1. SCOPE AND OBJECTS OF APPLICATION
1.1. Scope of application
This safety engineering inspection procedure applies to the first, periodic, abnormal safety technical inspection of elevators without a machine room electric drive class I, II, III, IV classified according to TCVN 7628:2007 (hereinafter referred to as elevator) is under the state management authority of the Ministry of Labor, War Invalids and Social Affairs.
This procedure does not apply to reel lifts, mine lifts, stage lifts, ship lifts, exploratory or offshore platforms, construction hoists and other special lift. Not applicable to some special cases such as: in flammable and explosive environment, extreme climatic conditions, seismic conditions, dangerous goods transport, class V elevators are classified according to TCVN 7628:2007, equipment with an angle of inclination of the guide rail relative to the vertical exceeding 15o.
1.2. Subjects of application
– Organizations conducting technical inspection of occupational safety;
– Technical inspectors inspect occupational safety.
2. MANUAL DOCUMENTS
– QCVN 26:2016/BLDTBXH – National technical regulation on occupational safety for electric elevators without machine room;
– TCVN 6395:2008, Electric elevators – safety requirements for structure and installation
– TCVN 6904:2001, Electric lifts – Test methods – Safety requirements for construction and installation;
– TCVN 7628:2007 (ISO 4190), Elevator installation;
– TCVN 5867: 2009. Elevators, Cabins, counterweights and guide rails. Safety requirements;
– TCVN 9358: 2012 Installation of equipment grounding system for industrial works – General requirements;
– TCVN 9385:2012: Lightning protection for construction works – Guidelines for system design, inspection and maintenance.
In case the national technical regulations and national standards cited in this inspection procedure are supplemented, modified or replaced, the provisions of the latest document shall apply.
The technical inspection of safety of electric elevators without machine room may comply with other standards at the request of the user or manufacturer, provided that such standard must have technical safety criteria equal to or higher than those specified in the national standards referred to in this procedure.
3. TERMINOLOGY AND DEFINITIONS
This procedure uses the terms and definitions in the above referenced documents and some terms and definitions in this process are construed as follows:
3.1. Lifts without machine room:
Is an electric elevator that has a traction machine installed in the well.
3.2. First technical safety inspection:
It is an activity to assess the technical safety of elevators according to national technical regulations and safety technical standards after the elevator is installed and before it is put into use.
3.3. Periodic safety technical inspection:
It is an activity to assess the technical and safety status of elevators according to national technical regulations and safety technical standards upon the expiration of the previous inspection period.
3.4. Unusual safety technical inspection:
As an activity to assess the technical condition of elevator safety according to national technical regulations and safety technical standards when:
– After repairing, upgrading or renovating that affects the technical and safety status of the elevator;
– At the request of the establishment or the competent authority.
4. INSPECTION STEPS
During testing, the following steps must be followed:
- Check the elevator profile and history;
– External technical inspection;
– Technical test – no-load test;
– Forms of download test
– Test method;
- Processing test results.
Note: The next test steps are only conducted when the test results in the previous step are satisfactory. All inspection results of each step must be fully recorded in the field log according to the form specified in Appendix 01 and fully recorded at the inspection organization.
5. EQUIPMENT, TOOLS FOR INSPECTIONS
Equipment and tools for inspection must be inspected and calibrated according to regulations. Testing equipment and tools include:
– Tachometer;
– Distance measuring device
– Instruments and means of checking geometrical dimensions;
- Temperature measurement device;
– Light intensity measuring device;
– Insulation resistance measuring device;
– Ground resistance measuring device;
– Multimeter electrical measuring device;
- Ampere pliers;
- Automatic leveling survey (if needed)
6. INSPECTION CONDITION
6.1. The lift must be ready for inspection.
6.2. Technical records of the elevator must be complete.
6.3. Environmental factors, weather conditions do not affect the test results.
6.4. Occupational safety and health conditions must be met to operate the elevator.
7. PREPARATION OF ASSESSMENTS
7.1. Before conducting the elevator inspection, the inspection organization and the facility must coordinate and agree on the inspection plan, prepare the conditions for the inspection, and send people to participate and witness the inspection.
