CN101654209A - Safety device against overloading of gantry crane - Google Patents

Abstract

The invention discloses a safety device against overloading of a gantry crane, aiming to overcoming the defects of the safety device against overloading arranged on the existing gantry crane such as high production cost, inconvenient maintenance, higher maintenance cost, poor reliability of outdoor use and short service life. In the operating room on the turntable of the gantry crane, load wire ropes and connected drive mechanisms are arranged on the base of a lifting mechanism by using a winding drum, the bottom surface of the base of the lifting mechanism is hinged with the turntable by using a hinged shaft and hinges, and a pressure sensor of which the contact faces to the bottom surface of the base of the lifting mechanism is fixed on the axial lead side of the hinged shaft of the turntable. As the safety device against overloading of the gantry crane of the invention adopts the parts of the existing device and an added base of the lifting mechanism so as to modify a little bit onthe basis of the existing device and has low production cost; in addition, the device is arranged in the operating room so as to simplify the maintenance, lower the maintenance cost, improve the working condition of the operating room and prolong the service life of the safety device against overloading.

Description

The overload protection device of high pedestal jib crane

Technical field

The invention belongs to the fender guard of elevator machinery, specifically a kind of device that high pedestal jib crane is carried out overload protection.

Background technology

High pedestal jib crane is S5070 type hoisting crane for example, is the Special Hoisting Equipment of building ship and marine oil engineering industry, is provided with main hoisting mechanism and auxiliary hoisting mechanism, and the maximum load up total amount that rises of major and minor lifting mechanism design-calculated is a ton surplus in the of 60.

In order to prevent in lifting cargo because of overload damages elevator machinery, even staff's personal safety accident takes place, high pedestal jib crane all is equipped with overload protection device.The structure of overload protection device is at present: at the Shears top of hoisting crane, be positioned at jib one side from arm of derrick of Shears, set up fixed mount is installed, the top of swing span is supported on the two side of fixed mount with fulcrum, below the bottom of swing span is positioned at swing fulcrum, be supported with the power taking pulley that is pressed against hoist rope one side; Be positioned at the end of leaving Shears one side on fixed mount, be fixed with the pressure sensor that the contact is downward, be electrically connected with computer, the contact of pressure sensor is on the upper surface of swing span;

When a heavy load of high pedestal jib crane overloads, the dynamics that hoist rope is pressed to the power taking pulley increases, force on the swing span that is supported on the fixed mount and put, the upper surface of swing span is pressed to the contact below the sensor, sensor transfers signals to computer through transmitter, behind data handing, deliver to read-out and show weight, meanwhile computer is with the lifting cargo weight of measuring, the lifting amplitude, compare with the rated value in the operating mode that presets, as prescribed is carried out and is shown, actions such as warning and control output, thereby prevented overload crane, avoided the generation of safety misadventure.

Though above-mentioned overload protection device can prevent the generation of overload crane accident, need increase the complicated mechanism of a cover because said apparatus is installed, thereby make the manufacturing cost rising; Simultaneously, said apparatus is arranged on the top of Shears, and installation site height, maintaining inconvenience increase maintenance cost; Moreover, because electronics package is in a high position, it is carried out cover cap close and protect inconvenience, therefore be in open-air running condition, poor reliability all the time; Simultaneously, in the harsh environment that drenches with rain of exposing to the weather, work, shortened the service life of sensor.

Summary of the invention

Technical matters to be solved by this invention is; overcome the overload protection device manufacturing cost height that is provided with on the existing high pedestal jib crane; the inconvenient maintaining in the position that is provided with, maintenance cost height; and the shortcoming that open-air reliability of service is poor, service life is short, a kind of overload protection device of high pedestal jib crane is provided.

In order to solve the problems referred to above that prior art exists, the present invention adopts following technical proposals to realize: on the rotating disk of high pedestal jib crane Shears bottom, be installed in the operator's compartment, with actuating unit bonded assembly hoist rope reel, described and actuating unit bonded assembly hoist rope reel, be installed on the lifting mechanism base with actuating unit, between the bottom surface and rotating disk of lifting mechanism base, connect with the hinge hinge that is parallel to axis of winding drum, be positioned at a side of hinge axial line on the rotating disk, be fixed with the contact towards the lifting mechanism base end face, the pressure sensor that is electrically connected with computer.

