阅读说明：本技术 一种静电喷枪 (Electrostatic spray gun ) 是由 姚昕 周志诚 沈锦祎 陆文超 盛继光 潘伟林 于 2020-04-30 设计创作，主要内容包括：本发明涉及一种静电喷枪,其包括喷枪主体以及设置在喷枪主体上部的激光源。喷枪主体的内部形成有供喷涂物料流经的第一通道以及供应高压气体流的第二通道,其中,高压气体流能够与物料流混合以提供喷涂所需的动力。喷枪还包括设置在喷枪主体上部的激光源,并且激光源被构造成能够使得喷枪在预定喷射距离对目标物进行喷涂操作时,所述喷涂操作在目标物上形成的喷涂区域的边界与激光源在目标物上形成的照明区域的边界基本重合。根据本发明的静电喷枪,施工人员能够清楚地判断喷涂作业过程中涂料的喷涂轨迹,因此能够有效地避免漏喷、重喷的情况出现。(The invention relates to an electrostatic spray gun, which comprises a spray gun main body and a laser source arranged on the upper part of the spray gun main body. The interior of the spray gun body is formed with a first passage through which the spray material flows and a second passage which supplies a high pressure gas stream which can mix with the material stream to provide the motive force required for spraying. The spray gun further comprises a laser source arranged on the upper part of the spray gun main body, and the laser source is configured to enable the spray gun to perform a spraying operation on a target object at a preset spraying distance, wherein the boundary of a spraying area formed on the target object by the spraying operation is basically coincident with the boundary of an illumination area formed on the target object by the laser source. According to the electrostatic spray gun disclosed by the invention, constructors can clearly judge the spraying track of the coating in the spraying operation process, so that the situations of missing spraying and re-spraying can be effectively avoided.)

1. An electrostatic spray gun, the spray gun comprising:

a spray gun body having formed therein a first passage through which a spray material flows and a second passage through which a high pressure gas stream is supplied, wherein the high pressure gas stream is capable of mixing with the material stream to provide the motive force required for spraying,

the spray gun further comprises a laser source arranged at the upper part of the spray gun main body, and the laser source is configured to enable the boundary of a spraying area formed on a target by a spraying operation to be basically coincident with the boundary of an illumination area formed on the target by the laser source when the spray gun performs the spraying operation on the target at a preset spraying distance.

2. The electrostatic spray gun of claim 1, wherein the spray gun further comprises a receiving chamber connected to the second passage, the receiving chamber is provided with an opening through which high pressure gas flows out, and the laser source is provided at the opening of the receiving chamber.

3. The electrostatic spray gun of claim 2, wherein the containment chamber has a third passage therein in communication with the second passage, the third passage being oriented to allow the high pressure gas stream to flow toward the opening.

4. The electrostatic spray gun according to claim 2 or 3, wherein the spray gun further comprises a distance measuring unit for detecting a distance between the spray gun and the target object, and an alarm unit communicably connected to the distance measuring unit, wherein the alarm unit issues an alarm when the distance measured by the distance measuring unit is less than the predetermined spray distance.

5. The electrostatic spray gun of claim 4, wherein the ranging unit is located within the containment chamber.

6. The electrostatic spray gun of claim 5 further comprising a receiving shelf removably secured to the spray gun body, the receiving shelf defining the receiving cavity.

7. The electrostatic spray gun according to claim 2, wherein the spray gun body is provided with a light guide surface at the light exit portion, which is used for adjusting an illumination direction and an illumination area of the laser source.

8. The electrostatic spray gun of claim 4, wherein the alarm unit is fixed to a top and/or rear portion of the electrostatic spray gun.

9. An electrostatic spray gun according to claim 4, wherein the spray gun comprises a separate switch for activating the distance measuring unit and/or the laser source.

10. The electrostatic spray gun of claim 9, wherein the spray gun further comprises a handle for gripping by a user, wherein the independent switch is positioned such that at least one finger of the user can turn the independent switch on or off when the user grips the handle.

11. The electrostatic spray gun of claim 4, wherein the alarm unit comprises a buzzer and/or a warning light.

Technical Field

The invention relates to the field of coating equipment, in particular to an electrostatic spray gun.

Background

Spraying is widely applied to various fields of manufacturing industry as a high-efficiency and high-quality coating method. In large-area spray applications, the trajectory (gun travel) and distance of the spray gun directly affect the final quality of the coating surface.