7.2. Check records, equipment history.
Based on the forms of inspection to check, consider the following records:
7.2.1. When testing for the first time:
7.2.1.1. Profile, profile of the elevator according to section 3.1QCVN 26:2016/BLDTBXH:
The general explanation must show:
+ Name and address of the manufacturer, model, code, year of manufacture, number of floors of operation, permissible load (number of people);
+ Main technical characteristics of the system such as: Control device, safety device, driver, safety factor and lifespan of rope, overload limiting device. Copy of above test certificate Samples of safety parts.
– Copies of certificates of other important parts (ropes, chains, explosion-proof devices, glass, etc.).
- Schematic drawing of the principle of operation.
– Installation drawing of the elevator's structural assemblies, cable wiring diagram, counterweight.
– The overall drawing of the elevator with the main dimensions and parameters, the cabin dimensions.
– Instructions for installation, operation, inspection, maintenance procedures, troubleshooting.
– All components of the elevator must have a certificate of quality and place of manufacture; Lifts must be clearly marked when they are shipped from the factory, and the permissible load (number of people) at the control panel in the cabin.
- Certificate of conformity issued by the designated organization according to regulations.
7.2.1.2. Installation profile:
- As-built drawings, technical acceptance records;
– The test results of grounding, insulation resistance.
7.2.2. During periodic inspection:
- Curriculum vitae and results of the previous inspection;
– Records on management, use, operation and maintenance; inspection and examination minutes (if any).
7.2.3. When checking abnormality:
- Renovation and repair design documents;
- Minutes of acceptance after renovation and repair;
- Minutes of inspection by authorities.
Evaluation: Satisfactory result when complete and meets the requirements in 7.2.1, 7.2.2, 7.2.3 of this procedure. If not, the establishment must take additional corrective action.
7.3. Fully prepare suitable inspection facilities to serve the inspection process.
7.4. Develop and agree on the implementation of safety measures with the establishment before inspection. Fully equipped with tools and personal protective equipment, ensuring safety during the inspection.
8. PERFORMANCE INSPECTION
8.1. External check
The external inspection includes the following tasks:
a/ Check the completeness and synchronism of the elevator – Check the completeness of the parts and assemblies.
– Check the specifications, the synchronization of the machine clusters in terms of technical criteria: speed, voltage, assembly size. Assessment according to article 3.2 TCVN 6904:2001.
b/ Check the accuracy between the manufacturer's and installer's profile against reality (in terms of parameters, technical specifications, trademarks).
c/ Check for defects and deformations of parts and assemblies (if any).
d/ Check the hanging beams that support the parts and machine assemblies.
e/ Check the location of the tractor assembly, a safe distance from the cabin
f/ Overspeed governor test: Requires operating conductor for test and recovery (or electrically operated for test and recovery), evaluated according to section 9.3.8- TCVN 6395:2008.
g/ Check equipment for rescue: Check the device to open the rescue brake manually or push the push button to bring the cabin to the stopping floor, check the standing position to open the manual rescue brake evaluated according to point b, Section 5.3.2.1 TCVN 6395: 2008
Evaluation: The results of the external inspection are considered satisfactory if during the inspection the elevator is fully synchronous, installed according to the design, no damage, defects, or phenomena are detected
8.2. Technical test- no-load test
8.2.1. Check the shaft
– Make sure that there are no other devices installed in the shaft.
- Check the cover of the shaft.
– Check the rescue doors, inspection doors (in terms of size, lock type, contact control opening and closing).
– Ventilation of the shaft: the cross-section of the ventilation hole is not less than 1% of the cross-sectional area of the shaft.
– Lighting of the shaft: check the brightness (>=50lux) and the distance between lights is not more than 7 m.
– Check the installation of upper travel limiters and their operation
– Check the arrangement of electrical panels, electrical switches, assessed according to section 11.4.2 – TCVN 6395: 2008.
– Check the electrical wiring from the main electrical panel to the electrical cabinet, from the electrical cabinet to the machine parts and evaluate according to the items from 11.5.1, 11.5.12 – TCVN 6395: 2008.
– Check the installation location of machine clusters, assess according to section 5.5.1.1- TCVN 6395:2008.
– Technical inspection of the cabin-counterweight cable car:
+ For round steel cable with diameter not less than 8mm, evaluate according to section 7.9 TCVN 6395-2008.
