SU870348A1 - Device for control of motion of windlass flexible body - Google Patents

Description

154) DEVICE FOR THE CONTROL OF MOVEMENT OF THE FLEXIBLE WINCH ORGAN

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The invention relates to the field of hoisting and transport machinery, namely, to safety devices of winches and can be used to control the movement of the flexible body of the winch.

A device for controlling the movement of a flexible organ is known, which contains an inductive sensor mounted in the zone of movement of the flexible organ on which magnetic labels M are applied at regular intervals.

It is also known a device for controlling the movement of a flexible winch organ, comprising an inductive sensor mounted in the zone of movement of the flexible organ, which is magnetically spaced at regular intervals, as well as a control circuit for the drive of the winch, to which the output indicator of the flex indicator of the flexible organ, amplifier and switch 2 are connected .

A disadvantage of the known devices is the comparatively low reliability of the operation of the winch when ejecting a flexible organ.

The purpose of the invention is to increase the reliability of the winch when pushing a flexible body.

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The goal is achieved by the fact that the pointer of the movement of the flexible organ and the switch, respectively, consist of a SH-NE element and a counting trigger, a waiting multivibrator and a 2I-2IL element, and the amplifier is made in the form of a pulse shaper, whose input is connected to the output of the counting trigger, exit - with entrance

15 standby multivibrator, the output of which is connected to the input of the SCHNE element, and the second output to the input of the element 2И-2ИЛИ, the output of which is connected to the input of the counting trigger,

the output of which is connected to the second; the input of element 2I-2ILI, and the second output - to the second input of the element NLI-NOT, the output of the inductive sensor is connected to the third and fourth inputs of the element 2I-2ILI. The invention is illustrated in the drawing, which shows the electrical circuit of the device and the location of the winch drum. A device for controlling the movement of a flexible winch member contains an inductive counter 1 installed in the zone of movement of the flexible member 2, which is wound on a winch drum 3 installed in an airtight housing 4 in which a hole 5 is made for a flexible member 2 and an opening 6 for supplying water with a pump 7 The magnetic tags 8 are applied to the body 2 at equal intervals. With the winch drive control circuit (not shown), the output of the movement indicator of the flexible organ consisting of the element 9 OR NOT is connected. The device amplifier is made in the form of a pulse driver 10, the switch consists of a counting trigger 11, waiting for multivibrator 12 and element 13 2И-2ИЛИ. The input of the imaging unit 10 is connected to the output 14 of the trigger 11, and the output to the input of the multivibrator 12, the output 15 of which is connected to the input 16 of the element 9, and the second output 17 to the input 18 of the element 13, the output of which is connected to the input of the trigger 11, the output 14 of which is connected with the second input 19 of element 13, and the SECOND output 20 with the second input 2I of element 9, the output of sensor 1 is connected to the third 22 and fourth 23 inputs of element 13. Magnetic labels can be made, for example, in the form of a strip of ferromagnetic material, fixed on a flexible organ 2. The device works to duly .. Before the start of etching, the trigger 11 is set to the state O by input signal R, after which the pump 7 and the winch drive are turned on, when the pump 7 is operated in the housing 4, an overpressure is created, under the action of which the organ 2 is pushed out through the opening 5. Uteri 8, a passage in the immediate vicinity of sensor 1, installed near the opening 5, causes an impulse to appear at the output of sensor 1. This impulse arrives at inputs 22 and 23 of element 13. Because of this, input 1 of element 13 receives a signal 1 from exit 17 multi bratra 12. then, at the output of element 13, the Wits signal equal to logical unit 1, which goes to the counting input of trigger 11, as a result of which the latter changes to another state, after which the latter transitions to another state, after which the driver 10 outputs a short pulse that triggers the waiting multivibrator 12. Duration T | The output pulse of the standby multivibrator 12 is determined by the following relation: T ... missions where, is the lower limit of the speed of the elongation of the flexible organ, 6 is the distance between the marks. The value 1 is determined from the ratio 1 "L, where L is the circumference of the flange of the drum 3 of the winch. As a result, during the time of exit 15 of multivibrator 12, signal 1 will be output, output 17 will be O. At that, the signal at input 16 of element 9 (LONG-NOT) is 1, therefore the signal at output of element 9 is O, If the speed of the body 2 is etched norm, then by the time the next mark 9 passes and the next pulse appears at the inputs 22.23 of element 13, the considered state of the circuit will not change. Consequently, the signal at input 19 of element 3 is 1, therefore, at the output of element 13, a pulse returns the trigger 11 to the state O. At this, the signal at input 19 of element 13 becomes equal to 0 and at input 21 of element 9 - 1, as a result at the output of element 9, the signal will be equal to 0. If during the time T, the .MHMO sensor passes three or more marks 8, then the third and following pulses at the inputs 22.23 of element 13 do not change the state of the circuit, because at the inputs 19 and 18 of the element 13 signals are equal to O. At the expiration of interval 1, multivibrator 12 returns to its original state, in re As a result, the signal 1 appears at the input 18 of the element 13. If, for any reason, the etching rate starts to fall, then the time intervals for the pulp will increase.

The third pulse at the inputs 22,23 of the element 13 overturns the trigger 11 to the state 1, which leads, as described above, to the start of the sliding multivibrator 12.

If the etching rate has become less than the minimum allowable, then the multivibrator 12 will return to its original state before the fourth pulse arrives. As a result, at both inputs of the logic element 9, the signals will be equal to O, and at the output of element 9, signal 1 will turn on, indicating an unacceptable reduction in the rate of etching. After the fourth pulse appears, the trigger 11 returns to state O, signal 1 appears at the lower input of element 9, and output O appears. The signal from element 9 output enters the winch drive control circuit to brake the latter.

Claims (2)

1. USSR author's certificate № 122593, Yul. B 66 B 3/02, 30.06.58. 2. USSR author's certificate No. 133993, cl. B 66 B 3/02, 25.01.60 (prototype).  BUT AghigI