CN215771055U

CN215771055U - Compound fling-cut switch of condenser and condenser compensating unit

Info

Publication number: CN215771055U
Application number: CN202121877042.5U
Authority: CN
Inventors: 潘新华; 张中印; 崔中华; 翟淑慧
Original assignee: Beijing Brile Intelligent Technology Zhoukou Co ltd
Current assignee: Beijing Brile Intelligent Technology Zhoukou Co ltd
Priority date: 2021-08-10
Filing date: 2021-08-10
Publication date: 2022-02-08
Anticipated expiration: 2031-08-10

Abstract

The application relates to electrical equipment, in particular to a composite fling-cut switch of a capacitor and a capacitor compensation unit, which have the technical scheme that the composite fling-cut switch is arranged in an oil tank, and the oil tank is communicated with an oil inlet pipe; the oil tank comprises an installation bottom plate arranged in an oil tank, an oil switch, a vacuum switch and a movable end impactor, wherein the oil switch and the vacuum switch are arranged on the installation bottom plate; the oil switch and the vacuum switch are connected in series; when the composite fling-cut switch is switched on, the movable end impactor enables the oil switch to be switched on firstly, and then enables the vacuum switch to be switched on within preset time; when the composite fling-cut switch is opened, the moving end impactor enables the vacuum switch to be opened firstly, and then enables the oil switch to be opened within a preset time; the design plays a role in separating the brake of the compound switching switch, firstly separating the brake of the vacuum switch, then separating the brake of the oil switch after a preset time interval, and because the circuit is disconnected by the vacuum switch, the oil switch can not generate electric arcs at the moment, thereby achieving the purpose of maintenance-free.

Description

Compound fling-cut switch of condenser and condenser compensating unit

Technical Field

The application relates to electrical equipment, in particular to a capacitor composite fling-cut switch and a capacitor compensation unit.

Background

At present, a vacuum contactor and a vacuum circuit breaker are mostly adopted for switching a 10kV system capacitor, but the two types of vacuum switches are easy to reignite a contact in a specific time after being switched off, the contact reignites to generate overvoltage, the overvoltage can bring serious harm to power equipment, the service life of the capacitor can be shortened, and even the risk of explosion can occur.

In the process of switching the capacitor bank by using the oil switch, the phenomenon of re-ignition cannot occur, but the insulating oil is carbonized by electric arc generated when the capacitor is cut off, so that the oil switch needs to be regularly maintained, and the maintenance cost is high, so that the oil switch is gradually not suitable for most maintenance-free occasions.

SUMMERY OF THE UTILITY MODEL

In order to prevent the fling-cut switch from reigniting and generating electric arcs, the application provides a capacitor composite fling-cut switch and a capacitor compensation unit.

The application provides a compound fling-cut switch of condenser adopts following technical scheme:

a composite fling-cut switch of a capacitor is arranged in an oil tank, and the oil tank is communicated with an oil inlet pipe; the oil tank comprises an installation bottom plate arranged in an oil tank, an oil switch, a vacuum switch and a movable end impactor, wherein the oil switch and the vacuum switch are arranged on the installation bottom plate; the oil switch and the vacuum switch are connected in series;

when the composite fling-cut switch is switched on, the movable end impactor enables the oil switch to be switched on firstly, and then enables the vacuum switch to be switched on within preset time;

when the composite fling-cut switch is opened, the moving end impactor enables the vacuum switch to be opened firstly, and then enables the oil switch to be opened within a preset time.

By adopting the technical scheme, before the composite fling-cut switch is switched on and off, an operator fills a certain amount of insulating oil into the oil tank by using the oil inlet pipe, so that the oil switch and the vacuum switch can be soaked in the insulating oil; when the composite fling-cut switch is switched on, the movable end impactor enables the oil switch to be switched on firstly, and then enables the vacuum switch to be switched on within preset time; when the composite fling-cut switch is opened, the moving end impactor enables the vacuum switch to be opened firstly, and then enables the oil switch to be opened within a preset time; the design plays a role in separating the brake of the compound fling-cut switch, firstly separating the brake of the vacuum switch, then finishing the arc extinguishing of the vacuum switch in the vacuum tube, and then separating the brake of the oil switch after a preset time interval, because the circuit is disconnected by the vacuum switch, the oil switch can not generate electric arc, thereby avoiding the possibility that the insulating oil is carbonized due to high-temperature electric arc, and further achieving the purpose of no maintenance; meanwhile, an isolation port is formed by disconnecting the first switch, and the vacuum switch and the oil switch are connected in series, so that one end of the vacuum tube is suspended, the recovery voltage at the two ends of the vacuum tube is not enough to cause the vacuum switch to be re-ignited, and the purpose that the fling-cut switch does not re-ignite is achieved.

Preferably, the oil switch comprises a first fixed contact arranged on the mounting base plate, a second fixed contact arranged on one side of the first fixed contact, and a first movable contact which is in sliding connection with the mounting base plate along the direction of extension lines of the first fixed contact and the second fixed contact, the first movable contact is in sliding connection with the first fixed contact and the second fixed contact, and the first movable contact is fixedly connected with the moving end striker; the vacuum switch comprises a vacuum tube arranged on one side of the second fixed contact, a third fixed contact arranged in the vacuum tube and a second movable contact arranged on one side of the third fixed contact, which is close to the first movable contact; the first fixed contact is connected with the wiring terminal, the second fixed contact is connected with the second moving contact, and the third fixed contact is connected with the other wiring terminal; the moving end striker is connected with the first moving contact, and a connecting line of the moving end striker and the second moving contact is parallel to the sliding direction of the first moving contact; the time length spent for realizing the connection of the first moving contact, the first fixed contact and the second fixed contact is less than the time length spent for realizing the connection of the second moving contact and the third fixed contact.

