Hydraulic drive clamp device for steel ingot hoisting

Abstract

The utility model relates to the technical field of steel ingot hoisting in the steel production process, in particular to a hydraulic drive clamp device for steel ingot hoisting. The fixed hanging bracket can be hung on a crane hook, and the rotary hanging bracket is installed at the bottom of the fixed hanging bracket and rotationally connected with the fixed hanging bracket. The hydraulic cylinder is installed on the rotary hanging bracket, a piston rod of the hydraulic cylinder is vertically arranged, and a cylinder base is located at the bottom end. The two guide groove frames are symmetrically and fixedly connected to the two sides of the rotary hanging bracket, and guide grooves are formed in the guide groove frames. The middle parts of the two clamps are hinged together through a clamp pin shaft; a roller is arranged at the upper end of the clamp and mounted in the guide groove, and a jaw is arranged at the lower end of the clamp; the cylinder base is connected with the clamp pin shaft, the cylinder base moves upwards, the jaw is opened, the cylinder base moves downwards, and the jaw is closed for clamping. On the basis of gravity clamping, the thrust of the hydraulic cylinder acts on clamping of the steel ingot at the same time, the bearing capacity is large, steel ingot clamping is safe and reliable, and the dead weight is light.

Description

Technical Field

[0001] This utility model relates to the field of steel ingot hoisting technology in the steel production process, specifically a hydraulically driven clamping device for hoisting steel ingots. Background Technology

[0002] In the steel production process, to ensure safety and improve the gripping and lifting speed, clamp-type fixtures (clamping devices) are often used to grip red-hot steel ingots. Due to the high operating speed, large vibration, and the fact that the clamped ingots are often red-hot, each component of the clamping device must not only have sufficient strength but also good clamping performance. Therefore, the clamping devices are relatively large in size and weight. Their basic forms are screw clamping type and self-weight clamping type.

[0003] The initial clamping force and clamping coefficient of screw clamping clamps can be designed as needed, making them relatively reliable. However, they are large in size and weight, and have a complex structure, making them difficult to process and maintain. Therefore, few companies use them.

[0004] Gravity-based clamps have a simple structure and are easy to manufacture and maintain, making them widely used in many metallurgical plants in China. However, their clamping force is determined by the weight of the clamp itself and the weight of the steel ingot. The initial clamping force is relatively small, making operation unsafe, and the steel ingot can easily fall out of the jaws. The inertia caused by weightlessness can damage the transmission chain, and the falling steel ingot can damage the equipment and affect production flow and product quality. Moreover, when using the clamps to grip the steel ingot, the jaws have a large range of movement, requiring operators to have a high level of skill. If operated improperly, the descending jaws may not be aligned with the steel ingot, causing it to disengage and resulting in a significant impact on the guide rail frame, often leading to breakage of the lower part of the guide rail frame. Utility Model Content

[0005] To overcome the shortcomings of the existing technology, this utility model provides a hydraulically driven clamping device for lifting steel ingots. Based on gravity clamping, the thrust of the hydraulic cylinder acts simultaneously on the clamping of the steel ingot, which has a large load-bearing capacity, is safe and reliable in clamping the steel ingot, and is lightweight.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A hydraulically driven clamping device for lifting steel ingots includes a fixed hanger, a rotating hanger, a hydraulic cylinder, clamps, and guide rails. The fixed hanger can be suspended from a crane hook, and the rotating hanger is installed at the bottom of the fixed hanger and rotatably connected to it. The hydraulic cylinder is installed on the rotating hanger, with its piston rod vertically positioned and its base located at the bottom. Two guide rails are symmetrically fixed to both sides of the rotating hanger, and each guide rail has a guide groove. The two clamps are symmetrically arranged and hinged together at the middle by a clamping pin. The upper end of the clamp has a roller installed in the guide groove, and the lower end of the clamp has jaws. The cylinder base is connected to the clamping pin; when the cylinder base moves upward, the jaws open, and when the cylinder base moves downward, the jaws close and clamp.

