The concrete pump truck is composed of five parts: boom, pumping, hydraulic pressure, support and electric control. It is a kind of equipment commonly used in concrete construction. So, what are the precautions about concrete pump trucks? How to maintain it?
1. Precautions for concrete pump truck
Application Security Considerations
1. The concrete delivery pump truck can only be used for the delivery of concrete. Any other use (such as lifting heavy objects) is dangerous.
2. The height and distance of the concrete pumped by the pump truck arm are strictly calculated and experimentally confirmed. Any subsequent connection of the hose at the end or extending the end hose by more than 3m is not allowed, and the resulting risk The operator himself
3. Unauthorized modifications to the pump truck that may affect safety are prohibited, including changing the safety pressure and running speed settings; changing to large-diameter conveying pipes or increasing the thickness of the conveying pipes, and changing control procedures or circuits. Changes to booms and outriggers, etc.
4. The operator of the pump truck must wear a safety helmet and abide by the safety regulations and safety regulations on the construction site
Safety precautions
1. The supporting ground must be level. Otherwise it is necessary to make a horizontal bearing surface. Cannot be supported on the cavity.
2. The pump truck must be supported on a solid ground. If the maximum pressure of the outrigger is greater than the allowable pressure on the ground, a supporting plate or auxiliary square beam must be used to increase the supporting surface area.
3. When the pump truck is supported near the pit or slope, sufficient safety distance should be kept
4. When supporting, it must be ensured that the whole machine is in a horizontal state, and the maximum horizontal angle of the front, back, left, and right of the whole machine does not exceed 3 degrees.
5. When unfolding or collapsing the outriggers, the range in which the outriggers rotate is a dangerous area, and people may be injured in the range
6. When supporting, all the outriggers must be telescopic and expanded to the specified position (the outrigger is aligned with the arrow on the ear, the front outrigger arm is aligned with the front outrigger arm arrow) otherwise there is a risk of tipping
7. The outriggers must be supported as required to operate the boom, and the outriggers must be retracted after placing the boom on the main support of the boom.
8 The factors that reduce the stability must immediately gather the boom, and after removing it, support it again according to the requirements. The factors that reduce the stability include
Changes in ground conditions caused by rain, snow or other water sources
The ground on one side of the support leg sinks
There is a leak in the outrigger cylinder
Safety precautions for outriggers
1. The boom can only be operated after confirming that the pump truck legs are properly supported. The boom must be operated in the order described in the operating regulations
2. Under thunderstorm or bad weather, the boom cannot be used. Boom can not be used in weather greater than 8 winds
3. When operating the boom, all of the boom should be in the operator's field of vision
4. Be careful of the risk of electric shock when working near high-voltage lines, and ensure a safe distance between the arm and the wires
5. Below the boom is a dangerous area, and concrete or other parts may fall and hurt people
6. No people are allowed to stand within the specified range of the end hose, and the end hose must not be guided when the pump truck starts pumping, it may swing to hurt people or spray concrete to cause accidents
The danger zone when starting the pump is the area around the end hose swinging. The area diameter is twice the length of the end hose. The maximum length of the end hose is 3m, and the diameter of the hazardous area is 6m.
7. Do not bend the end hose, the end hose cannot end into the concrete.
8. If the boom moves abnormally, immediately press the emergency stop button. Professionals should investigate the cause and eliminate it before continuing to use it.
Precautions for pumping and maintenance safety
1. When the pump truck is running, it is not allowed to open the hopper screen, water tank cover and other safety protection facilities, and it is not allowed to reach into the hopper, inside the water tank or grab other moving parts
2 When pumping, the concrete in the hopper must be above the position of the shaft of the footboard to prevent the spray of concrete caused by the inhalation of gas
3. When blocking the pipe, the pressure in the pipe must be released by the back pump before the pipe of the concrete delivery pump can be disassembled.
4. Maintenance and repair work can only be carried out when the pump truck is placed on a stable ground and it is ensured that no accidental movement occurs
5. Maintenance and repair work can only be carried out when the boom is folded or reliably supported and the engine is turned off and the outriggers are fixed
6. Before maintenance, the machine must be shut down and the pressure of the accumulator must be released.
7. If the hydraulic lock of the boom is opened without fixing the corresponding boom first, there is a danger of the boom falling down and hurting people
2. Maintenance method of concrete pump truck
1. The maintenance method of the concrete pump truck should be in accordance with the corresponding requirements and methods in the maintenance manual. During daily use, check the relevant items of the pump truck before and after use.
2. According to the corresponding requirements and methods in the operation and maintenance manual, refer to the lubrication table, and timely and adequately lubricate each part of the pump truck.
3. According to the corresponding requirements and methods in the operation and maintenance manual, select the specified type of hydraulic oil, and regularly replace the hydraulic system oil.
4. According to the maintenance methods and requirements of the concrete pump truck in the user manual, regularly check the water tank, concrete cylinder and concrete delivery pipe of the pumping system.
5. In accordance with the corresponding requirements and methods in the operation and maintenance manual, regularly check and adjust the torque of the fixing bolt of the rotating base of the boom.
6. In accordance with the maintenance method of the concrete pump truck in the user manual, regularly check and adjust the components of the boom, rotating base, legs, support structure, reducer and so on.
7. According to the corresponding requirements and methods in the maintenance manual, regularly check the working status of the hydraulic system and components, electrical system and components.
8. For cold weather, concrete pump truck maintenance methods should be adopted.
