Intelligent blowing instrument

Abstract

The application provides a kind of intelligent blowing instrument, it is related to blowing instrument technical field.The intelligent blowing instrument includes instrument box, gas source interface, filter pressure reducing valve, intelligent gas flow controller, intelligent conversion output module and multiple blowing interfaces;Gas source interface, filter pressure reducing valve and each blowing interface are arranged on the instrument box;Intelligent gas flow controller and intelligent conversion output module are arranged in the instrument box.Wherein, intelligent gas flow controller is used to adjust the flow size of received compressed air, and is distributed to intelligent conversion output module and each blowing interface;Intelligent conversion output module is used to measure the pressure difference signal between each first blowing pipe, and calculates the target variable parameter of the liquid in the measured tank based on the pressure difference signal.The intelligent blowing instrument of the embodiment replaces the design of traditional steady flow valve and float flowmeter by intelligent gas flow controller and intelligent conversion output module, and improves the measurement efficiency of the target variable parameter of the liquid in the measured tank.

Description

Technical Field

[0001] This application belongs to the field of air blowing instrument technology, specifically relating to an intelligent air blowing instrument. Background Technology

[0002] Most non-contact measuring instruments, such as ultrasonic and infrared instruments, cannot measure the liquid level of the medium inside the equipment while keeping the measuring unit away from the equipment. Therefore, the "air blowing principle" non-contact measurement of the air blowing instrument has unique application advantages.

[0003] The air blowing instrument blows compressed gas at a stable pressure and flow rate through an air blowing tube. This gas overflows from the lower end of the air blowing tube inserted into the device under test, forming continuous, uniform, and stable bubbles. Because the amount of bubbles at the lower end of the air blowing tube is minute and the gas flow rate is low, the air loss along the blowing tube is negligible. Therefore, in actual measurement, the gas pressure inside the air blowing tube is almost equal to the static pressure of the liquid level at the lower end of the air blowing tube. By detecting the differential pressure signal between the air blowing tubes, the air blowing instrument can measure variable parameters such as the liquid level, density, interface, and column weight of the measuring vessel.

[0004] Traditional gas blowing instruments consist of a purely mechanical, manually adjustable float flowmeter module and an analog differential pressure measurement unit, resulting in a low level of intelligence. They suffer from adjustment lag and low measurement efficiency. Summary of the Invention

[0005] The technical problem to be solved by this application is to provide an intelligent air blowing instrument that addresses the above-mentioned shortcomings of the existing technology. This intelligent air blowing instrument has a high degree of intelligence and high measurement efficiency.

[0006] This application provides an intelligent air blowing instrument, including: Instrument housing, air source interface, filter pressure reducing valve, intelligent gas flow controller, intelligent conversion output module and multiple air blowing interfaces; The gas source interface, filter pressure reducing valve, and various air blowing interfaces are located on the instrument box; the intelligent gas flow controller and intelligent conversion output module are located inside the instrument box. The outlet of the gas source interface is connected to the inlet of the filter pressure reducing valve; the outlet of the filter pressure reducing valve is connected to the first end of the intelligent gas flow controller. The second end of the intelligent gas flow controller is connected to the air inlet of each blowing interface, and the third end is connected to the intelligent conversion output module; The air inlet of the air source interface is connected to the air source, and the air outlet of each air blowing interface is connected to the first air blowing pipe of the liquid tank being tested. The air source interface is used to transmit compressed air to the intelligent gas flow controller after the compressed air is reduced in pressure by the filter and pressure reducing valve. The intelligent gas flow controller is used to regulate the flow rate of the received compressed air and distribute the output to the intelligent conversion output module and each air blowing interface; The intelligent conversion output module is used to measure the pressure difference signal between each first air blowing pipe and to calculate the target variable parameters of the liquid in the measured tank based on the pressure difference signal.

[0007] In some implementations, the intelligent gas flow controller includes: an air inlet block, multiple second air blowing pipes, multiple flow control submodules, and multiple connection ports; There is a one-to-one correspondence between the second air blowing tube, the flow control submodule, and the connection port; The air inlet of the air inlet block is connected to the air outlet of the filter pressure reducing valve, and the air outlet is connected to the air inlet of each flow control submodule. The first air outlet of each flow control submodule is connected to the air inlet of the corresponding second air blowing pipe; The second air outlet of each flow control submodule is connected to the air inlet of the corresponding connection port; The air outlets of each connection port are connected to the air inlets of the intelligent conversion output module; The air outlet of each second air blowing pipe is connected to the air inlet of the corresponding air blowing interface; Each flow control submodule is used to adjust the flow rate of the received compressed air and distribute the output to the corresponding second air blowing pipe and the corresponding connection port.

[0008] In some implementations, the flow control submodule includes: multiple flow controllers and multiple proportional valve power boards; The flow controller, the second air blowing pipe, and the proportional valve power supply board are in one-to-one correspondence. The flow controller includes a proportional valve, a connecting block, and a valve seat; The proportional valve is fixedly connected to the valve seat via a connecting block; The air inlet of the valve seat is connected to the air outlet of the air inlet block, the first air outlet is connected to the air inlet of the corresponding second air blowing pipe, the second air outlet is connected to the air inlet of the corresponding connection port, and the third air outlet is connected to the air inlet of the connection block. The air outlet of the connecting block is connected to the air inlet of the proportional valve; The proportional valve power supply board is used to supply power to the corresponding proportional valve.

