CN110201822B

CN110201822B - Paint spraying manipulator

Info

Publication number: CN110201822B
Application number: CN201910441845.7A
Authority: CN
Inventors: 朱文杰
Original assignee: Zhejiang New Nuobei Home Furnishing Co ltd
Current assignee: ZHEJIANG NEW NUOBEI HOME FURNISHING Co.,Ltd.
Priority date: 2019-05-24
Filing date: 2019-05-24
Publication date: 2021-02-19
Anticipated expiration: 2039-05-24
Also published as: CN112827706A; CN110201822A

Abstract

The invention discloses a paint spraying manipulator, which structurally comprises a rail, a rotary table, a paint box, a base, a first joint arm, a second joint arm, a third joint arm and a multicolor paint spraying device, wherein the multicolor paint spraying device consists of a paint color joint ring, a limiting slide rail, a support and a spray head, and the paint spraying manipulator has the following effects: multicolor paint spraying apparatus is through making the paint color festival ring rotate, let the butt joint head that the ring front end was equipped with be connected with the shower nozzle one by one, every butt joint head corresponds and is connected with a paint case, the paint colour of every paint incasement portion storage is inconsistent, is connected with the shower nozzle through the butt joint head of difference, changes the colour that sprays paint to this solves the problem that current spraying robot can not spray multiple colour chromatography product, thereby improves the paint spraying efficiency of chromatography product.

Description

Paint spraying manipulator

Technical Field

The invention relates to the field of manipulators, in particular to a paint spraying manipulator.

Background

The paint spraying robot is an industrial robot capable of automatically spraying paint or other coatings, the paint spraying robot mainly comprises a robot body, a computer and a corresponding control system, can flexibly move, adopts a flexible wrist at the wrist part of the advanced paint spraying robot, can be bent towards all directions and rotated, acts like the wrist of a human, can conveniently extend into a workpiece through a small hole to spray the inner surface of the workpiece, has the working efficiency of one to three times that of manual spraying, can effectively reduce the investment of labor cost, can replace manual spraying, can reduce the harm of toxic gas generated in the spraying process to a human body and reduce the recurrence of spraying occupational diseases, but the existing spraying robot can not spray multi-color chromatography products, and needs to replace a workshop to spray when spraying multi-color products, frequent workshop spraying of changing, it is long consuming time, and improved the probability that the non-drying paint of product surface contacts with the dust to reduce the whole quality of product, consequently need develop a neotype paint spraying manipulator, can not spray the problem of multiple colour chromatography product with this solution current spraying robot.

Summary of the invention

Aiming at the defects of the prior art, the invention is realized by the following technical scheme: the utility model provides a paint spraying manipulator, its structure includes track, revolving stage, paint can, base, first articulated arm, second articulated arm, third articulated arm, polychrome paint spraying apparatus, the central point at revolving stage top put and be equipped with the base, base and revolving stage adopt interference fit, revolving stage bottom be equipped with the track, revolving stage and track adopt sliding fit, the base top be equipped with first articulated arm and the two swing joint, first articulated arm top be equipped with second articulated arm and the two swing joint, second articulated arm front end be equipped with third articulated arm and the two swing joint, third articulated arm front end be equipped with polychrome paint spraying apparatus, the revolving stage rear end be equipped with the paint can more than two, paint can and polychrome paint spraying apparatus connect.

As a further optimization of the technical scheme, the multicolor paint spraying device comprises a paint color joint ring, a limiting slide rail, a support and a spray nozzle, wherein the spray nozzle is arranged at the center of the front end of the support, the limiting slide rail is arranged at the rear end of the support and sleeved on the paint color joint ring, and the paint color joint ring and the limiting slide rail are in sliding fit.

As the further optimization of this technical scheme, paint color joint ring constitute by ring, butt joint pipe head, support, axle sleeve, the even equidistance of ring front end be equipped with the butt joint pipe head more than two, the perpendicular gomphosis in butt joint pipe head bottom fix on the notch of ring, the central point of ring inner circle put and be equipped with the axle sleeve, axle sleeve and ring between be equipped with the support more than two, ring and axle sleeve pass through the leg joint, support and butt joint pipe head bottom connect.

