Flow coating and dip-coating integrated flow coating device

Abstract

The invention discloses a flow coating device integrating flow coating and dip coating. The flow coating device comprises a frame main body; a pipeline system; a stirrer is arranged in the frame main body; the flow coating assembly comprises a spraying part and a dip-coating pool which are communicated with the stirrer through a pipeline system; and the pump valve assembly is arranged in the pipeline system and is used for communicating the dip-coating pool with the stirrer to form coating circulation. According to the scheme, the stirrer, the flow coating assembly and the dip-coating pool are integrated through the frame body to form physical integration, and a coating circulation path is established through the pipeline system. And meanwhile, the pump valve assembly is directly embedded into a pipeline system, so that closed-loop flowing of stirring, spraying / dip-coating and recycling of the coating is completed in a closed environment, and volatilization pollution caused by a traditional open pipeline is eliminated.

Description

Technical Field

[0001] The present invention relates to the technical field of flow coating devices, and in particular to a flow coating device integrating flow coating and dip coating. Background Art

[0002] In the field of surface treatment of metal products, flow coating and dip coating are two common coating processes. Traditional equipment usually separates the flow coating machine from the dip coating tank. The flow coating machine requires a prefabricated concrete foundation pit to fix the equipment position, and the dip coating tank is separately arranged on the workshop floor. This discrete design increases the floor area of the equipment by about 30%-40%, and residual coatings are easily accumulated inside the pit, making it difficult to clean, resulting in environmental pollution in the workshop. For example, the "Horizontal Fluidized Bed Dip Powder Coating Production Line" disclosed in the Chinese patent literature, with the publication number "CN117753588A", includes a support frame, a coating box is arranged on one side of the support frame, and a processing mechanism is installed inside the coating box. The processing mechanism includes a processing box, a lifting component, and a heat preservation component. In the present invention, the connecting plate can assist in connecting the workpiece with the transmission component, and the transmission component can be used to drive the displacement of the workpiece, facilitating the processing of the workpiece with different processes. The frame is connected to the support frame, which can increase the stability of the entire device during use.

[0003] The existing pit installation method of the flow coating machine has significant defects: First, the pit construction needs to damage the original floor structure of the workshop, increasing the infrastructure cost; second, the maintenance space for equipment inside the pit is narrow, and when replacing the pump valve assembly, the machine needs to be shut down and workers need to enter the pit manually, which poses a safety hazard. In addition, the paint transfer between the dip coating tank and the flow coating machine relies on external pipeline connections, resulting in the paint being exposed to the open environment, prone to volatilization pollution and impurity mixing problems. Summary of the Invention

[0004] In view of the above-mentioned situation where the existing flow coating machine and dip coating tank are separately arranged, prefabricated foundations are required, resulting in a large floor area, difficult cleaning, and a large workshop environment, the present invention provides a flow coating device integrating flow coating and dip coating. Through the integrated structure of the frame body integrating the mixer, flow coating component, and dip coating tank, and cooperating with the pump valve linkage switching and slope surface diversion recovery system, it solves the problems of large floor area, low process switching efficiency, and paint residue caused by the separation of traditional equipment; thus achieving the synergistic effects of improved space utilization rate, shortened process switching time, and reduced paint waste rate.

[0005] To achieve the above object, the present invention adopts the following technical solutions: A flow coating device integrating flow coating and dip coating, comprising: a frame body; a pipeline system; a mixer is arranged inside the frame body; a flow coating component, including a spraying part and a dip coating tank communicated with the mixer through the pipeline system; a pump valve component is arranged inside the pipeline system to connect the dip coating tank and the mixer to form a paint circulation.

[0006] This integrated flow coating and dip coating device integrates a mixer, a flow coating component, and a dip coating tank through a frame body to form a physical integration, and uses a pipeline system to establish a coating circulation path. In traditional equipment, the separation of the flow coater and the dip coating tank leads to a loose workshop layout. In this solution, the pump valve assembly is directly embedded in the pipeline system, enabling the coating to complete a closed-loop flow of "stirring → spraying / dip coating → recycling" in a closed environment, eliminating the volatilization pollution caused by traditional open pipelines. This structure breakthroughly realizes the coexistence of two process modes in a single device. The operator only needs to switch the valve to change the operation mode, without moving the workpiece or adjusting the production line layout.

