Withstand voltage test device and withstand voltage test method

Abstract

The invention relates to a pressure-resistant test device and a pressure-resistant test method, an operator can send an instruction to a liquid injection operation system through a control system in a safety control room far away from a test area to realize accurate application, maintenance and release of pressure, and due to the fact that pressurization operation is completely carried out at a far end, the pressure-resistant test device is very convenient to operate. Even if the nonmetal composite material box body accidentally cracks or leaks in an overpressure state, an operator cannot be exposed in a dangerous area of high-pressure jet fluid or splashing fragments, and the pressure monitoring system automatically and continuously monitors the pressure in the nonmetal composite material box body. The behavior that a person needs to get close to and read a pressure gauge with naked eyes in a traditional method is replaced, the stress and strain of the non-metal composite material box body can be monitored, the stress and strain parameters can be more sensitively and more quantitatively captured, and the deformation and internal stress distribution of the non-metal composite material box body under the pressure can be accurately detected. The deformation is far earlier than obvious deformation which can be identified by naked eyes, and an early-stage and more accurate early warning signal is provided.

Description

Technical Field

[0001] The present application relates to the field of pressure resistance testing of non-metallic composite material boxes, and in particular to a pressure resistance testing device and a pressure resistance testing method. Background Art

[0002] The non-metallic composite material box is a multifunctional integrated device made mainly of non-metallic composite materials. It is composed of two or more material components with different physical and chemical properties (such as polymer resin matrix and fiber reinforcement material). It has the characteristics of structural designability and coordinated performance optimization.

[0003] Traditional pressure testing typically involves inspectors closely examining the pressure vessel's surface and pressure gauge readings to determine if the vessel is leaking or deforming. This requires personnel to closely contact the vessel during overpressure, creating unavoidable safety risks. Summary of the Invention

[0004] The present application provides a pressure test device and a pressure test method, which can solve the technical problem that in the traditional test process, personnel need to come into close contact with the pressure vessel, which inevitably poses safety risks.

[0005] In a first aspect, an embodiment of the present application provides a pressure test device, comprising: A liquid storage tank, the liquid storage tank being connected to a liquid injection operating system via a first pipe, the liquid injection operating system being connected to a non-metallic composite material box via a second pipe, the liquid injection operating system being used to control the output pressure and flow of the liquid storage tank; A pressure monitoring system, which is installed on a non-metallic composite material box to monitor the stress, strain and pressure of the non-metallic composite material box; A control system is connected to the liquid injection operating system and the pressure monitoring system.

[0006] In combination with the first aspect, in one embodiment, the pressure test device further includes: A test protection room, wherein the test protection room is provided with a protection door, a floor rail is laid in the test protection room, the floor rail extends outside the test protection room, a walking platform is installed on the floor rail, the walking platform is used to install a non-metallic composite material box, and the walking platform is connected to the control system; A monitoring system is connected to the control system and is arranged in the test protection room, and is used to implement all-round real-time monitoring of the test protection room.

[0007] In conjunction with the first aspect, in one embodiment, the monitoring system includes: A camera, wherein the camera is connected to a switch via a network video recorder, and the switch is connected to the control system; A display is connected to the network hard disk video recorder.

[0008] In conjunction with the first aspect, in one embodiment, the liquid injection operation system includes: a pump body, wherein an input end of the pump body is connected to the first pipe, and an output end of the pump body is connected to the second pipe; A pressure gauge is installed on the second pipe and is used to monitor the injection pressure in real time; An electric regulating valve, installed on the second pipeline, for regulating the output pressure of the pump body; The pump body, the pressure gauge and the electric regulating valve are connected to the control system.

[0009] In conjunction with the first aspect, in one embodiment, the pressure monitoring system includes: A strain gauge, a displacement sensor, and a load sensor, wherein the strain gauge, the displacement sensor, and the load sensor are used to be installed on a non-metallic composite material box; A strain gauge is connected to the strain gauge, the displacement sensor and the load sensor, and the strain gauge is connected to the control system.

