CN210262668U

CN210262668U - Prestressed steel anchor backing plate for preventing eccentricity of steel strand and corrugated pipe pore channel

Info

Publication number: CN210262668U
Application number: CN201920578039.XU
Authority: CN
Inventors: 蔡维好
Original assignee: Anhui Weihao Prestressing Equipment Co ltd
Current assignee: Anhui Weihao Prestressing Equipment Co ltd
Priority date: 2019-04-25
Filing date: 2019-04-25
Publication date: 2020-04-07
Anticipated expiration: 2029-04-25

Abstract

The utility model discloses a prevention steel strand wires and eccentric prestressing force steel anchor backing plate of bellows pore, including bottom plate, an extension section of thick bamboo and grout mouth, the grout mouth is 90 elbow structure, just the last port of grout mouth aligns and welds each other with the grout hole, the arc breach has been seted up to the bottom plate outward flange, just grout mouth lower extreme inserts in the arc breach and welds each other, extension section of thick bamboo upper end side direction extrusion has the outer enhancement of round arch, it is formed with spacing groove in the round to add the protruding inside of strengthening. And a circle of O-shaped limiting ring is tightly matched with the inner part of the inner limiting groove. The utility model provides a have the space between present extension section of thick bamboo and the bellows, can cause the eccentric problem of bellows pore and steel strand wires wherein, still can cause the hourglass thick liquid problem in the grout operation.

Description

Prestressed steel anchor backing plate for preventing eccentricity of steel strand and corrugated pipe pore channel

Technical Field

The utility model relates to an anchor backing plate technical field specifically is a prevention steel strand wires and eccentric prestressing force steel anchor backing plate of bellows pore.

Background

At present, the anchor backing plate used for the prestressed bridge is mainly made of an iron casting, the anchor backing plate of the iron casting is mainly made of HT200 gray cast iron, and the anchor backing plate is low in strength and only 200 MPa. Meanwhile, the surface quality of the iron casting is poor, and not only a small amount of air holes exist in the iron casting, but also other impurities are contained, so that the use performance of the iron casting is seriously reduced. In addition, the casting industry is a high-energy-consumption industry, the production efficiency is low, the market demand cannot be met, and the environment is seriously polluted. Therefore, a new road needs to be opened up to meet the wide demand of the market.

In addition, because the anchor backing plate need insert the bellows in its extension section of thick bamboo when using, and guarantee that steel strand wires extend to in the bellows, because the diameter of bellows is often less than the bore of an extension section of thick bamboo in the work progress, can not guarantee to prolong tight fit between a section of thick bamboo and the bellows and be connected, but there is certain space, so just can cause the eccentric problem of bellows pore and steel strand wires wherein, make steel strand wires atress uneven drawing the in-process, cause steel strand wires to buckle even easily, in addition, the gap between an extension section of thick bamboo and the bellows still can cause the hourglass thick liquid problem in the grout operation, the clearance to the later stage has increased the difficulty.

SUMMERY OF THE UTILITY MODEL

Technical scheme (I)

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a prevention steel strand wires and eccentric prestressing force steel anchor backing plate of bellows pore, includes bottom plate, an extension section of thick bamboo and grout mouth, bottom plate center stamping has the centre bore that matches with an extension section of thick bamboo aperture, the mounting hole has still been seted up to the bottom plate outward flange, an extension section of thick bamboo welding is at the bottom plate up end to guarantee centre bore and an extension section of thick bamboo hole coincidence, the grout hole that matches with grout mouth hole size is seted up to extension section of thick bamboo lower extreme lateral wall, the grout mouth is 90 elbow structure, just grout mouth upper end and grout hole align and mutual welding, the arc breach has been seted up to the bottom plate outward flange, just grout mouth lower extreme inserts in the arc breach and welds each other.

Preferably, the upper end of the extension cylinder is laterally extruded with a circle of external reinforcing protrusions.

Preferably, a circle of inner limiting groove is formed in the outer reinforcing protrusion.

Preferably, the longitudinal section of the inner limiting groove is of a conical structure, the height of the conical structure gradually decreases from one side close to the center of the longitudinal section to one side of the outer edge of the longitudinal section, a circle of O-shaped limiting ring is tightly matched with the inner part of the inner limiting groove, and the inner diameter of the O-shaped limiting ring is smaller than that of the extension cylinder.

Preferably, the inner wall of the O-shaped limiting ring is also distributed with a thread structure.

Preferably, the 90-degree elbow structure of the grouting nozzle is formed by mutually splicing and welding a horizontal steel pipe and a vertical steel pipe which are arranged at an angle of 45 degrees.

Preferably, the grouting nozzle and the extension cylinder are both formed by cutting seamless steel tubes.

