CN117443634A - Spraying mechanism for realizing high-frequency accurate positioning and spraying system applied by same - Google Patents

Abstract

The invention discloses a spraying mechanism for realizing high-frequency accurate positioning, which is suitable for a spraying machine, wherein a plurality of automatic spray guns are arranged in the spraying machine and are used for coating spraying liquid to materials; a shielding device is arranged below the automatic spray gun and used for collecting redundant spraying liquid sprayed out of the automatic spray gun; the shielding device moves periodically; the shielding device comprises a left liquid-absorbing cotton and a right liquid-absorbing cotton, an extrusion device is respectively arranged below two sides of the shielding device, and when the shielding device periodically moves, the two extrusion devices extrude the corresponding liquid-absorbing cotton in a staggered mode. The spraying mechanism realizing high-frequency accurate positioning and the spraying system applied by the spraying mechanism are mutually matched with the shielding device and the extrusion device, so that redundant spraying liquid can be recovered, and the utilization rate of the spraying liquid is greatly improved; no matter the material is conveyed under the condition of strong continuity or non-continuity, the spraying mechanism does not need to keep the automatic spray gun in a normally open state, and compared with the traditional spraying machine, the spraying liquid can be greatly saved.

Description

Spraying mechanism for realizing high-frequency accurate positioning and spraying system applied by same

Technical Field

The invention relates to the technical field of food processing, in particular to a spraying mechanism for realizing high-frequency accurate positioning and a spraying system applied by the same.

Background

The spraying machine is a special coating device adopting spraying technology, and the principle is that the air flow is controlled to instantly push the air distribution reversing device to reverse, so that the piston of the pneumatic motor can perform stable and continuous reciprocating motion. The sucked paint is pressurized, the paint is conveyed into a spray gun of the spraying machine through a high-pressure hose, and the paint is instantly atomized by the spray gun and then released to the surface of a coated object. The spraying machine mainly comprises a feeding device, a spray gun and an atomization generation source, and in the food industry, the surfaces of some foods such as steamed bread, bread and the like need to be coated with grease to form a coating, and if the spraying machine is applied to food spraying, the manual coating can be replaced.

In the use of the spraying machine, the spraying gun sprays food materials conveyed on the conveying belt, for discontinuous spraying materials on the conveying belt, the switch of the spraying gun is required to be controlled according to the condition of the feeding materials of the conveying belt, in different production enterprises, such as workshops with higher production efficiency like biscuit production, the continuity of the materials conveyed on the conveying belt is stronger, in order to ensure that each material can be sprayed, the spraying gun needs to be kept at a high frequency, and the spraying gun is easy to quickly wear due to frequent switching of the spraying gun, and a spraying system is damaged, if the spraying gun is kept in a normally open state, a large amount of spraying liquid is wasted.

Disclosure of Invention

The invention aims to solve the defects in the prior art, and provides a spraying mechanism for realizing high-frequency accurate positioning and a spraying system applied by the spraying mechanism.

In order to achieve the above purpose, the present invention adopts the following technical scheme: the spraying mechanism is suitable for a spraying machine, a plurality of automatic spray guns are arranged in the spraying machine, and the automatic spray guns are used for coating spraying liquid to materials; a shielding device is arranged below the automatic spray gun and is used for collecting redundant spraying liquid sprayed out of the automatic spray gun; the shielding device moves periodically; the shielding device comprises a left liquid-absorbing cotton and a right liquid-absorbing cotton, wherein an extrusion device is arranged below two sides of the shielding device respectively, and when the shielding device periodically moves, the two extrusion devices extrude the corresponding liquid-absorbing cotton in a staggered mode.

As a further description of the above technical solution: the shielding device comprises a liquid receiving box, a liquid storage cavity is formed in the liquid receiving box, a first liquid pumping connector is arranged in the liquid receiving box, and the first liquid pumping connector is used for pumping spraying liquid in the liquid storage cavity.

