A bypass quick-cut switch and non-power-off operation method thereof

Abstract

A bypass quick-cut switch and a bypass non-stop operation method. Relates to an electric power maintenance device, and in particular to a bypass quick-cut switch and a bypass non-stop operation method. Provided is a bypass non-stop operation online monitoring system that can achieve rapid access to the bypass system, non-perceptual switching, improve the level of non-stop operation, and improve power supply reliability. Includes a circuit breaker module electrically connected to an intelligent controller module via a cable; the circuit breaker module includes a main circuit, a three-phase current transformer, a three-phase voltage sensor on the incoming line side, a three-phase voltage sensor on the outgoing line side, a spring operating mechanism, a switch position signal module, and a current and voltage secondary protection module; the limit shaft 2 is rotated by the opening switch linear drive mechanism to release the opening switch swing plate. The present invention has the characteristics of easy installation and long plug-in life.

Description

Technical Field

[0001] The invention relates to electric power maintenance equipment, in particular to a bypass quick-cut switch and a bypass non-power-off operation method. Background Art

[0002] With the rapid development of urban construction and the increasing efforts in the construction and renovation of distribution networks, people have higher and higher requirements for less or even no power outages during planned maintenance and emergency repairs. At present, there are few disconnect switches for overhead lines in various cities. When the overhead lines are repaired or repaired, the entire line usually needs to be shut down, or the sudden operation failure of the cable line also requires a long time to find the fault point and repair it; in addition, key power users in the city or major events require high power supply reliability.

[0003] At present, the maintenance and replacement of power distribution equipment requires disconnecting the upstream switch to repair or replace the problematic equipment, and the process takes several hours, which is bound to cause long-term power outages for power users, causing economic losses and many inconveniences to users. Summary of the invention

[0004] In view of the above problems, the present invention provides a bypass non-stop operation online monitoring system which realizes rapid access to the bypass system, imperceptible switching, improves the level of non-stop operation, and improves power supply reliability.

[0005] A bypass non-stop operation online monitoring system that shortens power outage time, improves power supply reliability, and increases maintenance efficiency.

[0006] The technical solution of the present invention is: a bypass fast-cut switch, comprising a circuit breaker module electrically connected to an intelligent controller module through a cable;

[0007] The circuit breaker module includes a main circuit, a three-phase current transformer, a three-phase voltage sensor on the incoming line side, a three-phase voltage sensor on the outgoing line side, a spring operating mechanism, a switch position signal module and a current and voltage secondary protection module;

[0008] The three-phase current transformer is arranged on the main circuit to convert the large current in the circuit into a small current for the intelligent controller module to collect data, monitor the line current and judge faults;

[0009] One end of the three-phase voltage sensor module on the incoming line side and one end of the three-phase voltage sensor on the outgoing line side are electrically connected to the main circuit respectively; the other end of the three-phase voltage sensor on the incoming line side and the other end of the three-phase voltage sensor on the outgoing line side are electrically connected to the current and voltage secondary protection module respectively; the high voltage on the transmission line is reduced to the low voltage collected by the intelligent controller module, which is used for the intelligent controller module to perform electrical protection and automatic control on various faults of the power grid, and realize the electrical isolation function of the primary and secondary systems;

[0010] The three-phase current transformer, the three-phase voltage sensor on the incoming line side and the three-phase voltage sensor on the outgoing line side are electrically connected to the intelligent controller module through the current and voltage secondary protection module respectively;

[0011] The main circuit is provided with a main contact with an arc extinguishing function, which is used to carry or disconnect the load current or short-circuit current in the circuit within a specified time;

[0012] The main contacts are opened and closed by the spring operating mechanism;

[0013] The switch position signal module is electrically connected to the intelligent controller module and is fixedly arranged on the spring operating mechanism, and is used to provide the intelligent controller module with the opening and closing state of the main circuit for logical judgment of the circuit breaker position.

[0014] Also included is an SF6 pressure sensor electrically connected to the intelligent controller module.

[0015] The spring operating mechanism includes a power mechanism, a closing mechanism and an opening mechanism;

[0016] The closing mechanism comprises a closing rotating shaft, a closing elastic mechanism, a closing stop, a limit shaft 1 and a closing linear driving mechanism;

[0017] The closing rotation shaft is vertically movably arranged on the table and is rotated by the power mechanism;

[0018] The closing elastic mechanism comprises a spring connector 1, a closing spring, a spring connector 2 and a spring connecting shaft 1;

[0019] The spring connector 1 is L-shaped and fixedly arranged on the top of the closing rotating shaft;

[0020] The second spring connector is fixedly connected to the table via the first limiting shaft;

[0021] One end of the closing spring is fixedly connected to the spring connector 1, and the other end is fixedly connected to the spring connector 2;

[0022] The closing prevention device comprises a closing shaft and a closing swing plate;

[0023] The closing shaft is movably arranged on the table through a torsion spring;

[0024] The power mechanism is fixedly provided with a limit block adapted to the closing swing plate; the limit shaft is vertically movably arranged on the table and reset by a limit spring;

[0025] The closing swing plate is fixedly sleeved on the closing shaft, and the closing swing plate is limited by the limiting shaft 1 and the limiting block, and the closing spring is in an energy storage state;

[0026] The limiting shaft 1 is provided with a release groove 1 adapted to the closing swing plate, and the limiting shaft 1 is rotated to release the closing swing plate through the release groove 1, and the closing rotating shaft rotates to reset the closing spring;

[0027] The limit shaft 1 is rotated by the closing linear drive mechanism; the closing linear drive mechanism is fixedly arranged on the table and located on one side of the limit shaft 1;

[0028] The opening mechanism includes a switch main shaft, an opening cam 1, an opening spring, an opening connecting column, an opening cam 2, an output shaft, a V-shaped swing plate, a driving wheel, an opening rotating shaft, a limit rotating plate, an opening stop, a limit shaft 2 and an opening linear driving mechanism;

[0029] The switch spindle is vertically movably arranged on the table;

[0030] The opening cam 1 is fixedly arranged on the switch main shaft and is located below the platform;

