CN113356146A - Pier protection device - Google Patents

Pier protection device Download PDF

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Publication number
CN113356146A
CN113356146A CN202110733527.5A CN202110733527A CN113356146A CN 113356146 A CN113356146 A CN 113356146A CN 202110733527 A CN202110733527 A CN 202110733527A CN 113356146 A CN113356146 A CN 113356146A
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CN
China
Prior art keywords
bevel gear
pier
circular plate
gear
rectangular frame
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Pending
Application number
CN202110733527.5A
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Chinese (zh)
Inventor
孙二豹
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Individual
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Individual
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Priority to CN202110733527.5A priority Critical patent/CN113356146A/en
Publication of CN113356146A publication Critical patent/CN113356146A/en
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    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02BHYDRAULIC ENGINEERING
    • E02B3/00Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
    • E02B3/20Equipment for shipping on coasts, in harbours or on other fixed marine structures, e.g. bollards
    • E02B3/26Fenders
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01DCONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D19/00Structural or constructional details of bridges
    • E01D19/02Piers; Abutments ; Protecting same against drifting ice
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00Adapting or protecting infrastructure or their operation
    • Y02A30/30Adapting or protecting infrastructure or their operation in transportation, e.g. on roads, waterways or railways

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Ocean & Marine Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Environmental & Geological Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Architecture (AREA)
  • Bridges Or Land Bridges (AREA)

Abstract

The invention relates to a pier protection device, which effectively solves the problems that the buffer device has poor adaptability, the upper limit of the buffer force is small, and the impact force transversely acts on the pier; the technical scheme includes that the device comprises an upper buffering unit and a lower buffering unit, the upper buffering unit absorbs energy through an elastic part, the lower buffering unit comprises an outer sleeve and an inner sleeve, an upper bevel gear, a lower bevel gear, an upper circular plate and a lower circular plate are mounted on the outer wall of the inner sleeve, the two circular plates are in threaded connection with the inner sleeve, a first middle bevel gear and a first straight gear are mounted on the right side of the inner sleeve, a second middle bevel gear and a second straight gear are mounted on the left side of the inner sleeve, a one-way transmission mechanism is arranged between the straight gears and the middle bevel gear, each straight gear is meshed with a rack, and the upper bevel gear and the lower bevel gear can be driven to rotate in a one-way mode no matter which section pushes the rack, so that the two circular plates are pulled to axially extrude water to form buffering resistance; the invention has strong adaptability, large upper limit of buffer force and no transverse reaction force on the bridge pier.

