CN216788899U

CN216788899U - S-shaped T-shaped bolt for hot rolling channel steel

Info

Publication number: CN216788899U
Application number: CN202122828878.2U
Authority: CN
Inventors: 罗良泽
Original assignee: Ningbo Lingqi Hardware Industry Co ltd
Current assignee: Ningbo Lingqi Hardware Industry Co ltd
Priority date: 2021-11-18
Filing date: 2021-11-18
Publication date: 2022-06-21
Anticipated expiration: 2031-11-18

Abstract

The utility model discloses an S-shaped T-shaped bolt for hot rolling channel steel, which comprises a nut head, wherein the nut head is in a cuboid shape, the cuboid is provided with a first corner, a second corner, a third corner and a fourth corner, a first fillet is formed at the first corner, a first acute angle extends out from the second corner, a second fillet is formed at the third corner, and a second acute angle extends out from the fourth corner; the cuboid digs out a wedge on the surface that leans on the screw thread side, forms wedge location limit, right wedge location limit with the synthetic closed angle of cuboid side carries out the radius and handles, forms the third fillet. Through carrying out the radius to first, three corners and handling, extend the acute angle to second, four corners, carry out the radius to the synthetic closed angle of wedge location limit and cuboid side and handle, make the S-shaped nut head rotate smoothly in the inside cavity of hot rolling channel-section steel to can hook the cavity of hot rolling channel-section steel effectively, realize fixed firm function.

Description

S-shaped T-shaped bolt for hot rolling channel steel

Technical Field

The utility model relates to the field of fasteners, in particular to an S-shaped T-shaped bolt for hot-rolled channel steel.

Background

With the rapid development of social economy, more and more cities begin to build subway tunnels, and pre-buried channels are widely used in the subway tunnels. The pre-buried channel is formed by burning hot-rolled channel steel on a preset occasion through concrete and is used as a foundation for subsequent fixtures such as electromechanical pipelines and equipment. The fixing is generally realized by taking a T-shaped bolt, because the nut head of the T-shaped bolt is rectangular (also called as a rectangular head), one side is long, the other side is short, the short side is put in from the opening of the hot rolled channel steel (see figure 6-1), after the T-shaped bolt is put in the cavity of the hot rolled channel steel, the T-shaped bolt is rotated by 90 degrees, so that the long side of the nut head of the T-shaped bolt can be reversely hooked on the cavity of the hot rolled channel steel (see figure 6-2), the to-be-fixed object is sleeved in the screw rod of the T-shaped bolt, and finally the T-shaped bolt is fixed by a nut matched with a washer and the like (see figure 1 and figure 2 in detail). In the actual construction process, because the hot-rolled channel steel belongs to a standard part, the width A and the height E of the cavity inside the hot-rolled channel steel are influenced by manufacturing errors, the tolerance range is large, in addition, the hot-rolled channel steel is in a strip shape, and the cavity inside the hot-rolled channel steel is provided with the concave positioning edge (see fig. 6-1), if the hot-rolled channel steel is extruded by external force and the like, the actual sizes of the width A and the height E of the cavity can be reduced, when the diagonal length D of the rectangular nut head of the T-shaped bolt is larger than the width A of the cavity of the hot-rolled channel steel, the bolt head of the T-shaped bolt can be placed into the opening of the hot-rolled channel steel, but after the T-shaped bolt head is placed into the opening, the bolt head cannot rotate in the cavity and can be blocked by the inner wall of the hot-rolled channel steel, so that the concave positioning edge of the cavity of the hot-rolled channel steel cannot be completely hooked, and the fixing is unreliable; if the height F of the rectangular nut head of the T-shaped bolt is greater than the height E of the cavity of the hot rolled channel, the bolt head of the T-shaped bolt can be placed into the opening of the hot rolled channel, but cannot rotate in the cavity after being placed into the opening. Under the two conditions, the T-shaped bolt with the screw cap head smaller by one level needs to be replaced, but the T-shaped bolt is generally a non-standard part and needs to be customized, the mold needs to be opened again, the production cost is high, and the timely requirement of construction is difficult to meet.

Disclosure of Invention

Aiming at the defects existing in the prior art, the technical problems to be solved by the utility model are as follows: provided is an S-shaped T-shaped bolt capable of correcting manufacturing errors or deformation of hot-rolled steel channels.

In order to solve the technical problems, the utility model is realized by the following technical measures: an S-shaped T-shaped bolt for hot rolling channel steel comprises a nut head, wherein a screw rod with an external thread extends out of the nut head integrally, the nut head is in a cuboid shape, the cuboid is provided with a first corner, a second corner, a third corner and a fourth corner, rounding processing is carried out on the first corner to form a first round angle, an arc-shaped first acute angle extends out of the second corner integrally, rounding processing is carried out on the third corner to form a second round angle, and an arc-shaped second acute angle extends out of the fourth corner integrally; the cuboid digs a wedge block on the surface close to the thread side to form a wedge positioning edge, and the wedge positioning edge and the resultant closed angle of the side edge of the cuboid are rounded to form a third fillet.

