Medical catheter surface heat treatment device

Abstract

The utility model relates to a medical catheter surface heat treatment device which comprises a working table, a front guide assembly, a heat treatment assembly and a rear guide assembly are sequentially arranged on the working table in the routing direction of a medical catheter, the front guide assembly is matched with a medical catheter extruder, and the heat treatment assembly comprises a heating piece and a polishing piece. The heating piece is provided with a heat conduction hole for the medical catheter to penetrate through, the polishing piece is provided with a polishing hole, the heat conduction hole and the polishing hole are arranged along a straight line, the medical catheter is wired along the heat conduction hole and the polishing hole, the surface of the medical catheter is in sliding contact with the inner wall of the polishing hole, and the heating piece heats the medical catheter moving along the heat conduction hole. And the inner wall of the polishing hole is used for polishing the surface of the medical catheter. The medical catheter surface heat treatment device is installed on an extrusion production line of an extruder, online surface heat treatment is carried out on the medical catheter formed through extrusion, the plastic surface on the medical catheter can become soft after being heated, plastic polishing is convenient, and the polished medical catheter surface has good smoothness.

Description

Technical Field

[0001] This utility model relates to the field of medical catheter manufacturing technology, and in particular to a medical catheter surface heat treatment device. Background Technology

[0002] In the production process of medical contrast catheters, the medical contrast catheter adopts a three-layer structure consisting of an inner liner, a braided layer, and an outer covering layer. The inner liner and outer covering layer are made of one or more plastic materials selected from polytetrafluoroethylene, polyurethane, polyethylene, nylon, and polyoxymethylene through extrusion molding. Because the surface of the braided layer is uneven, the plastic materials cannot be evenly filled on the braided layer during the extrusion process, resulting in an uneven surface of the extruded medical contrast catheter, and even burrs, which leads to the surface smoothness of the medical contrast catheter not meeting the standards.

[0003] Therefore, existing medical contrast catheter production lines use manual methods to process the surface of each cut medical contrast catheter individually to ensure that the surface smoothness of the medical contrast catheter meets the requirements. However, the single-catheter processing method has low production efficiency. At the same time, the manual operation is prone to uneven heating and processing speed of the medical contrast catheter, which leads to inconsistency problems and affects the quality of the medical contrast catheter. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a medical catheter surface heat treatment device for performing surface heat treatment on braided medical contrast catheters to improve the surface smoothness of the medical contrast catheters.

[0005] This utility model provides a heat treatment device for the surface of a medical catheter, including a worktable. A front guide assembly, a heat treatment assembly, and a rear guide assembly are sequentially arranged on the worktable along the direction of the medical catheter. The front guide assembly cooperates with a medical catheter extruder. The heat treatment assembly includes a heating element and a polishing element. The heating element has a heat-conducting hole through which the medical catheter passes, and the polishing element has a polishing hole. The heat-conducting hole and the polishing hole are arranged in a straight line. The medical catheter runs along the heat-conducting hole and the polishing hole, and the surface of the medical catheter slides in contact with the inner wall of the polishing hole. The heating element heats the medical catheter moving along the heat-conducting hole, and the inner wall of the polishing hole polishes the surface of the medical catheter.

[0006] In some embodiments, the heat treatment assembly further includes a base, a cover plate, and a positioning block. A fixing hole matching the shape of the heating element is provided between the base and the cover plate. The heating element is installed in the fixing hole. The base is provided with a positioning block and a polishing element at both ends of the heating element along the axial direction. The positioning block and the polishing element are respectively fixed on the first step and the second step of the base. The positioning block and the polishing element restrict the heating element in the axial direction.

[0007] In some embodiments, the heating element includes a heat-conducting inner cylinder and a heating sleeve. The heating sleeve is fitted around the outer circumference of the heat-conducting inner cylinder. A heat-conducting hole is provided through the axis of the heat-conducting inner cylinder. The polishing element is provided with a positioning groove that matches the shape of the heat-conducting inner cylinder. One end of the heat-conducting inner cylinder is embedded in the positioning groove. The polishing hole communicates with the positioning groove.

