A cover uncovering device

Abstract

A kind of uncovering device for opening the tank cover of pickling tank, the uncovering device includes fixed frame, the drive component is provided on the fixed frame, the other end of the drive component is linked with rotating frame, and a plurality of connecting buckles for being fixedly connected with tank cover are arranged at intervals on the rotating frame.Several spaced connecting buckles are arranged on the rotating frame, the lifting point can be connected with tank cover in multiple points, and the force of each connecting buckle is distributed synchronously when opening the cover, so that the concentrated load of traditional single-point or few-point lifting rope is eliminated, and the distortion, deformation or damage of tank cover and steel structure due to local unbalanced stress is avoided.

Description

Technical Field

[0001] This utility model relates to a cover-opening device, belonging to the field of cover-opening devices. Background Technology

[0002] In steel smelting plants, especially in strip steel pickling units, the tank cover needs to be opened for each maintenance or troubleshooting of internal issues in the pickling tank. This allows for easy observation of the tank's interior and cleaning of sludge. A tank cover typically has two sets of lifting points near the end, with a considerable distance between them. To prevent deformation of the tank cover due to asynchronous movement of the lifting points during opening and closing, ropes are usually used to connect the lifting points. However, this results in the load acting on the steel structure during opening, making it susceptible to concentrated stress and damage. This can lead to delays in timely opening, impacting production efficiency and workflow. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings and deficiencies of the existing technology and to provide a cover-opening device.

[0004] A cap-opening device is disclosed for opening the cap of an acid pickling tank. The device includes a fixed frame with a drive component mounted on it. A rotating frame is linked to the other end of the drive component. The rotating frame has several interlocking buckles for fixed connection to the tank cap. The interlocking buckles on the rotating frame allow for simultaneous connection of lifting points to the tank cap at multiple points. During cap opening, the force on each buckle is distributed synchronously, eliminating the concentrated load of traditional single-point or few-point lifting ropes and preventing twisting, deformation, or damage to the tank cap and steel structure caused by localized force imbalance. The drive component and rotating frame are linked in an integrated design, requiring only a single drive operation during opening and closing, eliminating the need for multiple lifting ropes to coordinate, thus simplifying the maintenance process. Simultaneously, the rigid connection of the rotating frame ensures smooth and controllable opening and closing actions, improving operational safety. Without the need for manual simultaneous pulling of ropes at multiple points or repeated adjustment of lifting point positions, the tank cap can be opened and closed quickly, significantly shortening preparation time for maintenance and cleaning operations and improving overall production and maintenance efficiency.

[0005] Preferably, the rotating frame is quadrilateral in shape, and the connecting buckles are distributed along the length of the rotating frame on the upper and lower sides. The quadrilateral frame itself has good shape rigidity, which allows the rotating frame to maintain its shape without deformation when bearing the weight of the pickling tank cover and the opening and closing torque, thus improving the stability and reliability of the entire cover-opening device. The connecting buckles are evenly distributed along the upper and lower sides, which is equivalent to forming multi-point support on the four sides of the rotating frame, further dispersing the hanging load and making the force transmission more balanced. The connecting buckles arranged on the upper and lower sides can flexibly adjust the position of the fasteners according to pickling tank covers of different widths and shapes, and can be adapted to various specifications of tank covers without replacing the entire rotating frame.

[0006] Preferably, the rotating frame has two connecting rods on one side, and the fixed frame has a rotating shaft. The ends of the connecting rods are fixedly mounted on the rotating shaft, and a drive rod is fixedly mounted on the rotating shaft. The end of the drive rod is connected to the drive component. The two connecting rods drive the rotating frame through the same rotating shaft, causing the connecting buckles on the upper and lower sides to open and close synchronously. This eliminates the shaking and jamming caused by single-point drive or asynchronous multi-point ropes, ensuring smooth and consistent opening and closing actions. The bolt or pin fixing method of the rotating shaft to the connecting rods and drive rods allows for quick assembly and disassembly. During maintenance, only the corresponding fasteners need to be loosened to replace or lubricate the connecting rods or drive rods, making maintenance simple and efficient.

