CN105186338A - Construction method of employing insulation bucket arm vehicle insulating gloves with load to change pole top switch device - Google Patents

Abstract

The invention provides a construction method for replacing switchgear on a pole with loads of insulating gloves on an insulated bucket arm truck, comprising the following steps: construction preparation; electrical inspection and electrical measurement and insulation shielding; installation of bypass drain wires; circuit breaker out of operation and removal The original drain line; remove the switch; detect and hoist the new switch; lap the lead wires on both sides of the circuit breaker; put the new circuit breaker into operation and remove the bypass drain line; remove the insulation shielding; evacuate the tower. On the basis of ensuring safe operation and safe use of electricity, the present invention realizes the replacement switch of a 10KV line with load, and realizes the replacement of the isolation knife switch without stopping the power consumption of one user, which provides a great advantage for the field of online maintenance of electric power engineering The new working mode will bring huge economic benefits to both power supply and power consumption enterprises.

Description

Construction method of insulated bucket arm truck with insulated gloves to replace switchgear on pole with load

technical field

The invention relates to the field of electric power engineering.

Background technique

In the running 10KV line, the switch on the column (isolation knife switch) plays a role in controlling and protecting the line and load in the rear section of the switch. During operation, it is often encountered that some mechanical parts of the switch fail to operate, and some switches require In the case of increasing capacity, it is necessary to replace the switch (isolation switch) on the column. At present, the following methods are usually used for replacement: 1. Replacement after power failure: In this method, it is necessary to pull the switch on the upper level of the switch, causing some or even the entire line to be replaced. power failure. 2. Cut off all the loads on the line at the rear of the switch, then remove the upper lead of the switch with electricity, and then replace the switch. During the replacement, all users on the line at the back of the switch will not be able to use electricity. Since electricity has become an indispensable source of energy in daily life, partial or even full-line power outages will inevitably cause great inconvenience to users.

Contents of the invention

The technical problem to be solved by the present invention is to provide a construction method for replacing the switchgear on the pole with the insulated gloves of the insulated bucket arm truck under load, which can replace the switchgear without power interruption, and protect the interests of online users to the greatest extent .

The technical scheme that the present invention solves technical problem adopts is:

A construction method for replacing switchgear on a pole with loads of insulating gloves on an insulating bucket truck, the construction method includes the following steps:

1) Construction preparation: check the meteorological conditions, surrounding environment, line installation and safety measures, arrange the site, and place insulating bucket trucks and insulating tools;

2) Electrical inspection and electrical measurement and insulation shielding;

3) Operate the switch to lock it, and install bypass drainage lines on the incoming line side and outgoing line side of the switch respectively;

4) The circuit breaker is out of operation, and the original drainage wires on both sides of the switch are removed;

5) Remove the switch;

6) Detect and hoist the new switch;

7) Lap the lead wires on both sides of the circuit breaker on the live column;

8) The new circuit breaker is put into operation and the bypass drain line is removed;

9) Remove insulation shielding;

10) Evacuate the tower.

While adopting the above-mentioned technical solution, the present invention can also adopt or adopt the following further technical solutions in combination:

The construction preparation of step 1) includes:

1.1. Check the meteorological conditions, surrounding environment, wiring devices and safety measures;

1.2. Arranging the site: set up safety guardrails, operation signs and related warning signs at the work site;

1.3. Number the insulated bucket truck and the staff on it and place the insulated bucket truck. The insulated bucket truck reaches the working position and avoids nearby power lines and obstacles. Avoid parking on the ditch cover. The insulated bucket truck The order of outriggers is to first extend the horizontal outriggers, and then extend the vertical outriggers. After the support is in place, the front, rear, left, and right sides of the vehicle are horizontal, and the four wheels are off the ground. Overlap no more than 2 blocks and form an angle of 45° with each other. When the parking position is on a slope, the parking slope is ≯7°. When the front of the car is parked in the downhill direction, the front outriggers are supported first, and the rear outriggers are supported at the rear. The height difference between the front and rear of the vehicle after adjustment ≯3°, the buried depth of the temporary grounding body of the insulated bucket arm truck is ≮0.6m;

1.4. Inspect the insulating tools and appliances. Use an insulation resistance tester to test the surface insulation resistance of the insulating tools and appliances. The resistance value is not less than 700MΩ. The inspected insulating tools and appliances are placed on the moisture-proof mat.

