GB/T 7588.2-2020 Safety rules for the construction and installation of lifts—Part 2: Design rules, calculations, examinations and tests of lift components English
1 Scope
This part of GB/T 7588 specifies the design rules, calculations, examinations and tests of lift components.
It applies to the design of passenger lifts and goods passenger lifts.
2 Normative references
The following referenced documents are indispensable for the application of this standard. For dated references, only the edition cited applies. For undated reference, the latest edition of the referenced documents (including any amendments) applies.
GB/T 2423.5-2019 Environmental testing - Part 2: Test methods - Test Ea and guidance: Shock (IEC 60068-2-27：2008, IDT)
GB/T 2423.10-2019 Environmental testing - Part 2: Tests methods - Test Fc:Vibration(sinusoidal) (IEC 60068-2-6：2007, IDT)
GB/T 4207 Method for the determination of the proof and the comparative tracking indices of solid insulating materials (GB/T 4207-2012, IEC 60112:2009, IDT)
GB/T 7588.1-2020 Safety rules for the construction and installation of lifts——Part 1: Passenger and goods passenger lifts (ISO 8100-1:2019, MOD)
GB/T 8903 Steel wire ropes for lifts (GB/T 8903-2018, ISO 4344: 2004, MOD)
GB/T 14048.4 Low-voltage switchgear and controlgear—Part 4-1: Contactors and motor-starters—Electromechanical contactors and motor-starters (Including motor protector)(GB/T 14048.4-2010, IEC 60947-4-1: 2009Ed.3.0, MOD)
GB/T 14048.5 Low-voltage switchgear and controlgear - Part 5-1: Control circuit devices and switching element - Electromechanical control circuit devices (GB/T 14048.5-2017, IEC 60947-5-1: 2016, MOD)
GB/T 16935.1-2008 Insulation coordination for equipment within low-voltage systems - Part 1: Principles requirements and tests (IEC 606641:2007, IDT)
GB/T 24478-2009 Traction machine of electric lifts
GB/T 34560.2-2017 Structural steels―Part 2: Technical delivery conditions for structural steels for general purposes (ISO 630-2: 2011, MOD)
GB/T 35850.1-2018 Application of programmable electronic systems related to safety of lifts, escalators and moving walks Part 1: lifts (PESSRAL) (ISO 22201-1: 2017, MOD)
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
approved body
organization or manufacturer, operating an approved full quality assurance system to undertake testing of safety components
Note: The approved body in this document usually refers to the type examination organizations.
3.2
safety component
the components, provided to fulfill a safety function that shall be confirmed through the relevant type examination.
Note: For example, safety gear, overspeed governor and landing door lock.
3.3
type examination certificate
document issued by an approved body carrying out a type-examination in which it certifies that the product example under consideration complies with the provisions applicable to it.
4 List of significant hazards
This clause contains all the significant hazards, hazardous situations and events, as far as they are dealt with in this document, identified by risk assessment as significant for this type of machinery, and they require action to eliminate or reduce the risk (see Table 1).
5 Design rules, calculations, examinations and tests
5.1 General provisions for type examinations of safety components
5.1.1 Object and extent of the tests
The safety component/device is submitted to a test procedure to verify that insofar as construction and operation are concerned, it conforms to the requirements imposed by this document. It shall be checked, in particular, that the mechanical, electrical and electronic components of the device are properly rated and that, in the course of time, the device does not lose its effectiveness, particularly through wear or aging. If the safety component is needed to satisfy particular requirements (waterproof, dust proof or explosion proof construction), supplementary examinations and/or tests under appropriate criteria shall be made.
5.1.2 General provisions
5.1.2.1 For the purposes of this document, it is assumed that the laboratory undertakes both the testing and the certification as an approved body.
5.1.2.2 The application for type examination shall be made by the manufacturer of the component, or their authorized representative, and shall be addressed to an approved test laboratory.
5.1.2.3 The dispatch of samples for examination shall be made by agreement between the laboratory and the applicant.
5.1.2.4 The applicant may attend the tests.
5.1.2.5 If the laboratory entrusted with the complete examination of one of the components requiring the supply of a type examination certificate has no appropriate means available for certain tests or examinations, it may, under its responsibility, have these made by other laboratories with the agreement of the applicant.
5.1.2.6 Unless specified otherwise, the precision of the instruments shall allow measurements to be made within the following accuracy:
a) ±1 % for masses, forces, distances, speeds;
b) ±2 % for accelerations, retardations;
c) ±5 % for voltages, currents;
d) ±5℃ for temperatures;
e) Recording equipment shall be capable of detecting signals, which vary in time of 0.01s;
f) ±2.5 % for flow rate;
g) ±1 % for pressure, p, below 200 kPa;
h) ±5 % for pressure, p, above 200 kPa.
5.2 Type examination of landing and car door locking devices
5.2.1 General provisions
5.2.1.1 Field of application
These procedures are applicable to locking devices for landing and car doors. It is understood that each component taking part in the locking of doors and in the checking of the locking forms part of the locking device.
5.2.1.2 Documents to be submitted
5.2.1.2.1 Schematic arrangement drawing with description of operation
This drawing shall clearly show all the details relating to the operation and the safety of the locking device, including:
a) The operation of the device in normal service, showing the effective engagement of the locking elements and the point at which the electrical safety device operates;
b) The operation of the device for mechanical checking of the locking position if this device exists;
c) The control and operation of the emergency unlocking device;
d) The type (A.C. and/or D.C.), rated voltage and rated current.
