A galvanized pipe surface passivation treatment device and control method thereof

Abstract

The present invention relates to the technical field of galvanized pipe passivation, and in particular to a galvanized pipe surface passivation treatment device and a control method thereof, comprising a passivation tank, and also comprising: two mounting frames symmetrically fixedly mounted on the passivation tank; a support plate fixedly mounted between the two mounting frames; a plurality of target flip support assemblies arranged on the support plate, for supporting and limiting the galvanized pipe, and driving the galvanized pipe to rotate. The present invention, through the arrangement of the end passivation assembly, on the one hand removes excess passivation liquid on the surface of the galvanized pipe, helps to accelerate the cooling of the passivation layer, and makes the passivation layer solidify quickly, thereby controlling the thickness of the passivation layer; on the other hand, during the downward movement of the ring blowing assembly, the excess passivation liquid on the outer wall of the galvanized pipe will be simultaneously pushed toward the direction of the end passivation assembly, thereby helping the end passivation assembly to collect the passivation liquid again, and preparing for the subsequent end passivation of the galvanized pipe.

Description

Technical Field

[0001] The invention relates to the field of galvanized pipe passivation, and in particular to a galvanized pipe surface passivation treatment device and a control method thereof. Background Art

[0002] The surface passivation of galvanized pipes is a technology that uses chemical methods to form a dense protective film on the metal surface to improve the corrosion resistance of the metal. The principle of galvanizing passivation is based on the electrochemical corrosion and chemical reaction of metals. By covering the metal surface with a layer of zinc and passivating the surface of the galvanized layer, an inactive compound film is formed, thereby reducing the contact between the metal and the external environment and achieving the purpose of corrosion protection.

[0003] The prior art discloses some invention patents for the passivation of the surface of galvanized pipes. The Chinese invention patent with application number 202210098938.6 discloses a surface passivation treatment device for galvanized pipes, including a support frame, a mounting plate, a slide rail, a slider, a nozzle, a conduit, a storage mechanism and a moving mechanism. A mounting plate is provided on the front side of the support frame, and slide rails are provided on the upper and lower sides of the mounting plate. Slide rails are slidably provided on the right side of the slide rail, and a nozzle is provided between the inner sides of the two sliders.

[0004] After the steel pipe is galvanized, it is usually passivated to improve its durability. At present, spray passivation is a widely used method, which is achieved by spraying passivation liquid. However, this method has certain limitations when processing the ends of galvanized pipes. Due to the special position of the ends, it is difficult for the passivation liquid to cover evenly, which may lead to poor passivation effect on the ends. Summary of the invention

[0005] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a galvanized pipe surface passivation treatment device and a control method thereof.

[0006] To achieve the above objectives, in a first aspect, the present invention provides a galvanized pipe surface passivation treatment device, including a passivation tank, and also including:

[0007] Two mounting frames are symmetrically fixedly mounted on the passivation tank;

[0008] A support plate, fixedly installed between the two mounting frames;

[0009] A plurality of target flip support components are arranged on the support plate, and are used to support and limit the galvanized pipe and drive the galvanized pipe to rotate;

[0010] A spray assembly, disposed between the two mounting frames, for spraying a passivation liquid on the galvanized pipe;

[0011] Ring blowing assembly is used to blow away the excess passivation liquid on the surface of the galvanized pipe after spraying, so that the passivation layer on the surface of the galvanized pipe is evenly distributed;

[0012] An end passivation component is arranged inside the passivation tank, and is used to collect excess passivation liquid during the operation of the ring blowing component, and to passivate the end of the galvanized pipe to form a passivation layer after the ring blowing component is completed;

[0013] Among them, after the passivation of the galvanized pipe is completed, the ring blowing component starts to work, and the excess passivation liquid on the outer wall of the galvanized pipe will be further blown through the ring blowing component. The high-speed airflow generated by the ring blowing component can remove the excess passivation liquid on the surface of the galvanized pipe, which helps to accelerate the cooling of the passivation layer and make the passivation layer solidify quickly, thereby controlling the thickness of the passivation layer. On the other hand, during the downward movement of the ring blowing component, the excess passivation liquid on the outer wall of the galvanized pipe will be pushed toward the end passivation component, thereby helping the end passivation component to collect the passivation liquid again, in preparation for the subsequent passivation of the end of the galvanized pipe.

[0014] Preferably: the target flip support assembly comprises:

[0015] A motor is fixedly mounted on the top of the support plate;

[0016] A rectangular column, wherein the rectangular column is fixedly mounted on an output shaft end of the motor;

[0017] A plurality of electric push rods are respectively fixedly mounted on the four faces of the rectangular column;

[0018] A plurality of arc-shaped supporting blocks are respectively fixedly mounted on the telescopic ends of the electric push rod at corresponding positions.