[0008] Furthermore, it also includes a hook clamp, one end of which is connected to a fixed hanger and the other end is connected to the frame of the crane hook. The hook clamp prevents the device from rotating with the hook of the crane hook.

[0009] Furthermore, it also includes an anti-detachment pin, which is installed on a fixed hanger to secure the crane hook and prevent it from detaching.

[0010] Furthermore, it also includes a hydraulic oil station and a hydraulic control valve assembly, which are connected to the hydraulic cylinder pipeline.

[0011] Furthermore, it also includes an external gear slewing support bearing and a hydraulic slewing reducer. The slewing hanger and the fixed hanger are rotatably connected through the external gear slewing support bearing. The hydraulic slewing reducer is connected to the external gear slewing support bearing, and the hydraulic slewing reducer drives the slewing hanger to rotate.

[0012] Furthermore, the hydraulic oil station, hydraulic control valve group, and hydraulic rotary reducer pipeline are connected.

[0013] Furthermore, it also includes a heat-insulating protective cover, which is fixed to a fixed hanger and covers the outside of the hydraulic oil station, hydraulic rotary reducer, hydraulic cylinder and hydraulic control valve group.

[0014] Furthermore, the fixed hanger includes a vertical plate, a lifting pin, and an upper connecting flange; the vertical plate is vertically arranged and fixed to the upper surface of the upper connecting flange, and the lifting pin is fixed to the upper end of the vertical plate.

[0015] Furthermore, the slewing hanger includes a hollow tube and a lower connecting flange; the hollow tube is arranged vertically and is fixedly connected to the lower surface of the lower connecting flange.

[0016] Furthermore, it also includes a cooling fan, which is installed inside the fixed bracket.

[0017] Compared with the prior art, the present invention has at least the following technical effects or advantages:

[0018] 1. This utility model includes a hydraulic cylinder. The cylinder base is connected to the clamp pin. When the cylinder base moves upward, the jaws open; when the cylinder base moves downward, the jaws close and clamp. Under the combined action of the clamping force of the hydraulic cylinder, the clamp, and the weight of the steel ingot, the steel ingot is firmly clamped. Furthermore, the force in the downward direction of the hydraulic cylinder is aligned with the direction of gravity of the steel ingot and the device, collectively forming the clamping force of the steel ingot. This ensures that the clamping coefficient K of this device (clamp) is sufficiently large. Even if the hydraulic system malfunctions, the steel ingot can still be clamped by its own weight, preventing it from falling off. The clamping of the steel ingot is safe and reliable. Additionally, the damping effect of the hydraulic cylinder's oil circuit ensures that the device will not experience weightlessness or impact. The hydraulic drive torque can be freely adjusted within a certain range by adjusting the hydraulic system pressure. The hydraulic cylinder has strong lifting and overload capacity, eliminating the need for end-point limit and overload protection devices. Therefore, the mechanism is simple, lightweight, and has a low failure rate.

[0019] 2. This utility model is equipped with a hook clamping component and an anti-detachment pin. The hook clamping component prevents the device from rotating freely with the hook of the crane. The anti-detachment pin fixes the hook to the fixed hanger to prevent detachment.

[0020] 3. This utility model also includes a hydraulic rotary reducer, which is a fully hydraulic drive device. The hydraulic rotary reducer drives the rotary hanger to rotate. The rotation speed of the rotary hanger can be precisely controlled through the hydraulic control valve group, and the hydraulic cylinder can be controlled to adjust the clamping fluid pressure and speed.

[0021] 4. This utility model's heat-insulating protective cover is placed outside the hydraulic oil station, hydraulic rotary reducer, hydraulic cylinder, and hydraulic control valve group to provide heat insulation protection for the device's rotation, clamping, and hydraulic components. This prevents the device from being burned by high temperatures, allowing it to be used in high ambient temperatures and enabling the safe and rapid handling of red-hot steel ingots in high-temperature furnaces.

