A medical catheter liner mandrel removal device

Abstract

This utility model discloses a medical catheter liner mandrel removal device, comprising: an outer frame with a vertically arranged slide rail, on which a mandrel clamping module and a product clamping module are installed; the mandrel clamping module includes a collet, with a sensor installed above the collet; the product clamping module includes a clamping block, with a drive cylinder on one side of the clamping block. This utility model uses a vertical slide rail, effectively reducing workshop space occupancy and improving production efficiency; the collet is driven by a pneumatic clamp to clamp the end of the mandrel, and a force sensor, in conjunction with a drive motor, achieves closed-loop control operation. The drive slide module moves the pneumatic clamp according to a preset process to pull and remove the mandrel, and the friction force is detected and the pulling speed is adjusted in real time, effectively improving the yield rate; multiple sets of movable clamping blocks are driven by a drive cylinder to tighten the clamping blocks and hold the catheter, and the clamping force and friction force are adjusted with the inner flexible pads, which can adapt to various catheter sizes and models.

Description

Technical Field

[0001] This utility model relates to the field of catheter processing equipment technology, specifically to a medical catheter liner mandrel removal device. Background Technology

[0002] Currently, in the manufacturing process of interventional medical catheters, when spring winding, braiding and rheological processes are involved, at least one support mandrel is often added inside the catheter to ensure the accuracy of the internal dimensions of the catheter in order to provide a certain inner diameter support. Therefore, after the spring winding, braiding and rheological processes are completed, the original support mandrel needs to be removed.

[0003] The existing processing method involves manually clamping the extended end of the mandrel using horizontal tooling or a winch and then pulling the mandrel out of the guide tube. Because different product specifications require different production processes, the pulling force required to pull the mandrel varies. Therefore, it is difficult to accurately control the pulling force and the pulling speed, which can easily lead to damage to the guide tube during the mandrel extraction process (including increased pitch in the braided or coiled wires, bending, whitening, or breakage of the tube surface), resulting in high time and material costs. Furthermore, since the standard product length is 1.2m-2m, and each workstation requires at least 4m of operating space, the workshop resource utilization and extraction efficiency are low. Utility Model Content

[0004] The purpose of this invention is to provide a medical catheter liner mandrel removal device to solve the above problems.

[0005] To achieve the above objectives, this utility model specifically adopts the following technical solution, including:

[0006] The outer frame is vertically provided with a slide rail, on which a mandrel clamping module and a product clamping module are installed;

[0007] The mandrel clamping module includes a collet, and a sensor is installed above the collet. The sensor is used to detect and control the pulling force of the collet on the mandrel.

[0008] The product clamping module includes a clamping block, and a driving cylinder is provided on one side of the clamping block. The driving cylinder is used to drive the clamping block to fix the guide tube.

[0009] As a further description of the above technical solution, the chute track includes a first track and a second track, a linear transmission module is installed on the first track, and a product clamping module is installed on the second track.

[0010] As a further description of the above technical solution, the linear transmission module includes a slide module, and a drive motor is provided at the end of the slide module.

[0011] As a further description of the above technical solution, a connecting plate is fixed on the top of the slide module, and a mounting plate is provided on the connecting plate.

[0012] As a further description of the above technical solution, a pneumatic clamp is installed at the bottom of the mounting plate, and a clamp button is provided on the outside of the mounting plate.

[0013] As a further description of the above technical solution, the pneumatic clamp has a collet held at the bottom and a sensor provided at the top.

[0014] As a further description of the above technical solution, the clamping block includes a movable end clamping block and a fixed end clamping block. Flexible pads are provided on the inner sides of the fixed end clamping block and the movable end clamping block, and a tightening handle is provided on the outer side of the fixed end clamping block.

[0015] As a further description of the above technical solution, a mounting base is provided on the outer side of the mobile end clamping block, a drive cylinder is provided on the mounting base, and a cylinder guide rod is installed through the end of the mobile end clamping block.

[0016] As a further description of the above technical solution, a control box is provided on one side of the outer frame, and the control box is electrically connected to the drive motor, sensor and drive cylinder.

[0017] As a further description of the above technical solution, the control box is equipped with a touch screen, and a pressure gauge and a pressure regulating valve are arranged below the touch screen.

[0018] The beneficial effects of this utility model are as follows:

[0019] 1. This utility model uses a vertical slide rail to install the mandrel clamping module and the product clamping module, which effectively reduces the space occupancy rate of the workshop and improves production efficiency;

[0020] 2. In this utility model, a pneumatic clamp drives a collet to hold the end of the mandrel. A force sensor, in conjunction with a drive motor, achieves closed-loop control operation. The drive slide module moves the pneumatic clamp according to a preset process to pull and remove the mandrel. The friction force is detected in real time and the pulling speed is adjusted to avoid damage to the guide tube and effectively improve the yield rate.