The present invention also has following technical characterictic:

The mounting means of described actuating unit and connected reel is with supporting the reel bearing of reel and the base of supporting motive force mechanism, to be fixedly mounted on jointly above the single-piece lifting mechanism base;

Hinged mode is between described lifting mechanism base and the rotating disk, at the lifting mechanism base end face and above the rotating disk, is provided with upper ear seat and lower ear base respectively relatively, and two ear seats are installed relatively, and hinge is through in the earhole of upper and lower ear seat;

Hinged position is between the bottom surface of described lifting mechanism base and the rotating disk, is in corresponding up and down with the axial line of reel;

Described point of connection with hinged lifting mechanism base of hinge and rotating disk is, be distributed in the reel length direction two ends, be positioned at two on the same line of centers, the corresponding setting of pressure sensor with hinge.

The principle of said apparatus overload protection is; when a heavy load of high pedestal jib crane overloads; the reel dynamics that hoist rope is pressed to hoist rope increases; owing to be connected with hinge between the lifting mechanism base end face that supports reel and the rotating disk; force the lifting mechanism base to press to the contact of sensor; by sensor the power of being born is transferred to computer through transmitter; the weight weight that computer is measured; amplitude compares with rated value in the operating mode that presets; as prescribed is carried out and is shown; actions such as warning and control output; thereby can prevent overload crane, avoid the generation of safety misadventure.

Advantage of the present invention and good effect are, because above-mentioned overload protection device, be directly installed on the rotating disk below the hoisting crane Shears and be positioned at operator's compartment, and utilized existing hoist rope reel, only below the reel of hoist rope, increased between one and the rotating disk with hinge bonded assembly lifting mechanism base, on rotating disk, be positioned at a side of hinge again, the fixing pressure sensor that is electrically connected with computer gets final product, do not need to increase other complicated members, structure is very simple, has saved manufacturing cost greatly; Overload protection device is installed in the operator's compartment, and the staff sees at any time, does not also climb to the operation conditions that overload protection device is removed to check in the high-altitude, has guaranteed maintainer's safety, keeps in repair very conveniently, greatly reduces maintenance cost; Overload protection device is arranged in the operator's compartment, and unfavorable factors such as dust and temperature can be effectively controlled, and is in open-air situation than existing, and its working environment has obtained improving greatly, thereby has prolonged the service life of overload protection device.

Description of drawings

Fig. 1 is the scheme drawing of the present invention installation site on high pedestal jib crane;

Fig. 2 is the structure enlarged drawing of overload protection device among Fig. 1;

Fig. 3 is the birds-eye view of the present invention installation site on curl ring.

The specific embodiment

The invention will be further described below in conjunction with drawings and Examples.

Among Fig. 1; on the rotating disk 5 of high pedestal jib crane, operator's compartment 11 is installed; be provided with hoist actuating unit 7 and overload fender guard 4 (referring to Fig. 2, Fig. 3) in the operator's compartment 11; the hoist rope 2 that lifting cargo is used; walk around the assembly pulley of Shears 1 top and lifting jib 6 terminations, its two ends is got back on hoist rope 2 usefulness the reels 3 of the actuating unit 7 that hoists and is fixed.During work, drive reels 3 by the actuating unit 7 of hoisting and rotate,, sling or put down colluding the goods that hangs on the jib 6 cantilever end suspension hooks 6.1 by the loosening or tighten up of hoist rope 2, jib 6 luffings that crane loading is used.

Among Fig. 2; the structure of the overload fender guard of installing in described operator's compartment 11 4 is; the reel 3 of hoist rope 2; be supported on the reel bearing 13 with roll support axle 3.1; with the actuating unit 7 that hoists of reel 3 mechanical connections, be fixed on the base 7.1 of the actuating unit 7 that hoists (referring to Fig. 2, Fig. 3), the reel bearing 13 and the actuating unit base 7.1 that hoists are fixed on the lifting mechanism base 8 jointly; between above the bottom surface of lifting mechanism base 8 and the rotating disk 5, connect with hinge 12 hinges.Be positioned at a side of hinge 12 axial lines on the rotating disk 5, be fixed with bearing 10, the contact is towards the pressure sensor 9 of lifting mechanism base 8 bottom surfaces, and the bottom is fixed on the bearing 10.

