CN107171232B - Static contact device and method for live replacement of 10 kilovolt centrally installed switchgear high-voltage vacuum circuit breaker - Google Patents
Static contact device and method for live replacement of 10 kilovolt centrally installed switchgear high-voltage vacuum circuit breaker Download PDFInfo
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- CN107171232B CN107171232B CN201710449770.8A CN201710449770A CN107171232B CN 107171232 B CN107171232 B CN 107171232B CN 201710449770 A CN201710449770 A CN 201710449770A CN 107171232 B CN107171232 B CN 107171232B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B3/00—Apparatus specially adapted for the manufacture, assembly, or maintenance of boards or switchgear
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
- H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
- H02B13/035—Gas-insulated switchgear
- H02B13/0354—Gas-insulated switchgear comprising a vacuum switch
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- Power Engineering (AREA)
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- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
The invention relates to a device and a method for replacing an electrostatic head of a high-voltage vacuum circuit breaker of a centrally installed switchgear with 10 kilovolts in an electrified manner. Comprises an external clamping mechanism, an internal loading and unloading mechanism and an isolation baffle opening mechanism; the external clamping mechanism comprises a clamp, a clamp frame, a clamp head, an outer tube, a positioning sleeve and a fastening spring, the internal loading and unloading mechanism comprises an inner hexagonal wrench head, a rotary rod head, an inner tube and a steering mechanism, and the internal loading and unloading mechanism is arranged inside the external clamping mechanism. The isolation baffle opening mechanism comprises an expansion pin opening mechanism, a guide rail supporting mechanism, a connecting pipe and a locking rod, and the expansion pin opening mechanism is arranged in the middle of the inner side of the guide rail bracket through the connecting pipe. The invention is used for replacing the static contact in an electrified way, can avoid power failure treatment, is beneficial to improving the regional power supply reliability, reduces the labor intensity of operators and improves the production efficiency; the device has the advantages of small volume, light weight, convenient operation and strong practicability, fills the gap of live replacement of the static contact of the centrally installed switchgear of 10 kilovolts, and has popularization value in a power system.
Description
Technical Field
The invention relates to the field of electric auxiliary devices, in particular to an electrostatic head device and method for live replacement of a high-voltage vacuum circuit breaker of a 10-kilovolt centrally installed switchgear.
Background
The static contact of the high-voltage vacuum circuit breaker of the 10 KV centrally installed switchgear is extremely easy to generate heat in the use process, burning accidents frequently occur, and the static contact needs to be replaced when the defects occur. The isolation baffle is opened when the static contact is replaced, after the 10 kilovolt centrally installed switchgear of the transformer substation is pushed in by the switch trolley, the upper isolation baffle and the lower isolation baffle are opened, and the contact finger can be connected without barriers; when in an overhaul state, the switch trolley is pulled out, and the upper isolation baffle and the lower isolation baffle are automatically closed under the action of the springs, so that personnel are prevented from touching the electrified equipment by mistake. The main methods for opening the isolation baffle at the present stage are as follows: (1) temporarily removing the isolation barrier; (2) using an insulating lever to open the isolation barrier. In practical application, the two methods have the following defects: (1) The operation of temporarily removing the isolation baffle takes longer time, the operation of removing and installing a group of isolation baffles takes about 10 minutes, the working time for completing a 66 kilovolt transformer substation is longer, the working efficiency is low, and meanwhile, when the fixed contact is electrified, the operation of removing the isolation baffle violates the requirement of the safety distance when equipment of the national power grid company power safety working procedure (power transformation part) is not powered off, and the violation condition exists; (2) The insulating operation rod is very difficult to open the baffle, the tool is not suitable for causing difficult opening, even the opening state is difficult to fix and keep after the opening, and the applicability and the practicability are very poor. In addition, because the static contact is arranged on the bus, and is limited by the spatial structure of the centrally installed switchgear, equipotential operation cannot be performed, and power failure is required to be performed for such defect elimination operation. In actual work, the power failure operation time is long, the labor intensity of operators is high, the regional power supply reliability is reduced, and the power supply cost is greatly increased.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides a static contact device and a static contact method for live replacement of a high-voltage vacuum circuit breaker of a centrally installed switchgear of 10 kilovolts. When the fixed contact has the defects of heating, burning loss and the like, the invention adopts a ground potential mode to replace the fixed contact, thereby avoiding power failure operation, ensuring the safe running of live working, reducing the labor intensity of operators and improving the working efficiency.
