Pipe mill system unwinder adjustable baffle arm device

Abstract

The present application relates to the technical field of decoiler, a kind of adjustable blocking arm device of welded pipe system decoiler, including base and fixed hole, the inner wall of the base is processed with fixed hole, the inner wall of the base is connected with support frame by bolt and screw thread, the outer wall of the support frame is fixedly connected with connecting column, the outer wall of the connecting column is inserted with steel coil body, the outer wall of the support frame is connected with adjusting mechanism. By controlling panel electric control electric telescopic rod, connecting seat, traction rod linkage cylinder, drive rotary support to lift and place blocking arm, lifting arm does not interfere with hoisting during feeding, and blocking arm can rotate around fixed shaft to adapt to end face, limit block is matched to limit overturning, which greatly reduces friction loss, and the whole linkage has good synchronism, automatic limiting eliminates axial movement and steel coil falling hazard, reduces equipment wear and production safety risk.

Description

Technical Field

[0001] This invention relates to the technical field of uncoilers, specifically to an adjustable stop arm device for an uncoiler of a welded pipe system. Background Technology

[0002] Uncoilers are core equipment at the front end of cold rolling, stamping, and sheet metal production lines. They are used to support steel coils and continuously release strip steel. During the rotation and uncoiling process, steel coils are prone to axial movement and deviation, which can lead to tearing of the strip steel edges and deviations in subsequent processing dimensions. Therefore, stop arms are needed to limit the movement of the steel coils on both sides.

[0003] For example, the baffle arm device for a strip uncoiler with authorization announcement number "CN221361962U" solves the problem of long maintenance time of existing baffle arm devices for strip uncoilers. However, this device lacks overload protection and position limit components. When the hydraulic cylinder thrust is out of control, the baffle arm may excessively press the strip, posing a safety hazard of coil springing open and mechanism deformation. Wear-induced gap deviations can also exacerbate production vibration, significantly increasing equipment failure and safety accidents. Furthermore, the common problem of strip spool tensioning in uncoilers causing strip spool detachment due to hydraulic pressure relief or the inner diameter of the strip spool poses a significant safety hazard. Overall, the device is prone to wear and production safety risks. Summary of the Invention

[0004] The purpose of this invention is to solve the problem of wear and tear and production safety risks associated with existing strip steel uncoiler arm devices, and to propose an adjustable stop arm device for welded pipe system uncoilers.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an adjustable stop arm device for a welded pipe system uncoiler, comprising a base and a fixing hole, wherein the fixing hole is machined on the inner wall of the base, the inner wall of the base is threadedly connected to a support frame by bolts, the outer wall of the support frame is fixedly connected to a connecting column, the outer wall of the connecting column is inserted into the steel coil body, and an adjustment mechanism is connected to the outer wall of the support frame.

[0006] This configuration: The base is locked and fixed to the uncoiler frame through the fixing holes. The support frame provides an installation carrier for the entire set of stop arm assembly. The connecting column is used to position the steel coil body and limit the center position of the steel coil. The adjustment mechanism serves as a power linkage unit to drive the stop arm mechanism to swing synchronously, thereby realizing automatic adjustment of the limit width on both sides of the steel coil.

[0007] Preferably, the adjusting mechanism includes a fixed seat, the inner wall of which is threadedly connected to the support frame by bolts, the inner wall of which is rotatably connected to the connecting seat, the upper end of which is fixedly connected to the connecting member, the inner wall of which is rotatably connected to the electric telescopic rod, and the output end of which is rotatably connected to the connecting seat.

[0008] This feature: The fixed seat is locked onto the support frame to provide support for the rotating parts. The electric telescopic rod extends and retracts the connecting piece, driving the connecting seat to rotate and output power. The rotating connection structure at both ends eliminates motion jamming stress, ensuring smooth power transmission and providing stable driving force for the arm swing.

[0009] Preferably, the outer wall of the fixed base is fixedly connected to the cylinder, and the outer wall of the cylinder is connected to a stop arm mechanism.

