Water meter shell electrostatic spraying device based on water meter processing

Abstract

The invention relates to the technical field of instruments, in particular to a meter shell electrostatic spraying device based on water meter processing, which comprises a supporting platform, a spraying box and an electrostatic spray gun, the bottom of the spraying box is fixedly connected with the top of the supporting platform, and the electrostatic spray gun is mounted at the top of an inner cavity of the spraying box and is connected with coating equipment through a pipeline; the meter shell electrostatic spraying device based on water meter processing further comprises a quality guaranteeing mechanism, a rotating air cylinder, a positioning mechanism, a dust collecting cover, a filtering mechanism and a dust collecting pipe, and the quality guaranteeing mechanism is fixedly connected to the left side wall of the spraying box; the rotating cylinder is mounted at the right end of the quality guaranteeing mechanism; the positioning mechanism is mounted at the output end of the rotary cylinder. The watchcase is suspended and positioned, the outer surface of the watchcase is not shielded, the comprehensive spraying effect is achieved, unstable powder on the surface of the watchcase is thrown away, the watchcase is provided with a firm anti-corrosion layer, the powder collecting function is achieved, powder waste is prevented, and the watchcase spraying cost is saved.

Description

Technical Field

[0001] The invention relates to the technical field of instruments, and in particular to a water meter shell electrostatic spraying device based on water meter processing. Background Art

[0002] A water meter is an instrument for measuring water flow, most of which measure the cumulative flow of water. It is generally divided into two categories: volumetric water meters and velocity water meters. Water meters are often placed in humid and cool environments. Therefore, an anti-corrosion layer must be coated on the case to prevent corrosion. As a metal structure, electrostatic spraying is the best coating method. Electrostatic spraying technology is the most commonly used method for case production. The principle of electrostatic spraying is to use the principle of corona discharge to make the atomized paint negatively charged under the action of a high-voltage DC electric field, and adsorbed on the surface of a positively charged substrate to discharge; In order to facilitate the adjustment of the spraying angle, the invention with the publication number CN110586356A discloses a watchcase electrostatic spraying device based on water meter processing, including a support frame, a non-slip support foot is fixedly installed at the side position of the bottom of the support frame, a material drawer is movably installed at the middle position of the lower end of the front of the support frame, a control panel is fixedly installed at the middle position of the front of the support frame, and the mixed material tank and the spray gun are movably connected to each other through a spraying conveying pipe. Although the above equipment is flexible to use, there are still certain deficiencies in spraying quality and resource saving. For example, when spraying, the watchcase is placed on a positioning tooling table, and the surface of the watchcase is inevitably blocked. It is inconvenient to change the spraying angle of the watchcase, and dead angles are prone to appear in the spraying; for some non-charged and poor quality coating powders, they are not firmly attached to the watchcase, and such powders cannot be removed, resulting in poor quality of the anti-corrosion layer after subsequent heating and curing; and, there is no powder collection ability, and some powder will be lost, and the production cost is high; in view of the defects existing in the watchcase spraying, a watchcase electrostatic spraying device with high spraying quality is now proposed. Summary of the invention

[0003] In order to overcome the shortcomings of the prior art that dead angles are prone to occur during spraying, the spraying quality cannot be improved, and the paint powder is difficult to collect, the present invention proposes a watch case electrostatic spraying device based on water meter processing.

[0004] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a watch case electrostatic spraying device based on water meter processing, comprising a supporting platform, a spray box and an electrostatic spray gun, the bottom of the spray box is fixedly connected to the top of the supporting platform, the electrostatic spray gun is installed on the top of the inner cavity of the spray box, the electrostatic spray gun is connected to the coating equipment through a pipeline, so that the electrostatic spray gun sprays charged coating powder outward, and the watch case electrostatic spraying device based on water meter processing also includes a preservation mechanism, a rotating cylinder, a positioning mechanism, a dust hood, a filtering mechanism and a dust collecting pipe, the preservation mechanism is fixedly connected to the left side wall of the spray box; the rotating cylinder is installed at the right end of the preservation mechanism; the positioning mechanism is installed at the output end of the rotating cylinder, and the positioning mechanism can be rotated 180 degrees by the rotating cylinder; the dust hood is fixedly connected to the bottom of the spray box; the filtering mechanism is fixedly connected to the rear end of the right side wall of the spray box; one end of the dust collecting pipe is installed at the bottom of the dust hood, and the other end is connected to the front end of the filtering mechanism.

