Soft start device of air compressor for underground coal mine

Abstract

The utility model relates to the technical field of coal mine mechanical equipment, in particular to a coal mine underground air compressor soft start device which comprises a power supply module, a control module, a voltage detection module and a voltage regulation module. The power supply module is respectively connected with the control module, the voltage detection module and the voltage regulation module and is used for supplying power to the control module, the voltage detection module and the voltage regulation module; the voltage detection module is used for detecting the voltage output by the power supply module and outputting a voltage detection signal; the control module is connected with the voltage detection module and is used for receiving the voltage detection signal and outputting a control signal when a value reflected by the voltage detection signal reaches a voltage preset value; the voltage regulating module is connected with the control module and used for receiving the control signal, and the voltage regulating module controls the voltage input into the air compressor after receiving the control signal. The air compressor has the effect of reducing damage to the air compressor.

Description

Technical Field

[0001] The present application relates to the technical field of coal mine mechanical equipment, and in particular to a soft starting device for an air compressor used in underground coal mines. Background Art

[0002] At present, in underground coal mine operations, air compressors are key gas supply equipment. Their startup process has a great impact on the power grid and also has a certain impact on the mechanical stress of the air compressor itself. Existing air compressor startup methods mostly use direct startup or star-delta startup. These startup methods will generate large currents and mechanical stresses at the moment of startup, which will not only cause impacts on the power grid, but also may cause damage to the air compressor. Utility Model Content

[0003] In order to reduce damage to the air compressor, the present application provides a soft starting device for an air compressor used in underground coal mines.

[0004] The present application provides a soft start device for an air compressor used in underground coal mines, which adopts the following technical solution:

[0005] A soft starting device for an air compressor used in underground coal mines, comprising a power supply module, a control module, a voltage detection module and a voltage regulating module;

[0006] The power supply module is connected to the control module, the voltage detection module and the voltage regulation module respectively, and is used to supply power to the control module, the voltage detection module and the voltage regulation module;

[0007] The voltage detection module is used to detect the voltage output by the power supply module and output a voltage detection signal;

[0008] The control module is connected to the voltage detection module, and is used to receive a voltage detection signal, and output a control signal when the value reflected by the voltage detection signal reaches a preset voltage value;

[0009] The voltage regulating module is connected to the control module and is used to receive a control signal. After receiving the control signal, the voltage regulating module controls the voltage input to the air compressor.

[0010] By adopting the above technical solution, the voltage output by the power supply module is detected, and the voltage detection signal is input into the control module. The control module compares the value reflected by the voltage detection signal with the preset voltage value. When the voltage reaches the preset value, the control module controls the voltage regulating module to adjust the voltage, thereby achieving the effect of reducing damage to the air compressor.

[0011] Optionally, the voltage regulating module is a three-phase anti-parallel thyristor.

[0012] By adopting the above technical solution, the voltage regulating module adopts three-way anti-parallel thyristor, and the trigger pulse of the three-way anti-parallel thyristor can be controlled by the control module, so as to input and adjust the voltage of the air compressor, thereby realizing soft starting.

[0013] Optionally, the control module is a PLC controller or a single chip microcomputer.

[0014] Optionally, it also includes a soft start cabinet, which includes a chassis and a cover, and the cover is installed at the open end of the chassis and is detachably connected to the chassis; the control module, voltage detection module and voltage regulation module are all installed in the soft start cabinet.

[0015] By adopting the above technical solution, the soft start cabinet can protect the control module, the voltage detection module and the voltage regulation module.

[0016] Optionally, a plurality of connecting grooves are provided inside the chassis; a plurality of limiting grooves corresponding to the connecting grooves are provided on the outer wall of the cover; a plurality of limiting components are provided on the cover, the limiting components are slidably installed in the limiting grooves, and the limiting components are used to connect the chassis and the cover.

[0017] Optionally, one of the limiting grooves corresponds to one of the limiting components.

[0018] Optionally, a limit hole is opened at one end of the cover facing away from the interior of the chassis, the limit hole is opened horizontally, and the limit hole is communicated with the limit slot; the limit assembly includes a limit spring, a limit pin and a limit rod, the limit spring is located in the limit slot and fixedly connected to the bottom of the limit slot; one end of the limit pin is connected to the limit spring, and the other end is located in the connecting slot; one end of the limit rod is fixedly connected to the limit pin, and the other end passes through the limit hole and is located outside the cover.

[0019] By adopting the above technical solution, when the staff wants to open the machine cover, they can slide the limit rod, the limit rod compresses the limit spring, and drives the limit pin to slide out of the connecting groove, thereby separating the machine cover and the chassis, making it easier to disassemble the machine cover and the chassis.

