CN114351838A - Sewer cover plate capable of relieving blockage - Google Patents
Sewer cover plate capable of relieving blockage Download PDFInfo
- Publication number
- CN114351838A CN114351838A CN202210036793.7A CN202210036793A CN114351838A CN 114351838 A CN114351838 A CN 114351838A CN 202210036793 A CN202210036793 A CN 202210036793A CN 114351838 A CN114351838 A CN 114351838A
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- cover plate
- upper cover
- drainage
- sewer
- steering
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 102
- 230000000903 blocking effect Effects 0.000 claims abstract description 44
- 238000007789 sealing Methods 0.000 claims abstract description 4
- 239000002184 metal Substances 0.000 claims description 12
- 230000006978 adaptation Effects 0.000 claims description 2
- 238000004140 cleaning Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 4
- 238000007599 discharging Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The invention provides a sewer cover plate capable of relieving blockage, which comprises an upper cover plate, wherein the upper cover plate is respectively provided with a left drainage area and a right drainage area, the left drainage area is provided with a plurality of left drainage ports, the right drainage area is provided with a plurality of right drainage ports, the upper cover plate is provided with a flow blocking structure for sealing the left drainage ports or the right drainage ports, the flow blocking structure adopts a warped plate type flow blocking structure, the flow blocking structure comprises a blocking valve piece and a steering piece for rotating the blocking valve piece, the steering piece is arranged in the middle of the bottom surface of the upper cover plate and arranged between the left drainage area and the right drainage area, the steering piece comprises a positioning block, a rotating shaft, a shaft sleeve and a steering rod, the rotating shaft penetrates through the shaft sleeve, two ends of the rotating shaft are connected with the bottom surface of the upper cover plate through the positioning block, and the left side and the right side of the shaft sleeve are respectively connected with the blocking valve piece through the steering rod; the invention can reduce the garbage covering and blocking the upper cover plate, can greatly reduce the possibility of complete failure of the water outlet, and enables the sewer cover plate to normally realize water drainage without opening the sewer cover plate for garbage cleaning.
Description
Technical Field
The invention relates to a sewer cover plate capable of relieving blockage.
Background
The sewer cover plate is an indispensable part in urban construction, and is used for keeping the drainage function and leveling the ground, and simultaneously preventing garbage from entering a drainage ditch to cause blockage. For the drainage ditch cover plate which needs to be used in a large area, the drainage ditch cover plate has the characteristics of good quality, low cost, simple structure, low maintenance cost, mass production and the like. However, the existing drainage ditch cover plate is a single metal or rubber cast partition plate, and once the precipitation is too large, the garbage brought by water flow easily causes the drainage hole of the cover plate to be blocked and the drainage function is lost.
Aiming at the problem that garbage is easy to block due to water flow, the Chinese patent CN201710547970.7 discloses a sewer cover plate, which comprises an upper cover plate and a lower cover plate, wherein the upper cover plate comprises an upper layer plate and a lower layer plate, a support plate is arranged between the upper layer plate and the lower layer plate, and an L-shaped baffle is arranged on the lower layer plate and opposite to the inner side of a water leakage hole B. The L type baffle through the upper cover plate can block abandonment impurity in the above-mentioned patent, and does not influence the effect that the upper cover plate leaked, and one side of using the L type baffle after a period of time gathers a large amount of debris, need shift out the upper cover plate, takes out debris. This patent need clear up debris under the upper cover plate, otherwise still cause debris to pile up the jam and influence smooth drainage easily.
At present, various cover plates are mostly arranged on the size of the drain hole, and once the cover plates meet the conditions of large rainfall such as flood, heavy rain and the like, water flow easily rolls various garbage to the drain hole to cause blockage, so that the drainage performance is influenced, and even the function of the drain outlet is failed. However, heretofore, there has not been seen a drain cover plate which makes the cover plate self-cleaning when clogged with garbage by utilizing the impact force of water flow to reduce the possibility of clogging, and which is put into practical production.
The above problems are problems that should be considered and solved in the design and production process of the sewer cover plate.
