Impulse type coating fluid director

Abstract

The utility model discloses a pulse type coating fluid director which comprises a fluid director pipe and a controller, a coating pipe is arranged at the front end of the fluid director pipe, a pulse pipe is arranged at the rear end of the fluid director pipe, the other end of the coating pipe is connected with a coating storage device, and the other end of the pulse pipe is connected with a compressed air bag. A pulse electromagnetic valve and a flow regulating valve are sequentially arranged at an outlet of the compressed air bag, a connecting pipe is arranged between the coating storage device and the pulse pipe, a nozzle is arranged at the outlet end of the flow guide pipe, an ultrasonic detection head is arranged on the nozzle, and the controller is electrically connected with the ultrasonic detection head, the pulse electromagnetic valve and the flow regulating valve. The flow coating device has the characteristics of uniform flow coating and improved casting quality.

Description

Technical Field

[0001] This utility model relates to a coating flow device, and more particularly to a pulsed coating flow guide. Background Technology

[0002] Flow coating is a casting process used to coat the surface of a mold with a refractory coating. Its core principle is to uniformly cover the mold cavity surface with a flowing coating liquid, forming a protective layer that improves the surface quality of the casting and prevents the molten metal from corroding the sand mold.

[0003] In traditional flow coating processes, a typical structure employs a delivery pump, delivery pipe, and flow coating gun. This structure provides a constant flow coating pressure. However, the internal cavities of castings are uneven. For thin-walled sections, the flow coating gun, propelled by the delivery pump, sprays the coating liquid at a certain pressure. Under the impact force, the coating liquid can easily damage the thin-walled cavities. For thick-walled parts, this can easily lead to insufficient coating liquid, resulting in uneven coating thickness, affecting casting quality, causing material waste, and casting defects. Utility Model Content

[0004] The purpose of this invention is to provide a pulse-type coating guide. This invention features uniform coating and improves the quality of castings.

[0005] The technical solution of this utility model is as follows: a pulse coating guide includes a guide tube and a controller. The front end of the guide tube is provided with a coating tube, and the rear end of the guide tube is provided with a pulse tube. The other end of the coating tube is connected to a coating reservoir, and the other end of the pulse tube is connected to a compressed air manifold. A pulse solenoid valve and a flow regulating valve are sequentially provided at the outlet of the compressed air manifold. A connecting pipe is provided between the coating reservoir and the pulse tube. A nozzle is provided at the outlet end of the guide tube, and an ultrasonic detection head is provided on the nozzle. The controller is electrically connected to the ultrasonic detection head, the pulse solenoid valve, and the flow regulating valve respectively.

[0006] In the aforementioned pulse-type coating guide, a filtration unit is provided inside the coating tube, and the filtration unit includes a magnetic filter and a particulate filter.

[0007] In the aforementioned pulse-type coating guide, the connecting pipe is equipped with a one-way valve, which consists of two symmetrically distributed arc-shaped diaphragm flaps. One end of each arc-shaped diaphragm flap is connected to the inner wall of the connecting pipe, and the other end of each arc-shaped diaphragm flap abuts against each other to seal the connecting pipe.

[0008] In the aforementioned pulse coating guide, a bellows is provided between the guide tube and the nozzle.

[0009] In the aforementioned pulse-type coating guide, the outside of the guide tube is provided with an annular heat insulation sleeve, and an annular gap is formed between the heat insulation sleeve and the guide tube. Hot gas is introduced into the annular gap, and the heat insulation sleeve is provided with an air inlet pipe and an air outlet pipe that communicate with the annular gap.

[0010] In the aforementioned pulse coating guide, the nozzle has a flat structure.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0012] This invention employs pulse spraying, in which compressed gas from the compressed air tank enters the guide tube through the pulse tube, and then enters the paint reservoir through the connecting tube. This pushes the paint liquid in the paint reservoir through the paint tube into the guide tube. The gas and paint liquid collide and mix in the guide tube, the paint liquid is refined, and then sprayed out from the nozzle in a pulse manner, improving the uniformity of the coating.

