Coal mine ventilation safety power supply device

Abstract

The utility model relates to the technical field of coal mine ventilation, and discloses a coal mine ventilation safety power supply device which comprises a high-voltage pressure fan and a high-voltage switch cabinet, the high-voltage pressure fan is driven by a high-voltage motor, the high-voltage switch cabinet is used for controlling and protecting the high-voltage motor, and a contactor is installed on a circuit breaker of the high-voltage switch cabinet. A suction coil of the contactor is powered by a control loop of the high-pressure fan; when the control loop is normal, the contactor is kept in a pull-in state, and normal work of the high-voltage switch cabinet is ensured. Once a control loop loses power, the contactor is automatically switched off, a power supply is quickly cut off, equipment is prevented from continuously running in an abnormal state, so that safety accidents are avoided, the circuit breaker and the contactor are jointly mounted on a mounting part, and the mounting part comprises a mounting panel, a junction box, a buckling block A and a buckling block B. Due to the integrated design of the mounting parts, the equipment is more convenient to maintain and overhaul. And the design of the buckling blocks allows quick mounting and dismounting, so that the maintenance efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of coal mine ventilation, and in particular relates to a coal mine ventilation safety power supply device. Background Art

[0002] High-pressure air compressors, as a vital ventilation device, are widely used in mine ventilation systems. Driven by high-voltage motors, they generate powerful airflows, providing necessary ventilation for coal mines. High-voltage switchgear is crucial for ensuring the proper operation of air compressors. When equipment ages, is improperly maintained, or experiences operational errors, the control circuit may lose power. The high-voltage motor continues to operate, but due to a control circuit failure, the mesh press cannot be effectively controlled, posing a safety risk. During operation, the high-voltage motor generates a certain amount of back electromotive force, allowing the air compressor to continue operating even after the high-voltage switchgear control circuit loses power. Without effective control, the internal pressure of the air compressor continues to rise, ultimately causing an explosion and significant loss of life and property.

[0003] In order to ensure safe and stable operation, a contactor is installed on the circuit breaker of the high-voltage switchgear. Its pull-in coil is powered by the air compressor control circuit. When the control circuit loses power, the contactor coil is automatically disconnected to ensure that the high-voltage switchgear circuit breaker loses power and the high-voltage motor of the air compressor stops working. Finally, the high-voltage air compressor is shut down, ensuring its stable operation and greatly improving the safety of equipment operation. A coal mine ventilation safety power supply device is proposed to solve the above problems. Utility Model Content

[0004] The present invention aims to solve the technical problem that in the prior art, when a control circuit of a high-voltage switch cabinet loses power, the high-voltage motor is still running, causing safety problems.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] A coal mine ventilation safety power supply device includes a high-voltage air compressor and a high-voltage switchgear. The high-voltage air compressor is driven by a high-voltage motor. The high-voltage switchgear is used to control and protect the high-voltage motor. A contactor is installed on the circuit breaker of the high-voltage switchgear. The contactor's pickup coil is powered by the control circuit of the high-voltage air compressor.

[0007] The circuit breaker and contactor are installed together on the mounting part, and the mounting part is installed on the high-voltage switchgear; the mounting part includes a mounting panel, a junction box provided on the mounting panel and used to separate the circuit breaker and the contactor, a snap-on block A provided on the mounting panel and adapted for horizontal sliding snap-on with the circuit breaker, and a snap-on block B provided on the mounting panel and adapted for horizontal sliding snap-on with the contactor.

[0008] Preferably, when the control circuit is powered normally, the contactor's pull-in coil works, causing the contactor to close and the circuit breaker of the high-voltage switch cabinet to work normally; when the control circuit loses power, the contactor's pull-in coil also loses power, the contactor is released, and the circuit breaker of the high-voltage switch cabinet is automatically disconnected.

[0009] When the control circuit is normal, the contactor remains closed to ensure the normal operation of the high-voltage switchgear. Once the control circuit loses power, the contactor automatically opens, quickly cutting off the power supply to prevent the equipment from continuing to operate in an abnormal state, thereby avoiding safety accidents.

[0010] Preferably, the junction box is provided with a lead hole A for matching the circuit breaker wiring lead and a lead hole B for matching the contactor wiring lead. A cover is buckled on the wiring slot of the junction box, and a hand-held position is provided on the cover.

