CN107527765B - High-voltage isolating switch with ice-melting short circuit and conventional function switching and switching method thereof - Google Patents
High-voltage isolating switch with ice-melting short circuit and conventional function switching and switching method thereof Download PDFInfo
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- CN107527765B CN107527765B CN201710961223.8A CN201710961223A CN107527765B CN 107527765 B CN107527765 B CN 107527765B CN 201710961223 A CN201710961223 A CN 201710961223A CN 107527765 B CN107527765 B CN 107527765B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
- H01H31/02—Details
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/32—Driving mechanisms, i.e. for transmitting driving force to the contacts
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
- H01H31/02—Details
- H01H31/023—Base and stationary contacts mounted thereon
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
- H01H31/02—Details
- H01H31/026—Movable parts and contacts mounted thereon
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/32—Driving mechanisms, i.e. for transmitting driving force to the contacts
- H01H2003/326—Driving mechanisms, i.e. for transmitting driving force to the contacts using bearings
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Abstract
A high-voltage isolating switch with ice-melting short circuit and conventional function switching and a switching method thereof. The high-voltage isolating switch comprises a mounting bracket, wherein a short-circuit switch operating mechanism is arranged on the mounting bracket, a horizontal bracket is arranged at the top of the mounting bracket, a three-phase high-voltage isolating switch body is arranged above the horizontal bracket, and a three-phase short-circuit isolating switch body is arranged at one end of a rotary porcelain bottle of the three-phase high-voltage isolating switch body; the three-phase short-circuit isolating switch bodies comprise short-circuit moving contacts and short-circuit fixed contacts; the short-circuit moving contact of the three-phase short-circuit isolating switch body is respectively connected with corresponding rotating bearing seats through different rotating porcelain bottles, the rotating bearing seat arranged at the other end of the C-phase high-voltage isolating switch body is connected with a first vertical connecting rod through a first operating pull rod, and the first vertical connecting rod is connected with a short-circuit switch operating mechanism. The invention also comprises a switching method of the high-voltage isolating switch with the ice-melting short circuit and the conventional function switching. By using the invention, the short-circuit of ice melting and the rapid switching of the conventional functions (operation and grounding) can be realized.
Description
Technical Field
The invention mainly relates to the technical field of high-voltage switches, in particular to a high-voltage isolating switch with ice-melting short circuit and conventional function switching and a switching method thereof.
Background
Currently, in the typical design of southern power grid companies, there are no bypass buses in the 110kV and 220kV substations. When a dc ice melting device is added in these substations, two irrecoverable problems will be encountered: firstly, an ice melting bus at the output side of the direct-current ice melting device cannot be directly connected with the head end of an ice melting line; at the end of the ice melt line there is also no special short circuit device capable of passing the ice melt current. This directly results in a very inefficient operation of the whole ice melting process: approximately 44% of the time is spent on shorting the ends of the connections at the head end of the line. At present, the common method is to construct the ice melting bus on the wall, and the ice melting bus and the line are manually connected by a prefabricated wire, namely, when the line is in normal operation, the prefabricated wire is taken down to be stored, and when the ice melting operation is needed, the line and the line switch unit are stopped to be in a maintenance state, and then the prefabricated wire is manually connected. And secondly, the space for connecting the direct-current ice melting bus and the ice melting line is limited, and if connecting equipment is additionally arranged between the ice melting bus and the ice melting line, the field must be expanded to collect the land.
In the existing working mode, the operation is carried out manually (according to the actual field experience, the time for completing the short circuit of the transmission line of 110kV or less and removing the short circuit is generally about 0.5-1 hour), and the existing mode causes low ice melting working efficiency and high safety risk of field operation of maintainers.
Disclosure of Invention
The technical problem to be solved by the invention is to overcome the defects in the prior art and provide a high-voltage isolating switch with ice-melting short circuit and conventional function switching and a switching method thereof, wherein the high-voltage isolating switch can realize the quick switching of ice-melting short circuit and conventional functions (operation and grounding) and quickly complete the three-phase short circuit connection at the tail end of a power transmission line.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the high-voltage isolating switch with ice melting short circuit and conventional function switching comprises a horizontal support, a mounting support, a short-circuit switch operating mechanism, a three-phase high-voltage isolating switch body and a three-phase short-circuit isolating switch body, wherein the short-circuit switch operating mechanism is arranged on the mounting support; the three-phase short circuit isolating switch body comprises a three-phase short circuit moving contact and a three-phase short circuit static contact; the three-phase short-circuit moving contact comprises an A-phase short-circuit moving contact, a B-phase short-circuit moving contact and a C-phase short-circuit moving contact; the three-phase short-circuit static contact comprises an A-phase short-circuit static contact, a B-phase short-circuit static contact and a C-phase short-circuit static contact; the A-phase short-circuit moving contact is arranged at the upper end of a rotary porcelain insulator of the A-phase high-voltage isolating switch body, the B-phase short-circuit moving contact is arranged at the upper end of the rotary porcelain insulator of the B-phase high-voltage isolating switch body, and the C-phase short-circuit moving contact is arranged at the upper end of the rotary porcelain insulator of the C-phase high-voltage isolating switch body; the lower end of the rotary porcelain insulator of the A-phase high-voltage isolating switch body, the lower end of the rotary porcelain insulator of the B-phase high-voltage isolating switch body and the lower end of the rotary porcelain insulator of the C-phase high-voltage isolating switch body are respectively provided with a corresponding rotary bearing seat, the rotary bearing seats arranged at the lower ends of the rotary porcelain insulators of the C-phase high-voltage isolating switch body are connected with a first vertical connecting rod through a first operating pull rod, and the first vertical connecting rod is connected with a short-circuit switch operating mechanism.
