CN116335477A - Buffer type anti-collision warning guardrail for road and bridge construction - Google Patents

Buffer type anti-collision warning guardrail for road and bridge construction Download PDF

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Publication number
CN116335477A
CN116335477A CN202310619522.9A CN202310619522A CN116335477A CN 116335477 A CN116335477 A CN 116335477A CN 202310619522 A CN202310619522 A CN 202310619522A CN 116335477 A CN116335477 A CN 116335477A
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CN
China
Prior art keywords
guardrail
road
bridge construction
collision warning
buffer type
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN202310619522.9A
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Chinese (zh)
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CN116335477B (en
Inventor
韩莲凤
刘伯甫
白春棋
李彩云
陆海萍
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Pengtu Construction Co ltd
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Pengtu Construction Co ltd
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Publication date
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Priority to CN202310619522.9A priority Critical patent/CN116335477B/en
Publication of CN116335477A publication Critical patent/CN116335477A/en
Application granted granted Critical
Publication of CN116335477B publication Critical patent/CN116335477B/en
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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H17/00—Fencing, e.g. fences, enclosures, corrals
    • E04H17/14—Fences constructed of rigid elements, e.g. with additional wire fillings or with posts
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
    • E01F9/00—Arrangement of road signs or traffic signals; Arrangements for enforcing caution
    • E01F9/60—Upright bodies, e.g. marker posts or bollards; Supports for road signs
    • E01F9/604—Upright bodies, e.g. marker posts or bollards; Supports for road signs specially adapted for particular signalling purposes, e.g. for indicating curves, road works or pedestrian crossings
    • E01F9/619—Upright bodies, e.g. marker posts or bollards; Supports for road signs specially adapted for particular signalling purposes, e.g. for indicating curves, road works or pedestrian crossings with reflectors; with means for keeping reflectors clean
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
    • E01F9/00—Arrangement of road signs or traffic signals; Arrangements for enforcing caution
    • E01F9/60—Upright bodies, e.g. marker posts or bollards; Supports for road signs
    • E01F9/658—Upright bodies, e.g. marker posts or bollards; Supports for road signs characterised by means for fixing
    • E01F9/669—Upright bodies, e.g. marker posts or bollards; Supports for road signs characterised by means for fixing for fastening to safety barriers or the like
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H17/00—Fencing, e.g. fences, enclosures, corrals
    • E04H17/14—Fences constructed of rigid elements, e.g. with additional wire fillings or with posts
    • E04H17/20—Posts therefor
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H17/00—Fencing, e.g. fences, enclosures, corrals
    • E04H17/14—Fences constructed of rigid elements, e.g. with additional wire fillings or with posts
    • E04H17/20—Posts therefor
    • E04H17/22—Anchoring means therefor, e.g. specially-shaped parts entering the ground; Struts or the like
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
    • F16F15/04—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00—Adapting or protecting infrastructure or their operation
    • Y02A30/30—Adapting or protecting infrastructure or their operation in transportation, e.g. on roads, waterways or railways

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Refuge Islands, Traffic Blockers, Or Guard Fence (AREA)

Abstract

The invention relates to the technical field of road and bridge construction, and discloses a buffer type anti-collision warning guardrail for road and bridge construction, which comprises the following components: the anti-collision device comprises a base, the quantity of base is a plurality of, the top of base is fixed and is provided with the stand, the outer wall middle part and the downside of stand are all fixed and are provided with the cylinder frame, the outer wall rotation of cylinder frame is provided with first rotary drum, two be provided with buffering anticollision institution between the stand, the top of stand is provided with anti-overturn mechanism. This buffer type anticollision warning guardrail for road and bridge construction is based on, through being provided with buffering anticollision institution, when the vehicle strikes lag and second rotary drum, can force the vehicle to one side turn to, the lag takes place deformation simultaneously and to the rear side is tensile to order about the guardrail to the rear side deflection, and under the restriction of spacing groove and stopper, remove and tensile high-strength spring in the lag, carry out elasticity buffering to the impact vehicle, impact force when reducing the vehicle striking.

