Traction mechanism, control system and operation method

Abstract

The invention provides a traction mechanism, a control system and an operation method, and relates to the technical field of metallurgical pouring, a hook mechanism comprises a first hook and a second hook, and the first hook and the second hook are connected with each other through a fixing pin shaft; the connecting mechanism comprises a first connecting rod, a second connecting rod, a first connecting pin shaft, a second connecting pin shaft, a sliding pin shaft and a connecting rod connecting block; the first end of the first connecting rod is connected with the first hook through a first connecting pin shaft, the first end of the second connecting rod is connected with the second hook through a second connecting pin shaft, and the second end of the first connecting rod and the second end of the second connecting rod are connected through a sliding pin shaft. According to the traction mechanism, automatic hooking and unhooking and traction of the traction mechanism on the plane are achieved, the safety of the traction process is improved, and operation is more flexible, simpler and more convenient.

Description

Technical Field

[0001] The invention relates to the technical field of metallurgical casting, and in particular to a traction mechanism, a control system and an operation method. Background Art

[0002] As a common mechanical structure equipment, the traction mechanism plays an important role in industrial production. Its main function is to achieve the connection, traction and displacement of objects, especially in scenes that are difficult to complete by manpower. It plays an irreplaceable role. In the casting system of the metallurgical industry, the traction mechanism is mainly used for the traction and positioning of the ingot mold car, and is a key equipment to ensure the smooth progress of the casting process.

[0003] The existing traction mechanism usually adopts a simple mechanical connection method, and the operation method is mainly manual. This traditional operation mode has many shortcomings: first, in the dangerous metallurgical production environment, manual operation is likely to cause safety hazards to operators; second, the accuracy and efficiency of manual operation are difficult to ensure, which may affect the stability of the casting process; third, a single operation mode is difficult to adapt to the operation requirements under different working conditions, reducing production efficiency.

[0004] The prior art CN103882851A provides an automatic towing hook device, which adopts a technical solution of a disconnecting mechanism and a connecting mechanism. However, the device only solves the problem of automatic towing hooks on a plane parallel to the gravity direction, but cannot solve the problem of automatic towing hooks on a plane perpendicular to the gravity direction. The device is prone to jamming and asynchronism during operation, and the operation is not flexible enough and the safety needs to be improved. Especially in high-risk environments such as metallurgical casting, how to realize the automatic operation of the towing mechanism on the plane, ensure the safety of the operator, and ensure the reliability and flexibility of the towing process has become a technical problem that needs to be solved urgently. Summary of the invention

[0005] The object of the present invention is to provide a traction mechanism, a control system and an operation method which can realize automatic unhooking and traction on a plane and ensure the safety and operational flexibility of the traction process.

[0006] To achieve the above object, the present invention is implemented by the following technical solutions: a traction mechanism, including a hook mechanism, a connecting mechanism and a driving mechanism, the hook mechanism including a first hook and a second hook, the first hook and the second hook are connected to each other by a fixed pin shaft;

[0007] The connecting mechanism includes a first connecting rod, a second connecting rod, a first connecting pin shaft, a second connecting pin shaft, a sliding pin shaft and a connecting rod connecting block; the first end of the first connecting rod is connected to the first hook through the first connecting pin shaft, the first end of the second connecting rod is connected to the second hook through the second connecting pin shaft, and the second ends of the first connecting rod and the second connecting rod are connected to each other through the sliding pin shaft;

[0008] The two sides of the connecting rod connecting block are provided with limiting plates, the first end of the connecting rod connecting block is connected to the sliding pin shaft, and the second end is connected to the driving mechanism.

[0009] Further: The traction mechanism further includes an upper fixed panel, a lower fixed panel, a first positioning plate, a second positioning plate and a rear positioning plate; the upper fixed panel is arranged at the top of the plane where the traction hook is located, the lower fixed panel is arranged at the bottom of the plane where the traction hook is located, and a first positioning plate, a second positioning plate and a rear positioning plate are arranged between the upper fixed panel and the lower fixed panel.

