CN213273048U - Ventilation and noise reduction device for underground fire-fighting engineering - Google Patents
Ventilation and noise reduction device for underground fire-fighting engineering Download PDFInfo
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- CN213273048U CN213273048U CN202021809337.4U CN202021809337U CN213273048U CN 213273048 U CN213273048 U CN 213273048U CN 202021809337 U CN202021809337 U CN 202021809337U CN 213273048 U CN213273048 U CN 213273048U
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- ventilation
- noise reduction
- adapter sleeve
- interior pipeline
- return bend
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- 238000009423 ventilation Methods 0.000 title claims abstract description 71
- 238000010438 heat treatment Methods 0.000 claims abstract description 6
- 230000017525 heat dissipation Effects 0.000 claims description 10
- 239000000919 ceramic Substances 0.000 claims description 8
- 238000009413 insulation Methods 0.000 claims description 6
- 230000002265 prevention Effects 0.000 claims description 3
- 239000006261 foam material Substances 0.000 claims description 2
- 230000030279 gene silencing Effects 0.000 description 9
- 238000010586 diagram Methods 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 230000003584 silencer Effects 0.000 description 1
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- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
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Claims (7)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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CN202021809337.4U CN213273048U (en) | 2020-08-26 | 2020-08-26 | Ventilation and noise reduction device for underground fire-fighting engineering |
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CN202021809337.4U CN213273048U (en) | 2020-08-26 | 2020-08-26 | Ventilation and noise reduction device for underground fire-fighting engineering |
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CN213273048U true CN213273048U (en) | 2021-05-25 |
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CN202021809337.4U Active CN213273048U (en) | 2020-08-26 | 2020-08-26 | Ventilation and noise reduction device for underground fire-fighting engineering |
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CN (1) | CN213273048U (en) |
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2020
- 2020-08-26 CN CN202021809337.4U patent/CN213273048U/en active Active
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Legal Events
Date | Code | Title | Description |
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GR01 | Patent grant | ||
GR01 | Patent grant | ||
PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A ventilation and noise reduction device for underground fire engineering Effective date of registration: 20220110 Granted publication date: 20210525 Pledgee: Branches of Jinan Rural Commercial Bank Co.,Ltd. Pledgor: Shandong Jianfeng Fire Engineering Co.,Ltd. Registration number: Y2022980000235 |
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PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20221231 Granted publication date: 20210525 Pledgee: Branches of Jinan Rural Commercial Bank Co.,Ltd. Pledgor: Shandong Jianfeng Fire Engineering Co.,Ltd. Registration number: Y2022980000235 |
|
PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A ventilation and noise reduction device for underground fire engineering Effective date of registration: 20230117 Granted publication date: 20210525 Pledgee: Branches of Jinan Rural Commercial Bank Co.,Ltd. Pledgor: Shandong Jianfeng Fire Engineering Co.,Ltd. Registration number: Y2023980031529 |
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PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20231228 Granted publication date: 20210525 Pledgee: Branches of Jinan Rural Commercial Bank Co.,Ltd. Pledgor: Shandong Jianfeng Fire Engineering Co.,Ltd. Registration number: Y2023980031529 |
|
PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A ventilation and noise reduction device for underground fire protection engineering Effective date of registration: 20231229 Granted publication date: 20210525 Pledgee: Branches of Jinan Rural Commercial Bank Co.,Ltd. Pledgor: Shandong Jianfeng Fire Engineering Co.,Ltd. Registration number: Y2023980075731 |
|
PE01 | Entry into force of the registration of the contract for pledge of patent right |