Method for testing sealing performance of flat gate valve under high pressure difference working condition

Abstract

The invention is suitable for the technical field of flat gate valves, and particularly relates to a method for testing the sealing performance of a flat gate valve under a high-pressure-difference working condition. Wherein the pressure difference information comprises a plurality of pieces of opening difference information; obtaining analysis information based on the pressure difference information; wherein the analysis information comprises opening degree analysis information and service life prediction information; obtaining a test report based on the analysis information; wherein the test report reflects the sealing performance of the flat gate valve. According to the method for testing the sealing performance of the flat gate valve under the high-pressure-difference working condition, the situation that the contact pressure of the sealing surface is possibly smaller than the fluid pressure difference of the two sides of the gate plate in the high-pressure-difference working condition and in the environment where the flat gate valve needs to be frequently opened and closed, and consequently macroscopic leakage or microscopic leakage is caused can be improved; and high-speed jet flow generated when a medium passes through a sealing surface gap is easy to cause cavitation abrasion, so that the sealing performance of the gate valve is influenced.

Description

Technical Field

[0001] The present application belongs to the technical field of flat gate valves, and in particular relates to a method for testing the sealing performance of flat gate valves under high-pressure differential conditions. Background Art

[0002] The flat gate valve is a valve with a parallel gate as the opening and closing member. Its core function is to control the on-off of the medium through the linear motion of the gate. It is widely used in high-pressure, high-temperature and particle-containing medium pipelines in the petroleum, natural gas, chemical, electric power and other industries.

[0003] However, when the flat gate valve is operated under high pressure difference conditions and needs to be opened and closed frequently, the contact pressure of the sealing surface may be less than the fluid pressure difference on both sides of the gate during the opening or closing process, resulting in macro leakage (fluid force directly pushes the sealing surface open) or micro leakage (insufficient contact pressure on the sealing surface, unable to flatten the microscopic unevenness of the surface (such as rough peaks and valleys), resulting in leakage from tiny gaps). In addition, the high-speed jet generated by the medium passing through the gap of the sealing surface can easily cause cavitation wear, thereby affecting the sealing performance of the gate valve. Summary of the Invention

[0004] An embodiment of the present application provides a method for testing the sealing performance of a flat gate valve under high-pressure differential working conditions, which can improve the problem that when the flat gate valve is operating under high-pressure differential working conditions and requires frequent opening and closing, the contact pressure of the sealing surface may be smaller than the fluid pressure difference on both sides of the gate plate, thereby causing macroscopic leakage or microscopic leakage, and the high-speed jet generated by the medium passing through the gap of the sealing surface is likely to cause cavitation wear, thereby affecting the sealing performance of the gate valve.

[0005] In a first aspect, an embodiment of the present application provides a method for testing the sealing performance of a flat gate valve under high pressure differential conditions, comprising: Obtaining differential pressure information; wherein the differential pressure information includes multiple differential opening information, the differential opening information including the opening of the gate of the flat gate valve, the pressure differential corresponding to the opening, and the residence time of the gate at the opening, the pressure differential being the difference between the upstream pressure and the downstream pressure, the upstream pressure being the pressure at the input end of the flat gate valve, the downstream pressure being the pressure at the output end of the flat gate valve, and the opening being the vertical height of the gate from the valve seat sealing surface when the gate moves; Obtaining analysis information based on the pressure differential information; wherein the analysis information includes opening analysis information and life prediction information, wherein the opening analysis information reflects whether leakage may occur when the slab gate valve changes its opening within an opening stroke, wherein the opening stroke is the distance the gate plate moves when switching from a fully closed state to a fully open state; and the life prediction information includes a predicted number of opening and closing times of the slab gate valve and information reflecting whether the number of opening and closing times of the slab gate valve meets expectations; A test report is obtained based on the analysis information; wherein the test report reflects the sealing performance of the flat gate valve.

[0006] The above technical solutions in the embodiments of the present application have at least the following technical effects: The embodiment of the present application provides a method for testing the sealing performance of a flat gate valve under high-pressure differential operating conditions. This method first obtains pressure differential information including multiple opening differential information, covering all openings (opening strokes) of the gate valve from "fully closed" to "fully open," and obtains the pressure differential and dwell time of the gate valve at different openings, providing data support for analyzing the sealing performance of the gate valve. Then, based on the pressure differential information, analysis information including opening analysis information and life prediction information is obtained. The method analyzes whether macroscopic or microscopic leakage occurs during the opening or closing process of the gate valve due to the contact pressure of the sealing surface being less than the fluid pressure differential on both sides of the gate plate. The method also analyzes the impact of the actual load conditions of the gate valve under high-pressure differential operating conditions on the gate valve life, allowing for reasonable scheduling of maintenance time to avoid leakage caused by the gate valve being opened and closed more times than expected. A test report reflecting the sealing performance of the flat gate valve is then obtained based on the analysis information, visually displaying the sealing performance of the gate valve and providing a basis for users to further analyze and judge the sealing performance of the gate valve.

[0007] In a second aspect, an embodiment of the present application provides a system for testing the sealing performance of a flat gate valve under high pressure differential conditions, comprising: an acquisition unit, configured to acquire pressure differential information; wherein the pressure differential information includes a plurality of opening differential information, the opening differential information including the opening of the gate of the flat gate valve, a pressure differential corresponding to the opening, and a residence time of the gate at the opening, the pressure differential being the difference between the upstream pressure and the downstream pressure, the upstream pressure being the pressure at the input end of the flat gate valve, the downstream pressure being the pressure at the output end of the flat gate valve, and the opening being the vertical height of the gate from the valve seat sealing surface when the gate moves; an analysis unit, configured to obtain analysis information based on the pressure differential information; wherein the analysis information includes opening analysis information and life prediction information, wherein the opening analysis information reflects whether leakage may occur when the slab gate valve changes its opening within an opening stroke, wherein the opening stroke is the distance the gate plate moves when switching from a fully closed state to a fully open state; and the life prediction information includes a predicted number of opening and closing times of the slab gate valve and information reflecting whether the number of opening and closing times of the slab gate valve meets expectations; A summary unit is used to obtain a test report based on the analysis information; wherein the test report reflects the sealing performance of the flat gate valve.

