A system for early warning of chain damage

Abstract

The application discloses a system for early warning of chain damage, and belongs to the technical field of metallurgical wide plate finishing conveying equipment. The system comprises a chain, a guide plate, a transmission device, a pull rope switch and a steel wire rope. First and second clamping plates on the outer sides of first and second guide plates extend downward, and the bottoms are locked by positioning cylinders and bolts. The steel wire rope is horizontally hung below the guide plate in a taut state, and a chain falling triggering gap of about 60 mm is formed; meanwhile, the positioning cylinder moves downward to a position 200 mm away from the lower edge of the guide plate to form an avoiding space. The self weight and kinetic energy of the chain when accidentally falling are utilized to passively trigger the steel wire rope, the pull rope switch is pulled to realize hard interruption of the transmission system, and the avoiding space avoids the positioning cylinder from being pulled off at the moment of chain falling, so that the pain point that a large area of guide rails is torn due to chain falling in a blind area is solved, and the maintenance time is obviously reduced.

Description

Technical Field

[0001] This invention relates to the field of metallurgical heavy plate finishing conveying equipment, and in particular to a system for early warning of chain damage. Background Technology

[0002] In heavy plate finishing lines, grinding tables typically use chain drives to move finished steel plates laterally across delivery points. The chain on the roller conveyor surface is slightly higher than the roller conveyor, and the driving force comes from the transmission device below the chain, forming a closed chain circulation system through the steering wheels at both ends.

[0003] The system features extremely long chain travel distances, for example, 280m, with a 140-meter-long chain suspended between two guide plates beneath the grinding platform. These guide plates are bolted to a fixed beam by columns, creating a blind spot where routine visual inspections are impossible.

[0004] The original chain guide design has the following serious cascading failure defects: Typically, two to three clamping plates are installed below a pair of guide plates. The lower part of the clamping plates is secured by positioning cylinders and bolts to constrain the opening distance between the two guide plates, ensuring that the chain wheel travels precisely along the edge of the guide plate. However, the original clamping bolts are very close to the lower edge of the guide plate, about 100mm away. If the guide plate deviates even slightly or the chain plate is damaged and falls off, the falling chain will catch on the tightly fitted positioning cylinders and clamping bolts below and break, causing the entire chain to lose support and fall.

[0005] Once the entire chain falls outside the guide plate, it's in a blind spot, making it impossible for operators to detect the defect visually. The transmission system continues to provide enormous traction, and the fallen chain, like a zipper, will damage all the guide plates along its path, potentially even trapping guide plate fragments in the drive pulley and causing it to jam. This catastrophic damage requires extremely long downtime for repairs, resulting in huge economic losses.

[0006] In conclusion, there is an urgent need for a system that provides early warning of chain damage to address the aforementioned technical problems. Summary of the Invention

[0007] In view of this, this application provides a system for early warning of chain damage. The main objective is to address the technical problem of existing long-distance chains falling into blind spots and not being detected in time, leading to the escalation of interlocking accidents. Another objective is to address the problem of existing guide plate clamping structures being easily damaged by falling chains by providing a downward-extending clamping guide structure with anti-pull and avoidance space, thereby improving the fault tolerance of the guide system under extreme operating conditions.

[0008] According to the present invention, a system for early warning of chain damage is provided, comprising a chain, a guide plate for supporting and limiting the operation of the chain, and a transmission device for providing power to the chain; and further comprising an early warning interruption mechanism; The early warning interruption mechanism includes a pull-rope switch and a steel wire rope mechanically connected to the pull-rope switch; The steel wire rope is taut and horizontally suspended directly below the guide plate, and a preset chain trigger gap is formed between the steel wire rope and the lower edge of the guide plate; the signal output terminal of the pull rope switch is electrically connected to the control circuit of the transmission device.

[0009] Furthermore, the preset vertical distance range of the chain trigger gap is 50mm to 70mm.

[0010] Furthermore, the system for early warning of chain damage also includes clamps, positioning cylinders, and bolts; The guide plate includes a pair of parallel first guide plates and second guide plates; The clamping plate includes a first clamping plate and a second clamping plate, which are respectively fixed to the outside of the first guide plate and the second guide plate. Both the first clamping plate and the second clamping plate extend downward beyond the lower edge of the guide plate.

