Special crane for hoisting steel ladle

Abstract

The utility model provides a special crane for lifting a steel ladle, which comprises a cross beam, a trolley arranged on the cross beam, a lifting appliance arranged below the trolley, two lifting hooks symmetrically arranged below the lifting appliance, a lifting motor arranged on the trolley and used for driving the lifting appliance to lift, and a controller used for controlling the lifting motor to rotate forwards, reversely or stop, the lifting motor is in transmission connection with a lifting encoder, the bottom of the lifting hook is provided with a trunnion in-place detection mechanism used for detecting whether the trunnion is hung in place or not, and the lifting encoder and the trunnion in-place detection mechanism are both electrically connected with the controller; the hanging in-place state of the steel ladle trunnion is detected through the trunnion in-place detection mechanisms arranged on the two hooks, and the lifting height is limited when the steel ladle trunnion is not hung in place, so that the situation that a steel ladle hanger is continuously lifted when the hooks are not hung in place, the steel ladle is unbalanced and tippled over is avoided, and the production safety is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of cranes, and in particular relates to a special crane for lifting a ladle. Background Art

[0002] The lifting of the ladle requires the use of a crane and a corresponding ladle hoist. The current ladle hoist, such as the Chinese utility model patent document with the authorization announcement number CN220351474U, discloses a multi-purpose inseparable hoist for a casting crane. The ladle hoist has two hooks that match the ear shafts on both sides of the ladle. In the process of lifting the ladle, if the hook does not completely hang on the ear shaft of the ladle, but the hook tip is on the middle side of the shaft of the ear shaft, forming a "line" contact between the hook and the ear shaft, if the ladle hoist is continued to be lifted at this time, it will cause the ladle to become unbalanced and overturned, and the molten steel will leak and explode, posing a huge safety hazard.

[0003] Therefore, it is necessary to design a special ladle lifting crane that can detect the connection status between the ladle hanger hook and the ear shaft, stop the ladle hanger from continuing to lift when the hook is not in place, and improve production safety to solve the current technical problems. Summary of the invention

[0004] In view of the deficiencies in the prior art, the utility model provides a special crane for lifting ladle which can detect the connection status between the hook of the ladle hoist and the ear shaft, stop the ladle hoist from further lifting when the hook is not hung in place, and improve production safety.

[0005] The technical solution of the utility model is: a special crane for lifting ladle, including a crossbeam, a trolley is arranged on the crossbeam, a hoisting device is arranged below the trolley, two hooks are symmetrically arranged below the hoisting device, a lifting motor is arranged on the trolley to drive the hoisting device to rise and fall, and also includes a controller, the controller is used to control the lifting motor to rotate forward, reverse or stop, the lifting motor is connected to a lifting encoder, the bottom of the hook is provided with an ear shaft in place detection mechanism for detecting whether the ear shaft is hung in place, and the lifting encoder and the ear shaft in place detection mechanism are both electrically connected to the controller.

[0006] The ear axis in position detection mechanism has a support tube arranged at the bottom of the hook, a lifting rod is slidably arranged inside the support tube, the top of the lifting rod extends upward to the inner side of the hook, the bottom of the lifting rod is elastically supported between the support tube, a trigger rod is arranged at the bottom end of the lifting rod, a proximity switch cooperating with the trigger rod is arranged on one side of the support tube, and the proximity switch is electrically connected to the controller.

[0007] A support ring is fixedly provided on the outer side of the bottom end of the lifting rod, a support edge is fixedly provided on the inner side of the support tube, the trigger rod is slidably provided inside the support edge, and a spring is sleeved on the outer side of the trigger rod between the support edge and the support ring.

[0008] The output end of the controller is electrically connected to a contactor, and the normally closed contact of the contactor is connected in series in the main circuit of the lifting motor.

[0009] The upper end of the lifting rod is provided with a rounded corner.

[0010] The controller is electrically connected with an alarm module.

[0011] The alarm module is an audible and visual alarm.

