CN114411813B - Assembled well lid assembly of drainage pipe network - Google Patents
Assembled well lid assembly of drainage pipe network Download PDFInfo
- Publication number
- CN114411813B CN114411813B CN202210005984.7A CN202210005984A CN114411813B CN 114411813 B CN114411813 B CN 114411813B CN 202210005984 A CN202210005984 A CN 202210005984A CN 114411813 B CN114411813 B CN 114411813B
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- CN
- China
- Prior art keywords
- well
- well lid
- cover body
- edge
- cover
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 32
- 238000007789 sealing Methods 0.000 claims abstract description 9
- 230000003014 reinforcing effect Effects 0.000 claims description 18
- 230000000149 penetrating effect Effects 0.000 claims 2
- 210000001503 joint Anatomy 0.000 claims 1
- 239000010865 sewage Substances 0.000 abstract description 7
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 abstract description 2
- 238000012423 maintenance Methods 0.000 abstract description 2
- 238000000465 moulding Methods 0.000 description 7
- 238000009434 installation Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 2
- 229910001141 Ductile iron Inorganic materials 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel 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
- E02D29/14—Covers for manholes or the like; Frames for covers
- E02D29/1463—Hinged connection of cover to frame
-
- 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
- E02D29/149—Annular gaskets
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 discloses a drain pipe network assembled well lid assembly, which comprises an annular well seat, wherein the well seat is connected with an outer well lid and an inner well lid, a circumferential positioning step is arranged on the well seat, the outer well lid is hinged with the well seat, the lower surface of the well seat is an annular plane, an inner well lid is arranged below the well seat, the inner well lid is hinged with the well seat through a hinge assembly, the edge of the upper surface of the inner well lid is attached to the annular plane and sealed, the inner well lid is formed by detachably splicing at least two cover body units, a sealing structure is also arranged between splicing seams of the cover body units, and the hinge assembly is detachably connected with the inner well lid and the well seat respectively. Compared with the prior art, the invention has the beneficial effects that: the inner well lid plays the sealing effect of stagnant water, prevents that sewage from overflowing, and outer well lid is used for assuming road surface driving load, prevents falling, because all spare and accessory parts all detachably equipment to allow to change arbitrary accessory, have maintenance economic nature.
Description
Technical Field
The invention belongs to the technical field of drainage pipe network auxiliary structures, and particularly relates to an assembly type well lid assembly of a drainage pipe network.
Background
With urban development and great population growth in urban areas, the running load pressure of urban drainage facilities is gradually increased, and the water level of the drainage pipe is increased year by year. In rainy seasons, drainage pipe networks often run in overload. Pressure well covers in partial low elevation areas face the challenge of too high pressure of sewage in the pipe. Particularly, the sealing performance of part of the existing pressure well covers is obviously reduced due to factors such as age, corrosion and the like, the current situation pressure well covers in the key low elevation areas are difficult to play an effective sealing role in the coming of the flood season, the problems of overflow of sewage and the like caused by overhigh sewage pressure in pipes are extremely easy to occur, the pressure of safety and environmental protection risks is obvious, and the urban drainage pressure well covers are improved unprecedentedly. The newly built urban drainage pipe network will also face the challenge of increasing the sewage pressure in the future, and the performance standard of the pressure well cover must be improved in the construction stage. In addition to the sealing properties, the pressure manhole cover also needs to meet the traffic requirements of urban main roads and port and dock freight vehicles, so that the ground bearing properties thereof also need to be particularly careful. In addition, in order to further adapt to intelligent and fine management of the pipe network, intelligent well lid equipment is further required to be installed on the pressure well lid, and the power-assisted drainage pipe network facilities run safely. The design of a novel pressure well cover is imperative.
Disclosure of Invention
In view of this, the present invention provides a drain pipe network assembled manhole cover assembly.
The technical scheme is as follows:
The assembled well cover assembly for drainage pipe network includes one annular well seat connected to outer well cover and inner well cover,
The well seat is provided with a circumferential positioning step, the positioning step is provided with the outer well cover, and the outer well cover is hinged with the well seat;
The lower surface of the well seat is an annular plane, the inner well cover is arranged below the well seat, the inner well cover is hinged with the well seat through a hinge assembly, the edge of the upper surface of the inner well cover is abutted against the annular plane, and the inner well cover is sealed with the annular plane;
the inner well cover is formed by detachably splicing at least two cover body units, and a sealing structure is also arranged between the splicing seams of the cover body units;
the hinge component is detachably connected with the inner well cover and the well seat respectively.
