GB28755-2012

Safety rules for simple lifts

简易升降机安全规程

GB 28755-2012 é uma norma nacional chinesa obrigatória vigente: Safety rules for simple lifts. Setor: Máquinas. Foco: Segurança de produtos. Entrada em vigor: 1 de fev. de 2013.

A aplicabilidade depende do escopo do produto, da via de certificação, dos avisos da autoridade competente e das regras de transição. Solicite uma tradução ou verifique a fonte antes de usar este registro em uma decisão de conformidade.

Visão geral de conformidade

Esta visão geral está disponível por enquanto apenas em inglês.

Escopo e aplicabilidade

GB 28755-2012 applies to the design, manufacture, installation, alteration, maintenance, use, and inspection of simple lifts. This standard specifically covers traction drive, positive drive, pinion-and-rack, and direct-acting hydraulic simple lifts used exclusively for cargo transportation. It is strictly prohibited to use these lifts for carrying passengers. Other structural types of simple lifts may refer to this standard. The standard sets limits on rated capacity (up to 3000kg for most types), rated speed (max 0.3m/s), and lifting height (up to 20m for traction types).

Requisitos técnicos

The standard outlines comprehensive safety requirements across several domains. For buildings and structures, it specifies strict guidelines for well construction, including mechanical strength, fire resistance, and top/bottom space dimensions to ensure safe operation and maintenance access. Regarding metal structures, the standard details the requirements for the cage, mandating a rigid, enclosed design with specific dimensions, maximum effective area relative to rated capacity, and robust mechanical strength. It also covers counterweights, balancing weights, and guiding devices, ensuring structural integrity under dynamic and static loads. For main components, the standard regulates landing doors, requiring both electrical and mechanical interlocks to prevent operation when doors are open. It specifies criteria for driving devices, including electric and hydraulic systems, mandating reliable braking systems and specific safety factors for suspension ropes or chains. The standard also mandates various safety protection devices, such as parking protection devices, descending over-speed protection devices, and overload protection devices. Manufacturers must ensure these devices are integrated to prevent accidental movement, falling, or overloading. Electrical equipment must include proper protective measures against short circuits, phase loss, and insulation failures, adhering to specific safety contact standards.

Métodos de ensaio

GB 28755-2012 requires rigorous testing protocols, including daily checks and periodic inspections (at least monthly) to monitor structural integrity, component wear, and safety device functionality. Before initial use or after major repairs/accidents, a comprehensive load test must be conducted. This includes rated load tests, 125% static load tests, and 110% dynamic load tests. Visual inspections and no-load tests must precede these load tests to verify operational stability and safety device effectiveness. All tests must be documented with specific conditions, procedures, and signatures of qualified personnel.

Perguntas frequentes

What products are regulated under GB 28755-2012?

GB 28755-2012 regulates simple lifts designed for cargo transportation only, including traction drive, positive drive, pinion-and-rack, and direct-acting hydraulic types. These lifts must not be used for carrying passengers.

What are the key operational limits for simple lifts under this standard?

The standard limits the rated capacity to a maximum of 3000kg (1500kg for positive drive types), the rated speed to a maximum of 0.3m/s, and the lifting height to a maximum of 20m for traction types and 15m for others.

What are the mandatory safety devices required by GB 28755-2012?

Mandatory safety devices include parking protection devices, descending over-speed protection devices, overload protection devices, limit switches, and buffers. These devices must be installed to prevent uncontrolled movement, falling, or operation under overload conditions.

The summary above provides a high-level overview of GB 28755-2012. To ensure complete compliance for your products entering the Chinese market, a precise and professional translation of the full technical specifications is essential. Purchase our high-quality English translation of GB 28755-2012 today to access all detailed parameters, tables, and testing procedures.

Indicações de aplicabilidade

Tipo: Segurança
CCS: J80
ICS: 53.020.99
Órgão competente: State Administration for Market Regulation
Comitê técnico: State Administration for Market Regulation (Special Equipment)