Angiography catheter production line

Abstract

The present invention belongs to the technical field of angiography catheters, specifically a production line of angiography catheters, including a chassis, on which a wire-releasing device, a braided mesh stripping device, an extruder and a traction machine are sequentially arranged, the wire-releasing device is used to provide a braided assembly for the production line, the braided mesh stripping device is used to weld and cut off part of the braided mesh on the braided assembly, the extruder is used to coat the outer layer of polymer material, and the traction machine is used to provide a stable traction force for the angiography catheter. The angiography catheter produced by the production line of the present invention does not have a connecting part, and the braided tube and the non-braided tube are an integrated structure, which solves the problem of fracture at the connection between the braided tube and the non-braided tube, and the production line can realize automated mass production, thereby improving production efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of angiography catheters, and in particular relates to an angiography catheter production line. Background Art

[0002] As a common type III medical device for coronary intervention, neurointervention, and peripheral intervention, angiography catheters can deliver contrast agents and liquid medicine to the target location. At present, the tube body of mainstream angiography catheters on the market is composed of braided tubes and non-braided tubes.

[0003] When producing the braided tube, an extruder is first used to extrude a polymer support core shaft made of fluorine-containing material, and then the inner layer of polymer material is extruded onto the support core shaft using the extruder, and then the stainless steel wire is braided on the inner layer of polymer material using a braiding machine to produce a rolled braided component, and then the outer layer of polymer material is extruded onto the braided component using an extruder, and then an automatic cutter is used to cut it to the target length, and finally the support core shaft is pulled out to form the braided tube of the angiography catheter.

[0004] The production of non-braided tubes is mainly completed by extruders, through which single-lumen tubes of target size can be extruded, that is, non-braided tubes of angiographic catheters. Finally, the braided tube and the non-braided tube are connected together to form the tube body of the angiographic catheter. Currently, there are several ways to connect the braided tube and the non-braided tube together: 1. Bond the braided tube and the non-braided tube together with UV-sensitive glue; 2. Heat shrink the braided tube and the non-braided tube together by butt welding with FEP heat shrink tubes; 3. Insert the braided tube and the non-braided tube into a metal mold with a through hole, and the mold welds the braided tube and the non-braided tube together under the action of high-frequency heating; 4. Insert the braided tube and the non-braided tube into a glass capillary, and also weld the braided tube and the non-braided tube together by high-frequency heating.

[0005] Regardless of the connection method used, there is a risk of breakage at the connection point of the braided tube and the non-braided tube, which may cause medical accidents. In addition, when using the braided tube and the non-braided tube to connect the tube to produce angiographic catheters, it is necessary to first produce the braided tube and the non-braided tube, and then connect the braided tube and the non-braided tube together, which has low production efficiency. Summary of the invention

[0006] In order to solve the problems in the above-mentioned background technology, the present invention provides a production line for angiography catheters. The produced angiography catheters do not have connecting parts, and the braided tube and the non-braided tube are an integrated structure, which solves the problem of breakage at the connecting part between the braided tube and the non-braided tube, and the production line can realize automated mass production, thereby improving production efficiency.

[0007] The present invention provides a production line for angiography catheters, comprising a base frame, on which a wire-paying device, a braided mesh stripping device, an extruder and a traction machine are sequentially arranged. The wire-paying device is used to provide a braided component for the production line, the braided mesh stripping device is used to weld and cut off part of the braided mesh on the braided component, the extruder is used to coat an outer layer of polymer material, and the traction machine is used to provide a stable traction force for the angiography catheter.

[0008] Furthermore, the wire-releasing device includes an extension plate fixed on the base frame, a first drive motor is fixedly mounted on one side of the extension plate, a side of the extension plate facing away from the first drive motor is rotatably connected to a support rod, the support rod is fixedly connected to the output shaft of the first drive motor, an abutment plate is fixed on the support rod, a movable plate is movably arranged on the support rod, the weaving component is clamped between the abutment plate and the movable plate, a locking handle for fixing the position of the movable plate is installed on the movable plate, a mounting rod is also fixed on the extension plate, and a guide wheel is rotatably connected to the mounting rod.

[0009] Furthermore, the woven mesh stripping device includes a first support frame fixed on a base frame, a first laser is arranged on the first support frame, the first laser includes a first mounting ring, a plurality of first laser heads and a plurality of first air nozzles are installed inside the first mounting ring, a first laser head and a first air nozzle are arranged close to each other as a group, two first guide rings are fixed on the first support frame, the two first guide rings are located at both ends of the first support frame, a first air compressor is also installed on the first support frame, a first air pipe is connected to the first air compressor, and an end of the first air pipe away from the first air compressor is connected to the first air nozzle.

[0010] Furthermore, a second laser and a third laser are also arranged on the first support frame, and the first laser, the second laser and the third laser are arranged in sequence. The second laser includes at least three mounting plates, and the three mounting plates are distributed in a ring shape. The mounting plates are arranged along the length direction of the weaving component, and each mounting plate is equipped with multiple second laser heads and multiple second air nozzles along its own length direction. A second laser head and a second air nozzle are arranged close to each other as a group. The third laser has the same structure as the first laser. Two electric clamps are also installed on the first support frame, and the two electric clamps are also located at both ends of the first support frame. The first guide ring is located on the outside of the electric clamp. Multiple first air pipes are arranged, and the end of the first air pipe away from the first air compressor is respectively connected to the first air nozzle and the second air nozzle. A wire storage rack for storing weaving component tube materials is arranged on the base frame, and the wire storage rack is located between the weaving mesh stripping device and the extruder.

