CN114075844A - Be used for municipal administration public works sewer to lead to stifled equipment - Google Patents
Be used for municipal administration public works sewer to lead to stifled equipment Download PDFInfo
- Publication number
- CN114075844A CN114075844A CN202111385448.6A CN202111385448A CN114075844A CN 114075844 A CN114075844 A CN 114075844A CN 202111385448 A CN202111385448 A CN 202111385448A CN 114075844 A CN114075844 A CN 114075844A
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- China
- Prior art keywords
- sewer
- filter disc
- groove
- embedded
- well lid
- Prior art date
- 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 17
- 230000001174 ascending effect Effects 0.000 claims description 3
- 239000012535 impurity Substances 0.000 description 17
- 230000000903 blocking effect Effects 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 230000000149 penetrating effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 238000009991 scouring Methods 0.000 description 2
- 208000032484 Accidental exposure to product Diseases 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 231100000818 accidental exposure Toxicity 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/04—Gullies inlets, road sinks, floor drains with or without odour seals or sediment traps
- E03F5/0401—Gullies for use in roads or pavements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/50—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition
- B01D29/56—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition in series connection
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F3/00—Sewer pipe-line systems
- E03F3/02—Arrangement of sewer pipe-lines or pipe-line systems
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/04—Gullies inlets, road sinks, floor drains with or without odour seals or sediment traps
- E03F5/0401—Gullies for use in roads or pavements
- E03F5/0404—Gullies for use in roads or pavements with a permanent or temporary filtering device; Filtering devices specially adapted therefor
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/04—Gullies inlets, road sinks, floor drains with or without odour seals or sediment traps
- E03F5/06—Gully gratings
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F7/00—Other installations or implements for operating sewer systems, e.g. for preventing or indicating stoppage; Emptying cesspools
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/04—Gullies inlets, road sinks, floor drains with or without odour seals or sediment traps
- E03F5/06—Gully gratings
- E03F2005/068—Gully gratings with means for enhancing water flow
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Hydrology & Water Resources (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Sewage (AREA)
Abstract
The application relates to the technical field of municipal engineering, in particular to a sewer dredging device for municipal public works, which comprises a sewer, wherein an embedded groove is arranged at the upper end of the sewer, a well cover is embedded in the embedded groove, a plurality of water leakage holes are formed in the well cover, a first filter disc is embedded in the sewer, and the water flowing speed of the first filter disc is less than that of the well cover; the lower side of the well cover is connected with a plurality of buoyancy balls through connecting rods, and the buoyancy balls are positioned above the first filter disc; be equipped with the drain on the lateral wall of sewer, the upper end of drain is located between buoyancy ball and the well lid, and the lower extreme of drain is located the below of first filter disc. The application can reduce the occurrence of potential safety hazards.
Description
Technical Field
The application relates to the technical field of municipal works, in particular to a sewer dredging and blocking device for municipal public works.
Background
At present, municipal works have numerous underground pipe networks, and a drainage network is the life line of the municipal works. The sewer and the well lid thereof can be seen on a road or in a green belt, the sewer well lid is generally made of steel or concrete, and the well lid is provided with water leakage holes.
When the rainfall is great, if the rainwater can't be in time in the sewer from the hole that leaks, then can cause the rainwater siltation on road surface, lead to the vehicle to be difficult to current, need the workman to take the rain this moment and open the well lid and carry out the drainage.
The inventor thinks that certain potential safety hazards exist when workers work in heavy rain; and when the well lid is opened the back, the sewer opening will expose, has the potential safety hazard that the pedestrian accident dropped, consequently needs to improve.
Disclosure of Invention
In order to reduce the occurrence of potential safety hazards, the application provides a sewer dredging and blocking device for municipal public works.
The application provides a be used for municipal administration public works sewer to lead to stifled equipment adopts following technical scheme: a sewer dredging and blocking device for municipal public works comprises a sewer, wherein an embedding groove is formed in the upper end of the sewer, a well cover is embedded in the embedding groove, a plurality of water leakage holes are formed in the well cover, a first filter disc is embedded in the sewer, and the water flowing speed of the first filter disc is smaller than that of the well cover; the lower side of the well cover is connected with a plurality of buoyancy balls through connecting rods, and the buoyancy balls are positioned above the first filter disc; be equipped with the drain on the lateral wall of sewer, the upper end of drain is located between buoyancy ball and the well lid, and the lower extreme of drain is located the below of first filter disc.
