CN217562461U - GIS is with two break isolator - Google Patents

Abstract

The utility model discloses a GIS is with two break isolator, including the casing, and set up two break switching device and gear actuating mechanism in every looks cavity of casing, two break switching device include two static contacts, movable contact base and can remove respectively and set up in two moving contacts of movable contact base inner chamber, and two break switching device still includes: the first guide device is arranged in the inner cavity of the movable contact base and close to the side of the break and is used for being matched with each movable contact; and the second guiding device is arranged in the inner cavity of the movable contact seat and far away from the side of the break and is used for being matched with each movable contact. Not only be close to the outage side for every moving contact through this scheme and be equipped with guider, but also keep away from the outage side for every moving contact and be equipped with guider, be equipped with dual removal direction for the both sides far and near of every moving contact, can make two outage moving contact transmission direction more steady and reliable, avoid the moving contact to produce the slope in the removal, ensure the good centering contact cooperation of moving contact and static contact.

Description

GIS is with two break isolator

Technical Field

The utility model relates to a GIS equipment technical field, in particular to GIS is with two break isolator.

Background

Usually, only one isolation fracture is arranged between GIS long-range expansion equipment and live-line operation equipment in the current period, power failure treatment needs to be carried out on the live-line operation equipment in the current period when later-period interval expansion butt joint installation, overhauling and on-site handover voltage-withstanding tests are carried out, personal injury caused by breakdown and discharge of the isolation fracture in the butt joint installation and the overhauling is prevented, and meanwhile, the safety accident that the discharge breakdown equipment is caused by reverse superposition of overvoltage at two ends of the isolation fracture in the on-site voltage-withstanding tests is avoided.

Along with the development of economy, the dependence on electric power and the requirement are gradually improved, the realization of the uninterrupted butt joint and the withstand voltage test is required when the GIS equipment is expanded, installed, maintained and subjected to the on-site withstand voltage test in the later period, and in order to realize the uninterrupted butt joint and the on-site withstand voltage test in the later period, a three-station and an isolating switch are usually installed on the equipment in the current period to form two fractures, so that the cost is high, and the occupied space is large.

In the existing double-fracture isolating switch, two moving contacts can be respectively movably arranged in an inner cavity of a moving contact seat and are converted into reciprocating linear motion of the moving contacts through the rotary motion of a gear, so that the two moving contacts are respectively contacted with or disconnected from two fixed contacts at the same time. However, the existing double-break disconnecting switch still has the following disadvantages:

1. only one end of the double-fracture moving contact is provided with a guide in the motion process, and the moving contact is easy to incline in the motion process, so that the centering of the moving contact and the static contact base is influenced;

2. the two moving contacts of the double fractures and the two fixed contacts on the other side of the fractures are not on the same axis, so that the structure is complex;

3. the surface of the moving contact is required to be provided with a rack after being provided with a notch, and the moving contact is complex in processing and structure;

4. the moving contact is installed on the disc insulator through the conductor, and the structure is complicated.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a GIS is with two break isolator not only is close to the break side for every moving contact and is equipped with guider, but also keeps away from the break side for every moving contact and is equipped with guider, be equipped with the double mobile direction for the far and near both sides of every moving contact, can make two break moving contact transmission direction more steady and reliable, avoid the moving contact to produce the slope in the removal, ensure the good centering contact cooperation of moving contact and static contact.

In order to achieve the above purpose, the utility model provides a following technical scheme:

the utility model provides a GIS is with two break isolator, includes the casing, and set up in two break switchgear and gear drive mechanism in every looks cavity of casing, two break switchgear include two static contacts, movable contact seat and can remove respectively set up in two moving contacts of movable contact seat inner chamber, two break switchgear still include:

the first guide device is arranged in the inner cavity of the movable contact base and close to the side of the cut-off and is used for being matched with each movable contact;

and the second guiding device is arranged on the inner cavity of the movable contact seat, is far away from the side of the break and is used for being matched with each movable contact.

