Air tightness detection device for hemoperfusion device

Abstract

The invention provides an air tightness detection device of a hemoperfusion device, and belongs to the technical field of hemoperfusion device air tightness detection.The air tightness detection device of the hemoperfusion device comprises an air inflation assembly, the air inflation assembly comprises a fixing base and an air inflation plug column, and an air inflation insertion hole with the axis extending in the front-back direction of the fixing base is formed in the side, close to the detection assembly, of the fixing base; an inflation channel penetrating through the fixed seat is formed in the middle of the top end of the inflation insertion hole, the inflation plug column is sleeved with the inflation insertion hole and is coaxial with the inflation insertion hole, a communication hole which is coaxial with the inflation plug column and penetrates through the inflation plug column is formed in one end of the inflation plug column, and a circular magnet is fixedly installed at the end, away from the detection assembly, of the inflation plug column; the side, close to the circular magnet, of the communicating hole is slidably sleeved with a sealing plug column, the end, close to the circular magnet, of the sealing plug column is a permanent magnet, and the sides, close to each other, of the sealing plug column and the circular magnet are the same in magnetism. The device can stably work in a high-pressure environment for a long time.

Description

Technical Field

[0001] The present invention belongs to the technical field of airtightness detection of hemoperfusion devices, and particularly relates to an airtightness detection device for a hemoperfusion device. Background Art

[0002] A hemoperfusion device is mainly applied to the adsorption of acute and chronic drug poisoning, middle molecule toxins in uremia, and pathogenic factors in the fields of liver diseases and immunity. It generally includes a cylinder for accommodating an adsorbent and end caps connected to both ends of the cylinder. Connectors are provided outside the end caps at both ends of the cylinder.

[0003] In a Chinese patent with the authorization announcement number CN114739599B, a sealing detection device for a hemoperfusion device is disclosed, which includes a base, a driving mechanism, a workpiece mounting table, and an air inflation mechanism; a first spring is provided at one end of the workpiece mounting table close to the fixed seat; a plurality of first insertion holes are provided on the sliding seat, and the first insertion holes can be inserted and matched with the connectors at one end of the hemoperfusion device. A plurality of barometers connected to each first insertion hole are provided on the sliding seat; a plurality of second insertion holes are provided on the fixed seat, and the second insertion holes can be inserted and matched with the connectors at the other end of the hemoperfusion device. The air inflation mechanism is used to inflate the hemoperfusion device.

[0004] When the existing detection device detects multiple hemoperfusion devices simultaneously, an air inflation pump is usually used to inflate multiple hemoperfusion devices. In order to prevent gas from flowing back, a one-way valve or a solenoid valve is usually provided on the air inflation branch pipe. At the same time, when a hemoperfusion device is not installed at some detection stations, in order to avoid high-pressure gas from entering the ventilation holes corresponding to these stations, an elastic piston valve is usually provided in the ventilation holes. However, the pressure during detection usually reaches 100 KPa, and the one-way valve, solenoid valve, or elastic piston valve is prone to failure under long-term high pressure, which may lead to the entire device being unusable. Even if valves with better performance are used to extend the service life of the detection device to a certain extent, it will also increase 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 hemoperfusion device, aiming to solve the problems in the prior art that the valves of the detection device are prone to failure due to long-term pressure bearing in a high-pressure environment, resulting in frequent failures of the detection device and an increase in cost.

[0006] To achieve the above object, the present invention provides the following technical solution: An airtightness detection device for a hemoperfusion cartridge, comprising a base, a detection component, and an inflation component. The detection component and the inflation component are respectively located at the rear side and the front side of the top of the base. The inflation component includes a fixed seat and an inflation plug column. On one side of the fixed seat close to the detection component, an inflation jack is provided with an axis extending along its front-rear direction. In the middle of the top end of the inflation jack, an inflation channel penetrating the fixed seat is provided. The inflation plug column is sleeved in the inflation jack and is coaxial with it. One end of the inflation plug column is provided with a communication hole coaxial with it and penetrating the inflation plug column. A circular magnet is fixedly installed at the end of the inflation plug column away from the detection component. In the middle of the top end of the communication hole, a connection hole communicating with the inflation channel is provided. A sealing plug column is slidably sleeved on the side of the communication hole close to the circular magnet. One 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. On the inner wall of the connection hole close to the circular magnet, a mounting hole with an axis parallel to the axis of the inflation plug column is provided. A ventilation hole is provided between the side of the communication hole close to the circular magnet and the bottom of the mounting hole. A differential pressure driving switch is installed on the inner wall of the mounting hole to control the on-off of the ventilation hole.

