CN118039402B - A conductive contact rod structure for disconnector and working method thereof - Google Patents
A conductive contact rod structure for disconnector and working method thereof Download PDFInfo
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- CN118039402B CN118039402B CN202410263137.XA CN202410263137A CN118039402B CN 118039402 B CN118039402 B CN 118039402B CN 202410263137 A CN202410263137 A CN 202410263137A CN 118039402 B CN118039402 B CN 118039402B
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- 230000003068 static effect Effects 0.000 claims abstract description 34
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- 238000009423 ventilation Methods 0.000 claims description 12
- 238000007664 blowing Methods 0.000 claims description 6
- 230000005611 electricity Effects 0.000 claims description 3
- 238000001125 extrusion Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 17
- 238000012423 maintenance Methods 0.000 abstract description 9
- 230000002829 reductive effect Effects 0.000 description 10
- 238000009434 installation Methods 0.000 description 7
- 230000002035 prolonged effect Effects 0.000 description 7
- 239000007789 gas Substances 0.000 description 6
- 230000017525 heat dissipation Effects 0.000 description 6
- 238000002679 ablation Methods 0.000 description 5
- 238000007789 sealing Methods 0.000 description 4
- 230000002411 adverse Effects 0.000 description 3
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/02—Details
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/26—Drying gases or vapours
- B01D53/261—Drying gases or vapours by adsorption
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/50—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/58—Electric connections to or between contacts; Terminals
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/02—Details
- H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/02—Bases, casings, or covers
- H01H9/04—Dustproof, splashproof, drip-proof, waterproof, or flameproof casings
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/52—Cooling of switch parts
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Arc-Extinguishing Devices That Are Switches (AREA)
- Elimination Of Static Electricity (AREA)
Abstract
The invention discloses a conductive contact rod structure for an isolating switch and a working method thereof, wherein the conductive contact rod structure for the isolating switch is arranged at the top end of an upper support arm of a clamp isolating switch and comprises an inner support tube and a contact tube, the root of the inner support tube is fixedly connected at the top end of the upper support arm, and the contact tube is sleeved at the outer side of the inner support tube; the cross section outline of contact tube is equilateral polygon, each limit of equilateral polygon corresponds a side and is regarded as conductive outer wall, towards the static contact pole conductive outer wall contact when closing a floodgate the static contact pole. According to the invention, the contact tube with a plurality of conductive outer walls is used as an electric contact rod, and when in maintenance, the contact tube is rotated to replace a new conductive outer wall, so that the effect of replacing a new movable contact piece can be rapidly realized.
Description
Technical Field
The invention relates to the technical field of isolating switches, in particular to a conductive contact rod structure for an isolating switch and a working method thereof.
Background
The high-voltage isolating switch is used as one of important parts of a power transmission and transformation system, is primary equipment with the largest use amount in a power grid, and is in place when being switched on, so that good contact of contact fingers is ensured, and the air insulation distance which is clearly visible to naked eyes is ensured when the isolating switch is switched off, so that the safety of maintenance staff is ensured. The double-arm vertical telescopic high-voltage isolating switch is of a symmetrical scissor type structure, a vertical insulating fracture is formed after the switch is opened, the switch-on and switch-off state is clear, the switch-on and switch-off state is favorable for inspection, the double-arm vertical telescopic high-voltage isolating switch is used as a bus isolating switch in a power distribution device, the double-arm vertical telescopic high-voltage isolating switch has the advantage of small occupied area, and particularly in the wiring of a double-bus bypass, the land-saving effect is most remarkable. The movable contact jaw at the top end of the upper support arm of the double-arm vertical telescopic high-voltage isolating switch clamps the static contact rod, the length range of the contact rod of the jaw part is large, and the static contact rod is applicable to hard buses or soft buses.
However, the moving contact, namely the electric contact rod part of the existing clamp type isolating switch is often directly made of an aluminum rod or an alloy aluminum rod integrally formed with the upper support arm, and if arc ablation occurs, the moving contact is often required to be replaced integrally, so that the operation cost is high. In addition, some of the jaw type isolating switches are arc striking devices for single-column double-arm vertical telescopic isolating switches, for example, the patent publication No. CN113611567A, and the moving contact can be replaced to avoid replacing the whole conducting rod or isolating switch after arc ablation occurs on the moving contact in a mode that the moving contact is detachably mounted on the side surface of the conducting rod, which is close to the static contact rod. The method plays a role in reducing the running cost to a certain extent. However, such a single replacement of the movable contact is also required to be made of spare parts, which increases the stock of spare parts, makes the replacement process difficult, and makes the maintenance work labor intensive.
In order to overcome the above problems, a conductive contact bar structure for a disconnecting switch and a working method thereof are needed.
