Downhole vacuum power distribution device

Abstract

The utility model discloses a kind of underground vacuum power distribution unit, belong to underground power supply equipment field, solve the problem that existing high-voltage vacuum power distribution unit of high service life in underground cannot realize the function of bus tie function.The utility model includes the main line connected with permanent magnet controller, first loop and second loop are equipped on main line, first switch and first coil are equipped on first loop, second switch and second coil are equipped on second loop, third switch, fourth switch and fifth switch are sequentially equipped between first switch and first coil in main line.The utility model principle is simple, and strong realization can be realized, through low cost, the continuous power supply of underground substation is realized, avoid affecting normal and safe production of mine, improve the safety and reliability of double-loop power supply, with extremely strong popularization.

Description

Technical Field

[0001] This utility model belongs to the field of underground power supply equipment, specifically relating to an underground vacuum power distribution device. Background Technology

[0002] In the coal mine safety production system, the underground substation serves as the core hub for power transmission, and its power supply stability directly determines the normal and safe operation of critical systems such as underground ventilation, drainage, and transportation. Currently, underground coal mine substations are required to use dual-circuit power supply to ensure stable power supply. When one circuit fails, the other circuit must bear the entire load within the substation through the bus tie switch.

[0003] However, currently, some sites have replaced their old bus tie switches with high-voltage vacuum distribution devices, connecting their power supply side to the underground first circuit power supply side and their load side to the underground second circuit power supply side. When the underground second circuit loses power, the permanent magnet controller controlling the opening and closing operation of the high-voltage vacuum distribution device is energized because the power supply side of the bus tie switch is energized, allowing the switch to close. In this case, the first circuit can handle all the loads in the substation. However, when the underground first circuit loses power, the permanent magnet controller control circuit of the bus tie switch is de-energized because the second circuit is connected to the load side of the bus tie switch, so it cannot complete the closing operation. The second circuit cannot handle all the loads in the substation, affecting the normal and safe production of the mine. Utility Model Content

[0004] This utility model provides a downhole vacuum power distribution device to solve the problem that existing downhole high-voltage vacuum power distribution devices with long service life cannot realize the bus connection function.

[0005] The technical solution of this utility model is: a downhole vacuum power distribution device, including a main line connected to a permanent magnet controller, a first circuit and a second circuit on the main line, a first switch and a first coil on the first circuit, a second switch and a second coil on the second circuit, and a third switch, a fourth switch and a fifth switch sequentially arranged between the first switch and the first coil on the main line.

[0006] As a further improvement of this utility model, a voltage transformer is provided on one side of the main line to prevent power outages.

[0007] As a further improvement of this utility model, the first switch and the fourth switch achieve joint control.

[0008] As a further improvement of this utility model, the second switch, the third switch and the fifth switch achieve joint control.

[0009] The beneficial effects of this utility model are as follows: This utility model constructs an underground vacuum power distribution device through a first circuit and a second circuit. This allows the permanent magnet controller of the bus tie switch to be powered on in time to complete the bus tie switch closing operation even if one circuit fails. A locking device formed by the first and second coils prevents the possibility of short circuits caused by simultaneous power supply from both circuits, ensuring power supply safety. This utility model also uses a 100V AC power supply provided by a voltage transformer to keep the permanent magnet controller operating normally, ensuring that both circuits can complete the bus tie switch closing operation in a timely manner. This allows the second circuit to quickly take over the entire load of the substation, preventing power loss to critical equipment such as the main drainage pump and ventilation fan, and ensuring the continuity of mine production. This utility model has a simple principle, high feasibility, and achieves continuous power supply to the underground substation at low cost, avoiding disruption to normal and safe mine production. It improves the safety and reliability of dual-circuit power supply and has strong applicability. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of this utility model.

[0011] In the diagram: 1. Permanent magnet controller; 2. Main circuit; 3. First circuit; 4. Second circuit; 5. First switch; 6. First coil; 7. Second switch; 8. Second coil; 9. Third switch; 10. Fourth switch; 11. Fifth switch; 12. Voltage transformer. Detailed Implementation

[0012] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0013] like Figure 1 As shown, an underground vacuum power distribution device includes a main line 2 connected to a permanent magnet controller 1. The main line 2 is provided with a first circuit 3 and a second circuit 4. The first circuit 3 is provided with a first switch 5 and a first coil 6. The second circuit 4 is provided with a second switch 7 and a second coil 8. The main line 2 is provided with a third switch 9, a fourth switch 10 and a fifth switch 11 in sequence between the first switch 5 and the first coil 6.

[0014] A voltage transformer 12 is installed on one side of the main line 2.

[0015] The first switch 5 and the fourth switch 10 achieve joint control.

[0016] The second switch 7, the third switch 9, and the fifth switch 11 achieve joint control.

[0017] Under normal circumstances, main line 2 operates normally, first circuit 3 is energized, i.e., first switch 5 is closed and the contact does not operate, first coil 6 is energized, second coil 8 is not energized, the normally open contact of third switch 9 is closed, the permanent magnet controller is energized, and the bus tie switch can open and close normally. At this time, the normally closed contact of second switch 7 is open, second coil 8 is de-energized, and the normally open contact of fourth switch 10 does not operate. The two power supplies cannot supply power to the permanent magnet controller, preventing the two power supplies from being energized at the same time and causing a short circuit in the equipment.

[0018] When one power supply fails, the first coil 6 is de-energized, and the third switch 9 returns to its normally open state. At this time, one power supply cannot supply power to the permanent magnet controller, but the second power supply is energized. At this time, the contacts of the second switch 7 are in the closed state, the second coil 8 is energized, the fourth switch 10 changes from normally open to closed state, and the fifth switch 11 returns to the closed state due to the de-energization of the first coil 1. The permanent magnet controller is energized, and the bus tie switch can still open and close normally.

Claims

1. A downhole vacuum power distribution device, comprising a main line (2) connected to a permanent magnet controller (1), characterized in that: The main line (2) is provided with a first circuit (3) and a second circuit (4). The first circuit (3) is provided with a first switch (5) and a first coil (6). The second circuit (4) is provided with a second switch (7) and a second coil (8). The main line (2) is provided with a third switch (9), a fourth switch (10) and a fifth switch (11) in sequence between the first switch (5) and the first coil (6).

2. The downhole vacuum power distribution device according to claim 1, characterized in that: A voltage transformer (12) is provided on one side of the main line (2).

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