GB 28265-2012Safeguard Specification of Amusement Rides (English PDF)

3.1 Safeguard

In safety functions, the guards or protection devices that protect people from existing

harm or imminent harm.

3.2 Electric devices

The devices that achieve specified safety functions through coordinating mechanical

devices, electronics and electrical components.

3.3 Mechanical devices

The devices that achieve specified safety functions through mechanical devices.

3.4 Fault

The status of a characteristic that can not perform a specified function.

3.5 Trigger threshold

The physical quantity to trigger the safeguard.

3.6 Display error

The value difference between measurement value and safeguard's display value.

3.7 Action error

When safeguard triggers, the value difference between its actual physical quantity and

trigger threshold.

4.1 Basic Functions

4.1.1 The safeguard shall be applicable to amusement rides' condition requirements;

when the physical quantities which act on safeguard are reaching to its trigger

threshold, the safeguard shall act as required.

4.2 Alarm function

4.2.1 The safeguard shall be equipped with automatic alarm function; when it fails, it

shall be able to alert sound or light alarm signal.

4.2.2 The alarm signal shall be triggered by safeguard's action; the sound alarm

signal shall has apparent difference with amusement rides' environmental noise. The

alarm sound shall pass the tests specified by 5.14; all sound level shall not be lower

than 75dB (A). The light alarm signal shall use red color; it shall be clearly visible within

the range of the operating personnel.

4.3 Safety requirements of mechanical devices

The mechanical devices shall meet the requirements of 7.4 ~ 7.7 in GB 8408-2008, in

which, the axis, the pin and the important welds that relate directly to personal safety,

shall pass the test specified by 5.2.1 and 6.3.

4.4 Safety and environmental suitability requirements of electric devices

4.4.1 The electric devices shall meet the requirements specified by GB 5226.1; and

the safeguard, which uses programmable devices, shall also meet the requirements

specified by GB/T 20438.2.

4.5 Error determination of safeguard

4.5.1 For safeguard with display function, in laboratory condition, with respect to the

action values, the display error shall not exceed ± 3%; when using whole amusement

rides to conduct the test, it shall not exceed ± 5%.

4.5.2 When testing under the laboratory condition, the action error of electric devices

shall not exceed ± 3%; the action error of mechanical devices shall not exceed ± 5%.

4.6 Flexible restraining devices

4.6.1 The safety belt (containing components such as lock) shall meet the

requirements in 7.6.7 of GB 8408-2008, and shall pass the test specified by 5.2.3.

4.6.2 The elastic ropes which protect personal safety directly, shall specify the

restriction of the breaking force, usage count and failure time; the elastic ropes for

bungee shall meet the requirements specified in Part 4 of GB/T 20051-2006 at the

same time, and shall be able to pass the tests specified by 5.2.4 and 5.3.3.

4.9 Emergency brake

The emergency brake shall be able to act quickly under emergency situations to

prevent amusement rides running to dangerous direction; it shall be adjustable, and

shall be able to pass the test specified by 5.4 and 5.5.

4.10 Cushioning devices

The cushioning devices shall be able to act quickly, under emergency situations, to

prevent amusement rides running to dangerous direction, and shall be able to pass

the test specified by 5.4.

5.1 General specifications

5.1.1 The tests shall be carried out in the laboratory conditions; it shall meet the

relevant regulations and standards. For safeguard which can not be tested

independently, use the whole amusement rides to conduct the field test.

5.2 Tensile strength test

5.2.1 Test Methods for tensile strength

Simulate actual working conditions; use test machine, at action point of force, to apply

rated tensile onto the specimen to conduct the test.

5.2.4 Tensile strength test for elastic rope

Simulate the actual working conditions; use testing machine, under 100mm/min ~

500mm/min tensile speed, apply loading at action point of force; stretch elastic rope

specimens to 2.5 times and 4 times of their original length respectively. WHEN the

specimen is stretched to 2.5 times of the length, its tensile load is greater than the

design load, AND WHEN it is stretched to 4 times of the length, the corresponding

tensile load is less than the maximum dynamic load design, THEN it is judged as

qualified.

5.3 Fatigue strength test

5.3.1 Fatigue test method

Simulate the actual working conditions; use fatigue test machine to apply rated load

repeatedly at action point of force of specimen.

5.4 Impact strength test

Simulate actual working conditions; use test machine or whole amusement rides to

conduct field test; conduct impact test by applying rated load at action point of force.

Repeat the test for 1000 times; after the completion of test, if safeguard does not fail,

then it is judged as qualified.

5.7 Limit devices test

Simulate the limit critical conditions; use test machine or whole amusement rides to

conduct field test; the limit device shall be able to achieve safety functions on time;

repeat the test for 1000 times; after the test is completed, if limit device device does

not fail, then it is judged as qualified.

5.8 Action error test

Simulate amusement rides' actual working conditions; use test machine or whole

amusement rides to conduct field test; set the trigger threshold of safeguard; for each

trigger threshold, apply the actual physical quantity that is required to trigger the

safeguard, so as to trigger the safeguard.

5.9 Environmental test for electric device

5.9.1 Vibration Test

According to the conditions specified in Table 1, conduct the test. During the test, the

safeguard is not in energized state.

5.9.3 Protection level test

The test methods and conformity assessment shall meet the corresponding

requirements specified by GB/T 2423.37 and GB/T 2423.38.During the test, the

safeguard is not in energized state. After this test, conduct the test specified in 5.8.

5.9.4 Temperature Test

5.9.4.1 The high temperature test methods is in accordance with the specification of

GB/T 2423.2.During the test, the safeguard is not in energized state. Test temperature

is 60°C, last for 16 h. After the recovery, complete test specified in 5.8 within 30 min.

5.10 Voltage fluctuation test

When it is under the AC power supply, apply 110% of rated voltage for 60 min AND 85%

of rated voltage for 10 min, respectively; when it is under the battery power supply,

apply 135% of rated voltage for 60 min AND 85% of rated voltage 10 min, respectively.

In the later stage of the test, conduct the test according to 5.8.

5.11 Power immunity test

On the power supply of electric device, superimpose a spike voltage that has the

following parameters.

5.12 Insulation resistance test

Measure the insulation resistance between power inlet of safeguard and metal part of

enclosure. The test method is according to GB 50150-2006; if the insulation resistance

value is not less than 1.0Mohm, then it is judged as qualified.

5.13 AC withstand voltage test

The test method is according to 23.0.2 in GB 50150-2006.Apply 1000V test voltage

between power inlet of safeguard and metal part of enclosure, the time is 1 min. If there

is no breakdown and flash-over at the test position, then it is judged as qualified.