1. Introduction Since the reform and opening up, the annual output value of China's packaging industry has increased at a high rate of 18.65%. The development of the packaging industry has benefited from the implementation of the Party Central Committee's strategy of "invigorating the country through science and education". China's packaging higher education, which began to develop in 1985, has cultivated a large number of packaging technology talents that are urgently required by the country and made indelible contributions to the development of China's packaging industry. However, there are both successful and unsuccessful lessons in the process of setting up a packaging engineering profession. In the face of the international community’s “scientific and technological advances, increasingly fierce competition in national power; knowledge economy is a clue; economic globalization is unstoppableâ€, a serious and sharp taxation issue is before us: in the next 20 years, China will How does the packaging industry continue to maintain rapid growth?
The packaging and education department is the new force for the “science and education revitalization package†and shoulders the important task of training talents for packaging technology in the country. The information age, scientific and technological progress, and knowledge economy have put forward higher requirements for the overall quality of packaging professionals. They must not only have a solid grasp. The basic knowledge must also have certain ability to innovate, practical ability, and ability to quickly learn a new knowledge. Packaging higher education must adapt to the development of packaging in our country and accomplish its own glorious mission. It must increase the intensity of teaching reforms. At the same time, it also needs the attention and support of the whole society, especially the packaging industry. It is worth advocating that some units take the path of combining factory and school.
2. The reform of packaged higher education requires social attention and strong support. 2.1 The reform of packaging teaching content requires the support of the packaging industry and even the whole society to improve the overall quality of packaging students and cultivate their innovative capabilities. This is an important factor in the reform of higher packaging education. One of the goals. To achieve this goal, we must carry out teaching content reforms. Students can learn solid basic theory and new professional knowledge while they are in school. At the same time, there are certain new disciplines such as information science, life sciences, materials science and nanotechnology that will have a major impact on future development. The understanding of this requires that the construction of packaging materials must be carried out dynamically to prevent the content from aging.
The packaging engineering education has published two sets of textbooks, which have played an important role in the development of packaging higher education. Over the past 18 years since the specialty was set up, the level of technology, equipment, and technology of the packaging industry in China have changed greatly. Widely used computer technology, packaging information network has been established; eco-friendly, environmentally friendly packaging materials have developed rapidly, and anti-static, anti-electromagnetic and invisible special packaging materials developed using nanotechnology have been introduced one after another; reflecting the trend of packaging design and digital plate making The equipment is of concern; the application of carton die-cutting CAD/CAM system eliminates the old craftsmanship; the box-making production line integrating printing, die-cutting, folding and gluing, and the high-speed, multi-functional, fully automatic packaging production line The launch of the system has eliminated the backwardness of manual or semi-mechanized operations in box making and packaging operations.
However, these new technologies, new processes, new materials, and new equipment that have appeared in the packaging industry have not been reflected in the textbooks of the two packaging systems. Although the publication of textbooks requires a certain period of time, some of the contents are aged and lagging behind, but the fundamental reason is that many units use technical secrecy on advanced equipment (especially imported equipment) and technical materials, so that it is too difficult to collect materials in writing materials. (To be continued)
The packaging and education department is the new force for the “science and education revitalization package†and shoulders the important task of training talents for packaging technology in the country. The information age, scientific and technological progress, and knowledge economy have put forward higher requirements for the overall quality of packaging professionals. They must not only have a solid grasp. The basic knowledge must also have certain ability to innovate, practical ability, and ability to quickly learn a new knowledge. Packaging higher education must adapt to the development of packaging in our country and accomplish its own glorious mission. It must increase the intensity of teaching reforms. At the same time, it also needs the attention and support of the whole society, especially the packaging industry. It is worth advocating that some units take the path of combining factory and school.