Compared with the prior art, the invention has the beneficial effects that: the inner well lid plays the sealing effect of stagnant water, prevents that sewage from overflowing, and outer well lid is used for assuming road surface driving load, prevents falling, because all spare and accessory parts all detachably equipment to allow to change arbitrary accessory, have maintenance economic nature.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a cross-sectional view A-A of FIG. 1;
FIG. 3 is an enlarged view of portion a of FIG. 2;
FIG. 4 is an enlarged view of portion b of FIG. 2;
FIG. 5 is a schematic cross-sectional view of a well base;
FIG. 6 is a bottom view of the outer manhole cover, without the manhole cover lock shown;
FIG. 7 is a schematic view of a well lid lock and hinge lugs disposed on an outer well lid;
FIG. 8 is a schematic structural view of a semicircular lid;
FIG. 9 is a schematic view of a square beam structure;
FIG. 10 is a cross-sectional view B-B of FIG. 9;
FIG. 11 is a bottom view of FIG. 9;
FIG. 12 is a schematic view of a first link;
FIG. 13 is a left side view of FIG. 12;
FIG. 14 is a schematic view of a second link;
FIG. 15 is a top view of FIG. 14;
FIG. 16 is a schematic view of a well lid assembly installed at a wellhead.
Detailed Description
The invention is further described below with reference to examples and figures.
As shown in fig. 1 and 2, a drain pipe network fabricated well lid assembly includes a well base 300 having a ring shape as a whole, and an outer well lid 100 and an inner well lid 200 are disposed on the well base 300, wherein the inner well lid 200 is located below the outer well lid 100. The well seat 300 is provided with a circumferential positioning step 330, the outer well lid 100 falls on the positioning step 330, and the outer well lid 100 is hinged with the well seat 300. The lower surface of the well seat 300 is an annular plane, the inner well cover 200 is arranged below the well seat 300, the inner well cover 200 is hinged with the well seat 300 through a hinge assembly 400, the edge of the upper surface of the inner well cover 200 is attached to the annular plane, the edge of the inner well cover 200 is provided with an arc-shaped water stop strip, and the arc-shaped water stop strip is at least partially clamped between the inner well cover 200 and the annular plane so as to enable the abutting surfaces of the inner well cover 200 and the annular plane to be sealed. The inner well cover 200 is formed by detachably splicing at least two cover body units, and a sealing structure is arranged between the splicing seams of the cover body units. The hinge assembly 400 is detachably connected to the manhole cover 200 and the well base 300, respectively.
As shown in fig. 3 and 5, the well base 300 includes an annular bottom plate 310, a supporting cylinder 320 is integrally formed on the upper surface of the annular bottom plate 310, the supporting cylinder 320 is disposed coaxially with the annular bottom plate 310, and the positioning step 330 is formed on the inner wall of the supporting cylinder 320.
The thickness of the support cylinder 320 is gradually reduced from bottom to top, and the inner diameter of the support cylinder 320 is gradually increased from bottom to top to form an inclined inner wall, so that the outer well cover 100 is conveniently installed.
The inner and outer edges of the annular bottom plate 310 are located inside and outside the support cylinder 320, respectively. At least two well seat fixing holes are formed in the annular bottom plate 310, and the well seat fixing holes are circumferentially distributed on the annular bottom plate 310 and are located outside the supporting cylinder 320. As shown in fig. 16, during installation, bolts are inserted into the well seat fixing holes and used for fixing the well seat with concrete at the well mouth of the pipeline.
The lower surface of the annular base plate 310 forms the annular plane, and the hinge assembly 400 is coupled thereto from below the annular base plate 310.
As shown in fig. 6 and 7, the outer manhole cover 100 comprises a disc-shaped manhole cover body, an annular edge reinforcing rib 101 is integrally formed at the edge of the lower surface of the manhole cover body for improving strength to meet the requirement of bearing capacity of road traffic, a central reinforcing rib 103 is integrally formed at the middle part of the lower surface of the manhole cover body, at least two radial reinforcing ribs 102 are connected between the central reinforcing rib 103 and the edge reinforcing rib 101, the radial reinforcing ribs 102 are arranged along the radial direction of the manhole cover body, and all the radial reinforcing ribs 102 are uniformly distributed around the central reinforcing rib 103 in a circumferential direction. The edge bead 101 falls on the positioning step 330.
As shown in fig. 7, the edge of the outer well lid 100 is provided with a hinge support lug 110 and a well lid lock 120, the hinge support lug 110 and the well lid lock 120 are respectively located at two sides of the center of the outer well lid 100, the well lid lock 120 is located below the well lid body, and a draw hook 130 is arranged on the well lid body near the well lid lock 120.
