Escalator maintenance contents and requirements

1. Understand the operation of escalators

Technical instructions: ① Ask Party A's supervisors, maintenance personnel and escalator drivers about the operation and fault of the escalator in this cycle; ② Consult the escalator emergency repair record book.

Inspection standards: (1) refer to the escalator breakdown and repair records; (2) Check maintenance records and work visas.

Establish necessary maintenance safety measures

Technical regulations: (1) before maintenance, must first set up safety railings and "escalator is not allowed to use" brand (up and down each one); (2) When necessary in the maintenance of the power supply can be cut off the main switch, and hang on the switch is under maintenance, prohibit the closing brand; If the maintenance of the ladder has been removed from the escalator, only allow to use the "maintenance box" to maintain the speed of the operation of the escalator point, ladder is not allowed to stand; (4) After maintenance, it is necessary to check the escalator without leaving any sundries and tools.

Inspection standards: ① requirements of railings and obstacles can be eye-catching and effectively prevent people from entering the site; ② Ensure that the escalator is not randomly started during maintenance; ③ Especially when there are people in the ladder road, the main power switch can be cut off, and the lock can be locked when necessary.

3 Prioritize emergency situations

Technical specifications: such as encountered due to failure and stop the ladder when the first troubleshooting.

Maintenance of ladder road system

Technical regulations: (1) remove 3 maintenance steps; ② Observe the cascade guide rail; Check the cascade chain and tension; ④ Check the steps one by one; (5) Check the ladder subsidence protection device; ⑥ Check the clearance between the two sides of the ladder and the baffle wheel.

Inspection standards: (1) stable operation, no abnormal noise; (2) When stepping in and out of the comb tooth plate, it can align with the center, and the depth of the comb tooth biting into the ladder groove meets the standard; (3) Check whether the distance of the pole meets the standard; (4) the distance between the anti-deviation wheel and the two sides of the ladder must be adjusted to the prescribed distance.

5 Handrail system maintenance

Technical specifications: (1) check the entrance and exit of the handrail; (2) Check whether the running speed of the handrail belt is synchronized with the ladder; (3) Check the surface and inside of the handrail belt for obvious scars and signs of friction; ④ the tension of the armrest belt; ⑤ Check the handrail with steering end; ⑥ Check the handrail pulley group and idler; Check handrail with friction wheel; ⑧ armrest with the cleaning work.

Inspection standard: (1) Observe whether the handrail is in the middle of the mouth guard when it is with and under operation; (2) Whether the difference between the running speed and the ladder running meets the standard of the enterprise; (3) Check the handrail with no steel wire exposure and scar sources, and exclude them; (4) whether the tension of the armrest belt meets the enterprise standard, does not meet the can be adjusted; ⑤ Pulley group and roller must run smoothly, smoothly and noiseless. Wear of the friction wheel.

6 Check the safety protection device

Technical regulations: ① handrail belt break belt safety switch; ② skirt safety switch; ③ Cascade sag protection switch; ④ cascade chain break chain switch; ⑤ overspeed protection switch; ⑥ Handrail into mouth protection switch; ⑦ comb tooth plate safety switch; ⑧ main drive chain broken chain protection switch; ⑨ Non-operation reverse protection switch; ⑩ Step jump switch; 2 wrong phase protector; (12) Thermal overload protector.

Inspection standards: (1) each safety switch must have excellent performance, sensitive, switch freely; ② The distance between the switch and the block meets the product requirements of the enterprise.

7. Maintain and adjust the transmission parts

Technical regulations: (1) check the running state of the reducer; (2) Maintenance of the brake, properly adjust the brake spring to ensure the brake torque; ③ sprocket inspection; (4) main drive chain inspection; The maintenance of the handrail transmission chain.

Inspection criteria: (1) whether the reducer is stable; ② Whether there is abnormal noise; ③ Check the wear degree of brake shoe belt; ④ Wear of active sprocket and passive wheel; ⑤ the tension of the active transmission chain; ⑥ Whether the bolt is complete, there is no off; Whether the armrest transmission chain tensioning meets the standards of each enterprise.

