Miniature conduit welding machine

Abstract

The miniature guide pipe welding machine comprises a hot air device and a to-be-welded supporting assembly, the to-be-welded supporting assembly comprises a frame body, an air outlet block, a lifting driving piece and a fixing assembly, the air outlet block is installed on the top of the frame body, a first U-shaped groove is formed in the top face of the air outlet block in a concave mode, and an air cavity is further formed in the air outlet block; the air outlet block is provided with a plurality of air outlet holes communicating with the air cavity in the groove wall of the first U-shaped groove, the lifting driving piece is installed on the frame body and connected with the fixing assembly, the fixing assembly is used for fixing the guide pipe, and the lifting driving piece drives the fixing assembly to ascend and descend so that the to-be-welded part of the guide pipe can fall into the first U-shaped groove or penetrate out of the first U-shaped groove; and when the to-be-welded part of the guide pipe falls into the first U-shaped groove, a gap is formed between the to-be-welded part of the guide pipe and the groove wall of the first U-shaped groove, the hot air device communicates with the air cavity in the air outlet block, hot air is supplied into the air cavity through the hot air device, and the guide pipe welding yield is high.

Description

Technical Field

[0001] This application relates to the technical field of catheter welding, and more specifically, to a miniature catheter welding machine. Background Technology

[0002] With the development of minimally invasive medical technology, the demand for precision welding of microcatheters (such as vascular interventional catheters and nerve conduits) is increasing. These catheters are usually made of polymer materials or composite materials and are characterized by small diameter, delicate structure, and high heat sensitivity, which places extremely high demands on the temperature control accuracy, mechanical stability, and operational efficiency of the welding process.

[0003] Currently, the welding process for microcatheters still relies on manual hot air welding. Specifically, operators use a handheld hot air gun to locally heat the joint area between two catheter sections to achieve fusion welding. This method suffers from problems such as large welding temperature fluctuations and difficulty in controlling the heat-affected zone, which can easily lead to over-melting of the catheter and a low yield. Utility Model Content

[0004] To address the current problem that the welding process for microcatheters still relies on manual hot air welding with low yield, this application provides a microcatheter welding machine.

[0005] A miniature conduit welding machine includes a hot air device and a welding support assembly. The welding support assembly includes a frame, an air outlet block, a lifting drive, and a fixing assembly. The air outlet block is installed on the top of the frame, and a first U-shaped groove is recessed on the top surface of the air outlet block. An air cavity is also provided inside the air outlet block. The air outlet block has several air outlet holes in the wall of the first U-shaped groove that communicate with the air cavity. The lifting drive is installed on the frame and connected to the fixing assembly. The fixing assembly is used to fix the conduit. The lifting drive drives the fixing assembly to move up and down so that the part of the conduit to be welded falls into or exits the first U-shaped groove. When the part of the conduit to be welded falls into the first U-shaped groove, there is a gap between it and the wall of the first U-shaped groove. The hot air device communicates with the air cavity inside the air outlet block and supplies hot air into the air cavity through the hot air device.

[0006] Preferably, a plurality of the air outlet holes are evenly arranged on the opposite sides and bottom of the first U-shaped groove.

[0007] Preferably, the fixing component includes a fixing plate and a connector. The fixing plate is fixed to the top of the connector, and the connector is connected to the lifting drive component. The top surface of the fixing plate is recessed with a second U-shaped groove, and the middle part of the fixing plate is provided with a clearance groove that penetrates its own thickness. The clearance groove is aligned with the air outlet block and avoids the air outlet block. The clearance groove divides the second U-shaped groove into two segments, and the two segments of the second U-shaped groove are aligned with the first U-shaped groove. The size of the second U-shaped groove matches the size of the duct so that the duct can be interference-fitted into place.

[0008] Preferably, the frame is provided with a vertical sliding groove, the lifting drive component is fixed in the sliding groove, and the connecting component slides through the sliding groove and is connected to the lifting drive component.

[0009] Preferably, the lifting drive component is a pneumatic cylinder, an electric cylinder, or a lead screw module.

[0010] Preferably, the hot air device includes a housing, a high-speed brushless turbine fan, a heating element, a connector, and a controller. The high-speed brushless turbine fan is disposed in the housing to provide airflow. One end of the heating element is connected to the output end of the high-speed brushless turbine fan and passes through the housing. The other end of the heating element is connected to the connector. The air outlet block has a through hole communicating with the air cavity. The connector passes through the through hole and communicates with the air cavity. The controller is fixed inside the housing. The high-speed brushless turbine fan, the heating element, and the lifting drive are all connected to the controller via wires.

[0011] Preferably, the heating tube includes a metal tube body and a heating element disposed on the metal tube body, and the heating element is connected to the controller via a wire.

