Anti-backout double-pull bolt

Abstract

The utility model relates to a kind of anti-tripping opposed-pull bolts. Including straight screw rod, screw rod is passed through a group of opposed-pull reserved holes on template in alignment position;Multiple equidistantly arranged pinholes are respectively arranged in the left part and the right part of screw rod, first mouse ear nut is arranged in the left part of screw rod, second mouse ear nut is arranged in the right part, anti-tripping lock pin is arranged in the pinhole outside first mouse ear nut and multiple washers are arranged between the anti-tripping lock pin and first mouse ear nut, anti-tripping lock pin is arranged in the pinhole outside second mouse ear nut and multiple washers are arranged between the anti-tripping lock pin and second mouse ear nut;It further includes external sheath located at the outside of two templates respectively, external sheath encloses the mouse ear nut of this side and the exposed part of screw rod in internal, it further includes middle sheath, middle sheath encloses the exposed part of screw rod between two templates in internal.The utility model will not appear tripping problem when concrete is vibrated, effectively avoid the problem of not easy to disassemble due to sputtering mortar and solidification.

Description

Technical Field

[0001] This utility model belongs to the field of fastener technology, and in particular relates to an anti-loosening tie bolt. Background Technology

[0002] Currently, large-volume concrete components are frequently encountered in the construction of large-scale structural projects such as bridges and sluices. During the pouring of large-volume concrete, tie rods are required to secure the casting molds, preventing collapse during pouring and setting, and providing preload to ensure the dimensional accuracy of the concrete components. When using traditional tie rods (including a threaded rod and two nuts), resonance between the tie rods and the vibrator during compaction can cause the nuts to loosen, leading to the tie rods coming off their threads and causing mold bulging. To prevent this, several workers are typically assigned to monitor the tie rods during concrete pouring, immediately retightening them if they become loose. However, this method is labor-intensive and does not fundamentally eliminate the problem of tie rod disengagement due to resonance. Furthermore, tie rods need to be reused. During concrete pouring, mortar splashes onto the tie rods and solidifies as the concrete is poured, making subsequent disassembly and reuse difficult.

[0003] In summary, there is a need to develop and design new types of tie bolts for concrete component casting in order to solve the aforementioned technical problems. Utility Model Content

[0004] The purpose of this utility model is to provide a pull-out anti-disengagement bolt that will not disengage during concrete vibration, ensuring the quality of concrete component casting and effectively avoiding the problem of difficult disassembly and assembly caused by splashed mortar and solidification.

[0005] The technical solution adopted by this utility model is as follows: an anti-disengagement tie bolt, comprising a straight threaded rod, the threaded rod passing through a set of tie bolt pre-drilled holes on a template in an aligned position; multiple equally spaced pin holes are provided on the left and right sides of the threaded rod; a first rat-ear nut is provided on the left side of the threaded rod and a second rat-ear nut is provided on the right side, both the first and second rat-ear nuts are located on the outer side of the template on this side; an anti-disengagement locking pin is provided in the pin hole on the outer side of the first rat-ear nut and multiple washers are provided between the anti-disengagement locking pin and the first rat-ear nut; an anti-disengagement locking pin is provided in the pin hole on the outer side of the second rat-ear nut and multiple washers are provided between the anti-disengagement locking pin and the second rat-ear nut; it also includes an outer sheath located on the outer side of the two templates respectively, the outer sheath encloses the exposed portion of the rat-ear nut and the threaded rod on this side inside; it also includes a middle sheath, the middle sheath encloses the exposed portion of the threaded rod between the two templates inside.

[0006] Preferably, the left anti-loosening pin is located in the first pin hole outside the first rat-ear nut, and the right anti-loosening pin is located in the first pin hole outside the second rat-ear nut.

[0007] Preferably, the center lines of each pin hole are parallel and intersect perpendicularly with the center line of the threaded rod.

[0008] Preferably, the anti-loosening locking pin includes a locking pin rod, with a flat cylindrical locking pin head at one end and the outer diameter of the locking pin head being larger than the inner diameter of the pin hole. A groove is provided at the other end of the locking pin rod, and a baffle plate is installed in the groove by means of a pin hinge. The width of the baffle plate is less than or equal to the diameter of the locking pin rod.