Description

Pier protection device
Technical Field
The invention relates to the field of bridge protection, in particular to a pier protection device.
Background
The bridge pier is a supporting point of a bridge main body, and when a ship passes under the bridge, the ship can collide. The pier is scratched, so that collision avoidance facilities are arranged on the pier to protect the pier and the ship; at present, the anti-collision facilities generally mount elastic energy-absorbing parts at the periphery of a pier to absorb energy and buffer impact, and the anti-collision equipment has the following defects:
firstly, the elastic modulus of the elastic part is fixed, the deformation is small when the impact force is small, the buffering effect is not obvious, and when the impact force is too large, the buffering force of the elastic part is fatigue and soft, so that the impact adaptability of the buffering equipment is poor;
secondly, the upper limit of the buffering force of the elastic part is effective, and the elastic part cannot provide enough buffering braking force for the impact of a large ship;
thirdly, the action point of the elastic element is positioned on the pier, and the radial action of the elastic reaction force and the surface of the pier are subjected to energy absorption to a certain degree, but the elastic element still has a large amount of impact force to the huge impact force of the large ship and acts on the pier transversely, so that the vibration, the displacement and even the fracture accidents of the pier are caused.
Disclosure of Invention
Based on the problems that the buffer equipment has poor stress adaptability and small upper limit of buffer force, and large residual impact force transversely acts on the pier, the invention provides the pier protection device.
The technical scheme includes that the device comprises an upper buffering unit and a lower buffering unit, the upper buffering unit comprises a rectangular frame sleeved on the periphery of a pier, the length direction of the rectangular frame is the same as the ship course, an annular sleeve is fixed on the pier, the annular sleeve and two long sides of the rectangular frame are fixedly connected through a connecting rod, a fracture groove is formed in the connecting rod and is fractured when the rectangular frame is overloaded, arc-shaped plates are arranged on the outer sides of the four sides of the rectangular frame, a guide rod is arranged between each arc-shaped plate and the corresponding side edge of the rectangular frame, one end of each guide rod vertically penetrates through the side edge of the rectangular frame, the other end of each guide rod is hinged with the corresponding arc-shaped plate, the guide rods can rotate in the horizontal plane relative to the arc-shaped plates, and springs are sleeved on the guide rods; the lower buffer unit is arranged below the water surface and comprises an outer sleeve coaxial with the pier and an inner sleeve fixed on the pier, an upper bevel gear, a lower bevel gear, an upper circular plate positioned above the upper bevel gear and a lower circular plate positioned below the lower bevel gear are arranged on the outer wall of the inner sleeve, the upper circular plate and the lower circular plate are in threaded connection with the inner sleeve, a radial rotating shaft is respectively arranged on the left side and the right side of the inner sleeve, a first middle bevel gear and a first straight gear are arranged on the right rotating shaft, a second middle bevel gear and a second straight gear are arranged on the left rotating shaft, the first middle bevel gear and the second middle bevel gear are simultaneously meshed with the upper bevel gear and the lower bevel gear, ratchet wheel structures are respectively arranged between the first straight gear and the rotating shaft, and a first rack is meshed with the first straight gear, the second straight gear is meshed with a second rack, the first rack and the second rack are arranged on the side wall of the outer sleeve in a sliding mode, and two ends of the two racks are fixedly connected with the same end of the rectangular frame through a vertical plate.
Each guide rod is provided with a plurality of springs, the elastic modulus of the springs is different, and the larger the elastic modulus, the shorter the spring length.
Go up bevel gear's upper surface fixed with the last slide bar up of a plurality of circumference equipartitions, the plectane all passes in a plurality of upper ends of going up the slide bar, lower bevel gear's lower fixed surface have a plurality of circumference equipartitions lower slide bar down, the plectane all passes down to the lower extreme of lower slide bar, goes up bevel gear and drives through last slide bar and go up plectane synchronous rotation, lower bevel gear drives through slide bar down and plectane synchronous rotation down.
And a plurality of vertical force-unloading rollers are arranged on the outer side of each arc-shaped plate.
The inner wall of the outer sleeve is a multi-section conical inner wall, and in the initial position, the upper circular plate and the lower circular plate are both positioned at the maximum inner diameter of the outer sleeve.
The arc-shaped plate and the force-unloading roller are made of rubber materials.
Ratchets are evenly distributed on the inner walls of the first straight gear and the second straight gear in the circumferential direction, a plurality of pawls are evenly distributed on the rotating shaft in the circumferential direction, and the pawls are matched with the ratchets.
The invention has strong adaptability to the impact force, large upper limit of the buffer force and no transverse reaction force on the bridge pier.
Drawings
Fig. 1 is a front sectional view of the present invention.
Fig. 2 is a top view of the present invention.
