CN104895116A - Fall-protection well lid installation structure of inspection well - Google Patents
Fall-protection well lid installation structure of inspection well Download PDFInfo
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- CN104895116A CN104895116A CN201510378589.3A CN201510378589A CN104895116A CN 104895116 A CN104895116 A CN 104895116A CN 201510378589 A CN201510378589 A CN 201510378589A CN 104895116 A CN104895116 A CN 104895116A
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Abstract
The invention provides a fall-protection well lid installation structure of an inspection well, and belongs to the technical field of a fixed building, and solves the problem of the fall-protection well lid installation structure of the existing inspection well that the fall-protection well lid is likely to carry away when in internal flooding and is in failure. The fall-protection well lid installation structure of the inspection well comprises a cylindrical well lid seat and a disc-shaped fall-protection well lid, wherein the well lid seat can sleeve a well tube of the inspection well, the inner wall of the well lid seat is provided with a convex limiting barrier edge, the fall-protection well lid is arranged in the well lid seat, the bottom of the fall-protection well lid pushes against the limiting barrier edge, the upper end part of the well lid seat is provided with at least two limiting convex edges which are protruded inwards out of the well lid seat, the fall-protection well lid is provided with abdiction notches corresponding to the position and shape of the limiting convex edges, and the lower end surface of the limiting convex edge is higher than the upper end surface of the fall-protection well lid or leveled to the upper end surface of the fall-protection well lid. By adopting the fall-protection well lid installation structure, the danger that pedestrians fall into the inspection well when the well lid is lost can be prevented, and the safety of the inspection well can be improved.
Description
Technical field
The invention belongs to technical field of fixed buildings, relate to a kind of manhole, particularly a kind of dropproof well lid mounting structure of manhole.
Background technology
Manhole is the maintenance such as power supply, feedwater, draining, blowdown, communication, cable television, gas pipe, public lighting circuit of Urban Underground infrastructure and easy for installation and arrange.Lay due to pipeline and need, manhole can be positioned on the road surface of size road, and manhole well head goes out to arrange well lid, and manhole is closed by well lid, prevents pedestrian to be strayed into or in accidental fall well.When needing to overhaul the pipeline in manhole or equipment, open well lid, inspection personnel is gone into the well and overhauls or overhauled by special tool.
Due to well lid damage, stolen or be flushed away when waterlogging, cause well lid to lose the effect of protection pedestrian.In order to improve the safety of manhole, the material reduction well lid by reinforcing well lid, improvement well lid in industry damages, possibility that is stolen or that be flushed away when waterlogging, but effect is not remarkable.Therefore, occurred preventing personnel from falling into solution in well by arranging the anti-well lid that falls.
Such as, Chinese patent [application number 201320680260.9; Authorization Notice No. CN203531120U] disclosed a kind of dropproof catch-basin, by well bore, recessed edge, internal projecting ring, main shaft lid, auxiliary shaft lid form, and recessed edge is positioned at well head place, and internal projecting ring is positioned on well bore, and main shaft lid is positioned over recessed along upper, and auxiliary shaft lid is positioned on internal projecting ring.This dropproof catch-basin Problems existing is, auxiliary shaft lid is positioned over internal projecting ring, and auxiliary shaft lid is easily flushed away when waterlogging and lost efficacy.
Summary of the invention
The object of the invention is to there are the problems referred to above for existing technology, propose a kind of dropproof well lid mounting structure of manhole, the technical problem that the present invention solves how to avoid well lid to lose to cause the accident in the careless back drop of pedestrian to occur.