[0031] The switch-off connection column is vertically fixed on the platform;

[0032] The opening spring is arranged below the platform, one end of which is fixedly connected to the opening connection column, and the other end of which is fixedly connected to the opening cam, and the energy storage and non-energy storage functions of the opening spring are realized by the rotation of the switch main shaft;

[0033] The second opening cam is fixedly arranged on the switch main shaft and is located above the platform;

[0034] The V-shaped swing plate is fixedly arranged on the opening gate rotating shaft, and the opening gate rotating shaft is vertically movably arranged on the platform;

[0035] The output shaft is arranged horizontally, one end of which is hinged to the V-shaped swing plate, and the other end of which is hinged to the second opening cam;

[0036] The pushing wheel is movably arranged on the V-shaped swing plate; a transmission cam adapted to the pushing wheel is arranged on the closing rotation shaft; the pushing wheel stores energy in the opening spring through the thrust of the transmission cam;

[0037] The limit rotating plate is fixedly arranged on the opening gate rotating shaft and is located above the V-shaped swing plate;

[0038] The gate opening prevention device comprises a gate opening shaft and a gate opening swing plate;

[0039] The opening shaft is rotatably arranged on the table and reset by a second torsion spring;

[0040] The opening gate swing plate is fixedly arranged on the top of the opening gate shaft;

[0041] The second limiting shaft can be rotatably arranged on the table and reset by the second limiting spring;

[0042] The second limiting shaft is provided with a second releasing groove adapted to one end of the gate opening swing plate;

[0043] The limit rotating plate is provided with a gate-opening limit block adapted to the gate-opening swing plate;

[0044] The gate opening linear drive mechanism is fixedly arranged on the platform and is located on one side of the second limiting axis;

[0045] The second limiting shaft is rotated by the opening gate linear driving mechanism to release the opening gate swing plate.

[0046] The power mechanism includes a motor, a reducer, a rotating shaft, a driving gear and a driven gear

[0047] The reducer is fixedly arranged on the table and rotated by the motor;

[0048] The rotating shaft is vertically rotatably arranged on the table, and the bottom is drivingly connected to the reducer;

[0049] The driving gear is fixedly sleeved on the rotating shaft;

[0050] The driven gear is fixedly connected to the closing rotating shaft and meshes with the driving gear.

[0051] It also includes an indicating mechanism; the indicating mechanism includes an indicating rotating rod, a rotating rod cam and an indicating needle;

[0052] The indicating rotating rod is vertically rotatably arranged on the table and is located on one side of the rotating shaft;

[0053] The rotating shaft is provided with a first cam which is fixedly connected and is located above the driving gear;

[0054] The first cam is provided with a sliding rod fixedly connected thereto;

[0055] The rotating rod cam is horizontally fixedly arranged on the indicating rotating rod and is provided with a sliding groove adapted to the sliding rod;

[0056] The indicator needle is fixedly arranged on the top of the indicator rotating rod, and the rotation indicating function of the indicator needle is realized by the movement of the sliding rod in the sliding groove;

[0057] The closing linear drive mechanism and the opening linear drive mechanism are respectively electromagnet telescopic rods.

[0058] The current and voltage secondary protection module includes a Va protection circuit and an IA protection circuit;

[0059] The Va protection circuit includes a gas protection tube D3 and a sampling resistor R5 connected in parallel.

[0060] The IA protection circuit includes a capacitor C1, a varistor R1, a varistor R2, a resistor R3, a resistor R4, a trigger diode Q1 and a trigger diode Q2;

[0061] The first ends of the capacitor C1, the varistor R1, the varistor R2 and the trigger diode Q2 are electrically connected to the first input terminal IA respectively;

[0062] The varistor R2 is connected in series with the resistor R3;

[0063] The second ends of the capacitor C1, the varistor R1, the resistor R3 and the trigger diode Q2 are electrically connected to the second input terminal IN respectively;

[0064] One end of the resistor R4 is connected between the varistor R2 and the resistor R3 , and the other end of the resistor R4 is electrically connected to the trigger diode Q2 through the trigger diode Q1 .

[0065] A bypass non-stop power operation method, comprising two bypass quick-cut switches, namely a 1# bypass quick-cut switch arranged between a 1# ring main unit and a 2# ring main unit, and a 2# bypass quick-cut switch arranged between a 2# ring main unit and a 3# ring main unit;

[0066] The switches 3QF1 and 3QF2 in the 3# ring main unit and the switch 2QF2 in the 2# ring main unit are kept in the closed state; the 3# ring main unit provides the power for the normal operation of the 2# ring main unit;

[0067] When planning maintenance or replacement of the 3# ring main unit, perform the following steps:

[0068] 1) Overlap bypass operation circuit:

[0069] 1.1) The switch 2QF1 in the 2# ring main unit and the switch 1QF1 in the 1# ring main unit are in the split state respectively;

[0070] 1.2) Electrically connect one end of the 1# bypass quick-cut switch to the switch 1QF1 in the 1# ring main unit, and the other end in series with the three-way connector;

[0071] One of the three-way connectors is electrically connected to the backup interval switch 2QF1 of the 2# ring main unit, and the other is electrically connected to the 2# bypass quick-cut switch.

[0072] 2) Bypass power supply reverse operation:

[0073] 2.1) When the pressure detection of the 1# bypass quick-cut switch is in the on state, the switches 1QF1 and 2QF1 are closed, and the 2# ring main unit switch 2QF2 is disconnected;

[0074] 2.2) After the pressure detection of the 1# bypass quick-cut switch detects that the voltage has changed from being on to being off, the 1# bypass quick-cut switch is quickly closed to restore the power supply to the 1# ring main unit;

[0075] When the planned maintenance or replacement of the 3# ring main unit is completed, the operation sequence for restoring power supply to the 2# and 3# ring main units is as follows:

[0076] 3) Overlap the bypass circuit to restore power supply:

[0077] 3.1) Electrically connect the 2# bypass quick-cut switch to the switch 3QF3 of the 3# ring main unit;

[0078] Switch 1QF1, switch 2QF1 and 1# bypass quick-cut switch are in the closed position respectively;

[0079] Switch 2QF2, switch 3QF1 and switch 3QF3 are in split state respectively;

[0080] The 2# bypass quick-cut switch is in the open position.