As a further description of the above technical solution: the liquid storage cavity is provided with a left shielding base and a right shielding base, liquid absorbing cotton is arranged in the shielding base, an upper cover plate is fixed on the shielding base through bolts, and the liquid absorbing cotton is extruded at the upper cover plate.

As a further description of the above technical solution: the liquid collecting box is provided with a bottom hole, one part of spraying liquid extruded in the liquid absorbing cotton flows out of the bottom hole, and the other part flows into the liquid storage cavity from the flow guiding hole.

As a further description of the above technical solution: a compensation space is reserved between the liquid absorbing cotton and the shielding base.

As a further description of the above technical solution: the extrusion device comprises an extrusion block, wherein the extrusion block is provided with an extrusion part, and the extrusion part passes through the bottom hole to extrude the liquid-absorbing cotton.

As a further description of the above technical solution: the extrusion piece is offered a plurality of and is collected hole and a plurality of drainage hole, and a plurality of the collection hole is located on the extrusion portion, a plurality of the drainage hole is located around the extrusion portion, the drainage hole is right the spraying liquid that the extrusion portion outer wall flowed down is drained.

As a further description of the above technical solution: the extrusion block is fixedly provided with a liquid suction bin through a bolt, and the liquid suction bin is used for storing spraying liquid flowing down from the collecting hole and the drainage hole.

A spraying system using the spraying mechanism capable of realizing high-frequency accurate positioning comprises a sensor and a plurality of spraying mechanisms, wherein the sensor is used for generating a control signal when materials enter a spraying area, and the spraying mechanisms start a spraying program to spray the materials based on the control signal.

As a further description of the above technical solution: and generating a time length from the end of the signal through the sensor signal, and converting the opening time length of the automatic spray gun.

The technical scheme has the following advantages or beneficial effects:

1. according to the invention, the shielding device and the extrusion device are mutually matched, so that redundant spraying liquid can be recovered, and the utilization rate of the spraying liquid is greatly improved.

2. In the invention, the customizable size of the spray hole in the shielding device not only can shield redundant spraying liquid and avoid the spraying liquid from polluting a conveying belt for conveying materials, but also has low requirements on the size, shape and type of the conveying belt, is not limited to the arrangement form of the conveying belt, reduces the manufacturing cost of the spraying machine and ensures that the adaptation degree of a spraying mechanism is higher.

3. According to the invention, the sensor monitors the material, the automatic spray gun is regulated to be opened and closed at a specific time through the signal of the sensor, and the opening time of the automatic spray gun can be regulated, so that the material can be accurately positioned.

4. According to the invention, for discontinuous materials on the conveyer belt, the opening of the automatic spray guns 1 can be regulated according to the feeding condition, so that a plurality of automatic spray guns 1 are opened irregularly and discontinuously, and the effective spraying of the spraying liquid is realized.

5. According to the invention, for the materials with higher production efficiency, the continuity of the materials on the conveyor belt is stronger, the automatic spray guns can be used for alternately spraying through the cooperation between the plurality of spraying mechanisms and the sensors, the spraying frequency of each automatic spray gun can be reduced under the condition of maintaining high-frequency spraying of the materials, the abrasion of the automatic spray gun is reduced, and the spraying system is better maintained.

6. In the invention, no matter the material is conveyed in a strong or discontinuous state, the spraying mechanism does not need to keep the automatic spray gun in a normally open state, and compared with the traditional spraying machine, the spraying liquid can be greatly saved.

Drawings

FIG. 1 is a schematic illustration of a spray coating system according to the present invention;

FIG. 2 is a top view of a spray coating system according to the present invention;

FIG. 3 is a schematic view of a spray mechanism for achieving high frequency precision positioning in accordance with the present invention;

FIG. 4 is an exploded view of a spray mechanism embodying the present invention for achieving high frequency accurate positioning;

FIG. 5 is a schematic view of the shielding device of FIG. 3;

FIG. 6 is a bottom view of the liquid receiving box of FIG. 5;

FIG. 7 is a bottom view of the occlusion base of FIG. 5;

FIG. 8 is a schematic view of the extrusion apparatus of FIG. 3;

fig. 9 is a schematic view of the liquid suction cartridge of fig. 8;

FIG. 10 is a bottom view of the extrusion block of FIG. 8;

fig. 11 is a schematic view of a movement trace of a liquid receiving box in a spray coating system according to another embodiment.