Compared with the prior art, the utility model has the advantages that: the traditional nut head is in a rectangular shape with four right angles, and the S-shaped nut head is characterized in that on the basis of the original rectangular nut head, rounding treatment is respectively carried out on a first corner and a third corner, and an arc-shaped acute angle is integrally extended from a second corner and a fourth corner respectively; simultaneously, carry out the radius to the synthetic closed angle of wedge location limit and cuboid side and handle, form the third fillet, make S-shaped nut head rotate smoothly in the inside cavity of hot rolling channel-section steel, the overhead wedge location limit of screw thread is anastomotic with the indent location limit of the cavity of hot rolling channel-section steel each other to can hook the cavity of hot rolling channel-section steel effectively, realize fixed firm function.

As a modification of the utility model, the first round corner of the first corner and the second round corner of the third corner have the same shape and size. The purpose of selecting the design is as follows: the round angles of the two opposite sides have the same size, so that the product has beautiful appearance.

As an improvement of the present invention, a first acute angle of the arc shape at the second corner is the same as a second acute angle of the arc shape at the fourth corner. The purpose of selecting the design is as follows: the arc acute angles of the two opposite sides have the same shape and size, so that the product has beautiful appearance.

As an improvement of the utility model, the end face of the screw is provided with a position mark. The purpose of selecting the design is as follows: whether the S-shaped nut head rotates to the position or not can be judged through the direction of the position mark.

As a modification of the present invention, the position mark is in the shape of a straight line. The purpose of selecting the design is as follows: the linear position mark is simple and practical, and is easy to understand when an operator performs construction.

As an improvement of the utility model, the screw rod material is stainless steel or alloy steel treated by special anti-corrosion technology. The purpose of selecting the design is as follows: anticorrosive materials such as stainless steel are selected for materials, the requirement of the working environment is mainly considered, and the working environment is severe because most of rail transit is underground.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model. In the drawings:

fig. 1 is a view showing an installation state of the S-shaped T-bolt according to the present invention.

Fig. 2 is a schematic view of a conventional T-bolt according to the present invention.

FIG. 3 is a perspective view of an S-shaped T-bolt according to the present invention.

FIG. 4 is a schematic view of an S-shaped T-bolt according to the present invention.

Fig. 5 is a schematic view of an S-shaped nut head according to the present invention.

Fig. 6 is a view illustrating a conventional T-bolt mounting process according to the present invention.

Description of reference numerals: 1. an S-shaped T-shaped bolt; 2. hot rolling channel steel; 3. concrete; 4. fixing a fixture; 5. a nut; 6. a rectangular nut head; 7. an S-shaped nut head; 8. a first rounded corner; 9. a first acute angle; 10. position marking; 11. a rectangular area; 12. A first corner; 13. a second corner; 14. a third corner; 15. a fourth corner; 16. a wedge-shaped positioning edge; 17. sharp corners; 18. A third fillet; 19. concave positioning edge.

Detailed Description

Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the utility model and are not to be construed as limiting the utility model.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.

Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "secured" are to be construed broadly and encompass, for example, both fixed and removable connections; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Unless expressly stated or limited otherwise, the recitation of a first feature "on" or "under" a second feature may include the recitation of the first feature being in direct contact with the second feature, and may also include the recitation of the first feature being in contact with the second feature, but rather being in contact with the additional feature between them. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The technical scheme of the utility model is further explained by the specific implementation mode in combination with the attached drawings.

Example 1

Referring to fig. 1-6, in an S-shaped T-bolt 1 of the present disclosure, the S-shaped T-bolt 1 is an l qd60 × 12, the S-shaped T-bolt 1 includes a nut head, a screw (length 60mm) having an external thread (M12) is integrally extended from the nut head, wherein the nut head has a rectangular parallelepiped shape, the rectangular parallelepiped has a first corner 12, a second corner 13, a third corner 14, and a fourth corner 15, a round-off processing is performed at the first corner 12, a round-off corner R8mm is formed to form a first round-off corner 8 (see fig. 5-a), an arc-shaped first acute angle 9 is integrally extended at the second corner 13, the acute angle is R30 degrees (see fig. 5-a), a round-off processing is performed at the third corner 14 to form a second round-off corner R8mm, and an arc-shaped second acute angle is integrally extended at the fourth corner 15, the acute angle is R30 degrees, and after the chamfering process, the conventional T-bolt with a rectangular head (i.e. the dashed rectangular area 1111 in fig. 5-a) is changed into the S-shaped T-bolt 1. The cuboid digs out a wedge on the surface of leaning on the screw thread side, forms wedge location limit 16, right wedge location limit 16 with the synthetic closed angle 17 of cuboid side carries out the radius and handles, forms third fillet 18, and the fillet is R6 mm.