[0010] In conjunction with the first aspect, in one embodiment, the control system includes: a host computer, the host computer being connected to a programmable logic controller, which is connected to the liquid injection operating system and the pressure monitoring system, and configured to generate a liquid injection operation instruction set according to a preset logic, transmit the instruction set to the liquid injection operating system via the programmable logic controller, receive a multi-source data stream from the programmable logic controller, the multi-source data stream including execution feedback parameters of the liquid injection operating system and real-time pressure measurement values ​​of the pressure monitoring system, and trigger an interrupt control instruction of the programmable logic controller based on a dynamic comparison result of the real-time pressure measurement value with a preset threshold value; A database module, connected to the host computer, for storing and calling real-time data and historical data during the test; A human-machine interface module is connected to the host computer and is used to receive external input parameter configuration instructions and manual intervention instructions, and forward them to the host computer, and dynamically present the operating status of the liquid injection operating system, the real-time pressure curve of the pressure monitoring system and system alarm events, respond to external query requests, and call and display historical operation records stored in the database module.

[0011] In combination with the first aspect, in one embodiment, the liquid storage tank is equipped with a liquid level meter, water inlet and outlet valves, and a sewage valve.

[0012] In a second aspect, embodiments of the present application provide a pressure test method for a pressure test device as described in some of the above embodiments, which comprises the following steps: The output pressure α and flow rate β of the liquid injection operating system are set. The output pressure α of the liquid injection operating system is increased successively within unit time t, while the flow rate β remains unchanged. If the stress, strain and pressure displayed by the pressure monitoring system are stable under each output pressure α of the liquid injection operating system, it indicates that the sealing performance of the non-metallic composite material box is good.

[0013] In conjunction with the second aspect, in one embodiment, the method further includes the following steps: If the output pressure α of the liquid injection operating system or the stress, strain and pressure displayed in the pressure monitoring system are abnormal during the test, stop the test. After the pressure displayed in the pressure monitoring system returns to atmospheric pressure, open the protective door and enter the test protection room for observation, or retrieve the entire test process video of the monitoring system on the control system for frame-by-frame analysis.

[0014] In conjunction with the second aspect, in one embodiment, before setting the output pressure α and flow rate β of the liquid injection operating system, the output pressure α of the liquid injection operating system is increased sequentially within a unit time t, and the flow rate β remains unchanged. If the stress, strain, and pressure displayed by the pressure monitoring system are stable under each output pressure α of the liquid injection operating system, it indicates that the sealing performance of the non-metallic composite material box is good, the following steps are also included: Use the walking platform to go outside the test protection room, hoist the non-metallic composite material box onto the walking platform, fix it on the walking platform with homemade tooling, then drive the walking platform into the test protection room and close the protection door.

[0015] The beneficial effects of the technical solutions provided in the embodiments of the present application include: Operators can send instructions to the liquid injection operating system through the control system in a safe control room far away from the test area to achieve precise application, maintenance and release of pressure. Since the pressurization operation is performed entirely at the remote end, even if the non-metallic composite box accidentally ruptures or leaks under overpressure, the operator will not be exposed to the dangerous area of ​​high-pressure jet fluid or flying debris. The pressure monitoring system is directly installed on the non-metallic composite box to automatically and continuously monitor the pressure inside the non-metallic composite box. It replaces the traditional method in which personnel need to get close to and read the pressure gauge with the naked eye. It can also monitor the stress and strain of the non-metallic composite box. The stress and strain parameters can more sensitively and quantitatively capture the subtle deformation and internal stress distribution of the non-metallic composite box under pressure, long before obvious deformation that can be identified by the naked eye appears, providing an earlier and more accurate structural integrity early warning signal. Personnel can obtain all test status information without getting close to the high-pressure vessel. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] 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 description of the embodiments. 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.

[0017] Figure 1 It is a structural diagram of the pressure test device; Figure 2 It is a structural diagram of the monitoring system; Figure 3 It is a structural diagram of the pressure monitoring system; Figure 4 This is the structural block diagram of the control system.

[0018] In the figure: 1. Liquid storage tank; 2. Test protection room; 3. Liquid injection operation system; 4. Pressure monitoring system; 5. Control system; 6. Walking platform; 7. Protection door; 8. Floor rail; 9. Camera; 10. Network video recorder; 11. Switch; 12. Host computer; 13. Display; 14. Strain gauge; 15. Displacement sensor; 16. Load sensor; 17. Strain gauge; 18. Non-metallic composite material box. DETAILED DESCRIPTION

[0019] In order to enable those skilled in the art to better understand the present invention, 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 creative work are within the scope of protection of this application.

