An isolated ground mechanism control system

Abstract

The utility model relates to an isolation grounding mechanism control system, wherein the second ground knife stroke switch is equipped on the grounding opening control line in the control circuit, and the sixth branch also controls the on-off through the second ground knife stroke switch; the third ground knife stroke switch and the first isolation stroke switch are equipped on the grounding closing control line in the control circuit, and the fifth branch also controls the on-off through the third ground knife stroke switch; the second isolation stroke switch and the first ground knife stroke switch are equipped on the isolation closing control line in the control circuit, and the eighth branch also controls the on-off through the second isolation stroke switch; the third isolation stroke switch is equipped on the isolation opening control line in the control circuit, and the seventh branch also controls the on-off through the third isolation stroke switch; the relay is equipped on each control line of the control circuit, and the switch controlled through the corresponding relay is equipped on each branch of the branch bus. The utility model can realize the stable control of the mechanism motor positive and negative rotation.

Description

Technical Field

[0001] This utility model relates to the field of power equipment, specifically to a control system for an isolation grounding mechanism. Background Technology

[0002] In power systems, with technological advancements, the automation level of isolation and grounding mechanisms is increasing. Among these, using motor drives to achieve automatic opening and closing of the mechanism is the most common method. However, due to the complexity of the actions of isolation and grounding mechanisms, such as the very strict requirements on the operating sequence of disconnecting switches and grounding switches, the control stability of the motors in existing isolation and grounding mechanisms still needs further improvement. In particular, when only one motor is used to achieve the opening and closing of disconnecting switches and grounding switches through forward and reverse rotation, ensuring the control stability of the forward and reverse rotation of the motor is one of the important issues that need to be considered. Summary of the Invention

[0003] The purpose of this utility model is to provide a control system for an isolation grounding mechanism, which can realize stable forward and reverse rotation control of the motor of the isolation grounding mechanism, thereby enabling safe, efficient and stable electric operation.

[0004] The objective of this utility model is achieved through the following technical solution: A grounding isolation mechanism control system includes a branch bus, a control circuit, a holding circuit, and a motor circuit. The control circuit includes a grounding trip control line, a grounding close control line, a grounding close control line, and a grounding trip control line connected in parallel between the input bus and the output bus. A third relay is provided on the grounding trip control line, a fourth relay is provided on the grounding close control line, a sixth relay is provided on the grounding close control line, and a fifth relay is provided on the grounding trip control line. The branch bus has multiple branches, of which the first branch is connected to the grounding trip control line and is equipped with the third switch one; the second branch is connected to the grounding close control line and is equipped with the fourth switch one; the third branch is connected to the isolation close control line and is equipped with the sixth switch one; the fourth branch is connected to the isolation trip control line and is equipped with the fifth switch one; the fifth branch is connected to the grounding trip control line and is equipped with the third switch two; the sixth branch is connected to the grounding close control line and is equipped with the fourth switch two; the seventh branch is connected to the isolation close control line and is equipped with the sixth switch two; and the eighth branch is connected to the isolation trip control line and is equipped with the fifth switch two. The grounding trip control line is equipped with a second grounding limit switch, and the sixth branch is also controlled to open and close via the second grounding limit switch; the grounding close control line is equipped with a third grounding limit switch and a first isolating limit switch, and the fifth branch is also controlled to open and close via the third grounding limit switch; the isolating close control line is equipped with a second isolating limit switch and a first grounding limit switch, and the eighth branch is also controlled to open and close via the second isolating limit switch; the isolating trip control line is equipped with a third isolating limit switch, and the seventh branch is also controlled to open and close via the third isolating limit switch. The third switch one and the third switch two are controlled by the third relay, the fourth switch one and the fourth switch two are controlled by the fourth relay, the fifth switch one and the fifth switch two are controlled by the fifth relay, and the sixth switch one and the sixth switch two are controlled by the sixth relay. The holding circuit and motor circuit are located between the branch bus and the power output bus, and the power on and off are controlled by the control circuit.

[0005] When the second grounding limit switch on the grounding trip control line is open, the second grounding limit switch on the sixth branch is closed; when the third grounding limit switch on the grounding close control line is open, the third grounding limit switch on the fifth branch is closed; when the second isolation limit switch on the isolation close control line is open, the second isolation limit switch on the eighth branch is closed; when the third isolation limit switch on the isolation trip control line is open, the third isolation limit switch on the seventh branch is closed.

[0006] A second grounding limit switch is provided on the grounding trip control line between the first branch and the fifth branch; a third grounding limit switch is provided on the grounding close control line between the second branch and the sixth branch; a first isolation limit switch is provided on the grounding close control line between the sixth branch and the fourth relay; a second isolation limit switch is provided on the isolation close control line between the third branch and the seventh branch; a first grounding limit switch is provided on the isolation close control line between the seventh branch and the sixth relay; and a third isolation limit switch is provided on the isolation trip control line between the fourth branch and the eighth branch.

