Inner wall painting device and method for slender guide pipe type parts

Abstract

The invention provides an inner wall painting device and method for a long and thin guide pipe type part, and the device comprises a part clamping system which is used for clamping the two ends of the long and thin guide pipe type part; the paint blending and conveying system is used for automatically blending paint and automatically conveying the blended paint to the automatic painting and paint circulating system; the automatic painting and paint circulating system is connected with the paint blending and conveying system and the part clamping system; the automatic painting and paint circulation system is used for realizing painting and paint circulation on the inner walls of the slender guide pipe parts; and the waste gas collecting and treating system is connected with the automatic painting and paint circulating system, and the waste gas collecting and treating system is used for collecting waste gas in the painting process and treating the waste gas.

Description

Technical Field

[0001] The present application belongs to the technical field of inner wall painting in the manufacturing process of aircraft slender duct-like parts, and specifically relates to an inner wall painting device and method for slender duct-like parts. Background Art

[0002] In aircraft design and manufacturing, metal or composite slender tubular parts are widely used. In order to make the inner wall achieve functions such as lubrication, heat resistance or corrosion resistance, some slender tubular parts often require the inner wall to be coated with some functional paint. Such parts generally have a small inner diameter (inner diameter: 20mm~100mm) and a long tube length, generally 2m~4m.

[0003] In the traditional painting process, one method is the spraying process, which is to use a spray gun to spray paint in an atomized form onto the surface of the part under a certain pressure. This process can only be implemented on the exposed accessible surface. Since the paint is atomized and dispersed in the air during the spraying process, a large amount of paint evaporates, and only a small amount of paint reaches the surface of the part to achieve painting, which is a huge waste of paint. In addition, the spraying process is limited by the shape of the part and the size of the painting equipment, so that the paint nozzle cannot enter the interior of slender duct parts, and the inner wall of the slender duct parts cannot be painted.

[0004] Another process is dip painting, which mainly involves putting paint into a can or tank and immersing the parts below the paint liquid level so that a layer of paint is attached to the surface of the parts to achieve painting on the surface of the parts. Due to the long length of the conduit, the gas pressure in the conduit will hinder the entry of paint, so the traditional dip painting process cannot achieve the inner wall painting of slender conduit parts.

[0005] In order to meet the design functions of aircraft parts, realize the inner wall painting of slender duct parts, and reduce the waste of paint and air pollution. In view of the characteristics of slender duct parts and the actual production situation, it is urgent to develop an inner wall painting device for slender duct parts that is easy to operate, highly automated, and integrates pollutant collection and treatment, and provide a method that meets the painting requirements of such parts, so as to solve the problem that traditional spray painting technology cannot realize the inner wall painting of slender duct parts. Summary of the invention

[0006] Purpose of the invention: To provide a universal catheter part inner wall painting device which is easy to operate, highly automated, and integrates pollutant collection and treatment, and to provide a method for painting the inner walls of various catheter parts.

[0007] In a first aspect, the present application provides a device for painting the inner wall of a slender catheter-like part, the device comprising:

[0008] Parts clamping system, used to clamp both ends of slender catheter parts;

[0009] Paint mixing and conveying system, used to automatically mix paint and automatically convey the mixed paint to the automatic painting and paint circulation system;

[0010] An automated painting and paint circulation system is connected to the paint mixing and conveying system and the parts clamping system; the automated painting and paint circulation system is used to paint and circulate the paint on the inner wall of the elongated catheter-like parts;

[0011] The waste gas collection and treatment system is connected to the automatic painting and paint circulation system, and the waste gas collection and treatment system is used to collect the waste gas in the painting process and treat the waste gas.

[0012] Preferably, the parts clamping system comprises:

[0013] Cylinder;

[0014] A lower circular fixed clamping mechanism is arranged at the lower part of the cylinder body, and the lower circular fixed clamping mechanism is used to fix the lower end of the slender catheter-like parts;

[0015] The upper circular movable clamping mechanism is arranged at the upper part of the cylinder body, and the upper circular movable clamping mechanism is used to fix the upper end of the slender catheter-like parts.

[0016] Preferably, the lower circular fixed clamping mechanism is identical to the upper circular movable clamping mechanism.

[0017] Preferably, the lower circular fixed clamping mechanism comprises:

[0018] A flat plate, arranged at the lower part of the cylinder;

[0019] A small circular hole is provided on the flat plate;

[0020] A rubber ring is installed in the small circular hole to form a clamping hole; the clamping hole is used to fix the lower end of the elongated catheter-like part;

[0021] A lower paint circulation hole is provided on the flat plate, and the lower paint circulation hole is communicated with the small circular hole;

[0022] Among them, the inner diameter of the small circular hole is larger than the inner diameter of the lower paint circulation hole, and the inner diameter of the slender catheter-like part is equal to the inner diameter of the lower paint circulation hole.

