Positive pressure sealing performance test device and method for syringe

A technology of test device and test method, applied in liquid/vacuum measurement for liquid tightness, by detecting the appearance of fluid at the leak point, etc., which can solve the problem of liquid leakage, cannot provide continuous and stable lateral force, and cannot test syringes Sealing performance and other issues, to achieve the effect of fewer operation steps

CN108444646APending Publication Date: 2018-08-24上海市医疗器械检测所
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2018-08-24

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Abstract

The invention discloses a positive pressure sealing performance test device and method for a syringe. The detection device comprises a first support frame, a second support frame, a telescopic rod, and a weight frame, wherein the upper end of the first support frame is provided with a first mounting part for mounting a syringe; the second support frame is located at one side of the first support frame, and the upper end of the second support frame is provided with a second mounting part; the telescopic rod is located on the second mounting part of the second support frame, the output end of the telescopic rod faces the first support frame, and the output of the telescopic rod is used for providing an axial force for a core rod of the syringe on the first support frame; the weight frame comprises a hook and a weight carrying tray, the hook is detachably connected to the core rod of the syringe, the weight carrying tray is used to carry a weight, and the weight on the weight carrying tray is used to provide a lateral force for the core rod of the syringe. The positive pressure sealing performance test device for the syringe disclosed by the invention can effectively detect the sealing performance of the syringe when the syringe is subjected to the axial force and the lateral force at the same time, and the detection method is simple and easy to operate.
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Description

technical field

[0001] The invention relates to the technical field of structural design of a syringe performance testing device, in particular to a positive pressure sealing performance testing device and method for a syringe. Background technique

[0002] The existing tightness test is generally a test of the liquid leakage of the syringe under the condition of axial force, but in reality, the syringe may also be subjected to lateral force, if the sealing performance of the syringe can only meet its In the case of axial force, when it is subjected to lateral force, liquid leakage will still occur at the piston or sealing ring of the syringe, and the existing detection device cannot test the syringe when it is subjected to axial force and lateral force at the same time. The sealing performance of the syringe.

[0003] According to national standards, existing syringes need to be tested for their tightness. The existing test for the tightness of syringes subjected to positi...

Examples

specific Embodiment 2

[0054] This specific embodiment discloses a positive pressure tightness test method for a syringe, the method adopts the positive pressure tightness test device for a syringe disclosed in the first embodiment, including the steps:

[0055] S10: Inject water larger than the nominal volume into the syringe;

[0056] S20: Press the plunger of the syringe to discharge the air in the syringe, adjust the water volume in the syringe to its nominal capacity or to a position less than or equal to its nominal capacity, and seal the cone of the syringe;

[0057] S30: placing the syringe flat on the first installation part on the first support frame;

[0058] S40: hang a weight frame on the end of the core rod of the syringe, gradually add weights on the weight frame according to preset standards, and the weight exerts a lateral force on the core rod of the syringe through its own gravity;

[0059] S50: When the core rod is subjected to the lateral force exerted by the weight, check whet...