CN106044614A - Well cover plate lifting and dropping moving device based on hydraulic jacks - Google Patents
Well cover plate lifting and dropping moving device based on hydraulic jacks Download PDFInfo
- Publication number
- CN106044614A CN106044614A CN201610382775.9A CN201610382775A CN106044614A CN 106044614 A CN106044614 A CN 106044614A CN 201610382775 A CN201610382775 A CN 201610382775A CN 106044614 A CN106044614 A CN 106044614A
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- China
- Prior art keywords
- cap plate
- cover plate
- concrete tunnel
- plate
- hydraulic jack
- 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.)
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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
- B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
- B66F3/24—Devices, e.g. jacks, adapted for uninterrupted lifting of loads fluid-pressure operated
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/18—Appliances for use in repairing pipes
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Structural Engineering (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
A well cover plate lifting and dropping moving device based on hydraulic jacks comprises a concrete gallery poured on a soil pit, and cover plates are arranged on the concrete gallery. The moving device further comprises the hydraulic jacks, screw-hand wheel mechanisms, pulley mechanisms and sliding block mechanisms, wherein the hydraulic jacks and the screw-hand wheel mechanisms are used for lifting and dropping the cover plates, and the pulley mechanisms and the sliding block mechanisms are used for left-right sliding of the cover plates. The hydraulic jacks are fixedly mounted on the left sections of the two inner walls in the length direction of the concrete gallery, and external driving mechanisms are connected with the hydraulic jacks. The screw-hand wheel mechanisms are arranged at the right end of the concrete gallery. Each pulley mechanism comprises a rail and a pulley assembly. The rails are mounted on the two inner walls in the length direction of the concrete gallery. The well cover plate lifting and dropping moving device based on the hydraulic jacks is convenient to overhaul, low in cost and high in work efficiency.
Description
Technical field
The present invention relates to a kind of manhole cover plate lifting based on hydraulic jack and decline mobile device.
Background technology
Society, pipe transmission system, as a kind of load mode, is just playing the most important effect, and it is made a living
Producing lives carries various air-liquid fluid fuels and productive life water, is provided with joint and the valve of many in pipe transmission system
Door, after using a period of time, often there is such or such problem in joint and valve, and maintenance and replacing are required for every time
The earth (being concrete road surface sometimes) on earth's surface is removed, the most just can carry out the work being correlated with, be under road surface, traffic main artery
Pipeline maintenance, it is necessary to road closure construction, this method not only inefficiency, and top layer to be destroyed vegetation or coagulation
Soil surface, does not meets the theory of sustainable development.
Summary of the invention
For the deficiency that the maintenance overcoming existing cover plate to exist is inconvenient, relatively costly, the invention provides one and be easy to
Maintenance, the manhole cover plate lifting based on hydraulic jack that cost is relatively low, work efficiency is higher and decline mobile device.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of manhole cover plate lifting based on hydraulic jack and decline mobile device, including the coagulation being cast on earth hole
Heatable adobe sleeping platform road, described concrete tunnel is provided with cover plate, described mobile device also include in order to cover plate lifting hydraulic jack and
Leading screw handwheel and in order to the pulley mechanism slided about cover plate and slide block mechanism, described concrete tunnel is at length direction
Left section of two inwalls be installed with described hydraulic jack, external drive mechanism is connected with described hydraulic jack, described
Leading screw handwheel is arranged on the right-hand member in described concrete tunnel；
Described cover plate includes that cover plate block, described cover plate block include end cover plate, left cap plate, right cap plate, institute
State end cover plate include being positioned at the left end cap plate of the left end of concrete tunnel length direction and be positioned at concrete tunnel length
The right end cap plate of the right-hand member in direction, described left cap plate between described right cap plate and described left end cap plate,
Described right cap plate between described left cap plate and described right end cap plate, described left cap plate and right side cover plate
Block is provided with two or more, and the lower section of each left cap plate is equipped with two hydraulic jack, plural left cap
The length of the plate left end from concrete tunnel increases successively to middle part；