[0009] In some implementations, the proportional valve is made of stainless steel and contains a leaf spring made of annealed magnetic material.

[0010] In some implementations, the intelligent conversion output module includes multiple connecting pipes, a motherboard, a processor, and multiple intelligent sensor sub-modules; The air inlet of each connecting pipe is connected to the air outlet of the corresponding connecting port, and the air outlet is connected to the air inlet of the corresponding intelligent sensor submodule. Each intelligent sensor submodule and processor is electrically connected to the motherboard; Each intelligent sensor submodule is used to measure the pressure difference signal between each first air blowing tube and transmit the pressure difference signal to the processor; The processor is used to calculate the target variable parameters of the liquid in the measured tank based on the differential pressure signal.

[0011] In some implementations, the intelligent conversion output module further includes: a Foundation Fieldbus (FF) bus control board and a display control board; the intelligent air blowing instrument also includes an electrical interface mounted on the instrument housing; Both the FF bus control board and the display control board are electrically connected to the motherboard; The display screen is integrated into the control board. The display control board is used to control the display screen to perform corresponding displays based on the processor's display instructions; The FF bus control board is connected to the electrical interface via the motherboard's circuitry; the electrical interface is used to connect the external power supply and the FF bus network.

[0012] In some implementations, the smart sensor submodule uses a differential pressure sensor.

[0013] In some implementations, it also includes: an expansion interface, display buttons, and mounting brackets disposed on the instrument housing; The expansion interface connects to the motherboard in the intelligent conversion output module; The expansion interface is used to connect to external calibration equipment or other intelligent unit instruments.

[0014] In some implementations, it also includes: an alarm module; the alarm module is electrically connected to the motherboard; The alarm module is used to issue an alarm signal when the target variable parameter exceeds the set threshold.

[0015] In some implementations, the instrument enclosure has an IP66 protection rating; the length, width, and height of the instrument enclosure are 284 mm, 218 mm, and 138 mm, respectively.

[0016] The intelligent air blowing instrument provided according to the embodiments of this application includes: an instrument housing, an air source interface, a filter and pressure reducing valve, an intelligent gas flow controller, an intelligent conversion output module, and multiple air blowing interfaces; the air source interface, the filter and pressure reducing valve, and each air blowing interface are disposed on the instrument housing; the intelligent gas flow controller and the intelligent conversion output module are disposed inside the instrument housing. The intelligent gas flow controller is used to adjust the flow rate of the received compressed air and distribute the output to the intelligent conversion output module and each air blowing interface; the intelligent conversion output module is used to measure the pressure difference signal between each first air blowing pipe and calculate the target variable parameter of the liquid in the measured tank based on the pressure difference signal. The intelligent air blowing instrument of this embodiment replaces the traditional design of a flow stabilizing valve and a float flow meter with an intelligent gas flow controller and an intelligent conversion output module, eliminating the need for manual adjustment components and enabling intelligent control of the gas flow rate, thus achieving precise control of the gas flow rate. This improves the measurement efficiency of the target variable parameter of the liquid in the measured tank. Attached Figure Description

[0017] Figure 1 A schematic diagram illustrating the principle of the intelligent air blowing instrument provided in the embodiments of this application is shown; Figure 2 This diagram illustrates the overall structure of the intelligent air blowing instrument provided in an embodiment of this application. Figure 3 This diagram shows the internal structure of the intelligent air blowing instrument provided in an embodiment of this application; Figure 4 This paper shows a schematic diagram of the structure of the intelligent gas flow controller provided in an embodiment of this application; Figure 5 This paper shows a schematic diagram of the flow controller provided in an embodiment of this application; Figure 6 This diagram illustrates the structure of the intelligent conversion output module provided in an embodiment of this application. Symbol explanation: 1. Air source interface; 2. Filter pressure reducing valve; 3. Air blowing interface; 4. Expansion interface; 5. Electrical interface; 6. Display screen button; 7. Mounting bracket; 8. Nameplate; 9. Intelligent measurement module; 10. Intelligent conversion output module; 11. Second air blowing pipe; 12. Air inlet block; 13. Flow controller; 14. Proportional valve power board; 15. Connection port; 16. Proportional valve; 17. Connection block; 18. Valve seat; 19. Connection pipe; 20. Main board; 21. FF bus control board; 22. Display screen control board; 23. Intelligent sensor sub-module. Detailed Implementation

[0018] To enable those skilled in the art to better understand the technical solutions of this application, the application will be further described in detail below with reference to the accompanying drawings and embodiments.

[0019] The features and exemplary embodiments of various aspects of this application will now be described in detail. To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only configured to explain this application and are not configured to limit this application. For those skilled in the art, this application can be implemented without some of these specific details. The following description of the embodiments is merely to provide a better understanding of this application by illustrating examples of this application.

