A method for preventing the fall of high-strength bolts from breaking

Abstract

The present invention provides a method for preventing the fall of high-strength bolts from breaking. The high-strength bolts include bolt heads, screw rods, nuts, and screw thread ends at the tail. The high-strength bolts are arranged in an array and are used to connect two steel structure members. The method includes setting a grid net perpendicular to the screw rod as a whole at one end of the nut and the screw thread end of the high-strength bolts arranged in an array, and at least four through holes are provided at the peripheral position of the grid net. Each through hole is used for the corresponding screw thread end at the tail to pass through, and the nut does not pass through the through hole. A light nut is screwed on the screw thread end at the tail passing through the through hole, so that the grid net and the light nut are directly or indirectly fixed on the high-strength bolt array and the steel structure member to prevent any one or more of the high-strength bolts arranged in an array from falling after breaking. The method of the present invention is simple and can effectively prevent any one or more high-strength bolts in the high-strength bolt array from falling after breaking at any part.

Description

Technical Field

[0001] The present invention relates to the field of engineering device structures, and particularly to a method for preventing the fall of high-strength bolts from breaking. Background Art

[0002] The steel structure components of steel structure bridges (including highway bridges, railway bridges, etc.) are generally connected by high-strength bolts. Since the tightened high-strength bolts are always in a high-stress state, over time, the high-strength bolts will gradually break. The broken high-strength bolts will fall under the action of gravity, seriously endangering the safety of vehicles, pedestrians, structures, etc. below the bridge. To avoid the fall of high-strength bolts, a method for preventing the fall of high-strength bolts from breaking is needed in this field.

[0003] Chinese Utility Model Patent CN201720621671 relates to a bridge construction anti-falling device, including a construction frame body. An external cross beam body is fixed on the outer end face of the frame body of the construction frame body. A triangular plate inclined outward from the frame body is arranged on the upper end face of the external cross beam body. A soft rubber layer is arranged on the upper inclined surface of the triangular plate. A protective cover body is arranged on the top of the frame body of the construction frame body. A fastening bolt is arranged on the front end face of the protective cover body. This utility model can effectively prevent falling objects from hitting people in the air and prevent construction workers from accidentally falling and getting injured, improve the firmness of the construction frame body, improve the safety of bridge construction, and ensure the personal safety of construction workers.

[0004] Chinese Utility Model Patent CN202120246702 discloses a bridge construction anti-falling device with a positioning function, including a base. A hydraulic device is arranged on the upper outer surface of the base. A hydraulic column is arranged on the upper end of the hydraulic device. A protective net is arranged on the upper end of the hydraulic column. A fixing block is arranged on the upper end of the protective net. A protective pad is arranged on the lower end of the protective net. A support block is arranged on the lower end of the protective pad. A fixing plate is arranged on the side outer surface of the base. This bridge construction anti-falling device with a positioning function limits the protective net by setting four hydraulic columns, and at the same time is convenient for adjusting the height. By arranging a protective pad at the lower end of the protective net, multi-layer protection is provided to improve the safety performance and provide guarantee for the life safety of workers. By setting a hydraulic cylinder so that the pressing plate touches the ground, the stability of the device during placement is enhanced. By setting universal wheels, the device is convenient to move, reducing the labor intensity of the staff. By setting a push handle, it is convenient for workers to push.

[0005] The above patents all relate to the safety protection of workers during bridge construction and do not involve how to prevent the fall of high-strength bolts after breaking during the operation and use of bridges.

[0006] Chinese invention patent application CN201711486001 discloses a high-strength bolt drop protection device for steel truss bridges, comprising a bolt drop protection device installed on a steel structure bridge. The bolt drop protection device comprises a fixing device, a main cable, a branch cable, a sensor, and a bolt assembly. Both sides of the main cable are connected and fixed to fixing devices fixed to the steel structure bridge. The sensor is fixed between the two fixing devices via the main cable. One or more branch cables are provided, arranged side by side on the outside of the main cable. Both sides of the branch cables are fixed to both sides of the main cable via bolt assemblies, and the branch cables press the main cable downward. This invention is easy, reliable, and safe to install, does not damage the steel truss bridge itself, is easy to debug and disassemble, and not only has a protective function but also has an accurate real-time monitoring function.

[0007] This invention can provide a certain degree of protection against the falling of high-strength bolts, but the protective device of this invention has a complex structure and is not practical in bridge applications.

