Detection method of soft bag integrity cyclic detection system

Abstract

The invention discloses a detection method of a soft bag integrity cyclic detection system. The detection system comprises a gas transmission unit, a gas supply unit, a gas pressure detection unit, a valve assembly and a control unit. The detection method comprises the following steps that S1, inflation, pressure maintaining and integrity detection are conducted on the first soft bag; s2, after the first soft bag is detected, gas in the first soft bag is conveyed to a second soft bag, and gas supplementation, pressure maintaining and integrity detection are conducted on the second soft bag; s3, after the second soft bag is detected, gas in the second soft bag is conveyed to the new first soft bag, and gas supplementation, pressure maintaining and integrity detection are conducted on the new first soft bag; and S4, circularly replacing the soft bag to be detected, and repeating the processes of gas transfer, gas supply, pressure maintaining and integrity detection. According to the detection method of the soft bag integrity cyclic detection system provided by the invention, the test gas is recycled, so that waste is avoided, and the use cost is saved.

Description

Technical Field

[0001] This invention relates to a detection method for a cyclic detection system for the integrity of soft bags. Background Technology

[0002] In order to accelerate the production cycle of biopharmaceuticals, improve production efficiency, and reduce production costs, the biopharmaceutical industry has gradually replaced stainless steel bioreactors with disposable sterile soft bags for biofermentation. Against this backdrop, the safety and stability of disposable soft bags face significant challenges. To ensure the airtightness and integrity of the soft bags, a series of measures are typically taken for testing and verification.

[0003] Current common methods for testing the integrity of disposable soft bags generally use the "pressure drop method," where the integrity testing equipment uses air to fill the bag and detect the pressure drop. This method can only detect leaks, but cannot pinpoint the location of the leak.

[0004] Products with high pressure drops require leak screening. This involves evacuating the air and then re-testing with helium to find leaks. Typically, this is done by filling the bag with a certain amount of helium to maintain a positive pressure difference between the inside and outside environment. After filling, all gas transmission channels are closed, and an external helium leak detector scans the bag's surface. Due to the small size of helium atoms and their extremely low abundance in the atmosphere, any helium atoms leaking from the bag surface will trigger an alarm, thus confirming the bag's integrity. However, current testing methods involve purging all the helium after the test, resulting in high helium costs and significant waste. Furthermore, this method does not allow for the reuse of helium, leading to low efficiency and high cost.

[0005] Therefore, a detection method for a soft bag integrity cyclic detection system is proposed to address the above problems. Summary of the Invention

[0006] The purpose of this invention is to overcome the shortcomings of existing systems and provide a detection method for a soft bag integrity cycle detection system, which recycles the test gas to avoid waste and save on usage costs.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a detection method for a soft bag integrity cycle detection system, the detection system comprising a gas transmission unit, a gas replenishment unit, a gas pressure detection unit, a valve assembly, and a control unit; The gas transmission unit includes a first pipeline and a reversing device; the two ends of the first pipeline are respectively connected to a first soft bag and a second soft bag, and the reversing device is located in the middle of the first pipeline to realize the gas circulation reversing inflation. The gas replenishment unit is connected to the first pipeline and is used for gas replenishment during testing; The gas pressure detection unit is installed on the first pipeline and the gas supply unit, and is used to detect gas data in real time. The valve assembly is installed in the first pipeline and the gas supply unit, and the control unit is communicatively connected to the valve assembly to realize gas pressure control and directional gas supply in the pipeline; The air pressure detection unit is communicatively connected to the control unit; The detection method includes the following steps: Step S1: Inflate, pressurize, and inspect the integrity of the first soft bag; Step S2: After the first soft bag is tested, the gas inside it is transferred to the second soft bag, and the second soft bag is replenished with gas, pressure maintained, and its integrity is tested. Step S3: After the second soft bag is tested, the gas inside it is transferred to the new first soft bag, and the new first soft bag is replenished with gas, pressure maintained, and its integrity is tested. Step S4: Replace the soft bag to be tested cyclically, and repeat the gas transfer, gas replenishment, pressure holding and integrity testing process.

[0008] Step S1 includes: Step S11: Open the relevant valves on the second pipeline and the first branch, and the air source fills the first soft bag with air; Step S12: After the first soft bag is filled, a pressure holding operation is performed; if the pressure holding meets the preset requirements, the test is completed; if not, a helium probe is used to check for leaks, and after manual handling, the test is manually repeated.

