CN207739399U - A kind of friction antiskid bearing applied to steel construction - Google Patents
A kind of friction antiskid bearing applied to steel construction Download PDFInfo
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- CN207739399U CN207739399U CN201721793028.0U CN201721793028U CN207739399U CN 207739399 U CN207739399 U CN 207739399U CN 201721793028 U CN201721793028 U CN 201721793028U CN 207739399 U CN207739399 U CN 207739399U
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- lead screw
- block
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 43
- 239000010959 steel Substances 0.000 title claims abstract description 43
- 238000010276 construction Methods 0.000 title claims abstract description 26
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims abstract description 56
- 229920001971 elastomer Polymers 0.000 claims description 6
- 239000005060 rubber Substances 0.000 claims description 6
- 238000000034 method Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 229910000975 Carbon steel Inorganic materials 0.000 description 2
- 241000237858 Gastropoda Species 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 239000010962 carbon steel Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 210000003205 muscle Anatomy 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model discloses a kind of friction antiskid bearings applied to steel construction, including pedestal, the inner rotation of the pedestal is connected with worm screw, the right end of the worm screw runs through pedestal and extends to the right side of pedestal, and the right end of worm screw is installed with rocking handle, the inside of the pedestal is from left to right threaded with the first lead screw and the second lead screw successively, the bottom end of first lead screw and the second lead screw runs through pedestal and extends to the lower section of pedestal, the surface of first lead screw and the second lead screw and worm gear is slidably connected by keyway positioned at the inside of pedestal, and the side of worm gear is intermeshed with worm screw, the utility model is related to mechanical equipment technical fields.This is applied to the friction antiskid bearing of steel construction, block is fixed after the second screw rod can be made to inject the first screw rod, it prevents the first screw rod and the second screw rod from relatively rotating and sliding, and can two blocks easily be pressed into centre using bolt, convenient for extracting the second screw rod.
Description
Technical field
The utility model is related to mechanical equipment technical field, specially a kind of friction antiskid branch applied to steel construction
Seat.
Background technology
The chemical composition of steel can be with great changes have taken place, and the steel containing only carbon is known as carbon steel（Carbon steel）Or ordinary steel；
In actual production, steel often contains different alloying elements according to the difference of purposes, such as：Manganese, nickel, vanadium etc..The mankind are to steel
Using quite long with research history, but until Bessemerizing utility model, producing for steel is all a high cost
Inefficient work.Nowadays, steel becomes one of most commonly used material in the world with its cheap price, reliable performance, is
Indispensable ingredient in construction industry, manufacturing industry and people's daily life.It may be said that steel is the material base of modern society.Steel knot
The structure that structure is made of steel material is one of main building construction types.Structure is mainly made of shaped steel and steel plate etc.
The components composition such as girder steel, steel column, steel truss, generally use weld seam, bolt or rivet interlacement between each component or component.Because of it
Dead weight is lighter, and easy construction, is widely used in the fields such as large-sized workshop, venue, Super High.The characteristics of steel be intensity it is high,
From heavy and light, overall stiffness is good, deformability is strong, therefore for building large span and the building of superelevation, superduty is particularly suitable；Material
Expect that homogeneity and isotropism are good, belongs to perfect elastic body, best suit the basic assumption of common engineering mechanics；Material plasticity, toughness
It is good, there can be moderate finite deformation, dynamic load can be born well；Construction period is short；Its industrialization degree is high, can carry out mechanization journey
High Virtual production is spent, steel construction should study high strength steel, greatly improve its yield point strength；In addition new varieties to be rolled
Shaped steel, such as H profile steel（Also known as wide width wing edge shaped steel）With T steel and profiled sheet etc. to adapt to longspan structure and Super High
The needs of building, in addition also whether there is or not heat bridge lightweight steel construction system, building itself is not energy-efficient, and this technology is connected with cleverly extraordinary
Fitting solves the problems, such as the cold-heat bridge of building；Jack truss structure makes cable and upper and lower conduit road be passed through in wall, and construction finishing is all
It is convenient.
When working on steelframe, tool is not easy to place worker, because of nowhere place tool on steelframe, so usually using
With sack is hung over, but some tools are more heavy, hang over and bear larger, consumption worker's muscle power with it, and tool is placed on bag
In son, inconvenience is taken, reduces working efficiency, influences job schedule.
