Bending and torsion test method for a multifunctional valve test bench

Abstract

The present invention discloses a bending and torsion test method for a multifunctional valve test bench, which relates to the field of valve testing technology. The method comprises: obtaining the working environment information of the shut-off valve to be tested, the working environment information including the working environment pressure and the working environment temperature, obtaining the target pressure item and the target temperature item; obtaining the pressure range based on the target pressure item, obtaining the pressure range value, and obtaining the temperature extreme value based on the target temperature item. The present invention introduces a gas circulation module to add gas and adjust the pressure inside the shut-off valve to be tested, simulating the circulation process of gas inside the valve. During the test, the gas circulation module is combined with the test bending moment sub-item and the test torque sub-item respectively to test the valve. By comparing the first state item and the second state item corresponding to the first test item and the second test item, the impact of gas leakage and restart after leakage on the shut-off valve can be clearly understood.

Description

Technical Field

[0001] The present invention relates to the technical field of valve testing, in particular to a bending and torsion testing method of a multifunctional valve testing bench. Background Art

[0002] The magnetic gas emergency shut-off valve is a safety device controlled by electromagnetic signals. It is used to quickly cut off the gas supply in an emergency to ensure safety. Its main feature is to control the opening and closing of the valve through an electromagnetic coil. When an emergency signal is received, the electromagnetic coil will generate a magnetic field to quickly close the valve, thereby cutting off the gas and preventing gas leaks or fire accidents. The electromagnetic gas emergency shut-off valve is subjected to bending and torsion tests mainly to ensure that it has sufficient mechanical strength and reliability in actual use, especially in environments where it may be subjected to external impact or vibration, to ensure that the valve material and structure can withstand mechanical deformation such as bending and torsion to avoid damage under accidental collision or mechanical stress.

[0003] Patent publication number CN104990699A discloses a bending and torsion test method for a multifunctional test bench for emergency shut-off valves. This method positions the emergency shut-off valve at a fulcrum by docking one end of the valve with the flange interface of a positioning fixture, while leaving the other end freely set. A braking mechanism is used to apply a force to the free end until the cut-off groove of the emergency shut-off valve breaks, thereby enabling testing of the emergency shut-off valve. Simultaneously, the flange interface and the emergency shut-off valve in the closed state form a closed cavity for simulating the environment of a gas tank or liquid tank. This closed cavity simulates the actual tank body, making the rigidity test environment of the emergency shut-off valve closer to the actual emergency state, thereby making the test results more accurate.

[0004] When testing the shut-off valve with the above and similar technical solutions, since the gas emergency shut-off valve is installed in the gas pipeline, and the gas pipeline is transporting gas, there may be some emergencies, such as gas leakage and restarting after the gas leakage. At this time, the pressure in the pipeline will drop instantly and then rise instantly. Conventional bending and torsion tests cannot simulate the impact of such emergencies on the shut-off valve, which in turn affects the bending and torsion detection accuracy of the shut-off valve. Summary of the Invention

[0005] The object of the present invention is to provide a bending and torsion test method for a valve multifunctional test bench to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solution: a bending and torsion test method of a multifunctional valve test bench, comprising:

[0007] Obtaining working environment information of the shut-off valve to be tested, the working environment information including working environment pressure and working environment temperature, and obtaining target pressure items and target temperature items;

[0008] A pressure range is obtained based on the target pressure item to obtain a pressure range value, an extreme temperature value is obtained based on the target temperature item, an upper temperature limit is set based on the extreme temperature value, and a lower temperature limit is set based on the data acquisition method, thereby obtaining a measured temperature item;

[0009] Obtain specification information of the shut-off valve to be tested to obtain a target specification item, the specification information including model information and bending and torsion test information of the shut-off valve corresponding to the model information; obtain matching bending moment and matching torque based on the target specification item to obtain a test bending moment item and a test torque item;

[0010] Dividing the test bending moment item and the test torque item into intervals to obtain at least two test bending moment sub-items and test torque sub-items;

[0011] Based on the pressure range value, gas is added and gas pressure is regulated inside the shut-off valve to be inspected through a gas adding component and a pressure regulating component to obtain a gas circulation module;

[0012] Based on the temperature measurement item, the shut-off valve to be tested is subjected to a bending test and a torsion test using the test bending moment sub-item and the test torque sub-item respectively to obtain a first test item. Based on the gas circulation module, the shut-off valve to be tested is tested in combination with the test bending moment sub-item and the test torque sub-item respectively to obtain a second test item. The status information of the shut-off valve to be tested is obtained to obtain a first status item and a second status item. The first status item is compared with the second status item, thereby realizing the detection of gas leakage and the impact of restart after leakage on the shut-off valve.

