Efficient weak pickling device for high-strength corrosion-resistant steel wire

Abstract

The invention relates to the technical field of steel wire surface treatment, in particular to an efficient weak pickling device for high-strength corrosion-resistant steel wires, which comprises a pickling tank, a truss vehicle and a sliding frame, tracks are symmetrically arranged on two sides of the pickling tank, the truss vehicle is connected to the tracks in a walking manner through a driving device, and a lifting mechanism and a guide assembly are arranged on a truss of the truss vehicle; the lifting mechanism can drive the sliding frame to move up and down along the guide assembly, a plurality of hook assemblies used for hanging steel wire coils are arranged at the bottom of the sliding frame, a plurality of ultrasonic generators are arranged on the side wall of the pickling tank, and a high-pressure washing assembly used for washing the steel wire coils is arranged at the top of the pickling tank. The device is simple in structure and convenient to operate, steel wire coils can be efficiently and conveniently taken and placed without emptying the pickling tank after pickling, so that the weak pickling efficiency of the high-strength corrosion-resistant steel wires is remarkably improved, the labor intensity of operators is reduced, and the device is suitable for performing weak pickling treatment on the high-strength corrosion-resistant steel wires in batches in factories.

Description

Technical Field

[0001] This invention relates to the field of steel wire surface treatment technology, specifically to a high-efficiency weak acid washing device for high-strength corrosion-resistant steel wire. Background Technology

[0002] After heat treatment, a dense oxide layer forms on the surface of steel wire. This oxide layer affects the appearance and quality of the steel wire and needs to be removed. A common removal method is weak acid washing. For example, Chinese patent document CN216998593U discloses a high-efficiency weak acid washing device for steel wire, including a weak acid washing tank. An acid inlet pipe is fixedly inserted into the top of the tank, and a hinged door is movably connected to one side of the tank. A rotary switch is provided on the outer wall of the door. A rinsing mechanism is installed inside the tank. This device uses the rinsing mechanism to drive multiple steel wire hooks on which the wire coils move up and down in a weak acid solution, thereby quickly rinsing the wire coils and accelerating the weak acid washing process. An acid recovery mechanism allows the used weak acid solution to be recovered and stored for reuse, reducing resource waste. This improves the efficiency of weak acid washing of steel wire, reduces the time required, and allows for the recycling of the weak acid solution, further minimizing resource waste.

[0003] However, the above-mentioned methods are inconvenient for handling and loading the wire coils, involve high labor intensity, and require emptying the pickling tank each time the wire coils are handled, making efficient operation impossible and unsuitable for mass weak acid pickling of high-strength corrosion-resistant steel wires in factories. Therefore, improvements are urgently needed in this field. Summary of the Invention

[0004] The purpose of this invention is to propose an efficient weak acid pickling device for high-strength corrosion-resistant steel wire, in order to solve the technical problems of inconvenient operation of steel wire coil handling, high labor intensity, and the need to empty the pickling tank every time the steel wire coil is handled, which makes it impossible to achieve efficient operation and unsuitable for batch weak acid pickling of high-strength corrosion-resistant steel wire in factories.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A high-efficiency weak acid pickling device for high-strength corrosion-resistant steel wire includes a pickling tank, a gantry, and a sliding frame. The pickling tank contains a dilute hydrochloric acid solution. Tracks are symmetrically arranged on both sides of the pickling tank. The gantry is connected to the tracks and can move along them via a drive device. The gantry frame is equipped with a lifting mechanism and a guide assembly. The lifting mechanism can drive the sliding frame to move up and down along the guide assembly. The bottom of the sliding frame is equipped with several hook assemblies for hanging steel wire rolls. When the sliding frame slides to the lowest set position, the steel wire rolls on the hook assemblies can be immersed in the dilute hydrochloric acid solution in the pickling tank. When the sliding frame slides to the highest set position, the steel wire rolls on the hook assemblies can be lifted above the pickling tank. Several ultrasonic generators and electric heaters are provided on the side wall of the pickling tank, and a high-pressure rinsing assembly for rinsing the steel wire rolls is provided at the top of the pickling tank.