[0011] Furthermore, the wire storage rack includes a third supporting frame fixed on the base frame, wherein a first fixed pulley, a second fixed pulley and a third fixed pulley are rotatably mounted on the third supporting frame, the first fixed pulley is mounted on a left end of the third supporting frame, and the third fixed pulley is mounted on a right end of the third supporting frame, the second fixed pulley is located between the first fixed pulley and the third fixed pulley and is located at the top of the third supporting frame, a plurality of wire storage grooves are opened on the second fixed pulley, two connecting rods are rotatably connected to the third supporting frame, a movable pulley is rotatably connected between the two connecting rods, the movable pulley is located below the second fixed pulley, and a plurality of wire storage grooves are also opened on the movable pulley, a spring is fixed between the connecting rod and the top of the third supporting frame, the spring drives the movable pulley to move in a direction away from the second fixed pulley, and the weaving assembly passes around the first fixed pulley, the second fixed pulley, the movable pulley and the third fixed pulley in sequence on the wire storage rack.

[0012] Furthermore, an emergency stop assembly is provided on the third support frame, and the emergency stop assembly includes an emergency stop button fixed on the top of the third support frame, and a trigger plate is fixed on the connecting rod. When the connecting rod is rotated upward to the limit position, the trigger plate touches the emergency stop button; a tensioning wheel is also provided on the third support frame, and the tensioning wheel is located between the movable pulley and the third fixed pulley and is located at the upper left of the third fixed pulley, and the tensioning wheel is vertically slidably arranged on the third support frame, and a release assembly that allows the tensioning wheel to slide downward is provided on the third support frame. The release assembly includes a mounting frame, the tensioning wheel is mounted on the mounting frame, and a release plate is fixed on the top of the mounting frame. A slide groove is vertically opened on the third support frame, and the release plate is movably arranged in the slide groove. A receiving groove is opened on the top of the third support frame, and a clamping block is arranged in the receiving groove. A clamping groove is opened on the release plate, and the clamping block is partially clamped in the clamping groove. A first fixing rod is fixed on the connecting rod, and the first fixing rod is tilted upward, and a connecting rope is connected between the first fixing rod and the clamping block.

[0013] Furthermore, an automatic stripping device for cleaning residual woven mesh on the woven assembly is provided on the base frame, and the automatic stripping device is located between the woven mesh stripping device and the extruder. The automatic stripping device includes a second support frame fixed on the base frame, a second mounting ring is fixed on the second support frame, a plurality of brush heads are installed inside the second mounting ring, and a plurality of dust suction holes are opened on each brush head. A vacuum cleaner is also installed on the second support frame, and a plurality of dust suction pipes are connected to the vacuum cleaner. An end of the dust suction pipe away from the vacuum cleaner is connected to the brush head, and the dust suction pipe is communicated with the dust suction hole.

[0014] Furthermore, a cooling and drying device for shaping the angiography catheter and blowing away residual water droplets is provided on the base frame, and the cooling and drying device is located between the extruder and the traction machine, and the cooling and drying device includes a cooling component and an air-drying component, and the cooling component includes a water tank, and second guide rings are fixed at both ends of the water tank, and a supporting pulley is also installed inside the water tank, and the air-drying component includes a collecting tank body, and a second fixed rod is vertically fixed on the collecting tank body, and a third guide ring and a first gas nozzle are fixed on the top of the second fixed rod, and a second air compressor is installed on the outer wall of the collecting tank body, and a second air pipe is connected to the second air compressor, and the end of the second air pipe away from the second air compressor is connected to the first gas nozzle.

[0015] Furthermore, a cutter for cutting the radiographic catheter to a target length is provided on the base frame, and the cutter is located at the next workstation of the traction machine. The cutter includes a first fixed plate fixed on the base frame, and two guide blocks with through holes are fixed on one side of the first fixed plate. A meter is installed on the side of the first fixed plate away from the guide block, and a meter wheel is rotatably connected to the side of the first fixed plate away from the meter, and the meter wheel is located between the two guide blocks. The meter wheel is connected to the input shaft of the meter wheel, and a swing rod is rotatably connected to the base frame, and a clamping wheel is rotatably connected to the top of the swing rod, and the clamping wheel presses the radiographic catheter onto the meter wheel; the cutter also includes a lower cutter fixed on the base frame, and a linear drive is installed on the lower cutter, and an upper cutter is rotatably connected to the lower cutter, and a push rod of the linear drive is rotatably connected to the upper cutter.

[0016] Furthermore, a laser diameter gauge for measuring the outer diameter of the angiography catheter and a finished product collection device for screening qualified angiography catheters are provided on the base frame, the laser diameter gauge is located between the extruder and the traction machine, the finished product collection device is located at the next station of the cutting machine, the finished product collection device includes a second fixed plate fixed on the base frame, a second conveyor belt is installed on one side of the second fixed plate, and a plurality of second gas nozzles are installed on the same side of the second fixed plate, the second gas nozzles are located above the second conveyor belt, a third air compressor is also installed on the base frame, a third air pipe is connected to the third air compressor, and one end of the third air pipe away from the third air compressor is connected to the second gas nozzle, a finished product collection trough is fixed on the base frame, the finished product collection trough is located on the side of the second conveyor belt, and a waste collection trough is provided at the end of the second conveyor belt.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] (1) The angiographic catheters produced by this production line do not have a connecting part. The braided tube and the non-braided tube are an integrated structure, which solves the problem of breakage at the connecting part between the braided tube and the non-braided tube. In addition, the production line can realize automated mass production, thereby improving production efficiency.

