Air tightness detection device for double-cavity tubular medical instrument

Abstract

The utility model relates to the technical field of medical instruments, in particular to an air tightness detection device for a double-cavity tubular medical instrument. Comprising a machine body, an operation table arranged on the machine body, an operation panel arranged on the operation table, a pressing air cylinder, a testing air cylinder, a testing port, a testing base, a pressing ejector rod, an air inlet pressure regulating valve, a testing pressure regulating valve, a real-time pressure regulating valve, a testing pressure gauge, a real-time pressure gauge, a flow valve, a flow meter, a PLC and a testing electromagnetic valve set, the double-cavity tubular medical instrument detection device is applied to detection of double-cavity tubular medical instruments, a good effect is achieved, the detection method is optimized, and the detection efficiency is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, and specifically relates to an air tightness detection device for double-lumen tubular medical devices. Background Art

[0002] Double-lumen tubular medical devices that are used in a closed manner have airtightness requirements. If the airtightness is insufficient, it will affect the use effect. Therefore, it is usually necessary to test the airtightness first, but the relevant industry standards do not provide a testing method. If manual testing is used, there are disadvantages of complex operation and low efficiency, and it is easy to make mistakes, resulting in the need for re-testing; in addition, the existing pipeline airtightness testing device requires the use of a water tank. Gas is filled into one end of the tube and the end of the tube is blocked to keep the tube in an inflated and pressurized state. The tube is immersed in water and the airtightness is judged by observing bubbles. The device is complex and will allow the product to come into contact with water, so the product needs to be dried again. However, for medical device products, this method has the risk of excessive initial contamination bacteria. Utility Model Content

[0003] In view of the deficiencies in the prior art, the utility model aims to provide an airtightness detection device for a double-lumen tubular medical device.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an air tightness detection device for a double-lumen tubular medical device, comprising a body, an operating table arranged on the body, an operating panel arranged on the operating table, a pressing cylinder, a test cylinder, a test port, a test base, a pressing ejector rod, an intake pressure regulating valve, a test pressure regulating valve, a real-time regulating valve, a test pressure gauge, a real-time pressure gauge, a flow valve and a flow meter, and a PLC, a test solenoid valve group, a cylinder solenoid valve, a power supply, an air source, a pressure sensor and a flow sensor arranged in the body;

[0005] The test base is installed on the horizontal surface of the operating table. A positioning groove matching the structure of the product to be tested is arranged on the test base. The pressing cylinder is installed on the operating table, and the piston end of the pressing cylinder is vertically downwardly arranged facing the test base. The pressing push rod is installed on the piston end of the pressing cylinder, and the pressing push rod matches the test base.

[0006] The test cylinder is installed on the horizontal surface of the operating table, and the piston end of the test cylinder is arranged horizontally toward the test base. The test port is installed on the piston end of the test cylinder. Two matching ports are arranged on the test port. The test port matches the two ports on the syringe adapter to be tested.

[0007] The gas source is divided into two paths for output, which respectively include

[0008] First, after being connected with the intake pressure regulating valve, the test pressure regulating valve and the cylinder solenoid valve in sequence through the air pipeline, they are connected with the test cylinder and the pressing cylinder respectively;

[0009] Second, the air pipeline is connected in sequence with the intake pressure regulating valve, the test pressure regulating valve, the pressure sensor, the flow sensor, the test solenoid valve group and the test port;

[0010] The gas pipeline located on the gas source passage 2 is also connected in sequence with a real-time pressure regulating valve, a real-time pressure gauge, a flow valve and a flow meter;

[0011] The rear end of the test pressure regulating valve is connected with a test pressure gauge;

[0012] The operation panel board, the test solenoid valve group, the cylinder solenoid valve, the pressure sensor and the flow sensor are respectively connected to the PLC;

[0013] The power supply is used to supply power to each power-consuming module.

[0014] In some of the embodiments, the operating table is also provided with an indicator light, a reset button, a power switch and an emergency stop switch, and the indicator light, the reset button, the power switch and the emergency stop switch are respectively connected to corresponding ports on the PLC.

[0015] In some of the embodiments, a test button is respectively provided on both sides of the test base on the operating table, and the two test buttons are respectively connected to the PLC.

[0016] In some embodiments, the test solenoid valve group is a double-outlet linked solenoid valve, and the air inlet end of the double-outlet linked solenoid valve and the air outlet end of the test pressure regulating valve are connected in sequence with a real-time pressure regulating valve, a real-time pressure gauge, a flow valve, a flow meter, a pressure sensor and a flow sensor, and the two air outlets of the double-outlet linked solenoid valve are respectively connected to the two matching ports on the test port.

