Anti-falling fastening bolt

Abstract

The utility model relates to an anti-falling fastening bolt, which comprises a screw rod, a deformation pin, an empennage nut and a positioning pin, the empennage nut is rotatably sleeved on the screw rod, the deformation pin is rotatably installed in the front end of the screw rod through the positioning pin, the deformation pin rotates in the screw rod to the 1-shaped or T-shaped front end, and the tail wing nut is sleeved on the tail wing nut through the positioning pin. The 1-shaped front end is convenient for the screw rod to penetrate through a fastening hole of a fastened object, and the T-shaped front end enables the fastened object to be attached. Compared with the prior art, the falling possibility of the bolt and all parts of the bolt is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of bolts and relates to an anti-falling fastening bolt. Background Art

[0002] During the overhaul of the AP1000 unit, the cantilever crane was disassembled and assembled to assist with the main line refueling. Several issues were found that may have the risk of foreign matter intrusion and increase the collective dose:

[0003] Due to the unique design of the AP1000 unit, a cantilever crane needs to be installed in the refueling pool and on the integrated top cover every time a refueling overhaul is performed. The cantilever crane is used to disassemble and assemble the QUICKLOC and move the bolt tensioner. After use, the cantilever crane needs to be dismantled. During the disassembly and assembly process, the existing cantilever crane electrical control box fastening bolts are just ordinary screws, nuts, and washers. During the fastening process, a variety of tools must be used to cooperate in order to fasten. The area around the integrated top cover is a high-dose area, which is easy to cause tool contamination.

[0004] Since the existing cantilever crane electrical control box fastening bolts are just ordinary screws, nuts, and washers, and the operator needs to wear paper clothes, latex gloves, shoe covers, γ protective clothing, and masks and use a climbing vehicle to rise to a working position of about 7 meters for fastening operations, whether it is threading the bolts through the eyes, or putting caps on the bolts and tightening them, they all rely on manual operations for fall protection, and cannot effectively implement fall prevention measures for fastening bolts; even if protection is taken below the operation, when a fall occurs, it is still out of control. In actual work, the risk of falling has been taken seriously, but the installed nuts still fall; the fall height is high, and the high and low spans of the refueling pool are complex. Sometimes the low span of the refueling pool has been filled with water, and it is very difficult to find fallen objects. Due to the particularity of the fall position in the high-risk area for foreign body protection, if there are any fallen objects, they must be found;

[0005] Due to the particularity of the working environment, work location, working status (need to wear additional protective equipment and latex gloves), and work content (fine work such as threading bolts through eyes, bolting caps, and tightening), the work cannot be completed quickly and additional falling protection items are needed, which greatly prolongs the work in high-dose areas and increases the collective dose.

[0006] Patent CN102758817A discloses an expansion bolt, including a screw rod and a nut with a nut, the nut and the screw rod are respectively provided with internal and external threads matching each other, the nut is threadedly connected with the screw rod, and the other end of the nut relative to the screw rod is also provided with a plurality of expansion pieces with internal threads, the screw rod is inserted through the nut and threadedly connected with the expansion pieces. However, this patent is only applicable to the combination of stone wall or wall brick and the wall behind it, and cannot realize the fastening function of the cantilever crane electrical control box; and this patent cannot realize the function of repeated disassembly and assembly; and this patent needs to use other tools to punch holes in advance, and then use other tools to fasten, in order to achieve the expansion and fastening effect; in addition, this patent has no anti-falling measures, the screw rod has the risk of falling, and the nut has the risk of falling off. Utility Model Content

[0007] The purpose of the present invention is to provide a falling-proof fastening bolt in order to overcome at least one defect of the above-mentioned prior art. The present invention reduces the possibility of the bolt and its components falling.

[0008] The purpose of the utility model can be achieved through the following technical solutions:

[0009] One of the technical solutions of the utility model is to provide an anti-fall fastening bolt, which includes a screw rod, a deformation pin, a tail wing nut and a positioning pin. The tail wing nut is rotatably sleeved on the screw rod, and the deformation pin is rotatably installed in the front end of the screw rod through the positioning pin. The deformation pin is rotated in the screw rod to a "1"-shaped or "T"-shaped front end. The "1"-shaped front end facilitates the screw rod to pass through the fastening holes of the fastening object and the foundation channel steel, and the "T"-shaped front end makes the fastening object fit tightly with the foundation channel steel, which is convenient for the use of the bolt and can also reduce the possibility of the screw rod falling off.

