CN112879091B - Tunnel corrugated steel duct end reinforcing device - Google Patents
Tunnel corrugated steel duct end reinforcing device Download PDFInfo
- Publication number
- CN112879091B CN112879091B CN202110201216.4A CN202110201216A CN112879091B CN 112879091 B CN112879091 B CN 112879091B CN 202110201216 A CN202110201216 A CN 202110201216A CN 112879091 B CN112879091 B CN 112879091B
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- pipe
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- tube
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 46
- 239000010959 steel Substances 0.000 title claims abstract description 46
- 230000003014 reinforcing effect Effects 0.000 title claims abstract description 13
- 239000004033 plastic Substances 0.000 claims description 14
- 238000010276 construction Methods 0.000 claims description 4
- 230000009471 action Effects 0.000 abstract description 6
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 238000006073 displacement reaction Methods 0.000 abstract description 3
- 230000008878 coupling Effects 0.000 description 6
- 238000010168 coupling process Methods 0.000 description 6
- 238000005859 coupling reaction Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F16/00—Drainage
- E21F16/02—Drainage of tunnels
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F5/00—Draining the sub-base, i.e. subgrade or ground-work, e.g. embankment of roads or of the ballastway of railways or draining-off road surface or ballastway drainage by trenches, culverts, or conduits or other specially adapted means
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- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Supports For Pipes And Cables (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
Abstract
The invention discloses a tunnel corrugated steel culvert end reinforcing device which comprises a culvert, wherein the inner wall of the culvert is tightly connected with the outer side of a fixing structure, the fixing structure comprises a connecting pipe, the pipe wall of the connecting pipe is fixedly connected with a plurality of expansion rings, the outer sides of the expansion rings are tightly contacted with the inner wall of the culvert, the top of the connecting pipe is fixedly connected with a beam-receiving pipe, the tail end of the beam-receiving pipe is fixedly connected with a connecting block, the connecting block is connected with the middle part of an inner supporting pipe through bolts, and the two ends of the inner supporting pipe are connected with the connecting pipe and the inner wall of the beam-receiving pipe in an inserting mode. Compared with the prior art, the invention has the beneficial effects that: under the cooperation of the fixing structure, the inner supporting tube and the tightening structure, the invention can realize the enhancement of stability from the inside at the connection position of the duct port; under the action of the external fixing structure, the invention can realize the enhancement of connection stability outside the duct port, avoid displacement and deformation of the duct caused by the influence of the foundation, and ensure the service life of the duct.
Description
Technical Field
The invention relates to the technical field of duct reinforcement equipment, in particular to a tunnel corrugated steel duct end reinforcement device.
Background
The plastic corrugated pipe product is attractive, light and durable, is widely applied to various fields, is relatively mature in equipment, forming technology, process and raw materials through development for about thirty years, and gradually expands the material of the plastic corrugated pipe from PVC to PE, PP and other raw materials, and gradually develops the pipe diameter of the plastic corrugated pipe towards the large-caliber direction. Because the strength of the plastic is limited, the strength of the prepared corrugated pipe is limited, and a steel corrugated duct appears.
The steel corrugated culvert is a novel building material, and has the advantages of good ductility, strong deformation resistance, quick and convenient installation, construction period saving, low cost, environmental protection and the like. At present, steel corrugated culvert materials are widely used in traffic engineering and municipal engineering to manufacture engineering structures such as culverts, tunnels, underground passages, underground pipelines and the like. However, in the use process, the corrugated steel structure duct is found to be slightly deformed along with the influence of factors such as uneven settlement of the foundation at the port connection position, and the structural strength is still required to be enhanced at the end part to reduce the deformation amount although the safety and the stability of the structure are not influenced.
For this purpose we propose a tunnel corrugated steel duct end reinforcing device to solve the above problems.
Disclosure of Invention
The invention aims to provide a tunnel corrugated steel duct end reinforcing device which is used for solving the problems in the background technology.