[0013] The thickness of the casting cavity is detected by an ultrasonic testing head. Feedback from the detected thickness is sent to a controller, which then adjusts the pressure and flow rate of the coating liquid using pulse solenoid valves and flow regulating valves. Different impact forces and flow rates are applied to cavities of varying thicknesses, allowing for better adaptation to different cavity thicknesses. This avoids excessive pressure damaging thin-walled cavities, reduces coating splashing, and ensures sufficient coating volume and adhesion in thick-walled cavities, thereby improving casting quality and saving material. It is suitable for efficient and uniform coating of complex mold surfaces.

[0014] Therefore, this utility model has the characteristics of uniform coating and improved casting quality. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model.

[0016] Figure 2 This is a schematic diagram of the internal structure of the coating pipe.

[0017] Figure 3 This is a schematic diagram of the internal structure of the connecting pipe.

[0018] Figure 4 This is a schematic diagram of the structure of the heat insulation jacket.

[0019] The labels in the attached diagram are as follows: 1. Guide pipe; 2. Paint pipe; 21. Paint reservoir; 22. Magnetic filter screen; 23. Particle filter screen; 3. Pulse pipe; 31. Compressed air manifold; 32. Pulse solenoid valve; 33. Flow regulating valve; 4. Connecting pipe; 41. Arc-shaped diaphragm; 5. Nozzle; 51. Ultrasonic detection head; 52. Corrugated pipe; 6. Heat insulation sleeve; 61. Circumferential seam; 62. Air inlet pipe; 63. Air outlet pipe. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention.

[0021] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0022] Example:

[0023] like Figures 1-4 As shown, the pulse coating guide includes a guide tube 1 and a controller. The front end of the guide tube 1 is provided with a coating tube 2, and the rear end of the guide tube 1 is provided with a pulse tube 3. The other end of the coating tube 2 is connected to a coating reservoir 21, and the other end of the pulse tube 3 is connected to a compressed air manifold 31. A pulse solenoid valve 32 and a flow regulating valve 33 are sequentially provided at the outlet of the compressed air manifold 31. A connecting pipe 4 is provided between the coating reservoir 21 and the pulse tube 3. A nozzle 5 is provided at the outlet end of the guide tube 1, and an ultrasonic detection head 51 is provided on the nozzle 5. The controller is electrically connected to the ultrasonic detection head 51, the pulse solenoid valve 32, and the flow regulating valve 33 respectively.

[0024] Under the control of the pulse solenoid valve 32 and the flow regulating valve 33, the compressed gas in the compressed air tank 31 enters the guide pipe 1 through the pulse pipe 3, and enters the paint storage tank 21 through the connecting pipe 4. This pushes the paint liquid in the paint storage tank 21 into the guide pipe 1 through the paint pipe 2. The gas and paint liquid collide and mix in the guide pipe 1, the paint liquid is refined, and it is sprayed out from the nozzle 5 in a pulse manner, which improves the uniformity of the coating.

[0025] The thickness of the casting cavity is detected by the ultrasonic testing head 51. The different thicknesses detected are fed back to the controller. The controller controls the pulse solenoid valve 32 and the flow regulating valve 33 to adjust the pressure and flow of the coating liquid according to the preset thickness-pressure-flow conditions. This can better adapt to the flow of coating liquid in cavities of different thicknesses, avoid excessive pressure from damaging thin-walled cavities, and ensure sufficient coating volume and adhesion in thick-walled cavities, thereby improving casting quality and saving materials.

[0026] The coating tube 2 is equipped with a filtration unit, which includes a magnetic filter screen 22 and a particulate filter screen 23. The magnetic filter screen 22 and the particulate filter screen 23 respectively filter out metallic impurities and large particles in the coating liquid, improving the purity and fineness of the coating liquid, thereby improving the quality of the coating process.