[0010] Further: The driving mechanism includes an electro-hydraulic push rod, a first plug pin and a second plug pin. The first end of the electro-hydraulic push rod is connected to the connecting rod connecting block through the first plug pin; the second end of the electro-hydraulic push rod is connected to the rear positioning plate through the second plug pin.

[0011] Further: The first hook and the second hook are respectively provided with rolling bodies; a first limit switch and a second limit switch are arranged on the upper fixed panel.

[0012] Further: The first positioning plate, the second positioning plate and the rear positioning plate are fixedly connected to the upper fixed panel and the lower fixed panel through M16 bolts, elastic washers and flat washers in sequence.

[0013] A control system is applied to the traction mechanism described in any one of the above. It includes an operation box, a centralized control operation console and a remote controller. The centralized control operation console is connected to the traction mechanism, the operation box is connected to the centralized control operation console. Two control buttons, namely hook open in place and hook close in place, are respectively arranged on the operation box, and two control buttons, namely hook open in place and hook close in place, are respectively arranged on the remote controller; the remote controller is provided with a transmitting device, and a receiver is arranged on the traction mechanism.

[0014] Further: The centralized control operation console is provided with a mode conversion switch knob. The control system has three control modes: manual mode, remote PLC control mode and remote controller control mode, and only one of them can be enabled simultaneously.

[0015] An operating method is applied to the control system described in any of the above. In the manual mode, the remote PLC control mode and the remote control mode are invalid. The hook is fully opened by pressing the open-in-place control button, and the hook is fully closed by pressing the close-in-place control button.

[0016] An operating method is applied to the control system described in any of the above. In the remote PLC control mode, the centralized control console is automatically controlled by the PLC, the manual mode and the remote control mode are invalid. The control system detects the position of the tractor through the first limit switch and the second limit switch, and sends a feedback signal after detecting the position of the limit switch. After receiving the feedback signal, the control system performs the operation of opening or closing the hook according to the feedback signal.

[0017] An operating method is applied to the control system described in any of the above. In the remote control mode, the manual mode and the remote PLC control mode are invalid; the hook is fully opened by pressing the open-in-place control button on the remote control, and the hook is fully closed by pressing the close-in-place control button.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] First, the device adopts a driving mode combining a planar link mechanism and an electro-hydraulic push rod, realizing the automatic opening and closing of the hook, and ensuring the reliability of the decoupling and towing processes. Through the cross setting of the two links and the articulated cooperation with the link connecting block, the opening and closing actions are more stable and controllable, effectively avoiding the jamming and out-of-sync problems easily occurring in traditional towing mechanisms.

[0020] Second, the present invention designs three operation modes (remote PLC control, on-site manual, and remote control), and ensures interlocking between the modes, significantly improving the operation flexibility and safety of the equipment. Operators can select the most suitable operation method according to the specific working conditions, which can not only ensure the safety of remote operation but also enable on-site intervention when necessary.

[0021] Third, the present invention adds multiple protection measures in the structural design. The setting of the limit plate effectively prevents the left and right shaking of the link connecting block; the application of the rolling body reduces the friction resistance during the opening and closing process; and the configuration of the limit switch realizes the precise control of the opening and closing positions, greatly improving the operation stability and service life of the equipment.

[0022] Fourth, the installation structure of the present invention uses bolt connection and is equipped with elastic washers, which not only ensures the stability of the overall structure but also facilitates maintenance and replacement. By applying reasonable pre-tightening force to the bolts, the loosening problem during operation is effectively prevented, ensuring the long-term stable operation of the equipment.

