A coating treatment apparatus

Abstract

The utility model discloses a kind of coating treatment equipment, comprising: heating component, liquid storage component, control component, monitoring component and air-drying component.The utility model in multiple groups of flow pipeline are equipped with temperature sensor, liquid level flowmeter and pressure sensor, cooperate peristaltic pump, switching valve and pipe clamp valve and form closed-loop control system, the accurate control of pressure, flow and temperature when synchronously coating treatment to multiple pipes, effectively shorten single batch processing time, while, can effectively improve coating uniformity, and reduce product failure rate;Multiple groups of flow pipeline end are provided with non-return valve, and with air air-drying pipeline T type butt joint, emptying and airflow introduction are realized by switching valve, and connecting part is inclined, cooperate certain pressure air pressure cleaning before coating treatment can fully exclude residual liquid, when filling grafting liquid from top to bottom, air bubble can be fully discharged.

Description

Technical Field

[0001] This utility model relates to the field of medical device processing equipment technology, specifically to a coating treatment device. Background Technology

[0002] When tubular medical devices (such as vascular catheters and stents) are implanted in the human body, contact between blood and the device surface triggers a coagulation cascade reaction, leading to platelet adhesion, aggregation, and thrombus formation. This can not only cause complications such as vascular blockage and tissue ischemia, but also affect the normal function and lifespan of the device. Heparin, as a natural anticoagulant, can be grafted onto the device surface through a coating treatment to continuously inhibit the activity of coagulation factors and prevent platelet adhesion and aggregation, effectively reducing the risk of thrombosis. At the same time, this coating treatment can also reduce the stimulation of blood components by the device, reduce the probability of inflammatory response and infection, extend the service life of the device in the body, and provide patients with safer treatment protection.

[0003] Currently, existing tubular medical device coating equipment cannot accurately and independently control the pressure and flow rate of the solution in each channel when processing multiple tubes in parallel, resulting in inconsistent coating effects; the solution filling process lacks an effective venting mechanism, and residual air bubbles in the lumen can damage the coating quality; after the cleaning process, the cleaning solution is difficult to completely drain, which can easily cause cross-contamination of the solution, resulting in a low product yield. Utility Model Content

[0004] The purpose of this invention is to provide a coating treatment device to solve the above problems.

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

[0006] Heating components, including a water bath and a heating device, are used to heat and maintain a constant temperature of liquids;

[0007] A liquid storage assembly, including a first liquid storage container and a second liquid storage container, is used to store and quantitatively release liquid;

[0008] The control components, including a drive pump, a switching valve, and a clamp valve, are used to switch the flow path and control the flow path.

[0009] As a further description of the above technical solution, the water bath is disposed on one side of the working platform, and multiple sets of first liquid storage containers are disposed on one side of the water bath.

[0010] As a further description of the above technical solution, the first liquid storage container is connected to the second liquid storage container through a flow pipeline via multiple sets of flow pipelines, and each set of flow pipelines is equipped with a first peristaltic pump and a switching valve.

[0011] As a further description of the above technical solution, multiple sets of the second liquid storage containers are arranged in the middle and on the other side of the working platform, and the second liquid storage containers are connected to the pipe to be processed through a flow pipeline.

[0012] As a further description of the above technical solution, the pipe to be processed is placed on the telescopic frame, and the pipe to be processed is placed horizontally.

[0013] As a further description of the above technical solution, the second liquid storage container is connected to the pipe to be processed through multiple sets of flow pipelines, and each set of flow pipelines is equipped with a second peristaltic pump and a pipe clamp valve.

[0014] As a further description of the above technical solution, a one-way check valve is provided at the end of the flow pipeline, and the flow pipeline is connected to the external gas line in a T-shaped flow path.

[0015] As a further description of the above technical solution, the connection part of the flow pipeline is inclined, and the inclination angle of the flow pipeline is 15-30°.

[0016] As a further description of the above technical solution, a monitoring component is also included. The monitoring component includes a temperature sensor, a liquid level flow meter, and a pressure sensor. The temperature sensor is disposed on one side of the heating device, the liquid level flow meter is disposed on one side of the second liquid storage container, and the pressure sensor is disposed on the flow pipeline.

[0017] As a further description of the above technical solution, a drying assembly is also included. The drying assembly includes an exhaust hood, a flow control chamber, and an exhaust fan. The flow control chamber is located at the bottom of the second liquid storage container, the exhaust hood is located on one side of the flow control chamber, and the exhaust fan is located on the other side of the flow control chamber.

