CN113585348A - Automatic safety well lid of reporting to police - Google Patents

Automatic safety well lid of reporting to police Download PDF

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Publication number
CN113585348A
CN113585348A CN202110861502.3A CN202110861502A CN113585348A CN 113585348 A CN113585348 A CN 113585348A CN 202110861502 A CN202110861502 A CN 202110861502A CN 113585348 A CN113585348 A CN 113585348A
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CN
China
Prior art keywords
fixedly connected
lug
well lid
fixed
groups
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Pending
Application number
CN202110861502.3A
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Chinese (zh)
Inventor
曹真
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Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to CN202110861502.3A priority Critical patent/CN113585348A/en
Publication of CN113585348A publication Critical patent/CN113585348A/en
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    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D29/00Independent underground or underwater structures; Retaining walls
    • E02D29/12Manhole shafts; Other inspection or access chambers; Accessories therefor
    • E02D29/14Covers for manholes or the like; Frames for covers
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01FADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
    • E01F9/00Arrangement of road signs or traffic signals; Arrangements for enforcing caution
    • E01F9/50Road surface markings; Kerbs or road edgings, specially adapted for alerting road users
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01FADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
    • E01F9/00Arrangement of road signs or traffic signals; Arrangements for enforcing caution
    • E01F9/50Road surface markings; Kerbs or road edgings, specially adapted for alerting road users
    • E01F9/506Road surface markings; Kerbs or road edgings, specially adapted for alerting road users characterised by the road surface marking material, e.g. comprising additives for improving friction or reflectivity; Methods of forming, installing or applying markings in, on or to road surfaces
    • E01F9/512Preformed road surface markings, e.g. of sheet material; Methods of applying preformed markings
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D29/00Independent underground or underwater structures; Retaining walls
    • E02D29/12Manhole shafts; Other inspection or access chambers; Accessories therefor
    • E02D29/14Covers for manholes or the like; Frames for covers
    • E02D29/1481Security devices, e.g. indicating unauthorised opening
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D33/00Testing foundations or foundation structures
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00Investigating fluid-tightness of structures
    • G01M3/02Investigating fluid-tightness of structures by using fluid or vacuum
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D2200/00Geometrical or physical properties
    • E02D2200/14Geometrical or physical properties resilient or elastic
    • E02D2200/146Springs
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D2300/00Materials
    • E02D2300/0001Rubbers

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  • Engineering & Computer Science (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Paleontology (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Architecture (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Underground Structures, Protecting, Testing And Restoring Foundations (AREA)

Abstract

The invention relates to the technical field of road construction, and discloses a safety well lid capable of automatically alarming, which comprises a main body, wherein two groups of annular cavities which are symmetrical up and down are arranged inside the main body, a rubber ring is fixedly connected inside the annular cavities, a supporting plate is fixedly connected at the other end of the rubber ring, through the arrangement of the annular cavities, the supporting plate, a connecting rope and a fixed shaft, when a crack or a part of the well lid main body is cracked, air enters a sealed cavity formed by the annular cavities, the rubber ring and the supporting plate from the crack, so that a supporting spring is reset, the supporting plate can be pushed to move towards the middle inside of the main body, at the moment, the connecting rope is loosened, a movable lug connected with the connecting rope loses the tension of the connecting rope, under the rebound action of a corresponding reset spring, a movable contact and a corresponding fixed contact are electrified, so that an alarm is started to alarm, so that maintenance personnel can maintain or replace the manhole cover quickly and solve the potential safety hazard existing in the manhole cover in time.