Described pulley mechanism includes track and pulley assembly, and described concrete tunnel is equal on two inwalls of length direction
Being provided with described track, on the inwall of the same side, concrete tunnel, it is mixed with described that described track is positioned at described hydraulic jack
Between the inwall in solidifying heatable adobe sleeping platform road, formed to accommodate the right side between right-hand member and the right-hand member inwall in described concrete tunnel of described track
The right accommodation space of end cap plate；Described pulley assembly includes wheel support and pulley, the end at the two ends of described left cap plate
Portion is respectively equipped with described wheel support, and the upper end of described wheel support is collapsible with described left cap plate to be connected, described wheel
The lower end supported is provided with described pulley, and described pulley forms sliding pair with described track, and the left and right of described left cap plate is slided
Direction is identical with the length direction in described concrete tunnel；
Described left cap plate increases successively from left end to middle part, the length of wheel support thereon, in concrete tunnel
The number that the inwall of the same side gets on the right track is identical with the number of left cap plate, described pulley and track one_to_one corresponding, adjacent rail
It is arranged in parallel between road；
Described leading screw handwheel includes that handwheel and screw mechanism, described screw mechanism include leading screw, the spiral shell being vertically arranged
Elevating lever that is female and that lift in order to end cover plate, described handwheel is fixed on the upper end of described leading screw, and described leading screw is vertically arranged,
The lower end of described leading screw is installed in rotation on the outer wall in described concrete tunnel, and described nut sleeve is contained on described leading screw,
Described elevating lever is horizontally disposed, and one end of described elevating lever is fixing with described nut to be connected, and described concrete tunnel has use
The fluting moved up and down with elevating lever, the other end of described elevating lever is positioned at the end of described right end cap plate through described fluting
Portion；
Described slide block mechanism includes slide block, and before and after described right cap plate, the bottom at two ends is equipped with described slide block, institute
State slide block and move left and right pair with the formation of described track.
Further, the number of described left cap plate is identical with the number of described right cap plate.
Further, the bottom at the two ends of each left cap plate is respectively equipped with two pulley assemblies, with two of one end
The pulley of pulley assembly forms sliding pair with same track.
Further, described concrete tunnel is respectively equipped with erecting bed, described hydraulic pressure on two inwalls of length direction
Jack is fixed on described erecting bed on the side away from concrete tunnel inwall；Described track installation exists at described erecting bed
On the side of concrete tunnel inwall.
Further, each left cap plate be respectively arranged at two ends with top cover lath, described top cover lath is positioned at institute
Stating on track, before and after described top cover lath, length subtracts successively from the left cap plate of the left cap plate of left end to right-hand member
Little, before and after each left cap plate, length is identical plus the total length of length before and after respective tops cover plate bar, each cover plate
The height of bar is identical with the height of each left cap plate.
Further, before and after described concrete tunnel right-hand member, both sides are equipped with described leading screw handwheel, two leading screws
Handwheel is arranged symmetrically with.
Further, the number of described cover plate block is that 12, wherein left cap plate and right cap plate are respectively five
Individual, left end cap plate and right end cap plate are one.
What the present invention mainly showed has the beneficial effect that by hydraulic jack and leading screw handwheel, can be by tiling
Cover plate stacks, and revolutionizes the traditional maintenance mode every time carrying out destroying surface vegetation or road surface during tubular service, greatly
Improve greatly maintenance efficiency, improve land utilization ratio, reduce maintenance cost.
Accompanying drawing explanation
Fig. 1 is the structural representation that the right cap plate of the present invention is stacked up.
Fig. 2 is the structural representation of the left cap plate of the present invention.
Fig. 3 is the bottom surface structure schematic diagram of the right cap plate of the present invention.
Fig. 4 is the structural representation that the cover plate block of the present invention is all stacked up.
Fig. 5 is the structural representation of leading screw handwheel.
Detailed description of the invention
The invention will be further described below in conjunction with the accompanying drawings.