[0020] It should be noted that, in this document, relational terms such as first and second, A, B, and C, etc., are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0021] Currently, the air blowing instrument blows out compressed gas with a stable pressure and flow rate through an air blowing tube. This gas overflows from the lower end of the air blowing tube inserted into the device under test, forming continuous, uniform, and stable bubbles. Because the amount of bubbles at the lower end of the air blowing tube is minute and the gas flow rate is low, the air loss along the blowing tube is negligible. Therefore, in actual measurements, the gas pressure inside the air blowing tube is almost equal to the static pressure of the liquid level at the lower end of the air blowing tube. By detecting the differential pressure signal between the air blowing tubes, the air blowing instrument can measure variable parameters such as the liquid level, density, interface, and column weight of the measuring vessel.

[0022] Traditional gas blowing instruments consist of a purely mechanical, manually adjustable float flowmeter module and an analog differential pressure measurement unit, resulting in a low level of intelligence. They suffer from adjustment lag and low measurement efficiency.

[0023] Example 1

[0024] like Figure 1 As shown, the intelligent air-blowing instrument is designed based on the "air-blowing method" principle of the air-blowing device, and its overall design features intelligence, digitalization, and integration. The overall structure of the intelligent air-blowing instrument can be divided into two main modules: intelligent measurement and intelligent conversion output.

[0025] like Figure 2 and Figure 3As shown, the two main modules, intelligent measurement and intelligent conversion output, are located on the instrument housing and inside the instrument housing. The intelligent measurement module 9 consists of the filter pressure reducing valve 2 and the intelligent gas flow controller (…). Figure 3 It consists of the part directly connected by the line in the middle 9.

[0026] The intelligent conversion output module 10 consists of an intelligent gas sensor module, an amplifier module, an AD converter, a CPU (Central Processing Unit) chip, and a power processing module. It converts changes in gas pressure into a 4-20mA DC current signal. The measurement circuit adopts a plug-in printed circuit board structure design.

[0027] The principle of the intelligent air blowing instrument in this embodiment is as follows: the air inlet, i.e., the air source interface 1, transmits compressed gas to the filter and pressure reducing valve 2, and then transmits it to the intelligent conversion output module 10 via the intelligent gas flow controller. The intelligent conversion output module 10 can convert the change in gas pressure into a 4-20mA DC (Direct Current) current signal.

[0028] The intelligent air blowing instrument provided in this application embodiment may include the following structure: The instrument housing, air source interface 1, filter pressure reducing valve 2, intelligent gas flow controller, intelligent conversion output module 10, and multiple air blowing interfaces 3.

[0029] The gas source interface 1, filter pressure reducing valve 2, and various air blowing interfaces 3 are located on the instrument box. The intelligent gas flow controller and intelligent conversion output module 10 are located inside the instrument box.

[0030] The outlet of gas source interface 1 is connected to the inlet of filter pressure reducing valve 2. The outlet of filter pressure reducing valve 2 is connected to the first terminal of the intelligent gas flow controller.

[0031] The second end of the intelligent gas flow controller is connected to the air inlet of each blowing interface 3, and the third end is connected to the intelligent conversion output module 10.

[0032] The air inlet of air source interface 1 is connected to an air source, and the air outlet of each air blowing interface 3 is connected to the first air blowing pipe of the liquid tank being tested.

[0033] The air source interface 1 is used to transmit compressed air to the intelligent gas flow controller after the compressed air is reduced in pressure by the filter pressure reducing valve 2.

[0034] The intelligent gas flow controller is used to regulate the flow rate of the received compressed air and distribute the output to the intelligent conversion output module 10 and each air blowing interface 3.

[0035] The intelligent conversion output module 10 is used to measure the pressure difference signal between each first air blowing pipe and to calculate the target variable parameters of the liquid in the measured tank based on the pressure difference signal.

[0036] For example, clean and stable compressed air enters the filter and pressure reducing valve 2 through the air source interface 1, and after being reduced to a suitable pressure, it enters the intelligent gas flow controller. The intelligent gas flow controller intelligently adjusts and controls the compressed air flow rate, outputting a stable gas flow rate, which is evenly distributed to the air blowing interface 3. The air blowing interface 3 is connected to the air blowing pipe at the user's site. Finally, the gas with a stable flow rate overflows from the lower end of the air blowing pipe inserted into the device under test, producing continuous, uniform, and stable bubbles. These bubbles are discharged into the atmosphere in the measuring tank through the liquid.

[0037] For example, a smart gas flow controller includes automatically measuring devices, such as a proportional valve, a proportional valve power supply board, etc.

[0038] For example, the intelligent conversion output module 10 includes a connector, a motherboard, a processor, multiple intelligent sensor sub-modules, a power processing module, etc. The intelligent sensor sub-modules include an amplifier module, an AD converter (Analog-to-Digital Converter), etc.

[0039] For example, the circuit in the intelligent conversion output module 10 adopts a plug-in printed circuit board structure design.

[0040] For example, the number of air blowing ports 3 can be set according to actual needs, such as 3 ports.