By adopting the technical scheme, when the composite fling-cut switch is opened, firstly, the moving end striker is separated from the second moving contact, so that the vacuum switch is opened; meanwhile, the time length spent for realizing the connection of the first moving contact with the first fixed contact and the second fixed contact is less than the time length spent for realizing the connection of the second moving contact with the third fixed contact, so that the first moving contact can be separated from the second fixed contact after a period of time, and the oil switch is switched off; the design realizes the interval brake separation of the oil switch and the vacuum switch, thereby avoiding the possibility that the oil switch generates electric arc and the vacuum switch is re-ignited, and achieving the purposes of no maintenance and no re-ignition.

Preferably, the device also comprises a fixing frame arranged on one side of the vacuum tube close to the moving-end impactor; the second moving contact comprises a moving end conducting rod extending into the fixed frame; the vacuum switch also comprises a first connecting rod, a contact piece, a first conducting strip and a reset spring, wherein the first connecting rod is arranged at one end, far away from the third fixed contact, of the movable end conducting rod and is connected with the movable end conducting rod; and a space is reserved between the contact piece and the fixing frame.

By adopting the technical scheme, when the vacuum switch is switched on, the moving end impactor moves towards the direction close to the fixed frame, and along with the movement of the moving end impactor, the contact piece overcomes the elastic force of the reset spring and moves towards the direction close to the fixed frame, and at the moment, the moving end conducting rod also moves towards the direction close to the third fixed contact; when the contact piece is attached to the fixed frame, the movable end conducting rod is also connected with the third fixed contact, so that the vacuum switch is switched on; when the vacuum switch is switched off, the moving end impactor moves towards the direction far away from the fixed frame, along with the movement of the moving end impactor, the reset spring drives the conducting strip to move towards the direction close to the contact piece under the action of the reset spring until the moving end conducting rod is separated from the third static contact, and therefore the vacuum switch is switched off.

Preferably, the movable end striker comprises a limiting frame arranged on the mounting base plate, two striking pieces arranged in the limiting frame and symmetrically arranged along the central line of the limiting frame, and a first buffer spring arranged between the two striking pieces; the impact piece comprises a connecting shaft which is connected to the limiting frame in a sliding manner, impact sheets which are fixedly connected to two ends of the connecting shaft and a limiting shaft which is fixedly connected to the end face, far away from the connecting shaft, of the impact sheet in the limiting frame, and the buffer spring is sleeved on the limiting shaft and is abutted against the impact sheets; the extending direction of the connecting shaft is parallel to the sliding direction of the first moving contact.

By adopting the technical scheme, when the vacuum switch is switched on, the moving end impactor moves towards the direction close to the contact piece, the impact piece close to the contact piece can be in collision fit with the contact piece along with the movement of the moving end impactor, and the vacuum switch can be switched on only after the contact piece is fitted with the side face of the fixed frame; the design ensures that the collision between the impact sheet and the contact sheet is elastic collision, avoids the possibility that the collision between the impact sheet and the contact sheet is rigid collision, and ensures the effective service life of the impact sheet and the contact sheet; meanwhile, after the contact piece is impacted by the passive end impactor, when the travel distance of the electromagnet is smaller than the travel distance of the vacuum tube and the deformation travel distance of the first buffer spring, the electromagnet can normally act in place through the deformation of the first buffer spring, the possibility that the electromagnet does not act in place after the contact piece is attached to the side face of the fixing frame is avoided, and the normal development of subsequent operation is ensured.

Preferably, the first moving contact comprises a fixed sheet arranged on the mounting base plate, a second conductive sheet arranged on two sides of the fixed sheet and connected with the first fixed contact and the second fixed contact in a sliding manner, and a fixed member penetrating through the fixed sheet and the second conductive sheet; the fixing piece comprises a second connecting rod penetrating through the fixing piece and the two second conducting pieces, an attaching piece arranged on one side of the second conducting pieces far away from the fixing piece and fixedly connected with the second connecting rod, a blocking piece arranged on one side of the other second conducting piece far away from the fixing piece and in threaded connection with the second connecting rod, and a second buffer spring arranged between the blocking piece and the second conducting pieces; the attaching sheet is attached to the second conductive sheet.

By adopting the technical scheme, after the salient point exists at the position where the first static contact or the second static contact is contacted with the second conducting strip, the arranged second buffer spring is convenient for enabling the two second conducting strips to slightly move towards the direction away from each other, so that the first moving contact can be more smoothly in sliding connection with the first static contact and the second static contact.

Preferably, the device also comprises a movable end insulator which is arranged on the mounting bottom plate and is in sliding connection with the mounting bottom plate; the first moving contact is arranged on the moving end insulator, and the moving end impactor is arranged on the moving end insulator.

Through adopting above-mentioned technical scheme, the possibility of having avoided oil switch and moving end impinger direct and mounting plate contact of setting to the possibility of emergence electric leakage has been reduced. The safety of the operation is improved.

Preferably, the device also comprises an electromagnet arranged on the mounting bottom plate and a transmission plate which is arranged on one side of the electromagnet and is fixedly connected with the electromagnet; one side of the oil tank is provided with a controller; the moving end insulator is fixedly connected with the transmission plate; the controller is electrically connected with the electromagnet.

By adopting the technical scheme, when the composite fling-cut switch is switched on, the controller sends a switching-on signal to the electromagnet, the electromagnet drives the transmission plate to move towards the direction close to the electromagnet, the transmission plate drives the movable end insulator to move towards the direction close to the electromagnet, and the movable end insulator drives the movable end impactor to move towards the direction close to the electromagnet, so that switching-on is realized; when the compound fling-cut switch is opened, the controller issues the signal of opening to the electro-magnet, and the electro-magnet drives the driving plate and removes to the direction of keeping away from the electro-magnet, and the driving plate drives and moves end insulator and move the end impinger and remove to the direction of keeping away from the electro-magnet, and then realizes opening.

Preferably, the sliding block is fixedly connected to the end face, close to the mounting base plate, of the movable end insulator, and a sliding groove for sliding the sliding block is formed in the end face, close to the movable end insulator, of the mounting base plate.

By adopting the technical scheme, the possibility that the movable end insulator is in direct contact with the mounting bottom plate is avoided by the arranged slide block and the arranged slide groove, so that the movable end insulator can slide more smoothly.

