A steel strand production equipment

Abstract

This application discloses a steel strand production equipment, including a phosphating tank with a heating chamber at the bottom; it also includes a connecting frame mounted on top of the phosphating tank, with vertical chutes on opposite sides of the phosphating tank. The connecting frame is fixedly equipped with a connecting rod and a sliding block slidably connected to the chutes. The bottom of the connecting rod extends into the phosphating tank and is fixedly connected to a float. The connecting frame has multiple sets of drive rollers arranged sequentially from left to right. Each set of drive rollers includes two first guide rollers and two second guide rollers, both of which are rotatably connected to the connecting frame. The connecting frame is fixedly connected with a heating cylinder and a blower that match each set of drive rollers. In this design, the phosphating solution level remains constant directly below the heating cylinder and blower, preventing the wire rod from detaching from them, thus extending the phosphating time and improving the phosphating effect.

Description

Technical Field

[0001] This invention relates to the field of steel strand production technology, and more specifically to a steel strand production equipment. Background Technology

[0002] With the accelerated development of the national economy and transportation engineering, the scale of bridge construction is constantly expanding, which in turn places increasingly higher technical requirements on steel strands used in bridges. Furthermore, with the advancement of bridge technology, the demand for fatigue performance of steel strands is continuously increasing, with fatigue stress amplitude rising from 100MPa to 200MPa, and in some projects even exceeding 400MPa.

[0003] The production process of a certain type of steel strand with a fatigue stress amplitude of 360 MPa is as follows: the wire rod is pickled and phosphated, the phosphated wire rod is dry drawn to obtain intermediate steel wire, the obtained intermediate steel wire is twisted into prestressed steel strand, and the twisted steel strand is stabilized to obtain the finished product.

[0004] Phosphating refers to the process of producing a phosphate film on the surface of wire rod to increase its lubrication properties during production and protect the surface quality of the steel wire. Strict temperature control is required in the phosphating bath during the phosphating process; it must be maintained between 70℃ and 80℃ to ensure optimal wire rod surface quality. Although existing technologies use heating to maintain the water temperature in the phosphating bath within a suitable range, the relatively low temperature of the wire rod when it enters the bath causes the phosphating solution to cool upon contact with the wire rod, thus compromising the phosphating effect.

[0005] To address this, the applicant provides a method in which heating cylinders and air blowers are installed at both ends of the wire rod. The heating cylinders raise the temperature of the wire rod before it enters the phosphating solution, thus preventing a large temperature difference after the wire rod enters the phosphating pool and avoiding cooling of the phosphating solution, which would cause the temperature of the phosphating solution to drop. Furthermore, the high surface temperature of the wire rod facilitates the penetration of the phosphating solution into the wire rod for phosphating. Simultaneously, after the wire rod leaves the phosphating solution, the air blowers blow hot air towards the wire rod, continuing to heat it. This prevents the phosphating solution on the surface of the wire rod from cooling rapidly in the air, thereby extending the phosphating time of the wire rod and improving the phosphating effect.

[0006] However, in existing technologies, as the phosphating solution in the phosphating tank gradually decreases, the wire rods are gradually exposed to the environment. These exposed wire rods cannot be heated by the heating cylinder or air blower and will cool rapidly in the air, resulting in a poorer phosphating effect for the exposed parts of the wire rods. Furthermore, the phosphating solution is corrosive, and the traditionally used precision liquid level automatic replenishment device installed in the phosphating tank is easily corroded and deteriorated. Therefore, the replenishment of the phosphating tank currently still relies on manual replenishment. Summary of the Invention

[0007] The present invention aims to provide a steel strand production equipment to solve the problem in the prior art that when the phosphating solution in the phosphating tank gradually decreases, the exposed wire rod cannot be heated by the heating cylinder or the blower, resulting in a poor phosphating effect of the wire rod.

