Flexible solution pipe and dip-coating device suitable for super-long catheter

Abstract

The utility model discloses a flexible solution pipe and a dip-coating device suitable for a super-long catheter, the flexible solution pipe comprises a plastic flexible pipe and a flexible metal pipe which are mutually nested, and the flexible metal pipe is sleeved outside the plastic flexible pipe. The dip-coating device comprises the flexible solution pipe, a solution pipe mounting assembly for fixedly clamping the flexible solution pipe, and a lifting mechanism for realizing the lifting action of the flexible solution pipe. According to the flexible solution pipe, the plastic flexible pipe in the prior art is wrapped with the flexible metal pipe; due to the design of the flexible metal tube, the whole flexible solution tube is possible to lift, the flexible metal tube not only plays a role in protection, but also can prevent powder generated by friction due to direct use of a plastic flexible tube from damaging a catheter product and avoiding light, and prevents ultraviolet light from directly irradiating and curing a chemical solution, so that the service life of the catheter product is prolonged, and the service life of the catheter product is prolonged. And the metal pipe is matched with a transmission mechanism, so that the dip-coating of the super-long guide pipe is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a flexible solution tube for containing chemical solutions, and a dipping device suitable for an extra-long catheter. Background Art

[0002] A catheter or balloon catheter is a device used to navigate through the vascular system to the target clinical site for diagnostic or therapeutic procedures during minimally invasive interventional procedures. By changing the treatment method, the purpose of alleviating patient pain, shortening recovery time, and improving the quality of life of patients can be achieved. Therefore, intravascular catheters have become an indispensable element in modern medical practice. In order to reduce the friction of the catheter during the process of entering the human blood vessel, most of the existing catheters are treated with a coating solution (such as a hydrophilic coating solution), and the coating solution has a certain lubricity to reduce friction.

[0003] The principle of coating solution treatment is to use a thin and long solution tube filled with chemical solution to dip the chemical solution into the surface of the catheter or balloon catheter used in minimally invasive surgery, and then solidify the surface of the catheter or balloon so that the coating is tightly attached to the surface of the catheter or balloon.

[0004] At present, most of the solution tubes used in the market are made of hard materials, which cannot be bent or have a small bending degree. The solution tubes are relatively short and are generally fixed in a certain position. Instead, the catheter or balloon catheter is inserted downward into the solution tube. Due to the dual restrictions of equipment height and plant height, the coating length of the surface of the catheter or balloon catheter will not be very long, and the longest length is probably less than 350mm. At present, the market needs to coat products of 1600mm or more. The original hard material solution tube requires a very high net height of the plant, and the equipment needs to be very high. It is estimated that a net height space of more than 4 meters is required to produce such an extra-long catheter or balloon catheter. The general plant height is within 3 meters, which is far from meeting the installation requirements. Therefore, there is an urgent need for a technical equipment that can produce extra-long catheters without the need for a new plant.

[0005] In summary, as catheter design and application length continue to develop and improve, there must be technical equipment that can process such ultra-long catheters (catheters 1600mm and above) to meet the patient's needs for ultra-long catheters and balloon catheters for minimally invasive surgery. Utility Model Content

[0006] A brief overview of embodiments of the present invention is given below in order to provide a basic understanding of certain aspects of the present invention. It should be understood that the following overview is not an exhaustive overview of the present invention. It is not intended to identify key or important parts of the present invention, nor is it intended to limit the scope of the present invention. Its purpose is merely to present certain concepts in a simplified form as a prelude to a more detailed description discussed later.

[0007] The most commonly used hydrophilic coating machine on the market at present basically adopts the method of fixing the solution tube and allowing the catheter to be directly inserted into the solution tube from top to bottom. This method has the disadvantages of requiring very high equipment and plant height, and is difficult to operate. It cannot be installed in general plants. At the standard plant height, it is impossible to produce extra-long catheters. Some plastic solution tubes are not covered with metal hoses, which have the problems of friction and powder loss and light transmission, resulting in powder adhering to the catheter product and ultraviolet light curing the solution. In order to solve the above disadvantages, the utility model innovatively adopts a plastic flexible tube with a flexible metal tube, and the catheter is suspended and immovable, so that the solution tube can be inserted into the catheter from bottom to top. The metal flexible tube can be bent and deformed, and no powder is generated by friction. At the same time, it protects the solution from light and prevents it from being cured by ultraviolet light. It does not require very high equipment and installation plant height, and has the advantage of convenient operation.