Fig. 3 is a cross-sectional view taken along line a-a of fig. 1 at location a.
Fig. 4 is a front view of the present invention.
Fig. 5 is a left side view of the present invention.
Fig. 6 is an enlarged view of the position B in fig. 1.
Fig. 7 is an enlarged view of the position C in fig. 2.
Fig. 8 is an end view of the ratchet-pawl configuration.
Detailed Description
The following detailed description of the invention refers to the accompanying drawings 1-8.
The ship-mounted device comprises an upper buffering unit and a lower buffering unit, wherein the upper buffering unit comprises a rectangular frame 1 sleeved on the periphery of a pier, the length direction of the rectangular frame 1 is the same as the ship course, an annular sleeve 2 is fixed on the pier, the annular sleeve 2 is fixedly connected with two long sides of the rectangular frame 1 through a connecting rod 3, a fracture groove 4 is formed in the connecting rod 3, the fracture groove 4 is fractured during overload, arc-shaped plates 5 are arranged on the outer sides of four sides of the rectangular frame 1, a guide rod 6 is arranged between each arc-shaped plate 5 and the corresponding side edge of the rectangular frame 1, one end of each guide rod 6 vertically penetrates through the side edge of the rectangular frame 1, the other end of each guide rod 6 is hinged with the corresponding arc-shaped plate 5, the guide rods 6 can rotate in the horizontal plane relative to the arc-shaped plates 5, and springs 7 are sleeved on the guide rods 6; the lower buffer unit is arranged below the water surface and comprises an outer sleeve 8 coaxial with the pier and an inner sleeve 9 fixed on the pier, an upper bevel gear 10, a lower bevel gear 11, an upper circular plate 12 positioned above the upper bevel gear 10 and a lower circular plate 13 positioned below the lower bevel gear 11 are arranged on the outer wall of the inner sleeve 9, the upper circular plate 12 and the lower circular plate 13 are both in threaded connection with the inner sleeve 9, a radial rotating shaft 14 is respectively arranged on the left side and the right side of the inner sleeve 9, a first middle bevel gear 15 and a first straight gear 16 are arranged on the right rotating shaft 14, a second middle bevel gear 17 and a second straight gear 18 are arranged on the left rotating shaft 14, the first middle bevel gear 15 and the second middle bevel gear 17 are both meshed with the upper bevel gear 10 and the lower bevel gear 11, and ratchet and pawl structures are respectively arranged between the first straight gear 16 and the second straight gear 18 and the rotating shaft 14 where the ratchet pawl structures are arranged, the first straight gear 16 is meshed with a first rack 19, the second straight gear 18 is meshed with a second rack 20, the first rack 19 and the second rack 20 are arranged on the side wall of the outer sleeve 8 in a sliding mode, and two ends of the two racks are fixedly connected with the same end of the rectangular frame 1 through a vertical plate 21.
A plurality of springs 7 are mounted on each guide rod 6, the elastic modulus of the springs 7 is different, and the length of the spring 7 with the larger elastic modulus is shorter; the closer the arc plate 5 is to the rectangular frame 1, the greater the number of springs 7 compressed, and the greater the reaction force.
The upper surface of the upper bevel gear 10 is fixed with a plurality of upward upper sliding rods 22 with uniformly distributed circumferences, the upper ends of the upper sliding rods 22 penetrate through the upper circular plate 12, the lower surface of the lower bevel gear 11 is fixed with a plurality of downward lower sliding rods 23 with uniformly distributed circumferences, the lower end of each lower sliding rod 23 penetrates through the lower circular plate 13, the upper bevel gear 10 drives the upper circular plate 12 to synchronously rotate through the upper sliding rods 22, and the lower bevel gear 11 drives the lower circular plate 13 to synchronously rotate through the lower sliding rods 23.
A plurality of vertical force-discharging rollers 24 are installed on the outer side of each arc-shaped plate 5, and when a ship collides against the arc-shaped plates 5, the force-discharging rollers 24 rotate to have the force-discharging and guiding effects, so that the forward collision of the ship to a pier is avoided as much as possible.
The inner wall of the outer sleeve 8 is a multi-section conical inner wall, when in an initial position, the upper circular plate 12 and the lower circular plate 13 are both positioned at the maximum inner diameter position of the outer sleeve 8, and no matter the upper circular plate 12 and the lower circular plate 13 move upwards or downwards from the initial position, the gap between the circular plates and the inner wall of the outer sleeve 8 is gradually reduced.
The arc-shaped plate 5 and the force-unloading roller 24 are made of rubber materials, so that the energy-absorbing roller can deform and absorb energy, has stable property and good strength and toughness, and is not easy to corrode or break.
Ratchets 25 are uniformly distributed on the inner walls of the first straight gear 16 and the second straight gear 18 in the circumferential direction, a plurality of pawls 26 are uniformly distributed on the rotating shaft 14 in the circumferential direction, and the pawls 26 are matched with the ratchets 25 to realize one-way transmission between the straight gears and the corresponding rotating shafts 14.