[0010] This setting: The cylinder serves as the rotation fulcrum of the stop arm mechanism, transmitting the rotational power output by the adjustment mechanism to the stop arm mechanism, thereby achieving synchronous swinging of the stop arm and fitting and limiting the side of the steel coil.

[0011] Preferably, the stop arm mechanism includes a rotating support, the inner wall of which is rotatably connected to a cylinder, the inner wall of which is fixedly connected to a fixed sleeve, the lower end of which is fixedly connected to a fixed shaft, the outer wall of which is rotatably connected to the stop arm, and the inner wall of which is threadedly connected to a limit block by bolts.

[0012] This setting: The rotating support rotates synchronously around the cylinder, causing the fixed sleeve and fixed shaft to swing as a whole; the stop arm can rotate slightly around the fixed shaft to adapt to the end face of the steel coil, and the limit block restricts the rotation range of the stop arm to prevent the stop arm from overturning and detaching from the steel coil, ensuring the limit and fit effect.

[0013] Preferably, the outer wall of the cylinder is fixedly connected to the traction rod.

[0014] This setting: The traction rod rotates synchronously with the cylinder, serving as an intermediate rod for power transmission, and synchronously transmits the rotational motion of the connecting seat to the cylinder, thereby realizing the linkage between the adjustment mechanism and the stop arm mechanism.

[0015] Preferably, the end of the traction rod is fixedly connected to the connecting seat.

[0016] This setting allows the connecting seat to rotate, directly pulling the traction rod. The traction rod drives the cylinder to rotate synchronously, ensuring that the swing angle of the stop arm is completely consistent, resulting in high synchronization and preventing one-sided compression of the steel coil.

[0017] Preferably, the outer wall of the stop arm is movably connected to the outer side of the steel coil body.

[0018] This setting: The stop arm fits against the end face of the steel coil, preventing the steel coil from moving axially and deviating during the uncoiling process. It is suitable for steel coils of different widths and can stably limit the movement of both sides of the steel coil after adjustment.

[0019] Preferably, a control panel is installed on the outer wall of the base, and the output end of the control panel is electrically connected to the electric telescopic rod.

[0020] This setting allows operators to input width adjustment commands via the control panel, and the electrical control signal controls the extension and retraction of the electric telescopic rod, achieving automatic opening and closing adjustment of the stop arm without manual operation. It offers high adjustment accuracy and speed, and can be linked with the entire processing production line for control.

[0021] This setting: The present invention proposes an adjustable stop arm device for a welded pipe system uncoiler, which has the following advantages: the electric telescopic rod is controlled by the control panel, and the connecting seat and traction rod are linked to the cylinder to drive the rotating support to raise and lower the stop arm. When loading, the raising of the arm does not interfere with the hoisting, and when processing, the lowering of the arm limits the steel coil. The stop arm can rotate slightly around the fixed axis to adapt to the end face. With the help of the limit block to limit the flipping, the friction loss is greatly reduced. The whole set has good linkage and synchronization. The automatic limit eliminates the hidden dangers of axial movement and steel coil falling off, reducing equipment wear and production safety risks. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 for Figure 1 Schematic diagram of the middle connector structure; Figure 3 for Figure 2 Schematic diagram of the middle connector structure; Figure 4 for Figure 2 Schematic diagram of the middle fixed base and connecting parts; Figure 5 for Figure 1 Schematic diagram of the middle stop arm mechanism; Figure 6 for Figure 1 Schematic diagram of the central support frame and connecting column structure; Figure 7 for Figure 1 Enlarged structural diagram of the central base.