[0019] (2) After the braided component enters the braided mesh stripping device, two electric clamps clamp the braided component, and then the first laser, the second laser and the third laser simultaneously strip the braided mesh of the braided component between the first laser and the third laser. During stripping, the first laser and the third laser weld the intersection of the braided mesh on the braided component and perform circular cutting at the same time. The first laser head welds the intersection of the braided mesh, and the energy generated by the first laser head can melt the braided mesh. At the moment the braided mesh melts, the first air nozzle sprays high-pressure gas to cut the braided mesh. After the first laser head and the first air nozzle stop working, the melted braided mesh will solidify instantly under room temperature conditions, thereby achieving the purpose of welding and cutting the braided mesh; the second laser cuts the braided mesh between the first laser and the third laser in a straight line. The principle is the same as above. After the laser operation is completed, the braided component will continue to move to the next process. Repeating this operation will obtain a braided component with a repeating unit structure of one section being a braided section and one section being a non-braided section.

[0020] (3) During the normal production of the braiding assembly, the tensioning wheel is located above the third fixed pulley. At this time, the clamping block is clamped in the clamping groove, and the connecting rope is in a relaxed state. When the connecting rod rotates upward to the limit position, the trigger plate will trigger the emergency stop button and the entire production line will stop. However, the equipment of the production line stops running by gradually slowing down and stopping. Therefore, there is a risk of the braiding assembly being broken during the shutdown process. Therefore, when the trigger plate triggers the emergency stop button, the connecting rod drives the first fixed rod to rotate away from the clamping block, and the connecting rope is straightened and drives the clamping block to move. After the clamping block is separated from the clamping groove, the release plate slides downward along the slide groove, and the release plate drives the tensioning wheel to move downward to the bottom of the third fixed pulley. At this time, the braiding assembly will have loose space to prevent the braiding assembly from being broken during the shutdown process of the production line. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is a schematic diagram of the overall structure of an angiography catheter production line;

[0023] Figure 2 It is a structural schematic diagram of the wire-releasing device;

[0024] Figure 3 It is a structural schematic diagram of a braided mesh stripping device;

[0025] Figure 4 It is a structural schematic diagram of an automatic stripping device;

[0026] Figure 5 It is a structural schematic diagram of the wire storage rack;

[0027] Figure 6 A schematic diagram of winding of a braiding assembly on a wire storage rack;

[0028] Figure 7 It is a schematic diagram of the structure of the release component;

[0029] Figure 8 It is a schematic diagram of the structure of the extruder and cooling components;

[0030] Fig. 9 It is a structural schematic diagram of a cooling and air-drying device;

[0031] Fig.10 It is a schematic diagram of the structure of the laser diameter gauge and the traction machine;

[0032] Fig.11 It is a schematic diagram of the structure of the cutting machine;

[0033] Fig.12 It is a structural schematic diagram of a finished product collection device;

[0034] Explanation of reference numerals: 1. chassis; 2. wire-releasing device; 20. extension plate; 21. first drive motor; 22. support rod; 23. abutment plate; 24. movable plate; 25. locking handle; 26. mounting rod; 27. guide wheel; 3. woven mesh stripping device; 30. first support frame; 31. first laser; 310. first mounting ring; 311. first laser head; 312. first air nozzle; 32. second laser; 320. mounting plate; 321. second laser head; 322. second air nozzle; 33. third laser; 34. electric clamp claw; 35, first guide ring; 36, first air compressor; 37, first air pipe; 4, automatic stripping device; 40, second support frame; 41, second mounting ring; 42, brush head; 43, dust suction hole; 44, dust collector; 45, dust suction pipe; 5, wire storage rack; 50, third support frame; 51, first fixed pulley; 52, second fixed pulley; 53, third fixed pulley; 54, connecting rod; 55, movable pulley; 56, spring; 57, emergency stop assembly; 570, emergency stop button; 571, trigger plate; 58, tension wheel; 59, release assembly; 59 0. Mounting frame; 591. Release plate; 592. Slide; 593. Accommodating groove; 594. Clamping block; 595. Clamping groove; 596. First fixing rod; 597. Connecting rope; 6. Extruder; 7. Cooling and air-drying device; 70. Cooling assembly; 700. Water tank; 701. Second guide ring; 702. Support pulley; 71. Air-drying assembly; 710. Collecting tank body; 711. Second fixing rod; 712. Third guide ring; 713. First gas nozzle; 714. Second air compressor; 715. Second air pipe; 8. Laser diameter gauge; 9. Traction machine; 90. First conveyor belt; 91. Second drive motor; 10. Cutter; 100. First fixed plate; 101. Guide block; 102. Meter; 103. Meter wheel; 104. Swing rod; 105. Pressure wheel; 106. Lower cutter; 107. Linear drive; 108. Upper cutter; 11. Finished product collecting device; 110. Second fixed plate; 111. Second conveyor belt; 112. Second gas nozzle; 113. Third air compressor; 114. Third air pipe; 115. Finished product collecting tank; 116. Waste collecting tank. DETAILED DESCRIPTION

[0035] The following will be combined with the accompanying drawings in the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work belong to the protection scope of the present invention.

