Mining flame-proof three-phase permanent magnet synchronous electric roller driving device

Abstract

The utility model discloses a mining explosion-proof type three-phase permanent magnet synchronous electric roller driving device which comprises a working table, a three-phase permanent magnet synchronous motor is installed at the upper end of the working table, a protection mechanism is installed on the working table, and an explosion-proof mechanism is installed on the working table. The protection mechanism comprises a protection shell, an air guide channel, a ventilation opening and an air extractor. The explosion-proof mechanism comprises a lifting plate, an air outlet hole, a limiting frame and a lifting piston. The utility model has the beneficial effects that the three-phase permanent magnet synchronous motor adopted by the device adopts an advanced magnetic field directional control technology, so that the loss in the energy conversion process is reduced, the speed is accurately regulated, the overall efficiency is improved, and when the inside of the protective shell explodes, the lifting piston can be pushed downwards through pressure, so that the explosion is prevented. And then under the action of the limiting frame, the lifting plate can move downwards and block the ventilation opening, then destructive power generated by explosion can be prevented from influencing the outside, and potential safety hazards are reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to electric roller equipment technical field more specifically, relate to a mine explosion -proof three -phase permanent magnet synchronous electric roller drive arrangement. BACKGROUND

[0002] Electric roller mainly applies to fixed and mobile belt conveyor, replaces traditional motor, speed reducer in the drive roller outside the separation type drive arrangement, the motor of electric roller can be placed in the inside of electric roller, also can be placed in the outside, the electric roller with the characteristic that the motor is placed in the outside has simple installation and maintenance.

[0003] In the mine operation environment, because the existence of gas and other combustible gas in the mine, the conventional electric roller may exist the danger of explosion. Therefore, the research and development and application of mine explosion -proof electric roller have important significance for improving the safety production level of mine, the existing mine electric roller motor is all through the installation protective housing outside the motor to isolate explosion, but the motor generates heat when using, and then needs to open hole ventilation, and the ventilation opening will exist security risks when explosion.

[0004] It should be noted that the above content belongs to the technical cognition of the inventor and does not necessarily constitute the prior art. CONTENT OF THE UTILITY MODEL

[0005] The utility model discloses a kind of mine explosion -proof three -phase permanent magnet synchronous electric roller drive arrangement to solve the above problems.

[0006] The technical scheme of the utility model for achieving the above-mentioned purpose is that a kind of mine explosion -proof three -phase permanent magnet synchronous electric roller drive arrangement, including workbench, the workbench upper end is installed with three-phase permanent magnet synchronous motor, the workbench is installed with protection mechanism, the workbench is installed with explosion -proof mechanism;

[0007] The protection mechanism includes protective housing installed on the upper surface of workbench, the rotating end of the three-phase permanent magnet synchronous motor extends to the outside of protective housing, the protective housing can cover the three-phase permanent magnet synchronous motor, the lower end of the protective housing is installed with air guide channel on both sides, a plurality of ventilation openings are formed in the inner side of the air guide channel, an air extractor is installed in the protective housing;

[0008] The explosion -proof mechanism includes lifting plate in the air guide channel, a plurality of gas outlets are formed in the lifting plate, a limiting frame is installed in the air guide channel, the limiting frame can limit the lifting plate, a lifting piston is placed in the lower end of the air guide channel, the lower end of the lifting plate is placed on the lifting piston, when the lifting plate is placed on the lifting piston, the gas outlet and the ventilation opening are one-to-one corresponding.

[0009] Further, the air extractor comprises a one-way valve installed on the protective shell, the air extractor is installed on the upper surface of the workbench, the inlet end of the air extractor is connected with the one-way valve, an L-shaped baffle is installed on the workbench, and the L-shaped baffle can protect the air extractor and the one-way valve.

[0010] Further, the limiting frame comprises a pushing plate installed on the upper end of the lifting plate, a fixed plate installed in the air guide channel is arranged above the pushing plate, the fixed plate and the lifting plate are connected through a plurality of extension springs, limiting holes are arranged on the two sides of the upper end of the lifting plate, and limiting rods installed in the air guide channel are arranged in the limiting holes.

[0011] Further, the lifting plate is provided with a plurality of limiting wheels installed in the air guide channel on the two sides, and the limiting wheels can make the lifting plate adhere to the air guide channel.

[0012] Further, the air guide channel is provided with a protective channel at the lower end, the cross-sectional area of the protective channel is larger than that of the air guide channel, and the lower end of the protective channel is placed on the ground.

[0013] The device adopts an advanced magnetic field orientation control technology, reduces the loss in the energy conversion process, accurately adjusts the speed, improves the overall efficiency, and has high efficiency characteristics, so that the motor can significantly reduce energy consumption during long-time operation, the device can be ventilated and cooled through the air extractor and the ventilation opening during use, the lifting piston can be pushed downward by pressure when an explosion occurs in the protective shell, then the lifting plate can be moved downward under the action of the limiting frame, the ventilation opening can be blocked, and then the destructive power generated by the explosion can be prevented from affecting the outside, and safety hazards are reduced.