The working principle of the invention is as follows: when a ship passes under a bridge along the course and accidentally collides against a pier, a ship body firstly collides against the force unloading rollers 24 on the arc plates 5 at the front end and the rear end of the rectangle, the force unloading rollers 24 rotate to guide the bow of the ship to one side, the forward collision of the ship to the pier is avoided as much as possible, meanwhile, the collided arc plates 5 move towards the rectangular frame 1, the springs 7 inside the arc plates 5 are compressed to buffer the collision force, the larger the moving distance of the arc plates 5 is, the more the compressed springs 7 are, and therefore the buffer force is increased in a jumping manner for a plurality of times according to the collision force, so that softer buffer transition is provided at the initial stage of collision, and larger buffer reaction force is provided at the final stage of collision to effectively brake the ship; meanwhile, one end of the guide rod 6 is hinged with the arc-shaped plate 5, so that when the arc-shaped plate 5 is impacted, the guide rod 6 can move towards the rectangular frame 1 and can deflect to a certain degree according to the impact angle, and the guide rod 6 is prevented from being clamped due to oblique impact; if the impact force is small, the ship can be braked or guided to run over by the upper buffer unit; if a ship scratches and rubs piers from the left side or the right side of the pier, the arc plates 5 on the left side and the right side move towards the rectangular frame 1 to buffer the scratches and rubs, and the impact force during scratching is generally small, so that the buffering capacity of the upper buffering unit is enough to buffer.
If a ship collides against a pier from the front end and the rear end, and the tonnage of the ship is large or the speed of the ship is high, the impact force is large, after the upper buffer unit reaches the buffer limit, the impact force exceeds the bearing limit of the connecting rod 3, so that the connecting rod 3 is broken from the breaking groove 4, the rectangular frame 1 is separated from the annular sleeve 2, the ship continues to move towards the pier, the rectangular frame 1 is pushed to move back and forth, the rectangular frame 1 pushes the first rack 19 and the second rack 20 to move through the connecting plate, the first rack 19 and the second rack 20 respectively drive the first straight gear 16 and the second straight gear 18 to rotate, but only one of the straight gears drives the corresponding rotating shaft 14 to rotate through the ratchet pawl at the same time, for example, if the ship collides from the front end, the first rack 19 and the second rack 20 move back, only the first straight gear 16 drives the rotating shaft 14 on the right side and the first intermediate bevel gear 15 to rotate, the first intermediate bevel gear 15 drives the upper bevel gear 10 and the lower bevel gear 11 to rotate, at the moment, the first intermediate bevel gear 15 is in driving, the second intermediate bevel gear 17 is in driven, and the second straight gear 18 and the rotating shaft 14 where the second straight gear 18 is located have opposite rotation directions; if a ship is impacted from the rear end, the first rack 19 and the second rack 20 move forwards, only the second straight gear 18 drives the rotating shaft 14 on the left side and the second middle bevel gear 17 to rotate at the moment, the second middle bevel gear 17 drives the upper bevel gear 10 and the lower bevel gear 11 to rotate, the second middle bevel gear 17 is driven at the moment, the first middle bevel gear 15 is driven, and the first straight gear 16 and the rotating shaft 14 on which the first straight gear 16 is arranged are in opposite directions; therefore, only one of the intermediate bevel gears drives the upper bevel gear 10 and the lower bevel gear 11 to rotate in one direction no matter which end is impacted; the upper bevel gear 10 and the lower bevel gear 11 drive the upper circular plate 12 and the lower circular plate 13 to synchronously rotate through a plurality of sliding rods, when the upper circular plate 12 and the lower circular plate 13 rotate, the upper circular plate 12 and the lower circular plate 13 axially move in opposite directions under the action of threads, water between the two circular plates is compressed and discharged from a gap between the circular plates and the inner wall of the outer sleeve 8, and because the gap is small, resistance is received when the water is discharged, the resistance provides buffering braking force for a ship, and the gap between the circular plates and the inner wall of the outer sleeve 8 is smaller and smaller along with the axial movement of the circular plates, the larger the buffering resistance is provided, and finally the ship is completely braked.
After the lower buffer unit is operated, the rectangular frame 1 needs to be reset and replaced with a new connecting rod 3.
The invention has the following technical effects:
for impact with small force, the upper buffer unit can provide multi-section buffer force, soft buffer transition is provided at the initial stage of the impact, harder and larger buffer reaction force is provided at the tail stage of the impact to effectively brake the ship, the buffer braking process of the ship is more reasonable, and the ship can effectively buffer large and small impacts.
For the impact with high force, the lower buffer unit acts, buffer braking is carried out through the reaction force of the water pressure, the reaction force of the water pressure is gradually increased through the gradual reduction of the gap, the buffer process is smoother, a very large upper limit of the buffer force can be provided, and the large impact is effectively braked.
When the lower buffer unit acts, the impact force of the ship is finally buffered and braked by the axial resistance between the two circular plates instead of the radial reaction force provided by the pier, so that the transverse pushing and the impact on the pier can be avoided, and the pier can not be damaged by shaking, shifting, breaking and the like when being subjected to large impact force.

