CN219513657U - Explosion-proof and intrinsically safe variable frequency combined switch for mine - Google Patents

Abstract

The utility model relates to the technical field of variable frequency combined switches, in particular to a mining flameproof and intrinsically safe variable frequency combined switch, which solves the technical problems in the background art and comprises a flameproof shell, wherein the flameproof shell is internally divided into a left area, a middle area and a right area; the left area is provided with a first cavity and a second cavity, frequency converters are arranged in the first cavity and the second cavity, and the front surfaces of the first cavity and the second cavity are connected with explosion-proof door plates; the back surfaces of the first cavity and the second cavity are connected with a radiator module; the middle area is provided with four third cavities for installing the circuit breaker; the right area is provided with a fourth cavity, and two groups of illumination signal comprehensive protection devices and two groups of reversible vacuum electromagnetic starters are installed in the fourth cavity through a module support frame. The utility model solves the problems of high maintenance cost, high maintenance difficulty and the like of a coal mine working face due to the redundancy of cables and the various electrical equipment; the cable complexity is reduced, the maintenance cost is reduced, rich man-machine interfaces and control modes are provided, and the whole device is convenient to move.

Description

Explosion-proof and intrinsically safe variable frequency combined switch for mine

Technical Field

The utility model relates to the technical field of variable frequency combined switches, in particular to a mining explosion-proof and intrinsically safe variable frequency combined switch.

Background

Development of coal mining technology is accompanied by fusion and progress of electric power systems and electric control. In recent years, the underground coal mine power supply and distribution system in China rapidly develops, and power supply and distribution equipment is not limited to independent switch control any more and develops towards the direction of integration and modularization; meanwhile, in order to realize the high-quality development of the coal industry, the intelligentization also becomes the development direction of the coal mine electrical equipment.

Through the research of the market in the prior art, the underground power supply and distribution system of most coal mines still relies on a separated starter, one electric device is provided with one starter, the problems of confusion and redundancy of cable connection are also highlighted along with the enlargement of the mining scale of the coal mines, fault points are not easy to judge when faults occur, replacement and maintenance are inconvenient, and finally equipment management and maintenance difficulty index rise. Similarly, feed switches and lighting switches have similar problems.

Disclosure of Invention

The utility model provides a mining explosion-proof and intrinsically safe variable frequency combined switch, which aims to overcome the technical defects that in the existing power distribution system, each electrical device is provided with a starter to increase the number of switches, the cable connection is disordered and mixed, and fault points are difficult to judge.

The utility model provides a mining flameproof and intrinsically safe variable frequency combined switch, which comprises a flameproof shell, wherein the flameproof shell is divided into a left area, a middle area and a right area; the back surfaces of the left area, the middle area and the right area are all connected with explosion-proof access doors; the left area is provided with a first cavity and a second cavity, frequency converters with the same structure are arranged in the first cavity and the second cavity, and the front surfaces of the first cavity and the second cavity are respectively connected with an explosion-proof door plate; the back surfaces of the explosion-proof access doors corresponding to the first cavity and the second cavity are connected with a radiator module; the middle area is provided with four third cavities for installing the circuit breaker respectively, the circuit breaker is installed in the third cavities through an electric chassis truck to form a low-voltage permanent magnet mechanism vacuum feed switch, the front surface of the third cavities is connected with an explosion-proof up-down shutter, and the two groups of low-voltage permanent magnet mechanism vacuum feed switches supply power for the two frequency converters through wires inside the shell; the right area is provided with a fourth cavity, two groups of illumination signal comprehensive protection devices and two groups of reversible vacuum electromagnetic starters are arranged in the fourth cavity through a module support frame, and the front surface of the fourth cavity is connected with an explosion-proof door plate; the top of the flameproof shell is provided with two mutually separated and independent frequency conversion output wiring cavities, a frequency conversion intrinsic safety output wiring cavity, two feed output wiring cavities, two reversible magnetic output wiring cavities, two illumination output wiring cavities and a total input wiring cavity. In the combination switch, the scheme that each equipment loop is independently placed is adopted, in the first cavity and the second cavity, the radiator module is used for radiating for the corresponding frequency converter, so that normal working temperature is kept in the first cavity and the second cavity, and the first cavity and the second cavity are consistent in structure. The circuit breaker is installed on electric chassis car, can pass in and out along with electric chassis car, and electric chassis car business turn over receives PLC control, but remote operation also can equipment button operation. The illumination signal comprehensive protection device and the reversible vacuum electromagnetic starter are manufactured into independent modules, and are designed in a redundancy way. All the low-voltage permanent magnet mechanism vacuum feed switches, the illumination signal comprehensive protection device and the reversible vacuum electromagnetic starter have an address self-adaptation function, and after the modules are connected, the modules are automatically identified and connected with a communication network for data transmission. The two frequency conversion output wiring cavities are respectively connected with the frequency converters in the first cavity and the second cavity through explosion-proof wiring terminals at the bottoms of the two frequency conversion output wiring cavities; the frequency conversion intrinsic safety output wiring cavity is connected with the frequency converters in the first cavity and the second cavity through the explosion-proof wiring terminal at the bottom of the frequency conversion intrinsic safety output wiring cavity; the two feed output wiring cavities are respectively connected with the vacuum feed switches of the two groups of low-voltage permanent magnet mechanisms which are not used for supplying power to the frequency converter through explosion-proof wiring terminals at the bottoms of the two feed output wiring cavities; the two reversible magnetic output wiring cavities are respectively connected with two groups of reversible vacuum electromagnetic starters in the fourth cavity through explosion-proof wiring terminals at the bottom of the two reversible magnetic output wiring cavities; the two illumination output wiring cavities are respectively connected with the two groups of illumination signal comprehensive protection devices through explosion-proof wiring terminals at the bottoms of the two illumination output wiring cavities; the total input junction cavity is connected to an external cable.

