Medical catheter surface and inner cavity coating device and method

Abstract

The invention relates to the technical field of medical catheters, and provides a medical catheter surface and inner cavity coating device which comprises an equipment assembly, a moving mechanism, an outer coating mechanism and an inner coating mechanism, the equipment assembly is provided with a first coating area and a second coating area, the outer coating mechanism is used for coating the outer wall of a catheter in the first coating area, and the inner coating mechanism is used for coating the inner wall of the catheter in the second coating area. The inner coating mechanism is used for coating the inner wall of the guide pipe in the second coating area, and the moving mechanism is used for driving the guide pipe to enter the first / second coating area. According to the medical catheter surface and inner cavity coating device, the inner wall and the outer wall of a medical catheter can be coated, and the coating quality is improved. The invention further provides a coating method of the medical catheter surface and inner cavity coating device.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical catheter, in particular to a medical catheter surface and lumen coating device and coating method. BACKGROUND

[0002] Medical catheter technology plays a vital role in the modern medical field. By imparting different functionalities such as antibacterial, hydrophobic, hydrophilic, etc. on the surface and lumen of medical catheter, it can better meet the actual needs of patient treatment, improve the treatment effect and patient comfort, and play an irreplaceable role in the medical industry.

[0003] In order to realize the different coating requirements of the inner and outer surfaces of the catheter, different coating methods are usually adopted. For the outer wall of the medical catheter, immersion method is generally used for coating, which can make the outer wall of the catheter fully contact with the coating material and achieve good coating effect. For the inner surface of the medical catheter, vacuum negative pressure perfusion coating method is used, which uses vacuum negative pressure to suck the coating material into the catheter to realize the coating of the inner surface.

[0004] Due to the different coating methods of the outer wall and the inner wall, and the need to keep the outer wall of the medical catheter unobstructed when coating the outer wall of the medical catheter, and the need to ensure that the inner wall of the medical catheter is unobstructed when coating the inner wall of the medical catheter, the difficulty and complexity of the coating operation are significantly increased. Therefore, a device for conveniently coating the inner and outer surfaces of the medical catheter is needed. SUMMARY

[0005] In order to facilitate the coating of the lumen of the medical catheter, the present application provides a medical catheter surface and lumen coating device and coating method.

[0006] In the first aspect, the medical catheter surface and lumen coating device provided by the present application adopts the following technical scheme: A medical catheter surface and lumen coating device, comprising a device assembly, a moving mechanism, an outer coating mechanism and an inner coating mechanism, the device assembly has a first coating area and a second coating area, the outer coating mechanism is used for coating the outer wall of the catheter in the first coating area, the inner coating mechanism is used for coating the inner wall of the catheter in the second coating area, and the moving mechanism is used for driving the catheter into the first / second coating area; The moving mechanism is provided with a clamping assembly for connecting with both ends of the catheter, the clamping assembly comprises a clamping plate, and a positioning rod and a positioning sleeve slidably installed on the clamping plate, the positioning sleeve is used for sleeving the outer wall of the catheter, and the positioning rod is used for inserting the inner wall of the catheter; The positioning sleeve is sleeved on the outer wall of the catheter in the first state, and the positioning rod is inserted into the inner wall of the catheter in the second state; the clamping plate is provided with a switching assembly, and the switching assembly is used for switching the first state and the second state of the catheter.

[0007] By adopting the technical scheme, when the coating layer is coated on the catheter, the two ends of the catheter are respectively inserted into the positioning rods of the two clamping plates, at this time, the outer surface of the catheter is exposed to the outside, the moving mechanism can transfer the catheter to the first coating area, and the outer coating mechanism can coat the outer wall of the catheter, so that the coating dead angle can be avoided.

[0008] At this time, the moving mechanism transfers the catheter from the first coating area to the second coating area, and switches the catheter from the second catheter to the first state by using the switching assembly, that is, the insertion rod is separated from the inner wall of the catheter, and the positioning sleeve is sleeved on the end of the catheter, so that the catheter can still be fixed between the two clamping plates; at this time, the inner coating mechanism can coat the inner wall of the catheter, so that the inner coating of the catheter is completed.

[0009] When the device respectively coats the inner and outer surfaces of the medical catheter, the inner and outer surfaces of the medical catheter are not shielded, the coating dead angle of the catheter is avoided, and the coating quality of the medical catheter is improved.

[0010] Optionally, the switching assembly comprises a driving part, a sliding block, a first moving rod and a second moving rod, the clamping plate is provided with a driving groove for sliding of the sliding block, and the driving part is used to drive the sliding block to reciprocate in the driving groove. The first moving rod is fixed to the outer wall of the positioning sleeve and located in the driving groove; the second moving rod is fixed to the outer wall of the positioning rod, the clamping plate is provided with a communication groove, the positioning sleeve is provided with a movable groove for connecting the communication groove and the driving groove, and the end of the second moving rod is sequentially arranged in the communication groove, the driving groove and the driving groove; the sliding block is provided with a switching part, and the switching part is used to drive the sliding block to be connected with the first / second moving rod.