[0017] In some of the embodiments, a clamping mechanism is disposed on the operating table, and the clamping mechanism is tightly clamped with the end of the product to be tested.

[0018] In some embodiments, the indicator lights include a qualified indicator light, a failed indicator light, and a warning light.

[0019] In some of the embodiments, a cooling fan is disposed inside the machine body.

[0020] Compared with the prior art, the beneficial effects of the utility model are:

[0021] 1. The utility model designs a simple and efficient airtightness testing device, which can be used for airtightness testing of a double-lumen tubular medical device, and provides a general method for determining process parameters, providing a detection guide for airtightness testing of double-lumen tubular medical devices.

[0022] 2. The detection equipment provided by the utility model is simple to manufacture, light in weight, and low in cost. It is also clearer and simpler for the staff to judge whether the double-lumen tubular medical device is qualified. It is applied in the detection of double-lumen tubular medical devices and has achieved good results. It optimizes the detection method, effectively improves the detection efficiency, the test parameter determination method is simple and reliable, and the test results are fast and reliable.

[0023] 3. In the inspection of tubular medical devices, the double-chamber of the utility model can detect the air tightness of one chamber alone, and can also detect whether there is communication between the two chambers, so as to analyze the cause of leakage of unqualified products.

[0024] Details of one or more embodiments of the present application are presented in the following drawings and descriptions to make other features, purposes and advantages of the present application more concise and easy to understand. The present application is fully described and understood through the embodiments of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of module connection of the utility model;

[0026] Figure 2 It is a structural schematic diagram of the utility model;

[0027] Figure 3 It is a top view of the utility model;

[0028] Figure 4 This is a schematic diagram of matching the product under test with the test port.

[0029] In the figure: 1. Machine body; 2. Operating table; 3. Operating panel; 4. Pressing cylinder; 5. Test cylinder; 6. Test port; 7. Test base; 8. Pressing push rod; 9. Inlet pressure regulating valve; 10. Test pressure regulating valve; 11. Real-time pressure regulating valve; 12. Test pressure gauge; 13. Real-time pressure gauge; 14. Flow valve; 15. Flow meter; 16. PLC; 17. Test solenoid valve group; 18. Cylinder solenoid valve; 19. Air source; 20. Pressure sensor; 21. Flow sensor; 22. Reset button; 23. Power switch; 24. Emergency stop switch; 25. Test button; 26. Clamping mechanism; 27. Qualified indicator light; 28. Unqualified indicator light; 29. ​​Alarm light; 30. Cooling fan; 31. Product to be tested. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] Embodiment 1

[0032] See also Figures 1 to 4 The utility model provides a technical solution: an air tightness detection device for a double-lumen tubular medical device, comprising a body 1, an operating table 2 arranged on the body 1, an operating panel 3 arranged on the operating table 2, a pressing cylinder 4, a test cylinder 5, a test port 6, a test base 7, a pressing push rod 8, an intake pressure regulating valve 9, a test pressure regulating valve 10, a real-time pressure regulating valve 11, a test pressure gauge 12, a real-time pressure gauge 13, a flow valve 14 and a flow meter 15, and a PLC 16, a test solenoid valve group 17, a cylinder solenoid valve 18, a power supply, an air source 19, a pressure sensor 20 and a flow sensor 21 arranged in the body 1;

[0033] The test base 7 is installed on the horizontal surface of the operating table 2. The test base 7 is provided with a positioning groove that matches the structure of the product to be tested 31. The pressing cylinder 4 is installed on the operating table 2, and the piston end of the pressing cylinder 4 is vertically downward and facing the test base 7. The pressing push rod 8 is installed on the piston end of the pressing cylinder 4, and the pressing push rod 8 matches the test base 7.

[0034] The test cylinder 5 is installed on the horizontal surface of the operating table 2, and the piston end of the test cylinder 5 is horizontally arranged toward the test base 7. The test port 6 is installed on the piston end of the test cylinder 5. Two matching ports are arranged on the test port 6. The test port 6 matches with the two ports on the syringe adapter to be tested.

