CN219637687U - Vertical prestressing force steel bar ground tackle of case roof beam - Google Patents

Abstract

The utility model discloses a box girder vertical prestress steel bar anchorage device, which comprises reserved grooves formed in the upper end and the lower end of a box girder, wherein an anchorage device is arranged at the bottom end in the reserved grooves, and is fixedly connected with the two ends of the steel bar device and used for fixedly fixing the steel bar device, applying tension to the steel bar device and keeping the prestress relatively stable; the utility model is provided with the limit sleeve and the elastic sleeve, the elastic sleeve is tightly pressed into the limit sleeve by the first rotary fastening nut, the outer side wall of the elastic sleeve is extruded under the action of the taper fit hole in the limit sleeve, the inner side wall of the elastic sleeve is tightly attached to the surface of the rod body, the end part of the rod body is positioned under the action of friction force and used for keeping prestress, and the second rotary fastening nut is matched, so that the stability of the prestress is ensured by adopting a double fastening structure.

Description

Vertical prestressing force steel bar ground tackle of case roof beam

Technical Field

The utility model relates to the technical field of bridge construction, in particular to a box girder vertical prestress steel bar anchorage device.

Background

The anchor means is a permanent anchor device used in prestressed concrete, and is an anchor tool for maintaining the tensile force of a prestressed tendon and transmitting the tensile force to the interior of the concrete in a post-tensioning structure or member, also called as a prestressed anchor, and is usually installed and fixed by using bolts and nuts in order to maintain the tensile force of a steel rod in the prior art, and the tensile force is born only by means of matched threads of the bolts and the nuts, so that the firmness is unreliable and the prestress loss is easy to cause.

The person skilled in the art therefore provides a box girder vertical prestressed steel bar anchor to solve the problems presented in the background art.

Disclosure of Invention

In order to solve the technical problems, the utility model provides a vertical prestress steel bar anchor for a box girder, which comprises a reserved groove formed in the upper end and the lower end of the box girder, wherein an anchor piece is arranged at the bottom end inside the reserved groove and is fixedly connected with the two ends of the steel bar piece and used for fixedly fixing the steel bar piece, and pulling force is applied to the steel bar piece to keep the prestress relatively stable.

Preferably: the steel rod piece comprises a rod body, a protective tube is sleeved on the outer side of the rod body, the protective tube is a metal threaded tube, and threaded ends are integrally arranged at two ends of the rod body.

Preferably: the anchor device comprises an anchor device which is embedded in a reserved groove, a plurality of cushion blocks are arranged on the outer side of the anchor device, a baffle is arranged on the other end of each cushion block, threaded holes are formed in the outer ends of the anchor devices between the cushion blocks, a limiting sleeve is connected with the threaded holes in a threaded mode, taper fit holes are formed in the middle of the limiting sleeve, an elastic sleeve is arranged in the taper fit holes, the outer ends of the elastic sleeve are in contact with a fastening nut I arranged on a threaded end, and the threaded end of a rod body penetrates through a through hole formed in the baffle and is connected with a fastening nut II in a threaded mode.

Preferably: the lower end of the embedded anchor seat is integrally provided with a limiting ring corresponding to the limiting sleeve, and the end part of the protection pipe is inserted into the inner side of the limiting ring.

Preferably: the lower end of the embedded anchor seat is provided with a spiral rib outside the limiting circular ring.

Preferably: the upper surface of the rod body is provided with anti-skid patterns corresponding to the elastic sleeve.

The utility model has the technical effects and advantages that:

compared with the prior art, the utility model has the beneficial effects that:

1. the utility model is provided with the limit sleeve and the elastic sleeve, the elastic sleeve is tightly pressed into the limit sleeve by the first rotary fastening nut, the outer side wall of the elastic sleeve is extruded under the action of the taper fit hole in the limit sleeve, the inner side wall of the elastic sleeve is tightly attached to the surface of the rod body, the end part of the rod body is positioned under the action of friction force and used for keeping prestress, and the second rotary fastening nut is matched, so that the stability of the prestress is ensured by adopting a double fastening structure.

Drawings

Fig. 1 is an installation state diagram of a box girder vertical prestress steel bar anchorage device provided by an embodiment of the utility model;

FIG. 2 is a block diagram of the view at A in FIG. 1;

fig. 3 is a structural diagram of an elastic sleeve in a box girder vertical prestress steel bar anchorage device provided by an embodiment of the utility model.

Wherein: the box girder 1, the reserved groove 11, the steel bar piece 2, the protective tube 21, the bar body 22, the threaded end 23, the anchor device 3, the embedded anchor seat 31, the baffle 32, the limit sleeve 33, the elastic sleeve 34, the first fastening nut 35, the second fastening nut 36, the cushion block 37 and the spiral rib 4.

Detailed Description

The present utility model will be described in further detail with reference to the following embodiments. The embodiments of the utility model have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the utility model in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments were chosen and described in order to best explain the principles of the utility model and the practical application, and to enable others of ordinary skill in the art to understand the utility model for various embodiments with various modifications as are suited to the particular use contemplated.