[0011] By adopting the above technical scheme, when the positioning sleeve is sleeved on the outer wall of the catheter and the positioning rod is separated from the inner wall of the positioning sleeve, the sliding block is first fixed with the first moving rod by using the switching part, and the sliding block is driven to slide in the driving groove by the driving part, so that the positioning sleeve is sleeved on the outer wall of the catheter.

[0012] Then, the sliding block is separated from the first moving rod by using the switching part, and the sliding block is fixed with the second moving rod, so that the positioning rod is separated from the inner wall of the catheter, so that the inner coating mechanism can coat the inner wall of the catheter.

[0013] After the medical catheter is removed from the two clamping assemblies after completing the inner and outer coating, the sliding block is connected with the second moving rod to drive the positioning rod to be exposed to the clamping plate; then, the sliding block is connected with the first moving rod to drive the positioning sleeve into the clamping plate, so that the device can coat a new medical catheter.

[0014] Optionally, the switching component comprises two controllable electromagnetic parts and two permanent magnets, the two controllable electromagnetic parts are arranged on the sliding block, and the two permanent magnets are arranged at the ends of the first moving rod and the second moving rod respectively; the controllable electromagnetic parts are used for cooperating with the permanent magnets. When one group of controllable electromagnetic parts is controlled to generate a magnetic field attracting the permanent magnet at the end of the first moving rod, the other group of controllable electromagnetic parts is controlled to disappear, so as to realize the connection of the sliding block and the first moving rod and the disconnection of the connection with the second moving rod; vice versa.

[0015] By adopting the above technical scheme, when one group of controllable electromagnetic parts is controlled to generate a magnetic field attracting the permanent magnet at the end of the first moving rod, the other group of controllable electromagnetic parts is cancelled to disappear, so as to realize the connection of the sliding block and the first moving rod and the disconnection of the connection with the second moving rod, so as to drive the positioning sleeve to move; on the contrary, the positioning rod can be driven to move on the clamping plate.

[0016] Optionally, a supporting part is movably arranged on the outer wall of the positioning sleeve, the supporting part is used for abutting against the side of the second moving rod away from the adjacent clamping plate; a first spring is arranged between the supporting part and the positioning sleeve, the elastic force of the first spring is used for driving the supporting part to move towards the side of the positioning sleeve; a guide part is arranged on the inner wall of the driving groove and used for driving the supporting part to move towards the side away from the positioning sleeve.

[0017] By adopting the above technical scheme, by arranging the supporting part, the position of the positioning rod can be fixed, and the movement of the positioning rod towards the side of the clamping plate during the sleeving of the medical sleeve on the positioning rod is avoided, so as to facilitate the convenience of sleeving the medical sleeve on the outer wall of the positioning rod.

[0018] When the sliding block is connected with the first moving rod and drives the positioning sleeve to be sleeved on the outer wall of the medical catheter, the guide part can drive the supporting part to move towards the side away from the positioning sleeve, so that the supporting part is cancelled to abut against the second moving rod, so that the supporting part smoothly passes through the second moving rod, so that the positioning sleeve can be smoothly sleeved on the outer wall of the medical sleeve.

[0019] Optionally, the guide part comprises a guide block, a first guide surface and a second guide surface, the guide block is fixed on the inner wall of the driving groove, and the first guide surface and the second guide surface are arranged on the opposite sides of the supporting part along the moving direction of the positioning sleeve; the first guide surface and the second guide surface are used for cooperating with the guide block and guiding the supporting part to move towards the side away from the positioning sleeve.

[0020] By adopting the technical scheme, when the first moving rod is connected with the sliding block and drives the positioning sleeve to slide on the clamping plate, the guide block abuts against the first guide surface / second guide surface of the supporting part, so that the supporting part is driven to move towards the side away from the positioning sleeve, and the supporting part smoothly passes through the second moving rod.

[0021] Optionally, the outer wall of the positioning rod is wrapped with a rubber layer.

[0022] By adopting the technical scheme, the rubber layer is arranged, the stability of the insertion of the catheter end into the positioning rod is improved, and the separation of the catheter from the two clamping plates is avoided; and when the positioning rod is separated from the insertion of the catheter, the catheter is subjected to the force towards the side of the clamping plate due to the friction between the catheter and the positioning rod, so that the catheter end abuts against the side of the clamping plate, and the entry of the coating liquid into the catheter and the clamping plate is reduced.

