CN210562978U

CN210562978U - External prestressing force structure of building roof beam

Info

Publication number: CN210562978U
Application number: CN201921261959.5U
Authority: CN
Inventors: 谢彬
Original assignee: Inner Mongolia Zhixin Construction Engineering Co Ltd
Current assignee: Inner Mongolia Zhixin Construction Engineering Co Ltd
Priority date: 2019-08-06
Filing date: 2019-08-06
Publication date: 2020-05-19
Anticipated expiration: 2029-08-06

Abstract

The utility model discloses an external prestressing force structure of building roof beam, including the building roof beam, fixed mounting has the fixed plate on the diapire of building roof beam, the even fixed mounting in bottom of building roof beam has four screw thread bracing pieces, and the top of screw thread bracing piece all runs through fixed plate and fixed mounting on the building roof beam, common mobile cover is equipped with the fly leaf on four screw thread bracing pieces, common fixed mounting has the jacking device between fixed plate and the fly leaf, and fixed mounting is on the diapire of fixed plate and the roof of fly leaf respectively at the both ends of jacking device, equal threaded connection has the nut on four screw thread bracing pieces, the bottom of fly leaf can be movable mounting downwards. The utility model discloses in evenly be equipped with a plurality of springs between fly leaf and mounting panel, after certain elongation appears in prestressing tendons, the spring compresses tightly prestressing tendons because recovering self elasticity can promote mounting panel and metal to the piece to further improve the reliability that external prestressing force structure used, reasonable in design.

Description

External prestressing force structure of building roof beam

Technical Field

The utility model relates to a building engineering technical field especially relates to an external prestressing force structure of building roof beam.

Background

The prestress is used for improving the service performance of a structure, compressive stress is applied to the structure in advance during construction, the compressive stress can completely or partially offset tensile stress caused by load during the service of the structure, the structure is prevented from being damaged, the prestress is commonly used for a concrete structure, and the prestress concrete structure is characterized in that before the structure bears the load, pressure is applied to the structure in advance, so that the compressive stress is generated by the internal force of concrete in a tension area when the structure bears the external load, the tensile stress generated by the external load is offset or reduced, and the structure does not crack or cracks later under the normal use condition.

Through retrieval, chinese patent No. CN208718417U discloses an external prestressed structure of a building beam, which comprises prestressed tendons and a tensioning device for tensioning the prestressed tendons, wherein the prestressed tendons are located below the building beam and both ends of the prestressed tendons are anchored, and the tensioning device is fixed in the building beam and located in the middle of the prestressed tendons and used for tensioning the prestressed tendons.

The existing external prestressed structure of the building beam has the following defects: when the prestressed tendon is deviated or has a certain elongation, the prestressed tendon is in a relaxed state, so that the in-vitro prestressed structure completely fails.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the problem that the external prestressed structure of the building beam completely loses efficacy after the prestressed tendon of the external prestressed structure of the building beam shifts or a certain elongation appears in the prior art, and the proposed external prestressed structure of the building beam.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

an external prestressed structure of a building beam comprises the building beam, wherein a fixed plate is fixedly arranged on the bottom wall of the building beam, four threaded supporting rods are uniformly and fixedly arranged at the bottom end of the building beam, the top ends of the threaded supporting rods penetrate through the fixed plate and are fixedly arranged on the building beam, a movable plate is movably sleeved on the four threaded supporting rods, a jacking device is fixedly arranged between the fixed plate and the movable plate, two ends of the jacking device are fixedly arranged on the bottom wall of the fixed plate and the top wall of the movable plate respectively, nuts are connected on the four threaded supporting rods in a threaded manner, a mounting plate is movably arranged at the bottom end of the movable plate downwards, a prestressed rib is connected at the bottom end of the mounting plate, two ends of the prestressed rib are anchored, a plurality of metal supporting blocks matched with the prestressed rib are uniformly and fixedly arranged on the bottom wall of the mounting plate, every all be equipped with the stop device who mutually supports with the prestressing tendons on the metal supports the piece, even demountable installation has a plurality of springs between fly leaf and the mounting panel, be equipped with safety device between fly leaf and the mounting panel.

