CN214423515U - Rain-proof structure of landfill area of rigidity landfill - Google Patents
Rain-proof structure of landfill area of rigidity landfill Download PDFInfo
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- CN214423515U CN214423515U CN202120030032.1U CN202120030032U CN214423515U CN 214423515 U CN214423515 U CN 214423515U CN 202120030032 U CN202120030032 U CN 202120030032U CN 214423515 U CN214423515 U CN 214423515U
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- 230000008595 infiltration Effects 0.000 claims abstract description 11
- 238000001764 infiltration Methods 0.000 claims abstract description 11
- 238000007789 sealing Methods 0.000 claims description 26
- 239000002351 wastewater Substances 0.000 claims description 10
- 238000002386 leaching Methods 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims 1
- 239000010813 municipal solid waste Substances 0.000 abstract description 15
- 239000002689 soil Substances 0.000 abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 10
- 230000000694 effects Effects 0.000 abstract description 7
- 101150054854 POU1F1 gene Proteins 0.000 description 8
- 238000000034 method Methods 0.000 description 3
- 230000007774 longterm Effects 0.000 description 2
- 239000012466 permeate Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 241000826860 Trapezium Species 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009264 composting Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
The utility model provides a rain-proof structure of landfill area of rigidity landfill, including the landfill hole, the position that the annular internal surface of landfill hole is close to the upper end is fixed installs first sealed lid, the position that the inside of first sealed lid is close to the center has seted up the through-hole, the position that the lower extreme surface of first sealed lid is close to the center has fixedly connected with the rain collecting pipe, the position that the annular surface of rain collecting pipe is close to the lower extreme has fixedly connected with the peak shape board, the annular surface of rain collecting pipe and the junction of peak shape board have seted up multiunit semicircle orifice, and the device can in time discharge the rainwater that the earth surface is piled up in rainwater weather, avoids rainwater infiltration to lead to landfill hole inner wall damage to the rubbish inflation in the landfill hole in making the landfill hole, and then makes harmful rubbish infiltration soil pollute soil and water, filters the debris in the rainwater through setting up the filter screen, avoid the drain pipe to block up and influence drainage effect.
Description
Technical Field
The utility model belongs to the technical field of the landfill technique and specifically relates to a rain-proof structure of landfill area of rigidity landfill is related to.
Background
The garbage disposal method can be generally divided into a plurality of modes of sanitary landfill, incineration, composting and the like, the garbage landfill is a garbage centralized stacking site adopting the sanitary landfill mode, the garbage sanitary landfill is widely applied in China due to low cost and good sanitation degree, and with the current environment protection situation becoming more and more severe, the industrial solid wastes are subjected to reduction, recycling and harmless treatment, but each treatment mode can generate a large amount of ash, the ash contains a large amount of unprocessed heavy metal substances and part of toxic and harmful substances, so the ash still belongs to dangerous wastes, and finally enters the landfill after being stabilized.
In the implementation of the utility model discloses the in-process, it does not solve to have following problem among the prior art at least to discover: 1. at present, most of landfill sites are simply sealed at the sealing positions of the landfill sites after the landfill sites are filled with garbage, and as the landfill sites are generally arranged outdoors, long-time rainwater accumulation of the landfill sites cannot be conducted in rainy areas, rainwater easily permeates into the landfill sites, the garbage in the landfill sites can expand when encountering water, the inner walls of the landfill sites can be easily damaged, and further harmful garbage permeates into the land to pollute soil and water;
2. although some landfill sites are provided with rain drainage systems, the earth surface of the landfill sites has a lot of sundries which easily enter rain drainage pipelines along with rainwater, and then the rain drainage pipelines are blocked, so that the rain drainage effect is influenced.
Therefore, a rain-proof structure for the landfill area of the rigid landfill site is provided.
SUMMERY OF THE UTILITY MODEL
A first object of the utility model is to provide a rain-proof structure of landfill region of rigidity landfill, the device can in time discharge the accumulational rainwater in earth's surface at rainwater weather, thereby avoid the rainwater infiltration to make the rubbish inflation in the landfill hole lead to the landfill hole inner wall damaged in the landfill hole, and then make harmful rubbish infiltration soil pollute soil to soil and water, filter the debris of rainwater through setting up the filter screen, avoid drain pipe jam to influence drainage effect, with the problem of proposing in solving above-mentioned background art.
