Energy-absorbing large-buffering type anti-falling beam device and construction method thereof

Abstract

The invention relates to an energy-absorbing large-buffering type anti-falling beam device and a construction method thereof. An existing anti-falling beam device has the problems that the function is single, the energy absorption capacity is not constant, and an energy absorption device cannot stop returning. The beam falling prevention device is longitudinally arranged between two rows of T-beams, and is mounted on the inner sides of the bottoms of the T-beams on the two sides through two anchoring baffles which are longitudinally arranged front and back; comprising an energy absorption end assembly, an anchor cable and a buffering end assembly, the energy absorption end assembly is connected with the buffering end assembly through the anchor cable, and the energy absorption end assembly and the buffering end assembly are fixed to two anchoring baffles longitudinally arranged front and back respectively. The anti-falling beam device is multifunctional, has the buffering and energy absorbing functions, and can continuously and smoothly absorb instant impact energy, so that the anti-falling beam device has more stable energy absorbing performance; meanwhile, the anti-beam-falling device is provided with a non-return device, the anti-beam-falling device is not prone to being ejected out from the rear portion to generate unpredictable harm after being broken, and the anti-beam-falling device is safer and more reliable.

Description

Technical Field

[0001] The invention relates to the technical field of bridge construction, and in particular to an energy-absorbing and large-buffer type anti-falling beam device and a construction method thereof. Background Art

[0002] The bridge beam is supported by supports on the top of the piers. In order to prevent the beam surface from shifting and falling off the supports, some anti-beam falling measures are generally taken to ensure the safety of the structure.

[0003] At present, the more common anti-falling beam device is the steel strand cable type anti-falling beam device. This device has various forms, including simple structure type and buffer energy absorption type, but they all have some shortcomings. Among them, the simple structure type device structure does not have a buffer energy absorption function. In special circumstances such as earthquakes, the beam body will produce an instantaneous impact, and the anti-falling beam is prone to break and fail. The buffer energy absorption type device structure mostly uses wedge-shaped extrusion deformation to absorb energy. During the energy absorption process, the energy absorption is not constant, but the more energy is absorbed, the greater the energy absorption is. When an instantaneous impact occurs, the energy absorption tube is prone to burst damage. In addition, the energy absorption device does not have a check device. After the anti-falling beam breaks, it is easy to eject from the rear, causing unforeseen hazards.

[0004] Therefore, it is necessary to propose new measures to overcome the above-mentioned defects. Summary of the invention

[0005] The purpose of the present invention is to provide an energy-absorbing and large-buffer type anti-falling beam device and a construction method thereof, so as to solve the problems of the existing steel strand cable type anti-falling beam device, such as single function, unstable energy absorption and inability to stop the energy absorption device.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is:

[0007] An energy-absorbing and large-buffer type anti-falling beam device, which is longitudinally arranged between two rows of T-beams and is respectively installed on the inner sides of the bottoms of the T-beams on both sides through two anchoring baffles arranged longitudinally front and back;

[0008] The anti-falling beam device includes an energy absorbing end assembly, an anchor cable and a buffer end assembly. The energy absorbing end assembly is connected to the buffer end assembly through the anchor cable. The energy absorbing end assembly and the buffer end assembly are respectively fixed to two anchor baffles arranged longitudinally front and back.

[0009] Furthermore, a T-beam partition is preset on the inner side of the bottom of the T-beam, and the T-beam partitions on both sides are arranged opposite to each other in the transverse direction. The inner sides of both ends of the anchoring baffle are respectively fixed to the longitudinal outer end faces of the T-beam partitions on both sides.

[0010] Further, the energy absorbing end assembly includes an energy absorbing tube, an energy absorbing rod, a spring, an energy absorbing end stop plate, a nut and an energy absorbing end protective cover;

[0011] The energy absorbing tube is fixed to the longitudinal outer side of the anchor baffle, the energy absorbing end protection cover is fixed to the longitudinal outer side of the energy absorbing tube, and the energy absorbing rod, the spring, the energy absorbing end stop plate and the nut are located inside the energy absorbing tube and the energy absorbing end protection cover;

[0012] One end of the anchor cable passes through the anchor baffle, and is sequentially inserted into the energy absorbing tube, the energy absorbing rod, the spring and the energy absorbing end stop plate, and the nut is installed at the end;

[0013] The energy absorbing rod is located in the energy absorbing tube, and the two ends of the spring are respectively limited to the energy absorbing end stop plate and the energy absorbing rod.