[0007] The beneficial effects of the present invention are as follows: By setting the sealing plug column, the differential pressure driving switch, and the circular magnet, when the inflation pressure reaches the pressure required for the detection of the hemoperfusion cartridge, the differential pressure driving switch is activated and opened, enabling the inflation gas to smoothly enter the right-side area of the sealing plug column through the ventilation hole. In this way, the gas pressures at both ends of the sealing plug column reach equilibrium. At this time, under the repulsive force between the circular magnet and the permanent magnet at the right end of the sealing plug column, the sealing plug column will slide to the left. When the sealing plug column slides to below the connection hole, the connection between the connection hole and the left end of the communication hole is effectively sealed by the sealing plug column, thereby preventing further inflation of the inner wall of the hemoperfusion cartridge and also ensuring that the gas inside the hemoperfusion cartridge cannot flow out. This design facilitates the airtightness detection of the hemoperfusion cartridge. In addition, this device does not use precision devices such as one-way valves and solenoid valves, so it can stably operate in a high-pressure environment for a long time, significantly improving the service life of the device.

[0008] The differential pressure driving switch includes a fixed rod fixedly installed at the end of the mounting hole close to the circular magnet and having a hollow interior. A piston is slidably sleeved in the cavity of the fixed rod. One end of the piston away from the circular magnet is fixedly installed with a telescopic rod. The other end of the piston and the cavity of the fixed rod are filled with high-pressure gas. One end of the telescopic rod away from the circular magnet slides through the fixed rod and is fixedly installed with a sealing block. The outer wall of the sealing block abuts against the inner wall of the mounting hole and is slidably connected therebetween. The ventilation hole is located at the position between the sealing block and the fixed rod.

[0009] On the top of one side of the sealing plug column close to the circular magnet, an air passage is provided. At the bottom of the air passage, a limiting hole penetrating the sealing plug column is provided. The bottom of the ventilation hole is communicated with the air passage. At the bottom of one side of the communication hole close to the circular magnet, a differential pressure-driven locking member is fixedly installed for restricting the sliding of the sealing plug column.

[0010] The differential pressure-driven locking member includes a fixed column fixedly installed inside the inflation plug column, with its axis parallel to the axis of the connection hole and hollow inside. A plug block is slidably sleeved up and down in the cavity of the fixed column. A telescopic column is fixedly installed at the top of the plug block. The top end of the telescopic column slides through the fixed column and 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 the differential pressure-driven locking member, this locking member can automatically restrict the left and right sliding of the sealing plug column according to the magnitude of the gas pressure in the air passage, thereby effectively controlling the air intake and exhaust processes of the perfusion device and ensuring the smooth progress of the airtightness detection of the perfusion device.

[0012] The inflation plug column is slidably connected to the inflation socket. A reset magnet is fixedly installed at one end of the inflation socket away from the detection component. The sides of the reset magnet and the circular magnet close to each other have the same magnetism. A second seal is fixedly sleeved on the inner wall of the other end of the inflation socket. An inflation pipe is installed at the top of the inflation passage.

[0013] The effect is that by setting the reset magnet and the circular magnet, the left and right sliding of the inflation plug column can be controlled. During the airtightness detection of the perfusion device, the inflation plug column slides to the right, making the connection hole align and communicate with the inflation passage, thus ensuring the normal inflation of the perfusion device. When there is no perfusion device at this station, the inflation plug column slides to the left under the repulsive force of the reset magnet and the circular magnet, making the connection hole no longer align and communicate with the inflation passage, and at this time inflation cannot be carried out.

[0014] The detection component includes a sliding seat. The sliding seat is parallel to the fixed seat and both extend along the left and right direction of the base. On one side of the sliding seat close to the fixed seat, a detection socket coaxial with the inflation socket is provided. 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] A sliding seal is slidably sleeved inside the detection socket. One end of the sliding seal is provided with a sealing hole coaxial with the detection socket and penetrating the sliding seal. The diameter of the sealing hole gradually decreases from the side close to the fixed seat to the other side, forming a conical structure. A first seal is fixedly sleeved on the inner wall of the end of the detection socket close to the fixed seat. A sealing magnet is fixedly installed at the other end of the detection socket. A permanent magnet is fixedly installed at one end of the sliding seal close to the sealing magnet, and the sides of the permanent magnet and the sealing magnet close to each other have the same magnetism.