[0008] To address the above problems, this application provides the following technical solution:

[0009] A steel strand production device includes a phosphating tank with a heating chamber at its bottom, the heating chamber equipped with heating elements; it also includes a connecting frame mounted on top of the phosphating tank, with vertical chutes on opposite sides of the phosphating tank; the connecting frame is fixedly equipped with a connecting rod and a sliding block slidably connected to the chutes, the bottom of the connecting rod extending into the phosphating tank and fixedly connected to a float; the connecting frame is provided with multiple sets of transmission rollers from left to right, and the wire rod is transmitted through the multiple sets of transmission rollers from left to right; each set of transmission rollers includes two first guide rollers and two second guide rollers located on the same vertical plane, the first guide rollers and the second guide rollers... The rollers are rotatably connected to the connecting frame, which is fixedly connected to a heating cylinder and a blower for each set of transmission rollers. The heating cylinder is sleeved on the wire rod between the two first guide rollers of each set of transmission rollers, and the blower is sleeved on the wire rod between the two second guide rollers of each set of transmission rollers. The heating cylinder has a heating chamber inside, and the heating chamber has a heating wire. The blower has a ventilation chamber inside, and the ventilation chamber is connected to a hot air pipe. The blower has multiple sets of air outlets, each set of air outlets including multiple air outlets arranged along the circumference of the blower. The air outlets are connected to the ventilation chamber, and all the multiple air outlets blow air towards the wire rod.

[0010] Working principle and beneficial effects of the present invention:

[0011] The phosphating solution is added to the phosphating tank to maintain a certain liquid level, which is directly below the heating cylinder and the blower. Because the sliding block and the sliding groove of the connecting frame are slidably connected, the sliding grooves on both sides restrict the connecting frame to move only vertically. The floats are located inside the phosphating tank, and the floats on both sides generate upward buoyancy within the phosphating solution, supporting the entire connecting frame.

[0012] The wire rod is transported sequentially from left to right through multiple sets of drive rollers. Each set of drive rollers includes two first guide rollers and two second guide rollers located on the same vertical plane. A connecting frame is fixedly connected to a heating cylinder and a blower for each set of drive rollers. The heating cylinder is fitted onto the wire rod between the two first guide rollers of each set of drive rollers, and the blower is fitted onto the wire rod between the two second guide rollers of each set of drive rollers. The heating cylinder is heated by a heating wire, so the wire rod is heated as it passes through the heating cylinder. The heated wire rod then enters the phosphating bath. After the wire rod leaves the phosphating solution, hot air is blown into the blower through a hot air pipe. The hot air is then blown in through a ventilation cavity and then... Multiple air outlets blow hot air towards the wire rod, continuing to heat the wire rod and blowing excess phosphating solution onto it into the phosphating tank. The heating cylinder further heats the wire rod, raising its surface temperature to a suitable phosphating temperature. This prevents the phosphating solution from cooling down after the wire rod enters the tank, thus ensuring rapid phosphating and improving efficiency. Simultaneously, the continued heating after the wire rod leaves the phosphating solution prevents rapid cooling of the solution on its surface, maintaining the temperature of both the solution and the wire rod. This extends the phosphating time and improves the overall phosphating effect.

[0013] In addition, the number of drive roller groups in this application is multiple, so that the wire rod goes through multiple heating processes after entering the phosphating solution, and then leaves the phosphating solution and is heated by hot air again, which further improves the phosphating coating effect.

[0014] Furthermore, as the phosphating solution gradually decreases, its level in the phosphating tank gradually drops. Consequently, the floats on both sides also descend synchronously with the phosphating solution level. This also causes the connecting frame, along with the multiple drive roller sets, wire rod, and multiple heating cylinders and air blowers mounted on the connecting frame, to descend synchronously. Therefore, the position between each heating cylinder, air blower, and corresponding wire rod remains unchanged, meaning the phosphating solution level remains constant directly below the heating cylinder and air blower. This prevents the wire rod from detaching from the heating cylinder and air blower, ensuring that the wire rod is immediately immersed in the phosphating solution after being heated by the heating cylinder, and immediately enters the air blower for heating after detaching from the phosphating solution. This avoids the wire rod being exposed to the environment, which would cause the wire rod and the phosphating solution adhering to its surface to cool rapidly in the air, thus extending the phosphating time of the wire rod and improving the phosphating effect.

[0015] Furthermore, the chute is located at the top of the phosphating tank, and a first contact sensor is fixedly installed at the bottom of the sliding block. A second contact sensor, which works in conjunction with the first contact sensor, is also fixedly installed at the bottom of the chute. An alarm, forming a closed electrical circuit with the first and second contact sensors, is also included. As the sliding block slides within the chute, the first and second contact sensors at the bottom collide, and the alarm, the first contact sensor, and the second contact sensor form a closed electrical circuit. The alarm then alerts personnel to add phosphating solution towards the phosphating tank.

