Device for measuring tensile fracture of medical silica gel catheter

Abstract

The invention provides a tensile fracture measuring device for a medical silica gel catheter, and relates to the technical field of medical instrument detection. The tensile fracture measuring device for the medical silica gel catheter comprises a bottom plate, a measuring box, observation glass and three tension sensors, the measuring box is fixedly installed at the top of the bottom plate, a first opening is formed in one side of the measuring box, the observation glass is rotatably installed on one side of the measuring box, and the three tension sensors are arranged in the measuring box. The three tension sensors are arranged in the measuring box, a rotating cylinder is rotationally mounted in the measuring box, the top end of the rotating cylinder extends out of the measuring box, and a guide pipe fixing structure is arranged on the rotating cylinder. The tensile fracture measuring device for the medical silica gel catheter has the advantages of being convenient to use, capable of conducting tensile fracture testing on a plurality of catheters at the same time, free of one-by-one operation, capable of automatically pulling out the fractured catheters from the clamp and free of manual pulling out of workers.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical instrument detection, and in particular to a device for measuring the tensile rupture of medical silicone catheters. BACKGROUND

[0002] The device for measuring the tensile rupture of medical silicone catheters is a professional detection equipment specially used for evaluating the anti-rupture performance of medical silicone catheters under the combined action of tension and internal pressure, and is widely used in medical instrument quality control, research and development verification and other links to ensure the safety and reliability of the catheter when subjected to tension and internal medium pressure in clinical use (such as infusion, drainage, interventional therapy and other scenarios).

[0003] The conventional device for measuring the tensile rupture of medical silicone catheters can only test one catheter at a time when measuring the tensile rupture of medical silicone catheters, and needs to be repeatedly assembled, disassembled and adjusted when batch testing, which is time-consuming, and needs to fix the two ends of the catheter one by one, which is repetitive and time-consuming, increases the labor intensity, and may also cause the catheter to fall off during testing due to insecure clamping of the two ends of the medical catheter.

[0004] Therefore, it is necessary to provide a device for measuring the tensile rupture of medical silicone catheters to solve the above technical problems. SUMMARY

[0005] The technical problem solved by the present application is to provide a device for measuring the tensile rupture of medical silicone catheters, which is convenient to use, can simultaneously test multiple catheters, does not need to be operated one by one, can automatically pull out the ruptured catheter from the clamp, and does not need to be manually pulled out by the staff.

[0006] To solve the above technical problems, the device for measuring the tensile rupture of medical silicone catheters provided by the present application comprises a bottom plate, a measuring box, an observation glass and three tension sensors, the measuring box is fixedly installed on the top of the bottom plate, one side of the measuring box is provided with a first opening, the observation glass is rotatably installed on one side of the measuring box, the three tension sensors are all arranged in the measuring box, a rotating cylinder is rotatably installed in the measuring box, the top end of the rotating cylinder extends out of the measuring box, a catheter fixing structure is arranged on the rotating cylinder, the catheter fixing structure comprises a stretching assembly and three catheter clamping assemblies, the stretching assembly is used for stretching the catheter, the catheter clamping assemblies are used for clamping the two ends of the catheter, a first gear is fixedly installed on the outer wall of the rotating cylinder, a first motor is fixedly installed on the top of the measuring box, the output shaft of the first motor extends into the measuring box and is fixedly installed with a third gear, and the third gear is engaged with the first gear.

[0007] Preferably, the stretching assembly comprises a second motor, a first screw rod, a sleeve and three first connecting frames, the second motor is fixedly installed at the top end of the rotating cylinder, the first screw rod is rotatably installed in the rotating cylinder, the output shaft of the second motor extends into the rotating cylinder and is fixedly connected with the first screw rod, the sleeve is threadedly connected on the first screw rod, and the three first connecting frames are fixedly installed on the outer wall of the sleeve and are rotationally symmetrically distributed at an angle of 120 degrees.

[0008] Preferably, any one of the pipe clamping assemblies comprises a toothed plate, a fixed seat, a moving seat, a circular ring clamping seat, two pipe sleeve seats, a second screw rod and a second gear, the toothed plate is fixedly installed on the inner wall of the top of the measuring box, a flange fixing cylinder is fixedly installed on the outer wall of the rotating cylinder, the fixed end of the tension sensor is fixedly installed at the bottom of the flange fixing cylinder, a second connecting frame is slidably installed at the bottom of the flange fixing cylinder, the force receiving end of the tension sensor is fixedly connected with the second connecting frame, the fixed seat is fixedly installed in the second connecting frame, the moving seat is fixedly installed in one of the first connecting frames, the two pipe sleeve seats are fixedly installed at the ends of the fixed seat and the moving seat that are close to each other, the two ends of the silica gel pipe are sleeved outside the two pipe sleeve seats, a support plate is fixedly installed on the outer wall of the fixed seat and the moving seat, a second screw rod is rotatably installed on each of the two support plates, a circular ring clamping seat is threadedly connected outside each of the two second screw rods, the circular ring clamping seat is sleeved outside the silica gel pipe, the same telescopic guide rod is fixedly installed on the two support plates, and the two circular ring clamping seats are slidably installed on the telescopic guide rod. The second gear is fixedly installed at the top end of one of the second screw rods.