As a further optimization of the technical scheme, the bracket comprises an overflow paint joint, a paint pipe, a paint liquid output bracket and a support rod, wherein the overflow paint joint is embedded and installed at the rear end of the circular ring and is connected with the butt joint pipe joint, the center of the bottom of the overflow paint joint is provided with the support rod, one end of the support rod is connected with the overflow paint joint, the other end of the support rod is connected with the shaft sleeve, the center of the front end of the support rod is provided with the paint liquid output bracket, the paint liquid output bracket is connected with the paint box, the paint pipe is arranged on two sides of the support rod, and the paint liquid output bracket is connected with the overflow paint joint through the paint pipe.

As a further optimization of the technical scheme, the spray head comprises a miniature air pump, a paint feeding base body, a ball nozzle support and a ball nozzle, the paint feeding base body is embedded and installed on a notch at the front end of the support, miniature air pumps are arranged on the upper side and the lower side of the paint feeding base body, the miniature air pumps are vertically installed on grooves in the outer wall of the paint feeding base body, the ball nozzle support is arranged at the center of the front end of the paint feeding base body, and the ball nozzle is arranged at the center of the front end of the ball nozzle support.

As a further optimization of the technical scheme, the paint feeding base body consists of a branch pipe, a closed sliding cover, an air pipe, a positioning pipe, a pressure cavity, a spring and a base body, wherein the base body is internally provided with the pressure cavity, the pressure cavity and the base body are of an integrated structure, the positioning pipe is arranged at the center position of the front end of the pressure cavity, the positioning pipe is embedded and fixed on the base body, the air pipe is arranged on the upper side and the lower side of the positioning pipe, the air pipe is connected with the pressure cavity, the air pipe is connected with a micro air pump, the rear end of the positioning pipe is provided with the branch pipe, the branch pipe is in sliding fit with the positioning pipe, the closed sliding cover is arranged in the pressure cavity, the closed sliding cover is in sliding fit with the pressure cavity, the front end of the branch pipe penetrates through the center position of the closed sliding cover and is in interference fit with, the front end and the rear end of the spring are respectively fixed on the rear end of the closed sliding cover and the inner wall of the pressure cavity.

As a further optimization of the technical scheme, the front end of the branch pipe is provided with an inwards concave rubber ring, and the pipe diameter of the branch pipe is slightly larger than that of the butt joint pipe head.

Advantageous effects

The paint spraying mechanical arm is reasonable in design and strong in functionality, and has the following beneficial effects:

the paint color regulating ring is of a circular structure, the center of the inner ring is provided with a shaft sleeve, the shaft sleeve is connected with a motor shaft, the motor shaft generates driving torque through a motor and can drive the paint color regulating ring to rotate along a limiting slide rail, and six butt joint pipe heads arranged at the front end can be connected with a spray head one by one;

each butt joint pipe head is correspondingly connected with one support, and each support is correspondingly connected with one paint box through a paint liquid output support, because the color of paint stored in each paint box is different, when the paint color adjusting ring rotates, the butt joint pipe heads arranged at the front end of the circular ring are connected with the spray head one by one, the paint in the corresponding paint box is conveyed to the spray head through the pressurization of the conveying pump, and the color of the sprayed paint is changed;

according to the invention, each butt joint pipe head and the branch pipe in the spray head can be accurately kept on the same horizontal line in the rotation process of the circular ring, air is filled into the pressure cavity, the sliding cover is closed under the influence of air pressure to drive the branch pipe to move forwards, the branch pipe and the butt joint pipe head can be butted, the concave rubber ring is arranged at the front end of the branch pipe, the connection between the branch pipe and the butt joint pipe head can be more closely attached, and the paint is prevented from overflowing from a gap in the paint spraying process;

according to the multicolor paint spraying device, the paint color regulating ring rotates, the butt joint pipe heads arranged at the front end of the circular ring are connected with the spray heads one by one, each butt joint pipe head is correspondingly connected with one paint box, the colors of the paints stored in each paint box are different, and the colors of the sprayed paints are changed by connecting different butt joint pipe heads with the spray heads, so that the problem that the existing spraying robot cannot spray multi-color chromatography products is solved, and the paint spraying efficiency of the chromatography products is improved.

Drawings

Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:

FIG. 1 is a schematic structural view of a paint spraying robot according to the present invention;

FIG. 2 is a schematic front view of the multi-color painting apparatus of the present invention;

FIG. 3 is a schematic front view of a lacquer color pitch ring according to the present invention;

FIG. 4 is a schematic top view of the stand of the present invention;

FIG. 5 is a schematic side view of a showerhead of the present invention;

FIG. 6 is a schematic cross-sectional view of a substrate being painted according to the present invention.

