Permanent magnetic mechanism gas insulation ring main unit

Abstract

The utility model discloses a permanent magnetic mechanism gas insulation ring main unit, and relates to a permanent magnetic mechanism gas insulation ring main unit used for a high-voltage three-phase circuit system. The utility model aims to provide the permanent magnetic mechanism gas insulation ring main unit which is simple in structure, high in safety, high in controllability and high in automation degree. The permanent magnetic mechanism gas insulation ring main unit comprises a cabinet body, the upper side of the cabinet body is provided with a mechanism chamber, the mechanism chamber is sequentially provided with a magnetic attraction assembly, an insulation pull rod assembly, a vacuum arc-extinguishing chamber and a manual knife switch assembly from top to bottom, the magnetic attraction assembly is movably connected with the insulation pull rod assembly, the insulation pull rod assembly is fixedly connected with the vacuum arc-extinguishing chamber, and the manual knife switch assembly is fixedly connected with the vacuum arc-extinguishing chamber. The vacuum arc-extinguishing chamber is movably connected with the manual knife switch assembly, the lower side of the cabinet body is provided with a cable chamber used for being communicated with a circuit, and the cable chamber is electrically connected with the manual knife switch assembly.

Description

TECHNICAL FIELD

[0001] The utility model relates to a circuit system ring main unit, in particular to a permanent magnet mechanism gas insulation ring main unit for high voltage three -phase circuit system. BACKGROUND

[0002] In recent years, permanent magnet holding, electronic control electromagnetic operating mechanism (referred to as permanent magnet mechanism) for vacuum circuit breaker is concerned. Permanent magnet mechanism realizes the whole function of circuit breaker operating mechanism by the special combination of electromagnetic mechanism and permanent magnet, and the holding function of mechanism terminal position can be realized without traditional tripping and locking device, the number of parts is greatly reduced, and high reliability in machinery can be realized. Permanent magnet mechanism greatly reduces the dispersion and uncontrollability of action time due to few action components and few intermediate conversion and connection mechanisms, and provides a material basis for realizing intelligent operation of circuit breaker.

[0003] With the development of high voltage transmission technology, ordinary transmission voltage is generally 10-50KV, and the existing ring main unit directly realizes circuit breaker operating mechanism through a permanent magnet mechanism in the process of high voltage transmission, which is prone to safety hazards. In order to improve the safety of power distribution, a permanent magnet mechanism gas insulation ring main unit is needed. SUMMARY

[0004] The utility model provides a permanent magnet mechanism gas insulation ring main unit that has simple structure, high safety, strong controllability and high automation.

[0005] The utility model relates to a permanent magnet mechanism gas insulation ring main unit, which comprises a cabinet body, a mechanism chamber is arranged on the upper side of the cabinet body, a magnetic attraction assembly, an insulation pull rod assembly, a vacuum arc extinguishing chamber and a manual switch blade assembly are sequentially arranged in the mechanism chamber from top to bottom, the magnetic attraction assembly is movably connected with the insulation pull rod assembly, the insulation pull rod assembly is fixedly connected with the vacuum arc extinguishing chamber, the vacuum arc extinguishing chamber is movably connected with the manual switch blade assembly, a cable chamber for connecting circuits is arranged on the lower side of the cabinet body, and the cable chamber is electrically connected with the manual switch blade assembly.

[0006] The utility model relates to a permanent magnet mechanism gas insulation ring main unit, which comprises a cabinet body, a mechanism chamber is arranged on the upper side of the cabinet body, a magnetic attraction assembly, an insulation pull rod assembly, a vacuum arc extinguishing chamber and a manual switch blade assembly are sequentially arranged in the mechanism chamber from top to bottom, the magnetic attraction assembly is movably connected with the insulation pull rod assembly, the insulation pull rod assembly is fixedly connected with the vacuum arc extinguishing chamber, the vacuum arc extinguishing chamber is movably connected with the manual switch blade assembly, a cable chamber for connecting circuits is arranged on the lower side of the cabinet body, and the cable chamber is electrically connected with the manual switch blade assembly.

