A chemical vapor deposition device for preparing functional coatings for intravascular implants

Abstract

The present invention relates to the technical field of chemical vapor deposition equipment, and specifically discloses a chemical vapor deposition equipment for preparing a functional coating of an intravascular implant, comprising an outer tube, an inner tube is arranged inside the outer tube, and the inner tube and the outer tube are arranged on the same central axis. As the mounting rod moves to the bottom of the inner tube and contacts the bottom plate, the mounting rod will generate an upward squeezing force on the diffusion disk through the support ring, so that the diffusion disk moves upward relative to the closing disk through the plug-in ring, so that the connecting pipe on the diffusion disk moves toward the temporary storage groove on the closing disk, and then pushes the closing plate to move up along the elastic telescopic rod, and finally the working groove on the connecting pipe is connected with the temporary storage groove, and the working groove is connected with the air inlet pipe through the through hole on the closing plate, so as to realize that when the inner tube is closed, the air inlet pipe is automatically connected with the inside of the inner tube, and the coating gas material is automatically input into the inner tube, which further improves the production automation and greatly improves the production efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of chemical vapor deposition equipment, in particular to a chemical vapor deposition equipment for preparing a functional coating of an intravascular implant. Background Art

[0002] In the field of medical device manufacturing, the preparation of functional coatings for intravascular implants is of vital importance. Chemical vapor deposition equipment is the key means to achieve this process. Its principle is to decompose and deposit gaseous coating materials on the surface of implants under high temperature and vacuum environment to form coatings with specific functions (such as anti-coagulation, anti-infection, and promotion of endothelialization, etc.), which significantly improves the biocompatibility and service life of implants, and is of great significance for the treatment of cardiovascular diseases.

[0003] However, traditional chemical vapor deposition equipment has many shortcomings. In terms of automation, the operating process is cumbersome. For example, equipment heating, gas input and other links often require manual step-by-step operation, which is not only inefficient, but also prone to errors due to human factors, affecting the stability of coating quality and production consistency. The gas delivery and equipment sealing mechanism is poor, and gas leakage problems often occur, which not only wastes materials and increases costs, but also may pollute the working environment and even affect the health of operators. During the operation of the equipment, carbon deposits are prone to form on the inner wall of the inner tube. There is a lack of an effective cleaning mechanism. The accumulation of carbon deposits will reduce the efficiency of heat transfer, affect the vapor deposition effect, and may contaminate the coating. In addition, the equipment preheating process takes a long time, and it is difficult to quickly reach the ideal operating temperature, which prolongs the production cycle and cannot meet the needs of efficient production. It is in urgent need of technological innovation and improvement. Summary of the invention

[0004] The present invention provides a chemical vapor deposition device for preparing a functional coating of an intravascular implant, which solves the problems mentioned in the above background technology.

[0005] To achieve the above objectives, the present invention is implemented by the following technical solutions: A chemical vapor deposition device for preparing a functional coating of an intravascular implant, comprising an outer tube, an inner tube is arranged inside the outer tube, wherein the inner tube and the outer tube are arranged on the same central axis, and further comprising: A processing assembly, wherein the processing assembly is movably mounted on the connecting ring, wherein the processing assembly moves up and down along the inner tube; An auxiliary assembly, wherein the auxiliary assembly is fixedly mounted on the processing assembly, and the auxiliary assembly works in coordination with the processing assembly; The processing assembly includes a bottom plate, the bottom surface of the inner tube is fixedly connected to the upper surface of the bottom plate, the bottom surface of the outer tube is fixedly connected to the upper edge surface of the bottom plate, the top outer surface of the inner tube is fixedly connected with a connecting ring, the outer end of the connecting ring is fixedly connected to the top inner surface of the outer tube, a conical groove is provided in the middle of the bottom plate, a placement plate is fixedly connected above the conical groove through a support rod, an output hole is provided at the bottom of the conical groove, wherein the output hole is initially in a closed state, and a vacuum state is set between the outer tube and the inner tube.

[0006] Preferably, a limiting rod is slidably connected through the upper surface of the connecting ring, and three limiting rods are arranged at fixed intervals around the central axis of the connecting ring. A No. 1 connecting ring is fixedly connected to the bottom of the limiting rod, and a No. 2 connecting ring is fixedly connected to the bottom inner surface of the outer tube, wherein the No. 1 connecting ring and the No. 2 connecting ring are arranged on the same central axis.