Claims (7)

1. A pier protection device is characterized by comprising an upper buffer unit and a lower buffer unit, wherein the upper buffer unit comprises a rectangular frame (1) sleeved on the periphery of a pier, the length direction of the rectangular frame (1) is the same as the course of a ship, an annular sleeve (2) is fixed on the pier, the annular sleeve (2) is fixedly connected with two long sides of the rectangular frame (1) through a connecting rod (3), a fracture groove (4) is formed in the connecting rod (3), the fracture groove (4) is fractured during overload, an arc-shaped plate (5) is arranged on the outer sides of four sides of the rectangular frame (1), a guide rod (6) is arranged between the arc-shaped plate (5) and the corresponding side edge of the rectangular frame (1), one end of the guide rod (6) vertically penetrates through the side edge of the rectangular frame (1), the other end of the guide rod is hinged with the arc-shaped plate (5), and the guide rod (6) can rotate relative to the arc-shaped plate (5), a spring (7) is sleeved on the guide rod (6); the lower buffer unit is arranged below the water surface and comprises an outer sleeve (8) coaxial with the pier and an inner sleeve (9) fixed on the pier, an upper bevel gear (10), a lower bevel gear (11), an upper circular plate (12) positioned above the upper bevel gear (10) and a lower circular plate (13) positioned below the lower bevel gear (11) are arranged on the outer wall of the inner sleeve (9), the upper circular plate (12) and the lower circular plate (13) are both in threaded connection with the inner sleeve (9), the left side and the right side of the inner sleeve (9) are respectively provided with a radial rotating shaft (14), a first middle bevel gear (15) and a first straight gear (16) are arranged on the right rotating shaft (14), a second middle bevel gear (17) and a second straight gear (18) are arranged on the rotating shaft (14) on the left side, the first middle bevel gear (15) and the second middle bevel gear (17) are both meshed with the upper bevel gear (10) and the lower bevel gear (11) at the same time, ratchet pawl structures are installed between the first straight gear (16) and the rotating shaft (14) where the second straight gear (18) and the rotating shaft are located, a first rack (19) is meshed with the first straight gear (16), a second rack (20) is meshed with the second straight gear (18), the first rack (19) and the second rack (20) are arranged on the side wall of the outer sleeve (8) in a sliding mode, and the two ends of the two racks are fixedly connected with the same end of the rectangular frame (1) through a vertical plate (21).
2. The pier protecting device according to claim 1, wherein a plurality of springs (7) are installed on each guide rod (6), the plurality of springs (7) have different elastic moduli, and the length of the spring (7) is shorter as the elastic modulus is larger.
3. The pier protection device according to claim 1, wherein a plurality of upward upper sliding rods (22) with uniformly distributed circumferences are fixed on the upper surface of the upper bevel gear (10), the upper ends of the upper sliding rods (22) penetrate through the upper circular plate (12), a plurality of downward lower sliding rods (23) with uniformly distributed circumferences are fixed on the lower surface of the lower bevel gear (11), the lower ends of the lower sliding rods (23) penetrate through the lower circular plate (13), the upper bevel gear (10) drives the upper circular plate (12) to synchronously rotate through the upper sliding rods (22), and the lower bevel gear (11) drives the lower circular plate (13) to synchronously rotate through the lower sliding rods (23).
4. A pier protecting device according to claim 1, wherein a plurality of vertical force-releasing rollers (24) are installed on the outer side of each arc-shaped plate (5).
5. An abutment protection device according to claim 1, wherein the inner wall of the outer sleeve (8) is a multi-segment tapered inner wall, and in the initial position, the upper circular plate (12) and the lower circular plate (13) are both located at the maximum inner diameter of the outer sleeve (8).
6. The pier protecting device according to claim 1, wherein the arc-shaped plates (5) and the force-releasing rollers (24) are made of rubber.
7. The pier protecting device according to claim 1, wherein ratchet teeth (25) are uniformly distributed on the inner walls of the first straight gear (16) and the second straight gear (18) in a circumferential manner, a plurality of pawls (26) are uniformly distributed on the rotating shaft (14) in a circumferential manner, and the pawls (26) are matched with the ratchet teeth (25).
CN202110733527.5A 2021-06-30 2021-06-30 Pier protection device Pending CN113356146A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110733527.5A CN113356146A (en) 2021-06-30 2021-06-30 Pier protection device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110733527.5A CN113356146A (en) 2021-06-30 2021-06-30 Pier protection device