As shown in fig. 6, the lower surface of the manhole cover 100 is provided with an intelligent device installation area, and the intelligent device installation area is located between two adjacent radial reinforcing ribs.
As shown in fig. 8, in this embodiment, the cover unit is a semicircular cover 210, the inner well cover 200 includes two semicircular covers 210, the straight sides of the two semicircular covers 210 are abutted, and the two semicircular covers 210 are detachably and fixedly connected through a connecting assembly, so as to form a circular inner well cover 200.
As shown in fig. 2 to 4, the arc-shaped edge of each semicircular cover 210 is provided with the arc-shaped water stop bar, the linear edge of each semicircular cover 210 is respectively provided with the linear water stop bar, the linear water stop bar and the arc-shaped water stop bar on each semicircular cover 210 are connected to form a closed semicircular water stop ring 600, and the water stop ring 600 surrounds the edge of the semicircular cover 210. The outer side surfaces of the bottoms of the two straight water stop bars are mutually abutted and clamped between the two semicircular cover bodies 210.
Each semicircular cover 210 is detachably connected with the hinge assembly 400, and the hinge assembly 400 is close to the middle of the arc edge of the semicircular cover 210.
In this embodiment, the cross sections of the straight water stop bar and the arc water stop bar are all in a groove shape, and the straight water stop bar and the arc water stop bar are both covered on the edge of the semicircular cover 210.
Referring to fig. 4 and 9 to 11, the connection assembly includes a square beam 500 disposed above the semicircular cap 210, and the square beam 500 is disposed along a joint of the two semicircular caps 210 and detachably connected to the two semicircular caps 210, respectively.
A molding 510 is integrally formed on the surface of the square beam 500 facing the inner well lid 200, the molding 510 is arranged along the direction of the square beam 500, one long side of the molding 510 is fixedly connected with the square beam 500, the other side of the molding 510 is inserted between two linear water stop bars, so as to improve the tightness of the joint seam of the two semicircular covers 210, and the molding 510 and the straight side of the semicircular cover 210 are equal in length.
As shown in fig. 9 and 11, a weight-reducing groove 520 is formed on the surface of the square beam 500 facing away from the manhole cover 200, and the notch of the weight-reducing groove 520 faces away from the molding 510.
A row of mounting holes 540 are respectively formed at two edges of the square beam 500, each row of mounting holes 540 is distributed along the length direction of the square beam 500, and connecting holes are respectively formed on the semicircular cover body 210 corresponding to each mounting hole 540 on the square beam 500. Bolts are inserted through the corresponding set of mounting holes 540 and the corresponding set of connecting holes to connect the square beam 500 with the corresponding semicircular cover body 210.
As shown in fig. 10, the two end surfaces of the square beam 500 are respectively integrally formed with an extension part 530, the extension part 530 is connected to a part of the end surface of the square beam 500 away from the molding 510, so as to form a step with the corresponding end surface of the square beam 500, the extension part 530 falls on the upper surface of the inner edge of the annular bottom plate 310, and a strip-shaped hole is formed in the extension part 530, and a bolt is inserted into the strip-shaped hole so as to be connected with the annular bottom plate 310. The extension 530 is located above the well base 300, and the manhole cover 200 is located below the well base 300, and abuts against the annular bottom plate 310 from both sides, respectively, to achieve stable positioning.
As shown in fig. 3 and 12-15, the hinge assembly 400 includes a first link 410 and a second link 420, the first link 410 is vertically disposed, a stud is machined at an upper end of the first link 410, the stud is assembled on the annular base plate 310, a lower end of the first link 410 is hinged to one end of the second link 420, and the second link 420 is abutted against a lower surface of the corresponding semicircular cover body 210 and is connected with the lower surface by a bolt. And an avoidance gap is formed on the second chain link 420 corresponding to the arc-shaped water stop strip.
The outer well cover 100 can be made of spheroidal graphite cast iron, and the rest metal fittings can be made of stainless steel materials. The water stop ring 600 may be made of a rubber material.
FIG. 16 is a schematic view of a well lid assembly installed at a wellhead. Wherein the inner well lid is sealed, mainly used prevents sewage overflow, and the square beam is as main pressure-bearing member. The outer well lid is used for bearing road surface driving load and preventing falling. All parts are detachably assembled, so that any part can be replaced, and the economy is met. In addition, the installation position of the intelligent equipment is reserved, so that the follow-up intelligent upgrade is facilitated.