[0009] Step S2 includes: Step S21: Control the opening of all valves on the first pipeline, and the second fan draws gas from the first soft bag and delivers it to the second soft bag; Step S22: If the first pressure sensor detects insufficient gas pressure, the control unit opens the helium cylinder and replenishes the second soft bag with gas through the second pipeline and the second branch. Step S23: After the second soft bag reaches the set pressure, a pressure holding operation is performed; if the pressure holding meets the preset requirements, the test is completed; if it does not meet the requirements, a helium probe is used to check for leaks, and after manual handling, the test is manually repeated.

[0010] Step S3 includes: Step S31: Replace the first soft bag with a new one. The control unit controls the valves on the first pipeline to open, and the first fan draws gas from the second soft bag and delivers it to the new first soft bag. Step S32: If the second pressure sensor detects insufficient gas pressure, the control unit opens the helium cylinder and replenishes the new first soft bag with gas through the second pipeline and the first branch. Step S33: After the new first soft bag reaches the set pressure, a pressure holding operation is performed; if the pressure holding meets the preset requirements, the test is completed; if it does not meet the requirements, a helium probe is used to check for leaks, and after manual handling, the test is manually repeated.

[0011] During each transfer of gas from the tested soft bag to the soft bag to be tested, the corresponding pressure sensor monitors the gas pressure in real time, and automatically starts the helium cylinder to replenish gas when the gas pressure is insufficient, until the pressure inside the soft bag to be tested reaches the set value.

[0012] The detection system includes a gas transmission unit, a gas supply unit, a gas pressure detection unit, a valve assembly, a control unit, and a control device; The gas transmission unit includes a first pipeline and a reversing device; the two ends of the first pipeline are respectively connected to a first soft bag and a second soft bag, and the reversing device is located in the middle of the first pipeline to realize the gas circulation reversing inflation. The gas replenishment unit is connected to the first pipeline and is used for gas replenishment during testing; The gas pressure detection unit is installed on the first pipeline and the gas supply unit, and is used to detect gas data in real time. The valve assembly is installed in the first pipeline and the gas supply unit, and the control unit is communicatively connected to the valve assembly to realize gas pressure control and directional gas supply in the pipeline; The air pressure detection unit is communicatively connected to the control unit; A control device, comprising a memory, a processor, and a machine-executable program stored in the memory and running on the processor, wherein the processor executes the machine-executable program to implement the detection method.

[0013] Preferably, the reversing device includes a first fan, a second fan, a first two-position three-way solenoid valve, and a second two-position three-way solenoid valve; the first fan and the second fan are arranged in the middle of the first pipeline, and the air outlets of the first fan and the second fan are arranged in opposite directions; The first two-position three-way solenoid valve is electrically connected to the first fan; the second two-position three-way solenoid valve is electrically connected to the second fan. The first two-position three-way solenoid valve and the second two-position three-way solenoid valve are communicatively connected to the control unit.

[0014] Preferably, the gas replenishment unit includes a helium cylinder, the outlet of which is connected to a second pipeline, and the other end of the second pipeline is connected to a first branch and a second branch respectively; the other end of the first branch is connected between the first soft bag and the reversing device; the other end of the second branch is connected between the reversing device and the second soft bag.

[0015] Preferably, the air pressure detection unit includes a first pressure sensor, a second pressure sensor, and a third pressure sensor; The first pressure sensor is installed on the first pipeline and is close to one end of the first soft bag; The second pressure sensor is disposed on the first pipeline and near one end of the second soft bag; The third pressure sensor is installed on the second pipeline.

[0016] Preferably, the valve assembly includes a first two-position three-way solenoid valve, a second two-position three-way solenoid valve, a third two-position three-way solenoid valve, and a fourth two-position three-way solenoid valve; The first two-position three-way solenoid valve is installed on the first pipeline, located between the first soft bag and the reversing device; The second two-position three-way solenoid valve is installed on the first branch; The third two-position three-way solenoid valve is installed on the first pipeline, located between the reversing device and the second soft bag; The fourth two-position three-way solenoid valve is installed on the second branch.

[0017] Preferably, the valve assembly further includes a pressure regulating valve disposed on the second pipeline.

