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Summer pump maintenance and use
Summer is the peak of construction. The high temperature accompanied by rain, just good concrete conservation environment, contribute to the rapid rise of concrete strength, can directly promote the construction progress. Therefore, the strength of concrete pouring construction with the temperature reached a peak. However, for concrete pumping work, summer construction is indeed more difficult and dangerous. Taking this opportunity, in the maintenance and use of pumping equipment (including towed concrete pumps, truck-mounted concrete pumps and boom-mounted concrete pump trucks, as well as other concrete-pouring pumping construction equipment, hereinafter referred to as "pump trucks" Talk about pump truck construction in summer need to focus on some of the issues. Often we are accustomed to using common winter and summer oil for pump engines. Before the summer season, the air conditioning system of the truck cab will also be inspected and maintained. But in addition, there are some problems that are closely related to the working characteristics of the pump truck and different from the ordinary vehicle maintenance and use in the summer. The main concern is the three liquids and a fat, referred to as "three liquids and one fat." 1, the engine temperature control With the substantial progress in the industrial level, it has rarely been seen because of the engine itself (such as the engine cylinder gasket seal failure, commonly known as "tank liner") caused the engine "boil" problem emerged . In general, the common cause of overheating of the engine in summer is that the maintenance is not in place, such as the loss of engine coolant fluid, or the cooling efficiency caused by the attachment of the radiator in Spring. The solution to such problems is to ensure the quality and quantity of the engine coolant through maintenance and maintenance, to clean the surface of the radiator and to ensure the normal operation of the engine cooling system. However, compared with diesel engines of other vehicles, the pump transmitter has some operating characteristics that are not conducive to temperature control. For example: (1) The pump is usually operated in the field and in the sun and the ambient temperature is higher (2) The pump Pump operation to send the chassis intact, is not conducive to the air flow near the engine (3) pouring work interruption or concrete supply is not timely, causing the engine idling for a long time, but also not conducive to engine cooling. Then, in order to better control the temperature of the truck engine, here are some important and pertinent suggestions: (1) The engine coolant must use a regular antifreeze, the antifreeze must be in the expiration date and fluid volume must be sufficient. If you lose fluid because of failure, the amount of water added should not exceed 10% of the total amount of coolant. In the hot climate, the evaporation of water is particularly fast, and the pump during the summer peak construction work more often, so it is not recommended to use water as a pump truck engine coolant; (2) before the spring should be in the engine In front of the radiator to install a layer of gauze, to keep the radiator clean. In addition, pay attention to regular cleaning gauze. After the arrival of summer, the gauze should be disassembled to facilitate the air flow of the engine radiator. (3) To minimize the idle running time of the pump truck in the exposure environment by strengthening the communication to maximize the continuity of the concrete supply. 2, to prevent the working temperature of hydraulic oil is too high Summer ambient temperature is close to the normal operating temperature limit of the hydraulic system of the pump truck, so the pumping work will inevitably cause the temperature of the hydraulic oil to rise rapidly. Temperature increases will reduce the viscosity of hydraulic oil, resulting in poor lubrication. At the same time, the hydraulic system components tend to tighten under the action of thermal expansion and contraction, resulting in increased component wear. Therefore, the high temperature environment should be more strict control of hydraulic oil temperature. The main points of attention and measures are as follows: (1) 46 ℃ anti-wear hydraulic oil should be used in the ambient temperature of 35 ℃; 68 # anti-wear hydraulic oil should be used if the temperature exceeds 35 ℃ for a long time (2) must ensure that the regular replacement of hydraulic oil to ensure the quality and clean hydraulic oil (3) for the open hydraulic pumping unit, to ensure that the hydraulic oil radiator is working properly, if necessary, can be in the radiator or the main return pipe (4) For closed hydraulic system pumping unit, in addition to the radiator, if necessary, can slowly spray water in the main cylinder to assist in cooling heat (5) regardless of the working principle of the pump Send system, the hydraulic oil temperature exceeds the normal operating temperature, you must pause the pump to the system to cool down, over-temperature work for a long time will bring heavy losses to the hydraulic system. 3, the correct use of concrete piston coolant pumping unit washing room, there should be sufficient piston coolant. Piston coolant has three major functions: Clean and lubricate piston and delivery cylinder; Reduce hydraulic fluid temperature by conduction through main cylinder rod; Cool concrete piston to reduce interference between piston and delivery cylinder and reduce piston and delivery Wear between the cylinders. Then in the summer construction, the piston coolant must do the following two points: (1) Concrete piston coolant must be replaced frequently. When the piston coolant temperature exceeds 40 ℃, even if very clean should be completely replaced, to ensure that the piston can cool and shrink (2) high temperature environment, the concrete piston coolant coolant should be used to add water, rather than using hydraulic oil. This ensures that the cooling effect, but also will not be replaced due to frequent cooling and waste caused by pollution. 4, the correct use of grease High-pressure lithium-based grease injection is a pump truck work in contact with the concrete rotary parts of the main means of lubrication. The temperature rise will also reduce the viscosity of lithium-based grease, so should pay special attention to the following two aspects: (1) the temperature exceeds 30 ℃, you must use 0 # lithium grease, absolutely can not continue to use 00 # or 000 # Lithium grease. These non-compatible lithium-based grease should be well preserved, to be used in autumn and winter seasons (2) the viscosity of the grease viscosity decreased mobility, it should ensure that the use of grease rotating parts have a good seal to prevent the grease from the gap Rapid loss without lubrication. To sum up, "three liquid" includes engine coolant, hydraulic oil and piston coolant; "one grease" means grease. In addition to the regular summer maintenance work, strengthening the maintenance and management of "three liquids and one grease" will improve the intactness and utilization rate of pump trucks and reduce the operating costs.