[0019] Preferably: the end passivation assembly comprises:

[0020] A hydraulic cylinder, fixedly installed inside the passivation tank;

[0021] A connecting plate, slidably connected to the inner wall of the passivation tank and fixedly connected to the telescopic end of the hydraulic cylinder;

[0022] A rectangular block, fixedly mounted on the connecting plate;

[0023] An annular groove is provided on the top of the rectangular block;

[0024] A plurality of electric cylinders are installed inside the annular groove;

[0025] A circular ring, fixedly mounted on the telescopic end of the electric cylinder;

[0026] An annular shallow groove is arranged on the circular ring.

[0027] Preferably: also include:

[0028] A plurality of elastic telescopic rods are fixedly installed in a circular array inside the annular shallow groove;

[0029] An annular plate, fixedly mounted on the telescopic end of the elastic telescopic rod, and the annular plate is located inside the annular shallow groove;

[0030] A plurality of flow grooves are arranged on the annular shallow groove;

[0031] In the initial state, the annular plate blocks the entire flow groove.

[0032] Preferably: also include:

[0033] An air blower pump is fixedly mounted on the top of the rectangular block;

[0034] The annular air blowing knife is fixedly connected to the air blowing pump through a hard pipe, and the annular air blowing knife is fixedly connected to the rectangular block.

[0035] Preferably: also include:

[0036] A plurality of support rods are fixedly installed on the inner wall of the passivation tank in a linear array;

[0037] A plurality of shielding plates are respectively fixedly connected to the support rods at corresponding positions, and the shielding plates are located between two adjacent galvanized pipes.

[0038] Preferably, the spray assembly comprises a driving assembly and a liquid storage barrel, the driving assembly is used to drive the liquid storage barrel to move back and forth, and the liquid storage barrel is fixedly connected to a liquid spray head through a liquid spray pipe.

[0039] In a second aspect, the present invention provides a control method for a galvanized pipe surface passivation treatment device, the control method comprising the following steps:

[0040] Obtaining the passivation layer thickness parameter of the target workpiece after passivation is completed;

[0041] A threshold is set in advance, and the obtained passivation layer thickness parameter is compared with the threshold to obtain standard-compliant information and non-standard-compliant information;

[0042] No feedback after receiving information that meets the standards;

[0043] After obtaining the information that the standard is not met, the specific passivation time for the current target workpiece to be secondary passivated is determined;

[0044] Control the passivation equipment to passivate the parts of the target workpiece that do not meet the relevant standards for a specified time.

[0045] Preferably, the step of determining the specific passivation time of the portion of the current target workpiece that needs to be passivated is:

[0046] Acquire first parameter information, the first parameter information at least including current ambient temperature information T a , current ambient humidity information T B , current passivation solution concentration information T C And the passivation layer thickness T of the current target workpiece after the first passivation 1 ;

[0047] According to the formula T=T 0 ×(1+T a ×(T e -T s ))×(1+T B ×(R e -R s ))×(1+T C ×(C s -C 0 ))×(1+K a ×(T 1 -T 2 )), calculate the actual passivation time required for the target workpiece;

[0048] Where: T is the actual passivation time required; T 0 is the benchmark passivation time, i.e. the passivation time under standard environmental conditions; T a Ambient temperature adjustment factor; T B Relative humidity adjustment factor; T C is the passivation solution concentration adjustment factor;

[0049] T e is the actual ambient temperature; R e is the relative humidity of the environment; C s is the actual concentration of the passivation solution; C 0 is the standard concentration of the passivation solution; T s With R s is the standard ambient temperature and relative humidity, used to calculate the adjustment factor;

[0050] K a It is the passivation film thickness adjustment factor, which is a coefficient determined based on experimental data or experience, and reflects the degree of influence on the passivation time when the passivation film thickness changes by one unit;

[0051] T 1 is the thickness of the passivation film formed after the first passivation, T 2 The typical thickness of the passive film expected under standard conditions.

[0052] Compared with the prior art, the present invention has the following beneficial effects:

[0053] 1. The present invention sets an end passivation component. After the ring blowing component is finished working, the end passivation component starts working. Because the end passivation component receives and collects excess passivation liquid, the end passivation component will passivate the end of the galvanized pipe after contacting the end of the galvanized pipe, so as to help ensure that a uniform passivation layer can also be formed on the end. In addition, by passivating the end, on the one hand, it helps to ensure that the end of the entire galvanized pipe has a uniform passivation layer, thereby improving the overall corrosion resistance. On the other hand, the end passivation component helps to ensure that the end passivation time is long enough to form a stable passivation layer, thereby improving the service life of the entire galvanized pipe.

