CN2381627Y - Multifunctional safety device for tower crane - Google Patents

Abstract

The utility model relates to a safety device, particularly relates to the safety device for a tower crane, which belongs to the field of machinery. The utility model is mainly composed of a load moment limiter and an amplitude and height limiter. The special point lies in that the load moment limiter adopts the working principle of a single steel plate stress deformation, and a sampling and a control mechanism are arranged together. The utility model has simple structure, convenient maintenance, convenient adjustment, small size, compact structure, large transmission ratio, definition, accuracy and long service life. The amplitude and height limiter adopts small modulus worm gear and worm drive, the utility model is provided with an amplitude indicating device, the utility model samples mechanically, and the utility model has electric display.

Description

Tower crane multifunctional safe device

The utility model relates to a kind of safety device, and a kind of safety device that especially uses on the tower crane belongs to mechanical field.

At present, the tower crane (hereinafter to be referred as the tower machine) that construction site uses have a quite a lot of part because of generation production year early, just do not have any safety device when dispatching from the factory; The original safety device of some tower machine lost efficacy, was difficult for again repairing; Also some tower machine has safety device, in use and safety inspection, find to exist the following weak point, the one, the sampling mechanism of load moment limiter is connected apart from longer with control mechanism, and be resiliently to be flexible coupling, the less stable that works together is not easy to debugging again, and, the some of them parts damage easily, and service life is short; The 2nd, the connection mode design of amplitude, height limitator and equipment is not too reasonable, and during installation, concentricity is difficult for adjusting, and is easy in use lose efficacy; The 3rd, no amplitude indicating device at present on the tower machine that use the camp site, seldom is equipped with stable performance, clear and accurate amplitude and hoisting capacity read out instrument, and is therefore when operating luffing mechanism, entirely with range estimation, not only dangerous but also be unfavorable for improving work efficiency.

The purpose of this utility model is intended to overcome the deficiency of above-mentioned prior art, and a kind of rational in infrastructure, safe and reliable, tower crane multifunctional safe device of being convenient to safeguard debugging, long service life is provided.

For achieving the above object, the technical solution adopted in the utility model is: a kind of tower crane multifunctional safe device, mainly by load moment limiter and amplitude, height limitator is formed, its special character is that load moment limiter has adopted single steel plate structure, sensing mechanism is located at control mechanism, its main constituent elements has sampling steel plate and weldering adjustable bolt thereon, micro-switch, support and two switch adapter plates, control the cable that hoists, control luffing cable etc., the two ends of sampling steel plate are welded on the main device for carrying a tripot bar of tower cap one side, switch bracket is welded on the main device for carrying a tripot bar at sampling steel plate middle part, two switch adapter plates all are fixed by bolts on the switch bracket, rubber plate is installed between micro-switch and the switch adapter plate, one of control luffing cable terminates on the normally closed contact of a micro-switch, the other end is serially connected in luffing mechanism in the contactor control loop of direction significantly, controlling the cable one that hoists terminates on the normally closed contact of another micro-switch, the other end is serially connected in the contactor control loop of master file phase ascent direction, hoisting moment gives alert cable one and terminates on the normally closed contact of the 3rd micro-switch, and the other end is connected in the warning device loop; Amplitude, height limitator have adopted little modulus worm gear, worm drive, and be provided with the amplitude indicating device that utilizes mechanical sampling, electric demonstration, and the amplitude limiting device is installed on the carriage amplitude varying volume camera, and height limitator is installed on the volume camera that hoists; The structure of the two is the same substantially, mainly form by worm screw, worm gear, worm-wheel shaft, friction disc, cam, micro-switch, support and outer cover, worm screw is connected with volume camera drum shaft by universal-joint or sprocket wheel, reel rotates and has driven worm screw, worm gear rotates, friction disc and worm-wheel shaft rotate synchronously, friction disc drives cam by rubber pad again and rotates together, and cam can be adjusted angle arbitrarily; Amplitude indicating device and amplitude limiting device are contained in the mechanism, its running part and limiting device are synchronous, taked mechanical sampling, electric demonstration, it is mainly by worm screw, worm gear, worm-wheel shaft, the wiping dish, the wiping bar, the contact, contact and positive wire, cathode conductor, composition such as terminal clamp and LED, installed a wiping bar that angle can be adjusted arbitrarily additional in the outside of worm-wheel shaft overhead cam, the one end is equipped with a copper contact and is connected with 3 volts of power cathodes, on the bearing in the outside of wiping bar, a wiping dish is housed, be the contact of in the circumference of radius several adjustable distances being housed with the wiping bar above, series connection luminotron in each contact also links to each other with the positive pole of 3 volts of power supplys.