[0007] The utility model discloses a kind of permanent magnet mechanism gas insulation ring main unit, wherein the magnetic attraction subassembly includes shell, and coil and magnet being set in the inside of shell, the lower side of the magnet is provided with push rod, the push rod makes lifting movement under the action of magnetic force, the push rod is magnetically attracted on insulating pull rod subassembly.

[0008] The utility model discloses a kind of permanent magnet mechanism gas insulation ring main unit, wherein the insulating pull rod subassembly includes insulating rod body, first spring and second spring, vacuum bulb connector is fixedly arranged on the insulating rod body, the first spring is sleeved on the insulating rod body and one end thereof is fixedly connected with vacuum bulb connector, threaded disc is sleeved on the periphery of vacuum bulb connector, the second spring is sleeved on the first spring and one end thereof is fixedly connected with threaded disc, the push rod is magnetically attracted on the first spring and second spring, the insulating pull rod subassembly is fixedly connected with vacuum arc-extinguishing chamber, and the insulating rod body extends into vacuum arc-extinguishing chamber.

[0009] The utility model discloses a kind of permanent magnet mechanism gas insulation ring main unit, wherein the mechanism chamber is further provided with crossbar, and the vacuum arc-extinguishing chamber and insulating pull rod subassembly are fixed horizontally in the mechanism chamber by the crossbar.

[0010] The utility model discloses a kind of permanent magnet mechanism gas insulation ring main unit, wherein the manual knife switch subassembly includes drive shaft being horizontally set in mechanism chamber and being rotatably connected with mechanism chamber, the drive shaft is provided with a plurality of driving arms, one side of each driving arm is fixedly provided with one moving contact, the lower side of the vacuum arc-extinguishing chamber is provided with the connecting plate electrically connected with it, and the connecting plate is provided with the stationary contact for being electrically connected with moving contact.

[0011] The utility model discloses a kind of permanent magnet mechanism gas insulation ring main unit, wherein the manual knife switch subassembly is further provided with the base rotatably connected with moving contact, and the base is fixedly set on the inner wall of mechanism chamber, and the base is electrically connected with cable chamber.

[0012] The utility model discloses a kind of permanent magnet mechanism gas insulation ring main unit, wherein the mechanism chamber is further provided with the grounding contact matched with moving contact, and the grounding contact is arranged below moving contact.

[0013] The utility model discloses a kind of permanent magnet mechanism gas insulation ring main unit, wherein the permanent magnet mechanism gas insulation ring main unit is sealed and the inside is filled with SF6 gas for insulation.

[0014] The utility model discloses a kind of permanent magnet mechanism gas insulation ring main unit, wherein the insulating pull rod subassembly further includes insulating sleeve, and the insulating sleeve is sleeved on second spring.

[0015] The utility model relates to a kind of permanent magnet mechanism gas insulation ring main unit, which is different from prior art in that the utility model designs the cabinet body as upper and lower structure, the cable in lower cable chamber is electrically connected with the manual knife switch assembly and circuit system in upper mechanism chamber, the moving contact of manual knife switch assembly is controlled in upper mechanism chamber to make the static contact on vacuum arc-extinguishing chamber on-off, to control the circuit system in one level, then the on-off of contact in vacuum arc-extinguishing chamber is controlled by magnetic attraction assembly equipped with coil, magnet and lifting push rod under magnetic action, to control the circuit system in two levels, and the moving contact in manual knife switch assembly can also contact with grounding contact, to release residual charge in high-voltage circuit system, and the safety and stability of circuit system are ensured by three control states of manual knife switch assembly.

[0016] The utility model relates to a kind of permanent magnet mechanism gas insulation ring main unit, which at least includes the following beneficial effects:

[0017] (1) the special combination of electromagnetic mechanism, i.e. coil and permanent magnet, is used to realize the functions of breaker operating mechanism, without traditional trip and lockout device, to realize the function of maintaining mechanism terminal position, reduce parts, simplify structure, and enhance the safety and controllability of circuit system.