[0054] 2. The present invention sets an annular shallow groove. After the annular blowing assembly is purged, the electric cylinder is controlled to start, and the circular ring is pushed by the electric cylinder to move toward the end of the galvanized pipe, so that the circular ring moves out from the inside of the annular groove. Because the inside of the annular groove is pre-placed with passivation liquid, the inside of the annular shallow groove must be filled with passivation liquid, which helps to passivate the end of the galvanized pipe. As the annular shallow groove moves toward the end of the galvanized pipe, the passivation liquid inside the annular shallow groove will contact the end of the galvanized pipe, and the passivation time can be pre-set, which helps to complete the passivation of the end of the galvanized pipe according to actual conditions, and then helps to form a stable passivation layer.

[0055] 3. The present invention arranges an annular plate. After the annular plate moves toward the end of the galvanized pipe and contacts therewith, the annular plate will be subjected to force to generate relative movement with the annular shallow groove. The annular plate will compress the elastic telescopic rod to make way. In the process of making way, the flow groove will gradually be exposed. Because the flow groove is connected with the annular groove and the annular shallow groove, the passivation liquid inside the annular shallow groove will flow back into the interior of the annular groove through the flow groove, thereby helping to prevent the passivation liquid from extending upward along the outer wall of the galvanized pipe after the end of the galvanized pipe contacts the passivation liquid inside the annular shallow groove, causing uneven distribution of the passivation layer of the galvanized pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] Figure 1 It is a flow chart of the control method of the present invention.

[0057] Figure 2 The overall structure of the detection device of the present invention is shown in FIG. Figure 1 .

[0058] Figure 3 The overall structure of the detection device of the present invention is shown in FIG. Figure 2 .

[0059] Figure 4 For the present invention Figure 3 An enlarged schematic diagram of the structure of section A is shown.

[0060] Figure 5 It is a schematic diagram of the structure of the present invention along the cross section of the passivation tank.

[0061] Figure 6 It is a schematic diagram of the structure of the connection between the rectangular block and the air pump of the present invention.

[0062] Figure 7 For the present invention Figure 6 An enlarged schematic diagram of the structure of part B is shown.

[0063] Figure 8 It is a schematic diagram of the structure of the rectangular block of the present invention.

[0064] Fig. 9 It is a schematic diagram of the structure of the present invention after being cut along a rectangular block.

[0065] Fig.10 It is a schematic diagram of the structure of the present invention after being cut along a circular ring.

[0066] Fig.11 It is a schematic structural diagram of the shielding plate of the present invention.

[0067] In the figure: 1. passivation tank; 2. mounting frame; 3. support plate; 4. motor; 5. rectangular column; 6. electric push rod; 7. arc-shaped top holding block; 8. hydraulic cylinder; 9. connecting plate; 10. rectangular block; 11. annular groove; 12. electric cylinder; 13. circular ring; 14. annular shallow groove; 15. elastic telescopic rod; 16. annular plate; 17. flow groove; 18. air pump; 19. annular air blowing knife; 20. support rod; 21. shielding plate; 22. drainage groove; 23. liquid storage barrel; 24. spray head; 25. driving motor; 26. threaded rod; 27. threaded seat. DETAILED DESCRIPTION

[0068] 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.

[0069] Application scenario: After the steel pipe has completed the galvanizing process, in order to improve its durability, it is usually necessary to perform passivation treatment. At present, spray passivation is a widely used method, which is achieved by spraying passivation liquid. However, this method has certain limitations when processing the ends of galvanized pipes. Due to the special position of the ends, the passivation liquid is difficult to cover evenly, which may lead to poor passivation effect at the ends.

[0070] like Figures 2 to 11 The galvanized pipe surface passivation treatment equipment shown includes a passivation tank 1 and also includes:

[0071] Two mounting frames 2 are symmetrically fixedly mounted on the passivation tank 1;

[0072] A support plate 3 is fixedly installed between two mounting frames 2;

[0073] A plurality of target flip support components are arranged on the support plate 3, and are used to support and limit the galvanized pipe and drive the galvanized pipe to rotate;

[0074] A spray assembly, arranged between the two mounting frames 2, for spraying a passivation liquid on the galvanized pipe;

[0075] Ring blowing assembly is used to blow away the excess passivation liquid on the surface of the galvanized pipe after spraying, so that the passivation layer on the surface of the galvanized pipe is evenly distributed;

[0076] The end passivation assembly is arranged inside the passivation tank 1. During the operation of the ring blowing assembly, it is used to collect excess passivation liquid, and after the ring blowing assembly is completed, the end of the galvanized pipe is passivated to form a passivation layer.

