Inflation test system and equipment for air tightness inspection of diaphragm storage tank

Abstract

The invention discloses an inflation test system and equipment for air tightness inspection of a diaphragm storage tank, and relates to the technical field of spaceflight, the inflation test system for air tightness inspection of the diaphragm storage tank comprises an air inlet, a filling port and an inflation port, the air inlet is communicated with a process gas cylinder through a first pipeline and is communicated with the filling port through a second pipeline, and the inflation port is communicated with the process gas cylinder through a third pipeline; the first pipeline and the second pipeline are respectively provided with a throttling electromagnetic valve, and the inflation inlet is communicated with the process gas cylinder through a third pipeline; the pressure difference transmitter is connected between the filling port and the inflating port; according to the technical scheme, during use, pressure gas is filled into the liquid cavity of the storage tank through the filling port, the pressure of the gas cavity of the storage tank is kept consistent with the pressure of the liquid cavity through the inflation port, the pressure of the gas cavity of the storage tank is kept consistent with the pressure of the liquid cavity through the inflation port, and the pressure of the gas cavity of the storage tank is kept consistent with the pressure of the liquid cavity through the inflation port. Therefore, the diaphragm between the air cavity and the liquid cavity is prevented from turning over, and the smoothness of an airtight test on the diaphragm storage tank is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of aerospace, in particular to a kind of diaphragm tank airtight inspection with inflation test system and equipment. BACKGROUND

[0002] Diaphragm tank is mainly applied to the attitude control propulsion system of spacecraft, undertakes the important task of long-term storage propellant.When the propulsion system works, diaphragm is turned over under the action of upstream gas pressure, provides propellant without bubble for engine.Such design effectively guarantees the storage and supply of propellant, ensures the stable operation of spacecraft propulsion system.

[0003] Generally, the gas cavity of attitude control propulsion system only has one inlet, which is connected to the gas cavity inlet of each tank through a ring pipe;Fuel filling port has two, which are oxidant filling port and fuel filling port.Because the diaphragm in the attitude control propulsion tank is a disposable product, when carrying out airtight test during the assembly of attitude control power system, it must be ensured that the pressure of tank gas cavity and liquid cavity is consistent, to prevent diaphragm from turning over, so as to ensure the safety of attitude control power system and improve the reliability of rocket launch.

[0004] The equipment currently being manufactured is mostly airtight test equipment for single tank, not suitable for airtight test equipment for attitude control power system.And these devices use the method of observing the pressure difference between gas cavity and liquid cavity by visual observation, and rely on manual adjustment of the inflation speed of tank gas cavity and liquid cavity to realize the pressure balance of two cavities.This operation method requires high artificial eyesight and tests artificial speed, and slight carelessness can easily cause accidents. SUMMARY

[0005] Therefore, the present application provides a kind of diaphragm tank airtight inspection with inflation test system and equipment to solve how to carry out airtight test of diaphragm tank.

[0006] The diaphragm tank airtight inspection with inflation test system provided by the present application comprises: Gas inlet, filling port and inflation port, the gas inlet is communicated with process gas cylinder through first pipeline, and is communicated with the filling port through second pipeline, the first pipeline and the second pipeline are respectively provided with throttling electromagnetic valve, and the inflation port is communicated with the process gas cylinder through third pipeline; Pressure difference transmitter is connected between the filling port and the inflation port; Controller, which is connected with the pressure difference transmitter through electrical signal, and is connected with the throttling electromagnetic valve on the first pipeline and the second pipeline.

[0007] The technical scheme provided by the application, when in use, fills the pressure gas through the filling port towards the liquid cavity of the storage tank, keeps the pressure of the gas cavity of the storage tank consistent with the pressure of the liquid cavity through the inflation port, thereby ensuring that the diaphragm between the gas cavity and the liquid cavity does not turn over, and ensuring the smoothness of the air-tight test on the diaphragm storage tank.

[0008] Specifically, the gas of the gas inlet is received through the first pipeline and the second pipeline simultaneously, the first pipeline injects the gas into the process gas cylinder, and the second pipeline injects the gas into the liquid cavity of the storage tank, the process gas cylinder is communicated with the gas cavity of the storage tank, the pressure injected into the process gas cylinder is kept consistent with the pressure injected into the liquid cavity of the storage tank, thereby ensuring the consistency of the pressure of the gas cavity and the liquid cavity in the storage tank, and further ensuring that the diaphragm in the storage tank does not turn over.