In the construction of current manual spraying, when constructor carried out large tracts of land spraying through the spray gun, the region of its spraying was mainly judged through self-viewing. However, there is a need to spray adjacent areas with coatings of similar or identical colors but of different material compositions. Clearly, it is difficult for a constructor to accurately spray paint onto an accurate area using an existing spray gun, and at the boundary of the adjacent areas, it is difficult for the constructor to judge whether paint having substantially the same thickness as other areas has been sprayed. In addition, when it is necessary to spray paint of the same color as that of a target area, it is also difficult for a construction worker to distinguish between sprayed and unpainted areas according to the existing spray pattern. In the two situations, constructors are easy to cause the quality problems of missed spraying, heavy spraying, orange peel and dull.

Disclosure of Invention

In view of the above situation of the spray gun in the prior art, an object of the present invention is to provide an electrostatic spray gun, which can ensure that a constructor can accurately judge a spraying track, and avoid the situations of missed spraying and heavy spraying.

This object is achieved by the electrostatic spray gun according to the invention in the following form. The spray gun comprises a spray gun body and a laser source arranged on the upper part of the spray gun body. The interior of the spray gun body is formed with a first passage through which a spray material flows and a second passage that supplies a high pressure gas stream that can mix with the material stream to provide the motive force required for spraying. The spray gun further comprises a laser source arranged on the upper part of the spray gun main body, and the laser source is configured to enable the spray gun to perform a spraying operation on a target object at a preset spraying distance, and the boundary of a spraying area formed on the target object by the spraying operation is basically coincident with the boundary of an illumination area formed on the target object by the laser source.

The laser emitted by the laser lamp source has the characteristics of directional light emission and high brightness, so that a clear boundary can be formed on a target object. After the irradiation area of the laser is adjusted to be the same as the boundary of the spraying area, a constructor can clearly judge the spraying track of the coating in the spraying operation process, so that the conditions of missing spraying and re-spraying can be effectively avoided.

According to a preferred embodiment of the invention, the spray gun further comprises a housing chamber connected to the second passage, the housing chamber being provided with an opening for the outflow of high-pressure gas, and the laser source being arranged at the opening of the housing chamber. In the spraying operation process, a part of high-pressure gas for providing spraying pressure flows out of the accommodating cavity, so that paint mist can be effectively prevented from entering the accommodating cavity in the spraying process to shield a laser lamp source and damage other equipment in the accommodating cavity.

According to a preferred embodiment of the invention, inside the containment chamber there is a third passage communicating with said second passage, said third passage being oriented so that said flow of high-pressure gas flows towards said opening.

According to a preferred embodiment of the invention, the spray gun further comprises a distance measuring unit for detecting a distance between the spray gun and the target object and an alarm unit which can be connected in communication with the distance measuring unit, wherein the alarm unit issues an alarm when the distance measured by the distance measuring unit is smaller than the predetermined spray distance. The distance measuring unit and the alarm unit can monitor and inform constructors whether the current spray gun is too close to the spraying target object or not in real time.

According to a preferred embodiment of the invention, the distance measuring unit is located in the accommodation chamber.

In accordance with a preferred embodiment of the present invention the electrostatic spray gun further includes a receiving shelf removably secured to the spray gun body, the receiving shelf defining the receiving cavity.

According to a preferred embodiment of the present invention, the spray gun body is provided with a light guide surface at the light exit portion, the light guide surface being used for adjusting an illumination direction and an illumination area of the laser light source.

According to a preferred embodiment of the invention, the alarm unit is fixed to the top and/or rear of the electrostatic spray gun.

According to a preferred embodiment of the invention, the spray gun comprises a separate switch for activating the distance measuring unit and/or the laser source.

According to a preferred embodiment of the invention, the spray gun further comprises a handle for gripping by a user, wherein the independent switch is positioned such that at least one finger of the user can turn the independent switch on or off when the user grips the handle.

According to a preferred embodiment of the invention, the alarm unit comprises a buzzer and/or a warning light.

On the basis of the common general knowledge in the field, the preferred embodiments can be combined randomly to obtain the preferred examples of the invention.

Other systems, methods, features and advantages of the invention will be or will become apparent to one with skill in the art upon examination of the following figures and detailed description. It is intended that all such additional systems, methods, features and advantages be included within this description and this summary, be within the scope of the invention, and be protected by the accompanying claims.

Drawings

For a better understanding of the above and other objects, features, advantages and functions of the present invention, reference should be made to the preferred embodiments illustrated in the accompanying drawings. Like reference numerals in the drawings refer to like parts. It will be appreciated by persons skilled in the art that the drawings are intended to illustrate preferred embodiments of the invention without any limiting effect on the scope of the invention, and that the various components in the drawings are not drawn to scale.

FIG. 1 is a schematic view of an electrostatic spray gun according to a preferred embodiment of the present invention;

fig. 2 is a schematic diagram of the operation of the electrostatic spray gun according to fig. 1.