Described step 2) specifically comprises the following steps:

2.1. Electricity inspection: No. 1 operator in each insulated bucket arm vehicle uses a high-voltage electroscope to conduct an electric inspection on the cross arm and top phase hoop to confirm that the insulator has no leakage current;

2.2. Electricity measurement: No. 1 operator in each insulated bucket arm car uses a clamp ammeter to measure the current of each phase's drain wire;

2.3. Set up insulation shielding: use insulating blankets and insulating hoses to insulate and shield the live parts and grounding bodies in the working channel that do not meet the working safety distance.

The order of removing the drain wires in step 4) is: first remove the inner phase, then remove the outer phase, and then remove the middle phase lead.

Described step 5) specifically comprises the following steps:

5.1, No. 2 operator of No. 1 insulated bucket arm truck operates the small crane, so that the hook is in an appropriate position above the switch;

5.2. Hang the hook on the rope cover of the human crane switch, and close the traction rope of the small crane, so that the traction rope is slightly stressed;

5.3. The No. 2 operator of the No. 2 insulated bucket arm truck removes the fixing screws of the switch and the switch house, or the counter-pin nut of the switch house and the cement pole fixing hoop;

5.4. Operator No. 2 of No. 1 insulated arm truck operates a small crane to hoist the switch to the ground.

The detection new switch in described step 6) comprises the following steps:

6.1. Open and close the new switch 2-3 times to confirm that the switch is flexible and the instructions are correct;

6.2. Use a 2500V insulation resistance meter to measure the insulation resistance between phases and phases to ensure that both are greater than 500 megohms.

Said step 6) in the hoisting new switch comprises the following steps:

6.3. Operator No. 2 of No. 1 insulated bucket arm truck operates the small crane and lifts the switch to the belt installation position;

6.4. The No. 2 operator of the No. 2 insulated bucket arm truck tightens the fixing screws of the switch and the switch house, or the counter-pin nuts of the switch bracket and the cement pole fixing hoop.

Described step 7) specifically comprises the following steps:

7.1. The ground operators install the drain wires on both sides of the circuit breaker on the new column, cover the insulation cover, and pull the circuit breaker;

7.2. The operators in the two insulated bucket arm vehicles respectively lap the lead wires on both sides of the circuit breaker on the column;

7.3. Close the circuit breaker on the column, and use the ammeter to confirm that the current has been shunted;

7.4. The operators in the two insulated arm trucks removed the lead wires on both sides of the circuit breaker on the pole respectively.

Described step 8) specifically comprises the following steps:

8.1. The No. 1 operator in the No. 1 insulating arm car operates the switch to make it in the closing position;

8.2. Use a clamp ammeter to measure whether the current of each phase of the switch is normal, so as to confirm the normal operation of the switch;

8.3. After confirming that it is correct, remove the bypass drainage line installed in step 3).

The sequence of removing the drainage wires in step 8) is: first the middle phase, then the outer phase, and then the inner phase.

The beneficial effects of the present invention are: the present invention adopts the construction form of two insulated bucket trucks cooperating with each other, and on the basis of ensuring safe operation and safe use of electricity, it realizes the replacement switch of the 10KV line with load, without stopping the power consumption of one user. Under the circumstances, realizing the replacement of the isolation switch provides a new working mode for the field of electric power engineering online maintenance, and will bring huge economic benefits to both the power supply and power consumption enterprises.

Detailed ways

The construction method of the present invention requires a working team of at least 6 people, at least one of whom has more than 3 years of practical work experience in power distribution and live work, is familiar with equipment conditions, has certain organizational capabilities and accident handling capabilities, and has been specially trained by the person in charge of the work , the person who passes the test is the person in charge (guardian), 4 people who have passed the special training for 10kV distribution line live work, and the people who have passed the test and hold the job certificate are respectively used as the operators in the insulated arm car, and 1 person who has passed the 10kV distribution line Special training for electric lines, personnel who have passed the examination and hold employment certificates shall serve as ground operators.

