CN220724846U - Modularized bridge pier column climbing device - Google Patents

Modularized bridge pier column climbing device Download PDF

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Publication number
CN220724846U
CN220724846U CN202321928772.2U CN202321928772U CN220724846U CN 220724846 U CN220724846 U CN 220724846U CN 202321928772 U CN202321928772 U CN 202321928772U CN 220724846 U CN220724846 U CN 220724846U
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CN
China
Prior art keywords
locking
support
arm
bridge pier
climbing device
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CN202321928772.2U
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Chinese (zh)
Inventor
舒锐
罗红
李友兴
曹舜
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Sichuan Jiaojian Urban Construction And Development Co ltd
Sichuan Communications Construction Group Co Ltd
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Sichuan Jiaojian Urban Construction And Development Co ltd
Sichuan Communications Construction Group Co Ltd
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Priority to CN202321928772.2U priority Critical patent/CN220724846U/en
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Publication of CN220724846U publication Critical patent/CN220724846U/en
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Abstract

The utility model discloses a modularized bridge pier climbing device which comprises a pair of locking hoops and a multi-stage oil cylinder, wherein the locking hoops are arranged on a pier, each locking hoop comprises a support and arms symmetrically arranged on two sides of the support, the arms are rotatably connected with the support, the arms are provided with driving components which are used for controlling the arms to be unfolded or folded in a rotating mode, one end part of each arm is provided with a locking mechanism, the other arm is provided with a locking piece matched with the locking mechanism, and the locking mechanism is used for releasing or locking the locking piece. The multistage oil cylinder is configured on the support of one locking hoop, and the driving end of the multistage oil cylinder is fixedly connected with the support of the other locking hoop. The utility model has the technical effects of crossing the cross beam during climbing, provides convenience for the construction of the bent cap, can realize the realization of different module functions by configuring different functional equipment on the locking hoop, and provides convenience for the construction of the bent cap and the detection work of the bridge.

