A paint pipe, a rotary cup and an atomizing spraying device

Abstract

The present application discloses a paint pipe, a rotary cup and an atomizing spraying device which are convenient to clean and applicable to multi-component coatings. For the paint pipe provided in the present application, a first paint passage and a first cleaning passage are provided inside the paint pipe; the first paint passage and the first cleaning passage penetrate through both ends of the paint pipe and are independently arranged respectively. The paint pipe provided by the present invention separates the paint passage and the cleaning passage, and is respectively provided with a first paint passage and a first cleaning passage. The setting of the independent cleaning passage enables the cup head of the rotary cup using the paint pipe to be cleaned without emptying the first paint passage, avoiding waste of paint; correspondingly, the rotary cup provided in the present application adopts the paint pipe and paint spray.

Description

Technical Field

[0001] The present disclosure generally relates to the technical field of spraying and equipment, and specifically relates to a paint pipe, a rotary cup, and an atomizing spraying device. Background Art

[0002] The paint pipe used in a general rotary cup only has a single paint supply function. Paint flows into the paint pipe from a micro-valve at the bottom of the rotary cup. A nozzle is connected to the top of the paint pipe. The paint enters the nozzle along the paint pipe, and the nozzle sprays the paint onto a distribution plate of the cup head. The cup head drives the distribution plate to rotate at a high speed to atomize the paint into fine particles.

[0003] The traditional paint pipe has a single structure and has two problems. First, when it is necessary to clean the cup head without replacing the paint, the traditional paint pipe needs to first empty the paint in the paint pipe and then inject a cleaning solvent. The cleaning solvent cleans the cup head through the main paint pipeline. This cleaning method causes paint waste on the one hand. On the other hand, after the cup head is cleaned, this section of the paint pipe needs to be pre-filled again, or when reaching the spraying position, the paint valve needs to be opened in advance so that the rotary cup starts spraying before reaching the workpiece. This requires the coating control system to set redundant control actions, increasing the design content of the control system. Second, the traditional paint pipe does not have a two-component mixing function. When spraying two-component paint, a pre-mixing method is generally adopted. Pre-mixing means that before the paint enters the rotary cup, the main agent and the curing agent of the paint have been mixed. The mixed paint enters the rotary cup for spraying like a single-component paint. Once the main agent and the curing agent of the paint are mixed, they must be used up within a certain time. If the curing time is exceeded, the paint will solidify in the rotary cup, rendering the entire rotary cup scrapped. To prevent solidification, if the spraying needs to be interrupted for a long time (such as testing, inspection, emergency failure, etc.), it is necessary to promptly empty the mixed paint and thoroughly clean the entire mixed pipeline. This will waste a large amount of paint and cleaning agent. If not processed in time, the rotary cup and some paint pipelines, valve islands, micro-valves, and paint mixers will be scrapped as a whole, causing very significant losses. Summary of the Invention

[0004] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide a paint pipe, a rotary cup, and an atomizing spraying device that are easy to clean and suitable for multi-component paints.

[0005] In a first aspect, the present application provides a paint pipe, in which a first paint channel and a first cleaning channel are provided; the first paint channel and the first cleaning channel penetrate through both ends of the paint pipe and are independently arranged respectively.

[0006] According to the technical solution provided by the embodiment of the present application, a paint mixer is installed in the first paint channel.

[0007] In a second aspect, the present application provides a rotary cup, including the above-mentioned coating pipe and a nozzle installed at one end of the coating pipe; a second coating channel communicating with the first coating channel and a second cleaning channel communicating with the first cleaning channel are provided in the nozzle;

[0008] The nozzle includes a nozzle base, a nozzle pipe, and a conical connecting part connecting the nozzle base and the nozzle pipe; the second cleaning channel includes a main cleaning channel, an inner cleaning channel, and an outer cleaning channel with interconnected inner cavities; the main cleaning channel communicates with the first cleaning channel; the inner cleaning channel communicates with the top end of the main cleaning channel; the outer cleaning channel is connected to the side wall of the main cleaning channel and exits from the side top of the nozzle base.