Object of the present invention realizes by following technical proposal: a kind of dropproof well lid mounting structure of manhole, it is characterized in that, this dropproof well lid mounting structure comprises tubular manhole cover base and falls well lid in the anti-of plate-like, described manhole cover base can be socketed on the pit shaft of manhole, described manhole cover base inwall has outstanding limiting block edge, the described anti-well lid that falls to be placed in manhole cover base and anti-bottom of falling well lid is resisted against above-mentioned limiting block along upper, described manhole cover base upper end has the limit convex edge that at least two are inwardly given prominence to manhole cover base, described anti-falling well lid has recess of stepping down one to one along position and shape with above-mentioned limit convex, and described limit convex along lower surface higher than described anti-upper surface of falling well lid or concordant with anti-upper surface of falling well lid.
The dropproof well lid mounting structure of this manhole will prevent that falling well lid is installed in manhole by manhole cover base, during installation, first manhole cover base is socketed on the pit shaft of manhole, again the anti-recess of stepping down falling well lid is aimed at the limit convex edge on manhole cover base, and the anti-well lid that falls is loaded in manhole cover base, anti-bottom of falling well lid is made to be resisted against limiting block along upper, then circumference is rotated and is prevented falling well lid, the anti-edge falling well lid is made to snap in limit convex edge, thus spacing to preventing falling the carrying out of well lid, prevent falling well lid and depart from manhole cover base.Cause danger under the careless back drop of pedestrian after the dropproof well lid mounting structure of this manhole can prevent well lid from losing, in manhole installation and maintenance process, only need circumference to rotate and anti-ly fall well lid, can make anti-ly to fall well lid and be separated with manhole cover base, the anti-easy accessibility falling well lid.Further, such structure can be applicable to existing manhole, and versatility is good, may be used for the transformation to existing manhole equipment, and the safety of manhole is improved.
In the dropproof well lid mounting structure of above-mentioned manhole, described anti-falling in well lid has several cross bars and several vertical poles, and described cross bar and vertical pole are staggered to form several be latticed and run through the through hole preventing falling well lid.When the excessive formation waterlogging of the pipeline flow under manhole, the sewage poured in down a chimney can be overflowed by through through hole, decreases hydraulic pressure to the anti-active force falling well lid, avoids preventing that falling well lid is flushed away.
In the dropproof well lid mounting structure of above-mentioned manhole, described cross bar upper end has the convex edge one extended to both sides, and described vertical pole upper end has the convex edge two extended to both sides.The intensity that improve cross bar and vertical pole by arranging convex edge one and convex edge two; Two is make anti-upper end of falling well lid larger with the position contact surface of human contact, avoids the personnel Shi Yufang that drops to fall the scratch that well lid shock causes health; Three is that the position of convex edge one and convex edge two makes that anti-to fall well lid demoulding in forming process easier.
In the dropproof well lid mounting structure of above-mentioned manhole, described anti-falling in well lid has along the anti-reinforced wall of falling well lid inside wall circumference and arranging, and described reinforced wall and anti-falling between well lid inside wall have gap.Make to prevent falling well lid lighter in weight while raising prevents falling well lid intensity by arranging reinforced wall.
As preferably, in the dropproof well lid mounting structure of above-mentioned manhole, the described anti-well lid that falls has several locating holes just right along position with limiting block, describedly prevents that falling well lid is located by screw.When preventing that falling well lid installs, first anti-will fall well lid and be placed in restraining position, then be screwed into screw in locating hole, anti-will fall well lid by screw and be fixed on manhole cover base.
As further preferably, in the dropproof well lid mounting structure of above-mentioned manhole, described reinforced wall and anti-falling between well lid inside wall have several reinforcing props, and described locating hole runs through above-mentioned reinforcing prop.The anti-well lid that falls is when fixing, and screw, through the locating hole in reinforcing prop, plays guiding and positioning action by the inwall of locating hole to screw, makes anti-location of falling well lid more reliable.
In the dropproof well lid mounting structure of above-mentioned manhole, described limit convex is along the upper surface exceeding described manhole cover base, and described anti-upper surface of falling well lid is concordant with the upper surface of manhole cover base.Make dropproof well lid mounting structure more compact.