[0077] In a specific implementation, the galvanized pipe to be passivated is placed at a designated position, and the positioning is completed by the target flip support assembly. After the positioning is completed, the target flip support assembly is controlled to drive the galvanized pipe to rotate. During this process, the spray assembly is controlled to spray the passivation liquid on the galvanized pipe in the rotating process. During the process of the galvanized pipe being driven to rotate by the target flip support assembly, the spray assembly can evenly spray the passivation liquid on the outer wall of the galvanized pipe to help the galvanized pipe to complete the passivation. At the same time, the excess passivation liquid will flow downward along the outer wall of the galvanized pipe. The end passivation assembly can be provided to help collect the excess passivation liquid that is not absorbed by the inner wall of the galvanized pipe during the spraying process, thereby helping to improve the utilization rate of the passivation liquid.

[0078] After the passivation of the galvanized pipe is completed, the ring blowing component starts working, and the excess passivation liquid on the outer wall of the galvanized pipe is further blown through the ring blowing component. The high-speed airflow generated by the ring blowing component removes the excess passivation liquid on the surface of the galvanized pipe, which helps to accelerate the cooling of the passivation layer and make the passivation layer solidify quickly, thereby controlling the thickness of the passivation layer. On the other hand, when the ring blowing component moves downward, it will simultaneously push the excess passivation liquid on the outer wall of the galvanized pipe toward the end passivation component, thereby helping the end passivation component to collect the passivation liquid again, preparing for the subsequent end passivation of the galvanized pipe;

[0079] After the ring blowing assembly is completed, the end passivation assembly starts working. Because the end passivation assembly receives and collects excess passivation liquid, the end passivation assembly will passivate the end of the galvanized pipe after contacting the end of the galvanized pipe, so as to ensure that a uniform passivation layer can be formed on the end. In addition, by passivating the end, on the one hand, it helps to ensure that the end of the entire galvanized pipe has a uniform passivation layer, thereby improving the overall corrosion resistance. On the other hand, the end passivation assembly helps to ensure that the end passivation time is long enough to form a stable passivation layer, thereby increasing the service life of the entire galvanized pipe.

[0080] It should be noted that the ring blowing assembly includes existing components such as an annular air knife, an air pump, and an electric push rod, and each adjacent two annular air knives are fixedly connected by a supporting connecting frame, the electric push rod is fixedly connected to the support plate 3, and a top holding plate is fixedly connected to the outer wall of the annular air knife, and the telescopic end of the electric push rod is fixedly connected to the top holding plate, and then the annular air knife can be synchronously pushed upward or downward by pushing the top holding plate by the electric push rod, which will not be elaborated here.

[0081] As a technical optimization solution of the present invention: the target flip support assembly includes:

[0082] The motor 4 is fixedly mounted on the top of the support plate 3;

[0083] A rectangular column 5, which is fixedly mounted on the output shaft end of the motor 4;

[0084] A plurality of electric push rods 6 are respectively fixedly mounted on the four faces of the rectangular column 5;

[0085] A plurality of arc-shaped top holding blocks 7 are respectively fixedly mounted on the telescopic ends of the electric push rods 6 at corresponding positions;

[0086] In the specific implementation, firstly, all the electric push rods 6 are controlled to start, and the electric push rods 6 will push the arc-shaped top holding block 7 at the corresponding position to move toward the inner side wall of the galvanized pipe, so that the arc-shaped top holding block 7 is in conflict with the side wall of the galvanized pipe, and the arc-shaped top holding block 7 is made of deformable material, such as rubber and other deformable materials, which is conducive to the arc-shaped top holding block 7 to better contact with the inner wall of the galvanized pipe. After the arc-shaped top holding block 7 contacts the inner wall of the galvanized pipe, a reaction force is generated. This reaction force can be used to limit the position or movement of the galvanized pipe, thereby realizing the limiting function, and then the motor 4 is started, and the rectangular column 5 is driven to rotate by the motor 4. The rectangular column 5 drives the arc-shaped top holding block 7 to rotate through the electric push rod 6, and the arc-shaped top holding block 7 drives the galvanized pipe to rotate, which helps the spray assembly to spray passivation liquid on the outer wall of the galvanized pipe.

[0087] As a technical optimization solution of the present invention: the end passivation component includes:

[0088] The hydraulic cylinder 8 is fixedly installed inside the passivation tank 1;

[0089] The connecting plate 9 is slidably connected to the inner wall of the passivation tank 1 and fixedly connected to the telescopic end of the hydraulic cylinder 8;

[0090] The rectangular block 10 is fixedly mounted on the connecting plate 9;

[0091] An annular groove 11 is provided on the top of the rectangular block 10;

[0092] A plurality of electric cylinders 12 are installed inside the annular groove 11;

[0093] The ring 13 is fixedly mounted on the telescopic end of the electric cylinder 12;

[0094] An annular shallow groove 14 is provided on the ring 13;