[0018] Preferably, the valve assembly further includes a one-way valve, which is disposed on the second pipeline; It also includes a first proportional control valve and a second proportional control valve; Both the first proportional regulating valve and the second proportional regulating valve are installed on the first pipeline. The first proportional regulating valve is located between the first soft bag and the reversing device, and the second proportional regulating valve is located between the second soft bag and the reversing device.

[0019] Preferably, it also includes a third two-position three-way solenoid valve; the third two-position three-way solenoid valve is disposed at the connection between the second pipeline and the first branch and the second branch.

[0020] Preferably, a first filter is provided at the end of the first pipeline near the first soft bag; a second filter is provided at the end of the first pipeline near the second soft bag; and a third filter is provided at the end of the second pipeline near the helium cylinder.

[0021] Compared with existing technologies, the beneficial effects of this invention are as follows: The detection method of this soft bag integrity cyclic detection system achieves real-time control of electrical components through a control system, and performs gas transmission and pressure detection on the test bag and gas recovery storage bag in a planned and adjustable manner. This enables directional transmission and recovery of gas to disposable soft bags, and the addition of an extra helium cylinder allows for the use of gas from the cylinder to refill the test bag when the gas inside the soft bag is insufficient. It combines the pressure drop method and helium leak detection method to detect bag integrity and locate leaks in a single test. By directly transferring the gas to the next bag after the gas integrity test is completed, the test gas is reused. The emptying of the tested bag simultaneously completes the refilling of another bag, improving detection efficiency and achieving gas reuse. Direct helium refilling allows for accurate leak detection in a single test, avoiding the problem of traditional pressure drop methods failing to find leaks and requiring repeated testing.

[0022] This technology solves the problem of helium waste during integrity testing of disposable soft bags. By recycling gas, gas is extracted from the storage bag and filled into the test bag. After the test, the gas in the test bag is extracted and returned to the storage bag, repeating the cycle. This significantly reduces gas consumption during integrity testing of disposable soft bags. It also features an automatic detection function for insufficient gas in the soft bag, automatically activating the backup gas source channel. This high degree of automation ensures product quality, reduces costs, fully utilizes the value of the test gas, effectively reduces production costs for enterprises, and improves production efficiency. Attached Figure Description

[0023] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the detection method of the soft bag integrity cyclic detection system of the present invention; Figure 2 This is a connection diagram of the soft bag integrity cyclic detection system of the present invention; Figure 3 This is a diagram showing the gas flow direction from interface A to interface B during the operation of this invention; Figure 4 This is a diagram showing the gas flow direction from interface B to interface A during the operation of this invention; Figure 5 This is a diagram showing the flow of gas from the helium cylinder to port A during the operation of this invention. Figure 6 This is a diagram showing the flow of gas from the helium cylinder to port B during the operation of this invention. Figure 7 This is a diagram showing the working state of each component during the operation of this invention; Figure 8 This is a flowchart illustrating the control process during the operation of this invention.

[0024] In the diagram: 1. Helium cylinder; PUMP01. First blower; PUMP02. Second blower; TSV01. First two-position three-way solenoid valve; TSV02. Second two-position three-way solenoid valve; TSV03. Third two-position three-way solenoid valve; PI01. First pressure sensor; PI02. Second pressure sensor; PI03. Third pressure sensor; SV01. First two-position three-way solenoid valve; SV02. Second two-position three-way solenoid valve; SV03. Third two-position three-way solenoid valve; SV04. Fourth two-position three-way solenoid valve; PR01. Pressure regulating valve; CV01. Check valve; PV01. First proportional regulating valve; PV02. Second proportional regulating valve; F01. First filter; F02. Second filter; F03. Third filter. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] like Figure 1-8 As shown, a detection method for a flexible bag integrity cyclic detection system is disclosed. The detection system includes a gas transmission unit, a gas replenishment unit, a gas pressure detection unit, a valve assembly, and a control unit. The gas transmission unit includes a first pipeline and a reversing device. The two ends of the first pipeline are respectively connected to a first flexible bag and a second flexible bag. The reversing device is located in the middle of the first pipeline to realize the cyclic reversal of gas filling. The gas replenishment unit is connected to the first pipeline and is used for gas replenishment during detection. The gas pressure detection unit is located on the first pipeline and the gas replenishment unit to detect gas data in real time. The valve assembly is located on the first pipeline and the gas replenishment unit. The control unit is communicatively connected to the valve assembly to realize gas pressure control and directional gas supply in the pipeline. The gas pressure detection unit is communicatively connected to the control unit.

