CN114113470B - Underground space condition detection system - Google Patents
Underground space condition detection system Download PDFInfo
- Publication number
- CN114113470B CN114113470B CN202111281218.5A CN202111281218A CN114113470B CN 114113470 B CN114113470 B CN 114113470B CN 202111281218 A CN202111281218 A CN 202111281218A CN 114113470 B CN114113470 B CN 114113470B
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- air
- pipe
- pressure plate
- hollow pressure
- protection cylinder
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- 238000001514 detection method Methods 0.000 title claims abstract description 59
- 238000004140 cleaning Methods 0.000 claims abstract description 19
- 239000000428 dust Substances 0.000 claims abstract description 18
- 238000001914 filtration Methods 0.000 claims abstract description 15
- 230000007246 mechanism Effects 0.000 claims description 6
- 239000000696 magnetic material Substances 0.000 claims description 5
- 238000007789 sealing Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 3
- 230000008569 process Effects 0.000 claims description 3
- 230000008859 change Effects 0.000 claims description 2
- 230000004907 flux Effects 0.000 claims description 2
- 230000001502 supplementing effect Effects 0.000 claims 1
- 230000035699 permeability Effects 0.000 abstract description 2
- 238000007599 discharging Methods 0.000 abstract 1
- 230000001681 protective effect Effects 0.000 description 9
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 3
- 235000017491 Bambusa tulda Nutrition 0.000 description 3
- 241001330002 Bambuseae Species 0.000 description 3
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 3
- 239000011425 bamboo Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000809 air pollutant Substances 0.000 description 2
- 231100001243 air pollutant Toxicity 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009469 supplementation Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B1/00—Cleaning by methods involving the use of tools, brushes, or analogous members
Abstract
The invention discloses an underground space condition detection system, which comprises a detection protection cylinder, wherein air detection equipment is arranged in the detection protection cylinder, an opening is formed in the lower end of the detection protection cylinder, a filter screen is embedded in the opening, a hollow pressure plate is slidably arranged in the detection protection cylinder, the lower end of the hollow pressure plate is fixedly connected with a plurality of cleaning plugs, a driving device for driving the hollow pressure plate to move up and down is arranged on the hollow pressure plate, the lower end of the detection protection cylinder is fixedly connected with a conical cylinder communicated with the opening, an air inlet is formed in the side wall of the conical cylinder, and a drain pipe is communicated with the lower end of the conical cylinder. The invention drives the driving device to operate by utilizing the exhaust fan when in operation, so that the hollow pressure plate can reciprocate up and down, and the cleaning plug continuously passes through the filtering hole of the filter screen, thereby ejecting the adhered dust and discharging the dust from the conical cylinder and the blow-off pipe, ensuring good air permeability of the filter screen, and ensuring that the detection equipment can accurately acquire the condition of underground air.
Description
Technical Field
The invention relates to the technical field related to underground space detection equipment, in particular to an underground space condition detection system.
Background
In the urban underground construction process, due to the environment sealing performance of an underground space and the poor nature condition of the underground, fresh air is required to be blown in continuously through the blowing equipment, and meanwhile, the underground air is required to be detected, so that the condition of pollutants in the air is monitored constantly.
However, a large amount of dust is generated during construction, and the detection device for detecting air pollutants is generally installed in a protection device with a dustproof filter screen, so that underground air can be detected, and adverse effects of dust on the detection device can be prevented. However, along with the increase of the service time, a large amount of dust is inevitably stained on the dustproof filter screen, so that the contact between the detection equipment and underground air is hindered, the detection equipment always detects the air in the protective device, the detection result is distorted, the monitoring effect on air pollutants is lost, and dangerous accidents are easily caused. Accordingly, the present application provides a system for detecting a condition of an underground space.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides an underground space condition detection system.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the underground space condition detection system comprises a detection protection cylinder, air detection equipment is arranged in the detection protection cylinder, an opening is formed in the lower end of the detection protection cylinder, a filter screen is embedded in the opening, a hollow pressure plate is slidably arranged in the detection protection cylinder, the lower end of the hollow pressure plate is fixedly connected with a plurality of cleaning plugs, a driving device for driving the hollow pressure plate to move up and down is arranged on the hollow pressure plate, the lower end of the detection protection cylinder is fixedly connected with a conical cylinder communicated with the opening, an air inlet is formed in the side wall of the conical cylinder, a blow-down pipe is communicated with the lower end of the conical cylinder, a fresh air groove is formed in the side wall of the detection protection cylinder, an exhaust fan is arranged in the fresh air groove, and a fresh air inlet pipe and a fresh air outlet pipe are respectively communicated with the top and the side wall in the fresh air groove.
