CN215626272U

CN215626272U - Steel wire rope sliding monitoring system of container crane

Info

Publication number: CN215626272U
Application number: CN202121081383.1U
Authority: CN
Inventors: 李征波; 梁瑞秋; 潘锦清; 岑杰成; 杨逸森
Original assignee: Guangzhou Container Harbor Co ltd; CCCC Fourth Harbor Engineering Institute Co Ltd; Guangzhou Port Group Co Ltd
Current assignee: Guangzhou Container Harbor Co ltd; CCCC Fourth Harbor Engineering Institute Co Ltd; Guangzhou Port Group Co Ltd
Priority date: 2021-05-19
Filing date: 2021-05-19
Publication date: 2022-01-25
Anticipated expiration: 2031-05-19

Abstract

The utility model discloses a container crane steel wire rope sliding monitoring system which comprises a steel wire rope, a limit stop, a position sensor, a relay and an alarm device, wherein the limit stop is fixed on the steel wire rope, the position sensor is positioned on one side of the limit stop and used for detecting the displacement of the limit stop, and the position sensor is electrically connected with the alarm device through the relay and used for driving the alarm device to give an alarm according to the sliding of the steel wire rope. The utility model can automatically monitor the sliding of the steel wire rope.

Description

Steel wire rope sliding monitoring system of container crane

Technical Field

The utility model relates to an accessory of a crane, in particular to a system for monitoring the sliding of a steel wire rope of a container crane.

Background

The container crane for field loading and unloading of containers at ports and wharfs mainly uses a steel wire rope to load and unload containers, the steel wire rope needs to be fixed by bolts and pressing codes at the front bridge position of the crane, if the pressing codes are not tight enough, the steel wire rope can be loosened and shifted after being stressed, so that the lifting appliance and the containers incline due to uneven stress, and the serious or even the consequence that the steel wire rope is broken to crash the goods can be caused.

The container crane at the wharf is busy in operation, the inspection of the lifting steel wire rope is extremely important, the on-site inspection of technicians is mainly carried out at present, but the busy operation prevents the technicians from frequently inspecting the steel wire rope on the site.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model aims to provide a system for monitoring the sliding of a steel wire rope of a container crane, which can automatically monitor the sliding of the steel wire rope.

The purpose of the utility model is realized by the following technical scheme:

the utility model provides a container crane wire rope slip monitoring system, includes wire rope, limit stop, position sensor, relay and alarm device, and limit stop is fixed in wire rope, and position sensor is located limit stop one side and is used for detecting limit stop's displacement, and position sensor is connected through relay and alarm device electricity for slide according to wire rope and order about alarm device and send out the police dispatch newspaper.

Preferably, the limit stop comprises a sleeve body and a baffle plate, the sleeve body is fixedly sleeved on the steel wire rope, the baffle plate extends out from the side part of the sleeve body, and the position sensor is opposite to the baffle plate.

Preferably, the position sensor is connected in series with the coil of the relay in a control loop.

Preferably, the normally closed contact of the relay is electrically connected with the alarm device.

Preferably, the alarm device comprises a PLC and an audible and visual alarm electrically connected with the PLC.

Compared with the prior art, the utility model has the following beneficial effects:

according to the utility model, the position sensor is matched with the limit stop block through relative displacement, so that the position sensor obtains a steel wire rope sliding signal, and the relay triggers the alarm device to give an alarm, thereby realizing real-time monitoring on whether the steel wire rope slides, replacing the field inspection of technicians, having protection and alarm prompting functions, greatly reducing the accident probability caused by the looseness of the steel wire rope, improving the safety coefficient of equipment, reducing the shutdown times of the equipment due to inspection, simultaneously reducing the workload of the technicians and improving the overall working efficiency.

Drawings

FIG. 1 is a schematic structural view of a system for monitoring the slippage of a steel cable of a container crane according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of the position sensor and relay coil connection of the present invention;

FIG. 3 is a schematic diagram of the relay normally closed contact of the present invention connected to a PLC;

FIG. 4 is a program diagram of the PLC of the present invention.

In the figure: 1. a wire rope; 2. a limit stop block; 21. a sleeve body; 22. a baffle plate; 3. a position sensor; 4. a relay.

Detailed Description

The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation. It is to be understood that the described embodiments are merely exemplary of the utility model, and not restrictive of the full scope of the utility model. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The system for monitoring the sliding of the steel wire rope of the container crane comprises the steel wire rope 1, a limit stop 2, a position sensor 3, a relay 4 and an alarm device, wherein the limit stop 2 is fixed on the steel wire rope 1, the position sensor 3 is positioned on one side of the limit stop 2 and used for detecting the displacement of the limit stop 2, and the position sensor 3 is electrically connected with the alarm device through the relay 4 and used for driving the alarm device to give an alarm according to the sliding of the steel wire rope 1.