[0011] Preferably, the back of the circuit breaker housing is provided with a recessed opening A for the insertion of the snap-fit block A and two convex snap-fit grooves connected to the recessed openings A. A positioning snap-fit block A slides within the convex snap-fit grooves and engages with the convex snap-fit blocks and snaps into the upper snap-fit grooves A of the snap-fit block A. This securely connects the circuit breaker to the mounting panel, ensuring stability during operation.

[0012] Preferably, the back of the contactor housing is provided with a groove B for fitting the buckle block B and an open slot for connecting the groove B. A positioning buckle block B is limitedly slidable in the open slot and snapped into the buckle groove B on the buckle block B. This makes the contactor easy to install and remove.

[0013] Preferably, a mounting plate is provided in the opening slot, extending through the vertical through-hole on the positioning buckle block B. A spring is fixedly provided on the mounting plate, connected to the positioning buckle block B and retained in the vertical through-hole. A protrusion is provided on one side of the positioning buckle block B, which is retained in a retaining groove on one side of the contactor housing. This prevents the contactor from shifting easily when subjected to external impact.

[0014] Preferably, the high-pressure air compressor is installed on a mounting frame.

[0015] Compared with the prior art, the technical effects and advantages of the utility model are:

[0016] The high-voltage air compressor in this coal mine ventilation safety power supply system is driven by a high-voltage motor, which is controlled and protected by a high-voltage switchgear to ensure safe operation. A contactor is installed on the circuit breaker, and its pull-in coil is powered by the air compressor's control circuit. When the control circuit is functioning normally, the contactor closes, keeping the circuit breaker closed. When the control circuit loses power, the contactor releases, opening the circuit breaker and thus disconnecting the power supply. The high-voltage air compressor is mounted on a dedicated mounting bracket for increased stability and ease of maintenance. If the control circuit loses power, the contactor automatically opens, quickly disconnecting the power supply, preventing the equipment from continuing to operate under abnormal conditions and avoiding safety accidents.

[0017] The circuit breaker and contactor are mounted together on the mounting bracket, reducing space and simplifying installation. The integrated design of the mounting bracket facilitates maintenance and repair. The snap-on design allows for quick installation and removal, improving maintenance efficiency. The lead holes and cover on the terminal box protect the wiring, preventing the risk of accidental contact and short circuits. The handheld position makes installation and operation more user-friendly.

[0018] The grooves and convex grooves on the back of the circuit breaker and contactor housings provide a secure connection to the mounting panel, ensuring stability during operation. Springs and positioning blocks provide additional security, preventing the contactor from shifting easily in the event of external impact. The mounting plate and spring design within the open slots facilitate contactor installation and removal. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of the circuit breaker, contactor and mounting parts of the utility model;

[0020] Figure 2 This is a schematic structural diagram of the mounting member of the utility model from a first perspective;

[0021] Figure 3 This is a structural diagram of the mounting member of the utility model from a second perspective;

[0022] Figure 4 This is an exploded view of the mounting member of the present utility model;

[0023] Figure 5 This is a schematic structural diagram of the circuit breaker of the utility model;

[0024] Figure 6 This is a schematic diagram of the structure of the contactor of the utility model;

[0025] Figure 7 This is a schematic structural diagram of the high-pressure air compressor of the utility model;

[0026] Figure 8 This is a connection diagram of the utility model.

[0027] In the figure: 1. High-voltage air compressor; 2. High-voltage motor; 3. High-voltage switchgear; 4. Circuit breaker; 41. Groove A; 42. Convex buckle groove; 43. Positioning buckle block A; 5. Contactor; 51. Groove B; 52. Opening groove; 53. Positioning buckle block B; 54. Mounting plate; 55. Vertical through hole; 56. Spring; 57. Bump; 6. Pull-in coil; 7. Control circuit; 8. Mounting part; 81. Mounting panel; 82. Junction box; 83. Buckle block A; 84. Buckle block B; 85. Lead hole A; 86. Lead hole B; 87. Cover; 88. Handle position; 89. Buckle groove A; 810. Buckle groove B; 9. Mounting frame. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] The following is combined with Figure 1-8 To further explain this application,