The utility model compared with the prior art, the advantage that has is:

1, load moment limiter has adopted the principle of work of single steel plate stress deformation, and sampling is located at control mechanism, simple structure, and stable performance is convenient to safeguard debugging that fault rate is low, and is safe and reliable.

2, amplitude, height limitator have adopted little modulus worm gear, worm drive, so the small volume structure compactness, and transmitting ratio is big, and is applied widely.

3, the amplitude indicating device adopts mechanical sampling, electric demonstration, so clear display is accurate, long service life.

4, safety device with adopted two cover transmission schemes being connected of tower machine, make it not only can be used for producing new machine, and can transform or install additional, thereby guaranteed the safe reliability of producing old machine.

Below in conjunction with drawings and Examples the utility model is described in further detail.

Fig. 1 is the structural representation of load moment limiter.

Fig. 2 is the birds-eye view of load moment limiter.

Fig. 3 is the sectional structure cutaway view of amplitude, height limitator.

Fig. 4 is the front view of amplitude, height limitator.

The electric hookup that Fig. 5 shows for amplitude.

Fig. 6 is the multifunction display scheme drawing.

Fig. 7 is the warning electrical schematic diagram.

Fig. 8 is each safety device installation site scheme drawing on the tower machine.

As shown in Figure 1 and Figure 2, the main constituent elements of load moment limiter has sampling steel plate 2 and weldering adjustable bolt 8, micro-switch 3, support 6 and switch adapter plate 5,7 etc. thereon.

The two ends of sampling steel plate 2 are welded on the main device for carrying a tripot bar 1 of tower cap one side, switch bracket 6 is welded on the main device for carrying a tripot bar 1 at sampling steel plate 2 middle parts, switch adapter plate 5,7 are fixed by bolts on the switch bracket 6, rubber plate 4 is installed between micro-switch 3 and the switch adapter plate 5, one of control luffing cable 11 terminates on the normally closed contact of a micro-switch, the other end is serially connected in luffing mechanism in the contactor control loop of direction significantly, controlling the cable 10 1 that hoists terminates on the normally closed contact of another micro-switch, the other end is serially connected in the contactor control loop of master file phase ascent direction, hoisting moment gives alert cable 9 one and terminates on the normally closed contact of the 3rd micro-switch, and the other end is connected in the warning device loop.When tower machine hoisting heavy, after the tower cap is stressed, main device for carrying a tripot bar 1 produces distortion, be welded in the also flexural deformation thereupon of sampling steel plate 2 on the main device for carrying a tripot bar 1, it is heavy more to hang thing, work range is big more, 2 flexural deformations of sampling steel plate are big more, unload heavy back sampling steel plate 2 and restores to the original state again, therefore adjust adjustable bolt 8 on the steel plate 2 of taking a sample and the distance between three micro-switch contacts on the support 6, when hanging thing and reach the 105%-110% of specified hoisting moment, adjustable bolt is just touched micro-switch, hoisting moment gives alarm device and sends warning light and sound equipment signal, has cut off the drop hanger ascent direction simultaneously and to the power supply of direction luffing significantly, has guaranteed tower machine non-overloading.

As shown in Figure 3, Figure 4, amplitude structurally is the same with height limitator substantially, and just one is installed on the carriage amplitude varying volume camera, and one is installed on the volume camera that hoists; Mainly form by worm screw 12, worm gear 13, worm-wheel shaft 14, friction disc 15, cam 16, micro-switch 17, support 18 and outer cover 19.Worm screw is connected with volume camera drum shaft by universal-joint or sprocket wheel, reel rotates and has driven worm screw, worm gear rotates, friction disc and worm-wheel shaft rotate synchronously, friction disc drives cam by rubber pad again and rotates together, cam can be adjusted angle arbitrarily, so just the straight-line motion of drop hanger or amplitude variation trolley having been become cam rotatablely moves on axle slowly, adjusting cam rises or amplitude variation trolley runs to specialized range when interior to drop hanger, just touch the power supply of micro-switch, thereby reach the effect of protection with rising of cut-out drop hanger or luffing mechanism.