Disclosure of Invention
The invention aims to provide a conductive contact rod structure for an isolating switch and a working method thereof, wherein a contact tube with a plurality of conductive outer walls is used as an electrical contact rod, and a new movable contact piece effect can be quickly realized by rotating the contact tube to replace a new conductive outer wall during maintenance.
In order to solve the technical problems, the invention adopts the following technical scheme:
The invention discloses a conductive contact rod structure for a disconnecting switch, which is arranged at the top end of an upper support arm of a clamp type disconnecting switch and comprises an inner support pipe and a contact pipe, wherein the root of the inner support pipe is fixedly connected to the top end of the upper support arm, the contact pipe is sleeved on the outer side of the inner support pipe, the outer profile of the cross section of the contact pipe is an equilateral polygon, and each side of the equilateral polygon corresponds to one side surface to serve as a conductive outer wall, and contacts a static contact rod when the conductive outer wall facing the static contact rod is closed.
Further, the arc striking piece and the long bolt are further included, the outer profile of the cross section of the contact tube is square, through holes for the long bolt to pass through are formed in four sides of the top end of the contact tube, and the long bolt connects the contact tube with a plugboard at the bottom end of the arc striking piece on the inner supporting tube.
Further, a plug for sealing is arranged in the through hole, which is not connected with the long bolt, of the contact tube.
Further, the device also comprises a spring plate, wherein the cross section outline of the inner support tube is smaller than the outline of the inner wall of the contact tube, and a clearance cavity is reserved between the inner side surface of the inner support tube and the side wall of the contact tube, which faces the static contact rod; the elastic sheet capable of conducting electricity is longitudinally arranged in the clearance cavity in a through length mode and elastically supports the contact tube to contact the side wall of the static contact rod.
Furthermore, two clamping grooves are symmetrically and longitudinally formed in the side wall, facing the static contact rod, of the inner support tube, correspondingly, the number of the elastic sheets is two, the root parts of the elastic sheets are inserted into the clamping grooves through the pins, and the cantilever ends of the elastic sheets are abutted to the inner side wall, facing the static contact rod, of the contact tube.
Further, the clamping groove is a T-shaped groove or a dovetail groove, the cross section of the corresponding pin is a T-shaped head or a dovetail head, and the elastic sheet is of a V-shaped folded plate or an arc plate structure.
Further, the device also comprises a ventilation cooling mechanism, wherein the ventilation cooling mechanism performs blowing cooling on the clearance cavity.
Further, the ventilation cooling mechanism comprises an air source, an air inlet hole, an air inlet cavity, an air return cavity and an air exhaust hole, wherein the two elastic sheets divide the gap cavity into three independent cavities along the longitudinal direction, the middle cavity is the air inlet cavity, the cavities on two sides are the air return cavity, the top of each elastic sheet is provided with an air guide hole communicated with the air inlet cavity and the air return cavity, the top end of each upper support arm is provided with a connecting seat connected with the inner support tube, the air inlet hole and the air exhaust hole are formed in the top surface of the connecting seat, the air inlet hole is located on the bottom surface of the air inlet cavity, the air exhaust hole is located on the bottom surface of the air return cavity, and the air source provides clean and dry compressed air to the air inlet hole.
Further, the air source specifically adopts an air bag, a mounting plate of the air bag is fixedly connected below the connecting seat, two air bags are symmetrically mounted on the two upper support arms respectively, in the closing process of the isolating switch main body, the inward tail ends of the two air bags contact extrusion air blowing, an exhaust part and an air inlet pipe joint are arranged on the side wall of the connecting seat, the inner end of the exhaust part is communicated with the exhaust hole through a pipeline, the inner end of the air inlet pipe joint is communicated with the air inlet hole through a pipeline, and an air outlet and an air suction port are arranged on the air bag mounting plate and are communicated with the air inlet pipe joint through a pipeline.
The invention also discloses a working method of the conductive contact rod structure for the isolating switch, which comprises the steps of contacting the static contact rod by using the conductive contact rod structure for the isolating switch to complete conduction, and replacing contacts by converting the conductive outer wall of the contact tube.
Compared with the prior art, the invention has the beneficial technical effects that:
According to the conductive contact rod structure for the disconnecting switch, the cross section outline of the contact tube is an equilateral polygon, and each side of the equilateral polygon corresponds to one side surface to serve as the conductive outer wall, so that each contact tube is provided with a plurality of conductive outer walls, and when arc ablation and abrasion occur on one conductive outer wall serving as a working contact, the other side of the contact tube can be used as a new working contact surface by rotating the contact tube. The replacement period of the vulnerable part is prolonged, the service life of the equipment is prolonged, and the operation of rotating the contact tube is simple relative to the operation of disassembling and assembling the movable contact piece, so that the working strength is reduced. The conductive contact rod structure for the isolating switch adopts the contact tube with a plurality of conductive outer walls as the electrical contact rod, and the novel movable contact piece effect can be quickly realized by rotating the contact tube to replace the novel conductive outer wall during maintenance.