[0016] Furthermore, the heating wire is arranged in a ring within the heating chamber, and multiple sets of air outlets in each blower are spaced apart in the vertical direction. This arrangement ensures more uniform heating of the coil by the heating wire and blower.

[0017] Furthermore, the phosphating tank is rotatably connected to a stirring shaft located below the chute, and the stirring shaft is fixedly equipped with multiple stirring blades. The stirring shaft drives the stirring blades to rotate, stirring the phosphating solution and increasing the heating rate of the phosphating solution.

[0018] Furthermore, the diameter of the air outlet is 1-2 cm. This design allows for better air blowing and heating of the wire rod.

[0019] Furthermore, a sealing plate is fixedly sleeved in the middle of the ventilation cavity, and the sealing plate divides the ventilation cavity into a first connecting cavity and a second connecting cavity from top to bottom. The hot air pipe connects the first connecting pipe and the second connecting pipe. The first connecting pipe is connected to the first connecting cavity, and the second connecting pipe is connected to the second connecting cavity. A heating strip is also fixedly installed in the second connecting cavity. The diameter of the multiple sets of air outlets on the second connecting cavity gradually increases from bottom to top, while the diameter of the multiple sets of air outlets on the first connecting cavity is the same.

[0020] When the wire rod leaves the phosphating bath and enters the blower, its surface is coated with a large amount of high-temperature phosphating solution. At this point, the wire rod dissipates heat slowly, and the large amount of high-temperature phosphating solution continues to insulate and coat the wire rod. To prevent the large airflow from the exhaust vents from blowing away this attached phosphating solution, thus preventing the wire rod from losing its phosphating coating and dissipating heat into the environment, and also to slow down the rate at which the phosphating solution cools, the ventilation chamber is divided from top to bottom into a first connecting chamber and a second connecting chamber using a sealing plate. Hot air passes through the first connecting chamber... The pipe enters the first connecting chamber, and hot air enters the second connecting chamber through the second connecting pipe. Since the diameter of the multiple sets of air outlets on the second connecting chamber gradually increases from bottom to top, the air volume gradually increases from bottom to top. In addition, the second connecting chamber is also equipped with heating strips, which further heat the hot air entering the second connecting chamber, thereby increasing the temperature of the hot air. This ensures that even with a small air volume, the hot air temperature is appropriately increased, thus ensuring the heat preservation effect on the wire rod and phosphating solution and improving the reaction rate.

[0021] When the wire rod first enters the second connecting chamber, the phosphating solution coating its surface will not be dispersed due to the large air volume. Instead, the wire rod is heated by the gradually increasing hot air in the second connecting chamber, allowing the phosphating solution to continue to coat the wire rod. Subsequently, it enters the first connecting chamber. The multiple sets of air outlets in the first connecting chamber have the same aperture size, so the air volume is fixed, which can quickly heat and keep the wire rod warm, further improving the phosphating effect.

[0022] Furthermore, the number of drive roller sets is 3 to 5. With 3 to 5 drive roller sets, the wire rod can undergo 3 to 5 phosphate coating processes.

[0023] Furthermore, the heating element is a heating rod.

[0024] Furthermore, the first guide roller, the float, and the second guide roller are all equipped with a corrosion-resistant layer. This design reduces corrosion and oxidation, thereby increasing their service life. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of a steel strand production equipment according to the present invention;

[0026] Figure 2 for Figure 1 Schematic diagram of the structure after the connecting frame has been lowered;

[0027] Figure 3 for Figure 1 Vertical cross-sectional view of the middle heating cylinder;

[0028] Figure 4 for Figure 1 Vertical cross-sectional view of the blower duct;

[0029] Figure 5 This is a vertical cross-sectional view of the blower in Example 2. Detailed Implementation

[0030] The following detailed description illustrates the specific implementation method:

[0031] The reference numerals in the accompanying drawings include: heating cylinder 1, slide groove 2, sliding block 3, connecting frame 4, first guide roller 5, blower 6, wire rod 7, second guide roller 8, hot air pipe 9, phosphating tank 10, float ball 11, phosphating solution 12, heating chamber 13, heating rod 14, heating wire 15, air outlet 16, ventilation cavity 17, first connecting pipe 18, first connecting cavity 19, sealing plate 20, second connecting pipe 21, second connecting cavity 22, and heating strip 24.

