A control method of a wire rod conveying and unloading device and the wire rod conveying and unloading device

Abstract

The present application relates to the technical field of wire rod, and discloses a control method of wire rod conveying and uncoiling device and the wire rod conveying and uncoiling device, the control method of wire rod conveying and uncoiling device comprises the following steps: S1, initial state inspection; S2, C hook in place and clamping; S3, uncoiling trolley holds up the coil; S4, uncoiling trolley moves to the cross-moving trolley storage rack; S5, uncoiling trolley tray drops and the coil is stored; S6, uncoiling trolley returns to the C hook position; S7, cross-moving trolley moves horizontally and the crane hoists; the present application can improve the uncoiling efficiency, reduce manual intervention and waiting time, and improve the safety and reliability of the uncoiling process by setting PLC, uncoiling trolley and cross-moving trolley.

Description

Technical Field

[0001] This invention relates to the field of wire technology, specifically to a control method for a wire conveying and unwinding device and the wire conveying and unwinding device itself. Background Technology

[0002] Wire rod is the smallest type of hot-rolled steel in terms of cross-sectional dimensions. In my country, hot-rolled round steel with a diameter of 5.5–22 mm is generally called wire rod, which is also known as wire bar because it is delivered in coils. The concept of wire rod is slightly different abroad than in my country. In addition to round cross-sections, there are other shapes. Its diameter varies depending on demand and production technology. According to different rolling mills, it can be divided into high-speed wire rod (high wire) and ordinary wire rod (ordinary wire). Wire rod is generally made of ordinary carbon steel and high-quality carbon steel. According to different steel classification catalogs and uses, wire rod includes ordinary low-carbon steel hot-rolled round wire rod, high-quality carbon steel wire rod, carbon welding rod wire rod, quenched and tempered threaded wire rod, wire rod for making steel wire rope, wire rod for piano wire, and stainless steel wire rod, etc.

[0003] Currently, after wire rod production is completed, it needs to be conveyed and unloaded, which involves the use of wire rod conveying and unwinding devices. However, during use, the unwinding process often relies on manual operation and control, which leads to low unwinding efficiency and is prone to operational errors and safety hazards. In addition, it requires staff to judge the movement path and unwinding sequence of the unwinding trolley, which is time-consuming, labor-intensive, and inefficient. Summary of the Invention

[0004] The purpose of this invention is to provide a control method and a wire conveying and unwinding device to solve the problems of low efficiency in the unwinding process and low precision of manual operation in some wire conveying and unwinding processes, which leads to many safety hazards.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a control method for a wire conveying and unwinding device, the device comprising a buffer and an unwinding trolley, and further comprising:

[0006] The steel rails are located at the bottom of the unloading trolley;

[0007] A pad is installed at the bottom of the rail. A cable chain is installed on one side of the pad. A cable chain fixing plate is installed at the bottom of the cable chain. A nut is installed at the top of the cable chain. A washer and a pressure plate are respectively installed on the outside of the nut. A rail support column is installed on one side of the cable chain. A transverse trolley is installed on one side of the rail support column. A bottom beam is installed at the bottom of the transverse trolley. A clamping plate is installed on one side of the bottom beam. The system also includes the following steps:

[0008] S1. Initial Status Check: After the PLC system is started, an initial status check is performed first, including the status confirmation of each sensor, solenoid valve, and motor.

[0009] S2, C-hook positioning and clamping: When the PF line moves with the coil to the unloading station and sends a fault-free signal, the C-hook clamp fixes the coil.

[0010] S3. Unloading trolley lifts the coil: The PLC sends a command to control the hydraulic solenoid valve of the unloading trolley to lift the tray and lift the coil.

[0011] S4. The unloading trolley moves to the transverse trolley storage rack: The PLC determines whether the unloading trolley moves to the far end or the near end of the storage rack based on the status of the transverse trolley storage rack.

[0012] S5. Lowering of the unloading trolley pallet and storage of the coil: The PLC sends a command to control the hydraulic solenoid valve of the unloading trolley lifting action, so that the unloading trolley pallet is lowered and the coil is placed on the storage rack of the transverse trolley.

