CN108086360B - Integrated anti-sedimentation anti-falling well lid and unlocking device thereof - Google Patents
Integrated anti-sedimentation anti-falling well lid and unlocking device thereof Download PDFInfo
- Publication number
- CN108086360B CN108086360B CN201711393279.4A CN201711393279A CN108086360B CN 108086360 B CN108086360 B CN 108086360B CN 201711393279 A CN201711393279 A CN 201711393279A CN 108086360 B CN108086360 B CN 108086360B
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- rod
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- unlocking
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- sedimentation
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- 238000004062 sedimentation Methods 0.000 title claims abstract description 15
- 238000003825 pressing Methods 0.000 claims description 10
- 230000003014 reinforcing effect Effects 0.000 claims description 7
- 230000000149 penetrating effect Effects 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 9
- 239000012535 impurity Substances 0.000 description 9
- 238000005452 bending Methods 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/12—Manhole shafts; Other inspection or access chambers; Accessories therefor
- E02D29/127—Manhole shafts; Other inspection or access chambers; Accessories therefor with devices for impeding fall or injuries of persons
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/12—Manhole shafts; Other inspection or access chambers; Accessories therefor
- E02D29/14—Covers for manholes or the like; Frames for covers
- E02D29/1427—Locking devices
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/12—Manhole shafts; Other inspection or access chambers; Accessories therefor
- E02D29/14—Covers for manholes or the like; Frames for covers
- E02D29/1481—Security devices, e.g. indicating unauthorised opening
Landscapes
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Sewage (AREA)
Abstract
The invention relates to the technical field of municipal facilities, in particular to an integrated sedimentation-preventing and falling-preventing well lid and an unlocking device thereof. The utility model provides an integral type anti-sedimentation anti-falling well lid, includes lid and base that rotates the connection mutually, the inboard of lid is equipped with a latch lock, the base is equipped with the boss, has still shelved an inner cup on this base, the outer lane of inner cup is fixed with the boss butt. An unlocking device of a well lid is used for unlocking a latch lock in the well lid and comprises a supporting rod, an unlocking piece rotatably connected to the bottom of the supporting rod and a rotating rod arranged on the upper portion of the supporting rod, wherein the supporting rod is hollow, a push rod is inserted into the upper opening of the supporting rod, and the unlocking piece can be rotated by pushing down the push rod. The invention provides an integrated anti-sedimentation anti-falling well cover which is simple in structure and capable of effectively preventing theft and an unlocking device thereof.
Description
Technical Field
The invention relates to the technical field of municipal facilities, in particular to an integrated sedimentation-preventing and falling-preventing well lid and an unlocking device thereof.
Background
Because the well lid can take place the problem of losing because of multiple reasons, pedestrian falls the well hole easily and takes place the accident when losing the well lid, consequently current well lid can set up a prevent weighing down the net in it, but also has taken place the danger that the people falls behind the well hole and is caught by preventing weighing down the net and be difficult for the dislocation.
Thus, a new design of the anti-falling well cover is generated on the basis of the anti-falling net, such as the technical content disclosed in Chinese patent CN 205369317U: the utility model provides a novel well lid that falls is prevented, including the well seat and with well seat assorted lid, well seat inner wall is equipped with the carriage that is used for supporting the lid, is equipped with the anti-falling inner cup in the well seat, and the equipartition has a plurality of rotatory protruding handles in the anti-falling inner cup, and a plurality of supporting shoe of connection can be dismantled to well seat inner wall, and the supporting shoe is the same with rotatory protruding handle quantity, and opens on the supporting shoe has rectangular hole, rectangular hole one end is equipped with spacing hole, and the other end is equipped with stretches out the hole, and spacing hole diameter is corresponding with rotatory protruding handle diameter, stretches out the hole diameter and is greater than rotatory protruding handle diameter.
