Air tightness detection device for blood perfusion device

Abstract

The present invention provides an airtightness detection device for a blood perfusion device, belonging to the technical field of airtightness detection for blood perfusion devices. The airtightness detection device for a blood perfusion device comprises an inflation assembly, comprising a fixing base and an inflation plug. A side of the fixing base near the detection assembly defines an inflation jack with an axis extending in a front-to-rear direction thereof. A inflation passage extending through the fixing base is defined at the top center of the inflation jack. The inflation plug is sleeved within the inflation jack and is coaxial with the inflation jack. A communicating hole coaxial with the inflation plug and extending through the inflation plug is defined at one end. A circular magnet is fixedly mounted on the end of the inflation plug away from the detection assembly. A connecting hole communicating with the inflation passage is defined at the top center of the communicating hole. A sealing plug is slidably sleeved on the side of the communicating hole near the circular magnet. The end of the sealing plug near the circular magnet is a permanent magnet, and the two sides near each other have the same magnetic properties. This device can operate stably and for a long time in a high-pressure environment.

Description

Technical Field

[0001] The present invention belongs to the technical field of air tightness detection of blood perfusion devices, and in particular relates to an air tightness detection device for a blood perfusion device. Background Art

[0002] Hemoperfusion devices are mainly used for the adsorption of molecular toxins in acute and chronic drug poisoning, uremia, and pathogenic factors in liver disease and immunity. They generally include a cylinder for accommodating the adsorbent and end caps connected to both ends of the cylinder. Both end caps of the cylinder are provided with connectors.

[0003] Chinese patent application number CN114739599B discloses a seal detection device for a hemoperfusion device, comprising a base, a drive mechanism, a workpiece mounting platform, and an inflation mechanism. The workpiece mounting platform is provided with a first spring near one end of the fixed base. The sliding base is provided with a plurality of first plug holes that can be plugged into and mate with a connector at one end of the hemoperfusion device. The sliding base is provided with a plurality of barometers connected to each of the first plug holes. The fixed base is provided with a plurality of second plug holes that can be plugged into and mate with a connector at the other end of the hemoperfusion device. The inflation mechanism is used to inflate the hemoperfusion device.

[0004] When existing detection devices are testing multiple blood perfusion devices at the same time, one inflation pump is usually used to inflate the multiple blood perfusion devices. In order to prevent gas backflow, a one-way valve or a solenoid valve is usually set on the inflation branch pipe. At the same time, when a blood perfusion device is not installed in some detection stations, an elastic piston valve is usually set in the vent to prevent high-pressure gas from entering the vent corresponding to the station. However, the pressure during detection usually reaches 100KPa, and the one-way valve, solenoid valve or elastic piston valve is prone to failure when working under long-term high pressure, which makes the entire device unusable. Even if the use of a valve with better performance can extend the use time of the detection device to a certain extent, it will also lead to an increase in the cost of the detection device. Summary of the Invention

[0005] The purpose of the present invention is to provide an airtightness detection device for a blood perfusion device, aiming to solve the problem in the prior art that the valve of the detection device is prone to failure due to long-term pressure in a high-pressure environment, resulting in frequent failures of the detection device and increased costs.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solutions: an airtightness detection device for a blood perfusion device, comprising a base, a detection component and an inflation component, the detection component and the inflation component being respectively located at the rear and front sides of the top of the base, the inflation component comprising a fixing seat and an inflation plug, a side of the fixing seat close to the detection component being provided with an inflation socket with an axis extending in the front-to-back direction thereof, an inflation channel penetrating the fixing seat being provided at the top middle portion of the inflation socket, the inflation plug being sleeved in the inflation socket and being coaxial therewith, a connecting hole being provided at one end of the inflation plug being coaxial therewith and penetrating the inflation plug, A circular magnet is fixedly installed on the end of the air plug column away from the detection component, and a connecting hole connected to the inflation channel is opened in the middle of the top of the connecting hole. A sealing plug column is slidably sleeved on the side of the connecting hole close to the circular magnet. The end of the sealing plug column close to the circular magnet is a permanent magnet, and the magnetic properties of the two sides close to each other are the same. A mounting hole with an axis parallel to the axis of the inflation plug column is opened on the inner wall of the connecting hole close to the circular magnet, and a vent hole is opened between the side of the connecting hole close to the circular magnet and the bottom of the mounting hole. A pressure difference drive switch is installed on the inner wall of the mounting hole to control the on and off of the vent hole.