[0008] According to one aspect of the present application, a flexible solution tube is provided, which includes a plastic flexible tube and a flexible metal tube nested with each other, the plastic flexible tube includes a body, the upper end of the body is provided with a tube head for convenient catheter immersion, and the bottom of the body is blocked by a plug; the flexible metal tube is sleeved outside the plastic flexible tube, the flexible metal tube includes a tube body and a metal tube head arranged at the upper end of the tube body and a plug arranged at the bottom of the tube body, the length of the flexible metal tube is greater than the length of the plastic flexible tube, and the tube head of the plastic flexible tube is extended out of the flexible metal tube; wherein, the plastic flexible tube is a hose for holding chemical solutions, its funnel-shaped tube head is conducive to the immersion of catheters or balloons, the tube body is slender and can reach more than 1600mm, and is suitable for dip coating of ultra-long catheters.

[0009] In one embodiment, the tube head of the plastic flexible tube is a funnel-shaped tube head.

[0010] In one embodiment, the flexible metal tube of the flexible solution tube has a bent state and a straight state, so that the plastic flexible tube inside it has a bent state and a straight state, and the deformation of the plastic flexible tube is achieved by the deformation of the flexible metal tube.

[0011] According to another aspect of the present application, a dipping device suitable for an extra-long catheter is provided, comprising the above-mentioned flexible solution tube, a solution tube mounting assembly for fixing and clamping the flexible solution tube, and a lifting mechanism for realizing the lifting and lowering action of the flexible solution tube, wherein the plastic flexible tube and the metal tube head of the flexible metal tube are fixed on the solution tube mounting assembly together, and the lifting mechanism is connected to the solution tube mounting assembly, and the lifting mechanism is used to drive the solution tube mounting assembly to rise or fall, thereby realizing the lifting and lowering of the flexible solution tube, when the flexible solution tube rises, the catheter or balloon is inserted into the flexible solution tube, so that the surface of the catheter or the balloon is coated with the chemical solution in the flexible solution tube, and when the flexible solution tube is lowered, the catheter or the balloon comes out of the flexible solution tube, thereby completing the process of coating the surface of the catheter or the balloon with the chemical solution.

[0012] In one embodiment, the lifting mechanism includes one or more motors and a transmission assembly (such as a gear set, a belt, a screw, etc.) connected to the motor. The transmission assembly drives the solution tube installation assembly to move up and down under the drive of the motor.

[0013] In one embodiment, the lifting mechanism includes a synchronous belt transmission assembly and an auxiliary roller clamping transmission mechanism.

[0014] The synchronous belt transmission assembly includes two groups of first transmission members and second transmission members vertically spaced apart, the first transmission member and the second transmission member each including a first synchronous pulley and a tensioning pulley seat arranged up and down, and a first synchronous toothed belt arranged on the first synchronous pulley and the tensioning pulley seat, the first synchronous toothed belt is connected to a linear guide rail via a synchronous pulley clamp, a guide rail slider is installed on the linear guide rail, and the guide rail slider is connected to the first synchronous toothed belt; a driving component is provided between the first synchronous pulleys of the two groups of transmission members, the driving component includes a second synchronous pulley, a second synchronous toothed belt, a first driving motor, a driving shaft and a belt seat bearing, one end of the driving shaft is connected to the first synchronous pulley, the second synchronous pulley, the second synchronous toothed belt and the first driving motor of the first transmission member, and the other end of the driving shaft is connected to the first synchronous pulley of the second transmission member via a belt seat bearing.

