Selectable alkali efflorescence prevention post-treatment device for fastener hot galvanizing equipment and method of selective alkali efflorescence prevention post-treatment device

Abstract

The invention discloses a selectable alkali efflorescence prevention post-treatment device and method for fastener hot galvanizing equipment, and relates to the technical field of fastener hot galvanizing treatment.The selectable alkali efflorescence prevention post-treatment device comprises an alkali efflorescence treatment box, a screen frame is arranged in an inner cavity of the alkali efflorescence treatment box, and clear water pipes are embedded in the upper ends of the outer walls of the two sides of the alkali efflorescence treatment box; chemical treatment assemblies extending to the upper end of the inner cavity of the alkali return treatment box body are mounted on the two sides of the bottom of the alkali return treatment box body. Under the washing action of clear water, slight efflorescence alkali on the surface of the fastener can be removed, the efflorescence alkali is neutralized by means of dilute sulfuric acid, meanwhile, rust and dirt on the surface of the fastener can be removed, the efflorescence alkali is neutralized by means of a dilute sodium hydroxide solution, and meanwhile, zinc plume and other dirt can be removed; and a second electric sliding rail is started to drive a first electric sliding block, a vertical plate, a first electric sliding rail, a third electric sliding block, a second air cylinder and a scrubbing brush to synchronously move, so that the outer surface of the fastener can be fully rubbed, and residual alkali return on the surface of the fastener can be conveniently removed.

Description

Technical Field

[0001] The invention relates to the technical field of hot-dip galvanizing treatment of fasteners, and in particular to a selectable alkali-reversion prevention post-treatment device and method for hot-dip galvanizing equipment of fasteners. Background Art

[0002] The hot-dip galvanizing process for fasteners is to perform hot-dip treatment on the outer surface of the fasteners to form a layer of zinc film to protect the fasteners and improve the anti-corrosion effect. However, after hot-dip galvanizing of some fasteners, alkali reversion is prone to occur on the outer surface. At present, when alkali reversion occurs after hot-dip galvanizing of fasteners, staff are usually required to hold a dry cloth and gently wipe it off. However, when the alkali reversion is more serious, the cleaning effect is not good. For this reason, the applicant proposes a selectable anti-alkali reversion post-treatment device for fastener hot-dip galvanizing equipment that is different from the prior art to solve the above technical problems. Summary of the invention

[0003] In order to improve the above-mentioned problem of poor cleaning effect when the alkali reversion is serious after the fasteners are hot-dip galvanized, the present invention provides a selective alkali reversion prevention post-treatment device and method for fastener hot-dip galvanizing equipment.

[0004] The present invention provides a selective alkali-reversion prevention post-treatment device and method for fastener hot-dip galvanizing equipment, which adopts the following technical solutions:

[0005] A selectable alkali-return prevention post-treatment device for fastener hot-dip galvanizing equipment comprises an alkali-return treatment box, the inner cavity of the alkali-return treatment box is provided with a mesh frame, the upper ends of the outer walls on both sides of the alkali-return treatment box are inlaid with clean water pipes, chemical treatment components extending to the upper end of the inner cavity of the alkali-return treatment box are installed at both sides of the bottom of the alkali-return treatment box, a waste liquid treatment box is installed at the bottom of two groups of chemical treatment components, a second drainage pipe extending to the inner cavity of the waste liquid treatment box is installed at the middle position of the bottom of the alkali-return treatment box, a hoisting component fixed to the mesh frame is installed at the rear side of the upper surface of the waste liquid treatment box, a cleaning brush component is installed at the other side of the upper surface of the waste liquid treatment box, a first drainage pipe is installed at one end of the bottom wall of the waste liquid treatment box, and a pH meter is installed at the lower end of the outer wall of one side of the waste liquid treatment box.