[0013] Furthermore, the method for obtaining the target pressure item includes:

[0014] Obtain the working adapter pipeline information of the shut-off valve to be tested and obtain the target pipeline item;

[0015] The working property scenario is obtained based on the target pipeline item to obtain the target scenario item, and the pressure level of the target pipeline item is obtained at the same time. The working environment pressure of the shut-off valve to be tested is obtained based on the target scenario item and the pressure level to obtain the target pressure item.

[0016] Furthermore, the method for obtaining the test bending moment term and the test torque term includes:

[0017] Acquire matching detection information by data acquisition to obtain bending moment detection information and torque detection information;

[0018] Based on the target specification items, the adaptation information corresponding to the target specification items in the bending moment detection information and the torque detection information is obtained, and then the adaptation bending moment limit value and the adaptation torque limit value are obtained. The bending test and the torsion test are performed respectively with the adaptation bending moment limit value and the adaptation torque limit value, and then the test bending moment item and the test torque item are obtained.

[0019] Furthermore, the method for obtaining the test bending moment sub-item and the test torque sub-item includes:

[0020] Based on the target specification item, matching detection information is obtained, the matching detection information including the holding time, the set growth value, the growth value being a fixed percentage value, and the fixed time item being obtained based on the combination of the growth value and the holding time;

[0021] Setting a cutting value, where the cutting value is a fixed percentage, and segmenting the test bending moment item and the test torque item based on the cutting value, thereby obtaining at least two bending moment segment ranges and torque segment ranges;

[0022] Based on the combination of the bending moment segment range and the torque segment range with the fixed time length item, at least two test bending moment sub-items and test torque sub-items are obtained.

[0023] Furthermore, the method for obtaining the gas circulation module includes:

[0024] Based on the pressure range value, the maximum pressure value and the minimum pressure value are obtained, the pressure span between the maximum pressure value and the minimum pressure value is obtained, and the pressure difference item is obtained;

[0025] At least two span measurement values ​​are set, the span measurement values ​​are fixed time values, and the pressure difference items are limited based on the span measurement values, and the at least two pressure difference items are limited to obtain at least two limiting modules;

[0026] Based on the defined module, pressure regulation is performed through a pressure regulating component to obtain at least two gas circulation items, and the gas circulation items are combined to obtain a gas circulation module.

[0027] Furthermore, the method for obtaining the first test item includes:

[0028] Obtaining a temperature range difference based on the measured temperature item, splitting the temperature range difference to obtain at least two temperature intervals, sorting the temperature intervals, and assigning labels to obtain temperature interval items;

[0029] The torsion test of the shut-off valve to be tested is performed by sequentially using the sorted temperature intervals of the temperature interval item as the temperature limit and using the test torque sub-item as the benchmark test force to obtain a torsion test set;

[0030] Obtain the first sub-item information of the test bending moment sub-item as the test detection item, obtain the valve port image information of the shut-off valve to be tested, obtain the valve port image item, set the target number of test points, and evenly distribute the test points on the valve port image item;

[0031] Taking the direction of the test point as the test direction and the test items as the benchmark test force, a bending test is performed on the shut-off valve to be tested to obtain a bending test set;

[0032] The test direction corresponding to the test point with the largest deformation data in the bending test set is obtained as the main test direction. The sorted temperature ranges of the temperature range items are used as temperature limits, and the sequence sub-item information of the test bending moment sub-item is used as the benchmark test force to perform a bending test on the shut-off valve to be tested, thereby obtaining a filtered bending test set.

[0033] The torsion test set is combined with the screening bending test set to obtain the first test item.

[0034] Furthermore, the method for obtaining the second test item includes:

[0035] Use the sorted temperature range of the temperature range item as the temperature limit, set the cycle interval, use the gas cycle module as the cycle limit, and use the test torque sub-item as the benchmark test force to perform a torsion test on the shut-off valve to be tested, and obtain a torque update test set;

[0036] The test direction corresponding to the test point with the largest deformation data in the bending test set is obtained as the main test direction. The sorted temperature intervals of the temperature interval items are used as temperature limits. The gas cycle module is used as the cycle limit based on the cycle interval. The sequence sub-item information of the test bending moment sub-item is used as the benchmark test force to perform a bending test on the shut-off valve to be tested, and a screening bending moment update test set is obtained.

[0037] The torque update test set is combined with the screening bending moment update test set to obtain the second test item.

[0038] Furthermore, the state information includes deformation information, and the method for obtaining the first state item includes:

[0039] Based on the first test item, the bending deformation information and the torsional deformation information of the shut-off valve to be tested are obtained by a deformation shooting and obtaining device to obtain a first bending state set and a first torsional state set, which are combined to obtain a first state item.