[0010] Furthermore, the front portion of the screw rod is configured as a threaded rod, and an outer surface of the threaded rod is provided with external threads.

[0011] Furthermore, a receiving groove is provided at the front end of the threaded rod, and a deformation pin is installed in the receiving groove. The receiving groove allows the deformation pin to have rotation space in the front end of the threaded rod.

[0012] Furthermore, a positioning hole is provided at the front end of the threaded rod, and the positioning pin passes through the positioning hole to rotatably install the deformation pin in the front end of the screw rod. The positioning pin makes it difficult for the deformation pin to fall off from the screw rod, which facilitates the rotation of the deformation pin and reduces the possibility of the deformation pin falling off, thereby ensuring the integrity of the bolt and eliminating the loose parts.

[0013] A rotation hole is provided on the deformation pin, and the positioning pin passes through the rotation hole to rotationally install the deformation pin in the front end of the screw rod.

[0014] Furthermore, the external thread at the front end of the threaded rod is worn and damaged after the screw rod, deforming pin, tail wing nut and locating pin are assembled, making it difficult for the tail wing nut to fall off due to excessive rotation on the front end of the screw rod, thereby reducing the possibility of the tail wing nut falling off, ensuring the integrity of the bolt, and eliminating the need for loose parts.

[0015] Furthermore, the rear end of the screw is configured as a holding head, the outer diameter of the holding head is larger than the outer diameter of the threaded rod, the holding head is transitionally connected to the threaded rod, and the tail wing nut is blocked by the holding head at the rear end of the screw when rotating on the screw, so that the tail wing nut is not easy to fall off, thereby ensuring the integrity of the bolt and the absence of loose parts.

[0016] Furthermore, a binding hole is provided on the gripping head, a hand rope is passed through the binding hole, and the hand rope is used to bind the screw rod to the fastening object, thereby reducing the possibility of the screw rod falling off.

[0017] Furthermore, the tail wing nut comprises a nut, a thread groove is provided in the nut, and an inner surface of the thread groove is provided with an internal thread.

[0018] Furthermore, the tail wing nut includes an integrated tail wing, a nut and a nut washer, the nut is provided on the nut, and the nut is provided on the tail wing. The tail wing facilitates personnel to rotate the tail wing nut, and the nut washer increases the sealing and anti-loosening ability between the tail wing nut and the fastening object.

[0019] As a preferred technical solution, a pair of tail wings are provided on the nut.

[0020] Furthermore, the contact surfaces of the deformable pin and the tail wing nut with the fastening object are all configured as anti-slip surfaces, and the anti-slip surfaces are used to enhance the fastening effect when the bolts are tightened.

[0021] As a preferred technical solution, the material of all components of the bolt (screw rod, deformation pin, tail wing nut and positioning pin) includes low carbon steel, low carbon alloy steel or medium carbon steel (material of high strength bolt).

[0022] One of the technical solutions of the utility model is to provide a fall prevention fastening method, which uses the bolts for fastening, and the method comprises the following steps:

[0023] The tail wing nut is sleeved on the screw rod, the deformation pin is placed in the screw rod, and after the holes are aligned, the deformation pin is installed in the screw rod through the positioning pin, so that the deformation pin can rotate in the screw rod, and the bolt is assembled;

[0024] When installing the integrated top cover cantilever crane control box in the refueling pool, first tie the assembled bolts with hand ropes for standby use. When the cantilever crane control box is placed on the installation platform, rotate the deformed pin in front of the bolt to a "1" shape consistent with the screw rod, insert it into the fastening hole of the foundation channel steel, pass it through the fastening hole of the control box, and then rotate the deformed pin in front of the bolt to a "T" shape that is perpendicular to the screw rod. Finally, directly rotate the tail wing nut to tighten it without the help of other tools, and finally achieve the purpose of fastening the control box to the foundation channel steel;

[0025] If necessary, it can be disassembled and assembled repeatedly by reverse operation.

