Inspection of Vertical Transportation Equipment_3 ppt

If the screw machine is located on, or accessible from, the top of the car, proceedwith the inspection in accordance with the procedures previously described in this section.. Inspection

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2.9.2 In-Car Inspection

2.9.2.1 Drive If the screw machine is mounted on the car and accessible for inspection andmaintenance from an access panel in the side or rear car wall, check the access panel to verifythat it is normally kept closed and locked and that the key is available only to inspectors,

maintenance personnel and repair personnel Insure that the machine cannot be operated whenthe access panel is open If the screw machine is equipped with a safety nut below the drive nut,carefully measure the space (distance) between the drive nut and the safety nut Compare thisspace with the space when the drive nut and safety nut were originally installed by referring tothe Safety Nut Spacing Data Tag attached to the screw machine A reduction in this space is anindication of wear of the drive nut Any reduction of the separation space of more than onethirty-second (1/32) inch should be reported Examine any belts or chains in the screw machinedrive for proper tension, wear and damage; including cuts, breaks, or separation Check

tension devices, if provided, to verify that they are in proper adjustment to detect slack or brokenbelts or chains Check all machine fastening bolts to determine that none have become loose orare missing Visually inspect the electrical service connection to the motor to verify there is notevidence of chafing, damage, or looseness Inspect the screw column to verify that it is

lubricated in accordance with manufacturer's recommendations After temporarily making thecontact on the access panel inoperative so that the screw machine can be operated with the accesspanel open, operate the elevator car in each direction while observing the brake functions and therotation of the machine Promptly upon interruption of power to the drive machine, stop the car

2.9.2.2 Control Equipment If the controller is located on the car and accessible for inspectionand maintenance from an access panel in the side or rear car wall, proceed with the inspection asdescribed previously in this chapter

2.9.2.3 Hoistway Equipment If the particular design and installation permits the inspection ofall mechanical and electrical equipment from within the car, the contact for the access panelshould be made inoperative temporarily so that the car can be moved with the access panel open Start with the car at the top of the hoistway and move the car in the down direction in about two(2) foot increments, stopping to inspect all hoistway equipment at each location Included in themechanical and electrical equipment which should be inspected are: guide rails, guide rail

fastenings; screw column supports, mounting brackets and guides, traveling cable, etc

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The inspection should verify that all hoistway equipment is undamaged and functional and thatall fastenings are tight If the screw column is in tension, verify that the support fastenings at ornear the top of the hoistway are tight and there is no evidence of damage or distortion If thescrew column is in compression, verify that the support means at or near the bottom of thehoistway are intact and there is not evidence of damage or distortion Check screw columnguides or stabilizing supports to verify that they are intact and functional If the screw column ismade up of more than one section, special attention should be given to the joints to verify

that there is no indication of shifting or separation of the sections Utilize procedure previouslydescribed in this chapter for inspection of items common to screw column and traction elevators.observe extreme care when moving the car with the access panel open Be sure the contact onthe access panel is restored for normal operation and that the access panel is properly closed andlocked before leaving the car

2.9.3 Outside Of Hoistway Inspection

2.9.3.1 Control Equipment Control equipment may be located separate from the elevator Ifthis arrangement is used, then the equipment must be enclosed in a locked metal cabinet withaccess restricted Inspection procedures should be as previously described in this chapter

2.9.3.2 Manual Movement of a Stalled Car If the elevator is equipped with a device to permit aqualified person, from a position outside the elevator car, to manually move the car to a landing,check the operation as follows:

a Have the power-supply-line disconnecting means opened while the car is between landings

to simulate an unplanned power outage

b Operate the device manually and move the car to an adjacent landing

c Restore the device and the power-supply-line disconnecting means for manual operation.2.9.4 Top Of Car Inspection

2.9.4.1 Drive If the screw machine is located on, or accessible from, the top of the car, proceedwith the inspection in accordance with the procedures previously described in this section

2.9.4.2 Control Equipment Control equipment may be located on the car top Proceed with theinspection as previously described in this section