[0007] Preferably, a heating ring is fixedly embedded on the outer surface of the inner tube, wherein five heating rings are arranged at fixed intervals around the outer surface of the inner tube, the five heating rings are arranged parallel to each other, and the heating rings are controlled to start and stop by connecting ring No. 1 and connecting ring No. 2.

[0008] Preferably, the top of the connecting ring is fixedly connected to a top ring, the top ring and the outer tube are arranged on the same central axis, the inner upper surface of the top ring is fixedly connected to a connecting cover, the inner lower surface of the connecting cover is fixedly connected to a closing disk, and the middle upper surface of the closing disk is penetrated and fixedly connected to an air intake pipe.

[0009] Preferably, the auxiliary assembly includes a mounting frame, the upper surface of the mounting frame is fixedly connected to a motor, the output end of the motor is rotatably connected to a rotating wheel via a rotating shaft, the bottom of the rotating wheel is rotatably connected to the upper surface of the top ring, the outer surface of the rotating wheel is rotatably connected to a rotating tube, the top surface of the rotating tube is elastically and slidably plugged with a connecting rod, the top of the connecting rod is fixedly connected to a rotating ring, and the upper surface of the rotating ring is rotatably connected to the top inner surface of the connecting cover.

[0010] Preferably, a resistance bar is fixedly connected to the inner surface of the inner tube, and six of the resistance bars are arranged at fixed intervals around the central axis of the inner tube. A mounting rod is fixedly connected to the bottom of the rotating tube, and two mounting rods are arranged at fixed intervals around the central axis of the rotating tube. Support rings are fixedly connected to the inner sides of the two mounting rods, and an elastic tube is fixedly connected to the outer surface of the mounting rod, and the outer surface of the elastic tube is arranged to fit the inner surface of the inner tube.

[0011] Preferably, a positioning strip is fixedly connected to the inner surface of the elastic tube, a telescopic plate is fixedly connected to the inner surface of the positioning strip, and one end of the telescopic plate away from the positioning strip is fixedly connected to the inner surface of the elastic tube near the mounting rod.

[0012] Preferably, a temporary storage groove is provided inside the closing disk, the temporary storage groove is connected to the air intake pipe, an elastic telescopic rod is fixedly connected to the upper surface of the temporary storage groove, a closing plate is fixedly connected to the bottom of the elastic telescopic rod, a through hole is penetrated through the middle upper surface of the closing plate, a plug-in ring is elastically and slidably plugged into the bottom surface of the closing disk, and a diffusion disk is fixedly connected to the bottom of the plug-in ring.

[0013] Preferably, the interior of the diffusion disk is configured to be hollow, a diffusion hole is penetrated through the bottom surface of the diffusion disk, a connecting tube is penetrated and fixedly connected to the upper surface of the diffusion disk, a working groove is penetrated through the top side surface of the connecting tube, the top of the connecting tube is slidably inserted in the bottom wall of the closing plate, wherein the top of the connecting tube contacts the bottom surface of the closing plate, a pressure bag is fixedly connected to the upper edge surface of the diffusion disk, wherein the pressure bag is configured to be annular, and the top of the pressure bag is fixedly connected to the bottom surface of the closing disk, a rubber strip is fixedly inlaid on the bottom outer surface of the rotating tube, wherein the interior of the rubber strip is configured to be hollow, the internal cavity of the rubber strip is connected to the internal cavity of the pressure bag, and the pressure bag The internal cavity of the telescopic plate is connected with the internal cavity of the telescopic plate at the same time, and the top ring is moved upward until the inner tube is opened. At this time, the vascular implant is placed on the placement disk in the inner tube, and the top ring is driven downward to reset and snap-fit. During the resetting process of the top ring, the No. 1 connecting ring is driven downward by the limit rod, and finally the No. 1 connecting ring contacts the No. 2 connecting ring at the bottom, so that the heating ring on the outer surface of the inner tube is energized and heated. At this time, when the top ring is reset, the interior of the inner tube is in a closed state, and the interior of the inner tube is quickly evacuated to a vacuum state through the output hole at the bottom of the bottom plate, and then the gaseous coating material is injected into the inner tube through the air inlet pipe on the closing disk. Through the operation of the heating ring, the gaseous coating material gradually forms a coating on the surface of the implant to complete the processing.