[0016] The effect is that by setting the sliding seal, it can effectively prevent the gas inside the perfusion device from leaking through the detection jack during the airtightness detection of the perfusion device, thereby ensuring the accuracy of the airtightness detection result of the perfusion device.

[0017] Driving members are fixedly installed at both the 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 table slidably installed on the base. Clamping members are installed on both the front and rear sides of the top of the mounting table. Among them, the clamping member close to the inflation component is fixedly connected to the mounting table, and the clamping member close to the detection component is slidably connected to the mounting table. A first telescopic member is installed between the two ends of the two clamping members and is used to adjust the distance between the two clamping members.

[0019] The clamping member includes a lower clamping plate and an upper clamping plate extending in the left-right direction. Second telescopic members are installed between the two ends of the lower clamping plate and the upper clamping plate and are used to drive the upper clamping plate to move up and down. A plurality of clamping grooves extending in the left-right direction are respectively formed on the sides of the lower clamping plate and the upper clamping plate close to each other, and the plurality of clamping grooves respectively correspond to the plurality of detection jacks one by one.

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

[0021] Compared with the prior art, the beneficial effects of the present invention are: By setting the sealing plug column, differential pressure drive switch and circular magnet, when the inflation pressure reaches the pressure required for the detection of the perfusion device, the differential pressure drive switch is activated and opened, so that the inflation gas can smoothly enter the right region of the sealing plug column through the ventilation hole. In this way, the gas pressures at both ends of the sealing plug column reach balance. 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 column, the sealing plug column will slide to the left. When the sealing plug column slides to below the connection hole, the connection between the connection hole and the left end of the communication hole is effectively sealed by the sealing plug column, thereby preventing further inflation of the inner wall of the perfusion device and also ensuring that the gas inside the perfusion device cannot flow out. This design facilitates the airtightness detection of the perfusion device. In addition, this device does not use precision devices 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. Description of the Drawings

[0022] Figure 1 It is a three-dimensional structural schematic diagram of the detection device in the present invention; Figure 2 It is a top view schematic diagram of the detection device in the present invention during detection; Figure 3This is a top view schematic diagram of the detection device in the present invention when it is not in use; Figure 4 This is a front view sectional schematic diagram of the detection device in the present invention when it is not in use; Figure 5 This is a top view sectional schematic diagram of the detection device in the present invention when it is detecting; Figure 6 This is a side view sectional schematic diagram of the detection device in the present invention when it is detecting inflation; Figure 7 This is a side view sectional schematic diagram of the fixing base in the present invention when inflation ends; Figure 8 This is a side view sectional schematic diagram of the fixing base in the present invention when it is detecting; Figure 9 This is the present invention Figure 7 The enlarged structural schematic diagram of part A in the present invention.

[0023] In the figure: 1. Base; 11. Guide chute; 12. Installation groove; 121. Card slot; 2. Detection component; 21. Sliding seat; 211. Detection jack; 212. Guide slider; 22. Barometer; 23. Sliding seal; 231. Sealing hole; 24. Sealing magnet; 25. First seal; 3. Inflation component; 31. Fixing base; 311. Inflation jack; 312. Inflation channel; 32. Inflation pipe; 33. Inflation plug column; 331. Circular magnet; 332. Communication hole; 333. Connection hole; 334. Installation hole; 335. Ventilation hole; 34. Reset magnet; 35. Second seal; 36. Differential pressure drive switch; 361. Fixed rod; 362. Piston; 363. Sealing block; 364. Expansion rod; 37. Differential pressure drive locking part; 371. Fixed column; 372. Plug block; 373. Expansion column; 38. Sealing plug column; 381. Air duct; 382. Limit hole; 4. Driving part; 5. Fixing component; 51. Installation table; 511. Limit chute; 512. Clamping plate; 52. Clamping part; 521. Lower clamping plate; 522. Upper clamping plate; 523. Clamping groove; 524. Limit slider; 525. Second expansion part; 53. First expansion part; 6. Perfusion device housing; 61. Plug connector. Detailed implementation manners

[0024] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention.

