The concrete pump truck is transformed on the chassis of the truck. It is equipped with sports and power transmission devices, pumping and mixing devices, distribution devices and other auxiliary devices on the chassis. However, not paying attention to maintenance and maintenance will shorten its life. This article provides you with some ways to maintain and maintain the concrete pump truck.
1 Strengthen the necessity of maintenance of boom pump truck
Unless it is used in large-scale special projects, commercial concrete boom pumps are generally not used in the same construction site and should not be used continuously for several days. It must retain sufficient time to strengthen the boom Maintenance of pump trucks. At the same time, when the boom-type pump truck is in the process of pouring commercial concrete, if the repair and maintenance are not in place, it will cause potential safety hazards. If a problem occurs, the impact will not only affect the construction progress, but those who enter the If the commercial concrete in the conveying cylinders, pipelines, and commercial concrete boom truck hoppers is not processed in a timely manner, it will inevitably have unimaginable serious consequences. Therefore, it is extremely important to strengthen the maintenance of important construction machinery and equipment such as commercial concrete boom pump trucks.
2 Main points for maintenance of piston commercial concrete boom pump truck
The piston type commercial concrete boom pump is the main component of the boom pump. There are three main wearing parts, which are the commercial concrete cylinder, the piston and the distribution valve.
2.1 Replacement of commercial concrete cylinders
When the inner wall of the commercial concrete cylinder is scratched or worn, it is usually taken out for maintenance, or it is turned around. In order to facilitate the maintenance and replacement of the commercial concrete cylinder, we can set a movable door cover at the bottom of the commercial concrete hopper. The opening and closing of this movable door cover can be completed by the movement of the oil cylinder. At the same time, the commercial concrete cylinder body can also come from this opening. Unplug. After adopting this new type of structure, it changed the situation of replacing the commercial concrete cylinder in the past, and it needs to be lifted out by the lifting equipment for maintenance, which greatly reduces the labor intensity.
2.2 Piston
Once the piston wears out, it will cause the seal of the inner wall of the commercial concrete cylinder and the piston to be greatly reduced, and there may even be a problem of slurry leakage. In addition, the pumping capacity of the piston commercial concrete boom pump truck is also It will be reduced due to piston wear. This is because the suction force of the commercial concrete entering the commercial concrete cylinder will decrease as the piston wears. If we find this situation, then it should be effectively repaired in time.
In order to facilitate the maintenance of the piston, we can use the hydraulic circuit to move left and right to place the piston exit on the maintenance frame. In addition, it often happens that during the piston replacement operation, the operator's finger is cut by the boom pump truck, or even the finger is cut, because the piston type concrete boom pump is not stopped (the engine is still running) . Therefore, when repairing and maintaining the piston, be sure to release the pressure accumulated on the hydraulic circuit first, and then stop the operation.
2.3 Lubrication system
The lubrication system is the main part of the maintenance of the piston type commercial concrete boom pump truck, especially for the timely supply of lubricating oil to the rotating parts, such as hoppers, commercial concrete pads and distribution valves. In addition, a special person should be arranged to regularly check the consumption of lubricants in important parts. Once the lubricants are found to be insufficient, they must be supplemented in time.
2.4 Distribution valve
As we all know, there are not many components of the distribution valve, only a few main components. If the distribution valve components are damaged, then in order to effectively improve the overall performance of the boom pump truck, the most reasonable and simplest way is to directly replace the distribution valve. At present, there are three major types of distribution valves, namely, tubular swing valve, rotary valve and gate valve. The application of rotary valve and gate valve is less, and the most widely used swing valve is the current mainstream. The swing valve is mainly composed of three major parts: S swing tube, cutting ring and glasses plate.
composition.
2.4.1 Cutting ring and glasses plate
In order to greatly simplify the maintenance operation, we generally adopt the structural type of installing the cutting ring and the eyeglass plate on the end of the S swing tube, and once it is worn, it will be replaced immediately. At the same time, special metals such as super-hard metal materials can also be used to repair and repair the worn areas, reducing the number of wear parts replacement and wear.