Preferably, the driving device comprises an exhaust pipe fixedly arranged at the upper end of the hollow pressure plate and communicated with the inside of the hollow pressure plate, a corrugated pipe is communicated with the upper end of the exhaust pipe, an exhaust hole communicated with the inside of the hollow pressure plate is formed in the side wall of the cleaning plug, the aperture of the exhaust hole is smaller than the pipe diameter of the exhaust pipe, an air groove is formed in the side wall of the detection protection cylinder, and an exhaust mechanism for exhausting the corrugated pipe is arranged in the air groove.
Preferably, the exhaust mechanism comprises a sliding plug which is slidingly connected in an air groove, a reciprocating screw rod is rotationally connected in the air groove and is in sealing threaded connection with the sliding plug, the reciprocating screw rod is coaxially and fixedly connected with a rotating shaft of an exhaust fan, the air groove is communicated with a corrugated pipe through a one-way air outlet pipe, and a one-way air inlet pipe and an air guide pipe are respectively communicated with the bottom and the inner top in the air groove.
Preferably, the electric vibration sheet is arranged on the inner wall of the detection protection cylinder, the electric vibration sheet is propped against the filter screen, the sliding plug is made of magnetic materials, and the spiral coil coupled with the electric vibration sheet is embedded on the inner wall of the air groove.
Preferably, a guide groove is formed in the inner wall of the detection protection cylinder, a guide rod is slidably connected in the guide groove, and one end, away from the guide groove, of the guide rod is fixedly connected to the side wall of the hollow pressure plate.
Preferably, the lower end of the guide rod is fixedly connected with a spring, and the lower end of the spring is fixedly connected with the inner bottom of the detection protection cylinder.
The invention has the following beneficial effects:
1. through combining the exhaust fan with the detection protection cylinder, the driving device is driven to operate when the exhaust fan works, so that the hollow pressure plate can reciprocate up and down, the cleaning plug continuously passes through the filtering hole of the filter screen, and adhered dust is ejected out and discharged from the conical cylinder and the blow-down pipe, so that good air permeability of the filter screen is ensured, and the detection equipment can accurately acquire the condition of underground air;
2. by arranging the corrugated pipe, the exhaust pipe and the cleaning plug with the exhaust hole, the exhaust hole can continuously blow out air flow when the hollow pressure plate moves up and down, so that dust blocked on the filter screen can fall off, and the cleaning effect is improved;
3. by arranging the conical cylinder and arranging the air inlet on the side wall of the conical cylinder, not only can air be actively pumped into the detection protection cylinder for detection, the detection accuracy is improved, but also dust can be rapidly discharged during cleaning;
4. by arranging the spiral coil, the electric vibration sheet and other parts, part of kinetic energy can be converted into electric energy when the driving device runs, so that the electric vibration sheet is electrified and continuously pushes the filter screen to shake the filter screen, and dust on the filter screen is further promoted to fall off.
Drawings
FIG. 1 is a schematic diagram of a system for detecting conditions in an underground space according to the present invention;
FIG. 2 is a schematic diagram of the structure of a hollow platen and a cleaning plug of the underground space condition detection system according to the present invention;
FIG. 3 is an enlarged schematic view of the structure at A in FIG. 1;
fig. 4 is an enlarged schematic view of the structure at B in fig. 1.