Preferably, the inner cavity of the movable contact base and the inner cavities of the two fixed contacts are located on the same horizontal line;

the two fixed contacts are respectively positioned on two sides of the inner cavity of the movable contact base along the horizontal line; the two moving contacts can respectively move along the horizontal line and are arranged in the inner cavity of the moving contact seat, and the gear driving mechanism drives the moving contacts to synchronously move in the reverse direction and synchronously move in the opposite direction along the horizontal line.

Preferably, each moving contact comprises an L-shaped transmission frame and a moving contact body;

the long side part of one of the two L-shaped transmission frames is transversely arranged above a gear of the gear driving mechanism and is meshed with the top of the gear, the short side part is positioned on one side of the gear and is vertically connected with the corresponding movable contact body, the long side part of the other one of the two L-shaped transmission frames is transversely arranged below the gear and is meshed with the bottom of the gear, and the short side part is positioned on the other side of the gear and is vertically connected with the corresponding movable contact body; the two moving contact bodies can be conducted through the moving contact seat.

Preferably, the first guide means comprises:

the guide ring is arranged in the inner cavity of the movable contact base and close to the fracture side and is used for being matched with the outer peripheral wall of each movable contact body;

the second guide device includes:

and the guide wheels are arranged on the inner cavity of the movable contact base far away from the side of the fracture and are used for being matched with the outer wall of the long edge part of each L-shaped transmission frame.

Preferably, the number of the guide wheels is two, and the guide wheels are respectively positioned above and below the gear.

Preferably, the double break switch device further comprises two conductor holders;

the two conductor seats are respectively arranged at two ends of the movable contact seat and are respectively provided with an inner cavity for penetrating through the movable contact body; the two guide rings are arranged on the inner cavity walls of the two conductor seats in a one-to-one correspondence mode.

Preferably, the inner wall of the long side part of the L-shaped transmission frame is provided with a rack which is used for being matched with the top or the bottom of the gear.

Preferably, the movable contact body is a cylindrical movable contact;

the short edge part of the L-shaped transmission frame is of a disc structure, a boss which is used for being matched with the inner cavity of the end part of the cylindrical movable contact in a positioning mode is arranged in the middle of the disc structure, and the boss is in threaded connection with the inner cavity of the end part of the cylindrical movable contact.

Preferably, a post insulator is also included; the post insulator is provided with a through cavity;

the post insulators are arranged in each phase cavity of the shell, and the top ends of the cavities of the post insulators are connected with the bottom ends of the movable contact bases through inserts.

Preferably, the top end of the movable contact base is of a mushroom-shaped structure.

According to the technical scheme, the utility model provides a GIS is with two break isolator not only is equipped with guider for every moving contact is close to the break side, but also keeps away from the break side for every moving contact and is equipped with guider, is exactly equipped with the direction of dual removal for the far and near both sides of every moving contact, can make two break moving contact transmission direction more steady and reliable, avoids the moving contact to produce the slope in the removal, ensures the good centering contact cooperation of moving contact and static contact.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is an appearance schematic diagram of a double-break isolating switch for a GIS provided by an embodiment of the present invention;

FIG. 2 isbase:Sub>A cross-sectional view A-A of FIG. 1;

FIG. 3 is a cross-sectional view B-B of FIG. 2 (the dual isolated break simultaneously broken away condition);

FIG. 4 is a sectional view taken along line B-B of FIG. 2 (the double isolated fractures are simultaneously in the on state);

fig. 5 is a schematic view illustrating an assembly of a post insulator and an insert according to an embodiment of the present invention;

fig. 6 is an assembly cross-sectional view of a post insulator and an insert provided by an embodiment of the present invention.