In the figure: the paint spraying device comprises a rail-1, a rotary table-2, a paint box-3, a base-4, a first articulated arm-5, a second articulated arm-6, a third articulated arm-7, a multicolor paint spraying device-8, a paint color articulated ring-81, a circular ring-81 a, a butt joint pipe joint-81 b, a bracket-81 c, a paint overflow joint-81 c1, a paint pipe-81 c2, a paint liquid output bracket-81 c3, a supporting rod-81 c4, a shaft sleeve-81 d, a limiting sliding rail-82, a support-83, a spray head-84, a micro air pump-84 a, a paint inlet base-84 b, a branch pipe-84 b1, a closed sliding cover-84 b2, an air pipe-84 b3, a positioning pipe-84 b4, a pressure cavity-84 b5, a spring-84 b6, a base-84 b7, a ball nozzle support-84 c, a multi-color spray nozzle support-, Ball-end nozzle-84 d.

Detailed Description

In order to make the technical means, the original characteristics, the achieved purposes and the effects of the invention easy to understand, the following description and the accompanying drawings further illustrate the preferred embodiments of the invention.

Examples

Referring to fig. 1-6, the present invention provides an embodiment of a paint spraying robot;

referring to fig. 1, a paint spraying manipulator structurally comprises a rail 1, a turntable 2, paint boxes 3, a base 4, a first joint arm 5, a second joint arm 6, a third joint arm 7 and a multicolor paint spraying device 8, wherein the base 4 is arranged at the center of the top of the turntable 2, the base 4 and the turntable 2 are in interference fit, the rail 1 is arranged at the bottom of the turntable 2, the turntable 2 and the rail 1 are in sliding fit, the first joint arm 5 is arranged at the top end of the base 4 and movably connected with each other, the second joint arm 6 is arranged at the top end of the first joint arm 5 and movably connected with each other, the third joint arm 7 is arranged at the front end of the second joint arm 6 and movably connected with each other, the multicolor paint spraying device 8 is arranged at the front end of the third joint arm 7, six paint boxes 3 are arranged at the rear end of the turntable 2, and the paint boxes 3 are connected with the multicolor paint spraying device 8, the color of the paint stored in each paint box 3 is not consistent.

Referring to fig. 2, the multicolor paint spraying apparatus 8 comprises a paint color adjusting ring 81, a limiting slide rail 82, a support 83 and a spray head 84, the spray head 84 is arranged at the center of the front end of the support 83, the limiting slide rail 82 is arranged at the rear end of the support 83, the limiting slide rail 82 is of an arc structure, the limiting slide rail 82 is sleeved on the paint color adjusting ring 81, and the paint color adjusting ring 81 and the limiting slide rail 82 are in sliding fit.

Referring to fig. 3, the paint color adjusting ring 81 is composed of a circular ring 81a, two butt joint pipe joints 81b, a bracket 81c and a shaft sleeve 81d, wherein six butt joint pipe joints 81b are uniformly arranged at the front end of the circular ring 81a at equal intervals, each butt joint pipe joint 81b surrounds the circular ring 81a to form a circular wall structure, the bottom ends of the butt joint pipe joints 81b are vertically embedded and fixed on a notch of the circular ring 81a, the shaft sleeve 81d is arranged at the center position of the inner ring of the circular ring 81a, six brackets 81c are arranged between the shaft sleeve 81d and the circular ring 81a, the circular ring 81a and the shaft sleeve 81d are connected through the bracket 81c, the bracket 81c and the bottom ends of the butt joint pipe joints 81b are connected, the shaft sleeve 81d is connected with a motor shaft, and a motor shaft generates a driving torque through a motor, so as to drive the circular ring 81a to rotate.

Referring to fig. 4, the bracket 81c is composed of a paint overflow joint 81c1, a paint pipe 81c2, a paint liquid output bracket 81c3 and a support rod 81c4, the paint overflow joint 81c1 is embedded and installed at the rear end of the circular ring 81a and is connected with the butt joint pipe joint 81b, a support rod 81c4 is arranged at the center of the bottom of the paint overflow joint 81c1, one end of the support rod 81c4 is connected with the paint overflow joint 81c1, the other end of the support rod 81c4 is connected with a shaft sleeve 81d, a paint liquid output bracket 81c3 is arranged at the center of the front end of the support rod 81c4, the paint liquid output bracket 81c3 is connected with the paint box 3, paint pipes 81c2 are arranged at two sides of the support rod 81c4, and the paint liquid output bracket 81c3 and the paint overflow joint 81c1 are connected through the paint pipes 81c 2.

