Pressure-volume monitoring device for non-metal gasket leakage experiment

Abstract

The invention relates to a pressure-volume monitoring device for a non-metal gasket leakage experiment, and belongs to the technical field of sealing testing, the pressure-volume monitoring device comprises a gas supply mechanism, the output interface of which is connected with the gas inlet of a gas storage tank to provide an inert gas source; the signal acquisition end of the pressure measuring mechanism is embedded into the lower end of the non-metal gasket so as to acquire a gas pressure signal; the input end of the drainage measuring mechanism is connected with the exhaust port of the gas storage tank, and the drainage measuring mechanism is used for representing the volume of leaked inert gas through liquid level changes. The gas pressure change is monitored in real time through the pressure measuring mechanism, the leaked inert gas volume is represented through the liquid level change of the drainage measuring mechanism, the complex measuring process is simplified into visual liquid discharge amount, direct quantification of the leaked gas volume is achieved, and the detection accuracy is improved. Therefore, traditional pressure attenuation indirect calculation is converted into pressure-volume direct measurement, the influence of pipeline pressure drop on the measurement precision is avoided, and the measurement precision is improved.

Description

Technical Field

[0001] The present application relates to the technical field of sealing testing, and in particular to a pressure-volume monitoring device for non-metallic gasket leakage testing. Background Art

[0002] Non-metallic gaskets are sheet-like components made of non-metallic materials and used to seal joints in pipes, containers, and equipment interfaces to prevent leakage of media (such as gas, liquid, and dust). Their core function is to fill tiny gaps in joints through elastic deformation, forming a sealed barrier. They are widely used in industries such as chemical, energy, food, and medicine.

[0003] Testing the leakage performance of non-metallic gaskets is not only a technical quality control, but also a safety guarantee for the entire chain of industrial systems from design to operation.

[0004] Traditional pressure-volume monitoring devices used for non-metallic gasket leakage testing typically use a pressure decay model for pressure monitoring and volume calculation. This involves monitoring the time-dependent pressure decay within a closed system and indirectly inferring the leaked gas volume using the ideal gas state equation. However, this measurement method is susceptible to reduced accuracy due to pressure drop in the pipeline. Summary of the Invention

[0005] In order to solve or partially solve the problems existing in the related art, the present application provides a pressure-volume monitoring device for non-metallic gasket leakage experiments.

[0006] To achieve the above objectives, this application is implemented through the following technical solutions: A pressure-volume monitoring device for non-metallic gasket leakage testing includes a test chamber, an air storage box, and a fixture, wherein the fixture is provided with a non-metallic gasket. The pressure-volume monitoring device for non-metallic gasket leakage testing also includes: an air supply mechanism, the output interface of which is connected to the air inlet of the air storage box to provide an inert gas source; A pressure measuring mechanism, wherein a signal collecting end thereof is embedded in the lower end of the non-metallic gasket to obtain a gas pressure signal; The drainage measuring mechanism has an input end connected to the exhaust port of the gas storage tank and is used to characterize the volume of leaked inert gas through changes in liquid level.

[0007] Optionally, the fixture is connected through a rotating shaft inside the test cavity, the fixture includes an upper fixture and a lower fixture, the signal acquisition end includes a measuring diaphragm and a pressure sensor probe, the non-metallic gasket is clamped between the upper fixture and the lower fixture, the measuring diaphragm is arranged at the lower end of the non-metallic gasket, and the pressure sensor probe is connected to the measuring diaphragm.

[0008] Optionally, the pressure measurement mechanism further includes a control module and a display module, the pressure sensor is electrically connected to the input end of the control module via a signal transmission cable, and the output end of the control module is electrically connected to the input end of the display module.

[0009] Optionally, the drainage measurement mechanism includes: A base is provided at the upper end of the base, wherein a quantitative liquid is pre-placed in the measuring cylinder, one end of the scale is connected to the opening of the measuring cylinder through a rubber stopper, the other end of the scale is connected to the exhaust terminal, and the exhaust terminal is connected to the exhaust port of the air storage box.

[0010] Optionally, the air supply mechanism includes: A fixed bracket is provided with a gas cylinder body, an output interface of the gas cylinder body is threadedly connected to a gas cylinder valve, a pressure reducing valve, a pressure gauge and a flow meter are sequentially installed downstream of the gas cylinder valve, and the output interface is connected to the gas inlet of the gas storage box through a hose.

