Self-cleaning insulating spray gun

Abstract

The utility model provides a self-cleaning insulating spray gun. The self-cleaning insulating spray gun comprises a gun body; the insulation spraying pipe is connected with the gun body and comprises a first spraying pipe and a second spraying pipe, a first flowing channel is formed in the first spraying pipe, the first spraying pipe is arranged in the second spraying pipe, a second flowing channel is formed in the first spraying pipe, and a spraying connector is arranged on the gun body; the first flow channel and the second flow channel are used for providing a spraying material into the first flow channel and providing a cleaning medium into the second flow channel respectively; the nozzle is connected with the insulating spray pipe through an adjusting part and is rotatably arranged, the adjusting part is provided with a first spraying part and a second spraying part which are correspondingly communicated with the first flowing channel and the second flowing channel respectively, the first spraying part is communicated with the nozzle, and the second spraying part is arranged towards the inner wall of the nozzle; the spraying materials are sprayed out of the nozzle through the first spraying part or the second spraying part sprays the cleaning medium to clean the nozzle, so that the problem that in the prior art, the nozzle cannot be cleaned after a spraying gun is used for a long time and sprays liquid, and consequently blockage is caused is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of electric cleaning insulating spray guns, in particular to a self-cleaning insulating spray gun. Background Art

[0002] A spray gun is a common tool that uses liquid or compressed air to quickly release power, and is used for painting, cleaning, spraying, etc. The application of the spray gun in the industry can be directly loaded with paint, that is, a simple spray gun. In the prior art, a handheld spray gun is suitable for conventional cleaning operations, such as spray painting, factory assembly lines, car washing, painting, etc. It is often used and has the characteristics of water column state adjustment and large liquid output.

[0003] However, the angle of the existing spray gun cannot be adjusted, and manual holding in one position can easily cause soreness and fatigue. After long-term use and spraying, the nozzle of the spray gun may be blocked by paint or impurities. The spray gun in the prior art cannot meet the self-cleaning function, which affects the spraying effect and work efficiency. Utility Model Content

[0004] The main purpose of the utility model is to provide a self-cleaning insulating spray gun to solve the problem that the spray gun in the prior art cannot clean the nozzle after long-term use and spraying, resulting in blockage.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a self-cleaning insulating spray gun, comprising: a gun body; an insulating nozzle, connected to the gun body, the insulating nozzle comprising a first nozzle and a second nozzle, the first nozzle having a first flow channel, the first nozzle is arranged in the second nozzle and forms a second flow channel with the inner wall of the second nozzle, and the gun body is provided with a spray interface connected to the insulating nozzle, so as to provide spray material into the first flow channel and provide cleaning medium into the second flow channel respectively; a nozzle, connected to an end of the insulating nozzle away from the gun body through an adjusting component, the nozzle is rotatably arranged, and the adjusting component is provided with a first injection part and a second injection part corresponding to the first flow channel and the second flow channel respectively, the first injection part is connected to the nozzle, and the second injection part is arranged toward the inner wall of the nozzle, so that the spray material is sprayed out from the nozzle through the first injection part or the second injection part sprays the cleaning medium to clean the nozzle.

[0006] Furthermore, a first annular groove and a second annular groove are respectively provided on the adjusting component, one end of the first nozzle is rotatably provided in the first annular groove, and one end of the second nozzle is rotatably provided in the second annular groove; wherein the diameter of the first annular groove is smaller than the diameter of the second annular groove.

[0007] Further, the second injection portion includes a plurality of cleaning parts arranged at intervals along the circumferential direction of the adjusting component, and the adjusting component is provided with a plurality of second mounting holes which are arranged one-to-one corresponding to the plurality of cleaning parts and are interconnected, the plurality of second mounting holes are connected to the second flow channel, the plurality of second mounting holes are arranged in the second annular groove and avoid the second nozzle arrangement, or the plurality of second mounting holes are arranged between the first annular groove and the second annular groove.