Legend description:

1. an automatic spray gun; 2. a rodless cylinder; 3. a shielding device; 31. a mounting plate; 32. a liquid receiving box; 321. a liquid storage cavity; 322. a first liquid extraction joint; 323. a bottom hole; 33. a reinforcing plate; 34. a shielding base; 341. a deflector aperture; 35. an upper cover plate; 351. a first nozzle hole; 36. liquid-absorbing cotton; 361. a second nozzle hole; 37. compensating space; 4. an extrusion device; 41. a double-rod cylinder; 42. a connecting block; 43. a liquid suction bin; 431. a liquid hole; 432. a second liquid extraction joint; 44. extruding a block; 441. an extrusion part; 442. a collection hole; 443. drainage holes; 5. a sensor.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Referring to fig. 1, one embodiment provided by the present invention: the utility model provides a realize spraying mechanism of accurate location of high frequency, be applicable to the flush coater, set up a plurality of automatic spray gun 1 in the flush coater, automatic spray gun 1 sets up two in this embodiment, automatic spray gun 1 fixes in the flush coater, automatic spray gun 1 external holding spray liquid's head tank, automatic spray gun 1 is used for to the material coating spray liquid, the material includes but is not limited to steamed bun, bread and biscuit, spray liquid is edible oil, edible oil is sprayed on the material surface through automatic spray gun 1, form one deck coating.

Referring to fig. 1-2, a shielding device 3 is arranged below the automatic spray gun 1, and the shielding device 3 is used for collecting excessive spraying liquid sprayed by the automatic spray gun 1.

Wherein, shelter from device 3 and connect rodless cylinder 2, rodless cylinder 2 fixes in the flush coater, drives the reciprocating motion about shelter from device 3 through rodless cylinder 2, makes shelter from device 3 carry out periodic movement, specifically shelter from device 3 first right side, automatic spray gun 1 from shelter from behind the downward spraying material of device 3 left part, shelter from device 3 left side, automatic spray gun 1 from shelter from device 3 right part downward spraying again, this is a cycle of moving of shelter from device 3.

Specifically, referring to fig. 3-5, the shielding device 3 includes a liquid receiving box 32, the liquid receiving box 32 is fixed on a mounting plate 31 by bolts, the mounting plate 31 is fixed in a rodless cylinder 2 by bolts, a reinforcing plate 33 is further arranged at the joint of the mounting plate 31 and the liquid receiving box 32, the liquid receiving box 32 and the mounting plate 31 can be more tightly connected by bolts through the reinforcing plate 33, and meanwhile, stress concentration of the liquid receiving box 32 at the position of the bolts connected with the mounting plate 31 is avoided, the reinforcing plate 33 balances stress, and deformation of the liquid receiving box 32 in a hanging state is relieved.

Referring to fig. 5-7, a liquid storage cavity 321 is disposed in the liquid receiving box 32, a first liquid suction connector 322 is disposed at one side of the liquid receiving box 32, the first liquid suction connector 322 is externally connected with a pump head for extracting spraying liquid in the liquid storage cavity 321, the liquid storage cavity 321 is provided with a left shielding base 34 and a right shielding base 34, the shielding bases 34 are fixed on the liquid receiving box 32 through bolts, liquid absorbing cotton 36 is disposed in each shielding base 34, a second spraying hole 361 is disposed on the liquid absorbing cotton 36, an upper cover plate 35 is fixed on the shielding base 34 through bolts, a first spraying hole 351 is disposed on the upper cover plate 35, when a material conveyed by a conveying belt moves below the liquid receiving box 32 (the material and a spraying head of the automatic spraying gun 1 are located in the same vertical plane), the automatic spraying gun 1 sprays the material, the spraying liquid passes through the first spraying hole 351 and the second spraying hole 361, and since the liquid sprayed by the automatic spraying gun 1 falls in a fan shape, the spraying liquid can not be sprayed from the spraying holes, the part exceeding the spraying hole is redundant spraying liquid, part is sprayed in the liquid collecting in the cavity 321, and the other part is absorbed by the liquid absorbing cotton 36.