According to the technical scheme, although the safety problem caused by the existing anti-falling net is solved, the anti-falling inner cover of the anti-falling net is required to be fixed by a plurality of rotary convex handles, the installation and the disassembly are very inconvenient, and the well cover of the anti-falling net is not provided with a safety device and is easy to steal.
Disclosure of Invention
The invention aims to solve the technical problem of providing an integrated anti-sedimentation anti-falling well cover which is simple in structure and capable of effectively preventing burglary. In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
the utility model provides an integral type anti-sedimentation anti-falling well lid, includes lid and base that rotates the connection mutually, the inboard of lid is equipped with a latch lock, the base is equipped with the boss, has still shelved an inner cup on this base, the outer lane of inner cup is fixed with the boss butt. The setting of shelving of inner cup can realize the light installation and the dismantlement of inner cup, can change or wash the inner cup regularly according to the in-service use condition, and is simple and convenient.
On the basis of adopting the technical scheme, the invention can also adopt the following further scheme:
the bolt lock is fixed on the inner side of the cover body through a connecting sheet and comprises a screw rod and a top pressing rod arranged on the screw rod, the screw rod penetrates through a fixing ring arranged on the connecting sheet to be fixed on the connecting sheet, and a spring is sleeved between the top pressing rod and the fixing ring by the screw rod; the connecting piece is provided with a lock hole penetrating through the cover body in front of the top pressing rod. The arrangement of the latch lock not only can ensure that the cover body cannot be lost, but also can easily lock the cover body and the base, and is convenient to operate due to the reset structure of the spring.
The base is provided with a fixed slot, a mounting seat is arranged in the fixed slot, a connecting plate is fixed on the inner side of the cover body, and the connecting plate is connected with the mounting seat through a connecting seat.
The connecting seat is inserted on the mounting seat, the two sides of the upper end of the connecting seat are respectively provided with a fixed block, the fixed blocks are provided with through holes, the two sides of the front end of the connecting plate are provided with bolts, and the bolts are inserted into the through holes of the fixed blocks so that the connecting plate can rotate relative to the connecting seat.
The mounting seats are provided with two cylinders which are respectively fixed on two sides of the fixed groove and are provided with slots; the lower part of the connecting seat is also provided with a convex reinforcing sheet, and the reinforcing sheet can be fixed with the base through bolts. The setting of mount pad plays buffering and fixed action between connecting seat and the base, because can take place relative rotation between connecting plate and the connecting seat, the mount pad provides spacing fixed action for the connecting seat when rotating, guarantees to open and cover the in-process connecting seat stability and can not take place to remove at the lid.
The connecting seat is characterized in that a clamping piece is further fixed at the connecting end of the connecting seat and the cover body, a convex edge is arranged above the boss of the base, and the clamping piece can be clamped and fixed with the convex edge. The clamping piece is of a two-fold sheet structure, wherein one bending angle is 90 degrees, and the other bending angle is more than 90 degrees and less than 180 degrees. The clamping piece can be clamped with the convex edge of the base when the cover body is covered, so that the firmness between the cover body and the base after the cover body is covered is further ensured; meanwhile, the bending angle is between 90 degrees and 180 degrees, so that the clamping piece can be separated from the convex edge when the cover body is turned over.
The cover body can be turned up to be 180 degrees with the base.
The inner cover is a cover body which is concave inwards from the outer ring of the inner cover, and the cover body consists of a bottom surface and an inclined side wall.
The side wall is provided with an assembly port penetrating through the outer ring, the side wall is further provided with at least one curved convex part, the upper end of the curved convex part is leveled with the outer ring, and the lower end of the curved convex part is connected with the bottom surface. The curved convex part is arranged to ensure that water flow can smoothly flow down the side wall when raining or road cleaning is performed.
The bottom surface is provided with a cross-shaped supporting rib protruding upwards, four diversion trenches are arranged at the central junction of the supporting rib, and the connection position of the bottom surface and the side wall forms a petal-shaped curved edge due to the protruding and cross-shaped arrangement of the supporting rib. Because the road surface at ordinary times does not avoid impurity such as earth, rubble, can bring the impurity into the well lid together when raining or road surface washs, the supporting rib can cooperate with curved limit and make the impurity can not pile up on lateral wall and bottom surface, can guarantee that the impurity can be along the drainage down in the well of rivers.
