CN107171232B - Static contact device and method for live replacement of 10 kilovolt centrally installed switchgear high-voltage vacuum circuit breaker - Google Patents

Abstract

The invention relates to a device and method for live-replacing an electrostatic head of a high-voltage vacuum circuit breaker of a 10-kilovolt central cabinet. Including external clamping mechanism, internal loading and unloading mechanism, isolation baffle opening mechanism; external clamping mechanism includes clamping, clamping frame, clamping rod head, outer tube, positioning sleeve, fastening spring, internal loading and unloading mechanism includes hexagonal wrench , rotating rod head, inner tube, steering mechanism, and the internal loading and unloading mechanism are installed inside the external clamping mechanism. The opening mechanism of the isolation baffle includes an expansion pin opening mechanism, a guide rail support mechanism, a connecting pipe, and a locking rod. The invention is used for live replacement of static contacts, which can avoid power failure treatment, is beneficial to improve the reliability of regional power supply, reduce the labor intensity of operators, and improve production efficiency; it is small in size, light in weight, easy to operate, and strong in practicability, filling 10,000 The blank of the live replacement of the static contact of the volt central cabinet has promotional value in the power system.

Description

Device and method for live replacement of static contacts of high-voltage vacuum circuit breaker in 10 kV central cabinet

technical field

The invention relates to the field of electric power auxiliary devices, in particular to a device and method for live-replacing an electrostatic head of a high-voltage vacuum circuit breaker of a 10-kilovolt central cabinet.

Background technique

The static contacts of the 10 kV central cabinet high-voltage vacuum circuit breaker are prone to heat during use, and burnout accidents often occur. If such defects occur, the static contacts need to be replaced. The isolation baffle must be opened to replace the static contacts. After the switch trolley is pushed in the 10kV central cabinet of the substation, the upper and lower isolation baffles are opened, and the contacts and fingers can be connected without obstacles; , The switch trolley is pulled out, and the upper and lower isolation baffles are automatically closed under the action of the spring to prevent personnel from accidentally touching live equipment. There are two main methods for opening the isolation baffle at this stage: (1) temporarily remove the isolation baffle; (2) use the insulating operating lever to pick up the isolation baffle. In actual application, the above two methods all have the following disadvantages: (1) It takes a long time to temporarily remove the isolation baffle, and it takes about 10 minutes to remove and install a set of isolation baffles, and it takes time to complete the work of a 66 kV substation It is long and the work efficiency is low. At the same time, the removal of the isolation baffle when the static contact is charged violates the requirements of the safety distance when the equipment is not powered off in the "State Grid Corporation of Electricity Safety Work Regulations" (substation part), and there is a violation of regulations; (2) It is very difficult to open the baffle with the insulating operating rod, and it is difficult to open it due to inapplicable tools and utensils. In addition, because the static contacts are installed on the busbar and limited by the space structure of the central cabinet, it is impossible to carry out equipotential work. For this kind of shortcoming work, the power must be cut off. In actual work, the power outage operation takes a long time and the labor intensity of the operators is high, which reduces the reliability of the regional power supply and greatly increases the cost of power supply.

Contents of the invention

In order to overcome the shortcomings of the above-mentioned prior art, the present invention provides a live replacement device and method for a static contact of a 10 kV central cabinet high-voltage vacuum circuit breaker. When the static contact has defects such as heating and burning, the invention adopts the ground potential method to replace the static contact, avoiding power failure, ensuring the safety of live work, reducing the labor intensity of operators, and improving work efficiency.

In order to achieve the above object, the present invention adopts the following technical solutions to realize:

A live replacement device for static contacts of a high-voltage vacuum circuit breaker in a 10 kV central cabinet, comprising an external clamping mechanism, an internal loading and unloading mechanism, and an isolation baffle opening mechanism; Rod head, outer tube, positioning sleeve, fastening spring, clamping, clamping frame, clamping rod head, outer tube, positioning sleeve head and tail are connected in sequence, the fastening spring is set outside the clamping, and the internal loading and unloading mechanism includes an inner hexagon The wrench head, the rotating rod head, the inner tube, the steering mechanism, the hexagon socket head, the rotating rod head, the inner tube, and the steering mechanism are connected head to tail in sequence; the internal loading and unloading mechanism is installed inside the external clamping mechanism;