Example 1

Referring to fig. 1-3, in this embodiment, a vertical prestress steel bar anchor for a box girder is provided, which includes a reserved groove 11 formed at the upper end and the lower end of the box girder 1, an anchor member 3 is disposed at the bottom end inside the reserved groove 11, and the anchor member 3 is fastened to two ends of the steel bar member 2 and used for fastening and fixing the steel bar member 2, applying a tensile force to the steel bar member 2, and keeping the prestress relatively stable.

The steel rod 2 comprises a rod body 22, a protective tube 21 is sleeved outside the rod body 22, the protective tube 21 is a metal threaded tube, and threaded ends 23 are integrally arranged at two ends of the rod body 22. The anchor device 3 comprises an embedded anchor seat 31 arranged in the reserved groove 11, a plurality of cushion blocks 37 are arranged on the outer side of the embedded anchor seat 31, a baffle 32 is arranged at the other end of each cushion block 37, threaded holes are formed in the outer ends of the embedded anchor seat 31 between the cushion blocks 37, a limiting sleeve 33 is connected with threads in the threaded holes, a taper fit hole is formed in the middle of the limiting sleeve 33, an elastic sleeve 34 is arranged in the taper fit hole, the outer ends of the elastic sleeves 34 are in contact with a first fastening nut 35 arranged on the threaded end 23, and the threaded end 23 of the rod body 22 penetrates through a through hole formed in the baffle 32 and is in threaded connection with a second fastening nut 36. The lower end of the embedded anchor seat 31 is integrally provided with a limiting ring corresponding to the limiting sleeve 33, and the end part of the protection tube 21 is inserted into the inner side of the limiting ring. The lower end of the embedded anchor seat 31 is provided with a spiral rib 4 outside the limiting ring. The upper surface of the rod body 22 is provided with anti-slip patterns corresponding to the elastic sleeve 34, so that friction force is increased, when the novel self-locking rod is used, the fastening nut 36 is rotated, the rod body 22 is pulled towards the end to generate prestress, after the prestress meets the requirement, the second fastening nut 36 is stopped rotating, then the first fastening nut 35 is rotated to tightly press the elastic sleeve 34 into the limiting sleeve 33, the outer side wall of the elastic sleeve 34 is extruded under the action of a taper fit hole in the limiting sleeve 33, the inner side wall of the elastic sleeve 34 is tightly attached to the surface of the rod body 22, the end of the rod body 22 is positioned under the action of friction force, the prestress is maintained, a double-locking structure is adopted, and the stability of the prestress is ensured.

It will be apparent that the described embodiments are only some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art and which are included in the embodiments of the present utility model without the inventive step, are intended to be within the scope of the present utility model. Structures, devices and methods of operation not specifically described and illustrated herein, unless otherwise indicated and limited, are implemented according to conventional means in the art.

Claims (5)

1. The utility model provides a vertical prestressing steel bar ground tackle of case roof beam, includes reservation groove (11) of seting up both ends about case roof beam (1), and the inside bottom of reservation groove (11) sets up ground tackle spare (3), and the both ends of ground tackle spare (3) fastening connection steel bar spare (2) are used for fastening fixed steel bar spare (2), exert pulling force to steel bar spare (2), keep prestressing force stable relatively, a serial communication port, ground tackle spare (3) including setting up in the inside pre-buried ground tackle (31) of reservation groove (11), pre-buried ground tackle (31) outside sets up a plurality of cushion (37), and the other end of cushion (37) sets up baffle (32), pre-buried ground tackle (31) outer end sets up the screw hole between cushion (37), threaded hole threaded connection stop collar (33) are seted up the tapering mating hole in the middle part of stop collar (33), set up elastic sleeve (34) in the tapering mating hole, and the outer end of elastic sleeve (34) is connected and is set up fastening nut (35) on screw end (23), and two screw thread connection nuts (36) are seted up on baffle (32) are passed in screw end (23).

2. The vertical prestress steel bar anchorage device of a box girder according to claim 1, wherein the steel bar piece (2) comprises a bar body (22), a protection tube (21) is sleeved outside the bar body (22), the protection tube (21) is a metal threaded tube, and threaded ends (23) are integrally arranged at two ends of the bar body (22).

3. The vertical prestress steel bar anchorage device of a box girder according to claim 1, wherein a limit ring is integrally arranged at the lower end of the embedded anchorage device (31) corresponding to the limit sleeve (33), and the end part of the protection tube (21) is inserted into the inner side of the limit ring.

4. The vertical prestressed steel bar anchorage device for the box girder according to claim 1, wherein the lower end of the embedded anchorage device (31) is provided with a spiral rib (4) outside the limit ring.

5. A box girder vertical prestressed steel bar anchorage device according to claim 2, characterized in that the upper surface of the bar body (22) is provided with anti-skid patterns corresponding to the elastic sleeve (34).