(II) advantageous effects

The utility model provides a prevention steel strand wires and eccentric prestressing force steel anchor backing plate of bellows pore possesses following beneficial effect:

(1) the utility model forms a circle of external reinforcing bulges inside the extension cylinder by extruding and forming the upper end of the extension cylinder laterally, so that a circle of internal limiting groove is formed inside the extension cylinder, and a circle of O-shaped limiting ring is tightly matched in the inner limiting groove, so that the design can effectively enhance the use strength of the extension cylinder, meanwhile, the inner limiting groove can be additionally provided with an O-shaped limiting ring, after the corrugated pipe with the outer diameter smaller than the inner diameter of the extension cylinder is inserted into the extension cylinder, the O-shaped limiting ring can be tightly sleeved on the outer side of the corrugated pipe, thereby filling the gap between the corrugated pipe and the O-shaped spacing ring, so that the corrugated pipe pore canal and the steel strand penetrating through the corrugated pipe pore canal can not have the eccentric problem, therefore, the problems that the steel strand is stressed unevenly in the drawing process and even is easy to bend are effectively solved, the loss of prestress is effectively reduced, and in addition, the problem of slurry leakage caused by a gap between the extension cylinder and the corrugated pipe can be effectively solved;

in addition, the longitudinal section of the inner limiting groove is designed into a conical structure with the height gradually reduced from one side close to the center of the longitudinal section to one side of the outer edge, so that the tight fit effect between the O-shaped limiting ring and the inner limiting groove can be further enhanced, and in order to further enhance the connection effect between the corrugated pipe and the O-shaped limiting ring, the inner wall of the O-shaped limiting ring is also provided with a thread structure.

(2) The utility model discloses a to prolong a section of thick bamboo and grout mouth and all adopt the seamless steel pipe cutting of segmentation to form, it is different from the structural style of traditional ironcasting anchor backing plate, and need not to utilize the mould to pour fashioned reprocessing operation behind the pig iron melting, but utilize finished product seamless steel pipe welded shaping behind the direct cutting, thereby the processing period has been reduced greatly, the energy consumption has been reduced, the feature of environmental protection of course of working has been promoted, in addition, the toughness of seamless steel pipe than traditional ironcasting is good, the cracked problem is difficult to appear.

Drawings

Fig. 1 is a schematic view of the anchor backing plate of the present invention;

FIG. 2 is a schematic longitudinal sectional view of the extension cylinder of the present invention;

FIG. 3 is a schematic top view of the extension tube of the present invention;

fig. 4 is a schematic top view of the bottom plate of the present invention.

In the figure: the corrugated pipe comprises a bottom plate 1, a mounting hole 11, an arc notch 12, a central hole 13, an extension cylinder 2, an outer reinforcing protrusion 21, an inner limiting groove 22, a grouting hole 23, an O-shaped limiting ring 3, a grouting nozzle 4, a transverse steel pipe 41, a vertical steel pipe 42 and a corrugated pipe 5.

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. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1-4, the utility model provides a technical solution: the grouting device comprises a bottom plate 1, an extension cylinder 2 and a grouting nozzle 4, wherein a center hole 13 with the same aperture as that of the extension cylinder 2 is punched in the center of the bottom plate 1, a mounting hole 11 is further formed in the outer edge of the bottom plate 1, the extension cylinder 2 is welded on the upper end surface of the bottom plate 1, the center hole 13 is ensured to be coincided with an inner hole of the extension cylinder 2, a grouting hole 23 with the same size as that of the inner hole of the grouting nozzle 4 is formed in the side wall of the lower end of the extension cylinder 2, the upper end of the grouting nozzle 4 is aligned to and mutually welded with the grouting hole 23, an arc-shaped notch 12 is formed in the;

wherein, a grout mouth 4 and an extension section of thick bamboo 2 all adopt seamless steel pipe cutting to form, and is specific, and grout mouth 4 is 90 elbow structure, and the 90 elbow structure of grout mouth 4 is spliced each other the back welding by horizontal steel pipe 41 and the vertical steel pipe 42 that become 45 jiaos and set up and is constituteed.

The extension cylinder 2 and the grouting nozzle 4 are both formed by cutting segmented seamless steel pipes, the structural form of the extension cylinder is different from that of a traditional iron casting anchor backing plate, the reprocessing operation of casting and molding by using a mould after pig iron is melted is not needed, and finished seamless steel pipes are directly cut and then welded for molding, so that the processing period is greatly shortened, the energy consumption is reduced, the environmental protection performance of the processing process is improved, and in addition, the seamless steel pipes have better toughness than the traditional iron castings and are not easy to break;

a circle of outer reinforcing bulges 21 are formed at the upper end of the extension cylinder 2 in a lateral extrusion manner, and a circle of inner limiting grooves 22 are formed inside the outer reinforcing bulges 21; the longitudinal section of the inner limiting groove 22 is a conical structure with the height gradually reduced from one side close to the center to one side of the outer edge, a circle of O-shaped limiting ring 3 is tightly matched in the inner limiting groove 22, and the inner diameter of the O-shaped limiting ring 3 is smaller than that of the extension cylinder 2.

