Quality inspection equipment for medical equipment processing
By simulating the fluid properties of blood through a mixing impeller, conducting high-pressure testing of the floating measurement component, and inspecting the speed measurement component, the accuracy issues of testing the sealing and sterility of blood circuit quick connectors are resolved. The blood rheological properties are dynamically simulated, the risk of coagulation is prevented, and the reliability of the test results is ensured.
Patent Information
- Application Number
- CN202510904343.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-01
- Publication Date
- 2025-09-26
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
The sealing and sterility testing of blood circuit quick connectors in the existing technology is not accurate enough and difficult to detect. It cannot effectively simulate the rheological properties of blood and there is a risk of coagulation and bacterial culture medium.
A mixing impeller and uniform component are used to generate vortexes to simulate the fluid properties of blood; the flotation component creates a high-pressure environment for sterility performance testing; and the speed measurement component detects changes in flow resistance to eliminate the influence of pipe diameter variables.
It achieves accurate testing of the sealing and sterility of blood line quick connectors, dynamically simulates blood rheological properties, prevents coagulation accidents, and ensures the accuracy of sterility and flow resistance testing.
Smart Images
Figure CN120702701A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of blood circuit quick connector detection, and in particular to quality inspection equipment for medical equipment processing. Background Art
[0002] Blood circuit quick connectors are used in extracorporeal circulation circuits such as hemodialysis, hemofiltration, and plasma exchange to connect dialyzers, filters, blood circuit tubes, puncture needles or central venous catheters to transport blood and anticoagulants.
[0003] During the production process of blood line quick connectors, a sealing test is usually required. Currently, the sealing test of blood line quick connectors is similar to that of other medical quick connectors, and water or gas is often used as a carrier for sealing test. However, blood is a non-Newtonian liquid with a complex suspension, and its viscosity decreases with increasing flow rate, while conventional aqueous solutions or gases do not have this property. If blood is retained in the quick connector, it will increase the risk of coagulation in patients, resulting in a certain difference between the sealing test of the blood line quick connector and actual use, making the test results inaccurate. In addition, blood is an excellent culture medium for bacteria and viruses. Therefore, the blood line quick connector needs to be sterilized after docking. It is more troublesome and difficult to test the sterility of the blood line quick connector. Based on this, a quality inspection equipment for medical device processing is proposed. Summary of the Invention
[0004] The purpose of the present invention is to solve the problems in the prior art and to propose a quality inspection device for medical device processing.
[0005] In order to achieve the above object, the present invention adopts the following technical solutions: A quality inspection device for medical device processing, comprising a test bench for quality inspection of blood line quick connectors and two movable seats. The top of the movable seat on the left side is connected to two liquid distribution chambers via a liquid mixing chamber. The liquid mixing chamber and the two liquid distribution chambers are interconnected via a three-way valve. The bottom end of the three-way valve is connected to a mixing impeller for mixing simulated liquids via a straight pipe. A uniform component is provided below the mixing impeller. The top of the movable seat on the right side is connected to a receiving chamber, the mixed liquid chamber is connected to a docking joint through an input pipeline, and the receiving chamber is connected to a docking joint through an output pipeline. The outer walls of the two docking joints are connected to sealing components, and a bacteria culture chamber is provided outside the sealing component located on the side of the input pipeline. The upper side wall of the output pipeline is connected to a test cylinder, and a flotation detection component for testing whether there are bubbles in the output pipeline is provided in the test cylinder. The input pipeline and the output pipeline are both connected to test rings, and the test rings are connected to multiple transducer impellers through multiple sealing arc plates arranged in an array. The transducer impeller is connected to a speed measuring component through a pin shaft. The speed measuring component on the left is connected to a corresponding photoelectric sensor, and the speed measuring component on the right is connected to multiple sensing plates.
[0006] Preferably, two sets of symmetrically arranged guide rails are fixedly connected to the top of the test bench, the guide rails are slidably connected to the movable seat, the blood circuit quick connector consists of a male end connector and a female end connector, and a cover is fixedly assembled on the top of the test bench.
