CN111945661A - Air pipe surrounding well - Google Patents

Air pipe surrounding well Download PDF

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Publication number
CN111945661A
CN111945661A CN202010826163.0A CN202010826163A CN111945661A CN 111945661 A CN111945661 A CN 111945661A CN 202010826163 A CN202010826163 A CN 202010826163A CN 111945661 A CN111945661 A CN 111945661A
Authority
CN
China
Prior art keywords
fixing
plate
plates
well
limiting
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.)
Pending
Application number
CN202010826163.0A
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Chinese (zh)
Inventor
刘尊渠
许晓达
范瑜
李全昆
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shanghai Waigaoqiao Shipbuilding Co Ltd
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Shanghai Waigaoqiao Shipbuilding Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Shanghai Waigaoqiao Shipbuilding Co Ltd filed Critical Shanghai Waigaoqiao Shipbuilding Co Ltd
Priority to CN202010826163.0A priority Critical patent/CN111945661A/en
Publication of CN111945661A publication Critical patent/CN111945661A/en
Pending legal-status Critical Current

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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
    • E02B3/04Structures or apparatus for, or methods of, protecting banks, coasts, or harbours
    • E02B3/10Dams; Dykes; Sluice ways or other structures for dykes, dams, or the like
    • E02B3/106Temporary dykes
    • E02B3/108Temporary dykes with a filling, e.g. filled by water or sand
    • 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
    • E02B3/16Sealings or joints

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Environmental & Geological Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Revetment (AREA)

Abstract

The invention discloses an air pipe surrounding well, which comprises four fixing plates, four connecting plates, a fixing mechanism, a supporting mechanism and a splicing mechanism, wherein the four fixing plates are arranged: through inwards folding the connecting plate, can effectually reduce the volume of enclosing the well, conveniently enclose the holistic transportation of well, when needs extensive rescue relief, the disposable transportation quantity of enclosing the well has been improved, thereby the efficiency of rescue relief is improved, it is fixed through supporting mechanism directly to expand the connecting plate, make the installation of enclosing the well quicker, the time that the concatenation piece concatenation of use is used to have been practiced thrift, thereby the installation effectiveness of enclosing the well has been improved, can install the height of enclosing the well according to the water level height of difference through splicing mechanism, it is too high to have solved the enclosing well, the wasting of resources and the inconvenient problem of operation that cause, it is low excessively to have solved the enclosing well simultaneously, lead to the problem that can't play the flood fighting effect, the use flexibility and the practicality of enclosing the well have been improved.