[0007] Furthermore, the connecting rod has a triangular cross-section. Compared to a circular or square cross-section of the same area, a triangular cross-section has a higher moment of inertia and torsional moment of inertia, which can more effectively resist bending and lateral torsional loads during opening and closing, ensuring that the connecting rod is not easily deformed.

[0008] Furthermore, the driving component is a driving cylinder. The cylinder itself has damping characteristics, which can produce a buffering effect at the beginning and end of the opening and closing stroke, reducing impact loads and vibrations, facilitating smooth opening and closing, and protecting structural components and power elements.

[0009] Preferably, the connecting buckle has a connecting hole, which is connected to the slot cover via a detachable pin. The detachable pin includes an inner connecting pin, an outer connecting pin, and a connecting cavity surrounding the outer side of the inner connecting pin at its bottom. A connecting sleeve is fixedly mounted on the inner connecting pin, and a snap-fit ​​part is provided inside the connecting cavity. The bottom of the snap-fit ​​part snaps into the connecting cavity via a snap-fit ​​block, and the other end extends out of the connecting cavity for snap-fit ​​connection with the connecting buckle. The connecting sleeve is connected to the snap-fit ​​block via a connecting rod. The detachable pin, through the action of pulling out the inner connecting pin, causes the snap-fit ​​block to retract into the connecting cavity and disengage from the connecting buckle. The action of pulling out the inner connecting pin causes the snap-fit ​​block to automatically retract and disengage, allowing the slot cover's connecting buckle and pin to separate quickly without additional tools, significantly shortening maintenance preparation and completion time. The pin, snap-fit ​​block, and connecting sleeve can be made entirely of corrosion-resistant materials resistant to acid washing environments, and the overall structure does not require exposed springs or complex mechanical devices, saving space and reducing the risk of corrosion damage.

[0010] Furthermore, a first connecting block is provided at the bottom of the locking part, and a second connecting block is provided on the connecting sleeve. The two ends of the connecting rod are respectively rotatably connected to the first connecting block and the second connecting block. Both ends of the connecting rod are hinged to the first and second connecting blocks, avoiding the sliding friction commonly found in linear push and pull, making the retraction action of the locking block smoother and more precise when the inner pin is pulled out, and reducing jamming and impact.

[0011] Furthermore, return springs are provided on both sides of the connecting cavity. One end of the return spring is fixedly connected to the locking block, and the other end is connected to the bottom of the connecting cavity. The return springs always push the locking block to the extended position, ensuring that the locking block can quickly and reliably return to the locked state after the inner connecting pin is pulled out, without the need for additional manual intervention or auxiliary devices. Even under vibration or uneven load, the return springs continuously apply restoring force to resist the tendency to loosen, keeping the locking block firmly locked in the connecting cavity, further preventing the pin from accidentally falling off during maintenance or operation.

[0012] Furthermore, the outer connecting pin is provided with spiral grooves distributed in a spiral shape, and the connecting buckle is provided with spiral protrusions that engage with the spiral grooves. After the spiral grooves and protrusions engage, the outer connecting pin can move axially along the spiral trajectory by rotating it, realizing semi-automatic locking and unlocking. The locking preload can be adjusted without additional tools, and it maintains a self-locking state after locking to prevent loosening. When the spiral engagement structure is subjected to vibration or impact, the protrusions engage in the grooves to form a mechanical stop, and radial friction alone is sufficient to resist loosening, further ensuring reliable locking under pickling vibration environment.

[0013] Furthermore, the inner connecting pin has a first pull ring at its end, and the outer connecting pin has a second pull ring at its end. The pull rings are integrally formed with or firmly connected to the pin shaft, making them difficult to detach or break. They can also be fitted with safety pins or safety ropes as needed to further prevent accidental detachment, providing double protection for the safety of maintenance personnel and equipment.

