Steel clamping accident treatment method for erecting and bar production line

Abstract

This invention provides a method for handling steel jamming accidents in vertical looper and bar production lines, belonging to the field of steel rolling production equipment. By opening a window on the operating side of the vertical looper frame and installing a hinged door at the window, it facilitates the cleaning of scrap steel inside the frame, reducing accident handling time and improving production efficiency. When the high-speed wire rod mill is operating normally, the first and second opening doors remain connected and fixed to the vertical looper frame, without affecting normal production. When a steel jamming accident occurs, simply remove the first and second fixing mechanisms and release the connection between the first and second opening doors. This allows the first and second opening doors to rotate around their connection points with the vertical looper frame via the first and second connecting mechanisms, thereby enabling the opening and closing of the first and second opening doors. This facilitates the handling of accidents occurring inside the vertical looper frame with high efficiency.

Description

Technical Field

[0001] This invention relates to the field of steel rolling production equipment, and more specifically, to a method for handling steel jamming accidents in vertical looper and bar production lines. Background Technology

[0002] Looping is one of the main auxiliary equipment of modern high-speed wire rod mills. It is used to maintain an appropriate amount of looping between adjacent stands in order to achieve tension-free rolling.

[0003] When a steel jamming accident occurs, the rolled piece is easily hit by the inner wall of the vertical looper frame due to the narrow space inside the frame, resulting in bending and entanglement.

[0004] The vertical looper frames currently in use are generally enclosed structures, and the rolled workpieces can only be removed through the openings on the panel for observation, which is time-consuming and labor-intensive, seriously affecting production efficiency. Furthermore, vulnerable components such as the looper rolls and slitting guides, which are installed inside the frame, are also constrained by the frame's structure and space, making daily replacement and maintenance inconvenient. Summary of the Invention

[0005] In view of the above problems, the purpose of this invention is to provide a method for handling steel jam accidents in vertical looper and bar production lines, so as to solve the problems in the prior art, where the frame of the vertical looper is a closed structure, and the rolled workpiece can only be cleared through the opening on the panel for observation, which is time-consuming and labor-intensive and seriously affects production efficiency; and the vulnerable parts such as the looper roller and the cutting guide groove installed in the frame are also restricted by the structure and space of the frame, making it inconvenient for daily replacement and maintenance.

[0006] This invention provides a vertical looper, installed between adjacent stands of a high-speed wire rod mill. It is characterized by comprising a vertical looper stand, a looper lifting mechanism, and a hinged door. Along the transport direction of the bar production line, a bar inlet and a bar outlet are respectively provided at both ends of the vertical looper stand. A first pressure roller and a second pressure roller are respectively arranged inside the vertical looper stand near the bar inlet and the bar outlet. A window is provided on the operating side of the vertical looper stand. The looper lifting mechanism includes a looper lifting roller disposed inside the vertical looper stand, a swing arm hinged to one end of the looper lifting roller, and a telescopic end... The other end of the swing arm is hinged to an electrically controlled telescopic component; the hinged door is located at the window and includes a first opening door and a second opening door; the first opening door and the second opening door are connected; the side end of the first opening door is rotatably connected to the vertical looper frame through a first connecting mechanism; the side end of the second opening door is rotatably connected to the vertical looper frame through a second connecting mechanism; the upper part of the first opening door is detachably fixed to the vertical looper frame through a first fixing mechanism; the upper part of the second opening door is detachably fixed to the vertical looper frame through a second fixing mechanism.

[0007] Furthermore, in a preferred embodiment, the first connecting mechanism includes a first fixing lug fixed to the outer wall of the vertical looper frame, a first connecting lug fixed to the outer wall of the first opening and closing door, and a first pin vertically passing through the connecting hole of the first connecting lug and the fixing hole of the first fixing lug.

[0008] Furthermore, in a preferred embodiment, the first connecting ear includes an upper first connecting ear located above the first fixing ear and a lower first connecting ear located below the first fixing ear.

[0009] Furthermore, in a preferred embodiment, the second connecting mechanism includes a second fixing lug fixed to the outer wall of the vertical looper frame, a second connecting lug fixed to the outer wall of the second opening and closing door, and a second pin vertically passing through the connecting hole of the second connecting lug and the fixing hole of the second fixing lug.

[0010] Furthermore, in a preferred embodiment, the second connecting ear includes an upper second connecting ear located above the second fixing ear and a lower second connecting ear located below the second fixing ear.