Preferably, the fixed contact device further comprises a fixed end insulator fixedly connected to the mounting base plate, and the first fixed contact, the second fixed contact and the fixed frame are fixedly connected with the fixed end insulator; the upper cover of the oil inlet pipe is provided with a secondary wire outlet cover and a secondary sealing terminal arranged in the oil tank; the controller is electrically connected with the secondary sealing terminal, and the electromagnet is electrically connected with the secondary sealing terminal; the secondary outlet cover is provided with a waterproof connector for secondary outlet, and the waterproof connector for secondary outlet is electrically connected with the secondary sealing terminal.

By adopting the technical scheme, the arranged secondary sealing terminal plays a role in transition and integration, the possibility that various electrical elements are electrically connected with the controller independently is avoided, and the convenience of connection operation is improved; the secondary that sets up is qualified for the next round of competitions and is used water joint to reduce the possibility that external impurity drops in the oil tank, has guaranteed the cleanliness of insulating oil in the oil tank.

The application also provides a capacitor compensation unit, which comprises the capacitor compound switching switch as claimed in any one of claims 1 to 9, a protection current transformer arranged on the oil tank and connected with the capacitor compound switching switch, and a reactor arranged above the protection current transformer and cast with the protection current transformer into a whole.

By adopting the technical scheme, the arranged protection current transformer plays a role in current limiting, and the safety of the whole compensation unit is ensured; the reactor is convenient for providing signals for electrical elements and cutting off a fault circuit when faults such as short circuit, overload and the like occur in a loop, so that the safety of the whole compensation unit is protected.

In summary, the present application has the following technical effects:

1. the oil switch, the vacuum switch and the moving end impactor are arranged to play a role in separating the brake of the composite fling-cut switch, firstly separating the brake of the vacuum switch, finishing arc extinction of the vacuum switch in the vacuum tube at the moment, then separating the brake of the oil switch after a preset time interval, and because the circuit is disconnected by the vacuum switch at the moment, the oil switch cannot generate electric arc at the moment, so that the possibility that the insulating oil is carbonized due to high-temperature electric arc is avoided, and the purpose of maintenance-free is achieved; meanwhile, an isolation port is formed by disconnecting the first switch, and the vacuum switch and the oil switch are connected in series, so that one end of the vacuum tube is suspended, the recovery voltage at the two ends of the vacuum tube is not enough to cause the vacuum switch to be re-ignited, and the purpose that the fling-cut switch does not re-ignite is achieved;

2. when the composite fling-cut switch is opened, firstly, the moving end striker is separated from the second moving contact, so that the vacuum switch is opened; meanwhile, the time length spent for realizing the connection of the first moving contact with the first fixed contact and the second fixed contact is less than the time length spent for realizing the connection of the second moving contact with the third fixed contact, so that the first moving contact can be separated from the second fixed contact after a period of time, and the oil switch is switched off; the design realizes the interval brake separation of the oil switch and the vacuum switch, thereby avoiding the possibility that the oil switch generates electric arc and the vacuum switch is re-ignited, and achieving the purposes of no maintenance and no re-ignition;

3. when the vacuum switch is switched on, the moving end impactor moves towards the direction close to the contact piece, the impact piece close to the contact piece can be in collision fit with the contact piece along with the movement of the moving end impactor, and the vacuum switch can be switched on only after the contact piece is fitted with the side face of the fixed frame; the design ensures that the collision between the impact sheet and the contact sheet is elastic collision, avoids the possibility that the collision between the impact sheet and the contact sheet is rigid collision, and ensures the effective service life of the impact sheet and the contact sheet; meanwhile, after the contact piece is impacted by the passive end impactor, when the travel distance of the electromagnet is smaller than the travel distance of the vacuum tube and the deformation travel distance of the first buffer spring, the electromagnet can normally act in place through the deformation of the first buffer spring, the possibility that the electromagnet does not act in place after the contact piece is attached to the side face of the fixing frame is avoided, and the normal development of subsequent operation is ensured.

Drawings

FIG. 1 is a schematic structural diagram of a capacitor compensation unit according to an embodiment of the present disclosure after a cover plate is hidden;

FIG. 2 is an enlarged schematic view of the protective current transformer of FIG. 1;

FIG. 3 is a schematic structural diagram of another view angle after the capacitor compensation unit hides the cover plate in the embodiment of the present application;

FIG. 4 is a partial front view of a composite fling-cut switch of a capacitor in an embodiment of the present application;

fig. 5 is a partial bottom view highlighting a positional relationship of a second movable contact and a movable end striker in an embodiment of the present application;

FIG. 6 is an enlarged schematic view at B in FIG. 5;

fig. 7 is a partial side view highlighting a capacitor compound-switching switch in an embodiment of the present application.

In the figure, 1, a fuel tank; 2. protecting the current transformer; 3. a reactor; 4. mounting a bottom plate; 5. an electromagnet; 6. a drive plate; 7. a moving end insulator; 8. a stationary end insulator; 9. an oil switch; 91. a first moving contact; 911. a fixing sheet; 912. a second conductive sheet; 913. a fixing member; 9131. a second connecting rod; 9132. a bonding sheet; 9133. a barrier sheet; 9134. a second buffer spring; 92. a first fixed contact; 93. a second fixed contact; 10. a vacuum switch; 101. a vacuum tube; 102. a third static contact; 103. a second moving contact; 1031. a movable end conducting rod; 104. a first connecting rod; 105. a contact piece; 106. a first conductive sheet; 107. a return spring; 11. a moving end impactor; 111. defining a frame; 112. a striker; 1121. a connecting shaft; 1122. a striking plate; 1123. defining an axis; 113. a first buffer spring; 12. a fixing frame; 13. A secondary wire outlet cover; 131. the secondary outlet is with the water joint; 14. an oil inlet pipe; 15. a secondary sealing terminal; 16. an ear plate; 17. a travel switch.

Detailed Description

The present application is described in further detail below with reference to the attached drawings.

