CN107268765A - The method and device of pernicious gas in a kind of draining-off sewage pipe network - Google Patents
The method and device of pernicious gas in a kind of draining-off sewage pipe network Download PDFInfo
- Publication number
- CN107268765A CN107268765A CN201710522688.3A CN201710522688A CN107268765A CN 107268765 A CN107268765 A CN 107268765A CN 201710522688 A CN201710522688 A CN 201710522688A CN 107268765 A CN107268765 A CN 107268765A
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- Prior art keywords
- pipe
- gas
- inspection shaft
- sewage
- draining
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/08—Ventilation of sewers
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)
- Sink And Installation For Waste Water (AREA)
- Sewage (AREA)
Abstract
The invention discloses a kind of apparatus and method of pernicious gas in draining-off sewage pipe network, the soil stack on building is connected on inspection shaft by going out family pipe；The bottom connection gas skirt of breather pipe on sewage main pipe downstream building, in the other end of breather pipe, rotation blast cap is set, the well lid of inspection shaft is sealed, so that pernicious gas is converged in sewage main pipe, soil stack is brought ambient atmos into inspection shaft in drainage procedure and constantly accumulated, and air pressure is raised in well, drives sewage main pipe internal gas flow, gas in sewage main pipe is collected by gas skirt, discharged finally by breather pipe.Apparatus of the present invention are simple, and floor space is small, low to highway communication influence degree；Cost is low, without extra addition power set, and the rotation blast cap for pipe end of ventilating can just realize exhaust under faint wind-force effect.
Description
Technical field
The present invention relates to construction drainage and municipal works field, and in particular to pernicious gas in a kind of draining-off sewage pipe network
Apparatus and method.
Background technology
When the pernicious gas such as cumulative methane in municipal sewage pipe network and hydrogen sulfide, the normal blowdown work(of pipe network can be influenceed
Energy.Methane occurs easily to be lighted or even exploded by naked light in the case that low concentration mixes (5%) with air, and high concentration
Hydrogen sulfide gas can not only poison health, can also corrosion pipeline and trigger sewage to leak.Environmental Protection Agency is to underground sewage
The investigation of pipe network finds that the corrosion basic reason that sewage conduct is subject to is the generation and aggregation of hydrogen sulfide, dense when sulfide
When degree reaches 2mg/L, serious corrosion can occur for tube wall, and annual corrosion rate can be between 2.5mm and 10mm.Anaerobism
The amount reproduction of microorganism is the immediate cause for causing methane and hydrogen sulfide to produce and accumulate under environment.As sewage is in pipe network
Flowing, oxygen is gradually consumed by microorganism and bacterium, but is difficult to be supplemented, in such a case, some anaerobic bacteria (sulphur
Hydrochlorate reducing bacteria and methane backeria) start amount reproduction, and the larger molecular organicses in sewage are anti-by a series of biochemistries
Should, produce hydrogen sulfide and spill among air.If hydrogen sulfide can not come out from pipe network internal discharge in time, will constantly it tire out
In product, the side wall for being attached to internal humidity, finally corrode sewage conduct.
Accordingly, it is capable to anaerobic environment in no improvement pipe network, suppresses the breeding of anaerobic bacteria, it is to reduce reduction pernicious gas accumulation
Measure and avoid the key point of personnel casualty accidentses.To reach this purpose, the measure taken at present mainly has two kinds：(1) drum
Wind method：By inspection shaft or the air blower of pipeline opening, anaerobic environment can be changed by inside fresh air conveying to pipeline
For aerobic environment, so as to inhibit the generation of methane and hydrogen sulfide.(2) method is added：The action principle for adding method is different.If
In order to suppress the activity about microorganism, alkaline environment is created, quick lime etc. can be added；If in order to influence methane and H2S's
Produce, the oxidation-reduction potential of water body can be improved, the materials such as nitrate are added；If in order to control the loss process of sulfide,
Metal ion can be added, promotes sulfide to change to form metal sulfide and deposited.Existing two methods can drop
Harmful gas concentration in low underground sewer, improves the anaerobic environment inside pipe network, but also have certain limitation simultaneously.Drum
Anaerobic environment is changed into aerobic environment by wind method although improving the oxygen concentration in pipeline rapidly, but action time can not
Muchly maintain down；Also, acted on and being limited by oxygen mass transfer, alternated blasting is difficult to produce the microorganism for being deposited on pipeline bed mud
Raw influence.The method of adding needs to add a large amount of medicines, therefore not economical enough, and drug variety can produce influence to treatment effect,
The medicine newly added also influences whether the final treatment effect of sewage.
