A pull-resistant device

Abstract

The application belongs to the field of building anti-seismic, and particularly relates to a tension-resisting device, which comprises a first tension-resisting module, a second tension-resisting module and a tension-resisting energy dissipation module; wherein the first tension-resisting module comprises a first cross beam, a first connecting frame arranged on the first cross beam and used for connecting a building, and a first limiting assembly fixedly arranged on one side of the first cross beam, and the inner side of the first limiting assembly is a first limiting area. The tension-resisting energy dissipation module is limited in a certain area by the first limiting assembly and a second limiting assembly, and the sliding directions of the first tension-resisting module and the second tension-resisting module relative to the tension-resisting energy dissipation module intersect. When the building moves transversely beyond a limited displacement, the first limiting assembly and the second limiting assembly collide with the tension-resisting energy dissipation module in different directions, shear pins are sheared, seismic energy is dissipated, and the building is protected, and meanwhile, the overall structure of the tension-resisting device is also protected from failure.

Description

Technical Field

[0001] This application belongs to the field of earthquake-resistant building, specifically relating to an anti-pull-out device. Background Technology

[0002] Pull-out protection devices are used to resist external tensile or lifting forces, ensuring structural stability. These devices are crucial in the construction industry, especially in situations requiring resistance to wind, seismic forces, or other forces that could cause buildings to be uplifted. For example, in areas with poor geological conditions or high risk of severe storms and earthquakes, pull-out protection devices may be incorporated into the foundation design of buildings to enhance safety.

[0003] Existing pull-out protection devices have upper and lower structures capable of lateral displacement within a certain range to counteract the damage caused by lateral movement of the building. However, if the lateral movement of the building exceeds the limits of the displacement of the upper and lower structures, the pull-out protection device is more likely to fail. Summary of the Invention

[0004] The technical problem to be solved by this application is to provide an anti-pull-out device that resists lateral forces and restricts displacement by shearing an energy-dissipating structure, can be sheared to dissipate energy under extreme conditions, and protects the overall structure of the anti-pull-out device from failure.

[0005] This application provides an anti-pull-out device, comprising: The first anti-pull-out module includes a first crossbeam, a first connecting frame disposed on the first crossbeam for connecting to the building, and a first limiting component fixedly disposed on one side of the first crossbeam, wherein the inner side of the first limiting component is a first limiting area. The second anti-pull-out module includes a second crossbeam, a second connecting frame disposed on the second crossbeam for connecting to the building, and a second limiting component fixedly disposed on one side of the second crossbeam. The inner side of the second limiting component is a second limiting area. The second crossbeam and the first crossbeam are intersected. The first limiting component and the second limiting component are distributed opposite to each other. The pull-out energy dissipation module includes a first sliding member slidably disposed on the first limiting component and located in the first limiting area, a second sliding member slidably disposed on the second limiting component and located in the second limiting area, and a plurality of anti-shear pins with their two ends respectively inserted into the first sliding member and the second sliding member, wherein the sliding direction of the first sliding member intersects the sliding direction of the second sliding member.

[0006] Optionally, the sliding direction of the first slider is perpendicular to the sliding direction of the second slider.

[0007] Optionally, the second crossbeam is distributed in a cross shape with the first crossbeam, and the second crossbeam is located below the first crossbeam. In use, the first connecting frame and the second connecting frame are respectively connected to the lower structure and the upper structure of the building.

[0008] Optionally, the first limiting component includes two first guide members arranged in parallel and two first blocking members disposed between the two first guide members. The two first guide members and the two first blocking members together form a rectangular first limiting area, and the first sliding member slides in cooperation with the two first guide members.

[0009] Optionally, the second limiting component includes two parallel second guide members and two second blocking members disposed between the two second guide members. The two second guide members and the two second blocking members together form a rectangular second limiting area, and the second sliding member slides in cooperation with the two second guide members.

[0010] Optionally, the first blocking member includes one or more staggered first blocks and a first energy-dissipating bolt for fixing the first blocks, wherein the first blocks are fixed to the first crossbeam by the first energy-dissipating bolt.

[0011] Optionally, the second blocking member includes one or more staggered second blocks and a second energy-dissipating bolt for fixing the second blocks, wherein the second blocks are fixed to the second crossbeam by the second energy-dissipating bolt.