Preferably, the frequency converter comprises an IGBT module, a driving plate, two contactors, two capacitor modules, a three-phase reactor, a display screen and buttons, wherein the driving plate and the IGBT module are both positioned on a back plate of a cavity where the driving plate and the IGBT module are positioned, the radiator module and the IGBT module are arranged back to back, the display screen and the buttons are embedded on an explosion-proof door plate corresponding to the cavity, and the two contactors, the two capacitor modules and the three-phase reactor are all positioned in the cavity where the driving plate and the IGBT module are positioned. The IGBT module and the driving plate are fixed on the back plate, redundant heat can be taken away through the radiator module, normal operation of the IGBT module and the driving plate is guaranteed, the display screen and the buttons are embedded into the explosion-proof door plate, and convenience is brought to setting parameters and the like for workers to regulate and control.

Preferably, a sliding rail base matched with the electric chassis is arranged in the third cavity, the circuit breaker is fixed on the electric chassis, a circuit connection copper rod serving as a moving contact is arranged at the rear end of the circuit breaker, an explosion-proof riser is arranged in the third cavity at the rear side of the circuit breaker, a fixed contact matched with the circuit connection copper rod is fixedly connected to the explosion-proof riser, a copper bar connected with the fixed contact is arranged on the back surface of the explosion-proof riser, the fixed contact in the third cavity in the same vertical direction shares the same copper bar, and the copper bar is connected with a main loop. The model of the electric chassis is DDDPC-4/4A-320, the circuit breaker can move horizontally along the sliding rail under the drive of the electric chassis, when the circuit breaker on the electric chassis moves horizontally to a closing position, a linkage mechanism of the electric chassis is triggered to stop the movement and lock the position, a circuit on the circuit breaker is connected with a copper rod in inserted connection with a static contact on a flame-out riser in a third cavity, and the copper rod is connected with a main loop, so that the feeding main loop is connected; when the circuit breaker on the electric chassis is translated to the opening position, the interlocking mechanism of the electric chassis is triggered to stop the movement and lock the position, and the circuit connection copper rod on the circuit breaker is separated from the fixed contact, so that the feed main loop is disconnected. The electric chassis is connected with the slide rail base through the buckle, and when hardware is damaged, only the standby trolley needs to be replaced, so that the electric chassis is quick and simple, and the follow-up production is hardly affected.

Preferably, the first cavity and the second cavity are two independent areas formed by separating the left area by the explosion-proof partition board, the four third cavities are four isolated areas formed by separating the middle area by the explosion-proof partition board, and the four third cavities are distributed in a shape of Chinese character 'tian'.

Compared with the prior art, the technical scheme provided by the utility model has the following advantages: the problems of high maintenance cost, high maintenance difficulty, few equipment control modes, difficult fault diagnosis, complex parameter setting and the like of a coal mine working face due to cable redundancy and a plurality of electrical equipment are solved; the utility model combines two frequency converters, four low-voltage permanent magnet vacuum feed switches, two reversible vacuum electromagnetic starters and two illumination signal comprehensive protection devices together, reduces the complexity of cables, lowers the maintenance cost, provides rich man-machine interfaces and control modes, and is convenient for moving the whole device.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the utility model and together with the description, serve to explain the principles of the utility model.