+ For other cables, check according to Section 2.4.2, Section 2.4.3 QCVN 26:2016/BLDTBXH and check according to the manufacturer's regulations.
– Check the cable of the overspeed governor evaluated according to section 9.3.6 TCVN 6395-2008.
8.2.2. Transmission mechanisms, electric brakes and tractors
– Check electric brake: technical condition of brake wheel, brake pad, brake spring and evaluate according to items 10.3.3.1, 10.3.3.2, 10.3.3.4 – TCVN 6395: 2008.
– Inspection of cable pulleys, cable orientation and their protection, assessed according to section 7.9.6.1-TCVN 6395:2008.
8.2.3. Check the cabin and the equipment in the cabin
a/ Check the clearance between 2 cabin doors, the gap between the door and the cabin frame, assessed according to article 7.5.4-TCVN 6395: 2008. For hinged doors, evaluate according to section 7.5.5 -TCVN 6395 : 2008.
b/ Check the technical condition and operation of the anti-jamming device, assessed according to section 7.5.10.2.3-TCVN 6395: 2008.
c/ Checking the safety electrical equipment controlling the opening and closing state of the cabin door is assessed according to section 7.5.11.1 TCVN 6395-2008
d/ Check the condition of ventilation and lighting in the cabin assessed according to section 7.7 TCVN 6395-2008.
– The total area of the upper and lower ventilation openings is not less than 1% of the useful area of the car.
– The cabin must have continuous lighting with an intensity of at least 50 lux. e/ Check the backup light source when the main light source loses power.
g/ Check that the horizontal safe distance between the car door sill and the landing door sill must not be more than 35 mm.
h/ Check the cascade call buttons.
8.2.4. Check on the top of the cabin and related equipment
a/ Measure the safe distance between the roof of the car and the lowest point of the ceiling by at least 1.0 + 0.035 v2(m). v : rated speed of the elevator ; unit m/s
b/ Check the cable fixings on both the cabin side and the counterweight side.
c/ Checking the hatch on the roof of the cabin and the operating status of the electrical safety contacts, controlling the opening and closing of the hatch assessed according to the items 7.6.1, 7.6.3.1 -:- 5 TCVN 6395-2008.
d/ Check the cabin roof railing – The height is not less than 0.70 m.
– The distance from the outside of the handrail to any part is not less than 0.10 m.
e/ Check the counterweight frame, the situation of mounting the counterweight plates in the frame, the fixing of the slabs in the frame.
g/ Checking the cabin guide rails and counterweights – Checking the fixing of the rails to the building.
– Check the distance between the rail clamps (refer to the installation documents).
– Check that the safe distance between the cabin and the counterweight, including the protruding parts of the two overhead parts, is not less than 0.05 m.
8.2.5. Check the landing doors
a/ Check the clearance between the two panels, between the panel and the door frame. This value is not more than 6mm (old scale can be up to 10mm).
b/ Checking the device to control the opening and closing of the landing door – Check the technical and operational status of the mechanical lock. – Check technical and operating status of electrical contacts.
c/ Check the landing door panels
- Check the display of landing indicators.
– Check the landing call buttons.
8.2.6. Check the bottom of the pit
a/ Check the pit
- Check the condition of pit
- Check the condition of groundwater seepage, lighting at the bottom of the pit
b/ Check the technical condition and mounting position of the main electrical panel at the bottom of the pit, including: electrical switches at the bottom of the pit, sockets.
– Check the installation and operating status of the lower travel limiters.
Emergency stop button test is evaluated according to Section 4.6.3.6 TCVN 6395: 2008
– Measure the depth of the pit and the vertical distance between the pit and the lowest part of the bottom of the cabin, assessed according to clause b, section 4.6.3.5- TCVN 6395: 2008.
– In special cases with low pit bottom depth (homelift), there must be a blocking device provided by the manufacturer to ensure a safe space for operation, maintenance and repair.
– In special cases with low depth of pit bottom (family ladder, homelift), the manufacturer will provide blocking devices, or specialized struts for use to ensure a safe distance for operation and maintenance, repair: conduct inspection of blocking devices or struts, ensure manufacturer specifications.
c/ Check damper – Check the damper stroke.
