Three-station mining high-voltage vacuum power distribution device with vacuum arc-extinguishing grounding switch

Abstract

The invention relates to the technical field of high-voltage vacuum power distribution, in particular to a mining high-voltage vacuum power distribution device with a three-station vacuum arc-extinguishing grounding switch, which comprises a mounting frame, a plum blossom contact, a conductive band, a vacuum tube, an adjusting mechanism and a driving mechanism, three groups of mounting shells are arranged at the top of the mounting frame; three groups of plum blossom contacts are arranged and are in one-to-one correspondence with the mounting shells; three groups of conductive bands are arranged and are in one-to-one correspondence with the mounting shells, and the conductive bands are arranged in the mounting shells; three groups of vacuum tubes are arranged and are in one-to-one correspondence with the conductive bands; three groups of adjusting mechanisms are arranged and are in one-to-one correspondence with the conductive bands; and the driving mechanism is arranged in the mounting frame. The vacuum circuit breaker is controlled to be switched on, grounding of the load end is achieved through the three-phase vacuum tube arc extinguishing chamber, grounding arc light is introduced into the vacuum tube for arc extinguishing, and a series of potential safety hazards caused by the fact that the contact time of a contact is difficult to control manually, the moving contact time is long, the spark residence time is long, the spark is large and the arc extinguishing time is long are thoroughly solved.

Description

Technical Field

[0001] The present invention relates to the technical field of high - voltage vacuum power distribution, and particularly relates to a mine - used high - voltage vacuum power distribution device with a three - position vacuum arc - extinguishing grounding switch. Background Art

[0002] During the long - term operation of high - voltage power distribution devices, various components will show different degrees of aging and damage. If not repaired and replaced in time, it will ultimately lead to failures. The safe and stable operation of mine - used high - voltage power distribution devices plays a crucial guarantee, support, and promotion role in coal mine safety production. How to improve the operation reliability of power distribution devices and perform maintenance before accidents occur is the key to preventing accidents.

[0003] Chinese Patent with Publication No. CN210468386U discloses a mine - used high - voltage vacuum power distribution device with a grounding knife switch, including a power distribution box body, an insulating base, and a movable mounting plate. The insulating base is fixedly installed at the bottom of the power distribution box body. One side of the outer wall of the power distribution box body is provided with a grounding switch. One side of the outer wall of the grounding switch is provided with a closing groove body, and the inner side wall of the closing groove body is provided with a static contact. One side of the movable mounting plate facing the grounding switch is provided with a knife switch linkage rod, and the extending end of the knife switch linkage rod into the closing groove body is provided with a moving contact. On both sides of the knife switch linkage rod on the side wall of the movable mounting plate, a limiting rod and a reciprocating threaded rod are horizontally inserted respectively. The extending end of the reciprocating threaded rod to the outer wall of the power distribution box body is provided with a limiting block. The utility model overcomes the deficiencies of the prior art, is reasonably designed, can achieve the tight closing of the grounding switch, avoid the rebound phenomenon, improve the electrical safety, and has high social use value and application prospects.

[0004] However, the above - mentioned technical solution has the following deficiencies: The exposed contacts are exposed to the air, it is difficult to manually control the contact time, the moving contact time is long, the spark retention time is long, the spark is large, the arc - extinguishing time is long, the service life is short, and there are relatively large potential safety hazards. Summary of the Invention

[0005] The purpose of the present invention is to address the problems in the background art and propose a mine - used high - voltage vacuum power distribution device with a three - position vacuum arc - extinguishing grounding switch.

