CN115853105A - Protection device for highway engineering of rigid structure - Google Patents

Protection device for highway engineering of rigid structure Download PDF

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Publication number
CN115853105A
CN115853105A CN202310044403.5A CN202310044403A CN115853105A CN 115853105 A CN115853105 A CN 115853105A CN 202310044403 A CN202310044403 A CN 202310044403A CN 115853105 A CN115853105 A CN 115853105A
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China
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fixedly connected
shell
fixing ring
frame
fixed surface
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CN202310044403.5A
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CN115853105B (en
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吴海
孔凡德
王静
胡幼刚
昝震亮
李芳芳
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Hebei Bosi Technology Co ltd
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Hebei Bosi Technology Co ltd
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E50/00Technologies for the production of fuel of non-fossil origin
    • Y02E50/30Fuel from waste, e.g. synthetic alcohol or diesel

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Abstract

The invention discloses a protective device with a rigid structure for highway engineering, and relates to the technical field of highway engineering. This protector for highway engineering of rigid structure, including first shell, the last fixed surface of first shell is connected with the second shell, the inner chamber department fixedly connected with marsh gas purifier of second shell, the external fixed surface of first shell is connected with the supporting leg, the first elastic frame of lower fixed surface of supporting leg is connected with, the one end fixedly connected with slipmat of supporting leg is kept away from to first elastic frame, the lower fixed surface of first shell is connected with entrance to a cave fixing device, the external fixed surface of first shell is connected with the support ring, the lower fixed surface of support ring is connected with the cushion, entrance to a cave fixing device includes first solid fixed ring, first solid fixed ring fixed connection is at the lower surface of first shell, reaches and purifies marsh gas under playing the protective effect.