The opening mechanism of the isolation baffle includes an expansion pin opening mechanism, a guide rail support mechanism, a connecting pipe, and a locking rod; the expansion pin opening mechanism includes an expansion pin box, a hand-held rod and an expansion pin installed on the expansion pin box, and the guide rail The support mechanism includes a guide rail bracket, a guide rail wheel, and a wheel support plate. The guide rail wheel is installed on the wheel support plate, and the wheel support plate is fixed on both sides of the guide rail support; The opening mechanism of the expansion pin can be stored after rotating 180° around the connecting pipe, and the locking rod is installed inside the connecting pipe and the expansion pin box.

The inner diameter of the clamp is adapted to the outer diameter of the static contact. The clamp is composed of multiple petals, and the circumference of the clamp is evenly distributed. There are multiple spring fixing grooves on the outside, and a chamfer on one end of the inside. One end is provided with a boss; the outside of the clamping frame is provided with a plurality of petal-shaped protrusions adapted to the clamping petals; the clamping sleeve is fixed outside the clamping frame by fastening springs, and the clamping petals and petal-shaped Assemble into a cylinder.

The clamping rod head is a stepped sleeve structure, and its side is provided with a plurality of threaded holes, and the inner diameter of one end is greater than or equal to the outer diameter of the outer tube; the outer tube and the inner tube are tubular structures, and the inner diameter of the outer tube is greater than or equal to the inner tube The outer diameter; the positioning sleeve is a sleeve structure with threaded holes on its side; the rotating rod head is a stepped sleeve structure, the outer diameter of one end is adapted to the inner diameter of the inner tube, and the inner diameter of the other end is matched with the inner hexagon wrench Adaptive, the other end has a threaded hole on the side.

The steering mechanism is composed of a connecting sleeve, a steering plate, and a handle. One end of the steering plate is fixedly connected to the connecting sleeve, and the other end is fixedly connected to the handle. The handle is provided with a non-slip friction sleeve, and the inner diameter of the connecting sleeve is greater than or equal to the outer diameter of the inner pipe.

The expansion pin box is a box structure with a sealing cover on the upper part, round holes and connecting seats on both sides, and round holes and push-pull seats on the tail; the hand-held rod is installed on the push-pull seat, and one end of the connecting pipe is provided with a fixed seat, and is installed on the guide rail bracket through the fixed seat, and the other end is installed on the side of the expansion pin box through the connecting seat; the connecting seat is provided with a flip positioning hole, and the expansion pin opening mechanism rotates 180° around the connecting pipe and passes through the fastening screw fixed.

The expansion pin is composed of a triangular pin and a push-pull rod. The triangular pin is a triangular prism structure with a rectangular protrusion on the top and a locking slot on the side; The hand-held rod passes through, and the tail protrudes from the hand-held rod; the push-pull rod is a tubular structure made of insulating material, and its tail is provided with an insulating handle.

The guide rail bracket is composed of a guide rail and a support beam, the guide guide rail is a channel steel structure with a bell mouth at one end, two guide guide rails are placed in parallel, and the support beam connects and supports the two guide guide rails.

The locking lever is provided with a compression spring support seat, and the connecting pipe is provided with a compression spring baffle, and one end of the locking lever is connected with the compression spring to keep the locking lever in a compressed state to the expansion pin at all times, and the other end of the locking lever stretches out from the connecting tube.

The expansion pin box, guide rail bracket, and connecting pipe are made of light metal materials; the hand-held rod is made of tubular structure and made of insulating materials.