[0009] Optionally, the process gas cylinder has at least two groups, and the total volume of the at least two groups is consistent with the volume of the oxidant cavity or the fuel cavity of the storage tank. In this way, the control accuracy of the valves on the first pipeline and the second pipeline can be reduced, and the control of keeping the pressure between the inflation port and the filling port consistent can be facilitated.

[0010] Optionally, there are at least two filling ports. Since the storage tanks are in pairs, the oxidant cavities and the fuel cavities are both two, respectively, and the two oxidant cavities or the two fuel cavities can be inflated simultaneously through the two filling ports. In addition, since the gas cavities of the two storage tanks are in a communicated state, only one inflation port is needed.

[0011] Optionally, a filter is arranged in front of each filling port.

[0012] Optionally, it further comprises an exhaust port communicated with the first pipeline and the second pipeline in front of the throttling electromagnetic valves, respectively, and an exhaust valve is arranged on the exhaust pipe. The exhaust pipe can be used to exhaust the gas after the test is completed.

[0013] Optionally, the gas inlet is provided with a gas inlet stop valve.

[0014] Optionally, a pressure gauge is arranged on the third pipeline.

[0015] The application further provides a gas inflation test equipment for air-tight inspection of a diaphragm storage tank, comprising: an equipment mounting frame, the equipment mounting frame is provided with the gas inflation test system for air-tight inspection of a diaphragm storage tank in any one of the above-mentioned schemes, the equipment mounting frame has an operation panel, a first side plate and a second side plate, the operation panel is provided with a valve control element, the first side plate is provided with a gas inlet, and the second side plate is provided with an inflation port and a filling port. Through the arrangement of the equipment mounting frame, the system is integrated, and the operation and use are facilitated.

[0016] Optionally, the bottom of the equipment mounting frame is provided with a moving device. Through the arrangement of the moving device, the movement of the equipment is facilitated.

[0017] Optionally, the equipment mounting frame has at least two groups of the diaphragm tank airtightness inspection inflation test systems. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the drawings needed in the following specific embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0019] Figure 1 A system principle diagram of a diaphragm tank airtightness inspection inflation test system provided for an embodiment of the present application; Figure 2 A perspective view of a diaphragm tank airtightness inspection inflation test equipment provided for an embodiment of the present application; Figure 3 A second angle schematic view of Figure 2 A second angle schematic view of

[0020] Explanation of reference signs: 1, inlet stop valve; 11, first inlet stop valve control; 13, second inlet stop valve control; 2, throttling electromagnetic valve; 21, first throttling electromagnetic valve; 22, second throttling electromagnetic valve; 23, third throttling electromagnetic valve; 24, fourth throttling electromagnetic valve; 3, process gas cylinder; 31, first group of process gas cylinders; 33, second group of process gas cylinders; 4, filter; 41, first group of filters; 43, second group of filters; 5, differential pressure transmitter; 51, first differential pressure transmitter; 53, second differential pressure transmitter; 6, digital display instrument; 61, first digital display instrument; 63, second digital display instrument; 7, discharge valve; 71, first discharge valve; 73, second discharge valve; 8, equipment mounting frame; 81, operation panel; 82, first side plate; 83, bottom plate; 84, caster; 85, frame; 86, second side plate; 9, controller; 10, pressure gauge; 101, first pressure gauge; 102, second pressure gauge; a1, inlet; a11, first inlet; a13, second inlet; a2, air inlet; a21, first air inlet; a23, second air inlet; a3, filling port; a31, first filling port; a33, second filling port; a4, air outlet. DETAILED DESCRIPTION

[0021] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0022] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0023] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0024] In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0025] Embodiment 1 As Figure 1As shown, the inflation test system for air tightness check of the diaphragm storage tank provided by the embodiment includes: an air inlet a1, a filling port a3 and an inflation port a2, the air inlet a1 is connected with a process gas cylinder 3 through a first pipeline, and is connected with the filling port a3 through a second pipeline, the first pipeline and the second pipeline are respectively provided with a throttling electromagnetic valve 2, and the inflation port a2 is connected with the process gas cylinder 3 through a third pipeline. In this way, the gas of the air inlet a1 is led to the process gas cylinder 3 through the first pipeline to inflate the process gas cylinder 3. The gas of the air inlet a1 is also led to the filling port a3 through the second pipeline to inflate the liquid cavity of the storage tank through the filling port a3. The inflation port a2 is used to communicate with the gas cavity of the storage tank, so that the air pressure in the gas cavity can be kept consistent with the air pressure in the process gas cylinder 3. It should be noted that the volume of the gas cavity of the storage tank is generally zero before the flight test, and the inside has a diaphragm, so it cannot be inflated towards the gas cavity to prevent the diaphragm from turning over and damaging the storage tank. The gas filled through the first pipeline is stored in the process gas cylinder 3.