[0007] Preferably, both ends of the three-way valve are connected to two liquid distribution chambers through connecting pipes, and the two liquid distribution chambers are respectively filled with water and glycerin. The bottom end of the three-way valve is fixedly connected to a fixing frame through a straight pipe, and the top end of the fixing frame is rotatably connected to the mixing impeller.
[0008] Preferably, the uniform component includes a high-pressure chamber and a mixing hose, the straight pipe is connected to the mixed liquid chamber through the mixing hose, the outer wall of the mixing hose is connected with a sponge ring, the mixing hose is fixedly connected to the inner wall of the high-pressure chamber, the top of the mixed liquid chamber is fixedly connected with a storage chamber for storing xanthan gum solution, the storage chamber is connected to the high-pressure chamber through a horizontal tube, and a plurality of penetration micropores are opened on the side wall of the mixing hose.
[0009] Preferably, the liquid mixing chamber is connected to the input pipeline through a control valve, and the receiving chamber is connected to the output pipeline through a control valve.
[0010] Preferably, the sealing assembly consists of a sealing bucket and an annular sealing strip, the docking head is fixedly connected to the annular sealing strip through the sealing bucket, the sealing bucket on the left is connected to the regulating valve of the culture chamber, and the outer side wall of the sealing bucket on the right is connected to a micro air pump for adjusting the air pressure inside the sealing bucket.
[0011] Preferably, the float detection assembly includes a float block arranged at the bottom of the test cylinder, the top of the float block is fixedly connected to a push rod, the push rod is slidably connected to the inner wall of the test cylinder through a fixing ring, the outer wall of the push rod is sleeved with an adjustment spring arranged between the float block and the fixing ring, and the top of the test cylinder is fixedly connected to a pressure sensor for testing the pressure at the top of the push rod.
[0012] Preferably, the speed measuring assembly includes a speed measuring rotary plate fixed on the pin shaft of the energy conversion impeller, and a plurality of arc grooves are arrayed on the test ring, and the arc grooves are fixedly connected to the sealing arc plate, and the sealing arc plate is rotationally connected to the energy conversion impeller and the speed measuring rotary plate respectively through the pin shaft.
[0013] Preferably, the side wall of the speed measuring turntable is fixedly connected to a speed measuring plate, the outer side wall of the sealing arc plate is fixedly connected to a speed measuring laser sensor, the speed measuring turntable on the left is fixedly connected to the corresponding photoelectric sensor through a synchronization rod, and the speed measuring turntable on the right is fixedly connected to a plurality of sensing plates arranged in a circular array through a synchronization rod.
[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. This solution uses the uniform component and the mixing impeller to generate vortexes, causing the mixing hose to deform and squeeze the sponge ring, achieving microporous penetration of xanthan gum and real-time configuration of a simulated liquid with fluid properties close to those of blood. This solves the problem that traditional simulated liquids cannot dynamically restore the rheological properties of blood, resulting in a disconnect between test results and clinical practice.
[0015] 2. This solution, through the installation of a floating detection component, can create a clinical-grade multi-bacteria high-pressure environment, directly test the microbial barrier capability of blood line quick connectors under extreme conditions, and achieve simultaneous dynamic pressure testing of sterility performance and quantitative leak detection.