[0007] The holding circuit includes a first holding line and a second holding line connected in parallel between the branch bus and the power output bus. The first holding line is provided with a third switch, a second switch, and a first relay in sequence. The second holding line is provided with a fourth switch, a first switch, and a second relay in sequence. The branch bus is provided with a ninth branch and a tenth branch. The ninth branch is provided with a sixth switch, and the tenth branch is provided with a fifth switch. The third switch is controlled by the third relay, the fourth switch is controlled by the fourth relay, the fifth switch is controlled by the fifth relay, and the sixth switch is controlled by the sixth relay.

[0008] The ninth branch is connected to the first holding line between the third switch and the second switch, and the tenth branch is connected to the second holding line between the fourth switch and the first switch.

[0009] The first switch is a normally closed switch and is controlled by a first relay, and the second switch is a normally closed switch and is controlled by a second relay.

[0010] The motor circuit includes a rectifier bridge module, a motor control input line, a motor, a motor control output line, a first branch, and a second branch. The branch bus is connected to one side of the rectifier bridge module, and the other side of the rectifier bridge module is connected to the output bus. One side of the motor is connected to the rectifier bridge module via the motor control input line, and the other side is connected to the output bus via the motor control output line. A second switch two is provided on the motor control input line, and a second switch three is provided on the motor control output line. The motor control input line of the second switch two, located away from the motor, is connected to the motor control output line of the second switch three, located near the motor, via the first branch. A first switch two is provided on the first branch, and the motor control input line of the second switch two, located near the motor, is connected to the motor control output line of the second switch three, located away from the motor, via the second branch. A first switch three is also provided on the second branch. The first switch two and the first switch three are controlled by the first relay; the second switch two and the second switch three are controlled by the second relay.

[0011] A micro switch group is provided between the power input bus and the branch bus. When the grounding trip control line and the grounding closing control line are synchronously connected under the control of the micro switch group, the isolation closing control line and the isolation trip control line are synchronously disconnected under the control of the micro switch group.

[0012] The grounding trip control line has a first button on the side near the power input bus, the grounding close control line has a second button on the side near the power input bus, the isolation close control line has a third button on the side near the power input bus, and the isolation trip control line has a fourth button on the side near the power input bus.

[0013] Both the power input bus and the power output bus are connected to a power source, and the power input bus and the power output bus are controlled to be switched on and off by an air switch.

[0014] The advantages and positive effects of this utility model are as follows: This utility model includes multiple relays and multiple switches that are controlled to open and close by corresponding relays. The relays and switches on each control line and branch line work together with each isolation limit switch, each grounding limit switch and micro switch group to achieve stable control of the motor's forward and reverse rotation, thereby achieving safe, efficient and stable electric operation.

[0015] In the control system of this utility model, the second isolation limit switch, the third isolation limit switch, the second grounding limit switch, and the third grounding limit switch, in addition to controlling the corresponding control lines, can also control the on / off of the corresponding branches on the branch bus. For example, when the second isolation limit switch (i.e., XC3) is open, the isolation closing control line is disconnected, and at the same time, the eighth branch is connected. This ensures that when the isolation is opened, after the fifth relay is energized, the eighth branch can continuously supply power to the fifth relay, thereby ensuring that the motor continues to rotate.

[0016] In the control system of this utility model, when the previous action of the mechanism is completed, the control line of the next action can be automatically connected. For example, when the isolation tripping action is completed, the first isolation limit switch (i.e., XC6) on the grounding closing control line is closed. At the same time, since the grounding output shaft does not rotate because the middle half gear does not mesh with the grounding shaft gear, the third grounding limit switch (i.e., XC1) on the grounding closing control line remains closed. In this way, the operator can directly press the second button (i.e., SA2) to connect the grounding closing control line and then realize the next grounding closing action.

[0017] In the control system of this utility model, a normally closed second switch is provided on the first holding circuit, and a normally closed first switch is provided on the second holding circuit. When the first relay on the first holding circuit is energized, the first switch is opened, thereby disconnecting the second holding circuit. When the second relay on the second holding circuit is energized, the second switch is opened, thereby disconnecting the first holding circuit. This realizes the interlocking function between the holding circuits, which can further ensure the stability of the forward and reverse control of the motor. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model. Figure 2 This is a schematic diagram of the isolation grounding mechanism using this utility model. Figure 3 for Figure 2 A schematic diagram of the gear arrangement inside the central isolation grounding mechanism. Figure 4 for Figure 2 A schematic diagram showing the arrangement of the first isolation limit switch, micro switch group, and first grounding limit switch inside the central isolation grounding mechanism. Figure 5 for Figure 2 A schematic diagram showing the arrangement of the second isolation limit switch, the third isolation limit switch, the second grounding limit switch, and the third grounding limit switch inside the central isolation grounding mechanism.