By adopting the technical scheme, when the rainfall is large, rainwater passes through the water leakage holes and enters the sewer, impurities in the rainwater are filtered by the first filter disc, and the filtered rainwater flows to the bottom of the sewer; the water flowing speed of the first filter disc is lower than that of the well cover, so that the rainwater level on the upper surface of the first filter disc gradually rises, the rising rainwater level promotes the buoyancy ball to rise, and the buoyancy ball drives the well cover to rise through the connecting rod and separate from the embedded groove; at the moment, rainwater on the ground can flow into the sewer through the water leakage holes and the gap between the well cover and the sewer, and the rainwater at the upper end of the drainage channel flows to the lower part of the first filter disc through the drainage channel, so that the drainage quantity of the sewer is automatically adjusted, and the operation of workers in raining is not needed; and the well lid still shields the upside in the sewer after breaking away from to inlay and establish the groove for the pedestrian is difficult for falling in the sewer, thereby has reduced the emergence of potential safety hazard.
Optionally, the same limiting ring which is embedded in the sewer in a sliding manner is arranged on all the connecting rods.
Through adopting above-mentioned technical scheme, the sliding fit of spacing ring and sewer for break away from and establish the difficult emergence of well lid in groove and rock in inlaying.
Optionally, when the well lid is embedded in the embedding groove, the limiting ring is sealed at the upper end opening of the drainage channel.
Through adopting above-mentioned technical scheme, when rainfall is less, the upper surface of first filter disc will not have the rainwater siltation, and the spacing ring will seal in the upper end opening of drain this moment for the rainwater that has impurity is difficult for following the drain and passes through, has reduced the condition emergence that impurity piles up in the drain.
Optionally, a second filter disc is embedded in one end of the drainage channel between the buoyancy ball and the well cover.
Through adopting above-mentioned technical scheme, when the drain carries out supplementary drainage, the impurity that the second filter disc will block in the rainwater enters into the drain, has reduced the condition emergence that the drain is blockked up.
Optionally, the outer wall of the limiting ring is in sliding contact with the surface of the second filter disc.
Through adopting above-mentioned technical scheme, at the slip in-process of spacing ring, the outer wall of spacing ring can strike off the impurity that adheres to on second filter disc surface, and difficult second filter disc is difficult for blockking up.
Optionally, the bottom groove wall of the embedding groove is connected with a stop block for the limit ring to ascend and collide with in a sliding manner along the horizontal direction.
Through adopting above-mentioned technical scheme, drive the well lid through the connecting rod when the buoyancy ball and break away from after inlaying and establishing the groove, the dog will block the spacing ring that rises for the well lid can't continue to rise, breaks away from in order to avoid the spacing ring from the sewer, has reduced the unexpected condition emergence that exposes of sewer opening.
Optionally, a sliding groove extending along the horizontal direction and communicated with a sewer is arranged on the bottom groove wall of the embedding groove, and the stop block is embedded in the sliding groove in a sliding manner; and two thread grooves which are sequentially arranged along the extending direction of the sliding groove are formed in the bottom groove wall of the sliding groove, and a bolt for matching the thread grooves in a threaded manner is arranged on the stop block in a penetrating manner.
By adopting the technical scheme, when the bolt penetrates through the stop block and is in threaded fit with the thread groove close to the sewer, the stop block can stop the ascending limit ring, so that the limit ring is not easy to separate from the sewer; when the bolt is arranged in a penetrating mode on the stop block and is in threaded fit with the thread groove far away from the sewer, the limiting ring can enter and exit the sewer, and the well cover is convenient to disassemble and assemble.
Optionally, the center of the first filter disc is recessed downward, and the height of the first filter disc gradually decreases from the edge to the center.
Through adopting above-mentioned technical scheme, under the scouring action of rainwater and the guide effect of first filter disc upper surface, impurity on the first filter disc will pile up the center department at first filter disc upper surface to the workman clears up impurity through the dirty pump of taking out.
