A safety protection system for down belt conveyor

A belt conveyor, safety protection technology, applied in the direction of electric speed/acceleration control, etc., can solve the problems of speeding and acceleration, and achieve the effect of avoiding speeding

Active Publication Date: 2020-02-28
HUADIAN HEAVY IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, after a power failure occurs on the down belt conveyor, due to the large mechanical energy of the material, it will accelerate downward and cause a speeding phenomenon.

Method used

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  • A safety protection system for down belt conveyor
  • A safety protection system for down belt conveyor
  • A safety protection system for down belt conveyor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] This embodiment provides a safety protection system for a belt conveyor, see figure 1 , showing its structural schematic diagram, including: speed switch, relay, safety relay and DC power supply U, wherein,

[0026] The DC power supply U, the normally closed contact 11 of the speed switch and the coil K1 of the relay are connected in series to form a signal input loop;

[0027] The input channel of the safety relay is connected to the normally open contact K2 of the relay, the DC power input channel of the safety relay is connected to the DC power U, and the normally open contact channels of the safety relay are respectively connected in series to the Describe the steering valve circuit of the brake hydraulic system of the down conveyor and the auxiliary contact circuit of the brake pump motor contactor;

[0028] The monitoring device 12 of the speed switch monitors the belt speed of the down belt conveyor, and controls the normally closed contact 11 to open when the b...

Embodiment 2

[0032] This embodiment provides another safety protection system for a down belt conveyor, see figure 2 , shows a schematic structural diagram of the system, wherein the safety relay is a dual-channel safety relay, that is, the safety relay includes two input channels, wherein one input channel is composed of terminal S11 and terminal S12, and the relay is connected between S11 and S12 The normally open contact K2 of the safety relay; the other input channel is composed of terminal S21 and terminal S22, and the normally open contact K3 of the relay is connected between S21 and S22; the normally open contact channel of the safety relay also includes two, one normally open The contact channel is composed of terminal 13 and terminal 14, and terminal 13 and terminal 14 are connected in series in the steering valve circuit of the brake hydraulic system; the other normally open contact channel is composed of terminal 33 and terminal 34, and terminal 33 It is connected in series wit...

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PUM

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Abstract

The invention provides a safety protection system of a downward belt conveyor, comprising a speed switch, a safety relay and a DC power, wherein the monitoring device of the speed switch detects the belt speed of the conveyor; when the belt speed is greater than the preset speed threshold value, the normally-closed contact of the speed switch is controlled to be opened, and then the signal input loop composed of the normally-close contacts of the DC power and speed switch and the coils of the relay is disconnected; the coil of the relay is in power failure; the normally-opened contact of the relay is disconnected; the normally-opened contact of the safety relay is disconnected, so the auxiliary contact loop of the brake pump motor is disconnected; the brake pump motor stops working; the conversion valve loop is disconnected; the reversing valve is reversed to one-circuit oil circuit of an overflow valve and a speed regulating valve, and then band-type brake action is realized, and the belt stops moving. After the downward belt conveyor is in power failure, the speed switch detects great belt speed, and the hydraulic brake system sends the signal to realize band-type brake and avoid flying phenomenon.

Description

technical field [0001] The invention relates to the technical field of belt conveyors, and more specifically, relates to a safety protection system for a belt conveyor that is carried down. Background technique [0002] Belt conveyor is one of the most powerful conveying equipment in contemporary times. It is the most widely used equipment in the whole conveyor category. Now it has been widely used in metallurgy, mining, cement, wharf, chemical industry, food and other industries. According to the transport direction of the conveyed material, the belt conveyor is divided into upper transport and lower transport. In the past, due to the high safety of the upper belt conveyor, it has been widely used. With the application and development of belt conveyors in the field of bulk material transportation systems, it is often difficult to avoid the down transportation mode in the design of long-distance and large-capacity transportation systems. Grid transmission has great economi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05D13/62
CPCG05D13/62
Inventor 谷盛王凯金烨张绍立林鹤然徐立楠舒畅牛玉辉
Owner HUADIAN HEAVY IND CO LTD
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