In addition, the contact tube is made of square tubes, so that the contact tube is convenient to manufacture and easy to obtain, and has a large contact conductive area of the conductive outer wall. By installing the arc striking piece at the top of the contact tube, the top openings of the contact tube and the inner support tube can be closed, and sundries such as rain, snow, sand and the like are prevented from entering the tube. Through every the via hole of stock bolt installation is all offered at electrically conductive outer wall top can realize the installation after rotating the contact tube, adds the stopper and can improve the sealing performance of inner chamber, avoids debris to get into. The elastic support of the elastic sheet is arranged on the side wall of the contact tube, which is contacted with the static contact rod, so that the contact impact of the contact tube can be buffered, and the deformation of the contact tube is avoided. By additionally arranging the clearance cavity as a heat dissipation space, the heat dissipation effect is improved. Through setting up two draw-in grooves and installing the shell fragment respectively, can carry out the support of two symmetry vertical logical long of contact conductive outer wall of contact tube, reduce the local heat altered shape that takes place, prevent the condition that takes place local sunken, improved electrically conductive efficiency. Through addding ventilation cooling mechanism is inside to the contact tube the clearance cavity is cooled by blowing, when the quick cooling contact tube, does not disturb the mixture with the external air, can not produce adverse effect to the electric arc, and the security is good. By skillfully and reasonably utilizing the elastic sheet as a partition plate of the air inlet cavity and the air return cavity, the clearance cavity is divided into cavity ventilation channels, and the high-speed skimming of dead-angle-free cooling air and the rapid cooling of the contact tube can be realized. The air bag is used as an air source of clean and dry compressed air, and the two upper support arms in the closing process are used for extruding the air bag to produce the clean and dry compressed air, so that the additional supply of power components such as an air pump and the like is avoided, the equipment cost is reduced, the air path is shortened, and the faults are reduced. Through set up the gas filtration subassembly on the induction port, can realize the dust removal and the drying to admitting air, improve the quality of cooling gas.
Drawings
The invention is further described with reference to the following description of the drawings.
Fig. 1 is a schematic diagram of a front view of a disconnecting switch with a conductive contact bar structure of the invention in embodiment 1;
FIG. 2 is a schematic cross-sectional view of the portion A of FIG. 1;
fig. 3 is a schematic front view of the conductive contact bar structure of embodiment 2;
FIG. 4 is a schematic cross-sectional view of the position B of FIG. 3;
fig. 5 is a schematic front view of the conductive contact bar structure of embodiment 3;
FIG. 6 is a schematic cross-sectional view of the position C of FIG. 5;
Fig. 7 is a partially enlarged schematic view of the airbag mounting portion in embodiment 3.
The reference numerals indicate that 1, a disconnecting switch main body, 2, an upper support arm, 201, a connecting seat, 2011, an exhaust part, 2012, an air inlet pipe joint, 3, an inner support pipe, 301, a clamping groove, 4, an arc striking part, 401, a plugboard, 5, a long bolt, 6, a contact pipe, 7, a plug, 8, a spring plate, 801, a pin, 802, an air guide hole, 9, an air inlet hole, 10, an air outlet hole, 11, an air inlet cavity, 12, an air return cavity, 13, an air bag, 1301, an air outlet, 1302, an air inlet, 14 and a static contact rod.
Detailed Description
The invention provides a conductive contact rod structure for an isolating switch and a working method thereof, wherein a contact tube with a plurality of conductive outer walls is used as an electrical contact rod, and a new movable contact piece effect can be quickly realized by rotating the contact tube to replace a new conductive outer wall during maintenance.
The following description of the embodiments of the present invention will be made in detail with reference to the accompanying drawings, wherein it is apparent that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present invention and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Referring to the drawings, fig. 1 is a schematic front view of a disconnecting switch with a conductive contact bar structure according to the present invention in embodiment 1, fig. 2 is a schematic front view of a portion a in fig. 1, fig. 3 is a schematic front view of a conductive contact bar structure according to the present invention in embodiment 2, fig. 4 is a schematic front view of a portion B in fig. 3, fig. 5 is a schematic front view of a conductive contact bar structure according to the present invention in embodiment 3, fig. 6 is a schematic front view of a portion C in fig. 2, and fig. 7 is a schematic partially enlarged structure of an air bag installation portion in embodiment 3.