[0006] The technical solution of the present invention: A mine - used high - voltage vacuum power distribution device with a three - position vacuum arc - extinguishing grounding switch, including:

[0007] A mounting frame, on the top of which there are three groups of mounting shells;

[0008] Three groups of plum - blossom contacts, which are provided in one - to - one correspondence with the mounting shells, the plum - blossom contacts are arranged in the mounting shells, one side of the plum - blossom contact is connected with an incoming - line joint, and one end of the incoming - line joint extends to the outside of the mounting shell;

[0009] There are three sets of conductive bands, which correspond to the mounting cases one by one, and the conductive bands are arranged inside the mounting cases;

[0010] There are three sets of vacuum tubes, which correspond to the conductive bands one by one. The vacuum tubes are arranged inside the mounting cases. One end of the vacuum tube is connected to the conductive band, and the other end of the vacuum tube is connected with an outgoing wire joint, and the outgoing wire joint extends to the outside of the mounting case;

[0011] There are three sets of adjusting mechanisms, which correspond to the conductive bands one by one, and the adjusting mechanisms are connected to the conductive bands;

[0012] The driving mechanism is arranged inside the mounting frame, and the output end of the driving mechanism is in transmission connection with the adjusting mechanism to drive the adjusting mechanism to act.

[0013] Preferably, each set of adjusting mechanisms includes a threaded rod, a nut, a guide sleeve and a movable contact; the threaded rod is rotatably arranged inside the mounting case, the nut is sleeved on the surface of the threaded rod and is threadedly connected with the threaded rod, the movable contact is sleeved on the surface of the nut and is fixedly connected with the nut, the movable contact is connected with the conductive band, the guide sleeve is fixedly arranged inside the mounting case, the movable contact is slidably connected with the inner wall of the guide sleeve, and a guide hole is formed through the surface of the guide sleeve to guide the movement of the movable contact.

[0014] Preferably, the movable contact includes a conductive cylinder and a connecting block; the conductive cylinder is fixedly connected with the nut, the conductive cylinder is slidably arranged inside the guide sleeve, one end of the connecting block is fixedly connected with the conductive cylinder, the other end of the connecting block is connected with the conductive band, and the connecting block passes through the guide sleeve through the guide hole.

[0015] Preferably, the driving mechanism includes a driving shaft, an adjusting handwheel, a transmission component and a driving component; the driving shaft is rotatably arranged inside the mounting frame, one end of the driving shaft penetrates through the mounting frame and extends to the outside of the mounting frame, the adjusting handwheel is arranged outside the mounting frame, the adjusting handwheel is fixedly connected with the driving shaft, there are three sets of transmission components which correspond to the adjusting mechanisms one by one, one end of the transmission component is connected with the adjusting mechanism, the other end of the transmission component is connected with the driving shaft, the driving component is arranged inside the mounting frame, and the output end of the driving component is connected with the driving shaft.

[0016] Preferably, the transmission component includes a first bevel gear and a second bevel gear; the first bevel gear is fixedly connected with the threaded rod, the second bevel gear is fixedly connected with the driving shaft, and the first bevel gear and the second bevel gear are meshed with each other.

[0017] Preferably, the driving component includes a driving motor, a driving rod, a driving wheel and a driven wheel; the driving motor is fixedly arranged inside the mounting frame, the driving rod is fixedly connected with the output end of the driving motor, the driving wheel is fixedly connected with the driving rod, the driven wheel is fixedly connected with the driving shaft, and the driving wheel and the driven wheel are meshed with each other.

[0018] Preferably, a grounding terminal base is fixedly connected inside each mounting shell. The grounding terminal base penetrates through the mounting shell and the mounting bracket and extends into the mounting bracket. The grounding terminal base is sleeved outside the threaded rod.

[0019] Preferably, an insulating pull rod is arranged inside each mounting shell. One end of the insulating pull rod is connected to the conductive belt.

