Anti-shake device for lifting appliance of electromagnetic bridge crane

Abstract

The utility model provides an anti-shake device for a lifting appliance of an electromagnetic bridge crane, which comprises an upper fixing mechanism fixed on a main beam of the electromagnetic bridge crane and a lower moving mechanism arranged on the electromagnetic lifting appliance, and in a free state, the lower moving mechanism is positioned right below the upper fixing mechanism; the lower moving mechanism comprises a lower base detachably connected with the electromagnetic lifting appliance, and a guide cone is arranged on the upper surface of the lower base; the upper fixing mechanism comprises an upper base detachably connected with a main beam of the electromagnetic bridge crane, a guide cylinder allowing the guide cone to be inserted is arranged on the lower portion of the upper base, and the length value of the guide cylinder is larger than that of the guide cone. And a capacitive displacement sensor is arranged in the guide cylinder and is used for measuring the distance value between the capacitive displacement sensor and the guide cone in the vertical direction. The device can timely and effectively control the swing amplitude of the bridge crane lifting appliance and can prevent the electromagnetic lifting appliance from rushing to the top in the lifting process.

Description

Technical Field

[0001] The utility model relates to the field of lifting equipment, in particular to an anti-shake device for an electromagnetic bridge crane hoist. Background Art

[0002] During the operation of a bridge crane, especially when the trolley is starting, accelerating, braking, or decelerating, the load generates inertial forces, causing the spreader to shift horizontally and oscillate. To prevent the electromagnetic spreader from swaying, its lateral position must be restricted during the lifting process. However, the traditional inverted eight-shaped steel wire rope anti-sway device has a complex structure, which increases the difficulty of manufacturing and installation, as well as maintenance costs, and its intelligence level is relatively low. Electrical anti-sway devices are expensive to manufacture, require less professional knowledge for routine maintenance, are significantly affected by the environment, and struggle to maintain long-term stability.

[0003] The utility model patent with authorization announcement number CN211310600U discloses an anti-sway device for a bridge crane, comprising a traveling mechanism, a main beam on the traveling mechanism, a hoisting trolley and a control room on the main beam, a sling on the trolley, a laser transmitter and a laser receiver on the trolley, a laser reflector on the sling, a controller in the control room, sliding grooves on both sides of the inner wall of the control room, a sliding plate slidably mounted in the two sliding grooves, and a controller movably mounted on one side of the sliding plate by bolts. The anti-sway device for a bridge crane has a simple structure. When the cover is opened, the controller can be moved outside the control room, allowing maintenance personnel to obtain sufficient light and space to perform maintenance operations. However, the anti-sway device for a bridge crane cannot effectively and timely control the swing amplitude of the bridge crane's sling. Utility Model Content

[0004] In order to timely and effectively control the swing amplitude of the bridge crane spreader and prevent the electromagnetic spreader from hitting the top during the lifting process, the technical solution adopted by the utility model is: an electromagnetic bridge crane spreader anti-shake device, including an upper fixing mechanism fixed to the main beam of the electromagnetic bridge crane and a lower moving mechanism provided on the electromagnetic spreader. In a free state, the lower moving mechanism is located directly below the upper fixing mechanism;

[0005] The lower moving mechanism includes a lower base detachably connected to the electromagnetic sling, and a guide cone is provided on the upper surface of the lower base;

[0006] The upper fixing mechanism includes an upper base detachably connected to the main beam of the electromagnetic bridge crane, and a guide cylinder for inserting the guide cone is provided at the lower part of the upper base, and the length of the guide cylinder is greater than the length of the guide cone;

[0007] A capacitive displacement sensor is provided in the guide cylinder, and the capacitive displacement sensor is used to measure the distance to the guide cone in the vertical direction.

[0008] Based on the above, in order to facilitate guiding, an arc-shaped cover plate is provided at the bottom of the guide cylinder, and the arc-shaped cover plate is used to guide the guide cone to be inserted into the guide cylinder.

[0009] Based on the above, in order to increase the structural strength, a plurality of lower ribs are provided on the outer circumference of the guide cone, and the bottoms of the lower ribs are connected to the upper surface of the lower base.

[0010] Based on the above, a plurality of lower ribs are arranged in a circular array with equal spacing on the outer peripheral surface of the guide cone.

[0011] Based on the above, in order to prevent the spreader from colliding with the main beam of the electromagnetic bridge crane, the diameter difference between the guide cone and the guide cylinder is smaller than the top width of the lower rib plate.

[0012] Based on the above, in order to increase the structural strength, a plurality of upper ribs are provided on the outer peripheral surface of the guide cylinder, and the tops of the upper ribs are connected to the lower surface of the upper base.

[0013] Based on the above, a plurality of upper ribs are arranged in a circular array with equal spacing on the outer circumferential surface of the guide cylinder.