[0023] Preferably, the lower circular fixed clamping mechanism further comprises:

[0024] The lower inclined plate of the cylinder is obliquely arranged at the lower part of the cylinder, and the lower inclined plate of the cylinder is located below the flat plate, and a cavity is formed between the lower inclined plate of the cylinder and the flat plate.

[0025] Preferably, the cylinder comprises:

[0026] The upper cover has an air inlet and an air outlet; wherein the exhaust gas collection and treatment system is connected to the air outlet.

[0027] Preferably, the cylinder further comprises:

[0028] A paint inlet is arranged at the lower part of the side wall of the cylinder; wherein the paint enters the cavity from the paint inlet;

[0029] A paint discharge port is provided at the lower part of the side wall of the cylinder; wherein the paint in the cavity flows out through the paint discharge port;

[0030] The paint reflux port is arranged at the upper part of the side wall of the cylinder; wherein the paint in the cylinder refluxes through the paint reflux port.

[0031] In a second aspect, the present application also provides a method for painting the inner wall of a slender catheter-like part, the method comprising:

[0032] Open the air valve, exhaust gas treatment device, and exhaust fan;

[0033] Turn on the paint stirrer;

[0034] Start the base material circulation delivery pump, diluent circulation delivery pump and curing agent circulation delivery pump to automatically deliver the base material, diluent and curing agent in the base material cylinder, diluent cylinder and curing agent cylinder to the paint mixing cylinder according to the required proportion. The three components of base material, diluent and curing agent are fully mixed under the action of the paint agitator to prepare the paint used in production;

[0035] Open the paint return control valve;

[0036] Turn on the paint delivery pump and deliver the prepared paint from the paint mixing cylinder to the lower cavity of the cylinder through the paint delivery pump. As the delivery time increases, the liquid level of the paint continues to rise, so that the paint fills the lower cavity of the cylinder through the paint flow hole below the lower circular fixed clamping mechanism, the inside of the conduit and the upper paint flow hole channel of the upper circular movable clamping mechanism. Relying on the pressure, the paint reaches the upper cavity of the cylinder. When the paint liquid level reaches the paint discharge port of the upper cavity, the paint will automatically flow back to the paint mixing cylinder along the pipeline through the paint reflux control valve, forming a paint circulation channel. In this process, under the pressure of the paint on the inner wall of the conduit, the paint is deposited on the inner wall of the conduit to complete the painting of the inner wall of the conduit.

[0037] Preferably, before opening the air valve, the exhaust gas treatment device, and the exhaust fan, the method further includes:

[0038] Remove the upper circular movable clamping mechanism;

[0039] Insert one end of the slender catheter-like parts into the clamping hole with a rubber ring of the lower circular fixed clamping mechanism, and make all parts in a vertical state;

[0040] Insert one end of the slender catheter-like part into the clamping hole with a rubber ring of the lower circular fixed clamping mechanism, adjust the state of the part and the upper circular movable clamping mechanism, so that the other end of the part is inserted into the clamping hole with a rubber ring of the upper circular movable clamping mechanism, press the upper circular movable clamping mechanism so that it is tightly combined with the circular ribs on the upper part of the cylinder to achieve a sealing effect, and complete the part clamping work.

[0041] Preferably, the method further comprises:

[0042] When the spraying time is reached, open the paint drain valve and close the paint reflux control valve to allow the paint to flow back to the paint mixing cylinder along the paint drain pipe at the bottom of the cylinder, completing the paint recovery work;

[0043] The exhaust fan is always turned on during the painting process to accelerate the drying and curing speed of the parts and complete the drying and curing of the paint-removed parts;

[0044] Lift and remove the upper circular movable clamping mechanism;

[0045] Pull the parts out of the circular movable clamping mechanism and conduct inspection.

[0046] This application has the following technical effects:

[0047] The device integrates the functions of automatic paint mixing, parts painting, waste gas collection and treatment, integrates the functions of the three sets of equipment in the traditional sense, greatly reduces the equipment investment cost, and the floor space occupied by the device is smaller than that of traditional equipment; the device completes the inner wall painting process of slender duct parts through the pressurized supply of the paint supply pump and the circulation of paint on the inner wall of the duct parts, perfectly solving the problem that traditional equipment cannot paint; it realizes automatic and precise paint mixing, uses a curing agent, base material and diluent circulation device, and perfectly solves the deposition failure phenomenon of the curing agent, base material and diluent, providing High accuracy and precision of paint ratio, reducing the number of pipeline cleaning times and paint waste, reducing pollutant emissions, and realizing green production; realizing the recycling of paint, after multiple cycles, almost all of the paint is eventually used for painting the inner wall of the catheter parts, compared with the traditional painting process, the paint utilization rate has increased exponentially, greatly reducing paint waste, reducing costs, and reducing pollutant emissions; realizing accurate collection and treatment of waste gas throughout the production process, meeting environmental emission requirements; meeting the overall requirements of the country's green manufacturing and clean production, ensuring the quality of parts painting, and having wide versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 Typical parts diagram for interior wall painting;