[0040] Furthermore, the status information also includes gas leakage information, and the method for obtaining the second status item includes:

[0041] Based on the second test item, the bending deformation information and the torsional deformation information of the shut-off valve to be tested are obtained by a deformation photographing and obtaining device, a second bending state set and a second torsional state set are obtained, and the second deformation item is obtained by combining them;

[0042] The gas leakage information of the shut-off valve to be detected is obtained by using a gas sensing device, and a bending leakage set and a torsion leakage set are obtained, which are combined to obtain a leakage item;

[0043] The second deformation term is combined with the leakage term to obtain a second state term.

[0044] Compared with the prior art, the present invention has the following beneficial effects:

[0045] The bending and torsion test method of the valve multifunctional test bench introduces a gas circulation module to add gas and adjust the pressure inside the shut-off valve to be tested, simulating the circulation process of gas inside the valve. During the test, the gas circulation module is combined with the test bending moment sub-item and the test torque sub-item to test the valve. By comparing the first state item and the second state item corresponding to the first test item and the second test item, the impact of gas leakage and restart after leakage on the shut-off valve can be clearly understood, making the valve performance evaluation more comprehensive.

[0046] At the same time, by comprehensively acquiring the working environment information of the shut-off valve to be tested, including the working environment pressure and temperature, its actual working scene is accurately simulated. For the working environment pressure, the target pressure item is determined based on the working adaptation pipeline information, working nature scenario and pressure level of the shut-off valve. For the working environment temperature, the target temperature item is determined by setting the acquisition threshold, so that the subsequent bending and torsion tests are more in line with the actual situation.

[0047] Not only that, after obtaining the matching bending moment and matching torque of the shut-off valve to be tested, the test bending moment item and the test torque item are divided into intervals. By setting the growth value and cutting value, multiple test bending moment sub-items and test torque sub-items are obtained, and the fixed time item is determined in combination with the holding time, which can provide a detailed understanding of the performance changes of the valve in each bending moment and torque interval. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 It is a schematic diagram of the overall process of the present invention;

[0049] Figure 2 A schematic diagram of a process for obtaining target pressure and target temperature items of the present invention;

[0050] Figure 3 This is a schematic diagram of a torsion test of the present invention;

[0051] Figure 4 This is a schematic diagram of a bending test of the present invention;

[0052] Figure 5 This is a schematic diagram of the position distribution of test points 1 to 6 of the present invention. DETAILED DESCRIPTION

[0053] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0054] In the quality control process of shut-off valves, bending and torsion tests are commonly used detection methods. However, due to the particularity of the operating environment of gas pipelines, conventional bending and torsion tests have certain limitations in simulating actual working conditions, which may lead to deviations in detection accuracy. Gas pipelines are not always in a stable state during the process of transporting gas. Gas leakage is a common emergency. Once a leak occurs, the pressure in the pipeline will drop rapidly. However, after the leak is controlled and gas transportation is restarted, the pressure in the pipeline will rise rapidly in a short period of time. This dynamic process of sudden drop and rise in pressure will cause significant impact and stress changes to the gas pipeline and its ancillary equipment, including the shut-off valve. Conventional bending and torsion tests usually use static loading, that is, applying bending moment or torque to the shut-off valve at a slow and constant speed, and monitoring its deformation and sealing performance. This static loading method cannot accurately simulate the dynamic impact caused by the sudden change in pressure in the gas pipeline. Under actual working conditions, the shut-off valve may be subjected to huge instantaneous stress, which may exceed its static strength limit, causing micro cracks or deformation in the valve body, thereby affecting its sealing performance and service life, and further affecting the bending and torsion detection accuracy of the shut-off valve. The present application provides a bending and torsion test method for a valve multi-functional test bench. By introducing a gas circulation module, gas is added and pressure is adjusted inside the shut-off valve to be tested, simulating the circulation process of gas inside the valve. During the test, the gas circulation module is combined with the test bending moment sub-item and the test torque sub-item respectively to test the valve. By comparing the first state item and the second state item corresponding to the first test item and the second test item, the impact of gas leakage and restart after leakage on the shut-off valve can be clearly understood, making the valve performance evaluation more comprehensive, and providing a more valuable reference for valve design improvement and practical application, ensuring the safety and reliability of the valve in actual use. Figure 1 As shown, steps S100-S800 are included.

[0055] Step S100: Acquire the working environment information of the shut-off valve to be tested.

[0056] It should be noted that if Figure 2As shown, the working environment information includes the working environment pressure and the working environment temperature, and the target pressure item and the target temperature item are obtained. The method for obtaining the target pressure item includes: obtaining the working adapter pipeline information of the shut-off valve to be detected to obtain the target pipeline item; the working adapter pipeline information includes the connection pipeline information with the shut-off valve to be detected, including material information and model information, and then obtaining the target pipeline item, based on the target pipeline item, obtaining the working nature scenario to obtain the target scenario item, the working nature scenario includes residential household pipelines, urban gas distribution pipelines, industrial park main pipelines, etc., and then obtaining the target scenario item, and at the same time obtaining the target pipeline item pressure level, the pressure levels include low-pressure pipelines, medium-pressure pipelines, sub-high-pressure pipelines, high-pressure B-level pipelines and high-pressure A-level pipelines, and obtaining the working environment pressure of the shut-off valve to be detected based on the target scenario item and the pressure level to obtain the target pressure item.