[0008] In a third aspect, an embodiment of the present application provides a device for testing the sealing performance of a flat gate valve under high-pressure differential conditions, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements any one of the methods described in the first aspect above when executing the computer program.

[0009] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the method described in any one of the above-mentioned first aspects is implemented.

[0010] In the fifth aspect, an embodiment of the present application provides a computer program product. When the computer program product is run on a flat gate valve high pressure difference working condition sealing performance test device, the flat gate valve high pressure difference working condition sealing performance test device executes the flat gate valve high pressure difference working condition sealing performance test method described in any one of the above-mentioned first aspects.

[0011] It can be understood that the beneficial effects of the second to fifth aspects mentioned above can be found in the relevant description of the first aspect mentioned above, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0013] Figure 1 This is a flow chart of a method for testing the sealing performance of a flat gate valve under high-pressure differential conditions provided by one embodiment of the present application; Figure 2 This is a flow chart of step S200 in a method for testing the sealing performance of a flat gate valve under high pressure differential conditions provided by an embodiment of the present application; Figure 3 This is a flow chart of step S240 in the method for testing the sealing performance of a flat gate valve under high pressure differential conditions provided by one embodiment of the present application; Figure 4 This is a structural diagram of a flat gate valve high pressure differential operating condition sealing performance test system provided by one embodiment of the present application; Figure 5 It is a structural schematic diagram of a device for testing the sealing performance of a flat gate valve under high pressure difference conditions provided in one embodiment of the present application. DETAILED DESCRIPTION

[0014] In the following description, specific details such as specific system structures and techniques are provided for purposes of illustration rather than limitation to facilitate a thorough understanding of the embodiments of the present application. However, it will be apparent to those skilled in the art that the present application may be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to avoid obscuring the description of the present application with unnecessary detail.

[0015] It should be understood that when used in the present specification and the appended claims, the term "comprising" indicates the presence of described features, integers, steps, operations, elements and / or components, but does not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or collections thereof.

[0016] It will also be understood that the term "and / or" used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

[0017] As used in this specification and the appended claims, the term "if" can be interpreted as "when" or "upon" or "in response to determining" or "in response to detecting," depending on the context. Similarly, the phrase "if it is determined" or "if [described condition or event] is detected" can be interpreted as meaning "upon determination" or "in response to determining" or "upon detection of [described condition or event]" or "in response to detecting [described condition or event]," depending on the context.

[0018] In addition, in the description of the present application specification and the appended claims, the terms "first", "second", "third", etc. are only used to distinguish the descriptions and cannot be understood as indicating or implying relative importance.

[0019] References to "one embodiment" or "some embodiments" in this specification mean that a particular feature, structure, or characteristic described in conjunction with that embodiment is included in one or more embodiments of the present application. Thus, phrases such as "in one embodiment," "in some embodiments," "in other embodiments," and "in other embodiments" appearing in various places in this specification do not necessarily refer to the same embodiment, but rather mean "one or more but not all embodiments," unless otherwise specifically emphasized. The terms "including," "comprising," "having," and variations thereof all mean "including but not limited to," unless otherwise specifically emphasized.

[0020] The flat gate valve is a valve with a parallel gate as the opening and closing member. Its core function is to control the on-off of the medium through the linear motion of the gate. It is widely used in high-pressure, high-temperature and particle-containing medium pipelines in the petroleum, natural gas, chemical, electric power and other industries.

[0021] However, when the flat gate valve is operated under high pressure difference conditions and needs to be opened and closed frequently, the contact pressure of the sealing surface may be less than the fluid pressure difference on both sides of the gate during the opening or closing process, resulting in macro leakage (fluid force directly pushes the sealing surface open) or micro leakage (insufficient contact pressure on the sealing surface, unable to flatten the microscopic unevenness of the surface (such as rough peaks and valleys), resulting in leakage from tiny gaps). In addition, the high-speed jet generated by the medium passing through the gap of the sealing surface can easily cause cavitation wear, thereby affecting the sealing performance of the gate valve.

[0022] To address the aforementioned issues, embodiments of the present application provide a method for testing the sealing performance of a flat gate valve under high-pressure differential operating conditions. This method first obtains pressure differential information, including multiple opening differential information, covering all valve openings (opening travel) from "fully closed" to "fully open." The pressure differential and dwell time at different openings are then obtained, providing data support for analyzing the valve's sealing performance. Based on this pressure differential information, analysis information, including opening analysis information and life prediction information, is then obtained. This information is used to determine whether macroscopic or microscopic leakage may occur during the gate valve's opening or closing process due to the contact pressure on the sealing surface being less than the fluid pressure differential across the gate disc. The method also analyzes the impact of the actual load conditions under high-pressure differential operating conditions on the gate valve's lifespan, allowing for optimal maintenance scheduling and preventing leakage caused by excessive opening and closing cycles. A test report reflecting the flat gate valve's sealing performance is then generated based on this analysis information, visually displaying the valve's sealing performance and providing a basis for users to further analyze and assess the valve's sealing performance.

[0023] The high-pressure differential working condition sealing performance test method for flat gate valves provided in the embodiment of the present application can be applied to a high-pressure differential working condition sealing performance test device for flat gate valves. At this time, the high-pressure differential working condition sealing performance test device for flat gate valves is the executor of the high-pressure differential working condition sealing performance test method for flat gate valves provided in the embodiment of the present application. The embodiment of the present application does not impose any restrictions on the specific type of the high-pressure differential working condition sealing performance test device for flat gate valves.

[0024] For example, a device for testing the sealing performance of a flat gate valve under high-pressure differential operating conditions may include, but is not limited to, a control device and at least two pressure acquisition devices. The control device is in communication with each pressure acquisition device. The pressure acquisition device is capable of acquiring the pressure of the medium within the flat gate valve. The two pressure acquisition devices may be disposed on either side of the gate plate of the flat gate valve (one pressure acquisition device is disposed at the gate valve input end, and the other pressure acquisition device is disposed at the gate valve output end). For example, the pressure acquisition devices may be, but are not limited to, piezoresistive pressure sensors or strain gauge pressure sensors.

