CN112271099A

CN112271099A - High-voltage isolating switch

Info

Publication number: CN112271099A
Application number: CN202011087878.5A
Authority: CN
Inventors: 罗绍弟
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-10-13
Filing date: 2020-10-13
Publication date: 2021-01-26

Abstract

The invention relates to the technical field of electric power facilities, and discloses a high-voltage isolating switch which comprises two fixed beams and insulators, wherein the two insulators are symmetrically installed in the left and right direction, connecting ends are fixedly installed at the tops of the two insulators, a right knife switch is fixedly installed on the left side of the right connecting end, and a left knife switch is fixedly installed on the right side of the left connecting end. Through arc carousel and slide device's setting, make when arc carousel rotation angle is 90 degrees, promote two slide devices to the both sides promotion by the first section arc of arc carousel, and loop through insulator and link and slowly take the right brake-blade away from the contact contactor, then when right brake-blade and contact contactor are about to break away from, slide device and arc carousel's second section arc contact, and then realize promoting slide device and remove to the both sides fast, and drive the right brake-blade and break away from with the contact contactor fast, effectively prevent the appearance of arc light, the safety of guarantee circuit.

Description

High-voltage isolating switch

Technical Field

The invention relates to the technical field of electric power facilities, in particular to a high-voltage isolating switch.

Background

The high-voltage isolating switch is an important switching device in an electric system of a power plant and a transformer substation, and needs to be matched with a high-voltage circuit breaker for use, high-voltage equipment is connected, disconnected or switched on under the conditions of voltage and load, the main function of the high-voltage isolating switch is to ensure the safety of the high-voltage equipment and the device during maintenance work, the high-voltage isolating switch plays a role in isolating voltage, cannot be used for disconnecting, inputting load current and disconnecting short-circuit current, and can only be used for certain switching operations without generating strong electric arcs, but some current high-voltage isolating switches have some defects as follows:

an insulating pillar of a GW4 type high-voltage isolating switch plays a role in supporting and driving, the pulling force of a lead and the resistance in closing act on the insulating pillar together to generate a rotating torque, when a driving part is rusted or is not properly installed and matched in operation, and the driving process of the insulating pillar is retarded, the insulating pillar is influenced by an additional torque to cause a larger resistance , so that the insulating pillar is broken, a circuit is short-circuited or even ignited, and huge loss is caused, meanwhile, when the insulating pillar is opened, a lacing line needs to be slowly separated from a fixed contact at the beginning, when a blade lacing line is about to leave the fixed contact, but because the existing driving mechanism cannot accurately distinguish and control the separating speed, arc light is easily generated in the separating process, hidden dangers are brought to the safety of the circuit, and likewise, when the closing process is carried out, the closing speed cannot be controlled, and collision is easy to happen at the end, causing damage to the equipment, deformation of the mechanism and breakage of the insulator.

Disclosure of Invention

The invention provides a high-voltage isolating switch, which has the advantages of simple structure and high safety and solves the problems in the background technology.

The invention provides the following technical scheme: a high-voltage isolating switch comprises a fixed beam and insulators, wherein the insulators are symmetrically installed in the left and right directions, connecting ends are fixedly installed at the tops of the two insulators, a right knife switch is fixedly installed at the left side of the connecting ends on the right side, a left knife switch is fixedly installed at the right side of the connecting ends on the left side, a central shaft is movably sleeved at the middle of the fixed beam, an arc-shaped turntable is fixedly installed at the top of the central shaft, sliding devices are movably clamped on the two sides of the arc-shaped turntable on the fixed beam respectively, the upper surfaces of the two sliding devices and one end far away from the central shaft are fixedly connected with the insulators, a double-sided rack is movably installed at the bottom of the fixed beam and at the right side of the central shaft, the double-sided rack is movably connected with the central shaft, a driving gear is movably installed at the bottom of the, the left end fixed mounting of right side plug-in strip has stop device, the right-hand member fixed mounting of left side plug-in strip has the contact contactor.

Preferably, the arc carousel has two arcs and uses the center pin evenly distributed as the center, arc one side of arc carousel comprises both ends arc.

Preferably, the limiting device comprises a fixed frame, the fixed frame is fixedly connected with the right knife switch through an insulating connecting piece, the fixed frame is symmetrically and fixedly provided with a first magnet, the first magnet is uniformly and fixedly provided with a second spring, the top end of the second spring is fixedly connected with a movable plate, the right end of the movable plate is movably connected with the top end of the fixed frame, and the movable plate and the horizontal plane form an included angle of 5-15 degrees;

the contact contactor comprises a protective cover, a fixed connecting rod is fixedly mounted at the right end of the left switch blade, a contact connecting plate is fixedly connected to the fixed connecting rod, the contact connecting plate is fixedly connected with the left switch blade through the fixed connecting rod, the fixed connecting rod is fixedly connected with the protective cover, and a magnet II is fixedly mounted on the right side of the protective cover, which is located on the fixed connecting rod.