[0014] Furthermore, the inner diameter of the energy absorbing tube at one end close to the energy absorbing end stop plate is larger than the inner diameter of the energy absorbing tube at one end close to the anchoring baffle plate;

[0015] At the inner diameter change position in the energy absorbing cylinder, the movement of the energy absorbing rod toward the anchor baffle is restricted.

[0016] Furthermore, the energy absorbing end protection cover gradually shrinks longitudinally outward from the energy absorbing tube, and the longitudinal outward movement of the energy absorbing end stop plate is restricted.

[0017] Furthermore, a steel baffle is provided between the outer side of the anchor baffle and the energy absorbing tube.

[0018] Furthermore, a radial hole is provided on the rod wall of the energy absorbing rod, and a non-return device is provided in the radial hole;

[0019] The non-return device comprises a non-return column and a return spring, wherein the return spring is located radially outside the non-return column;

[0020] The radial outer end of the check column has an enlarged head, and the radial inner end of the radial hole has a reduced orifice.

[0021] Further, the buffer end assembly includes a buffer, a tower spring, a buffer end stop plate, a nut and a buffer end protective cover;

[0022] The buffer end protection cover is fixed to the longitudinal outer side of the anchor baffle, and the buffer, the tower spring and the buffer end stop plate are located inside the buffer end protection cover;

[0023] The other end of the anchor cable passes through the anchor baffle, and is inserted into the buffer, the tower spring and the buffer end stop plate in sequence, and the nut is installed at the end.

[0024] Furthermore, the buffer end protection cover gradually shrinks outward from the anchor baffle plate, and the movement of the buffer end stop plate in the buffer end protection cover in the opposite direction to the anchor baffle plate is restricted.

[0025] On the other hand, a construction method of an energy-absorbing and large-buffering anti-falling beam device is provided, the construction method comprising:

[0026] Install anchor baffles on the T-beam partition, two in the longitudinal direction;

[0027] Pass one end of the anchor cable through an anchor baffle and install the energy absorbing end assembly; pass the other end of the anchor cable through another anchor baffle and install the buffer end assembly;

[0028] When the T-beam moves, one end of the anchor cable where the energy-absorbing end assembly is installed moves to the side opposite to the anchor baffle, the spring plays an energy-absorbing role, and the tower-shaped spring plays a buffering role;

[0029] When one end of the anchor cable continues to move to the outside of the non-return device, the reset spring stretches, pushing the reset column to the reduced opening of the radial hole and exposing it outside, clamping the energy absorbing rod and playing a non-return role.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] The present invention provides an energy-absorbing and large-buffer type anti-falling beam device and a construction method thereof. The anti-falling beam device is a multifunctional anti-falling beam device with a buffering and energy-absorbing function, which can continuously and smoothly absorb instantaneous impact energy, so that the anti-falling beam device has a more stable energy-absorbing performance. At the same time, the anti-falling beam device of the present invention has a non-return device, which is not easy to eject from the rear after breaking to cause unforeseen hazards, and is safer and more reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, drawings of other embodiments can be obtained based on these drawings without paying creative work.

[0033] Figure 1 It is an elevation view of the present invention.

[0034] Figure 2 It is a stereogram of the present invention (excluding the energy absorbing end assembly).

[0035] Figure 3 It is a plan view of the present invention.

[0036] Figure 4 It is an enlarged view of the non-return device of the present invention.

[0037] The symbols in the figure are:

[0038] 1-T beam, 2-anchor baffle, 3-T beam partition, 4-anti-beam drop device;

[0039] 41-energy absorbing end protection cover, 42-nut, 43-energy absorbing end stop plate, 44-spring, 45-check device, 46-energy absorbing rod, 47-energy absorbing cylinder, 48-steel baffle, 49-anchor cable, 410-buffer, 411-tower spring, 412-buffer end stop plate, 413-buffer end protection cover. DETAILED DESCRIPTION

[0040] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thoroughly understood.