[0018] (2) the drive arm in manual knife switch assembly is driven by operating mechanism to control the circuit system in one level, and the circuit system is controlled in two levels by magnetic attraction assembly, to avoid the large current wear of magnetic attraction assembly, and enhance the automation and safety of circuit system.

[0019] (3) manual knife switch assembly has three control states, i.e. power on, grounding and double off, to meet different needs of circuit system.

[0020] The utility model will be further described below with reference to the drawings. DRAWINGS

[0021] Figure 1 It is the three-dimensional structure schematic diagram of the utility model one kind of permanent magnet mechanism gas insulation ring main unit;

[0022] Figure 2 It is the three-dimensional structure schematic diagram of the utility model Figure 1 A local enlarged view in it;

[0023] Figure 3 It is the three-dimensional structure schematic diagram of the utility model Figure 2 B local enlarged view in it;

[0024] Figure 4 It is the three-dimensional structure schematic diagram of the utility model insulation pull rod assembly hidden insulation sleeve Figure 1 ;

[0025] Figure 5The utility model discloses insulating pull rod assembly hides the three-dimensional structure diagram of insulating sleeve Figure 2 ;

[0026] Figure 6 The utility model discloses insulating pull rod assembly's three-dimensional structure diagram Figure 1 ;

[0027] Figure 7 The utility model discloses insulating pull rod assembly's three-dimensional structure diagram Figure 2 .

[0028] Figures:

[0029] 1-cabinet 1;2-mechanism room;3-magnetic attraction assembly;31-housing;32-coil;33-magnet;34-push rod;4-fixed rod;5-cross bar;6-insulating pull rod assembly;61-insulating rod body;62-first spring;63-vacuum bulb connector;64-threaded disc;65-second spring;66-insulating sleeve;7-vacuum arc-extinguishing chamber;8-connection plate;81-stationary contact;9-hand-operated disconnecting claw assembly;91-moving contact;92-ground contact;93-driving shaft;94-driving arm;95-base;10-cable chamber. DETAILED DESCRIPTION

[0030] As Figure 1 shown, the utility model discloses a kind of permanent-magnet mechanism gas-insulated ring main unit, including cabinet 1, mechanism room 2 is provided on the upper side of cabinet 1, mechanism room 2 is sequentially provided with magnetic attraction assembly 3, insulating pull rod assembly 6, vacuum arc-extinguishing chamber 7 and hand-operated disconnecting claw assembly 9 from top to bottom, magnetic attraction assembly 3 is movably connected with insulating pull rod assembly 6, insulating pull rod assembly 6 is fixedly connected with vacuum arc-extinguishing chamber 7, vacuum arc-extinguishing chamber 7 is movably connected with hand-operated disconnecting claw assembly 9, cable chamber 10 for intercommunication circuit is provided on the lower side of cabinet 1, cable chamber 10 is electrically connected with hand-operated disconnecting claw assembly 9.

[0031] Cabinet 1 is upper and lower structure, upper part is mechanism room 2 lower part is cable chamber 10, hand-operated disconnecting claw assembly 9 in mechanism room 2 is located just below vacuum arc-extinguishing chamber 7, by controlling the on-off of hand-operated disconnecting claw assembly 9 and vacuum arc-extinguishing chamber 7, realize the primary control of circuit system, magnetic attraction assembly 3 is located just above insulating pull rod assembly 6, insulating pull rod assembly 6 lower side is fixedly connected in vacuum arc-extinguishing chamber 7, by magnetic attraction assembly 3 control insulating pull rod assembly 6, in turn control the on-off of contact in vacuum arc-extinguishing chamber 7, realize the secondary control of circuit system, such design not only facilitate the connection of each component, and shorten its connection distance, in turn save mechanism room 2 space and reduce its volume, the cable in cable chamber 10 is electrically connected with hand-operated disconnecting claw assembly 9 in mechanism room 2 and is electrically connected with external circuit system, in turn realize the control of the whole circuit on-off through primary control and secondary control in mechanism room 2.

