A pretreatment device for galvanizing Dacromet steel wire and a control method thereof

Abstract

The present invention relates to the technical field of steel wire galvanizing, in particular to a pretreatment device for galvanizing Dacromet steel wire and a control method thereof. The pretreatment device for galvanizing Dacromet steel wire comprises a collecting tank and an overflow tank, wherein the overflow tank is fixed inside the collecting tank, and further comprises: an extension groove, wherein the extension groove is arranged at the bottom of the overflow tank; a guide surface, wherein the guide surface is arranged on the bottom surface of the overflow tank and is located on both sides of the extension groove; a plurality of suction components, wherein one end of each suction component is connected to the outside of the overflow tank, and the other end of the suction component is used to absorb micro impurities in the overflow tank; the present invention adds an extension groove at the bottom of the overflow tank, and a guide surface is arranged at the bottom of the overflow tank, wherein the guide surface is in an inclined state, and is used to guide the deposited impurities to the inside of the extension groove; since the height of the extension groove is lower than the bottom of the overflow tank, the internal solution is less disturbed from above, thereby making it easier for impurities to be deposited.

Description

Technical Field

[0001] The invention relates to the field of steel wire galvanizing, and in particular to a pretreatment device for Dacromet steel wire galvanizing processing and a control method thereof. Background Art

[0002] Steel wire galvanizing is a process of coating the steel wire with zinc, mainly through hot-dip galvanizing, to improve the steel wire's corrosion resistance and enhance its decorative effect. The hot-dip galvanizing process includes degreasing, pickling, water washing, then coating with a plating agent and drying, then immersing the steel wire in molten zinc liquid, and finally wiping off the zinc liquid surface by different methods to form a zinc layer.

[0003] In the process of plating or assisting plating by overflow, although most of the impurities will be discharged from the overflow tank with the solution at the overflow, there are still heavier impurities that may settle inside the overflow tank. Unlike ordinary plating pools, the external solution will continue to enter the overflow tank, causing the solution inside the overflow tank to always be in a flowing state, which makes it difficult for these impurities to settle and float to the overflow discharge height. These impurities flow freely in the overflow tank and easily stick to the surface of the steel wire, affecting the plating quality. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a pretreatment device for galvanizing Dacromet steel wire and a control method thereof.

[0005] To achieve the above objectives, in a first aspect, the present invention provides a pretreatment device for galvanizing Dacromet steel wire, comprising a collecting tank and an overflow tank, wherein the overflow tank is fixed inside the collecting tank, and further comprising:

[0006] An extension groove, wherein the extension groove is provided at the bottom of the overflow tank;

[0007] A guide surface, which is arranged on the bottom surface of the overflow tank and located on both sides of the extension groove;

[0008] A plurality of suction components, one end of each suction component is connected to the outside of the overflow tank, and the other end of the suction component is used to absorb micro impurities in the overflow tank;

[0009] A processing terminal, the processing terminal is used to control the suction height of the suction component to absorb micro impurities at multiple positions in the overflow tank;

[0010] Specifically, in the process of plating or assisting plating by overflow, although most of the impurities will be discharged from the overflow tank with the solution at the overflow, there are still heavier impurities that may settle inside the overflow tank; unlike ordinary plating tanks, the external solution will continue to enter the overflow tank, causing the solution inside the overflow tank to always be in a flowing state, which makes it difficult for these impurities to settle and float to the height of overflow discharge. These impurities flow freely in the overflow tank and are easy to stick to the surface of the steel wire, affecting the plating quality;

[0011] During the plating process, the external plating solution is input into the overflow tank, the plating solution in the overflow tank flows out from the overflow port and enters the collecting tank, the plating solution in the collecting tank is filtered by a filtering device, and then discharged into the overflow tank, thereby completing the circulation of the plating solution, wherein, during the overflow process, the impurities floating in the overflow tank can also be discharged into the collecting tank under the overflow effect, thereby completing the removal of the impurities;

[0012] However, some heavier impurities may be difficult to reach the overflow height. Therefore, special treatment is required for such impurities. The present invention provides an extension groove at the bottom of the overflow pool, and a guide surface is provided at the bottom of the overflow pool. The guide surface is in an inclined state and is used to guide the deposited impurities to the inside of the extension groove. Since the height of the extension groove is lower than the bottom of the overflow pool, the internal solution is less disturbed from above, so that impurities are more easily deposited.

