Main shaft bottom coal piling protection monitoring system

Abstract

The utility model relates to a main shaft bottom coal piling protection monitoring system. In order to fill the blank in the prior art, the main shaft bottom coal piling protection monitoring system comprises a main shaft bottom and a ventilation roadway, the main shaft bottom is in a conical hopper shape, the ventilation roadway is communicated with the main shaft bottom, a coal piling protection monitoring device is installed in the ventilation roadway, the coal piling protection monitoring device comprises an installation frame and a fixing shaft, and the fixing shaft is fixed to the installation frame. A rotating sleeve is sleeved on the fixed shaft, a bearing is arranged between the rotating sleeve and the fixed shaft, a plurality of connecting rods are arranged on the outer circumference of the rotating sleeve, the outer end of each connecting rod is respectively provided with an arc-shaped fan blade or a hemispherical shell-shaped wind cap to form a windmill, and a magnetic type limit switch is further fixed on the fixed shaft. The magnetic type limit switch is connected with a signal input end of a mining PLC (Programmable Logic Controller), and at least one connecting rod is made of a ferromagnetic material or is provided with a ferromagnetic induction piece. The device is simple in structure and suitable for protection and monitoring of coal piling at the main shaft bottom of the coal mine.

Description

TECHNICAL FIELD

[0001] The utility model relates to a main shaft bottom coal pile protection monitoring system. BACKGROUND

[0002] The main shaft bottom environment is poor, humid, and has much water and coal powder particles, and the traditional mechanical rod type and electrode type monitoring switches are not suitable for the site.

[0003] The traditional mechanical rod type monitoring switch, such as the belt machine head coal blockage prevention alarm device disclosed in Chinese utility model patent CN203833174U, is easy to rust or be filled with water under the action of water, and is not sensitive or misoperates;

[0004] Moreover, when the main shaft skip hoist coal, a small amount of coal powder particles inevitably fall off, which easily blocks the connecting rod and makes it not sensitive; the coal blocks falling off or falling on the connecting rod will cause misoperation, and the reliability and sensitivity are difficult to guarantee. Therefore, the traditional mechanical rod type monitoring switch has many faults and misoperations when applied to coal mine main shaft bottom coal pile protection monitoring. SUMMARY

[0005] The utility model solves the technical problem of overcoming the above defects of the prior art, and provides a main shaft bottom coal pile protection monitoring system which is simple in structure, has few faults, and will not cause misoperation even if a small amount of coal falls.

[0006] In order to solve the above technical problems, the main shaft bottom coal pile protection monitoring system comprises a main shaft bottom and a ventilation lane, the main shaft bottom is in the shape of a conical bucket, the ventilation lane is communicated with the main shaft bottom, and characterized in that: a coal pile protection monitoring device is installed in the ventilation lane, the coal pile protection monitoring device comprises a mounting frame and a fixed shaft, the fixed shaft is fixed on the mounting frame, a rotating sleeve is sleeved on the fixed shaft, a bearing is arranged between the rotating sleeve and the fixed shaft, a plurality of connecting rods are arranged on the outer circumference of the rotating sleeve, the outer end of each connecting rod is respectively provided with an arc-shaped fan blade or a hemispherical shell-shaped wind cap, the arc-shaped fan blade or the hemispherical shell-shaped wind cap and the connecting rod therebetween form a windmill, a connecting piece is further fixed on the fixed shaft, a magnetic attraction type limit switch is fixed on the connecting piece, the magnetic attraction type limit switch is connected with a signal input end matched with a mine-used PLC, at least one connecting rod is made of ferromagnetic material or at least one connecting rod is provided with a ferromagnetic sensing piece, and when the windmill rotates, the connecting rod made of ferromagnetic material or the ferromagnetic sensing piece continuously passes through the magnetic attraction type limit switch and triggers the magnetic attraction type limit switch to generate a pulse signal.

[0007] Before use, the mounting frame of the coal pile protection monitoring device is fixed in the ventilation lane of the main shaft bottom by expansion bolts, and the coal pile protection monitoring device is kept at a distance of 5-8 m from the ventilation lane opening.

[0008] When the main shaft is in normal use, the main shaft bottom ventilation blows the windmill to rotate at a uniform speed, and the mine-used PLC generates a pulse signal frequency which is stable and unchangeable when sensing the magnetic attraction type limit switch.

[0009] When the mine-used PLC generates a pulse signal frequency which obviously decreases or disappears when sensing the magnetic attraction type limit switch, it indicates that the coal accumulated at the main shaft bottom has affected the ventilation at the main shaft bottom, the wind speed becomes smaller, and the rotating speed of the windmill becomes slower or stops.

[0010] As an optimization, the mounting frame comprises a base plate and a mounting plate which are connected to form an L shape, the top end of the fixing shaft is fixedly connected to the lower plate of a U-shaped clamping plate, a threaded hole is formed in the upper plate of the U-shaped clamping plate, a fastening screw is arranged in the threaded hole, the outer end of the mounting plate is inserted between the upper plate and the lower plate of the U-shaped clamping plate, and the inner end of the fastening screw abuts against the mounting plate to tightly press the mounting plate against the lower plate of the U-shaped clamping plate, so as to fix the U-shaped clamping plate and the fixing shaft connected thereto.

[0011] The main shaft bottom coal accumulation protection monitoring system has simple structure, will not generate faults or malfunctions, and is suitable for use in coal mine main shaft bottom coal accumulation protection monitoring. BRIEF DESCRIPTION OF DRAWINGS

[0012] The main shaft bottom coal accumulation protection monitoring system will be further described below with reference to the drawings:

[0013] Figure 1 is a schematic view of the three-dimensional structure of the coal accumulation protection monitoring device in the utility model.