The device comprises a shell, a first cover plate, a movable contact seat, a conductor seat, a fixed contact, a first three-phase box-divided GIS element, a shielding cover, a guide ring, an L-shaped transmission frame, a gear, a guide wheel, a second three-phase box-divided GIS element, a density relay, an adsorbent, a first insulating transmission shaft, a second insulating transmission shaft, a mechanism, a grounding component, a second cover plate, a cavity and an insert, wherein the 1 is an air-insulated insulator, the 2 is the shell, the 3 is a post insulator, the 4 is an air guide plate, the 5 is the first cover plate, the 6 is the movable contact seat, the 7 is the movable contact seat, the 8 is the conductor seat, the 9 is the fixed contact, the 10 is the first three-phase box-divided GIS element, the 11 is the shielding cover, the 12 is the guide ring, the 13 is the L-shaped transmission frame, the 14 is the gear, the 15 is the guide wheel, the second three-phase box-divided GIS element, the 17 is the density relay, the adsorbent, the first insulating transmission shaft, the 20 is the second insulating transmission shaft, the mechanism, the 22 is the grounding component, the second cover plate, the cavity, the 24 is the cavity, and the insert 25.

Detailed Description

The utility model discloses a GIS is with two-break isolator device, two isolation fracture and a ground connection fracture of internal design, two moving contacts of two-break isolator adopt the linear motion structural design, and two moving contacts, two static contacts and isolation fracture all are on a straight line, two isolation fractures realize through an operating mechanism (be gear drive mechanism) that "two isolation fracture put through simultaneously", "two isolation fracture break off simultaneously" the conversion of two kinds of states, satisfy GIS later stage extension butt joint, maintenance and on-the-spot withstand voltage test demand of not cutting off power.

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The embodiment of the utility model provides a GIS is with two break isolator, as shown in fig. 1 to fig. 3, including casing 2, and set up two break switching device and gear drive mechanism in every looks cavity 24 of casing 2, two break switching device include two static contacts 9, movable contact base 6 and can remove respectively and set up in two moving contacts 7 of 6 inner chambers of movable contact base, and two break switching device still include:

a first guiding device which is arranged in the inner cavity of the movable contact base 6 and close to the side of the cut-off and is used for being matched with each movable contact 7;

and the second guide device is arranged on the inner cavity of the movable contact base 6 far away from the cut-off side and is used for being matched with each movable contact 7.

It should be noted that the two moving contacts 7 are respectively engaged with the top and the bottom of the gear driving mechanism gear 14, so that the gear 14 drives the two moving contacts 7 to synchronously move in opposite directions and synchronously move in opposite directions, so that the two moving contacts 7 move out of the inner cavity of the moving contact base 6 to be in one-to-one contact with the two fixed contacts 9 simultaneously, or the two moving contacts 7 move back to the inner cavity of the moving contact base 6 to be disconnected from the two fixed contacts 9 simultaneously in one-to-one contact. In addition, the first guiding devices are respectively arranged at two ends of the inner cavity of the movable contact base 6 and are used for being matched with the two movable contacts 7 in a one-to-one correspondence manner, and the second guiding devices are respectively arranged on the upper cavity wall and the lower cavity wall of the middle position of the inner cavity of the movable contact base 6 and are used for being matched with the two movable contacts 7 in a one-to-one correspondence manner. That is to say, this scheme not only is equipped with guider for every moving contact 7 is close to the outage side, but also keeps away from the outage side for every moving contact 7 and is equipped with guider, and this scheme is equipped with the double movement direction for the both sides far and near of every moving contact 7 promptly to make the transmission direction of double fracture moving contact 7 more steady reliable, ensure that moving contact 7 centering inserts static contact 9.

According to the above technical scheme, the embodiment of the utility model provides a GIS is with two break isolator not only is equipped with guider for every moving contact is close to the break side, but also keeps away from the break side for every moving contact and is equipped with guider, be equipped with the double mobile direction for the far and near both sides of every moving contact, can make two break moving contact transmission direction steady more and reliable, avoid the moving contact to produce the slope in the removal, ensure the good centering contact cooperation of moving contact and static contact.