[0011] Optionally, an ultrasonic water level measuring mechanism is further included, and the ultrasonic water level measuring mechanism includes: An ultrasonic water level sensor probe, the ultrasonic water level sensor probe being electrically connected to a circuit board via a signal transmission line, the circuit board being integrated with a display, an MP3 player module, a speaker, a power button, a reset button, and a power button; Among them, the ultrasonic water level sensor probe is vertically installed at the bottom of the measuring cylinder to transmit ultrasonic signals to the liquid surface in the measuring cylinder and receive reflected signals. The MP3 player module is connected to the speaker through an audio signal line to trigger the voice broadcast of the speaker according to the ultrasonic signal of the ultrasonic water level sensor probe.

[0012] Optionally, a hydraulic loading mechanism is further included, and the hydraulic loading mechanism includes: A hydraulic cylinder, wherein the axial upper end of the piston rod of the hydraulic cylinder is threadedly connected to a support head, the support head is connected to the upper clamp and aligned with it, the hydraulic cylinder is provided with a handle, and the hydraulic cylinder is connected to the air tank through a pipeline, and the air tank is provided with an oil return button.

[0013] Optionally, casters are provided on the bottom of the fixing bracket and the air storage box.

[0014] Beneficial effects of the present application: The present application monitors gas pressure changes in real time through a pressure measuring mechanism, and characterizes the volume of leaked inert gas through the liquid level changes of a drainage measuring mechanism, thereby simplifying the complex measurement process into an intuitive liquid discharge volume, and realizing direct quantification of the volume of leaked gas, thereby converting the traditional indirect calculation of pressure decay into a direct measurement of pressure-volume, avoiding the influence of pipeline pressure drop on measurement accuracy, and thereby improving measurement accuracy.

[0015] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and other objects, features and advantages of the present application will become more apparent through a more detailed description of exemplary embodiments of the present application in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments of the present application.

[0017] Figure 1 Schematic diagram of the structure of a pressure-volume monitoring device shown in an embodiment of the present application; Figure 2 Schematic diagram of the structure of the test chamber and the fixture shown in the embodiment of the present application; Figure 3 is a structural diagram of a pressure measurement mechanism shown in an embodiment of the present application; Figure 4 Schematic diagram of the structure of the drainage measurement mechanism shown in the embodiment of the present application; Figure 5 Schematic diagram of the structure of the air supply mechanism shown in the embodiment of the present application; Figure 6 Schematic diagram of the structure of the ultrasonic water level measurement mechanism shown in an embodiment of the present application; Figure 7 It is a structural schematic diagram of the hydraulic loading mechanism shown in an embodiment of the present application.

[0018] Reference numerals: 1. pressure measuring mechanism; 2. display module; 3. control module; 4. signal transmission cable; 5. measuring diaphragm; 6. pressure sensor probe; 7. drainage measuring mechanism; 8. base; 9. graduated cylinder; 10. scale; 11. bending joint; 12. exhaust terminal; 13. hydraulic loading mechanism; 14. handle; 15. connecting part; 16. top support head; 17. piston rod; 18. hydraulic cylinder; 19. connecting rod; 20. main body base; 21. test chamber and fixture device; 22. movable casters; 23. oil return button; 24. air storage tank; 25. exhaust port; 26. fixture; 27. Test chamber; 28. Support column; 29. ​​Air inlet; 30. Air supply mechanism; 31. Output interface; 32. Flow meter; 33. Pressure gauge; 34. Cylinder valve; 35. Pressure reducing valve; 36. Cylinder body; 37. Cylinder caster; 38. Fixed bracket; 39. Ultrasonic water level measurement mechanism; 40. Power button; 41. Reset button; 42. Fixing screw; 43. Power button; 44. Advanced settings button; 45. Display; 46. MP3 player module; 47. Speaker; 48. Signal transmission line; 49. Ultrasonic water level sensor probe; 50. Circuit board; 51. Rubber plug. DETAILED DESCRIPTION

[0019] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0020] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0021] In this application, unless otherwise specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0022] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0023] In this application, the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0024] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

[0025] The above description is merely an optional embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

[0026] In order to make the purpose, technical solutions and beneficial effects of the present application clearer, the preferred embodiments of the present application will be described in detail below with reference to the accompanying drawings to facilitate understanding by technical personnel.

