A device for detecting the sealing performance of extracorporeal blood circulation pipeline

Abstract

The present invention relates to the technical field of pipeline sealing detection, and specifically to a blood extracorporeal circulation pipeline sealing detection device, comprising a detection tube, two movable rods are inserted into the top outer wall of the detection tube, clamping mechanisms are provided on both sides of the detection tube, two partitions are welded to the inner wall of the detection tube, each partition is provided with a pressure transmission mechanism, a compressed air strip is welded to the top outer wall of each movable rod, and the inner wall of the detection tube is connected to two reciprocating circular plates by sliding. When the present invention detects the sealing of the blood extracorporeal circulation pipeline, the pipeline can be directly inserted into the corresponding rubber clamping tube platform, and the handle is rotated to stably clamp the pipeline, and the compressed air strip is repeatedly pressed to continuously inflate the pipeline. For the blood extracorporeal circulation pipeline with good sealing performance, the compressed air strip cannot be continuously pressed repeatedly, so the sealing performance of the blood extracorporeal circulation pipeline can be quickly identified.

Description

Technical Field

[0001] The present invention relates to the technical field of pipeline sealing detection, and in particular to a device for detecting the sealing performance of an extracorporeal blood circulation pipeline. Background Art

[0002] Extracorporeal blood circulation is a life-support technology that uses artificial tubes to connect the body's major blood vessels to an artificial heart-lung machine. Venous blood is drawn from the venous system, oxygenated outside the body, and then returned to the arterial system via a blood pump. It uses a series of specialized artificial devices to remove the returning venous blood, manually exchange gases, regulate its temperature, and filter it before returning it to the body's arterial system. The entire circulation process relies on extracorporeal blood circulation tubing to establish circulation, and high requirements are placed on the sealing of the extracorporeal blood circulation tubing. For leak testing of extracorporeal blood circulation tubing, the most common method is to circulate physiological saline to determine its sealing. This testing method has the following problems: 1. The operation is cumbersome and cannot directly test the tubing's sealing. It relies too much on additional water circulation for continuous testing, which is time-consuming and labor-intensive. 2. It is difficult to effectively distinguish between highly leaky and less leaky tubing that can be circulated with water. Because extracorporeal blood circulation tubing also requires oxygenation, it is difficult to effectively test the tubing's sealing strength. Summary of the Invention

[0003] The purpose of the present invention is to solve the problems in the background technology and to propose a blood extracorporeal circulation pipeline sealing detection device.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] The cam is connected to the top of the detection tube by the two said movable rods, and the two sides of the detection tube are connected with the movable rods by the two said movable rods.

[0006] In the above-mentioned blood extracorporeal circulation pipeline sealing detection device, the clamping mechanism includes a fastening ring and four transmission clamping mechanisms, and the four transmission clamping mechanisms are equidistantly distributed circumferentially on the outer wall of one side of the detection tube. The fastening ring is connected to the outer wall of one side of the detection tube by rotation. The inner wall of the fastening ring is provided with four grooves at equal intervals, and each groove corresponds one-to-one to the transmission clamping mechanism. Four rotating handles are bonded to the outer peripheral wall of the fastening ring, and the four rotating handles are equidistantly distributed circumferentially on the outside of the fastening ring.

[0007] In the above-mentioned blood extracorporeal circulation pipeline sealing detection device, the transmission clamp mechanism includes a slide post 1, a slide post 2, a stop block and a curved clamp strip. The slide post 1 and the slide post 2 are both welded to the outer wall of one side of the detection tube, and the stop block is bonded and fixed to the inner wall of the corresponding bar groove. An arc bar sliding hole is opened inside the curved clamp strip, and the slide post 1 and the slide post 2 are both inserted into the corresponding arc bar sliding hole. The stop block is in contact with the curved clamp strip, and the curved clamp strip can pass through the corresponding bar groove.

[0008] In the above-mentioned blood extracorporeal circulation pipeline sealing detection device, the pressure transmission mechanism includes a limit frame and a pressure transmitter, the pressure transmitter is inserted into the inside of the partition, the pressure transmitter is welded by a hollow cylinder and a circular plate, a plurality of pressure holes are opened inside the cylindrical wall of the pressure transmitter, a pressure equalizing groove is opened on the outer wall of the partition away from the reciprocating circular plate, and a plurality of springs are fixed between the circular plate-shaped side wall of the pressure transmitter and the inner wall of the pressure equalizing groove.