Disclosure of Invention
The invention aims to provide a sewer cover plate capable of relieving blockage, and solves the problem that in the prior art, after the sewer cover plate is blocked by garbage such as plastic bags and tree leaves when the precipitation is large, the drainage performance is influenced, and even the function of a drainage outlet is invalid.
The technical solution of the invention is as follows:
the utility model provides a can alleviate sewer apron of jam, including the upper cover plate, the upper cover plate is equipped with left drainage zone and right drainage zone respectively, left drainage zone is equipped with a plurality of left outlet ports, right drainage zone is equipped with a plurality of right outlet ports, the upper cover plate is equipped with the choked flow structure that is used for sealing left outlet port or right outlet port, the choked flow structure adopts wane formula choked flow structure, the choked flow structure is including blockking up the valve member and being used for rotating the steering member that blocks up the valve member, the bottom surface middle part of upper cover plate is equipped with the steering member, and the steering member is located between left drainage zone and right drainage zone, the steering member includes the locating piece, the apparatus further comprises a rotating shaft, axle sleeve and steering lever, the axle sleeve is passed to the pivot, and the bottom surface of upper cover plate is passed through to the both ends of pivot, the left and right sides of axle sleeve is connected through the steering lever respectively and is blockked up the valve member.
Furthermore, the blocking valve comprises a valve and a plurality of flow choking blocks, the flow choking blocks are arranged on the valve, and the flow choking blocks are arranged corresponding to the left water outlet or the right water outlet.
Further, the width of the flow blocking block increases from the top surface to the bottom surface.
Further, the steering rod adopts a V-shaped or M-shaped steering rod.
Furthermore, the left water outlet and the right water outlet are respectively arranged in parallel, and the left water outlet and the right water outlet are respectively in a strip shape, a square shape or a trapezoid shape.
Furthermore, the flow resisting structure further comprises a steering adjusting part, the steering adjusting part comprises an adjusting screw and a fastening sleeve, the shaft sleeve penetrates through the fastening sleeve, the fastening sleeve is provided with a lower screw hole, the middle part of the upper cover plate is provided with an upper screw hole, and the adjusting screw penetrates through the upper screw hole, the lower screw hole and abuts against the shaft sleeve.
Furthermore, left side drainage zone and right drainage zone are equipped with the filter screen spare respectively, and the filter screen spare includes metal filter screen and set screw, and the upper cover plate is equipped with the location screw with the set screw adaptation, and the tip of metal filter screen passes through set screw to be connected on the upper cover plate, and the metal filter screen covers left outlet or right drainage mouth.
Further, this sewer apron that can alleviate jam locates road surface department, and left drainage zone sets gradually on road drainage's rivers direction with right drainage zone, and the upper cover plate flushes with road surface.
The invention has the beneficial effects that: this kind can alleviate sewer apron of jam, through setting up wane formula choked flow structure, come to seal left outlet or right outlet, thereby by the difference of left drainage district and the rubbish blocking degree of right drainage district, can form the water current difference, make and block up the valve member and rotate through the steering part, realize the in-process that left drainage district and right drainage district opened and shut, reduce the suction of left outlet or right outlet to rubbish, rubbish is taken away from left drainage district or right drainage district under the rivers effect, form new water current difference, rotate and block up the valve member, make left outlet or right outlet unobstructed, the drainage is smooth, through this kind of structure, can reduce the rubbish that covers and block up the upper cover plate, can reduce the possibility that the outlet became invalid completely by a wide margin, make the sewer apron normally realize the drainage, and need not open the sewer apron and carry out rubbish clearance.
