PTFE catheter oil repellent coating device

Abstract

The utility model discloses a kind of PTFE catheter oil-removing layer coating devices, including catheter, and the periphery of catheter is equipped with spray head, and both sides of spray head are equipped with limiting sleeve, and the lower side of spray head is equipped with sliding block and slide rail, and one side of limiting sleeve is equipped with pull ring, and spray head, limiting sleeve are all installed in the top of sliding block by connecting block, and spray head includes annular shell, and the middle part of annular shell is equipped with the spray groove of sinking design, and several linear jet nozzles are embedded and installed on the inner wall of spray groove, and linear jet nozzle is connected with the cavity in the inside of annular shell, and the inner diameter size of annular shell is greater than the outer diameter size of catheter, and the area between the inner diameter of annular shell to the outer diameter of catheter is defined as coating adhesion zone;The utility model has the advantages of good coating uniformity, simple maintenance, low processing cost.

Description

Technical Field

[0001] This utility model belongs to the technical field of spraying equipment, and in particular relates to a PTFE conduit oleophobic coating device. Background Technology

[0002] Polytetrafluoroethylene (PTFE) catheters are widely used in interventional medical devices due to their excellent chemical stability and biocompatibility. However, PTFE has a low surface energy and insufficient oleophobic properties, making it prone to adsorbing lipid components from the blood during clinical use. This can increase the risk of thrombosis and also affect the catheter's delivery and maneuverability.

[0003] In existing technologies, the coating methods for oleophobic layers of PTFE conduits mainly include dip coating, spray coating, and chemical vapor deposition. Dip coating is difficult to control the uniformity of coating thickness and is prone to forming unnecessary coatings on the inner wall of the conduit; although spray coating can achieve coating on the outer surface of the conduit, conventional single-nozzle spraying equipment cannot guarantee the uniform deposition of coating particles on the conduit surface, resulting in unstable oleophobic layer quality; chemical vapor deposition equipment is expensive, the process is complex, and the production cost is high, making it unsuitable for large-scale industrial production.

[0004] Therefore, there is an urgent need for a coating device that can achieve uniform coating of oleophobic layer on the outer surface of PTFE conduit, with simple structure and convenient operation. Utility Model Content

[0005] The purpose of this invention is to provide a PTFE conduit oleophobic coating device to solve the problems of poor coating uniformity, complex process, and high cost of existing coating methods mentioned in the background art.

[0006] This utility model achieves the above-mentioned objective through the following technical solution: it includes a conduit, a spray head is provided on the outer periphery of the conduit, a limiting sleeve is installed on both sides of the spray head, a slider and a slide rail are provided below the spray head, and a stretching ring is provided on one side of the limiting sleeve.

[0007] Furthermore, both the spray head and the limiting sleeve are mounted on the top of the slider via a connecting block.

[0008] Furthermore, the spray head includes an annular housing with a recessed spray groove in the middle. Several linear jet nozzles are embedded in the inner wall of the spray groove. The linear jet nozzles are connected to the cavity inside the annular housing. The inner diameter of the annular housing is larger than the outer diameter of the conduit. The area between the inner diameter of the annular housing and the outer diameter of the conduit is defined as the coating adhesion area.

[0009] Furthermore, a three-hole pipe is installed through the top of the annular shell, at least one of the three holes of which is connected to a high-pressure gas source, and the remaining holes are connected to a coating particle silo.

[0010] Furthermore, the coating particles are accelerated to extremely high speeds by a high-pressure airflow and then pass through a straight jet nozzle to impact the surface of the conduit from multiple angles, thereby depositing and forming a coating.

[0011] Furthermore, an arc-shaped guide groove is provided below the inner wall of each of the two limiting sleeves. The length of the arc-shaped guide groove is the same as that of the limiting sleeve, and one end of the groove is connected to the coating adhesion area.

[0012] Furthermore, the arc-shaped guide channel directs the airflow and unattached paint particles to the outside.

[0013] Furthermore, the stretching ring is sleeved on the outside of the guide tube, and its bottom is connected to the connecting block via a connecting rod. The stretching ring is located in the front end area of ​​the spray head.

[0014] Furthermore, the stretching ring straightens the guide tube, making it easier for it to slide into the spray head while maintaining a straight line for spraying.

[0015] Beneficial effects: This utility model has a reasonable design, simple and stable structure, and strong practicality, and has the following beneficial effects:

[0016] 1. In this utility model, by setting multiple linear jet nozzles on the inner wall of the spray tank, the paint particles impact the surface of the guide tube at high speed from different angles, which can effectively improve the uniformity and adhesion of the coating.

[0017] 2. In this utility model, a combination of slider and slide rail is used to enable the spray head and the limiting sleeve to move synchronously, which facilitates continuous coating of the conduit and improves production efficiency.

[0018] 3. In this utility model, the arc-shaped guide groove inside the limiting sleeve discharges the unattached paint particles, reducing the accumulation of paint inside the equipment and lowering the difficulty of later cleaning and maintenance. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 This is a cross-sectional view of the structure of this utility model;

[0021] Figure 3 This is a schematic diagram of part A of the present invention.

[0022] In the diagram: 1-Conduit, 2-Spray head, 3-Limiting sleeve, 4-Slider, 5-Slide rail, 6-Extension ring, 7-Connecting block;

[0023] 21-Annular shell, 22-Spraying groove, 23-Linear jet nozzle, 24-Coating adhesion area, 25-Three-hole pipe, 31-Arc-shaped guide groove, 61-Connecting rod. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0025] Combination Figures 1 to 3 The device shown is an oleophobic coating device for a PTFE conduit, including a conduit 1, a spray head 2 on the outer periphery of the conduit 1, a limiting sleeve 3 on both sides of the spray head 2, a slider 4 and a slide rail 5 below the spray head 2, and a stretching ring 6 on one side of the limiting sleeve 3.

