CN107724432A - A kind of town road plays lid arrangement with road surface manhole - Google Patents
A kind of town road plays lid arrangement with road surface manhole Download PDFInfo
- Publication number
- CN107724432A CN107724432A CN201710984828.9A CN201710984828A CN107724432A CN 107724432 A CN107724432 A CN 107724432A CN 201710984828 A CN201710984828 A CN 201710984828A CN 107724432 A CN107724432 A CN 107724432A
- Authority
- CN
- China
- Prior art keywords
- circular
- boatswain chair
- support
- lid
- transverse slat
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F19/00—Hoisting, lifting, hauling or pushing, not otherwise provided for
- B66F19/005—Lifting devices for manhole covers
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/12—Manhole shafts; Other inspection or access chambers; Accessories therefor
- E02D29/14—Covers for manholes or the like; Frames for covers
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Structural Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
Abstract
The invention discloses a kind of town road lid arrangement is played with road surface manhole, including supporting transverse slat, circular boatswain chair parallel with it is provided with the downside of the support transverse slat, the both ends of circular boatswain chair are provided with slip cap, through the screw axis for having screw thread mating connection therewith in slip cap, two suspension rods are provided with the circular boatswain chair, suspension rod top is provided with turning knob, suspension rod bottom is provided with a lid bar normal thereto, the lower end of the circular boatswain chair is additionally provided with multiple uplifting devices arranged in a ring, the uplifting device includes cylinder and the curved roof of inner barrel is stretched into upper end, the curved roof upper end is connected by holddown spring with inner barrel, the lower edge of the circular boatswain chair is additionally provided with baffle plate, the baffle plate is connected by top pressure spring with cylinder lateral wall.The present invention is simple in construction, and a lid heroic lovers is higher, and a lid is stable, is moved easily, easy to operate, manual labor is relatively low, and practicality is stronger.
Description
Technical field
The present invention relates to a kind of municipal construction equipment, specifically a kind of town road plays lid arrangement with road surface manhole.
Background technology
Municipal works refer to urban operating mechanism construction project.In China, urban operating mechanism refers in metropolitan district, town planning construction model
Enclose interior setting, provide paid or free public product and various buildings, the structure of service based on government responsibility and obligation for resident
Build thing, equipment etc..Municipal works have an important link during municipal sewage treatment, and sewage conduct can regularly be checked dimension
Shield, running into line clogging situation needs timely cesspool cover of opening to be cleared up.All it is artificial sub by existing using sled at present
Two cesspool covers on hole pried open, labor intensity is bigger, and operating efficiency easily damages well than relatively low
Lid, causes the well lid life-span relatively low.
The content of the invention
Lid arrangement is played with road surface manhole it is an object of the invention to provide a kind of town road, to solve above-mentioned background technology
The problem of middle proposition.
To achieve the above object, the present invention provides following technical scheme：
A kind of town road plays lid arrangement, including support transverse slat with road surface manhole, is all provided with the support transverse slat lower surface corner
Support column is equipped with, the lower end of the support column is mounted on shifting roller, is provided with the downside of the support transverse slat parallel with it
Circular boatswain chair, the both ends of circular boatswain chair are provided with slip cap, through there is the screw mandrel that screw thread is connected therewith in slip cap
Axle, the screw axis upper end by transmission mechanism and are arranged on branch with support transverse slat rotation connection, the upper end of two screw axis
The lid motor that rises on support transverse slat is connected, and two suspension rods is provided with the circular boatswain chair, suspension rod bottom is provided with normal thereto
Play lid bar, be additionally provided with limiting plate in the middle part of the suspension rod, the lower end of limiting plate passes through limit spring and circular boatswain chair upper end phase
Connection, the lower end of the circular boatswain chair are additionally provided with multiple uplifting devices arranged in a ring, the uplifting device include cylinder and
The curved roof of inner barrel is stretched into upper end, and the curved roof upper end is connected by holddown spring with inner barrel, described
Cylinder upper end is connected by sliding equipment with circular boatswain chair lower surface, and the lower edge of the circular boatswain chair is additionally provided with gear
Plate, the baffle plate are connected by top pressure spring with cylinder lateral wall, and the lower end of the curved roof is provided with the inclined inclination in side
Support block, helical axis is provided between two support columns of the same side, one end of helical axis is connected with fixed motor, institute
State and two sections of oppositely oriented spiral sections be provided with helical axis, movable sleeving with matching is provided with two sections of spiral sections,
The lower end of the movable sleeving is fixedly connected with L-shaped fixed mount, and fixed mount is provided with fixed arc close to the side of shifting roller
Plate.