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

[0019] 1. In this utility model, multiple sets of flow pipelines are equipped with temperature sensors, liquid level flow meters and pressure sensors, which, together with peristaltic pumps, switching valves and pipe clamp valves, form a closed-loop control system. This system can accurately control the pressure, flow and temperature of multiple pipes simultaneously during coating treatment, effectively shortening the processing time of a single batch, improving coating uniformity and reducing product defect rate.

[0020] 2. In this utility model, one-way check valves are installed at the ends of multiple sets of flow pipelines and are connected to the air drying pipeline in a T-shape. The cleaning liquid is drained and the airflow is introduced by switching valves. The connection part is inclined. Before coating treatment, the residual liquid can be fully removed by air pressure cleaning with a certain pressure. When the grafting liquid is filled from top to bottom, the air bubbles can be fully discharged.

[0021] To more clearly illustrate the structural features and functions of this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the coating treatment equipment of this utility model. Figure 1 ;

[0023] Figure 2 This is a schematic diagram of the structure of the coating treatment equipment of this utility model. Figure 2 ;

[0024] Figure 3 This is a front view of the coating treatment equipment of this utility model;

[0025] Figure 4 yes Figure 3 Enlarged view of point A in the middle;

[0026] Figure 5 This is a schematic diagram of the principle of the coating treatment equipment of this utility model.

[0027] Figure label:

[0028] 1. Heating assembly; 11. Water bath; 12. Heating device; 2. Liquid storage assembly; 21. First liquid storage container; 22. Second liquid storage container; 3. Control assembly; 31. Drive pump; 311. First peristaltic pump; 312. Second peristaltic pump; 32. Switching valve; 33. Pinch valve; 34. One-way check valve; 4. Working platform; 5. Pipe to be processed; 6. Telescopic frame; 7. Monitoring assembly; 71. Temperature sensor; 72. Liquid level and flow meter; 73. Pressure sensor; 8. Drying assembly; 81. Exhaust hood; 82. Flow control chamber; 83. Exhaust fan. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0030] like Figures 1-5 As shown, in one embodiment, a coating treatment apparatus includes: a heating component 1, a liquid storage component 2, a control component 3, a monitoring component 7, and a drying component 8.

[0031] The heating component 1 includes a water bath 11 and a heating device 12, which are used to heat and maintain the liquid at a constant temperature; the liquid storage component 2 includes a first liquid storage container 21 and a second liquid storage container 22, which are used to store and quantitatively release the liquid; in addition, the control component 3 includes a drive pump 31, a switching valve 32 and a clamp valve 33, which are used to switch the flow pipeline path and control the flow pipeline on / off.

[0032] Understandably, the aforementioned components can automatically match the optimal processing scheme based on the input parameters of tubular medical devices through an external PLC controller and host computer display, using a built-in processing technology library for various pipe diameters and materials. This enables the setting of coating processing parameters and the automated operation and real-time monitoring of coating processing progress, while improving equipment versatility and effectively reducing manual debugging time.

[0033] Specifically, the water bath 11 is located on one side of the work platform 4 and is used to heat the liquid storage component 2; while multiple sets of first liquid storage containers 21 are provided on one side of the water bath 11 for storing different grafting solutions; the heating device 12 is located above the workbench and can adopt a dual temperature control design of immersion electric heating rod and externally wrapped heating tape (as prior art, it is not shown in the figure), and automatically calculates the optimal PID parameters based on the Ziegler-Nichols method (response time < 15s, temperature fluctuation range controlled within ±0.5℃), thereby meeting the constant temperature cycling requirements of 60-80℃.

[0034] Furthermore, the first liquid storage container 21 is connected to the second liquid storage container 22 via multiple sets of flow pipes, and each set of flow pipes is equipped with a first peristaltic pump 311 and a switching valve 32. The first peristaltic pump 311 is used to drive the grafted liquid in the first liquid storage container 21 to flow to the second liquid storage container 22, while the switching valve 32 is used to switch the flow pipe path from the first liquid storage container 21 to the second liquid storage container 22. In addition, a high-precision solenoid valve group set on one side of the second liquid storage container 22, in conjunction with a mass flow meter, achieves bidirectional compensation (bidirectional flow error <3%, pressure fluctuation <±0.005MPa), ensuring high stability and accuracy of solution pressure and flow. An accumulator can also be set (as prior art, not shown in the figure). During solution flow, the accumulator can automatically absorb or release energy, effectively buffering pressure pulsations and avoiding the impact of instantaneous pressure changes on the stability of solution delivery, further improving the reliability of solution pressure and flow control in each passage when multiple pipes are processed simultaneously.