[0007] The beneficial effects of the present invention are as follows: by setting a sealing plug, a pressure differential drive switch and a circular magnet, when the inflation pressure reaches the pressure required for the perfusion device detection, the pressure differential drive switch is activated and turned on, so that the inflation gas can smoothly enter the right area of ​​the sealing plug through the vent. In this way, the gas pressure at the left and right ends of the sealing plug is balanced. At this time, under the action of the repulsive force between the circular magnet and the permanent magnet at the right end of the sealing plug, the sealing plug will slide to the left. When the sealing plug slides to the bottom of the connecting hole, the connection between the connecting hole and the left end of the connecting hole is effectively closed by the sealing plug, thereby preventing further inflation of the inner wall of the perfusion device, and also ensuring that the gas in the perfusion device cannot flow out. This design facilitates the airtightness detection of the perfusion device. In addition, the device does not use precision components such as one-way valves and solenoid valves, so it can work stably in a high-pressure environment for a long time, significantly improving the service life of the device.

[0008] The pressure differential driven switch includes a fixed rod fixedly installed at one end of the mounting hole close to the circular magnet and having a hollow interior. A piston is slidably sleeved left and right in the cavity of the fixed rod. A telescopic rod is fixedly installed at the end of the piston away from the circular magnet. High-pressure gas is filled between the other end of the piston and the cavity of the fixed rod. A sealing block is fixedly installed after the end of the telescopic rod away from the circular magnet slides through the fixed rod. The outer wall of the sealing block contacts the inner wall of the mounting hole and the two are slidably connected. The vent is located between the sealing block and the fixed rod.

[0009] An air channel is provided at the top of the sealing plug near the circular magnet, and a limiting hole is provided at the bottom of the air channel which passes through the sealing plug. The bottom of the vent hole is connected to the air channel, and a pressure difference driven locking part is fixedly installed at the bottom of the connecting hole near the circular magnet to limit the sliding of the sealing plug.

[0010] The pressure difference driven locking part includes a fixed column fixedly installed inside the inflatable plug column, with its axis parallel to the axis of the connecting hole and the interior being hollow. A plug block is slidably sleeved up and down in the cavity of the fixed column. A telescopic column is fixedly installed on the top of the plug block. The top end of the telescopic column slides through the fixed column and then extends into the limiting hole. High-pressure gas is filled between the bottom of the plug block and the cavity of the fixed column.

[0011] The effect is that by setting a pressure difference to drive the locking member, the locking member can automatically limit the left and right sliding of the sealing plug according to the size of the gas pressure in the airway, thereby effectively controlling the air intake and exhaust process of the perfusion device and ensuring the smooth progress of the air tightness test of the perfusion device.

[0012] The inflation plug is slidably connected to the inflation socket. A reset magnet is fixedly installed on the end of the inflation socket away from the detection component. The reset magnet and the side of the circular magnet that are close to each other have the same magnetic properties. A second seal is fixedly sleeved on the inner wall of the other end of the inflation socket, and an inflation tube is installed on the top of the inflation channel.

[0013] The effect is that, by providing a reset magnet and a circular magnet, the left and right sliding motion of the inflation plug can be controlled. During the perfusion device airtightness test, the inflation plug slides to the right, aligning and connecting the connecting hole with the inflation channel, thus ensuring normal inflation of the perfusion device. When there is no perfusion device at this station, the inflation plug slides to the left due to the repulsive force of the reset magnet and the circular magnet, causing the connecting hole to no longer align with and connect with the inflation channel, making inflation impossible.

[0014] The detection assembly includes a sliding seat, which is parallel to the fixed seat and extends in the left and right directions of the base. A detection socket coaxial with the inflation socket is provided on the side of the sliding seat close to the fixed seat. The detection socket corresponds to the inflation socket. A barometer is fixedly installed on the top of the sliding seat. The barometer corresponds to the detection socket, and the detection probe of the barometer extends into the detection socket.

[0015] The internal sliding sleeve of the detection socket is connected with a sliding seal, and a sealing hole is opened at one end of the sliding seal, which is coaxial with the detection socket and passes through the sliding seal. The diameter of the sealing hole gradually decreases from one side close to the fixed seat to the other side, forming a conical structure. The inner wall of the end of the detection socket close to the fixed seat is fixedly sleeved with a first seal, and the other end of the detection socket is fixedly installed with a sealing magnet. The end of the sliding seal close to the sealing magnet is fixedly installed with a permanent magnet, and the permanent magnet and the sealing magnet have the same magnetic properties on the side close to each other.