[0025] In order to better understand the method for testing the sealing performance of a flat gate valve under high-pressure differential conditions provided in the embodiment of the present application, the specific implementation process of the method for testing the sealing performance of a flat gate valve under high-pressure differential conditions provided in the embodiment of the present application is exemplarily introduced below.

[0026] Figure 1 A schematic flow chart of a method for testing the sealing performance of a flat gate valve under high-pressure differential working conditions provided by an embodiment of the present application is shown. The method for testing the sealing performance of a flat gate valve under high-pressure differential working conditions includes: S100, obtaining pressure differential information; wherein the pressure differential information includes multiple opening differential information, the opening differential information includes the opening of the gate of the flat gate valve, the pressure differential corresponding to the opening, and the residence time of the gate at the opening, the pressure differential is the difference between the upstream pressure and the downstream pressure, the upstream pressure is the pressure at the input end of the flat gate valve, the downstream pressure is the pressure at the output end of the flat gate valve, and the opening is the vertical height of the gate away from the valve seat sealing surface when the gate moves.

[0027] It is understood that differential pressure information can be obtained by receiving data transmitted by the user or by receiving real-time pressure data from pressure acquisition devices located on both sides of the gate disc of a flat gate valve (the input and output ends of the flat gate valve), but is not limited to these. The differential pressure information can be presented in the form of a two-dimensional line graph or a two-dimensional curve graph, but is not limited to these. The horizontal axis (X-axis) of the two-dimensional graph can represent the opening (the larger the opening, the farther from the origin / zero point of the X-axis) and the time corresponding to the opening, while the vertical axis (Y-axis) can represent the pressure (the larger the pressure, the farther from the origin / zero point of the Y-axis). The differential pressure information reflects the difference between the corresponding upstream pressure and the corresponding downstream pressure at a specific opening, as well as the dwell time at the current opening (the time difference between moving from the current opening to the next different opening). Obtaining differential pressure information can provide data support for analyzing the sealing performance of the gate valve.

[0028] In one possible implementation, in step S100, before obtaining the pressure difference information, the gate of the flat gate valve is in a fully closed state, and the difference between the upstream pressure and the downstream pressure is greater than 6 MPa. The pressure difference information is information obtained during the process of the gate switching from the fully closed state to the fully open state and then from the fully open state to the fully closed state.

[0029] It is understood that the difference between the upstream and downstream pressures can be greater than 6MPa, 10MPa, etc., but is not limited to these. Before obtaining differential pressure information, fully closing the gate of the slab gate valve and ensuring the difference between the upstream and downstream pressures is greater than 6MPa (or the designed pressure difference based on the gate valve's operating conditions) can provide a test environment for analyzing the sealing performance of the slab gate valve under high differential pressure conditions. The gate moves at a uniform speed during the two switching stages from fully closed to fully open and then back to fully closed. Confirming the data obtained during these two switching stages as differential pressure information can better reflect the actual operation of the gate valve under frequent opening and closing conditions, ensuring data reliability.

[0030] S200, obtaining analysis information based on the pressure difference information; wherein the analysis information includes opening analysis information and life prediction information, the opening analysis information reflects whether leakage may occur when the flat gate valve changes its opening within the opening stroke, the opening stroke is the movement distance when the gate plate switches from a fully closed state to a fully open state, and the life prediction information includes the predicted number of opening and closing times of the flat gate valve and information reflecting whether the number of opening and closing times of the flat gate valve meets expectations.

[0031] It is understood that the method for obtaining analysis information based on pressure differential information can be to send the pressure differential information to the user and then receive the data transmitted by the user, or to analyze each opening difference information in the pressure differential information separately to obtain the sealing surface reaction force of the gate valve at each opening, and to determine whether the sealing surface reaction force is greater than the pressure difference corresponding to the opening corresponding to the sealing surface reaction force, etc., but is not limited to this. The analysis information including opening analysis information and life prediction information obtained based on the pressure differential information can analyze whether the gate valve will cause macroscopic or microscopic leakage during the opening or closing process due to the sealing surface contact pressure being less than the fluid pressure difference on both sides of the gate plate, and analyze the impact of the actual load conditions of the gate valve under high pressure differential conditions on the gate valve life, so as to reasonably arrange maintenance time and avoid leakage of the gate valve due to the gate valve being opened and closed more times than expected.

[0032] In one possible implementation, see Figure 2 S200, obtaining analysis information based on the pressure difference information, including: S210, obtaining gate valve information; wherein the gate valve information includes coating thickness, gate width, sealing surface spacing, sealing surface area, material hardness, wear coefficient and gate friction coefficient; the coating thickness is the thickness of the gate coating, the gate friction coefficient is the friction coefficient between the gate and the sealing surface during the opening and closing process, the material hardness reflects the hardness of the gate, and the wear coefficient reflects the durability of the gate under medium erosion or opening and closing friction.

[0033] It can be understood that the sealing surface spacing is the distance between the sealing surfaces on the left and right sides of the gate. Gate valve information can be obtained by receiving data transmitted by the user or by searching a preset database using the specific model of the flat gate valve as an index to obtain information such as, but not limited to, the corresponding coating thickness, gate width, sealing surface spacing, sealing surface area, material hardness, wear coefficient, and gate friction coefficient. Obtaining gate valve information can provide a basis for analyzing the sealing performance of the gate valve under high-pressure differential conditions.

[0034] S220: Obtain opening analysis information based on the gate valve information and the pressure difference information.

[0035] It is understood that the method for obtaining the opening analysis information based on the gate valve information and the pressure differential information can be to send the gate valve information to the user and then receive the data transmitted by the user, or to analyze each opening differential information separately, multiply the pressure differential value, the opening, and the gate width to obtain a first value, then subtract the difference after the opening stroke from the opening and divide it by 2 to obtain a second value, multiply the first value and the second value to obtain the torque, subtract the torque from the quotient obtained by dividing the first value by 2 and divide it by the sealing surface spacing to obtain a judgment value, and analyze whether the judgment value is greater than the corresponding pressure differential value, etc., but is not limited to this. Obtaining the opening analysis information based on the gate valve information and the pressure differential information can analyze whether the gate valve will cause macroscopic leakage or microscopic leakage during the opening or closing process because the sealing surface contact pressure is less than the fluid pressure differential on both sides of the gate, providing a basis for analyzing the sealing performance of the gate valve.

