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Safety Protection Specifications for High-Pressure Cleaning Nozzles on Wet Spray Vehicles
Release time:
2025-12-22
Source:
Author:
Summary:
I. Risk Analysis of High-Pressure Cleaning
High-pressure cleaning operations (typically at pressures ranging from 8 to 15 MPa) pose multiple safety hazards:
1. Water jet impact injury (water pressure of 10 MPa can penetrate human tissue)
2. High-pressure recoil causes equipment to lose control (reaction force > 200 N).
3. Risk of electrical system short circuit (IP protection rating must reach IP67)
II. Standards for Personal Protective Equipment
| Protective Area | Equipment Requirements | Technical Parameters |
| Face | Full-face shield | Impact resistance rating ANSI Z87.1 |
| Body | Waterproof and puncture-resistant suit | Water pressure resistance ≥ 20 MPa |
| Hands and Feet | Steel-toe Waterproof Boots | Slip Resistance Coefficient > 0.5 |
| Listening | Noise-canceling earplugs | NRR≥25dB |
III. Equipment Safety Protection Measures
1. Mechanical protection system: Install dual physical barriers (spacing ≥ 50 cm); equip with a recoil stabilizer (offset < 3°); and install a self-locking nozzle mechanism (automatic shut-off upon power failure).
2. Electrical protection design: Waterproof junction box (protection rating IP68); residual current device (RCD) with tripping current ≤ 30mA; emergency brake switch (response time < 0.3s).
3. Pressure control device: Three-stage pressure reduction system (fluctuation < ±0.5 MPa); automatic overpressure cut-off (threshold: 110% of working pressure); real-time digital pressure gauge (accuracy class 0.5).
4. Standardized Operating Procedures
1. Pre-job inspection: Confirm that all protective devices are intact; test the emergency stop function; check the water circuit for leaks (pressure-holding test).
2. During the cleaning process: Maintain a safe distance (≥3m); adopt a Z-shaped cleaning path; and limit each continuous operation to ≤30 minutes.
3. Post-operation procedures: Disassemble only after the pressure has been relieved to zero; turn off and lock the main power supply; take inventory of protective equipment.
V. Response to Special Operating Conditions
1. Cleaning in confined spaces: Implement forced ventilation (airflow rate ≥ 30 m³/min); add monitoring posts (with visual surveillance); use low-noise spray nozzles (<85 dB).
2. Work at heights: Use dual safety belts for secure attachment; perform weight-balancing calculations; prohibit work when wind speed exceeds 6 m/s.
3. Nighttime Operations: Lighting in the work area ≥ 100 lux; wear reflective markings; implement a two-person collaboration system.
VI. Emergency Response Plan
1. First aid for jet injury: Immediately flush the wound with low-pressure water; apply pressure to stop bleeding (do not use a tourniquet); and keep the injured person warm.
2. Handling equipment malfunction: Activate the emergency stop device; evacuate the hazardous area; report the equipment’s serial number.
3. Electrical Accident Response: Use an insulated rod to disconnect the power; prepare for cardiopulmonary resuscitation (CPR); secure and protect the accident scene.
VII. Maintenance and Care Requirements
| Project | Cycle | Standard |
| Seal Replacement | 200 h | No visible deformation |
| Pressure Verification | Weekly | Error < 3% |
| Shield Inspection | Per Shift | No Damage or Loosening |
By strictly enforcing safety standards, the accident rate associated with high-pressure cleaning can be reduced by more than 90%. It is crucial to remember: any improvement in efficiency must never come at the expense of safety.
RELATED INFORMATION
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Changsha Base:Hunan Zenxon Heavy Industry Technology Co., Ltd.
Address: Jinrong Tongxin International Industrial Park, Changsha High-tech Zone
Loudi Base:Hunan Haoda Heavy Industry Technology Co., Ltd.
Address: Loudi Avenue, Loudi High-tech Industrial Development Zone, Lianyuan City, Loudi City, Hunan Province
Telephone:400-186-0868
E-mail:3804246750@qq.com
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