In order to achieve the above purpose, the invention is realized by adopting the following technical scheme:
a static contact device for live replacement of a high-voltage vacuum circuit breaker of a 10-kilovolt centrally installed switchgear comprises an external clamping mechanism, an internal loading and unloading mechanism and an isolation baffle opening mechanism; the external clamping mechanism comprises a clamp, a clamp taking frame, a clamp head, an outer tube, a positioning sleeve and a fastening spring, wherein the clamp taking frame, the clamp head, the outer tube and the positioning sleeve are sequentially connected, the fastening spring is sleeved outside the clamp taking frame, the internal loading and unloading mechanism comprises an inner hexagonal wrench head, a rotary rod head, an inner tube and a steering mechanism, and the inner hexagonal wrench head, the rotary rod head, the inner tube and the steering mechanism are sequentially connected; the inner loading and unloading mechanism is arranged inside the outer clamping mechanism;
the isolation baffle opening mechanism comprises an expansion pin opening mechanism, a guide rail supporting mechanism, a connecting pipe and a locking rod; the guide rail supporting mechanism comprises a guide rail bracket, guide rail wheels and wheel support plates, the guide rail wheels are arranged on the wheel support plates, and the wheel support plates are fixedly connected to two sides of the guide rail bracket; the expansion pin opening mechanism is arranged in the middle of the inner side of the guide rail bracket through a connecting pipe, can be stored after rotating 180 degrees around the connecting pipe, and is arranged in the connecting pipe and the expansion pin box.
The inner diameter of the clamping clamp is matched with the outer diameter of the fixed contact, the clamping clamp is formed by combining multiple clamping petals, the circumferences of the clamping petals are uniformly distributed, a plurality of spring fixing grooves are formed in the outer parts of the clamping petals, a chamfer is formed in one end of the inner part of the clamping clamp, and a boss is arranged at the other end of the inner part of the clamping clamp; the outer part of the clamping frame is provided with a plurality of petal-shaped bulges which are matched with the clamping petals of the clamping frame; the clamping sleeve is fixed outside the clamping frame through a fastening spring, and the clamping petals and the petal-shaped bulges are combined into a cylinder.
The clamping rod head is of a stepped sleeve structure, a plurality of threaded holes are formed in the side face of the clamping rod head, and the inner diameter of one end of the clamping rod head is larger than or equal to the outer diameter of the outer tube; the outer tube and the inner tube are of a tube structure, and the inner diameter of the outer tube is larger than or equal to the outer diameter of the inner tube; the positioning sleeve is of a sleeve structure, and a threaded hole is formed in the side face of the positioning sleeve; the rotating rod head is of a stepped sleeve structure, the outer diameter of one end of the rotating rod head is matched with the inner diameter of the inner tube, the inner diameter of the other end of the rotating rod head is matched with the inner hexagonal spanner, and a threaded hole is formed in the side face of the other end of the rotating rod head.
The steering mechanism consists of a connecting sleeve, a steering plate and a handle, wherein one end of the steering plate is fixedly connected with the connecting sleeve, the other end of the steering plate is fixedly connected with the handle, an anti-skid friction sleeve is arranged outside the handle, and the inner diameter of the connecting sleeve is larger than or equal to the outer diameter of the inner tube.
The expansion pin box is of a box body structure, a sealing cover is arranged at the upper part of the expansion pin box, round holes and a connecting seat are arranged at two sides of the expansion pin box, and a round hole and a push-pull seat are arranged at the tail part of the expansion pin box; the handheld rod is arranged on the push-pull seat, one end of the connecting pipe is provided with a fixed seat and is arranged on the guide rail bracket through the fixed seat, and the other end of the connecting pipe is arranged on the side surface of the expansion pin box through the connecting seat; the connecting seat is provided with a turnover positioning hole, and the expansion pin opening mechanism is fixed through a fastening screw after rotating 180 degrees around the connecting pipe.
The expansion pin consists of a triangular pin and a push-pull rod, the triangular pin is of a triangular prism structure, a rectangular bulge is arranged at the top of the triangular pin, and a clamping groove is formed in the side face of the triangular pin; the triangular pin is arranged in the expansion pin box, the push-pull rod passes through the handheld rod, and the tail part of the push-pull rod extends out of the handheld rod; the push-pull rod is of a tubular structure and made of insulating materials, and an insulating handle is arranged at the tail of the push-pull rod.
The guide rail support consists of guide rail brackets and supporting beams, the guide rail is of a channel steel type structure with one end being a horn mouth, the two guide rail brackets are placed in parallel, and the supporting beams are connected with and support the two guide rail brackets.
The locking rod is provided with a pressure spring supporting seat, a pressure spring baffle is arranged in the connecting pipe, one end of the locking rod is connected with a pressure spring, the locking rod is kept in a state of pressing the expansion pin at any time, and the other end of the locking rod extends out of the connecting pipe.
The expansion pin box, the guide rail bracket and the connecting pipe are made of light metal materials; the handheld rod is of a tubular structure and is made of insulating materials.