[0027] Example 1: See also Figure 1 and Figure 2 A pressure-volume monitoring device for non-metallic gasket leakage testing includes a test chamber 27, an air storage box 24, and a fixture 26. The fixture 26 is provided with a non-metallic gasket. The pressure-volume monitoring device for non-metallic gasket leakage testing also includes: A gas supply mechanism 30, whose output interface 31 is connected to the gas inlet 29 of the gas storage box 24 to provide an inert gas source; A pressure measuring mechanism 1, whose signal acquisition end is embedded in the lower end of the non-metallic gasket to obtain a gas pressure signal; The drainage measuring mechanism 7 has an input end connected to the exhaust port 25 of the gas storage tank 24 and is used to represent the volume of leaked inert gas through changes in liquid level.

[0028] Specifically, the non-metallic gasket is clamped onto a fixture 26. The fixture 26 is configured to adjust the clamping force of the non-metallic gasket to match its elastic deformation characteristics. Together, the fixture 26 and the non-metallic gasket form a sealed pipe space. The signal acquisition terminal acquires the gas pressure signal in real time, thereby monitoring gas pressure changes in real time.

[0029] There's a gap between the test chamber 27 and the gas storage box 24, which are connected by a support column 28. A fixture 26 is located in the center of the bottom of the test chamber 27. An air inlet 29 is located on one side of the top of the gas storage box 24, and an exhaust port 25 is located on the other side. Both the air inlet 29 and the exhaust port 25 are located below the fixture 26. They are connected to the output port 31 of the gas supply mechanism 30 and the input of the drainage measurement mechanism 7, respectively, allowing the inert gas provided by the gas supply mechanism 30 to enter the gas storage box 24 through the air inlet 29. The inert gas flow path is: air inlet 29, non-metallic gasket, gas storage box 24, and exhaust port 25.

[0030] Traditional pressure-volume monitoring devices used for non-metallic gasket leakage experiments usually use a pressure decay model for pressure monitoring and volume calculation, that is, by monitoring the pressure decay over time in a closed system and combining it with the ideal gas state equation to indirectly infer the volume of leaked gas. However, this measurement method is prone to a decrease in measurement accuracy due to pipeline pressure drop. The present application monitors gas pressure changes in real time through a pressure measuring mechanism 1, and characterizes the volume of leaked inert gas through the liquid level changes of a drainage measuring mechanism 7, thereby simplifying the complex measurement process into an intuitive liquid discharge volume, and realizing direct quantification of the volume of leaked gas, thereby converting the traditional indirect inference of pressure decay into a direct measurement of pressure-volume, avoiding the influence of pipeline pressure drop on measurement accuracy, and thus improving measurement accuracy.

[0031] Example 2: See also Figures 1 to 3 Based on embodiment one, optionally, the fixture 26 is connected through a rotating shaft inside the test cavity 27, the fixture 26 includes an upper fixture and a lower fixture, the signal acquisition end includes a measuring diaphragm 5 and a pressure sensor probe 6, the non-metallic gasket is clamped between the upper fixture and the lower fixture, the measuring diaphragm 5 is arranged at the lower end of the non-metallic gasket, and the pressure sensor 6 probe is connected to the measuring diaphragm 5.

[0032] Specifically, the test chamber 27 has power supply and rotation axis constraint functions: its internal integrated power circuit provides the electrical energy required for the test, and through the rigid fixed fixture 26, the rotating axis can only perform circular motion along a single axis, thereby eliminating experimental errors caused by component offset and vibration.

[0033] During experimental measurements, a non-metallic gasket is placed beneath the upper fixture. Below this non-metallic gasket is the measuring diaphragm 5, and below this is the lower fixture. The lower fixture is lifted upward to clamp the non-metallic gasket. In this embodiment, the measuring diaphragm 5 contacts the gas within the gas storage tank 24. When the pressure changes, the diaphragm deforms. The pressure sensor probe 6 converts this mechanical deformation into an electrical signal to obtain the gas pressure signal. The pressure sensor probe 6 is directly embedded between the upper and lower fixtures, eliminating errors caused by environmental interference in external sensors, thereby improving detection accuracy and effectively addressing the insufficient pressure measurement accuracy in traditional devices.

