CN114544095A - Accurate detection device and detection method for air tightness of medical easy-to-break plug - Google Patents
Accurate detection device and detection method for air tightness of medical easy-to-break plug Download PDFInfo
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- CN114544095A CN114544095A CN202210189972.4A CN202210189972A CN114544095A CN 114544095 A CN114544095 A CN 114544095A CN 202210189972 A CN202210189972 A CN 202210189972A CN 114544095 A CN114544095 A CN 114544095A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/06—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by observing bubbles in a liquid pool
- G01M3/08—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by observing bubbles in a liquid pool for pipes, cables or tubes; for pipe joints or seals; for valves; for welds
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/06—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by observing bubbles in a liquid pool
- G01M3/08—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by observing bubbles in a liquid pool for pipes, cables or tubes; for pipe joints or seals; for valves; for welds
- G01M3/085—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by observing bubbles in a liquid pool for pipes, cables or tubes; for pipe joints or seals; for valves; for welds for pipe joints or seals
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- Examining Or Testing Airtightness (AREA)
Abstract
The invention relates to a device and a method for accurately detecting the air tightness of a medical easily-broken plug. The device comprises a blowing unit, a positioning and sealing unit, a bubble display unit and a visual detection unit; the air blowing unit comprises an air blowing nozzle; the positioning sealing unit comprises an upper positioning plate, a middle isolating sealing gasket, a lower air guide plate and a capillary tube which are sequentially arranged from top to bottom, and the upper positioning plate, the middle isolating sealing gasket and the lower air guide plate are sequentially connected to form a hollow inner cavity; the lower end part of the lower air guide plate is hermetically connected with the connection part of the capillary tube; the bubble display unit comprises a test tube filled with a plurality of display liquids, and the other end of the capillary tube is inserted into the display liquids; the visual detection unit comprises a high-definition camera arranged on one side of the bubble display unit. The beneficial effects are as follows: the tiny air current that leaks the gas production with easily rolling over stopper turns into a small bubble, through the seizure of high definition camera to the small bubble to the form of image shows, makes and detects more accurately, and can not cause damage and secondary pollution to easily rolling over stopper.
Description
Technical Field
The invention relates to the technical field of airtightness detection of medical devices, in particular to a device and a method for accurately detecting airtightness of an easily broken plug for medical use.
Background
The easy-to-break plug/pipe is mainly used for packaging and sealing soft bag transfusion, blood transfusion and peritoneal dialysis solution and liquid conduction, the easy-to-break plug is used as a sealing part of the medicine and a connecting part of the medicine and the peritoneal dialysis solution drainage bag before the medicine is used, and when the medicine is used, the circulation of the liquid medicine can be realized only by breaking the easy-to-break plug.
A frangible plug/tube typically comprises a connecting portion and a break portion, wherein the break portion is a critical area of conduction, and is relatively structurally weak in order to facilitate easy breaking during use, thereby also increasing the risk of defects during manufacture: the broken part is easy to have the defects of cracks, openings, air holes and the like, the medical product with the defects can bring great medical safety hidden dangers, and therefore the air tightness of the easy-to-break plug/the easy-to-break pipe must be detected completely before delivery. The traditional detection method is that the whole easy-to-break plug/easy-to-break pipe is put into water manually, then gas is introduced into the easy-to-break plug/easy-to-break pipe and whether bubbles are generated is observed, but if the gas leakage is smaller, the detection result can be directly influenced because the tiny bubbles can not be seen by naked eyes or can not be observed easily, so the traditional detection method can not achieve the purpose of accurate detection, the efficiency is not high, the accuracy is not high, meanwhile, after the detection is finished, the wet easy-to-break plug/easy-to-break pipe needs to be dried, in the process, the easy-to-break plug/easy-to-break pipe can be polluted or damaged, the whole detection working process is complicated, the time consumption is long, the efficiency is low, and the damage rate is high.
