A kind of early warning device about preventing steel wire rope from winding into speed reducer

Abstract

The utility model discloses a kind of early warning devices about preventing steel wire rope to be twisted into speed reducer, it is related to early warning device technical field, to solve the problem of steel wire rope running groove and being twisted into speed reducer to cause its damage, operation interruption. The device includes support, touch type positioner, alarm, screw rod and contactor;Support is welded on the outside of speed reducer, across speed reducer and steel wire rope reel, for fixing other components;Touch type positioner is installed on the top of support by screw rod, for signal transmission;Alarm is installed in crane cab;Contactor is installed in hoist electrical control cabinet, for controlling hoist operating circuit and triggering alarm. When working, if steel wire rope deviates from predetermined path and touches touch type positioner, positioner sends signal to contactor, contactor immediately cuts off hoist power supply to make it stop running, and triggers alarm to prompt operator to handle. The device can prevent steel wire rope to be twisted into speed reducer in real time, can guarantee that crane grab bucket is safely and efficiently operated.

Description

Technical Field

[0001] This utility model relates to the field of early warning device technology, and in particular to an early warning device for preventing wire rope from getting caught in a speed reducer. Background Technology

[0002] In the fields of industrial production and material handling, overhead crane grabs are commonly used lifting equipment. They are raised, lowered, opened, and closed by the traction of steel wire ropes to complete the grabbing and lifting of materials.

[0003] However, in actual operation, the crane grab bucket is susceptible to various complex external forces due to frequent operation, such as swaying during lifting, changes in working conditions, unbalanced tension caused by material eccentricity, and inertial force generated by sudden start and stop. These factors may cause the wire rope to deviate from the normal pulley track (i.e., "running off track").

[0004] If the wire rope runs off track and is not detected and dealt with in time, it can easily get caught in the speed reducer. As a key component of the overhead crane grab's transmission system, the speed reducer has a precise internal structure. Once caught in the wire rope, it will directly damage internal parts (such as gears, shafts, couplings, etc.), causing seals to break, parts to jam, and ultimately preventing the speed reducer from operating normally, causing the overhead crane grab to be interrupted and seriously affecting production efficiency.

[0005] Therefore, developing a device that can accurately and promptly warn of the risk of wire rope running off track and getting tangled in the reducer is of urgent and necessary significance for ensuring the safe, stable and efficient operation of the crane grab bucket. Utility Model Content

[0006] To address the shortcomings of existing technologies, this utility model provides an early warning device to prevent wire rope from getting caught in the reducer. This solves the technical problem that during crane grab bucket operations, wire rope running off the groove and getting caught in the reducer can cause damage to the reducer's seals, gear and coupling jamming, and other malfunctions, preventing the reducer from operating normally.

[0007] To achieve the above objectives, this utility model provides the following technical solution: A warning device for preventing wire rope from getting caught in a speed reducer includes a bracket, a touch-type limit switch, an alarm, a screw, and a contactor; The bracket is welded to the outside of the reducer and spans between the reducer and the wire rope drum; The touch-type limit switch is mounted on the bracket via a screw and is used to transmit signals to the contactor; The alarm is installed in the driver's cab of the vehicle; The contactor is installed in the hoist electrical control cabinet and is used to control the grab bucket hoist operating circuit and trigger the alarm.

[0008] Preferably, the touch-type limiter is configured to send a signal to the contactor when the crane grab wire rope deviates from the predetermined path and touches the limiter.

[0009] Preferably, the contactor is configured to: after receiving a signal from the touch-type limit switch, cut off the power supply to the grab bucket winch operating circuit to stop the winch operation, and send a trigger signal to the alarm.

[0010] Preferably, the screw is used to fix the position of the touch limiter on the bracket to ensure the stability of the touch limiter position.

[0011] Compared with the prior art, the present invention has the following beneficial effects: By monitoring the wire rope status in real time, an early warning is immediately triggered and the hoisting power is cut off when the wire rope just starts to run off track and touches the contact limit switch. This effectively prevents the wire rope from getting caught in the reducer, avoids malfunctions such as gear and coupling jamming and seal damage inside the reducer, and ensures the normal operation of the reducer.

[0012] Reduce damage to the speed reducer caused by wire rope entanglement, extend its service life, and reduce equipment maintenance and replacement costs.

[0013] To avoid interruptions in crane grab operations due to reducer failure, reduce economic losses caused by production stoppages, and improve operational efficiency.

[0014] The device consists of simple components such as a bracket, a touch-type limit switch, an alarm, a screw, and a contactor. It has a simple structure, is easy to install (such as welding or screw fixing), and has low component acquisition and assembly costs, making it economical and affordable.

[0015] By combining electrical control with mechanical monitoring, signals are transmitted in real time, enabling operators to quickly receive and respond to warnings, preventing accidents from escalating, with significant results. Attached Figure Description

[0016] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0017] Figure 1 This is a structural diagram of the present invention.