The construction method of the present invention should at least be equipped with following implements and materials:

Table 1. Personal safety protective equipment

Table 2. Standing equipment

Table 3. Insulation and shielding tools

serial number name Specification/Number unit quantity Remark 1 insulation blanket YS241-01-04 piece 16 2 insulating hose YS201-06-01 root twenty four 3 insulating clip YS211-03-05 Only 40

Table 4. Insulation tools

serial number name Specification/Number unit quantity Remark 1 Insulated drain wire 50mm2×7m root 3 2 insulation rope root 2 3 insulating rope vice 2 4 Telescopic insulating operating rod vice 1

Table 5. Other tools: Tools required for conventional line construction, such as wrenches.

serial number name Specification/Number unit quantity Remark 1 personal tool set 2 2 electric wrench Bundle 2

Table 6. Materials: including device materials and consumable materials.

Construction method of the present invention specifically comprises the following steps:

Step 1. Construction preparation.

The construction preparation stage is mainly a series of preparatory activities before construction, including condition inspection, assembly configuration and staffing.

In the construction preparation stage, first of all, the person in charge of the work checks the name of the working line and the number of the cement pole. Operating conditions (what are the conditions for having live working conditions?), check the weather conditions, check the safety measures, and supplement safety measures if necessary.

The meteorological conditions to be inspected usually need to meet the following points: 1. The weather should be fine, without thunder, rain, snow, fog; 2. Temperature: -5 ~ 35 ℃; 3. Wind force: <5 levels; 4. Relative humidity of the air <80%.

After the above conditions are checked, the person in charge of the work will contact the dispatcher to obtain the dispatcher's work permit and confirm that the line recloser has been disabled.

Then, arrange the work site, including setting up safety guardrails, operation signs and related warning signs on the work site.

Next, the insulated bucket truck operators park the insulated bucket truck. This construction method requires two insulated bucket trucks, numbered No. 1 and No. 2, and each insulated bucket truck is equipped with two operators. , respectively numbered as operator No. 1 and operator No. 2.

The specific process of parking the insulated bucket truck is as follows:

1. The operators park the No. 1 car and No. 2 car in the best position respectively. During this process, the following points need to be followed: 1. It should be convenient for the working bucket of the insulated bucket arm truck to reach the working position, avoiding nearby power lines and obstacles; 2. Avoid parking on the ditch cover; 3. Pads or sleepers should be used on soft ground. When padded, the pads overlap no more than 2 pieces, forming an angle of 45°; 4. If the parking position is on a slope, the slope of the parking position ≯7°, the front of the insulated bucket truck should be parked facing downhill.

2. The operator operates No. 1 car and No. 2 car to carry out outriggers. During the process, the following points need to be followed: 1. The order of outriggers should be correct: the horizontal outriggers should be extended first, and then the vertical outriggers should be extended; 2. .When parking on a slope, the front outriggers should be supported first, and then the rear outriggers should be supported; 3. The support should be in place, and the front, rear, left and right sides of the vehicle should be level; the four wheels should be off the ground; 4. After parking on a slope and adjusting the level, the front and rear heights of the vehicle should be 3°.

3. The operators ground the No. 1 car and the No. 2 car reliably, and the burial depth of the temporary grounding body is not less than 0.6m.

After parking the insulated bucket truck, check the insulating tools. The specific process is as follows:

1. Put the insulating tools and appliances on the moisture-proof mat (blanket). The moisture-proof mat (blanket) should be clean and dry. The insulating tools and appliances should not be mixed with metal tools and materials.

2. Appearance inspection of insulation tools: insulation tools should not be deformed and damaged, flexible in operation, and accurate in measurement; personal safety protective equipment, shielding, and isolation equipment should be free of pinholes, trachoma, and cracks; impact tests should be carried out; inspectors must wear them Clean, dry gloves.

3. Use an insulation resistance tester to test the surface insulation resistance of insulating tools: the resistance value should not be lower than 700MΩ.

Afterwards, the operators of the insulating bucket truck inspect the insulating bucket truck, including checking the surface condition of the insulating bucket truck: the insulating part should be clean and free of crack damage.

After the inspection is completed, the workers in the bucket wear corresponding work clothes and safety protective equipment according to the safe operation requirements of the power system, and carry tools into the working bucket of the insulated bucket arm truck, and the operators in the bucket fasten the insulating safety belt.