Finally, it should be noted that the above description is only a preferred embodiment of the present invention, and that many similar changes can be made by those skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (3)
1. The utility model provides a drainage pipe network assembled well lid subassembly, is annular well seat (300) including wholly, this well seat (300) are connected with outer well lid (100) and interior well lid (200), its characterized in that:
The well seat (300) is provided with a circumferential positioning step (330), the positioning step (330) is provided with the outer well cover (100), and the outer well cover (100) is hinged with the well seat (300);
the lower surface of the well seat (300) is an annular plane, the inner well cover (200) is arranged below the well seat (300), the inner well cover (200) is hinged with the well seat (300) through a hinge assembly (400), the edge of the upper surface of the inner well cover (200) is abutted against the annular plane, and the inner well cover (200) is sealed with the annular plane;
the inner well cover (200) is formed by detachably splicing two cover body units, and a sealing structure is also arranged between the splicing seams of the cover body units;
The hinge assembly (400) is detachably connected with the inner well cover (200) and the well seat (300) respectively;
The well seat (300) comprises an annular bottom plate (310), a supporting cylinder (320) is integrally formed on the upper surface of the annular bottom plate (310), the supporting cylinder (320) and the annular bottom plate (310) are arranged on the same axis, and the positioning step (330) is formed on the inner wall of the supporting cylinder (320);
The inner edge and the outer edge of the annular bottom plate (310) are respectively positioned at the inner side and the outer side of the supporting cylinder (320);
At least two well seat fixing holes are formed in the annular bottom plate (310), are distributed on the annular bottom plate (310) in a circumferential direction and are positioned outside the supporting cylinder (320);
The lower surface of the annular bottom plate (310) forms the annular plane, and the hinge assembly (400) is connected with the annular bottom plate (310) from the lower part of the annular bottom plate;
The cover body unit is a semicircular cover body (210), the inner well cover (200) comprises two semicircular cover bodies (210), straight edges of the two semicircular cover bodies (210) are in butt joint, and the two semicircular cover bodies (210) are detachably and fixedly connected through a connecting assembly, so that the inner well cover (200) is spliced into a circular shape;
The arc-shaped edge of each semicircular cover body (210) is provided with an arc-shaped water stop bar, the linear edge of each semicircular cover body (210) is respectively provided with a linear water stop bar, the linear water stop bars on each semicircular cover body (210) are connected with the arc-shaped water stop bars to form a closed semicircular water stop ring (600), and the water stop ring (600) wraps the edge of the semicircular cover body (210);
the outer side surfaces of the bottoms of the two linear water stop bars are mutually abutted and clamped between the two semicircular cover bodies (210);
Each semicircular cover body (210) is detachably connected with the hinge assembly (400), and the hinge assembly (400) is close to the middle part of the arc-shaped edge of the semicircular cover body (210);
The cross sections of the straight water stop bar and the arc water stop bar are in a groove shape, and the straight water stop bar and the arc water stop bar are buckled and covered on the edge of the semicircular cover body (210);
The connecting assembly comprises square beams (500) arranged above the semicircular cover bodies (210), wherein the square beams (500) are arranged along splicing seams of the two semicircular cover bodies (210) and are detachably connected with the two semicircular cover bodies (210) respectively;
The hinge assembly (400) comprises a first chain link (410) and a second chain link (420), wherein the first chain link (410) is vertically arranged, a stud is machined at the upper end of the first chain link, the stud is assembled on the annular bottom plate (310), the lower end of the first chain link (410) is hinged with one end of the second chain link (420), and the second chain link (420) is abutted against the lower surface of the corresponding semicircular cover body (210) and connected with the lower surface of the semicircular cover body through a bolt;
An avoidance gap is formed on the second chain link (420) corresponding to the arc-shaped water stop strip;
A fillet (510) is integrally formed on the surface of the square beam (500) facing the inner well cover (200), the fillet (510) is arranged along the trend of the square beam (500), one long side of the fillet (510) is fixedly connected with the square beam (500), the other side of the fillet (510) is inserted between two straight water stop bars, and the fillet (510) is equal in length with the straight side of the semicircular cover body (210);
A weight-reducing groove (520) is formed in the surface, facing away from the inner well cover (200), of the square beam (500), and a notch of the weight-reducing groove (520) faces away from the embedded strip (510);
A row of mounting holes (540) are respectively formed in the two edges of the square beam (500), each row of mounting holes (540) is distributed along the length direction of the square beam (500), and bolts are arranged in each mounting hole (540) in a penetrating manner so as to be connected with the corresponding semicircular cover body (210);
The two end faces of the square beam (500) are respectively integrally formed with an extending part (530), the extending part (530) is connected to a part, away from the embedded strip (510), of the end face of the square beam (500), steps are formed between the extending part and the corresponding end face of the square beam (500), the extending part (530) falls on the upper surface of the inner edge of the annular bottom plate (310), a strip-shaped hole is formed in the extending part (530), and a bolt is arranged in the strip-shaped hole in a penetrating mode so as to be connected with the annular bottom plate (310).
