Overhead crane aluminum hook control circuit and multifunctional overhead crane
The control circuit, composed of a lifting controller and limit switches, solves the problem of cumbersome limit position adjustment during the maintenance of the aluminum hook of the multi-functional overhead crane, realizes convenient control of the aluminum hook, and improves the working efficiency and safety of electrolytic aluminum production.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHOUPING HONGZHENG NEW MATERIAL TECH CO LTD
- Filing Date
- 2025-06-06
- Publication Date
- 2026-07-14
AI Technical Summary
In the electrolytic aluminum production process, the aluminum hook and wire rope of the multi-functional overhead crane are located at a high position, making the adjustment of the limit position during maintenance cumbersome and inefficient.
The control circuit, consisting of a lifting controller, contactor, limit switch, and maintenance switch, uses a series and parallel circuit design to achieve convenient lowering and raising control of the aluminum hook. Combined with a mechanical normally closed limit switch and isolation device, it ensures safety and reliability.
It simplifies the adjustment of the aluminum hook limit position, improves maintenance efficiency, enhances safety and reliability, and reduces the risk of misoperation.
Smart Images
Figure CN224493526U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of electrolytic aluminum technology, and in particular to a control circuit for an aluminum hook of an overhead crane and a multi-functional overhead crane. Background Technology
[0002] Multifunctional overhead cranes play a crucial role in the electrolytic aluminum production process in factories. These cranes feature a movable aluminum-discharging hook and a steel wire rope for pulling the hook. To ensure operational safety and efficiency, regular maintenance of the crane is necessary. However, the aluminum-discharging hook and steel wire rope are located relatively high up, requiring adjustments to the hook's limit position during maintenance, which is cumbersome and inefficient. Utility Model Content
[0003] This application provides a control circuit for the aluminum hook of an overhead crane, which facilitates the maintenance of the aluminum hook and improves work efficiency.
[0004] In a first aspect, embodiments of this application propose a control circuit for an aluminum hook ejection from an overhead crane, including a lifting controller, a first contactor, a first limit switch, and a first maintenance switch;
[0005] A set of normally closed circuits of the first limit switch and the contactor coil of the first contactor are connected in series to form a first circuit, and the two ends of the first circuit are connected to the positive and negative terminals of the lifting controller.
[0006] The normally closed circuit of the first maintenance switch is connected in parallel with that of the first limit switch;
[0007] The descent of the aluminum discharge hook triggers the first limit switch, which then disconnects. The first maintenance switch is then activated to control the aluminum discharge hook to continue descending.
[0008] In one embodiment of this application, a second contactor, a second limit switch, and a second maintenance switch are also included;
[0009] A set of normally closed circuits of the second limit switch and the contactor coil of the second contactor are connected in series to form a second circuit. The second circuit is connected in parallel with the first circuit. The second maintenance switch is connected in parallel with the normally closed circuit of the second limit switch.
[0010] The upward movement of the aluminum discharge hook triggers the second limit switch, which then disconnects. The second maintenance switch is then activated to control the aluminum discharge hook to continue rising.
[0011] In one embodiment of this application, both the first limit switch and the second limit switch are normally closed mechanical limit switches.
[0012] In one embodiment of this application, an isolation device is provided between the first limit switch and the lifting controller; and / or, an isolation device is provided between the second limit switch and the lifting controller.
[0013] In one embodiment of this application, a switching switch is also included, wherein the first circuit and the second circuit are connected in parallel and then connected in series with the switching switch.
[0014] In one embodiment of this application, the lifting controller is a microcontroller or a programmable logic controller. Secondly, this application also proposes a multi-functional overhead crane, which includes:
[0015] The crane body and the crane aluminum hook control circuit as described in any of the above items.
[0016] Based on the above embodiments, during routine maintenance, the first limit switch is triggered and disconnected, the first circuit is broken, and the aluminum hook is at its lowest position under normal operating conditions. By closing the first maintenance switch, the contactor coil of the first contactor can be re-energized, causing the motor to run and the aluminum hook to continue descending to the appropriate position, facilitating maintenance without the need for frequent readjustment of the limit switch, thereby improving work efficiency. Attached Figure Description
[0017] To more clearly illustrate the technical solutions in the embodiments of this application 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 application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.
[0018] Figure 1 This is a schematic diagram of the circuit structure of an embodiment of the overhead crane aluminum hook control circuit of this application.
[0019] Explanation of icon numbers:
[0020] 1. Control circuit for aluminum hook ejection from overhead crane; 10. Lifting controller; 20. First circuit; 21. First contactor; 22. First limit switch; 30. Second circuit; 31. First contactor; 32. First limit switch; 40. First maintenance switch; 50. Second maintenance switch.
[0021] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation
[0022] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.
[0023] Where the following description relates to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.
[0024] In the description of this application, it should be understood that the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. Furthermore, in the description of this application, unless otherwise stated, "multiple" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship.
[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.
[0026] Multifunctional overhead cranes play a crucial role in the electrolytic aluminum production process in factories. The crane consists of a main body and control circuitry. The main body features a movable aluminum discharge hook and a steel wire rope used to pull the hook. To ensure operational safety and efficiency, the crane requires frequent maintenance. However, the aluminum discharge hook and steel wire rope are located relatively high up, making maintenance cumbersome and inefficient due to the need to adjust the hook's limit position.
[0027] To resolve the above issues, please refer to [link / reference]. Figure 1 This application proposes a crane aluminum hook control circuit 1. In the embodiments of this application, the crane aluminum hook control circuit 1 includes a lifting controller 10, a first contactor, a first limit switch, and a first maintenance switch 40.