[0008] Further, the first injection portion includes an injection member, a first mounting hole communicating with the injection member is provided on the adjustment member, the first mounting hole is communicated with the first flow channel, and a first annular groove is provided around the first mounting hole.

[0009] Furthermore, a first matching portion is provided on the inner side wall of the first annular groove, and a second matching portion is provided on the outer side wall of the first nozzle, and the first matching portion and the second matching portion are matched and connected with each other; wherein, one of the first matching portion and the second matching portion is a protrusion, and the other of the first matching portion and the second matching portion is a groove.

[0010] Furthermore, a third matching portion is provided on the inner side wall of the second annular groove, and a fourth matching portion is provided on the outer side wall of the second nozzle, and the third matching portion and the fourth matching portion are matched and connected with each other; wherein, one of the third matching portion and the fourth matching portion is a protrusion, and the other of the third matching portion and the fourth matching portion is a groove.

[0011] Further, the length of the insulating nozzle is adjustable; and / or, the distance L1 between the outer wall surface of the first nozzle and the inner wall surface of the second nozzle satisfies: 0.5 cm ≤ L1 ≤ 1.5 cm.

[0012] Furthermore, two connecting parts are relatively arranged on one end of the nozzle close to the adjusting component, and the two connecting parts are respectively hinged to the adjusting component, so that the nozzle can be rotatably arranged relative to the adjusting component.

[0013] Furthermore, the self-cleaning insulating spray gun also includes: a protective cover, which is arranged on the nozzle, a first clamping portion is arranged on the adjusting component, and a second clamping portion is arranged inside the protective cover, so that the first clamping portion and the second clamping portion are clamped with each other after the protective cover is arranged on the nozzle; a connecting piece, which is respectively connected to the protective cover and the adjusting component, so as to pull the protective cover when the protective cover is detached from the nozzle.

[0014] Further, the protective cover is made of plastic material; and / or the connecting piece is made of elastic material.

[0015] By applying the technical scheme of the utility model, a self-cleaning insulating spray gun includes a gun body, an insulating nozzle and a nozzle; the insulating nozzle is connected to the gun body, the insulating nozzle includes a first nozzle and a second nozzle, the first nozzle has a first flow channel, the first nozzle is arranged in the second nozzle and forms a second flow channel with the inner wall of the second nozzle, and a spray interface connected to the insulating nozzle is provided on the gun body, so as to provide spray material into the first flow channel and a cleaning medium into the second flow channel respectively; the nozzle is connected to an end of the insulating nozzle away from the gun body through an adjusting component, the nozzle is rotatably arranged, and the adjusting component is provided with a first injection part and a second injection part corresponding to the first flow channel and the second flow channel respectively, the first injection part is connected to the nozzle, and the second injection part is arranged toward the inner wall of the nozzle, so that the spray material is sprayed out from the nozzle through the first injection part or the second injection part sprays the cleaning medium to clean the nozzle. In this way, the spraying material is supplied to the first flow channel in the first nozzle through the spray interface, and is sprayed out through the first injection part and the nozzle of the adjusting component. After the nozzle is used for a long time and sprays liquid, a large amount of residual spray material will accumulate on the inner wall or nozzle mouth of the nozzle, making the nozzle mouth blocked and unusable. Then, the cleaning medium is supplied to the second flow channel between the first nozzle and the second nozzle through the spray interface, and is sprayed to the inner wall and nozzle mouth of the nozzle through the second injection part to clean the accumulated residual spray material, thereby improving the working efficiency of the spraying and the service life of the product, thereby solving the problem of the spray gun in the prior art being unable to clean the nozzle after long-term use and spraying liquid, resulting in blockage. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0017] Figure 1 The figure shows the overall structure of the self-cleaning insulating spray gun according to the embodiment of the utility model;

[0018] Figure 2 A schematic diagram of the structure of the insulating nozzle and the adjusting component provided according to the embodiment of the self-cleaning insulating spray gun of the utility model is shown;

[0019] Figure 3 A first side view of an adjustment component provided according to an embodiment of the self-cleaning insulating spray gun of the utility model is shown;

[0020] Figure 4 A second side view of the adjustment component provided according to the embodiment of the self-cleaning insulating spray gun of the utility model is shown.

