid and reliable gas safety barrier for important equipment such as nuclear power plants without any external power supply or tools, completely eliminating the risks of overpressure and moisture under traditional gas supply methods.

[0046] By implementing this invention, the following beneficial effects are achieved: 1. High integration and extremely small size: All functional modules such as pressure monitoring, dew point monitoring, automatic execution, intelligent control, independent power supply and audible and visual alarm are integrated into a single housing 1, abandoning the traditional separate component layout. The housing 1 can be controlled to the size of a palm, and there are no external pipelines or control boxes, making it portable.

[0047] 2. Precise overpressure protection and sensitive dew point protection ensure safety and reliability: Simultaneously monitors gas pressure and dew point. If either exceeds the preset safety threshold (such as pressure > 6 bar or dew point > -20℃), it will instantly trigger the valve shut-off action, fundamentally eliminating the risk of downstream equipment being damaged due to overpressure or moisture.

[0048] 3. Independent power supply, wide applicability, no external dependence: Built-in rechargeable lithium battery, no on-site power connection or external gas source required, can be quickly deployed in any situation requiring temporary drying gas supply, suitable for mobile construction, temporary gas supply, field operations and other scenarios. The lithium battery has built-in overcharge, over-discharge and short circuit protection, and is sealed to avoid moisture damage, ensuring safe and reliable power supply.

[0049] 4. Quick-connect connector 21, plug and play, highly portable: With quick-connect connector 21, no flange or bolts are needed, and installation and disassembly can be completed by hand in 3 seconds.

[0050] 5. Fault self-locking, safe and reliable: The self-controlled valve body adopts a motor drive and return spring combination, keeping the valve body open during normal operation. In the event of abnormal conditions such as overpressure or excessive dew point, the control module cuts off the motor power and closes the valve body. Simultaneously, the device has an audible and visual fault alarm function to ensure the safety of critical equipment under any abnormal circumstances.

[0051] It is understood that the above embodiments only illustrate preferred embodiments of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that for those skilled in the art, the above embodiments or technical features can be freely combined, and several modifications and improvements can be made without departing from the concept of the present invention. These all fall within the protection scope of the present invention. That is, the embodiments described "in some embodiments" can be freely combined with any of the embodiments above and below. Therefore, all equivalent transformations and modifications made within the scope of the claims of the present invention should fall within the scope of the claims of the present invention.

Claims

1. A portable intelligent air-drying protection device, characterized in that, include: Shell (1); An air inlet (2) and an air outlet (3) are embedded in the housing (1). An internal air pipe (4) connects the air inlet (2) and the air outlet (3). The pressure sensor module (5), dew point sensor module (6), and self-controlled actuator valve body (7) are installed inside the housing (1). The pressure sensor module (5) and the dew point sensor module (6) are respectively connected to the internal air pipe (4). The self-controlled actuator valve body (7) is connected in series to the internal air pipe (4) to control the on / off state. The control module (8) and power module (9) are disposed in the housing (1). The control module (8) is electrically connected to the pressure sensor module (5), the dew point sensor module (6), the self-controlled actuator valve body (7) and the power module (9), respectively. The power module (9) is electrically connected to the pressure sensor module (5), the dew point sensor module (6), the self-controlled actuator valve body (7) and the control module (8), respectively. The control module (8) is configured to: receive the pressure signal detected by the pressure sensor module (5) and the dew point temperature signal detected by the dew point sensor module (6), and compare the pressure signal with a preset pressure threshold and the dew point temperature signal with a preset dew point threshold; when the pressure signal exceeds the preset pressure threshold or the dew point temperature signal exceeds the preset dew point threshold, the control module (8) controls the self-controlled actuator valve (7) to close and cut off the gas supply.

2. The portable intelligent dry air protection device according to claim 1, characterized in that, Both the air inlet (2) and the air outlet (3) include an integrally formed quick-connect connector (21) and an outer tube (22), with the outer tube (22) embedded in the housing (1) for fixation.

3. The portable intelligent dry air protection device according to claim 1, characterized in that, The internal air pipe (4) includes an air inlet section (41) and an air outlet section (42). The first end of the air inlet section (41) is integrally formed with the air inlet interface (2), and the second end of the air inlet section (41) is sealed and connected to the air inlet end of the self-controlled actuator valve body (7). The first end of the air outlet section (42) is integrally formed with the air outlet interface (3), and the second end of the air outlet section (42) is sealed and connected to the air outlet end of the self-controlled actuator valve body (7). The pressure sensor module (5) and the dew point sensor module (6) are mounted on the air intake pipe section (41).

4. The portable intelligent dry air protection device according to claim 1, characterized in that, The housing (1) is provided with a main chamber (11) and a secondary chamber (12). The main chamber (11) and the secondary chamber (12) are sealed and isolated. The pressure sensor module (5), the dew point sensor module (6) and the self-controlled actuator valve body (7) are integrated and stacked in the main chamber (11) along the longitudinal direction of the housing (1). The control module (8) and the power module (9) are disposed in the secondary chamber (12).

5. The portable intelligent air-drying protection device according to claim 1, characterized in that, The self-controlled actuator body (7) is a normally open electric actuator with a built-in reset spring, which automatically resets and opens after power failure.

6. The portable intelligent air dryer protection device according to claim 1, characterized in that, The pressure sensor module (5) is a patch pressure sensor with a range of 0 bar to 10 bar, an accuracy of ±0.02 bar, and an output signal of 4 mA to 20 mA.

7. The portable intelligent air-drying protection device according to claim 1, characterized in that, The dew point sensor module (6) is a chip-type online dew point sensor with a detection range of -60℃ to 0℃ and a response time of ≤3 seconds.

8. The portable intelligent dry air protection device according to claim 1, characterized in that, The power module (9) is a rechargeable lithium battery, and the housing (1) is provided with a Type-C fast charging interface that is electrically connected to the power module (9); The control module (8) is also configured to: monitor the voltage of the power module (9), issue an undervoltage warning signal when the voltage is lower than the undervoltage threshold, and control the self-controlled actuator (7) to close before the power is exhausted.

9. The portable intelligent air dryer protection device according to claim 1, characterized in that, It also includes an alarm module, which is electrically connected to the control module (8) and is placed inside the housing (1) and / or integrated on the surface of the housing (1); the alarm module includes a buzzer and / or an LED indicator, which drives the alarm module to issue an audible and visual alarm when the control module (8) determines that the pressure exceeds the limit, the dew point exceeds the limit or the power supply is undervoltage.

10. The portable intelligent dry air protection device according to claim 1, characterized in that, It also includes a manual reset button, which is electrically connected to the control module (8) to manually control the opening of the self-controlled actuator valve (7) after the fault is cleared; the control module (8) is also equipped with an automatic reset mode, which automatically opens the self-controlled actuator valve when the pressure drops to a safe value and the dew point returns to normal.

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