And the wiring terminal on the A-phase short-circuit moving contact, the wiring terminal on the B-phase short-circuit moving contact and the wiring terminal on the C-phase short-circuit moving contact are connected through a short-circuit connecting bar.
The rotary bearing seat of the lower end of the rotary porcelain bottle of the A-phase high-voltage isolating switch body is provided with a first linkage connecting lever, the rotary bearing seat of the lower end of the rotary porcelain bottle of the B-phase high-voltage isolating switch body is provided with a second linkage connecting lever, the rotary bearing seats of the lower ends of the rotary porcelain bottles of the C-phase high-voltage isolating switch body are provided with third linkage connecting levers, the first linkage connecting levers are connected with the second linkage connecting levers through first horizontal connecting rods, and the second linkage connecting levers are connected with the third linkage connecting levers through second horizontal connecting rods. Linkage operation is realized between the three-phase short circuit isolating switch bodies through two horizontal connecting rods.
A mechanical locking device is arranged between a main knife of an existing high-voltage isolating switch and a main knife (namely, each phase short-circuit moving contact) of a three-phase short-circuit isolating switch body, and when the main knife of the high-voltage isolating switch is switched on, the short-circuit isolating switch cannot be switched on, so that the function of preventing misoperation is achieved.
Furthermore, a single-pole grounding switch operating mechanism is arranged on the mounting support, a mounting underframe is arranged on the horizontal support, a supporting frame is arranged on the mounting underframe, a grounding knife rotating shaft is arranged on the supporting frame, a grounding movable contact rod is arranged on the grounding knife rotating shaft, the grounding knife rotating shaft is connected with a second operating pull rod through a driven crank arm, the second operating pull rod is connected with a second vertical connecting rod through a driving crank arm, and the second vertical connecting rod is connected with the single-pole grounding switch operating mechanism. And a grounding static contact of the single-pole grounding switch is arranged on the short circuit connecting bar and is arranged between the B-phase high-voltage isolating switch body and the C-phase high-voltage isolating switch body.
The short-circuit switch operating mechanism is a conventional CS17 type manual operating mechanism or a CJ12 electric operating mechanism and is provided with a handle. The short-circuit switch operating mechanism is a power source for realizing the movement, the completion of the switching-on operation and the switching-off operation of the short-circuit moving contact.
The single-pole earthing switch operating mechanism is a conventional CS17 type manual operating mechanism, and is equipped with a handle.
Before use, three-phase high-voltage isolating switch bodies (namely an A-phase high-voltage isolating switch body, a B-phase high-voltage isolating switch body and a C-phase high-voltage isolating switch body) are arranged in front of an existing three-phase high-voltage isolating switch G, and three-phase short-circuit static contacts (namely an A-phase short-circuit static contact, a B-phase short-circuit static contact and a C-phase short-circuit static contact) are arranged on one side of a contact terminal base of the existing three-phase high-voltage isolating. The existing high-voltage isolating switch G can be a double-column horizontal rotation isolating switch and the like.
The switching method of the high-voltage isolating switch with the ice-melting short circuit and the conventional function switching comprises the following steps:
when the conventional function is switched to the ice-melting short-circuit function, a handle of the single-pole grounding switch operating mechanism is rotated 90 degrees anticlockwise, the single-pole grounding switch operating mechanism drives the second vertical connecting rod to rotate, the second vertical connecting rod drives the driving crank arm to rotate, the driving crank arm drives the second operating pull rod to move back and forth, the second operating pull rod drives the grounding knife rotating shaft to rotate through the driven crank arm, the grounding knife rotating shaft rotates to drive the grounding movable contact rod to rotate 90 degrees downwards, the grounding movable contact rod rotates downwards around the grounding knife rotating shaft, the grounding movable contact rod is separated from the grounding static contact, and the grounding movable contact rod is separated from a grounding static contact to complete the brake operation. Then the handle of the operating mechanism is rotated by 90 degrees clockwise, the operating torque drives a rotating bearing seat arranged at the lower end of a rotating porcelain bottle of the C-phase high-voltage isolating switch body to rotate through a first vertical connecting rod and a first operating pull rod, the rotating bearing seat arranged at the lower end of the rotating porcelain bottle of the C-phase high-voltage isolating switch body drives a rotating bearing seat arranged at the lower end of a rotating porcelain bottle of the B-phase high-voltage isolating switch body to rotate through a second horizontal connecting rod, the rotating bearing seat arranged at the lower end of the rotating porcelain bottle of the B-phase high-voltage isolating switch body drives the rotating bearing seat arranged at the lower end of the rotating porcelain bottle of the A-phase high-voltage isolating switch body to rotate along with the rotating bearing seat, and each rotating bearing seat drives a corresponding short-circuit moving contact to; when each phase of short-circuit moving contact horizontally rotates to 90 degrees, the end part of each phase of short-circuit moving contact is respectively contacted with the corresponding short-circuit fixed contact, and the switching-on operation of the three-phase short-circuit isolating switch is completed.