[0032] In the following statements, directional terms such as "left," "right," "up," and "down" are based on the directions shown in the diagram. In practice, if the corresponding structures are changed in the same direction based on the direction while maintaining their relative positions, it will not affect the implementation of the plan.

[0033] Example 1: A steel strand production equipment, such as Figure 1 As shown, it includes a phosphating tank 10, and a heating chamber 13 is provided at the bottom of the phosphating tank 10. A heating element is fixedly provided in the heating chamber 13, and the heating element is specifically a heating rod 14.

[0034] It also includes a connecting frame 4 set on the top of the phosphating tank 10. The left and right sides of the phosphating tank 10 are provided with corresponding sliding grooves 2. The sliding grooves 2 are set vertically. The connecting frame 4 is fixedly provided with a connecting rod. The connecting rod is fixedly provided with a sliding block 3 that is slidably connected to the corresponding sliding groove 2. The bottom of the connecting rod extends into the phosphating tank 10 and is fixedly connected with a float ball 11.

[0035] The connecting frame 4 is provided with two sets of transmission rollers from left to right. The wire rod 7 passes through the two sets of transmission rollers from left to right for transmission. Each set of transmission rollers includes two first guide rollers 5 and two second guide rollers 8 located on the same vertical plane. The first guide rollers 5 and the second guide rollers 8 are rotatably connected to the connecting frame 4. The connecting frame 4 is fixedly connected with a heating cylinder 1 and a blower 6 that are matched with each set of transmission rollers. The heating cylinder 1 is sleeved on the wire rod 7 between the two first guide rollers 5 of each set of transmission rollers, and the blower 6 is sleeved on the wire rod 7 between the two second guide rollers 8 of each set of transmission rollers.

[0036] like Figure 3 As shown, the heating cylinder 1 has a heating chamber inside, and a heating wire 15 is fixedly installed in the heating chamber, such as... Figure 4 As shown, the blower 6 has a ventilation chamber 17 inside, and the ventilation chamber 17 is fixed and connected to a hot air pipe 9. The hot air pipe 9 is connected to a hose, and the hose is connected to a hot air blower. Hot air is blown into the hot air pipe 9 through the hot air blower and the hose.

[0037] The inner circumference of the blower 6 is provided with 12 air outlets 16 that communicate with the ventilation cavity 17, and the 12 air outlets 16 blow air towards the wire rod 7.

[0038] Phosphating solution 12 is added to phosphating tank 10 to maintain a certain liquid level, which is directly below heating cylinder 1 and blower 6. Since sliding block 3 and chute 2 are slidably connected, the chute 2 on both sides restricts the connecting frame 4 to move only vertically. Float balls 11 are located within phosphating tank 10, and the float balls 11 on both sides generate upward buoyancy within the phosphating solution 12, supporting the entire connecting frame 4.

[0039] like Figure 2 As shown, the wire rod 7 is transmitted from left to right through two sets of transmission rollers. Each set of transmission rollers includes two first guide rollers 5 and two second guide rollers 8 located on the same vertical plane. The connecting frame 4 is fixedly connected to a heating cylinder 1 and a blower 6 that are matched with each set of transmission rollers. The heating cylinder 1 is sleeved on the wire rod 7 between the two first guide rollers 5 of each set of transmission rollers, and the blower 6 is sleeved on the wire rod 7 between the two second guide rollers 8 of each set of transmission rollers. The heating cylinder 1 is heated by the heating wire 15, so the wire rod 7 is also heated as it passes through the heating cylinder 1. The heated wire rod 7 then enters the phosphating tank 10. After the wire rod 7 leaves the phosphating solution 12, hot air is blown into the blower 6 through the hot air pipe 9. The hot air is blown in through the ventilation cavity 17 and then through 12 air outlets 16 towards the wire rod 7. Hot air continues to heat the wire rod 7, and blows excess phosphating solution 12 from the wire rod 7 into the phosphating tank 10. The heating cylinder 1 heats the wire rod 7, raising its surface temperature to a suitable phosphating temperature. This ensures that the temperatures of the wire rod 7 and the phosphating solution 12 are comparable. When the wire rod 7 enters the phosphating tank 10, it will not cool the phosphating solution 12, thus preventing the temperature of the phosphating solution 12 from dropping. Furthermore, the high surface temperature of the wire rod 7 facilitates the penetration of the phosphating solution 12 into the wire rod 7 for rapid phosphating, improving phosphating efficiency. Simultaneously, after the wire rod 7 leaves the phosphating solution 12, the hot air continues to heat the wire rod 7, preventing the phosphating solution 12 on the surface of the wire rod 7 from cooling rapidly in the air. This maintains the reaction temperature between the phosphating solution 12 and the wire rod 7, extending the phosphating time of the phosphating solution 12 on the wire rod 7 and improving the phosphating effect.