[0020] It should be understood that the non-metallic composite material box is a multifunctional integrated device made mainly of non-metallic composite materials. It is composed of two or more material components with different physical and chemical properties (such as polymer resin matrix and fiber reinforcement material). It has the characteristics of structural designability and coordinated performance optimization.

[0021] Traditional pressure testing typically involves inspectors closely examining the pressure vessel surface and pressure gauge readings to determine if the vessel is leaking or deforming. Consequently, when the pressure vessel is overpressurized, personnel must come into close contact with the vessel, creating unavoidable safety risks.

[0022] The embodiment of the present application provides a pressure test device that can solve the technical problem that during the traditional test process, personnel need to come into close contact with the pressure vessel, which inevitably poses safety risks.

[0023] First, as Figure 1 As shown, an embodiment of the present application provides a pressure test device, which includes: a liquid storage tank 1, the liquid storage tank 1 is connected to a liquid injection operating system 3 through a pipeline 1, the liquid injection operating system 3 is used to communicate with a non-metallic composite material box 18 through a pipeline 2, and the liquid injection operating system 3 is used to control the output pressure and flow of the liquid storage tank 1; a pressure monitoring system 4, the pressure monitoring system 4 is used to be installed on the non-metallic composite material box 18, and is used to monitor the stress, strain and pressure of the non-metallic composite material box 18; a control system 5, the control system 5 is connected to the liquid injection operating system 3 and the pressure monitoring system 4.

[0024] In this embodiment, in the traditional method, personnel need to manually operate valves, pumps and other equipment to pressurize, and observe the pressure gauge closely. The liquid injection operating system 3 of the device obtains the medium from the liquid storage tank 1 through pipe 1, and then connects to the non-metallic composite material box 18 to be tested through pipe 2. The liquid injection operating system 3 actively controls the pressure and flow output to the non-metallic composite material box 18, which means that the pressurization process no longer requires personnel to manually adjust valves or start and stop pumps next to the equipment. The operator can send instructions to the liquid injection operating system 3 through the control system 5 in a safety control room far away from the test area to achieve precise application, maintenance and release of pressure. Since the pressurization operation is performed completely at the remote end, even if the non-metallic composite material box 18 accidentally ruptures or leaks under overpressure, the operator will not be exposed to high-pressure injection. In hazardous areas of fluid or flying debris, the pressure monitoring system 4 is directly installed on the non-metallic composite box 18 to automatically and continuously monitor the pressure inside the non-metallic composite box 18. It replaces the traditional method in which personnel need to get close to and read the pressure gauge with the naked eye. It can also monitor the stress and strain of the non-metallic composite box 18. The stress and strain parameters can more sensitively and quantitatively capture the tiny deformation and internal stress distribution of the non-metallic composite box 18 under pressure, long before obvious deformation that can be identified by the naked eye appears, providing an earlier and more accurate structural integrity early warning signal. All key data (pressure, stress, strain) monitored are transmitted to the remote control system 5 in real time via signal lines (wired or wireless), and personnel can obtain all test status information without getting close to the high-pressure container.

[0025] The control system 5 is the brains of the entire device. It is bidirectionally connected to the liquid injection operation system 3 and the pressure monitoring system 4. From the control room, the operator remotely sets parameters such as the test pressure target, pressurization rate, and pressure holding time, and starts / stops the test through the control system 5 interface. These commands are sent to the liquid injection operation system 3 for execution. The control system 5 receives and displays all data (pressure, stress, and strain) from the pressure monitoring system 4 in real time. It makes real-time judgments based on preset safety thresholds (such as maximum allowable pressure and maximum allowable strain). If the control system 5 detects data anomalies (such as an abnormal pressure rise exceeding the safety limit, a sharp increase in strain indicating a potential failure, or a sudden drop in pressure indicating a leak), it immediately and automatically issues a command to the liquid injection operation system 3 to stop pressurization, initiate pressure relief, or take other safety measures. This automated, rapid response capability far exceeds manual response time, enabling immediate intervention and ensuring maximum safety. The control system 5 records test data throughout the entire process, facilitating subsequent analysis of chamber performance and test results, eliminating the need for personnel to risk on-site recording.