Utility model content
In view of the deficiencies of the prior art, the utility model provides a kind of friction antiskid bearing applied to steel construction,
Worker is solved when working on steelframe, tool is not easy to place, because of nowhere place tool on steelframe, so usually using bag
With son is hung over, but some tools are more heavy, hang over and bear larger, consumption worker's muscle power with it, and tool is placed on sack
In, the problem of taking inconvenience, reduce working efficiency, influence job schedule.
In order to achieve the above object, the utility model is achieved by the following technical programs：It is a kind of applied to steel construction
Rub antiskid bearing, including pedestal, and the inner rotation of the pedestal is connected with worm screw, and the right end of the worm screw runs through pedestal simultaneously
The right side of pedestal is extended to, and the right end of worm screw is installed with rocking handle, from left to right screw thread connects successively for the inside of the pedestal
It is connected to the first lead screw and the second lead screw, the bottom end of first lead screw and the second lead screw is run through pedestal and extended under pedestal
Side, the surface of first lead screw and the second lead screw and slidably connects worm gear, and snail positioned at the inside of pedestal by keyway
The side of wheel is installed with limited block with worm screw intermeshing, the inside of the pedestal and the both sides up and down for being located at worm gear,
The bottom end of first lead screw and the second lead screw slidably connects the first geometrical clamp and the second geometrical clamp by sliding block respectively.
Preferably, the bottom of first geometrical clamp and the second geometrical clamp is installed with the first gripping block and second respectively
The inside of gripping block, first gripping block and the second gripping block is threaded with the first screw rod and the second screw rod respectively.
Preferably, the inside of second screw rod slidably connects block by sliding slot, and there are two the block settings, and
Axisymmetrical about the second screw rod is distributed, and spring is fixedly connected between the block described in two.
Preferably, the inside of first screw rod offers groove compatible with the second screw rod, first screw rod
Position internal and corresponding with block slidably connects bolt, and one end of the bolt through the first screw rod and extends to first
The outside of screw rod.
Preferably, the centre of the base top is rotatably connected to top plate, the left and right of the base top by fixed frame
Both sides are installed with sliding sleeve, and the internal slide of the sliding sleeve is connected with supporting rod, and the bottom on the top of supporting rod and top plate
Portion is rotatablely connected, and the side of the sliding sleeve is threaded with fastening bolt.
Preferably, the bottom of the pedestal and the top of the first geometrical clamp and the second geometrical clamp are installed with skid-proof rubber
It pads, side plate is installed at the top of the top plate.
Preferably, one end that first screw rod and the second screw rod are located remotely from each other is installed with turning handle, and described first
The surface of screw rod and the second screw rod offers the opposite screw thread in direction.
Work step：
First geometrical clamp and the second geometrical clamp are sleeved below steelframe by step 1 first, the first geometrical clamp and the second fixation
It presss from both sides and is pushed to centre, so that the second screw rod left end is injected in the first screw rod, block flicks under the elastic force of spring, by the second screw rod card
In the first screw rod, then two turning handles are rotate in same direction, so that the first screw rod and the second screw rod is rotate in same direction, the first gripping block and second
Gripping block drives the first geometrical clamp and the second geometrical clamp to be drawn close to centre, the both sides of steelframe is clamped, so as to complete to steelframe
The clamping process of both sides；
Step 2, again by shake rocking handle, drive worm screw rotation, utilize intermeshing two worm gears drive the first lead screw
It is rotated with the second lead screw, the first lead screw and the rotation of the second lead screw are connect with whorl of base, keep the first lead screw and the second lead screw upward
It is mobile, and the first geometrical clamp and the second geometrical clamp is pulled to move up, antiskid rubber is close to steelframe, so as to complete to steelframe
The clamping process of upper and lower both sides；
Step 3, according to steelframe angle, left and right pulls top plate to make its level, then tightens fastening bolt, finally places tool
On top plate, you can complete the placement of tool；
Step 4, dismounting when, reversely shake rocking handle, the first geometrical clamp and the second geometrical clamp made to move down, then by bolt to
Centre is pinched, and bolt pushes block to be retracted in the second screw rod, rotates backward the turning handle of the second screw rod right end, makes the second screw rod from first
It is rotated out in screw rod, then rotates backward the first screw rod, so that the first geometrical clamp and the second geometrical clamp is separated to both sides, finally remove
Device, so as to complete the dismounting of device.