[0016] The effect is that, by providing the sliding seal, leakage of gas inside the cartridge through the detection jack can be effectively avoided during the cartridge air tightness test, thereby ensuring the accuracy of the cartridge air tightness test result.

[0017] Driving components are fixedly installed on both left and right ends of the fixed seat, and are used to drive the sliding seat to slide towards the fixed seat.

[0018] A fixing component is provided between the detection component and the inflation component. The fixing component includes a mounting platform slidably mounted on the base. Clamping parts are installed on the front and rear sides of the top of the mounting platform. The clamping part close to the inflation component is fixedly connected to the mounting platform, and the clamping part close to the detection component is slidably connected to the mounting platform. A first telescopic part is installed between the two ends of the two clamping parts for adjusting the distance between the two clamping parts.

[0019] The clamping part includes a lower clamping plate and an upper clamping plate extending in the left and right directions. A second telescopic part is installed between the two ends of the lower clamping plate and the upper clamping plate, which is used to drive the upper clamping plate to move up and down. The lower clamping plate and the upper clamping plate are provided with a plurality of clamping grooves extending in the left and right directions on the side where they are close to each other. The plurality of clamping grooves correspond one by one to the plurality of detection sockets.

[0020] The effect is that, by providing two groups of clamping members with adjustable spacing, the device can clamp and fix perfusates of different lengths, thereby improving the applicability of the device.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] By setting up a sealing plug, a pressure differential drive switch and a circular magnet, when the inflation pressure reaches the pressure required for the perfusion device detection, the pressure differential drive switch is activated and turned on, allowing the inflation gas to smoothly enter the right area of ​​the sealing plug through the vent. In this way, the gas pressure on the left and right ends of the sealing plug is balanced. At this time, under the action of the repulsive force between the circular magnet and the permanent magnet on the right end of the sealing plug, the sealing plug will slide to the left. When the sealing plug slides to the bottom of the connecting hole, the connection between the connecting hole and the left end of the connecting hole is effectively closed by the sealing plug, thereby preventing further inflation of the inner wall of the perfusion device, and also ensuring that the gas in the perfusion device cannot flow out. This design facilitates the airtightness detection of the perfusion device. In addition, the device does not use precision components such as one-way valves and solenoid valves, so it can work stably in a high-pressure environment for a long time, significantly improving the service life of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 Schematic diagram of the three-dimensional structure of the detection device of the present invention;

[0024] Figure 2 Schematic diagram of a top view of the detection device of the present invention during detection;

[0025] Figure 3 is a schematic top view of the detection device of the present invention when not in use;

[0026] Figure 4 is a schematic front cross-sectional view of the detection device of the present invention when not in use;

[0027] Figure 5 is a schematic top cross-sectional view of the detection device of the present invention during detection;

[0028] Figure 6 is a side cross-sectional schematic diagram of the detection device of the present invention when detecting inflation;

[0029] Figure 7 is a side cross-sectional schematic diagram of the fixing seat of the present invention at the end of inflation;

[0030] Figure 8 A schematic side cross-sectional view of the fixing seat during testing in the present invention;

[0031] Figure 9 For the present invention Figure 7 Schematic diagram of the enlarged structure at point A in the middle.