[0023] Optionally, the positioning sleeve is internally provided with an air bag member, the air bag member abuts against the outer wall of the catheter, and the clamping plate is provided with an inflation assembly for inflating / deflating the air bag member.

[0024] By adopting the technical scheme, after the positioning sleeve is arranged on the outer wall of the medical catheter, the air bag member is inflated by the inflation assembly, so that the air bag member abuts against the outer wall of the medical catheter, and the separation of the medical catheter from the positioning sleeve is further reduced.

[0025] Optionally, the internal coating mechanism comprises a material injection pipe, an exhaust pipe and a drying pipe, one of the clamping plates is provided with a communication pipe for communicating with the inside of the catheter, the material injection pipe, the exhaust pipe and the drying pipe are in communication with the communication pipe, one end of the material injection pipe away from the communication pipe is provided with a feeding device, one end of the exhaust pipe away from the communication pipe is provided with an air extraction device, and one end of the drying pipe away from the communication pipe is provided with a drying device; the other clamping plate is provided with a liquid discharge pipe for communicating with the inside of the catheter, and the liquid discharge pipe is provided with a valve.

[0026] By adopting the technical scheme, after the moving mechanism drives the clamping assembly to enter the internal coating area, the valve of the liquid discharge pipe is opened, then the coating liquid is injected into the medical catheter through the material injection pipe, at this time, the air in the medical catheter can be discharged to the outside through the liquid discharge pipe, and after the coating liquid fills the entire medical catheter, the liquid discharge pipe is closed, so as to coat the coating layer on the inner wall of the catheter.

[0027] Then, the exhaust pipe and the liquid discharge pipe are opened, and the excess coating liquid on the inner wall of the medical catheter is discharged from the liquid discharge pipe; then hot air is introduced into the medical catheter through the drying pipe, so that the coating on the inner wall of the medical catheter is completed.

[0028] In a second aspect, the application provides a coating method of a medical catheter surface and lumen coating device, which specifically comprises the following steps: S1, coating preparation, adding coating liquid into the inner coating mechanism and the outer coating mechanism, and moving the two sets of clamping assemblies to the first coating area; S2, installing the medical catheter, extending the end of the positioning rod of the two clamping plates outside the environment by using the switching assembly, and then inserting the two ends of the medical catheter into the two positioning rods respectively; S3, performing outer coating work, coating the outer wall of the medical catheter by using the outer coating mechanism to form a coating layer; S4, moving the catheter, transferring the medical catheter from the first coating area to the second coating area by using the moving mechanism, and extending the end of the positioning sleeve outside the clamping plate and retracting the end of the positioning rod into the clamping plate by using the switching assembly; S5, performing inner coating work, coating the inner wall of the medical catheter by using the inner coating mechanism to form a coating layer, and completing the inner and outer coating work of the medical catheter; finally, taking the catheter out of the two clamping plates.

[0029] By adopting the above technical scheme, when the inner and outer surfaces of the medical catheter are coated respectively, the inner and outer surfaces of the medical catheter are not shielded, avoiding the generation of coating dead angles of the catheter, and thus improving the coating quality of the medical catheter.

[0030] In summary, the application has at least one of the following beneficial technical effects: 1. The switching assembly can switch the connection position of the medical catheter and the clamping plate, avoiding the generation of coating dead angles of the medical catheter during the inner and outer coating of the medical catheter, facilitating the coating work of the inner and outer surfaces of the medical catheter, and improving the coating quality of the medical catheter; 2. The support part can fix the position of the positioning rod, avoiding the cleaning of the positioning rod moving towards the side of the clamping plate during the sleeving of the medical sleeve on the positioning rod, and facilitating the convenience of sleeving the medical sleeve on the outer wall of the positioning rod; 3. The rubber layer can increase the stability of the insertion of the catheter end and the positioning rod, and when the positioning rod is separated from the insertion of the catheter, the catheter end can be tightly abutted to the side of the clamping plate, reducing the entry of the coating liquid between the catheter and the clamping plate. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 is a structural schematic diagram of Example 1; Figure 2 is a partial sectional view of the clamping assembly of Example 1; Figure 3 is a partial enlarged view of A of Figure 2 ; and Figure 4 is Figure 2 a partial enlarged view at B of Figure 5 is Figure 2 a partial enlarged view at C of Figure 6 is a partial sectional view of the clamping plate of Example 1; Figure 7 is a partial sectional view of the clamping plate of Example 2; Figure 8 is a structural schematic view of the clamping plate of Example 2.