[0011] Furthermore, the positioning cylinder is laterally clamped between the lower parts of the first clamping plate and the second clamping plate, and the bolt passes through the first clamping plate, the positioning cylinder and the second clamping plate to lock the opening distance between the first guide plate and the second guide plate.

[0012] Furthermore, the vertical distance between the central axis of the positioning cylinder and the lower edge of the guide plate is greater than or equal to 200mm; The first clamp, the second clamp, and the positioning cylinder form a physical clearance space for the chain to pass through when it falls.

[0013] Furthermore, the wire rope is arranged parallel to the running direction of the chain, and the system also includes a fixed end, one end of the wire rope is fixed to the fixed end, and the other end is flexibly connected to the actuating contact of the pull rope switch.

[0014] Furthermore, a fixed end is provided at the center of the chain conveying section, and two pull rope switches are symmetrically provided at both ends of the chain conveying section. The two steel wire ropes extend in the opposite direction from the fixed end in the middle to the pull rope switches on both sides.

[0015] Furthermore, when the chain derails and falls, and its falling amplitude exceeds the chain trigger gap, the chain physically presses down on the wire rope, forcing the pull rope switch to generate mechanical displacement and cutting off the power supply to the drive motor of the transmission device.

[0016] Furthermore, the pull rope switch has an action trigger threshold, and the deformation displacement corresponding to the action trigger threshold is less than the elastic breaking limit length of the wire rope.

[0017] Furthermore, the outer walls of the first clamping plate and the first guide plate, and the outer walls of the second clamping plate and the second guide plate are fixed by welding or integrally formed, and multiple first clamping plates and second clamping plates are distributed at intervals along the length direction.

[0018] Beneficial Effects: This invention provides a system for early warning of chain damage. Through a suspended steel wire rope and pull-rope switch, it triggers passive physical interference between the falling chain and the monitoring network. When the chain abnormally falls, it inevitably crosses a normal vibration gap of approximately 60mm. Its own weight and kinetic energy will pull the steel wire rope, triggering a shutdown interlock. This overcomes the shortcomings of blind spot manual inspection, enabling emergency stopping of the equipment within the range of damage to only one pair of guide plates, thus avoiding the complete tearing of the 100-meter guide rail.

[0019] In addition, the first clamping plate, the second clamping plate, and the positioning cylinder extending down to 200mm trigger the fasteners to exit the first interference trajectory of the falling chain, thereby overcoming the pain point that the original 100mm spacing is easily hooked and torn by the chain plate, providing a margin of safety at the moment of slight chain drop, preventing the guide plate from being pulled down instantly, and greatly saving the time of subsequent maintenance.

[0020] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0021] The accompanying drawings, as part of this invention, are provided to further illustrate the invention. The illustrative embodiments and descriptions of the invention are used to explain the invention, but do not constitute an undue limitation thereof. Clearly, the drawings described below are merely some embodiments, and those skilled in the art can obtain other drawings based on these drawings without any creative effort.

[0022] In the attached diagram: Figure 1 This diagram illustrates the overall structure of a system for early warning of chain damage according to an embodiment of the present invention. Figure 2A partial structural schematic diagram of a system for early warning of chain damage provided by an embodiment of the present invention is shown.

[0023] Icon labels: 1. Chain; 2. Guide plate; 21. First guide plate; 22. Second guide plate; 4. Pull rope switch; 5. Steel wire rope; 6. Clamping plate; 61. First clamping plate; 62. Second clamping plate; 71. Positioning cylinder; 72. Bolt; 8. Fixed end.

[0024] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the invention in any way, but rather to illustrate the concept of the invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0026] In the description of this invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0027] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0028] Example 1: As Figure 1-2 As shown, the present invention discloses a system for early warning of chain damage, which is applied to the bottom suspended chain section of the grinding table in a 4300mm wide and thick plate finishing line.