Referring to fig. 5, the nozzle 84 is composed of a micro air pump 84a, a paint inlet base 84b, a ball nozzle support 84c and a ball nozzle 84d, the paint inlet base 84b is embedded in a notch at the front end of the support 83, the micro air pump 84a is arranged on the upper side and the lower side of the paint inlet base 84b, the micro air pump 84a is vertically arranged on a groove in the outer wall of the paint inlet base 84b, the ball nozzle support 84c is arranged at the center of the front end of the paint inlet base 84b, and the ball nozzle 84d is arranged at the center of the front end of the ball nozzle support 84 c.

Referring to fig. 6, the paint feeding base body 84b is composed of a branch tube 84b1, a closed sliding cover 84b2, an air tube 84b3, a positioning tube 84b4, a pressure chamber 84b5, a spring 84b6 and a base body 84b7, the base body 84b7 is a hollow cylindrical structure and is internally provided with a pressure chamber 84b5, the pressure chamber 84b5 is a cylindrical structure and is integrated with the base body 84b7, the center of the front end of the pressure chamber 84b5 is provided with a positioning tube 84b4, the positioning tube 84b4 is embedded and fixed on the base body 84b7, the upper side and the lower side of the positioning tube 84b4 are provided with an air tube 84b3 and are in an axial symmetry structure, the air tube 84b3 is connected with the pressure chamber 84b5, the air tube 84b 367 is connected with a micro air pump 84a, the rear end of the positioning tube 84b4 is provided with a branch tube 84b1, the branch tube 1 is matched with the hollow tube 1 and the positioning tube 36874, the pressure chamber 84b5 is internally provided with a closed sliding cover 84b2, the closed sliding cover 84b2 is of a circular structure and is in sliding fit with the pressure chamber 84b5, the front end of the branch pipe 84b1 penetrates through the center of the closed sliding cover 84b2 and is in interference fit with the closed sliding cover 84b2, the rear end of the closed sliding cover 84b2 is uniformly and equidistantly provided with more than two springs 84b6, the springs 84b6 and the branch pipes 84b1 are parallel to each other, the front end and the rear end of the springs 84b6 are respectively fixed on the rear end of the closed sliding cover 84b2 and the inner wall of the pressure chamber 84b5, the front end of the branch pipe 84b1 is provided with a concave rubber ring, and the pipe diameter of the branch pipe 84b1 is slightly larger than.

The specific realization principle is as follows:

because the multi-color paint spraying device 8 is installed at the front end of the third joint arm 7, the paint color joint ring 81 is of a circular structure, the central position of the inner ring is provided with a shaft sleeve 81d, the shaft sleeve 81d is connected with a motor shaft, the motor shaft generates driving torque through the motor so as to drive the paint color joint ring 81 to rotate along a limit slide rail 82, because the front end of the circular ring 81a is uniformly provided with six butt joint pipe heads 81b at equal intervals, each butt joint pipe head 81b is correspondingly connected with one support 81c, each support 81c is connected with a paint inlet hose through a paint liquid output support 81c3 and is correspondingly connected with one paint box 3, because the colors of the paint stored in each paint box 3 are different, when the motor drives the paint color joint ring 81 to rotate through the motor shaft, when the butt joint pipe heads 81b arranged at the front end of the circular ring 81a are connected with the spray nozzles 84 one by one, the paint in the corresponding paint box 3 is pressurized through, the color of the paint is changed by conveying the paint to the spray head 84, the color of the paint is changed, the circular ring 81a can keep each butt joint 81b and the branch pipe 84b1 on the same horizontal line accurately in the rotating process through calculation driving of the control system, at the moment, the micro air pump 84a works and injects air into the pressure cavity 84b5 through the air pipe 84b3, the closed sliding cover 84b2 is affected by air pressure to drive the branch pipe 84b1 to move forwards, the front end of the branch pipe 84b1 is connected with the sleeved butt joint 81b, at the moment, the spring 84b6 is stressed and compressed to deform, after the air in the pressure cavity 84b5 is exhausted, the spring 84b6 is rapidly reset, the branch pipe 84b1 is driven to be compressed towards the positioning pipe 84b4 through the closed sliding cover 84b2, the branch pipe 84b1 is separated from the butt joint 81b, because the front end of the branch pipe 84b1 is provided with an internally concave rubber ring, the connection of the branch pipe 84b1 and the butt joint 81b can be more, prevent to spill over from the gap at the in-process paint that sprays paint, polychrome paint spraying apparatus 8 rotates through making paint color festival ring 81, let the butt joint 81b that the ring 81a front end was equipped with be connected with shower nozzle 84 one by one, every butt joint 81b corresponds and is connected with a paint can 3, the paint color of the inside storage of every paint can 3 is inconsistent, be connected with shower nozzle 84 through different butt joint 81b, change the colour that sprays paint, solve the problem that current spraying robot can not spray multiple colour chromatography product with this, thereby improve the paint spraying efficiency of chromatography product.