When the ice melting short circuit function is switched to the conventional function, a handle of the single-pole grounding switch operating mechanism is rotated by 90 degrees clockwise, the single-pole grounding switch operating mechanism drives the second vertical connecting rod to rotate, the second vertical connecting rod drives the driving crank arm to rotate, the driving crank arm drives the second operating pull rod to move back and forth, the second operating pull rod drives the grounding knife rotating shaft to rotate through the driven crank arm, the grounding knife rotating shaft rotates to drive the grounding movable contact rod to rotate 90 degrees upwards, the grounding movable contact rod rotates upwards around the grounding knife rotating shaft and is in contact with the grounding static contact, and the closing operation of the grounding movable contact rod is completed. Then, the handle of the operating mechanism is rotated 90 degrees anticlockwise, an operating torque drives a rotating bearing seat arranged at the lower end of a rotating porcelain bottle of the C-phase high-voltage isolating switch body to rotate through a first vertical connecting rod and a first operating pull rod, the rotating bearing seat arranged at the lower end of the rotating porcelain bottle of the C-phase high-voltage isolating switch body drives a rotating bearing seat arranged at the lower end of a rotating porcelain bottle of the B-phase high-voltage isolating switch body to rotate through a second horizontal connecting rod, the rotating bearing seat arranged at the lower end of the rotating porcelain bottle of the B-phase high-voltage isolating switch body drives the rotating bearing seat arranged at the lower end of the rotating porcelain bottle of the A-phase high-voltage isolating switch body to rotate along with the rotating bearing seat, and each rotating bearing seat drives a corresponding short-circuit moving contact to rotate; when each short-circuit moving contact horizontally rotates to 90 degrees, the end part of each short-circuit moving contact is separated from the corresponding short-circuit fixed contact, and the opening operation of the short-circuit isolating switch body is completed.
When the short-circuit moving contact rotates horizontally by 90 degrees, one end of the short-circuit moving contact connected with the rotary porcelain bottle is taken as a contact center point, and the other end of the short-circuit moving contact horizontally rotates around the contact center point to realize the contact and separation with the short-circuit fixed contact.
When the grounding movable contact rod rotates up and down by 90 degrees, one end of the grounding movable contact rod connected with the rotating shaft of the grounding knife is taken as a contact rod central point, and the other end of the grounding movable contact rod rotates up and down at the contact rod central point to realize the contact and separation with the grounding static contact.
Due to the adoption of the technical scheme, compared with the prior art, the invention improves the existing double-column horizontal rotation isolating switch and designs the structure of the high-voltage isolating switch with novel ice melting short circuit and conventional function switching. The grounding movable contact rod is contacted with the grounding fixed contact only by the single-pole grounding switch operating mechanism, and the normal operation can be realized according to the conventional mode of the original isolating switch. When a circuit needs to be short-circuited, the three-phase short-circuit connection of the power transmission line can be completed only by pulling the original double-column horizontal rotation isolating switch open, then pulling the grounding movable contact rod and the grounding static contact open and then enabling the short-circuit movable contact to be in contact with the short-circuit static contact, the operation can be completed in about 3-5 minutes, and the operation safety risk of maintainers is completely eliminated.
The existing high-voltage isolating switch with ice melting short circuit and conventional function switching adopts a vertical opening and closing structure, the vertical opening and closing structure is limited by the structure size, only a small supporting insulator can be adopted to support the through-current part of the short circuit grounding switch, the supporting insulator is stressed in the horizontal direction, and the short circuit grounding switch is heavy, the stress of bending moment is very large, the opening and closing operation force of the short circuit grounding switch is large, so that the problem of breakage of the small supporting insulator often occurs. And the existing short-circuit ice-melting isolating switch with the vertical opening and closing structure adopts a concentric matching structure of each phase shaft sleeve and a long shaft of a three-phase switch, the concentricity of each phase shaft sleeve hole is difficult to ensure when the three-phase short-circuit isolating switch is installed, the matching difficulty with the long shaft of the three-phase short circuit is high, and the friction force is high, so that the short-circuit ice-melting isolating switch with the vertical opening and closing structure has large operating torque and inflexible operation. In addition, the short-circuit ice melting isolating switch with the vertical open type structure cannot design the short-circuit conducting rod to be too large due to large operating force, the through-current capacity is relatively small, and the ice melting time is relatively long.