[0029] In one feasible implementation, to form the guiding and avoidance structure of the chain 1, the basic structure of this system includes a guide plate 2 and a clamping plate 6 on its outer side. Specifically, the guide plate 2 includes a pair of first guide plates 21 and second guide plates 22, which provide guide surfaces for the traveling wheels on both sides of the chain 1. On the outer sides of the first guide plates 21 and second guide plates 22, a strip-shaped metal first clamping plate 61 and a second clamping plate 62 are symmetrically welded. To build anti-pull capability, the clamping plate 6 is extended downward as a whole, that is, both the first clamping plate 61 and the second clamping plate 62 extend downward beyond the lower edge of the guide plate 2, so that a positioning cylinder 71 and a fastening bolt 72 are transversely arranged between the lower ends of the first clamping plate 61 and the second clamping plate 62. In another implementation, the first clamping plate 61 is integrally formed with the outer wall of the first guide plate 21 and the second clamping plate 62 is integrally formed with the outer wall of the second guide plate 22.

[0030] In this embodiment, the positioning cylinder 71 is laterally clamped between the lower parts of the first clamping plate 61 and the second clamping plate 62. The bolt 72 passes through the first clamping plate 61, the positioning cylinder 71, and the second clamping plate 62, and is used to lock the gap between the first guide plate 21 and the second guide plate 22. The vertical clearance between the central axis of the positioning cylinder 71 and the lowest edge of the guide plate 2 is greater than or equal to 200mm. The first clamping plate 61, the second clamping plate 62, and the positioning cylinder 71 form a physical clearance space within the 200mm height from the bottom edge of the guide plate 2 to the positioning cylinder 71, creating a vertically permeable physical clearance space.

[0031] In one feasible implementation, this application innovatively incorporates a warning and interception architecture, namely, adding hardware interlocking monitoring directly below vulnerable areas, such as the area between two adjacent guide plates. Specifically, such as... Figure 1 As shown, a fixed end 8 of the pull rope is installed at the middle position separating the two sections of the chain 1, and a pull rope switch 4 is installed on each side of the fixed end 8. A steel wire rope 5 is stretched taut in a straight line from the fixed end 8 to the actuating handle of the pull rope switches 4 on both sides. Specifically, the steel wire rope 5 is arranged parallel to the running direction of the chain 1, with one end fixed to the fixed end 8 and the other end flexibly connected to the actuating contact of the pull rope switch 4. The steel wire rope 5 is taut, and its vertical distance from the lower edges of the first guide plate 21 and the second guide plate 22 ranges from 50mm to 70mm. Preferably, the optimal distance between the steel wire rope 5 and the lower edge of the guide plate 2 is 60mm, which is the preset chain trigger gap.

[0032] In one feasible implementation, the system further includes a transmission device that provides power to the chain 1, the control circuit of which is electrically connected to the signal output terminal of the pull rope switch 4. When the chain 1 derails and falls, and its falling amplitude exceeds the chain drop trigger gap, the chain 1 physically presses down on the wire rope 5, forcing the pull rope switch 4 to generate mechanical displacement and cut off the power supply to the drive motor of the transmission device 3. The pull rope switch 4 has an action trigger threshold, the deformation displacement corresponding to which the action trigger threshold is less than the elastic breaking limit length of the wire rope 5.

[0033] Example 2: This example discloses the operation of the system for early warning of chain damage described in Example 1 under different working conditions. First, under normal operating conditions, the transmission device 3 drives the chain 1 to transport the finished steel plate laterally across the span, and the sprocket rolls smoothly along the edges of the first guide plate 21 and the second guide plate 22. At this time, the vertical amplitude of the chain 1 body usually does not exceed 60mm, and it cannot touch the steel wire rope 5 below, so the equipment operates smoothly.

[0034] In the event of a malfunction and blockage, if a section of chain 1 falls from the guide plate 2 track due to damage to chain 1 and chain plates, loose bolts 72, etc., firstly, because the lower positioning cylinder 71 is lowered to 200mm, the chain 1 will not immediately catch the clamping structure of the guide plate during the initial fall, preventing the guide plate 2's defense from being instantly pulled and collapsed. Then, the falling chain 1, exceeding the 60mm limit gap, will directly press or catch the lower wire rope 5 due to its enormous weight. The wire rope 5 tightens under the force, pulling the pull rope switch 4.