A method for replacing a static contact of a high-voltage vacuum circuit breaker of a 10-kilovolt central cabinet with electricity, specifically comprising the following steps:

(1) Preparatory work: without power failure, hold the hand-held lever of the opening mechanism of the isolation baffle and rotate it horizontally by 180 degrees, put the rotating positioning bolt into the flip positioning hole for fixing, and adjust the opening mechanism of the isolation baffle of the present invention from the storage state to working status;

(2) Open the static contact isolation baffle when it is live: the staff holds the hand-held lever and pushes the guide rail wheel into the guide rail of the switch cabinet trolley, pushes the guide rail to the mechanism pulley of the middle cabinet, and after the mechanism pulley is tightened, it goes up and down. The isolation baffle will open slowly, push the push-pull rod in the direction of the expansion pin box, and the locking rod will protrude from both ends of the guide rail support mechanism and be stuck on the cable boxes on both sides of the switch cabinet, thus completing the upper and lower isolation baffles The start of the job;

(3) Disassemble the static contact when it is live: hold the tail end of the external clamping mechanism, align the clamp with the static contact, push it in firmly, insert the static contact into the clamp, hold the outer tube with one hand, and hold the outer tube with the other. Rotate and push the handle forward with one hand, insert the hexagonal plate head into the fixed contact bolt during the process of rotating the push handle, when the hexagonal plate head is inserted into the bolt, rotate the handle to remove the fixed contact bolt, The static contact is removed from the vacuum circuit breaker, and the defective static contact can be taken out together by pulling out the outer tube with a hand;

(4) Installing the static contact with electricity: the installation sequence of the static contact is opposite to the disassembly sequence. Align the static contact bolt hole of the vacuum circuit breaker, the operator holds the outer tube with one hand, rotates and pushes the handle forward with the other hand, and the static contact is installed on the vacuum circuit breaker.

(5) Close the static contact isolation baffle with electricity: After the static contact is installed, pull the push-pull rod out, retract the locking rod, and it is in an unlocked state. Hold the handle rod and pull the device out to isolate the upper and lower The shutter closes and the job is all done.

Compared with prior art, the beneficial effect of the present invention is:

(1) The use of the isolation baffle opening mechanism of the present invention avoids the disassembly and assembly of the isolation baffle and the operation of opening the isolation baffle with the operating rod, reduces the labor intensity of the operators, improves work efficiency, and removes the baffle during the maintenance operation. The possibility of false closing due to improper fixing is minimized, ensuring the safety of the job site;

(2) When the opening mechanism of the isolation baffle of the present invention opens the isolation baffle, it is close to the bottom of the central cabinet when it is working, so it occupies a small space and does not affect the working space;

(3) The opening mechanism of the isolation baffle of the present invention is light in weight, easy to operate, strong in practicability, and the overall volume is small after folding, which is convenient for the staff to carry to different work sites, and has the value of popularization and application;

(4) The present invention is used for live replacement of static contacts, which can avoid power outage processing, is conducive to improving the reliability of regional power supply, reducing the labor intensity of operators, and improving production efficiency;

(5) The present invention is small in size, light in weight, easy to operate and strong in practicability, which fills the gap in the live replacement project of static contacts of 10 kV central cabinets, and has popularization and application value in power systems.

Description of drawings

Fig. 1 is a three-dimensional structural schematic diagram of the inner tube of the internal loading and unloading mechanism of the present invention after being pushed in and the locking state of the opening mechanism of the isolation baffle;

Fig. 2 is a schematic diagram of the three-dimensional structure before the inner tube of the internal loading and unloading mechanism of the present invention is pushed in;

Fig. 3 is a three-dimensional structural schematic diagram of the internal loading and unloading mechanism of the present invention;

Fig. 4 is a schematic diagram of the three-dimensional structure of the external clamping mechanism of the present invention;

Fig. 5 is a schematic front view of the structure of the external clamping mechanism and the internal loading and unloading mechanism of the present invention;

Fig. 6 is a schematic diagram of the three-dimensional structure of the present invention;

Fig. 7 is a schematic diagram of the three-dimensional structure of the clip-taking frame of the present invention;

Figure 8 is a schematic diagram of the three-dimensional structure of the clamping rod head of the present invention;

Fig. 9 is a schematic diagram of the three-dimensional structure of the rotating rod head of the present invention;

Fig. 10 is a schematic diagram of the three-dimensional structure of the steering mechanism and the inner tube of the present invention.

