CN114156139A

CN114156139A - Medium-high voltage circuit breaker with function of driving away resultant between isolation contacts

Info

Publication number: CN114156139A
Application number: CN202111413869.5A
Authority: CN
Inventors: 彭东
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-11-25
Filing date: 2021-11-25
Publication date: 2022-03-08

Abstract

The invention belongs to the field of circuit breakers, and particularly relates to a medium-high voltage circuit breaker with the function of isolating a product between contacts from the circuit breaker, which comprises a bottom plate; the upper surface of bottom plate fixedly connected with front shroud, the internal surface of front shroud rotates and is connected with regulating switch, the back fixedly connected with apron of front shroud. This middle-high voltage circuit breaker with product drives away between isolation contact is through setting up second grade closing mechanism, when stirring adjustment switch, arc magnet drives the iron core motion, the pole that hangs down moves down in the drive of insulation board, the lever upwards promotes the connecting rod, activity bow-shaped board and fixed bow-shaped board separation, the end of intaking of play electric wire stops transmitting electricity, because the surface area of fixed bow-shaped board and activity bow-shaped board is very big, in two board relative sliding, utilize increase area of contact to reduce induced-current's production, traditional contact formula circuit breaker has been solved because contact area of contact is less, easy because induced-current produces the problem of electric spark when the switching.

Description

Medium-high voltage circuit breaker with function of driving away resultant between isolation contacts

Technical Field

The invention belongs to the field of circuit breakers, and particularly relates to a medium-high voltage circuit breaker with the function of isolating a product between contacts from driving away.

Background

Circuit breakers are important switching devices in electrical power systems, which can switch on and off load currents of electrical devices during normal operation and reliably switch off short-circuit currents when a system fails. The circuit breaker generally comprises a moving contact, a fixed contact, an arc-extinguishing device, an operating mechanism, an insulating support and the like. In order to realize the automatic control of the circuit breaker, an auxiliary contact linked with a transmission shaft of the circuit breaker is also arranged in the operating mechanism.

Traditional circuit breaker is used for high pressure occasion more, in the twinkling of an eye of switching, is used for induced-current's effect, can produce very high temperature between the contact, and high temperature high voltage electric spark can make the metal oxidation hardening of contact surface, and high temperature oxide can splash everywhere, bonds the surface in equipment inside at last, and this life that can make equipment shortens, and serious meeting is because circuit high temperature fires.

Disclosure of Invention

The invention aims to provide a medium-high voltage circuit breaker with the function of isolating the product between contacts from being driven away, so as to solve the problems in the background technology.

The technical scheme adopted by the invention for solving the technical problems is as follows: the invention relates to a medium-high voltage circuit breaker with the function of separating products between contacts, which comprises a bottom plate, a first isolating plate and a second isolating plate, wherein the bottom plate is provided with a first insulating layer; the utility model discloses a wire feeding device, including bottom plate, last fixed surface of bottom plate is connected with the front shroud, the internal surface of front shroud rotates and is connected with regulating switch, the back fixedly connected with apron of front shroud, the last fixed surface of apron is connected with out the electric wire, the bottom of going out the electric wire is provided with adjustment mechanism, adjustment mechanism is located the inside of apron, adjustment mechanism's back swing joint has second grade closing mechanism, second grade closing mechanism's top swing joint has coupling mechanism, coupling mechanism's bottom swing joint has electric power storage mechanism, electric power storage mechanism's back swing joint has one-level closing mechanism, one-level closing mechanism's back fixedly connected with advances the electric wire.

Adjustment mechanism includes arc magnet, the surface of arc magnet and adjustment switch's surface fixed connection, arc magnet's right side is provided with the rubber slab, the surface swing joint on left surface of rubber slab and arc magnet right side, the internal surface swing joint of rubber slab has the iron core, the bottom fixedly connected with compression spring of iron core, compression spring's right-hand member is provided with the pole that hangs down, it is located the outside of rubber slab to hang down the pole.

The second grade closing mechanism package lever, the left end of lever contacts with the bottom of hanging down the pole, the right-hand member swing joint of lever has the connecting plate, the outer fixed surface on connecting plate right side is connected with movable bow-shaped board, the right side of activity bow-shaped board is provided with fixed bow-shaped board, the lower surface of fixed bow-shaped board is connected with the last fixed surface of bottom plate, the outer fixed surface of fixed bow-shaped board is connected with the wire.