[0026] Compared with the prior art, the utility model has the following beneficial effects:

[0027] (1) The fastening bolt of the utility model can be tied. During use, a hand rope can be used to tie the fastening bolt to reduce the possibility of the screw falling off;

[0028] (2) The nut and the washer of the utility model are integrated into the tail wing nut. When the tail wing nut rotates on the screw, it is blocked by the gripping head at the rear end of the screw, so that the tail wing nut is not easy to fall off. Also, due to the wear and damage of the threads at the front end of the screw, the tail wing nut is not easy to fall off due to excessive rotation on the front end of the screw, which reduces the possibility of the tail wing nut falling off and prevents the tail wing nut from being unscrewed. Personnel can still perform bolt installation and tightening operations without disassembling the various components of the fastening bolt;

[0029] (3) The deformable pin of the utility model can be rotated to the "1"-shaped front end when the screw rod passes through the fastening hole, and rotated to the "T"-shaped front end before the bolt is tightened. The "T"-shaped front end makes the fastening object fit tightly with the foundation channel steel, which is convenient for the use of the bolt and can also reduce the possibility of the screw rod falling off. In addition, the deformable pin is installed in the front end of the screw rod through the positioning pin. The positioning pin makes it difficult for the deformable pin to fall off from the screw rod, which is convenient for the rotation of the deformable pin and can also reduce the possibility of the deformable pin falling off.

[0030] (4) The fastening bolts of the utility model can be fastened without the aid of other tools, and can be widely used in the bolt fastening work of the nuclear island loading and refueling pool of the AP1000 unit. In the disassembly and assembly of the electrical control box of the cantilever crane of the loading and refueling pool, the disassembly and installation efficiency is effectively improved, meeting the requirements of the maintenance specifications. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic diagram of the main structure of the screw in the embodiment of the utility model;

[0032] Figure 2 This is a left-side structural schematic diagram of a screw in an embodiment of the utility model;

[0033] Figure 3 This is a schematic diagram of the front view of the deformable pin in the embodiment of the utility model;

[0034] Figure 4 It is a left-side structural schematic diagram of a deformable pin in an embodiment of the utility model;

[0035] Figure 5 It is a schematic diagram of the top view of the deformation pin in the embodiment of the utility model;

[0036] Figure 6 This is a schematic diagram of the front view of the rear wing nut in the embodiment of the utility model;

[0037] Figure 7 It is a schematic diagram of the top view of the rear wing nut in the embodiment of the utility model;

[0038] Figure 8 This is a schematic diagram of the main structure of the positioning pin in the embodiment of the utility model;

[0039] Fig. 9 It is a schematic diagram of the main structure of the anti-fall fastening bolt in the embodiment of the utility model when the deformation pin is rotated to a "1" shape;

[0040] Fig.10 It is a schematic diagram of the main structure of the anti-fall fastening bolt in the embodiment of the utility model when the deformation pin is rotated to a "T" shape.

[0041] Description of the markings in the figure:

[0042] 1—screw, 11—threaded rod, 12—holding head, 13—positioning hole, 14—binding hole, 15—accommodating slot;

[0043] 2—deformation pin, 21—rotation hole;

[0044] 3—tail wing nut, 31—tail wing, 32—nut, 33—thread washer, 34—thread groove;

[0045] 4—Location pin. DETAILED DESCRIPTION

[0046] The present invention is described in detail below in conjunction with specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and a specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0047] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third" and the like are used to describe common objects, and only refer to different instances of the same object, and are not intended to imply that the objects described in this way must adopt a given order, whether in time, space, order or any other manner.

[0048] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] Example:

[0050] A fall-proof fastening bolt, such as Figures 8 to 10 As shown, it includes a screw rod 1, a deforming pin 2, a tail wing nut 3 and a positioning pin 4. The tail wing nut 3 is rotatably sleeved on the screw rod 1, and the deforming pin 2 is rotatably installed in the front end of the screw rod 1 through the positioning pin 4. The deforming pin 2 is rotated in the screw rod 1 to a "1"-shaped or "T"-shaped front end. The "1"-shaped front end facilitates the screw rod 1 to pass through the fastening holes of the fastening object and the foundation channel steel, and the "T"-shaped front end makes the fastening object and the foundation channel steel fit tightly, which is convenient for the use of the bolt and can also reduce the possibility of the screw 1 falling off;

[0051] like Figure 1 and Figure 2 As shown, the front portion of the screw rod 1 is provided as a threaded rod 11, and the outer surface of the threaded rod 11 is provided with external threads;

[0052] The front end of the threaded rod 11 is provided with a receiving groove 15, in which the deforming pin 2 is installed, and the receiving groove 15 allows the deforming pin 2 to have a rotation space in the front end of the threaded rod 11;

[0053] A positioning hole 13 is provided at the front end of the threaded rod 11, and the positioning pin 4 passes through the positioning hole 13 to rotatably install the deforming pin 2 in the front end of the screw rod 1. The positioning pin 4 makes it difficult for the deforming pin 2 to fall off from the screw rod 1, which facilitates the rotation of the deforming pin 2 and reduces the possibility of the deforming pin 2 falling off, thereby ensuring the integrity of the bolt and eliminating the presence of loose parts.

