CN205012470U - Integrative pre -buried round platform nut is moulded to steel - Google Patents

Abstract

The utility model provides an integrative pre -buried round platform nut is moulded to steel, includes steel sleeve and is located the plastic cover of steel sleeve periphery, plastic cover with steel sleeve corresponds position punishment and do not is equipped with arch or groove phase cooperation, will the plastic cover is fixed in steel sleeve, it supplies the bolt to insert to have the mounting hole in the middle of the steel sleeve, the outside diameter of mounting hole is greater than inboard diameter, the plastic cover is along reducing gradually to inboard direction diameter from the outside. Utilize the plastic material to replace partial steel, both can guarantee the normal use of round platform nut, and clean steel round platform nut to a great extent saving steel, reduce cost are compared to it, the plastic cover is along reducing gradually to inboard direction diameter from the outside simultaneously for the convenient easy operation of dismantlement of round platform nut.

Description

A steel-plastic integrated pre-embedded round table nut

technical field

The utility model relates to a fastener, in particular to a steel-plastic integrated pre-embedded round table nut.

Background technique

With the rapid growth of my country's national economy and the rapid development of basic engineering construction, the application of pre-embedded round table nut technology in basic engineering construction is increasing. The pure steel round table nuts currently used have the characteristics of convenient formwork support, time saving, and guaranteed concrete appearance quality. They are widely used in engineering practices, such as bridges, sluices, ports and other basic engineering constructions.

Pre-embedded pure steel round table nuts are often used in the layered construction of pier columns, gate piers, retaining walls, caissons and cylinders. However, for some longer and wider member constructions, the number of single-layer pre-embedded If the pre-embedded pure steel round table nut is directly used, the material cost is high and the material is wasted.

Therefore, it is necessary to design a better embedded round table nut to solve the above problems.

Utility model content

Aiming at the problems existing in the prior art, the utility model provides a steel-plastic integrated pre-embedded round table nut which saves materials, reduces costs and is easy to disassemble.

In order to achieve the above object, the utility model adopts the following technical solutions:

A steel-plastic integrated pre-embedded round table nut, including a steel sleeve and a plastic sleeve located on the outer periphery of the steel sleeve, the plastic sleeve and the corresponding position of the steel sleeve are respectively provided with protrusions or grooves to match, The plastic sleeve is fixed on the steel sleeve, and there is a mounting hole in the middle of the steel sleeve for bolts to be inserted. The outer diameter of the mounting hole is larger than the inner diameter, and the diameter of the plastic sleeve gradually increases along the direction from the outer side to the inner side. decrease.

Further, the inner wall of the plastic sleeve is provided with a plurality of protrusions, and the corresponding steel sleeve is provided with a plurality of grooves, and the protrusions are fixed in the grooves.

Further, the tightening interface on the outside of the mounting hole is in the shape of a cross or an inner hexagon.

The beneficial effects of the utility model:

The steel-plastic integrated pre-embedded round table nut includes a steel sleeve and a plastic sleeve located on its outer periphery. The use of plastic materials instead of part of the steel can not only ensure the normal use of the round table nut, but also saves steel to a large extent compared with pure steel round table nuts. Reduce the cost; at the same time, the diameter of the plastic sleeve gradually decreases along the direction from the outside to the inside, making the disassembly of the round table nut convenient and easy to operate.

Description of drawings

Fig. 1 is the cross-sectional view of the steel-plastic integrated pre-embedded round table nut of the present invention;

Fig. 2 is a side view of the steel-plastic integrated pre-embedded round table nut of the utility model;

Fig. 3 is a side view of another embodiment of the steel-plastic integrated pre-embedded round table nut of the present invention;

Fig. 4 is the schematic diagram that the utility model is installed on the template and fixed on the wall with the round table nut;

Fig. 5 is the schematic diagram that the utility model is fixed on the bracket on the round table nut;

Fig. 6 is the flow chart of the construction method of the utility model adopting the steel-plastic integrated pre-embedded round table nut;

In the figure, 1—round nut, 2—steel sleeve, 3—plastic sleeve, 4—protrusion, 5—groove, 6—installation hole, 7—tightening interface, 8—template, 9—embedded screw, 10—bolt, 11—support, 12—gasket, 13—horizontal operating platform.

detailed description

Below in conjunction with accompanying drawing and specific embodiment the utility model is described in further detail.

As shown in Figure 1, the steel-plastic integrated pre-embedded round table nut 1 of the utility model includes a steel sleeve 2 and a plastic sleeve 3 located on the outer periphery of the steel sleeve 2, and the corresponding positions of the plastic sleeve 3 and the steel sleeve 2 are respectively provided with protrusions 4 or The grooves 5 cooperate to fix the plastic sleeve 3 to the steel sleeve 2. In this embodiment, the inner wall of the plastic sleeve 3 is provided with a plurality of protrusions 4, and the outer wall of the corresponding steel sleeve 2 is provided with a plurality of grooves. 5. The protrusion 4 enters the groove 5 and is fixed. The steel-plastic integrated round table nut 1 is more material-saving and lower in cost than the pure steel round table nut.

The steel sleeve 2 is generally made of high-quality carbon structural steel or other forms of steel that have been inspected and determined to meet the requirements. The processing and performance of the steel sleeve 2 must meet the relevant requirements of JGJ107-2010 "General Technical Regulations for Mechanical Connection of Reinforced Bars". The selection of materials for the peripheral plastic sleeve 3 should follow the principle of high quality and low price. According to the requirements of different loads, raw materials whose mechanical properties meet the load requirements should be selected. The processing and performance of plastics must meet the relevant requirements of GB1039-79 General Rules for Testing Methods of Mechanical Properties of Plastics.