As the further scheme of the present invention：The suspension rod top is provided with turning knob.
As further scheme of the invention：The mobile set upper side is provided with gag lever post, gag lever post upper end and support
Transverse slat is slidably connected.
As further scheme of the invention：The inner side circular diameter of the fixed arch plate and circular diameter on the outside of shifting roller
It is identical.
As further scheme of the invention：The sliding equipment includes the support being arranged on circular boatswain chair lower surface
Chute and the support slipper being arranged in support chute, support slipper lower end is fixedly connected with cylinder top.
As further scheme of the invention：The transmission mechanism includes the drive chain being arranged on lid electric machine main shaft
The driven sprocket on screw axis top is taken turns and is arranged on, driven sprocket is connected with drive sprocket by chain.
Compared with prior art, the beneficial effects of the invention are as follows：Setting shifting roller by fixed arch plate is rising
The stability for having ensured lid is fixed during lid, the fixation and rolling of roller are moved easily by the setting of helical axis and movable sleeving, is led to
Picking-up effect can be played to well lid during the setting well lid disengaging ground for crossing uplifting device, so as to ensure its stability, passes through two
The setting of individual screw axis and suspension rod facilitates well lid to sling, and reduces manual labor, and stable transmission, efficiency are higher.Present invention knot
Structure is simple, and a lid heroic lovers is higher, and plays lid stabilization, is moved easily, easy to operate, manual labor is relatively low, and practicality is stronger.
Brief description of the drawings
Fig. 1 is the structural representation that town road road surface manhole plays lid arrangement.
Fig. 2 is the structural representation that town road road surface manhole plays support column side view in lid arrangement.
Fig. 3 is the structural representation that town road road surface manhole plays uplifting device in lid arrangement.
Wherein：Support transverse slat 1, support column 2, shifting roller 3, circular boatswain chair 4, suspension rod 5, turning knob 6, a lid bar 7, limit
Position plate 8, holddown spring 9, screw axis 10, slip cap 11, a lid motor 12, drive sprocket 13, chain 14, driven sprocket 15, lift
Lifting device 16, support slipper 17, support chute 18, baffle plate 19, top pressure spring 20, spiral section 21, fixed motor 22, movable sleeving
23rd, fixed mount 24, fixed arch plate 25, curved roof 26, holddown spring 27, inclined shore block 28, cylinder 29, helical axis 30, limit
Position bar 31.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
Refer to Fig. 1~3, in the embodiment of the present invention, a kind of town road plays lid arrangement with road surface manhole, including support is horizontal
Plate 1, described support are provided with support column 2 at the lower surface corner of transverse slat 1, and the lower end of the support column 2 is mounted on moving rolling
Wheel 3, the downside of support transverse slat 1 are provided with circular boatswain chair 4 parallel with it, and the both ends of circular boatswain chair 4 are provided with slip cap 11,
Through there is the screw axis 10 that screw thread is connected therewith in slip cap 11, the upper end of screw axis 10 rotates with support transverse slat 1 to be connected
Connect, the upper end of two screw axis 1 is connected by transmission mechanism with the lid motor 12 that rises being arranged on support transverse slat 1, described
Transmission mechanism includes the drive sprocket 13 being arranged on the main shaft of lid motor 12 and the driven chain being arranged on the top of screw axis 10
Wheel 15, driven sprocket 15 is connected with drive sprocket 13 by chain 14, and two suspension rods 5 are provided with the circular boatswain chair 14,
The top of suspension rod 5 is provided with turning knob 6, and the bottom of suspension rod 5 is provided with a lid bar 7 normal thereto, and the middle part of suspension rod 5 is also set up
Limited location plate 8, the lower end of limiting plate 8 are connected by limit spring 9 with the circular upper end of boatswain chair 4, the lower end of the circular boatswain chair 4
Multiple uplifting devices arranged in a ring 16 are additionally provided with, the uplifting device 16 includes cylinder 29 and upper end is stretched into inside cylinder 29
Curved roof 26, the upper end of curved roof 26 by holddown spring 27 with being connected inside cylinder 29, on the cylinder 29
End is connected by sliding equipment with the circular lower surface of boatswain chair 4, and the sliding equipment includes being arranged on the circular lower surface of boatswain chair 4
Support chute 18 and the support slipper 17 that is arranged in support chute 18, the lower end of support slipper 17 and the top of cylinder 29, which are fixed, to be connected
Connect, the lower edge of the circular boatswain chair 4 is additionally provided with baffle plate 19, and the baffle plate 19 passes through top pressure spring 20 and the side wall of cylinder 29
It is connected, the lower end of the curved roof 26 is provided with the inclined inclined shore block 28 in side, two supports positioned at the same side
Helical axis 30 is provided between post 2, one end of helical axis 30 is connected with fixed motor 22, and two are provided with the helical axis 30
The oppositely oriented spiral section 21 of section, movable sleeving 23 with matching, the movable sleeving 23 are provided with two sections of spiral sections 21
Upper end is provided with gag lever post 31, and the upper end of gag lever post 31 is slidably connected with support transverse slat 1, and the lower end of movable sleeving 23, which is fixedly connected with, is in
The fixed mount 24 of L-type, fixed mount 24 are provided with fixed arch plate 25 close to the side of shifting roller 3, the fixed arch plate 25 it is interior
Side circular diameter is identical with the outside circular diameter of shifting roller 3.