[0032] AsFigure 1 As shown, the mechanism chamber 2 is also provided with fixed rods 4, and the magnetic attraction assemblies 3 are provided with multiple, multiple magnetic attraction assemblies 3 are fixed horizontally in the mechanism chamber 2 through the fixed rods 4, and the insulation pull rod assemblies 6 and the vacuum arc-extinguishing chambers 7 are also provided with multiple, the magnetic attraction assemblies 3, the insulation pull rod assemblies 6 and the vacuum arc-extinguishing chambers 7 correspond one by one.

[0033] The fixed rods 4 are fixed at both ends on the inner walls of the left and right sides of the mechanism chamber 2, and the fixed rods 4 are horizontally arranged, multiple magnetic attraction assemblies 3 are uniformly fixed on the fixed rods 4 through buckles or bolts, to ensure that the two are firmly connected and do not tilt, and one insulation pull rod assembly 6 is arranged below each magnetic attraction assembly 3, and one vacuum arc-extinguishing chamber 7 is arranged below each insulation pull rod assembly 6, since the high-voltage circuit is multiple, the on-off of each circuit is controlled by setting multiple control assemblies.

[0034] As shown in the figure, Figure 2 The magnetic attraction assembly 3 includes a shell 31, and a coil 32 and a magnet 33 arranged inside the shell 31, the lower side of the magnet 33 is provided with a push rod 34, the push rod 34 makes lifting movement under the action of magnetic force, and the push rod 34 is magnetically attracted to the insulation pull rod assembly 6.

[0035] The external part of the magnetic attraction assembly 3 is the shell 31, the shell 31 is provided with the coil 32, i.e. the electromagnetic coil 32, the lower side of the coil 32 is fixed with the permanent magnet 33, and the lower side of the magnet 33 is the push rod 34, thereby forming an electromagnetic mechanism in which the push rod 34 can be lifted under the action of magnetic force, when the coil 32 is powered, due to the principle of electromagnetic induction, the coil 32 generates a magnetic field, and the generated magnetic field interacts with the magnet 33 below, under the action of magnetic force, the magnet 33 is pushed away from the coil 32, i.e. moves downward, since the push rod 34 is connected below the magnet 33, the downward movement of the magnet 33 will drive the push rod 34 to move downward together, similarly, when the coil 32 is powered with current in the opposite direction, the magnet 33 will be pushed towards the coil 32, i.e. moves upward, and the upward movement of the magnet 33 will drive the push rod 34 to move upward together. When the coil 32 is de-energized, the magnetism disappears, and the push rod 34 returns to the original position. During the movement, the push rod 34 is magnetized and has magnetism, and the push rod 34 is magnetically adsorbed on the insulation pull rod assembly 6, thereby driving the related parts of the insulation pull rod assembly 6 to move synchronously.

[0036] As shown in the figure, Figures 4-7As shown, the insulation pull rod assembly 6 comprises an insulation rod body 61, a first spring 62 and a second spring 65, the insulation rod body 61 is fixedly provided with a vacuum bulb connector 63, the first spring 62 is sleeved on the insulation rod body 61 and one end thereof is fixedly connected with the vacuum bulb connector 63, a threaded disc 64 is sleeved on the outer periphery of the vacuum bulb connector 63, the second spring 65 is sleeved on the first spring 62 and one end thereof is fixedly connected with the threaded disc 64, the push rod 34 is magnetically attracted on the first spring 62 and the second spring 65, the insulation pull rod assembly 6 is fixedly connected with the vacuum interrupter 7, that is, the insulation rod body 61 extends into the vacuum interrupter 7 and is fixedly connected with the moving contact in the vacuum interrupter 7.