[0014] Based on the above, in order to facilitate control, the capacitive displacement sensor is communicatively connected to the control center of the electromagnetic bridge crane.

[0015] Specifically, when a crane is lifting an object and it enters the capacitive displacement sensor's sensing range, the capacitive displacement sensor mounted on the main beam will measure the distance to the upper surface of the guide cone's upper cone every 25 milliseconds. A sudden change in distance, when the laser beam leaves the edge of the guide cone's upper surface, indicates that the hoist is swaying. At this point, the crane is controlled to stop lifting. Then, under the weight of the object and the hoist, the axis offset between the guide cone and the guide cylinder returns to normal. Theoretically, the two axes are now aligned. Only then can the crane resume lifting until the guide cone enters the guide cylinder.

[0016] The present invention has substantial features and advancements over the prior art. Specifically, the present invention provides an anti-shake device for electromagnetic bridge crane slings. By installing a lower moving mechanism that rises and falls with the electromagnetic sling on the electromagnetic bridge crane, an upper fixing mechanism is provided on the main beam of the electromagnetic bridge crane, and the upper fixing mechanism is provided directly above the lower moving mechanism. A capacitive displacement sensor for sensing the position of the lower moving mechanism is also provided on the upper fixing mechanism. Thus, the capacitive displacement sensor can be used to measure the distance between the upper fixing mechanism and the lower moving mechanism at any time. When the distance suddenly changes, it can be promptly determined that the electromagnetic sling has shaken. Subsequently, the start and stop of the crane trolley lifting motor can be controlled based on the judgment result, thereby promptly and effectively controlling the swing amplitude of the bridge crane sling. The device has a simple structure, low cost, is easy to maintain, and has stable performance.

[0017] Furthermore, by designing the bottom of the upper fixed mechanism into a guide cylinder form, designing the top of the lower movable mechanism into a guide cone form that cooperates with the guide cylinder, and making the length of the guide cylinder greater than the length of the guide cone, and welding a lower rib plate at the bottom of the guide cone for reinforcement and limiting the insertion depth into the guide cylinder, the upper end of the guide cone is designed to be a frustum, so that while ensuring that the guide cone can smoothly enter the guide cylinder, the insertion depth of the guide cone and the guide cylinder can also be used to control the distance between the electromagnetic lifter and the main beam, and perform hard limiting, thereby effectively preventing the electromagnetic lifter from hitting the top during lifting. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The utility model is a schematic diagram of the overall structure of the electromagnetic bridge crane hoist anti-shake device.

[0019] Figure 2 The utility model is a schematic structural diagram of a state in which a guide cone of an electromagnetic bridge crane hoist anti-shake device is inserted into a guide cylinder.

[0020] Figure 3 The utility model is a schematic diagram of the structure of a guide cylinder in the anti-shake device of the electromagnetic bridge crane hoist provided by the utility model.

[0021] Figure 4 The utility model is a schematic diagram of the guide cone structure in the anti-shake device of the electromagnetic bridge crane hoist provided by the present invention.

[0022] In the figure: 1. Upper fixing mechanism; 2. Upper rib plate; 3. Guide cylinder; 4. Arc cover plate; 5. Capacitive displacement sensor; 6. Bolt hole; 7. Upper base; 8. Frustum; 9. Guide cone; 10. Lower rib plate; 11. Lower base; 12. Lower moving mechanism. DETAILED DESCRIPTION

[0023] The technical solution of the present utility model is further described in detail below through specific implementation methods.

[0024] Example 1

[0025] This embodiment provides an anti-shake device for electromagnetic bridge crane hoisting equipment, such as Figure 1 、 Figure 2 、 Figure 3 and Figure 4 As shown, it includes an upper fixing mechanism 1 fixed on the main beam of the electromagnetic bridge crane, and a lower moving mechanism 12 provided on the electromagnetic spreader. In a free state, the lower moving mechanism 12 is located directly below the upper fixing mechanism 1.

[0026] The lower moving mechanism 12 includes a lower base 11 detachably connected to the electromagnetic sling. A guide cone 9 is provided on the upper surface of the lower base 11. The upper fixing mechanism 1 includes an upper base 7 detachably connected to the main beam of the electromagnetic overhead crane. A guide cylinder 3 is provided below the upper base 7 for inserting the guide cone 9. The length of the guide cylinder 3 is greater than that of the guide cone 9.

[0027] A capacitive displacement sensor 5 is provided in the guide cylinder 3 , and the capacitive displacement sensor 5 is used to measure the distance to the guide cone 9 in the vertical direction.