[0041] For example, the air blowing port 3 can be located at the bottom of the instrument box, and the air source port 1 and the filter pressure reducing valve 2 can be located on the side of the instrument box near the bottom.

[0042] The instrument box can be divided into two areas, namely the first area and the second area. The first area is used to install the intelligent gas flow controller, and the second area is used to install the intelligent conversion output module 10.

[0043] For example, the first area is located at the bottom of the instrument panel, and the second area is located at the top of the instrument panel.

[0044] For example, when the intelligent gas flow controller adjusts the flow rate of the received compressed air, it ensures that the compressed air is stably and evenly distributed and output to the intelligent conversion output module 10 and each air blowing port 3. This creates multiple airflow channels between the intelligent conversion output module 10 and each air blowing port 3, with the number of airflow channels matching the number of air blowing ports 3.

[0045] For example, target variable parameters include liquid level, density, interface, column weight, etc.

[0046] The intelligent air blowing instrument provided according to the embodiments of this application includes: an instrument housing, an air source interface 1, a filter and pressure reducing valve 2, an intelligent gas flow controller, an intelligent conversion output module 10, and multiple air blowing interfaces 3. The air source interface 1, the filter and pressure reducing valve 2, and each air blowing interface 3 are mounted on the instrument housing. The intelligent gas flow controller and the intelligent conversion output module 10 are mounted inside the instrument housing. The intelligent gas flow controller is used to adjust the flow rate of the received compressed air and distribute the output to the intelligent conversion output module 10 and each air blowing interface 3. The intelligent conversion output module 10 is used to measure the pressure difference signal between each first air blowing pipe and calculate the target variable parameter of the liquid in the measured tank based on the pressure difference signal. The intelligent air blowing instrument of this embodiment replaces the traditional design of a flow stabilizing valve and a float flow meter with an intelligent gas flow controller and an intelligent conversion output module 10. It eliminates the need for manually adjustable parts and can intelligently control the gas flow rate, achieving precise control of the gas flow. This improves the measurement efficiency of the target variable parameter of the liquid in the measured tank.

[0047] Example 2

[0048] like Figures 4 to 6 As shown, the intelligent air blowing instrument provided in this application embodiment is further described based on the intelligent air blowing instrument provided in embodiment 1 of this application.

[0049] The intelligent gas flow controller includes: an air inlet block 12, multiple second air blowing pipes 11, multiple flow control sub-modules, and multiple connection ports 15.

[0050] There is a one-to-one correspondence between the second air blowing pipe 11, the flow control submodule, and the connection port 15.

[0051] The air inlet of the air inlet block 12 is connected to the air outlet of the filter pressure reducing valve 2, and the air outlet is connected to the air inlet of each flow control submodule.

[0052] The first air outlet of each flow control submodule is connected to the air inlet of the corresponding second air blowing pipe 11.

[0053] The second air outlet of each flow control submodule is connected to the air inlet of the corresponding connection port 15.

[0054] The air outlet of each connection port 15 is connected to the air inlet of the intelligent conversion output module 10.

[0055] The air outlet of each second air blowing pipe 11 is connected to the air inlet of the corresponding air blowing interface 3.

[0056] Each flow control submodule is used to adjust the flow rate of the received compressed air and distribute the output to the corresponding second air blowing pipe 11 and the corresponding connection port 15.

[0057] For example, the number of the second air blowing pipe 11, the flow control submodule, and the connection port 15 are all the same. Correspondingly, the second air blowing pipe 11, the flow control submodule, and the connection port 15 form an airflow channel.

[0058] In some implementations, the flow control submodule includes: multiple flow controllers 13 and multiple proportional valve power boards 14.

[0059] The flow controller 13, the second air blowing pipe 11, and the proportional valve power supply board 14 are in one-to-one correspondence.

[0060] The flow controller 13 includes a proportional valve 16, a connecting block 17, and a valve seat 18.

[0061] The proportional valve 16 is fixedly connected to the valve seat 18 via the connecting block 17.

[0062] The air inlet of valve seat 18 is connected to the air outlet of air inlet block 12, the first air outlet is connected to the air inlet of the corresponding second air blowing pipe 11, the second air outlet is connected to the air inlet of the corresponding connection port 15, and the third air outlet is connected to the air inlet of connection block 17.

[0063] The air outlet of the connecting block 17 is connected to the air inlet of the proportional valve 16.

[0064] The proportional valve power supply board 14 is used to supply power to the corresponding proportional valve 16.

[0065] For example, the number of flow controllers 13 and proportional valve power boards 14 are the same.

[0066] In this embodiment, the opening degree of the proportional valve 16 can be controlled by controlling the voltage output of the proportional valve 16, thereby controlling the air flow rate.

[0067] In some embodiments, the proportional valve 16 is made of stainless steel and has an internal leaf spring made of annealed magnetic material.