[0036] In one possible implementation, see Figure 2 , S220, based on the gate valve information and the pressure difference information, obtain opening analysis information, including: S221, starting from the differential opening information corresponding to the opening whose value is smaller than any other opening, analyze each differential opening information separately, and confirm the value obtained by multiplying the opening in the differential opening information and the gate width as the effective gate area, and then multiply the effective gate area by the pressure difference corresponding to the opening to obtain the value confirmed as the fluid force.

[0037] It can be understood that starting from the opening differential information corresponding to the opening that is smaller than any other opening, that is, starting from the data obtained when the gate valve is at its minimum opening, the gate effective area and fluid force obtained by calculation can provide a basis for subsequent steps.

[0038] For example, assuming the opening is 0.15m, the gate width is 0.1m, and the pressure difference is 8MPa, the effective area of the gate = 0.15*0.1=0.015m², and the fluid force = 0.015*8000000=120000N=120kN.

[0039] S222 , after subtracting the opening from the opening stroke and dividing the result by 2 to obtain the offset of the application point, the value obtained by multiplying the offset of the application point by the fluid force is confirmed as the torque.

[0040] It can be understood that the offset of the point of action is the vertical distance from the center of the gate where the resultant fluid force acts. As the opening increases, the point of action of the fluid force moves upward from the bottom of the gate, gradually approaching the center of the gate. Calculating the offset of the point of action provides a basis for subsequent steps.

[0041] For example, assuming the opening stroke is 0.2 m, the opening is 0.15 m, and the fluid force is 120 kN, the action point offset = (0.2-0.15) / 2 = 0.025 m, and the torque = 0.025*120 = 3 kN.

[0042] S223, the value obtained by dividing the fluid force by 2 and then subtracting the torque divided by the sealing surface distance is confirmed as the sealing surface reaction force, and the value obtained by dividing the sealing surface reaction force by the sealing surface area is confirmed as the judgment value.

[0043] It can be understood that the judgment value obtained through calculation can provide a basis for subsequent steps.

[0044] For example, assuming the fluid force is 120 kN, the torque is 3 kN, the sealing surface spacing is 0.2 m, and the sealing surface area is 0.01 m², the sealing surface reaction force = (120 / 2) - (3 / 0.2) = 45 kN = 45,000 N, and the judgment value = 45,000 / 0.01 = 4,500,000 Pa = 4.5 MPa.

[0045] S224, analyzing the differential opening information corresponding to each opening in order from small to large according to the size of the opening; if the judgment value is greater than or equal to the pressure difference value in the differential opening information, analyzing the next differential opening information; if the judgment value is less than the pressure difference value in the differential opening information, confirming the opening in the differential opening information as the critical opening, and obtaining the opening analysis information reflecting that leakage may occur when the opening of the flat gate valve is within the critical opening range; wherein, the critical opening range is a numerical range of 5% above and below the critical opening.

[0046] It's understandable that the core of sealing performance in a flat gate valve lies in the sealing surface contact pressure (judgment value), which must be able to withstand the thrust of the pressure differential. When the sealing surface contact pressure is lower than the pressure differential, the fluid force overcomes the sealing surface resistance, forming a leakage path, leading to seal failure. If the judgment value is lower than the pressure differential value in the opening differential information, it indicates that the gate valve may leak at the current opening. By sequentially judging the pressure differential values in each opening differential information, it is possible to analyze whether leakage will occur during the gate movement. In the event of leakage during the gate movement, the user is reminded to avoid increasing the opening to the critical opening or to avoid staying within the critical opening range for too long.

[0047] For example, assuming that the critical opening is 5 cm, the critical opening range is (5*0.95, 5*1.05)=(4.75, 5.25).

[0048] S225, if after all the differential opening information analysis is completed, the judgment value corresponding to each differential opening information is greater than or equal to the pressure difference value in the corresponding differential opening information, then the opening analysis information reflecting that the flat gate valve will not leak when the opening is changed is obtained.

[0049] It can be understood that if the judgment values corresponding to the various opening difference information are greater than or equal to the pressure difference in the corresponding opening difference information, it means that any opening of the gate valve under the current working conditions will not cause leakage due to the pressure difference.

[0050] S230, obtain working condition information based on the pressure difference information; wherein the working condition information includes the maximum pressure difference and the low opening residence time, the maximum pressure difference is the pressure difference with the largest value among all the opening difference information, and the low opening residence time reflects the residence time of the gate within a certain opening range.

[0051] It is understood that the operating environment information can be obtained based on the pressure differential information by sending the pressure differential information to the user and then receiving the data transmitted by the user, or by determining the pressure differential value with the largest value among the various opening differential information as the maximum pressure differential, adding the dwell time in the opening differential information within a preset range to obtain the low opening dwell time, and then determining the maximum pressure differential and the low opening dwell time as the operating environment information, etc., but is not limited to this. Obtaining the operating environment information based on the pressure differential information can provide a basis for subsequent steps.

[0052] In one possible implementation, see Figure 2 S230: Obtaining operating environment information based on the pressure difference information, including: S231: Confirm the pressure difference value in each pressure difference information that is greater than any other pressure difference value as the maximum pressure difference.

[0053] It is understood that the method of determining whether the pressure difference value is the maximum value can be through manual traversal and comparison, or can be obtained by using the built-in Max function, etc., but is not limited thereto. Confirming the maximum pressure difference value as the maximum pressure difference can provide a basis for subsequent steps.

[0054] S232: Multiply the opening stroke by the preset minimum range value and the preset maximum range value to obtain the minimum value and the maximum value respectively, and determine the numerical range between the minimum value and the maximum value as the wear range.

[0055] It is understood that the preset minimum range value may be 0.05, 0.1, or a user-defined value, but is not limited thereto. The preset maximum range value may be 0.3, 0.35, or a user-defined value, but is not limited thereto. The calculated wear range can provide a basis for subsequent steps.