[0037] The insulation rod body 61 is cylindrical, the vacuum bulb connector 63 is firmly sleeved in the middle of the insulation rod body 61, the lower surface of the vacuum bulb connector 63 is firmly connected with the first spring 62, the upper end of the second spring 65 is firmly connected with the threaded disc 64, the threaded disc 64 is firmly sleeved on the vacuum bulb connector 63, the lower end of the second spring 65 is flush with the lower end of the first spring 62, the first spring 62, the second spring 65 and the insulation rod body 61 keep the same central axis, the double-spring arrangement not only improves the stability and reliability of the push rod 34, but also significantly increases the pushing force of the push rod 34 through the synergistic effect of the two springs, the vacuum bulb connector 63 is used for force transmission on one hand, such as Figure 3 As shown, when the push rod 34 is magnetically attracted on the upper ends of the two springs and pushes the springs downward, the first spring 62 pushes the vacuum bulb connector 63, the second spring 65 pushes the threaded disc 64, the threaded disc 64 pushes the vacuum bulb connector 63, and then the vacuum bulb connector 63 transmits the force to the insulation rod body 61; on the other hand, it plays a buffering role, during the movement of the moving contact in the vacuum interrupter 7, especially when the circuit is rapidly opened or closed, a certain mechanical impact will be generated, the vacuum bulb connector 63 can buffer this impact and prolong the service life of the vacuum bulb connector 63 and the entire circuit equipment; on the other hand, the sealing property is used to maintain the vacuum environment of the vacuum interrupter 7.

[0038] The threaded disc 64 is externally threadedly connected with a nest, the two are firmly connected through threads, the outer wall of the nest is provided with a clamping groove, the inner wall of the insulation sleeve 66 is provided with a clamping block matched with the clamping groove, the insulation sleeve 66 is in a cylindrical structure, the upper end thereof is firmly clamped on the nest and forms a sealing effect, and the lower end wraps the threaded disc 64 and the second spring 65 inside, that is, the insulation sleeve 66 is sleeved on the second spring 65, the insulation sleeve 66 is made of special material and has sufficient toughness and certain hardness, the material thereof is not limited herein, the internal components are protected from damage by the insulation sleeve 66, and the internal components are insulated from the outside. The lower end of the insulation sleeve 66 is provided with a connecting hole for the insertion of the push rod 34, the connecting hole is on the same straight line as the central axis of the first spring 62, the second spring 65 and the insulation rod body 61, so as to ensure that the pushing force of the push rod 34 is transmitted along a straight line.

[0039] As shown in Figure 3 , in operation, the magnetic assembly 3 is powered, the push rod 34 is magnetically attracted to the two spring upper ends and is pushed downward, and the two springs are deformed, and the vacuum bulb connector 63 is squeezed, and the insulating rod body 61 is pushed downward, and the moving contact in the vacuum interrupter 7 is pushed downward by the insulating rod body 61 until it is in full contact with the stationary contact in the vacuum interrupter 7, realizing circuit connection of the circuit system. Similarly, the magnetic assembly 3 is powered with opposite current, the push rod 34 pulls the two springs upward, and the moving contact in the vacuum interrupter 7 is disconnected from the stationary contact through the insulating rod body 61, and the circuit system is disconnected, realizing two-level control of the circuit system.

[0040] It should be noted that the moving contact and the stationary contact in the vacuum interrupter 7 are different from the moving contact 91 and the stationary contact 81 in the subsequent manual knife switch assembly 9, which is specifically described here.

[0041] It should also be noted that the first spring 62 and the second spring 65 are overtravel springs, which have the following characteristics:

[0042] The first spring 62 has the following elastic characteristics: when it is compressed or stretched by the push rod 34, it can store elastic potential energy and return to its original shape after the external force disappears, thereby increasing the pushing or pulling force.

[0043] Overtravel compensation characteristic: when the moving contact and the stationary contact are in contact, the moving contact continues to move due to the elastic action of the spring, which plays an overtravel compensation role. When the moving contact is caused to have a small overtravel due to wear and other reasons, the first spring 62 can still ensure that there is enough contact pressure between the moving contact and the stationary contact by deforming elastically, so that the circuit can run stably.

[0044] Pressure regulation characteristic: the first spring 62 can adjust the contact pressure between the moving contact and the stationary contact, which can reduce the contact resistance and heat generation, and also can ensure that the contacts will not separate when a large current passes through.

