Control method of wire conveying and coil unloading device and wire conveying and coil unloading device

Abstract

The invention relates to the technical field of wire rods, and discloses a control method of a wire rod conveying and coil unloading device and the wire rod conveying and coil unloading device.The control method of the wire rod conveying and coil unloading device comprises the following steps that S1, the initial state is checked; s2, the C-shaped hook is in place and clamped; s3, the coil is supported by the coil unloading trolley; s4, the coil unloading trolley is moved to a transverse moving trolley storage rack; s5, the coil stripping trolley tray descends, and coils are stored; s6, the coil stripping trolley returns to the position of the C-shaped hook; s7, transverse moving of the transverse moving trolley and hoisting of the crane are conducted; by arranging the PLC, the coil unloading trolley and the transverse moving trolley, the coil unloading efficiency can be improved, meanwhile, manual intervention and waiting time are reduced, and the safety and reliability of the coil unloading process are further improved.

Description

Technical Field

[0001] The present invention relates to the field of wire technology, and in particular to a control method for a wire conveying and unwinding device and a wire conveying and unwinding device. Background Art

[0002] Wire rod is the smallest cross-sectional size among hot-rolled steel sections. In my country, hot-rolled round steel supplied in coils with a diameter of 5.5 to 22 mm is called wire rod. Wire rod is also called wire rod because it is delivered in coils. The concept of wire rod abroad is slightly different from that in my country. In addition to the circular cross-section, it also has other shapes. Its diameter varies due to different demand conditions and production technology levels. According to different rolling mills, it can be divided into high-speed wire rod (high-speed wire) and ordinary wire rod (ordinary wire). Wire rod is generally made of ordinary carbon steel and high-quality carbon steel. According to the steel classification catalog and different uses, wire rod includes ordinary low-carbon steel hot-rolled round wire rod, high-quality carbon steel wire rod, carbon welding rod wire rod, tempered threaded wire rod, wire rod for wire rope, wire rod for piano wire and stainless steel wire rod, etc.

[0003] At present, after the production of wires, the wires need to be transported and loaded and unloaded, and a wire transport and unloading device will be used. However, during use, the unloading process often relies on manual operation and manual control, which leads to low unloading efficiency and is prone to operational errors and safety hazards. At the same time, the staff needs to judge the moving path and unloading order of the unloading trolley, which is time-consuming, labor-intensive and inefficient. Summary of the invention

[0004] The object of the present invention is to provide a control method for a wire conveying and unwinding device and a wire conveying and unwinding device to solve the problems of low efficiency of the unwinding process and low accuracy of manual operation during some wire conveying and unwinding processes, resulting in more safety hazards.

[0005] To achieve the above object, the present invention provides the following technical solution: a control method for a wire conveying and unwinding device, comprising the following steps:

[0006] S1. Initial status check: After the PLC system is started, the initial status check is first performed, including the status confirmation of various sensors, solenoid valves, motors and other equipment;

[0007] S2, C-type hook in place and clamping: When the PF line moves the coil to the unloading station with the coil and sends a fault-free signal, the C-type hook clamp fixes the coil;

[0008] S3, the unloading trolley lifts the coil: the PLC issues a command to control the hydraulic solenoid valve of the unloading trolley to lift the coil, so that the tray of the unloading trolley rises and lifts the coil;

[0009] S4, the unloading trolley moves to the transverse trolley storage rack: PLC determines whether the unloading trolley moves to the far-end or near-end storage rack according to the status of the transverse trolley storage rack;

[0010] S5, the pallet of the coil unloading trolley descends and the coil is stored: the PLC sends out instructions to control the hydraulic solenoid valve of the coil unloading trolley to lower the pallet of the coil unloading trolley and place the coil on the storage rack of the transverse trolley;

[0011] 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 to prepare for the next unloading;

[0012] S7, lateral movement of the lateral moving trolley and lifting by crane: When the three positions on the storage rack of the lateral moving trolley are filled with coils and the positions for unloading coils by the crane are all vacant, the PLC sends out a command to control the hydraulic solenoid valve of the lateral moving trolley to make the lateral moving trolley move smoothly.

[0013] Preferably, in said 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 and the transverse moving trolley.

[0014] Preferably, in S2, the PLC receives a fault-free signal of the PF line and a clamped signal of the C-hook, and confirms that the coil is stably fixed on the C-hook.

