来源： 最后更新时间：2025-02-11 15:11:12 人气：114329

Reinforcement sleeve connection, also known as reinforcement joint: a connector used to connect steel bars and having internal threads corresponding to the thread of the wire head.

Simple construction process: Use rolling technology to process the ends of the steel bars into straight threads, and use corresponding connecting sleeves to connect the two steel bars to each other.

There are six types of steel sleeve: straight thread sleeve, split sleeve, grouting sleeve, pier coarse sleeve, cold extrusion sleeve, and weldable sleeve.

Straight threaded sleeves are cylindrical steel sleeves with internal threads, divided into two types: equal diameter sleeves and variable diameter sleeves. When connecting the steel bars, directly screw the threaded joints of the two steel bars into both ends to complete the connection of the steel bars. The use of a straight threaded sleeve connection requires rotation of the steel bars.

Split type sleeve, consisting of two symmetrical semi cylindrical sleeves with outer conical surfaces and two locking sleeves with inner conical surfaces. The outer diameter of the semi cylindrical sleeve decreases from the middle to both ends. When connecting, fit the two halves of the sleeve with an outer conical surface at the joint of the two steel bars, so that they are interlocked with the steel bar threads. Finally, fasten the locking buckles of the two inner conical surfaces from both ends to complete the connection of the steel bars. The use of split type sleeves can connect non rotating steel bars that have already been formed or pre embedded.

Grouting sleeve is a sleeve composed of one grouting port and one discharge port, which is divided into semi grouting type and full grouting type. When connecting steel bars, grouting material is injected and the bonding and biting force between materials are used to connect the steel bars. Grouting sleeves are suitable for connecting small spaces such as prefabricated concrete structures.

The rough sleeve of the pier is connected by first using a rough processing machine to rough one end of the steel bar, and then using a threading machine to thread the rough section of the pier. The overall steel bar connection is formed by interlocking the specially designed straight thread at the end of the steel bar with the rough sleeve of the pier.

Cold extrusion sleeve is a type of sleeve without internal threads. When connecting, the cold extrusion sleeve is wrapped around the two ends of the joint of two steel bars and placed in a dedicated pressure equipment. According to the specified pressure and indentation, the sleeve undergoes plastic deformation through pressure to connect the two steel bars together.

Pre embedded sleeve, also known as threaded steel sleeve or suspension pile sleeve, is used to be pre embedded into the construction, so that a special lifting device can be used in conjunction with the threaded steel sleeve to complete the lifting function during lifting. The threaded steel sleeve is made of HRB400 material threaded steel.

Weldable steel bar sleeve is a steel bar connection sleeve between rigid steel columns, mainly used for steel bar connection construction between large steel columns and frame beams. The principle of its connection process is that the sleeve used for connection has weldability, which can easily achieve welding connection with the steel column. Due to the processing of the connecting sleeve having internal threads that can match the external threads of the steel bar end, it is convenient to achieve the connection between the frame beam reinforcement and the frame beam.

National standard size parameters, with steel stamp by default. If you need other sizes, please contact us for clarification. Company: mm

Process flow of steel bar rolling straight thread connection:

Steel bar cutting → thread rolling → thread head inspection → on-site thread connection

Operation process:

The steel bar rolling straight thread connection uses a specialized rolling machine to roll the end of the steel bar, and the thread is formed in one go. The steel bars are rolled and threaded, and the material at the bottom of the thread is not cut off, but squeezed out, increasing the original diameter. After rolling, the material of the thread hardens, increasing its strength by about 6% -8%, greatly reducing the weakening of the thread on the base material. Its tensile strength is 97% - of the base material, and its strength performance is very stable.

Quality requirements for sleeves

① The surface of the connecting sleeve is free of cracks, the threads are full, and there are no other defects.

② The tooth profile specification inspection is qualified, and the dimensional accuracy is checked using a straight thread plug gauge.

③ The outer surface of connection sleeves of various models and specifications must have clear steel bar grades and diameters.

④ The holes at both ends of the connecting sleeve must be sealed with plastic covers to keep the interior clean and rust proof.