[0041] In the description of the present invention, it is necessary to understand that the terms "longitudinal", "lateral", "front", "rear", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention 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 invention.

[0042] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "set" and the like should be understood in a broad sense, for example, they can be fixedly connected or set, or detachably connected or set, or integrally connected or set. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] It should also be noted that although the order of steps is mentioned in the method description, in some cases, they may be performed in an order different from that shown here, and this should not be construed as a limitation on the order of the steps.

[0044] In a specific implementation, the line direction, i.e. the direction of the anchor cable 49, is defined as the longitudinal direction, the direction perpendicular thereto is defined as the transverse direction, one side of the energy absorbing end assembly is defined as the front, and one side of the buffer end assembly is defined as the rear.

[0045] like Figure 1-3The present invention provides an energy-absorbing and large-buffering anti-beam-falling device, which is a non-destructive post-installed equipment that can be installed on a bridge that has been completed or is already in operation. It can continuously and smoothly absorb instantaneous impact energy and has a non-return safety function.

[0046] like Figure 1 and Figure 2 The bridge includes two rows of T-beams 1 arranged symmetrically in the longitudinal direction, and a T-beam partition 3 is preset on the inner side of the bottom of the T-beam 1. It is constructed together when the T-beam 1 is prefabricated or cast in place, and is an integral structure with the T-beam 1. The T-beams 1 on both sides of the transverse direction have T-beam partitions 3, and the T-beam partitions 3 on both sides are arranged laterally opposite to each other. The anti-falling beam device 4 of the present invention is arranged longitudinally between the two rows of T-beams 1, and is mainly installed with the help of four T-beam partitions 3 and two anchor baffles 2. The two anchor baffles 2 are arranged longitudinally front and back, and the rear side surfaces of the front anchor baffle 2 on both sides of the transverse direction are respectively fixed to the front end surface of the first group of T-beam partitions 3 on both sides of the transverse direction, and the front side surfaces of the rear anchor baffle 2 on both sides of the transverse direction are respectively fixed to the rear end surface of the second group of T-beam partitions 3 on both sides of the transverse direction. Based on the four T-beam partitions 3 on the left and right sides of the transverse direction and the two anchor baffles 2 on the front and rear sides of the longitudinal direction, the anti-falling beam device 4 can be longitudinally installed to the inner side of the bottom of the T-beams 1 on both sides.

[0047] Specifically, the anti-falling beam device 4 of the present invention includes an energy absorbing end assembly, an anchor cable 49 and a buffer end assembly, and the energy absorbing end assembly is connected to the buffer end assembly through the anchor cable 49, and is arranged longitudinally front and back in sequence. The energy absorbing end assembly and the buffer end assembly are respectively fixed to two anchor baffles 2 arranged longitudinally front and back. The energy absorbing end assembly is arranged on one side and the buffer end assembly is arranged on the other side, which can effectively increase the buffer stroke.

[0048] 1. Energy absorbing end components

[0049] The energy absorbing end assembly mainly plays the role of energy absorbing, and includes an energy absorbing tube 47 , an energy absorbing rod 46 , a spring 44 , an energy absorbing end stop plate 43 , a nut 42 and an energy absorbing end protective cover 41 .

[0050] like Figure 3 , the energy absorbing tube 47 is fixed to the longitudinal outer side of the anchor baffle 2, the energy absorbing end protection cover 41 is fixed to the longitudinal outer side of the energy absorbing tube 47, and the energy absorbing rod 46, the spring 44, the energy absorbing end stop plate 43 and the nut 42 are located in the energy absorbing tube 47 and the energy absorbing end protection cover 41. One end of the anchor cable 49 passes through the anchor baffle 2, and is sequentially inserted into the energy absorbing tube 47, the energy absorbing rod 46, the spring 44 and the energy absorbing end stop plate 43, and the end is installed with the nut 42. The energy absorbing rod 46 is located in the energy absorbing tube 47, and the two ends of the spring 44 are respectively limited to the energy absorbing end stop plate 43 and the energy absorbing rod 46.