[0056] For example, assuming that the opening stroke is 0.2m, the preset minimum range value is 0.1, and the preset maximum range value may be 0.3, then the minimum value = 0.2*0.1 = 0.02m, the maximum value = 0.06m, and the wear range is (0.02, 0.06).

[0057] S233: The dwell time corresponding to the openings within the wear range is added to obtain the low opening dwell time.

[0058] It can be understood that the low opening residence time obtained by adding the residence time corresponding to the opening within the wear range can provide a basis for subsequent steps.

[0059] S234: The maximum pressure difference and the low opening residence time are confirmed as operating condition information.

[0060] It can be understood that confirming the maximum pressure difference and the low opening residence time as the operating environment information can provide a basis for subsequent steps.

[0061] S240: Obtain life prediction information based on the gate valve information and the working environment information.

[0062] It is understood that the life prediction information can be obtained based on the gate valve information and the operating environment information by sending the gate valve information and the operating environment information to a user and then receiving data transmitted by the user, or by first obtaining the wear amount per opening and closing based on the gate valve information and the operating environment information, then dividing the coating thickness by the wear amount per opening and closing to obtain the value as the predicted number of openings and closings, and determining whether the predicted number of openings and closings is less than a preset number of openings and closings, etc., but is not limited thereto. Obtaining the life prediction information based on the gate valve information and the operating environment information can predict the impact of cavitation wear caused by high pressure differential and frequent opening and closing on the sealing performance of the gate valve.

[0063] In one possible implementation, see Figure 3 , S240, obtain life prediction information based on gate valve information and working environment information, including: S241, obtaining a single opening and closing wear amount based on the gate valve information and the working environment information; wherein, the single opening and closing wear amount reflects the wear amount of the gate plate after the gate plate is switched from a fully closed state to a fully open state and then switched to a fully closed state.

[0064] It is understood that the method for obtaining the wear amount per opening and closing based on the gate valve information and the operating environment information may be to send the gate valve information and the operating environment information to the user and then receive the data transmitted by the user, or to obtain the wear amount per opening and closing based on the gate valve friction coefficient, the maximum pressure difference, the gate effective area, the wear coefficient, the opening stroke, 2, the resultant amount, divided by the material hardness, and then multiplied by the low opening compensation coefficient, etc., but is not limited to these. Obtaining the wear amount per opening and closing based on the gate valve information and the operating environment information can provide a basis for predicting the number of gate openings and closings.

[0065] In one possible implementation, see Figure 3 , S241, obtains the single opening and closing wear amount based on the gate valve information and the working environment information, including: S2411, the value obtained by multiplying the gate friction coefficient by the maximum pressure difference and then by the gate effective area is confirmed as the normal contact force.

[0066] It can be understood that the normal contact force is the pressure between the gate and the valve seat sealing surface perpendicular to the contact surface. The value obtained by multiplying the gate friction coefficient by the maximum pressure difference and then by the gate effective area is confirmed as the normal contact force to provide a basis for subsequent steps.

[0067] For example, assuming that the gate friction coefficient is 0.15, the maximum pressure difference is 42 MPa, and the gate effective area is 6283 mm², the normal contact force = 0.15*42*6283≈39583N.

[0068] S2412, multiply the opening stroke by 2 to obtain the gate displacement distance.

[0069] It can be understood that multiplying the opening stroke by 2 to obtain the gate displacement distance can provide a basis for subsequent steps.

[0070] For example, assuming the opening stroke is 0.2 m, the gate displacement distance = 0.2*2 = 0.4 m.

[0071] S2413: Obtain a low opening compensation coefficient based on the operating environment information.

[0072] It is understood that the low-opening compensation coefficient can be obtained based on the operating environment information by, for example, sending the operating environment information to the user and then receiving data transmitted by the user, or by dividing the low-opening residence time by the sum of the residence times in all the differential opening information and then adding 1 to determine the value as the low-opening compensation coefficient, but is not limited thereto. Determining the low-opening compensation coefficient based on the operating environment information can compensate for the additional wear incurred by the gate valve at low opening, thereby ensuring data reliability.

[0073] In one possible implementation, see Figure 3 , S2413, obtains the low opening compensation coefficient based on the working condition environment information, including: S24131, add up the dwell time in each difference information to obtain the total dwell time.

[0074] It can be understood that adding the dwell time in each difference information to obtain the total dwell time can provide a basis for subsequent steps.

[0075] For example, assuming that the dwell times in each piece of differential information are 1 s, 2 s, and 3 s respectively, the total dwell time=1+2+3=6 s.

[0076] S24132: The value obtained by dividing the low opening residence time by the total residence time is confirmed as the compensation value.

[0077] It can be understood that confirming the value obtained by dividing the low-opening residence time by the total residence time as the compensation value can provide a basis for subsequent steps.

[0078] For example, assuming that the low opening degree dwell time is 8 seconds and the total dwell time is 50 seconds, the compensation value=8 / 50=0.16.

[0079] S24133: The value obtained by adding 1 to the compensation value is confirmed as the low opening compensation coefficient.

[0080] It can be understood that confirming the value obtained by adding 1 to the compensation value as the low-opening compensation coefficient can provide a basis for subsequent steps.

[0081] For example, assuming the compensation value is 0.16, the low opening compensation coefficient=1+0.16=1.16.

[0082] S2414: The wear coefficient is multiplied by the normal contact force and then by the gate displacement distance. The value is divided by the material hardness and then multiplied by the low opening compensation coefficient to obtain the single opening and closing wear amount.

[0083] It can be understood that the calculated wear amount for a single opening and closing can provide a basis for subsequent steps.

[0084] For example, assuming that the wear coefficient is 0.0000005, the normal contact force is 39583N, the gate displacement distance is 0.4m=400mm, the low opening compensation coefficient is 1.5, and the material hardness is 1800HV, the wear amount for a single opening and closing = 0.0000005*[(39583*400) / 1800]*1.5≈0.006.

[0085] S242, the value obtained by dividing the coating thickness by the wear amount of a single opening and closing is confirmed as the predicted number of opening and closing times.