[0006] Optionally, the chemical treatment component includes a liquid storage box, which is fixed on the bottom wall of the alkali return treatment box, and a liquid injection tube is installed at one end of the upper surface of the liquid storage box, a liquid pump is installed at the bottom of the inner cavity of the liquid storage box, and a liquid transfer pipe extending into the inner cavity of the alkali return treatment box is installed at the output end of the liquid pump.

[0007] Optionally, the hoisting assembly includes a hoisting plate, which is fixed to the upper surface of the waste liquid treatment box, and an electric winch is installed on the upper surface of the hoisting plate. The output end of the electric winch is installed with a steel wire rope fixed to the top position of the outer wall of the mesh frame.

[0008] Optionally, the inner cavity of the mesh frame is provided with a plurality of groups of partition mesh plates, and a plurality of groups of I-shaped legs are installed on the lower surfaces of the plurality of groups of partition mesh plates.

[0009] Optionally, the cleaning brush assembly includes a horizontal plate, which is fixed to the upper surface of the waste liquid treatment box, and clamping parts are symmetrically installed on both sides of the upper surface of the horizontal plate, a moving part is installed at one end of the upper surface of the horizontal plate, and a brush part is installed at the end of the moving part.

[0010] Optionally, the clamping member includes a first cylinder, which is fixed to the upper surface of the cross plate through a gasket, a third electric slide rail is installed at the output end of the first cylinder, a second electric slider is installed in the inner cavity of the third electric slide rail, and a clamp is installed at the end of the second electric slider.

[0011] Optionally, the moving part includes a second electric slide rail, which is fixed on the upper surface of the horizontal plate, a first electric slider is installed in the inner cavity of the second electric slide rail, a vertical plate is installed at the end of the first electric slider, the first electric slide rail is installed on the top of the outer wall of one side of the vertical plate, and a third electric slider is installed on the outside of the first electric slide rail.

[0012] Optionally, the brush member includes a second cylinder, the second cylinder is fixed on the outer wall of the third electric slider, and a detachable hard brush is installed at the output end of the second cylinder.

[0013] Optionally, a protective frame is installed at the lower end of the outer wall of one side of the waste liquid treatment box, a servo motor is installed at the lower surface of the inner cavity of the protective frame, and a spiral horizontal axis extending into the inner cavity of the waste liquid treatment box is installed at the output end of the servo motor through a coupling.

[0014] A selective alkali-reversion prevention post-treatment method for a fastener hot-dip galvanizing equipment comprises the following steps:

[0015] S1: placing the waste liquid treatment box at an appropriate position, placing multiple sets of partition mesh plates in the inner cavity of the mesh frame in sequence, and placing fasteners on the upper surfaces of the multiple sets of partition mesh plates in sequence during the placement process, and then starting the electric control winch to drive the wire rope to wind up and unwind, so that the mesh frame can be gradually moved down under the action of gravity and be at the bottom of the inner cavity of the alkali return treatment box;

[0016] S2: After step S1, when the surface of the fastener is slightly alkali-backed, the control valve on the clean water pipe is opened to allow clean water to be injected into the inner cavity of the alkali-backed treatment box, and the slight alkali-backed surface of the fastener can be removed under the flushing effect of the clean water;

[0017] S3: After step S1, when moderate or severe alkali reversion occurs on the surface of the fastener, the control valve on the injection pipe is first opened to inject appropriate amounts of dilute sulfuric acid and dilute sodium hydroxide solution into the inner cavities of the two groups of liquid storage boxes through the injection pipes, and the liquid pumps at different positions are started successively to inject the dilute sulfuric acid and dilute sodium hydroxide solution into the inner cavity of the alkali reversion treatment box through the liquid transfer pipe in turn. The alkali reversion is neutralized by dilute sulfuric acid, and the rust and dirt on the surface of the fastener can be removed at the same time. The alkali reversion is neutralized by dilute sodium hydroxide solution, and zinc feather and other dirt can be removed at the same time.

