How often is the passenger elevator overhauled? Does the country have relevant regulations?

The state has no rigid standards for landlords in Beijing.

In the technical requirements of elevator maintenance

3. 1.3 Elevator repair works with normal operating frequency are divided into medium repair and overhaul. When the main engine and electronic control equipment are seriously worn or their performance is completely degraded, they should be overhauled; When some important parts are seriously worn and their running performance declines, intermediate repair should be carried out. Medium repair once every 3 years, overhaul once every 5-6 years. If the equipment performance is in good condition, the cycle can be extended appropriately. According to the inspection results, the medium repair can be determined by referring to relevant overhaul projects. When the main supporting equipment of the elevator is suddenly damaged and needs to be replaced immediately, this kind of project also belongs to medium repair, which is not limited by time, and its technical requirements are the same as that of overhaul. If the manufacturer has specific regulations and special requirements for technical indicators, it can be stipulated by the manufacturer. The elevators after medium repair and overhaul shall meet the requirements of safety standards.

DB Beijing local standard

DBl 1/040—94

Technical requirements for elevator maintenance 1994-03-20 released.

1994-04-01implemented by Beijing Municipal Bureau of Technical Supervision

Issue technical requirements for elevator maintenance.

1 main contents and scope of application this standard specifies elevator maintenance items and requirements, as well as technical requirements of maintenance projects. This standard applies to residential elevators, not to grocery ladders and hydraulic ladders. Other uses of elevators can also be referenced.

2 reference standard

GB7588 Safety Code for Elevator Manufacture and Installation

GBl0058 elevator technical conditions

GBl0059 elevator test method

GBl0060 Code for Installation and Acceptance of Elevator

GB50 182 Code for Construction and Acceptance of Elevator Electrical Equipment.

3 General requirements for elevator maintenance

3. 1 elevator maintenance is divided into: maintenance, daily maintenance and repair works.

3. 1. 1 elevator maintenance is divided into weekly inspection maintenance, monthly maintenance, semi-annual maintenance and one-year maintenance. If the manufacturer has special requirements, it shall meet the requirements of the manufacturer. If the equipment is abnormal during maintenance, it should be checked and repaired before operation.

3. 1.2 The daily maintenance of elevator refers to the inspection and maintenance of common faults in elevator operation, and the normal operation of equipment can be realized by adjusting or replacing parts. When dealing with emergency failures, the safety operation procedures should be strictly observed.

3. 1.3 Elevator repair works with normal operating frequency are divided into medium repair and overhaul. When the main engine and electronic control equipment are seriously worn or their performance is completely degraded, they should be overhauled; When some important parts are seriously worn and their running performance declines, intermediate repair should be carried out. Medium repair once every 3 years, overhaul once every 5-6 years. If the equipment performance is in good condition, the cycle can be extended appropriately. According to the inspection results, the medium repair can be determined by referring to relevant overhaul projects. When the main supporting equipment of the elevator is suddenly damaged and needs to be replaced immediately, this kind of project also belongs to medium repair, which is not limited by time, and its technical requirements are the same as that of overhaul. If the manufacturer has specific regulations and special requirements for technical indicators, it can be stipulated by the manufacturer. The elevators after medium repair and overhaul shall meet the requirements of safety standards.

3.2 After maintenance and repair, the elevator operation performance should be normal. All safety devices must be flexible and reliable, and meet the standard requirements. 4 Technical requirements for maintenance

4. 1 week patrol maintenance weekly patrol maintenance is mainly to check whether the following components work normally, cleanly and lubricated.

4. 1. 1 power switch and safety switch a. check the fuse and fuse contact, the contact is firm, and there should be no sparking phenomenon; B emergency stop, safety window and bottom hole safety switch shall be flexible and reliable.

4. 1.2 reducer A. There should be no abnormal vibration when running smoothly; B. The oil level height of the reducer shall be kept within the specified oil level line; C. The oil temperature of the reducer is not higher than 85℃.

4. 1.3 Motor and generator set A. The commutator (copper head) shall be kept clean and the sparks shall meet the requirements during operation; B the temperature rise of the motor shall not be higher than the nameplate; C. When the motor is running, the speed should be normal and there is no abnormal noise.

4. 1.4 Brake A. The brake should be flexible and reliable with even clearance; B the brake wrench should be hung in an obvious place in the machine room.

4. 1.5 control cabinet All electrical components in the control cabinet work normally and the instrument display is accurate.