To sum up, the application comprises the following beneficial technical effects:
1. when the rainfall is large, the rainwater level on the upper surface of the first filter disc gradually rises, the buoyancy ball drives the well cover to rise through the connecting rod to separate from the embedded groove and shield the upper side of the sewer, the rainwater on the ground flows into the sewer through the water leakage hole and the gap between the well cover and the sewer, and the rainwater at the upper end of the drainage channel flows to the lower part of the first filter disc through the drainage channel, so that the automatic adjustment of the drainage quantity of the sewer is realized, and the occurrence of potential safety hazards is reduced;
2. when the buoyancy ball drives the well lid to be separated from the embedded groove through the connecting rod, the stop block stops the ascending limit ring, so that the well lid cannot ascend continuously, the limit ring is prevented from being separated from the sewer, and the accidental exposure of the opening of the sewer is reduced;
3. under the scouring action of rainwater and the guiding action of first filter disc upper surface, impurity on the first filter disc will pile up the center department at first filter disc upper surface to the workman clears up impurity through taking out dirty pump.
Drawings
FIG. 1 is a schematic sectional view of the whole of an embodiment of the present application;
FIG. 2 is a schematic sectional view showing the well lid lifted in the embodiment of the present application;
fig. 3 is a partially enlarged schematic view at a in fig. 1.
Reference numerals: 1. a sewer; 11. embedding a groove; 12. a first filter disc; 13. a chute; 14. a stopper; 15. a thread groove; 16. a bolt; 2. a well cover; 21. a water leakage hole; 22. a connecting rod; 23. a buoyant ball; 24. a limiting ring; 3. a water drain; 31. a second filter disc.
Detailed Description
The present application is described in further detail below with reference to figures 1-3.
The embodiment of the application discloses a sewer dredging and blocking device for municipal public works. As shown in figure 1, a be used for municipal administration public works sewer to lead to stifled equipment, including sewer 1, the upper end of sewer 1 is equipped with inlays and establishes groove 11, inlays to establish that the groove 11 is embedded to be equipped with well lid 2, is equipped with a plurality of holes 21 that leak on well lid 2, and rainwater accessible leaks hole 21 and enters into in sewer 1.
A first filter disc 12 is embedded in the sewer 1, rainwater entering the sewer 1 is filtered by the first filter disc 12, impurities are accumulated on the upper surface of the first filter disc 12, and the filtered rainwater flows to the bottom of the sewer 1; first filter disc 12 is the setting of obconic shape, and the center undercut of first filter disc 12, the height that first filter disc 12 was located reduces gradually to the center from limit portion for impurity on the first filter disc 12 will be gathered together to the center department of first filter disc 12 upper surface, so that the workman clears up impurity through the pump of taking out dirty.
The water flowing speed of the first filter disc 12 is less than that of the well cover 2, so when the rainfall is large, a large amount of rainwater can be poured into the sewer 1 from the water leakage holes 21, the filter disc can not discharge the rainwater to the bottom of the sewer 1 in time, and the rainwater liquid level on the upper surface of the first filter disc 12 can gradually rise.
As shown in fig. 1 and 2, the downside of well lid 2 is connected with a plurality of buoyancy balls 23 through the connecting rod 22 that is vertical setting, buoyancy balls 23 are located the top of first filter disc 12, the rainwater liquid level that rises will make buoyancy balls 23 rise, buoyancy balls 23 will drive well lid 2 through connecting rod 22 and rise and break away from in inlaying and establishing groove 11, subaerial rainwater accessible leaks hole 21 and well lid 2 and the clearance between sewer 1 flow into in sewer 1 this moment, the speed that the rainwater flows into sewer 1 has been improved.
It is worth to say that be connected with same slip on all connecting rods 22 and inlay the spacing ring 24 of establishing in sewer 1, the spacing ring 24 makes well lid 2 difficult rocking in the lift process, so well lid 2 goes up and breaks away from and still shields the upside in sewer 1 after inlaying groove 11, makes the pedestrian be difficult for dropping in sewer 1 to the emergence of potential safety hazard has been reduced.
Circumference is equipped with two drain 3 that are "C" shape setting on sewer 1's the lateral wall, and the upper end of drain 3 is located between buoyancy ball 23 and the well lid 2, and the lower extreme of drain 3 is located the below of first filter disc 12, so after the rainwater liquid level of first filter disc 12 upper surface risees gradually, the rainwater that is located drain 3 upper end department will flow to the below of first filter disc 12 through drain 3, has improved the discharge velocity of rainwater.
