CN112854899A - Municipal works foundation ditch safety device - Google Patents
Municipal works foundation ditch safety device Download PDFInfo
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- CN112854899A CN112854899A CN202110042405.1A CN202110042405A CN112854899A CN 112854899 A CN112854899 A CN 112854899A CN 202110042405 A CN202110042405 A CN 202110042405A CN 112854899 A CN112854899 A CN 112854899A
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- power supply
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- 230000001681 protective effect Effects 0.000 claims description 12
- 238000001514 detection method Methods 0.000 claims description 7
- 238000005286 illumination Methods 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims description 3
- 230000004313 glare Effects 0.000 claims 2
- 230000004888 barrier function Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 230000007704 transition Effects 0.000 abstract description 2
- 238000009412 basement excavation Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 230000001012 protector Effects 0.000 description 3
- 230000005611 electricity Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004590 computer program Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H17/00—Fencing, e.g. fences, enclosures, corrals
- E04H17/14—Fences constructed of rigid elements, e.g. with additional wire fillings or with posts
- E04H17/16—Fences constructed of rigid elements, e.g. with additional wire fillings or with posts using prefabricated panel-like elements, e.g. wired frames
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F15/00—Safety arrangements for slowing, redirecting or stopping errant vehicles, e.g. guard posts or bollards; Arrangements for reducing damage to roadside structures due to vehicular impact
- E01F15/14—Safety arrangements for slowing, redirecting or stopping errant vehicles, e.g. guard posts or bollards; Arrangements for reducing damage to roadside structures due to vehicular impact specially adapted for local protection, e.g. for bridge piers, for traffic islands
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F9/00—Arrangement of road signs or traffic signals; Arrangements for enforcing caution
- E01F9/60—Upright bodies, e.g. marker posts or bollards; Supports for road signs
- E01F9/604—Upright bodies, e.g. marker posts or bollards; Supports for road signs specially adapted for particular signalling purposes, e.g. for indicating curves, road works or pedestrian crossings
- E01F9/608—Upright bodies, e.g. marker posts or bollards; Supports for road signs specially adapted for particular signalling purposes, e.g. for indicating curves, road works or pedestrian crossings for guiding, warning or controlling traffic, e.g. delineator posts or milestones
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F9/00—Arrangement of road signs or traffic signals; Arrangements for enforcing caution
- E01F9/60—Upright bodies, e.g. marker posts or bollards; Supports for road signs
- E01F9/658—Upright bodies, e.g. marker posts or bollards; Supports for road signs characterised by means for fixing
- E01F9/669—Upright bodies, e.g. marker posts or bollards; Supports for road signs characterised by means for fixing for fastening to safety barriers or the like
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S20/00—Supporting structures for PV modules
- H02S20/30—Supporting structures being movable or adjustable, e.g. for angle adjustment
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S20/00—Supporting structures for PV modules
- H02S20/30—Supporting structures being movable or adjustable, e.g. for angle adjustment
- H02S20/32—Supporting structures being movable or adjustable, e.g. for angle adjustment specially adapted for solar tracking
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Photovoltaic Devices (AREA)
Abstract
The invention discloses a municipal engineering foundation pit safety protection device which is characterized by comprising a lower supporting module, a middle protection module and an upper cover plate module, wherein the lower supporting module comprises a plurality of supporting bases connected end to end and lifting moving pieces arranged in each supporting base; the middle protection module comprises protection support columns positioned on two sides and a plurality of protection plates arranged between the two protection support columns; the upper portion apron module includes with the protection pillar with outside guard plate top first top cap relative and with inboard guard plate top relative second top cap, solve the current problem that is unfavorable for safety barrier's the removal of piling up and the problem of transition notes guardrail transport and pile up the removal and neglected the firm effect that guardrail itself needs.
Description
Technical Field
The invention relates to the technical field of municipal engineering foundation pits, in particular to a municipal engineering foundation pit safety protection device.
Background
The municipal road foundation pit protection engineering refers to municipal road engineering with excavation depth exceeding 5m (including 5m), the excavation depth exceeding 5m, the geological conditions and the surrounding environment are complex, the excavation depth exceeds the underground water level, and the like, in the municipal road foundation pit protection engineering, protective guards are generally required to be arranged near the foundation pit, after the engineering is completed, the safety protective guards are generally required to be removed, as temporary facilities are only adopted, a technical scheme specially aiming at the foundation pit protective guards is not arranged, a construction unit only simply adds some protective measures, construction safety is affected, and when the protective guards are removed, the protective guards are not easy to be recycled and put into use again, so that resource waste is caused, and the construction cost is increased.