[0013] The water inlet of the overflow tank can also be arranged at a higher position of the guide surface, so as to facilitate flushing impurities into the extension tank;

[0014] And by setting the suction component, the suction component can actively absorb the impurities suspended in the overflow tank, further reducing the impurity content in the overflow tank, which is beneficial to ensure the plating quality;

[0015] Furthermore, by adjusting the suction height of the suction component, it is also beneficial to increase its suction range.

[0016] Preferably, it also includes:

[0017] A drainage hole, the drainage hole is formed on the side wall of the extension groove, and the drainage hole is located at the bottom end of the side wall of the extension groove;

[0018] Specifically, by opening a drainage hole on the side wall of the extension tank, part of the solution in the overflow pool has a tendency to flow into the extension tank, thereby accelerating the fluidity of the solution in the extension tank, which is beneficial to ensuring the uniformity of the temperature in the extension tank and avoiding the internal temperature being too low, which would adversely affect the overall plating solution.

[0019] Under the action of flow, the deposited impurities can actively enter the extension groove, and a drainage hole is opened on the side wall of the extension groove. Due to the large diameter of the drainage hole, the deposited impurities can be discharged into the collection pool through the drainage hole for active discharge.

[0020] Preferably, the suction assembly comprises:

[0021] A plurality of suction tubes, one end of each of which is fixed on the outer wall of the extension groove, and each of which is in communication with the outside;

[0022] A plurality of movable tubes, each of which is sleeved on the outside of the suction tube, a plurality of suction ports are opened on the top side wall of each movable tube, and a connecting plate is fixed to the top of all the movable tubes;

[0023] An electric cylinder, wherein the electric cylinder is fixed on the outer wall of the overflow tank, and the movable end of the electric cylinder is fixed to the connecting plate;

[0024] Among them, after the solution enters from the suction port of the movable tube, it flows along the inside of the movable tube to the inside of the suction tube, and finally flows out from the end of the suction tube. Impurities enter with the solution and are discharged from the end of the suction tube.

[0025] By starting the electric cylinder, the electric cylinder drives the connecting plate to move up and down, drives the movable tube to move up and down, thereby causing the suction port to move up and down. By changing the suction position, impurities suspended in the solution at different heights can be sucked, thereby facilitating the absorption of more suspended impurities and reducing the contact opportunity between impurities and steel wire, thereby ensuring the plating quality.

[0026] Preferably, the top of the suction pipe is lower than the connection position between the extension tank and the overflow tank, and a solenoid valve is also provided in the suction pipe. The processing terminal is also used to control the solenoid valve to close when the suction port drops to a preset position;

[0027] The preset position can be designed according to user needs, but the preset position is located below the connection position between the extension tank and the overflow tank and above the top of the suction tube, so that the water flow at the preset position has a tendency to flow into the extension tank;

[0028] When the suction port drops to the preset position, the control solenoid valve is closed. At this time, the suction effect at the suction port disappears, and some loosely adhered impurities fall directly and flow along the water flow to the drain port.

[0029] Then, the movable tube is pushed down continuously. At this time, the space between the movable tube and the suction tube is reduced, so that the solution inside the movable tube is squeezed out. Under the extrusion effect, the impurities blocked inside the suction port are pushed out, thus completing the unblocking function.

[0030] Since the water flow at the preset position has a tendency to flow into the extension groove, the pushed out impurities will be discharged from the drain outlet along the water flow and will not flow back into the overflow tank.

[0031] In a second aspect, the present invention provides a control method for a pretreatment device for galvanizing a Dacromet steel wire, the control method comprising the following steps:

[0032] When the adjustment conditions are met, the position information of the suction port is obtained in real time;

[0033] The position information is compared with the preset position information, and when the position information is the same as the preset position information, the solenoid valve is controlled to close;

[0034] Among them, by setting an encoder on the electric cylinder, the extension length of the electric cylinder is detected in real time, so as to determine the position information of the suction port; when the extension length of the electric cylinder reaches the length required for the preset position, it is determined that the preset position has been reached, and at this time, the solenoid valve is controlled to close.