[0014] The protective channel is installed at the lower end of the air guide channel, so that the airflow can enter the protective channel with a larger cross-sectional area during the explosion, the power of the explosion can be reduced, the power of the explosion can be guided to the ground, and the loss can be reduced. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a structural schematic view of the mine explosion-proof three-phase permanent magnet synchronous electric motor roller driving device;

[0016] Figure 2 is a sectional view schematic view of the mine explosion-proof three-phase permanent magnet synchronous electric motor roller driving device in a side view direction;

[0017] Figure 3 is Figure 2 is a local enlarged view of B in FIG.

[0018] Figure 4It is the connection relation schematic view of the lifting plate and the limiting frame of the utility model.

[0019] In the figure, 1, workbench;2, three-phase permanent magnet synchronous motor;3, protective shell;4, air guide channel;5, ventilation opening;6, air extractor;7, lifting plate;8, air outlet;9, limiting frame;10, lifting piston;11, check valve;12, air extractor;13, L-shaped baffle;14, push plate;15, fixed plate;16, extension spring;17, limiting hole;18, limiting rod;19, limiting wheel;20, protective channel. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical scheme and advantage of the utility model embodiment more clear, the technical scheme in the utility model embodiment will be clearly and completely explained below in combination with the drawings in the utility model embodiment, obviously, the described embodiment is a part of the embodiment of the utility model, rather than all the embodiment. Based on the embodiment in the utility model, all other embodiments obtained by the ordinary skill in the art without creative labor are within the protection scope of the utility model.

[0021] In the description of the utility model, it is understood that the orientation or position relation indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is the orientation or position relation shown based on the drawing, and is only for the convenience of describing the utility model and simplifying the description, and is not indicated or implied that the indicated device or element must have a particular orientation, a particular orientation structure and operation, therefore, it cannot be understood as the limitation of the utility model. In addition, in the description of the utility model, the meaning of "multiple" is two or more than two, unless otherwise specifically limited.

[0022] The utility model provides Figures 1-4The illustrated one is mine explosion-proof type three-phase permanent magnet synchronous electric roller drive device, including workbench 1, the upper end of workbench 1 is installed three-phase permanent magnet synchronous motor 2, workbench 1 is installed with protection mechanism, workbench 1 is installed with explosion-proof mechanism;The protection mechanism includes the protection shell 3 installed on the upper surface of workbench 1, the rotating end of three-phase permanent magnet synchronous motor 2 extends to the outside of protection shell 3, protection shell 3 can cover three-phase permanent magnet synchronous motor 2, the lower end of protection shell 3 is installed with air guide channel 4 on both sides, multiple air vents 5 are opened in the inner side of air guide channel 4, air extractor 6 is installed in protection shell 3;The explosion-proof mechanism includes the lifting plate 7 located in the air guide channel 4, multiple air outlet holes 8 are opened on the lifting plate 7, the limiting frame 9 is installed in the air guide channel 4, the limiting frame 9 can limit the lifting plate 7, the lifting piston 10 is placed in the lower end of the air guide channel 4, the lower end of the lifting plate 7 is placed on the lifting piston 10, when the lifting plate 7 is placed on the lifting piston 10, the air outlet hole 8 and the air vent 5 correspond one by one;

[0023] The explosion-proof process of this device is as follows: under normal circumstances, the rotating end of three-phase permanent magnet synchronous motor 2 is connected with electric roller, which can drive the electric roller to rotate, the lower end of lifting plate 7 is placed on lifting piston 10, which can make air outlet hole 8 and air vent 5 correspond, when three-phase permanent magnet motor 2 operates, the air outside is sucked into protection shell 3 through air extractor 6, and then discharged through air outlet hole 8 and air vent 5, when explosion occurs in the protection shell 3, the gas flow generated by explosion can enter the air guide channel 4, and push the lifting piston 10 downward, the lifting piston 10 no longer blocks the lifting plate 7, which can push the lifting plate 7 downward under the action of limiting frame 9, and then block the air vent 5 through the lifting plate 7, which can prevent the gas flow generated by explosion from impacting the outside of protection shell 3, and reduce the security risk.

[0024] Refer to the description of the attached Figure 1 , air extractor 6 includes one-way valve 11 installed on protection shell 3, air extractor 12 is installed on the upper surface of workbench 1, the inlet end of air extractor 12 is connected with one-way valve 11, L-shaped baffle 13 is installed on workbench 1, L-shaped baffle 13 can protect air extractor 12 and one-way valve 11, the air outside can be extracted through air extractor 12 and one-way valve 11, and the gas flow from one-way valve 11 can be prevented when explosion occurs in the protection shell 3.