[0019] Among them, 1 is the grounding trip control line, 2 is the grounding close control line, 3 is the isolation close control line, 4 is the isolation trip control line, 5 is the first branch, 6 is the second branch, 7 is the third branch, 8 is the fourth branch, 9 is the fifth branch, 10 is the sixth branch, 11 is the seventh branch, 12 is the eighth branch, 13 is the first holding line, 14 is the ninth branch, 15 is the second holding line, 16 is the tenth branch, 17 is the motor control input line, 18 is the motor control output line, 19 is the first branch, 20 is the second branch, 21 is the rectifier bridge module, 22 is the power supply, 23 is the circuit breaker switch, 24 is the air switch, 25 is the power input bus, 26 is the branch bus, 27 is the power output bus; 28 is the motor, and 29 is the micro switch. The switch group consists of: 30 (isolation shaft gear), 31 (isolation output shaft), 3101 (first isolation switching plate), 3102 (second isolation switching plate), 32 (intermediate drive shaft), 33 (grounding switch output shaft), 3301 (first grounding switch switching plate), 3302 (second grounding switch switching plate), 34 (intermediate half gear), 35 (grounding switch shaft gear), and 36 (intermediate shaft cam); 37 (isolation limit switch group), 3701 (first isolation limit switch), 3702 (second isolation limit switch), 3703 (third isolation limit switch); 38 (intermediate drive gear); 39 (grounding switch group), 3901 (first grounding switch), 3902 (second grounding switch), 3903 (third grounding switch); and 40 (motor output gear). Detailed Implementation

[0020] The present invention will now be described in further detail with reference to the accompanying drawings.

[0021] like Figure 1 As shown, this utility model includes an input bus 25, an output bus 27, a branch bus 26, a control circuit, a holding circuit, and a motor circuit. The control circuit includes a grounding trip control line 1, a grounding close control line 2, an isolation close control line 3, and an isolation trip control line 4 connected in parallel between the input bus 25 and the output bus 27. The grounding trip control line 1 is equipped with a third relay K3, the grounding close control line 2 is equipped with a fourth relay K4, the isolation close control line 3 is equipped with a sixth relay K6, and the isolation trip control line 4 is equipped with a fifth relay K5.

[0022] like Figure 1As shown, the branch bus 26 is provided with multiple branches, wherein the first branch 5 is connected to the grounding trip control line 1 and is provided with a third switch K31; the second branch 6 is connected to the grounding close control line 2 and is provided with a fourth switch K41; the third branch 7 is connected to the isolation close control line 3 and is provided with a sixth switch K61; the fourth branch 8 is connected to the isolation trip control line 4 and is provided with a fifth switch K51; the fifth branch 9 is connected to the grounding trip control line 1 and is provided with a third switch K32; the sixth branch 10 is connected to the grounding close control line 2 and is provided with a fourth switch K42; the seventh branch 11 is connected to the isolation close control line 3 and is provided with a sixth switch K62; and the eighth branch 12 is connected to the isolation trip control line 4 and is provided with a fifth switch K52.

[0023] like Figure 1 As shown, a second grounding limit switch 3902 (also known as XC2) is provided on the grounding trip control line 1 between the first branch 5 and the fifth branch 9. At the same time, the sixth branch 10 is also controlled to open and close through the second grounding limit switch 3902 (also known as XC2). When the second grounding limit switch 3902 disconnects the grounding trip control line 1, it simultaneously connects the sixth branch 10.

[0024] like Figure 1 As shown, a third grounding limit switch 3903 (i.e., XC1) is provided on the grounding closing control line 2 between the second branch 6 and the sixth branch 10. At the same time, the fifth branch 9 is also controlled to open and close through the third grounding limit switch 3903 (i.e., XC1), and the principle is the same as that of the second grounding limit switch 3902. A first isolation limit switch 3701 (i.e., XC6) is provided on the grounding closing control line 2 between the sixth branch 10 and the fourth relay K4.

[0025] like Figure 1 As shown, the isolation closing control line 3 between the third branch 7 and the seventh branch 11 is equipped with a second isolation limit switch 3702 (i.e., XC3). At the same time, the eighth branch 12 is also controlled to open and close through the second isolation limit switch 3702 (i.e., XC3), and the principle is the same as the second grounding limit switch 3902. The isolation closing control line 3 between the seventh branch 11 and the sixth relay K6 is equipped with a first grounding limit switch 3901 (i.e., XC5).

[0026] like Figure 1 As shown, a third isolation limit switch 3703 (also known as XC4) is provided on the isolation trip control line 4 between the fourth branch 8 and the eighth branch 12. At the same time, the seventh branch 11 is also controlled to open and close through the third isolation limit switch 3703 (also known as XC4), and the principle is the same as that of the second grounding limit switch 3902.

