CN103395678A

CN103395678A - Mine main shaft protection device capable of preventing heavy skip from downward falling

Info

Publication number: CN103395678A
Application number: CN2013101636861A
Authority: CN
Inventors: 高春生; 王德民; 王庆林; 胡成忠; 边云飞; 李艳辉; 李玖洋; 贾东修; 王业繁; 王则行; 耿步平; 赵峥; 侯巍; 陈光焰; 张迎军
Original assignee: Tiefa Coal Industry (group) Xiaonan Coal Mine LLC
Current assignee: Tiefa Coal Industry (group) Xiaonan Coal Mine LLC
Priority date: 2013-05-07
Filing date: 2013-05-07
Publication date: 2013-11-20
Anticipated expiration: 2033-05-07
Also published as: CN103395678B

Abstract

A mine main shaft protection device capable of preventing a heavy skip from downward falling comprises a shaft and the skip provided with a coaling opening and a unloading door and is characterized in that a protective box is fixed to the outer wall of the shaft, a fixed frame, a laser sensor and a control circuit board are arranged in the protective box, the laser sensor is arranged on the fixed frame, a laser transmission hole is formed in the wall of the shaft, a transmitting and receiving probe of the laser sensor is arranged in the laser transmission hole, and the coaling opening formed in the wall of the skip is used as the transmission route of a laser bundle. The mine main shaft protection device has the advantages of being suitable for any coal mine elevating electric control system which utilizes the skip, capable of accurately monitoring the true changing condition of the coal level in the skip, accurate in detection, high in safety and reliability, capable of normally working in places where much dust is produced when main shaft skip unloading is conducted, suitable for the complex electromagnetic environment on a coal mine spot, stable in motion, easy to inhaul and maintain, and capable of effectively preventing the heavy skip from downward falling, eradicating occurrence of heavy skip downward-falling accidents and guaranteeing safe elevating of a main shaft.

Description

The colliery main shaft prevents from heavily struggling against and transfers fender guard

Technical field

The present invention relates to the safety guard of a kind of colliery main shaft hoist control system, particularly a kind of main shaft prevents from heavily struggling against and transfers fender guard.

Background technology

In the coal production process, main shaft is because of its importance, particularity, in whole transportation elevator system, and the throat of being likened into human body of image.

Along with colliery big scale fixed equipments automation, control the continuous progress of science and technology, very high to hoist control system safety requirements reliability.But be subjected to site environment, and other unfavorable factor impact, often because there is unsafe possibility in certain link, and limited the application that automation is controlled.On the unloading link at main hoist, be subjected to the impact of the many factors such as ature of coal, production link, occur that sometimes coal sticks in skip bucket, and unloading is not got off, or unloading sub-fraction coal, and most of coal still sticks on the situation in skip bucket.Coal sticks on two kinds of situations above skip bucket as shown in Fig. 1 a, b.Both of these case is as found not in time, and it is all breakneck that heavily loaded skip bucket is transferred to down-hole again, probably causes winch i.e. so-called " driving " out of control in service, or heavily loaded skip bucket transfers to down-hole, and carries out twice loading.Its result is all very harmful.Adopt which type of Monitoring and Controlling mode, or measure prevents that the skip bucket that is loaded with coal from transferring to down-hole, namely preventing heavily struggles against transfers the proposition of fender guard.

Existing colliery main shaft is installed prevents from heavily struggling against and transfers fender guard (seeing Fig. 2,3); its principle of work is: at the outer photodiode probe 4 that arranges of dustpan unloading door 3; under normal circumstances; after skip bucket puts in place; the dustpan unloading door is opened by manual control; coal relies on self gravitation, from skip bucket, unloading out.The protection of unloading coal adopts the infrared ray of the photodiode probe emission of spontaneous emission, reception to detect coal; while from coal, drawing off, infrared probe reception signal is started working; after time delay, the contact action that is connected in winch signal block loop of inner output, allow winch to send starting signal.But from its principle, can find out, when appearance two kinds of coals did not as shown in Figure 1 unload clean situation, winch still likely moved.Consequently prevent from heavily struggling against and transfer fender guard (coal that slips protection) and do not have the effect that preventing heavily struggles against transfers, the generation that probably causes heavy bucket to transfer accident.