[0032] In the figure: 1. Base; 11. Guide slide; 12. Mounting slot; 121. Card slot; 2. Detection assembly; 21. Sliding seat; 211. Detection socket; 212. Guide slider; 22. Barometer; 23. Sliding seal; 231. Sealing hole; 24. Sealing magnet; 25. First sealing member; 3. Inflatable assembly; 31. Fixing seat; 311. Inflatable socket; 312. Inflatable channel; 32. Inflatable tube; 33. Inflatable plug; 331. Circular magnet; 332. Connecting hole; 333. Connecting hole; 334. Mounting hole; 335. Vent hole; 34. Reset magnet; 35. Second sealing member; 36. Pressure differential drive switch; 361. Fixed rod; 362. Piston; 363. Sealing block; 364. Telescopic rod; 37. Pressure differential drive locking member; 371. Fixed column; 372. Plug block; 373. Telescopic column; 38. Sealing plug column; 381. Airway; 382. Limiting hole; 4. Driving member; 5. Fixed assembly; 51. Mounting platform; 511. Limiting slide groove; 512. Card; 52. Clamping member; 521. Lower splint; 522. Upper splint; 523. Clamping groove; 524. Limiting slider; 525. Second telescopic member; 53. First telescopic member; 6. Irrigation device housing; 61. Plug connector. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0034] See also Figures 1-9The present invention provides the following technical solutions: An airtightness detection device for a blood perfusion device, comprising a base 1, a detection component 2, an inflation component 3, a driving member 4 and a fixing component 5. The detection component 2 is mounted on the top rear side of the base 1 and can slide along the front-to-back direction of the base 1; the inflation component 3 is fixedly mounted on the top front side of the base 1; the fixing component 5 is located between the detection component 2 and the inflation component 3 and can also slide along the front-to-back direction of the base 1. Two driving members 4 are provided, which are fixedly mounted on the left and right sides of the inflation component 3, respectively, to drive the detection component 2 to move toward the inflation component 3. When performing an airtightness test, the perfusion device housing 6 is first clamped and fixed by the fixing component 5 to ensure that the plug connectors 61 at both ends of the perfusion device housing 6 point to the detection component 2 and the inflation component 3, respectively. Then the driving member 4 is started to drive the detection component 2 to move toward the inflation component 3. When the detection component 2 moves to contact the cartridge housing 6, it drives the cartridge housing 6 and the fixing component 5 to move toward the inflation component 3 until the plug connectors 61 at both ends of the cartridge housing 6 are inserted into the detection component 2 and the inflation component 3 respectively.

[0035] refer to Figure 2 As shown, the detection assembly 2 includes a sliding base 21, a barometer 22, a sliding seal 23, a sealing magnet 24, and a first seal 25. Guide slots 11 extending in the front-to-back direction are defined on both the left and right sides of the top of the base 1. The sliding base 21 extends in the left-right direction, with guide sliders 212 fixedly mounted at each end of its bottom. These guide sliders 212 slide within the guide slots 11, thereby guiding the detection assembly 2 as it moves toward the inflation assembly 3.

[0036] refer to Figure 5 and Figure 6 As shown, at least one detection socket 211 is provided in the middle of one side of the sliding seat 21 near the inflatable component 3. When there are multiple detection sockets 211, these detection sockets 211 are evenly distributed along the left and right directions of the sliding seat 21, and the axis of each detection socket 211 extends along the front-to-back direction. The number of barometers 22, sliding seals 23, sealing magnets 24 and first seals 25 corresponds to the number of detection sockets 211. Specifically, a sliding seal 23, a sealing magnet 24 and a first seal 25 are installed in each detection socket 211, and multiple barometers 22 are installed on the top of the sliding seat 21, each barometer 22 corresponds to a detection socket 211, and the detection probe of each barometer 22 extends into its corresponding detection socket 211.

[0037] The sliding seal 23 is slidably mounted in the detection socket 211 along the front-to-back direction. The sliding seal 23 is a cylindrical seal coaxial with the detection socket 211. A sealing hole 231 coaxial with the detection socket 211 and passing through the sliding seal 23 is provided at one end of the sliding seal 23. The sealing hole 231 gradually decreases in diameter from the side close to the inflation component 3 to the other side, forming a conical structure. The first seal 25 is fixedly mounted on the inner wall of the end of the detection socket 211 close to the inflation component 3. The sealing magnet 24 is fixedly mounted on the other end of the detection socket 211. A permanent magnet is fixedly mounted on the end of the sliding seal 23 close to the sealing magnet 24, and the permanent magnet has the same magnetic properties as the side close to the sealing magnet 24, forming a repulsive force. As the sliding seat 21 slides toward the inflation assembly 3, the plug connector 61 of the cartridge is inserted into the detection socket 211. After the plug connector 61 contacts the sealing hole 231, it pushes the sliding seal 23 to slide. When the cartridge is filled with high-pressure gas, the gas flows through the plug connector 61 and the sealing hole 231 into the space between the sliding seal 23 and the sealing magnet 24. At this time, the high-pressure gas presses the sliding seal 23 against the plug connector 61, thereby forming a seal and preventing gas leakage in the cartridge during testing.