In the figure: 1 detection protection cylinder, 2 openings, 3 filter screens, 4 hollow pressure plates, 5 exhaust pipes, 6 corrugated pipes, 7 one-way air outlet pipes, 8 fresh air grooves, 9 fresh air outlet pipes, 10 fresh air inlet pipes, 11 exhaust fans, 12 conical cylinders, 13 air inlets, 14 blow-down pipes, 15 cleaning plugs, 16 exhaust holes, 17 air grooves, 18 guide rods, 19 guide grooves, 20 springs, 21 detection equipment, 22 reciprocating screw rods, 23 sliding plugs, 24 air guide pipes, 25 spiral coils, 26 one-way air inlet pipes and 27 electric vibration plates.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.
In the description of the present invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present invention and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Referring to fig. 1-4, the underground space condition detecting system comprises a detecting protective cylinder 1, wherein an air detecting device 21 is arranged in the detecting protective cylinder 1, an opening 2 is formed in the lower end of the detecting protective cylinder 1, a filter screen 3 is embedded in the opening 2, a hollow pressure plate 4 is slidably arranged in the detecting protective cylinder 1, a guide groove 19 is formed in the inner wall of the detecting protective cylinder 1, a guide rod 18 is slidably connected in the guide groove 19, one end, far away from the guide groove 19, of the guide rod 18 is fixedly connected to the side wall of the hollow pressure plate 4, a spring 20 is fixedly connected to the lower end of the guide rod, and the lower end of the spring 20 is fixedly connected to the inner bottom of the detecting protective cylinder 1.
The lower extreme fixedly connected with of cavity pressure disk 4 clears up end cap 15, install the drive arrangement who drives its reciprocates on the cavity pressure disk 4, detect the lower extreme fixedly connected with of protective cylinder 1 and the communicating toper section of thick bamboo 12 of opening 2, air inlet 13 has been seted up to the lateral wall of toper section of thick bamboo 12, toper section of thick bamboo 12 lower extreme intercommunication has blow off pipe 14, fresh air groove 8 has been seted up to the lateral wall of protective cylinder 1, be equipped with air discharge fan 11 in the fresh air groove 8, the top has fresh air intake pipe 10 and fresh air outlet duct 9 with the lateral wall intercommunication respectively in the fresh air groove 8. It should be noted that, referring to fig. 1 and 2, the cleaning plugs 15 and the filtering holes on the filtering net 3 are in one-to-one correspondence, the filtering holes on the filtering net 3 are only arranged at the middle part of the filtering net 3, and the air inlets 13 are arranged at two sides of the edge of the cone 12, so that the dust falling off from the filtering holes can fall into the middle of the cone 12 and be discharged from the drain pipe 14.
The driving device comprises an exhaust pipe 5 fixedly arranged at the upper end of the hollow pressure plate 4 and communicated with the inside of the hollow pressure plate, a corrugated pipe 6 is communicated with the upper end of the exhaust pipe 5, an exhaust hole 16 communicated with the inside of the hollow pressure plate 4 is formed in the side wall of the cleaning plug 15, and the aperture of the exhaust hole 16 is smaller than the pipe diameter of the exhaust pipe 5.
The side wall of the detection protection cylinder 1 is provided with an air groove 17, an exhaust mechanism for exhausting air to the corrugated pipe 6 is arranged in the air groove 17, the exhaust mechanism comprises a sliding plug 23 which is connected in the air groove 17 in a sliding way, a reciprocating screw 22 is connected in the air groove 17 in a rotating way, and the reciprocating screw 22 is in sealing threaded connection with the sliding plug 23. It should be noted that, because the aperture of the exhaust hole 16 is smaller than the pipe diameter of the exhaust pipe 5, and the exhaust amount of the exhaust hole 16 is smaller than the air intake amount of the exhaust pipe 5, air cannot be completely exhausted and accumulated in the corrugated pipe 6, so that the air pressure in the corrugated pipe 6 can be increased to force the corrugated pipe 6 to stretch, and the unidirectional air outlet pipe 7 is fixed, so that the hollow pressure plate 4 is pushed to move downwards. Furthermore, the unidirectional air inlet pipe 26 enables air to flow into the air groove 17 from the unidirectional air inlet pipe 26 only, and the unidirectional air outlet pipe 7 enables air to flow into the unidirectional air outlet pipe 7 from the air groove 17 only in one direction, and in addition, in the device, the unidirectional air outlet pipe 7 can push the hollow pressure plate 4 to move downwards for cleaning when exhausting, and cleaning is not performed when the unidirectional air inlet pipe 26 sucks air, so that the cleaned and fallen dust can be discharged from the conical cylinder 12 and the blow-off pipe 14 for enough time, and secondary pollution can not be caused.