[0015] The auxiliary roller clamping transmission mechanism includes a mounting base plate and one or more mounting vertical plates vertically arranged on the mounting base plate. The mounting vertical plates are provided with guide blocks, guide tubes, motor synchronous belt drive components and clamping trapezoidal roller components. The guide blocks and guide tubes are coaxially arranged for limiting the position of the flexible solution tube. The clamping trapezoidal roller components include multiple trapezoidal rollers, compression springs, guide rods and baffles. The baffles are arranged on the side of the mounting vertical plates. The compression springs and guide rods are arranged between the trapezoidal rollers and the baffles. The trapezoidal rollers include active trapezoidal rollers and clamping trapezoidal rollers. The active trapezoidal rollers and the clamping trapezoidal rollers are used in pairs. A hexagonal hole groove is formed between the two. The flexible metal tube extends into the groove and is tangent to the four faces of the hexagonal hole groove. The flexible metal tube is driven to rise or fall by friction. The magnitude of the clamping force is adjusted by the compression amount of the compression spring. The motor synchronous belt drive assembly is used to drive the active trapezoidal roller to rotate, and the motor synchronous belt drive assembly includes a second drive motor, a third synchronous pulley, a third synchronous toothed belt, a synchronous belt tensioner and a motor mounting bracket. The second drive motor, the third synchronous pulley, the third synchronous toothed belt, the synchronous belt tensioner and the motor mounting bracket are arranged on the mounting vertical plate. The second drive motor drives the third synchronous pulley to rotate, and the trapezoidal roller installed on the same shaft as the third synchronous pulley rotates together. Under the connection of the third synchronous toothed belt, the other trapezoidal rollers also rotate synchronously. Under the clamping of several paired trapezoidal rollers, the flexible metal tube is driven to rise and fall. Through the above arrangement, the flexible solution tube slides inside the guide block and the guide tube, and can move in and out freely without jamming.

[0016] In order to adapt to the dip coating of the extra-long catheter, in one embodiment, the guide tube includes a guide bend, one end of which is fixed to the mounting vertical plate through a bent guide tube fixing seat, and the other end of which is fixed to the mounting bottom plate through a clamp. The bent guide tube fixing seat fixes the guide tube to the mounting plate, and there is a fixing seat at the front end, the middle position and the end to fix it. The inner wall of the guide tube is smooth, and the bending radius R ensures that the pipeline is unobstructed.

[0017] In one embodiment, when the flexible solution tube in the lifting mechanism is raised, the flexible metal tube is in a straight state, and the catheter or balloon is directly inserted into the flexible solution tube, and when the flexible solution tube in the lifting mechanism is lowered, the flexible metal tube is inserted into the guide curved tube and becomes a curved state again. The curved state can save height space, and the straight state can increase the height so that the catheter or balloon can be inserted therein.

[0018] In one embodiment, the solution tube installation assembly includes a solution tube cover plate, a lifting mechanism crossbeam plate, a cylinder, a metal hose fixing plate, a metal hose clamping flange, a plastic hose fixing plate and a connecting vertical plate. The left and right ends of the lifting mechanism crossbeam plate are respectively connected to the linear guide of the first transmission member and the guide rail slider on the linear guide of the second transmission member. The guide rail slider is connected to the first synchronous toothed belt, and the lifting action of the flexible solution tube is realized under the drive of the first drive motor; the flexible metal tube is fixed to the metal hose fixing plate by the metal hose clamping flange; the plastic flexible tube is inserted into the plastic hose fixing plate and arranged, and the hole on the plastic hose fixing plate is coaxially arranged with the hole on the metal hose fixing plate, so that the plastic flexible tube is inserted into the flexible metal tube; the solution tube cover plate is arranged to press the plastic flexible tube, and at the same time, the solution tube cover plate performs a translational action under the action of the cylinder.

[0019] In one embodiment, the dipping device further comprises a solution tank assembly, the solution tank assembly is located at the lower part, the solution pipe installation assembly is located at the upper part of the solution tank assembly, and the synchronous belt transmission assembly is connected to the solution pipe installation assembly.

[0020] In the prior art, for catheters or balloon catheters below 350mm, the automated coating machine generally uses a solution tube made of a plastic tube to achieve the dip coating of the catheter, and it is generally inserted into the solution tube by lifting the catheter or balloon to achieve automated coating. This solution cannot be applied to the dip coating of ultra-long catheters (catheters of 1600mm and above), and needs to be completed in conjunction with manual operation, which is complicated and has low production efficiency. For this reason, the present application designs a new type of flexible solution tube, which wraps a flexible metal tube outside the plastic flexible tube. The design of the flexible metal tube makes it possible to lift the entire flexible solution tube. The metal tube not only plays a protective role, but also prevents the direct use of the plastic flexible tube from generating powder due to friction, causing damage to the catheter product and light-shielding effect, preventing ultraviolet light from directly irradiating the chemical solution, and also plays a transmission role. The dip coating device for extra-long catheters of the present application no longer uses the traditional lifting and lowering of catheters or balloons to achieve coating, but instead achieves coating of catheters or balloons by lifting and lowering flexible solution tubes, thereby enabling dip coating of extra-long catheters. This not only eliminates the need for a complex centering structure, simplifies the structure of the entire coating machine, breaks the gap in the manufacture of dip coating equipment for extra-long catheters, but also greatly improves production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention can be better understood by referring to the following description in conjunction with the accompanying drawings, wherein the same or similar reference numerals are used in all drawings to represent the same or similar components. The accompanying drawings together with the following detailed description are included in and form a part of this specification, and are used to further illustrate the preferred embodiments of the present invention and explain the principles and advantages of the present invention. In the accompanying drawings:

[0022] Figure 1 This is a schematic structural diagram of a dipping device suitable for an ultra-long catheter according to an embodiment of the utility model;

[0023] Figure 2 A schematic diagram of an auxiliary roller clamping transmission mechanism of a dipping device according to an embodiment of the utility model;

[0024] Figure 3 It is a top view of the solution pipe installation assembly of the dipping device according to the embodiment of the utility model;

[0025] Figure 4 for Figure 3 Middle BB section view;

[0026] Figure 5 It is a side view of the solution pipe installation assembly of the dipping device according to the embodiment of the utility model;

[0027] Figure 6 This is a schematic diagram of a flexible solution tube according to an embodiment of the utility model:

[0028] In the figure: 001 plastic flexible tube, 002 flexible metal tube, 003 pressing trapezoidal roller, 004 active trapezoidal roller, 005 third synchronous toothed pulley, 006 third synchronous toothed belt, 007 second drive motor, 008 guide elbow, 009 mounting base, 010 solution tube mounting assembly, 011 linear guide, 012 first synchronous toothed belt, 013 guide slider, 014 seat bearing, 015 drive shaft, 016 first drive motor, 017 second synchronous pulley, 018 second synchronous toothed belt, 019 first synchronous pulley, 020 Synchronous belt pulley splint, 021 tensioning wheel seat, 022 solution tank, 023 solution pipe head, 024 solution pipe body, 025 solution pipe plug, 026 metal pipe head, 027 metal pipe body, 028 solution pipe cover, 029 lifting mechanism crossbeam plate, 030 cylinder, 031 metal hose fixing plate, 032 metal hose clamping flange, 033 plastic hose fixing plate, 034 connecting vertical plate, 035 compression spring, 036 guide rod, 037 guide block, 038 bent guide pipe fixing seat, 039 installation vertical plate, 040 synchronous belt tensioner. DETAILED DESCRIPTION

[0029] Embodiments of the present invention will be described below with reference to the accompanying drawings. Elements and features described in one drawing or one embodiment of the present invention may be combined with elements and features shown in one or more other drawings or embodiments. It should be noted that for the purpose of clarity, the representation and description of components and processes that are not related to the present invention and are known to those of ordinary skill in the art are omitted in the drawings and descriptions.

[0030] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, which are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. The terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a communication between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0031] Coating machines in the prior art generally use solution tubes made of plastic tubes to achieve dip coating of catheters. Because the plastic hose material is not wear-resistant, direct roller clamping transmission will cause surface powder loss due to the friction between plastic and metal. Once this powder adheres to the surface of the catheter or balloon, serious quality problems will occur, resulting in the catheter or balloon product failing to meet the requirements of medical interventional products. Therefore, the prior art generally achieves automatic coating by lifting and inserting the catheter or balloon into the solution tube. However, this solution is not suitable for dip coating of ultra-long catheters (catheters of 1600 mm and above).

[0032] In order to solve this problem, the idea of ​​the utility model is to put a metal hose (flexible metal tube) on the outer sleeve of the existing plastic hose (plastic flexible tube). The metal hose can be realized by the method of the existing technology, for example, it can be realized by a metal hose made of stainless steel thin iron sheet or steel wire spirally wound and with a corrugated surface. This metal hose itself is very soft and has a variety of shapes. It can change continuously with the structure of the guide tube, and can quickly return to a straight shape. At the same time, the metal hose with this corrugated surface is conducive to increasing the friction between the roller. The plastic hose is sleeved inside the metal hose, and there is a gap between the outer wall of the plastic hose and the inner wall of the metal hose, so there will be no friction, and no powder falling. The metal hose can also prevent ultraviolet light from directly irradiating the solution and solidifying the solution. This method of sleeved two tubes of different materials solves the transmission problem and avoids the problems of powder falling and light avoidance.