[0026] In combination with the first aspect, in one embodiment, Figure 1As shown, the pressure test device also includes: a test protection room 2, the test protection room 2 is provided with a protection door 7, a floor rail 8 is laid in the test protection room 2, the floor rail 8 extends to the outside of the test protection room 2, and the floor rail 8 is installed with a walking platform 6, the walking platform 6 is used to install a non-metallic composite material box 18, and the walking platform 6 is connected to the control system 5; a monitoring system, the monitoring system is connected to the control system 5, and the monitoring system is arranged in the test protection room 2, which is used to implement all-round real-time monitoring of the test protection room 2.

[0027] In this embodiment, a special test protection room 2 is set up. The walls must have impact resistance and explosion-proof capabilities (such as concrete or composite armor structure). The protection door 7 adopts a locking design and automatically locks during the test to prevent people from entering by mistake. A ground rail 8 is laid inside, and the rail extends to the outside of the room to achieve contactless transportation inside and outside the box. When the non-metallic composite material box 18 fails extremely (such as bursting) during the overpressure test, the test protection room 2 acts as a physical barrier to completely block high-speed flying fragments and high-pressure fluid impact, completely eliminating the risk of casualties. The locking mechanism of the protection door 7 is linked with the control system 5 to ensure that people cannot enter the dangerous area during the test, eliminating the risk of intrusion caused by human operational errors. The non-metallic composite material box 18 is fixed on the walking platform 6, which moves along the ground rail 8. The walking platform 6 is remotely driven by the control system 5 (such as electric / hydraulic) to achieve fully automatic entry and exit from the protection room. Traditional tests require manual transportation or hoisting of the non-metallic composite material box 18 to the test position, which poses a risk of bumping or falling. Through tracked automatic transportation, no manual intervention is required in the movement of the non-metallic composite material box 18, eliminating safety hazards during the transportation process.

[0028] The test process is as follows: installation of the non-metallic composite material box 18 → automatic movement into the test protection room 2 → closing the protection door 7 → testing → pressure relief → opening the protection door 7 → automatic movement out of the test protection room 2. The entire process is automated and closed-loop, eliminating the possibility of personnel approaching the non-metallic composite material box 18 under high pressure.

[0029] In combination with the first aspect, in one embodiment, Figure 2 As shown, the monitoring system includes: a camera 9 , which is connected to a switch 11 via a network hard disk recorder 10 , and the switch 11 is connected to the control system 5 ; and a display 13 , which is connected to the network hard disk recorder 10 .

[0030] In this embodiment, the camera 9 is deployed at key locations inside the test protection room 2 (such as distributed on the four sides of the non-metallic composite material box 18), supporting high-definition / infrared / wide-angle to replace manual visual inspection, and realizing the capture of surface conditions (leakage, bulge, crack) without blind spots; the network hard disk recorder 10 compresses and stores the video stream in real time, completely traces the test process, and synchronizes the picture with the pressure data, providing a hardware foundation for AI leakage identification. The switch 11 establishes a high-speed data channel between the monitoring system and the control system 5 to realize millisecond-level synchronous transmission of the monitoring picture and the pressure / strain data, supporting the intelligent decision-making of the control system 5. The display 13 independently displays the monitoring picture (which can be split into multiple screens) to provide the operator with an exclusive visual monitoring interface. The control system 5 receives the video stream and integrates it into the human-machine interface module, and calls the real-time / playback picture with one click. The video abnormality triggers automatic pump stop / pressure relief (such as a jet leak visible to the naked eye).

[0031] Among them, the camera 9 can provide high-definition observation at a safety distance of 10-100 times (such as capturing 0.1mm cracks through a telephoto lens); the display 13 projects the image to the control room in real time, and personnel can complete the inspection without entering the test protection room 2. The network hard disk recorder 10 records continuously at ≥25 frames / second, supports frame-by-frame playback to locate the starting point of the fault, and can be equipped with an optional AI algorithm to automatically mark abnormal areas (such as liquid splashing and local expansion of the box through image recognition). The operator synchronously observes the real-time curve (internal pressure) of the pressure monitoring system 4 and the apparent image (external state) of the camera 9 on the display 13. When there is no abnormality in the pressure but the image shows leakage, the test can be terminated in advance to avoid cumulative damage leading to explosion.

[0032] In combination with the first aspect, in one embodiment, the liquid injection operating system 3 includes: a pump body, the input end of the pump body is connected to pipeline one, and its output end is connected to pipeline two; a pressure gauge, the pressure gauge is installed on pipeline two, which is used to monitor the injection pressure in real time; an electric regulating valve, the electric regulating valve is installed on pipeline two, which is used to adjust the output pressure of the pump body; the pump body, the pressure gauge and the electric regulating valve are connected to the control system 5.