Description

Protection device for highway engineering of rigid structure
Technical Field
The invention relates to the technical field of highway engineering, in particular to a protective device with a rigid structure for highway engineering.
Background
The sewer is an urban public facility and refers to a pipeline for discharging sewage and rainwater from a building; also refers to an underground passage for discharging sewage and rainwater in a city, a factory area or a village, and a sewer is a public facility in the city, and urban waste water is counted for when the city rains). Sewer pipe blockage is a common problem in daily life, and sewer dredging is generally divided into several types: when a pipeline is newly installed, foreign matters are carelessly dropped in or blockage is caused by installation errors, and a pipeline dredging machine is generally adopted to directly dredge or replace the pipeline; some pipelines can be scaled after being used for a period of time, so that the inner diameter of the pipeline becomes thin to influence normal drainage, and the pipeline is cleaned by high-pressure water to remove dirt on the inner wall of the pipeline so as to enlarge the inner diameter of the sewer pipeline;
workers need to maintain the manhole on the highway sometimes, and the manhole cover needs to be removed during maintenance, so that the exposed manhole can harm pedestrians and vehicles; most of the manhole maintenance and protection devices in the market surround the manhole, and do not purify methane in the manhole.
Disclosure of Invention
In order to achieve the purpose, the invention is realized by the following technical scheme: the utility model provides a protector for highway engineering of rigid structure, includes first shell, the last fixed surface of first shell is connected with the second shell, the inner chamber department fixedly connected with marsh gas purifier of second shell, the outer fixed surface of first shell is connected with the supporting leg, the lower fixed surface of supporting leg is connected with first elastic frame, the one end fixedly connected with slipmat of supporting leg is kept away from to first elastic frame.
Preferably, the lower fixed surface of first shell is connected with entrance to a cave fixing device, the outer fixed surface of first shell is connected with the support ring, the lower fixed surface of support ring is connected with the cushion, through setting up first elastic frame, slipmat, support ring and cushion, can make the device place when the well lid mouth, can play the fixed effect of support to the device, prevents to make the device produce the skew because the vehicle striking, places after the entrance to a cave when the device, and first elastic frame can produce under the influence of device gravity and warp to make the device keep balance.
Preferably, entrance to a cave fixing device includes first solid fixed ring, first solid fixed ring fixed connection is at the lower surface of first shell, first solid fixed ring's lower fixed surface is connected with hole wall clamping device, through setting up entrance to a cave fixing device, can make device and pit tightly fixed together to play the warning effect to the pit, prevent pedestrian and vehicle striking.
Preferably, the hole wall clamping device comprises a first supporting rod, a first fixing block is fixedly connected to the top end of the first supporting rod, a second elastic frame is fixedly connected to the outer surface of the first fixing block, an extrusion plate is fixedly connected to one end, away from the first fixing block, of the second elastic frame, a first elastic sheet is fixedly connected to the outer surface of the extrusion plate, and a fixing nail is fixedly connected to one end, away from the extrusion plate, of the first elastic sheet.
Preferably, one side fixedly connected with extrusion piece that the staple was kept away from to the stripper plate surface, the bottom fixedly connected with second fixed block of first bracing piece, one side fixedly connected with adaptation piece that first bracing piece was kept away from to second fixed block surface, the external surface fixedly connected with spring of adaptation piece, the one end fixed connection that the adaptation piece was kept away from to the spring can make the device tightly fix in the hole wall department of pubic shaft through setting up hole wall clamping device, and during the use, operating personnel placed the device in the hole wall department of pubic shaft, and under the effect of second elastic rack, spring and first shell fragment, the stripper plate is driving the staple and is extrudeing mutually with the hole wall to make the staple tightly extrude mutually with the hole wall, reach fixing device's effect.
Preferably, the bottom end of the hole wall clamping device is fixedly connected with a second fixing ring, the lower surface of the second fixing ring is fixedly connected with a second elastic sheet, the bottom end of the second elastic sheet is fixedly connected with a third fixing ring, the inner wall of the third fixing ring is fixedly connected with a guide plate, and the guide plate and the second elastic sheet are arranged to enable the device to be placed at the position of the hole wall of the pit more easily.
Preferably, marsh gas purifier includes first support frame, first support frame fixed connection is in the inner wall department of second shell, the one end fixedly connected with extraction fan that the second shell was kept away from to first support frame, through setting up the extraction fan, can make outside the gas emission in the anion well to the anion well, during the use, operating personnel makes the extraction fan insert the power to open the switch of extraction fan, the extraction fan begins work, thereby makes the air discharge in the anion well, and then ensures maintenance personal's maintenance safety.
Preferably, the biogas purification device comprises a second support frame, the second support frame is fixedly connected to the inner wall of the first shell, one end, far away from the first shell, of the second support frame is fixedly connected with a fourth fixing ring, the inner cavity bottom surface of the fourth fixing ring is fixedly connected with a placing frame, the inner cavity of the placing frame is fixedly connected with a fifth fixing ring, the upper surface of the fifth fixing ring is fixedly connected with an active carbon block, the frame and the active carbon block are placed through arrangement, biogas in a pit can be purified, under the action of an air suction fan, air in the pit can be drawn out and is in contact with the active carbon block, and therefore the air purification effect is achieved.
