Method and equipment for producing zinc-aluminum alloy steel wire through constant-high-pressure nitrogen ring blowing

Abstract

The invention relates to a method and equipment for producing a zinc-aluminum alloy steel wire through constant-high-pressure nitrogen circular blowing, and belongs to the technical field of hot-dip galvanized aluminum alloy steel wire production methods and equipment. According to the technical scheme, an electric proportional valve is selected, so that after liquefied nitrogen passes through a gasifier, the nitrogen pressure is controlled through the electric proportional valve; the steel wire penetrates into a nitrogen circular blowing device, constant-pressure nitrogen is introduced into the nitrogen circular blowing device, and the liquid zinc-aluminum alloy on the surface of the steel wire is wiped; according to the detection result of the zinc feeding amount, the signal generator is finely adjusted to control the electric proportional valve, the nitrogen pressure is stably controlled, and therefore the zinc feeding amount is stably controlled. The method has the beneficial effects that the constant-pressure nitrogen is used for purging and wiping, so that the zinc-aluminum alloy coating is more tightly combined with the steel wire under the pressure action of the nitrogen, the running speed of the steel wire is greatly increased, and the zinc feeding amount is more stable; and the surface quality of the steel wire plated with the alloy is smoother, and the plastic coating process requirements of downstream customers are effectively met.

Description

Technical Field

[0001] This invention relates to a method and equipment for producing zinc-aluminum alloy steel wire by constant high-pressure nitrogen ring blowing, belonging to the technical field of hot-dip galvanized aluminum alloy steel wire production methods and equipment. Background Technology

[0002] In the production process of hot-dip galvanized aluminum alloy steel wire, the alloy in the zinc-aluminum alloy pot is in a high-temperature molten state. The traditional production process relies entirely on the automatic flow of the alloy by gravity. The amount of zinc on the zinc-aluminum alloy steel wire depends on the running speed of the wire. The surface quality is not effectively wiped, resulting in unstable surface quality and the appearance of "zinc nodules". Most importantly, because the amount of zinc on the wire is controlled by the running speed of the wire, the running speed of the wire is relatively slow. The DV value is generally set at 70-80 mm*m / min, which seriously affects the production efficiency of zinc-aluminum alloy steel wire. Summary of the Invention

[0003] The purpose of this invention is to provide a method and equipment for producing zinc-aluminum alloy steel wire using constant-pressure nitrogen ring blowing. By using constant-pressure nitrogen for purging and wiping, the zinc-aluminum alloy coating bonds more tightly to the steel wire under the pressure of nitrogen, significantly increasing the wire's running speed and making the zinc coating more stable. After the steel wire is purged and wiped with nitrogen, impurities carried up from the zinc pot are wiped back into the zinc pot and do not adhere to the surface of the steel wire, preventing the formation of "zinc nodules." The surface quality of the alloy-plated steel wire is smoother, effectively meeting the coating process requirements of downstream customers. The nitrogen pressure is precisely adjustable with a wide range, adapting to the production of steel wires with different zinc coating amounts. This allows the same production line to produce zinc-aluminum alloy steel wires with various zinc coating amounts, further improving production line efficiency and effectively solving the aforementioned problems in the background technology.

[0004] The technical solution of this invention is: a method for producing zinc-aluminum alloy steel wire by constant high-pressure nitrogen ring blowing, comprising the following steps: (1) Select an electric proportional valve so that the liquefied nitrogen gas passes through the vaporizer and then the nitrogen pressure is controlled by the electric proportional valve. (2) The steel wire is inserted into the nitrogen ring blowing device, and constant pressure nitrogen is introduced into the nitrogen ring blowing device to wipe the liquid zinc-aluminum alloy on the surface of the steel wire. (3) Based on the detection results of zinc content, fine-tune the signal generator to control the electric proportional valve to achieve stable control of nitrogen pressure, thereby stabilizing the zinc content.

[0005] In step (2), the airflow in the nitrogen ring blowing device duct forms an angle of 30° to 45° with the steel wire.