Advantageous effect
The utility model provides a kind of friction antiskid bearing applied to steel construction.Has following advantageous effect：
（1）, should applied to steel construction friction antiskid bearing, by symmetrically being set by front and back in the inside of the second screw rod
Block there are two setting, and spring is fixedly connected between two blocks, the inside of the first screw rod is offered mutually fits with the second screw rod
The groove matched, and the inside of the first screw rod and position corresponding with block slidably connect bolt, one end of bolt is through the
One screw rod and the outside for extending to the first screw rod, block are fixed after the second screw rod can be made to inject the first screw rod, prevent the
One screw rod and the second screw rod relatively rotate and sliding, and can two blocks easily be pressed to centre using bolt, convenient for extracting
Second screw rod.
（2）, should applied to steel construction friction antiskid bearing, by being connected with worm screw, snail in the inner rotation of pedestal
The right end of bar is installed with rocking handle, and the inside of pedestal is from left to right threaded with the first lead screw and the second lead screw successively,
The surface of first lead screw and the second lead screw and worm gear is slidably connected by keyway positioned at the inside of pedestal, keyway makes worm gear can
It is slided relative to the first lead screw and the second lead screw, but not rotatable, the bottom end of first lead screw and the second lead screw is slided respectively
It is connected with the first geometrical clamp and the second geometrical clamp, the first lead screw and the second lead screw can be made by intermeshing worm gear and worm screw
Pull the first geometrical clamp and the second geometrical clamp by steelframe clamping, anti-locking apparatus slides on steelframe, easy to operate, easy to use,
Clamping effect is preferable.
（3）, should applied to steel construction friction antiskid bearing, by the bottom of the first geometrical clamp and the second geometrical clamp
It is installed with the first gripping block and the second gripping block respectively, the inside of the first gripping block and the second gripping block is threadedly coupled respectively
There are the first screw rod and the second screw rod, and the surface of the first screw rod and the second screw rod offers the opposite screw thread in direction, the first screw rod
The first gripping block and the second gripping block can be made close to each other with the second screw rod, and then the first geometrical clamp and the second geometrical clamp is made to clamp
Steelframe, it is easy to operate, and the screw thread that opposite direction is arranged is convenient for operation.
（4）, should applied to steel construction friction antiskid bearing, rotated by fixed frame by the centre in base top
It is connected with top plate, the left and right sides of base top is installed with sliding sleeve, and the internal slide of sliding sleeve is connected with supporting rod, and props up
The top of strut and the lower rotation of top plate connect, and allow top plate relative to base rotation, and then can be according to steelframe gradient
Adjusting top plate angle makes its level, is convenient for place tool, applied widely, and will be propped up using the fastening bolt of the side of sliding sleeve
Strut and sliding sleeve clamping, and the side plate being arranged at the top of top plate, can prevent tool from being slid from top plate side.
Description of the drawings
Fig. 1 is the structural schematic diagram of the utility model；
Fig. 2 is the partial enlarged view at A in the utility model Fig. 1；
Fig. 3 is the partial sectional view of the utility model the first screw rod and the second screw rod.
In figure：1 pedestal, 2 worm screws, 3 rocking handles, 4 first lead screws, 5 second lead screws, 6 keyways, 7 worm gears, 8 limited blocks, 9 first
Geometrical clamp, 10 second geometrical clamps, 11 first gripping blocks, 12 second gripping blocks, 13 first screw rods, 14 second screw rods, 15 blocks, 16
Spring, 17 bolts, 18 fixed frames, 19 top plates, 20 sliding sleeves, 21 antiskid rubbers, 22 side plates, 23 turning handles, 24 supporting rods, 25 fastening spiral shells
Bolt.
Specific implementation mode
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
The every other embodiment obtained, shall fall within the protection scope of the present invention.