In order to prevent the spraying liquid from being sprayed on the surface of the conveying belt, the sizes of the first spraying holes 351 and the second spraying holes 361 can be designed by combining the shapes and sizes of materials, so that the spraying liquid passing through the spraying holes is just coated on the surface of the materials, the spraying liquid sprayed on the conveying belt is reduced, the surface of the conveying belt is kept clean, the conveying belt can be a conveying device arranged in a spraying machine or a structure in an external conveyor, the shielding device 3 has the customization of the sizes of the spraying holes, the conveying belt can be prevented from being polluted, and the shielding device is irrelevant to the parameters such as the sizes, the shapes and the types of the conveying belt, so that the spraying mechanism can be applied to different conveyors, the conveying belt is not limited to being arranged in the spraying machine, and the manufacturing cost of the spraying machine can be reduced while the adaptation degree of the spraying mechanism is improved.

The spraying liquid collected in the liquid storage cavity 321 and the spraying liquid absorbed by the liquid suction cotton 36 need to be recycled, the liquid in the liquid storage cavity 321 can be extracted through the first liquid suction connector 322, the liquid suction cotton 36 needs to be extruded to discharge liquid, and the absorbing capacity of the liquid suction cotton 36 can be recovered while the spraying liquid is recycled.

When the liquid suction cotton 36 extrudes liquid, the extrusion mode is from bottom to top, the liquid suction cotton 36 is extruded at the upper cover plate 35, the upper cover plate 35 plays a supporting role, the liquid suction cotton 36 is prevented from being separated from the shielding base 34, a compensation space 37 is reserved between the liquid suction cotton 36 and the shielding base 34, deformation can be generated when the liquid suction cotton 36 is extruded, the compensation space 37 provides a deformation interval for the deformation of the liquid suction cotton 36, and the liquid suction cotton 36 is prevented from being damaged due to strong extrusion with the side wall of the shielding base 34 when the liquid suction cotton 36 is deformed.

The baffle base 34 is provided with the diversion holes 341 around, the liquid receiving box 32 is provided with the bottom hole 323, the cross section outline of the bottom hole 323 is smaller than that of the liquid absorbing cotton 36 and larger than that of the second spray hole 361, so that the liquid absorbing cotton 36 can be stably placed in the liquid receiving box 32, is not easy to fall from the bottom hole 323, and does not influence the spraying of the spraying liquid from the second spray hole 361 when the automatic spray gun 1 sprays materials.

When the absorbent cotton 36 is extruded, a part of the extruded spraying liquid flows out from the bottom hole 323, and the other part flows into the liquid storage cavity 321 from the flow guide hole 341, and the spraying liquid flowing into the liquid storage cavity 321 is extracted and recovered through the first liquid extraction connector 322.

Referring to fig. 3, a pressing device 4 is disposed below each of two sides of the shielding device 3, and when the shielding device 3 periodically moves, the two pressing devices 4 alternately press the corresponding absorbent cotton 36.

