A parylene coating storage device

Abstract

The utility model discloses a kind of Parylene coating storage devices, to solve the problems of poor sealing of existing device, stirring is easily contaminated, cleaning is not thorough and discharge residue. It includes storage barrel, sealing cover, pneumatic stirring device and cleaning device;Sealing cover is provided with boss and is connected with the storage barrel, and double sealing is formed by cooperating with sealing washer;Pneumatic stirring device contains gas supply ring pipe, tangent jet pipe and gas supply main pipe with purifier, realize contactless stirring;Cleaning device contains water spraying ring pipe and annular distribution high-pressure nozzle, realize all-round cleaning;Storage barrel is provided with exhaust pipe with one-way air valve, slope inner bottom surface and transparent observation window, and main support column and auxiliary support rod are arranged at bottom. The device guarantees coating purity and component uniformity, avoids cross contamination, improves operation stability, and adapts to the needs of high-end fields such as electronics and medical treatment.

Description

Technical Field

[0001] This utility model relates to the technical field of precision coating storage equipment, and in particular to a Parylene coating storage device. Background Technology

[0002] Parylene coatings are a class of polymeric coating materials based on parylene. The core component is parylene dimer (including N-type, C-type, and D-type). Some products contain modified composite additives such as metal oxides and fluorides. They typically exist in powder or vapor-phase precursor form and can form a uniform and dense protective film through vapor deposition. Due to their excellent insulation, biocompatibility, and corrosion resistance, they are widely used in high-end fields such as electronic components, medical implants, and precision aerospace parts. The purity and component uniformity during storage directly determine the performance stability of subsequent coatings.

[0003] However, existing Parylene paint storage devices have the following key technical defects: 1. Parylene dimer powder readily absorbs moisture and impurities from the air. Traditional storage devices have simple sealing structures, making it difficult to achieve high airtightness protection. This leads to a decrease in coating purity and subsequent problems such as pinholes and insufficient adhesion during vapor deposition, which in particular affects the biocompatibility of medical-grade Parylene. 2. Liquid modified Parylene precursors are prone to component stratification when stored at low temperatures or left to stand, while powdered dimers are inefficient to mix manually. Traditional mechanical stirring mechanisms are prone to vibration, which can cause powder agglomeration. Furthermore, direct contact between mechanical parts and coatings may cause contamination. 3. After the paint is used, Parylene material is easily left on the inner wall of the storage container. The existing cleaning methods are mostly manual scrubbing, which is difficult to completely remove the residual impurities, thus affecting the purity of the paint stored next time and causing cross-contamination. 4. During storage, stirring of the coating or temperature changes will generate trace amounts of gas. The lack of an effective pressure release channel can easily lead to the failure of the sealing structure. At the same time, the bottom surface of some storage devices is designed as a flat surface, which can lead to incomplete discharge of coating or cleaning fluid, and residual liquid can easily breed impurities. Utility Model Content

[0004] To address the shortcomings of the existing technologies, there is an urgent need to design a dedicated Parylene coating storage device that combines high airtightness, gentle non-contact stirring, efficient internal wall cleaning, and a reasonable pressure balance and discharge structure. This would solve problems such as insufficient purity protection, easy component stratification, and incomplete cleaning found in existing devices.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A Parylene coating storage device includes a storage tank, a pneumatic agitator, and a cleaning device. The top port of the storage tank is equipped with a sealing cap, the bottom surface of the storage tank is connected to a discharge pipe, the bottom side of the storage tank is connected to the pneumatic agitator, and the top side of the storage tank is connected to the cleaning device. Parylene coating is stored in the storage tank and agitated by the pneumatic agitator. The cleaning device is connected to an external cleaning system for cleaning the inner wall of the storage tank.

[0006] In a preferred embodiment, a protrusion is provided on the bottom surface of the sealing cap, which engages with the port of the storage tank; a sealing gasket is provided between the sealing cap and the top port of the storage tank to ensure the internal sealing of the storage tank.

[0007] In a preferred embodiment, the pneumatic stirring device includes an air supply ring pipe, an air jet pipe, and an air supply main pipe. The air supply ring pipe is located on the bottom outer wall of the storage tank. Multiple air jet pipes are connected between the air supply ring pipe and the storage tank. The air supply ring pipe is connected to the air supply main pipe, and the other end of the air supply main pipe is connected to an external air supply system.

[0008] In a preferred embodiment, the air outlet of the jet pipe is tangential to the inner wall of the storage tank, and multiple jet pipes are symmetrically distributed in a ring around the axis of the storage tank.