Further, the part of the bottom surface except the supporting ribs is a horizontal surface, and a drainage hole is further formed in the position, close to the side wall, of the horizontal surface, and the drainage hole provides space for water to flow into the well.
Further, the invention also provides the following technical scheme:
an unlocking device of a well lid is used for unlocking a latch lock in the well lid and comprises a supporting rod, an unlocking piece rotatably connected to the bottom of the supporting rod and a rotating rod arranged on the upper portion of the supporting rod, wherein the supporting rod is hollow, a push rod is inserted into the upper opening of the supporting rod, and the unlocking piece can be rotated by pushing down the push rod.
The middle part of the unlocking plate is connected with the lower part of the supporting rod through a rotating shaft, the unlocking plate is in a long strip shape, one side of the long strip shape is provided with two right angles, and the other side of the long strip shape is provided with an arc.
The hollow part of the support rod is provided with an internal thread, the push rod is provided with an external thread, and the push rod is in threaded connection with the support rod; the top end of the push rod is also provided with a rotary handle.
When the unlocking device is used, the unlocking device is inserted into the lock hole, the push rod is pressed down to enable the unlocking plate to be in a vertical state to be in a transverse state, and then the supporting rod is rotated to push the top pressing rod to drive the screw rod to move upwards to compress the spring, so that unlocking between the cover body and the base is achieved.
The invention has the advantages that: the light and thin inner cover with high bearing capacity is utilized to replace the traditional anti-falling net, and the inner cover is simply placed on the base, so that the anti-falling net is convenient to install and replace, and the danger of falling of people can be avoided. Meanwhile, the special arrangement of the bolt lock and the unlocking device can effectively prevent the cover body from being opened by others, and the well cover is prevented from being stolen on the premise of ensuring unlocking convenience.
Drawings
Fig. 1 is a cover state diagram of an integrated sedimentation-proof and falling-proof manhole cover and an unlocking device thereof.
Fig. 2 is an open state diagram of an integrated sedimentation-proof and falling-proof manhole cover and an unlocking device thereof.
Fig. 3 is a side view of an integrated sedimentation-proof and fall-proof manhole cover and an unlocking device thereof.
Fig. 4 is a schematic diagram of a cover and a base connection structure of an integrated anti-sedimentation anti-falling well cover and an unlocking device thereof.
Fig. 5 is a schematic diagram of a connection seat of an integrated anti-sedimentation anti-falling well lid and an unlocking device thereof.
Fig. 6 is a schematic structural diagram of a connection plate of an integrated sedimentation-proof and falling-proof manhole cover and an unlocking device thereof.
Fig. 7 is a schematic diagram of a latch lock structure of an integrated anti-sedimentation anti-falling well lid and an unlocking device thereof.
Fig. 8 is a schematic diagram of the structure of an inner cover of an integrated sedimentation-proof and falling-proof manhole cover and an unlocking device thereof.
Fig. 9 is a schematic diagram showing an integral sedimentation-proof and falling-proof manhole cover and an unlocking device of the unlocking device before insertion.
Fig. 10 is a schematic diagram showing an integrated anti-sedimentation anti-falling well lid and an unlocking device of the unlocking device thereof after insertion.
Wherein, lid 1, base 2, boss 21, fixed slot 22, chimb 23, inner cup 3, outer lane 31, bottom surface 32, brace 321, guiding gutter 322, curved edge 323, lateral wall 33, assembly mouth 331, curved protrusion 332, drainage hole 333, connection piece 41, screw rod 42, top depression bar 43, retainer plate 44, spring 45, lockhole 46, mount pad 5, connecting plate 6, bolt 61, connection seat 7, fixed block 71, through-hole 72, reinforcement piece 73, fastener 8, bracing piece 91, unlocking piece 92, rotary rod 93, push rod 94, rotation handle 95.