Fig. 11 is a three-dimensional structural schematic diagram of the locking state of the opening mechanism of the isolation baffle according to the present invention;

Fig. 12 is a schematic diagram of the three-dimensional structure of the opening mechanism of the isolation baffle in the unlocked state of the present invention;

Fig. 13 is a schematic diagram of the three-dimensional structure of the opening mechanism of the isolation baffle in the storage state of the present invention;

Fig. 14 is a schematic front view of the structure of the expansion pin opening mechanism of the present invention;

Fig. 15 is a schematic diagram of the installation of the locking rod and the connecting pipe of the present invention.

In the figure: 1-external clamping mechanism 2-internal loading and unloading mechanism 3-clamping 4-clamping frame 5-clamping rod head 6-outer tube 7-positioning sleeve 8-fastening spring 9-hexagonal wrench 10-rotation Rod head 11-inner tube 12-steering mechanism 13-clamp flap 14-spring fixing groove 15-chamfer 16-boss 17-petal-shaped protrusion 18-threaded hole 19-connecting sleeve 20-steering plate 21-handle 22- Anti-slip friction sleeve 23-expansion pin opening mechanism 24-rail support mechanism 25-connecting pipe 26-locking rod 27-expansion pin box 28-hand-held rod 29-expansion pin 30-rail bracket 31-rail wheel 32-wheel support plate 33- Sealing cover 34-Connecting seat 35-Push-pull seat 36-Fixed seat 37-Flip positioning hole 38-Triangle pin 39-Push-pull rod 40-Rectangular protrusion 41-Catch slot 42-Insulation handle 43-Introduction slide rail 44-Support beam 45-horn mouth 46-pressure spring support seat 47-pressure spring baffle 48-cylindrical fixed seat 49-pressure spring 50-locating bolt 51-isolation baffle opening mechanism

Detailed ways

The specific embodiment of the present invention will be further described below in conjunction with accompanying drawing:

As shown in Figure 1-2, a static contact device for live replacement of a 10 kV central cabinet high-voltage vacuum circuit breaker includes an external clamping mechanism 1, an internal loading and unloading mechanism 2, and an isolation baffle opening mechanism 51.

As shown in FIGS. 2-5 , the external clamping mechanism 1 includes a clamp 3 , a clamp frame 4 , a clamp 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 tubular structures, and the inner diameter of the outer tube 6 is greater than or equal to the outer diameter of the inner tube 11 .

As shown in FIG. 6 , the clamp 3 is composed of four clamping petals 13 , the four clamping petals 13 are evenly distributed on the circumference, and the angle between the two ends of the clamping petals 13 is 60°. Four spring fixing grooves 14 adapted to the fastening spring 8 are arranged on the outside of the clamp petal 13 , a chamfer 15 is provided at one end of the clamp petal 13 , and a boss 16 is provided at the other end. The inner diameter of the clamp 3 is adapted to the outer diameter of the static contact.

As shown in FIG. 7 , four petal-shaped protrusions 17 adapted to the clip petals 13 of the extractor 3 are arranged on the outside of the clamp frame 4 , and the angle between the two ends of the petal-shaped protrusions 17 is 30°.

As shown in Figure 8, the clamping rod head 5 is a stepped sleeve structure, and its side is provided with two M6 threaded through holes 18, the inner diameter of one end is greater than or equal to the outer diameter of the outer tube 6, and the outer diameter of the other end is the same as the inner diameter of the clamp frame 4. adaptation.

As shown in Figure 4-8, the clip 3 is set on the outside of the clip frame 4, the clip petal 13 and the petal-shaped protrusion 17 are combined to form a cylinder, and 8 fastening springs are set on the four springs outside the clip 3. In the groove, the clamp 3 is fastened on the clamp frame 4 . The clamp frame 4 is set on one end of the clamping rod head 5 and fixed by screws; the other end of the clamping rod head 5 is sleeved on the outside of the outer tube 6 and fixed by screws.

As shown in FIG. 3 , the internal loading and unloading mechanism 2 includes an inner hexagonal wrench 9 , a rotating rod head 10 , an inner tube 11 , and a steering mechanism 12 . The inner hexagonal wrench 9 is adapted to the inner hexagonal bolt hole of the static contact.