Preferably, the lower fixed ring's of fourth fixed ring lower surface is connected with the second bracing piece, second bracing piece bottom end fixedly connected with funnel, the axle center department fixedly connected with air duct of funnel upper surface, the air duct runs through the funnel, the air duct runs through places the frame, the top fixedly connected with of air duct gathers the case, the last fixed surface of gathering the case is connected with the outlet duct, the outlet duct runs through and gathers the case, the outlet duct is kept away from the one end fixedly connected with gas outlet of gathering the case, and the setting of funnel, air duct, gathering the case and gas outlet can make the air get into among the funnel, and rethread air duct and gathering the case blow to the surface of active carbon piece from outlet duct and gas outlet to reach air-purifying's effect.
The invention provides a protective device with a rigid structure for highway engineering. The method has the following beneficial effects:
1. this protector for highway engineering of rigid structure through setting up first elastic carrier, slipmat, support ring and cushion, can make the device place in the well lid mouth, can play the fixed effect of support to the device, prevents to make the device produce the skew because the vehicle striking, places after the entrance to a cave as the device, and first elastic carrier can produce the deformation under the influence of device gravity to make the device keep balance.
2. This protector for highway engineering of rigid structure through setting up hole wall clamping device, can make the device tightly fix in the hole wall department of pubic shaft, and during the use, operating personnel places the device in the hole wall department of pubic shaft, and under the effect of second elastic frame, spring and first shell fragment, the stripper plate is driving the staple and is extrudeing mutually with the hole wall to make the staple tightly extrude mutually with the hole wall, reach fixing device's effect.
3. This protector for highway engineering of rigid structure, fan through setting up the extraction, can make the gas in the cloudy well discharge outside the cloudy well, during the use, operating personnel makes the extraction fan insert the power, and open the switch of the fan of extracting air, the extraction fan begins work, thereby make the air escape in the cloudy well, and then ensure maintenance personal's maintenance safety, place frame and active carbon piece through the setting, can purify marsh gas among the cloudy well, under the effect of the fan of extracting air, air among the cloudy well can be taken out, and contact with active carbon piece, thereby reach the purifying effect to the air.
4. This protector for highway engineering of rigid structure through the setting of funnel, air duct, collection case and gas outlet, can make during the air admission funnel, rethread air duct and collection case blow to the surface of active carbon piece from outlet duct and gas outlet to reach air-purifying's effect.
Drawings
FIG. 1 is a schematic structural view of a rigid highway engineering protection device of the present invention;
FIG. 2 is a schematic side view of the present invention;
FIG. 3 is a schematic structural view of the present invention in operation;
FIG. 4 is a schematic structural view of the hole fixing device of the present invention;
FIG. 5 is a schematic structural view of a hole wall clamping device according to the present invention;
FIG. 6 is a schematic view of the structure of the biogas purification device of the present invention;
FIG. 7 is a detailed structure diagram of the biogas purification device of the present invention;
fig. 8 is a schematic sectional structure view of the biogas purification device of the present invention.
In the figure: 1. a first housing; 2. a second housing; 3. supporting legs; 4. a first elastic frame; 5. a non-slip mat; 6. an opening fixing device; 7. a support ring; 8. a soft cushion; 9. a biogas purification device; 61. a first retaining ring; 62. a hole wall clamping device; 63. a second retaining ring; 64. a second elastic sheet; 65. a third fixing ring; 66. a guide plate; 620. a spring; 621. a first support bar; 622. a first fixed block; 623. a second elastic frame; 624. a pressing plate; 625. a first spring plate; 626. fixing nails; 627. extruding the block; 628. a second fixed block; 629. an adaptation block; 901. a first support frame; 902. an air extracting fan; 903. a second support frame; 904. a fourth retaining ring; 905. placing the frame; 906. a fifth retaining ring; 907. an activated carbon block; 908. a second support bar; 909. a funnel; 910. an air duct; 911. a collection box; 912. an air outlet pipe; 913. and an air outlet.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiment was chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.
As shown in fig. 1 to 8, the present invention provides a technical solution: a protection device with a rigid structure for highway engineering comprises a first shell 1, wherein a second shell 2 is fixedly connected to the upper surface of the first shell 1, a methane purification device 9 is fixedly connected to the inner cavity of the second shell 2, supporting legs 3 are fixedly connected to the outer surface of the first shell 1, first elastic frames 4 are fixedly connected to the lower surfaces of the supporting legs 3, anti-skidding pads 5 are fixedly connected to one ends, away from the supporting legs 3, of the first elastic frames 4, an opening fixing device 6 is fixedly connected to the lower surface of the first shell 1, a supporting ring 7 is fixedly connected to the outer surface of the first shell 1, cushions 8 are fixedly connected to the lower surfaces of the supporting ring 7, and the first elastic frames 4, the anti-skidding pads 5, the supporting ring 7 and the cushions 8 are arranged, so that the protection device can be placed at a well cover opening, can have a supporting and fixing effect on the protection device, and can prevent the device from deviation caused by vehicle impact, when the device is placed at an opening, the first elastic frame 4 can deform under the influence of the gravity of the device, so that the device is kept balanced, the opening fixing device 6 comprises a first fixing ring 61, the first fixing ring 61 is fixedly connected to the lower surface of the first shell 1, the lower surface of the first fixing ring 61 is fixedly connected with an opening wall clamping device 62, the device and a manhole can be tightly fixed together by arranging the opening fixing device 6, so that the warning effect on the manhole is achieved, the impact of pedestrians and vehicles is prevented, the opening wall clamping device 62 comprises a first supporting rod 621, the top end of the first supporting rod 621 is fixedly connected with a first fixing block 622, the outer surface of the first fixing block 622 is fixedly connected with a second elastic frame 623, and one end, far away from the first fixing block 622, of the second elastic frame 623 is fixedly connected with a squeezing plate 624, the outer surface of the pressing plate 624 is fixedly connected with a first elastic sheet 625, one end of the first elastic sheet 625, which is far away from the