[0035] The gas source 19 is divided into two paths for output, which respectively include

[0036] First, after being connected with the intake pressure regulating valve 9, the test pressure regulating valve 10, and the cylinder solenoid valve 18 in sequence through the air pipeline, they are connected with the test cylinder 5 and the pressing cylinder 4 respectively;

[0037] Second, it is connected in sequence with the intake pressure regulating valve 9, the test pressure regulating valve 10, the pressure sensor 20, the flow sensor 21, the test solenoid valve group 17 and the test port 6 through the air pipeline;

[0038] The inlet pressure regulating valve 9 is responsible for adjusting the size of the gas source 19 when it is just connected to the device, and the test pressure regulating valve 10 is responsible for adjusting the strength of the gas source 19 during the test. The two are not adjusted very accurately, and a buffer area will be formed between the two valves to reduce the fluctuation of the gas source 19 and ensure that the gas source 19 is more stable;

[0039] In order to improve the stability of the parameters of the real-time gas source 19 on the two gas outlets of the test solenoid valve group 17,

[0040] The gas pipeline located on the second passage of the gas source 19 is also connected in sequence with a real-time pressure regulating valve 11, a real-time pressure gauge 13, a flow valve 14 and a flow meter 15;

[0041] The real-time pressure regulating valve 11 and the flow valve 14 are responsible for accurately adjusting the air pressure and flow rate of the product to be tested 31 in real time;

[0042] The rear end of the test pressure regulating valve 10 is connected to a test pressure gauge 12;

[0043] The test pressure gauge 12 is connected to the test pressure regulating valve 10 to display its pressure. The real-time pressure gauge 13 and the flow meter 15 respectively display the pressure and flow through the real-time pressure regulating valve 11 and the flow valve 14, and the alarm interval can be set. If the pressure and flow are lower or higher than the set value, the corresponding alarm light 29 will light up and the device will stop working;

[0044] The operation panel 3, the test solenoid valve group 17, the cylinder solenoid valve 18, the pressure sensor 20 and the flow sensor 21 are respectively connected to the PLC 16;

[0045] The power supply is used to supply power to each power-consuming module.

[0046] The operating table 2 is also provided with an indicator light, a reset button 22, a power switch 23 and an emergency stop switch 24, and the indicator light, the reset button 22, the power switch 23 and the emergency stop switch 24 are respectively connected to corresponding ports on the PLC 16.

[0047] The power switch 23 is used to control the on and off of the power supply;

[0048] The emergency stop switch 24 is provided to enable emergency braking when an unexpected situation occurs during the use of the equipment;

[0049] By setting the reset button 22, the reset button 22 can be used to reset after troubleshooting;

[0050] By setting the indicator light, when testing the product 31 to be tested, the user can intuitively perceive whether the test result is qualified or unqualified.

[0051] Through the setting of the operation panel 3, the progress of the test and the status of the test device can be observed;

[0052] The indicator lights include a qualified indicator light 27, an unqualified indicator light 28 and an alarm light 29. When the product is determined to be qualified, the qualified indicator light 27 is on; when the product is determined to be unsuitable, the unqualified indicator light 28 and the alarm light 29 are on;

[0053] PLC16 is a programmable logic controller that uses a programmable memory to store instructions for performing logical operations, sequential control, timing, counting and arithmetic operations. It controls various types of mechanical equipment or production processes through digital or analog input and output, and records test information for staff to obtain.

[0054] The pressure sensor 20 detects pressure changes, measures the air pressure changes in the gas circuit in real time and converts them into electrical signals. The flow sensor 21 detects changes in the passing gas flow, measures the flow changes in the gas circuit in real time and converts them into electrical signals. The corresponding electrical signals are transmitted to PLC16 for comparison and judgment with preset data.

[0055] Embodiment 2

[0056] Based on the technical solution of embodiment 1, in order to prevent accidental injury during testing, a test button 25 is provided on both sides of the test base 7 on the operating table 2. The two test buttons 25 are respectively connected to the PLC 16. In actual application, both sides need to be pressed at the same time to start.

[0057] Embodiment 3

[0058] Based on the technical solution of embodiment one or two, in order to improve the air tightness of the two passages on the product to be tested 31, the test solenoid valve group 17 is a double-outlet linked solenoid valve, and the air inlet end of the double-outlet linked solenoid valve and the air outlet end of the test pressure regulating valve 10 are connected in sequence with a real-time pressure regulating valve 11, a real-time pressure gauge 13, a flow valve 14, a flow meter 15, a pressure sensor 20 and a flow sensor 21, and the two air outlets of the double-outlet linked solenoid valve are respectively connected to the two matching ports on the test port 6.

[0059] The two air outlets of the test solenoid valve group 17 are controlled in turn by the PLC 16, so that the two passages of the product to be tested 31 can be tested for air tightness respectively.