[0034] Optionally, the pressure measuring mechanism 1 further includes a control module 3 and a display module 2 , the pressure sensor 6 is electrically connected to the input end of the control module 3 via a signal transmission cable 4 , and the output end of the control module 3 is electrically connected to the input end of the display module 2 .

[0035] Specifically, when the measuring diaphragm 5 deforms, it drives the pressure-sensitive element (such as a piezoresistive or capacitive sensor) within the sensor probe 6 to convert the pressure signal into an electrical signal. This electrical signal is then transmitted via the signal transmission cable 4 to the control module 3. The module, equipped with built-in amplification and filtering circuits and an A / D converter, converts the analog signal into a digital signal and processes it in real time. The display module 2 is connected to the control module 3, converting the processed digital signal into visual information, making it easy to view the measurement data acquired by the pressure sensor probe 6. Furthermore, the modular design of the pressure measurement mechanism 1 facilitates installation, disassembly, and replacement, significantly improving equipment maintenance efficiency.

[0036] Example 3: See also Figure 1 and Figure 4 Based on the above embodiment, optionally, the drainage measurement mechanism 7 includes: The base 8 has a measuring cylinder 9 at its upper end, in which a quantitative liquid is pre-placed. The opening of the measuring cylinder 9 is connected to one end of a scale 10 through a rubber stopper 51, and the other end of the scale 10 is connected to an exhaust terminal 12, which is connected to the exhaust port 25 of the air storage tank.

[0037] Specifically, a U-shaped two-way air guide tube (not shown) is installed inside the air storage tank 24. One end of the two-way air guide tube is connected to the output port 31 of the air supply mechanism 30 via the air inlet 29, and the other end is connected to the exhaust terminal 12 via the exhaust port 25. The exhaust terminal 12 is connected to the scale 10 via a bend 11. The lower end of the scale 10 is inserted into the graduated cylinder 9 via a rubber stopper 51, forming a closed-type water-discharging graduated cylinder. Escaping inert gas is transported through the two-way air guide tube to the exhaust terminal 12, then reaches the bend 11, and then passes through the scale 10 to reach the graduated cylinder 9. Because the graduated cylinder 9 contains a predetermined amount of liquid, the graduated cylinder 9 has a certain water level. This initial level is measured and recorded by a water level sensor. As the gas enters the graduated cylinder 9, the water level rises slightly, and the water level sensor displays a second level. Subtracting the initial level from the second level provides the volume of leaked inert gas. Since the volume of the leaked gas cannot be accurately obtained from a single experimental measurement, it is necessary to conduct multiple experimental measurements and take the average value to accurately obtain the value.

[0038] Furthermore, when gas enters the non-metallic gasket through the inlet 29, due to the inherent physical adsorption properties of the non-metallic gasket and its irregular microscopic pores, some of the gas is retained within these pores, temporarily storing or releasing the gas. After the leak rate test is completed, the valve of the gas supply mechanism 30 is closed, the power to the mechanism is turned off, and the rubber stopper 51 on the graduated cylinder 9 is opened. The gas temporarily stored in the non-metallic gasket is discharged into the graduated cylinder 9 through the exhaust terminal 12. Opening the rubber stopper 51 prevents the graduated cylinder 9 from collapsing due to excessive internal pressure.

[0039] In this embodiment, the volume of leaked inert gas is characterized by the change in the liquid level of the closed drainage graduated cylinder, simplifying the complex measurement process into an intuitive reading of the liquid discharge volume. This allows for direct quantification of the leaked gas volume, thus avoiding the problem of traditional pressure decay model measurement methods that can lead to reduced measurement accuracy due to pipeline pressure drop. This improves measurement accuracy and makes operation more convenient. Furthermore, a rubber stopper 51 is used to seal the graduated cylinder 9, forming a closed drainage graduated cylinder to prevent measurement errors caused by gas escape.