[0018] S4: When performing step S3, the control valve on the second liquid discharge pipe is opened to collect the used clean water, dilute sulfuric acid and dilute sodium hydroxide solution into the inner cavity of the waste liquid treatment box, and the pH meter is used to automatically measure the acidity and alkalinity of the liquid collected in the inner cavity of the waste liquid treatment box. When the liquid is acidic, an appropriate amount of dilute sodium hydroxide solution can be added, and when the liquid is alkaline, an appropriate amount of dilute sulfuric acid can be added, so that the control valve on the first liquid discharge pipe can be opened to discharge the used waste liquid to avoid the waste liquid from polluting the environment;

[0019] S5: When performing step S4, the servo motor is started to drive the spiral horizontal axis to rotate so that the waste liquid in the inner cavity of the waste liquid treatment box can be fully stirred to make the waste liquid mixed evenly;

[0020] S6: After steps S1-S5, the electric control winch is started to drive the wire rope to be reeled up, so as to drive the net frame to move up and separate from the alkali return treatment box, so as to facilitate the drainage of the waste liquid attached to the surface of the fastener;

[0021] S7: After steps S1-S5, when there is residual alkali on the surface of the fastener, multiple groups of fasteners can be placed between the two groups of clamps, and then the two groups of first cylinders are started to extend to drive the third electric slide rail, the second electric slider and the clamp plate to move synchronously until the fastener is completely clamped and fixed, the first electric slide rail is started to drive the third electric slider to move up and down, thereby driving the second cylinder and the bristle brush to move synchronously, the second cylinder is started to extend to drive the bristle brush to move horizontally and contact the outer surface of the fastener, the third electric slide rail is started to drive the second electric slider to move forward and backward, thereby driving the clamp plate to move synchronously and then driving the fastener to rotate, the second electric slide rail is started to drive the first electric slider to move forward and backward, thereby driving the vertical plate, the first electric slide rail, the third electric slider, the second cylinder and the bristle brush to move synchronously, thereby fully rubbing the outer surface of the fastener, and conveniently removing the residual alkali on the surface of the fastener.

[0022] In summary, the present invention includes at least one of the following beneficial effects:

[0023] When the fastener surface is slightly alkali-backed, open the control valve on the clean water pipe to allow clean water to be injected into the inner cavity of the alkali-back treatment box, and the slight alkali-backed surface of the fastener can be removed under the flushing effect of the clean water;

[0024] When moderate or severe alkali reversion occurs on the surface of the fastener, start the liquid pumps at different positions and inject dilute sulfuric acid and dilute sodium hydroxide solution into the inner cavity of the alkali reversion treatment box in sequence through the liquid transfer pipe. With the help of dilute sulfuric acid, the alkali reversion is neutralized, and the rust and dirt on the surface of the fastener can be removed at the same time. With the help of dilute sodium hydroxide solution, the alkali reversion can be neutralized, and zinc feathers and other dirt can be removed at the same time.

[0025] When there is residual alkali on the surface of the fastener, start the two groups of first cylinders to extend and fully clamp the fastener, start the first electric slide to drive the third electric slider, the second cylinder and the bristle brush to move synchronously, start the third electric slide to drive the second electric slider, the clamping plate and the fastener to rotate, start the second electric slide to drive the first electric slider, the vertical plate, the first electric slide, the third electric slider, the second cylinder and the bristle brush to move synchronously, so that the outer surface of the fastener can be fully rubbed to facilitate the removal of residual alkali on the surface of the fastener. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a front view cross-sectional structural schematic diagram of the present invention;

[0027] Figure 2 It is a schematic diagram of the front view and cross-section structure of the cleaning brush assembly of the present invention;

[0028] Figure 3 It is a schematic diagram of the left side cross-sectional structure of the cleaning brush assembly of the present invention.