[0040] In addition, the number of drive roller groups in this application can be set to multiple, so that the wire rod 7 goes through the process of being heated multiple times before entering the phosphating solution 12, and then being heated by hot air again after leaving the phosphating solution 12, thereby further improving the phosphating coating effect.

[0041] Furthermore, as the phosphating solution 12 gradually decreases, its level in the phosphating tank 10 gradually drops. Consequently, the floats 11 on both sides also descend synchronously with the phosphating solution 12 level. This also causes the connecting frame 4, along with the two drive roller sets, wire rod 7, two heating cylinders 1, and air blower 6 mounted on the connecting frame 4, to descend synchronously. Therefore, the positions of each heating cylinder 1, air blower 6, and corresponding wire rod 7 remain unchanged, meaning the phosphating solution 12 level is always directly below the heating cylinder 1 and air blower 6. The position remains unchanged, so that the wire rod 7 will not detach from the heating cylinder 1 and the blowing cylinder 6. After the wire rod 7 is heated by the heating cylinder 1, it immediately enters the phosphating solution 12. After the wire rod 7 detaches from the phosphating solution 12, it immediately enters the blowing cylinder 6 for heating. This avoids the wire rod 7 from being exposed to the environment and rapidly cooling down due to the drop in the phosphating solution 12 level. It also prevents the wire rod 7 and the phosphating solution 12 adhering to its surface from rapidly cooling in the air, thereby prolonging the phosphating time of the phosphating solution 12 on the wire rod 7 and improving the phosphating effect.

[0042] Example 2 differs from Example 1 in that: Figure 5 As shown, a sealing plate 20 is fixedly sleeved in the middle of the ventilation cavity 17. The sealing plate 20 divides the ventilation cavity 17 into a first connecting cavity 19 and a second connecting cavity 22 from top to bottom. The hot air pipe 9 is connected to the first connecting pipe 18 and the second connecting pipe 21. The first connecting pipe 18 is connected to the first connecting cavity 19, and the second connecting pipe 21 is connected to the second connecting cavity 22. The second connecting cavity 22 is also fixedly provided with a heating strip 24. The diameter of the six sets of air outlet holes 16 on the second connecting cavity 22 gradually increases from bottom to top. The diameter of the multiple sets of air outlet holes 16 on the first connecting cavity 19 is the same.

[0043] When the wire rod 7 leaves the phosphating bath 10 and enters the blower 6, its surface is coated with a large amount of high-temperature phosphating solution 12. At this time, the wire rod 7 dissipates heat to the outside slowly, and the large amount of high-temperature phosphating solution 12 continues to keep the wire rod 7 warm and perform phosphating coating. To prevent the large airflow from the air outlet 16 from blowing away the attached phosphating solution 12 and causing the wire rod 7 to lose its coating and dissipate heat to the environment, and also to slow down the rate at which the temperature of the phosphating solution 12 decreases, the ventilation cavity 17 is divided from top to bottom into a first connecting cavity 19 and a second connecting cavity 22 by a sealing plate 20. Hot air passes through the first connecting cavity 19 and the second connecting cavity 22. A connecting pipe 18 enters the first connecting cavity 19, and hot air enters the second connecting cavity 22 through the second connecting pipe 21. Since the diameter of the six sets of air outlet holes 16 on the second connecting cavity 22 gradually increases from bottom to top, the air volume gradually increases from bottom to top. In addition, a heating strip 24 is provided in the second connecting cavity 22. The heating strip 24 continues to heat the hot air entering the second connecting cavity 22, thereby increasing the temperature of the hot air. This ensures that the hot air temperature is appropriately increased even when the air volume is low, thus ensuring the heat preservation effect on the wire rod 7 and the phosphating solution 12 and improving the reaction rate.