In the prior art, the invention discloses a municipal road foundation pit safety protection device (patent number ZL201711332443.0), which comprises a fixed support, wherein the inner side of the fixed support is fixedly connected with a protection frame, a rotary connecting shaft is arranged between the protection frames, two sides of the rotary connecting shaft are respectively and rotatably connected with a first rotary installer and a second rotary installer, one sides of the first rotary installer and the second rotary installer, which are far away from the rotary connecting shaft, are fixedly connected with the protection frame, the top of the protection frame is fixedly connected with a switching top plate, two sides of the top of the switching top plate are fixedly connected with fixing devices, the top of the fixing devices is fixedly connected with a rotary motor frame, and the bottom of the outer wall of the rotary motor frame is fixedly connected with a fixed bottom rod. The warning device is convenient for warning vehicles and pedestrians, does not need redundant cables, and is suitable for more working environments.
Foretell foundation ditch safety device aims at changing current safety barrier and can set up the column base of perpendicular to guardrail body for the fixed steadiness of guardrail, and shared area when setting up the increase guardrail transport of column base is unfavorable for safety barrier's the problem of piling up the removal, but this kind of protector transition is noted the guardrail transport and is piled up the problem of removal, has ignored the firm effect that guardrail itself needs, and this application provides a municipal works foundation ditch safety device now.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a municipal engineering foundation pit safety protection device.
The technical purpose of the invention is realized by the following technical scheme:
a municipal engineering foundation pit safety protection device comprises a lower supporting module, a middle protecting module and an upper cover plate module, wherein the lower supporting module comprises a plurality of supporting bases connected end to end and lifting moving pieces arranged in each supporting base, the middle protecting module comprises protecting support columns positioned on two sides and a plurality of protecting plates arranged between the two protecting support columns, and the bottom ends of the protecting support columns are connected with the supporting bases; the protection plate is characterized in that the two adjacent protection plates are connected in a rotating mode in the horizontal direction through a plurality of connecting hinges arranged from top to bottom, the connecting hinges are located on the front side face and the rear side face of each protection plate, the protection plates are not located on the same side with hinges connected with the adjacent protection plates on the left side and the right side in a rotating mode, a plurality of limiting rods are arranged on the end portions of the two sides of each protection plate and inserted into the adjacent protection plates, a first driving piece used for driving the limiting rods to stretch is arranged in each protection plate, a power supply connected with the first driving piece is arranged in each protection plate, the power supply is electrically connected with a first charging plug arranged at the end portion of each limiting rod, and the first charging plug is; the power supply is electrically connected with a controller for controlling the first driving piece; the protection plate is provided with a detection piece for detecting the inclination condition of the protection plate, the front side of the protection plate is provided with a warning area, an elastic protective guard and a verticality display screen, and the detection piece is electrically connected with the verticality display screen and the controller;
the upper cover plate module comprises a first top cover opposite to the top ends of the protection support columns and the outermost side protection plates and a second top cover opposite to the top ends of the inner side protection plates, second mounting grooves used for inserting the protection support columns and the protection plates are formed in the bottom ends of the first top cover and the second top cover, first openings opposite to the protection support columns are formed in the top ends of the protection support columns, threads are arranged in the first openings, first connecting rods and second driving pieces in threaded connection with the first openings are arranged on the first top cover, second openings are formed in the top ends of the protection plates, second charging plugs and second connecting rods inserted into the second openings are arranged at the bottom ends of the first top cover and the second top cover respectively, and the second charging plugs are inserted into the second openings to be connected with power supplies in the corresponding protection plates; the top of first top cap rotates through the third driving piece and is provided with the rotor plate, and the top slope of rotor plate is provided with solar cell panel, is provided with the stand-by power supply who links to each other with solar cell panel and second charging plug in the rotor plate, stand-by power supply has the second driving piece to link to each other.
Further preferably, a first mounting groove has been seted up on the top of support base, the protection pillar bottom is provided with the first fixed plate that extends to the protection pillar bottom outside, and first fixed plate passes through bolt fixed mounting in first mounting groove, and the upper portion of first mounting groove slides and is provided with the sunshade that is used for hiding first mounting groove.