[0023] In the diagram: 1. Base, 2. Fixing hole, 3. Support frame, 4. Connecting column, 5. Steel coil body, 6. Adjustment mechanism, 601. Fixing seat, 603. Connecting seat, 604. Connecting piece, 605. Electric telescopic rod, 7. Cylinder, 8. Stop arm mechanism, 801. Rotary support, 802. Fixing sleeve, 803. Fixing shaft, 804. Stop arm, 805. Limit block, 9. Traction rod, 10. Control panel. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings: Please see Figure 1-6In this embodiment, an adjustable stop arm device for a welded pipe system uncoiler includes a base 1 and fixing holes 2. The fixing holes 2 are machined on the inner wall of the base 1. The inner wall of the base 1 is threadedly connected to a support frame 3 by bolts. The outer wall of the support frame 3 is fixedly connected to a connecting column 4. The outer wall of the connecting column 4 is inserted into the steel coil body 5. An adjustment mechanism 6 is connected to the outer wall of the support frame 3. The base is integrally cast from thickened cast steel with an overall thickness of 25mm. Four sets of elongated fixing holes are evenly arranged at the four corners, with a 30mm adjustment margin reserved in the length of the fixing holes to adapt to the installation reference of different models of uncoiler frames. The cast steel material can withstand the impact load of the steel coil and the alternating stress caused by long-term start-stop vibration, avoiding warping and deformation of the thin plate base after long-term use. This ensures the long-term stability of the installation reference of the entire device and prevents the stop arm from shifting or the wear and tear on one side from being aggravated due to base deformation.

[0025] The adjusting mechanism 6 includes a fixed seat 601. The inner wall of the fixed seat 601 is threadedly connected to the support frame 3 by bolts. The inner wall of the fixed seat 601 is rotatably connected to the connecting seat 603. The connecting seat 603 rotates around the fixed seat to output rotational power. The upper end of the connecting seat 603 is fixedly connected to the connecting piece 604. The inner wall of the connecting piece 604 is rotatably connected to the electric telescopic rod 605. The output end of the electric telescopic rod 605 is rotatably connected to the connecting seat 603. The fixed seat adopts a split flange structure. The upper and lower flanges are locked and clamped to the side wall of the support frame by high-strength internal hexagon bolts. The flatness tolerance of the flange contact surface is controlled within 0.02mm. A wear-resistant copper sleeve is installed on the inner side of the flange. The inner wall of the copper sleeve is coated with high-temperature grease to reduce the frictional resistance when the connecting seat reciprocates and prevents dry friction and jamming. The electric telescopic rod uses a servo DC electric actuator with a built-in displacement sensor. The telescopic stroke is 0-180mm, and the control accuracy can reach 0.1mm. Both ends of the actuator are equipped with fisheye hinge joints, which completely eliminates the radial torque generated during the telescopic rod's extension and retraction, avoiding bending deformation of the rod. Compared with the traditional hydraulic cylinder drive structure, it does not require external hydraulic oil pipes or hydraulic stations, and there is no risk of oil leakage contaminating the surface of the strip steel. It is suitable for cold-rolled thin plate production lines with high surface requirements.

[0026] The control panel 10 is equipped with an electrically controlled telescopic rod 605, a connecting seat 603, a traction rod 9, and a linkage cylinder 7, which drives the rotating support 801 to raise and lower the stop arm 804. When loading materials, the arm is raised without interfering with hoisting. During processing, the arm is lowered to limit the steel coil 5. The stop arm 804 can rotate slightly around the fixed axis 803 to adapt to the end face. With the limit block 805, it restricts the flipping, greatly reducing friction loss. The whole set has good linkage and synchronization. The automatic limit eliminates the risk of axial movement and steel coil falling off, reducing equipment wear and production safety risks.

[0027] The control panel is embedded in the protective shell on the side of the base. The protective shell has a transparent acrylic observation window and a waterproof and dustproof rubber sealing ring on the outside, making it suitable for workshops with high dust and coolant splashing conditions. The panel integrates four physical buttons for raising, lowering, automatic, and emergency stop, and a digital display screen to show the extension length of the telescopic rod in real time. Operators can store multiple sets of adjustment parameters in advance according to the width of the steel coil. When switching to different specifications of steel coils, the preset stroke can be retrieved with one click, eliminating the need for repeated fine-tuning on site and greatly shortening the material change and debugging time. The panel has reserved signal wiring terminals, which can be connected to the production line PLC control system to realize the interlocking actions of uncoiler tensioning, stop arm closing, and uncoiling start, forming a fully automatic closed-loop operation process.