[0009] According to the technical solution provided by the embodiment of the present application, the included angle range between the axis of the main cleaning channel and the first coating channel is 15° - 19°, preferably 17°.

[0010] According to the technical solution provided by the embodiment of the present application, the included angle range between the axis of the outer cleaning channel and the first coating channel is 40° - 50°, preferably 45°.

[0011] According to the technical solution provided by the embodiment of the present application, the cone angle range of the conical connecting part is 25° - 35°, preferably 30°.

[0012] According to the technical solution provided by the embodiment of the present application, a sealing skeleton is also installed between the first coating channel and the nozzle.

[0013] According to the technical solution provided by the embodiment of the present application, the nozzle is threadedly connected to the coating pipe; a wrench opening is provided outside the nozzle.

[0014] According to the technical solution provided by the embodiment of the present application, a coating pipe base is provided at the end of the coating pipe away from the nozzle; the rotary cup further includes a motor base and a motor installed on the motor base; the coating pipe base is located between the motor and the motor base; the coating pipe base is fixed to the motor base by screws, and the motor is fixed to the motor base by a motor locking pin; the motor base and the coating pipe base are also electrically connected by conductive copper posts; the coating pipe and the nozzle are located inside the hollow motor spindle; a cup head is fixed at the end of the motor spindle, and a distribution plate is installed inside the cup head;

[0015] A conductive annular platform surrounding the coating tube is provided in the middle of the coating tube base; exhaust holes are radially formed on the annular platform, and an exhaust groove communicating with the exhaust holes is radially recessed at the bottom of the outer ring surface of the annular platform; an annular groove for inserting the annular platform is provided at the end of the motor; the outer ring surface of the annular groove is in interference fit with the outer ring surface of the annular platform.

[0016] According to the technical solution provided by the embodiment of the present application, a conductive bead is also connected in interference at the end of the coating tube base connected to the motor base.

[0017] According to the technical solution provided by the embodiment of the present application, corresponding guiding holes are radially formed on the side wall of the annular groove and the annular platform, and the locking pin passes through the side wall of the motor base and then passes through the guiding holes of the annular groove and the annular platform in sequence.

[0018] In a third aspect, the present application provides an atomizing spraying device equipped with any one of the above-mentioned swirler cups.

[0019] The coating tube provided by the present invention separates the coating channel and the cleaning channel, and is respectively provided with a first coating channel and a first cleaning channel. The setting of the independent cleaning channel enables the cup head of the swirler cup using the coating tube to be cleaned without emptying the first coating channel, avoiding waste of coating; correspondingly, the swirler cup provided by the present application adopts a split design of the coating tube and the paint nozzle, and a second coating channel and a second cleaning channel are arranged in the paint nozzle, wherein the second coating channel is connected to the first coating channel of the coating tube, and the second cleaning channel is communicated with the first cleaning channel; Therefore, in the swirler cup, the cleaning solvent can clean the cup head without passing through the coating pipeline; in the case of not needing to change colors, the swirler cup has an automatic cleaning function. Since the cleaning channel and the coating channel are separated, the coating is saved, the frequency of manual cleaning is reduced, and the labor intensity is lowered.

[0020] According to the technical solution provided by the embodiment of the present application, a mixer is built into the first coating channel of the coating tube, so that the main agent and the auxiliary agent of the two-component coating can be mixed inside the swirler cup; mixing inside the cup shortens the working cycle on the one hand and reduces waste of coating. Since the two components are only mixed inside the coating tube, even if the cleaning is not timely and the coating solidifies inside the coating tube, as long as the coating tube is replaced, it can avoid the solidified coating from damaging the valve island, micro-valve and mixer at the front end of the swirler cup, that is, the entire swirler cup will not be damaged; in addition, if the coating tube is made of stainless steel, even if the coating solidifies inside, it can be repaired and dredged by heating or other mechanical methods. Description of the Drawings