Specifically, referring to fig. 8-10, the extruding device 4 includes an extruding block 44, the extruding block 44 is provided with an extruding part 441, the extruding part 441 passes through a bottom hole 323 to extrude the absorbent cotton 36, the extruding block 44 is provided with a plurality of collecting holes 442 and a plurality of drainage holes 443, the plurality of collecting holes 442 are located on the extruding part 441, the plurality of drainage holes 443 are located around the extruding part 441, the drainage holes 443 drain the spraying liquid flowing down from the outer wall of the extruding part 441, the extruding block 44 is fixed with an absorbent bin 43 through bolts, the absorbent bin 43 is used for storing the spraying liquid flowing down from the collecting holes 442 and the drainage holes 443, the inner wall of the absorbent bin 43 is conical, the concentrated inflow of the spraying liquid into the liquid holes 431 is facilitated, the absorbent bin 43 is fixedly provided with a connecting block 42, the connecting block 42 is connected with a double-rod cylinder 41, the double-rod cylinder 41 is fixed in the sprayer, a groove adapted to the second liquid suction connector 432 is formed at the top of the connecting block 42, and the second liquid suction connector 432 is suspended in the groove, so that the second liquid suction connector 432 is conveniently connected with an external pump.

It can be appreciated that the compensating space 37 can make a part of the spraying liquid extruded by the absorbent cotton 36 flow out from the compensating space, and flow down along the outer wall of the extruding portion 441, so as to avoid that the spraying liquid is extruded from the flow guiding hole 341 to the outside due to pressure surge when the absorbent cotton 36 is extruded, the speed of the sprayed liquid is high, and the sprayed liquid is easy to impact with the inner wall of the liquid receiving box 32, so that splashing is generated, and the splashed spraying liquid permeates into structural gaps in the spraying machine to easily cause mechanical damage.

In this embodiment, the dual-rod cylinder 41 drives the connection block 42 to move upwards, the connection block 42 drives the liquid suction bin 43 and the extrusion block 44 to move upwards, the extrusion part 441 extrudes the liquid suction cotton 36 through the bottom hole 323, a part of the spraying liquid extruded by the liquid suction cotton 36 flows out of the bottom hole 323, the other part flows into the liquid storage cavity 321 from the flow guide hole 341, the spraying liquid flowing out of the bottom hole 323 enters the liquid suction bin 43 from the collecting hole 442 and the flow guide hole 443, and the liquid stored in the liquid suction bin 43 is extracted and recovered through the second liquid extraction joint 432.

In this application, when the material is carried to automatic spray gun 1 below along with the conveyer belt, automatic spray gun 1 sprays the spraying liquid to the material surface, when spraying liquid passes first orifice 351 and second orifice 361, unnecessary spraying liquid is collected by imbibition cotton 36 and stock solution chamber 321, after the spraying is accomplished, extrusion piece 44 extrudes imbibition cotton 36, the spraying liquid that extrudes flows into in receiving box 32 and the imbibition storehouse 43, rethread first drawing liquid joint 322 and second drawing liquid joint 432 are taken out the spraying liquid in receiving box 32 and the imbibition storehouse 43 respectively and are retrieved, thereby make the utilization ratio of spraying liquid higher, reduce extravagant.

In another embodiment, referring to fig. 2, a spraying system using a spraying mechanism for realizing high-frequency accurate positioning includes a sensor 5 and a plurality of spraying mechanisms, the sensor 5 is externally connected with a PLC control system, the sensor 5 is used for generating a control signal when a material enters a spraying area, and the spraying mechanism starts a spraying program to spray the material based on the control signal.