Summary of the invention

The purpose of this invention is to provide a kind of main shaft and prevent from heavily struggling against and transfer fender guard, can monitor accurately the real change situation of coal position in skip bucket, safety and reliability is high; Place normal operation that can dust is larger between the main shaft dustpan unloading, adapt to the electromagnetic environment of colliery scene complexity; Having stable behavior, repair and maintenance is simple; The generation that stopping heavily struggles against transfers accident, the security improvement of assurance main shaft.

Technical scheme provided by the invention is as follows: comprise pit shaft, with the skip bucket of coal port and unloading door, it is characterized in that: fixed protection case on the pit shaft outer wall arranges fixed mount, laser sensor and control circuit board in protective housing; Laser sensor is assembled on fixed mount, on well bore wall, offers the laser perforation, and the emission receiving transducer of laser sensor is positioned at laser perforation place, utilizes the conducting path of the coal port of skip bucket as laser beam.

Above-mentioned fixed mount upper end connects the Level tune seat by rotating shaft, on the Level tune seat, by adjusting bolt, connects vertical plane angular adjustment seat, on vertical plane angular adjustment seat, is fixedly connected with laser sensor.

the present invention adopts contactless laser sensor, its principle of work is: under normal condition, the skip bucket that coal is housed puts in place rear (referring to Fig. 4, Fig. 5), laser transmitter projects goes out laser, set when monitoring distance is 7 meters to send and allow the signal of driving, and when coal does not have completion of discharge, monitoring distance is less than 7 meters, laser sensor is not launched the signal that allows driving, only in the situation that coal-discharging is complete, monitoring distance reaches 7 meters, laser sensor sends starting signal, as can be seen from Figure 3, utilize laser sensor apart from monitoring function, monitor the variation of coal position in skip bucket.Play the purpose that preventing heavily struggles against transfers.The groundwork of laser ranging is: by the light velocity, be the laser directive measured target of C, measure the time that it returns, try to achieve thus between laser and measured target apart from d.

That is: in d=c t/2 formulas, t-laser sends and receives the time between return signal;

Distance between d-laser and measured target.

Good effect of the present invention: be suitable for the coal mine lifting Electrical Control system of any employing skip bucket, can monitor accurately the real change situation of coal position in skip bucket, detect accurately, safety and reliability is high; Place normal operation that can dust is larger between the main shaft dustpan unloading, adapt to the electromagnetic environment of colliery scene complexity; Having stable behavior, repair and maintenance is simple; Effectively prevent from heavily struggling against and transferring, the generation that stopping heavily struggles against transfers accident, the security improvement of assurance main shaft.

The accompanying drawing explanation

Fig. 1 a, b are that coal sticks on two kinds of situation schematic diagrams above skip bucket.

Fig. 2, Fig. 3 be existing prevent from heavily struggling against transfer fender guard (coal that slips protection) principle schematic.

Fig. 4, Fig. 5 are that laser range sensor of the present invention is monitored the state principle schematic of unloading coal.

Fig. 6, Fig. 7 are that laser sensor is applied to the electric control theory figure that main shaft prevents from heavily struggling against and transfers fender guard.

Fig. 8 is that laser sensor is assembled in the schematic diagram on fixed mount.

The specific embodiment

See Fig. 4-8, concrete structure is as follows: the skip bucket 1 with coal port 1-1 and unloading door 3 runs in the pit shaft 2 of main shaft, this device is installed on the colliery main shaft 4th floors, namely fixed protection case 2-1 on pit shaft 2 outer walls of main shaft, arrange fixed mount 9, laser sensor 5 and control circuit board in protective housing 2-1; On well bore wall, offer a laser perforation that 120mm is square, the emission receiving transducer of laser sensor 5 is positioned at laser perforation place, for the use of sensor laser beam to the supervision of skip bucket coal position.Fixed mount 9 upper ends connect Level tune seat 8 by rotating shaft, on Level tune seat 8, by adjusting bolt 7, connect vertical plane angular adjustment seat 6, on vertical plane angular adjustment seat 6, are fixedly connected with laser sensor 5; Left rotation and right rotation angle 180 degree, adjust angle 90 degree up and down.Can be suitable for the requirement of field adjustable and adjustment.Utilize the conducting path of the coal port 1-1 of skip bucket 1 as laser beam.