A method for replacing a static contact of a high-voltage vacuum circuit breaker of a centrally installed switchgear with 10 kilovolts in an electrified manner specifically comprises the following steps:
(1) Preparation: the hand-held rod holding the isolation baffle opening mechanism horizontally rotates 180 degrees without power failure, the rotary positioning bolt is placed into the overturning positioning hole to be fixed, and the isolation baffle opening mechanism is adjusted from a storage state to a working state;
(2) Static contact isolation baffle is opened in electrified mode: the staff holds the handheld rod to push the guide rail wheel into the trolley guide rail of the switch cabinet, pushes the guide rail to the middle cabinet machine closing pulley, after the machine pulley is tightened, the upper isolation baffle and the lower isolation baffle are slowly opened, the push-pull rod is pushed in the direction of the expansion pin box, the locking rod extends out of two ends of the guide rail supporting mechanism and is clamped on cable boxes at two sides of the switch cabinet, and thus the opening operation of the upper isolation baffle and the lower isolation baffle is completed;
(3) Live dismantling static contact: holding the tail end of the external clamping mechanism, aligning the taking clamp with the fixed contact, pushing the fixed contact into the taking clamp by force, holding the outer tube by one hand of an operator, rotating and pushing the handle forward by the other hand, inserting the inner hexagonal plate head into the fixed contact fixing bolt in the process of rotating the pushing handle, and after the inner hexagonal plate head is inserted into the bolt, detaching the fixed contact fixing bolt by rotating the handle, detaching the fixed contact from the vacuum circuit breaker, and taking out the defective fixed contact together by pulling out the outer tube by hand;
(4) And (3) installing a static contact in a live mode: the installation sequence of the fixed contacts is opposite to the disassembly sequence, the new fixed contacts are placed in the taking clamp, the inner hexagonal plate heads are inserted into the fixed contact fixing bolts, the fixed contact fixing bolts are aligned with the fixed contact bolt holes of the vacuum circuit breaker, an operator holds the outer tube by one hand, rotates the handle by the other hand and pushes the handle forwards, and the fixed contacts are installed on the vacuum circuit breaker.
(5) Live-line closing static contact isolation baffle plate: after the static contact is installed, the push-pull rod is pulled outwards, the locking rod is retracted to be in an unlocking state, the handheld rod is held to pull the device outwards, the upper isolation baffle and the lower isolation baffle are closed, and the operation is completed.
Compared with the prior art, the invention has the beneficial effects that:
(1) The isolation baffle opening mechanism avoids the operation of dismounting the isolation baffle and opening the isolation baffle by the operating lever, reduces the labor intensity of operators, improves the working efficiency, minimizes the possibility of mistakenly closing the baffle due to improper fixation in the process of maintenance operation, and ensures the safety of the operation site;
(2) The isolation baffle opening mechanism disclosed by the invention is tightly attached to the bottom of the centrally installed switchgear when the isolation baffle is opened for working, so that the occupied space is small, and the operation space is not influenced;
(3) The isolation baffle opening mechanism has the advantages of light weight, convenient operation, strong practicability, smaller whole volume after folding, convenient carrying to different operation sites by workers and popularization and application values;
(4) The invention is used for replacing the static contact in an electrified way, can avoid power failure treatment, is beneficial to improving the regional power supply reliability, reduces the labor intensity of operators and improves the production efficiency;
(5) The invention has small volume, light weight, convenient operation and strong practicability, fills the gap of live replacement of the static contact of the centrally installed switchgear of 10 kilovolts, and has popularization and application values in the power system.
Drawings
FIG. 1 is a schematic perspective view showing a closed state of an opening mechanism of an isolation barrier after an inner pipe of an inner loading and unloading mechanism is pushed in;
FIG. 2 is a schematic view of the inner tube of the inner handling mechanism of the present invention showing a three-dimensional structure before pushing in;
FIG. 3 is a schematic perspective view of the internal loading and unloading mechanism of the present invention;
FIG. 4 is a schematic perspective view of an external clamping mechanism according to the present invention;
FIG. 5 is a schematic front view of the external clamping mechanism and internal loading and unloading mechanism structure of the present invention;
FIG. 6 is a schematic view of a clip according to the present invention;
FIG. 7 is a schematic perspective view of a clamping frame according to the present invention;
FIG. 8 is a perspective view of a clamping head of the present invention;
FIG. 9 is a perspective view of a rotary head according to the present invention;
fig. 10 is a schematic perspective view of the steering mechanism and the inner tube of the present invention.
FIG. 11 is a schematic perspective view showing a closing state of the opening mechanism of the isolation barrier of the present invention;
FIG. 12 is a schematic perspective view of an unlock state of an isolation barrier opening mechanism according to the present invention;
FIG. 13 is a perspective view showing the accommodating state of the opening mechanism of the isolation barrier of the present invention;
FIG. 14 is a schematic front view of the structure of the expanding pin opening mechanism of the present invention;
FIG. 15 is a schematic view showing the installation of the locking lever and the connecting pipe of the present invention.