[0008] Therefore, there is still a need in the art for a new method for preventing broken high-strength bolts from falling. Summary of the Invention

[0009] The present invention provides a method for preventing broken high-strength bolts from falling. The high-strength bolts include a screw head, a screw rod, a nut, and a screw tail thread. The high-strength bolts are arranged in an array and are used to connect two steel structural components. The method includes arranging a grid mesh that is perpendicular to the screw rod as a whole at one end of the nut and screw tail thread of the high-strength bolts arranged in the array, and arranging at least four through holes at the peripheral position of the grid mesh, each through hole is used for allowing a corresponding screw tail thread to pass through, and the nut does not pass through the through hole, and a lightweight nut is screwed on the screw tail thread passing through the through hole, so that the grid mesh and the lightweight nut are directly or indirectly fixed to the high-strength bolt array and the steel structural component to prevent any one or more of the high-strength bolts arranged in the array from falling after breaking.

[0010] In a specific embodiment, the two steel structure members are butt-jointed, and a high-strength bolt node plate is tightly arranged on both sides of the thickness direction of the two steel structure members. The high-strength bolt node plate is used to connect the two steel structure members, so that the grille mesh and lightweight nuts are fixed to the high-strength bolt node plate and the steel structure member by high-strength bolts.

[0011] In a specific embodiment, the grille mesh is a steel wire mesh, and the lightweight nut is a plastic nut.

[0012] In a specific embodiment, the grille mesh includes a rectangular main structure and a folding portion, and the folding portion is arranged at the four sides of the main structure, so that the grille mesh is in the shape of a box lid as a whole; four through holes and four lightweight nuts are respectively arranged at the four corners of the main structure.

[0013] In a specific embodiment, there are more than 6 vias, and one via and a lightweight nut are further provided at the middle positions of the two long sides of the rectangular main body structure respectively.

[0014] The method of the present invention is simple and can effectively prevent any one or more high-strength bolts in the high-strength bolt array from falling after breaking at any part. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a front view schematic diagram of the corresponding structure of the method for preventing a high-strength bolt from falling after breaking in the present invention.

[0016] Figure 2 It is a left view schematic diagram of the corresponding structure of the method for preventing a high-strength bolt from falling after breaking in the present invention.

[0017] Figure 1 and 2 In FIGS. 1 and 2: grid net 1, high-strength bolt 2, lightweight nut 3, high-strength bolt gusset plate 4, steel structure member 5, via 11, folding part 12, bolt head 21, bolt rod 22, nut 23, thread at the bolt tail 24. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] As Figure 1 and Figure 2 shown, the present invention provides a method for preventing a high-strength bolt broken on a bridge from falling. The high-strength bolt includes a bolt head, a bolt rod, a nut and a thread at the bolt tail. The high-strength bolts are arranged in an array and used to connect two steel structure members. The method includes arranging a grid net perpendicular to the bolt rod integrally at one end of the nut and the thread at the bolt tail of the high-strength bolts arranged in an array, and arranging at least four vias in total at the peripheral positions of the grid net. Each via is used for the corresponding thread at the bolt tail to pass through, and the nut does not pass through at the via. And a lightweight nut is screwed on the thread at the bolt tail passing through the via, so that the grid net and the lightweight nut are directly or indirectly fixed on the high-strength bolt array and the steel structure member to prevent any one or more of the high-strength bolts arranged in an array on the bridge from falling after breaking.

[0019] In the present invention, the high-strength bolt is a high-strength bolt for steel structure, that is, the bolt head 21, the bolt rod 22, the nut 23 and the thread at the bolt tail 24 of the high-strength bolt are all made of steel structure.

[0020] As Figure 2 shown, the steel structure member 5 is generally a box-shaped member or an I-beam member. Therefore, the bolt head 21 of the high-strength bolt 2 is generally arranged inside the steel structure member 5, while the thread at the bolt tail 24 and the nut 23 are generally arranged outside the steel structure member 5. Therefore, in the present invention, although the specific breaking position of the high-strength bolt 2 is uncertain, generally only the thread at the bolt tail 24, the nut 23 and the bolt rod 22 need to be prevented from falling from the outside of the steel structure member 5.

[0021] Figure 1 and Figure 2 The steel structure member 5 shown in Figure 2 is in a butt joint form. Therefore, high-strength bolt gusset plates 4 are required to connect the two butt-jointed steel structure members 5 through an array of high-strength bolts 2, and high-strength bolt gusset plates 4 are provided on both sides in the thickness direction of the butt-jointed steel structure members 5. As can be understood by those skilled in the art, when the two steel structure members 5 are lap-jointed, it is not necessary to separately provide high-strength bolt gusset plates 4, and only an array of high-strength bolts 2 is needed to connect the two lap-jointed steel structure members 5.

