Unattended monitoring system for brake shoe clearance protection of coal mine hoist

  Shandong Meian mining equipment Co
, Ltd
supplies hoist brake shoe clearance protection device, brake clearance online monitoring device, coal mine signal centralized closing system, electric locomotive driverless, trackless rubber tyred vehicle stall protection device, life cycle health management of important coal mine equipment, on-line monitoring and fault intelligent diagnosis of large equipment, comprehensive protection device for mining electric locomotive, locomotive anti rear collision, Coal mine electromechanical equipment operation status monitoring, fault diagnosis, pneumatic driver controlled turnout device
Functions that can be completed by displacement monitoring sensor, brake oil pressure sensor, plug-in junction box and 10
4-inch human interface of brake shoe clearance protection device of mine hoist: 1
Real time detection of brake clearance value; 2
Real time detection of brake shoe wear; 3
Real time (direct or indirect) detection of spring pressure; 4
Real time detection of disc deflection; 5
Real time calculation of braking torque

1、 Overview
Ztj127 mine hoist brake clearance protection device (hereinafter referred to as the device) belongs to mine flameproof and intrinsically safe products
It is mainly used for on-line monitoring of brake shoe clearance and brake oil pressure of safety brake of hoist
The device has beautiful and solid structural design
Easy installation and flexible operation

The type of the device is mine flameproof and intrinsically safe & ldquo; Exd[ib]IMb”。 Gap protection device for brake of mine hoisting mechanism
1
Imported processor is adopted, with high system stability and stable operation
Compared with the traditional single chip microcomputer, the performance is more stable, the operation is faster and more accurate, and the phenomenon of crash in the traditional situation is avoided

2
The dynamic presentation screen is adopted, which is intuitive and visual
The real-time display of each brake shoe oil pressure is more intuitive and visual than the traditional digital display brake shoe clearance protection, and the real-time trend of brake shoe and oil pressure can be analyzed in real time

3
The color touch screen display has strong man-machine interaction and simple operation
Compared with the traditional keyboard and key type brake shoe clearance protection, the man-machine interface is easier to operate, which can realize the advantages that everyone can operate and operate flexibly

4
The imported data acquisition module is adopted, which has the advantages of detailed counting, stable transmission and stable operation, increased anti-interference ability and convenient installation
Compared with the traditional brake shoe clearance protection, it has the advantages of small data distortion, high transmission efficiency and stability

2、 Structure and working principle ztj127 hoist brake shoe clearance on-line monitoring and protection device
2
1 structure
The mine hoist gate clearance protection device is composed of ztj127-z mine flameproof and intrinsically safe hoist gate clearance protection device host, mine intrinsically safe oil pressure sensor and mine displacement sensor

2
2 basic principles
Power on, displacement sensor, oil pressure sensor output 4 & mdash; 20mA signal is transmitted to the host through the communication module for data processing and converted into corresponding data
The real-time data of the safety brake of the hoist will be displayed on the screen online
When the brake shoe clearance of the safety brake of the hoist is greater than 2mm, the brake oil pressure value is greater than the upper limit setting value and less than the lower limit setting value, the data is analyzed and determined to output the alarm signal device to send an audible alarm
Ztj127 hoist brake shoe clearance on-line monitoring and protection device
When the gate is opened, if the detected distance is 5
1mm, the gate clearance is 5
1mm minus 4
0mm = 1
1mm
However, after long-term operation, the brake shoe will have a certain amount of wear
If the wear value of the brake shoe is 1
2mm, at this time, when it is in the closing state, the distance detected by the sensor is 4mm minus 1
2mm = 2
8mm, while the distance detected by the sensor is 5
1mm plus 1
2mm = 6
3mm when it is opened, and the brake clearance is 6
3mm minus 4
0mm = 2
3mm
(it can be seen that spring fatigue and brake shoe wear will increase the brake clearance)
The above calculations are completed in the PLC controller
In actual use, it is only necessary to adjust the sensor to position 0 in the closing state

3、 Main functions and technical parameters
3
1 main functions
(1) Real time online detection and synchronous display of gate clearance value, with accuracy within plus or minus 0
1mm;
(2) Real time online detection and synchronous display of braking oil pressure value, with an accuracy of plus or minus 0
1MPa;
(3) Self adjustment and setting of gate clearance parameters and over limit alarm function;
(4) Brake oil pressure parameter self-adjusting setting, overrun alarm function;; Brake shoe clearance protection
(5) Automatic correction function of gate clearance calculation error;
(6) Fault self diagnosis function
(7) Historical data record and query function: the dispatcher can query the technical data of gate operation and maintenance at a certain time through this function, so as to understand the service status of the gate
Hoist brake clearance protection device
(8) The off-line switch is selected for easy check Check Repair

(9) Provide the output contact for the over limit alarm of the brake clearance value, which can be selected by the user to realize the locking secondary start-up
(10) Disc spring fatigue overrun alarm function
(11) Monitoring and alarm of idle time and drum deflection
(12) Gate sticking pressure monitoring alarm
Optional functions:
1
Improve the memory function of running dot signal display (0 to 9 o'clock)
2
Lifting direction wrong direction intelligent protection function
3
Improve the container running speed detection and display function (0 to 13
5 meters per second)
4
Detection and display function of lifting vessel position (well depth value) (0-3999
9m)
5
Constant speed section exceeding the set speed protection function (exceeding the max speed by 15%)
6
Deceleration section exceeding the set speed protection function (exceeding the set speed by 10%)
7
Depth indicator failure protection function
8
Over roll protection function
9
Fault memory function

Hoist brake shoe clearance protection device, hoist brake shoe clearance online monitoring device, hoist brake shoe wear detection