What laser sensor 5 adopted is that length is with apart from laser rangefinder PT6011(the blanking type of having powerful connections).Its correlation technique parameter is as follows: PT6011 DC PNP NO/4～20mA, 0 ~ 10V background blanking 19m

Detecting distance 0.2～10m can set

Light source red laser 650nm

Maximum current output 00mA precision 1...5mm switching frequency 100Hz

Connection mode connector M12 4 pins

Show the LED redness

Signal relay is exported without soruce contact

Material mould die case zinc

Degree of protection IP67

Working temperature range-10 ℃～+ 70 ℃.

Control circuit following (seeing Fig. 6,7):

The alternating current 220V power supply, provide power supply by connection terminal L and N circuit.Be provided with the circuit controling switch ZK2 of relay LJX, the master cock ZK1 of DC regulated power supply, the DC regulated power supply parameter is: input voltage 220V, received current 0.65A, output supply voltage 24V, outgoing current 2.1A.

JG master's apomecometer and JG subranging instrument direct supply are the 24V power supply, and after connection, the major-minor apomecometer is all in running order, and JG advocates peace, and JG is secondary is relay, and ZTJ and FTJ are the put relay of skip bucket to bit motion.Three output point LJ masters, LJ are secondary, LJX2 imports the winch interlock circuit into after in parallel, realize anti-defencive function of heavily transferring.

The electric control principle explanation:

Laser sensor of the present invention is selected the PT6011 type product, the alternating current 220V power supply, through air automatic switch ZK1, supply with direct current 24V constant voltage power suspply, the direct current 24V power supply of output, supply with JG master's apomecometer and the JG subranging instrument direct supply of laser sensor, when main skip bucket put in place, that the relay ZTJ that puts in place is made war was closed (main skip bucket put in place ZTJ adhesive battle, its control coil is in parallel with original control loop relay coil that puts in place), the ZTJ1 closure, the ZTJ close point disconnects LJ SecondaryRelay forms locking (namely not allowing the secondary relay closes of LJ).When skip bucket is opened unloading behind the door, coal in skip bucket unloads by deadweight, after coal-discharging is complete, laser sensor detects the coal position in skip bucket, and when reaching the setting value of setting up in advance before, the inner output point of laser sensor is JG master's apomecometer output point closure, JG main relay closure, its JG master's output point closure, the LJ main relay obtains electric, and LJ master's 1 self-insurance point is closed; LJ master 2 seals in the interlock circuit of hoist control system, sends the signal of permission, promotes and could normally start.As occur that coal is due to wet being bonded on skip bucket, and both coal had not unloaded, and laser sensor detected range signal and did not reach predetermined value this moment, can not send starting signal, and gig can not start operation.Secondary skip bucket puts in place, and to detect principle the same.In loop, the purpose of design LJ major loop is the reliability that the raising system detects.

ZK1 closure during normal operation, disconnect when maintenance, prevent the injury of laser to human body.If want to send starting signal this moment, can make winch can send corresponding maintenance signal by inspection button LJAN, complete upkeep operation.Another purpose of inspection button LJAN is that while on the skip bucket parking stall, being equipped with deviation, the signal that puts in place is normal, but laser sensor measured value out of reach setting value, and this moment, laser sensor was not exported.But completion of discharge of the coal in skip bucket; the unloader signal work can be pressed inspection button LJAN; winch can normally be started; when next time, another laser sensor was working properly, disconnect the self-locking that LJX forms, make to prevent heavily to struggle against to transfer and protect again in place in operation; another output point of LJX seals in winch PLC home loop; on the computer screen on driving position, form and show, point out the downward putting device that prevents from heavily struggling against abnormal, need to check and process.

Claims

1. a colliery main shaft prevents from heavily struggling against and transfers fender guard, comprises pit shaft, and with the skip bucket of coal port and unloading door, it is characterized in that: fixed protection case on the pit shaft outer wall arranges fixed mount, laser sensor and control circuit board in protective housing; Laser sensor is assembled on fixed mount, on well bore wall, offers the laser perforation, and the emission receiving transducer of laser sensor is positioned at laser perforation place, and the coal port of skip bucket is as the conducting path of laser beam.

2. colliery according to claim 1 main shaft prevents from heavily struggling against and transfers fender guard; it is characterized in that: the fixed mount upper end connects the Level tune seat by rotating shaft; on the Level tune seat, by adjusting bolt, connect vertical plane angular adjustment seat, on vertical plane angular adjustment seat, be fixedly connected with laser sensor.