[0028] The outer wall of the fixed base 601 is fixedly connected to the cylinder 7. The outer wall of the cylinder 7 is connected to the stop arm mechanism 8. The stop arm mechanism 8 includes a rotating support 801. The inner wall of the rotating support 801 is rotatably connected to the cylinder 7. The inner wall of the rotating support 801 is fixedly connected to the fixed sleeve 802. The lower end of the fixed sleeve 802 is fixedly connected to the fixed shaft 803. The fixed shaft 803 provides a rotation fulcrum for the stop arm 804, ensuring that the stop arm can swing slightly around its own axis. The outer wall of the fixed shaft 803 is rotatably connected to the stop arm 804. The inner wall of the fixed shaft 803 is threadedly connected to the limit block 805 by bolts.

[0029] The cylinder is made of No. 45 quenched and tempered solid round steel, and the surface is quenched and polished to achieve a surface hardness of HRC40 or higher. The rotating support and the cylinder are fitted with a double-row self-aligning roller bearing. Dustproof rings are installed on both sides of the bearing to prevent rolling dust and emulsion from entering the bearing and extend the bearing service life by more than 3 times. The fixed sleeve and the rotating support are fitted with an interference fit. After the pressing is completed, the four sides are welded and reinforced to prevent the sleeve from loosening or shifting due to long-term reciprocating swing.

[0030] The fixed shaft and the stop arm are fitted with needle roller bearings, allowing the stop arm to rotate freely within ±12°. When there is slight warping or uneven thickness at the end face of the steel coil, the stop arm can automatically conform to the end face of the coil, preventing single-point hard extrusion that could scratch the side of the strip. The limiting block adopts a stepped limiting structure, which conforms to the side wall of the stop arm after the bolts are tightened, strictly limiting the maximum rotation angle of the stop arm and preventing it from flipping outward and detaching from the steel coil. At the same time, it avoids excessive inward extrusion that could cause indentation defects on the edge of the coil.

[0031] The outer wall of cylinder 7 is fixedly connected to the traction rod 9. The traction rod 9 transmits the rotational power output from the connecting seat to cylinder 7, ensuring stable power transmission. The end of the traction rod 9 is fixedly connected to the connecting seat 603. The outer wall of the stop arm 804 is movably connected to the outer side of the steel coil body 5. The outer wall of the base 1 is equipped with a control panel 10, and the output end of the control panel 10 is electrically connected to the electric telescopic rod 605. The traction rod is made of a rectangular hollow steel tube bent into shape. The steel tube has a wall thickness of 8mm, and flange connecting plates are machined at both ends. The flange plates have multiple sets of mounting holes, which can finely adjust the effective length of the traction rod to adapt to the swing stroke of the stop arm of steel coils with different width ranges.

[0032] Buffer rubber washers are installed at the connection points of the traction rod, connecting seat, and cylindrical section to buffer the impact load during the start and stop of the electric telescopic rod, reduce transmission vibration, and prevent long-term impact from causing loose connecting bolts and cracking of component welds. A polyurethane wear-resistant buffer pad is bonded to the outer side of the stop arm that is in contact with the steel coil. The polyurethane material is soft and, compared to direct metal contact, can completely prevent the steel coil end face from being bumped or scratched. The buffer pad can be removed and replaced with countersunk screws. When worn, only the pad layer needs to be replaced, without the need to replace the entire stop arm, thus reducing the cost of later maintenance parts.

[0033] Working principle Assembly process The entire machine is locked to the uncoiling frame using the fixing holes 2 of the base 1. The support frame 3 is fixed to the base 1 with bolts. The connecting column 4 is welded to the outside of the support frame 3 for passing through the steel coil body 5. The adjustment mechanism 6 is assembled, and the fixed seat 601 is locked to the support frame 3. The rotatable connecting seat 603, the connecting piece 604 and the electric telescopic rod 605 are assembled in sequence. The two ends of the traction rod 9 are respectively connected to the connecting seat 603 and the cylinder 7 to realize power linkage. The stop arm mechanism 8 is installed on the outside of the cylinder 7. The rotating support 801 is sleeved on the outside of the cylinder 7. The internal fixed sleeve 802 and the fixed shaft 803 are fixed. The rotatable stop arm 804 is assembled on the outside of the fixed shaft 803. The end is screwed into the limit block 805 to limit the rotation range. The stop arm 804 has a built-in bearing to reduce friction loss. Finally, the control panel 10 is installed on the outside of the base, and the wiring is connected to the electric telescopic rod 605 to complete the assembly.