Description

Buffer type anti-collision warning guardrail for road and bridge construction
Technical Field
The invention relates to the technical field of road and bridge construction, in particular to a buffer type anti-collision warning guardrail for road and bridge construction.
Background
The construction guardrail is commonly used for common road, expressways, various levels of road intersections, toll stations, bridges, parking lots, stations, wharfs, dangerous areas, road construction sections, temporary isolation fences of gathering places and the like as road lane dividing, regional enclosing and shielding safety isolation, diversion, guiding or in some special celebration activities.
Traditional anticollision barrier adopts steel material more, and buffer performance is relatively poor, receives great impact force after the vehicle striking easily, leads to vehicle and passenger's safety unable fine guarantee that obtains, and traditional anticollision barrier often can only play the effect of guiding the lane of returning with the vehicle, and the protection effect to the vehicle is relatively poor, can't effectively avoid the emergence of dangerous circumstances such as vehicle upset, and traditional anticollision barrier is mostly monolithic design, in case take place to damage and need change whole guardrail, maintenance difficulty and cost are higher.
Disclosure of Invention
The invention aims to provide a buffer type anti-collision warning guardrail for road and bridge construction so as to solve the problems in the background technology.
In order to achieve the above purpose, the present invention provides the following technical solutions: buffer type anti-collision warning guardrail based on road and bridge construction includes: the base, the quantity of base is a plurality of, and arranges into one row, the fixed stand that is provided with in top of base, the outer wall middle part and the downside of stand are all fixed and are provided with the cylinder frame, the outer wall rotation of cylinder frame is provided with first rotary drum, two be provided with buffering anticollision institution between the stand, the top of stand is provided with prevents turning over the mechanism.
In order to reduce the impact force of the vehicle after striking the guardrail, the buffering anticollision institution includes: the guardrail, both ends all are provided with the guardrail about the left and right sides of stand through the round pin axle rotation, two the lag has been cup jointed to the outer wall of guardrail, the inner chamber middle part left and right sides of lag is all fixed to be provided with spacing post, the guardrail with fixedly between the spacing post be provided with high strength spring, the spacing groove has all been seted up to the upper and lower both sides of guardrail, the inner chamber grafting of spacing groove has the stopper, the stopper is fixed to be set up the inner chamber inboard of lag, two the inboard of lag is from left to right fixedly in proper order to be provided with a plurality of pivot, the outer wall rotation of pivot is provided with the second rotary drum.
In order to avoid the vehicle from turning over after striking, the anti-turning mechanism comprises: the post of inserting, with the top adaptation grafting of stand is located the upside the through wires hole has been seted up in the guardrail, one side of stopper is fixed to be provided with the stay cord, the stay cord runs through the inner chamber of through wires hole and with peg graft mutually in the outside of stand, the inner chamber left and right sides top of stand all rotates and is provided with the leading wheel, the one end of stay cord is walked around the outer wall of leading wheel and fixed the setting is in the outside bottom of post of inserting, the left and right sides of post of inserting all peg graft there is the installation piece, the inboard of installation piece is fixed and is provided with the protection band, the equal spiro union in top left and right sides of post of inserting has the bolt, just the bolt with the top looks spiro union of installation piece.
Preferably, the outer walls of the first rotary drum and the second rotary drum are provided with reflective warning belts.
Preferably, the second drums are arranged on the inner side of the protective sleeve at equal intervals.
Preferably, the protective sleeve is made of high-strength elastic materials.
Preferably, the middle part of the outer wall of the guide wheel is recessed inwards.
Preferably, the pull rope is inserted into the inner cavity of the high-strength spring, and the pull rope is in a tightening state.
The buffer type anti-collision warning guardrail for road and bridge construction has the beneficial effects that:
through being provided with buffering anticollision institution, when the vehicle strikes lag and second rotary drum, can force the vehicle to one side turn to, the lag takes place deformation simultaneously and stretches to the rear side to order about the guardrail to deflect to the rear side, and under the restriction of spacing groove and stopper, remove and stretch high-strength spring in the lag, carry out elasticity buffering to the striking vehicle, the impact force when reducing the vehicle striking, protection vehicle and passenger's safety.
Through being provided with anti-overturn mechanism, after the vehicle strikes the lag, can force under the pulling of stay cord that the spliced pole risees to drive the guard band and rise upwards, in order to play the guard action to the vehicle, avoid the vehicle upset, have better protection effect.
3. The anti-collision guardrail is convenient to install and detach, convenient to repair after collision, not easy to damage, applicable to road and bridge construction areas, capable of effectively improving road safety, reducing the occurrence rate of traffic accidents, and good in social benefit.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is an enlarged view of the invention at a in fig. 1.
Fig. 3 is a front cross-sectional view of the present invention.
Fig. 4 is an enlarged view of the invention at B in fig. 3.
Fig. 5 is an enlarged view of fig. 3 at C in accordance with the present invention.
FIG. 6 is a schematic view of the mounting structure of the guard band of the present invention.
Fig. 7 is a schematic structural view of the guide wheel of the present invention.
In the figure: 1. a base; 2. a column; 3. a cylindrical frame; 4. a first drum; 5. a buffer anti-collision mechanism; 51. guard bars; 52. a protective sleeve; 53. a limit column; 54. a high-strength spring; 55. a limit groove; 56. a limiting block; 57. a rotating shaft; 58. a second drum; 6. an anti-overturning mechanism; 61. inserting a column; 62. a threading hole; 63. a pull rope; 64. a guide wheel; 65. a mounting block; 66. a protective belt; 67. a bolt; 7. a reflective warning belt.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1-7, the present invention provides a technical solution: buffer type anti-collision warning guardrail based on road and bridge construction includes: the anti-collision device comprises a base 1, upright posts 2, a cylindrical frame 3, a first rotary drum 4, a buffering anti-collision mechanism 5 and an anti-overturning mechanism 6;