[0014] The present invention provides a chemical vapor deposition device for preparing a functional coating of an intravascular implant. The device has the following beneficial effects: 1. The chemical vapor deposition equipment for preparing the functional coating of the intravascular implant can automatically heat the inner tube after closing by setting the No. 1 connecting ring and the No. 2 connecting ring, which greatly reduces the difficulty of operation. At the same time, the vacuum state between the outer tube and the inner tube can greatly improve the thermal insulation performance of the inner tube, which is convenient for increasing the temperature of the inner tube during production to achieve a certain preheating effect and speed up production efficiency. When the top ring descends, it drives the closing disk to move downward through the connecting cover, and simultaneously drives the rotating tube to move downward. When the rotating tube moves downward, it prompts the installation rod to move downward. As the installation rod moves to the bottom of the inner tube and connects with the bottom plate, When the closure plate is touched, the mounting rod will generate an upward squeezing force on the diffusion plate through the supporting ring, so that the diffusion plate moves upward relative to the closing plate through the plug-in ring, and the connecting pipe on the diffusion plate moves toward the temporary storage groove on the closing plate, thereby pushing the closing plate to move upward along the elastic telescopic rod, and finally the working groove on the connecting pipe is connected with the temporary storage groove, and the working groove is connected with the air inlet pipe through the through hole on the closing plate, so that when the inner tube is closed, the air inlet pipe is automatically connected with the inside of the inner tube, and the coating gas material is automatically input into the inner tube, which further improves the production automation and greatly improves the production efficiency.

[0015] 2. In the chemical vapor deposition equipment for preparing functional coatings of intravascular implants, when the top ring moves upward after production is completed, the closing plate will gradually return to its original position under the action of elasticity to reclose the air inlet pipe, thereby facilitating continuous production operation and greatly improving the practicality of the equipment. Since the bottom of the rotating tube is initially arranged below the diffusion disk, when the top ring moves downward, the rotating tube will first close the inner tube, thereby achieving the goal of closing the inner tube first during production so that the heating ring starts working for preheating, and at the same time, the interior of the inner tube is evacuated to a vacuum state through the output hole. As the top ring continues to move downward, the diffusion disk is squeezed through the support ring on the mounting rod to introduce the gas coating material into the inner tube, thereby achieving the goal of automatically waiting for the inner tube to be in a hollow and sealed state before introducing the gas coating material into the inner tube during production. The working stability of the device is improved in one step, and the problem of material leakage caused by the introduction of gas coating material before the inner tube is completely closed is avoided. When the top ring moves up, the air inlet pipe will also be closed in advance, which again prevents the material leakage problem caused by the process of removing the implant, greatly improving the applicability of the device. After the top ring is closed, the motor is started. When the motor is working, it will drive the rotating tube to rotate through the rotating wheel at its bottom, so that the mounting rod starts to rotate, and then the elastic tube starts to rotate along the inner wall of the inner tube, and intermittently contacts and squeezes the resistance strip on the inner surface of the inner tube. The elastic tube rubs the inner wall of the inner tube, which not only improves the heat accumulation and improves the vapor deposition effect, but also can continuously clean the carbon deposits on the inner surface of the inner tube, effectively preventing the formation of carbon deposits.

