A general-purpose machine dual-power dual-frequency conversion speed control device

Abstract

This utility model relates to the field of variable frequency speed control devices, and discloses a general-purpose dual-power dual-frequency variable frequency speed control device for machines. It includes a sled and an explosion-proof housing mounted on the sled. The explosion-proof housing includes a partition, a left main cavity, a right main cavity, a first load wiring cavity, a second load wiring cavity, a first control wiring cavity, a second control control wiring cavity, an intrinsically safe cavity, and a second intrinsically safe cavity. The left and right main cavities are respectively located on the left and right sides within the explosion-proof housing. The partition is located between the left and right main cavities. The first and second load wiring cavities are respectively located above the opposite side of the left and right main cavities. In this utility model, when the dedicated power supply line fails or is interrupted, the backup power supply line operates through the dual-power controller. At this time, the dual-fan controller switches to operate the backup fan. When the dedicated power supply line returns to normal operation, the dual-power controller switches to operate the dedicated power supply line, and the dual-fan controller switches to operate the main fan.

Description

Technical Field

[0001] This utility model relates to the field of frequency conversion speed control devices, and in particular to a general-purpose dual-power dual-frequency conversion speed control device for machines. Background Technology

[0002] In recent years, with the development of the coal mining industry, the construction of modern mines has become an inevitable trend in future coal mine construction. To further accelerate the development of automation, mechanization, digitalization, informatization, and energy conservation in coal mines, especially regarding the advancement and reliability of ventilation fan drive technology, traditional AC frequency converters can no longer meet the special requirements of the aforementioned operating environments. To effectively and sustainably control ventilation equipment, mine equipment maintenance personnel regularly inspect and maintain the frequency converters used in the ventilation equipment.

[0003] Due to the complex internal environment and harsh climate of mines, if the frequency converters used in the existing mine ventilation equipment malfunction, it may cause problems with the operation of the ventilation equipment or even shutdown. This could lead to an increase in harmful gases in the mine and even dangerous accidents. When using frequency converters for current ventilation equipment, high safety requirements are necessary because the ventilation equipment needs to be controlled for a long time. Utility Model Content

[0004] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a general-purpose dual-power dual-frequency conversion speed control device for machines.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a general-purpose dual-power dual-frequency conversion speed control device for machinery, comprising a sled and an explosion-proof housing mounted on the sled. The explosion-proof housing includes a partition, a left main cavity, a right main cavity, a load wiring cavity one, a load wiring cavity two, a control wiring cavity one, a control wiring cavity two, an intrinsically safe cavity one, and an intrinsically safe cavity two. The left and right main cavities are respectively located on the left and right sides within the explosion-proof housing. The partition is located between the left and right main cavities. The load wiring cavity one and load wiring cavity two are respectively located above the opposite side of the left and right main cavities. The control wiring cavity one and control wiring cavity two are respectively located below the opposite side of the left and right main cavities. A front door one and a front door two are respectively located on the front side of both the left and right main cavities. Both front door one and front door two have an intrinsically safe cavity one and an intrinsically safe cavity two on their rear sides. Both the left main cavity and the right main cavity have circuit boards installed inside, and each circuit board has a core with a heat dissipation pipe installed on it. The explosion-proof housing has a heat sink cover for protecting the heat dissipation pipe on its rear side. The circuit boards in the left main cavity and the right main cavity are respectively connected to an EMC filter section, a harmonic suppression section, a rectification section, an inverter section, a cooling section, a contactor, a reactor, a terminal block, and a charging unit section. Both load wiring cavity one and load wiring cavity two have a cable entry device two installed on their rear sides. Both control wiring cavity one and control wiring cavity two have a cable entry device one installed on their rear sides. The cable entry device one is connected to the control circuit of the corresponding circuit board, and the cable entry device two is connected to the main circuit of the corresponding circuit board.