[0049] Figure 2 Figure 1: An integrated automatic device for painting the inner wall of slender duct parts;

[0050] Figure 3 The inner wall of slender duct parts is painted;

[0051] Figure 4 Diagram of the parts clamping system of the integrated automatic device for inner wall painting of slender duct parts;

[0052] Figure 5 Paint mixing and circulation diagram of the integrated automatic device for inner wall painting of slender duct parts;

[0053] Figure 6 Exhaust gas collection and treatment diagram of the integrated automatic device for painting the inner wall of slender duct parts;

[0054] Figure 7 Structural diagram of the lower circular fixed clamping mechanism;

[0055] Among them: 1-equipment support platform, 2-cylinder, 3-cylinder lower inclined plate, 4-lower circular fixed clamping mechanism, 5-lower paint flow hole, 6-paint emptying valve, 7-paint agitator, 8-paint mixing cylinder, 9-base material delivery control valve, 10-base material cylinder, 11-diluent delivery control valve, 12-diluent cylinder, 13-curing agent delivery control valve, 14-curing agent cylinder, 15-curing agent circulation delivery pump, 16-curing agent flow meter, 17-diluent circulation delivery pump, 18-diluent flow meter, 19-base material circulation delivery pump, 20-base material flow meter, 21-paint delivery pump, 22-paint control valve, 23-paint reflux control valve, 24-air inlet, 25-air collecting hood, 26-upper circular movable clamping mechanism, 27-rubber ring, 28-typical parts, 29-air valve, 30-exhaust cylinder, 31-exhaust gas treatment device, 32-exhaust fan, 33-small round hole. DETAILED DESCRIPTION

[0056] The present application solves the problem that the inner wall of slender duct parts cannot be painted due to the small aperture of the pipe; provides a device and method for automatically painting the inner wall of slender duct parts; changes the state of traditional single-piece painting, realizes batch production of multiple parts, and improves painting efficiency; provides a device and method for automatically mixing paint according to demand, reduces the waste of paint, realizes the circulation of base material, curing agent and diluent, and avoids the short-term failure of base material, curing agent and diluent; provides an automatic paint stirring device to avoid the problem of paint failure due to paint deposition; gets rid of the problem of unorganized emission of waste gas from traditional solution paint removal and inability to collect and treat.

[0057] Provided is an integrated automatic device for inner wall painting of slender duct parts, which is mainly composed of a parts clamping system, a paint mixing and conveying system, an automatic painting and paint circulation system, and an exhaust gas collection and treatment system; it mainly includes: an equipment support platform 1, a cylinder 2, a lower inclined plate of the cylinder 3, a lower circular fixed clamping mechanism 4, a lower paint flow hole 5, a paint emptying valve 6, a paint agitator 7, a paint mixing cylinder 8, a base material conveying control valve 9, a base material cylinder 10, a diluent conveying control valve 11, a diluent cylinder 1 2. Curing agent delivery control valve 13, curing agent cylinder 14, curing agent circulation delivery pump 15, curing agent flow meter 16, diluent circulation delivery pump 17, diluent flow meter 18, base material circulation delivery pump 19, base material flow meter 20, paint delivery pump 21, paint control valve 22, paint reflux control valve 23, air inlet 24, air collecting hood 25, upper circular movable clamping mechanism 26, rubber ring 27, typical parts 28, air valve 29, exhaust pipe 30, exhaust gas treatment device 31, exhaust fan 32 and other components.

[0058] The parts clamping system is mainly used to fix and clamp the parts to be painted. Insert one end of the slender catheter-like parts into the clamping hole with a rubber ring of the lower circular fixed clamping mechanism, adjust the upper circular movable clamping mechanism, so that the other end of the part is inserted into the clamping hole with a rubber ring of the upper circular movable clamping mechanism, and press and fix it, so that the lower paint flow hole, the catheter and the upper paint flow hole form a complete paint flow passage. The paint mixing and delivery system is mainly used for the automatic configuration and delivery of paint. The base material, curing agent and diluent are delivered to the paint mixing cylinder through the paint pump according to the paint ratio requirements, and are mixed evenly by the paint agitator to prepare the paint for painting. The automatic painting and paint circulation system is mainly used for painting the inner wall of parts and recycling paint. The prepared paint is transported to the lower cavity of the cylinder through the paint delivery pump and pipeline. As the volume of the paint continues to increase, the paint will flow back to the paint cylinder along the lower paint flow hole, the inner wall of the slender conduit, the upper paint flow hole and the upper paint return pipeline to complete the circulation of the paint. In this process, due to the pressure formed by the paint and the inner wall of the conduit parts, the inner wall of the conduit parts completes the painting process. The exhaust gas collection and treatment system is mainly used to collect and purify the exhaust gas generated during the painting process, achieve standard emission, and accelerate the curing of the paint layer. At the same time, the paint mixing and conveying system needs to be connected with the automatic painting and paint circulation system to provide the device with available paint and allow the paint to circulate to form a circulation system; the automatic painting and paint circulation system needs to be connected with the parts clamping system to allow the paint to flow through the inside of the clamped conduit parts, thereby achieving painting of the inner walls of the parts; the automatic painting and paint circulation system is connected with the exhaust gas collection and treatment system to centrally collect and uniformly treat the exhaust gas generated during the painting process to achieve standard emissions.