[0016] 3. In the chemical vapor deposition equipment for preparing the functional coating of the intravascular implant, during the process from contact to separation between the elastic tube and the resistance strip, the elastic tube will continuously impact the inner wall of the inner tube with a small amplitude, thereby achieving a vibration effect on the inner wall of the inner tube, thereby further improving the treatment effect of carbon deposits and preventing carbon deposits from adhering to the inner wall of the inner tube. At the same time, the elastic plate and the positioning strip can be used to support the elastic tube, greatly improving the durability of the elastic tube and preventing the elastic tube from deforming early and reducing the cleaning effect. In the process of the diffusion disk approaching the closing disk, the pressure bag will also be squeezed, so that the pressure bag will move its internal The air pressure is transmitted to the telescopic plate, thereby further improving the working effect of the elastic tube. At the same time, the pressure bag will also transmit its internal air pressure to the inside of the rubber strip, causing the rubber strip to expand outward, thereby automatically sealing the inner tube through the expanded rubber strip when the inner tube is closed, thereby ensuring the vacuum effect of the inner tube and improving the production quality of the implant. When the top ring moves upward, the expansion strip loses its expansion force and resets, that is, through the provision of a variable rubber strip, the rubber strip will expand outward for sealing only when working, and automatically reset at the rest of the time, which greatly reduces the friction between the rubber strip and the inner tube, thereby extending the service life of the rubber strip. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a front view of the present invention; Figure 2 It is a structural schematic diagram of the heating ring of the present invention; Figure 3 It is a structural schematic diagram of a placement tray of the present invention; Figure 4 It is a schematic diagram of the structure of the elastic tube of the present invention; Figure 5 It is a structural schematic diagram of the telescopic plate of the present invention; Figure 6 It is a structural schematic diagram of the closing plate of the present invention; Figure 7 It is a schematic diagram of the structure of the pressure bag of the present invention; Figure 8 It is a structural schematic diagram of the diffusion disk of the present invention.

[0018] In the figure: 1, outer tube; 2, inner tube; 3, processing assembly; 31, bottom plate; 32, connecting ring; 33, conical groove; 34, placement plate; 35, output hole; 36, limit rod; 37, No. 1 connecting ring; 38, No. 2 connecting ring; 39, heating ring; 310, top ring; 311, connecting cover; 312, closing plate; 313, intake pipe; 4, auxiliary assembly; 41, mounting frame; 42, motor; 43, rotating wheel; 44 , rotating tube; 45, plug-in rod; 46, rotating ring; 47, resistance strip; 48, mounting rod; 49, supporting ring; 410, elastic tube; 411, positioning strip; 412, telescopic plate; 413, temporary storage groove; 414, elastic telescopic rod; 415, closing plate; 416, plug-in ring; 417, diffusion disk; 418, diffusion hole; 419, connecting tube; 420, working groove; 421, pressure bag; 422, rubber strip. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] First embodiment: Figures 1 to 8 As shown, the present invention provides a technical solution: a chemical vapor deposition device for preparing a functional coating of an intravascular implant, comprising an outer tube 1, an inner tube 2 is arranged inside the outer tube 1, wherein the inner tube 2 and the outer tube 1 are arranged on the same central axis, and further comprising: The processing assembly 3 is movably installed on the connecting ring 32, wherein the processing assembly 3 moves up and down along the inner tube 2; Auxiliary assembly 4, the auxiliary assembly 4 is fixedly mounted on the processing assembly 3, and the auxiliary assembly 4 works in coordination with the processing assembly 3; The processing assembly 3 includes a bottom plate 31, the bottom surface of the inner tube 2 is fixedly connected to the upper surface of the bottom plate 31, the bottom surface of the outer tube 1 is fixedly connected to the upper edge surface of the bottom plate 31, the top outer surface of the inner tube 2 is fixedly connected with a connecting ring 32, the outer end of the connecting ring 32 is fixedly connected to the top inner surface of the outer tube 1, a conical groove 33 is provided in the middle of the bottom plate 31, a placement plate 34 is fixedly connected to the top of the conical groove 33 through a support rod, and an output hole 35 is provided at the bottom of the conical groove 33, wherein the output hole 35 is initially in a closed state, and a vacuum state is set between the outer tube 1 and the inner tube 2.

[0021] A limiting rod 36 is slidably connected to the upper surface of the connecting ring 32, and three limiting rods 36 are arranged at fixed intervals around the central axis of the connecting ring 32. A No. 1 connecting ring 37 is fixedly connected to the bottom of the limiting rod 36, and a No. 2 connecting ring 38 is fixedly connected to the bottom inner surface of the outer tube 1, wherein the No. 1 connecting ring 37 and the No. 2 connecting ring 38 are arranged on the same central axis.

