LBT-HW-171 Comprehensive Tester for Safety Nets and Safety Harnesses
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Description
Product Introduction
Manufactured in accordance with GB/T 6096-2020, GB 6095-2021, and GB 5725-2009, this equipment is primarily used for conducting overall dynamic load (seatbelt impact) tests, overall static load tests, as well as impact resistance and penetration performance tests on safety nets. It is widely employed by specialized labor protective equipment supervision and inspection stations, construction research institutes, construction engineering quality testing centers, power‑related departments, and other relevant organizations.
Host structure
1. The main frame is constructed from six 14#×5 galvanized square tubes, treated with anti-corrosion coating and subjected to professional finite-element analysis of load-bearing capacity, ensuring the overall safety and stability of the test rig. Customized solutions are also available to meet specific customer requirements.
2. The online testing rig features a scientifically sound and rational design, with dimensions configured as three standard workstations, enabling direct testing of safety nets in common widths such as 3 meters, 1.8 meters, and 1.5 meters.
3. Featuring a stacked, top‑and‑bottom configuration, the system requires only a 6.5 m × 3.5 m test space, making it the most compact solution for evaluating safety nets measuring 6 m in length and 3 m in width.
4. The test stand is available in two configurations: a flush‑with‑ground design and a pit‑type foundation; customers may select the option that best suits their requirements.
5. The test rig is scientifically and rationally designed, with the dynamic load test of the full-body harness, the static load test of the harness, the impact test of the safety net, and the penetration test of the safety net conducted independently and without mutual interference.
6. The static test mounting platform is equipped with symmetrical process holes, facilitating on-site installation.
Control System:
1. The overall control system employs a PLC–touchscreen architecture, with all relevant operations performed via the touchscreen.
2. The touch screen is from a well-known domestic brand, and the PLC is a Mitsubishi model with built-in high-capacity RAM; it features a TFT LCD display with a 4-wire precision resistive touchscreen, paired with a 400 MHz high-speed CPU for faster response and enhanced processing performance.
Safety Net Section
1. The steel ball and the through‑rod are engaged and released by an electrically driven suction‑and‑release system, operated via the touch screen.
2. The impact height of the safety net can be set via the touch screen and displayed in real time. When the set height is reached, lifting or lowering automatically stops.
3. The impact‑height ranging system is configured with a six‑point constant‑torque inductive ranging mechanism, delivering measurement accuracy that significantly surpasses that of laser‑ or ultrasonic‑based rangefinders.
4. The dedicated national‑standard pulley overcomes the drawbacks of other similar devices, such as the inability to lower the load when using a standalone release mechanism and the tendency of the wire rope to rotate.
Seatbelt section
1. The static test employs a high-ratio, two-stage geared reducer with a brake, meeting the standard requirements for static constant‑speed loading at a rate of less than 100 mm/min. The reducer is equipped with ultra‑low‑temperature gear oil to ensure reliable operation down to –35°C.
2. The static test employs automated closed-loop control, enabling automatic maintenance of the force–time profile.
3. The touch screen allows users to manually enter the set test force values (standard values are 15 kN, 4.5 kN, and 2.0 kN) and the holding time (corresponding durations are 300 s, 120 s, and 120 s). When the set time elapses, an automatic audible alarm is triggered.
4. The touch screen displays the test force value, hold-down countdown, test curve, test status, Beijing time, and other information.
Protection System:
1. The test stand is equipped with a vertical guard cage ladder to ensure operator safety.
2. Key components such as sensors, static reducers, and impact elevators shall be equipped with rain‑proof and other protective measures to extend the service life of the equipment.
3. The elevator is equipped with limit switches to ensure that, in the event of reaching the travel limits, the system automatically stops operating for safety protection.
4. The impact release mechanism is connected via a PUR helical spring cable, offering excellent resistance to UV degradation, superior high- and low-temperature performance, and outstanding wear resistance.
5. Equipped with a safety operating platform at the dynamic testing suspension point, ensuring operator safety.
6. Equip with dummy‑release safety straps to prevent unsafe belt breakage, mitigate the hazards posed by a falling dummy, and protect the dummy from damage.
Seatbelt Force System:
1. The dynamic force sensor utilizes a U.S.-made PCB ICP‑technology transducer, offering excellent stability, long service life, and high accuracy.
2. The static force sensor is from a well-known domestic brand.
3. The PLC is equipped with an integrated force‑value data processing system that can automatically perform data acquisition, analysis, and output display.
4. The touchscreen automatically displays and locks the maximum dynamic force value.
5. The sensitivity of the dynamic sensor can be calibrated via touchscreen input, facilitating data management.
6. Both the dynamic and static force sensors are weather‑resistant, ensuring reliable operation down to –35°C.
Technical Specifications:
| Parameter Category | Technical Specifications |
| Instrument power supply | AC 380V, 50Hz |
| Instrument dimensions | 6.5 m × 3.5 m × 12 m; sufficient clearance for crane operations and other activities must be provided to facilitate equipment installation. |
| Safety Net Indicator | |
| Impact height | 0–7.5 m, adjustable via the touch screen; standard impact heights: 7.0 m, 2.0 m, 1.8 m, 1.5 m. |
| Through height | Standard 1m height |
| Impact sample | Standard test dimensions: finished samples in three sizes—3 m × 6 m, 1.8 m × 6 m, and 1.5 m × 6 m. |
| Through-sample | Standard test size: cut samples measuring 1 m × 1 m |
| Impact steel ball | Weight: 100 ± 1 kg; diameter: 500 ± 10 mm; smooth surface; self‑balancing weight available. |
| Through rod | Weight: 5 ± 0.2 kg; diameter: 50 mm round bar; end faces are the minimum cross-section with sharp edges and corners; fillet radius less than R1. |
| Seatbelt indicator | |
| Dynamic force sensor | Measurement range: 0–20 kN; frequency response: not less than 5 kHz; accuracy: ±1.5% |
| Dynamic Data System | Sampling frequency: 20 kHz; sampling time: 38 ms; measurement lower limit: 1,000 N; resolution: 1 N. |
| Static force sensor | 0–30 kN, accuracy 0.5% |
| Static Data System | Sampling frequency: 5 kHz; real-time acquisition; lower detection limit: 300 N; accuracy: 0.01 kN. |
| Static stretching range | 0–5500 mm |
| Static stretching speed | Less than 100 mm/min |
| Static stretching duration | 0–999 seconds; settable via the touchscreen, with an automatic alarm notification when the preset time is reached. |
| Detection adaptation | In conjunction with test dummies, it can perform both dynamic and static safety tests, in compliance with the requirements of Clause 4 of GB/T 6096-2020. |
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