CN113481842A - Assembly environmental protection is fallen and is fallen broach type telescoping device - Google Patents
Assembly environmental protection is fallen and is fallen broach type telescoping device Download PDFInfo
- Publication number
- CN113481842A CN113481842A CN202110792764.9A CN202110792764A CN113481842A CN 113481842 A CN113481842 A CN 113481842A CN 202110792764 A CN202110792764 A CN 202110792764A CN 113481842 A CN113481842 A CN 113481842A
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- plate
- toothed plate
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- comb
- positioning plate
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- 230000007613 environmental effect Effects 0.000 title claims description 6
- 244000126211 Hericium coralloides Species 0.000 claims abstract description 24
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 23
- 239000010935 stainless steel Substances 0.000 claims abstract description 23
- 229910000831 Steel Inorganic materials 0.000 claims description 14
- 238000006073 displacement reaction Methods 0.000 claims description 14
- 239000010959 steel Substances 0.000 claims description 14
- 229910000746 Structural steel Inorganic materials 0.000 claims description 7
- 230000002787 reinforcement Effects 0.000 claims description 2
- 238000003466 welding Methods 0.000 claims description 2
- 238000009434 installation Methods 0.000 abstract description 10
- 238000010276 construction Methods 0.000 description 5
- 230000008859 change Effects 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 238000004873 anchoring Methods 0.000 description 2
- 238000013016 damping Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 244000082204 Phyllostachys viridis Species 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000002337 anti-port Effects 0.000 description 1
- 239000010426 asphalt Substances 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 235000000396 iron Nutrition 0.000 description 1
- 230000009191 jumping Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
Classifications
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/06—Arrangement, construction or bridging of expansion joints
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/06—Arrangement, construction or bridging of expansion joints
- E01D19/065—Joints having sliding plates
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/08—Damp-proof or other insulating layers; Drainage arrangements or devices ; Bridge deck surfacings
- E01D19/083—Waterproofing of bridge decks; Other insulations for bridges, e.g. thermal ; Bridge deck surfacings
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/20—Concrete, stone or stone-like material
- E01D2101/24—Concrete
- E01D2101/26—Concrete reinforced
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/30—Metal
Abstract
The invention provides an assembled environment-friendly noise-reducing comb tooth type telescopic device which comprises a main toothed plate and an auxiliary toothed plate which are matched, wherein the main toothed plate is a movable toothed plate and is provided with a first row of comb teeth; the auxiliary toothed plate is a fixed toothed plate and is provided with a second row of comb teeth; the first row of comb teeth and the second row of comb teeth are arranged in a staggered mode, and stainless steel sliding plates are arranged below the staggered positions of the first row of comb teeth and the second row of comb teeth. A first positioning plate, a shifting box assembly and a pre-buried sleeve are arranged below the main toothed plate; a stainless steel sliding plate, an embedded sleeve and a second positioning plate are arranged below the auxiliary toothed plate; and a waterproof rubber component is arranged at the gap of the beam end. The invention is of an assembly type, and the embedded part can be assembled before leaving the factory, thereby being convenient for installation and saving installation time. When the main toothed plate and the auxiliary toothed plate are damaged, the main toothed plate and the auxiliary toothed plate are convenient to replace, concrete does not need to be poured again, traffic is only cut off for 2-3 hours, and the influence on the traffic is reduced to the minimum.
Description
Technical Field
The invention relates to a telescopic device, in particular to an assembled environment-friendly noise-reducing comb-tooth type telescopic device.
Background
The expansion device for highway bridge is a general name of various devices arranged at the expansion joint in order to ensure that vehicles stably pass through the bridge floor and meet the requirement of deformation of the upper structure of the bridge. The bridge expansion device has the main functions of meeting the requirements of longitudinal, horizontal and vertical displacement of the bridge and displacement of earthquake increment caused by conditions such as temperature difference, wind power, vehicle-mounted conditions and the like, ensuring the safety of a bridge structure, further providing a flat and comfortable bridge deck environment and enabling the vehicle to quickly and stably pass through the beam end expansion device area. With the rapid development of economic construction in China, high-grade highways represented by expressways are emerging like bamboo shoots in spring after raining, the traffic volume of highways is increased rapidly, the speed of vehicles running on highways and the axle weight of the vehicles are increased, and the highway bridge expansion device directly bears repeated impact of wheel load in a bridge structure, is exposed in the atmosphere for a long time, is relatively severe in use environment, and is not paid attention to construction, is not maintained in place and the like, so that the bridge expansion device becomes a part which is most easily damaged and is difficult to repair in the bridge structure. In the traditional repair work, the traffic needs to be blocked firstly, and the groove needs to be opened for the second time, so that a large amount of construction waste is generated; the embedded steel bars are corrected, the new expansion device is installed again, concrete is poured, maintenance is needed, the construction period is long, high-speed normal passing is influenced, and a large amount of manpower, material resources and financial resources are wasted.