Description

Automatic safety well lid of reporting to police
Technical Field
The invention relates to the technical field of road construction, in particular to a safety well cover capable of automatically alarming.
Background
There are many underground pipelines in the urban construction, for example sewer, underground gas pipeline, water supply line, power pipeline, communication pipeline, national defense pipeline etc. these pipelines will have an export that leads to ground every section, and export department generally all installs various well lids, well lid, be used for covering road or the deep well of family, prevent that people or object from falling, can divide into metal well lid, high strength fiber cement concrete well lid, resin well lid etc. according to the material, generally adopt circularly, can be used to greenbelt, pavement, motor vehicle lane, pier, lane etc..
Because people and vehicles come and go on the road surface, and the well lid is rolled by pedestrian, vehicle etc. that pass by for a long time, very easily leads to well lid upper and lower surface to produce crack or damage, if untimely maintenance, change, will have serious potential safety hazard, very easily takes place danger, influences people and the normal current of vehicle, especially in evening, people generally can not notice whether subaerial well lid is intact, causes the threat to people's the security of the lives and property easily.
Disclosure of Invention
Aiming at the defects of the background technology, the invention provides the safety well lid capable of automatically alarming, which has the advantages of automatically detecting cracks, fractures and alarms of the well lid, avoiding potential safety hazards and solving the problems in the background technology.
The invention provides the following technical scheme: a safety well lid capable of automatically alarming comprises a main body, wherein two groups of ring cavities which are symmetrical up and down are arranged inside the main body, a rubber ring is fixedly connected inside the ring cavities, a supporting plate is fixedly connected to the other end of the rubber ring, a plurality of groups of supporting springs which are arranged at equal intervals are fixedly connected to one end, facing the inside of the rubber ring, of the supporting plate, the other ends of the supporting springs are fixedly connected with the inner wall of the ring cavities, a connecting rope is fixedly connected to the middle of the other ends of the two groups of supporting plates, an installation cavity is arranged in the middle of the main body, a fixing shaft is fixedly connected to the middle of the installation cavity, a fixing plate is fixedly connected to the middle of the fixing shaft, four groups of fixing lugs which are arranged at equal intervals are fixedly arranged on the side surface of the fixing plate, a fixed contact is fixedly connected to one side of each fixing lug, and a reset spring is fixedly connected to the other side of each fixing lug, the top and the below of fixed plate all are provided with the fly leaf that cup joints with the fixed axle activity, and are two sets of the equal fixedly connected with movable lug in both ends of fly leaf, four groups the equal fixedly connected with movable contact in one side of movable lug, four groups the opposite side of movable lug all is connected with the fixed lug in close one side through reset spring, top the other end of connecting the rope is provided with reset spring one side fixed connection, below with top movable lug respectively the other end of connecting the rope is provided with reset spring one side fixed connection with below movable lug respectively, the inside of fixed axle is provided with the alarm.
Preferably, four groups of prying holes which are arranged in a uniform circumference mode are formed in the side face of the middle portion of the upper end of the main body, the bottom of each prying hole is fixedly connected with a sleeve, two groups of connecting channels which are communicated with the upper annular cavity and the lower annular cavity are formed in the side face of the sleeve, the upper end of the sleeve is fixedly connected with a corrugated pipe, the upper end of the corrugated pipe is fixedly connected with a sliding plate which is movably sleeved with the prying holes, the upper end of the sliding plate is fixedly connected with a display board, and the other end of the bottom of the sliding plate is fixedly connected with a tension spring which is fixedly connected with the sleeve.
Preferably, a closed cavity is formed between the annular cavity and the rubber ring supporting plate, and the annular cavity and the rubber ring supporting plate are in a negative pressure pumping state in an initial state.
Preferably, fixed lug, activity lug are L shape lug, top the protruding downwards of activity lug L shape, below the protruding upwards of activity lug L shape, two sets of lug L shape that are connected through reset spring and the movable lug of top are protruding upwards in the fixed lug, two sets of protruding block L shape that are connected through reset spring and the movable lug of below are protruding downwards in the fixed lug.
Preferably, the two sets of connecting channels are provided with pressure check valves in the inner part, and the openings of the pressure check valves face to the inner part of the sleeve.
Preferably, the upper end of the fixed shaft is provided with an LED lamp.
The invention has the following beneficial effects:
1. through the annular chamber, the backup pad, connect the rope, the setting of fixed axle, when the crack or fracture take place for the well lid main part, when taking place crack or partial fracture, the air will get into by the annular chamber from the crack, the rubber circle, in the sealed chamber that the backup pad is constituteed, thereby make supporting spring reset, can promote the backup pad to the inside middle removal of main part, at this moment, connect the rope and be loosened, lead to the movable lug to lose the pulling force of the connection rope that links to each other with it, can be under corresponding reset spring rebound effect, make movable contact and the contact circular telegram of deciding of correspondence, thereby start the alarm and report to the police, so that maintenance personal is quick to its maintenance or change, in time solve the potential safety hazard that this well lid exists.
2. Through the interface channel, the bellows, the setting of display board, when the main part crack production makes the backup pad remove, still make backup pad compression annular chamber do not have the inside existing air in rubber circle one side, make wherein the air pass through inside the interface channel entering sleeve, make the bellows expand the pulling force that overcomes the supporting spring by the air and upwards extend, can release the display board, the character that the remark was forbidden to trample on the display board, make it appear at well lid main part upper surface, can remind passerby to avoid trampling the well lid that has damaged, notice safety.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is an enlarged view of the structure A of the present invention;
FIG. 3 is an enlarged view of the structure B of the present invention;
FIG. 4 is a schematic view of the installation of the movable plate of the structure of the present invention;
fig. 5 is an enlarged view of the structure C of the present invention.