[0059] The parts clamping system includes: an equipment support platform 1, a cylinder 2, a lower inclined plate 3 of the cylinder, a lower circular fixed clamping mechanism 4, a lower paint flow hole 5, an upper circular movable clamping mechanism 26, and a rubber ring 27. The equipment support platform 1 is mainly used to place the cylinder 2, and the lower inclined plate 3 of the cylinder is welded on the lower layer of the cylinder 2 at an angle toward the paint discharge side, and its sealing is ensured; the lower circular fixed clamping mechanism 4 is welded to the lower half of the cylinder 2, and its sealing is ensured, so that the lower inclined plate 3 of the cylinder, the cylinder 2 and the lower circular fixed clamping mechanism 4 form a cavity; the internal small part in ... the lower circular fixed clamping mechanism 4 is welded to the lower half of the cylinder 2, and the lower circular fixed clamping mechanism 4 is welded to the lower half of the cylinder 2, and the lower circular fixed clamping mechanism 4 is welded to the lower half of the cylinder 2, and the lower circular fixed clamping mechanism 4 is welded to the lower half of the cylinder 2, and the lower circular fixed clamping mechanism 4 is welded to the lower half of the cylinder 2, and the lower circular fixed clamping mechanism 4 is welded to the lower A rubber ring 27 is pressed into the circular hole, and one end of the typical part 28 is inserted into the clamping hole with a rubber ring of the lower circular fixed clamping mechanism, so that the lower metal part of the small circular hole of the lower circular fixed clamping mechanism 4 is approximately consistent with the diameter of the conduit hole, forming a paint flow passage; a rubber ring is pressed into the internal small circular hole of the upper circular movable clamping mechanism 26, and a sealing ring is covered on the outer circumference, and the other end of the typical part 28 is inserted into the clamping hole with a rubber ring of the upper circular movable clamping mechanism, and the state is adjusted and pressed so that it is tightly combined with the circular ribs on the upper part of the cylinder body to achieve a sealing effect and form a paint flow passage.

[0060] The paint mixing and delivery system includes: a paint agitator 7, a paint mixing cylinder 8, a base material delivery control valve 9, a base material cylinder 10, a diluent delivery control valve 11, a diluent cylinder 12, a curing agent delivery control valve 13, a curing agent cylinder 14, a curing agent circulation delivery pump 15, a curing agent flow meter 16, a diluent circulation delivery pump 17, a diluent flow meter 18, a base material circulation delivery pump 19, and a base material flow meter 20. The paint mixing cylinder 8 is provided, and the paint agitator 7 is provided in the paint mixing cylinder; the base material in the base material cylinder 10 is passed through a pipeline and, in cooperation with the base material flow meter 20 and the base material delivery control valve 9, the base material circulation delivery pump 15 is used to deliver the base material to the base material cylinder 10; The delivery pump 19 delivers the base material to the paint mixing cylinder 8 in the required amount according to the proportion; the diluent cylinder 12 is delivered to the paint mixing cylinder 8 in the required amount according to the proportion through a pipeline with the cooperation of the diluent flowmeter 18 and the diluent delivery control valve 11, using the diluent circulation delivery pump 17; the curing agent cylinder 14 is delivered to the paint mixing cylinder 8 in the required amount according to the proportion through a pipeline with the cooperation of the curing agent flowmeter 16 and the curing agent delivery control valve 13, using the curing agent circulation delivery pump 15; the three components of the base material, the diluent and the curing agent are fully mixed under the action of the paint agitator 7 to prepare the paint used for production.