[0051] The inner diameter of the energy absorbing tube 47 near the energy absorbing end stop plate 43 is larger than the inner diameter of the energy absorbing tube 47 near the anchoring baffle 2. Therefore, at the position where the inner diameter changes inside the energy absorbing tube 47, the movement of the energy absorbing rod 46 toward the anchoring baffle 2 is restricted. In addition, the energy absorbing end protective cover 41 gradually shrinks longitudinally outward from the energy absorbing tube 47, and the longitudinal outward movement of the energy absorbing end stop plate 43 is restricted. When an earthquake causes the beam surface to shift, the distance between the front and rear T beams 1 becomes smaller, and the anchor cable 9 pushes the energy absorbing rod 46 to move forward inside the energy absorbing tube 47 ( Figure 3 The energy absorbing end stop plate 43 is stuck in the reduced section of the energy absorbing end protective cover 41, the nut 42 moves forward and disengages from the energy absorbing end stop plate 43, and the spring 44 is squeezed and contracts to absorb energy.

[0052] A steel baffle 48 is also provided between the outer side of the anchor baffle 2 and the energy absorbing cylinder 47. After the energy absorbing cylinder is installed, the steel baffle 48, the energy absorbing cylinder and the anchor baffle 2 are welded and fixed to fix the energy absorbing cylinder. In addition, when the energy absorbing cylinder is subjected to an instantaneous impact, the force is dispersedly transmitted to the anchor baffle 2 through the steel baffle 48, thereby preventing the anchor baffle 2 from being deformed and cracked locally.

[0053] The energy absorbing end assembly also includes a non-return device 45, such as Figure 4 , a radial hole is provided on the rod wall of the energy absorbing rod 46, and a non-return device 45 is provided in the radial hole. The non-return device 45 includes a non-return column and a reset spring, and the reset spring is located radially outside the non-return column. The radial outer end of the non-return column has an enlarged head, and the radial inner end of the radial hole has a reduced orifice. When the non-return column moves toward the reduced orifice, the enlarged head will eventually be stuck at the reduced orifice and cannot be separated from the radial hole. When the energy absorbing rod 46 continues to move forward in the energy absorbing cylinder 47, the energy absorbing rod 46 exceeds the non-return device 45 and is located on the left side of the non-return device 45. The outer wall of the energy absorbing rod 46 no longer contacts the non-return column, and the reset spring stretches, pushing the non-return column radially inward, and the non-return column is exposed in the energy absorbing cylinder 47, and is stuck on the right side of the energy absorbing rod 46, and cannot continue to move, thereby preventing rebound.

[0054] 2. Buffer end components

[0055] The buffer end assembly mainly plays a buffering role, and includes a buffer 410 , a conical spring 411 , a buffer end stop plate 412 , a nut 42 and a buffer end protective cover 413 .

[0056] like Figure 3 The buffer end protection cover 413 is fixed to the longitudinal outer side of the anchor baffle 2, and the buffer 410, the tower spring 411 and the buffer end stop plate 412 are located in the buffer end protection cover 413. The other end of the anchor cable 49 passes through the anchor baffle 2, and is inserted into the buffer 410, the tower spring 411 and the buffer end stop plate 412 in sequence, and the nut 42 is installed at the end.

[0057] The buffer end protection cover 413 gradually shrinks outward from the anchor baffle 2, and the movement of the buffer end stop plate 412 on the side opposite to the anchor baffle 2 in the buffer end protection cover 413 is restricted. When the beam surface is displaced due to an earthquake, the distance between the front and rear T beams 1 becomes smaller, the anchor cable 9 moves forward, and under the action of the bolt 42, the buffer end stop plate 412 moves toward the anchor baffle 2, and the tower spring 411 is compressed, which cooperates with the energy absorbing end assembly to play a buffering role.

[0058] The construction method of the above energy-absorbing large buffer type anti-falling beam device specifically includes:

[0059] S1: Clean both sides and the cross section of the T-beam partition 3, install anchor baffles 2 on the T-beam partition 3, and install two in the longitudinal direction.

