A quick-release electric phase-changing combination switch and operation method

Abstract

This patent discloses a quick-release electric phase-changing combination switch and an operating method. The mechanism includes an outer box assembly, an inner box assembly, a main shaft assembly, a pulley assembly, an electric phase-changing device assembly, a transformer box, an isolation plate motion assembly, a back plate assembly, a moving contact assembly, etc. The present invention activates the mechanism by turning the hand crank, thereby first disconnecting the weak current control system of the electric phase-changing device assembly, then disconnecting the high-voltage main power of the electric phase-changing device assembly, and finally lifting the isolation plate to block the high-voltage back plate jack of the electric phase-changing device back plate without opening the explosion-proof door. After completing these three actions, the explosion-proof door can be safely opened and the electric phase-changing device assembly can be taken out for inspection or replacement. The present invention can improve the overall safety of the switch, reduce labor intensity, and improve efficiency.

Description

Technical Field

[0001] The invention relates to the field of underground coal mine combined switches, in particular to a quick-detachable electric phase-changing explosion-proof switch and an operating method. Background Art

[0002] In the mine, the electric phase-changing combination switch, as the main control mechanism for controlling conveyors, transfer machines, and hydraulic pump stations, must be reliable and durable. Its core component, the electric phase-changing module, must withstand high voltage, high current, and frequent start-stop conditions, and is easily damaged. It needs to be regularly removed from the electric explosion-proof switch box for maintenance. Since the rear of the vacuum contactor is connected to high voltage electricity, before opening the door each time, it is necessary to first power off the switch at this level, then power off the upper circuit, and after opening the door, remove the fixing bolts, and finally pull out the entire vacuum contactor module from the box assembly. Such a design has the disadvantages of complex operation, long replacement time, difficulty in pulling out the contactor, and the need to disconnect the upper circuit. Therefore, a new type of electric phase-changing combination switch that can disconnect the weak current module inside the box without disconnecting the upper power supply before opening the box door, and through the operation outside the box, can be used to disconnect the vacuum contactor module from the back panel, and use insulating materials to block the high-voltage socket of the back panel to achieve absolute safety has become the focus and difficulty of the design. Summary of the invention

[0003] In view of this, the present invention proposes a quick-release electric phase-changing combination switch.

[0004] Furthermore, the mechanism can drive several mechanisms inside the box to operate sequentially by rotating a handle outside the box.

[0005] Furthermore, the switch can disconnect the weak current module first, then the vacuum contactor module is separated from the back plate, and finally the insulating material blocks the high voltage socket of the back plate to achieve absolute safety. This new design greatly reduces the time and complexity of disassembling and assembling the electric phase-changing module.

[0006] The objective of the present invention is achieved through the following technical solutions:

[0007] On the one hand, the mechanism is composed of an outer box assembly, an inner box assembly, a main shaft assembly, a pulley assembly, an electric phase converter assembly, a transformer box, an isolation plate moving assembly, a back plate assembly, and a moving contact assembly.

[0008] The outer box assembly consists of an outer box, four 4mm lead screws, two sprockets, two inert sprocket chains, an explosion-proof quick-opening door, a rear door, an explosion-proof terminal, etc. The 4mm lead screw is fixed to the inside of the outer box through a screw base and can rotate. The sprocket and the 4mm lead screw are fixed by a flat key; the chain connects several related parts to move.

[0009] Furthermore, the inner box assembly is composed of an inner box, a large track plate, front and rear sliding shafts, rolling bearings, a front limit rod, a rear limit rod, and an upper and lower sliding shaft. Three oblong holes are cut on the large track plate by laser, namely track one, track two, and track three. The inner box is fixed inside the outer box by bolts.

[0010] Furthermore, the spindle assembly is composed of a 10 mm lead screw, a handle, and a sprocket. The three are fixed together with the 10 mm lead screw through a flat key. The spindle assembly is inserted into the outer box body through a bearing and can rotate.