[0020] Compared with the prior art, the above technical solution of the present invention has the following beneficial technical effects:

[0021] In the present invention, by controlling the closing of the vacuum circuit breaker, the load end is grounded through the three-phase vacuum tube arc extinguishing chamber, and the grounding arc light is introduced into the vacuum tube for arc extinguishing, completely solving a series of safety hazards caused by the difficulty of manually controlling the contact time of the contact, long moving contact time, long spark retention time, large spark, and long arc extinguishing time. If the equipment is overhauled, the movable contact is operated to move leftward along the threaded rod to be connected to the grounding end of the circuit breaker. In this position, the circuit breaker is operated to close, so that one end of the vacuum tube of the circuit breaker is connected to the load, and the other end of the vacuum tube is connected to the grounding end. The load end of the equipment is grounded, ensuring the safety of the equipment load end during overhaul. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a perspective view of an embodiment proposed by the present invention;

[0023] Figure 2 is a cross-sectional view of an embodiment proposed by the present invention;

[0024] Figure 3 is a cross-sectional view of the movable contact in an embodiment proposed by the present invention;

[0025] Figure 4 is a schematic structural diagram of the guide sleeve in an embodiment proposed by the present invention;

[0026] Figure 5 is a cross-sectional view of the grounding terminal base in an embodiment proposed by the present invention;

[0027] Figure 6 is a schematic structural diagram of the driving mechanism in an embodiment proposed by the present invention;

[0028] Figure 7 is a schematic diagram of the operating station in an embodiment proposed by the present invention;

[0029] Figure 8 is a schematic diagram of the isolation station in an embodiment proposed by the present invention;

[0030] Figure 9 is a schematic diagram of the grounding station in an embodiment proposed by the present invention.

[0031] Reference numerals: 1, mounting bracket; 2, mounting housing; 31, threaded rod; 32, nut; 331, conductive cylinder; 332, connecting block; 34, guide sleeve; 35, guide hole; 41, drive shaft; 42, adjusting handwheel; 431, first bevel gear; 432, second bevel gear; 441, drive motor; 442, drive rod; 443, driving wheel; 444, driven wheel; 5, plum blossom contact; 6, incoming line connector; 7, conductive strip; 8, vacuum tube; 9, outgoing line connector; 10, grounding terminal block; 11, insulating pull rod. Detailed implementation manners

[0032] Example 1, as Figures 1-6 shown, a mine-used high-voltage vacuum distribution device with a three-station vacuum arc extinguishing grounding switch proposed by the present invention includes a mounting bracket 1, a plum blossom contact 5, a conductive strip 7, a vacuum tube 8, an adjusting mechanism and a driving mechanism;

[0033] Three groups of mounting housings 2 are arranged at the top of the mounting bracket 1;

[0034] Three groups of plum blossom contacts 5 are provided and correspond to the mounting housings 2 one by one. The plum blossom contacts 5 are arranged in the mounting housings 2. One side of the plum blossom contact 5 is connected with an incoming line connector 6, and one end of the incoming line connector 6 extends to the outside of the mounting housing 2;

[0035] Three groups of conductive strips 7 are provided and correspond to the mounting housings 2 one by one. The conductive strips 7 are arranged in the mounting housings 2. An insulating pull rod 11 is arranged in each mounting housing 2, and one end of the insulating pull rod 11 is connected with the conductive strip 7;

[0036] Three groups of vacuum tubes 8 are provided and correspond to the conductive strips 7 one by one. The vacuum tubes 8 are arranged in the mounting housings 2. One end of the vacuum tube 8 is connected with the conductive strip 7, and the other end of the vacuum tube 8 is connected with an outgoing line connector 9, and the outgoing line connector 9 extends to the outside of the mounting housing 2;

[0037] Three groups of adjusting mechanisms are provided and correspond to the conductive strips 7 one by one. The adjusting mechanism is connected with the conductive strip 7;

[0038] The driving mechanism is arranged in the mounting bracket 1, and the output end of the driving mechanism is in transmission connection with the adjusting mechanism to drive the adjusting mechanism to act.