[0009] In a preferred embodiment, a gas supply valve is installed on the main gas supply pipe. The gas supply valve is an electronic valve and is connected to a remote control center via a signal. A purifier is also installed on the main gas supply pipe.

[0010] In a preferred embodiment, the cleaning device includes a main water supply pipe and a spray ring pipe. The spray ring pipe is located on the inner wall of the storage tank and is connected to the main water supply pipe. Multiple high-pressure nozzles are connected to the lower end face of the spray ring pipe.

[0011] In a preferred embodiment, high-pressure nozzles are symmetrically distributed in a ring around the axis of the storage tank, with their nozzles facing the inner wall of the storage tank; the other end of the main water supply pipe is connected to an external water supply system, and a water supply valve is installed on the main water supply pipe. The water supply valve is an electronic valve and is connected to a remote control center via a signal.

[0012] In a preferred embodiment, a transparent observation window is provided on the wall of the storage tank, and the observation window is located at a height between the pneumatic stirring device and the cleaning device.

[0013] In a preferred embodiment, the top side of the storage tank is connected to an exhaust pipe, and a one-way valve is installed on the exhaust pipe; the inner bottom surface of the storage tank has a sloping structure, and the lowest point of the sloping structure is connected to a discharge pipe, and a discharge valve is installed on the discharge pipe, wherein the discharge valve is an electronic valve.

[0014] In the preferred embodiment, a main support column is vertically installed on the bottom surface of the storage tank, and an auxiliary support rod is vertically installed on the bottom wall of the air supply ring pipe.

[0015] A Parylene paint storage device that includes the following advantages: 1. The sealing cap is engaged with the storage tank port by a bottom protrusion, and a sealing gasket is added to form a double seal, which greatly improves the airtightness of the storage tank and prevents moisture and impurities in the air from coming into contact with Parylene coating (especially the easily adsorbed dimer powder); the one-way valve of the exhaust pipe can release a small amount of gas in the tank in a directional manner, which not only prevents excessive pressure from damaging the seal, but also prevents external air from entering in reverse, further ensuring the purity of the coating and meeting the storage requirements of the electronics and medical fields. 2. Pneumatic stirring replaces traditional mechanical stirring or scrubbing devices. Gentle stirring is achieved by tangentially spraying air along the inner wall of the storage tank through annularly distributed jet pipes, forming a vortex airflow. This avoids the stratification of liquid Parylene precursors and the clumping of powdered dimers. Furthermore, there is no direct contact between mechanical parts or scrubbing devices and the material, eliminating cross-contamination caused by material residue on scrubbing devices. The electronically controlled air supply pipeline can precisely adjust the stirring intensity to meet the stirring requirements of different Parylene coating models. 3. The cleaning device uses a water spray ring pipe that fits against the tank wall and a ring of symmetrical high-pressure nozzles to achieve 360° cleaning of the inner wall of the storage tank without dead angles. With the help of airflow, residual materials are quickly removed. The water supply is controlled by an electronic valve and can be operated automatically. The transparent observation window on the tank wall makes it easy to check the cleaning progress in real time, ensuring thorough cleaning and eliminating the risk of impurities for the next storage of paint. 4. The bottom of the storage tank is designed with a slope to allow the paint or cleaning solution to be completely discharged along the slope, solving the problem of material residue on the flat bottom. The electronic valve controls the discharge and can be adapted to materials of different viscosities. At the same time, the main support at the bottom of the storage tank and the auxiliary support of the air supply ring pipe form a double stability structure to prevent the device from shaking during stirring and extend the service life of the equipment. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a bottom view of the overall structure of this utility model; Figure 3 This is a schematic diagram of the cleaning device and stirring device of this utility model; Figure 4 This is a schematic diagram of the internal rotation mechanism of the stirring device of this utility model.

[0017] In the diagram: Storage tank 1, observation window 101, sealing cover 2, boss 201, sealing gasket 202, pneumatic stirring device 3, air supply ring pipe 301, jet pipe 302, main air supply pipe 303, purifier 304, air supply valve 305, cleaning device 4, main water supply pipe 401, water supply valve 402, water spray ring pipe 403, high pressure nozzle 404, exhaust pipe 5, one-way air valve 501, main support column 6, auxiliary support rod 7, discharge pipe 8, discharge valve 801. Detailed Implementation