[0007] Therefore, the present invention has the following beneficial effects: The combination of dual-pump separate control and a linkage valve group eliminates cross-contamination during process switching by physically isolating the flow coating / dip coating pipelines. At the same time, mechanical linkage is used to reduce the probability of misoperation, improving the system reliability and reducing the maintenance cost.

[0008] The three-stage recovery structure of the slope surface - filter screen frame - dispersion disk forms a synergistic effect of directional diversion, impurity interception, and dynamic dispersion, reducing the coating residue amount and suppressing the need for shutdown cleaning caused by the precipitation of metal particles.

[0009] The slide rail pin positioning and modular component assembly method break through the traditional bolt fixation mode, enabling rapid reorganization of the equipment functional units, shortening the production line conversion time, and adapting to the production requirements of multiple varieties.

[0010] The passive dispersion disk with clearance fit on the stirring shaft utilizes the fluid kinetic energy to achieve gradient release of the coating, solving the problem of uneven mixing of high-solid-content coatings, narrowing the fluctuation range of the coating thickness, and improving product consistency. Description of the Drawings

[0011] Figure 1 is the structural schematic diagram of the present invention.

[0012] Figure 2 is Figure 1 the partial enlarged view of A in

[0013] Figure 3 is Figure 2 the top view of the dispersion disk in

[0014] In the figure: 1. Frame body, 16. Slide rail, 17. Slide block, 19. Positioning hole, 2. Mixer, 20. Main shaft, 21. Stirring blade, 22. Dispersion disk, 23. Flow guide groove, 3. Flow coating component, 30. Control valve, 31. First pipeline, 32. Spraying part, 33. Second pipeline, 4. Dip coating tank, 42. Slope surface, 43. Recovery pipeline, 51. First pump, 52. Second pump, 55. Vent valve, 56. Linking rod, 57. Switching handle, 58. Filter screen frame. Detailed Embodiment

[0015] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions.

[0016] Example 1 like Figure 1 As shown, this embodiment describes in detail a flow coating device integrating flow coating and dipping coating, wherein the frame body 1 is welded by longitudinal columns and transverse support beams to form a rigid frame, a parallel slide rail 16 is arranged on the top for installing the flow coating assembly 3 and the dipping pool 4 module, and the bottom base is fixed with bolts to the mixer 2. The main shaft 20 of the mixer 2 vertically penetrates the sealed shell, and a stirring blade 21 is installed at the bottom, and the end of the blade maintains an appropriate gap with the inner wall of the shell to form a fluid shear effect. The flow coating assembly 3 includes a spraying part 32 connected by a first pipe 31, and the spraying part 32 is fixed to the side of the frame by an adjustable angle bracket, and its spray axis forms a spatial correspondence with the central area of ​​the dipping pool 4. The dipping pool 4 is a rectangular stainless steel box, and the bottom of the pool is tilted to one side as a whole to form a slope surface 42, and the end of the slope surface is directly connected to the inlet of the recovery pipeline 43. The pipeline is extended to the upper opening of the mixer 2 by a flange connection, and the pipe mouth is suspended above the movement trajectory of the stirring blade 21 to form a free fall area.

[0017] The control logic of the pump-valve assembly is based on the separate control of the first pump 51 and the second pump 52 and the valve linkage. The inlet of the first pump 51 is connected to the bottom discharge port of the mixer 2 through a rigid pipeline, and a three-way diversion structure is set at the outlet end to connect the control valve 30 and the second valve 54 respectively. The outlet of the control valve 30 is connected to the spraying part 32 through the first pipeline 31, and the outlet of the second valve 54 is tangentially connected to the middle of the side wall of the dipping pool 4 through the second pipeline 33. The inlet of the second pump 52 is connected to the end of the slope surface 42 at the bottom of the dipping pool 4 through the vent valve 55, and the outlet pipeline is connected to the top feed port of the mixer 2. When switching to the flow coating mode, the linkage mechanism opens the first valve 53 and closes the second valve 54, and the paint extracted by the first pump 51 is transported to the spraying part 32 through the control valve 30 to form an atomized spray; when switching to the dipping mode, the second valve 54 is opened to inject the paint into the dipping pool 4, and the first valve 53 is closed to block the spray passage. The inclination angle of the slope surface 42 is optimized through fluid dynamics, so that the residual paint can form a laminar flow under the action of its own weight, and form a continuous recovery path in conjunction with the geometric shape of the recovery pipe 43 and the negative pressure suction of the second pump 52.