[0033] In this embodiment, the pump body pressurizes the medium in the liquid storage tank 1 and pumps it into the pipeline 2 to provide a pressure source. The pressure gauge monitors the pressure value at the output end of the pipeline 2 in real time. The electric regulating valve receives instructions from the control system 5 and dynamically adjusts the valve opening to control the output pressure. The control system 5 receives the pressure gauge data and controls the start and stop of the pump body and the opening of the electric regulating valve in real time.

[0034] In combination with the first aspect, in one embodiment, Figure 3As shown, the pressure monitoring system 4 includes: a strain gauge 14, a displacement sensor 15 and a load sensor 16, which are used to be installed on a non-metallic composite material box 18; a strain gauge 17, which is connected to the strain gauge 14, the displacement sensor 15 and the load sensor 16, and is connected to the control system 5.

[0035] In this embodiment, a strain gauge 14 is used to monitor the microstrain on the surface of the non-metallic composite material box 18, a displacement sensor 15 captures the macro deformation, and a load sensor 16 measures the internal pressure distribution, forming a full-scale monitoring capability from micro to macro. The strain gauge 17 converts the mechanical deformation into a quantifiable electrical signal through a bridge circuit to achieve accurate collection of strain data.

[0036] In combination with the first aspect, in one embodiment, Figure 4 As shown, the control system 5 includes: a host computer 12, which is connected to a programmable logic controller, which is connected to the liquid injection operation system 3 and the pressure monitoring system 4. The programmable logic controller is used to generate a liquid injection operation instruction set according to a preset logic, and transmit it to the liquid injection operation system 3 through the programmable logic controller, and receive multi-source data streams from the programmable logic controller. The multi-source data streams include execution feedback parameters of the liquid injection operation system 3 and real-time pressure measurement values ​​of the pressure monitoring system 4, and trigger interrupt control instructions of the programmable logic controller based on the dynamic comparison results of the real-time pressure measurement values ​​with preset thresholds; a database module, which is connected to the host computer 12 and is used to store and call real-time data and historical data during the test process; a human-machine interface module, which is connected to the host computer 12 and is used to receive external input parameter configuration instructions and manual intervention instructions, and forward them to the host computer 12, and dynamically present the operating status of the liquid injection operation system 3, the real-time pressure curve of the pressure monitoring system 4 and system alarm events. In response to external query requests, the module calls and displays historical operation records stored in the database module.

[0037] In combination with the first aspect, in one embodiment, the liquid storage tank 1 is equipped with a liquid level meter, water inlet and outlet valves, and a sewage valve.

[0038] In this embodiment, a magnetostrictive liquid level gauge is vertically installed on the top of the liquid storage tank 1. The liquid level height is fed back in real time through float displacement measurement, with a measurement error of less than ±1mm, and it has a high and low liquid level alarm function. The liquid level data is transmitted to the control system 5 through a 4-20mA signal to achieve linkage control with the liquid injection operation system 3; the inlet and outlet valves use electric actuators, which receive PWM signals from the control system 5 to adjust the opening, and the flow regulation accuracy reaches ±2%. The drain valve is equipped with an anti-clogging design, and the valve core adopts a V-shaped opening structure, which cooperates with the compressed air backblowing function to prevent particulate matter from depositing.

[0039] Among them, dual liquid level gauge installation ports are set on the side wall of the liquid storage tank 1. When the main liquid level gauge fails, it can automatically switch to the backup one. The inlet and outlet valves and the sewage valve use independent power supply circuits. In an emergency, hard line cutting can be achieved through the control system 5.

[0040] In a second aspect, embodiments of the present application provide a pressure test method for a pressure test device as described in some of the above embodiments, comprising the following steps: S1: Set the output pressure α and flow rate β of the liquid injection operating system 3, and increase the output pressure α of the liquid injection operating system 3 in unit time t, while keeping the flow rate β unchanged. If the stress, strain and pressure displayed by the pressure monitoring system 4 are stable under each output pressure α of the liquid injection operating system 3, it indicates that the non-metallic composite material box 18 has good sealing performance.

