A valve housing hydraulic strength detection method

Abstract

This invention discloses a method for testing the hydraulic strength of valve bodies, relating to the technical field of valve body hydraulic strength testing equipment, including a control panel. The invention utilizes the elastic cooperation between a slider and a compression spring to facilitate the conversion of hydraulic strength into electrical signal data, improving the accuracy of the test results and enabling the detection of hydraulic thresholds. Through layered monitoring and data feature analysis, it achieves precise tracing of sealing problems. When abnormal pressure data is detected, the failure type can be quickly distinguished by combining the sealing stage and pressure fluctuation characteristics. This avoids the traditional method of relying solely on manual observation to judge sealing performance, which carries the risk of subjective error and missed detection, and cannot accurately identify hidden defects such as minute leaks or poor interface fit. It achieves precise identification of sealing anomaly types, real-time monitoring and early warning, improves the level of automation in testing, reduces human intervention, and enhances testing efficiency and consistency.

Description

Technical Field

[0001] This invention relates to the field of valve body hydraulic strength testing equipment, and in particular to a method for testing the hydraulic strength of valve bodies. Background Technology

[0002] As a core pressure-bearing component in industrial systems such as fluid transportation and pressure control, the hydraulic strength of the valve body directly determines the operational safety and service life of the entire system. In fields such as petrochemicals, nuclear power, urban pipe networks, and shipbuilding, valve bodies are subjected to complex working conditions such as high pressure and corrosive media for a long time. If the hydraulic strength is not up to standard, it is very easy to cause major safety accidents such as shell rupture and media leakage, resulting in casualties, property damage and environmental pollution.

[0003] Traditional valve body hydraulic strength testing methods have several shortcomings. Some testing methods rely on manual operation when locating the valve body, which is not only inefficient but also makes it difficult to guarantee the accuracy of the positioning, easily leading to deviations in the detection position and affecting the accuracy of the test results. Some testing devices have problems with liquid transmission, and the water pressure control is not stable enough, making it impossible to achieve continuous and precise pressurization. This results in large fluctuations in liquid pressure during the testing process, making it difficult to simulate the real use environment. In addition, for the detection of the hydraulic threshold of the valve body, traditional methods can mostly only make qualitative judgments and cannot accurately convert the hydraulic strength into specific electrical signal data, resulting in inaccurate test results that cannot provide a reliable basis for valve quality assessment and improvement.

[0004] Therefore, the above-mentioned problems need to be addressed and improved. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a method for testing the hydraulic strength of valve bodies.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a method for testing the hydraulic strength of a valve body, comprising a control panel, and the steps of the testing method include:

[0007] Q1: After the valve body is stably positioned, the water injection pipe rises under the action of the second motor and extends into the valve body to perform liquid injection. The water pressure pushes the slider to move. When the slider comes into contact with the pressure sensor and no liquid seeps out, it indicates that the hydraulic bearing capacity of the test piece meets the standard. Subsequently, after the water pressure increases, the hydraulic threshold of the valve body is determined based on the change in pressure data.

[0008] Q2: Calculate the mean and standard deviation of the preprocessed pressure data and set the fluctuation range. If the pressure inside the housing rises to the rated value and remains at the set duration, it is not within the fluctuation range. Number of internal pressure data If the pressure data changes, it is determined that there is an abnormality in the sealing performance, and the staff is alerted to the abnormality; the type of abnormality is determined based on the changes in pressure data, and the determined type of abnormality is synchronously transmitted to the warning unit.

[0009] Q3: Analyze the pressure data during the testing process to determine the initial damage and single-cycle damage of the housing, estimate the remaining service life of the housing, and warn the staff to replace the housing when the remaining service life is less than the threshold.

[0010] Preferably, a bracket is provided on one side of the control panel, and multiple air pipes are connected between the control panel and the bracket via a connecting seat. An explosion-proof box is installed on the upper end of the bracket, and cylinders are installed on both sides and the top surface of the explosion-proof box. A detection mechanism is installed at the output end of each cylinder. A linear motor is installed on the bracket, and a water pump is installed at the rear end of the bracket. A pressurization mechanism is installed at the output end of the water pump.