[0033] As a specific example, see Figure 6 The utility model provides a flexible solution tube, which includes a plastic flexible tube 001 and a flexible metal tube 002 which are nested with each other. The plastic flexible tube 001 includes a solution tube head 023, a solution tube body 024, and a solution tube plug 025. The solution tube body 024 is a slender body. The upper end of the body is provided with a solution tube head 023 for convenient catheter immersion. The solution tube head 023 is a funnel-shaped tube head, and the bottom of the body is blocked by the solution tube plug 025. The flexible metal tube 002 is sleeved outside the plastic flexible tube 001. The flexible metal tube includes a metal tube body 027, a metal tube head 026 arranged at the upper end of the tube body, and a plug arranged at the bottom of the tube body. The length of the flexible metal tube is greater than that of the plastic flexible tube, and the funnel-shaped tube head is extended out of the flexible metal tube. Among them, the plastic flexible tube is a hose for containing chemical solutions. Its funnel-shaped tube head is conducive to the immersion of a catheter or a balloon. The tube body is slender and can reach more than 1600mm, which is suitable for the dip coating of ultra-long catheters.

[0034] See also Figure 1-Figure 5 Another embodiment of the utility model provides a dip coating device suitable for an ultra-long catheter, comprising the above-mentioned flexible solution tube, a solution tube mounting assembly for fixing and clamping the flexible solution tube, a lifting mechanism for realizing the lifting and lowering action of the flexible solution tube, and a solution tank. The entire dip coating device is applied to the surface coating production equipment of the catheter / balloon catheter for minimally invasive surgery, and is a key and important component of such equipment.

[0035] The lifting mechanism includes a synchronous belt transmission assembly and an auxiliary roller clamping transmission mechanism. The synchronous belt transmission assembly includes two groups of first transmission members and second transmission members arranged vertically at intervals, the first transmission member and the second transmission member both include a first synchronous pulley and a tensioning wheel seat arranged up and down, and a first synchronous toothed belt arranged on the first synchronous pulley and the tensioning wheel seat, the first synchronous toothed belt is connected to a linear guide through a synchronous pulley clamp, a guide slider is installed on the linear guide, and the guide slider is connected to the first synchronous toothed belt; a driving component is provided between the first synchronous pulleys of the two groups of transmission members, the driving component includes a second synchronous pulley, a second synchronous toothed belt, a first driving motor, a driving shaft and a seat bearing, one end of the driving shaft is connected to the first synchronous pulley, the second synchronous pulley, the second synchronous toothed belt and the first driving motor of the first transmission member, and the other end of the driving shaft is connected to the first synchronous pulley of the second transmission member through the seat bearing.

[0036] The auxiliary roller clamping transmission mechanism includes a mounting base plate and one or two mounting vertical plates vertically arranged on the mounting base plate. The mounting vertical plates are provided with guide blocks, guide tubes, motor synchronous belt drive components and clamping trapezoidal roller components. The guide blocks and guide tubes are coaxially arranged for limiting the position of the flexible solution tube. The clamping trapezoidal roller component includes a plurality of trapezoidal rollers, compression springs, guide rods and baffles. The baffles are arranged on the side of the mounting vertical plates. The compression springs and guide rods are arranged between the trapezoidal rollers and the baffles. The trapezoidal rollers include active trapezoidal rollers and clamping trapezoidal rollers. The active trapezoidal rollers and the clamping trapezoidal rollers are used in pairs. A hexagonal hole groove is formed between the two. The flexible metal tube extends into the groove and is tangent to the four faces of the hexagonal hole groove. The flexible metal tube is driven to rise or fall by friction. The magnitude of the clamping force is adjusted by the compression amount of the compression spring. The motor synchronous belt drive assembly is used to drive the active trapezoidal roller of the pressing trapezoidal roller assembly to rotate. The motor synchronous belt drive assembly includes a second drive motor, a third synchronous pulley, a third synchronous toothed belt, a synchronous belt tensioner and a motor mounting bracket. The second drive motor, the third synchronous pulley, the third synchronous toothed belt, the synchronous belt tensioner and the motor mounting bracket are arranged on the mounting vertical plate. The second drive motor drives the third synchronous pulley to rotate, and the trapezoidal roller installed on the same shaft as the third synchronous pulley rotates together. Under the connection of the third synchronous toothed belt, the other trapezoidal rollers also rotate synchronously. Under the clamping of several paired trapezoidal rollers, the metal flexible tube is driven to rise and fall. Through the above arrangement, the flexible solution tube slides inside the guide block and the guide tube, and can move in and out freely without jamming.

