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About "Ten Not Hanging" in the Use of Tower Crane

About "Ten Not Hanging" in the Use of Tower Crane

  Tower cranes are widely used as vertical transportation machinery in construction operations, and have become indispensable construction machinery in construction. As a large-scale construction machine, the analysis has the following characteristics from a safety perspective: 1. It usually has a huge structure and a relatively complicated mechanism, which can complete one lifting movement, one or several horizontal movements.   2. There are many kinds of heavy loads, and the load is variable.   3. It needs to be operated directly in a large range, and the activity space is large.   4. There are many exposed and moving parts, and often come in direct contact with lifting operators (such as hooks, wire ropes, etc.), which has many potential risk factors.   5. Complex operating environment.   6. It is often necessary for multiple people to cooperate to complete an operation.   The existence of many of the above-mentioned risk factors determines that there are many accidents of lifting injuries, and once an accident occurs on the tower crane, not only the property loss but also the personal injury most of the time, the impact is greater, so it has been classified as special equipment management. The manufacturing, installation, use, and maintenance of the company have issued relevant specifications and regulations. The relevant departments or units have summarized the "ten no lifting" regulations for lifting operations as long as they adhere to this "ten no lifting" "In principle, tower crane accidents can be avoided to the greatest extent. However, in the actual production, there is no scientific, specific and practical version of the "ten-no-hang", and there are no special provisions in the relevant specifications of the tower crane. This article attempts to analyze and summarize the various versions of our site and various specifications of tower cranes, and on this basis, put forward specific regulations on the "ten do not hang" tower cranes for your reference.   Now lists the relevant "ten not hang" circulated in our place as follows:   1. The tower crane "Ten No Cranes" in the book "Safety Management System for Construction Sites" issued by Chengdu Safety Supervision and Management Station:   1. Someone staying or walking under the boom and lifting heavy objects is not allowed to hang.   2. The hoisting command should be performed by full-time personnel qualified in technical training. No command or unclear signal is not allowed to hoist.   3. Slender materials and multiple objects such as steel bars, steel bars, pipes, etc. must be tied firmly, and the single-headed "kilogram" or untied strapping is not allowed to hang.   4. Perforated plates, hoppers, and hand-pull dump trucks do not require four-point or large template plug-in plates, and are not allowed to hang when unloading armor cranes. Prefabricated reinforced concrete floor slabs are not allowed to be double-slung.   5. Hanging blocks must use safe and reliable block fixtures. Hanging bricks must use brick cages and be neatly stacked. Wooden bricks, embedded parts and other sporadic objects should be stably stacked with containers.   6. Floor, girders and other hanging objects are not allowed to hang.   7. Sheet piles, well point pipes, etc. buried in the ground, as well as sticking and adhering objects are not allowed to hang.   8. Multi-machine operation should ensure that the distance of lifting heavy objects is not less than 3m. When operating on multiple machines on the same track, it is not allowed to hang without safety measures.   9. Strong winds above level 6 are not allowed to hang.   10. Hanging heavy objects or exceeding mechanical allowable load is not allowed to hang.   The first of the above, "Someone stays or walks under the boom is not allowed to hang". This is definitely unavoidable in the construction site, because when the crane crane rotates, it almost covers the entire site, under the boom. There must be someone who stays or walks; "there is a person who stays or walks under the suspended heavy object and is not allowed to hang" is already contradictory. If it has already been lifted, it is required that it is not allowed to be hung, so this is meaningless. In the fourth article, the hopper is probably a special hopper that is equipped with the tower crane. This must be lifted at four points, but the hand-overturned hopper truck is afraid that it is forbidden to be used for lifting materials, so this article should also be modified; the rest of the articles are only It illustrates some particularities, not completely.   Second, the tower crane "Ten No Cranes" in "Migrant Workers Night School Reader" from Chengdu Safety Supervision and Management Station   1. Overload and oblique pulling are not allowed to hang.   2. The bulk goods are too full or the strapping is not allowed to hang.   3. No command, disorderly command and unclear command signal.   4. The edge of the hanging object is sharp and ther
Time of issue: : 2020-05-05 Number of views : 0
Several factors causing the accident of tower crane