[0006] Through the above technical solution, by setting control wiring chamber 1 and control wiring chamber 2, isolating switch 1 and isolating switch 2, load wiring chamber 1 and load wiring chamber 2, left main chamber and right main chamber, intrinsically safe chamber 1 and intrinsically safe chamber 2, function button 1 and function button 2, cable entry device 1 and cable entry device 2, front door 1 and front door 2 in the explosion-proof housing, the frequency converter has two sets of circuits. When the frequency converter is in actual use, if one set of circuits fails, it can still control the ventilation fan equipment normally. It has dual-circuit input power supply and independent dual frequency converter drive characteristics. It is a multi-purpose, high-efficiency and energy-saving automatic drive control device, and has a dual-fan hot standby automatic switching function. To ensure the normal and effective operation of ventilation equipment in the mine, the frequency converter of the speed control device converts the frequency or current signal from the gas concentration sensor into an analog signal. After processing by the controller, the signal controls the frequency converter, causing it to output the corresponding frequency to control the motor's operation. This allows the speed control device to output different frequencies based on different gas concentration sensor values ​​to control the fan motor's running speed. The control panel, connected to the controller via the converter, displays and sets various parameters of the speed control device. When the dedicated power supply line fails or is interrupted, the backup power supply line operates through the dual power controller, which then switches to operate the backup fan via the dual fan controller. When the dedicated power supply line is restored to normal operation, the dual power controller switches to operate the dedicated power supply line, which then switches to operate the main fan.

[0007] As a further description of the above technical solution:

[0008] The left main cavity, right main cavity, load wiring cavity one, load wiring cavity two, control wiring cavity one, control wiring cavity two, intrinsically safe cavity one and intrinsically safe cavity two are all electrical explosion-proof cavities;

[0009] The above technical solution can isolate electrical components, ensuring that there is no interference between electrical components and that adjacent electrical components are not affected when sparks occur.

[0010] As a further description of the above technical solution:

[0011] The first cable entry device is a nut-type cable entry device, and the second cable entry device is a pressure plate-type cable entry device;

[0012] Through the above technical solutions, both cable entry device one and cable entry device two are used for fixing the wires.

[0013] As a further description of the above technical solution:

[0014] Function button 2 and function button 1 are respectively installed on the front side of front door 1 and front door 2. Both function button 2 and function button 1 are connected to the circuit board through a control circuit.

[0015] Through the above technical solution, both function button one and function button two can realize the input of data and control commands of the frequency converter.

[0016] As a further description of the above technical solution:

[0017] Isolation switch one and isolation switch two are respectively installed in the left main cavity and the right main cavity, which are far away from the side walls. Isolation switch one and isolation switch two are respectively connected to the circuit board through the control circuit.

[0018] Through the above technical solutions, both isolating switch one and isolating switch two can disconnect the power to the frequency converter.

[0019] This utility model has the following beneficial effects:

[0020] 1. In this utility model, through the control wiring chamber 1 and control wiring chamber 2, isolating switch 1 and isolating switch 2, load wiring chamber 1 and load wiring chamber 2, left main chamber and right main chamber, intrinsically safe chamber 1 and intrinsically safe chamber 2, function button 1 and function button 2, cable entry device 1 and cable entry device 2, front door 1 and front door 2 set up in the explosion-proof housing, the frequency converter has two sets of circuits. This ensures that when one set of circuits of the frequency converter fails during actual use, it can still control the ventilation equipment normally. It has dual-circuit input power supply and independent dual frequency converter drive characteristics. It is a multi-purpose, high-efficiency, and energy-saving automatic drive control device, and has a dual-fan hot standby automatic switching function. This ensures the normal and effective operation of the ventilation equipment in the mine.

[0021] 2. In this utility model, by setting up independent chambers between the load connection chamber one and the load connection chamber two, the left main chamber and the right main chamber, and the intrinsically safe chamber one and the intrinsically safe chamber two, the variable frequency drive can have excellent explosion-proof characteristics and better safety during actual operation. Attached Figure Description

[0022] Figure 1 This is a front view of a general-purpose machine dual-power dual-frequency conversion speed control device proposed in this utility model;

[0023] Figure 2 This is a left view of a general-purpose machine dual-power dual-frequency conversion speed control device proposed in this utility model;

[0024] Figure 3 This is a top view of a general-purpose dual-power dual-frequency conversion speed control device for machines proposed in this utility model.