Description

Air pipe surrounding well
Technical Field
The invention relates to a surrounding well, in particular to an air pipe surrounding well, and belongs to the technical field of defense improvement and protection.
Background
The cofferdam is a small round bank with inverted filter equipment built by soil bags at the position of a dike leak outlet, and water leaking into the cofferdam raises the water level in the well. The top of the well is provided with a water pipe to maintain a certain water level in the well so as to reduce the seepage velocity and avoid the enlargement of the leak. The water level in the surrounding well is not suitable to be too high so as to prevent the slope from being loosened and generate new slope collapse danger, so that the method is a temporary emergency measure for blocking the leak of the dike, and needs to be rebuilt again after the flood so as to thoroughly eliminate the hidden danger of the leak.
When the surrounding well is used for carrying out the emergency rescue, the surrounding well is of a barrel-shaped structure, the occupied area is large, the transportation is inconvenient, the one-time transportation quantity is limited, the surrounding well cannot be rapidly transported to a disaster relief site in the large-scale emergency rescue process, the emergency rescue efficiency can be delayed, meanwhile, when the integrally spliced surrounding well is used, the spliced blocks need to be spliced to the surrounding well main body one by one, the operation efficiency is low, the surrounding well cannot be used under the condition of inconvenient emergency rescue, the height of the surrounding well cannot be adjusted through the height of the water level, the waste of resources and the operation of inconvenient personnel are caused when the surrounding well is too high, when the surrounding well is too low, the good emergency rescue effect cannot be achieved, and the practicability of the surrounding well is reduced.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide an air pipe surrounding well, which effectively solves the problems in the prior art.
The technical scheme for realizing the purpose is as follows:
the air pipe surrounding well comprises four fixed plates, connecting plates, fixing mechanisms, supporting mechanisms and splicing mechanisms, wherein two sides of each of the four fixed plates are hinged to one connecting plate through hinges, two adjacent connecting plates are hinged to one another through hinges, the fixing mechanisms are fixedly connected to the outer sides of the four fixed plates and the connecting plates, two supporting mechanisms are fixedly connected to the joints of the inner sides of the four fixed plates and the connecting plates, the two supporting mechanisms are located on the same vertical plane and are vertically and symmetrically distributed, mounting grooves are formed in the upper ends and the lower ends of the four fixed plates and the connecting plates, and the splicing mechanisms are clamped in the two vertically adjacent mounting grooves.
As a preferable technical scheme of the invention, the hinges at the joints of the four fixed plates and the connecting plates are all positioned at the inner side of the connecting plates, the hinges at the joints of two adjacent connecting plates are all positioned at the outer side of the connecting plates, and the hinges at the outer sides of the hinges and at the joints of the fixed plates and the connecting plates and the joints of two adjacent connecting plates are all fixedly connected with a sealing film.
As a preferred technical scheme of the present invention, the fixing mechanism includes fixing side plates, four supporting frames, four fixing cover plates, connecting holes, and fixing nuts, the upper and lower ends of the outer sides of the four fixing plates are fixedly connected with one fixing side plate, and the four supporting frames respectively penetrate through the corresponding fixing side plates.
As a preferred technical scheme of the invention, the upper ends of the four support frames are clamped with a fixed cover plate, the fixed cover plate and the four support frames are respectively provided with a connecting hole at the corresponding position, and the upper ends of the four support frames penetrate through the connecting holes and are in threaded connection with a fixing nut.
As a preferred technical scheme of the invention, the supporting mechanisms respectively comprise two supporting rods, a fixing bolt, a fixing nut, an anti-skid gasket and an anti-skid rubber pad, the two supporting rods are respectively and rotatably connected to the inner walls of the connected fixing plate and the connecting plate, one ends of the two supporting rods, far away from the fixing plate and the connecting plate, are rotatably connected through the fixing bolt, and the lower end of the fixing bolt penetrates through the two supporting rods and is in threaded connection with the fixing nut.
As a preferable technical scheme of the invention, the fixing bolt is provided with an anti-skid gasket which is arranged between the fixing nut and the support rod in a sliding way, the joint of the two support rods is fixedly connected with an anti-skid rubber pad, and one side of the anti-skid rubber pad, which is far away from the support rod, is contacted.