[0027] like Figure 1As shown, a holding circuit is provided between the branch bus 26 and the power output bus 27. The holding circuit includes a first holding line 13 and a second holding line 15. The first holding line 13 is provided with a third switch K33, a second switch K21 and a first relay K1 in sequence. The second holding line 15 is provided with a fourth switch K43, a first switch K11 and a second relay K2 in sequence. In addition, the branch bus 26 is also provided with a ninth branch 14 and a tenth branch 16. The ninth branch 14 is connected to the first holding line 13 between the third switch K33 and the second switch K21, and a sixth switch K63 is provided on the ninth branch 14. The tenth branch 16 is connected to the second holding line 15 between the fourth switch K43 and the first switch K11, and a fifth switch K53 is provided on the tenth branch 16.

[0028] like Figure 1 As shown, the branch bus 26 and the output bus 27 are equipped with a motor circuit. The motor circuit includes a rectifier bridge module 21, a motor control input line 17, a motor 1, a motor control output line 18, a first branch 19, and a second branch 20. The branch bus 26 is connected to one side of the rectifier bridge module 21, and the other side of the rectifier bridge module 21 is connected to the output bus 27. One side of the motor 1 is connected to the rectifier bridge module 21 through the motor control input line 17, and the other side is connected to the output bus 27 through the motor control output line 18. A second switch is provided on the motor control input line 17. K22, the motor control output line 18 is equipped with a second switch K23; the motor control input line 17 of the second switch K22 on the side away from the motor 1 is connected to the motor control output line 18 of the second switch K23 on the side closer to the motor 1 via a first branch 19, and a first switch K12 is provided on the first branch 19; the motor control input line 17 of the second switch K22 on the side closer to the motor 1 is connected to the motor control output line 18 of the second switch K23 on the side away from the motor 1 via a second branch 20, and a first switch K13 is provided on the second branch 20. The rectifier bridge module 21 is used to convert the AC power input from the power supply 22 into DC power to control the rotation of the motor 1, which is a well-known technology in the art.

[0029] like Figure 1 As shown, the micro switch group 29 is located between the power input bus 25 and the branch bus 26. When the grounding trip control line 1 and the grounding close control line 2 are synchronously connected under the control of the micro switch group 29, the isolation close control line 3 and the isolation trip control line 4 are synchronously disconnected under the control of the micro switch group 29. The micro switch group 29 is a commercially available product. In this embodiment, the micro switch group 29 includes switch SL1 and switch SL2.

[0030] like Figure 1As shown, the grounding trip control line 1 is provided with a first button SA1 on the side near the power input bus 25, the grounding close control line 2 is provided with a second button SA2 on the side near the power input bus 25, the isolation close control line 3 is provided with a third button SA3 on the side near the power input bus 25, and the isolation trip control line 4 is provided with a fourth button SA4 on the side near the power input bus 25.

[0031] like Figure 1 As shown, both the power input bus 25 and the power output bus 27 are connected to the power supply 22, and the power input bus 25 and the power output bus 27 are controlled to switch on and off by the air switch 24. In addition, the end of the power output bus 27 connected to the power supply 22 is also equipped with a circuit breaker switch 2123 for use with the circuit breaker.

[0032] In this embodiment, all relays, control switches, air switches 24, isolation limit switches, and grounding limit switches are all technologies known in the art and are commercially available products.

[0033] The working principle of this utility model is as follows: When each relay is energized and engaged, this invention will control the corresponding switch one, switch two, and switch three to operate.

[0034] When this utility model is in the state of disconnecting switch closed and grounding switch open, such as Figure 3 As shown, at this time, the isolation shaft gear 30 meshes with one side of the intermediate half gear 34, while the other side of the intermediate half gear 34 does not mesh with the ground knife shaft gear 35. At this time, the intermediate half gear 34 can drive the isolation shaft gear 30 to rotate. Additionally, in this state, the first isolation switching plate 3101 on the isolation output shaft 31 disengages from the first isolation limit switch 3701, and the second isolation switching plate 3102 on the isolation output shaft 31 disengages from the second isolation limit switch 3702. Simultaneously, the second isolation switching plate 3102 presses against the third isolation limit switch 3703. At this time, as... Figure 1 As shown, the second isolation limit switch 3702 (i.e., XC3) on the isolation closing control line 3 is open, the third isolation limit switch 3703 (i.e., XC4) on the isolation opening control line 4 is closed, and the first isolation limit switch 3701 (i.e., XC6) on the grounding closing control line 2 is open.

[0035] In this state, the first grounding switch plate 3301 on the grounding switch output shaft 33 presses against the first grounding switch limit switch 3901, and the second grounding switch plate 3102 on the grounding switch output shaft 33 disengages from the second grounding switch limit switch 3902. Simultaneously, the second grounding switch plate 3102 presses against the third grounding switch limit switch 3903. At this time, if... Figure 1As shown, the first grounding limit switch 3901 (i.e. XC5) on the isolation closing control line 3 is closed, the second grounding limit switch 3902 (i.e. XC2) on the grounding trip control line 1 is open, and the third grounding limit switch 3903 (i.e. XC1) on the isolation trip control line 2102 is closed.