In the figure: 1-an external clamping mechanism 2-an internal loading and unloading mechanism 3-a clamp 4-a clamp taking frame 5-a clamp head 6-an outer tube 7-a positioning sleeve 8-a fastening spring 9-an inner hexagonal wrench 10-a rotary head 11-an inner tube 12-a steering mechanism 13-a clamp flap 14-a spring fixing groove 15-a chamfer 16-a boss 17-a petal type bulge 18-a threaded hole 19-a connecting sleeve 20-a steering plate 21-a handle 22-an anti-slip friction sleeve 23-an expanding pin opening mechanism 24-a guide rail supporting mechanism 25-a connecting tube 26-a locking rod 27-an expanding pin box 28-a handheld rod 29-an expanding pin 30-a guide rail bracket 32-a wheel support plate 33-a sealing cover 34-a connecting seat 35-a push-pull seat 36-a turnover positioning hole 38-a triangular pin 39-a push-pull rod 40-a rectangular bulge 41-a clamping groove 42-an insulation handle 43-a guide slide rail 44-a support beam 45-a horn 46-a pressure spring supporting seat 47-a baffle 48-a cylindrical fixing seat 49-a pressure spring 50-a positioning bolt 51-an isolation opening mechanism
Detailed Description
The following is a further description of embodiments of the invention, taken in conjunction with the accompanying drawings:
as shown in fig. 1-2, the static contact device for the high-voltage vacuum circuit breaker of the mid-cabinet with 10 kilovolts of electricity to be replaced comprises an external clamping mechanism 1, an internal loading and unloading mechanism 2 and a separation baffle opening mechanism 51.
As shown in fig. 2-5, the external clamping mechanism 1 comprises a clamp 3, a clamp frame 4, a clamp rod head 5, an outer tube 6, a positioning sleeve 7 and a fastening spring 8. The outer tube 6 and the inner tube 11 are of a tube structure, and the inner diameter of the outer tube 6 is larger than or equal to the outer diameter of the inner tube 11.
As shown in fig. 6, the clamp 3 is formed by combining 4 clamp flaps 13, the circumferences of the 4 clamp flaps 13 are uniformly distributed, and the included angles between the two end faces of the clamp flaps 13 are 60 degrees. The outside of the clamp flap 13 is provided with 4 spring fixing grooves 14 which are matched with the fastening springs 8, one end of the inside of the clamp flap 13 is provided with a chamfer 15, and the other end is provided with a boss 16. The inner diameter of the clamp 3 is matched with the outer diameter of the static contact.
As shown in fig. 7, 4 petal-shaped bulges 17 matched with the clamp petals 13 of the clamp 3 are arranged outside the clamp taking frame 4, and the included angles between the two end surfaces of the petal-shaped bulges 17 are 30 degrees.
As shown in fig. 8, the clamping rod head 5 is of a stepped sleeve structure, the side surface of the clamping rod head is provided with 2M 6 threaded through holes 18, the inner diameter of one end of the clamping rod head is larger than or equal to the outer diameter of the outer tube 6, and the outer diameter of the other end of the clamping rod head is matched with the inner diameter of the clamping frame 4.
As shown in fig. 4-8, the clamp 3 is sleeved outside the clamp frame 4, the clamp flaps 13 and the petal-shaped bulges 17 are combined into a cylinder, and 4 fastening springs 8 are sleeved in 4 spring fixing grooves outside the clamp 3 to fasten the clamp 3 on the clamp frame 4. The clamping frame 4 is sleeved at one end of the clamping rod head 5 and is fixed by a screw; the other end of the clamping rod head 5 is sleeved outside the outer tube 6 and fixed by a screw.
As shown in fig. 3, the internal attachment/detachment mechanism 2 includes an internal hexagonal wrench 9, a rotary head 10, an inner tube 11, and a steering mechanism 12. The inner hexagonal spanner 9 is matched with the inner hexagonal bolt hole of the static contact.
As shown in fig. 9, the rotary club head 10 has a stepped sleeve structure, one end of which has an outer diameter equal to the inner diameter of the inner tube 11, and one end of the inner tube 11 is sleeved outside; the inner diameter of the other end of the rotary rod head 10 is matched with that of the inner hexagonal spanner 9, the hexagonal spanner 9 is inserted into the rotary rod head 10, an M6 threaded hole 18 is formed in the side face of the other end of the rotary rod head 10, and the hexagonal spanner 9 is fixed through screws.
As shown in fig. 10, the steering mechanism 12 is composed of a connecting sleeve 19, a steering plate 20 and a handle 21, wherein one end of the steering plate 20 is fixedly connected with the connecting sleeve 19, and the other end is fixedly connected with the handle 21. The inner diameter of the connecting sleeve 19 is equal to the outer diameter of the inner tube 11, and the connecting sleeve 19 is sleeved at the other end of the inner tube 11. The handle 21 is equipped with anti-skidding friction sleeve 22 outside, and anti-skidding friction sleeve 22 adopts insulating rubber material to make, and its surface is equipped with the non-skid protrusion, has increased the frictional force between handle and hand, prevents to skid.