[0061] The automatic painting and paint circulation system includes: a paint drain valve 6, a paint delivery pump 21, a paint control valve 22, a paint reflux control valve 23, and an air inlet 24. The prepared paint is delivered from the paint mixing cylinder 8 to the lower cavity of the cylinder through the paint delivery pump 21. As the delivery time increases, the liquid level of the paint continues to rise, so that the paint fills the lower cavity of the cylinder through the paint flow hole below the lower circular fixed clamping mechanism, the inside of the conduit, and the upper paint flow hole channel of the upper circular movable clamping mechanism 26. The paint reaches the upper cavity of the cylinder by pressure. When the paint liquid level reaches the paint discharge port of the upper cavity, the paint will automatically flow back to the paint mixing cylinder along the pipeline to form a paint circulation channel. In this process, under the pressure of the paint on the inner wall of the conduit, the paint is deposited on the inner wall of the conduit to complete the painting of the inner wall of the conduit. When painting is completed, the paint delivery pump 21 is closed to stop the paint delivery; the valve of the paint emptying valve 6 is opened, and the valve of the paint reflux control valve 23 is closed, so that the paint flows back to the paint mixing cylinder along the paint emptying pipe at the bottom of the cylinder, completing the paint recovery work. In this process, the volatilization of the paint in the air is reduced, the use of the paint is reduced, and the emission of pollutants is reduced.

[0062] The exhaust gas collection and treatment system includes: an air collecting hood 25, an air valve 29, an exhaust cylinder 30, an exhaust gas treatment device 31, and an exhaust fan 32. During the painting process, the exhaust gas is collected through the air collecting hood 25 arranged on the top of the cylinder. The air collecting hood 25 is connected to the air valve 29 and the exhaust fan 32 through an exhaust duct, which accelerates the gas circulation of the system and speeds up the curing and drying speed of the paint layer. Under the action of the exhaust fan 32, the collected exhaust gas is pumped to the exhaust gas treatment device 31 for exhaust gas treatment, and the treated exhaust gas meets the emission standards.

[0063] First, a steel equipment support platform 1 is manufactured, a steel cylinder 2 is arranged on the equipment support platform 1, and a lower inclined plate 3 of the cylinder is welded at an angle to the side of the lower layer of the cylinder 2 where the paint is discharged, and its sealing is ensured; the lower circular fixed clamping mechanism 4 is welded to the lower half of the cylinder 2, and its sealing is ensured, so that the lower inclined plate 3 of the cylinder, the cylinder 2 and the lower circular fixed clamping mechanism 4 form a cavity; the circular ribs on the upper part of the cylinder 3 are used to weld the inner small circular ribs of the upper circular movable clamping mechanism 26; The rubber ring is pressed into the hole, and the sealing ring is covered on the outer circumference to tighten it. One end of the slender catheter-like parts is inserted into the clamping hole with the rubber ring of the lower circular fixed clamping mechanism, and the state of the parts and the upper circular movable clamping mechanism 26 is adjusted so that the other end of the parts is inserted into the clamping hole with the rubber ring of the upper circular movable clamping mechanism. The upper circular movable clamping mechanism 26 is pressed so that it is tightly combined with the circular ribs on the upper part of the cylinder body to achieve a sealing effect, complete the parts clamping work, and form a paint flow passage.

[0064] Then, it is necessary to set up a paint mixing cylinder 8 as a paint mixing and containing container, and install a paint stirrer 7 on the upper part of the paint mixing cylinder, so that the stirring blades of the paint stirrer are arranged inside the paint mixing cylinder to achieve paint stirring, which is used for paint mixing and placing the paint to stand and solidify; at the same time, in order to provide the paint mixing cylinder with base material, diluent and curing agent, a base material cylinder 10, a diluent cylinder 12, and a curing agent cylinder 14 are set, and a base material circulation delivery pump 19, a diluent circulation delivery pump 17, a curing agent circulation delivery pump 15 and corresponding flow meters and pipelines are respectively set; use The base material circulation delivery pump 19 delivers the base material to the paint mixing cylinder according to the required ratio; the diluent in the diluent cylinder 12 is delivered to the paint mixing cylinder according to the required ratio through a pipeline with the cooperation of a metering pump, and the diluent circulation delivery pump 17 is used to deliver the diluent to the paint mixing cylinder according to the required ratio; the curing agent in the curing agent cylinder 14 is delivered to the paint mixing cylinder according to the required ratio through a pipeline with the cooperation of a metering pump, and the curing agent circulation delivery pump 15 is used to deliver the curing agent to the paint mixing cylinder according to the required ratio; the three components of the base material, the diluent and the curing agent are fully mixed under the action of the paint agitator 7 to prepare the paint used for production. A pipeline and a paint delivery pump 21 are arranged at the lower layer of the lower cavity of the cylinder 2, and an air inlet 24 is arranged at the top of the upper cavity of the cylinder 2 to ensure that the internal and external pressures are equal and the paint flows smoothly. A pipeline and a paint reflux control valve 23 are arranged at the upper layer of the upper cavity of the cylinder 2, and the paint reflux control valve 23 is opened; the prepared paint is delivered from the paint mixing cylinder to the lower cavity of the cylinder through the paint delivery pump 21. As the delivery time increases, the liquid level of the paint continues to rise, so that the paint fills the cylinder. The lower cavity is passed through the paint flow hole of the lower circular fixed clamping mechanism, the inside of the conduit and the upper paint flow hole channel of the upper circular movable clamping mechanism 26, and the paint reaches the upper cavity of the cylinder by pressure. When the paint liquid level reaches the paint discharge port of the upper cavity, the paint will automatically flow back to the paint mixing cylinder through the paint reflux control valve 23 along the pipeline to form a circulation channel for the paint. In this process, under the pressure of the paint on the inner wall of the conduit, the paint is deposited on the inner wall of the conduit to complete the painting of the inner wall of the conduit. A pipeline and a paint emptying valve 6 are set at the upper position of the lower cavity of the cylinder 2. When the painting is completed, the paint delivery pump 21 is closed to stop the paint delivery; the valve of the paint emptying valve 6 is opened, and the valve of the paint reflux control valve 23 is closed, so that the paint flows back to the paint mixing cylinder along the paint emptying pipe at the lower part of the cylinder to complete the paint recovery work. In this process, the volatilization of paint in the air is reduced, the use of paint is reduced, and the emission of pollutants is reduced.