[0025] Refer to the description of the attached Figure 2 , the description of the attached Figure 3 and the description of the attached Figure 4 , limiting frame 9 includes push plate 14 installed on the upper end of lifting plate 7, push plate 14 is provided with fixed plate 15 installed in air guide channel 4, fixed plate 15 and lifting plate 7 are connected through multiple extension springs 16, limiting hole 17 is provided on both sides of the upper end of lifting plate 7, limiting rod 18 is installed in air guide channel 4 in limiting hole 17.

[0026] The process that the limiting frame 9 limits the lifting plate 7 is as follows: when the lifting piston 10 moves downwards, the lifting plate 7 can be moved downwards under the action of the telescopic spring 16, the limiting hole 17 and the limiting rod 18 can guarantee the direction and height of the descending of the lifting plate 7, thereby the ventilation opening 5 can be conveniently shielded.

[0027] Referring to the drawings accompanying the specification Figure 2 , the drawings accompanying the specification Figure 3 and the drawings accompanying the specification Figure 4 , the lifting plate 7 is provided with a plurality of limiting wheels 19 installed in the air guide channel 4 on both sides, the limiting wheels 19 can make the lifting plate 7 adhere to the air guide channel 4, and the air flow can be prevented from leaking out from the gap between the lifting plate 7 and the air guide channel 4.

[0028] Referring to the drawings accompanying the specification Figure 2 Figure 3 Figure 4 Figure 2 , the air guide channel 4 is provided with a protection channel 20 at the lower end, the cross-sectional area of the protection channel 20 is greater than that of the air guide channel 4, the lower end of the protection channel 20 is placed on the ground, when the air flow of explosion enters into the protection channel 20 from the air guide channel 4, the impact force of the air flow can be effectively reduced due to the increase of the cross-sectional area, and under the action of the protection channel 20, the air flow can be made to impact on the ground, so as to reduce the loss.

[0029] Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it still can modify the technical scheme recorded in the foregoing embodiments, or make equivalent replacement to part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical scheme deviate from the spirit and scope of the technical scheme of the embodiments of the utility model.

Claims

1. A mine explosion-proof three-phase permanent magnet synchronous electric drum drive device, comprising a workbench (1), wherein a three-phase permanent magnet synchronous motor (2) is mounted on the upper end of the workbench (1), characterized in that, The workbench (1) is equipped with a protective mechanism and an explosion-proof mechanism. The protective mechanism includes a protective shell (3) installed on the upper surface of the workbench (1), the rotating end of the three-phase permanent magnet synchronous motor (2) extends to the outside of the protective shell (3), the protective shell (3) can cover the three-phase permanent magnet synchronous motor (2), air guide channels (4) are installed on both sides of the lower end of the protective shell (3), multiple ventilation openings (5) are opened inside the air guide channels (4), and an exhaust fan (6) is installed inside the protective shell (3). The explosion-proof mechanism includes a lifting plate (7) located in the air guide channel (4). The lifting plate (7) has multiple air outlets (8). A limit frame (9) is installed in the air guide channel (4). The limit frame (9) can limit the lifting plate (7). A lifting piston (10) is placed at the lower end of the air guide channel (4). The lower end of the lifting plate (7) is placed on the lifting piston (10). When the lifting plate (7) is placed on the lifting piston (10), the air outlets (8) and the ventilation openings (5) correspond one-to-one.

2. The explosion-proof three-phase permanent magnet synchronous electric drum drive device for mining as described in claim 1, characterized in that, The exhaust fan (6) includes a one-way valve (11) installed on the protective housing (3). An exhaust fan (12) is installed on the upper surface of the workbench (1). The inlet end of the exhaust fan (12) is connected to the one-way valve (11). An L-shaped baffle (13) is installed on the workbench (1). The L-shaped baffle (13) can protect the exhaust fan (12) and the one-way valve (11).

3. The explosion-proof three-phase permanent magnet synchronous electric drum drive device for mining as described in claim 1, characterized in that, The limiting frame (9) includes a push plate (14) installed on the upper end of the lifting plate (7). Above the push plate (14) is a fixed plate (15) installed in the air guide channel (4). The fixed plate (15) and the lifting plate (7) are connected by multiple telescopic springs (16). Limiting holes (17) are provided on both sides of the upper end of the lifting plate (7). Limiting rods (18) installed in the air guide channel (4) are provided in the limiting holes (17).

4. A mine explosion-proof three-phase permanent magnet synchronous electric drum drive device according to claim 3, characterized in that, The lifting plate (7) is provided with multiple limiting wheels (19) installed in the air guide channel (4) on both sides. The limiting wheels (19) can make the lifting plate (7) stick to the air guide channel (4).

5. A mine explosion-proof three-phase permanent magnet synchronous electric drum drive device according to claim 1, characterized in that, The lower end of the air guide channel (4) is equipped with a protective channel (20), the cross-sectional area of ​​the protective channel (20) is larger than the cross-sectional area of ​​the air guide channel (4), and the lower end of the protective channel (20) is placed on the ground.

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