[0035] Preferably, the control method further comprises the following steps:

[0036] Get the moving direction information of the movable tube;

[0037] Determine whether the adjustment condition is met according to the moving direction information of the movable tube, and when the moving direction of the movable tube is downward movement, the adjustment condition is met;

[0038] Among them, the moving direction of the movable tube is determined by identifying the change in the extension length of the electric cylinder;

[0039] When the extended length decreases, it is determined that the movable tube moves upward, and when the extended length increases, it is determined that the movable tube moves downward.

[0040] Compared with the prior art, the present invention has the following beneficial effects:

[0041] 1. The present invention adds an extension groove to the bottom of the overflow pool, and the bottom of the overflow pool is provided with a guide surface, which is in an inclined state and is used to guide the deposited impurities into the extension groove. Since the height of the extension groove is lower than the bottom of the overflow pool, the internal solution is less disturbed from above, so that impurities are more easily deposited.

[0042] Second, by setting up the suction component, the suction component can actively absorb the impurities suspended in the overflow tank, further reducing the impurity content in the overflow tank, which is beneficial to ensure the plating quality.

[0043] 3. When the suction port drops to the preset position, the solenoid valve is controlled to close. At this time, the suction effect at the suction port disappears, and some impurities that are not firmly attached will fall directly and flow along the water flow to the drain port; then, the movable tube is pushed down continuously. At this time, the space inside the movable tube and the suction tube is reduced, thereby squeezing out the solution inside. Under the extrusion effect, it is helpful to push out the impurities blocked inside the suction port, thereby completing the dredging function; since the water flow at the preset position has a tendency to flow into the extension groove, the pushed out impurities will be discharged from the drain port along the water flow and will not flow back into the overflow tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0045] Figure 2 It is a schematic diagram of the overall cross-sectional structure of the present invention.

[0046] Figure 3 It is a schematic diagram of the cross-sectional structure of the suction tube and the movable tube of the present invention.

[0047] Figure 4 For the present invention Figure 3 A in the figure is an enlarged structural diagram.

[0048] Figure 5 It is a schematic diagram of the plugging tube structure of the present invention.

[0049] Figure 6 It is a flow chart of the control method of the present invention.

[0050] In the figure: 1. collecting tank; 2. overflow tank; 3. extension groove; 4. guide surface; 5. drainage hole; 6. suction pipe; 7. movable pipe; 8. suction port; 9. connecting plate; 10. electric cylinder; 11. solenoid valve; 12. blocking pipe; 13. blocking ring; 14. strip groove; 15. limit pin; 16. first magnet; 17. second magnet; 18. threaded ring; 19. shielding ring; 20. connecting groove; 21. support ring; 22. pulling spring. DETAILED DESCRIPTION

[0051] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art may think of other obvious variations.

[0052] like Figures 1 to 5 The pretreatment equipment for galvanizing Dacromet steel wire shown in the figure comprises a collecting tank 1 and an overflow tank 2, wherein the overflow tank 2 is fixed inside the collecting tank 1, and further comprises:

[0053] An extension groove 3 is provided at the bottom of the overflow tank 2;

[0054] A guide surface 4, which is arranged on the bottom surface of the overflow tank 2 and located on both sides of the extension groove 3;

[0055] A plurality of suction components, one end of each suction component is connected to the outside of the overflow tank 2, and the other end of the suction component is used to absorb micro impurities in the overflow tank 2;

[0056] A processing terminal, the processing terminal is used to control the suction height of the suction component to absorb micro impurities at multiple positions in the overflow tank 2;

[0057] Specifically, in the process of plating or assisting plating by overflow, although most of the impurities will be discharged from the overflow tank with the solution at the overflow, there are still heavier impurities that may settle inside the overflow tank; unlike ordinary plating tanks, the external solution will continue to enter the overflow tank, causing the solution inside the overflow tank to always be in a flowing state, which makes it difficult for these impurities to settle and float to the height of overflow discharge. These impurities flow freely in the overflow tank and are easy to stick to the surface of the steel wire, affecting the plating quality;

[0058] During the plating process, the external plating solution is input into the overflow tank 2, and the plating solution in the overflow tank 2 flows out from the overflow port and enters the collecting tank 1. The plating solution in the collecting tank 1 is filtered by a filtering device and then discharged into the overflow tank 2, thereby completing the circulation of the plating solution. During the overflow process, the impurities floating in the overflow tank 2 can also be discharged into the collecting tank 1 under the overflow effect, thereby completing the removal of the impurities.