[0022] A heating ring 39 is fixedly embedded on the outer surface of the inner tube 2, wherein five heating rings 39 are arranged at fixed intervals around the outer surface of the inner tube 2, the five heating rings 39 are arranged parallel to each other, and the heating rings 39 are controlled to start and stop by the No. 1 connecting ring 37 and the No. 2 connecting ring 38.

[0023] A top ring 310 is fixedly connected to the top of the connecting ring 32, and the top ring 310 and the outer tube 1 are arranged on the same central axis. A connecting cover 311 is fixedly connected to the inner upper surface of the top ring 310, and a closing disk 312 is fixedly connected to the inner lower surface of the connecting cover 311. An intake pipe 313 is fixedly connected to the middle upper surface of the closing disk 312.

[0024] Second embodiment: Figures 1 to 8 As shown, the auxiliary assembly 4 includes a mounting frame 41, the upper surface of which is fixedly connected to a motor 42, the output end of the motor 42 is rotatably connected to a rotating wheel 43 via a rotating shaft, the bottom of the rotating wheel 43 is rotatably connected to the upper surface of the top ring 310, the outer surface of the rotating wheel 43 is rotatably connected to a rotating tube 44, the top surface of the rotating tube 44 is elastically slidably plugged with a connecting rod 45, the top of the connecting rod 45 is fixedly connected to a rotating ring 46, and the upper surface of the rotating ring 46 is rotatably connected to the top inner surface of the connecting cover 311.

[0025] The inner surface of the inner tube 2 is fixedly connected with a resistance bar 47, and six resistance bars 47 are arranged at fixed intervals around the central axis of the inner tube 2. The bottom of the rotating tube 44 is fixedly connected with a mounting rod 48, wherein two mounting rods 48 are arranged at fixed intervals around the central axis of the rotating tube 44. Support rings 49 are fixedly connected to the inner sides of the two mounting rods 48, and the outer surface of the mounting rod 48 is fixedly connected with an elastic tube 410, and the outer surface of the elastic tube 410 is arranged to fit the inner surface of the inner tube 2.

[0026] A positioning strip 411 is fixedly connected to the inner surface of the elastic tube 410 , a telescopic plate 412 is fixedly connected to the inner surface of the positioning strip 411 , and one end of the telescopic plate 412 away from the positioning strip 411 is fixedly connected to the inner surface of the elastic tube 410 close to the mounting rod 48 .

[0027] A temporary storage groove 413 is provided inside the closing disk 312, and the temporary storage groove 413 is connected to the air inlet pipe 313. An elastic telescopic rod 414 is fixedly connected to the upper surface of the temporary storage groove 413, and a closing plate 415 is fixedly connected to the bottom of the elastic telescopic rod 414. A through hole is penetrated through the middle upper surface of the closing plate 415, and a plug-in ring 416 is elastically and slidably plugged into the bottom surface of the closing disk 312, and a diffusion disk 417 is fixedly connected to the bottom of the plug-in ring 416.

[0028] The interior of the diffusion disk 417 is set to be hollow, and a diffusion hole 418 is opened through the bottom surface of the diffusion disk 417. A connecting tube 419 is passed through and fixedly connected to the upper surface of the diffusion disk 417. A working groove 420 is opened through the top side surface of the connecting tube 419. The top of the connecting tube 419 is slidably inserted in the bottom wall of the closing plate 415, wherein the top of the connecting tube 419 contacts the bottom surface of the closing plate 415. A pressure bag 421 is fixedly connected to the upper surface of the edge of the diffusion disk 417, wherein the pressure bag 421 is set to be annular, and the top of the pressure bag 421 is fixedly connected to the bottom surface of the closing disk 312. A rubber strip 422 is fixedly inlaid on the bottom outer surface of the rotating tube 44, wherein the interior of the rubber strip 422 is set to be hollow, and the internal cavity of the rubber strip 422 is connected to the internal cavity of the pressure bag 421, and the internal cavity of the pressure bag 421 is also connected to the internal cavity of the telescopic plate 412.