With reference to Fig. 1～Fig. 5, a kind of manhole cover plate lifting based on hydraulic jack and decline mobile device, including being cast in
Concrete tunnel 7 on earth hole 5, described concrete tunnel 7 is provided with cover plate 3, and described mobile device also includes in order to cover plate 3
The hydraulic jack 2 of lifting and leading screw handwheel and the pulley mechanism slided in order to cover plate about 3 and slide block mechanism, described
Concrete tunnel 7 is installed with described hydraulic jack 2, external drive mechanism and institute at left section of two inwalls of length direction
Stating hydraulic jack 2 to connect, described leading screw handwheel is arranged on the right-hand member in described concrete tunnel 7；
Described cover plate 3 includes that cover plate block, described cover plate block include end cover plate, left cap plate, right cap plate, institute
State end cover plate include being positioned at the left end cap plate of the left end of concrete tunnel 7 length direction and be positioned at concrete tunnel 7 length
The right end cap plate of right-hand member in degree direction, described left cap plate be positioned at described right cap plate and described left end cap plate it
Between, described right cap plate between described left cap plate and described right end cap plate, described left cap plate and right side
Cover plate block is provided with two or more, and the lower section of each left cap plate is equipped with two hydraulic jack, a plural left side
The length of the side cover plate left end from concrete tunnel increases successively to middle part；
Described pulley mechanism includes track 8 and pulley assembly, and described concrete tunnel 7 is on two inwalls of length direction
Being mounted on described track 8, on the inwall of the same side, concrete tunnel 7, described track is positioned at described hydraulic jack 2 and institute
State between the inwall in concrete tunnel 7, formed between right-hand member and the right-hand member inwall in described concrete tunnel 7 of described track 8 and use
To accommodate the right accommodation space of right end cap plate；Described pulley assembly includes wheel support 6 and pulley, described left cap plate
The bottom at two ends is respectively equipped with described wheel support 6, the upper end of described wheel support 6 and the described collapsible company of left cap plate
Connecing, the lower end of described wheel support 6 is provided with described pulley, and described pulley and described track 8 form sliding pair, described left side cover plate
The left and right line of travel of block is identical with the length direction in described concrete tunnel 7；
Described left cap plate increases successively from left end to middle part, the length of wheel support thereon, in concrete tunnel
The number that the inwall of the same side gets on the right track is identical with the number of left cap plate, described pulley and track one_to_one corresponding, adjacent rail
It is arranged in parallel between road；
Described leading screw handwheel includes handwheel 11 and screw mechanism 1, and described screw mechanism 1 includes the leading screw being vertically arranged
13, nut and the elevating lever 12 in order to the lifting of end cover plate, described handwheel 11 is fixed on the upper end of described leading screw 13, described silk
Thick stick 13 is vertically arranged, the lower end of described leading screw 13 is installed in rotation on the outer wall in described concrete tunnel 7, described nut sleeve
Being contained on described leading screw 13, described elevating lever 12 is horizontally disposed, and one end of described elevating lever 12 is fixing with described nut to be connected, institute
State and on concrete tunnel 7, have the fluting moved up and down in order to elevating lever 12, the other end of described elevating lever 12 pass described in open
Groove is positioned at the bottom of described right end cap plate；
Described slide block mechanism includes slide block 9, and before and after described right cap plate, the bottom at two ends is equipped with described slide block 9,
Described slide block 9 is formed with described track 8 and moves left and right pair.
Further, the number of described left cap plate is identical with the number of described right cap plate.
Further, the bottom at the two ends of each left cap plate is respectively equipped with two pulley assemblies, with two of one end
The pulley of pulley assembly forms sliding pair with same track.
Further, described concrete tunnel 7 is respectively equipped with erecting bed, described hydraulic pressure on two inwalls of length direction
Jack 2 is fixed on described erecting bed on the side away from concrete tunnel 7 inwall；Described track installation is at described erecting bed
On the side near concrete tunnel 7 inwall.