The electric power storage mechanism comprises a rectangular groove, the rectangular groove is formed in the wall of the bottom plate, the upper surface of the bottom plate is movably connected with a movable block, the upper surface of the movable block is connected with a connecting disc in a rotating mode, the outer surface of the connecting disc is fixedly connected with a capacitor, an electric brush is arranged outside the capacitor, the outer surface of the outer surface connecting disc of the electric brush is movably connected, and the left outer surface of the electric brush is fixedly connected with a wire.

The connecting mechanism comprises an insulating plate, the lower surface of the insulating plate is fixedly connected with the iron core and the top end of the vertical rod, pull rods are movably connected to two sides of the insulating plate, a fixed rod is fixedly connected to the lower surface of each pull rod, the outer surface of each fixed rod is rotatably connected with the outer surface of each movable block, a cam is rotatably connected to the bottom end of each pull rod, and a screw rod is fixedly connected to the outer surface of each cam.

The one-level closing mechanism includes the sealed tube, the internal surface swing joint of sealed tube has pop-up mechanism, pop-up mechanism's right side swing joint has the fixed plate, the surface of fixed plate and the internal surface fixed connection of sealed tube, the right side of fixed plate is provided with telescopic machanism, telescopic machanism's surface and the internal surface swing joint of sealed tube.

The pop-up mechanism comprises a metal rod, the outer surface of the metal rod is movably connected with a clamping rod, the outer surface on the right side of the clamping rod is movably connected with a lantern ring, the inner surface of the lantern ring is slidably connected with the outer surface of the metal rod, the left end of the metal rod is fixedly connected with a picture, the outer surface of the picture is movably connected with a sliding plate, the inner surface of the sliding plate is movably connected with an X-shaped rod, and the outer surface of the sliding rod is slidably connected with the inner surface of a sealing pipe.

The telescopic mechanism comprises a rubber ring, an inclined plate is movably connected in the wall of the rubber ring, a thread groove is formed in the inner surface of the rubber ring, and a supporting rod is fixedly connected to the outer surface of the right side of the rubber ring.

The invention has the following beneficial effects:

1. according to the invention, the secondary closing mechanism is arranged, when the adjusting switch is toggled, the arc-shaped magnet drives the iron core to move, the vertical rod moves downwards under the driving of the insulating plate, the lever pushes the connecting rod upwards, the movable arc-shaped plate is separated from the fixed arc-shaped plate, and the power transmission is stopped at the power inlet end of the power outlet wire.

2. The invention arranges the first-stage closing mechanism, the connecting mechanism moves along with the movement of the adjusting switch, the pull rod pushes the cam to move, the screw rod rotates relative to the cam, the popping mechanism and the telescopic mechanism rotate outwards to pop out under the action of the screw rod, the X-shaped rod and the elastic sheet push the sliding plate out, the clamping rod opens under the action of the lantern ring, at the moment, the metal rod separates the clamping rod from the inclined plate, the metal rod and the rubber ring are disconnected, the power supply of the supporting rod is stopped, because the clamping rod is in spiral friction contact with the inclined plate, the probability of electric spark generation is greatly reduced by increasing the contact area, and because of the existence of the sealing tube, even high-pressure steam produces the resultant, the sealed tube also can keep apart it in the inside of sealed tube, avoids splashing, and the resultant between the contact also can break away from under the frictional action automatically, has solved traditional circuit breaker and can make metal evaporation at switching high-voltage current in the twinkling of an eye to produce the problem of the metallic oxide that splashes.

3. According to the invention, the power storage mechanism is arranged, when the connecting mechanism moves, the fixed rod pushes the movable block to slide along the rectangular groove, the outer surface of the connecting disc is in contact with and extruded with the outer surface of the electric brush, at the moment, the primary closing mechanism and the secondary closing mechanism are simultaneously opened, the incoming wire and the outgoing wire outside the device are completely disconnected with the inside of the device, the residual current of the internal circuit of the device forms a closed loop with the capacitor through the conducting wire, the capacitor stores the internal current and ensures complete power failure inside and outside the device, when the regulating switch is opened, the electric brush is separated from the connecting disc, the capacitor is broken, and the circuits of the primary closing mechanism and the secondary closing mechanism are closed, so that the electricity utilization safety is ensured, and the problem that the internal single-stage circuit of the traditional circuit breaker is easily damaged due to high temperature is solved.