As shown in fig. 3, one end of the inner tube 11 is fixedly connected with the steering mechanism 12 through a connecting sleeve 19, the other end of the inner tube is inserted into the rotary rod head 10 and fixedly connected with the rotary rod head 10, the inner diameter of the other end of the rotary rod head 10 is matched with the inner hexagonal wrench 9, and the inner hexagonal wrench 9 is fixed through an M6 screw after being inserted.
As shown in fig. 1-10, the inner attachment/detachment mechanism 2 is mounted inside the outer clamping mechanism 1, and the outer tube 6 of the outer clamping mechanism 1 is sleeved on the inner tube 11 of the inner attachment/detachment mechanism 2. Pushing and pulling the inner tube 11, and enabling the inner assembling and disassembling mechanism 2 to do reciprocating linear motion along the outer tube 6, pushing the inner tube 11 forwards, and enabling the inner hexagonal wrench 9 to extend out of the inner part of the picking clamp 3; the inner tube 11 is pulled back and the inner hexagonal wrench 9 is retracted inside the extraction clamp 3. The attaching/detaching mechanism 2 inside the rotary handle 21 rotates about the inner tube 11.
As shown in fig. 11 to 15, the barrier opening mechanism 51 includes an expansion pin opening mechanism 23, a rail supporting mechanism 24, a connection pipe 25, and a locking lever 26.
The expansion pin opening mechanism 23 comprises an expansion pin box 27, a handheld rod 28 and an expansion pin 29, wherein the expansion pin box 27 is made of an aluminum alloy material and is of a box body structure, a sealing cover 33 is arranged on the upper portion of the expansion pin box, round holes and a connecting seat 34 are formed in two sides of the expansion pin box, a round hole and a push-pull seat 35 are formed in the tail portion of the expansion pin box, and a turnover positioning hole 37 is formed in the connecting seat 34. The hand-held rod is of a 28 circular tube type structure, and the hand-held rod 28 is made of glass fiber reinforced plastic materials. The expansion pin 29 consists of a triangular pin 38 and a push-pull rod 39, the triangular pin 38 is of a triangular prism structure, a rectangular bulge 40 is arranged at the top of the triangular pin, a clamping groove 41 is arranged on the side face of the triangular pin, the push-pull rod 39 is of a circular tube type structure, the push-pull rod is made of glass fiber reinforced plastic materials, and an insulating handle 42 is arranged at the tail of the push-pull rod. The push-pull seat 35 is fixedly connected to the tail of the expansion pin box 27 through bolts, the pull seat 35 is provided with a cylindrical fixing seat 48, the cylindrical fixing seat 48 is provided with bolt holes, and the hand-held rod 28 is inserted into the cylindrical fixing seat 48 and is fixed through bolts. The triangular pin 38 of the expansion pin 29 is arranged in the expansion pin box 27, the push-pull rod 39 of the expansion pin 29 passes through the hand-held rod 28, and the tail part extends out of the hand-held rod 28.
The rail support mechanism 24 includes a rail bracket 30, 4 rail wheels 31, and 4 wheel brackets 32. The guide rail bracket 30 is an aluminum alloy frame structure formed by welding an introduction sliding rail 43 and a supporting beam 44, the introduction sliding rail 43 is a channel steel type structure with one end being a horn mouth 45, the two introduction sliding rails 43 are arranged in parallel, and the supporting beam 44 is welded between the two introduction sliding rails 43 to play a role of connecting and supporting. The wheel support plate 32 is of a strip shape, the guide rail wheel 31 is arranged at the bottom of the wheel support plate 32, and two parallel wheel support plates 32 are welded on the inner side of one guide rail 43.
The two sides of the expansion pin box 27 of the expansion pin opening mechanism 23 are provided with connecting seats 34, the two connecting pipes 25 are installed on the two sides of the expansion pin box 27 through inserting the connecting seats 34, the other ends of the two connecting pipes 25 are respectively provided with a fixing seat 36, and the other ends of the two connecting pipes 25 are fixedly connected to the inner sides of the guide-in sliding rails 43 through the fixing seats 36. The connecting seat 34 is provided with the turnover positioning hole 37, the expansion pin opening mechanism 23 can rotate around the connecting pipe 25 by 180 degrees, the expansion pin opening mechanism 23 rotates to the outer side of the guide rail supporting mechanism 24, the ground level is the working state, the expansion pin opening mechanism 23 rotates to the inner side of the guide rail supporting mechanism 24, the ground level is the storage state, the carrying is convenient, and the expansion pin opening mechanism 23 is fixed through the rotary positioning bolt 50 after rotating.