[0011] The control panel is equipped with a monitoring module, which includes an analysis unit.

[0012] The analysis unit receives the acquired pressure data, preprocesses the data, and counts the number of abnormal data in the preprocessed pressure data. If the number of abnormal data exceeds a threshold, a sealing warning signal is generated and transmitted to the warning unit. The unit determines the type of abnormality based on the changes in pressure data and transmits the determined type of abnormality to the warning unit. The unit analyzes the pressure data during the detection process to determine the initial damage and single-cycle damage of the housing, estimates the remaining service life of the housing, and generates a housing replacement signal when the remaining service life is less than a threshold, and transmits the housing replacement signal to the warning unit.

[0013] Preferably, the steps for the analysis module to determine abnormal sealing performance are as follows:

[0014] M1: Preprocesses the acquired pressure data, sorts the data according to the acquisition time, calculates the mean and standard deviation, and then sets the fluctuation range based on the mean and standard deviation. If the pressure inside the casing rises to the rated value and remains at that value for a set duration, the acquired pressure data may not be within the fluctuation range. Within, for those outside the fluctuation range Number of internal pressure data If statistics are performed, If the sealing performance is abnormal, a sealing warning signal is generated and transmitted to the warning unit. This is a preset proportional coefficient. This represents the total number of data collection points at corresponding time points during the process.

[0015] M2: If the preset low pressure threshold is greater than the initial sealing pressure value, it is determined that there is an abnormality in the fit between the sealing ring and the housing interface, and it is recorded as an abnormal fit of the interface; if the pressure data exceeds the set allowable range during the rated pressure maintenance period, it is determined that there is a small gap in the housing interface, and it is recorded as an abnormal crack in the interface.

[0016] Preferably, the analysis module performs the following steps to analyze the remaining service life of the housing:

[0017] N1: Initial fatigue damage to the shell , and These are the actual tested ultimate pressure threshold of the shell and the design ultimate pressure threshold of the shell, respectively. and These are the weighting coefficients for ultimate pressure deviation and structural uniformity, respectively. The goodness of fit of the linear relationship between the pressure and displacement curve;

[0018] N2: Damage degree per pressure cycle , The fatigue life cycle count of the material under fluctuating operating pressure; the remaining service life of the housing. , The annual cumulative pressure cycle count under operating conditions; when When necessary, a housing replacement signal is generated and transmitted to the warning unit. This is the preset remaining service life threshold.

[0019] Preferably, an explosion-proof door is slidably connected to the front end of the explosion-proof box, a rack is installed on one side of the explosion-proof door, a first motor is installed on the inner side of the explosion-proof box, and a gear is installed on the output end of the first motor through a coupling. The gear is rotatably installed on one side of the explosion-proof box and meshes with the first motor for transmission.

[0020] Preferably, the detection mechanism includes an inner tube installed at the output end of the cylinder, the inner tube having an installation groove, a pressure sensor being installed at the center of one end of the installation groove, and a slider being inserted into the opening of the installation groove.

[0021] Preferably, a compression spring is installed between one end of the mounting groove and the slider, the compression spring is sleeved around the pressure sensor, and a first sealing ring and a pressure plate are respectively installed around the inner tube, with the pressure plate located on one side of the first sealing ring.

[0022] Preferably, a three-jaw caliper is slidably connected to the linear motor, a first through groove is provided at the center of the three-jaw caliper, and a second through groove is provided at the bottom of the explosion-proof box to match the first through groove.

[0023] Preferably, the pressurizing mechanism includes a second motor and a guide rod installed at the lower end of the bracket. A lead screw is installed at the output end of the second motor through a coupling, and a water injection pipe is provided directly below the first through groove and the second through groove. The other end of the water injection pipe is connected to the output end of the water pump through a hose.

[0024] Preferably, two ear plates are installed around the water injection pipe, one ear plate is threaded to the lead screw, and the other ear plate is inserted into the guide rod, and a second sealing ring is installed around the output end of the water injection pipe.