[0036] like Figure 4 As shown, in this state, the intermediate shaft cam 36 on the intermediate drive shaft 32 presses against the micro switch assembly 29, and as... Figure 1 As shown, the isolating closing control line 3 and isolating opening control line 4 are connected (i.e., SL2 switch is connected and SL1 switch is disconnected) to meet the operation requirements. At this time, the grounding opening control line 1 and the grounding closing control line 2 are not operable.

[0037] The specific process of switching from the energized state of the disconnector switch (closed position) and the grounding switch (open position) to the de-energized state in this utility model is as follows: Step 1, such as Figure 1 As shown, after closing the air switch 24 to connect the power supply 22, the operator presses the fourth button SA4 to connect the isolation trip control line 4. At this time, the third isolation limit switch 3703 (i.e. XC4) on the isolation trip control line 4 is in the closed state.

[0038] Step 2: After the isolation trip control line 4 is connected, the fifth relay K5 is energized and engages, controlling the corresponding fifth switches K51, K52, and K53 to close, wherein: The fifth switch K51 is closed to energize the branch bus 26; When the fifth switch K52 is closed, the eighth branch 12 is connected. Since the second isolation limit switch 3702 (i.e. XC3) on the isolation closing control line 3 is in the open state at this time, the second isolation limit switch 3702 (i.e. XC3) on the eighth branch 12 is in the closed state. Thus, the eighth branch 12 can be used to maintain the energized state during the subsequent rotation of the isolation switch. When the fifth switch K53 is closed, the second relay K2 is energized.

[0039] Step 3: After the second relay K2 is energized, the second switch K22 and the second switch K23 are closed. At this time, the AC power input from the branch bus 26 is rectified into DC power by the rectifier bridge module 21 and input into the motor 1, enabling the motor 1 to rotate. At this time, the first switch K11 is normally closed and will only open when the first relay K1 is energized and engaged. When the second relay K2 is energized, the normally closed second switch K21 is also opened, thereby ensuring that the first holding line 13 is always de-energized and the first relay K1 will not be energized, thus realizing the interlocking function.

[0040] Step 4: After motor 1 starts, as follows Figures 2-3 As shown, it transmits torque through the motor output gear 40, intermediate transmission gear 38, intermediate transmission shaft 32, and intermediate half gear 34 to drive the isolation shaft gear 30 to rotate, which in turn drives the isolation output shaft 31 to rotate the isolating switch to achieve the opening operation, until it rotates to the correct position. Specifically: Figure 2 As shown, the motor output gear 40 rotates clockwise, driving the intermediate transmission gear 38 and the intermediate transmission shaft 32 to rotate counterclockwise. Figure 3 (Another side view) The intermediate drive shaft 32 and intermediate half gear 34, as shown, rotate clockwise, driving the isolation shaft gear 30 to rotate counterclockwise. Figure 2 The isolation output shaft 31 shown rotates clockwise and compresses the isolation booster spring.

[0041] Furthermore, during rotation, the second isolation switching plate 3102 will quickly disengage from the third isolation limit switch 3703 as the isolation output shaft 31 rotates, that is... Figure 5 (In the rotated state) As shown, the second isolation switching plate 3102 disengages from the third isolation limit switch 3703 as the isolation output shaft 31 rotates clockwise, and then turns towards the second isolation limit switch 3702. Therefore, the first isolation switching plate 3101 will quickly disengage from the third isolation limit switch 3703. Figure 1 As shown, the third isolation limit switch 3703 (i.e., XC4) on the isolation trip control line 4 will quickly open, but since the second isolation limit switch 3702 (i.e., XC3) on the isolation close control line 3 is still open, the second isolation limit switch 3702 (i.e., XC3) on the eighth branch 12 is still closed, and the eighth branch 12 remains connected, thus ensuring that the fifth relay K5 is continuously energized.

[0042] Step 5: After the isolation output shaft 31 has rotated to its position, as follows... Figure 5 As shown, at this time, the second isolation switching plate 3102 rotates and presses down the second isolation limit switch 3702, as... Figure 1 As shown, since the second isolation limit switch 3702 (i.e. XC3) on the isolation closing control line 3 is closed at this time, the second isolation limit switch 3702 (i.e. XC3) on the eighth branch 12 is opened. At this time, the fifth relay K5 is de-energized, and the corresponding fifth switches K51, K52, and K53 are all opened. Among them, the opening of the fifth switch K53 de-energizes the second relay K2, which in turn opens the second switches K22 and K23 on both sides of the motor 1, and the motor 1 stops.