The content of the invention
For the defect and deficiency of existing technology of preparing, it is an object of the invention to provide be harmful in a kind of draining-off sewage pipe network
The apparatus and method of gas, solve the limitation of existing sewer gas elimination technique presence and cause pipeline easily to explode
And the problem of release of toxic gas.
To achieve these goals, the present invention, which is adopted the following technical scheme that, is achieved：
A kind of pernicious gas method in draining-off sewage pipe network, this method is to the row on sewage main pipe, inspection shaft, building
Water standpipe and breather pipe are handled, and are comprised the following steps：
Soil stack on building is connected on inspection shaft, the breather pipe of sewage main pipe downstream building is connected
On sewage main pipe, inspection shaft is sealed so that gas is converged in sewage main pipe；Soil stack will in drainage procedure
Ambient atmos bring inspection shaft into so that air pressure is constantly raised in inspection shaft, so as to promote sewage main pipe internal gas flow, most
Discharged eventually by breather pipe.
Further, the architectural soil stack in the preferred sewage main pipe upstream of soil stack that is connected on inspection shaft.
Further, gas skirt (6) is provided with ventilation pipe end, the position of described gas skirt is higher than in inspection shaft most
High water level, breather pipe top flows to sewage trunk provided with the gas rotated inside blast cap (7), sewage main pipe along water (flow) direction
At the breather pipe in pipe downstream, in the presence of gas skirt and rotation blast cap gas is discharged by breather pipe.
The present invention gives a kind of device of pernicious gas in draining-off sewage pipe network, and the device is respectively arranged on inspection shaft, built
Build on the breather pipe and soil stack of thing, described inspection shaft is on sewage main pipe, and the device includes gas skirt, rotary wind
Cap and closing cover；
Described gas skirt is located in inspection shaft, and described gas skirt is connected to logical on sewage main pipe downstream building
Tracheae one end, described rotation blast cap is located at the other end of breather pipe；
Described soil stack is turned on inspection shaft；
Described inspection shaft is sealed by closing cover.
Further, the soil stack on described sewage main pipe upstream building goes out family pipe by one and is connected to inspection
On well.
Further, the open hole on described inspection shaft well lid is sealed by closing cover；Described closing cover includes cap
Lid, cap handle and lancet, described cap handle are connected to cap one end, and described lancet is located at the cap other end.
Further, described cap is in umbrella, and described cap, which is provided with groove, described groove, is provided with rotating shaft,
Described lancet is connected in rotating shaft.
Further, the position of described gas skirt is higher than the peak level in inspection shaft.
Further, described rotation blast cap is provided with an auxiliary tube, and one end of described auxiliary tube is placed in breather pipe,
The other end of auxiliary tube passes through rotation blast cap.
Compared with prior art, the beneficial effects of the invention are as follows：
(1) present invention utilizes current free-falling in soil stack by the way that sewage pipe and building soil stack are connected
When the gas that carries constantly accumulated in inspection shaft, the accumulation of air pressure causes sewage conduct two ends to there is draught head in sewage pipe,
And then promote the gas inside pipeline to be moved along the direction of current, breather pipe discharge is eventually passed, is realized in sewage conduct
The air exchange in portion, improves anaerobic environment.
(2) apparatus of the present invention are simple, and floor space is small, low to highway communication influence degree.
(3) cost of the present invention is low, and without extra addition power set, the rotation blast cap of ventilation pipe end can be faint
Exhaust can be just realized under wind-force effect.
Brief description of the drawings
Fig. 1 is the connection diagram of breather pipe of the present invention and leakage check well.
Fig. 2 is the connection diagram of rotation blast cap and breather pipe.
Fig. 3 is inspection shaft schematic diagram.
Fig. 4 is inspection shaft closing cover connection diagram.
Fig. 5 is that sewage main pipe is connected schematic diagram with building drainpipe.