pressing plate 624, is fixedly connected with a fixing nail 626, one side of the outer surface of the pressing plate 624, which is far away from the fixing nail 626, is fixedly connected with a pressing block 627, the bottom end of the first supporting rod 621 is fixedly connected with a second fixing block 628, one side of the outer surface of the second fixing block 628, which is far away from the first supporting rod 621, is fixedly connected with an adapting block 629, the outer surface of the adapting block 629 is fixedly connected with a spring 620, one end of the spring 620, which is far away from the adapting block 629, is fixedly connected with the outer surface of the pressing block 627, the device can be tightly fixed at the hole wall of the manhole by arranging a hole wall clamping device 62, when in use, an operator places the device at the hole wall of the manhole, under the action of the second elastic frame 623, the spring 620 and the first elastic sheet 625, the pressing plate 624 drives the fixing nail 626 to press against the wall of the hole, so that the fixing nail 626 tightly presses against the wall of the hole, the effect of the fixing device is achieved, the bottom end of the hole wall clamping device 62 is fixedly connected with the second fixing ring 63, the lower surface of the second fixing ring 63 is fixedly connected with the second spring sheet 64, the bottom end of the second spring sheet 64 is fixedly connected with the third fixing ring 65, the inner wall of the third fixing ring 65 is fixedly connected with the guide plate 66, the arrangement of the guide plate 66 and the second spring sheet 64 can enable the device to be placed at the wall of the pit more easily, the biogas purification device 9 comprises a first support frame 901, the first support frame 901 is fixedly connected at the inner wall of the second housing 2, one end of the first support frame 901, which is far away from the second housing 902, is fixedly connected with an air suction fan 902, through the arrangement of the air suction fan 902, the gas in the pit can be discharged outside the pit, when in use, the operator turns on the suction fan 902 to turn on the switch of the suction fan 902, and the suction fan 902 starts to operate, so that the air in the pit is exhausted, thereby ensuring the maintenance safety of maintenance personnel, the methane purification device 9 comprises a second support frame 903, the second supporting frame 903 is fixedly connected to the inner wall of the first casing 1, one end of the second supporting frame 903 far away from the first casing 1 is fixedly connected with a fourth fixing ring 904, a placing frame 905 is fixedly connected to the bottom surface of the inner cavity of the fourth fixing ring 904, a fifth fixing ring 906 is fixedly connected to the inner cavity of the placing frame 905, an activated carbon block 907 is fixedly connected to the upper surface of the fifth fixing ring 906, by arranging the placing frame 905 and the activated carbon blocks 907, the biogas in the pit can be purified, under the action of the suction fan 902, air in the pit is sucked out and contacts with the activated carbon block 907, thereby achieving the air purification effect, the lower surface of the fourth fixing ring 904 is fixedly connected with a second support bar 908, the bottom end of the second support bar 908 is fixedly connected with a funnel 909, the axis of the upper surface of the funnel 909 is fixedly connected with an air duct 910, the airway tube 910 extends through the funnel 909, the airway tube 910 extends through the placement frame 905, the top end of the air duct 910 is fixedly connected with a collection tank 911, the upper surface of the collection tank 911 is fixedly connected with an air outlet pipe 912, the air outlet pipe 912 penetrates through the collecting tank 911, one end of the air outlet pipe 912, which is far away from the collecting tank 911, is fixedly connected with an air outlet 913, a funnel 909, an air guide pipe 910, the collecting tank 911 and the air outlet 913 are arranged, air can enter the funnel and then is blown to the outer surface of the activated carbon block 907 from the air outlet pipe 912 and the air outlet 913 through the air duct 910 and the collecting tank 911, so that the effect of purifying the air is achieved.
When the device is used, the first elastic frame 4, the non-slip mat 5, the support ring 7 and the soft mat 8 are arranged, so that the device can be supported and fixed when placed at a manhole cover opening, the device is prevented from shifting due to vehicle impact, when the device is placed behind the opening, the first elastic frame 4 can deform under the influence of the gravity of the device, so that the device keeps balance, the device can be tightly fixed with a manhole through the arrangement of the opening fixing device 6, so that the warning effect on the manhole is achieved, the impact of pedestrians and vehicles is prevented, the device can be tightly fixed at the opening wall of the manhole through the arrangement of the opening wall clamping device 62, when the device is used, an operator places the device at the opening wall of the manhole, under the action of the second elastic frame 623, the spring 620 and the first elastic sheet 625, the pressing plate drives the fixing nails 626 to press with the opening wall, so that the fixing nail 626 is tightly pressed with the wall of the hole to achieve the effect of fixing the device, the arrangement of the guide plate 66 and the second elastic sheet 64 can make the device more easily arranged at the wall of the pit, the gas in the pit can be exhausted out of the pit by arranging the air exhaust fan 902, when in use, an operator enables the air exhaust fan 902 to be connected with a power supply and switches on the air exhaust fan 902, the air exhaust fan 902 starts to work to exhaust the air in the pit, thereby ensuring the maintenance safety of maintenance personnel, the biogas in the pit can be purified by arranging the arranging frame 905 and the active carbon block 907, the air in the pit can be exhausted under the action of the air exhaust fan 902 and is contacted with the active carbon block 907, thereby achieving the effect of purifying the air, the arrangement of the funnels 909, 910, the collection box 911 and the air outlet 913 can make the air enter the funnel, and then the air is blown to the outer surface of the activated carbon block 907 from the air outlet pipe 912 and the air outlet 913 through the air duct 910 and the collecting tank 911, so that the effect of purifying air is achieved.
It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by one of ordinary skill in the art and related arts based on the embodiments of the present invention without any creative effort, shall fall within the protection scope of the present invention. Structures, devices, and methods of operation not specifically described or illustrated herein are generally practiced in the art without specific recitation or limitation.