[0029] During operation, the top ring 310 can be moved upward until the inner tube 2 is opened. At this time, the vascular implant is placed on the placement disk 34 in the inner tube 2, and the top ring 310 is driven downward to reset and snap. When the top ring 310 is reset, the No. 1 connecting ring 37 will be driven downward through the limit rod 36, and finally the No. 1 connecting ring 37 will contact the No. 2 connecting ring 38 at the bottom, so that the heating ring 39 on the outer surface of the inner tube 2 is electrically heated. At this time, when the top ring 310 is reset, the interior of the inner tube 2 is in a closed state, and the interior of the inner tube 2 is quickly evacuated to a vacuum state through the output hole 35 at the bottom of the bottom plate 31, and then the gaseous coating material is injected into the inner tube 2 through the air inlet pipe 313 on the closing disk 312. The gaseous coating material is gradually formed on the implant surface through the operation of the heating ring 39. The coating is formed to complete the processing. By setting the No. 1 connecting ring 37 and the No. 2 connecting ring 38, the inner tube 2 can be automatically heated after closing, which greatly reduces the difficulty of operation. At the same time, the outer tube 1 and the inner tube 2 are set to a vacuum state, which can greatly improve the thermal insulation performance of the inner tube 2, so that it is convenient to increase the temperature of the inner tube 2 during production to achieve a certain preheating effect and speed up production efficiency. When the top ring 310 descends, it will drive the closing disk 312 to move downward through the connecting cover 311, and simultaneously drive the rotating tube 44 to move downward. When the rotating tube 44 moves downward, it will prompt the installation rod 48 to move downward. As the installation rod 48 moves to the bottom of the inner tube 2 and contacts the bottom plate 31, the installation rod 48 will generate an upward squeezing force on the diffusion disk 417 through the support ring 49, that is, the diffusion disk 417 is passed. The plug-in ring 416 moves upward relative to the closing disk 312, that is, the connecting tube 419 on the diffusion disk 417 moves toward the temporary storage groove 413 on the closing disk 312, thereby pushing the closing plate 415 to move upward along the elastic telescopic rod 414, and finally the working groove 420 on the connecting tube 419 is connected with the temporary storage groove 413, and the working groove 420 is connected with the air inlet pipe 313 through the through hole on the closing plate 415, so that when the inner tube 2 is closed, the air inlet pipe 313 is automatically connected with the inside of the inner tube 2, and the coating gas material is automatically input into the inner tube 2, which further improves the production automation and greatly improves the production efficiency. When the production is completed, the top ring 310 moves upward, which will cause the closing plate 415 to gradually return to its original position under the action of elasticity, and the air inlet pipe 313 will be reclosed. The new closure makes it easier to realize continuous production operation, which greatly improves the practicality of the equipment. Since the bottom of the rotating tube 44 is initially set below the diffusion disk 417, when the top ring 310 moves down, the rotating tube 44 will first close the inner tube 2, so that the inner tube 2 is closed first during production so that the heating ring 39 starts to work for preheating, and at the same time, the interior of the inner tube 2 is evacuated to a vacuum state through the output hole 35. As the top ring 310 continues to move downward, the diffusion disk 417 is squeezed through the support ring 49 on the mounting rod 48 to introduce the gas coating material into the inner tube 2, so that the gas coating material is automatically introduced into the inner tube 2 after the inner tube 2 is in a hollow and sealed state during production, which further improves the working stability of the equipment.At the same time, it also avoids the problem of material leakage caused by the introduction of gas coating material before the inner tube 2 is completely closed. When the top ring 310 moves up, the air inlet pipe 313 will also be closed one step in advance, which again prevents the material leakage problem caused by the process of removing the implant, greatly improving the applicability of the device. After the top ring 310 is closed, the motor 42 is started. When the motor 42 is working, it will drive the rotating tube 44 to rotate through the rotating wheel 43 at the bottom, that is, the installation rod 48 starts to rotate, and then the elastic tube 410 starts to rotate along the inner wall of the inner tube 2, and intermittently contacts with the inner tube 2. The resistance strip 47 on the inner surface contacts and squeezes, and the elastic tube 410 rubs against the inner wall of the inner tube 2, which not only improves the heat accumulation and improves the vapor deposition effect, but also can continuously clean the carbon deposits on the inner surface of the inner tube 2, effectively preventing the formation of carbon deposits. At the same time, after the processing is completed, the carbon deposits are temporarily stored in the conical groove 33 and finally discharged outward through the output hole 35. In the process from contact to separation between the elastic tube 410 and the resistance strip 47, the elastic tube 410 will continuously impact the inner wall of the inner tube 2 with a small amplitude, thereby achieving a vibration effect on the inner wall of the inner tube 2, thereby further The processing effect of carbon deposits is further improved, and carbon deposits are prevented from adhering to the inner wall of the inner tube 2. At the same time, the elastic plate 412 and the positioning strip 411 can realize the support effect of the elastic tube 410, greatly improving the durability of the elastic tube 410, and preventing the elastic tube 410 from deforming early and reducing the cleaning effect. When the diffusion plate 417 approaches the closing plate 312, the pressure bag 421 is squeezed, so that the pressure bag 421 transmits its internal air pressure to the expansion plate 412, thereby further improving the working effect of the elastic tube 410. At the same time, the pressure bag 421 also transmits its internal air pressure to the expansion plate 412. The rubber strip 422 is transported to the inside of the rubber strip 422, so that the rubber strip 422 expands outward, and then the inner tube 2 is automatically sealed by the expanded rubber strip 422 when the inner tube 2 is closed, thereby ensuring the vacuum effect of the inner tube 2 and improving the production quality of the implant. When the top ring 310 moves upward, the expansion strip loses its expansion force and resets, that is, the variable rubber strip 422 is set so that the rubber strip 422 will only expand outward to seal when working, and automatically reset at other times, which greatly reduces the friction between the rubber strip 422 and the inner tube 2, thereby extending the service life of the rubber strip 422.