[0013] S6. The unloading trolley returns to the C-hook position: The PLC issues a command to control the unloading trolley to return to the C-hook position, preparing for the next unloading.

[0014] S7. Lateral movement of the trolley and lifting by the crane: When all three positions on the lateral movement trolley storage rack are filled with rolls and the crane unloading positions are all empty, the PLC issues a command to control the hydraulic solenoid valve of the lateral movement trolley, so that the lateral movement trolley moves smoothly.

[0015] Preferably, in step S1, when confirming the status of each device, it is also necessary to check whether there are fault signals on the PF line, the unwinding trolley, and the traverse trolley.

[0016] Preferably, in step S2, the PLC receives a fault-free signal from the PF line and a signal indicating that the C-hook is clamped, confirming that the reel is stably fixed on the C-hook.

[0017] Preferably, in step S3, after the pallet is raised to the position, it is confirmed by the upper proximity switch of the unloading trolley. In step S4, when the unloading trolley starts to move, the frequency converter receives the PLC signal and accelerates the unloading trolley to a high-speed level according to the set acceleration.

[0018] Preferably, when the unloading trolley moves to the deceleration point at the first position signal, the frequency converter decreases from high speed to low speed according to the set deceleration rate. When the unloading trolley moves to the stop point at the second position signal, the frequency converter stops running and the unloading trolley decelerates and stops.

[0019] Preferably, in step S5, after the pallet descends to the designated position, the lower position proximity switch of the unloading trolley confirms the descent. In step S6, during the return process of the unloading trolley, the speed and acceleration are also controlled by the frequency converter.

[0020] Preferably, each storage rack of the transverse trolley has four proximity switches to generate deceleration and stop signals, the maximum speed of the unloading trolley is 700 mm / s, and the distance between the deceleration and stop sensing switches is 250 mm.

[0021] Preferably, in step S5, when the unloading trolley moves to the transverse trolley storage rack, the lifting action is controlled by the hydraulic solenoid valve for the lifting action of the unloading trolley when the lifting solenoid valve is energized; when the lowering solenoid valve is energized, the unloading trolley tray is lowered. The lifting position and the lowering position are indicated by the upper position proximity switch and the lower position proximity switch of the unloading trolley, respectively.

[0022] Preferably, in step S7, after the traverse trolley reaches the designated position, the position indication proximity switch confirms the arrival. After the crane lifts the coil off the traverse trolley, the photoelectric switch sends a coil departure signal.

[0023] The present invention also provides a wire conveying and unwinding device, including a buffer and an unwinding trolley, and further comprising:

[0024] The steel rails are located at the bottom of the unloading trolley;

[0025] A pad is installed at the bottom of the rail. A drag chain is installed on one side of the pad. A drag chain fixing plate is installed at the bottom of the drag chain. A nut is installed at the top of the drag chain. A washer and a pressure plate are respectively installed on the outside of the nut. A rail support column is installed on one side of the drag chain. A transverse trolley is installed on one side of the rail support column. A bottom beam is installed at the bottom of the transverse trolley. A clamping plate is installed on one side of the bottom beam.

[0026] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0027] This invention utilizes a precise PLC system for control. Upon startup, the PLC system performs an initial status check, accurately confirming the status of each device and ensuring the smooth operation of the entire unloading process. This allows the device to monitor and respond to equipment status in real time, achieving automated and intelligent control. By incorporating a C-hook clamp, when the PF line carrying the coil moves to the unloading station and sends a fault-free signal, the C-hook clamp quickly secures the coil, preventing it from shifting or falling during unloading and ensuring stable clamping, thus improving unloading safety and efficiency. Furthermore, by using hydraulic solenoid valves, the PLC precisely controls the lifting and lowering of the unloading trolley's pallet via the hydraulic solenoid valves, ensuring smooth lifting and lowering of the coil. The unloading trolley operates more precisely and smoothly, reducing the risk of damage to coils during transport. By setting the PLC to adjust the position of the unloading trolley according to the status of the traverse trolley storage rack, the unloading efficiency is improved, making the movement of the unloading trolley more reasonable and efficient. With the automatic return function, the PLC sends a command to control the unloading trolley to automatically return to the C-hook position after completing the unloading task, preparing for the next unloading, which can shorten the unloading cycle and improve production efficiency. By setting the smooth traverse function of the traverse trolley, when all three positions on the traverse trolley storage rack are filled and the crane unloading position is empty, the PLC sends a command to control the hydraulic solenoid valve of the traverse trolley to make it move smoothly, which can ensure the smooth lifting of coils and reduce safety hazards during the lifting process. Attached Figure Description