[0021] The above drawings include the following reference numerals:

[0022] 10. Gun body; 11. Spraying interface; 20. Insulating nozzle; 21. First nozzle; 210. First flow channel; 22. Second nozzle; 220. Second flow channel; 30. Nozzle; 40. Adjustment component; 41. First spray section; 410. Spray component; 42. Second spray section; 420. Cleaning component; 43. First annular groove; 44. Second annular groove; 45. First mounting hole; 46. Second mounting hole. DETAILED DESCRIPTION

[0023] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0024] In order to solve the problem that the spray gun in the prior art cannot clean the nozzle after long-term use and spraying, resulting in blockage, the utility model provides a self-cleaning insulating spray gun.

[0025] Please refer to Figures 1 to 4 As shown, applying the technical solution of the utility model, the self-cleaning insulating spray gun includes a gun body 10, an insulating nozzle 20 and a nozzle 30; the insulating nozzle 20 is connected to the gun body 10, and the insulating nozzle 20 includes a first nozzle 21 and a second nozzle 22. The first nozzle 21 has a first flow channel 210, and the first nozzle 21 is arranged in the second nozzle 22 and forms a second flow channel 220 with the inner wall of the second nozzle 22. The gun body 10 is provided with a spray interface 11 connected with the insulating nozzle 20, so as to provide spraying materials into the first flow channel 210 and to the second flow channel 220 respectively. A cleaning medium is provided in the movable channel 220; the nozzle 30 is connected to the end of the insulating nozzle 20 away from the gun body 10 through the adjusting component 40, the nozzle 30 is rotatably arranged, and the adjusting component 40 is provided with a first injection part 41 and a second injection part 42 which are respectively connected to the first flow channel 210 and the second flow channel 220. The first injection part 41 is connected to the nozzle 30, and the second injection part 42 is arranged toward the inner wall of the nozzle 30, so that the spraying material is sprayed out from the nozzle 30 through the first injection part 41 or the second injection part 42 sprays the cleaning medium to clean the nozzle 30.

[0026] By applying the technical solution of this embodiment, the spraying material is supplied to the first flow channel 210 in the first nozzle 21 through the spraying interface 11, and is sprayed out through the first injection part 41 of the adjusting component 40 and the nozzle 30. After the nozzle 30 is used for a long time and sprays liquid, a large amount of residual spray material will accumulate on the inner wall of the nozzle 30 or the nozzle 30 mouth of the nozzle 30, so that the nozzle 30 mouth is blocked and cannot be used. Then, the cleaning medium is supplied to the second flow channel 220 between the first nozzle 21 and the second nozzle 22 through the spraying interface 11, and is sprayed to the inner wall of the nozzle 30 and the nozzle 30 mouth through the second injection part 42 to clean the accumulated residual spray material, thereby improving the working efficiency of the spraying and the service life of the product, thereby solving the problem of the spray gun in the prior art that the nozzle 30 cannot be cleaned after long-term use and spraying, resulting in blockage.

[0027] In this embodiment, the spraying material is insulating spray paint.

[0028] like Figure 3 and Figure 4 As shown, the adjusting component 40 is provided with a first annular groove 43 and a second annular groove 44, one end of the first nozzle 21 is rotatably disposed in the first annular groove 43, and one end of the second nozzle 22 is rotatably disposed in the second annular groove 44; wherein the diameter of the first annular groove 43 is smaller than the diameter of the second annular groove 44. In the above arrangement, the first annular groove 43 and the second annular groove 44 are arranged concentrically, so that the adjusting component 40 is connected to the first nozzle 21 and the second nozzle 22 respectively and communicates with the first flow channel 210 and the second flow channel 220, so that the spraying interface 11 can transport the spraying material and the cleaning medium into the first flow channel 210 and the second flow channel 220 respectively.