[0005] Preferably, the preservation mechanism includes a casing, a slide rod, a slide seat, a pin, a support rod, a first motor, a turntable and a guide groove, the casing is fixedly connected to the left side wall of the spray box; there are at least two slide rods, both of which are installed at the bottom of the inner cavity of the casing along the front-to-back direction; the slide seat can be slid back and forth and is sleeved on the outer wall of the slide rod; the pin is vertically installed at the center position of the upper surface of the slide seat; one end of the support rod is installed at the center position of the right side wall of the slide seat, and the other end is connected to the left end of the rotating cylinder; the first motor is installed at the front of the casing; the turntable is installed at the output end of the first motor, and a guide groove is opened on the side wall of the turntable, and the pin is inserted into the inner cavity of the guide groove, so that the slide seat is shaken back and forth through the preservation mechanism to shake off the loose paint powder on the casing.

[0006] Preferably, the dust collecting hood is located directly below the electrostatic spray gun.

[0007] Preferably, the guide grooves are distributed on the side wall of the turntable in a wave shape.

[0008] Preferably, the positioning mechanism includes a sleeve, a hollow cylinder, a clamping block, an inclined groove, a linear cylinder, a push rod and a guide column. The sleeve is transversely installed at the output end of the rotating cylinder; the hollow cylinder is transversely fixedly connected to the right side wall of the sleeve; there are four clamping blocks, which are inserted into the left and right ends of the outer wall of the hollow cylinder opposite to each other front and back, the clamping blocks are grounded through wires, and an inclined groove is opened on the inner side of the clamping blocks; the linear cylinder is transversely installed in the inner cavity of the sleeve; the push rod is transversely installed at the output end of the linear cylinder; there are four guide columns, which are installed into the left and right ends of the outer wall of the push rod opposite to each other front and back, and the guide columns are inserted into the inner cavity of the inclined groove, and the case is suspended and positioned by the positioning mechanism without occupying the spraying position of the case.

[0009] Preferably, the two front-to-back opposite inclined grooves are symmetrical with respect to the center line of the push rod.

[0010] Preferably, the filter mechanism includes a filter box, a fan, a static electricity removal component, a partition, a rotating seat, an outer gear ring, a second motor, a spur gear, a filter cartridge, a brush and a collection bucket. The filter box is fixedly connected to the rear end of the right side wall of the spray box; the fan is installed at the right end of the upper surface of the filter box, and the fan air inlet is connected to the top of the filter box, so that the filter box forms a negative pressure under the action of the fan suction; the static electricity removal component is installed at the bottom of the outer wall of the filter box in the front-to-back direction; the partition is installed horizontally at the top of the inner cavity of the filter box; the rotating seat is rotatably installed at the center of the partition through a bearing; the outer gear ring is installed On the outer wall of the rotating seat; the second motor is installed at the left end of the upper surface of the filter box; the spur gear is installed at the output end of the second motor, and the spur gear is meshed and connected with the outer gear ring. Under the drive of the second motor, the rotating seat can be rotated through the transmission of the spur gear and the outer gear ring; the filter cartridge is vertically installed at the bottom of the rotating seat, and the filter cartridge mesh is smaller than the minimum particle size of the paint powder; the brush is vertically installed at the bottom of the partition, and the brush is in contact with the filter cartridge; the collecting barrel is screwed at the bottom end of the outer wall of the filter box, and the paint powder is collected by the collecting barrel, and the paint powder is collected by the filtering mechanism, so that the powder can be recycled and reused.

[0011] Preferably, the length of the brush is greater than the height of the filter cartridge.

[0012] Preferably, the static electricity removal assembly includes a static electricity removal box, a baffle and a static electricity removal rod. The static electricity removal box is installed at the bottom of the outer wall of the filter box in the front-to-back direction, and the front end of the static electricity removal box is connected to the dust collection pipe; there are several baffles, which are installed on the inner wall of the static electricity removal box at equal distances from front to back; the static electricity removal rod is installed on the outer wall of the baffle in the front-to-back direction, and the charge on the coating powder is eliminated by the static electricity removal rod.

[0013] Preferably, a plurality of the baffles are alternately distributed on the upper and lower inner walls of the static electricity removal box.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention drives the push rod to move rightward by a linear cylinder, and the clamping block moves outward under the cooperation of the guide column and the inclined groove, so as to form a support on the inner wall of the watch case, and position the watch case in the air without blocking the outer surface of the watch case, thereby achieving a comprehensive spraying effect.