[0040] Example 4: See also Figure 5 Based on the above embodiment, optionally, the air supply mechanism 30 includes: A fixed bracket 38 is provided, in which a gas cylinder body 36 is clamped. A gas cylinder valve 34 is threadedly connected to the output interface 31 of the gas cylinder body 36. A pressure reducing valve 35, a pressure gauge 33 and a flow meter 32 are installed downstream of the gas cylinder valve 34 in sequence, and the output interface 31 is connected to the air inlet 29 of the gas storage box 24 through a hose.

[0041] Specifically, a fixing bracket 38 is used to secure the gas cylinder body 36, preventing it from tipping over due to imbalance during movement or use. The gas cylinder body 36 stores high-purity inert gas (such as nitrogen), and a gas cylinder valve 34 controls the flow of gas. A pressure reducing valve 35 reduces the high-pressure gas in the cylinder to the required pressure for testing, and a pressure gauge 33 displays the output pressure in real time. A flow meter 32 measures the gas flow rate to ensure a stable gas supply. The output port 31 is connected to the gas inlet 29 of the gas storage tank 24 via a flexible hose, establishing communication between the gas cylinder body 36 and the gas storage tank 24.

[0042] The working process is as follows: open the gas cylinder valve 34, the gas is reduced in pressure through the pressure reducing valve 35, the pressure gauge 33 displays the pressure, the flow meter 32 measures the flow, and the gas enters the gas inlet 29 of the gas storage box 24 through the output interface 31 and the hose, thereby providing a stable gas source for the leakage experiment and avoiding the volume conversion error caused by gas source fluctuations.

[0043] Embodiment 5: See also Figure 6 Based on the above embodiment, optionally, an ultrasonic water level measuring mechanism 39 is further included, and the ultrasonic water level measuring mechanism 39 includes: An ultrasonic water level sensor probe 49 is electrically connected to a circuit board 50 via a signal transmission line 48. The circuit board 50 integrates a display 45, an MP3 player module 46, a speaker 47, a power button 40, a reset button 41, and a power button 43. Among them, the ultrasonic water level sensor probe 49 is vertically installed at the bottom of the measuring cylinder 9 to emit ultrasonic signals to the liquid surface in the measuring cylinder 9 and receive reflected signals. The MP3 player module 46 is connected to the speaker 47 through an audio signal line to trigger the voice broadcast of the speaker 47 according to the ultrasonic signal of the ultrasonic water level sensor probe 49.

[0044] Specifically, an ultrasonic water level sensor probe 49 is mounted at the bottom of the graduated cylinder 9 and emits ultrasonic pulses toward the water surface. The signal is then reflected by the liquid surface and received by the probe. The distance from the probe to the liquid surface is calculated based on the ultrasonic propagation time and sound velocity, enabling real-time monitoring of water level changes within the graduated cylinder 9. This principle avoids the errors associated with traditional manual visual readings, enabling non-contact, high-precision measurement. Signal transmission lines 48 transmit data to the circuit board 50 in real time, ensuring undelayed feedback of measurement data. The circuit board 50, serving as the core processing unit, filters and calculates the ultrasonic signal, converting the liquid level difference into leaked gas volume data. The display 45 displays the water level and volume data in real time, making it easy for the experimenter to read intuitively. A voice announcement is triggered based on the probe's measurement data, automatically reporting the current water level and volume change, reducing manual reading errors. This feature is particularly suitable for continuous monitoring of multiple data sets. The voice feedback function enhances operational convenience and reduces the workload of the experimenter. The power button 40, reset button 41, and power button 43 are driven by the circuit board 50 to start and stop the ultrasonic measurement function and reset parameters.

[0045] In this embodiment, the ultrasonic sensor, combined with the rubber stopper 51 that seals the graduated cylinder 9, reduces external airflow interference and liquid evaporation. Combined with ultrasonic non-contact measurement, the water level change signal is more stable and its anti-interference capability is enhanced, significantly enhancing the water level change signal and more than tripling the sensitivity of leaked gas volume measurements. Real-time feedback from the speaker 47 simplifies manual operation. Furthermore, the modular structure supports rapid maintenance and component replacement, further reducing operational costs. This device surpasses traditional methods in portability, accuracy, and anti-interference performance, providing reliable technical support for evaluating the leakage performance of non-metallic gaskets.