[0029] Specifically, the second spraying part 42 includes a plurality of cleaning parts 420 arranged at intervals along the circumferential direction of the adjusting component 40, and the adjusting component 40 is provided with a plurality of second mounting holes 46 arranged one-to-one corresponding to the plurality of cleaning parts 420 and connected to each other, and the plurality of second mounting holes 46 are connected to the second flow channel 220, and the plurality of second mounting holes 46 are arranged in the second annular groove 44 and avoid the second nozzle 22, or the plurality of second mounting holes 46 are arranged between the first annular groove 43 and the second annular groove 44. In this way, the cleaning medium in the second flow channel 220 can flow into the plurality of cleaning parts 420 through the plurality of second mounting holes 46 on the adjusting component 40, and be sprayed toward the inner wall of the nozzle 30 and the nozzle 30 port through the plurality of cleaning parts 420, so as to clean a large amount of residual materials, prevent the nozzle 30 port from being blocked and affecting the normal use of the spray gun, and improve the working efficiency.

[0030] Optionally, in this embodiment, the cleaning member 420 may be a columnar structure or a plurality of structures having different bending sections and facing different areas in the nozzle 30 , so that the cleaning member 420 can spray and clean the inner wall of the nozzle 30 at multiple angles.

[0031] Specifically, the first injection part 41 includes an injection member 410, and a first mounting hole 45 communicating with the injection member 410 is provided on the adjustment member 40, the first mounting hole 45 is communicated with the first flow channel 210, and the first annular groove 43 is arranged around the first mounting hole 45. With the above arrangement, the nozzle of the injection member 410 is arranged corresponding to the nozzle 30 of the nozzle 30, so that the spraying material located in the first flow channel 210 can flow into the injection member 410 through the first mounting hole 45 on the adjustment member 40, and be sprayed out through the injection member 410 and the nozzle 30.

[0032] In this embodiment, a first matching portion is provided on the inner wall of the first annular groove 43, and a second matching portion is provided on the outer wall of the first nozzle 21, and the first matching portion and the second matching portion are matched and connected with each other; wherein, one of the first matching portion and the second matching portion is a protrusion, and the other of the first matching portion and the second matching portion is a groove.

[0033] In this embodiment, a third matching portion is provided on the inner wall of the second annular groove 44, and a fourth matching portion is provided on the outer wall of the second nozzle 22, and the third matching portion and the fourth matching portion are matched and connected with each other; wherein, one of the third matching portion and the fourth matching portion is a protrusion, and the other of the third matching portion and the fourth matching portion is a groove.

[0034] It can be seen that the first nozzle 21 is engaged and clamped with the first fitting portion in the first annular groove 43 of the adjusting component 40 through the second fitting portion thereon, and a sealing structure is arranged between the first fitting portion and the second fitting portion, so that the adjusting component 40 is tightly fitted and connected to the first nozzle 21 and the spraying material in the first flow channel 210 is prevented from leaking; the second nozzle 22 is engaged and clamped with the third fitting portion in the second annular groove 44 of the adjusting component 40 through the fourth fitting portion thereon, and a sealing structure is also arranged between the third fitting portion and the fourth fitting portion, so that the adjusting component 40 is tightly fitted and connected to the first nozzle 21 and the cleaning medium in the second flow channel 220 is prevented from leaking.

[0035] In this embodiment, the length of the insulating nozzle 20 is adjustable, so that it can be selected according to usage requirements and actual working conditions to adapt to different working environments.

[0036] Optionally, the insulating nozzle 20 is a telescopic tube that is telescopically adjustable, or the insulating nozzles 20 of different lengths can be directly replaced for use.

[0037] In this embodiment, the distance L1 between the outer wall of the first nozzle 21 and the inner wall of the second nozzle 22 satisfies: 0.5cm≤L1≤1.5cm. In this way, the corresponding distance is selected according to the use requirements and actual working conditions, and the flow rate in the second flow channel can be adjusted accordingly to facilitate cleaning of the nozzle 30; preferably, the distance L1 satisfies 0.5cm≤L1≤1.5cm.