The opening and closing of the short-circuit isolating switch adopts a horizontal opening and closing structure, the rotary porcelain insulator is vertically installed, the conductive part, namely the short-circuit moving contact, is installed above the rotary porcelain insulator, the rotary porcelain insulator is stressed in the vertical direction, the short-circuit isolating switch is slightly influenced by the gravity of the conductive part, and the rotary porcelain insulator is mainly stressed in the self gravity direction and has strong bearing capacity, so that the short-circuit isolating switch has small operating moment, the short-circuit moving contact can be made into a large-current structure, namely the surface area of the short-circuit moving contact is larger than that of the conventional short-circuit moving contact (the surface area can be increased by 30-80%), the through-current capacity is strong (the current which can pass through the short-circuit. If the large current of 3150A can be conducted when the short-circuit isolating switch is used for deicing, the deicing time is shortened. The short-circuit ice-melting isolating switch has the advantages that the operation force required by the short-circuit ice-melting isolating switch is small through the flexibly-rotated bearing seat. The short-circuit isolating switch has the advantages that the required operating force is small, when the short-circuit ice-melting isolating switch is switched on and off, the influence of the gravity of the short-circuit moving contact 5 on the operating force is small, the operating moment required by the manual operating mechanism is small, and the switch can be switched on and off easily.
The invention has simple structure, economy, applicability, easy implementation and considerable use effect. The invention can realize the rapid switching of the ice-melting short circuit and the conventional functions (operation and grounding), rapidly complete the three-phase short circuit connection at the tail end of the power transmission line, not only improve the working efficiency and reduce the operation risk, but also does not need to change the appearance main structure and the basic installation size of the prototype isolating switch, has outstanding economic benefit, and can also realize the rapid switching of the ice-melting short circuit and the conventional functions (operation and grounding).
Drawings
FIG. 1 is a front view of a high voltage isolator with ice-melt short circuit and conventional function switching of the present invention;
FIG. 2 is a side view of the high voltage isolator shown in FIG. 1 with ice melt shorting and conventional function switching;
fig. 3 is a top view of the high-voltage isolation switch with ice-melting short circuit and conventional function switching shown in fig. 1.
FIG. 4 is a transmission diagram of a connecting rod of the ice-melting short-circuit isolating switch.
Detailed Description
The present invention will be described in further detail with reference to the following drawings and examples.
Referring to the attached drawings, the high-voltage isolating switch with ice melting short circuit and conventional function switching comprises a horizontal support 15, a mounting support 16, a short-circuit switch operating mechanism 17, a three-phase high-voltage isolating switch body 1 and a three-phase short-circuit isolating switch body 2, wherein the short-circuit switch operating mechanism 17 is arranged on the mounting support 16, the horizontal support 15 is arranged at the top of the mounting support 16, the three-phase high-voltage isolating switch body 1 is arranged above the horizontal support 15, and the three-phase high-voltage isolating switch body 1 comprises an A-phase high-voltage isolating switch body, a B-phase high-voltage isolating switch body and a C-phase; the three-phase short circuit isolating switch body 2 comprises a three-phase short circuit moving contact 5 and a three-phase short circuit static contact 4; the three-phase short-circuit moving contact 5 comprises an A-phase short-circuit moving contact, a B-phase short-circuit moving contact and a C-phase short-circuit moving contact; the three-phase short-circuit static contact 4 comprises an A-phase short-circuit static contact, a B-phase short-circuit static contact and a C-phase short-circuit static contact; the A-phase short-circuit moving contact is arranged at the upper end of a rotary porcelain insulator 20 of the A-phase high-voltage isolating switch body, the B-phase short-circuit moving contact is arranged at the upper end of the rotary porcelain insulator 20 of the B-phase high-voltage isolating switch body, and the C-phase short-circuit moving contact is arranged at the upper end of the rotary porcelain insulator 20 of the C-phase high-voltage isolating switch body; the lower end of a rotary porcelain insulator 20 of each phase high-voltage isolating switch body (namely, the A phase high-voltage isolating switch body, the B phase high-voltage isolating switch body and the C phase high-voltage isolating switch body) is provided with a corresponding rotary bearing seat 19, the rotary bearing seat arranged at the lower end of the rotary porcelain insulator of the C phase high-voltage isolating switch body is connected with a first vertical connecting rod 7 through a first operating pull rod 8, and the first vertical connecting rod 7 is connected with a short-circuit switch operating mechanism 17.
And the wiring terminal on the A-phase short-circuit moving contact, the wiring terminal on the B-phase short-circuit moving contact and the wiring terminal on the C-phase short-circuit moving contact are connected through a short-circuit connecting bar 3.
A first linkage connecting lever 21-1 is arranged on a rotating bearing seat at the lower end of a rotary porcelain bottle of the A-phase high-voltage isolating switch body, a second linkage connecting lever 21-2 is arranged on a rotating bearing seat at the lower end of a rotary porcelain bottle of the B-phase high-voltage isolating switch body, third linkage connecting levers 21-3 are arranged on rotating bearing seats at the lower end of rotary porcelain bottles of the C-phase high-voltage isolating switch body, the first linkage connecting lever 21-1 is connected with the second linkage connecting lever 21-2 through a first horizontal connecting rod 6-1, and the second linkage connecting lever 21-2 is connected with the third linkage connecting lever 21-3 through a second horizontal connecting rod 6-2. Linkage operation is realized between the three-phase short circuit isolating switch bodies 2 through a horizontal connecting rod.