[0018] In this embodiment, the cross-section of the slide rail 16 at the top of the frame body 1 and the slider 17 at the bottom of the module form an interference fit, which not only ensures the bearing stability but also allows for thermal expansion compensation; the universal adjustment mechanism of the bracket of the spraying part 32 is internally provided with damping elements to suppress the vibration transmission during high-pressure spraying; the inlet of the second pipeline 33 on the side wall of the dip coating tank 4 adopts a tapered structure to generate a stable vortex for the tangentially injected coating flow; the connection between the recovery pipeline 43 and the top of the mixer 2 is arranged eccentrically with a flange, and the bending moment generated by the self-weight of the pipeline is used to offset the thermal stress deformation. These structural features jointly build the reliability foundation of the system. For example, during dip coating operations, the velocity gradient formed by the swirling action in the tank improves the uniformity of the coating adhesion on the workpiece surface; the combination of a fixed angle of the spraying part 32 and continuous feeding in the flow coating mode ensures that the spraying pressure is stable within the process requirements.

[0019] In this embodiment, two coating processes are seamlessly switched within a single device through mechanical structures. The coincidence design of the axis of the bottom slope surface 42 of the dip coating tank 4 and the recovery pipeline 43 enables the coating recovery process without additional guiding devices, and the principle lies in that the fluid pressure gradient formed at the end of the slope surface overcomes the yield stress of the coating. The pressure zone control of the pump-valve assembly naturally forms the working pressure required for different processes through the matching relationship between the opening and closing states of the valves and the pumping flow rate. The pin positioning system of the slide rail 16 and the slider 17 of the frame body 1 allows for the rapid adjustment of the spatial layout of the dip coating tank 4 and the spraying part 32 according to the workpiece size. For example, when processing long-axis parts, the dip coating tank can be laterally moved along the slide rail, and at this time, the flexible connection part of the second pipeline 33 needs to be synchronously corrected. Further, the access position of the second pipeline 33 in the dip coating tank 4 can be changed to adjust the swirling intensity, or a slide rail 16 system with different cross-sectional shapes can be adopted.

[0020] During use, before starting the equipment, it is necessary to check the air tightness of each connecting pipeline of the pump-valve assembly, manually open the first valve and close the second valve to make the system in the flow coating preparation state. After the operator starts the first pump, the coating in the mixer is transported to the control valve through the first pipeline, and the atomization pressure of the spraying part is controlled by adjusting the opening of the valve stem. At this time, the second pump remains in the stopped state. During flow coating operations, it is necessary to keep the vertical distance between the spray gun and the workpiece surface constant, and the spraying trajectory should avoid the opening area of the dip coating tank to prevent the atomized coating from falling into the tank and affecting the composition of the dip coating liquid.

[0021] When converting the dip coating mode, first stop the operation of the first pump, manually switch the second valve to the open state and close the first valve. After starting the second pump, the paint deposited at the bottom of the dip coating tank returns to the mixer through the recovery pipeline under the action of negative pressure. At this time, it is necessary to observe the fluid state of the transparent section of the pipeline. If air bubbles accumulate, exhaust gas in a timely manner. When the workpiece is immersed in the tank, the descending speed should be controlled so that the amplitude of the liquid level fluctuation does not exceed the safety scale line of the tank edge. After dip coating is completed, the second pump continues to operate until the liquid level in the tank drops to the lowest recovery level. At this time, close the second valve and open the drain valve to discharge the residual paint in the pipeline into the waste bucket. During maintenance, it is necessary to clean the sediment at the elbow of the recovery pipeline first. This part is prone to forming paint lumps due to the change in flow velocity. In practical applications, it is found that the sealing surface of the control valve may be worn after frequent adjustment. It is recommended to use a cemented carbide valve core to extend the service life. For high-solid-content paints, auxiliary stirring paddles can be installed in the mixer to prevent precipitation.