[0036] The following is combined with Figure 1 To Attachment Fig.12 The present invention is described in detail with reference to specific embodiments.

[0037] Reference Figure 1 The present invention provides a production line for angiographic catheters, comprising a base frame 1, on which are arranged in sequence a wire-releasing device 2, a braided mesh stripping device 3, an automatic stripping device 4, a wire storage rack 5, an extruder 6, a cooling and air-drying device 7, a laser diameter gauge 8, a traction machine 9, a cutting machine 10 and a finished product collecting device 11.

[0038] Reference Figure 2 The pay-off device 2 includes an extension plate 20 fixed on the base frame 1, a first drive motor 21 is fixedly installed on one side of the extension plate 20, a support rod 22 is rotatably connected to the side of the extension plate 20 away from the first drive motor 21, the support rod 22 is fixedly connected to the output shaft of the first drive motor 21, an abutment plate 23 is fixed on one end of the support rod 22 close to the extension plate 20, a movable plate 24 is movably arranged on the support rod 22, the rolled braiding component is clamped between the abutment plate 23 and the movable plate 24, a locking handle 25 for fixing the position of the movable plate 24 is installed on the movable plate 24, when the locking handle 25 is rotated, one end of the locking handle 25 abuts against the support rod 22, thereby fixing the movable plate 24 on the support rod 22. A mounting rod 26 is also fixed on the extension plate 20 . The mounting rod 26 is located on a side of the extension plate 20 away from the first drive motor 21 and between the abutment plate 23 and the woven mesh stripping device 3 . A guide wheel 27 is rotatably connected to the mounting rod 26 .

[0039] When installing the rolled woven component, the rolled woven component is inserted into the support rod 22 and one side is pressed against the abutment plate 23, and then the movable plate 24 is inserted into the support rod 22, so that the movable plate 24 is pressed against the other side of the woven component, and then the locking handle 25 is rotated to fix the position of the movable plate 24, and one end of the woven component bypasses the guide wheel 27 and enters the woven mesh stripping device 3. The guide wheel 27 plays a guiding role, so that the woven component enters the woven mesh stripping device 3 straightly, and then the first drive motor 21 drives the support rod 22 to rotate, and the support rod 22 drives the woven component to rotate, thereby continuously providing woven components for the next process.

[0040] Reference Figure 3The woven mesh stripping device 3 includes a first support frame 30 fixed on the base frame 1, and a first laser 31, a second laser 32 and a third laser 33 are sequentially arranged on the first support frame 30. The first laser 31 includes an annular first mounting ring 310, and the first mounting ring 310 is fixed on the first support frame 30. A plurality of first laser heads 311 are installed inside the first mounting ring 310. In this embodiment, three first laser heads 311 are set, and the three first laser heads 311 are evenly distributed in the first mounting ring 310. A plurality of first air nozzles 312 are also installed inside the first mounting ring 310. In this embodiment, three first air nozzles 312 are also set, and the three first air nozzles 312 are evenly distributed in the first mounting ring 310. One first laser head 311 and one first air nozzle 312 are arranged close to each other as a group.

[0041] The second laser 32 includes at least three long strip-shaped mounting plates 320. In the present embodiment, there are preferably three mounting plates 320, which are arranged along the length direction of the weaving component. Each mounting plate 320 is provided with a plurality of second laser heads 321 and a plurality of second air nozzles 322 along its own length direction. A second laser head 321 and a second air nozzle 322 are arranged close to each other as a group, and the three mounting plates 320 are spaced 120° apart from each other in a circular arrangement, so as to prevent the second laser heads 321 on different mounting plates 320 from shooting at each other and causing damage to the second laser heads 321.

[0042] The structure of the third laser 33 is the same as that of the first laser 31, so it is not described again; two electric clamps 34 are installed on the first support frame 30, and the two electric clamps 34 are located at both ends of the first support frame 30. The electric clamps 34 are used to clamp the weaving component to keep the weaving component in a static state; two first guide rings 35 are also fixed on the first support frame 30, and the two first guide rings 35 are also located at both ends of the first support frame 30 and on the outside of the electric clamps 34. The first guide rings 35 play a role in stable movement and guidance of the weaving component; a first air compressor 36 is also installed on the first support frame 30, and a plurality of first air pipes 37 are connected to the first air compressor 36. The ends of the first air pipes 37 away from the first air compressor 36 are respectively connected to the first air nozzle 312 and the second air nozzle 322, thereby providing high-pressure gas to the first air nozzle 312 and the second air nozzle 322.

[0043] After the woven component enters the woven mesh stripping device 3, two electric clamps 34 clamp the woven component, and then the first laser 31, the second laser 32 and the third laser 33 simultaneously strip the woven mesh of the woven component between the first laser 31 and the third laser 33. During stripping, the first laser 31 and the third laser 33 weld the intersection of the woven mesh on the woven component and perform circular cutting at the same time. The principle is that the first laser head 311 welds the intersection of the woven mesh, and the energy generated by the first laser head 311 can melt the woven mesh. At the moment the woven mesh melts, the first air nozzle 312 sprays high-pressure gas to cut the woven mesh, and the first laser head 311 and the first air nozzle 312 stop After working, under room temperature conditions, the melted woven mesh will solidify instantly, thereby achieving the purpose of welding and cutting the woven mesh; the second laser 32 cuts the woven mesh between the first laser 31 and the third laser 33 in a straight line, and the principle is the same as above, so that the woven mesh on the woven component between the first laser 31 and the third laser 33 is peeled off, exposing the inner layer of polymer material, forming a non-woven segment, and after the laser operation is completed, the woven component will continue to move to the next process, and the distance the woven component moves forward must be greater than the length of the non-woven segment, so as to retain a woven segment, and then the laser operates again, and repeating this operation will obtain a woven component with a repeating unit structure of one section being a woven segment and one section being a non-woven segment.