[0046] In addition, the circuit board 50 is equipped with a fixing screw 42 and an advanced settings button 44. The fixing screw 42, through a four-point fixing structure, disperses external forces acting on the circuit board 50 and evenly distributes stress, preventing localized excessive force from causing deformation of the circuit board 50. It also reinforces the component mounting area, inhibiting component sagging or loosening, and ensuring the accuracy of experimental data collection. The advanced settings button 44 is configured to set the water level warning threshold of the graduated cylinder 9 to accommodate the measurement requirements of different non-metallic gasket leakage volumes. When the real-time water level exceeds the warning threshold, the current data is deemed invalid and requires re-measurement to ensure the accuracy of the final experimental results and the rigor of the process.

[0047] Example 6: See also Figure 7 Based on the above embodiment, optionally, a hydraulic loading mechanism 13 is further included, and the hydraulic loading mechanism 13 includes: A hydraulic cylinder 18, wherein the axial upper end of the piston rod 17 of the hydraulic cylinder 18 is threadedly connected to a support head 16, the support head 16 is connected to the upper clamp and aligned with it, the hydraulic cylinder 18 is provided with a handle 14, and the hydraulic cylinder 18 is connected to the air tank 24 through a pipeline, and the air tank 24 is provided with an oil return button 23.

[0048] Specifically, the hydraulic cylinder 18 is mounted in the middle of the air tank 24. Its piston rod 17 extends vertically upward and is threadedly connected to the top support head 16. The support head 16 is aligned with the upper fixture of the test chamber 27 for applying pressure. The handle 14 is mounted on the side of the hydraulic cylinder 18 via a connecting portion 15 and a connecting rod 19. The connecting portion 15 is provided with a main base 20, which stabilizes and secures the handle 14 and the connecting portion 15, ensuring the stability of the handle 14 during pressing. The connecting rod 19 transmits the generated lever driving force to the cylinder pressure piston, driving it to perform linear displacement. The hydraulic cylinder 18 is connected to the air tank 24 via a pipeline, and cooperates with the hydraulic cylinder 18 through the handle 14 to provide auxiliary hydraulic support.

[0049] The pressure loading process is as follows: pressing the handle 14 drives the connecting rod 19 to drive the piston movement in the hydraulic cylinder 18, converting mechanical energy into hydraulic energy, and pushing the piston rod 17 to extend upward. The piston rod 17 pushes the support head 16 vertically upward. When the support head 16 moves upward, it will use the rotating axis in the test chamber 27 as a fulcrum to "pry up" the bottom of the lower clamp, causing it to rotate upward around the axis, so that the support head 16 pushes the lower clamp and applies vertical upward pressure to the non-metallic gasket to clamp the non-metallic gasket. If the clamping force is too large, rotate the oil return button 23 to release the clamping force. If the clamping force is too small, continue to press the handle 14 until the experimental requirements are met.

[0050] The auxiliary hydraulic process occurs when the operator depresses handle 14, which drives connecting rod 19 to push a small piston in hydraulic cylinder 18, compressing the hydraulic oil in the pump chamber. The oil pressure is then transmitted through a sealed pipeline to the lifting hydraulic cylinder 18, converting mechanical energy into hydraulic energy. This pushes piston rod 17 upward. This auxiliary hydraulic support stabilizes pressure output and prevents fluctuations.

[0051] See also Figure 2 and Figure 5 Optionally, casters are provided at the bottom of the fixing bracket 38 and the air storage box 24.

[0052] Specifically, the casters are respectively a gas cylinder caster 37 provided at the bottom of the fixed bracket 38 and a movable caster 22 provided at the bottom of the gas storage box 2. This design enables the convenient movement of the entire device in various scenarios such as laboratories, factories, and outdoors; the installation of the casters has a high degree of structural logic. The movable caster 22 is directly fixed to the bottom of the gas storage box 24 by bolts, ensuring the stability and mobility of the main part. At the same time, the gas cylinder caster 47 is directly embedded in the bottom of the fixed bracket 38 of the gas supply mechanism 30, and the center of gravity balance design of the gas cylinder is utilized to make the entire gas supply mechanism 30 more stable during movement; through this design, the experimenter is no longer restricted to fixed experimental conditions, but can flexibly adjust the position of the equipment, thereby greatly improving the practicality of the device. At the same time, the mobile design also facilitates the daily maintenance and storage of the equipment, effectively reducing the use cost and operation difficulty of the equipment.