– Check position control electrical contacts (for energy absorbing dampers).
d/ Check the pulley, the counterweight pulling the overspeed governor cable
– The condition of the counterweight support rotation joint.
- Counterweight weight.
– Pulley protection.
– Electrical contact controls the stroke of the counterweight pulling the cable.
8.2.7. Try not downloading
For the elevator to operate, the cabin goes up and down 3 cycles. Observe the operation of the parts. If there is no abnormality, the assessment is satisfactory.
8.3. Load test modes- Test method
8.3.1. Dynamic load test at 100% rated load
Load evenly on the floor of the car, for the ladder to operate at rated speed, the following parameters are required to be checked:
a/ Measuring elevator motor current – Evaluation and comparison with equipment records.
b/ Measure the cabin speed
– Measure the cabin speed, assessed according to section 10.7.1-TCVN 6395: 2008.
c/ Measuring stopping accuracy at service floors, assessed according to section 8.7TCVN 6395:2008.
8.3.2 Dynamic load test at 125% of rated load
a/ Brake test: test method and evaluation according to section 4.2.1-TCVN 6904: 2001.
b/ Test the overspeed governor:
Test method according to section 4.2.2-TCVN 6904:2001.
c/ Test of car insurance brake: Test method and assessment according to section 4.2.3.1.2- TCVN 6904: 2001.
d/ Tensile test: Test and evaluation method according to section 4.2.4TCVN:69042001.
8.3.3. Check overload limit device: Check the operation and evaluate according to section 11.8.6-TCVN 6395:2008.
8.3.4. Test of counterweight insurance brake (if any): Test method according to section 4.2.3.2.2-TCVN: 6904-2001.
8.3.5. Try the rescue device:
– Test the automatic rescue kit (if any), perform and evaluate according to 4.2.6- TCVN 6904:2001.
– Manual rescue device test: check the operation of bringing the cabin to the nearest floor for rescue.
8.3.6. Trial of rescue alarm devices: Perform and evaluate according to section 4.2.7-TCVN 6904-2001.
8.3.7. Try elevator special programs (if available)
– Operation mode of the elevator when there is a problem: fire, earthquake.
– Priority running mode.
– Comparative assessment with manufacturer's records.
9. HANDLING OF SMALL INSPECTION RESULTS
9.1. Make an inspection record with full contents according to the form specified in Appendix 02 issued with this process.
9.2. Through the inspection record:
Participants in passing the mandatory inspection record must have at least the following members:
– The establishment representative or the person authorized by the establishment;
– The person appointed to participate in and witness the inspection;
- Inspectors carry out the inspection.
When the minutes are approved, the inspectors, witnesses to the inspection, the establishment's representative or the person authorized by the establishment shall both sign and stamp (if any) on the record. The inspection record is made in two (02) copies, each party is responsible for keeping 01 copy.
9.3. Write a summary of the inspection results in the elevator's resume (specify the name of the inspector, date of inspection).
9.4. Stamping inspection: When the elevator inspection results meet the technical safety requirements, the inspector affixes the inspection stamp to the equipment. The inspection stamp is affixed in an easy-to-observe position.
9.5. Issuance of a certificate of inspection results:
9.5.1. When the elevator has inspection results that meet the safety technical requirements, the inspection organization shall issue a certificate of inspection results for the elevator within 05 working days from the date of approval of the inspection report at the facility. .
9.5.2. When the elevator has inspection results that fail to meet the requirements, only the steps specified in Sections 9.1 and 9.2 shall be performed and only the inspection report shall be issued to the establishment, which must clearly state the reason for the failure of the elevator to meet the inspection requirements. determine and propose the establishment to remedy and the time limit for implementation of such recommendations; at the same time send the inspection record and notify the local labor State management agency where the elevator is installed and used.
10. INSPECTION PERIOD
10.1. Period of periodic inspection is 3 years. For elevators that have been used for more than 10 years, the period of periodic inspection is 02 years. For elevators that have been used for more than 20 years, the period of periodic inspection is 01 year.
10.2. Where the manufacturer specifies or the establishment requires a shorter inspection period, follow the manufacturer's regulations or requirements of the establishment.
10.3. When shortening the inspection period, the inspector must clearly state the reason in the inspection record.
10.4. When the inspection period is specified in the National Technical Regulations, the provisions of that Regulation shall be followed.