[0027] This flexible bag integrity cyclic testing system uses helium directly for testing, completing pressure drop and leak detection with a single inflation. Compared to existing two-inflation tests—one using compressed air for pressure drop detection and the second using helium for leak detection—this method is more convenient, faster, and lower in cost. The helium can be recycled during the testing process, with very low consumption, less than 3% per test.

[0028] Specifically, the reversing device includes a first fan PUMP01, a second fan PUMP02, a first two-position three-way solenoid valve TSV01, and a second two-position three-way solenoid valve TSV02; the first fan PUMP01 and the second fan PUMP02 are located in the middle of the first pipeline, and the air outlets of the first fan PUMP01 and the second fan PUMP02 are arranged in opposite directions; the first two-position three-way solenoid valve TSV01 is electrically connected to the first fan PUMP01; the second two-position three-way solenoid valve TSV02 is electrically connected to the second fan PUMP02; the first two-position three-way solenoid valve TSV01 and the second two-position three-way solenoid valve TSV02 are communicatively connected to the control unit.

[0029] Specifically, the gas replenishment unit includes a helium cylinder 1, the outlet of which is connected to a second pipeline, and the other end of the second pipeline is connected to a first branch and a second branch respectively; the other end of the first branch is connected between the first soft bag and the reversing device; and the other end of the second branch is connected between the reversing device and the second soft bag.

[0030] Specifically, the air pressure detection unit includes a first pressure sensor PI01, a second pressure sensor PI02, and a third pressure sensor PI03; the first pressure sensor PI01 is located on the first pipeline and near one end of the first soft bag; the second pressure sensor PI02 is located on the first pipeline and near one end of the second soft bag; and the third pressure sensor PI03 is located on the second pipeline.

[0031] Specifically, the valve assembly includes a first two-position three-way solenoid valve SV01, a second two-position three-way solenoid valve SV02, a third two-position three-way solenoid valve SV03, and a fourth two-position three-way solenoid valve SV04; the first two-position three-way solenoid valve SV01 is installed on the first pipeline, located between the first soft bag and the reversing device; the second two-position three-way solenoid valve SV02 is installed on the first branch; the third two-position three-way solenoid valve SV03 is installed on the first pipeline, located between the reversing device and the second soft bag; and the fourth two-position three-way solenoid valve SV04 is installed on the second branch.

[0032] Specifically, the valve assembly also includes a pressure regulating valve PR01, which is disposed on the second pipeline. The valve assembly also includes a one-way valve CV01, which is disposed on the second pipeline; it further includes a first proportional regulating valve PV01 and a second proportional regulating valve PV02; both the first proportional regulating valve PV01 and the second proportional regulating valve PV02 are disposed on the first pipeline, with the first proportional regulating valve PV01 located between the first soft bag and the reversing device, and the second proportional regulating valve PV02 located between the second soft bag and the reversing device.

[0033] Specifically, it also includes a third two-position three-way solenoid valve TSV03; the third two-position three-way solenoid valve TSV03 is located at the connection between the second pipeline and the first branch and the second branch. A first filter F01 is installed at the end of the first pipeline near the first soft bag; a second filter F02 is installed at the end of the first pipeline near the second soft bag; and a third filter F03 is installed at the end of the second pipeline near the helium cylinder 1.

[0034] Specifically, the first interface A and the second interface B are respectively connected to a soft bag to be tested; the first pipeline is opened through the control unit, and the inflation operation from the first interface A to the second interface B is performed in the forward direction; if the pressure detection PI01≤0, the main pipeline and the second branch pipeline of the second pipeline are opened, and the helium cylinder automatically inflates the second interface B; after it is full (the pressure reaches the set value), a pressure holding operation is performed; if the pressure holding meets the preset requirements, the test is completed; if it does not meet the setting, a helium probe is used to check for leaks, and after manual handling, the test is manually repeated. Replace the test bag on the first interface A; open the first pipeline through the control unit and perform the inflation operation from the second interface B to the first interface A in reverse; if the pressure detection PI02≤0, open the main pipeline and the first branch of the second pipeline, and the helium cylinder will automatically inflate the first interface A; after it is full (the pressure reaches the set value), perform a pressure holding operation; if the pressure holding meets the preset requirements, the test is completed; if it does not meet the setting, use a helium probe to check for leaks, handle them manually, and then manually retest; replace the test bag on the second interface B and repeat the operation.