[0038] refer to Figure 5-Figure 9 As shown, the inflation component 3 includes a fixed seat 31, an inflation tube 32, an inflation plug 33, a reset magnet 34, a second sealing member 35, a pressure differential drive switch 36, a pressure differential drive locking member 37 and a sealing plug 38. At least one inflation socket 311 is provided in the middle of one side of the fixed seat 31 close to the sliding seat 21. When there are multiple inflation sockets 311, these inflation sockets 311 will be evenly distributed along the left and right directions of the fixed seat 31, and the axis of each inflation socket 311 will extend along the front and back directions. Each inflation socket 311 is coaxial with a detection socket 211 and the number corresponds one to one. Specifically, each inflation socket 311 is equipped with an inflation plug 33, a reset magnet 34, a second sealing member 35, a pressure differential drive switch 36, a pressure differential drive locking member 37 and a sealing plug 38. In addition, an inflation channel 312 penetrating the fixing seat 31 is provided at the middle of the top of each inflation socket 311 , and the inflation tube 32 is connected to all the inflation channels 312 for filling these inflation channels 312 with high-pressure gas.

[0039] refer to Figure 7As shown, the inflation plug 33 is slidably sleeved in the inflation socket 311 and is coaxial with it. A circular magnet 331 is fixedly mounted on the end of the inflation plug 33 away from the detection component 2. A connecting hole 332 is provided at the other end of the inflation plug 33, which is coaxial with it and runs through the entirety of the inflation plug 33. A connecting hole 333 connected to the inflation channel 312 is further provided at the middle of the top end of the connecting hole 332. The reset magnet 34 is fixedly mounted in the inflation socket 311 and is located at the end away from the sliding seat 21. The reset magnet 34 and the circular magnet 331 have the same magnetic properties on the side close to each other, so a repulsive force is generated between them. The second seal 35 is fixedly mounted on the inner wall of the other end of the inflation socket 311.

[0040] When the plug connector 61 of the inflator is inserted into the inflation socket 311, the plug connector 61 pushes the inflation plug 33 to slide along the socket. As the inflation plug 33 slides, the connecting hole 333 on it aligns with and connects with the inflation channel 312, allowing gas to pass through and inflate the inflator. When the test is completed, the plug connector 61 is pulled out of the inflation socket 311. At this time, the reset magnet 34 uses the repulsive force between it and the circular magnet 331 to push the inflation plug 33 to reset. After resetting, the inflation channel 312 is blocked by the inflation plug 33, making it impossible to inflate.

[0041] refer to Figure 9 As shown, a sealing plug 38 is slidably mounted on the side of the connecting hole 332 close to the circular magnet 331. The end of the sealing plug 38 close to the circular magnet 331 is a permanent magnet, and the permanent magnet and the side close to the circular magnet 331 have the same magnetic properties, forming a repulsive force. A mounting hole 334 is provided on the inner wall of the connecting hole 333 close to the circular magnet 331, and the axis is parallel to the axis of the inflatable plug 33. A vent hole 335 is also provided between the side of the connecting hole 332 close to the circular magnet 331 and the bottom of the mounting hole 334. A pressure difference drive switch 36 is installed on the inner wall of the mounting hole 334, which is used to control the on / off state of the vent hole 335.

[0042] The pressure differential driven switch 36 includes a fixed rod 361 fixedly mounted on one end of the mounting hole 334 near the circular magnet 331, and the interior of the fixed rod 361 is hollow. A piston 362 is slidably mounted in the cavity of the fixed rod 361. The end of the piston 362 away from the circular magnet 331 is fixedly connected to a telescopic rod 364, while the cavity between the other end of the piston 362 and the fixed rod 361 is filled with high-pressure gas. The pressure of the high-pressure gas is set to be equal to or slightly lower than the pressure of the gas inside the perfusion device during testing. After the end of the telescopic rod 364 away from the circular magnet 331 slides through the fixed rod 361, a sealing block 363 is fixedly mounted. The outer wall of the sealing block 363 is in close contact with the inner wall of the mounting hole 334, and the two are slidably connected. It is worth noting that the vent 335 is located exactly between the sealing block 363 and the fixed rod 361.

[0043] During inflation, when the internal pressure of the cartridge reaches the required test pressure, the sealing block 363, under the pressure of the high-pressure gas in the connecting hole 333, drives the telescopic rod 364 and piston 362 to slide toward the right of the fixed rod 361. When the sealing block 363 moves to the right of the vent hole 335, the vent hole 335 and the connecting hole 333 are connected. The high-pressure gas then enters the right side of the sealing plug 38 through the vent hole 335, thereby achieving pressure balance on the left and right sides of the sealing plug 38. The repulsive force between the permanent magnet and the circular magnet 331 causes the sealing plug 38 to slide to the left. When the sealing plug 38 is located below the connecting hole 333, gas can no longer enter the cartridge through the connecting hole 332, and the inflation process ceases. As the gas pressure in the connecting hole 333 gradually decreases, the sealing block 363 returns to its original position under the pressure of the high-pressure gas in the fixed rod 361, thereby disabling the connection between the vent hole 335 and the connecting hole 333.