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2.9.4.3 Speed Governor, Governor Rope and Governor Rope Releasing Carrier If the elevator

is equipped with a speed governor which is most accessible from the top of the car, inspect thegovernor in accordance with the applicable portions of Item 104.6 of the A17.2 Manual Inspectthe governor rope releasing carrier, if the elevator is so equipped, in accordance with the

applicable portions of Item 103.15 and the governor rope in accordance with the applicableportions of 103.4

2.9.5 Inspection Of Machine Rooms And Machinery Space

In some applications, the drive system, control equipment and/or speed governor are located in

a specific machine room or machinery space Inspection procedures for such an arrangementshall follow the steps previously described in Section 2.5 "OVERHEAD MACHINERY SPACEAND MACHINE ROOM INSPECTION" and, for general requirements relating to this type ofarrangement, as previously described for traction elevator

2.9.6 Periodic Inspections And Tests

The following inspections and tests should be made on a periodic basis

2.9.6.1 Annual Inspections and Tests

2.9.6.1.1 Terminal Stopping Devices See Division 116 of the A17.2 Manual for inspection andtest of normal terminal stopping devices Note that final terminal stopping devices are not

required on screw column elevators having a rated speed of less than 100 fpm Mechanical stepsare allowed Where final terminal stopping devices are provided, test by adjusting the

device with the car operating at leveling speed

2.9.6.1.2 Governor and Safety Test Where governors and safeties are provided on screwcolumn elevators, they should be tested as outlined in Divisions 111 and 112 of A17.2

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2.9.6.1.3 Buffer Test Where oil buffers are provided on screw column elevators, they should

be tested as outlined in Division 114 of A17.2 There is no requirement to perform a test ofspring buffers

2.9.6.1.4 Test of Firefighter's Service Where the Firefighter's Service is provided on screwcolumn elevators, they should be tested as previously outlined for traction elevators in thischapter On Section 2.10 - "FIREFIGHTER'S SERVICE"

2.9.6.1.5 Test of Emergency Power Operation Where emergency power is provided for screwcolumn elevators, it should be tested as outlined in applicable portions of Division 117 of A17.2.2.9.6.1.6 Test of Closing Force of Door System Where screw column elevators are providedwith power operated doors, the closing force of the door system should be tested as outlined inapplicable portions of Division 119 of A17.2

2.9.6.2 Tests Performed Each Five Years

2.9.6.2.1 Oil Buffers Where oil buffers are provided on screw column elevators, they should betested as outlined in applicable portions of Division 115 of A17.2 There is no requirement toperform a test of spring buffers

2.9.6.2.2 Governor and Safety Test Where governors and safeties are provided on screw

column elevators, they should be tested as outlined by applicable portions of Division 113 ofA17.2

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CHAPTER 3HYDRAULIC ELEVATORS

3.1 INTRODUCTION

NOTE: Paragraphs identified with a vertical line in the left margin are inspections that should

be made by certified Vertical Transportation Equipment Inspectors only

3.1.1 Scope

The inspection procedure for hydraulic elevators included in this chapter is not only aninspection of all safety related functions, but is also an inspection to determine the condition ofthe equipment and identify areas that need improvement Proper maintenance is needed to keepthe elevator operating When preventive maintenance is lacking, shut downs will occur Part II

of the ANSI/ASME A17.2 Inspector's Manual for Elevators and Escalators addresses the safetyaspect of the inspection of hydraulic elevators In this chapter we will identify the specificDivision of Part II which relates directly to the inspection procedure being followed in thistext It is intended that each noted division should be reviewed as it is identified and suggestedprocedures followed The maintenance and performance considerations of the inspection will beaddressed in the following test See Figures 3-1 and 3-2, which show various elevator

arrangements with component names that will be used in this chapter

3.1.2 Performance Criteria

As was stated, the purpose of procedures as outlined in Section 2.1.2 are applicable

3.1.2.1 Elevator Speed (Hydraulic Elevators) Elevator operating speed is measured with atachometer while the elevator makes a full run through the hoistway with no load in the car With hydraulic elevators, it is necessary to make this reading from the top of the car by holdingthe tachometer on the guide rail The up direction operating speed should be maintained at alevel of plus or minus 5% of the rated speed (to be found on the cross head of the car) under anyload condition The down speed is much more difficult to obtain because the speed is directlyrelated to the weight in the car Usual adjustments are made such that contract speed is obtained

in the down direction with 50% load on the car The empty car down speed should be

maintainable at about 10% below contract speed and full load down speed should be

maintainable at about 10% above contract speed

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3.1.2.2 Door Opening Time Procedures as outlined in Section 2.1.2.1 are applicable.