The implication of each label in accompanying drawing：1- sewage main pipes, 2- trunk sewers, 3- inspection shafts, 4- soil stacks, 5- ventilations
Pipe, 6- gas skirts, 7- rotation blast caps, 8- goes out family pipe, 9- connecting tubes；
(3-1)-well lid, (3-2)-open hole, (3-3)-closing cover, (3-3-1)-cap, (3-3-2)-cap handle, (3-3-
3)-lancet, (3-3-4)-groove, (3-3-5)-rotating shaft；(7-1)-auxiliary tube.
Explanation is further explained in detail to the particular content of the present invention with reference to embodiments.
Embodiment
Breather pipe bottom on existing building is connected with soil stack, and the other end is located at top of building, and draining is stood
Pipe is connected to the going out on the pipe of family of below ground, goes out family pipe and is connected with trunk sewer, trunk sewer is switched in inspection shaft, building
Draining is converged in sewage main pipe by trunk sewer.The present invention is realized by causing draught head at sewage main pipe two ends
Internal gas exchanges in pipe, improve anaerobic environment.For one section is likely to occur the sewage conduct of pernicious gas accumulation,
In normal conditions, inside sewage pipeline air pressure is held essentially constant with the air pressure in the inspection shaft of two ends, thus having in pipeline
Evil gas is accumulated；If now the inspection shaft of its upstream can be connected with the soil stack of building, the inspection in downstream
Well is connected with the breather pipe of another building, just can utilize the gas carried in soil stack during current free-falling
Come, then by means of some existing facilities, realize the gas exchanges of inside sewage pipeline, suppress the breeding of anaerobe.When
When soil stack 4 is joined directly together with the inspection shaft on sewage main pipe 1, then a part of gas in soil stack also will
As current enter inspection shaft, further, if inspection shaft is closed, the continuous accumulation of gas can just be formed in inspection shaft
Local positive pressure environment so that pressure differential is formed between upstream inspection shaft and downstream inspection shaft, promotes pernicious gas in sewage
It is mobile；On the other hand, if it is possible to which the individual inspection shaft 3 in the downstream of sewage main pipe 1 is connected with the road of breather pipe 5 of skyscraper,
When blast cap 7 is rotated under wind-force effect, the gas in breather pipe can be pumped out.So, skyscraper is logical
Tracheae and the inspection shaft being attached thereto can form local subnormal ambient.The draught head at the two ends of sewage main pipe 1 just can be pushed away
Gas inside dynamic pipeline is moved along the direction of current, is eventually passed breather pipe 5 and is discharged, realizes inside sewage pipeline
Air exchange, improves anaerobic environment, so as to solve the pipe explosion and toxic gas leakage problem frequently occurred.
Current inspection shaft typically offers open hole 3-2 in order to easy to installation and maintenance on well lid, in order to prevent
Evil gas is come out by the hole loss on well lid, it is necessary to carry out encapsulation process to inspection shaft.The present invention will be opened using closing cover
Open hole to block, cause on the basis of effect pernicious gas in inspection shaft not not influenceing traffic above-ground and inspection shaft to bring into normal play
Disconnected accumulation.Specifically, closing cover includes cap 3-3-1, cap handle 3-3-2 and lancet 3-3-3, cap handle is connected to cap one end, carried
Hook 3-3-3 is located at the cap other end, and cap 3-3-2 is in umbrella, and cap, which is provided with to be provided with groove 3-3-4, groove 3-3-4, to be turned
Axle 3-3-5, lancet 3-3-3 is connected on rotating shaft 3-3-5.When needing to open open hole, closing cover is lifted just using hook
Can be with.
The present invention is provided with gas skirt 6 in the end of breather pipe 5 in inspection shaft.Especially, the arrangement of gas skirt will
Higher than the peak level being likely to occur in inspection shaft, to ensure that gas is all discharged from breather pipe as far as possible.
The present invention be provided with the top of the breather pipe above building rotation blast cap 7, blast cap be higher by building roof away from
From more than 2 meters, when wind direction is level, blast cap can rotate, and the negative pressure at the blast cap back side can provide the suction of vertical direction
Power so that the gas inside breather pipe is emitted.Further, auxiliary tube 7-1 is set on blast cap, suction effect can be strengthened
Really, the gas migration speed inside breather pipe is accelerated.