[0045] In addition to the above common characteristics, the second spring 65 also has the characteristics of small size and strong coordination. It can not only reduce the size of the insulating rod body 61, but also adjust its elastic deformation according to the displacement of the insulating rod body 61 and the state of the first spring 62 when it is used with the first spring 62, so as to realize dynamic balance with other components and jointly ensure the correct action and contact between the moving contact and the stationary contact.

[0046] As shown in Figure 1 , the mechanism chamber 2 is also provided with a crossbar 5, and the vacuum interrupter 7 and the insulating pull rod assembly 6 are horizontally fixed in the mechanism chamber 2 through the crossbar 5.

[0047] The horizontal rod 5 is parallel to the fixed rod 4, and both ends are fixed on the inner walls of the mechanism chamber 2 on the left and right sides. The horizontal rod 5 is provided with a plurality of fixed plates, and each vacuum interrupter 7 is firmly supported in the mechanism chamber 2 by two fixed plates. During operation, it ensures stable operation and does not tilt or loosen.

[0048] As shown in Figure 2 , the manual knife switch assembly 9 includes a drive shaft 93 horizontally arranged in the mechanism chamber 2 and rotationally connected with the mechanism chamber 2. The drive shaft 93 is provided with a plurality of drive arms 94, and each drive arm 94 is fixedly provided with a moving contact 91 on one side. The lower side of the vacuum interrupter 7 is provided with a connecting plate 8 electrically connected thereto, and the connecting plate 8 is provided with a stationary contact 81 for electrical connection with the moving contact 91.

[0049] The mechanism chamber 2 is provided with vertical fixed plates at the left and right ends. The drive shaft 93 is provided with bearings on the left and right fixed plates and is parallel to the horizontal rod 5. The drive arms 94 on the drive shaft 93 correspond to the vacuum interrupters 7 one by one. The moving contact 91 is arranged on the left side or right side of the drive arm 94, corresponding to the stationary contact 81 on the connecting plate 8 below the vacuum interrupter 7. In this way, when the operating mechanism actuates the drive arm 94, the drive shaft 93 rotates synchronously with the drive arm 94, controls the moving contact 91 to contact or disconnect the stationary contact 81, and realizes one-level control of the circuit system. Through two-level control of the circuit system, the safety of the construction personnel and the stability of the circuit system are ensured.

[0050] As shown in Figure 1 , the mechanism chamber 2 is also provided with a grounding contact 92 cooperating with the moving contact 91, and the grounding contact 92 is arranged below the moving contact 91.

[0051] Each moving contact 91 is also provided with a grounding contact 92 below. When the circuit system needs to be repaired, the moving contact 91 in the two-level control of the circuit system is disconnected from the stationary contact 81 by actuating the drive arm 94, and then the moving contact 91 is connected with the grounding contact 92. In this way, the residual charge in the circuit system can be released, and the personal safety of the repair worker is ensured.

[0052] The manual knife switch assembly 9 has three control states, namely: power on, grounding and double disconnection. According to the needs, the corresponding operation can be carried out.

[0053] As shown in Figure 2 , the manual knife switch assembly 9 is also provided with a base 95 rotationally connected with the moving contact 91. The base 95 is fixedly arranged on the inner wall of the mechanism chamber 2, and the base 95 is electrically connected with the cable chamber 10.

[0054] Each mobile contact 91 is provided with a base 95, which is fixed on the inner wall of the rear side of the mechanism chamber 2 and is rotatably connected with the mobile contact 91 through a lock pin. The base 95 not only strengthens the stability and firmness of the mobile contact 91, but also is fixedly installed in the contact shell. The driving arm 94 includes a driving rod and an arc-shaped plate. The driving rod is sleeved on the driving shaft 93 and rotates synchronously with the driving shaft 93. One end of the arc-shaped plate is rotatably connected with the driving rod through a lock pin. Similarly, the other end is rotatably connected with the contact shell on which the mobile contact 91 is installed. Thus, a four-bar linkage structure is formed. When the driving shaft 93 drives the driving arm 94 to rotate, the driving rod drives the arc-shaped plate to rotate, and the relative position between them is adjusted through the lock pin. Similarly, the arc-shaped plate drives the contact shell to rotate, and the position is also adjusted through the lock pin. Then, the mobile contact 91 is driven to rotate. While the mobile contact 91 rotates, its position is adjusted through the fixed base 95, so as to be in contact with the stationary contact 81 and the grounding contact 92. The purpose of the on-off and grounding of the circuit system is achieved.