More preferably, the top end of the support base is provided with a slope inclined upwards towards the center of the first mounting groove, the shielding plate is arranged on the slope in a sliding manner along the inclined direction of the slope, and the lower part of the protection strut is provided with a fitting groove matched with the end part of the shielding plate.
Preferably, the bottom end of the supporting base is provided with a lifting channel, and the lifting moving member comprises a moving pulley which slides up and down on the lifting channel and a lifting structure which is used for driving the moving pulley to extend out or hide.
Preferably, four edges of the solar cell panel are provided with strong light detectors for detecting the illumination intensity, the strong light detectors are electrically connected with angle adjusting chips, and the angle adjusting chips are electrically connected with the third driving piece and the standby power supply.
In summary, compared with the prior art, the beneficial effects of the invention are as follows: by arranging the lower supporting module, the middle protecting module and the upper cover plate module, the assembly, the replacement and the transportation are very convenient; the movable pulley and the lifting structure are arranged aiming at the lower supporting module, the movable pulley can be conveniently arranged to move the whole protection device, the lifting structure can enable the movable pulley to be contracted into the supporting base, and the supporting base can achieve a good stabilizing effect; to protection pillar and guard plate in the middle part protection module, can accomplish the guard action of middle part position, and the guard plate can be folded and contracted and change, the elasticity rail guard of guard plate upper portion installation can effectively be crashproof, post the warning subsides on the warning district of below, and still be equipped with the detection piece and carry out the straightness that hangs down of guard plate and detect, can effectively monitor whether slope or damage of guard plate, whether or not whole protector inclines the circumstances such as, and solar cell panel's setting can be supplied power to whole protector, and can carry out the angle modulation according to the illumination condition.
Drawings
The above and other objects, features and advantages of exemplary embodiments of the present invention will become readily apparent from the following detailed description read in conjunction with the accompanying drawings. Several embodiments of the invention are illustrated by way of example, and not by way of limitation, in the figures of the accompanying drawings and in which:
FIG. 1 is a schematic structural diagram of an embodiment;
fig. 2 is a sectional view of a portion of fig. 1 according to an embodiment.
Reference numerals: 1. a lower support module; 2. a middle protection module; 3. an upper cover plate module; 4. a support base; 5. a lifting channel; 6. a movable pulley; 7. a lifting structure; 8. a protective pillar; 9. a protection plate; 10. a first mounting groove; 11. a first fixing plate; 12. a fitting groove; 13. connecting a hinge; 14. a limiting rod; 15. a first driving member; 16. a power supply; 17. a first socket; 18. a warning area; 19. an elastic guard rail; 20. a verticality display screen; 21. a first top cover; 22. a second top cover; 23. a second mounting groove; 24. a first opening; 25. a first connecting rod; 26. a second driving member; 27. a second opening; 28. a second socket; 29. a third driving member; 30. a rotating plate; 31. a solar panel; 32. a backup power source.
Detailed Description
The principles and spirit of the present invention will be described with reference to a number of exemplary embodiments. It is understood that these embodiments are given solely for the purpose of enabling those skilled in the art to better understand and to practice the invention, and are not intended to limit the scope of the invention in any way. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. Reference in the specification to "an embodiment" or "an implementation" may mean either one embodiment or one implementation or some instances of embodiments or implementations.
As will be appreciated by one skilled in the art, embodiments of the present invention may be embodied as a system, apparatus, device, method, or computer program product. Accordingly, the present disclosure may be embodied in the form of: entirely hardware, entirely software (including firmware, resident software, micro-code, etc.), or a combination of hardware and software.
According to the embodiment of the invention, the invention provides a municipal engineering foundation pit safety protection device.
It is to be noted that any number of elements in the figures are provided by way of example and not limitation, and any nomenclature is used for distinction only and not in any limiting sense.
