Rebar tensioner
A tensioner and steel bar technology, applied in building maintenance, construction, building construction, etc., can solve problems such as initial stress of new steel bars or difficulty in applying prestress, and achieve the effects of simple and reasonable structure, convenient use and safe operation
Active Publication Date: 2013-09-25
CCCC FOURTH HARBOR ENG INST +3
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Problems solved by technology
[0005] In order to solve the above practical problems and overcome the difficulty in restoring the initial stress of the new steel bars replaced or added during the maintenance and reinforcement construction of reinforced concrete structures or the difficulty in applying prestress in the prior art, a steel bar tensioner with a simple and reasonable structure and easy to use is provided
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[0020] Below in conjunction with specific accompanying drawing and embodiment the present invention will be further described
[0021] Such as figure 1 and figure 2 As shown, a steel tensioner includes a small regular hexagonal prism sleeve 1, a round head connecting bolt 2, a large regular hexagonal prism sleeve 3, a steel bar connecting nut 4, and auxiliary anchor nuts 11 and 14.
[0022] The small regular hexagonal prism sleeve 1 is a regular hexagonal prism, which can be screwed by a wrench. Its two ends are drilled with inner holes 5 and 6, wherein the inner hole 5 is deeper for connecting the first steel bar 9, and the inner hole 6 is shallower. For connecting round head connecting bolts 2. In order to tighten the threads at both ends simultaneously, the inner walls of the inner hole 5 and the inner hole 6 are respectively tapped with opposite threads, that is, the inner wall of one of the holes is tapped with a clockwise thread, and the inner wall of the other blind ...
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The invention relates to a rebar tensioner comprising a large regular-hexagonal-prism sleeve with a thread, a small regular-hexagonal-prism sleeve with a thread, a round head bolt for connecting the two sleeves, a rebar connecting nut with internal and external treads in the same direction, and two auxiliary anchor nuts assisting a jack in applying tension. The overall length of the tensioner is adjusted in a telescopic manner through one round head bolt capable of sliding in the large sleeve, so that two fixed rebars can be connected through the sleeves; the prestress is applied through the jack, and the prestress is used with a wrench tightening socket to tension the rebars. The rebar tensioner is mainly used for rebar replacement in maintenance and reinforcement projects of reinforced concrete beam structures. Through the rebar tensioner, the rebars can be tensioned, the due initial stress of the original rebars is restored, early crack is prevented for the structures under stress, maintenance and reinforcement construction quality is improved, and operation is safe, simple and fast. The rebar tensioner has the advantages of simple and reasonable structure, suitability for narrow space construction, avoidance of assistance of large-sized equipment, convenience in use and the like.
Description
technical field [0001] The invention relates to a steel bar tensioner, which belongs to the field of prestressed construction of civil engineering, in particular to a device for replacing steel bars in the maintenance and reinforcement construction of reinforced concrete beams, and tensioning the replaced steel bars to restore the initial stress of the original steel bars. technical background [0002] Reinforced concrete beam structures, especially reinforced concrete beam structures in the marine environment, are corroded and damaged under the action of chloride ion penetration, and need to be repaired and reinforced in time after the damage, and the steel bars with a remaining cross-sectional area of less than 80% after corrosion need to be replaced . Due to the self-weight of reinforced concrete beams, the original steel bars have initial stress, but the original stress of the replaced steel bars cannot be restored by welding or other mechanical connections, and ordina...
Claims
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Login to View More IPC IPC(8): E04G21/12E04G23/02
Inventor 岑文杰熊建波范志宏王胜年黄君哲
Owner CCCC FOURTH HARBOR ENG INST