[0011] Furthermore, the pulley assembly is composed of two 10mm lead screw nuts, an upper connecting plate, a lower connecting plate, four sliding bearings A, and two small track plates. The small track plate is cut with two special-shaped oblong holes by laser, track four and track five respectively. The 10mm lead screw nut is fixed to the upper connecting plate. The lower connecting plate, the sliding bearing A, and the small track plate are welded together and fixed to the upper connecting plate by bolts. The pulley assembly is installed on the front and rear sliding shafts of the inner box assembly through sliding bearings, and the 10mm lead screw drives the 10mm lead screw nut to slide forward and backward.

[0012] Furthermore, the electric phase changer assembly is composed of an electric phase change module and a static contact. There are six high-voltage main terminals at the rear of the electric phase change module.

[0013] Furthermore, the transformer assembly is composed of a transformer box and a transformer static contact. There are three high-voltage main terminals at the rear of the transformer box.

[0014] Furthermore, the isolation plate motion assembly is composed of a lifting frame, bakelite, a lifting shaft, an upper bearing, and a lower bearing. The lifting frame and bakelite are bonded together. The upper bearing and the lifting shaft are inserted into the second track and the fifth track, and the lower bearing is inserted into the third track. The isolation plate motion assembly can be moved up and down by moving the pulley assembly forward and backward.

[0015] Furthermore, the backplane assembly is composed of three sets of electric commutator backplanes, upper and lower beams, isolation plates, and four sets of 4mm lead screw nuts. Each electric commutator backplane has six backplane jacks, which are connected to high voltage electricity, three holes for power input, and three holes for power output. The upper and lower beams fix the three sets of electric commutator backplanes and four sets of ball nuts together, the bakelite is inserted into the groove of the isolation plate, and the isolation plate is inserted into the long hole of the electric commutator backplane. As the isolation backplane motion assembly moves up and down, the isolation plate can move up and down in the groove of the electric commutator backplane.

[0016] Furthermore, the moving contact assembly is composed of a moving contact holder, three sets of moving contacts, a transverse shaft and two sets of sliding bearings B. The sliding bearings B can slide on the upper and lower sliding shafts, and the transverse shaft is inserted into the track 1 and the track 4. Under normal working conditions, the moving contact is pressed against the corresponding static contact, and due to the action of the spring, it is pressed in 3mm. As the pulley assembly moves backward, the moving contact assembly can move upward 15mm.

[0017] Furthermore, two sets of electric inverter assemblies and one set of transformer assemblies are fixed in the inner box through front limit rods and rear limit rods. When the power is normally supplied, the high-voltage main terminal is inserted 12 mm into the back panel socket. When the power is cut off for inspection, the back panel assembly moves horizontally to the rear of the box, and the high-voltage main terminal is pulled out from the back panel socket.

[0018] Furthermore, the bakelite is inserted into the long hole of the isolation plate to be lifted, and after lifting, the sockets on the isolation plate and the sockets on the back plate are staggered to isolate the high voltage electricity.

[0019] Furthermore, when the spindle assembly moves from 0.5 turns to 3 turns, the moving contact assembly moves upward at a uniform speed of 15 mm; when the spindle assembly moves from 0 turns to 12 turns, the back plate assembly moves backward at a uniform speed of 48 mm; when the spindle assembly moves from 9 turns to 12 turns, the isolation plate moving assembly moves upward at a uniform speed of 20 mm; when the spindle assembly moves from 0 turns to 12 turns, the isolation plate moves backward at a uniform speed of 48 mm, and when the spindle assembly moves from 9 turns to 12 turns, it moves upward at a uniform speed of 20 mm.

[0020] Furthermore, the method of using the switch is as follows:

[0021] 1. Rotate the handle counterclockwise from 0 to 0.5 turns. The pulley assembly moves backward 5mm under the action of the 10mm lead screw. The sprocket drives the four 4mm lead screws to rotate clockwise through the chain, and the back plate assembly moves backward 2mm.