[0035] The detection system includes a gas transmission unit, a gas replenishment unit, a gas pressure detection unit, a valve assembly, a control unit, and a control device; the gas transmission unit includes a first pipeline and a reversing device; the two ends of the first pipeline are respectively connected to a first soft bag and a second soft bag, and the reversing device is located in the middle of the first pipeline to realize the gas circulation reversal and filling; the gas replenishment unit is connected to the first pipeline and is used for gas replenishment during detection; A pressure detection unit is installed on the first pipeline and the gas supply unit to detect gas data in real time; a valve assembly is installed on the first pipeline and the gas supply unit, and the control unit is communicatively connected to the valve assembly to realize pressure control and directional gas supply of the pipeline; the pressure detection unit is communicatively connected to the control unit. The control device includes a memory, a processor, and a machine-executable program stored in the memory and running on the processor, wherein the processor implements the detection method when executing the machine-executable program.

[0036] like Figure 1 As shown, the detection method includes the following steps: Step S1: Inflate, pressurize, and inspect the integrity of the first soft bag; Step S2: After the first soft bag is tested, the gas inside it is transferred to the second soft bag, and the second soft bag is replenished with gas, pressure maintained, and its integrity is tested. Step S3: After the second soft bag is tested, the gas inside it is transferred to the new first soft bag, and the new first soft bag is replenished with gas, pressure maintained, and its integrity is tested. Step S4: Replace the soft bag to be tested cyclically, and repeat the gas transfer, gas replenishment, pressure holding and integrity testing process.

[0037] Step S1 includes: Step S11: Open the relevant valves on the second pipeline and the first branch, and the air source fills the first soft bag with air; Step S12: After the first soft bag is filled, a pressure holding operation is performed; if the pressure holding meets the preset requirements, the test is completed; if not, a helium probe is used to check for leaks, and after manual handling, the test is manually repeated.

[0038] Step S2 includes: Step S21: Control the opening of all valves on the first pipeline, and the second blower PUMP02 draws gas from the first soft bag and delivers it to the second soft bag; Step S22: If the first pressure sensor PI01 detects insufficient gas pressure, the control unit opens the helium cylinder 1 and replenishes the second soft bag with gas through the second pipeline and the second branch. Step S23: After the second soft bag reaches the set pressure, a pressure holding operation is performed; if the pressure holding meets the preset requirements, the test is completed; if it does not meet the requirements, a helium probe is used to check for leaks, and after manual handling, the test is manually repeated.

[0039] Step S3 includes: Step S31: Replace the first soft bag with a new one. The control unit controls the valves on the first pipeline to open, and the first blower PUMP01 draws gas from the second soft bag and delivers it to the new first soft bag. Step S32: If the second pressure sensor PI02 detects insufficient gas pressure, the control unit opens the helium cylinder 1 and replenishes the new first soft bag with gas through the second pipeline and the first branch. Step S33: After the new first soft bag reaches the set pressure, a pressure holding operation is performed; if the pressure holding meets the preset requirements, the test is completed; if it does not meet the requirements, a helium probe is used to check for leaks, and after manual handling, the test is manually repeated.

[0040] Specifically, during each transfer of gas from the tested soft bag to the soft bag to be tested, the corresponding pressure sensor monitors the gas pressure in real time, and automatically starts helium cylinder 1 to replenish gas when the gas pressure is insufficient, until the pressure inside the soft bag to be tested reaches the set value.

[0041] Specifically, interface A connects to the first soft bag, interface B connects to the second soft bag, and helium cylinder 1 is connected to the helium interface. When the control unit starts filling from interface A to interface B, the control unit will determine the filling state based on the data from the first pressure sensor PI01 and the second pressure sensor PI02: when PI01 > 0 (indicating that there is usable gas in the first soft bag) and the second pressure sensor PI02 is less than the set value (indicating that the second soft bag is not full), the control unit will control each valve component to switch to the corresponding state. Under the suction of the second fan PUMP02, the gas in the first soft bag enters the second soft bag at interface B through each component along the corresponding path.