In order to achieve the above purpose, the present invention provides the following technical solutions: the utility model provides a tunnel corrugated steel duct tip reinforcing apparatus, includes the duct, duct inner wall close connection fixed knot constructs the outside, fixed knot constructs including the connecting pipe, connecting pipe wall rigid coupling a plurality of expansion rings, expansion ring outside close contact duct inner wall, connecting pipe top rigid coupling beam-receiving pipe, beam-receiving pipe end rigid coupling connecting block, connecting block bolted connection inner stay tube middle part, inner stay tube both ends grafting connecting pipe and beam-receiving pipe inner wall; the pipe wall of the beam-gathering pipe is movably connected with a beam-gathering structure, the beam-gathering structure comprises a rubber-plastic ring, the inner ring of the rubber-plastic ring is slidably connected with the beam-gathering pipe, the outer ring of the rubber-plastic ring is fixedly connected with the beam-gathering ring, the left side of the beam-gathering ring is fixedly connected with a beam-gathering piece, two ends of the beam-gathering piece are symmetrically fixedly connected with a beam-gathering cylinder, the left side of the beam-gathering cylinder is fixedly connected with a fixed nut, the right side of the beam-gathering cylinder is movably connected with a movable nut, the inner side of the beam-gathering nut is fixedly connected with the right side of the beam-gathering ring, and a tightening bolt is in threaded connection between the movable nut and the fixed nut;
the outer sides of the two ends of the culvert are symmetrically and tightly connected with the inner sides of the outer fixing structures, the outer fixing structures comprise symmetrically installed steel rings, the inner sides of the steel rings are sleeved with the culvert, the outer sides of the steel rings are symmetrically fixedly connected with steel belts, the outer side sleeves of the steel belts are symmetrically and tightly connected with the receiving hoops, and the inner ends of the steel belts are symmetrically and fixedly connected with connecting lugs.
Preferably, the inner diameter of the connecting pipe is reduced from top to bottom, and the cross section of the connecting pipe is trapezoidal.
Preferably, the outer side of the expansion ring is tightly contacted with the trough of the inner wall of the duct, and the inner side of the steel ring is sleeved with the trough of the outer side of the duct.
Preferably, the beam converging tube comprises a plurality of beam converging grooves, the wall of the beam converging tube is provided with a plurality of beam converging grooves, and the beam converging grooves divide the beam converging tube into a plurality of beam converging strips.
Preferably, the inner supporting tube comprises a communicating tube, the wall of the communicating tube is provided with a plurality of friction lines, and the wall of the communicating tube is tightly connected with the inner wall of the converging tube; the two ends of the communicating pipe are fixedly connected and communicated with a round platform pipe, and the inclined surface of the round platform pipe is tightly connected with the inner wall of the connecting pipe; connecting ring is fixedly connected at the middle part of the pipe wall of the communicating pipe, a plurality of alignment holes are formed in the middle part of the connecting ring wall, the alignment Kong Kongqiang is in threaded connection with one end of a fastening bolt, the other end of the fastening bolt is in threaded connection with a positioning hole, and the positioning hole is formed in the middle part of the connecting block.
Preferably, one end of the tightening bolt is fixedly connected with a force-applying rod, and the other end of the tightening bolt is fixedly connected with a limiting head.
Preferably, connecting holes are formed in the middle of the connecting lugs symmetrically, bolts are connected between the connecting holes in a threaded mode, and nuts are connected to the tail ends of the bolts in a threaded mode; the tightening strap is of the same construction as the constriction.
Compared with the prior art, the invention has the beneficial effects that: under the cooperation of the fixing structure, the inner supporting tube and the tightening structure, the invention can realize the enhancement of stability from the inside at the connection position of the duct port; under the action of the external fixing structure, the invention can realize the enhancement of connection stability outside the duct port, avoid displacement and deformation of the duct caused by the influence of the foundation, and ensure the service life of the duct. When the connecting pipe and the circular truncated cone pipe are embedded into the inner walls of the connecting pipe and the converging pipe, the connecting pipe and the converging pipe can play a role in expanding and supporting, then the connecting block and the connecting ring are connected through the fastening bolt, and simultaneously the inner supporting pipe can be fixed under the matching effect of the converging structure; the expansion ring of the fixed structure can be clamped and embedded in the trough inside the duct, the steel ring of the external fixed structure can be clamped and embedded in the trough outside the duct, and when the tightening hoop is tightened, the positions of the duct, the fixed structure and the external fixed structure can be fixed under the mutual occlusion of the expansion ring and the steel ring.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic view of a partial structure of the present invention;
FIG. 3 is a schematic view of the inner tube structure of the present invention;
FIG. 4 is a schematic view of a fixing structure according to the present invention;
FIG. 5 is a schematic view of a beam converging structure according to the present invention;
in the figure: 1 duct, 2 fixed knot constructs: 20 connecting pipes, 21 expanding rings and 22 converging pipes: 220 beam-receiving slots, 221 beam-receiving strips; 23 connecting blocks and 230 positioning holes; 3, an inner supporting tube, namely a 30 communicating tube, 31 friction lines, a 32 round platform tube, a 33 connecting ring, 34 alignment holes and 35 fastening bolts; 4, a beam-converging structure: 40 rubber and plastic rings, 41 binding rings, 42 binding sheets, 43 binding cylinders, 44 fixed nuts, 45 movable nuts, 46 tightening bolts, 47 stressing rods and 48 limiting heads; 5 external fixation structure: 50 steel rings, 51 steel belts, 52 tightening hoops, 53 connecting lugs, 54 connecting holes, 55 bolts and 56 nuts.