[0025] Please refer to Figures 1 - 9, the present invention provides the following technical solution: An airtightness detection device for a hemoperfusion cartridge, comprising a base 1, a detection component 2, an inflation component 3, a driving component 4, and a fixing component 5. The detection component 2 is installed at the rear side of the top of the base 1 and can slide along the front-rear direction of the base 1; the inflation component 3 is fixedly installed at the front side of the top 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-rear direction of the base 1. There are two driving components 4, which are respectively fixedly installed on the left and right sides of the inflation component 3 and are used to drive the detection component 2 to move towards the inflation component 3. When performing airtightness detection, first, the hemoperfusion cartridge housing 6 is clamped and fixed by the fixing component 5 to ensure that the socket joints 61 at both ends of the hemoperfusion cartridge housing 6 respectively point to the detection component 2 and the inflation component 3. Then, the driving component 4 is started to drive the detection component 2 to move towards the inflation component 3. When the detection component 2 moves into contact with the hemoperfusion cartridge housing 6, it will drive the hemoperfusion cartridge housing 6 and the fixing component 5 to move towards the inflation component 3 together until the socket joints 61 at both ends of the hemoperfusion cartridge housing 6 are respectively inserted into the detection component 2 and the inflation component 3.

[0026] Reference Figure 2 As shown, the detection component 2 includes a sliding seat 21, a barometer 22, a sliding seal 23, a sealing magnet 24, and a first seal 25. Guide sliding grooves 11 extending along its front-rear direction are respectively opened on the left and right sides of the top of the base 1. The sliding seat 21 extends along the left-right direction, and guide sliding blocks 212 are fixedly installed at both ends of its bottom. These guide sliding blocks 212 are slidably sleeved in the guide sliding grooves 11, thereby playing a guiding role during the movement of the detection component 2 towards the inflation component 3.

[0027] Reference Figure 5 and Figure 6 As shown, at least one detection socket 211 is opened in the middle of the side of the sliding seat 21 close to the inflation component 3. When the number of detection sockets 211 is multiple, these detection sockets 211 are evenly distributed along the left-right direction of the sliding seat 21, and the axis of each detection socket 211 extends along the front-rear direction. The barometers 22, the sliding seals 23, the sealing magnets 24, and the first seals 25 are all in one-to-one correspondence with the 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.

[0028] The sliding seal 23 is sleeved in the detection jack 211 in a sliding manner in the front-rear direction, and the sliding seal 23 is a cylindrical seal coaxial with the detection jack 211. One end of the sliding seal 23 is provided with a sealing hole 231 that is coaxial with the detection jack 211 and penetrates through the sliding seal 23. The diameter of the sealing hole 231 gradually decreases from the side close to the inflation assembly 3 to the other side, forming a conical structure. The first seal 25 is fixedly sleeved on the inner wall of one end of the detection jack 211 close to the inflation assembly 3. The sealing magnet 24 is fixedly installed at the other end of the detection jack 211. A permanent magnet is fixedly installed at one end of the sliding seal 23 close to the sealing magnet 24, and the sides of the permanent magnet and the sealing magnet 24 close to each other have the same magnetic property, forming a repulsive force. As the sliding seat 21 slides towards the inflation assembly 3, the plug 61 of the perfusion device is inserted into the detection jack 211. After the plug 61 contacts the sealing hole 231, it pushes the sliding seal 23 to slide. When high-pressure gas is filled into the perfusion device, the gas flows through the plug 61 and into the sealing hole 231 and then 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 61, thereby forming a seal to prevent gas leakage from the perfusion device during detection.

[0029] Reference Figures 5 - 9 As shown, the inflation assembly 3 includes a fixed seat 31, an inflation pipe 32, an inflation plug 33, a return magnet 34, a second seal 35, a differential pressure drive switch 36, a differential pressure drive locking member 37, and a sealing plug 38. At least one inflation jack 311 is provided in the middle of one side of the fixed seat 31 close to the sliding seat 21. When the number of inflation jacks 311 is multiple, these inflation jacks 311 are evenly distributed in the left-right direction of the fixed seat 31, and the axis of each inflation jack 311 extends in the front-rear direction. Each inflation jack 311 is coaxial with and in one-to-one correspondence with a detection jack 211. Specifically, each inflation jack 311 is internally provided with an inflation plug 33, a return magnet 34, a second seal 35, a differential pressure drive switch 36, a differential pressure drive locking member 37, and a sealing plug 38. In addition, an inflation channel 312 penetrating through the fixed seat 31 is provided in the middle of the top end of each inflation jack 311, and the inflation pipe 32 is connected to all the inflation channels 312 for filling high-pressure gas into these inflation channels 312.

