Tower cranes typically use a combination of fixed and movable pulleys to lift and lower heavy loads. The pulleys are usually attached to the jib or boom of the crane and are used to change the direction and increase the mechanical advantage of the lifting system.
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Some common types of pulleys used in tower cranes include:
1. Fixed Pulleys: These are stationary pulleys that are mounted at a fixed point on the crane. They change the direction of the lifting force and help distribute the load evenly.
2. Movable Pulleys: These pulleys are attached to a movable block that can be raised or lowered along the jib or boom of the crane. They provide additional mechanical advantage and allow for easier lifting of heavy loads.
3. Trolley Pulleys: These pulleys are used in conjunction with a trolley system that allows the crane to move horizontally along the jib or boom. The trolley pulleys help distribute the load evenly and provide smooth movement of the crane.
4. Counterweight Pulleys: Tower cranes often use a counterweight system to balance the load being lifted. Counterweight pulleys are used to attach the counterweights to the crane and ensure proper balance and stability.
It's important to note that the specific configuration and number of pulleys used in a Tower Crane can vary depending on the crane model and lifting capacity.
Zhongshan Municipal Chamber of Commerce LED Special Committee held the first meeting of the Secretary-General in 2016
Secretary-General Wang Yixiang first congratulated the representatives of the two companies on their duties as the new deputy secretary-general of the LED Special Committee and became the comrade-in-arms of the LED Special Committee and the side-by-side fighters. He pointed out: To become a qualified secretary-general, we must work hard to be the first few job roles. First, we must be a waiter, help the member companies to develop and solve problems for members. On the morning of August 16, the Hunan Chamber of Commerce in Zhongshan City The first meeting of the Secretary-General of the LED Committee was held in the Secretariat of the second floor of the Oriental Plaza in Guzhen. Deputy Secretary-General Deng Juxiang and He Wang attended the meeting. Secretary-General Wang Yuxiang presided over the meeting and delivered a speech. Secretary-General Wang Yixiang first congratulated the representatives of the two companies on their duties as the new deputy secretary-general of the LED Special Committee and became the comrade-in-arms of the LED Special Committee and the side-by-side fighters. He pointed out: To become a qualified secretary-general, we must work hard to be the first few job roles. First, we must be a waiter, help the development of member companies and help solve problems for members. Second, we must be a small butler. The competent and efficient team of the Secretariat; the third is to be the chief of staff, actively contribute to the role of the assistant to the president; the fourth is to be a public relations, to coordinate and handle all aspects of the relationship; Home, a master of integrating social resources. â–²Wang Xiaoxiang (right), deputy secretary-general of the Hunan Provincial Chamber of Commerce LED Committee (right), deputy secretary-general Deng Juxiang (middle), deputy secretary-general He Wang (left) The new deputy secretary-general of He Wang believes that the work of the secretariat must be highly Responsibility and professionalism, and we must do the LED special work as our own business, and fully committed to it, this is the prerequisite for doing a good job in the LED Special Committee. To serve a good member, we must first study the members. The personal hobbies of each member, the scope of business operations, and the departmental units that are mainly engaged in research must be thoroughly studied, so that all the service work can respond quickly. Be targeted, purposeful, and time-effective. The new deputy secretary-general Deng Juxiang believes that it is necessary for the LED special committee to hold the office meeting of the Secretary-General. It is not only an initiative of the LED special committee's innovation system and mechanism, but also a new link between the LED special committee and member companies. The bridge will make the connection between the LED special committee and the member companies more smooth and close, which will inevitably help to implement and refine the services of the LED special committee and enhance the mutuality and stickiness of both parties. It is hoped that the LED Special Committee will hold such a meeting in the future, so that the needs of member companies and the service work of the Chamber of Commerce can be truly matched. Finally, the three deputy secretary-generals discussed how the LED committee will increase the value-added services for members, hotels, restaurants, etc., so that the members can bring substantial, preferential and caring services during business activities, and visited the directors in the afternoon. The unit of Zhongshan Xianghuige Catering Management Co., Ltd., the three secretary-generals to the director Liu Qirui, the general manager of the company to understand the company's operation and consult the LED committee to provide valuable advice and suggestions. Brief introduction of the deputy secretary-general of the LED special committee: Deng Juxiang, director of the operation of Zhongshan Huabiao Testing Co., Ltd., Zhongshan Loudi, Zhongshan, China. Founded in late 2008, Zhongshan Huabiao Testing Co., Ltd. is a professional lighting and lighting product testing and certification organization. Directly provide third-party certification and testing services and system consulting services for lighting products. It is a third-party testing laboratory accredited by the China National Accreditation Service for Conformity Assessment (CNAS) and a member of the International Laboratory Accreditation Cooperation Organization (ILA). It is also an authorized laboratory authorized and recognized by German TUV, US UL, FCC, ITS, SAA, CSA and other international agencies. It is also the first private laboratory in the lighting industry to be equipped with a photobiosafety testing program. He Wang, Yiyang City, Hunan Yiyang City Wanjingyuan Electronics Co., Ltd. General Manager Yiyang Wanjingyuan Electronics Co., Ltd. was established in 1989, its predecessor is the state-owned Xiangzhong Electronic Technology High-tech Development Enterprise, the company collects aluminum electrolytic capacitor research, Development, design and manufacturing in one, and obtained a number of patents, JSH brand products that have won the famous provincial trademarks are suitable for high-end electronic energy-saving lamps, electronic ballasts, LED drives, power supplies and other electronic equipment. (He Liangzhou, correspondent of LED Committee of Zhongshan Chamber of Commerce, Zhongshan City)