[0021] By reading the detailed description of the non-restrictive embodiments with reference to the following drawings, other features, objects and advantages of the present application will become more obvious:

[0022] Figure 1 Schematic diagram of the structure of the coating pipe provided in the first embodiment of the present application;

[0023] Figure 2 Schematic diagram of the connection structure between the coating pipe in the swirler cup and the nozzle provided in the second embodiment of the present application;

[0024] Figure 3 Schematic diagram of the structure of the nozzle in the second embodiment of the present application;

[0025] Figure 4 Schematic diagram of the connection structure between the coating pipe in the swirler cup and the nozzle provided in the third embodiment of the present application;

[0026] Figure 5 Schematic diagram of the internal installation structure of the swirler cup provided in the fourth embodiment of the present application;

[0027] Figure 6 External structure diagram of the coating pipe and the nozzle in the fourth embodiment;

[0028] Figure 7 External structure diagram of the coating pipe base in the fourth embodiment.

[0029] Reference numerals in the figure: 10, coating pipe; 11, first coating channel; 12, first cleaning channel; 21, second coating channel; 22, second cleaning channel; 20, nozzle; 23, nozzle seat; 24, spout pipe; 25, conical connection part; 22-1, main cleaning channel; 22-2, inner cleaning channel; 22-3, outer cleaning channel; 26, wrench opening; 30, coating mixer; 40, sealing skeleton; 50, motor seat; 60, motor; 70, motor locking pin; 13, coating pipe base; 80, conductive copper column; 61, motor main shaft; 14-1, exhaust hole; 14, annular platform; 14-2, exhaust groove; 62, annular groove; 16, screw hole; 17, guiding hole; 90, locking pin. Detailed implementation manners

[0030] The present application will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the related invention, rather than limiting the invention. Additionally, it should be noted that for the convenience of description, only the parts related to the invention are shown in the drawings.

[0031] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application will be described in detail below with reference to the drawings and embodiments.

[0032] Embodiment 1:

[0033] Please refer to Figure 1, this embodiment provides a coating pipe 10, in which a first coating channel 11 and a first cleaning channel 12 are provided; the first coating channel 11 and the first cleaning channel 12 penetrate through both ends of the coating pipe 10 and are independently arranged respectively. The coating pipe in this embodiment is applied to the swirler cup of an atomizing spraying device and is installed in the hollow main shaft of the motor of the swirler cup; the coating pipe provided by this embodiment provides an independent cleaning channel for the cleaning of the swirler cup.

[0034] Embodiment Two:

[0035] This embodiment provides a swirler cup, as Figure 2 shown, a coating delivery structure is installed in the swirler cup, and the coating delivery structure includes the coating pipe 10 in Embodiment 1, and a nozzle 20 installed at one end of the coating pipe 10; a second coating channel 21 communicating with the first coating channel 11 and a second cleaning channel 22 communicating with the first cleaning channel 12 are provided in the nozzle 20;

[0036] As Figure 3 shown, the nozzle 20 includes a nozzle seat 23, a nozzle pipe 24, and a conical connecting part 25 connecting the nozzle seat 23 and the nozzle pipe 24; the second cleaning channel 22 includes a main cleaning channel 22-1, an inner cleaning channel 22-2, and an outer cleaning channel 22-3 with interconnected inner cavities; the main cleaning channel 22-1 communicates with the first cleaning channel 11; the inner cleaning channel 22-2 communicates with the top end of the main cleaning channel 22-1; the outer cleaning channel 22-3 is connected to the side wall of the main cleaning channel 22-1 and exits from the side top of the nozzle seat 23. When cleaning is required after spraying, the cleaning solvent enters the main cleaning channel 22-1 of the nozzle 20 from the first cleaning channel 12 of the coating pipe 10, and then enters the nozzle through the inner cleaning channel 22-2 and the outer cleaning channel 22-3. A part of the cleaning agent is sprayed out from the inner cleaning channel 22-2 for cleaning the inner wall of the cup head of the swirler cup. Another part of the solvent is sprayed out from the outer cleaning channel 22-3 for cleaning the outer wall of the cup head of the swirler cup.