While there have been shown and described what are at present considered the fundamental principles of the invention, the essential features and advantages thereof, it will be understood by those skilled in the art that the present invention is not limited by the embodiments described above, which are merely illustrative of the principles of the invention, but rather, is capable of numerous changes and modifications in various forms without departing from the spirit or essential characteristics thereof, and it is intended that the invention be limited not by the foregoing descriptions, but rather by the appended claims and their equivalents.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. The utility model provides a paint spraying manipulator, its structure includes track (1), revolving stage (2), paint box (3), base (4), first articulated arm (5), second articulated arm (6), third articulated arm (7), polychrome paint spraying apparatus (8), its characterized in that: the top of the rotary table (2) is provided with a base (4), the bottom of the rotary table (2) is provided with a track (1), the top end of the base (4) is provided with a first joint arm (5), the top end of the first joint arm (5) is provided with a second joint arm (6), the front end of the second joint arm (6) is provided with a third joint arm (7), the front end of the third joint arm (7) is provided with a multicolor paint spraying device (8), and the rear end of the rotary table (2) is provided with a paint box (3); the multi-color paint spraying device (8) consists of a paint color adjusting ring (81), a limiting slide rail (82), a support (83) and a spray head (84), wherein the spray head (84) is arranged at the front end of the support (83), the limiting slide rail (82) is arranged at the rear end of the support (83), the limiting slide rail (82) is sleeved on the paint color adjusting ring (81), and the paint color adjusting ring (81) is in sliding fit with the limiting slide rail (82); the paint color adjusting ring (81) consists of a circular ring (81a), butt joint pipe heads (81b), a support (81c) and a shaft sleeve (81d), the butt joint pipe heads (81b) are arranged at the front end of the circular ring (81a), the shaft sleeve (81d) is arranged on the inner ring of the circular ring (81a), the support (81c) is arranged between the shaft sleeve (81d) and the circular ring (81a), and the support (81c) is connected with the butt joint pipe heads (81 b); the bracket (81c) consists of a paint overflow joint (81c1), a paint pipe (81c2), a paint liquid output bracket (81c3) and a support rod (81c4), the paint overflow joint (81c1) is embedded and arranged at the rear end of the circular ring (81a) and is connected with the butt joint head (81b), a supporting rod (81c4) is arranged at the center of the bottom of the paint overflow joint (81c1), one end of the supporting rod (81c4) is connected with the paint overflow joint (81c1), the other end of the supporting rod (81c4) is connected with a shaft sleeve (81d), a lacquer liquid output bracket (81c3) is arranged at the center of the front end of the supporting rod (81c4), the paint liquid output bracket (81c3) is connected with the paint box (3), paint pipes (81c2) are arranged on two sides of the supporting rod (81c4), the paint liquid output bracket (81c3) is connected with the paint overflow joint (81c1) through a paint pipe (81c 2); the paint sprayer is characterized in that the spray head (84) consists of a micro air pump (84a), a paint inlet base body (84b), a ball nozzle support (84c) and a ball nozzle (84d), the paint inlet base body (84b) is embedded and installed on a notch at the front end of the support (83), the micro air pump (84a) is arranged on the upper side and the lower side of the paint inlet base body (84b), the micro air pump (84a) is vertically installed on a groove in the outer wall of the paint inlet base body (84b), the ball nozzle support (84c) is arranged in the center of the front end of the paint inlet base body (84b), and the ball nozzle (84d) is arranged in the center of the front end of the ball nozzle support (84 c); the paint feeding base body (84b) consists of a branch pipe (84b1), a closed sliding cover (84b2), an air pipe (84b3), a positioning pipe (84b4), a pressure cavity (84b5), a spring (84b6) and a base body (84b7), wherein the base body (84b7) is of a hollow cylindrical structure, the pressure cavity (84b5) is arranged in the base body, the pressure cavity (84b 588) is of a cylindrical structure and is integrated with the base body (84b7), the positioning pipe (84b4) is arranged at the center of the front end of the pressure cavity (84b 42), the positioning pipe (84b4) is embedded and fixed on the base body (84b7), the air pipe (84b3) is arranged on the upper side and the lower side of the positioning pipe (84b4) and is of an axial symmetry structure, the air pipe (84b3) is connected with the pressure cavity (84b5), the air pipe (84b5) is connected with a micro air pump (84a), and the positioning pipe (57324) is arranged on the rear end of the positioning pipe (84b4), the branch pipe (84b1) is in sliding fit with the positioning pipe (84b4), the branch pipe (84b1) and the positioning pipe (84b4) are both hollow cylindrical structures, a closed sliding cover (84b2) is arranged inside the pressure cavity (84b5), the closed sliding cover (84b2) has a circular structure and is in sliding fit with the pressure cavity (84b5), the front end of the branch pipe (84b1) penetrates through the center of the closed sliding cover (84b2) and is in interference fit with the closed sliding cover, the rear end of the closed sliding cover (84b2) is uniformly provided with more than two springs (84b6) at equal intervals, the spring (84b6) and the branch pipe (84b1) are parallel to each other, the front end and the rear end of the spring (84b6) are respectively fixed on the rear end of the closed sliding cover (84b2) and the inner wall of the pressure cavity (84b5), the front end of the branch pipe (84b1) is provided with an inwards concave rubber ring, and the pipe diameter of the branch pipe (84b1) is slightly larger than that of the butt joint pipe head (81 b);

