Integrity leak detector suitable for flexible container

Abstract

The utility model relates to the technical field of leak hunting instruments, and discloses an integrity leak hunting instrument suitable for a flexible container, which comprises a leak hunting device arranged in a cabinet, the leak hunting device comprises a gas source inlet, a large-flow electric proportional valve, a high-precision electric proportional valve and a high-precision micro-pressure sensor which are connected, and the gas source inlet is connected with a pressure reducing valve. The pressure reducing valve is respectively connected with a large-flow electric proportional valve and a high-precision electric proportional valve, and two pipelines of the large-flow electric proportional valve and the high-precision electric proportional valve are combined into one pipeline through a three-way connector and connected with a normally-open two-way electric ball valve a. According to the device, an airflow channel is replaced according to use and operation requirements, and when the device is used, the integrity test is ensured to be completed, and test gas can be emptied after the test is completed. The device is provided with the normally-open and normally-closed two-way electric ball valves, when the device is powered on again after being suddenly powered off, a test object can be prevented from being burst by instantaneous inflation pressure, and the device is safer. The device can supplement gas to a test object according to different operation requirements, and is high in practicability.

Description

Technical Field

[0001] The utility model relates to the field of leak detectors, in particular to an integrity leak detector suitable for flexible containers. Background Art

[0002] In modern pharmaceutical processes, disposable pharmaceutical systems with specific functions are often used. Disposable pharmaceutical systems usually use disposable flexible containers made of thin films, including mixing bags, liquid storage bags, etc., for the storage and stirring of drug solutions. Usually, these disposable flexible containers are tested for integrity after production or before / after use by users to determine whether they have leakage defects. Existing integrity testing equipment does not exhaust air sufficiently, and after natural deflation, the container is still swollen, making it inconvenient to store.

[0003] The patent application with announcement number CN114608766B discloses a fuel cell air tightness detection device and a detection method thereof, including an air filter, a pressure regulating valve I, a pressure regulating valve II, a pressure sensor P0, a pressure sensor P1, a pressure sensor P2, a three-way joint, a flow meter, a one-way valve, a differential pressure leak detector and a silencer; three silencers are provided, and the silencers are respectively connected in series to the hydrogen outlet, the air outlet and the water outlet of the fuel cell stack; the one-way valve is connected to the three-chamber inlet of the fuel cell to ensure that the gas can only flow in one direction, the one-way valve is connected in series with the flow meter, the pressure sensor P0, the pressure regulating valve I and the air filter in sequence, the pressure regulating valve I is used to adjust the intake pressure of the test piece, and the air filter is connected to an external air source; the pressure regulating valve II is used to adjust the intake pressure of the differential pressure leak detector.

[0004] This prior art cannot automatically change the gas flow channel according to the use operation requirements, and cannot be used to empty the test gas in the test object after the test is completed.

[0005] Therefore, a new technical solution is needed to solve the above technical problems. Utility Model Content

[0006] The utility model aims to provide an integrity leak detector suitable for a flexible container, which can exhaust the test gas in the test object after the test is completed while ensuring the completion of the integrity test.

[0007] The technical solution adopted by the utility model is:

[0008] A leak detector for integrity of flexible containers, comprising a leak detection device arranged in a cabinet, the leak detection device comprising an air source inlet, a large flow electric proportional valve, a high-precision electric proportional valve, and a high-precision micro-pressure sensor connected and arranged, the air source inlet is connected to a pressure reducing valve, the pressure reducing valve is respectively connected to the large flow electric proportional valve and the high-precision electric proportional valve, the two-line pipelines of the large flow electric proportional valve and the high-precision electric proportional valve are combined into one pipeline through a three-way joint, connected to a normally open two-way electric ball valve a, and the normally open two-way electric ball valve a is connected to a bag body.

[0009] By adopting the above structure, the inflation path can be automatically switched during the detection process, making the use more flexible.

[0010] Preferably, a pressure sensor is provided between the gas source inlet and the pressure reducing valve.

[0011] By adopting the above structure and using a pressure reducing valve, the pressure of the gas source entering the equipment is adjusted to ensure the safety of internal electrical components.

[0012] Preferably, a normally closed two-way electric ball valve a is arranged between the large-flow electric proportional valve and the three-way connector.

[0013] Preferably, a normally closed two-way electric ball valve b is arranged between the high-precision electric proportional valve and the three-way connector.

[0014] By adopting the above structure, a normally closed two-way electric ball valve is used to control the on and off of the gas path. When the power is on, it is a passage, and when the power is off, it is a closed circuit.

[0015] Preferably, a filter is arranged between the normally open two-way electric ball valve a and the three-way joint, and the filter is respectively connected to the normally open two-way electric ball valve b and the normally open two-way electric ball valve c, and the normally open two-way electric ball valve b and the normally open two-way electric ball valve c are both connected to the exhaust port.

[0016] By adopting the above structure, a normally open two-way electric ball valve is used to control the on and off of the gas path, which is a closed circuit when power is on and a pass circuit when power is off.

[0017] Preferably, a vacuum pump is provided between the normally open two-way electric ball valve b and the exhaust port.