Disclosure of Invention
In order to solve the defects of the prior art, the invention aims to provide a device and a method for accurately detecting the air tightness of a medical easy-to-break plug.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
an accurate detection device for the air tightness of a medical easy-to-break plug comprises an air blowing unit, a positioning sealing unit, an air bubble display unit and a visual detection unit;
the blowing unit comprises a blowing nozzle, and the blowing nozzle is used for introducing compressed gas into the easy-to-break plug;
the positioning sealing unit comprises an upper positioning plate, a middle isolation sealing gasket, a lower air guide plate and a capillary tube which are sequentially arranged from top to bottom, the upper positioning plate, the middle isolation sealing gasket and the lower air guide plate are connected and pressed tightly, air does not leak at the joint, the upper positioning plate, the middle isolation sealing gasket and the lower air guide plate are sequentially connected to form a hollow inner cavity, the hollow inner cavity can just accommodate an easily-folded plug, when the easily-folded plug is placed in the hollow inner cavity, the position where a connecting part of the easily-folded plug is combined with a breaking part is positioned between the middle isolation sealing gasket and one end of the capillary tube inserted into the through hole, and the part of the lower air guide plate of the hollow inner cavity is communicated with the capillary tube;
the lower end part of the lower air guide plate is hermetically connected with the connection part of the capillary tube;
the bubble display unit comprises a test tube filled with a plurality of display liquids, and the other end of the capillary tube is inserted into the display liquids in the test tube;
the visual detection unit comprises a high-definition camera arranged on one side of the bubble display unit, and a capillary opening at one end, inserted into the display liquid, of the capillary is positioned in the field of view of the high-definition camera.
Furthermore, the air blowing unit also comprises an air pressure regulating valve arranged at the air inlet end of the air blowing nozzle, and the air pressure regulating valve is connected with the air blowing nozzle through a hose.
Furthermore, the air blowing nozzle is a conical air blowing nozzle made of soft materials.
Further, the capillary tube and the lower air guide plate are integrally formed.
Furthermore, the capillary tube is connected with the lower air guide plate through a sealing plug, the capillary tube is inserted into an inner hole of the sealing plug, the outer wall of the sealing plug is inserted into the inner wall of the hollow inner cavity, and the capillary tube is connected with the lower air guide plate through the sealing plug in a sealing manner.
Further, the test tube is vertical to be set up and the mouth of pipe orientation the bottom of air guide plate down aims at the opening of the lower air guide plate portion of cavity inner chamber, be equipped with the display fluid in the test tube.
Further, the test tube and the capillary are arranged in the same central axis.
Further, the compressed gas is compressed air, and the pressure range is 0.05-0.5 MPa.
Further, the high-definition camera is a 2D area-array camera.
The invention also provides a detection method of the medical easy-to-break air tightness accurate detection device, which comprises the following steps:
s1, vertically placing the broken part of the easy-to-break plug to be detected downwards into a hollow inner cavity of a positioning and sealing unit of the detection device, ensuring that the easy-to-break plug is vertically placed and accurately positioned by an upper positioning plate, separating the connecting part of the easy-to-break plug and the broken part by a middle isolation sealing gasket, and positioning the connecting part of the easy-to-break plug and the broken part between the middle isolation sealing gasket and one end of a capillary tube inserted into the through hole;
s2, vertically aligning the blowing nozzle to the easy-to-break plug to be detected, and contacting and pressing the blowing nozzle with the inner edge of the opening of the connecting part of the easy-to-break plug without air leakage;
s3, opening the air pressure regulating valve to continuously introduce compressed air into the blowing nozzle, and regulating the air pressure to the required size through the air pressure regulating valve;
s4, continuously shooting the capillary mouth in the test tube by using a 2D area-array camera, and judging whether bubbles are generated through shot images, namely judging whether the detected easy plug leaks air.