Hinged mode is between described lifting mechanism base 8 and the rotating disk 5, correspondence position on lifting mechanism base 8 bottom surfaces and above the rotating disk 5, be provided with upper ear seat 8.1 and lower ear base 5.5 respectively relatively, the relative installation of earhole of upper ear seat 8.1 and lower ear base 5.5, the hinge 12 that is parallel to roll support axle 3.1 is through in the earhole of lower ear base 8.1 and lower ear base 5.5.

In order to make between lifting mechanism base 8 and the rotating disk 5 the bonded assembly position more reasonable, make the reaction of pressure sensor 9 sensitive more, being connected between the bottom surface of described lifting mechanism base 8 and the rotating disk 5, be in cooresponding position about the axial line with reel 3.

During lifting cargo; varying in weight of lifting; the dynamics of pulling hoist rope 2 is also inequality; under the effect of hinge 12, the strength that hoist rope 2 is pressed to pressure sensor 9 by reel 3 drive lifting mechanism bases 8 is also inequality, and pressure sensor 9 passes to computer with different information at any time; analytical calculation through computer; according to setting value hoisting crane is sent instruction, prevent the overload crane operation, thus people, the machine safety of protection hoisting crane in lifting cargo work.

For when reel 3 drives the operation of hoist rope 2 hoisting heavies, make the action of lifting mechanism base 8 Fus more steady, the data that pressure sensor 9 is transferred to computer are also just more accurate, bonded assembly hinge 12 between described lifting mechanism base 8 and the rotating disk 5, the position that is located at reel 3 length directions is, be distributed in reel 3 two ends, on same line of centers two, with two corresponding respectively pressure sensors 9 that are provided with of hinge 12.

The present invention has utilized the physical construction and the parts of existing installation, only makes improvements slightly on its basis, just can be used as the part of the overload protection mechanical device of high pedestal jib crane.Compared with prior art, the parts of Zhi Zuoing significantly reduce in addition, make low cost of manufacture, are convenient to reequip and apply; Said apparatus of the present invention is arranged on that working environment is good, in the lower position operator's compartment of convenient operating maintenance, greatly reduce and safeguard and maintenance cost; In operator's compartment, all are unfavorable for that the factor of work operation of the present invention can both be effectively controlled, thereby have prolonged the service life of overload protection device.

The present invention not only is confined to the listed content of the foregoing description, and every is the conversion of the various ways of purport with flesh and blood of the present invention, all belongs to protection scope of the present invention.

Claims (6)

1; a kind of overload protection device of high pedestal jib crane; comprise above the rotating disk of hoisting crane Shears bottom; be installed in the operator's compartment; with actuating unit bonded assembly hoist rope reel; it is characterized in that: described and actuating unit bonded assembly hoist rope reel; be installed on the lifting mechanism base with actuating unit; between the bottom surface and rotating disk of lifting mechanism base; connect with the hinge hinge that is parallel to axis of winding drum; be positioned at a side of hinge axial line on the rotating disk, be fixed with the contact towards the lifting mechanism base end face; the pressure sensor that is electrically connected with computer.

2, the overload protection device of high pedestal jib crane as claimed in claim 1; it is characterized in that: the mounting means of described actuating unit and connected reel is; with supporting the reel bearing of reel and the base of supporting motive force mechanism, be fixedly mounted on jointly above the single-piece lifting mechanism base.

3, the overload protection device of high pedestal jib crane as claimed in claim 1; it is characterized in that: hinged mode is between described lifting mechanism base and the rotating disk; at the lifting mechanism base end face and above the rotating disk; be provided with upper ear seat and lower ear base respectively relatively; two ear seats are installed relatively, and hinge is through in the earhole of upper and lower ear seat.

4, as the overload protection device of claim 1 or 3 described high pedestal jib cranes, it is characterized in that: hinged position is between the bottom surface of described lifting mechanism base and the rotating disk, is in corresponding up and down with the axial line of reel.

5, the overload protection device of high pedestal jib crane as claimed in claim 1; it is characterized in that: described point of connection with hinged lifting mechanism base of hinge and rotating disk is; be distributed in the reel length direction two ends, be positioned at two on the same line of centers, the corresponding setting of pressure sensor with hinge.

6, the overload protection device of high pedestal jib crane as claimed in claim 4; it is characterized in that: described point of connection with hinged lifting mechanism base of hinge and rotating disk is; be distributed in the reel length direction two ends, be positioned at two on the same line of centers, the corresponding setting of pressure sensor with hinge.

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