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Safety Inspection and Operating Procedures for Wet Spray Machine Boom Systems

Release time:

2026-02-20

Source:

Author:


Summary:

The boom system is the working mechanism that enables the wet spray machine to achieve precise spraying. Its structural integrity and stable operation are of paramount importance. This specification aims to clearly define the key points for daily safety inspections and safe operating guidelines for the boom system, thereby preventing safety risks.

I. Basic Inspection of the Boom Structure

Stability Check: The equipment must be parked on a solid, level surface, and all support legs must be fully extended and securely supported. Before the support legs are firmly stabilized, it is strictly prohibited to operate the boom for lifting or extending movements.

Visual inspection of the structure: Check the main steel structure of the boom for any visible cracks, deformations, or weld openings. Also, inspect all connection bolts to ensure they are neither loose nor missing.

Safety Signage Verification: Ensure that all safety warning signs (such as caution zones and no-climbing signs) affixed to the boom are clear and complete.

II. Special Inspection of Key Moving Components

Wire rope inspection (if applicable):
(1) Wire Breakage and Wear: Inspect the steel wire rope daily for any broken wires. If the number of broken wires within one lay length (approximately six times the rope diameter) exceeds three, this should be taken seriously. If the number of broken wires reaches or surpasses the standard specified value (e.g., 10% of the total number of wires), the rope must be replaced. Use a caliper to measure the diameter; if the wear exceeds 7% of the nominal diameter, the rope must be replaced.
(2) Lubrication and Deformation: Inspect the steel wire rope surface to ensure it is adequately coated with grease and free from severe rust. Also, check for any plastic deformations such as kinks or flattening.
(3) End-fixture securing: Check whether end-fixture devices such as rope clips and wedge sleeves are securely fastened and show no signs of slippage.

Hinge and Bearing Inspection: Inspect the wear condition of the hinge pins and bushings between each arm section. Verify that the slewing support operates smoothly without any unusual noises. Lubricate according to the specified requirements.

Hydraulic Cylinder Inspection: Inspect the surfaces of the rods of all lifting and telescopic cylinders for any severe scratches or corrosion. Also, check the cylinder hinge points and the connections of the oil inlet and outlet pipes for any oil leaks.

III. Safe Operating Procedures

Pre-job environmental confirmation: Before activating the boom, the operator must confirm that no personnel are present within the boom’s rotation and extension range and maintain a safe distance from surrounding obstacles (such as scaffolding and cables).

Principle of Smooth Operation: When operating the boom, movements should be slow and steady, avoiding sudden starts or stops to prevent impact loads.

Spraying posture: During spraying, the nozzle should be kept as perpendicular as possible to the surface being sprayed, and maintained at a suitable distance of 0.8 to 1.2 meters to minimize rebound and ensure compactness.

Special weather conditions such as strong winds: When wind speeds exceed the equipment’s specified limit (typically around Force 6 or 10.8 m/s), arm operations should be halted and the boom retracted to the traveling position to prevent instability.

Emergency Response: Be familiar with the locations of the emergency stop buttons on the remote control and the equipment. In case of any unusual shaking, abnormal noises, or risk of loss of control, immediately press the emergency stop button.

IV. Prohibited Items

Do not overload the boom or use it beyond the specified operating range.

The use of the boom for lifting, pulling, or other operations not specified in the design is prohibited.

Personnel are prohibited from moving or relocating the equipment when the boom is not fully retracted and locked.

It is prohibited to perform inspections or maintenance on the boom without taking locking measures to prevent its accidental movement.

Summary
The safety of the boom system hinges on daily meticulous inspections and strict adherence to operational guidelines. Operators must firmly establish a strong safety awareness, internalize these guidelines into their daily practices, and ensure that every extension and rotation is safe and fully controllable, thereby building a robust defense for construction safety.