[0012] The beneficial effects of the utility model are as follows: the utility model detects the hanging status of the ladle ear shaft by means of the ear shaft in place detection mechanism arranged on the two hooks, and limits the lifting height when it is not hung in place, thereby avoiding the ladle being unbalanced and tipping over due to continuing to lift the ladle hoist when the hooks are not hung in place, thereby improving production safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is one of the schematic diagrams of the structure of the hoisting device in the special crane for hoisting the ladle in the utility model.

[0014] Figure 2 This is the second schematic diagram of the structure of the hoisting device in the special crane for hoisting the ladle in the utility model.

[0015] Figure 3 for Figure 2 Cross-section view at AA in the middle.

[0016] Figure 4 for Figure 3 A partial enlarged view of point B in the middle.

[0017] Figure 5 The utility model is a functional block diagram of a special crane for lifting a steel ladle. DETAILED DESCRIPTION

[0018] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative and is by no means intended to limit the present invention and its application or use. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to make the present invention thorough and complete and to fully express the scope of the present invention to those skilled in the art. It should be noted that unless otherwise specifically stated, the relative arrangement of the components and steps, the composition of the materials, the numerical expressions and the numerical values ​​set forth in these embodiments should be interpreted as being merely exemplary and not as limiting.

[0019] The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different parts. The words "include" or "comprise" and similar words mean that the elements before the word include the elements listed after the word, and do not exclude the possibility of including other elements. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0020] like Figures 1 to 5 As shown, a special crane for lifting a ladle comprises a crossbeam, a trolley is arranged on the crossbeam, a sling 1 is arranged below the trolley, two hooks 11 are symmetrically arranged below the sling 1, a lifting motor for driving the lifting of the sling is arranged on the trolley, and a controller 3 is also included, the controller 3 is used to control the forward rotation, reverse rotation or stop of the lifting motor, a lifting encoder 4 is transmission-connected to the lifting motor, the lifting encoder 4 is used to detect the lifting height of the sling 1, and an ear shaft in place detection mechanism 2 for detecting whether the ear shaft is in place is arranged at the bottom of the hook 11, and the lifting encoder 4 and the ear shaft in place detection mechanism 2 are both electrically connected to the controller 3; in this embodiment, the height of the sling 1 is fixed when the two hooks 11 of the sling 1 are hung in place on the ear shafts on both sides of the ladle, and the height value is set to a first preset value inside the controller 3. During the hanging process, the controller When the lifting encoder 4 detects that the sling 1 is lifted to the first preset height, the controller 3 detects the triggering state of the ear shaft in place detection mechanism 2 on the two hooks 1; if the two ear shaft in place detection mechanisms 2 are triggered, the controller 3 receives the triggering signals of the two ear shaft in place detection mechanisms 2, at this time, the ear shafts on both sides of the ladle are hung in place, and the controller 3 controls the sling 1 to continue to rise and lift the ladle to the set height; if the two ear shaft in place detection mechanisms 2 are not triggered, or one ear shaft in place detection mechanism 2 is not triggered, the controller 3 receives the triggering signals of one or zero ear shaft in place detection mechanisms 2, at this time, it means that the ear shafts on both sides of the ladle are not hung in place, and the controller 3 controls the lifting motor to stop lifting or descend to the set position to avoid the ladle being unbalanced and tipping over due to the ladle sling continuing to lift when the hooks are not hung in place.

[0021] As a specific implementation of the trunnion in place detection mechanism 2, Figures 3 to 5As shown, the ear axis in place detection mechanism 2 has a support tube 23 arranged at the bottom of the hook 11, and a lifting rod 21 is slidably arranged inside the support tube 23. The top end of the lifting rod 21 extends upward to the inner side of the hook 11, and the bottom of the lifting rod 21 is elastically supported between the support tube 23. A trigger rod 27 is arranged at the bottom end of the lifting rod 21, and a proximity switch 26 cooperating with the trigger rod 27 is arranged on one side of the support tube 23. The proximity switch 26 is electrically connected to the controller 3; when the ear axis is hung in place, the ear axis is embedded in the inner side of the hook 11, the ear axis pushes the lifting rod 21 to move downward, the elastic support is compressed, the lifting rod 21 drives the trigger rod 27 to move downward, and the trigger rod 27 corresponds to the proximity switch 26 after moving downward, and the proximity switch 26 is triggered. The controller 3 can determine whether the ear axis is hung in place by collecting the trigger signal of the proximity switch 26; after the ear axis is separated from the hook 11, the elastic support is reset, the lifting rod 21 and the trigger rod 27 move upward, and the trigger rod 27 no longer triggers the proximity switch.

