CN215760015U

CN215760015U - A positioner that is used for vertical prestressing tendons of case web

Info

Publication number: CN215760015U
Application number: CN202121832427.XU
Authority: CN
Inventors: 刘成峰; 李雪峰; 杨松; 罗强; 张义斌
Original assignee: China Construction Civil Engineering Co Ltd
Current assignee: China Construction Civil Engineering Co Ltd
Priority date: 2021-08-06
Filing date: 2021-08-06
Publication date: 2022-02-08
Anticipated expiration: 2031-08-06

Abstract

The utility model discloses a positioning device for a vertical prestressed tendon of a box girder web plate, which comprises a sleeve joint part, a supporting part, a connecting part and a clamping part, wherein the sleeve joint part is arranged at the bottom of the sleeve joint part; the sleeve joint part is of an annular structure and is sleeved on the outer peripheral side of the end part of the vertical prestressed tendon; the supporting parts are a pair and are vertically arranged at the lower part of the sleeving part, and the connecting part is in threaded connection with the supporting parts; the clamping part is arranged at the lower end of the connecting part and is abutted against and fixed on the bottom rib of the box girder; the cross-section of joint portion is the U-shaped, its opening size with the external diameter phase-match of case roof beam base muscle. The positioning device for the vertical prestressed tendons of the box girder web plate, provided by the utility model, has the advantages of reasonable structure and convenience in operation, avoids the direct welding of the vertical prestressed tendons and the box girder bottom tendons, effectively protects the finish rolling threads at the end parts of the vertical prestressed tendons, and is favorable for improving the construction quality of the box girder structure.

Description

A positioner that is used for vertical prestressing tendons of case web

Technical Field

The utility model belongs to the technical field of constructional engineering, and relates to a positioning device for a vertical prestressed tendon of a box girder web.

Background

In the building engineering, the design form of the conventional large-span continuous beam body is a box beam structure, vertical prestressed ribs are designed on box beam webs, and a finish-rolled deformed steel bar is generally matched with a seamless steel pipe to serve as a vertical prestressed system; the vertical prestressed tendons need to be processed in advance and embedded in the web plate reinforcing steel bars, and during construction, accurate positioning is needed, and finish rolling deformed steel bars are protected from being damaged.

Therefore, it is needed to design a positioning device for a vertical prestressed tendon of a box girder web, which solves the technical problems existing in the prior art.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve at least part of technical problems in the prior art to a certain extent, and provides a positioning device for a vertical prestressed tendon of a box girder web, which has the advantages of reasonable structure and convenience in operation, avoids the direct welding of the vertical prestressed tendon and a box girder bottom tendon, effectively protects finish-rolled threads at the end part of the vertical prestressed tendon, and is beneficial to improving the construction quality of a box girder structure.

In order to solve the technical problems, the utility model provides a positioning device for a vertical prestressed tendon of a box girder web, which comprises a sleeve joint part, a supporting part, a connecting part and a clamping part, wherein the sleeve joint part is arranged at the bottom of the sleeve joint part; the sleeve joint part is of an annular structure and is sleeved on the outer peripheral side of the end part of the vertical prestressed tendon; the supporting parts are a pair and are vertically arranged at the lower part of the sleeving part, and the connecting part is in threaded connection with the supporting parts; the clamping part is arranged at the lower end of the connecting part and is abutted against and fixed on the bottom rib of the box girder; the cross-section of joint portion is the U-shaped, its opening size with the external diameter phase-match of case roof beam base muscle.

As a preferred embodiment, the socket part is formed by bending a round steel bar, and the support part is vertically welded to the socket part.

In a preferred embodiment, a plane of the axis of the supporting portion is disposed through the center of the socket portion.

As a preferred embodiment, the upper end of the connecting part is a hexagonal prism, which is provided with an internal thread.

As a preferred embodiment, the top end of the clamping portion is provided with a fixing hole, and the clamping portion is rotatably connected to the lower end of the connecting portion.

In a preferred embodiment, a stepped shaft is disposed at a lower end of the connecting portion, and a fixing hole of the engaging portion is fitted to the stepped shaft and fixed by a screw.

As a preferred embodiment, the inner diameter of the socket part is larger than the outer diameter of the vertical prestressed tendon.

As a preferred embodiment, a fastening nut is arranged at an end of the vertical prestressed tendon, and the outer diameter of the socket joint part is smaller than the outer contour size of the fastening nut.

As a preferred embodiment, the connection part is made of a non-metallic material.