Description

Modularized bridge pier column climbing device
Technical Field
The utility model belongs to the technical field of bridge engineering equipment, and particularly relates to a modularized bridge pier column climbing device.
Background
The existing capping beam construction mode is original, mainly comprises floor type bracket construction, hoop type bracket construction and embedded part/steel bar type bracket construction, and a capping beam construction platform is usually required to be erected on a bridge pier column so that workers can conveniently carry out construction work. After setting up fixedly, the height of the construction platform can not be flexibly adjusted according to construction requirements, and troubles are brought to construction, so that the construction is more convenient and quicker, the construction platform is set up by adopting an automatic climbing system, for example, the publication number is CN219080088U, and the patent name is: according to the Chinese patent of climbing device and climbing system, two anchor clamps hinged with each other are arranged, a pull rod is arranged at the end part of each anchor clamp to lock and unlock the anchor clamps, and a rigid chain is arranged between the two anchor clamps to adjust the height between the two anchor clamps, so that the climbing of a pier is realized, however, when the climbing device is in actual use, the anchor clamps have small opening and closing clearance due to the fact that the pull rod is limited, so that when a beam is arranged on a pier column, the anchor clamps cannot be opened to cross the beam, and trouble is caused to construction.
Disclosure of Invention
In order to solve the problems, the modularized bridge pier stud climbing device provided by the utility model realizes the technical effect of crossing the cross beam during climbing, provides convenience for capping beam construction, and can realize the realization of different module functions by configuring different functional equipment on the locking hoop, thereby providing convenience for capping beam construction and bridge detection work.
The embodiment of the utility model is realized by the following technical scheme:
a modular bridge pier climbing device comprising:
the locking hoops are arranged on the pier column up and down, each locking hoop comprises a support and arms symmetrically arranged on two sides of the support, each arm is rotatably connected with the support, each arm is provided with a driving assembly used for controlling the arm to be unfolded or folded in a rotating mode, one end portion of each arm is provided with a locking mechanism, the other arm is provided with a locking piece matched with the locking mechanism, and the locking mechanism is used for releasing or locking the locking piece.
The multistage oil cylinder is configured on the support of one locking hoop, and the driving end of the multistage oil cylinder is fixedly connected with the support of the other locking hoop.
The arm is including first arm and the second arm of articulated setting each other, first arm sets up with the support is articulated, drive assembly includes first flexible jar and the flexible jar of second, the one end of first flexible jar articulates and disposes in the support, the other end and the first arm of first flexible jar are linked, the one end of the flexible jar of second articulates and disposes in first flexible jar, the other end of the flexible jar of second articulates and disposes in the flexible jar of second.
The locking mechanism comprises a lock catch and a telescopic part, wherein the lock piece is in a hook shape and can be hooked on the lock catch, and the telescopic part is connected with the lock catch and used for driving the lock catch to linearly move.
The telescopic part comprises a gear box, a gear motor arranged on the outer wall of the gear box, and a screw rod arranged in the gear box in a sliding manner, wherein the end part of the screw rod is fixedly connected with the lock catch, the outer wall of the screw rod is in threaded connection with a first bevel gear, the gear motor is provided with a driving shaft, one end of the driving shaft penetrates into the gear box and is provided with a second bevel gear, and the first bevel gear and the second bevel gear are meshed.
The gearbox is provided with a plurality of support rods in a sliding manner, the support rods are arranged in parallel with the screw rod, and the support rods are fixedly connected with the lock catches.
The gear box is rotatably arranged on the second mechanical arm, and a plurality of third telescopic cylinders are further arranged between the second mechanical arm and the gear box and used for driving the gear box to rotate.
The inner wall of the support is provided with a plurality of channels, a fourth telescopic cylinder is arranged in the channels, the end part of the fourth telescopic cylinder is provided with rollers, and the fourth telescopic cylinder is used for controlling the rollers to extend out of the channels or retract into the channels.
The modularized bridge pier climbing device further comprises a plurality of wedge blocks, wherein the wedge blocks are detachably arranged on the inner side wall of the locking hoop and used for adjusting the inner diameter of the locking hoop.
The technical scheme of the utility model has at least the following advantages and beneficial effects:
(1) According to the modularized bridge pier stud climbing device, the arm holding sections are arranged as the first mechanical arm and the second mechanical arm, and the swing arms are controlled through the first telescopic cylinder and the second telescopic cylinder respectively, so that the shape of the pier stud can be better adapted, the anchor ear can be better attached to the outer wall of the pier for locking, the two telescopic rods can be used for better pressing the arm holding, the holding force of the arm holding to the pier is improved, the locking effect of the anchor ear to the pier is ensured, the safety is improved, in addition, the locking mechanism is unlocked through the locking anchor ear, the arm holding is opened to avoid the cross beam, and the effect of the locking anchor ear crossing the cross beam is realized through the extension of the multistage oil cylinder.
(2) According to the utility model, the working platform or the bridge pier detection device is arranged on the locking hoop to realize the switching of multiple use modes, the function of adjusting the height of the working platform is provided when the working platform is erected, the construction of the bent cap can be facilitated, and the modularized bridge pier column climbing device is utilized to drive the detection equipment to climb and walk on the bridge pier when the bridge pier detection device is erected, so that the comprehensive detection of the bridge pier is realized.
(3) According to the utility model, the wedge-shaped blocks are detachably arranged on the inner wall of the anchor ear, so that the anchor ear can adapt to pier studs with different diameters, and the application range of the climbing device is further improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic structural diagram of embodiment 1 of the present utility model;
fig. 2 is a schematic structural view of a locking hoop in embodiment 1 of the present utility model;
FIG. 3 is a schematic side view of the embodiment 1 of the present utility model;
FIG. 4 is a schematic diagram of a connection mode of a screw rod and a gear motor in a gear box in the utility model;
FIG. 5 is a schematic view of the structure of example 2 of the present utility model;
FIG. 6 is a cross-sectional view of a wedge block of example 2 of the present utility model;
fig. 7 is a schematic structural diagram of embodiment 3 in the present utility model.
Icon: 100-modularized bridge pier climbing device, 1-locking anchor ear, 101-first mechanical arm, 102-second mechanical arm, 103-first telescopic cylinder, 104-second telescopic cylinder, 105-support, 2-multistage oil cylinder, 3-locking mechanism, 31-locking piece, 32-lock catch, 331-gear box, 332-gear motor, 333-lead screw, 334-first bevel gear, 335-driving shaft, 336-second bevel gear, 34-supporting rod, 35-third telescopic cylinder, 4-roller, 5-pier column, 51-crossbeam, 6-working platform and 7-wedge.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present utility model, it should be noted that, if the azimuth or positional relationship indicated by the terms "inner", "outer", etc. appears to be based on the azimuth or positional relationship shown in the drawings, or the azimuth or positional relationship that the inventive product is conventionally put in use, it is merely for convenience of describing the present utility model and simplifying the description, and it is not indicated or implied that the apparatus or element referred to must have a specific azimuth, be configured and operated in a specific azimuth, and therefore should not be construed as limiting the present utility model.
In the description of the present utility model, it should also be noted that, unless explicitly stated and limited otherwise, the terms "disposed," "mounted," "configured," and "connected" should be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
Examples
Referring to fig. 1-4, the embodiment provides a modular bridge pier climbing device, which comprises a pair of locking hoops 1 and a multistage oil cylinder 2.
Referring to fig. 1, the pair of locking hoops 1 are disposed up and down on the pier stud 5, referring to fig. 2 and 3, the locking hoops 1 include a support 105 and arms symmetrically disposed on two sides of the support 105, the arms are rotatably connected with the support 105, the arms are configured with a driving assembly, the driving assembly is used for controlling the arms to rotate and unfold or fold, so as to achieve that the locking hoops 1 fold and fix on the pier stud 5 or unfold and release the pier stud 5, one end of the arms is configured with a locking mechanism 3, the other arm is configured with a locking member 31 matched with the locking mechanism 3, and the locking mechanism 3 is used for releasing or locking the locking member 31, so as to achieve locking of the two arms and fix the locking position of the locking hoops 1. When the cross beam 51 between the pier studs 5 on the two sides needs to be crossed, the locking mechanism 3 is unlocked through the locking hoop 1, the arm is opened to avoid the cross beam 51, the multistage oil cylinder 2 is used for stretching, and the effect that the locking hoop 1 spans the cross beam 51 is achieved.