[0032] Explanation of reference numerals: 1, device assembly; 11, outer soaking tank; 12, drying tank; 13, liquid receiving tank; 2, moving mechanism; 21, linear module; 22, air cylinder; 23, mounting rod; 24, mounting plate; 25, first motor; 3, outer coating mechanism; 4, inner coating mechanism; 41, material injection pipe; 42, exhaust pipe; 43, drying pipe; 44, tee pipe; 45, communication pipe; 46, liquid discharge pipe; 47, material discharge port; 5, clamping assembly; 51, clamping plate; 511, first sliding groove; 512, second sliding groove; 513, driving groove; 514, communication groove; 52, positioning rod; 53, positioning sleeve; 54, movable groove; 55, mounting groove; 56, movable rod; 57, support part; 58, first spring; 59, expansion groove; 6, switching assembly; 61, driving part; 611, threaded rod; 612, first bevel gear; 613, second bevel gear; 614, second motor; 62, sliding block; 63, first moving rod; 64, second moving rod; 7, guide part; 71, guide block; 72, first guide surface; 73, second guide surface; 8, air bag part; 9, inflation assembly; 91, air bag; 92, second spring; 93, extrusion plate; 94, assembly groove; 95, connection groove. DETAILED DESCRIPTION

[0033] The following description will be made in conjunction with the accompanying Figure 1 - the accompanying Figure 8 A further detailed description of the present application is provided.

[0034] Example 1: The present application discloses a medical catheter surface and lumen coating device.

[0035] Referring to Figure 1 A medical catheter surface and lumen coating device, comprising a device assembly 1, a moving mechanism 2, an outer coating mechanism 3, and an inner coating mechanism 4, the device assembly 1 is provided with a first coating area and a second coating area, the inner coating mechanism 4 is used for coating the outer wall of the catheter in the first coating area, the outer coating mechanism 3 is used for coating the inner wall of the catheter in the second coating area, and the moving mechanism 2 is used for driving the catheter to enter the first coating area and the second coating area.

[0036] The first coating area is provided with an outer soaking tank 11 and a drying tank 12, and the outer coating mechanism 3 comprises a feeding pipe, a hot air pipe and a first heating wire. The feeding pipe is installed on the equipment assembly 1 and is communicated with the outer soaking tank 11, and is used for adding coating liquid into the outer soaking tank 11. The hot air pipe is installed on the equipment assembly 1 and is communicated with the drying tank 12, and one end of the hot air pipe away from the drying tank 12 is communicated with a second air exhaust device. The first heating wire is installed in the hot air pipe and is used for heating the air in the hot air pipe, so as to dry the outer wall of the medical catheter.

[0037] In this embodiment, the moving mechanism 2 comprises a linear module 21 and a cylinder 22. The linear module 21 is arranged on the equipment assembly 1 and is used for driving the medical catheter to move horizontally. The cylinder 22 is installed on the sliding block of the linear module 21 and is used for driving the medical catheter to enter the outer soaking tank 11 / drying tank 12.

[0038] In this embodiment, the driving shaft of the cylinder 22 is provided with a mounting rod 23, the mounting rod 23 is rotatably installed with a mounting plate 24, and the mounting rod 23 is provided with a first motor 25, which is used for driving the mounting plate 24 to rotate. The mounting plate 24 is provided with two groups of clamping assemblies 5, and the two ends of the catheter are connected with the clamping assemblies 5 respectively. When the outer wall of the catheter is coated in the first soaking area, the first motor 25 is used to rotate the mounting plate 24, so that the medical catheter is placed horizontally, which can reduce the volume of the clamping assembly 5 soaked in the outer soaking tank. When the inner wall of the catheter is coated in the second soaking area, the medical catheter is placed vertically.

[0039] At the same time, referring to Figure 2 The clamping assembly 5 comprises a clamping plate 51, a positioning rod 52 and a positioning sleeve 53. The clamping plate 51 is connected with the mounting plate 24. The side of the clamping plate 51 close to the adjacent clamping assembly 5 is provided with a first sliding groove 511 and a second sliding groove 512. The first sliding groove 511 and the second sliding groove 512 are coaxially arranged. The positioning rod 52 is slidingly installed in the first sliding groove 511, and the positioning sleeve 53 is slidingly installed in the second sliding groove 512. The positioning sleeve 53 is used for sleeving the outer wall of the catheter and setting it to a first state. The positioning rod 52 is used for inserting and cooperating with the catheter and setting it to a second state. The clamping assembly 5 is provided with a switching assembly 6 for switching the first state and the second state of the catheter.

[0040] In this embodiment, one group of the positioning rod 52 and the positioning sleeve 53 are arranged. In other embodiments, multiple groups of the positioning rod 52 and the positioning sleeve 53 can be arranged, so that multiple catheters can be installed between the two groups of clamping assemblies 5 to perform coating work at the same time.