[0029] In the figure: 1. partition screen; 2. screen frame; 3. liquid injection pipe; 4. liquid pump; 5. protection frame; 6. servo motor; 7. first liquid discharge pipe; 8. second liquid discharge pipe; 9. liquid storage box; 10. spiral horizontal axis; 11. waste liquid treatment box; 12. pH meter; 13. I-shaped leg; 14. liquid transfer pipe; 15. alkali return treatment box; 16. lifting plate; 17. electric winch; 18. wire rope; 19. clean water pipe; 20. first electric slide rail; 21. vertical plate; 22. first electric slider; 23. second electric slide rail; 24. first cylinder; 25. clamping plate; 26. third electric slide rail; 27. horizontal plate; 28. second electric slider; 29. ​​bristle brush; 30. second cylinder; 31. third electric slider. DETAILED DESCRIPTION

[0030] The following is combined with Figure 1-3 The present invention is described in further detail.

[0031] Please refer to the attached figure in the instruction manual Figure 1 A selectable post-treatment device for preventing alkali reversion for hot-dip galvanizing equipment for fasteners includes an alkali reversion treatment box 15, the inner cavity of the alkali reversion treatment box 15 is provided with a mesh frame 2, the upper surfaces of the alkali reversion treatment box 15 and the mesh frame 2 are both arranged to be open, the upper ends of the outer walls on both sides of the alkali reversion treatment box 15 are inlaid with clean water pipes 19, and chemical treatment components are installed on both sides of the bottom of the alkali reversion treatment box 15, and the chemical treatment components include a liquid storage box 9, and the liquid storage box 9 is partially fixed on the bottom wall of the alkali reversion treatment box 15.

[0032] Please refer to the attached figure in the instruction manual Figure 1 The liquid storage box 9 and the alkali return treatment box 15 are partially overlapped, and the overlapping cross-sectional size is larger than two-thirds of the cross-sectional size of the liquid storage box 9. An injection pipe 3 is installed at one end of the upper surface of the liquid storage box 9, and a control valve is installed on the outside of the injection pipe 3. The injection pipe 3 is arranged at the outer side of the alkali return treatment box 15. A liquid pump 4 is installed at the bottom position of the inner cavity of the liquid storage box 9, and a liquid transfer pipe 14 extending to the inner cavity of the alkali return treatment box 15 is installed at the output end of the liquid pump 4.

[0033] Please refer to the attached figure in the instruction manual Figure 1 A waste liquid treatment box 11 is installed at the bottom position of the two groups of liquid storage boxes 9, a second drainage pipe 8 extending to the inner cavity of the waste liquid treatment box 11 is installed at the middle position of the bottom of the alkali return treatment box 15, a control valve is installed on the outside of the second drainage pipe 8, the second drainage pipe 8 is arranged between the two groups of liquid storage boxes 9, a lifting assembly is installed at the rear side of the upper surface of the waste liquid treatment box 11, the lifting assembly includes a lifting plate 16, the lifting plate 16 is fixed on the upper surface of the waste liquid treatment box 11, the longitudinal section of the lifting plate 16 is set to be L-shaped, the lifting plate 16 is arranged at the outer side of the liquid storage box 9 and the alkali return treatment box 15, an electric control winch 17 is installed on the upper surface of the lifting plate 16, and a steel wire rope 18 fixed to the top position of the outer wall of the net frame 2 is installed at the output end of the electric control winch 17.

[0034] Please refer to the attached figure in the instruction manual Figure 1 , 2 And 3, a cleaning brush assembly is installed on the other side of the upper surface of the waste liquid treatment box 11, and the cleaning brush assembly includes a horizontal plate 27, and the horizontal plate 27 is fixed on the upper surface of the waste liquid treatment box 11. Clamps are symmetrically installed on both sides of the upper surface of the horizontal plate 27, and the clamps include a first cylinder 24, and the first cylinder 24 is fixed to the upper surface of the horizontal plate 27 through a pad. A third electric slide rail 26 is installed at the output end of the first cylinder 24, and a second electric slider 28 is installed in the inner cavity of the third electric slide rail 26. A clamp plate 25 is installed at the end of the second electric slider 28, and an outer wall of the clamp plate 25 is provided with an anti-slip protrusion.