As shown in Figure 9, the rotating rod head 10 is a stepped sleeve structure, the outer diameter of one end is 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 rotating rod head 10 is adapted to the inner hexagon wrench 9 , the hexagonal wrench 9 is inserted into the rotating rod head 10, the other side of the rotating rod head 10 is provided with an M6 threaded hole 18, and the hexagonal wrench 9 is fixed by 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 . One end of the steering plate 20 is fixedly connected to the connecting sleeve 19 , and the other end is fixedly connected to the handle 21 . The inner diameter of the connecting sleeve 19 is equal to the outer diameter of the inner pipe 11 , and the connecting sleeve 19 is sleeved on the other end of the inner pipe 11 . The outside of the handle 21 is provided with an anti-slip friction sleeve 22, which is made of insulating rubber material, and its surface is provided with anti-slip protrusions, which increases the friction between the handle and the hand and prevents slipping.

As shown in Figure 3, one end of the inner tube 11 is affixed to the steering mechanism 12 through a connecting sleeve 19, and the other end is inserted into the rotating rod head 10 to be fixedly connected to the rotating rod head 10. Fitting, the hexagonal wrench 9 is inserted and fixed with M6 screws.

As shown in Figure 1-10, the internal loading and unloading mechanism 2 is installed inside the external clamping mechanism 1, and the outer tube 6 of the external clamping mechanism 1 is sleeved on the inner tube 11 of the internal loading and unloading mechanism 2. Push and pull the inner tube 11, the internal loading and unloading mechanism 2 makes a reciprocating linear motion along the outer tube 6, push the inner tube 11 forward, and the inner hexagonal wrench 9 protrudes from the inside of the clamp 3; pull the inner tube 11 backward, and the inner hexagonal wrench 9 retracts Take the inside of the clip 3. The internal loading and unloading mechanism 2 of the rotating handle 21 rotates with the inner tube 11 as the axis.

As shown in FIGS. 11-15 , the opening mechanism 51 of the isolation baffle includes an expansion pin opening mechanism 23 , a guide rail support mechanism 24 , a connecting pipe 25 , and a locking rod 26 .

Expansion pin opening mechanism 23 comprises expansion pin box 27, hand-held rod 28, expansion pin 29, and expansion pin box 27 adopts aluminum alloy material to make, and is box structure, and its top is provided with sealing cover 33, and both sides are provided with circular hole and connecting Seat 34, afterbody is provided with circular hole and push-pull seat 35, and connection seat 34 is provided with overturn positioning hole 37. Hand-held bar is 28 circular tube structures, and hand-held bar 28 adopts fiberglass material to make. Expansion pin 29 is made up of triangular pin 38 and push-pull rod 39 two parts, and triangular pin 38 is triangular prism structure, and its top is provided with rectangular protrusion 40, and side is provided with locking slot 41, and push-pull rod 39 is circular tubular structure, adopts Fiberglass material is made, and its afterbody is provided with insulating handle 42. The push-pull seat 35 is fixedly connected to the tail of the expansion pin box 27 by bolts, the drag seat 35 is provided with a cylindrical fixed seat 48, and the cylindrical fixed seat 48 is provided with a bolt hole, and the hand-held rod 28 is inserted in the cylindrical fixed seat 48. Fastened by bolts. The triangular pin 38 of expansion pin 29 is placed in the expansion pin box 27, and the push-pull bar 39 of expansion pin 29 passes in the handle bar 28, and afterbody stretches out from the handle bar 28.

The rail support mechanism 24 includes a rail bracket 30 , four rail wheels 31 , and four wheel support plates 32 . The guide rail bracket 30 is an aluminum alloy frame structure welded by the guide rail 43 and the support beam 44. The guide rail 43 is a channel steel structure with a bell mouth 45 at one end. The two guide rails 43 are placed in parallel, and the support beam 44 is welded. Between the two guide rails 43, it acts as a connecting support. The wheel support plate 32 is a strip type, and the guide rail wheel 31 is installed on the wheel support plate 32 bottoms, and two parallel wheel support plates 32 are welded on the inside of a lead-in slide rail 43 .