[0086] It can be understood that the value obtained by dividing the coating thickness by the wear amount of a single opening and closing is confirmed as the predicted number of opening and closing times, which can provide a basis for subsequent steps.

[0087] For example, assuming that the coating thickness is 3 mm and the wear amount of a single opening and closing is 0.0119, the predicted number of opening and closing times = 3 / 0.006 = 500.

[0088] S243, determine whether the predicted opening and closing times are greater than or equal to the preset opening and closing times. If the predicted opening and closing times are greater than or equal to the preset opening and closing times, obtain life prediction information reflecting that the opening and closing life of the flat gate valve meets expectations; if the predicted opening and closing times are less than the preset opening and closing times, confirm the predicted opening and closing times and the warning information reflecting that the opening and closing times of the flat gate valve do not meet expectations as life prediction information.

[0089] It is understood that the preset opening and closing times may be 1000, 1500, or a user-defined value, but is not limited thereto. If the predicted opening and closing times are greater than or equal to the preset opening and closing times, it indicates that the service life of the gate valve meets expectations. If the predicted opening and closing times are less than the preset opening and closing times, it indicates that the service life of the gate valve does not meet expectations, reminding the user to pay attention to the opening and closing times of the gate valve and to repair or replace the gate valve before the opening and closing times reach the predicted opening and closing times.

[0090] S250: The opening analysis information and the life prediction information are confirmed as analysis information.

[0091] It can be understood that confirming the opening analysis information and the life prediction information as analysis information can provide a basis for subsequent steps.

[0092] S300, obtaining a test report based on the analysis information; wherein the test report reflects the sealing performance of the flat gate valve.

[0093] It can be understood that the method of obtaining a test report based on the analysis information can be to send the analysis information to the user and then receive the data transmitted by the user, or to determine whether the analysis information includes information reflecting that the predicted opening and closing times of the gate valve do not meet expectations or that leakage may occur when the gate valve changes its opening within the opening stroke, etc., but is not limited to this.

[0094] In one possible implementation, see Figure 3 , S300, obtain a test report based on the analysis information, including: S310, if the analysis information indicates that the flat gate valve may leak when the opening is changed, a test report indicating that the flat gate valve may leak when operating under a high pressure difference condition is obtained.

[0095] It can be understood that if the analysis information shows that the flat gate valve may leak when changing the opening, then a test report reflecting that the flat gate valve may leak when working under high pressure difference conditions can be obtained, which can provide a basis for users to further analyze the sealing performance of the gate valve or improve the design of the gate valve.

[0096] S320, if the analysis information shows that the flat gate valve does not leak when the opening is changed, and the life prediction information shows that the number of opening and closing times of the flat gate valve is in line with expectations, then a test report is obtained showing that the sealing performance of the flat gate valve is in line with expectations when operating under high pressure difference conditions.

[0097] It can be understood that if the analysis information shows that the flat gate valve will not leak when the opening is changed, and the life prediction information shows that the number of opening and closing times of the flat gate valve is in line with expectations, it means that the gate valve meets the user's expectations and the sealing performance is qualified.

[0098] S330, if the analysis information indicates that the flat gate valve does not leak when the opening is changed, and the life prediction information indicates that the number of openings and closings of the flat gate valve does not meet expectations, then a test report is obtained indicating that the flat gate valve has good sealing performance when operating under high pressure difference conditions and the number of openings and closings is less than the predicted number of openings and closings.

[0099] It can be understood that if the analysis information shows that the flat gate valve will not leak when the opening is changed, and the life prediction information shows that the opening and closing times of the flat gate valve are not as expected, it means that the sealing performance is good before the opening and closing times of the gate valve reach the predicted opening and closing times. After the opening and closing times of the gate valve reach the predicted opening and closing times, leakage may occur due to wear.

[0100] It should be understood that the size of the serial numbers of the steps in the above embodiments does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0101] Corresponding to the flat gate valve high pressure difference working condition sealing performance test method described in the above embodiment, the embodiment of the present application also provides a flat gate valve high pressure difference working condition sealing performance test system, and each unit of the system can implement each step of the flat gate valve high pressure difference working condition sealing performance test method. Figure 4 A structural block diagram of a flat gate valve high-pressure differential working condition sealing performance test system provided in an embodiment of the present application is shown. For ease of explanation, only the parts related to the embodiment of the present application are shown.

[0102] Reference Figure 4 , the system comprises: An acquisition unit is used to acquire pressure differential information; wherein the pressure differential information includes multiple opening differential information, the opening differential information includes the opening of the gate of the flat gate valve, the pressure differential corresponding to the opening, and the residence time of the gate at the opening. The pressure differential is the difference between the upstream pressure and the downstream pressure. The upstream pressure is the pressure at the input end of the flat gate valve, the downstream pressure is the pressure at the output end of the flat gate valve, and the opening is the vertical height of the gate away from the valve seat sealing surface when the gate moves.

[0103] An analysis unit is used to obtain analysis information based on the pressure difference information; wherein the analysis information includes opening analysis information and life prediction information, the opening analysis information reflects whether leakage may occur when the flat gate valve changes its opening within the opening stroke, the opening stroke is the movement distance when the gate plate switches from a fully closed state to a fully open state, and the life prediction information includes the predicted number of opening and closing times of the flat gate valve and information reflecting whether the number of opening and closing times of the flat gate valve meets expectations.

[0104] The summary unit is used to obtain a test report based on the analysis information; wherein the test report reflects the sealing performance of the flat gate valve.

[0105] It should be noted that the information interaction, execution process, etc. between the above-mentioned units are based on the same concept as the method embodiment of this application. Their specific functions and technical effects can be found in the method embodiment part and will not be repeated here.

[0106] Those skilled in the art can clearly understand that, for the convenience and brevity of description, only the division of the above-mentioned functional units and modules is used as an example for illustration. In actual applications, the above-mentioned functions can be distributed and completed by different functional units and modules as needed, that is, the internal structure of the system can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiment can be integrated into one processing unit, or each unit can exist physically alone, or two or more units can be integrated into one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of software functional units. In addition, the specific names of the functional units and modules are only for the convenience of distinguishing each other, and are not used to limit the scope of protection of this application. The specific working process of the units and modules in the above-mentioned system can refer to the corresponding process in the aforementioned method embodiment, and will not be repeated here.