[0057] It should be noted that the method for obtaining the target temperature item includes: setting an acquisition threshold, the acquisition threshold is one year, obtaining the working environment temperature of the shut-off valve to be detected based on the acquisition threshold, the working environment temperature includes the temperature upper limit value and the temperature lower limit value, and obtaining the actual working environment temperature based on the temperature upper limit value and the temperature lower limit value to obtain the target temperature item.

[0058] During the specific implementation process, it is necessary to obtain the working environment pressure of a gas shut-off valve A during operation. At this time, the working adapter pipeline information of the shut-off valve A is obtained as seamless steel pipe material, in line with the GB / T9711 standard, model DN150, wall thickness 6mm, and pressure resistance level ≥1.6MPa, and then the target pipeline item of the shut-off valve A is obtained. It is further obtained that the working nature scenario of the target pipeline item is the industrial park main pipeline, and its purpose is to supply natural gas to the glass factory melting furnace, and then the target scenario item is obtained. At the same time, the pressure level of the target pipeline item is obtained as a sub-high pressure pipeline. The standard is based on: GB50028-2020 stipulates that the industrial park main pipeline is a sub-high pressure pipeline. Based on the target scenario item and the pressure level, the working environment pressure of the shut-off valve to be tested is 0.2-0.4MPa, and then the target pressure item is obtained.

[0059] Step S200: Obtain the pressure range to obtain the pressure range value, and set the upper temperature limit and the lower temperature limit.

[0060] It should be noted that the pressure range is obtained based on the target pressure item to obtain the pressure range value. After obtaining the target pressure item of the shut-off valve to be tested, the pressure range value can be obtained based on the target pressure item. After obtaining the target temperature item of the shut-off valve to be tested, the maximum temperature value is obtained based on the target temperature item. The upper temperature limit is set based on the maximum temperature value. The lower temperature limit is set based on the data acquisition method, and then the measured temperature item is obtained. The lower temperature limit is the lower temperature limit value set for the shut-off valve to be tested during the test.

[0061] Step S300: Acquire the matching bending moment and matching torque of the shut-off valve to be tested.

[0062] It should be noted that the specification information of the shut-off valve to be tested is obtained to obtain the target specification item, the specification information includes model information and the shut-off valve bending and torsion test information corresponding to the model information, and the matching bending moment and matching torque are obtained based on the target specification item to obtain the test bending moment item and the test torque item. The method for obtaining the test bending moment item and the test torque item includes: obtaining the matching detection information by data acquisition to obtain the bending moment detection information and the torque detection information; based on the target specification item, obtaining the adaptation information corresponding to the target specification item in the bending moment detection information and the torque detection information, and then obtaining the adaptation bending moment limit value and the adaptation torque limit value, and performing bending test and torsion test with the adaptation bending moment limit value and the adaptation torque limit value respectively, and then obtaining the test bending moment item and the test torque item.

[0063] In the specific implementation process, when it is necessary to perform bending and torsion tests on the shut-off valve to be tested, the matching test information is obtained through data acquisition as shown in Table 1 and Table 2:

[0064] Table 1

[0065]

[0066] Then, torque detection information is obtained;

[0067] Table 2

[0068]

[0069] Then the bending moment detection information is obtained.

[0070] Step S400: Divide the test bending moment item and the test torque item into intervals.

[0071] It should be noted that the test bending moment item and the test torque item are divided into intervals to obtain at least two test bending moment sub-items and test torque sub-items. The method for obtaining the test bending moment sub-items and the test torque sub-items includes: based on the target specification item, obtaining matching detection information, the matching detection information includes holding time, setting a growth value, the growth value is a fixed percentage value, the growth value is 150%, and obtaining a fixed time item based on the combination of the growth value and the holding time; setting a cutting value, the cutting value is a fixed percentage, the cutting value is 20%, and based on the cutting value, the test bending moment item and the test torque item are segmented and cut, thereby obtaining at least two bending moment segmentation ranges and torque segmentation ranges; based on the bending moment segmentation range and the torque segmentation range, respectively combined with the fixed time item, at least two test bending moment sub-items and test torque sub-items are obtained.