[0037] In order to make the external cleaning more thorough, the included angle range between the axis of the main cleaning channel 22-1 and the axis of the first coating channel 11 is 15° - 20°, preferably 17°; the included angle range between the axis of the outer cleaning channel 22-3 and the axis of the first coating channel 11 is 40° - 50°, preferably 45°.

[0038] In order to avoid coating backflow, the conical connecting part 25 adopts an inverted cone structure, and the cone angle range of the conical connecting part 25 is 25° - 35° cone angle, preferably 30 degrees.

[0039] When cleaning the inner wall of the cup head, in order to make the cleaning of the inner wall of the cup head more thorough, the cleaning solvent sprayed from the inner cleaning channel 22-2 should be more evenly distributed by the splash guard in the rotary cup. Therefore, the inner cleaning channel 22-2 should have a certain ejection angle, which can be between 3° and 8°, and the preferred ejection angle is 4°; that is, the included angle range between the inner cleaning channel 22-2 and the central axis of the coating pipe 10 is 3°-8°, preferably 4°.

[0040] Therefore, in this embodiment, when cleaning the rotary cup, the cleaning solvent can clean the cup head of the rotary cup without passing through the first coating channel 11 and the second coating channel 21; in the case of not needing to change the color, the rotary cup has an automatic cleaning function. Since the cleaning channel and the coating channel are separated, the coating is saved, the frequency of manual cleaning is reduced, and the labor intensity is lowered.

[0041] In this embodiment, the nozzle 20 is threadedly connected to the coating pipe 10; a wrench opening 26 is provided outside the nozzle; the wrench opening 26 can facilitate the installation or removal of the nozzle 20 from the coating pipe 10.

[0042] Embodiment Three

[0043] As Figure 4 shown, on the basis of Embodiment Two, a coating mixer 30 is installed in the coating pipe 10 of the rotary cup provided in this embodiment. Specifically, the coating mixer 30 is installed in the first coating channel. The main agent and the auxiliary agent of the two-component coating can be mixed inside the rotary cup; on the one hand, the mixing inside the cup shortens the working cycle and reduces the waste of coating. Since the two components are only mixed in the coating pipe, even if the cleaning is not timely and the coating solidifies inside the coating pipe 10, as long as the coating pipe 10 is replaced, it can avoid the damage of the valve island, micro-valve and mixer at the front end of the rotary cup by the solidified coating, that is, the situation of the entire rotary cup being damaged will not occur; in addition, if the coating pipe 10 is made of stainless steel, even if the coating solidifies inside, it can be repaired and dredged by heating or other mechanical methods.

[0044] As Figure 4 shown, two sealing rings 18 are used at the inlet of the coating pipe to separate the first coating channel 11 and the first cleaning channel 12; an inner sealing ring 19-1 and an outer sealing ring 19-2 are used to isolate between the coating pipe 10 and the nozzle 20.

[0045] In this embodiment, a sealing skeleton 40 is further installed between the first coating channel 11 and the nozzle 20. Since the nozzle 20 and the coating pipe 10 adopt a detachable connection structure, the coating mixer 30 can be removed from the coating pipe 10 by first removing the nozzle 20 and then removing the sealing skeleton, and the disassembly and assembly are convenient.

[0046] The sealing skeleton 40 facilitates the removal of the paint mixer 30 from the paint pipe 10. When the mixer 30 needs to be replaced, the sealing skeleton 40 can be removed first and then replaced. If the paint solidifies in the paint pipe 10, the paint pipe 10 needs to be removed, and the seal 18 at the end of the paint pipe is removed. Depending on the solidification situation of the paint, a punch or heating method is used to remove the solidified paint.