Preferably, each metal abutting block is provided with a clamping groove which is in clearance fit with the prestressed tendons.

Preferably, the limiting device comprises a limiting plate which is attached to the metal abutting block and matched with the prestressed tendon, a plurality of first fastening screws are evenly inserted into the outer side wall of one side of the limiting plate, and the first fastening screws penetrate through the limiting plate and are in threaded connection with the metal abutting block.

Preferably, both ends of each spring are fixedly provided with a connecting plate, a plurality of second fastening screws are inserted into the outer side wall of one side of each connecting plate opposite to each other at equal distances, and the second fastening screws penetrate through the connecting plates and are respectively in threaded connection with the movable plate or the mounting plate.

Preferably, safety device includes a plurality of gag lever posts of fixed mounting on the fly leaf diapire, and the bottom of gag lever post all contacts each other with the top of mounting panel.

Compared with the prior art, the utility model discloses there is following beneficial effect:

1. the metal abutting block is provided with a clamping groove which is in clearance fit with the prestressed tendon and a limiting device which is in fit with the prestressed tendon, so that the prestressed tendon can be prevented from deviating, the prestressed tendon can be prevented from being in a loose state, and the use stability of the external prestressed structure is improved;

2. evenly be equipped with a plurality of springs between fly leaf and mounting panel, after certain elongation appears in prestressing tendons, the spring can promote mounting panel and metal support piece and compress tightly prestressing tendons owing to resume self elasticity to further improve the reliability that external prestressing force structure used, reasonable in design.

Drawings

Fig. 1 is a schematic front structural view of an external prestressed structure of a building beam according to the present invention;

fig. 2 is a schematic structural view of a metal supporting block part of an external prestressed structure of a building beam according to the present invention;

fig. 3 is an enlarged view of a portion a of the external prestressed structure of the building beam according to the present invention.

In the figure: 1 building beam, 2 fixed plates, 3 threaded supporting rods, 4 movable plates, 5 jacking devices, 6 nuts, 7 mounting plates, 8 prestressed tendons, 9 metal abutting blocks, 10 clamping grooves, 11 limiting plates, 12 first fastening screws, 13 springs, 14 connecting plates, 15 second fastening screws and 16 limiting rods.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

Referring to fig. 1-3, an external prestressed structure of a building beam comprises a building beam 1, a fixed plate 2 is fixedly installed on the bottom wall of the building beam 1, four threaded support rods 3 are uniformly and fixedly installed at the bottom end of the building beam 1, the top ends of the threaded support rods 3 all penetrate through the fixed plate 2 and are fixedly installed on the building beam 1, a movable plate 4 is movably sleeved on the four threaded support rods 3, a jacking device 5 is fixedly installed between the fixed plate 2 and the movable plate 4, two ends of the jacking device 5 are respectively and fixedly installed on the bottom wall of the fixed plate 2 and the top wall of the movable plate 4, nuts 6 are respectively in threaded connection with the four threaded support rods 3, a mounting plate 7 is movably installed at the bottom end of the movable plate 4 downwards, a prestressed rib 8 is connected with the bottom end of the mounting plate 7, two ends of the prestressed rib 8 are anchored, a plurality of metal abutting blocks 9 mutually matched with the prestressed rib 8 are, every metal supports and all has seted up the draw-in groove 10 with the mutual clearance fit of prestressing tendons 8 on the piece 9, be convenient for connect prestressing tendons 8 on metal supports and to piece 9, every metal supports and all is equipped with the stop device who mutually supports with prestressing tendons 8 on the piece 9, stop device supports the limiting plate 11 of mutually supporting with prestressing tendons 8 on the piece 9 including pasting, evenly insert on the lateral wall of limiting plate 11 one side and be equipped with a plurality of first fastening screw 12, and first fastening screw 12 all runs through limiting plate 11 and threaded connection on metal supports and to piece 9, can prevent prestressing tendons 8 from taking place the skew, thereby can avoid prestressing tendons 8 relaxation state to appear, the stability of external prestressing force structural use has been improved.