In the dropproof well lid mounting structure of above-mentioned manhole, described limiting block edge and limit convex are along around manhole cover base inwall one week, and each described limit convex is connected along corresponding position along one end with limiting block, the other end is opening, described limit convex edge has against muscle with limiting block along the one end be connected, described against muscle along the parallel axial distribution with manhole cover base, and described one end against muscle is connected with limit convex edge, the other end and limiting block edge are connected, and identical with the width on limit convex edge against the width of muscle.During installation, anti-falling after well lid circumference is rotated is resisted against against on muscle, rotates play position-limiting action to anti-circumference of falling well lid.
In the dropproof well lid mounting structure of above-mentioned manhole, described manhole cover base is arranged with back-up ring, described back-up ring comprises circle body and lower circle body, described lower circle body has the connecting cylinder one matched with manhole cover base mouth female with the overlap joint for being connected with lower circle body, described upper circle body has and the overlap joint male mouth of overlap joint that coordinates of female mouth and the connecting cylinder two for installation check well well lid, describedly prevents that falling well lid is positioned at the position corresponding with connecting cylinder one.Back-up ring is split-type structural, manhole cover base, anti-fall well lid, upper circle body and lower circle body and can transport separately, and easy to assembly, after installing, prevent that falling well lid is positioned at the position corresponding with connecting cylinder one, the personnel be more conducive under back drop save oneself or accept rescue.
In the dropproof well lid mounting structure of above-mentioned manhole, between described lower circle body and manhole cover base, the sealing ring corresponding with connecting cylinder one shape is set.Improve the sealing performance of back-up ring and manhole cover base junction.
Compared with prior art, the advantage of the dropproof well lid mounting structure of this manhole is:
1, the dropproof well lid mounting structure of this manhole is by manhole cover base by preventing that falling well lid is installed on the pit shaft of manhole, causes danger, improve the safety of manhole after can preventing well lid from losing under the careless back drop of pedestrian.
2, the dropproof well lid mounting structure of this manhole manhole cover base and anti-fall well lid by limiting block edge and limit convex along spacing, in manhole installation and maintenance process, only need circumference to rotate and anti-ly fall well lid, can make anti-ly to fall well lid and be separated with manhole cover base, the anti-easy accessibility falling well lid.
3, the dropproof well lid mounting structure of this manhole is suitable for the transformation to existing manhole equipment, and versatility is better.
Accompanying drawing explanation
Fig. 1 is the scheme of installation of the dropproof well lid mounting structure of this manhole.
Fig. 2 is the installation top view of the dropproof well lid mounting structure of this manhole.
Fig. 3 is A-A place sectional structure schematic diagram in Fig. 2.
Fig. 4 is the partial enlarged drawing at B place in Fig. 3.
Fig. 5 is the partial enlarged drawing at C place in Fig. 3.
Fig. 6 is manhole cover base and the anti-mounting structure schematic diagram falling well lid in the dropproof well lid mounting structure of this manhole.
Fig. 7 is manhole cover base and the anti-mounting structure schematic diagram fallen under the spacing state of well lid in the dropproof well lid mounting structure of this manhole.
Fig. 8 is the anti-structural representation falling well lid in the dropproof well lid mounting structure of this manhole.
Fig. 9 is the structural representation of manhole cover base in the dropproof well lid mounting structure of this manhole.
In figure, 1, pit shaft; 2, manhole cover base; 21, limiting block edge; 22, limit convex edge; 23, opening; 24, against muscle; 3, prevent falling well lid; 31, to step down recess; 32, cross bar; 321, convex edge one; 33, vertical pole; 331, convex edge two; 34, through hole; 35, reinforced wall; 36; Locating hole; 37, reinforcing prop; 4, back-up ring; 41, upper circle body; 411, connecting cylinder two; 412, public mouth is overlapped; 42, lower circle body; 421, connecting cylinder one; 422, female mouth is overlapped; 5, sealing ring.