[0022] 5. This utility model is equipped with a cooling fan, using forced air cooling for auxiliary cooling. This reduces the risk of burns from high temperatures, allowing the device to be used in high ambient temperatures and enabling the safe and rapid handling of red-hot steel ingots within a high-temperature furnace. Attached Figure Description

[0023] Figure 1 This is a schematic front view of the structure of this utility model.

[0024] Figure 2 This is a schematic side view of the structure of this utility model.

[0025] Figure 3 This is a schematic front view of the hook clamping component structure of this utility model.

[0026] Figure 4 This is a schematic side view of the hook clamping component structure of this utility model.

[0027] Figure 5 This is a schematic front view of the fixed hanger structure of this utility model.

[0028] Figure 6 This is a schematic side view of the fixed hanger structure of this utility model.

[0029] Figure 7 This is a schematic front view of the rotating hanger structure of this utility model.

[0030] Figure 8 This is a schematic side view of the rotating hanger structure of this utility model.

[0031] In the diagram: 1. Crane hook; 2. Hook clamp; 3. Fixed hanger; 4. Anti-detachment pin; 5. Hydraulic oil station; 6. Hydraulic control valve group; 7. Hydraulic rotary reducer; 8. Cooling fan; 9. Hydraulic rotary joint; 10. External gear rotary support bearing; 11. Hydraulic cylinder; 12. Hollow tube; 13. Guide rail frame; 14. Roller; 15. Clamp pin; 16. Clamp; 17. Jaw; 18. Rotary hanger; 19. Protective cover; 20. Lower connecting flange; 31. Vertical plate; 32. Lifting pin; 33. Upper connecting flange. Detailed Implementation

[0032] The embodiments of this utility model are described in detail below. To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this utility model or its application or use. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0033] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0034] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0035] In the description of this utility model, it should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this utility model. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0036] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0037] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0038] like Figure 1-8 As shown, this utility model is a hydraulically driven clamping device for lifting steel ingots. This utility model utilizes a 75-ton bridge crane on site, and without changing the original crane's function, hooks the device onto the crane hook 1. The device includes a fixed lifting frame 3, a hydraulic rotary reducer 7, a rotary lifting frame 18, a hydraulic cylinder 11, a clamp 16, a guide rail frame 13, a cooling fan 8, and a heat-insulating protective cover 19.

[0039] The fixed hanger 3 includes two vertical plates 31, a lifting pin 32, and an upper connecting flange 33. The two vertical plates 31 are vertically arranged, parallel to each other, and vertically fixed to the upper surface of the upper connecting flange 33. The lifting pin 32 is fixed to the upper end of the vertical plates 31 and located between the two vertical plates 31. The fixed hanger 3 is hung on the hook head of the crane hook 1 via the lifting pin 32.

[0040] This invention utilizes the lever principle by adding a hook clamp 2 on each side of the upper end of the fixed hanger 3. The bottom end of the hook clamp 2 is connected to the fixed hanger 3, and the top end of the hook clamp 2 is connected to the frame of the crane hook 1. When the hook head of the crane hook 1 hangs on this device, the hook head presses against the hook clamp 2 in the width direction, locking the frame of the crane hook 1 and preventing the device from rotating freely with the hook head of the crane hook 1. An anti-detachment pin 4 is installed in the middle of the vertical plate 31 to fix the crane hook 1 and prevent it from detaching.

[0041] The slewing hanger 18 includes a hollow tube 12 and a lower connecting flange 20. The hollow tube 12 is a hollow steel pipe, which is vertically installed and fixed to the center of the lower surface of the lower connecting flange 20. Two guide rail brackets 13 are fixed to both sides of the hollow tube 12, and the guide rail brackets 13 are provided with guide rails.