It is worth to say that, the one end that drain 3 is located between buoyancy ball 23 and well lid 2 is embedded to be equipped with second filter disc 31, and second filter disc 31 will block off the impurity of rainwater and enter into drain 3 in, has reduced the condition emergence that drain 3 is blockked up.
As shown in fig. 1 and fig. 3, a chute 13 extending along the radial direction of the sewer 1 and communicated with the sewer 1 is circumferentially arranged on the bottom chute wall of the embedding chute 11, and a stop block 14 is embedded in the chute 13; two thread grooves 15 which are sequentially arranged along the extending direction of the sliding chute 13 are arranged on the bottom chute wall of the sliding chute 13, and a bolt 16 for matching with the thread grooves 15 in a thread way is arranged on the stop block 14 in a penetrating way.
When 16 bolts wear to locate dog 14 and screw-thread fit when being close to the thread groove 15 of sewer 1, dog 14 will block the spacing ring 24 that rises for well lid 2 can't continue to rise, breaks away from in order to avoid spacing ring 24 follow sewer 1, has reduced the unexpected condition emergence that exposes of sewer 1 opening. When the bolt 16 is arranged in the stop block 14 in a penetrating way and is in threaded fit with the thread groove 15 far away from the sewer 1, the limiting ring 24 can enter and exit the sewer 1, and the well cover 2 is convenient to disassemble and assemble.
When the rainfall is reduced, the rainwater level on the upper surface of the first filter disc 12 gradually descends to enable the buoyancy ball 23, the limiting ring 24 and the well lid 2 to gradually descend, and the well lid 2 is embedded in the embedding groove 11 to enable the opening of the sewer 1 to be closed; the stop collar 24 will descend and strike off the impurity on second filter disc 31 surface and seal in the upper end opening of two drain 3 for the rainwater that has impurity is difficult for following drain 3 and passes through, has reduced the condition emergence that impurity piles up in drain 3.
The implementation principle of the sewer dredging and blocking equipment for the municipal public works is as follows: when the rainfall is large, the rainwater will pass through the water leakage holes 21 and enter the sewer 1, the rainwater will pass through the first filter disc 12 and flow to the bottom of the sewer 1, and impurities will be accumulated at the center of the upper surface of the first filter disc 12.
Because the water passing speed of the first filter disc 12 is less than that of the well lid 2, the rainwater liquid level on the upper surface of the first filter disc 12 gradually rises, the rising rainwater liquid level promotes the buoyancy ball 23 to rise, the buoyancy ball 23 drives the well lid 2 to rise through the connecting rod 22 and separate from the embedded groove 11, and at the moment, the well lid 2 is still covered on the upper side of the sewer 1, so that pedestrians are not easy to fall into the sewer 1; rainwater on the ground can flow into the sewer 1 through the water leakage holes 21 and the gap between the well cover 2 and the sewer 1, so that the speed of the rainwater flowing into the sewer 1 is improved; the rainwater located at the upper end of the drainage channel 3 flows to the lower part of the first filter disc 12 through the drainage channel 3, so that the drainage speed of the rainwater is increased, and the potential safety hazard is reduced.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (8)
1. The utility model provides a be used for municipal administration public works sewer to lead to stifled equipment, includes sewer (1), the upper end of sewer (1) is equipped with inlays and establishes groove (11), inlays and establishes embedded well lid (2) that are equipped with in groove (11), is equipped with a plurality of holes that leak (21) on well lid (2), its characterized in that: a first filter disc (12) is embedded in the sewer (1), and the water flowing speed of the first filter disc (12) is less than that of the well cover (2); the lower side of the well lid (2) is connected with a plurality of buoyancy balls (23) through connecting rods (22), and the buoyancy balls (23) are positioned above the first filter disc (12); be equipped with drain (3) on the lateral wall of sewer (1), the upper end of drain (3) is located between buoyancy ball (23) and well lid (2), and the lower extreme of drain (3) is located the below of first filter disc (12).
2. A device for municipal utility sewer plugging according to claim 1, wherein: all the connecting rods (22) are provided with the same limiting ring (24) which is embedded in the sewer (1) in a sliding way.
3. A device for municipal utility sewer plugging according to claim 2, wherein: when the well lid (2) is embedded in the embedding groove (11), the limiting ring (24) is sealed at the upper end opening of the drainage channel (3).
4. A device for municipal utility sewer plugging according to claim 3, wherein: and a second filter disc (31) is embedded in one end of the drainage channel (3) between the buoyancy ball (23) and the well lid (2).