At this point, the construction preparation stage is completed and the construction stage is officially entered.

Step 2, electrical testing points and setting insulation shielding.

2.1 Electricity test.

Worker No. 1 (operator inside the bucket) in the two insulated bucket arm vehicles used a high-voltage electroscope to conduct an electric test on the cross arm and top phase hoop to confirm that the insulator has no leakage current.

The following points need to be followed in this process: 1. When transferring the working bucket, pay attention to the poles, towers and lines around the insulated bucket arm truck. The distance between the metal part of the insulated arm and the charged body and ground potential object is greater than 1.0m; 2. Operation 3. The No. 1 operator in the bucket should wear insulating gloves when inspecting the electricity; the electroscope should be self-inspected before use and tested on the live body.

2.2 Electricity measurement.

Worker No. 1 uses a clamp ammeter to measure the current of each phase drain line. In this process, the following points need to be followed: 1. Pay attention to keep a safe distance from the live parts; 2. Use the clamp ammeter correctly.

2.3 Set up insulation shielding.

Car No. 1 and No. 2 are respectively responsible for the incoming line side and outgoing line side of the switch to be operated; after the operator in the bucket obtains the consent of the person in charge of the work: 1) Measure the load current with an ammeter to confirm that it is connected to the drain line and the bypass vacuum isolating switch 2) Use insulating blankets and insulating hoses to insulate and shield the live parts and grounding bodies in the working channel that do not meet the working safety distance.

Under the supervision of the person in charge of the work, the electrician in the bucket moves the insulating bucket to a suitable working position inside, and insulates the parts that may be touched during the operation according to the principle of "from near to far, from bottom to top, first big and then small" Shielding and isolation: 1) The position and sequence of insulation, shielding and isolation are as follows: A, the inner phase first, then the outer phase, and then the middle phase; B, the switch leads first, and then the main line. C, the sequence in one phase: cable terminal leads, arrester leads, wires, strain clamps, strain insulator strings; 2) The electrician in the bucket should move gently and keep a safe distance (0.4m relative to the ground, 0.6m between phases) ); 3) The insulation, shielding and isolation measures should be tight and firm, and the overlapping length of the insulation and shielding combination should not be less than 15cm.

Step 3, operate the switch to lock it, and install the bypass drain line.

3.1. The No. 2 operator (in-car operator) of the No. 1 car operates the No. 1 car to make the car reach the proper position, and the No. 1 operator of the No. 1 car operates the switch to lock the switch;

In this process, the following points need to be paid attention to: 1. Pay attention to keep a safe distance from the live parts; 2. It must be operated with an insulating operating lever; 3. Confirm that the switch is locked.

3.2, No. 1 car and No. 2 car are respectively responsible for the installation of the bypass drain line on the incoming line side and the outgoing line side of the switch. First install the middle phase drain line, then install the outer phase drain line, and then install the inner phase drain line; here The following points need to be paid attention to during the process: 1. The installation of the drain wires on the inlet side and the outlet side of the switch must be done at the same time by the No. 1 operator of No. 1 car and No. 2 car; 2. The installation at the contact point must be tight; 3. Every After the drain wire is installed, its current must be measured with a clamp ammeter to confirm its normal operation.

Step 4, the old switch is out of operation, and the original drain wires on both sides of the switch are removed.

4.1. Personnel No. 2 of Car No. 1 operates Car No. 1 to make the car reach the proper position. Personnel No. 1 of Car No. 1 operates the switch to make it in the off position and removes the circuit breaker. At this time, the line of the switch is disconnected, the bypass drain line installed in step 3 works, and the original line is connected through the bypass drain line, which does not affect the operation of the electric load.

4.2, No. 1 car and No. 2 car are respectively responsible for the drain wires on the inlet side and outlet side of the switch; after the operator obtains the consent of the person in charge of the work: 1) No. 1 car and No. 2 car No. 2 operators operate the insulated bucket arm truck , so that the car reaches the appropriate position, 2) No. 1 car and No. 2 car No. 1 operator will remove the lead wire; in this process, the following points need to be paid attention to: 1. Pay attention to keep a safe distance from the live parts; 2. Transfer the working bucket Attention should be paid to the pole towers and lines around the insulated bucket arm truck. The distance between the metal part of the insulated arm and the charged body and ground potential object is greater than 1.0m; 4. The order of removing the leads: first remove the inner phase, then remove the outer phase, and then remove the middle phase lead.