Referring to fig. 1 and 2, the application provides a capacitor compensation unit, which includes a vertically arranged oil tank 1, a capacitor composite switching switch arranged in the oil tank 1, a protection current transformer 2 fixedly connected to the upper end surface of the oil tank 1 and electrically connected with the capacitor composite switching switch, and a reactor 3 arranged above the protection current transformer 2 and integrally cast with the protection current transformer 2, wherein the upper end surface of the oil tank 1 is communicated with a vertical oil inlet pipe 14, and the upper end of the oil inlet pipe 14 is provided with a bolt with a sealing ring; one end of the protection current transformer 2 extends into the oil tank 1, and a sealing ring is arranged between the protection current transformer 2 and the oil tank 1; two side surfaces of the oil tank 1 are fixedly connected with lug plates 16.

The arranged protection current transformer 2 plays a role in current limiting, and the safety of the whole compensation unit is ensured; the reactor 3 is arranged so as to provide signals to electrical elements and cut off a fault circuit when faults such as short circuit, overload and the like occur in a loop, thereby playing a role in protecting the safety of the whole compensation unit; the arranged sealing ring reduces the possibility that the insulating oil in the oil tank 1 seeps outwards on one hand, and reduces the possibility that the insulating oil in the oil tank 1 becomes dirty due to the fact that external impurities enter the oil tank 1 on the other hand, thereby avoiding the possibility that the insulating oil needs to be replaced; the lug plate 16 is arranged to facilitate the movement of the fuel tank 1.

Referring to fig. 1, 2 and 3, the capacitor composite fling-cut switch includes a mounting base plate 4 vertically arranged and fixedly connected with an oil tank 1, an electromagnet 5 arranged on the mounting base plate 4, a transmission plate 6 horizontally arranged on one side of the electromagnet 5 and fixedly connected with a movable iron core of the electromagnet 5, a movable end insulator 7 arranged on the mounting base plate 4 and slidably connected with the mounting base plate 4, a stationary end insulator 8 fixedly connected with the mounting base plate 4, an oil switch 9 arranged on the movable end insulator 7 and the stationary end insulator 8, a vacuum switch 10 arranged on the stationary end insulator 8, and a movable end striker 11 arranged on the movable end insulator 7 and enabling the oil switch 9 and the vacuum switch 10 to be started and stopped at intervals; the oil switch 9 and the vacuum switch 10 are connected in series; the electromagnet 5 is connected with the mounting bottom plate 4 through a bolt, and the movable end insulator 7 is connected with the transmission plate 6 through a bolt; the capacitor compound fling-cut switches can be provided with one group or a plurality of groups; the capacitor compensation unit further comprises a controller, which is electrically connected to the electromagnet 5.

When the composite fling-cut switch is switched on, a controller sends a switching-on signal to the electromagnet 5, the electromagnet 5 drives the transmission plate 6 to move towards the direction close to the electromagnet 5, the transmission plate 6 drives the movable end insulator 7 to move towards the direction close to the electromagnet 5, the movable end insulator 7 drives the movable end impactor 11 to move towards the direction close to the electromagnet 5, firstly, the oil switch 9 is switched on, and the vacuum switch 10 is switched on along with the movement of the movable end insulator 7; when the composite fling-cut switch is switched off, a controller sends an opening signal to the electromagnet 5, the electromagnet 5 drives the transmission plate 6 to move towards the direction far away from the electromagnet 5, the transmission plate 6 drives the movable end insulator 7 and the movable end impactor 11 to move towards the direction far away from the electromagnet 5, firstly, the vacuum switch 10 is switched off, and the oil switch 9 is switched off along with the movement of the movable end insulator 7; the design plays a role in separating the brake of the compound fling-cut switch, firstly separating the brake of the vacuum switch 10, then finishing the arc extinguishing of the vacuum switch 10 in the vacuum tube 101, and then separating the brake of the oil switch 9 after a preset time interval, because the circuit is disconnected by the vacuum switch 10, the oil switch 9 can not generate electric arc, thereby avoiding the possibility that the insulating oil is carbonized due to high-temperature electric arc, and further achieving the purpose of no maintenance; meanwhile, an isolation port is formed by disconnecting the first switch, and the vacuum switch 10 and the oil switch 9 are connected in series, so that one end of the vacuum tube 101 is suspended, the recovery voltage at the two ends of the vacuum tube 101 is not enough to cause the vacuum switch 10 to be reignited, and the purpose that the fling-cut switch does not reignite is achieved; the oil tank 1 is arranged, so that the oil switch 9 and the vacuum switch 10 are both placed in insulating oil, and the volume of the composite fling-cut switch is reduced; the movable end insulator 7 and the fixed end insulator 8 are arranged to avoid the possibility that the oil switch 9, the vacuum switch 10 and the movable end impactor 11 are in direct contact with the mounting base plate 4, so that the possibility of electric leakage is reduced. The operation safety is improved; the capacitor composite fling-cut switch can be provided with one group or a plurality of groups, namely, the capacitor composite fling-cut switch loop can be designed into one phase, two phases or three phases, and the use diversity is improved.

Referring to fig. 1 and 3, in order to obtain the on-off state of the composite fling-cut switch, the composite fling-cut switch of the capacitor further includes a travel switch 17 installed on the installation bottom plate 4 and located at one end of the transmission plate 6 far away from the electromagnet 5, and the travel switch 17 is located below the transmission plate 6 and electrically connected with the controller; when the composite fling-cut switch is switched on, a switching-on signal is sent to the electromagnet 5 by the controller, the electromagnet 5 drives the transmission plate 6 to move towards the direction close to the electromagnet 5, after the composite fling-cut switch is switched on, the transmission plate 6 and the travel switch 17 are in a separated state, the travel switch 17 feeds back a corresponding electric signal to the controller, and the controller sends a running stopping signal to the electromagnet 5 so as to stop moving the transmission plate 6; when the composite fling-cut switch is switched off, a switching-off signal is sent to the electromagnet 5 by the controller, the electromagnet 5 drives the transmission plate 6 to move in the direction far away from the electromagnet 5, after the composite fling-cut switch is switched off, the transmission plate 6 and the travel switch 17 are in a contact state, at the moment, the travel switch 17 feeds back a corresponding signal to the controller, and the controller sends an operation stopping signal to the electromagnet 5 so as to stop the operation of the transmission plate 6; the position of the transmission plate 6 can be known in real time through the arranged travel switch 17, corresponding signals are fed back to the controller, and the controller can know the on-off state of the composite fling-cut switch, so that the moving travel of the transmission plate 6 can be controlled more accurately.