Referring to fig. 2 and 3, the arm comprises a first mechanical arm 101 and a second mechanical arm 102 which are hinged to each other, the first mechanical arm 101 is hinged to a support 105, the driving assembly comprises a first telescopic cylinder 103 and a second telescopic cylinder 104, one end of the first telescopic cylinder 103 is hinged to the support 105, the other end of the first telescopic cylinder 103 is linked with the first mechanical arm 101, the rotation of the first mechanical arm 101 is controlled by controlling the extension or shortening of the first telescopic cylinder 103, one end of the second telescopic cylinder 104 is hinged to the first telescopic cylinder 103, the other end of the second telescopic cylinder 104 is hinged to the second telescopic cylinder 104, the rotation of the second mechanical arm 102 is controlled by controlling the extension or shortening of the second telescopic cylinder 104, and further the opening or closing control of the arm is realized, the arm is arranged into two sections of mechanical arms, and the arm is pressed by the telescopic cylinders respectively, so that the holding force of the arm to a pier 5 is improved, the locking effect of the arm to the pier is ensured, and the safety is improved.
Referring to fig. 1, the multi-stage oil cylinder 2 is disposed on a support 105 of one locking anchor ear 1, the driving end of the multi-stage oil cylinder 2 is fixedly connected with the support 105 of the other locking anchor ear 1, and the multi-stage oil cylinder 2 is utilized to realize the height adjustment between the two locking anchor ears 1.
Through the arrangement, when climbing the bridge pier 5, firstly, the locking anchor ear 1 positioned above is controlled to open the arms, then the multistage oil cylinder 2 is controlled to extend to move the locking anchor ear 1 above to rise, then the first telescopic cylinder 103 and the second telescopic cylinder 104 of the locking anchor ear 1 above are controlled to fold the two arms, then the two arms are locked through the locking mechanism 3 to realize the fixation of the locking anchor ear 1 above, then the first telescopic cylinder 103 and the second telescopic cylinder 104 of the locking anchor ear 1 below are controlled to open the two arms, then the multistage oil cylinder 2 is controlled to shorten to move the locking anchor ear 1 below to rise, finally, the arm is folded in a control manner, the locking mechanism 3 locks the arm to complete climbing, after the climbing is repeatedly performed, the bridge pier 5 can be moved at any height, the arm is segmented to be a first mechanical arm 101 and a second mechanical arm 102, swing arm control is performed through a first telescopic cylinder 103 and a second telescopic cylinder 104 respectively, the shape of the pier 5 can be better adapted, the anchor ear can be better attached to the outer wall of the pier for locking, the anchor ear can be better pressed by the two telescopic cylinders, the holding force of the anchor arm to the pier is improved, the locking effect of the anchor ear to the pier is guaranteed, and the safety is improved.
Referring to fig. 2 and 4, the locking mechanism 3 includes a lock catch 32 and a telescopic portion, the lock member 31 is hooked, the lock member 31 may be hooked on the lock catch 32, the telescopic portion is connected with the lock catch 32 and is used for driving the lock catch 32 to move linearly, when the arm is folded, the lock member 31 is hooked on the lock catch 32 by adjusting the telescopic portion, and the telescopic portion is shortened, so that the two hoops are locked and fixed to avoid slipping.
Further, in this embodiment, the telescopic portion includes a gear box 331, a gear motor 332 disposed on an outer wall of the gear box 331, and a screw rod 333 slidingly disposed in the gear box 331, through holes matched with the screw rod 333 are correspondingly formed on two side walls of the gear box 331, the screw rod 333 is slidingly disposed in the through holes, an end portion of the screw rod 333 is fixedly connected with the lock catch 32, a first bevel gear 334 is screwed on an outer wall of the screw rod 333, the first bevel gear 334 is disposed on an inner wall of the gear box 331 through a bearing, the gear motor 332 is disposed with a driving shaft 335, one end of the driving shaft 335 penetrates into the gear box 331 and is disposed with a second bevel gear 336, the first bevel gear 334 and the second bevel gear 336 are meshed, when the gear motor 332 rotates, the driving shaft 335 and the second bevel gear 336 are driven to rotate, and then the first bevel gear 334 is driven to rotate, under the action of the threaded connection between the first bevel gear 334 and the screw rod 333, the screw rod 333 is driven to perform linear movement, and the locking effect of the locking mechanism 3 is ensured by means of threaded engagement of the screw rod 333.
Referring to fig. 2, the gear box 331 is slidably provided with a plurality of support rods 34, in this embodiment, two support rods 34 are adopted, the support rods 34 are parallel to the screw 333, the support rods 34 are fixedly connected with the lock catches 32, and the support rods 34 are used for guiding the lock catches 32.
Referring to fig. 3, the gear box 331 is rotatably disposed on the second mechanical arm 102, a plurality of third telescopic cylinders 35 are further disposed between the second mechanical arm 102 and the gear box 331, the third telescopic cylinders 35 are used for driving the gear box 331 to rotate, in order to improve stability of the gear box 331, the embodiment is configured with a pair of third telescopic cylinders 35, and the pair of third telescopic cylinders 35 are used for synchronously extending or shortening, so as to realize rotation of the gear box 331, thereby realizing adjustment of positions of the screw 333 and the lock catch 32 by adjusting rotation of the gear box 331, and facilitating hooking of the padlock member 31.