Even demountable installation has a plurality of springs 13 between fly leaf 4 and the mounting panel 7, the equal fixed mounting in both ends of every spring 13 has connecting plate 14, impartial distance is inserted on the lateral wall of the relative one side of two connecting plates 14 and is equipped with a plurality of second fastening screw 15, and second fastening screw 15 all runs through connecting plate 14 and difference threaded connection on fly leaf 4 or mounting panel 7, after certain elongation appears in prestressing tendons 8, spring 13 can promote mounting panel 7 and metal to support piece 9 and compress tightly prestressing tendons 8 owing to resume self elasticity, thereby further improved the reliability that external prestressing force structure used, and reasonable in design, can be convenient install the dismantlement to spring 13, thereby can in time change the spring 13 that loses efficacy, and reasonable design.

Be equipped with safety device between fly leaf 4 and the mounting panel 7, safety device includes a plurality of gag lever posts 16 of fixed mounting on the 4 diapire of fly leaf, and the bottom of gag lever post 16 all contacts with the top of mounting panel 7 each other, and gag lever post 16 can prevent to lead to prestressing tendons 8 to appear relaxing after mounting panel 7 upwards removes.

The utility model discloses in, connect prestressing tendons 8 respectively in the draw-in groove 10 that corresponds, drive jacking device 5 promotes fly leaf 4 downwards, gag lever post 16, mounting panel 7 and metal are supported piece 9 and are compressed tightly prestressing tendons 8, then install limiting plate 11 respectively on metal is supported piece 9 and make limiting plate 11 be located prestressing tendons 8's the outside, after certain elongation appears in prestressing tendons 8, spring 13 is owing to resume self elasticity can promote mounting panel 7 and metal and support piece 9 and compress tightly prestressing tendons 8.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. The utility model provides an external prestressing force structure of building roof beam, includes building roof beam (1), fixed mounting has fixed plate (2) on the diapire of building roof beam (1), the even fixed mounting in bottom of building roof beam (1) has four screw thread bracing pieces (3), and the top of screw thread bracing piece (3) all runs through fixed plate (2) and fixed mounting on building roof beam (1), four common cover is equipped with portable fly leaf (4) on screw thread bracing piece (3), common fixed mounting has jacking device (5) between fixed plate (2) and fly leaf (4), and the both ends of jacking device (5) respectively fixed mounting on the diapire of fixed plate (2) and the roof of fly leaf (4), four equal threaded connection has nut (6), its characterized in that on screw thread bracing piece (3): the bottom of fly leaf (4) can have mounting panel (7) to movable mounting down, the bottom of mounting panel (7) is connected with prestressing tendons (8), and the both ends of prestressing tendons (8) all are anchored, even fixed mounting has a plurality of and prestressing tendons (8) metal of mutually supporting to piece (9), every on the diapire of mounting panel (7) the metal supports and all is equipped with the stop device who mutually supports with prestressing tendons (8) on piece (9), even demountable installation has a plurality of springs (13) between fly leaf (4) and mounting panel (7), be equipped with safety device between fly leaf (4) and mounting panel (7).

2. An external prestressed structure of construction beam defined in claim 1, wherein: each metal abutting block (9) is provided with a clamping groove (10) which is in clearance fit with the prestressed tendon (8).

3. An external prestressed structure of construction beam defined in claim 1, wherein: limiting device supports limiting plate (11) of mutually supporting with prestressing tendons (8) including pasting to establish on piece (9) are supported to the metal, evenly insert on the lateral wall of limiting plate (11) one side and be equipped with a plurality of first fastening screw (12), and first fastening screw (12) all run through limiting plate (11) and threaded connection on piece (9) are supported to the metal.

4. An external prestressed structure of construction beam defined in claim 1, wherein: every equal fixed mounting in both ends of spring (13) has connecting plate (14), two equal distance is inserted on the lateral wall of the relative one side of connecting plate (14) and is equipped with a plurality of second fastening screw (15), and second fastening screw (15) all run through connecting plate (14) and difference threaded connection is on fly leaf (4) or mounting panel (7).

5. An external prestressed structure of construction beam defined in claim 1, wherein: the safety device comprises a plurality of limiting rods (16) fixedly mounted on the bottom wall of the movable plate (4), and the bottom ends of the limiting rods (16) are in mutual contact with the top end of the mounting plate (7).