[0038] In this embodiment, two connecting parts are arranged opposite to each other on one end of the nozzle 30 close to the adjusting component 40, and the two connecting parts are respectively hinged to the adjusting component 40, so that the nozzle 30 is rotatably arranged relative to the adjusting component 40. In this way, the nozzle 30 can adjust the spray angle by 360 degrees to adapt to different working environments.

[0039] Specifically, the self-cleaning insulating spray gun also includes a protective cover and a connecting piece; the protective cover is arranged on the nozzle 30, a first clamping part is arranged on the adjusting component 40, and a second clamping part is arranged in the protective cover, so that the first clamping part and the second clamping part are mutually clamped after the protective cover is arranged on the nozzle 30; the connecting piece is respectively connected to the protective cover and the adjusting component 40, so as to pull the protective cover when the protective cover is separated from the nozzle 30. In the above arrangement, the first clamping part is two protrusions arranged on the outer wall of the adjusting component 40, and the second clamping part is two grooves arranged in the protective cover, and the two grooves are respectively corresponding to the two protrusions for clamping and cooperating, so as to protect the spray gun when it is not in use; at the same time, when the spray gun is in use, the protective cover can be taken off the nozzle 30 and the connecting piece can be used to pull the protective cover to prevent it from being lost and to facilitate the timely removal of the cover and to set it on the nozzle 30 next time.

[0040] In this embodiment, the protective cover is made of plastic material; and the connecting piece is made of elastic material.

[0041] From the above description, it can be seen that the above embodiments of the utility model achieve the following technical effects:

[0042] The self-cleaning insulating spray gun includes a gun body, an insulating nozzle and a nozzle; the insulating nozzle is connected to the gun body, the insulating nozzle includes a first nozzle and a second nozzle, the first nozzle has a first flow channel, the first nozzle is arranged in the second nozzle and forms a second flow channel with the inner wall of the second nozzle, and a spray interface connected to the insulating nozzle is arranged on the gun body, so as to provide spray material into the first flow channel and provide cleaning medium into the second flow channel respectively; the nozzle is connected to the end of the insulating nozzle away from the gun body through an adjusting component, the nozzle is rotatably arranged, and the adjusting component is provided with a first injection part and a second injection part corresponding to the first flow channel and the second flow channel respectively, the first injection part is connected to the nozzle, and the second injection part is arranged toward the inner wall of the nozzle, so that the spray material is sprayed out from the nozzle through the first injection part or the second injection part sprays the cleaning medium to clean the nozzle. In this way, the spraying material is supplied to the first flow channel in the first nozzle through the spray interface, and is sprayed out through the first injection part and the nozzle of the adjusting component. After the nozzle is used for a long time and sprays liquid, a large amount of residual spray material will accumulate on the inner wall or nozzle mouth of the nozzle, making the nozzle mouth blocked and unusable. Then, the cleaning medium is supplied to the second flow channel between the first nozzle and the second nozzle through the spray interface, and is sprayed to the inner wall and nozzle mouth of the nozzle through the second injection part to clean the accumulated residual spray material, thereby improving the working efficiency of the spraying and the service life of the product, thereby solving the problem of the spray gun in the prior art being unable to clean the nozzle after long-term use and spraying liquid, resulting in blockage.

[0043] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0044] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps described in these embodiments do not limit the scope of the utility model. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0045] In the description of the present utility model, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present utility model; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0046] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0047] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A self-cleaning insulating spray gun, characterized in that: include: Gun body (10); an insulating nozzle (20) connected to the gun body (10), the insulating nozzle (20) comprising a first nozzle (21) and a second nozzle (22), the first nozzle (21) having a first flow channel (210), the first nozzle (21) being arranged in the second nozzle (22) and forming a second flow channel (220) with the inner wall of the second nozzle (22), the gun body (10) being provided with a spraying interface (11) in communication with the insulating nozzle (20) for respectively providing spraying material into the first flow channel (210) and providing a cleaning medium into the second flow channel (220); The nozzle (30) is connected to an end of the insulating nozzle (20) away from the gun body (10) through an adjusting component (40); the nozzle (30) is rotatably arranged; the adjusting component (40) is provided with a first ejection portion (41) and a second ejection portion (42) respectively corresponding to the first flow channel (210) and the second flow channel (220); the first ejection portion (41) is connected to the nozzle (30); the second ejection portion (42) is arranged toward the inner wall of the nozzle (30), so that the spraying material is ejected from the nozzle (30) through the first ejection portion (41) or the second ejection portion (42) ejects the cleaning medium to clean the nozzle (30).