2. The reform of packaged higher education requires social attention and strong support. 2.1 The reform of packaging teaching content requires the support of the packaging industry and even the whole society to improve the overall quality of packaging students and cultivate their innovative capabilities. This is an important factor in the reform of higher packaging education. One of the goals. To achieve this goal, we must carry out teaching content reforms. Students can learn solid basic theory and new professional knowledge while they are in school. At the same time, there are certain new disciplines such as information science, life sciences, materials science and nanotechnology that will have a major impact on future development. The understanding of this requires that the construction of packaging materials must be carried out dynamically to prevent the content from aging.
The packaging engineering education has published two sets of textbooks, which have played an important role in the development of packaging higher education. Over the past 18 years since the specialty was set up, the level of technology, equipment, and technology of the packaging industry in China have changed greatly. Widely used computer technology, packaging information network has been established; eco-friendly, environmentally friendly packaging materials have developed rapidly, and anti-static, anti-electromagnetic and invisible special packaging materials developed using nanotechnology have been introduced one after another; reflecting the trend of packaging design and digital plate making The equipment is of concern; the application of carton die-cutting CAD/CAM system eliminates the old craftsmanship; the box-making production line integrating printing, die-cutting, folding and gluing, and the high-speed, multi-functional, fully automatic packaging production line The launch of the system has eliminated the backwardness of manual or semi-mechanized operations in box making and packaging operations.
However, these new technologies, new processes, new materials, and new equipment that have appeared in the packaging industry have not been reflected in the textbooks of the two packaging systems. Although the publication of textbooks requires a certain period of time, some of the contents are aged and lagging behind, but the fundamental reason is that many units use technical secrecy on advanced equipment (especially imported equipment) and technical materials, so that it is too difficult to collect materials in writing materials. (To be continued)
High-altitude Operation Truck, Aerial work truck, Sky lift truck, Overhead working truck transport refers to the staff and equipment to the site to be used and air operations of special vehicles.
Through the big arm front bracket, can be quickly installed lifting device or platform, realize the material function such as lifting, lifting, and manned aerial work, at the same time to extension assignments device and a variety of work device quickly switch provides the interface.
3 d rotation lift
Design three-dimensional rotating lift device, already can keep by lifting material profile automatically, and can realize the lifting materials in space any height, any location and any direction adjustment request, sensitive speed control precision, micro performance is good, can meet the large underground structure in high altitude and ventilation pipe installation requirements.
classification
According to the form of its lifting mechanism, generally can be divided into the telescopic arm type (ZhiBeiShi), folding arm type (crank arm type), vertical lift and hybrid four basic forms, etc.
Shear fork
Shear fork overhead working truck aerial work special equipment is widely used. The mechanical structure of it, make the lifting platform lifting has high stability, wide operating platform and high bearing capacity, larger, and the area of aerial work for many people work at the same time. It makes the work high above the more efficient, safe and more security.
Telescopic jib
Telescopic boom type aerial work platform is in the service in various industries aerial work, equipment installation, maintenance and other mobility aerial work products. Telescopic boom type aerial work platform is mainly divided into ZhiBeiShi aerial work platform and arm type aerial work platform. More used in the shipyard and other highly demanding place, this kind of machine safety is good, easy to move, but the cost is very high.
The crank arm type
Crank arm type overhead working truck mobile convenience, crank arm structure is compact. The new type of high quality steel, high strength, light weight, direct access to the alternating current (ac) or the power to start the car itself, construction speed is quick, with a telescopic boom, workbench extension, as well as rise, still can rotate 360 degrees, the obstacles to reach the working position, is the ideal aerial work equipment.
The crank arm type aerial work platform
Set of cylinder type
Set of overhead working truck cylinder type is a multipurpose aerial work machinery, its function will be carrying workers and use of equipment platform to the specified height carries on the special engineering equipment of the air. This equipment is widely used in industrial workshop, tall hall, warehouse, station, the work high above the square, etc. The machine by the platform, telescopic oil cylinder, single or dual ladder ladder type type anti-rotating tank body, chassis, leg, wheel, etc. Have telescopic cylinder direct jack-up platform, when start the motor, driven by the motor gear pump oil, the oil valve and electromagnetic input channels with oil cylinder, telescopic cylinder is up one by one day, when the platform when the system pressure reaches the maximum height to reach the rated working pressure, at this time have the unloading overflow valve, oil pressure to keep work at constant pressure, after the stop check valve pressure maintaining, platform will stay in the largest working position, platform can be below the maximum height according to the height of the scene of the homework stay at any position.