[0025] Compared with the prior art, the beneficial effects of the present invention are:

[0026] 1. The combination of a three-jaw caliper, cylinder, and pressure plate facilitates precise clamping and positioning of the valve body to be tested, improving the accuracy of the detection position and enabling stable clamping of the valve body. Furthermore, the combination of a water pump and pressurizing mechanism facilitates stable water delivery to the injection pipe, improving the continuity of liquid transmission and enabling continuous pressurization. Finally, the elastic combination of the slider and compression spring, along with real-time detection by a pressure sensor, facilitates the conversion of hydraulic pressure into electrical signal data, improving the accuracy of the detection results and enabling the detection of hydraulic threshold values. Ultimately, this solves the problems of poor device positioning, low water pressure control accuracy, and inability to detect valve body threshold values.

[0027] 2. Through layered monitoring and data feature analysis, precise tracing of sealing problems is achieved. When abnormal pressure data is detected, the failure type can be quickly distinguished by combining the sealing stage and pressure fluctuation characteristics. This avoids the problem of relying solely on manual observation to judge sealing performance in traditional testing, which has the risk of subjective error and missed judgment. It also avoids the inability to accurately identify hidden defects such as minor leaks or poor interface fit. This enables precise identification of sealing anomaly types, real-time monitoring and early warning, improves the level of automation in testing, reduces human intervention, and improves testing efficiency and consistency.

[0028] 3. By integrating pressure testing data and material property parameters, a residual service life assessment model for the shell based on fatigue damage theory was constructed. This avoids over-reliance on periodic replacement strategies, which could lead to resource waste or safety hazards caused by untimely replacement. By combining initial damage degree and single-cycle damage degree, the residual service life can be quantified, improving the foresight and economy of equipment management and realizing the transformation from "reactive maintenance" to "predictive maintenance". Attached Figure Description

[0029] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings:

[0030] Figure 1 This is a schematic diagram of the overall appearance of the device proposed in this invention;

[0031] Figure 2 This is a side view of the overall appearance of the device proposed in this invention;

[0032] Figure 3 This is a schematic diagram of the explosion-proof box structure proposed in this invention;

[0033] Figure 4 This is a schematic diagram of the detection mechanism structure proposed in this invention;

[0034] Figure 5 This is a schematic diagram of the pressurization mechanism proposed in this invention;

[0035] Figure 6 This is a schematic diagram of the linear motor structure proposed in this invention;

[0036] Figure 7 This is a flowchart of the system proposed in this invention.

[0037] The components in the diagram are numbered as follows: 1. Control panel; 2. Bracket; 3. Explosion-proof box; 4. Cylinder; 5. Linear motor; 6. Explosion-proof door; 7. Rack; 8. First motor; 9. Gear; 10. Inner tube; 11. Slider; 12. Pressure sensor; 13. Compression spring; 14. First sealing ring; 15. Pressure plate; 16. Three-jaw caliper; 17. Water pump; 18. Second motor; 19. Guide rod; 20. Water injection pipe; 21. Second sealing ring. Detailed Implementation