Example 1
As shown in fig. 1 and 2, the two-arm vertical telescopic high-voltage isolating switch is taken as an example, and the top of the isolating switch main body 1 comprises two upper support arms 2 which can be symmetrically close to and far from each other. The conductive contact rod structure for the isolating switch is arranged at the top end of the upper support arm 2 of the clamp isolating switch and comprises an inner support tube 3 and a contact tube 6. The root of the inner support tube 3 is fixedly connected with the top end of the upper support arm 2, and the inner support tube 3 can be integrally formed with the upper support arm 2 or can be in a splicing or bolt connection mode. The contact tube 6 is sleeved on the outer side of the inner supporting tube 3, and the contact tube and the inner supporting tube are tightly sleeved, so that good mechanical connection strength and conductivity are ensured. The cross section outline of the contact tube 6 is an equilateral polygon, and each side of the equilateral polygon corresponds to a side surface as a conductive outer wall, and the conductive outer wall facing the static contact rod 14 contacts the static contact rod 14 when being closed. The outer contour of the cross section of the inner support tube 3 is consistent with the inner bore of the contact tube 6, and the contact tube 6 can be prevented from freely rotating in the circumferential direction.
Specifically, the upper support arm 2 and the inner support tube 3 are made of high-strength aluminum alloy materials, and the contact tube 6 is an aluminum alloy tube or a copper alloy tube and has good electric conductivity.
By taking the cross-sectional outer contour of the contact tube 6 as an equilateral polygon, each side of the equilateral polygon corresponds to a side surface as the conductive outer wall, so that each contact tube 6 is provided with a plurality of conductive outer walls, when arc ablation and abrasion occur by taking one conductive outer wall as a working contact, the other side can be used as a new working contact surface by rotating the contact tube 6. The replacement period of the vulnerable part is prolonged, the service life of the equipment is prolonged, the operation of rotating the contact tube 6 is simple relative to the operation of disassembling and assembling the movable contact piece, and the working strength is reduced. The conductive contact rod structure for the isolating switch adopts the contact tube with a plurality of conductive outer walls as the electrical contact rod, and the novel movable contact piece effect can be quickly realized by rotating the contact tube to replace the novel conductive outer wall during maintenance.
In a specific implementation manner of this embodiment, as shown in fig. 1 and fig. 2, the conductive contact rod structure for a disconnecting switch of the present invention further includes an arc striking member 4 and a long bolt 5, the outer profile of the cross section of the contact tube 6 is square, through holes through which the long bolt 5 passes are formed on four sides of the top end of the contact tube 6, and the long bolt 5 connects the contact tube 6 and the plug board 401 at the bottom end of the arc striking member 4 to the inner support tube 3. The long bolt 5 is locked by a locknut, so that falling caused by repeated opening and closing operations is avoided. The arc striking member 4 comprises two independent parts which are respectively arranged at the tops of the two inner supporting pipes 3, and can play a role in reducing the influence of electric arcs, which is consistent with the arc striking device in the prior art.
Specifically, as shown in fig. 1 and 2, a plug 7 for closing is attached to a via hole to which the long bolt 5 is not connected to the contact tube 6. The plug 7 can be pressed into the via hole of the contact tube 6 in a micro interference mode, and the plug is ejected out of the inner side of the contact tube 6 by using a screwdriver during disassembly and assembly. The plug 7 can be made of stainless steel or rubber with high temperature resistance and good weather resistance.
By adopting the square tube for the contact tube 6, the contact tube is convenient to manufacture, easy to obtain and has larger contact conductive area of the conductive outer wall. By installing the striking part 4 at the top of the contact tube 6, the top openings of the contact tube 6 and the inner support tube 3 can be closed, and sundries such as rain, snow, sand and the like are prevented from entering the tube. Through every the via hole of long bolt 5 installation is all offered at electrically conductive outer wall top, can realize the installation after rotating contact tube 6, add the sealing performance that stopper 7 can improve the inner chamber, avoid debris to get into.
In the process of replacing a new working contact point by using the conductive contact rod structure of the isolating switch, the isolating switch main body 1 is in an open state, and the contact tube 6 is far away from the static contact rod 14. The worker wears the protective tool, uses the spanner to detach the locknut of the long bolt 5, takes down the striking part 4, and pulls out the contact tube 6 from the inner support tube 3. The plug 7 is ejected from the inner side of the contact tube 6 by using a screwdriver, and the plug 7 is stored. The contact tube 6 is turned at a right angle so that the new conductive outer wall acts as a moving contact point towards the stationary contact rod 14. The plug board 401 is reinserted into the inner support tube 3 and the reinstalled long bolt 5 is locked using a locknut. The plug 7 is press-fitted into the via hole of the unused contact tube 6 again.