[0009] Preferably, the third gear is an incomplete gear, only part of the circumference is toothed, and the rest is a smooth arc.

[0010] Preferably, blind holes are formed in the two second screw rods, limit grooves are formed at the two sides of the blind holes, and the same limit strip is slidably installed in the two blind holes. Two guide strips are fixedly installed on the outer wall of the limit strip, and the guide strips are matched with the limit grooves.

[0011] Preferably, a second opening is formed in the left side of the measuring box, a baffle is arranged in the second opening, two guide sliding seats are fixedly installed on one side of the measuring box, and a pipe pulling structure is arranged in the two guide sliding seats. The pipe pulling structure is used to pull off the broken pipe from the pipe sleeve seat, and a locking assembly is further arranged in the pipe pulling structure and used to limit the movement of the pipe pulling structure.

[0012] Preferably, the pipe pulling structure comprises a sliding plate, a double-bar connecting arm, two U-shaped fixing plates, two catheter clamping seats and a limiting button, the sliding plate is slidingly installed in the two guide sliding seats, the double-bar connecting arm is fixedly installed on one side of the sliding plate close to the measuring box, the two U-shaped fixing plates are both fixedly installed on the double-bar connecting arm, the two catheter clamping seats are both fixedly installed in the two U-shaped fixing plates, and a plurality of anti-skid strips are fixedly installed on the inner walls of the two catheter clamping seats.

[0013] Preferably, the locking assembly comprises a limiting button and a first spring, the guide sliding seat is provided with two positioning holes, one side of the sliding plate close to the positioning holes is provided with a sliding groove, the limiting button is slidingly installed in the sliding groove, and the first spring is arranged in the sliding groove and fixedly connected with the limiting button and the sliding plate at two ends.

[0014] Preferably, the top of the bottom plate is fixedly installed with a water collecting box, the outer wall of the rotating cylinder is sleeved with a lifting plate, the inner wall of the measuring box is slidingly installed with a T-shaped connecting plate, one end of the T-shaped connecting plate is fixedly connected with the lifting plate, the bottom of the lifting plate is fixedly installed with a second spring, the other end of the second spring is fixedly connected with the measuring box, the lifting plate is provided with three groups of liquid injection assemblies, the liquid injection assemblies are used for injecting liquid at the same time when being stretched, can simulate the state of the catheter under the dual action of stress and internal fluid pressure, the bottom inner wall of the measuring box is provided with two drainage grooves, and the side of the measuring box close to the water collecting box is fixedly installed with two drainage pipes in communication with the two drainage grooves.

[0015] Preferably, any one of the liquid injection assemblies comprises a water pumping pipe, a water pump, a water supply seat, a sealing joint and a connecting seat, the water supply seat is fixedly installed on the top of the lifting plate, the water pump is fixedly installed in the water supply seat, one end of the water pumping pipe is fixedly installed at the water inlet end of the water pump, the other end of the water pumping pipe extends into the water collecting box, the sealing joint is slidingly and sealingly installed in the water supply seat, the outer wall of the sealing joint is provided with a plurality of sealing rings, the connecting seat is fixedly installed at the bottom of the moving seat, the bottom of the connecting seat is provided with a first mounting hole, a second magnet is fixedly installed in the first mounting hole, a second mounting hole is formed in the sealing joint and fixedly installed with a first magnet, the first magnet cooperates with the second magnet, a first water outlet hole is formed in the water supply seat, the water outlet end of the water pump is fixedly connected with the first water outlet hole, a tapered water outlet hole is formed in the sealing joint, a second water outlet hole is formed in the catheter sleeve seat, and a third water outlet hole is formed in the moving seat, and the first water outlet hole, the tapered water outlet hole, the second water outlet hole and the third water outlet hole are in communication.