[0041] When the catheter is coated on the outer wall in the first soaking area, the mounting plate 24 is rotated by the first motor 25, so that the medical catheter is horizontally placed, the two clamping plates 51 are not soaked in the outer soaking pool at the same time, and the clamping plate 51 is vertically arranged to facilitate the flow of excess coating liquid out of the two clamping plates 51 during the process of taking the two clamping plates 51 out of the outer soaking pool; when the catheter is coated on the inner wall in the second soaking area, the medical catheter is vertically placed to facilitate the coating work on the inner wall of the catheter.

[0042] With reference to Figure 3 and Figure 4 , the switching assembly 6 includes a driving part 61, a sliding block 62, a first moving rod 63 and a second moving rod 64, the clamping plate 51 is provided with a driving groove 513 communicating with the second sliding groove 512, the sliding block 62 is slidingly installed in the driving groove 513, and the sliding direction of the sliding block 62 is arranged in the same direction as the movement direction of the positioning sleeve 53; the driving part 61 is used to drive the sliding block 62 to slide in the driving groove 513.

[0043] With reference to Figure 3 , in the embodiment, the driving part 61 includes a threaded rod 611, a first bevel gear 612, a second bevel gear 613 and a second motor 614, the threaded rod 611 is rotatably installed in the driving groove 513, and the sliding block 62 is provided with a threaded hole threadedly matched with the threaded rod 611; the first bevel gear 612 is fixed to one end of the threaded rod 611, the second motor 614 is installed on the clamping plate 51, and the second bevel gear 613 is installed on the output shaft of the motor for meshing with the first bevel gear 612.

[0044] With reference to Figure 6 , the first moving rod 63 is fixed to the outer wall of the positioning sleeve 53 and located in the driving groove 513, the clamping plate 51 is provided with a communication groove 514, the positioning sleeve 53 is provided with a movement groove 54 for connecting the communication groove 514 and the driving groove 513, and the second moving rod 64 is fixed to the outer wall of the positioning rod 52, and the end portion of the second moving rod 64 is exposed in the driving groove 513 through the communication groove 514 and the movement groove 54.

[0045] The sliding block 62 is provided with a switching part, the switching part includes two controllable electromagnetic parts and two permanent magnets respectively installed on the end portions of the first moving rod 63 and the second moving rod 64, and the two controllable electromagnetic parts are used to cooperate with the two permanent magnets.

[0046] After the medical catheter is coated on the outer surface, the magnetic field of one group of controllable electromagnetic parts is generated to attract the permanent magnet at the end of the first moving rod 63, and the magnetic field of the other group of controllable electromagnetic parts is cancelled, so that the connection between the sliding block 62 and the first moving rod 63 is realized and the connection with the second moving rod 64 is disconnected; then the sliding block 62 is driven to slide in the driving groove 513 by the driving part 61, so that the positioning sleeve 53 is sleeved on the outer wall of the catheter.

[0047] Then, when the magnetic field of one group of controllable electromagnetic parts is generated to attract the permanent magnet at the end of the second moving rod 64, the magnetic field of the other group of controllable electromagnetic parts is cancelled, so that the connection between the sliding block 62 and the second moving rod 64 is realized and the connection with the first moving rod 63 is disconnected; so as to drive the positioning rod 52 to move towards one side of the clamping plate 51 to disengage the positioning rod 52 from the catheter, thereby realizing the switching of the catheter from the second state to the first state.

[0048] Referring to Figure 4 and Figure 5 , the inner wall of the positioning sleeve 53 is provided with a mounting groove 55 which is in communication with the driving groove 513; the movable rod 56 is movably mounted in the mounting groove 55, and the end of the movable rod 56 away from the mounting groove 55 is provided with a supporting portion 57 which is used to abut against one side of the second moving rod 64 away from the medical catheter; the supporting portion 57 can support the positioning rod 52 to avoid the free sliding of the medical catheter when it is sleeved on the outer wall of the positioning rod 52.

[0049] Referring to Figure 5 , the outer wall of the movable rod 56 is sleeved with a first spring 58, and the two ends of the first spring 58 are connected with the supporting portion 57 and the outer wall of the positioning sleeve 53 respectively, and the elastic force of the first spring 58 is used to drive the supporting plate to move towards one side of the positioning rod 52; the inner wall of the driving groove 513 is provided with a guide part 7 which is used to guide the supporting portion 57 to move away from one side of the positioning sleeve 53.

[0050] The guide part 7 comprises a guide block 71, a first guide surface 72 and a second guide surface 73, and the first guide surface 72 and the second guide surface 73 are arranged on the opposite sides of the supporting portion 57 along the moving direction of the positioning sleeve 53; the guide block 71 is fixed to the inner wall of the driving groove 513, and when the supporting portion 57 is in abutting state with the first moving rod 63, the guide block 71 is in abutting state with the first guide surface 72.