[0006] In step (3), the signal generator controls the output air pressure of the electric proportional valve by adjusting the output of a 4-20MA signal, and the electric proportional valve sets the range to 0-0.2MPa by adjustment.

[0007] An equipment for producing zinc-aluminum alloy steel wire by constant high pressure nitrogen ring blowing includes an electrical system and a nitrogen ring blowing device. The electrical system controls the output of the nitrogen ring blowing device. The electrical system includes a signal generator, an electro-proportional valve, a nitrogen input terminal of the electro-proportional valve, and an output terminal of the electro-proportional valve. The signal generator is connected to the electro-proportional valve through a second circuit. The nitrogen input terminal and the output terminal of the electro-proportional valve are respectively connected to the electro-proportional valve. The nitrogen ring blowing device includes a main rod, a nitrogen channel, a nitrogen input pipe, and a device body. The nitrogen input pipe and the device body are fixed at the upper and lower ends of the main rod, respectively. The nitrogen channel is set along the main rod. The output end of the electro-proportional valve is connected to the nitrogen input pipe through the nitrogen input pipe. The device body includes a guide wire hole and an annular channel. The nitrogen input pipe is provided with a vent hole, which connects to the nitrogen channel. The nitrogen channel is connected to the annular channel. The steel wire is inserted into the middle of the annular channel through the guide wire hole.

[0008] The nitrogen ring blowing device also includes a fixed beam, a fixing bolt, and an adjusting eccentric shaft. The fixed beam is located on one side of the upper end of the main rod of the device. The nitrogen input pipe is installed on the upper end of the main rod of the device by fixing screws. The nitrogen input pipe is inserted into the nitrogen inlet hole set on the fixed beam, and the nitrogen input pipe and the nitrogen inlet hole on the fixed beam are in clearance fit. The adjusting eccentric shaft and the fixing bolt are installed on the upper end of the main rod of the device. The adjusting eccentric shaft and the fixing bolt are in clearance fit with the corresponding holes of the fixed beam. The steel wire is adjusted left and right and front and back center by adjusting the eccentric shaft and the fixing bolt.

[0009] The main body of the device also includes a fixed part and a movable part. The fixed part is connected to the lower end of the main rod of the device by fixing bolts two and three. The fixed part is provided with a nitrogen inlet hole, and the nitrogen channel is connected to an annular channel through the nitrogen inlet hole. The annular channel is provided with an annular blowing gap. In the movable part, the positioning screw block is installed in the positioning groove and is fastened by the set bolt. The movable part and the fixed part are positioned and connected by the positioning pin.

[0010] The electrical system also includes a 220V AC power supply, an isolation transformer, and a switching power supply. The 220V AC power supply, the isolation transformer, and the switching power supply are connected in sequence, and provide power to the signal generator and the electric proportional valve through circuit one and circuit three, respectively.