[0044] As another method of this embodiment, the electric clamp 34, the second laser 32 and the third laser 33 may not be used, and only the first laser 31 may be used. After the weaving component enters the weaving mesh stripping device 3, it will not stop but will continue to be transported forward. The first laser 31 will be turned on once at a certain interval, and each time it is turned on for a certain period of time. When the first laser 31 is turned on, the weaving component will be transported forward, and the first laser 31 will continue to cut the weaving mesh. The cutting principle is the same as above. When the first laser 31 is turned off, the weaving mesh will not be cut. Since the first laser 31 is constantly turned on and off, a weaving component with a repeating unit structure of one section being a weaving section and one section being a non-weaving section will be obtained. This method can also achieve the same effect.

[0045] Reference Figure 4 The automatic stripping device 4 includes a second support frame 40 fixed on the base frame 1, a second mounting ring 41 is fixed on the second support frame 40, and a plurality of brush heads 42 are installed inside the second mounting ring 41. In this embodiment, three brush heads 42 are provided, and the three brush heads 42 are evenly distributed in the second mounting ring 41. Each brush head 42 is provided with a plurality of dust suction holes 43. A vacuum cleaner 44 is also installed on the second support frame 40, and a plurality of dust suction pipes 45 are connected to the vacuum cleaner 44. The end of the dust suction pipe 45 away from the vacuum cleaner 44 is connected to the brush head 42, and the dust suction pipe 45 is communicated with the dust suction hole 43.

[0046] After the woven component is stripped by the woven mesh stripping device 3, some cut woven mesh will still be attached to the woven component. When the woven component passes through the brush head 42, the brush head 42 can brush off the cut woven mesh. At the same time, the vacuum cleaner 44 sucks away the cut woven mesh through the vacuum tube 45 to ensure that the non-woven tube part is clean and tidy.

[0047] Reference Figure 5-Figure 7 The wire storage rack 5 includes a third support frame 50 fixed on the base frame 1, and a first fixed pulley 51, a second fixed pulley 52 and a third fixed pulley 53 are rotatably mounted on the third support frame 50. The first fixed pulley 51 is mounted on the left end of the third support frame 50, and the third fixed pulley 53 is mounted on the right end of the third support frame 50. The second fixed pulley 52 is located between the first fixed pulley 51 and the third fixed pulley 53 and is located at the top of the third support frame 50. A plurality of wire storage grooves are provided on the second fixed pulley 52. ​​In this embodiment, five wire storage grooves are provided, so that five layers of braided components can be stored. There are two connecting rods 54 connected to each other, and the rotation point of the connecting rod 54 is located between the first fixed pulley 51 and the second fixed pulley 52. ​​A movable pulley 55 is rotatably connected between the two connecting rods 54. The movable pulley 55 is located below the second fixed pulley 52. ​​Five wire storage grooves are also provided on the movable pulley 55. A spring 56 is fixed between the connecting rod 54 and the top of the third support frame 50. The spring 56 drives the movable pulley 55 to move away from the second fixed pulley 52. ​​The braiding assembly passes through the first fixed pulley 51, the second fixed pulley 52, the movable pulley 55 and the third fixed pulley 53 on the wire storage frame 5 in sequence. Figure 6 The winding path of the braided component.

[0048] After the braided component leaves the automatic stripping device 4, it will enter the extruder 6. The extruder 6 will extrude the outer layer of polymer material and coat it on the braided component with a repeating unit structure. Therefore, the extruder 6 is continuously working to keep the braided component in motion, while the braided component is in a stationary state at the braided mesh stripping device 3. Therefore, it is necessary to set a wire storage rack 5 in the previous process of the extruder 6 to balance the motion state and the stationary state of the braided component. When the electric clamp 34 clamps the braided component to keep it stationary, the extruder 6 will consume the braided component stored on the wire storage rack 5. 6 drives the braiding assembly on the wire storage rack 5 to move, at this time the movable pulley 55 will overcome the elastic force of the spring 56 and move towards the second fixed pulley 52, so the distance between the movable pulley 55 and the second fixed pulley 52 becomes smaller, that is, the braiding assembly between the movable pulley 55 and the second fixed pulley 52 is consumed, when the electric clamp 34 releases the braiding assembly, the spring 56 pushes the connecting rod 54 to move, and the connecting rod 54 drives the movable pulley 55 to move away from the second fixed pulley 52, the distance between the movable pulley 55 and the second fixed pulley 52 becomes larger, the braiding assembly is stored again, and dynamic balance is achieved.

[0049] An emergency stop assembly 57 is provided on the third support frame 50, and the emergency stop assembly 57 includes an emergency stop button 570 fixed on the top of the third support frame 50, and a trigger plate 571 is fixed on the connecting rod 54. When the connecting rod 54 rotates upward to the extreme position, the trigger plate 571 touches the emergency stop button 570; during the normal production process of the weaving assembly, the wire storage rack 5 keeps the weaving assembly in dynamic balance, and the trigger plate 571 will not touch the emergency stop button 570 when the connecting rod 54 swings. When the electric clamp 34 fails and cannot release the weaving assembly, the extruder 6 will continue to drive the weaving assembly to the next process, so the connecting rod 54 will drive the movable pulley 55 to continue to rotate upward to the extreme position, and at this time the trigger plate 571 will touch the emergency stop button 570, thereby stopping the entire production line and preventing the weaving assembly from being broken by the extruder 6.