In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, and it will be obvious to a person skilled in the art that other drawings can be obtained from these drawings without inventive effort.

FIG. 1 is a schematic diagram of the overall structure of a mining explosion-proof and intrinsically safe variable frequency combined switch;

fig. 2 is a schematic diagram of the whole structure of the left, middle and right hidden door panels of the mining explosion-proof and intrinsically safe variable frequency combined switch;

FIG. 3 is a schematic diagram of the layout of the first or second chambers according to the present utility model;

fig. 4 is a schematic view of a mounting structure of the circuit breaker according to the present utility model;

FIG. 5 is a schematic view of the installation of the illumination signal integrated protection device and reversible vacuum electromagnetic starter of the present utility model;

fig. 6 is a schematic structural diagram of an output wiring cavity of the mining flameproof and intrinsically safe variable frequency combined switch.

In the figure: 1. an explosion-proof housing; 2. a left region; 3. a middle region; 4. a right region; 5. a frequency converter; 6. an explosion-proof door plate; 7. a heat sink module; 8. a circuit breaker; 9. an electric chassis vehicle; 10. explosion-proof up-down shutter; 11. an illumination signal comprehensive protection device; 12. a reversible vacuum electromagnetic starter; 13. an IGBT module; 14. a driving plate; 15. a contactor; 16. a capacitance module; 17. a three-phase reactor; 18. a display screen and buttons; 19. a variable frequency output wiring cavity; 20. variable frequency intrinsic safety output wiring cavity; 21. a feed output wiring cavity; 22. reversible magnetic output wiring cavity; 23. an illumination output wiring cavity; 24. the total input is connected to the wiring cavity.

Detailed Description

In order that the above objects, features and advantages of the utility model will be more clearly understood, a further description of the utility model will be made. It should be noted that, without conflict, the embodiments of the present utility model and features in the embodiments may be combined with each other.

In the description, it should be noted that the terms "first," "second," and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. It should be noted that, unless explicitly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms described above will be understood by those of ordinary skill in the art as the case may be.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model, but the present utility model may be practiced otherwise than as described herein; it will be apparent that the embodiments in the specification are only some, but not all, embodiments of the utility model.

Specific embodiments of the present utility model or the utility model will be described in detail with reference to fig. 1 to 6.

The mining flameproof and intrinsically safe variable frequency combined switch comprises a flameproof shell 1, wherein the flameproof shell 1 is internally divided into a left zone 2, a middle zone 3 and a right zone 4; the back surfaces of the left area 2, the middle area 3 and the right area 4 are all connected with explosion-proof access doors; a first cavity and a second cavity are arranged in the left area 2, frequency converters 5 with the same structure are arranged in the first cavity and the second cavity, and the front surfaces of the first cavity and the second cavity are respectively connected with an explosion-proof door plate 6 through bolts; the back surfaces of the explosion-proof access doors corresponding to the first cavity and the second cavity are connected with a radiator module 7; the middle area 3 is provided with four third cavities for installing the circuit breaker 8 respectively, the circuit breaker 8 is installed in the third cavities through an electric chassis 9 to form a low-voltage permanent magnet mechanism vacuum feed switch, the front surface of the third cavities is connected with an explosion-proof up-down shutter 10, and two groups of low-voltage permanent magnet mechanism vacuum feed switches supply power to the two frequency converters 5 through wires inside a shell; the right area 4 is provided with a fourth cavity, two groups of illumination signal comprehensive protection devices 11 and two groups of reversible vacuum electromagnetic starters 12 are arranged in the fourth cavity through a module support frame, and the front surface of the fourth cavity is connected with an explosion-proof door plate 6 through bolts; the top of the flameproof shell 1 is provided with two mutually separated and independent frequency conversion output wiring cavities, a frequency conversion intrinsic safety output wiring cavity, two feed output wiring cavities, two reversible magnetic lifting output wiring cavities, two illumination output wiring cavities and a total input wiring cavity.