In general, the above technical solutions contemplated by the present invention can achieve the following beneficial effects:
1. by arranging the bubble display unit, the micro air flow generated by easy-to-break air leakage is converted into a small bubble, and the micro air flow is amplified once, so that the small bubble is easy to capture by a high-definition camera;
2. the small bubbles are captured by the high-definition camera and displayed in the form of images, so that the small bubbles which are difficult to observe by naked eyes can be more easily seen, the observation and comparison of the bubbles are facilitated, and the detection is more accurate;
3. the gas and the display liquid used by the whole detection device can not cause damage and secondary pollution to the easy-to-break plug;
4. the device has the advantages of simple structure, easy realization, short detection time consumption and low cost, and particularly, the detection precision is high because small air leakage can be detected;
5. the detection device and the detection method greatly reduce the detection loss rate of the easy-to-break plug.
Drawings
FIG. 1 is a schematic structural diagram of an apparatus for accurately detecting the airtightness of a medical breakable stopper according to the present invention;
fig. 2 is a schematic view of a breakable plug.
Wherein: 1-air blowing nozzle, 2-easy-to-break plug, 21-connecting part, 22-break part, 3-upper positioning plate, 4-isolation sealing gasket, 5-lower air guide plate, 6-capillary tube, 7-test tube, 8-display liquid, 9-high definition camera, 10-air bubble, 11-sealing plug, 12-air pressure regulating valve, 13-hose and 14-test tube seat.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
As shown in fig. 1-2, the invention provides a medical device for accurately detecting the air tightness of an easily broken plug, which comprises an air blowing unit, a positioning and sealing unit, an air bubble display unit and a visual detection unit;
the blowing unit comprises a blowing nozzle, the blowing nozzle is used for introducing compressed gas into the easy-to-break plug, in order to adjust the air pressure of the compressed gas, an air pressure adjusting valve is arranged at the air inlet end of the blowing nozzle, the air pressure adjusting valve is connected with the blowing nozzle through a hose, in order to ensure the contact tightness between the blowing nozzle and the easy-to-break plug to be detected, the blowing nozzle is arranged to be a conical blowing nozzle made of soft materials, the conical blowing nozzle is compressed during use and is contacted and compressed with the inner edge of the opening of the connecting part of the easy-to-break plug to be detected, a sealing effect can be achieved under the action of stress, and the phenomenon of air leakage in the process of introducing the gas into the easy-to-break plug to be detected is avoided; the pressure range of the introduced compressed gas is 0.05-0.5 MPa. The pressure of the compressed gas introduced in this example was 0.275 MPa.
In another embodiment the pressure of the introduced compressed gas is 0.05 MPa.
In another embodiment the pressure of the introduced compressed gas is 0.5 MPa.
The positioning sealing unit comprises an upper positioning plate, a middle isolating sealing gasket, a lower air guide plate and a capillary tube which are sequentially arranged from top to bottom, the upper positioning plate, the middle isolating sealing gasket and the lower air guide plate are fixedly connected and pressed through threads, and joints among the three are not leaked. When the easy-to-break plug is placed in the hollow inner cavity, the middle isolation sealing gasket separates the connection part and the break part of the easy-to-break plug, and the connection part and the break part of the easy-to-break plug are combined between the middle isolation sealing gasket and one end of the capillary tube inserted into the through hole, so that when air leakage occurs at the break part of the easy-to-break plug, the air leakage flow can be guided to the lower air guide plate and enter the capillary tube, and the air leakage cannot occur from the direction of the upper positioning plate.
In another embodiment, the capillary tube is integrally formed with the lower air guide plate, and the portion of the lower air guide plate of the hollow interior of the lower air guide plate is in communication with the capillary tube.
Bubble display element is including the test tube that is equipped with a plurality of display fluids, and during the display fluid in the test tube was inserted to the other end of capillary, if air leakage takes place, can be in the display fluid bubble, for the operation of convenience of detecting and reduction detection cost, this embodiment selects water as the display fluid, rocks in order to prevent the test tube, places the test tube in the test-tube rack, the vertical setting of test tube and mouth of pipe orientation air guide plate's bottom down, aim at the opening of cavity's lower air guide plate portion, and the test tube sets up with the axis with the capillary, and the cover does not go into the aquatic in the test tube in the capillary end in the test tube, when the air current discharges from the capillary, the microbubble can appear in the capillary mouth of pipe, if do not have the air current to pass through then the bubble can not appear in the capillary mouth of pipe.