[0041] In this embodiment, a loading method of equal flow β and variable output pressure α is adopted, the pressure step increment Δα is ≤ 10% of the rated pressure, and the holding time of each pressure platform is t ≥ 60s to ensure sufficient stress relaxation of the material. The pressure monitoring system 4 synchronously collects the surface strain, stress and internal pressure of the non-metallic composite material box 18. If the stress, strain and pressure displayed by the pressure monitoring system 4 are stable under each output pressure α of the liquid injection operating system 3, it indicates that the non-metallic composite material box 18 has good sealing performance; if a sudden drop in pressure or a sudden change in local strain and stress occurs, the PLC is immediately triggered to interrupt the liquid injection and the sound and light alarm device is started.

[0042] In conjunction with the second aspect, in one embodiment, in S1, the following steps are included: S1-1: If the output pressure α of the liquid injection operating system 3 or the stress, strain and pressure displayed in the pressure monitoring system 4 are abnormal during the test, the test is stopped. After the pressure displayed in the pressure monitoring system 4 returns to atmospheric pressure, the protective door 7 is opened to enter the test protection room 2 for observation, or the entire test process video of the monitoring system is retrieved on the control system 5 for frame-by-frame analysis.

[0043] In this embodiment, if the output pressure α of the liquid injection operating system 3 or the stress, strain and pressure displayed in the pressure monitoring system 4 are abnormal during the test, it is necessary to wait for the pressure displayed in the pressure monitoring system 4 to return to atmospheric pressure before entering the test protection room 2 for observation to ensure the personal safety of the staff, or to retrieve the entire test process video of the monitoring system on the control system 5 in advance for frame-by-frame analysis.

[0044] In conjunction with the second aspect, in one embodiment, before S1, the following steps are included: S0: Use the walking platform 6 to go outside the test protection room 2, hoist the non-metallic composite material box 18 onto the walking platform 6, fix it on the walking platform 6 with a homemade tooling, then drive the walking platform 6 into the test protection room 2 and close the protection door 7.

[0045] In this embodiment, the walking platform 6 has improved efficiency compared with traditional manual handling, the self-made tooling supports rapid changeover, and is adapted to the fixing requirements of non-metallic composite material boxes 18 of different specifications. The protective door 7 and the walking platform 6 are position interlocked, and the door is only allowed to be closed when the platform reaches the specified coordinates, thereby realizing unmanned operation of the entire test process.

[0046] In conjunction with the second aspect, in one embodiment, in S0, the following steps are included: S0-1: When the non-metal composite material box 18 is not installed, turn on the power, start the switch, and observe that all systems are normal before use.

[0047] In conjunction with the second aspect, in one embodiment, after S1, the following steps are included: S2: After the test, turn off the main switch, drive the walking platform 6 to the outside of the test protection room 2, remove the non-metallic composite material box 18, and then drive the walking platform 6 into the test protection room 2. Make sure all parts are dust-proof, rust-proof, and preserved, close the protective door 7, and the entire measurement is completed.

[0048] In the description of this application, it should be noted that the terms "upper" and "lower" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0049] It should be noted that, in this application, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element.

[0050] The foregoing is merely a list of specific embodiments of the present application, intended to enable those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the broadest scope consistent with the principles and novel features of the present application.

Claims

1. A pressure test device, characterized in that: It includes: A liquid storage tank (1), the liquid storage tank (1) being connected to a liquid injection operating system (3) via a first pipe, the liquid injection operating system (3) being connected to a non-metallic composite material box (18) via a second pipe, the liquid injection operating system (3) being used to control the output pressure and flow of the liquid storage tank (1); A pressure monitoring system (4), the pressure monitoring system (4) is used to be installed on a non-metallic composite material box (18), and is used to monitor the stress, strain and pressure of the non-metallic composite material box (18); A control system (5), wherein the control system (5) is connected to the liquid injection operating system (3) and the pressure monitoring system (4).

2. The pressure test device according to claim 1, characterized in that: The pressure test device also includes: A test protection room (2), the test protection room (2) is provided with a protection door (7), a floor rail (8) is laid in the test protection room (2), the floor rail (8) extends to the outside of the test protection room (2), a walking platform (6) is installed on the floor rail (8), the walking platform (6) is used to install a non-metallic composite material box (18), and the walking platform (6) is connected to the control system (5); A monitoring system is connected to the control system (5), and the monitoring system is arranged in the test protection room (2) and is used to implement all-round real-time monitoring of the test protection room (2).