Drawings
FIG. 1 is a schematic view of a structure of a sewer cover plate capable of relieving blockage according to an embodiment of the invention;
FIG. 2 is a schematic structural view of an upper cover plate and a flow blocking structure in accordance with one embodiment;
FIG. 3 is an exploded view of a cover plate of a sewer to relieve blockage according to an embodiment;
fig. 4 is a schematic illustration of the use of a plug-relief sewer cover plate in one-way water flow according to an embodiment, wherein (a) is a schematic illustration in one-way water flow, (b) is a schematic illustration of a plug at a left drain, (c) is a schematic illustration of a plug valve rotating to the left drain under the action of a water flow difference, (d) is a schematic illustration of a plug at a right drain, and (e) is a schematic illustration of a plug leaving the right drain under the action of water flow;
fig. 5 is a schematic illustration of the use of the sewer cover plate for relieving blockage in the opposite water flow according to the embodiment, wherein (a) is a schematic illustration in the opposite water flow, (b) is a schematic illustration of the blockage at the left water outlet, (c) is a schematic illustration of the rotation of the blocking valve member to the left water outlet under the action of the water flow difference, (d) is a schematic illustration of the blockage at the right water outlet, and (e) is a schematic illustration of the movement of the blockage to the left water outlet under the action of the water flow;
FIG. 6 is a schematic structural diagram of a sewer cover plate capable of relieving blockage according to the second embodiment;
FIG. 7 is an exploded view of a sewer cover plate for relieving blockage according to the second embodiment;
wherein: 1-an upper cover plate, 2-a left drainage area, 3-a right drainage area, 4-a left drainage port, 5-a right drainage port, 6-a flow blocking structure and 7-a filter screen element;
61-a blocking valve element, 62-a positioning block, 63-a rotating shaft, 64-a shaft sleeve, 65-a steering rod and 66-a steering adjusting element;
611-valve, 612-choking block;
661-adjusting screw, 662-fastening sleeve, 663-upper screw hole, 664-lower screw hole;
71-metal filter screen, 72-set screw and 73-set screw hole.
Detailed Description
Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
Example one
A sewer cover plate capable of relieving blockage comprises an upper cover plate 1, wherein the upper cover plate 1 is respectively provided with a left drainage area 2 and a right drainage area 3, the left drainage area 2 is provided with a plurality of left drainage openings 4, the right drainage area 3 is provided with a plurality of right drainage openings 5, the upper cover plate 1 is provided with a flow blocking structure 6 for sealing the left drainage openings 4 or the right drainage openings 5, the flow blocking structure 6 adopts a seesaw type flow blocking structure 6, the flow blocking structure 6 comprises a blocking valve 61 and a steering piece for rotating the blocking valve 61, the middle part of the bottom surface of the upper cover plate 1 is provided with the steering piece, and the steering member is arranged between the left drainage area 2 and the right drainage area 3, the steering member comprises a positioning block 62, a rotating shaft 63, a shaft sleeve 64 and a steering rod 65, the rotating shaft 63 passes through the shaft sleeve 64, and both ends of the rotating shaft 63 are connected to the bottom surface of the upper cover plate 1 through the positioning blocks 62, and the left and right sides of the shaft sleeve 64 are respectively connected to the blocking valve members 61 through the steering rods 65.
The sewer cover plate capable of relieving blockage seals the left water outlet 4 or the right water outlet 5 by arranging the seesaw type flow blocking structure 6, so that a water flow difference is formed by the difference of the garbage blocking degree of the left and right drainage areas 2 and 3, so that the blocking valve member 61 is rotated by the turning member to open and close the left and right drainage areas 2 and 3, the suction force of the left water outlet 4 or the right water outlet 5 to the garbage is reduced, the garbage is taken away from the left water discharging area 2 or the right water discharging area 3 under the action of water flow to form a new water flow difference, the blocking valve 61 is rotated to ensure that the left water outlet 4 or the right water outlet 5 is smooth and the water discharging is smooth, through this kind of structure, can reduce to cover the rubbish that blocks up upper cover plate 1, can reduce the possibility that the outlet became invalid completely by a wide margin, make sewer apron normally realize the drainage, and need not open sewer apron and carry out rubbish clearance.
Referring to fig. 2, the blocking valve 61 includes a valve 611 and a plurality of flow blocking blocks 612, the flow blocking blocks 612 are disposed on the valve 611, and the flow blocking blocks 612 are disposed corresponding to the left water outlet 4 or the right water outlet 5. When the blocking valve 61 is rotated to the left drainage area 2 or the right drainage area 3 by the turning member, the flow blocking block 612 is correspondingly embedded into the left drainage port 4 or the right drainage port 5, so that the garbage suction force to the left drainage port 4 or the right drainage port 5 is reduced. The width of the flow blocking block 612 increases from the top surface to the bottom surface, so that the flow blocking block 612 can be conveniently embedded into the left water discharge opening 4 or the right water discharge opening 5.