[0022] 2. Continue to rotate the handle counterclockwise. During the process from 0.5 to 3 circles, the pulley assembly moves backward from 5mm to 30mm. Track 1, Track 4 and the horizontal axis interact with each other, and the moving contact assembly is evenly lifted by 15mm. At the end of the first circle, the moving contact is lifted from 0 to 3mm to complete the separation from the static contact. At the end of the third circle, it is lifted to 15mm. At this time, the distance between the moving contact and the static contact reaches 12mm, and it no longer moves in the subsequent process. The backplane assembly continues to move backward. At the end of the third circle, it moves to 12mm. At this time, the high-voltage main terminal and the backplane jack are just separated, and the high-voltage main power is disconnected.

[0023] 3. Continue to rotate the handle counterclockwise. From 3 to 9 circles, the pulley assembly moves backward from 30mm to 90mm. The back plate assembly continues to move backward. At the end of the 9th circle, it moves to 36mm. At this time, the distance between the high-voltage main terminal and the back plate jack is 24mm. The isolation plate can now move upward.

[0024] 4. Continue to rotate the handle counterclockwise. From 9 to 12 circles, the pulley assembly moves backward from 90mm to 120mm. The isolation plate moving assembly moves upward 20mm under the joint action of the upper bearing, track 5, lower bearing, track 2, and track 3. The back plate assembly continues to move backward, and at the end of the 12th circle, it moves to 48mm. Under the joint action of the bakelite and back plate assembly, the isolation plate is lifted up 20mm and moves backward 12mm. At this time, the isolation plate blocks the back plate jack and isolates the high voltage electricity.

[0025] 5. Open the explosion-proof quick-opening door.

[0026] 6. Move the front limit rod downward to remove it.

[0027] 7. Pull out the electric commutator assembly.

[0028] The beneficial effects of the present invention are mainly manifested in:

[0029] 1. The overall action is highly coherent and automated, and all functions can be completed by operating the handle only.

[0030] 2. During the operation, the vacuum contactor module is replaced by disassembling the bolts, which is improved to repair and replace without using any tools.

[0031] 3. After the main terminals and backplane jacks of the electric commutation module and transformer assembly are separated, the isolation plate is lifted to completely isolate the high voltage electricity. Without turning off the upper circuit breaker, it can also be opened and operated safely. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The accompanying drawings constituting the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0033] Figure 1 3D general view of the equipment (external cut in half)

[0034] Figure 2 Outer box assembly (outer half cut)

[0035] Figure 3 Equipment overview

[0036] Figure 4 Inner box components

[0037] Figure 5 Spindle assembly and pulley assembly

[0038] Figure 6 Electric inverter components and transformer box

[0039] Figure 7 Isolation plate motion assembly and back plate assembly

[0040] Figure 8 Moving contact assembly

[0041] Fig. 9 The overall organization is in normal working condition

[0042] Fig.10 Overall mechanism disconnection status

[0043] In the figure: 10, outer box assembly, 11, outer box, 12, 4mm lead screw, 13, sprocket, 14, inert sprocket, 15, chain, 16, explosion-proof quick-opening door, 17, rear door, 18, explosion-proof terminal;

[0044] 20. Inner box assembly, 21. Inner box, 22. Large track plate, 23. Front and rear sliding shafts, 24. Rolling bearing, 25. Front limit rod, 26. Rear limit rod, 27. Track 1, 28. Track 2, 29. Track 3, 210. Up and down sliding shafts;

[0045] 30. Spindle assembly, 31. 10mm lead screw, 32. Handle, 33. Spindle sprocket;

[0046] 40. Pulley assembly, 41. 10 mm lead screw nut, 42. Upper connecting plate, 43. Lower connecting plate, 44. Sliding bearing A, 45. Small track plate, 46. Track four, 47. Track five;

[0047] 50. electric commutator assembly, 51. electric commutation module, 52. static contact, 53. high-voltage main terminal;

[0048] 60. Transformer assembly, 61. Transformer housing, 62. Transformer static contact, 63. Transformer main terminal;

[0049] 70. Isolation plate movement assembly, 71. Lifting frame, 72. Bakelite, 73. Lifting shaft, 74. Upper bearing, 75. Lower bearing;

[0050] 80. Back panel assembly;

[0051] 81. Electric commutator back plate, 82. Upper and lower beams, 83. Isolation plate, 84. 4mm lead screw nut, 85. Back plate jack;

[0052] 90. Moving contact assembly;

[0053] 91. Moving contact holder, 92. Moving contact, 93. Horizontal axis, 94. Sliding bearing B. DETAILED DESCRIPTION

[0054] The technical solutions in the embodiments of the present invention are described completely and clearly below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, but not all of them.