[0011] Furthermore, a preferred embodiment is that the first opening door and the second opening door are connected by a third connecting mechanism; wherein the third connecting mechanism includes a third connecting lug fixed to the outer wall of the first opening door, a third fixing lug fixed to the outer wall of the second opening door, and a third pin vertically passing through the connecting hole of the third connecting lug and the fixing hole of the third fixing lug.

[0012] Furthermore, in a preferred embodiment, the third connecting ear includes an upper third connecting ear located above the third fixing ear and a lower third connecting ear located below the third fixing ear.

[0013] Furthermore, in a preferred embodiment, the first fixing mechanism includes a first connecting piece and a first pin structure; the bottom end of the first connecting piece is fixed to the first opening / closing door, and a first connecting elongated hole is provided on the first connecting piece; a first fixing elongated hole corresponding to the position of the first connecting elongated hole is provided on the vertical loop frame; the first pin structure includes a first pin body passing through the first connecting elongated hole and the first fixing elongated hole, and a first inner clamping connector and a first outer clamping connector respectively fixed at both ends of the first pin body; when the positional relationship between the first inner clamping connector and the first fixing elongated hole and the positional relationship between the first outer clamping connector and the first connecting elongated hole are both cross-shaped, the first pin body is fixed between the first connecting elongated hole and the first fixing elongated hole by the first outer clamping connector and the first inner clamping connector; when the positional relationship between the first inner clamping connector and the first fixing elongated hole and the positional relationship between the first outer clamping connector and the first connecting elongated hole are both straight, the first outer clamping connector and the first inner clamping connector release the fixation of the first pin body between the first connecting elongated hole and the first fixing elongated hole.

[0014] Furthermore, in a preferred embodiment, the second fixing mechanism includes a second connecting piece and a second pin structure; the bottom end of the second connecting piece is fixed to the second opening / closing door, and a second connecting elongated hole is provided on the second connecting piece; a second fixing elongated hole corresponding to the position of the second connecting elongated hole is provided on the vertical loop frame; the second pin structure includes a second pin body passing through the second connecting elongated hole and the second fixing elongated hole, and a second inner clamping connector and a second outer clamping connector respectively fixed at both ends of the second pin body; when the positional relationship between the second inner clamping connector and the second fixing elongated hole and the positional relationship between the second outer clamping connector and the second connecting elongated hole are both in a cross structure, the second pin body is fixed between the second connecting elongated hole and the second fixing elongated hole by the second outer clamping connector and the second inner clamping connector; when the positional relationship between the second inner clamping connector and the second fixing elongated hole and the positional relationship between the second outer clamping connector and the second connecting elongated hole are both in a straight line structure, the second outer clamping connector and the second inner clamping connector release the fixation of the second pin body between the second connecting elongated hole and the second fixing elongated hole.

[0015] The present invention also provides a method for handling steel jamming accidents in a bar production line. The vertical looper described above is installed between adjacent frames of the main body of a high-speed wire rod mill. When a steel jamming accident occurs during the production of high-speed wire rod, the steel jamming accident inside the main body of the high-speed wire rod mill is handled through the hinge door on the vertical looper near the point where the steel jamming accident occurs.

[0016] As can be seen from the above technical solution, the method for handling steel jamming accidents in the vertical looper and bar production line provided by the present invention opens a window on the operating side of the vertical looper frame and installs a hinged door at the window to facilitate the cleaning of scrap steel inside the frame, reduce accident handling time, and improve production efficiency. When the high-speed wire rod mill is working normally, the first and second opening doors are kept in a connected state, and the first and second opening doors are fixed to the vertical looper frame by the first and second fixing mechanisms, respectively, without affecting normal production. When a steel jamming accident occurs, it is only necessary to remove the first and second fixing mechanisms and release the connection between the first and second opening doors, so that the first and second opening doors can rotate around the connection point with the vertical looper frame by the first and second connecting mechanisms, respectively, thereby realizing the opening and closing of the first and second opening doors, so as to facilitate the handling of accidents occurring inside the vertical looper frame, with high handling efficiency. The present invention has the advantages of simple structure, easy operation, and reduced investment and maintenance costs.

