CN2818432Y

CN2818432Y - Weight limitor of crane

Info

Publication number: CN2818432Y
Application number: CN 200520083502
Authority: CN
Inventors: 路华明; 张良; 黄万舸; 王平
Original assignee: 路华明
Priority date: 2005-05-24
Filing date: 2005-05-24
Publication date: 2006-09-20
Anticipated expiration: 2015-05-24

Abstract

The utility model relates to a weight limiter for cranes, which belongs to the technical field of weight limiting devices used in hoisting equipment. The utility model is characterized in that the utility model comprises a power supply 1, a current detector 2, a mast angular variation signal detector 3, a superimposer 4, signal processors 7 and 8 and an alarm; the signal output ends of the current detector 2 and the mast angular variation signal detector 3 are connected with the signal input end of the superimposer 4; the signal output end of the superimposer 4 is orderly connected with the signal processor and the alarm in series; the power supply 1 is respectively connected with the current detector, the mast angular variation signal detector, the superimposer, the signal processor and the alarm. The utility model can adapt to the elevating capacity of turn mast cranes which continuously varies. The utility model has the functions that the utility model can control the current of motors of hoisting equipment or the output power of hoisting equipment and can adapt to the elevating capacity of turn mast cranes which continuously varies. The utility model has the advantages that alarm points can be arranged at will; the control time of alarming signals can be regulated.

Description

Hoisting crane weight limits device

One, technical field

The utility model relates to a kind of hoisting crane weight limits device, belongs to the weight limits device technique field that weight-lifting equipment uses.

Two, background technology

The revolution derrick crane often changes because of its mast elevation angle, its rated load weight is also corresponding to change, traditional hoisting crane weight limits device can only work to fixing a certain weight numerical value, and the hoisting capacity that the revolution derrick crane is constantly changed then can not meet the demands.

Three, summary of the invention

The utility model provides a kind of can overcome the above defective, can adapt to the hoisting crane weight limits device of the hoisting capacity that constantly changes of revolution derrick crane.

The utility model is achieved through the following technical solutions:

Hoisting crane weight limits device of the present utility model, comprise two sensors, the weight signal of sensor motor current signal or hoisting crane, this signal is delivered to superimposer after amplifying, another sensor changes the angle of mast by mechanical linkage and is converted to electric signal, again this signal is delivered to superimposer after amplifying, superpose, handle after the stack with another road signal; According to the result output alarm signal, this signal can be two or more variant or identical signals (pre-alarm signal, alerting signal), and can carry out time delays to output signal and handle.

Hoisting crane weight limits device, its special character is to include power supply, current probe, mast angular rate signal detector, superimposer, signal processor and annunciator, the signal output part of current probe, mast angular rate signal detector connects the signal input part of superimposer, the signal output part of superimposer is connected successively with signal processor and annunciator, and power supply is connected with current probe, mast angular rate signal detector, superimposer, signal processor, annunciator respectively;

Described current probe adopts current sensor CT, the current signal detector that also can adopt the inductance current transformer to constitute, the current signal conv that also can adopts pressure sensor constitutes, the input end of current probe is connected in the stator circuit of electrical motor, and its mouth is connected with the signal input part of superimposer;

Described mast angular rate signal detector adopts mechanical linkage that the angle of mast is changed the electric signal that is converted to by pressure sensor PT or pulling force sensor or photoelectric commutator output, and its mouth is connected with the signal input part of superimposer;

Described superimposer adopts integrated amplifier and peripheral direct current configuration circuit thereof to constitute;

Described mechanical linkage comprise the shell fixing, the rotating shaft of captiveing joint with shell with mast, with the cross bar of the bull stick of rotating shaft flexible connection and weight, the band spring of captiveing joint with bull stick and with cross bar and the hard-wired sensor of shell;

Also be respectively equipped with amplifier between current probe and mast angular rate signal detector and superimposer, amplifier adopts integrated amplifier and peripheral direct current configuration circuit thereof to constitute;

Can also be respectively equipped with power governor before the above-mentioned amplifier;

Described signal processor adopts amplifier circuit, and amplifier circuit adopts integrated amplifier and peripheral direct current configuration circuit thereof to constitute, and annunciator adopts aerotron conducting cut-off circuit and drives control relay circuit and constitutes;

Described annunciator divides two-stage, is pre-alarm output control circuit and warning output control circuit formation;

In order to regulate time of fire alarming easily, between amplifier circuit and annunciator, also can be provided with the time control circuit that constitutes by integrated comparator and peripheral direct current configuration circuit thereof.