Both sides of the expansion pin box 27 of the expansion pin opening mechanism 23 are provided with connecting seats 34, and two connecting pipes 25 are installed on both sides of the expanding pin box 27 by inserting the connecting seats 34, and the other ends of the two connecting pipes 25 are respectively provided with fixing seats. 36, the other ends of the two connecting pipes 25 are fixedly connected to the inner side of the guide rail 43 through the fixing seat 36. The connecting seat 34 is provided with a flip positioning hole 37, the expansion pin opening mechanism 23 can rotate around the connecting pipe 25, 180°, the expansion pin opening mechanism 23 rotates to the outside of the guide rail support mechanism 24, and the working state is horizontal to the ground, and the expansion pin is opened Mechanism 23 rotates to the inner side of guide rail support mechanism 24, and it is a storage state with the ground level, which is easy to carry. After the expansion pin opening mechanism 23 rotates, it is fixed by rotating the positioning bolt 50.

The locking rod 26 is a rod-shaped structure, the front end is conical, and the front part is provided with a compression spring support seat 46 . A compression spring baffle 47 is provided in the connecting pipe 25, the locking rod 26 passes through the connecting pipe 25, the front end is located in the expansion pin box 27, and the compression spring 49 is fixed on the front part of the locking rod 26 to keep the locking rod 26 on the expansion pin at all times. The triangular pin 38 of 29 becomes compressed state, and the locking bar 26 other ends stretch out from connecting pipe 25.

A method for replacing a static contact of a high-voltage vacuum circuit breaker of a 10-kilovolt central cabinet with electricity, specifically comprising the following steps:

(1) Preparatory work: without power failure, hold the hand-held lever 28 of the isolation baffle opening mechanism 51 and turn it horizontally 180 degrees, put the rotating positioning bolt 50 into the flip positioning hole 37 for fixing, and install the isolation baffle opening mechanism 51 of the present invention. Adjust from storage state to working state.

(2) Open the static contact isolation baffle with electricity: the staff holds the hand-held lever 28 and pushes the guide rail wheel 31 into the guide rail of the switch cabinet trolley, pushes the guide rail 43 to the mechanism pulley of the central cabinet, and after the mechanism pulley is tightened, The upper and lower isolation baffles will be slowly opened, and the push-pull rod 39 will be pushed into the direction of the expansion pin box 27, and the locking rod 26 will stretch out from the two ends of the guide rail support mechanism 24 and be stuck on the cable box on both sides of the switch cabinet. Complete the opening operation of the upper and lower isolation baffles;

(3) Disassemble the static contact with power on: at the end of the external clamping mechanism 1, align the clamp 3 with the static contact, push it in firmly, insert the static contact into the clamp 3, and the operator holds the outer tube with one hand 6. The other hand rotates and pushes the handle 21 forward. During the process of rotating the push handle, insert the hexagonal plate head 9 into the static contact fixing bolt. After the hexagonal plate head 9 is inserted into the bolt, the rotating handle will make a static contact Remove the fixing bolts of the head, the static contacts are removed from the vacuum circuit breaker, and the defective static contacts can be taken out together by pulling out the outer tube 6 by hand;

(4) Installing static contacts with electricity: the installation sequence of the static contacts is opposite to the removal sequence. The fixing bolts are aligned with the static contact bolt holes of the vacuum circuit breaker. The operator holds the outer tube 6 with one hand, and rotates and pushes the handle 21 forward with the other hand, so that the static contact is installed on the vacuum circuit breaker.

(5) Closing the static contact isolation baffle with electricity: After the static contact is installed, pull the push-pull rod 39 outward, retract the locking rod 26, and it is in an unlocked state, hold the handle rod 28 and pull the device outward, , The lower isolation baffle is closed, and the work is all completed.

The use of this device avoids the disassembly and assembly of the isolation baffle and the operation of opening the isolation baffle with the operating lever, reduces the labor intensity of the operators, improves the work efficiency, and eliminates the possibility of the baffle being closed by mistake due to improper fixing during the maintenance operation. The safety is minimized, which ensures the safety of the job site; when the device is opened and works, it is close to the bottom of the central cabinet, which occupies a small space and does not affect the working space; the device is light in weight, easy to operate, and strong in practicability. Small in size, it is easy for the staff to carry it to different job sites, and it has the value of popularization and application.