[0017] To achieve the foregoing and related objectives, one or more aspects of the invention include the features that will be described in detail below. The following description and accompanying drawings illustrate certain exemplary aspects of the invention. However, these aspects indicate only a few of the various ways in which the principles of the invention can be used. Furthermore, the invention is intended to encompass all such aspects and their equivalents. Attached Figure Description

[0018] Other objects and results of the invention will become more apparent and readily understood with reference to the following description taken in conjunction with the accompanying drawings, and with a more complete understanding of the invention.

[0019] Figure 1 This is a schematic diagram of the structure of the slip-on sleeve according to an embodiment of the present invention;

[0020] Figure 2 This is a top view of the vertical slip-on structure according to an embodiment of the present invention;

[0021] Figure 3 This is a schematic diagram of the structure of the first connecting mechanism according to an embodiment of the present invention.

[0022] In the attached drawings, 1-stand-up looper frame, 11-bar inlet, 12-bar outlet, 13-frame plate, 14-cover plate, 15-lifting lug, 16-base, 21-lifting roller, 22-swing arm, 23-electrically controlled telescopic component, 31-first opening and closing door, 32-second opening and closing door, 33-handle, 4-first pressure roller, 5-second pressure roller, 6-first fixing mechanism, 7-second fixing mechanism, 81-first fixing ear, 82-first connecting ear, 821-first connecting ear for upper sheet, 822-first connecting ear for lower sheet, 83-first pin, 84-second fixing ear, 85-second connecting ear, 86-second pin, 9-third connecting mechanism.

[0023] In all the accompanying drawings, the same reference numerals indicate similar or corresponding features or functions. Detailed Implementation

[0024] In the following description, numerous specific details are set forth for illustrative purposes and to provide a thorough understanding of one or more embodiments. However, it will be apparent that these embodiments may also be implemented without these specific details.

[0025] In response to the aforementioned problems in the existing technology, such as the closed structure of the vertical looper frame, the workpiece can only be cleared through the opening on the panel for observation, which is time-consuming and labor-intensive and seriously affects production efficiency; and the vulnerable parts such as the looper roller and the cutting guide groove installed in the frame are also restricted by the structure and space of the frame, making it inconvenient for daily replacement and maintenance. Therefore, a method for handling steel jamming accidents in vertical looper and bar production lines is proposed.

[0026] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0027] To illustrate the method for handling steel jamming accidents in vertical looper and bar production lines provided by this invention. Figure 1 The structure of the slip-on sleeve according to an embodiment of the present invention is shown; Figure 2 The top view of the vertical slip-on structure according to an embodiment of the present invention is shown; Figure 3 The structure of a first connecting mechanism according to an embodiment of the present invention is shown.

[0028] like Figures 1 to 3 As shown in the diagram, the vertical looper provided by this invention is disposed between adjacent stands of a high-speed wire rod mill, and includes a vertical looper stand 1, a looper lifting mechanism, and a hinge door; wherein,

[0029] Along the conveying direction of the bar production line, a bar inlet 11 and a bar outlet 12 are respectively provided at both ends of the vertical looper frame 1; a first pressure roller 4 and a second pressure roller 5 are respectively provided inside the vertical looper frame 1 near the bar inlet 11 and the bar outlet 12; a window is provided on the operating side of the vertical looper frame 1.

[0030] The lifting mechanism includes a lifting roller 21 installed inside the vertical looper frame 1, a swing arm 22 hinged to one end of the lifting roller 21, and an electrically controlled telescopic component 23 with its telescopic end hinged to the other end of the swing arm 22.

[0031] The hinged door is located at the window and includes a first hinged door 31 and a second hinged door 32. The first hinged door 31 and the second hinged door 32 are connected. The side end of the first hinged door 31 is rotatably connected to the vertical slip-on frame 1 through a first connecting mechanism. The side end of the second hinged door 32 is rotatably connected to the vertical slip-on frame 1 through a second connecting mechanism. The upper part of the first hinged door 31 is detachably fixed to the vertical slip-on frame 1 through a first fixing mechanism 6. The upper part of the second hinged door 32 is detachably fixed to the vertical slip-on frame through a second fixing mechanism 7.

[0032] Specifically, the vertical looper frame 1 includes two relatively parallel frame plates 13 and a cover plate 14 disposed between the tops of the two frame plates 13. A lifting lug 15 is provided on the top of the cover plate 14 of the vertical looper frame 1. The lifting lug 15 facilitates the hoisting of the vertical looper frame 1.

[0033] A base 16 is provided at the bottom of the vertical looper frame 1; the bottom of the vertical looper frame 1 is fixed to the base 16 by a detachable fastener. The detachable fastener is preferably, but not limited to, a bolt.

