A self-locking device for a ladle cover system

Abstract

The utility model relates to the ladle field discloses a self locking device for ladle cover system, including the top frame, the bottom fixed connection of top frame has the hook, the outer wall of hook is provided with the self locking mechanism, the self locking mechanism includes the connecting seat, the outer wall fixed connection of connecting seat is in the outer wall of hook, the outer wall fixed connection of connecting seat has the bearing plate, the inner wall rotationally connected of bearing plate has the hinged axle, the outer wall of hinged axle is equipped with the control board, the both sides outer wall of control board is fixedly connected with the protective sleeve respectively, two protective sleeves are symmetrically set up, in the utility model, through memory alloy and scroll spring cooperation, the deformation of memory alloy is triggered because of environmental temperature rise when hoisting, pushes the control board and closes the hook opening, realizes automatic and reliable self locking, effectively avoids the risk that the lifting lug falls off in the hoisting of ladle cover, promotes operation safety.

Description

Technical Field

[0001] This utility model relates to the field of steel ladles, and in particular to a self-locking device for a steel ladle cover system. Background Technology

[0002] In metallurgical production, the ladle is a key piece of equipment for holding and transferring molten steel. The stable opening and closing of the ladle cover and its safe hoisting are directly related to production efficiency and operational safety. To ensure a stable connection of the ladle cover during hoisting and to prevent the cover from shaking or falling off, the ladle cover system is usually equipped with a self-locking device. This device is the core component that ensures a reliable connection between the ladle cover and the hoisting equipment.

[0003] In existing technologies, the self-locking devices of ladle cover systems mostly use mechanical latches, manual pins, or simple elastic structures to achieve the locking function. In actual operation, the operator usually needs to manually engage the latch with the ladle cover lifting lug before hoisting, or rely on the weight of the lifting lug itself to press the elastic component to complete the initial locking. After hoisting, the locking state is released manually to realize the cyclical loading and unloading of the ladle cover.

[0004] However, manual locking is prone to failure due to operator negligence, while locking methods relying on gravity or simple elastic structures are susceptible to locking failure when subjected to external forces such as ladle shaking or impact during hoisting. This can cause the ladle cover lifting lug to accidentally fall off the hook, affecting production continuity and posing a significant safety hazard. Therefore, a self-locking device for the ladle cover system is proposed to solve the above problems. Utility Model Content

[0005] To overcome the above deficiencies, this utility model provides a self-locking device for a ladle cover system, which aims to solve the problem of self-locking failure leading to the detachment of the lifting lugs in the prior art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a self-locking device for a steel ladle cover system, comprising a top frame, a hook fixedly connected to the bottom of the top frame, a self-locking mechanism provided on the outer wall of the hook, the self-locking mechanism comprising a connecting seat, the outer wall of the connecting seat fixedly connected to the outer wall of the hook, a bearing plate fixedly connected to the outer wall of the connecting seat, a hinge shaft rotatably connected to the inner wall of the bearing plate, and a control plate sleeved on the outer wall of the hinge shaft.

[0007] As a further description of the above technical solution: protective sleeves are fixedly connected to the two outer walls of the control board, and the two protective sleeves are arranged symmetrically.

[0008] As a further description of the above technical solution: the outer wall of the hinge shaft near both ends is provided with threads, and the hinge shaft is connected to a sealing cap through two threads, the outer wall of the sealing cap being in contact with the outer wall of the bearing plate.

[0009] As a further description of the above technical solution: two shape memory alloys are symmetrically fixedly connected to the outer wall of the hinge shaft, and the outer rings of the two shape memory alloys are respectively fixedly connected to the inner rings of the two protective sleeves.

[0010] As a further description of the above technical solution: the outer wall of the hook is fixedly connected to a first reinforcing plate, the first reinforcing plate is trapezoidal in shape, and the inclined outer wall of the first reinforcing plate is fixedly connected to the outer wall of the bearing plate.

[0011] As a further description of the above technical solution: the outer wall of the bearing plate is fixedly connected with a reinforcing rib plate.

[0012] As a further description of the above technical solution: a second reinforcing plate is fixedly connected to the outer wall of the hook, a third reinforcing plate is fixedly connected to the outer wall of the second reinforcing plate, and the outer wall of the third reinforcing plate is fixedly connected to the outer wall of the hook.

[0013] As a further description of the above technical solution: a spiral spring is fixedly connected to the outer wall of the hinge shaft, and the outer wall of the spiral spring is fixedly connected to the control plate.

[0014] This utility model has the following beneficial effects: 1. In this utility model, the shape memory alloy and the spiral spring work together. When the ambient temperature rises during hoisting, the shape memory alloy is triggered to deform, which pushes the control plate to close the hook opening, thus achieving automatic and reliable self-locking. This effectively avoids the risk of the lifting lug falling off during the hoisting of the ladle cover, improves the safety of the operation, and the protective sleeve covering the shape memory alloy prevents steel slag from splashing and sticking. Combined with the trapezoidal stress dispersion structure of the first reinforcing plate.