2. The self-cleaning insulating spray gun according to claim 1, characterized in that: The adjusting component (40) is respectively provided with a first annular groove (43) and a second annular groove (44); one end of the first nozzle (21) is rotatably disposed in the first annular groove (43), and one end of the second nozzle (22) is rotatably disposed in the second annular groove (44); wherein the diameter of the first annular groove (43) is smaller than the diameter of the second annular groove (44).

3. The self-cleaning insulating spray gun according to claim 2, characterized in that: The second injection portion (42) includes a plurality of cleaning parts (420) arranged at intervals along the circumferential direction of the adjusting component (40), and the adjusting component (40) is provided with a plurality of second mounting holes (46) which are arranged one-to-one corresponding to the plurality of cleaning parts (420) and are interconnected, and the plurality of second mounting holes (46) are connected to the second flow channel (220), and the plurality of second mounting holes (46) are arranged in the second annular groove (44) and avoid the second nozzle (22), or the plurality of second mounting holes (46) are arranged between the first annular groove (43) and the second annular groove (44).

4. The self-cleaning insulating spray gun according to claim 2, characterized in that: The first injection portion (41) comprises an injection member (410), the adjustment member (40) is provided with a first mounting hole (45) connected to the injection member (410), the first mounting hole (45) is connected to the first flow channel (210), and the first annular groove (43) is arranged around the first mounting hole (45).

5. The self-cleaning insulating spray gun according to claim 2, characterized in that: A first matching portion is provided on the inner side wall of the first annular groove (43), and a second matching portion is provided on the outer side wall of the first nozzle (21), and the first matching portion and the second matching portion are matched and connected with each other; wherein one of the first matching portion and the second matching portion is a protrusion, and the other of the first matching portion and the second matching portion is a groove.

6. The self-cleaning insulating spray gun according to claim 2, characterized in that: A third matching portion is provided on the inner side wall of the second annular groove (44), and a fourth matching portion is provided on the outer side wall of the second nozzle (22), and the third matching portion and the fourth matching portion are matched and connected with each other; wherein one of the third matching portion and the fourth matching portion is a protrusion, and the other of the third matching portion and the fourth matching portion is a groove.

7. The self-cleaning insulating spray gun according to claim 1, characterized in that: The length of the insulating nozzle (20) is adjustable; and / or, A distance L1 between the outer wall surface of the first nozzle (21) and the inner wall surface of the second nozzle (22) satisfies: 0.5 cm ≤ L1 ≤ 1.5 cm.

8. The self-cleaning insulating spray gun according to claim 1, characterized in that: Two connecting parts are arranged opposite to each other on one end of the nozzle (30) close to the adjusting component (40), and the two connecting parts are respectively hinged to the adjusting component (40) so that the nozzle (30) can be rotatably arranged relative to the adjusting component (40).

9. The self-cleaning insulating spray gun according to claim 1, characterized in that: The self-cleaning insulating spray gun also includes: A protective cover, which is arranged on the nozzle (30), the adjusting component (40) is provided with a first clamping portion, and a second clamping portion is arranged inside the protective cover, so that the first clamping portion and the second clamping portion are mutually clamped after the protective cover is arranged on the nozzle (30); A connecting member is respectively connected to the protective cover and the adjusting component (40) so as to pull the protective cover when the protective cover is separated from the nozzle (30).

10. The self-cleaning insulating spray gun according to claim 9, characterized in that: The protective cover is made of plastic material; and / or the connecting piece is made of elastic material.

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