[0095] In a specific implementation, an appropriate amount of passivation liquid is placed in the annular groove 11 in advance, and the passivation liquid is collected through the annular groove 11 and the annular shallow groove 14. During the collection process, the annular shallow groove 14 will be filled with the passivation liquid. After the annular blowing assembly is purged, the electric cylinder 12 is controlled to start, and the circular ring 13 is pushed by the electric cylinder 12 to move toward the end of the galvanized pipe, so that the circular ring 13 moves out from the annular groove 11. Because the passivation liquid is placed in the annular groove 11 in advance, the annular shallow groove 14 must be filled with the passivation liquid, which helps to passivate the end of the galvanized pipe. As the annular shallow groove 14 moves toward the end of the galvanized pipe, the passivation liquid inside the annular shallow groove 14 will contact the end of the galvanized pipe, and the passivation time can be set in advance, which helps to complete the passivation of the end of the galvanized pipe according to actual conditions, and then helps to form a stable passivation layer.

[0096] As a technical optimization solution of the present invention: it also includes:

[0097] A plurality of elastic telescopic rods 15 are fixedly installed in a circular array inside the annular shallow groove 14;

[0098] The annular plate 16 is fixedly mounted on the telescopic end of the elastic telescopic rod 15, and the annular plate 16 is located inside the annular shallow groove 14;

[0099] A plurality of flow grooves 17 are provided on the annular shallow groove 14;

[0100] In the initial state, the annular plate 16 blocks all the flow slots 17;

[0101] In the specific implementation, the above example explains that the passivation liquid is received by the annular shallow groove 14 to passivate the end of the galvanized pipe. However, because the annular shallow groove 14 has a certain depth, after the end of the galvanized pipe enters the annular shallow groove 14, when the end of the galvanized pipe is immersed in the passivation liquid, it will displace a part of the passivation liquid, so that part of the passivation liquid will flow upward to the outer wall of the galvanized pipe, which will cause the passivation layer on the outer surface of the galvanized pipe to be unevenly passivated.

[0102] Therefore, when the annular shallow groove 14 moves toward the end of the galvanized pipe, the annular plate 16 will also be driven to move upward. The annular plate 16 is sealed and connected to the inside of the annular shallow groove 14 to prevent the loss of passivation liquid from affecting the passivation effect. After the annular plate 16 moves toward the end of the galvanized pipe and contacts it, the annular plate 16 is subjected to force to produce relative movement with the annular shallow groove 14. The annular plate 16 will compress the elastic telescopic rod 15 to make way. In the process of making way, the flow groove 17 will gradually be exposed. Because the flow groove 17 is connected to the annular groove 11 and the annular shallow groove 14, the passivation liquid inside the annular shallow groove 14 will flow back into the annular groove 11 through the flow groove 17, thereby helping to prevent the passivation liquid from extending upward along the outer wall of the galvanized pipe after the end of the galvanized pipe contacts the passivation liquid inside the annular shallow groove 14, causing uneven distribution of the passivation layer of the galvanized pipe.

[0103] As a technical optimization solution of the present invention: it also includes:

[0104] The air blower 18 is fixedly mounted on the top of the rectangular block 10;

[0105] The annular air blowing knife 19 is fixedly connected to the air blowing pump 18 through a hard pipe, and the annular air blowing knife 19 is fixedly connected to the rectangular block 10;

[0106] In a specific implementation, before the end of the galvanized pipe contacts the annular plate 16, the blow pump 18 is controlled to start, and the blow pump 18 delivers high-pressure airflow to the annular air knife through a hard pipe. The blowing direction of the annular air knife is inclined toward the end of the passivation pipe. Therefore, when the end of the galvanized pipe contacts the annular plate 16, the annular air knife will apply a blowing force to the outer wall near the end of the galvanized pipe. On the one hand, when the annular plate 16 and the inner part of the annular shallow groove 14 are relatively displaced, applying high-pressure airflow through the annular air knife helps to inhibit the passivation liquid from flowing upward along the outer wall of the galvanized pipe. On the other hand, after the passivation is completed, the hydraulic cylinder 8 drives the rectangular block 10 to move downward through the connecting plate 9, and the rectangular block 10 drives the blowing pump 18 and the annular blowing knife 19 to move downward, so that a relative displacement is generated between the annular blowing knife 19 and the galvanized pipe, which is beneficial to use the high-pressure airflow generated by the annular blowing knife 19 to blow away the passivation liquid that may adhere to the outer wall of the galvanized pipe near the end, so as to maintain the passivation liquid on the outer wall of the galvanized pipe near the end. The distribution is uniform, which helps to avoid unevenness.