[0016] Compared with the related art, the device for medical silicone catheter tensile rupture determination has the following beneficial effects:

[0017] The device for medical silicone catheter tensile rupture determination provided by the application has the following beneficial effects:

[0018] The device for medical silicone catheter tensile rupture determination provided by the application has the following beneficial effects:

[0019] The device for medical silicone catheter tensile rupture determination provided by the application has the following beneficial effects: BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 The device for medical silicone catheter tensile rupture determination provided by the application has the following beneficial effects:

[0021] Figure 2 The device for medical silicone catheter tensile rupture determination provided by the application has the following beneficial effects: Figure 1 The device for medical silicone catheter tensile rupture determination provided by the application has the following beneficial effects:

[0022] Figure 3 The device for medical silicone catheter tensile rupture determination provided by the application has the following beneficial effects: Figure 2 The device for medical silicone catheter tensile rupture determination provided by the application has the following beneficial effects:

[0023] Figure 4 The device for medical silicone catheter tensile rupture determination provided by the application has the following beneficial effects: Figure 3 The device for medical silicone catheter tensile rupture determination provided by the application has the following beneficial effects:

[0024] The device for medical silicone catheter tensile rupture determination provided by the application has the following beneficial effects:Figure 5 for Figure 4 A schematic cross-sectional view of the rotating cylinder and the first gear shown;

[0025] Figure 6 for Figure 4 The schematic diagram of the assembly of the first screw, the movable seat, the annular holder and the second screw is shown;

[0026] Figure 7 for Figure 6 A schematic cross-sectional view of the fixed seat, movable seat, second screw and annular holder;

[0027] Figure 8 for Figure 6 The structural assembly intention of the fixing base, second connecting frame and tension sensor shown;

[0028] Figure 9 for Figure 7 The schematic cross-sectional view of the second screw and the limiting strip after separation is shown;

[0029] Figure 10 A schematic diagram of a second embodiment of the device for measuring the tensile rupture of a medical silicone catheter provided by the present invention;

[0030] Figure 11 for Figure 10 A schematic diagram of another perspective after the partial structure shown is separated;

[0031] Figure 12 for Figure 11 Schematic diagram of part of the structure shown;

[0032] Figure 13 for Figure 11 A schematic cross-sectional view of the structure including the sliding plate, guide slide and limiting button shown;

[0033] Figure 14 A schematic diagram of a third embodiment of a device for measuring the tensile rupture of a medical silicone catheter provided by the present invention;

[0034] Figure 15 for Figure 14 Schematic cross-sectional view of the measuring box and water collecting tank shown;

[0035] Figure 16 for Figure 14 Another perspective diagram of the partial structure shown;

[0036] Figure 17 for Figure 16 Schematic diagram of part of the structure shown;

[0037] Figure 18 for Figure 16 A schematic cross-sectional view of a portion of the structure shown;

[0038] Figure 19 for Figure 15 Assembled view of the water supply base and sealing joint and the like structure is shown in the cross section view;

[0039] Figure 20 for Figure 16 Assembled view of the water supply base, moving base, conduit sleeve base and sealing joint and the like structure is shown.

[0040] Reference numerals in the figure: 1, base plate; 2, measuring box; 3, first motor; 4, second motor; 5, observation glass; 6, tension sensor; 7, silica gel conduit; 8, rotating cylinder; 9, first screw rod; 10, ring clamping base; 11, moving base; 12, telescopic guide rod; 13, fixed base; 14, first gear; 15, second screw rod; 16, toothed plate; 17, second gear; 18, third gear; 19, sleeve; 20, limiting strip; 21, conduit sleeve base; 22, guide sliding base; 23, limiting button; 24, sliding plate; 25, double-rod connecting arm; 26, baffle; 27, conduit clamping base; 28, U-shaped fixed plate; 29, anti-skid strip; 30, first spring; 31, water collecting box; 32, drain pipe; 33, water supply base; 34, water suction pipe; 35, lifting plate; 36, second spring; 37, water pump; 38, first magnet; 39, sealing joint; 40, connecting base; 41, second magnet; 42, first connecting frame; 43, second connecting frame. DETAILED DESCRIPTION

[0041] The application will be further described below in conjunction with the drawings and embodiments.

[0042] First embodiment:

[0043] Please see Figures 1-9In the first embodiment of the present application, the device for medical silicone catheter tensile rupture test comprises a base plate 1, a test box 2, an observation glass 5 and three tension sensors 6. The test box 2 is fixedly installed on the top of the base plate 1. The test box 2 is provided with a first opening on one side. The observation glass 5 is rotatably installed on one side of the test box 2. The three tension sensors 6 are all arranged in the test box 2. A rotating cylinder 8 is rotatably installed in the test box 2. The top end of the rotating cylinder 8 extends out of the test box 2. The rotating cylinder 8 is provided with a catheter fixing structure. The catheter fixing structure comprises a stretching assembly and three catheter clamping assemblies. The stretching assembly is used for stretching the catheter. The catheter clamping assemblies are used for clamping the two ends of the catheter. A first gear 14 is fixedly installed on the outer wall of the rotating cylinder 8. A first motor 3 is fixedly installed on the top of the test box 2. The output shaft of the first motor 3 extends into the test box 2 and is fixedly installed with a third gear 18. The third gear 18 is engaged with the first gear 14. When the first motor 3 is started, the output shaft of the first motor 3 drives the third gear 18 to rotate. Since the third gear 18 is an incomplete gear, when it is engaged with the first gear 14, it drives the rotating cylinder 8 to rotate, thereby achieving the switching of the catheter clamping assemblies. Each time the rotating cylinder 8 rotates by one hundred and twenty degrees, the third gear 18 drives the rotating cylinder 8 to rotate clockwise intermittently through the first gear 14.