Drawings

FIG. 1 is a front view of the present invention;

FIG. 2 is a cross-sectional view of the present invention;

FIG. 3 is a schematic view of the adjustment mechanism of the present invention;

FIG. 4 is a schematic structural view of a two-stage closure mechanism of the present invention;

FIG. 5 is a schematic structural view of a power storage mechanism of the invention;

FIG. 6 is a schematic structural view of the coupling mechanism of the present invention;

FIG. 7 is a schematic view of the construction of the primary closure mechanism of the present invention;

FIG. 8 is a schematic diagram of the structure of the eject mechanism of the present invention;

fig. 9 is a schematic structural view of the telescopic mechanism of the present invention.

In the figure: the electric wire drawing device comprises a bottom plate 1, a front cover 2, an adjusting switch 3, a cover plate 4, an electric wire 5, an adjusting mechanism 10, a secondary closing mechanism 11, a connecting mechanism 12, an electric power storage mechanism 13, a primary closing mechanism 14, an electric wire 15, an arc magnet 20, a rubber plate 21, an iron core 22, a compression spring 23, a hanging rod 24, a lever 30, a connecting plate 31, a movable arched plate 32, a fixed arched plate 33, a lead 34, a rectangular groove 40, a movable block 41, a connecting plate 42, a capacitor 43, an electric brush 44, an insulating plate 50, a pull rod 51, a fixed rod 52, a cam 53, a screw rod 54, a sealing pipe 55, an ejecting mechanism 56, an expanding mechanism 57, a fixed plate 58, a metal rod 60, a clamping rod 61, a lantern ring 62, an elastic sheet 63, a sliding plate 64, an X-shaped rod 65, a rubber ring 70, an inclined plate 71, a threaded groove 72 and a supporting rod 73.

Detailed Description

A medium-high voltage circuit breaker having a function of isolating a product between contacts according to an embodiment of the present invention will be described below with reference to fig. 1 to 9.

As shown in fig. 1-9, the medium-high voltage circuit breaker with the function of isolating the product between contacts in the invention comprises a bottom plate 1; the upper surface fixedly connected with front shroud 2 of bottom plate 1, the internal surface of front shroud 2 rotates and is connected with regulating switch 3, the back fixedly connected with apron 4 of front shroud 2, the upper surface fixedly connected with of apron 4 goes out electric wire 5, the bottom that goes out electric wire 5 is provided with adjustment mechanism 10, adjustment mechanism 10 is located the inside of apron 4, the back swing joint of adjustment mechanism 10 has second grade closing mechanism 11, the top swing joint of second grade closing mechanism 11 has coupling mechanism 12, the bottom swing joint of coupling mechanism 12 has electric power storage mechanism 13, the back swing joint of electric power storage mechanism 13 has one-level closing mechanism 14, the back fixedly connected with of one-level closing mechanism 14 advances electric wire 15.

Adjustment mechanism 10 includes arc magnet 20, the surface of arc magnet 20 and adjustment switch 3's fixed surface is connected, arc magnet 20's right side is provided with rubber slab 21, the surface swing joint on the left surface of rubber slab 21 and the surface on arc magnet 20 right side, the internal surface swing joint of rubber slab 21 has iron core 22, iron core 22's bottom fixedly connected with compression spring 23, compression spring 23's right-hand member is provided with plumbing pole 24, plumbing pole 24 is located the outside of rubber slab 21.

The second-stage closing mechanism 11 comprises a lever 30, the left end of the lever 30 is in contact with the bottom end of the vertical bar 24, the right end of the lever 30 is movably connected with a connecting plate 31, the outer surface on the right side of the connecting plate 31 is fixedly connected with a movable arc-shaped plate 32, the right side of the movable arc-shaped plate 32 is provided with a fixed arc-shaped plate 33, the lower surface of the fixed arc-shaped plate 33 is fixedly connected with the upper surface of the bottom plate 1, the outer surface of the fixed arc-shaped plate 33 is fixedly connected with a lead 34, through the arrangement of the second-stage closing mechanism 11, when the adjusting switch 3 is toggled, the arc-shaped magnet 20 drives the iron core 22 to move, the vertical bar 24 moves downwards under the driving of the insulating plate 50, the lever 30 pushes the connecting rod 31 upwards, the movable arc-shaped plate 32 is separated from the fixed arc-shaped plate 33, the power transmission is stopped at the power input end of the power output wire 5, because the surface areas of the fixed arc-shaped plate 33 and the movable plate 32 are very large, when the two plates slide relatively, the contact area is increased to reduce the generation of induced current, and the problem that the traditional contact type circuit breaker is easy to generate electric sparks due to the induced current when the traditional contact type circuit breaker is opened and closed because the contact area of the contact is small is solved.