[0060] Embodiment 4

[0061] Based on the solution of the first embodiment, in order to facilitate sealing of the end of the product to be tested 31 , a clamping mechanism 26 is provided on the operating table 2 , and the clamping mechanism 26 is tightly clamped with the end of the product to be tested 31 .

[0062] Since the end of the product to be tested 31 is connected to a flexible tube, the clamping mechanism 26 includes an elastic clamping mechanism such as a spring clamp and a clamping seat.

[0063] Embodiment 5

[0064] Based on the technical solutions of embodiments one, two, three or four, in order to avoid damage to the module caused by heating up due to long-term operation of the equipment, a cooling fan 30 is arranged inside the body 1, and the fan is connected to a power supply to cool down the modules inside the body 1 when they are working for a long time.

[0065] Embodiment 6

[0066] Based on the technical solution of embodiment 1, 2, 3, 4 or 5, the detection method includes placing the product to be tested 31, starting the test, and reading the test result; specifically includes the following steps:

[0067] (1) Place the product to be tested 31 into the test base 7, with one end of the product to be tested 31 matched with the test port 6, and the other end of the product to be tested 31 closed by a closing clamp or other clamping mechanism 26;

[0068] (2) Start the test button 25, which transmits a signal to the PLC 16 controller. The PLC 16 controller first controls the cylinder solenoid valve 18 to open. After the gas source 19 passes through the intake pressure regulating valve 9, the test pressure regulating valve 10, and the cylinder solenoid valve 18, the gas is filled into the test cylinder 5 and the pressing cylinder 4. The piston ends of the pressing cylinder 4 and the test cylinder 5 extend, so that the pressing push rod 8 presses down and fixes the syringe adapter. At the same time, the test port 6 moves horizontally and seals with the two ports on the syringe adapter;

[0069] (3) After the two cylinders work stably, PLC16 controls the outlet port 1 of the test solenoid valve group 17 to open, and the gas source 19 fills the gas with the set pressure into the cavity of the product to be tested 31 through the inlet pressure regulating valve 9, the test pressure regulating valve 10, the pressure sensor 20, the flow sensor 21, the outlet port 1 of the test solenoid valve group 17 and the outlet port 1 of the test port 6. After the pressure and flow are stable, the flow sensor 21 starts to detect and display the flow through the air pipe at this time, and sends the signal to PLC16. PLC16 reads the real-time flow, compares the received flow with the pre-set test parameters, judges the test result, and then PLC16 controls the outlet port 1 of the test solenoid valve group 17 to close;

[0070] (4) As in step (3), PLC16 controls the air outlet 2 of the test solenoid valve group 17 to open, and judges the test result in accordance with the method consistent with step (3), and then PLC16 controls the air outlet 2 of the test solenoid valve group 17 and the cylinder solenoid valve 18 to close;

[0071] (5) According to the detection results of steps (3) and (4), PLC16 controls the corresponding indicator lights on the operation panel 3 and the operating table 2 to light up and display the final detection results.

[0072] In steps (3) and (4), the pressure and flow stability are determined by the inflation time, the stabilization time and the steady flow time.

[0073] Inflation time: It takes a certain amount of time to fill the product 31 to be tested with gas of a specified pressure;

[0074] Stabilization time: There is a system pressure drop in the detection device, and the detection device needs to be given some time to stabilize;

[0075] Steady flow time: whether there is flow leakage of gas in the product 31 to be tested during this time; if there is gas flow, the value displayed by the flow sensor 21 is not 0, indicating leakage;

[0076] How to determine the inflation time: Check the time when the pressure reaches the maximum value in the program;

[0077] Method for determining stabilization time: Determine the time required for pressure and flow to reach stability based on the curves of pressure and flow changing over time;

[0078] Method for determining the steady flow time: After the pressure and flow are stable, observe the change of flow with time. For the product 31 to be tested that does not have leakage problems, the flow will not exceed the qualified judgment value and is in a stable state. According to production needs, the designed steady flow time is selected.

[0079] According to the detection process of steps (3) and (4),

[0080] ① After the set process time, when the flow value collected by the flow sensor 21 exceeds the specified range, it is judged as a violation, and it needs to be judged twice. If there is a violation result in the two judgments, it is judged as unqualified, and the unqualified indicator light 28 and the alarm light 29 are on;

[0081] ② After the set process time, when the flow value collected by the flow sensor 21 is within the specified range, it is judged to be compliant. Two judgments are required. If both judgments are compliant, the product is judged to be qualified and the qualified indicator light 27 is on.