5.2.1.2.2 Assembly drawing with key
This drawing shall show all parts important to the operation of the locking device, in particular those required to conform to the requirements of this document. A key shall indicate the list of the principal parts, the type of materials used, and the characteristics of the fixing elements.
5.2.1.3 Test samples
One door-locking device shall be submitted to the laboratory.
If the test is carried out on a prototype, it shall be repeated later on a production model.
If the test of the locking device is only possible when the device is mounted in the corresponding door, the device shall be mounted on a complete door in working order. However, the door dimensions may be reduced by comparison with a production model, on the condition that it does not falsify the test results.
5.2.2 Examination and tests
5.2.2.1 Examination of operation
This examination aims to verify that:
——The mechanical and electrical components of the locking device are operating correctly with respect to safety, in conformity with the requirements of this document and the standard calling for this locking device;
——The device is in conformity with the particulars provided in the application.
In particular, it shall be verified:
a) There is at least 7 mm engagement of the locking elements before the electric safety device operates;
b) It is not possible to operate the lift from positions normally accessible to persons with a door open or unlocked, after one single action not forming part of the normal operation.
5.2.2.2 Mechanical tests
5.2.2.2.1 General
These tests have the purpose of verifying the strength of the mechanical locking components and the electrical components.
The sample of the locking device in its normal operating position is controlled by the devices normally used to operate it.
The sample shall be lubricated in accordance with the requirements of the manufacturer of the locking device.
Foreword i
Introduction vi
1 Scope
2 Normative references
3 Terms and definitions
4 List of significant hazards
5 Design rules, calculations, examinations and tests
5.1 General provisions for type examinations of safety components
5.1.1 Object and extent of the tests
5.1.2 General provisions
5.2 Type examination of landing and car door locking devices
5.2.1 General provisions
5.2.2 Examination and tests
5.2.3 Test particular to certain types of locking devices
5.2.4 Type examination certificate
5.3 Type examination of safety gear
5.3.1 General provisions
5.3.2 Instantaneous safety gear
5.3.3 Progressive safety gear
5.3.4 Comments
5.3.5 Type examination certificate
5.4 Type examination of overspeed governors
5.4.1 General provisions
5.4.2 Check on the characteristics of the overspeed governor
5.4.3 Type examination certificate
5.5 Type examination of buffers
5.5.1 General provisions
5.5.2 Test samples
5.5.3 Test
5.5.4 Type examination certificate
5.6 Type examination of safety circuits containing electronic components and/or programmable electronic systems in safety-related applications for lifts (PESSRAL)
5.6.1 General provisions
5.6.2 Test samples
5.6.3 Tests
5.6.4 Type examination certificate
5.7 Type examination of ascending car overspeed protection means
5.7.1 General
5.7.2 Statement and test sample
5.7.3 Test
5.7.4 Modification to the adjustments
5.7.5 Test report
5.7.6 Type examination certificate
5.8 Type examination of unintended car movement protection means
5.8.1 General
5.8.2 Statement and test sample
5.8.3 Test
5.8.4 Modification to the adjustments
5.8.5 Test report
5.8.6 Type examination certificate
5.9 Type examination of rupture valve and one-way restrictor
5.9.1 General provisions
5.9.2 General
5.9.3 Samples to be submitted
5.9.4 Test
5.9.5 Test procedure
5.9.6 Interpretation of the tests
5.9.7 Type examination certificate
5.10 Guide rails calculation
5.10.1 Range of calculation
5.10.2 Bending
5.10.3 Buckling
5.10.4 Combination of bending and compression or tension or buckling stresses
5.10.5 Flange bending
5.10.6 Deflections
5.11 Evaluation of traction
5.11.1 General
5.11.2 Traction calculation
5.11.3 Formulae for a general case
5.12 Evaluation of safety factor on suspension ropes for electric lifts
5.12.1 General
5.12.2 Equivalent number, Nequiv, of pulleys
5.12.3 Safety factor
5.13 Calculations of rams, cylinder, rigid pipes and fittings
5.13.1 Calculation against over pressure
5.13.2 Calculations of the jacks against buckling
5.14 Pendulum shock tests
5.14.1 General
5.14.2 Test rig
5.14.3 Tests
5.14.4 Interpretation of the results
5.14.5 Test report
5.15 Electronic components - Failure exclusion
5.16 Design rules of programmable electronic system (PESSRAL)
Annex A (Informative) Model form of type examination certificate
Annex B (Normative) Programmable electronic system in safety related applications for lifts (PESSRAL)
B.1 Common measures
B.2 Specific measures
B.3 Description of possible measures to failure control
Annex C (Informative) Example for calculation of guide rails
C.1 General
C.2 Calculation of lift guide rail with safety gear
C.2.1 Safety gear operation
C.2.2 Normal operation, running
C.2.3 Normal operation - Loading (see Figure C.4)
Annex D (Informative) Calculation of traction - Example
D.1 General
D.2 Car loading condition
D.3 Emergency braking condition
D.4 Counterweight stalled condition
Annex E (Informative) Equivalent number of pulleys, Nequiv - Example
E.1 Example
E.2 Example
E.3 Example
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