[0047] Embodiment 4:

[0048] As Figures 5 to 7 shown, on the basis of Embodiment 2, one end of the paint pipe 10 of the rotary cup away from the nozzle 20 is provided with a paint pipe base 13; the rotary cup further includes a motor base 50 and a motor 60 installed on the motor base 50; the paint pipe base 13 is located between the motor 60 and the motor base 50; the paint pipe base 13 is fixed to the motor base 50 by screws, and the motor 60 is fixed to the motor base 50 by a motor locking pin 70; the motor base 50 and the paint pipe base 13 are also electrically connected by a conductive copper column 80; preferably, a conductive bead 15 is press-fitted at the bottom end of the paint pipe base 13. After the paint pipe 10 is installed, the conductive bead 15 presses against the conductive pad of the motor base 50, and the motor base 50 is electrically connected to the paint pipe 50, that is, the motor base 50 is electrically connected to the paint pipe base 13 through the conductive copper column 80 and the conductive bead 15 at the same time, and the high-voltage static electricity on the motor base 50 is conducted to the paint pipe 10; the paint pipe 10 and the nozzle 20 are located inside the hollow motor main shaft 61; a cup head is fixed to the end of the motor main shaft 61, and a distribution disk is installed inside the cup head. The motor main shaft 61 drives the cup head and the distribution disk to rotate at high speed.

[0049] A conductive annular platform 14 surrounding the paint pipe is provided in the middle of the paint pipe base 13; an exhaust hole 14-1 is also radially provided on the annular platform 14; preferably, the outer ring surface bottom of the annular platform 14 is radially concave to form an exhaust groove 14-2 communicating with the exhaust hole 14-1 for exhausting the bearing suspension air of the motor 60; an annular groove 62 for inserting the annular platform 14 is provided at the end of the motor 60; the outer ring surface of the annular groove 62 is in interference fit with the outer ring surface of the annular platform 14, so that the paint pipe can transfer the high-voltage static electricity to the motor 60 through the annular platform 14. In this embodiment, the motor 60 is a turbine motor. The motor 60 transfers the high-voltage static electricity to the cup head, and the motor 60 drives the cup head to rotate at high speed. The paint is centrifugally atomized at the cup head and at the same time carries high-voltage static electricity.

[0050] The paint pipe base 13 is provided with communication ports corresponding to the first cleaning channel 12 and the first paint channel 11. A Y-shaped connecting pipe is connected to the outside of the paint pipe base 13 corresponding to the first paint channel 12 for introducing two kinds of paints through the two input ports of the Y-shaped pipe and then entering the first paint channel 11 at the same time for mixing.

[0051] The base 13 of the coating pipe is locked into the motor base 50 by stainless steel socket head cap screws, and the stainless steel screws are sunk in the screw holes 16.

[0052] According to the technical solution provided by the embodiment of the present application, corresponding guiding holes 17 are radially provided on the side wall of the annular groove 62 and the annular table. After passing through the side wall of the motor base 50, the locking pin 90 sequentially passes through the guiding holes 17 of the annular groove 62 and the annular table 14. On the one hand, the guiding hole 17 is used to guide the motor locking pin 90 to lock the main shaft of the motor 50, and on the other hand, it plays a role in fixing the motor locking pin 90, which can prevent the motor locking pin 90 from laterally pressing the motor base 50 and thus prevent the motor base 50 from being crushed and damaged.

[0053] In this embodiment, the coating is transported from the motor base 50 to the coating pipe 10, and is transported to the second coating channel 21 of the nozzle 20 through the first coating channel 11, and then is sprayed from the nozzle of the second coating channel 21 to the distribution plate of the cup head. After passing through the distribution plate, the coating is thrown onto the inner wall of the cup head. The cup head drives the coating to rotate at high speed, and under the action of centrifugal force, it quickly separates from the inner wall of the cup head. The cup head drives the coating to rotate at high speed, and under the action of centrifugal force, it quickly separates from the cup head and atomizes into fine coating particles. When only the cup head needs to be cleaned without changing the color, the cleaning solvent enters the first cleaning channel 12 from the motor base 50, and then enters the second cleaning channel 22 of the nozzle 20; the inner wall and the outer wall of the cup head are respectively cleaned by the cleaning solvent sprayed from the inner cleaning channel and the outer cleaning channel.