Key points of process operation

1) Reinforcement thread processing

① The thread head, tooth shape, pitch, etc. used for processing steel bar threads must be consistent with the tooth shape and pitch of the connecting sleeve, and must be inspected and qualified by the matching gauge.

② When processing steel bar threads, water-soluble cutting lubricants should be used; When the temperature is below 0 ℃, 15% -20% sodium nitrite should be added, and oil should not be used as lubricant or threaded without lubricant.

③ The operator should inspect the appearance quality of the steel wire heads one by one and make operator markings.

④ The steel wire heads that have passed self inspection should be randomly sampled for 10% of the processing quantity of each specification, and not less than 10 pieces. If one of them is unqualified, the entire processing batch should be inspected. The unqualified wire heads should be reworked and can be used after passing the re inspection.

⑤ The qualified thread ends that have been inspected should be protected with protective caps and neatly classified according to specifications for future use.

2) Steel bar connection

① When connecting steel bars, the specifications of the steel bars should be consistent with those of the connecting sleeve, and the type, pitch, and outer diameter of the steel bar threads should match those of the connecting sleeve. And ensure that the threads of the steel bar connection sleeve are clean and intact.

② When connecting steel bars, they should be aligned with the axis and screwed into the connecting sleeve.

③ After the joint splicing is completed, the two thread heads should be tightly pressed against each other at the center of the sleeve. There should not be more than one complete thread exposed at each end of the sleeve. The number of exposed threads for extended joints is not limited, but there is a clear mark to check whether the length of the thread head entering the sleeve meets the requirements

Specification and Dimensional Parameters Table for Reinforcement Sleeve Connection
规格	外径	长度	内孔	牙型角	螺距
12MM	19	35	11	75	2.5
14MM	21	35	11.7	75	2.5
16MM	24	40	14.7	75	2.5
18MM	27	45	16.5	75	2.5
20MM	30	50	18.5	75	2.5
22MM	32.5	55	20.5	75	2.5
25MM	37	60	23.5	75	3
28MM	41	65	26.5	75	3
32MM	47	75	30.3	75	3
36MM	53	85	34.5	75	3
40MM	58	90	37.5	75	3
National standard size parameters, with steel stamp by default. If you need other sizes, please contact us for clarification. Company: mm

If the customer does not provide a definite type and specification of the sleeve, the customer should correctly explain their type, specification, and requirements, and sign the contract under the condition of mutual understanding between the supply and demand parties。

　1、The customer communicated the product type, specifications, and dimensions to our salesperson。

　2、Received customer specifications and dimensions, provided sleeve quotation (price list) for the customer。

　3、Specific agreement: delivery time, special requirements, and other matters。

　4、After placing the order and making payment, our company will arrange shipment as soon as possible。

Steel bar stripping rib rolling straight thread connection is a new type of steel bar connection sleeve technology. Its structural principle is to strip off a part of the longitudinal and transverse ribs at the end of the steel bar to be connected by cutting, and then roll them directly into ordinary straight threads, and connect them with a special straight thread steel bar connection sleeve to form a steel bar connection.

The advantages of this connection method are as follows:

Good mechanical performance and safe and reliable connection: Due to the rolling forming of the steel bar end and the cold working treatment of the steel bar material, the strength of both the thread and the steel bar has been improved, which compensates for the influence of the thread bottom diameter being smaller than the diameter of the steel bar base material on the strength weakening, making the joint strength of the connection higher than the strength of the base material, and enabling the base material to fully exert its strength and ductility.

Convenient connection: It can be flexibly operated in areas with dense steel reinforcement arrangement in narrow spaces. Convenient and efficient construction: The steel bar connection sleeve is prefabricated in the factory, with quality assurance. The on-site rolling wire head equipment can process nearly 400 joints per shift, which has unparalleled advantages in large-scale projects and basement floor construction. There is no pollution or open flame operation during construction, and it is safe and environmentally friendly. It can be constructed 24/7.

Easy to detect: No specific testing equipment is required during construction, only the exposed wire teeth of the steel bars can be used to determine the quality of the joints. Strong applicability: Suitable for steel bar connections in all seismic and non seismic reinforced concrete structures, and applicable to bent steel bars, fixed steel bars, steel cages, ultra long steel bars, and non rotating situations.

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