The locking rod 26 has a rod-shaped structure, the front end of which is conical, and the front part of which is provided with a pressure spring supporting seat 46. The connecting pipe 25 is internally provided with a pressure spring baffle 47, the locking rod 26 passes through the connecting pipe 25, the front end of the locking rod is positioned in the expansion pin box 27, the pressure spring 49 is fixed at the front part of the locking rod 26, the locking rod 26 is kept in a pressed state on the triangular pin 38 of the expansion pin 29 at any time, and the other end of the locking rod 26 extends out of the connecting pipe 25.
A method for replacing a static contact of a high-voltage vacuum circuit breaker of a centrally installed switchgear with 10 kilovolts in an electrified manner specifically comprises the following steps:
(1) Preparation: the hand-held rod 28 holding the isolation barrier opening mechanism 51 is horizontally rotated 180 degrees without power failure, and the rotary positioning bolt 50 is placed into the turning positioning hole 37 to be fixed, so that the isolation barrier opening mechanism 51 of the invention is adjusted from the storage state to the working state.
(2) Static contact isolation baffle is opened in electrified mode: the staff holds the handheld rod 28 to push the guide rail wheel 31 into the trolley guide rail of the switch cabinet, pushes the guide rail 43 to the middle cabinet machine closing pulley, after the machine pulley is tightened, the upper and lower isolation baffles are slowly opened, the push-pull rod 39 is pushed in the direction of the expansion pin box 27, and the locking rod 26 extends out from two ends of the guide rail supporting mechanism 24 and is clamped on cable boxes at two sides of the switch cabinet, so that the opening operation of the upper and lower isolation baffles is completed;
(3) Live dismantling static contact: the tail end of the external clamping mechanism 1 is used for aligning the taking clamp 3 with the fixed contact, pushing the fixed contact into the taking clamp 3 by force, holding the outer tube 6 by one hand of an operator, rotating and pushing the handle 21 forward by the other hand, inserting the inner hexagonal plate head 9 into the fixed contact fixing bolt in the process of rotating the pushing handle, and after the inner hexagonal plate head 9 is inserted into the bolt, detaching the fixed contact fixing bolt by the rotating handle, detaching the fixed contact from the vacuum circuit breaker, and taking out the defective fixed contact together by pulling out the outer tube 6 by hand;
(4) And (3) installing a static contact in a live mode: the installation sequence of the static contacts is opposite to the disassembly sequence, a new static contact is placed in the taking clamp 3, the inner hexagonal plate head 9 is inserted into the static contact fixing bolt, the static contact fixing bolt is aligned with the static contact bolt hole of the vacuum circuit breaker, an operator holds the outer tube 6 by one hand, rotates by the other hand and pushes the handle 21 forwards, and the static contact is installed on the vacuum circuit breaker.
(5) Live-line closing static contact isolation baffle plate: after the static contact is installed, the push-pull rod 39 is pulled outwards, the locking rod 26 is retracted to be in an unlocking state, the handheld rod 28 is held to pull the device outwards, the upper isolation baffle and the lower isolation baffle are closed, and the operation is completed.
The device avoids the operation of dismounting the isolation baffle and opening the isolation baffle by the operating lever, reduces the labor intensity of operators, improves the working efficiency, minimizes the possibility of mistakenly closing the baffle due to improper fixation in the process of maintenance operation, and ensures the safety of the operation site; when the device is started to work, the device is tightly attached to the bottom of the centrally installed switchgear, occupies small space and does not influence the operation space; the folding device is light in weight, convenient to operate, high in practicality, small in overall size after folding, convenient for workers to carry to different operation sites, and has popularization and application values.
The invention is used for replacing the static contact in an electrified way, can avoid power failure treatment, is beneficial to improving the regional power supply reliability, reduces the labor intensity of operators and improves the production efficiency; the invention has small volume, light weight, convenient operation and strong practicability, fills the gap of live replacement of the static contact of the centrally installed switchgear of 10 kilovolts, and has popularization and application values in the power system.
The above examples are implemented on the premise of the technical scheme of the present invention, and detailed implementation manners and specific operation processes are given, but the protection scope of the present invention is not limited to the above examples. The methods used in the above examples are conventional methods unless otherwise specified.