[0009] Preferably, a pad is provided between the first rat-ear nut and the template, and a pad is provided between the second rat-ear nut and the template.

[0010] Preferably, the outer sheath includes a sleeve with internal threads and a flared end located at the inner end of the sleeve. The sleeve and the flared end are integrally injection molded structures. The inner wall of the sleeve has internal threads and the sleeve is threaded to the outer exposed part of the threaded rod. The end of the flared end abuts against the outer surface of the template on this side.

[0011] Preferably, the middle sheath is a rubber corrugated pipe.

[0012] The advantages and positive effects of this utility model are:

[0013] This utility model provides an anti-disengagement tie bolt. Compared with existing tie bolts, the tie bolt of this utility model has pin holes on the left and right sides of the threaded rod. After the rat-ear nut is installed on the outside of the template on this side, an anti-disengagement pin is set in the pin hole on the outside, and multiple washers are set between the anti-disengagement pin and the rat-ear nut to provide a positioning and tensioning effect. In this way, during the vibration stage after concrete pouring, the anti-disengagement pin can effectively prevent the rat-ear nut from disengaging under the vibration action, thus effectively preventing the mold from bulging and ensuring the casting quality of the concrete component.

[0014] On the other hand, this anti-disengagement tie bolt has an outer sleeve on its exposed left and right sides and a middle sleeve in the middle. The outer sleeve closes the part of the tie bolt located outside the template, and the middle sleeve closes the part located between the templates. During the casting process, the mortar will not splash onto the threaded rod, rat-ear nut and anti-disengagement pin, but will only splash onto the outer sleeve and the middle sleeve. Therefore, this anti-disengagement tie bolt will not have the problem of being difficult to disassemble and reassemble due to mortar splashing and solidification, allowing the tie bolt to be quickly reused. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the main perspective structure of this utility model;

[0016] Figure 2 yes Figure 1 A schematic diagram of the central locking pin assembly.

[0017] In the picture:

[0018] 1. Pin hole; 2. Threaded rod; 3. Anti-loosening pin; 3-1. Locking pin head; 3-2. Locking pin rod; 3-3. Groove; 3-4. Baffle; 3-5. Pin shaft; 4. Washer; 5. First rat-ear nut; 6. Washer plate; 7. Second rat-ear nut; 8. Template; 9. Outer sheath; 10. Middle sheath. Detailed Implementation

[0019] To further understand the invention content, features and effects of this utility model, the following embodiments are provided in detail.

[0020] Please see Figure 1 The anti-disengagement pull bolt of this utility model includes a straight threaded rod 2, which passes through a set of pull-out pre-drilled holes on a set of templates 8 in alignment positions. A first rat-ear nut 5 is provided on the left side of the threaded rod 2, and a second rat-ear nut 7 is provided on the right side, both located on the outer side of the template 8 on their respective sides. After the threaded rod 2 is inserted into the pull-out pre-drilled holes of the template 8, the first rat-ear nut 5 and the second rat-ear nut 7 are installed on the left and right sides respectively and tightened, generating a pull-out action on the two templates 8 in alignment positions.

[0021] Multiple equally spaced pin holes 1 are provided on the left and right sides of the threaded rod 2. In this embodiment, the center lines of each pin hole 1 are parallel and intersect perpendicularly with the center line of the threaded rod 2, and the inner diameter of each pin hole 1 is equal.

[0022] A locking pin 3 is provided in the pin hole 1 on the outer side of the first rat-ear nut 5, and multiple washers 4 are provided between the locking pin 3 and the first rat-ear nut 5. A locking pin 3 is also provided in the pin hole 1 on the outer side of the second rat-ear nut 7, and multiple washers 4 are provided between the locking pin 3 and the second rat-ear nut 7. The function of the locking pin 3 is to prevent the rat-ear nut on this side from being pulled out. During concrete vibration, due to the anti-loosening limiting effect provided by the two locking pins 3, the first rat-ear nut 5 and the second rat-ear nut 7 cannot move outward, thus effectively ensuring that there will be no pull-out problem or bulging problem. The function of the washers 4 is to occupy and tighten between the locking pin 3 and the rat-ear nut on this side. Before installing the locking pin 3, the number of washers 4 is selected according to the distance between the pin hole 1 and the outer surface of the rat-ear nut. After installing the locking pin 3, the anti-loosening limiting effect provided by the locking pin 3 is applied to the rat-ear nut through the washers 4.