Disclosure of Invention
The invention provides an assembled environment-friendly noise-reduction comb-tooth type expansion device, which solves the problem of repairing a highway bridge expansion device and adopts the following technical scheme:
the utility model provides an assembly environmental protection is fallen comb tooth type telescoping device of making an uproar, is including installing main pinion rack and the vice pinion rack at bridge main part fracture department both ends, main pinion rack is provided with the first comb tooth that is listed as, vice pinion rack correspondence is provided with and is listed as the comb tooth with the first second that is listed as comb tooth staggered arrangement, and the below of main pinion rack is provided with first locating component, be equipped with the stainless steel slide below the vice pinion rack, the below of stainless steel slide is provided with second locating component.
The first positioning assembly comprises a first positioning plate, a shifting box assembly and a first embedded sleeve, the shifting box assembly and the first embedded sleeve are located between the main toothed plate and the first positioning plate, and the upper end and the lower end of the shifting box assembly and the upper end of the first embedded sleeve are fixedly connected with the main toothed plate and the first positioning plate through anchor bolts respectively.
The second positioning assembly comprises a stainless steel sliding plate, a second embedded sleeve and a second positioning plate are arranged below the stainless steel sliding plate, the second embedded sleeve is located between the second positioning plate and the stainless steel sliding plate, and the upper end and the lower end of the second embedded sleeve are fixedly connected with the auxiliary toothed plate and the second positioning plate through anchor bolts respectively. And the anchor bolt for connecting the auxiliary toothed plate and the second embedded sleeve penetrates through the stainless steel sliding plate.
The two ends of the waterproof rubber component are fixed by angle irons which are fixed on the first positioning plate or the second positioning plate through fixing bolts.
The angle iron on one side of the auxiliary toothed plate is positioned below the stainless steel sliding plate, and the angle iron on one side of the main toothed plate is positioned below the main toothed plate.
The first positioning plate below the main toothed plate and the second positioning plate below the auxiliary toothed plate are identical in structure and height.
First locating plate carries out welded connection with the embedded steel bar in the reservation tank, and first embedded sleeve and displacement box subassembly are through crossing steel bar connection, perhaps consolidate through welded steel bar cage.
The second locating plate carries out welded connection with the embedded steel bar in the preformed groove, and the embedded sleeve of second is through crossing the steel bar connection, perhaps consolidates through welding reinforcement cage.
The comb tooth type telescoping device of making an uproar falls in assembly environmental protection is provided with the first locating plate of connecting shift box subassembly and pre-buried telescopic, connects pre-buried telescopic second locating plate, through demolising the anchor bolt on main pinion rack and the vice pinion rack, realizes quick installation, change, the maintenance of main pinion rack and vice pinion rack.
The device is assembled, the installation and the replacement are quick, the labor and the time are saved, the embedded part can be assembled before delivery, the installation is convenient, and the installation time is saved. When the telescopic device is damaged, the main toothed plate and the auxiliary toothed plate are convenient to replace, concrete does not need to be poured again, traffic is only required to be cut off for 2-3 hours, and the influence on the traffic is reduced to the minimum. When the shifting box component is damaged, the shifting component can be replaced independently, and the use of the whole telescopic device is not influenced.
Drawings
Fig. 1 is a schematic structural diagram of the assembled environment-friendly noise-reducing comb-tooth type expansion device.
FIG. 2 is a schematic structural view of the waterproof rubber member;
fig. 3 is a schematic top view of the assembled environment-friendly noise-reducing comb-tooth type expansion device.
Detailed Description
As shown in fig. 1 to 3, assemble environmental protection and fall comb tooth type telescoping device of making an uproar, include main pinion rack 1 and the vice pinion rack 2 that carry out the matching through the broach, one side that main pinion rack 1 is close to vice pinion rack 2 is equipped with first row of broach 7, and one side that vice pinion rack 2 is close to main pinion rack 1 is equipped with second row of broach 8, and first row of broach 7 is arranged with second row of broach 8 staggered arrangement, is equipped with stainless steel slide 3 below first row of broach 7 and the second row of broach 8 staggered department. The main toothed plate 1 is a movable toothed plate, the auxiliary toothed plate 2 is a fixed toothed plate, the telescopic movement of the product is completed by the main toothed plate 1, and no longitudinal transition gap exists. When the main bridge body where the main toothed plate 1 is located and the main bridge body where the auxiliary toothed plate 2 is located are close to each other, the main toothed plate 1 is close to the auxiliary toothed plate 2 and is close to the upper side of the stainless steel sliding plate 3.