Example 2
On the basis of the embodiment 1, an elastic supporting mechanism of the contact tube 6 is added, and the conductive contact effect of the contact tube 6 is improved. As shown in fig. 3 and 4, the conductive contact rod structure for the isolating switch of the invention further comprises a spring plate 8, the cross section outline of the inner support tube 3 is smaller than the outline of the inner wall of the contact tube 6, and a clearance cavity is reserved between the inner side surface of the inner support tube 3 and the side wall of the contact tube 6 facing the static contact rod 14. The cross-sectional width of the inner support tube 3 is matched with the inner hole size of the contact tube 6 and can slide relatively. The elastic sheet 8 capable of conducting electricity is longitudinally arranged in the clearance cavity in a through length mode, and the elastic sheet 8 elastically supports the side wall of the contact static contact rod 14 of the contact tube 6. The spring plate 8 is made of copper alloy material with better elasticity.
The elastic sheet 8 is elastically supported on the side wall of the contact tube 6 contacting the static contact rod 14, so that contact impact of the contact tube 6 can be buffered, and deformation of the contact tube 6 is avoided. By additionally arranging the clearance cavity as a heat dissipation space, the heat dissipation effect is improved.
In a specific implementation manner of this embodiment, as shown in fig. 4, two clamping grooves 301 are symmetrically and longitudinally formed on the side wall of the inner support tube 3 facing the static contact rod 14, and correspondingly, the number of the elastic sheets 8 is two. The root of the spring plate 8 is inserted into the clamping groove 301 through the pin 801, and the cantilever end of the spring plate 8 is abutted against the inner side wall of the contact tube 6 facing the static contact rod 14.
Specifically, as shown in fig. 4, the card slot 301 is a T-shaped slot or a dovetail slot, and the corresponding pin 801 has a T-shaped head or a dovetail head in cross section. The spring plate 8 is of a V-shaped folded plate or arc plate structure.
Through setting up two draw-in grooves 301 and installing shell fragment 8 respectively, can carry out the support of two symmetry vertical logical long of contact conductive outer wall of contact tube 6, reduce the local heat altered shape that takes place, prevent the condition that takes place local sunken, improved electrically conductive efficiency.
Example 3
On the basis of the embodiment 2, the air cooling mechanism is added to improve the heating condition of the contact tube 6 in the process of contacting the static contact rod 14, and the contact tube 6 is cooled rapidly inside, so that the conductive effect of the contact tube is ensured. As shown in fig. 5 to 7, the ventilation cooling mechanism performs air-blowing cooling on the gap chamber.
By additionally arranging the ventilation cooling mechanism, the gap cavity is blown and cooled inside the contact tube 6, and the contact tube 6 is rapidly cooled and is not mixed with external air in a disturbance manner, so that adverse effects on electric arcs are avoided, and the safety is good.
In a specific implementation of this embodiment, as shown in fig. 5 and 6, the ventilation cooling mechanism includes a gas source, a gas inlet hole 9, a gas inlet cavity 11, a gas return cavity 12, and a gas outlet hole 10. The two spring plates 8 divide the gap chamber into three independent chambers along the longitudinal direction, the middle chamber is an air inlet chamber 11, the chambers on two sides are air return chambers 12, and the top of each spring plate 8 is provided with an air guide hole 802 which is communicated with the air inlet chamber 11 and the air return chambers 12. Specifically, the grooves of the elastic pieces 8 of the V-shaped folded plates face to the middle, so that the cross section area of the air inlet cavity 11 is approximately equal to the cross section areas of the two air return cavities 12. The top end of the upper support arm 2 is provided with a connecting seat 201 connected with the inner support tube 3, the air inlet hole 9 and the air outlet hole 10 are both arranged on the top surface of the connecting seat 201, the air inlet hole 9 is positioned on the bottom surface of the air inlet cavity 11, and the air outlet hole 10 is positioned on the bottom surface of the air return cavity 12. The air supply supplies clean dry compressed air to the inlet aperture 9.
By skillfully and reasonably utilizing the elastic sheet 8 as a partition plate of the air inlet cavity 11 and the air return cavity 12, the clearance cavity is divided into cavity ventilation channels, so that the dead-angle-free high-speed sweeping of cooling air can be realized, and the contact tube 6 can be rapidly cooled.
Specifically, the air source specifically adopts the air bags 13, the mounting plate of the air bags 13 is fixedly connected below the connecting seat 201, the two air bags 13 are respectively symmetrically arranged on the two upper support arms 2, and a reset spring is arranged inside the air bags 13. In the closing process of the isolating switch main body 1, the inward tail ends of the two air bags 13 are contacted and squeeze out compressed air. The side wall of the connecting seat 201 is provided with an exhaust part 2011 and an air inlet pipe connector 2012, wherein the inner end of the exhaust part 2011 is communicated with the exhaust hole 10 through a pipeline, and the inner end of the air inlet pipe connector 2012 is communicated with the air inlet hole 9 through a pipeline. The exhaust hole 10 is provided with a filter. An air outlet 1301 and an air suction port 1302 are arranged on the air bag 13 mounting plate, and the air outlet 1301 is communicated with an air inlet pipe joint 2012 through a pipeline.