The present invention operation principle be：The device is moved at well lid first, then starts fixed motor 22, fixed electricity
Machine 22 drives helical axis 30 to rotate, and helical axis 30 passes through two sections of spiral sections 21 and the cooperation fixed mount 24 of two movable sleevings 23
Moved at shifting roller 3, so that fixed arch plate 25 is stuck in shifting roller 3, so as to which shifting roller 3 be fixed, from
And the stability risen when covering of the device is ensure that, then push two suspension rods 5 so that two lower ends of suspension rod 5 are stretched on well lid
Strip through-hole in, then pass through turning knob 6 and rotate suspension rod 5 so that the lid bar 7 that rises of the lower end of suspension rod 5 is stuck on the downside of well lid, so
Started lid motor 12 afterwards, rise lid motor 12 by transmission mechanism drive two screw axis 10 rotate, screw axis 10 by with cunning
11 screw threads of dynamic set, which coordinate, drives circular boatswain chair 4 to move up, so as to extrude limit spring 9, so as to drive suspension rod 5 to move up, and suspension rod 5
Lower end rise lid bar 7 drive a well lid move up, when well lid depart from ground when, top pressure spring 20 left and right lower shell 29 close to well
Lid, the edge that well lid is held so as to the inclined shore block 28 of the lower end of cylinder 29 move up, so as to ensure that the device drives well lid to move
Dynamic stability.
It is obvious to a person skilled in the art that the invention is not restricted to the details of above-mentioned one exemplary embodiment, Er Qie
In the case of without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, embodiment all should be regarded as exemplary, and be nonrestrictive, the scope of the present invention is by appended power
Profit requires rather than described above limits, it is intended that all in the implication and scope of the equivalency of claim by falling
Change is included in the present invention.Any reference in claim should not be considered as to the involved claim of limitation.
Moreover, it will be appreciated that although the present specification is described in terms of embodiments, not each embodiment is only wrapped
Containing an independent technical scheme, this narrating mode of specification is only that those skilled in the art should for clarity
Using specification as an entirety, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
It is appreciated that other embodiment.
Claims (6)
1. a kind of town road plays lid arrangement, including support transverse slat with road surface manhole（1）, the support transverse slat（1）Lower surface four
Support column is provided with angle（2）, the support column（2）Lower end be mounted on shifting roller（3）, it is characterised in that it is described
Support transverse slat（1）Downside be provided with circular boatswain chair parallel with it（4）, circular boatswain chair（4）Both ends be provided with slip cap
（11）, slip cap（11）It is interior to pass through the screw axis for having that screw thread is connected therewith（10）, the screw axis（10）Upper end and support
Transverse slat（1）Rotation connection, two screw axis（1）Upper end by transmission mechanism and being arranged on support transverse slat（1）On rise lid
Motor（12）It is connected, the circular boatswain chair（14）On be provided with two suspension rods（5）, suspension rod（5）Bottom is provided with normal thereto
Rise lid bar（7）, the suspension rod（5）Middle part is additionally provided with limiting plate（8）, limiting plate（8）Lower end pass through limit spring（9）With
Circular boatswain chair（4）Upper end is connected, the circular boatswain chair（4）Lower end be additionally provided with multiple uplifting devices arranged in a ring
（16）, the uplifting device（16）Including cylinder（29）Cylinder is stretched into upper end（29）Internal curved roof（26）, the arc
Shape top plate（26）Upper end passes through holddown spring（27）With cylinder（29）Inside is connected, the cylinder（29）Upper end passes through skate machine
Structure and circular boatswain chair（4）Lower surface is connected, the circular boatswain chair（4）Lower edge be additionally provided with baffle plate（19）, the gear
Plate（19）Pass through top pressure spring（20）With cylinder（29）Side wall is connected, the curved roof（26）Lower end be provided with side and incline
Oblique inclined shore block（28）, two support columns positioned at the same side（2）Between be provided with helical axis（30）, helical axis（30）'s
One end and fixed motor（22）It is connected, the helical axis（30）On be provided with two sections of oppositely oriented spiral sections（21）, two sections
Spiral section（21）On be provided with movable sleeving with matching（23）, the movable sleeving（23）Lower end be fixedly connected with L
The fixed mount of type（24）, fixed mount（24）Close to shifting roller（3）Side be provided with fixed arch plate（25）.