Preferably, the center pin includes the loose axle, the loose axle cup joints with the fixed beam activity, the bottom fixed mounting of loose axle has drive gear, drive gear and the left side rack toothing of two-sided rack.

Preferably, the sliding device comprises a sliding plate, a first rolling wheel is movably mounted at one end of the sliding plate close to the central shaft, a lock catch is fixedly mounted at the top of one end of the sliding plate close to the central shaft, the first rolling wheel is movably connected with the outer wall of the arc-shaped rotating disc, and the lock catch is movably connected with the inner wall of the arc-shaped rotating disc.

Preferably, the hasp includes fixed square shaft, fixed square shaft be square and with the last fixed surface of sliding plate be connected, the epaxial activity joint of fixed square has the drag link, the one end movable mounting that the drag link is close to the arc carousel has rolling wheel two, rolling wheel two and arc carousel swing joint, the inside fixedly connected with spring one that keeps away from one side of arc carousel and be located the drag link of fixed square shaft.

The invention has the following beneficial effects:

1. through the arrangement of the arc-shaped turntable and the sliding device, when the rotation angle of the arc-shaped turntable is 90 degrees, the first section of arc of the arc turntable pushes the two sliding devices to push towards two sides, and the right knife switch is slowly taken away from the contact contactor through the insulator and the connecting end in sequence, then when the right knife switch is about to be separated from the contact contactor, the sliding device is contacted with the second section of arc of the arc-shaped rotating disc, thereby realizing the pushing of the sliding device to move towards two sides rapidly and driving the right knife switch to be separated from the contact contactor rapidly, effectively preventing the occurrence of arc light, ensuring the safety of the circuit, simultaneously, the arc carousel promotes the slider and carries out horizontal migration for right knife switch and contact contactor are the separation of parallel straight line, reduce the power of applying to the insulator, reduce the moment of torsion of insulator, ensure the safe in utilization of insulator, increase the service life of insulator, reduce cost of maintenance.

2. Through the setting of stop device and contact contactor for when right knife switch is close to gradually with contact contactor, the front end of fly leaf at first with the inner wall contact of protection casing, the protection casing exerts a clamp force to the fly leaf, compress spring two, with this damping, so that reduce the collision when closing a floodgate, prevent equipment damage, the mechanism damages, improve the security of insulator, simultaneously close a floodgate and finish can inter attraction between magnet two and magnet one, be connected between reinforcing contact contactor and the stop device, guarantee connection stability, reinforcing structural strength.

Drawings

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

FIG. 2 is a schematic view of the present invention in a top view of the assembly;

FIG. 3 is a schematic top view of the structure of the present invention;

FIG. 4 is a side view partially in schematic form of the structure of the present invention;

FIG. 5 is an enlarged view of the point A in FIG. 1;

FIG. 6 is an enlarged view of the point B in FIG. 1;

FIG. 7 is an enlarged view of the point C in FIG. 3 according to the present invention.

In the figure: 1. a fixed beam; 2. a central shaft; 21. (ii) a A movable shaft; 22. a transmission gear; 3. an arc-shaped turntable; 4. a runner; 41. a slide plate; 42. a first rolling wheel; 43. locking; 431. fixing the square shaft; 432. a tie rod; 433. a first spring; 434. a second rolling wheel; 5. an insulator; 6. a double-sided rack; 7. a driving gear; 8. a connecting end; 9. a right knife switch; 10. a limiting device; 101. a fixed mount; 102. a magnet I; 103. a second spring; 104. a movable plate; 11. a left knife switch; 12. a contact contactor; 121. a protective cover; 122. a contact connecting plate; 123. a fixed connecting rod; 124. and a second magnet.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-7, a high voltage isolation switch comprises a fixed beam 1 and insulators 5, wherein two insulators 5 are symmetrically installed in a left-right direction, a connecting end 8 is fixedly installed at the top of each insulator 5, a right knife switch 9 is fixedly installed at the left side of the right connecting end 8, a left knife switch 11 is fixedly installed at the right side of the left connecting end 8, a central shaft 2 is movably sleeved at the middle part of the fixed beam 1, an arc-shaped turntable 3 is fixedly installed at the top of the central shaft 2, sliding devices 4 are respectively and movably clamped on the fixed beam 1 and positioned at two sides of the arc-shaped turntable 3, one ends of the upper surfaces of the two sliding devices 4 far away from the central shaft 2 are fixedly connected with the insulators 5, a double-sided rack 6 is movably installed at the bottom of the fixed beam 1 and positioned at the right side of the central shaft 2, the double-sided rack 6 is movably connected with the, the right side of the double-sided rack 6 is meshed with the driving gear 7, the left end of the right knife switch 9 is fixedly provided with a limiting device 10, and the right end of the left knife switch 11 is fixedly provided with a contact contactor 12.