[0050] A tensioning wheel 58 is also provided on the third support frame 50. The tensioning wheel 58 is located between the movable pulley 55 and the third fixed pulley 53. The tensioning wheel 58 is located at the upper left of the third fixed pulley 53. The weaving assembly passes through the movable pulley 55, the tensioning wheel 58 and the third fixed pulley 53 in sequence. The tensioning wheel 58 is vertically slidably provided on the third support frame 50. The third support frame 50 is provided with a release assembly 59 for making the tensioning wheel 58 slide downward. The release assembly 59 includes a mounting frame 590. The tensioning wheel 58 is installed on the mounting frame 590. A release plate 591 is fixed on the top of the mounting frame 590. A slide groove 592 is vertically opened on the third support frame 50, and the release plate 591 is slidably set in the slide groove 592. A receiving groove 593 is opened on the top of the third support frame 50, and a clamping block 594 is set in the receiving groove 593. A clamping groove 595 is opened on the release plate 591, and the clamping block 594 is partially clamped in the clamping groove 595, so as to limit the release plate 591 from sliding downward. A first fixing rod 596 is fixed on the connecting rod 54, and the first fixing rod 596 is tilted upward. A connecting rope 597 is connected between the first fixing rod 596 and the clamping block 594.

[0051] During the normal production of the weaving assembly, the tensioning wheel 58 is located at the upper left of the third fixed pulley 53. At this time, the clamping block 594 is clamped in the clamping groove 595, and the connecting rope 597 is in a relaxed state. When the connecting rod 54 rotates upward to the limit position, the trigger plate 571 triggers the emergency stop button 570, and the entire production line stops running. However, the equipment of the production line stops running by gradually slowing down and stopping, not stopping abruptly. Therefore, there is also a risk of the weaving assembly being broken during the shutdown process. Therefore, when the trigger plate 571 triggers the emergency stop button 570, the connecting rod 54 drives the first fixed rod 596 to rotate away from the clamping block 594, the connecting rope 597 is straightened and drives the clamping block 594 to move. After the clamping block 594 is disengaged from the clamping groove 595, the release plate 591 slides downward along the slide groove 592, and the release plate 591 drives the tensioning wheel 58 to move downward to the bottom of the third fixed pulley 53. At this time, the weaving assembly will have loose space to prevent the weaving assembly from being broken during the shutdown process of the production line.

[0052] Reference Figure 8 and Fig. 9 The extruder 6 evenly coats the outer polymer material on the braided component with a repeating unit structure, thereby forming a radiographic catheter with a repeating unit structure of one section being a braided tube and one section being a non-braided tube, and then enters the cooling and air-drying device 7, the cooling and air-drying device 7 includes a cooling component 70 and an air-drying component 71, the cooling component 70 includes a water tank 700, and second guide rings 701 are fixed at both ends of the water tank 700, and a supporting pulley 702 is also installed inside the water tank 700 to ensure the stable transportation of the radiographic catheter in the water tank 700; after the radiographic catheter is output from the extruder 6, the outer polymer material is in a molten state, and the usual temperature is around 170°C. When it contacts the room temperature water in the water tank 700, the outer polymer material quickly cools down to a highly elastic state, thereby being fixed.

[0053] The air drying assembly 71 includes a collecting tank body 710, on which a second fixing rod 711 is vertically fixed, a third guide ring 712 and a first gas nozzle 713 are fixed at the top of the second fixing rod 711, a second air compressor 714 is installed on the outer wall of the collecting tank body 710, a second air pipe 715 is connected to the second air compressor 714, and one end of the second air pipe 715 away from the second air compressor 714 is connected to the first gas nozzle 713. The contrast catheter enters the air drying assembly 71 after passing through the cooling assembly 70, the second air compressor 714 provides high-pressure gas to the first gas nozzle 713, and the first gas nozzle 713 sprays the contrast catheter, thereby clearing the residual water on the contrast catheter.

[0054] Reference Fig.10The laser diameter gauge 8 is used to measure the outer diameter of the angiography catheter and transmit the data in real time to the downstream finished product collection device 11. The tractor 9 includes two upper and lower first conveyor belts 90, each of which is equipped with a second drive motor 91 for driving the first conveyor belt 90 to rotate. The tractor 9 provides a stable traction force for the angiography catheter by pressing the upper and lower parts together.

[0055] Reference Fig.11 The cutting machine 10 includes a first fixed plate 100 fixed on the base frame 1, two guide blocks 101 with through holes are fixed on one side of the first fixed plate 100, a meter counter 102 is installed on the side of the first fixed plate 100 away from the guide blocks 101, a meter wheel 103 is rotatably connected to the side of the first fixed plate 100 away from the meter counter 102, the meter wheel 103 is located between the two guide blocks 101, the meter wheel 103 is connected to the input shaft of the meter counter 102, and is rotatably connected to the base frame 1. It is connected to a swing rod 104, the top end of which is rotatably connected to a clamping wheel 105, which presses the angiographic catheter onto the meter wheel 103; the cutting machine 10 also includes a lower cutter 106 fixed to the base frame 1, a linear drive 107 is installed on the lower cutter 106, an upper cutter 108 is rotatably connected to the lower cutter 106, a push rod of the linear drive 107 is rotatably connected to the upper cutter 108, and the linear drive 107 can be a cylinder, a hydraulic cylinder or an electric telescopic rod.