[0026] As shown in Figure 1 It also includes a differential pressure transmitter 5 connected between the filling port a3 and the inflation port a2, which is used to detect the pressure difference between the filling port a3 and the inflation port a2 in real time, so as to ensure that the pressures of the gas cavity and the liquid cavity of the storage tank are consistent. In some embodiments, the differential pressure transmitter 5 has a digital display instrument 6, so that the pressure difference data can be observed intuitively.

[0027] As shown in Figure 1 It also includes a controller 9 connected with the differential pressure transmitter 5 through an electrical signal, and the controller 9 is electrically connected with the throttling electromagnetic valves 2 on the first pipeline and the second pipeline. Therefore, the controller 9 can control the opening degrees of the two throttling electromagnetic valves 2 in real time according to the signal of the differential pressure transmitter 5.

[0028] The technical scheme provided by the embodiment, when in use, inflates the liquid cavity of the storage tank through the filling port a3, and keeps the pressure of the gas cavity of the storage tank consistent with the pressure of the liquid cavity through the inflation port a2, so as to ensure that the diaphragm between the gas cavity and the liquid cavity does not turn over, and ensure the smoothness of the air tightness test of the diaphragm storage tank.

[0029] Specifically, the gas of the air inlet a1 is received through the first pipeline and the second pipeline at the same time, the first pipeline injects the gas into the process gas cylinder 3, and the second pipeline injects the gas into the liquid cavity of the storage tank, the process gas cylinder 3 is connected with the gas cavity of the storage tank, and the pressure injected into the process gas cylinder 3 is kept consistent with the pressure injected into the liquid cavity of the storage tank, so as to ensure the consistency of the pressures of the gas cavity and the liquid cavity in the storage tank, and further ensure that the diaphragm in the storage tank does not turn over.

[0030] As Figure 1 shown in the embodiment, the process gas cylinders 3 are provided in groups, and the total volume of the process gas cylinders 3 in each group is consistent with the volume of the oxidant chamber or fuel chamber of the tank. In this way, when the liquid chamber (i.e. the oxidant chamber or fuel chamber) of the tank is filled with gas, the process gas cylinders 3 of the same volume are also filled with gas at the same time. Through the above-mentioned arrangement of the volume of the process gas cylinders 3, the control accuracy of the valves on the first pipeline and the second pipeline can be reduced, and the pressure consistency between the filling port a2 and the filling port a3 can be easily maintained.

[0031] Of course, the above description is not limiting, and in some alternative embodiments, the process gas cylinders 3 in each group can also have only one cylinder, and the volume of the cylinder is consistent with the volume of the oxidant chamber or fuel chamber of the tank.

[0032] As Figure 1 shown in the embodiment, in some embodiments, there are at least two filling ports a3. Since the tanks are generally provided in pairs, the oxidant chambers and the fuel chambers each have two, and the two filling ports a3 can be used to fill the two oxidant chambers or fuel chambers at the same time. In addition, since the gas chambers of the two tanks are in communication, only one filling port a2 is needed.

[0033] Of course, the above description is not limiting, and the number of the filling ports a3 and the filling ports a2 can be determined according to the number of the actual system to be measured, and is not specifically limited here.

[0034] As Figure 1 shown in the embodiment, in some embodiments, a filter 4 is provided in front of each filling port a3. Through the arrangement of the filter 4, impurities in the gas source are filtered, and downstream components are protected.

[0035] As Figure 1 shown in the embodiment, in some embodiments, it further includes an exhaust port a4, which is in communication with the front of the throttling electromagnetic valve 2 of the first pipeline and the second pipeline through an exhaust pipe, and a discharge valve 7 is arranged on the exhaust pipe. The arrangement of the exhaust pipe can be used to exhaust the gas after the test is completed. The communication in front of the throttling electromagnetic valve 2 of the first pipeline and the second pipeline is to exhaust the gas in the tank after the air tightness test of the tank is completed, and also to control the exhaust rate.