Before use, a three-phase high-voltage isolating switch body 1 (namely, an A-phase high-voltage isolating switch body, a B-phase high-voltage isolating switch body and a C-phase high-voltage isolating switch body) is arranged in front of an existing three-phase high-voltage isolating switch G, and three-phase short-circuit static contacts 4 (namely, an A-phase short-circuit static contact, a B-phase short-circuit static contact and a C-phase short-circuit static contact) are arranged on one side of a contact wiring seat of the existing three-phase high. The existing high-voltage isolating switch G can be a double-column horizontal rotation isolating switch and the like.
During switching-on operation, a handle of the short-circuit switch operating mechanism 17 is forcibly operated to rotate 90 degrees clockwise, an operating torque drives a rotating bearing seat arranged at the lower end of a rotating porcelain bottle of a C-phase high-voltage isolating switch body to rotate through a first vertical connecting rod 7 and a first operating pull rod 8, the rotating bearing seat arranged at the lower end of the rotating porcelain bottle of the C-phase high-voltage isolating switch body drives a rotating bearing seat arranged at the lower end of a rotating porcelain bottle of a B-phase high-voltage isolating switch body to rotate through a second horizontal connecting rod 6-2, the rotating bearing seat arranged at the lower end of the rotating porcelain bottle of the B-phase high-voltage isolating switch body drives the rotating bearing seat arranged at the lower end of the rotating porcelain bottle of the A-phase high-voltage isolating switch body to rotate along with the rotating bearing seat through a first horizontal connecting rod 6-1, and each rotating bearing seat 19; when each phase of short-circuit moving contact 5 horizontally rotates to 90 degrees, the end part of each phase of short-circuit moving contact 5 is respectively contacted with the corresponding short-circuit fixed contact 4, and the switching-on operation of the three-phase short-circuit isolating switch 2 is completed.
During the opening operation, the handle of the short-circuit switch operating mechanism 17 is rotated by 90 degrees anticlockwise, and the action principle is the same as the closing process.
When the short-circuit moving contact 5 rotates horizontally, the short-circuit moving contact 5 takes one end connected with the rotating porcelain insulator 20 as a central point, and the other end of the short-circuit moving contact 5 rotates horizontally around the central point to realize the contact and separation with the short-circuit static contact 4, and the mode can be called horizontal opening and closing.
A mechanical locking device is arranged between a main knife of the existing high-voltage isolating switch 1 and a main knife (namely, each phase short circuit moving contact 5) of a three-phase short circuit isolating switch body 2, when the main knife of the high-voltage isolating switch 1 is switched on, the short circuit isolating switch 2 cannot be switched on, and the function of preventing misoperation is achieved.
The installation support 16 is provided with a single-pole grounding switch operating mechanism 18, the horizontal support 15 is provided with an installation underframe 10, the installation underframe 10 is provided with a support frame 23, the support frame 23 is provided with a grounding knife rotating shaft 11, the grounding knife rotating shaft 11 is provided with a grounding movable contact rod 12, the grounding knife rotating shaft 11 is connected with a second operation pull rod 14 through a driven crank arm 22, the second operation pull rod 14 is connected with a second vertical connecting rod 9 through a driving crank arm 24, and the second vertical connecting rod 9 is connected with the single-pole grounding switch operating mechanism 18. And a grounding static contact 13 of the single-pole grounding switch is arranged on the short circuit connecting bar 3, and the grounding static contact 13 is arranged between the B-phase high-voltage isolating switch body and the C-phase high-voltage isolating switch body.
When the single-pole grounding switch is in brake-separating operation, a handle of a single-pole grounding switch operating mechanism 18 is operated by rotating 90 degrees anticlockwise, the single-pole grounding switch operating mechanism 18 drives a second vertical connecting rod 9 to rotate, the second vertical connecting rod 9 drives a driving connecting lever 24 to rotate, the driving connecting lever 24 drives a second operating pull rod 14 to move back and forth, the second operating pull rod 14 drives a grounding knife rotating shaft 11 to rotate through a driven connecting lever 22, the grounding knife rotating shaft 11 rotates to drive a grounding movable contact rod 12 to rotate 90 degrees downwards, the grounding movable contact rod 12 rotates downwards around the grounding knife rotating shaft 11, the grounding movable contact rod 12 is separated from a grounding fixed contact 13, and brake-separating operation of the grounding movable contact rod 12 is completed. During closing operation, the handle of the operating mechanism 18 is rotated by 90 degrees clockwise, and the closing action principle is the same as that of opening.
The ice melting assembly is composed of a short circuit connecting bar 3, a short circuit static contact 4, a short circuit movable contact 5, a first horizontal connecting rod 6-1, a second horizontal connecting rod 6-2, a first vertical connecting rod 7, a first operating pull rod 8, a second vertical connecting rod 9, an installation underframe 10, a ground knife rotating shaft 11, a ground movable contact rod 12, a ground static contact 13, a second operating pull rod 14 and a single-pole ground switch operating mechanism 18. The short circuit connecting bar 3, the grounding movable contact rod 12 and the grounding static contact 13 jointly form an ice melting short circuit loop.