As a preferred embodiment, the connection is made of polytetrafluoroethylene.

The utility model has the beneficial effects that:

the positioning device for the vertical prestressed tendons of the box girder web plate, provided by the utility model, has the advantages of reasonable structure and convenience in operation, avoids the direct welding of the vertical prestressed tendons and the box girder bottom tendons, effectively protects the finish rolling threads at the end parts of the vertical prestressed tendons, and is favorable for improving the construction quality of the box girder structure.

Drawings

The above advantages of the present invention will become more apparent and more readily appreciated from the detailed description set forth below when taken in conjunction with the drawings, which are intended to be illustrative, not limiting, of the utility model and in which:

FIG. 1 is a schematic structural diagram of a positioning device for a box girder web vertical prestressed tendon according to the present invention;

FIG. 2 is an exploded view of the corresponding positioning device of FIG. 1;

FIG. 3 is a schematic view showing the structure of a connection part provided with a screw at the lower part of the present invention;

FIG. 4 is a schematic structural view of the engaging portion of the present invention;

FIG. 5 is a schematic view of the positioning device of the present invention attached to the bottom ribs of a box girder;

FIG. 6 is a schematic view of one embodiment of the positioning device for the vertical prestressed tendons of the box girder web according to the present invention;

fig. 7 is a partially enlarged view of a rectangular broken line frame in fig. 6.

In the drawings, the reference numerals denote the following components:

10. a socket joint part; 20. a support portion; 30. a connecting portion; 40. a clamping part; 41. a fixing hole; 50. a box girder bottom rib; 60. vertical prestressed tendons; 61. and (5) tightening the nut.

Detailed Description

Fig. 1 to 7 are related schematic views of a positioning device for a box girder web vertical prestressed tendon according to the present application, and the present invention will be described in detail with reference to the following specific embodiments and the accompanying drawings.

The examples described herein are specific embodiments of the present invention, are intended to be illustrative and exemplary in nature, and are not to be construed as limiting the scope of the utility model. In addition to the embodiments described herein, those skilled in the art will be able to employ other technical solutions which are obvious based on the disclosure of the claims and the specification of the present application, and these technical solutions include technical solutions which make any obvious replacement or modification for the embodiments described herein.

The drawings in the present specification are schematic views to assist in explaining the concept of the present invention, and schematically show the shapes of respective portions and their mutual relationships. It is noted that the drawings are not necessarily to the same scale so as to clearly illustrate the structures of the various elements of the embodiments of the utility model. Like reference numerals are used to denote like parts.

The utility model discloses a structural schematic diagram of a positioning device for a box girder web vertical prestressed tendon, which is shown in figures 1 to 4. The positioning device for the vertical prestressed tendons of the box girder web comprises a sleeving part 10, a supporting part 20, a connecting part 30 and a clamping part 40; the sleeving part 10 is of an annular structure and is sleeved on the outer peripheral side of the end part of the vertical prestressed tendon 60 shown in fig. 6; the supporting parts 20 are a pair, the supporting parts 20 are vertically arranged at the lower part of the socket joint part 10, and the connecting part 30 is in threaded connection with the supporting parts 20; the clamping portion 40 is arranged at the lower end of the connecting portion 30 to be abutted against and fixed to a bottom rib 50 of the box girder shown in fig. 5; the cross section of the clamping portion 40 is U-shaped, and the opening size of the clamping portion is matched with the outer diameter of the box girder bottom rib 50.

Specifically, the lower extreme of supporting part 20 is configured with the screw thread, and connecting portion 30 can drive the joint portion 40 of its lower part and remove along vertical direction to adjust the vertical height of joint portion 40.

As an embodiment of the present invention, the socket part 10 is formed by bending a round steel bar, and the brace part 20 is vertically welded to the socket part 10. The plane of the axis of the strut 20 is disposed through the center of the socket 10.

In fig. 3, the upper end of the connecting portion 30 is a hexagonal prism, and is provided with an internal thread.

Further, the top end of the clamping portion 40 is provided with a fixing hole 41, and the clamping portion 40 is rotatably connected to the lower end of the connecting portion 30.

The lower end of the connecting portion 30 is provided with a stepped shaft, and the fixing hole 41 of the clamping portion 40 is sleeved on the stepped shaft and fixed by a screw. A fastening screw hole is provided in the stepped shaft at the lower portion of the connecting portion 30, and a screw fixes the snap portion 40 to the lower end of the connecting portion 30.