According to a preferred technical scheme, the splicing mechanisms all comprise splicing plates, limiting blocks and limiting grooves, the splicing plates are all clamped in two vertically adjacent mounting grooves, four mounting holes are symmetrically formed in two sides of each splicing plate, the four mounting holes are respectively located at four corners of the side face of each splicing plate, a limiting plate is connected in each mounting hole in a sliding mode, a limiting spring is fixedly connected between each limiting plate and the inner side wall of each mounting hole, one side, far away from the limiting spring, of each limiting plate is fixedly connected with one limiting block, one limiting groove is formed in each mounting groove and corresponds to the corresponding mounting hole, and one end, far away from the limiting plate, of each limiting block penetrates through the corresponding mounting hole and is clamped in the corresponding limiting groove.
As a preferred technical scheme of the invention, the upper ends and the lower ends of the four fixing plates and the connecting plate are fixedly connected with a sealing gasket, and the upper adjacent sealing gasket and the lower adjacent sealing gasket are contacted.
The invention has the beneficial effects that:
1. the connecting plates are folded inwards, so that the volume of the surrounding well can be effectively reduced, the whole surrounding well can be conveniently transported, and when large-scale emergency rescue and disaster relief are needed, the one-time transportation quantity of the surrounding well is increased, and the emergency rescue and disaster relief efficiency is improved.
2. The connecting plate is unfolded and directly fixed through the supporting mechanism, so that the surrounding well is installed more rapidly, the time required for splicing the splicing blocks is saved, and the installation efficiency of the surrounding well is improved.
3. Can install the height of enclosing the well according to the water level height of difference through concatenation mechanism, solve to enclose the well too high, the wasting of resources that causes and operate inconvenient problem, solved to enclose the well simultaneously and crossed lowly, lead to the problem that can't play the flood fighting effect, improved the use flexibility and the practicality of enclosing the well.
Drawings
FIG. 1 is a schematic view of the splice appearance structure of the present invention;
FIG. 2 is a schematic top view of the present invention;
FIG. 3 is an enlarged schematic view of the structure of FIG. 2 at A in accordance with the present invention;
FIG. 4 is a schematic structural view of the support mechanism of the present invention;
FIG. 5 is a side sectional view of the splicing mechanism of the present invention;
FIG. 6 is a schematic view of the front appearance of the splicing mechanism of the present invention;
fig. 7 is a schematic view of the structure of the fixed cover plate of the present invention.
In the figure: 1. a fixing plate; 2. a connecting plate; 3. a fixing mechanism; 31. fixing the side plate; 32. a support frame; 33. fixing the cover plate; 34. connecting holes; 35. fixing a nut; 4. mounting grooves; 5. a support mechanism; 51. a support bar; 52. fixing the bolt; 53. fixing a nut; 54. an anti-slip gasket; 55. an anti-skid rubber pad; 6. a hinge; 7. a sealing film; 8. a splicing mechanism; 81. splicing plates; 82. mounting holes; 83. a limiting plate; 84. a limiting spring; 85. a limiting block; 86. a limiting groove; 9. and a gasket.
Detailed Description
The invention will be further explained with reference to the drawings.
As shown in fig. 1-7, the invention provides an air pipe surrounding well, which comprises four fixed plates 1, four connecting plates 2, four fixing mechanisms 3, two supporting mechanisms 5 and a splicing mechanism 8, wherein two sides of each of the four fixed plates 1 are hinged with one connecting plate 2 through hinges 6, two adjacent connecting plates 2 are hinged through hinges 6, one fixing mechanism 3 is fixedly connected to the outer sides of the four fixed plates 1 and the connecting plates 2, two supporting mechanisms 5 are fixedly connected to the joints of the inner sides of the four fixed plates 1 and the connecting plates 2, the two supporting mechanisms 5 are vertically and symmetrically distributed on the same vertical plane, the upper ends and the lower ends of the four fixed plates 1 and the connecting plates 2 are respectively provided with one mounting groove 4, and the splicing mechanism 8 is clamped in the two vertically adjacent mounting grooves 4.
Wherein, fixed establishment 3 includes fixed sideboard 31, support frame 32, fixed apron 33, connecting hole 34, fixation nut 35, four fixed sideboard 31 of equal fixedly connected with in both ends about the fixed plate 1 outside, support frame 32 is provided with four, four support frame 32 passes corresponding fixed sideboard 31 respectively, and fixed establishment 3 can be fixed subaerial with enclosing the well.
Wherein, four support frame 32 upper end joint has a fixed cover plate 33, a connecting hole 34 has all been seted up on fixed cover plate 33 and the corresponding position of four support frames 32, four support frame 32 upper end all passes connecting hole 34 and threaded connection has a fixation nut 35, and fixed cover plate 33 can effectually prevent that support frame 32 upper end from rocking.
