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Professional Training Outline for Wet Spray Machine Boom Nozzle Operators
Release time:
2026-01-22
Source:
Author:
Summary:
The operation of the spray boom nozzle on wet-mix shotcrete machines is a critical step in concrete spraying construction. The standardization of its operation directly affects the quality of the project, construction efficiency, and operational safety. To train qualified operators, we have specially developed this systematic training outline, which aims to enable trainees to fully master the core theoretical knowledge and practical skills through rigorous, concise, and practical instruction.
I. Training Objectives
This training is designed to enable participants to operate the wet spray machine boom nozzle system safely, independently, and efficiently. Specific requirements include: a deep understanding of the equipment’s basic structure and operating principles; proficient mastery of safety operating procedures and emergency response protocols; the ability to precisely control the spray angle, distance, travel speed, and concrete flow rate to ensure a smooth and dense sprayed surface; and the capability to perform routine inspections and basic maintenance tasks on the equipment.
II. Core Theoretical Training Content
1. Equipment Awareness: Systematically study the overall structure of wet spray machines, with a particular focus on mastering the functions and interrelationships of the boom system, the nozzle assembly (including nozzles, seals, and rapid-setting agent addition devices), the hydraulic system, and the control unit.
2. Working principle: Understand the flow characteristics of concrete within the conveying pipeline, the mixing and atomization mechanisms of accelerators, and the hydraulic drive logic of each joint in the boom arm. Clarify the impact of operational parameters such as working pressure and flow rate on the spraying performance.
3. Material Knowledge: Understand the mix design characteristics of commonly used shotcrete, the requirements for slump, and the effects of different types and dosages of accelerators on setting time and early strength.
4. Safety Guidelines: Thoroughly study the safety instructions for construction sites, with particular emphasis on the safety zones around high-pressure piping systems, risk prevention measures within the boom’s swing radius, safety precautions to prevent nozzle blockages and pipe bursts, and personal protective equipment (PPE). PPE ) the correct wearing requirements.
III. Core Practical Skills Training Content
1. Pre-operation Inspection: Be proficient in the inspection procedures for each system of the equipment before startup, including hydraulic oil level, lubrication points, sealing integrity of conveying pipelines, nozzle wear condition, unobstructed flow in the setting accelerator pipeline, and the operational effectiveness of the emergency stop button.
2. Basic operational skills:
Boom Control: Practice smooth and precise control of boom lifting, lowering, extending, retracting, and rotating via a remote controller or the cab’s control panel, thereby developing spatial awareness and coordination.
Jetting Operation: Train to master the optimal jetting angle (typically with the nozzle perpendicular to or slightly tilted downward from the surface being sprayed) and the jetting distance (typically...). 0.8–1.2 meters), nozzle movement speed (to ensure uniform coverage), and trajectory (spiral-shaped or S The coordination of shapes.
Parameter Adjustment: Based on the concrete working conditions and the requirements of the spraying surface, dynamically fine-tune the pumping rate and air pressure in real time to achieve optimal spraying performance and prevent excessive rebound or concrete runoff.
3. Fault Identification and Emergency Handling: Simulation training on the rapid identification and initial handling of common faults such as pipeline blockages, abnormal pressure, and slurry leaks, as well as proficient mastery of emergency shutdown procedures.
4. Maintenance and Care: After completing practice exercises, thoroughly clean the nozzles and spray heads, inspect and replace wear-and-tear parts, and carry out the complete daily maintenance procedure for the equipment.
IV. Training Methods and Assessment
The training employs “theoretical lectures.” + Simulator operation + A progressive “hands-on training” approach. Theoretical courses are supplemented by numerous on-site case studies and video materials to enhance intuitive understanding. Under the close guidance of an instructor, trainees practice operating the equipment firsthand, gradually progressing from unloaded exercises to loaded spraying operations. The assessment consists of two parts: a theoretical written exam and a practical skills evaluation. The practical assessment places particular emphasis on the standardization, safety, proficiency, and responsiveness to unexpected situations in operational procedures. Only those who pass the assessment will be certified as qualified operators.
V. Summary
An excellent operator of wet spray machine boom nozzles is not merely a skilled equipment operator; rather, they are the key guardian of both construction quality and site safety. This outline, through systematic training, aims to solidify trainees’ theoretical foundation, enhance their hands-on skills and safety awareness, and ultimately equip them with the comprehensive capabilities needed to independently meet job requirements—thereby providing a reliable talent pool for efficient and high-quality concrete spraying operations.
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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
E-mail:19967177733@163.com
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