[0016] 3. Through the setting of the speed measurement component, this solution can use the front-to-back comparison of the input and output pipelines to measure the speed, eliminate the pipe diameter variable, and focus on detecting the flow resistance of the blood circuit quick connector. It can detect whether the viscosity change when simulating the liquid speed change will cause stagnation in the chamber of the blood circuit quick connector, and provide early warning of the dead zone design defects of the connector, thus preventing clinical coagulation accidents from the source. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 This is a schematic diagram of the three-dimensional structure of a quality inspection device for medical device processing proposed by the present invention; Figure 2 This is a structural schematic diagram of a test bench in a quality inspection device for medical device processing proposed by the present invention; Figure 3 This is an assembly diagram of a quality inspection device for medical device processing proposed by the present invention; Figure 4 for Figure 3 Enlarged view of point A in the middle; Figure 5 This is a structural schematic diagram of the position of a three-way valve in a quality inspection device for medical device processing proposed by the present invention; Figure 6 This is a schematic structural diagram of a uniform component in a quality inspection device for medical device processing proposed by the present invention; Figure 7 This is a structural diagram of the input pipeline in a quality inspection device for medical device processing proposed by the present invention; Figure 8 This is a schematic structural diagram of a speed measuring component on an input pipeline in a quality inspection device for medical device processing proposed by the present invention; Figure 9 This is a schematic structural diagram of the output pipeline in a quality inspection device for medical device processing proposed by the present invention; Figure 10 This is a schematic structural diagram of a speed measuring component on an output pipeline in a quality inspection device for medical device processing proposed by the present invention; Figure 11This is a structural diagram of the positions of the through-beam photoelectric sensor and the sensing plate in a quality inspection device for medical device processing proposed by the present invention; Figure 12 This is a structural schematic diagram of a floating detection component in a quality inspection device for medical device processing proposed by the present invention.
[0018] In the figure: 1. Test bench; 2. Moving seat; 3. Blood line quick connector; 4. Guide rail; 5. Mixing chamber; 6. Liquid distribution chamber; 7. Three-way valve; 8. Mixing impeller; 9. Storage chamber; 10. High-pressure chamber; 11. Sponge ring; 12. Mixing hose; 13. Input pipeline; 14. Sealing bucket; 15. Ring sealing strip; 16. Bacteria culture chamber; 17. Output pipeline; 18. Micro air pump; 19. Receiving chamber; 20. Test cylinder; 21. Float; 22. Adjustment spring; 23. Pressure sensor; 24. Test ring; 25. Sealing arc plate; 26. Transducer impeller; 27. Speed measuring plate; 28. Speed measuring plate; 29. Speed measuring laser sensor; 30. Through-beam photoelectric sensor; 31. Induction plate. DETAILED DESCRIPTION
[0019] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.
[0020] In the description of the present invention, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0021] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "mounted / connected," and "connected" should be understood in a broad sense. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in the present invention in specific circumstances.
[0022] Example, see Figures 1 to 12A quality inspection device for medical device processing includes a test bench 1 for quality inspection of a blood line quick connector 3 and two movable seats 2. The top of the movable seat 2 on the left is connected to two liquid distribution chambers 6 via a liquid mixing chamber 5. The liquid mixing chamber 5 and the two liquid distribution chambers 6 are interconnected via a three-way valve 7. The bottom end of the three-way valve 7 is connected to a mixing impeller 8 for mixing simulated liquids via a straight pipe. A uniform component is provided below the mixing impeller 8. Furthermore, the top of the test bench 1 is fixedly connected to two groups of symmetrically arranged guide rails 4, which are slidably connected to the movable seat 2, and the blood circuit quick connector 3 is composed of a male end connector and a female end connector. The two ends of the three-way valve 7 are connected to the two liquid distribution chambers 6 through connecting pipes, and the two liquid distribution chambers 6 are respectively filled with water and glycerin. The bottom end of the three-way valve 7 is fixedly connected to a fixing frame through a straight pipe, and the top of the fixing frame is rotatably connected to the mixing impeller 8. The top of the test bench 1 