[0065] Finally, a wind collecting hood 25 is arranged on the top of the cylinder. The exhaust gas collecting hood is connected to the exhaust fan 32, the exhaust gas treatment device 31, and the exhaust duct 30 through a pipeline, and a wind valve is arranged for control. The exhaust gas generated during the painting process is collected through the exhaust gas collecting hood, and under the action of the exhaust fan 32 and the control of the wind valve 29, the exhaust gas is discharged to the exhaust gas treatment device 31 for exhaust gas treatment, and the treated exhaust gas meets the emission standards; at the same time, due to the increase in air flow speed, the curing and drying speed of the paint layer is accelerated.

[0066] In the present technical scheme, the working principle of the integrated automatic device for inner wall painting of slender duct-like parts is as follows: the parts clamping system, the paint mixing and conveying system, the automatic painting and paint circulation system, and the exhaust gas collection and treatment system are integrated; a steel equipment support platform is set up, and a cylinder is placed on the equipment support platform. A lower inclined plate is welded on the lower layer of the cylinder on the side where the paint is discharged, and sealed so that the paint can be automatically discharged; one end of the slender duct-like part is inserted into the clamping hole with a rubber ring of the lower circular fixed clamping mechanism, and the state of the part and the upper circular movable clamping mechanism is adjusted so that the other end of the part is inserted into the clamping hole with a rubber ring of the upper circular movable clamping mechanism, and the upper circular movable clamping mechanism is pressed so that it is tightly combined with the circular ribs on the upper part of the cylinder body to achieve a sealing effect, complete the parts clamping work, and form a paint flow passage. The base material, diluent and curing agent in the base material cylinder, diluent cylinder and curing agent cylinder are respectively conveyed to the paint mixing cylinder according to the required proportion through the base material circulation delivery pump, diluent circulation delivery pump, curing agent circulation delivery pump and the corresponding flow meters and pipelines. The three components of base material, diluent and curing agent are fully mixed under the action of the paint agitator to prepare the paint used in production. The prepared paint is transported from the paint mixing cylinder to the lower cavity of the cylinder through the paint delivery pump. As the delivery time increases, the liquid level of the paint continues to rise, so that the paint fills the lower cavity of the cylinder through the lower paint flow hole of the lower circular fixed clamping mechanism, the inside of the conduit and the upper paint flow hole channel of the upper circular movable clamping mechanism. Relying on the pressure, the paint reaches the upper cavity of the cylinder. When the paint liquid level reaches the paint discharge port of the upper cavity, the paint will automatically flow back to the paint mixing cylinder along the pipeline through the paint reflux control valve to form a paint circulation channel. In this process, under the pressure of the paint on the inner wall of the conduit, the paint is deposited on the inner wall of the conduit to complete the painting of the inner wall of the conduit. When the painting is completed, the paint delivery pump is turned off to stop the paint delivery; the valve of the paint emptying valve is opened, and the valve of the paint reflux control valve is closed to make the paint flow back to the paint mixing cylinder along the paint emptying pipe at the bottom of the cylinder to complete the paint recovery work. The waste gas generated during the painting process is collected through the waste gas collection hood, and discharged to the waste gas treatment device for waste gas treatment under the action of the exhaust fan and the control of the air valve. The treated waste gas meets the emission standards; at the same time, due to the increase in air flow speed, the curing and drying speed of the paint layer is accelerated. In this process, the paint is automatically mixed and recycled, which is not only efficient, but also reduces the volatilization of the paint, improves the utilization rate of the paint, and reduces the emission of pollutants to ensure product quality.