In the scheme, as shown in fig. 3, the inner cavity of the moving contact base 6 and the inner cavities of the two fixed contacts 9 are all located on the same horizontal line;

the two static contacts 9 are respectively positioned at two sides of the inner cavity of the movable contact base 6 along the horizontal line; the two moving contacts 7 can be respectively arranged in the inner cavity of the moving contact base 6 in a movable manner along the horizontal line, and are driven by the gear driving mechanism to synchronously move in a reverse direction and synchronously move in opposite directions along the horizontal line, so that the two moving contacts 7 are moved out of the inner cavity of the moving contact base 6 to be simultaneously contacted with the two fixed contacts 9 in a one-to-one correspondence manner, or the two moving contacts 7 are moved back to the inner cavity of the moving contact base 6 to be simultaneously disconnected with the two fixed contacts 9 in a one-to-one correspondence manner. The design of this scheme to make the moving contact 7 of double fracture and the static contact 9 of double fracture both sides be located same water flat line, distribute on same axis promptly. The design of the scheme can lead the double-break switch device to have compact structure, simplicity and reliability.

Specifically, as shown in fig. 3, each movable contact 7 includes an L-shaped transmission frame 13 and a movable contact body;

the long edge part of one of the two L-shaped transmission frames 13 is transversely arranged above the gear 14 of the gear driving mechanism and is meshed with the top of the gear 14, the short edge part is positioned on one side of the gear 14 and is vertically connected with the corresponding moving contact body, the long edge part of the other one of the two L-shaped transmission frames is transversely arranged below the gear 14 and is meshed with the bottom of the gear 14, and the short edge part is positioned on the other side of the gear 14 and is vertically connected with the corresponding moving contact body; the two moving contact bodies can be conducted through the moving contact seat 6. This scheme so design to make every moving contact 7 adopt the split type structure of equipment, wherein through L type driving frame 13 and the meshing of gear 14, avoid moving contact body processing incision installation rack. In addition, the inner wall of the long side portion of the L-shaped transmission frame 13 is provided with a rack for engaging with the top or bottom of the gear 14. As shown in fig. 3, the inner wall of the upper L-shaped transmission frame long side portion is a lower wall of the long side portion, and the inner wall of the lower L-shaped transmission frame long side portion is an upper wall of the long side portion.

Further, as shown in fig. 3, the first guide means includes:

a guide ring 12 which is arranged in the inner cavity of the movable contact base 6 and is close to the cut-off side and is used for being matched with the peripheral wall of each movable contact body; the number of the guide rings 12 is two, and the two guide rings 12 are respectively arranged at two ends of the inner cavity of the movable contact base 6 and are used for being correspondingly matched with the outer peripheral walls of the two movable contact bodies one by one;

the second guiding device comprises:

and the guide wheels 15 are arranged at the inner cavity side of the movable contact base 6 far away from the cut-off side and are used for being matched with the outer wall of the long edge part of each L-shaped transmission frame 13. As shown in fig. 3, the outer wall of the upper L-shaped frame long side portion is an upper wall of the long side portion, and the outer wall of the lower L-shaped frame long side portion is a lower wall of the long side portion. That is to say, in the scheme, a guide ring 12 is arranged on the moving contact body of each moving contact 7, a guide wheel 15 is arranged on the L-shaped transmission frame 13, so that the transmission guide of the double-fracture moving conductor is more stable and reliable; and two guider of this scheme so design have simple structure, easily design and install characteristics such as convenient.

Still further, as shown in fig. 3, the guide wheels 15 are two in number and located above and below the gear 14, respectively. This scheme is so designed to make L type driving frame 13 long limit portion install between leading wheel 15 and gear 14, thereby can make every moving contact 7 keep away from the direction of disconnection side more steady reliable.