[0034] Handles 33 are provided on the outer walls of both the first opening door 31 and the second opening door 32 to facilitate the opening and closing of the first opening door 31 and the second opening door 32.

[0035] By opening a window on the operating side of the vertical looper frame 1 and installing a hinged door at the window, it is convenient to clean scrap steel inside the frame, reduce accident handling time, and improve production efficiency. When the high-speed wire rod mill is working normally, the first opening and closing door 31 and the second opening and closing door 32 are kept in a connected state, and the first opening and closing door 31 and the second opening and closing door 32 are fixed to the vertical looper frame 1 by the first fixing mechanism 6 and the second fixing mechanism 7 respectively, without affecting normal production. When a steel jamming accident occurs, it is only necessary to remove the first fixing mechanism 6 and the second fixing mechanism 7 and release the connection between the first opening and closing door 31 and the second opening and closing door 32, so that the first opening and closing door 31 and the second opening and closing door 32 can rotate around the connection point with the vertical looper frame 1 by the first connecting mechanism and the second connecting mechanism respectively, thereby realizing the opening and closing of the first opening and closing door 31 and the second opening and closing door 32, so as to handle the accident occurring inside the vertical looper frame with high handling efficiency. The present invention has the advantages of simple structure, easy operation, and reduced investment and maintenance costs.

[0036] As a preferred embodiment of the present invention, the first connecting mechanism includes a first fixing ear 81 fixed on the outer side wall of the vertical loop frame 1, a first connecting ear 82 fixed on the outer side wall of the first opening and closing door 31, and a first pin 83 vertically passing between the connecting hole of the first connecting ear 82 and the fixing hole of the first fixing ear 81.

[0037] Specifically, the structural design of the aforementioned first connecting mechanism allows the first opening and closing door 31 to rotate around the first pin 83, thereby enabling the first opening and closing door 31 to open outwards, facilitating the handling of internal frame accidents such as steel jams near the location of the first opening and closing door 31. Furthermore, this structural design facilitates the installation and disassembly of the first opening and closing door 31.

[0038] As a preferred embodiment of the present invention, the first connecting ear 82 includes an upper first connecting ear 821 located above the first fixing ear 81 and a lower first connecting ear 822 located below the first fixing ear 81.

[0039] By setting two first connecting ears 82, the rotational connection between the outer end of the first opening and closing door 31 and the vertical loop frame 1 is made more reliable and secure.

[0040] As a preferred embodiment of the present invention, the second connecting mechanism includes a second fixing ear 84 fixed on the outer side wall of the vertical looper frame 1, a second connecting ear 85 fixed on the outer side wall of the second opening and closing door 32, and a second pin 86 vertically passing between the connecting hole of the second connecting ear 85 and the fixing hole of the second fixing ear 84.

[0041] Specifically, the structural design of the second connecting mechanism allows the second opening / closing door 32 to rotate around the second pin 86, thereby enabling the second opening / closing door 32 to open outwards, facilitating the handling of internal frame accidents such as steel jams near the location of the second opening / closing door 32. Furthermore, this structural design facilitates the installation and disassembly of the second opening / closing door 32.

[0042] As a preferred embodiment of the present invention, the second connecting ear 85 includes an upper second connecting ear located above the second fixing ear 84 and a lower second connecting ear located below the second fixing ear 84.

[0043] By setting two second connecting ears 85, the rotational connection between the outer end of the second opening and closing door 32 and the vertical loop frame 1 is made more reliable and secure.

[0044] As a preferred embodiment of the present invention, the first opening and closing door 31 and the second opening and closing door 32 are connected by a third connecting mechanism 9; wherein, the third connecting mechanism includes a third connecting ear fixed to the outer wall of the first opening and closing door 31, a third fixing ear fixed to the outer wall of the second opening and closing door 32, and a third pin 91 vertically passing through the connecting hole of the third connecting ear and the fixing hole of the third fixing ear.

[0045] Specifically, the structure of the third connecting mechanism is the same as that of the first and second connecting mechanisms. Depending on the location of the accident inside the frame, the first or second connecting mechanism can be disassembled, allowing the first or second opening door 31 or the second opening door 32 to rotate relative to the second or first opening door 32 around the third pin, thereby enabling the single door to open outward. Alternatively, by removing the third pin 91, the first or second opening door 31 and the second opening door 32 can be made to open in opposite directions, making the opening and closing of the hinge door more flexible.