Obviously, the air source can also adopt a separately-arranged air pump or an additional air cylinder, and the air cylinder is used for supplying dry compressed nitrogen or other inert gases, so that more excellent cooling and safe operation effects can be achieved. Similar simple variants fall within the scope of the invention.
Specifically, be provided with check valve and air filter subassembly on the induction port 1302, through the setting of check valve, the in-process of opening a floodgate, two gasbag 13 tail ends gradually separate, and gasbag 13 expand under the reset action of inside spring, and the check valve of induction port 1302 opens and accomplishes the inspiration, air filter subassembly includes filter disc and drier layer, can filter dust removal and dry the air that gets into.
The air bag 13 is used as an air source of clean and dry compressed air, and the two upper support arms 2 in the closing process are used for extruding the air bag 13 to generate the clean and dry compressed air, so that the additional supply of power components such as an air pump and the like is avoided, the equipment cost is reduced, the air path is shortened, and the faults are reduced. By providing the air filter assembly in the air inlet 1302, the intake air can be removed and dried, and the quality of the cooling air can be improved.
In the cooling process of the conductive contact rod structure for the isolating switch, in the closing process of the isolating switch main body 1, the two upper support arms 2 are driven to be close to each other, and in the process that the contact tube 6 gradually contacts the static contact rod 14, heating condition can occur. At the same time, the upper support arms 2 are close to each other, so that the tail parts of the two air bags 13 are contacted and pressed against each other, and clean and dry compressed air is produced. The clean dry compressed air enters the gap chamber through the air outlet 1301, the air inlet pipe joint 2012 and the air inlet hole 9 in sequence. Compressed air in the gap chamber flows and cools the inner side wall of the contact tube 6 in a turn-back mode along the middle air inlet cavity 11, the top air guide holes 802 and the air return cavities 12 at the two sides. Finally, the air is discharged through the exhaust hole 10 and the exhaust piece 2011, the whole process can not disturb the outside air in the conductive contact area, and the operation safety is good. In the opening process, the upper support arms 2 are separated from each other, the tail ends of the two air bags 13 are also gradually separated, the air bags 13 expand under the reset action of the internal springs, the one-way valve of the air suction port 1302 is opened to finish air suction, and the next cooling air blowing is prepared.
It should be noted that, the above embodiments and the drawings thereof are all described with respect to a dual-arm vertical telescopic high-voltage isolating switch, and in practice, the present invention is equally applicable to a single-arm telescopic isolating switch. The above embodiments and the drawings thereof should not be construed as limiting the invention as long as the isolating switch employing the clamp contact conduction falls within the scope of the present invention.
In summary, in the conductive contact rod structure for a disconnecting switch according to the present invention, the cross section outline of the contact tube 6 is an equilateral polygon, and each side of the equilateral polygon corresponds to one side surface as the conductive outer wall, so that each contact tube 6 has a plurality of conductive outer walls, and when arc ablation and wear occur on one conductive outer wall as a working contact, the other side surface can be used as a new working contact surface by rotating the contact tube 6. The replacement period of the vulnerable part is prolonged, the service life of the equipment is prolonged, the operation of rotating the contact tube 6 is simple relative to the operation of disassembling and assembling the movable contact piece, and the working strength is reduced. The conductive contact rod structure for the isolating switch adopts the contact tube with a plurality of conductive outer walls as the electrical contact rod, and the novel movable contact piece effect can be quickly realized by rotating the contact tube to replace the novel conductive outer wall during maintenance. In addition, the contact tube 6 is made of square tubes, so that the contact tube is convenient to manufacture and easy to obtain, and has a larger contact conductive area of the conductive outer wall. By installing the striking part 4 at the top of the contact tube 6, the top openings of the contact tube 6 and the inner support tube 3 can be closed, and sundries such as rain, snow, sand and the like are prevented from entering the tube. Through every the via hole of long bolt 5 installation is all offered at electrically conductive outer wall top, can realize the installation after rotating contact tube 6, add the sealing performance that stopper 7 can improve the inner chamber, avoid debris to get into. The elastic sheet 8 is elastically supported on the side wall of the contact tube 6 contacting the static contact rod 14, so that contact impact of the contact tube 6 can be buffered, and deformation of the contact tube 6 is avoided. By additionally arranging the clearance cavity as a heat dissipation space, the heat dissipation effect is improved. Through setting up two draw-in grooves 301 and installing shell fragment 8 respectively, can carry out the support of two symmetry vertical logical long of contact conductive outer wall of contact tube 6, reduce the local heat altered shape that takes place, prevent the condition that takes place local sunken, improved electrically conductive efficiency. By additionally arranging the ventilation cooling mechanism, the gap cavity is blown and cooled inside the contact tube 6, and the contact tube 6 is rapidly cooled and is not mixed with external air in a disturbance manner, so that adverse effects on electric arcs are avoided, and the safety is good. By skillfully and reasonably utilizing the elastic sheet 8 as a partition plate of the air inlet cavity 11 and the air return cavity 12, the clearance cavity is divided into cavity ventilation channels, so that the dead-angle-free high-speed sweeping of cooling air can be realized, and the contact tube 6 can be rapidly cooled. The air bag 13 is used as an air source of clean and dry compressed air, and the two upper support arms 2 in the closing process are used for extruding the air bag 13 to generate the clean and dry compressed air, so that the additional supply of power components such as an air pump and the like is avoided, the equipment cost is reduced, the air path is shortened, and the faults are reduced. By providing the air filter assembly in the air inlet 1302, the intake air can be removed and dried, and the quality of the cooling air can be improved.