[0038] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0039] Example 1: See Figures 1 to 6This invention discloses a method for testing the hydraulic strength of a valve body, comprising a control panel 1 and a bracket 2 located on one side of the control panel 1. The control panel 1 facilitates control of water pressure and mechanical switches; the bracket 2 facilitates the installation of an explosion-proof enclosure 3; multiple air pipes are connected between the control panel 1 and the bracket 2 via connecting seats; the explosion-proof enclosure 3 is installed on the upper end of the bracket 2, facilitating the installation of an explosion-proof door 6 and preventing damage to the outside world caused by valve rupture; cylinders 4 are installed on both sides and the top surface of the explosion-proof enclosure 3, facilitating the movement of the testing mechanism; the output ends of the cylinders 4 are equipped with... A testing agency is present. A linear motor 5 is installed on the bracket 2, which facilitates the movement of the three-jaw caliper 16 to directly above the water injection pipe 20. A water pump 17 is installed at the rear end of the bracket 2, which facilitates the injection of high-pressure liquid into the valve housing. A pressurizing mechanism is installed at the output end of the water pump 17. An explosion-proof door 6 is slidably connected to the front end of the explosion-proof box 3, which enhances the safety of the explosion-proof box 3. A rack 7 is installed on one side of the explosion-proof door 6, which facilitates the raising and lowering of the explosion-proof door 6. A first motor 8 is installed on the inner side of the explosion-proof box 3. The motor 8 facilitates the rotation of the gear 9; the output end of the first motor 8 is equipped with the gear 9 via a coupling, which facilitates the lifting and lowering of the rack 7; the gear 9 is rotatably mounted on one side of the explosion-proof box 3, and the gear 9 meshes with the rack 7 for transmission; the detection mechanism includes an inner tube 10 installed at the output end of the cylinder 4, which facilitates the installation of a pressure sensor 12; the inner tube 10 has a mounting groove, and a pressure sensor 12 is installed at the center of one end of the mounting groove, which facilitates the testing of the pressure threshold of the valve body; and a slider 11 is inserted into the opening of the mounting groove. The slider 11 facilitates the compression of the spring 13 by pressing it backward under water pressure; a compression spring 13 is installed between one end of the mounting groove and the slider 11, which facilitates the push of the slider 11 to reset after the detection is completed; the compression spring 13 is sleeved around the pressure sensor 12, and a first sealing ring 14 and a pressure plate 15 are respectively installed around the inner tube 10. The first sealing ring 14 is used to inflate and expand after the inner tube 10 is inserted into the valve body to achieve a sealing effect; the pressure plate 15 is used to abut against the groove of the valve body to achieve a limiting effect.

[0040] In this invention, the pressure plate 15 is located on one side of the first sealing ring 14, and a three-jaw caliper 16 is slidably connected to the linear motor 5. The three-jaw caliper 16 facilitates clamping the valve body from the inside out. A first through groove is provided at the center of the three-jaw caliper 16, and a second through groove matching the first through groove is provided at the bottom of the explosion-proof box 3. The pressurizing mechanism includes a second motor 18 and a guide rod 19 installed at the lower end of the bracket 2. The second motor 18 facilitates driving the lead screw to rotate. The cooperation between the lead screw and the guide rod 19 facilitates driving the water injection pipe 20 to rise and fall into the valve body. A lead screw is installed at the output end of the machine 18 via a coupling, and a water injection pipe 20 is provided directly below the first and second through slots. The water injection pipe 20 facilitates the injection of high-pressure liquid into the valve body. The other end of the water injection pipe 20 is connected to the output end of the water pump 17 via a hose. Two ear plates are installed around the water injection pipe 20. One ear plate is threaded to the lead screw, and the other ear plate is inserted into the guide rod 19. A second sealing ring 21 is installed around the output end of the water injection pipe 20. The second sealing ring 21 facilitates the water injection pipe 20 to expand after being inserted into the valve base to achieve a sealing effect.