[0018] A Parylene coating storage device includes a storage tank 1, a pneumatic stirring device 3, and a cleaning device 4. The storage tank 1 is made of 304 stainless steel, which combines excellent corrosion resistance with a smooth surface, preventing chemical reactions with the Parylene coating (containing modified composite additives). Its volume is set to 50-200L according to actual usage requirements, and the tank wall thickness is 3-5mm to ensure structural strength. A detachable sealing cap 2 is installed at the top port of the storage tank 1. The sealing cap 2 is made of the same stainless steel as the storage tank 1, and the two are fixedly connected by 8-12 circumferentially distributed fastening bolts, ensuring sealing stability and facilitating subsequent maintenance. A discharge pipe 8 is vertically connected to the center of the bottom surface of the storage tank 1. The discharge pipe 8 is made of stainless steel and has an inner diameter of 20-50mm to accommodate the discharge requirements of Parylene coatings (powder or liquid precursors) of different viscosities. A pneumatic stirring device 3 is connected to the bottom side of the storage tank 1 near the tank wall to solve the problems of liquid precursor stratification and powder agglomeration. A cleaning device 4 is connected to the top side of the storage tank 1 10-15cm from the tank opening to achieve comprehensive cleaning according to the internal space structure. Parylene coatings are stored in the storage tank 1 and are gently stirred by the pneumatic stirring device 3 using purified compressed air to prevent the coatings from settling and stratifying. The cleaning device 4 is connected to an external high-pressure cleaning system to perform comprehensive cleaning of the inner wall of the storage tank 1 after the coatings are discharged to avoid cross-contamination.

[0019] Preferred solutions include Figure 2As shown, the bottom surface of the sealing cap 2 is integrally formed with a boss 201. The outer diameter of the boss 201 is adapted to the inner diameter of the port of the storage tank 1. The two adopt a clearance fit, and the fit clearance is controlled within 0.1-0.3mm. Radial positioning is achieved through the boss 201 to ensure precise contact of the sealing surface and to achieve precise snap-fit ​​between the boss 201 and the port of the storage tank 1. A sealing gasket 202 is provided between the sealing cap 2 and the top port of the storage tank 1. In view of the characteristic that Parylene dimer powder easily absorbs moisture and impurities, the sealing gasket... 202 is made of fluororubber material that is resistant to Parylene coating corrosion, with a thickness of 2-3mm. The outer diameter of the sealing gasket 202 is consistent with the outer diameter of the port of storage tank 1, and the inner diameter is adapted to the outer diameter of the boss 201. The pre-tightening force of the fastening bolts causes the sealing gasket 202 to undergo elastic deformation, forming a double sealing structure of "boss positioning + gasket sealing" to ensure the high airtightness of storage tank 1, block the contact between moisture and impurities in the air and the coating inside the tank, prevent the coating purity from decreasing, and solve the technical defects of simple sealing in traditional devices.

[0020] Preferred solutions include Figure 3 and Figure 4 As shown, the pneumatic stirring device 3 includes an air supply ring pipe 301, jet pipes 302, and an air supply main pipe 303. The air supply ring pipe 301 is made of stainless steel, and its diameter is 0.6-0.8 times the bottom diameter of the storage tank 1, enabling uniform airflow distribution. The pipe wall thickness is 2-4mm. The air supply ring pipe 301 is fixed to the bottom outer wall of the storage tank 1 by clamps, and the distance between it and the bottom of the storage tank 1 is 5-10cm to avoid corrosion from contact with the ground. Multiple jet pipes 302 are evenly connected between the air supply ring pipe 301 and the storage tank 1. The jet pipes 302 are made of stainless steel, with an inner diameter of 5-10mm and a length of 10-15cm. One end of each jet pipe is welded to the air supply ring pipe 301, and the other end penetrates the wall of the storage tank 1 and is sealed by welding to prevent paint leakage. A main air supply pipe 303 is connected tangentially to the air supply ring pipe 301. The main air supply pipe 303 has an inner diameter of 15-25mm and is made of stainless steel. Its other end is connected to an external air supply system via a flange. The external air supply system can be an air compressor. A sealing gasket is installed at the flange connection to ensure airtightness during the air supply process. This structure replaces traditional mechanical stirring, achieving non-contact stirring and fundamentally avoiding the problems of mechanical parts contaminating the coating and vibration causing powder agglomeration.