Specific embodiment of the invention given below is, it is necessary to which explanation is that the invention is not limited in implement in detail below
Example, all equivalents done on the basis of technical scheme each fall within protection scope of the present invention.
Embodiment 1
The present embodiment provides a kind of pernicious gas method in draining-off sewage pipe network, and this method is to the soil stack on building
Handled with breather pipe, including：Soil stack on building is connected on inspection shaft, sewage main pipe downstream is built
The breather pipe of thing is connected on sewage main pipe, and inspection shaft is sealed so that gas is converged in sewage main pipe；Soil stack
Ambient atmos are brought into inspection shaft in drainage procedure so that air pressure is constantly raised in inspection shaft, so as to drive sewage main pipe
Internal gas flow, is discharged eventually through breather pipe.
Embodiment 2
As shown in Figures 1 to 4, the present embodiment provides a kind of device of pernicious gas in draining-off sewage pipe network, the device point
Not She Yu inspection shaft 3, on the breather pipe 5 and soil stack 4 of building, inspection shaft 3 is on sewage main pipe 1, sewage trunk
Pipe 1 is tilted horizontal by the gradient；The device includes gas skirt 6 and rotation blast cap 7, and gas skirt 6 is located in inspection shaft 3, is checked
One end of breather pipe 5 on the well lid 3-1 sealings of well, the downstream building of sewage main pipe 1 is connected to collection by a connecting tube 9
On gas hood 6, rotation blast cap 7 is located at the other end of breather pipe 5, and soil stack 4 goes out family pipe 8 by one and is connected on inspection shaft 3, arranges
Current in water standpipe 4 from top to down free-electron model when bring ambient atmos into inspection shaft 3 and constantly accumulate, with air pressure not
Disconnected rise, the pernicious gas for promoting the inside of sewage main pipe 1 to accumulate is moved along water (flow) direction, gas skirt 6 collects sewage master
Gas in main is discharged by breather pipe 5；
Soil stack 4 on the upstream building of sewage main pipe 1 is connected on inspection shaft 3 by going out family pipe 8.Inspection shaft
Open hole 3-2 on well lid 3-1 is sealed by closing cover 3-3；Closing cover 3-3 includes cap 3-3-1, cap handle 3-3-2 and lancet
3-3-3, cap handle 3-3-2 are connected to cap 3-3-1 one end, and lancet 3-3-3 is located at the cap 3-3-2 other ends.Cap 3-3-2 is in umbrella
Shape, cap 3-3-2, which is provided with groove 3-3-4, groove 3-3-4, is provided with rotating shaft 3-3-5, and lancet 3-3-3 is connected to rotating shaft 3-3-5
On.The set location of gas skirt 6 is higher than the peak level being likely to occur in inspection shaft.
The difference of another technical scheme and embodiment 1 is：Rotate blast cap 7 and be provided with an auxiliary tube 7-1, auxiliary tube
7-1 one end is placed in breather pipe 5, and the auxiliary tube 7-1 other end passes through rotation blast cap.
Embodiment 3
The present embodiment provides a kind of pernicious gas method in draining-off sewage pipe network, using the device described in embodiment 2, including
Following steps：The concentration of pernicious gas first in detection sewage main pipe；Typically, when people start to smell near inspection shaft it is unpleasant
Smell when, show that the concentration of pernicious gas (hydrogen sulfide) herein alreadys exceed 0.41ppm, now, by the draining on building
Standpipe 4 is connected on inspection shaft 3 by going out family pipe 8；The bottom connection of breather pipe 5 on the downstream building of sewage main pipe 1
Gas skirt 6, sets rotation blast cap 7 in the other end of breather pipe 5, the well lid 3-1 of inspection shaft 3 is sealed so that pernicious gas converges
Gather in sewage main pipe 1, the gas carried when the current free-electron model from top to down in soil stack 4 is constantly in inspection shaft
Interior accumulation, forms draught head, and the pernicious gas for promoting the inside of sewage main pipe 1 to accumulate is moved along water (flow) direction, finally by
Gas skirt 6 collects the gas in sewage main pipe, and is discharged by breather pipe 6.