[0044] The stretching assembly comprises a second motor 4, a first screw rod 9, a sleeve 19 and three first connecting frames 42. The second motor 4 is fixedly installed on the top end of the rotating cylinder 8. The first screw rod 9 is rotatably installed in the rotating cylinder 8. The output shaft of the second motor 4 extends into the rotating cylinder 8 and is fixedly connected with the first screw rod 9. The sleeve 19 is threadedly connected on the first screw rod 9. The three first connecting frames 42 are all fixedly installed on the outer wall of the sleeve 19. The three first connecting frames 42 are one hundred and twenty degrees rotationally symmetrical. When the second motor 4 is started, the second motor 4 drives the first screw rod 9 to rotate, so that the sleeve 19 moves axially along the first screw rod 9. Through the first connecting frame 42, the moving seat 11 is driven away from the fixed seat 13, so as to stretch the silicone catheter 7. During the stretching process, the tension sensor 6 at the top end of the fixed seat 13 monitors the tension of the catheter in real time until the catheter is broken, and the maximum tension value is recorded.

[0045] Any one set of guide tube clamping assembly comprises toothed plate 16, fixed seat 13, moving seat 11, circular ring clamping seat 10, two guide tube sleeve seats 21, second screw 15 and second gear 17, toothed plate 16 is fixedly installed on the top inner wall of measuring box 2, the outer wall of rotating cylinder 8 is fixedly installed with flange fixing cylinder, the fixed end of tension sensor 6 is fixedly installed at the bottom of flange fixing cylinder, the bottom of flange fixing cylinder is slidably installed with second connecting frame 43, the force receiving end of tension sensor 6 is fixedly connected with second connecting frame 43, the top of second connecting frame 43 is fixedly installed with two limiting guide rods, both limiting guide rods penetrate flange fixing cylinder, both limiting guide rods can ensure coaxiality of tension, avoid that the direction of tension is inconsistent with the axis of sensor, produce eccentric load phenomenon, ensure that coaxial tension can avoid measurement error caused by eccentric load, fixed seat 13 is fixedly installed in second connecting frame 43, moving seat 11 is fixedly installed in one of first connecting frames 42, two guide tube sleeve seats 21 are fixedly installed at the ends close to each other of fixed seat 13 and moving seat 11 respectively, both ends of silica gel guide tube 7 are sleeved outside two guide tube sleeve seats 21 respectively, both outer walls of fixed seat 13 and moving seat 11 are fixedly installed with support plates, both second screw 15 are rotatably installed on both support plates, both outer sides of two second screw 15 are threadedly connected with circular ring clamping seat 10, circular ring clamping seat 10 is sleeved outside silica gel guide tube 7, one same telescopic guide rod 12 is fixedly installed on both support plates, the telescopic guide rod 12 comprises two main rods and one auxiliary rod, the auxiliary rod is slidably arranged in the two main rods, both circular ring clamping seats 10 are slidably installed on telescopic guide rod 12, and second gear 17 is fixedly installed at the top end of one of second screw 15.

[0046] The third gear 18 is an incomplete gear, only part of the circumference has teeth, and the rest is a smooth arc. Since the third gear 18 is an incomplete gear, it drives the rotating cylinder 8 to rotate when it meshes with the first gear 14, achieving the switching of the guide tube clamping assembly. Each rotation is 120 degrees.

[0047] Both second screw 15 are provided with blind holes, and the two sides of the blind hole are provided with limiting grooves. A same limiting strip 20 is slidably installed in the two blind holes. The outer wall of the limiting strip 20 is fixedly installed with two guide strips. When one of the second screw 15 rotates, the two guide strips on the outer wall of the limiting strip 20 cooperate with the limiting grooves to drive the other second screw 15 to rotate.

[0048] The working principle of the medical silica gel guide tube tensile rupture measuring device provided by the application is as follows:

[0049] Open the observation glass 5 on one side of the measuring box 2, pass the medical silicone catheter 7 to be detected through the two ring clamping seats 10 respectively, and then cover the two catheter sleeve seats 21 outside respectively. Start the first motor 3, and the output shaft of the first motor 3 drives the third gear 18 to rotate. Since the third gear 18 is an incomplete gear, when it is engaged with the first gear 14, it drives the rotating cylinder 8 to rotate, so as to realize the switching of the catheter clamping assembly. Each time the rotating cylinder 8 rotates by one hundred and twenty degrees, the third gear 18 drives the rotating cylinder 8 to rotate clockwise intermittently through the first gear 14. When the rotating cylinder 8 rotates clockwise, the second gear 17 is engaged with the toothed plate 16 and drives the second screw 15 to rotate. Since the threads on the two second screws 15 are oppositely arranged, the two ring clamping seats 10 can be driven to slide towards the two catheter sleeve seats 21 respectively until the ring clamping seats 10 clamp the two ends of the silicone catheter 7, so as to complete the fixing of the catheter. Then, the rotating cylinder 8 continues to rotate, and the two catheter sleeve seats 21 without the medical silicone catheter 7 are rotated in front of the worker. The worker repeats the above operation, and the rotating cylinder 8 can switch three catheter clamping assemblies through rotation, so as to realize the simultaneous installation of a maximum of three catheters. Close the observation glass 5, start the second motor 4, and the second motor 4 drives the first screw 9 to rotate, so that the sleeve 19 moves axially along the first screw 9 and drives the moving seat 11 to move away from the fixed seat 13 through the first connecting frame 42, so as to stretch the silicone catheter 7. During the stretching process, the tension is transmitted to the tension sensor 6 through the second connecting frame 43, and the tension sensor 6 monitors the tension of the catheter in real time until the catheter breaks, and the maximum tension value is recorded.

[0050] Second embodiment:

[0051] Based on the medical silicone catheter stretching and breaking measuring device provided in the first embodiment of the present application, the second embodiment of the present application provides another medical silicone catheter stretching and breaking measuring device. The second embodiment is only a preferred mode of the first embodiment, and the implementation of the second embodiment does not affect the separate implementation of the first embodiment.

[0052] The second embodiment of the present application will be further described below in combination with the drawings and embodiments.

[0053] Please refer to Figures 10-13 , the medical silicone catheter stretching and breaking measuring device further comprises a second opening. The second opening is arranged on the left side of the measuring box 2, and a baffle 26 is arranged in the second opening. A guide sliding seat 22 is fixedly arranged on one side of the measuring box 2, and a catheter pulling structure is arranged in the guide sliding seat 22. The catheter pulling structure is used to pull the broken catheter off the catheter sleeve seat 21. The catheter pulling structure further comprises a locking assembly, which is used to limit the movement of the catheter pulling structure.

[0054] The pull tube structure comprises a sliding plate 24, a double-bar connecting arm 25, two U-shaped fixing plates 28, two catheter clamping seats 27 and a limiting button 23, the sliding plate 24 is slidingly installed in the two guide sliding seats 22, the double-bar connecting arm 25 is fixedly installed on the side of the sliding plate 24 close to the measuring box 2, the two U-shaped fixing plates 28 are both fixedly installed on the double-bar connecting arm 25, the two catheter clamping seats 27 are both fixedly installed in the two U-shaped fixing plates 28, a plurality of anti-skid strips 29 are fixedly installed on the inner walls of the two catheter clamping seats 27, when the rotating cylinder 8 is counterclockwise rotated by a certain angle, the silica gel catheter 7 is clamped into the U-shaped fixing plate 28, and when the rotating cylinder 8 is continuously rotated, the U-shaped fixing plate 28 pulls out the silica gel catheter 7 from the catheter sleeve seat 21.

[0055] The locking assembly comprises the limiting button 23 and a first spring 30, the two guide sliding seats 22 are provided with two positioning holes, the side of the sliding plate 24 close to the positioning holes is provided with a sliding groove, the limiting button 23 is slidingly installed in the sliding groove, the first spring 30 is arranged in the sliding groove, and the two ends of the first spring 30 are fixedly connected with the limiting button 23 and the sliding plate 24 respectively, the limiting button 23 is pressed to be pressed into the first spring 30, and at this time, the sliding plate 24 can freely slide on the two guide sliding seats 22.

[0056] When the catheter is broken, the baffle 26 is pulled out, the limiting button 23 is pressed to be pressed into the first spring 30, at this time, the sliding plate 24 can freely slide on the two guide sliding seats 22, the sliding plate 24 is pushed to the measuring box 2, the U-shaped fixing plate 28 is located in the measuring box 2, the limiting button 23 extends into the positioning hole and clamps the sliding plate 24 when the specified position is pushed, at this time, the first motor 3 is started, the first motor 3 drives the rotating cylinder 8 to rotate counterclockwise through the third gear 18, the second gear 17 is engaged with the toothed plate 16 again and drives the second screw 15 to rotate, the two ring clamping seats 10 are away from the two catheter sleeve seats 21 respectively, and the silica gel catheter 7 is no longer clamped, when the rotating cylinder 8 is counterclockwise rotated by a certain angle, the U-shaped fixing plate 28 is located between the ring clamping seat 10 and the catheter sleeve seat 21, then the silica gel catheter 7 is clamped into the U-shaped fixing plate 28, when the rotating cylinder 8 is continuously rotated, the U-shaped fixing plate 28 pulls out the silica gel catheter 7 from the catheter sleeve seat 21, and after the rotating cylinder 8 rotates one circle, the broken silica gel catheter 7 can be pulled out.