[0011] The beneficial effects of this invention are as follows: By using constant-pressure nitrogen for purging and wiping, the zinc-aluminum alloy coating bonds more tightly with the steel wire under the pressure of nitrogen, significantly increasing the running speed of the steel wire and making the zinc coating amount more stable; after the steel wire is purged and wiped with nitrogen, impurities carried up when the steel wire leaves the zinc pot are wiped back into the zinc pot and will not adhere to the surface of the steel wire, thus preventing the formation of "zinc nodules". The surface quality of the alloy-plated steel wire is smoother, effectively meeting the process requirements of downstream customers for plastic coating; the nitrogen pressure is precisely adjustable and has a wide adjustment range, which can adapt to the production of steel wires with different zinc coating amounts, enabling the same production line to produce zinc-aluminum alloy steel wires with various zinc coating amounts, thereby further improving the efficiency of the production line. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the nitrogen ring blowing device of the present invention; Figure 2 This is a side view of the fixed part of the nitrogen ring blowing device of the present invention; Figure 3 This is a top view of the fixed part of the nitrogen ring blowing device of the present invention; Figure 4 This is a front view of the fixed part of the nitrogen ring blowing device of the present invention; Figure 5 This is a front cross-sectional view of the moving part of the nitrogen ring blowing device of the present invention; Figure 6 This is a top view of the moving part of the nitrogen ring blowing device of the present invention; Figure 7 This is a side view of the main rod of the nitrogen ring blowing device of the present invention; Figure 8 This is a front view of the main rod of the nitrogen ring blowing device of the present invention; Figure 9 This is the electrical schematic diagram of the electrical system of the present invention; In the diagram: 10 steel wire, 20 zinc pot, 11 AC power supply, 12 isolation transformer, 13 switching power supply, 14 circuit one, 15 signal generator, 16 circuit two, 17 circuit three, 18 electro-proportional valve, 19 nitrogen input terminal of electro-proportional valve, 110 output terminal of electro-proportional valve, 21 main rod of device, 22 nitrogen channel, 23 nitrogen input pipe, 24 nitrogen input tube, 25 fixing bolt one, 26 adjusting eccentric shaft, 27 fixing screw, 28 vent hole, 29 fixing bolt two, 211 nitrogen inlet hole, 212 guide wire hole, 213 annular channel, 214 positioning screw block, 215 set bolt, 216 fixing bolt three, 217 positioning pin, 218 annular blow gap, 219 positioning groove, 210 fixing beam A. Detailed Implementation

[0013] To make the purpose, technical solutions, and advantages of the invention's embodiments clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only a small part of the embodiments of the present invention, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the protection scope of the present invention.

[0014] A method for producing zinc-aluminum alloy steel wire by constant high-pressure nitrogen ring blowing includes the following steps: (1) Select an electric proportional valve so that the liquefied nitrogen gas passes through the vaporizer and then the nitrogen pressure is controlled by the electric proportional valve. (2) The steel wire is inserted into the nitrogen ring blowing device, and constant pressure nitrogen is introduced into the nitrogen ring blowing device to wipe the liquid zinc-aluminum alloy on the surface of the steel wire. (3) Based on the detection results of zinc content, fine-tune the signal generator to control the electric proportional valve to achieve stable control of nitrogen pressure, thereby stabilizing the zinc content.

[0015] In step (2), the airflow in the nitrogen ring blowing device duct forms an angle of 30° to 45° with the steel wire.

[0016] In step (3), the signal generator controls the output air pressure of the electric proportional valve by adjusting the output of a 4-20MA signal, and the electric proportional valve sets the range to 0-0.2MPa by adjustment.

[0017] An apparatus for producing zinc-aluminum alloy steel wire by constant high pressure nitrogen ring blowing includes an electrical system and a nitrogen ring blowing device. The electrical system controls the output of the nitrogen ring blowing device. The electrical system includes a signal generator 15, an electro-proportional valve 18, a nitrogen input terminal 19 of the electro-proportional valve, and an output terminal 110 of the electro-proportional valve. The signal generator 15 is connected to the electro-proportional valve 18 through a circuit 16. The nitrogen input terminal 19 and the output terminal 110 of the electro-proportional valve are respectively connected to the electro-proportional valve 18. The nitrogen ring blowing device includes a main rod 21, a nitrogen channel 22, a nitrogen input pipe 24, and a device body. The nitrogen input pipe 24 and the device body are fixed at the upper and lower ends of the main rod 21, respectively. The nitrogen channel 22 is arranged along the main rod 21. The output end 110 of the electro-proportional valve is connected to the nitrogen input pipe 24 through the nitrogen input pipe 23. The device body includes a guide wire hole 212 and an annular channel 213. The nitrogen input pipe 24 is provided with a vent hole 28. The nitrogen input pipe 24 is connected to the nitrogen channel 2 through the vent hole 28. The nitrogen channel 22 is connected to the annular channel 213. The steel wire 10 is inserted into the middle of the annular channel 213 through the guide wire hole 212.