Further, when the bridge structure is elongated or shortened due to temperature change and beam end gap caused by concrete shrinkage and creep influence, the main toothed plate 1 changes along with the change of the beam end gap; the temperature rises, and the beam-ends clearance diminishes, and main pinion rack 1 moves to fixed auxiliary pinion rack 2, and the clearance that comb tooth 7 was listed as to the first and 8 comb teeth of second row diminishes. The temperature reduces, and the increase of beam-ends clearance, 1 antiport of main pinion rack, the clearance grow of broach 7 and the second row of broach 8 is listed as to first row, satisfies the flexible needs of bridge.
Be equipped with first locating plate 11, displacement box subassembly 12 and first pre-buried sleeve 13 below main pinion rack 1, and displacement box subassembly 12 and first pre-buried sleeve 13 are located between main pinion rack 1 and first locating plate 11. The first positioning plate 11 is machined in advance, so that an accurate positioning function is realized; the damping rubber body is arranged in the displacement box component 12, so that the displacement box component is convenient to replace, realizes the multidirectional displacement function of the comb-tooth-shaped expansion joint, and plays a role in damping when being pressed; the first embedded sleeve 13 is used for connecting the first positioning plate 11 and the main toothed plate 1 and is used for fixing.
The first locating plate 11 is connected with the shifting box assembly 12 and the first embedded sleeve 13 through bolts 14, and the main toothed plate 1 is connected with the shifting box assembly 12 and the first embedded sleeve 13 through bolts 14. The main toothed plate 1 is connected with the first positioning plate 11 through a first embedded sleeve 13, and two ends of the main toothed plate are connected through bolts 14.
Be equipped with stainless steel slide 3 below the auxiliary tooth plate 2, the below of stainless steel slide 3 is provided with pre-buried sleeve 21 of second and second locating plate 22, and pre-buried sleeve 21 of second is located between second locating plate 22 and the stainless steel slide 3. The second positioning plate 22 is connected with the second embedded sleeve 21 through bolts 14, the auxiliary toothed plate 2 is connected with the second embedded sleeve 21 through bolts 14, and the bolts 14 connecting the auxiliary toothed plate 2 and the second embedded sleeve 21 penetrate through the stainless steel sliding plate 3. The auxiliary toothed plate 2 is connected with a second positioning plate 22 through a second embedded sleeve 21, and two ends of the auxiliary toothed plate are connected through bolts 14.
This telescoping device is for strideing the seam formula, and main pinion rack 1 stridees across the beam-ends clearance, and the beam-ends clearance department of bridge main part 100 below main pinion rack 1 installs waterproof rubber component 4, and waterproof rubber component 4's both ends adopt angle bar 5 fixed, angle bar 5 passes through fixing bolt 6 to be fixed on first locating plate 11 or second locating plate 22. Further, the angle iron 5 close to the auxiliary toothed plate 2 is positioned below the stainless steel sliding plate 3 and is lower than one side close to the main toothed plate 1 in height.
The first positioning plate 11, the shifting box assembly 12 and the first embedded sleeve 13 are regarded as embedded parts below the main toothed plate 1, the second positioning plate 22 and the second embedded sleeve 21 are regarded as embedded parts below the auxiliary toothed plate 2, and the first positioning plate 11 and the second positioning plate 22 are identical in structure and height; the first embedded sleeve 13 and the second embedded sleeve 21 have the same structure.
The comb-tooth-shaped telescoping device with the noise reduction function in the environment-friendly assembly can be used for connecting the first embedded sleeve 13 and the position changing box component 12 on the first positioning plate 11 through the anchor bolt 14 in advance when being manufactured in a factory, and the second embedded sleeve 21 is connected on the second positioning plate 22 through the anchor bolt 14, so that accurate positioning is realized, and the installation time is saved. After the first positioning plate 11 is machined in a factory, the first embedded sleeve 13 is connected to the first embedded plate 11 through the anchor bolt 14, the first embedded sleeve 13 can be welded to the other side of the first positioning plate 11 after connection is completed, and the assembled displacement box assembly 12 is connected through the anchor bolt 14. After the second positioning plate 22 is machined in a factory, the second embedded sleeves 21 are connected to the second positioning plate 22 through the anchor bolts 14, and after connection, the second embedded sleeves 21 can be welded on the other surface of the second positioning plate 22.