is fixedly equipped with a cover body, and the uniform component includes a high-pressure chamber 10 and a mixing hose 12. The straight pipe is connected to the mixed liquid chamber 5 through the mixing hose 12. The outer wall of the mixing hose 12 is connected to a sponge ring 11, and the mixing hose 12 is fixedly connected to the inner wall of the high-pressure chamber 10. The top of the mixed liquid chamber 5 is fixedly connected with a storage chamber 9 for storing xanthan gum solution. The storage chamber 9 is connected to the high-pressure chamber 10 through a horizontal pipe, and a plurality of penetration micropores are provided on the side wall of the mixing hose 12; Mixing a certain proportion of glycerol and deionized water (usually 60% glycerol and 40% water) produces a mixed liquid with a density close to that of blood and a Newtonian fluid matrix viscosity. Adding a very small amount of xanthan gum can provide the mixed liquid with significant shear-thinning behavior, making the mixed liquid behave like a non-Newtonian fluid, shear-thinning, and decreasing viscosity with increasing flow rate, thus simulating the fluid properties of blood. The storage chamber 9 presses the xanthan gum solution inside into the high-pressure chamber 10, allowing the xanthan gum solution in the high-pressure chamber 10 to continuously penetrate into the sponge ring 11, so that the xanthan gum solution in the sponge ring 11 always remains rich. It should be noted that: the pumping mechanisms of the liquid dispensing chamber 6 filled with water and the liquid dispensing chamber 6 filled with glycerol are started, and water and glycerol are respectively introduced into the three-way valve 7, and the glycerol and water are kept at nearly 60% of 40% for preliminary mixing. When the water and glycerol flow to the mixing impeller 8, the flowing liquid drives the mixing impeller 8 to rotate, and the rotation of the axially arranged mixing impeller 8 drives the water and glycerol to further mix, and the mixed liquid is in a vortex state, and then the liquid generates a greater liquid pressure on the inner wall of the mixing hose 12, so that the mixing hose 12 will produce a slight deformation to squeeze the sponge ring 11 on its outer wall. The pressure of the sponge ring 11 will cause the xanthan gum solution therein to pass through the permeable micropores on the mixing hose 12 and penetrate into the interior of the mixing hose 12, and be evenly mixed with the liquid in the vortex state, so as to achieve uniform mixing of water, glycerol and a trace amount of xanthan gum solution, and then simulate a fluid property that is closer to that of blood, so that the mixed simulated liquid behaves like a non-Newtonian fluid and has a shear-thinning fluid property. The above advantages are as follows: in this way, the water and glycerin in the two liquid preparation chambers 6 can be mixed and vortexed under the action of the mixing impeller 8, and the xanthan gum solution in the sponge ring 11 on the outer wall of the mixing hose 12 can be pressed out, thereby achieving real-time preparation of the mixed simulated liquid, facilitating the simulation of the fluid properties of blood, making the subsequent simulation tests of the blood circuit quick connector 3 more in line with the actual usage state, making the test results more accurate and reliable, and the real-time configuration of the simulated liquid also avoids the sedimentation and stratification of the liquid, so that the test can be carried out better; The top of the right-side movable base 2 is connected to a receiving chamber 19. The mixing chamber 5 is connected to a docking joint via an input line 13. The receiving chamber 19 is connected to a docking joint via an output line 17. The outer walls of both docking joints are connected to sealing assemblies. A bacterial culture chamber 16 is provided outside the sealing assembly located on the side of the input line 13. A test cylinder 20 is connected to the side wall above the output line 17. A floatation detection assembly is provided in the test cylinder 20 for testing whether there are bubbles in the output line 17. Furthermore, the mixing chamber 5 is connected to the input pipeline 13 through a control valve, and the receiving chamber 19 is connected to the output pipeline 17 through a control valve. The sealing assembly consists of a sealing bucket 14 and an annular sealing strip 15. The docking joint is fixedly connected to the annular sealing strip 15 through the sealing bucket 14. The sealing bucket 14 on the left is connected to the regulating valve of the culture chamber 16. The outer side wall of the sealing bucket 14 on the right is connected to a micro air pump 18 for adjusting the internal air pressure of the sealing bucket 14. The floating detection assembly includes a float 21 arranged at the bottom of the test cylinder 20. The top of the float 21 is fixedly connected to a push rod. The push rod is slidably connected to the inner wall of the test cylinder 20 through a fixing