Wherein, supporting mechanism 5 all includes two bracing pieces 51, fixing bolt 52, fixation nut 53, anti-skidding gasket 54 and anti-skidding rubber pad 55, two bracing piece 51 swivelling joint respectively on the fixed plate 1 and the connecting plate 2 inner wall that are connected, two bracing piece 51 is kept away from fixed plate 1 and connecting plate 2 one end and is passed through fixing bolt 52 swivelling joint, two bracing piece 51 and threaded connection have a fixation nut 53, and supporting mechanism 5 can prevent to collapse when the weijing uses.
Wherein, on fixing bolt 52 and be located equal sliding connection between fixing nut 53 and the bracing piece 51 and have a skid resistant pad 54, two equal fixedly connected with a skid resistant rubber pad 55 of bracing piece 51 junction, skid resistant rubber pad 55 is kept away from bracing piece 51 one side and is contacted, and skid resistant pad 54 can prevent that fixing bolt 52 is not hard up or drops, and skid resistant rubber pad 55 can increase the frictional force between two bracing pieces 51.
Wherein, the splicing mechanisms 8 all comprise splicing plates 81, limiting blocks 85 and limiting grooves 86, the splicing plates 81 are all clamped in the two adjacent mounting grooves 4 at the upper part and the lower part, four mounting holes 82 are symmetrically arranged at two sides of the splicing plates 81, the four mounting holes 82 are respectively positioned at four corners of the side surfaces of the splicing plates 81, a limiting plate 83 is slidably connected in each of the four mounting holes 82, a limiting spring 84 is fixedly connected between the limiting plate 83 and the inner side wall of the mounting hole 82, one side of the limiting plate 83 far away from the limiting spring 84 is fixedly connected with a limiting block 85, a position corresponding to the mounting hole 82 in the mounting groove 4 is provided with a limit groove 86, the limiting block 85 is far away from one end of the limiting plate 83, penetrates through the mounting hole 82 and is clamped in the limiting groove 86, and the splicing mechanism 8 can adjust the height of the surrounding well according to the height of the water level.
Wherein, four both ends are sealed 9 of sealed pad of equal fixedly connected with about fixed plate 1 and the connecting plate 2, adjacent two from top to bottom sealed pad 9 contacts, and sealed pad 9 can effectually prevent that two adjacent fixed plate 1 and connecting plate 2 gap department from leaking from top to bottom.
Wherein, four fixed plate 1 all is located 2 inboards, adjacent two with connecting plate 2 junction hinge 6 all is located the 2 outsides of connecting plate, 6 outsides of hinge just are located fixed plate 1 and 2 junctions of connecting plate and two equal fixedly connected with seal membrane 7 of 2 junctions of adjacent connecting plate, and seal membrane 7 can effectually prevent the problem that 6 departments of hinge leaked.
Specifically, when the present invention is stored, firstly, the fixing nut 35 is rotated to enable the fixing nut 35 to be positioned at the upper end of the support frame 32 to move upwards, and the fixing nut 35 is separated from the upper end of the support frame 32, then the fixing cover plate 33 is taken down from the upper end of the support frame 32, then the fixing nut 35 is rotated to enable the fixing nut 53 to be positioned on the fixing bolt 52 to move downwards, finally the fixing nut 53 is separated from the fixing bolt 52, finally the connecting part of two adjacent connecting plates 2 is pushed to enable the connecting plates 2 to be folded inwards, so that the whole volume of the enclosed well is reduced, when the enclosed well needs to be unfolded, the connecting plates 2 are firstly pulled, then the fixing nuts 53 are rotated to enable the adjacent supporting rods 51 to be mutually extruded and fixed, so that the connecting plates 2 are fixed at two sides of the fixing plate 1, then the four support frames 32 respectively pass through the corresponding fixing side plates 31, finally will fix the apron 33 joint to four support frames 32 upper ends again, accomplish the installation to enclosing the well, and easy operation is convenient, when needs are to be spliced highly to enclosing the well, at first inject splice plate 81 lower extreme into corresponding fixed plate 1 and connecting plate 2 upper end mounting groove 4 respectively, stopper 85 joint that makes is to the spacing groove 86 on the 4 inner walls of mounting groove, then go into splice plate 81 with another fixed plate 1 and mounting groove 4 card of connecting plate 2 lower extreme again, at last will fix the apron 33 joint to the top of enclosing the well again, accomplish the concatenation to enclosing the well height, realize according to the height of highly free adjustment enclosing the well of water level, the use flexibility and the practicality of enclosing the well have been increased.
The above embodiments are provided only for illustrating the present invention and not for limiting the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and therefore all equivalent technical solutions should also fall within the scope of the present invention, and should be defined by the claims.