[0051] When the first moving rod 63 is connected with the sliding block 62 and drives the end of the positioning sleeve 53 to protrude outside the clamping plate 51, the guide block 71 abuts against the first guide surface 72 of the supporting part 57, so that the supporting part 57 can be driven to move towards the side away from the positioning sleeve 53, and the supporting part 57 can smoothly pass through the end of the second moving rod 64; conversely, when the sliding block 62 drives the end of the positioning rod 52 to protrude outside the clamping plate 51, and then the positioning sleeve 53 completely enters the second sliding groove 512, the guide block 71 abuts against the second guide surface 73 to guide the supporting part 57 to move towards the side away from the positioning sleeve 53, so that the supporting part 57 can smoothly pass through the end of the second moving rod 64, and the supporting part 57 can be re-abutted against the second moving rod 64 under the elastic force of the first spring 58.

[0052] The outer wall of the positioning rod 52 is wrapped with a rubber layer, which can increase the stability of the catheter and the positioning rod 52 in the plug connection; and when the positioning rod 52 completely enters the clamping plate 51, the friction between the positioning rod 52 and the catheter can make one side of the catheter abut against the clamping plate 51, so as to avoid the situation that the coating liquid enters the end of the catheter when the inner wall of the catheter is coated.

[0053] With reference to Figure 1 and Figure 2 , the second coating area is provided with a liquid receiving groove 13, the inner coating mechanism 4 includes a feeding pipe 41, an exhaust pipe 42 and a drying pipe 43, one of the positioning rods 52 is provided with a feeding port, the clamping plate 51 is provided with a communication pipe 45 connected with the positioning rod 52, the communication pipe 45 is connected with the feeding port, and the communication pipe 45 is a flexible pipe; the end of the communication pipe 45 away from the positioning rod 52 is provided with a three-way pipe 44, the feeding pipe 41, the exhaust pipe 42 and the drying pipe 43 are connected with the three-way pipe 44.

[0054] The end of the feeding pipe 41 away from the communication pipe 45 is provided with a feeding device for injecting the coating liquid into the catheter; the end of the exhaust pipe 42 away from the communication pipe 45 is provided with a first air extraction device for discharging the excess coating liquid in the catheter; the end of the drying pipe 43 away from the communication pipe 45 is provided with a drying device for drying the inner wall of the catheter; since the feeding device, the first air extraction device and the first drying device are all existing devices, they will not be described here.

[0055] With reference to Figure 2 and Figure 6 , the other positioning rod 52 is provided with a discharge port 47, the clamping plate 51 is provided with a liquid discharge pipe 46 connected with the positioning rod 52, the liquid discharge pipe 46 is also a flexible pipe, and the liquid discharge pipe 46 is provided with a valve; after the excess coating liquid in the catheter is discharged, the liquid receiving groove 13 can receive the coating liquid to enable the coating liquid to be reused.

[0056] The implementation principle of the medical catheter surface and inner cavity coating device is as follows: When the coating layer is coated on the catheter, the two ends of the catheter are respectively inserted into the positioning rods 52 of the two clamping plates 51, at this time the outer surface of the catheter can be exposed to the outside, and the outer coating mechanism 3 can coat and dry the outer wall of the catheter; then the switching assembly 6 is used to switch the catheter from the second catheter to the first state, which can realize stable fixation of the catheter and avoid shielding of the inner wall of the catheter, at this time the inner coating mechanism 4 can coat the inner wall of the catheter.

[0057] The device is convenient for coating the inner cavity of the medical catheter, and neither shields the inner and outer surfaces of the medical catheter, thereby avoiding the generation of a catheter coating dead angle, and further improving the coating quality of the medical catheter.

[0058] The embodiment also discloses a coating method of the medical catheter surface and inner cavity coating device, and specifically comprises the following steps: S1, coating preparation, adding coating liquid into the outer soaking tank 11 and the feeding equipment to ensure sufficient coating liquid for coating the medical catheter; then the clamping assembly 5 is moved to the upper side of the outer soaking tank through the linear module 21.

[0059] S2, installing the medical catheter, the end of the positioning rod 52 is driven to extend out of the outer world through the second motor 614, and the positioning sleeve 53 is in the clamping plate 51; then the two ends of the catheter are respectively inserted into the positioning rods 52 of the two clamping plates 51.