Detailed Description
The invention relates to an integrated sedimentation-proof and falling-proof well cover and an unlocking device thereof, which are further described below with reference to the accompanying drawings.
As shown in fig. 1-7, an integrated anti-sedimentation anti-falling well cover comprises a cover body 1 and a base 2 which are connected in a rotating way, wherein the cover body 1 can be turned up to be 180 degrees with the base 2.
The inside of the cover 1 is provided with a latch lock which is fixed to the inside of the cover 1 by a connecting piece 41. The latch lock comprises a screw rod 42 and a pushing rod 43 arranged on the screw rod 42, wherein the screw rod 42 penetrates through a fixing ring 44 arranged on the connecting sheet 41 to be fixed on the connecting sheet 41, and a spring 45 is sleeved between the pushing rod 43 and the fixing ring 44 by the screw rod 42. For unlocking, the connecting piece 41 is provided with a lock hole 46 penetrating the cover 1 in front of the pressing rod 43.
The base 2 is provided with a boss 21, the base 2 is also provided with an inner cover 3, and an outer ring 31 of the inner cover 3 is propped against the boss 21 to be fixed. Wherein, fixed slot 22 has been seted up to base 2, is equipped with mount pad 5 in this fixed slot 22, and lid 1 inboard is fixed with connecting plate 6, and connecting plate 6 passes through connecting seat 7 and is connected with mount pad 5. The connecting plate 6 and the cover body 1 can be fixedly connected through bolts so as to be convenient to detach.
Further, fixing blocks 71 are respectively arranged at two sides of the upper end of the connecting seat 7, through holes 72 are formed in the fixing blocks 71, and bolts 61 are arranged at two sides of the front end of the connecting plate 6, and the bolts 61 are inserted into the through holes 72 of the fixing blocks 71 so that the connecting plate 6 can rotate relative to the connecting seat 7.
Further, two mounting seats 5 are provided and respectively fixed on two sides of the fixing groove 22, the mounting seats 5 are cylinders provided with slots, and the connecting seats can be inserted into the slots of the two mounting seats 5 for fixing.
Further, a protruding reinforcing plate 73 is further arranged below the connecting seat 7, and the reinforcing plate 73 can be fixed with the base 2 through bolts.
Further, a clamping piece 8 is fixed at the connecting end of the connecting seat 7 and the cover body 1, a convex edge 23 is arranged above the boss 21 of the base 2, and the clamping piece 8 can be clamped and fixed with the convex edge 23. Wherein, the clamping piece 8 is a two-fold sheet structure, wherein, one bending angle is 90 degrees, and the other bending angle is more than 90 degrees and less than 180 degrees.
As shown in fig. 8, the inner lid 3 is a lid body recessed inward from the outer ring 31 of the inner lid 3, and the lid body is composed of a bottom surface 32 and inclined side walls 33.
Wherein, two assembly openings 331 penetrating through the outer ring 31 are formed on the side wall 33, and the two assembly openings 331 are oppositely arranged. Since the fitting port 331 is in contact with the base 2 and the cover 1, in order to increase the strength of the fitting port 331, the opening edge of the fitting port 331 is thickened and protrudes outward from the side wall 33.
Further, six curved protruding portions 332 are arranged on the side wall 33, the upper ends of the curved protruding portions 332 are flat with the outer ring 31, the lower ends of the curved protruding portions 332 are connected with the bottom surface 32, the curved protruding portions 332 are arc-shaped protrusions, the protruding radian of each curved protruding portion is 90 degrees, the curved protruding portions can play a role of reinforcing ribs due to the arrangement of the radians, the firmness of the inner cover 3 is improved, and inflow rainwater mixed with impurities such as soil can be split from two sides of the curved protruding portions 332, so that smooth drainage of the rainwater is guaranteed. Wherein, two sides of the two assembling ports 331 are respectively provided with a curved protrusion 332, and side walls at an included angle of 90 degrees with the assembling ports 331 are respectively provided with a curved protrusion 332.