[0025] Legend:

[0026] 1. Sled; 2. Control wiring chamber one; 3. Disconnecting switch one; 4. Load wiring chamber one; 5. Left main chamber; 6. Front door one; 7. Intrinsically safe chamber one; 8. Right main chamber; 9. Intrinsically safe chamber two; 10. Load wiring chamber two; 11. Disconnecting switch two; 12. Control wiring chamber two; 13. Function button one; 14. Function button two; 15. Cable entry device one; 16. Heat dissipation pipe; 17. Radiator cover; 18. Partition; 19. Cable entry device two; 20. Front door two; 21. Explosion-proof housing. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Reference Figure 1-3This utility model provides an embodiment of a general-purpose dual-power dual-frequency conversion speed control device, comprising a sled 1 and an explosion-proof housing 21 mounted on the sled 1. The explosion-proof housing 21 includes a partition 18, a left main cavity 5, a right main cavity 8, a load wiring cavity 1 4, a load wiring cavity 2 10, a control wiring cavity 1 2, a control wiring cavity 2 12, an intrinsically safe cavity 1 7, and an intrinsically safe cavity 2 9. The left main cavity 5 and the right main cavity 8 are respectively disposed on the left and right sides of the explosion-proof housing 21, and the partition 18 is disposed between the left main cavity 5 and the right main cavity 8. The load wiring cavity 1 4 and the load wiring cavity 2 10 are respectively disposed on the left and right sides of the explosion-proof housing 21. The control wiring cavity 1 2 and control wiring cavity 2 12 are respectively located above the left main cavity 5 and the right main cavity 8 on opposite sides. Front doors 1 6 and 2 20 are respectively located on the front sides of the left main cavity 5 and the right main cavity 8. Intrinsically safe cavity 1 7 and 2 9 are respectively located on the rear sides of front doors 1 6 and 2 20. Circuit boards are installed inside both the left main cavity 5 and the right main cavity 8, and a mechanism is mounted on each circuit board, with a heat dissipation pipe 16 mounted on the mechanism. A radiator cover for protecting the heat dissipation pipe 16 is provided on the rear side of the explosion-proof housing 21. 17. The circuit boards in the left main cavity 5 and right main cavity 8 are respectively connected to the EMC filter section, harmonic suppression section, rectification section, inverter section, cooling section, contactor, reactor, terminal block and charging unit section. Cable entry device 2 19 is installed on the rear side of the load connection cavity 1 4 and the load connection cavity 2 10. Cable entry device 1 15 is installed on the rear side of the control connection cavity 1 2 and the control connection cavity 2 12. Cable entry device 1 15 is connected to the control circuit of the corresponding circuit board, and cable entry device 2 19 is connected to the main circuit of the corresponding circuit board. The frequency converter of the speed control device converts the frequency or current signal of the gas concentration sensor into an analog signal, which is then processed by the controller to control the frequency converter, so that the frequency converter outputs the corresponding frequency to control the motor operation. This realizes that the speed control device outputs different frequencies according to different gas concentration sensor values ​​to control the running speed of the fan motor. The control panel is connected to the controller through the converter to realize the display and setting of various parameters of the speed control device. When the dedicated power supply line fails or is interrupted, the backup power supply line works through the dual power controller. At this time, the backup fan is switched to work by the dual fan controller.When the dedicated power supply line is restored to normal operation, the dual power controller switches to operate the dedicated power supply line. At this time, the dual fan controller switches to operate the main fan. The dual-circuit left main cavity 5 and right main cavity 8, along with their internally matched dual circuits, are connected to the control wiring chamber 1 2 and control wiring chamber 2 12, isolating switch 1 3 and isolating switch 2 11, load wiring chamber 1 4 and load wiring chamber 2 10, left main cavity 5 and right main cavity 8, intrinsically safe cavity 1 7 and intrinsically safe cavity 2 9, function button 1 13 and function button 2 14, cable entry device 1 15 and cable entry device 2 19, front door 1 6 and front door 2 20 within the explosion-proof housing 21. This allows the frequency converter to operate with two sets of circuits, ensuring that even if one circuit of the frequency converter malfunctions, the ventilation equipment can still be controlled normally. It features dual-circuit input power supply and independent dual frequency converter drive characteristics, making it a multi-purpose, high-efficiency, and energy-saving automatic drive control device. It also has a dual-fan hot standby automatic switching function, ensuring the normal and effective operation of the ventilation equipment in the mine. ;

[0029] Left main cavity 5, right main cavity 8, load wiring cavity 1 4, load wiring cavity 2 10, control wiring cavity 1 2, control wiring cavity 2 12, intrinsically safe cavity 1 7 and intrinsically safe cavity 2 9 are all electrical explosion-proof cavities, which can isolate electrical components individually, so that there is no influence between electrical components, and when sparks occur, they will not affect adjacent electrical components.