[0046] As a preferred embodiment of the present invention, the third connecting ear includes an upper third connecting ear located above the third fixing ear and a lower third connecting ear located below the third fixing ear.

[0047] By setting two third connecting ears, the rotational connection between the second opening and closing door 32 and the first opening and closing door 31 is made more reliable and secure.

[0048] As a preferred embodiment of the present invention, the first fixing mechanism 6 includes a first connecting piece and a first pin structure; the bottom end of the first connecting piece is fixed to the first opening and closing door 31, and a first connecting elongated hole is provided on the first connecting piece; a first fixing elongated hole corresponding to the position of the first connecting elongated hole is provided on the vertical loop frame 1; the first pin structure includes a first pin body passing through the first connecting elongated hole and the first fixing elongated hole, and a first inner clamping connector and a first outer clamping connector respectively fixed at both ends of the first pin body; when the positional relationship between the first inner clamping connector and the first fixing elongated hole and the positional relationship between the first outer clamping connector and the first connecting elongated hole are both cross-shaped, the first pin body is fixed between the first connecting elongated hole and the first fixing elongated hole by the first outer clamping connector and the first inner clamping connector; when the positional relationship between the first inner clamping connector and the first fixing elongated hole and the positional relationship between the first outer clamping connector and the first connecting elongated hole are both straight, the first outer clamping connector and the first inner clamping connector release the fixation of the first pin body between the first connecting elongated hole and the first fixing elongated hole.

[0049] The above structural design allows the first opening and closing door 31 to be fixed on the vertical sliding frame 1 during operation. In the event of an accident, the fixation between the two can be released by removing the first pin body.

[0050] As a preferred embodiment of the present invention, the second fixing mechanism 7 includes a second connecting piece and a second pin structure; the bottom end of the second connecting piece is fixed to the second opening and closing door 32, and a second connecting elongated hole is provided on the second connecting piece; a second fixing elongated hole corresponding to the position of the second connecting elongated hole is provided on the vertical loop frame 1; the second pin structure includes a second pin body passing through the second connecting elongated hole and the second fixing elongated hole, and a second inner clamping connector and a second outer clamping connector respectively fixed at both ends of the second pin body; when the positional relationship between the second inner clamping connector and the second fixing elongated hole and the positional relationship between the second outer clamping connector and the second connecting elongated hole are both cross-shaped, the second pin body is fixed between the second connecting elongated hole and the second fixing elongated hole by the second outer clamping connector and the second inner clamping connector; when the positional relationship between the second inner clamping connector and the second fixing elongated hole and the positional relationship between the second outer clamping connector and the second connecting elongated hole are both straight, the second outer clamping connector and the second inner clamping connector release the fixation of the second pin body between the second connecting elongated hole and the second fixing elongated hole.

[0051] The above structural design allows the second opening and closing door 32 to be fixed on the vertical sliding frame 1 during operation. In the event of an accident, the fixation between the two can be released by removing the second pin body.

[0052] As a preferred embodiment of the present invention, the electrically controlled telescopic component 23 is preferably, but not limited to, a cylinder; the fixed end of the cylinder is hinged to the top of the outer side of the vertical looper frame 1.

[0053] In a preferred embodiment of the present invention, the outer end of the first opening / closing door 31 is detachably fixed to the vertical loop frame 1 by a third fixing mechanism; the third fixing mechanism includes a third connecting piece and a third pin structure; the bottom end of the third connecting piece is fixed to the first opening / closing door 31, and a third connecting elongated hole is provided on the third connecting piece; a third fixing elongated hole corresponding to the position of the third connecting elongated hole is provided on the vertical loop frame 1; the third pin structure includes a third pin body passing through the third connecting elongated hole and the third fixing elongated hole, and third inner pins respectively fixed at both ends of the third pin body. The third outer clamping connector and the third inner clamping connector; when the positional relationship between the third inner clamping connector and the third fixed elongated hole and the positional relationship between the third outer clamping connector and the third connecting elongated hole are both in a cross structure, the third pin body is fixed between the third connecting elongated hole and the third fixed elongated hole by the third outer clamping connector and the third inner clamping connector; when the positional relationship between the third inner clamping connector and the third fixed elongated hole and the positional relationship between the third outer clamping connector and the third connecting elongated hole are both in a straight line structure, the third outer clamping connector and the third inner clamping connector release the fixation of the third pin body between the third connecting elongated hole and the third fixed elongated hole.