[0037] The plastic flexible tube and the metal tube head of the flexible metal tube are fixed together on the solution tube installation assembly. The lifting mechanism is connected to the solution tube installation assembly. The lifting mechanism is used to drive the solution tube installation assembly to rise or fall, thereby realizing the lifting and lowering of the flexible solution tube. When the flexible solution tube rises, the catheter or balloon is inserted into the flexible solution tube, so that the surface of the catheter or the balloon is coated with the chemical solution in the flexible solution tube. When the flexible solution tube is lowered, the catheter or the balloon comes out of the flexible solution tube, thereby completing the process of coating the surface of the catheter or the balloon with the chemical solution.

[0038] The solution tank 022 is fixed on the bottom plate below the equipment, wherein the solution tube auxiliary drive motor adopts a synchronous toothed belt and a synchronous pulley (a gear set, or other V-shaped, flat belts, etc. can also be used) to drive the main roller, and the main roller and the elastic pre-load roller 003 clamp the flexible tube to rise or fall, and the flexible tube slides inside the guide tube. The guide tube can be L-shaped, U-shaped, or other shapes, and the number of flexible tubes is not limited to 2.

[0039] The heads of the plastic flexible tube and the flexible metal tube are fixed on the solution tube installation assembly 010. As the lifting assembly rises or falls, the power source is the synchronous belts on both sides, which drive the reduction motor through the synchronous pulley and the synchronous belt transmission to provide driving force. The driving method is not limited to the synchronous belt (or V-belt), and screw drive can also be used. The plastic flexible tube consists of a tube head, a tube body and a plug. It adopts a tight fit, and the plug is relatively easy to remove, which is convenient for cleaning and managing residues. The flexible metal tube consists of a tube head and a tube body, which are welded into one. The plastic flexible tube and the flexible metal tube are independent individuals, and there is no inlay or glued into an integrated structure between them.

[0040] The solution tube installation assembly 010 is mainly composed of a solution tube cover plate 028, a lifting mechanism crossbeam plate 029, a cylinder 030, a metal hose fixing plate 031, a metal hose clamping flange 032, a plastic hose fixing plate 033 and a connecting vertical plate 034. The left and right sides of the crossbeam plate are respectively connected to the guide rail sliders on the linear guide 011, and the guide rail sliders are connected to the synchronous belt to realize the solution tube lifting action driven by the driving motor.

[0041] Use the metal hose clamping flange 032 to fix the flexible metal tube 002 on the metal hose fixing plate 031; insert the plastic flexible tube 001 into the plastic hose fixing plate 033, and the hole on the plastic hose fixing plate 033 is coaxial with the hole on the metal hose fixing plate 031, so that the plastic flexible tube 001 enters the metal hose. The solution tube cover 028 presses the plastic flexible tube 001 to prevent it from detaching from the top. At the same time, under the action of the cylinder 030, it performs a translational action and covers the solution tube mouth to prevent light exposure and solidification of the chemical coating liquid. After removing the solution tube cover 028, pull out the plastic flexible tube 001 from the inside, then pull out the plug under the solution tube, and clean the solution tube.

[0042] In this embodiment, the plastic flexible tube and the flexible metal tube are the key core technical points. The two are independent entities, and there is no structural technology for inlaying or gluing them together. The plastic flexible tube is a tube for holding chemical solutions. The tube head is funnel-shaped, which is convenient for the immersion of catheters or balloons. The tube body is slender and can reach more than 1600mm. It is soft and easy to bend and deform and restore to a straight tube state. The lower end of the tube is blocked with a plug. The tube head, tube body and plug are pressed together. After the plug is pulled out, the inner wall of the tube body can be cleaned to prevent sediment accumulation. The flexible metal tube is composed of a tube head and a tube body, and the two are welded together to protect the plastic flexible tube and the transmission function.

[0043] The entire transmission mechanism is mainly composed of the lower solution tank assembly, the middle solution tube installation assembly and the top motor-driven synchronous belt transmission assembly, which are an important part of the hydrophilic coating machine. The top drive motor assembly is driven by the synchronous belt. When the solution tube is lifted, a catheter or a balloon is inserted into the solution tube, so that the surface of the catheter or the balloon is coated with a chemical solution. When the solution tube is lowered, the catheter or the balloon comes out of the solution tube, completing the process of coating the surface of the catheter or the balloon with a chemical solution.