Description of reference numerals:

1: a laser source;

2: a distance measuring probe;

3: a control unit;

4: an independent switch;

5: a power supply bin;

6: an accommodating chamber;

7: a buzzer;

8: a warning light;

9: a wire;

10: a third channel;

11: a power source;

12: a second channel;

13: a first inlet;

14: the second inlet

15: an arc-shaped portion;

16: a hose;

a: a handle;

b: a barrel for spraying;

20: an accommodating frame.

Detailed Description

The inventive concept of the present invention will be described in detail below with reference to the accompanying drawings. What has been described herein is merely a preferred embodiment in accordance with the present invention and other ways of practicing the invention will occur to those skilled in the art and are within the scope of the invention. In the following detailed description, directional terms, such as "upper", "lower", "inner", "outer", "top", "rear", and the like, are used with reference to the orientation as illustrated in the accompanying drawings. Components of embodiments of the present invention can be positioned in a number of different orientations and the directional terminology is used for purposes of illustration and is in no way limiting.

Referring to fig. 1, there is shown an electrostatic spray gun according to a preferred embodiment of the present invention, wherein a partial structure of the spray gun is shown in perspective type. As shown in fig. 1, the electrostatic spray gun includes a spray gun body and a laser source 1 disposed at an upper portion of the spray gun body. The interior of the spray gun body is formed with a first passage through which the spray material flows and a second passage 12 through which a high pressure gas stream is supplied.

The gun body is generally "7" shaped and includes a handle A for grasping by a user and a barrel B angled with respect to the handle A. The side of the handle a below the spray gun adjacent the material to be sprayed has an arcuate portion 15, the arcuate portion 15 having an internal passage. The inlet of the internal channel is directed towards the lower side of the lance and forms the first inlet 13 of the above-mentioned first channel. The outlet of the internal passage extends obliquely towards the spray material outlet of the spray gun. Preferably, the arcuate portion 15 extends for a total length preferably not greater than 80 mm. The spray gun body is provided with an inclined opening corresponding to the outlet of the arc-shaped portion 15 at a position adjacent to the spray material outlet. The oblique opening is substantially parallel to the outlet of the arcuate section 15. The diagonal opening is connected to the outlet of the arcuate portion 15 by a removable hose 16. The internal passage of the arcuate portion 15, the internal passage of the hose 16 and the angled opening together form a first passage through which the spray material flows.

The side of the underside of the handle a facing away from the spray material of the spray gun is provided with a second inlet 14 which can be connected to a source of high pressure gas. The torch body is provided with an internal flow path which passes through the grip a and the torch tube B in this order from the second inlet 14, and the flow path is formed as the second passage 12.

The first and second channels 12 intersect in the mixing chamber near the exit of the spray material. The mixing chamber has a volume which is much larger than the first and second channels 12. The high-pressure gas enters the mixing cavity at a high speed in the direction which is approximately the same as the spraying direction of the spraying material and continues to move forward to form negative pressure in the mixing cavity, so that the spraying material is sucked, the pressure and the speed of the spraying material are improved, and the spraying material is sprayed out from the spraying material outlet.

The laser light source 1 provided at the upper portion of the torch body is configured such that when the torch performs a painting operation on a target object at a predetermined spraying distance, a boundary of a painting area formed on the target object by the painting operation substantially coincides with a boundary of an illumination area formed on the target object by the laser light source 1. This can be achieved by adjusting the irradiation direction of the laser source 1, or by providing a light guide surface for adjusting the illumination direction and the illumination area of the laser source 1 at the light exit of the torch body. See fig. 2 for illustration.

The laser source 1 is preferably composed of a plurality of one-line laser lamp modules. The plurality of the line laser lamp head modules can be coordinated and matched, so that when the spray gun sprays the target object at different positions, the laser source 1 in the form can be overlapped at the boundary of an illumination area formed by the target object and a spraying area formed by the spray gun at the target object.

When spraying, the laser with directional luminescence and high brightness can illuminate the paint mist sprayed out from the spray gun, so that constructors can judge the paint mist formed by the sprayed paint mist on a target object, and the conditions of missing spraying and re-spraying are avoided.

Preferably, the laser source 1 is arranged to be color-adjustable, which can be achieved by arranging laser sources 1 of different colors, or by arranging laser sources 1 of different colors, whereby the laser sources 1 can be adapted to spray paints of different colors and objects of different colors.