The short-circuit switch operating mechanism 17 may be a conventional CS17 type manual operating mechanism or a CJ12 electric operating mechanism, and is equipped with a handle. The short-circuit switch operating mechanism 17 is a power source for realizing the movement, the completion of the switching-on and the switching-off operations of the short-circuit movable contact 5.
The single pole earthing switch operating mechanism 18 may also be a conventional CS17 type manual operating mechanism, equipped with a handle.
The switching method of the high-voltage isolating switch with the ice-melting short circuit and the conventional function switching comprises the following steps:
when the normal function is switched to the ice-melting short-circuit function, the handle of the single-pole grounding switch operating mechanism 18 is rotated by 90 degrees anticlockwise, the single-pole grounding switch operating mechanism 18 drives the second vertical connecting rod 9 to rotate, the second vertical connecting rod 9 drives the driving connecting lever 24 to rotate, the driving connecting lever 24 drives the second operating pull rod 14 to move back and forth, the second operating pull rod 14 drives the grounding knife rotating shaft 11 to rotate through the driven connecting lever 22, the grounding knife rotating shaft 11 rotates to drive the grounding movable contact rod 12 to rotate downwards by 90 degrees, the grounding movable contact rod 12 rotates downwards around the grounding knife rotating shaft 11, the grounding movable contact rod 12 is separated from the grounding fixed contact 13, and the switching-off operation of the grounding movable contact rod 12 is completed. Then the handle of the operating mechanism 17 is rotated by 90 degrees clockwise, the operating torque drives the rotating bearing seat arranged at the lower end of the rotating porcelain bottle of the C-phase high-voltage isolating switch body to rotate through the first vertical connecting rod 7 and the first operating pull rod 8, the rotating bearing seat arranged at the lower end of the rotating porcelain bottle of the C-phase high-voltage isolating switch body drives the rotating bearing seat arranged at the lower end of the rotating porcelain bottle of the B-phase high-voltage isolating switch body to rotate through the second horizontal connecting rod 6-2, the rotating bearing seat arranged at the lower end of the rotating porcelain bottle of the B-phase high-voltage isolating switch body drives the rotating bearing seat arranged at the lower end of the rotating porcelain bottle of the A-phase high-voltage isolating switch body to rotate along with the rotating bearing seat through the first horizontal connecting rod 6-1, and each rotating bearing seat 19 drives the corresponding short-; when each phase of short-circuit moving contact 5 horizontally rotates to 90 degrees, the end part of each phase of short-circuit moving contact 5 is respectively contacted with the corresponding short-circuit fixed contact 4, and the switching-on operation of the three-phase short-circuit isolating switch 2 is completed.
When the ice melting short circuit function is switched to the conventional function, the handle of the single-pole grounding switch operating mechanism 18 is rotated by 90 degrees clockwise, the single-pole grounding switch operating mechanism 18 drives the second vertical connecting rod 9 to rotate, the second vertical connecting rod 9 drives the driving connecting lever 24 to rotate, the driving connecting lever 24 drives the second operating pull rod 14 to move back and forth, the second operating pull rod 14 drives the grounding knife rotating shaft 11 to rotate through the driven connecting lever 22, the rotation of the grounding knife rotating shaft 11 drives the grounding movable contact rod 12 to rotate upwards by 90 degrees, the grounding movable contact rod 12 rotates upwards around the grounding knife rotating shaft 11 and is in contact with the grounding fixed contact 13, and the closing operation of the grounding movable contact rod 12 is completed. Then, the handle of the short-circuit switch operating mechanism 17 is rotated counterclockwise by 90 degrees, the operating torque drives the rotating bearing seat arranged at the lower end of the rotating porcelain bottle of the C-phase high-voltage isolating switch body to rotate through the first vertical connecting rod 7 and the first operating pull rod 8, the rotating bearing seat arranged at the lower end of the rotating porcelain bottle of the C-phase high-voltage isolating switch body drives the rotating bearing seat arranged at the lower end of the rotating porcelain bottle of the B-phase high-voltage isolating switch body to rotate through the second horizontal connecting rod 6-2, the rotating bearing seat arranged at the lower end of the rotating porcelain bottle of the B-phase high-voltage isolating switch body drives the rotating bearing seat arranged at the lower end of the rotating porcelain bottle of the A-phase high-voltage isolating switch body to rotate along with the rotating bearing seat through the first horizontal connecting rod 6-1, and each rotating bearing seat 19 drives the corresponding short-; when each short-circuit moving contact 5 horizontally rotates to 90 degrees, the end part of each short-circuit moving contact 5 is separated from the corresponding short-circuit fixed contact 4, and the opening operation of the short-circuit isolating switch body 2 is completed.
When the short-circuit moving contact 5 rotates horizontally by 90 degrees, one end of the short-circuit moving contact 5 connected with the rotating porcelain bottle 20 is taken as a contact center point, and the other end of the short-circuit moving contact 5 rotates horizontally around the contact center point to realize the contact and separation with the short-circuit static contact 4, and the mode can be called as horizontal opening and closing.