[0009] In the above-mentioned blood extracorporeal circulation pipeline sealing detection device, the limit frame is movably inserted into the inside of the detection tube, and the limit frame passes through the detection tube and extends to the outside of the detection tube. A release hole is opened in the center of the limit frame, and a flat pressure strip is welded on the top outer wall of the limit frame, and a bent pressure strip is welded on the bottom outer wall of the limit frame.

[0010] In the above-mentioned blood extracorporeal circulation pipeline sealing detection device, rubber clamping tube platforms are bonded to both sides of the inner wall of the detection tube, and the rubber clamping tube platforms are located on the side of the partition away from the reciprocating circular plate. A reset spring is fixed between the bottom outer wall of the two air compression strips and the top outer wall of the detection tube, and the reset spring is sleeved on the outside of the two active rods. A number of connecting holes are opened on the top of the detection tube, and the opening positions of the several connecting holes are all located between the two reciprocating circular plates.

[0011] In the above-mentioned blood extracorporeal circulation pipeline sealing detection device, the observation mechanism includes a sleeve column, an I-shaped column counterweight block and a ball head rod. The sleeve column is fixedly inserted into the top outer wall of the detection tube, a movable groove is opened inside the sleeve column, and the I-shaped column counterweight block is movably inserted into the inside of the movable groove. An inner groove is opened at the bottom of the I-shaped column counterweight block, and the ball head rod is movably inserted into the inside of the inner groove and passes through it.

[0012] In the above-mentioned blood extracorporeal circulation pipeline sealing detection device, a circular hole and a plurality of pressure inlet holes are opened on the outer wall of the bottom of the sleeve, and the plurality of pressure inlet holes are distributed in a circle with equal intervals at the bottom of the sleeve, and a plurality of anti-blocking through holes are opened on the top of the sleeve.

[0013] Compared with existing technologies, the advantages of this blood extracorporeal circulation pipeline sealing detection device are:

[0014] 1. When testing the tightness of the extracorporeal blood circulation tubing, you can directly insert the tubing into the corresponding rubber clamping tube platform, turn the handle to stably clamp the tubing, and repeatedly press the air pressure bar to continuously inflate the tubing. For tubing with good tightness, the air pressure bar will not be able to be repeatedly pressed, which can quickly identify the good tightness of the extracorporeal blood circulation tubing;

[0015] 2. When testing blood extracorporeal circulation tubing with poor or low sealing, the air-pressure strip can be pressed to drive the I-shaped column counterweight for detailed observation. Since the blood extracorporeal circulation tubing with low sealing will have a certain degree of sealing, but after inflation, the internal high pressure state will gradually be lost, and the counterweight will move down, which can accurately judge whether the tubing is low-sealing or high-sealing;

[0016] 3. The sealing performance of the device itself can be simply judged by a lightweight ball-end rod, ensuring that the device itself is airtight and can accurately test the sealing performance of the extracorporeal blood circulation pipeline. In addition, when measuring the sealing performance of the pipeline, the movement of the I-shaped column counterweight can be directly detected, which enhances the device's detection performance of the pipeline.

[0017] 4. This device can be simply adjusted to meet the needs of air tightness detection. The air tightness detection of the one-way pipeline or the entire pipeline can be controlled by simply adjusting the limit frame. The release hole and the pressure regulator can be misaligned by adjusting the limit frames on both sides to seal both sides of the detection tube. Whether the inflation effect of the device is normal can be further detected by pressing the air pressure bar, so that the device itself has good self-detection performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0019] Figure 2 It is a schematic diagram of the overall cross-sectional three-dimensional structure of the present invention;

[0020] Figure 3 yes Figure 2 Enlarged view of point A in the middle;

[0021] Figure 4 yes Figure 2 Enlarged view of point B in the middle;

[0022] Figure 5 It is a schematic diagram of the connection between the movable rod and the reciprocating circular plate in the present invention;

[0023] Figure 6 It is a structural schematic diagram of the pressure transmission mechanism in the present invention;

[0024] Figure 7 It is a side partial structural schematic diagram of the present invention;

[0025] Figure 8 yes Figure 7 Enlarged view of point C in the middle;

[0026] Figure 9 It is a structural schematic diagram of the fastening ring in the present invention;

[0027] Figure 10 This is a schematic diagram of the rubber clamping tube platform structure of the present invention;

[0028] Figure 11 It is a schematic cross-sectional structural diagram of the observation mechanism of the present invention.