[0044] When the wire rod 7 first enters the second connecting cavity 22, the phosphating solution 12 on its surface will not be dispersed due to the large air volume. The wire rod 7 is heated by the gradually increasing hot air in the second connecting cavity 22, so that the phosphating solution 12 continues to phosphate the wire rod 7. Then it enters the first connecting cavity 19. The six sets of air outlet holes 16 on the first connecting cavity 19 have the same hole diameter, so the air volume is fixed. This allows the wire rod 7 to be heated and kept warm quickly, further improving the phosphating effect.

[0045] In both Example 1 and Example 2, the heating rod 14 and the heating strip 24 are energized to raise the temperature.

[0046] For those skilled in the art, numerous modifications and improvements can be made without departing from the inventive concept of this invention. These modifications and improvements should also be considered within the scope of protection of this invention, and will not affect the effectiveness of the invention or the practicality of the patent. The scope of protection claimed in this application shall be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A steel strand production equipment, comprising a phosphating tank, wherein a heating chamber is provided at the bottom of the phosphating tank, and the heating chamber is provided with a heating element; characterized in that: It also includes a connecting frame installed at the top of the phosphating tank. Vertical chutes are provided on opposite sides of the phosphating tank. The connecting frame is fixedly equipped with a connecting rod and a sliding block slidably connected to the chutes. The bottom of the connecting rod extends into the phosphating tank and is fixedly connected to a float. Multiple sets of transmission rollers are arranged sequentially from left to right on the connecting frame. The wire rod passes through these multiple sets of transmission rollers sequentially from left to right for transmission. Each set of transmission rollers includes two first guide rollers and two second guide rollers located on the same vertical plane. Both the first and second guide rollers are rotatably connected to the connecting frame. The connecting frame is fixedly connected to each... The set of drive rollers is matched with a heating cylinder and a blower. The heating cylinder is sleeved on the wire rod between the two first guide rollers of each set of drive rollers, and the blower is sleeved on the wire rod between the two second guide rollers of each set of drive rollers. The heating cylinder has a heating chamber inside, and the heating chamber has a heating wire. The blower has a ventilation chamber inside, and the ventilation chamber is connected to a hot air pipe. The blower has multiple sets of air outlets. Each set of air outlets includes multiple air outlets arranged along the circumference of the blower. The air outlets are connected to the ventilation chamber, and all of the multiple air outlets blow air towards the wire rod.

2. The steel strand production equipment according to claim 1, characterized in that: The chute is located at the top of the phosphating tank. A first contact sensor is fixedly installed at the bottom of the sliding block. A second contact sensor that works in conjunction with the first contact sensor is fixedly installed at the bottom of the chute. The system also includes an alarm that forms a closed circuit with the first and second contact sensors.

3. The steel strand production equipment according to claim 2, characterized in that: The heating wires are arranged in a ring inside the heating chamber, and multiple sets of air outlets in each blower are spaced apart in the vertical direction.

4. The steel strand production equipment according to claim 3, characterized in that: The phosphating tank is also rotatably connected to a stirring shaft located below the chute, and the stirring shaft is fixedly equipped with multiple stirring blades.

5. The steel strand production equipment according to claim 4, characterized in that: The diameter of the air outlet is 1 to 2 cm.

6. The steel strand production equipment according to any one of claims 1 to 5, characterized in that: A sealing plate is fixedly sleeved in the middle of the ventilation cavity. The sealing plate divides the ventilation cavity into a first connecting cavity and a second connecting cavity from top to bottom. The hot air pipe connects the first connecting pipe and the second connecting pipe. The first connecting pipe is connected to the first connecting cavity, and the second connecting pipe is connected to the second connecting cavity. A heating strip is also fixedly installed in the second connecting cavity. The diameter of the multiple sets of air outlets on the second connecting cavity gradually increases from bottom to top, while the diameter of the multiple sets of air outlets on the first connecting cavity is the same.

7. The steel strand production equipment according to claim 6, characterized in that: The number of drive roller sets is 3 to 5.

8. The steel strand production equipment according to claim 7, characterized in that: The heating element is a heating rod.

9. The steel strand production equipment according to claim 8, characterized in that: The first guide roller, the float, and the second guide roller are all provided with a corrosion-resistant layer.

Images