[0039] Example 2, as Figures 2-4As shown in the figure, a mine-used high-voltage vacuum distribution device with a three-position grounding switch with vacuum arc extinguishing proposed by the present invention, compared with Embodiment 1, this embodiment also specifically discloses the structure of the adjusting mechanism; each group of adjusting mechanisms includes a threaded rod 31, a nut 32, a guide sleeve 34 and a moving contact; the threaded rod 31 is rotatably arranged in the mounting shell 2, and a grounding terminal seat 10 is fixedly connected in each mounting shell 2. The grounding terminal seat 10 penetrates through the mounting shell 2 and the mounting frame 1 and extends into the mounting frame 1. The grounding terminal seat 10 is sleeved outside the threaded rod 31. The nut 32 is sleeved on the surface of the threaded rod 31 and is threadedly connected with the threaded rod 31. The moving contact is sleeved on the surface of the nut 32 and is fixedly connected with the nut 32. The moving contact is connected with the conductive strip 7. The guide sleeve 34 is fixedly arranged in the mounting shell 2. The moving contact is slidably connected with the inner wall of the guide sleeve 34. A guide hole 35 is formed through the surface of the guide sleeve 34 for guiding the movement of the moving contact. The moving contact includes a conductive cylinder 331 and a connecting block 332; the conductive cylinder 331 is fixedly connected with the nut 32. The conductive cylinder 331 is slidably arranged in the guide sleeve 34. One end of the connecting block 332 is fixedly connected with the conductive cylinder 331. The other end of the connecting block 332 is connected with the conductive strip 7. The connecting block 332 penetrates through the guide sleeve 34 through the guide hole 35.

[0040] Embodiment 3, as Figure 6 As shown in the figure, a mine-used high-voltage vacuum distribution device with a three-position grounding switch with vacuum arc extinguishing proposed by the present invention, compared with Embodiment 2, this embodiment also specifically discloses the structure of the driving mechanism; the driving mechanism includes a driving shaft 41, an adjusting handwheel 42, a transmission component and a driving component; the driving shaft 41 is rotatably arranged in the mounting frame 1. One end of the driving shaft 41 penetrates through the mounting frame 1 and extends to the outside of the mounting frame 1. The adjusting handwheel 42 is arranged outside the mounting frame 1. The adjusting handwheel 42 is fixedly connected with the driving shaft 41. Three groups of transmission components are provided and correspond to the adjusting mechanisms one by one. One end of the transmission component is connected with the adjusting mechanism, and the other end of the transmission component is connected with the driving shaft 41. The driving component is arranged in the mounting frame 1. The output end of the driving component is connected with the driving shaft 41.

[0041] Embodiment 4, as Figure 6 As shown in the figure, a mine-used high-voltage vacuum distribution device with a three-position grounding switch with vacuum arc extinguishing proposed by the present invention, compared with Embodiment 3, this embodiment also specifically discloses the structure of the transmission component; the transmission component includes a first bevel gear 431 and a second bevel gear 432; the first bevel gear 431 is fixedly connected with the threaded rod 31, the second bevel gear 432 is fixedly connected with the driving shaft 41, and the first bevel gear 431 meshes with the second bevel gear 432.

[0042] Embodiment 5, as Figure 6As shown in the figure, a mine-used high-voltage vacuum distribution device with a three-station vacuum arc-extinguishing earthing switch proposed by the present invention specifically discloses the structure of the driving assembly compared with Embodiment 4; the driving assembly includes a driving motor 441, a driving rod 442, a driving wheel 443 and a driven wheel 444; the driving motor 441 is fixedly arranged in the mounting frame 1, the driving motor 441 has the function of forward and reverse rotation, is connected to the control system and the power supply through wires, the driving rod 442 is fixedly connected to the output end of the driving motor 441, the driving wheel 443 is fixedly connected to the driving rod 442, the driven wheel 444 is fixedly connected to the driving shaft 41, and the driving wheel 443 and the driven wheel 444 are meshed with each other.