8. Cleaning of wainboards, inner and outer cover boards and apron boards (some units shall be handled by Party A)

Technical specifications: ① handrail support clean and clean; (2) the wall panel is bright and clean, and can be cleaned with dry cloth after spraying detergent; (3) the inner and outer cover joints are flat, there is no gap; ④ Apron board.

Inspection standards: (1) no garbage, no oil scale, no dust; (2) Upper and lower safety labels are intact; ③ There is no obvious step at the joint of the cover plate.

Check the control lighting system

(1) up and down key switch; Up and down emergency stop switch; (3) Maintenance box and up and down maintenance socket; Lighting control switch; ⑤ Maintenance lighting; ⑥ Handrail lighting and cascade gap lighting.

Inspection standards: ① the direction of the key switch is consistent with the direction of operation; The emergency stop switch is effective; The maintenance switch must be able to interlock with the key switch when it is used; (4) There is no damage to the lamp tube and bulb cover.

10. Cleaning of ladder road

Technical regulations: (1) in the removal of the 3 maintenance ladder neutral, do the cleaning of the guide rail; ② Use cotton cloth to wipe the main and auxiliary guide rail, if there is garbage or hard scale, use a shovel knife to scrape the shovel.

Inspection standards: (1) cascade main and auxiliary wheels on the track of the guide without noise, no beating; ② The guide rail is clean and free of oil scale.

11 steps of cleaning work and overall inspection

Technical specification: (1) the step pedal and circular arc plate without oil scale, dust; (2) the tooth groove of the cascade is intact; The slide thickness of the ladder meets the standard; (4) The main and auxiliary wheels of the cascade are complete, non-destructive and run smoothly.

Inspection standards: (1) the steps must be intact, clean and clean; (2) The outer diameter and bearing of the main and auxiliary wheels of the cascade must meet the standards of the enterprise and be noiseless; The wear degree of the cascade slider conforms to the standard.

12 Clean the upper and lower equipment rooms

Technical regulations: ① the upper and lower room shall not be placed with the escalator unrelated items; ② All machines and control boxes are clean and clean without fouling, water accumulation, oil accumulation and ash accumulation; The line is clear, the binding is firm, and there is no friction with the running and rotating parts.

Inspection standards: ① Upper and lower machine room, cover plate, front plate groove are clean without oil scale; (2) Line, no broken line, off line, peeling.

13 Lubricating oil supplement and replacement

Technical specifications: (1) lubricating oil level inspection of reducer; (2) Inspection of refueling device; (3) cascade chain, drive chain, handrail drive chain lubricating oil supplement; (4) lubrication between the cascade slider and apron board; ⑤ All rotating, moving parts, easy to rust parts of the oil injection work.

Inspection standards: (1) the requirements of the lubricating oil label is accurate, good oil quality, oil quantity is appropriate; ② The motor and reducer run without noise and abnormal heating; (3) All the pin shaft and ball bearing parts of the transmission chain are maintained with appropriate lubricating oil; (4) the cascade slider and apron board have no friction noise and butter lubrication; ⑤ Rotation, movable parts such as brake arm, pin shaft, screw parts are not rusty, dry and lack of oil phenomenon.

14 Finish finishing tasks

Technical specifications: ① install 3 maintenance steps; ② test run; ③ Cover the upper and lower front cover plate; Fill in the maintenance record and escalator maintenance periodic table; ⑤ Hand it over to Party A for use and handle the receipt formalities.

Inspection standards: (1) Deliver complete, clean, fully functional escalator; (2) The form is filled out clearly, the maintenance person, the recipient has a signature, the receipt is correct.

Attachment: ① The escalator must be maintained by specially trained and qualified professionals.

(2) Maintenance cycle is generally 1 to 2 weeks (can also be determined according to the actual situation).

(3) The main maintenance work is: a. Wipe machine parts, electrical components; B. Check the working condition of each mechanical and electrical part; C. Oil the parts to be lubricated.

④ Medium maintenance: generally half a year to 1 year, maintenance, cleaning and replacement of parts.

⑤ Large maintenance: the general cycle is 3 years once.

The content of large maintenance overhaul is the cleaning and adjustment of all parts and the replacement of damaged parts.