[0054] The external thread at the front end of the threaded rod 11 is worn and damaged after the screw rod 1, the deforming pin 2, the tail wing nut 3 and the positioning pin 4 are assembled, so that the tail wing nut 3 is not easy to fall off due to excessive rotation on the front end of the screw rod 1, thereby reducing the possibility of the tail wing nut 3 falling off, ensuring the integrity of the bolt, and there is no loose part;

[0055] The rear end of the screw rod 1 is provided with a holding head 12, the outer diameter of the holding head 12 is larger than the outer diameter of the threaded rod 11, the holding head 12 is transitionally connected to the threaded rod 11, and the tail wing nut 3 is blocked by the holding head 12 at the rear end of the screw rod 1 when rotating on the screw rod 1, so that the tail wing nut 3 is not easy to fall off, thereby ensuring the integrity of the bolt, and there is no loose part;

[0056] The gripping head 12 is provided with a tying hole 14, and a hand rope is passed through the tying hole 14. The hand rope is used to tie the screw rod 1 to the fastening object, thereby reducing the possibility of the screw rod 1 falling off;

[0057] In this embodiment, the height of the screw rod 1 is 56 mm, the height of the threaded rod 11 is 40 mm, the nominal diameter of the external thread is 3 / 8 inch, 16 threads per inch, the height of the transition connection is 3 mm, the outer diameter of the holding head 12 is 16 mm, the inner diameter of the positioning hole 13 is 4 mm, and the distance between the center and the front end face of the threaded rod 11 is 5 mm, the inner diameter of the tying hole 14 is 8 mm, and the distance between the center and the rear end face of the holding head 12 is 8 mm, and the depth of the receiving groove 15 is 15 mm and the width is 3.5 mm;

[0058] like Figures 3 to 5 As shown, a rotation hole 21 is opened on the deformation pin 2, and the positioning pin 4 passes through the rotation hole 21 to rotate and install the deformation pin 2 in the front end of the screw rod 1;

[0059] In this embodiment, the length of the deforming pin 2 is 16 mm, the width is 8 mm, the thickness is 3.4 mm, the inner diameter of the rotating hole 21 is 4 mm, the distance between the center and the short end face of the deforming pin 2 is 8 mm, and the distance between the center and the long end face is 4 mm;

[0060] like Figure 6 and Figure 7 As shown, the tail wing nut 3 includes a nut 32, a thread groove 34 is formed in the nut 32, and an inner surface of the thread groove 34 is formed with an internal thread;

[0061] The tail wing nut 3 includes an integrated tail wing 31, a nut 32 and a screw washer 33. The screw washer 33 is provided with the nut 32. The nut 32 is provided with a pair of tail wings 31. The tail wing 31 facilitates personnel to rotate the tail wing nut 3. The screw washer 33 increases the sealing and anti-loosening capabilities between the tail wing nut 3 and the fastening object.

[0062] In this embodiment, the height of the tail wing nut 3 is 20 mm, the height of the tail wing 31 is 14 mm, the thickness is 4 mm, the maximum spacing of the inner bevel (the junction of the inner bevel and the outer rounded rectangular surface) is 22 mm, the minimum spacing (the junction of the inner bevel and the nut 32) is 12 mm, the fillet diameter of the outer rounded rectangular surface is 28 mm, the outer diameter of the nut 32 is 14 mm, the nominal diameter of the internal thread is 3 / 8 inch, 16 threads per inch, the height of the screw washer 33 is 2 mm, and the outer diameter is 20 mm;

[0063] like Figure 8 As shown, in this embodiment, the length of the positioning pin 4 is 10 mm and the outer diameter is 4 mm;

[0064] The contact surfaces between the deformable pin 2 and the tail wing nut 3 and the fastening object are all set as anti-slip surfaces, and the anti-slip surfaces are used to enhance the fastening effect when the bolt is locked;

[0065] In this embodiment, all parts of the bolt (screw rod 1, deformation pin 2, tail wing nut 3 and positioning pin 4) are made of medium carbon steel (material of high-strength bolts) and polished.