[0072] In the specific implementation process, it is necessary to perform torsion and bending tests on a gas shut-off valve B. The nominal size of the gas shut-off valve B is DN50. At this time, the test bending moment item and the test torque item obtained are 1100 and 250 respectively. The matching detection information obtained is 10s, that is, the holding time after reaching the test bending moment item and the test torque is 10s. According to the set growth value of 50%, the fixed time item obtained is 15s. According to the set cutting value, the test bending moment item and the test torque item are segmented and cut respectively to obtain 10 bending moment segment ranges and torque segment ranges, among which the bending moment segment ranges are: 0-110, 110-220, 220-330, 330-4 The torque segment ranges are: 0-25, 25-50, 50-75, 75-100, 100-125, 125-150, 150-175, 175-200, 200-225, 225-250. The bending moment segment range and the torque segment range are combined with the fixed time items respectively. That is, when performing the bending test, when it reaches 110 N·m, it is maintained for 15s; when it reaches 220 N·m, it is maintained for 15s, and so on, 10 test bending moment sub-items and 10 test torque sub-items are obtained.

[0073] Step S500: Adding gas to the interior of the shut-off valve to be inspected and regulating the gas pressure to obtain a gas circulation module.

[0074] It should be noted that, based on the pressure range value, gas is added and gas pressure is regulated inside the shut-off valve to be inspected through the gas adding component and the pressure regulating component to obtain a gas circulation module. The method for obtaining the gas circulation module includes: obtaining an extreme high pressure value and an extreme low pressure value based on the pressure range value, obtaining the pressure span between the extreme high pressure value and the extreme low pressure value, and obtaining a pressure difference item; setting two span measurement values, the span measurement values ​​are fixed time values, and the span measurement values ​​are 6s and 3s respectively, and limiting the pressure difference item based on the span measurement value, limiting at least two pressure difference items, and obtaining at least two limiting modules; based on the limiting module, pressure regulation is performed through the pressure regulating component to obtain at least two gas circulation items, and the gas circulation items are combined to obtain a gas circulation module.

[0075] In a specific implementation process, when the pressure range value of a gas shut-off valve C is obtained to be 0-0.4MPa, the maximum pressure value is 0.4MPa, the minimum pressure value is 0MPa, and the pressure span is 0.4MPa. According to the set span measurement values ​​of 6s and 3s, the two pressure difference items obtained are: at 6s, the pressure is reduced from 0.4MPa to 0MPa or the pressure is increased from 0MPa to 0.4MPa; at 3s, the pressure is reduced from 0.4MPa to 0MPa or the pressure is increased from 0MPa to 0.4MPa, thereby obtaining two limiting modules. Based on the limiting modules, pressure regulation is performed through a pressure regulating component, thereby obtaining at least two gas circulation items, and the gas circulation items are combined to obtain a gas circulation module.

[0076] Step S600: performing a bending test and a torsion test on the shut-off valve to be inspected using the bending moment test sub-item and the torque test sub-item.

[0077] It should be noted that if Figure 3-Figure 4 As shown, based on the measured temperature item, the bending test and torsion test are performed on the shut-off valve to be inspected using the test bending moment sub-item and the test torque sub-item respectively. During the bending test, pipeline 1 and pipeline 2 are set, and the shut-off valve to be inspected is connected to pipeline 1 and pipeline 2 respectively, pipeline 1 is fixed with a fixing device, and a bending moment is applied to pipeline 2; during the torsion test, pipeline 1 and pipeline 2 are set, and the shut-off valve to be inspected is connected to pipeline 1 and pipeline 2 respectively, and pipeline 1 is fixed with a fixing device, and a torque is applied to pipeline 2, thereby obtaining the first test item.

[0078] It should be noted that the method for obtaining the first test item includes: obtaining the temperature range difference based on the measured temperature item, splitting the temperature range difference to obtain at least two temperature intervals, sorting the temperature intervals, and assigning labels to obtain temperature interval items; sequentially using the sorted temperature intervals of the temperature interval items as temperature limits, and using the test torque sub-items as the benchmark test forces to perform a torsion test on the shut-off valve to be tested, to obtain a torsion test set; obtaining the first sub-item information of the test bending moment sub-item as a test detection item, obtaining the valve port image information of the shut-off valve to be tested, obtaining the valve port image item, and setting the target number The test points are evenly distributed on the valve port image item; the direction of the test point is taken as the test direction, and the test detection items are used as the benchmark test force to perform the bending test of the shut-off valve to be tested to obtain a bending test set; the test direction corresponding to the test point with the largest deformation data in the bending test set is obtained as the main benchmark test direction, and the sorted temperature range of the temperature range item is used as the temperature limit in turn, and the sequence sub-item information of the test bending moment sub-item is used as the benchmark test force to perform the bending test of the shut-off valve to be tested to obtain a screened bending test set; the torsion test set is combined with the screened bending test set to obtain the first test item.