4. 1.6 Layer selection system A. The sliding part of the mechanical laminator should be flexible and reliable; B the action of the electric layer selector should be normal and accurate. 4. 1.7 speed-limiting system A. The speed limiter should operate normally; B. the tensioning device shall be reliable.

4. 1.8 hall door and car door system a. check the reliability of the hall door lock; B. The hall door and car door switches run smoothly without any impact sound; C. The functions of safety touch panel and photoelectric device shall be reliable; D in the non-unlocking area, the landing door can be automatically closed (using this device). 4. 1.9 The displays and buttons in the car and on the floor should be normal and complete.

4. 1. 10 shaft system A. The clearance between the car and the counterweight guide shoe is even, and the shoe lining is not seriously worn; B. The binding of fixed cables shall be firm and free from damage; Keep the pit clean and dry.

4. The rotating and sliding parts of electromechanical parts listed above1.11shall be well lubricated and clean.

4.2. Monthly maintenance is to clean, lubricate and inspect all parts of the elevator, especially the safety devices, on the basis of weekly patrol maintenance.

4.2. 1 reducer

4.2. 1. 1 The reducer shall have no abnormal noise, and the surface dust and grease shall be removed.

4.2. 1.2 Oil the rolling bearing of the worm shaft and check whether the coupling is damaged.

4.2. 1.3 Check whether the rope groove of the traction sheave is worn uniformly, and tighten the bolts of all parts of the traction sheave.

4.2.2 Motor and generator set

4.2.2. 1 Eliminate internal and external dust and oil stains.

Whether the 4.2.2.2 carbon brush is in good contact with the commutator, whether there is carbon deposit in the commutator groove, and the carbon brush should be replaced when its wear exceeds 1/2 of the original length.

4.2.2.3 speed measuring system works normally and the transmission system is not damaged.

brake

4.2.3. 1 Check the lubrication between electromagnet core and copper sleeve.

4.2.3.2, tighten the connecting bolts.

The temperature rise of 4.2.3.3 coil shall not exceed 60℃.

When 4.2.3.4 brakes, the brake wheel and brake shoe are tightly closed, and the clearance on both sides is consistent during operation, and the clearance is not more than 0.7mm (except as specified by the manufacturer).

Speed limiting system

4.2.4. 1 Remove foreign bodies and oil stains from the rope clamping claws.

4.2.4.2 force oil at rotating pin shaft.

4.2.4.3, check whether there is abnormal wear on the wheel grooves of the speed limiter wheel and the tensioner wheel.

. 4.2.4.4, check whether the tensioner and electrical switch are working properly.

4.2.5 Control cabinet and excitation cabinet

4.2.5. 1 Remove the dust from the internal components of the cabinet.

4.2.5.2 checks all electrical components and instruments, and adjusts or replaces insensitive and damaged components.

4.2.5.3 checks the contact ablation of contactors and relays. If the ablation is severe and uneven, repair or replace the contact.

4.2.5.4 checks the mechanical interlocking device, and makes adjustments if the action is unreliable. Note: it is forbidden to dial or insert the printed circuit board with electricity, and electrostatic treatment should be done when contacting.

Layer selection system

4.2.6. 1 Remove oil stains and dust from all parts.

4.2.6.2 oiled the steel pulley and sheave shaft, and lubricated the guide rail of the moving trolley.

4.2.6.3 adjusts the action gap or accuracy of the electric layer selector.

wirerope

4.2.7. 1 Check the corrosion and wear of wire rope.

The tension of 4.2.7.2 wire rope should be uniform.

4.2.7.3 rope head bolts should be locked and cotter pins should be complete.