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. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1-5, the present invention provides a technical solution: the utility model provides a tunnel corrugated steel duct tip reinforcing apparatus, including duct 1, duct 1 inner wall closely connected fixed knot constructs 2 outside, and fixed knot constructs 2 and includes connecting pipe 20, and connecting pipe 20 pipe wall rigid coupling expansion ring 21, expansion ring 21 outside in close contact with duct 1 inner wall, connecting pipe 20 top rigid coupling beam-receiving pipe 22, beam-receiving pipe 22 end rigid coupling connecting block 23, connecting block 23 bolted connection inner stay tube 3 middle part, inner stay tube 3 both ends grafting connecting pipe 20 and beam-receiving pipe 22 inner wall; the pipe wall of the beam-gathering pipe 22 is movably connected with the beam-gathering structure 4, the beam-gathering structure 4 comprises a rubber-plastic ring 40, the inner ring of the rubber-plastic ring 40 is slidably connected with the beam-gathering pipe 22, the outer ring of the rubber-plastic ring 40 is fixedly connected with a beam-gathering ring 41, the left side of the beam-gathering ring 41 is fixedly connected with a beam-gathering piece 42, two ends of the beam-gathering piece 42 are symmetrically fixedly connected with beam-gathering pipes 43, the inside of the left beam-gathering pipe 43 is fixedly connected with a fixed nut 44, the inside of the right beam-gathering pipe 43 is movably connected with a movable nut 45, the inside of the beam-gathering nut 45 is fixedly connected with the right side of the beam-gathering ring 41, and a tightening bolt 46 is in threaded connection between the movable nut 45 and the fixed nut 44; when the connecting pipe 20 and the converging tube 22 are embedded in the communicating pipe 30 and the circular truncated cone tube 32, the connecting pipe 20 and the converging tube 22 can have an expanding supporting function, then the connecting block 24 and the connecting ring 33 are connected through the fastening bolt 35, and the inner supporting tube 3 can be fixed under the matching action of the converging structure 4.
The outer sides of the two ends of the duct 1 are symmetrically and tightly connected with the inner sides of the outer fixing structures 5, the outer fixing structures 5 comprise symmetrically installed steel rings 50, the inner sides of the steel rings 50 are sleeved with the duct 1, the outer sides of the symmetrical steel rings 50 are fixedly connected with steel belts 51, the outer sides of the symmetrical steel belts 51 are sleeved with receiving tightening rings 52, and the inner ends of the symmetrical steel belts 51 are symmetrically fixedly connected with connecting lugs 53.
The inner diameter of the connection pipe 20 is reduced from top to bottom, and the section shape thereof is trapezoidal. Which facilitates the embedding and tightening of the frustoconical tubes 32 in the inner support tube 22.
The outer side of the expansion ring 21 is tightly contacted with the trough of the inner wall of the duct 1, and the inner side of the steel ring 50 is sleeved with the trough of the outer side of the duct 1. When the tightening band 52 is tightened, the positions of the stent 1, the fixation structure 2 and the external fixation structure 5 may be fixed under the mutual engagement of the stent ring 21 and the steel ring 50.
The beam converging tube 22 comprises a plurality of beam converging grooves 220, the beam converging grooves 220 are formed in the tube wall of the beam converging tube 22, and the beam converging grooves 220 divide the beam converging tube into a plurality of beam converging strips 221. Is beneficial to adapting to the inner supporting pipes 3 with different calibers.
The inner supporting tube 3 comprises a communicating tube 30, the communicating tube 30 is provided with a plurality of friction lines 31 on the tube wall of the communicating tube 30, and the tube wall of the communicating tube 30 is tightly connected with the inner wall of the converging tube 22; the two ends of the communicating pipe 30 are fixedly connected and communicated with the round platform pipe 32, and the inclined surface of the round platform pipe 32 is tightly connected with the inner wall of the connecting pipe 20; the middle part of the pipe wall of the communicating pipe 30 is fixedly connected with a connecting ring 33, a plurality of alignment holes 34 are formed in the middle part of the ring wall of the connecting ring 33, the hole cavities of the alignment holes 34 are connected with one end of a fastening bolt 35 in a threaded manner, the other end of the fastening bolt 35 is connected with a positioning hole 230 in a threaded manner, and the positioning hole 230 is formed in the middle part of the connecting block 23.