[0066] A fall prevention fastening method, using the above bolts for fastening, such as Fig. 9 and Fig.10 As shown, the specific steps are as follows:

[0067] The tail wing nut 3 is sleeved on the screw rod 1, and the deforming pin 2 is placed in the screw rod 1. After the holes are aligned, the deforming pin 2 is installed in the screw rod 1 through the positioning pin 4, so that the deforming pin 2 can rotate in the screw rod 1, and the bolt is assembled;

[0068] When installing the integrated top cover cantilever crane control box in the refueling pool, first tie the assembled bolts with hand ropes for standby use. When the cantilever crane control box is placed on the installation platform, rotate the deformed pin 2 in front of the bolt to the "1" shape consistent with the screw 1, insert it into the fastening hole of the foundation channel steel, pass through the fastening hole of the control box, and then rotate the deformed pin 2 in front of the bolt to the "T" shape that is perpendicular to the screw 1. Finally, directly rotate the tail wing nut 3 to tighten it without the help of other tools, and finally achieve the purpose of fastening the control box to the foundation channel steel;

[0069] If necessary, it can be disassembled and assembled repeatedly by reverse operation.

[0070] The above description of the embodiments is to facilitate the understanding and use of the utility model by those skilled in the art. It is obvious that those familiar with the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative work. Therefore, the utility model is not limited to the above embodiments, and improvements and modifications made by those skilled in the art based on the disclosure of the utility model without departing from the scope of the utility model should be within the scope of protection of the utility model.

Claims

1. A fall-proof fastening bolt, characterized in that: The bolt comprises a screw rod (1), a deforming pin (2), a tail wing nut (3) and a positioning pin (4); the tail wing nut (3) is rotatably sleeved on the screw rod (1); the deforming pin (2) is rotatably mounted in the front end of the screw rod (1) via the positioning pin (4); the deforming pin (2) is rotated in the screw rod (1) to a "1"-shaped or "T"-shaped front end; the "1"-shaped front end facilitates the screw rod (1) to pass through the fastening hole of the fastening object; the "T"-shaped front end enables the fastening object to fit.

2. The anti-fall fastening bolt according to claim 1, characterized in that: The front part of the screw rod (1) is arranged as a threaded rod (11), and the outer surface of the threaded rod (11) is provided with external threads.

3. The anti-fall fastening bolt according to claim 2, characterized in that: The front end of the threaded rod (11) is provided with a receiving groove (15), and a deforming pin (2) is installed in the receiving groove (15).

4. The anti-fall fastening bolt according to claim 2, characterized in that: The front end of the threaded rod (11) is provided with a positioning hole (13), and the positioning pin (4) passes through the positioning hole (13) to rotatably install the deformation pin (2) in the front end of the screw rod (1); The deforming pin (2) is provided with a rotation hole (21), and the positioning pin (4) passes through the rotation hole (21) to rotationally install the deforming pin (2) in the front end of the screw rod (1).

5. The anti-fall fastening bolt according to claim 2, characterized in that: The external thread at the front end of the threaded rod (11) is worn after the threaded rod (1), the deforming pin (2), the tail wing nut (3) and the positioning pin (4) are assembled.

6. The anti-fall fastening bolt according to claim 2, characterized in that: The rear end of the screw rod (1) is provided as a holding head (12), the outer diameter of the holding head (12) is larger than the outer diameter of the threaded rod (11), and the holding head (12) is transitionally connected to the threaded rod (11).

7. The anti-fall fastening bolt according to claim 6, characterized in that: The gripping head (12) is provided with a tying hole (14), and a hand rope is passed through the tying hole (14).

8. The anti-fall fastening bolt according to claim 1, characterized in that: The tail wing nut (3) comprises a nut (32), a thread groove (34) is provided in the nut (32), and an inner surface of the thread groove (34) is provided with an internal thread.

9. The anti-fall fastening bolt according to claim 8, characterized in that: The tail wing nut (3) comprises an integrated tail wing (31), a nut (32) and a screw washer (33); the nut (32) is arranged on the screw washer (33), and the tail wing (31) is arranged on the nut (32).

10. The anti-fall fastening bolt according to claim 1, characterized in that: The contact surfaces between the deformable pin (2) and the tail wing nut (3) and the fastening object are both arranged as anti-slip surfaces.

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