[0043] During electric operation, the driving motor 441 works to drive the driving wheel 443 to rotate through the driving rod 442. The driving wheel 443 rotates to drive the driven wheel 444, the driving shaft 41 and the second bevel gear 432 to rotate together through meshing. The second bevel gear 432 rotates to drive the first bevel gear 431 and the threaded rod 31 to rotate together through meshing. The threaded rod 31 rotates to drive the movable contact to move through the nut 32 to change the operating state. During manual operation, the adjusting handwheel 42 is rotated to drive the driving shaft 41 and the second bevel gear 432 to rotate together, and then the movable contact is driven to move through the first bevel gear 431, the threaded rod 31 and the nut 32.

[0044] The circuit breaker has three working positions: the common running position, the isolation position and the (load) earthing position. All three positions have the functions of electric operation and manual operation;

[0045] Working state of the running position:

[0046] As shown in Figure 7, operate the conductive cylinder 331 to close, that is, move to the right end of the threaded rod 31 to be connected to the incoming line joint 6, and then operate the vacuum tube 8 below to close. The device connects to the outgoing line joint 9, and the device closes and runs. Operate the conductive cylinder 331 to close, that is, move to the right end of the threaded rod 31 to be connected to the incoming line joint 6. In the state where the vacuum tube 8 is closed and running, then operate the vacuum tube 8 to open, disconnect the outgoing line joint 9, and the device opens and standby.

[0047] Working state of the isolation position:

[0048] As Figure 8 shown, on the premise that the device is open and standby, operate the conductive cylinder 331 to move to the left of the threaded rod 31 to the middle position of the threaded rod 31. The conductive cylinder 331 keeps a distance from both the right incoming line joint 6 and the left earthing terminal seat 10, leaving a safety break gap to ensure the safety distance of the equipment in the isolation position.

[0049] Working state of the earthing position:

[0050] As Figure 9As shown in the figure, on the premise of operating the circuit breaker to trip, operate the conductive cylinder 331 to continue moving leftward along the threaded rod 31, moving from the middle position of the threaded rod 31 to the leftmost end of the threaded rod 31, and connecting it to the grounding terminal seat 10 of the circuit breaker. At this position, operate the circuit breaker to close, so that one end of the vacuum tube 8 of the circuit breaker is connected to the load, and the other end of the vacuum tube 8 is connected to the grounding terminal seat 10 (grounding position). The grounding of the load end of the device is realized to ensure the safety of the maintenance of the load end of the device.

[0051] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto, and various changes can be made without departing from the spirit of the present invention within the scope of knowledge possessed by those skilled in the art.

Claims

1. A three-station high-voltage vacuum power distribution device for mining with a vacuum arc-extinguishing grounding switch, characterized in that: include: A mounting frame (1) having three sets of mounting shells (2) arranged on the top; The plum blossom contacts (5) are provided in three groups and correspond one to one with the mounting shell (2); the plum blossom contacts (5) are provided in the mounting shell (2); one side of the plum blossom contacts (5) is connected to an incoming line connector (6); one end of the incoming line connector (6) extends to the outside of the mounting shell (2); Conductive strips (7), which are provided in three groups and correspond one to one with the mounting shells (2), and the conductive strips (7) are arranged in the mounting shell (2); The vacuum tubes (8) are provided in three groups and correspond one to one with the conductive strips (7). The vacuum tubes (8) are provided in the installation shell (2). One end of the vacuum tubes (8) is connected to the conductive strip (7). The other end of the vacuum tubes (8) is connected to an outlet connector (9). The outlet connector (9) extends to the outside of the installation shell (2). An adjustment mechanism, which is provided in three groups and corresponds one to one with the conductive belt (7), and the adjustment mechanism is connected to the conductive belt (7); The driving mechanism is arranged in the mounting frame (1); the output end of the driving mechanism is in transmission connection with the adjusting mechanism for driving the adjusting mechanism to move.