[0060] S2: Pass one end of the anchor cable 49 through an anchor baffle 2 and install the energy absorbing end assembly. Pass the other end of the anchor cable 49 through another anchor baffle 2 and install the buffer end assembly.

[0061] S3: When the T-beam 1 moves, one end of the anchor cable 49 on which the energy absorbing end assembly is installed moves to the side opposite to the anchor baffle 2, the spring 44 plays an energy absorbing role, and the tower spring 411 plays a buffering role.

[0062] S4: When one end of the anchor cable 49 continues to move to the outside of the non-return device 45, the reset spring stretches, pushing the reset column to the reduced opening of the radial hole and exposing it to the outside, clamping the energy absorbing rod 46, and playing a non-return role.

[0063] Some existing bridges are not designed to install anti-falling beam devices in advance, and there are no reserved anti-falling beam installation facilities. Later, they need to be installed. Generally, a support plate is used for connection. The support plate is fixed to the beam body by expansion screws, and the anti-falling beam is connected to the support plate by fork ears. This type of support plate connection requires drilling holes in the beam body, which will cause certain damage to the beam body, and the construction is not convenient enough and the efficiency is not high. The present invention presets a T-beam partition 3 on the T-beam 1, which can be directly installed by the anchor baffle 2. The anchor baffle 2 and the T-beam partition 3 are naturally buckled and connected, without causing any damage to the beam body, and non-destructive installation is achieved. Specifically, two horizontal baffles are provided on the back of the anchor baffle 2 (the contact surface with the T-beam partition 3). During installation, the T-beam partition 3 is just embedded between the two horizontal baffles. This installation method does not damage the beam body, and can be installed later, that is, for projects that do not have anti-falling beams in the original design, this method can be used to install this device later.

[0064] In other embodiments, the number of anti-falling beam devices 4 of the present invention may not be unique, such as Figure 1 In the example, you can set two upper and lower ones to double the energy absorption and buffering effect. Of course, you can also continue to increase the number of settings according to actual needs.

[0065] In summary, the present invention utilizes the existing conditions of the T-beam and can be non-destructively installed without damaging the beam body. It can absorb the large impact load kinetic energy of the beam body during an earthquake, and can continuously and smoothly absorb the instantaneous impact energy, so that the anti-falling beam device has a more stable energy absorption performance. It has a check device to prevent rebound, and the energy absorption range is controllable, which is safer. It adopts radial extrusion energy absorption, and compared with the wedge-shaped energy absorption method, the device has a smaller appearance, stronger adaptability to the installation space, and lower cost. The overall structure is simple, and it has the advantages of long service life, strong durability, and low maintenance cost.

[0066] The above specific examples are used to illustrate the present invention, which is only used to help understand the present invention and is not intended to limit the present invention. For those skilled in the art, according to the concept of the present invention, some simple deductions, modifications or substitutions can be made.

Claims

1. Energy-absorbing and large buffer type anti-falling beam device, characterized by: The anti-falling beam device (4) is longitudinally arranged between two rows of T-beams (1), and is respectively installed on the inner sides of the bottoms of the T-beams (1) on both sides through two anchoring baffles (2) arranged longitudinally front and rear; The anti-falling beam device (4) comprises an energy absorbing end assembly, an anchor cable (49) and a buffer end assembly, wherein the energy absorbing end assembly is connected to the buffer end assembly via the anchor cable (49), and the energy absorbing end assembly and the buffer end assembly are respectively fixed to two anchor baffles (2) arranged longitudinally front and rear.

2. The energy-absorbing and large-buffer type anti-falling beam device according to claim 1 is characterized in that: A T-beam partition (3) is preset on the inner side of the bottom of the T-beam (1), and the T-beam partitions (3) on both sides of the transverse direction are arranged opposite to each other, and the inner sides of both ends of the transverse direction of the anchor baffle (2) are respectively fixed to the end faces of the longitudinal outer sides of the T-beam partitions (3) on both sides.