4.2.8 Hall door and car door system 4.2.8. 1 Remove dust and oil stains from all parts. 4.2.8.2 inspected the roller, door guide rail and bearing of the hanging door and coated it with lubricating oil. 4.2.9 Control Panel and Display System 4.2.9. 1 Clean the buttons and switches of the control panel to ensure their sensitivity and reliability. 4.2.9.2 checks whether the outbound displays in the car and on all floors are normal and in good condition. 4.2. 10 guide rail 4.2. 10. 1 For the guide rail with automatic lubricating device, mechanical lubricating oil should be added. 4.2. 10.2 The guide rail without lubrication device shall be directly coated with calcium-based grease. 4.2. 10.3 The guide rail of the rolling guide shoe shall be kept clean. 4.2. 1 1 safety device 4. 2. 1 1 Inspection parts include: phase failure protection device, overspeed protection device, mechanical interlock device, electromechanical interlock device of hall door and car door, emergency stop switch, maintenance switch, car safety window switch, limit switch, etc. 4.2. 1 1.2 Remove grease from all safety devices. 4.2. 1 1.3 All safety devices shall be flexible and reliable without jamming. 4.2. 12 Remove the sundries in the pit, remove the dust of the buffer and parts, and keep the pit dry. 4.3 Half-year maintenance Half-year maintenance is mainly based on monthly maintenance to inspect, adjust and maintain the key parts of the elevator. 4.3. 1 Add bearing lubricating oil to the motor and generator set. 4.3. 1.2 Check and repair the carbon brush holder. 4.3. 1.3 Check and clean the commutator. 4.3.2 Traction wire rope 4.3.2. 1 Adjust the tension of wire rope, and the difference with the average value is not more than 5%. There is too much oil stain on the surface of steel wire rope in 4.3.2.2, which should be removed. And should be coated with thin and uniform ET plate pressure diluted wire rope grease. 4.3.2.3, check whether the wire rope head assembly and the rope head plate are in good condition. 4.3.2.4 checks the wire breakage and corrosion of the wire rope. 4.3.3 Guide shoes 4.3.3. 1 Clean the automatic lubrication device. 4.3.3.2 filled bearings with calcium-based grease. 4.3.3.3 checks whether the roller guide shoes on the roller have abnormal noise, and replaces the rubber, such as fracture, wear and bearing damage; When the wear of sliding guide shoe liner exceeds 1/4 of the original thickness, it should be replaced. 4.3.3.4, tighten the boot bolts. The clearance between the 4.3.3.5 fixed guide shoe and the front of the guide rail shall conform to the regulations. 4.3.4 Door opener 4.3.4. 1 Check the whole system and fill the rotating parts with grease. The 4.3.4.21/2 of the carbon brush of the door-opening motor is worn beyond the original length and should be replaced. 4.3.4.3: The transmission system is reliable and not damaged. 4.3.5 Guide rail 4.3.5. 1 Check whether the guide rail connecting plate, guide rail pressure plate, guide rail bracket and weldment are loose and welded, and whether the bolts are tightened everywhere. 4.3.5.2 cleaned the guide rail and removed the corroded part. 4.3.6 Junction box and cable 4.3.6. 1 Check each junction box, fasten each terminal and remove its dust. 4.3.6.2, check the cable for damage or breakage. 4.3.6.3, tighten the bolts of the cable rack. 4.3.7 Limit switch 4.3.7. 1 Do overtravel test on the limit switch, the overtravel distance is 150 ~ 250 mm, and the pin shaft should be filled with lubricating oil. 4.3.7.2 limit switch overtravels by 50- 150 mm, and the pin shaft should be filled with lubricating oil. 4.4 One-year maintenance One-year maintenance is mainly based on meeting the requirements of half-year maintenance, and the following inspections should also be carried out. 4.4. 1 reducer 4.4. 1. 1 Check the axial clearance and side clearance of worm gear and worm, and their values should meet the original design requirements. 4.4. 1.2 Oil change of reducer oil tank. (Unless otherwise specified by the manufacturer for the oil type and oil change cycle). 4.4. 1.3 The noise of the reducer shall not be greater than 80dB. 4.4.2 Braking 4.4.2. 1 Adjust the brake spring to ensure the accuracy and comfort of leveling. 4.4.2.2 adjusted and cleaned the iron core and added a proper amount of lubricant. 4.4.2.3: When the brake shoe wears more than the original thickness 1/4 or the rivet is exposed, the brake shoe should be replaced. 4.4.3 Speed limiting system 4.4.3. 1 Clean the speed limiting wheel, tensioning wheel and axle. 4.4.3.2 When the rope elongation of the speed limiter exceeds the standard requirements (see 5.6.2 for the limit value), the elongation part shall be cut off. 4.4.3.3, check whether the rotary connecting rod device is flexible and free from jamming. 4.4.3.4, adjust the clearance between the safety tongs wedge and the guide rail, and the clearance shall conform to the regulations and be even. 4.4.3.5, check the wear of the safety clamp wedge. 