[0028] Figure 1 A schematic flowchart of a preferred embodiment of the control method for the wire conveying and unwinding device provided by the present invention;

[0029] Figure 2 A schematic diagram of a preferred embodiment of the wire conveying and unwinding device provided by the present invention;

[0030] Figure 3 Another structural schematic diagram of the wire conveying and unwinding device provided by the present invention;

[0031] Figure 4 Provided by the present invention Figure 2 An enlarged schematic diagram of the structure at point A is shown below;

[0032] Figure 5 Provided by the present invention Figure 3 A magnified schematic diagram of the structure at point B shown.

[0033] In the diagram: 1. Buffer; 2. Unwinding trolley; 3. Rail; 4. Pad; 5. Cable chain; 6. Rail support column; 7. Lateral trolley; 8. Clamping plate; 9. Bottom beam; 10. Nut; 11. Washer; 12. Pressure plate; 13. Cable chain fixing plate. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, those skilled in the art who have not made any innovative embodiments are all within the scope of protection of the present invention.

[0035] Please see Figures 1-5 As shown, a control method for a wire conveying and unwinding device includes the wire conveying and unwinding device, which includes a buffer 1 and an unwinding trolley 2, and further includes:

[0036] The steel rail 3 is installed at the bottom of the unloading trolley 2;

[0037] A pad 4 is installed at the bottom of the rail 3. A drag chain 5 is installed on one side of the pad 4. A drag chain fixing plate 13 is installed at the bottom of the drag chain 5. A nut 10 is installed at the top of the drag chain 5. A washer 11 and a pressure plate 12 are respectively installed on the outside of the nut 10. A rail support column 6 is installed on one side of the drag chain 5. A transverse trolley 7 is installed on one side of the rail support column 6. A bottom beam 9 is installed at the bottom of the transverse trolley 7. A clamping plate 8 is installed on one side of the bottom beam 9. The following steps are also included:

[0038] S1. Initial Status Check: After the PLC system starts up, it first performs an initial status check, including the status confirmation of each sensor, solenoid valve, and motor. The PLC system can immediately confirm the status of all relevant equipment after startup, which can prevent production interruptions caused by equipment failure or abnormal status and improve the stability and reliability of the system.

[0039] S2. C-hook positioning and clamping: When the PF line moves the coil to the unloading station and sends a fault-free signal, the C-hook clamping device fixes the coil. The automated execution of the C-hook clamping device can reduce the reliance on manual operation, improve work efficiency and safety. At the same time, the clamping of the C-hook also ensures the stability of the coil in subsequent operations, avoiding the risk of the coil slipping or being damaged.

[0040] S3. Unloading trolley 2 lifts the coil: The PLC sends a command to control the hydraulic solenoid valve of the unloading trolley 2 to lift the tray and lift the coil. Under the action of the PLC, the work efficiency can be improved, while ensuring the accuracy and stability of the tray lifting. The movement of the unloading trolley 2 is driven by a motor, which is controlled by a frequency converter, and the frequency converter should be located in the electrical control room.