After the beam body of job site falls to the position, can weld the embedded steel bar in locating plate and the preformed groove (the project portion is when pouring the beam body according to the design drawing) that assemble in advance and carry out welded connection, embedded sleeve and displacement case subassembly 12 can cross the steel bar as required and connect, also can weld the steel bar cage and consolidate.
Then install waterproof rubber component 4 according to the uniform height, can pour the concrete at this moment after the installation is accomplished, after the concrete reaches technical requirement intensity, lay the technology apron on the concrete, can allow engineering construction vehicle to pass through. After the bridge floor is paved, only cutting the asphalt paving surface, removing the process cover plate, installing the stainless steel sliding plate 3, the main toothed plate 1 and the auxiliary toothed plate 2, connecting by adopting anchor bolts, pouring epoxy resin after the anchor bolts are screwed, and completing the installation. The installation process does not need to be grooved again, so that the later installation time is saved, and the project progress is accelerated.
When the product is damaged, grooving is not needed, anchoring parts are not needed to be embedded again, concrete is not needed to be poured again, the main toothed plate 1 and the auxiliary toothed plate 2 can be replaced only by detaching the anchoring bolts 14 on the main toothed plate 1 and the auxiliary toothed plate 2, the time consumption in the process is short, several hours can be expected to be finished, and compared with the traditional replacement and maintenance, a large amount of time is saved for 7-10 days. In addition, when the product has unsmooth displacement performance, only the displacement block in the displacement box component 12 needs to be replaced, the whole product does not need to be replaced, and the waste of manpower and financial resources is reduced.
The shifting box component 12 of the telescopic device has the shock absorption performance, so that the vehicle can stably pass through and the vehicle jumping is reduced.
The telescopic device has stronger telescopic performance, reasonably absorbs shock, reduces noise, is more convenient to install and replace, saves time and meets the requirement of stable and comfortable passing of vehicles.
The assembled environment-friendly noise-reducing comb-tooth type expansion device provided by the invention is not limited to the structure, and any modification, equivalent replacement, improvement and the like on the basis of the invention are all included in the protection scope of the invention.
Claims (8)
1. The utility model provides an assembly environmental protection comb tooth type telescoping device of making an uproar that falls which characterized in that: including installing main pinion rack and the vice pinion rack at bridge main part fracture department both ends, main pinion rack is provided with the first comb tooth that is listed as, vice pinion rack correspondence is provided with and is listed as the comb tooth with the second of the first comb tooth staggered arrangement, and the below of main pinion rack is provided with first locating component, be equipped with the stainless steel slide below the vice pinion rack, the below of stainless steel slide is provided with second locating component.
2. The assembled environmentally friendly noise reducing comb-tooth type telescopic device according to claim 1, wherein: the first positioning assembly comprises a first positioning plate, a shifting box assembly and a first embedded sleeve, the shifting box assembly and the first embedded sleeve are located between the main toothed plate and the first positioning plate, and the upper end and the lower end of the shifting box assembly and the upper end of the first embedded sleeve are fixedly connected with the main toothed plate and the first positioning plate through anchor bolts respectively.
3. The assembled environmentally friendly noise reducing comb-tooth type telescopic device according to claim 1, wherein: the second positioning assembly comprises a stainless steel sliding plate, a second embedded sleeve and a second positioning plate are arranged below the stainless steel sliding plate, the second embedded sleeve is located between the second positioning plate and the stainless steel sliding plate, and the upper end and the lower end of the second embedded sleeve are fixedly connected with the auxiliary toothed plate and the second positioning plate through anchor bolts respectively.
4. The assembled environmentally friendly noise reducing comb-tooth type telescopic device according to claim 1, wherein: and the beam end gap between the main toothed plate and the auxiliary toothed plate is provided with a waterproof rubber assembly, two ends of the waterproof rubber assembly are fixed by adopting angle iron, and the angle iron is fixed on the first positioning plate or the second positioning plate through a fixing bolt.
5. The assembled environmentally friendly noise reducing comb-tooth type telescopic device of claim 4, wherein: the angle iron on one side of the auxiliary toothed plate is positioned below the stainless steel sliding plate, and the angle iron on one side of the main toothed plate is positioned below the main toothed plate.
6. The assembled environmentally friendly noise reducing comb-tooth type telescopic device according to claim 1, wherein: the first positioning plate below the main toothed plate and the second positioning plate below the auxiliary toothed plate are identical in structure and height.