Referring to fig. 2, in this embodiment, a plurality of channels are further configured on the inner wall of the support 105, a fourth telescopic cylinder (not shown) is configured in the channels, a roller 4 is configured at an end of the fourth telescopic cylinder, the fourth telescopic cylinder is used for controlling the roller 4 to extend out of the channels or retract into the channels, the roller 4 is controlled to extend out of the channels, so as to realize rolling sliding between the locking hoops 1 and the pier 5, so as to facilitate climbing, in addition, the axle center distance between the left locking hoops 1 and the right locking hoops 1 can be adjusted by extending out of the roller 4, and further, the distance change between the two pier 5 is adaptively realized during the climbing process.
Example 2
The embodiment provides a modular bridge pier climbing device, the basic structure of this embodiment is the same as embodiment 1, the difference lies in: the embodiment further includes a plurality of wedge blocks 7, please refer to fig. 5 and 6, the wedge blocks 7 are arc blocks attached to the arc of the arm, the inner side wall of the wedge blocks 7 is a conical surface, the wedge blocks 7 are detachably configured on the inner side wall of the locking hoop 1 through bolts so as to adjust the inner diameter of the locking hoop 1, specifically, when the diameter of a pier column is smaller, please refer to fig. 5, 3 wedge blocks 7 are respectively configured on the inner side wall of the support 105 and the inner side walls of the two first mechanical arms 101 so as to reduce the inner diameter of the locking hoop 1, the angle of the first mechanical arms 101 is adjusted by using the first telescopic cylinder 103, the 3 wedge blocks 7 are wrapped around and tightly attached to the outer wall of the pier column 5, and finally, the two arm is locked through the locking mechanism 3.
Example 3
Referring to fig. 7, the present embodiment provides a working platform based on a modular bridge pier climbing device, which includes a pair of modular bridge pier climbing devices 100 according to embodiment 1 or embodiment 2, wherein two modular bridge pier climbing devices 100 are respectively disposed on bridge pier 5, a working platform 6 is connected between two modular bridge pier climbing devices 100, a guardrail can be disposed on the periphery of the working platform 6 to improve safety, the modular bridge pier 5 climbing devices 100 are utilized to climb to realize the adjustment of the position of the working platform 6, and in addition, when a cross beam 51 is disposed between two piers, the cross beam 51 can be spanned by opening and closing of a clasping arm.
In this embodiment, the first telescopic cylinder 103, the second telescopic cylinder 104 and the third telescopic cylinder 35 need to be hydraulic cylinders to ensure the bearing requirement.
The process of climbing the cross beam 51 in this embodiment is as follows:
firstly, controlling two locking hoops 1 positioned above to open arms, the opening size of the arms is larger than the width of a cross beam 51, then controlling a multi-stage oil cylinder 2 to extend to move the locking hoops 1 above to rise to cross the cross beam 51, then controlling a first telescopic cylinder 103 and a second telescopic cylinder 104 of the locking hoops 1 above to fold the two arms, then locking the two arms through a locking mechanism 3 to fix the locking hoops 1 above, then controlling the first telescopic cylinder 103 and the second telescopic cylinder 104 of the locking hoops 1 below to open the two arms, then controlling the multi-stage oil cylinder 2 to shorten to move and rise to cross the locking hoops 1 below, and finally controlling the arms to fold, and controlling the locking mechanism 3 to lock the arms to finish the crossing of the cross beam 51.
Example 4
The embodiment provides a pier detection device based on a modularized bridge pier climbing device, which comprises the modularized bridge pier climbing device 100 according to embodiment 1 or embodiment 2, wherein a plurality of detection devices are configured on the outer wall of the locking hoop 1, and the detection devices are used for detecting the pier 5. The modularized bridge pier 5 climbing device 100 is utilized to drive the detection equipment to climb and walk on the bridge pier, so that the comprehensive detection of the bridge pier is realized.
In particular, the detection device includes a camera device and a photographing device, and the camera device or the photographing device is used for photographing an image of the outer wall of the pier, so that a worker can judge the condition of the pier according to the image.
In this embodiment, the first telescopic cylinder 103, the second telescopic cylinder 104 and the third telescopic cylinder 35 may be small hydraulic cylinders, electric telescopic cylinders, air cylinders or the like, so as to reduce the weight of the climbing device 100 for the modular bridge pier 5, and may be capable of carrying the climbing of the detection equipment or other small equipment.
The above is only a preferred embodiment of the present utility model, and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (8)