ring. The outer side wall of the push rod is provided with an adjusting spring 22 arranged between the float 21 and the fixing ring. The top of the test cylinder 20 is fixedly connected to a pressure sensor 23 for testing the pressure at the top of the push rod. It should be noted that: during the test, the blood circuit quick connector 3 produced is subjected to a destructive sampling test before leaving the factory. The sampled blood circuit quick connector 3 is spliced in a sterile environment and installed at the connectors on the input pipeline 13 and the output pipeline 17. During the installation process, the two sealing buckets 14 are docked with each other, and the two annular sealing strips 15 are squeezed against each other, so that the blood circuit quick connector 3 is in a sealed environment. Subsequently, when the simulated liquid is transported, the passage between the bacterial culture chamber 16 and the sealing bucket 14 is opened to allow bacteria to enter the sealed space between the two sealing buckets 14 and the blood circuit quick connector 3. At the same time, the micro air pump 18 is started to seal. The funnel 14 is filled with high-pressure gas to test the overall sealing and sterility-maintaining ability of the blood line quick connector 3 under an external high-pressure environment. At the end of the test, a simulated liquid is sampled and marked with information. The sampled liquid is subsequently cultured in the laboratory to observe and detect whether there are bacteria. If the sealing performance of the blood line quick connector 3 is poor, the external high-pressure gas enters the blood line quick connector 3 and generates bubbles. When the bubbles flow with the liquid to the float 21, the buoyancy of the float 21 will decrease. Under the elastic force of the adjustment spring 22, the squeezing force of the push rod on the pressure sensor 23 is reduced, making it easy to quickly detect whether gas pressure has occurred at the blood line quick connector 3. The above advantages are as follows: when simulating the flow of liquid in the blood circuit quick connector 3, a high-pressure, multi-bacteria environment can be simulated externally, and liquid sampling can be subsequently observed to see if bacteria have entered, to test its sterility performance, and the floating detection component can be used to quickly test whether the sealing performance of the blood circuit quick connector 3 is qualified; The input pipe 13 and the output pipe 17 are both connected to a test ring 24. The test ring 24 is connected to multiple transducer impellers 26 via multiple sealing arc plates 25 arranged in an array. The transducer impellers 26 are connected to a speed measuring assembly via a pin. The speed measuring assembly on the left is connected to a through-beam photoelectric sensor 30, and the speed measuring assembly on the right is connected to multiple sensing plates 31. Furthermore, the speed measuring assembly includes a speed measuring rotary plate 27 fixed on the pin shaft of the energy conversion impeller 26, a plurality of arc grooves are arrayed on the test ring 24, the arc grooves are fixedly connected to the sealing arc plate 25, the sealing arc plate 25 is rotatably connected to the energy conversion impeller 26 and the speed measuring rotary plate 27 respectively through the pin shaft, a speed measuring plate 28 is fixedly connected to the side wall of the speed measuring rotary plate 27, and a speed measuring laser sensor 29 is fixedly connected to the outer wall of the sealing arc plate 25. The speed measuring rotary plate 27 on the left is fixedly connected to the corresponding photoelectric sensor 30 through a synchronization rod, and the speed measuring rotary plate 27 on the right is fixedly connected to a plurality of sensing plates 31 arranged in a circumferential array through a synchronization rod; It should be noted that: after the above-mentioned detection is completed, the detection of whether there is liquid stagnation in the blood circuit quick connector 3 is started. The simulated liquid flow will drive the transducer impeller 26 to rotate, and the transducer impeller 26 converts the kinetic energy of the simulated liquid flow into the kinetic energy of its own rotation. The rotation of the transducer impeller 26 will drive the speed measuring plate 27 to rotate, and the speed measuring plate 27 will drive the speed measuring plate 28 to rotate synchronously. The speed measuring laser sensor 29 detects the time it takes for the speed measuring plate 28 to rotate one circle, and the rotation speed of the transducer impeller 26 and the speed measuring plate 27 can be obtained, which is convenient for detecting whether the flow rate of the simulated liquid at various locations in the input pipeline 13 and the output pipeline 17 is consistent. When the flow rate of the simulated liquid is changed, the liquid in the input pipeline 13 section is The flow rate will first increase. After the liquid passes through the blood line quick connector 