Shanghai Dirui obtained the product certification certificate of the first China engineering construction inspection and certification alliance

On November 13, 2018, the first China engineering construction inspection, testing and certification conference was grandly held in Beijing. The meeting was guided by the standard quota Department of the Ministry of housing and urban rural development and the certification and supervision department of the State Administration of market supervision, and jointly sponsored by China engineering construction inspection and certification alliance and the Certification Committee of China Engineering Construction Standardization Association.     The meeting was mainly held to promote the research on policies and systems of certification and accreditation in the field of housing and urban rural construction, the development of science and technology and standardization, and the acceptance of certification results. Use certification to stimulate the kinetic energy of project construction quality improvement, and promote the quality, efficiency and power reform of the construction industry.

2019-03-10

Shanghai Dirui participated in the seminar on the application of reinforcement and prestress technology in China's construction industrialization

The "seminar on the application of reinforcement and prestress technology in China's construction industrialization" and the "2014 annual meeting of reinforcement and prestress machinery branch of China Construction Machinery Industry Association" were grandly held in Beijing railway building from September 18 to 19, 2014. Chinese and foreign entrepreneurs, experts and scholars gathered together, Mr. Lai Zhiyong, chairman of Shanghai Dirui Reinforcing Project Co., Ltd, as vice president of China Construction Machinery Industry Association, was invited to participate with relevant personnel of the company.   The conference focused on the new prospect of China's future reinforcement mechanical connection, reinforcement machinery, reinforcement processing and distribution, prestressed machinery and its application technology

2014-09-20

What aspects should be paid attention to in the selection of reinforcement straight thread rolling machine

What aspects should be paid attention to in the selection of reinforcement straight thread rolling machine   Steel bar straight thread rolling machine is a steel bar processing machine widely used in construction industry in recent years. It rolls the end of the steel bar quickly and directly at one time, so as to produce cold hardening at the head of the wire texturing machine, so as to improve the strength and make the head of the steel bar equal to the base metal. It is composed of frame, clamping mechanism, feed carriage, reducer and thread rolling head, cooling system and electrical system.   With the continuous development of steel bar straight thread rolling machines in recent years, there are a variety of straight thread rolling machines on the market, and the quality is also uneven. When purchasing straight thread rolling machines, construction units,

2014-03-22

Classification and application of steel bar straight thread rolling machine

Steel bar straight thread rolling machine is a key equipment for rolling straight thread screw head of ribbed steel bar in construction engineering to realize steel bar straight thread connection. It can be clamped at one time to complete rib stripping and thread rolling. The reinforcement processed by the straight thread rolling machine can be closely and continuously connected with the straight thread metal fiber, and has good mechanical properties. The tensile strength can be increased by 20% - 30%, the fatigue strength can be increased by 40% - 60%, and the corrosion resistance can be increased by 50% - 200%. The connection strength and performance of the reinforcement processed by the straight thread rolling machine are higher than that of the reinforcement base metal, and the mechanical properties of the reinforcement joint meet and exceed the domestic and foreign standards.

2014-03-01

How to check and accept the reinforcement sleeve at the construction site

Steps for site acceptance of reinforcement sleeve:    1. When rolling straight thread joint is applied in the project, the technical provider shall submit effective formal inspection report.   2. At the beginning of reinforcement connection and during construction, the joint connection process inspection shall be carried out for each batch of mobilized reinforcement, and the process inspection shall meet the following requirements:   (1) The joint test pieces of each specification of reinforcement shall not be less than three;                  (2) Tensile strength test shall be conducted on the base metal of reinforcement of joint test piece;   (3) The tensile strength of the three joint specimens shall not be less than the standard value of the tensile strength of the grade of reinforcement, and shall not be less than

2014-02-15

Technical characteristics of steel bar connecting sleeve

Technical features of reinforcement connection sleeve: 1. It is suitable for reinforcement connection construction in reinforced concrete structures of various structures bearing tension and compression two-way forces. 2. Material saving and energy saving, not limited by the composition and type of reinforcement. 3. It can be connected in all directions. 4. It can be prefabricated in advance and industrialized, without occupying the construction period and all-weather construction. 5. The operation is convenient and fast, and the construction speed is fast, which can greatly shorten the construction period     Technical characteristics of reinforcement connecting sleeve joint strength meets the performance requirements of class a joint in the industry standard jgj107-96. Good thread shape, high precision and stable and reliable connection quality. Wide range of applications, suitable for diameter

2014-02-12

Specification for steel connecting sleeves

1、 Construction preparation 1. Material preparation: the reinforcement shall have factory certificate and mechanical property inspection report, and all inspection results shall comply with the provisions of current specifications and design requirements. The reinforcement connecting sleeve shall be provided with factory certificate, generally low-alloy steel or high-quality carbon structural steel, and its standard value of tensile bearing capacity shall be greater than or equal to 1.20 times of the standard value of the tensile bearing capacity of the connected reinforcement. The length of the reinforcement connecting sleeve shall be twice the diameter of the reinforcement. The reinforcement connecting sleeve shall be provided with a protective cover, and the specification of the sleeve shall be indicated on the protective cover. During transportation and storage, the reinforcement connecting sleeve shall be protected from corrosion and contamination, and the dimension deviation of the reinforcement connecting sleeve shall be

2014-01-22

Reinforcement mechanical connection project of North-South extension section of Shanghai Dirui Jiamin viaduct

On July 10, 2012, the new construction project of Jiamin elevated road (Xinsong road Lianming road and Beizhai road G2 Road) invested and constructed by the highway investment company subordinate to Shanghai Urban Investment started, and it is expected to be completed and opened to traffic in 2014. In the face of many bidders, Shanghai Dirui company stands out with its products of high quality and high price, and has become the final manufacturer of reinforcement connecting sleeve. Since its establishment ten years ago, Shanghai Dirui has created its own reputation with a down-to-earth and steady style and an honest and trustworthy attitude, and has become a leader in the field of reinforcement connection engineering in Shanghai and even East China.     In the North-South extension section of Jiamin elevated project, Shanghai Dirui produced

2013-12-10

Operating procedures for sleeve tapping machine

Operating procedures for sleeve tapping machine    1. Before operation, check whether the main locking bolts are firm and whether the power switch and circuit are in good condition. Wear labor protection articles as required,   Non tapping workers are forbidden to operate.   2. Before operation, lubricating oil and grease must be injected into the specified refueling parts. The machine can be operated only after it operates normally, flexibly and reliably.   3. Before tapping, the workpieces and tools to be tapped must be placed neatly and smoothly.   4. Adjust the tap size and depth tapped by the tapping machine to meet the required size before starting the operation. Prevent slippery teeth and insufficient teeth.   5. It is strictly forbidden to wear gloves during operation. Female employees with long hair,

2013-12-07

Classification of sleeve tapping machines

With the change from pressure welding to mechanical connection of reinforcement sleeve in the construction industry, sleeve tapping machine has become an ideal equipment for producing reinforcement straight thread sleeve. However, there are many kinds of sleeve tapping machines on the market, including the following:   1. Single shaft sleeve tapping machine, also known as vertical drilling sleeve tapping machine, is also the earliest prototype of sleeve tapping machine. It has been nearly ten years and is about to be eliminated by the market.   2. The double shaft sleeve tapping machine is improved on the basis of the single shaft sleeve tapping machine, and the time utilization is more reasonable. It is an ideal equipment in the semi-automatic sleeve tapping machine at present. Generally, the daily output of sleeve can reach 50

2013-12-07