[0023] V. The present invention realizes a complete signal feedback mechanism. By detecting the position of the hook through a limit switch and providing real-time feedback, combined with PLC program control, the entire traction process is in a controllable state, effectively improving the automation level and operation reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic top view of a traction mechanism provided by the present invention;

[0025] Figure 2 It is a schematic front view of a traction mechanism provided by the present invention;

[0026] In the figure:

[0027] 1. Connecting body; 2. First hook; 3. Second hook; 4. Fixed pin shaft; 5. First connecting rod; 6. Second connecting rod; 7. Rolling body; 8. First connecting pin shaft; 9. Second connecting pin shaft; 10. Sliding pin shaft; 11. Link connecting block; 12. Limit plate; 13. Electro-hydraulic push rod; 14. First bolt pin; 15. Second bolt pin; 16. Upper fixed panel; 17. Lower fixed panel; 18. First positioning plate; 19. Second positioning plate; 20. Rear positioning plate; 21. Bolt; 22. First limit switch; 23. Second limit switch. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0029] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0030] As Figure 1-2 shown: A traction mechanism provided by the present application includes a hook mechanism, a connection mechanism, and a drive mechanism. The hook mechanism includes a first hook 2 and a second hook 3, and the first hook 2 and the second hook 3 are connected to each other through a fixed pin shaft 4;

[0031] The connecting mechanism includes a first connecting rod 5, a second connecting rod 6, a first connecting pin shaft 8, a second connecting pin shaft 9, a sliding pin shaft 10 and a connecting rod connecting block 11; the first end of the first connecting rod 5 is connected to the first hook 2 through the first connecting pin shaft 8, the first end of the second connecting rod 6 is connected to the second hook 3 through the second connecting pin shaft 9, and the second ends of the first connecting rod 5 and the second connecting rod 6 are connected to each other through the sliding pin shaft 10;

[0032] On both sides of the connecting rod connecting block 11, there are provided limiting plates 12 which are used to limit the left and right movement of the connecting rod connecting block 11. The first end of the connecting rod connecting block 11 is connected to the sliding pin shaft 10, and the second end is connected to the driving mechanism. By designing the combination of the cross connecting rod and the sliding pin shaft 10, the movement track of the traction mechanism is optimized, friction is reduced and the transmission stability is improved.

[0033] It should be noted that the connecting body 1 for connecting with the head of the ingot mold car does not belong to the components of this device, but only cooperates with this device during use to better realize the traction process of the ingot mold car.

[0034] According to a specific implementation scheme of the present invention, the traction mechanism further includes an upper fixed panel 16, a lower fixed panel 17, a first positioning plate 18, a second positioning plate 19 and a rear positioning plate 20; the upper fixed panel 16 is arranged at the top of the plane where the traction hook is located, the lower fixed panel 17 is arranged at the bottom of the plane where the traction hook is located, and between the upper fixed panel 16 and the lower fixed panel 17, there are provided the first positioning plate 18, the second positioning plate 19 and the rear positioning plate 20;

[0035] The driving mechanism includes an electro-hydraulic push rod 13, a first plug pin 14 and a second plug pin 15. The first end of the electro-hydraulic push rod 13 is connected to the connecting rod connecting block 11 through the first plug pin 14; the second end of the electro-hydraulic push rod 13 is connected to the rear positioning plate 20 through the second plug pin 15; the first hook 2 and the second hook 3 are respectively provided with rolling bodies 7 which are used to reduce the rotational friction during the opening and closing of the hooks. On the upper fixed panel 16, there are provided a first limit switch 22 and a second limit switch 23 which are used to detect the position of the shift lever on the fixed pin shaft 4 and send feedback signals; the first positioning plate 18, the second positioning plate 19 and the rear positioning plate 20 are sequentially fixedly connected to the upper fixed panel 16 and the lower fixed panel 17 through bolts 21, elastic washers and flat washers. The bolts 21 are preferably M16 bolts.