2. A three-station high-voltage vacuum power distribution device for mining with a vacuum arc-extinguishing grounding switch according to claim 1, characterized in that: Each group of adjustment mechanisms comprises a threaded rod (31), a nut (32), a guide sleeve (34) and a movable contact; the threaded rod (31) is rotatably arranged in the mounting shell (2); the nut (32) is sleeved on the surface of the threaded rod (31) and is threadedly connected to the threaded rod (31); the movable contact is sleeved on the surface of the nut (32) and is fixedly connected to the nut (32); the movable contact is connected to the conductive belt (7); the guide sleeve (34) is fixedly arranged in the mounting shell (2); the movable contact is slidably connected to the inner wall of the guide sleeve (34); and a guide hole (35) is provided through the surface of the guide sleeve (34) for guiding the movement of the movable contact.

3. A three-station high-voltage vacuum power distribution device for mining with a vacuum arc-extinguishing grounding switch according to claim 1, characterized in that: The movable contact comprises a conductive tube (331) and a connecting block (332); the conductive tube (331) is fixedly connected to the nut (32), the conductive tube (331) is slidably arranged in the guide sleeve (34), one end of the connecting block (332) is fixedly connected to the conductive tube (331), the other end of the connecting block (332) is connected to the conductive belt (7), and the connecting block (332) passes through the guide sleeve (34) through the guide hole (35).

4. A three-station high-voltage vacuum power distribution device for mining with a vacuum arc-extinguishing grounding switch according to claim 2, characterized in that: The driving mechanism comprises a driving shaft (41), an adjusting hand wheel (42), a transmission assembly and a driving assembly; the driving shaft (41) is rotatably arranged in the mounting frame (1), one end of the driving shaft (41) passes through the mounting frame (1) and extends to the outside of the mounting frame (1), the adjusting hand wheel (42) is arranged outside the mounting frame (1), the adjusting hand wheel (42) is fixedly connected to the driving shaft (41), three groups of transmission assemblies are arranged and correspond to the adjusting mechanism one by one, one end of the transmission assembly is connected to the adjusting mechanism, the other end of the transmission assembly is connected to the driving shaft (41), the driving assembly is arranged in the mounting frame (1), and the output end of the driving assembly is connected to the driving shaft (41).

5. A three-station high-voltage vacuum power distribution device for mining with a vacuum arc-extinguishing grounding switch according to claim 4, characterized in that: The transmission assembly comprises a first bevel gear (431) and a second bevel gear (432); the first bevel gear (431) is fixedly connected to the threaded rod (31), the second bevel gear (432) is fixedly connected to the driving shaft (41), and the first bevel gear (431) and the second bevel gear (432) are meshed with each other.

6. A three-station high-voltage vacuum power distribution device for mining with a vacuum arc-extinguishing grounding switch according to claim 4, characterized in that: The driving assembly comprises a driving motor (441), a driving rod (442), a driving wheel (443) and a driven wheel (444); the driving motor (441) is fixedly arranged in the mounting frame (1); the driving rod (442) is fixedly connected to the output end of the driving motor (441); the driving wheel (443) is fixedly connected to the driving rod (442); the driven wheel (444) is fixedly connected to the driving shaft (41); and the driving wheel (443) and the driven wheel (444) are meshed with each other.

7. A three-station high-voltage vacuum power distribution device for mining with a vacuum arc-extinguishing grounding switch according to claim 2, characterized in that: A grounding terminal seat (10) is fixedly connected inside each group of mounting shells (2); the grounding terminal seat (10) penetrates the mounting shell (2) and the mounting frame (1) and extends into the mounting frame (1); the grounding terminal seat (10) is sleeved on the outside of the threaded rod (31).

8. A three-station high-voltage vacuum power distribution device for mining with a vacuum arc-extinguishing grounding switch according to claim 1, characterized in that: An insulating pull rod (11) is arranged in each group of mounting shells (2), and one end of the insulating pull rod (11) is connected to the conductive belt (7).

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