When the grounding moving contact rod 12 rotates up and down by 90 degrees, one end of the grounding moving contact rod 12 connected with the grounding knife rotating shaft 11 is taken as a contact rod central point, and the other end of the grounding moving contact rod 12 rotates up and down at the contact rod central point to realize the contact and separation with the grounding static contact 13.
A preferred embodiment of the present invention has been described in detail. The detailed description is only intended to facilitate an understanding of the core concepts of the invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall into the protection scope of the claims of the present invention.
Claims (2)
1. The high-voltage isolating switch is characterized by comprising a horizontal support, a mounting support, a short-circuit switch operating mechanism, a three-phase high-voltage isolating switch body and a three-phase short-circuit isolating switch body, wherein the short-circuit switch operating mechanism is arranged on the mounting support; the three-phase short circuit isolating switch body comprises a three-phase short circuit moving contact and a three-phase short circuit static contact; the three-phase short-circuit moving contact comprises an A-phase short-circuit moving contact, a B-phase short-circuit moving contact and a C-phase short-circuit moving contact; the three-phase short-circuit static contact comprises an A-phase short-circuit static contact, a B-phase short-circuit static contact and a C-phase short-circuit static contact; the A-phase short-circuit moving contact is arranged at the upper end of a rotary porcelain insulator of the A-phase high-voltage isolating switch body, the B-phase short-circuit moving contact is arranged at the upper end of the rotary porcelain insulator of the B-phase high-voltage isolating switch body, and the C-phase short-circuit moving contact is arranged at the upper end of the rotary porcelain insulator of the C-phase high-voltage isolating switch body; the lower end of the rotary porcelain bottle of the A-phase high-voltage isolating switch body, the lower end of the rotary porcelain bottle of the B-phase high-voltage isolating switch body and the lower end of the rotary porcelain bottle of the C-phase high-voltage isolating switch body are respectively provided with a corresponding rotary bearing seat, the rotary bearing seats arranged at the lower ends of the rotary porcelain bottles of the C-phase high-voltage isolating switch body are connected with a first vertical connecting rod through a first operating pull rod, and the first vertical connecting rod is connected with a short-circuit switch operating mechanism;
the wiring terminal on the A-phase short-circuit moving contact, the wiring terminal on the B-phase short-circuit moving contact and the wiring terminal on the C-phase short-circuit moving contact are connected through a short-circuit connecting bar;
the installation support is provided with a single-pole grounding switch operating mechanism, the horizontal support is provided with an installation underframe, the installation underframe is provided with a support frame, the support frame is provided with a grounding knife rotating shaft, the grounding knife rotating shaft is provided with a grounding movable contact rod, the grounding knife rotating shaft is connected with a second operation pull rod through a driven crank arm, the second operation pull rod is connected with a second vertical connecting rod through a driving crank arm, and the second vertical connecting rod is connected with the single-pole grounding switch operating mechanism; a grounding static contact of the single-pole grounding switch is arranged on the short circuit connecting bar and is arranged between the B-phase high-voltage isolating switch body and the C-phase high-voltage isolating switch body;
the rotary bearing seat of the lower end of the rotary porcelain bottle of the A-phase high-voltage isolating switch body is provided with a first linkage connecting lever, the rotary bearing seat of the lower end of the rotary porcelain bottle of the B-phase high-voltage isolating switch body is provided with a second linkage connecting lever, the rotary bearing seats of the lower ends of the rotary porcelain bottles of the C-phase high-voltage isolating switch body are provided with third linkage connecting levers, the first linkage connecting levers are connected with the second linkage connecting levers through first horizontal connecting rods, and the second linkage connecting levers are connected with the third linkage connecting levers through second horizontal connecting rods.
2. The method for switching the high-voltage isolating switch with the ice-melting short circuit and the normal function switching as claimed in claim 1, characterized by comprising the following steps:
when the conventional function is switched to the ice-melting short-circuit function, a handle of a single-pole grounding switch operating mechanism is rotated 90 degrees anticlockwise, the single-pole grounding switch operating mechanism drives a second vertical connecting rod to rotate, the second vertical connecting rod drives a driving crank arm to rotate, the driving crank arm drives a second operating pull rod to move back and forth, the second operating pull rod drives a grounding knife rotating shaft to rotate through a driven crank arm, the grounding knife rotating shaft rotates to drive a grounding movable contact rod to rotate 90 degrees downwards, the grounding movable contact rod rotates downwards around the grounding knife rotating shaft, the grounding movable contact rod is separated from a grounding static contact, and the opening operation of the grounding movable contact rod is completed; then the handle of the operating mechanism is rotated by 90 degrees clockwise, the operating torque drives a rotating bearing seat arranged at the lower end of a rotating porcelain bottle of the C-phase high-voltage isolating switch body to rotate through a first vertical connecting rod and a first operating pull rod, the rotating bearing seat arranged at the lower end of the rotating porcelain bottle of the C-phase high-voltage isolating switch body drives a rotating bearing seat arranged at the lower end of a rotating porcelain bottle of the B-phase high-voltage isolating switch body to rotate through a second horizontal connecting rod, the rotating bearing seat arranged at the lower end of the rotating porcelain bottle of the B-phase high-voltage isolating switch body drives the rotating bearing seat arranged at the lower end of the rotating porcelain bottle of the A-phase high-voltage isolating switch body to rotate along with the rotating bearing seat, and each rotating bearing seat drives a corresponding short-circuit moving contact to; when each phase of short-circuit moving contact horizontally rotates to 90 degrees, the end part of each phase of short-circuit moving contact is respectively contacted with the corresponding short-circuit fixed contact, and the switching-on operation of the three-phase short-circuit isolating switch is completed;