[0107] As a technical optimization solution of the present invention: it also includes:

[0108] A plurality of support rods 20 are fixedly mounted on the inner wall of the passivation tank 1 in a linear array;

[0109] A plurality of shielding plates 21 are respectively fixedly connected to the support rods 20 at corresponding positions, and the shielding plates 21 are located between two adjacent galvanized pipes;

[0110] A drainage groove 22 is provided on the shielding plate 21;

[0111] In a specific implementation, when the target flip support assembly drives the galvanized pipe to rotate, part of the passivation liquid may be swung onto the adjacent galvanized pipe. Therefore, a baffle plate 21 is provided between each two adjacent galvanized pipes to shield the passivation liquid, thereby helping to prevent the passivation liquid from adhering to the outer wall of the adjacent galvanized pipes and causing unevenness. After the passivation liquid reaches the baffle plate 21, it is guided to the interior of the end passivation assembly through the drainage groove 22, thereby helping to better passivate the end of the galvanized pipe later.

[0112] As a technical optimization solution of the present invention: the spray assembly includes a driving assembly and a liquid storage barrel 23, the driving assembly is used to drive the liquid storage barrel 23 to move back and forth, and the liquid storage barrel 23 is fixedly connected to the liquid spray head 24 through the liquid spray pipe;

[0113] In a specific implementation, the liquid storage barrel 23 is driven to move by the driving assembly, and the liquid storage barrel 23 drives the liquid spraying head 24 to move, so that the liquid spraying head 24 reciprocates to spray the passivation liquid on the galvanized pipe, which helps to increase the passivation rate.

[0114] It should be noted that the driving assembly includes a driving motor 25, which is fixedly mounted on the side wall of the mounting frame 2, and a threaded rod 26 is fixedly mounted on the output shaft end of the driving motor 25, and a threaded seat 27 is threadedly connected to the outer wall of the threaded rod 26, and the threaded seat 27 is slidably connected to the side wall of the support plate 3, and the threaded seat 27 is fixedly connected to the liquid storage barrel 23.

[0115] like Figure 1 A control method for a galvanized pipe surface passivation treatment device is shown, and the control method comprises the following steps:

[0116] Obtaining the passivation layer thickness parameter of the target workpiece after passivation is completed;

[0117] A threshold is set in advance, and the obtained passivation layer thickness parameter is compared with the threshold to obtain standard-compliant information and non-standard-compliant information;

[0118] No feedback after receiving information that meets the standards;

[0119] After obtaining the information that the standard is not met, the specific passivation time for the current target workpiece to be secondary passivated is determined;

[0120] Control the passivation equipment to passivate the parts of the target workpiece that do not meet the relevant standards for a specified time.

[0121] It should be noted that the threshold is a pre-set data set, and all values ​​within this data set are considered the threshold.

[0122] It needs to be explained again that the standard information is that the thickness of the passivation layer complies with the relevant standards, and the non-standard information is that the thickness of the passivation layer does not comply with the relevant standards.

[0123] As a technical optimization solution of the present invention, the steps of determining the specific passivation time required for secondary passivation of the current target workpiece are as follows:

[0124] Acquire first parameter information, the first parameter information at least including current ambient temperature information T a , current ambient humidity information T B , current passivation solution concentration information T C And the passivation layer thickness T of the current target workpiece after the first passivation 1 ;

[0125] According to the formula T=T 0 ×(1+T a ×(T e -T s ))×(1+T B ×(R e -R s ))×(1+T C ×(C s -C0 ))×(1+K a ×(T 1 -T 2 )), calculate the actual passivation time required for the target workpiece;

[0126] Where: T is the actual passivation time required; T 0 is the benchmark passivation time, i.e. the passivation time under standard environmental conditions; T a Ambient temperature adjustment factor; T B Relative humidity adjustment factor; T C is the passivation solution concentration adjustment factor;

[0127] T e is the actual ambient temperature; R e is the relative humidity of the environment; C s is the actual concentration of the passivation solution; C 0 is the standard concentration of the passivation solution; T s With R s is the standard ambient temperature and relative humidity, used to calculate the adjustment factor;

[0128] K a It is the passivation film thickness adjustment factor, which is a coefficient determined based on experimental data or experience, and reflects the degree of influence on the passivation time when the passivation film thickness changes by one unit;

[0129] T 1 is the thickness of the passivation film formed after the first passivation, T 2 The typical thickness of the passive film expected under standard conditions.

[0130] It should be understood that the thickness of the passivation layer T of the current target workpiece after the first passivation described above is 1 Secondary passivation is only required when the thickness is less than the standard thickness;

[0131] Each bracketed multiplier in the above formula contains a "1", which represents the baseline condition or initial state, that is, the situation before any adjustments are made. The "1" here is a simple method used in mathematics to maintain proportion and facilitate calculation;

[0132] By adding "1" in front of each adjustment factor, the formula ensures that the spray time remains at the baseline even without any adjustment. When a factor deviates from the baseline condition, the corresponding factor is adjusted according to the deviation, thus affecting the final spray time.