The rotating shaft of the reciprocating screw 22 is fixedly connected with the rotating shaft of the exhaust fan 11 coaxially, the air groove 17 is communicated with the corrugated pipe 6 through a one-way air outlet pipe 7, and the inner bottom and the inner top of the air groove 17 are respectively communicated with a one-way air inlet pipe 26 and an air guide pipe 24. By providing the air duct 24, the space above the slide plug 23 can be communicated with the outside, and the slide plug 23 can be free from obstruction when moving up and down. Further, the thread of the reciprocating screw 22 is provided only at the middle portion, as shown in fig. 4, so that the upper end of the reciprocating screw 22 can be sealed to penetrate the inner top of the air groove 17 and be axially connected with the rotation shaft of the exhaust fan 11.
In the invention, after the exhaust fan 11 is started, the fresh air on the ground can be continuously pumped in by the fresh air inlet pipe 10 and is discharged into the underground space from the fresh air outlet pipe 9, so that the fresh and clean underground air can be kept.
In this process, the rotating shaft of the exhaust fan 11 drives the reciprocating screw 22 to rotate continuously, so that the sliding plug 23 screwed with the reciprocating screw 22 moves up and down in the air groove 17, and air is continuously sucked from the unidirectional air inlet pipe 26 and then discharged from the unidirectional air outlet pipe 7. When air is sucked from the unidirectional air inlet pipe 26, external underground air passes through the air inlet 13 and the filter screen 3 to enter the detection protection cylinder 1 for supplementation, so that the detection equipment 21 arranged in the detection protection cylinder 1 can sense the condition of the underground air at the first time, and the monitoring accuracy of the detection equipment 21 on the underground air is improved.
And when air is discharged from the unidirectional air outlet pipe 7, the air can be blown into the corrugated pipe 6 and discharged into the hollow pressure plate 4 through the air outlet pipe 5, and finally discharged through the air outlet hole 16, because the aperture of the air outlet hole 16 is smaller than the aperture of the air outlet pipe 5, most of air can not be completely discharged at any time when the air is blown into the corrugated pipe 6, the air gradually gathers in the corrugated pipe 6, the corrugated pipe 6 stretches and pushes the hollow pressure plate 4 to move downwards, the cleaning plug 15 at the lower end of the hollow pressure plate 4 passes through the filtering hole of the filtering net 3 to clean dust blocked in the filtering hole, and the dust is discharged from the blow-off pipe 14 in the conical cylinder 12 below, and when the air is discharged from the air outlet hole 16, the air flow can also perform blowing cleaning on the filtering net 3 to promote the dust adhered on the filtering net 3 to drop. When the sliding plug 23 moves upwards again, when air is sucked in from the unidirectional air inlet pipe 26, the unidirectional air outlet pipe 7 also stops air inlet to the corrugated pipe 6, the residual air in the corrugated pipe 6 is gradually discharged, and the spring 20 can push the hollow pressure plate 4 to move upwards for resetting and simultaneously enable the corrugated pipe 6 to shrink. And because the sliding plug 23 is made of magnetic materials, when the sliding plug 23 reciprocates up and down, the sliding plug can continuously enter and exit the spiral coil 25 so as to cause the magnetic flux in the spiral coil 25 to continuously change, the spiral coil 25 can generate induced current and enable the electric vibration plate 27 to be electrified so as to vibrate, and thus the upper filter screen 3 can be continuously pushed to promote the dust adhered on the filter screen 3 to fall off.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (1)
