Reed type shedding-proof inserted pin
An anti-falling, reed-type technology, applied in the direction of screws, nuts, bolts, etc., can solve the problems of unreliable connection, unreliable connection, easy to fall off, etc., and achieve a structure that is not easy to rotate and fall off, easy to disassemble and assemble, and simple in structure Effect
Inactive Publication Date: 2009-09-30
煤炭科学研究总院西安研究院
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- Abstract
- Description
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- Application Information
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Problems solved by technology
[0002] At present, most of the plug-in auger pipe pins are "U"-shaped pins. The "U"-shaped pins are easy to fall off during use, and the connection is not reliable; Simple structure, unreliable connection
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Embodiment Construction
[0014] A reed type anti-falling bolt, the bolt is arranged in the pin holes of two drill pipe joints; its structure is composed of three parts: a cylindrical pin 1, a reed 2 and a lock nut 3, and one end of the cylindrical pin 1 is connected to the lock The other end is set in the pin holes of the two drill pipe joints 4, and the two drill pipes are connected by the cylindrical pin 1, and the pulling force is transmitted to it; between the cylindrical pin 1 and the lock nut 3 Set the reed 2 to prevent the axial movement of the cylindrical pin 1, rely on the cooperation of the lock nut 3 and the cylindrical pin 1 to compress the reed 2, the tail end of the reed 2 is shaped to enclose the drill pipe joint, and prevent the cylindrical The pin falls off the arc.
[0015] The above cylindrical pin 1 is threaded at the end for connection with the lock nut 3; the diameter of the cylindrical pin 1 is 3-50 mm.
[0016] The plane end between the cylindrical pin and the lock nut of the ...
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Abstract
The invention relates to a reed type shedding-proof inserted pin. In the prior art, an inserted pin of a plug-in type spiral drilling rod is generally a U-shaped pin which is easy to shed off in the use process and has unreliable connection. In addition, a common cylindrical pin is used for driving, the mode of using an opening pin to prevent the shedding is adopted, and the cylindrical pin has simple structure but unreliable connection. The reed type shedding-proof inserted pin consists of a cylindrical pin (1), a reed (2) and a lock nut (3); two drilling rods are connected by the cylindrical pin (1) which transfers a feeding and pulling force. The reed (2) is compressed by the matching of the lock nut (3) and the cylindrical pin (2). The axial play of the cylindrical pin (1) is prevented by the reed (2). The rotation of the reed (2) is prevented by a notch plane of the lock nut (3). The reed type shedding-proof inserted pin has the characteristics of simple structure, difficulty in rotation and shedding, convenient assembly and disassembly and reliable connection.
Description
technical field [0001] The invention relates to drilling tools, in particular to a reed type fall-off prevention plug for auger drill rods. Background technique [0002] At present, most of the plug-in auger pipe pins are "U"-shaped pins. The "U"-shaped pins are easy to fall off during use, and the connection is not reliable; The structure is simple and the connection is not reliable. Contents of the invention [0003] The object of the present invention is to provide a reed type fall-off preventing plug for connecting auger rods which is convenient to operate, practical and reliable. [0004] In order to achieve the above object, the technical scheme adopted in the present invention is: [0005] A reed type anti-falling pin, the pin is arranged in the pin holes of two drill pipe joints; its special feature is that the pin is composed of three parts: a cylindrical pin 1, a reed 2 and a lock nut 3, and the One end of the cylindrical pin 1 is connected with the lock nut 3...
Claims
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Login to View More IPC IPC(8): E21B17/02F16B19/02F16B39/04
Inventor 龚城田东庄燕南飞牟培英彭腊梅许翠华
Owner 煤炭科学研究总院西安研究院