Connecting joint device and prestress prefabricated member

Abstract

The invention provides a connecting joint device simple in structure, safe and reliable. The connecting joint device comprises an upper-section nut and a lower-section nut, wherein rib penetrating holes for clamping with rigid expansion heads are formed in the bottom parts of the upper-section nut and the lower-section nut; an inserting rod is in threaded connection to one end, far away from the rib penetrating hole, of the upper-section nut, and is provided with an inserting head; an elastic element, a buckling cylinder and a limited nut are sequentially arranged at one end, far away from therib penetrating hole, of the lower-section nut; the buckling cylinder comprises a clamping table and a base; and the clamping table is slidably connected with the base. The problem that due to a material problem, the inserting rod cannot open the clamping table, so that the instability in connection is caused is solved.

Description

technical field [0001] The invention relates to the technical field of building connectors, in particular to a connecting joint device and a prestressed prefabricated part comprising the connecting joint device. Background technique [0002] At present, most of the prefabricated piles used in building foundation uplift engineering adopt the form of end plate welding to connect piles with piles. Since this connection method belongs to electric welding, due to the uneven welding level of personnel, there may be certain potential safety hazards, which will affect the construction quality. For this reason, many enterprises have improved the connection method of piles to the direction of no end plate. [0003] For example, the literature retrieved by the applicant discloses a buckle cylinder, which includes a ring-shaped base, and a plurality of card structures with buckle functions are arranged at intervals along the circumferential direction on the base. On this basis, a conn...

AI Technical Summary

Problems solved by technology

However, the buckle barrel is composed of the bottom bracket and the card connected by the elastic sheet, and the material requirements of the card, the bottom bracket and the elastic sheet are different, because the card and the insertion rod need to bear the pull-out force, so the material hardness is required to be very high during design, and The base bracket and the elastic sheet do not have high hardness requirements, but the elastic sheet has toughness design requirements, and the card usually needs special quenching treatment. The physical properties such as toughness are different, and the processing difficulty and cost of the entire buckle barrel are very high. The usual practice is to uniformly process the entire buckle barrel according to the design requirements of the card. The lever cannot prop up the deck

[0005] In this way, when the connecting joint device is actually used, due to the high firmness and hardness of the elastic sheet, the insertion rod cannot stretch the card and form a fit with it, and the connection is unstable. This problem cannot be solved by the existing spring. If the spring is set If the setting is too hard, the card table cannot move downward, and if the card table does not move downward, the card table is restricted by the lock cylinder in the radial direction and cannot be opened, so the connection cannot be completed; if the spring setting is soft, the insertion rod will press against the buckle When the cylinder moves downward, due to the high rigidity of the elastic sheet, it often happens that the insertion rod has been inserted to the limit position, but the card is not opened, and the card and the insertion rod are not connected, so that there is no stable fastening between the prefabricated parts at all. Connection, which affects the reliability of the pile connection, resulting in a decrease in pull-out and tensile capacity

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