[0015] Preferably, in S3, after the pallet is lifted into position, it is confirmed by the upper proximity switch of the unloading trolley, and in 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.

[0016] 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, and 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.

[0017] Preferably, in said S5, after the pallet is lowered into position, it is confirmed by the lower proximity switch of the unloading trolley, and in said S6, during the return process of the unloading trolley, the speed and acceleration are also controlled by the frequency converter.

[0018] Preferably, there are 4 proximity switches on each storage rack of the transverse shift trolley, which are used to generate deceleration and stop signals from the first to the second roll respectively. The maximum speed of the unloading trolley is 700mm / s, and the distance between the deceleration and stop sensing switches is 250mm.

[0019] Preferably, in S5, when the unloading trolley moves to the storage rack of the transverse trolley, the coil is placed on the storage rack, and the lifting action is controlled by the hydraulic solenoid valve of the unloading trolley lifting action. When the rising solenoid valve is energized, the pallet of the unloading trolley rises; when the falling solenoid valve is energized, the pallet of the unloading trolley descends, and the lifting position and the descending position are indicated by the upper proximity switch of the unloading trolley and the lower proximity switch of the unloading trolley respectively.

[0020] Preferably, in S7, after the transverse moving trolley reaches the specified position, it is confirmed by the position indicating proximity switch, and after the crane lifts the coil from the transverse moving trolley, the photoelectric switch sends a coil leaving signal.

[0021] The present invention also provides a wire conveying and unloading device, comprising a buffer and an unloading trolley, and further comprising:

[0022] Steel rails arranged at the bottom of the coil unloading trolley;

[0023] A pad is arranged at the bottom of the rail, a drag chain is arranged on one side of the pad, a drag chain fixing plate is arranged at the bottom of the drag chain, a nut is arranged on the top of the drag chain, washers and pressure plates are arranged on the outside of the nut respectively, a rail supporting column is arranged on one side of the drag chain, a transverse trolley is arranged on one side of the rail supporting column, a bottom beam is arranged at the bottom of the transverse trolley, and a clamping plate is arranged on one side of the bottom beam.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] The present invention sets up precise control of the PLC system. After the PLC system is started, it performs an initial status check and can accurately confirm the status of each device, thereby ensuring the smooth progress of the entire unloading process, so that the device can monitor and respond to the equipment status in real time, and realize automatic and intelligent control. By setting up a C-hook clamp, when the PF line moves the coil to the unloading station with the coil and sends a fault-free signal, the C-hook clamp can quickly fix the coil to prevent it from shifting or falling during the unloading process, ensuring stable clamping of the coil, and improving the safety and efficiency of unloading. By setting up hydraulic solenoid valve control, the PLC can accurately control the raising and lowering of the tray of the unloading trolley by controlling the hydraulic solenoid valve of the unloading trolley lifting action, thereby stably lifting and lowering the coil, so that The movement of the unloading trolley is more precise and smooth, reducing the risk of damage to the coil during transportation. By setting the PLC to adjust the position of the unloading trolley according to the state of the transverse trolley storage rack, the unloading efficiency is improved, making the movement of the unloading trolley more reasonable and efficient. By setting the automatic return function, the PLC issues 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 transverse movement function of the transverse trolley, when the three positions on the transverse trolley storage rack are filled with coils and the crane unloading positions are vacant, the PLC issues a command to control the hydraulic solenoid valve of the transverse trolley to make it move smoothly, which can ensure the smooth lifting of the coil and reduce safety hazards during the lifting process. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic flow chart of a preferred embodiment of a control method for a wire conveying and unwinding device provided by the present invention;

[0027] Figure 2 A schematic structural diagram of a preferred embodiment of the wire conveying and unwinding device provided by the present invention;

[0028] Figure 3 This is a schematic structural diagram of the wire conveying and unwinding device provided by the present invention from another angle;

[0029] Figure 4 The present invention provides Figure 2 An enlarged schematic diagram of the structure at A is shown;

[0030] Figure 5 The present invention provides Figure 3 An enlarged schematic diagram of the structure at location B is shown.