[0107] The present application also provides a device for testing the sealing performance of a flat gate valve under high pressure differential conditions. Figure 5 This is a schematic diagram of the structure of a flat gate valve high pressure difference working condition sealing performance test device provided in one embodiment of the present application. Figure 5 As shown, the flat gate valve high pressure difference working condition sealing performance test device of this embodiment includes a control device 6. The control device 6 includes: at least one processor 60 ( Figure 5 Only one is shown), at least one memory 61 ( Figure 5Only one is shown in the figure) and a computer program 62 stored in the at least one memory 61 and executable on the at least one processor 60. When the processor 60 executes the computer program 62, the flat gate valve high pressure differential working condition sealing performance test device implements the steps of any of the above-mentioned flat gate valve high pressure differential working condition sealing performance test method embodiments, or the flat gate valve high pressure differential working condition sealing performance test device implements the functions of each unit in the above-mentioned system embodiments.

[0108] For example, the computer program 62 may be divided into one or more modules / units, which are stored in the memory 61 and executed by the processor 60 to implement the present application. The one or more modules / units may be a series of computer program instruction segments capable of implementing specific functions, and the instruction segments are used to describe the execution process of the computer program 62 in the control device 6.

[0109] The control device 6 can be a computing device such as a desktop computer, a notebook, a PDA, or a cloud server. The control device 6 can include, but is not limited to, a processor 60 and a memory 61. It will be understood by those skilled in the art that Figure 5 The present invention is merely an example of a device for testing the sealing performance of a flat gate valve under high-pressure differential conditions, and does not constitute a limitation on the device for testing the sealing performance of a flat gate valve under high-pressure differential conditions. The device may include more or fewer components than shown in the figure, or a combination of certain components, or different components, and may also include input and output devices, network access devices, buses, etc.

[0110] The processor 60 may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor.

[0111] In some embodiments, the memory 61 may be an internal storage unit of the control device 6, such as a hard drive or memory of the control device 6. In other embodiments, the memory 61 may also be an external storage device of the control device 6, such as a plug-in hard drive, a Smart Media Card (SMC), a Secure Digital (SD) card, a Flash memory card, etc. equipped on the control device 6. Furthermore, the memory 61 may include both an internal storage unit of the control device 6 and an external storage device. The memory 61 is used to store an operating system, application programs, a boot loader, data, and other programs, such as the program code of the computer program. The memory 61 may also be used to temporarily store data that has been output or is about to be output.

[0112] An embodiment of the present application further provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps in any of the above method embodiments are implemented.

[0113] An embodiment of the present application provides a computer program product. When the computer program product is run on a flat gate valve high pressure difference working condition sealing performance test device, the flat gate valve high pressure difference working condition sealing performance test device implements the steps of any of the above-mentioned method embodiments.

[0114] If the integrated unit is implemented as a software functional unit and sold or used as a standalone product, it can be stored in a computer-readable storage medium. Based on this understanding, the present application implements all or part of the process steps in the above-mentioned method embodiments by instructing the relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium. When executed by a processor, the computer program can implement the steps of each of the above-mentioned method embodiments. The computer program includes computer program code, which can be in source code form, object code form, executable file, or some intermediate form. The computer-readable medium can include at least: any entity or device capable of carrying the computer program code to a flat gate valve high-pressure differential sealing performance test device, a recording medium, computer memory, read-only memory (ROM), random access memory (RAM), an electrical carrier signal, a telecommunications signal, and a software distribution medium. Examples include a USB flash drive, a removable hard drive, a magnetic disk, or an optical disk. In some jurisdictions, based on legislation and patent practice, computer-readable media cannot be electrical carrier signals or telecommunications signals.

[0115] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant description of other embodiments.

[0116] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0117] In the embodiments provided in the present application, it should be understood that the disclosed flat gate valve high pressure difference working condition sealing performance test system, equipment and method can be implemented in other ways. For example, the flat gate valve high pressure difference working condition sealing performance test system and equipment embodiments described above are merely schematic. For example, the division of the modules or units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.

[0118] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0119] The above-described embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present application, and should all be included in the scope of protection of the present application.

Claims

1. A method for testing the sealing performance of a flat gate valve under high pressure differential conditions, characterized in that: include: Obtaining differential pressure information; wherein the differential pressure information includes multiple differential opening information, the differential opening information including the opening of the gate of the flat gate valve, the pressure differential corresponding to the opening, and the residence time of the gate at the opening, the pressure differential being the difference between the upstream pressure and the downstream pressure, the upstream pressure being the pressure at the input end of the flat gate valve, the downstream pressure being the pressure at the output end of the flat gate valve, and the opening being the vertical height of the gate from the valve seat sealing surface when the gate moves; Obtaining analysis information based on the pressure differential information; wherein the analysis information includes opening analysis information and life prediction information, wherein the opening analysis information reflects whether leakage may occur when the slab gate valve changes its opening within an opening stroke, wherein the opening stroke is the distance the gate plate moves when switching from a fully closed state to a fully open state; and the life prediction information includes a predicted number of opening and closing times of the slab gate valve and information reflecting whether the number of opening and closing times of the slab gate valve meets expectations; A test report is obtained based on the analysis information; wherein the test report reflects the sealing performance of the flat gate valve.

2. The method for testing the sealing performance of a flat gate valve under high pressure differential conditions according to claim 1, characterized in that: Before obtaining the pressure difference information, the gate of the flat gate valve is in a fully closed state, and the difference between the upstream pressure and the downstream pressure is greater than 6MPa. The pressure difference information is information obtained during the process of the gate switching from the fully closed state to the fully open state and then from the fully open state to the fully closed state.

