Testing device for pressurized air bag

Abstract

The utility model belongs to the technical field of quality detection, and relates to a testing device for a pressurized air bag, which comprises a testing host with a built-in inflating pump, adapters simultaneously connected with a plurality of groups of inflating pipes, and a first air inlet pipe connected with the testing host and the adapters, and the first air inlet pipe is communicated with the inflating pipes and a bag cavity. A plurality of groups of mutually independent inflation pipelines are formed, and the inflation pump inflates and pressurizes the inflation pipelines. The beneficial effects of the utility model are that a plurality of mutually independent inflation pipelines are arranged, air tightness, pressure resistance and fatigue tests are carried out by controlling the opening or closing of the inflation pipelines, the physical environment of the air bag in use can be simulated and tested more effectively, the reliability and accuracy of the test result are ensured, and the use safety of a patient is further ensured. And inflation and deflation do not share the same pipeline any more, so that the technical problem of pressure relief during compatibility is avoided, and the test result is more accurate.

Description

TECHNICAL FIELD

[0001] The utility model belongs to quality detection technical field, especially is involved in a kind of testing device for pressurized air bag. BACKGROUND

[0002] In the medical field, in order to achieve better therapeutic effect, often need to set pressurized air bag on patient's limbs, and through regular inflation, deflation and pressurization to the soft tissue of limbs, not only can play better hemostatic effect, also can promote interstitial fluid between limb tissue centripetal reflux through vein and lymphatic vessel, achieve to accelerate limb blood circulation, eliminate the purpose of local edema of limb, to realize better therapeutic effect.Therefore, the quality of pressurized air bag is important matter concerning life safety.

[0003] This kind of limb pressurized air bag based on treatment purpose and design production, need to frequently inflate and deflate in actual use, therefore need to test the air tightness, pressure resistance and fatigue performance of air bag, to ensure safe use, for this need a kind of testing device for pressurized air bag, to ensure the life safety of patient. UTILITY MODEL CONTENT

[0004] The utility model solves the problem to provide a kind of testing device for pressurized air bag, can effectively simulate the physical environment when air bag is used, guarantee that the test result of air tightness, pressure resistance and fatigue performance is true, accurate, safeguards patient safe use.

[0005] To solve the above technical problem, the technical scheme adopted by the utility model is: a kind of testing device for pressurized air bag, can be connected to be measured air bag, the air bag to be measured includes at least one group of closed air chamber and the inflation pipe that is communicated with the air chamber and extends to the outside of the capsule main body being provided with the capsule main body, it is characterized by: including built-in inflation pump test host, while being connected with multiple groups of the inflation pipe adapter and the first air inlet pipe of the test host and the adapter, the first air inlet pipe is communicated with the inflation pipe and the air chamber, forms multiple groups of independent inflation pipe line, the inflation pump is inflated and pressurized for the inflation pipe line.

[0006] Further, the number of the first air inlet pipe is greater than or equal to the number of the inflation pipe, a group of the air chamber, a group of the inflation pipe and a group of the first air inlet pipe form a group of the inflation pipe line.

[0007] Further, the electromagnetic valve for opening or closing the inflation pipe line where it is located is arranged on the first air inlet pipe and electrically connected with the test host.

[0008] Further, multiple groups of connector sockets are arranged in parallel on the adapter, each group of the connector socket is connected with a group of the first air inlet pipe and a group of the inflation pipe respectively, to form a group of the inflation pipe line.

[0009] Further, the inflation pipe is provided with a one-way control valve.

[0010] Further, the cavity is connected with a pressure relief valve on the capsule body through an exhaust pipe respectively.

[0011] Further, a pressure sensor is arranged in the cavity, and the pressure sensor is electrically connected with a test host, and the test host controls opening or closing of the inflation pipeline, so that a pressure value P1 measured by the pressure sensor satisfies a preset condition.

[0012] Further, the preset condition includes an air tightness test, that is, when the pressure value P1 is a nominal value P of the air bag to be tested, the inflation is continued to a second pressure value P2, so that a pressure drop value P2-P1 in 1 minute is less than 0.1P.

[0013] Further, the preset condition further includes a pressure resistance test, and the inflation pipeline is opened to inflate, so that the pressure value P1 is 1.5 times of the nominal value, and the inflation is continued for 1 minute.

[0014] Further, the preset condition further includes a fatigue test, that is, the inflation and deflation are repeated for at least 50,000 times, and then the air tightness test is performed until a requirement is met.