[0018] By adopting the above structure, a vacuum pump is used to assist exhaust, that is, to evacuate the test object.

[0019] Preferably, a high-precision micro-pressure sensor and a micro-hole socket are connected between the normally open two-way electric ball valve a and the bag body.

[0020] By adopting the above structure, a high-precision micro-pressure sensor is used for pressure detection. After the set pressure is reached in the test object and the pipeline, ventilation is stopped and pressure is maintained. The change in the pressure value obtained by the high-precision micro-pressure sensor is used to know whether the test object is leaking. The microporous socket is the insertion position of the microporous plug. The inserted microporous plug is calibrated, that is, the size of the micropore is known. The test object is used to compare the size of the leakage aperture on the test object.

[0021] Preferably, the cabinet includes an outer shell and a bottom plate, and a stainless steel quick-tightening joint is provided on the side of the outer shell.

[0022] Compared with the prior art, the utility model has the following beneficial effects:

[0023] 1. The device of the utility model can replace the air flow channel according to the use and operation requirements. The device can be used to ensure the completion of the integrity test and at the same time, the test gas in the test object can be emptied after the test is completed.

[0024] 2. The utility model device is provided with a normally open and normally closed two-way electric ball valve, which can prevent the instantaneous inflation pressure from bursting the test object when the device is powered on again after a sudden power failure.

[0025] 3. The utility model device uses a large-flow electrical proportional valve and a high-precision electrical proportional valve at the same time, which can quickly inflate or slowly and accurately replenish gas to the test object according to different operating requirements, and has strong practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a system flow diagram of the device of the utility model;

[0027] Figure 2 It is a structural diagram of the utility model;

[0028] Figure 3 It is a schematic diagram of the internal structure of the utility model;

[0029] Figure 4 It is a schematic diagram of the internal structure of the utility model.

[0030] Among them: 1. Gas source inlet; 2. Pressure sensor; 3. Pressure reducing valve; 4. Large flow electrical proportional valve; 5. High-precision electrical proportional valve; 6.1. Normally closed two-way electric ball valve a; 6.2. Normally closed two-way electric ball valve b; 7.1. Normally open two-way electric ball valve a; 7.2. Normally open two-way electric ball valve b; 7.3. Normally open two-way electric ball valve c; 8. High-precision micro-pressure sensor; 9. Micro-pore socket; 10. Vacuum pump; 11. Filter; 12. Bag body; 13. Exhaust port; 14. Cabinet; 15. Housing; 16. Stainless steel quick-tighten connector; 17. Bottom plate. DETAILED DESCRIPTION

[0031] like Figure 1-4 As shown, a leak detector for integrity of flexible containers includes a leak detection device arranged in a cabinet 14, the cabinet 14 includes a housing 15 and a bottom plate 17, a stainless steel quick-tightening joint 16 is arranged on the side of the housing 15, the leak detection device includes a gas source inlet 1 and a large flow electric proportional valve 4, a high-precision electric proportional valve 5, and a high-precision micro-pressure sensor 8 connected and arranged, the gas source inlet 1 is connected to a pressure reducing valve 3, the pressure reducing valve 3 is respectively connected to the large flow electric proportional valve 4 and the high-precision electric proportional valve 5, the external gas source is divided into two routes after passing through the pressure reducing valve 3, one route is controlled by the large flow electric proportional valve 4, and the other route is controlled by the high-precision electric proportional valve 5, the two-line pipelines of the large flow electric proportional valve 4 and the high-precision electric proportional valve 5 are combined into one pipeline through a three-way joint, connected to a normally open two-way electric ball valve a 7.1, and the normally open two-way electric ball valve a 7.1 is connected to the bag body 12. A pressure sensor 2 is arranged between the gas source inlet 1 and the pressure reducing valve 3. The device can replace the airflow channel according to the use and operation requirements. The device can exhaust the test gas in the test object after the test is completed while ensuring the completion of the integrity test. The device also uses a large-flow electrical proportional valve 4 and a high-precision electrical proportional valve 5, which can quickly inflate or slowly and accurately replenish gas to the test object according to different operation requirements, and is highly practical.

[0032] A normally closed two-way electric ball valve a6.1 is arranged between the large flow electric proportional valve 4 and the three-way joint. A normally closed two-way electric ball valve b6.2 is arranged between the high-precision electric proportional valve 5 and the three-way joint.

[0033] A filter 11 is arranged between the normally open two-way electric ball valve a7.1 and the three-way joint, and the filter 11 is respectively connected to the normally open two-way electric ball valve b7.2 and the normally open two-way electric ball valve c7.3, and the normally open two-way electric ball valve b7.2 and the normally open two-way electric ball valve c7.3 are both connected to the exhaust port 13. A vacuum pump 10 is arranged between the normally open two-way electric ball valve b7.2 and the exhaust port 13. As an exhaust branch, the filter 11 can prevent the external unclean gas from entering the interior from the normally open two-way electric ball valve a7.1 when the power is accidentally cut off. The device is provided with normally open and normally closed two-way electric ball valves, which can prevent the instantaneous inflation pressure from bursting the test object when the device is powered on again after a sudden power outage, and is safer when used.