[0022] Example 2 As Figure 1 Shown in the figure, on the basis of the structure of Example 1, the flow coating and dip coating integrated device of this embodiment realizes the mechanical synchronous control of the pump-valve assembly by introducing the linkage rod 56 mechanism. An installation platform is welded on the side column of the frame body 1. The linkage rod 56 is horizontally fixed on the surface of this platform through the hinge supports at both ends, and a switching handle 57 is vertically welded in the middle of the rod body. U-shaped card slots are respectively machined at the top ends of the valve stems of the first valve 53 and the second valve 54, and are rigidly connected to both ends of the linkage rod 56 through pin shafts. When the operator holds the switching handle 57 and pushes it along the chute to the first working position, the linkage rod 56 rotates clockwise around the middle fulcrum, driving the valve stem of the first valve 53 to lift to the fully open position. At the same time, the valve stem of the second valve 54 at the other end of the linkage rod is pressed down to the fully closed state; when pushed to the second working position, the reverse movement closes the first valve 53 and opens the second valve 54.

[0023] This linkage mechanism forms an accurate mechanical coupling with the pump-valve system of Example 1: At the tee shunt structure at the outlet of the first pump 51, the valve core of the first valve 53 adopts a conical surface seal design, and its opening stroke is linearly corresponding to the rotation angle of the linkage rod 56; The valve seat of the second valve 54 is embedded with a guide groove to ensure that the movement track of the valve plate is perpendicular to the tangential inlet axis of the second pipeline 33. The lever ratio of the linkage rod 56 is optimized so that the displacement of the handle 57 exactly meets the full opening and closing requirements of the two valves, and there is no need to pause or fine-tune during the operation process. The inlet of the second pipeline 33 on the side wall of the dip coating tank 4 maintains the tapered structure of Example 1 to ensure that the swirl intensity formed by the tangential injection of the paint matches the linkage switching speed when the second valve 54 is opened.

[0024] The introduction of the linkage rod 56 system provides a more practical structural support for the dual-pump control logic of Embodiment 1. When switching to the flow coating mode, the handle 57 pushes the linkage rod 56 to open the first valve 53. At this time, all the coating material output by the first pump 51 flows through the control valve 30 to the spraying part 32, while the complete closing of the second valve 54 blocks the leakage path to the dip coating tank 4. When switching to the dip coating mode, the linkage rod 56 moves in the reverse direction to synchronously close the first valve 53 and open the second valve 54. The coating material output by the first pump 51 then flows into the dip coating tank 4 through the second pipeline 33. This mechanical interlock structure completely eliminates the risk of response delay or misoperation that may occur in traditional solenoid valves, especially showing significant reliability advantages in humid and oily environments.

[0025] In addition, the installation heights of the hinge supports at both ends of the linkage rod 56 are precisely calculated to ensure that no lateral component force is generated during the movement of the valve stem. A polytetrafluoroethylene bushing is embedded in the chute of the handle 57 to reduce the frictional resistance and prevent rusting of the metal contact surfaces. A disc spring is provided at the connection of the valve stems of the first valve 53 and the second valve 54 to compensate for manufacturing and assembly errors and absorb pipeline vibration shocks. These features, together with the slide rail 16 positioning system and the ramp surface 42 diversion structure of Embodiment 1, constitute a complete mechanical constraint system: when the dip coating tank 4 is adjusted in position along the slide rail 16, the flexible connection part of the second pipeline 33 can adaptively displace, while the rigid transmission of the linkage rod 56 maintains the valve opening and closing accuracy unchanged.

[0026] The core improvement of this embodiment is to upgrade the separate control of the valves in Embodiment 1 to a mechanically linked synchronous switch. In the traditional solution, when switching between the flow coating and dip coating modes, two valves need to be operated separately, resulting in a time difference and causing pipeline pressure fluctuations. In this solution, instantaneous switching is achieved through the lever transmission of the linkage rod 56.