[0042] The inner ring of the external gear slewing bearing 10 is bolted to the upper connecting flange 33 of the fixed hanger 3. The outer gear ring of the bearing is bolted to the lower connecting flange 20 of the slewing hanger 18. The external gear slewing bearing 10 is driven by the hydraulic slewing reducer 7 fixed to the side of the fixed hanger 3, which drives the slewing hanger 18 to perform circumferential motion, thus completing the rotation of this device.

[0043] The hydraulic oil station 5, hydraulic control valve group 6, hydraulic rotary reducer 7, and cooling fan 8 are respectively installed on the upper surface of the upper connecting flange 33 of the fixed hanger 3. The hydraulic oil station 5, hydraulic control valve group 6, hydraulic cylinder 11, and hydraulic rotary reducer 7 are connected by pipelines. The high-pressure oil output from the hydraulic oil station 5 is supplied to the hydraulic rotary motor through the hydraulic control valve group 6, which drives the hydraulic rotary reducer 7 to rotate. The power is transmitted to the external gear rotary support bearing 10 through the reducer pinion, realizing the free rotation of the rotary hanger 18 of this device.

[0044] The driving device of this clamp opening and closing mechanism adopts a vertically inverted hydraulic cylinder 11. The piston rod of the hydraulic cylinder is set vertically, and the cylinder base is located at the bottom. The cylinder base of the hydraulic cylinder 11 is connected to the middle of the clamp 16 through the clamp pin 15. The upper part of the clamp 16 is provided with rollers 14, which are installed in the guide groove of the guide slot frame 13. The lower part of the clamp 16 is provided with jaws 17. The piston rod of the hydraulic cylinder 11 is fixed to the upper end of the hollow tube 12 by a spherical flange. The hydraulic cylinder piston rod is a two-layer hollow steel tube structure, and a hydraulic rotary joint 9 is installed at the end, which is connected to the hydraulic control valve group 6 to form another hydraulic control circuit.

[0045] The extension and retraction of the hydraulic cylinder causes the clamp 16 to move up and down, and the two rollers 14 above the clamp 16 move within the guide rail frame 13. The hydraulic cylinder 11 drives the clamp 16 to move upward, and the jaws 17 open; the hydraulic cylinder 11 drives the clamp 16 to move downward, and the jaws close to clamp the workpiece.

[0046] The hydraulic drive torque can be freely adjusted within a certain range by adjusting the hydraulic system pressure. The hydraulic cylinder has a strong lifting and overload capacity, eliminating the need for additional end-point limit and overload protection devices. Therefore, the mechanism is simple, lightweight, and has a low failure rate. Furthermore, the force in the descent direction of the hydraulic cylinder is aligned with the direction of gravity of the steel ingot and the device, jointly forming the clamping force on the steel ingot. This ensures that the clamping coefficient K of the device is sufficiently large. Even if the hydraulic system fails, the steel ingot can be clamped by its own weight, preventing it from falling off. The clamping of the steel ingot is safe and reliable. Additionally, the damping effect of the hydraulic cylinder's oil circuit ensures that the clamp will not experience weightlessness or impact. When the clamp is working inside the soaking furnace, if the lifting mechanism fails, the opening and closing mechanism can lift the device away from the high-temperature environment.

[0047] The heat insulation protective cover 19 is fixedly connected to the fixed hanger 3. The heat insulation protective cover covers the outside of the hydraulic oil station 5, the hydraulic rotary reducer 7, the hydraulic cylinder 11 and the hydraulic control valve group 6, providing heat insulation protection for important components.

[0048] The cooling fan 8 is installed inside the fixed bracket 3 and uses forced air cooling for auxiliary cooling.