The invention is used for live replacement of static contacts, which can avoid power failure processing, is beneficial to improve the reliability of regional power supply, reduce the labor intensity of operators, and improve production efficiency; the invention is small in size, light in weight, convenient in operation, strong in practicability, and fills It has opened up the blank of the live replacement project of the static contact of the 10 kV central cabinet, and has the value of popularization and application in the power system.

The above embodiments are implemented on the premise of the technical solutions of the present invention, and detailed implementation methods and specific operation processes are given, but the protection scope of the present invention is not limited to the above embodiments. The methods used in the above examples are conventional methods unless otherwise specified.

Claims (9)

1. A method for replacing the static contact of a high-voltage vacuum circuit breaker in a 10 kV central cabinet with power on, which is realized by using a device for replacing the static contact of a high-voltage vacuum circuit breaker in a 10 kV central cabinet with power on, characterized in that: the device includes an external clip Tightening mechanism, internal loading and unloading mechanism, isolation baffle opening mechanism; the external clamping mechanism includes clamping, clamping frame, clamping rod head, outer tube, positioning sleeve, fastening spring, clamping, clamping frame, clamping rod The head, the outer tube, and the positioning sleeve are connected head to tail in turn, and the fastening spring is set outside the clamp. The internal loading and unloading mechanism includes an inner hexagonal wrench, a rotating rod head, an inner tube, a steering mechanism, an inner hexagonal wrench, a rotating rod head, The inner tube and the steering mechanism are connected head to tail in sequence; the internal loading and unloading mechanism is installed inside the external clamping mechanism; The opening mechanism of the isolation baffle includes an expansion pin opening mechanism, a guide rail support mechanism, a connecting pipe, and a locking rod; the expansion pin opening mechanism includes an expansion pin box, a hand-held rod and an expansion pin installed on the expansion pin box, and the guide rail The support mechanism includes a guide rail bracket, a guide rail wheel, and a wheel support plate. The guide rail wheel is installed on the wheel support plate, and the wheel support plate is fixed on both sides of the guide rail support; The pin opening mechanism can be rotated 180° around the connecting pipe and then stored. The locking lever is installed inside the connecting pipe and the expansion pin box; the method of replacing the static contact of the high-voltage vacuum circuit breaker of the 10 kV central cabinet with electricity includes the following steps: (1) Preparatory work: without power failure, hold the hand-held lever of the opening mechanism of the isolation baffle and turn it horizontally 180 degrees, put the rotating positioning bolt into the flip positioning hole for fixing, and adjust the opening mechanism of the isolation baffle from the storage state to the working state; (2) Open the static contact isolation baffle when it is charged: the staff holds the hand-held lever and pushes the guide rail wheel into the guide rail of the switch cabinet trolley, pushes the guide rail to the mechanism pulley of the central cabinet, and after the mechanism pulley is tightened, it goes up and down. The isolation baffle will open slowly, push the push-pull rod in the direction of the expansion pin box, and the locking rod will protrude from both ends of the guide rail support mechanism and be stuck on the cable boxes on both sides of the switch cabinet, thus completing the upper and lower isolation baffles The start of the job; (3) Disassemble the static contact with power on: hold the tail end of the external clamping mechanism, align the clamp with the static contact, push it in firmly, and insert the static contact into the clamp. The operator holds the outer tube with one hand, and the other Rotate and push the handle forward with one hand, insert the hexagonal plate head into the fixed contact bolt during the process of rotating the push handle, when the hexagonal plate head is inserted into the bolt, rotate the handle to remove the fixed contact bolt, The static contact is removed from the vacuum circuit breaker, and the defective static contact can be taken out together by pulling out the outer tube with a hand; (4) Install the static contact with electricity: the installation sequence of the static contact is opposite to the disassembly sequence. Place the new static contact in the clamp, insert the hexagon socket head into the static contact fixing bolt, and put the static contact fixing bolt Align the static contact bolt hole of the vacuum circuit breaker, the operator holds the outer tube with one hand, rotates and pushes the handle forward with the other hand, and the static contact is installed on the vacuum circuit breaker; (5) Close the static contact isolation baffle when the static contact is installed: pull the push-pull rod out