[0021] 3. In this utility model, multiple sets of movable clamping blocks are driven by a cylinder to tighten the clamping blocks and clamp the conduit. The clamping force and friction are adjusted by the flexible pads on the inner side, which can be adapted to a variety of conduits of different sizes.

[0022] To more clearly illustrate the structural features and functions of this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of the medical catheter liner mandrel removal device of this utility model. Figure 1 ;

[0024] Figure 2 This is the main view of the catheter liner mandrel removal device of this utility model. Figure 1 ;

[0025] Figure 3 This is a schematic diagram of the structure of the medical catheter liner mandrel removal device of this utility model. Figure 2 ;

[0026] Figure 4 This is the main view of the catheter liner mandrel removal device of this utility model. Figure 2 ;

[0027] Figure 5 This is a side view of the catheter liner mandrel removal device of this utility model;

[0028] Figure 6 This is a top view of the catheter liner mandrel removal device of this utility model;

[0029] Figure 7 yes Figure 3 Enlarged view of point A in the middle;

[0030] Figure 8 yes Figure 3 Enlarged diagram of point B in the middle.

[0031] Figure label:

[0032] 1. Outer frame; 11. Slide rail; 111. First rail; 112. Second rail; 2. Mandrel clamping module; 21. Collet clamp; 22. Sensor; 23. Connecting plate; 24. Mounting plate; 25. Pneumatic clamp; 26. Clamping button; 3. Product clamping module; 31. Clamping block; 311. Moving end clamping block; 312. Fixed end clamping block; 32. Drive cylinder; 33. Flexible gasket; 34. Tightening handle; 35. Mounting base; 36. Cylinder guide rod; 4. Linear transmission module; 41. Slide table module; 42. Drive motor; 5. Control box; 51. Touch screen; 52. Pressure gauge; 53. Pressure regulating valve. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0034] like Figures 1-8As shown, in one embodiment, a medical catheter liner mandrel removal device includes: an outer frame 1, which has sufficient load-bearing capacity and deformation resistance to stably support the weight of each module and the impact force generated during operation; a slide rail 11 is vertically arranged on the outer frame 1, and a mandrel clamping module 2 and a product clamping module 3 are installed on different slide rails 11 to ensure the smoothness and positional accuracy of the mandrel clamping module 2 and the product clamping module 3 installed thereon during the movement.

[0035] The slide rail 11 includes a first rail 111 and a second rail 112. A linear transmission module 4 is installed on the first rail 111, while a product clamping module 3 is installed on the second rail 112.

[0036] Understandably, the use of vertical slide rails 11 to install the spindle clamping module 2 and product clamping module 3 significantly reduces the horizontal footprint of the equipment in the workshop compared to the traditional horizontal structure. This is especially suitable for scenarios with limited production space, effectively reducing the workshop's space occupancy rate. Furthermore, multiple operating stations can be set up according to production needs, and multiple operating stations can be flexibly added as needed. Synchronous operation or assembly line production can be achieved between the stations, thereby greatly improving the overall production efficiency.

[0037] Please continue reading. Figures 1-8 In this embodiment, the linear transmission module 4 includes a slide module 41, and a drive motor 42 is provided at the end of the slide module 41.

[0038] For example, the slide module 41 adopts a track-embedded slide module 41. The drive motor 42 at the end drives the ball screw inside the slide module 41 to rotate through a coupling or synchronous pulley. The balls roll between the spiral groove of the screw and the spiral groove of the nut, thereby driving the nut to move along the axial direction of the screw. This causes the slide and the mandrel clamping module 2 connected to the nut to reciprocate linear motion. Through the high precision characteristics of the ball screw and the guiding effect of the guide rail, the slide module 41 can achieve high precision and high stability linear motion, thereby smoothly removing the mandrel from the inside of the guide tube at a preset pulling speed.

[0039] Furthermore, the mandrel clamping module 2 includes a collet 21, and a sensor 22 is installed on the top of the collet 21 to detect and control the pulling force value of the collet 21 on the mandrel;

[0040] It should be noted that a connecting plate 23 is fixed to the top of the slide module 41 to ensure the rigidity of the connection; a mounting plate 24 is provided on the connecting plate 23 for mounting the spindle clamping module 2; a clamp button 26 is provided on the outside of the mounting plate 24 for driving the pneumatic clamp 25 to work, realizing the manual operation of clamping and releasing the collet 21; and a pneumatic clamp 25 is installed at the bottom of the mounting plate 24, the bottom of the pneumatic clamp 25 clamps the collet 21, and a sensor 22 is provided on the top of the pneumatic clamp 25.