Step 5, remove the original switch.

5.1, No. 2 operator of No. 1 car operates No. 1 car to make the car reach the proper position;

5.2. The No. 2 operator of the No. 1 car operates the small crane (the lifting device on the insulated bucket arm car), so that the hook is in a proper position above the switch;

5.3. The No. 1 operator of the No. 1 car hangs the hook on the rope cover of the human crane switch, retracts the traction rope of the small crane, and makes the traction rope slightly stressed;

5.3. The No. 2 operator of the No. 2 car operates the No. 2 car to make the car reach the proper position;

5.4, No. 1 operator of No. 2 car removes the fixing screws of the switch and the switch bracket or the counter-pin nut of the switch bracket and the fixing hoop of the cement rod (the counter-pin nut is to connect the switch bracket and the fixing hoop of the cement rod) fastening parts);

5.5, No. 1 car No. 2 operators operate the small crane to hoist the switch to the ground.

In this process, the following points should be paid attention to: 1. Pay attention to keep a safe distance from the live parts; 2. When transferring the working bucket, pay attention to the poles, towers and lines around the insulating arm truck, and the metal parts of the insulating arm are in contact with the live parts and The distance of the ground potential object is greater than 1.0m; 3. When hanging the switch, it should be stable, avoid lifting and rotating to prevent the switch from colliding with the pole.

Step 6. Detect and hoist the new switch.

6.1. Open and close the new switch 2-3 times to confirm that the new switch should be flexible and the instructions are correct;

6.2. Use a 2500V insulation resistance meter to measure the phase-to-phase and phase-to-ground insulation resistance, which should be greater than 500 megohms;

6.3. The ground operator installs the lead wires on both sides of the circuit breaker on the new column, covers the insulation cover, and pulls the circuit breaker;

6.4, No. 2 operator of No. 1 car operates No. 1 car to make the car reach the proper position;

6.5. Operator No. 2 of No. 1 car operates the small crane so that the hook is in a proper position above the switch;

6.6. Operator No. 2 of No. 1 car operates the small crane to hoist the switch to the position to be installed;

6.7. The No. 2 operator of the No. 2 car operates the No. 2 car to make the car reach the proper position;

6.8. The No. 1 operator of the No. 2 car tightens the fixing screws of the switch and the switch bracket or the counter-pin nut of the switch bracket and the cement pole fixing hoop.

In this process, the following points should be paid attention to: 1. Pay attention to keep a safe distance from the live parts; 2. When transferring the working bucket, pay attention to the poles, towers and lines around the insulating arm truck, and the metal parts of the insulating arm are in contact with the live parts and The distance of the ground potential object is greater than 1.0m; 3. When hanging the switch, it should be stable, avoid lifting and rotating to prevent the switch from colliding with the pole.

Step 7, Lap the lead wires on both sides of the circuit breaker on the column.

7.1, No. 1 operator of No. 1 car and No. 2 take lead wires on both sides of the circuit breaker on the live connection post;

7.2. The operator closes the circuit breaker on the pole and confirms that the current has been shunted with an ammeter.

In this process, the following points should be paid attention to: 1. Pay attention to keep a safe distance from the live parts; 2. When transferring the working bucket, pay attention to the poles, towers and lines around the insulating arm truck, and the metal parts of the insulating arm are in contact with the live parts and The distance of the ground potential object is greater than 1.0m.

The construction process and quality of lead wires shall meet the requirements of construction and acceptance specifications:

1) The length of the lead wire is appropriate and the arc is uniform;

2) There are no loose strands or broken strands in the lead wire;

3) The distance between the lead wire and the ground potential component should not be less than 20cm, and the phase interval should not be less than 30cm;

4) The shims of parallel groove clamps are neat and without skewing, and the lap joints are tight;

5) There are no less than 2 parallel groove clamps for each phase lead wire, and the length of the lead wire passing through the clamp is about 2-3cm, and the width of one clamp should be reserved between the parallel groove clamps.

Step 8, put the new switch into operation and remove the bypass drain wire.