In order to verify that the free-falling of current in soil stack can make the gas in soil stack enter inspection shaft, so that
The gas flowing in sewage main pipe is promoted, 2 groups of field tests have been carried out.Battery of tests is on the roof of a 7 floor building
Carry out, air pressure and wind speed change at test ceiling duct；Second group of experiment goes out the inspection shaft that family pipe is connect in the building
Nearby carry out, air pressure and wind speed change at test open hole.
The result of battery of tests shows：In soil stack in the natural dropping process of current, 760.96 are had~
1020.4L gas is inhaled into soil stack, also implies that the gas of almost same volume enters inspection shaft.Second group real
The result tested shows：In the case of inspection shaft is no sealedly, 6% gas overflows out of inspection shaft open hole, 94%
Gas is moved along sewage main pipe headroom, top of the gas that this part enters in inspection shaft all along sewage main pipe
Portion space is moved, therefore, and the present invention in open hole by setting closing cover 3-3 so that the gas that this part enters in inspection shaft
Body is moved all along the headroom of sewage main pipe, so as to be played a role in promoting to original pernicious gas in inspection shaft.
In addition, the other inspection shaft composition of gases within of building and concentration are detected before and after testing, as a result shown at building other two
H in inspection shaft2S and CH4The pernicious gas that concentration is all reduced in 0, i.e. the sewage main pipe of the inventive method processing obtains bright
Aobvious reduction.
Claims (9)
1. a kind of pernicious gas method in draining-off sewage pipe network, this method is to the draining on sewage main pipe, inspection shaft, building
Standpipe and breather pipe are handled, it is characterised in that：Comprise the following steps：
Soil stack on building is connected on inspection shaft, the breather pipe of sewage main pipe downstream building is connected to dirt
On water main pipe, inspection shaft is sealed so that gas is converged in sewage main pipe；Soil stack is in drainage procedure by the external world
Gas is brought into inspection shaft, as air pressure is constantly raised in inspection shaft, drives sewage main pipe internal gas flow, eventually through
Breather pipe is discharged.
2. the method for pernicious gas in draining-off sewage pipe network as claimed in claim 1, it is characterised in that：It is connected on inspection shaft
The architectural soil stack in the preferred sewage main pipe upstream of soil stack.
3. the method for pernicious gas in draining-off sewage pipe network as claimed in claim 1, it is characterised in that：Set in ventilation pipe end
There is gas skirt (6), the position of described gas skirt is higher than the peak level in inspection shaft, and breather pipe top is provided with rotation blast cap
(7), the gas inside sewage main pipe is flowed to along water (flow) direction at the breather pipe in sewage main pipe downstream, in gas skirt and rotation
Turn in the presence of blast cap so that gas is discharged by breather pipe.
4. a kind of device of pernicious gas in draining-off sewage pipe network, the device is respectively arranged on inspection shaft (3), the breather pipe of building
(5) and on soil stack (4), described inspection shaft is on sewage main pipe (1), it is characterised in that：The device includes gas collection
Cover (6), rotation blast cap (7) and closing cover (3-3)；
Described gas skirt (6) is located in inspection shaft (3), and described gas skirt (6) is connected to sewage main pipe (1) downstream building
Breather pipe (5) one end on thing, described rotation blast cap (7) is located at the other end of breather pipe (5)；
Described soil stack (4) is turned on inspection shaft (3)；
Described inspection shaft is sealed by closing cover (3-3).
5. the device of pernicious gas in draining-off sewage pipe network as claimed in claim 4, it is characterised in that：Described sewage trunk
Soil stack (4) on pipe (1) upstream building goes out family pipe (8) by one and is connected on inspection shaft (3).
6. the device of pernicious gas in draining-off sewage pipe network as claimed in claim 4, it is characterised in that：Described inspection shaft well
The open hole (3-2) covered on (3-1) is sealed by closing cover (3-3)；Described closing cover (3-3) includes cap (3-3-1), cap
Handle (3-3-2) and lancet (3-3-3), described cap handle (3-3-2) are connected to cap (3-3-1) one end, described lancet (3-3-
3) it is located at cap (3-3-2) other end.