[0008] In some embodiments, the cover plate is provided with a clearance groove at the position where the power line of the heating sleeve is led out, and a clamp is fixed above the positioning block. The clamp is provided with a clamping hole for positioning the power line, and the clamping hole communicates with the clearance groove.

[0009] In some embodiments, the positioning block is provided with a clearance hole at the inlet of the heat-conducting hole, and the diameter of the clearance hole is larger than the diameter of the heat-conducting hole.

[0010] In some embodiments, the diameter of the heat-conducting hole is larger than the outer diameter of the medical catheter before polishing, and the diameter of the polishing hole is smaller than the outer diameter of the medical catheter before polishing.

[0011] In some embodiments, the worktable is vertically fixed with a support plate, the front guide assembly, the heat treatment assembly, and the rear guide assembly are installed along a straight line on one side of the support plate, a frame is provided below the worktable, and a height adjustment assembly is provided between the frame and the worktable to adjust the height of the worktable.

[0012] In some embodiments, both the front guide assembly and the rear guide assembly include a non-powered lower wheel assembly and an upper wheel assembly, with the medical catheter running between the lower wheel assembly and the upper wheel assembly.

[0013] In some embodiments, a clamping assembly is provided between the front guide assembly and the heat treatment assembly. The clamping assembly includes an upper clamping wheel and a lower clamping wheel. The medical catheter runs between the upper clamping wheel and the lower clamping wheel. The lower clamping wheel is mounted on one side of the upright plate. The upper clamping wheel is movably mounted on one side of the upright plate via an upper clamping seat. A first guide rod and a first adjusting screw are provided between the upper clamping seat and the upright plate. The first adjusting screw drives the upper clamping seat to move along the first guide rod to adjust the distance between the upper clamping wheel and the lower clamping wheel.

[0014] In some embodiments, both the upper and lower clamping rollers are rubber rollers.

[0015] Compared with the prior art, the beneficial effects of this utility model are: the medical catheter surface heat treatment device is installed on the extrusion production line of the extruder to perform online surface heat treatment on the extruded medical catheter. First, the medical catheter is heated by the heating element, and the plastic surface on the medical catheter will soften after heating, which is convenient for plastic polishing. Then, the softened plastic surface is squeezed and polished through the polishing hole of the polishing element, which improves production efficiency and consistency. The surface of the medical catheter after polishing has a better smoothness. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural schematic diagram of a medical catheter surface heat treatment device according to an embodiment of this application.

[0017] Figure 2 This is a three-dimensional structural diagram of the heat treatment component according to an embodiment of this application.

[0018] Figure 3 This is a cross-sectional structural diagram of the heat treatment component according to an embodiment of this application.

[0019] Figure 4 This is an exploded structural diagram of the heat treatment component according to an embodiment of this application.

[0020] Attached image label: 101, Medical catheter;

[0021] 1. Workbench; 11. Vertical plate; 12. Frame; 13. Second guide rod; 14. Second adjusting screw; 15. Temperature controller;

[0022] 2. Heat treatment components;

[0023] 3. Base; 31. Fixing hole; 32. First step; 33. Second step;

[0024] 4. Cover plate; 41. Leaving groove;

[0025] 5. Positioning block; 51. Clearance hole; 52. Clamping seat; 53. Clamping hole;

[0026] 6. Heating element; 61. Heat-conducting inner cylinder; 62. Heat-conducting hole; 63. Heating jacket; 64. Power line;

[0027] 7. Polished parts; 71. Polishing holes; 72. Positioning grooves;

[0028] 8. Clamping assembly; 81. Upper clamping roller; 82. Lower clamping roller; 83. Upper pressure seat; 84. First guide rod; 85. First adjusting screw;

[0029] 91. Rear guide assembly; 92. Front guide assembly; 93. Lower wheel assembly; 94. Upper wheel assembly. Detailed Implementation

[0030] The specific embodiments of this utility model are described with reference to the accompanying drawings.