Referring to fig. 1 and 3, in order to facilitate the electrical connection between the travel switch 17 and the electromagnet 5 and the controller, the composite fling-cut switch of the capacitor further includes a secondary sealing terminal 15 mounted on the upper end surface of the oil tank 1 and penetrating through the oil inlet tank 1, the secondary sealing terminal 15 being disposed at one side of the oil inlet pipe 14; a cable is die-cast in the secondary sealing terminal 15, one end of the cable is electrically connected with the electromagnet 5 and the travel switch 17, and the other end of the cable is electrically connected with the controller; the design plays a transition role and an integration role, avoids the possibility that various electrical components are connected with the controller independently, and improves the convenience of connection operation.

Referring to fig. 1 and 3, in order to improve the sealing performance between the secondary sealing terminal 15 and the oil tank 1, a pressing plate abutting against the upper end surface of the oil tank 1 is mounted on the secondary sealing terminal 15, the cross section of the pressing plate is N-shaped, and fixing bolts penetrating through the pressing plate and the oil tank 1 and in threaded connection with the pressing plate and the oil tank 1 are arranged on two sides of the secondary sealing terminal 15; the design is to press the secondary sealing terminal 15, so that the sealing performance of the secondary sealing terminal 15 and the oil tank 1 is improved, and the possibility that the insulating oil in the oil tank 1 seeps out from the position of the secondary sealing terminal 15 is avoided.

Referring to fig. 1 and 3, in order to reduce the possibility that external impurities enter the oil tank 1, the composite fling-cut switch of the capacitor further comprises a secondary outlet cover 13 covering the secondary sealing terminal 15 and a waterproof connector 131 for secondary outlet mounted on the side surface of the secondary outlet cover 13, wherein the secondary outlet cover 13 is connected with the oil tank 1 through bolts; the secondary wire outlet cover 13 reduces the possibility that external impurities enter the oil tank 1, and ensures the cleanliness of insulating oil in the oil tank 1; the secondary of setting is qualified for the next round of competitions and is used water joint 131, is convenient for lock fixedly to the cable that sets up between secondary seal terminal 15 and the controller on the one hand, and on the other hand has played sealed effect, has reduced the possibility that external impurity enters into in the oil tank.

Referring to fig. 2 and 4, in order to realize the interval start and stop of the oil switch 9 and the vacuum switch 10, the oil switch 9 includes a first moving contact 91 disposed on the moving end insulator 7, a first fixed contact 92 fixedly connected to the fixed end insulator 8, and a second fixed contact 93 disposed on a side of the first fixed contact 92 away from the first moving contact 91 and fixedly connected to the fixed end insulator 8, wherein the first moving contact 91 is slidably connected to the first fixed contact 92 and the second fixed contact 93 along a connecting line direction of the first fixed contact 92 and the second fixed contact 93, and a length of the first moving contact 91 is greater than a distance between end faces of the first fixed contact 92 and the second fixed contact 93, which are close to each other; the first fixed contact 92 is vertically arranged, the upper end of the first fixed contact 92 is connected with a terminal, and the first fixed contact 92 and the second fixed contact 93 are perpendicular to each other.

Referring to fig. 4, 5 and 6, the vacuum switch 10 includes a vacuum tube 101 disposed on a side of the second fixed contact 93 away from the mounting base plate 4 and connected to the fixed end insulator 8 by a bolt, a third fixed contact 102 disposed in the vacuum tube 101, and a second movable contact 103 disposed on a side of the third fixed contact 102 close to the first movable contact 91, wherein one end of the third fixed contact 102 extends out of the vacuum tube 101 and is connected to another terminal, and a connection between the movable end striker 11 and the second movable contact 103 is parallel to a sliding direction of the movable end insulator 7; the distance between the end surfaces of the first fixed contact 92 and the second fixed contact 93 close to each other is smaller than the distance between the end surfaces of the moving-end striker 11 and the second moving contact 103 close to each other.

Before the composite switching switch is switched on, the first moving contact 91 and the first fixed contact 92 are in a connection state; when the composite fling-cut switch is switched on, a controller sends a switching-on signal to the electromagnet 5, the electromagnet 5 drives the moving end insulator 7 to move towards the direction close to the electromagnet 5, and along with the movement of the moving end insulator 7, the first moving contact 91 is connected with the first fixed contact 92 and the second fixed contact 93 at the same time, so that the oil switch 9 is switched on; because the distance between the end surfaces of the first fixed contact 92 and the second fixed contact 93 which are close to each other is smaller than the distance between the end surfaces of the moving end striker 11 and the second moving contact 103 which are close to each other, only the oil switch 9 is switched on at the moment; along with the continuous movement of the moving-end insulator 7, the moving-end striker 11 collides with the second moving contact 103, and then the second moving contact 103 is in contact with the third fixed contact 102, so that the vacuum switch 10 is switched on; the design realizes the interval starting of the oil switch 9 and the vacuum switch 10; when the composite fling-cut switch is opened, the controller sends an opening signal to the electromagnet 5, the electromagnet 5 drives the moving end insulator 7 to move towards the direction far away from the electromagnet 5, and along with the movement of the moving end insulator 7, the moving end impactor 11 is separated from the second moving contact 103, so that the vacuum switch 10 is opened; because the distance between the end surfaces of the first fixed contact 92 and the second fixed contact 93 which are close to each other is smaller than the distance between the end surfaces of the movable end striker 11 and the second movable contact 103 which are close to each other, the vacuum switch 10 only realizes switching-off at this time; along with the continuous movement of the moving-end insulator 7, the first moving contact 91 is separated from the second fixed contact 93, so that the oil switch 9 is switched off; the design realizes the spaced opening of the oil switch 9 and the vacuum switch 10, thereby avoiding the possibility that the oil switch 9 generates electric arc and the vacuum switch 10 is re-ignited, and achieving the purposes of no maintenance and no re-ignition.