[0044] Among them, the flexible solution tube is a plastic tube that can be bent arbitrarily. After bending, the shape is not fixed, it can be L-shaped, U-shaped or other shapes, and it can be transformed into a straight tube, that is, it can switch between the bent state and the straight state at will, and there is no fixed shape. The bent state can save height space, and the straight state can increase the height so that the catheter or balloon can be inserted into it. This deformation from the bent state to the straight state can meet the lifting height requirement. The present application arranges a flexible metal tube on the outer sleeve of the plastic flexible tube. The plastic flexible tube is composed of a tube head, a tube body and a plug, and is an independent individual; the flexible metal tube is composed of a tube head and a tube body, and is also an independent individual. There is no inlay, glue, etc. between the plastic flexible tube and the flexible metal tube. The plastic flexible tube and the upper end tube head of the outer sleeve flexible metal tube are fixed in the solution tube installation assembly. The driving reduction motor installed on the top uses a synchronous pulley and a synchronous belt to drive the lifting assembly to rise or fall. The lower end of the solution tube is clamped by several pairs of rollers to provide auxiliary power for the solution tube. The solution pipe is smoothly raised under the action of the upward pulling force of the upper motor and the upward thrust of the lower auxiliary roller. When the solution pipe needs to be lowered, the lower auxiliary roller provides downward pulling force, which works together with the downward thrust of the upper motor to allow the solution pipe to smoothly enter the guide pipe without causing the solution pipe to bend or the solution to overflow. The design has the advantages of small equipment height, no need to build a special super-high factory building, long processing catheter products, and convenient installation, transportation, production, and operation.

[0045] In the above description of specific embodiments of the present invention, the features described and / or shown for one embodiment may be used in the same or similar manner in one or more other embodiments, combined with features in other embodiments, or replace features in other embodiments.

[0046] Although the utility model has been disclosed above through the description of the specific embodiments of the utility model, it should be understood that all the above embodiments and examples are exemplary rather than restrictive. Those skilled in the art can design various modifications, improvements or equivalents of the utility model within the spirit and scope of the attached claims. These modifications, improvements or equivalents should also be considered to be included in the protection scope of the utility model.

Claims

1. Flexible solution tube, characterized in that: It comprises a plastic flexible tube and a flexible metal tube which are nested with each other. The plastic flexible tube comprises a body. The upper end of the body is provided with a tube head for convenient immersion of the catheter. The bottom of the body is blocked by a plug. The flexible metal tube is sleeved outside the plastic flexible tube. The flexible metal tube comprises a tube body, a metal tube tube head arranged at the upper end of the tube body and a plug arranged at the bottom of the tube body. The length of the flexible metal tube is greater than that of the plastic flexible tube, and the tube head of the plastic flexible tube is arranged to extend outside the flexible metal tube.

2. The flexible solution tube according to claim 1, characterized in that: The flexible metal tube of the flexible solution tube has a bent state and a straight state, so that the plastic flexible tube inside it has a bent state and a straight state, and the deformation of the plastic flexible tube is achieved through the deformation of the flexible metal tube.

3. The flexible solution tube according to claim 1, characterized in that: The tube head of the plastic flexible tube is a funnel-shaped tube head.

4. A dip coating device suitable for ultra-long catheters, characterized by: It comprises a flexible solution tube as described in any one of claims 1 to 3, a solution tube installation assembly for fixing and clamping the flexible solution tube, and a lifting mechanism for realizing the lifting and lowering action of the flexible solution tube, wherein the plastic flexible tube and the metal tube head of the flexible metal tube are fixed on the solution tube installation assembly, and the lifting mechanism is connected to the solution tube installation assembly, and the lifting mechanism is used to drive the solution tube installation assembly to rise or fall.

5. The dip coating device for ultra-long catheters according to claim 4, characterized in that: The lifting mechanism includes one or more motors and a transmission assembly connected to the motors. The transmission assembly drives the solution pipe installation assembly to move up and down under the drive of the motors.