[0079] In the specific implementation process, Figure 5 As shown, a gas shut-off valve D needs to be subjected to a bending test and a torsion test. The measured temperature item of the shut-off valve D is obtained to be -40°C to 60°C, and the temperature range difference is obtained. The temperature range difference is split to obtain at least two temperature intervals, namely -40°C to 0°C and 0°C to 60°C, which are labeled as interval 1 and interval 2 respectively. The nominal size of the shut-off valve D is DN50. At this time, the matching detection information obtained is 10s, that is, the holding time after reaching the test bending moment item and the test torque is 10s. According to the set growth value of 150%, the fixed time item obtained is 15s. The test bending moment item and the test torque item are segmented according to the set cutting value. 10 bending moment segment ranges and torque segment ranges are obtained, wherein the bending moment segment ranges are: 0-110, 110-220, 220-330, 330-440, 440-550, 550-660, 660-770, 770-880, 880-990, 990-1100, and the torque segment ranges are: 0-25, 25-50, 50-75, 75-100, 100-125, 125-150, 150-175, 175-200, 200-225, 225-250. Based on the combination of the bending moment segment range and the torque segment range with the fixed time length, that is, when performing the bending test, 110N· When it reaches 220 N·m, hold it for 15s. When it reaches 220 N·m, hold it for 15s, and so on, and then 10 test bending moment sub-items and 10 test torque sub-items are obtained. Interval 1 and interval 2 are used as temperature limits in turn, and the test torque sub-item is used as the benchmark test force to perform a torsion test on the shut-off valve to be tested, and a torsion test set is obtained. At this time, the first sub-item information of the test bending moment sub-item is obtained as the test detection item, that is, 110 N·m. The valve port image information of the shut-off valve to be tested is obtained to obtain the valve port image item. The target number of test points is set to 6, and the test points are evenly distributed on the valve port image item, and are numbered as test point 1, test point 2, test point 3, test point 4, test point 5, and test point 6 respectively. 6. Take the direction of the test point as the test direction, and use the test detection items as the benchmark test force to perform a bending test on the shut-off valve to be tested to obtain a bending test set. Obtain the test direction corresponding to the test point with the largest deformation data in the bending test set as the main benchmark test direction, where the deformation data of test point 1, test point 2, test point 3, test point 4, and test point 5 are all non-deformed, and the deformation data of test point 6 is 0.001mm. At this time, take the test direction corresponding to test point 6 as the main benchmark test direction, and use the sorted temperature range of the temperature range item as the temperature limit in turn, and use the sequence sub-item information of the test bending moment sub-item as the benchmark test force to perform a bending test on the shut-off valve to be tested to obtain a filtered bending test set.

[0080] Step S700: Based on the gas circulation module, the test bending moment sub-item and the test torque sub-item are combined to test the shut-off valve to be tested.

[0081] It should be noted that the second test item is obtained according to the test results, and the method for obtaining the second test item includes: using the sorted temperature interval of the temperature interval item as the temperature limit, setting the cycle interval to 7.5s, using the gas circulation module as the cycle limit, and using the test torque sub-item as the benchmark test force to perform a torsion test on the shut-off valve to be tested, and obtain a torque update test set; obtaining the test direction corresponding to the test point with the largest deformation data in the bending test set as the main benchmark test direction, and using the sorted temperature interval of the temperature interval item as the temperature limit, using the gas circulation module as the cycle limit based on the cycle interval, and using the sequence sub-item information of the test bending moment sub-item as the benchmark test force to perform a bending test on the shut-off valve to be tested, and obtain a screened bending moment update test set; the torque update test set is combined with the screened bending moment update test set to obtain the second test item.

[0082] In the specific implementation process, it is necessary to perform a bending test and a torsion test on a gas shut-off valve D. When the cycle interval is 7.5s and the pressure range value is 0-0.4MPa, according to the set span measurement values ​​of 6s and 3s, the two pressure difference items obtained are: at 6s, the pressure is reduced from 0.4MPa to 0MPa or the pressure is increased from 0MPa to 0.4MPa; at 3s, the pressure is reduced from 0.4MPa to 0MPa or the pressure is increased from 0MPa to 0.4MPa. That is, within the cycle interval of 7.5s, when the fixed time item is 15s, the cycle of the two pressure difference items can be completed. At this time, the gas cycle The module is used as a loop limit, and the test torque sub-item is used as the benchmark test force to perform a torsional test on the shut-off valve to be tested, so as to obtain a torque update test set; the test direction corresponding to the test point with the largest deformation data in the bending test set is still obtained as the main benchmark test direction, and the test direction corresponding to test point 6 is used as the main benchmark test direction. The sorted temperature intervals of the temperature interval items are used as temperature limits in turn, and the gas circulation module is used as a loop limit based on the loop interval. The sequence sub-item information of the test bending moment sub-item is used as the benchmark test force to perform a bending test on the shut-off valve to be tested, so as to obtain a filtered bending moment update test set; the torque update test set is combined with the filtered bending moment update test set to obtain the second test item.

[0083] Step S800: Acquire status information of the shut-off valve to be detected, and obtain a first status item and a second status item.