Through the relative displacement cooperation of position sensor 3 and limit stop 2 so that position sensor 3 obtains the gliding signal of wire rope 1, and then trigger alarm device through relay 4 and send out the police dispatch newspaper, whether gliding real-time supervision appears to wire rope 1 has been realized, technical staff's on-the-spot inspection has been replaced, and protection and warning prompt facility have, greatly reduced because of the not hard up probability that leads to the occurence of failure of wire rope 1, the equipment safety factor has been improved, can reduce the number of times of shutting down because of check-out equipment, technical staff's work load has been reduced simultaneously, holistic work efficiency has been promoted.

Wherein, position sensor 3 can adopt current conventional sensor or travel switch that are used for detecting the article displacement, when wire rope 1 appears sliding, will drive limit stop 2 and remove, and then makes position sensor 3 obtain the gliding signal of wire rope 1.

As a preferred embodiment, the limit stop 2 in this example comprises a sleeve 21 and a baffle 22, the sleeve 21 is fixedly sleeved on the steel wire rope 1, the baffle 22 extends from the side of the sleeve 21, and the position sensor 3 is opposite to the baffle 22. The shutter 22 may be used to contact the position sensor 3 to obtain a signal, or when a position sensor 3 with photoelectric displacement detection capability is employed, the shutter 22 is used to provide a sufficient detection area.

In order to effectively control the signal of the position sensor 3 to the outside, the position sensor 3 and the coil of the relay 4 are connected in series in a control loop, so that the relay 4 triggers an external alarm device and the like to trigger an alarm or controls the crane to stop. Specifically, the normally closed contact of the relay 4 in this example is electrically connected to the alarm device. The alarm device of the embodiment comprises a PLC and an audible and visual alarm electrically connected with the PLC, so that the PLC is used for memorizing the limit stops 2 and the position sensors 3 on the multiple groups of steel wire ropes 1 and correspondingly controlling the triggering of the alarm device or the shutdown of the crane, and the interlocking protection function can be realized.

In one embodiment, the position sensor 3 monitors the condition of the upper limit stop 2 of the steel wire rope 1 in real time, and feeds a detection signal back to the PLC through the relay 4, the PLC judges whether the steel wire rope 1 slides through logic operation, the logic operation can adopt the conventional judgment program, if the judgment result is sliding, a protection mechanism of lifting interlocking is triggered, the lifting and descending functions of the crane are cut off, and an alarm is given on a fault display screen of an audible and visual alarm device, so that accidents are avoided.

In another embodiment, as shown in fig. 1, four limit stoppers 2 are fixed on four steel wire ropes 1 of a front axle, four position sensors 3 and four relays 4 are correspondingly configured, the four relays 4 are normally closed for limiting, and each position sensor 3 monitors the condition of the steel wire rope 1 in real time by detecting the limit stopper 2. When a certain steel wire rope 1 slides, the limit stop 2 fixed on the steel wire rope 1 slides along with the steel wire rope, the corresponding position sensor 3 is triggered to send a signal, the sent action signal is fed back to the corresponding relay 4, the relay 4 inputs the signal into the PLC, the PLC immediately orders about the alarm device to send an alarm, and the lifting function of the crane can be cut off, so that equipment and goods are protected, and accidents are avoided.

The concrete application is as follows: as shown in fig. 1, 2, 3, and 4, if the steel wire rope a slides, the limit stopper on the steel wire rope a slides therewith, the state of the position sensor is changed from normally closed to normally open, the relay AKA1 is opened, the normally closed contact ANC of the relay is opened, the normally closed point IB0001 in the PLC is opened, the coil MD0001 is also opened, the normally open point of the coil MD0001 is closed, and after the normally open point of the coil MD0001 is closed for 2 seconds, the coil 0001 MB is closed, a fault interlock alarm is triggered, the lifting function is cut off, and an alarm is given, so that an accident is effectively avoided.

If many wire rope 1 slide simultaneously, or when any one or more position sensor 3 appears damaging, its normally closed state will become normally open, can trigger the fault interlock warning equally, and technical staff can in time handle, promotes security and work efficiency.

The embodiments of the present invention are not limited thereto, and according to the above-described embodiments of the present invention, other embodiments obtained by modifying, replacing or combining the above-described preferred embodiments in other various forms without departing from the basic technical idea of the present invention and without conflict between the conventional technical knowledge and conventional means in the art are within the scope of the present invention.

Claims

1. The utility model provides a container crane wire rope slip monitoring system, its characterized in that, includes wire rope, limit stop, position sensor, relay and alarm device, and limit stop is fixed in wire rope, and position sensor is located limit stop one side and is used for detecting limit stop's displacement, and position sensor is connected through relay and alarm device electricity for slide according to wire rope and order about alarm device and send out the police dispatch newspaper.

2. The system as claimed in claim 1, wherein the limit stop comprises a housing fixedly attached to the cable and a stop extending from a side of the housing, the position sensor being opposite to the stop.

3. The container crane wireline slippage monitoring system of claim 1, wherein the position sensor is connected in series with the coil of the relay in a control loop.

4. A container crane wireline slippage monitoring system as claimed in claim 3 wherein the normally closed contacts of the relay are electrically connected to an alarm means.

5. The container crane steel wire rope slip monitoring system according to claim 3, wherein the alarm device comprises a PLC and an audible and visual alarm electrically connected with the PLC.