GB 24938-2010Low-speed goods vehicle -- Self-unloading system -- Safety requirements (English PDF)

3.1 General requirements

3.1.1 Design of low-speed trucks dump system, manufacturing should ensure safe operation. In accordance with the manufacturer product instructions normal operation and maintenance There should be no unreasonable risk when maintenance.

3.1.2 low-speed trucks dump system used by the component shall comply with the national standards, industry standards, granted in accordance with prescribed procedures Quasi products manufacturing drawings and technical documents.

3.2 Security guards

3.2.1 dump system should be set after lifting the state of repair of mechanical locking devices, rollover Tipper dump transport system should be set up state Locking means. Locking device should be able to secure locking.

3.2.2 The system should ensure that there is dump wagons automatic lifting phenomenon in the process of moving.

3.3 Lifting and fall

3.3.1 The system should enable the dump wagons steady rise, fall or stop at any position, there should be ran, collision and wiring.

3.3.2 at 10% overload condition, give rise to 20 °, the residence 5min, carriages from the lower amount of not more than 1 °.

3.3.3 Dump system should enable accurate return after lifting the car.

3.4 Hydraulic System

3.4.1 Hydraulic dump system pressure safety devices (pressure limiting device) should be installed.

3.4.2 hydraulic dump system 1.5 times (the rated working pressure <=15MPa) or 1.25 times (the rated working pressure > 15MPa) rated operating Under pressure to make, is not allowed within 3min oil leakage, cracking, swelling and partial disengagement joints and so on.

3.4.3 Dump hydraulic system piping should be reasonable layout, stable fixation, away from hot surfaces, moving parts, exhaust and electrical equipment, there should be no infiltration Drain, loose, loss and interference phenomena.

3.4.4 When necessary, should be high-pressure tubing hydraulic dump system piping protection, to ensure that when the pipeline rupture, without splashing into the body.

3.5 Operating mechanism

Operating mechanism and other components should not have interference, measures should be taken to prevent accidental start-control mechanism. The control mechanism should be flexible, accurate Accurate, reliable, and should not be displaced due to vibration.

Determining safety requirements and measures 4

4.1 General Requirements

Dump system carrying dangerous does not occur during the test according to the manufacturer product instructions normal operation and maintenance, it is determined the project qualified.

4.2 Security guards

4.2.1 Visually inspect the locking device is qualified.

4.2.2 dump truck driving at full load, in the three and three of the following roads at least 1h, observe whether the trunk automatic lift L phenomenon.

4.3 Lifting and fall

4.3.1 to 3.3.1, dump truck without a load, stopping on a flat, hard surface of the ground, steering system dump, visually check for eligibility.

4.3.2 dump truck at 10% overload state, stopping on a flat, hard ground surface, uniform load, mounted on the side of the wagon tailgate dumping direction Inclinometer, then wagons give rise to 20 °, the residence 5min, read and record the starting and ending point of view angle instrument, calculate the difference. Press dumping direction, each repeated three times, and three times the difference between the average of the trunk from the lower amount.

4.3.3 Dump visual system enables car lifting the return after the accuracy of eligibility.

4.4 Hydraulic System

4.4.1 to 3.4.1, a visual inspection pressure safety devices (pressure limiting device) is set.

4.4.2 hydraulic dump system pressure rises to 1.5 times (the rated working pressure <=15MPa) or 1.25 times (the rated working pressure After > 15MPa) rated working pressure, keeping 3min, to observe whether there is oil leakage, cracking, swelling and partial disengagement joints and so on.

4.4.3 to 3.4.3, a visual inspection is qualified.

4.4.4 to 3.4.4, a visual inspection is qualified.

4.5 Operating mechanism

Dump system operated steering mechanism, visually check for eligibility.