[0053] It should be noted that the structures and / or installation methods not detailed in this application are known to those skilled in the art in combination with common knowledge and / or existing technologies, and are not the focus of disclosure in this application and will not be further elaborated here.

[0054] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present application and are not limiting. Although the present application has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present application; the dimensions of the drawings are not related to the specific objects, and the dimensions of the objects can be changed arbitrarily.

Claims

1. A pressure-volume monitoring device for non-metallic gasket leakage testing, comprising a test chamber, an air storage box, and a fixture, wherein the non-metallic gasket is clamped on the fixture, characterized in that: The pressure-volume monitoring device for non-metallic gasket leakage testing also includes: an air supply mechanism, the output interface of which is connected to the air inlet of the air storage box to provide an inert gas source; A pressure measuring mechanism, wherein a signal collecting end thereof is embedded in the lower end of the non-metallic gasket to obtain a gas pressure signal; The drainage measuring mechanism has an input end connected to the exhaust port of the gas storage tank and is used to characterize the volume of leaked inert gas through changes in liquid level.

2. The pressure-volume monitoring device for non-metallic gasket leakage testing according to claim 1, characterized in that: The fixture is connected through a rotating shaft inside the test cavity. The fixture includes an upper fixture and a lower fixture. The signal acquisition end includes a measuring diaphragm and a pressure sensor probe. The non-metallic gasket is clamped between the upper fixture and the lower fixture. The measuring diaphragm is arranged at the lower end of the non-metallic gasket. The pressure sensor probe is connected to the measuring diaphragm.

3. The pressure-volume monitoring device for non-metallic gasket leakage testing according to claim 2, characterized in that: The pressure measurement mechanism further includes a control module and a display module. The pressure sensor is electrically connected to the input end of the control module via a signal transmission cable, and the output end of the control module is electrically connected to the input end of the display module.

4. The pressure-volume monitoring device for non-metallic gasket leakage testing according to claim 1, characterized in that: The drainage measurement mechanism includes: A base is provided at the upper end of the base, wherein a quantitative liquid is pre-placed in the measuring cylinder, one end of the scale is connected to the opening of the measuring cylinder through a rubber stopper, the other end of the scale is connected to the exhaust terminal, and the exhaust terminal is connected to the exhaust port of the air storage box.

5. The pressure-volume monitoring device for non-metallic gasket leakage testing according to claim 4, characterized in that: The air supply mechanism comprises: A fixed bracket is provided with a gas cylinder body, an output interface of the gas cylinder body is threadedly connected to a gas cylinder valve, a pressure reducing valve, a pressure gauge and a flow meter are sequentially installed downstream of the gas cylinder valve, and the output interface is connected to the gas inlet of the gas storage box through a hose.

6. The pressure-volume monitoring device for non-metallic gasket leakage testing according to claim 4, characterized in that: It also includes an ultrasonic water level measurement mechanism, which includes: An ultrasonic water level sensor probe, the ultrasonic water level sensor probe being electrically connected to a circuit board via a signal transmission line, the circuit board being integrated with a display, an MP3 player module, a speaker, a power button, a reset button, and a power button; Among them, the ultrasonic water level sensor probe is vertically installed at the bottom of the measuring cylinder to transmit ultrasonic signals to the liquid surface in the measuring cylinder and receive reflected signals. The MP3 player module is connected to the speaker through an audio signal line to trigger the voice broadcast of the speaker according to the ultrasonic signal of the ultrasonic water level sensor probe.

7. The pressure-volume monitoring device for non-metallic gasket leakage testing according to claim 1, characterized in that: It also includes a hydraulic loading mechanism, the hydraulic loading mechanism comprising: A hydraulic cylinder, wherein the axial upper end of the piston rod of the hydraulic cylinder is threadedly connected to a support head, the support head is connected to the upper clamp and aligned with it, the hydraulic cylinder is provided with a handle, and the hydraulic cylinder is connected to the air tank through a pipeline, and the air tank is provided with an oil return button.

8. The pressure-volume monitoring device for non-metallic gasket leakage testing according to claim 7, characterized in that: The fixing bracket and the bottom of the air storage box are provided with casters.

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