[0014] The beneficial effects of this utility model are as follows: The rotating frame is equipped with several spaced connecting buckles, allowing for simultaneous connection of the lifting points to the trough cover at multiple points. During opening, the force on each connecting buckle is distributed synchronously, eliminating the concentrated load of traditional single-point or few-point lifting ropes and preventing twisting, deformation, or damage to the trough cover and steel structure caused by localized force imbalance. The drive component is linked to the rotating frame, with an integrated structural design. The opening and closing process requires only a single drive operation, eliminating the need for multiple lifting ropes to coordinate, thus simplifying the maintenance process. Simultaneously, the rigid connection of the rotating frame ensures smooth and controllable opening and closing actions, improving operational safety. Without the need for manual simultaneous pulling of ropes at multiple points or repeated adjustment of the lifting point positions, the opening and closing of the trough cover can be completed quickly, significantly shortening preparation time for maintenance and cleaning operations and improving overall production and maintenance efficiency. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, obtaining other drawings based on these drawings without creative effort still falls within the scope of this utility model.

[0016] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a structural schematic diagram of the present invention from another angle; Figure 3 This is a structural diagram of a detachable pin. Figure 4 This is a cross-sectional view of the detachable pin. Figure 5 This is a structural diagram of the connecting buckle; In the diagram, 1. Fixed frame; 11. Rotating shaft; 2. Drive component; 3. Rotating frame; 31. Connecting buckle; 32. Connecting hole; 33. Spiral protrusion; 34. Connecting rod; 35. Drive rod; 4. Detachable pin; 5. Inner connecting pin; 51. Connecting sleeve; 52. Connecting rod; 53. Second connecting block; 54. First pull ring; 6. Outer connecting pin; 61. Connecting cavity; 62. Snap-fit ​​part; 63. Snap-fit ​​block; 64. First connecting block; 65. Return spring; 66. Spiral groove; 67. Second pull ring. Detailed Implementation

[0017] To make the objectives, technical solutions and advantages of this utility model clearer, the utility model will be described in further detail below with reference to the accompanying drawings.

[0018] It should be noted that all uses of "first" and "second" in the embodiments of this utility model are for the purpose of distinguishing two entities or parameters with the same name but different names. It is clear that "first" and "second" are only for the convenience of expression and should not be construed as limiting the embodiments of this utility model. Subsequent embodiments will not explain this in detail.

[0019] The directional and positional terms used in this utility model, such as "up," "down," "front," "back," "left," "right," "inner," "outer," "top," "bottom," and "side," are merely for reference to the accompanying drawings. Therefore, the directional and positional terms used are for the purpose of explaining and understanding this utility model, and not for limiting the scope of protection of this utility model.

[0020] like Figure 1-5The illustration shows an embodiment of a cap-opening device of this utility model, used to open the cap of an acid pickling tank. The cap-opening device includes a fixed frame 1, on which a driving component 2 is mounted. A rotating frame 3 is linked to the other end of the driving component 2. The rotating frame 3 has several connecting buckles 31 spaced apart for fixed connection with the tank cap. The spaced connecting buckles 31 on the rotating frame 3 allow for simultaneous connection of multiple lifting points to the tank cap. During cap opening, the force on each connecting buckle 31 is distributed synchronously, eliminating the concentrated load of traditional single-point or few-point lifting ropes and preventing twisting, deformation, or damage to the tank cap and steel structure due to localized force imbalance. The driving component 2 and the rotating frame 3 are linked, forming an integrated structure. The opening and closing process requires only a single driving operation, eliminating the need for multiple lifting ropes to coordinate, simplifying the maintenance process. Simultaneously, the rigid connection of the rotating frame 3 ensures smooth and controllable opening and closing actions, improving operational safety. Without the need for manual simultaneous pulling of ropes at multiple points or repeated adjustment of lifting point positions, the opening and closing of the tank cover can be completed quickly, significantly shortening the preparation time for maintenance and cleaning operations and improving the overall efficiency of production and maintenance.

[0021] The rotating frame 3 is quadrilateral in shape, and the connecting buckles 31 are distributed along the length of the rotating frame 3 on the upper and lower sides. The quadrilateral frame itself has good shape rigidity, which allows the rotating frame 3 to maintain its shape without deformation when bearing the weight of the pickling tank cover and the opening and closing torque, thus improving the stability and reliability of the entire cover opening device. The connecting buckles 31 are evenly distributed along the upper and lower sides, which is equivalent to forming multi-point support on the four sides of the rotating frame 3, further dispersing the hanging load and making the force transmission more balanced. The connecting buckles 31 arranged on the upper and lower sides can flexibly adjust the position of the fasteners according to pickling tank covers of different widths and shapes, and can be adapted to various specifications of tank covers without replacing the entire rotating frame 3.

