The concrete pump truck consists of boom, pumping, hydraulic, supporting and electric control. The electrical control system of concrete pump truck
The concrete pump truck consists of boom, pumping, hydraulic, supporting and electric control. The electrical control system of concrete pump truck mainly has five control modes: mechanical, hydraulic, electromechanical and electrical control, programmable controller and logic circuit control. Besides the electric control system, the concrete pump truck is also equipped with a manual control system, which is also a part of the control system. ? Classification? It consists of boom, pumping, hydraulic pressure, support and electrical control. Efficiency? Operating system and efficiency of concrete pump truck: The electrical control system of concrete pump truck mainly has five control modes: mechanical, hydraulic, electromechanical and electrical control, programmable controller and logic circuit control. Besides the electric control system, the concrete pump truck is also equipped with a manual control system, which is also a part of the control system. If mechanical control is adopted, there are generally two ways: lever control mechanism and flexible shaft control mechanism. If we compare them, it is not difficult to find that the flexible shaft control mechanism has the advantages of flexible arrangement, high transmission efficiency, few transition joints, short idle stroke and convenient stroke adjustment, so the control system of concrete pump truck mainly chooses the flexible shaft control mechanism. According to the actual needs, the pump truck control system should realize stepless speed regulation, and the locking mechanism that can stop the joystick at any position is the key device to realize stepless speed regulation, generally, disc springs or spring pieces can be selected. In order to facilitate the operation, the control handle is designed and installed in a convenient position, such as the Putzmeister BSF36.09Z pump truck, and the control handle for controlling the engine speed is installed on the side of the ladder, which is very convenient to operate. The control system of concrete pump truck is mainly used to control the flow of main hydraulic pump and engine speed, thus changing the concrete displacement of pump truck. If hydraulic control is adopted, the hydraulic driving force can be obtained directly from the pumping system of the pump truck and controlled by manual hydraulic valve. It is closely related to the efficiency of concrete. At the same time, attention should be paid to the details of operating procedures in the operation process, and faults should be found and eliminated in time to improve the working efficiency of the pump. There are two methods for pipeline cleaning: water washing and air washing. Whether it is water washing or gas washing, the valve box and hopper should be cleaned. When washing with water, put the cement bag and cleaning ball soaked in water into the cleaned conical tube successively, connect the conical tube and pipeline, close the discharge door, and then fill the hopper with water and keep the water source unchanged. Pump water until the cleaning ball appears from the front end of the delivery pipe. Air washing, that is, compressed air blowing, is to first put the cleaning ball soaked in water into the air washing joint, then connect the first straight pipe connected with the reducing pipe, and connect the safety cover at the end of the pipe with the nozzle of the safety cover facing down. Control the compressed air pressure not to exceed 0.8MPa, and slowly open the air valve. Only when the concrete can flow out smoothly can the air valve be opened. ? ? From June 5438 to February 2008, Zoomlion acquired Italian CIFA to become the world's largest concrete equipment manufacturer and the strongest scientific research unit in China * * * China Construction Machinery Research Institute * *? The longest pump truck in the world is the 10 1 meter long arm pump truck produced by Zoomlion in Hunan, China, and has been successfully put into use. ? The pumping displacement is 200m/h***262yd/h***, and it is equipped with a large-diameter conveying cylinder, which has good material suction efficiency, less reversing times, and prolongs the life of wearing parts; ? Computer energy-saving control, automatic power matching, average energy saving 20%; ? Integrated automatic high-low switching, concrete piston automatic return, GPS and many other advanced technologies. ? Swing forward multi-stage telescopic legs and unilateral support, suitable for narrow site construction; ? Boom damping technology prolongs the service life of the boom and improves the working efficiency of the end hose. ? Record history? In the late 1960s, Putzmeister introduced the 16m boom pump truck; 1986, the world's longest arm pump truck of 62 meters developed by it was born. Calculated, it took the Germans nearly 20 years to raise the height of the boom by nearly 40 meters. Once again, this record has been rearranged, and it has been waiting for 20 years. This time, the protagonist became a China enterprise. ? In 2007, Sany Heavy Industry took the lead in launching a 66m boom pump truck in the industry, surpassing Putzmeister in one fell swoop and becoming the world's longest boom pump truck manufacturer. At that time, Sany 66m boom pump truck also won the Guinness World Record for the longest boom pump truck in the world. It is worth mentioning that this is the first Guinness Book of Records for the construction machinery industry in China. At that time, there was a saying circulating in the field of concrete pump truck: every time the boom length of concrete pump truck increases by one meter, it is difficult to go to heaven. However, a series of facts later proved that it is not difficult for China construction machinery enterprises to "go to heaven". ? In 2009, Sany rearranged its own records, and the boom length of the pump truck increased to 72 meters. This pump truck has created the world's first arm length, and the world's first and second world records for concrete transportation by pump truck. It is particularly noteworthy that this 72m pump truck was successfully delivered to customers after it was put on the market, becoming the longest boom pump truck in actual construction so far. ? 