[0021] Preferred solutions include Figure 4As shown, the air outlet of the jet pipe 302 is tangentially positioned to the inner wall of the storage tank 1, and the outlets are uniformly arranged clockwise or counterclockwise along the tangent to the inner wall of the storage tank 1. This allows the ejected compressed air to drive the material inside the tank to form a rotating vortex flow field, achieving a gentle yet comprehensive stirring effect. Multiple jet pipes 302 are symmetrically distributed in a ring around the axis of the storage tank 1, with 4-8 jet pipes 302 in number. The central angle between any two adjacent jet pipes 302 is equal. This distribution ensures a uniform and stable vortex flow field, preventing the liquid Parylene precursor from stratifying and preventing the powdered dimer from agglomerating. At the same time, the gentle stirring intensity does not damage the stability of the coating components, solving the shortcomings of traditional manual shaking which is inefficient and mechanical stirring which is prone to contamination.

[0022] Preferred solutions include Figure 3 As shown, an air supply valve 305 is installed on the main air supply pipe 303 near the external air supply system. The air supply valve 305 is a solenoid directional valve, specifically a two-position five-way solenoid valve with a rated working pressure of 0.6-1.0 MPa. It is connected to the remote control center via a wire to achieve remote start / stop control. A purifier 304 is also installed on the main air supply pipe 303 between the air supply valve 305 and the air supply ring pipe 301. The purifier 304 adopts a three-stage filtration structure, sequentially removing water, oil, and dust from the compressed air. The filtration accuracy can reach 0.1 μm, preventing impurities from entering the storage tank 1 and contaminating the paint or clogging the jet pipe 302.

[0023] Preferred solutions include Figure 3 As shown, the cleaning device 4 includes a main water supply pipe 401 and a spray ring pipe 403. The spray ring pipe 403 is made of stainless steel and has a diameter 0.9-0.95 times the inner diameter of the storage tank 1. It is fixed to the top of the inner wall of the storage tank 1 by a bracket, at a distance of 15-20cm from the top of the storage tank 1. The spray ring pipe 403 is connected to the main water supply pipe 401 via a T-joint. The main water supply pipe 401 is made of stainless steel and has an inner diameter of 15-25mm. The part of the main water supply pipe 401 that penetrates the wall of the storage tank 1 is sealed by welding. Multiple high-pressure nozzles 404 are evenly connected to the lower end face of the spray ring pipe 403. The high-pressure nozzles 404 are fan-shaped atomizing nozzles with a spray angle of 60-90° and a working pressure of 0.3-0.5MPa.

[0024] Preferred solutions include Figure 3As shown, 6-12 high-pressure nozzles 404 are symmetrically distributed in a ring around the axis of the storage tank 1. The spray range of adjacent nozzles overlaps to ensure no cleaning dead spots. The nozzles face the inner wall of the storage tank 1 at an angle of 30-45° to enhance the cleaning impact. The other end of the water supply main pipe 401 is connected to an external water supply system via a flange. The external water supply system can be a high-pressure water pump. A water supply valve 402 is installed on the water supply main pipe 401 near the flange. The water supply valve 402 is an electromagnetic directional valve, the same model as the air supply valve 305, and is connected to the remote control center via a wire to achieve linkage control with the air supply valve 305.

[0025] Preferred solutions include Figure 3 As shown, a transparent observation window 101 is provided on the wall of the storage tank 1. The observation window 101 is made of impact-resistant and paint corrosion-resistant tempered glass or polycarbonate material with a thickness of 5-8mm and dimensions of 200-300mm in length and 100-150mm in width. The observation window 101 is fixed to the wall of the storage tank 1 by a flange, and a sealing gasket is provided between the flange and the tank wall. The observation window 101 is located at the height between the pneumatic stirring device 3 and the cleaning device 4, that is, at 1 / 3-2 / 3 of the height from the bottom of the storage tank 1, which facilitates the operator to observe the liquid level, stirring status and cleaning status of the paint in the tank. A protective metal mesh can also be installed on the outside of the observation window 101.

[0026] Preferred solutions include Figure 2 As shown, an exhaust pipe 5 is connected to the top side of the storage tank 1, 5-10 cm below the sealing cap 2. The exhaust pipe 5 is made of stainless steel with an inner diameter of 10-20 mm. A one-way valve 501 is installed on the exhaust pipe 5. The opening pressure of the one-way valve 501 is 0.01-0.02 MPa, allowing only the gas inside the tank to be discharged outwards, preventing outside air from entering the tank, and avoiding excessive pressure inside the tank during stirring. The inner bottom surface of the storage tank 1 has a sloping structure with a slope of 5-10°, ensuring that the coating can be smoothly collected at the lowest point. The lowest point of the sloping structure is connected to the discharge pipe 8. A discharge valve 801 is installed on the discharge pipe 8. The discharge valve 801 is an electric ball valve with a rated working pressure of 1.0-1.6 MPa, and is connected to a remote control center via a wire to realize remote discharge control.