Several factors causing the accident of tower crane

  Due to the particularity and structure of the tower crane, its safety concealment exists in many factors such as installation, use, management, natural environment and so on.   (1) The structure of the tower crane itself   The rigidity, stability and strength of the tower crane steel structure directly affect the safety of the tower crane. Because the crane is subjected to frequent alternating loads during the operation, it is very easy for the steel structure friends to fatigue and break the maple. For example, cracking of the welding seam of the tower crane web, fracture, deformation, and bending of the base material reduce the rigidity, stability, and strength of the structure, cause the steel structure to break thinly, and destroy the local stability of the steel structure. Introduce friends accident.   (2) The quality of electrical systems and institutions   The working mechanism of the tower crane adopts electrical movement and control. The advantages are convenient control, saving cost and low cost. At the same time, electrical components are easy to achieve standardization and generalization, easy to replace and maintain, and easy to realize various safety protections. The working state of the electrical system of the organization determines the reliability, safety and performance of the tower crane. If there is damage or abnormality. It may cause an accident. If the electrical system fails, it can cause shock vibration of the mechanism, resulting in broken shafts and broken teeth and attracting friends. Damaged clutches or brakes or vector control may cause crashes and heavy objects. Aging electrical insulation or broken cabinets may cause electric shock. The failure of various safety devices may lead to accidents such as falling towers, folding arms and falling heavy objects. If the amplitude limit or travel limit is invalid, it may cause a big car or a small car to rush and even derail. The overload limiter and torque limiter fail, and the arm and tower may fall.   The failure of the height limiter may cause the wire rope to overwrap into broken rope and fall accidents of heavy objects. Phase sequence protection vector rescue, in the case of wrong phase and broken phase. It may cause disorder of operation instructions and cause accidents.   (3) Human factors   In many tower crane accidents. Most accidents are due to user violations or misuses. The two accidents mentioned below also have elements of illegal operations.   A non-driver of a certain unit does not ring the bell to drive. As a result, the extravagant workers on the track were crushed. When the installation team of a machinery construction company inspected the TQSOB tower crane, in order to replace the boom puller, it was prepared to remove the balance weight first and then replace the pull plate pin to connect the boom and the lifting rope together , And then use the car to lift the boom. Open the boom pull plate pin. When lowering the boom, the backward tilting moment due to the balance weight is very large, causing the tower crane to lose its balance and causing the balance arm and the tower tip to fall together.   Accident during disassembly. Due to the high weight of the metal structure of the tower body, the disassembly and assembly of the tower crane is a high-altitude operation, which is dangerous and technical. Among the tower crane accidents, the accidents during the disassembly and assembly account for a considerable proportion, and they are relatively large accidents. Some tower cranes are not disassembled by professional installation teams but by non-professionals. Due to the low quality of the installation personnel, the ability to prepare installation plans, the ability to select schemes and mechanical calculations, and the ability to formulate scientific disassembly and assembly, so that new problems or special problems in the operation process cannot be solved, something happened   is inevitable. The quality of some installations is substandard, leaving hidden dangers.   Improper management. Insufficient training of the staff, insufficient understanding and implementation of various rules and regulations, and insufficient management of the work site have all laid hidden dangers for the accident. Some enterprises have unsound systems and staff have no rules to follow, so they have to rely on personal experience to operate and are prone to making mistakes. Some enterprises do not implement special personnel planes. In addition, different factory models have different operation handles. Therefore, it is possible for the driver to make mistakes; some work sites temporarily combine some staff for work needs, making it difficult for the commander, driver, and rigger to achieve   The industry is coordinated, and some non-professionals or leaders temporarily act as operating personnel, which will inevitably lead to errors and accidents; some companies do not pay attention to maintenance management and fail to eli
Time of issue: : 2020-02-04 Number of views : 0
Maintenance of slewing bearing device of tower crane