[0084] It should be noted that the status information includes deformation information, and the method for obtaining the first status item includes: based on the first test item, obtaining the bending deformation information and torsional deformation information of the shut-off valve to be tested through a deformation shooting and acquisition device, the deformation shooting and acquisition device is a laser displacement meter, and the first bending state set and the first torsional state set are obtained, and the first status item is obtained by combining them.

[0085] It should be noted that the status information also includes gas leakage information. The method for obtaining the second status item includes: based on the second test item, obtaining the bending deformation information and torsional deformation information of the shut-off valve to be tested through the deformation shooting acquisition device, obtaining the second bending state set and the second torsional state set, and combining them to obtain the second deformation item; obtaining the gas leakage information of the shut-off valve to be tested through the gas sensing device, obtaining the bending leakage set and the torsional leakage set, and combining them to obtain the leakage item; the second deformation item and the leakage item are combined to obtain the second status item, thereby realizing the detection of gas leakage and the impact of restart after leakage on the shut-off valve.

[0086] In the specific implementation process, the first state item results of the bending test and the torsion test on a gas shut-off valve D are shown in Table 3:

[0087] Table 3

[0088]

[0089] Then the first state item is obtained;

[0090] The results of the second state item of the bending test and torsion test on a gas shut-off valve D are shown in Table 4:

[0091] Table 4

[0092]

[0093] Then the second state item is obtained;

[0094] By comparing the first state item with the second state item, it was found that when the bending moment and torsion tests were performed after the gas circulation module was added, when the bending moment reached 1100 N·m and the torque reached 250 N·m, the gas shut-off valve D was deformed by 0.1 mm compared to when the gas circulation module was not added, thereby realizing the detection of gas leakage and the impact of restart after leakage on the shut-off valve.

[0095] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is limited by the accompanying embodiments and their equivalents.

Claims

1. A bending and torsion test method for a valve multifunctional test bench, comprising: Obtaining working environment information of the shut-off valve to be tested, the working environment information including working environment pressure and working environment temperature, and obtaining a target pressure item and a target temperature item; A pressure range is obtained based on the target pressure item to obtain a pressure range value, an extreme temperature value is obtained based on the target temperature item, an upper temperature limit is set based on the extreme temperature value, and a lower temperature limit is set based on the data acquisition method, thereby obtaining a measured temperature item; Its characteristics are: Obtain specification information of the shut-off valve to be tested to obtain a target specification item, the specification information including model information and bending moment and torque test information of the shut-off valve corresponding to the model information; obtain matching bending moment and matching torque based on the target specification item to obtain a test bending moment item and a test torque item; Dividing the test bending moment item and the test torque item into intervals to obtain at least two test bending moment sub-items and test torque sub-items; Based on the pressure range value, gas is added and gas pressure is regulated inside the shut-off valve to be inspected through a gas adding component and a pressure regulating component to obtain a gas circulation module; Based on the temperature measurement item, the bend test and torsion test of the shut-off valve to be detected are performed using the test bending moment sub-item and the test torque sub-item respectively to obtain a first test item. Based on the gas circulation module, the shut-off valve to be detected is tested in combination with the test bending moment sub-item and the test torque sub-item respectively to obtain a second test item. The status information of the shut-off valve to be detected is obtained to obtain a first status item and a second status item. The first status item is compared with the second status item to obtain the impact of gas leakage and restart after leakage on the shut-off valve.

2. The bending and torsion test method of a multifunctional valve test bench according to claim 1, characterized in that: The method for obtaining the target pressure item includes: Obtain the working adapter pipeline information of the shut-off valve to be tested and obtain the target pipeline item; Based on the target pipeline item, the working nature scenario is obtained to obtain the target scenario item. The working nature scenario is used to represent the working nature of the pipeline adapted to the shut-off valve to be tested, including residential household pipelines, urban gas distribution pipelines, and industrial park main pipelines. At the same time, the pressure level of the target pipeline item is obtained. The pressure level is used to represent the working pressure of the pipeline adapted to the shut-off valve to be tested, including low-pressure pipelines, medium-pressure pipelines, sub-high-pressure pipelines, high-pressure Class B pipelines, and high-pressure Class A pipelines. Based on the target scenario item and the pressure level, the working environment pressure of the shut-off valve to be tested is obtained to obtain the target pressure item.

3. The bending and torsion test method of a multifunctional valve test bench according to claim 1, characterized in that: The method for obtaining the test bending moment term and the test torque term includes: Acquire matching detection information by data acquisition to obtain bending moment detection information and torque detection information; Based on the target specification items, the adaptation information corresponding to the target specification items in the bending moment detection information and the torque detection information is obtained, and then the adaptation bending moment limit value and the adaptation torque limit value are obtained. The bending test and the torsion test are performed respectively with the adaptation bending moment limit value and the adaptation torque limit value, and then the test bending moment item and the test torque item are obtained.