2. town road according to claim 1 plays lid arrangement with road surface manhole, it is characterised in that the suspension rod（5）Top
End is provided with turning knob（6）.
3. town road according to claim 1 plays lid arrangement with road surface manhole, it is characterised in that the movable sleeving（23）
Upper end is provided with gag lever post（31）, gag lever post（31）Upper end and support transverse slat（1）It is slidably connected.
4. town road according to claim 1 plays lid arrangement with road surface manhole, it is characterised in that the fixed arch plate
（25）Inner side circular diameter and shifting roller（3）Outside circular diameter is identical.
5. town road according to claim 1 plays lid arrangement with road surface manhole, it is characterised in that the sliding equipment bag
Include and be arranged on circular boatswain chair（4）Support chute on lower surface（18）Be arranged on support chute（18）Interior support slipper
（17）, support slipper（17）Lower end and cylinder（29）Top is fixedly connected.
6. town road according to claim 1 plays lid arrangement with road surface manhole, it is characterised in that the transmission mechanism bag
Include and be arranged on lid motor（12）Drive sprocket on main shaft（13）Be arranged on screw axis（10）Driven sprocket on top
（15）, driven sprocket（15）And drive sprocket（13）Pass through chain（14）It is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710984828.9A CN107724432B (en) | 2017-10-20 | 2017-10-20 | A kind of town road road surface manhole lid arrangement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710984828.9A CN107724432B (en) | 2017-10-20 | 2017-10-20 | A kind of town road road surface manhole lid arrangement |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107724432A true CN107724432A (en) | 2018-02-23 |
| CN107724432B CN107724432B (en) | 2019-08-06 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710984828.9A Expired - Fee Related CN107724432B (en) | 2017-10-20 | 2017-10-20 | A kind of town road road surface manhole lid arrangement |
Country Status (1)
| Country | Link |
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| CN (1) | CN107724432B (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108529518A (en) * | 2018-05-02 | 2018-09-14 | 南京奥新可工程科技有限公司 | A kind of underground piping maintenance well lid lid arrangement |
| CN108821173A (en) * | 2018-06-27 | 2018-11-16 | 李�荣 | A kind of urban water conservancy pulls up device with discharge outlet cement grid |
| CN109437071A (en) * | 2018-10-17 | 2019-03-08 | 国网山东省电力公司潍坊供电公司 | Auxiliary device is used in a kind of unlatching of work well well lid |
| CN110357010A (en) * | 2019-06-21 | 2019-10-22 | 张曼玉 | A kind of municipal administration adjustable manhole lid device of operation |
| CN111056488A (en) * | 2020-01-14 | 2020-04-24 | 杭州艾勒维特传动机械有限公司 | Arrangement type lifting platform device |
| CN111320118A (en) * | 2018-10-30 | 2020-06-23 | 杨佳魏 | Method for controlling elevation starting during heavy equipment transportation |
| CN111704091A (en) * | 2020-06-24 | 2020-09-25 | 包景全 | Boats and ships sewage well lid hoisting device based on intelligent manufacturing |
| CN112479024A (en) * | 2020-10-27 | 2021-03-12 | 江苏旭松建设工程有限公司 | Equipment is changed to integral type town road well frame |
| CN112515825A (en) * | 2020-12-16 | 2021-03-19 | 中南大学湘雅二医院 | Hepatobiliary pancreas surgery is with 3D printing exempts from to sew up compatible support of courage intestines |
| CN112678748A (en) * | 2020-12-23 | 2021-04-20 | 何运鹏辉 | Size-adaptive sewer well lid lifting machine for municipal construction |
| CN112723271A (en) * | 2021-01-13 | 2021-04-30 | 江西建邦建设集团有限公司 | Auxiliary lifting device for sewer well cover |
| CN112960622A (en) * | 2021-02-19 | 2021-06-15 | 刘德江 | Well lid moves device for municipal administration |
| CN113148920A (en) * | 2021-04-27 | 2021-07-23 | 中交第四公路工程局有限公司 | Temporary manhole handling equipment for steel box girder |