Wherein, arc carousel 3 has two arcs and uses center pin 2 as center evenly distributed, arc carousel 3's arc one side comprises both ends arc, when 3 rotation angles of arc carousel are below 90 degrees, promote two sliding device 4 to both sides promotion by first section arc, and loop through insulator 5 and link 8 with right plug-in strip 9 slowly take away from contact contactor 12, then when being about to break away from at right plug-in strip 9 and contact contactor 12, sliding device 4 contacts with the second section arc of arc carousel 3, and then realize promoting sliding device 4 and remove to both sides fast, and drive right plug-in strip 9 and contact contactor 12 break away from fast, reduce the appearance of arc light, ensure the safety of circuit.

The limiting device 10 comprises a fixed frame 101, the fixed frame 101 is fixedly connected with the right knife switch 9 through an insulating connecting piece, first magnets 102 are symmetrically and fixedly mounted on the fixed frame 101, second springs 103 are uniformly distributed and fixedly mounted on the first magnets 102, the top ends of the second springs 103 are fixedly connected with a movable plate 104, the right end of the movable plate 104 is movably connected with the top end of the fixed frame 101, and the movable plate 104 forms an included angle of 5-15 degrees with the horizontal plane;

the contact contactor 12 comprises a protective cover 121, a fixed connecting rod 123 is fixedly installed at the right end of the left switch blade 11, a contact connecting plate 122 is fixedly connected to the fixed connecting rod 123, the contact connecting plate 122 is fixedly connected to the left switch blade 11 through the fixed connecting rod 123, the fixed connecting rod 123 is fixedly connected to the protective cover 121, a second magnet 124 is fixedly installed on the protective cover 121 and located on the right side of the fixed connecting rod 123, when the right switch blade 9 and the contact contactor 12 gradually approach, the front end of the movable plate 104 contacts with the inner wall of the protective cover 121 and receives transverse resistance to decelerate, when the right switch blade 9 rapidly approaches the contact connecting plate 122, the second magnet 122 can be slowly inserted into the contact connecting plate 122, collision during switching-on is reduced, equipment damage and mechanism damage are prevented, the safety of the insulator is improved, meanwhile, the second magnet 124 and the first magnet 102 can attract each other, and the, and connection stability is ensured.

Wherein, center pin 2 includes loose axle 21, and loose axle 21 cup joints with fixed beam 1 activity, and the bottom fixed mounting of loose axle 21 has drive gear 22, and drive gear 22 and the left side rack toothing of double-sided rack 6 drive by driving gear 7, and then drive center pin 2 and rotate for can carry out power transmission to three high-voltage switch of group through driving gear 7.

Wherein, slider 4 includes slide plate 41, the one end movable mounting that slide plate 41 is close to center pin 2 has a roll wheel 42, slide plate 41 is close to the one end top fixed mounting of center pin 2 has a hasp 43, roll wheel 42 and arc carousel 3's outer wall swing joint, hasp 43 and arc carousel 3's inner wall swing joint, rotation through arc carousel 3, and then promote slider 4 and slide on fixed beam 1, make the parallel sharp separation of right knife switch 9 and contact contactor 12, reduce the moment of torsion of insulator 5, ensure the safety in utilization of insulator 5, increase the service life of insulator 5.

Wherein, hasp 43 includes fixed square shaft 431, fixed square shaft 431 be square and with the last fixed surface of sliding plate 41 be connected, the activity joint has tie-rod 432 on the fixed square shaft 431, tie-rod 432 is close to the one end movable mounting of arc carousel 3 has rolling wheel two 434, rolling wheel two 434 and arc carousel 3 swing joint, the one side of keeping away from arc carousel 3 of fixed square shaft 431 and the inside fixedly connected with spring 433 that is located tie-rod 432, can be connected slider 4 and arc carousel 3, so that when the return stroke was closed, arc carousel 3 still can pull back slider 4.