[0041] For example, the collet 21 is a 5C collet 21, which has a long service life and a wide range of applicability. It has various series such as round hole and square hole, and the matching clamp can be replaced according to different sizes. During use, the pneumatic clamp 25 can quickly clamp and release the mandrel, with high concentricity and clamping force. Correspondingly, the sensor 22 is a force sensor 22, which can accurately determine the magnitude of the pulling force by detecting the friction between the collet 21 and the mandrel, and transmit the detected force signal to the control system in real time. The control system then adjusts the speed of the drive motor 42 synchronously according to the force value, thereby adjusting the pulling speed and forming a closed-loop control.

[0042] It should be explained in detail that in order to ensure that the product is not damaged during the extraction process and to improve the extraction efficiency, it is necessary to precisely control the extraction force and extraction speed. The extraction force is monitored in real time by the force sensor 22. In actual operation, an initial force value is first set according to different conduit products (this force value can be the pull-out force obtained during the product manufacturing process, or it can be obtained by directly testing the pull-out force of the conduit using a tensile testing machine). Then, the drive motor 42 is started to move the slide module 41. During the movement, when the actual force value is higher than the set force value, the drive motor 42 will automatically reduce the speed to prevent damage to the product; when the actual force value is lower than the set force value, the speed will automatically increase to improve production efficiency.

[0043] For example, when the actual force value is greater than the set value, the pulling speed is reduced to 1 mm / s; when the actual force value is less than the set value, the pulling speed is increased to 10-20 mm / s; and the increase or decrease of the pulling speed is adjusted gradually, with an adjustment speed of ±1 mm / s.

[0044] Understandably, the pneumatic clamp 25 drives the collet 21 to hold the end of the mandrel, and the force sensor 22 works with the drive motor 42 to achieve closed-loop control. The drive slide module 41 can drive the pneumatic clamp 25 to move precisely according to the preset process, pulling the mandrel out of the tube. During the pulling process, the change of friction force is detected in real time. Once the force value is found to exceed the preset range, the pulling speed will be adjusted immediately, which effectively avoids damage to the tube due to excessive pulling force and significantly improves the product yield.

[0045] Please continue reading. Figures 1-8 In this embodiment, the product clamping module 3 includes a clamping block 31. A driving cylinder 32 is provided on one side of the clamping block 31. The driving cylinder 32 serves as a power source and can provide sufficient driving force to the clamping block 31 to reliably fix the guide tube and ensure that the guide tube will not be displaced during the mandrel pulling process.

[0046] Correspondingly, a mounting base 35 is provided on the outer side of the mobile end clamping block 311, and a drive cylinder 32 is provided on the mounting base 35. A cylinder guide rod 36 is installed through the end of the mobile end clamping block 311. The guide rod is arranged parallel to the piston rod of the drive cylinder 32, which can effectively limit the movement direction of the mobile end clamping block 311, prevent the product clamping module 3 from turning or deviating during the clamping process, and ensure the stability of the clamping.

[0047] For example, the clamping block 31 includes a movable end clamping block 311 and a fixed end clamping block 312, which can be opened and closed with the fixed end clamping block 312 under the drive of the driving cylinder 32; the fixed end clamping block 312 and the movable end clamping block 311 are provided with flexible silicone pads 33, which can provide a certain friction force to prevent the conduit from sliding during the clamping process, and at the same time avoid hard contact between the clamping block 31 and the conduit, thus protecting the surface of the conduit; in addition, the clamping force can be precisely changed by adjusting the air pressure of the driving cylinder 32 to adapt to the clamping requirements of conduits of different materials and wall thicknesses; and a tightening handle 34 is provided on the outside of the fixed end, which can be rotated to adjust the position of the clamping block 31 on the slide rail 11, thereby adapting to conduits of different lengths.

[0048] Understandably, multiple sets of movable clamping blocks 31 work together. Driven by the driving cylinder 32, the moving end clamping block 311 moves closer to the fixed end clamping block 312, achieving tight clamping of the conduit. The inner flexible gasket 33 not only enhances the stability of the clamping but also deforms to a certain extent according to the shape of the conduit, ensuring a tight clamping. Furthermore, the clamping force and friction can be flexibly changed by adjusting the air pressure. This design allows the equipment to adapt to various types and sizes of conduits, greatly improving its applicability and production flexibility.