The electric power storage mechanism 13 comprises a rectangular groove 40, the rectangular groove 40 is arranged in the wall of the bottom plate 1, the upper surface of the bottom plate 1 is movably connected with a movable block 41, the upper surface of the movable block 41 is rotatably connected with a connecting disc 42, the outer surface of the connecting disc 42 is fixedly connected with a capacitor 43, the outer part of the capacitor 43 is provided with a brush 44, the outer surface of the connecting disc 42 of the brush 44 is movably connected, the outer surface of the left side of the brush 44 is fixedly connected with a conducting wire 34, through the arrangement of the electric power storage mechanism 13, when the connecting mechanism 12 moves, a fixed rod 52 pushes the movable block 41 to slide along the rectangular groove 40, the outer surface of the connecting disc 42 is in contact with and extruded with the outer surface of the brush 44, because the primary closing mechanism 14 and the secondary closing mechanism 11 are simultaneously disconnected, the incoming wire 15 and the outgoing wire 5 outside the equipment are completely disconnected with the inside of the equipment, and the residual current of the internal circuit of the equipment forms a closed loop with the capacitor 43 through the conducting wire 34, inside electric current is stored to electric capacity 43, ensures the inside and outside complete outage of equipment, and when regulating switch 3 opened, brush 44 separated with connection pad 42, and electric capacity 43 opens circuit, and one-level closing mechanism 14 and second grade closing mechanism 11 then the circuit is closed, and electricity safety is ensured in triple guarantee, has solved the inside single-stage of traditional circuit breaker and has opened circuit, very easily because the problem of high temperature damage.

The connecting mechanism 12 comprises an insulating plate 50, the lower surface of the insulating plate 50 is fixedly connected with the top ends of the iron core 22 and the vertical rod 24, pull rods 51 are movably connected to two sides of the insulating plate 50, a fixed rod 52 is fixedly connected to the lower surface of the pull rod 51, the outer surface of the fixed rod 52 is rotatably connected with the outer surface of the movable block 41, a cam 53 is rotatably connected to the bottom end of the pull rod 51, and a screw 54 is fixedly connected to the outer surface of the cam 53.

The primary closing mechanism 14 comprises a sealing tube 55, an ejection mechanism 56 is movably connected to the inner surface of the sealing tube 55, a fixing plate 58 is movably connected to the right side of the ejection mechanism 56, the outer surface of the fixing plate 58 is fixedly connected with the inner surface of the sealing tube 55, a telescopic mechanism 57 is arranged on the right side of the fixing plate 58, and the outer surface of the telescopic mechanism 57 is movably connected with the inner surface of the sealing tube 55.

The pop-up mechanism 56 comprises a metal rod 60, a clamping rod 61 is movably connected to the outer surface of the metal rod 60, a lantern ring 62 is movably connected to the outer surface of the right side of the clamping rod 61, the inner surface of the lantern ring 62 is in sliding connection with the outer surface of the metal rod 60, a picture 63 is fixedly connected to the left end of the metal rod 60, a sliding plate 64 is movably connected to the outer surface of the picture 63, an X-shaped rod 65 is movably connected to the inner surface of the sliding plate 64, and the outer surface of the sliding rod 64 is in sliding connection with the inner surface of the sealing pipe 55.