[0031] In the figure: 1. Buffer; 2. Unloading trolley; 3. Rail; 4. Pad; 5. Drag chain; 6. Rail support column; 7. Transverse trolley; 8. Clamp; 9. Bottom beam; 10. Nut; 11. Washer; 12. Pressure plate; 13. Drag chain fixing plate. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] See also Figure 1 As shown, a control method for a wire conveying and unwinding device comprises the following steps:

[0034] S1. Initial status check: After the PLC system is started, the initial status check is first performed, including the status confirmation of various sensors, solenoid valves, motors and other equipment; the PLC system can immediately confirm the status of all related equipment after startup, which can prevent production interruptions caused by equipment failure or abnormal conditions and improve the stability and reliability of the system.

[0035] S2. C-hook in place and clamping: When the PF line moves the coil to the unloading station with the coil and sends a fault-free signal, the C-hook clamp fixes the coil; the automated execution of the C-hook clamp can reduce reliance on manual operation, improve work efficiency and safety, and 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.

[0036] S3. The unloading trolley 2 lifts the coil: the PLC sends out instructions to control the hydraulic solenoid valve of the unloading trolley 2 to lift the coil. The pallet of the unloading trolley 2 is lifted to lift the coil. With the help of the PLC, the work efficiency can be improved while ensuring the accuracy and stability of the pallet lifting. At the same time, 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 electric control room.

[0037] S4, the unloading trolley 2 moves to the storage rack of the transverse trolley 7: PLC decides whether the unloading trolley 2 moves to the far or near storage rack according to the state of the storage rack of the transverse trolley 7; adjusting the position of the unloading trolley 2 can make the whole device run efficiently, avoid overcrowding or idleness of the storage rack, and at the same time, improve the flexibility and adaptability of the device, wherein the transverse trolley 7 has 4 storage positions. When two positions are in the same straight line with the unloading trolley 2, they are used for loading, and the other two positions are used for crane unloading. When the transverse trolley 7 moves horizontally, the two positions are interchanged.

[0038] S5. The pallet of the coil unloading trolley 2 descends and the coil is stored: the PLC issues a command to control the hydraulic solenoid valve of the coil unloading trolley 2 to lower the pallet of the coil unloading trolley 2 and place the coil on the storage rack of the transverse moving 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 moving trolley 7, avoiding damage or misalignment of the coil.

[0039] S6. The coil unloading trolley 2 returns to the C-hook position: The PLC issues a command to control the coil unloading trolley 2 to return to the C-hook position to prepare for the next coil unloading. Under the action of the PLC, it can ensure that the coil unloading trolley can always remain in the correct position, providing convenience for subsequent coil unloading operations.

[0040] S7, lateral movement of the lateral moving trolley 7 and crane lifting: When the three positions on the lateral moving trolley 7 storage rack are all filled with coils and the crane unloading positions are all vacant, the PLC issues a command to control the hydraulic solenoid valve of the lateral moving trolley 7 to make the lateral moving trolley 7 move horizontally smoothly. The smooth horizontal movement of the lateral moving trolley ensures the safety and stability of the coils during movement.

[0041] refer to Figure 1 As shown, in S1, when confirming the status of each device, it is necessary to check whether there are fault signals in the PF line, the unloading trolley 2 and the transverse trolley 7. Checking the electrical signals of each device can ensure the normal operation of each device, thereby ensuring the smooth progress of the wire conveying and unloading work.

[0042] In S2, the PLC receives the fault-free signal of the PF line and the clamped signal of the C-hook, confirming that the coil is stably fixed on the C-hook. When the coil is fixed by the C-hook, it is convenient for the subsequent coil to be transported and unloaded.

[0043] In S3, after the pallet is lifted into position, it is confirmed by the upper proximity switch of the coil unloading trolley 2. In S4, when the coil unloading trolley 2 starts to move, the inverter receives the PLC signal and accelerates the coil unloading trolley 2 to a high speed level according to the set acceleration. Under the action of PLC, the coil unloading trolley 2 can work quickly, improving the efficiency of coil loading and unloading.

[0044] When the unloading trolley 2 moves to the deceleration point at the first position signal, the frequency converter decelerates from high speed to low speed according to the set deceleration rate. When the unloading trolley 2 moves to the stop point at the second position signal, the frequency converter stops running and the unloading trolley 2 decelerates and stops. The unloading trolley 2 is in motion to ensure its conveying efficiency. At the same time, under the action of PLC, the movement of the unloading trolley can maintain a high precision.

[0045] In S5, after the pallet is lowered into position, it is confirmed by the lower 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.