[0030] Reference Figure 7As shown, the inflatable plug post 33 is slidably sleeved in the inflatable jack 311 and is coaxial with it. A circular magnet 331 is fixedly installed at one end of the inflatable plug post 33 away from the detection component 2. A communication hole 332 that is coaxial with and penetrates the whole of the inflatable plug post 33 is provided at the other end of the inflatable plug post 33. A connection hole 333 communicating with the inflatable channel 312 is further provided in the middle of the top end of the communication hole 332. The reset magnet 34 is fixedly installed in the inflatable jack 311 and is located at one end away from the sliding seat 21. The sides of the reset magnet 34 and the circular magnet 331 that are close to each other have the same magnetism, so a repulsive force will be generated between them. The second seal 35 is fixedly installed on the inner wall of the other end of the inflatable jack 311.

[0031] When the plug connector 61 of the perfusion device is inserted into the inflatable jack 311, the plug connector 61 will push the inflatable plug post 33 to slide along the jack. As the inflatable plug post 33 slides, the connection hole 333 on it will be aligned and communicated with the inflatable channel 312, thereby allowing gas to pass through and inflate the perfusion device. After the detection is completed, the plug connector 61 is pulled out from the inflatable jack 311. At this time, the reset magnet 34 will use the repulsive force between it and the circular magnet 331 to push the inflatable plug post 33 to reset. After resetting, the inflatable channel 312 is closed by the inflatable plug post 33, so inflation cannot be carried out anymore.

[0032] Reference Figure 9 As shown, a sealing plug post 38 is slidably sleeved on the side of the communication hole 332 close to the circular magnet 331. One end of the sealing plug post 38 close to the circular magnet 331 is a permanent magnet, and the sides of this permanent magnet and the circular magnet 331 that are close to each other have the same magnetism, forming a repulsive force. An installation hole 334 with an axis parallel to the axis of the inflatable plug post 33 is provided on the inner wall of the connection hole 333 close to the circular magnet 331. A ventilation hole 335 is also provided between the side of the communication hole 332 close to the circular magnet 331 and the bottom of the installation hole 334. A differential pressure drive switch 36 is installed on the inner wall of the installation hole 334, and this switch is used to control the on-off state of the ventilation hole 335.

[0033] The differential pressure driven switch 36 includes a fixed rod 361 fixedly installed at one end of the mounting hole 334 close to the circular magnet 331, and the inside of the fixed rod 361 is hollow. In the cavity of the fixed rod 361, a piston 362 is sleeved and slidable left and right. One end of the piston 362 away from the circular magnet 331 is fixedly connected with a telescopic rod 364, and a high-pressure gas is filled between the other end of the piston 362 and the cavity of the fixed rod 361, and the pressure of the high-pressure gas is set to be equal to or slightly smaller than the pressure of the gas inside the perfusion device during detection. After one end of the telescopic rod 364 away from the circular magnet 331 slidably penetrates the fixed rod 361, a sealing block 363 is fixedly installed. 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 should be noted that the ventilation hole 335 is exactly located at the position between the sealing block 363 and the fixed rod 361.

[0034] During inflation, when the internal pressure of the perfusion device reaches the required pressure value for detection, at this time, the sealing block 363 will drive the telescopic rod 364 and the piston 362 to slide to the right side of the fixed rod 361 under the pressure of the high-pressure gas in the connection hole 333. When the sealing block 363 moves to the right side of the ventilation hole 335, the ventilation hole 335 and the connection hole 333 will be connected, and at this time, the high-pressure gas will enter the right side area of the sealing plug column 38 through the ventilation hole 335, so that the pressures on both sides of the sealing plug column 38 reach balance. Under the repulsive force between the permanent magnet and the circular magnet 331, the sealing plug column 38 will slide to the left. When the sealing plug column 38 is located below the connection hole 333, the gas will no longer be able to enter the perfusion device through the communication hole 332, and at this time, the inflation process stops. As the gas pressure in the connection hole 333 gradually decreases, the sealing block 363 will reset under the pressure of the high-pressure gas in the fixed rod 361, and further make the ventilation hole 335 and the connection hole 333 no longer connected.

[0035] An air passage 381 is opened at the top of one side of the sealing plug column 38 close to the circular magnet 331, and a limiting hole 382 penetrating the sealing plug column 38 is provided at the bottom of the air passage 381. The bottom of the ventilation hole 335 is connected with the air passage 381. The differential pressure driven locking member 37 is fixedly installed at the bottom of one side of the communication hole 332 close to the circular magnet 331. The differential pressure driven locking member 37 includes: a fixed column 371 fixedly installed inside the inflation plug column 33 and whose axis is parallel to the axis of the connection hole 333, and the inside of the fixed column 371 is hollow. In the cavity of the fixed column 371, a plug block 372 is sleeved and slidable up and down. A telescopic column 373 is fixedly installed at the top of the plug block 372, and the top end of the telescopic column 373 slidably penetrates the fixed column 371 and extends into the limiting hole 382. A high-pressure gas is filled between the bottom of the plug block 372 and the cavity of the fixed column 371, and the pressure of the high-pressure gas is less than the pressure of the high-pressure gas in the fixed rod 361.