[0020] Optionally, a heat dissipation hole is opened on the chassis, and a heat dissipation fan is installed at the heat dissipation hole.

[0021] By adopting the above technical solution, the control module, the voltage detection module and the voltage regulating module will generate heat during operation, and the cooling fan can achieve a cooling effect, thereby improving the working efficiency of the control module, the voltage detection module and the voltage regulating module.

[0022] In summary, the present application includes at least one of the following beneficial technical effects:

[0023] 1. Detect the voltage output by the power supply module and input the voltage detection signal to the control module. The control module will compare the value reflected by the voltage detection signal with the preset voltage value. When the voltage reaches the preset value, the control module controls the trigger pulse of the three-phase anti-parallel thyristor, thereby inputting the voltage to adjust the air compressor, realizing soft start, and thus achieving the effect of reducing damage to the air compressor.

[0024] 2. When the staff wants to open the machine cover, they can slide the limit rod, the limit rod compresses the limit spring, and drives the limit pin to slide out of the connecting groove, so that the machine cover and the chassis can be separated, which is convenient for the disassembly of the machine cover and the chassis. When there is a problem with the control module, the voltage detection module and the voltage regulating module, it is convenient for the staff to repair. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a system schematic diagram of an air compressor soft start device for underground coal mines according to an embodiment of the present application.

[0026] Figure 2 It is a structural cross-sectional view of an air compressor soft starting device for underground coal mines according to an embodiment of the present application.

[0027] Figure 3 yes Figure 2 Enlarged view of point A.

[0028] Explanation of the accompanying drawings: 1. Power supply module; 2. Control module; 3. Voltage detection module; 4. Voltage regulation module; 5. Soft start cabinet; 51. Chassis; 511. Connection slot; 512. Heat dissipation hole; 513. Cooling fan; 52. Machine cover; 521. Limiting slot; 522. Limiting assembly; 5221. Limiting spring; 5222. Limiting pin; 5223. Limiting rod; 523. Limiting hole. DETAILED DESCRIPTION

[0029] The following is combined with Figure 1-3 This application is described in further detail.

[0030] The embodiment of the present application discloses a soft starting device for an air compressor used in underground coal mines.

[0031] Reference Figure 1 , Figure 2 and Figure 3 A soft start device for an air compressor used underground in a coal mine comprises a power supply module 1, a control module 2, a voltage detection module 3, a voltage regulating module 4 and a soft start cabinet 5. The control module 2, the voltage detection module 3 and the voltage regulating module 4 are all installed inside the soft start cabinet 5, and the soft start cabinet 5 can protect the control module 2, the voltage detection module 3 and the voltage regulating module 4.

[0032] The power supply module 1 is respectively connected to the control module 2, the voltage detection module 3 and the voltage regulation module 4, and the power supply module 1 can provide power to the control module 2, the voltage detection module 3 and the voltage regulation module 4. In the embodiment of the present application, the power supply module 1 is a power source.

[0033] The voltage detection module 3 is used to detect the voltage output by the power supply module 1 and output a voltage detection signal; the control module 2 is connected to the voltage detection module 3 to receive the voltage detection signal, and when the value reflected by the voltage detection signal reaches the voltage preset value, the control signal is output; the voltage regulating module 4 is connected to the control module 2 to receive the control signal, and the voltage regulating module 4 controls the voltage input to the air compressor after receiving the control signal. In the embodiment of the present application, the voltage detection module 3 adopts a voltage sensor, the control module 2 adopts a PLC controller or a single-chip microcomputer, and the voltage regulating module 4 adopts a three-phase reverse parallel thyristor. Therefore, during the startup process, as the conduction angle of the thyristor gradually increases, the output voltage also gradually increases, and the air compressor accelerates from zero until the thyristor is fully turned on, realizing the stepless smooth start of the air compressor. At the same time, through the precise control of the control module 2, the maximum values ​​of the starting torque and the starting current can be set according to the load conditions to achieve the best starting effect. In the embodiment of the present application, the voltage preset value is set according to the actual situation.

[0034] One end of the chassis 51 is open, and the cover 52 is installed at the open end of the chassis 51. Two connecting grooves 511 are provided on the inner wall of the chassis 51, and the two grooves are located on the inner walls of the two chassis 51 and correspond to each other; two limiting grooves 521 corresponding to the connecting grooves 511 are provided on the cover 52, and at the same time, a limiting hole 523 in the horizontal direction is also provided on the cover 52, and one limiting hole 523 is connected to one limiting groove 521; a limiting assembly 522 is also provided on the cover 52, and the limiting assembly 522 includes a limiting spring 5221, a limiting latch 5222 and a limiting spring 5221. Rod 5223, wherein the limit spring 5221 is located at the bottom of the limit groove 521, and one end of the limit spring 5221 is fixedly connected to the bottom of the limit groove 521, the limit pin 5222 is slidably installed in the limit groove 521, one end of the limit pin 5222 is fixedly connected to the limit spring 5221, and the other end is located in the connecting groove 511, one end of the limit rod 5223 is fixedly connected to the limit pin 5222, and the other end passes through the limit hole 523 and is located outside the machine cover 52.