[0055] like Figures 1 to 10 As shown, a specific implementation of a quick-plug fixing mechanism for a vacuum contactor module is as follows:

[0056] Normal working status:

[0057] 1 The moving contact 92 and the stationary contact 52 are pressed tightly and energized;

[0058] 2. Insert the high voltage main terminal 53 and the transformer main terminal 63 into the back panel jack 85 and turn on the power;

[0059] The process of disconnecting weak current and strong current and pulling out the electric commutator by the electric reversing combination switch:

[0060] 1. Rotate the handle 32 counterclockwise from 0 to 0.5 turns. The pulley assembly 40 moves backward 5 mm under the action of the 10 mm lead screw 31. The main shaft sprocket 33 drives the four 4 mm lead screws 12 to rotate clockwise through the chain 15, and the back plate assembly 80 moves backward 2 mm;

[0061] 2. Continue to rotate the handle 32 counterclockwise, from 0.5 circles to 3 circles, the pulley assembly 40 moves backward from 5mm to 30mm, the track 1 27, the track 4 46 and the horizontal axis 93 interact with each other, and the moving contact assembly 90 is evenly lifted by 15mm. At the end of the first circle, the moving contact 92 is lifted from 0 to 3mm, and the separation from the static contact 52 is completed. At the end of the third circle, it is lifted to 15mm. At this time, the distance between the moving contact 92 and the static contact 52 reaches 12mm, and it no longer moves in the subsequent process. The backplane assembly 80 continues to move backward, and at the end of the third circle, it moves to 12mm. At this time, the high-voltage main terminal 53, the transformer main terminal 63 and the backplane jack 85 are just separated, and the high-voltage main power is disconnected;

[0062] 3. Continue to rotate the handle 32 counterclockwise. During the process of 3 to 9 circles, the pulley assembly 40 moves backward from 30 mm to 90 mm. The back plate assembly 80 continues to move backward. At the end of the 9th circle, it moves to 36 mm. At this time, the distance between the high-voltage main terminal 53, the transformer main terminal 63 and the back plate jack 85 is 24 mm. The isolation plate 83 can move upward at this time;

[0063] 4. Continue to rotate the handle 32 counterclockwise, from 9 to 12 circles, the pulley assembly 40 moves backward from 90mm to 120mm. The isolation plate moving assembly 70 moves upward 20mm under the joint action of the upper bearing 74, the track five 47, the lower bearing 75, the track two 28 and the track three 29. The back plate assembly 80 continues to move backward, and at the end of the 12th circle, it moves to 48mm. Under the joint action of the bakelite 72 and the back plate assembly 80, the isolation plate 83 is lifted upward 20mm and moves backward 12mm. At this time, the isolation plate 83 blocks the back plate jack 85 to isolate the high voltage electricity;

[0064] 5. Open the explosion-proof quick-opening door 16;

[0065] 6. Move the front limit rod 25 downward to remove it;

[0066] 7. Pull out the electric inverter assembly 50.

[0067] It should be understood that the detailed description of the technical solution of the present invention by means of the preferred embodiments is illustrative rather than restrictive. A person skilled in the art may modify the technical solution described in the embodiments based on reading the specification of the present invention, or replace some of the technical features therein by equivalents, and these modifications or replacements do not make the essence of the corresponding technical solution deviate from the spirit and scope of the technical solution of the embodiment of the present invention.