[0046] There are 4 proximity switches on each storage rack of the transverse moving trolley 7, which are used to generate deceleration and stop signals from the first to the second roll. The maximum speed of the unloading trolley 2 is 700mm / s, and the distance between the deceleration and stop sensing switches is 250mm.

[0047] In S5, when the coil unloading trolley 2 moves to the storage rack of the transverse trolley 7, the coil is placed on the storage rack, and the lifting action is controlled by the lifting action hydraulic solenoid valve of the coil unloading trolley 2. When the lifting solenoid valve is energized, the tray of the coil unloading trolley 2 rises; when the lowering solenoid valve is energized, the tray of the coil unloading trolley 2 falls. The lifting position and the lowering position are indicated by the upper proximity switch of the coil unloading trolley 2 and the lower proximity switch of the coil unloading trolley 2 respectively. Under the action of the solenoid valve and the PLC, the stability of the coil unloading trolley 2 can be further guaranteed when it is working.

[0048] In S7, after the transverse trolley 7 reaches the designated position, it is confirmed by the position indicating proximity switch. After the crane lifts the coil from the transverse trolley 7, the photoelectric switch sends a coil departure signal. When the device is working normally, the unloading trolley 2 can move to the transverse trolley 7 only when the transverse trolley 7 stops at one of the two positions, the storage position is empty, and the pallet of the unloading trolley 2 is upgraded. At the same time, the transverse trolley 7 can move to the transverse direction only when the unloading trolley 2 stops at the C-hook position. At the same time, the PF line transport system C-hook can enter the unloading station only when the unloading trolley 2 pallet is lowered and the C-hook is allowed to enter. At the same time, the PF line transport system C-hook can leave the unloading position only when the unloading trolley 2 completes its work. At the same time, the unloading trolley can move to the C-hook position only when the pallet of the unloading trolley 2 is lowered.

[0049] refer to Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the present invention also provides a wire conveying and unloading device, including a buffer 1 and an unloading trolley 2, and also includes:

[0050] A steel rail 3 arranged at the bottom of the coil unloading trolley 2;

[0051] A pad 4 is arranged at the bottom of the rail 3, a drag chain 5 is arranged on one side of the pad 4, a drag chain fixing plate 13 is arranged at the bottom of the drag chain 5, a nut 10 is arranged on the top of the drag chain 5, washers 11 and a pressure plate 12 are respectively arranged on the outside of the nut 10, a rail supporting column 6 is arranged on one side of the rail supporting column 6, a transverse trolley 7 is arranged on one side of the rail supporting column 6, a bottom beam 9 is arranged at the bottom of the transverse trolley 7, and a clamping plate 8 is arranged on one side of the bottom beam 9.

[0052] Working principle: When the staff needs to transport and load and unload the wire through this device, the PF line first moves the coil to the unloading station. When the PF line sends a fault-free signal, and the C-hook has clamped the coil and the no-coil signal is normal, the PLC system will control the lifting and lowering action of the unloading trolley 2. The hydraulic solenoid valve makes the tray of the unloading trolley 2 rise and hold up the coil. The PLC system will adjust the moving direction of the unloading trolley 2 according to the state of the storage rack of the transverse trolley 7. When the storage rack at the far end is idle, the unloading trolley 2 will move to the far end; conversely, During the movement, the PLC system will control the speed and acceleration of the unloading trolley 2 through the frequency converter to ensure a smooth and efficient movement. When the unloading trolley 2 reaches the specified position, the PLC system will control it to decelerate and stop. After the unloading trolley 2 reaches the specified position, the PLC system will again control the lifting and lowering action of the unloading trolley 2. The hydraulic solenoid valve makes the pallet drop and put the coil on the storage rack of the transverse moving trolley 7. After the pallet drops into place, the PLC system will confirm and send a signal, and then the PLC system will control the unloading trolley 2 to move. The coil trolley 2 returns to the C-hook position to prepare for the next coil unloading operation. When the three positions on the storage rack of the transverse trolley 7 are full of coils and the unloading positions of the crane are vacant, the PLC system will control the transverse trolley 7 to move smoothly horizontally to move the coil to the position where the crane can lift it. At the same time, this device also has interlocking and protection functions. Only when the transverse trolley 7 stops at the specified position and the storage position is empty, the unloading trolley 2 can move to the transverse trolley 7. At the same time, when the unloading trolley 2 stops at the C-hook position, the transverse trolley 7 can move; only when the unloading trolley 2 stops at the C-hook position, the transverse trolley 7 can move. When the pallet of vehicle 2 is lowered and the C-hook is allowed to enter, the C-hook of the PF line transportation system can 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 has its own alarm, monitoring and protection functions. A card chain floating protection switch is set at the drive station. At the tensioning device, there are over-tightening and over-loosening detection switches, pneumatic electric contact pressure, and air supply pressure range detection. When the limit is exceeded, the alarm will stop. At the same time, the PLC is set with an equipment fault code, which digitally indicates the fault point and the nature of the fault.