[0041] Working principle: When using this invention, first connect the device to the power supply and check whether the seals of the air pipes and other objects are intact. Then, place the valve body to be tested on the three-jaw clamp 16. The three-jaw clamp 16 clamps the valve body stably from the inside out. Start the linear motor 5 to move the three-jaw clamp 16 directly above the water injection pipe 20. Then, start the first motor 8. The gear 9 rotates and drives the rack 7 to rise and fall, causing the explosion-proof door 6 to fall and close, enhancing the safety of the explosion-proof box 3. Then, start the cylinder 4. The cylinder 4 drives the detection mechanism to move, and the inner tube 10 is inserted into the corresponding position of the valve body. The first sealing ring 14 is inflated and sealed. The pressure plate 15 abuts against the groove of the valve body. Through the pressure in three directions, combined with the positioning of the three-jaw clamp 16, it is ensured that the valve body will not shake during the test. Then, start the second motor 18. The second motor 18 drives the lead screw to rotate. The water injection pipe 20 rises with the cooperation of the lead screw and the guide rod 19, and extends into the interior of the valve body through the second through groove and the first through groove. The second sealing ring 21 is inflated to achieve a seal. At this time, the water pump 17 is started, and the water pump 17 delivers high-pressure liquid to the water injection pipe 20 through the hose, injecting liquid into the valve body. As the water pump 17 continues to work, the pressure inside the valve body continues to rise. The water pressure pushes the slider 11 backward to compress the spring 13. When the slider 11 comes into contact with the pressure sensor 12 and no liquid leaks out, it indicates that the hydraulic bearing capacity of the test piece meets the standard. Then the water pressure is increased. The pressure sensor 12 detects the pressure change in real time and converts the hydraulic strength into an electrical signal data. The operator can judge the hydraulic threshold of the valve body based on these data. When the test is completed, the water pump 17 stops working, the compression spring 13 pushes the slider 11 to reset, the second motor 18 is started to make the water injection pipe 20 descend and exit the valve body, the second sealing ring 21 is deflated, the first motor 8 is started to make the explosion-proof door 6 rise and open, the linear motor 5 is started to make the three-jaw caliper 16 move away, the tested valve body is removed, and the power is disconnected.

[0042] Example 2: See Figure 7 The control panel 1 is equipped with a monitoring module, which includes an analysis unit and an alarm unit.

[0043] The analysis unit receives the acquired pressure data, preprocesses the data, counts the number of abnormal data in the preprocessed pressure data, and if the number of abnormal data exceeds a threshold, generates a sealing warning signal and transmits the sealing warning signal to the warning unit; it determines the type of abnormality based on the changes in pressure data and transmits the determined abnormality type to the warning unit simultaneously; it analyzes the pressure data during the detection process, determines the initial damage and single-cycle damage of the shell, estimates the remaining service life of the shell, and generates a shell replacement signal when the remaining service life is less than a threshold, and transmits the shell replacement signal to the warning unit.

[0044] When the water pump 17 starts injecting liquid into the housing, the pressure gradually increases to the point where "the first sealing ring 14 and the second sealing ring 21 are fully expanded and sealed, and there is no liquid leakage". This pressure data is recorded as the initial sealing pressure value. According to the testing standard (such as the rated working pressure of the valve specified in the industry), the pressure inside the housing is raised to the rated value and maintained for a set time. The pressure sensor 12 records the pressure fluctuation data in real time during this process.

[0045] The acquired pressure data is sorted according to the collection time, and corresponding items collected at the same time are analyzed. Averaging the pressure data and standard deviation The calculation, and the mean obtained from the calculation. and standard deviation Perform pressure data fluctuation range The system sets the parameters, then compares the acquired pressure data with the pressure data fluctuation range, marks pressure data outside the fluctuation range as outliers, and records the number of outliers. ,like If the collected pressure data is abnormal, the data should be re-tested; if If outliers are removed, the remaining pressure data after outlier removal will be averaged. The calculation, and the mean obtained from the calculation. As the pressure data detected at the corresponding time;

[0046] The processed pressure data The data are sorted according to the collection time, and the mean and standard deviation are calculated, with a fluctuation range set. If the pressure inside the casing rises to the rated value and remains at that value for a set duration, the obtained pressure data may not be within the fluctuation range. Within, for those outside the fluctuation range Number of internal pressure data If statistics are performed, If the sealing performance is abnormal, a sealing warning signal is generated and transmitted to the warning unit. This is a preset proportional coefficient. This refers to the total number of data points collected during the process (i.e., the average value obtained during the process when the pressure inside the housing rises to the rated value and remains at the set duration). Total quantity);