[0006] Preferably, five pickling tanks are arranged sequentially along the moving direction of the gantry crane, and the mass concentrations of the dilute hydrochloric acid solution in each pickling tank from front to back are 60-120 g / L, 80-160 g / L, 120-180 g / L, 160-230 g / L, and 160-230 g / L, respectively, and the temperature of the dilute hydrochloric acid solution in each pickling tank is 30-40°C. By sequentially pickling the steel wire coil in pickling tanks of different concentrations, efficient and high-quality cleaning of the steel wire coil can be achieved.

[0007] Preferably, the drive device includes a traveling wheel and a reduction motor. The axle of the traveling wheel is rotatably connected to the support of the gantry, and the traveling wheel is rolled on the track. The reduction motor is fixedly connected to the support of the gantry through a motor mount, and the output shaft of the reduction motor is drively connected to the axle of the traveling wheel.

[0008] Preferably, the lifting mechanism includes an electric hoist, on which a traction rope is wound, and the movable end of the traction rope is fixedly connected to the top center of the sliding frame.

[0009] Preferably, the guide assembly includes guide rods fixed in an array on the truss, the bottom end of the guide rods being fixedly connected to the bracket on the corresponding side of the truss via a connecting rod, the sliding frame being rectangular plate-shaped, and the four corners of the sliding frame being provided with sliding holes for sliding connection with the guide rods. This arrangement can ensure the smooth lifting and lowering movement of the suspension frame.

[0010] Preferably, the hook assembly includes a vertical rod or a steel cable, and a hook is connected to the bottom of the vertical rod or steel cable to facilitate hanging the wire coil.

[0011] Preferably, hooks are symmetrically arranged on both sides of the bottom of the vertical rod or steel cable to improve pickling efficiency.

[0012] Preferably, the high-pressure rinsing assembly includes an annular rinsing pipe disposed on the inner side wall of the top of the pickling tank. A high-pressure nozzle is disposed on the annular rinsing pipe at a downward angle toward the center of the pickling tank. The water inlet of the annular rinsing pipe is connected to the bottom of the pickling tank through a circulation pipeline outside the pickling tank. A shut-off valve, a drain outlet, a filter, a spray pump, and a check valve are sequentially disposed along the medium flow direction on the circulation pipeline. A drain plug is threaded onto the drain outlet. This arrangement allows for quick backwashing and drainage of the filter, which is beneficial for ensuring the stable operation of the spray pump. During backwashing, the shut-off valve is closed, the spray pump is stopped, and the drain plug is opened. The residual dilute hydrochloric acid solution in the spray pump will backwash the filter, and the impurities after rinsing can be discharged through the drain outlet.

[0013] Preferably, a PLC controller is installed on the outside of the side wall of the pickling tank, and the ultrasonic generator, electric heater and spray pump are all electrically connected to the PLC controller to realize the operation control of the ultrasonic generator and spray pump.

[0014] The present invention also includes other components that enable its normal use, all of which are conventional means in the art. In addition, devices or components not limited in the present invention, such as geared motors, gantry cranes, electric hoists, spray pumps, ultrasonic generators, PLC controllers, electric heaters, etc., all adopt the prior art in the art.