Further, each left cap plate be respectively arranged at two ends with top cover lath 4, described top cover lath 4 is positioned at
On described track, before and after described top cover lath 4, length is from the left cap plate of the left cap plate of left end to right-hand member successively
Reducing, before and after each left cap plate, length is identical plus the total length of length before and after respective tops cover plate bar, each lid
The height of lath is identical with the height of each left cap plate.
Further, before and after described concrete tunnel 7 right-hand member, both sides are equipped with described leading screw handwheel, two leading screws
Handwheel is arranged symmetrically with.
Further, the number of described cover plate block is that 12, wherein left cap plate and right cap plate are respectively five
Individual, left end cap plate and right end cap plate are one.
In the present embodiment, being equipped with various pipeline in concrete tunnel 7, cover plate 3 is planted above has vegetation or block to have Colophonium；At lid
When plate 3 tiles, wheel support 4 is folded in the bottom of left cap plate；Top cover lath 4 is placed on the two ends of left cap plate,
Its bottom surface contacts with track.
As shown in Figure 4, described track 8 is arranged on concrete tunnel 7 on two inwalls of length direction, concrete tunnel
Orbital Symmetry on two inwalls of 7 is arranged, the two ends of described left cap plate lay respectively in corresponding hydraulic jack 2, often
The corresponding corresponding track of the pulley at individual left cap plate two ends；Described hydraulic jack 2 is adjacent with track 3；
As it is shown in figure 5, the other end of described elevating lever 12 is connected with lifting supporting plate, described lifting supporting plate is positioned at described right-hand member
The bottom of cover plate block；The other end of described elevating lever 12 can the company of fixing through the bottom of described fluting with described right end cap plate
Connect, it is possible to do not fix；The lower end of described leading screw 13 is arranged on the outer wall in concrete tunnel 7 by base 14 and rolling bearing,
Rolling bearing is arranged in base 14, the lower end of leading screw 13 and rolling bearing interference fit.By manual rotation's handwheel 11, handle
Screw mechanism 1 makes down or up one layer of right end cap plate, and the height of a layer is the height of a cover plate block, then moves adjacent
Right cap plate to moving to initial position on right end cap plate or by right cap plate, be rotated further by handwheel 11 and be allowed to decline
Or rising one layer, right cap plate the most just can quickly be opened or close by so operation.
The work process of the present invention is:
In whole device, the initial condition of left part is that cover plate 3 is laid on concrete tunnel, when needs overhaul coagulation
During pipeline in heatable adobe sleeping platform road 7, first being taken out by both sides top cover lath 4, external drive mechanism is very heavy by hydraulic strip hydrodynamic pressure
Top 2, so that hydraulic jack 2 rises, by left cap plate jack-up, now props up being folded in the wheel bottom left cap plate
Support 6 struts so that the pulley of its end matches with track, shifts left cap plate onto concrete tunnel by the way of artificial
The left end of 7 stacks (stacking to the left from centre), owing to the length of wheel support 6 lengthens successively from two ends so that cover plate 3
Can fold from level to level, after maintenance, shift left cap plate onto corresponding initial position, make hydraulic jack 2 rise, so
After wheel support 6 is folded into cover plate 3 back side, fall hydraulic jack 2, finally top cover lath 4 laid.
In whole device, the initial condition of right part is that cover plate 3 is laid on concrete tunnel 7, when needs overhaul coagulation
During pipeline in heatable adobe sleeping platform road 7, first pass through manual rotation's handwheel and make screw mechanism 1 decline, particularly rotate handwheel 11 and drive
Right cap plate, so that elevating lever 12 declines, is sunk in right accommodation space by leading screw 13, then by manpower by right cap
Plate is shifted the right-hand member in concrete tunnel 7 onto and is stacked (stacking to the right from centre) so that right cap plate can stack from level to level, this
Cover plate 3 just can quickly be opened by sample；After maintenance, screw mechanism is made to increase by manual rotation's handwheel, respectively by the right side
Side cover plate shifts corresponding initial position onto, and right cap plate several times, just can all be laid, thus can by repetitive operation
Quick-make cover plate.