[0036] After the vent hole 335 is in communication with the connection hole 333, the high-pressure gas in the connection hole 333 at this time enters the air passage 381 and the right region of the sealing plug column 38. Since the pressure inside the fixed column 371 is less than the pressure inside the fixed rod 361, the high-pressure gas entering the air passage 381 can press the telescopic column 373 located in the limiting hole 382 back into the cavity of the fixed column 371. At this time, the telescopic column 373 no longer hinders the sliding of the sealing plug column 38. When the sealing plug column 38 slides below the connection hole 333, the high-pressure gas in the air passage 381 and the right region of the sealing plug column 38 is discharged through the connection hole 333 and the inflation passage 312. Subsequently, the telescopic column 373 is reset under the pressure of the high-pressure gas inside the fixed column 371 and limits the rightward sliding of the sealing plug column 38, thereby preventing it from resetting under the high pressure inside the perfusion device and further causing the high-pressure gas inside the perfusion device to leak through the communication hole 332 and the connection hole 333.

[0037] Reference Figure 3 and Figure 4 As shown in the reference and, a mounting groove 12 is formed in the middle of the top end of the base 1, and clamping grooves 121 extending in the front-rear direction are formed on the left and right side walls of the mounting groove 12. The mounting table 51 in the fixing assembly 5 is slidably mounted in the mounting groove 12, and clamping plates 512 extending in the front-rear direction are fixedly mounted on the left and right side walls of the mounting table 51, and these clamping plates 512 are slidably sleeved in the corresponding clamping grooves 121. Clamping members 52 are mounted on the front and rear sides of the top of the mounting table 51. Among them, the clamping member 52 close to the inflation assembly 3 is fixedly connected to the mounting table 51, while the clamping member 52 close to the detection assembly 2 is slidably connected to the mounting table 51. A first telescopic member 53 is mounted between the two ends of the two clamping members 52 for adjusting the distance between the two clamping members 52. In addition, limiting sliding grooves 511 are formed on the left and right sides of the top of the mounting table 51, and limiting sliding blocks 524 are slidably mounted inside these two limiting sliding grooves 511, and the top of the limiting sliding block 524 is fixedly connected to the bottom end of the clamping member 52 slidably mounted on the mounting table 51.

[0038] The clamping member 52 includes a lower clamping plate 521 and an upper clamping plate 522 extending in the left-right direction. Second telescopic members 525 are mounted between the two ends of the lower clamping plate 521 and the upper clamping plate 522, and these second telescopic members 525 are used to drive the upper clamping plate 522 to move up and down. At least one clamping groove 523 is formed on the side of the lower clamping plate 521 and the upper clamping plate 522 close to each other. When the number of the 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 the detection jacks 211 and corresponds to each other one by one. The shape of the clamping groove 523 is semi-circular. Therefore, when the two 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.

[0039] The implementation principle of the embodiment of the present invention is as follows: When detecting the perfusion device, first fix the perfusion device housing 6 on the fixing component 5 in sequence. Subsequently, start the driving member 4 to drive the sliding seat 21 to slide towards the fixing seat 31. When the sliding seat 21 contacts the perfusion device housing 6, the sliding seat 21 will drive the perfusion device housing 6 and the fixing component 5 to slide towards the fixing seat 31 together. When the perfusion device housing 6 is in full contact with the fixing seat 31, control the driving member 4 to stop working. At this time, the plug connector 61 on the perfusion device housing 6 has been inserted into the inflation jack 311, and pushes the inflation plug column 33 to slide in the jack, so that the connection hole 333 on the inflation plug column 33 is aligned with and communicated with the inflation channel 312.