[0022] Two connecting rods 34 are provided on one side of the rotating frame 3. A rotating shaft 11 is provided on the fixed frame 1. The ends of the connecting rods 34 are fixedly installed on the rotating shaft 11. A drive rod 35 is fixedly installed on the rotating shaft 11. The end of the drive rod 35 is connected to the drive component 2. The two connecting rods 34 drive the rotating frame 3 through the same rotating shaft 11, so that the connecting buckles 31 on the upper and lower sides open and close synchronously. This eliminates the shaking and jamming caused by single-point drive or asynchronous multi-point ropes, ensuring smooth and consistent opening or closing actions. The bolt or pin fixing method of the rotating shaft 11 to the connecting rods 34 and drive rod 35 makes assembly and disassembly quick. During maintenance, only the corresponding fasteners need to be loosened to replace or lubricate the connecting rods 34 or drive rod 35, making maintenance simple and efficient.

[0023] The connecting rod 34 has a triangular cross-section. Compared with a circular or square cross-section of the same cross-sectional area, the triangular cross-section has a higher moment of inertia and torsional moment of inertia, which can more effectively resist bending and lateral torsional loads during opening and closing, ensuring that the connecting rod 34 is not easily deformed.

[0024] The driving component 2 is a driving cylinder. The cylinder itself has damping characteristics, which can produce a buffering effect at the beginning and end of the opening and closing stroke, reducing impact load and vibration, which is conducive to smooth opening and closing and protects structural components and power components.

[0025] In the embodiments of this application, unlike the above embodiments, the connecting buckle 31 is provided with a connecting hole 32. The connecting hole 32 is connected to the groove cover through a detachable pin 4. The detachable pin 4 includes an inner connecting pin 5. An outer connecting pin 6 is provided on the outer connecting pin 5. The bottom of the outer connecting pin 6 is provided with a connecting cavity 61 surrounding the outer side of the inner connecting pin 5. A connecting sleeve 51 is fixedly provided on the inner connecting pin 5. A snap-fit ​​part 62 is provided in the connecting cavity 61. The bottom of the snap-fit ​​part 62 is snapped into the connecting cavity 61 through a snap-fit ​​block 63. The other end extends out of the connecting cavity 61 for snap-fit ​​connection with the connecting buckle 31. The connecting sleeve 51 is connected to the snap-fit ​​block 63 through a connecting rod 52. The detachable pin 4 drives the snap-fit ​​block 63 to retract into the connecting cavity 61 and release the snap-fit ​​state from the connecting buckle 31 through the pull-out action of the inner connecting pin 5. By pulling out the inner connecting pin 5, the locking block 63 automatically retracts and disengages, allowing the connecting buckle 31 of the slot cover and the pin to separate quickly without additional tools, significantly shortening maintenance preparation and completion time. Components such as the pin, locking block 63, and connecting sleeve 51 can be made entirely of corrosion-resistant materials resistant to acid washing environments, and the overall structure eliminates the need for exposed springs or complex mechanical devices, saving space and reducing the risk of corrosion damage.

[0026] The bottom of the locking part 62 is provided with a first connecting block 64, and the connecting sleeve 51 is provided with a second connecting block 53. The two ends of the connecting rod 52 are respectively rotatably connected to the first connecting block 64 and the second connecting block 53. Both ends of the connecting rod 52 are hinged to the first and second connecting blocks 53, avoiding the sliding friction commonly found in linear push and pull, making the retraction action of the locking block 63 smoother and more precise when the inner pin is pulled out, and reducing jamming and impact.

[0027] The connecting cavity 61 is provided with return springs 65 on both sides. One end of the return spring 65 is fixedly connected to the locking block 63, and the other end is connected to the bottom of the connecting cavity 61. The return spring 65 always pushes the locking block 63 to the extended position, ensuring that the locking block 63 can quickly and reliably return to the locked state after the inner connecting pin 5 is pulled out, without the need for additional manual intervention or auxiliary devices. Even under vibration or uneven load, the return spring 65 continuously applies restoring force to resist the loosening tendency and keep the locking block 63 firmly locked in the connecting cavity 61, further preventing the pin from accidentally falling off during maintenance or operation.