Maintenance of slewing bearing device of tower crane

  (1) The mounting support of the slewing bearing (the seat supporting the bottom surface of the ring gear and the seat placed on the upper surface of the inner ring) must have sufficient rigidity, and the mounting surface should be flat. Before assembling the slewing bearing, the bearing should be stress-relieved to reduce the deformation of the slewing bearing. The contact surface of the bearing and the slewing bearing must be cleaned up during assembly.   (2) Pay attention to the change of noise and the change of rotation resistance torque during use, and disassemble and inspect if there is any abnormal phenomenon.   (3) The slewing bearing must be lifted or stored horizontally. Do not lift or store it vertically to avoid deformation.   (4) Before the bolts are fully tightened, the gear meshing inspection should be performed, and the meshing condition should meet the requirements of gear accuracy: that is, the contact spots distributed on the tooth surface of the gear pair after running under slight braking are in the height direction of the gear teeth Not less than 25%, not less than 30% in the length direction of gear teeth.   (5) The debris should be removed once for 10 shifts of tooth surface work, and re-applied with grease.   (6) In order to ensure the reliability of the bolt work and avoid the insufficient preload of the bolt, the preload torque of the bolt should be checked separately after the first 100 hours and 500 hours of the slewing bearing work. The pre-tightening torque should be checked every 1000 hours thereafter.   (7) High-strength bolts and nuts are used for bolts and nuts connected to the slewing bearing; double nuts are used for fastening and anti-loosening.   (8) When tightening the nut, the thread of the bolt and the end surface of the nut should be coated with lubricating oil, and should be tightened with a torque wrench symmetrically and evenly in the circumferential direction multiple times. During the last tightening, the pre-tightening torque on each bolt should be approximately uniform.   (9) Four oil cups are evenly distributed on the upper surface of the slewing ring gear aligned with the raceway, thereby adding grease to the raceway. Under normal circumstances, the slewing bearing is lubricated once every 50 hours. Each time you add oil, you must add enough oil until grease leaks from the seal.
Time of issue: : 2020-01-07 Number of views : 0

Subsidiaries

07
2018-07

Linyi Huaxia Heavy Industry Co., Ltd.

Time of issue: : 2018-07--07 Number of views : 0
  Linyi Huaxia Heavy Industry Co., Ltd. is located in the Huaxia Industrial Park of Linyi Economic Development Zone. It is a subsidiary invested and established by Shandong Huaxia Group, a national tower crane manufacturer. It covers an area of ​​630 acres and has a construction area of ​​100,000 square meters. It is mainly engaged in tower cranes, Production and sales of elevators and related accessories.   Linyi Huaxia Heavy Industry Co., Ltd. was established in October 2007, with an annual output of 12,000 heavy construction machines.   Linyi Huaxia Heavy Industry Co., Ltd. has advanced production technology, perfect quality management system, standardized management system and perfect after-sales service system. It has passed ISO9001: 2008 quality management system certification, AAA standardization enterprise good behavior confirmation and measurement qualification confirmation. It has also established a quick response mechanism for the interactive coordination between the after-sales service department, sales outlets and production plants. Once a customer reports a problem, it will immediately investigate and solve it without delay.   "Huaxia" brand tower cranes have been sold nationwide for 12 consecutive years since 1999, with a market share of 20%. At the same time, they have been exported to 37 countries and regions in Asia, Europe, America and Africa. At present, the products mainly include four series of QTZ315, QTZ40, QTZ63 and SC200/200, and dozens of models with different specifications. The "Huaxia" trademark was rated as "China's Well-known Trademark" by the State Administration for Industry and Commerce. Over the years, the company has always adhered to the "quality-oriented, customer first" production and management philosophy, survival by quality, service to win development, with high-quality products and service integrity to the new and old customers, was awarded by the people's government at all levels " Shandong Leading Enterprise of High-quality Products", "Linyi City Mayor Quality Award", "Linyi City Abide by Contract and Creditworthy Enterprise", "Linyi Top 100 Enterprises", "Linyi City Star Enterprise", "Linyi City Economic Development Zone Advanced Enterprise" , "Linyi City Economic Development Zone Merit Enterprise", "Linyi City Economic Development Zone Advanced Grassroots Party Organization" and other honorary titles. The company firmly establishes the value concept of "creating a Chinese famous brand and prospering China's great cause". With the grand goal of building tens of billions of China's businesses, it takes the road of honest management, the road of technology to promote enterprises, the road of talents to strengthen enterprises, and advances with the times. Pioneering and innovative, striving for first-class brand, striving to be a first-class enterprise. Strive to relocate Shandong Huaxia Group's strong capital advantage, strong technical force and intensive sales network to Linyi Huaxia Industrial Park in three to five years, and transform Linyi Huaxia Heavy Industry Co., Ltd. into a heavy industry enterprise in Lunan.
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05
2018-06