Claims (9)
1. The static contact method for live replacement of the high-voltage vacuum circuit breaker of the 10-kilovolt centrally installed switchgear is realized by adopting a static contact device for live replacement of the high-voltage vacuum circuit breaker of the 10-kilovolt centrally installed switchgear, and is characterized in that: the device comprises an external clamping mechanism, an internal loading and unloading mechanism and an isolation baffle opening mechanism; the external clamping mechanism comprises a clamp, a clamp taking frame, a clamp head, an outer tube, a positioning sleeve and a fastening spring, wherein the clamp taking frame, the clamp head, the outer tube and the positioning sleeve are sequentially connected, the fastening spring is sleeved outside the clamp taking frame, the internal loading and unloading mechanism comprises an inner hexagonal wrench head, a rotary rod head, an inner tube and a steering mechanism, and the inner hexagonal wrench head, the rotary rod head, the inner tube and the steering mechanism are sequentially connected; the inner loading and unloading mechanism is arranged inside the outer clamping mechanism;
the isolation baffle opening mechanism comprises an expansion pin opening mechanism, a guide rail supporting mechanism, a connecting pipe and a locking rod; the guide rail supporting mechanism comprises a guide rail bracket, guide rail wheels and wheel support plates, the guide rail wheels are arranged on the wheel support plates, and the wheel support plates are fixedly connected to two sides of the guide rail bracket; the expansion pin opening mechanism is arranged in the middle of the inner side of the guide rail bracket through a connecting pipe, can be stored after rotating 180 degrees around the connecting pipe, and the locking rod is arranged in the connecting pipe and the expansion pin box; the method for replacing the static contact of the high-voltage vacuum circuit breaker of the centrally installed switchgear with 10 kilovolts in an electrified manner specifically comprises the following steps:
(1) Preparation: the handheld rod holding the isolation baffle opening mechanism horizontally rotates 180 degrees without power failure, the rotary positioning bolt is placed into the overturning positioning hole to be fixed, and the isolation baffle opening mechanism is adjusted from a storage state to a working state;
(2) Static contact isolation baffle is opened in electrified mode: the staff holds the handheld rod to push the guide rail wheel into the trolley guide rail of the switch cabinet, pushes the guide rail to the middle cabinet machine closing pulley, after the machine pulley is tightened, the upper isolation baffle and the lower isolation baffle are slowly opened, the push-pull rod is pushed in the direction of the expansion pin box, the locking rod extends out of two ends of the guide rail supporting mechanism and is clamped on cable boxes at two sides of the switch cabinet, and thus the opening operation of the upper isolation baffle and the lower isolation baffle is completed;
(3) Live dismantling static contact: holding the tail end of the external clamping mechanism, aligning the taking clamp with the fixed contact, pushing the fixed contact into the taking clamp by force, holding the outer tube by one hand of an operator, rotating and pushing the handle forward by the other hand, inserting the inner hexagonal plate head into the fixed contact fixing bolt in the process of rotating the pushing handle, and after the inner hexagonal plate head is inserted into the bolt, detaching the fixed contact fixing bolt by rotating the handle, detaching the fixed contact from the vacuum circuit breaker, and taking out the defective fixed contact together by pulling out the outer tube by hand;
(4) And (3) installing a static contact in a live mode: the installation sequence of the fixed contacts is opposite to the disassembly sequence, a new fixed contact is placed in the taking clamp, the inner hexagonal plate head is inserted into the fixed contact fixing bolt, the fixed contact fixing bolt is aligned to the fixed contact bolt hole of the vacuum circuit breaker, an operator holds the outer tube by one hand, rotates the handle by the other hand and pushes the handle forwards, and the fixed contact is installed on the vacuum circuit breaker;
(5) Live-line closing static contact isolation baffle plate: after the static contact is installed, the push-pull rod is pulled outwards, the locking rod is retracted to be in an unlocking state, the handheld rod is held to pull the device outwards, the upper isolation baffle and the lower isolation baffle are closed, and the operation is completed.
2. The method for live replacement of the fixed contact of the high-voltage vacuum circuit breaker of the 10 kilovolt centrally installed switchgear, according to claim 1, is characterized in that: the inner diameter of the clamping clamp is matched with the outer diameter of the fixed contact, the clamping clamp is formed by combining multiple clamping petals, the circumferences of the clamping petals are uniformly distributed, a plurality of spring fixing grooves are formed in the outer parts of the clamping petals, a chamfer is formed in one end of the inner part of the clamping clamp, and a boss is arranged at the other end of the inner part of the clamping clamp; the outer part of the clamping frame is provided with a plurality of petal-shaped bulges which are matched with the clamping petals of the clamping frame; the clamping sleeve is fixed outside the clamping frame through a fastening spring, and the clamping petals and the petal-shaped bulges are combined into a cylinder.
3. The method for live replacement of the fixed contact of the high-voltage vacuum circuit breaker of the 10 kilovolt centrally installed switchgear, according to claim 1, is characterized in that: the clamping rod head is of a stepped sleeve structure, a plurality of threaded holes are formed in the side face of the clamping rod head, and the inner diameter of one end of the clamping rod head is larger than or equal to the outer diameter of the outer tube; the outer tube and the inner tube are of a tube structure, and the inner diameter of the outer tube is larger than or equal to the outer diameter of the inner tube; the positioning sleeve is of a sleeve structure, and a threaded hole is formed in the side face of the positioning sleeve; the rotating rod head is of a stepped sleeve structure, the outer diameter of one end of the rotating rod head is matched with the inner diameter of the inner tube, the inner diameter of the other end of the rotating rod head is matched with the inner hexagonal spanner, and a threaded hole is formed in the side face of the other end of the rotating rod head.