[0035] Please refer to the attached figure in the instruction manual Figure 1 , 2 and 3. A moving part is installed at one end of the upper surface of the horizontal plate 27, and the moving part includes a second electric slide rail 23. The second electric slide rail 23 is fixed on the upper surface of the horizontal plate 27. A first electric slider 22 is installed in the inner cavity of the second electric slide rail 23. A vertical plate 21 is installed at the end of the first electric slider 22. A first electric slide rail 20 is installed at the top of the outer wall on one side of the vertical plate 21. A third electric slider 31 is installed on the outside of the first electric slide rail 20.

[0036] Please refer to the attached figure in the instruction manual Figure 1 , 2 and 3. A brush member is installed at the end of the third electric slider 31, and the brush member includes a second cylinder 30. The second cylinder 30 is fixed on the outer wall of the third electric slider 31. A detachable bristle brush 29 is installed at the output end of the second cylinder 30. The second cylinder 30 and the bristle brush 29 are both arranged above the multiple groups of clamps 25. A first drain pipe 7 is installed at one end of the bottom wall of the waste liquid treatment box 11, and a control valve is installed on the outside of the first drain pipe 7. A pH meter 12 is installed at the lower end of the outer wall of one side of the waste liquid treatment box 11.

[0037] Please refer to the attached figure in the instruction manual Figure 1 The inner cavity of the mesh frame 2 is provided with multiple groups of partition mesh plates 1, the cross-sectional dimensions of the partition mesh plates 1 are slightly smaller than the cross-sectional dimensions of the inner cavity of the alkali return treatment box 15, and multiple groups of I-shaped legs 13 are installed on the lower surfaces of the multiple groups of partition mesh plates 1.

[0038] Please refer to the attached figure in the instruction manual Figure 1 A protective frame 5 is installed at the lower end of the outer wall of one side of the waste liquid treatment box 11. The protective frame 5 is arranged on the side away from the pH meter 12. A servo motor 6 is installed at the lower surface of the inner cavity of the protective frame 5. The output end of the servo motor 6 is equipped with a spiral horizontal axis 10 extending to the inner cavity of the waste liquid treatment box 11 through a coupling. The end of the spiral horizontal axis 10 is rotatably connected to the inner wall of the waste liquid treatment box 11 through a bearing.

[0039] A selective alkali-reversion prevention post-treatment method for a fastener hot-dip galvanizing equipment comprises the following steps:

[0040] S1: placing the waste liquid treatment box 11 at an appropriate position, placing multiple groups of partition mesh plates 1 in the inner cavity of the mesh frame 2 in sequence, and placing fasteners on the upper surface of the multiple groups of partition mesh plates 1 in sequence during the placement process, and then starting the electric control winch 17 to drive the wire rope 18 to wind up, so that the mesh frame 2 can be gradually moved down under the action of gravity and be at the bottom of the inner cavity of the alkali return treatment box 15;

[0041] S2: After step S1, when the surface of the fastener is slightly alkali-backed, the control valve on the clean water pipe 19 is opened to allow clean water to be injected into the inner cavity of the alkali-back treatment box 15, and the slight alkali-backed surface of the fastener can be removed under the flushing effect of the clean water;

[0042] S3: After step S1, when moderate or severe alkali reversion occurs on the surface of the fastener, the control valve on the injection pipe 3 is first opened to inject appropriate amounts of dilute sulfuric acid and dilute sodium hydroxide solution into the inner cavities of the two groups of liquid storage boxes 9 through the injection pipe 3, and the liquid pumps 4 at different positions are started successively to inject the dilute sulfuric acid and dilute sodium hydroxide solution into the inner cavity of the alkali reversion treatment box 15 through the liquid transfer pipe 14 in turn. The alkali reversion is neutralized by dilute sulfuric acid, and the rust and dirt on the surface of the fastener can be removed at the same time. The alkali reversion is neutralized by dilute sodium hydroxide solution, and zinc feathers and other dirt can be removed at the same time.