[0049] This device features a fully hydraulically operated clamp (16 clamps). In addition to gravity clamping, the thrust of the hydraulic cylinder simultaneously clamps the steel ingot, resulting in a higher clamping coefficient and safer, more reliable clamping. The hollow piston rod hydraulic cylinder, used in conjunction with a rotary joint, allows the clamp's opening and closing power unit to rotate freely around its axis without restriction. The hydraulic clamping force and clamp opening / closing speed are continuously adjustable within a fixed range by adjusting the hydraulic system pressure and flow rate, making adjustment simple and convenient. It eliminates the need for torque limiting protection devices and safety features such as limit switches, effectively reducing the weight of the lifting device and increasing its load-bearing capacity. Forced air cooling and effective heat insulation reduce the risk of burns to the hydraulic system from high temperatures, allowing for use in high-temperature environments. It can safely and quickly clamp red-hot steel ingots inside high-temperature furnaces.

[0050] The above embodiments are implemented based on the technical solution of this utility model, providing detailed implementation methods and specific operation processes. However, the protection scope of this utility model is not limited to the above embodiments. Unless otherwise specified, the methods used in the above embodiments are conventional methods.

Claims

1. A hydraulically driven clamping device for lifting steel ingots, characterized in that: Includes fixed hangers, rotary hangers, hydraulic cylinders, clamps, and guide rails; The fixed hanger can be suspended on the crane hook, and the slewing hanger is installed at the bottom of the fixed hanger and is rotatably connected to the fixed hanger; The hydraulic cylinder is mounted on a rotary hanger, with the piston rod of the hydraulic cylinder set vertically and the cylinder base located at the bottom. The two guide rail frames are symmetrically fixed to both sides of the rotary hanger, and the guide rail frames are provided with guide rails. The two clamps are symmetrically arranged and hinged together in the middle by a clamp pin; the upper end of the clamp is provided with a roller, which is installed in a guide groove, and the lower end of the clamp is provided with jaws. The cylinder base is connected to the clamp pin. When the cylinder base moves upward, the jaws open; when the cylinder base moves downward, the jaws close and clamp.

2. The hydraulically driven clamping device for lifting steel ingots according to claim 1, characterized in that: It also includes a hook clamp, one end of which is connected to a fixed hanger and the other end is connected to the frame of the crane hook. The hook clamp prevents the device from rotating with the hook of the crane hook.

3. The hydraulically driven clamping device for lifting steel ingots according to claim 1, characterized in that: It also includes an anti-detachment pin, which is installed on a fixed hanger to secure the crane hook and prevent it from detaching.

4. The hydraulically driven clamp device for lifting steel ingots according to claim 1, characterized in that: It also includes a hydraulic oil station and a hydraulic control valve assembly, which are connected to the hydraulic cylinder pipeline.

5. The hydraulically driven clamp device for lifting steel ingots according to claim 4, characterized in that: It also includes an external gear slewing support bearing and a hydraulic slewing reducer. The slewing hanger and the fixed hanger are rotatably connected through the external gear slewing support bearing. The hydraulic slewing reducer is connected to the external gear slewing support bearing and drives the slewing hanger to rotate.

6. The hydraulically driven clamping device for lifting steel ingots according to claim 5, characterized in that: The hydraulic oil station, hydraulic control valve group and hydraulic rotary reducer pipeline are connected.

7. The hydraulically driven clamping device for lifting steel ingots according to claim 6, characterized in that: It also includes a heat insulation protective cover, which is fixed to a fixed hanger and covers the outside of the hydraulic oil station, hydraulic rotary reducer, hydraulic cylinder and hydraulic control valve group.

8. The hydraulically driven clamp device for lifting steel ingots according to claim 1, characterized in that: The fixed hanger includes a vertical plate, a lifting pin, and an upper connecting flange; the vertical plate is vertically arranged and fixed to the upper surface of the upper connecting flange, and the lifting pin is fixed to the upper end of the vertical plate.

9. The hydraulically driven clamp device for lifting steel ingots according to claim 1, characterized in that: The slewing hanger includes a hollow tube and a lower connecting flange; the hollow tube is vertically arranged and fixed to the lower surface of the lower connecting flange.

10. The hydraulically driven clamping device for lifting steel ingots according to claim 1, characterized in that: It also includes a cooling fan, which is installed inside a fixed bracket.

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