Hoisting crane weight limits device of the present utility model, by detected motor current signal and mast angular rate signal are handled, according to variant or identical two or more signals (the pre-alarm signal of result output, alerting signal), and can carry out time delays to output signal and handle, can adapt to the hoisting capacity that the revolution derrick crane constantly changes, have and to control weight-lifting equipment current of electric or weight-lifting equipment horsepower output and adapt to the function that revolution derrick crane hoisting capacity constantly changes, and have alarm set point and can be provided with arbitrarily, the advantage that the alerting signal period is adjustable.

Four, description of drawings

Fig. 1: the utility model optimum implementation mechanical linkage scheme drawing;

Fig. 2: the utility model optimum implementation mast scheme drawing;

Fig. 3: the utility model optimum implementation block diagram;

Fig. 4: the utility model optimum implementation schematic circuit diagram.

Five, the specific embodiment

With reference to figure 1-4, the utility model optimum implementation is as follows:

The hoisting crane weight limits device of the present embodiment, include power supply 1, current probe 2 has been linked in sequence, power governor 11, amplifier 5 is to superimposer 4 signal input parts, mast angular rate signal detector 3 has been linked in sequence, power governor 12, amplifier 6 is to superimposer 4 another signal input parts, the superimposer 4 signal output parts signal processor 7 that has been linked in sequence, pre-alarm output control circuit 9, superimposer 4 another signal output parts signal processor 8 that has been linked in sequence, time control circuit 13, warning output control circuit 10, power supply 1 are connected with above each active parts respectively;

Current probe 2 adopts current sensor CT, the current signal detector that also can adopt the inductance current transformer to constitute, and the current signal conv that also can adopts pressure sensor constitutes, the input end of current probe is connected in the stator circuit of electrical motor; Mast angular rate signal detector 3 adopts mechanical linkage that the angle of mast is changed the electric signal that is converted to by pressure sensor PT or pulling force sensor or photoelectric commutator output; Superimposer 4 adopts integrated amplifier A3 and peripheral direct current configuration circuit thereof to constitute;

Amplifier

5 and 6 adopts integrated amplifier A1, A2 and peripheral direct current configuration circuit thereof to constitute;

Signal processor

7 and 8 adopts amplifier circuit, and amplifier circuit adopts integrated amplifier A4, A5 and peripheral direct current configuration circuit thereof to constitute, and annunciator adopts aerotron conducting cut-off circuit and drives control relay circuit and constitutes; Annunciator is divided into two-stage, constitute by pre-alarm output control circuit 9 and warning output control circuit 10 respectively, pre-alarm output control circuit 9 adopts aerotron BG2 conducting cut-off circuit and relay K A1 control circuit to constitute, and warning output control circuit 10 adopts aerotron BG1 conducting cut-off circuit and relay K A2 control circuit to constitute; Between signal processor 8 and warning output control circuit 10, be provided with the time control circuit 13 that constitutes by integrated comparator A6 and peripheral direct current configuration circuit thereof;

Mechanical linkage 20 comprise the shell 21 fixing, the rotating shaft 22 of captiveing joint with shell with mast 28, with the cross bar 26 of the bull stick 23 of rotating shaft flexible connection and weight 24, the band spring 25 of captiveing joint with bull stick 23 and with cross bar and the hard-wired sensor 27 of shell; When the mast angle changes, mechanical linkage shell 21 is along with mast changes synchronously, rotate with movable bull stick 23 of rotating shaft 22 bonded assemblys and weight 24 this moment, weight all the time vertically downward, driving the cross bar 26 of captiveing joint with bull stick moves, pressure to sensor 27 changes, and sensor output electric signal changes;

When detected motor current signal reached the pre-alarm specified value, relay K A1 control loudspeaker were reported to the police, and when detected motor current signal reached the warning specified value, weight-lifting equipment motor power circuit is reported to the police, cut off simultaneously to relay K A2 control loudspeaker.