[0043] S4: When performing step S3, the control valve on the second liquid discharge pipe 8 is opened to collect the used clean water, dilute sulfuric acid and dilute sodium hydroxide solution into the inner cavity of the waste liquid treatment box 11. The pH meter 12 automatically determines the acidity and alkalinity of the liquid collected in the inner cavity of the waste liquid treatment box 11. When the liquid is acidic, an appropriate amount of dilute sodium hydroxide solution can be added. When the liquid is alkaline, an appropriate amount of dilute sulfuric acid can be added. Thus, the control valve on the first liquid discharge pipe 7 can be opened to discharge the used waste liquid to avoid the waste liquid from polluting the environment;

[0044] S5: When performing step S4, the servo motor 6 is started to drive the spiral horizontal axis 10 to rotate so that the waste liquid in the inner cavity of the waste liquid treatment box 11 can be fully stirred to make the waste liquid mixed evenly;

[0045] S6: After steps S1-S5, the electric-controlled hoist 17 is started to drive the steel wire rope 18 to reel up, thereby driving the net frame 2 to move upward and separate from the alkali return treatment box 15, so as to facilitate the drainage of the waste liquid attached to the surface of the fastener;

[0046] S7: After steps S1-S5, when there is residual alkali on the surface of the fastener, multiple groups of fasteners can be placed between the two groups of clamps 25, and then the two groups of first cylinders 24 are started to extend to drive the third electric slide rail 26, the second electric slider 28 and the clamp plate 25 to move synchronously until the fastener is completely clamped and fixed, the first electric slide rail 20 is started to drive the third electric slider 31 to move up and down, thereby driving the second cylinder 30 and the bristle brush 29 to move synchronously, the second cylinder 30 is started to extend to drive the bristle brush 29 to move horizontally and contact the outer surface of the fastener, the third electric slide rail 26 is started to drive the second electric slider 28 to move forward and backward, thereby driving the clamp plate 25 to move synchronously and then driving the fastener to rotate, the second electric slide rail 23 is started to drive the first electric slider 22 to move forward and backward, thereby driving the vertical plate 21, the first electric slide rail 20, the third electric slider 31, the second cylinder 30 and the bristle brush 29 to move synchronously, thereby fully rubbing the outer surface of the fastener, and conveniently removing the residual alkali on the surface of the fastener.

[0047] The above are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A selective alkali-reversion prevention post-treatment device for a fastener hot-dip galvanizing equipment, comprising an alkali-reversion treatment box (15), characterized in that: The inner cavity of the alkali return treatment box (15) is provided with a mesh frame (2), the upper ends of the outer walls on both sides of the alkali return treatment box (15) are inlaid with clean water pipes (19), the two sides of the bottom of the alkali return treatment box (15) are installed with chemical treatment components extending to the upper end of the inner cavity of the alkali return treatment box (15), the bottom positions of the two groups of chemical treatment components are installed with a waste liquid treatment box (11), the middle position of the bottom of the alkali return treatment box (15) is installed with a second drainage pipe (8) extending to the inner cavity of the waste liquid treatment box (11), the rear side of the upper surface of the waste liquid treatment box (11) is installed with a hanging component fixed to the mesh frame (2), the other side of the upper surface of the waste liquid treatment box (11) is installed with a cleaning component, one end of the bottom wall of the waste liquid treatment box (11) is installed with a first drainage pipe (7), and the lower end of the outer wall of one side of the waste liquid treatment box (11) is installed with a pH meter (12).