As shown in fig. 2 and 3, the steering rod 65 is a V-shaped or M-shaped steering rod 65, and the V-shaped or M-shaped steering rod 65 respectively realizes the up-and-down lifting of the blocking valve 61 on the left and right sides, so as to block the left or right side water outlet and reduce the suction force of the water outlet on the garbage above. The left water outlet 4 and the right water outlet 5 are respectively arranged in parallel, and the left water outlet 4 and the right water outlet 5 are both in a strip shape, a square shape or a trapezoid shape.
As shown in fig. 2 and 3, the choke structure 6 further includes a steering adjustment member 66, the steering adjustment member 66 includes an adjustment screw 661 and a fastening sleeve 662, the shaft sleeve 64 passes through the fastening sleeve 662, the fastening sleeve 662 is provided with a lower screw hole 664, the middle portion of the upper cover plate 1 is provided with an upper screw hole 663, and the adjustment screw 661 passes through the upper screw hole 663 and the lower screw hole 664 and abuts against the shaft sleeve 64. The sensitivity of rotation of the blocking valve member 61 is adjusted by adjusting the screw 661 to cause the tightening sleeve 662 to tighten or loosen the sleeve 64. When the sewer cover plate is not in a state of draining a large amount of water, the flow blocking structure 6 is in an arbitrary state, which is not different from the daily-seen sewer cover plate.
As shown in fig. 4 and 5, the sewer cover plate capable of relieving blockage is arranged at the road surface, the left drainage area 2 and the right drainage area 3 are sequentially arranged in the water flow direction of road drainage, and the upper cover plate 1 is flush with the road surface. The water flow difference is formed by the water flow and the garbage at the water discharge port, so as to push the flow blocking structure 6 to rotate up and down.
As shown in fig. 4 and 5, when waterlogging occurs, there are two situations in the flow state of water flow at the drain: the first is unidirectional flow and the other is counter flow. The use of the sewer cover plate capable of relieving blockage is described for the two water flows which appear as follows:
in fig. 4, when the first water flow, i.e., the one-way water flow, occurs, as shown in fig. 4 (a), the flow rate of the water flow itself in the flow direction is larger than the flow rate of the water flow into the drain opening. At this time, if the water flow rate is reduced due to the clogging of the garbage in either of the two discharge ports as shown in FIG. 4 (b), and the difference in the water flow is caused as shown in FIG. 4 (c), this difference in water flow causes the valve 611 of the two blocking valve members 61 near the end of the outlet port with reduced flow to be lifted and eventually block the left outlet port 4 or the right outlet port 5, and the garbage above the outlet port at the blocked end moves toward the end with larger water discharge amount due to the loss of suction and the impact force in the flow direction of the water flow itself, as shown in fig. 4 (d), as the outlet with the originally large flow rate is gradually blocked during the moving process, a new water flow difference is generated, this difference in flow will cause the bottom blocking valve member 61 to again block the outlet port, which is otherwise at a higher flow rate, at which point the plug again loses suction, as shown in fig. 4 (e), and leaves the outlet to continue moving with the water stream under the influence of the impact force of the water stream itself. The whole process of self-cleaning of the sewer cover plate under the condition of the water flow is completed. The sewer cover plate capable of relieving blockage can achieve the purpose of self-cleaning when being used on a one-way water flow passage.