20 1 1 year, the 86m pump truck independently developed by Sany Heavy Industry rolled off the production line smoothly, setting a new world record again. In just two years, it has achieved a leap from 72 meters to 86 meters. At that time, Sany Heavy Industry's 86-meter pump truck achieved the three best in the world-the longest boom, the largest number of boom sections and the largest pumping displacement. In just a few years, Sany achieved the "triple jump" of the world record for the boom height of pump trucks. ? 20 1 1 Almost at the same time as Sany Heavy Industry's 86m boom pump truck, Zoomlion's 80m boom pump truck went offline. Different from Sany, the 80m carbon fiber boom pump truck independently developed by Zoomlion integrates the latest European technology of CIFA, and maintains many world records, such as the longest boom pump truck and the longest carbon fiber boom pump truck based on the general chassis, and has also been certified by Guinness World Records. ? 20 12 On September 28th, at the 20th anniversary celebration of Zoomlion, Zoomlion launched a number of products that were "the best in China or the world", among which the most dazzling star product was 10 1m, the world's longest-arm pump truck. Because Zoomlion not only created the Guinness Book of Records again, but even more surprisingly, Zoomlion improved the record by15m. [ 1] ? 20 12, 1 1 year1October, the 3186m pump truck was built in Shanghai, becoming the longest-arm pump truck available for field construction in the world. The 86m pump truck still holds the world record of horizontal pumping distance and pumping displacement of 240m3/h for the 82m pump truck? In 20 13, Sany combined Putzmeister's 55-year scientific and technological achievements and core technologies to create the world's first mobile mortar master, bringing an unprecedented "industrial revolution" to the building mortar construction industry. ? In 20 13, Sany Heavy Industry's "Technology and Application of Super-long Boom of Concrete Pump Truck" won the second prize of National Technology Invention Award in 20 12. ? Manufacturing enterprise? Sany Heavy Industry was established in 1994. Since its establishment, the company has grown at an average annual rate of over 50%. At present, it has developed into the largest construction machinery manufacturer in China, the fifth in the world and the largest in the world. ? On July 3, 2003, Sany Heavy Industry was listed on Shanghai A-share * * with the stock code of 600031* *. On June 30, 2005, Sany Heavy Industry became the first enterprise to successfully carry out the share-trading reform and realize full circulation, which was recorded in the history of China capital market. 20 1 1 In July, Sany Heavy Industry entered the FT Fortune 500 with a market value of US$ 215.84 million, becoming the only construction machinery enterprise in China. In 20 12, Sany Heavy Industry acquired Putzmeister, Germany, the first brand of concrete machinery in the world, which changed the competition pattern of the industry. ? In 2006, Sany Heavy Industry Project "Research, Development and Application of Key Technologies of Concrete Pumping" won the second prize of National Science and Technology Progress Award; 20 1 1 Sany heavy industry technology innovation platform won the second prize of national science and technology progress 2010; In 20 13, Sany Heavy Industry's "Technology and Application of Super-long Boom of Concrete Pump Truck" won the second prize of National Technology Invention Award in 20 12. The National Technological Invention Award is the highest honor of the National Technological Invention Award won by the construction machinery industry so far, and Sany Heavy Industry has also become the only enterprise in the construction machinery industry that has won the highest national award for three times. ? Precautions? What are the precautions for application security? 1 concrete pump truck can only be used to transport concrete, and any other use * * * such as lifting heavy objects * * * is dangerous. ? The height and distance of concrete pumped by the boom of pump truck have been strictly calculated and verified by experiments. It is not allowed to connect the pipeline behind the end hose or lengthen the end hose by more than 3m, and the risks arising therefrom shall be borne by the operator? 