[0028] To increase structural strength, the guide cone 9 is provided with a plurality of lower ribs 10 on its outer circumference, and the bottom of the lower ribs 10 is connected to the upper surface of the lower base 11. To increase structural strength, the guide cylinder 3 is provided with a plurality of upper ribs 2 on its outer circumference, and the top of the upper ribs 2 is connected to the lower surface of the upper base 7.

[0029] To prevent the spreader from colliding with the electromagnetic overhead crane's main beam, the diameter difference between the guide cone 9 and the guide cylinder 3 is smaller than the top width of the lower rib 10. For easier control, the capacitive displacement sensor 5 is connected to the electromagnetic overhead crane's control center. Bolt holes 6 are provided on each of the upper base 7 and lower base 11.

[0030] Example 2

[0031] This embodiment provides an electromagnetic overhead crane sling anti-shake device. The main difference from Embodiment 1 is that in this embodiment, to facilitate guidance, an arc-shaped cover plate 4 is provided at the bottom of the guide cylinder 3. The arc-shaped cover plate 4 is used to guide the guide cone 9 to be inserted into the guide cylinder 3. The top of the guide cone 9 is provided with a frustum 8.

[0032] Example 3

[0033] This embodiment provides an anti-shake device for electromagnetic overhead crane slings. The main difference from Embodiment 1 is that in this embodiment: a plurality of lower ribs are arranged in a circular array with equal spacing on the outer circumference of the guide cone. A plurality of upper ribs are arranged in a circular array with equal spacing on the outer circumference of the guide cylinder.

[0034] Specifically, after the electromagnetic gantry crane is assigned a loading task through the production system, when the crane is lifting an object and it enters the sensing range of the capacitive displacement sensor, the capacitive displacement sensor on the guide cylinder mounted on the main beam will detect the distance to the upper surface of the guide cone's upper frustum every 25 milliseconds. When the distance suddenly changes—that is, when the laser beam leaves the edge of the guide cone's upper surface—it indicates that the hoist is swaying. At this point, the crane must be controlled to stop lifting. Then, under the action of gravity, the axial offset distance between the guide cone and the guide cylinder will return to normal. Theoretically, the two axes will now coincide. Only then can the crane continue lifting until the guide cone enters the guide cylinder. At the same time, because the guide cylinder is longer than the cone, it can also prevent the hoist from hitting the top.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model and not to limit it; although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the utility model can still be modified or some technical features can be replaced by equivalents; without departing from the spirit of the technical solution of the utility model, they should all be included in the scope of the technical solution for which protection is requested in the utility model.

Claims

1. An electromagnetic bridge crane sling anti-shake device, characterized by: It includes an upper fixing mechanism fixed on the main beam of the electromagnetic bridge crane, and a lower moving mechanism provided on the electromagnetic spreader. In a free state, the lower moving mechanism is located directly below the upper fixing mechanism. The lower moving mechanism includes a lower base detachably connected to the electromagnetic sling, and a guide cone is provided on the upper surface of the lower base; The upper fixing mechanism includes an upper base detachably connected to the main beam of the electromagnetic bridge crane, and a guide cylinder for inserting the guide cone is provided at the lower part of the upper base, and the length of the guide cylinder is greater than the length of the guide cone; A capacitive displacement sensor is provided in the guide cylinder, and the capacitive displacement sensor is used to measure the distance to the guide cone in the vertical direction.

2. The electromagnetic bridge crane sling anti-shake device according to claim 1, characterized in that: An arc-shaped cover plate is provided at the bottom of the guide cylinder, and the arc-shaped cover plate is used to guide the guide cone to be inserted into the guide cylinder.

3. The electromagnetic bridge crane sling anti-shake device according to claim 1 or 2, characterized in that: A plurality of lower ribs are provided on the outer peripheral surface of the guide cone, and the bottoms of the lower ribs are connected to the upper surface of the lower base.

4. The electromagnetic bridge crane sling anti-shake device according to claim 3, characterized in that: A plurality of lower ribs are arranged in a circular array with equal spacing on the outer peripheral surface of the guide cone.

5. The electromagnetic bridge crane sling anti-shake device according to claim 4, characterized in that: The diameter difference between the guide cone and the guide cylinder is smaller than the top width of the lower rib plate.

6. The anti-shake device for electromagnetic overhead crane sling according to claim 5, characterized in that: A plurality of upper ribs are provided on the outer peripheral surface of the guide cylinder, and the tops of the upper ribs are connected to the lower surface of the upper base.

7. The electromagnetic bridge crane sling anti-shake device according to claim 6, characterized in that: A plurality of upper ribs are arranged in a circular array with equal spacing on the outer circumference of the guide cylinder.

8. The anti-shake device for electromagnetic overhead crane sling according to claim 7, characterized in that: The capacitive displacement sensor is communicatively connected to a control center of the electromagnetic bridge crane.

Images