[0036] A hook control system for controlling the traction mechanism of any of the above, comprising an operation box, a centralized control console and a remote controller. The centralized control console is connected to the traction mechanism, and the operation box is connected to the centralized control console. Two control buttons, namely hook open in place and hook close in place, are respectively arranged on the operation box, and two control buttons, namely hook open in place and hook close in place, are respectively arranged on the remote controller. The remote controller is provided with a transmitting device, and the traction mechanism is provided with a receiver for receiving the signal transmitted by the remote controller.

[0037] According to a specific embodiment of the present invention, the centralized control console is provided with a mode conversion switch knob. The control system has three control modes: manual mode, remote PLC control mode and remote controller control mode, and only one of them can be enabled simultaneously.

[0038] An operation method applied to the hook control system of any of the above. In the manual mode, the remote PLC control mode and the remote controller control mode are invalid. The hook is fully opened by pressing the open in place control button, and the hook is fully closed by pressing the close in place control button.

[0039] According to a specific embodiment of the present invention, in the remote PLC control mode, the centralized control console is automatically controlled by the PLC, and the manual mode and the remote controller control mode are invalid. The control system detects the position of the tractor through the first limit switch 22 and the second limit switch 23, and sends a feedback signal after detecting the position of the limit switch. After receiving the feedback signal, the control system performs the operation of opening or closing the hook according to the feedback signal.

[0040] According to a specific embodiment of the present invention, in the remote controller control mode, the manual mode and the remote PLC control mode are invalid. The hook is fully opened by pressing the open in place control button on the remote controller, and the hook is fully closed by pressing the close in place control button.

[0041] The working principle of the present invention is as follows:

[0042] The adapter body 1 is welded and fixed to the head of the ingot mold car and is used to cooperate with the traction mechanism to complete the traction.

[0043] The first hook 2 and the second hook 3 are fixedly connected by a fixed pin shaft 4. When the traction mechanism is opened and closed, the hook rotates. To reduce the friction generated during rotation, rolling bodies 7 are respectively installed on the contact surfaces of the first hook 2 and the second hook 3 with the upper and lower fixed panels, so that the resistance during rotation is reduced and the rotation is flexible.

[0044] The first end of the first link 5 is connected to the first hook 2 through the first connecting pin shaft 8. The first end of the second link 6 is connected to the second hook 3 through the second connecting pin shaft 9. The second ends of the first link 5 and the second link 6 are connected to each other through the sliding pin shaft 10. The first end of the link connecting block 11 is connected to the sliding pin shaft 10, and the second end is connected to the driving mechanism, forming a planar link structure, optimizing the motion trajectory of the traction mechanism, reducing friction and improving the transmission stability.

[0045] When the link connecting block 11 moves back and forth, it is limited by the limiting plates 12 on both sides, only realizing the displacement back and forth, and avoiding shaking.

[0046] The first end of the electro-hydraulic push rod 13 is connected to the link connecting block 11 through the first pin 14, and the second end is connected to the rear positioning plate 20 through the second pin 15. By controlling the extension / retraction of the electro-hydraulic push rod 13, the closing / opening of the first hook 2 and the second hook 3 can be controlled. The upper fixed panel 16 and the lower fixed panel 17 are fixedly connected by bolts 21 through the first positioning plate 18, the second positioning plate 19 and the rear positioning plate 20. An elastic washer and a flat washer are installed between the bolt 21 and the positioning plate in sequence. It should be noted that when tightening the bolt 21, a torque wrench is used to moderately adjust the pre-tightening force of the bolt 21 to ensure the stable and reliable operation of the internal mechanism.

[0047] The upper fixed panel 16 is respectively installed with and fixed the limit switch one and the limit switch two. When the shift lever on the fixed pin shaft 4 touches the limit switch one / limit switch two, the traction mechanism receives the feedback signal and executes the opening / closing operation. The control line of the electro-hydraulic push rod 13 and the control line of the limit switch are respectively connected to the centralized control operation console inside the control room through the cable. The operation box is connected to the centralized control operation console, and the control points are programmed into the PLC program. The operator can realize the one-key unhooking and hooking actions through the monitoring in the control room, so as to realize the stable connection between the traction mechanism and the adapter 1 and realize the traction of the ingot mold car.