[0042] During inflation, if the value collected by the second pressure sensor PI02 is less than 80% of the set value, the second blower PUMP02, the first proportional flow valve PV01, and the second proportional flow valve PV02 will output full power for rapid inflation. When the value collected by the second pressure sensor PI02 is between 80% and 100% of the set value, the second blower PUMP02 and the second proportional flow valve PV02 will output low power for slow inflation until the value collected by the second pressure sensor PI02 is ≥100% of the set value, at which point the inflation stage is complete. If the gas in the first soft bag at interface A is depleted (the value collected by the first pressure sensor PI01 is less than 0), the control unit will automatically switch to the process of filling interface B from helium cylinder 1. At this time, if the value detected by the third pressure sensor PI03 is greater than 0 (indicating that the helium cylinder has gas), the status of each component will be adjusted to the corresponding status, and the gas will be filled along the path from the helium cylinder to interface B until the second pressure sensor PI02 is ≥100% of the set value, at which point the inflation stage ends.

[0043] After the inflation phase is completed, the system enters the pressure holding phase. At this time, all electrical components are de-energized. The control unit monitors the pressure drop of the second pressure sensor PI02 within 15 minutes. If the pressure drop meets the preset value, the pressure holding is passed and the test ends. If the pressure drop does not meet the preset value, a helium detector probe must be used manually to pinpoint the leak and handle it.

[0044] After the inflation and testing process from interface A to interface B is completed, inflation in that direction cannot be restarted in automatic mode. At this time, a new test bag needs to be connected to interface A, and the inflated bag at interface B is used as the air source bag to start the inflation process from interface B to interface A. During this process, the test bag from the previous round at interface B will be emptied, and the new test bag at interface A will be inflated and tested.

[0045] When inflating from port B to port A, the control unit's logic is as follows: if the second pressure sensor PI02 > 0 (indicating there is air in the air source bag at port B) and the first pressure sensor PI0 is less than the set value (indicating the new bag at port A is not fully inflated), the inflation state is entered. The control unit switches the valve assembly to the corresponding state. Under the suction of the first blower PUMP01, the gas in the air source bag at port B enters the test bag at port A through various components. During inflation, if the value collected by the first pressure sensor PI01 is less than 80% of the set value, the first blower PUMP01, the first proportional flow valve PV01, and the second proportional flow valve PV02 will inflate rapidly at full power. When the first pressure sensor PI01 is between 80% and 100% of the set value, the first blower PUMP01, the first proportional flow valve PV01, and the second proportional flow valve PV02 will inflate slowly at a preset low power until the first pressure sensor PI01 ≥ 100% of the set value, completing the inflation process. If the gas in the gas supply bag at interface B is depleted (the value collected by the second pressure sensor PI02 is less than 0), the system will automatically switch to the process of filling interface A with helium from helium cylinder 1. If the third pressure sensor PI03 > 0, the system will adjust the component status and fill the gas along the path from the helium cylinder to interface A until the first pressure sensor PI01 ≥ 100% of the set value.

[0046] After inflation is complete, the pressure holding phase begins. All electrical components are de-energized, and the control unit monitors the pressure drop of the first pressure sensor PI0 within 15 minutes. The pressure holding process is the same as that from interface A to interface B. If the pressure drop meets the preset value, the test ends; otherwise, manual leak detection is performed.

[0047] After the inflation and testing process from port B to port A is completed, inflation in that direction cannot be restarted in automatic mode. At this point, a new bag to be tested needs to be connected to port B, and the bag filled at port A is used as the air source bag. The inflation process from port A to port B is then restarted. This operation is repeated to achieve a cycle of emptying one bag while inflating and testing a new bag.

[0048] This flexible bag integrity cyclic testing system utilizes a control system to achieve real-time control of electrical components. It allows for planned and adjustable gas transfer and pressure testing between the test bag and the gas recovery storage bag. This enables directional gas transfer and recovery for disposable flexible bags. An additional helium cylinder is included to refill the test bag when the gas inside is insufficient. The system combines pressure drop and helium leak detection methods for simultaneous bag integrity testing and leak location. After integrity testing, the gas is directly transferred to the next bag, allowing for gas reuse. The emptying of the tested bag simultaneously refills another bag, improving testing efficiency and enabling gas reuse. Direct helium refilling allows for precise leak detection in a single test, avoiding the need for repeated testing required by traditional pressure drop methods.