7. the device of pernicious gas in draining-off sewage pipe network as claimed in claim 6, it is characterised in that：Described cap (3-
It is in 3-2) umbrella, described cap (3-3-2), which is provided with groove (3-3-4), described groove (3-3-4), is provided with rotating shaft (3-
3-5), described lancet (3-3-3) is connected in rotating shaft (3-3-5).
8. the device of pernicious gas in draining-off sewage pipe network as claimed in claim 4, it is characterised in that：Described gas skirt
(6) position is higher than the peak level in inspection shaft.
9. the device of pernicious gas in draining-off sewage pipe network as claimed in claim 4, it is characterised in that：Described rotation blast cap
(7) be provided with an auxiliary tube (7-1), one end of described auxiliary tube (7-1) is placed in breather pipe (5), auxiliary tube (7-1) it is another
One end passes through rotation blast cap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710522688.3A CN107268765A (en) | 2017-06-30 | 2017-06-30 | The method and device of pernicious gas in a kind of draining-off sewage pipe network |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710522688.3A CN107268765A (en) | 2017-06-30 | 2017-06-30 | The method and device of pernicious gas in a kind of draining-off sewage pipe network |
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| Publication Number | Publication Date |
|---|---|
| CN107268765A true CN107268765A (en) | 2017-10-20 |
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ID=60070295
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710522688.3A Pending CN107268765A (en) | 2017-06-30 | 2017-06-30 | The method and device of pernicious gas in a kind of draining-off sewage pipe network |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107940150A (en) * | 2017-12-08 | 2018-04-20 | 中色科技股份有限公司 | Pressure relief device and method for connecting pressure flow pipeline into non-pressure flow pipeline |
| CN109252577A (en) * | 2018-09-27 | 2019-01-22 | 西安建筑科技大学 | The device of the dirty direct-connected organized degasification of system of rain |
| CN110164100A (en) * | 2019-06-25 | 2019-08-23 | 重庆市农业机械化学校 | A kind of electronic alerts device |
| CN110470793A (en) * | 2018-05-10 | 2019-11-19 | 北京市劳动保护科学研究所 | A kind of municipal sewage pipe network toxic and harmful gas regularity of distribution test device and method |
| CN112252371A (en) * | 2020-09-16 | 2021-01-22 | 西安建筑科技大学 | Pulse type air-supplementing municipal sewage well cover |
| CN114775693A (en) * | 2022-06-21 | 2022-07-22 | 江苏华昇新材料科技有限公司 | Rapid-installation inspection well combined mechanism made of SMC/BMC |
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| GB113475A (en) * | 1917-02-20 | 1918-02-20 | William Bell | Improvements in or relating to Ventilating Apparatus. |
| EP2767641A1 (en) * | 2011-10-13 | 2014-08-20 | Tokyo Metropolitan Sewerage Service Corporation | Fan and ventilation system |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107940150A (en) * | 2017-12-08 | 2018-04-20 | 中色科技股份有限公司 | Pressure relief device and method for connecting pressure flow pipeline into non-pressure flow pipeline |
| CN110470793A (en) * | 2018-05-10 | 2019-11-19 | 北京市劳动保护科学研究所 | A kind of municipal sewage pipe network toxic and harmful gas regularity of distribution test device and method |
| CN109252577A (en) * | 2018-09-27 | 2019-01-22 | 西安建筑科技大学 | The device of the dirty direct-connected organized degasification of system of rain |
| CN110164100A (en) * | 2019-06-25 | 2019-08-23 | 重庆市农业机械化学校 | A kind of electronic alerts device |
| CN110164100B (en) * | 2019-06-25 | 2020-11-17 | 重庆市农业机械化学校 | Electronic alarm device |
| CN112252371A (en) * | 2020-09-16 | 2021-01-22 | 西安建筑科技大学 | Pulse type air-supplementing municipal sewage well cover |
| CN114775693A (en) * | 2022-06-21 | 2022-07-22 | 江苏华昇新材料科技有限公司 | Rapid-installation inspection well combined mechanism made of SMC/BMC |
| CN114775693B (en) * | 2022-06-21 | 2022-10-11 | 江苏华昇新材料科技有限公司 | Quick-assembly inspection well combined mechanism made of SMC/BMC |
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