1. The underground space condition detection system comprises a detection protection cylinder (1), wherein an air detection device (21) is arranged in the detection protection cylinder (1), and is characterized in that an opening (2) is formed in the lower end of the detection protection cylinder (1), a filter screen (3) is embedded in the opening (2), a hollow pressure plate (4) is arranged in the detection protection cylinder (1) in a sliding mode, a plurality of cleaning plugs (15) are fixedly connected to the lower end of the hollow pressure plate (4), a driving device for driving the hollow pressure plate (4) to move up and down is arranged on the hollow pressure plate (4), a conical cylinder (12) communicated with the opening (2) is fixedly connected to the lower end of the detection protection cylinder (1), an air inlet (13) is formed in the side wall of the conical cylinder (12), a drain pipe (14) is communicated with the lower end of the conical cylinder (12), a fresh air groove (8) is formed in the side wall of the detection protection cylinder (1), an exhaust fan (11) is arranged in the fresh air groove (8), and the top of the fresh air groove (8) is respectively communicated with a fresh air outlet pipe (10) and a fresh air outlet pipe (9).
The driving device comprises an exhaust pipe (5) fixedly arranged at the upper end of the hollow pressure plate (4) and communicated with the inside of the hollow pressure plate, a corrugated pipe (6) is communicated with the upper end of the exhaust pipe (5), an exhaust hole (16) communicated with the inside of the hollow pressure plate (4) is formed in the side wall of the cleaning plug (15), the aperture of the exhaust hole (16) is smaller than the pipe diameter of the exhaust pipe (5), an air groove (17) is formed in the side wall of the detection protection cylinder (1), and an exhaust mechanism for exhausting the corrugated pipe (6) is arranged in the air groove (17);
the exhaust mechanism comprises a sliding plug (23) which is slidably connected in an air groove (17), a reciprocating screw rod (22) is rotationally connected in the air groove (17), the reciprocating screw rod (22) is in sealing threaded connection with the sliding plug (23), the reciprocating screw rod (22) is fixedly connected with a rotating shaft of an exhaust fan (11) coaxially, the air groove (17) is communicated with a corrugated pipe (6) through a one-way air outlet pipe (7), and a one-way air inlet pipe (26) and an air guide pipe (24) are respectively communicated with the inner bottom and the inner top of the air groove (17);
an electric vibration sheet (27) is arranged on the inner wall of the detection protection cylinder (1), the electric vibration sheet (27) is propped against the filter screen (3), the sliding plug (23) is made of a magnetic material, and a spiral coil (25) coupled with the electric vibration sheet (27) is embedded on the inner wall of the air groove (17);
a guide groove (19) is formed in the inner wall of the detection protection cylinder (1), a guide rod (18) is connected in a sliding manner in the guide groove (19), and one end, away from the guide groove (19), of the guide rod (18) is fixedly connected to the side wall of the hollow pressure plate (4);
the lower end of the guide rod is fixedly connected with a spring (20), and the lower end of the spring (20) is fixedly connected to the inner bottom of the detection protection cylinder (1);
after the exhaust fan (11) is started, the fresh air on the ground is continuously pumped in by the fresh air inlet pipe (10) and is discharged into the underground space from the fresh air outlet pipe (9), so that the underground air is kept fresh and clean;
in the process, the rotating shaft of the exhaust fan (11) drives the reciprocating screw (22) to continuously rotate, so that a sliding plug (23) in threaded connection with the reciprocating screw (22) moves up and down in the air groove (17), air is continuously sucked from the one-way air inlet pipe (26) and is discharged from the one-way air outlet pipe (7), and whenever the air is sucked from the one-way air inlet pipe (26), external underground air passes through the air inlet (13) and the filter screen (3) to enter the detection protection cylinder (1) for supplementing, and the detection equipment (21) arranged in the detection protection cylinder (1) senses the condition of underground air at the first time, so that the monitoring accuracy of the detection equipment (21) on the underground air is improved;