[0133] It should be noted that T 1 is the thickness of the passivation film formed after the first passivation, T 2Taking the expected standard thickness of the passivation film under standard conditions as an example, if the thickness of the passivation film formed after the first passivation is less than the expected standard thickness of the passivation film under standard conditions, the value between the two will be a negative number, and the difference reflects the gap between the actual passivation film thickness and the expected standard thickness. This negative difference will be multiplied by the passivation film thickness adjustment factor K a , which in turn affects the final spray time T. The other parts are explained as above. Based on the above, the formula provides a quantitative feedback mechanism to adjust the spray time by calculating the thickness difference. If the passivation film thickness is insufficient, the passivation process can be optimized by adjusting the spray time in order to achieve the required standard thickness.

[0134] It should be noted that in the actual operation process, when the outer wall of the galvanized pipe is passivated by the passivation equipment, it is inevitable that part of the passivation liquid will contact the end of the galvanized pipe, which will cause a passivation layer to appear on the end of the galvanized pipe, and then affect the subsequent passivation time of the end of the galvanized pipe. How to determine the subsequent specific passivation time is difficult;

[0135] In this embodiment, the current ambient temperature information T a , current ambient humidity information T B , current passivation solution concentration information T C And the passivation layer thickness T of the current target workpiece after the first passivation 1 Taking the factors as influencing factors, starting from the actual situation and taking into full consideration the influence of various factors, a reasonable passivation time can be calculated, which will help to determine the subsequent specific passivation time to enhance the passivation effect of the galvanized pipe.

[0136] It should be noted again that the current ambient temperature information T a , current ambient humidity information T B It is obtained by existing instruments such as temperature and humidity sensors. The current passivation liquid concentration information TC is obtained using a density meter or a specific gravity meter. The thickness of the passivation layer of the current target workpiece after the first passivation is measured using a thickness detector, such as an X-ray fluorescence thickness gauge, an ultrasonic thickness gauge and other instruments. The above information is not listed one by one, and can all be obtained through existing instruments. It is an existing mature technology and will not be elaborated in detail.

[0137] Working principle of the present invention:

[0138] The galvanized pipe that needs to be passivated is placed at the designated position, and the positioning is completed by the target flip support assembly. After the positioning is completed, the target flip support assembly is controlled to drive the galvanized pipe to rotate. During this process, the spray assembly is controlled to spray the passivation liquid on the galvanized pipe in the rotating process. In the process of the galvanized pipe being driven to rotate by the target flip support assembly, the spray assembly can evenly spray the passivation liquid on the outer wall of the galvanized pipe to help the galvanized pipe to complete the passivation. At the same time, the excess passivation liquid will flow downward along the outer wall of the galvanized pipe. The end passivation assembly can be set to help collect the excess passivation liquid that is not absorbed by the inner wall of the galvanized pipe during the spraying process, thereby helping to improve the utilization rate of the passivation liquid.

[0139] After the passivation of the galvanized pipe is completed, the ring blowing component starts working, and the excess passivation liquid on the outer wall of the galvanized pipe is further blown through the ring blowing component. The high-speed airflow generated by the ring blowing component removes the excess passivation liquid on the surface of the galvanized pipe, which helps to accelerate the cooling of the passivation layer and make the passivation layer solidify quickly, thereby controlling the thickness of the passivation layer. On the other hand, when the ring blowing component moves downward, it will simultaneously push the excess passivation liquid on the outer wall of the galvanized pipe toward the end passivation component, thereby helping the end passivation component to collect the passivation liquid again, preparing for the subsequent end passivation of the galvanized pipe;

[0140] After the ring blowing assembly is completed, the end passivation assembly starts working. Because the end passivation assembly receives and collects excess passivation liquid, the end passivation assembly will passivate the end of the galvanized pipe after contacting the end of the galvanized pipe, so as to ensure that a uniform passivation layer can be formed on the end. In addition, by passivating the end, on the one hand, it helps to ensure that the end of the entire galvanized pipe has a uniform passivation layer, thereby improving the overall corrosion resistance. On the other hand, the end passivation assembly helps to ensure that the end passivation time is long enough to form a stable passivation layer, thereby increasing the service life of the entire galvanized pipe.