[0012] Preferably, the hot air device further includes a power switch, a start switch, and a power socket, all of which are embedded in the housing and connected to the controller via wires.

[0013] Preferably, the hot air device further includes a display screen and a counter, both of which are embedded in the housing and connected to the controller via wires.

[0014] The beneficial technical effects of this application are as follows: Through the design of the air outlet holes distributed in the air cavity inside the air outlet block and the first U-shaped groove, the hot air provided by the hot air device accumulates in the first U-shaped groove to form a uniform flow field around the welding part of the guide tube, eliminating the temperature gradient problem caused by the single-point heating of the traditional hot air gun. The temperature fluctuation range of the heat-affected zone is reduced to within ±3℃, effectively avoiding over-melting or incomplete welding of the guide tube. The melting consistency of the welding surface is improved by more than 60%, resulting in a high yield. Furthermore, the use of lifting drive components in conjunction with fixing components to fix the guide tube and support the lifting of the guide tube enables the guide tube to enter or exit the first U-shaped groove quickly and accurately, avoiding the skew or shaking caused by manual adjustment, further increasing the yield of guide tube welding. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of a micro-conduit welding machine according to this embodiment.

[0016] Figure 2 This is a schematic diagram of the structure of the support assembly to be welded in this embodiment.

[0017] Figure 3 This is a schematic diagram of the air outlet block in this embodiment.

[0018] Figure 4 This is a cross-sectional view of a miniature conduit welding machine according to this embodiment.

[0019] Reference numerals: 1. Hot air device; 11. Housing; 12. High-speed brushless turbine fan; 13. Heating tube; 131. Metal tube; 132. Heating element; 133. Heat insulation cover; 134. Temperature sensor; 135. Anemometer; 14. Connector; 15. Controller; 16. Power switch; 17. Start switch; 18. Power socket; 19. Display screen; 100. Counter; 2. Support assembly to be welded; 21. Frame; 211. Slide groove; 22. Air outlet block; 221. First block; 222. Second block; 223. Air cavity; 224. First U-shaped groove; 225. Air outlet hole; 226. Through hole; 23. Lifting drive component; 24. Fixing assembly; 241. Fixing plate; 2411. Second U-shaped groove; 2412. Clearance groove; 242. Connector; Detailed Implementation

[0020] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0021] Reference Figure 1-3A miniature conduit welding machine includes a hot air device 1 and a welding support assembly 2. The welding support assembly 2 includes a frame 21, an air outlet block 22, a lifting drive component 23, and a fixing component 24. The air outlet block 22 includes a first block 221 and a second block 222. The top surface of the first block 221 is recessed with a through groove that extends through both opposite sides of the first block 221. The first block 221 has recesses on both opposite sides and the bottom surface of the through groove, and the three recesses are interconnected. The second block 222 is sized to match the through groove and is inserted into the through groove to seal the three recesses. The opening of the groove allows the three recesses to form an air chamber 223. The first block 221 and the second block 222 are welded and fixed. The top surface of the second block 222 is recessed with a first U-shaped groove 224, and the second block 222 has several air outlets 225 connected to the air chamber 223 on the groove wall of the first U-shaped groove 224. The lifting drive component 23 is installed on the frame 21 and is located on one side of the air outlet block 22. The lifting drive component 23 is connected to the fixing component 24, which is used to fix the duct. The lifting drive component 23 drives the fixing component 24 to rise and fall so that the part of the duct to be welded is... The conduit falls into or exits the first U-shaped groove 224, and when the part to be welded in the conduit falls into the first U-shaped groove 224, there is a gap between it and the groove wall of the first U-shaped groove 224. The hot air device 1 is located on the side of the air outlet block 22 away from the lifting drive component 23 and is connected to the air cavity 223. Hot air is supplied into the air cavity 223 through the hot air device 1. In this embodiment, through the design of the air outlet holes 225 distributed in the air cavity 223 inside the air outlet block 22 and the first U-shaped groove 224, the hot air device 1 provides hot air into the first U-shaped groove 224. The cohesive flow creates a uniform flow field around the welding area of ​​the duct, eliminating the temperature gradient problem caused by single-point heating of traditional hot air guns. The temperature fluctuation range of the heat-affected zone is reduced to within ±3℃, effectively avoiding over-melting or incomplete welding of the duct. The fusion uniformity of the welding surface is improved by more than 60%, resulting in a high yield. Furthermore, the use of lifting drive component 23 in conjunction with fixing component 24 to fix and support the lifting of the duct allows the duct to enter or exit the first U-shaped groove 224 quickly and accurately, avoiding skewness or vibration caused by manual adjustment, further increasing the yield of duct welding. In addition, the air outlet block 22 is designed in a split manner to facilitate the processing of the air outlet cavity 223.

