Barb formula is faced frontier defense and is protected fixed fastener

The utility model provides a barb formula is faced frontier defense and is protected fixed fastener includes L type area silk pull rod and thimble assembly two parts, wherein the thimble assembly includes steel pipe, steel pipe sleeve pipe and limiting casing pipe, steel pipe sleeve pipe suit is on the steel pipe, limiting casing pipe and steel pipe sleeve pipe mutually perpendicular place and carry out the full weld at the contact point, it has a round hole to open on the steel pipe sleeve pipe, the welding of round hole position has the nut, the nut is furnished with the screw rod, L type area silk pull rod sets up in facing the limit entrance to a cave, the limiting casing pipe suit is at the lead screw end of L type area silk pull rod, just the lead screw end fastening of L type area silk pull rod has the nut. The utility model has the advantages of: originally, can have enough to meet the need use, green many times, the construction process is simple, and operation labour saving and time saving practices