[0029] In the figure: 1. Detection tube; 3. Fastening ring; 4. Connecting hole; 5. Return spring; 6. Air pressure strip; 7. Flat pressure strip; 9. Bending pressure strip; 10. Active rod; 11. Limiting frame; 12. Partition; 13. Pressure device; 14. Transmission strip; 15. Plastic bending strip; 16. One-way movable plate; 17. Turning handle; 18. Reciprocating circular plate; 19. Balanced pressure groove; 20. Spring; 21. Pressure hole; 22. Active groove; 23. Ball head rod; 24. Inner groove; 25. Sleeve column; 26. I-shaped column counterweight; 27. Clamping hole; 28. Release hole; 29. ​​Abutment; 30. Bending strip; 31. Round hole; 32. Rubber clamping tube platform; 34. Arc bar sliding hole; 35. Sliding column one; 36. Sliding column two; 38. Strip groove; 39. Pressure inlet hole; 40. Anti-blocking through hole. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0031] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0032] Reference Figures 1-11 A device for detecting the sealing performance of an extracorporeal blood circulation pipeline comprises a detection tube 1. Two movable rods 10 are inserted into the top outer wall of the detection tube 1. Clamping mechanisms are provided on both sides of the detection tube 1. Two partitions 12 are welded to the inner wall of the detection tube 1. Each partition 12 is provided with a pressure transmission mechanism. A pressure strip 6 is welded to the top outer wall of each movable rod 10. Two reciprocating circular plates 18 are connected to the inner wall of the detection tube 1 through sliding connection. The two reciprocating circular plates 18 are symmetrically arranged facing each other. The bottom of each movable rod 10 is connected to a transmission strip 14 through a hinge. And two transmission bars 14 are symmetrically arranged inside the detection tube 1, each transmission bar 14 corresponds to the reciprocating circular plate 18 one by one, and the outer wall of the reciprocating circular plate 18 close to the movable rod 10 is connected to the corresponding transmission bar 14 through a hinge. A card hole 27 is opened on the inner wall of the reciprocating circular plate 18, and four plastic bent bars 15 are inserted into the card hole 27. The outer wall of the same side of the four plastic bent bars 15 is bonded with a one-way movable plate 16. An observation mechanism is provided at the top of the detection tube 1, and the observation mechanism is located on the side of the partition 12 away from the reciprocating circular plate 18.

[0033] The above-mentioned plastic bent strip 15 is further explained as follows: the plastic bent strip 15 has a certain flexibility, and its purpose is to enable the one-way movable plate 16 to always fit closely to one side wall of the reciprocating circular plate 18 when the one-way movable plate 16 is not subjected to force and is stationary, or when the two one-way movable plates 16 are subjected to a force moving toward the center, the flexible plastic bent strip 15 can enable the one-way movable plate 16 to always fit closely to one side wall of the reciprocating circular plate 18, thereby ensuring that the one-way movable plate 16 and the reciprocating circular plate 18 form an isolated space as a whole; and when the two one-way movable plates 16 are subjected to a force moving apart on both sides, the flexible plastic bent strip 15 will also gather toward the center as the one-way movable plate 16 is subjected to the force, and the one-way movable plate 16 will also separate from the reciprocating circular plate 18 and a gap will appear, which will not isolate the space on both sides of the reciprocating circular plate 18.