4.4.3.6 cleaned the grease off his chin. 4.4.4 Layer selection system 4.4.4. 1 Clean the layer selector and transmission mechanism. 4.4.4.2 cleaned the steel belt wheel and steel belt, and replaced the steel belt with severe corrosion, more than two fractures and continuous tooth missing. 4.4.5 Hall door and car door system 4.4.5. 1 Adjust the speed of opening and closing doors. 4.4.5.2 repairs and adjusts all components of car doors and landing doors. A. After the door is closed, the clearance shall be no more than 2 ~ 6mmb. The clearance between door leaf, door leaf and door cover, and door leaf and lower sill shall be1~ 6mm; C. The clearance between the door knife and the sill of the landing, and between the door lock roller and the sill of the car should be 5 ~10 mm ... 4.4.6 Check the counterweight guide shoes and balance block locking devices of counterweight 4.4 and 6. 1. 4.4.6.2, tighten the counterweight rope head bolt. 4.4.6.3 counterweight should be free from deformation. 4.4.7 Balance rope and balance chain 4.4.7. 1 Balance rope head should be fixed firmly and reliably, and the balance rope tensioner can float up and down flexibly during operation. 4.4.7.2 tightens the bolts of the balance chain, so there will be no collision during operation. 4.4.7.3 U-shaped fixing cards shall be equipped with locking devices. 4.4.8 Buffer 4.4.8. 1 Hydraulic buffer should be reset and refueled. Electrical switch action should be reliable. 4.4.8.2 check the levelness and verticality of the buffer and tighten the bolts. 4.4.9 Insulation and grounding test 4.4.9. 1 Test the insulation resistance of each part, and the resistance value of the power supply circuit is not less than 0.5MΩ, and that of other circuits is not less than 0.25MΩ. 4.4.9.2 tests the grounding resistance of each part, and the resistance is not more than 4Ω. 5 Overhaul items and technical requirements Elevator overhaul is mainly to disassemble, clean and adjust elevator components, and replace aging or seriously damaged equipment and accessories. 5. 1 Dismantle the reducer. Check the worm gear and worm of the reducer, clean all parts, and replace the oil seal, damping pad and badly worn bearing. 5. 1.65438+ The assembly accuracy can be slightly lower than the original installation accuracy. 5. 1.2 The meshing surface and contact point of worm gear and worm shall meet the requirements. 5. 1.3 allowable error of coaxiality between worm and motor coupling: 0.02mm for rigid connection and 0. 1mm for elastic connection. 5. 1.4 The oil used for the reducer should meet the requirements of this model, and the oil injection amount is in the middle of the upper and lower limits of the oil label, and there is no oil leakage in the box. The packing shaft head is allowed to leak a drop of oil for 3 ~ 5 minutes, and is equipped with an oil receiving box. The shaft head temperature is not higher than 75℃, and the oil temperature is not higher than 85℃. 5. 1.5 BWL reducer shall meet the following standards after assembly: a. The backlash of worm gear and worm shall be between 190 ~ 250; B when the center distance of the worm wheel is 200~300mm, it should be between 20 ~ 40μ m, and when the center distance is greater than 300mm, it should be between 30 ~ 50μ m; C. When the center distance of the worm is between 200 and 300mm, it should be between 0. 1-0. 15mm, and when the center distance is greater than 300mm, it should be between 0. 12-0. 17mm; D. The radial runout of the worm should not be greater than 30μ m.5.2 Brake Remove the cleaning brake and replace the brake shoe. 5.2. 1 Brake shoes shall not be worn eccentrically, and the brake shoes shall be in contact with the center of the brake wheel, and the contact surface shall not be less than 70%. 5.2.2 During operation, the clearance between the brake shoe and the brake wheels on both sides shall be no more than 0.7 mm (or as required by the manufacturer). 5.2.3 Lubricate the armature copper sleeve with graphite powder. 5.2.4 The temperature rise of the coil shall not exceed 60℃, and the insulation resistance of the coil shall not be less than 0.5MΩ. 5.2.5 The brake switch is sensitive and reliable. 5.3 Disassembly inspection of motor and generator set, cleaning all parts, adjusting armature, replacing oil seal, sliding bearing, carbon brush and brush spring. When disassembling, be careful not to damage the insulation of each part. 5.3. 1 The allowable roundness error of sliding bearing is not more than 0.023mm.. 5.3.2 Shaft movement shall not be greater than 4 mm ... 5.3.3 The temperature of shaft head shall not be greater than 65℃. The temperature rise of the motor shall not exceed the nameplate, and the thermal protection system of the motor shall be able to work normally. 