Detailed description of the invention
Be below specific embodiments of the invention and by reference to the accompanying drawings, technical scheme of the present invention is further described, but the present invention be not limited to these embodiments.
The dropproof well lid mounting structure of this manhole comprise manhole cover base 2, limiting block along 21, limit convex along 22, anti-ly fall well lid 3 and recess 31 of stepping down.
Specifically, as shown in Figure 1, manhole cover base 2 is socketed on the pit shaft 1 of manhole, and the anti-well lid 3 that falls to be arranged in manhole cover base 2 and to locate with manhole cover base 2.As shown in Figure 8, the anti-well lid 3 that falls is in plate-like, and anti-falling in well lid 3 has several cross bars 32 and several vertical poles 33, and cross bar 32 and vertical pole 33 are staggered to form several be latticed and run through the through hole 34 preventing falling well lid 3.Cross bar 32 upper end has the convex edge 1 extended to both sides, and vertical pole 33 upper end has the convex edge 2 331 extended to both sides.Anti-falling in well lid 3 has along the anti-reinforced wall 35 of falling well lid 3 inside wall circumference and arranging, and reinforced wall 35 and anti-falling between well lid 3 inside wall have gap, by arranging reinforced wall 35.
Anti-fall well lid 3 cross bar 32 and vertical pole 33 on there is convex edge 1 and convex edge 2 331 respectively, anti-falling on well lid 3 also has reinforced wall 35, improves the intensity of cross bar 32 and vertical pole 33, makes anti-ly to fall well lid 3 and can bear larger gravity and instantaneous impact.Further, convex edge 1 and convex edge 2 331 increase anti-falls the upper end of well lid 3 and the position contact surface of human contact, avoids the personnel Shi Yufang that drops to fall the scratch that well lid 3 shock causes health, has ensured the personal safety of unexpected personnel to fall into well.In addition, it is easier that this spline structure anti-falls well lid 3 demoulding in forming process, and anti-deadweight of falling well lid 3 is less, reduces cost of production.
As shown in Figure 9, manhole cover base 2 is in tubular, and manhole cover base 2 inwall has outstanding limiting block along 21, and in the present embodiment, manhole cover base 2 upper end has two limit convexes inwardly giving prominence to manhole cover base 2 along 22, and limit convex exceeds the upper surface of manhole cover base 2 along 22.In the production and manufacture process of reality, limit convex can also be two or more along 22 quantity.
As shown in Figure 2, Figure 3 and Figure 4, the anti-well lid 3 that falls is when being installed in manhole cover base 2, and anti-bottom of falling well lid 3 is resisted against limiting block along on 21, the upper surface that limit convex falls well lid 3 along 22 lower surfaces higher than anti-or concordant with anti-upper surface of falling well lid 3.As shown in Figure 6 and Figure 7, anti-falling well lid 3 has limit convex and to step down one to one along 22 positions and shape recess 31.Step down recess 31 and corresponding limit convex along 22 positions just pair time, anti-will fall well lid 3 and load in manhole cover base 2, make anti-upper surface of falling well lid 3 concordant with the upper surface of manhole cover base 2, circumference is rotated the anti-well lid 3 that falls and is made to prevent that falling well lid 3 snaps in limit convex along in 22.Prevent that falling well lid 3 moves upward by limit convex along 22 restrictions, avoid preventing that falling well lid 3 departs from manhole cover base 2.