[0035] Correspondingly, multiple sets of second liquid storage containers 22 are set in the middle and on the other side of the working platform 4, and the second liquid storage containers are connected to the pipe to be processed 5 through a flow pipeline.

[0036] Specifically, the second liquid storage container 22 is connected to the pipe to be processed 5 through multiple sets of flow pipelines. Each set of flow pipelines is equipped with a second peristaltic pump 312 and a pipe clamp valve 33. The second peristaltic pump 312 is used to drive the grafting liquid in the second liquid storage container 22 to flow to the pipe to be processed 5 and then to the corresponding second liquid storage container 22. The pipe clamp valve 33 is used to control the opening and closing of the flow pipeline from the second liquid storage container 22 to the second liquid storage container 22.

[0037] For example, the coating treatment equipment of this application is equipped with 10 sets of parallel independent flow pipelines, each set of flow pipelines is equipped with a temperature sensor 71, a liquid level flow meter 72 and a pressure sensor 73; at the same time, it is combined with a peristaltic pump, a switching valve 32 and a pipe clamp valve 33 to form a closed-loop control system, which can accurately control the pressure, flow and temperature when coating multiple pipes simultaneously, effectively shortening the processing time of a single batch, improving the uniformity of the coating and reducing the product defect rate.

[0038] It should be noted that the cleaning fluid can be delivered in one go using a separate transfer pump. After cleaning, air can be introduced using an air pump to remove residual cleaning fluid (as prior art, it is not shown in the figure). Each of the multiple sets of flow pipelines is equipped with a one-way check valve 34, which is connected to the air drying pipeline in a T-shape. The cleaning fluid is drained and airflow is introduced through the switching valve 32. The connection part is inclined (the inclination angle of the flow pipeline is 15-30°). When the grafting liquid is filled from top to bottom, air bubbles can be fully discharged. After the coating treatment is completed, air pressure cleaning at a certain pressure (the cleaning pressure of the flow pipeline is 0.1-0.2MPa) can be used to fully remove residual liquid.

[0039] In addition, the inlet section of the pipe 5 to be processed and each flow pipe is a pre-filled negative pressure chamber, and the negative pressure chamber can be connected by a vacuum pump. Before filling with liquid, the pipe body will be evacuated (evacuated to -0.05MPa) before the fluid is injected. An ultrasonic bubble sensor (with an accuracy of 50μm) can be set at the end of the flow pipe, which can effectively eliminate gaps and bubbles in the pipe cavity (bubble residue rate <0.5%), thereby making the inner wall of the pipe cavity in complete contact with the solution and effectively improving the uniformity of the coating.

[0040] For example, the tube 5 to be processed is placed on the telescopic frame 6 and is placed horizontally. The length of the telescopic frame 6 can be intelligently adjusted according to the size of the tube 5 to be processed. The circulation pipeline can be made of corrosion-resistant and heat-resistant materials (such as polytetrafluoroethylene). The connection part of the circulation pipeline can adopt a quick-change modular design and be equipped with various specifications of adapters to adapt to various tubular medical device products of different specifications (inner diameter of 3-12mm and wall thickness of 0.5-2mm).

[0041] Furthermore, the monitoring component 7 includes a temperature sensor 71, a level and flow meter 72, and a pressure sensor 73. The temperature sensor 71 is located on one side of the heating device 12 and can monitor the temperature change of the coating station area below the heating device 12 in real time. Multiple sets of temperature sensors 71 can also be installed at the outlet of the liquid storage component 2, the inlet of the flow pipeline, and key nodes of the circulation loop to monitor the liquid temperature in real time. The level and flow meter 72 is located on one side of the second liquid storage container 22 and can monitor the liquid level of the second liquid storage container 22 and accurately adjust the flow rate (adjustment range is 0-100ml / min). In addition, the pressure sensor 73 is located on the flow pipeline and can monitor the pressure of the flow pipeline in real time (monitoring range is 0.01-0.1MPa, so that the pressure fluctuation of the flow pipeline is ≤±0.003MPa and the flow error is <2%), meeting the requirements of high-precision processing.

[0042] Furthermore, the air-drying component 8 includes an exhaust hood 81, a flow control chamber 82, and an exhaust fan 83. The flow control chamber is located at the bottom of the second liquid storage container 22 and has precise diversion and convergence channels inside, which can be used to divert and converge the flow when cleaning the circulation pipeline. Correspondingly, the exhaust hood 81 is located on one side of the flow control chamber 82, and the exhaust fan is located on the other side of the flow control chamber 82. Dry air is introduced into the circulation pipeline through an external air pump to dry the inner wall of the pipeline. According to parameters such as pipe specifications, pipe diameter, and residual liquid volume, appropriate air pressure and blowing time are set to ensure that the inner wall of the pipe 5 to be processed is dry.