Fig. 6 is a schematic view of an embodiment of the positioning device for the box girder web vertical prestressed tendons according to the present invention, wherein the inner diameter of the socket part 10 is larger than the outer diameter of the vertical prestressed tendons 60. Further, the end portion of the vertical prestressed tendon 60 is provided with a fastening nut 61, and the outer diameter of the sleeve joint portion 10 is smaller than the outer contour size of the fastening nut 61, so that the finish-rolled threads at the end portion of the vertical prestressed tendon 60 are protected, and the finish-rolled threads are prevented from being damaged.

In order to avoid the adhesion between the metal and the metal due to long service time, the connecting portion 30 is made of non-metal material. Preferably, the connection portion 30 is made of teflon to ensure the number of uses of the positioning device. It will be appreciated that other non-metallic materials may be selected for the connection portion 30, such as polyethylene, for example.

In the utility model, the vertical position of the clamping part 40 can be adjusted through the connecting part 30, and the applicability of the positioning device is effectively improved. It will be appreciated that during field construction, the support portion 20 may also be welded directly to the box sill rib 50, as well as providing protection to the finish-rolled threads at the ends of the vertical tendons 60.

The following briefly describes the steps of use of the positioning device of the present invention:

in a reinforcing steel bar processing field, the positioning device is processed in advance and transported to the field; after the on-site box girder web plate reinforcing steel bars are installed, the vertical prestressed tendons 60 can be installed; the vertical prestressed tendons 60 are lowered from the middle of the web plate reinforcing steel bars to the bottom installation position by one person, the sleeve joint part 10 which is manufactured in advance is sleeved into the outer leakage part of the finish-rolled deformed steel bar by the other person at the bottom, the position of the clamping part 40 is adjusted through the connecting part 30, and the two clamping parts 40 and the box girder bottom ribs 50 are welded and fixed; meanwhile, the upper end of the vertical prestressed tendon 60 is fixed with the web steel bar by one person, binding wires can be adopted for binding and fixing, and the phenomenon that the threaded steel shakes to cause the bottom positioning welding to fall off due to the upper end is avoided.

Compared with the defects and shortcomings of the prior art, the positioning device for the vertical prestressed tendons of the box girder web plate, provided by the utility model, has the advantages of reasonable structure and convenience in operation, avoids the direct welding of the vertical prestressed tendons and the box girder bottom tendons, effectively protects the finish rolling threads at the end parts of the vertical prestressed tendons, and is favorable for improving the construction quality of the box girder structure.

The present invention is not limited to the above embodiments, and any other products in various forms can be obtained by the teaching of the present invention, but any changes in the shape or structure thereof, which are the same as or similar to the technical solutions of the present invention, fall within the protection scope of the present invention.

Claims

1. A positioning device for a vertical prestressed tendon of a box girder web is characterized by comprising a sleeve joint part, a supporting part, a connecting part and a clamping part; the sleeve joint part is of an annular structure and is sleeved on the outer peripheral side of the end part of the vertical prestressed tendon; the supporting parts are a pair and are vertically arranged at the lower part of the sleeving part, and the connecting part is in threaded connection with the supporting parts; the clamping part is arranged at the lower end of the connecting part and is abutted against and fixed on the bottom rib of the box girder; the cross-section of joint portion is the U-shaped, its opening size with the external diameter phase-match of case roof beam base muscle.

2. The positioning device as set forth in claim 1, wherein said socket portion is formed by bending a round reinforcing bar, and said support portion is welded perpendicularly to said socket portion.

3. The positioning device according to claim 2, wherein the plane of the axis of the support portion is disposed through the center of the socket portion.

4. The positioning device as set forth in claim 1, wherein the upper end of the connecting portion is a hexagonal prism provided with an internal thread.

5. The positioning device as set forth in claim 1, wherein a fixing hole is provided at a top end of the engaging portion, and the engaging portion is rotatably connected to a lower end of the connecting portion.

6. The positioning device as set forth in claim 5, wherein a stepped shaft is provided at a lower end of the connecting portion, and a fixing hole of the engaging portion is fitted around the stepped shaft and fixed by a screw.

7. The positioning device of claim 2, wherein the inner diameter of the socket portion is greater than the outer diameter of the vertical tendon.

8. The positioning device according to claim 7, wherein a fastening nut is arranged at the end of the vertical prestressed tendon, and the outer diameter of the socket part is smaller than the outer contour dimension of the fastening nut.

9. The positioning device of claim 1, wherein the connecting portion is made of a non-metallic material.

10. The positioning device of claim 9, wherein the connecting portion is made of polytetrafluoroethylene.