[0012] Optionally, there is a gap between the first slider and the second slider, and the opposing surfaces of the first slider and the second slider have a mounting groove, in which a pressure sensor is disposed.

[0013] Optionally, wear-resistant plates are provided on the opposite sides of the first and second sliding members, and a first mirror stainless steel plate and a second mirror stainless steel plate that cooperate with the wear-resistant plates are respectively provided on the first and second crossbeams.

[0014] Optionally, the first limiting component is provided with a first wear-resistant strip on both sides along the sliding direction of the first sliding member, and the first sliding member is provided with a first stainless steel strip that cooperates with the first wear-resistant strip on both sides along its own sliding direction; the second limiting component is provided with a second wear-resistant strip on both sides along the sliding direction of the second sliding member, and the second sliding member is provided with a second stainless steel strip that cooperates with the second wear-resistant strip on both sides along its own sliding direction.

[0015] Optionally, two first connecting frames are respectively connected to the two ends near the first crossbeam and form a U-shaped structure, and two second connecting frames are respectively connected to the two ends near the second crossbeam and form a U-shaped structure. Both the first connecting frames and the second connecting frames have multiple bolt holes for bolt connection with the building.

[0016] The beneficial effect of this application is that the pull-out resistance device provided by this application has pull-out resistance energy dissipation modules that are respectively limited to a certain area by a first limiting component and a second limiting component. The sliding directions of the first pull-out resistance module and the second pull-out resistance module relative to the pull-out resistance energy dissipation module intersect. When the lateral movement of the building exceeds the limited displacement (such as in an earthquake), the first limiting component and the second limiting component will collide with the pull-out resistance energy dissipation module in different directions, thereby shearing the anti-shear pin and dissipating the seismic energy, protecting the building and also protecting the overall structure of the pull-out resistance device from failure. The pull-out resistance energy dissipation module can be removed and the anti-shear pin replaced by removing the first limiting component and the second limiting component. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the anti-pull-out device provided in the embodiments of this application; Figure 2 This is a schematic diagram of the longitudinal section of the anti-pull-out device provided in the embodiments of this application; Figure 3 for Figure 2 Enlarged view of area A in the image; Figure 4 A three-dimensional structural schematic diagram of another anti-pull-out device provided in an embodiment of this application.

[0018] In the diagram: 110, First crossbeam; 120, First connecting frame; 130, First limiting component; 131, First guide component; 132, First stop block; 133, First energy-dissipating bolt; 134, First stainless steel strip; 140, First mirror stainless steel plate; 210, Second crossbeam; 220, Second connecting frame; 230, Second limiting component; 231, Second guide component; 232, Second stop block; 233, Second energy-dissipating bolt; 234, Second stainless steel strip; 240, Second mirror stainless steel plate; 310, First sliding component; 320, Second sliding component; 330, Anti-shear pin; 340, Wear-resistant plate; 350, Second wear-resistant strip; 400, Pressure sensor. Detailed Implementation

[0019] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0020] like Figure 1-4 As shown, this application provides an anti-pull-out device, comprising: a first anti-pull-out module, a second anti-pull-out module, and an anti-pull-out energy dissipation module; wherein, the first anti-pull-out module includes a first crossbeam 110, a first connecting frame 120 disposed on the first crossbeam 110 for connecting to a building, and a first limiting component 130 fixedly disposed on one side of the first crossbeam 110, the inner side of the first limiting component 130 being a first limiting area; the second anti-pull-out module includes a second crossbeam 210, a second connecting frame 220 disposed on the second crossbeam 210 for connecting to a building, and a second limiting component 230 fixedly disposed on one side of the second crossbeam 210, the first limiting component 230 being a first limiting area; the second anti-pull-out module includes a second crossbeam 210, a second connecting frame 220 disposed on the second crossbeam 210 for connecting to a building, and a second limiting component 230 fixedly disposed on one side of the second crossbeam 210, the second limiting component 220 being a first limiting area; the second limiting component 220 being a first limiting area; the third limiting component 230 being a first limiting area; the second limiting component 220 being a first limiting area; the second limiting component 220 being a second limiting frame ... The inner side of the second limiting component 230 is the second limiting area. The second crossbeam 210 and the first crossbeam 110 are intersected. The first limiting component 130 and the second limiting component 230 are distributed opposite to each other. The pull-out energy dissipation module includes a first sliding member 310 slidably disposed on the first limiting component 130 and located in the first limiting area, a second sliding member 320 slidably disposed on the second limiting component 230 and located in the second limiting area, and a plurality of anti-shear pins 330 with their two ends respectively inserted into the first sliding member 310 and the second sliding member 320. The sliding directions of the first pull-out module and the second pull-out module relative to the pull-out energy dissipation module are intersected.