3 It is forbidden to modify the pump truck without authorization, which may affect the safety, including changing the safety pressure and setting the execution speed; Change the control program or circuit by using a large diameter delivery pipe or increasing the wall thickness of the delivery pipe. Changes in suspenders and legs, etc. Operators of pump trucks must wear safety helmets and observe the safety regulations and safety regulations at the site? Support safety precautions? The supporting ground of 1 must be horizontal. Otherwise, it is necessary to make a horizontal bearing surface. Can't support on the cavity. ? The pump truck must be supported on a solid ground. If the maximum pressure of the leg is greater than the allowable pressure on the ground, it is necessary to use supporting plates or auxiliary square timber to increase the supporting surface area. ? 3 when the pump truck is supported near the pit and slope, sufficient safe spacing should be left? 4 when supporting, ensure that the whole machine is in a horizontal state, and the maximum horizontal deviation angle of the whole machine is not more than 3 degrees. ? When unfolding or folding the legs, the rotation range of the legs is a dangerous area, and people may be caught in this range? 6 When supporting, all legs must be extended to the specified position * * * Legs should be aligned with the arrow on the lug, and the front leg arm should be aligned with the arrow on the front leg extension arm * * * Otherwise, there is a danger of overturning? You must support your legs as required to operate the boom, and you must fold the boom and put it on the main support of the boom to balance your legs? 8 After the factors that reduce stability are eliminated, they must be folded up immediately and supported as required. Factors that reduce stability include? Changes in ground conditions caused by rain, snow water or other water sources? The ground on one side of the support leg sinks? Is there any leakage in the leg cylinder? Safety precautions for legs? 1 The boom can only be operated after the legs of the pump truck are properly supported. The boom must be operated in the order specified in the operating instructions. In the case of thunderstorm or bad weather, the derrick can't be used. Derrick can't be used in weather with wind force greater than 8? 3 When operating the boom, all the booms should be within the operator's field of vision? Be careful of the danger of electric shock when working near high-voltage lines, and ensure the safe distance between the boom and the wires? Under the derrick is a dangerous area, and concrete or other parts may fall and hurt people? 6. No one is allowed to stand within the specified range of the end hose, and the pump truck is not allowed to guide the end hose when pumping, which may cause personal injury or concrete spraying? The dangerous area when starting the pump is the surrounding area where the end hose swings. The diameter of this area is twice the length of the end hose. The maximum length of the end hose is 3m, and the diameter of the dangerous area is 6m. 7 Don't bend the end hose. The end hose can't extend into the concrete. ? 8 If the boom moves abnormally, press the emergency stop button immediately. Professionals should find out the reason and eliminate it before continuing to use it. ? Safety precautions for pumping and maintenance? 1 When the pump truck is driving, it is forbidden to open the safety protection facilities such as the hopper filter screen and the cover plate of the water tank, and it is forbidden to reach into the hopper and water tank or grasp other moving parts by hand? When pumping, ensure that the concrete in the hopper is above the position of the bottom plate axis to prevent concrete spraying caused by inhaled gas? 3 when blocking the pipe, the pump must be reversed, and after releasing the pressure in the pipe, the concrete delivery pump pipe can be removed. ? Maintenance and repair can only be carried out if the pump truck is placed on a stable ground and ensured not to move accidentally? Maintenance and repair can only be carried out when the boom is folded or reliably supported, the engine is turned off and the legs are fixed? 6 Before maintenance, stop the machine and release the accumulator pressure? 7 If the hydraulic lock of the boom is opened without fixing the corresponding boom first, is there a danger that the boom will fall and hurt people? Maintenance method? 1. The maintenance method of concrete pump truck shall conform to the corresponding requirements and methods in the maintenance manual. In the process of daily use, the relevant items of the pump truck should be checked before and after use. ? 2. According to the corresponding requirements and methods in the operation and maintenance manual and referring to the lubrication table, lubricate all parts of the pump truck timely and fully. ? 3. According to the corresponding requirements and methods in the operation and maintenance manual, select the specified type of hydraulic oil and change the oil for the hydraulic system regularly. ? 4. According to the maintenance methods and requirements in the user manual of the concrete pump truck, regularly check the water tank, concrete cylinder and concrete delivery pipe of the pumping system. ? 5. According to the corresponding requirements and methods in the operation and maintenance manual, regularly check and adjust the torque of the fixing bolts of the boom rotating base. ? 6, according to the maintenance method in the concrete pump truck user manual, regularly check and adjust the boom, rotating base, legs, supporting structure, reducer and other components. ? 7. Regularly check the working conditions of hydraulic system and components, electrical system and components according to the corresponding requirements and methods in the operation and maintenance manual. ? 8, in view of the cold weather concrete pump truck maintenance method should be adopted. ?