[0049] Please continue reading. Figures 1-8 In this embodiment, a control box 5 is provided on one side of the outer frame 1. The control box 5 contains core electrical components such as a central processing unit, relays, and drivers, and is the control center of the entire device. The control box 5 is electrically connected to the drive motor 42, sensor 22, and drive cylinder 32, and can centrally control and monitor the operating status of these components.

[0050] For example, the control box 5 is equipped with a touch screen 51, through which the operating parameters of the equipment, such as the pulling speed, clamping force, and pulling stroke, can be set intuitively. At the same time, the touch screen 51 can also display the operating status of the equipment, the actual values ​​of various parameters, and fault alarm information in real time, so that the operator can keep abreast of the equipment status. Correspondingly, a pressure gauge 52 and a pressure regulating valve 53 are set below the touch screen 51. The pressure gauge 52 can accurately display the current air pressure value of the drive cylinder 32 and the pneumatic clamp 25, providing a reference for the operator to adjust the air pressure. The pressure regulating valve 53 can precisely adjust the air pressure by rotating the knob, thereby changing the driving force of the drive cylinder 32 and the pneumatic clamp 25 to adapt to the clamping and pulling needs under different working conditions.

[0051] Working principle: The collet 21 is screwed and rotated to the bottom of the pneumatic clamp 25, and then the product mandrel (i.e., the exposed mandrel part of the medical catheter) is inserted. The clamping air pressure is adjusted by the pressure regulating valve 53 (the clamping force is increased for thicker products and decreased for thinner products). Then, the clamp button 26 is pressed to control the pneumatic clamp 25 to clamp and fix the mandrel. The position of the clamping block 31 is adjusted by tightening the handle 34, and then the clamping block 31 is driven by the drive cylinder 32 to clamp and fix the medical catheter. The drive motor 42 is started to drive the slide module 41 to move vertically upward along the slide rail 11, which in turn drives the collet 21 on the pneumatic clamp 25 to move synchronously, slowly pulling the mandrel out of the catheter.

[0052] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A medical catheter liner mandrel removal device, characterized by, include: The outer frame (1) is vertically provided with a slide rail (11), on which a spindle clamping module (2) and a product clamping module (3) are installed; The mandrel clamping module (2) includes a collet (21), and a sensor (22) is installed above the collet (21). The sensor (22) is used to detect and control the pulling force of the collet (21) on the mandrel. The product clamping module (3) includes a clamping block (31), and a driving cylinder (32) is provided on one side of the clamping block (31). The driving cylinder (32) is used to drive the clamping block (31) to fix the guide tube.

2. The medical catheter liner mandrel removal device of claim 1, wherein, The chute track (11) includes a first track (111) and a second track (112). A linear transmission module (4) is installed on the first track (111), and a product clamping module (3) is installed on the second track (112).

3. The medical catheter liner mandrel removal device of claim 2, wherein, The linear transmission module (4) includes a slide module (41), and a drive motor (42) is provided at the end of the slide module (41).

4. The medical catheter liner mandrel removal device of claim 3, wherein, The top of the slide module (41) is fixed with a connecting plate (23), and a mounting plate (24) is provided on the connecting plate (23).

5. The medical catheter liner mandrel removal device of claim 4, wherein, A pneumatic clamp (25) is installed at the bottom of the mounting plate (24), and a clamp button (26) is provided on the outside of the mounting plate (24).

6. The medical catheter liner mandrel removal device of claim 5, wherein, The pneumatic clamp (25) has a collet (21) clamped at the bottom and a sensor (22) provided at the top.

7. The medical catheter liner mandrel removal device of claim 1, wherein, The clamping block (31) includes a movable end clamping block (311) and a fixed end clamping block (312). The inner sides of the fixed end clamping block (312) and the movable end clamping block (311) are provided with flexible pads (33), and the outer side of the fixed end clamping block is provided with a tightening handle (34).

8. The medical catheter liner mandrel removal device of claim 7, wherein, A mounting base (35) is provided on the outside of the movable end clamp (311), and a drive cylinder (32) is provided on the mounting base (35). A cylinder guide rod (36) is installed through the end of the movable end clamp (311).

9. The medical catheter liner mandrel removal device of claim 1, wherein, A control box (5) is provided on one side of the outer frame (1), and the control box (5) is electrically connected to the drive motor (42), the sensor (22) and the drive cylinder (32).

10. The medical catheter liner mandrel removal device of claim 9, wherein, The control box (5) is equipped with a touch screen (51), and a pressure gauge (52) and a pressure regulating valve (53) are arranged below the touch screen (51).

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