As shown in Figure 9, in the present embodiment, limiting block is separated into two section by two limit convexes along 22 along 21, two sections of limiting blocks along 21 and two limit convexes spaced apart along 22.Limiting block along 21 and limit convex end to end around manhole cover base 2 inwall one week along 22 projections at grade, in molding process, avoid limiting block to block mould along 21 and limit convex along 22 location overlaps and cause demoulding difficulty.Each limit convex is connected along 21 along 22 one end with corresponding limiting block, limit convex has against muscle 24 with limiting block along one end that 21 are connected along 22, against muscle 24 along the axial distribution being parallel to manhole cover base 2, upper end against muscle 24 is connected along 22 with limit convex, lower end is connected along 21 with limiting block, and identical along the width of 22 with limit convex against the width of muscle 24.During installation, anti-falling after well lid 3 circumference is rotated is resisted against against on muscle 24, rotates play position-limiting action to anti-circumference of falling well lid 3.Limit convex is opening 23 along the other end of 22, and two limit convexes are corresponding with the anti-circumferential direction of rotating of well lid 3 of falling along the opening 23 of 22.
Preferably, as shown in Figure 6 and Figure 7, the anti-well lid 3 that falls has several locating holes 36 just right along 21 positions with limiting block, prevents that falling well lid 3 is located by screw.When preventing that falling well lid 3 installs, first anti-will fall well lid 3 and be placed in restraining position, then be screwed into screw in locating hole 36, anti-will fall well lid 3 by screw and be fixed on manhole cover base 2.As preferred further, reinforced wall 35 and anti-falling between well lid 3 inside wall have several reinforcing props 37, and locating hole 36 runs through reinforcing prop 37.The anti-well lid 3 that falls is when fixing, and screw, through the locating hole 36 in reinforcing prop 37, plays guiding and positioning action by the inwall of locating hole 36 to screw, makes anti-location of falling well lid 3 more reliable.
As shown in Fig. 3, Fig. 4 and Fig. 5, manhole cover base 2 is arranged with back-up ring 4, back-up ring 4 comprises circle body 41 and lower circle body 42, lower circle body 42 has the connecting cylinder 1 matched with manhole cover base 2 mouth 422 female with the overlap joint for being connected with lower circle body 42, upper circle body 41 has the male mouth 412 of overlap joint and the connecting cylinder 2 411 for installation check well well lid that coordinate with the female mouth 422 of overlap joint, prevents that falling well lid 3 is positioned at the position corresponding with connecting cylinder 1.Between lower circle body 42 and manhole cover base 2, the sealing ring 5 corresponding with connecting cylinder 1 shape is set, improves the sealing performance of back-up ring 4 and manhole cover base 2 junction.Back-up ring 4 is split-type structural, manhole cover base 2, anti-fall well lid 3, upper circle body 41, lower circle body 42 and sealing ring 5 and can transport separately, and it is easy to assembly, after installing, prevent that falling well lid 3 is positioned at the position corresponding with connecting cylinder 1, the personnel be more conducive under back drop save oneself or receive rescue.
The mounting means of the dropproof well lid mounting structure of this manhole is: be first socketed on the pit shaft 1 of manhole by manhole cover base 2, again the anti-recess 31 of stepping down falling well lid 3 is aimed at limit convex on manhole cover base 2 along 22, and will prevent that falling well lid 3 loads in manhole cover base 2, as shown in Figure 6, anti-bottom of falling well lid 3 is made to be resisted against limiting block along on 21, then circumference is rotated and is prevented falling well lid 3, the anti-edge falling well lid 3 is made to snap in limit convex along in 22, as shown in Figure 7, thus spacing to preventing falling the carrying out of well lid 3, prevent falling well lid 3 and depart from manhole cover base 2.Cause danger under the careless back drop of pedestrian after the dropproof well lid mounting structure of this manhole can prevent well lid from losing.When under manhole, pipeline flow is excessive, the sewage poured in down a chimney can be overflowed by through through hole 34, decreases hydraulic pressure to the anti-active force falling well lid 3, avoids preventing that falling well lid 3 is flushed away.
Specific embodiment described herein is only to the explanation for example of the present invention's spirit.Those skilled in the art can make various amendment or supplement or adopt similar mode to substitute to described specific embodiment, but can't depart from spirit of the present invention or surmount the scope that appended claims defines.
