Nozzle for electrostatic spray gun

Abstract

The utility model discloses a spray nozzle for an electrostatic spray gun, which comprises a rear joint connected with a spray gun head, the rear joint is in threaded connection with a middle connecting part, the middle connecting part is connected with a front spray nozzle head, a funnel through groove is arranged in the middle connecting part, a spray nozzle through groove communicated with the funnel through groove is arranged in the front spray nozzle head, and the spray nozzle through groove is communicated with the funnel through groove. A detachable filter screen is installed at the connecting position of the middle connecting part and the rear connector, a fastening retaining ring is installed on the front nozzle head, and the fastening retaining ring enables the front nozzle head to be detachably installed on the middle connecting part, so that the middle connecting part and the front nozzle head can be separated from each other, and when the electrostatic spray gun is used, inner caked large particles can be filtered conveniently. And meanwhile, the nozzle is integrally connected in a separable manner, so that the nozzle is conveniently separated section by section and cleaned section by section, the spraying transmitting end of the electrostatic spraying gun is timely cleaned and maintained, and the use effect of multiple spraying of the electrostatic spraying gun is effectively improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to electrostatic spraying technical field especially is related to a nozzle for electrostatic spray gun. BACKGROUND

[0002] The electrostatic spray gun is with the object to be coated as the positive electrode, the coating atomization device as the negative electrode, and the coating atomization device with high negative voltage, the electrostatic field is formed between the two electrodes, the atomized coating particles are negatively charged, and the coating is effectively adsorbed on the surface of the opposite electrode.

[0003] In the powder spraying operation of the electrostatic spray gun, there will be powder residues at the nozzle of the electrostatic spray gun, and when large particles appear at the nozzle, the nozzle will be blocked, which makes it inconvenient to clean the nozzle position and affects the subsequent powder spraying effect of the electrostatic spray gun. UTILITY MODEL CONTENTS

[0004] In order to overcome the deficiencies of the prior art, the utility model provides a nozzle for electrostatic spray gun, which realizes timely cleaning and maintenance of the spraying emission end of the electrostatic spray gun and effectively improves the use effect of the electrostatic spray gun for multiple spraying.

[0005] To solve the above technical problems, the utility model provides the following technical scheme: a nozzle for electrostatic spray gun, including the rear connector connected with the gun head, the rear connector is connected with the middle connector, the middle connector is connected with the front nozzle head, the middle connector is equipped with funnel through slot, the front nozzle head is equipped with nozzle through slot communicated with funnel through slot, the middle connector is installed with detachable filter screen at the connection with the rear connector, the front nozzle head is installed with fastening buckle, the fastening buckle detachably installs the front nozzle head on the middle connector, so that the middle connector and the front nozzle head can be separated from each other.

[0006] As a preferred technical scheme of the utility model, the filter screen is fixed through the annular net rack outside, the outer side of the annular net rack is equipped with a plurality of circumferentially distributed elastic cards, the elastic card is in elastic abutment with the inner wall of the middle connector, the inner wall of the one end of the middle connector close to the rear connector forms a stepped port, and the annular net rack is in abutment on the stepped port.

[0007] As a preferred technical scheme of the utility model, the stepped port is provided with a positioning ring groove, and the annular net rack is fixedly provided with a positioning rubber ring on one side, and the positioning rubber ring is inserted into the positioning ring groove.

[0008] As a preferred technical scheme of the utility model, the net hole of the filter screen is penetrated by a pull rope, one end of the pull rope close to the port of the middle connector is provided with a front anti-skid limiting head, and the other end of the pull rope is provided with a rear limiting head.

[0009] As a preferred technical scheme of the utility model, one end of the front nozzle head and the middle connecting part is connected to form a limiting edge, one end of the fastening buckle is limited to abut on the limiting edge, and the other end of the fastening buckle is screwed in the end of the middle connecting part.