The utility model provides a landfill regional rain-proof structure of rigidity landfill, including the landfill hole, the position fixed mounting that the annular internal surface of landfill hole is close to the upper end has first sealed lid, the through-hole has been seted up to the position that the inside of first sealed lid is close to the center, the lower extreme surface of first sealed lid is close to the position fixedly connected with rain collecting pipe at center, the position fixedly connected with peak plate of lower extreme is close to the annular surface of rain collecting pipe, the multiunit semicircle orifice has been seted up with peak plate junction to the annular surface of rain collecting pipe, the multiunit basin has been seted up to the upper end surface of peak plate, the basin is identical with the semicircle orifice, the annular surface of peak plate is provided with the filter screen.
Through adopting above-mentioned technical scheme, the device can in time discharge the accumulational rainwater in earth's surface at rainwater weather, thereby avoid the rainwater infiltration to make the rubbish inflation in the landfill hole lead to the landfill hole inner wall damaged in the landfill hole, and then make harmful rubbish infiltration soil pollute soil and water, filter the debris of rainwater through setting up the filter screen, avoid drain pipe jam influence drainage effect.
Preferably, a connecting rod is fixedly arranged at a position, close to the center, of the outer surface of the lower end of the peak plate, a second sealing cover is fixedly arranged at a position, close to the lower side of the peak plate, of the annular inner surface of the landfill pit, a receiving pipe is fixedly connected to the outer surface of the upper end of the second sealing cover, a groove is formed in a position, close to the center, of the inner portion of the receiving pipe, the groove is matched with the connecting rod, an arc-shaped clamping groove is formed in the annular outer surface of the peak plate, an arc-shaped plate is arranged in the arc-shaped clamping groove, the arc-shaped clamping groove and the arc-shaped plate are mutually matched in a T-shaped structure, an annular plate is in threaded connection with the outer surface of the front end of the arc-shaped plate, a filter screen is fixedly arranged on the annular inner surface of the annular plate, a plurality of groups of first rain dredging channels are formed above the annular inner surface of the landfill pit, close to the second sealing cover, and a rain drainage branch pipe is fixedly connected to one end of the first rain dredging channels, one end of the rain drainage branch pipe is fixedly connected with a weeping pipe.
Through adopting above-mentioned technical scheme, install the sealed lid of second earlier, insert the connecting rod in the recess and then the fixed peak board again, the filter screen is identical with first rain shedding channel this moment, take out the arc and make the filter screen enter into the inside of first rain shedding channel, during the rainy day, the rainwater can enter into the basin through-hole and semicircle orifice, rethread basin enters into first rain shedding channel, finally get into the leachate pipe through the branch pipe that drains and discharges, owing to set up the filter screen between basin and first rain shedding channel, can avoid debris to enter into first rain shedding channel and then arouse first rain shedding channel to block up, owing to pass through threaded connection between annular plate and the arc, when needs clear up the filter screen, only need open first sealed lid, it can to unscrew the annular plate again.
Preferably, a plurality of groups of second rain dredging channels are formed in the outer surface of the upper end of the second sealing cover, which is close to the edge, and one ends of the second rain dredging channels are connected with the rain draining branch pipes.
Through adopting above-mentioned technical scheme, the rainwater accessible second of by the infiltration of peak shape board dredges the rain passageway and enters into row rain branch pipe, and rethread row rain branch pipe enters into and discharges in the leachate pipe, prevents that the rainwater from the sealed lid of second from permeating to the landfill in the hole.
Preferably, one end of the seepage and leaching pipe is connected with the bottom end of the inner surface of the landfill pit, and the other end of the seepage and leaching pipe is fixedly connected with a wastewater pond.
Through adopting above-mentioned technical scheme, the rainwater can finally be discharged into the wastewater disposal basin by infiltration waterlogging caused by excessive rainfall pipe.
Preferably, the outer surface of the upper end of the peak plate is of a trapezoidal structure, and a plurality of groups of supporting frames are fixedly mounted on the outer surface of the lower end of the peak plate.
Through adopting above-mentioned technical scheme, trapezoidal structure helps the rainwater to enter into first rain channel by the basin fast in, has improved row's rain speed, and the support frame can prevent that the peak plate from producing deformation in the long-term use, and then influences row's rain effect.
Preferably, the peak plate has the same diameter as the diameter of the landfill pit.