[0057] Third embodiment:

[0058] Based on the second embodiment provided by the medical silica gel catheter tensile rupture measuring device, the third embodiment provides another medical silica gel catheter tensile rupture measuring device. The third embodiment is only a preferred mode of the second embodiment, and the implementation of the third embodiment does not affect the separate implementation of the second embodiment.

[0059] The third embodiment of the present application will be further described in combination with the drawings and embodiments.

[0060] Please refer to Figures 14-20 The device for medical silicone catheter tensile rupture determination further comprises a water collecting tank 31 fixedly installed on the top of the bottom plate 1, the outer wall of the rotating cylinder 8 is sleeved with a lifting plate 35, the inner wall of the determination tank 2 is slidably installed with a T-shaped connecting plate, one end of the T-shaped connecting plate is fixedly connected with the lifting plate 35, the bottom of the lifting plate 35 is fixedly installed with a second spring 36, the other end of the second spring 36 is fixedly connected with the determination tank 2, three groups of liquid injection assemblies are arranged on the lifting plate 35, the liquid injection assemblies are used for simultaneously injecting liquid during stretching, the state of the catheter under the double actions of stress and internal fluid pressure can be simulated, two drainage grooves are arranged on the inner wall of the bottom of the determination tank 2, two drainage pipes 32 are fixedly installed on the side of the determination tank 2 close to the water collecting tank 31, and the two drainage pipes 32 are respectively connected with the two drainage grooves.

[0061] Any one set of liquid injection assembly includes water suction pipe 34, water pump 37, water supply seat 33, sealing joint 39 and connecting seat 40, water supply seat 33 is fixedly installed on the top of lifting plate 35, water pump 37 is fixedly installed in water supply seat 33, one end of water suction pipe 34 is fixedly installed on the water inlet end of water pump 37, the other end of water suction pipe 34 extends into water collecting tank 31, sealing joint 39 is slidingly and sealingly installed in water supply seat 33, a one-way valve is further arranged in sealing joint 39, and a plurality of sealing rings are arranged on the outer wall of sealing joint 39, connecting seat 40 is fixedly installed on the bottom of moving seat 11, the bottom of connecting seat 40 is provided with a first mounting hole, a second magnet 41 is fixedly installed in the first mounting hole, a second mounting hole is arranged on sealing joint 39, and a first magnet 38 is fixedly installed in the second mounting hole, the first magnet 38 cooperates with the second magnet 41, when the moving seat 11 is lowered and the silicone tube 7 is stretched, the connecting seat 40 is abutted and connected with the sealing joint 39 through the first magnet 38 and the second magnet 41, the sealing joint 39 slides upward under the magnetic attraction, at this time, the connecting seat 40 is abutted with the sealing joint 39, the sealing ring is tightly attached to the inner wall of the connecting seat 40, the sealing connection is realized, the first water outlet hole is arranged in the water supply seat 33, the water outlet end of the water pump 37 is fixedly connected with the first water outlet hole, the tapered water outlet hole is arranged in the sealing joint 39, the second water outlet hole is arranged in the tube sleeve seat 21, the third water outlet hole is arranged in the moving seat 11, and the first water outlet hole, the tapered water outlet hole, the second water outlet hole and the third water outlet hole are in communication, the first water outlet hole, the tapered water outlet hole, the second water outlet hole and the third water outlet hole are completely communicated, then the corresponding water pump 37 is started, the water pump 37 draws liquid from the water collecting tank 31 through the water suction pipe 34, enters the moving seat 11 through the water supply seat 33, the sealing joint 39 and the connecting seat 40, and finally enters the silicone tube 7 through the second water outlet hole of the tube sleeve seat 21, during the stretching of the tube, the moving seat 11 drives the sealing joint 39 to descend synchronously through the connecting seat 40, the lifting plate 35 descends and compresses the second spring 36, so that the sealing joint 39 and the connecting seat 40 are always tightly abutted, liquid continuously enters the inside of the tube, the tension sensor 6 synchronously monitors the stress of the tube under the combined state of “stretching + internal pressure bearing”, until the tube is broken, the maximum bearing force and the corresponding liquid pressure data are recorded.