[0034] Specifically, when the active rod 10 moves downward, the corresponding reciprocating circular plate 18 can be pushed by the hinged transmission bar 14, so that the reciprocating circular plate 18 can move directly in the direction close to the partition 12, and the one-way movable plate 16 in the middle will not move. The one-way movable plate 16 is tightly fitted with the reciprocating circular plate 18 and squeezes the air on the other side of the reciprocating circular plate 18 to apply pressure to the pressure transmission mechanism; when the active rod 10 moves upward, the reciprocating circular plate 18 is moved in the direction away from the partition 12 in the same way. Since the reciprocating circular plate 18 and the pressure transmission mechanism on the corresponding side remain in a closed state, the movement of the reciprocating circular plate 18 will reduce the pressure in the enclosed space, and the external atmospheric pressure will push the one-way movable plate 16, causing it to move relative to the reciprocating circular plate 18 in the direction close to the pressure transmission mechanism, so that the reciprocating circular plate 18 and the one-way movable plate 16 are no longer fitted, so that the reciprocating motion can achieve the effect of pressing the air pressure bar 6 to inflate both sides of the detection tube 1.

[0035] The clamping mechanism includes a fastening ring 3 and four transmission clamping mechanisms. The four transmission clamping mechanisms are equidistantly distributed on the outer wall of one side of the detection tube 1. The fastening ring 3 is connected to the outer wall of one side of the detection tube 1 by rotation. The inner wall of the fastening ring 3 is provided with four grooves 38 at equal intervals, and each groove 38 corresponds to the transmission clamping mechanism one by one. The outer peripheral wall of the fastening ring 3 is bonded with four rotating handles 17, and the four rotating handles 17 are equidistantly distributed on the outside of the fastening ring 3. Among them, the transmission clamping mechanism includes a sliding column 1 35, a sliding column 2 36, and a stop block. 29 and the curved clamp 30, the slide post 1 35 and the slide post 2 36 are all welded to the outer wall of one side of the detection tube 1, the block 29 is bonded and fixed to the inner wall of the corresponding strip groove 38, the interior of the curved clamp 30 is provided with an arc strip sliding hole 34, the slide post 1 35 and the slide post 2 36 are all inserted into the corresponding arc strip sliding hole 34, the block 29 is aligned with the outer wall of one side of the curved clamp 30, and the curved clamp 30 can pass through the corresponding strip groove 38, wherein the clamping contact pipe portion of the curved clamp 30 is made of rubber material to increase the clamping friction.

[0036] Specifically, the handle 17 on the outside of the fastening ring 3 is rotated clockwise, and the four blocks 29 on the inner wall of the fastening ring 3 are rotated. The blocks 29 push the corresponding contact curved clamping strips 30 to move. Since the movement of the curved clamping strips 30 is restricted by the sliding column 1 35 and the sliding column 2 36, the curved clamping strips 30 will move inward and approach the pipeline to be clamped until it contacts the pipeline for clamping, so that the detection tube 1 will not fall off when pressure is applied to the pipeline, and the extracorporeal blood circulation pipeline will not be separated from the rubber clamping tube platform 32.

[0037] The pressure transmission mechanism includes a limit frame 11 and a pressure transmitter 13. The pressure transmitter 13 is inserted into the interior of the partition 12. The pressure transmitter 13 is welded by a hollow cylinder and a circular plate. A number of pressure holes 21 are opened inside the cylindrical wall of the pressure transmitter 13. A pressure-equalizing groove 19 is opened on the outer wall of the partition 12 away from the reciprocating circular plate 18. A number of springs 20 are fixed between the circular plate side wall of the pressure transmitter 13 and the inner wall of the pressure-equalizing groove 19.

[0038] Specifically, when the side of the pressure-passing device 13 close to the reciprocating circular plate 18 is subjected to force, the pressure-passing device 13 will be pushed to move toward the side close to the extracorporeal blood circulation pipeline, the internal spring 20 will be extended, and the circular plate position of the pressure-passing device 13 will be separated from the equalizing pressure groove 19. The hollow cylindrical hole, the pressure-passing hole 21, the equalizing pressure groove 19 and the separated circular plate position of the pressure-passing device 13 will form a connected state, so that when the reciprocating circular plate 18 moves toward the direction close to the partition 12, it can squeeze air into the extracorporeal blood circulation pipeline, thereby facilitating the air tightness detection of the entire extracorporeal blood circulation pipeline.

[0039] The limit frame 11 is movably inserted into the interior of the detection tube 1, and the limit frame 11 passes through the detection tube 1 and extends to the outside of the detection tube 1. A release hole 28 is opened in the center of the limit frame 11, and a flat pressure strip 7 is welded to the top outer wall of the limit frame 11, and a bent pressure strip 9 is welded to the bottom outer wall of the limit frame 11.