5.3.4 When providing rated voltage, the no-load speed should not be lower than the rated value, the phase currents should be balanced, and the deviation of the average value of any phase and three phases should not be greater than 10% of the average value. 5.3.5 The insulation resistance of the winding shall not be less than 0.5MΩ；; The grounding wire is firmly crimped, and the grounding resistance is not greater than 4Ω. 5.4 Guide pulley and traction pulley shall be cleaned. When the wear and sag of the rope groove are inconsistent, the difference is110 (1.5 mm) of the rope diameter or the sheave is seriously uneven, the rope groove should be rotated again or replaced. 5.4. 1 Rotate freely after assembly, and the oil circuit is unobstructed. 5.4.2 The position deviation of the traction sheave shall not exceed 3mm before and after and 1 mm from left to right. 5.4.3 At half load, the verticality error between the guide wheel and the traction wheel should not be greater than 0.5mm.. 5.4.4 Replace the wheel shaft when the wear (sliding bearing) reaches 0.3mm. 5.5 Clean the wire rope by pulling it, and adjust the tension. When the surface of the wire rope is worn, replace the wire rope as follows: a. When the broken wires are evenly distributed among the strands, the maximum number of broken wires in a lay length exceeds 12; B. Broken wires are concentrated in one or two strands, and the maximum number of broken wires in a lay length exceeds six; C. The surface of the steel wire rope is seriously abraded and corroded, and the diameter after abrasion is less than 90% of the original diameter. 5.5. 1 The length of wire rope shall ensure the free distance required by 5. 17. 1. 5.5.2 The tension difference between wire ropes shall be no more than 5%. 5.6 Speed-limiting system Disassemble and clean the speed-limiting system and linkage mechanism, check the wear of each component, and replace the bearings of the speed limiter and tensioner. 5.6. 1 The running speed shall not be lower than 1 15% of the rated speed, otherwise it shall not exceed the standard. If the specified action is exceeded, it should be reset. 5.6.2 Distance from the bottom of tensioner to the pit: rated speed is more than 2m/s; The rated speed of 750 50mm is greater than 1m/s and less than 2m/s: 550 50 mm; The rated speed is less than1m/s: 400 50 mm.5.6.3 Adjust the fastener (anti-jump device) to make its pulling force not less than 150N and not more than 500N. 5.6.4 The clearance between the safety tongs wedge and the working face on the guide rail side shall meet the requirements and be symmetrical and even. The gap between the jaw and the front working surface of the guide rail should not be less than 3.5 mm. 5.6.5 The distance between the pressure plate of the speed limiter and the rope shall be 5 5- 10/0mm ... 5.7 The control cabinet and excitation cabinet shall be replaced with damaged and invalid parts; Replace the aged insulated conductors of the control circuit and the main circuit. 5.7. 1 Components and instruments are complete and in good condition, working normally, and there can be no jumper. 5.7.2 The wires shall be arranged neatly, with clear lines and firm ends. 5.7.3 The grounding resistance should not be greater than 4Ω. The insulation resistance of power supply circuit is not less than 0.5MΩ, and that of control circuit is not less than 0.25MΩ. 5.3 Layer selection system The layer selection system is disintegrated and cleaned, and the steel belt pulley and sheave bearings are seriously worn and should be replaced; When the damage degree reaches 1. 1. 1.2, the steel strip shall be replaced; Replace worn contacts, extended drive chains and aging followers; Replace the damaged parts of the electrical appliance layer selector. 5.8. 1 The transverse vertical center of the sheave to the steel strip shall not be greater than 3mm, and the vertical deviation shall not be greater than 0.5 mm..5.8.2 The distance between the bottom surface of the sheave and the pit shall be the same as 5.6.2, or specified by the manufacturer. 5.8.3 The grounding resistance should not be greater than 4Ω. 5.9 The control panel and display system shall be replaced by buttons, switches, floor display lights and call buttons of the control panel. 5.9. 1 The operating element is sensitive and reliable. 5.9.2 All kinds of displays are complete and normal. 5. 10 hall door and car door system correct the horizontal position of the car; If the door leaf is seriously deformed, it should be adjusted or replaced; Replace door guide shoes, hanging door wheels, bearings and irreparable door locks; Clean and adjust the safety contact plate. 5. 10. 1 The verticality error between the car door leaf and the door leaf of each floor hall shall not be greater than 1mm, and the clearance between the lower end and the sill shall be 1-6mm. 5. 