the quantity of base 1 is a plurality of, and arranges into one row, and the top of base 1 is fixed to be provided with stand 2, and the outer wall middle part and the downside of stand 2 are all fixed to be provided with cylinder frame 3, and the outer wall rotation of cylinder frame 3 is provided with first section of thick bamboo 4, is provided with buffering buffer stop mechanism 5 between two stands 2, and the top of stand 2 is provided with prevents turning over mechanism 6.
The buffer bump prevention mechanism 5 includes: the guardrail 51, the protective sleeve 52, the limit post 53, the high-strength spring 54, the limit groove 55, the limit block 56, the rotating shaft 57 and the second rotary drum 58;
in order to limit the guardrails 51 on the two sides, the guardrails 51 are rotatably arranged at the upper end and the lower end of the left side and the right side of the upright post 2 through pin shafts, and the outer walls of the two guardrails 51 are sleeved with a protective sleeve 52;
in order to improve the buffering effect of the protective sleeve 52, limiting columns 53 are fixedly arranged on the left side and the right side of the middle of the inner cavity of the protective sleeve 52, and a high-strength spring 54 is fixedly arranged between the guard rail 51 and the limiting columns 53;
in order to prevent the guardrail 51 from separating from the protective sleeve 52, limit grooves 55 are formed in the upper side and the lower side of the guardrail 51, limit blocks 56 are inserted into the inner cavities of the limit grooves 55, and the limit blocks 56 are fixedly arranged on the inner sides of the inner cavities of the protective sleeve 52;
in order to steer the impacting vehicle, a plurality of rotating shafts 57 are fixedly arranged on the inner sides of the two protective sleeves 52 in sequence from left to right, and a second rotating drum 58 is rotatably arranged on the outer wall of each rotating shaft 57.
The anti-rollover mechanism 6 includes: the device comprises a plug 61, a threading hole 62, a pull rope 63, a guide wheel 64, a mounting block 65, a protective belt 66 and a bolt 67;
in order to drive the inserting column 61 to lift, the inserting column 61 is in fit connection with the top end of the upright post 2, a threading hole 62 is formed in the upper side guard rail 51, a pull rope 63 is fixedly arranged on one side of the limiting block 56, and the pull rope 63 penetrates through the inner cavity of the threading hole 62 and is connected with the outer side of the upright post 2 in an inserting mode;
in order to change the direction of the pull rope 63, guide wheels 64 are rotatably arranged at the top ends of the left side and the right side of the inner cavity of the upright post 2, one end of the pull rope 63 bypasses the outer wall of the guide wheels 64 and is fixedly arranged at the outer bottom end of the inserting post 61, the left side and the right side of the inserting post 61 are respectively inserted with a mounting block 65, the inner side of the mounting block 65 is fixedly provided with a protective belt 66, the left side and the right side of the top end of the inserting post 61 are respectively connected with bolts 67 in a threaded mode, and the bolts 67 are connected with the top ends of the mounting blocks 65 in a threaded mode.
Preferably, the outer walls of the first drum 4 and the second drum 58 are provided with reflective warning strips 7 to warn vehicle personnel.
Preferably, a plurality of second drums 58 are disposed at equal intervals on the inner side of the protective jacket 52 to enhance the anti-collision effect on the vehicle.
Preferably, the protective sleeve 52 is made of high-strength elastic material, and can deform after being impacted, so that the protective sleeve is convenient to repair.
In order to avoid the pull rope 63 from being separated from the guide wheel 64, the middle part of the outer wall of the guide wheel 64 is recessed inward.
Preferably, the pull rope 63 is inserted into the inner cavity of the high-strength spring 54, and the pull rope 63 is in a tightened state, and when the protective sleeve 52 is deformed to the rear side, the limit post 53 can pull one end of the pull rope 63, so that the pull rope 63 pulls up the insert post 61 under the support of the guide wheel 64.
The working principle is as follows:
step (1): the base 1 is placed at the road and bridge construction site, the guardrail 51 is rotationally connected to the outer side of the upright post 2 through the pin shaft, so that the protective sleeve 52 and the second rotary drum 58 are installed between the two adjacent bases 1, two ends of the pull rope 63 are respectively fixed on one side of the inserting post 61 and one side of the limiting block 56, the bolt 67 is rotated to release the position fixation of the mounting block 65, and the mounting block 65 can be pulled out of the outer side of the inserting post 61, so that the protective belt 66 is conveniently mounted, fixed and detached, and the whole anti-collision guardrail is conveniently mounted.
Step (2): when a vehicle collides with the crash barrier, the vehicle directly collides with the second rotary drum 58 and the protective sleeve 52, the vehicle can be forced to turn to one side under the rotation of the second rotary drum 58, the impact force acting on the protective sleeve 52 can push the protective sleeve 52 to deform and stretch to the rear side so as to drive the barrier 51 to deflect to the rear side, so that the barrier 51 moves in the protective sleeve 52 under the limitation of the limiting groove 55 and the limiting block 56 and stretches the high-strength spring 54, and the vehicle which collides with the protective sleeve 52 is elastically buffered under the elastic force of the high-strength spring 54.
Step (3): when the protective sleeve 52 deforms to the rear side, one end of the pull rope 63 can be pulled by the limiting column 53, so that the pull rope 63 pulls the inserting column 61 upwards under the support of the guide wheel 64, the inserting column 61 drives the protective belt 66 at the corresponding position to lift upwards, the protective effect on vehicles is achieved, when the vehicles strike the protective sleeve 52 and overturn, the lifted protective belt 66 can block the vehicles, the vehicles are prevented from overturning, the protective effect is good, damage is not easy to occur, the repair is convenient, and the wide popularization is facilitated.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (7)