[0081] 3.2) Electrically connect the 2# bypass quick-cut switch to the switch 3QF3 of the 3# ring main unit;

[0082] 4) Restoring power supply:

[0083] 4.1) Power supply restoration operation:

[0084] Close switch 3QF2, and the power supply of 3# ring main unit is restored. Close switch 3QF3, and when voltage is detected on both sides of 2# bypass quick-cut switch, lock and close;

[0085] The no-pressure detection function of the 1# bypass quick-cut switch is turned off, and the load side of the 2# bypass quick-cut switch changes from pressure to no pressure, and the switch is automatically closed to restore the power supply to the 2# ring main unit;

[0086] 4.2) Dismantling of bypass operation loop:

[0087] Close switch 2QF2 and switch 3QF1 respectively; set 1# bypass quick-cut switch, switch 2QF1 and switch 3QF3 to standby state respectively; then remove the bypass and complete the operation.

[0088] The present invention comprises a circuit breaker module which is electrically connected to an intelligent controller module through a cable; the circuit breaker module comprises a main circuit, a three-phase current transformer, a three-phase voltage sensor on an incoming line side, a three-phase voltage sensor on an outgoing line side, a spring operating mechanism, a switch position signal module and a current and voltage secondary protection module; it has overcurrent and circuit breaker protection functions; it can quickly detect the phase sequence of a bypass side and an original power supply side; it can detect a voltage-free closing function; the cable adopts a special flexible cable quick plug-in connector, which has the characteristics of easy installation and long plug-in life.

[0089] This case improves core competitiveness, promotes technological progress and equipment upgrades, and improves the reliability of power supply for equipment and power grids by carrying out bypass non-stop power supply operations. At the same time, it safely and quickly completes planned maintenance and fault repair work, effectively resolving the contradiction between equipment power outage maintenance and uninterrupted power supply to users, greatly improving the quality of safe power supply services, and laying a solid foundation for building a strong, reliable, economical and efficient distribution system, meeting the diversified needs of users, and achieving sustainable development of the power grid. BRIEF DESCRIPTION OF THE DRAWINGS

[0090] Figure 1 This is a schematic diagram of the circuit structure when the bypass operation loop is connected.

[0091] Figure 2 This is a schematic diagram of the circuit structure during bypass power supply reverse operation.

[0092] Figure 3 This is a schematic diagram of the circuit structure when the bypass operation circuit is connected to restore power supply.

[0093] Figure 4 This is a schematic diagram of the circuit structure when power is restored.

[0094] Figure 5 This is a schematic diagram of the electrical connection principle between the bypass fast-cut switch and the controller (the controller includes the controller simulation module and the controller CPU module).

[0095] Figure 6 It is a structural diagram of the current and voltage secondary protection module.

[0096] Figure 7 It is a schematic diagram of the structure of the IA protection circuit.

[0097] Figure 8 It is a schematic diagram of the structure of the Va protection circuit.

[0098] Fig. 9 This is the principle design block diagram of the controller.

[0099] Fig.10 This is a schematic diagram of the structure of the bypass quick-cut switch box.

[0100] Fig.11This is a schematic diagram of the top view of the bypass quick-cut switch box.

[0101] Fig.12 This is a three-dimensional structure diagram of the spring operating mechanism. Figure 1 ,

[0102] Fig.13 This is a three-dimensional structure diagram of the spring operating mechanism. Figure 2 ,

[0103] Fig.14 This is a three-dimensional structural diagram of the closing mechanism (some parts are hidden to clearly express its structure).

[0104] Fig.15 This is a three-dimensional structure diagram of the opening mechanism. Figure 1 (In order to clearly express its structure, some parts are hidden),

[0105] Fig.16 This is a three-dimensional structure diagram of the opening mechanism. Figure 2 (In order to clearly express its structure, some parts are hidden),

[0106] Fig.17 This is a three-dimensional structure diagram of the opening mechanism. Figure 3 (In order to clearly express its structure, some parts are hidden),

[0107] Fig.18 This is a three-dimensional structure diagram of the opening mechanism. Figure 4 (In order to clearly express its structure, some parts are hidden),

[0108] Fig.19 This is a three-dimensional structure diagram of the opening mechanism. Figure 5 (In order to clearly express its structure, some parts are hidden),

[0109] In the figure, 1 is a power mechanism, 11 is a motor, 12 is a reducer, 13 is a rotating shaft, 14 is a driving gear, and 15 is a driven gear.

[0110] 2 is the closing mechanism,

[0111] 21 is the closing rotating shaft, 211 is the transmission cam, 22 is the closing elastic mechanism, 221 is the spring connector 1, 222 is the closing spring,

[0112] 231 is the closing shaft, 232 is the closing swing plate,

[0113] 24 is a limit shaft 1, 241 is a release groove 1, 25 is a closing linear drive mechanism,

[0114] 3 is the opening mechanism,

[0115] 31 is the switch main shaft, 32 is the opening cam 1, 33 is the opening spring, 34 is the opening connection column, 35 is the opening cam 2, 36 is the output shaft, 37 is the V-shaped swing plate, 38 is the driving wheel, 39 is the opening shaft, 310 is the limit rotating plate, 311 is the opening stop, 312 is the limit shaft 2, 313 is the opening linear drive mechanism,

[0116] 3111 is the opening shaft, 3112 is the opening swing plate,

[0117] 4 is an indicating mechanism, 41 is an indicating rotating lever, 42 is a rotating lever cam, and 43 is an indicating needle. DETAILED DESCRIPTION

[0118] The present invention Figure 1-19 As shown; a bypass quick-cut switch, including a circuit breaker module electrically connected to an intelligent controller module through a cable;

[0119] The model of the intelligent controller module in this case is BC-LOCK644610, which adopts DSP+ARM hardware architecture, meets the requirements of protection, control and communication, detects the function of no-pressure rapid automatic closing on one side of the circuit breaker according to the set program language, and has the function of nuclear phase detection. The intelligent controller module communication configuration has one 4G (101 specification), one RS232 serial port for connecting wireless LORA, user bypass system detection, and one RS232 for debugging.