In the figure: 1. a main body; 2. an annular cavity; 3. a rubber ring; 4. a support plate; 5. a support spring; 6. connecting ropes; 7. a mounting cavity; 8. a fixed shaft; 9. a fixing plate; 10. fixing the bump; 11. fixing a contact point; 12. a return spring; 13. a movable plate; 14. a movable projection; 15. a movable contact; 16. an alarm; 17. an LED lamp; 18. prying a hole; 19. a sleeve; 20. a connecting channel; 21. a bellows; 22. a slide plate; 23. a display board; 24. a tension spring.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-5, an automatic alarm safety well lid comprises a main body 1, two sets of vertically symmetrical annular cavities 2 are formed inside the main body 1, a rubber ring 3 is fixedly connected inside the annular cavities 2, a supporting plate 4 is fixedly connected to the other end of the rubber ring 3, a plurality of sets of support springs 5 arranged at equal intervals are fixedly connected to one end of the supporting plate 4 facing the inside of the rubber ring 3, the other ends of the support springs 5 are fixedly connected to the inner wall of the annular cavities 2, a connecting rope 6 is fixedly connected to the middle of the other ends of the two sets of supporting plates 4, a mounting cavity 7 is formed in the middle of the main body 1, a fixing shaft 8 is fixedly connected to the middle of the mounting cavity 7, a fixing plate 9 is fixedly connected to the middle of the fixing shaft 8, four sets of fixing lugs 10 arranged at equal intervals are fixedly mounted to the side surface of the fixing plate 9, a fixing contact 11 is fixedly connected to one side of the fixing lug 10, and a return spring 12 is fixedly connected to the other side of the fixing lug 10, the upper and lower parts of the fixed plate 9 are respectively provided with a movable plate 13 movably sleeved with the fixed shaft 8, two ends of two groups of movable plates 13 are respectively fixedly connected with a movable lug 14, one side of each group of movable lugs 14 is respectively fixedly connected with a movable contact 15, the other side of each group of movable lugs 14 is respectively connected with a fixed lug 10 on the close side through a return spring 12, the fixed lugs 10 and the movable lugs 14 are respectively L-shaped lugs, a 14L-shaped bulge of the upper movable lug faces downwards, a 14L-shaped bulge of the lower movable lug faces upwards, two groups of lugs L-shaped bulges in the fixed lugs 10, which are connected with the upper movable lug 14 through the return spring 12, are upwards arranged in the fixed lugs 10, two groups of lugs L-shaped bulges in the fixed lugs 10, which are connected with the lower movable lug 14 through the return spring 12, the other end of the upper connecting rope 6 is respectively fixedly connected with one side of the return spring 12, and the other end of the lower connecting rope 6 is respectively fixedly connected with one side of the lower movable lug 14, which is provided with the return spring 12 The inside of fixed axle 8 is provided with alarm 16, four groups of sled holes 18 that wait the circumference range are seted up to the side at the middle part of main part 1 upper end, the bottom fixedly connected with sleeve 19 of sled hole 18, two sets of connect the passageway 20 with upper and lower annular chamber 2 intercommunication respectively are seted up to the side of sleeve 19, the upper end fixedly connected with bellows 21 of sleeve 19, the upper end fixedly connected with of bellows 21 and the slide 22 that sled hole 18 activity cup jointed, the upper end fixedly connected with display board 23 of slide 22, the bottom fixedly connected with other end of slide 22 and sleeve 19 fixed connection's extension spring 24.
Wherein, constitute a airtight appearance chamber between annular chamber 2 and 3 backup pads 4 of rubber circle, and be taken out negative pressure state under initial condition, through setting it to the negative pressure, can be when any one crack or local damage take place in well lid main part 1 upper and lower surface, can make the air get into fast, thereby realize forming an airtight appearance chamber by annular chamber 2 and 3 backup pads 4 of rubber circle and detect well lid main part 1 and whether appear the crack, damage, and in time report to the police, can remind maintainer to carry out quick maintenance change to it, solve the potential safety hazard that probably appears, guarantee people's safety.
The pressure type check valves with openings facing the interior of the sleeve 19 are arranged in the two groups of connecting channels 20, when the main body 1 cracks to enable the supporting plate 4 to move, the supporting plate 4 compresses the existing air in the rubber-free ring side of the annular cavity 2, the air enters the interior of the sleeve 19 through the connecting channels 20, the corrugated pipe 21 is stretched by the air to overcome the tensile force of the tension spring 24 to extend upwards, the display board 23 can be pushed out, characters which are forbidden to be trampled are remarked on the display board 23, the characters appear on the upper surface of the main body 1, and passersby can be reminded of paying attention to safety.
Wherein, the upper end of fixed axle 8 is provided with LED lamp 17, can send the light at night, avoids people to trample on crack, damaged well lid appear, reminds people to pay attention to safety.
According to the working principle, in an initial state, the inside of a sealed cavity consisting of the annular cavity 2, the rubber ring 3 and the support plate 4 is pumped into a negative pressure state, so that the support plate 4 compresses the support spring 5, at the moment, the position of the support plate 4 is kept because the inside and the surface of the main body are not intact, each movable lug 14 can be pulled to be separated from the corresponding fixed lug 10 by overcoming the elasticity of the return spring 12 through the connecting rope 6, and the well cover can be normally used;
once the manhole cover body 1 is cracked or partially broken at the upper end thereof due to a long time use or heavy pressure, air enters a sealing cavity consisting of the upper annular cavity 2, the rubber ring 3 and the supporting plate 4 from the crack, thereby, the supporting spring 5 is reset, and the supporting plate 4 can be pushed to move towards the middle of the inner part of the main body 1, at this time, the upper connecting rope 6 is loosened, the upper movable lug 14 loses the tension of the upper connecting rope 6, the upper movable contact 15 can be contacted and electrified with the corresponding fixed contact 11 under the rebounding action of the corresponding return spring 12, thereby starting the alarm 16 to give an alarm, and if a crack or the like appears at the bottom of the main body 1, the lower movable contact 15 is correspondingly contacted with the corresponding fixed contact 11 to be electrified, so that maintenance personnel can maintain or replace the manhole cover quickly, and the potential safety hazard of the manhole cover is solved;
meanwhile, when the main body 1 cracks to enable the supporting plate 4 to move, the supporting plate 4 can compress the existing air in the rubber-free ring side of the annular cavity 2, the air enters the sleeve 19 through the connecting channel 20, the corrugated pipe 21 is stretched by the air to overcome the tensile force of the tension spring 24 and extend upwards, the display board 23 can be pushed out, characters which are forbidden to be trampled are remarked on the display board 23 and appear on the upper surface of the main body 1, and a passerby can be reminded of paying attention to safety.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (6)