[0010] As a preferred technical scheme of the utility model, the first positioning magnetic strip is embedded and installed in the end of the middle connecting part close to the front nozzle head, the second positioning magnetic strip is embedded and installed in the end of the front nozzle head close to the middle connecting part, and the magnetic poles on the opposite sides of the first positioning magnetic strip and the second positioning magnetic strip are opposite.

[0011] As a preferred technical scheme of the utility model, a sealing rubber ring is arranged at the joint of the funnel through groove and the nozzle through groove, and the sealing rubber ring is arranged around the end of the funnel through groove and the nozzle through groove and embedded in the end of the middle connecting part and the front nozzle head.

[0012] Compared with the prior art, the utility model has the beneficial effects that:

[0013] The funnel through groove is arranged in the middle connecting part, the nozzle through groove is arranged in the front nozzle head, the middle connecting part and the front nozzle head are detachably connected through the fastening buckle, the filter screen is installed, the filter screen is detachably installed at the beginning of the funnel through groove through the annular net rack, the elastic card and the positioning rubber ring, the middle connecting part and the rear connector are connected through the thread, the internal caking particles can be filtered when the electrostatic spray gun is used, the nozzle is prevented from being blocked, the nozzle is integrally connected in a separable mode, the nozzle can be separated section by section, the nozzle can be cleaned section by section, the electrostatic spray gun spraying emission end can be cleaned and maintained in time, and the use effect of the electrostatic spray gun for multiple spraying is effectively improved.

[0014] Additional aspects and advantages of the utility model will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the following embodiment or prior art description will be briefly introduced, and obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained according to these drawings without the creative labor of the ordinary skilled in the art.

[0016] Fig. 1 It is the structural schematic diagram of the utility model;

[0017] Fig. 2 It is the structural schematic diagram of the front nozzle head of the utility model;

[0018] Fig. 3 It is the structure schematic view of the connecting part in the utility model;

[0019] Fig. 4 It is the sectional view of the nozzle of the utility model;

[0020] Fig. 5 It is the structure schematic view of the annular net rack in the utility model Fig. 4 The enlarged view at A;

[0021] Fig. 6 It is the structure schematic view of the annular net rack in the utility model.

[0022] Wherein: 1, rear joint; 2, middle connecting part; 3, fastening buckle; 4, front nozzle head; 5, first positioning magnetic strip; 6, first sealing rubber ring; 7, second positioning magnetic strip; 8, second sealing rubber ring; 9, funnel inner groove; 10, nozzle inner groove; 11, limiting along the mouth; 12, filter screen; 13, annular net rack; 14, positioning rubber ring; 15, pull rope; 16, front anti-skid limiting head; 17, rear limiting head; 18, elastic card. DETAILED DESCRIPTION

[0023] In order to make the technical means, creative features, purposes and effects realized by the utility model easy to understand, the utility model is further described below in combination with specific embodiments, but the following embodiments are only preferred embodiments of the utility model, not all. Based on the embodiments in the embodiments, other embodiments obtained by those skilled in the art without creative labor all belong to the protection scope of the utility model. The experimental methods in the following embodiments are all conventional methods, and the materials, reagents and the like used in the following embodiments are all available from commercial channels unless otherwise specified.

[0024] Referring to Figs. 1-6 As shown in the utility model provides a kind of nozzle for electrostatic spray gun, including the rear joint 1 connected with the spray gun head, rear joint 1 is screw-threaded connection with middle connecting part 2, middle connecting part 2 is connected with front nozzle head 4, funnel through slot 9 is equipped in middle connecting part 2, nozzle through slot 10 is equipped in front nozzle head 4 and communicated with funnel through slot 9, detachable filter screen 12 is installed at the connecting place of middle connecting part 2 and rear joint 1, for the filtration of electrostatic spray powder lump big particle, front nozzle head 4 is installed with fastening buckle 3, fastening buckle 3 is detachably installed on middle connecting part 2 with front nozzle head 4, so that middle connecting part 2 and front nozzle head 4 can be separated, so that middle connecting part 2 and front nozzle head 4 can be cleaned respectively.