[0120] The circuit breaker module includes a main circuit, a three-phase current transformer, a three-phase voltage sensor on the incoming line side, a three-phase voltage sensor on the outgoing line side, a spring operating mechanism, a switch position signal module and a current and voltage secondary protection module;

[0121] The three-phase current transformer is arranged on the main circuit to convert the large current in the circuit into a small current of 1A for data collection by the intelligent controller module, and to monitor the line current and judge faults;

[0122] One end of the three-phase voltage sensor module on the incoming line side and one end of the three-phase voltage sensor on the outgoing line side are electrically connected to the main circuit respectively; the other end of the three-phase voltage sensor on the incoming line side and the other end of the three-phase voltage sensor on the outgoing line side are electrically connected to the current and voltage secondary protection module respectively; the high voltage on the transmission line is reduced to the low voltage collected by the intelligent controller module, which is used for the intelligent controller module to perform electrical protection and automatic control on various faults of the power grid, and realize the electrical isolation function of the primary and secondary systems;

[0123] The three-phase current transformer, the three-phase voltage sensor on the incoming line side and the three-phase voltage sensor on the outgoing line side are electrically connected to the intelligent controller module through the current and voltage secondary protection module respectively; when the secondary circuit is not connected to the intelligent controller module or the connection is not firm, it is used to effectively ensure that the secondary side of the three-phase circuit transformer (CT) is not open, so as to avoid causing high voltage on the secondary side of the three-phase circuit transformer and causing accidents;

[0124] The main circuit is provided with a main contact with an arc extinguishing function, which is used to carry or disconnect the load current or short-circuit current in the circuit within a specified time;

[0125] The main contacts are opened and closed by the spring operating mechanism;

[0126] The switch position signal module is electrically connected to the intelligent controller module and is fixedly arranged on the spring operating mechanism, and is used to provide the intelligent controller module with the opening and closing state of the main circuit for logical judgment of the circuit breaker position.

[0127] like Figure 5 As shown in the figure, PS (GAS auxiliary contact) is a normally closed contact, HS (manual locking switch) is a normally open contact, CT is a current transformer, MS is a travel switch, HS is a manual locking contact, PS is a gas contact, M is a motor, RA is an aviation socket, RB is an external power terminal, HV-R is a voltage sensor, and WCN is a non-energy storage signal.

[0128] like Fig.10 As shown in the figure, the bypass quick-cut switch box is equipped with 6 fast high-voltage cable plug-in sockets, which adopt a snap-on design and are used to connect the main circuit, so as to quickly connect the bypass circuit during live bypass operation. The bypass quick-cut switch box has 2 groups of 6 impedance voltage sensors built in, including A, B, C on the power side and R, S, T on the load side (the secondary voltage can be adjusted as needed); the accuracy (-25℃~+80℃) is stably maintained at 0.5%, which can ensure the accuracy of the voltage signals collected on both sides of the circuit breaker.

[0129] The bypass quick-cut switch box is made of stainless steel, and the surface of the box is provided with an epoxy resin coating layer to improve the insulation and sealing of the box. The circuit breaker is sealed in the box, and the box is filled with a specified value of SF6 gas. The SF6 gas arc extinguishing method is adopted to reliably ensure its ability to close and break short-circuit fault currents. Even if the gas leakage causes its pressure to drop, its rated insulation strength and rated closing and breaking capacity can be guaranteed. For further optimization, an SF6 gas pressure gauge is added to the bypass quick-cut switch box. When the pressure gauge indicates in the green area, it means the pressure is normal; when the pointer indicates in the red area, it means gas leakage, which should be repaired or replaced in time.

[0130] The upper part and the bottom of the rear end of the bypass quick-cut switch box are respectively provided with a φ13 stainless steel grounding stud and a grounding mark for installing the grounding wire. Its structure can easily connect the 22-38mm² copper wire to the ground wire without the use of additional auxiliary clamps. In addition, there are φ13 holes on the left and right legs at the rear of the bypass quick-cut switch box, which can also be used to install the grounding wire.

[0131] It also includes an SF6 pressure sensor electrically connected to the intelligent controller module. Figure 5 PS gas contact in.

[0132] The spring operating mechanism comprises a power mechanism 1, a closing mechanism 2 and an opening mechanism 3;

[0133] The closing mechanism 2 includes a closing rotating shaft 21, a closing elastic mechanism 22, a closing prevention and limiting shaft 24 and a closing linear driving mechanism 25;

[0134] The closing rotating shaft 21 is vertically movably arranged on the table and is rotated by the power mechanism 1;

[0135] The closing elastic mechanism 22 comprises a spring connector 1 221, a closing spring 222, a spring connector 2 and a spring connecting shaft 1;

[0136] The spring connector 1 221 is L-shaped and fixedly disposed on the top of the closing rotation shaft 21;

[0137] The spring connector 2 is fixedly connected to the table through the limiting shaft 1 24; the limiting shaft is vertically fixedly arranged on the table; the spring connector 2 is fixedly connected to the top of the limiting shaft;

[0138] One end of the closing spring 222 is fixedly connected to the spring connector 1 221, and the other end is fixedly connected to the spring connector 2;

[0139] The closing prevention device includes a closing shaft 231 and a closing swing plate 232;

[0140] The closing shaft 231 is movably arranged on the table through a torsion spring 1; a torsion spring 1 is fixedly arranged at the bottom of the closing shaft 231, and the closing shaft 231 is rotated and reset by the torsion spring;

[0141] The power mechanism 1 (the driven gear 15 in the power mechanism 1) is fixedly provided with a limit block adapted to the closing swing plate 232; the cross section of the limit block in this case is circular;

[0142] The limit shaft 24 is vertically movably arranged on the table and is reset by a limit spring. The spring operating mechanism is provided with matching limit columns at the top and bottom of the limit shaft 24, and a limit plate matched with the limit column is provided on the limit shaft to limit the rotation range of the limit shaft 24. A limit spring is provided between the limit column and the limit plate. When the limit shaft 24 is rotated to a certain angle by an external force, it is reset by a limit spring.