[0043] Working principle:

[0044] Taking the processing of 10 fiber optic tubes with an inner diameter of 6 mm and a wall thickness of 0.8 mm as an example;

[0045] (1) Solution filling: After the operator inputs the tube parameters through the touch screen of the host computer, the control unit will automatically match the processing plan: first, the pre-filled negative pressure chamber of the 10 channels is evacuated to -0.05MPa, then the flow pipeline of the first liquid storage container 21 is switched to open the flow pipeline of the second liquid storage container 22, and the circulating liquid is injected at a flow rate of 50ml / min. The pressure sensor 73 provides real-time feedback data, and the liquid level flow meter 72 adjusts the flow rate to stabilize the pressure at 0.03MPa, ensuring that the tube is filled without air bubbles;

[0046] (2) Constant temperature circulation treatment: For the three circulating liquids that require constant temperature, the temperature sensor 71 monitors the temperature in real time. When the temperature deviates from the set value (e.g., 65℃), the control unit adjusts the heating power according to the PID algorithm to quickly stabilize the temperature within the range of 65±0.5℃ and perform continuous circulation treatment.

[0047] (3) Cleaning and drying: After the circulation process is completed, switch to cleaning fluid delivery. After cleaning, the solenoid valve is switched to the drying component 8, and air is continuously and stably introduced at 0.1MPa air pressure. Combined with the pipe tilt angle, the residual cleaning fluid is completely discharged. Then, air is blown continuously at 0.2MPa air pressure for 30s to ensure that the inner wall of the pipe is dry.

[0048] (4) Solution switching: When it is necessary to replace the circulating fluid, the control unit first closes the current passage solenoid valve, restarts the pre-charge negative pressure chamber to evacuate, and then opens the target storage container solenoid valve to inject new circulating fluid, repeating the above filling and processing process.

[0049] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A coating treatment apparatus characterized by comprising: include: Heating components, including a water bath and a heating device, are used to heat and maintain a constant temperature of liquids; A liquid storage assembly, including a first liquid storage container and a second liquid storage container, is used to store and quantitatively release liquid; The control components, including a drive pump, a switching valve, and a clamp valve, are used to switch the flow path and control the flow path.

2. The coating treatment equipment according to claim 1, characterized in that, The water bath is located on one side of the working platform, and multiple sets of first liquid storage containers are provided on one side of the water bath.

3. The coating treatment equipment according to claim 2, characterized in that, The first liquid storage container is connected to the second liquid storage container through multiple sets of flow lines, and each set of flow lines is equipped with a first peristaltic pump and a switching valve.

4. The coating treatment equipment according to claim 1, characterized in that, Multiple sets of the second liquid storage containers are arranged in the middle and on the other side of the working platform, and the second liquid storage containers are connected to the pipe to be processed through a flow pipeline.

5. The coating treatment equipment according to claim 4, characterized in that, The pipe to be processed is placed on the telescopic frame and is placed horizontally.

6. The coating treatment equipment according to claim 4, characterized in that, The second liquid storage container is connected to the pipe to be processed through multiple sets of flow pipelines, and each set of flow pipelines is equipped with a second peristaltic pump and a pipe clamp valve.

7. The coating treatment equipment according to claim 4, characterized in that, The end of the flow pipeline is equipped with a one-way check valve, and the flow pipeline is connected to the external gas line via a T-shaped flow path.

8. The coating treatment equipment according to claim 4, characterized in that, The connection part of the flow pipeline is inclined, and the inclination angle of the flow pipeline is 15-30°.

9. The coating treatment equipment according to claim 1, characterized in that, It also includes a monitoring component, which includes a temperature sensor, a liquid level flow meter, and a pressure sensor. The temperature sensor is located on one side of the heating device, the liquid level flow meter is located on one side of the second liquid storage container, and the pressure sensor is located on the flow pipeline.

10. The coating treatment equipment according to claim 1, characterized in that, It also includes a drying assembly, which includes an exhaust hood, a flow control chamber, and an exhaust fan. The flow control chamber is located at the bottom of the second liquid storage container, the exhaust hood is located on one side of the flow control chamber, and the exhaust fan is located on the other side of the flow control chamber.

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