[0015] 2. The present invention drives the turntable to rotate by the first motor, and the slide seat swings back and forth under the cooperation of the guide groove and the pin, so that the hollow cylinder drives the watch case to move, and the loose powder on the surface of the watch case is thrown off, so that the watch case has a firm anti-corrosion layer.

[0016] 3. The present invention forms negative pressure in the filter box through the suction force of the fan, the dust hood sucks away the gas containing powder, the baffle changes the direction of airflow movement, allows the powder to fully approach the static electricity elimination rod, removes the static electricity on the powder, and then the filter cartridge filters the powder, and the collection bucket collects the powder again. Under the drive of the second motor, the filter cartridge is rotated through the transmission conditions of the spur gear and the outer gear ring, and the brush removes the powder attached to the surface of the filter cartridge. The filter cartridge always has good air permeability and has a powder collection function, which prevents powder waste and saves the cost of shell spraying. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the present invention.

[0018] Figure 2 It is an exploded view of the quality preservation mechanism of the present invention.

[0019] Figure 3 It is a top cross-sectional view of the positioning mechanism of the present invention.

[0020] Figure 4 It is a schematic diagram of the filtering mechanism structure of the present invention.

[0021] Figure 5 It is a front cross-sectional view of the filtering mechanism of the present invention.

[0022] Figure 6 For the present invention Figure 5 Enlarged view of point A in the middle.

[0023] Figure 7 It is a right side cross-sectional view of the static electricity removal component of the present invention.

[0024] In the figure: 1. support platform; 2. spray box; 3. electrostatic spray gun; 4. quality preservation mechanism; 5. rotating cylinder; 6. positioning mechanism; 7. dust hood; 8. filtering mechanism; 9. dust collecting tube; 41. casing; 42. slide rod; 43. slide seat; 44. pin; 45. support rod; 46. first motor; 47. turntable; 48. guide groove; 61. sleeve; 62. hollow cylinder; 63. clamping block; 64. inclined groove; 65. linear cylinder; 66. push rod; 67. guide column; 81. filter box; 82. fan; 83. static elimination component; 84. partition; 85. rotating seat; 86. outer gear ring; 87. second motor; 88. spur gear; 89. filter cartridge; 810. brush; 811. collecting bucket; 831. static elimination box; 832. baffle; 833. static elimination rod. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0026] The present invention provides a technical solution: a watch case electrostatic spraying device based on water meter processing, such as Figure 1 As shown, it includes a supporting platform 1, a spray box 2 and an electrostatic spray gun 3. The bottom of the spray box 2 is fixedly connected to the top of the supporting platform 1, and the electrostatic spray gun 3 is installed on the top of the inner cavity of the spray box 2. The electrostatic spray gun 3 is connected to the coating equipment through a pipeline, so that the coating equipment provides coating powder to the electrostatic spray gun 3. The electrostatic spray gun 3 is also connected to the electrostatic generator to charge the powder sprayed by the electrostatic spray gun 3. The left side wall of the spray box 2 is fixedly connected with a quality preservation mechanism 4, and a rotating cylinder 5 is installed at the right end of the quality preservation mechanism 4. A positioning mechanism 6 is installed at the output end of the rotating cylinder 5. The positioning mechanism 6 can be rotated 180 degrees by rotating the cylinder 5 to change the spraying surface of the case. A dust collecting hood 7 is installed at the bottom of the spray box 2, and the dust collecting hood 7 is located directly below the electrostatic spray gun 3, so that the fallen powder can enter the dust collecting hood 7. The rear end of the right side wall of the spray box 2 is fixedly connected with a filtering mechanism 8, and the front end of the filtering mechanism 8 is connected to the bottom of the dust collecting hood 7 through a dust collecting pipe 9.

[0027] Furthermore, Figure 2 As shown, the quality preservation mechanism 4 includes a casing 41 fixedly connected to the left side wall of the spray box 2, at least two slide bars 42 are installed along the front-to-back direction at the bottom of the inner cavity of the casing 41, and a slide seat 43 that can slide forward and backward is sleeved on the outer wall of the slide bar 42. A pin 44 is installed at the center position of the upper surface of the slide seat 43, and one end of a support rod 45 is horizontally installed at the center position of the right side wall of the slide seat 43. The other end of the support rod 45 is connected to the rotating cylinder 5, and the positioning mechanism 6 is moved synchronously with the slide seat 43 through the support rod 45. A first motor 46 is installed on the front of the casing 41, and a turntable 47 is installed on the output end of the first motor 46. A guide groove 48 is opened on the side wall of the turntable 47, and the pin 44 is inserted in the inner cavity of the guide groove 48. The guide groove 48 is distributed in a wave shape on the side wall of the turntable 47. When the first motor 46 drives the turntable 47 to rotate, the inclined surface of the guide groove 48 changes continuously relative to the pin 44. The inclined surface can squeeze the pin 44 back and forth, thereby causing the slide seat 43 to move back and forth repeatedly to shake off the loose paint powder on the case.