2. The drainage pipe network fabricated well cover assembly of claim 1, wherein: the outer well cover (100) comprises a disc-shaped well cover body, an annular edge reinforcing rib (101) is integrally formed at the edge of the lower surface of the well cover body, a center reinforcing rib (103) is integrally formed in the middle of the lower surface of the well cover body, at least two radial reinforcing ribs (102) are connected between the center reinforcing rib (103) and the edge reinforcing rib (101), the radial reinforcing ribs (102) are arranged along the radial direction of the well cover body, and all the radial reinforcing ribs (102) are uniformly distributed around the center reinforcing rib (103) in the circumferential direction;
The edge reinforcing rib (101) falls on the positioning step (330);
The edge of outer well lid (100) is provided with hinge journal stirrup (110) and well lid lock (120), hinge journal stirrup (110) with well lid lock (120) are located respectively the centre of a circle both sides of outer well lid (100), well lid lock (120) are located well lid body below is close to well lid lock (120) are in be equipped with drag hook (130) on the well lid body.
3. The drainage pipe network fabricated well cover assembly of claim 2, wherein: the thickness of the supporting cylinder (320) is gradually reduced from bottom to top, the inner diameter of the supporting cylinder (320) is gradually increased from bottom to top to form an inclined inner wall, and the edge of the outer well cover (100) is matched with the inner wall of the supporting cylinder (320).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210005984.7A CN114411813B (en) | 2022-01-05 | 2022-01-05 | Assembled well lid assembly of drainage pipe network |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210005984.7A CN114411813B (en) | 2022-01-05 | 2022-01-05 | Assembled well lid assembly of drainage pipe network |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114411813A CN114411813A (en) | 2022-04-29 |
| CN114411813B true CN114411813B (en) | 2024-05-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210005984.7A Active CN114411813B (en) | 2022-01-05 | 2022-01-05 | Assembled well lid assembly of drainage pipe network |
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| Country | Link |
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| CN (1) | CN114411813B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204676602U (en) * | 2015-06-08 | 2015-09-30 | 合肥市规划设计研究院 | A kind of municipal manhole is mated formation well lid |
| CN209211501U (en) * | 2018-11-02 | 2019-08-06 | 南京叶庄市政建设工程新技术有限公司 | A kind of novel anti-falling falls anti-theft manhole cover |
| CN112282014A (en) * | 2020-11-11 | 2021-01-29 | 重庆市排水有限公司 | Safe sealed type drainage system |
| CN215367427U (en) * | 2021-08-02 | 2021-12-31 | 湖南东泉铸造有限公司 | Concatenation well lid |
| CN216766001U (en) * | 2022-01-05 | 2022-06-17 | 重庆市排水有限公司 | Sealing structure for inner well cover of drainage pipe net |
| CN216766000U (en) * | 2022-01-05 | 2022-06-17 | 重庆市排水有限公司 | Inner well cover assembly |
-
2022
- 2022-01-05 CN CN202210005984.7A patent/CN114411813B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204676602U (en) * | 2015-06-08 | 2015-09-30 | 合肥市规划设计研究院 | A kind of municipal manhole is mated formation well lid |
| CN209211501U (en) * | 2018-11-02 | 2019-08-06 | 南京叶庄市政建设工程新技术有限公司 | A kind of novel anti-falling falls anti-theft manhole cover |
| CN112282014A (en) * | 2020-11-11 | 2021-01-29 | 重庆市排水有限公司 | Safe sealed type drainage system |
| CN215367427U (en) * | 2021-08-02 | 2021-12-31 | 湖南东泉铸造有限公司 | Concatenation well lid |
| CN216766001U (en) * | 2022-01-05 | 2022-06-17 | 重庆市排水有限公司 | Sealing structure for inner well cover of drainage pipe net |
| CN216766000U (en) * | 2022-01-05 | 2022-06-17 | 重庆市排水有限公司 | Inner well cover assembly |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114411813A (en) | 2022-04-29 |
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