Claims

1. A quick-release electric reversing combination switch, characterized in that: It is composed of an outer box assembly (10), an inner box assembly (20), a main shaft assembly (30), a pulley assembly (40), an electric commutator assembly (50), a transformer assembly (60), an isolation plate moving assembly (70), a back plate assembly (80), and a moving contact assembly (90); The outer box assembly (10) is composed of an outer box (11), four 4 mm lead screws (12), four sprockets (13), two idler sprockets (14), a chain (15), an explosion-proof quick-opening door (16), a rear door (17), and an explosion-proof terminal (18); the 4 mm lead screw (12) is rotatably fixed inside the outer box via a screw base, and the sprocket (13) and the 4 mm lead screw (12) are fixed via a flat key; the chain (15) connects several related components for movement; The inner box assembly (20) is composed of an inner box (21), a large track plate (22), front and rear sliding shafts (23), rolling bearings (24), a front limit rod (25), a rear limit rod (26), and an upper and lower sliding shaft (210); three oblong holes are cut on the large track plate (22) by laser, namely track one (27), track two (28), and track three (29); the inner box (21) is fixed to the inside of the outer box (11) by bolts; The spindle assembly (30) is composed of a 10 mm lead screw (31), a handle (32) and a spindle sprocket (33), which are fixed together with the 10 mm lead screw (31) via a flat key; the spindle assembly (30) is inserted into the outer box (11) via a bearing and is rotatable; The pulley assembly (40) is composed of two 10 mm lead screw nuts (41), an upper connecting plate (42), a lower connecting plate (43), four sliding bearings A (44), and two small track plates (45); the small track plate (45) is provided with two special-shaped oblong holes cut by laser, and track four (46) and track five (47) are provided respectively; the 10 mm lead screw nut (41) is fixed to the upper connecting plate (42); the lower connecting plate (43), the sliding bearing A (44), and the small track plate (45) are welded together, and fixed together with the upper connecting plate (42) by bolts; the pulley assembly (40) is installed on the front and rear sliding shafts (23) of the inner box assembly by means of sliding bearings, and the 10 mm lead screw (31) drives the 10 mm lead screw nut (41) to slide forward and backward; The electric phase converter assembly (50) is composed of an electric phase conversion module (51) and a static contact (52), and the rear of the electric phase conversion module (51) is provided with six high-voltage main terminals (53); The transformer assembly (60) is composed of a transformer box (61) and a transformer static contact (62), and three transformer main terminals (63) are provided at the rear of the transformer box (61); The isolation plate motion assembly (70) is composed of a lifting frame (71), bakelite (72), a lifting shaft (73), an upper bearing (74), and a lower bearing (75). The lifting frame (71) and the bakelite (72) are bonded together. The upper bearing (74) and the lifting shaft (73) are inserted into the track two (28) and the track five (47). The lower bearing (75) is inserted into the track three (29). The isolation plate motion assembly (70) can be moved up and down by moving the pulley assembly (40) forward and backward. The back plate assembly (80) is composed of three sets of electric commutator back plates (81), upper and lower cross beams (82), isolation plates (83), and four sets of 4 mm lead screw nuts (84). Each electric commutator back plate (81) has six back plate jacks (85) for connecting high voltage electricity, three holes for electricity input, and three holes for electricity output. The upper and lower cross beams (82) fix the three sets of electric commutator back plates (81) and the four sets of ball nuts (84) together. The bakelite (72) is inserted into the groove of the isolation plate (83), and the isolation plate (83) is inserted into the long hole of the electric commutator back plate (81). As the isolation back plate motion assembly (70) moves up and down, the isolation plate (83) can move up and down in the groove of the electric commutator back plate (81); The moving contact assembly (90) is composed of a moving contact holder (91), three sets of moving contacts (92), a transverse shaft (93) and two sets of sliding bearings B (94); the sliding bearings B (94) can slide on the upper and lower sliding shafts (210); the transverse shaft (93) is inserted into the track one (27) and the track four (46); under normal working conditions, the moving contact (92) is pressed against the corresponding stationary contact (52) and is pressed in by 3 mm due to the action of the spring; as the pulley assembly (40) moves backward, the moving contact assembly (90) can move upward by 15 mm; The two groups of electric inverter components (50) and one group of transformer components (60) are fixed in the inner box (21) through the front limit rod (25) and the rear limit rod (26). When the power is normally supplied, the high-voltage main terminal (53) and the transformer main terminal (63) are inserted into the back plate plug hole (85) by 12 mm. When the power is turned off for inspection, the back plate component (80) moves horizontally toward the rear of the box, and the high-voltage main terminal (53) and the transformer main terminal (63) are pulled out from the back plate plug hole (85); The bakelite (72) is inserted into the long hole of the isolation plate (83) and lifted. After the lifting, the socket on the isolation plate (83) and the back plate socket (85) are staggered to isolate the high voltage electricity.