[0041] S4. The unloading trolley 2 moves to the storage rack of the transverse trolley 7: The PLC determines whether the unloading trolley 2 moves to the far end or the near end of the storage rack based on the status of the transverse trolley 7 storage rack. Adjusting the position of the unloading trolley 2 allows the entire device to operate efficiently, avoiding overcrowding or idleness of the storage rack. It also improves the flexibility and adaptability of the device. The transverse trolley 7 has four winding positions. Two positions are used for loading windings when they are in a straight line with the unloading trolley 2, and the other two positions are used for unloading windings by the crane. When the transverse trolley 7 moves laterally, the two positions are interchanged.

[0042] S5. Lowering the tray of the unloading trolley 2 and storing the coil: The PLC issues a command to control the hydraulic solenoid valve of the lifting action of the unloading trolley 2, so that the tray of the unloading trolley 2 is lowered and the coil is placed on the storage rack of the transverse trolley (7); under the action of the PLC, it can be ensured that the coil can be accurately placed on the storage rack of the transverse trolley 7, avoiding damage or misalignment of the coil.

[0043] S6. Unloading trolley 2 returns to the C-hook position: The PLC issues a command to control the unloading trolley 2 to return to the C-hook position, preparing for the next unloading operation; under the control of the PLC, it can be ensured that the unloading trolley can always stay in the correct position, which facilitates subsequent unloading operations.

[0044] S7. Lateral movement of the lateral trolley 7 and crane lifting: When all three positions on the storage rack of the lateral trolley 7 are filled with coils, and the unloading positions of the crane are all vacant, the PLC issues a command to control the hydraulic solenoid valve of the lateral trolley 7, so that the lateral trolley 7 moves smoothly laterally. This smooth lateral movement of the lateral trolley ensures the safety and stability of the coils during the movement.

[0045] refer to Figure 1 As shown in step S1, when confirming the status of each device, it is also necessary to check whether there are fault signals on the PF line, the unloading trolley 2, and the transverse trolley 7. Checking the electrical signals of each device can ensure that each device is working properly, thereby ensuring the smooth operation of the wire conveying and unloading process.

[0046] In S2, the PLC receives the fault-free signal from the PF line and the signal indicating that the C-hook is clamped, confirming that the reel is stably fixed on the C-hook. The C-hook's fixation facilitates subsequent conveying and unloading of the reel.

[0047] In step S3, after the pallet is raised to its position, it is confirmed by the upper proximity switch of the unloading trolley 2. In step S4, when the unloading trolley 2 starts to move, the frequency converter receives a signal from the PLC and accelerates the unloading trolley 2 to a high-speed horizontal position according to the set acceleration. Under the action of the PLC, the unloading trolley 2 can work quickly, improving the efficiency of coil loading and unloading.

[0048] When the unloading trolley 2 reaches the deceleration point at the first position signal, the frequency converter gradually decreases from high speed to low speed according to the set deceleration rate. When the unloading trolley 2 reaches the stop point at the second position signal, the frequency converter stops running, and the unloading trolley 2 decelerates and stops. This ensures the conveying efficiency of the unloading trolley 2 while it is in motion, and at the same time, under the control of the PLC, the movement of the unloading trolley can maintain a high degree of precision.

[0049] In S5, after the pallet descends to the position, the lower proximity switch of the unloading trolley 2 confirms the arrival. In S6, during the return process of the unloading trolley 2, the speed and acceleration are also controlled by the frequency converter.

[0050] Each storage rack of the transverse trolley 7 has 4 proximity switches to generate deceleration and stop signals. The maximum speed of the unloading trolley 2 is 700 mm / s, and the distance between the deceleration and stop sensing switches is 250 mm.

[0051] In S5, when the unloading trolley 2 moves to the storage rack of the transverse trolley 7, the coil is placed on the storage rack. The lifting action is controlled by the hydraulic solenoid valve of the unloading trolley 2. When the lifting solenoid valve is energized, the tray of the unloading trolley 2 rises; when the lowering solenoid valve is energized, the tray of the unloading trolley 2 lowers. The lifting and lowering positions are indicated by the upper and lower proximity switches of the unloading trolley 2, respectively. Under the action of the solenoid valve and the PLC, the stability of the unloading trolley 2 during operation can be further ensured.