[0031] refer to Figure 1 The figure shows a three-dimensional structural diagram of a medical catheter surface heat treatment device. The bottom is a frame 12, and the top of the frame 12 is a worktable 1. The worktable 1 is arranged with a front guide assembly 92, a heat treatment assembly 2, and a rear guide assembly 91 in sequence along the routing direction of the medical catheter 101. The medical catheter 101 is extruded from the extruder, then cooled and dried in a water tank, and then initially guided by the front guide assembly 92. Next, it is heated and polished at the heat treatment assembly 2, and finally guided to the next process by the rear guide assembly 91, thus realizing the online surface heat treatment of the medical catheter 101. The medical catheter surface heat treatment device of this utility model is for surface heat treatment of braided medical catheters 101, especially medical angiography catheters.

[0032] refer to Figures 1 to 4 A heat treatment device for the surface of a medical catheter includes a worktable 1. The worktable 1 is arranged in sequence along the routing direction of the medical catheter 101, including a front guide assembly 92, a heat treatment assembly 2, and a rear guide assembly 91. The front guide assembly 92 cooperates with the extruder of the medical catheter 101. The heat treatment assembly 2 includes a heating element 6 and a polishing element 7. The heating element 6 is provided with a heat-conducting hole 62 for the medical catheter 101 to pass through. The polishing element 7 is provided with a polishing hole 71. The heat-conducting hole 62 and the polishing hole 71 are arranged in a straight line. The medical catheter 101 runs along the heat-conducting hole 62 and the polishing hole 71. The surface of the medical catheter 101 slides in contact with the inner wall of the polishing hole 71. The heating element 6 heats the medical catheter 101 that moves along the heat-conducting hole 62. The inner wall of the polishing hole 71 polishes the surface of the medical catheter 101.

[0033] The medical catheter surface heat treatment device of this application is installed on the extrusion production line of the extruder to perform online surface heat treatment on the extruded medical catheter 101. First, the medical catheter 101 is heated by the heating element 6. The plastic surface on the medical catheter 101 softens after heating, which facilitates plastic polishing. Then, the softened plastic surface is extruded and polished through the polishing hole 71 of the polishing element 7, which improves production efficiency and consistency. The surface of the medical catheter 101 after polishing has a good smoothness.

[0034] In order to achieve heat treatment of the medical catheter 101, in this embodiment, reference is made to... Figures 2 to 4 The heat treatment assembly 2 also includes a base 3, a cover plate 4, and a positioning block 5. A fixing hole 31 matching the shape of the heating element 6 is provided between the base 3 and the cover plate 4. The heating element 6 is installed in the fixing hole 31. The base 3 is provided with a positioning block 5 and a polishing part 7 at both ends of the heating element 6 in the axial direction. The positioning block 5 and the polishing part 7 are fixed on the first step 32 and the second step 33 of the base 3, respectively. The positioning block 5 and the polishing part 7 restrict the heating element 6 in the axial direction.

[0035] Understandably, with this configuration, the first step 32 and the second step 33 of the base 3 are respectively equipped with positioning blocks 5 and polishing parts 7. Positioning blocks 5 and polishing parts 7 position the heating element 6 in the axial direction, restrict the heating element 6 in the axial direction, prevent the heating element 6 from axially displacing during operation, and ensure that the heating element 6 stably heats the medical catheter 101.

[0036] To accommodate medical catheters 101 of different diameters, in this embodiment, reference is made to... Figures 2 to 4 The heating element 6 includes a heat-conducting inner cylinder 61 and a heating sleeve 63. The heating sleeve 63 is fitted on the outer circumference of the heat-conducting inner cylinder 61. A heat-conducting hole 62 is provided through the axis of the heat-conducting inner cylinder 61. The polishing element 7 is provided with a positioning groove 72 that matches the shape of the heat-conducting inner cylinder 61. One end of the heat-conducting inner cylinder 61 is embedded in the positioning groove 72. The polishing hole 71 communicates with the positioning groove 72.