In fig. 5, when the second water flow occurs, i.e., the opposite water flow, as shown in fig. 5 (a), the flow rate of the water flow itself in the flow direction is smaller than the flow rate of the water flow flowing into the drain opening. At this time, as shown in fig. 5 (b), if the water flow rate of any one of the two water outlets is reduced due to the rubbish blockage, as shown in fig. 5 (c), the water flow difference will cause the valve 611 of the two blocked valve members 61 near one end of the water outlet with reduced flow rate to be lifted and finally block the water outlet, at this time, the rubbish above the water outlet with blocked end will move to the end with larger water discharge rate due to the loss of suction force and the impact force in the flow direction of the water flow itself, as shown in fig. 5 (d), as the water outlet with originally large flow rate is gradually blocked during the moving process, a new water flow difference will be generated, and the water flow difference will cause the blocking member 61 at the bottom to block the water outlet with originally large flow rate again, at this time, the blockage will lose suction force again, as shown in fig. 5 (e), and move towards the water outlet with the other end with larger suction force. The above steps are repeated to reduce the probability of the water outlet being completely blocked.
Example two
The second embodiment has substantially the same structure as the first embodiment, and the structure of the second embodiment is different from that of the first embodiment in that: as shown in fig. 6 and 7, the left drainage area 4 and the right drainage area 5 are respectively provided with a filter element 7, the filter element 7 comprises a metal filter screen 71 and a positioning screw 72, the upper cover plate 1 is provided with a positioning screw hole 73 matched with the positioning screw 72, the end of the metal filter screen 71 is connected to the upper cover plate 1 through the positioning screw 72, and the metal filter screen 71 covers the left drainage port 4 or the right drainage port 5. Avoid rubbish, pedestrian's article etc. to pass upper cover plate 1 and fall into the sewer through setting up filter element 7 to need not to open upper cover plate 1 clearance rubbish. The metal filter screen 71 is connected with the upper cover plate 1 through a set screw 72, so that the maintenance or the replacement is convenient. Left drainage zone 4 and right drainage zone 5 set up filter element 7 respectively, can realize changing alone, the maintenance.
The sewer cover plate capable of relieving blockage of the first and second embodiments is characterized in that the left water outlet 4 and the right water outlet 5 are arranged, the rotation of the flow blocking structure 6 is achieved through the water flow difference caused by different blockage degrees of garbage in the water outlets, the left water outlet 4 and the right water outlet 5 are not opened or closed continuously to achieve the purpose that the water outlets work alternately, and the possibility of complete failure of the water outlets can be effectively reduced through the mode.
Although the present invention has been described with reference to the preferred embodiments, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (8)
1. The utility model provides a can alleviate sewer apron of jam, includes the upper cover plate, and the upper cover plate is equipped with left drainage zone and right drainage zone respectively, and left drainage zone is equipped with a plurality of left outlet, and right drainage zone is equipped with a plurality of right outlets, its characterized in that: the upper cover plate is equipped with the choked flow structure that is used for sealing left outlet or right outlet, the choked flow structure adopts wane formula choked flow structure, the choked flow structure is including blockking up the valve member and being used for rotating the steering member that blocks up the valve member, the bottom surface middle part of upper cover plate is equipped with the steering member, and the steering member is located left drainage district and right drainage district within a definite time, the steering member includes the locating piece, the apparatus further comprises a rotating shaft, axle sleeve and steering column, the axle sleeve is passed to the pivot, and the bottom surface of upper cover plate is passed through the locating piece in the both ends of pivot, the left and right sides of axle sleeve is connected through the steering column respectively and is blockked up the valve member.
2. The sewer cover plate capable of alleviating clogging of claim 1, wherein: the blocking valve comprises a valve and a plurality of flow choking blocks, the flow choking blocks are arranged on the valve, and the flow choking blocks are arranged corresponding to the left water outlet or the right water outlet.
3. A sewer cover plate with jam relief as claimed in claim 2, wherein: the width of the flow blocking block increases from the top surface to the bottom surface.
4. The sewer cover plate capable of alleviating clogging of claim 1, wherein: the steering rod adopts a V-shaped or M-shaped steering rod.
5. A sewer cover plate with blockage relief as in any of claims 1 to 4, wherein: the left water outlet and the right water outlet are respectively arranged in parallel, and both the left water outlet and the right water outlet are in a strip shape, a square shape or a trapezoid shape.