[0028] Furthermore, Figure 3As shown, the positioning mechanism 6 includes a sleeve 61 installed transversely at the output end of the rotary cylinder 5, and a hollow cylinder 62 is installed transversely at the right end of the sleeve 61. The watch case is sleeved on the hollow cylinder 62, and the watch case can be positioned inside the watch case to prevent interference with the watch case spraying. The left and right ends of the outer wall of the hollow cylinder 62 are plugged with front and rear opposite clamping blocks 63, which are grounded through a wire, and an inclined groove 64 is opened on the inner side of the clamping block 63. A linear cylinder 65 is installed in the inner cavity of the sleeve 61. The linear cylinder 6 The output end is provided with a push rod 66 which can move it left and right. Front and rear guide posts 67 are provided on the left and right sides of the outer wall of the push rod 66. The guide posts 67 are inserted into the inner cavity of the inclined groove 64. The inclined groove 64 is symmetrical with respect to the midline of the push rod 66. When the push rod 66 drives the guide posts 67 to move left and right, the inclined surface of the guide posts 67 can press the inclined groove 64 inwardly or outwardly, so that the two clamping blocks 63 which are opposite to each other at the front and rear can move inwardly or outwardly at the same time, so that the clamping blocks 63 are clamped on the inner wall of the watch case.

[0029] Furthermore, Figure 4 , Figure 5 and Figure 6 As shown, the filtering mechanism 8 includes a filter box 81 fixedly connected to the rear end of the right side wall of the spray box 2, a fan 82 is installed at the right end of the upper surface of the filter box 81, and the air inlet of the fan 82 is connected to the top of the filter box 81. Under the suction of the fan 82, a negative pressure is formed in the filter box 81, and a static electricity removal component 83 is installed at the bottom of the outer wall of the filter box 81 along the front-to-back direction, and a partition plate 84 is installed horizontally at the top of the inner wall of the filter box 81. A rotatable seat 85 that can rotate is installed at the center of the partition plate 84 through a bearing, and an outer toothed ring 86 is installed on the outer wall of the rotatable seat 85. A second motor 87 is installed at the left end of the upper surface of the filter box 81, and a motor meshing and connected with the outer toothed ring 86 is installed at the output end of the second motor 87. The spur gear 88, driven by the second motor 87, drives the rotating seat 85 to rotate through the spur gear 88 and the outer gear ring 86. A filter cartridge 89 is installed at the bottom of the rotating seat 85. The aperture of the filter cartridge 89 is smaller than the minimum size of the paint powder particle size to filter the paint powder. A brush 810 in contact with the filter cartridge 89 is vertically installed on the lower surface of the partition 84. As the filter cartridge 89 rotates, the brush 810 scrapes off the paint powder on the outer wall of the filter cartridge 89 to ensure the air permeability of the filter cartridge 89. The length of the brush 810 is greater than the height of the filter cartridge 89 to ensure that there will be no dead corners when the brush 810 removes the paint powder. A collection barrel 811 is screwed to the bottom of the outer wall of the filter box 81 to collect the paint powder.

[0030] Furthermore, Figure 7As shown, the static electricity removal component 83 includes a static electricity removal box 831 installed at the bottom of the outer wall of the filter box 81 along the front-to-back direction, the front end of the static electricity removal box 831 is connected to the dust collecting pipe 9, and a plurality of baffles 832 are installed on the inner wall of the static electricity removal box 831 at equal intervals from front to back, and a static electricity elimination rod 833 is installed on the outer wall of the baffle 832 along the front-to-back direction. The static electricity elimination rod 833 is used to neutralize the charge on the paint powder, and a plurality of baffles 832 are alternately distributed on the upper and lower inner walls of the static electricity removal box 831 to form a serpentine channel in the static electricity removal box 831, so that the paint powder can fully contact the static electricity elimination rod 833 to prevent the static electricity removal of the paint powder from being missed.