5. A device for municipal utility sewer plugging according to claim 4, wherein: the outer wall of the limiting ring (24) is in sliding contact with the surface of the second filter disc (31).
6. A device for municipal utility sewer plugging according to claim 2, wherein: the bottom groove wall of the embedding groove (11) is connected with a stop block (14) which is used for the ascending collision of the limit ring (24) along the horizontal direction in a sliding way.
7. A device for municipal utility sewer plugging according to claim 6, wherein: a sliding groove (13) extending along the horizontal direction and communicated with the sewer (1) is formed in the bottom groove wall of the embedding groove (11), and a stop block (14) is embedded in the sliding groove (13) in a sliding manner; two thread grooves (15) which are sequentially arranged along the extending direction of the sliding groove (13) are arranged on the bottom groove wall of the sliding groove (13), and a bolt (16) which is used for being in threaded fit with the thread grooves (15) penetrates through the stop block (14).
8. A device for municipal utility sewer plugging according to claim 1, wherein: the center of the first filter disc (12) is sunken downwards, and the height of the first filter disc (12) is gradually reduced from the edge part to the center.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111385448.6A CN114075844A (en) | 2021-11-22 | 2021-11-22 | Be used for municipal administration public works sewer to lead to stifled equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111385448.6A CN114075844A (en) | 2021-11-22 | 2021-11-22 | Be used for municipal administration public works sewer to lead to stifled equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114075844A true CN114075844A (en) | 2022-02-22 |
Family
ID=80284206
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111385448.6A Pending CN114075844A (en) | 2021-11-22 | 2021-11-22 | Be used for municipal administration public works sewer to lead to stifled equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114075844A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101320456B1 (en) * | 2013-04-09 | 2013-10-23 | 주식회사 도우엔지니어즈 | Connecting structure in sewer and manhole |
| CN205776691U (en) * | 2016-07-13 | 2016-12-07 | 南京万通城市建设设计咨询有限公司 | Safe water drain well |
| CN209556094U (en) * | 2018-12-22 | 2019-10-29 | 浙江金峨生态建设有限公司 | A kind of municipal drainage system |
| CN209989884U (en) * | 2019-05-27 | 2020-01-24 | 曹哲 | Filter screen device for water outlet of municipal building |
| CN211395905U (en) * | 2019-10-15 | 2020-09-01 | 陕西启秦建设工程有限公司 | Deodorant device of modular sewer for municipal works |
| CN214302102U (en) * | 2020-12-16 | 2021-09-28 | 安徽丰达园林工程有限公司 | A municipal road drainage structure |
| CN214461069U (en) * | 2021-01-22 | 2021-10-22 | 广东恒基隆建设有限公司 | Municipal works hidden canal prevents stifled structure |
| CN214461002U (en) * | 2020-12-05 | 2021-10-22 | 上海集塔景观建筑设计有限公司 | Road inlet for stom water structure |
-
2021
- 2021-11-22 CN CN202111385448.6A patent/CN114075844A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101320456B1 (en) * | 2013-04-09 | 2013-10-23 | 주식회사 도우엔지니어즈 | Connecting structure in sewer and manhole |
| CN205776691U (en) * | 2016-07-13 | 2016-12-07 | 南京万通城市建设设计咨询有限公司 | Safe water drain well |
| CN209556094U (en) * | 2018-12-22 | 2019-10-29 | 浙江金峨生态建设有限公司 | A kind of municipal drainage system |
| CN209989884U (en) * | 2019-05-27 | 2020-01-24 | 曹哲 | Filter screen device for water outlet of municipal building |
| CN211395905U (en) * | 2019-10-15 | 2020-09-01 | 陕西启秦建设工程有限公司 | Deodorant device of modular sewer for municipal works |
| CN214461002U (en) * | 2020-12-05 | 2021-10-22 | 上海集塔景观建筑设计有限公司 | Road inlet for stom water structure |
| CN214302102U (en) * | 2020-12-16 | 2021-09-28 | 安徽丰达园林工程有限公司 | A municipal road drainage structure |
| CN214461069U (en) * | 2021-01-22 | 2021-10-22 | 广东恒基隆建设有限公司 | Municipal works hidden canal prevents stifled structure |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20220222 |
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| RJ01 | Rejection of invention patent application after publication |