Referring to fig. 5 and 6, in order to enable the vacuum switch 10 to realize switching on and switching off, the composite fling-cut switch of the capacitor further comprises a fixing frame 12 which is arranged at one end of the vacuum tube 101 close to the movable end striker 11 and is in bolt connection with the fixed end insulator 8, wherein the cross section of the fixing frame 12 is approximately door-shaped; the second moving contact 103 comprises a moving end conducting rod 1031 which extends into the fixed frame 12 and is in sliding connection with the vacuum tube 101; the vacuum switch 10 further includes a first connecting rod 104 disposed at one end of the moving-end conducting rod 1031 far away from the third stationary contact 102 and in threaded connection with the moving-end conducting rod 1031, a contact piece 105 disposed at one end of the first connecting rod 104 far away from the moving-end conducting rod 1031 and outside the fixing frame 12, a first conducting strip 106 disposed in the fixing frame 12 and fixedly connected with the first connecting rod 104, and a return spring 107 disposed between the first conducting strip 106 and the fixing frame 12; the contact piece 105 is spaced from the fixed frame 12, the contact piece 105 is coaxial with the first connecting rod 104 and is integrally formed, the first connecting rod 104 is slidably connected with the fixed frame 12, the return spring 107 is in contact with the first conductive sheet 106 and the fixed frame 12, and the first conductive sheet 106 is electrically connected with the second stationary contact 93.

When the vacuum switch 10 is switched on, the moving-end insulator 7 drives the moving-end striker 11 to move in a direction close to the fixed frame 12 until the moving-end striker 11 abuts against the contact piece 105, and then along with the continuous movement of the moving-end striker 11, the contact piece 105 will overcome the elastic force of the return spring 107 to move in a direction close to the fixed frame 12, and at this time, the moving-end conductive rod 1031 will also move in a direction close to the third fixed contact 102; when the contact piece 105 is attached to the fixed frame 12, the movable end conductive rod 1031 is also connected to the third fixed contact 102, so that the vacuum switch 10 is switched on; when the vacuum switch 10 is opened, the moving-end insulator 7 drives the moving-end striker 11 to move in a direction away from the fixed frame 12, and along with the movement of the moving-end striker 11, under the action of the return spring 107, the return spring 107 drives the conducting strip to move in a direction close to the contact piece 105, and at this time, the moving-end conducting rod 1031 is separated from the third fixed contact 102, so that the vacuum switch 10 is opened; then, when the moving-end striker 11 is separated from the contact piece 105, the contact piece 105 will be reset by the reset spring 107, so as to be ready for next closing.

Referring to fig. 2, 4 and 5, in order to reduce the collision force between the moving-end striker 11 and the contact piece 105, the moving-end striker 11 includes a defining frame 111 fixedly connected to the moving-end insulator 7 and arranged perpendicular to the first movable contact 91, two striker pieces 112 disposed within the defining frame 111 and symmetrically arranged along a center line of the defining frame 111, and a first buffer spring 113 disposed between the two striker pieces 112; the impact piece 112 comprises a connecting shaft 1121 connected to the limiting frame 111 in a sliding manner, impact pieces 1122 integrally formed at two ends of the connecting shaft 1121 and coaxial with the connecting shaft 1121, and a limiting shaft 1123 fixedly connected to an end face, away from the connecting shaft 1121, of the impact pieces 1122 in the limiting frame 111, wherein the limiting shaft 1123 is coaxial with and integrally formed with the connecting shaft 1121, the extending direction of the connecting shaft 1121 is parallel to the sliding direction of the moving-end insulator 7, and the first buffer spring 113 is sleeved on the limiting shaft 1123 and abuts against the two impact pieces 1122 arranged oppositely; the distance between the striking plate 1122 disposed close to the contact plate 105 and the contact plate 105 is smaller than the distance between the end surfaces of the two stationary contacts close to each other.

When the vacuum switch 10 is switched on, the moving-end insulator 7 drives the moving-end impactor 11 to move towards the direction close to the contact piece 105, the impact piece 1122 close to the contact piece 105 is in collision fit with the contact piece 105 along with the movement of the moving-end impactor 11, and the vacuum switch 10 is switched on only after the contact piece 105 is in fit with the side face of the fixed frame 12; due to the design, the collision between the impact sheet 1122 and the contact sheet 105 is elastic, the possibility that the collision between the impact sheet 1122 and the contact sheet 105 is hard is avoided, the possibility that the impact sheet 1122 and the contact sheet 105 are damaged after collision is reduced, and the effective service life of the impact sheet 1122 and the contact sheet 105 is ensured; meanwhile, after the contact piece 105 is impacted by the passive end impactor 11, when the travel distance of the electromagnet 5 is smaller than the travel distance of the vacuum tube 101 and the deformation travel distance of the first buffer spring 113, the electromagnet 5 can normally act in place through the deformation of the first buffer spring 113, so that the possibility that the electromagnet 5 does not act in place after the contact piece 105 is attached to the side surface of the fixing frame 12 is avoided, and the normal development of subsequent operation is ensured.