Publications (1)

Publication Number Publication Date
CN113356146A true CN113356146A (en) 2021-09-07

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Application Number Title Priority Date Filing Date
CN202110733527.5A Pending CN113356146A (en) 2021-06-30 2021-06-30 Pier protection device

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114985717A (en) * 2022-08-01 2022-09-02 河北泰禾高温流体科技股份有限公司 Safe anticollision slide gate mechanism

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201896287U (en) * 2010-12-21 2011-07-13 衡水橡胶股份有限公司 Buffer device for collision-preventing structure of bridge pier
CN206616522U (en) * 2017-03-07 2017-11-07 江苏乾程工程技术有限公司 A kind of anticollision device of pier
CN111719415A (en) * 2020-07-08 2020-09-29 韦国兴 Novel energy storage resilience sliding buffering energy dissipation device of anticollision
CN211848869U (en) * 2020-01-09 2020-11-03 国华工程科技(集团)有限责任公司 Anti floating buffer stop that sways
CN112343010A (en) * 2020-10-30 2021-02-09 重庆交通大学 Anti-collision protection device for bridge pier
CN213358302U (en) * 2020-08-13 2021-06-04 吉林省高等级公路工程有限责任公司 Omnidirectional energy-consumption anti-collision device for bridge pier

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201896287U (en) * 2010-12-21 2011-07-13 衡水橡胶股份有限公司 Buffer device for collision-preventing structure of bridge pier
CN206616522U (en) * 2017-03-07 2017-11-07 江苏乾程工程技术有限公司 A kind of anticollision device of pier
CN211848869U (en) * 2020-01-09 2020-11-03 国华工程科技(集团)有限责任公司 Anti floating buffer stop that sways
CN111719415A (en) * 2020-07-08 2020-09-29 韦国兴 Novel energy storage resilience sliding buffering energy dissipation device of anticollision
CN213358302U (en) * 2020-08-13 2021-06-04 吉林省高等级公路工程有限责任公司 Omnidirectional energy-consumption anti-collision device for bridge pier
CN112343010A (en) * 2020-10-30 2021-02-09 重庆交通大学 Anti-collision protection device for bridge pier

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114985717A (en) * 2022-08-01 2022-09-02 河北泰禾高温流体科技股份有限公司 Safe anticollision slide gate mechanism
CN114985717B (en) * 2022-08-01 2022-09-30 河北泰禾高温流体科技股份有限公司 Safe anticollision slide gate mechanism

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Application publication date: 20210907