when air is discharged from the unidirectional air outlet pipe (7), the air is blown into the corrugated pipe (6) and is discharged from the air outlet pipe (5) into the hollow pressure plate (4) and finally discharged through the air outlet hole (16), as the aperture of the air outlet hole (16) is smaller than the aperture of the air outlet pipe (5), when the air is blown into the corrugated pipe (6), the air cannot be completely discharged at one time, the air gradually gathers in the corrugated pipe (6), the corrugated pipe (6) stretches and pushes the hollow pressure plate (4) to move downwards, a cleaning plug (15) at the lower end of the hollow pressure plate (4) passes through a filtering hole of a filter screen (3) to clean dust blocked in the filtering hole and is discharged from a conical cylinder (12) below by a blow-off pipe (14), when the air is discharged from the air outlet hole (16), the air flow also blows and cleans the filter screen (3) so as to promote the dust adhered on the filter screen (3) to fall off, when the air is sucked up again from the unidirectional air inlet pipe (26), the unidirectional pressure plate (7) stops sucking the air from the air outlet pipe (26), the air outlet pipe (7) also slides downwards, and simultaneously slides back and forth on the hollow pressure plate (23) to the hollow pressure plate (4) to slide down, and the air inlet pipe (23) is made into the magnetic material (20) due to the fact that the magnetic material is gradually slides downwards and the air inlet pipe (4), the spiral coil (25) is continuously moved in and out to cause the magnetic flux in the spiral coil (25) to continuously change, the spiral coil (25) generates induced current and electrifies the electric vibration sheet (27) to vibrate, so that the upper filter screen (3) is continuously pushed up to promote the dust adhered on the filter screen (3) to fall off.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111281218.5A CN114113470B (en) | 2021-11-01 | 2021-11-01 | Underground space condition detection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111281218.5A CN114113470B (en) | 2021-11-01 | 2021-11-01 | Underground space condition detection system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114113470A CN114113470A (en) | 2022-03-01 |
| CN114113470B true CN114113470B (en) | 2024-03-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111281218.5A Active CN114113470B (en) | 2021-11-01 | 2021-11-01 | Underground space condition detection system |
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| Country | Link |
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| CN (1) | CN114113470B (en) |
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| FR791075A (en) * | 1934-06-12 | 1935-12-02 | Lampes Sa | Process and control devices in the manufacture of incandescent lamps |
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| CN211069430U (en) * | 2019-11-08 | 2020-07-24 | 江苏源古环保设备有限公司 | Industrial waste gas purification device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR791075A (en) * | 1934-06-12 | 1935-12-02 | Lampes Sa | Process and control devices in the manufacture of incandescent lamps |
| US4826512A (en) * | 1988-10-19 | 1989-05-02 | Fuller Carmel U | Self-cleaning air filter |
| JPH06339603A (en) * | 1993-05-31 | 1994-12-13 | Shigemi Kageyama | Self-washing high performance inclined screen |
| KR20120040895A (en) * | 2010-10-20 | 2012-04-30 | 동이월드 주식회사 | Indoor air ventilating apparatus with air exhausting means |
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| CN212180735U (en) * | 2020-04-09 | 2020-12-18 | 蒋妃秋 | Gas detector erection equipment for coal mine |
| CN212180736U (en) * | 2020-04-17 | 2020-12-18 | 上海摩威环境科技股份有限公司 | Waste gas on-line detection device |
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| CN112833504A (en) * | 2021-01-28 | 2021-05-25 | 刘磊 | Low-loss filter element type air purifier |
| CN113019017A (en) * | 2021-03-04 | 2021-06-25 | 浙江环森环境科技有限公司 | Air purification filter for environmental protection engineering and use method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114113470A (en) | 2022-03-01 |
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