[0143] The closing swing plate 232 is fixedly sleeved on the closing shaft 231, and the closing swing plate 232 is limited by the limiting shaft 1 24 and the limiting block, and the closing spring 222 is in an energy storage state (i.e., stretched);

[0144] The limiting shaft 24 is provided with a release groove 241 adapted to the closing swing plate 232. When the limiting shaft 24 rotates, the closing swing plate 232 is released from the limit by passing through the release groove 241, and the closing rotating shaft 21 rotates to reset the closing spring 222.

[0145] The limit shaft 1 24 is rotated by the closing linear drive mechanism 25; the closing linear drive mechanism 25 is fixedly arranged on the table, and is located on one side of the limit shaft 1 24;

[0146] The opening mechanism 3 includes a switch main shaft 31, an opening cam 1 32, an opening spring 33, an opening connection column 34, an opening cam 2 35, an output shaft 36, a V-shaped swing plate 37, a driving wheel 38, an opening rotating shaft 39, a limit rotating plate 310, an opening stop 311, a limit shaft 2 312 and an opening linear driving mechanism 313;

[0147] The switch spindle 31 is vertically movably arranged on the table;

[0148] The opening cam 1 32 is fixedly arranged on the switch main shaft 31 and is located below the platform;

[0149] The opening connection column 34 is vertically fixedly arranged on the platform;

[0150] The opening spring 33 is arranged below the platform, one end of which is fixedly connected to the opening connection column 34, and the other end of which is fixedly connected to the opening cam 1 32. The energy storage and non-energy storage functions of the opening spring 33 are realized by the rotation of the switch main shaft 31;

[0151] The second opening cam 35 is fixedly disposed on the switch main shaft 31 and is located above the platform;

[0152] The V-shaped swing plate 37 is fixedly arranged on the opening switch shaft 39, and the opening switch shaft 39 is vertically movably arranged on the platform;

[0153] The output shaft 36 is arranged horizontally, one end of which is hinged to the V-shaped swing plate 37, and the other end of which is hinged to the second opening cam 35;

[0154] The pushing wheel 38 is movably arranged on the V-shaped swing plate 37; a transmission cam 211 adapted to the pushing wheel 38 is arranged on the closing rotation shaft 21; the pushing wheel 38 stores energy in the opening spring 33 through the thrust of the transmission cam 211;

[0155] The limit rotating plate 310 is fixedly arranged on the opening rotating shaft 39 and is located above the V-shaped swing plate 37;

[0156] The gate opening prevention 311 includes a gate opening shaft 3111 and a gate opening swing plate 3112; in this case, the gate opening prevention 311 and the gate closing prevention have the same structural principle;

[0157] The opening shaft 3111 is rotatably disposed on the table and reset by a second torsion spring;

[0158] The opening gate swing plate 3112 is fixedly arranged on the top of the opening gate shaft 3111;

[0159] The second limiting shaft 312 can be rotatably arranged on the table and reset by the second limiting spring;

[0160] The second limiting shaft 312 is provided with a second releasing groove adapted to one end of the gate opening swing plate 3112;

[0161] The limit rotating plate 310 is provided with a gate-opening limit block adapted to the gate-opening swing plate 3112;

[0162] The gate opening linear driving mechanism 313 is fixedly disposed on the platform and is located on one side of the second limiting axis 312;

[0163] The second limiting shaft 312 is rotated by the opening gate linear driving mechanism 313 to release the opening gate swing plate 3112 .

[0164] The operation steps of this case are: Figure 12-14 As shown, in the closing state, when the limit block touches the closing stop, it is restricted by the limit shaft 1 24 and stuck. When executing the opening state, the telescopic rod of the closing linear drive mechanism 25 is extended, and the initial limit shaft 1 24 rotates. When the end of the closing swing plate 232 is completely free from the restraint of the release groove 1 241, the limit block continues to rotate counterclockwise; when the transmission cam 211 on the closing rotation shaft 21 collides with the driving wheel 38, the driving wheel 38 is driven to rotate. The driving wheel 38 is movably set on the V-shaped swing plate 37, that is, the output shaft 36 drives the opening cam 2 35 to move in the outward direction, realizing the rotation of the switch main shaft 31 (such as Fig.15As shown, in actual production, the switch main shaft 31 continues to extend downward, directly connected to the switch hinge shaft of the circuit breaker and fixedly connected, and the opening or closing function is realized by driving the rotation of the hinge shaft), and finally the opening function is realized.

[0165] like Figure 16-19 As shown, when the output shaft 36 moves outward, the opening spring 33 is continuously stretched and the opening spring 33 continuously stores energy; finally, the energy storage limit of the opening spring 33 is achieved through the joint action of the limit shaft 2 312 and the opening limit block at both ends of the opening stop 311.

[0166] When the circuit breaker needs to be closed, the telescopic rod of the opening linear drive mechanism 313 is extended to push the limit shaft 2 312 to rotate. By releasing the limit state of the groove 2 contacting the opening swing plate 3112, the switch main shaft 31 rotates counterclockwise under the action of the opening spring 33 to realize the closing function.

[0167] The power mechanism 1 includes a motor 11, a reducer 12, a rotating shaft 13, a driving gear 14 and a driven gear 15

[0168] The reducer 12 is fixedly mounted on the table and rotated by the motor 11;

[0169] The rotating shaft 13 is vertically rotatably disposed on the table, and the bottom is drivingly connected to the reducer 12;

[0170] The driving gear 14 is fixedly sleeved on the rotating shaft 13;

[0171] The driven gear 15 is fixedly connected to the closing rotating shaft 21 and meshes with the driving gear 14;

[0172] The rotating shaft 13 is rotated by the motor 11 , and the driven gear 15 is meshed with the driving gear 14 on the rotating shaft 13 to achieve a rotating function.