2. The method for operating a quick-release electric reversing combination switch according to claim 1, characterized in that: When the spindle assembly (30) rotates from 0.5 to 3 times, the moving contact assembly (90) moves upward at a uniform speed of 15 mm; when the spindle assembly (30) rotates from 0 to 12 times, the back plate assembly (80) moves backward at a uniform speed of 48 mm; when the spindle assembly (30) rotates from 9 to 12 times, the isolation plate moving assembly (70) moves upward at a uniform speed of 20 mm; when the spindle assembly (30) rotates from 0 to 12 times, the isolation plate (83) moves backward at a uniform speed of 48 mm, and when the spindle assembly (30) rotates from 9 to 12 times, it moves upward at a uniform speed of 20 mm; The switch is used as follows:

1. When the handle (32) is rotated counterclockwise from 0 to 0.5 turns, the pulley assembly (40) moves backwards by 5 mm under the action of the 10 mm lead screw (31), the spindle sprocket (33) drives the four 4 mm lead screws (12) to rotate clockwise through the chain (15), and the back plate assembly (80) moves backwards by 2 mm; 2. Continue to rotate the handle (32) counterclockwise, from 0.5 to 3 turns, the pulley assembly (40) moves backward from 5 mm to 30 mm, the track 1 (27), the track 4 (46) and the horizontal axis (93) interact with each other, and the moving contact assembly (90) is evenly lifted by 15 mm; at the end of the first turn, the moving contact (92) is lifted from 0 to 3 mm, and the moving contact (92) is separated from the static contact (52). At the end of the third turn, it is lifted to 15 mm. At this time, the distance between the moving contact (92) and the static contact (52) reaches 12 mm, and it no longer moves in the subsequent process. The back plate assembly (80) continues to move backward. At the end of the third turn, it moves to 12 mm. At this time, the high-voltage main terminal (53), the transformer main terminal (63) and the back plate jack (85) are just separated, and the high-voltage main power is disconnected; 3. Continue to rotate the handle (32) counterclockwise, from 3 to 9 turns, the pulley assembly (40) moves backward from 30 mm to 90 mm; the back plate assembly (80) continues to move backward, and at the end of the 9th turn, it moves to 36 mm, at which time the distance between the high-voltage main terminal (53), the transformer main terminal (63) and the back plate jack (85) is 24 mm, and the isolation plate (83) can now move upward; Fourth, the handle (32) is rotated counterclockwise continuously, from 9 to 12 circles, the pulley assembly (40) moves backward from 90 mm to 120 mm; the isolation plate moving assembly (70) moves upward by 20 mm under the joint action of the upper bearing (74), the track five (47), the lower bearing (75), the track two (28) and the track three (29), and the back plate assembly (80) continues to move backward. At the end of the 12th circle, it moves to 48 mm. The isolation plate (83) is lifted upward by 20 mm and moves backward by 12 mm under the joint action of the bakelite (72) and the back plate assembly (80). At this time, the isolation plate (83) blocks the back plate jack (85) to isolate the high voltage electricity; 5. Open the explosion-proof quick-opening door (16); 6. Move the front limit rod (25) downward to remove it; 7. Pull out the electric commutator assembly (50).

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