[0030] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions. The sentence "includes an element defined by... does not exclude the existence of other identical elements in the process, method, article or device including the element".

Claims

1. A chemical vapor deposition apparatus for preparing a functional coating for an intravascular implant, comprising an outer tube (1), characterized in that: An inner tube (2) is arranged inside the outer tube (1), wherein the inner tube (2) and the outer tube (1) are arranged on the same central axis, and further comprising: A processing assembly (3), wherein the processing assembly (3) is movably mounted on the connecting ring (32), wherein the processing assembly (3) moves up and down along the inner tube (2); An auxiliary assembly (4), wherein the auxiliary assembly (4) is fixedly mounted on the processing assembly (3), and the auxiliary assembly (4) works in coordination with the processing assembly (3); The processing assembly (3) comprises a bottom plate (31), the bottom surface of the inner tube (2) is fixedly connected to the upper surface of the bottom plate (31), the bottom surface of the outer tube (1) is fixedly connected to the upper surface of the edge of the bottom plate (31), the top outer surface of the inner tube (2) is fixedly connected to a connecting ring (32), the outer end of the connecting ring (32) is fixedly connected to the top inner surface of the outer tube (1), a conical groove (33) is provided in the middle of the bottom plate (31), a placement plate (34) is fixedly connected to the top of the conical groove (33) via a support rod, and an output hole (35) is provided at the bottom of the conical groove (33), wherein the output hole (35) is initially in a closed state, and a vacuum state is set between the outer tube (1) and the inner tube (2).

2. The chemical vapor deposition device for preparing a functional coating for an intravascular implant according to claim 1, characterized in that: The upper surface of the connecting ring (32) is penetrated by a limit rod (36) that is slidably connected. Three limit rods (36) are arranged at fixed intervals around the central axis of the connecting ring (32). A No. 1 connecting ring (37) is fixedly connected to the bottom of the limit rod (36). A No. 2 connecting ring (38) is fixedly connected to the inner surface of the bottom of the outer tube (1), wherein the No. 1 connecting ring (37) and the No. 2 connecting ring (38) are arranged on the same central axis.

3. The chemical vapor deposition device for preparing a functional coating for an intravascular implant according to claim 2, characterized in that: A heating ring (39) is fixedly embedded on the outer surface of the inner tube (2), wherein five heating rings (39) are arranged at fixed intervals around the outer surface of the inner tube (2), the five heating rings (39) are arranged parallel to each other, and the heating rings (39) are controlled to start and stop via a No. 1 connecting ring (37) and a No. 2 connecting ring (38).