[0022] In some embodiments, a support ring 22 is fixedly provided on the outer side of the bottom end of the lifting rod 21, and the support ring 22 and the lifting rod 21 are an integral structure. A support edge 24 is fixedly provided on the inner side of the support tube 23, and the support edge 24 and the support tube 23 are an integral structure. A trigger rod 27 is slidably arranged inside the support edge 24, and a spring 25 is mounted on the outer side of the trigger rod 27 between the support edge 24 and the support ring 22. The upper and lower ends of the spring 25 are respectively against the support ring 22 and the support edge 24, so as to provide elastic support for the bottom end of the lifting rod 21.

[0023] In some embodiments, the output end of the controller 3 is electrically connected to the contactor 5, and the normally closed contact of the contactor 5 is connected in series in the main circuit of the lifting motor. When the lifting motor is lifted to the first preset height, when the controller 5 does not receive the trigger signal of the proximity switch 26 in the two ear shaft in-position detection mechanism 2, the controller 3 outputs a control signal to the contactor 5, the contactor 5 is actuated, the normally closed contact is disconnected, the lifting motor is disconnected, and the sling 1 no longer rises.

[0024] In some embodiments, a rounded corner 211 is disposed at the upper end of the lifting rod 21 .

[0025] In some embodiments, the controller 3 is electrically connected to an alarm module 6; specifically, the alarm module 6 is an audible and visual alarm. When the lifting motor is lifted to a first preset height, and the controller 5 does not receive a trigger signal from the proximity switch 26 in the two ear shaft in-place detection mechanisms 2, the controller 3 controls the audible and visual alarm to start emitting an audible and visual alarm to alert on-site personnel.

[0026] So far, various embodiments of the present invention have been described in detail. In order to avoid obscuring the concept of the present invention, some details known in the art are not described. Based on the above description, those skilled in the art can fully understand how to implement the technical solution disclosed here.

[0027] The above-mentioned embodiments only express some implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A special crane for ladle lifting, comprising a crossbeam, a trolley is arranged on the crossbeam, a sling is arranged below the trolley, two hooks are symmetrically arranged below the sling, and a lifting motor is arranged on the trolley to drive the sling to rise and fall, characterized in that: It also includes a controller, which is used to control the lifting motor to rotate forward, reverse or stop. The lifting motor is connected to a lifting encoder. The bottom of the hook is provided with an ear shaft in place detection mechanism for detecting whether the ear shaft is hung in place. The lifting encoder and the ear shaft in place detection mechanism are both electrically connected to the controller.

2. The ladle hoisting crane according to claim 1 is characterized in that: The ear axis in position detection mechanism has a support tube arranged at the bottom of the hook, a lifting rod is slidably arranged inside the support tube, the top of the lifting rod extends upward to the inner side of the hook, the bottom of the lifting rod is elastically supported between the support tube, a trigger rod is arranged at the bottom end of the lifting rod, a proximity switch cooperating with the trigger rod is arranged on one side of the support tube, and the proximity switch is electrically connected to the controller.

3. The ladle hoisting crane according to claim 2 is characterized in that: A support ring is fixedly provided on the outer side of the bottom end of the lifting rod, a support edge is fixedly provided on the inner side of the support tube, the trigger rod is slidably provided inside the support edge, and a spring is sleeved on the outer side of the trigger rod between the support edge and the support ring.

4. The ladle hoisting crane according to claim 1, characterized in that: The output end of the controller is electrically connected to a contactor, and the normally closed contact of the contactor is connected in series in the main circuit of the lifting motor.

5. The special crane for lifting ladle according to claim 2, characterized in that: The upper end of the lifting rod is provided with a rounded corner.

6. The ladle hoisting crane according to claim 1, characterized in that: The controller is electrically connected with an alarm module.

7. The special crane for lifting ladle according to claim 6, characterized in that: The alarm module is an audible and visual alarm.

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