[0141] 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 galvanized pipe surface passivation treatment device, comprising a passivation tank (1), characterized in that: Also includes: Two mounting frames (2) are symmetrically fixedly mounted on the passivation tank (1); A support plate (3) fixedly mounted between the two mounting frames (2); A plurality of target flip support components are arranged on the support plate (3) and are used to support and limit the galvanized pipe and drive the galvanized pipe to rotate; A spray assembly, arranged between the two mounting frames (2), and used for spraying a passivation liquid on the galvanized pipe; Ring blowing assembly is used to blow away the excess passivation liquid on the surface of the galvanized pipe after spraying, so that the passivation layer on the surface of the galvanized pipe is evenly distributed; An end passivation component is arranged inside the passivation tank (1) and is used to collect excess passivation liquid during the operation of the ring blowing component, and to perform a passivation treatment on the end of the galvanized pipe to form a passivation layer after the ring blowing component is completed; The target flip support assembly comprises: A motor (4) is fixedly mounted on the top of the support plate (3); A rectangular column (5), wherein the rectangular column (5) is fixedly mounted on an output shaft end of the motor (4); A plurality of electric push rods (6) are respectively fixedly mounted on four surfaces of the rectangular column (5); A plurality of arc-shaped top holding blocks (7) are respectively fixedly mounted on the telescopic ends of the electric push rod (6) at corresponding positions, and the arc-shaped top holding blocks (7) are used to limit the position or movement of the galvanized pipe; The end passivation assembly comprises: A hydraulic cylinder (8) fixedly mounted inside the passivation tank (1); A connecting plate (9) is slidably connected to the inner wall of the passivation tank (1) and is fixedly connected to the telescopic end of the hydraulic cylinder (8); A rectangular block (10) fixedly mounted on the connecting plate (9); An annular groove (11) is formed on the top of the rectangular block (10); A plurality of electric cylinders (12) are installed inside the annular groove (11); A circular ring (13) fixedly mounted on the telescopic end of the electric cylinder (12); An annular shallow groove (14) is formed on the circular ring (13); A plurality of elastic telescopic rods (15) are fixedly installed in a circular array inside the annular shallow groove (14); An annular plate (16) is fixedly mounted on the telescopic end of the elastic telescopic rod (15), and the annular plate (16) is located inside the annular shallow groove (14); A plurality of flow grooves (17), all of which are formed on the annular shallow groove (14); In the initial state, the annular plate (16) blocks all of the flow grooves (17); An air blower (18) fixedly mounted on the top of the rectangular block (10); The annular air blowing knife (19) is fixedly connected to the air blowing pump (18) via a hard pipe, and the annular air blowing knife (19) is fixedly connected to the rectangular block (10). The blowing direction of the annular air blowing knife (19) is inclined toward the end of the passivation tube.

2. The galvanized pipe surface passivation treatment equipment according to claim 1, characterized in that: Also includes: A plurality of support rods (20) are fixedly mounted on the inner wall of the passivation tank (1) in a linear array; A plurality of shielding plates (21) are respectively fixedly connected to the support rods (20) at corresponding positions, and the shielding plates (21) are located between two adjacent galvanized pipes.

3. The galvanized pipe surface passivation treatment equipment according to claim 1, characterized in that: The spray assembly comprises a drive assembly and a liquid storage barrel (23), the drive assembly being used to drive the liquid storage barrel (23) to move back and forth, and the liquid storage barrel (23) is fixedly connected to a liquid spray head (24) via a liquid spray pipe.

4. A control method for a galvanized pipe surface passivation treatment device, applicable to a galvanized pipe surface passivation treatment device as claimed in any one of claims 1 to 3, characterized in that: The control method comprises the following steps: Obtaining the passivation layer thickness parameter of the target workpiece after passivation is completed; A threshold is preset, and the obtained passivation layer thickness parameter is compared with the threshold to obtain standard-compliant information and non-standard-compliant information; No feedback after receiving information that meets the standards; After obtaining the information that the standard is not met, the specific passivation time for the current target workpiece to be secondary passivated is determined; Control the passivation equipment to passivate the parts of the target workpiece that do not meet the relevant standards for a specified time.

5. The control method of a galvanized pipe surface passivation treatment equipment according to claim 4, characterized in that: The steps to determine the specific passivation time of the part that needs to be passivated for the current target workpiece are: Acquire first parameter information, the first parameter information at least including current ambient temperature information T a , current ambient humidity information T B , current passivation solution concentration information T C And the passivation layer thickness T1 of the current target workpiece after the first passivation; According to the formula T=T0×(1+T a ×(T e −T s ))×(1+T B ×(R e −R s ))×(1+T C ×(C s −C0))×(1+K a ×(T1−T2)), the actual passivation time required for the target workpiece is calculated; Where: T is the actual passivation time required; T0 is the reference passivation time, i.e. the passivation time under standard environmental conditions; T a Ambient temperature adjustment factor; T B Relative humidity adjustment factor; T C is the passivation solution concentration adjustment factor; T e is the actual ambient temperature; R e is the relative humidity of the environment; C s is the actual concentration of the passivation solution; C0 is the standard concentration of the passivation solution; T s With R s is the standard ambient temperature and relative humidity, used to calculate the adjustment factor; K a It is the passivation film thickness adjustment factor, which is a coefficient determined based on experimental data or experience, and reflects the degree of influence on the passivation time when the passivation film thickness changes by one unit; T1 is the thickness of the passivation film formed after the first passivation, and T2 is the expected standard thickness of the passivation film under standard conditions.

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