2.4.2 S swing tube valve
When maintaining the S swing tube valve, first of all, the two ends of the valve body should be inspected in detail. Because the S-swing tube valve will continue to swing and swing during the work, resulting in very serious wear. In order to extend the elbow life of the valve body and greatly reduce the number of replacements of the valve body, we can install the thin, movable end surfaces with high hardness and replaceability at both ends of the wear.
3 Main points for maintenance of squeeze commodity concrete boom pump truck
3.1 Pump body
The main components of the extruded commercial concrete boom pump truck are the vacuum system, the driving device, the pump body, the hopper, the extrusion hose, etc. Among them, the sealed pump body is the most important part of the squeeze type commercial concrete boom pump. The two planetary rollers are installed on the rotor frame inside the squeeze type commercial concrete boom pump. The rubber pads are lined with On the shell. Extruded rubber hose is a vulnerable part of the pump body of the squeeze type commercial concrete boom pump truck. Once the phenomenon of damage occurs in the process of pumping the commercial concrete, it will cause a very serious impact on the entire construction, thus strengthening the squeeze The maintenance of the hose is extremely important.
1) Replace the squeeze hose. The delivery pressure of the pump is closely related to the life of the squeeze hose, and they affect and restrict each other. If the pump's delivery pressure is low, the life of the squeeze hose will be longer; if the pump's delivery pressure is high, then the life of the squeeze hose will be shorter. If necessary, you should make preparations to replace the squeeze hose in time. In order to improve the replacement environment of the squeeze hoses of large commercial concrete boom pump trucks and expand the replacement work space, the method of horizontally rotating the oil cylinder and pushing the hopper box away can be used.
2) When replacing the squeeze hose, pay attention to check the wear of the rubber pad and rubber roller. If the wear is too severe, it can be replaced or adjusted by adjusting the bolt movement adjustment bracket. Focus on observing the rubber pad, and replace it in time if it wears or breaks.
3.2 Maintenance of the boom of the boom pump truck
In order to ensure the safety of the operation, the boom must be strictly maintained according to the requirements of the manufacturer, otherwise it may cause personal or equipment accidents. The general maintenance requirements are as follows: each shift checks whether the parts of the support and connecting parts are reliable and works normally; each shift checks whether the welds of the structural parts are cracked; each shift checks whether the movement gap between the parts needs to be adjusted, Whether parts wear causes failure; check the pre-tightening torque of the bolts on the slewing device every shift, and pre-tighten under the guidance of professionals according to the manufacturer's requirements. The new boom pump truck must be inspected after two weeks or 100 working hours, and every 500 hours (or 12 months) thereafter; periodically check the hydraulic motor and reduction gear box, and tighten the bolts as required; check Slewing bearing clearance, and adjust the clearance as required. Check the clearance of the slewing bearing every 500 working hours or every 12 months, whether the clearance is within the range required by the manufacturer; check whether the components of the hydraulic system are working properly every shift; check whether the electrical control system and components are normal every shift; Shift inspection of the conveying pipe on the boom, the wall thickness should meet the requirements, without quality defects; the maintenance of the chassis of the boom pump truck must be strictly in accordance with the maintenance requirements of the chassis manufacturer and the boom pump truck factory.
3.3 Continuously refine the inspection and maintenance system of the boom pump truck
If the inspection and maintenance system of the boom pump is not perfect, it will directly cause the hidden danger of the boom pump and the abnormal shutdown, which will increase the unstable factors. Therefore, while revising, refining, and perfecting the equipment maintenance and repair system, it is necessary to finely manage the boom pump truck, strengthen maintenance, and focus on control. Strengthen the patrol point system of boom pump trucks, so as to find and deal with hidden dangers in time, and minimize unplanned downtime. The cab, front curtain and other parts of the boom pump truck are clean and tidy, and no debris can be piled up or hung in disorder. Boom-type pump truck cab turning bracket and self-locking device, semi-trailer traction seat, traction pin, connecting screw, connecting device, etc. comply with safe operation standards.
4 Conclusion
Only with a comprehensive understanding of the maintenance and maintenance of the boom pump can the fault be more accurately determined, the correct maintenance and maintenance methods can be adopted, and the boom pump can be used normally.