[0043] And such Figure 4As shown, at this time, the first isolation switching plate 3101 rotates 90° simultaneously to press the first isolation limit switch 3701, as... Figure 1 As shown, at this time, the first isolation limit switch 3701 (i.e. XC6) on the grounding closing control line 2 is closed. At the same time, since the grounding knife output shaft 33 does not rotate, the third grounding knife limit switch 3903 (i.e. XC1) on the grounding closing control line 2 remains closed. At this time, the entire grounding closing control line 2 is in a connected state except for the second button SA2.

[0044] In addition, since the grounding switch output shaft 33 does not rotate, the second grounding switch limit switch 3902 (i.e., XC2) on the grounding trip control line 1 remains open, while the second grounding switch limit switch 3902 (i.e., XC2) on the sixth branch 10 is closed.

[0045] In addition, such as Figure 3 As shown, from a mechanical perspective, since the middle half gear 34 rotates 90°, both sides of it are in a disengaged state. Meanwhile, as... Figure 4 As shown, at this time, the intermediate shaft cam 36 rotates to the micro switch group 29, triggering the micro switch group 29 to achieve a state transition, that is, as shown... Figure 1 As shown, switch SL2 is open and switch SL1 is closed. At this time, grounding trip control line 1 and grounding close control line 2 are operable, while isolation close control line 3 and isolation trip control line 4 are inoperable.

[0046] Step Six: Only after the disconnecting switch has completed its opening operation can the grounding switch be closed. At this time, if... Figure 1 As shown, since the third grounding limit switch 3903 (i.e., XC1) and the first isolation limit switch 3701 (i.e., XC6) on the grounding closing control line 2 are both closed, when the operator presses the second button SA2, the grounding closing control line 2 is connected, and the fourth relay K4 is energized. At this time, the corresponding fourth switches K41, K42, and K43 are all connected, where: The fourth switch K41 is connected, energizing the branch bus 26; When the fourth switch K42 is connected, the sixth branch 10 is connected, which ensures that the subsequent motor 1 is continuously powered. At this time, as mentioned above, the second grounding limit switch 3902 (i.e. XC2) on the sixth branch 10 is in the closed state. The fourth switch K43 is connected, which reconnects the second holding circuit 15 and restarts motor 1, causing it to rotate in the same direction. Meanwhile, the first holding circuit 13 remains disconnected, achieving interlocking.

[0047] Step 7: After motor 1 restarts and rotates in the same direction, as follows... Figure 3As shown, since the intermediate half gear 34 has already rotated 90°, it continues to rotate 90°, and the toothed side of the intermediate half gear 34 will mesh with the grounding switch shaft gear 19, thereby driving the grounding switch output shaft 33 to rotate the grounding switch to achieve closing, until it rotates to the correct position. At this time, as shown... Figure 3 As shown, the intermediate half gear 34 rotates 180° and fully meshes with the lower ground knife shaft gear 19.

[0048] Additionally, during the rotation of motor 1, due to Figure 3 The intermediate half gear 34 continues to rotate clockwise, driving the ground cutter shaft gear 35 to rotate counterclockwise, thus... Figure 5 (As shown in the other side view), when the second grounding switch plate 3302 is rotated clockwise, it will quickly disengage from the third grounding switch 3903 and turn towards the third grounding switch 3902, that is, as... Figure 1 As shown, the third grounding limit switch 3903 (i.e. XC1) on the grounding closing control line 2 is quickly disconnected, but the second grounding limit switch 3902 (XC2) on the grounding opening control line 1 remains open, thus ensuring that the sixth branch 10 can remain connected and thus ensuring that the motor 1 is continuously powered.

[0049] Step 8: After motor 1 has rotated to the correct position, as follows: Figure 5 As shown, only the second grounding switch plate 3302 is in contact with the second grounding limit switch 3902 (XC2), and as... Figure 1 As shown, due to the closure of the second grounding limit switch 3902 (XC2) on the grounding trip control line 1, the second grounding limit switch 3902 (XC2) on the sixth branch 10 is opened, the first relay K4 is de-energized, and the corresponding fourth switches K41, K42, and K43 are all opened. The opening of the fourth switch K43 causes the first relay K1 to be de-energized, which in turn causes the first switches K12 and K13 to be opened, and the motor 1 stops.

[0050] After the above steps are completed, the present invention will be transformed into a power outage state with the disconnecting switch open and the grounding switch closed.

[0051] When transitioning from a de-energized state (disconnect switch open, grounding switch closed) to an energized state, the second grounding limit switch 3902 (XC2) on the grounding trip control line 2 (step eight) is closed. Therefore, pressing the first button SA1 connects the grounding trip control line 2, energizing the third relay K3. This causes the corresponding third switches K31, K32, and K33 to close, where: The third switch K31 is closed to energize the branch bus 26; The closing of the third switch K32 connects the fifth branch 9, thereby continuously energizing the subsequent motor 1. As can be seen from step eight above, the third grounding limit switch 3903 (i.e. XC1) on the grounding closing control line 2 is open, so the third grounding limit switch 3903 (i.e. XC1) on the fifth branch 9 is closed. The third switch K33 closes to energize the first holding circuit 13 and energize the first relay K1. At this time, the first switch K12 and the first switch K13 close, the motor 1 starts and rotates in reverse, and the normally closed first switch K11 on the second holding circuit 15 opens to achieve interlocking.