7. The assembled environmentally friendly noise reducing comb-tooth type telescopic device according to claim 2, wherein: first locating plate carries out welded connection with the embedded steel bar in the reservation tank, and first embedded sleeve and displacement box subassembly are through crossing steel bar connection, perhaps consolidate through welded steel bar cage.
8. The assembled environmentally friendly noise reducing comb-tooth type telescopic device according to claim 3, wherein: the second locating plate carries out welded connection with the embedded steel bar in the preformed groove, and the embedded sleeve of second is through crossing the steel bar connection, perhaps consolidates through welding reinforcement cage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110792764.9A CN113481842B (en) | 2021-07-14 | 2021-07-14 | Assembly environmental protection is fallen and is fallen broach type telescoping device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110792764.9A CN113481842B (en) | 2021-07-14 | 2021-07-14 | Assembly environmental protection is fallen and is fallen broach type telescoping device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113481842A true CN113481842A (en) | 2021-10-08 |
| CN113481842B CN113481842B (en) | 2021-12-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110792764.9A Active CN113481842B (en) | 2021-07-14 | 2021-07-14 | Assembly environmental protection is fallen and is fallen broach type telescoping device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113481842B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003064613A (en) * | 2001-08-28 | 2003-03-05 | Hanshin Expressway Public Corp | Structure of expansion joint for bridge |
| CN202744946U (en) * | 2012-09-27 | 2013-02-20 | 衡水橡胶股份有限公司 | Noise-reduction multidirectional-shift comb-tooth-type bridge expansion and contraction device |
| CN204080625U (en) * | 2014-09-16 | 2015-01-07 | 衡水亿力工程橡胶机械制造有限公司 | There is the board-like stretching device of comb of multi-directional deflection function |
| CN207143720U (en) * | 2017-07-21 | 2018-03-27 | 衡水中盛工程橡胶有限公司 | A kind of separate type multi-directional deflection comb teeth retractor device |
| CN207987723U (en) * | 2018-01-17 | 2018-10-19 | 衡水中交信德工程橡塑有限公司 | A kind of magnetic force noise reduction multi-directional deflection telescopic device |
| CN108914768A (en) * | 2018-07-26 | 2018-11-30 | 广东德利路桥装备科技有限公司 | A kind of high damping vibration attenuation noise reduction multi-directional deflection telescopic device |
| CN111979910A (en) * | 2020-09-07 | 2020-11-24 | 河北泰勒铁路器材有限公司 | Shock-absorbing noise-reducing telescopic device and method for mounting and replacing same and reconstructing existing telescopic device |
-
2021
- 2021-07-14 CN CN202110792764.9A patent/CN113481842B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003064613A (en) * | 2001-08-28 | 2003-03-05 | Hanshin Expressway Public Corp | Structure of expansion joint for bridge |
| CN202744946U (en) * | 2012-09-27 | 2013-02-20 | 衡水橡胶股份有限公司 | Noise-reduction multidirectional-shift comb-tooth-type bridge expansion and contraction device |
| CN204080625U (en) * | 2014-09-16 | 2015-01-07 | 衡水亿力工程橡胶机械制造有限公司 | There is the board-like stretching device of comb of multi-directional deflection function |
| CN207143720U (en) * | 2017-07-21 | 2018-03-27 | 衡水中盛工程橡胶有限公司 | A kind of separate type multi-directional deflection comb teeth retractor device |
| CN207987723U (en) * | 2018-01-17 | 2018-10-19 | 衡水中交信德工程橡塑有限公司 | A kind of magnetic force noise reduction multi-directional deflection telescopic device |
| CN108914768A (en) * | 2018-07-26 | 2018-11-30 | 广东德利路桥装备科技有限公司 | A kind of high damping vibration attenuation noise reduction multi-directional deflection telescopic device |
| CN111979910A (en) * | 2020-09-07 | 2020-11-24 | 河北泰勒铁路器材有限公司 | Shock-absorbing noise-reducing telescopic device and method for mounting and replacing same and reconstructing existing telescopic device |
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| CN113481842B (en) | 2021-12-31 |
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Denomination of invention: An environmentally friendly and noise reducing comb shaped telescopic device for assembly Effective date of registration: 20230520 Granted publication date: 20211231 Pledgee: Zhejiang Chun'an Rural Commercial Bank Co.,Ltd. Fenkou Branch Pledgor: Zhongsheng Road & Bridge Technology Group Co.,Ltd. Registration number: Y2023980041221 |