[0040] Inflate the inflation channel 312 through an air pump, and the gas then enters the interior of the perfusion device through the connection hole 333 and the communication hole 332. When the pressure inside the perfusion device reaches the required pressure value for detection, the differential pressure driven switch 36 is activated and opened, so that the ventilation hole 335 is communicated with the connection hole 333. At this time, the high-pressure gas enters the air duct 381 and the right side area of the sealing plug column 38 through the ventilation hole 335. The action of the high-pressure gas presses the telescopic column 373 of the differential pressure driven locking member 37 located in the limit hole 382 back into the cavity of the fixed column 371. When the pressures on both sides of the sealing plug column 38 reach an equilibrium state, under the repulsive force between the permanent magnet and the circular magnet 331, the sealing plug column 38 will slide to the left until it is located below the connection hole 333, thereby preventing the gas from continuing to enter the interior of the perfusion device through the communication hole 332. Subsequently, stop inflating the inflation channel 312. As the gas pressure in the connection hole 333, the air duct 381, and the right side area of the sealing plug column 38 gradually decreases, the differential pressure driven switch 36 automatically closes. At this time, the telescopic column 373 of the differential pressure driven locking member 37 extends out of the fixed column 371 and limits the rightward sliding of the sealing plug column 38 to prevent it from resetting under the action of the high pressure inside the perfusion device, thereby causing the high-pressure gas to leak through the communication hole 332 and the connection hole 333 (as Figure 8 shown). At the same time, the plug connector 61 on the other side of the perfusion device housing 6 is inserted into the detection jack 211 and communicated with it. At this time, the barometer 22 can monitor the pressure change inside the perfusion device housing 6 in real time, and judge whether the airtightness of the perfusion device is qualified through the pressure change after a period of time.

[0041] After the detection is completed, the inflation channel 312 is inflated again. The gas then enters the airway 381 and the right region of the sealing plug column 38 through the connection hole 333, and presses the telescopic column 373 of the differential pressure driven locking member 37 back into the cavity of the fixed column 371 again. Since the inflation pressure this time is less than the pressure inside the perfusion device, the pressure on the left side of the sealing plug column 38 is greater than the pressure on its right side. When the telescopic column 373 of the differential pressure driven locking member 37 no longer limits the rightward sliding of the sealing plug column 38, the sealing plug column 38 begins to slide to the right under the action of the pressure inside the perfusion device. At this time, the inflation is stopped, and the gas inside the perfusion device is discharged through the communication hole 332 and the connection hole 333 for pressure relief. At the same time, since part of the gas in the airway 381 enters the mounting hole 334 through the ventilation hole 335, the gas pressure in the airway 381 is less 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 internal pressure of the fixed column 371, preventing the sealing plug column 38 from sliding to the left after the communication hole 332 and the connection hole 333 are depressurized.

[0042] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention.

Claims

1. An airtightness detection device for a hemoperfusion cartridge, comprising a base (1), a detection component (2) and an inflation component (3). The detection component (2) and the inflation component (3) are respectively located at the rear side and the front side of the top of the base (1), and are characterized in that, The inflation assembly (3) includes a fixed seat (31) and an inflation plug column (33). On one side of the fixed seat (31) close to the detection assembly (2), an inflation jack (311) with an axis extending along its front-rear direction is provided. In the middle of the top end of the inflation jack (311), an inflation passage (312) penetrating the fixed seat (31) is provided. The inflation plug column (33) is sleeved in the inflation jack (311) and is coaxial with it. One end of the inflation plug column (33) is provided with a communication hole (332) that is coaxial with it and penetrates the inflation plug column (33). A circular magnet (331) is fixedly installed at the end of the inflation plug column (33) away from the detection assembly (2). In the middle of the top end of the communication hole (332), a connection hole (333) communicating with the inflation passage (312) is provided. A sealing plug column (38) is slidably sleeved on one side of the communication hole (332) close to the circular magnet (331). One end of the sealing plug column (38) close to the circular magnet (331) is a permanent magnet, and the magnetic properties of the two sides close to each other are the same. On the inner wall of one side of the connection hole (333) close to the circular magnet (331), a mounting hole (334) with an axis parallel to the axis of the inflation plug column (33) is provided. A ventilation hole (335) is provided between one side of the communication hole (332) close to the circular magnet (331) and the bottom of the mounting hole (334). A differential pressure driving switch (36) is installed on the inner wall of the mounting hole (334) to control the on-off of the ventilation hole (335).

2. The airtightness detection device for a hemoperfusion cartridge according to claim 1, wherein: The differential pressure driving switch (36) includes a hollow fixed rod (361) fixedly installed at one end of the mounting hole (334) close to the circular magnet (331). A piston (362) is slidably sleeved left and right in the cavity of the fixed rod (361). One end of the piston (362) away from the circular magnet (331) is fixedly installed with a telescopic rod (364). A high-pressure gas is filled between the other end of the piston (362) and the cavity of the fixed rod (361). One end of the telescopic rod (364) away from the circular magnet (331) slidably penetrates the fixed rod (361) and is fixedly installed with a sealing block (363). The outer wall of the sealing block (363) abuts against the inner wall of the mounting hole (334) and is slidably connected therebetween. The ventilation hole (335) is located at the position between the sealing block (363) and the fixed rod (361).