[0031] Working principle: S1, put the watch case on the outer wall of the hollow cylinder 62, drive the push rod 66 to move right through the linear cylinder 65, and the guide column 67 squeezes the inclined groove 64 outward, so that the clamping block 63 moves outward, and the clamping block 63 contacts the inner wall of the watch case, fixes the watch case on the hollow cylinder 62, and realizes the fixation of the watch case. The electrostatic spray gun 3 sprays negatively charged paint powder on the watch case. The watch case is grounded and positively charged, and a strong electrostatic field is formed between the electrostatic spray gun 3 and the watch case. The powder is evenly adsorbed on the surface of the watch case, so as to achieve the purpose of spraying the watch case; When the other side of the watch case needs to be sprayed, the watch case is rotated 180 degrees by rotating the cylinder 5, the watch case is changed, and the other side of the watch case is sprayed; S2. When it is necessary to remove the loose paint powder, the turntable 47 is driven to rotate by the first motor 46, and the guide groove 48 rotates with the turntable 47. Since the guide groove 48 is wavy, the inclined surface of the guide groove 48 can alternately squeeze the pin 44 back and forth, so that the slide seat 43 moves back and forth along the slide rod 42, shakes off the loose paint powder on the surface of the case, and then performs secondary spraying to improve the paint surface quality of the case; S3. For the coating powder that is not adsorbed on the surface of the case, the suction force of the fan 82 forms a negative pressure in the filter box 81. Since the static electricity removal box 831 is connected to the dust collecting pipe 9, the dust collecting cover 7 absorbs the gas with powder, and the gas preferentially enters the static electricity removal box 831. Under the blocking condition of the baffle 832, the powder floats up and down, and the powder can approach the static electricity elimination rod to neutralize the charge on the powder, and then enter the filter box 81. The filter cartridge 89 uses its own mesh to filter the powder, and the gas is discharged from the fan 82 and collected by the collection bucket 811. S4. When it is necessary to clean the powder attached to the surface of the filter cartridge 89, the second motor 87 drives the spur gear 88 to rotate. Under the transmission of the spur gear 88 and the outer gear ring 86, the rotating seat 85 drives the filter cartridge 89 to rotate, and the brush 810 scrapes off the powder on the filter cartridge 89, so that the filter cartridge 89 always has good air permeability.

[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A watchcase electrostatic spraying device based on water meter processing, characterized in that: The invention comprises a support platform (1), a spray box (2) and an electrostatic spray gun (3), wherein the bottom of the spray box (2) is fixedly connected to the top of the support platform (1), the electrostatic spray gun (3) is installed at the top of the inner cavity of the spray box (2), and the electrostatic spray gun (3) is connected to the coating equipment through a pipeline so that the electrostatic spray gun (3) sprays charged coating powder outwardly. The watch case electrostatic spraying device based on water meter processing also comprises: a quality preservation mechanism (4), a rotating cylinder (5), a positioning mechanism (6), a dust collecting hood (7), a filtering mechanism (8) and a dust collecting pipe (9); The quality preservation mechanism (4) is fixedly connected to the left side wall of the spray box (2), the rotating cylinder (5) is installed at the right end of the quality preservation mechanism (4), the positioning mechanism (6) is installed at the output end of the rotating cylinder (5), and the positioning mechanism (6) can be rotated 180 degrees by the rotating cylinder (5). The dust collecting hood (7) is fixedly connected to the bottom of the spray box (2), the filtering mechanism (8) is fixedly connected to the rear end of the right side wall of the spray box (2), and one end of the dust collecting pipe (9) is installed at the bottom of the dust collecting hood (7), and the other end is connected to the front end of the filtering mechanism (8).

2. According to claim 1, a watchcase electrostatic spraying device based on water meter processing is characterized in that: The quality preservation mechanism (4) comprises: a housing (41), a sliding rod (42), a sliding seat (43), a pin (44), a support rod (45), a first motor (46), a rotating disk (47) and a guide groove (48); The casing (41) is fixedly connected to the left side wall of the spray box (2), the number of slide bars (42) is at least two, and both are installed at the bottom of the inner cavity of the casing (41) along the front-to-back direction, the slide seat (43) is slidably sleeved on the outer wall of the slide bar (42) in the front-to-back direction, the pin (44) is vertically installed at the center position of the upper surface of the slide seat (43), one end of the support rod (45) is installed at the center position of the right side wall of the slide seat (43), and the other end is connected to the left end of the rotating cylinder (5), the first motor (46) is installed on the front side of the casing (41), the turntable (47) is installed at the output end of the first motor (46), the side wall of the turntable (47) is provided with a guide groove (48), and the pin (44) is inserted into the inner cavity of the guide groove (48).