Visual detection unit is including setting up the high definition camera in bubble display element one side, the capillary mouth of pipe that the capillary inserted display liquid one end is in the visual field of high definition camera, in order to make things convenient for the high definition camera to gather the bubble in the display liquid, in order to gather more tiny bubble image, this embodiment adopts high resolution 2D area array camera to carry out image shooting to bubble display element in the testing process, the image of shooing is equivalent to and has carried out enlargeing once more to tiny bubble, through the change of observing bubble in the image of shooing, if there is the bubble, then it appears leaking gas to show the easy stopper of rolling over, if there is not the bubble, then it is intact to judge the easy stopper of rolling over.
Meanwhile, a detection method of the medical easy-to-break air tightness accurate detection device is also provided, and the detection method comprises the following steps:
s1, vertically placing the broken part of the easy-to-break plug to be detected downwards into a hollow inner cavity of a positioning and sealing unit of the detection device, ensuring that the easy-to-break plug is vertically placed and accurately positioned by an upper positioning plate, separating the connecting part of the easy-to-break plug and the broken part by a middle isolation sealing gasket, and positioning the connecting part of the easy-to-break plug and the broken part between the middle isolation sealing gasket and one end of a capillary tube inserted into the through hole;
s2, vertically aligning the conical blowing nozzle to the easy-to-break plug to be detected, and contacting and pressing the conical surface with the inner diameter line of the easy-to-break plug to ensure the sealing property between the conical blowing nozzle and the easy-to-break plug;
s3, opening an air pressure regulating valve to continuously introduce compressed air into the conical air blowing nozzle, regulating the air pressure to a required size through the air pressure regulating valve, if the easy-to-break part leaks air, transmitting the air to water at the lower part through a lower air guide plate and a capillary tube of a bubble display unit, generating bubbles near the mouth of the capillary tube in the water, namely amplifying the air flow once at the moment, and changing a small air flow into a small bubble;
s4, continuously shooting the capillary tube opening in the test tube by using a 2D area-array camera (the size range of the bubbles which can be collected can reach micron order), observing and comparing whether the bubbles are generated in the shot image, if the bubbles exist, representing that the easy-to-break plug leaks air, and if the bubbles do not exist, representing that the easy-to-break plug does not leak air, and judging whether the detected easy-to-break plug leaks air.
In summary, the device and the method for accurately detecting the air tightness of the medical easily-broken plug can accurately detect the air tightness of the easily-broken plug, cannot cause damage and secondary pollution to products, reduce detection cost and detection loss rate, improve detection efficiency and have strong practicability.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. The utility model provides a medical treatment is with accurate detection device of easy stopper gas tightness which characterized in that: the device comprises a blowing unit, a positioning and sealing unit, a bubble display unit and a visual detection unit;
the blowing unit comprises a blowing nozzle, and the blowing nozzle is used for introducing compressed gas into the easy-to-break plug;
the positioning sealing unit comprises an upper positioning plate, a middle isolating sealing gasket, a lower air guide plate and a capillary tube which are sequentially arranged from top to bottom, the upper positioning plate, the middle isolating sealing gasket and the lower air guide plate are connected and pressed tightly, the joint is airtight, the upper positioning plate, the middle isolating sealing gasket and the lower air guide plate are sequentially connected to form a hollow inner cavity, the hollow inner cavity can just contain an easily-folded plug, when the easily-folded plug is placed in the hollow inner cavity, the position where a connecting part of the easily-folded plug is combined with a breaking part is located between the middle isolating sealing gasket and one end of the capillary tube inserted into the through hole, and the part of the lower air guide plate of the hollow inner cavity is communicated with the capillary tube;
the lower end part of the lower air guide plate is hermetically connected with the connection part of the capillary tube;
the bubble display unit comprises a test tube filled with a plurality of display liquids, and the other end of the capillary tube is inserted into the display liquids in the test tube;
the visual detection unit comprises a high-definition camera arranged on one side of the bubble display unit, and a capillary opening at one end, inserted into the display liquid, of the capillary is positioned in the field of view of the high-definition camera.