when the ice melting short circuit function is switched to the conventional function, a handle of a single-pole grounding switch operating mechanism is rotated by 90 degrees clockwise, the single-pole grounding switch operating mechanism drives a second vertical connecting rod to rotate, the second vertical connecting rod drives a driving crank arm to rotate, the driving crank arm drives a second operating pull rod to move back and forth, the second operating pull rod drives a grounding knife rotating shaft to rotate through a driven crank arm, the grounding knife rotating shaft rotates to drive a grounding movable contact rod to rotate 90 degrees upwards, the grounding movable contact rod rotates upwards around the grounding knife rotating shaft and is in contact with a grounding static contact, and the closing operation of the grounding movable contact rod is completed; then, the handle of the operating mechanism is rotated 90 degrees anticlockwise, an operating torque drives a rotating bearing seat arranged at the lower end of a rotating porcelain bottle of the C-phase high-voltage isolating switch body to rotate through a first vertical connecting rod and a first operating pull rod, the rotating bearing seat arranged at the lower end of the rotating porcelain bottle of the C-phase high-voltage isolating switch body drives a rotating bearing seat arranged at the lower end of a rotating porcelain bottle of the B-phase high-voltage isolating switch body to rotate through a second horizontal connecting rod, the rotating bearing seat arranged at the lower end of the rotating porcelain bottle of the B-phase high-voltage isolating switch body drives the rotating bearing seat arranged at the lower end of the rotating porcelain bottle of the A-phase high-voltage isolating switch body to rotate along with the rotating bearing seat, and each rotating bearing seat drives a corresponding short-circuit moving contact to rotate; when each short-circuit moving contact horizontally rotates to 90 degrees, the end part of each short-circuit moving contact is separated from the corresponding short-circuit fixed contact, and the opening operation of the short-circuit isolating switch body is completed;
when the short-circuit moving contact horizontally rotates by 90 degrees, one end of the short-circuit moving contact connected with the rotating porcelain bottle is taken as a contact center point, and the other end of the short-circuit moving contact horizontally rotates around the contact center point to realize the contact and separation with the short-circuit fixed contact, and the mode can be called as horizontal opening and closing;
when the grounding movable contact rod rotates up and down by 90 degrees, one end of the grounding movable contact rod connected with the rotating shaft of the grounding knife is taken as a contact rod central point, and the other end of the grounding movable contact rod rotates up and down at the contact rod central point to realize the contact and separation with the grounding static contact.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710961223.8A CN107527765B (en) | 2017-10-17 | 2017-10-17 | High-voltage isolating switch with ice-melting short circuit and conventional function switching and switching method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710961223.8A CN107527765B (en) | 2017-10-17 | 2017-10-17 | High-voltage isolating switch with ice-melting short circuit and conventional function switching and switching method thereof |
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| CN107527765A CN107527765A (en) | 2017-12-29 |
| CN107527765B true CN107527765B (en) | 2020-04-07 |
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| CN201710961223.8A Active CN107527765B (en) | 2017-10-17 | 2017-10-17 | High-voltage isolating switch with ice-melting short circuit and conventional function switching and switching method thereof |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108336688B (en) * | 2018-04-23 | 2023-11-14 | 贵州电网有限责任公司 | Mobile direct-current ice melting horizontal access device |
| CN109004535B (en) * | 2018-06-22 | 2024-04-30 | 苏州达博思智能电网装备制造有限公司 | Isolation switch |
| CN109904030A (en) * | 2019-04-16 | 2019-06-18 | 中国电力工程顾问集团西南电力设计院有限公司 | Multifunction combined ice-melt disconnecting switch |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202473707U (en) * | 2012-03-26 | 2012-10-03 | 都匀供电局 | Isolation switch with ice-melting short circuit function |
| CN203325783U (en) * | 2013-04-15 | 2013-12-04 | 都匀供电局 | Isolation switch with ice-melting short circuit and grounding switching functions |
| CN207602457U (en) * | 2017-10-17 | 2018-07-10 | 湖南长高高压开关有限公司 | There is the high voltage isolator of ice-melt short circuit and conventional func switching |
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2017
- 2017-10-17 CN CN201710961223.8A patent/CN107527765B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202473707U (en) * | 2012-03-26 | 2012-10-03 | 都匀供电局 | Isolation switch with ice-melting short circuit function |
| CN203325783U (en) * | 2013-04-15 | 2013-12-04 | 都匀供电局 | Isolation switch with ice-melting short circuit and grounding switching functions |
| CN207602457U (en) * | 2017-10-17 | 2018-07-10 | 湖南长高高压开关有限公司 | There is the high voltage isolator of ice-melt short circuit and conventional func switching |
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