[0047] If the preset low pressure threshold is greater than the initial sealing pressure value, it is determined that there is an abnormality in the fit between the sealing ring and the shell interface, and it is recorded as an interface fit abnormality; if the pressure data exceeds the set allowable range during the rated pressure maintenance period, it is determined that there is a small gap in the shell interface, and it is recorded as an interface crack abnormality; if the change in pressure data is less than the minimum value of the pressure change threshold before the pressure rises to the rated value, and the humidity in the area inside the explosion-proof box 3 exceeds the preset humidity threshold, it is determined that there is a crack in the shell itself, and it is recorded as a shell crack abnormality; if the pressure drops during the process of the shell being maintained at the rated pressure for a set time, and the results of multiple tests are consistent, it is determined that the load-bearing durability of the shell is poor, and it is recorded as a load-bearing durability abnormality; when the sealing warning signal is transmitted to the warning unit, the determined abnormality type is also transmitted to the warning unit simultaneously;

[0048] After receiving the sealing warning signal, the warning unit will issue a buzzer warning through the buzzer unit of the monitoring module and display the corresponding abnormality type on the control panel 1, so that the staff can take corresponding remedial measures for the corresponding abnormality type.

[0049] Initial fatigue damage of the shell , and These are the actual tested ultimate pressure threshold of the shell and the design ultimate pressure threshold of the shell, respectively. and These are the ultimate pressure deviation weighting coefficient (empirical value 0.6, reflecting the influence of ultimate strength on damage) and the structural uniformity weighting coefficient (empirical value 0.4, reflecting the influence of material uniformity on damage), respectively. The goodness of fit of the linear relationship between the pressure and displacement curve;

[0050] The pressure data of the pressure sensor 12 during the dynamic pressurization phase is acquired, and the displacement data of the slider 11 is obtained through the deformation of the compression spring 13. Assuming the pressure... With displacement The linear relationship is: ,in The slope is obtained by solving for the predicted pressure value using the least squares method. and intercept The specific value is then , The number of samples for the obtained pressure and displacement data;

[0051] Damage per pressure cycle , This refers to the number of fatigue life cycles of the material under fluctuating working pressure; the stress-life curve is obtained through material fatigue experiments. Curve, number of cycles The stress value at that time is denoted as the material fatigue strength coefficient. ; The slope of the curve is denoted as the material fatigue life index. ,but ;

[0052] Since the valve body is subjected to hydraulic pressure fluctuations, these pressure fluctuations need to be converted into material stress fluctuations; assuming the body wall thickness is... The inner diameter is Then the hydraulic pressure Circumferential stress generated It can be approximately calculated using the formula for thin-walled cylinders: ,but , This refers to the fluctuation range of operating pressure.

[0053] In summary, the remaining service life of the casing , The annual cumulative pressure cycle count under operating conditions; when When necessary, a housing replacement signal is generated and transmitted to the warning unit. This is the preset remaining service life threshold;

[0054] After receiving the housing replacement signal, the warning unit will issue a buzzer warning through the buzzer unit of the monitoring module and display the corresponding housing number on the control panel 1, so that the staff can replace the corresponding housing.