[0034] A high-precision micro-pressure sensor 8 and a micro-pore socket 9 are connected between the normally open two-way electric ball valve a 7.1 and the bag body 12 as a leak detection unit.

[0035] The working process of this device:

[0036] General workflow:

[0037] Equipment purging (before leak detection): air enters from the gas source inlet 1, passes through the pressure reducing valve 3, and then passes through the large-flow electric proportional valve 4, the normally closed two-way electric ball valve a6.1, the high-precision electric proportional valve 5, the normally closed two-way electric ball valve b6.2, and the normally open two-way electric ball valve a7.1, and then the gas is discharged from the equipment;

[0038] Air intake: the air source enters the main body of the detection equipment, and the pressure sensor 2 detects whether the connected air source has pressure and the pressure size to ensure that the connected air source has pressure. The air source passes through the pressure reducing valve 3 to make the first pressure adjustment to ensure the safety of the electrical components behind the pressure reducing valve 3. After setting the test demand pressure, the air source passes through the large-flow electrical proportional valve 4, the normally closed two-way electric ball valve a 6.1, and the normally open two-way electric ball valve a 7.1. The air source is filled into the test object, that is, the bag body 12. When the high-precision micro-pressure sensor 8 detects that the pressure in the test object is about to reach the set value, the inflation path is automatically switched, and the large-flow inflation path is closed. The air source is filled into the test object from the high-precision electrical proportional valve 5, the normally closed two-way electric ball valve b 6.2, and the normally open two-way electric ball valve a 7.1. When the pressure in the test object reaches the set value, the inflation route is closed.

[0039] Exhaust: After the test is completed, the gas in the test object is exhausted through the normally open two-way electric ball valve a 7.1, the filter 11, the normally open two-way electric ball valve b7.2, and the vacuum pump 10. After the test object is emptied of gas, the test object is easy to store. Normal exhaust is that the vacuum pump 10 actively exhausts the gas outwards. At this time, the normally open two-way electric ball valve a 7.1 can also be powered off to exhaust the gas together; when the power is off, the normally open two-way electric ball valve a 7.1 exhausts the gas outwards to protect the test object.

[0040] Special workflow:

[0041] During the normal operation of the equipment, there is a sudden power failure. In order to prevent the instantaneous inflation pressure from breaking the test object when the power is turned on again, a normally open two-way electric ball valve a7.1 is set to discharge the internal gas after the power is turned off. That is, the gas in the test object is discharged through the normally open two-way electric ball valve a7.1, the filter 11, and the normally open two-way electric ball valve c7.3 until the gas pressure in the test object is the same as the external air pressure. When the filter 11 is exhausted after the power is turned off, it can prevent the external gas from flowing back and contaminating the test object.

[0042] The above-mentioned normally open two-way electric ball valve: normally closed when power is on, normally open when power is off; the normally closed two-way electric ball valve: normally open when power is on, normally closed when power is off.

[0043] The embodiments described above are merely descriptions of preferred implementation modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by those skilled in the art should be included in the protection scope determined by the claims of the present invention.

Claims

1. An integrity leak detector for a flexible container, comprising a leak detection device arranged in a cabinet, characterized in that: The leak detection device includes an air source inlet, a large-flow electric proportional valve, a high-precision electric proportional valve, and a high-precision micro-pressure sensor that are connected. The air source inlet is connected to a pressure reducing valve, which are respectively connected to the large-flow electric proportional valve and the high-precision electric proportional valve. The two-line pipelines of the large-flow electric proportional valve and the high-precision electric proportional valve are combined into one pipeline through a three-way joint and connected to a normally open two-way electric ball valve a, which is connected to the bag body.

2. The integrity leak detector for a flexible container according to claim 1, characterized in that: A pressure sensor is provided between the gas source inlet and the pressure reducing valve.

3. The integrity leak detector for a flexible container according to claim 2, characterized in that: A normally closed two-way electric ball valve a is arranged between the large flow electric proportional valve and the three-way joint.

4. The integrity leak detector for a flexible container according to claim 1, characterized in that: A normally closed two-way electric ball valve b is arranged between the high-precision electric proportional valve and the three-way connector.

5. The integrity leak detector for a flexible container according to claim 1, characterized in that: A filter is arranged between the normally open two-way electric ball valve a and the three-way joint, and the filter is respectively connected to the normally open two-way electric ball valve b and the normally open two-way electric ball valve c, and the normally open two-way electric ball valve b and the normally open two-way electric ball valve c are both connected to the exhaust port.

6. The integrity leak detector for a flexible container according to claim 5, characterized in that: A vacuum pump is provided between the normally open two-way electric ball valve b and the exhaust port.

7. The integrity leak detector for a flexible container according to claim 1, characterized in that: A high-precision micro-pressure sensor and a micro-hole socket are connected between the normally open two-way electric ball valve a and the bag body.

8. The integrity leak detector for a flexible container according to claim 1, characterized in that: The cabinet comprises an outer shell and a bottom plate, and a stainless steel quick-tightening joint is arranged on the side of the outer shell.

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