2. The selective alkali-reversion prevention post-treatment device for hot-dip galvanizing equipment for fasteners according to claim 1, characterized in that: The chemical treatment component comprises a liquid storage box (9), the liquid storage box (9) being fixed on the bottom wall of the alkali return treatment box (15), a liquid injection pipe (3) being installed at one end of the upper surface of the liquid storage box (9), a liquid pump (4) being installed at the bottom position of the inner cavity of the liquid storage box (9), and a liquid transfer pipe (14) extending to the inner cavity of the alkali return treatment box (15) being installed at the output end of the liquid pump (4).

3. The selective alkali-reversion prevention post-treatment device for hot-dip galvanizing equipment for fasteners according to claim 1, characterized in that: The hoisting assembly comprises a hoisting plate (16), the hoisting plate (16) being fixed on the upper surface of the waste liquid treatment box (11), an electric-controlled hoisting machine (17) being installed on the upper surface of the hoisting plate (16), and a steel wire rope (18) being fixed to the top position of the outer wall of the net frame (2) being installed at the output end of the electric-controlled hoisting machine (17).

4. The selective alkali-reversion prevention post-treatment device for hot-dip galvanizing equipment for fasteners according to claim 1, characterized in that: The inner cavity of the mesh frame (2) is provided with a plurality of groups of partition mesh plates (1), and a plurality of groups of I-shaped legs (13) are installed on the lower surfaces of the plurality of groups of partition mesh plates (1).

5. The selective alkali-reversion prevention post-treatment device for hot-dip galvanizing equipment for fasteners according to claim 1, characterized in that: The cleaning brush assembly comprises a transverse plate (27), the transverse plate (27) being fixed on the upper surface of the waste liquid treatment box (11), clamping parts being symmetrically mounted on both sides of the upper surface of the transverse plate (27), a moving part being mounted on one end of the upper surface of the transverse plate (27), and a brush part being mounted on the end of the moving part.

6. A selective alkali-reversion prevention post-treatment device for hot-dip galvanizing equipment for fasteners according to claim 5, characterized in that: The clamping member comprises a first cylinder (24), the first cylinder (24) being fixed to the upper surface of a transverse plate (27) via a pad, a third electric slide rail (26) being installed at the output end of the first cylinder (24), a second electric slider (28) being installed in the inner cavity of the third electric slide rail (26), and a clamping plate (25) being installed at the end of the second electric slider (28).

7. A selective alkali-reversion prevention post-treatment device for hot-dip galvanizing equipment for fasteners according to claim 6, characterized in that: The moving part comprises a second electric slide rail (23), the second electric slide rail (23) is fixed on the upper surface of the horizontal plate (27), a first electric slider (22) is installed in the inner cavity of the second electric slide rail (23), a vertical plate (21) is installed at the end of the first electric slider (22), a first electric slide rail (20) is installed at the top end of the outer wall of one side of the vertical plate (21), and a third electric slider (31) is installed outside the first electric slide rail (20).

8. The selective alkali-reversion prevention post-treatment device for hot-dip galvanizing equipment for fasteners according to claim 7, characterized in that: The brush member comprises a second cylinder (30), the second cylinder (30) is fixed on the outer wall of the third electric slider (31), and a detachable hard brush (29) is installed at the output end of the second cylinder (30).

9. The selective alkali-reversion prevention post-treatment device for hot-dip galvanizing equipment for fasteners according to claim 1, characterized in that: A protective frame (5) is installed at the lower end of the outer wall of one side of the waste liquid treatment box (11), a servo motor (6) is installed at the lower surface of the inner cavity of the protective frame (5), and a spiral transverse axis (10) extending into the inner cavity of the waste liquid treatment box (11) is installed at the output end of the servo motor (6) via a coupling.