[0040] The above-mentioned limit frame 11 is further explained: when the flat pressure strip 7 is fully pressed to make it fit tightly against the top outer wall of the detection tube 1, the release hole 28 in the center of the limit frame 11 can allow the pressure device 13 to pass through, and the limit frame 11 will not limit the pressure device 13; when the bent pressure strip 9 is fully pressed to make it fit tightly against the bottom outer wall of the detection tube 1, the release hole 28 in the center of the limit frame 11 is misaligned with the pressure device 13, and the pressure device 13 will not move even if it is subjected to external force. The purpose of this design is to make simple adjustments when testing different external extracorporeal blood circulation pipelines. When only one end of a one-way or non-detachable pipeline is tested, During the test, after pressing the bent pressure strip 9 on the limit frame 11 farthest from the observation mechanism, the partition 12 and the pressure device 13 fitted with the limit frame 11 form an isolated and closed state. After that, the extracorporeal blood circulation pipeline is tested by repeatedly pressing the air pressure strip 6 closest to the observation mechanism, thereby enhancing the flexible detection performance of the device. When the release holes 28 of the limit frames 11 on both sides are misaligned with the corresponding pressure devices 13, the inflation effect of the test tube 1 itself is tested in advance by whether the two air pressure strips 6 can be pressed. If the two air pressure strips 6 cannot be pressed, it indicates that the test performance of the detection device is good.

[0041] Rubber clamping tube platforms 32 are bonded to both sides of the inner wall of the detection tube 1. The rubber clamping tube platforms 32 are located on the side of the partition 12 away from the reciprocating circular plate 18. A return spring 5 is fixed between the bottom outer wall of the two air compression strips 6 and the top outer wall of the detection tube 1, and the return spring 5 is sleeved on the outside of the two active rods 10. A number of connecting holes 4 are opened on the top of the detection tube 1, and the opening positions of the several connecting holes 4 are all located between the two reciprocating circular plates 18. The connecting holes 4 are used to balance the air pressure between the two reciprocating circular plates 18. The return spring 5 is used to restore the top air compression strip 6 to its initial state to provide the effect of repeated pressing.

[0042] The above-mentioned rubber clamping tube platform 32 is further explained as follows: the structure of the rubber clamping tube platform 32 is a frustum, and a through hole for inserting the extracorporeal blood circulation tube is provided in the center. Its purpose is to fix tubes of different diameters. Moreover, when the outer circumferential wall of the rubber clamping tube platform 32 is under pressure, the shape design makes the deformation of the rubber clamping tube platform 32 closely fit the sleeved tube without deforming outward and causing relative displacement of the tube.

[0043] The observation mechanism includes a sleeve column 25, an I-shaped column counterweight 26 and a ball head rod 23. The sleeve column 25 is fixedly inserted into the top outer wall of the detection tube 1. A movable groove 22 is provided inside the sleeve column 25. The I-shaped column counterweight 26 is movably inserted into the inside of the movable groove 22. An inner groove 24 is provided at the bottom of the I-shaped column counterweight 26. The ball head rod 23 is movably inserted into the inside of the inner groove 24 and passes through it. The ball head rod 23 is a lightweight plastic rod-shaped structure and can move in the inner groove 24.

[0044] Specifically, whether the ball head bar 23 pops up every time as the air pressure bar 6 moves downward, if it does not pop up, it means that the air tightness of the device itself is poor. This is because the ball head bar 23 itself has a small mass and will pop out when subjected to a simple air pressure shock. The effect of its popping up depends on whether the air tightness of the device itself is good.

[0045] A circular hole 31 and a plurality of pressure inlet holes 39 are provided on the outer wall of the bottom of the sleeve 25, and the plurality of pressure inlet holes 39 are distributed circumferentially at equal intervals at the bottom of the sleeve 25. A plurality of anti-clogging through holes 40 are provided on the top of the sleeve 25 so that the I-shaped column counterweight 26 can rise stably when pressure is applied to the bottom. The radius of the circular hole 31, the circumferential radius of the inner groove 24 and the radius of the cylindrical bottom of the ball head rod 23 are all consistent, so that when the entire observation mechanism is in a stationary state, the circular hole 31 and the inner groove 24 form a whole, further allowing the ball head rod 23 to slide freely in the circular hole 31 and the inner groove 24 when subjected to force. The radius of the bottom of the ball head rod 23 and the bottom surface of the I-shaped column counterweight 26 are consistent with the radius of the movable groove 22, so that the cylindrical circumferential wall below the I-shaped column counterweight 26 can fit tightly against the inner circumferential wall of the movable groove 22.