[0173] It also includes an indicating mechanism 4; the indicating mechanism 4 includes an indicating rotating rod 41, a rotating rod cam 42 and an indicating needle 43;

[0174] The indicating rotating rod 41 is vertically rotatably disposed on the table and is located on one side of the rotating shaft 13;

[0175] The rotating shaft 13 is provided with a first cam fixedly connected thereto, and is located above the driving gear 14;

[0176] The first cam is provided with a sliding rod fixedly connected thereto;

[0177] The rotating rod cam 42 is horizontally fixedly arranged on the indicating rotating rod 41 and is provided with a sliding groove adapted to the sliding rod;

[0178] The indicator needle 43 is fixedly arranged on the top of the indicator rotating rod 41, and the box body is provided with "energy stored" and "energy not stored" indicator signs adapted to the indicator needle 43; the rotation indication function of the indicator needle 43 is realized by the movement of the sliding rod in the slide groove;

[0179] The closing linear drive mechanism 25 and the opening linear drive mechanism 313 are respectively electromagnet telescopic rods.

[0180] The current and voltage secondary protection module includes a Va protection circuit and an IA protection circuit;

[0181] The Va protection circuit includes a gas protection tube D3 and a sampling resistor R5 connected in parallel.

[0182] A resistive voltage sensor is provided at the front end of Va, one end of which is connected to the high voltage, and the other end is connected to Va; Va is the sampling voltage, which is protected against surges by the gas protection tube D3; R5 is a high-precision sampling resistor, and the value of R5 is sampled by the controller to determine whether there is pressure in the primary circuit and the actual voltage value.

[0183] In this case, in addition to the Va protection circuit, there are also Vb, Vc, Vr, Vs and Vt protection circuits, which have the same structure as the Va protection circuit. For example, the Vb protection circuit, such as Figure 6 As shown, the left ends are Vb and GND, and the right ends are RA-m and RA-g, and the electrical components are electrically connected in the same way.

[0184] The IA protection circuit includes a capacitor C1, a varistor R1, a varistor R2, a resistor R3, a resistor R4, a trigger diode Q1 and a trigger diode Q2;

[0185] The first ends of the capacitor C1, the varistor R1, the varistor R2 and the trigger diode Q2 are electrically connected to the first input terminal IA respectively;

[0186] The varistor R2 is connected in series with the resistor R3;

[0187] The second ends of the capacitor C1, the varistor R1, the resistor R3 and the trigger diode Q2 are electrically connected to the second input terminal IN respectively;

[0188] One end of the resistor R4 is connected between the varistor R2 and the resistor R3, and the other end is electrically connected to the trigger diode Q2 through the trigger diode Q1. Both ends of the trigger diode Q2 are output ends, and the second input end of the trigger diode Q2 is grounded.

[0189] Capacitor C1 is used for filtering, and varistor R1 can provide surge overvoltage protection;

[0190] The varistor R2 prevents the voltage between IA and IN from increasing due to the open circuit on the secondary side of the CT, reduces its own resistance, and the voltage across R3 increases, thereby triggering the diode Q1 to turn on; in the normal state (no open circuit), the value of the varistor is infinite, the trigger diode Q1 and the bidirectional thyristor Q2 do not work, and do not affect the controller's acquisition of the current loop;

[0191] Resistor R4 is a current limiting resistor to protect the trigger diode Q1;

[0192] After the diode Q1 is triggered to conduct, the bidirectional thyristor Q2 is triggered to conduct, thus short-circuiting IA and IN, thereby preventing overvoltage caused by the open circuit on the secondary side of CT.

[0193] In this case, in addition to the IA protection circuit, there are also IB and IC protection circuits, whose circuit structures are the same as those of IA, except that the corresponding connection terminals at both ends are changed. Figure 6 As shown, for example, the left end of the IB protection circuit is connected to IB and IN respectively, and the right end is connected to RA-B and RA-D respectively.

[0194] A bypass non-stop power operation method, comprising two bypass quick-cut switches, namely a 1# bypass quick-cut switch arranged between a 1# ring main unit and a 2# ring main unit, and a 2# bypass quick-cut switch arranged between a 2# ring main unit and a 3# ring main unit;

[0195] like Figure 1 As shown, switches 3QF1 and 3QF2 in the 3# ring main unit and switch 2QF2 in the 2# ring main unit are kept in the closed state respectively; the 3# ring main unit provides power for the normal operation of the 2# ring main unit;

[0196] When the 3# ring main unit is planned for maintenance or replacement, in order to ensure zero or minimal power outage for the 2# ring main unit load, the following steps are performed:

[0197] 1) Overlap bypass operation circuit, such as Figure 1 As shown:

[0198] 1.1) The switch 2QF1 in the 2# ring main unit and the switch 1QF1 in the 1# ring main unit (the 1# ring main unit is a temporary power supply point) are in the open position;

[0199] 1.2) Electrically connect one end of the 1# bypass quick-cut switch to the switch 1QF1 in the 1# ring main unit, and the other end in series with the three-way connector;

[0200] One of the three-way connectors is electrically connected to the backup interval switch 2QF1 of the 2# ring main unit, and the other is electrically connected to the 2# bypass quick-cut switch.

[0201] 2) Bypass power supply reverse operation:

[0202] 2.1) When the voltage detection of the 1# bypass quick-cut switch is in the on state (with the function of detecting whether there is voltage), such as Figure 2 As shown, switch 1QF1 and switch 2QF1 are closed, and switch 2QF2 of 2# ring main unit is disconnected;

[0203] 2.2) After the pressure detection of the 1# bypass quick-cut switch detects that the voltage has changed from being on to being off, the 1# bypass quick-cut switch is quickly closed to restore the power supply to the 1# ring main unit;

[0204] When the planned maintenance or replacement of the 3# ring main unit is completed, the operation sequence for restoring power supply to the 2# and 3# ring main units is as follows:

[0205] 3) Overlap the bypass circuit to restore power supply, such as Figure 3 As shown:

[0206] 3.1) Electrically connect the 2# bypass quick-cut switch to the switch 3QF3 of the 3# ring main unit;

[0207] Switch 1QF1, switch 2QF1 and 1# bypass quick-cut switch are in the closed position respectively;

[0208] Switch 2QF2, switch 3QF1 and switch 3QF3 are in split state respectively;

[0209] The 2# bypass quick-cut switch is in the open position.