The telescopic mechanism 57 comprises a rubber ring 70, an inclined plate 71 is movably connected in the wall of the rubber ring 70, a thread groove 72 is formed in the inner surface of the rubber ring 70, a support rod 73 is fixedly connected to the outer surface of the right side of the rubber ring 70, the connecting mechanism 12 moves along with the movement of the adjusting switch 3 through the arrangement of the primary closing mechanism 14, the pull rod 51 pushes the cam 53 to move, the screw 54 rotates relative to the cam 53, the pop-up mechanism 56 and the telescopic mechanism 57 are popped out in an outward rotating mode under the action of the screw 54, the sliding plate 64 is pushed out by the X-shaped rod 65 and the elastic sheet 63, the clamping rod 61 is opened under the action of the lantern ring 62, at the moment, the clamping rod 61 is separated from the inclined plate 71 through the metal rod 60, the metal rod 60 is disconnected with the rubber ring 70, the power supply of the support rod 73 is stopped, the probability of electric spark generation is greatly reduced through increasing the contact area due to the spiral friction contact between the clamping rod 61 and the inclined plate 71, and due to the existence of the sealing pipe 55, even if high-pressure steam produces the resultant, sealed tube 55 also can keep apart it in sealed tube 55's inside, avoids splashing, and the resultant between the contact also can break away from under the friction action automatically, has solved traditional circuit breaker and can make metal evaporation at the switching high-voltage current in the twinkling of an eye to produce the problem of the metal oxide that splashes.

The specific working process is as follows:

in operation, current enters the primary closing mechanism 14 from the current inlet 15, then flows into the secondary closing mechanism 11 from the electricity storage mechanism 13, and finally flows out from the current outlet 5.

When the adjusting switch 3 is pulled, the arc magnet 20 drives the iron core 22 to move, the hanging rod 24 is driven by the insulating plate 50 to move downwards, the lever 30 pushes the connecting rod 31 upwards, the movable arc-shaped plate 32 is separated from the fixed arc-shaped plate 33, the power transmission of the power inlet end of the power outlet wire 5 is stopped, and due to the fact that the surface areas of the fixed arc-shaped plate 33 and the movable arc-shaped plate 32 are very large, the contact area is increased while the two plates slide relatively, and the generation of induced current is reduced.

The connecting mechanism 12 moves along with the movement of the adjusting switch 3, the pull rod 51 pushes the cam 53 to move, the screw rod 54 rotates relative to the cam 53, the ejection mechanism 56 and the telescopic mechanism 57 are ejected in an outward rotating mode under the action of the screw rod 54, the X-shaped rod 65 and the elastic sheet 63 push the sliding plate 64 out, the clamping rod 61 is opened under the action of the sleeve ring 62, at the moment, the metal rod 60 enables the clamping rod 61 to be separated from the inclined plate 71, the metal rod 60 is disconnected with the rubber ring 70, the power supply of the support rod 73 is stopped, the probability of electric sparks is greatly reduced by increasing the contact area due to the spiral friction contact of the clamping rod 61 and the inclined plate 71, and due to the existence of the sealing pipe 55, even if high-pressure steam generates products, the sealing pipe 55 can isolate the high-pressure steam inside the sealing pipe 55, so that splashing is avoided, and the products between contacts can automatically separate under the friction action.

When the connecting mechanism 12 moves, the fixed rod 52 pushes the movable block 41 to slide along the rectangular groove 40, the outer surface of the connecting disc 42 is in contact with and pressed by the outer surface of the electric brush 44, the primary closing mechanism 14 and the secondary closing mechanism 11 are simultaneously opened at the moment, the power inlet wire 15 and the power outlet wire 5 outside the equipment are completely disconnected with the inside of the equipment, residual current of the internal circuit of the equipment forms a closed loop with the capacitor 43 through the lead 34, the capacitor 43 stores the internal current and ensures complete power failure inside and outside the equipment, when the adjusting switch 3 is opened, the electric brush 44 is separated from the connecting disc 42, the capacitor 43 is disconnected, the circuit of the primary closing mechanism 14 and the secondary closing mechanism 11 is closed, and electricity utilization safety is ensured.

While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A medium-high voltage circuit breaker with isolated contact product repulsion comprises a base plate (1); the method is characterized in that: the upper surface of the bottom plate (1) is fixedly connected with a front cover (2), the inner surface of the front cover (2) is rotatably connected with an adjusting switch (3), the back surface of the front cover (2) is fixedly connected with a cover plate (4), the upper surface of the cover plate (4) is fixedly connected with an electric wire outlet (5), the bottom of the outgoing wire (5) is provided with an adjusting mechanism (10), the adjusting mechanism (10) is positioned inside the cover plate (4), the back of the adjusting mechanism (10) is movably connected with a secondary closing mechanism (11), the top of the secondary closing mechanism (11) is movably connected with a connecting mechanism (12), the bottom of the connecting mechanism (12) is movably connected with an electric power storage mechanism (13), the back of the electric power storage mechanism (13) is movably connected with a primary closing mechanism (14), the back of the primary closing mechanism (14) is fixedly connected with an electric wire inlet (15).