[0060] S3, performing outer coating work, the medical catheter is immersed in the coating liquid in the outer soaking tank by the cylinder 22 and stays for a period of time; then the medical catheter after soaking is dried in the drying groove 12 through the linear module 21 and the cylinder 22, so that the coating liquid is solidified on the outer wall of the catheter; S4, moving the catheter, the medical catheter is transferred from the first coating area to the upper side of the receiving groove through the linear module 21; the sliding block 62 is fixed with the first moving rod 63 through the controllable electromagnetic part, then the second cylinder 22 drives the threaded rod 611 to rotate, drives the end of the positioning sleeve 53 to extend out of the clamping plate 51, then one of the controllable electromagnetic parts generates a magnetic field to attract the permanent magnet at the end of the second moving rod 64, and the magnetic field of the other controllable electromagnetic part disappears, so that the sliding block 62 is connected with the second moving rod 64 and disconnected with the first moving rod 63; the threaded rod 611 is driven to rotate in a direction, so that the ends of the positioning rods 52 are withdrawn into the clamping plates 51; S5, performing inner coating work, opening the valve of the drainage pipe 46, then injecting the coating liquid into the medical catheter through the feeding pipe 41, at this time the air in the medical catheter can be discharged to the outside through the drainage pipe 46, and after the coating liquid fills the entire medical catheter, the drainage pipe 46 is closed, so that the coating liquid stays in the catheter for a period of time.

[0061] Then the exhaust pipe 42 and the liquid discharge pipe 46 are opened, and the excess coating liquid on the inner wall of the medical catheter is discharged from the liquid discharge pipe 46; then hot air is introduced into the medical catheter through the drying pipe 43, so that the coating of the inner wall of the medical catheter can be completed, and finally the catheter is taken out of the two clamping plates 51.

[0062] Embodiment 2: The embodiment 2 of the present application discloses a medical catheter surface and lumen coating device.

[0063] With reference to Figure 7 The difference between the embodiment 2 and the embodiment 1 of the present application is that the positioning sleeve 53 is provided with at least two expansion grooves 59, and all the expansion grooves 59 are uniformly and spacedly arranged along the inner circumferential wall of the positioning sleeve 53; the expansion grooves 59 are provided with air bag members 8, and all the air bag members 8 are connected.

[0064] With reference to Figure 8 The clamping plate 51 is provided with an inflation assembly 9, which is connected with one of the air bag members 8 and is used for inflating / deflating all the air bag members 8. In the embodiment, the inflation assembly 9 includes an air bag 91 and a second spring 92, and the clamping plate 51 is provided with an assembly groove 94, the air bag 91 is installed in the assembly groove 94 and is connected with one of the air bag members 8; one side of the air bag 91 is attached with a pressing plate 93, and the clamping plate 51 is provided with a connecting groove 95 for connecting the assembly groove 94 and the driving groove 513, and one end of the pressing plate 93 is arranged in the connecting groove 95 and is used for abutting against the side of the second moving rod 64 close to the supporting portion 57.

[0065] The second spring 92 is installed in the air bag 91, and the elastic force of the second spring 92 is used to drive the end of the pressing plate 93 to abut against the second moving rod 64 in a normal state. After the positioning sleeve 53 is sleeved on the outer wall of the medical catheter and the positioning rod 52 is slid into the first sliding groove 511, the second moving rod 64 drives the pressing plate 93 to slide, so as to press the air bag member 8; so that the air bag member 8 abuts tightly against the outer wall of the medical catheter, further reducing the disengagement of the medical catheter from the positioning sleeve 53.

[0066] The above is the preferred embodiment of the present application, which does not limit the protection scope of the present application, therefore: all equivalent changes made according to the structure, shape, principle of the present application shall be covered within the protection scope of the present application.

Claims

1. A device for coating the surface and inner lumen of a medical catheter, characterized in that: The device assembly (1), the moving mechanism (2), the external coating mechanism (3), and the internal coating mechanism (4) are included. The device assembly (1) has a first coating area and a second coating area. The external coating mechanism (3) is used to coat the outer wall of the catheter in the first coating area. The internal coating mechanism (4) is used to coat the inner wall of the catheter in the second coating area. The moving mechanism (2) is used to drive the catheter into the first / second coating area. The moving mechanism (2) is provided with two clamping assemblies (5) for connecting to both ends of the catheter. The clamping assembly (5) includes a clamping plate (51) and a positioning rod (52) and a positioning sleeve (53) slidably mounted on the clamping plate (51). The positioning sleeve (53) is used to fit the outer wall of the catheter, and the positioning rod (52) is used to insert into the inner wall of the catheter. The positioning sleeve (53) is fitted onto the outer wall of the conduit in the first state, and the positioning rod (52) is inserted into the inner wall of the conduit in the second state; the clamping plate (51) is provided with a switching component (6), which is used to switch the first / second state of the conduit.