Amplitude indicating device and amplitude limiting device are contained in the mechanism, its running part and limiting device are synchronous, taked mechanical sampling, electric demonstration, as Fig. 4, shown in Figure 5, it mainly is made up of worm screw 12, worm gear 13, worm-wheel shaft 14, wiping dish 20, wiping bar 21, contact 22, contact 23 and positive wire 24, cathode conductor 25, terminal clamp 26 and LED etc.; As shown in Figure 4, installed a wiping bar 21 that angle can be adjusted arbitrarily additional in the outside of worm-wheel shaft 14 overhead cams, the one end is equipped with a copper contact 23 and is connected with 3 volts of power cathodes, on the bearing in the outside of wiping bar 21, a wiping dish 20 is housed, be the contact 22 of in the circumference of radius several adjustable distances being housed with wiping bar 21 above, series connection luminotron in each contact also links to each other with the positive pole of 3 volts of power supplys, when the wiping bar rotates with worm-wheel shaft, just contact with any one contact on the wiping dish, just light a luminotron, adjust the spacing of pairing contact according to the distance of amplitude variation trolley, so just the change in location of amplitude variation trolley on crane arm can be shown from telltale, to also show in following the rated load that should lift by crane of this amplitude simultaneously, the driver is known what's what, prevent that the accident that overloads from taking place, and can improve work efficiency.

Multifunction display 6 in Fig. 6 mainly is made up of shell, panel, vertoro PC, LED, connection terminal and alarm sound Chinese percussion instrument, it is the sampling of each device to be connected by multicore flexible cable 26 be transported to the inside, and on display panel, show, amplitude indication green luminotron, other three kinds is red luminotron, and Presentation Function shows work range M and corresponding rated load weight T; Warning function is reported to the police, is reported to the police and master file reel anticreep rope warning mutually near amplitude peak for super moment, its alarm principle is given alert micro-switch open contact 30, anticreep rope micro-switch open contact 29, is formed near amplitude peak micro-switch open contact 32, three LEDs and a news sound device 31 by moment as shown in Figure 7.

Provide the installation site of each safety device on tower crane at last as shown in Figure 8,37 is tower crane among the figure, 33 multifunction displays, and 34 is amplitude limiting device and amplitude indicating device, and 35 is load moment limiter, and 36 is height limitator.

Claims (1)

1. A kind of tower crane multifunctional safe device, mainly by load moment limiter and amplitude, height limitator is formed, it is characterized in that load moment limiter has adopted single steel plate structure, sensing mechanism is located at control mechanism, its main constituent elements has sampling steel plate (2) and weldering adjustable bolt (8) thereon, micro-switch (3), support (6) and switch adapter plate (5), (7), control the cable (10) that hoists, control luffing cable (11) etc., the two ends of sampling steel plate (2) are welded on the main device for carrying a tripot bar (1) of tower cap one side, switch bracket (6) is welded on the main device for carrying a tripot bar (1) at sampling steel plate (2) middle part, switch adapter plate (5), (7) be fixed by bolts on the switch bracket (6), rubber plate (4) is installed between micro-switch (3) and the switch adapter plate (5), one of control luffing cable (11) terminates on the normally closed contact of a micro-switch, the other end is serially connected in luffing mechanism in the contactor control loop of direction significantly, controlling the cable (10) that hoists terminates on the normally closed contact of another micro-switch, the other end is serially connected in the contactor control loop of master file phase ascent direction, hoisting moment gives alert cable (9) and terminates on the normally closed contact of the 3rd micro-switch, and the other end is connected in the warning device loop; Amplitude, the structure of height limitator is the same, the amplitude limiting device is installed on the carriage amplitude varying volume camera, height limitator is installed on the volume camera that hoists, its main constituent elements has worm screw (12), worm gear (13), worm-wheel shaft (14), friction disc (15), cam (16), micro-switch (17), support (18) and outer cover (19), worm screw is connected with volume camera drum shaft by universal-joint or sprocket wheel, reel rotates and has driven worm screw, worm gear rotates, friction disc and worm-wheel shaft rotate synchronously, friction disc drives cam by rubber pad again and rotates together, and cam can be adjusted angle arbitrarily; Amplitude indicating device and amplitude limiting device are contained in the mechanism, its running part and limiting device are synchronous, mainly by worm screw (12), worm gear (13), worm-wheel shaft (14), wiping dish (20), wiping bar (21), contact (22), contact (23) and positive wire (24), cathode conductor (25), compositions such as terminal clamp (26) and LED, installed a wiping bar (21) that angle can be adjusted arbitrarily additional in the outside of worm-wheel shaft (14) overhead cam, the one end is equipped with a copper contact (23) and is connected with 3 volts of power cathodes, on the bearing in the outside of wiping bar (21), a wiping dish (20) is housed, be the contact (22) of in the circumference of radius several adjustable distances being housed with wiping bar (21) above, series connection luminotron in each contact also links to each other with the positive pole of 3 volts of power supplys.

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