3, the liquid flow rate in the output line 17 section will gradually increase. Since the liquid flow rate and the liquid flow rate are related to the inner diameter of the tube, when the inner diameters of the input and output lines 13 and 17 are the same, the liquid flow rate can indicate the liquid flow rate therein. If, after the flow rate of the simulated liquid changes, the chamber inside the blood line quick connector 3 experiences stagnation for the simulated liquid, the liquid flow rate flowing into the output line 17 will decrease at the beginning of the flow rate change. The corresponding initial response flow rate increase of the output line 17 will be less than the flow rate in the input line 13. Therefore, before and after the flow rate change, the rotation of the sensing plate 31 will have a certain angular deviation from the rotation of the opposing photoelectric sensor 30. The above advantages include: By utilizing the angle difference between the opposing photoelectric sensor 30 and the sensing plate 31 before and after the flow rate changes, it is possible to detect whether the viscosity change of the simulated liquid during the flow rate change will cause stagnation in the chamber of the blood quick connector 3, thereby preventing clotting problems during use of the blood quick connector 3 and preventing unqualified batches of blood quick connectors 3 from being shipped out of the factory; When the present invention is in use, the pumping mechanisms of the liquid dispensing chamber 6 filled with water and the liquid dispensing chamber 6 filled with glycerin are started, and water and glycerin are respectively introduced into the three-way valve 7, and the glycerin and water are kept at nearly 60% of 40% for preliminary mixing. When the water and glycerin flow to the mixing impeller 8, the flowing liquid drives the mixing impeller 8 to rotate. The rotation of the axially arranged mixing impeller 8 drives the water and glycerin to be further mixed, and the mixed liquid is in a vortex state, and then the liquid generates a greater liquid pressure on the inner wall of the mixing hose 12, so that the mixing hose 12 will produce a slight deformation to squeeze the sponge ring 11 on its outer wall. The pressure of the sponge ring 11 will cause the xanthan gum solution in it to penetrate into the interior of the mixing hose 12 through the permeable micropores on the mixing hose 12. , and evenly mix with the liquid in a vortex state to achieve uniform mixing of water, glycerol and a trace amount of xanthan gum solution, thereby simulating fluid properties that are relatively close to blood, so that the mixed simulated liquid exhibits non-Newtonian fluid behavior and has shear-thinning fluid properties. In this way, the water and glycerol in the two liquid distribution chambers 6 can be mixed and generated under the action of the mixing impeller 8 to press out the xanthan gum solution in the sponge ring 11 on the outer wall of the mixing hose 12, thereby achieving real-time preparation of the mixed simulated liquid, facilitating the simulation of the fluid properties of blood, and making the subsequent simulation tests of the blood circuit quick connector 3 more in line with the actual usage state, making the test results more accurate and reliable, and the real-time configuration of the simulated liquid also avoids the sedimentation and stratification of the liquid, so that the test can be better carried out; During the test, the completed blood circuit quick connectors 3 are subjected to a destructive random inspection before leaving the factory. The inspected blood circuit quick connectors 3 are spliced in a sterile environment and respectively installed at the connectors on the input pipeline 13 and the output pipeline 17. During the installation process, the two sealing buckets 14 will dock with each other, and the two annular sealing strips 15 will squeeze each other to put the blood circuit quick connector 3 in a sealed environment. Subsequently, when transporting the simulated liquid, the channel between the bacterial culture chamber 16 and the sealing bucket 14 is opened to allow bacteria to enter the sealed space between the two sealing buckets 14 and the blood circuit quick connector 3. At the same time, the micro air pump 18 is started to fill the sealing bucket 14 with high-pressure gas to test the overall sealing and sterility maintenance ability of the blood circuit quick connector 3 under the external high-pressure environment. Sampling is taken at the end of the test. The simulated liquid is marked with information, and the sampled liquid is subsequently used for laboratory culture to observe and detect whether there are bacteria. If the sealing performance of the blood circuit quick connector 3 is poor, the external high-pressure gas enters the blood circuit quick connector 3 and generates bubbles. When the bubbles flow with the liquid to the float 21, the buoyancy of the float 21 is reduced. Under the elastic force of the adjustment spring 22, the