Claims (8)

1. A protection device for highway engineering of rigid structure, includes first shell (1), its characterized in that: the upper surface of the first shell (1) is fixedly connected with a second shell (2), the inner cavity of the second shell (2) is fixedly connected with a methane purification device (9), the outer surface of the first shell (1) is fixedly connected with supporting legs (3), the lower surfaces of the supporting legs (3) are fixedly connected with a first elastic frame (4), and one end, far away from the supporting legs (3), of the first elastic frame (4) is fixedly connected with an anti-skid pad (5);
the lower fixed surface of first shell (1) is connected with entrance to a cave fixing device (6), the outer fixed surface of first shell (1) is connected with support ring (7), the lower fixed surface of support ring (7) is connected with cushion (8).
2. A rigid structural road engineering protector as claimed in claim 1 in which: the hole fixing device (6) comprises a first fixing ring (61), the first fixing ring (61) is fixedly connected to the lower surface of the first shell (1), and the lower surface of the first fixing ring (61) is fixedly connected with a hole wall clamping device (62).
3. A rigid structural road engineering protector as claimed in claim 2 in which: hole wall clamping device (62) include first bracing piece (621), the first fixed block (622) of top fixedly connected with of first bracing piece (621), the external fixed surface of first fixed block (622) is connected with second elastic frame (623), the one end fixedly connected with stripper plate (624) of first fixed block (622) is kept away from in second elastic frame (623), the external fixed surface of stripper plate (624) is connected with first shell fragment (625), the one end fixedly connected with staple (626) of stripper plate (624) are kept away from in first shell fragment (625).
4. A rigid structural road engineering protector as claimed in claim 3 characterised in that: one side fixedly connected with extrusion piece (627) of staple (626) are kept away from to extrusion board (624) surface, the bottom fixedly connected with second fixed block (628) of first bracing piece (621), one side fixedly connected with adaptation piece (629) of first bracing piece (621) is kept away from to second fixed block (628) surface, the outer fixed surface of adaptation piece (629) is connected with spring (620), the one end fixed connection that adaptation piece (629) was kept away from in spring (620) is at the surface of extrusion piece (627).
5. A rigid structural road engineering protector according to claim 4 characterised in that: the bottom end of the hole wall clamping device (62) is fixedly connected with a second fixing ring (63), the lower surface of the second fixing ring (63) is fixedly connected with a second elastic sheet (64), the bottom end of the second elastic sheet (64) is fixedly connected with a third fixing ring (65), and the inner wall of the third fixing ring (65) is fixedly connected with a guide plate (66).
6. A rigid structural road engineering protector as claimed in claim 1 in which: the biogas purification device (9) comprises a first support frame (901), the first support frame (901) is fixedly connected to the inner wall of the second outer shell (2), and one end, far away from the second outer shell (2), of the first support frame (901) is fixedly connected with an exhaust fan (902).
7. A rigid structural road engineering protector as claimed in claim 1 in which: the biogas purification device (9) comprises a second support frame (903), the second support frame (903) is fixedly connected to the inner wall of the first shell (1), one end of the second support frame (903) away from the first shell (1) is fixedly connected with a fourth fixing ring (904), the inner cavity bottom surface of the fourth fixing ring (904) is fixedly connected with a placing frame (905), the inner cavity of the placing frame (905) is fixedly connected with a fifth fixing ring (906), and the upper surface of the fifth fixing ring (906) is fixedly connected with an activated carbon block (907).
8. A rigid structural road engineering guard according to claim 7 characterised in that: the lower fixed surface of the fixed ring of fourth (904) is connected with second bracing piece (908), second bracing piece (908) bottom fixedly connected with funnel (909), fixedly connected with air duct (910) are located to the axle center of funnel (909) upper surface, air duct (910) run through funnel (909), air duct (910) run through place frame (905), the top fixedly connected with of air duct (910) gathers case (911), the last fixed surface of gathering case (911) is connected with outlet duct (912), outlet duct (912) run through and gather case (911), outlet duct (912) keep away from the one end fixedly connected with gas outlet (913) of gathering case (911).
CN202310044403.5A 2023-01-30 2023-01-30 Protective device for highway engineering of rigid structure Active CN115853105B (en)