[0025] Preferably, the filter screen 12 is fixed through the external annular net rack 13, the outer side of the annular net rack 13 is provided with a plurality of circumferentially distributed elastic cards 18, the elastic cards 18 are in elastic abutment with the inner wall of the middle connecting part 2, so that the filter screen 12 can be limited and fixed on the inner wall of the middle connecting part 2, the inner wall of the end of the middle connecting part 2 close to the rear joint 1 forms a stepped port 8, the annular net rack 13 abuts on the stepped port 8, so that when the electrostatic spray gun sprays high-pressure powder towards the front nozzle head 4 and acts on the filter screen 12, the filter screen 12 can be limited.

[0026] Preferably, the stepped port 8 is provided with a positioning ring groove, the annular net rack 13 is fixed with a positioning rubber ring 14 on one side, the positioning rubber ring 14 is inserted into the positioning ring groove, so as to prevent the annular net rack 13 from shaking in the inner groove of the middle connecting part 2, and at the same time, the sealing of the connection between the annular net rack 13 and the stepped port 8 is realized.

[0027] Preferably, the filter screen 12 is provided with a pull rope 15 inserted into the mesh, the pull rope 15 is provided with a front anti-skid limiting head 16 at one end close to the port of the middle connecting part 2, and is provided with a rear limiting head 17 at the other end, when the filter screen 12 is taken out from the middle connecting part 2, the filter screen 12 can be pulled out by grabbing the front anti-skid limiting head 16 and pulling the pull rope 15.

[0028] Preferably, the front nozzle head 4 is formed with a limiting edge port 11 at the end connected with the middle connecting part 2, one end of the fastening buckle 3 is limited and abuts on the limiting edge port 11, the other end of the fastening buckle 3 is screwed on the end of the middle connecting part 2, and the separation and connection of the front nozzle head 4 and the middle connecting part 2 can be realized by loosening and tightening the fastening buckle 3.

[0029] Preferably, the end of the middle connecting part 2 close to the front nozzle head 4 is embedded with circumferentially distributed first positioning magnetic strips 5, and the end of the front nozzle head 4 close to the middle connecting part 2 is embedded with circumferentially distributed second positioning magnetic strips 7, the opposite sides of the first positioning magnetic strips 5 and the second positioning magnetic strips 7 have opposite magnetic poles, and when the front nozzle head 4 and the middle connecting part 2 are fixed through the fastening buckle 3, the first positioning magnetic strips 5 and the second positioning magnetic strips 7 can be adsorbed and positioned, so as to facilitate the screwing operation of the fastening buckle 3.

[0030] Preferably, the connection between the funnel through groove 9 and the nozzle through groove 10 is provided with a sealing rubber ring 6, the sealing rubber ring 6 is arranged around the ports of the funnel through groove 9 and the nozzle through groove 10 and is embedded in the end of the middle connecting part 2 and the front nozzle head 4 respectively, so as to realize the sealing of the connection between the nozzle through groove 10 and the funnel through groove 9.

[0031] In use, the nozzle is screwed into the head of the electrostatic spray gun through the rear connector 1, and when the nozzle is used for a period of time, the middle connector 2 is unscrewed from the rear connector 1 together with the front nozzle head 4, the front anti-skid limiting head 16 is held by hand and pulled outward, the filter screen 12 is taken out from the end of the middle connector 2 together with the annular screen frame 13, the filter screen 12 is repeatedly cleaned, the fastening buckle 3 is loosened and unscrewed from the other end of the middle connector 2, the middle connector 2 is separated from the front nozzle head 4, the middle connector 2 and the front nozzle head 4 are cleaned respectively to remove residual spraying powder, after cleaning, the filter screen 12 is installed back to the end of the middle connector 2, the front nozzle head 4 is aligned with the middle connector 2, and the front nozzle head 4 is fixed by using the fastening buckle 3 and installed back to the rear connector 1 for use.