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| GB191315236A (en) * | 1913-07-02 | 1914-07-02 | Thomas Borres | An Improved Appliance for Lifting Gully Grates and Manhole Lids. |
| US4789072A (en) * | 1987-04-20 | 1988-12-06 | Quam Dean R | Hydraulic manhole cover lifter |
| CN2138110Y (en) * | 1992-12-03 | 1993-07-14 | 张建军 | Manhole cover opener |
| CN204958332U (en) * | 2015-05-28 | 2016-01-13 | 青岛农业大学 | Manhole cover opener |
| CN205170330U (en) * | 2015-11-23 | 2016-04-20 | 滕州市市政工程管理处 | Fluid pressure type well lid opening device |
-
2017
- 2017-10-20 CN CN201710984828.9A patent/CN107724432B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB191315236A (en) * | 1913-07-02 | 1914-07-02 | Thomas Borres | An Improved Appliance for Lifting Gully Grates and Manhole Lids. |
| US4789072A (en) * | 1987-04-20 | 1988-12-06 | Quam Dean R | Hydraulic manhole cover lifter |
| CN2138110Y (en) * | 1992-12-03 | 1993-07-14 | 张建军 | Manhole cover opener |
| CN204958332U (en) * | 2015-05-28 | 2016-01-13 | 青岛农业大学 | Manhole cover opener |
| CN205170330U (en) * | 2015-11-23 | 2016-04-20 | 滕州市市政工程管理处 | Fluid pressure type well lid opening device |
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108529518A (en) * | 2018-05-02 | 2018-09-14 | 南京奥新可工程科技有限公司 | A kind of underground piping maintenance well lid lid arrangement |
| CN108821173A (en) * | 2018-06-27 | 2018-11-16 | 李�荣 | A kind of urban water conservancy pulls up device with discharge outlet cement grid |
| CN109437071A (en) * | 2018-10-17 | 2019-03-08 | 国网山东省电力公司潍坊供电公司 | Auxiliary device is used in a kind of unlatching of work well well lid |
| CN109437071B (en) * | 2018-10-17 | 2020-06-23 | 国网山东省电力公司潍坊供电公司 | Auxiliary device for opening working well lid |
| CN111320118A (en) * | 2018-10-30 | 2020-06-23 | 杨佳魏 | Method for controlling elevation starting during heavy equipment transportation |
| CN110357010A (en) * | 2019-06-21 | 2019-10-22 | 张曼玉 | A kind of municipal administration adjustable manhole lid device of operation |
| CN111056488A (en) * | 2020-01-14 | 2020-04-24 | 杭州艾勒维特传动机械有限公司 | Arrangement type lifting platform device |
| CN111704091B (en) * | 2020-06-24 | 2021-12-07 | 安徽中兴造船有限公司 | Boats and ships sewage well lid hoisting device based on intelligent manufacturing |
| CN111704091A (en) * | 2020-06-24 | 2020-09-25 | 包景全 | Boats and ships sewage well lid hoisting device based on intelligent manufacturing |
| CN112479024A (en) * | 2020-10-27 | 2021-03-12 | 江苏旭松建设工程有限公司 | Equipment is changed to integral type town road well frame |
| CN112479024B (en) * | 2020-10-27 | 2023-02-21 | 江苏旭松建设工程有限公司 | Equipment is changed to integral type town road well frame |
| CN112515825A (en) * | 2020-12-16 | 2021-03-19 | 中南大学湘雅二医院 | Hepatobiliary pancreas surgery is with 3D printing exempts from to sew up compatible support of courage intestines |
| CN112678748A (en) * | 2020-12-23 | 2021-04-20 | 何运鹏辉 | Size-adaptive sewer well lid lifting machine for municipal construction |
| CN112678748B (en) * | 2020-12-23 | 2023-01-20 | 无锡天工建设有限公司 | Size-adaptive sewer well lid lifting machine for municipal construction |
| CN112723271A (en) * | 2021-01-13 | 2021-04-30 | 江西建邦建设集团有限公司 | Auxiliary lifting device for sewer well cover |
| CN112723271B (en) * | 2021-01-13 | 2022-06-03 | 江西建邦建设集团有限公司 | Auxiliary lifting device for sewer well cover |
| CN112960622A (en) * | 2021-02-19 | 2021-06-15 | 刘德江 | Well lid moves device for municipal administration |
| CN113148920A (en) * | 2021-04-27 | 2021-07-23 | 中交第四公路工程局有限公司 | Temporary manhole handling equipment for steel box girder |
| CN113148920B (en) * | 2021-04-27 | 2022-07-22 | 中交第四公路工程局有限公司 | Temporary manhole handling equipment for steel box girder |
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|---|---|
| CN107724432B (en) | 2019-08-06 |
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