[0027] In this embodiment, the mechanical synchronization of the linkage rod 56 ensures that the opening and closing states of the valves strictly correspond to the pressure changes of the pump-valve assembly; the geometric matching of the ramp surface 42 of the dip coating tank 4 and the recovery pipeline 43 maintains the continuity of the coating material recovery flow; and the slide rail 16 system of the frame body 1 provides a physical basis for the spatial adjustment of the functional modules. When dealing with coatings of different viscosities, the operating force of the linkage rod 56 will change with the fluid resistance. At this time, the lever ratio of the handle 57 can be adjusted for adaptation. According to the actual application feedback, this mechanical linkage system has no displacement deviation in continuous ten-thousand-time switching tests, significantly superior to traditional electric actuators.

[0028] Embodiment 3 As Figure 1As shown, the integrated flow coating and dipping device in this embodiment is modularly upgraded by adding a slide rail positioning system and a detachable filter frame 58 on the basis of the structure of Example 1. The bottom base surface of the frame body 1 is fixedly installed with a slide rail 16 along the length direction. The slide rail is formed by processing the cross section of an I-beam, and a continuous guide groove is provided on the upper surface and positioning holes 19 are punched at equal intervals. A slider 17 matching the cross section of the slide rail 16 is welded to the bottom of the mixer 2. A polymer wear-resistant bushing is embedded inside the slider to form a sliding pair. A spring-loaded latch mechanism is installed through a hole in the side wall. The end of the latch is processed into a conical guide head to form a self-centering fit with the chamfered edge of the positioning hole 19. A filter frame 58 is added at the entrance of the recovery pipe 43 of the slope surface 42 at the bottom of the dipping pool 4. The frame is connected to the pool wall through a hinge shaft, and a magnetic positioning block is provided on the edge of the frame to form a closed lock with the pre-embedded magnetic suction component in the pool wall.

[0029] The characteristics of the slide rail positioning system include: the I-beam cross-section slide rail 16 provides bidirectional bending rigidity to prevent the slider 17 from tipping over under load; the preload design of the latch spring ensures that the locked state is maintained under equipment vibration conditions, while allowing manual pulling and unlocking; the spacing of the positioning holes 19 is set to form an integer multiple of the standard workpiece size to achieve rapid alignment during process adjustment. The hinge axis of the filter frame 58 is parallel to the inclination direction of the slope surface 42. When the frame is flipped, the filter can be completely separated from the working surface of the pool bottom. The contact surface of the magnetic positioning block is processed into a concave and convex mosaic structure to enhance the anti-displacement ability.

[0030] In this embodiment, when the mixer 2 moves to different stations along the slide rail 16, the mechanical locking of the pin and the positioning hole 19 ensures that the axis of the feed pipeline and the recovery pipeline 43 are accurately aligned; the filter frame 58 forms a paint filtering barrier in the closed state, and its magnetic fixation method allows for quick disassembly and cleaning without affecting the sealing of the tank body. The matching surface design of the slide rail 16 and the slider 17 retains an appropriate gap to compensate for the thermal expansion effect.

[0031] The structural integration of the filter frame 58 takes maintenance convenience into consideration. When the frame is flipped to the extreme position of 150°, the torque generated by its own weight and the hinge damping form a balanced state, which is convenient for the operator to brush the filter. The engineering details of the slide rail positioning system include: the taper angle of the pin guide head forms a progressive fit with the chamfer of the positioning hole 19, eliminating the jamming phenomenon caused by processing errors; the slotted design on the side wall of the slider 17 ensures that the pin pulling stroke is not interfered with by the equipment housing. These features are physically complementary to the linkage rod 56 mechanism of Example 1 - when the position of the mixer 2 is adjusted, the flexible connection section of the second pipe 31 can adapt to the change in length, and the valve linkage system maintains a stable opening and closing sequence.

[0032] In addition, further, the cross section of the slide rail 16 can be changed to a dovetail groove structure to enhance the torsion resistance, or an electromagnetic lock can be used instead of a latch mechanical lock.