[0067] (1) The integrated automatic painting device can perfectly integrate the functions of automatic paint mixing, parts painting, exhaust gas collection and treatment, and replace the functions of the three sets of equipment in the traditional sense with this device, greatly reducing the equipment investment cost. The floor space occupied by this device is smaller than that of traditional equipment;

[0068] (2) The device adopts automatic operation, making the operation more convenient; the integrated automatic catheter part inner wall painting device is supplied by the paint supply pump under pressure, so that when the paint flows in the catheter, the paint contacts the tube wall and is coated with a layer of paint on the tube wall under the action of fluid pressure, thereby completing the inner wall painting of the catheter;

[0069] (3) The device is equipped with an automatic paint delivery system, which forms three independent circulation systems for the paint's curing agent, base material and diluent, and automatically supplies them to the paint channel in a certain proportion. When no addition is needed, the three independent circulation systems are always circulating internally, which will prevent the curing agent, base material and diluent in the circulation pipeline from being deposited and ineffective; improve the accuracy and precision of the paint ratio, reduce the number of pipeline cleaning times and the waste of paint, reduce the emission of pollutants, and achieve green production;

[0070] (4) The mixed paint of the device is recycled. After multiple cycles, almost all of the paint is eventually used to paint the inner wall of the catheter parts. Compared with the traditional spray painting process, the paint utilization rate has increased exponentially, greatly reducing the waste of paint, reducing costs, and reducing pollutant emissions.

[0071] (5) The device is relatively closed, which is more conducive to the precise collection of exhaust gas than the traditional one, and is equipped with an exhaust gas treatment device to achieve standard emission of pollutants.

[0072] The method and steps for using the device to paint the inner wall of slender duct parts are as follows:

[0073] Step 1: Remove the upper circular movable clamping mechanism 26;

[0074] Step 2: Insert one end of the slender catheter-like part into the clamping hole with a rubber ring of the lower circular fixed clamping mechanism, and make all parts in a vertical state;

[0075] Step 3: Insert one end of the slender catheter-like part into the clamping hole with a rubber ring of the lower circular fixed clamping mechanism, adjust the state of the part and the upper circular movable clamping mechanism 26, so that the other end of the part is inserted into the clamping hole with a rubber ring of the upper circular movable clamping mechanism, and press the upper circular movable clamping mechanism 26 to make it tightly combined with the circular ribs on the upper part of the cylinder to achieve a sealing effect, and complete the part clamping work;

[0076] Step 4: Open the air valve 29, the exhaust gas treatment device 31, and the exhaust fan 32;

[0077] Step 5: Turn on the paint stirrer 7;

[0078] Step 6: Start the base material circulation delivery pump 19, the diluent circulation delivery pump 17, and the curing agent circulation delivery pump 15, and automatically deliver the base material, diluent, and curing agent in the base material cylinder 10, the diluent cylinder 12, and the curing agent cylinder 14 to the paint mixing cylinder according to the required proportion. The three components of the base material, the diluent, and the curing agent are fully mixed under the action of the paint agitator to prepare the paint used for production;

[0079] Step 7: Open the paint return control valve 23;

[0080] Step 8: Turn on the paint delivery pump 21, and deliver the prepared paint from the paint mixing cylinder to the lower cavity of the cylinder through the paint delivery pump. As the delivery time increases, the liquid level of the paint continues to rise, so that the paint fills the lower cavity of the cylinder through the lower paint flow hole of the lower circular fixed clamping mechanism, the inside of the conduit and the upper paint flow hole channel of the upper circular movable clamping mechanism. Relying on the pressure, the paint reaches the upper cavity of the cylinder. When the paint liquid level reaches the paint discharge port of the upper cavity, the paint will automatically flow back to the paint mixing cylinder along the pipeline through the paint reflux control valve to form a circulation channel for the paint. In this process, under the pressure of the paint on the inner wall of the conduit, the paint is deposited on the inner wall of the conduit, completing the painting work on the inner wall of the conduit;

[0081] Step 9: When the spraying time is reached, open the paint drain valve 6 and close the valve of the paint reflux control valve 23, so that the paint flows back to the paint mixing cylinder along the paint drain pipe at the bottom of the cylinder, completing the paint recovery work;

[0082] Step 10: During the painting process of the parts, the exhaust fan 32 is kept turned on to accelerate the drying and curing speed of the parts and complete the drying and curing work of the paint-removed parts.

[0083] Step 11: Lift and remove the upper circular movable clamping mechanism 26;

[0084] Step 12: Pull the parts out of the circular movable clamping mechanism and conduct inspection.

Claims

1. A device for painting the inner wall of a slender catheter-like part, characterized in that: The device comprises: Parts clamping system, used to clamp both ends of slender catheter parts; Paint mixing and conveying system, used to automatically mix paint and automatically convey the mixed paint to the automatic painting and paint circulation system; An automated painting and paint circulation system is connected to the paint mixing and conveying system and the parts clamping system; the automated painting and paint circulation system is used to paint and circulate the paint on the inner wall of the elongated catheter-like parts; The waste gas collection and treatment system is connected to the automatic painting and paint circulation system, and the waste gas collection and treatment system is used to collect the waste gas in the painting process and treat the waste gas.