[0037] It should be further explained that medical catheters 101 with different wire diameters require different sizes of heat-conducting holes 62 and polishing holes 71, which requires replacing the corresponding heat-conducting inner cylinder 61 and polishing parts 7. The heat-conducting inner cylinder 61 and the heating sleeve 63 have a detachable installation structure. The cover plate 4 fixes the heating sleeve 63 to the base 3. When replacing the heat-conducting inner cylinder 61, the heating sleeve 63 does not need to be disassembled. After removing the polishing parts 7, the heat-conducting inner cylinder 61 can be removed from the heating sleeve 63. After replacing the new heat-conducting inner cylinder 61, the polishing parts 7 are fixed to the base 3 with bolts to fix the heat-conducting inner cylinder 61. The whole replacement process is not complicated and the replacement efficiency is relatively fast.

[0038] Understandably, with this setup, the heating jacket 63 is connected to an external temperature controller 15 via an electric power line 64. The temperature controller 15 controls the heat generated by the heating jacket 63. The heat generated by the heating jacket 63 is transferred to the heat-conducting inner cylinder 61, which then transfers the heat to the medical catheter 101 inside the heat-conducting hole 62, heating the medical catheter 101. One end of the heat-conducting inner cylinder 61 is embedded in the positioning groove 72, so that the medical catheter 101 is directly polished through the polishing hole 71 after being heated by the heat-conducting hole 62. The heating and polishing are seamlessly connected. Moreover, the heat-conducting inner cylinder 61 transfers some heat to the polishing part 7, making the temperature of the medical catheter 101 relatively stable during polishing and ensuring the quality of polishing.

[0039] It should be further explained that the polishing hole 71 needs to be selected with appropriate length and diameter according to the characteristics of the material. The length of the polishing hole 71 is used to control the polishing time, and the diameter of the polishing hole 71 is used to control the polishing force to avoid excessive polishing that would reduce the surface roughness or make the material thinner. At the same time, it is necessary to ensure that the surface of the medical catheter 101 is free of scratches and spots after polishing.

[0040] To avoid interference with the medical catheter 101 at the workbench 1, in this embodiment, reference is made to... Figure 3 The cover plate 4 has a relief groove 41 at the position where the power line 64 is led out of the heating sleeve 63. A clamp 52 is fixed above the positioning block 5. The clamp 52 has a clamping hole 53 for positioning the power line 64. The clamping hole 53 communicates with the relief groove 41.

[0041] Understandably, with this setup, the power line 64 is clamped and fixed by the clamp 52, preventing the power line 64 from shaking and ensuring that the power line 64 will not interfere with the routing of the medical catheter 101. At the same time, it prevents the power line 64 from coming into contact with the base 3, which has a high temperature, thus ensuring the safety of the power line 64.

[0042] To avoid the positioning block 5 interfering with the routing of the medical catheter 101, in this embodiment, reference is made to... Figure 2 The positioning block 5 has a clearance hole 51 at the inlet of the heat conduction hole 62, and the diameter of the clearance hole 51 is larger than the diameter of the heat conduction hole 62.

[0043] Understandably, with this setup, the positioning block 5 needs to axially restrict the heating element 6 and make way for the medical catheter 101 through the clearance hole 51 to prevent the medical catheter 101 from colliding with the positioning block 5. The clearance hole 51 has a large diameter and is suitable for medical catheters 101 of different wire diameters.

[0044] In order to polish the surface of the medical catheter 101, in this embodiment, reference is made to... Figure 3 The diameter of the heat conduction hole 62 is larger than the outer diameter of the medical catheter 101 before polishing, and the diameter of the polishing hole 71 is smaller than the outer diameter of the medical catheter 101 before polishing.

[0045] Understandably, with this setup, the heat-conducting hole 62 needs to be of a certain length to heat the medical catheter 101. The heat-conducting hole 62 cannot be too small. There is a gap between the surface of the medical catheter 101 and the inner wall of the heat-conducting hole 62 to prevent the inner wall of the heat-conducting hole 62 from squeezing the medical catheter 101. After being heated, the medical catheter 101 will soften and then be polished through the polishing hole 71. The length and diameter of the polishing hole 71 control the polishing time and polishing force, respectively. The polishing hole 71, which is smaller than the outer diameter of the medical catheter 101, can apply appropriate pressure to the surface of the medical catheter 101 during the polishing process to ensure the polishing effect.