[0021] Compared with the prior art, the pull-out resistance device provided in this application restricts the pull-out resistance energy dissipation module to a certain area by the first limiting component 130 and the second limiting component 230. The sliding directions of the first pull-out resistance module and the second pull-out resistance module relative to the pull-out resistance energy dissipation module intersect. When the lateral movement of the building exceeds the limited displacement (such as in an earthquake), the first limiting component 130 and the second limiting component 230 will collide with the pull-out resistance energy dissipation module in different directions, shearing the anti-shear pin 330 and dissipating the seismic energy, thus protecting the building and the overall structure of the pull-out resistance device from failure. The pull-out resistance energy dissipation module can be removed and the anti-shear pin 330 replaced by removing the first limiting component 130 and the second limiting component 230.

[0022] In one possible implementation, the sliding directions of the first and second anti-pull-out modules relative to the anti-pull-out energy dissipation modules are perpendicular. Specifically, the first anti-pull-out module constrains one direction (e.g., the X-axis), and the second anti-pull-out module constrains the direction perpendicular to it (e.g., the Y-axis). The combination of these two measures achieves displacement constraints on the structure in two orthogonal directions within the plane. In practical applications (such as earthquakes and wind-induced vibrations), the load directions are complex and varied, potentially originating from any horizontal direction. This vertically arranged anti-pull-out module effectively prevents unexpected and excessive relative sliding or pull-out of the energy dissipation module in any horizontal direction, significantly improving the in-plane stiffness and stability of the entire connection node or energy dissipation device.

[0023] In one possible implementation, the second crossbeam 210 is arranged in a cross shape with the first crossbeam 110, and the second crossbeam 210 is located below the first crossbeam 110. In use, the first connecting frame 120 and the second connecting frame 220 are connected to the substructure and superstructure of the building, respectively. Specifically, the cross arrangement of the first crossbeam 110 (typically representing a direction, such as the X-direction) and the second crossbeam 210 (perpendicular to it, such as the Y-direction) allows the entire device to provide restraint, guide sliding, or trigger energy dissipation mechanisms in all directions (360°) in the horizontal plane. The device can operate effectively regardless of the horizontal direction from which the seismic wave originates. It provides omnidirectional seismic protection, overcoming the limitation of unidirectional devices that can only resist seismic forces in a specific direction, and significantly improving the safety of the structure. Construct a stable, controllable, and multi-directional energy-dissipating sliding / rotating interface to flexibly connect or dissipate energy between the upper and lower structures of a building in the horizontal direction. This allows for controllable relative displacement between the two structures under horizontal forces (such as seismic forces and wind loads), while effectively transferring vertical loads and dissipating seismic energy, thereby protecting the main structure.

[0024] In one possible implementation, the first limiting component 130 includes two parallel first guide members 131 and two first blocking members disposed between the two first guide members 131. The two first guide members 131 and the two first blocking members together form a rectangular first limiting area. A first sliding member 310 is slidably engaged with the two first guide members 131. Specifically, the two first guide members 131 can be rectangular columnar structures, detachably fixed to the first crossbeam 110 by bolts. The two first blocking members can be rectangular block structures, detachably fixed to the first crossbeam 110 by bolts. The first guide members 131 and the first blocking members are perpendicular to each other, and the two sides of the first sliding member 310 are slidably engaged with the two first guide members 131 respectively. The detachable two first guide members 131 and two first blocking members facilitate the replacement of the anti-shear pin 330 in the pull-out energy dissipation module.