The invention also discloses a working method of the conductive contact rod structure for the isolating switch, which is characterized in that the conductive contact rod structure for the isolating switch in any one of the embodiments contacts the static contact rod 14 to complete conduction, and contacts are replaced by switching the conductive outer wall of the contact tube 6.
By changing the movable contact contacting the static contact rod 14 by changing the conductive outer wall of the contact tube 6, the service efficiency of the contact tube 6 can be improved, the maintenance time can be reduced, and the service life of the isolating switch can be prolonged.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant points refer to the description of the method section.
The above embodiments are only illustrative of the preferred embodiments of the present invention and are not intended to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art to the technical solutions of the present invention should fall within the protection scope defined by the claims of the present invention without departing from the design spirit of the present invention.
Claims (9)
1. The conductive contact rod structure for the disconnecting switch is arranged at the top end of an upper support arm (2) of a jaw type disconnecting switch and is characterized by comprising an inner support tube (3) and a contact tube (6), wherein the root of the inner support tube (3) is fixedly connected to the top end of the upper support arm (2), the contact tube (6) is sleeved outside the inner support tube (3), the outer profile of the cross section of the contact tube (6) is an equilateral polygon, and each side of the equilateral polygon corresponds to one side surface to serve as a conductive outer wall, and contacts with a static contact rod (14) when the conductive outer wall facing the static contact rod (14) is closed;
The contact rod also comprises an elastic sheet (8), wherein the cross section outline of the inner support tube (3) is smaller than the inner wall outline of the contact tube (6), and a clearance cavity is reserved between the inner side surface of the inner support tube (3) and the side wall of the contact tube (6) facing the static contact rod (14); the elastic sheet (8) capable of conducting electricity is longitudinally arranged in the clearance cavity in a through length mode and elastically supports the side wall of the contact tube (6) in contact with the static contact rod (14).
2. The conductive contact rod structure for the disconnecting switch of claim 1 further comprises an arc striking piece (4) and a long bolt (5), wherein the cross section outline of the contact tube (6) is square, through holes for the long bolt (5) to pass through are formed in four sides of the top end of the contact tube (6), and the long bolt (5) connects the contact tube (6) and a plug board (401) at the bottom end of the arc striking piece (4) to the inner supporting tube (3).
3. The conductive contact bar structure for a disconnecting switch according to claim 2, wherein a plug (7) for closing is mounted in a via hole of the contact tube (6) to which the long bolt (5) is not connected.
4. The conductive contact rod structure for the disconnecting switch of claim 1 is characterized in that two clamping grooves (301) are symmetrically and longitudinally formed in the side wall, facing the static contact rod (14), of the inner support tube (3), corresponding to the two clamping grooves, of the elastic pieces (8), the root portions of the elastic pieces (8) are inserted into the clamping grooves (301) through pins (801), and cantilever ends of the elastic pieces (8) are abutted to the inner side wall, facing the static contact rod (14), of the contact tube (6).
5. The conductive contact bar structure for the disconnecting switch according to claim 4, wherein the clamping groove (301) is a T-shaped groove or a dovetail groove, the cross section of the corresponding pin (801) is a T-shaped head or a dovetail head, and the elastic sheet (8) is a V-shaped folded plate or an arc plate structure.
6. The electrically conductive contact bar structure for a disconnector of claim 4 or 5, further comprising an aeration-cooling mechanism that air-blow-cools said gap chamber.