Claims (8)

1. An air pipe surrounding well comprises a fixing plate (1), a connecting plate (2), a fixing mechanism (3), a supporting mechanism (5) and a splicing mechanism (8), its characterized in that, fixed plate (1) is provided with four, four fixed plate (1) both sides all articulate through hinge (6) have one connecting plate (2), adjacent two connecting plate (2) all articulate through hinge (6), four fixed plate (1) and connecting plate (2) outside fixed connection have one fixed establishment (3), four fixed plate (1) inboard and two supporting mechanism (5) of the equal fixedly connected with of connecting plate (2) junction, two supporting mechanism (5) are located same vertical plane longitudinal symmetry and distribute, four a mounting groove (4), adjacent two from top to bottom have all been seted up at both ends about fixed plate (1) and connecting plate (2) equal joint has one concatenation mechanism (8) in mounting groove (4).
2. The air pipe box according to claim 1, wherein four hinges (6) at the joints of the fixing plates (1) and the connecting plates (2) are all located on the inner side of the connecting plates (2), two adjacent hinges (6) at the joints of the connecting plates (2) are all located on the outer side of the connecting plates (2), one sealing film (7) is fixedly connected to the outer side of each hinge (6) at the joint of the fixing plate (1) and the connecting plate (2) and the joint of two adjacent connecting plates (2).
3. The air pipe lateral according to claim 1, wherein the fixing mechanism (3) comprises four fixing side plates (31), four supporting frames (32), four fixing cover plates (33), a connecting hole (34) and a fixing nut (35), the four fixing side plates (31) are fixedly connected to the upper and lower ends of the outer side of the four fixing plates (1), the four supporting frames (32) are arranged, and the four supporting frames (32) respectively penetrate through the corresponding fixing side plates (31).
4. The air pipe lateral according to claim 3, wherein a fixing cover plate (33) is fastened to the upper ends of the four support frames (32), a connecting hole (34) is formed in the position of the fixing cover plate (33) corresponding to the four support frames (32), and the upper ends of the four support frames (32) penetrate through the connecting hole (34) and are in threaded connection with a fixing nut (35).
5. The air pipe box according to claim 1, wherein the support mechanisms (5) each comprise two support rods (51), a fixing bolt (52), a fixing nut (53), an anti-slip gasket (54) and an anti-slip rubber pad (55), the two support rods (51) are respectively and rotatably connected to the inner walls of the connecting plate (2) and the fixing plate (1) which are connected with each other, one ends of the two support rods (51) far away from the connecting plate (2) and the fixing bolt (2) are rotatably connected through the fixing bolt (52), and the lower end of the fixing bolt (52) penetrates through the two support rods (51) and is in threaded connection with the fixing nut (53).
6. The air pipe box according to claim 5, wherein an anti-skid gasket (54) is slidably connected to the fixing bolt (52) between the fixing nut (53) and the support rod (51), an anti-skid rubber pad (55) is fixedly connected to the joint of the two support rods (51), and one side of the anti-skid rubber pad (55) far away from the support rod (51) is in contact with the side.
7. The air pipe surrounding well according to claim 1, wherein the splicing mechanisms (8) each comprise a splicing plate (81), a limiting block (85) and a limiting groove (86), the splicing plates (81) are respectively clamped in two adjacent mounting grooves (4) at the upper part and the lower part, four mounting holes (82) are symmetrically formed in two sides of each splicing plate (81), the four mounting holes (82) are respectively located in four corners of the side surface of each splicing plate (81), a limiting plate (83) is respectively connected in each mounting hole (82) in a sliding manner, a limiting spring (84) is fixedly connected between each limiting plate (83) and the inner side wall of each mounting hole (82), one side of each limiting plate (83) far away from each limiting spring (84) is fixedly connected with one limiting block (85), and one limiting groove (86) is formed in each mounting groove (4) and corresponds to the corresponding mounting hole (82), one end, far away from the limiting plate (83), of the limiting block (85) penetrates through the mounting hole (82) and is clamped in the limiting groove (86).
8. The air pipe lateral according to claim 1, wherein a gasket (9) is fixedly connected to each of the upper and lower ends of the four fixing plates (1) and the connecting plate (2), and two adjacent gaskets (9) are in contact.
CN202010826163.0A 2020-08-17 2020-08-17 Air pipe surrounding well Pending CN111945661A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112942335A (en) * 2021-02-02 2021-06-11 阳江市源丰建设工程有限公司 Synchronous waterproof anti-collapse hole device and method