[0068] For example, the proportional valve 16 can be a miniature proportional solenoid valve, which is compact in size and made of stainless steel, suitable for various corrosive gases. It contains an annealed magnetic material leaf spring to resolve flow fluctuations caused by vibrations due to radial oscillation and friction of the internal valve core. Simultaneously, the magnetic yoke used undergoes special annealing treatment to eliminate magnetic flux flow path interference, thereby improving magnetic force, extending the service life of the proportional valve 16, and providing more precise control of gas flow.

[0069] In some implementations, the intelligent conversion output module 10 includes multiple connecting pipes 19, a motherboard 20, a processor, and multiple intelligent sensor sub-modules 23.

[0070] The air inlet of each connecting pipe 19 is connected to the air outlet of the corresponding connecting port 15, and the air outlet is connected to the air inlet of the corresponding intelligent sensor submodule 23.

[0071] Each intelligent sensor submodule 23 and the processor are electrically connected to the motherboard 20.

[0072] Each intelligent sensor submodule 23 is used to measure the pressure difference signal between each first air blowing tube and transmit the pressure difference signal to the processor.

[0073] The processor is used to calculate the target variable parameters of the liquid in the measured tank based on the differential pressure signal.

[0074] For example, the smart sensor submodule 23 includes a sensor, an amplifier module, an AD converter, etc.

[0075] In some implementations, the intelligent conversion output module 10 further includes a Foundation Fieldbus (FF) bus control board 21 and a display control board 22. The intelligent air blowing instrument also includes an electrical interface 5 disposed on the instrument housing.

[0076] Both the FF bus control board 21 and the display control board 22 are electrically connected to the motherboard 20.

[0077] The display screen is integrated on the display control board 22.

[0078] The display control board 22 is used to control the display screen to perform corresponding displays based on the processor's display instructions.

[0079] The FF bus control board 21 is connected to the electrical interface 5 via the circuitry of the main board 20. The electrical interface 5 is used to connect the external power supply and the FF bus network.

[0080] For example, the FF bus control board 21 is connected to the electrical interface 5 through the circuit of the motherboard 20, thereby connecting to an external power supply and external communication equipment through the electrical interface 5 to realize remote control function. Remote control is possible in air blowing measurement environments where it is inconvenient for commissioning personnel to enter, reducing the workload of user installation, inspection, and maintenance.

[0081] The display screen can show the measurement data, allowing users to understand the measurement situation more intuitively.

[0082] In some implementations, the smart sensor submodule 23 uses a differential pressure sensor.

[0083] The intelligent sensor submodule 23 uses a precision pressure sensor, which is small in size and can be directly installed on the main unit as a connector, making installation and debugging convenient.

[0084] In some implementations, it also includes: an expansion interface 4, a display button 6, and a mounting bracket 7 disposed on the instrument housing.

[0085] The expansion interface 4 is connected to the motherboard 20 in the intelligent conversion output module 10.

[0086] Expansion interface 4 is used to connect external calibration equipment or other intelligent unit instruments.

[0087] For example, expansion interface 4 is an external expansion interface of the intelligent air blowing instrument, which can be used for the verification of the sensor in the intelligent conversion output module 10, and as an external expansion interface for the intelligent air blowing instrument to combine with other intelligent unit instruments.

[0088] In some implementations, an alarm module is also included. The alarm module is electrically connected to the motherboard 20.

[0089] The alarm module is used to issue an alarm signal when the target variable parameter exceeds the set threshold.

[0090] For example, the alarm module can be an audible and visual alarm device. The threshold value can be set according to the actual application requirements.

[0091] In some implementations, the instrument enclosure has an IP (Ingress Protection) rating of 66. The instrument enclosure's external dimensions are 284 mm (length) x 218 mm (width) x 138 mm (height).

[0092] For example, the modules within the instrument enclosure feature a modular design, resulting in a compact structure and excellent sealing. The IP66 protection rating of the instrument enclosure enhances its service life and reliability. The enclosure's dimensions (length x width x height) are 284 x 218 x 138 mm, roughly the size of an A4 sheet of paper, minimizing its footprint and facilitating efficient on-site installation.

[0093] The intelligent gas blowing instrument in this embodiment uses an intelligent gas flow controller to replace the traditional design of a flow stabilizing valve and a float flow meter. It has no manually adjustable parts. By combining with sensors, processors, etc. in the intelligent conversion output module 10, it can intelligently control the gas flow rate (for example, the processor is pre-configured with the corresponding control algorithm), realize precise control of the gas flow rate, and has the functions of remote adjustment and display of gas flow rate.

[0094] The intelligent air blowing instrument in this embodiment uses a high-performance intelligent sensor for measuring gas pressure (differential pressure). It has superior electrical performance compared to capacitive pressure sensors, is minimally affected by temperature, and features miniaturization, high sensitivity, low power consumption, high stability, and high reliability.

[0095] The intelligent air-blowing instrument in this embodiment features digital calculation and display functions, intelligent control functions, and, especially, remote operation in air-blowing measurement environments where it is inconvenient for commissioning personnel to enter, reducing the workload of users in installation, inspection, and maintenance. The entire unit is convenient and quick to install and maintain, has stable and reliable performance, a high level of intelligence, and an accuracy class of up to 0.5.