[0048] There are three control modes for the operation mode, namely the manual mode, the remote PLC control mode, and the remote control mode. The centralized control operation console is provided with a mode conversion switch knob for realizing the switching of the three control modes. When using, rotating the mode switch button can realize the switching of the operation mode. The specific implementation processes of the three control modes are as follows:

[0049] In manual mode, it is controlled by the buttons on the on-site operation box, and the remote control and the remote controller are invalid. There are two control buttons, namely "hook opened in place" and "hook closed in place", on the operation box. When hooking, when the hook approaches the adapter 1, the operator presses the "hook opened in place" control button to fully open the hook. When the protrusion of the adapter 1 welded on the ingot mold cart completely enters the opened hook, the operator releases the "hook opened in place" button and then presses the "hook closed in place" button to hook the hook onto the adapter 1. After the two are fully combined, the operator releases the "hook closed in place" button to complete the stable connection between the traction mechanism and the adapter 1, facilitating the next step of realizing the traction operation of the ingot mold cart;

[0050] After the traction is completed and unhooking is required, the operator presses the "hook opened in place" control button to fully open the hook. When the protrusion of the adapter 1 welded on the ingot mold cart completely disengages from the opened hook, the operator releases the "hook opened in place" button and then presses the "hook closed in place" button to fully close the hook, completing the disconnection between the traction mechanism and the adapter 1.

[0051] In the remote PLC mode, it is automatically controlled by the PLC of the centralized control operation console, and the manual control and the remote controller are invalid. With the program pre-set by PLC programming, when hooking is required, the position of the traction mechanism is detected by the proximity switch device installed on the adapter 1. When the adapter 1 on the ingot mold cart runs to the corresponding position, the hook installed on the traction mechanism automatically opens. When the protrusion of the adapter 1 welded on the ingot mold cart completely enters the opened hook, after the proximity switch device installed on the adapter 1 detects that the adapter 1 has reached the position, it sends a feedback signal to the control system. At this time, the hook installed on the traction mechanism automatically closes to complete the stable connection between the traction mechanism and the adapter 1, facilitating the next step of realizing the traction operation of the ingot mold cart.

[0052] It should be noted that for safety considerations, the remote PLC mode does not set a program for the automatic unhooking of the traction mechanism when unhooking is required.

[0053] In the remote controller mode, it is controlled by the momentary action of the handheld remote controller, and the manual control and the remote PLC control are invalid. There are two control buttons, namely "hook opened in place" and "hook closed in place", on the remote controller, and a transmitting device is set at the remote control transmitting end, and a receiver is set near the hook. When hooking, the operator can operate the remote controller at any position convenient for operation. When hooking is required, the operator makes the adapter 1 approach the hook and presses the "hook opened in place" control button on the remote controller to fully open the hook. When the protrusion of the adapter 1 welded on the ingot mold cart completely enters the opened hook, the operator releases the "hook opened in place" button and then presses the "hook closed in place" button to hook the hook onto the adapter 1. After the two are fully combined, the operator releases the "hook closed in place" button to complete the stable connection between the traction mechanism and the adapter 1, facilitating the next step of realizing the traction operation of the ingot mold cart;

[0054] After the traction is completed and the hook needs to be disengaged, the operator presses the open-in-place control button on the remote control to fully open the hook. When the protrusion of the connecting body 1 welded to the ingot mold car completely disengages from the opened hook, the operator releases the open-in-place button and then presses the close-in-place button to fully close the hook, completing the disengagement of the traction mechanism and the connecting body 1.

[0055] It should be noted that the operator uses the control system, precisely controls through PLC programming, and cooperates with the monitoring screen for real-time monitoring to achieve remote one-key operation. The three modes can be switched flexibly and can be controlled according to actual needs, which is safe and convenient.