[0055] As shown in Figure 1 Figure 2 , the mechanism chamber 2 is sealed and filled with SF6 gas for insulation.

[0056] The mechanism chamber 2 is sealed by welding to ensure its sealing. The mechanism chamber 2 is filled with SF6 gas. Under the condition of power supply, high-voltage arc may be generated when each component is powered on, and the high-voltage arc may cause a fire. If the high-voltage arc is not completely released, the worker may be injured by the high-voltage arc when repairing the circuit system. The SF6 gas is not flammable, not explosive, and has excellent electrical insulation and arc extinguishing properties. Therefore, the mechanism chamber 2 is insulated and protected, the stability of each component in the mechanism chamber 2 is ensured, and the safety and stability of the circuit system are ensured. Moreover, the SF6 gas reduces the insulation distance between the mobile contact 91 and the cabinet 1. Therefore, the cabinet 1 can be made smaller, and the use effect is better.

[0057] Working principle: The cables in the cable chamber 10 are connected with external circuits. The on-off of the circuit system is controlled through primary control and secondary control in the mechanism chamber 2. When power supply is needed, the driving arm 94 is operated to drive the mobile contact 91 to rotate through the driving shaft 93, so that the mobile contact 91 is in complete contact with the stationary contact 81 below the vacuum arc-extinguishing chamber 7. At this time, the circuit system is connected in primary. Then, the magnetic assembly 3 is powered on. The magnetic property of the push rod 34 is generated and is magnetically attracted to the upper ends of the first spring 62 and the second spring 65 and moves downward, thereby compressing the two springs. The insulating rod body 61 moves downward under the action of the push rod 34 and the two springs, thereby pushing the movable contact in the vacuum arc-extinguishing chamber 7 to move downward until it is in complete contact with the stationary contact in the vacuum arc-extinguishing chamber 7. At this time, the circuit system is connected in secondary. When the secondary connection is completed, the entire circuit system is powered on.

[0058] When power needs to be cut off, similarly, first pass the opposite direction current to the magnetic attraction assembly 3, under the magnetic force, push the rod 34 to move upward, and then stretch the first spring 62 and the second spring 65, the insulating rod body 61 moves upward under the action of the push rod 34 and the two springs, and then pull the moving contact in the vacuum interrupter 7 to move upward until completely separated from the stationary contact in the vacuum interrupter 7, at this time the circuit system is disconnected in two stages, when the two-stage disconnection, the entire circuit system is powered off; then through the operating mechanism to dial the driving arm 94, the driving arm 94 drives the moving contact 91 to rotate through the driving shaft 93, so that the moving contact 91 is disconnected with the stationary contact 81 below the vacuum interrupter 7, at this time the circuit system is disconnected in one stage, ensuring the safety of the circuit system.

[0059] When the circuit needs to be repaired, dial the driving arm 94 through the operating mechanism, so that the moving contact 91 is in complete contact with the ground contact 92 below it, and the residual charge in the circuit system is completely discharged, then the worker repairs the circuit system, after the repair is completed, if power supply is needed, dial the driving arm 94 through the operating mechanism, and power on the magnetic attraction assembly 3, complete one-stage communication and two-stage communication, and restore power supply.

[0060] It should be noted that the terms "center", "upper", "lower", "front", "rear", "left", "right", "middle" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0061] In the description of the present application, it should be noted that unless otherwise specified and limited, the terms "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0062] The above-described embodiments are only preferred embodiments of the present application, and do not limit the scope of the present application, and various modifications and improvements of the technical solutions of the present application made by those skilled in the art without departing from the design spirit of the present application shall fall within the protection scope of the present application.