1. A modular bridge pier climbing device comprising:
the locking hoops are arranged on the pier column up and down, the locking hoops comprise a support and arms symmetrically arranged on two sides of the support, the arms are rotatably connected with the support, the arms are provided with driving components which are used for controlling the arms to be unfolded or folded in a rotating way, one end part of each arm is provided with a locking mechanism, the other arm is provided with a locking piece matched with the locking mechanism, the locking mechanism is used for releasing or locking the locking piece,
the multistage oil cylinder is configured on the support of one locking hoop, and the driving end of the multistage oil cylinder is fixedly connected with the support of the other locking hoop.
2. A modular bridge pier climbing device in accordance with claim 1, wherein,
the arm is including first arm and the second arm of articulated setting each other, first arm sets up with the support is articulated, drive assembly includes first flexible jar and the flexible jar of second, the one end of first flexible jar articulates and disposes in the support, the other end and the first arm of first flexible jar are linked, the one end of the flexible jar of second articulates and disposes in first flexible jar, the other end of the flexible jar of second articulates and disposes in the flexible jar of second.
3. The modular bridge pier climbing device according to claim 1, wherein the locking mechanism comprises a lock catch and a telescopic part, the lock member is hook-shaped, the lock member can be hooked on the lock catch, and the telescopic part is connected with the lock catch and used for driving the lock catch to move linearly.
4. A modular bridge pier climbing device according to claim 3, wherein the telescopic part comprises a gear box, a gear motor arranged on the outer wall of the gear box, and a screw rod slidably arranged in the gear box, the end part of the screw rod is fixedly connected with the lock catch, the outer wall of the screw rod is in threaded connection with a first bevel gear, the gear motor is provided with a driving shaft, one end of the driving shaft penetrates into the gear box and is provided with a second bevel gear, and the first bevel gear and the second bevel gear are meshed.
5. The modular bridge pier climbing device according to claim 4, wherein the gear box is slidably provided with a plurality of support rods, the support rods are arranged in parallel with the screw rod, and the support rods are fixedly connected with the lock catches.
6. The modular bridge pier climbing device according to claim 5, wherein the gear box is rotatably arranged on the second mechanical arm, and a plurality of third telescopic cylinders are further arranged between the second mechanical arm and the gear box and used for driving the gear box to rotate.
7. The modular bridge pier climbing device according to claim 1, wherein the support has a plurality of channels disposed on an inner wall thereof, and a fourth telescoping cylinder disposed in the channels, the fourth telescoping cylinder having rollers disposed on ends thereof, the fourth telescoping cylinder configured to control the rollers to extend out of or retract into the channels.
8. The modular bridge pier climbing device of claim 1, further comprising a plurality of wedge blocks removably disposed on the inner sidewall of the locking collar for adjusting the inner diameter of the locking collar.
CN202321928772.2U 2023-07-21 2023-07-21 Modularized bridge pier column climbing device Active CN220724846U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202321928772.2U CN220724846U (en) 2023-07-21 2023-07-21 Modularized bridge pier column climbing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202321928772.2U CN220724846U (en) 2023-07-21 2023-07-21 Modularized bridge pier column climbing device

Publications (1)

Publication Number Publication Date
CN220724846U true CN220724846U (en) 2024-04-05

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ID=90499544

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202321928772.2U Active CN220724846U (en) 2023-07-21 2023-07-21 Modularized bridge pier column climbing device

Country Status (1)

Country Link
CN (1) CN220724846U (en)

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