[0052] Additionally, during the reverse rotation of motor 1, the second grounding switch plate 3302 and the second grounding limit switch 3902 (XC2) quickly disengage, therefore... Figure 1 As shown, the second grounding limit switch 3902 (XC2) on the grounding trip control line 2 will quickly disconnect, and at this time the fifth branch 9 will be connected, so that the third relay K3 will be continuously energized.

[0053] When motor 1 drives the grounding switch output shaft to the open position, the first grounding switch travel open 3901 (XC5) on the isolation closing control line 3 is connected, and simultaneously... Figure 3 As shown, the intermediate half gear 34 returns to a state where neither side is engaged, as... Figure 4 As shown, the intermediate shaft cam 36 triggers the micro switch group 29 again, so as... Figure 1 As shown, when SL1 is disconnected and SL2 is closed, the grounding trip control line 1 and the grounding close control line 2 are inoperable, while the isolation close control line 3 and the isolation trip control line 4 are operable.

[0054] Additionally, since the isolation output shaft 31 is not rotating at this time, Figure 1 As shown, the second isolation limit switch 3702 (i.e., XC3) on the isolation closing control line 3 remains closed, and the third isolation limit switch 3703 (i.e., XC4) on the isolation opening control line 4 remains open. This means that the third isolation limit switch 3703 (i.e., XC4) on the seventh branch 2111 is in the closed state. It can be kept connected after being energized by the sixth switch K62. At this time, when the operator presses the third button SA3, the isolation closing control line 3 is connected, and the sixth relay K6 is energized. The corresponding sixth switches K61, K62, and K63 are all closed. Among them, the sixth switch K63 reconnects the first holding line 13. At this time, the first relay K1 is energized, and the first switches K12 and K13 are closed, thereby causing the motor 1 to start again and continue to rotate in reverse.

Claims

1. A control system for an isolation grounding mechanism, characterized in that: It includes a branch bus (26), a control circuit, a holding circuit and a motor circuit. The control circuit includes a grounding trip control line (1), a grounding closing control line (2), an isolation closing control line (3) and an isolation trip control line (4) connected in parallel between the power input bus (25) and the power output bus (27). The grounding trip control line (1) is equipped with a third relay (K3), the grounding closing control line (2) is equipped with a fourth relay (K4), the isolation closing control line (3) is equipped with a sixth relay (K6), and the isolation trip control line (4) is equipped with a fifth relay (K5). The branch bus (26) is provided with multiple branches, of which the first branch (5) is connected to the grounding trip control line (1) and is provided with the third switch one (K31), the second branch (6) is connected to the grounding close control line (2) and is provided with the fourth switch one (K41), the third branch (7) is connected to the isolation close control line (3) and is provided with the sixth switch one (K61), the fourth branch (8) is connected to the isolation trip control line (4) and is provided with the fifth switch one (K51), the fifth branch (9) is connected to the grounding trip control line (1) and is provided with the third switch two (K32), the sixth branch (10) is connected to the grounding close control line (2) and is provided with the fourth switch two (K42), the seventh branch (11) is connected to the isolation close control line (3) and is provided with the sixth switch two (K62), and the eighth branch (12) is connected to the isolation trip control line (4) and is provided with the fifth switch two (K52). The grounding trip control line (1) is equipped with a second grounding limit switch (3902), and the sixth branch (10) is also controlled to open and close through the second grounding limit switch (3902); the grounding close control line (2) is equipped with a third grounding limit switch (3903) and a first isolation limit switch (3701), and the fifth branch (9) is also controlled to open and close through the third grounding limit switch (3903); the isolation close control line (3) is equipped with a second isolation limit switch (3702) and a first grounding limit switch (3901), and the eighth branch (12) is also controlled to open and close through the second isolation limit switch (3702); the isolation trip control line (4) is equipped with a third isolation limit switch (3703), and the seventh branch (11) is also controlled to open and close through the third isolation limit switch (3703); The third switch (K31) and the third switch (K32) are controlled to open and close via the third relay (K3); the fourth switch (K41) and the fourth switch (K42) are controlled to open and close via the fourth relay (K4); the fifth switch (K51) and the fifth switch (K52) are controlled to open and close via the fifth relay (K5); and the sixth switch (K61) and the sixth switch (K62) are controlled to open and close via the sixth relay (K6). The holding circuit and the motor circuit are located between the branch bus (26) and the power output bus (27), and the power on and off are controlled by the control circuit.