[0015] The working principle of this invention is as follows: First, the gantry crane is moved to one side of the pickling tank. Then, the lifting mechanism lowers the suspension frame to a suitable position, allowing the operator to suspend the wire roll on the hook assembly. Next, the lifting mechanism is operated to raise the suspension frame until the wire roll on the hook assembly is above the top of the pickling tank. Then, the gantry crane is moved to bring the wire roll directly above the pickling tank. The lifting mechanism is then operated again to move the suspension frame downwards along the guide assembly, ultimately immersing the wire roll in the dilute hydrochloric acid solution. The ultrasonic generator and electric heater are activated to maintain the temperature of the dilute hydrochloric acid solution at 30-40°C, enabling efficient weak acid pickling of the wire roll. After pickling, the lifting mechanism is operated again to slowly move the wire roll upwards. Simultaneously, the high-pressure flushing assembly is activated to flush the wire roll that has leaked dilute hydrochloric acid solution, causing any remaining reactants on the wire roll to fall off under the high-pressure flushing action, thus ensuring the pickling effect on the wire roll. After high-pressure rinsing, the wire roll is held above the pickling tank for 20-60 seconds to drain the residual dilute hydrochloric acid solution. Then, the gantry crane is moved to one side of the pickling tank, and the lifting mechanism is used to lower the suspension frame, making it easier for the operator to remove the cleaned wire roll from the hook assembly for the next production process.

[0016] Compared with the prior art, the invention has the following beneficial effects: The invention has a simple structure, is easy to operate, has a good pickling effect, and does not require emptying the pickling tank after pickling, thus achieving efficient and convenient handling of steel wire coils. This significantly improves the weak pickling efficiency of high-strength corrosion-resistant steel wire and reduces the labor intensity of operators. It is suitable for batch weak pickling of high-strength corrosion-resistant steel wire in factories. Attached Figure Description

[0017] The invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a schematic diagram of the overall structure of the hook assembly of the present invention when it is raised above the pickling tank in the embodiment.

[0018] Figure 2 for Figure 1 A magnified schematic diagram of part A in the middle.

[0019] Figure 3 This is a schematic diagram of the overall structure of the hook assembly of the present invention when it descends into the pickling tank in an embodiment.

[0020] Figure 4 This is a top view of the connection structure between the annular rinsing pipe and the pickling tank in Embodiment 1 of the present invention.

[0021] Figure 5 This is a schematic diagram of the arrangement of the five pickling tanks of the present invention along the moving direction of the gantry crane in Embodiment 1. Detailed Implementation

[0022] The invention will now be clearly described in conjunction with the accompanying drawings and specific embodiments. This description is merely for illustrative purposes and is not intended to limit the invention. Any modifications, equivalent substitutions, or improvements made by those skilled in the art based on the embodiments of the invention without inventive effort to obtain all other embodiments should be included within the scope of protection of the invention.

[0023] Example 1 like Figure 1-3As shown, this embodiment provides a high-efficiency weak acid pickling device for high-strength corrosion-resistant steel wire, including a pickling tank 1, a gantry 2, and a sliding frame 3. Tracks 4 are symmetrically arranged on both sides of the pickling tank. The gantry is connected to the tracks via a drive device. A lifting mechanism and a guide assembly are provided on the gantry frame. The lifting mechanism can drive the sliding frame to move up and down along the guide assembly. Several hook assemblies for hanging steel wire coils are provided at the bottom of the sliding frame. When the sliding frame slides to the lowest set position, the steel wire coils (not shown in the figure) on the hook assemblies can be immersed in the dilute hydrochloric acid solution in the pickling tank. When the sliding frame slides to the highest set position, the steel wire coils on the hook assemblies can be lifted above the pickling tank. Several ultrasonic generators 5 and electric heaters (not shown in the figure) are provided on the side wall of the pickling tank, and a high-pressure rinsing assembly for rinsing the steel wire coils is provided at the top of the pickling tank.

[0024] In this embodiment, as Figure 5 As shown, five pickling tanks are arranged sequentially along the moving direction of the gantry crane. The mass concentrations of the dilute hydrochloric acid solution in each pickling tank from front to back are 60-120 g / l, 80-160 g / l, 120-180 g / l, 160-230 g / l, and 160-230 g / l, respectively. The temperature of the dilute hydrochloric acid solution in each pickling tank is 30-40℃. By sequentially pickling the steel wire roll in pickling tanks of different concentrations, it is helpful to achieve efficient and high-quality cleaning of the steel wire roll.