By adopting the technical scheme, the annular outer surface of the peak-shaped plate is seamlessly attached to the annular inner surface of the landfill pit, so that rainwater is prevented from permeating into the landfill pit through gaps.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the device is characterized in that a series of structural components such as a first sealing cover, a second sealing cover, a peak plate and the like are added, the second sealing cover is installed firstly, a connecting rod is inserted into a groove to fix the peak plate, at the moment, a filter screen is matched with a first rain dredging channel, an arc plate is drawn out to enable the filter screen to enter the first rain dredging channel, rainwater enters a water tank through a through hole and a semicircular hole and then enters the first rain dredging channel, finally enters a seepage pipe through a rain drainage branch pipe to be discharged into a wastewater pool, rainwater infiltrated by the peak plate can enter the rain drainage branch pipe through the second rain dredging channel and then enters the seepage pipe through the rain drainage branch pipe to be discharged into the wastewater pool, and rainwater is prevented from infiltrating into a landfill pit from the second sealing cover;
2. through adding the arc in the device, a series of structural component such as annular plate and filter screen, the connecting rod inserts the recess and fixes the peak plate, the filter screen is identical with first rain shedding channel this moment, take out the arc and make the filter screen enter into the inside of first rain shedding channel, owing to set up the filter screen between basin and first rain shedding channel, can avoid debris to enter into in the first rain shedding channel and then arouse first rain shedding channel to block up, because pass through threaded connection between annular plate and the arc, when needs clear up the filter screen, only need open first sealed lid, it can to back out the annular plate again.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a sectional view of the structure of the present invention;
fig. 2 is a combination view of the first sealing cover, the second sealing cover and the peak plate of the present invention;
FIG. 3 is a combination view of the peak plate and the rain collecting pipe of the present invention;
FIG. 4 is a combined cross-sectional view of the arc-shaped slot and the arc-shaped plate of the present invention;
fig. 5 is a combined view of the second sealing cover and the landfill pit according to the present invention.
Description of reference numerals:
1. filling the pit; 2. a first sealing cover; 3. a through hole; 4. a rain collecting pipe; 5. a peak plate; 6. a semicircular hole; 7. a water tank; 8. an arc-shaped clamping groove; 9. an arc-shaped plate; 10. an annular plate; 11. filtering with a screen; 12. a connecting rod; 13. a second sealing cover; 14. a bearing pipe; 15. a groove; 16. a first rain shedding channel; 17. a second rain shedding channel; 18. a support frame; 19. a rain drainage branch pipe; 20. a leachate pipe; 21. a wastewater tank.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise. Furthermore, the terms "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1 to 5, the present invention provides a technical solution:
the utility model provides a rain-proof structure of landfill region of rigidity landfill, as shown in fig. 1 to 3, including the landfill hole 1, the position fixed mounting that the annular internal surface of landfill hole 1 is close to the upper end has first sealed lid 2, the inside of first sealed lid 2 is close to the position at center and has seted up through-hole 3, the position fixedly connected with rain collecting pipe 4 that the lower extreme surface of first sealed lid 2 is close to the center, the position fixedly connected with peak plate 5 that the annular surface of rain collecting pipe 4 is close to the lower extreme, multiunit semicircle orifice 6 has been seted up with peak plate 5 junction to the annular surface of rain collecting pipe 4, multiunit basin 7 has been seted up to the upper end surface of peak plate 5, basin 7 is identical with semicircle orifice 6, the annular surface of peak plate 5 is provided with filter screen 11.
Through adopting above-mentioned technical scheme, the device can in time discharge the accumulational rainwater in earth's surface in rainwater weather, thereby avoid the rainwater infiltration to make the rubbish inflation in the landfill hole 1 lead to the 1 inner wall damage in landfill hole 1 in the landfill hole 1, and then make harmful rubbish infiltration soil pollute soil and water, filter the debris of rainwater through setting up filter screen 11, avoid the drain pipe to block up the influence drainage effect.
Specifically, as shown in fig. 1 to 5, a connecting rod 12 is fixedly installed at a position, close to the center, of the outer surface of the lower end of the peak plate 5, a second sealing cover 13 is fixedly installed at a position, close to the lower side of the peak plate 5, of the inner surface of the ring of the landfill pit 1, a receiving pipe 14 is fixedly connected to the outer surface of the upper end of the second sealing cover 13, a groove 15 is formed in the position, close to the center, of the receiving pipe 14, the groove 15 is matched with the connecting rod 12, an arc-shaped clamping groove 8 is formed in the outer surface of the ring of the peak plate 5, an arc-shaped plate 9 is arranged in the arc-shaped clamping groove 8, the arc-shaped clamping groove 8 and the arc-shaped plate 9 are matched with each other in a T-shaped structure, the outer surface of the front end of the arc-shaped plate 9 is in threaded connection with the ring-shaped plate 10, a filter screen 11 is fixedly installed on the inner surface of the ring of the landfill pit 1, a plurality of sets of first rain dredging channels 16 are formed above the inner surface, close to the second sealing cover 13, one end of the first rain dredging channel 16 is fixedly connected with a rain draining branch pipe 19, and one end of the rain draining branch pipe 19 is fixedly connected with a leachate pipe 20.