because the multicolor paint spraying device (8) is arranged at the front end of the third joint arm (7), the paint color joint ring (81) is of a circular structure, the center of the inner ring is provided with a shaft sleeve (81d), the shaft sleeve (81d) is connected with the motor shaft, so that the paint color joint ring (81) is driven to rotate along the limiting slide rail (82), because the front end of the circular ring (81a) is uniformly and equidistantly provided with six butt joint pipe heads (81b), each butt joint pipe head (81b) is correspondingly connected with one bracket (81c), each bracket (81c) is connected with a paint inlet hose through a paint liquid output bracket (81c3) and is correspondingly connected with one paint box (3), because the colors of the paint stored in each paint box (3) are different, when the motor drives the paint color joint ring (81) to rotate through the motor shaft, when the butt joint pipe heads (81b) arranged at the front end of the circular ring (81a) are connected with the spray heads (84) one by one, paint corresponding to the interior of the paint box (3) is conveyed to the spray head (84) through pressurization of the conveying pump, each butt joint pipe head (81b) and the branch pipe (84b1) can be accurately kept on the same horizontal line in the rotating process of the circular ring (81a), the micro air pump (84a) works at the moment, air is filled into the pressure cavity (84b5) through the air pipe (84b3), the closed sliding cover (84b2) is influenced by air pressure, the branch pipe (84b1) is driven to move forwards, the front end of the branch pipe (84b1) is connected with the butt joint pipe head (81b), the spring (84b6) is stressed to compress and deform the pressure cavity, after the air in the pressure cavity (84b5) is exhausted, the spring (84b6) rapidly resets and the branch pipe (84b1) is driven to compress towards the interior of the positioning pipe (84b4) through the closed sliding cover (84b2), and the branch pipe head (84b1) and is separated from the butt joint pipe head (81b), because the front end of the branch pipe (84b1) is provided with the concave rubber ring, the connection between the branch pipe (84b1) and the butt joint pipe head (81b) can be more closely attached, the multicolor paint spraying device (8) enables the paint color adjusting ring (81) to rotate, the butt joint pipe heads (81b) arranged at the front end of the circular ring (81a) are connected with the spray head (84) one by one, each butt joint pipe head (81b) is correspondingly connected with one paint box (3), the paint colors stored in each paint box (3) are inconsistent, and the butt joint pipe heads (81b) are connected with the spray head (84) through different butt joint pipe heads, so that the problem that the existing spraying robot cannot spray multiple-color chromatography products is solved.