[0096] The intelligent air-blowing instrument in this embodiment features a modular design, resulting in a compact structure, excellent sealing, and an IP66 protection rating for the entire casing. Its dimensions are equivalent to the size of an A4 sheet of paper, minimizing its on-site installation space and facilitating user space layout.

[0097] Example 3

[0098] To better understand the intelligent air blowing instrument provided in the embodiments of this application, an exemplary description is given below in conjunction with a specific application implementation.

[0099] The intelligent air blowing instrument in this embodiment has intelligent and digital functions, high accuracy, and compact structure, which solves the problems of large installation space, inconvenient debugging and maintenance, and low accuracy of previous air blowing measurement systems.

[0100] like Figure 1 As shown, Figure 1 This is a schematic diagram of the intelligent air-blowing instrument in this embodiment. The air inlet, i.e., the air source interface 1, transmits compressed gas to the filter and pressure reducing valve 2, and then to the intelligent conversion output module 10 via the intelligent gas flow controller. The intelligent conversion output module 10 (e.g., an amplifier module, an AD converter, a CPU chip, a power processing module, etc.) can convert changes in gas pressure into a 4-20mA DC current signal. The intelligent air-blowing instrument is designed based on the "air-blowing method" principle of the air-blowing device, and the overall design features intelligence, digitalization, and integration. The overall structure of the intelligent air-blowing instrument can be divided into two main modules: intelligent measurement and intelligent conversion output.

[0101] The two main modules, intelligent measurement and intelligent conversion output, are located on the instrument housing and inside the instrument housing. The intelligent measurement module 9 consists of a filter pressure reducing valve 2 and an intelligent gas flow controller.

[0102] The intelligent conversion output module 10 consists of an intelligent gas sensor module, an amplifier module, an AD converter, a CPU (Central Processing Unit) chip, and a power processing module. It converts changes in gas pressure into a 4-20mADC current signal. The measurement circuit adopts a plug-in printed circuit board structure design.

[0103] like Figure 2 As shown, Figure 2 This is a schematic diagram of the overall structure of the intelligent air blowing instrument in this embodiment. Figure 3 As shown, Figure 3 This is a schematic diagram of the internal structure of the intelligent air-blowing instrument in this embodiment. The intelligent air-blowing instrument mainly consists of an instrument housing, an air source interface 1, a filter and pressure reducing valve 2 (circles in the diagram represent pressure gauges in MPa), an air-blowing interface 3, an expansion interface 4, an electrical interface 5, a display screen and buttons 6, mounting brackets 7, a nameplate 8, an intelligent measurement module 9, and an intelligent conversion output module 10. Among these, for example... Figure 2 As shown, 18.005mA corresponds to a high alarm value (AH), 18.001mA corresponds to a high alarm value (AH), and 4.002mA corresponds to a low alarm value (AL).

[0104] The instrument enclosure features a modular design, resulting in a compact structure and excellent sealing. Its IP66 protection rating enhances service life and reliability. Measuring 284 x 218 x 138 mm (length x width x height), the enclosure is roughly the size of an A4 sheet of paper, minimizing its footprint and facilitating efficient on-site installation.

[0105] Clean, stable compressed air enters the filter and pressure reducing valve 2 through the air source interface 1. After being reduced to a suitable pressure by the filter and pressure reducing valve 2, it is transmitted to the intelligent gas flow controller. The intelligent gas flow controller intelligently adjusts and controls the compressed air flow rate, outputting a stable gas flow rate, which is evenly distributed to the air blowing interface 3. The air blowing interface 3 is connected to the air blowing pipe at the user's site. Finally, the stable flow of gas overflows from the lower end of the air blowing pipe inserted into the device under test, producing continuous, uniform, and stable bubbles. These bubbles are then discharged into the atmosphere in the measuring tank through the liquid.

[0106] The intelligent conversion output module 10 measures the pressure difference signal between the air blowing pipes and, through its calculation function, outputs and displays variable parameters such as liquid level, density, interface, and column weight in the measured tank on the display screen. These parameters can also be transmitted via FF bus technology. Furthermore, the intelligent air blowing instrument has an automatic alarm function; when the variable parameters exceed preset thresholds, it can directly issue audible and visual alarm signals and remotely transmit the alarm signals for display.

[0107] The intelligent air-blowing instrument has four main external interfaces: air source interface 1, air-blowing interface 3, expansion interface 4, and electrical interface 5. Air source interface 1 connects to the air source; a stable and clean air source is essential for the instrument's operation. Air-blowing interface 3 is a crucial interface for connecting the air-blowing pipe to the liquid tank being tested at the user's site. Both air source interface 1 and air-blowing interface 3 can be designed with appropriate dimensions according to the specific requirements of the user's site. Expansion interface 4 is an external expansion interface for the intelligent air-blowing instrument, used for calibrating the intelligent sensors in the intelligent conversion output module 10, and for combining the intelligent air-blowing instrument with other intelligent unit instruments. Electrical interface 5 is the electrical connection interface for the intelligent air-blowing instrument.