1. Buffer type anti-collision warning guardrail for road and bridge construction, which is characterized by comprising: the anti-collision device comprises a plurality of bases (1), wherein the bases (1) are arranged in a row, upright posts (2) are fixedly arranged at the top ends of the bases (1), cylindrical frames (3) are fixedly arranged in the middle and the lower sides of the outer walls of the upright posts (2), a first rotary drum (4) is rotatably arranged on the outer walls of the cylindrical frames (3), a buffering anti-collision mechanism (5) is arranged between the two upright posts (2), and anti-overturning mechanisms (6) are arranged at the top ends of the upright posts (2);
the buffering anti-collision mechanism (5) comprises: guardrail (51), both ends all are provided with guardrail (51) about the left and right sides of stand (2) through the round pin axle rotation, two the outer wall of guardrail (51) has cup jointed lag (52), the inner chamber middle part left and right sides of lag (52) is all fixed and is provided with spacing post (53), guardrail (51) with fixedly between spacing post (53) be provided with high-strength spring (54), spacing groove (55) have all been seted up to the upper and lower both sides of guardrail (51), peg graft in the inner chamber of spacing groove (55) has stopper (56), stopper (56) are fixed to be set up the inner chamber inboard of lag (52), two the inboard of lag (52) is from left to right fixedly in proper order and is provided with a plurality of pivot (57), the outer wall rotation of pivot (57) is provided with second rotary drum (58).
2. The buffer type anti-collision warning guardrail for road and bridge construction according to claim 1, wherein the anti-collision warning guardrail is characterized in that: the anti-overturn mechanism (6) comprises: the utility model provides a post (61) is inserted in top adaptation of post (61) and stand (2), is located the upside threading hole (62) have been seted up in guardrail (51), one side of stopper (56) is fixed to be provided with stay cord (63), stay cord (63) run through the inner chamber of threading hole (62) and with the outside of stand (2) is pegged graft mutually, the inner chamber left and right sides top of stand (2) all rotates and is provided with leading wheel (64), the one end of stay cord (63) is walked around the outer wall of leading wheel (64) and fixed the setting is in the outside bottom of post (61), the left and right sides of post (61) is all pegged graft and is installed piece (65), the inboard fixed protection area (66) that is provided with of installation piece (65), the top left and right sides of post (61) all spiro union has bolt (67), just bolt (67) with the top looks spiro union of installation piece (65).
3. The buffer type anti-collision warning guardrail for road and bridge construction according to claim 2, wherein the anti-collision warning guardrail is characterized in that: the outer walls of the first rotary drum (4) and the second rotary drum (58) are provided with reflective warning belts (7).
4. The buffer type anti-collision warning guardrail for road and bridge construction according to claim 3, wherein: the second drums (58) are distributed at equal intervals on the inner side of the protective sleeve (52).
5. The buffer type anti-collision warning guardrail for road and bridge construction according to claim 4, wherein the anti-collision warning guardrail is characterized in that: the protective sleeve (52) is made of high-strength elastic materials.
6. The buffer type anti-collision warning guardrail for road and bridge construction according to claim 5, wherein the anti-collision warning guardrail is characterized in that: the middle part of the outer wall of the guide wheel (64) is recessed inwards.
7. The buffer type anti-collision warning guardrail for road and bridge construction according to claim 6, wherein: the stay cord (63) is inserted into the inner cavity of the high-strength spring (54), and the stay cord (63) is in a tightening state.
CN202310619522.9A 2023-05-30 2023-05-30 Buffer type anti-collision warning guardrail for road and bridge construction Active CN116335477B (en)