[0032] By arranging the funnel through slot 9 in the middle connector 2 and the nozzle through slot 10 in the front nozzle head 4, the funnel through slot 9 and the nozzle through slot 10 are in communication with each other, the middle connector 2 and the front nozzle head 4 are detachably connected through the fastening buckle 3, the filter screen 12 is installed at the end of the middle connector 2 close to the electrostatic spray gun, the filter screen 12 is detachably installed at the beginning of the funnel through slot 9 through the annular screen frame 13, the elastic card 18 and the positioning rubber ring 14, and the middle connector 2 is connected with the rear connector 1 through threads, so that the internal caked particles can be filtered in the electrostatic spray gun, the nozzle is prevented from being blocked, the nozzle is integrally connected in a detachable mode, the nozzle can be separated and cleaned section by section, the electrostatic spray gun spraying launching end can be maintained in time, and the use effect of the electrostatic spray gun in multiple spraying is effectively improved.

[0033] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can include that the first and second features are in direct contact, or the first and second features are not in direct contact but are in contact through other features between them. Moreover, the first feature "on", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "under", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0034] The basic principle, main features and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited by the above examples, and the above examples and descriptions in the specification are only preferred examples of the present application and are not intended to limit the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A nozzle for electrostatic spray guns, comprising a rear connector (1) to be connected to the head of the spray gun, characterized in that: The rear joint (1) is threadedly connected with a middle connecting part (2), the middle connecting part (2) is connected with a front nozzle head (4), the middle connecting part (2) is internally provided with a funnel through slot (9), the front nozzle head (4) is internally provided with a nozzle through slot (10) in communication with the funnel through slot (9), a detachable filter screen (12) is mounted at the connecting position of the middle connecting part (2) and the rear joint (1), a fastening buckle (3) is mounted on the front nozzle head (4), the fastening buckle (3) detachably mounts the front nozzle head (4) on the middle connecting part (2), so that the middle connecting part (2) and the front nozzle head (4) can be separated from each other.

2. A nozzle for an electrostatic spray gun according to claim 1, characterized in that: The filter screen (12) is fixed by an annular net rack (13) outside the filter screen (12), the annular net rack (13) is externally provided with a plurality of circumferentially distributed elastic clamps (18), the elastic clamps (18) elastically abut against the inner wall of the middle connecting part (2), the inner wall of the end of the middle connecting part (2) close to the rear joint (1) forms a stepped port (8), and the annular net rack (13) abuts against the stepped port (8).

3. A nozzle for an electrostatic spray gun according to claim 2, wherein: A positioning ring groove is formed in the stepped port (8), and a positioning rubber ring (14) is fixed on one side of the annular net rack (13) and is inserted into the positioning ring groove.

4. A nozzle for an electrostatic spray gun according to claim 1 or 3, characterised in that: A pull rope (15) is inserted into the mesh of the filter screen (12), a front anti-skid limiting head (16) is arranged at one end of the pull rope (15) close to the port of the middle connecting part (2), and a rear limiting head (17) is arranged at the other end of the pull rope (15).

5. The nozzle for an electrostatic spray gun of claim 1, wherein: One end of the front nozzle head (4) connected with the middle connecting part (2) forms a limiting edge (11), one end of the fastening buckle (3) is limited to abut against the limiting edge (11), and the other end of the fastening buckle (3) is threadedly mounted at the end of the middle connecting part (2).

6. A nozzle for an electrostatic spray gun according to claim 5, wherein: A plurality of circumferentially distributed first positioning magnetic strips (5) are inlaid at the end of the middle connecting part (2) close to the front nozzle head (4), a plurality of circumferentially distributed second positioning magnetic strips (7) are inlaid at the end of the front nozzle head (4) close to the middle connecting part (2), and the opposite faces of the first positioning magnetic strips (5) and the second positioning magnetic strips (7) have opposite magnetic poles.

7. A nozzle for an electrostatic spray gun according to claim 6, wherein: A sealing rubber ring (6) is arranged at the connecting position of the funnel through slot (9) and the nozzle through slot (10), and the sealing rubber ring (6) is inlaid at the end of the middle connecting part (2) and the end of the front nozzle head (4) respectively.

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