after the static contact is installed, retract the locking rod, and it is in an unlocked state, hold the hand-held rod and pull the device out to isolate the upper and lower The shutter closes and the job is all done. 2. According to claim 1, a method for replacing the static contact of a high-voltage vacuum circuit breaker in a 10 kV central cabinet with live charging, characterized in that: the inner diameter of the clamping is adapted to the outer diameter of the static contact, and the clamping is performed by multiple valves The clamping petals are combined, and the circumference of the clamping petals is evenly distributed. There are multiple spring fixing grooves on the outside, a chamfer on one end of the inside, and a boss on the other end; The petal-shaped protrusions that fit the clamp petals; the collet is fixed outside the clamp frame by a fastening spring, and the clamp petals and petal-shaped protrusions are combined to form a cylinder. 3. According to claim 1, a method for replacing the static contact of the high-voltage vacuum circuit breaker of the 10 kV central cabinet with electricity, characterized in that: the clamping rod head is a stepped sleeve structure, and its side is provided with a plurality of threaded holes , the inner diameter of one end is greater than or equal to the outer diameter of the outer tube; the outer tube and the inner tube are tubular structures, the inner diameter of the outer tube is greater than or equal to the outer diameter of the inner tube; the positioning sleeve is a sleeve structure, and a threaded hole is provided on its side; The rotating rod head is a stepped sleeve structure, the outer diameter of one end is adapted to the inner diameter of the inner pipe, the inner diameter of the other end is adapted to the inner hexagonal wrench, and a threaded hole is provided on the side of the other end. 4. A method for replacing the static contact of a 10 kV central cabinet high-voltage vacuum circuit breaker with electricity according to claim 1, characterized in that: the steering mechanism is composed of a connecting sleeve, a steering plate, and a handle, and one end of the steering plate is It is fixedly connected with the connecting sleeve, and the other end is fixedly connected with the handle. The handle is provided with a non-slip friction sleeve, and the inner diameter of the connecting sleeve is greater than or equal to the outer diameter of the inner pipe. 5. According to claim 1, a method for replacing the static contact of a 10 kV central cabinet high-voltage vacuum circuit breaker with electricity is characterized in that: the expansion pin box is a box structure, and the upper part is provided with a sealing cover. There is a round hole and a connecting seat, and a round hole and a push-pull seat are provided at the tail; the hand-held rod is installed on the push-pull seat, one end of the connecting pipe is provided with a fixing seat, and is installed on the guide rail bracket through the fixing seat, and the other end is installed on the rail bracket through the connecting seat. The side of the expansion pin box; the connecting seat is provided with a flip positioning hole, and the expansion pin opening mechanism is fixed by fastening screws after rotating 180° around the connecting pipe. 6. According to claim 1, a live replacement method for the static contact of a 10 kV central cabinet high-voltage vacuum circuit breaker is characterized in that: the expansion pin is composed of a triangular pin and a push-pull rod, and the triangular pin is Triangular prism structure, with a rectangular protrusion on the top and a locking slot on the side; the triangular pin is installed in the expansion pin box, the push-pull rod passes through the handle rod, and the tail protrudes from the handle rod; the push-pull rod is a tube Type structure, made of insulating material, with an insulating handle at the end. 7. According to claim 1, a method for replacing the static contact of a 10 kV central cabinet high-voltage vacuum circuit breaker with electricity, characterized in that: the guide rail bracket is composed of a guide rail and a support beam, and the guide rail is formed at one end. The channel steel structure of the bell mouth, two lead-in slide rails are placed in parallel, and the supporting beam connects and supports the two lead-in slide rails. 8. According to claim 1, a live replacement method for the static contact of the high-voltage vacuum circuit breaker of the 10 kV central cabinet is characterized in that: the locking rod is provided with a compression spring support seat, and the connecting pipe is provided with a compression spring retainer Plate, one end of the locking rod is connected to the compression spring, and the locking rod is kept in a compressed state on the expansion pin at all times, and the other end of the locking rod stretches out from the connecting pipe. 9. According to claim 1, a method of live-replacing the static contact of a high-voltage vacuum circuit breaker in a central cabinet of 10 kV is characterized in that: the expansion pin box, guide rail bracket, and connecting pipe are made of light metal materials; The hand-held rod is made of insulating material for a tubular structure.