2. The isolation grounding mechanism control system according to claim 1, characterized in that: When the second grounding limit switch (3902) on the grounding trip control line (1) is disconnected, the second grounding limit switch (3902) on the sixth branch (10) is connected; when the third grounding limit switch (3903) on the grounding close control line (2) is disconnected, the third grounding limit switch (3903) on the fifth branch (9) is connected; when the second isolation limit switch (3702) on the isolation close control line (3) is disconnected, the second isolation limit switch (3702) on the eighth branch (12) is connected; when the third isolation limit switch (3703) on the isolation trip control line (4) is disconnected, the third isolation limit switch (3703) on the seventh branch (11) is connected.

3. The isolation grounding mechanism control system according to claim 1, characterized in that: A second grounding limit switch (3902) is provided on the grounding trip control line (1) between the first branch (5) and the fifth branch (9); a third grounding limit switch (3903) is provided on the grounding closing control line (2) between the second branch (6) and the sixth branch (10); a first isolation limit switch (3701) is provided on the grounding closing control line (2) between the sixth branch (10) and the fourth relay (K4); a second isolation limit switch (3702) is provided on the isolation closing control line (3) between the third branch (7) and the seventh branch (11); a first grounding limit switch (3901) is provided on the isolation closing control line (3) between the seventh branch (11) and the sixth relay (K6); a third isolation limit switch (3703) is provided on the isolation trip control line (4) between the fourth branch (8) and the eighth branch (12).

4. The isolation grounding mechanism control system according to claim 1, characterized in that: The holding circuit includes a first holding line (13) and a second holding line (15) connected in parallel between the branch bus (26) and the power output bus (27). The first holding line (13) is provided with a third switch (K33), a second switch (K21) and a first relay (K1) in sequence. The second holding line (15) is provided with a fourth switch (K43), a first switch (K11) and a second relay (K2) in sequence. The branch bus (26) is provided with a ninth branch (14) and a tenth branch (16). The ninth branch (14) is provided with a sixth switch (K63) and the tenth branch (16) is provided with a fifth switch (K53). The third switch (K33) is controlled by the third relay (K3), the fourth switch (K43) is controlled by the fourth relay (K4), the fifth switch (K53) is controlled by the fifth relay (K5), and the sixth switch (K63) is controlled by the sixth relay (K6).

5. The isolation grounding mechanism control system according to claim 4, characterized in that: The ninth branch (14) is connected to the first holding line (13) between the third switch (K33) and the second switch (K21), and the tenth branch (16) is connected to the second holding line (15) between the fourth switch (K43) and the first switch (K11).

6. The isolation grounding mechanism control system according to claim 4, characterized in that: The first switch (K11) is a normally closed switch and is controlled by the first relay (K1), and the second switch (K21) is a normally closed switch and is controlled by the second relay (K2).

7. The isolation grounding mechanism control system according to claim 4, characterized in that: The motor circuit includes a rectifier bridge module (21), a motor control input line (17), a motor (1), a motor control output line (18), a first branch (19), and a second branch (20). The branch bus (26) is connected to one side of the rectifier bridge module (21), and the other side of the rectifier bridge module (21) is connected to the output bus (27). One side of the motor (1) is connected to the rectifier bridge module (21) via the motor control input line (17), and the other side is connected to the output bus (27) via the motor control output line (18). A second switch (K22) is provided on the motor control input line (17), and the motor control output line (18) is... A second switch three (K23) is provided; the motor control input line (17) of the second switch two (K22) on the side away from the motor (1) is connected to the motor control output line (18) of the second switch three (K23) on the side close to the motor (1) through the first branch (19), and a first switch two (K12) is provided on the first branch (19); the motor control input line (17) of the second switch two (K22) on the side close to the motor (1) is connected to the motor control output line (18) of the second switch three (K23) on the side away from the motor (1) through the second branch (20), and a first switch three (K13) is provided on the second branch (20); The first switch two (K12) and the first switch three (K13) are controlled by the first relay (K1); the second switch two (K22) and the second switch three (K23) are controlled by the second relay (K2).

8. The isolation grounding mechanism control system according to claim 1, characterized in that: A micro switch group (29) is provided between the power input bus (25) and the branch bus (26). When the grounding trip control line (1) and the grounding close control line (2) are synchronously connected by the micro switch group (29), the isolation close control line (3) and the isolation trip control line (4) are synchronously disconnected by the micro switch group (29).

9. The isolation grounding mechanism control system according to claim 1, characterized in that: The grounding trip control line (1) has a first button (SA1) on the side near the power input bus (25), the grounding close control line (2) has a second button (SA2) on the side near the power input bus (25), the isolation close control line (3) has a third button (SA3) on the side near the power input bus (25), and the isolation trip control line (4) has a fourth button (SA4) on the side near the power input bus (25).

10. The isolation grounding mechanism control system according to claim 1, characterized in that: The power input bus (25) and power output bus (27) are both connected to the power supply (22), and the power input bus (25) and power output bus (27) are controlled to be switched on and off by an air switch (24).

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