[0053] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0054] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention 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 following steps are involved: S1. Initial status check: After the PLC system is started, the initial status check is first performed, including the status confirmation of various sensors, solenoid valves, motors and other equipment; S2, C-type hook in place and clamping: When the PF line moves the coil to the unloading station with the coil and sends a no-fault signal, the C-type hook clamp fixes the coil; S3, the coil unloading trolley (2) lifts the coil: the PLC issues a command to control the hydraulic solenoid valve of the coil unloading trolley (2) to lift the coil, so that the tray of the coil unloading trolley (2) rises and lifts the coil; 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 near-end storage rack according to the state of the storage rack of the transverse trolley (7); S5, the tray of the coil unloading trolley (2) descends and the coil is stored: the PLC issues a command to control the hydraulic solenoid valve of the coil unloading trolley (2) to lower the tray of the coil unloading trolley (2) and place the coil on the storage rack of the transverse trolley (7); S6, the 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 to prepare for the next unloading; S7, transverse movement of the transverse moving trolley (7) and lifting by crane: When the three positions on the storage rack of the transverse moving trolley (7) are all filled with coils and the positions for unloading coils by the crane are all vacant, the PLC sends out a command to control the hydraulic solenoid valve of the transverse moving trolley (7) so that the transverse moving trolley (7) moves smoothly transversely.

2. The control method of the wire conveying and unwinding device according to claim 1, characterized in that: In said 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 moving trolley (7).

3. The control method of the 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 clamped signal of the C-hook, and confirms that the coil is stably fixed on the C-hook.

4. The control method of the wire conveying and unwinding device according to claim 1, characterized in that: In the above S3, after the tray is raised to its position, it is confirmed by the upper proximity switch of the unloading trolley (2). In the above 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. A 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 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 (2) moves to the stop point at the second position signal, the frequency converter stops running and the unloading trolley (2) decelerates and stops.

6. The control method of the wire conveying and unwinding device according to claim 1, characterized in that: In said S5, after the pallet is lowered into position, it is confirmed by the lower proximity switch of the unloading trolley (2). In said 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 of the wire conveying and unwinding device according to claim 1, characterized in that: Each storage rack of the transverse shift trolley (7) is provided with four proximity switches, which are used to generate deceleration and stop signals from the first to the second roll respectively. 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.

8. The control method of the wire conveying and unwinding device according to claim 1, characterized in that: In S5, when the coil unloading trolley (2) moves to the storage rack of the transverse trolley (7), the coil is placed on the storage rack, and the lifting action is controlled by the lifting action hydraulic solenoid valve of the coil unloading trolley (2). When the lifting solenoid valve is energized, the tray of the coil unloading trolley (2) rises; When the descending solenoid valve is energized, the tray of the unloading trolley (2) descends, and the lifting position and 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 of the 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 indicating proximity switch, and after the crane lifts the coil from the traverse trolley (7), the photoelectric switch sends a coil leaving signal.

10. A wire conveying and unwinding device according to any one of claims 1 to 9, comprising a buffer (1) and an unwinding trolley (2), characterized in that: Also includes: A steel rail (3) arranged at the bottom of the coil unloading trolley (2); A pad (4) is arranged at the bottom of the rail (3), a drag chain (5) is arranged on one side of the pad (4), a drag chain fixing plate (13) is arranged at the bottom of the drag chain (5), a nut (10) is arranged at the top of the drag chain (5), a washer (11) and a pressure plate (12) are arranged on the outer side of the nut (10), a rail support column (6) is arranged on one side of the rail support column (6), a transverse trolley (7) is arranged on one side of the transverse trolley (7), a bottom beam (9) is arranged at the bottom of the transverse trolley (7), and a clamping plate (8) is arranged on one side of the bottom beam (9).

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