In this solution, as shown in fig. 3, the double break switch device further comprises two conductor holders 8;

the two conductor seats 8 are respectively arranged at two ends of the movable contact seat 6 and are respectively provided with an inner cavity for penetrating through the movable contact body; that is, each moving contact body is conducted with the moving contact seat 6 through the conductor seat 8 where the moving contact body is located, so that the two moving contacts 7 are ensured to be conducted with each other; the two guide rings 12 are disposed on the inner cavity walls of the two conductor holders 8 in a one-to-one correspondence. The two guide rings 12 and the two conductor seats 8 may be pre-installed as two components in a one-to-one correspondence, and then the two components are respectively installed at the two ends of the movable contact seat 6, thereby facilitating the convenient installation of the guide rings 12.

In order to further optimize the technical scheme, as shown in fig. 3, the moving contact body is a cylindrical moving contact;

the short edge part of the L-shaped transmission frame 13 is of a disc structure, a boss which is used for being matched with the inner cavity of the end part of the cylindrical movable contact in a positioning mode is arranged in the middle of the disc structure, and the boss is in threaded connection with the inner cavity of the end part of the cylindrical movable contact. This scheme so design to realize L type driving frame 13 and moving contact body's quick positioning assembly and be connected.

Further, as shown in fig. 3, the double-break isolating switch for a GIS provided by the embodiment of the present invention further includes a post insulator 3; as shown in fig. 5 and 6, the post insulator 3 is provided with a through cavity;

the post insulator 3 is arranged in each phase cavity 24 of the shell 2, and the top end of the cavity is connected with the bottom end of the movable contact base 6 through an insert 25. That is, in this embodiment, the movable contact base 6 is insulated from the ground by the post insulator 3, and the movable contact base 6 is connected by the insert 25 at the top end of the post insulator 3. Wherein, this scheme adopts post insulator 3 to replace original disc insulator, and its cost economic nature is good, simple structure is compact. In addition, the insert 25 is poured (glued) on the top end of the cavity of the post insulator 3, and the post insulator 3 is provided with the cavity, that is, the inside of the post insulator 3 is a hollow structure, so as to provide an operation space for fixedly mounting the post insulator 1 (that is, the insert 25) and the movable contact base 6, and facilitate the mounting and dismounting of the two (bolt connection).

Still further, as shown in fig. 3, the top end of the moving contact base 6 is of a mushroom-type structure so as to be used as a hanging point when the moving contact base 6 is installed, and to facilitate assembly.

The present solution is further described below with reference to specific embodiments:

the utility model discloses a GIS is with two break isolator, as shown in fig. 1 to fig. 4, mainly include casing, gas shield insulator, static contact, moving contact, driving frame (L type driving frame promptly), moving contact seat, post insulator, guide ring, leading wheel, insulating transmission shaft, mechanism and ground connection subassembly etc..

The double-break isolating switch is designed into an independent air chamber through the air-insulated insulator 1.

Rated pressure SF6 gas is filled in the double-fracture isolating switch gas chamber, a sequence number density relay 17 and an adsorbent 18 are installed, the density relay 17 monitors the pressure and other conditions of the SF6 gas in the switch device gas chamber in real time, and the adsorbent 18 ensures that the micro-water content of the SF6 gas in the double-fracture isolating switch is qualified.

One end of a shell 2 of the double-fracture isolating switch is respectively connected with a first three-phase box GIS element 10 through a gas-insulated insulator 1, and the other end of the shell is respectively connected with a second three-phase box GIS element 16 through the gas-insulated insulator 1; a second cover plate 23 is arranged at the left end of the shell 1, a density relay 17 is arranged on the second cover plate 23, and an adsorbent 18 is arranged in the second cover plate 23; the mechanism 21 is mounted at the right end of the housing 1.

The static contact 9 is directly and fixedly arranged on the air-insulated insulator 1 through a standard component.