One end of the tightening bolt 46 is fixedly connected with a force-applying rod 47, and the other end of the tightening bolt 46 is fixedly connected with a limiting head 48.
The middle part of the symmetrical connecting lug 53 is provided with connecting holes 54, bolts 55 are connected between the connecting holes 54 in a threaded manner, and nuts 56 are connected at the tail ends of the bolts 55 in a threaded manner; the tightening strap 52 is of the same construction as the constriction 4. When the connection lugs 53 are connected through the bolts 55, the external fixation structure 5 can be stably connected, and meanwhile the stability of the duct 1 is enhanced.
Working principle: under the cooperation of the fixed structure 2, the inner supporting tube 3 and the tightening structure 4, the invention can realize the enhancement of stability from the inside at the connection position of the port of the duct 1; under the action of the external fixing structure 5, the invention can realize the enhancement of the connection stability of the outside of the port of the duct 1, avoid the displacement and deformation of the duct 1 caused by the influence of the foundation, and ensure the service life of the duct 1. When the connecting pipe 20 and the inner wall of the converging tube 22 are embedded in the communicating pipe 30 and the circular truncated cone tube 32, the connecting pipe 20 and the inner wall of the converging tube 22 can play a role in expanding and supporting, then the connecting block 24 and the connecting ring 33 are connected through the fastening bolt 35, and simultaneously the inner supporting tube 3 can be fixed under the matching action of the converging structure 4; when the force-applying rod 47 is rotated, the tightening bolts 46 are synchronously rotated, the movable nuts 45 are close to the fixed nuts 44 under the action of threads, and meanwhile, the right side of the tightening ring 41 is inwards curled to the left side, so that the inner diameter of the tightening ring 41 is reduced, and further tightening and fixing are realized.
The expansion ring 21 of the fixed structure 2 can be clamped and embedded in the trough inside the duct 1, the steel ring 50 of the external fixation structure 5 can be clamped and embedded in the trough outside the duct 1, and when the tightening hoop 52 is tightened, the positions of the duct 1, the fixed structure 2 and the external fixation structure 5 can be fixed under the mutual occlusion of the expansion ring 21 and the steel ring 50.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The utility model provides a tunnel ripple steel duct tip reinforcing apparatus, includes duct (1), its characterized in that: the inner wall of the culvert (1) is tightly connected with the outer side of the fixed structure (2), the fixed structure (2) comprises a connecting pipe (20), the pipe wall of the connecting pipe (20) is fixedly connected with a plurality of expansion rings (21), the outer sides of the expansion rings (21) are tightly contacted with the inner wall of the culvert (1), the top of the connecting pipe (20) is fixedly connected with a beam-receiving pipe (22), the tail end of the beam-receiving pipe (22) is fixedly connected with a connecting block (23), the connecting block (23) is connected with the middle part of the inner supporting pipe (3) through bolts, and the two ends of the inner supporting pipe (3) are connected with the inner walls of the connecting pipe (20) and the beam-receiving pipe (22) in an inserting mode; the device is characterized in that the pipe wall of the beam converging pipe (22) is movably connected with the beam converging structure (4), the beam converging structure (4) comprises a rubber plastic ring (40), an inner ring of the rubber plastic ring (40) is slidably connected with the beam converging pipe (22), an outer ring of the rubber plastic ring (40) is fixedly connected with a beam converging ring (41), a beam converging piece (42) is fixedly connected to the left side of the beam converging ring (41), two ends of the beam converging piece (42) are symmetrically fixedly connected with a beam converging barrel (43), a fixed nut (44) is fixedly connected to the inside of the beam converging barrel (43) on the left side, a movable nut (45) is movably connected to the right side of the beam converging ring (41) on the inside of the movable nut (45), and a tightening bolt (46) is connected between the movable nut (45) and the fixed nut (44) in a threaded manner;
the two ends of the culvert (1) are symmetrically and tightly connected with the inner side of the external fixing structure (5), the external fixing structure (5) comprises symmetrically installed steel rings (50), the culvert (1) is sleeved on the inner side of each steel ring (50), steel belts (51) are fixedly connected to the outer sides of the steel rings (50), hoops (52) are sleeved on the outer sides of the steel belts (51), and connecting lugs (53) are symmetrically and fixedly connected to the inner ends of the steel belts (51);
the inner supporting tube (3) comprises a communicating tube (30), the communicating tube (30) is provided with a plurality of friction lines (31) on the tube wall of the communicating tube (30), and the tube wall of the communicating tube (30) is tightly connected with the inner wall of the converging tube (22); the two ends of the communicating pipe (30) are fixedly connected and communicated with the round platform pipe (32), and the inclined surface of the round platform pipe (32) is tightly connected with the inner wall of the connecting pipe (20); connecting ring (33) is fixedly connected in the middle of the pipe wall of communicating pipe (30), a plurality of alignment holes (34) are formed in the middle of the ring wall of connecting ring (33), the alignment holes (34) are connected with one end of a fastening bolt (35) through threads, the other end of the fastening bolt (35) is connected with a positioning hole (230) through threads, and the positioning hole (230) is formed in the middle of a connecting block (23).