[0028] In this circuit, a set of normally closed circuits of the first limit switch and the contactor coil of the first contactor are connected in series to form a first circuit 20. The two ends of the first circuit 20 are connected to the positive and negative terminals of the lifting controller 10. The first maintenance switch 40 is connected in parallel with the normally closed circuit of the first limit switch.
[0029] The descent of the aluminum hook triggers the first limit switch, which then disconnects. This activates the first maintenance switch 40 to control the continued descent of the aluminum hook. Thus, during routine maintenance, the first limit switch is triggered and disconnected, the first circuit 20 is broken, and the aluminum hook is at its lowest position under normal operating conditions. Closing the first maintenance switch 40 re-energizes the contactor coil of the first contactor, causing the motor to run and the aluminum hook to continue descending to the appropriate position, facilitating maintenance without the need for frequent readjustment of the limit switch, thereby improving work efficiency.
[0030] Please continue to refer to Figure 1 In one embodiment of this application, a second contactor, a second limit switch, and a second maintenance switch 50 are also included.
[0031] A set of normally closed circuits of the second limit switch and the contactor coil of the second contactor are connected in series to form a second circuit 30. The second circuit 30 is connected in parallel with the first circuit 20. The second maintenance switch 50 is connected in parallel with the normally closed circuit of the second limit switch. When the aluminum hook rises, it triggers the second limit switch, which then opens the circuit. This operates the second maintenance switch 50 to control the aluminum hook to continue rising.
[0032] Understandably, when the second limit switch is triggered and disconnected, the second circuit 30 is broken, and the aluminum hook is at its highest position under normal operating conditions. By setting a second maintenance switch 50, the aluminum hook can be controlled to rise by closing the second maintenance switch 50 after maintenance, thus improving the ease of operation.
[0033] Specifically, in one embodiment of this application, both the first limit switch and the second limit switch are mechanical normally closed limit switches, which can effectively improve structural reliability and thus improve operational safety.
[0034] Further optionally, in some embodiments of this application, an isolation device is provided between the first limit switch and the lifting controller 10. Of course, an isolation device may also be provided between the second limit switch and the lifting controller 10.
[0035] The isolation device can isolate the signals generated during motor operation, avoiding interference from the signals generated by the motor during operation to the lifting controller 10, thereby ensuring the control accuracy and operational reliability of the lifting controller 10, ensuring the safety of product use, and thus increasing the product's market competitiveness.
[0036] In one embodiment of this application, the lifting controller 10 is a microcontroller or a programmable logic controller (PLC). When the lifting controller 10 is a microcontroller, the space required for installation can be effectively reduced, thereby reducing the size of the power bank. When the lifting controller 10 is a PLC, installation is more convenient and the reliability is higher, thus enhancing the reliability of the power bank and improving the user experience.
[0037] Furthermore, in one embodiment of this application, a switching switch is also included, wherein the first circuit 20 and the second circuit 30 are connected in parallel and then in series with the switching switch. Exemplarily, the switching switch can be a slide switch. During operation, the switching switch must first be closed, and then the aluminum hook is raised or lowered via the first circuit 20 or the second circuit 30. By setting a switching switch, accidental activation by the user can be further prevented, thus avoiding unnecessary safety accidents and improving operational safety.
[0038] The above is a detailed explanation of the overhead crane aluminum hook control circuit 1 of this application. It can be understood that since the multi-functional overhead crane proposed in this application includes the overhead crane body and the overhead crane aluminum hook control circuit 1 as described in any of the above embodiments, it adopts all the technical solutions of all the above embodiments, and therefore has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be repeated here.
[0039] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this application, it should be understood that if terms such as "upper," "lower," "left," "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this application. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.
[0040] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.
Claims
1. A control circuit for an aluminum hook from an overhead crane, characterized in that, Includes a lifting controller, a first contactor, a first limit switch, and a first maintenance switch; A set of normally closed circuits of the first limit switch and the contactor coil of the first contactor are connected in series to form a first circuit, and the two ends of the first circuit are connected to the positive and negative terminals of the lifting controller. The normally closed circuit of the first maintenance switch is connected in parallel with that of the first limit switch; The descent of the aluminum discharge hook triggers the first limit switch, which then disconnects. The first maintenance switch is then activated to control the aluminum discharge hook to continue descending.
2. The crane aluminum hook control circuit as described in claim 1, characterized in that, It also includes a second contactor, a second limit switch, and a second maintenance switch; A set of normally closed circuits of the second limit switch and the contactor coil of the second contactor are connected in series to form a second circuit. The second circuit is connected in parallel with the first circuit. The second maintenance switch is connected in parallel with the normally closed circuit of the second limit switch. The upward movement of the aluminum discharge hook triggers the second limit switch, which then disconnects. The second maintenance switch is then activated to control the aluminum discharge hook to continue rising.
3. The crane aluminum hook control circuit as described in claim 2, characterized in that, Both the first limit switch and the second limit switch are mechanical normally closed limit switches.
4. The crane aluminum hook control circuit as described in claim 2, characterized in that, An isolation device is provided between the first limit switch and the lifting controller; and / or, an isolation device is provided between the second limit switch and the lifting controller.
5. The crane aluminum hook control circuit as described in claim 2, characterized in that, It also includes a switching switch, which is connected in series with the first circuit and the second circuit after being connected in parallel.
6. The crane aluminum hook control circuit as described in any one of claims 1 to 5, characterized in that, The lifting controller is a microcontroller or a programmable logic controller.
7. A multi-functional overhead crane, characterized in that, include: The crane body and the crane aluminum hook control circuit as described in any one of claims 1 to 6.