4. The chemical vapor deposition device for preparing a functional coating for an intravascular implant according to claim 3, characterized in that: A top ring (310) is fixedly connected to the top of the connecting ring (32); the top ring (310) and the outer tube (1) are arranged on the same central axis; a connecting cover (311) is fixedly connected to the inner upper surface of the top ring (310); a closing disk (312) is fixedly connected to the inner lower surface of the connecting cover (311); and an air intake pipe (313) is penetrated and fixedly connected to the middle upper surface of the closing disk (312).

5. The chemical vapor deposition device for preparing a functional coating of an intravascular implant according to claim 4, characterized in that: The auxiliary assembly (4) comprises a mounting frame (41), the upper surface of the mounting frame (41) is fixedly connected to a motor (42), the output end of the motor (42) is rotatably connected to a rotating wheel (43) via a rotating shaft, the bottom of the rotating wheel (43) is rotatably connected to the upper surface of the top ring (310), the outer surface of the rotating wheel (43) is rotatably connected to a rotating tube (44), the top surface of the rotating tube (44) is elastically slidably plugged with a plug rod (45), the top of the plug rod (45) is fixedly connected to a rotating ring (46), and the upper surface of the rotating ring (46) is rotatably connected to the top inner surface of the connecting cover (311).

6. The chemical vapor deposition device for preparing a functional coating of an intravascular implant according to claim 5, characterized in that: The inner surface of the inner tube (2) is fixedly connected to a resistance bar (47), and six resistance bars (47) are arranged at fixed intervals around the central axis of the inner tube (2). The bottom of the rotating tube (44) is fixedly connected to a mounting rod (48), and two mounting rods (48) are arranged at fixed intervals around the central axis of the rotating tube (44). The inner sides of the two mounting rods (48) are fixedly connected to a support ring (49). The outer surface of the mounting rod (48) is fixedly connected to an elastic tube (410), and the outer surface of the elastic tube (410) is arranged to fit the inner surface of the inner tube (2).

7. The chemical vapor deposition device for preparing a functional coating of an intravascular implant according to claim 6, characterized in that: The inner surface of the elastic tube (410) is fixedly connected to a positioning strip (411), the inner side surface of the positioning strip (411) is fixedly connected to a telescopic plate (412), and one end of the telescopic plate (412) away from the positioning strip (411) is fixedly connected to the inner surface of the elastic tube (410) on a side close to the mounting rod (48).

8. The chemical vapor deposition device for preparing a functional coating of an intravascular implant according to claim 7, characterized in that: A temporary storage groove (413) is provided inside the closing disk (312), the temporary storage groove (413) is communicated with the air intake pipe (313), an elastic telescopic rod (414) is fixedly connected to the upper surface of the temporary storage groove (413), a closing plate (415) is fixedly connected to the bottom of the elastic telescopic rod (414), a through hole is penetrated through the middle upper surface of the closing plate (415), a plug-in ring (416) is elastically slidably plugged into the bottom surface of the closing disk (312), and a diffusion disk (417) is fixedly connected to the bottom of the plug-in ring (416).

9. The chemical vapor deposition device for preparing a functional coating of an intravascular implant according to claim 8, characterized in that: The interior of the diffusion disk (417) is arranged to be hollow, a diffusion hole (418) is formed through the bottom surface of the diffusion disk (417), a connecting pipe (419) is formed through the top surface of the diffusion disk (417) and is fixedly connected thereto, a working groove (420) is formed through the top side surface of the connecting pipe (419), and the top of the connecting pipe (419) is slidably inserted into the bottom wall of the closing plate (415), wherein the top of the connecting pipe (419) contacts the bottom surface of the closing plate (415), and the side surface of the diffusion disk (417) is provided with a plurality of connecting pipes (420) extending therethrough. A pressure bag (421) is fixedly connected to the upper surface of the edge, wherein the pressure bag (421) is arranged in a ring shape, and the top of the pressure bag (421) is fixedly connected to the bottom surface of the closing disk (312), and a rubber strip (422) is fixedly embedded on the outer surface of the bottom of the rotating tube (44), wherein the interior of the rubber strip (422) is arranged in a hollow shape, and the internal cavity of the rubber strip (422) is connected to the internal cavity of the pressure bag (421), and the internal cavity of the pressure bag (421) is also connected to the internal cavity of the telescopic plate (412).

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