[0036] As Figure 1 shown in the embodiment, in some embodiments, the gas inlet a1 is provided with a gas inlet stop valve 1. The arrangement of the gas inlet stop valve 1 is used to control the timing of gas inlet, and to avoid gas leakage from the gas inlet a1 during gas exhaust.

[0037] As Figure 1As shown, in some embodiments, a pressure gauge 10 is installed on the third pipeline. The pressure gauge 10 is used to display the gas pressure value in the storage tank for easy observation.

[0038] In other embodiments, a pressure reducing valve, an intake filter 4, an intake pressure gauge 10, and a front exhaust shut-off valve can be installed before the intake port a1. The intake pressure gauge 10 is used to detect the intake air source pressure, and the pressure reducing valve is used to reduce the air source pressure that is higher than the usage requirements to the working pressure.

[0039] How to use: During the filling operation, the inlet shut-off valve 1 is opened, allowing gas to enter through the inlet a1. The gas passes through the throttling solenoid valves 2 on the first and second pipes. The first pipe fills the process gas cylinder 3 with gas, while the second pipe injects the gas into the liquid chamber (oxidizer chamber or fuel chamber) of the storage tank through the filling port a3. Simultaneously, the gas in the process gas cylinder 3 flows through the third pipe to the filling port a2, connecting with the gas chamber of the storage tank.

[0040] The differential pressure transmitter 5 monitors the pressure difference between the filling port a3 and the air filling port a2 in real time, and the digital display instrument 6 displays the pressure difference data intuitively. The controller 9 controls the opening of the two throttling solenoid valves 2 in real time according to the signal from the differential pressure transmitter 5 to ensure that the pressure in the air chamber and liquid chamber of the storage tank is consistent and to prevent the diaphragm from flipping.

[0041] If the tanks are installed in pairs, the two oxidizer chambers or fuel chambers can be filled with gas simultaneously through at least two filling ports a3. Since the gas chambers of the two tanks are connected, only one filling port a2 is needed to maintain the pressure balance of the gas chambers.

[0042] During the test, the gas pressure value in the storage tank is displayed by pressure gauge 10, which makes it convenient for operators to observe the pressure situation and ensure that the test is carried out within the specified pressure range.

[0043] Continuously observe the differential pressure data fed back by the differential pressure transmitter 5 and the pressure value displayed by the pressure gauge 10 to ensure that the pressure in the gas chamber and liquid chamber of the storage tank is stable and consistent throughout the entire test process, so as to ensure that the diaphragm does not flip and thus the airtightness test can be carried out smoothly.

[0044] After the test, open the exhaust valve 7 and discharge the gas in the storage tank through the exhaust pipe connected to the exhaust port a4. Since the exhaust pipe is connected before the throttling solenoid valves 2 of the first and second pipelines, the exhaust rate can be controlled by these two throttling solenoid valves 2.

[0045] Working principle: Gas distribution principle: Gas introduced through inlet a1 is supplied to process gas cylinder 3 via the first pipe for filling and storage, while simultaneously supplied to the liquid chamber of the storage tank via the second pipe to the filling port a3. The filling port a2 connects to the gas chamber of the storage tank and is linked to process gas cylinder 3, ensuring that the gas pressure in the gas chamber is consistent with the gas pressure in process gas cylinder 3.

[0046] Pressure balance principle: The differential pressure transmitter 5 is connected between the filling port a3 and the charging port a2 to detect the pressure difference between them in real time. The controller 9 is connected to the differential pressure transmitter 5 via an electrical signal and is also electrically connected to the throttling solenoid valve 2 on the first and second pipelines. Based on the signal fed back by the differential pressure transmitter 5, the controller controls the opening of the throttling solenoid valve 2 in real time to adjust the gas flow rate entering the process gas cylinder 3 and the liquid chamber of the storage tank, thereby ensuring that the pressure in the gas chamber and liquid chamber of the storage tank is consistent, preventing the diaphragm between the gas chamber and liquid chamber from flipping, and ensuring that the airtightness test can be carried out smoothly.