Operating principle, switching off: firstly, the driving gear 7 drives the double-sided rack 6 to transmit, and further drives the central shaft 2 to rotate, so that the arc-shaped turntable 3 rotates by 90 degrees at first, the first arc of the arc-shaped turntable 3 pushes the two sliding devices 4 to slide on the fixed beam 1 to two sides, and the right knife switch 9 is slowly taken away from the contact connecting plate 122 through the insulator 5 and the connecting end 8 in sequence, and then when the right knife switch 9 is about to be separated from the contact contactor 12, the sliding devices 4 are in arc contact with the second arc of the arc-shaped turntable 3, so that the sliding devices 4 are pushed to move to two sides quickly, and the right knife switch 9 is driven to be separated from the contact connecting plate 122 quickly, the rotation angle of the arc-shaped turntable 3 can be stopped at 175 degrees, at the moment, the distance between the right knife switch 9: the arc-shaped rotating disc 3 rotates reversely through the driving gear 7, the double-sided rack 6 and the central shaft 2 in sequence, the reverse rotation is opposite to the closing process, the right knife switch 9 and the contact contactor 12 are rapidly close to each other and then are decelerated, when the right knife switch 9 and the contact contactor 12 are gradually close to each other, the front end of the movable plate 104 is firstly in contact with the inner wall of the protective cover 121, the protective cover 121 exerts a clamping force on the movable plate 104, the second spring 103 is compressed, vibration is reduced, meanwhile, an attractive force exists between the second magnet 124 and the first magnet 102, and the structural connection stability is enhanced.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a high-voltage isolating switch, includes fixed beam (1) and insulator (5), insulator (5) have two and bilateral symmetry to install, two the top fixed mounting of insulator (5) has link (8), the right the left side fixed mounting of link (8) has right plug-in strip (9), the left side the right side fixed mounting of link (8) has left plug-in strip (11), its characterized in that: the middle part of the fixed beam (1) is movably sleeved with a center shaft (2), the top of the center shaft (2) is fixedly provided with an arc-shaped turntable (3), the two sides of the arc-shaped turntable (3) on the fixed beam (1) are movably clamped with sliding devices (4) respectively, the upper surfaces of the two sliding devices (4) are fixedly connected with one end of an insulator (5) far away from the center shaft (2), the bottom of the fixed beam (1) is movably provided with a double-sided rack (6) on the right side of the center shaft (2), the double-sided rack (6) is movably connected with the center shaft (2), the bottom of the fixed beam (1) is movably provided with a driving gear (7) on the right side of the double-sided rack (6), the right side of the double-sided rack (6) is meshed with the driving gear (7), and the left end of the right brake blade (9) is fixedly provided with a, and a contact contactor (12) is fixedly arranged at the right end of the left knife switch (11).

2. A high voltage isolator as claimed in claim 1, wherein: arc carousel (3) have two arcs and use center pin (2) as center evenly distributed, arc one side of arc carousel (3) comprises both ends arc.

3. A high voltage isolator as claimed in claim 1, wherein: the limiting device (10) comprises a fixed frame (101), the fixed frame (101) is fixedly connected with the right knife switch (9) through an insulating connecting piece, magnets I (102) are symmetrically and fixedly installed on the fixed frame (101), springs II (103) are uniformly distributed and fixedly installed on the magnets I (102), a movable plate (104) is fixedly connected to the top end of the springs II (103), the right end of the movable plate (104) is movably connected with the top end of the fixed frame (101), and an included angle of 5-15 degrees is formed between the movable plate (104) and the horizontal plane;

contact contactor (12) are including protection casing (121), the right-hand member fixed mounting of left side plug-in strip (11) has fixed connecting rod (123), fixedly connected with contact connecting plate (122) on fixed connecting rod (123), contact connecting plate (122) are through fixed connecting rod (123) and left plug-in strip (11) fixed connection, fixed connecting rod (123) and protection casing (121) fixed connection, the right side fixed mounting who just is located fixed connecting rod (123) on protection casing (121) has magnet two (124).

4. A high voltage isolator as claimed in claim 1, wherein: the center pin (2) includes loose axle (21), loose axle (21) and fixed beam (1) activity cup joint, the bottom fixed mounting of loose axle (21) has drive gear (22), drive gear (22) and the left side rack toothing of two-sided rack (6).

5. A high voltage isolator as claimed in claim 1, wherein: the sliding device (4) comprises a sliding plate (41), a first rolling wheel (42) is movably mounted at one end, close to the central shaft (2), of the sliding plate (41), a lock catch (43) is fixedly mounted at the top of one end, close to the central shaft (2), of the sliding plate (41), the first rolling wheel (42) is movably connected with the outer wall of the arc-shaped rotating disc (3), and the lock catch (43) is movably connected with the inner wall of the arc-shaped rotating disc (3).

6. A high voltage disconnector according to claim 5, characterized in that: hasp (43) are including fixed square shaft (431), fixed square shaft (431) be square and with the last fixed surface of slide board (41) be connected, movable joint has drag link (432) on fixed square shaft (431), drag link (432) are close to the one end movable mounting of arc carousel (3) have two (434) wheels of rolling, wheel two (434) and arc carousel (3) swing joint roll, the inside fixedly connected with spring (433) of keeping away from one side of arc carousel (3) and being located drag link (432) of fixed square shaft (431).