[0046] To adapt to the preceding and following production equipment, in this embodiment, reference is made to... Figure 1 The workbench 1 is vertically fixed with a vertical plate 11. The front guide assembly 92, the heat treatment assembly 2 and the rear guide assembly 91 are installed along a straight line on one side of the vertical plate 11. A frame 12 is provided below the workbench 1. A height adjustment assembly is provided between the frame 12 and the workbench 1. The height adjustment assembly adjusts the height of the workbench 1.

[0047] Understandably, with this setup, the frame 12 is equipped with a temperature controller 15, which is connected to the heating jacket 63 via a power line 64. The frame 12 controls the height of the worktable 1 via a height adjustment assembly, which includes a second guide rod 13 and a second adjusting screw 14 with a handle. By rotating the second adjusting screw 14 with the handle, the height of the worktable 1 can be controlled, allowing the worktable 1 to be adjusted according to actual needs to accommodate extruders and medical catheter 101 cutting machines of different heights.

[0048] To stably guide the medical catheter 101, in this embodiment, reference is made to... Figure 1 Both the front guide assembly 92 and the rear guide assembly 91 include a lower wheel assembly 93 and an upper wheel assembly 94 that are not driven by a power source, and the medical catheter 101 runs between the lower wheel assembly 93 and the upper wheel assembly 94.

[0049] Understandably, with this setup, neither the lower wheel group 93 nor the upper wheel group 94 is powered, which avoids generating significant resistance to the routing of the medical catheter 101. At the same time, it effectively guides the medical catheter 101 along the predetermined path. Through the cooperation of the lower wheel group 93 and the upper wheel group 94, the routing of the medical catheter 101 is well supported and guided, ensuring that the medical catheter 101 can route stably.

[0050] To stabilize the tension of the medical catheter 101, in this embodiment, reference is made to... Figure 1 A clamping assembly 8 is provided between the front guide assembly 92 and the heat treatment assembly 2. The clamping assembly 8 includes an upper clamping wheel 81 and a lower clamping wheel 82. The medical catheter 101 runs between the upper clamping wheel 81 and the lower clamping wheel 82. The lower clamping wheel 82 is installed on one side of the upright plate 11. The upper clamping wheel 81 is movably mounted on one side of the upright plate 11 via an upper clamping seat 83. A first guide rod 84 and a first adjusting screw 85 are provided between the upper clamping seat 83 and the upright plate 11. The first adjusting screw 85 drives the upper clamping seat 83 to move along the first guide rod 84 to adjust the distance between the upper clamping wheel 81 and the lower clamping wheel 82.

[0051] Understandably, with this configuration, the upper clamping roller 81 and the lower clamping roller 82 press the medical catheter 101 tightly, keeping the tension of the medical catheter 101's wiring stable, allowing the medical catheter 101 to undergo surface heat treatment at a stable speed, ensuring the polishing effect of the medical catheter 101. The distance between the upper clamping roller 81 and the lower clamping roller 82 is adjusted by the first adjusting screw 85 to accommodate medical catheters 101 with different outer diameters.

[0052] To avoid damage to the medical catheter 101, in this embodiment, reference is made to Figure 1 Both the upper clamping wheel 81 and the lower clamping wheel 82 are rubber wheels.

[0053] It should be further explained that both the upper clamping roller 81 and the lower clamping roller 82 are rubber rollers, which can avoid scratching the surface of the medical catheter 101, while providing appropriate friction to ensure the tension stability of the medical catheter 101.

[0054] The medical catheter surface heat treatment apparatus of this application performs surface heat treatment on the medical catheter 101 through the heat treatment component 2. The heating element 6 heats and softens the plastic surface of the medical catheter 101, making the plastic surface more malleable and easier to polish. The surface of the medical catheter 101 is mechanically squeezed through the polishing hole 71 to remove defects and unevenness from the surface of the medical catheter 101, ensuring that the surface smoothness of the medical catheter 101 meets the standards and improving the appearance quality of the medical catheter 101. The online heat treatment method can improve production efficiency, reduce production costs, and achieve high consistency in polishing of the medical catheter 101, thus reducing the defect rate.

