CN215978480U - Expanding hook bolt - Google Patents

Abstract

The utility model discloses an expansion type hook bolt which comprises a hook bolt, a high-strength pull rod, a square steel pipe and an airfoil nut; the hook bolt is welded with one end of the high-strength pull rod; a round hole is formed in the middle of the square steel pipe, so that the high-strength screw rod penetrates through the round hole in the square steel pipe, and then the wing-shaped nut is screwed in (at the other end of the high-strength pull rod). During the use, the horizontal steel of gib head bolt hanging on the template system encloses the purlin, and the high-strength pull rod passes and encloses the middle of the purlin double-channel steel, makes it pass the hole of opening in the middle of the square steel pipe with the vertical owner that the demolding device is connected, screw in wing section nut again. The utility model has the advantages that the stress surface of the hook bolt contacted with the horizontal steel purlin changes according to different stresses, the hook bolt is intensively stressed in the design and has larger section size to bear larger pulling force, and the contact area of the hook bolt is larger at the contact part of the hook bolt and the horizontal steel purlin, thereby greatly reducing the damage to the horizontal steel purlin.

Description

Expanding hook bolt

Technical Field

The utility model relates to a connecting and fixing structure of a creeping formwork stripping device.

Background

The creeping formwork system is an important formwork system for vertical concrete structure construction, and has been widely used in various vertical concrete structure constructions of hydropower stations, bridge towers, high-rise buildings and the like due to the advantages of large bearing capacity, high construction speed, simple and convenient construction operation, good formwork integrity, good concrete forming quality and the like. The system finally transmits various loads to the surface of a poured concrete structure through the anchoring points of the creeping formwork supports and the supporting legs, and plays a key role in construction safety, construction efficiency and project progress control. When the template system and the demolding device need to be movably connected and fixed, a device is needed to achieve the effect. Traditional gib head bolt adopts round steel bending or thick steel plate cutting process to form usually, and in the connection process, because of the gib head contact surface is little, stress concentration leads to the template to connect the position easily and produces the deformation. The expansion hook bolt specially designs the hook head into an expansion surface at the connection part, and increases the contact area of the hook head and the connecting piece so as to solve the deformation problem of the pull-connection part.

Disclosure of Invention

In view of this, the present invention provides a device for connecting a vertical main purlin and a horizontal steel purlin.

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

the utility model relates to an expansion type hook bolt, which is characterized in that: comprises a hook bolt (1), a high-strength pull rod (2), a square steel pipe (3) and an airfoil nut (4); high-strength pull rod (2) with expanding gib head bolt (1) fixed connection, square steel pipe (3) cover is on high-strength pull rod (2), and wing section nut (4) cover is in high-strength pull rod (2) and compress tightly square steel pipe (3).

Preferably, the hook bolt (1) comprises a hook head 11 and an expansion surface 12, wherein the hook head 11 is in a hook shape, and the expansion surface 12 surrounds the hook head 11 and is perpendicular to the surface of the hook head 11.

Preferably, the high-strength screw (2) is meshed with the wing-shaped nut (3) through threads.

The utility model has the beneficial effects that: 1. the expansion type hook bolt can bear larger pulling force under the condition of greatly reducing the damage to the horizontal steel enclosing purlin, and improves the safety. 2. The expansion hook bolt can be flexibly adjusted and connected with the die stripping device and the die plate, and convenience is improved. 3. The expansion type hook bolt can adapt to templates of various sizes, and is strong in universality, good in economical efficiency, convenient and simple to operate and capable of saving material resources and manpower.

In conclusion, the structure of the utility model well solves the inconvenience and difficulty of the creeping formwork system in the installation operation, simplifies the field construction process and improves the convenience and the safety of the field construction.

Drawings

In order to make the object, technical scheme and beneficial effect of the utility model more clear, the utility model provides the following drawings for explanation:

fig. 1 is a schematic structural view of the present invention.

Fig. 2 is a perspective view of the expanding hook bolt of the present invention.

Fig. 3 is a usage diagram of the utility model.

Description of the symbols:

an expanding hook bolt-1; hook head-11; an expansion surface-12; a high-strength pull rod-2; a square steel tube-3; wing nut-4.

Detailed Description

The present invention is further described with reference to the following drawings and specific examples so that those skilled in the art can better understand the present invention and can practice the present invention, but the examples are not intended to limit the present invention.