[0030] The present application discloses a coal mine ventilation safety power supply device, comprising a high-voltage air compressor 1 and a high-voltage switchgear 3. The high-voltage air compressor 1 is driven by a high-voltage motor 2. The high-voltage switchgear 3 is used to control and protect the high-voltage motor 2. A contactor 5 is mounted on a circuit breaker 4 of the high-voltage switchgear 3. The pull-in coil 6 of the contactor 5 is powered by a control circuit 7 of the high-voltage air compressor 1. The high-voltage air compressor 1 is mounted on a mounting frame 9. Mounting the high-voltage air compressor 1 on a dedicated mounting frame 9 provides better support and stability, reduces the impact of equipment vibration on the entire system, and also facilitates equipment maintenance and repair.

[0031] When the control circuit 7 is powered normally, the pull-in coil 6 of the contactor 5 works, causing the contactor 5 to be pulled in, and the circuit breaker 4 of the high-voltage switchgear 3 to work normally; when the control circuit 7 loses power, the pull-in coil 6 of the contactor 5 is also de-energized, and the contactor 5 is released, causing the circuit breaker 4 of the high-voltage switchgear 3 to be automatically disconnected.

[0032] Thus, when the control circuit 7 loses power, the contactor 5 opens, and the circuit breaker 4 of the high-voltage switchgear 3 also opens, thereby cutting off the power supply to the high-voltage motor 2 and stopping the air compressor, ensuring the safe and stable operation of the system. In this way, the operational safety of the equipment is greatly improved, and safety accidents caused by the loss of power in the control circuit 7 are avoided.

[0033] When the control circuit 7 is normal, the contactor 5 remains in the energized state, ensuring the normal operation of the high-voltage switchgear 3. Once the control circuit 7 loses power, the contactor 5 automatically opens, quickly cutting off the power supply to prevent the equipment from continuing to operate in an abnormal state, thereby avoiding safety accidents.

[0034] The circuit breaker 4 and contactor 5 are mounted together on a mounting member 8, which is mounted on the high-voltage switchgear 3. This design saves space, simplifies installation, and facilitates maintenance and repair. The integrated design of the mounting member 8 also helps improve overall safety and reliability.

[0035] The mounting member 8 includes a mounting panel 81, a junction box 82 provided on the mounting panel 81 and used to separate the circuit breaker 4 and the contactor 5, a snap-on block A83 provided on the mounting panel 81 and adapted to engage with the circuit breaker 4 for horizontal sliding snap-on connection, and a snap-on block B84 provided on the mounting panel 81 and adapted to engage with the contactor 5 for horizontal sliding snap-on connection.

[0036] The junction box 82 is provided with lead holes A85 for the wiring leads of the circuit breaker 4 and lead holes B86 for the wiring leads of the contactor 5. A cover 87 is fastened to the wiring slot of the junction box 82, and a handle 88 is provided on the cover 87. The lead holes facilitate wiring operations, while the cover 87 not only protects the wiring but also reduces the risk of accidental contact and short circuits. The provision of the handle 88 makes installation and operation more user-friendly.

[0037] The design of the mounting member 8 helps to clearly distinguish and isolate the circuit breaker 4 and the contactor 5, reducing the risk of misoperation. The design of the snap-on block A83 and the snap-on block B84 allows for quick installation and removal of the equipment, improving maintenance efficiency.

[0038] The back of the circuit breaker 4 housing features a recessed opening A41 for the snap-in block A83 and two convex recesses 42 that connect to recessed openings A41. A positioning block A43 slides within the convex recess 42 and engages with it, snapping into the upper recess A89 of the snap-in block A83. The snap-in engagement of the positioning block A43 with the upper recess A89 of the snap-in block A83 on the back of the circuit breaker 4 housing provides a secure connection between the circuit breaker 4 and the mounting panel 81, ensuring stability during operation.

[0039] The back of the contactor 5 housing is provided with a recessed opening B51 for inserting the snap-in block B84 and an open slot 52 that connects to the recessed opening B51. A positioning snap block B53 slides within the open slot 52 and engages with the upper snap-in slot B810 of the snap-in block B84. This design provides a secure connection between the contactor 5 and the mounting panel 81, facilitating easy installation and removal of the contactor 5.