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Application Number Priority Date Filing Date Title
CN202310044403.5A CN115853105B (en) 2023-01-30 2023-01-30 Protective device for highway engineering of rigid structure

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Application Number Priority Date Filing Date Title
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CN115853105B CN115853105B (en) 2023-05-12

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CN115283392A (en) * 2022-09-13 2022-11-04 江苏固茗智能科技有限公司 Energy-saving type air supplementing ventilation cabinet
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CN108824494A (en) * 2018-07-19 2018-11-16 刘中雷 A kind of civilian infrastructure is built with the temporary sealing device of inspection shaft
CN211328786U (en) * 2019-11-05 2020-08-25 无锡市华骥环保科技有限公司 Novel internal circulation peculiar smell gas purification device
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116237705A (en) * 2023-05-12 2023-06-09 深圳市嘉鑫精密智造有限公司 Anti-offset welding equipment for metal product processing
CN116966704A (en) * 2023-09-13 2023-10-31 辽宁普雷特环保科技有限公司 Water-cooling dust removal equipment for high-temperature flue gas treatment
CN116966704B (en) * 2023-09-13 2024-02-06 辽宁普雷特环保科技有限公司 Water-cooling dust removal equipment for high-temperature flue gas treatment

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Application publication date: 20230328

Assignee: Hebei Duosai Construction Engineering Co.,Ltd.

Assignor: Hebei Bosi Technology Co.,Ltd.

Contract record no.: X2023980039338

Denomination of invention: A Rigid Structure Protective Device for Highway Engineering

Granted publication date: 20230512

License type: Common License

Record date: 20230809