Although more employ herein pit shaft 1, manhole cover base 2, limiting block along 21, limit convex along 22, opening 23, against muscle 24, anti-ly fall well lid 3, recess 31 of stepping down, cross bar 32, convex edge 1, vertical pole 33, convex edge 2 331, through hole 34, reinforced wall 35, locating hole 36; Reinforcing prop 37, back-up ring 4, upper circle body 41, connecting cylinder 2 411, overlap male mouth 412, lower circle body 42, connecting cylinder 1, overlap the terms such as female mouth 422, sealing ring 5, but do not get rid of the possibility using other term.These terms are used to be only used to describe and explain essence of the present invention more easily; The restriction that they are construed to any one additional is all contrary with spirit of the present invention.
Claims (10)
1. the dropproof well lid mounting structure of a manhole, it is characterized in that, this dropproof well lid mounting structure comprises tubular manhole cover base (2) and falls well lid (3) in the anti-of plate-like, described manhole cover base (2) can be socketed on the pit shaft (1) of manhole, described manhole cover base (2) inwall has outstanding limiting block along (21), the described anti-well lid (3) that falls to be placed in manhole cover base (2) and anti-bottom of falling well lid (3) is resisted against above-mentioned limiting block on (21), described manhole cover base (2) upper end has at least two and inwardly gives prominence to the limit convex of manhole cover base (2) along (22), described anti-falling well lid (3) has recess (31) of stepping down one to one along (22) position and shape with above-mentioned limit convex, and described limit convex along (22) lower surface higher than described anti-upper surface of falling well lid (3) or concordant with anti-upper surface of falling well lid (3).
2. the dropproof well lid mounting structure of manhole according to claim 1, it is characterized in that, described anti-falling in well lid (3) has several cross bars (32) and several vertical poles (33), and described cross bar (32) and vertical pole (33) are staggered to form several to be latticed and to run through the through hole (34) preventing falling well lid (3).
3. the dropproof well lid mounting structure of manhole according to claim 2, it is characterized in that, described cross bar (32) upper end has the convex edge one (321) extended to both sides, and described vertical pole (33) upper end has the convex edge two (331) extended to both sides.
4. the dropproof well lid mounting structure of the manhole according to claim 1 or 2 or 3, it is characterized in that, described anti-falling in well lid (3) has along the anti-reinforced wall (35) of falling well lid (3) inside wall circumference and arranging, and described reinforced wall (35) and anti-falling between well lid (3) inside wall have gap.
5. the dropproof well lid mounting structure of manhole according to claim 4, it is characterized in that, the described anti-well lid (3) that falls has several locating holes (36) just right along (21) position with limiting block, describedly prevents that falling well lid (3) is located by screw.
6. the dropproof well lid mounting structure of manhole according to claim 5, it is characterized in that, described reinforced wall (35) and anti-falling between well lid (3) inside wall have several reinforcing props (37), and described locating hole (36) runs through above-mentioned reinforcing prop (37).
7. the dropproof well lid mounting structure of the manhole according to claim 1 or 2 or 3, it is characterized in that, described limit convex exceeds the upper surface of described manhole cover base (2) along (22), and described anti-upper surface of falling well lid (3) is concordant with the upper surface of manhole cover base (2).
8. the dropproof well lid mounting structure of the manhole according to claim 1 or 2 or 3, it is characterized in that, described limiting block along (21) and limit convex edge (22) around manhole cover base (2) inwall one week, and each described limit convex is connected along (21) corresponding position along (22) one end with limiting block, the other end is opening (23), one end that described limit convex is connected along (22) and limiting block along (21) has against muscle (24), described against muscle (24) along the parallel axial distribution with manhole cover base (2), described one end against muscle (24) is connected along (22) with limit convex, the other end is connected along (21) with limiting block, and it is identical along the width of (22) with limit convex against the width of muscle (24).