[0049] This technology solves the problem of helium waste during integrity testing of disposable soft bags. By recycling gas, gas is extracted from the storage bag and filled into the test bag. After the test, the gas in the test bag is extracted and returned to the storage bag, repeating the cycle. This significantly reduces gas consumption during integrity testing of disposable soft bags. It also features an automatic detection function for insufficient gas in the soft bag, automatically activating the backup gas source channel. This high degree of automation ensures product quality, reduces costs, fully utilizes the value of the test gas, effectively reduces production costs for enterprises, and improves production efficiency.

[0050] Finally, it should be noted that the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A detection method for a soft bag integrity cycle detection system, the detection system comprising a gas transmission unit, a gas replenishment unit, a gas pressure detection unit, a valve assembly, and a control unit; The gas transmission unit includes a first pipeline and a reversing device; the two ends of the first pipeline are respectively connected to a first soft bag and a second soft bag, and the reversing device is located in the middle of the first pipeline to realize the gas circulation reversing inflation. The gas replenishment unit is connected to the first pipeline and is used for gas replenishment during testing; The gas pressure detection unit is installed on the first pipeline and the gas supply unit, and is used to detect gas data in real time. The valve assembly is installed in the first pipeline and the gas supply unit, and the control unit is communicatively connected to the valve assembly to realize gas pressure control and directional gas supply in the pipeline; The air pressure detection unit is communicatively connected to the control unit; The detection method is characterized by the following steps: Step S1: Inflate, pressurize, and inspect the integrity of the first soft bag; Step S2: After the first soft bag is tested, the gas inside it is transferred to the second soft bag, and the second soft bag is replenished with gas, pressure maintained, and its integrity is tested. Step S3: After the second soft bag is tested, the gas inside it is transferred to the new first soft bag, and the new first soft bag is replenished with gas, pressure maintained, and its integrity is tested. Step S4: Replace the soft bag to be tested cyclically, and repeat the gas transfer, gas replenishment, pressure holding and integrity testing process.

2. The detection method of the soft bag integrity cyclic detection system according to claim 1, characterized in that, Step S1 includes: Step S11: Open the relevant valves on the second pipeline and the first branch, and the air source fills the first soft bag with air; Step S12: After the first soft bag is filled, a pressure holding operation is performed; if the pressure holding meets the preset requirements, the test is completed; if not, a helium probe is used to check for leaks, and after manual handling, the test is manually repeated.

3. The detection method of the soft bag integrity cyclic detection system according to claim 1, characterized in that, Step S2 includes: Step S21: Control the opening of all valves on the first pipeline, and the second blower (PUMP02) draws gas from the first soft bag and delivers it to the second soft bag; Step S22: If the first pressure sensor (PI01) detects insufficient gas pressure, the control unit opens the helium cylinder (1) and replenishes the second soft bag with gas through the second pipeline and the second branch. Step S23: After the second soft bag reaches the set pressure, a pressure holding operation is performed; if the pressure holding meets the preset requirements, the test is completed; if it does not meet the requirements, a helium probe is used to check for leaks, and after manual handling, the test is manually repeated.

4. The detection method of the soft bag integrity cyclic detection system according to claim 1, characterized in that, Step S3 includes: Step S31: Replace the first soft bag with a new one. The control unit controls the valves on the first pipeline to open, and the first blower (PUMP01) draws the gas from the second soft bag and delivers it to the new first soft bag. Step S32: If the second pressure sensor (PI02) detects insufficient gas pressure, the control unit opens the helium cylinder (1) and replenishes the new first soft bag with gas through the second pipeline and the first branch. Step S33: After the new first soft bag reaches the set pressure, a pressure holding operation is performed; if the pressure holding meets the preset requirements, the test is completed; if it does not meet the requirements, a helium probe is used to check for leaks, and after manual handling, the test is manually repeated.

5. The detection method of the soft bag integrity cyclic detection system according to claim 1, characterized in that, During each transfer of gas from the tested soft bag to the soft bag to be tested, the corresponding pressure sensor monitors the gas pressure in real time and automatically starts the helium cylinder (1) to replenish the gas when the gas pressure is insufficient until the pressure inside the soft bag to be tested reaches the set value.