[0062] When the mobile seat 11 is lowered and the silica gel conduit 7 is stretched, the connecting seat 40 and the sealing joint 39 are connected by the first magnet 38 and the second magnet 41, and the sealing joint 39 slides upward under the magnetic attraction. At this time, the connecting seat 40 and the sealing joint 39 are connected, and the sealing ring is tightly attached to the inner wall of the connecting seat 40, realizing sealed connection and making the liquid flow path, the first water outlet hole, the conical water outlet hole, the second water outlet hole and the third water outlet hole completely connected. Then, the corresponding water pump 37 is started, and the water pump 37 draws liquid from the water collecting tank 31 through the water suction pipe 34, enters the mobile seat 11 through the water supply seat 33, the sealing joint 39 and the connecting seat 40, and finally injects into the silica gel conduit 7 through the second water outlet hole of the conduit sleeve 21. During the stretching of the conduit, the mobile seat 11 drives the sealing joint 39 to descend synchronously through the connecting seat 40, and the lifting plate 35 is lowered and the second spring 36 is compressed, so that the sealing joint 39 and the connecting seat 40 are always tightly connected, and the liquid is continuously injected into the conduit. At this time, the one-way valve in the sealing joint 39 can prevent the water flow from flowing back into the water supply seat 33. The tension sensor 6 synchronously monitors the stress of the conduit under the combined state of "stretching + internal pressure bearing" until the conduit is broken, and records the maximum bearing force and the corresponding liquid pressure data. After the test is completed, the water pump 37 is turned off, and the liquid injection is stopped. After the conduit is broken, the liquid is collected through the drain groove at the bottom of the measuring tank 2 and is discharged through the drain pipe 32.

[0063] The above is only an embodiment of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation, or direct or indirect application in other related technical fields, which is made by using the content of the specification and drawings of the present application, is also included in the patent protection scope of the present application.

Claims

1. A device for measuring the tensile rupture of a medical silicone catheter, comprising: A base plate (1), a measuring box (2), an observation glass (5), and three tension sensors (6); the measuring box (2) is fixedly mounted on the top of the base plate (1); a first opening is provided on one side of the measuring box (2); the observation glass (5) is rotatably mounted on one side of the measuring box (2); the three tension sensors (6) are all arranged in the measuring box (2); and the measuring box (2) is characterized in that a rotating cylinder (8) is rotatably mounted in the measuring box (2); the top end of the rotating cylinder (8) extends to the outside of the measuring box (2); and the rotating cylinder (8) is provided in a manner similar to the embodiment of the present invention. (8) is provided with a catheter fixing structure, which includes a stretching assembly and three catheter clamping assemblies, the stretching assembly is used to stretch the catheter, and the catheter clamping assembly is used to clamp the two ends of the catheter, the outer wall of the rotating cylinder (8) is fixedly installed with a first gear (14), the top of the measuring box (2) is fixedly installed with a first motor (3), the output shaft of the first motor (3) extends into the measuring box (2) and is fixedly installed with a third gear (18), and the third gear (18) is meshed with the first gear (14).

2. The device for measuring the tensile rupture of medical silicone catheters according to claim 1, characterized in that: The stretching assembly includes a second motor (4), a first screw (9), a sleeve (19) and three first connecting frames (42), wherein the second motor (4) is fixedly mounted on the top of the rotating cylinder (8), the first screw (9) is rotatably mounted in the rotating cylinder (8), the output shaft of the second motor (4) extends into the rotating cylinder (8) and is fixedly connected to the first screw (9), the sleeve (19) is threadedly connected to the first screw (9), and the three first connecting frames (42) are all fixedly mounted on the outer wall of the sleeve (19), and the three first connecting frames (42) are distributed in a 120-degree rotational symmetry.

3. The device for measuring the tensile rupture of medical silicone catheters according to claim 2, characterized in that: Any group of the catheter clamping components includes a tooth plate (16), a fixed seat (13), a movable seat (11), a ring clamping seat (10), two catheter sleeve seats (21), a second screw (15) and a second gear (17), wherein the tooth plate (16) is fixedly mounted on the top inner wall of the measuring box (2), a flange fixing cylinder is fixedly mounted on the outer wall of the rotating cylinder (8), the fixed end of the tension sensor (6) is fixedly mounted on the bottom of the flange fixing cylinder, a second connecting frame (43) is slidably mounted on the bottom of the flange fixing cylinder, the force-bearing end of the tension sensor (6) is fixedly connected to the second connecting frame (43), the fixed seat (13) is fixedly mounted in the second connecting frame (43), the movable seat (11) is fixedly mounted in one of the first connecting frames (42), and the two catheters The sleeves (21) are respectively fixedly mounted on the ends of the fixed seat (13) and the movable seat (11) close to each other, and the two ends of the silicone tube (7) are respectively sleeved on the outside of the two tube sleeves (21). The outer walls of the fixed seat (13) and the movable seat (11) are fixedly mounted with support plates, and the second screws (15) are rotatably mounted on the two support plates. The outer sides of the two second screws (15) are threadedly connected with the annular clamping seat (10), and the annular clamping seat (10) is sleeved on the outside of the silicone tube (7). The same telescopic guide rod (12) is fixedly mounted on the two support plates, and the two annular clamping seats (10) are slidably mounted on the telescopic guide rod (12). The second gear (17) is fixedly mounted on the top of one of the second screws (15).