[0059] However, some heavier impurities may be difficult to reach the overflow height. Therefore, special treatment is required for this type of impurities. The present invention adds an extension groove 3 at the bottom of the overflow pool 2, and a guide surface 4 is provided at the bottom of the overflow pool 2. The guide surface 4 is in an inclined state and is used to guide the deposited impurities to the inside of the extension groove 3. Since the height of the extension groove 3 is lower than the bottom of the overflow pool 2, the internal solution is less disturbed from above, so that impurities are more easily deposited.

[0060] The water inlet of the overflow tank can also be arranged at a higher position of the guide surface 4, so as to facilitate flushing impurities into the extension groove 3;

[0061] And by setting the suction component, the suction component can actively absorb the impurities suspended in the overflow tank 2, further reducing the impurity content in the overflow tank 2, which is beneficial to ensure the plating quality;

[0062] Furthermore, by adjusting the suction height of the suction component, it is also beneficial to increase its suction range.

[0063] On the other hand, since the solution in the extension groove 3 lacks fluidity, the temperature drops quickly. In order to maintain the uniformity of the solution temperature, the present invention proposes the following embodiments, which also include:

[0064] A drainage hole 5 is provided on the side wall of the extension groove 3, and the drainage hole 5 is located at the bottom end of the side wall of the extension groove 3;

[0065] Specifically, by opening the drainage hole 5 on the side wall of the extension groove 3, part of the solution in the overflow pool 2 has a tendency to flow into the extension groove 3, thereby accelerating the fluidity of the solution in the extension groove 3, which is conducive to ensuring the uniformity of the temperature in the extension groove 3 and avoiding the internal temperature being too low, which will have an adverse effect on the overall plating solution;

[0066] Under the action of flow, the deposited impurities can actively enter the extension groove 3, and a drainage hole 5 is opened on the side wall of the extension groove 3. Since the drainage hole 5 has a large diameter, the deposited impurities can be discharged into the collection tank 1 through the drainage hole 5 for active discharge.

[0067] As a further embodiment of the present invention, the suction assembly comprises:

[0068] A plurality of suction tubes 6, one end of each suction tube 6 is fixed on the outer wall of the extension groove 3, and each suction tube 6 is connected to the outside;

[0069] A plurality of movable tubes 7, each of which is sleeved on the outside of the suction tube 6, a plurality of suction ports 8 are opened on the top side wall of each movable tube 7, and a connecting plate 9 is fixed to the top of all movable tubes 7;

[0070] The electric cylinder 10 is fixed on the outer wall of the overflow tank 2, and the movable end of the electric cylinder 10 is fixed to the connecting plate 9;

[0071] After the solution enters from the suction port 8 of the movable tube 7, it flows along the inside of the movable tube 7 to the inside of the suction tube 6, and finally flows out from the end of the suction tube 6. Impurities enter with the solution and are discharged from the end of the suction tube 6.

[0072] By starting the electric cylinder 10, the electric cylinder 10 drives the connecting plate 9 to move up and down, drives the movable tube 7 to move up and down, thereby causing the suction port 8 to move up and down. By changing the suction position, impurities suspended in the solution at different heights can be sucked, thereby facilitating the absorption of more suspended impurities and reducing the contact opportunity between the impurities and the steel wire, thereby ensuring the plating quality.

[0073] However, some large particles of impurities may be adsorbed by the suction port 8 during the downward sedimentation process, resulting in clogging of the suction port 8. Therefore, the present invention proposes the following implementation mode, wherein the top of the suction pipe 6 is lower than the connection position between the extension tank 3 and the overflow tank 2, and an electromagnetic valve 11 is further provided in the suction pipe 6. The processing terminal is also used to control the electromagnetic valve 11 to close when the suction port 8 descends to a preset position;

[0074] The preset position can be designed according to user needs, but the preset position is located below the connection position between the extension tank 3 and the overflow tank 2 and above the top of the suction tube 6, so that the water flow at the preset position has a tendency to flow into the extension tank 3;

[0075] When the suction port 8 drops to the preset position, the control solenoid valve 11 is closed. At this time, the suction effect at the suction port 8 disappears, and some impurities that are not firmly adhered will fall directly and flow along the water flow to the drain port.

[0076] Then, the movable tube 7 is pushed down continuously. At this time, the space between the movable tube 7 and the suction tube 6 is reduced, so that the solution inside the movable tube 7 is squeezed out. Under the extrusion effect, the impurities blocked inside the suction port 8 are pushed out, thus completing the unblocking function.