[0040] A mounting plate 54 is provided within the opening 52, extending through a vertical through-hole 55 on the positioning buckle block B53. A spring 56 is fixedly mounted on the mounting plate 54, connected to the positioning buckle block B53 and retained within the vertical through-hole 55. A protrusion 57 is provided on one side of the positioning buckle block B53, which is retained within a retaining groove on one side of the housing of the contactor 5. By pulling or releasing the positioning buckle block B53, the positioning buckle block B53 can be snapped into or away from the retaining groove B810 on the connecting block B84, making it easier to install and remove the contactor 5. The use of the spring 56 also provides additional safety, preventing the contactor 5 from easily shifting in the event of an external impact.

[0041] In general, the design of this coal mine ventilation safety power supply device aims to improve the operational safety of the equipment while taking into account the ease of operation and maintenance efficiency, thereby ensuring the stable and reliable operation of the coal mine ventilation system.

[0042] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A coal mine ventilation safety power supply device, comprising a high-voltage air compressor (1) and a high-voltage switch cabinet (3), characterized in that: The high-voltage air compressor (1) is driven by a high-voltage motor (2), a high-voltage switch cabinet (3) is used to control and protect the high-voltage motor (2), a contactor (5) is installed on a circuit breaker (4) of the high-voltage switch cabinet (3), and a pull-in coil (6) of the contactor (5) is powered by a control circuit (7) of the high-voltage air compressor (1); The circuit breaker (4) and the contactor (5) are mounted together on a mounting member (8), and the mounting member (8) is mounted on a high-voltage switch cabinet (3); The mounting member (8) comprises a mounting panel (81), a junction box (82) provided on the mounting panel (81) and used to separate the circuit breaker (4) and the contactor (5), a buckle block A (83) provided on the mounting panel (81) and adapted to be horizontally slidably buckled with the circuit breaker (4), and a buckle block B (84) provided on the mounting panel (81) and adapted to be horizontally slidably buckled with the contactor (5).

2. A coal mine ventilation safety power supply device according to claim 1, characterized in that: When the control circuit (7) is powered normally, the pull-in coil (6) of the contactor (5) operates, causing the contactor (5) to be pulled in, and the circuit breaker (4) of the high-voltage switch cabinet (3) to operate normally; when the control circuit (7) loses power, the pull-in coil (6) of the contactor (5) is also de-energized, and the contactor (5) is released, causing the circuit breaker (4) of the high-voltage switch cabinet (3) to be automatically disconnected.

3. A coal mine ventilation safety power supply device according to claim 1, characterized in that: The junction box (82) is provided with a lead hole A (85) for matching the wiring lead of the circuit breaker (4) and a lead hole B (86) for matching the wiring lead of the contactor (5). A cover (87) is buckled on the wiring slot of the junction box (82), and a hand-held position (88) is provided on the cover (87).

4. A coal mine ventilation safety power supply device according to claim 1, characterized in that: The back of the circuit breaker (4) housing is provided with a groove opening A (41) for fitting the buckle block A (83) and two convex buckle grooves (42) connected to the groove openings A (41). A positioning buckle block A (43) is slidably connected to the convex buckle groove (42) and is engaged with the convex buckle groove (42) and is inserted into the buckle groove A (89) on the buckle block A (83).

5. The coal mine ventilation safety power supply device according to claim 1, characterized in that: The back of the contactor (5) housing is provided with a groove opening B (51) for fitting the buckle block B (84) to be inserted and an opening groove (52) provided for connecting the groove opening B (51). A positioning buckle block B (53) is provided in the opening groove (52) for limited sliding engagement and is engaged in the buckle groove B (810) on the buckle block B (84).

6. A coal mine ventilation safety power supply device according to claim 5, characterized in that: A mounting plate (54) is provided in the opening groove (52) and is provided through the vertical through hole (55) on the positioning buckle block B (53). A spring (56) connected to the positioning buckle block B (53) and limited in the vertical through hole (55) is fixed on the mounting plate (54). A protrusion (57) is provided on one side of the positioning buckle block B (53) and limited in the limiting groove on one side of the contactor (5) housing.

7. A coal mine ventilation safety power supply device according to claim 1, characterized in that: The high-pressure air compressor (1) is mounted on the mounting frame (9).

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