A circle of external reinforcing bulges 21 are formed by lateral extrusion at the upper end of the extension cylinder 2, so that a circle of internal limiting grooves 22 are formed inside the external reinforcing bulges, and a circle of O-shaped limiting ring 3 is tightly matched in the inner limiting groove 22, so that the design can effectively enhance the use strength of the extension cylinder 2, meanwhile, the inner limiting groove 22 can be additionally provided with an O-shaped limiting ring 3, after the corrugated pipe 5 with the outer diameter smaller than the inner diameter of the extension cylinder 2 is inserted into the extension cylinder 2, the O-shaped limiting ring 3 can be tightly sleeved outside the corrugated pipe 5, thus filling the gap between the corrugated pipe 5 and the O-shaped spacing ring 3, so that the hole of the corrugated pipe 5 and the steel strand penetrating through the hole do not have the eccentric problem, therefore, the problems that the steel strand is stressed unevenly in the drawing process and even is easy to bend are effectively solved, the loss of prestress is effectively reduced, and in addition, the problem of slurry leakage caused by a gap between the extension cylinder and the corrugated pipe can be effectively solved;

in addition, the longitudinal section of the inner limiting groove 22 is designed to be a conical structure with the height gradually decreasing from one side close to the center to the outer edge, so that the tight fit between the O-shaped limiting ring 3 and the inner limiting groove 22 can be further enhanced, and in order to further enhance the connection between the corrugated pipe 5 and the O-shaped limiting ring 3, the inner wall of the O-shaped limiting ring 3 is also distributed with a thread structure.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a prevention steel strand wires and eccentric prestressing steel anchor backing plate of bellows pore, includes bottom plate (1), an extension section of thick bamboo (2) and grout mouth (4), its characterized in that: bottom plate (1) center punching press has centre bore (13) equivalent with an extension section of thick bamboo (2) aperture, mounting hole (11) have still been seted up to bottom plate (1) outward flange, an extension section of thick bamboo (2) welding is at bottom plate (1) up end to guarantee centre bore (13) and an extension section of thick bamboo (2) hole coincidence, a extension section of thick bamboo (2) lower extreme lateral wall is seted up grouting hole (23) equivalent with grouting nozzle (4) hole size, grouting nozzle (4) are 90 elbow structure, just port aligns and welds each other with grouting hole (23) on grouting nozzle (4), arc breach (12) have been seted up to bottom plate (1) outward flange, just grouting nozzle (4) lower extreme inserts in arc breach (12) and welds each other.

2. The prestressed steel anchor backing plate for preventing eccentricity of a steel strand and a corrugated pipe pore passage according to claim 1, which is characterized in that: the upper end of the extension cylinder (2) is laterally extruded and formed with a circle of external reinforcing protrusions (21).

3. The prestressed steel anchor backing plate for preventing eccentricity of steel strands and corrugated pipe ducts according to claim 2, which is characterized in that: a circle of inner limiting groove (22) is formed inside the outer reinforcing protrusion (21).

4. The prestressed steel anchor backing plate for preventing eccentricity of steel strands and corrugated pipe ducts according to claim 3, wherein: the longitudinal section of the inner limiting groove (22) is of a conical structure, the height of the conical structure gradually decreases from one side close to the center of the conical structure to one side of the outer edge of the conical structure, a circle of O-shaped limiting ring (3) is tightly matched with the inner part of the inner limiting groove (22), and the inner diameter of the O-shaped limiting ring (3) is smaller than that of the extension cylinder (2).

5. The prestressed steel anchor backing plate for preventing eccentricity of steel strands and corrugated pipe ducts according to claim 4, which is characterized in that: and the inner wall of the O-shaped limiting ring (3) is also distributed with a thread structure.

6. The prestressed steel anchor backing plate for preventing the eccentricity of the steel strand and the corrugated pipe pore canal as claimed in any one of claims 1 to 5, wherein: the 90-degree elbow structure of the grouting nozzle (4) is formed by mutually splicing and welding a horizontal steel pipe (41) and a vertical steel pipe (42) which are arranged at an angle of 45 degrees.

7. The prestressed steel anchor backing plate for preventing the eccentricity of the steel strand and the corrugated pipe pore canal as claimed in any one of claims 1 to 5, wherein: the grouting nozzle (4) and the extension cylinder (2) are formed by cutting seamless steel tubes.