[0044] An air passage 381 is defined at the top of the sealing plug 38, near the circular magnet 331. A retaining hole 382 is defined at the bottom of the air passage 381, extending through the sealing plug 38. The bottom of the vent hole 335 is connected to the air passage 381. A pressure-differential-driven locking member 37 is fixedly mounted at the bottom of the connecting hole 332, near the circular magnet 331. This pressure-differential-driven locking member 37 comprises a fixed post 371, fixedly mounted within the inflatable plug 33, with its axis parallel to the axis of the connecting hole 333. The interior of this post 371 is hollow. A plug 372 is slidably mounted within the cavity of this post 371. A telescopic post 373 is fixedly mounted at the top of this post 372. The top end of this post 373 slides through the fixed post 371 and extends into the retaining hole 382. High-pressure gas is filled between the bottom of the plug 372 and the cavity of the fixed post 371. The pressure of this high-pressure gas is lower than that of the high-pressure gas within the fixed rod 361.

[0045] When the vent hole 335 connects to the connecting hole 333, the high-pressure gas within the connecting hole 333 enters the airway 381 and the right side of the sealing plug 38. Because the pressure within the fixed column 371 is lower than the pressure within the fixed rod 361, the high-pressure gas entering the airway 381 can press the telescopic column 373, located within the limiting hole 382, ​​back into the cavity of the fixed column 371. At this point, the telescopic column 373 no longer obstructs the sliding of the sealing plug 38. When the sealing plug 38 slides below the connecting hole 333, the high-pressure gas in the airway 381 and the right side of the sealing plug 38 is discharged through the connecting hole 333 and the inflation channel 312. Subsequently, the telescopic column 373 returns to its original position under the pressure of the high-pressure gas within the fixed column 371, limiting the rightward sliding of the sealing plug 38. This prevents the telescopic column 373 from returning to its original position under the pressure of the high pressure within the cartridge, which could cause the high-pressure gas within the cartridge to leak through the connecting hole 332 and the connecting hole 333.

[0046] refer to Figure 3 and Figure 4 As shown, a mounting groove 12 is provided in the middle of the top of the base 1, and a card slot 121 extending in the front-to-back direction is provided on the left and right side walls of the mounting groove 12. The mounting platform 51 in the fixed component 5 is slidably installed in the mounting groove 12, and a card plate 512 extending in the front-to-back direction is fixedly installed on the left and right side walls of the mounting platform 51, and these card plates 512 are slidably sleeved in the corresponding card slots 121. Clamping members 52 are installed on the front and back sides of the top of the mounting platform 51, wherein the clamping member 52 close to the inflatable component 3 is fixedly connected to the mounting platform 51, and the clamping member 52 close to the detection component 2 is slidably connected to the mounting platform 51. A first telescopic member 53 is installed between the two ends of the two clamping members 52 for adjusting the distance between the two clamping members 52. In addition, limiting grooves 511 are provided on both sides of the top of the mounting platform 51, and limiting sliders 524 are slidably installed inside the two limiting grooves 511. The top of the limiting slider 524 is fixedly connected to the bottom end of the clamping member 52 slidably installed on the mounting platform 51.

[0047] The clamping member 52 includes a lower clamping plate 521 and an upper clamping plate 522 extending in the left-right direction. Between the two ends of the lower clamping plate 521 and the upper clamping plate 522, a second telescopic member 525 is installed, and these second telescopic members 525 are used to drive the upper clamping plate 522 to perform lifting motion. The side where the lower clamping plate 521 and the upper clamping plate 522 are close to each other is provided with at least one clamping groove 523. When the number of clamping grooves 523 is multiple, these clamping grooves 523 extend in the left-right direction of the clamping member 52. The number of these clamping grooves 523 matches the number of detection sockets 211, and corresponds one to one. The shape of the clamping groove 523 is semicircular, so when two mutually corresponding clamping grooves 523 on the lower clamping plate 521 and the upper clamping plate 522 are combined together, they can form a complete circular groove.