[0054] In a preferred embodiment of the present invention, the outer end of the second opening / closing door 32 is detachably fixed to the vertical slip-on frame 1 by a fourth fixing mechanism; the fourth fixing mechanism includes a fourth connecting piece and a fourth pin structure; the bottom end of the fourth connecting piece is fixed to the second opening / closing door 32, and a fourth connecting elongated hole is provided on the fourth connecting piece; a fourth fixing elongated hole corresponding to the position of the fourth connecting elongated hole is provided on the vertical slip-on frame 1; the fourth pin structure includes a fourth pin body passing through the fourth connecting elongated hole and the fourth fixing elongated hole, and fourth pins respectively fixed at both ends of the fourth pin body. The fourth pin shaft body is fixed between the fourth connecting long hole and the fourth fixed long hole by the fourth outer clamping connector and the fourth inner clamping connector; when the positional relationship between the fourth inner clamping connector and the fourth fixed long hole and the fourth outer clamping connector and the fourth connecting long hole are both in a cross structure, the fourth pin shaft body is fixed between the fourth connecting long hole and the fourth fixed long hole by the fourth outer clamping connector and the fourth inner clamping connector; when the positional relationship between the fourth inner clamping connector and the fourth fixed long hole and the fourth outer clamping connector and the fourth connecting long hole are both in a straight line structure, the fourth outer clamping connector and the fourth inner clamping connector release the fixation of the fourth pin shaft body between the fourth connecting long hole and the fourth fixed long hole.

[0055] The third and fourth fixing mechanisms facilitate the fixing of the hinge door on both sides of the window of the vertical sliding frame 1 during operation.

[0056] The present invention provides a method for handling steel jamming accidents in a bar production line. The vertical looper of the present invention, as described above, is installed between adjacent frames of the main body of a high-speed wire rod mill. When a steel jamming accident occurs during the production of high-speed wire rod, the steel jamming accident inside the main body of the high-speed wire rod mill is handled through the hinge door on the vertical looper near the point where the steel jamming accident occurs.

[0057] As can be seen from the above specific embodiments, the method for handling steel jamming accidents in vertical looper and bar production lines provided by the present invention facilitates the cleaning of scrap steel inside the frame by opening a window on the operating side of the vertical looper frame and installing a hinged door at the window, thereby reducing accident handling time and improving production efficiency. When the high-speed wire rod mill is working normally, the first and second opening doors remain connected, and the first and second opening doors are fixed to the vertical looper frame by the first and second fixing mechanisms, respectively, without affecting normal production. When a steel jamming accident occurs, it is only necessary to remove the first and second fixing mechanisms and release the connection between the first and second opening doors, so that the first and second opening doors can rotate around the connection point with the vertical looper frame by the first and second connecting mechanisms, respectively, thereby realizing the opening and closing of the first and second opening doors, which facilitates the handling of accidents occurring inside the vertical looper frame and has high handling efficiency. The present invention has the advantages of simple structure, easy operation, and reduced investment and maintenance costs.

[0058] The method for handling steel jamming accidents in a vertical looper and bar production line according to the present invention has been described above by way of example with reference to the accompanying drawings. However, those skilled in the art should understand that various modifications can be made to the method for handling steel jamming accidents in a vertical looper and bar production line according to the present invention without departing from the scope of the invention. Therefore, the scope of protection of the present invention should be determined by the contents of the appended claims.