[0030] Cable entry device 15 is a nut-type cable entry device, and cable entry device 29 is a pressure plate-type cable entry device. Both cable entry device 15 and cable entry device 29 are used for fixing the wires.

[0031] Function buttons 14 and 13 are installed on the front sides of front door 16 and front door 20 respectively. Both function buttons 14 and 13 are connected to the circuit board through the control circuit. Both function buttons 13 and 14 can realize the input of data and control commands of the frequency converter.

[0032] The left main cavity 5 and the right main cavity 8 are respectively equipped with isolating switch 1 3 and isolating switch 2 11, which are far away from the side walls. Isolating switch 1 3 and isolating switch 2 11 are respectively connected to the circuit board through the control circuit. Both isolating switch 1 3 and isolating switch 2 11 can disconnect the power of the frequency converter.

[0033] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A general-purpose dual-power dual-frequency conversion speed control device for machinery, comprising a sled (1) and an explosion-proof housing (21) mounted on the sled (1), characterized in that: The explosion-proof enclosure (21) includes a partition (18), a left main cavity (5), a right main cavity (8), a load wiring cavity one (4), a load wiring cavity two (10), a control wiring cavity one (2), a control wiring cavity two (12), an intrinsically safe cavity one (7), and an intrinsically safe cavity two (9). The left main cavity (5) and the right main cavity (8) are respectively located on the left and right sides of the explosion-proof enclosure (21). The partition (18) is located between the left main cavity (5) and the right main cavity (8). Load connection cavity one (4) and load connection cavity two (10) are respectively located above the left main cavity (5) and the right main cavity (8) on opposite sides. Control connection cavity one (2) and control connection cavity two (12) are respectively located below the left main cavity (5) and the right main cavity (8) on opposite sides. Front doors one (6) and two (20) are respectively provided on the front side of the left main cavity (5) and the right main cavity (8). The rear side of front doors one (6) and two (20) are respectively provided. Each is provided with an intrinsically safe cavity 1 (7) and an intrinsically safe cavity 2 (9). The left main cavity (5) and the right main cavity (8) are each provided with a circuit board and a core is installed on the circuit board and a heat sink (16) is installed on the core. The explosion-proof housing (21) is provided with a heat sink cover (17) for protecting the heat sink (16). The circuit boards in the left main cavity (5) and the right main cavity (8) are respectively connected to the EMC filter section, harmonic suppression section, rectification section, inverter section, cooling section, contactor, reactor, wiring terminal and charging unit section. The load wiring cavity 1 (4) and the load wiring cavity 2 (10) are each provided with a cable entry device 2 (19) on the rear side. The control wiring cavity 1 (2) and the control wiring cavity 2 (12) are each provided with a cable entry device 1 (15) on the rear side. The cable entry device 1 (15) is connected to the control circuit of the corresponding circuit board, and the cable entry device 2 (19) is connected to the main circuit of the corresponding circuit board.

2. The general-purpose dual-power dual-frequency conversion speed control device for machines according to claim 1, characterized in that: The left main cavity (5), right main cavity (8), load wiring cavity one (4), load wiring cavity two (10), control wiring cavity one (2), control wiring cavity two (12), intrinsically safe cavity one (7) and intrinsically safe cavity two (9) are all electrical explosion-proof cavities.

3. The general-purpose dual-power dual-frequency conversion speed control device for machines according to claim 1, characterized in that: The first cable entry device (15) is a nut-type cable entry device, and the second cable entry device (19) is a pressure plate-type cable entry device.

4. The general-purpose dual-power dual-frequency conversion speed control device for machines according to claim 1, characterized in that: Function button 2 (14) and function button 1 (13) are respectively installed on the front side of front door 1 (6) and front door 2 (20). Function button 2 (14) and function button 1 (13) are both connected to the circuit board through the control circuit.

5. A general-purpose dual-power dual-frequency conversion speed control device for machines according to claim 1, characterized in that: The left main cavity (5) and the right main cavity (8) are respectively equipped with isolation switch one (3) and isolation switch two (11) on their side walls, which are far apart from each other. Isolation switch one (3) and isolation switch two (11) are respectively connected to the circuit board through the control circuit.

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