A municipal engineering foundation pit safety protection device is shown by referring to fig. 1 and fig. 2 and comprises a lower supporting module 1, a middle protecting module 2 and an upper cover plate module 3, wherein the lower supporting module 1 comprises a plurality of supporting bases 4 which are connected end to end and lifting moving members which are arranged in each supporting base 4, the middle protecting module 2 comprises protecting pillars 8 which are positioned at two sides and a plurality of protecting plates 9 which are arranged between the two protecting pillars 8, the adjacent protecting pillars 8 are rotatably connected through rotating shafts to adapt to the protection of different terrains, and the bottom ends of the protecting pillars 8 are connected with the supporting bases 4; the bottom of the supporting base 4 is provided with a lifting channel 5, and the lifting moving member comprises a moving pulley 6 which slides up and down on the lifting channel 5 and a lifting structure 7 which is used for driving the moving pulley 6 to extend out or hide.
The top end of the supporting base 4 is provided with a first mounting groove 10, the bottom end of the protective pillar 8 is provided with a first fixing plate 11 extending to the outer side of the bottom end of the protective pillar 8, the first fixing plate 11 is fixedly mounted in the first mounting groove 10 through a bolt, and the upper part of the first mounting groove 10 is slidably provided with a shielding plate for covering the first mounting groove 10; specifically, the top end of the support base 4 is provided with a slope inclined upwards towards the center of the first installation groove 10, the shielding plate is arranged on the slope in a sliding manner along the inclined direction of the slope, and the lower part of the protection strut 8 is provided with a fitting groove 12 matched with the end part of the shielding plate.
Two adjacent protection plates 9 are connected in a rotating way in the horizontal direction through a plurality of connecting hinges 13 arranged from top to bottom, the connecting hinges 13 are positioned on the front side surface and the rear side surface of the protection plate 9, the protection plate 9 and the hinges which are rotatably connected with the adjacent protection plates 9 on the left side and the right side are not positioned on the same side, namely, a plurality of limiting rods 14 are arranged on the end parts of the two sides of the protection plate 9 and are inserted into the adjacent protection plate 9, a first driving piece 15 for driving the limiting rod 14 to stretch and retract is arranged in the protection plate 9, a power supply 16 connected with the first driving piece 15 is arranged in the protection plate 9, the power supply 16 is electrically connected with a first charging plug arranged at the end part of the limiting rod 14, and the first charging plug is inserted into the adjacent protection plate 9 through the limiting rod 14 to be electrically connected with the power supply 16 in the adjacent protection plate 9; the power supply 16 is electrically connected with a controller for controlling the first driving member 15; the protection plate 9 is provided with a detection piece for detecting the inclination condition of the protection plate 9, the front side of the protection plate 9 is provided with a warning area 18, an elastic protective guard 19 and a verticality display screen 20, and the detection piece is electrically connected with the verticality display screen 20 and the controller;
the upper cover plate module 3 comprises a first top cover 21 opposite to the top ends of the protection pillars 8 and the outermost protection plates 9, and a second top cover 22 opposite to the top end of the inner protection plates 9, wherein the bottom ends of the first top cover 21 and the second top cover 22 are provided with second mounting grooves 23 for inserting the protection pillars 8 and the protection plates 9, the top end of the protection strut 8 is provided with a first opening 24 opposite to the protection strut 8, the first opening 24 is internally provided with screw threads, the first top cover 21 is provided with a first connecting rod 25 and a second driving piece 26 which are in screw thread connection with the first opening 24, the top end of the protection plate 9 is provided with a second opening 27, the bottom ends of the first top cover 21 and the second top cover 22 are respectively provided with a second charging plug and a second connecting rod which are inserted into the second opening 27 which are opposite, and the second charging plug is inserted into the second opening 27 to be connected with the power supply 16 in the corresponding protection plate 9; the top end of the first top cover 21 is rotatably provided with a rotating plate 30 through a third driving piece 29, the top end of the rotating plate 30 is obliquely provided with a solar cell panel 31, a standby power supply 32 connected with the solar cell panel 31 and a second charging plug is arranged in the rotating plate 30, and the standby power supply 32 is connected with a second driving piece 26.
Four borders of solar cell panel 31 are provided with the highlight detector that is used for detecting illumination intensity, the highlight detector electricity is connected with the angle modulation chip, the angle modulation chip links to each other with third driving piece 29 and stand-by power supply 32 electricity.
The above description is intended to be illustrative of the present invention and not to limit the scope of the invention, which is defined by the claims appended hereto.