[0025] In one possible implementation, the second limiting component 230 includes two parallel second guide members 231 and two second blocking members disposed between the two second guide members 231. The two second guide members 231 and the two second blocking members together form a rectangular second limiting area. The second sliding member 320 is slidably engaged with the two second guide members 231. Specifically, the two second guide members 231 can be rectangular columnar structures, detachably fixed to the second crossbeam 210 by bolts. The two second blocking members can be rectangular block structures, detachably fixed to the second crossbeam 210 by bolts. The second guide members 231 and the second blocking members are perpendicular to each other, and the two sides of the second sliding member 320 are slidably engaged with the two second guide members 231 respectively. The detachable two second guide members 231 and two second blocking members facilitate the replacement of the anti-shear pin 330 in the pull-out energy dissipation module.

[0026] In one possible implementation, the first blocking element includes a first block 132 and a first energy-dissipating bolt 133 for fixing the first block 132. The first block 132 is fixed to the first crossbeam 110 by the first energy-dissipating bolt 133, and the first energy-dissipating bolt 133 cuts off and dissipates seismic energy, thereby protecting the main structure.

[0027] In another possible implementation, such as Figure 4As shown, the first blocking component includes multiple staggered first blocks 132 and first energy-dissipating bolts 133 for fixing the first blocks 132. The first blocks 132 are fixed to the first crossbeam 110 by the first energy-dissipating bolts 133, thereby forming a multi-stage energy-dissipating structure. The second blocking component includes one or more staggered second blocks 232 and second energy-dissipating bolts 233 for fixing the second blocks 232. The second blocks 232 are fixed to the second crossbeam 210 by the second energy-dissipating bolts 233. Specifically, the multiple first stops 132 are not arranged on the same straight line perpendicular to the sliding direction, but are staggered at a certain distance along the length of the first crossbeam 110 (i.e., the expected sliding path direction). Each first stop 132 is equipped with an independent first energy-dissipating bolt 133 to fix it to the first crossbeam 110. Similarly, the multiple second stops 232 are not arranged on the same straight line perpendicular to the sliding direction, but are staggered at a certain distance along the length of the second crossbeam 210 (i.e., the expected sliding path direction). Each second stop 232 is equipped with an independent second energy-dissipating bolt 233 to fix it to the second crossbeam 210. The energy-dissipating bolts (referring to the first energy-dissipating bolt 133 and the second energy-dissipating bolt 233) are sacrificial / yielding elements. Their core function is not to provide infinitely strong rigid constraints, but to undergo controlled plastic deformation (yielding) or fracture when subjected to loads exceeding their design threshold. This deformation or fracture process absorbs and dissipates a large amount of seismic energy. It has a multi-level triggering mechanism: Initial state: During minor earthquakes or wind-induced vibrations, the relative displacement is small. At this point, all the stops and energy-dissipating bolts work together to provide initial stiffness and a small constraint force, and the structure remains essentially elastic. First-stage energy dissipation: When the relative displacement (e.g., the second beam 210 causing the tensile energy-dissipating module to slide relative to the first beam 110) increases to the design displacement threshold of the first stop, the shear or tensile force borne by the first energy-dissipating bolt corresponding to that stop reaches its yield strength. This bolt begins to undergo significant plastic deformation, consuming a large amount of energy, while the constraint force provided by the stop reaches its peak and begins to "soften" (i.e., the constraint stiffness decreases). Second-stage energy dissipation: The relative displacement continues to increase, reaching the design displacement threshold of the second (staggered) stop. At this point, the first energy-dissipating bolt may have been severely deformed or is close to failure, and the second energy-dissipating bolt begins to enter the yield energy dissipation stage. This process continues progressively: as the relative displacement continues to increase, the energy-dissipating bolts corresponding to the stops reach their yield points and begin dissipating energy in sequence according to their staggered distances. This forms a stepped, graded energy dissipation sequence to cope with earthquakes of different magnitudes. The stop block itself is relatively rigid. Even if the corresponding energy-dissipating bolt yields or breaks, the physical existence of the stop block itself can still play a mechanical limiting role, preventing the relative displacement from increasing indefinitely and protecting the main structure and device itself from destructive displacement damage. The energy dissipation of the bolt occurs during the process of the displacement reaching the stop block position and attempting to push the stop block.