[0210] 3.2) Electrically connect the 2# bypass quick-cut switch to the switch 3QF3 of the 3# ring main unit;

[0211] 4) Restoring power supply:

[0212] 4.1) Restore power supply, such as Figure 4 As shown:

[0213] Close switch 3QF2, and the power supply of 3# ring main unit is restored. Close switch 3QF3, and when voltage is detected on both sides of 2# bypass quick-cut switch, lock and close;

[0214] The no-pressure detection function of the 1# bypass quick-cut switch is turned off, and the load side of the 2# bypass quick-cut switch changes from pressure to no pressure, and the switch is automatically closed to restore the power supply to the 2# ring main unit;

[0215] 4.2) Dismantling of bypass operation loop:

[0216] Close switch 2QF2 and switch 3QF1 respectively; set 1# bypass quick-cut switch, switch 2QF1 and switch 3QF3 to standby state respectively; then remove the bypass and complete the operation.

[0217] Regarding the contents disclosed in this case, there are a few points that need to be explained:

[0218] (1) The drawings of the embodiments disclosed in this case only involve the structures involved in the embodiments disclosed in this case. Other structures can refer to the general design;

[0219] (2) In the absence of conflict, the embodiments and features of the embodiments disclosed in this case may be combined with each other to obtain new embodiments;

[0220] The above are only specific implementation methods disclosed in this case, but the protection scope of the present disclosure is not limited thereto. The protection scope disclosed in this case should be based on the protection scope of the claims.

Claims

1. A bypass quick-cut switch, characterized in that: including a circuit breaker module electrically connected to the intelligent controller module via a cable; The circuit breaker module includes a main circuit, a three-phase current transformer, a three-phase voltage sensor on the incoming line side, a three-phase voltage sensor on the outgoing line side, a spring operating mechanism, a switch position signal module and a current and voltage secondary protection module; The three-phase current transformer is arranged on the main circuit to convert the large current in the circuit into a small current for the intelligent controller module to collect data, monitor the line current and judge faults; One end of the three-phase voltage sensor on the incoming line side and one end of the three-phase voltage sensor on the outgoing line side are electrically connected to the main circuit respectively; the other end of the three-phase voltage sensor on the incoming line side and the other end of the three-phase voltage sensor on the outgoing line side are electrically connected to the current and voltage secondary protection module respectively, reducing the high voltage on the transmission line to the low voltage collected by the intelligent controller module, which is used for the intelligent controller module to perform electrical protection and automatic control on various faults of the power grid, and realize the electrical isolation function of the primary and secondary systems; The three-phase current transformer, the three-phase voltage sensor on the incoming line side and the three-phase voltage sensor on the outgoing line side are electrically connected to the intelligent controller module through the current and voltage secondary protection module respectively; The main circuit is provided with a main contact with an arc extinguishing function, which is used to carry or disconnect the load current or short-circuit current in the circuit within a specified time; The main contacts are opened and closed by the spring operating mechanism; The switch position signal module is electrically connected to the intelligent controller module and is fixedly arranged on the spring operating mechanism, and is used to provide the intelligent controller module with the opening and closing state of the main circuit for logical judgment of the circuit breaker position; The spring operating mechanism includes a power mechanism, a closing mechanism and an opening mechanism; The closing mechanism comprises a closing rotating shaft, a closing elastic mechanism, a closing stop, a limit shaft 1 and a closing linear driving mechanism; The closing rotation shaft is vertically movably arranged on the table and is rotated by the power mechanism; The closing elastic mechanism comprises a spring connector 1, a closing spring, a spring connector 2 and a spring connecting shaft 1; The spring connector 1 is L-shaped and fixedly arranged on the top of the closing rotating shaft; The second spring connector is fixedly connected to the table via the first limiting shaft; One end of the closing spring is fixedly connected to the spring connector 1, and the other end is fixedly connected to the spring connector 2; The closing prevention device comprises a closing shaft and a closing swing plate; The closing shaft is movably arranged on the table through a torsion spring; The power mechanism is fixedly provided with a limit block adapted to the closing swing plate; the limit shaft is vertically movably arranged on the table and reset by a limit spring; The closing swing plate is fixedly sleeved on the closing shaft, and the closing swing plate is limited by the limiting shaft 1 and the limiting block, and the closing spring is in an energy storage state; The limiting shaft 1 is provided with a release groove 1 adapted to the closing swing plate, and the limiting shaft 1 is rotated to release the closing swing plate through the release groove 1, and the closing rotating shaft rotates to reset the closing spring; The limit shaft 1 is rotated by the closing linear drive mechanism; the closing linear drive mechanism is fixedly arranged on the table and located on one side of the limit shaft 1; The opening mechanism includes a switch main shaft, an opening cam 1, an opening spring, an opening connecting column, an opening cam 2, an output shaft, a V-shaped swing plate, a driving wheel, an opening rotating shaft, a limit rotating plate, an opening stop, a limit shaft 2 and an opening linear driving mechanism; The switch spindle is vertically movably arranged on the table; The opening cam 1 is fixedly arranged on the switch main shaft and is located below the platform; The switch-off connection column is vertically fixed on the platform; The opening spring is arranged below the platform, one end of which is fixedly connected to the opening connection column, and the other end of which is fixedly connected to the opening cam, and the energy storage and non-energy storage functions of the opening spring are realized by the rotation of the switch main shaft; The second opening cam is fixedly arranged on the switch main shaft and is located above the platform; The V-shaped swing plate is fixedly arranged on the opening gate rotating shaft, and the opening gate rotating shaft is vertically movably arranged on the platform; The output shaft is arranged horizontally, one end of which is hinged to the V-shaped swing plate, and the other end of which is hinged to the second opening cam; The pushing wheel is movably arranged on the V-shaped swing plate; a transmission cam adapted to the pushing wheel is arranged on the closing rotation shaft; the pushing wheel stores energy in the opening spring through the thrust of the transmission cam; The limit rotating plate is fixedly arranged on the opening gate rotating shaft and is located above the V-shaped swing plate; The gate opening prevention device comprises a gate opening shaft and a gate opening swing plate; The opening shaft is rotatably arranged on the table and reset by a second torsion spring; The opening gate swing plate is fixedly arranged on the top of the opening gate shaft; The second limiting shaft can be rotatably arranged on the table and reset by the second limiting spring; The second limiting shaft is provided with a second releasing groove adapted to one end of the gate opening swing plate; The limit rotating plate is provided with a gate-opening limit block adapted to the gate-opening swing plate; The gate opening linear drive mechanism is fixedly arranged on the table, and is located on one side of the second limiting axis; The second limiting shaft is rotated by the opening gate linear driving mechanism to release the opening gate swing plate.