[0035] The contact signal of the pull rope switch 4 has been pre-connected to the essential operating conditions of the chain drive device 3, which is a PLC interlocking circuit. Once the pull rope switch 4 is triggered, the main motor of the drive device 3 immediately loses its operating conditions and stops abruptly. Ultimately, the powerful dragging force is contained in time, and the accident damage is strictly controlled within the extremely small area where the fall occurred, typically only damaging a pair of guide plates 2, thus avoiding a catastrophic overhaul.

[0036] This application creatively combines "200mm downward extension for spatial avoidance" with "60mm pull rope trigger for physical intrusion detection", solving the complex pain points under dynamic blind spots through a static layout of a purely mechanical structure.

[0037] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present invention. The implementation schemes in the above embodiments can also be further combined or replaced. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A system for early warning of chain damage, comprising a chain (1), a guide plate (2) for supporting and limiting the operation of the chain (1), and a transmission device (3) for providing power to the chain (1); characterized in that: It also includes an early warning and interruption mechanism; The warning interruption mechanism includes a pull rope switch (4) and a steel wire rope (5) mechanically connected to the pull rope switch (4). The steel wire rope (5) is taut and horizontally suspended directly below the guide plate (2), and a preset chain trigger gap is formed between the steel wire rope (5) and the lower edge of the guide plate (2). The signal output terminal of the pull rope switch (4) is electrically connected to the control circuit of the transmission device (3).

2. The system for early warning of chain damage according to claim 1, characterized in that: The preset vertical distance range of the chain trigger gap is 50mm to 70mm.

3. The system for early warning of chain damage according to claim 1, characterized in that: It also includes a clamping plate (6), a positioning cylinder (71), and bolts (72); The guide plate (2) includes a first guide plate (21) and a second guide plate (22) arranged in parallel pairs. The clamping plate (6) includes a first clamping plate (61) and a second clamping plate (62) respectively fixed to the outside of the first guide plate (21) and the second guide plate (22), and the first clamping plate (61) and the second clamping plate (62) both extend downward beyond the lower edge of the guide plate (2).

4. The system for early warning of chain damage according to claim 3, characterized in that: The positioning cylinder (71) is laterally clamped between the lower parts of the first clamping plate (61) and the second clamping plate (62). The bolt (72) passes through the first clamping plate (61), the positioning cylinder (71) and the second clamping plate (62) to lock the opening distance between the first guide plate (21) and the second guide plate (22).

5. The system for early warning of chain damage according to claim 4, characterized in that: The vertical distance between the center axis of the positioning cylinder (71) and the lower edge of the guide plate (2) is greater than or equal to 200mm; The first clamping plate (61), the second clamping plate (62), and the positioning cylinder (71) form a physical clearance space for the chain (1) to pass through when it falls.

6. The system for early warning of chain damage according to claim 1, characterized in that: The wire rope (5) is arranged parallel to the running direction of the chain (1). The system also includes a fixed end (8). One end of the wire rope (5) is fixed to the fixed end (8), and the other end is flexibly connected to the action contact of the pull rope switch (4).

7. The system for early warning of chain damage according to claim 6, characterized in that: The fixed end (8) is provided at the center of the conveying section of the chain (1), and two pull rope switches (4) are symmetrically provided at both ends of the conveying section of the chain (1). The two steel wire ropes (5) extend from the fixed end (8) in the middle to the pull rope switches (4) on both sides.

8. The system for early warning of chain damage according to claim 1, characterized in that: When the chain (1) derails and falls and its falling amplitude exceeds the chain trigger gap, the chain (1) physically presses down on the wire rope (5), forcing the pull rope switch (4) to generate mechanical displacement and cut off the power supply to the drive motor of the transmission device (3).

9. The system for early warning of chain damage according to claim 1, characterized in that: The pull rope switch (4) has an action trigger threshold, and the deformation displacement corresponding to the action trigger threshold is less than the elastic breaking limit length of the wire rope (5).

10. The system for early warning of chain damage according to claim 4, characterized in that: The outer walls of the first clamping plate (61) and the first guide plate (21), and the outer walls of the second clamping plate (62) and the second guide plate (22) are fixed by welding or formed as a single piece, and multiple first clamping plates (61) and second clamping plates (62) are distributed at intervals along the length direction.

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