[0056] According to the cutting length of the angiographic catheter, the set parameters are fed back to the meter 102, and the meter 102 sends a signal to the linear driver 107. The linear driver 107 drives the upper cutter 108 to rotate, and the upper cutter 108 and the lower cutter 106 are closed, thereby cutting the angiographic catheter to the target length.

[0057] Reference Fig.12 The finished product collecting device 11 includes a second fixed plate 110 fixed on the base frame 1, a second conveyor belt 111 is installed on one side of the second fixed plate 110, and a plurality of second gas nozzles 112 are installed on the same side of the second fixed plate 110, and the second gas nozzles 112 are located above the second conveyor belt 111. A third air compressor 113 is also installed on the base frame 1, and a third air pipe 114 is connected to the third air compressor 113, and one end of the third air pipe 114 away from the third air compressor 113 is connected to the second gas nozzle 112. A finished product collecting trough 115 is fixed on the base frame 1, and the finished product collecting trough 115 is located on the side of the second conveyor belt 111. A waste collecting trough 116 is arranged at the end of the base frame 1, and the waste collecting trough 116 is located at the end of the second conveyor belt 111.

[0058] The finished product collection device 11 determines whether the angiography catheter is a qualified product through the measurement results of the upstream laser diameter meter 8. If it is a qualified product, the third air compressor 113 works to provide gas to the second gas nozzle 112, thereby blowing the qualified product into the finished product collection tank 115. If it is an unqualified product, the third air compressor 113 does not work, so that the unqualified product falls into the waste collection tank 116.

[0059] The angiography catheter produced by the production line of the present application does not have a connecting part. The braided tube and the non-braided tube are an integrated structure, which solves the problem of breakage at the connecting part between the braided tube and the non-braided tube. In addition, the production line can realize automated mass production, thereby improving production efficiency.

[0060] The present invention is further described above with the aid of specific embodiments. However, it should be understood that the specific description here should not be construed as limiting the essence and scope of the present invention. Various modifications made to the above embodiments by ordinary technicians in the field after reading this specification are all within the scope of protection of the present invention.

Claims

1. A production line for angiography catheter, characterized in that: It comprises a base frame, on which a wire-releasing device, a braided mesh stripping device, an extruder and a traction machine are sequentially arranged, the wire-releasing device is used to provide a braided assembly for the production line, the braided mesh stripping device is used to weld and cut off part of the braided mesh on the braided assembly, the extruder is used to coat the outer layer of polymer material, and the traction machine is used to provide a stable traction force for the angiographic catheter, the braided mesh stripping device comprises a first support frame fixed on the base frame, a first laser is arranged on the first support frame, the first laser comprises a first mounting ring, a plurality of first laser heads and a plurality of first air nozzles are installed inside the first mounting ring, one first laser head and one first air nozzle are arranged close to each other as a group, two first guide rings are fixed on the first support frame, the two first guide rings are located at two ends of the first support frame, a first air compressor is also installed on the first support frame, a first air pipe is connected to the first air compressor, and an end of the first air pipe away from the first air compressor is connected to the first air nozzle; After the woven component enters the woven mesh stripping device, the first laser strips the woven mesh of the woven component. During stripping, the first laser welds the intersections of the woven mesh on the woven component and performs circular cutting at the same time. The principle is that the first laser head welds the intersections of the woven mesh, and the energy generated by the first laser head can melt the woven mesh. At the moment the woven mesh melts, the first air nozzle sprays high-pressure gas to cut off the woven mesh. After the first laser head and the first air nozzle stop working, the melted woven mesh will solidify instantly at room temperature, thereby achieving the purpose of welding and cutting the woven mesh.

2. The angiography catheter production line according to claim 1, characterized in that: The wire-releasing device includes an extension plate fixed on a base frame, a first drive motor is fixedly mounted on one side of the extension plate, a support rod is rotatably connected to a side of the extension plate facing away from the first drive motor, the support rod is fixedly connected to an output shaft of the first drive motor, an abutment plate is fixed on the support rod, a movable plate is movably arranged on the support rod, a weaving component is clamped between the abutment plate and the movable plate, a locking handle for fixing the position of the movable plate is mounted on the movable plate, a mounting rod is also fixed on the extension plate, and a guide wheel is rotatably connected to the mounting rod.

3. The angiography catheter production line according to claim 1, characterized in that: A second laser and a third laser are also provided on the first support frame. The first laser, the second laser and the third laser are arranged in sequence. The second laser includes at least three mounting plates. The three mounting plates are distributed in a ring shape. The mounting plates are arranged along the length direction of the weaving component. Each of the mounting plates is provided with a plurality of second laser heads and a plurality of second air nozzles along its own length direction. A second laser head and a second air nozzle are arranged close to each other as a group. The third laser has the same structure as the first laser. Two electric clamps are also installed on the first support frame. The two electric clamps are also located at both ends of the first support frame. The first guide ring is located on the outside of the electric clamp. Multiple first air pipes are provided. The end of the first air pipe away from the first air compressor is respectively connected to the first air nozzle and the second air nozzle. A wire storage rack for storing weaving component tube materials is provided on the base frame. The wire storage rack is located between the weaving mesh stripping device and the extruder.