Through adopting above-mentioned technical scheme, install the sealed 13 of second earlier, insert connecting rod 12 in recess 15 and then fixed peak board 5 again, filter screen 11 is identical with first rain shedding passage 16 this moment, take out arc 9 and make filter screen 11 enter into the inside of first rain shedding passage 16, during rainy, the rainwater can enter into basin 7 through-hole 3 and semicircle orifice 6, rethread basin 7 enters into first rain shedding passage 16, finally, it discharges to get into leachate pipe 20 through rain-discharging branch pipe 19, owing to set up filter screen 11 between basin 7 and first rain shedding passage 16, can avoid debris to enter into first rain shedding passage 16 and then arouse first rain shedding passage 16 to block up, owing to pass through threaded connection between annular plate 10 and the arc 9, when needs clear up filter screen 11, only need open first sealed lid 2, it can to unscrew board annular plate 10 again.
Specifically, as shown in fig. 1, a plurality of sets of second rain shedding passages 17 are formed in the outer surface of the upper end of the second sealing cover 13 near the edge, and one end of each second rain shedding passage 17 is connected to a rain drainage branch pipe 19.
By adopting the above technical scheme, rainwater infiltrated by the peak-shaped plate 5 can enter the rainwater drainage branch pipe 19 through the second rainwater drainage channel 17, and then enter the leachate draining pipe 20 through the rainwater drainage branch pipe 19 to be drained, so that the rainwater is prevented from infiltrating into the landfill pit 1 from the second sealing cover 13.
Specifically, as shown in fig. 1, one end of the leachate pipe 20 is connected to the bottom end of the inner surface of the landfill pit 1, and the other end of the leachate pipe 20 is fixedly connected to a wastewater tank 21.
By adopting the technical scheme, the rainwater can be finally discharged into the wastewater tank 21 through the leachate pipe 20.
Specifically, as shown in fig. 2, the outer surface of the upper end of the peak plate 5 is in a trapezoidal structure, and a plurality of groups of support frames 18 are fixedly mounted on the outer surface of the lower end of the peak plate 5.
Through adopting above-mentioned technical scheme, the trapezium structure helps the rainwater to enter into first dredged rain passageway 16 by basin 7 fast in, has improved row rain speed, and support frame 18 can prevent that peak plate 5 from producing deformation in the long-term use, and then influences row rain effect.
Specifically, as shown in fig. 1, the diameter of the peak plate 5 is the same as that of the landfill pit 1.
By adopting the technical scheme, the annular outer surface of the peak-shaped plate 5 is seamlessly attached to the annular inner surface of the landfill pit 1, so that rainwater is prevented from permeating into the landfill pit 1 through gaps.