[0047] The principle of volume matching for process gas cylinders 3: The total volume of a group of process gas cylinders 3 (or the volume of a single process gas cylinder 3) is consistent with the volume of the oxidant chamber or fuel chamber of the storage tank. When filling the liquid chamber of the storage tank, gas is simultaneously filled into process gas cylinders 3 of the same volume. This volume setting reduces the control precision requirements of the valves on the first and second pipelines, and facilitates maintaining consistent pressure between the filling port a2 and the filling port a3.

[0048] Exhaust control principle: Exhaust port a4 is connected to the first and second pipelines via an exhaust pipe, respectively, before the throttling solenoid valve 2. A discharge valve 7 is installed on the exhaust pipe. After the test, opening the discharge valve 7 allows the gas in the storage tank to be discharged. The connection before the throttling solenoid valve 2 allows for control of the exhaust rate, making the exhaust process safer and more controllable.

[0049] Pressure display principle: The pressure gauge 10 installed on the third pipeline displays the gas pressure value in the storage tank in real time, providing operators with intuitive pressure data, facilitating observation and judgment of the pressure situation during the test, and ensuring that the test is carried out within a safe and effective pressure range.

[0050] Example 2 like Figure 2 As shown, this is a specific embodiment of the air-tightness testing equipment for diaphragm tanks provided in this implementation, including: an equipment mounting frame 8, on which the air-tightness testing system for diaphragm tanks described in the above scheme is mounted.

[0051] like Figure 2 , Figure 3As shown, in this embodiment, the gas filling test system for the diaphragm tank airtightness inspection has two sets. One set serves as the gas filling test system for the oxidizer chamber of the tank, and the other set serves as the gas filling test system for the fuel chamber of the tank. That is, the two sets of gas filling test systems for the diaphragm tank airtightness inspection have two sets of process gas cylinders 3. The volume of the first set of process gas cylinders 31 is the same as the volume of the oxidizer chamber of the tank, and the volume of the second set of process gas cylinders 33 is the same as the volume of the fuel chamber of the tank. This configuration allows for simultaneous airtightness testing of both the oxidizer chamber and the fuel chamber of the tank.

[0052] like Figure 2 , Figure 3 As shown, in some embodiments, the device mounting frame 8 has an operation panel 81, a first side plate 82, and a second side plate 86. The operation panel 81 is equipped with a valve control component. The first side plate 82 has an air inlet a1, and the second side plate 86 has an air filling port a2 and a refill port a3. The device mounting frame 8 integrates the system, facilitating operation and use.

[0053] like Figure 2 , Figure 3 As shown, the valve operating components include: a first air intake shut-off valve control component 11 and a second air intake shut-off valve control component 13. The first air intake shut-off valve control component 11 is the control component for the air intake shut-off valve 1 of the first group of inflation test systems, and the second air intake shut-off valve control component 13 is the control component for the air intake shut-off valve 1 of the second group of inflation test systems.

[0054] like Figure 2 , Figure 3 As shown, the air inlet a1 includes: a first air inlet a11 and a second air inlet a13. The first air inlet a11 is the air inlet a1 of the first group of inflation test systems, and the second air inlet a13 is the air inlet a1 of the second group of inflation test systems.

[0055] like Figure 2 , Figure 3 As shown, the inflation port a2 includes: a first inflation port a21 and a second inflation port a23. The first inflation port a21 is the inflation port a2 of the first group of inflation test systems, and the second inflation port a23 is the inflation port a2 of the second group of inflation test systems.

[0056] like Figure 2 , Figure 3 As shown, the filling port a3 includes: a first filling port a31 and a second filling port a33. The first filling port a31 is the filling port a3 of the first group of inflation test systems, and the second filling port a33 is the filling port a3 of the second group of inflation test systems.

[0057] like Figure 2 ,Figure 3 As shown, the pressure gauge 10 includes a first pressure gauge 101 and a second pressure gauge 102. The first pressure gauge 101 is the pressure gauge 10 of the first group of inflation test systems, and the second pressure gauge 102 is the pressure gauge 10 of the second group of inflation test systems.

[0058] like Figure 2 , Figure 3 As shown, the differential pressure transmitter 5 includes: a first differential pressure transmitter 51 and a second differential pressure transmitter 53. The first differential pressure transmitter 51 is the differential pressure transmitter 5 of the first group of inflation test systems, and the second differential pressure transmitter 53 is the differential pressure transmitter 5 of the second group of inflation test systems.

