CN-122022448-A - Method for optimizing installation process flow of electric hoist single-beam crane of transformer substation

CN122022448ACN 122022448 ACN122022448 ACN 122022448ACN-122022448-A

Abstract

The invention belongs to the technical field of power engineering construction, and provides a complete transformer substation electric hoist single-beam crane installation process flow optimization special construction scheme aiming at the installation engineering of a 110kV transformer substation GIS room 10T-9.25m transformer substation electric hoist single-beam crane. The method comprises the steps of firstly defining engineering outline and writing basis, planning construction progress, equipment materials and personnel configuration plan, detailing processes such as hoisting, assembling, electric installation and debugging of a crane, making acceptance standards of key links such as track installation and the like, simultaneously completing risk classification identification, matching construction safety, civilization and progress guarantee measures, establishing an emergency rescue system, verifying hoisting feasibility through tower crane performance calculation, and assisting related construction drawings and management and control forms. The scheme realizes the safety control and the quality control of the whole construction process, ensures that the installation of the electric hoist single-beam crane of the transformer substation reaches the standard and has reliable use conditions.

Inventors

ZHANG JIAN
CHEN ZHIXIN
HUANG RUIGANG
KONG YUE
LIANG GUOJIN
XU LIANG
LIU YONGMING
WANG SHENG

Assignees

广东能洋电力建设有限公司

Dates

Publication Date: 20260512
Application Date: 20251223

Claims (10)

1. The optimization method of the installation process flow of the electric hoist single-beam crane of the transformer substation is characterized by being used for the installation engineering of the electric hoist single-beam crane of the transformer substation of 10T-9.25m in a GIS room of a 110kV transformer substation, and comprising the following steps: Step 1, pre-construction preparation, including personnel qualification verification, tool performance verification, construction area division and risk classification identification, wherein the risk classification identification determines a risk level according to a formula of a risk value = a result x exposure x possibility; Step 2, equipment unpacking and acceptance checking the integrity of the crane component according to a packing list, and synchronously detecting the dimensional accuracy and performance parameters of the component; step 3, checking the tower crane in place and the test crane, positioning the tower crane according to a preset position, then testing the crane girder, hoisting the girder away from the ground by a preset height during test crane, and maintaining the preset duration, and checking the reliability of the lifting appliance and the braking performance of the tower crane; step 4, installing a crane beam and a track, hoisting the crane beam to the bracket, correcting span and straightness, installing the track according to a preset deviation standard, and fixing a car bumper; step 5, assembling the crane, symmetrically fastening the main beam and the end beam through refining bolts, installing an electric hoist and debugging a lifting mechanism; step 6, electric installation and debugging are carried out, so that the laying of electric circuits and the wiring of equipment of the crane are completed, the insulation resistance of each loop is detected, and a limiting device is debugged; Step 7, multi-stage linkage acceptance, namely carrying out self-check of a construction unit, review of a supervision unit and professional acceptance of a third party in sequence, and completing handover after acceptance is qualified; step 8, cleaning the site after construction and protecting equipment, performing global cleaning on the construction area and taking protective measures on the crane; step 9, dynamically controlling risks in the whole process, updating a risk list in real time according to the construction stage, and implementing control measures; And 10, carrying out emergency pre-guarantee, carrying out emergency drilling before construction and configuring emergency materials with preset specifications on site.
2. The optimization method for the installation process flow of the electric hoist single-beam crane of the transformer substation according to claim 1, wherein the preset height of the test crane in the step 3 is 100-200mm, the preset duration is 10 minutes, and the stress state of the crane rigging and the operation stability of the tower crane are synchronously detected during the test crane.
3. The optimization method for the installation process flow of the electric hoist single-beam crane of the transformer substation according to claim 1, wherein the risk classification identified in the step 1 is classified into medium risk, low risk and acceptable risk, wherein the risk value corresponding to the medium risk is more than or equal to 70, the risk value corresponding to the low risk is 25-69, and the risk value corresponding to the acceptable risk is less than or equal to 24.
4. The optimization method for the installation process flow of the electric hoist single-beam crane of the transformer substation according to claim 1 is characterized in that the preset deviation standard of the track installation in the step4 is that the deviation of the actual center line of the track to the actual center line of the crane beam is not more than +/-10 mm, the longitudinal levelness of the track is not more than 1/1500, and the difference between the highest point and the lowest point in the whole process is not more than 10mm.
5. The optimization method for the installation process flow of the electric hoist single-beam crane of the transformer substation according to claim 1, wherein the tightening of the refined bolts in the step 5 is divided into primary tightening and final tightening, and the torque of the final tightening is controlled to be 588-1030N M, and the sampling rate of the bolt after final screwing is not lower than 20%.
6. The optimization method for the installation process flow of the electric hoist single-beam crane of the transformer substation according to claim 1 is characterized in that the detection standard of the insulation resistance of each loop in the step 6 is that the insulation resistance of the main loop and the control loop to the ground is not less than 1MΩ in a general environment and not less than 0.5MΩ in a humid environment.
7. The optimization method of the installation process flow of the electric hoist single-beam crane of the transformer substation, which is characterized in that the specific flow of the multi-stage linkage acceptance in the step 7 is that after a construction unit completes self-inspection and submits a self-inspection report, a supervision unit completes re-inspection within 24 hours, a qualified third party carries out formal acceptance after the re-inspection, and the construction unit is restarted to accept the acceptance after the construction unit is modified when the acceptance is failed.
8. The optimization method for the installation process flow of the electric hoist single-beam crane of the transformer substation, which is disclosed in claim 1, is characterized in that the specific requirements of personnel qualification verification in step 1 are that a crane operator, a cable operator, an electrician and an electric welder need to hold corresponding special operation evidences, and the high-altitude operators need to carry out physical examination once every year.
9. The method for optimizing the installation process flow of the electric hoist single-beam crane of the transformer substation according to claim 1, wherein the emergency materials in the step 10 comprise insulating rods, insulating shoes, insulating gloves, dry powder extinguishers, emergency stretchers and disinfection medicines, and the emergency exercise before construction comprises simulated treatment of four scenes of electric shock, high falling, object striking and mechanical injury.
10. The optimization method for the installation process flow of the single-beam crane of the electric hoist of the transformer substation according to any one of claims 1 to 9, wherein the tower crane in the step 3 is selected so as to meet the requirement that the lifting moment is greater than or equal to 121.44t M, the safety coefficient of the sling is not lower than 3 times of the actual lifting capacity during lifting, and the contact position of the sling and the corner of the component is required to be additionally provided with a protection tile for protection.