6. The dip coating device for ultra-long catheters according to claim 4, characterized in that: The lifting mechanism includes a synchronous belt transmission assembly and an auxiliary roller clamping transmission mechanism; The synchronous belt transmission assembly comprises two groups of first transmission members and second transmission members arranged vertically at intervals, the first transmission member and the second transmission member each comprising a first synchronous pulley and a tensioning pulley seat arranged up and down, and a first synchronous toothed belt arranged on the first synchronous pulley and the tensioning pulley seat, the first synchronous toothed belt is connected to a linear guide rail via a synchronous pulley clamping plate, a guide rail slider is installed on the linear guide rail, and the guide rail slider is connected to the first synchronous toothed belt; a driving component is arranged between the first synchronous pulleys of the two groups of transmission members, the driving component comprises a second synchronous pulley, a second synchronous toothed belt, a first driving motor, a driving shaft and a belt seat bearing, one end of the driving shaft is connected to the first synchronous pulley, the second synchronous pulley, the second synchronous toothed belt and the first driving motor of the first transmission member, and the other end of the driving shaft is connected to the first synchronous pulley of the second transmission member via the belt seat bearing; The auxiliary roller clamping transmission mechanism includes a mounting base plate and one or more mounting vertical plates vertically arranged on the mounting base plate, and the mounting vertical plates are provided with guide blocks, guide tubes, motor synchronous belt drive components and clamping trapezoidal roller components, and the guide blocks and guide tubes are coaxially arranged for limiting the position of the flexible solution tube; the clamping trapezoidal roller component includes a plurality of trapezoidal rollers, compression springs, guide rods and baffles, the baffles are arranged on the sides of the mounting vertical plates, and the compression springs and guide rods are arranged between the trapezoidal rollers and the baffles; the trapezoidal rollers include active trapezoidal rollers and clamping trapezoidal rollers, and the active trapezoidal rollers and the clamping trapezoidal rollers are used in pairs, and a hexagonal hole groove is formed between the two, and the flexible metal tube extends into the groove and is tangent to the four faces of the hexagonal hole groove, relying on friction , driving the flexible metal tube to rise or fall, and the size of the pressing force is adjusted by the compression amount of the compression spring; the motor synchronous belt drive assembly is used to drive the active trapezoidal roller to rotate, and the motor synchronous belt drive assembly includes a second drive motor, a third synchronous pulley, a third synchronous toothed belt, a synchronous belt tensioner and a motor mounting bracket, the second drive motor, the third synchronous pulley, the third synchronous toothed belt, the synchronous belt tensioner and the motor mounting bracket are arranged on the mounting vertical plate, the second drive motor drives the third synchronous pulley to rotate, and the trapezoidal roller installed on the same shaft as the third synchronous pulley rotates therewith, under the connection of the third synchronous toothed belt, the other trapezoidal rollers also rotate synchronously, and the flexible metal tube is driven to rise and fall under the clamping of several paired trapezoidal rollers.

7. The dip coating device for ultra-long catheters according to claim 6, characterized in that: The guide pipe comprises a guide bend, one end of which is fixed on the mounting vertical plate through a bent guide pipe fixing seat, and the other end of which is fixed on the mounting bottom plate through a clamp.

8. The dip coating device for ultra-long catheters according to claim 6, characterized in that: The solution tube installation assembly includes a solution tube cover plate, a lifting mechanism crossbeam plate, a cylinder, a metal hose fixing plate, a metal hose clamping flange, a plastic hose fixing plate and a connecting vertical plate. The left and right ends of the lifting mechanism crossbeam plate are respectively connected to the linear guide of the first transmission member and the guide rail sliders on the linear guide of the second transmission member. The guide rail slider is connected to the first synchronous toothed belt, and the lifting action of the flexible solution tube is realized under the drive of the first drive motor; the flexible metal tube is fixed to the metal hose fixing plate by the metal hose clamping flange; the plastic flexible tube is inserted into the plastic hose fixing plate and arranged, and the hole on the plastic hose fixing plate is coaxially arranged with the hole on the metal hose fixing plate, so that the plastic flexible tube is inserted into the flexible metal tube; the solution tube cover plate is arranged to press the plastic flexible tube, and at the same time, the solution tube cover plate performs a translational action under the action of the cylinder.

9. The dip coating device for ultra-long catheters according to claim 6, characterized in that: The dipping device also includes a solution tank assembly, which is located at the lower part, a solution pipe installation assembly which is located at the upper part of the solution tank assembly, and a synchronous belt transmission assembly which is connected to the solution pipe installation assembly.

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