- 3 are please referred to Fig.1, the utility model provides a kind of technical solution：A kind of friction antiskid branch applied to steel construction
The centre of seat, including pedestal 1,1 top of pedestal is rotatably connected to top plate 19, the left and right sides at 1 top of pedestal by fixed frame 18
It is installed with sliding sleeve 20, the internal slide of sliding sleeve 20 is connected with supporting rod 24, and the top of supporting rod 24 and top plate 19
Lower rotation connects, and top plate 19 is allow to be rotated relative to pedestal 1, and then the angle of top plate 19 can be adjusted according to steelframe gradient
Make its level, is convenient for place tool, applied widely, the side of sliding sleeve 20 is threaded with fastening bolt 25, the bottom of pedestal 1
It is installed with antiskid rubber 21 with the top of the first geometrical clamp 9 and the second geometrical clamp 10, antiskid rubber 21 can increase friction
The top of power, anti-locking apparatus sliding, top plate 19 is installed with side plate 22, and side plate 22 is distributed in the edge at 19 top of top plate, can
Prevent tool from being slid from 19 side of top plate, the inner rotation of pedestal 1 is connected with worm screw 2, and the right end of worm screw 2 through pedestal 1 and prolongs
The right side of pedestal 1 is extended to, and the right end of worm screw 2 is installed with rocking handle 3, the inside of pedestal 1 is from left to right threadedly coupled successively
There are the first lead screw 4 and the second lead screw 5, the bottom end of the first lead screw 4 and the second lead screw 5 is run through pedestal and extended under pedestal 1
Side, the surface of the first lead screw 4 and the second lead screw 5 and slidably connects worm gear 7, worm gear positioned at the inside of pedestal 1 by keyway 6
Key compatible with keyway 6 is provided in 7, keyway 6 makes worm gear 7 that can be slided relative to the first lead screw 4 and the second lead screw 5, but not
Rotatably, and the side of worm gear 7 is intermeshed with worm screw 2, the fixed peace in the inside of pedestal 1 and the both sides up and down for being located at worm gear 7
Equipped with limited block 8, limited block 8 can prevent worm gear 7 from moving up and down, and then be detached from worm screw 2, the bottom of the first lead screw 4 and the second lead screw 5
End slidably connects the first geometrical clamp 9 and the second geometrical clamp 10 respectively by sliding block, and the first lead screw 4 and the second lead screw 5 is made to pull
By steelframe clamping, anti-locking apparatus slides on steelframe, easy to operate, easy to use for first geometrical clamp 9 and the second geometrical clamp 10, folder
Tight effect is preferable, and the bottom of the first geometrical clamp 9 and the second geometrical clamp 10 is installed with the first gripping block 11 and second folder respectively
The inside of tight block 12, the first gripping block 11 and the second gripping block 12 is threaded with the first screw rod 13 and the second screw rod 14 respectively,
The inside of second screw rod 14 slidably connects block 15 by sliding slot, and the top of block 15 is set as inclined-plane, and block 15 is provided with
Two, and be distributed about the axisymmetrical of the second screw rod 14, it is fixedly connected with spring 16, the first screw rod 13 between two blocks 15
Inside offer groove compatible with the second screw rod 14, can by the second screw rod 14 inject the first screw rod 13 in, the first screw rod
13 inside and position corresponding with block 15 slidably connect bolt 17, and one end of bolt 17 through the first screw rod 13 and is prolonged
The outside of the first screw rod 13 is extended to, block 15 is fixed after the second screw rod 14 can be made to inject the first screw rod 13, prevents first
Screw rod 13 and the second screw rod 14 relatively rotate and sliding, and can two blocks 15 easily be pressed to centre using bolt 17, just
In extracting the second screw rod 14, one end that the first screw rod 13 and the second screw rod 14 are located remotely from each other is installed with turning handle 23, and first
The surface of screw rod 13 and the second screw rod 14 offers the opposite screw thread in direction, and the first screw rod 13 and the second screw rod 14 can make the first folder
11 and second gripping block 12 of tight block is close to each other, and then the first geometrical clamp 9 and the second geometrical clamp 10 is made to clamp steelframe, operation letter
It is single, and the screw thread that opposite direction is arranged is convenient for operation.
It should be noted that herein, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also include other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.
While there has been shown and described that the embodiments of the present invention, for the ordinary skill in the art,
It is appreciated that can these embodiments be carried out with a variety of variations in the case where not departing from the principles of the present invention and spirit, repaiied
Change, replace and modification, the scope of the utility model are defined by the appended claims and the equivalents thereof.