2. The device according to claim 1, characterized in that The parts clamping system comprises: Cylinder; A lower circular fixed clamping mechanism is arranged at the lower part of the cylinder body, and the lower circular fixed clamping mechanism is used to fix the lower end of the slender catheter-like parts; The upper circular movable clamping mechanism is arranged at the upper part of the cylinder body, and the upper circular movable clamping mechanism is used to fix the upper end of the slender catheter-like parts.

3. The device according to claim 2, characterized in that The lower circular fixed clamping mechanism is identical to the upper circular movable clamping mechanism.

4. The device according to claim 3, characterized in that The lower circular fixed clamping mechanism comprises: A flat plate, arranged at the lower part of the cylinder; A small circular hole is provided on the flat plate; A rubber ring is installed in the small circular hole to form a clamping hole; the clamping hole is used to fix the lower end of the elongated catheter-like part; A lower paint circulation hole is provided on the flat plate, and the lower paint circulation hole is communicated with the small circular hole; Among them, the inner diameter of the small circular hole is larger than the inner diameter of the lower paint circulation hole, and the inner diameter of the slender catheter-like part is equal to the inner diameter of the lower paint circulation hole.

5. The device according to claim 4, characterized in that The lower circular fixed clamping mechanism also includes: The lower inclined plate of the cylinder is obliquely arranged at the lower part of the cylinder, and the lower inclined plate of the cylinder is located below the flat plate, and a cavity is formed between the lower inclined plate of the cylinder and the flat plate.

6. The device according to claim 5, characterized in that The cylinder comprises: The upper cover has an air inlet and an air outlet; wherein the exhaust gas collection and treatment system is connected to the air outlet.

7. The device according to claim 6, characterized in that The cylinder also includes: A paint inlet is arranged at the lower part of the side wall of the cylinder; wherein the paint enters the cavity from the paint inlet; A paint discharge port is provided at the lower part of the side wall of the cylinder; wherein the paint in the cavity flows out through the paint discharge port; The paint reflux port is arranged at the upper part of the side wall of the cylinder; wherein the paint in the cylinder refluxes through the paint reflux port.

8. A method for painting the inner wall of a slender catheter-like part, characterized in that: The method comprises: Open the air valve, exhaust gas treatment device, and exhaust fan; Turn on the paint stirrer; Start the base material circulation delivery pump, diluent circulation delivery pump and curing agent circulation delivery pump to automatically deliver the base material, diluent and curing agent in the base material cylinder, diluent cylinder and curing agent cylinder to the paint mixing cylinder according to the required proportion. The three components of base material, diluent and curing agent are fully mixed under the action of the paint agitator to prepare the paint used in production; Open the paint return control valve; Turn on the paint delivery pump and deliver the prepared paint from the paint mixing cylinder to the lower cavity of the cylinder through the paint delivery pump. As the delivery time increases, the liquid level of the paint continues to rise, so that the paint fills the lower cavity of the cylinder through the paint flow hole below the lower circular fixed clamping mechanism, the inside of the conduit and the upper paint flow hole channel of the upper circular movable clamping mechanism. Relying on the pressure, the paint reaches the upper cavity of the cylinder. When the paint liquid level reaches the paint discharge port of the upper cavity, the paint will automatically flow back to the paint mixing cylinder along the pipeline through the paint reflux control valve, forming a paint circulation channel. In this process, under the pressure of the paint on the inner wall of the conduit, the paint is deposited on the inner wall of the conduit to complete the painting of the inner wall of the conduit.

9. The method according to claim 8, characterized in that Before opening the air valve, the exhaust gas treatment device, and the exhaust fan, the method further includes: Remove the upper circular movable clamping mechanism; Insert one end of the slender catheter-like parts into the clamping hole with a rubber ring of the lower circular fixed clamping mechanism, and make all parts in a vertical state; Insert one end of the slender catheter-like part into the clamping hole with a rubber ring of the lower circular fixed clamping mechanism, adjust the state of the part and the upper circular movable clamping mechanism, so that the other end of the part is inserted into the clamping hole with a rubber ring of the upper circular movable clamping mechanism, press the upper circular movable clamping mechanism so that it is tightly combined with the circular ribs on the upper part of the cylinder to achieve a sealing effect, and complete the part clamping work.

10. The method according to claim 8, characterized in that The method further comprises: When the spraying time is reached, open the paint drain valve and close the paint reflux control valve to allow the paint to flow back to the paint mixing cylinder along the paint drain pipe at the bottom of the cylinder, completing the paint recovery work; The exhaust fan is always turned on during the painting process to accelerate the drying and curing speed of the parts and complete the drying and curing of the paint-removed parts; Lift and remove the upper circular movable clamping mechanism; Pull the parts out of the circular movable clamping mechanism and conduct inspection.

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