2. The tunnel corrugated steel culvert end reinforcing apparatus of claim 1, wherein: the inner diameter of the connecting pipe (20) is reduced from top to bottom, and the cross section of the connecting pipe is trapezoidal.
3. The tunnel corrugated steel culvert end reinforcing apparatus of claim 1, wherein: the outer side of the expansion ring (21) is tightly contacted with the trough of the inner wall of the duct (1), and the inner side of the steel ring (50) is sleeved with the trough of the outer side of the duct (1).
4. The tunnel corrugated steel culvert end reinforcing apparatus of claim 1, wherein: the beam converging tube (22) comprises a plurality of beam converging grooves (220), the beam converging tube (22) is provided with a plurality of beam converging grooves (220) on the tube wall, and the beam converging grooves (220) divide the beam converging tube into a plurality of beam converging strips (221).
5. The tunnel corrugated steel culvert end reinforcing apparatus of claim 1, wherein: one end of the tightening bolt (46) is fixedly connected with a force-applying rod (47), and the other end of the tightening bolt (46) is fixedly connected with a limiting head (48).
6. The tunnel corrugated steel culvert end reinforcing apparatus of claim 1, wherein: a connecting hole (54) is formed in the middle of the connecting lug (53), bolts (55) are connected between the connecting holes (54) in a threaded mode, and nuts (56) are connected at the tail ends of the bolts (55) in a threaded mode; the tightening strap (52) is of the same construction as the constriction (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110201216.4A CN112879091B (en) | 2021-02-23 | 2021-02-23 | Tunnel corrugated steel duct end reinforcing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110201216.4A CN112879091B (en) | 2021-02-23 | 2021-02-23 | Tunnel corrugated steel duct end reinforcing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112879091A CN112879091A (en) | 2021-06-01 |
| CN112879091B true CN112879091B (en) | 2023-08-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110201216.4A Active CN112879091B (en) | 2021-02-23 | 2021-02-23 | Tunnel corrugated steel duct end reinforcing device |
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| CN (1) | CN112879091B (en) |
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| CN210462040U (en) * | 2019-09-03 | 2020-05-05 | 江苏百澄特种钢管制造有限公司 | Seamless steel pipe |
| CN211371559U (en) * | 2019-09-17 | 2020-08-28 | 济南金利源环保科技股份有限公司 | Steel band reinforcing HDPE helical bellows |
| CN212427805U (en) * | 2020-05-07 | 2021-01-29 | 四川零公里工程构件有限责任公司 | Pipe joint connector of plastic corrugated pipe with reinforcing rib tightening hoop |
-
2021
- 2021-02-23 CN CN202110201216.4A patent/CN112879091B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204000649U (en) * | 2014-05-30 | 2014-12-10 | 中交第二公路勘察设计研究院有限公司 | A kind of concave pipe cuff structure connecting for corrugated steel culvert |
| CN206723633U (en) * | 2017-05-04 | 2017-12-08 | 中美汇能(厦门)电力科技有限公司 | A kind of planomural bellows and its attachment structure |
| CN207112168U (en) * | 2017-08-30 | 2018-03-16 | 天俱时工程科技集团有限公司 | It is a kind of to be used for corrugated flexible hose and the quick union of fastener for connection |
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| CN110220049A (en) * | 2019-07-11 | 2019-09-10 | 芜湖泰和管业股份有限公司 | Composite metal corrugated pipe with hard seal nipple |
| CN210462040U (en) * | 2019-09-03 | 2020-05-05 | 江苏百澄特种钢管制造有限公司 | Seamless steel pipe |
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| Publication number | Publication date |
|---|---|
| CN112879091A (en) | 2021-06-01 |
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