8.1, No. 2 operator of No. 1 car operates No. 1 car to make the car reach the proper position;

8.2, No. 1 operator of No. 1 car operates the switch to make it in the closed position;

8.3. The No. 1 operator of No. 1 car uses a clamp ammeter to measure whether the current of each phase lead line of the switch is normal, and confirms that the switch has been operating normally; if it is operating normally, proceed to the next step;

8.4, No. 1 operator of No. 1 car and No. 2 car removes the bypass drainage line installed in step 3 after obtaining the consent of the person in charge of the work.

The following points should be paid attention to in this process: 1. The order of dismantling: first the middle phase, then the outer phase, and then the inner phase; 2. The No. 1 operator of the No. 1 car and the No. 2 car must be at the same time; 3. It should be noted that Keep a safe distance from the live parts; 4. When transferring the working bucket, pay attention to the towers and lines around the insulated arm truck. The distance between the metal part of the insulated arm and the charged body and ground potential object is greater than 1.0m.

Step 9, remove the insulation shielding.

After the replacement operation is completed, the operators of No. 1 and No. 2 cars remove the insulation and shielding equipment on the grounding body and live parts after obtaining the consent of the person in charge of the work.

During this process, the following points should be paid attention to: 1. Pay attention to keep a safe distance from the live parts; 2. Follow the principle of from top to bottom, from far to near, first grounding body and then live body; 3. Car No. 1 and Car No. 2 4. The order of dismantling: first the middle phase, then the outer phase, and then the inner phase.

Step 10, evacuate the tower.

The operators in the bucket check and confirm that the line equipment is in normal operation. After there are no omissions or defects, they should evacuate the live area and return to the ground.

At this point, the construction process is complete. Afterwards, the person in charge organized the team members to clean up the tools and the site, reset the parts of the insulated bucket truck, retract the outriggers of the insulated bucket truck, and sort out the tools and materials. Put the tools and utensils into a special box (bag) after cleaning. Clean up the scene. When parking on a slope, the rear outriggers should be retracted first, and then the front outriggers should be retracted; the sequence of retracting the outriggers should first retract the vertical outriggers, and then retract the horizontal outriggers. After the work is completed, report the end of the work to the dispatcher.

Claims (10)