[0048] The operating principle of the embodiment of the present invention is as follows: When testing the cartridge, the cartridge housing 6 is first fixed to the fixing assembly 5. Subsequently, the driver 4 is activated, causing it to drive the sliding seat 21 to slide toward the fixing seat 31. When the sliding seat 21 contacts the cartridge housing 6, it drives the cartridge housing 6 and the fixing assembly 5 to slide toward the fixing seat 31. When the cartridge housing 6 and the fixing seat 31 are fully in contact, the driver 4 is controlled to stop. At this point, the plug connector 61 on the cartridge housing 6 has been inserted into the inflation jack 311 and has pushed the inflation plug 33 to slide within the jack, so that the connecting hole 333 on the inflation plug 33 is aligned with the inflation channel 312 and connected.

[0049] An air pump inflates the inflation channel 312, which then enters the cartridge through the connecting hole 333 and the connecting hole 332. When the internal pressure of the cartridge reaches the required detection value, the pressure differential drive switch 36 is activated and opened, connecting the vent hole 335 with the connecting hole 333. At this point, high-pressure gas enters the airway 381 and the right side of the sealing plug 38 through the vent hole 335. The high-pressure gas presses the telescopic column 373 of the pressure differential drive locking member 37, located within the limiting hole 382, ​​back into the cavity of the fixed column 371. When the pressure on the left and right sides of the sealing plug 38 reaches equilibrium, the repulsive force between the permanent magnet and the circular magnet 331 causes the sealing plug 38 to slide to the left until it is located below the connecting hole 333, thereby preventing further gas from entering the cartridge through the connecting hole 332. Subsequently, inflation of the inflation channel 312 ceases. As the gas pressure in the connecting hole 333, the air passage 381, and the right side of the sealing plug 38 gradually decreases, the pressure differential drive switch 36 automatically closes. At this time, the telescopic column 373 of the pressure differential drive locking member 37 extends from the fixed column 371 and limits the rightward sliding of the sealing plug 38, preventing it from returning to its original position under the action of the high pressure inside the cartridge, thereby causing the high-pressure gas to leak through the connecting hole 332 and the connecting hole 333 (as shown in FIG. Figure 8 At the same time, the plug connector 61 on the other side of the cartridge housing 6 is inserted into the detection jack 211 and connected thereto. At this time, the barometer 22 can monitor the pressure changes inside the cartridge housing 6 in real time and determine whether the cartridge is airtight based on the pressure changes after a period of time.

[0050] After the test is complete, the inflation channel 312 is inflated again. The gas then enters the airway 381 and the right side of the sealing plug 38 through the connecting hole 333, again pressing the telescopic column 373 of the pressure-differential-driven locking member 37 back into the cavity of the fixed column 371. Because the inflation pressure is lower than the pressure inside the cartridge, the pressure on the left side of the sealing plug 38 is greater than the pressure on the right side. When the telescopic column 373 of the pressure-differential-driven locking member 37 no longer restricts the rightward sliding of the sealing plug 38, the sealing plug 38 begins to slide rightward under the pressure inside the cartridge. At this point, inflation is stopped, and the gas inside the injector is discharged through the communicating hole 332 and the connecting hole 333, thereby relieving the pressure. Simultaneously, some of the gas in the airway 381 enters the mounting hole 334 through the vent hole 335, causing the gas pressure in the airway 381 to be lower than the internal pressure of the fixed column 371. At this time, the telescopic column 373 is pushed back into the limiting hole 382 under the influence of the internal pressure of the fixed column 371, thus preventing the sealing plug 38 from sliding to the left after the communicating hole 332 and the connecting hole 333 are depressurized.

[0051] Although the embodiments of the present invention have been shown and described above, it will be appreciated that the above embodiments are illustrative only and are not to be construed as limiting the present invention.

Claims

1. A device for detecting air tightness of a blood perfusion device, comprising a base, a detection component, and an inflation component, wherein the detection component and the inflation component are located at the rear and front sides of the top of the base, respectively, and characterized in that: The inflation component includes a fixing seat and an inflation plug, the fixing seat is provided with an inflation socket extending along its front-to-back direction on one side near the detection component, an inflation channel penetrating the fixing seat is provided in the middle of the top of the inflation socket, the inflation plug is sleeved in the inflation socket and is coaxial with it, one end of the inflation plug is provided with a communicating hole coaxial with it and penetrating the inflation plug, the end of the inflation plug away from the detection component is fixedly installed with a circular magnet, the middle of the top of the communicating hole is provided with a connecting hole connected with the inflation channel, a sealing plug is slidably sleeved on the side of the communicating hole near the circular magnet, one end of the sealing plug near the circular magnet is a permanent magnet, and the magnetic properties of the two sides close to each other are the same, a mounting hole is provided on the inner wall of the side of the connecting hole near the circular magnet, an axis parallel to the axis of the inflation plug, a vent hole is provided between the side of the communicating hole near the circular magnet and the bottom of the mounting hole, and a pressure difference drive switch is installed on the inner wall of the mounting hole for controlling the on and off of the vent hole; An air channel is provided at the top of the sealing plug near the circular magnet, and a limiting hole is provided at the bottom of the air channel which passes through the sealing plug. The bottom of the vent is connected to the air channel, and a pressure difference driven locking part is fixedly installed at the bottom of the connecting hole near the circular magnet to limit the sliding of the sealing plug.