6. A cyclic detection system for the integrity of a soft bag, characterized in that, The detection system includes a gas transmission unit, a gas supply unit, a gas pressure detection unit, a valve assembly, a control unit, and a control device; The gas transmission unit includes a first pipeline and a reversing device; the two ends of the first pipeline are respectively connected to a first soft bag and a second soft bag, and the reversing device is located in the middle of the first pipeline to realize the gas circulation reversing inflation. The gas replenishment unit is connected to the first pipeline and is used for gas replenishment during testing; The gas pressure detection unit is installed on the first pipeline and the gas supply unit, and is used to detect gas data in real time. The valve assembly is installed in the first pipeline and the gas supply unit, and the control unit is communicatively connected to the valve assembly to realize gas pressure control and directional gas supply in the pipeline; The air pressure detection unit is communicatively connected to the control unit; A control device, the control device comprising a memory, a processor, and a machine-executable program stored in the memory and running on the processor, wherein the processor, when executing the machine-executable program, implements the detection method according to any one of claims 1 to 5.

7. The soft bag integrity cyclic detection system according to claim 6, characterized in that, The reversing device includes a first fan (PUMP01), a second fan (PUMP02), a first two-position three-way solenoid valve (TSV01), and a second two-position three-way solenoid valve (TSV02); the first fan (PUMP01) and the second fan (PUMP02) are arranged in the middle of the first pipeline, and the air outlets of the first fan (PUMP01) and the second fan (PUMP02) are arranged in opposite directions; The first two-position three-way solenoid valve (TSV01) is electrically connected to the first fan (PUMP01); the second two-position three-way solenoid valve (TSV02) is electrically connected to the second fan (PUMP02). The first two-position three-way solenoid valve (TSV01) and the second two-position three-way solenoid valve (TSV02) are communicatively connected to the control unit.

8. The soft bag integrity cyclic detection system according to claim 7, characterized in that, The gas replenishment unit includes a helium cylinder (1), the outlet of which is connected to a second pipeline, and the other end of the second pipeline is connected to a first branch and a second branch respectively; the other end of the first branch is connected between the first soft bag and the reversing device. The other end of the second branch is connected between the reversing device and the second soft bag.

9. The soft bag integrity cyclic detection system according to claim 8, characterized in that, The air pressure detection unit includes a first pressure sensor (PI01), a second pressure sensor (PI02), and a third pressure sensor (PI03). The first pressure sensor (PI01) is installed on the first pipeline and is located near one end of the first soft bag; The second pressure sensor (PI02) is installed on the first pipeline and is located near one end of the second soft bag; The third pressure sensor (PI03) is installed on the second pipeline.

10. The soft bag integrity cyclic detection system according to claim 9, characterized in that, The valve assembly includes a first two-position three-way solenoid valve (SV01), a second two-position three-way solenoid valve (SV02), a third two-position three-way solenoid valve (SV03), and a fourth two-position three-way solenoid valve (SV04). The first two-position three-way solenoid valve (SV01) is installed on the first pipeline, located between the first soft bag and the reversing device; The second two-position three-way solenoid valve (SV02) is installed on the first branch; The third two-position three-way solenoid valve (SV03) is installed on the first pipeline, located between the reversing device and the second soft bag; The fourth two-position three-way solenoid valve (SV04) is installed on the second branch; The valve assembly also includes a pressure regulating valve (PR01), which is disposed on the second pipeline; The valve assembly also includes a one-way valve (CV01), which is disposed on the second pipeline; It also includes a first proportional control valve (PV01) and a second proportional control valve (PV02); The first proportional control valve (PV01) and the second proportional control valve (PV02) are both installed on the first pipeline. The first proportional control valve (PV01) is located between the first soft bag and the reversing device, and the second proportional control valve (PV02) is located between the second soft bag and the reversing device.

11. The soft bag integrity cyclic detection system according to claim 10, characterized in that, It also includes a third two-position three-way solenoid valve (TSV03); the third two-position three-way solenoid valve (TSV03) is located at the connection between the second pipeline and the first branch and the second branch.

12. The soft bag integrity cyclic detection system according to claim 11, characterized in that, A first filter (F01) is provided at the end of the first pipeline near the first soft bag; a second filter (F02) is provided at the end of the first pipeline near the second soft bag; and a third filter (F03) is provided at the end of the second pipeline near the helium cylinder (1).

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