[0028] In one possible implementation, such as Figure 2 As shown, there is a gap between the first sliding member 310 and the second sliding member 320. The opposing surfaces of the first sliding member 310 and the second sliding member 320 have mounting grooves, and a pressure sensor 400 is installed in the mounting grooves. The tensile force is converted into compressive force. The pressure sensor 400, located in the middle of the pull-out energy dissipation module, monitors the tensile force borne by the pull-out device in real time. During an earthquake, it monitors the tensile force on the building structure. This monitoring data can then be used to drive the seismic isolation design of the building. For example, the tensile stress is usually designed at 1.5 MPa based on finite element simulation analysis results, but actual working conditions may not be as precise. By monitoring, actual data can be obtained, allowing for the reverse optimization of the building's seismic isolation design. Compared to a tensile sensor, the pressure sensor 400 is lower in cost and has a larger measuring range; converting tensile force into compressive force reduces costs.

[0029] In one possible implementation, such as Figure 3 As shown, wear-resistant plates 340 are provided on the opposite sides of the first sliding member 310 and the second sliding member 320. First mirror-finish stainless steel plates 140 and 240, respectively, are provided on the first crossbeam 110 and the second crossbeam 210 to mate with the wear-resistant plates 340. Specifically, the wear-resistant plates 340 can be made of polytetrafluoroethylene and its composite materials, ultra-high molecular weight polyethylene, etc., while the first mirror-finish stainless steel plates 140 and 240 can be made of austenitic stainless steel (such as 304 or 316L), with surfaces precision polished to achieve a mirror-like finish. The wear-resistant plates 340 are in direct contact with the first mirror-finish stainless steel plates 140 and 240, forming a sliding interface. When the first crossbeam 110 and the second crossbeam 210 undergo relative displacement (such as under earthquake conditions), the wear-resistant plates 340 slide on the surface of the mirror-finish stainless steel plates. This significantly reduces the force required to initiate (start) and maintain the sliding of the device. This makes the structural system more "sensitive," enabling it to activate the seismic isolation / energy dissipation mechanism under relatively small earthquake loads; at the same time, it reduces the resistance during the sliding process, which is conducive to achieving a larger design displacement and improving the seismic isolation / energy dissipation effect.

[0030] In one possible implementation, such as Figure 3As shown, the first limiting component 130 has first wear-resistant strips on both sides along the sliding direction of the first sliding member 310, and the first sliding member 310 has first stainless steel strips 134 on both sides along its own sliding direction that cooperate with the first wear-resistant strips; the second limiting component 230 has second wear-resistant strips 350 on both sides along the sliding direction of the second sliding member 320, and the second sliding member 320 has second stainless steel strips 234 on both sides along its own sliding direction that cooperate with the second wear-resistant strips 350. Specifically, the first wear-resistant strips and the second wear-resistant strips 350 can be made of polytetrafluoroethylene and its composite materials, ultra-high molecular weight polyethylene, etc., and the first stainless steel strips 134 and 234 can be made of austenitic stainless steel (such as 304, 316L), with surfaces precision polished to achieve mirror-level finish. The first wear-resistant strip is in direct contact with the first stainless steel strip 134, and the second wear-resistant strip 350 is in direct contact with the second stainless steel strip 234, forming a sliding interface. When the first crossbeam 110 and the second crossbeam 210 undergo relative displacement (such as under seismic loading), the wear-resistant strip slides on the surface of the stainless steel strip. This significantly reduces the force required to initiate (activate) and maintain the sliding of the device. It makes the structural system more "sensitive," enabling the seismic isolation / energy dissipation mechanism to be activated even under relatively small seismic loading; simultaneously, it reduces resistance during the sliding process, facilitating the achievement of larger design displacements and improving the seismic isolation / energy dissipation effect.

[0031] In one possible implementation, two first connecting frames 120 are respectively connected to the two ends near the first crossbeam 110, forming a U-shaped structure, and two second connecting frames 220 are respectively connected to the two ends near the second crossbeam 210, forming a U-shaped structure. Both the first connecting frames 120 and the second connecting frames 220 have multiple bolt holes for bolted connection to the building. The material's compressive strength is higher than its tensile strength, which reduces the size of the intermediate connection section and improves the tensile strength of the device.

[0032] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of protection of this application is limited to these examples; within the framework of this application, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of one or more embodiments of this application as described above, which are not provided in detail for the sake of brevity.

[0033] One or more embodiments in this application are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of this application. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of one or more embodiments in this application should be included within the protection scope of this application.