As shown in fig. 1, the expanding hook bolt of the present invention comprises an expanding hook bolt 1, a high-strength pull rod 2, a square steel tube 3 and a wing nut 4. The hook bolt 1 is welded with one end of the high-strength screw rod 2, a through hole is formed in the square steel tube 3, the high-strength screw rod 2 penetrates through the hole formed in the square steel tube 3, and then the wing-shaped nut 4 is screwed in. Wherein the hook bolt 1 is in an expanded hook shape. The template steel enclosing purlin can be hooked, and a larger contact surface with the steel enclosing purlin is guaranteed. The high-strength screw rod 2 is of a strip-shaped structure. The high-strength screw rod 2 is meshed with the wing-shaped nut 4 through threads.

As shown in fig. 2, the hook bolt 1 includes a hook 11 and an expanded surface 12, the hook 11 is in a hook shape, and the expanded surface 12 surrounds the hook 11 and is perpendicular to a surface on which the hook 11 is located.

As shown in figure 3, when the combined type square steel pipe column is used, the expansion type hook head bolt 1 hooks the horizontal steel enclosing purlin of the template, the high-strength pull rod 2 penetrates through the middle of the vertical main enclosing purlin, the square steel pipe 3 is sleeved on the high-strength pull rod 2 through a hole formed in the upper surface of the square steel pipe, and then the square steel pipe is screwed into the wing-shaped nut 4 and is screwed tightly. After the creeping formwork system is installed in place, the wing nut 4 can be loosened according to the design size of the formwork to adjust the formwork up and down, and the wing nut 4 is screwed down to fix the formwork when the formwork is adjusted to a reasonable position (the height adjusting piece is used for adjusting the position of the formwork, and the expansion hook head bolt does not provide support for the vertical gravity of the formwork and only plays a role in connecting the formwork and the demolding device in the horizontal direction).

The stress surface that gib head bolt 1 encloses the purlin contact with horizontal steel changes according to the atress difference, and expanding gib head bolt 1 has concentrated the atress part in the design and has done the enhancement processing, and it is bigger through design cross sectional dimension, can bear bigger pulling force, encloses the contact site of purlin at gib head bolt 1 and horizontal steel, and the area of contact of expansion face 12 is bigger to the very big reduction encloses the damage of purlin to horizontal steel.

The expanding hook bolt of the utility model has the following advantages: 1. the damage to the horizontal steel enclosing purlin is reduced, the concentrated stress part is reinforced, and the horizontal steel enclosing purlin is safer and more reliable; 2. the components are convenient to obtain, and the processing and the manufacturing are simple; 3. the components are simple to install and use, and the trouble of field construction is reduced; 4. the design is ingenious, and the small parts can play a key role in firmly connecting the template and the demolding device.

The device simple manufacture technology, convenient to use, the transportation of part and storage management are simple and convenient, have saved the plenty of time of creeping formwork system when equipment and use, and the flexibility is strong, has certain practicality and economic nature.

In conclusion, the structure of the utility model well solves the difficulty of the creeping formwork system in concrete construction, simplifies the site construction process and improves the convenience and safety of site construction.

The above-mentioned embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. The equivalent substitution or change made by the technical personnel in the technical field on the basis of the utility model is all within the protection scope of the utility model. The protection scope of the utility model is subject to the claims.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, when used in the orientation or positional relationship indicated in the figures, are used merely for convenience in describing the utility model and to simplify the description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered as limiting. Furthermore, the appearances of the terms "first," "second," and the like, if any, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" should be interpreted broadly, e.g., as being fixed or detachable or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

Claims (3)

1. An expansion gib head bolt which is characterized in that: comprises a hook bolt (1), a high-strength pull rod (2), a square steel pipe (3) and an airfoil nut (4); high-strength pull rod (2) with gib head bolt (1) fixed connection, square steel pipe (3) cover is on high-strength pull rod (2), and wing section nut (4) cover is in high-strength pull rod (2) and compresses tightly square steel pipe (3).

2. The expanding hook bolt of claim 1, wherein: the hook bolt (1) comprises a hook head (11) and an expansion surface (12), the hook head (11) is in a hook shape, and the expansion surface (12) surrounds the hook head (11) and is perpendicular to the surface where the hook head (11) is located.

3. The expanding hook bolt of claim 2, wherein: the high-strength pull rod (2) is meshed with the wing-shaped nut (4) through threads.

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