[0077] Since the water flow at the preset position has a tendency to flow into the extension groove 3 , the pushed out impurities will be discharged from the drain port along the water flow and will not flow back into the overflow tank 2 .

[0078] Since the top of the suction pipe 6 is lower than the connection position between the extension tank 3 and the overflow tank 2, when the suction pipe 6 rises, the suction port 8 will first absorb the impurities inside the extension tank 3;

[0079] Since the deposited impurities will be deposited inside the extension groove 3, most of the impurities in the extension groove 3 are heavy large particles, and the suction port 8 is easily blocked during suction. Therefore, the present invention proposes the following embodiment, a temporary blocking component is provided between the movable pipe 7 and the suction pipe 6, and the temporary blocking component includes:

[0080] A plugging tube 12, which is inserted at the top of the suction tube 6, and a plugging ring 13 is fixed at the top of the plugging tube 12;

[0081] A strip groove 14 is provided on the outer wall of the blocking tube 12, a limiting pin 15 is inserted into the strip groove 14, and the limiting pin 15 is fixed on the movable tube 7;

[0082] The magnet mechanism includes a first magnet 16 and a second magnet 17. The first magnet 16 is fixed on the top of the blocking ring 13, and the second magnet 17 is fixed on the top of the movable tube 7;

[0083] In the process of the movable tube 7 descending, the blocking tube 12 is at the top of the suction tube 6, and will not have an adverse effect on the dredging function of the suction port 8. When the suction port 8 moves to the lowest position, the blocking ring 13 on the blocking tube 12 blocks the inner side of the suction port, and in the blocking process, the first magnet 16 and the second magnet 17 gradually approach each other to complete the adsorption function, so that the blocking ring 13 and the movable tube 7 are magnetically fixed. When the movable tube 7 rises, under the action of magnetic attraction, the blocking ring 13 and the blocking tube 12 can rise synchronously with the movable tube 7, so that the blocking tube 12 can also be temporarily blocked during the rising process;

[0084] And during the rising process, the limit pin 15 slides in the strip groove 14. The limit pin 15 cooperates with the strip groove 14 to limit the movable tube 7, thereby preventing the blocking tube 12 from continuing to rise with the movable tube 7. After being limited by the limit pin 15, as the movable tube 7 rises, the blocking tube 12 can gradually separate from the movable tube 7, and finally fall down and reset, thereby avoiding affecting the normal suction of the suction port 8.

[0085] As a further embodiment of the present invention, a threaded ring 18 is fixed in the extension groove 3, a shielding ring 19 is threadedly connected to the threaded ring 18, a connecting groove 20 is opened on the side wall of the shielding ring 19, a support ring 21 is rotatably connected to the bottom of the shielding ring 19, and a tension spring 22 is fixed between the top of the support ring 21 and the threaded ring 18;

[0086] Specifically, by setting the shielding ring 19, when the suction port 8 descends to the predetermined position, the bottom of the connecting plate 9 contacts the top of the shielding ring 19. At this time, one of the suction ports 8 is connected with the connecting groove 20. As the movable tube 7 descends, the connecting plate 9 will drive the shielding ring 19 to move downward synchronously. Under the threaded connection between the shielding ring 19 and the threaded ring 18, the shielding ring 19 will rotate to connect with other suction ports 8, thereby ensuring that only a small number of suction ports 8 are connected each time, and other suction ports 8 are blocked and closed. During the dredging process, the solution is discharged only from a small number of suction ports 8, which is conducive to ensuring that the solution has sufficient impact force to dredge the suction ports 8.

[0087] like Figure 6 A control method for a pretreatment device for galvanizing a Dacromet steel wire is shown, the control method comprising the following steps:

[0088] When the adjustment conditions are met, the position information of the suction port 8 is obtained in real time;

[0089] The position information is compared with the preset position information, and when the position information is the same as the preset position information, the solenoid valve 11 is controlled to close;

[0090] Among them, by setting an encoder on the electric cylinder, the extension length of the electric cylinder is detected in real time, so as to determine the position information of the suction port 8; when the extension length of the electric cylinder reaches the length required for the preset position, it is determined that the preset position has been reached, and at this time, the solenoid valve 11 is controlled to close.