In this application, referring to fig. 2 and 11, for materials with strong continuity such as biscuits conveyed on a conveyor belt, at least two spraying mechanisms are required to be sprayed at high frequency, in this embodiment, the number of spraying mechanisms is two, the two spraying mechanisms are located in the area a and the area b (refer to fig. 2) oppositely along the front-back direction, the spraying process and the moving state of the two spraying mechanisms are simplified to be shown in fig. 11, specifically, after the materials are monitored by a sensor 5, a rodless cylinder 2 drives an area a liquid receiving box 32 to move to the rightmost end, an area a automatic spraying gun 1 faces a second spray hole 361 on the left side of the area a liquid receiving box 32, the first material is conveyed to the lower part of the area a automatic spraying gun 1, the area a automatic spraying gun 1 sprays spraying liquid to the first material (the area b automatic spraying gun 1 does not work), the spraying liquid passes through the second spray hole 361 on the left side of the area a to be coated on the surface of the material, the material is discharged after the spraying is finished, the liquid receiving box 32 on the area a moves to the leftmost end, the liquid receiving box 32 on the area b moves to the rightmost end, the left extrusion block 44 on the area a extrudes the left liquid absorbing cotton 36, the material II is positioned below the automatic spray gun 1 on the area b (meanwhile, the material III is positioned below the automatic spray gun 1 on the area a), the spraying liquid in the automatic spray gun 1 on the surface of the material II passes through the second spray hole 361 on the left side to be coated on the surface of the material II (the automatic spray gun 1 on the area a is not operated), after the spraying is finished, the liquid receiving box 32 on the leftmost end on the area b, the left extrusion block 44 on the area b extrudes the left liquid absorbing cotton 36, meanwhile, the liquid receiving box 32 on the area a keeps static, the automatic spray gun 1 on the area a sprays the material III through the second spray hole 361 on the right side (the automatic spray gun 1 on the area b is not operated), the material II and the material III are discharged after the spraying is finished, the material four moves to the lower part of the automatic spray gun 1 in the area b, the material five moves to the lower part of the automatic spray gun 1 in the area a, the liquid receiving box 32 in the area b is kept static, the spraying liquid in the automatic spray gun 1 in the area b passes through the second spray hole 361 on the right side to spray the material four (the automatic spray gun 1 in the area a does not work), the liquid receiving box 32 in the area a moves to the rightmost end, the liquid absorbing cotton 36 on the right side is extruded by the extruding block 44 in the area a, and the movement period is circularly carried out in the material spraying process.

The time (T1) of arrival of the material is detected in real time by the sensor 5, and the time (T2) of arrival of the material below the automatic spray guns 1 is calculated by combining the running speed (V) of the conveyor belt and the distance (S) between the sensor 5 and each automatic spray gun 1 to determine the opening time (T3) of the automatic spray guns, that is, t2=s/V, t3=t1+t2.

In each movement period, the automatic spray guns 1 in the area a and the automatic spray guns 1 in the area b alternately spray, the time length (t 1) of the signal end is generated through the signal of the sensor 5, and the opening time length (t 2) of each automatic spray gun 1 is calculated, namely, the opening time length of the automatic spray gun 1 is equal to the time length (t1=t2) of the signal maintenance of the sensor 5.

In this embodiment, for the discontinuous material on the conveyor belt, the opening of the automatic spray guns 1 can be adjusted according to the incoming material condition, so that a plurality of automatic spray guns 1 are opened irregularly and discontinuously, effective spraying of the spraying liquid is realized, waste of the spraying liquid is prevented, for the material with higher production efficiency, the continuous material on the conveyor belt is stronger, the automatic spray guns 1 can be alternately sprayed through the cooperation between a plurality of spraying mechanisms and the sensors 5, the spraying frequency of each automatic spray gun 1 can be reduced under the condition of maintaining high-frequency spraying of the material, the abrasion of the automatic spray guns 1 is reduced, and the spraying system is better maintained; the automatic spray gun 1 does not need to be kept in a normally open state, and compared with a traditional spraying machine, the spraying liquid can be greatly saved.

In addition, the sensor 5 monitors the material, and the automatic spray gun 1 is adjusted to be opened and closed at specific time through the signal of the sensor 5, and the opening time of the automatic spray gun 1 can be adjusted, so that the accurate positioning of the material is facilitated.

Working principle: when the material is conveyed to the lower part of the automatic spray gun 1 along with the conveying belt, the automatic spray gun 1 sprays spraying liquid on the surface of the material, when the spraying liquid passes through the first spray hole 351 and the second spray hole 361, redundant spraying liquid is collected by the liquid suction cotton 36 and the liquid storage cavity 321, after spraying is finished, the extrusion block 44 extrudes the liquid suction cotton 36, extruded spraying liquid flows into the liquid receiving box 32 and the liquid suction bin 43, and then the spraying liquid in the liquid receiving box 32 and the liquid suction bin 43 is respectively extracted and recovered through the first liquid extracting joint 322 and the second liquid extracting joint 432.