The present invention considers surface vegetation (or concrete road surface) is fabricated to cover plate block one by one, is laid in the upper of pipeline
Side, when need repairing pipeline time, just easily one piece of block cover plate can be folded up by the present invention, after maintenance, then put down
Bedding is good, recovers surface vegetation or concrete road surface, and the whole work process used time is greatly shortened, and greatly reduces and keep in repair into
This, be a kind of sustainable development, and application prospect is huge.
Claims (7)
1. manhole cover plate lifting based on hydraulic jack and a decline mobile device, including the concrete being cast on earth hole
Tunnel, described concrete tunnel is provided with cover plate, it is characterised in that: described mobile device also includes the hydraulic pressure in order to cover plate lifting
Jack and leading screw handwheel and in order to the pulley mechanism slided about cover plate and slide block mechanism, described concrete tunnel exists
Left section of two inwalls of length direction are installed with described hydraulic jack, and external drive mechanism is with described hydraulic jack even
Connecing, described leading screw handwheel is arranged on the right-hand member in described concrete tunnel；
Described cover plate includes that cover plate block, described cover plate block include end cover plate, left cap plate, right cap plate, described end
Portion's cover plate block includes the left end cap plate being positioned at the left end of concrete tunnel length direction and is positioned at concrete tunnel length direction
The right end cap plate of right-hand member, described left cap plate is between described right cap plate and described left end cap plate, described
Right cap plate is between described left cap plate and described right end cap plate, and described left cap plate and right cap plate are equal
Being provided with two or more, the lower section of each left cap plate is equipped with two hydraulic jack, plural left cap plate
The length left end from concrete tunnel increase successively to middle part；
Described pulley mechanism includes that track and pulley assembly, described concrete tunnel are respectively mounted on two inwalls of length direction
Having described track, on the inwall of the same side, concrete tunnel, described track is positioned at described hydraulic jack and described concrete
Between the inwall in tunnel, formed to accommodate right end cap between right-hand member and the right-hand member inwall in described concrete tunnel of described track
The right accommodation space of plate；Described pulley assembly includes that wheel support and pulley, the bottom at the two ends of described left cap plate divide
Not being provided with described wheel support, the upper end of described wheel support is collapsible with described left cap plate to be connected, described wheel support
Lower end be provided with described pulley, described pulley forms sliding pair, the left and right line of travel of described left cap plate with described track
Identical with the length direction in described concrete tunnel；
Described left cap plate increases successively from left end to middle part, the length of wheel support thereon, same in concrete tunnel
The number that the inwall of side gets on the right track is identical with the number of left cap plate, described pulley and track one_to_one corresponding, adjacent orbit it
Between be arranged in parallel；
Described leading screw handwheel include leading screw that handwheel and screw mechanism, described screw mechanism include being vertically arranged, nut and
In order to the elevating lever of end cover plate lifting, described handwheel is fixed on the upper end of described leading screw, and described leading screw is vertically arranged, described
The lower end of leading screw is installed in rotation on the outer wall in described concrete tunnel, and described nut sleeve is contained on described leading screw, described
Elevating lever is horizontally disposed, and one end of described elevating lever is fixing with described nut to be connected, and described concrete tunnel has to rise
The fluting that fall bar moves up and down, the other end of described elevating lever is positioned at the bottom of described right end cap plate through described fluting；
Described slide block mechanism includes slide block, and before and after described right cap plate, the bottom at two ends is equipped with described slide block, described cunning
Block is formed with described track and moves left and right pair.
A kind of manhole cover plate lifting based on hydraulic jack and decline mobile device, its feature exists
In: the number of described left cap plate is identical with the number of described right cap plate.
A kind of manhole cover plate lifting based on hydraulic jack and decline mobile device, its feature
It is: the bottom at the two ends of each left cap plate is respectively equipped with two pulley assemblies, with the cunning of two pulley assemblies of one end
Wheel forms sliding pair with same track.
A kind of manhole cover plate lifting based on hydraulic jack and decline mobile device, its feature
It is: described concrete tunnel is respectively equipped with erecting bed on two inwalls of length direction, and described hydraulic jack is fixed on
Described erecting bed is on the side away from concrete tunnel inwall；Described track installation at described erecting bed near coagulation heatable adobe sleeping platform
On the side of road inwall.