2. A bypass fast-cut switch according to claim 1, characterized in that: Also included is an SF6 pressure sensor electrically connected to the intelligent controller module.

3. A bypass fast-cut switch according to claim 1, characterized in that: The power mechanism includes a motor, a reducer, a rotating shaft, a driving gear and a driven gear; The reducer is fixedly arranged on the table and rotated by the motor; The rotating shaft is vertically rotatably arranged on the table, and the bottom is drivingly connected to the reducer; The driving gear is fixedly sleeved on the rotating shaft; The driven gear is fixedly connected to the closing rotating shaft and meshes with the driving gear.

4. A bypass fast-cut switch according to claim 3, characterized in that: It also includes an indicating mechanism; the indicating mechanism includes an indicating rotating rod, a rotating rod cam and an indicating needle; The indicating rotating rod is vertically rotatably arranged on the table and is located on one side of the rotating shaft; The rotating shaft is provided with a first cam which is fixedly connected and is located above the driving gear; The first cam is provided with a sliding rod fixedly connected thereto; The rotating rod cam is horizontally fixedly arranged on the indicating rotating rod and is provided with a sliding groove adapted to the sliding rod; The indicating needle is fixedly arranged on the top of the indicating rotating rod, and the rotation indicating function of the indicating needle is realized by the movement of the sliding rod in the sliding groove.

5. A bypass fast-cut switch according to claim 1, characterized in that: The closing linear drive mechanism and the opening linear drive mechanism are respectively electromagnet telescopic rods.

6. A bypass fast-cut switch according to claim 1, characterized in that: The current and voltage secondary protection module includes a Va protection circuit and an IA protection circuit; The Va protection circuit includes a gas protection tube D3 and a sampling resistor R5 connected in parallel; The IA protection circuit includes a capacitor C1, a varistor R1, a varistor R2, a resistor R3, a resistor R4, a trigger diode Q1 and a trigger diode Q2; The first ends of the capacitor C1, the varistor R1, the varistor R2 and the trigger diode Q2 are electrically connected to the first input terminal IA respectively; The varistor R2 is connected in series with the resistor R3; The second ends of the capacitor C1, the varistor R1, the resistor R3 and the trigger diode Q2 are electrically connected to the second input terminal IN respectively; One end of the resistor R4 is connected between the varistor R2 and the resistor R3 , and the other end of the resistor R4 is electrically connected to the trigger diode Q2 through the trigger diode Q1 .

7. A bypass non-stop operation method, characterized in that: A bypass quick-cut switch comprising any one of claims 1 to 6, wherein two bypass quick-cut switches are provided, namely a 1# bypass quick-cut switch arranged between a 1# ring main unit and a 2# ring main unit, and a 2# bypass quick-cut switch arranged between a 2# ring main unit and a 3# ring main unit; The switches 3QF1 and 3QF2 in the 3# ring main unit and the switch 2QF2 in the 2# ring main unit are kept in the closed state; the 3# ring main unit provides the power for the normal operation of the 2# ring main unit; When planning maintenance or replacement of the 3# ring main unit, the following steps are performed: 1) Overlap bypass operation circuit: 1.1) The switch 2QF1 in the 2# ring main unit and the switch 1QF1 in the 1# ring main unit are in the split state respectively; 1.2) Electrically connect one end of the 1# bypass quick-cut switch to the switch 1QF1 in the 1# ring main unit, and the other end in series with the three-way connector; One of the three-way connectors is electrically connected to the backup interval switch 2QF1 of the 2# ring main unit, and the other is electrically connected to the 2# bypass quick-cut switch; 2) Bypass power supply reverse operation: 2.1) When the pressure detection of the 1# bypass quick-cut switch is in the on state, the switches 1QF1 and 2QF1 are closed, and the 2# ring main unit switch 2QF2 is disconnected; 2.2) After the pressure detection of the 1# bypass quick-cut switch detects that the voltage has changed from being on to being off, the 1# bypass quick-cut switch is quickly closed to restore the power supply to the 1# ring main unit; When the planned maintenance or replacement of the 3# ring main unit is completed, the operation sequence for restoring power supply to the 2# and 3# ring main units is as follows: 3) Overlap the bypass circuit to restore power supply: 3.1) Electrically connect the 2# bypass quick-cut switch to the switch 3QF3 of the 3# ring main unit; Switch 1QF1, switch 2QF1 and 1# bypass quick-cut switch are in the closed position respectively; Switch 2QF2, switch 3QF1 and switch 3QF3 are in split state respectively; The 2# bypass quick-cut switch is in the open position. 3.2) Electrically connect the 2# bypass quick-cut switch to the switch 3QF3 of the 3# ring main unit; 4) Restoring power supply: 4.1) Power supply restoration operation: Close switch 3QF2, and the power supply of 3# ring main unit is restored. Close switch 3QF3, and when voltage is detected on both sides of 2# bypass quick-cut switch, lock and close; The no-pressure detection function of the 1# bypass quick-cut switch is turned off, and the load side of the 2# bypass quick-cut switch changes from pressure to no pressure, and the switch is automatically closed to restore the power supply to the 2# ring main unit; 4.2) Dismantling of bypass operation loop: Close switch 2QF2 and switch 3QF1 respectively; set 1# bypass quick-cut switch, switch 2QF1 and switch 3QF3 to standby state respectively; then remove the bypass and complete the operation.

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