[0022] Reference Figure 2 and Figure 3 Furthermore, a number of air outlets 225 are evenly arranged on the opposite sides and bottom of the first U-shaped groove 224. This arrangement of the air outlets 225 makes the temperature at each position of the first U-shaped groove 224 more uniform, thereby improving the consistency of the welding of the conduit.

[0023] Reference Figure 2Furthermore, the fixing component 24 includes a fixing plate 241 and a connector 242. The fixing plate 241 is fixed to the top of the connector 242, and the connector 242 is connected to the lifting drive component 23. The top surface of the fixing plate 241 is recessed with a second U-shaped groove 2411, and the middle of the fixing plate 241 is provided with a clearance groove 2412 that penetrates its own thickness. The clearance groove 2412 is aligned with and avoids the air outlet block 22. The clearance groove 2412 divides the second U-shaped groove 2411 into two sections, and both sections of the second U-shaped groove 2411 are connected to the first U-shaped groove 22. 4. Alignment: The size of the second U-shaped groove 2411 matches the size of the conduit, allowing the conduit to be inserted via interference fit. The conduit is positioned and fixed by interfering fit the two conduit sections into the two second U-shaped grooves 2411 respectively. The welded part of the two conduit sections is formed in the alignment first U-shaped groove 224. The conduit is fixed by interference fit between the conduit and the second U-shaped groove 2411. The structure is simple, and the conduit is easy to load and unload. In addition, the top of the two opposite side walls of the fixing plate 241 are chamfered, making it easier for the conduit to be inserted into the second U-shaped groove 2411.

[0024] Reference Figure 2 Furthermore, the frame 21 is provided with a vertical slide groove 211, the lifting drive component 23 is fixed in the slide groove 211, and the connecting component 242 slides through the slide groove 211 and connects with the lifting drive component 23. The sliding cooperation between the connecting component 242 and the slide groove 211 makes the lifting and lowering movement of the fixed component 24 more stable. The lifting drive component 23 can be a cylinder, an electric cylinder, or a lead screw module. In this embodiment, a lead screw module is selected to achieve high accuracy in the lifting displacement of the fixed component 24 and higher lifting stability.

[0025] Reference Figure 1 and Figure 4Furthermore, the hot air device 1 includes a housing 11, a high-speed brushless turbine fan 12, a heating pipe 13, a connector 14, and a controller 15. The high-speed brushless turbine fan 12 is installed inside the housing 11 to provide airflow. The housing 11 has an air inlet corresponding to the input end of the high-speed brushless turbine fan 12, through which the brushless turbine fan draws in external air to form airflow. One end of the heating pipe 13 is connected to the output end of the high-speed brushless turbine fan 12, and the heating pipe 13 passes through the housing 11. The other end of the heating pipe 13 is connected to the connector 14. The air outlet block 2... A through hole 226 is provided for the ventilation cavity 223. The connector 14 passes through the through hole 226 and communicates with the ventilation cavity 223. The airflow generated by the high-speed brushless turbine fan 12 flows into the heating pipe 13. The heating pipe 13 heats the air to form hot air, which is then output into the ventilation cavity 223. The hot air enters the first U-shaped groove 224 from the ventilation cavity 223 through the air outlet 225 and acts on the welding part of the duct to achieve welding of the duct. The high-speed brushless turbine fan 12, the heating pipe 13, and the lifting drive component 23 are all connected to the controller 15 through wires and are integrated and controlled by the controller 15. The bottom plate of the housing 11 extends towards the frame 21. The frame 21 is fixed to the bottom plate of the housing 11, so that the frame 21 and the housing 11 form an integral structure, which facilitates the overall transportation and movement of the welding machine.

[0026] Reference Figure 1 and Figure 4 Furthermore, the heating tube 13 includes a metal tube body 131 and a heating element 132 (not shown in the figure) disposed on the metal tube body 131. The heating element 132 is a resistance wire, which is uniformly wound around the outer wall of the metal tube body 131. The metal tube body 131 is covered with a heat insulation cover 133 for heat insulation. The heating element 132 is connected to the controller 15 through a wire. When the resistance wire is energized, it heats up and transfers heat to the metal tube body 131. The metal tube body 131 transfers heat to its interior to heat the airflow provided by the high-speed brushless turbine fan 12.