To facilitate maintenance of the electrostatic spray gun of the present invention, the inner passage of the hose 16 in the first passage described above is preferably arranged to occupy more than 70% of the total length of the first passage. In this case, the extension of the arcuate portion 15 and the extension of the first passage on the barrel B are set short. For the arc-shaped portion 15, which extends for a short distance, it is therefore easy to clean. The spraying material in the section of the first passage in the gun barrel B can be brought out of the spray gun by the high-pressure gas due to the negative pressure caused by the high-pressure gas flowing through the area at high speed, so that the spraying material is not easy to remain in the section. The hose 16 is detachably fixed to the gun body, so that the hose 16 can be easily replaced by a constructor after a large amount of spraying material remains in the hose 16. Therefore, the electrostatic spray gun has no problem that the sprayed coating remains in the spray gun to influence the service life.

With further reference to FIG. 1, the spray gun body may be provided with a receiving bracket 20 removably secured to the spray gun body. The receiving frame 20 defines a receiving chamber 6 therein. The receiving bracket 20 may be secured to the upper portion of the gun body by any known means such as screws, snaps, etc. The containing cavity 6 is communicated with the second channel 12, and an outlet for high-pressure gas to flow out is arranged on one side of the spraying material outlet. The laser source 1 is arranged at the opening of the receiving chamber 6. During the spraying operation, a portion of the high-pressure gas used to provide the spraying pressure flows out of the receiving chamber 6, blowing away the paint mist near the opening of the receiving chamber 6, preventing it from entering the receiving chamber 6 and shielding the laser source 1 and damaging other equipment inside the receiving chamber 6.

Optionally, a distance measuring unit for detecting the distance between the spray gun and the target object and an alarm unit capable of being connected with the distance measuring unit in a communication mode can be further arranged in the accommodating cavity 6. Wherein the alarm unit issues an alarm when the distance measured by the distance measuring unit is less than a predetermined spray distance (e.g., less than 250 mm).

Optionally, the alarm unit can be selected from a buzzer 7 and a warning lamp 8. Referring to fig. 1, a buzzer 7 and a warning lamp 8 are optionally provided at the rear of the electrostatic spray gun. In addition, the buzzer 7 and the warning light 8 may be provided on the top of the electrostatic spray gun. According to the invention, the distance measuring unit and the alarm unit can monitor and inform constructors whether the current spray gun is too close to the spraying target object or not in real time under any complex operation environment in an acoustic and optical combined alarm mode. This can guarantee that constructor can keep the distance of spray gun and target object within appropriate distance, guarantee the homogeneity of spraying coating thickness in the coating work, and the surface finish of coating to avoid causing the condition of not good quality to appear because the coating flows and hangs. Meanwhile, the alarm unit and the warning lamp 8 can reduce the skill level requirement of the operator.

According to the invention, the distance measuring unit comprises a distance measuring probe 2 located at the opening of the accommodation chamber 6 and a control unit 3 connected to the distance measuring probe 2. The ranging probe 2 may be, for example, an infrared ranging probe 2. The control unit 3 is simultaneously used to control the laser source 1.

In the electrostatic spray gun of fig. 1, the control unit 3, the distance measuring unit and the laser source 1 are simultaneously fixed within the receiving chamber 6 of the receiving rack 20. Constructors can directly replace the containing frame 20, so that other laser sources 1 with different colors or different color combinations can be replaced, and different spraying requirements can be met.

With further reference to fig. 1, the receiving chamber 6 may preferably be provided with a third channel 10 communicating with the second channel 12. The third channel 10 is able to conduct high pressure gas to the opening of the receiving chamber 6, which may avoid impact of the high pressure gas on other components within the receiving chamber 6.

According to a preferred embodiment of the invention, the distance measuring unit, the laser source 1, can be activated or deactivated by a separate switch 4 located on the spray gun body. Preferably, the independent switch 4 is positioned such that at least one finger (e.g., thumb) of the user can turn the independent switch 4 on or off when the user grips the handle a. For example, the independent switch 4 located at the upper portion of the spray gun is located approximately at the leading edge of the spray switch in the length direction of the electrostatic spray gun.

Alternatively, the upper surface of the above-mentioned individual switch 4 may be attached with a protective film for preventing coating mist or paint coverage.

For the laser source 1 on the gun, the ranging unit, the alarm unit it can be powered by an independent power supply 11 on the gun. The wires 8 between the independent power supply 11 and the laser source 1, the distance measuring unit and the alarm unit can be arranged in the spray gun

The scope of the invention is limited only by the claims. Persons of ordinary skill in the art, having benefit of the teachings of the present invention, will readily appreciate that alternative structures to the structures disclosed herein are possible alternative embodiments, and that combinations of the disclosed embodiments may be made to create new embodiments, which also fall within the scope of the appended claims.