[0056] The above embodiments are only for illustrating the technical concept and characteristics of the present invention, and the purpose is to enable those who are familiar with this technology to understand the content of the present invention and implement it accordingly, and it cannot be used to limit the protection scope of the present invention. Any equivalent transformation or modification made according to the spirit and essence of the present invention should be covered within the protection scope of the present invention.

Claims

1. A traction mechanism, comprising a hook mechanism, a connecting mechanism and a driving mechanism, characterized in that: The hook mechanism comprises a first hook and a second hook, wherein the first hook and the second hook are connected to each other via a fixed pin; The connecting mechanism comprises a first connecting rod, a second connecting rod, a first connecting pin, a second connecting pin, a sliding pin and a connecting rod connecting block; the first end of the first connecting rod is connected to the first hook via the first connecting pin, the first end of the second connecting rod is connected to the second hook via the second connecting pin, and the second end of the first connecting rod and the second end of the second connecting rod are connected to each other via the sliding pin; Limiting plates are arranged on both sides of the connecting rod connection block. The first end of the connecting rod connection block is connected to the sliding pin shaft, and the second end is connected to the driving mechanism.

2. A traction mechanism according to claim 1, characterized in that: The traction mechanism also includes an upper fixed panel, a lower fixed panel, a first positioning plate, a second positioning plate and a rear positioning plate; the upper fixed panel is arranged at the top end of the plane where the traction hook is located, the lower fixed panel is arranged at the bottom end of the plane where the traction hook is located, and the first positioning plate, the second positioning plate and the rear positioning plate are arranged between the upper fixed panel and the lower fixed panel.

3. A traction mechanism according to claim 2, characterized in that: The driving mechanism comprises an electro-hydraulic push rod, a first latch and a second latch, wherein the first end of the electro-hydraulic push rod is connected to the connecting rod connecting block via the first latch; and the second end of the electro-hydraulic push rod is connected to the rear positioning plate via the second latch.

4. A traction mechanism according to claim 2, characterized in that: The first hook and the second hook are respectively provided with rolling bodies; the upper fixed panel is provided with a first limit switch and a second limit switch.

5. A traction mechanism according to claim 2, characterized in that: The first positioning plate, the second positioning plate and the rear positioning plate are fixedly connected to the upper fixed panel and the lower fixed panel via bolts, elastic washers and flat washers in sequence.

6. A control system, characterized in that: The traction mechanism applied to any one of claims 1 to 5 comprises an operation box, a centralized control console and a remote controller, wherein the centralized control console is connected to the traction mechanism, the operation box is connected to the centralized control console, the operation box is provided with two control buttons for hook opening and hook closing, respectively, and the remote controller is provided with two control buttons for hook opening and hook closing; the remote controller is provided with a transmitting device, and the traction mechanism is provided with a receiver.

7. The control system according to claim 6, characterized in that: The centralized control console is provided with a mode conversion switch knob, and the control system has three control modes: manual mode, remote PLC control mode and remote control mode, and only one of the modes can be enabled at the same time.

8. An operating method, characterized in that: Applicable to the control system described in any one of claims 6-7, in manual mode, the remote PLC control mode and the remote control mode are invalid, the hook is fully opened by pressing the open position control button, and the hook is fully closed by pressing the closed position control button.

9. An operating method, characterized in that: Applied to the control system described in any one of claims 6-7, in the remote PLC control mode, the centralized control console is automatically controlled by PLC, the manual mode and the remote control mode are invalid, the control system detects the position of the tractor through the first limit switch and the second limit switch, and sends a feedback signal after detecting that it has reached the limit switch position, and after receiving the feedback signal, the control system performs the operation of opening or closing the hook according to the feedback signal.

10. An operating method, characterized in that: Applicable to the control system described in any one of claims 6-7, in the remote control mode, the manual mode and the remote PLC control mode are invalid; the hook is fully opened by pressing the open position control button on the remote control, and the hook is fully closed by pressing the closed position control button.

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