[0023] In this embodiment, the left anti-loosening pin 3 is located in the first pin hole 1 outside the first rat ear nut 5, and the right anti-loosening pin 3 is located in the first pin hole 1 outside the second rat ear nut 7.

[0024] In this embodiment, a pad 6 is provided between the first rat-ear nut 5 and the template 8, and a pad 6 is provided between the second rat-ear nut 7 and the template 8. The radial dimension of the pad 6 is greater than the radial dimension of the inner side surface of the rat-ear nut.

[0025] Please see Figure 2 It can be seen that:

[0026] The anti-loosening locking pin 3 includes a locking rod 3-2, which passes through the pin hole 1. One end of the locking rod 3-2 has a flat cylindrical locking head 3-1 with an outer diameter larger than the inner diameter of the pin hole 1. The other end of the locking rod 3-2 has a groove 3-3. A baffle 3-4 is hinged in the groove 3-3 by a pin 3-5. The width of the baffle 3-4 is less than or equal to the diameter of the locking rod 3-2. The baffle 3-4 can rotate around the pin 3-5, so the baffle 3-4 can switch between being parallel to or perpendicular to the locking rod 3-2.

[0027] During installation, first move the stop plate 3-4 until it is parallel to the locking pin 3-2. Then, pass the stop plate 3-4 and the locking pin 3-2 through the pin hole 1, with the stop plate 3-4 fully protruding from the pin hole 1. Next, move the stop plate 3-4 until it is perpendicular to the locking pin 3-2. In this case, the anti-disengagement pin 3 will not be able to disengage from its pin hole 1. Figure 1 As shown, after installation, the edge of the locking head 3-1 of the anti-loosening pin 3 abuts against the outer surface of the outer pad 4.

[0028] It also includes outer sleeves 9 located on the outside of the two templates 8, which enclose the exposed portion of the rat-ear nut and threaded rod 2 on their respective sides. It also includes a middle sleeve 10, which encloses the exposed portion of the threaded rod 2 between the two templates 8. The purpose of the outer sleeves 9 and the middle sleeve 10 is to cover the main body of the tie bolt, so that during the concrete pouring process, mortar will not splash onto the threaded rod 2, rat-ear nut, and anti-loosening pin 3, but will only splash onto the outer sleeves 9 and the middle sleeve 10. Therefore, this anti-loosening tie bolt will not have the problem of being difficult to disassemble and reassemble due to mortar splashing and solidification, allowing the tie bolt to be quickly reused.

[0029] In this embodiment, the outer sheath 9 includes a sleeve with internal threads and a flared end located at the inner end of the sleeve. The sleeve and the flared end are integrally injection molded structures made of rubber. The inner wall of the sleeve has internal threads, and the sleeve is threadedly connected to the exposed outer part of the threaded rod 2. The end of the flared end abuts against the outer surface of the template 8 on this side. In this embodiment, the middle sheath 10 is a rubber corrugated pipe. The rubber corrugated pipe can expand and contract in the axial direction, thus adapting to the distance between the two templates 8. The rubber outer sheath 9 and the middle sheath 10 are flexible. During the concrete pouring process, mortar will splash onto the outer sheath 9 and the middle sheath 10. After the concrete component hardens, the formwork is demolded, and the anti-disengagement tie bolts are also removed. At this time, the solidified mortar on the surface can be promoted to fall off by hitting the outer sheath 9 and the middle sheath 10.