[0028] The outer connecting pin 6 has spiral grooves 66 arranged in a spiral shape on its exterior, and the connecting buckle 31 has spiral protrusions 33 that engage with the spiral grooves 66. After the spiral grooves 66 and the protrusions engage, the outer connecting pin 6 can move axially along the spiral trajectory by rotating it, achieving semi-automatic locking and unlocking. The locking preload can be adjusted without additional tools, and it maintains a self-locking state after locking to prevent loosening. When subjected to vibration or impact, the spiral engagement structure forms a mechanical stop by the protrusions engaging in the grooves, resisting loosening solely through radial friction, further ensuring reliable locking under pickling vibration environments.

[0029] The inner connecting pin 5 is provided with a first pull ring 54 at its end, and the outer connecting pin 6 is provided with a second pull ring 67 at its end. The pull rings are integrally formed with the pin shaft or are firmly connected, making them difficult to fall off or break. They can also be fitted with safety pins or safety ropes as needed to further prevent accidental fall and provide double protection for the safety of maintenance personnel and equipment.

[0030] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model shall still fall within the scope of the present utility model.

[0031] Although the present invention has been described with reference to several specific embodiments, it should be understood that the present invention is not limited to the specific embodiments disclosed. The present invention is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Claims

1. A cover opening device for opening a tank cover of an acid tank, characterized by: The cover-opening device includes a fixed frame, a driving component on the fixed frame, a rotating frame linked to the other end of the driving component, and a plurality of connecting buckles for fixed connection with the slot cover are provided at intervals on the rotating frame. The connecting buckle is provided with a connecting hole, which is connected to the groove cover by a detachable pin. The detachable pin includes an inner connecting pin and an outer connecting pin. The bottom of the outer connecting pin is provided with a connecting cavity surrounding the outer side of the inner connecting pin. A connecting sleeve is fixedly provided on the inner connecting pin. A snap-fit ​​part is provided in the connecting cavity. The bottom of the snap-fit ​​part snaps into the connecting cavity through a snap-fit ​​block. The other end extends out of the connecting cavity for snap-fit ​​connection with the connecting buckle. The connecting sleeve is connected to the snap-fit ​​block through a connecting rod. The detachable pin causes the snap-fit ​​block to retract into the connecting cavity and disengage from the connecting buckle by pulling out the inner connecting pin.

2. The cover uncovering device according to claim 1, characterized in that: The rotating frame is quadrilateral in shape, and the connecting buckles are distributed along the length of the upper and lower sides of the rotating frame.

3. The cover uncovering device according to claim 1, characterized in that: Two connecting rods are provided on one side of the rotating frame, and a rotating shaft is provided on the fixed frame. The ends of the connecting rods are fixedly installed on the rotating shaft, and a drive rod is fixedly provided on the rotating shaft. The end of the drive rod is connected to the drive component.

4. The cover uncovering device according to claim 3, characterized in that: The cross-section of the connecting rod is triangular.

5. The cover uncovering device according to claim 1 or 3, characterized in that: The driving component is a driving cylinder.

6. The cover uncovering device according to claim 1, characterized in that: The bottom of the snap-fit ​​part is provided with a first connecting block, the connecting sleeve is provided with a second connecting block, and the two ends of the connecting rod are respectively rotatably connected to the first connecting block and the second connecting block.

7. The cover-opening device as described in claim 1, characterized in that: The connecting cavity is provided with a reset spring on both sides. One end of the reset spring is fixedly connected to the snap-fit ​​block, and the other end is connected to the bottom of the connecting cavity.

8. The cover uncovering device according to claim 1, characterized in that: The outer connecting pin is provided with spiral grooves distributed in a spiral shape, and the connecting buckle is provided with spiral protrusions that engage with the spiral grooves.

9. The cover uncovering device according to claim 1, characterized in that: The inner connecting pin has a first pull ring at its end, and the outer connecting pin has a second pull ring at its end.

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