[0025] Specifically, please refer to Figure 1 , Figure 2 The driving device includes a traveling wheel 6 and a reduction motor 7. The axle of the traveling wheel is rotatably connected to the support of the gantry, and the traveling wheel is rolled on the track. The reduction motor is fixedly connected to the support of the gantry through a motor mount, and the output shaft of the reduction motor is drivenly connected to the axle of the traveling wheel.

[0026] like Figure 1-2 As shown, in this embodiment, the lifting mechanism includes an electric hoist 8, on which a traction rope 9 is wound, and the movable end of the traction rope is fixedly connected to the top center of the sliding frame. The guide assembly includes guide rods 10 fixed in an array on the truss, the bottom end of which is fixedly connected to a bracket on the corresponding side of the truss via a connecting rod 11. The sliding frame is rectangular, and the four corners of the sliding frame are provided with sliding holes (not shown in the figure) for sliding connection with the guide rods. This arrangement ensures the smooth lifting and lowering movement of the suspension frame.

[0027] Following the above embodiments, please refer to Figure 1 , Figure 2 The hook assembly includes a vertical rod 12, and hooks 13 are symmetrically arranged on both sides of the bottom of the vertical rod to facilitate hanging the wire coil and improve pickling efficiency.

[0028] For more details, please refer to Figure 1-4 The high-pressure rinsing assembly includes an annular rinsing pipe 14 disposed on the inner side wall of the top of the pickling tank. A high-pressure nozzle 15 is inclined downward on the annular rinsing pipe and faces the center of the pickling tank. The water inlet of the annular rinsing pipe is connected to the bottom of the pickling tank through a circulation pipe 16 outside the pickling tank. A shut-off valve 17, a drain port 18, a filter 19, a spray pump 20, and a check valve 21 are sequentially disposed along the medium flow direction on the circulation pipe. A drain plug 22 is threadedly connected to the drain port. This arrangement allows for quick backwashing and drainage of the filter, which is beneficial to ensuring the stable operation of the spray pump. During backwashing, the shut-off valve is closed, the spray pump is stopped, and the drain plug is opened. The dilute hydrochloric acid solution remaining in the spray pump will backwash the filter, and the impurities after rinsing can be discharged through the drain port. More specifically, a feed port 23 for adding dilute hydrochloric acid solution is also provided on the top side of the pickling tank.

[0029] In this embodiment, please refer to Figure 1-2 A PLC controller 24 is installed on the outside of the side wall of the pickling tank. The ultrasonic generator, electric heater and spray pump are all electrically connected to the PLC controller to realize the operation control of the ultrasonic generator and spray pump.

[0030] Example 2 The only difference between this embodiment and Embodiment 1 is that the hook assembly includes a steel cable (not shown in the figure), and hooks are symmetrically arranged on both sides of the bottom of the steel cable.

[0031] The working principle of this invention is as follows: First, the gantry crane is moved to one side of the pickling tank. Then, the lifting mechanism lowers the suspension frame to a suitable position, allowing the operator to suspend the wire roll on the hook assembly. Next, the lifting mechanism is operated to raise the suspension frame until the wire roll on the hook assembly is above the top of the pickling tank. Then, the gantry crane is moved to bring the wire roll directly above the pickling tank. The lifting mechanism is operated again to move the suspension frame downwards along the guide assembly, ultimately immersing the wire roll in the dilute hydrochloric acid solution. The ultrasonic generator and electric heater are activated to maintain the temperature of the dilute hydrochloric acid solution at 30-40°C, enabling efficient weak acid pickling of the wire roll. After pickling, the lifting mechanism is operated again to slowly move the wire roll upwards. Simultaneously, the high-pressure flushing assembly is activated to flush the wire roll that has leaked dilute hydrochloric acid solution, causing any remaining reactants to fall off under the high-pressure flushing, thus ensuring the pickling effect on the wire roll. After high-pressure rinsing, the wire roll is held above the pickling tank for 20-60 seconds to drain any residual dilute hydrochloric acid solution. Then, the gantry crane is moved to the next pickling tank and the process is repeated. The wire roll is pickled in each pickling tank for 10-30 minutes. Finally, the gantry crane is moved to the rear of the last pickling tank, and the lifting mechanism is used to lower the suspension frame, making it easy for the operator to remove the cleaned wire roll from the hook assembly for the next production process.