The mushroom-shaped appearance design at the upper end of the movable contact base 6 can be used as a hanging point during installation, and the assembly is convenient; the lower end is connected with a post insulator 3, the movable contact base is insulated from the ground by the post insulator 3, an insert is designed at the upper end of the post insulator, the inner part of the post insulator is designed to be a hollow structure, the movable contact base 6 is connected with the insert at the upper end of the post insulator 3, the post insulator replaces the design of a disc insulator, the cost and the economy are good, the hollow structure design in the post insulator 3 provides an operation port for fixedly installing the post insulator 3 and the movable contact base 6, and the installation and the disassembly are convenient; the lower end of the post insulator 3 is fixedly arranged on the air guide plate 4, an air guide groove is designed on the air guide plate, and the SF6 gas flows into the inner cavity of the post insulator through the air guide groove to play an insulating role; the left end and the right end of the movable contact base 6 are respectively provided with a conductor base 8, a guide ring 12 is arranged in the conductor base 8, and a shielding cover 11 is arranged outside the conductor base 8; the moving contact 7 is arranged in the moving contact seat 6, the moving contact 7 is connected with the transmission frame through threads, the transmission frame is meshed with the gear 14, and the guide wheel 15 is arranged on the surface of the transmission frame in a design mode.

The double-break isolating switch of the scheme realizes that the double-break moving contact and the static contacts on two sides of the double break are on the same axis, and has compact, simple and reliable structure; the double-fracture moving contact is provided with the transmission frame, so that a notch is prevented from being generated on the surface of the conductor to install the rack; a guide ring is designed on the moving contact close to the fracture side, and a guide wheel is designed on the moving contact far away from the fracture side, so that the transmission guide of the double-fracture moving conductor is more stable and reliable; the movable contact base and the grounding contact base are of an integrated structure, and the mushroom-shaped appearance design of the movable contact base can be used as a hanging point during installation, so that the assembly is convenient; the movable contact seat is insulated from the ground end by designing the post insulator, the insert is poured at the upper end of the post insulator, the inner part of the post insulator is designed to be a hollow structure, the movable contact seat is connected through the insert at the upper end of the post insulator, the cost and the economy are good, the hollow structure design provides an operation port for fixedly mounting the post insulator and the movable contact seat, and the mounting and the dismounting are convenient; the gas guide groove is designed on the cover plate at the lower end of the post insulator, and SF6 gas flows into the inner cavity of the post insulator through the gas guide groove to achieve the insulating effect.

The inner conductor of the grounding assembly 22 realizes the opening and closing of the grounding fracture through movement.

The gear 14 is connected to a first insulated transmission shaft 19 and a second insulated transmission shaft 20, and the other end of the second insulated transmission shaft 20 is connected to a mechanism 21.

The operation of the motor in the mechanism 21 drives the second insulation transmission shaft 20, the gear 14 and the first insulation transmission shaft 19 to rotate, the gear 14 rotates to engage with the transmission plate, so that the moving contacts 7 make linear motion, and the two moving contacts move simultaneously, i.e. the double-break disconnecting switch realizes opening and closing simultaneously.

The first three-phase box-divided GIS element 10 and the second three-phase box-divided GIS element 16 are conducted and the grounding break is opened, as shown in fig. 4. The first three-phase box-splitting GIS element 10 is disconnected from the second three-phase box-splitting GIS element 16, forming two isolation fractures and the grounding fracture is closed, as shown in fig. 3.

The state of installing a double-break isolating switch on the GIS equipment at the present stage is shown in FIG. 3, namely two reliable isolating breaks are formed between the first three-phase box-divided GIS element 10 and the second three-phase box-divided GIS element 16, and the grounding break is closed, so that the later stage extension butt joint and the field withstand voltage test can be realized without power failure; when the state of the double-break disconnecting switch is as shown in fig. 4, namely two reliable isolating breaks are switched on and the grounding break is switched off, the equipment is in a live-line running state after the GIS extension butt joint installation is completed.