7. The conducting contact rod structure for the isolating switch of claim 6, wherein the ventilation cooling mechanism comprises an air source, an air inlet hole (9), an air inlet cavity (11), an air return cavity (12) and an air outlet hole (10), the two elastic pieces (8) divide the gap cavity into three independent cavities along the longitudinal direction, the middle cavity is the air inlet cavity (11), the cavities on two sides are the air return cavity (12), the top of the elastic pieces (8) is provided with an air guide hole (802) communicated with the air inlet cavity (11) and the air return cavity (12), the top end of the upper support arm (2) is provided with a connecting seat (201) connected with the inner support tube (3), the air inlet hole (9) and the air outlet hole (10) are both arranged on the top surface of the connecting seat (201), the air inlet hole (9) is positioned on the bottom surface of the air inlet cavity (11), the air outlet hole (10) is positioned on the bottom surface of the air return cavity (12), and the air source provides clean and dry compressed air to the air inlet hole (9).
8. The conductive contact rod structure for the disconnecting switch of claim 7 is characterized in that the air source specifically adopts an air bag (13), a mounting plate of the air bag (13) is fixedly connected below the connecting seat (201), two air bags (13) are symmetrically mounted on the two upper support arms (2) respectively, in the closing process of the disconnecting switch main body (1), the inward tail ends of the two air bags (13) contact extrusion air blowing, an exhaust part (2011) and an air inlet pipe connector (2012) are arranged on the side wall of the connecting seat (201), the inner end of the exhaust part (2011) is communicated with the exhaust hole (10) through a pipeline, the inner end of the air inlet pipe connector (2012) is communicated with the air inlet hole (9) through a pipeline, an air outlet (1301) and an air suction port (1302) are arranged on the mounting plate of the air bag (13), and the air outlet (1301) is communicated with the air inlet pipe connector (2012) through a pipeline.
9. A working method of the conductive contact rod structure for the disconnecting switch is characterized in that the conductive contact rod structure for the disconnecting switch is used for contacting the static contact rod (14) to complete conduction, and contacts are replaced by converting the conductive outer wall of the contact tube (6).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202410263137.XA CN118039402B (en) | 2024-03-08 | 2024-03-08 | A conductive contact rod structure for disconnector and working method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202410263137.XA CN118039402B (en) | 2024-03-08 | 2024-03-08 | A conductive contact rod structure for disconnector and working method thereof |
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| CN118039402A CN118039402A (en) | 2024-05-14 |
| CN118039402B true CN118039402B (en) | 2025-02-11 |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4504708A (en) * | 1982-03-17 | 1985-03-12 | Ruhrtal-Elektrizitatsgesellschaft Hartig Gmbh & Co. | Disconnect switch |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1038151B (en) * | 1952-09-11 | 1958-09-04 | Siemens Ag | Single column scissor disconnector |
| FR1100853A (en) * | 1954-03-04 | 1955-09-26 | Comp Generale Electricite | Pantograph disconnect switch |
| DE2839914A1 (en) * | 1978-09-14 | 1980-03-27 | Bbc Brown Boveri & Cie | DISCONNECTOR WITH A MAIN AND Tear-off contact |
| CN201616373U (en) * | 2009-12-14 | 2010-10-27 | 山东泰开隔离开关有限公司 | Three-column horizontal tilting type outdoor three-phase high-voltage alternating-current isolating switch |
| CN102881506A (en) * | 2012-09-29 | 2013-01-16 | 山东泰开隔离开关有限公司 | Single-arm folding inserting type extra-high-voltage direct-current disconnecting switch |
| CN203103139U (en) * | 2013-01-15 | 2013-07-31 | 新东北电气集团隔离开关有限公司 | Seesaw-type moving contact structure |
| CN108604511B (en) * | 2016-02-26 | 2019-06-14 | Abb瑞士股份有限公司 | Disconnect switch with anti-icing device |
| JP6826497B2 (en) * | 2017-06-07 | 2021-02-03 | 株式会社東光高岳 | Vibration suppression device for pantograph type disconnector |
| CN214753510U (en) * | 2021-06-02 | 2021-11-16 | 抚顺高岳开关有限公司 | Single-arm vertical telescopic isolating switch with parallel four-bar structure |
| CN217847719U (en) * | 2022-08-12 | 2022-11-18 | 崔舜豪 | Power switch |
| CN115954228A (en) * | 2022-12-27 | 2023-04-11 | 长高电新科技股份公司 | Elastic pull rod device capable of adjusting clamping force of isolating switch and isolating switch |
-
2024
- 2024-03-08 CN CN202410263137.XA patent/CN118039402B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4504708A (en) * | 1982-03-17 | 1985-03-12 | Ruhrtal-Elektrizitatsgesellschaft Hartig Gmbh & Co. | Disconnect switch |
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| CN118039402A (en) | 2024-05-14 |
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