As the weather gets hotter and hotter, the workers on the construction site are also suffering. Because there are news of workers suffering from heatstroke in many construction sites in the recent news, so with the development of technology, we have a lot of construction tools. Help the construction site workers to reduce the burden, such as the construction of elevators , then the small editor for everyone to introduce the construction elevator , to see how it helps the construction workers to reduce the burden of it! Construction lifts Construction elevators, also known as construction elevators, can also be used as outdoor lifts to lift cages on site. It is a manned cargo construction machine that is frequently used in construction and is mainly used for the construction of high-rise buildings such as interior and exterior decoration, bridges, and chimneys. Due to its unique cabinet structure, construction personnel can ride comfortably and safely. Construction lifts are usually used with tower cranes on the construction site. Typical construction lifts have a load capacity of 1-10 tons and a speed of 1-60 m/min. There are many kinds of construction elevators, and they are divided into two types according to the mode of operation: no counterweight and counterweight; according to the control mode, they are divided into manual control type and automatic control type. According to the actual needs can also be added frequency conversion device and PLC control module, in addition can also add floor call device and floor device. Construction lift working principle The hydraulic oil is formed by the vane pump to a certain pressure. After the oil filter, the flameproof electromagnetic directional valve, the throttle valve, the hydraulic check valve and the balance valve enter the lower end of the hydraulic cylinder, the piston of the hydraulic cylinder moves upward and lifts the weight. The upper cylinder of the hydraulic cylinder returns to the fuel tank via the explosion-proof electromagnetic directional valve. The rated pressure is adjusted through the relief valve, and the pressure gauge is used to observe the reading of the pressure gauge. The piston of the cylinder moves downwards (both weights drop). The hydraulic oil enters the upper end of the hydraulic cylinder through the explosion-proof electromagnetic reversing valve. The return oil at the lower end of the hydraulic cylinder is returned to the tank by the balance valve, the hydraulic-controlled check valve, the throttle valve, and the explosion-proof electromagnetic reversing valve. In order to make the weight descend smoothly, the brake is safe and reliable. The balance valve is set on the return oil road to balance the loop and maintain the pressure so that the falling speed is not changed by heavy objects. The flow is adjusted by the throttle valve to control the lifting speed. In order to make the brake safe and reliable, prevent accidents, increase the hydraulic control check valve, that is, hydraulic lock, to ensure safe self-locking when the hydraulic line accidentally burst. An overloaded voice-activated alarm was installed to distinguish between overload or equipment failure. The electrical control system controls the rotation of the motor through the explosion-proof buttons SB1-SB6, the commutation of the flameproof electromagnetic directional valve to keep the load from increasing or decreasing, and adjust the time delay through the “LOGO†program to avoid the frequent start of the motor. Service life. Construction elevator main features High safety factor The design of the top section of the standard section without racks ensures that the cage will not fall, and the installation of limit and limit switches and anti-fall safety devices ensures the safety of the construction personnel. Drive System The noise in the cage is reduced, so that the net clearance in the cage increases, and at the same time, the transmission is more stable and the mechanism vibration is smaller. Convenient and versatile On the basis of traditional construction elevators, steel reinforcement transporters and concrete transporters are installed to transport steel, concrete, and construction personnel, greatly increasing construction efficiency; optional stepless variable frequency speed control system with advanced performance enables elevators to achieve 0~ 60m/min stepless speed regulation, smooth running without impact Attachment system The variable attachment system allows the machine to be used on complex and varied buildings. Construction lift safety rules range This standard specifies the safety rules for the design, manufacture and installation of construction elevators (hereinafter referred to as elevators). This standard applies to all types and specifications of lifts included in GB/T 10052. standard GB 1102 round wire rope GB 3811 crane design specification GB 8918 high quality wire rope GB/T 10052 construction elevators classification GB/T 10054 construction elevator technical conditions GB 10053 Construction Lift Inspection Rules Construction elevator installation and disassembly Pre-installation requirements 1. The installation quality of elevators directly affects its working performance. In order to make the equipment work safely and reliably and ensure its useful life, it must be installed strictly according to requirements. 2. The units and individuals participating in the installation must have corresponding qualifications and meet relevant requirements. 3. Participating installers must undergo professional training, be familiar with the main features and characteristics of the elevators to be installed, possess skilled mechanical operation skills, and eliminate general faults. 4. Installers should have physical health, no hypertension, heart disease and other diseases and should have a certain degree of education. 5. The installer must wear safety protection devices (such as safety helmets, safety belts, etc.) as required, and it is strictly prohibited to install and operate after drinking. 6. The installation personnel should follow the unified command in the installation process. The division of labor is clear and they are each responsible. They must not leave or exchange positions with one another. 7. During the installation work, the number of people on the top platform of each cage shall not exceed two, and the load of the lifts shall not exceed 500kg. Qualification requirements The construction elevator is a large-scale vertical transportation equipment. Its installation and dismantlement must be issued by the construction administrative department and issued by the provincial, prefecture and city safety production supervision and management or special equipment supervision and administration authority. The tower cranes (construction elevators) were installed by professional units that installed and repaired safety licenses. Installation and removal 1. Before each installation and demolition operation of the construction elevator, the company shall prepare the installation and disassembly plan according to the work environment and auxiliary equipment conditions at the construction site, and shall be implemented only after the approval of the enterprise technical person in charge. 2. Before each installation or dismantling of a job, it is necessary for the operator to perform detailed technical and safety disclosures according to different types of work and job contents. Personnel involved in the assembly and disassembly must hold a special qualification certificate. 3. After each installation of the lift, the construction company shall organize relevant functional departments and professionals to carry out the necessary tests and acceptance of the lifts. After passing the inspection, it shall be reported to the testing organization recognized by the local construction administrative department, and it shall be formally put into use after being tested and qualified by a professional testing agency. 4. Before the installation of the lift, the following parts of the lift shall be inspected: 1 The completeness and integrity of metal structures such as guide rails and cages 2 Assembly precision and contact length of gears, speed limiters of transmission system 3 Whether the main circuit and control circuit of the electrical equipment meet the national product standards 4 whether the basic position and practice meet the design requirements of the product 5Whether the concrete strength and the bolt holes at the attachment wall bracket meet the installation conditions 6 Whether all safety devices are complete, whether the installation position is correct and firm, and whether each limit switch action is sensitive and reliable 7 Lift installation environment has no effect on the operating safety factors 5. The installation operation shall strictly comply with the pre-determined installation plan and construction process requirements. During the installation process, there shall be special personnel to conduct the unified command, draw out the warning area, and have special personnel to monitor. 6. Installation and dismantlement work should be carried out during the day and should be stopped in bad weather. 7. The operator should fasten the seat belt according to the requirements of the work at a height. 8. It is forbidden to throw the object down from a height when disassembling. Editor's summary: Construction elevators are very important in the construction process. Its importance is self-evident, and the use of construction elevators also increases the safety of workers. Therefore, the elevator is a guarantee for workers and a good helper for the workers. Therefore, it is indispensable to have a lift at the time of construction. 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â’ˆ simple and reasonable structure, low operating costs.
â’‰ crushing rate, energy saving.
â’Š with a crushing, coarse grinding function.
â’‹ moisture content of materials subject to the influence of small, moisture content up to 8%.
⒌ more suitable for crushing hard, special hard material.
â’ product excellent in grain shape, cubic, flakiness content is extremely low.