[0015] By adopting the above technical scheme, a plurality of independent inflation pipelines are arranged, the opening or closing of the inflation pipeline is controlled, and the air tightness test, the pressure resistance test and the fatigue test are sequentially performed, so that the physical environment of the air bag during use can be more effectively simulated, the reliability and accuracy of the test result are ensured, and then the use safety of the patient is ensured. Secondly, the inflation and deflation no longer share the same pipeline, and the technical problem of pressure relief during compatibility is avoided, so that the test result is more accurate. In addition, the data statistics and analysis are tested and recorded, and more effective technical guidance can be provided for the manufacturer to improve the performance of the air bag. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical scheme in the embodiments of the present application, the drawings needed in the description of the embodiments of the present application will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the contents of the embodiments of the present application and the drawings.

[0017] Figure 1 is a structural schematic diagram of the embodiments provided by the present application.

[0018] The marks in the figure are as follows:

[0019] 11. Cyst cavity; 12. Cyst-shaped main body; 13. Inflation tube; 2. Test host; 3. Adapter; 31. Connector; 4. First air inlet pipe; 5. Solenoid valve; 6. Exhaust pipe; 7. Pressure relief valve. Detailed Implementation

[0020] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only partial structures relevant to the present invention, not the complete structure.

[0021] In this embodiment, the airbag to be tested has four sets of cavities 11, each cavity 11 is connected to an inflation tube, and there are four sets of independent inflation tubes in total. Of course, the number of cavities 11 is not specifically limited.

[0022] like Figure 1 As shown, a testing device for a pressurized airbag can be connected to an airbag under test. The airbag includes a sac-shaped body 12 with at least one set of sealed cavities 11 and an inflation tube 13 that communicates with the cavities 11 and extends to the outside of the sac-shaped body 12. The device includes a testing host 2 with a built-in inflation pump, an adapter 3 that connects to multiple sets of inflation tubes 13, and a first air inlet pipe 4 connecting the testing host 2 and the adapter 3. The first air inlet pipe 4 connects the inflation tubes 13 and the cavities 11, forming multiple independent inflation lines. The inflation pump inflates and pressurizes the inflation lines. Each inflation line is tested separately, making the test results more accurate, strictly ensuring product quality, and thus guaranteeing patient safety.

[0023] Here, each cyst cavity 11 can be inflated and deflated individually, or some or all of the cyst cavities 11 can be inflated and deflated without any specific limitations.

[0024] Preferably, the number of first air inlet tubes 4 is greater than or equal to the number of inflation tubes 13, and a set of bladder 11, a set of inflation tubes 13, and a set of first air inlet tubes 4 form a set of inflation tubing. In this embodiment, there are a total of four sets of inflation tubing, which can be tested simultaneously or separately, resulting in more accurate measurement results.

[0025] Preferably, the first air inlet pipe 4 is equipped with a solenoid valve 5 electrically connected to the test host 2, used to open or close the inflation line it is located in. By opening and closing the solenoid valve 5, the opening or closing of each inflation line can be achieved, making the test more accurate.

[0026] Preferably, multiple sets of connectors 31 are connected in parallel on the adapter 3, and each set of connectors 31 is connected to a first air inlet pipe 4 and an inflation pipe 13 respectively, forming an inflation pipeline.

[0027] Preferably, the inflation pipe 13 is equipped with a one-way control valve.

[0028] Preferably, the bladder cavity 11 is connected to the pressure relief valve 7 on the bladder body 12 through the exhaust pipe 6 to achieve a better pressure relief effect. While the pressure relief is faster, there is less residual gas in the exhaust pipe. Using this technical solution, inflation and deflation no longer share the same pipeline, which solves the pressure relief problem when inflation and deflation are compatible and achieves better test results.

[0029] Preferably, the pressure relief valve 7 is electrically connected to the test host 2.

[0030] Preferably, a pressure sensor is provided inside the cavity 11, and the pressure sensor is electrically connected to the test host 2.

[0031] The method using the testing apparatus for inflatable airbags as described above includes the following steps:

[0032] The bladder cavity 11 and the adapter 3 are connected by the inflation tube 13, and the adapter 3 is connected to the first air inlet tube 4, thus connecting the first air inlet tube 4, the inflation tube 13 and the bladder cavity 11 to form multiple sets of independent inflation lines.

[0033] The test host 2 controls the opening or closing of the inflation line so that the pressure value P1 measured by the pressure sensor meets the preset conditions.

[0034] Preferably, the preset conditions include an airtightness test, that is, when the pressure value P1 is the nominal value P of the airbag under test, inflation continues to the second pressure value P2, so that the pressure drop value within 1 minute is... The pressure drop value here is a quantitative indicator of the pressure difference or pressure loss of the airbag under test during the inflation and deflation process. It can reflect the airtightness of the airbag under test and better ensure its safety during use.

[0035] The nominal value here is the pressure value marked by the manufacturer according to the national standard series when the airbag leaves the factory. The actual measured value and the nominal value may have a certain deviation.