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CN202310619522.9A CN116335477B (en) 2023-05-30 2023-05-30 Buffer type anti-collision warning guardrail for road and bridge construction

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Application Number Priority Date Filing Date Title
CN202310619522.9A CN116335477B (en) 2023-05-30 2023-05-30 Buffer type anti-collision warning guardrail for road and bridge construction

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CN116335477A true CN116335477A (en) 2023-06-27
CN116335477B CN116335477B (en) 2023-08-01

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN213476729U (en) * 2020-09-29 2021-06-18 邵华 Anticollision barrier is used in town road installation protection
CN214219376U (en) * 2020-12-09 2021-09-17 吕富贞 Safety barrier structure for highway bridge
CN114635357A (en) * 2022-05-06 2022-06-17 邵轩 Guardrail with good protective capacity for bridge
CN216838969U (en) * 2021-11-18 2022-06-28 广西辰华建筑工程有限公司 Road and bridge anticollision barrier
CN218712174U (en) * 2022-10-09 2023-03-24 中泰旭伟金属制造有限公司 Intelligent buffer device for bridge anti-collision guardrail

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN213476729U (en) * 2020-09-29 2021-06-18 邵华 Anticollision barrier is used in town road installation protection
CN214219376U (en) * 2020-12-09 2021-09-17 吕富贞 Safety barrier structure for highway bridge
CN216838969U (en) * 2021-11-18 2022-06-28 广西辰华建筑工程有限公司 Road and bridge anticollision barrier
CN114635357A (en) * 2022-05-06 2022-06-17 邵轩 Guardrail with good protective capacity for bridge
CN218712174U (en) * 2022-10-09 2023-03-24 中泰旭伟金属制造有限公司 Intelligent buffer device for bridge anti-collision guardrail

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