squeezing force of the push rod on the pressure sensor 23 is reduced, which facilitates the rapid detection of whether gas pressure has occurred in the blood circuit quick connector 3. In this way, when simulating the flow of liquid in the blood circuit quick connector 3, a high-pressure environment with a multi-bacteria environment can be simulated externally. The sampled liquid is subsequently observed to see whether bacteria have entered, and its performance in maintaining sterility is tested. The float detection component is used to quickly test whether the sealing performance of the blood circuit quick connector 3 is qualified. After the above detection is completed, the blood circuit quick connector 3 is detected for whether there is liquid stagnation. The simulated liquid flow will drive the transducer impeller 26 to rotate, and the transducer impeller 26 converts the kinetic energy of the simulated liquid flow into the kinetic energy of its own rotation. The rotation of the transducer impeller 26 will drive the speed measuring plate 27 to rotate, and the speed measuring plate 27 will drive the speed measuring plate 28 to rotate synchronously. The speed measuring laser sensor 29 detects the time it takes for the speed measuring plate 28 to rotate one circle, and the rotation speed of the transducer impeller 26 and the speed measuring plate 27 can be obtained, which is convenient for detecting whether the flow rate of the simulated liquid in the input pipeline 13 and the output pipeline 17 is consistent. When the flow rate of the simulated liquid is changed, the liquid flow rate of the input pipeline 13 section will increase first, and the liquid will gradually increase the liquid flow rate of the output pipeline 17 section after passing through the blood circuit quick connector 3. Since the flow rate of the liquid is related to the flow rate of the liquid and the inner diameter of the tube, in the input pipeline When the inner diameters of the input and output pipes 13 and 17 are the same, the liquid flow rate can indicate the flow rate of the liquid therein. If, after the flow rate of the simulated liquid changes, the chamber inside the blood quick connector 3 experiences stagnation of the simulated liquid, the liquid flow rate flowing into the output pipe 17 will decrease at the initial stage of the flow rate change. Accordingly, the initial increase in the flow rate of the output pipe 17 is less than the flow rate in the input pipe 13. Therefore, before and after the flow rate change, the rotation of the sensing plate 31 will have a certain angular deviation from the rotation of the opposing photoelectric sensor 30. This angular difference between the opposing photoelectric sensor 30 and the sensing plate 31 before and after the flow rate change can be used to detect whether the viscosity change of the simulated liquid during the flow rate change will cause stagnation in the chamber of the blood quick connector 3. This can prevent clotting problems during use of the blood quick connector 3 and prevent unqualified batches of blood quick connectors 3 from being shipped.
[0023] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.
Claims
1. A quality inspection device for medical equipment processing, comprising a test bench (1) for quality inspection of blood line quick connectors (3) and two movable seats (2), characterized in that: The top end of the movable seat (2) on the left side is connected to two liquid distribution chambers (6) via a liquid mixing chamber (5), the liquid mixing chamber (5) and the two liquid distribution chambers (6) are communicated with each other via a three-way valve (7), the bottom end of the three-way valve (7) is connected to a mixing impeller (8) for mixing simulated liquid via a straight pipe, and a uniform component is provided below the mixing impeller (8); The top of the movable seat (2) on the right side is connected to a receiving chamber (19), the mixed liquid chamber (5) is connected to a docking joint via an input pipe (13), and the receiving chamber (19) is connected to a docking joint via an output pipe (17). The outer side walls of the two docking joints are connected to sealing components. A bacterial culture chamber (16) is provided outside the sealing component located on the side of the input pipe (13). A test cylinder (20) is connected to the upper side wall of the output pipe (17). The test cylinder (20) is provided with a A float detection component for testing whether bubbles exist in the output pipeline (17) is provided. The input pipeline (13) and the output pipeline (17) are both connected to a test ring (24). The test ring (24) is connected to a plurality of transducer impellers (26) via a plurality of sealing arc plates (25) arranged in an array. The transducer impellers (26) are connected to a speed measurement component via a pin. The speed measurement component on the left is connected to a photoelectric sensor (30), and the speed measurement component on the right is connected to a plurality of sensing plates (31).