[0054] In the third aspect, the present application provides an atomizing spraying device equipped with any one of the above-mentioned swivel cups.

[0055] The above description is only a preferred embodiment of the present application and an explanation of the applied technical principle. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solution formed by the specific combination of the above technical features, and should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the technical solutions formed by mutually replacing the above features with the technical features (but not limited to) having similar functions disclosed in the present application.

Claims

1. A rotary cup, characterized in that, It includes a coating pipe and a nozzle installed at one end of the coating pipe; the coating pipe and the nozzle are of a split structure; A first coating channel and a first cleaning channel are provided inside the coating pipe; the first coating channel and the first cleaning channel penetrate through both ends of the coating pipe and are independently arranged respectively; a coating mixer is installed in the first coating channel to mix the main agent and the auxiliary agent of the two-component coating inside the spinning cup; since the two components are only mixed inside the coating pipe, even if the cleaning is not timely and the coating solidifies inside the coating pipe, only the coating pipe needs to be replaced, avoiding the damage of the valve island, micro-valve and mixer at the front end of the spinning cup by the solidified coating; The coating pipe is made of stainless steel, and after the coating solidifies inside, it is repaired and dredged by heating or mechanical methods; A second coating channel communicating with the first coating channel and a second cleaning channel communicating with the first cleaning channel are provided inside the nozzle; The nozzle includes a nozzle base, a nozzle pipe and a conical connecting part connecting the nozzle base and the nozzle pipe; the conical connecting part adopts an inverted cone structure; the second cleaning channel includes a main cleaning channel, an inner cleaning channel and an outer cleaning channel with interconnected inner cavities; the main cleaning channel communicates with the first cleaning channel; the inner cleaning channel communicates with the top end of the main cleaning channel; the outer cleaning channel is connected to the side wall of the main cleaning channel and leads out from the side top of the nozzle base; the included angle range between the axis of the main cleaning channel and the axis of the first coating channel is 15°-19°; the included angle range between the axis of the outer cleaning channel and the axis of the first coating channel is 40°-50°; the cone angle range of the conical connecting part is 25°-35°; A coating pipe base is provided at one end of the coating pipe far from the nozzle; the spinning cup further includes a motor base and a motor installed on the motor base; the coating pipe base is located between the motor and the motor base; the coating pipe base is fixed on the motor base by screws, and the motor is fixed on the motor base by a motor locking pin; the motor base and the coating pipe base are also electrically connected by a conductive copper column; the coating pipe and the nozzle are located inside the hollow motor main shaft; a cup head is fixed at the end of the motor main shaft, and a distribution plate is installed inside the cup head; A conductive annular platform surrounding the coating pipe is provided in the middle of the coating pipe base; exhaust holes are radially opened on the annular platform, and an exhaust groove communicating with the exhaust holes is formed by radially concave bottom of the outer ring surface of the annular platform; an annular groove for inserting the annular platform is provided at the end of the motor; the outer ring surface of the annular groove is in interference fit with the outer ring surface of the annular platform.

2. The rotary cup according to claim 1, characterized in that, A sealing skeleton is also installed between the first coating channel and the nozzle.

3. The rotary cup according to claim 1, characterized in that, The nozzle is threadedly connected to the coating pipe; a wrench opening is provided outside the nozzle.

4. The rotary cup according to claim 1, characterized in that, The end of the coating pipe base connected to the motor base is also in interference connection with a conductive bead.

5. The rotary cup according to claim 1, characterized in that, Corresponding guiding holes are radially opened on the side wall of the annular groove and the annular platform, and the locking pin passes through the side wall of the motor base and then passes through the guiding holes of the annular groove and the annular platform in sequence.

6. An atomizing spraying device equipped with the rotary cup according to any one of claims 1-5.

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