[0027] The connecting pipe 4 is equipped with a one-way valve, which consists of two symmetrically distributed arc-shaped diaphragm flaps 41. One end of each arc-shaped diaphragm flap 41 is connected to the inner wall of the connecting pipe 4, and the other end of each arc-shaped diaphragm flap 41 abuts against each other to seal the connecting pipe 4. The one-way valve structure prevents the paint in the paint reservoir 21 from flowing back into the pulse pipe 3 and the compressed air manifold 31 through the connecting pipe 4.

[0028] A bellows 52 is provided between the guide pipe 1 and the nozzle 5. The bellows 52 facilitates the adjustment of the angle and position of the nozzle 5, thereby enabling more accurate flow coating to be applied to different internal cavities of the casting.

[0029] The guide pipe 1 is surrounded by an annular heat insulation sleeve 6, forming an annular gap 61 between the heat insulation sleeve 6 and the guide pipe 1. Hot gas is introduced into the annular gap 61. The heat insulation sleeve 6 is equipped with an inlet pipe 62 and an outlet pipe 63 that communicate with the annular gap 61. Hot gas is introduced into the annular gap 61 through the inlet pipe 62, and the hot gas exchanges heat with the coating liquid in the guide pipe 1 to preheat the coating liquid, thereby spraying high-temperature coating liquid out from the nozzle 5, saving the time of subsequent heating and curing of the casting; the heat insulation sleeve 6 reduces heat loss and improves heat exchange efficiency.

[0030] The nozzle 5 adopts a flat structure, such as a duckbill nozzle, to disperse the flow coating pressure, expand the flow coating range, and improve the flow coating uniformity.

[0031] The parts of this utility model not described in detail are existing technologies and therefore will not be specifically described here.

Claims

1. A pulsed coating flow director characterized by: The utility model relates to a kind of coating spraying machine, including guide pipe (1) and controller, the front end of guide pipe (1) is equipped with paint pipe (2), the rear end of guide pipe (1) is equipped with pulse pipe (3), the other end of paint pipe (2) is connected with paint reservoir (21), the other end of pulse pipe (3) is connected with compressed gas bag (31), the outlet of compressed gas bag (31) is equipped with pulse solenoid valve (32) and flow regulating valve (33) in sequence, paint reservoir (21) is equipped with connecting pipe (4) with pulse pipe (3) between, the outlet end of guide pipe (1) is equipped with nozzle (5), nozzle (5) is equipped with ultrasonic detection head (51), controller is electrically connected with ultrasonic detection head (51), pulse solenoid valve (32) and flow regulating valve (33) respectively.

2. The pulsed-coated flow director of claim 1, wherein: The paint pipe (2) is provided with a filter unit, and the filter unit comprises a magnetic filter screen (22) and a particle filter screen (23).

3. The pulsed-coated flow director of claim 1, wherein: The connecting pipe (4) is provided with a one-way valve, the one-way valve is composed of two symmetrically distributed arc-shaped membrane petals (41), one end of the two arc-shaped membrane petals (41) is connected with the inner wall of the connecting pipe (4), and the other end of the two arc-shaped membrane petals (41) abuts against each other to seal the connecting pipe (4).

4. The pulsed-coated flow director of claim 1, wherein: The guide pipe (1) and the nozzle (5) are provided with a bellows (52) therebetween.

5. The pulsed-coated flow director of claim 1, wherein: The guide pipe (1) is provided with an annular heat insulation sleeve (6) outside, and an annular gap (61) is formed between the heat insulation sleeve (6) and the guide pipe (1), hot gas is introduced into the annular gap (61), and the heat insulation sleeve (6) is provided with an air inlet pipe (62) and an air outlet pipe (63) in communication with the annular gap (61).

6. The pulsed-coated flow director of claim 1, wherein: The nozzle (5) adopts a flat structure.

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