Working device
Overhead working truck working device including the leg mechanism, the lifting mechanism, slewing mechanism, operation platform and leveling mechanism, etc.
(1) the leg mechanism
Currently use hydraulic leg more. Use of automobile engine out of power to drive the hydraulic pump, through the control valve hydraulic pump of hydraulic oil supply working cylinder of the hydraulic leg, leg is adjustable. On both sides of overhead working truck, general equipped with a joystick, can make the four hydraulic leg around alone extend or retract, so even on uneven or dumping ground, also can adjust the body to the level state, the safe operation.
The rise and fall of implementation work platform and transformer.
Vertical lift lifting mechanism according to the transmission mode can be divided into hydraulic drive and mechanical drive, according to its structure can be divided into crossover scissors and sleeve. Cross scissors according to cross to decorate, articulated into scissors in the shape of a connecting rod frame structure. When changing the Angle of the connecting rod cross the lifting movement. The change of the connecting rod cross Angle, through the hydraulic oil cylinder piston rod or wire rope for release. Telescopic girder, box-type or cylindrical, finished with a multi sleeve telescopic lifting movement, drive mode can use hydraulic transmission or wire rope pulley. The job of lifting mechanism of vertical lift height is limited, scope of work is lesser, but the work platform is bigger, and support and stability.
Telescopic crane lifting mechanism of movable arm type can be divided into type or ZhiBeiShi, folding arm type or crank arm type, mixing arm type, this is the mainstream form of lifting mechanism. Telescopic arm lifting mechanism by multiple class suits, scalable box arm, including basic arm and telescopic arm, telescopic boom section for a day or more, the internode is equipped with hydraulic cylinder. When the hydraulic cylinder is working, the arm driven by hydraulic cylinder piston rod can slide up and down the guide element, which changes the length of the boom. Folding arm lifting mechanism composed of multiple box arms folded, can be divided into the folding and folding, folding and unfolding of each knuckle arm performed by each internode of hydraulic cylinder. Can complete a certain height and scope of operation, the folding space under ground plane can be completed homework. Mixing arm lifting mechanism consists of folding arm and telescopic boom, combined with the advantages of both, to expand the height of the homework and amplitude, and have strong ability of the disabled.
(3) the slewing mechanism
Usually takes the rotary swing mechanism, and reversing the direction can undertake choosing according to the requirements of the job. With reduction effect is usually driven by hydraulic motor rotating mechanical rotary device. Slewing mechanism of rotary parts and operation platform are installed on the rotary bearing the turntable. Drive device is fixed on the turntable, its bottom is equipped with drive gear. Rotary bearing by inner gear ring of the turntable and connected to the frame fixed seat. When the driver turns, the gear and the fixed ring gear meshing, along the ring gear rolling gear, drive turntable rotation. Between the turntable and the fixed gear ring seat with a ball or roller, in order to reduce the frictional resistance of turntable. Slewing mechanism of mechanical transmission form can use worm worm gear, cycloidal or planetary gear transmission ways.
(4) the work platform and leveling mechanism
The end connection of lifting mechanism of operation platform, is used for basic building blocks for the manned or equipment. In order to ensure the safety work and prevent equipment operation personnel, on the structure and performance of the work platform put forward specific requirements. Such as platform barrier height, width, non-slip surface platform, platform of seat belts, and so on.
In order to make the work platform at the bottom of the plane is always in the process of operation level, the work high above the car is equipped with automatic leveling work platform level institutions, mainly mechanical, liquid machine combination, electrohydraulic combined three categories.
High-Altitude Operation Truck,Aerial Platform Truck,Aerial Working Platform Truck,High Up Truck
CLW GROUP TRUCK , https://www.clwgrouptruck.net