[0014] Figure 2 is a schematic view of the three-dimensional structure of the main shaft bottom coal accumulation protection monitoring system.

[0015] In the drawings: 1 is a main shaft bottom, 2 is a ventilation roadway, 3 is a coal accumulation protection monitoring device, 4 is a mounting frame, 41 is a base plate, 42 is a mounting plate, 5 is a fixing shaft, 6 is a rotating sleeve, 7 is a bearing, 8 is a connecting rod, 9 is an arc-shaped wind blade, 10 is a connecting piece, 11 is a magnetic attraction type limit switch, 12 is a ferromagnetic sensing piece, 13 is a U-shaped clamping plate, 131 is the lower plate of the U-shaped clamping plate 13, 132 is the upper plate of the U-shaped clamping plate 13, 14 is a fastening screw, 15 is a main shaft, and 16 is a scraper conveyor. DETAILED DESCRIPTION

[0016] Embodiment one: as Figure 1As shown, the coal piling protection monitoring system at the main shaft bottom comprises a main shaft bottom 1 and a ventilation lane 2, the main shaft bottom 1 is in the shape of a conical hopper, the ventilation lane 2 is communicated with the main shaft bottom 1, characterized in that: a coal piling protection monitoring device 3 is installed in the ventilation lane 2, the coal piling protection monitoring device 3 comprises a mounting frame 4 and a fixed shaft 5, the fixed shaft 5 is fixed on the mounting frame 4, a rotating sleeve 6 is sleeved on the fixed shaft 5, a bearing 7 is arranged between the rotating sleeve 6 and the fixed shaft 5, a plurality of connecting rods 8 are arranged on the outer circumference of the rotating sleeve 6, an arc-shaped fan blade 9 (or a hemispherical shell-shaped fan cap, omitted) is arranged at the outer end of each connecting rod 8, the arc-shaped fan blade 9 and the connecting rod 8 between the arc-shaped fan blade 9 and the rotating sleeve 6 form a windmill, a connecting piece 10 is further fixed on the fixed shaft 5, a magnetic attraction type limit switch 11 is fixed on the connecting piece 10, the magnetic attraction type limit switch 11 is connected with a signal input end of a mine-used PLC (not shown in the figure), at least one connecting rod 8 is made of ferromagnetic material or at least one connecting rod 8 is provided with a ferromagnetic sensing element 12, when the windmill rotates, the connecting rod 8 made of ferromagnetic material or the ferromagnetic sensing element 12 continuously passes through the magnetic attraction type limit switch 8 and triggers the magnetic attraction type limit switch 11 to generate a pulse signal.

[0017] The mounting frame 4 comprises a base plate 41 and a mounting plate 42, the two are connected to form an L shape, the top end of the fixed shaft 5 is fixedly connected to the lower plate 131 of a U-shaped clamping plate 13, a threaded hole is formed in the upper plate 132 of the U-shaped clamping plate 13, a fastening screw 14 is arranged in the threaded hole, the outer end of the mounting plate 42 is inserted between the upper plate 132 and the lower plate 131 of the U-shaped clamping plate 13, the inner end of the fastening screw 14 abuts against the mounting plate 42, the mounting plate 42 is tightly pressed against the lower plate 131 of the U-shaped clamping plate 13, thereby fixing the U-shaped clamping plate 13 and the fixed shaft 5 connected thereto.

Claims

1. A main shaft bottom coal pile protection monitoring system, comprising a main shaft bottom and a ventilation roadway, the main shaft bottom is in the shape of a cone, and the ventilation roadway is communicated with the main shaft bottom, characterized in that: The coal pile protection monitoring device is installed in the ventilation lane, and comprises a mounting frame and a fixed shaft, the fixed shaft is fixed on the mounting frame, a rotating sleeve is sleeved on the fixed shaft, a bearing is arranged between the rotating sleeve and the fixed shaft, a plurality of connecting rods are arranged on the outer circumference of the rotating sleeve, an arc-shaped fan blade or a hemispherical shell-shaped fan hood is arranged at the outer end of each connecting rod, the arc-shaped fan blade or the hemispherical shell-shaped fan hood and the connecting rod therebetween and the rotating sleeve form a windmill, a connecting piece is further fixed on the fixed shaft, a magnetic attraction type limit switch is fixed on the connecting piece, the magnetic attraction type limit switch is connected with a signal input end of a mine-used PLC, at least one connecting rod is made of ferromagnetic material or at least one connecting rod is provided with a ferromagnetic sensing element, when the windmill rotates, the connecting rod made of ferromagnetic material or the ferromagnetic sensing element continuously passes through the magnetic attraction type limit switch and triggers the magnetic attraction type limit switch to generate a pulse signal.

2. The primary coal bunker protection monitoring system according to claim 1, characterized in that: The mounting frame comprises a base plate and a mounting plate, and the two are connected to form an L shape, the top end of the fixed shaft is fixedly connected to the lower plate of a U-shaped clamping plate, a threaded hole is formed in the upper plate of the U-shaped clamping plate, a fastening screw is arranged in the threaded hole, the outer end of the mounting plate is inserted between the upper plate and the lower plate of the U-shaped clamping plate, the inner end of the fastening screw abuts against the mounting plate, and the mounting plate is tightly pressed on the lower plate of the U-shaped clamping plate, so as to fix the U-shaped clamping plate and the fixed shaft connected thereto.

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