Linyi Heavy Industry won the honorary title of Linyi Enterprise Technology Center

Time of issue: : 2018-06--05 Number of views : 0
  In mid-October, the Linyi City Economic and Information Technology Commission (hereinafter referred to as the Municipal Economic and Information Commission) applied to 33 enterprises in Linyi City to apply for the recognition of the 2012 municipal-level enterprise technology center. After the prescribed procedures such as enterprise defense, expert scoring, and comprehensive evaluation, It was evaluated that Linyi Heavy Industry was in line with the technical identification standards of Linyi City-level enterprises and won the honorary title of Linyi City Enterprise Technology Center.   In order to further accelerate the construction of the company's technology center, improve the company's technological innovation capabilities, and play a leading role in the technology center's demonstration in the development of the company, the company has actively organized to participate in the declaration work after receiving the notification of the technology center's certification. In accordance with the relevant provisions of the "Administrative Measures for Linyi City Enterprise Technology Center", the company accepts the strict review of the Municipal Economic and Information Commission from the organizational structure, research and development personnel, industry-university-research cooperation, scientific and technological input, test equipment and innovation mechanism, etc. The stage of material review and review and defense finally stood out among many enterprises in Linyi and won the title of "Linyi Municipal Enterprise Technology Center"   Linyi Heavy Industry has always adhered to the road of technological innovation, eliminated backward production capacity in time according to market demand, and continuously carried out technological innovation and transformation of products. The products have gradually realized the transformation and upgrade from low-end to medium-high grade, and have obtained good economic benefits.   It is reported that this time the company won the Linyi City-level Enterprise Technology Center. The Linyi Municipal Government will give preferential treatment to Linyi heavy industry taxation and other projects in accordance with relevant policies to effectively reduce the company's burden.
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07
2018-03

Weihai Heavy Industry actively participated in the training of gold and blue collars, singing the good voice of China

Time of issue: : 2018-03--07 Number of views : 0
  In response to the municipal government's call to "strengthen the city with talents and strengthen the construction of a modern manufacturing base on the peninsula", with the strategic goal of retaining excellent talents for enterprises and based on the long-term development of the enterprise, it has the first "China's well-known" in China's construction machinery industry. Shandong Huaxia Group, a trademark, actively participated in the gold and blue collar training examination organized by the Municipal Human Resources and Social Security Bureau.   After more than 20 years of development, Huaxia Group has a group of skilled workers with excellent technical and professional qualities, especially welders, lathe workers, millers and other types of work. They have won awards in various skill competitions held by the Municipal Labor Bureau. In order to improve their salary and pay, and enable them to work stably in China for a long time, with the support of the company's leadership and the leadership of the human resources department, the skilled personnel of the tower crane workshops actively signed up and participated in the gold and blue collar training exam. After screening, a total of 65 people participated in the pre-training. Using spare time and rest time, everyone conducted more than two months of training at Huaxia Technical School without affecting the company's work. Through training, while consolidating the theoretical basic knowledge of the mechanics, they also learned practical knowledge that is not easily accessible in practical work, and strengthened the determination of employees to overcome technical problems in their future work.   At present, the first part of the practical skills test for the gold and blue collar exam has ended. All the employees who participated in our company have passed. The theoretical test results are also being announced. I believe that every employee involved can obtain his own senior technician certificate and become a company. The golden blue-collar collar, for the Huaxia Group to polish the real sword in the fierce market competition, to create high-quality products, but also for the grand goal of tens of billions of Huaxia at any time, sing the Huaxia Group's good voice together with the development and growth of the Huaxia Group!
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