Referring to fig. 7, in order to enable the first movable contact 91 to be smoothly connected with the first fixed contact 92 and the second fixed contact 93 in a sliding manner, the first movable contact 91 includes a fixed plate 911 fixedly connected to the moving-end insulator 7, a second conductive plate 912 disposed on two sides of the fixed plate 911 and slidably connected with the first fixed contact 92 and the second fixed contact 93, and a fixed part 913 penetrating through the fixed plate 911 and the two second conductive plates 912; the fixed sheet 911 is parallel to the first fixed contact 92 and the second fixed contact 93, a protrusion is formed on the end face of the first fixed contact 92 close to the end face of the second fixed contact 93, and a groove matched with the protrusion is formed in the first fixed contact 92; the fixing piece 913 comprises a second connecting rod 9131 penetrating through the fixing piece 911 and the two second conductive sheets 912, an attaching sheet 9132 arranged on one side, far away from the fixing piece 911, of the second conductive sheet 912 and attached to the fixing piece 911, a blocking sheet 9133 arranged on one side, far away from the fixing piece 911, of the other second conductive sheet 912 and in threaded connection with the second connecting rod 9131, and a second buffer spring 9134 arranged between the blocking sheet 9133 and the fixing piece 911, wherein the second connecting rod 9131 is perpendicular to the fixing piece 911; the cross section of the second conductive sheets 912 is approximately L-shaped, and the end surfaces of the two second conductive sheets 912 close to each other are attached to the fixing sheet 911; the attaching piece 9132 and the second connecting rod 9131 are coaxially and integrally formed, and the second buffer spring 9134 is abutted with the second conductive sheet 912 and the blocking sheet 9133.

When the oil switch 9 is switched on, the moving-end insulator 7 moves towards the direction close to the second fixed contact 93, the two second conducting strips 912 are in sliding connection with the first fixed contact 92, and along with the movement of the moving-end insulator 7, the two second conducting strips 912 are in contact with the second fixed contact 93 and become in sliding connection, so that the oil switch 9 is switched on; when the oil switch 9 is opened, the moving-end insulator 7 moves in a direction away from the second fixed contact 93 until the two second conductive sheets 912 are separated from the second fixed contact 93, so that the oil switch 9 is opened; when a salient point exists at a position where the first fixed contact 92 or the second fixed contact 93 is in contact with the second conductive sheet 912, the second buffer spring 9134 facilitates the two second conductive sheets 912 to slightly move in a direction away from each other, so that the first movable contact 91 can be more smoothly in sliding connection with the first fixed contact 92 and the second fixed contact 93; the arranged bulges play a role in limiting, so that the possibility that the first fixed contact 92 and the second fixed contact 93 shake randomly between the two second conducting strips 912 is reduced; the shape design of the second conductive sheet 912 improves the connection stability of the second conductive sheet 912 and the fixing sheet 911, and reduces the possibility that the second conductive sheet 912 shakes randomly.

Referring to fig. 1, 3 and 4, in order to enable the moving end insulator 7, the first moving contact 91 and the moving end striker 11 to realize good sliding, the composite fling-cut switch of the capacitor further includes a slider fixedly connected to an end surface of the moving end insulator 7 close to the mounting base plate 4, and a sliding groove for the slider to slide is formed on an end surface of the mounting base plate 4 close to the moving end insulator 7, wherein in the embodiment of the present application, the slider is shaped like a waist; when the movable end insulator 7 moves, the possibility that the movable end insulator 7 is in direct contact with the mounting base plate 4 is avoided by the arranged slide block and the arranged slide groove, so that the movable end insulator 7 can slide more smoothly.

To sum up, the application process of this application is: when the compound fling-cut switch is switched on, the first moving contact 91 and the first fixed contact 92 are in a connected state, the controller sends a switching-on signal to the electromagnet 5, the electromagnet 5 drives the transmission plate 6 to move towards the direction close to the electromagnet 5, the transmission plate 6 drives the moving end insulator 7 to move towards the direction close to the electromagnet 5, and the moving end insulator 7 drives the moving end impactor 11 to move towards the direction close to the electromagnet 5; firstly, the first moving contact 91 is connected with the first fixed contact 92 and the second fixed contact 93 at the same time, so that the oil switch 9 is switched on; after a period of time, the striking plate 1122 collides with the contact plate 105, and with the continuous movement of the moving-end striker 11, the contact plate 105 moves toward the fixed frame 12 against the elastic force of the return spring 107, and at this time, the moving-end conductive rod 1031 also moves toward the third fixed contact 102; when the contact piece 105 is attached to the fixed frame 12, the movable end conductive rod 1031 is also connected to the third fixed contact 102, so that the vacuum switch 10 is switched on.

When the composite fling-cut switch is switched off, a controller sends an opening signal to the electromagnet 5, the electromagnet 5 drives the transmission plate 6 to move towards the direction far away from the electromagnet 5, and the transmission plate 6 drives the movable end insulator 7 and the movable end impactor 11 to move towards the direction far away from the electromagnet 5; firstly, the moving-end insulator 7 drives the moving-end striker 11 to move in a direction away from the fixed frame 12, and along with the movement of the moving-end striker 11, under the action of the return spring 107, the return spring 107 drives the conducting strip to move in a direction close to the contact piece 105, and at this time, the moving-end conducting rod 1031 is separated from the third static contact 102, so that the vacuum switch 10 is switched off; then, along with the continuous movement of the moving-end insulator 7, the first moving contact 91 will be separated from the second fixed contact 93, so that the oil switch 9 is opened.

The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.

Claims

1. The utility model provides a compound fling-cut switch of condenser which characterized in that: the oil tank (1) is arranged in the oil tank (1), and the oil tank (1) is communicated with an oil inlet pipe (14); comprises a mounting bottom plate (4) arranged in an oil tank (1), an oil switch (9) and a vacuum switch (10) which are arranged on the mounting bottom plate (4), and a moving end impactor (11); the oil switch (9) and the vacuum switch (10) are connected in series;

when the composite switching switch is switched on, the movable end impactor (11) enables the oil switch (9) to be switched on firstly, and then enables the vacuum switch (10) to be switched on within preset time;

when the composite fling-cut switch is opened, the moving end impactor (11) enables the vacuum switch (10) to be opened firstly, and then enables the oil switch (9) to be opened within a preset time.