[0052] In S7, after the traverse trolley 7 reaches the designated position, it is confirmed by the position indication proximity switch. After the crane lifts the coil from the traverse trolley 7, the photoelectric switch sends a coil departure signal. During normal operation of this device, the unloading trolley 2 can only move towards the traverse trolley 7 when the traverse trolley 7 is stopped in one of two positions and the storage position is empty, and the unloading trolley 2 pallet is being upgraded. Similarly, the traverse trolley 7 can only move towards the traverse trolley 7 when the unloading trolley 2 is stopped in the C-hook position. Furthermore, the PF line transport system C-hook can only enter the unloading station when the unloading trolley 2 pallet is lowered and the C-hook is allowed to enter. Finally, the PF line transport system C-hook can only leave the unloading position when the unloading trolley 2 has completed its work, and the unloading trolley can only move towards the C-hook position when the unloading trolley 2 pallet is lowered.

[0053] Working Principle: When workers need to transport and unload wire using this device, the PF wire, carrying the coil, first moves to the unloading station. When the PF wire sends a fault-free signal, and the C-hook has clamped the coil and the no-coil signal is normal, the PLC system controls the lifting and lowering hydraulic solenoid valve of the unloading trolley 2, causing the tray of the unloading trolley 2 to rise and lift the coil. The PLC system adjusts the movement direction of the unloading trolley 2 according to the status of the storage rack on the transverse trolley 7. When the remote storage rack is idle, the unloading trolley 2 will move to the remote end; conversely... If the coil is moved to the near end, the PLC system will control the speed and acceleration of the unloading trolley 2 via the frequency converter to ensure a smooth and efficient movement. When the unloading trolley 2 reaches the designated position, the PLC system will control it to decelerate and stop. After the unloading trolley 2 reaches the designated position, the PLC system will again control the lifting action of the unloading trolley 2 hydraulic solenoid valve to lower the pallet and place the coil onto the storage rack of the transverse trolley 7. After the pallet is lowered into place, the PLC system will confirm and send a signal, and then the PLC system will control the unloading... The winding trolley 2 returns to the C-hook position, ready for the next unloading operation. When all three positions on the storage rack of the transverse trolley 7 are full of coils, and the crane unloading positions are all empty, the PLC system will control the transverse trolley 7 to smoothly move the coils to a position where the crane can lift them. This device also has interlocking and protection functions. The unloading trolley 2 can only move when the transverse trolley 7 is stopped at the designated position and the storage position is empty. Similarly, the transverse trolley 7 can only move when the unloading trolley 2 is stopped at the C-hook position. Only when the pallet of vehicle 2 is lowered and the C-hook is allowed to enter can the C-hook of the PF line transport system enter the unloading station. The interlocking and protection functions ensure the safety and stability of the entire unloading process. At the same time, the PF line PLC is equipped with alarm, monitoring and protection functions. The drive station is equipped with chain jamming and floating protection switches. At the tensioning device, there are over-tightening and over-loosening detection switches. There are also air pressure electrical contact pressure detection to detect the air supply pressure range. When the limit is exceeded, an alarm is triggered and the system stops. The PLC is also equipped with equipment fault codes, with digital codes indicating the fault point and nature.