[0046] The specific working principle and method of use of the present invention are explained in detail below: Before use, first press the bent pressure strip 9 below until it fits with the bottom outer wall of the detection tube 1, press the two air-pressing strips 6, and check whether the inflation effect of the detection tube 1 is good. After that, the blood extracorporeal circulation pipeline is correspondingly plugged into the rubber clamp tube pass 32 inside the detection tube 1, and rotate the fastening ring 3 to make the corresponding bent clamp 30 contract and clamp the blood extracorporeal circulation pipeline, and then repeatedly press the two air-pressing strips 6 to move the reciprocating circular plate 18 toward the direction close to the partition 12 to squeeze the plugged and fixed blood extracorporeal circulation pipeline to inflate, until it is inflated to the point where the air-pressing strip 6 cannot be pressed. At this time, continue to press the air-pressing strip 6 to observe the moving state of the I-shaped column counterweight 26 to quickly perform blood The specific observation method for the sealing test of the liquid extracorporeal circulation pipeline is: repeatedly press the air pressure bar 6 to make the reciprocating circular plate 18 and the one-way movable plate 16 repeatedly inflate the inside of the extracorporeal circulation pipeline of the blood. At this time, the pressing force of the air pressure bar 6 suddenly increases. At this time, continue to press the air pressure bar 6 until the I-shaped column counterweight 26 pops out of the sleeve column 25, and the ball head rod 23 also rises to the highest point from the I-shaped column counterweight 26. At this time, hold the air pressure bar 6 and the detection tube 1 for five to three seconds, and observe whether the I-shaped column counterweight 26 and the ball head rod 23 move downward. If they do not move downward, it indicates that the sealing of the extracorporeal circulation pipeline of the blood is good. If the I-shaped column counterweight 26 moves or gradually moves downward, it indicates that the sealing of the extracorporeal circulation pipeline of the blood is not good.

[0047] It is further explained that the above-mentioned fixed connection should be understood in a broad sense unless otherwise clearly specified and limited. For example, it can be welding, gluing, or one-piece molding, etc., which are common means well known to those skilled in the art.

[0048] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A device for detecting the sealing performance of an extracorporeal blood circulation pipeline, comprising a detection tube (1), characterized in that: Two movable rods (10) are inserted into the outer wall of the top of the detection tube (1), and clamping mechanisms are provided on both sides of the detection tube (1). Two partitions (12) are welded to the inner wall of the detection tube (1), and each partition (12) is provided with a pressure transmission mechanism. A pressure strip (6) is welded to the outer wall of the top of each movable rod (10). Two reciprocating circular plates (18) are connected to the inner wall of the detection tube (1) by sliding, and the two reciprocating circular plates (18) are symmetrically arranged facing each other. The bottom of each movable rod (10) is connected to a transmission strip (14) by a hinge, and the two transmission strips (14) are symmetrically arranged inside the detection tube (1). The transmission bars (14) correspond to the reciprocating circular plates (18) one by one, the outer wall of the reciprocating circular plate (18) close to the movable rod (10) is connected to the corresponding transmission bar (14) through a hinge, the inner wall of the reciprocating circular plate (18) is provided with a clamping hole (27), four plastic bending bars (15) are inserted into the clamping hole (27), and a one-way movable plate (16) is bonded to the outer wall of the same side of the four plastic bending bars (15), an observation mechanism is provided on the top of the detection tube (1), and the observation mechanism is located on the side of the partition (12) away from the reciprocating circular plate (18), and a plurality of connection holes (4) are provided on the top of the detection tube (1); The pressure transmission mechanism includes a limit frame (11) and a pressure transmitter (13). The pressure transmitter (13) is inserted into the interior of the partition (12). The pressure transmitter (13) is formed by welding a hollow cylinder and a circular plate. A plurality of pressure holes (21) are opened inside the cylindrical wall of the pressure transmitter (13).