Further, upward protruding cross-shaped supporting ribs 321 are arranged on the bottom surface 32, four diversion trenches 322 are arranged at the central intersection of the supporting ribs 321, and due to the protruding and cross-shaped arrangement of the supporting ribs 321, petal-shaped curved edges 323 are formed at the joint of the bottom surface 32 and the side walls 33, accumulation of impurities such as soil on the inner cover 3 can be reduced due to arrangement of the curved edges 323, and the impurities on the inner cover 3 can be well discharged into a well along water flow when raining or road surface flushing.
Further, the bottom surface 32 is a horizontal surface except the supporting ribs 321, and a drain hole 333 is further provided at the position of the horizontal surface near the side wall 33, and the drain hole 333 is provided at the lower end near the curved protrusion 332, so that impurities and water flow can be drained better by matching with the curved protrusion 332.
Further, the protruding radian of the supporting rib 321 is 135 °, and when the protruding radian is reached, impurities such as silt and broken stone are not accumulated on the supporting rib 321, and water flow can smoothly flow into the drain hole 333 from the supporting rib 321, so that the drainage effect is optimal.
As shown in fig. 9-10, an unlocking device for a manhole cover is used for unlocking a latch lock in the manhole cover, and comprises a support rod 91, an unlocking piece 92 rotatably connected to the bottom of the support rod 91, and a rotating rod 93 arranged on the upper part of the support rod 91. Wherein, the supporting rod 91 is hollow, a push rod 94 is inserted into the upper opening of the supporting rod 91, and the unlocking piece 92 can be rotated by pressing the push rod 94.
Regarding the portion where the unlocking piece 92 can be pushed to rotate, since the middle portion of the unlocking piece 92 is connected to the lower portion of the supporting rod 91 by a rotation shaft, the unlocking piece 92 is in a long bar shape, one side of the long bar shape is two right angles, and the other side of the long bar shape is an arc. When the unlocking plate 92 is in a vertical state, due to the fact that the weight of the two right-angle sides is heavier than that of the circular arc, the two right-angle sides face downwards and the circular arc sides face upwards under the action of gravity, along with the downward movement of the push rod 94, the push rod 94 gradually pushes the circular arc sides of the unlocking plate 92, and due to the combined action of the pushing force and the circular arc structure, the unlocking plate 92 can rotate until the vertical state is changed into a horizontal state.
Further, the hollow portion of the supporting rod 91 is provided with an internal thread, the push rod 94 is provided with an external thread, and the push rod 94 is in threaded connection with the supporting rod 91.
Further, to facilitate the rotation of the push rod 94, a rotation handle 95 is provided at the top end thereof.
The present invention has been disclosed with reference to the embodiments, but various changes in form and detail of the present invention will still fall within the scope of the present invention by those skilled in the art without departing from the disclosure of the invention, the scope of the claims of the embodiments.
Claims (7)
1. The utility model provides an integral type anti-sedimentation anti-falling well lid, includes lid and base that rotate the connection mutually, its characterized in that the inboard of lid is equipped with a latch lock, the base is equipped with the boss, has still shelved an inner cup on this base, the outer lane of inner cup is fixed with the boss butt, the fixed slot has been seted up to the base, is equipped with the mount pad in this fixed slot, the lid inboard is fixed with the connecting plate, the connecting plate passes through the connecting seat and is connected with the mount pad, the connecting seat is pegged graft on the mount pad, and the both sides of this connecting seat upper end are equipped with the fixed block respectively, and the through-hole has been seted up to the fixed block, the both sides of connecting plate front end are equipped with the bolt, and this bolt inserts the through-hole of fixed block so that the connecting plate can rotate for the connecting seat, the mount pad is equipped with two and is fixed in the both sides of fixed slot respectively, this mount pad is the cylinder of seting up the slot; the lower part of the connecting seat is also provided with a convex reinforcing sheet, and the reinforcing sheet can be fixed with the base through bolts.