[0030] How to use:

[0031] The templates 8 are assembled to form a casting mold. A central sheath 10 is set between the templates 8 in the alignment position. Then, threaded rods 2 are inserted into the pre-drilled holes for the tie rods. Next, pads 6 and rat-ear nuts are installed on the outside of each template 8 in sequence and the rat-ear nuts are tightened. Then, the distance between the outer surface of the rat-ear nut and the first pin hole 1 on its outer side is observed, and an appropriate number of washers 4 are selected and installed. Then, anti-loosening pins 3 are installed in the pin holes 1. After the anti-loosening pins 3 are installed, the edge of the locking pin head 3-1 should abut against the outer surface of the washer 4, and the baffle 3-4 should be rotated to a state perpendicular to the locking pin rod 3-2. Then, the outer sheaths 9 are installed on the left and right sides. Specifically, the sleeve of the outer sheath 9 is screwed onto the exposed threaded rod 2. The front part of the flared mouth of the outer sheath 9 should abut against the outer surface of the template 8. At this time, the pads 6, rat-ear bolts, washers 4 and anti-loosening pins 3 are all located inside the flared mouth.

[0032] During disassembly, first remove the two outer sheaths 9 and remove the solidified mortar on the surface by dropping them. Then, rotate the baffle 3-4 of the anti-loosening pin 3 to a position parallel to the locking pin rod 3-2. Then, pull out the anti-loosening pin 3, then remove the washer 4, then remove the rat ear bolt, then remove the pad 6, then pull out the threaded rod 2 from the tie connection hole of the template 8, then remove the middle sheath 10 and remove the solidified mortar on the surface by dropping it.

Claims

1. A pull rod with anti-disengagement capability, comprising a straight threaded rod (2) passing through a set of pull rod pre-drilled holes on a template (8) in an aligned position; characterized in that: Multiple equally spaced pin holes (1) are provided on the left and right sides of the threaded rod (2). A first rat-ear nut (5) is provided on the left side of the threaded rod (2), and a second rat-ear nut (7) is provided on the right side. Both the first rat-ear nut (5) and the second rat-ear nut (7) are located on the outside of the template (8) on this side. An anti-loosening pin (3) is provided in the pin hole (1) outside the first rat-ear nut (5), and multiple washers (4) are provided between the anti-loosening pin (3) and the first rat-ear nut (5). An anti-loosening pin (3) is provided in the pin hole (1) on the outside of the ear nut (7), and multiple washers (4) are provided between the anti-loosening pin (3) and the second mouse ear nut (7); it also includes an outer sleeve (9) located on the outside of the two templates (8), the outer sleeve (9) encloses the exposed part of the mouse ear nut and the threaded rod (2) on this side inside, and also includes a middle sleeve (10), the middle sleeve (10) encloses the exposed part of the threaded rod (2) between the two templates (8) inside.

2. The anti-disengagement tie bolt as described in claim 1, characterized in that: The left anti-loosening pin (3) is located in the first pin hole (1) outside the first rat ear nut (5), and the right anti-loosening pin (3) is located in the first pin hole (1) outside the second rat ear nut (7).

3. The anti-disengagement tie bolt as described in claim 2, characterized in that: The center lines of each pin hole (1) are parallel and intersect perpendicularly with the center line of the threaded rod (2).

4. The anti-disengagement tie bolt as described in claim 3, characterized in that: The anti-loosening locking pin (3) includes a locking pin rod (3-2). At one end of the locking pin rod (3-2), there is a flat cylindrical locking pin head (3-1) with an outer diameter greater than the inner diameter of the pin hole (1). At the other end of the locking pin rod (3-2), there is a groove (3-3). A baffle plate (3-4) is hinged in the groove (3-3) by a pin shaft (3-5). The width of the baffle plate (3-4) is less than or equal to the diameter of the locking pin rod (3-2).

5. The anti-disengagement tie bolt as described in claim 4, characterized in that: in A pad (6) is provided between the first rat-ear nut (5) and the template (8), and a pad (6) is provided between the second rat-ear nut (7) and the template (8).

6. The anti-disengagement tie bolt as described in claim 5, characterized in that: The outer sheath (9) includes a sleeve with internal threads and a flared end located at the inner end of the sleeve. The sleeve and the flared end are integrally injection molded structures. The inner wall of the sleeve has internal threads and the sleeve is threaded to the exposed part of the threaded rod (2). The end of the flared end abuts against the outer surface of the template (8) on this side.

7. The anti-disengagement tie bolt as described in claim 6, characterized in that: The middle sheath (10) is a rubber corrugated pipe.

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