[0108] like Figure 4 As shown, Figure 4 This is a schematic diagram of the structure of the intelligent gas flow controller provided in an embodiment of this application. Figure 5 As shown, Figure 5 This diagram illustrates the structure of a flow controller provided in an embodiment of this application. The intelligent gas flow controller mainly consists of a second air blowing pipe 11, an air inlet block 12, a flow controller 13, a proportional valve power supply board 14, and a connection port 15. The flow controller 13 consists of a proportional valve 16, a connection block 17, and a valve seat 18.

[0109] In the intelligent gas flow controller, each second air blowing pipe 11 corresponds to a flow controller 13 and a proportional valve power board 14. Compressed air entering from the air inlet block 12 is intelligently controlled by the flow controller 13 to achieve precise control of the gas flow rate, outputting a stable gas flow rate, which is then evenly distributed to each second air blowing pipe 11 and the connection port 15. The connection port 15 is connected to the intelligent conversion output module 10.

[0110] The intelligent gas flow controller has no manually adjustable parts and features a modular design, making it compact and easy to install and maintain. With few moving parts, it offers stable and reliable performance. The gas flow rate can also be remotely and intelligently adjusted based on real-time measurement requirements of the liquid tank being measured at the user's location.

[0111] The proportional valve 16 in the flow controller 13 is compact, a miniature proportional solenoid valve made of stainless steel, suitable for various corrosive gases. The proportional valve 16 contains a leaf spring specially designed with annealed magnetic material, which perfectly solves the flow fluctuations caused by vibrations due to radial oscillation and friction of the internal valve core. Its magnetic yoke undergoes special annealing treatment to eliminate magnetic flux flow path interference problems, while simultaneously improving magnetic force, service life, and the intelligent precision of gas flow control.

[0112] The internal air passages of the connecting block 17 and valve seat 18 are reasonable and ingenious, with reliable sealing. Furthermore, the modular design makes replacement and maintenance more convenient and quick.

[0113] like Figure 6 As shown, Figure 6 This is a schematic diagram of the intelligent conversion output module of the intelligent air blowing instrument in this embodiment.

[0114] The intelligent conversion output module 10 mainly consists of a connecting pipe 19, a main board 20, an FF bus control board 21, a display control board 22, and an intelligent sensor sub-module 23.

[0115] The intelligent conversion output module 10 features digital calculation and display functions, as well as intelligent detection and control functions, converting the detected pressure signal into an electrical signal. The FF bus function enables remote control in air blowing measurement environments where it is inconvenient for commissioning personnel to access, reducing the workload of user installation, inspection, and maintenance.

[0116] The intelligent sensor submodule 23 uses a precision intelligent gas pressure (differential pressure) sensor. It is compact and can be directly mounted on the circuit board as a connector, making installation and debugging convenient. The intelligent sensor detects the differential pressure signal between the air blowing pipes, and its output pressure automatically changes with the pressure at the outlet of the air blowing pipe. By measuring the pressure difference between the air blowing pipes, the relevant liquid level parameters of the measuring tank can be determined.

[0117] The intelligent air-blowing instrument in this embodiment is designed based on the "air-blowing method" principle. Structurally, it mainly includes an intelligent pressure (differential pressure) sensor detection element, an intelligent gas flow detection and control flow controller, an integrated circuit board, an intelligent human-machine interface, a communication module supporting FF bus technology, and an integrated module connecting various components and pipelines. The intelligent air-blowing instrument, together with a gas source and a pressure reducing valve with filtration function, forms an air-blowing measurement system. It can measure variables such as liquid level, density, and interface in open or closed containers. It can also be combined with other unit instruments or industrial control computers to form industrial automation systems for detection, recording, and control, and is particularly suitable for intelligent, remotely controlled liquid level measurement.

[0118] Gas blowing instruments are mostly used in environments with moderate levels of radioactivity (or alkalinity), making non-contact measurement difficult for personnel to access the equipment room. The intelligent gas blowing instrument in this embodiment features a display function and allows for remote control and flow adjustment, significantly reducing the workload of on-site operators. Furthermore, its compact size and high accuracy offer significant advantages, making it more suitable for gas blowing measurement systems requiring precise measurements. Besides its widespread use in measuring various low-radioactive liquids in the nuclear industry, intelligent gas blowing instruments can also be widely applied in petrochemical, pesticide, and shipbuilding industries.

[0119] It is understood that the various method embodiments mentioned above in this application can be combined with each other to form combined embodiments without violating the principle and logic. Due to space limitations, this disclosure will not elaborate further. Those skilled in the art will understand that in the above methods of specific implementation, the specific execution order of each step should be determined by its function and possible internal logic.

[0120] It is understood that the above embodiments are merely exemplary implementations used to illustrate the principles of this application, and this application is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and substance of this application, and these modifications and improvements are also considered to be within the scope of protection of this application.