[0022] In a specific embodiment, the screw rod 22 of the high-strength bolt 2 can be arranged horizontally, vertically or obliquely, etc. Generally, the mesh surface of the grille 1 is kept perpendicular to the screw rod 22 of the array of high-strength bolts 2 or the mesh surface is close to perpendicular to the screw rod 22. Therefore, the grille 1 can also be arranged horizontally, vertically or obliquely.

[0023] In the present invention, after the nut 23 of the array of high-strength bolts 2 is tightened, generally several threads will be left at the bolt tail, that is, the thread end 24 of the high-strength bolt 2 will protrude outside the nut 23. Therefore, a through hole 11 is opened at each of the four corners of the grille 1 to expose the thread end 24 outside the grille 1, while the nut 23 does not protrude outside the grille 1, and then a light nut 3 is screwed onto the exposed thread end 24.

[0024] In the present invention, Figure 2 The screw rods 22 of the high-strength bolts 2 corresponding to the high-strength bolt gusset plates 4 shown on the left and right in

[0024] are completely in a horizontal state. Therefore, the grille 1 is basically on a vertical plane. At this time, the grille 1 can still hold the broken high-strength bolt 2 and prevent it from falling. This is because the grille 1 will apply a certain pressure to each thread end 24 in the array of high-strength bolts 2, thus pressing the broken high-strength bolt 2 and preventing it from falling. In addition, preferably, the grille 1 further includes folding portions 12. When the folding portions 12 are provided on the four sides of the same grille 1, the grille 1 is integrally in a box cover shape, and the folding portions 12 can better hold the broken high-strength bolts, so that the high-strength bolts that may fall can be further held in all directions.

[0025] In addition, in order to make the grille 1 more stable, more through holes 11 can be additionally provided at intervals in the middle of the large-area grille to expose more thread ends 24, and light nuts 3 are screwed onto them.

[0026] The above content is a further detailed description of the present invention in combination with specific embodiments, and it cannot be determined that the specific implementation of the present invention is only limited to these descriptions. For those of ordinary skill in the technical field to which the present invention pertains, without departing from the concept of the present invention, several simple deductions and substitutions can still be made, and all should be regarded as belonging to the protection scope of the present invention.

Claims

1. A method for preventing the drop of high-strength bolts from breaking. The high-strength bolt (2) includes a bolt head (21), a bolt rod (22), a nut (23) and a thread at the bolt tail (24). The high-strength bolts (2) are arranged in an array and are used to connect two steel structure members (5), and is characterized in that, The method includes arranging a grid net (1) perpendicular to the screw rod (22) integrally at one end of the nut (23) and the screw tail thread (24) of the high-strength bolts (2) arranged in an array, and at least four through holes (11) are arranged at the peripheral position of the grid net (1). Each through hole (11) is used for the corresponding screw tail thread (24) to pass through, and the nut (23) does not pass through at the through hole (11). A lightweight nut (3) is screwed on the screw tail thread (24) passing through the through hole (11), so that the grid net (1) and the lightweight nut (3) are directly or indirectly fixed on the high-strength bolt (2) array and the steel structure member (5) to prevent any one or more of the high-strength bolts arranged in an array from falling after breaking; when the grid net (1) is basically in a vertical plane, the grid net (1) will apply a certain pressure to each screw tail thread (24) in the high-strength bolt (2) array, thus pressing the broken high-strength bolt (2) to prevent it from falling.

2. The method according to claim 1, wherein The two steel structure members (5) are arranged in butt joint, and a high-strength bolt node plate (4) is closely arranged on each side of the two steel structure members (5) in the thickness direction. The high-strength bolt node plate (4) is used to connect the two steel structure members (5), so that the grid net (1) and the lightweight nut (3) are fixed on the high-strength bolt node plate (4) and the steel structure member (5) by high-strength bolts.

3. The method according to claim 1 or 2, characterized in that, The grid net (1) is a wire mesh, and the lightweight nut (3) is a plastic nut.

4. The method according to claim 2, wherein The grid net (1) includes a rectangular main structure and folding parts (12), and the folding parts (12) are arranged at the four sides of the main structure, so that the grid net (1) is integrally in the shape of a box cover; four through holes (11) and four lightweight nuts (3) are respectively arranged at the four corners of the main structure.

5. The method according to claim 4, wherein The number of the through holes (11) is more than 6, and one through hole (11) and one lightweight nut (3) are also arranged at the middle positions of the two long sides of the rectangular main structure respectively.

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