Claims

1. A pull-out resistant device, characterized in that, include: The first anti-pull-out module includes a first crossbeam (110), a first connecting frame (120) disposed on the first crossbeam (110) for connecting the building, and a first limiting component (130) fixedly disposed on one side of the first crossbeam (110), wherein the inner side of the first limiting component (130) is a first limiting area; The second anti-pull-out module includes a second crossbeam (210), a second connecting frame (220) disposed on the second crossbeam (210) for connecting the building, and a second limiting component (230) fixedly disposed on one side of the second crossbeam (210). The inner side of the second limiting component (230) is a second limiting area. The second crossbeam (210) and the first crossbeam (110) are intersected. The first limiting component (130) and the second limiting component (230) are distributed opposite to each other. The pull-out resistance energy dissipation module includes a first sliding member (310) slidably disposed on the first limiting component (130) and located in the first limiting area, a second sliding member (320) slidably disposed on the second limiting component (230) and located in the second limiting area, and a plurality of anti-shear pins (330) with their two ends respectively inserted into the first sliding member (310) and the second sliding member (320). The sliding directions of the first pull-out resistance module and the second pull-out resistance module relative to the pull-out resistance energy dissipation module intersect. The first limiting component (130) includes two first guide members (131) arranged in parallel and two first blocking members disposed between the two first guide members (131). The two first guide members (131) and the two first blocking members enclose a rectangular first limiting area. The first sliding member (310) slides with the two first guide members (131). The second limiting component (230) includes two parallel second guide members (231) and two second blocking members disposed between the two second guide members (231). The two second guide members (231) and the two second blocking members together form a rectangular second limiting area. The second sliding member (320) slides in cooperation with the two second guide members (231). The first blocking member includes one or more staggered first blocks (132) and a first energy-dissipating bolt (133) for fixing the first blocks (132). The first blocks (132) are fixed to the first crossbeam (110) by the first energy-dissipating bolt (133). The second blocking member includes one or more staggered second blocks (232) and a second energy-dissipating bolt (233) for fixing the second block (232). The second block (232) is fixed to the second crossbeam (210) by the second energy-dissipating bolt (233).

2. The anti-pull-out device according to claim 1, characterized in that, The sliding direction of the first slider (310) is perpendicular to the sliding direction of the second slider (320).

3. The anti-pull-out device according to claim 2, characterized in that, The second crossbeam (210) is distributed in a cross shape with the first crossbeam (110), and the second crossbeam (210) is located below the first crossbeam (110). When in use, the first connecting frame (120) and the second connecting frame (220) are respectively connected to the lower structure and the upper structure of the building.

4. The anti-pull-out device according to any one of claims 1-3, characterized in that, There is a gap between the first sliding member (310) and the second sliding member (320), and the opposite surfaces of the first sliding member (310) and the second sliding member (320) have mounting grooves, and a pressure sensor (400) is provided in the mounting grooves.

5. The anti-pull-out device according to any one of claims 1-3, characterized in that, The first sliding member (310) and the second sliding member (320) are provided with wear-resistant plates (340) on their opposite sides. The first crossbeam (110) and the second crossbeam (210) are respectively provided with a first mirror stainless steel plate (140) and a second mirror stainless steel plate (240) that cooperate with the wear-resistant plates (340).

6. The anti-pull-out device according to claim 5, characterized in that, The first limiting component (130) is provided with a first wear-resistant strip on both sides along the sliding direction of the first sliding member (310), and the first sliding member (310) is provided with a first stainless steel strip (134) cooperating with the first wear-resistant strip on both sides along its own sliding direction; the second limiting component (230) is provided with a second wear-resistant strip (350) on both sides along the sliding direction of the second sliding member (320), and the second sliding member (320) is provided with a second stainless steel strip (234) cooperating with the second wear-resistant strip (350) on both sides along its own sliding direction.

7. The anti-pull-out device according to any one of claims 1-3, characterized in that, Two first connecting frames (120) are respectively connected to the two ends near the first crossbeam (110) and form a U-shaped structure. Two second connecting frames (220) are respectively connected to the two ends near the second crossbeam (210) and form a U-shaped structure. Both the first connecting frame (120) and the second connecting frame (220) have multiple bolt holes for connecting to the building by bolts.

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