[0027] Reference Figure 1 and Figure 4Furthermore, the hot air device 1 also includes a power switch 16, a start switch 17, a power socket 18, a display screen 19, a counter 100, a temperature sensor 134, and an anemometer 135 embedded in the housing 11. The temperature sensor 134 (not shown in the figure) is mounted on the metal tube 131, with its probe penetrating inside the metal tube 131. The anemometer 135 (not shown in the figure) is located at the output end of the high-speed brushless turbine fan 12. The power switch 16, start switch 17, power socket 18, display screen 19, and counter 100 are all embedded in the housing 11, and the power switch 16, start switch 17, power socket 18, display screen 19, counter 100, temperature sensor 134, and anemometer 135 are all connected to the controller 15 via wires. The power socket 18 enables the controller 15 to be connected to an external power source, and the controller 15 distributes current to the high-speed brushless turbine fan 12, heating element 13, lifting drive component 23, display screen 19, and counter 100, so that each... The components are started by powering on or off the controller 15 via power switch 16, and starting and stopping the lifting drive 23 via start switch 17. Each press of start switch 17 sends feedback to counter 100 via controller 15. Counter 100 counts the number of times start switch 17 is pressed, making it easy for staff to know the number of welding conduits. Display screen 19 displays the temperature sensed by temperature sensor 134 and the wind speed measured by anemometer 135. Temperature sensor 134 is a thermistor sensor, and anemometer 135 is an electronic impeller anemometer. Display screen 19 also integrates temperature and wind speed adjustment buttons. Temperature is adjusted by adjusting the current flowing into heating element 132 via temperature adjustment button, and wind speed is adjusted by adjusting the voltage applied to high-speed brushless turbine fan 12 via wind speed adjustment button. Display screen 19 and integrated temperature and wind speed adjustment buttons allow users to adjust temperature and wind speed parameters for different products.

[0028] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A miniature conduit welding machine, characterized in that: The device includes a hot air unit and a welding support assembly. The welding support assembly includes a frame, an air outlet block, a lifting drive, and a fixing assembly. The air outlet block is installed on the top of the frame, and a first U-shaped groove is recessed on the top surface of the air outlet block. An air cavity is also provided inside the air outlet block. The air outlet block has several air outlet holes in the wall of the first U-shaped groove that communicate with the air cavity. The lifting drive is installed on the frame and connected to the fixing assembly. The fixing assembly is used to fix the duct. The lifting drive drives the fixing assembly to move up and down so that the part of the duct to be welded falls into or exits the first U-shaped groove. When the part of the duct to be welded falls into the first U-shaped groove, there is a gap between it and the wall of the first U-shaped groove. The hot air unit communicates with the air cavity inside the air outlet block and supplies hot air into the air cavity through the hot air unit.

2. The micro-catheter welding machine according to claim 1, characterized in that: Several of the air outlet holes are evenly arranged on the opposite sides and bottom of the first U-shaped groove.

3. A miniature catheter welding machine according to claim 1, characterized in that: The fixing component includes a fixing plate and a connector. The fixing plate is fixed to the top of the connector. The connector is connected to the lifting drive component. The top surface of the fixing plate is recessed with a second U-shaped groove, and the middle part of the fixing plate is provided with a clearance groove that penetrates its own thickness. The clearance groove is aligned with the air outlet block and avoids the air outlet block. The clearance groove divides the second U-shaped groove into two sections, and the two sections of the second U-shaped groove are aligned with the first U-shaped groove. The size of the second U-shaped groove matches the size of the duct so that the duct can be interference-fitted into place.

4. A miniature catheter welding machine according to claim 3, characterized in that: The frame is provided with a vertical sliding groove, the lifting drive component is fixed in the sliding groove, and the connecting component slides through the sliding groove and is connected to the lifting drive component.

5. A miniature catheter welding machine according to claim 1, characterized in that: The lifting drive component is a pneumatic cylinder, an electric cylinder, or a lead screw module.

6. A miniature catheter welding machine according to claim 1, characterized in that: The hot air device includes a housing, a high-speed brushless turbine fan, a heating element, a connector, and a controller. The high-speed brushless turbine fan is installed inside the housing to provide airflow. One end of the heating element is connected to the output end of the high-speed brushless turbine fan and passes through the housing. The other end of the heating element is connected to the connector. The air outlet block has a through hole communicating with the air cavity. The connector passes through the through hole and communicates with the air cavity. The controller is fixed inside the housing. The high-speed brushless turbine fan, the heating element, and the lifting drive are all connected to the controller via wires.

7. A miniature catheter welding machine according to claim 6, characterized in that: The heating tube includes a metal tube body and a heating element disposed on the metal tube body. The heating element is connected to the controller via a wire.

8. A miniature catheter welding machine according to claim 6, characterized in that: The hot air device also includes a power switch, a start switch, and a power socket. The power socket, start switch, and power switch are all embedded in the housing. The power socket is connected to the power switch via a wire, the power switch is connected to the controller via a wire, and the start switch is connected to the controller via a wire.

9. A miniature catheter welding machine according to claim 6, characterized in that: The hot air device also includes a display screen and a counter, both of which are embedded in the housing and connected to the controller via wires.

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