2. The medium-high voltage circuit breaker with isolated product-to-contact dislodging of claim 1, wherein: adjustment mechanism (10) include arc magnet (20), the surface of arc magnet (20) is connected with the surface fixed connection of regulating switch (3), the right side of arc magnet (20) is provided with rubber slab (21), the surface swing joint on the left surface of rubber slab (21) and arc magnet (20) right side, the internal surface swing joint of rubber slab (21) has iron core (22), the bottom fixedly connected with compression spring (23) of iron core (22), the right-hand member of compression spring (23) is provided with plumbing pole (24), plumbing pole (24) are located the outside of rubber slab (21).

3. The medium-high voltage circuit breaker with isolated product-to-contact dislodging of claim 1, wherein: second grade closing mechanism (11) package lever (30), the left end of lever (30) contacts with the bottom of hanging down pole (24), the right-hand member swing joint of lever (30) has connecting plate (31), the external fixed surface on connecting plate (31) right side is connected with activity bow-shaped plate (32), the right side of activity bow-shaped plate (32) is provided with fixed bow-shaped plate (33), the lower surface of fixed bow-shaped plate (33) is connected with the last fixed surface of bottom plate (1), the external fixed surface of fixed bow-shaped plate (33) is connected with wire (34).

4. The medium-high voltage circuit breaker with isolated product-to-contact dislodging of claim 1, wherein: electric power storage mechanism (13) include rectangular channel (40), rectangular channel (40) are seted up in the wall of bottom plate (1), the upper surface swing joint of bottom plate (1) has movable block (41), the upper surface of movable block (41) rotates and is connected with connection pad (42), the external surface fixedly connected with electric capacity (43) of connection pad (42), the outside of electric capacity (43) is provided with brush (44), the external surface swing joint of outer surface connection pad (42) of brush (44), the left surface and wire (34) fixed connection of brush (44).

5. The medium-high voltage circuit breaker with isolated product-to-contact dislodging of claim 1, wherein: the connecting mechanism (12) comprises an insulating plate (50), the lower surface of the insulating plate (50) is fixedly connected with the iron core (22) and the top end of the vertical rod (24), pull rods (51) are movably connected to the two sides of the insulating plate (50), fixing rods (52) are fixedly connected to the lower surfaces of the pull rods (51), the outer surfaces of the fixing rods (52) are rotatably connected with the outer surface of the movable block (41), a cam (53) is rotatably connected to the bottom end of the pull rod (51), and a screw rod (54) is fixedly connected to the outer surface of the cam (53).

6. The medium-high voltage circuit breaker with isolated product-to-contact dislodging of claim 1, wherein: one-level closing mechanism (14) is including sealed tube (55), the internal surface swing joint of sealed tube (55) has pop-up mechanism (56), the right side swing joint of pop-up mechanism (56) has fixed plate (58), the surface of fixed plate (58) is connected with the internal surface fixed connection of sealed tube (55), the right side of fixed plate (58) is provided with telescopic machanism (57), the surface of telescopic machanism (57) and the internal surface swing joint of sealed tube (55).

7. The medium-high voltage circuit breaker with isolated product-to-contact dislodging of claim 6, wherein: pop-up mechanism (56) includes metal pole (60), the surface swing joint of metal pole (60) has clamping bar (61), the surface swing joint on clamping bar (61) right side has lantern ring (62), the internal surface of lantern ring (62) and the surface sliding connection of metal pole (60), the left end fixedly connected with picture (63) of metal pole (60), the surface swing joint of picture (63) has slide (64), the internal surface swing joint of slide (64) has X type pole (65), the surface of slide (64) and the internal surface sliding connection of sealed tube (55).

8. The medium-high voltage circuit breaker with isolated product-to-contact dislodging of claim 6, wherein: telescopic machanism (57) include rubber ring (70), swing joint has swash plate (71) in the wall of rubber ring (70), thread groove (72) have been seted up to the internal surface of rubber ring (70), outer fixed surface on rubber ring (70) right side is connected with bracing piece (73).