2. The compound switching switch of the capacitor according to claim 1, characterized in that: the oil switch (9) comprises a first fixed contact (92) arranged on the mounting base plate (4), a second fixed contact (93) arranged on one side of the first fixed contact (92), and a first moving contact (91) which is in sliding connection with the mounting base plate (4) along the direction of the extension line of the first fixed contact (92) and the second fixed contact (93), wherein the first moving contact (91) is in sliding connection with the first fixed contact (92) and the second fixed contact (93), and the first moving contact (91) is fixedly connected with the moving end impactor (11); the vacuum switch (10) comprises a vacuum tube (101) arranged on one side of the second fixed contact (93), a third fixed contact (102) arranged in the vacuum tube (101) and a second movable contact (103) arranged on one side of the third fixed contact (102) close to the first movable contact (91); the first fixed contact (92) is connected with the terminal, the second fixed contact (93) is connected with the second moving contact (103), and the third fixed contact (102) is connected with the other terminal; the moving end striker (11) is connected with the first moving contact (91), and a connecting line of the moving end striker (11) and the second moving contact (103) is parallel to the sliding direction of the first moving contact (91); the time length spent for realizing the connection of the first movable contact (91) and the first fixed contact (92) and the second fixed contact (93) is less than the time length spent for realizing the connection of the second movable contact (103) and the third fixed contact (102).

3. The compound switching switch of the capacitor according to claim 2, characterized in that: the vacuum tube fixing device also comprises a fixing frame (12) arranged on one side of the vacuum tube (101) close to the moving end impactor (11); the second moving contact (103) comprises a moving end conducting rod (1031) extending into the fixed frame (12); the vacuum switch (10) further comprises a first connecting rod (104) which is arranged at one end of the movable end conducting rod (1031) far away from the third fixed contact (102) and is connected with the movable end conducting rod (1031), a contact piece (105) which is arranged at one end of the first connecting rod (104) far away from the movable end conducting rod (1031) and is arranged outside the fixing frame (12), a first conducting strip (106) which is arranged in the fixing frame (12) and is fixedly connected with the first connecting rod (104), and a reset spring (107) which is arranged between the first conducting strip (106) and the vacuum tube (101); a space is reserved between the contact piece (105) and the fixed frame (12); the first conducting strip (106) is electrically connected with the second fixed contact (93).

4. The compound switching switch of the capacitor according to claim 2, characterized in that: the movable end striker (11) comprises a limiting frame (111) arranged on the mounting base plate (4), two striker pieces (112) which are arranged in the limiting frame (111) and symmetrically arranged along the central line of the limiting frame (111), and a first buffer spring (113) arranged between the two striker pieces (112); the impact piece (112) comprises a connecting shaft (1121) connected to the limiting frame (111) in a sliding mode, impact sheets (1122) fixedly connected to two ends of the connecting shaft (1121) and a limiting shaft (1123) fixedly connected to the end face, away from the connecting shaft (1121), of the impact sheets (1122) in the limiting frame (111), and a buffer spring is sleeved on the limiting shaft (1123) and abuts against the impact sheets (1122); the extending direction of the connecting shaft (1121) is parallel to the sliding direction of the first movable contact (91).

5. The compound switching switch of the capacitor according to claim 2, characterized in that: the first moving contact (91) comprises a fixed sheet (911) arranged on the installation bottom plate (4), a second conducting sheet (912) arranged on two sides of the fixed sheet (911) and connected with the first fixed contact (92) and the second fixed contact (93) in a sliding mode, and a fixing piece (913) penetrating through the fixed sheet (911) and the second conducting sheet (912); the fixing piece (913) comprises a second connecting rod (9131) penetrating through the fixing piece (911) and the two second conducting strips (912), a laminating piece (9132) arranged on one side, far away from the fixing piece (911), of the second conducting strip (912) and fixedly connected with the second connecting rod (9131), a blocking piece (9133) arranged on one side, far away from the fixing piece (911), of the other second conducting strip (912) and in threaded connection with the second connecting rod (9131), and a second buffer spring (9134) arranged between the blocking piece (9133) and the second conducting strip (912); the attaching sheet (9132) is attached to the second conductive sheet (912).

6. The compound switching switch of the capacitor according to claim 2, characterized in that: the movable end insulator (7) is arranged on the mounting bottom plate (4) and is in sliding connection with the mounting bottom plate (4); the first moving contact (91) is arranged on the moving end insulator (7), and the moving end impactor (11) is arranged on the moving end insulator (7).

7. The compound switching switch of capacitor as claimed in claim 6, characterized in that: the device also comprises an electromagnet (5) arranged on the mounting bottom plate (4) and a transmission plate (6) which is arranged on one side of the electromagnet (5) and is fixedly connected with the electromagnet (5); one side of the oil tank (1) is provided with a controller; the moving end insulator (7) is fixedly connected with the transmission plate (6); the controller is electrically connected with the electromagnet (5).

8. The compound switching switch of capacitor as claimed in claim 6, characterized in that: the sliding block is fixedly connected to the end face, close to the mounting base plate (4), of the movable end insulator (7), and a sliding groove for sliding of the sliding block is formed in the end face, close to the movable end insulator (7), of the mounting base plate (4).

9. The compound switching switch of the capacitor according to claim 2, characterized in that: the fixed contact structure further comprises a fixed end insulator (8) fixedly connected to the mounting base plate (4), and the first fixed contact (92), the second fixed contact (93) and the fixed frame (12) are fixedly connected with the fixed end insulator (8); the oil inlet pipe (14) is covered with a secondary wire outlet cover (13) and a secondary sealing terminal (15) arranged in the oil tank (1); the controller is electrically connected with the secondary sealing terminal (15), and the electromagnet (5) is electrically connected with the secondary sealing terminal (15); the secondary wire outlet cover (13) is provided with a secondary wire outlet waterproof connector (131), and the secondary wire outlet waterproof connector (131) is electrically connected with the secondary sealing terminal (15).

10. A capacitor compensation unit comprising a compound capacitor switching switch according to any one of claims 1 to 9, wherein: the device is characterized by further comprising a protection current transformer (2) which is arranged on the oil tank (1) and connected with the capacitor composite switching switch, and a reactor (3) which is arranged above the protection current transformer (2) and integrated with the protection current transformer (2) in a pouring mode.