6. A sewer cover plate with blockage relief as in any of claims 1 to 4, wherein: the flow resisting structure further comprises a steering adjusting part, the steering adjusting part comprises an adjusting screw and a fastening sleeve, the shaft sleeve penetrates through the fastening sleeve, the fastening sleeve is provided with a lower screw hole, the middle part of the upper cover plate is provided with an upper screw hole, and the adjusting screw penetrates through the upper screw hole, the lower screw hole and abuts against the shaft sleeve.
7. A sewer cover plate with blockage relief as in any of claims 1 to 4, wherein: left side drainage zone and right drainage zone are equipped with the filter screen spare respectively, and the filter screen spare includes metal filter screen and set screw, and the upper cover plate is equipped with the location screw with the set screw adaptation, and the tip of metal filter screen passes through set screw to be connected on the upper cover plate, and the metal filter screen covers left outlet or right drainage mouth.
8. A sewer cover plate with blockage relief as in any of claims 1 to 4, wherein: this can alleviate sewer apron of jam locates road surface, and left drainage district sets gradually on road drainage's rivers direction with right drainage district, and the upper cover plate flushes with road surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210036793.7A CN114351838B (en) | 2022-01-13 | 2022-01-13 | Sewer cover plate capable of relieving blockage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210036793.7A CN114351838B (en) | 2022-01-13 | 2022-01-13 | Sewer cover plate capable of relieving blockage |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114351838A true CN114351838A (en) | 2022-04-15 |
| CN114351838B CN114351838B (en) | 2023-11-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210036793.7A Active CN114351838B (en) | 2022-01-13 | 2022-01-13 | Sewer cover plate capable of relieving blockage |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203701260U (en) * | 2013-12-25 | 2014-07-09 | 茂名职业技术学院 | Rainwater well cover capable of automatically controlling displacement |
| CN206706971U (en) * | 2017-05-18 | 2017-12-05 | 姜天佑 | The in line odour-proof floor drain of pipeline external turnover panel big flow |
| CN108867704A (en) * | 2018-08-23 | 2018-11-23 | 夏柱飞 | It is a kind of pressure balanced from dredging inspection well cover |
| CN109440907A (en) * | 2018-11-02 | 2019-03-08 | 郎子乂 | A kind of anti-clogging sewer cover plate |
| KR102057994B1 (en) * | 2019-05-07 | 2019-12-20 | 주식회사 송원하이텍 | Trap for road drain hole |
| CN112962758A (en) * | 2021-02-06 | 2021-06-15 | 广东建安市政工程有限公司 | Drainage pipeline system for municipal road engineering |
| CN213805760U (en) * | 2020-11-17 | 2021-07-27 | 鸡泽县欧迪铸造有限公司 | Sewer well lid with dredging function |
| CN214738624U (en) * | 2021-03-23 | 2021-11-16 | 昆明冶金高等专科学校 | Novel road rainwater flow guiding device |
-
2022
- 2022-01-13 CN CN202210036793.7A patent/CN114351838B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203701260U (en) * | 2013-12-25 | 2014-07-09 | 茂名职业技术学院 | Rainwater well cover capable of automatically controlling displacement |
| CN206706971U (en) * | 2017-05-18 | 2017-12-05 | 姜天佑 | The in line odour-proof floor drain of pipeline external turnover panel big flow |
| CN108867704A (en) * | 2018-08-23 | 2018-11-23 | 夏柱飞 | It is a kind of pressure balanced from dredging inspection well cover |
| CN109440907A (en) * | 2018-11-02 | 2019-03-08 | 郎子乂 | A kind of anti-clogging sewer cover plate |
| KR102057994B1 (en) * | 2019-05-07 | 2019-12-20 | 주식회사 송원하이텍 | Trap for road drain hole |
| CN213805760U (en) * | 2020-11-17 | 2021-07-27 | 鸡泽县欧迪铸造有限公司 | Sewer well lid with dredging function |
| CN112962758A (en) * | 2021-02-06 | 2021-06-15 | 广东建安市政工程有限公司 | Drainage pipeline system for municipal road engineering |
| CN214738624U (en) * | 2021-03-23 | 2021-11-16 | 昆明冶金高等专科学校 | Novel road rainwater flow guiding device |
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| Publication number | Publication date |
|---|---|
| CN114351838B (en) | 2023-11-17 |
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