10.2 The distance between the eccentric wheel at the lower end of the hanging door wheel and the lower end of the slideway is not more than 0.5mm. 5. 10.3 The gap between the door leaves is not more than 6mm. 5. 10.4 When the car door is opened, the door composed of hall door and hall door frame shall be flat, and its flatness shall not be greater than 5 mm. 5.10.5 The clamping force of safety contact plate shall not be greater than 5N, and the photoelectric device shall be reliable. 5. 10.6 The noise of the switch door shall not exceed 65dB. 5. 10.7 The limit force of the car door switch is 15-30N, and the threshold force switch is reliable. 5. 1 1 Disassemble the door opener, clean the door opener system and replace the badly worn parts. 5. 1 1. 1 The control resistance of the door opener shall meet the design requirements. 5. 1 1.2 belt tightness is appropriate. 5. 1 1.3 The average speed of opening and closing doors is 0.3m/s, the closing time is 3.0—3.5s, and the opening time is 2.5-3.0s. 5.12 guide shoes are disassembled and cleaned; Replace the boot lining and tired spring. 5. 12. 1 The clearance of each part of the spring slipper shall comply with the regulations of the manufacturer. 5. 12.2 The vehicle levelness shall not exceed11000. 5. 13 guide rail cleaning guide rail; Replace the severely worn guide rail; Find the deviated guide rail; Tighten the runner plate, connecting plate and bracket bolts. 5. 13. 1 Distance deviation between two guide rails: 0 ~+2mm for the car side guide rail and 0 ~+3mm for the counterweight side guide rail. 5. 13.2 The allowable step at the joint of guide rail should not be greater than 0.05mm；; If it exceeds 0.05mm, it shall be leveled, and the length of polished light at the joint of guide rail shall be 250-300 mm. 5. 13.3 The diagonal deviation between car and counterweight guide rail shall not be greater than 3mm. 5. 13.4 The verticality of the guide rail shall not be greater than 0.7mm every 5m. 5. 14 counterweight 5. 14. 1 should be locked with double nuts and cotter pins, and the counterweight locking device should be firm. 5. 14.2 The counterweight block and counterweight frame shall be reliable and firm. 5. 15 Safety devices Check and test the performance of each safety device. The missing parts should be filled, the inflexible parts should be replaced, and the position deviation should be corrected again. 5. 16 Control cables and well wiring should be replaced with aged and damaged wires and cables; Fasten the terminals of each box; Test the insulation resistance of junction box and cable. If the insulation does not meet the requirements, replace it. 5. 16. 1 The cable is firmly fixed. 5. 16.2 All-tin rinsing (it is forbidden to use hydrochloric acid and strong corrosive substances as flux). 5. 16.3 The grounding is reliable, and the grounding resistance is not more than 4Ω. 5. 17 buffering adjustment spring buffering; Remove and clean the hydraulic buffer, and replace the oil seal if it is seriously worn; Remove rust. 5. 17. 1 The verticality deviation of the plunger of the oil pressure buffer is not greater than 1 mm, and the distance between the collision plate of the car and the counterweight device and the top surface of the buffer is150-400 mm; The top surface of the spring bumper is 200-350 mm away from the collision plate of the car and the counterweight device. 5. 17.2 The difference between the center of the collision plate of the counterweight device and the center of the buffer is not more than 20mm. 5. 17.3 buffer levelness is not greater than lmm. 5. Commissioning of18 running performance: starting, braking, shifting, running and leveling. Test the voltage and current values when the elevator is running; Measuring the balance coefficient; Fill in the record. 5. 18. 1 The balance coefficient between the counterweight and the straightening box is 40%-50%, or as specified by the manufacturer. 5. 18.2 The accuracy of elevator floor should meet the requirements of various elevators. 5. 18.3 traction should be sufficient. It shall comply with the provisions in Appendix D.H. (1). Article 2 in GB7588. 5. 18.4 The elevator runs normally and stably. 5. 19 The embedded parts, supports, conduits, trunking, channel steel and I-beams of the elevator are rustproof with oil; Paint or paint the control cabinet, traction machine, floor selector, speed limiter, hall door, door frame and car in the elevator room; The buffer is coated with antirust paint. 5. 19. 1 The color of the painted part shall be harmonious, smooth and bright. 5. 19.2 All rotating parts in the machine room should be painted yellow with direction signs. When the elevator is running, there should be obvious floor signs in the machine room. 5.20 After civil construction, the holes and chiseled parts shall be repaired, and each hole shall have a waterproof platform. The civil engineering after overhaul should meet the requirements of the original structure.