4. The device for measuring the tensile rupture of medical silicone catheters according to claim 1, characterized in that: The third gear (18) is an incomplete gear, having teeth on only a portion of its circumference and the remaining portion being a smooth arc.

5. The device for measuring the tensile rupture of medical silicone catheters according to claim 3, characterized in that: A blind hole is provided in each of the two second screw rods (15), and limiting grooves are provided on both sides of the blind hole. The same limiting strip (20) is slidably installed in the two blind holes, and two guide strips are fixedly installed on the outer wall of the limiting strip (20), and the guide strips are adapted to the limiting grooves.

6. The device for measuring the tensile rupture of medical silicone catheters according to claim 1, characterized in that: A second opening is provided on the left side of the measuring box (2), and a baffle (26) is provided in the second opening. Two guide slides (22) are fixedly installed on one side of the measuring box (2), and a tube pulling structure is provided in the two guide slides (22). The tube pulling structure is used to pull the broken catheter off the catheter sleeve (21). The tube pulling structure also includes a locking component, which is used to limit the movement of the tube pulling structure.

7. The device for measuring the tensile rupture of medical silicone catheters according to claim 6, characterized in that: The tube pulling structure includes a sliding plate (24), a double-rod connecting arm (25), two U-shaped fixing plates (28), two catheter clamps (27) and a limiting button (23), wherein the sliding plate (24) is slidably installed in the two guide slides (22), the double-rod connecting arm (25) is fixedly installed on one side of the sliding plate (24) close to the measuring box (2), the two U-shaped fixing plates (28) are both fixedly installed on the double-rod connecting arm (25), the two catheter clamps (27) are respectively fixedly installed in the two U-shaped fixing plates (28), and a plurality of anti-slip strips (29) are fixedly installed on the inner walls of the two catheter clamps (27).

8. The device for measuring the tensile rupture of medical silicone catheters according to claim 7, characterized in that: The locking assembly includes a limiting button (23) and a first spring (30), two positioning holes are provided on the guide slide (22), a sliding groove is provided on a side of the sliding plate (24) close to the positioning holes, the limiting button (23) is slidably installed in the sliding groove, the first spring (30) is arranged in the sliding groove, and the two ends of the first spring (30) are fixedly connected to the limiting button (23) and the sliding plate (24) respectively.

9. The device for measuring the tensile rupture of medical silicone catheters according to claim 3, characterized in that: A water collecting box (31) is fixedly installed on the top of the base plate (1), a lifting plate (35) is provided on the outer wall of the rotating cylinder (8), a T-shaped connecting plate is slidably installed on the inner wall of the measuring box (2), one end of the T-shaped connecting plate is fixedly connected to the lifting plate (35), a second spring (36) is fixedly installed on the bottom of the lifting plate (35), and the other end of the second spring (36) is fixedly connected to the measuring box (2), three groups of liquid injection components are provided on the lifting plate (35), and the liquid injection components are used to inject liquid simultaneously during stretching, and can simulate the state of the catheter under the dual action of force and internal fluid pressure, two drainage grooves are provided on the bottom inner wall of the measuring box (2), and two drainage pipes (32) are fixedly installed on the side of the measuring box (2) close to the water collecting box (31), and the two drainage pipes (32) are respectively connected to the two drainage grooves.

10. The device for measuring the tensile rupture of medical silicone catheters according to claim 9, characterized in that: Any group of the liquid injection components includes a water pump (34), a water pump (37), a water supply seat (33), a sealing joint (39) and a connecting seat (40), wherein the water supply seat (33) is fixedly mounted on the top of the lifting plate (35), the water pump (37) is fixedly mounted in the water supply seat (33), one end of the water pump (34) is fixedly mounted on the water inlet end of the water pump (37), and the other end of the water pump (34) extends into the water collecting tank (31), the sealing joint (39) is slidingly sealed and mounted in the water supply seat (33), and the outer wall of the sealing joint (39) is provided with a plurality of sealing rings, and the connecting seat (40) is fixedly mounted on the bottom of the movable seat (11). The bottom of the connecting seat (40) is provided with a first mounting hole, a second magnet (41) is fixedly installed in the first mounting hole, a second mounting hole is provided on the sealing joint (39), a first magnet (38) is fixedly installed in the second mounting hole, the first magnet (38) cooperates with the second magnet (41), a first water outlet is provided in the water supply seat (33), the water outlet end of the water pump (37) is fixedly connected to the first water outlet, a conical water outlet is provided in the sealing joint (39), a second water outlet is provided in the catheter sleeve seat (21), a third water outlet is provided in the movable seat (11), and the first water outlet, the conical water outlet, the second water outlet and the third water outlet are all connected.

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