2. The medical catheter surface and lumen coating device according to claim 1, characterized in that: The switching assembly (6) includes a driving component (61), a sliding block (62), a first moving rod (63) and a second moving rod (64). The clamping plate (51) has a driving groove (513) for the sliding block (62) to slide. The driving component (61) is used to drive the sliding block (62) to reciprocate within the driving groove (513). The first moving rod (63) is fixed to the outer wall of the positioning sleeve (53) and located in the drive groove (513); the second moving rod (64) is fixed to the outer wall of the positioning rod (52); the clamping plate (51) has a connecting groove (514); the positioning sleeve (53) has a movable groove (54) for connecting the connecting groove (514) and the drive groove (513); the end of the second moving rod (64) passes through the connecting groove (514) and the drive groove (513) in sequence and enters the drive groove (513); the sliding block (62) is provided with a switching component, which is used to drive the sliding block (62) to connect with the first / second moving rod (64) respectively.

3. The medical catheter surface and lumen coating device according to claim 2, characterized in that: The switching component includes two controllable electromagnetic parts and two permanent magnets. The two controllable electromagnetic parts are both disposed on the sliding block (62), and the two permanent magnets are respectively installed at the ends of the first moving rod (63) and the second moving rod (64). The controllable electromagnetic parts are used to cooperate with the permanent magnets. When one set of controllable electromagnetic parts generates a magnetic field that attracts the permanent magnet at the end of the first moving rod (63), the magnetic field of the other set of controllable electromagnetic parts disappears, thereby realizing the connection between the sliding block (62) and the first moving rod (63) and disconnecting the connection with the second moving rod (64); and vice versa.

4. The medical catheter surface and lumen coating device according to claim 2, characterized in that: A support part (57) is movably installed on the outer wall of the positioning sleeve (53). The support part (57) is used to abut against the side of the second moving rod (64) away from the adjacent clamping plate (51). A first spring (58) is provided between the support part (57) and the positioning sleeve (53). The elastic force of the first spring (58) is used to drive the support part (57) to move toward the side closer to the positioning sleeve (53). A guide part (7) is provided on the inner wall of the drive groove (513) for driving the support part (57) to move toward the side away from the positioning sleeve (53).

5. The medical catheter surface and lumen coating device according to claim 4, characterized in that: The guide component (7) includes a guide block (71), a first guide surface (72), and a second guide surface (73). The guide block (71) is fixed to the inner wall of the drive groove (513). The first guide surface (72) and the second guide surface (73) are disposed on opposite sides of the support part (57) along the moving direction of the positioning sleeve (53). The first guide surface (72) and the second guide surface (73) are both used to cooperate with the guide block (71) to guide the support part (57) to move toward the side away from the positioning sleeve (53).

6. The medical catheter surface and lumen coating device according to claim 2, characterized in that: The outer wall of the positioning rod (52) is covered with a rubber layer.

7. The medical catheter surface and inner lumen coating device according to claim 2, characterized in that: The inner wall of the positioning sleeve (53) is provided with an airbag component (8), which is used to abut against the outer wall of the conduit. The clamping plate (51) is provided with an inflation component (9) for inflating / deflating the airbag component (8).

8. The medical catheter surface and inner lumen coating device according to claim 1, characterized in that: The internal coating mechanism (4) includes an injection pipe (41), an exhaust pipe (42), and a drying pipe (43). One of the clamping plates (51) is provided with a connecting pipe (45), which is used to communicate with the inside of the conduit. The injection pipe (41), the exhaust pipe (42), and the drying pipe (43) are all connected to the connecting pipe (45). The end of the injection pipe (41) away from the connecting pipe (45) is provided with a feeding device. The end of the exhaust pipe (42) away from the connecting pipe (45) is provided with a first exhaust device. The end of the drying pipe (43) away from the connecting pipe (45) is provided with a drying device. The other clamping plate (51) is provided with a drain pipe (46) for communicating with the inside of the conduit. The drain pipe (46) is provided with a valve.

9. A coating method based on the medical catheter surface and lumen coating device according to any one of 1-8, characterized in that, Specifically, the following steps are included: S1, coating preparation, add coating liquid into the inner coating mechanism (4) and the outer coating mechanism (3), and move the two sets of clamping components (5) to the first coating area; S2, install the medical catheter, use the switching assembly (6) to extend the ends of the positioning rods (52) of the two clamping plates (51) out to the outside, and then insert the two ends of the medical catheter into the two positioning rods (52) respectively. S3, perform external coating work, and use the external coating mechanism (3) to coat the outer wall of the medical catheter to form a coating; S4, move the catheter, transfer the medical catheter from the first coating area to the second coating area through the moving mechanism (2); and extend the end of the positioning sleeve (53) out of the clamping plate (51) through the switching component (6), and retract the ends of the positioning rod (52) into the clamping plate (51). S5, perform internal coating work, use the internal coating mechanism (4) to coat the inner wall of the medical catheter to form a coating, and complete the internal and external coating work of the medical catheter; finally, remove the catheter from between the two clamping plates (51).

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