The combined switch is of a rectangular structure, so that the vehicle-mounted transportation is facilitated, the roadway occupied space in mines is reduced, the back surfaces of the left area 2, the middle area 3 and the right area 4 are connected with explosion-proof access doors, the explosion-proof access doors are designed to be narrow and high, and under the premise that the line access space is sufficient, the occupied space occupied by opening the door body is reduced as much as possible, so that the combined switch is suitable for underground narrow and complex working environments. The combined switch adopts a scheme that each equipment loop is independently placed, and the radiator module 7 is used for radiating heat for the corresponding frequency converter 5 in the first cavity and the second cavity, so that the normal working temperature is kept in the first cavity and the second cavity, and the structures of the first cavity and the second cavity are consistent. The breaker 8 is arranged on the electric chassis 9, can enter and exit along with the electric chassis 9, and the electric chassis 9 enters and exits under the control of the PLC controller, and can be operated remotely or operated by a button of equipment. The illumination signal comprehensive protection device 11 and the reversible vacuum electromagnetic starter 12 are manufactured into independent modules, and are designed in a redundancy way. All the vacuum feed switches of the low-voltage permanent magnet mechanism, the illumination signal comprehensive protection device 11 and the reversible vacuum electromagnetic starter 12 have an address self-adaptation function, and after the modules are connected, the modules are automatically identified and connected with a communication network for data transmission. Each output wiring cavity at the top of the flameproof shell 1 adopts a top bulge side-by-side structural layout design. The two frequency conversion output wiring cavities are respectively connected with the frequency converters in the first cavity and the second cavity through explosion-proof wiring terminals at the bottoms of the two frequency conversion output wiring cavities; the frequency conversion intrinsic safety output wiring cavity is connected with the frequency converters in the first cavity and the second cavity through the explosion-proof wiring terminal at the bottom of the frequency conversion intrinsic safety output wiring cavity, namely the two frequency converters share one frequency conversion intrinsic safety output wiring cavity; the two feed output wiring cavities are respectively connected with the vacuum feed switches of the two groups of low-voltage permanent magnet mechanisms which are not used for supplying power to the frequency converter through explosion-proof wiring terminals at the bottoms of the two feed output wiring cavities; the two reversible magnetic output wiring cavities are respectively connected with two groups of reversible vacuum electromagnetic starters in the fourth cavity through explosion-proof wiring terminals at the bottom of the two reversible magnetic output wiring cavities; the two illumination output wiring cavities are respectively connected with the two groups of illumination signal comprehensive protection devices through explosion-proof wiring terminals at the bottoms of the two illumination output wiring cavities; the total input junction cavity is connected to an external cable.

Further, as a specific embodiment of the present utility model, the frequency converter 5 includes an IGBT module 13, a driving board 14, two contactors 15, two capacitor modules 16, a three-phase reactor 17, and a display screen and a button 18, where the driving board 14 and the IGBT module 13 are located on a back plate of a cavity where the driving board and the IGBT module 13 are located, the radiator module 7 and the IGBT module 13 are disposed back to back, the display screen and the button 18 are embedded on the explosion-proof door panel 6 corresponding to the cavity, and the two contactors 15, the two capacitor modules 16, and the three-phase reactor 17 are located in the cavity where the driving board and the IGBT module 13 are located. The IGBT module 13 and the driving plate 14 are fixed on the back plate, redundant heat can be taken away through the radiator module 7, normal operation of the IGBT module 13 and the driving plate 14 is guaranteed, the display screen and the buttons 18 are embedded in the explosion-proof door plate 6, and convenience is brought to setting parameters and the like for workers to regulate and control.

Further, as a specific embodiment of the utility model, a sliding rail base matched with the electric chassis 9 is arranged in the third cavity, the circuit breaker 8 is fixed on the electric chassis 9, a circuit connection copper rod serving as a moving contact is arranged at the rear end of the circuit breaker 8, an explosion-proof vertical plate is arranged in the third cavity at the rear side of the circuit breaker 8, a fixed contact matched with the circuit connection copper rod is fixedly connected to the explosion-proof vertical plate, a copper bar connected with the fixed contact is arranged on the back surface of the explosion-proof vertical plate, the fixed contact in the third cavity in the vertical direction shares the same copper bar, and the copper bar is connected with the main circuit. The model of the electric chassis 9 is DDDPC-4/4A-320, the circuit breaker 8 can move horizontally along the sliding rail under the drive of the electric chassis 9, when the circuit breaker 8 on the electric chassis 9 moves horizontally to a closing position, a linkage mechanism of the electric chassis 9 is triggered to stop the movement and lock the position, a circuit connecting copper rod on the circuit breaker 8 is inserted and connected with a static contact on an explosion-proof riser, and the copper bar is connected with a main circuit, so that the connection of a feed main circuit is realized; when the circuit breaker 8 on the electric chassis 9 translates to the opening position, the interlocking mechanism of the electric chassis 9 is triggered to stop the movement and lock the position, and the circuit connection copper rod on the circuit breaker 8 is separated from the fixed contact, so that the disconnection of the feeding main loop is realized. The electric chassis 9 is connected with the slide rail base through the buckle, and when hardware is damaged, only the standby trolley needs to be replaced, so that the electric chassis is quick and simple, and the follow-up production is hardly affected.