4. The bending and torsion test method of a multifunctional valve test bench according to claim 1 is characterized in that: The method for obtaining the test bending moment sub-item and the test torque sub-item includes: Based on the target specification item, matching detection information is obtained, and the matching detection information includes a holding time, where the holding time is a fixed time value, and a set growth value, where the growth value is a fixed percentage value. Based on the result of the growth value and the holding time, the holding time extension information of the matching detection information is obtained, and then the fixed time item is obtained; Setting a cutting value, where the cutting value is a fixed percentage, and segmenting the test bending moment item and the test torque item based on the cutting value, wherein the test bending moment item and the test torque item are test data for a bending test and a torsion test, and the test data are evenly segmented based on the cutting value, thereby obtaining at least two bending moment segmentation ranges and torque segmentation ranges; Based on the combination of the bending moment segment range and the torque segment range with the fixed time length item, at least two test bending moment sub-items and test torque sub-items are obtained.

5. The bending and torsion test method of a multifunctional valve test bench according to claim 1 is characterized in that: The method for obtaining the gas cycle module includes: Based on the pressure range value, the maximum pressure value and the minimum pressure value are obtained, the pressure span between the maximum pressure value and the minimum pressure value is obtained, and the pressure difference item is obtained; At least two span measurement values ​​are set, the span measurement values ​​are fixed time values, and the pressure difference items are limited based on the span measurement values, and the at least two pressure difference items are limited to obtain at least two limiting modules; Based on the defined module, pressure regulation is performed through a pressure regulating component to obtain at least two gas circulation items, and the gas circulation items are combined to obtain a gas circulation module.

6. The bending and torsion test method of a multifunctional valve test bench according to claim 1, characterized in that: The method for obtaining the first test item includes: Obtaining a temperature range difference based on the measured temperature item, splitting the temperature range difference to obtain at least two temperature intervals, sorting the temperature intervals, and assigning labels to obtain temperature interval items; The torsion test of the shut-off valve to be tested is performed by sequentially using the sorted temperature intervals of the temperature interval item as the temperature limit and using the test torque sub-item as the benchmark test force to obtain a torsion test set; Obtain the first sub-item information of the test bending moment sub-item as the test detection item, obtain the valve port image information of the shut-off valve to be tested, obtain the valve port image item, set the target number of test points, and evenly distribute the test points on the valve port image item; Taking the direction of the test point as the test direction and the test items as the benchmark test force, a bending test is performed on the shut-off valve to be tested to obtain a bending test set; The test direction corresponding to the test point with the largest deformation data in the bending test set is obtained as the main test direction. The sorted temperature ranges of the temperature range items are used as temperature limits, and the sequence sub-item information of the test bending moment sub-item is used as the benchmark test force to perform a bending test on the shut-off valve to be tested, thereby obtaining a filtered bending test set. The torsion test set is combined with the screening bending test set to obtain the first test item.

7. The bending and torsion test method of a multifunctional valve test bench according to claim 6, characterized in that: The method for obtaining the second test item includes: Use the sorted temperature range of the temperature range item as the temperature limit, set the cycle interval, use the gas cycle module as the cycle limit, and use the test torque sub-item as the benchmark test force to perform a torsion test on the shut-off valve to be tested, and obtain a torque update test set; The test direction corresponding to the test point with the largest deformation data in the bending test set is obtained as the main test direction. The sorted temperature intervals of the temperature interval items are used as temperature limits. The gas cycle module is used as the cycle limit based on the cycle interval. The sequence sub-item information of the test bending moment sub-item is used as the benchmark test force to perform a bending test on the shut-off valve to be tested, and a screening bending moment update test set is obtained. The torque update test set is combined with the screening bending moment update test set to obtain the second test item.

8. The bending and torsion test method of a multifunctional valve test bench according to claim 1, characterized in that: The state information includes deformation information, and the method for obtaining the first state item includes: Based on the first test item, the bending deformation information and the torsional deformation information of the shut-off valve to be tested are obtained by a deformation shooting and obtaining device to obtain a first bending state set and a first torsional state set, which are combined to obtain a first state item.

9. The bending and torsion testing method of a multifunctional valve test bench according to claim 1, characterized in that: The state information also includes gas leakage information. The method for obtaining the second state item includes: Based on the second test item, the bending deformation information and the torsional deformation information of the shut-off valve to be tested are obtained by a deformation photographing and obtaining device, a second bending state set and a second torsional state set are obtained, and the second deformation item is obtained by combining them; The gas leakage information of the shut-off valve to be detected is obtained by using a gas sensing device, and a bending leakage set and a torsion leakage set are obtained, which are combined to obtain a leakage item; The second deformation term is combined with the leakage term to obtain a second state term.

Images