[0034] The assembly of the whole machine is divided into four major processes: base pre-assembly, transmission mechanism assembly, arm actuator assembly, and electrical control wiring. Each process has a set assembly tolerance verification standard. In the base pre-assembly stage, a level is used to calibrate the base mounting plane to ensure that the base levelness error is no more than 0.5mm / m, preventing the whole machine from tilting and causing the arm to be subjected to force on one side. The bolts connecting the support frame and the base use anti-loosening spring washers with thread fastening adhesive, so that the bolts will not loosen on their own under high temperature and continuous vibration conditions. The connecting column and the support frame adopt a full welding process with a weld thickness of no less than 6mm. After welding, the weld is ground and anti-rust primer is sprayed to prevent the workshop coolant from corroding the weld and causing rust and cracking.

[0035] During the assembly of the transmission mechanism, manually push and pull the electric telescopic rod five times to check that the connecting seat, traction rod, and cylindrical transmission are smooth and free from jamming or interference. If friction or collision occurs between the rods, fine-tune the mounting hole position of the traction rod flange to eliminate interference. After the arm stop mechanism is assembled, manually move the arm stop to verify that the ±12° deflection range is smooth and free from jamming. After the limit block is locked, the arm stop cannot rotate beyond the range. The electrical control wiring process distinguishes between power lines and signal lines. The two types of lines are laid in separate slots, and corrugated protective sleeves are installed on the outside to prevent the metal cables from being damaged and short-circuited due to long-term friction. After the wiring is completed, power on and run under no-load test. Test that all functions of rising, falling, and emergency stop respond normally, with no signal delay or push rod malfunction. Only after the no-load test is qualified can it be installed and used on the machine.

[0036] On-site usage process Before hoisting the steel coil, the operator controls the electric telescopic rod 605 to retract via the control panel 10, pulls the traction rod 9 to drive the cylinder 7 and rotating support 801 to raise the stop arm 804, leaving space for loading. The steel coil body 5 is then fitted onto the connecting column 4 and tensioned. The operator then controls the control panel 10 to extend the electric telescopic rod 605, and the traction rod 9 drives the stop arm mechanism 8 to fall as a whole. The stop arm 804 fits against the outer end face of the steel coil. During uncoiling, the strip steel is continuously released, and the internal bearing of the stop arm 804 rotates slightly with the steel coil, avoiding hard friction that could cause component wear. This effectively prevents axial movement of the steel coil and eliminates the risk of the steel coil falling off due to hydraulic pressure relief or inner diameter deviation. When changing the steel coil specification, the stop arm can be raised with a single button via the electric control, without the need for manual disassembly and adjustment, reducing downtime for maintenance and ensuring both production safety and equipment lifespan. The entire device operates smoothly and is easy to adjust, making it suitable for continuous uncoiling operations on cold rolling and welded pipe production lines.

[0037] During the steel coil hoisting and loading process, the maximum lifting height of the boom can reach 160mm. The hoisting crane's coil lifting gear and wire rope can completely pass through the gap between the boom and the connecting column, preventing the lifting gear from scraping or impacting the boom mechanism and eliminating boom deformation and transmission component misalignment caused by hoisting collisions. After the steel coil is sleeved onto the connecting column, the uncoiler tensioning bearing expands outward to fix the inner hole of the steel coil. For steel coils with tolerances in the inner diameter or slight deformation of the inner hole, the boom relies on the servo telescopic rod to accurately output support force. Both booms on both sides synchronously fit the two ends of the steel coil, evenly distributing the axial thrust, preventing the limitation failure of one side being pressed and the other side being suspended. During continuous uncoiling production, the strip steel is continuously conveyed at high speed, and the steel coil itself will have a slight axial offset tendency. The boom relies on the polyurethane buffer pad to continuously fit the end face of the coil, and the bearings adaptively rotate slightly to offset the local pressure caused by the unevenness of the end face of the steel coil, preventing the harsh noise caused by metal-to-metal friction, and avoiding the long-term compression of the strip edge, which can lead to curling, tearing, and scrapping.