1. The construction method for replacing the switchgear on the pole with the load of the insulated bucket arm truck insulating gloves is characterized in that: the construction method includes the following steps: 1) Construction preparation: check the meteorological conditions, surrounding environment, line installation and safety measures, arrange the site, and place insulating bucket trucks and insulating tools; 2) Electrical inspection and electrical measurement and insulation shielding; 3) Operate the switch to lock it, and install bypass drain wires on the incoming line side and outgoing line side of the switch respectively; 4) The original switch is out of operation, and the original drainage wires on both sides of the switch are removed; 5) Remove the original switch; 6) Detect and hoist the new switch; 7) Lap the lead wires on both sides of the circuit breaker on the live column; 8) The new switch is put into operation and the bypass drain line is removed; 9) Remove insulation shielding; 10) Evacuate the tower. 2. The construction method for replacing the switchgear on the pole with the load of the insulated bucket arm truck insulated glove as claimed in claim 1, characterized in that: the construction preparation in step 1) includes: 1.1. Check the meteorological conditions, surrounding environment, wiring devices and safety measures; 1.2. Arranging the site: set up safety guardrails, operation signs and related warning signs at the work site; 1.3. Number the insulated bucket truck and the staff on it and place the insulated bucket truck. The insulated bucket truck reaches the working position and avoids nearby power lines and obstacles. Avoid parking on the ditch cover. The insulated bucket truck The order of outriggers is to first extend the horizontal outriggers, and then extend the vertical outriggers. After the support is in place, the front, rear, left, and right sides of the vehicle are horizontal, and the four wheels are off the ground. Overlap no more than 2 blocks and form an angle of 45° with each other. When the parking position is on a slope, the parking slope is ≯7°, and the front of the car is parked in a downhill direction. The front outriggers are supported first, and the rear outriggers are supported. ≯3°, the buried depth of the temporary grounding body of the insulated bucket arm truck is ≮0.6m; 1.4. Inspect the insulating tools and appliances. Use an insulation resistance tester to test the surface insulation resistance of the insulating tools and appliances. The resistance value is not less than 700MΩ. The inspected insulating tools and appliances are placed on the moisture-proof mat. 3. The construction method for replacing the switchgear on the pole with the load of the insulated bucket arm truck insulated gloves as claimed in claim 1, characterized in that: the step 2) specifically includes the following steps: 2.1. Electricity inspection: No. 1 operator in each insulated bucket arm vehicle uses a high-voltage electroscope to conduct an electric inspection on the cross arm and top phase hoop to confirm that the insulator has no leakage current; 2.2. Electricity measurement: No. 1 operator in each insulated bucket arm car uses a clamp ammeter to measure the current of each phase's drain wire; 2.3. Set up insulation shielding: use insulating blankets and insulating hoses to insulate and shield the live parts and grounding bodies in the working channel that do not meet the working safety distance. 4. The construction method for replacing the switchgear on the pole with the load of the insulated bucket arm truck insulated gloves as claimed in claim 1, characterized in that: the order of removing the drain wire in the step 4) is: first remove the inner side phase, then Remove the outer phase, and then remove the middle phase lead. 5. The construction method for replacing the switchgear on the pole with the load of the insulated bucket arm truck insulated gloves as claimed in claim 1, characterized in that: the step 5) specifically includes the following steps: 5.1, No. 2 operator of No. 1 insulated bucket arm truck operates the small crane, so that the hook is in an appropriate position above the switch; 5.2. Hang the hook on the rope cover of the human crane switch, and close the traction rope of the small crane, so that the traction rope is slightly stressed; 5.3. The No. 2 operator of the No. 2 insulated bucket arm truck removes the fixing screws of the switch and the switch bracket, or the counter-pin nut of the switch bracket and the cement pole fixing hoop; 5.4. Operator No. 2 of No. 1 insulated arm truck operates a small crane to hoist the switch to the ground. 6. The construction method for replacing the switchgear on the pole with the load of the insulated bucket arm truck insulated glove as claimed in claim 1, characterized in that the detection of new switches in the step 6) includes the following steps: 6.1. Open and close the new switch 2-3 times to confirm that the switch is flexible and the instructions are correct; 6.2. Use a 2500V insulation resistance meter to measure the insulation resistance between phases and phases to ensure that both are greater than 500 megohms. 7. The construction method for replacing the switchgear on the pole with the load of the insulated bucket arm truck insulated glove according to claim 1, characterized in that: the hoisting of the new switch in the step 6) includes the following steps: 6.3. Operator No. 2 of No. 1 insulated bucket arm truck operates the small crane and lifts the switch to the belt installation position; 6.4. The No. 2 operator of the No. 2 insulated bucket arm truck tightens the fixing screws of the switch and the switch house, or the counter-pin nuts of the switch bracket and the cement pole fixing hoop. 8. The construction method for replacing the switchgear on the pole with the load of the insulated bucket arm truck insulated gloves as claimed in claim 1, characterized in that: the step 7) specifically includes the following steps: 7.1. The ground operators install the drain wires on both sides of the circuit breaker on the new column, cover the insulation cover, and pull the circuit breaker; 7.2. The operators in the two insulated bucket arm vehicles respectively lap the lead wires on both sides of the circuit breaker on the column; 7.3. Close the circuit breaker on the column, and use the ammeter to confirm that the current has been shunted; 7.4. The operators in the two insulated arm trucks removed the lead wires on both sides of the circuit breaker on the pole respectively. 9. The construction method for replacing the switchgear on the pole with the load of the insulated bucket arm truck insulated glove as claimed in claim 1, characterized in that: the step 8) specifically includes the following steps: 8.1. The No. 1 operator in the No. 1 insulating arm car operates the switch to make it in the closing position; 8.2. Use a clamp ammeter to measure whether the current of each phase of the switch is normal, so as to confirm the normal operation of the switch; 8.3. After confirming that it is correct, remove the bypass drainage line installed in step 3). 10. The construction method for replacing the switchgear on the pole with the load of the insulated bucket arm truck insulated gloves as claimed in claim 1, characterized in that: the order of removing the drain wires in the step 8) is: first the middle phase, then the outer phase , and then the inner phase.