[0027] Preferred solutions include Figure 2As shown, main support columns 6 are evenly and vertically arranged along the circumference of the bottom surface of the storage tank 1. The main support columns 6 are made of stainless steel, numbering 3-4, with an outer diameter of 30-50mm and a length of 300-500mm. Their tops are welded and fixed to the bottom of the storage tank 1, and anti-slip pads are provided at the bottom. Auxiliary support rods 7 are vertically arranged on the bottom wall of the air supply ring pipe 301 corresponding to the positions of the main support columns 6. The auxiliary support rods 7 are made of stainless steel, with an outer diameter of 20-30mm and a length consistent with the main support columns 6. Their tops are welded and fixed to the air supply ring pipe 301, and their bottoms are flush with the bottom of the main support columns 6 and are provided with anti-slip pads. Together, they improve the overall stability of the device and prevent tipping.

Claims

1. A Parylene coating storage device, comprising a storage tank (1), a pneumatic stirring device (3), and a cleaning device (4), characterized in that: A sealing cap (2) is provided at the top port of the storage tank (1), a discharge pipe (8) is connected to the bottom surface of the storage tank (1), a pneumatic stirring device (3) is connected to the bottom side of the storage tank (1), and a cleaning device (4) is connected to the top side of the storage tank (1). Parylene paint is stored in the storage tank (1) and stirred by the pneumatic stirring device (3). The cleaning device (4) is connected to an external cleaning system for cleaning the inner wall of the storage tank (1).

2. The Parylene coating storage device according to claim 1, characterized in that: The bottom surface of the sealing cover (2) is provided with a boss (201), which engages with the port of the storage tank (1); a sealing gasket (202) is provided between the sealing cover (2) and the top port of the storage tank (1) to ensure the internal sealing of the storage tank (1).

3. The Parylene coating storage device according to claim 1, characterized in that: The pneumatic stirring device (3) includes an air supply ring pipe (301), a jet pipe (302) and an air supply main pipe (303). The air supply ring pipe (301) is located on the bottom outer wall of the storage tank (1). Multiple jet pipes (302) are connected between the air supply ring pipe (301) and the storage tank (1). The air supply main pipe (303) is connected to the air supply ring pipe (301), and the other end of the air supply main pipe (303) is connected to an external air supply system.

4. The Parylene coating storage device according to claim 3, characterized in that: The outlet of the jet pipe (302) is tangential to the inner wall of the storage tank (1), and multiple jet pipes (302) are symmetrically distributed in a ring around the axis of the storage tank (1).

5. The Parylene coating storage device according to claim 3, characterized in that: A gas supply valve (305) is provided on the gas supply main pipe (303). The gas supply valve (305) is an electronic valve and is connected to the remote control center signal. A purifier (304) is also provided on the gas supply main pipe (303).

6. The Parylene coating storage device according to claim 1, characterized in that: The cleaning device (4) includes a water supply main pipe (401) and a water spray ring pipe (403). The water spray ring pipe (403) is located on the inner wall of the storage tank (1). The water spray ring pipe (403) is connected to the water supply main pipe (401). The lower end face of the water spray ring pipe (403) is connected to multiple high-pressure nozzles (404).

7. The Parylene coating storage device according to claim 6, characterized in that: High-pressure nozzles (404) are symmetrically distributed in a ring around the axis of the storage tank (1), with their nozzles facing the inner wall of the storage tank (1); the other end of the water supply main pipe (401) is connected to the external water supply system, and a water supply valve (402) is provided on the water supply main pipe (401). The water supply valve (402) is an electronic valve and is connected to the remote control center signal.

8. The Parylene coating storage device according to claim 6, characterized in that: A transparent observation window (101) is provided on the wall of the storage tank (1), and the observation window (101) is located at a height between the pneumatic stirring device (3) and the cleaning device (4).

9. The Parylene coating storage device according to claim 1, characterized in that: The top side of the storage tank (1) is connected to an exhaust pipe (5), and a one-way air valve (501) is provided on the exhaust pipe (5); the inner bottom surface of the storage tank (1) is a slope structure, and the lowest point of the slope structure is connected to the discharge pipe (8), and a discharge valve (801) is provided on the discharge pipe (8), which is an electronic valve.

10. The Parylene coating storage device according to claim 3, characterized in that: The bottom surface of the storage tank (1) is vertically provided with a main support column (6), and the bottom wall of the air supply ring pipe (301) is vertically provided with an auxiliary support rod (7).

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