[0036] Preferably, the preset conditions also include a pressure resistance test, inflating the air supply line to make P1 1.5 times the nominal value and maintaining this pressure for 1 minute. During the pressure resistance test, the pressure value P1 in the bladder cavity 11 needs to be monitored in real time, and air needs to be continuously added to ensure that the pressure value P1 is 1.5 times the standard value and maintained for 1 minute without explosion or damage, and the product meets the requirements.

[0037] Preferably, the preset conditions also include fatigue testing, repeated inflation and deflation at least 50,000 times, followed by an airtightness test until the requirements are met. During the fatigue test, the control unit 2 turns on the inflation pump to inflate and pressurize all inflation lines. When the pressure value P1 is 1.5 times the nominal value, the pressure relief valve 7 is opened to release the air. When the pressure value P1 is less than 10% of the nominal value, the pressure relief valve 7 is closed, and the solenoid valve 5 is opened to continue inflation. This cycle is repeated. The fatigue test combined with the airtightness test can effectively simulate the physical environment when the airbag is in use, ensuring the authenticity and accuracy of the test results and guaranteeing patient safety.

[0038] In this embodiment, the inflation pressure of the test host 2 is set within the range of 5 to 60 kPa, the ambient temperature is 10°C to 30°C, the relative humidity is not greater than 80%, the atmospheric pressure is 700 hPa to 1060 hPa, and the power supply is ~220V, 50Hz.

[0039] The beneficial effects of this invention are as follows: By setting up multiple independent inflation lines and controlling the opening and closing of these lines, airtightness, pressure resistance, and fatigue tests can be performed sequentially. This more effectively simulates the physical environment of the airbag during use, ensuring reliable and accurate test results and thus guaranteeing patient safety. Secondly, inflation and deflation no longer share the same line, avoiding the technical problems of pressure leakage during compatibility testing and making the test results more accurate. Furthermore, the testing, recording, statistical analysis, and statistical processing of data can provide manufacturers with more effective technical guidance for improving airbag performance.

[0040] The embodiments of this utility model have been described in detail above, but the content described is only a preferred embodiment of this utility model and should not be considered as limiting the scope of implementation of this utility model. All equivalent changes and improvements made in accordance with the claims of this utility model should still fall within the patent coverage of this utility model.

Claims

1. A testing device for a pressurized airbag, connectable to an airbag to be tested, the airbag comprising a sac-like body having at least one set of sealed cavities and an inflation tube communicating with the cavities and extending to the outside of the sac-like body, characterized in that: The device includes a test host with a built-in air pump, an adapter that connects to multiple sets of the air tubes, and a first air inlet pipe that connects the test host and the adapter. The first air inlet pipe connects the air tubes and the bladder cavity to form multiple sets of independent air lines. The air pump inflates and pressurizes the air lines.

2. The testing device for a pressurized airbag according to claim 1, characterized in that: The number of first air inlets is greater than or equal to the number of inflation tubes, and a set of the bladder cavities, a set of inflation tubes and a set of first air inlets form a set of inflation tubing.

3. The testing device for a pressurized airbag according to claim 2, characterized in that: The first air inlet pipe is equipped with a solenoid valve electrically connected to the test host, which is used to open or close the air filling pipeline in which it is located.

4. The testing device for a pressurized airbag according to claim 3, characterized in that: The adapter is provided with multiple sets of connectors in parallel. Each set of connectors is connected to a set of the first air inlet pipes and a set of the inflation pipes, forming a set of inflation pipelines.

5. The testing device for a pressurized airbag according to claim 3 or 4, characterized in that: The inflation tube is equipped with a one-way control valve.

6. The testing device for a pressurized airbag according to claim 5, characterized in that: The cavities are connected to pressure relief valves on the cystic body via exhaust pipes.

7. The testing device for a pressurized airbag according to claim 6, characterized in that: A pressure sensor is installed inside the bladder cavity. The pressure sensor is electrically connected to the test host. The test host controls the opening or closing of the inflation line so that the pressure value P1 measured by the pressure sensor meets a preset condition.

8. The testing device for a pressurized airbag according to claim 7, characterized in that: The preset conditions include an airtightness test, which involves continuing to inflate the airbag to a second pressure value P2 when the pressure value P1 is the nominal value P of the airbag under test, so that the pressure drop value within 1 minute is...

9. The testing device for a pressurized airbag according to claim 8, characterized in that: The preset conditions also include a pressure resistance test, in which the inflation line is opened to inflate the pressure value P1 to 1.5 times the nominal value and this is maintained for 1 minute.

10. The testing apparatus for a pressurized airbag according to claim 8 or 9, characterized in that: The preset conditions also include a fatigue test, which involves repeatedly inflating and deflating the air at least 50,000 times, followed by the airtightness test, until the requirements are met.

Images