3.1.2.3 Door Closing Time Procedures as outlined in Section 2.1.2.3 are applicable

3.1.2.4 Door Hold Open Time Procedures as outlined in Section 2.1.2.4 are applicable

3.1.2.5 Door Closing Force Procedures as outlined in Section 2.1.2.5 are applicable

3.1.2.6 Performance Times (floor to floor times) Procedures as outlined in Section 2.1.2.6 areapplicable A calculated reasonable standard time for various types of elevators are shown inTable 3-1

3.1.2.7 Acceleration, Deceleration, Floor Stopping And Noise Procedures as outlined in Section2.1.2.7 are applicable

3.2 INSIDE THE CAR INSPECTION

3.2.1 Scope

Division 201 of the A17.2 Manual covers the inspections made from inside hydraulic elevatorcars

3.2.2 Operating And Signalling Devices

Procedures as outlined in Section 2.2.2 are applicable

3.2.6 Freight Elevator Enclosures

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TABLE 3-1 HYDRAULIC ELEVATORS FLOOR-TO-FLOOR PERFORMANCE TIME SELECTION

Times in Seconds Tolerance - plus or minus 2 seconds

-

ADJUSTMENT

PER FOOT

OF TRAVEL

SPEED DOOR TYPE AND OPENING WIDTH[1] FROM 12'-0"

(F.P.M.) SIDE OPENING STANDARD[2]

36" 42" 48" 54" (SECONDS)

50 21.5 22.5 23.5 24.5 1.2

75 17.5 18.5 19.5 20.5 0.8

100 15.5 16.5 17.5 18.5 0.6

125 14.5 15.5 16.5 17.5 0.5

150 13.5 14.5 15.5 16.5 0.4

CENTER OPENING

50 19.5 20.0 20.5 21.0 1.2

75 15.5 16.0 16.5 17.0 0.8

100 13.5 14.0 14.5 15.0 0.6

125 12.5 13.0 13.5 14.0 0.5

150 11.5 12.0 12.5 13.0 0.4

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1 Values are based on 7'-0" to 7'-6" high doors Adjust values for 7'-6" to 8'-6" high doors, by adding the following factor:

1/2 second for widths up to 42"

1 second for widths over 42"

2 Values are based on 12'-0" floor-to-floor height Adjust using factors noted for variation from this standard

Find rated speed in the 1st column Select standard floor-to-floor performance time from box under correct door type (side opening or center opening) and clear door opening width Adjust this time by adding factor if doors are over 7'-6" high, and adding or subtracting appropriate amount per foot of travel over or under standard floor height of 12"-0"

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NOTE: All times are based on heavy duty, medium speed, door operating equipment andoptimum adjustment.

3.2.7 Firefighter's Service Instructions

Instructions as outlined in Section 2.2.7 are applicable

3.2.8 Performance

3.3 OUTSIDE THE CAR INSPECTION

3.3.1 Hoistway Entrance

Division 202 of the A17.2 Manual covers the inspections made from outside hydraulicelevator cars Items and procedures as outlined in Section 2.3.1 are applicable

3.3.2 Closing Force

Instructions as outlined in Section 2.3.2 are applicable

3.3.3 Access Switch Operation

Items and procedures as outlined in Section 2.3.3 are applicable

3.3.4 Emergency Key Access

Items and procedures as outlined in Section 2.3.4 are applicable

3.3.5 Operation And Signalling Devices

3.3.6 Firefighter's Service Instructions

Instructions as outlined in section 2.3.6 are applicable

Tiêu đề	Inspection of Vertical Transportation Equipment
Trường học	University of Transportation
Chuyên ngành	Vertical Transportation Equipment
Thể loại	Báo cáo
Năm xuất bản	2023
Thành phố	Hanoi

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