[0015] 2. In this utility model, the structural strength of components such as hooks and bearing plates is enhanced by the cooperation of the first reinforcing plate, the second reinforcing plate, the third reinforcing plate and the reinforcing rib plate, the lifting stress is dispersed, the deformation of components is prevented, the long-term stable operation of the self-locking mechanism is ensured, and the overall durability of the device is improved. Attached Figure Description

[0016] Figure 1 This is a front view of a self-locking device for a ladle cover system proposed in this utility model; Figure 2 This is a schematic diagram of the hook of a self-locking device for a ladle cover system proposed in this utility model; Figure 3 This utility model proposes a self-locking device for a ladle cover system. Figure 2 Enlarged view of point A in the middle; Figure 4 This is a schematic diagram of the hinge shaft of a self-locking device for a ladle cover system proposed in this utility model.

[0017] Legend: 1. Top frame; 2. Hook; 3. Control panel; 4. Connecting seat; 5. Bearing plate; 6. Hinge shaft; 7. Protective sleeve; 8. Thread; 9. Sealing cover; 10. Shape memory alloy; 11. First reinforcing plate; 12. Reinforcing rib plate; 13. Second reinforcing plate; 14. Third reinforcing plate; 15. Spiral spring. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Reference Figure 1 - Figure 3 This utility model provides an embodiment of a self-locking device for a ladle cover system, comprising a top frame 1. A hook 2 is fixedly connected to the bottom of the top frame 1 via a full welding process. The hook 2 has a "J"-shaped cross-section, and its hook head is hardened to improve wear resistance. A self-locking mechanism is provided on the outer wall of the hook 2 to automatically lock after the hook 2 hooks onto the ladle cover lifting lug, preventing the lug from falling off during lifting. The self-locking mechanism includes a connecting seat 4, the outer wall of which is fixedly connected to the outer wall of the hook 2. Anti-slip textures are provided on the contact surface between the connecting seat 4 and the hook 2 to enhance connection stability. The outer wall of the connecting seat 4 is fixedly connected to a bearing plate 5. The bearing plate 5 provides a stable support base for the hinge shaft 6 and can withstand the torque generated when the control plate 3 rotates, thus avoiding the self-locking function from being affected by deformation due to force. The inner wall of the bearing plate 5 is rotatably connected to the hinge shaft 6. The hinge shaft 6 provides a rotation fulcrum for the control plate 3, ensuring that the control plate 3 can rotate flexibly to open and close the opening of the hook 2. The outer wall of the hinge shaft 6 is fitted with the control plate 3. The control plate 3 can be rotated around the hinge shaft 6 to block the opening of the hook 2 in the locked state to prevent the lifting lug from falling out; and to open the opening in the unlocked state to facilitate the entry and exit of the lifting lug.

[0020] Reference Figure 2 - Figure 4Protective sleeves 7 are fixedly connected to the two outer walls of the control board 3. The two protective sleeves 7 are symmetrically arranged. The protective sleeves 7 can protect the connection between the shape memory alloy 10 and the control board 3, preventing external debris interference or mechanical collisions from causing connection failure. The outer wall of the hinge shaft 6 near both ends is provided with threads 8. The hinge shaft 6 is threadedly connected to a sealing cover 9 through the two threads 8. The sealing cover 9 can restrict the axial displacement of the hinge shaft 6, prevent it from falling out of the bearing plate 5, and at the same time reduce the entry of dust, steel slag, etc. into the rotating mating parts, ensuring the flexibility of the hinge shaft 6 rotation and sealing. The outer wall of the cover 9 contacts the outer wall of the bearing plate 5. Two shape memory alloys 10 are symmetrically fixedly connected to the outer wall of the hinge shaft 6. The outer rings of the two shape memory alloys 10 are respectively fixedly connected to the inner rings of the two protective sleeves 7. The shape memory alloys 10 can deform according to the change of ambient temperature. By pushing the protective sleeves 7, they drive the control plate 3 to rotate. This is the triggering component for realizing the self-locking function, which can ensure that the control plate 3 accurately completes the locking action. The shape memory alloys 10 are made of NiTiNb wide hysteresis material, and the phase change temperature is set to 55℃±5℃ to ensure that the radiation temperature during ladle hoisting can trigger the action.