2. The airtightness detection device for a hemoperfusion device according to claim 1, characterized in that: The pressure difference driven switch includes a fixed rod fixedly installed in the mounting hole near one end of the circular magnet and having a hollow interior, a piston is slidably sleeved left and right in the cavity of the fixed rod, a telescopic rod is fixedly installed on the end of the piston away from the circular magnet, and high-pressure gas is filled between the other end of the piston and the cavity of the fixed rod, and a sealing block is fixedly installed after the end of the telescopic rod away from the circular magnet slides through the fixed rod, the outer wall of the sealing block conflicts with the inner wall of the mounting hole and the two are slidably connected, and the vent is located between the sealing block and the fixed rod.

3. The airtightness detection device for a hemoperfusion device according to claim 1, characterized in that: The pressure difference driven locking member includes a fixed column fixedly installed inside the inflatable plug column, with its axis parallel to the axis of the connecting hole and the interior being hollow. A plug block is slidably sleeved up and down in the cavity of the fixed column. A telescopic column is fixedly installed on the top of the plug block. The top end of the telescopic column slides through the fixed column and then extends into the limiting hole. High-pressure gas is filled between the bottom of the plug block and the cavity of the fixed column.

4. The airtightness detection device for a hemoperfusion device according to claim 1, characterized in that: The inflation plug is slidably connected to the inflation socket, and a reset magnet is fixedly installed on the end of the inflation socket away from the detection component. The reset magnet and the side of the circular magnet that are close to each other have the same magnetic properties. A second sealing member is fixedly sleeved on the inner wall of the other end of the inflation socket, and an inflation tube is installed on the top of the inflation channel.

5. The airtightness detection device for a hemoperfusion device according to claim 1, characterized in that: The detection assembly includes a sliding seat, which is parallel to the fixed seat and extends in the left and right directions of the base. A detection socket coaxial with the inflation socket is provided on the side of the sliding seat close to the fixed seat. A barometer is fixedly installed on the top of the sliding seat. The barometer corresponds to the detection socket, and the detection probe of the barometer extends into the detection socket.

6. The airtightness detection device for a hemoperfusion device according to claim 5, characterized in that: The internal sliding sleeve of the detection socket is connected with a sliding seal, and a sealing hole is opened at one end of the sliding seal, which is coaxial with the detection socket and passes through the sliding seal. The diameter of the sealing hole gradually decreases from one side close to the fixed seat to the other side, forming a conical structure. The inner wall of the end of the detection socket close to the fixed seat is fixedly sleeved with a first seal, and the other end of the detection socket is fixedly installed with a sealing magnet. The end of the sliding seal close to the sealing magnet is fixedly installed with a permanent magnet, and the permanent magnet and the sealing magnet have the same magnetic properties on the side close to each other.

7. The airtightness detection device for a hemoperfusion device according to claim 5, characterized in that: Driving members are fixedly installed on both left and right ends of the fixed seat, and are used to drive the sliding seat to slide towards the fixed seat.

8. The airtightness detection device for a hemoperfusion device according to claim 5, characterized in that: A fixing component is provided between the detection component and the inflation component, and the fixing component includes a mounting platform slidably mounted on the base, and clamping parts are installed on the front and rear sides of the top of the mounting platform, wherein the clamping part close to the inflation component is fixedly connected to the mounting platform, and the clamping part close to the detection component is slidably connected to the mounting platform, and a first telescopic part is installed between the two ends of the two clamping parts for adjusting the distance between the two clamping parts.

9. The airtightness detection device for a hemoperfusion device according to claim 8, characterized in that: The clamping member includes a lower clamping plate and an upper clamping plate extending in the left and right directions. A second telescopic member is installed between the two ends of the lower clamping plate and the upper clamping plate to drive the upper clamping plate to move up and down. A clamping groove is provided on the side where the lower clamping plate and the upper clamping plate are close to each other.

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