1. The utility model provides an automatic safety well lid of reporting to police, includes main part (1), its characterized in that: two groups of vertically symmetrical annular cavities (2) are formed in the main body (1), a rubber ring (3) is fixedly connected in the annular cavity (2), a supporting plate (4) is fixedly connected to the other end of the rubber ring (3), a plurality of groups of supporting springs (5) which are arranged at equal intervals are fixedly connected to one end, facing the inside of the rubber ring (3), of the supporting plate (4), the other end of each supporting spring (5) is fixedly connected with the inner wall of the annular cavity (2), a connecting rope (6) is fixedly connected to the middle of the other ends of the two groups of supporting plates (4), a mounting cavity (7) is formed in the middle of the main body (1), a fixing shaft (8) is fixedly connected to the middle of the mounting cavity (7), a fixing plate (9) is fixedly connected to the middle of the fixing shaft (8), and four groups of fixing lugs (10) which are arranged at equal intervals are fixedly mounted on the side surface of the fixing plate (9), one side of each fixed lug (10) is fixedly connected with a fixed contact (11), the other side of each fixed lug (10) is fixedly connected with a reset spring (12), movable plates (13) movably sleeved with the fixed shaft (8) are arranged above and below the fixed plate (9), two ends of each two groups of movable plates (13) are fixedly connected with movable lugs (14), one sides of the four groups of movable lugs (14) are fixedly connected with movable contacts (15), the other sides of the four groups of movable lugs (14) are connected with the fixed lugs (10) on the close side through the reset springs (12), the other ends of the upper connecting ropes (6) are respectively fixedly connected with the movable lugs (14) on the upper side through the reset springs (12), the other ends of the lower connecting ropes (6) are respectively fixedly connected with the movable lugs (14) on the lower side through the reset springs (12), an alarm (16) is arranged inside the fixed shaft (8).
2. The automatic alarm safety well lid of claim 1, characterized in that: prying holes (18) that four groups of equal circumference were arranged are seted up to the side at main part (1) upper end middle part, the bottom fixedly connected with sleeve (19) of prying hole (18), connecting channel (20) of two sets of difference and upper and lower annular chamber (2) intercommunication are seted up to the side of sleeve (19), the upper end fixedly connected with bellows (21) of sleeve (19), slide (22) that the upper end fixedly connected with and prying hole (18) activity of bellows (21) cup jointed, the upper end fixedly connected with display board (23) of slide (22), the bottom fixedly connected with other end and sleeve (19) fixed connection's extension spring (24) of slide (22).
3. The automatic alarm safety well lid of claim 1, characterized in that: a closed cavity is formed between the annular cavity (2) and the supporting plate (4) of the rubber ring (3), and the annular cavity is in a negative pressure pumping state in an initial state.
4. The automatic alarm safety well lid of claim 1, characterized in that: fixed lug (10), activity lug (14) are L shape lug, top the protruding down of activity lug (14) L shape, below the protruding up of activity lug (14) L shape, two sets of lug L shape that are connected through reset spring (12) and top activity lug (14) are protruding up in fixed lug (10), two sets of lug L shape that are connected through reset spring (12) and below activity lug (14) are protruding down in fixed lug (10).
5. The automatic alarm safety well lid of claim 2, characterized in that: the interior of both sets of said connecting channels (20) is provided with a pressure-type check valve opening towards the interior of the sleeve (19).
6. The automatic alarm safety well lid of claim 1, characterized in that: and an LED lamp (17) is arranged at the upper end of the fixed shaft (8).
CN202110861502.3A 2021-07-29 2021-07-29 Automatic safety well lid of reporting to police Pending CN113585348A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110861502.3A CN113585348A (en) 2021-07-29 2021-07-29 Automatic safety well lid of reporting to police