The working principle is as follows: a series of structural components such as a first sealing cover 2, a second sealing cover 13, a peak plate 5 and the like are added into the device, the second sealing cover 13 is installed firstly, then a connecting rod 12 is inserted into a groove 15 to fix the peak plate 5, at the moment, a filter screen 11 is matched with a first rain dredging channel 16, an arc-shaped plate 9 is drawn out to enable the filter screen 11 to enter the first rain dredging channel 16, rainwater enters a water tank 7 through a through hole 3 and a semicircular hole 6 and then enters the first rain dredging channel 16 through the water tank 7 during raining, finally enters a seepage and drainage pipe 20 through a rain drainage branch pipe 19 to be drained into a waste water tank 21, rainwater infiltrated by the peak plate 5 can enter the rain drainage branch pipe 19 through the second rain dredging channel 17 and then enters the seepage and drainage pipe 20 through the rain drainage branch pipe 19 to be drained into the waste water tank 21, rainwater is prevented from infiltrating into a buried pit 1 from the second sealing cover 13, the arc-shaped plate 9, the peak plate 12 and the peak plate 5 are added into the device, A series of structural components such as annular plate 10 and filter screen 11, connecting rod 12 inserts recess 15 and fixes peak plate 5, filter screen 11 is identical with first dredging rain passageway 16 this moment, take out arc 9 and make filter screen 11 enter into the inside of first dredging rain passageway 16, owing to set up filter screen 11 between basin 7 and first dredging rain passageway 16, can avoid debris to enter into first dredging rain passageway 16 in and then arouse that first dredging rain passageway 16 blocks up, because pass through threaded connection between annular plate 10 and the arc 9, when needs clear up filter screen 11, only need open first sealed lid 2, it can to back out annular plate 10 again.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (6)
1. The utility model provides a rain-proof structure of landfill region of rigidity landfill which characterized in that: including landfill hole (1), the position fixed mounting that the annular internal surface of landfill hole (1) is close to the upper end has first sealed lid (2), through-hole (3) have been seted up to the inside of first sealed lid (2) near the position at center, the lower extreme surface of first sealed lid (2) is close to the position fixedly connected with rain collection pipe (4) at center, the annular surface of rain collection pipe (4) is close to the position fixedly connected with peak plate (5) of lower extreme, multiunit semicircle orifice (6) have been seted up with peak plate (5) junction to the annular surface of rain collection pipe (4), multiunit basin (7) have been seted up to the upper end surface of peak plate (5), basin (7) are identical with semicircle orifice (6), the annular surface of peak plate (5) is provided with filter screen (11).
2. A landfill site flashing structure for a rigid landfill site as claimed in claim 1, wherein: the device is characterized in that a connecting rod (12) is fixedly mounted at a position, close to the center, of the outer surface of the lower end of the peak plate (5), a second sealing cover (13) is fixedly mounted at a position, close to the lower side of the peak plate (5), of the inner annular surface of the landfill pit (1), a receiving pipe (14) is fixedly connected to the outer surface of the upper end of the second sealing cover (13), a groove (15) is formed in a position, close to the center, of the inner portion of the receiving pipe (14), the groove (15) is matched with the connecting rod (12), an arc clamping groove (8) is formed in the outer annular surface of the peak plate (5), an arc plate (9) is arranged in the arc clamping groove (8), the arc clamping groove (8) and the arc plate (9) are in a T-shaped structure and matched with each other, a ring plate (10) is in threaded connection with the outer surface of the front end of the arc plate (9), and a filter screen (11) is fixedly mounted in the inner annular surface of the ring plate (10), the annular inner surface of landfill hole (1) is close to the top of second sealed lid (13) and has been seted up the first channel of dredging rain of multiunit (16), the one end fixedly connected with branch pipe of draining rain (19) of the first channel of dredging rain (16), the one end fixedly connected with infiltration liquid pipe (20) of branch pipe of draining rain (19).
3. A landfill site flashing structure for a rigid landfill site as claimed in claim 2, wherein: and a plurality of groups of second rain dredging channels (17) are formed in the outer surface of the upper end of the second sealing cover (13) close to the edge, and one end of each second rain dredging channel (17) is connected with a rain drainage branch pipe (19).
4. A landfill site flashing structure for a rigid landfill site as claimed in claim 2, wherein: one end of the seepage and leaching pipe (20) is connected with the bottom end of the inner surface of the landfill pit (1), and the other end of the seepage and leaching pipe (20) is fixedly connected with a wastewater pool (21).
5. A landfill site flashing structure for a rigid landfill site as claimed in claim 1, wherein: the outer surface of the upper end of the peak plate (5) is of a trapezoidal structure, and a plurality of groups of supporting frames (18) are fixedly mounted on the outer surface of the lower end of the peak plate (5).
6. A landfill site flashing structure for a rigid landfill site as claimed in claim 1, wherein: the diameter of the peak plate (5) is the same as that of the landfill pit (1).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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CN202120030032.1U CN214423515U (en) | 2021-01-07 | 2021-01-07 | Rain-proof structure of landfill area of rigidity landfill |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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CN202120030032.1U CN214423515U (en) | 2021-01-07 | 2021-01-07 | Rain-proof structure of landfill area of rigidity landfill |
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Publication Number | Publication Date |
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CN214423515U true CN214423515U (en) | 2021-10-19 |
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ID=78054966
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CN202120030032.1U Expired - Fee Related CN214423515U (en) | 2021-01-07 | 2021-01-07 | Rain-proof structure of landfill area of rigidity landfill |
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CN (1) | CN214423515U (en) |
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2021
- 2021-01-07 CN CN202120030032.1U patent/CN214423515U/en not_active Expired - Fee Related
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