[0059] like Figure 2 , Figure 3 As shown, the digital display instrument 6 includes: a first digital display instrument 61 and a second digital display instrument 63. The first digital display instrument 61 is the digital display instrument 6 of the first group of inflation test systems, and the second digital display instrument 63 is the digital display instrument 6 of the second group of inflation test systems.

[0060] like Figure 2 , Figure 3 As shown, the filter 4 includes: a first set of filters 41 and a second set of filters 43. The first set of filters 41 is the filter 4 of the first inflation test system, and the second set of filters 43 is the filter 4 of the second inflation test system.

[0061] like Figure 2 , Figure 3 As shown, the throttling solenoid valve 2 includes: a first throttling solenoid valve 21, a second throttling solenoid valve 22, a third throttling solenoid valve 23, and a fourth throttling solenoid valve 24. The first throttling solenoid valve 21 and the second throttling solenoid valve 22 are the throttling solenoid valves 2 of the first group of inflation test systems, and the third throttling solenoid valve 23 and the fourth throttling solenoid valve 24 are the throttling solenoid valves 2 of the second group of inflation test systems.

[0062] like ​ , ​ As shown, in some embodiments, the equipment mounting frame 8 includes a frame 85 and a base plate 83. The base plate 83 is used to mount the controller 9, and the bottom of the frame 85 is provided with a moving device. Specifically, the moving device can be casters 84. The moving device facilitates the movement of the equipment. Of course, the above description is not limiting; in some alternative embodiments, the moving device can also be other structures, such as rails.

[0063] How to use: First, the first filling port a31 of the first set of air filling test system is connected to the oxidizer chamber of the storage tank, and the first air filling port a21 is connected to the air chamber corresponding to the oxidizer chamber of the storage tank; the second filling port a33 of the second set of air filling test system is connected to the fuel chamber of the storage tank, and the second air filling port a23 is connected to the air chamber corresponding to the fuel chamber of the storage tank.

[0064] Then, the operation is performed using the valve control unit on the control panel 81. If a charging test is required for the oxidizer chamber, the first intake shut-off valve control unit 11 is used to open the intake shut-off valve 1 at the first intake port a11; if a charging test is required for the fuel chamber, the second intake shut-off valve control unit 13 is used to open the intake shut-off valve 1 at the second intake port a13.

[0065] The controller 9 controls the opening of the first throttling solenoid valve 21, the second throttling solenoid valve 22, the third throttling solenoid valve 23 and the fourth throttling solenoid valve 24 in real time according to the signals fed back by the first differential pressure transmitter 51 and the second differential pressure transmitter 53, so as to ensure that the gas chamber and liquid chamber pressure of the oxidant chamber and the fuel chamber of the storage tank are consistent and to prevent the diaphragm from flipping.

[0066] Simultaneously, when conducting airtightness tests on the oxidizer chamber and fuel chamber of the storage tank, air is introduced into the oxidizer chamber and fuel chamber of the storage tank and the corresponding process gas cylinders 3 (the first set of process gas cylinders 31 and the second set of process gas cylinders 33) through two sets of diaphragm storage tank airtightness inspection filling test systems, according to the working mode of the diaphragm storage tank airtightness inspection filling test systems.

[0067] During the test, the data from the digital display instrument 6 and pressure gauge 10 were continuously observed to ensure that the pressure was stable and met the test requirements, thus ensuring the smooth progress of the airtightness test.

[0068] After the test, open the exhaust valve 7 at exhaust port a4 to release the gas in the storage tank.

[0069] Working principle: System integration principle: The equipment mounting frame 8 integrates two sets of air tightness inspection inflation test systems for diaphragm storage tanks, facilitating operation and use. The control panel 81 centrally houses the valve control components, making it convenient for operators to control the system; the first side plate 82 and the second side plate 86 are respectively equipped with an air inlet a1, an inflation port a2, and a filling port a3, with a reasonable layout of interfaces for easy connection to the storage tank.

[0070] Dual-chamber test principle: Two sets of gas filling test systems for diaphragm tank airtightness inspection, one set for gas filling test of the oxidizer chamber of the tank, and the other set for gas filling test of the fuel chamber of the tank. The volume of the first set of process gas cylinders 31 is the same as the volume of the oxidizer chamber of the tank, and the volume of the second set of process gas cylinders 33 is the same as the volume of the fuel chamber of the tank. In this way, the airtightness test of the oxidizer chamber and the fuel chamber of the tank can be performed simultaneously and independently. The components of the two sets of systems ensure the pressure balance of the gas chamber and the liquid chamber, preventing diaphragm overturning.