[0018] Legend: 4. Bracket; 5. Screw; 6. Touch limit switch; 7. Contactor; 8. Alarm; 9. Grab bucket hoisting circuit; 1. Wire rope drum; 2. Crane grab bucket wire rope; 3. Reducer. Detailed Implementation

[0019] This application provides an early warning device to prevent wire rope from getting caught in the reducer, effectively solving the technical problem that wire rope running into the reducer during crane grab bucket operations, causing damage to the reducer's seals, gear and coupling jamming, and other faults, thus preventing the reducer from operating normally. Example

[0020] like Figure 1 As shown, the overall technical solution in this application embodiment is as follows: To address the problems existing in the prior art, this utility model provides an early warning device for preventing wire rope from getting caught in the reducer, which consists of a wire rope drum 1, a crane grab bucket wire rope 2, a reducer 3, a bracket 4, a screw 5, a contact-type limit switch 6, a contactor 7, an alarm 8, and a grab bucket winch operating circuit 9.

[0021] The installation and connection relationships of each component are as follows: The bracket 4 is fixed to the outside of the reducer 3 by welding, and it spans between the reducer 3 and the wire rope drum 1, serving as a load-bearing foundation for fixing other components; the touch-type limit switch 6 is installed above the bracket 4 by a screw 5, which effectively ensures the stability of the touch-type limit switch 6 on the bracket 4 and prevents it from shifting due to vibrations or other factors during crane operation; the alarm 8 is installed in the crane cab to facilitate timely detection of warning signals by the operator; the contactor 7 is installed in the hoist electrical control cabinet and is electrically connected to the touch-type limit switch 6, the alarm 8, and the grab bucket hoist operating circuit 9 to realize signal transmission and control functions.

[0022] The working process of this device is as follows: During normal operation of the crane, the crane grab wire rope 2 runs along the predetermined path under the constraint of the wire rope drum 1, and will not come into contact with the touch-type limit switch 6. When the crane grab is affected by complex external forces due to frequent operation (such as lifting sway, material unbalanced load, inertial force of sudden start and stop, etc.), causing the crane grab wire rope 2 to deviate from the predetermined path (i.e., run off track), if the crane grab wire rope 2 touches the touch-type limit switch 6, the touch-type limit switch 6 will immediately send an electrical signal to the contactor 7.

[0023] After receiving the signal, contactor 7 will perform two operations simultaneously: first, cut off the power supply to the grab hoist running circuit 9 to stop the grab hoist from running, thus preventing the crane grab wire rope 2 from further deviating or getting tangled from the power source; second, send a trigger signal to alarm 8, at which time alarm 8 installed in the cab will sound an alarm (such as an audible and visual alarm) to remind the operator that the crane grab wire rope 2 has come off the groove and there is a risk of it getting caught in the reducer 3.

[0024] Upon receiving the alarm, the operator can quickly take measures such as stopping the machine for inspection and adjusting the position of the wire rope, thereby effectively preventing the wire rope 2 of the crane grab bucket from getting caught in the reducer 3, avoiding malfunctions such as gear and coupling jamming and seal damage inside the reducer 3, and ensuring the normal operation of the reducer 3.

[0025] In this embodiment, all components work closely together, and the combination of mechanical structure and electrical control enables real-time monitoring and early warning of the risk of wire rope derailment. The device adopts simple installation methods such as welding and screw fixing, resulting in low component acquisition and assembly costs. It can also be directly integrated into existing overhead crane grab equipment, featuring a simple structure and cost-effectiveness. At the same time, it can trigger an early warning and cut off power as soon as the wire rope derails, which can significantly reduce the probability of damage to the reducer 3, reduce production interruptions caused by equipment failure, and improve operational efficiency, with significant effects.

[0026] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A warning device for preventing wire rope from getting caught in a speed reducer, comprising a wire rope drum (1) and a crane grab wire rope (2), characterized in that, The early warning device also includes a bracket (4), a touch limit switch (6), a reducer (3), an alarm (8), a screw (5), a grab bucket winch operating circuit (9), and a contactor (7). The bracket (4) is welded to the outside of the reducer (3) and spans between the reducer (3) and the wire rope drum (1); The touch-type limiter (6) is mounted above the bracket (4) via a screw (5) and is used to transmit signals to the contactor (7); The alarm (8) is installed in the driver's cab of the vehicle; The contactor (7) is installed in the hoist electrical control cabinet and is used to control the grab bucket hoist operation circuit (9) and trigger the alarm (8).

2. The early warning device according to claim 1, characterized in that, The touch-type limiter (6) is configured to send a signal to the contactor (7) when the crane grab wire rope (2) deviates from the predetermined path and touches the limiter.

3. The early warning device of claim 2, wherein, The contactor (7) is configured to: after receiving the signal from the touch limit switch (6), cut off the power supply to the grab hoisting operation circuit (9) to stop the hoisting operation, and send a trigger signal to the alarm (8).

4. The early warning device of claim 3, wherein, The screw (5) is used to fix the position of the touch limiter (6) on the bracket (4) to ensure that the position of the touch limiter (6) is stable.

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