[0055] The above does not limit the technical scope of this utility model. Any modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of this utility model shall still fall within the scope of the technical solution of this utility model.

Claims

1. A medical catheter surface heat treatment apparatus, characterized by, The workbench is sequentially provided with a front guide assembly, a heat treatment assembly and a rear guide assembly along the medical catheter routing direction, the front guide assembly is matched with a medical catheter extruder, the heat treatment assembly comprises a heating piece and a polishing piece, the heating piece is provided with a heat conduction hole through which the medical catheter passes, the polishing piece is provided with a polishing hole, the heat conduction hole and the polishing hole are arranged along a straight line, the medical catheter is routed along the heat conduction hole and the polishing hole, the surface of the medical catheter is in sliding contact with the inner wall of the polishing hole, the heating piece heats the medical catheter moving along the heat conduction hole, and the inner wall of the polishing hole polishes the surface of the medical catheter.

2. The medical catheter surface heat treatment apparatus according to claim 1, wherein The heat treatment assembly further comprises a base, a cover plate and a positioning block, the base and the cover plate are provided with a fixed hole matched with the shape of the heating piece, the heating piece is installed in the fixed hole, the base is provided with the positioning block and the polishing piece at both ends of the heating piece in the axial direction, the positioning block and the polishing piece are fixed on the first step and the second step of the base respectively, and the positioning block and the polishing piece limit the heating piece in the axial direction.

3. The medical catheter surface heat treatment apparatus of claim 2, wherein, The heating piece comprises a heat conduction inner cylinder and a heating sleeve, the heating sleeve is sleeved on the outer circumference of the heat conduction inner cylinder, the heat conduction hole is arranged at the axis of the heat conduction inner cylinder, the polishing piece is provided with a positioning groove matched with the shape of the heat conduction inner cylinder, and one end of the heat conduction inner cylinder is embedded in the positioning groove.

4. The medical catheter surface heat treatment apparatus of claim 3, wherein, The cover plate is provided with a clearance groove at the position where the heating sleeve leads out the power line, the positioning block is fixed with a clamping seat above, the clamping seat is provided with a clamping hole for positioning the power line, and the clamping hole is communicated with the clearance groove.

5. The medical catheter surface heat treatment apparatus of claim 2, wherein, The positioning block is provided with an avoidance hole at the inlet of the heat conduction hole, and the aperture of the avoidance hole is larger than that of the heat conduction hole.

6. The medical catheter surface heat treatment apparatus of claim 2, wherein, The aperture of the heat conduction hole is larger than the outer diameter of the medical catheter before polishing, and the aperture of the polishing hole is smaller than the outer diameter of the medical catheter before polishing.

7. The medical catheter surface heat treatment apparatus of claim 1, wherein, The workbench is vertically fixed with a vertical plate, the front guide assembly, the heat treatment assembly and the rear guide assembly are installed on one side of the vertical plate along a straight line, the workbench is provided with a rack below, the rack and the workbench are provided with a height adjusting assembly, and the height adjusting assembly adjusts the height of the workbench.

8. The medical catheter surface heat treatment apparatus of claim 7, wherein, The front guide assembly and the rear guide assembly each comprise a lower wheel set and an upper wheel set without power driving, and the medical catheter is routed between the lower wheel set and the upper wheel set.

9. The medical catheter surface heat treatment apparatus of claim 1, wherein, The front guide assembly and the heat treatment assembly are provided with a pressing assembly, the pressing assembly comprises an upper pressing wheel and a lower pressing wheel, the medical catheter is routed between the upper pressing wheel and the lower pressing wheel, the lower pressing wheel is installed on one side of the vertical plate, the upper pressing wheel is movably arranged on one side of the vertical plate through an upper pressing seat, the upper pressing seat and the vertical plate are provided with a first guide rod and a first adjusting screw rod, the first adjusting screw rod drives the upper pressing seat to move along the first guide rod to adjust the distance between the upper pressing wheel and the lower pressing wheel.

10. The medical catheter surface heat treatment apparatus of claim 9, wherein, The upper pressing wheel and the lower pressing wheel are rubber wheels.

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