A kind of manhole cover plate lifting based on hydraulic jack and decline mobile device, its feature
Be: each left cap plate be respectively arranged at two ends with top cover lath, described top cover lath is positioned on described track, described
Before and after top cover lath, length is sequentially reduced from the left cap plate of the left cap plate of left end to right-hand member, each left side cover plate
Before and after block, length is identical plus the total length of length before and after respective tops cover plate bar, the height of each cover plate bar and each left side
The height of side cover plate is identical.
A kind of manhole cover plate lifting based on hydraulic jack and decline mobile device, its feature
It is: before and after described concrete tunnel right-hand member, both sides are equipped with described leading screw handwheel, and two leading screw handwheels are symmetrical
Arrange.
A kind of manhole cover plate lifting based on hydraulic jack and decline mobile device, its feature
It is: the number of described cover plate block is that 12, wherein left cap plate and right cap plate are respectively five, left end cap plate
It is one with right end cap plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610382775.9A CN106044614B (en) | 2016-06-01 | 2016-06-01 | A kind of manhole cover plate lifting and decline mobile device based on hydraulic jack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610382775.9A CN106044614B (en) | 2016-06-01 | 2016-06-01 | A kind of manhole cover plate lifting and decline mobile device based on hydraulic jack |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106044614A true CN106044614A (en) | 2016-10-26 |
| CN106044614B CN106044614B (en) | 2018-06-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610382775.9A Active CN106044614B (en) | 2016-06-01 | 2016-06-01 | A kind of manhole cover plate lifting and decline mobile device based on hydraulic jack |
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| CN (1) | CN106044614B (en) |
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| CN2401596Y (en) * | 2000-01-03 | 2000-10-18 | 曹宇 | Lifting/lowering type cover for manhole |
| CN102701111A (en) * | 2012-06-13 | 2012-10-03 | 青岛四方车辆研究所有限公司 | Segmental turning cover plate device for foundation pit type car lifter |
| CN102943923A (en) * | 2012-11-21 | 2013-02-27 | 浙江大学 | Anti-floating box culvert structure for pipelines in soft soil |
| CN104085655A (en) * | 2014-06-30 | 2014-10-08 | 成都飞机工业（集团）有限责任公司 | Self-covering guide rail device and transporter formed by self-covering guide rail device |
| CN204385766U (en) * | 2014-11-06 | 2015-06-10 | 潘正云 | The safe barrier covering plate structure of existing road piping shaft |
| CN205740150U (en) * | 2016-06-01 | 2016-11-30 | 浙江工业大学义乌科学技术研究院有限公司 | A kind of manhole cover plate lifting based on hydraulic jack and decline mobile device |
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2016
- 2016-06-01 CN CN201610382775.9A patent/CN106044614B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2401596Y (en) * | 2000-01-03 | 2000-10-18 | 曹宇 | Lifting/lowering type cover for manhole |
| CN102701111A (en) * | 2012-06-13 | 2012-10-03 | 青岛四方车辆研究所有限公司 | Segmental turning cover plate device for foundation pit type car lifter |
| CN102943923A (en) * | 2012-11-21 | 2013-02-27 | 浙江大学 | Anti-floating box culvert structure for pipelines in soft soil |
| CN104085655A (en) * | 2014-06-30 | 2014-10-08 | 成都飞机工业（集团）有限责任公司 | Self-covering guide rail device and transporter formed by self-covering guide rail device |
| CN204385766U (en) * | 2014-11-06 | 2015-06-10 | 潘正云 | The safe barrier covering plate structure of existing road piping shaft |
| CN205740150U (en) * | 2016-06-01 | 2016-11-30 | 浙江工业大学义乌科学技术研究院有限公司 | A kind of manhole cover plate lifting based on hydraulic jack and decline mobile device |
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|---|---|
| CN106044614B (en) | 2018-06-12 |
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