In the embodiment of the present application, the length of the short side B of the diagonal line of the S-shaped nut head 7 is 22.5mm, the length of the long side C of the diagonal line of the S-shaped nut head 7 is 23.5mm, and the height F of the S-shaped nut head 7 is 12 mm.

When the S-shaped T-shaped bolt 1 for hot-rolled channel steel 2 provided in this embodiment is used, the cavity width a of the hot-rolled channel steel 2 is 24 ± 1mm, and the cavity clear height E of the hot-rolled channel steel 2 is 14 ± 1mm, which are matched with the S-shaped T-shaped bolt 1 with the model number LQD60 × 12. In the prior art, the length of a rectangular head of a traditional T-shaped bolt is 20mm, the width is 13mm, and the height is 12.8mm, because the T-shaped bolt is in the shape of the rectangular head, two diagonal edges are equally long, and the length is 23.8mm, under an ideal condition, the T-shaped bolt with the rectangular head can be placed in a cavity of a hot-rolled channel steel 2, but due to manufacturing tolerance or deformation caused by external force, the condition that the width A of the cavity of the hot-rolled channel steel 2 (when the tolerance 23mm is removed) is smaller than the diagonal length (23.8mm) of the T-shaped bolt with the rectangular head exists in actual construction, and the T-shaped bolt cannot be normally placed in the cavity; if the clear height E of the cavity of the hot-rolled channel steel 2 is 12.5mm (influenced by deformation) and is smaller than the height of a traditional T-shaped bolt by 12.8mm, the hot-rolled channel steel cannot be normally placed in the cavity, and therefore the purpose of fixing cannot be achieved. At this time, the S-shaped T-shaped bolt 1 is used, because the short edge has been chamfered, the length of the short edge B is only 22.5mm and is smaller than the cavity width A (when the lower tolerance is 23 mm), meanwhile, the height F of the S-shaped nut head 7 is 12mm, the clear height E of the cavity far smaller than the hot rolled channel steel 2 is 14 +/-1 mm, and the S-shaped T-shaped bolt can be placed in the cavity of the hot rolled channel steel 2.

The S-shaped nut head 7 is characterized in that on the basis of the original rectangular nut head, rounding processing is respectively carried out on a first corner and a third corner, and an arc-shaped acute angle is integrally extended from a second corner and a fourth corner respectively; meanwhile, a sharp corner 17 formed by combining the wedge-shaped positioning edge 16 and the side edge of the cuboid is rounded to form a third round angle 18, so that the S-shaped nut head 7 can smoothly rotate in the cavity inside the hot-rolled channel steel 2, the wedge-shaped positioning edge 16 on the screw thread head is matched with the concave positioning edge 19 in the cavity of the hot-rolled channel steel 2, the S-shaped nut head 7 can smoothly rotate in the cavity inside the hot-rolled channel steel 2 within different manufacturing tolerance ranges, the cavity of the hot-rolled channel steel 2 can be effectively hooked, and the function of fixation is firm.

The foregoing is merely illustrative of the preferred embodiments of the present invention and is not to be construed as limiting the claims. The present invention is not limited to the above embodiments, and the specific structure thereof is allowed to vary. All changes which come within the scope of the utility model as defined by the independent claims are intended to be embraced therein.

Claims

1. The utility model provides a S-shaped T type bolt for hot rolling channel-section steel, includes the nut head, the integrative screw rod that has the external screw thread that extends of nut head, characterized by: the shape of the nut head is a cuboid, the cuboid is provided with a first corner (12), a second corner (13), a third corner (14) and a fourth corner (15), the first corner (12) is subjected to rounding treatment to form a first fillet (8), the second corner (13) is integrally extended to form an arc-shaped first acute angle (9), the third corner (14) is subjected to rounding treatment to form a second fillet, and the fourth corner (15) is integrally extended to form an arc-shaped second acute angle; the cuboid digs out a wedge on the surface of leaning on the screw thread side, forms wedge location limit (16), right wedge location limit (16) with the synthetic closed angle (17) of cuboid side carry out the radius and handle, form third fillet (18).

2. An S-shaped T-bolt for hot rolled steel channels as claimed in claim 1, wherein: the first round angle (8) at the first corner (12) and the second round angle at the third corner (14) are the same in shape and size.

3. An S-shaped T-bolt for hot rolled steel channels as claimed in claim 1, wherein: the first acute angle (9) of the arc shape at the second corner (13) and the second acute angle of the arc shape at the fourth corner (15) are the same in shape and size.

4. An S-shaped T-bolt for hot rolled steel channels as claimed in claim 1, wherein: and the end surface of the screw is provided with a position mark (10).

5. An S-shaped T-bolt for hot rolled steel according to claim 4, wherein: the position mark (10) is in a shape of a Chinese character 'yi'.

6. An S-shaped T-bolt for hot rolled steel channels as claimed in claim 1, wherein: the screw rod is made of stainless steel or alloy steel treated by special anti-corrosion technology.