The present embodiment hoisting crane weight limits device, by detected motor current signal and mast angular rate signal are handled, according to the alert signal of two or more variant or identical signal predictions of result output, alerting signal, and can carry out time delays to output signal and handle, can adapt to the hoisting capacity that the revolution derrick crane constantly changes, have and to control weight-lifting equipment current of electric or weight-lifting equipment horsepower output and adapt to the function that revolution derrick crane hoisting capacity constantly changes, and have alarm set point and can be provided with arbitrarily, the advantage that the alerting signal period is adjustable.

Claims

1, hoisting crane weight limits device, it is characterized in that including power supply (1), current probe (2), mast angular rate signal detector (3), superimposer (4), signal processor (7), (8) and annunciator, current probe (2), the signal output part of mast angular rate signal detector (3) connects the signal input part of superimposer (4), the signal output part of superimposer (4) and signal processor (7), (8) and annunciator connect successively, power supply (1) respectively with current probe, mast angular rate signal detector, superimposer, signal processor, annunciator connects.

2, according to the described hoisting crane weight limits of claim 1 device, it is characterized in that described current probe (2) adopts current sensor (CT), the current signal detector that also can adopt the inductance current transformer to constitute, the current signal conv that also can adopts pressure sensor constitutes, the input end of current probe is connected in the stator circuit of electrical motor, and its mouth is connected with the signal input part of superimposer.

3, according to the described hoisting crane weight limits of claim 1 device, it is characterized in that described mast angular rate signal detector (3) adopts mechanical linkage that the angle of mast is changed the electric signal that is converted to by pressure sensor (PT) or pulling force sensor or photoelectric commutator output, its mouth is connected with the signal input part of superimposer.

4,, it is characterized in that described superimposer (4) adopts integrated amplifier and peripheral direct current configuration circuit thereof to constitute according to the described hoisting crane weight limits of claim 1 device.

5, according to the described hoisting crane weight limits of claim 3 device, it is characterized in that mechanical linkage (20) comprise the shell (21) fixing, the rotating shaft (22) of captiveing joint with shell with mast (28), with the cross bar (26) of the bull stick (23) of rotating shaft flexible connection and weight (24), the band spring (25) of captiveing joint with bull stick (23) and with cross bar and the hard-wired sensor of shell (27).

6, according to the described hoisting crane weight limits of claim 1 device, it is characterized in that also being provided with amplifier (5), (6) between current probe (2) and mast angular rate signal detector (3) and superimposer (4), amplifier (5), (6) adopt integrated amplifier and peripheral direct current configuration circuit to constitute.

7,, it is characterized in that described amplifier (5), (6) also are respectively equipped with power governor (11), (12) before according to the described hoisting crane weight limits of claim 6 device.

8, according to the described hoisting crane weight limits of claim 1 device, it is characterized in that described signal processor (7), (8) employing amplifier circuit, amplifier circuit adopts integrated amplifier and peripheral direct current configuration circuit to constitute, and annunciator adopts aerotron conducting cut-off circuit and drive control relay circuit to constitute.

9, according to the described hoisting crane weight limits of claim 1 device, be characterised in that described annunciator is divided into two-stage, constitute by pre-alarm output control circuit (9) and warning output control circuit (10) respectively.

10,, it is characterized in that between signal processor (8) and warning output control circuit (10), also can being provided with the time control circuit (13) that constitutes by integrated comparator and peripheral direct current configuration circuit thereof according to the described hoisting crane weight limits of claim 9 device.