2. The device for detecting the sealing performance of an extracorporeal blood circulation circuit according to claim 1, characterized in that: The clamping mechanism comprises a fastening ring (3) and four transmission clamping mechanisms, wherein the four transmission clamping mechanisms are circumferentially distributed at equal intervals on one side outer wall of the detection tube (1), the fastening ring (3) is connected to the outer wall of one side of the detection tube (1) by rotation, the inner wall of the fastening ring (3) is provided with four grooves (38) at equal intervals, and each groove (38) corresponds to the transmission clamping mechanism one by one, and the outer peripheral wall of the fastening ring (3) is bonded with four rotating handles (17), and the four rotating handles (17) are circumferentially distributed at equal intervals on the outside of the fastening ring (3).

3. The device for detecting the sealing performance of an extracorporeal blood circulation circuit according to claim 2, characterized in that: The transmission clamp mechanism includes a slide post 1 (35), a slide post 2 (36), a stopper (29) and a curved clamp strip (30), wherein the slide post 1 (35) and the slide post 2 (36) are welded to the outer wall of one side of the detection tube (1), the stopper (29) is bonded and fixed to the inner wall of the corresponding strip groove (38), an arc strip sliding hole (34) is provided inside the curved clamp strip (30), the slide post 1 (35) and the slide post 2 (36) are plugged into the corresponding arc strip sliding hole (34), the stopper (29) is aligned with the outer wall of one side of the curved clamp strip (30), and the curved clamp strip (30) can pass through the corresponding strip groove (38).

4. The device for detecting the sealing performance of an extracorporeal blood circulation circuit according to claim 1, characterized in that: A pressure-equalizing groove (19) is provided on the outer wall of the partition (12) away from the reciprocating circular plate (18), and a plurality of springs (20) are fixed between the circular plate-shaped side wall of the pressure-passing device (13) and the inner wall of the pressure-equalizing groove (19).

5. The device for detecting the sealing performance of an extracorporeal blood circulation pipeline according to claim 4, characterized in that: The limiting frame (11) is movably inserted into the interior of the detection tube (1), and the limiting frame (11) passes through the detection tube (1) and extends to the outside of the detection tube (1). A release hole (28) is provided in the center of the limiting frame (11). A flat pressure strip (7) is welded to the top outer wall of the limiting frame (11), and a curved pressure strip (9) is welded to the bottom outer wall of the limiting frame (11).

6. The device for detecting the sealing performance of an extracorporeal blood circulation circuit according to claim 1, characterized in that: Both sides of the inner wall of the detection tube (1) are bonded with rubber clamping tube platforms (32), and the rubber clamping tube platforms (32) are located on the side of the partition (12) away from the reciprocating circular plate (18). A return spring (5) is fixed between the bottom outer wall of the two compressed air strips (6) and the top outer wall of the detection tube (1), and the return spring (5) is sleeved on the outside of the two active rods (10), and the opening positions of the plurality of connection holes (4) are all located between the two reciprocating circular plates (18).

7. The device for detecting the sealing performance of an extracorporeal blood circulation circuit according to claim 1, characterized in that: The observation mechanism comprises a sleeve column (25), an I-shaped column counterweight (26) and a ball head rod (23), wherein the sleeve column (25) is fixedly inserted into the top outer wall of the detection tube (1), a movable groove (22) is provided inside the sleeve column (25), the I-shaped column counterweight (26) is movably inserted into the inside of the movable groove (22), an inner groove (24) is provided at the bottom of the I-shaped column counterweight (26), and the ball head rod (23) is movably inserted into the inside of the inner groove (24) and passes through.

8. The device for detecting the sealing performance of an extracorporeal blood circulation circuit according to claim 7, characterized in that: The outer wall of the bottom of the sleeve column (25) is provided with a circular hole (31) and a plurality of pressure inlet holes (39), and the plurality of pressure inlet holes (39) are distributed in a circumferential manner at equal intervals on the bottom of the sleeve column (25). The top of the sleeve column (25) is provided with a plurality of anti-blocking through holes (40).

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