[0033] Example 4 like Figure 2 , 3 As shown, the integrated flow coating and dipping device in this embodiment is based on the structure of Example 1, and the optimized control of the coating flow field is achieved by introducing the annular dispersion disk 22 and its guide groove 23 design. The middle shaft section of the main shaft 20 of the mixer 2 is processed with a stepped assembly surface, and the annular dispersion disk 22 is sleeved on the main shaft 20 through a clearance fit, and the outer edge of the disk body and the inner wall of the mixer 2 shell form an annular flow channel. The dispersion disk 22 is located directly below the outlet of the recovery pipe 43, and its axial position is precisely positioned by the shoulder limit and the retaining spring. A plurality of groups of guide grooves 23 are evenly distributed along the circumferential direction on the surface of the disk body, and the bottom contour of each groove is wedge-shaped, and its depth gradually decreases along the rotation direction of the stirring blade 21, and the inclination angle of the groove wall forms an acute angle with the axis of the main shaft 20.

[0034] The depth-reducing structure of the guide groove 23 accelerates the paint flowing through the groove; the inclination angle of the groove wall forms reverse interference with the rotation direction of the stirring blade 21; and the circumferentially uniform layout ensures the symmetry of the flow field. When the recovered paint falls to the surface of the dispersion disk 22 through the pipe 43, part of the fluid directly enters the guide groove 23, and is accelerated and thrown out in the direction of decreasing depth of the groove under the action of the rotating centrifugal force, forming a high-speed jet; the other part of the fluid diffuses radially along the surface of the disk, interacting with the swirl generated by the stirring blade 21. This dual-path flow mode forms multi-scale turbulence inside the mixer 2, effectively solving the phenomenon of pigment agglomeration.

[0035] The slide rail 16 system of the frame body 1 maintains the positioning accuracy of Example 1, ensuring the vertical alignment between the outlet of the recovery pipe 43 and the dispersion disc 22. The dual pump control logic of the pump valve assembly has not been adjusted, but the throttling effect of the guide groove 23 causes characteristic fluctuations in the outlet pressure of the first pump 51, which is naturally smoothed by the damping characteristics of the control valve 30. The laminar guiding effect of the slope surface 42 at the bottom of the dip coating pool 4 and the turbulent flow generation mechanism of the dispersion disc 22 form a process complement - the slope surface 42 ensures the smooth recovery of large particles, while the jet shear of the guide groove 23 refines the particle size distribution. The annular dispersion disc 22 is matched with the main shaft clearance, allowing the disc body to produce a slight swing under the action of fluid resistance, thereby enhancing the kneading effect on high-viscosity coatings; the retaining spring locking structure has a built-in rubber buffer layer to absorb the vibration energy of the main shaft 20 when it rotates at high speed; the inlet edge of the guide groove 23 is rounded to reduce flow separation losses. These features form a control synergy with the linkage rod 56 mechanism of Example 1 - when switched to the flow coating mode, the opening adjustment of the control valve 30 can synchronously change the shear strength of the guide groove 23 area, thereby achieving dynamic adaptation of the rheological properties of the coating.

[0036] In this embodiment, the traditional mixer relies on direct shearing by the impeller, while in this solution, a gradient shear field is formed through the tapering acceleration effect of the diversion groove 23 and the interference effect of the swirl of the stirring blade 21. When the coating material falls onto the surface of the dispersion disk 22 through the recovery pipeline 43, its gravitational potential energy is converted into kinetic energy in the diversion groove 23, and this energy is released in stages through the change in groove depth, forming vortex structures with different wavelengths in the area of the stirring blade 21.

[0037] It should be noted that the slight swing of the dispersion disk 22 can automatically remove the sediment on the inner wall of the housing; the pressure difference generated by the depth gradient of the diversion groove 23 forms an axial secondary flow to compensate for the axial conveying capacity of the stirring blade 21; the existence of the annular flow channel prolongs the residence time of the coating material in the high-efficiency dispersion area.

[0038] In addition, further, microscopic textures can be added to the surface of the diversion groove 23 to change the boundary layer state, or a variable-spacing groove body distribution can be adopted to stimulate turbulent flow at a specific frequency.

[0039] In this embodiment, the operator moves the mixer 2 along the slide rail 16 to directly below the recovery pipeline 43 of the dip coating tank 4. After the mixer 2 is started, the main shaft 20 drives the dispersion disk 22 to rotate, and the recovered coating material falls onto the surface of the disk body through the pipeline 43. Part of the fluid enters the diversion groove 23 and is accelerated and ejected under the action of centrifugal force, forming a jet flow with a direction opposite to the rotation direction of the stirring blade 21.