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110861502.3A CN113585348A (en) 2021-07-29 2021-07-29 Automatic safety well lid of reporting to police

Publications (1)

Publication Number Publication Date
CN113585348A true CN113585348A (en) 2021-11-02

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Application Number Title Priority Date Filing Date
CN202110861502.3A Pending CN113585348A (en) 2021-07-29 2021-07-29 Automatic safety well lid of reporting to police

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CN (1) CN113585348A (en)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201654927U (en) * 2010-04-13 2010-11-24 夏元利 Wireless voice alarm for street well cover
CN202331123U (en) * 2011-02-01 2012-07-11 北京清大博海科技有限公司 State monitoring device of cable inspection well
CN107558500A (en) * 2017-09-08 2018-01-09 国网四川省电力公司绵阳供电公司 Well lid early warning system
WO2019041395A1 (en) * 2017-08-28 2019-03-07 贾仰胜 Manhole cover alarm system
CN111155559A (en) * 2020-01-10 2020-05-15 冯继超 Well lid for municipal works
CN112761189A (en) * 2020-12-30 2021-05-07 黄陈霞 Inspection shaft warning device for town road
CN213773480U (en) * 2020-07-16 2021-07-23 泉州市洁强道路设施有限公司 Anti-theft well cover

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201654927U (en) * 2010-04-13 2010-11-24 夏元利 Wireless voice alarm for street well cover
CN202331123U (en) * 2011-02-01 2012-07-11 北京清大博海科技有限公司 State monitoring device of cable inspection well
WO2019041395A1 (en) * 2017-08-28 2019-03-07 贾仰胜 Manhole cover alarm system
CN107558500A (en) * 2017-09-08 2018-01-09 国网四川省电力公司绵阳供电公司 Well lid early warning system
CN111155559A (en) * 2020-01-10 2020-05-15 冯继超 Well lid for municipal works
CN213773480U (en) * 2020-07-16 2021-07-23 泉州市洁强道路设施有限公司 Anti-theft well cover
CN112761189A (en) * 2020-12-30 2021-05-07 黄陈霞 Inspection shaft warning device for town road

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Application publication date: 20211102

RJ01 Rejection of invention patent application after publication