10. A selective alkali-reversion prevention post-treatment method for hot-dip galvanizing equipment for fasteners, characterized in that: The following steps are involved: S1: placing the waste liquid treatment box (11) at an appropriate position, placing multiple groups of partition mesh plates (1) in the inner cavity of the mesh frame (2) in sequence, and placing fasteners on the upper surface of the multiple groups of partition mesh plates (1) in sequence during the placement process, and then starting the electric control winch (17) to drive the steel wire rope (18) to reel in, so that the mesh frame (2) can be gradually moved downward under the action of gravity and be located at the bottom of the inner cavity of the alkali return treatment box (15); S2: After step S1, when the surface of the fastener is slightly alkali-reverted, the control valve on the clean water pipe (19) is opened to allow clean water to be injected into the inner cavity of the alkali-reverting treatment box (15), and the slight alkali-reverted surface of the fastener can be removed under the flushing effect of the clean water; S3: After step S1, when moderate or severe alkali reversion occurs on the surface of the fastener, the control valve on the injection pipe (3) is first opened to inject appropriate amounts of dilute sulfuric acid and dilute sodium hydroxide solution into the inner cavities of the two groups of liquid storage boxes (9) through the injection pipe (3), and the liquid pumps (4) at different positions are started successively and the dilute sulfuric acid and dilute sodium hydroxide solution are injected into the inner cavity of the alkali reversion treatment box (15) in sequence through the liquid transfer pipe (14). The alkali reversion is neutralized by the dilute sulfuric acid, and the rust and dirt on the surface of the fastener can be removed at the same time. The alkali reversion is neutralized by the dilute sodium hydroxide solution, and the zinc feather and other dirt can be removed at the same time. S4: When performing step S3, the control valve on the second liquid discharge pipe (8) is opened to collect the used clean water, dilute sulfuric acid and dilute sodium hydroxide solution into the inner cavity of the waste liquid treatment box (11). The pH meter (12) automatically determines the acidity and alkalinity of the liquid collected in the inner cavity of the waste liquid treatment box (11). When the liquid is acidic, an appropriate amount of dilute sodium hydroxide solution can be added. When the liquid is alkaline, an appropriate amount of dilute sulfuric acid can be added. Then, the control valve on the first liquid discharge pipe (7) can be opened to discharge the used waste liquid, thereby preventing the waste liquid from polluting the environment. S5: When performing step S4, the servo motor (6) is started to drive the spiral horizontal shaft (10) to rotate so as to fully stir the waste liquid in the inner cavity of the waste liquid treatment box (11) so that the waste liquid is mixed evenly; S6: After steps S1-S5, the electric-controlled hoist (17) is started to drive the steel wire rope (18) to reel in, thereby driving the net frame (2) to move upward and separate from the alkali return treatment box (15), so as to facilitate the drainage of the waste liquid attached to the surface of the fastener; S7: After steps S1-S5, when there is residual alkali on the surface of the fastener, multiple groups of fasteners can be placed between the two groups of clamping plates (25), and then the two groups of first cylinders (24) are started to extend to drive the third electric slide rail (26), the second electric slider (28) and the clamping plates (25) to move synchronously until the fasteners are completely clamped and fixed, the first electric slide rail (20) is started to drive the third electric slider (31) to move up and down, thereby driving the second cylinder (30) and the bristle brush (29) to move synchronously, and the second cylinder (30) is started to extend to drive the bristle brush (29) The electric slider (28) is driven to move horizontally and contact the outer surface of the fastener, and the third electric slide rail (26) is started to drive the second electric slider (28) to move forward and backward, thereby driving the clamping plate (25) to move synchronously and then driving the fastener to rotate, and the second electric slide rail (23) is started to drive the first electric slider (22) to move forward and backward, thereby driving the vertical plate (21), the first electric slide rail (20), the third electric slider (31), the second cylinder (30) and the hard brush (29) to move synchronously, thereby fully rubbing the outer surface of the fastener, and conveniently removing the residual alkali on the surface of the fastener.

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