2. A quality inspection equipment for medical device processing according to claim 1, characterized in that: The top of the test bench (1) is fixedly connected to two groups of symmetrically arranged guide rails (4), the guide rails (4) are slidably connected to the movable seat (2), the blood circuit quick connector (3) is composed of a male end connector and a female end connector, and the top of the test bench (1) is fixedly equipped with a cover.
3. The quality inspection equipment for medical device processing according to claim 1, characterized in that: The two ends of the three-way valve (7) are connected to the two liquid distribution chambers (6) through connecting pipes, respectively. The two liquid distribution chambers (6) are respectively filled with water and glycerin. The bottom end of the three-way valve (7) is fixedly connected to a fixing frame through a straight pipe, and the top end of the fixing frame is rotatably connected to the mixing impeller (8).
4. The quality inspection equipment for medical device processing according to claim 1, characterized in that: The uniform component includes a high-pressure chamber (10) and a mixing hose (12), the straight pipe is connected to the mixed liquid chamber (5) through the mixing hose (12), the outer wall of the mixing hose (12) is connected to a sponge ring (11), the mixing hose (12) is fixedly connected to the inner wall of the high-pressure chamber (10), the top of the mixed liquid chamber (5) is fixedly connected to a storage chamber (9) for storing xanthan gum solution, the storage chamber (9) is connected to the high-pressure chamber (10) through a horizontal pipe, and a plurality of permeable micropores are opened on the side wall of the mixing hose (12).
5. The quality inspection equipment for medical device processing according to claim 1, characterized in that: The liquid mixing chamber (5) is connected to the input pipeline (13) through a control valve, and the receiving chamber (19) is connected to the output pipeline (17) through a control valve.
6. The quality inspection equipment for medical device processing according to claim 1, characterized in that: The sealing assembly consists of a sealing hopper (14) and an annular sealing strip (15), the butt joint is fixedly connected to the annular sealing strip (15) through the sealing hopper (14), the sealing hopper (14) on the left is connected to the regulating valve of the bacterial culture chamber (16), and the outer side wall of the sealing hopper (14) on the right is connected to a micro air pump (18) for adjusting the internal air pressure of the sealing hopper (14).
7. The quality inspection equipment for medical device processing according to claim 1, characterized in that: The floating test assembly comprises a float (21) arranged at the bottom of a test cylinder (20); a top end of the float (21) is fixedly connected to a push rod; the push rod is slidably connected to the inner wall of the test cylinder (20) via a fixing ring; an outer wall of the push rod is sleeved with an adjustment spring (22) arranged between the float (21) and the fixing ring; and a pressure sensor (23) for testing the pressure at the top of the push rod is fixedly connected to the top of the test cylinder (20).
8. The quality inspection equipment for medical device processing according to claim 1, characterized in that: The speed measuring assembly includes a speed measuring rotating plate (27) fixed on a pin shaft of the energy conversion impeller (26); a plurality of arc grooves are arranged in an array on the test ring (24); the arc grooves are fixedly connected to the sealing arc plate (25); and the sealing arc plate (25) is rotationally connected to the energy conversion impeller (26) and the speed measuring rotating plate (27) through the pin shaft.
9. The quality inspection equipment for medical device processing according to claim 8, characterized in that: The side wall of the speed measuring rotating plate (27) is fixedly connected to a speed measuring plate (28), the outer side wall of the sealing arc plate (25) is fixedly connected to a speed measuring laser sensor (29), the speed measuring rotating plate (27) on the left is fixedly connected to a corresponding photoelectric sensor (30) via a synchronization rod, and the speed measuring rotating plate (27) on the right is fixedly connected to a plurality of sensing plates (31) arranged in a circumferential array via a synchronization rod.