Finally, it should be noted that: the foregoing description is only illustrative of the preferred embodiments of the present invention, and although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements or changes may be made without departing from the spirit and principles of the present invention.

Claims (10)

1. Realize spraying mechanism of accurate location of high frequency, be applicable to flush coater, its characterized in that: a plurality of automatic spray guns (1) are arranged in the spraying machine, and the automatic spray guns (1) are used for coating spraying liquid to materials;

a shielding device (3) is arranged below the automatic spray gun (1), and the shielding device (3) is used for collecting redundant spraying liquid sprayed out of the automatic spray gun (1);

the shielding device (3) moves periodically;

the shielding device (3) comprises a left liquid-absorbing cotton (36) and a right liquid-absorbing cotton (36), an extrusion device (4) is arranged below two sides of the shielding device (3), and when the shielding device (3) periodically moves, the two extrusion devices (4) are used for extruding the corresponding liquid-absorbing cotton (36) in a staggered mode.

2. The spraying mechanism for realizing high-frequency accurate positioning according to claim 1, wherein: the shielding device (3) comprises a liquid receiving box (32), a liquid storage cavity (321) is formed in the liquid receiving box (32), a first liquid pumping connector (322) is arranged in the liquid receiving box (32), and the first liquid pumping connector (322) is used for pumping spraying liquid in the liquid storage cavity (321).

3. The spraying mechanism for realizing high-frequency accurate positioning according to claim 2, wherein: the liquid storage cavity (321) is provided with a left shielding base (34) and a right shielding base (34), liquid absorbing cotton (36) is arranged in the shielding base (34), an upper cover plate (35) is fixed on the shielding base (34) through bolts, and the liquid absorbing cotton (36) is extruded at the upper cover plate (35).

4. A spray mechanism for achieving high frequency precision positioning as claimed in claim 3, wherein: the liquid collecting box is characterized in that diversion holes (341) are formed in the periphery of the shielding base (34), bottom holes (323) are formed in the liquid collecting box (32), one part of spraying liquid extruded in the liquid absorbing cotton (36) flows out of the bottom holes (323), and the other part of spraying liquid flows into the liquid storage cavity (321) from the diversion holes (341).

5. A spray mechanism for achieving high frequency precision positioning as claimed in claim 3, wherein: a compensation space (37) is reserved between the liquid absorbing cotton (36) and the shielding base (34).

6. The spraying mechanism for achieving high-frequency accurate positioning according to claim 4, wherein: the extrusion device (4) comprises an extrusion block (44), wherein the extrusion block (44) is provided with an extrusion part (441), and the extrusion part (441) penetrates through the bottom hole (323) to extrude the liquid-absorbing cotton (36).

7. The spraying mechanism for achieving high-frequency accurate positioning according to claim 6, wherein: the extrusion block (44) is provided with a plurality of collecting holes (442) and a plurality of drainage holes (443), the collecting holes (442) are positioned on the extrusion part (441), the drainage holes (443) are positioned around the extrusion part (441), and the drainage holes (443) drain the spraying liquid flowing down from the outer wall of the extrusion part (441).

8. The spray mechanism for achieving high-frequency accurate positioning according to claim 7, wherein: the extrusion block (44) is fixedly provided with a liquid suction bin (43) through a bolt, and the liquid suction bin (43) is used for storing spraying liquid flowing down from the collecting hole (442) and the drainage hole (443).

9. A spray coating system employing the spray coating mechanism of any one of claims 1-8 to achieve high frequency precision positioning, characterized in that: the spraying device comprises a sensor (5) and a plurality of spraying mechanisms, wherein the sensor (5) is used for generating a control signal when materials enter a spraying area, and the spraying mechanisms start a spraying program to spray the materials based on the control signal.

10. A spray coating system as set forth in claim 9 wherein: and generating a signal and ending the signal time through the sensor (5), and converting the opening time of the automatic spray gun (1).