4. The method for live replacement of the fixed contact of the high-voltage vacuum circuit breaker of the 10 kilovolt centrally installed switchgear, according to claim 1, is characterized in that: the steering mechanism consists of a connecting sleeve, a steering plate and a handle, wherein one end of the steering plate is fixedly connected with the connecting sleeve, the other end of the steering plate is fixedly connected with the handle, an anti-skid friction sleeve is arranged outside the handle, and the inner diameter of the connecting sleeve is larger than or equal to the outer diameter of the inner tube.
5. The method for live replacement of the fixed contact of the high-voltage vacuum circuit breaker of the 10 kilovolt centrally installed switchgear, according to claim 1, is characterized in that: the expansion pin box is of a box body structure, a sealing cover is arranged at the upper part of the expansion pin box, round holes and a connecting seat are arranged at two sides of the expansion pin box, and a round hole and a push-pull seat are arranged at the tail part of the expansion pin box; the handheld rod is arranged on the push-pull seat, one end of the connecting pipe is provided with a fixed seat and is arranged on the guide rail bracket through the fixed seat, and the other end of the connecting pipe is arranged on the side surface of the expansion pin box through the connecting seat; the connecting seat is provided with a turnover positioning hole, and the expansion pin opening mechanism is fixed through a fastening screw after rotating 180 degrees around the connecting pipe.
6. The method for live replacement of the fixed contact of the high-voltage vacuum circuit breaker of the 10 kilovolt centrally installed switchgear, according to claim 1, is characterized in that: the expansion pin consists of a triangular pin and a push-pull rod, the triangular pin is of a triangular prism structure, a rectangular bulge is arranged at the top of the triangular pin, and a clamping groove is formed in the side face of the triangular pin; the triangular pin is arranged in the expansion pin box, the push-pull rod passes through the handheld rod, and the tail part of the push-pull rod extends out of the handheld rod; the push-pull rod is of a tubular structure and made of insulating materials, and an insulating handle is arranged at the tail of the push-pull rod.
7. The method for live replacement of the fixed contact of the high-voltage vacuum circuit breaker of the 10 kilovolt centrally installed switchgear, according to claim 1, is characterized in that: the guide rail support comprises an introduction slide rail and a support beam, wherein the introduction slide rail is of a channel steel type structure with one end being a horn mouth, the two introduction slide rails are arranged in parallel, and the support beam is connected with and supports the two introduction slide rails.
8. The method for live replacement of the fixed contact of the high-voltage vacuum circuit breaker of the 10 kilovolt centrally installed switchgear, according to claim 1, is characterized in that: the locking rod is provided with a pressure spring supporting seat, a pressure spring baffle is arranged in the connecting pipe, one end of the locking rod is connected with a pressure spring, the locking rod is kept in a state of pressing the expansion pin at any time, and the other end of the locking rod extends out of the connecting pipe.
9. The method for live replacement of the fixed contact of the high-voltage vacuum circuit breaker of the 10 kilovolt centrally installed switchgear, according to claim 1, is characterized in that: the expansion pin box, the guide rail bracket and the connecting pipe are made of light metal materials; the handheld rod is of a tubular structure and is made of insulating materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710449770.8A CN107171232B (en) | 2017-06-14 | 2017-06-14 | Static contact device and method for live replacement of 10 kilovolt centrally installed switchgear high-voltage vacuum circuit breaker |
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| CN201710449770.8A CN107171232B (en) | 2017-06-14 | 2017-06-14 | Static contact device and method for live replacement of 10 kilovolt centrally installed switchgear high-voltage vacuum circuit breaker |
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| CN107171232A CN107171232A (en) | 2017-09-15 |
| CN107171232B true CN107171232B (en) | 2023-08-15 |
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| CN107598572B (en) * | 2017-10-20 | 2023-09-26 | 江苏扬碟钻石工具有限公司 | Modularized precise cutting system |
| CN107834372A (en) * | 2017-11-27 | 2018-03-23 | 国家电网公司 | Armored high-tension switch cabinet valve opening device |
| CN107809083A (en) * | 2017-11-29 | 2018-03-16 | 国网山东省电力公司潍坊供电公司 | Fixed contact on handcart-type switch cabinet burnisher |
| CN109755891B (en) * | 2019-01-30 | 2024-02-02 | 上海西门子高压开关有限公司 | Bus assembly and gas-insulated metal-enclosed switchgear |
| CN116632703B (en) * | 2023-06-06 | 2024-03-29 | 国网山东省电力公司临清市供电公司 | Handcart-type switch contact replacement tool |
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