[0032] The above description is merely a preferred embodiment of the present invention and is not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A high-efficiency weak pickling device for high-strength corrosion-resistant steel wire, comprising a pickling tank, wherein a dilute hydrochloric acid solution is contained in the pickling tank, characterized in that: The acid pickling tank is provided with rails on both sides, and the derrick is movably connected to the rails through a driving device. ​ 2. The high-efficiency weak pickling device for high-strength corrosion-resistant steel wire according to claim 1, characterized in that: Five acid pickling tanks are arranged in sequence along the moving direction of the derrick, and the mass concentrations of the dilute hydrochloric acid solutions in the acid pickling tanks from front to back are 60-120 g / l, 80-160 g / l, 120-180 g / l, 160-230 g / l and 160-230 g / l respectively, and the temperatures of the dilute hydrochloric acid solutions in the acid pickling tanks are all 30-40 ℃.

3. The high-efficiency weak pickling device for high-strength corrosion-resistant steel wire according to claim 1, characterized in that: The driving device comprises walking wheels and a reduction motor, the wheel shafts of the walking wheels are rotatably connected to the supports of the derrick, and the walking wheels are rollingly connected to the rails, the reduction motor is fixedly connected to the supports of the derrick through a motor base, and the output shaft of the reduction motor is in transmission connection with the wheel shafts of the walking wheels.

4. The high-efficiency weak pickling device for high-strength corrosion-resistant steel wire according to claim 1, characterized in that: The lifting mechanism comprises an electric hoist, a traction rope is wound on the electric hoist, and the movable end of the traction rope is fixedly connected to the top center of the sliding frame.

5. The high-efficiency weak pickling device for high-strength corrosion-resistant steel wire according to claim 1, characterized in that: The guide assembly comprises guide rods fixed in an array on the truss, the bottom ends of the guide rods are fixedly connected to the supports on the corresponding sides of the derrick through connecting rods, the sliding frame is in the shape of a rectangular plate, and the four corners of the sliding frame are provided with sliding holes for sliding connection with the guide rods.

6. The high-efficiency weak pickling device for high-strength corrosion-resistant steel wire according to claim 1, characterized in that: The hook assembly comprises a vertical rod or a steel cable, and the bottom of the vertical rod or the steel cable is connected with a hook.

7. The high-efficiency weak pickling device for high-strength corrosion-resistant steel wire according to claim 6, characterized in that: The bottom of the vertical rod or the steel cable is provided with hooks symmetrically on both sides.

8. The high-efficiency weak pickling device for high-strength corrosion-resistant steel wire according to claim 1, characterized in that: The high-pressure flushing assembly comprises an annular flushing pipe arranged on the inner side wall of the top of the acid pickling tank, a high-pressure nozzle inclined downward on the annular flushing pipe and facing the center of the acid pickling tank, a water inlet end of the annular flushing pipe in communication with the bottom side of the acid pickling tank through a circulating pipeline outside the acid pickling tank, a stop valve, a blowdown port, a filter, a spray pump and a check valve arranged in sequence along the medium flow direction on the circulating pipeline, and a blowdown plug threadedly connected to the blowdown port.

9. The high-efficiency weak pickling device for high-strength corrosion-resistant steel wire according to claim 8, characterized in that: The acid pickling tank is provided with a PLC controller outside the side wall, and the ultrasonic generator, the electric heater and the spray pump are electrically connected to the PLC controller.

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