[0035] When any one or more of the control module 2, the voltage detection module 3 and the voltage regulating module 4 have problems, the staff needs to separate the machine cover 52 and the chassis 51, and the staff needs to slide the limit rod 5223, and the limit rod 5223 drives the limit latch 5222 to slide out of the connecting groove 511. At this time, the machine cover 52 and the chassis 51 can be separated; when the staff needs to install the machine cover 52 and the chassis 51 together, the staff slides the limit rod 5223, and the limit rod 5223 drives the limit latch 5222 to compress the limit spring 5221, and places the machine cover 52 at the open end of the chassis 51. When the notch of the limit slot 521 is consistent with the notch of the connecting groove 511, the staff releases the limit rod 5223. At this time, the limit spring 5221 is reset, and the limit latch 5222 slides into the connecting groove 511, thereby achieving a labor-saving effect.

[0036] Heat is generated during the operation of the control module 2 , the voltage detection module 3 and the voltage regulating module 4 . If the heat is too large, the working efficiency will be affected. Therefore, a heat dissipation hole 512 and a heat dissipation fan 513 are provided on the chassis 51 . The heat dissipation fan 513 is installed at the heat dissipation hole 512 and is fixedly connected to the chassis 51 .

[0037] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A soft starting device for an air compressor used in underground coal mines, characterized in that: It comprises a power supply module (1), a control module (2), a voltage detection module (3) and a voltage regulation module (4); The power supply module (1) is connected to the control module (2), the voltage detection module (3) and the voltage regulation module (4) respectively, and is used to supply power to the control module (2), the voltage detection module (3) and the voltage regulation module (4); The voltage detection module (3) is used to detect the voltage output by the power supply module (1) and output a voltage detection signal; The control module (2) is connected to the voltage detection module (3) and is used to receive a voltage detection signal and output a control signal when the value reflected by the voltage detection signal reaches a preset voltage value; The voltage regulating module (4) is connected to the control module (2) and is used to receive a control signal. After receiving the control signal, the voltage regulating module (4) controls the voltage input to the air compressor.

2. The air compressor soft start device for underground coal mine according to claim 1, characterized in that: The voltage regulating module (4) is a three-phase anti-parallel thyristor.

3. The air compressor soft start device for underground coal mine according to claim 1, characterized in that: The control module (2) is a PLC controller or a single chip microcomputer.

4. The soft starting device for an air compressor used in underground coal mines according to claim 1, characterized in that: The invention also comprises a soft start cabinet (5), wherein the soft start cabinet (5) comprises a chassis (51) and a cover (52), wherein the cover (52) is mounted at an open end of the chassis (51) and is detachably connected to the chassis (51); and the control module (2), the voltage detection module (3) and the voltage regulation module (4) are all mounted in the soft start cabinet (5).

5. The air compressor soft start device for underground coal mine according to claim 4, characterized in that: The chassis (51) is provided with a plurality of connection grooves (511) on its interior; the cover (52) is provided with a plurality of limit grooves (521) corresponding to the connection grooves (511) on its outer wall; the cover (52) is provided with a plurality of limit assemblies (522); the limit assemblies (522) are slidably mounted in the limit grooves (521); and the limit assemblies (522) are used to connect the chassis (51) and the cover (52).

6. The air compressor soft start device for underground coal mine according to claim 5, characterized in that: One of the limiting grooves (521) corresponds to one of the limiting components (522).

7. The soft starting device for an air compressor used in underground coal mines according to claim 5, characterized in that: A limiting hole (523) is provided at one end of the cover (52) facing away from the inside of the chassis (51); the limiting hole (523) is provided horizontally, and the limiting hole (523) is communicated with the limiting groove (521); the limiting assembly (522) comprises a limiting spring (5221), a limiting latch (5222) and a limiting rod (5223); the limiting spring (5221) is located inside the limiting groove (521) and is fixedly connected to the bottom of the limiting groove (521); one end of the limiting latch is connected to the limiting spring (5221), and the other end is located in the connecting groove (511); one end of the limiting rod (5223) is fixedly connected to the limiting latch (5222), and the other end passes through the limiting hole (523) and is located outside the cover (52).

8. The air compressor soft start device for underground coal mine according to claim 4, characterized in that: The chassis (51) is provided with a heat dissipation hole (512), and a heat dissipation fan (513) is installed at the heat dissipation hole (512).

Images