[0054] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element. Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A control method for a wire conveying and unwinding device, characterized in that, The device includes a wire conveying and unwinding apparatus, which comprises a buffer (1) and an unwinding trolley (2), and also includes... The steel rail (3) is set at the bottom of the unloading trolley (2); A pad (4) is set at the bottom of the rail (3). A drag chain (5) is set on one side of the pad (4). A drag chain fixing plate (13) is set at the bottom of the drag chain (5). A nut (10) is set at the top of the drag chain (5). A washer (11) and a pressure plate (12) are respectively set on the outside of the nut (10). A rail support column (6) is set on one side of the drag chain (5). A transverse trolley (7) is set on one side of the rail support column (6). A bottom beam (9) is set at the bottom of the transverse trolley (7). A clamping plate (8) is set on one side of the bottom beam (9). The following steps are also included: S1. Initial Status Check: After the PLC system is started, an initial status check is performed first, including the status confirmation of each sensor, solenoid valve, and motor. S2, C-hook positioning and clamping: When the PF line moves with the coil to the unloading station and sends a fault-free signal, the C-hook clamp fixes the coil. S3, Unloading trolley (2) lifts the coil: The PLC sends a command to control the lifting action of the unloading trolley (2) hydraulic solenoid valve, so that the unloading trolley (2) pallet is raised and the coil is lifted; S4. The unloading trolley (2) moves to the storage rack of the transverse trolley (7): The PLC determines whether the unloading trolley (2) moves to the far end or the near end storage rack according to the status of the storage rack of the transverse trolley (7); S5. Unloading trolley (2) tray descent and coil storage: The PLC sends a command to control the hydraulic solenoid valve of the unloading trolley (2) lifting action, so that the tray of the unloading trolley (2) is lowered and the coil is placed on the storage rack of the transverse trolley (7). S6. Unloading trolley (2) returns to C-hook position: PLC issues a command to control unloading trolley (2) to return to C-hook position, ready for the next unloading; S7. Lateral movement of the trolley (7) and hoisting by the crane: When all three positions on the storage rack of the trolley (7) are filled with rolls and the unloading positions of the crane are all empty, the PLC issues a command to control the hydraulic solenoid valve of the trolley (7) so that the trolley (7) moves smoothly.

2. The control method for a wire conveying and unwinding device according to claim 1, characterized in that, In S1, when confirming the status of each device, it is also necessary to check whether there are fault signals in the PF line, the unwinding trolley (2) and the transverse trolley (7).

3. The control method for a wire conveying and unwinding device according to claim 1, characterized in that: In S2, the PLC receives the fault-free signal of the PF line and the signal that the C-hook is clamped, confirming that the reel is stably fixed on the C-hook.

4. The control method for a wire conveying and unwinding device according to claim 1, characterized in that: In S3, after the pallet is raised to the position, it is confirmed by the upper proximity switch of the unloading trolley (2). In S4, when the unloading trolley (2) starts to move, the frequency converter receives the PLC signal and accelerates the unloading trolley (2) to a high speed level according to the set acceleration.

5. The control method for a wire conveying and unwinding device according to claim 4, characterized in that: When the unloading trolley (2) moves to the deceleration point of the first position signal, the frequency converter decelerates from high speed to low speed according to the set deceleration. When the unloading trolley (2) moves to the stop point of the second position signal, the frequency converter stops running and the unloading trolley (2) decelerates and stops.

6. The control method for a wire conveying and unwinding device according to claim 1, characterized in that: In S5, after the tray descends to the position, it is confirmed by the lower position proximity switch of the unloading trolley (2). In S6, during the return process of the unloading trolley (2), the speed and acceleration are also controlled by the frequency converter.

7. The control method for a wire conveying and unwinding device according to claim 1, characterized in that: Each storage rack of the transverse trolley (7) has 4 proximity switches to generate deceleration and stop signals. The maximum speed of the unloading trolley (2) is 700 mm / s, and the distance between the deceleration and stop induction switches is 250 mm.

8. The control method for a wire conveying and unwinding device according to claim 1, characterized in that: In S5, when the unloading trolley (2) moves to the storage rack of the transverse trolley (7), the coil is placed on the storage rack. The lifting action is controlled by the hydraulic solenoid valve of the unloading trolley (2). When the lifting solenoid valve is energized, the tray of the unloading trolley (2) is raised. When the solenoid valve of the unloading trolley (2) is energized, the tray of the unloading trolley (2) descends. The lifting position and the descending position are indicated by the upper proximity switch of the unloading trolley (2) and the lower proximity switch of the unloading trolley (2), respectively.

9. The control method for a wire conveying and unwinding device according to claim 1, characterized in that: In S7, after the traverse trolley (7) reaches the designated position, it is confirmed by the position indication proximity switch. After the crane lifts the coil off the traverse trolley (7), the photoelectric switch sends a coil departure signal.

Images