3. The method for testing the sealing performance of a flat gate valve under high pressure differential conditions according to claim 1, wherein: The obtaining of the opening analysis information and the life prediction information based on the pressure difference information includes: Obtain gate valve information; wherein the gate valve information includes coating thickness, gate width, sealing surface spacing, sealing surface area, material hardness, wear coefficient, and gate friction coefficient; the coating thickness is the thickness of the gate coating, the gate friction coefficient is the friction coefficient between the gate and the sealing surface during opening and closing, the material hardness reflects the hardness of the gate, and the wear coefficient reflects the durability of the gate under medium erosion or opening and closing friction; Obtaining the opening analysis information based on the gate valve information and the pressure difference information; Obtaining operating environment information based on the pressure differential information; wherein the operating environment information includes a maximum pressure differential and a low opening residence time, wherein the maximum pressure differential is the pressure differential value with the largest value among the various opening differential information, and the low opening residence time reflects the residence time of the gate within a certain opening range; Obtaining the life prediction information based on the gate valve information and the working environment information; The opening analysis information and the life prediction information are confirmed as the analysis information.

4. The method for testing the sealing performance of a flat gate valve under high pressure differential conditions according to claim 3, characterized in that: The obtaining of the opening analysis information based on the gate valve information and the pressure difference information includes: Starting from the opening differential information corresponding to the opening whose value is smaller than any other opening, each of the opening differential information is analyzed respectively, and the value obtained by multiplying the opening in the opening differential information by the gate width is confirmed as the gate effective area, and then the value obtained by multiplying the gate effective area by the pressure difference corresponding to the opening is confirmed as the fluid force; The value obtained by subtracting the opening from the opening stroke is divided by 2 to obtain the offset of the application point, and the value obtained by multiplying the offset of the application point by the fluid force is determined as the torque; The value obtained by dividing the fluid force by 2 and then subtracting the torque divided by the sealing surface distance is confirmed as the sealing surface reaction force, and the value obtained by dividing the sealing surface reaction force by the sealing surface area is confirmed as the judgment value; Analyzing the differential opening information corresponding to each of the openings in ascending order according to the size of the opening; if the judgment value is greater than or equal to the pressure difference value in the differential opening information, analyzing the next differential opening information; if the judgment value is less than the pressure difference value in the differential opening information, confirming the opening in the differential opening information as a critical opening, and obtaining the opening analysis information reflecting that leakage may occur when the opening of the flat gate valve is within the critical opening range; wherein the critical opening range is a numerical range of 5% above and below the critical opening; If after all the opening difference information analysis is completed, the judgment value corresponding to each opening difference information is greater than or equal to the pressure difference value in the corresponding opening difference information, then the opening analysis information reflecting that the flat gate valve will not leak when the opening is changed is obtained.

5. The method for testing the sealing performance of a flat gate valve under high pressure differential conditions according to claim 3, wherein: The obtaining of the operating environment information based on the pressure difference information includes: Confirming the pressure difference value in each of the differential information that is greater than any other pressure difference value as the maximum pressure difference; Multiplying the opening stroke by a preset minimum range value and a preset maximum range value respectively to obtain a minimum value and a maximum value, and determining the numerical range between the minimum value and the maximum value as the wear range; The low opening residence time is obtained by adding the residence times corresponding to the openings within the wear range; The maximum pressure difference and the low opening residence time are confirmed as the operating condition environment information.

6. The method for testing the sealing performance of a flat gate valve under high pressure differential conditions according to claim 4, characterized in that: The obtaining of the life prediction information based on the gate valve information and the operating environment information includes: A single opening and closing wear amount is obtained based on the gate valve information and the working environment information; wherein the single opening and closing wear amount reflects the wear amount of the gate plate after the gate plate is switched from a fully closed state to a fully open state and then switched to a fully closed state; The value obtained by dividing the coating thickness by the wear amount of a single opening and closing operation is confirmed as the predicted number of opening and closing operations; Determine whether the predicted opening and closing times is greater than or equal to the preset opening and closing times. If the predicted opening and closing times is greater than or equal to the preset opening and closing times, obtain the life prediction information reflecting that the opening and closing life of the flat gate valve meets expectations; if the predicted opening and closing times is less than the preset opening and closing times, confirm the predicted opening and closing times and the warning information reflecting that the opening and closing times of the flat gate valve do not meet expectations as the life prediction information.

7. The method for testing the sealing performance of a flat gate valve under high pressure differential conditions according to claim 6, characterized in that: The obtaining of the single opening and closing wear amount based on the gate valve information and the working environment information includes: The value obtained by multiplying the gate friction coefficient by the maximum pressure difference and then by the gate effective area is confirmed as the normal contact force; Multiply the opening stroke by 2 to obtain the gate displacement distance; Obtaining a low opening compensation coefficient based on the operating environment information; The wear amount of a single opening and closing is obtained by multiplying the wear coefficient by the normal contact force and then by the gate displacement distance, dividing the value by the material hardness and then multiplying by the low opening compensation coefficient.

8. The method for testing the sealing performance of a flat gate valve under high pressure differential conditions according to claim 7, characterized in that: The obtaining of the low opening compensation coefficient based on the operating environment information includes: Adding the dwell time in each of the difference information to obtain a total dwell time; The value obtained by dividing the low opening residence time by the total residence time is confirmed as the compensation value; A value obtained by adding 1 to the compensation value is confirmed as the low-opening compensation coefficient.

9. The method for testing the sealing performance of a flat gate valve under high pressure differential conditions according to claim 1, wherein: The obtaining of a test report based on the analysis information includes: If the analysis information indicates that the flat gate valve may leak when the opening is changed, then the test report indicating that the flat gate valve may leak when operating under high pressure difference conditions is obtained; If the analysis information indicates that the flat gate valve does not leak when the opening is changed, and the life prediction information indicates that the number of openings and closings of the flat gate valve is as expected, then the test report indicating that the sealing performance of the flat gate valve is as expected when operating under high pressure difference conditions is obtained; If the analysis information shows that the flat gate valve will not leak when the opening is changed, and the life prediction information shows that the number of opening and closing times of the flat gate valve does not meet expectations, then the test report is obtained that shows that the flat gate valve has good sealing performance when operating under high pressure difference conditions and the number of opening and closing times is less than the predicted number of opening and closing times.

10. A device for testing the sealing performance of a flat gate valve under high-pressure differential working conditions, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the method according to any one of claims 1 to 9 is implemented.

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