[0018] The nitrogen ring blowing device also includes a fixed beam A, a fixing bolt 25, and an adjusting eccentric shaft 26. The fixed beam A is located on one side of the upper end of the main rod 21 of the device. The nitrogen input pipe 24 is installed on the upper end of the main rod 21 of the device by fixing screws 27. The nitrogen input pipe 24 is inserted into the nitrogen inlet hole set on the fixed beam A, and the nitrogen input pipe 24 and the nitrogen inlet hole on the fixed beam A are in clearance fit. The adjusting eccentric shaft 26 and the fixing bolt 25 are installed on the upper end of the main rod 21 of the device. The adjusting eccentric shaft 26 and the fixing bolt 25 are set in clearance fit with the corresponding holes of the fixed beam A. The steel wire 10 is adjusted left and right and front and back center by adjusting the eccentric shaft 26 and the fixing bolt 25 respectively.

[0019] The main body of the device also includes a fixed part and a movable part. The fixed part is connected to the lower end of the main rod 21 of the device by fixing bolts 29 and 216. The fixed part is provided with a nitrogen inlet hole 211. The nitrogen channel 22 is connected to the annular channel 213 through the nitrogen inlet hole 211. The annular channel 213 is provided with annular blowing gap 218. In the movable part, the positioning screw block 214 is installed in the positioning groove 219 and fastened by the set bolt 215. The movable part and the fixed part are positioned and connected by the positioning pin 217.

[0020] The electrical system also includes a 220V AC power supply 11, an isolation transformer 12, and a switching power supply 13. The 220V AC power supply 11, the isolation transformer 12, and the switching power supply 13 are connected in sequence and provide power to the signal generator 15 and the electro-proportional valve 18 through circuit one 14 and circuit three 17, respectively.

[0021] In practical applications, this invention is divided into two main parts: One part is the electronic control system, whose function is to supply constant high-pressure nitrogen that can be precisely controlled. Here, "constant high-pressure nitrogen" means that the nitrogen pressure supplied to the ring blowing device is constant. However, depending on the specifications, the nitrogen pressure supplied to the ring blowing device will vary because the amount of zinc on the zinc-aluminum alloy steel wire needs to be controlled. This is mainly due to the different requirements of product specifications and zinc content, which in turn require different nitrogen pressures.

[0022] The second part is the nitrogen ring-blowing device, which is the actuator for performing nitrogen ring-blowing. This device can effectively wipe away the molten zinc-aluminum alloy hanging on the steel wire, making the zinc-aluminum alloy coating bond more tightly to the steel wire body. Furthermore, impurities such as zinc oxide and precipitated aluminum brought up from the surface of the zinc pot with the steel wire are blown back into the zinc pot by nitrogen gas and finally retrieved by personnel, effectively preventing the formation of "zinc nodules" and further stabilizing the surface quality of the hot-dip galvanized aluminum alloy steel wire. Under this process condition, the DV value of the steel wire can be set to 120-130 mm*m / min, effectively improving the production efficiency of zinc-aluminum alloy steel wire.

[0023] In the electrical control system, a 220V AC power supply 11 outputs 220V AC power through an isolation transformer 12, and a switching power supply 13 outputs 24V DC power. Circuit 1 (14) and Circuit 3 (17) provide power to the signal generator 15 and the electro-proportional valve 18. The signal generator 15, through adjustment, emits a 4-20mA signal, which controls the output air pressure of the electro-proportional valve 18 via Circuit 2 (16). The electro-proportional valve 18, through adjustment, sets its range to 0-0.2MPa.

[0024] Nitrogen gas from the electric proportional valve 18 is fed into the nitrogen input pipe 3 installed on the fixed beam A, and then enters the nitrogen ring blowing device through the nitrogen input pipe 24. The nitrogen gas enters the nitrogen channel 22 through the vent hole 28 on the nitrogen input pipe 24, flows into the nitrogen inlet hole 211 of the nitrogen ring blowing device, then passes through the annular channel 213, and finally is blown out through the ring blowing gap 218 to clean and wipe the steel wire.