[0082] Through this technical solution,

[0083] 1. The present invention designs a simple and efficient airtightness testing device, which can be used for airtightness testing of a double-lumen tubular medical device, and provides a general method for determining process parameters, providing a detection guide for airtightness testing of double-lumen tubular medical devices.

[0084] 2. The detection equipment provided by the present invention is simple to manufacture, light in weight, and low in cost. It is also clearer and simpler for the staff to judge whether the double-lumen tubular medical device is qualified. It is applied in the detection of double-lumen tubular medical devices and has achieved good results. It optimizes the detection method, effectively improves the detection efficiency, the test parameter determination method is simple and reliable, and the test results are fast and reliable.

[0085] 3. In the inspection of tubular medical devices, the double-chamber of the present invention can detect the air tightness of one chamber alone, and can also detect whether there is communication between the two chambers, so as to analyze the leakage cause of unqualified products.

[0086] The above embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the utility model patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.

[0087] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An airtightness detection device for a double-lumen tubular medical device, Features: It includes a machine body, an operating table arranged on the machine body, an operating panel arranged on the operating table, a pressing cylinder, a test cylinder, a test port, a test base, a pressing ejector rod, an intake pressure regulating valve, a test pressure regulating valve, a real-time pressure regulating valve, a test pressure gauge, a real-time pressure gauge, a flow valve and a flow meter, and a PLC arranged in the machine body, a test solenoid valve group, a cylinder solenoid valve, a power supply, an air source, a pressure sensor and a flow sensor; The test base is installed on the horizontal surface of the operating table. A positioning groove matching the structure of the product to be tested is arranged on the test base. The pressing cylinder is installed on the operating table, and the piston end of the pressing cylinder is vertically downwardly arranged facing the test base. The pressing push rod is installed on the piston end of the pressing cylinder, and the pressing push rod matches the test base. The test cylinder is installed on the horizontal surface of the operating table, and the piston end of the test cylinder is arranged horizontally toward the test base. The test port is installed on the piston end of the test cylinder. Two matching ports are arranged on the test port. The test port matches the two ports on the syringe adapter to be tested. The gas source is divided into two paths for output, which respectively include First, after being connected with the intake pressure regulating valve, the test pressure regulating valve and the cylinder solenoid valve in sequence through the air pipeline, they are connected with the test cylinder and the pressing cylinder respectively; Second, the air pipeline is connected in sequence with the intake pressure regulating valve, the test pressure regulating valve, the pressure sensor, the flow sensor, the test solenoid valve group and the test port; The gas pipeline located on the gas source passage 2 is also connected in sequence with a real-time pressure regulating valve, a real-time pressure gauge, a flow valve and a flow meter; The rear end of the test pressure regulating valve is connected with a test pressure gauge; The operation panel, the test solenoid valve group, the cylinder solenoid valve, the pressure sensor and the flow sensor are respectively connected to the PLC; The power supply is used to supply power to each power-consuming module.

2. The air tightness detection device for a double-lumen tubular medical device according to claim 1, Features: The operating table is also provided with an indicator light, a reset button, a power switch and an emergency stop switch, and the indicator light, the reset button, the power switch and the emergency stop switch are respectively connected to corresponding ports on the PLC.

3. The air tightness detection device for a double-lumen tubular medical device according to claim 1, Features: A test button is respectively arranged on both sides of the test base on the operating table, and the two test buttons are respectively connected to the PLC.

4. The air tightness detection device for a double-lumen tubular medical device according to claim 3, Features: The test solenoid valve group is a double-outlet linked solenoid valve, and the air inlet end of the double-outlet linked solenoid valve and the air outlet end of the test pressure regulating valve are connected in sequence with a real-time pressure regulating valve, a real-time pressure gauge, a flow valve, a flow meter, a pressure sensor and a flow sensor, and the two air outlets of the double-outlet linked solenoid valve are respectively connected to the two matching ports on the test port.

5. The air tightness detection device for a double-lumen tubular medical device according to claim 1, Features: The operating table is provided with a clamping mechanism, which is tightly clamped with the end of the product to be tested.

6. The air tightness detection device for a double-lumen tubular medical device according to claim 2, Features: The indicator lights include a qualified indicator light, a failed indicator light and a warning light.

7. The air tightness detection device for a double-lumen tubular medical device according to claim 1, Features: A cooling fan is arranged inside the machine body.

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