4. The angiography catheter production line according to claim 3, characterized in that: The wire storage rack comprises a third supporting frame fixed to the base frame, the third supporting frame is rotatably mounted with a first fixed pulley, a second fixed pulley and a third fixed pulley, the first fixed pulley is mounted on a left end of the third supporting frame, the third fixed pulley is mounted on a right end of the third supporting frame, the second fixed pulley is located between the first fixed pulley and the third fixed pulley and is located at a top end of the third supporting frame, a plurality of wire storage grooves are provided on the second fixed pulley, the third supporting frame is rotatably connected with two connecting rods, a movable pulley is rotatably connected between the two connecting rods, the movable pulley is located below the second fixed pulley, and a plurality of wire storage grooves are also provided on the movable pulley, a spring is fixed between the connecting rod and the top of the third supporting frame, the spring drives the movable pulley to move in a direction away from the second fixed pulley, and the braiding assembly sequentially passes around the first fixed pulley, the second fixed pulley, the movable pulley and the third fixed pulley on the wire storage rack.

5. The angiography catheter production line according to claim 4, characterized in that: The third support frame is provided with an emergency stop assembly, and the emergency stop assembly includes an emergency stop button fixed to the top end of the third support frame, and a trigger plate is fixed to the connecting rod, and when the connecting rod is rotated upward to the limit position, the trigger plate touches the emergency stop button; the third support frame is also provided with a tensioning wheel, which is located between the movable pulley and the third fixed pulley and is located at the upper left of the third fixed pulley, and the tensioning wheel is vertically slidably arranged on the third support frame, and a release group for sliding the tensioning wheel downward is provided on the third support frame. Part, the release assembly includes a mounting frame, the tensioning wheel is mounted on the mounting frame, a release plate is fixed on the top of the mounting frame, a slide groove is vertically opened on the third support frame, the release plate is movably arranged in the slide groove, a receiving groove is opened on the top of the third support frame, a clamping block is arranged in the receiving groove, a clamping groove is opened on the release plate, and the clamping block is partially clamped in the clamping groove, a first fixing rod is fixed on the connecting rod, the first fixing rod is tilted upward, and a connecting rope is connected between the first fixing rod and the clamping block.

6. The angiography catheter production line according to claim 1, characterized in that: The base frame is provided with an automatic stripping device for cleaning residual woven mesh on the woven assembly, and the automatic stripping device is located between the woven mesh stripping device and the extruder. The automatic stripping device includes a second support frame fixed to the base frame, a second mounting ring is fixed to the second support frame, a plurality of brush heads are installed inside the second mounting ring, and a plurality of dust suction holes are opened on each of the brush heads. A vacuum cleaner is also installed on the second support frame, and a plurality of dust suction pipes are connected to the vacuum cleaner. An end of the dust suction pipe away from the vacuum cleaner is connected to the brush head, and the dust suction pipe is communicated with the dust suction hole.

7. The angiography catheter production line according to claim 1, characterized in that: The base frame is provided with a cooling and drying device for shaping the angiography catheter and blowing away residual water droplets, the cooling and drying device is located between the extruder and the traction machine, the cooling and drying device includes a cooling component and an air-drying component, the cooling component includes a water tank, both ends of the water tank are fixed with a second guide ring, the inside of the water tank is also installed with a supporting pulley, the air-drying component includes a collecting tank body, a second fixing rod is vertically fixed on the collecting tank body, a third guide ring and a first gas nozzle are fixed on the top of the second fixing rod, a second air compressor is installed on the outer wall of the collecting tank body, a second air pipe is connected to the second air compressor, and the end of the second air pipe away from the second air compressor is connected to the first gas nozzle.

8. The angiography catheter production line according to claim 1, characterized in that: The base frame is provided with a cutter for cutting the radiographic catheter to a target length, the cutter is located at the next station of the traction machine, the cutter comprises a first fixed plate fixed on the base frame, two guide blocks with through holes are fixed on one side of the first fixed plate, a meter is installed on the side of the first fixed plate away from the guide block, a meter wheel is rotatably connected to the side of the first fixed plate away from the meter, the meter wheel is located between the two guide blocks, the meter wheel is connected to the input shaft of the meter, a swing rod is rotatably connected to the base frame, a pressure wheel is rotatably connected to the top end of the swing rod, the pressure wheel presses the radiographic catheter onto the meter wheel; the cutter also comprises a lower cutter fixed on the base frame, a linear drive is installed on the lower cutter, an upper cutter is rotatably connected to the lower cutter, and a push rod of the linear drive is rotatably connected to the upper cutter.

9. The angiography catheter production line according to claim 8, characterized in that: The base frame is provided with a laser diameter gauge for measuring the outer diameter of the angiography catheter and a finished product collection device for screening qualified angiography catheters, the laser diameter gauge is located between the extruder and the traction machine, the finished product collection device is located at the next station of the cutting machine, the finished product collection device includes a second fixed plate fixed to the base frame, a second conveyor belt is installed on one side of the second fixed plate, a plurality of second gas nozzles are installed on the same side of the second fixed plate, the second gas nozzles are located above the second conveyor belt, a third air compressor is also installed on the base frame, a third air pipe is connected to the third air compressor, and one end of the third air pipe away from the third air compressor is connected to the second gas nozzle, a finished product collection trough is fixed on the base frame, the finished product collection trough is located on the side of the second conveyor belt, and a waste collection trough is provided at the end of the second conveyor belt.

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