[0025] The nitrogen ring blowing device consists of a fixed part and a movable part. The fixed part is connected to the lower end of the main rod 21 by fixing bolts 29 and 216, and nitrogen is also connected to it. The movable part is installed after the steel wire 10 is installed. First, the positioning screw block 214 is installed into the positioning groove 219, and then the set bolt 215 is tightened to make the movable part and the fixed part precisely positioned and engaged by the positioning pin 217. At this time, nitrogen is introduced through the annular channel 213.

[0026] To avoid contamination of the nitrogen ring-blowing device by liquid zinc-aluminum alloy during wire threading, the nitrogen ring-blowing device should be installed after the steel wire has passed through. First, insert the nitrogen input pipe 24 into the nitrogen inlet hole on fixed beam A, with a clearance fit between the nitrogen input pipe 24 and the nitrogen inlet hole on fixed beam A. Then, insert the eccentric shaft 26 into the corresponding hole on fixed beam A, with a clearance fit between the eccentric shaft 26 and the corresponding hole on fixed beam A. Then, tighten the fixing bolt 25. After initial adjustment, install the movable part of the nitrogen ring-blowing device. When the steel wire 10 is not in the center of the annular channel 213, adjust the eccentric shaft 26 to achieve left-right adjustment and adjust the fixing bolt 25 to achieve front-back adjustment.

[0027] During normal production, after the steel wire 10 exits the zinc pot 20, it passes through the guide wire hole 212. At this time, the zinc-aluminum alloy on the steel wire 10 is still in a molten state. Constant high-pressure nitrogen gas is blown out through the ring blow gap 218 to evenly wipe the molten zinc-aluminum alloy. Due to the wiping of the high-pressure nitrogen gas, the zinc-aluminum alloy layer on the steel wire 10 is more tightly bonded to the steel wire 10 body. Due to the back-blowing wiping of nitrogen gas, the excess zinc-aluminum alloy flows back into the zinc pot.

[0028] When the zinc content is too high, the signal generator 15 in the constant high pressure nitrogen electrical control system is adjusted to increase the current signal, thereby increasing the nitrogen pressure and reducing the zinc content. When the zinc content is too low, the adjustment is reversed.

[0029] This invention differs from the traditional zinc-aluminum alloy production process. The traditional zinc-aluminum alloy steel wire production process relies on the alloy flowing down automatically by gravity, and the amount of zinc applied is controlled by the running speed of the steel wire. In order to ensure the amount of zinc applied, the steel wire speed is generally low, and the oxide impurities on the zinc pot surface are very easy to adhere to the surface of the steel wire and form zinc nodules. In severe cases, it will prevent downstream users from using it for plastic coating processes.

[0030] This invention utilizes constant-pressure nitrogen for purging and wiping. Firstly, the running speed of the steel wire is significantly increased (by nearly 40%), and the zinc coating amount is controlled by adjusting the nitrogen pressure, resulting in a more stable zinc coating amount. After the steel wire is purged and wiped with nitrogen, impurities carried up with it when exiting the zinc pot are wiped back into the zinc pot and do not adhere to the surface of the steel wire, thus preventing the formation of "zinc nodules" and fully meeting the coating process requirements of downstream customers.

Claims

1. A method for producing zinc-aluminum alloy steel wire by constant high-pressure nitrogen ring blowing, characterized in that... Includes the following steps: (1) Select an electric proportional valve so that the liquefied nitrogen gas passes through the vaporizer and then the nitrogen pressure is controlled by the electric proportional valve. (2) The steel wire is inserted into the nitrogen ring blowing device, and constant pressure nitrogen is introduced into the nitrogen ring blowing device to wipe the liquid zinc-aluminum alloy on the surface of the steel wire. (3) Based on the detection results of zinc content, fine-tune the signal generator to control the electric proportional valve to achieve stable control of nitrogen pressure, thereby stabilizing the zinc content.