[0091] As a further embodiment of the present invention, the control method further comprises the following steps:

[0092] Get the moving direction information of the movable tube;

[0093] Determine whether the adjustment condition is met according to the moving direction information of the movable tube, and when the moving direction of the movable tube is downward movement, the adjustment condition is met;

[0094] Among them, the moving direction of the movable tube is determined by identifying the change in the extension length of the electric cylinder;

[0095] When the extended length decreases, it is determined that the movable tube moves upward, and when the extended length increases, it is determined that the movable tube moves downward.

[0096] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention, and these changes and improvements fall within the scope of the present invention claimed.

Claims

1. A pretreatment device for galvanizing Dacromet steel wire, comprising a collecting tank (1) and an overflow tank (2), wherein the overflow tank (2) is fixed inside the collecting tank (1), characterized in that: Also includes: An extension groove (3), wherein the extension groove (3) is provided at the bottom of the overflow tank (2); A guide surface (4), the guide surface (4) being arranged on the bottom surface of the overflow pool (2) and located on both sides of the extension groove (3); A plurality of suction components, one end of each suction component being in communication with the outside of the overflow tank (2), and the other end of the suction component being used to absorb micro impurities in the overflow tank (2); A processing terminal, the processing terminal is used to control the suction height of the suction component to absorb micro impurities at multiple positions in the overflow tank (2); The suction assembly comprises: A plurality of suction tubes (6), one end of each suction tube (6) being fixed on the outer wall of the extension groove (3), and each suction tube (6) being in communication with the outside; A plurality of movable tubes (7), each of the movable tubes (7) being sleeved on the outside of the suction tube (6), a plurality of suction ports (8) being provided on the top side wall of each movable tube (7), and a connecting plate (9) being fixed to the tops of all the movable tubes (7); An electric cylinder (10), the electric cylinder (10) being fixed on the outer wall of the overflow tank (2), and the movable end of the electric cylinder (10) being fixed to the connecting plate (9); The top end of the suction pipe (6) is lower than the connection position between the extension groove (3) and the overflow tank (2), and a solenoid valve (11) is also provided in the suction pipe (6). The processing terminal is also used to control the solenoid valve (11) to close when the suction port (8) descends to a preset position; A temporary blocking component is provided between the movable tube (7) and the suction tube (6), and the temporary blocking component comprises: A blocking tube (12), the blocking tube (12) being inserted into the top end of the suction tube (6), and a blocking ring (13) being fixed to the top of the blocking tube (12); A strip groove (14), the strip groove (14) being formed on the outer wall of the blocking tube (12), a limiting pin (15) being inserted into the strip groove (14), and the limiting pin (15) being fixed on the movable tube (7); A magnet mechanism, the magnet mechanism comprising a first magnet (16) and a second magnet (17), the first magnet (16) being fixed on the top of the sealing ring (13), and the second magnet (17) being fixed on the top of the movable tube (7).

2. A pretreatment equipment for galvanizing Dacromet steel wire according to claim 1, characterized in that: Also includes: A drainage hole (5), wherein the drainage hole (5) is formed on the side wall of the extension groove (3), and the drainage hole (5) is located at the bottom end of the side wall of the extension groove (3).

3. A pretreatment equipment for galvanizing Dacromet steel wire according to claim 1, characterized in that: A threaded ring (18) is fixed in the extension groove (3), a shielding ring (19) is connected to the threaded inner surface of the threaded ring (18), a connecting groove (20) is provided on the side wall of the shielding ring (19), a support ring (21) is rotatably connected to the bottom of the shielding ring (19), and a pulling spring (22) is fixed between the top of the support ring (21) and the threaded ring (18).

4. A control method for a pretreatment device for galvanizing a Dacromet steel wire, applicable to a pretreatment device for galvanizing a Dacromet steel wire as claimed in claim 3, characterized in that: The control method comprises the following steps: When the adjustment conditions are met, the position information of the suction port (8) is obtained in real time; The position information is compared with the preset position information, and when the position information is the same as the preset position information, the solenoid valve (11) is controlled to close.

5. The control method of a pretreatment device for galvanizing Dacromet steel wire according to claim 4, characterized in that: The control method also includes the following steps: Get the moving direction information of the movable tube; Whether the adjustment condition is met is determined according to the moving direction information of the movable tube. When the moving direction of the movable tube is downward movement, the adjustment condition is met.

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