3. The pressure test device according to claim 2, characterized in that: The monitoring system includes: A camera (9), wherein the camera (9) is connected to a switch (11) via a network hard disk recorder (10), and the switch (11) is connected to the control system (5); A display (13), wherein the display (13) is connected to the network hard disk video recorder (10).

4. The pressure test device according to claim 1, characterized in that: The liquid injection operating system (3) comprises: a pump body, wherein the input end of the pump body is connected to the first pipe, and the output end of the pump body is connected to the second pipe; A pressure gauge is installed on the second pipe and is used to monitor the injection pressure in real time; An electric regulating valve, installed on the second pipeline, for regulating the output pressure of the pump body; The pump body, the pressure gauge and the electric regulating valve are connected to the control system (5).

5. The pressure test device according to claim 1, characterized in that: The pressure monitoring system (4) comprises: A strain gauge (14), a displacement sensor (15), and a load sensor (16), wherein the strain gauge (14), the displacement sensor (15), and the load sensor (16) are used to be installed on a non-metallic composite material box (18); A strain gauge (17), the strain gauge (17) is connected to the strain gauge (14), the displacement sensor (15) and the load sensor (16), and the strain gauge (17) is connected to the control system (5).

6. The pressure test device according to claim 1, characterized in that: The control system (5) comprises: A host computer (12), the host computer (12) is connected to a programmable logic controller, the programmable logic controller is connected to the liquid injection operating system (3) and the pressure monitoring system (4), and is used to generate a liquid injection operation instruction set according to a preset logic, and transmit the instruction set to the liquid injection operating system (3) through the programmable logic controller, and receive a multi-source data stream from the programmable logic controller, the multi-source data stream including an execution feedback parameter of the liquid injection operating system (3) and a real-time pressure measurement value of the pressure monitoring system (4), and trigger an interrupt control instruction of the programmable logic controller based on a dynamic comparison result of the real-time pressure measurement value and a preset threshold value; A database module, the database module is connected to the host computer (12), and is used to store and call real-time data and historical data during the test process; A human-machine interface module is connected to the host computer (12), and is used to receive externally input parameter configuration instructions and manual intervention instructions, and forward them to the host computer (12), and dynamically present the operating status of the injection operating system (3), the real-time pressure curve of the pressure monitoring system (4) and system alarm events, respond to external query requests, and call and display historical operation records stored in the database module.

7. The pressure test device according to claim 1, characterized in that: The liquid storage tank (1) is equipped with a liquid level gauge, water inlet and outlet valves, and a sewage valve.

8. A pressure test method for a pressure test device according to any one of claims 1 to 7, characterized in that: It includes the following steps: The output pressure α and flow rate β of the liquid injection operating system (3) are set, and the output pressure α of the liquid injection operating system (3) is increased in sequence within a unit time t, while the flow rate β remains unchanged. If the stress, strain, and pressure displayed by the pressure monitoring system (4) are stable under each output pressure α of the liquid injection operating system (3), it indicates that the sealing performance of the non-metallic composite material box (18) is good.

9. The pressure test method of the pressure test device according to claim 8, characterized in that: The following steps are also included: If the output pressure α of the injection operating system (3) or the stress, strain and pressure displayed in the pressure monitoring system (4) are abnormal during the test, the test is stopped. After the pressure displayed in the pressure monitoring system (4) returns to atmospheric pressure, the protective door (7) is opened to enter the test protection room (2) for observation, or the whole test process video of the monitoring system is retrieved on the control system (5) for frame-by-frame analysis.

10. The pressure test method of the pressure test device according to claim 8, characterized in that: Before setting the output pressure α and flow rate β of the liquid injection operating system (3), the output pressure α of the liquid injection operating system (3) is increased in sequence within a unit time t, and the flow rate β remains unchanged. If the stress, strain and pressure displayed by the pressure monitoring system (4) are stable under each output pressure α of the liquid injection operating system (3), it indicates that the sealing performance of the non-metallic composite material box (18) is good, the following steps are also included: Use the walking platform (6) to go outside the test protection room (2), hoist the non-metallic composite material box (18) onto the walking platform (6), fix it on the walking platform (6) with a self-made tool, then drive the walking platform (6) into the test protection room (2), and close the protection door (7).

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