Claims (5)
1. The municipal engineering foundation pit safety protection device is characterized by comprising a lower supporting module, a middle protecting module and an upper cover plate module, wherein the lower supporting module comprises a plurality of supporting bases which are connected end to end and lifting moving pieces which are arranged in each supporting base, the middle protecting module comprises protecting support columns which are arranged on two sides and a plurality of protecting plates which are arranged between the two protecting support columns, and the bottom ends of the protecting support columns are connected with the supporting bases; the protection plate is characterized in that the two adjacent protection plates are connected in a rotating mode in the horizontal direction through a plurality of connecting hinges arranged from top to bottom, the connecting hinges are located on the front side face and the rear side face of each protection plate, the protection plates are not located on the same side with hinges connected with the adjacent protection plates on the left side and the right side in a rotating mode, a plurality of limiting rods are arranged on the end portions of the two sides of each protection plate and inserted into the adjacent protection plates, a first driving piece used for driving the limiting rods to stretch is arranged in each protection plate, a power supply connected with the first driving piece is arranged in each protection plate, the power supply is electrically connected with a first charging plug arranged at the end portion of each limiting rod, and the first charging plug is; the power supply is electrically connected with a controller for controlling the first driving piece; the protection plate is provided with a detection piece for detecting the inclination condition of the protection plate, the front side of the protection plate is provided with a warning area, an elastic protective guard and a verticality display screen, and the detection piece is electrically connected with the verticality display screen and the controller;
the upper cover plate module comprises a first top cover opposite to the top ends of the protection support columns and the outermost side protection plates and a second top cover opposite to the top ends of the inner side protection plates, second mounting grooves used for inserting the protection support columns and the protection plates are formed in the bottom ends of the first top cover and the second top cover, first openings opposite to the protection support columns are formed in the top ends of the protection support columns, threads are arranged in the first openings, first connecting rods and second driving pieces in threaded connection with the first openings are arranged on the first top cover, second openings are formed in the top ends of the protection plates, second charging plugs and second connecting rods inserted into the second openings are arranged at the bottom ends of the first top cover and the second top cover respectively, and the second charging plugs are inserted into the second openings to be connected with power supplies in the corresponding protection plates; the top of first top cap rotates through the third driving piece and is provided with the rotor plate, and the top slope of rotor plate is provided with solar cell panel, is provided with the stand-by power supply who links to each other with solar cell panel and second charging plug in the rotor plate, stand-by power supply has the second driving piece to link to each other.
2. The municipal engineering foundation pit safety device according to claim 1, wherein the top end of the support base is provided with a first mounting groove, the bottom end of the protection pillar is provided with a first fixing plate extending to the outside of the bottom end of the protection pillar, the first fixing plate is fixedly mounted in the first mounting groove through a bolt, and the upper part of the first mounting groove is slidably provided with a shielding plate for covering the first mounting groove.
3. The municipal engineering foundation pit safety device according to claim 2, wherein the top end of the support base is provided with a slope inclining upwards towards the center of the first installation groove, the shielding plate is arranged on the slope in a sliding mode along the inclination direction of the slope, and the lower portion of the protection strut is provided with an engagement groove matched with the end portion of the shielding plate.
4. The municipal engineering foundation pit safety device according to claim 1, wherein the bottom end of the support base is provided with a lifting channel, and the lifting moving member comprises a moving pulley sliding up and down in the lifting channel and a lifting structure for driving the moving pulley to extend out or hide.
5. The municipal engineering foundation pit safety device according to claim 1, wherein four edges of the solar panel are provided with a glare detector for detecting the intensity of illumination, the glare detector is electrically connected with an angle adjusting chip, and the angle adjusting chip is electrically connected with the third driving member and the standby power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110042405.1A CN112854899A (en) | 2021-01-13 | 2021-01-13 | Municipal works foundation ditch safety device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110042405.1A CN112854899A (en) | 2021-01-13 | 2021-01-13 | Municipal works foundation ditch safety device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112854899A true CN112854899A (en) | 2021-05-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110042405.1A Pending CN112854899A (en) | 2021-01-13 | 2021-01-13 | Municipal works foundation ditch safety device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112854899A (en) |
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2021
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|---|---|---|---|---|
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| CN201981554U (en) * | 2010-12-31 | 2011-09-21 | 曾义强 | Anti-theft manhole cover |
| CN107227887A (en) * | 2017-07-18 | 2017-10-03 | 温州大学瓯江学院 | The wind resistance hoarding of construction |
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Application publication date: 20210528 |