There is a mounting hole 6 in the middle of the steel sleeve 2 for bolt insertion and installation. The outer diameter of the mounting hole 6 is larger than the inner diameter, and the outer part with a larger diameter is used for bolt insertion and fixing, as shown in Figure 2. In this embodiment, the outer diameter of the mounting hole 6 is The tightening interface 7 is cross-shaped, easy to machine, and can be equipped with a special cross plate tool (equivalent to a cross-shaped screwdriver) for on-site operation; in other embodiments, as shown in Figure 3, the tightening interface 7 can also be It is a bit difficult to machine the inner hexagon. It can be processed by the machine tool of the inner hexagonal bolt, and the general-purpose "hexagonal key" can be purchased, which is convenient to purchase and easy to operate.

The diameter of the plastic sleeve 3 decreases gradually along the direction from the outside to the inside, so that the disassembly of the table nut 1 is convenient and easy to operate.

As shown in Fig. 4 to Fig. 6, the construction method of the utility model adopting the above-mentioned steel-plastic integrated pre-embedded round table nut includes the following steps:

Step 1: Set up the mold. In order to ensure the accuracy of the position of the round table nut 1, it is necessary to open a round hole at the predetermined position of the template 8 before the mold is set up. The size of the round hole is determined by the diameter of the bolt. The template 8 with the round hole already opened Mount to the wall. Because the pre-embedded cone nut 1 is fixed on the template 8, so this method can also ensure that the embedded parts are embedded in the concrete due to the expansion of the template 8 during the pouring process.

Step 2: Correct the position of the template 8. Before fixing the round table nut 1 and screw 9, the template 8 needs to be corrected. If the embedded screw 9 and bolt 10 are installed and then the template 8 is corrected, the embedded screw 9 may collide with the steel bar.

Step 3: Fix the pre-embedded screw rod 9 and the round table nut 1 on the panel of the formwork 8 through bolts 10, and apply butter on the outside of the round table nut 1 to facilitate the disassembly and reuse of the round table nut 1.

Step 4: Pouring concrete on the wall. When pouring concrete, avoid direct contact of the vibrating rod with the embedded screw 9 and the round nut 1 to avoid loosening of the embedded screw 9 and the round nut 1.

Step 5: Remove the bolts 10 on the outside of the formwork 8. The removed bolts 10 need to be inspected and maintained regularly to ensure the safety and performance of the bolts 10.

Step 6: Remove formwork 8;

Step 7: Fix the support 11 on the round table nut 1 with bolts 10, add gaskets 12 when installing the bolts 10, set up a horizontal operating platform 13 on the support 11, and use it for the installation of the next layer of formwork 8.

Step 8: Install the formwork 8 on the horizontal operating platform 13, remove the formwork 8 after pouring, remove the bracket 11, and remove the round table nut 1, and then repeat the above steps.

The pre-embedded round table nut process of the utility model is to install the round table nut 1 and the pre-embedded screw rod 9 at a predetermined position before the component is poured into concrete, and open a round hole at the position corresponding to the template 8 on the end face of the pre-embedded round table nut 1 with a larger diameter. The diameter of the round hole is determined according to the diameter of the bolt 10. By tightening the bolt 10 on the outside of the template 8, the round table nut 1 is fixed on the template 8, and the side of the round table nut 1 is coated with butter so that the round table nut 1 can be disassembled and reused. After this layer of concrete, bolts 10 are used to fix the bracket 11 on the embedded auger nut 1 to provide a platform for the next layer of formwork.

Compared with the existing technology, this patented technical solution has the following technical advantages: Taking the M24 round table nut as an example, the original pure steel round table nut needs to be processed with a round steel bar with a diameter of 75mm and a length of 75mm, and the weight of the steel material consumed is about 2.36kg / piece; while the same M24 steel-plastic integrated round table nut only needs to be processed with a steel bar with a diameter of 40mm and a length of 75mm, and the weight of the steel is about 0.74kg/piece. The rough steel bar of the original pure steel round table nut: 2.6kg/piece; the rough steel material of the steel-plastic integrated round table nut is only: 0.74kg/piece, which is only 28.5% of the original billet. The effect is quite significant, so it can be greatly reduced The amount of steel used saves costs.

The above embodiments are only used to illustrate the technical solution of the utility model without limitation. Although the utility model has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the utility model can be modified or equivalently replaced , without departing from the purpose and scope of the technical solution, which should be covered by the scope of the claims of the present utility model.

Claims (3)

1. A steel-plastic integrated pre-embedded round table nut, characterized in that it comprises: a steel sleeve and a plastic sleeve positioned at the outer periphery of the steel sleeve, and the corresponding positions of the plastic sleeve and the steel sleeve are respectively provided with convex holes. The plastic sleeve is fixed on the steel sleeve by matching with the groove or the groove. There is a mounting hole in the middle of the steel sleeve for the bolt to be inserted. The outer diameter of the mounting hole is larger than the inner diameter. The diameter gradually decreases from the lateral to the medial direction. 2. The steel-plastic integrated pre-embedded round table nut according to claim 1, characterized in that: the inner wall of the plastic sleeve is provided with a plurality of protrusions, and the corresponding steel sleeve is provided with a plurality of grooves. The protrusion enters the groove and is fixed. 3. The steel-plastic integrated pre-embedded round table nut according to claim 1, characterized in that: the tightening interface on the outside of the installation hole is in the shape of a cross or an inner hexagon.