3. The electrostatic spraying device for a watch case based on water meter processing according to claim 2 is characterized in that: The dust collecting hood (7) is located directly below the electrostatic spray gun (3).

4. The electrostatic spraying device for a watch case based on water meter processing according to claim 3 is characterized in that: The guide grooves (48) are distributed in a wave-like manner on the side wall of the rotating disk (47).

5. The electrostatic spraying device for a watch case based on water meter processing according to claim 4 is characterized in that: The positioning mechanism (6) comprises: a sleeve (61), a hollow cylinder (62), a clamping block (63), a linear cylinder (65), a push rod (66), a guide column (67), The sleeve (61) is transversely mounted on the output end of the rotary cylinder (5); the hollow cylinder (62) is transversely fixedly connected to the right side wall of the sleeve (61); there are four clamping blocks (63) which are inserted into the left and right ends of the outer wall of the hollow cylinder (62) in a front-to-back manner; the clamping blocks (63) are grounded through a wire; an oblique groove (64) is provided on the inner side of the clamping blocks (63); the linear cylinder (65) is transversely mounted on the inner cavity of the sleeve (61); the push rod (66) is transversely mounted on the output end of the linear cylinder (65); there are four guide pillars (67) which are installed in the left and right ends of the outer wall of the push rod (66) in a front-to-back manner; and the guide pillars (67) are inserted into the inner cavity of the oblique groove (64).

6. The electrostatic spraying device for a watch case based on water meter processing according to claim 5 is characterized in that: The two front and rear opposite inclined grooves (64) are symmetrical with respect to the center line of the push rod (66).

7. The electrostatic spraying device for a watch case based on water meter processing according to claim 6 is characterized in that: The filtering mechanism (8) comprises: a filter box (81), a fan (82), a static electricity removal component (83), a partition (84), a rotating seat (85), an outer gear ring (86), a second motor (87), a spur gear (88), a filter cartridge (89), a brush (810) and a collection bucket (811); The filter box (81) is fixedly connected to the rear end of the right side wall of the spray box (2), the fan (82) is installed at the right end of the upper surface of the filter box (81), the air inlet of the fan (82) is connected to the top of the filter box (81), and the filter box (81) is formed with negative pressure under the suction of the fan (82). The static electricity removal component (83) is installed at the bottom of the outer wall of the filter box (81) in the front-to-back direction, the partition (84) is installed horizontally at the top of the inner cavity of the filter box (81), the rotating seat (85) is rotatably installed at the center position of the partition (84) through a bearing, the outer gear ring (86) is installed on the outer wall of the rotating seat (85), and the second motor (87) is installed on the filter box ( 81), a spur gear (88) is installed at the output end of the second motor (87), and the spur gear (88) is meshed with the outer gear ring (86). When driven by the second motor (87), the rotating seat (85) can be rotated through the transmission of the spur gear (88) and the outer gear ring (86). A filter cartridge (89) is vertically installed at the bottom of the rotating seat (85), and the mesh of the filter cartridge (89) is smaller than the minimum particle size of the coating powder. A brush (810) is vertically installed at the bottom of the partition (84), and the brush (810) is in contact with the filter cartridge (89). A collection barrel (811) is screwed to the bottom end of the outer wall of the filter box (81), and the coating powder is collected through the collection barrel (811).

8. The electrostatic spraying device for a watch case based on water meter processing according to claim 7 is characterized in that: The length of the brush (810) is greater than the height of the filter cartridge (89).

9. The electrostatic spraying device for a watch case based on water meter processing according to claim 8 is characterized in that: The static electricity removal component (83) comprises: a static electricity removal box (831), a baffle (832) and a static electricity removal rod (833); The static electricity removal box (831) is installed at the bottom of the outer wall of the filter box (81) along the front-to-back direction, and the front end of the static electricity removal box (831) is connected to the dust collecting pipe (9). There are a plurality of baffles (832) which are installed at equal distances from front to back on the inner wall of the static electricity removal box (831). The static electricity elimination rod (833) is installed on the outer wall of the baffle (832) along the front-to-back direction, and the charge on the coating powder is eliminated by the static electricity elimination rod (833).

10. The electrostatic spraying device for a watch case based on water meter processing according to claim 9, characterized in that: A plurality of baffles (832) are alternately distributed on the upper and lower inner walls of the static electricity removal box (831).

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