[0071] Component Working Principle: Each component in each group of the gas filling test system, such as the inlet shut-off valve 1, throttling solenoid valve 2, filter 4, differential pressure transmitter 5, digital display instrument 6, and pressure gauge 10, works independently yet cooperates with each other. Taking the first group of gas filling test systems as an example, gas is introduced through the first inlet a11. The first throttling solenoid valve 21 and the second throttling solenoid valve 22 control the gas flow rate entering the first group of process gas cylinders 31 and entering the oxidizer chamber of the storage tank through the first filling port a31, respectively. The first differential pressure transmitter 51 detects the pressure difference between the first filling port a31 and the first filling port a21 and displays the pressure difference data through the first digital display instrument 61. The controller 9 controls the opening of the throttling solenoid valve 2 based on the pressure difference signal. The first pressure gauge 101 displays the gas pressure value in the oxidizer chamber of the storage tank. Similarly, the second group of gas filling test systems performs similar gas filling and pressure control work for the fuel chamber of the storage tank.

[0072] Movement principle: The bottom of the frame 85 of the equipment mounting frame 8 is equipped with casters 84 as a movement device. By rolling the casters 84, the entire equipment can be easily moved to the required test site, improving the mobility and convenience of the equipment.

[0073] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the present invention.

Claims

1. An inflation test system for checking the airtightness of a diaphragm tank, characterized in that, include: The gas inlet (a1), filling port (a3), and charging port (a2) are provided. The gas inlet (a1) is connected to the process gas cylinder (3) through a first pipe and to the filling port (a3) ​​through a second pipe. Throttling solenoid valves (2) are respectively provided on the first pipe and the second pipe. The charging port (a2) is connected to the process gas cylinder (3) through a third pipe. A differential pressure transmitter (5) is connected between the filling port (a3) ​​and the air filling port (a2); The controller (9) is connected to the differential pressure transmitter (5) via an electrical signal and is electrically connected to the throttling solenoid valve (2) on the first pipeline and the second pipeline.

2. The inflation test system for checking the airtightness of a diaphragm tank according to claim 1, characterized in that, The process gas cylinder (3) consists of at least two cylinders as a group, and their total volume is consistent with the volume of the oxidant chamber or fuel chamber of the storage tank.

3. The air-filling test system for checking the airtightness of a diaphragm tank according to claim 1, characterized in that, It has at least two filling ports (a3).

4. The air-filling test system for checking the airtightness of a diaphragm tank according to claim 3, characterized in that, Each of the filling ports (a3) ​​is provided with a filter (4).

5. The inflation test system for checking the airtightness of a diaphragm tank according to any one of claims 1-4, characterized in that, Also includes: The exhaust port (a4) is connected to the throttling solenoid valve (2) of the first pipe and the second pipe respectively through the exhaust pipe, and the exhaust pipe is equipped with a discharge valve (7).

6. The inflation test system for checking the airtightness of a diaphragm tank according to any one of claims 1-4, characterized in that, The air inlet (a1) is equipped with an air inlet shut-off valve (1).

7. The inflation test system for checking the airtightness of a diaphragm tank according to any one of claims 1-4, characterized in that, A pressure gauge (10) is installed on the third pipeline.

8. An air-filling test device for checking the airtightness of a diaphragm storage tank, characterized in that, include: The equipment mounting frame (8) is equipped with an air-filling test system for air tightness inspection of diaphragm tank according to any one of claims 1-7. The equipment mounting frame (8) has an operation panel (81), a first side plate (82) and a second side plate (86). The operation panel (81) is provided with a valve control component. The first side plate (82) is provided with an air inlet (a1). The second side plate (86) is provided with an air filling port (a2) and a filling port (a3).

9. The air-filling test equipment for checking the airtightness of a diaphragm tank according to claim 8, characterized in that, The bottom of the equipment mounting frame (8) is provided with a moving device.

10. The air-filling test equipment for airtightness testing of diaphragm tanks according to claim 8 or 9, characterized in that, The equipment mounting frame (8) contains at least two sets of the air-tightness testing system for the diaphragm tank.

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