Claims

1. An intelligent air blowing instrument, characterized in that, include: Instrument housing, air source interface, filter pressure reducing valve, intelligent gas flow controller, intelligent conversion output module and multiple air blowing interfaces; The gas source interface, the filter pressure reducing valve, and each of the air blowing interfaces are mounted on the instrument housing; the intelligent gas flow controller and the intelligent conversion output module are mounted inside the instrument housing. The outlet of the gas source interface is connected to the inlet of the filter pressure reducing valve; the outlet of the filter pressure reducing valve is connected to the first end of the intelligent gas flow controller. The second end of the intelligent gas flow controller is connected to the air inlet of each of the blowing interfaces, and the third end is connected to the intelligent conversion output module. The air inlet of the air source interface is connected to the air source, and the air outlet of each of the air blowing interfaces is connected to the first air blowing pipe of the liquid tank being tested. The gas source interface is used to transmit compressed air to the intelligent gas flow controller after the compressed air is reduced in pressure by the filter and pressure reducing valve. The intelligent gas flow controller is used to adjust the flow rate of the received compressed air and distribute the output to the intelligent conversion output module and each of the air blowing ports; The intelligent conversion output module is used to measure the pressure difference signal between each of the first air blowing pipes, and to calculate the target variable parameters of the liquid in the measured tank based on the pressure difference signal.

2. The intelligent air blowing instrument according to claim 1, characterized in that, The intelligent gas flow controller includes: an air inlet block, multiple second air blowing pipes, multiple flow control sub-modules, and multiple connection ports; There is a one-to-one correspondence between the second air blowing tube, the flow control submodule, and the connection port; The air inlet of the air inlet block is connected to the air outlet of the filter pressure reducing valve, and the air outlet is connected to the air inlet of each of the flow control sub-modules respectively. The first air outlet of each flow control submodule is connected to the air inlet of the corresponding second air blowing pipe; The second air outlet of each flow control submodule is connected to the air inlet of the corresponding connection port; The air outlet of each of the aforementioned connection ports is connected to the air inlet of the intelligent conversion output module; The air outlet of each of the second air blowing pipes is connected to the air inlet of the corresponding air blowing interface; Each of the flow control submodules is used to adjust the flow rate of the received compressed air and distribute the output to the corresponding second air blowing pipe and the corresponding connection port.

3. The intelligent air blowing instrument according to claim 2, characterized in that, The flow control submodule includes: multiple flow controllers and multiple proportional valve power supply boards; There is a one-to-one correspondence between the flow controller, the second air blowing pipe, and the proportional valve power board; The flow controller includes a proportional valve, a connecting block, and a valve seat; The proportional valve is fixedly connected to the valve seat via the connecting block; The air inlet of the valve seat is connected to the air outlet of the air inlet block, the first air outlet is connected to the air inlet of the corresponding second air blowing pipe, the second air outlet is connected to the air inlet of the corresponding connection port, and the third air outlet is connected to the air inlet of the connection block. The air outlet of the connecting block is connected to the air inlet of the proportional valve; The proportional valve power supply board is used to supply power to the corresponding proportional valve.

4. The intelligent air blowing instrument according to claim 3, characterized in that, The proportional valve is made of stainless steel and has a leaf spring inside, which is made of annealed magnetic material.

5. The intelligent air blowing instrument according to claim 2, characterized in that, The intelligent conversion output module includes multiple connecting pipes, a motherboard, a processor, and multiple intelligent sensor sub-modules; The air inlet of each of the connecting pipes is connected to the air outlet of the corresponding connecting port, and the air outlet is connected to the air inlet of the corresponding intelligent sensor submodule. Each of the aforementioned smart sensor sub-modules and the processor are electrically connected to the motherboard; Each of the aforementioned intelligent sensor submodules is used to measure the pressure difference signal between each of the first air blowing tubes and transmit the pressure difference signal to the processor; The processor is used to calculate the target variable parameters of the liquid in the measured tank based on the differential pressure signal.

6. The intelligent air blowing instrument according to claim 5, characterized in that, The intelligent conversion output module also includes: a Foundation Fieldbus (FF) bus control board and a display screen control board; the intelligent air blowing instrument also includes an electrical interface disposed on the instrument housing; Both the FF bus control board and the display screen control board are electrically connected to the motherboard. The display screen is integrated on the display screen control board; The display control board is used to control the display screen to perform corresponding displays based on the display instructions of the processor; The FF bus control board is connected to the electrical interface via the circuitry of the motherboard; the electrical interface is used to connect an external power supply and the FF bus network.

7. The intelligent air blowing instrument according to claim 6, characterized in that, The intelligent sensor submodule uses a differential pressure sensor.

8. The intelligent air blowing instrument according to claim 7, characterized in that, Also includes: The expansion interface, display button and mounting bracket are provided on the instrument box; The expansion interface is connected to the motherboard in the intelligent conversion output module; The expansion interface is used to connect to external calibration equipment or other intelligent unit instruments.

9. The intelligent air blowing instrument according to claim 6, characterized in that, Also includes: Alarm module; the alarm module is electrically connected to the motherboard; The alarm module is used to issue an alarm signal when the target variable parameter exceeds a set threshold.

10. The intelligent air blowing instrument according to claim 6, characterized in that, The instrument enclosure has an IP66 protection rating; the length, width, and height of the instrument enclosure are 284 mm, 218 mm, and 138 mm, respectively.

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