[0038] If the production line suddenly stops or the uncoiling tensioning system experiences a pressure relief failure, the two side arms will continuously maintain their limit support state, firmly locking the axial position of the steel coil and completely preventing major safety accidents caused by the steel coil sliding off the connecting column and injuring equipment or operators. When the production plan switches to different widths of steel coils, the operator only needs to retrieve the corresponding preset program for the steel coil width on the control panel, and the electric telescopic rod will automatically retract and raise the arm. There is no need to manually disassemble the arm or add or remove shims to manually adjust the limit distance. The single material change and debugging time is reduced from 15 minutes for traditional mechanical arm to less than 30 seconds, greatly improving the effective working time of the production line.

[0039] After long-term continuous production, only periodic lubrication of cylindrical bearings and retaining arm needle roller bearings is required, and worn polyurethane buffer pads need to be replaced. There is no need to disassemble the entire transmission mechanism. Daily maintenance is simple and time-saving.

[0040] The entire set of equipment can be adapted to various steel coils ranging from 0.3mm thin plate to 12mm thick plate, covering multiple metal processing production lines such as cold rolling, hot-dip galvanizing, welded pipe, and stamping. It has strong environmental adaptability and can stably reduce equipment wear, coil scrap rate, and on-site safety hazards during long-term operation.

[0041] 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 alterations 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. An adjustable stop arm device for a welded pipe system uncoiler, comprising a base (1) and a fixing hole (2), wherein the fixing hole (2) is machined on the inner wall of the base (1), characterized in that: The inner wall of the base (1) is threadedly connected to the support frame (3) by bolts. The outer wall of the support frame (3) is fixedly connected to the connecting column (4). The outer wall of the connecting column (4) is inserted into the steel coil body (5). The outer wall of the support frame (3) is connected to an adjustment mechanism (6).

2. The adjustable stop arm device for an uncoiling machine of a welded pipe system according to claim 1, characterized in that: The adjustment mechanism (6) includes a fixed seat (601), the inner wall of which is threadedly connected to the support frame (3) by bolts, the inner wall of which is rotatably connected to the connecting seat (603), the upper end of which is fixedly connected to the connecting piece (604), the inner wall of which is rotatably connected to the electric telescopic rod (605), and the output end of which is rotatably connected to the connecting seat (603).

3. The adjustable stop arm device for an uncoiling machine of a welded pipe system according to claim 2, characterized in that: The outer wall of the fixed base (601) is fixedly connected to the cylinder (7), and the outer wall of the cylinder (7) is connected to the stop arm mechanism (8).

4. The adjustable stop arm device for an uncoiler of a welded pipe system according to claim 3, characterized in that: The stop arm mechanism (8) includes a rotating support (801), the inner wall of which is rotatably connected to a cylinder (7), the inner wall of which is fixedly connected to a fixed sleeve (802), the lower end of which is fixedly connected to a fixed shaft (803), the outer wall of which is rotatably connected to a stop arm (804), and the inner wall of which is threadedly connected to a limit block (805) by bolts.

5. The adjustable stop arm device for an uncoiling machine of a welded pipe system according to claim 3, characterized in that: The outer wall of the cylinder (7) is fixedly connected to the traction rod (9).

6. The adjustable stop arm device for an uncoiler of a welded pipe system according to claim 5, characterized in that: The end of the traction rod (9) is fixedly connected to the connecting seat (603).

7. The adjustable stop arm device for an uncoiling machine of a welded pipe system according to claim 4, characterized in that: The outer wall of the stop arm (804) is movably connected to the outer side of the steel coil body (5).

8. The adjustable stop arm device for an uncoiling machine of a welded pipe system according to claim 1, characterized in that: The outer wall of the base (1) is equipped with a control panel (10), and the output end of the control panel (10) is electrically connected to the electric telescopic rod (605).

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