In the present specification, the embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. A double-break isolating switch for GIS comprises a shell (2), and a double-break switch device and a gear driving mechanism which are arranged in each phase cavity (24) of the shell (2), wherein the double-break switch device comprises two fixed contacts (9), a movable contact base (6) and two movable contacts (7) which can be respectively movably arranged in the inner cavity of the movable contact base (6), and is characterized in that the double-break switch device further comprises:

the first guide device is arranged on the inner cavity of the movable contact base (6) close to the side of the cut-off and is used for being matched with each movable contact (7);

and the second guiding device is arranged in the inner cavity of the movable contact base (6) far away from the cut-off side and is used for being matched with each movable contact (7).

2. The double-break isolating switch for the GIS according to claim 1, wherein the inner cavity of the movable contact base (6) and the inner cavities of the two fixed contacts (9) are all located on the same horizontal line;

the two fixed contacts (9) are respectively positioned on two sides of the inner cavity of the movable contact base (6) along the horizontal line; the two moving contacts (7) can respectively move along the horizontal line and are arranged in the inner cavity of the moving contact base (6), and the gear driving mechanism drives the moving contacts to synchronously move in the reverse direction and synchronously move in the opposite direction along the horizontal line.

3. The double break disconnector for GIS according to claim 2, wherein each of the movable contacts (7) comprises an L-shaped transmission frame (13) and a movable contact body;

one long edge part of the two L-shaped transmission frames (13) is transversely arranged above a gear (14) of the gear driving mechanism and is meshed with the top of the gear (14), the short edge part is positioned on one side of the gear (14) and is vertically connected with the corresponding movable contact body, the other long edge part is transversely arranged below the gear (14) and is meshed with the bottom of the gear (14), and the short edge part is positioned on the other side of the gear (14) and is vertically connected with the corresponding movable contact body; the two moving contact bodies can be conducted through the moving contact seat (6).

4. The double break disconnector for GIS according to claim 3, wherein the first guide means comprises:

the guide ring (12) is arranged in the inner cavity of the movable contact base (6) close to the cut-off side and is used for being matched with the outer peripheral wall of each movable contact body;

the second guide device comprises:

and the guide wheel (15) is arranged on the inner cavity of the movable contact base (6) far away from the cut-off side and is used for being matched with the outer wall of the long edge part of each L-shaped transmission frame (13).

5. The double break disconnector for GIS according to claim 4, characterized in that the number of the guide wheels (15) is two and is located above and below the gear wheel (14), respectively.

6. The double break disconnector for GIS according to claim 4, characterized in that it further comprises two conductor holders (8);

the two conductor seats (8) are respectively arranged at two ends of the movable contact seat (6) and are respectively provided with an inner cavity for penetrating through the movable contact body; the two guide rings (12) are correspondingly arranged on the inner cavity walls of the two conductor seats (8) one by one.

7. The double-break disconnecting switch for the GIS according to claim 3, characterized in that the inner wall of the long side part of the L-shaped transmission frame (13) is provided with a rack for matching with the top or the bottom of the gear (14).

8. The double-break disconnecting switch for the GIS according to claim 7, wherein the moving contact body is a cylindrical moving contact;

the short side part of the L-shaped transmission frame (13) is of a disc structure, a boss which is used for being matched with the inner cavity of the end part of the cylindrical movable contact in a positioning mode is arranged in the middle of the disc structure, and the boss is in threaded connection with the inner cavity of the end part of the cylindrical movable contact.

9. The double break disconnector for GIS according to claim 1, further comprising a post insulator (3); the post insulator (3) is provided with a through cavity;

the post insulator (3) is arranged in each phase cavity (24) of the shell (2), and the top end of the cavity of the post insulator is connected with the bottom end of the movable contact base (6) through an insert (25).

10. The double-break disconnecting switch for the GIS according to claim 1, characterized in that the top end of the moving contact base (6) is mushroom-shaped.

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