2. The method for producing zinc-aluminum alloy steel wire by constant high-pressure nitrogen ring blowing according to claim 1, characterized in that: In step (2), the airflow in the nitrogen ring blowing device duct forms an angle of 30° to 45° with the steel wire.

3. The method for producing zinc-aluminum alloy steel wire by constant high-pressure nitrogen ring blowing according to claim 1, characterized in that: In step (3), the signal generator controls the output air pressure of the electric proportional valve by adjusting the output of a 4-20MA signal, and the electric proportional valve sets the range to 0-0.2MPa by adjustment.

4. A device for producing zinc-aluminum alloy steel wire by constant high-pressure nitrogen ring blowing, characterized in that: It includes an electrical system and a nitrogen ring blowing device. The electrical system controls the output of the nitrogen ring blowing device. The electrical system includes a signal generator (15), an electric proportional valve (18), a nitrogen input terminal (19) of the electric proportional valve and an output terminal (110) of the electric proportional valve. The signal generator (15) is connected to the electric proportional valve (18) through circuit two (16). The nitrogen input terminal (19) and the output terminal (110) of the electric proportional valve are respectively connected to the electric proportional valve (18). The nitrogen ring blowing device includes a main rod (21), a nitrogen channel (22), a nitrogen input pipe (24), and a device body. The nitrogen input pipe (24) and the device body are fixed at the upper and lower ends of the main rod (21), respectively. The nitrogen channel (22) is set along the main rod (21). The output end (110) of the electro-proportional valve is connected to the nitrogen input pipe (24) through the nitrogen input pipe (23). The device body includes a guide wire hole (212) and an annular channel (213). The nitrogen input pipe (24) is provided with a vent hole (28). The nitrogen input pipe (24) is connected to the nitrogen channel (22) through the vent hole (28). The nitrogen channel (22) is connected to the annular channel (213). The steel wire (10) is inserted into the middle of the annular channel (213) through the guide wire hole (212).

5. The equipment for producing zinc-aluminum alloy steel wire by constant high-pressure nitrogen ring blowing according to claim 4, characterized in that: The nitrogen ring blowing device also includes a fixed beam (A), a fixing bolt (25), and an adjusting eccentric shaft (26). The fixed beam (A) is set on one side of the upper end of the main rod (21) of the device. The nitrogen input pipe (24) is installed on the upper end of the main rod (21) of the device by fixing screws (27). The nitrogen input pipe (24) is inserted into the nitrogen inlet hole set on the fixed beam (A). The nitrogen input pipe (24) and the nitrogen inlet hole on the fixed beam (A) are in clearance fit. The adjusting eccentric shaft (26) and the fixing bolt (25) are installed on the upper end of the main rod (21) of the device. The adjusting eccentric shaft (26) and the fixing bolt (25) are in clearance fit with the corresponding hole of the fixed beam (A). The steel wire (10) is adjusted left and right and front and back by adjusting the eccentric shaft (26) and the fixing bolt (25).

6. The equipment for producing zinc-aluminum alloy steel wire by constant high-pressure nitrogen ring blowing according to claim 4, characterized in that: The main body of the device also includes a fixed part and a movable part. The fixed part is connected to the lower end of the main rod (21) of the device by fixing bolt two (29) and fixing bolt three (216). The fixed part is provided with a nitrogen inlet hole (211). The nitrogen channel (22) is connected to the annular channel (213) through the nitrogen inlet hole (211). The annular channel (213) is provided with annular blowing gap (218). In the movable part, the positioning screw block (214) is installed in the positioning groove (219) and fastened by the set bolt (215). The movable part and the fixed part are positioned and connected by the positioning pin (217).

7. The equipment for producing zinc-aluminum alloy steel wire by constant high-pressure nitrogen ring blowing according to claim 4, characterized in that: The electrical system also includes a 220V AC power supply (11), an isolation transformer (12), and a switching power supply (13). The 220V AC power supply (11), the isolation transformer (12), and the switching power supply (13) are connected in sequence and provide power to the signal generator (15) and the electric proportional valve (18) through circuit one (14) and circuit three (17), respectively.

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