[0026] The spray head 2 and the limiting sleeve 3 are both installed on the top of the slider 4 via the connecting block 7.

[0027] The spray head 2 includes an annular housing 21. The annular housing 21 has a recessed spray groove 22 in the middle. Several linear jet nozzles 23 are embedded in the inner wall of the spray groove 22. The linear jet nozzles 23 are connected to the cavity inside the annular housing 21. The inner diameter of the annular housing 21 is larger than the outer diameter of the conduit 1. The area between the inner diameter of the annular housing 21 and the outer diameter of the conduit 1 is defined as the coating adhesion area 24.

[0028] A three-hole pipe 25 is installed through the top of the annular shell 21. At least one of the three holes in the pipe 25 is connected to a high-pressure gas source, and the remaining holes are connected to the coating particle silo.

[0029] The coating particles are accelerated to extremely high speeds by a high-pressure airflow and then pass through a straight jet nozzle 23 to impact the surface of the conduit from multiple angles, thereby depositing and forming a coating.

[0030] Both limiting sleeves 3 have arc-shaped guide grooves 31 at the bottom of their inner cylinder walls. The length of the arc-shaped guide grooves 31 is the same as that of the limiting sleeves 3, and one end of the grooves is connected to the coating adhesion area 24.

[0031] The arc-shaped guide channel 31 directs the airflow and unattached paint particles to the outside.

[0032] The stretching ring 6 is sleeved on the outside of the guide tube 1, and its bottom is connected to the connecting block 7 through the connecting rod 61. The stretching ring 6 is located in the front end area of ​​the spray head 2.

[0033] The stretching ring 6 straightens the guide tube 1, making it easier for it to slide into the spray head 2 in a straight line for spraying.

[0034] Working principle: When using this utility model, the conduit 1 is passed through the stretching ring 6, the limiting sleeve 3 and the spray head 2, and the two ends of the conduit 1 are fixed; the high-pressure air source and the paint particle delivery system are started, and the high-pressure airflow accelerates the paint particles to extremely high speed and then sprays them onto the outer surface of the conduit 1 through the straight jet nozzle 23. Since the straight jet nozzle 23 is evenly distributed on the inner wall of the spray tank 22, the paint particles can impact the surface of the conduit 1 from multiple angles, thereby forming a uniform oleophobic layer on the surface of the conduit 1.

[0035] During the spraying process, the slider 4 moves along the slide rail 5 under the action of the drive device, driving the spray head 2 and the limiting sleeve 3 to move synchronously, thereby achieving continuous coating of the outer surface of the conduit 1. Paint particles and airflow that do not adhere to the surface of the conduit 1 are discharged outside the device through the arc-shaped guide groove 31 inside the limiting sleeve 3;

[0036] The stretching ring 6 plays the role of straightening the guide tube 1 during the spraying process, ensuring that the guide tube 1 remains in a straight state when entering the spray head 2, thereby ensuring the uniformity and quality of the coating. By adjusting parameters such as the moving speed of the slider 4, the pressure of the high-pressure airflow, and the delivery amount of paint particles, the thickness and quality of the coating can be controlled to meet different application requirements.

[0037] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0038] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A PTFE conduit oleophobic coating device, comprising a conduit (1), characterized in that: The outer periphery of the conduit (1) is provided with a spray head (2), and a limiting sleeve (3) is installed on both sides of the spray head (2). A slider (4) and a slide rail (5) are provided below the spray head (2), and a stretching ring (6) is provided on one side of the limiting sleeve (3).

2. The PTFE conduit oleophobic coating device according to claim 1, characterized in that: The spray head (2) and the limiting sleeve (3) are both installed on the top of the slider (4) via the connecting block (7).

3. The PTFE conduit oleophobic coating device according to claim 2, characterized in that: The spray head (2) includes an annular housing (21), and a recessed spray groove (22) is provided in the middle of the annular housing (21). Several linear jet nozzles (23) are embedded in the inner wall of the spray groove (22). The linear jet nozzles (23) are connected to the cavity inside the annular housing (21). The inner diameter of the annular housing (21) is larger than the outer diameter of the conduit (1). The area between the inner diameter of the annular housing (21) and the outer diameter of the conduit (1) is defined as the coating adhesion area (24).

4. The PTFE conduit oleophobic coating device according to claim 3, characterized in that: The top of the annular shell (21) is equipped with a three-hole pipe (25), at least one of the three holes of the pipe (25) is connected to a high-pressure gas source, and the remaining holes are connected to the coating particle silo.

5. The PTFE conduit oleophobic coating device according to claim 4, characterized in that: Both of the limiting sleeves (3) have an arc-shaped guide groove (31) below the inner wall of each of the two limiting sleeves (3). The length of the arc-shaped guide groove (31) is the same as that of the limiting sleeve (3), and one end of the groove is connected to the coating attachment area (24).

6. The PTFE conduit oleophobic coating device according to claim 5, characterized in that: The stretching ring (6) is sleeved on the outside of the guide tube (1), and its bottom is connected to the connecting block (7) through the connecting rod (61). The stretching ring (6) is located in the front end area of ​​the spray head (2).

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