Claims

1. A permanent magnet mechanism gas insulated ring main unit, comprising a cabinet body, characterized in that: The upper side of the cabinet is provided with a mechanism chamber, the mechanism chamber is sequentially provided with a magnetic attraction assembly, an insulating pull rod assembly, a vacuum arc-extinguishing chamber and a manual switch blade assembly from top to bottom, the magnetic attraction assembly is movably connected with the insulating pull rod assembly, the insulating pull rod assembly is fixedly connected with the vacuum arc-extinguishing chamber, the vacuum arc-extinguishing chamber is movably connected with the manual switch blade assembly, and the lower side of the cabinet is provided with a cable chamber for communicating with a circuit, and the cable chamber is electrically connected with the manual switch blade assembly.

2. The gas insulated ring main unit with permanent magnetic mechanism according to claim 1, characterized in that: The mechanism chamber is also provided with a fixing rod, a plurality of magnetic attraction assemblies are horizontally fixed in the mechanism chamber through the fixing rod, and the insulating pull rod assembly and the vacuum arc-extinguishing chamber are also provided with a plurality of magnetic attraction assemblies, insulating pull rod assemblies and vacuum arc-extinguishing chambers.

3. The gas insulated ring main unit with permanent magnetic mechanism according to claim 2, characterized in that: The magnetic attraction assembly comprises a shell, a coil and a magnet arranged on the inner side of the shell, the lower side of the magnet is provided with a push rod, the push rod moves up and down under the action of magnetic force, and the push rod is magnetically attracted to the insulating pull rod assembly.

4. The gas insulated ring main unit with permanent magnet mechanism according to claim 3, characterized in that: The insulating pull rod assembly comprises an insulating rod body, a first spring and a second spring, a vacuum bulb connector is fixedly arranged on the insulating rod body, the first spring is sleeved on the insulating rod body and one end of the first spring is fixedly connected with the vacuum bulb connector, a threaded disc is sleeved on the outer periphery of the vacuum bulb connector, the second spring is sleeved on the first spring and one end of the second spring is fixedly connected with the threaded disc, the push rod is magnetically attracted to the first spring and the second spring, the insulating pull rod assembly is fixedly connected with the vacuum arc-extinguishing chamber, and the insulating rod body extends into the vacuum arc-extinguishing chamber.

5. The gas insulated ring main unit with permanent magnet mechanism according to claim 4, characterized in that: The mechanism chamber is also provided with a cross rod, and the vacuum arc-extinguishing chamber and the insulating pull rod assembly are horizontally fixed in the mechanism chamber through the cross rod.

6. The gas insulated ring main unit of claim 5, wherein: The manual switch blade assembly comprises a driving shaft horizontally arranged in the mechanism chamber and rotatably connected with the mechanism chamber, a plurality of driving arms are arranged on the driving shaft, one moving contact is fixedly arranged on one side of each driving arm, a connecting plate electrically connected with the vacuum arc-extinguishing chamber is arranged on the lower side of the vacuum arc-extinguishing chamber, and a stationary contact for electrically connecting with the moving contact is arranged on the connecting plate.

7. The gas insulated ring main unit of claim 6, characterized in that: The manual switch blade assembly is also provided with a base rotatably connected with the moving contact, the base is fixedly arranged on the inner wall of the mechanism chamber, and the base is electrically connected with the cable chamber.

8. The gas insulated ring main unit with permanent magnet mechanism according to claim 7, characterized in that: The mechanism chamber is also provided with a grounding contact matched with the moving contact, and the grounding contact is arranged below the moving contact.

9. The gas insulated ring main unit of claim 8, characterized in that: The mechanism chamber is sealed and filled with SF6 gas for insulation.

10. The gas insulated ring main unit of claim 9, characterized in that: The insulating pull rod assembly also comprises an insulating sleeve, and the insulating sleeve is sleeved on the second spring.

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