CN102320533A

CN102320533A - Dual-loop controlled over winding warning and limiting device

Info

Publication number: CN102320533A
Application number: CN201110258582A
Authority: CN
Inventors: 王淑平
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-09-03
Filing date: 2011-09-03
Publication date: 2012-01-18

Abstract

The invention discloses a dual-loop controlled over winding warning and limiting device. In a working process of the dual-loop controlled over winding warning and limiting device, when a lifting hook lifts a winch, a steel wire rope moves up and down via a through hole of a heavy punch, and when the winch is lifted to be higher than the heavy punch, the lifting hook drives the heavy punch to rise, and the heavy punch loses weight; under the action of a return spring, a rotating arm turns round to be close to non-contact approach switches, and the on-contact approach switches are conducted to work so as to control safety and warning mechanisms to work; with the on-contact approach switch which is high in sensitivity and reliable in work, two identical on-contact approach switches are connected in parallel, the theory of probability shows that two events are less likely to happen simultaneously, so that the two on-contact approach switches are less likely to be failed simultaneously, and if any one of the switches is failed, the other switch still can work regularly, so, the dual-loop controlled over winding warning and limiting device is safe and reliable.

Description

Double-loop controlled overwinding alarming and stopping device

Technical field

The present invention relates to a kind of bont, a kind ofly specifically adopt double loop control, excessive elevator is promoted report to the police and limit a kind of device that stops.

Background technology

At present, the hoist lifting device of on hoisting crane and mine, installing, at work; Tend to promote the accident of pulleying, accident is in case generation will cause fatal crass's heavy losses; To this,, all there is the drawback of poor effect though also there are some preventive devices to occur; To this, also there is not good terms of settlement to occur at present.

Summary of the invention

In order to solve the problem of present lifting pulleying; The invention provides a kind of pulleying alarm limit stop device, this device not only can be reported to the police when running into the lifting pulleying timely; And can control winch and quit work immediately; Can stop to promote the generation of pulleying phenomenon by actv., can guarantee the safety of hoisting crane and mine hoisting facility, the generation of stopping some serious accidents timely.

The present invention realizes that the technical scheme that above-mentioned purpose adopts is: this double-loop controlled overwinding alarming and stopping device comprises: matrix, rotating shaft, pivoted arm, contactless proximity switch, upper limit retaining, extension spring, lower limit retaining, chain, weight, steel rope, suspension hook; One end of this invention pivoted arm is fixedly installed on the matrix through rotating shaft; Pivoted arm is provided with upper limit retaining and lower limit retaining respectively through rotating around the axis on the matrix of both sides about the other end of pivoted arm, the slewing area of pivoted arm is kept off and the restriction of lower limit retaining through upper limit; The two ends of extension spring are individually fixed in an end of matrix and pivoted arm; On the matrix of pole of rotation extreme position above the pivoted arm, fixedly mount two identical contactless proximity switch side by side, contactless proximity switch is connected in the control circuit parallelly connectedly; Weight passes through chain suspension on pivoted arm; Establish the clear opening that vertically communicates up and down above the described pivoted arm, the through hole of steel wire penetrating weight, and the lower end of steel rope is connected fixing with suspension hook.

Beneficial effect of the present invention: the present invention in the course of the work, suspension hook is when promoting elevator, steel rope moves up and down through the through hole of weight, when elevator surpasses the height of weight; Promptly drive weight by suspension hook and rise, make weight lose weight, under the effect of resilience spring, pivoted arm turns round near contactless proximity switch; Contactless proximity switch conducting work, control safety, alarm mechanism work because what adopt is contactless proximity switch, have that sensitivity is higher, the advantage of reliable operation; With two identical noncontacting switch parallel connections, can know that according to the theory of probability two simultaneous possibilities of incident are less; So the possibility of two contactless proximity switch simultaneous system faults is less, and any et out of order; Wherein one still can normal operation, so the present invention has safe and reliable advantage.

Description of drawings

Accompanying drawing 1 is a structure principle chart of the present invention.

Shown in the figure: 1. matrix, 2. rotating shaft, 3. pivoted arm, 4. contactless proximity switch, 5. upper limit retaining, 6. extension spring, 7. lower limit retaining, 8. chain, 9. weight, 10. steel rope, 11. suspension hooks.

The specific embodiment

In the drawings; This double-loop controlled overwinding alarming and stopping device comprises matrix 1, rotating shaft 2, pivoted arm 3, contactless proximity switch 4, upper limit retaining 5, extension spring 6, lower limit retaining 7, chain 8, weight 9, steel rope 10, suspension hook 11, and an end of this invention pivoted arm 3 is fixedly installed on the matrix 1 through rotating shaft 2, and pivoted arm 3 is through 2 rotate around the shaft; Upper limit retaining 5 and lower limit retaining 7 are set respectively on the matrix 1 of both sides about pivoted arm 3 other ends; The slewing area of pivoted arm 3 is passed through upper limit retaining 5 and 7 restrictions of lower limit retaining, and the two ends of extension spring 6 are individually fixed in an end of matrix 1 and pivoted arm 3, on the matrix 1 of pole of rotation extreme position above the pivoted arm 3; Fixedly mount two identical contactless proximity switch 4 side by side; Contactless proximity switch 4 is connected in the control circuit parallelly connectedly, and weight 9 is suspended on the pivoted arm through chain 8, establishes the clear opening that vertically communicates up and down above the described pivoted arm 3; Steel rope 10 passes the through hole of weight 9, and the lower end of steel rope 10 is connected fixing with suspension hook 11.

Claims

1. double-loop controlled overwinding alarming and stopping device; It is characterized in that: this double-loop controlled overwinding alarming and stopping device comprises matrix (1), rotating shaft (2), pivoted arm (3), contactless proximity switch (4), upper limit retaining (5), extension spring (6), lower limit retaining (7), chain (8), weight (9), steel rope (10), suspension hook (11); It is characterized in that: an end of this invention pivoted arm (3) is fixedly installed on the matrix (1) through rotating shaft (2); Pivoted arm (3) is through (2) rotation around the shaft; Upper limit retaining (5) and lower limit retaining (7) are set respectively on the matrix (1) of both sides about the other end of pivoted arm (3); The slewing area of pivoted arm (3) is passed through upper limit retaining (5) and lower limit retaining (7) restriction, and the two ends of extension spring (6) are individually fixed in an end of matrix (1) and pivoted arm (3), on the matrix (1) of pivoted arm (3) top pole of rotation extreme position; Fixedly mount two identical contactless proximity switch (4) side by side; Contactless proximity switch (4) is connected in the control circuit parallelly connectedly, and weight (9) is suspended on the pivoted arm through chain (8), and described pivoted arm is established the clear opening that vertically communicates up and down above (3); Steel rope (10) passes the through hole of weight (9), and the lower end of steel rope (10) is connected fixing with suspension hook (11).