[0055] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A method for detecting hydraulic strength of a valve housing, comprising a console (1), characterized in that: A bracket (2) is provided on one side of the control panel (1). Multiple air pipes are connected between the control panel (1) and the bracket (2) through a connecting seat. An explosion-proof box (3) is installed on the upper end of the bracket (2). Cylinders (4) are installed on both sides and the top surface of the explosion-proof box (3). A detection mechanism is installed at the output end of each cylinder (4). A linear motor (5) is installed on the bracket (2). A water pump (17) is installed at the rear end of the bracket (2). A pressurization mechanism is installed at the output end of the water pump (17). The control panel (1) is equipped with a monitoring module, which includes an analysis unit: The analysis unit receives the acquired pressure data, preprocesses the data, counts the number of abnormal data in the preprocessed pressure data, and if the number of abnormal data exceeds a threshold, generates a sealing warning signal and transmits the sealing warning signal to the warning unit; it determines the type of abnormality based on the changes in pressure data and transmits the determined abnormality type to the warning unit simultaneously; it analyzes the pressure data during the detection process, determines the initial damage and single-cycle damage of the shell, estimates the remaining service life of the shell, and generates a shell replacement signal when the remaining service life is less than a threshold, and transmits the shell replacement signal to the warning unit. The steps for implementing the detection method include: Q1: After the valve body is stably positioned, the water injection pipe (20) rises under the action of the second motor (18) and extends into the valve body to perform liquid injection. The water pressure pushes the slider (11) to move. When the slider (11) comes into contact with the pressure sensor (12) and no liquid seeps out, it indicates that the hydraulic bearing capacity of the test piece meets the standard. Then, after the water pressure increases, the hydraulic threshold of the valve body is judged according to the change of pressure data. The steps for the analysis unit to determine abnormal sealing performance are as follows: M1: Preprocesses the acquired pressure data, sorts the data according to the acquisition time, calculates the mean and standard deviation, and then sets the fluctuation range based on the mean and standard deviation. If the pressure inside the casing rises to the rated value and remains at that value for a set duration, the acquired pressure data may not be within the fluctuation range. Within, for those outside the fluctuation range Number of internal pressure data If statistics are performed, If the sealing performance is abnormal, a sealing warning signal is generated and transmitted to the warning unit. This is a preset proportional coefficient. This represents the total number of data collection points at corresponding time points during the process. M2: If the preset low pressure threshold is greater than the initial sealing pressure value, it is determined that there is an abnormality in the fit between the sealing ring and the housing interface, and it is recorded as an abnormal fit of the interface; if the pressure data exceeds the set allowable range during the rated pressure maintenance period, it is determined that there is a small gap in the housing interface, and it is recorded as an abnormal crack in the interface. The analysis unit performs the following steps to analyze the remaining service life of the housing: N1: Initial fatigue damage to the shell , and These are the actual tested ultimate pressure threshold of the shell and the design ultimate pressure threshold of the shell, respectively. and These are the weighting coefficients for ultimate pressure deviation and structural uniformity, respectively. The goodness of fit of the linear relationship between the pressure and displacement curve; N2: Damage degree per pressure cycle , The fatigue life cycle count of the material under fluctuating operating pressure; the remaining service life of the housing. , The annual cumulative pressure cycle count under operating conditions; when When necessary, a housing replacement signal is generated and transmitted to the warning unit. This is the preset remaining service life threshold.

2. The method of claim 1, wherein: The explosion-proof box (3) is slidably connected to the front end of the explosion-proof door (6), and a rack (7) is installed on one side of the explosion-proof door (6). A first motor (8) is installed on the inner side of the explosion-proof box (3). A gear (9) is installed at the output end of the first motor (8) through a coupling. The gear (9) is rotatably installed on one side of the explosion-proof box (3), and the gear (9) meshes with the first motor (8) for transmission.

3. The method of claim 1, wherein: The detection mechanism includes an inner tube (10) installed at the output end of the cylinder (4). The inner tube (10) has an installation groove. A pressure sensor (12) is installed at the center of one end of the installation groove, and a slider (11) is inserted into the groove opening.

4. The method of claim 3, wherein: A compression spring (13) is installed between one end of the mounting groove and the slider (11). The compression spring (13) is sleeved around the pressure sensor (12). A first sealing ring (14) and a pressure plate (15) are respectively installed around the inner tube (10). The pressure plate (15) is located on one side of the first sealing ring (14).

5. The method of claim 1, wherein: A three-jaw caliper (16) is slidably connected to the linear motor (5). A first through groove is provided at the center of the three-jaw caliper (16), and a second through groove is provided at the bottom of the explosion-proof box (3) to match the first through groove.

6. The method of claim 5, wherein: The pressurizing mechanism includes a second motor (18) and a guide rod (19) installed at the lower end of the bracket (2). The output end of the second motor (18) is equipped with a lead screw through a coupling, and a water injection pipe (20) is provided directly below the first through groove and the second through groove. The other end of the water injection pipe (20) is connected to the output end of the water pump (17) through a hose.

7. The method of claim 6, wherein: Two ear plates are installed around the water injection pipe (20). One ear plate is threaded to the lead screw, and the other ear plate is inserted into the guide rod (19). A second sealing ring (21) is installed around the output end of the water injection pipe (20).

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