3. The airtightness detection device for a hemoperfusion cartridge according to claim 2, characterized in that: On the top of one side of the sealing plug column (38) close to the circular magnet (331), an air passage (381) is provided. At the bottom of the air passage (381), a limiting hole (382) penetrating the sealing plug column (38) is provided. The bottom of the ventilation hole (335) is communicated with the air passage (381). A differential pressure driving locking part (37) is fixedly installed at the bottom of one side of the communication hole (332) close to the circular magnet (331) to limit the sliding of the sealing plug column (38).

4. The airtightness detection device for a hemoperfusion cartridge according to claim 3, characterized in that: The differential pressure-driven locking member (37) includes a fixed column (371) fixedly installed inside the inflatable plug column (33) with its axis parallel to the axis of the connection hole (333) and hollow inside. A plug block (372) is slidably sleeved up and down in the cavity of the fixed column (371). A telescopic column (373) is fixedly installed at the top of the plug block (372). The top end of the telescopic column (373) slidably penetrates through the fixed column (371) and extends into the limit hole (382). A high-pressure gas is filled between the bottom of the plug block (372) and the cavity of the fixed column (371).

5. The airtightness detection device for a hemoperfusion cartridge according to claim 1, characterized in that: The inflatable plug column (33) is slidably connected to the inflatable jack (311). A reset magnet (34) is fixedly installed at one end of the inflatable jack (311) away from the detection component (2). The sides of the reset magnet (34) and the circular magnet (331) close to each other have the same magnetism. A second seal (35) is fixedly sleeved on the inner wall of the other end of the inflatable jack (311). An inflatable tube (32) is installed at the top of the inflatable channel (312).

6. The airtightness detection device for a hemoperfusion cartridge according to claim 1, wherein: The detection component (2) includes a sliding seat (21). The sliding seat (21) is parallel to the fixed seat (31) and both extend along the left-right direction of the base (1). A detection jack (211) coaxial with the inflatable jack (311) is opened on the side of the sliding seat (21) close to the fixed seat (31). A barometer (22) is fixedly installed at the top of the sliding seat (21). The barometer (22) corresponds to the detection jack (211), and the detection probe of the barometer (22) extends into the detection jack (211).

7. An airtightness detection device for a hemoperfusion cartridge according to claim 6, characterized in that: A sliding seal (23) is slidably sleeved inside the detection jack (211). A sealing hole (231) coaxial with the detection jack (211) and penetrating through the sliding seal (23) is opened at one end of the sliding seal (23). The diameter of the sealing hole (231) gradually decreases from the side close to the fixed seat (31) to the other side, forming a conical structure. A first seal (25) is fixedly sleeved on the inner wall of the end of the detection jack (211) close to the fixed seat (31). A sealing magnet (24) is fixedly installed at the other end of the detection jack (211). A permanent magnet is fixedly installed at the end of the sliding seal (23) close to the sealing magnet (24), and the sides of the permanent magnet and the sealing magnet (24) close to each other have the same magnetism.

8. The airtightness detection device of a hemoperfusion cartridge according to claim 6, characterized in that: Driving members (4) are fixedly installed at both the left and right ends of the fixed seat (31) for driving the sliding seat (21) to slide towards the fixed seat (31).

9. The airtightness detection device of a hemoperfusion cartridge according to claim 6, characterized in that: A fixing component (5) is provided between the detection component (2) and the inflation component (3). The fixing component (5) includes a mounting table (51) slidably mounted on the base (1). Clamping members (52) are mounted on both the front and rear sides of the top of the mounting table (51). Among them, the clamping member (52) close to the inflation component (3) is fixedly connected to the mounting table (51), and the clamping member (52) close to the detection component (2) is slidably connected to the mounting table (51). A first telescopic member (53) is mounted between the two ends of the two clamping members (52) for adjusting the distance between the two clamping members (52).

10. The airtightness detection device for a hemoperfusion cartridge according to claim 9, wherein: The clamping member (52) includes a lower clamping plate (521) and an upper clamping plate (522) extending in the left-right direction. Second telescopic members (525) are mounted between the two ends of the lower clamping plate (521) and the upper clamping plate (522) for driving the upper clamping plate (522) to move up and down. Clamping grooves (523) are formed on the sides of the lower clamping plate (521) and the upper clamping plate (522) close to each other.

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