3. The energy-absorbing and large-buffer type anti-falling beam device according to claim 2 is characterized in that: The energy absorbing end assembly comprises an energy absorbing cylinder (47), an energy absorbing rod (46), a spring (44), an energy absorbing end stop plate (43), a nut (42) and an energy absorbing end protective cover (41); The energy absorbing cylinder (47) is fixed to the longitudinal outer side of the anchor baffle (2), the energy absorbing end protection cover (41) is fixed to the longitudinal outer side of the energy absorbing cylinder (47), and the energy absorbing rod (46), the spring (44), the energy absorbing end stop plate (43) and the nut (42) are located inside the energy absorbing cylinder (47) and the energy absorbing end protection cover (41); One end of the anchor cable (49) passes through the anchor baffle (2), and is sequentially inserted into the energy absorbing tube (47), the energy absorbing rod (46), the spring (44) and the energy absorbing end stop plate (43), and the nut (42) is installed at the end; The energy absorbing rod (46) is located in the energy absorbing tube (47), and the two ends of the spring (44) are respectively limited to the energy absorbing end stop plate (43) and the energy absorbing rod (46).

4. The energy-absorbing and large-buffer type anti-falling beam device according to claim 3 is characterized in that: The inner diameter of the end of the energy absorbing tube (47) close to the energy absorbing end stop plate (43) is greater than the inner diameter of the end of the energy absorbing tube (47) close to the anchoring baffle plate (2); At the position where the inner diameter of the energy absorbing cylinder (47) changes, the movement of the energy absorbing rod (46) toward the side of the anchoring baffle (2) is restricted.

5. The energy-absorbing and large-buffer type anti-falling beam device according to claim 4 is characterized in that: The energy absorbing end protection cover (41) gradually shrinks longitudinally outward from the energy absorbing tube (47), and the longitudinal outward movement of the energy absorbing end stop plate (43) is restricted.

6. The energy-absorbing and large-buffer type anti-falling beam device according to claim 5 is characterized in that: A steel baffle (48) is also provided between the outer side of the anchor baffle (2) and the energy absorbing cylinder (47).

7. The energy-absorbing and large-buffer type beam-falling prevention device according to claim 6 is characterized in that: A radial hole is provided on the rod wall of the energy absorbing rod (46), and a non-return device (45) is provided in the radial hole; The non-return device (45) comprises a non-return column and a return spring, wherein the return spring is located radially outside the non-return column; The radial outer end of the check column has an enlarged head, and the radial inner end of the radial hole has a reduced orifice.

8. The energy-absorbing and large-buffer type anti-falling beam device according to claim 7 is characterized in that: The buffer end assembly comprises a buffer (410), a conical spring (411), a buffer end stop plate (412), a nut (42) and a buffer end protective cover (413); The buffer end protection cover (413) is fixed to the longitudinal outer side of the anchor baffle (2), and the buffer (410), the conical spring (411) and the buffer end stop plate (412) are located inside the buffer end protection cover (413); The other end of the anchor cable (49) passes through the anchor baffle (2), and is sequentially inserted into the buffer (410), the tower spring (411) and the buffer end stop plate (412), and the nut (42) is installed at the end.

9. The energy-absorbing and large-buffer type beam-falling prevention device according to claim 8 is characterized in that: The buffer end protection cover (413) gradually shrinks outward from the anchor baffle (2), and the movement of the buffer end stop plate (412) in the buffer end protection cover (413) in the opposite direction to the anchor baffle (2) is restricted.

10. The construction method of the energy-absorbing large buffer type anti-falling beam device is characterized by: The construction method comprises: Anchor baffles (2) are installed on the T-beam partition (3), with two installed longitudinally in the front and rear directions; Pass one end of the anchor cable (49) through an anchor baffle (2) and install an energy absorbing end assembly; pass the other end of the anchor cable (49) through another anchor baffle (2) and install a buffer end assembly; When the T-beam (1) moves, one end of the anchor cable (49) on which the energy-absorbing end assembly is installed moves to the side opposite to the anchor baffle (2), the spring (44) plays an energy-absorbing role, and the tower-shaped spring (411) plays a buffering role; When one end of the anchor cable (49) continues to move to the outside of the non-return device (45), the reset spring stretches, pushing the reset column toward the reduced opening of the radial hole and exposing it to the outside, thereby clamping the energy absorbing rod (46) and playing a non-return role.

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