Claims (7)
1. a kind of friction antiskid bearing applied to steel construction, including pedestal (1), it is characterised in that：The pedestal (1) it is interior
Portion is rotatably connected to worm screw (2), and the right end of the worm screw (2) runs through pedestal (1) and extends to the right side of pedestal (1), and worm screw
(2) right end is installed with rocking handle (3), and the inside of the pedestal (1) is from left to right threaded with the first lead screw (4) successively
With the second lead screw (5), the bottom end of first lead screw (4) and the second lead screw (5) is run through pedestal and is extended under pedestal (1)
Side, the surface of first lead screw (4) and the second lead screw (5) and the inside for being located at pedestal (1) are slidably connected by keyway (6)
There is worm gear (7), and the side of worm gear (7) is with worm screw (2) intermeshing, the inside of the pedestal (1) and positioned at the upper of worm gear (7)
Lower both sides are installed with limited block (8), and the bottom end of first lead screw (4) and the second lead screw (5) is slided respectively by sliding block
It is dynamic to be connected with the first geometrical clamp (9) and the second geometrical clamp (10).
2. a kind of friction antiskid bearing applied to steel construction according to claim 1, it is characterised in that：Described first
The bottom of geometrical clamp (9) and the second geometrical clamp (10) is installed with the first gripping block (11) and the second gripping block (12) respectively,
The inside of first gripping block (11) and the second gripping block (12) is threaded with the first screw rod (13) and the second screw rod respectively
(14)。
3. a kind of friction antiskid bearing applied to steel construction according to claim 2, it is characterised in that：Described second
The inside of screw rod (14) slidably connects block (15) by sliding slot, and there are two block (15) settings, and about the second spiral shell
The axisymmetrical of bar (14) is distributed, and spring (16) is fixedly connected between the block (15) described in two.
4. a kind of friction antiskid bearing applied to steel construction according to claim 2, it is characterised in that：Described first
The inside of screw rod (13) offers the compatible groove with the second screw rod (14), the inside of first screw rod (13) and and block
(15) corresponding position slidably connects bolt (17), and one end of the bolt (17) through the first screw rod (13) and extends to
The outside of first screw rod (13).
5. a kind of friction antiskid bearing applied to steel construction according to claim 1, it is characterised in that：The pedestal
(1) centre at the top of is rotatably connected to top plate (19) by fixed frame (18), and the left and right sides at the top of the pedestal (1) is fixed
Sliding sleeve (20) is installed, the internal slide of the sliding sleeve (20) is connected with supporting rod (24), and the top and top of supporting rod (24)
The lower rotation of plate (19) connects, and the side of the sliding sleeve (20) is threaded with fastening bolt (25).
6. a kind of friction antiskid bearing applied to steel construction according to claim 5, it is characterised in that：The pedestal
(1) bottom and the top of the first geometrical clamp (9) and the second geometrical clamp (10) are installed with antiskid rubber (21), the top
Side plate (22) is installed at the top of plate (19).
7. a kind of friction antiskid bearing applied to steel construction according to claim 2, it is characterised in that：Described first
One end that screw rod (13) and the second screw rod (14) are located remotely from each other is installed with turning handle (23), first screw rod (13) and
The surface of two screw rods (14) offers the opposite screw thread in direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721793028.0U CN207739399U (en) | 2017-12-20 | 2017-12-20 | A kind of friction antiskid bearing applied to steel construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721793028.0U CN207739399U (en) | 2017-12-20 | 2017-12-20 | A kind of friction antiskid bearing applied to steel construction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207739399U true CN207739399U (en) | 2018-08-17 |
Family
ID=63118814
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721793028.0U Active CN207739399U (en) | 2017-12-20 | 2017-12-20 | A kind of friction antiskid bearing applied to steel construction |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207739399U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107938853A (en) * | 2017-12-20 | 2018-04-20 | 潮峰钢构集团有限公司 | A kind of friction antiskid bearing and its operating method applied to steel construction |
| CN114164777A (en) * | 2021-11-29 | 2022-03-11 | 曹建枫 | Overpass sound barrier |
-
2017
- 2017-12-20 CN CN201721793028.0U patent/CN207739399U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107938853A (en) * | 2017-12-20 | 2018-04-20 | 潮峰钢构集团有限公司 | A kind of friction antiskid bearing and its operating method applied to steel construction |
| CN107938853B (en) * | 2017-12-20 | 2023-11-10 | 潮峰钢构集团有限公司 | Friction anti-slip support applied to steel structure and operation method thereof |
| CN114164777A (en) * | 2021-11-29 | 2022-03-11 | 曹建枫 | Overpass sound barrier |
| CN114164777B (en) * | 2021-11-29 | 2023-10-31 | 安平县佳旺五金丝网制品有限公司 | Overpass sound barrier |
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