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7303358B1 (en) * 2003-09-11 2007-12-04 Fuller Charles L Reconfigurable barrier system
CN201074313Y (en) * 2006-12-25 2008-06-18 陈伟 Portable assembled earthwork cloth relief bounding well (water keeping basin)
CN107022976A (en) * 2017-05-11 2017-08-08 合肥学院 A kind of assembled for punishing piping encloses well and its construction method
CN206844052U (en) * 2017-04-17 2018-01-05 贝特(杭州)工业机械有限公司 A kind of detachable anti-flood water blocking plate
CN207047782U (en) * 2017-08-01 2018-02-27 王立朝 A kind of movable flood dam in city
CN207619917U (en) * 2017-12-19 2018-07-17 天本国际科技发展(北京)有限公司 Well is enclosed in a kind of anti-piping of assembled
CN208039150U (en) * 2018-02-06 2018-11-02 广东建旭实业有限公司 One kind enclosing well
CN208633049U (en) * 2018-08-15 2019-03-22 石家庄逐浪水利科技有限公司 Assembled group surrounds well
CN208844595U (en) * 2018-09-21 2019-05-10 河北天扩电气设备集团有限公司 Well is enclosed in a kind of novel fabricated flood control
CN208917763U (en) * 2018-07-25 2019-05-31 河北承江应急装备科技有限公司 Well is enclosed in a kind of anti-piping
CN210216298U (en) * 2019-03-27 2020-03-31 青海禹辰水利水电有限公司 Combined type trench flood control wall

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7303358B1 (en) * 2003-09-11 2007-12-04 Fuller Charles L Reconfigurable barrier system
CN201074313Y (en) * 2006-12-25 2008-06-18 陈伟 Portable assembled earthwork cloth relief bounding well (water keeping basin)
CN206844052U (en) * 2017-04-17 2018-01-05 贝特(杭州)工业机械有限公司 A kind of detachable anti-flood water blocking plate
CN107022976A (en) * 2017-05-11 2017-08-08 合肥学院 A kind of assembled for punishing piping encloses well and its construction method
CN207047782U (en) * 2017-08-01 2018-02-27 王立朝 A kind of movable flood dam in city
CN207619917U (en) * 2017-12-19 2018-07-17 天本国际科技发展(北京)有限公司 Well is enclosed in a kind of anti-piping of assembled
CN208039150U (en) * 2018-02-06 2018-11-02 广东建旭实业有限公司 One kind enclosing well
CN208917763U (en) * 2018-07-25 2019-05-31 河北承江应急装备科技有限公司 Well is enclosed in a kind of anti-piping
CN208633049U (en) * 2018-08-15 2019-03-22 石家庄逐浪水利科技有限公司 Assembled group surrounds well
CN208844595U (en) * 2018-09-21 2019-05-10 河北天扩电气设备集团有限公司 Well is enclosed in a kind of novel fabricated flood control
CN210216298U (en) * 2019-03-27 2020-03-31 青海禹辰水利水电有限公司 Combined type trench flood control wall

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112942335A (en) * 2021-02-02 2021-06-11 阳江市源丰建设工程有限公司 Synchronous waterproof anti-collapse hole device and method

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Application publication date: 20201117