2. The integrated anti-sedimentation anti-falling well cover according to claim 1, wherein the latch lock is fixed on the inner side of the cover body through a connecting sheet, the latch lock comprises a screw rod and a top pressing rod arranged on the screw rod, the screw rod passes through a fixing ring arranged on the connecting sheet and is fixed on the connecting sheet, and a spring is sleeved between the top pressing rod and the fixing ring; the connecting piece is provided with a lock hole penetrating through the cover body in front of the top pressing rod.
3. The integrated anti-sedimentation anti-falling well cover according to claim 1, wherein a clamping piece is further fixed at the connecting end of the connecting seat and the cover body, a convex edge is arranged above the boss of the base, and the clamping piece can be clamped and fixed with the convex edge.
4. The integrated sedimentation-resistant and anti-falling well cover according to claim 1, wherein the cover body can be turned up to a state of 180 degrees with the base.
5. An unlocking device of a well lid, which is used for unlocking a latch lock in the well lid according to any one of the preceding claims 1-4, and is characterized by comprising a support rod, an unlocking piece rotatably connected to the bottom of the support rod, and a rotating rod arranged on the upper part of the support rod, wherein the support rod is hollow, a push rod is inserted into the upper opening of the support rod, and the unlocking piece can be rotated by pressing the push rod.
6. The well lid unlocking device according to claim 5, wherein the middle part of the unlocking piece is connected with the lower part of the supporting rod through a rotating shaft, the unlocking piece is in a long strip shape, one side of the long strip shape is provided with two right angles, and the other side of the long strip shape is provided with an arc.
7. The unlocking device of the well lid according to claim 5, wherein the hollow part of the supporting rod is provided with internal threads, the pushing rod is provided with external threads, and the pushing rod is in threaded connection with the supporting rod; the top end of the push rod is also provided with a rotary handle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711393279.4A CN108086360B (en) | 2017-12-21 | 2017-12-21 | Integrated anti-sedimentation anti-falling well lid and unlocking device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711393279.4A CN108086360B (en) | 2017-12-21 | 2017-12-21 | Integrated anti-sedimentation anti-falling well lid and unlocking device thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108086360A CN108086360A (en) | 2018-05-29 |
| CN108086360B true CN108086360B (en) | 2023-11-10 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711393279.4A Active CN108086360B (en) | 2017-12-21 | 2017-12-21 | Integrated anti-sedimentation anti-falling well lid and unlocking device thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108086360B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113529803A (en) * | 2021-06-30 | 2021-10-22 | 盐城三山道路设施有限公司 | Intelligent well lid |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204125970U (en) * | 2014-05-29 | 2015-01-28 | 国家电网公司 | A kind of anti-stealing manhole cover |
| WO2015192405A1 (en) * | 2014-06-17 | 2015-12-23 | 田艺儿 | Fall arrest well cover having weight-bearing rods |
| CN208121817U (en) * | 2017-12-21 | 2018-11-20 | 杭州金盟道路设施有限公司 | A kind of well lid and its unlocking apparatus of integral type anti-settling fall arrest |
-
2017
- 2017-12-21 CN CN201711393279.4A patent/CN108086360B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204125970U (en) * | 2014-05-29 | 2015-01-28 | 国家电网公司 | A kind of anti-stealing manhole cover |
| WO2015192405A1 (en) * | 2014-06-17 | 2015-12-23 | 田艺儿 | Fall arrest well cover having weight-bearing rods |
| CN208121817U (en) * | 2017-12-21 | 2018-11-20 | 杭州金盟道路设施有限公司 | A kind of well lid and its unlocking apparatus of integral type anti-settling fall arrest |
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| Publication number | Publication date |
|---|---|
| CN108086360A (en) | 2018-05-29 |
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