Further, the first cavity and the second cavity are two independent areas formed by separating the left area 2 through the explosion-proof partition board, the four third cavities are four isolated areas formed by separating the middle area 3 through the explosion-proof partition board, and the four third cavities are distributed in a 'field' shape. The arrangement structure is reasonable.

The foregoing is only a specific embodiment of the utility model to enable those skilled in the art to understand or practice the utility model. Although described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the embodiments, and they should be construed as covering the scope of the appended claims.

Claims (4)

1. The mining flameproof and intrinsically safe variable frequency combined switch is characterized by comprising a flameproof shell (1), wherein the flameproof shell (1) is internally divided into a left zone (2), a middle zone (3) and a right zone (4); the back surfaces of the left area (2), the middle area (3) and the right area (4) are connected with explosion-proof access doors; a first cavity and a second cavity are arranged in the left area (2), frequency converters (5) with the same structure are arranged in the first cavity and the second cavity, and the front surfaces of the first cavity and the second cavity are respectively connected with an explosion-proof door plate (6); the back surfaces of the explosion-proof access doors corresponding to the first cavity and the second cavity are connected with a radiator module (7); the middle area (3) is provided with four third cavities used for installing a circuit breaker (8), the circuit breaker (8) is installed in the third cavities through an electric chassis (9) to form a low-voltage permanent magnet mechanism vacuum feed switch, the front surface of the third cavity is connected with an explosion-proof up-down shutter (10), and the two groups of low-voltage permanent magnet mechanism vacuum feed switches supply power to the two frequency converters (5) through wires inside a shell; the right area (4) is provided with a fourth cavity, two groups of illumination signal comprehensive protection devices (11) and two groups of reversible vacuum electromagnetic starters (12) are arranged in the fourth cavity through a module support frame, and the front surface of the fourth cavity is connected with an explosion-proof door plate (6); the top of the flameproof shell (1) is provided with two mutually separated and independent frequency conversion output wiring cavities (19), a frequency conversion intrinsic safety output wiring cavity (20), two feed output wiring cavities (21), two reversible magnetic output wiring cavities (22), two illumination output wiring cavities (23) and a total input wiring cavity (24) in parallel.

2. The mining explosion-proof and intrinsically safe variable frequency combined switch according to claim 1, wherein the frequency converter (5) comprises an IGBT module (13), a driving plate (14), two contactors (15), two capacitor modules (16), a three-phase reactor (17) and a display screen and a button (18), the driving plate (14) and the IGBT module (13) are both positioned on a back plate of a cavity, the radiator module (7) and the IGBT module (13) are arranged back to back, the display screen and the button (18) are embedded on an explosion-proof door plate (6) corresponding to the cavity, and the two contactors (15), the two capacitor modules (16) and the three-phase reactor (17) are both positioned in the cavity.

3. The mining explosion-proof and intrinsically safe variable frequency combined switch according to claim 2, wherein a sliding rail base matched with an electric chassis (9) is arranged in a third cavity, a circuit breaker (8) is fixed on the electric chassis (9), a circuit connection copper rod serving as a moving contact is arranged at the rear end of the circuit breaker (8), an explosion-proof vertical plate is arranged in the third cavity at the rear side of the circuit breaker (8), a fixed contact matched with the circuit connection copper rod is fixedly connected to the explosion-proof vertical plate, a copper bar connected with the fixed contact is arranged on the back surface of the explosion-proof vertical plate, the fixed contact in the third cavity in the same vertical direction shares the same copper bar, and the copper bar is connected with a main circuit.

4. The mining explosion-proof and intrinsically safe variable frequency combined switch of claim 3, wherein the first cavity and the second cavity are two independent areas formed by separating a left area (2) through an explosion-proof partition plate, the four third cavities are four isolated areas formed by separating a middle area (3) through the explosion-proof partition plate, and the four third cavities are distributed in a shape of a Chinese character 'tian'.