[0040] During the flow coating operation, the linkage rod 56 is switched to the first working position so that the coating material is atomized and sprayed through the spraying part 32, that is, the spray gun. At this time, the rotation speed of the dispersion disk 22 should be adjusted to the lower limit to prevent the coating viscosity from decreasing due to excessive shearing. When converting to the dip coating mode, the mixer 2 needs to be stopped first, and after the linkage rod 56 is completely switched to the second working position, the equipment is restarted to avoid damaging the structure of the diversion groove 23 due to the hydraulic impact during the valve switching moment. During the dip coating process, the operator regularly checks whether the gap between the outer edge of the dispersion disk 22 and the inner wall of the housing is uniform. The multi-point gap can be measured with a feeler gauge, and when the deviation exceeds the allowable value, the coaxiality of the main shaft 20 needs to be adjusted.

Claims

1. A flow coating device integrating flow coating and dip coating, characterized in that Comprising: Frame body (1); Pipeline system; A mixer (2) is arranged inside the frame body (1); Flow coating assembly (3), including a spraying part (32) and a dipping pool (4) connected to the mixer (2) through the pipeline system; Pump valve assembly, arranged inside the pipeline system, connecting the dipping pool (4) and the mixer to form a coating circulation.

2. The flow coating device according to claim 1, characterized in that: The pump valve assembly includes a first pump (51) and a second pump (52); The inlet end of the first pump (51) is connected to the mixer (2) through a first valve (53), and the outlet end is connected to the dipping pool (4) through a second valve (54).

3. The flow coating device according to claim 2, characterized in that: The inlet end of the second pump (52) is connected to the bottom of the dipping pool (4) through a vent valve (55), and the outlet end is connected to the mixer (2).

4. The flow coating device according to claim 3, characterized in that: The pipeline system includes a first pipeline (31); a control valve (30) is arranged between the first pump (51) and the first pipeline (31), and the control valve (30) is communicated with the spraying part (32).

5. The flow coating device according to claim 3, characterized in that: The pipeline system includes a second pipeline (33); the second valve (54) is communicated with the dipping pool (4) through the second pipeline (33).

6. The flow coating device according to claim 1, characterized in that: A slope surface (42) is provided at the bottom of the dipping pool (4), and a recovery pipeline (43) is connected to the lowest end of the slope surface (42); the mixer (2) includes a main shaft (20) and a stirring blade (21) arranged at the bottom end of the main shaft, and the recovery pipeline (43) extends into the mixer (2) and the pipe orifice is located above the stirring blade (21).

7. The flow coating device according to claim 2, characterized in that: The first valve (53) and the second valve (54) are mechanically connected through a linkage rod (56), a switching handle (57) is arranged in the middle of the linkage rod (56), when the switching handle (57) is pushed to the first working position, the first valve (53) is opened and the second valve (54) is closed, and when pushed to the second working position, the first valve (53) is closed and the second valve (54) is opened.

8. The flow coating device according to claim 6, characterized in that: A rotatable filter screen frame (58) is provided at the inlet of the recovery pipeline (43), the filter screen frame (58) is connected to the inner wall of the dipping pool (4) through a hinge, and a positioning block magnetically fixed to the pool wall is arranged at the edge of the filter screen frame.

9. The flow coating device according to any one of claims 1-8, characterized in that: A slide rail (16) is provided on the frame body (1), a slider (17) cooperating with the slide rail (16) is arranged at the bottom of the mixer (2), a spring-loaded bolt is arranged on the side wall of the slider (17), and a plurality of positioning holes (19) cooperating with the bolt are arranged along the length direction of the slide rail (16).

10. The flow coating device according to claim 6, characterized in that: An annular dispersion disk (22) is sleeved on the main shaft (20), and the dispersion disk (22) is in clearance fit with the main shaft (20); a circumferentially distributed flow guiding groove (23) is provided on the surface of the dispersion disk (22), and the depth of the flow guiding groove (23) gradually decreases along the stirring rotation direction.

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