9. the dropproof well lid mounting structure of the manhole according to claim 1 or 2 or 3, it is characterized in that, described manhole cover base (2) is arranged with back-up ring (4), described back-up ring (4) comprises circle body (41) and lower circle body (42), described lower circle body (42) has the connecting cylinder one (421) matched with manhole cover base (2) mouth (422) female with the overlap joint for being connected with lower circle body (42), described upper circle body (41) has and overlap joint female mouth (422) the male mouth of overlap joint (412) that coordinates and the connecting cylinder two (411) for installation check well well lid, describedly anti-fall well lid (3) and be positioned at the position corresponding with connecting cylinder one (421).
10. the dropproof well lid mounting structure of manhole according to claim 9, it is characterized in that, between described lower circle body (42) and manhole cover base (2), the sealing ring (5) corresponding with connecting cylinder one (421) shape is set.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510378589.3A CN104895116B (en) | 2015-06-30 | 2015-06-30 | A kind of dropproof well lid mounting structure of inspection shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510378589.3A CN104895116B (en) | 2015-06-30 | 2015-06-30 | A kind of dropproof well lid mounting structure of inspection shaft |
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| Publication Number | Publication Date |
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| CN104895116A true CN104895116A (en) | 2015-09-09 |
| CN104895116B CN104895116B (en) | 2016-07-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510378589.3A Active CN104895116B (en) | 2015-06-30 | 2015-06-30 | A kind of dropproof well lid mounting structure of inspection shaft |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110438863A (en) * | 2019-08-20 | 2019-11-12 | 中冶天工集团有限公司 | A kind of device, production method and the construction method dropproof for road cavity |
| CN110438863B (en) * | 2019-08-20 | 2024-06-07 | 中冶天工集团有限公司 | Device for preventing road cavity from falling, manufacturing method and construction method |
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| JPH09137462A (en) * | 1995-11-15 | 1997-05-27 | Miyama Kogyo Kk | Manhole cover receive frame provided with inner cover |
| CN2665218Y (en) * | 2003-12-18 | 2004-12-22 | 袁如顺 | Catch pit cover made by composite materials |
| CN2903186Y (en) * | 2005-07-19 | 2007-05-23 | 和特股份有限公司 | Antitheft tripping proof natural controlling manhole cover seat apparatus |
| CN102322076A (en) * | 2011-06-17 | 2012-01-18 | 浙江天井塑业有限公司 | Check ring combination for road manhole and steel support ring for installing check ring combination |
| CN203361203U (en) * | 2013-06-26 | 2013-12-25 | 徐水县华光市政建材有限公司 | Concrete well lid support, inspection well inner well lid and inspection well concrete well lid assembly |
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2015
- 2015-06-30 CN CN201510378589.3A patent/CN104895116B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09137462A (en) * | 1995-11-15 | 1997-05-27 | Miyama Kogyo Kk | Manhole cover receive frame provided with inner cover |
| CN2665218Y (en) * | 2003-12-18 | 2004-12-22 | 袁如顺 | Catch pit cover made by composite materials |
| CN2903186Y (en) * | 2005-07-19 | 2007-05-23 | 和特股份有限公司 | Antitheft tripping proof natural controlling manhole cover seat apparatus |
| CN102322076A (en) * | 2011-06-17 | 2012-01-18 | 浙江天井塑业有限公司 | Check ring combination for road manhole and steel support ring for installing check ring combination |
| CN203361203U (en) * | 2013-06-26 | 2013-12-25 | 徐水县华光市政建材有限公司 | Concrete well lid support, inspection well inner well lid and inspection well concrete well lid assembly |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110438863A (en) * | 2019-08-20 | 2019-11-12 | 中冶天工集团有限公司 | A kind of device, production method and the construction method dropproof for road cavity |
| CN110438863B (en) * | 2019-08-20 | 2024-06-07 | 中冶天工集团有限公司 | Device for preventing road cavity from falling, manufacturing method and construction method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104895116B (en) | 2016-07-27 |
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