[0021] Reference Figure 2 - Figure 4 The outer wall of the hook 2 is fixedly connected to a first reinforcing plate 11, which is trapezoidal in shape. The trapezoidal structure can disperse and transmit the force between the hook 2 and the bearing plate 5, enhancing the deformation resistance of the connection between the two and preventing loosening of the connection due to long-term stress. The inclined outer wall of the first reinforcing plate 11 is fixedly connected to the outer wall of the bearing plate 5, forming a triangular support structure, which further improves the installation stability of the bearing plate 5 and ensures that it does not shake when the control plate 3 is under force. The outer wall of the bearing plate 5 is fixedly connected to a reinforcing rib plate 12, which can enhance the structural strength of the bearing plate 5 itself, prevent it from bending and deforming when subjected to the torque of the control plate 3, and ensure the rotation accuracy of the hinge shaft 6. The outer wall of the hook 2 is fixedly connected to a second reinforcing plate 13. A third reinforcing plate 14 is fixedly connected. The second reinforcing plate 13 and the third reinforcing plate 14 cooperate with each other to disperse the stress of the hook 2 when it is under load, prevent the hook 2 from breaking due to excessive local stress, and improve the load-bearing capacity of the overall structure. The outer wall of the third reinforcing plate 14 is fixedly connected to the outer wall of the hook 2. A spiral spring 15 is fixedly connected to the outer wall of the hinge shaft 6. The outer wall of the spiral spring 15 is fixedly connected to the control plate 3. The spiral spring 15 can provide a reset spring force for the control plate 3. When the memory alloy 10 is released from the trigger state, it drives the control plate 3 back to the open position, so that the device can repeatedly realize the locking and unlocking cycle. The two ends of the memory alloy 10 are fixed to the inner wall of the hinge shaft 6 and the protective sleeve 7 by laser welding. The outer end of the spiral spring 15 is embedded in the groove of the side wall of the control plate 3 to achieve circumferential fixation.

[0022] Working principle: When the ladle cover system starts working with the self-locking device, hook 2 engages with the lifting lug of the ladle cover. Under normal ambient temperature, shape memory alloy 10 is in its initial state, and the spiral spring 15 keeps the control plate 3 in a relatively open position, which does not hinder the engagement operation of hook 2 and lifting lug. During the hoisting of the ladle, if the ambient temperature rises to the phase transformation temperature of shape memory alloy 10, shape memory alloy 10 deforms, and the force generated is transmitted to the control plate 3 through the protective sleeve 7, causing the control plate 3 to rotate around the hinge shaft 6. During the rotation of the control plate 3, it gradually moves towards the opening of the hook 2 until it completely covers the opening of the hook 2, thus locking the lifting lug and preventing it from coming off the hook 2 during hoisting. After the hoisting is completed, the ladle returns to the normal temperature environment, the shape memory alloy 10 returns to its initial state, and the spiral spring 15 releases its elastic potential energy, driving the control plate 3 to rotate in the opposite direction, causing the control plate 3 to leave the opening of the hook 2 and releasing the locking of the lifting lug, making it easier to remove the ladle cover. Throughout the entire operation, the reinforcing plates (first reinforcing plate 11, second reinforcing plate 13, third reinforcing plate 14 and reinforcing rib plate 12) work together to enhance the structural strength of components such as the hook 2 and the bearing plate 5, ensuring that the device can withstand the impact force and the weight of the ladle during hoisting, ensuring the stable operation of the self-locking mechanism, and avoiding the impact of component deformation on the realization of the self-locking function.

[0023] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A self-locking device for a ladle shroud system, comprising a top frame (1), characterized in that: The bottom of the top frame (1) is fixedly connected to a hook (2), and the outer wall of the hook (2) is provided with a self-locking mechanism; The self-locking mechanism includes a connecting seat (4), the outer wall of which is fixedly connected to the outer wall of the hook (2), a bearing plate (5) is fixedly connected to the outer wall of the connecting seat (4), a hinge shaft (6) is rotatably connected to the inner wall of the bearing plate (5), and a control plate (3) is sleeved on the outer wall of the hinge shaft (6).

2. A self locking device for a ladle shroud system as claimed in claim 1, wherein: The control board (3) has protective sleeves (7) fixedly connected to its two outer walls respectively, and the two protective sleeves (7) are arranged symmetrically.

3. A self locking device for a ladle shroud system as claimed in claim 1, wherein: The hinge shaft (6) has threads (8) on its outer wall near both ends. The hinge shaft (6) is threaded to a sealing cap (9) through two threads (8). The outer wall of the sealing cap (9) is in contact with the outer wall of the bearing plate (5).

4. A self locking device for a ladle shroud system as claimed in claim 1, wherein: Two shape memory alloys (10) are symmetrically fixed to the outer wall of the hinge shaft (6), and the outer rings of the two shape memory alloys (10) are respectively fixed to the inner rings of the two protective sleeves (7).

5. A self locking device for a ladle shroud system as claimed in claim 1, wherein: The hook (2) is fixedly connected to the outer wall of a first reinforcing plate (11), which is trapezoidal in shape, and the inclined outer wall of the first reinforcing plate (11) is fixedly connected to the outer wall of the bearing plate (5).

6. A self locking device for a ladle shroud system as claimed in claim 1, wherein: The outer wall of the bearing plate (5) is fixedly connected with a reinforcing rib plate (12).

7. A self locking device for a ladle shroud system as claimed in claim 1, wherein: The hook (2) is fixedly connected to the outer wall of a second reinforcing plate (13), and the outer wall of the second reinforcing plate (13) is fixedly connected to a third reinforcing plate (14). The outer wall of the third reinforcing plate (14) is fixedly connected to the outer wall of the hook (2).

8. A self locking device for a ladle shroud system as claimed in claim 1, wherein: A spiral spring (15) is fixedly connected to the outer wall of the hinge shaft (6), and the outer wall of the spiral spring (15) is fixedly connected to the control plate (3).

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