2. The device for accurately detecting the air tightness of the medical breakable plug according to claim 1, wherein: the air blowing unit further comprises an air pressure adjusting valve arranged at the air inlet end of the air blowing nozzle, and the air pressure adjusting valve is connected with the air blowing nozzle through a hose.
3. The device for accurately detecting the air tightness of the medical breakable plug according to claim 1, wherein: the air blowing nozzle is a conical air blowing nozzle made of soft materials.
4. The device for accurately detecting the air tightness of the medical breakable plug according to claim 1, wherein: the capillary tube and the lower air guide plate are integrally formed.
5. The device for accurately detecting the air tightness of the medical breakable plug according to claim 1, wherein: the capillary tube is connected with the lower air guide plate through a sealing plug, the capillary tube is inserted into an inner hole of the sealing plug, the outer wall of the sealing plug is inserted into the inner wall of the hollow inner cavity, and the capillary tube is connected with the lower air guide plate through the sealing plug in a sealing manner.
6. The device for accurately detecting the airtightness of the medical breakable stopper according to claim 1, wherein: the test tube is vertically arranged, the tube opening faces the bottom of the lower air guide plate and is aligned to the opening of the lower air guide plate part of the hollow inner cavity, and display liquid is filled in the test tube.
7. The device for accurately detecting the air tightness of the medical breakable plug according to claim 1, wherein: the test tube and the capillary tube are arranged on the same axis.
8. The device for accurately detecting the air tightness of the medical breakable plug according to claim 1, wherein: the compressed gas is compressed air, and the pressure range is 0.05-0.5 MPa.
9. The device for accurately detecting the air tightness of the medical breakable plug according to claim 1, wherein: the high-definition camera is a 2D area-array camera.
10. The detection method of the medical breakable stopper airtightness precise detection device according to any one of claims 1 to 9, characterized by comprising the following steps:
s1, vertically placing the broken part of the easy-to-break plug to be detected downwards into a hollow inner cavity of a positioning and sealing unit of the detection device, ensuring that the easy-to-break plug is vertically placed and accurately positioned by an upper positioning plate, separating the connecting part of the easy-to-break plug and the broken part by a middle isolation sealing gasket, and positioning the connecting part of the easy-to-break plug and the broken part between the middle isolation sealing gasket and one end of a capillary tube inserted into the through hole;
s2, vertically aligning the blowing nozzle to the easy-to-break plug to be detected, and contacting and pressing the blowing nozzle with the inner edge of the opening of the connecting part of the easy-to-break plug without air leakage;
s3, opening the air pressure regulating valve to continuously introduce compressed air into the blowing nozzle, and regulating the air pressure to the required size through the air pressure regulating valve;
s4, continuously shooting the capillary mouth in the test tube by using a 2D area-array camera, and judging whether bubbles are generated in the display liquid through the shot images, so that whether the detected easy plug leaks air can be judged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210189972.4A CN114544095A (en) | 2022-02-28 | 2022-02-28 | Accurate detection device and detection method for air tightness of medical easy-to-break plug |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210189972.4A CN114544095A (en) | 2022-02-28 | 2022-02-28 | Accurate detection device and detection method for air tightness of medical easy-to-break plug |
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| Publication Number | Publication Date |
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| CN114544095A true CN114544095A (en) | 2022-05-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210189972.4A Pending CN114544095A (en) | 2022-02-28 | 2022-02-28 | Accurate detection device and detection method for air tightness of medical easy-to-break plug |
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| CN (1) | CN114544095A (en) |
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- 2022-02-28 CN CN202210189972.4A patent/CN114544095A/en active Pending
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