Description

Method for optimizing installation process flow of electric hoist single-beam crane of transformer substation Technical Field The invention relates to the technical field of power engineering construction, in particular to a method for optimizing the installation process flow of an electric hoist single-beam crane of a transformer substation. Background In 110kV transformer substation construction engineering, installation of a transformer substation electric hoist single-beam crane (special for a GIS room) is a key procedure, and construction quality of the transformer substation electric hoist single-beam crane directly influences subsequent equipment overhaul and operation and maintenance efficiency of the transformer substation. The traditional electric hoist single-beam crane installation construction process of the transformer substation has the defects that the working procedure is loose, if the crane beam installation and the track correction are disjointed, the track deviation is easy to exceed the standard, the risk management and control is lagged, most of the problems are post-treatment, the front pre-control is lacking in danger hidden danger such as the overturning of the crane and the high-altitude falling, the test hoisting link is simply lifted, the accurate verification of the reliability of the lifting appliance and the braking performance of the crane is not carried out, the verification and acceptance process is independently carried out, the construction unit self-test and the third party verification and acceptance are repeated, the construction period is prolonged, the emergency preparation is not enough, the emergency material configuration is not standard, the drilling scene is single, and the quick response to the sudden accident is impossible. In the prior art, the optimization of the relevant construction flow of the installation of the electric hoist single-beam crane of the transformer substation is focused on a single link, if only the hoisting process or the acceptance standard is optimized, a complete flow collaborative optimization system is not formed, the comprehensive requirements of the construction efficiency, the safety control and the engineering quality are difficult to meet at the same time, and the installation operation of the electric hoist single-beam crane of the transformer substation in a narrow space of a GIS room of a 110kV transformer substation cannot be adapted. Disclosure of Invention The invention aims to solve the problems in the background art, and provides a method for optimizing the installation process flow of an electric hoist single-beam crane of a transformer substation. The specific technical scheme is as follows: The method for optimizing the installation process flow of the electric hoist single-beam crane of the transformer substation is used for the installation engineering of the electric hoist single-beam crane of the transformer substation of 10T-9.25m in a GIS room of a 110kV transformer substation, and comprises the following steps: Step 1, pre-construction preparation, including personnel qualification verification, tool performance verification, construction area division and risk classification identification, wherein the risk classification identification determines a risk level according to a formula of a risk value = a result x exposure x possibility; Step 2, equipment unpacking and acceptance checking the integrity of the crane component according to a packing list, and synchronously detecting the dimensional accuracy and performance parameters of the component; step 3, checking the tower crane in place and the test crane, positioning the tower crane according to a preset position, then testing the crane girder, hoisting the girder away from the ground by a preset height during test crane, and maintaining the preset duration, and checking the reliability of the lifting appliance and the braking performance of the tower crane; step 4, installing a crane beam and a track, hoisting the crane beam to the bracket, correcting span and straightness, installing the track according to a preset deviation standard, and fixing a car bumper; step 5, assembling the crane, symmetrically fastening the main beam and the end beam through refining bolts, installing an electric hoist and debugging a lifting mechanism; step 6, electric installation and debugging are carried out, so that the laying of electric circuits and the wiring of equipment of the crane are completed, the insulation resistance of each loop is detected, and a limiting device is debugged; Step 7, multi-stage linkage acceptance, namely carrying out self-check of a construction unit, review of a supervision unit and professional acceptance of a third party in sequence, and completing handover after acceptance is qualified; step 8, cleaning the site after construction and protecting equipment, performing global cleaning on the construction area and taking protective measures on t