Claims

1. A vertical looper, disposed between adjacent stands of a high-speed wire rod mill, characterized in that, This includes the lifting frame, lifting mechanism, and hinge doors; among which, Along the conveying direction of the bar production line, a bar inlet and a bar outlet are respectively provided at both ends of the vertical looper frame; a first pressure roller and a second pressure roller are respectively provided inside the vertical looper frame near the bar inlet and the bar outlet; a window is provided on the operating side of the vertical looper frame; The lifting mechanism includes a lifting roller disposed inside the vertical looper frame, a swing arm hinged to one end of the lifting roller, and an electrically controlled telescopic component with its telescopic end hinged to the other end of the swing arm. The hinged door is located at the window and includes a first hinged door and a second hinged door; the first hinged door and the second hinged door are connected; the side end of the first hinged door is rotatably connected to the vertical slip-on frame via a first connecting mechanism; the side end of the second hinged door is rotatably connected to the vertical slip-on frame via a second connecting mechanism; the upper part of the first hinged door is detachably fixed to the vertical slip-on frame via a first fixing mechanism; the upper part of the second hinged door is detachably fixed to the vertical slip-on frame via a second fixing mechanism; wherein, The first fixing mechanism includes a first connecting piece and a first pin structure; The bottom end of the first connecting piece is fixed to the first opening and closing door, and a first connecting elongated hole is provided on the first connecting piece; a first fixing elongated hole corresponding to the position of the first connecting elongated hole is provided on the vertical loop frame; The first pin structure includes a first pin body passing through the first connecting elongated hole and the first fixing elongated hole, and a first inner clamping connector and a first outer clamping connector respectively fixed at both ends of the first pin body. When the positional relationship between the first inner clamping connector and the first fixed elongated hole and the positional relationship between the first outer clamping connector and the first connecting elongated hole are both in a cross structure, the first pin body is fixed between the first connecting elongated hole and the first fixed elongated hole by the first outer clamping connector and the first inner clamping connector. When the positional relationship between the first inner clamping connector and the first fixed elongated hole and the positional relationship between the first outer clamping connector and the first connecting elongated hole are both in a straight line, the first outer clamping connector and the first inner clamping connector release the fixation of the first pin body between the first connecting elongated hole and the first fixed elongated hole.

2. The slipknot according to claim 1, characterized in that, The first connecting mechanism includes a first fixing lug fixed to the outer wall of the vertical looper frame, a first connecting lug fixed to the outer wall of the first opening and closing door, and a first pin vertically passing through the connecting hole of the first connecting lug and the fixing hole of the first fixing lug.

3. The slipknot according to claim 2, characterized in that, The first connecting ear includes an upper first connecting ear located above the first fixing ear and a lower first connecting ear located below the first fixing ear.

4. The slipknot according to claim 1, characterized in that, The second connecting mechanism includes a second fixing lug fixed to the outer wall of the vertical looper frame, a second connecting lug fixed to the outer wall of the second opening and closing door, and a second pin vertically passing between the connecting hole of the second connecting lug and the fixing hole of the second fixing lug.

5. The slipknot according to claim 4, characterized in that, The second connecting ear includes an upper second connecting ear located above the second fixing ear and a lower second connecting ear located below the second fixing ear.

6. The slipknot according to claim 1, characterized in that, The first and second doors are connected by a third connecting mechanism; wherein... The third connecting mechanism includes a third connecting lug fixed to the outer wall of the first opening and closing door, a third fixing lug fixed to the outer wall of the second opening and closing door, and a third pin vertically passing through the connecting hole of the third connecting lug and the fixing hole of the third fixing lug.

7. The slip-on sleeve according to claim 6, characterized in that, The third connecting ear includes an upper third connecting ear located above the third fixing ear and a lower third connecting ear located below the third fixing ear.

8. The slipknot according to claim 1, characterized in that, The second fixing mechanism includes a second connecting piece and a second pin structure; The bottom end of the second connecting piece is fixed to the second opening and closing door, and a second connecting elongated hole is provided on the second connecting piece; a second fixing elongated hole corresponding to the position of the second connecting elongated hole is provided on the vertical loop frame; The second pin structure includes a second pin body passing through the second connecting elongated hole and the second fixing elongated hole, and a second inner clamping connector and a second outer clamping connector respectively fixed at both ends of the second pin body; When the positional relationship between the second inner clamping connector and the second fixed elongated hole and the positional relationship between the second outer clamping connector and the second connecting elongated hole are both in a cross structure, the second pin body is fixed between the second connecting elongated hole and the second fixed elongated hole by the second outer clamping connector and the second inner clamping connector. When the positional relationship between the second inner clamping connector and the second fixed elongated hole and the positional relationship between the second outer clamping connector and the second connecting elongated hole are both in a straight line, the second outer clamping connector and the second inner clamping connector release the fixation of the second pin body between the second connecting elongated hole and the second fixed elongated hole.

9. A method for handling steel jamming accidents in a bar production line, characterized in that, The vertical looper as described in any one of claims 1-8 is installed between adjacent stands of the main body of the high-speed wire rod mill. When a steel jamming accident occurs during the production of high-speed wire rod, the steel jamming accident inside the main body of the high-speed wire rod mill is handled through the hinge door on the vertical looper near the point where the steel jamming accident occurs.

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