CN106702882A - Hydraulic force distribution buffering device - Google Patents
Hydraulic force distribution buffering device Download PDFInfo
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- CN106702882A CN106702882A CN201510770223.0A CN201510770223A CN106702882A CN 106702882 A CN106702882 A CN 106702882A CN 201510770223 A CN201510770223 A CN 201510770223A CN 106702882 A CN106702882 A CN 106702882A
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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
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Abstract
The invention discloses a hydraulic force distribution buffering device which comprises a double-rod piston hydraulic cylinder with a reset spring internally arranged. Two hydraulic bypasses communicating with oil cylinder cavities in the two sides of a piston through oil pipes are arranged on the double-rod piston hydraulic cylinder. The two hydraulic bypasses are each provided with a control valve using the decompressing effect for buffering and distributing braking and earthquake impact force transmitted to the double-rod piston hydraulic cylinder by bridge girders, and the installation directions of the two control valves are opposite to each other. A first installation lug connected with the free end of a piston rod is arranged at one end of the double-rod piston hydraulic cylinder, and a second installation lug fixedly connected with the cylinder body end face of the double-rod piston hydraulic cylinder is further arranged at the other end of the double-rod piston hydraulic cylinder. The hydraulic force distribution buffering device is used for connecting adjacent bridge span girders (plates), the braking and earthquake horizontal impact force borne by the girders (plates) is distributed to adjacent multi-span piers, the impact force is borne by the multiple piers together, and the piers are effectively prevented from inclining or the bridge girders (plates) are effectively prevented from falling.
Description
Technical field
The present invention relates to a kind of hydraulic pressure component buffer unit, bridge is applied to adjacent across girder（Plate）Connection, it can be bridge girder（Plate）The horizontal impact power such as brake, earthquake for bearing is assigned to adjacent multispan bridge pier up, by multiple bridge pier shared impulsive forces, prevents pier slope or bridge girder（Plate）Fall, can be widely applied to railway, highway, the elevated bridge in city, diversion transfer bridge etc. needs to resist the structure of impact load.
Background technology
For railway, highway, city elevated bridge, due to needing to eliminate the temperature stress of bridge structure that the temperature difference causes, the bridge structure form of many use simply supported beams, bridge girder（Plate）One end is mobile support saddle 23, and the other end is hold-down support 24（See Fig. 4）, bridge girder（Plate）Can freely be stretched with release temperature stress on bridge pier 25.But, this structure can not bear the horizontal impact loads such as excessive brake or startup, earthquake, and otherwise bridge pier is particularly the pile bridge pier high of even up to a hundred meters of tens of rice, it is easy to is inclined by the effect of horizontal impact power or causes bridge girder（Plate）Fall.
Therefore, can using hydraulic pressure component buffer unit it is adjacent it is each across girder（Plate）Couple together（See Fig. 5）, the horizontal impact power such as brake, earthquake is assigned to adjacent multispan bridge pier up, withstood shocks jointly power by multiple bridge piers, can effectively prevent pier slope or girder（Plate）Fall.Hydraulic pressure component buffer unit can eliminate the temperature stress of bridge, can buffer and distribute impulsive force load again, and can according to made due to the different condition such as pile foundation buried depth, geological conditions and finite element each bridge pier withstand shocks power ability it is different, impulsive force is assigned to multiple bridge piers up by norm by design requirement.
The content of the invention
For above-mentioned technical problem, the present invention is intended to provide a kind of temperature stress that can eliminate bridge, and can buffer and distribute the hydraulic pressure component buffer unit of impulsive force load.
The present invention adopts the following technical scheme that to realize：
A kind of hydraulic pressure component buffer unit, including an interior through-rod piston hydraulic cylinder for setting back-moving spring, two hydraulic pressure for connecting the side cylinder cavity of piston two by oil pipe are provided with the through-rod piston hydraulic cylinder to bypass, it is provided with using depressurization to buffer and distribute the control valve that bridge girder passes to the brake of through-rod piston hydraulic cylinder, earthquake shock power in two hydraulic pressure bypasses, one end of the through-rod piston hydraulic cylinder is provided with the first mounting ear of connection piston rod free end, and the other end is additionally provided with the second mounting ear being fixedly connected with the cylinder body end face of through-rod piston hydraulic cylinder.
This programme is adjacent across girder using hydraulic pressure component buffer unit connection bridge（Plate）, its both sides for being installed on girder two ends, girder（Plate）The horizontal impact power such as brake, earthquake for bearing is assigned to adjacent multispan bridge pier up, by multiple bridge pier shared impulsive forces, prevents pier slope or bridge girder（Plate）Fall, can be applied to the structures such as railway, highway, the elevated bridge in city, diversion transfer bridge resistance impact load.
Further, it is described to control valve to be formed with check valve tandem compound for choke valve, overflow valve, constituted by choke valve is in parallel with overflow valve, or it is in series with choke valve by pressure-reducing valve, or by choke valve, check valve, overflow valve, pressure-reducing valve wherein one or more connection in series-parallel is combined, under impact tension or surge effect, the left chamber of hydraulic cylinder is different from the oil pressure of right chamber, hydraulic oil is set to be flowed between the chamber of left and right by controlling valve, control valve using different load characteristics and combinations thereof, realize to the quota buffering of impact load and distribution, impact load is assigned on each bridge pier on request.
Further, cylinder body one end outside of the through-rod piston hydraulic cylinder is provided with throttling pore connection through-rod piston cylinder chamber and annular air-pocket, the volume of the annular air-pocket is adapted with the stroke of bridge girder, annular air-pocket is by throttling pore and hydraulic cylinder chamber, the hydraulic oil volume bulbs of pressure for causing can be raised with release temperature, relative to the quick change of impact load, temperature change is slow, the temperature stress change for causing is also slow, oil cylinder or so cavity pressure can be made to reach balance using the restriction for controlling valve normally opened so that girder（Plate）Slowly can freely stretch and discharge its temperature stress, or girder is absorbed by annular air-pocket（Plate）Temperature stress.Hydraulic oil in hydraulic pressure component buffer unit riddles hydraulic cylinder of closing or so chamber, when the temperature increases, the volume of hydraulic oil will produce and somewhat expand and raise oil pressure, this expansion oil pressure can be discharged by throttling pore and annular air-pocket, and for fast-changing impact load, cannot be delivered on air bag because micro orifice produces large drag forces, thus air bag has no effect on hydraulic pressure component buffer unit to the distribution of impact load and the characteristic of buffering.
Further, the annular air-pocket outer cover is covered with the annular air-pocket shell being fixed on the outside of the cylinder body of the through-rod piston hydraulic cylinder, plays protection and support to annular air-pocket etc. and acts on.
Further, the cylinder body of the through-rod piston hydraulic cylinder includes one end open, the tubular Master cylinder body 1 that one end seals and the cylinder cap and seal washer that are fixed on by cylinder bolt at Master cylinder body opening.
Further, second mounting ear is sealed by one end, the cylinder body end face of the tubular of the one end open dust-proof cylinder body connection through-rod piston hydraulic cylinder, mutually welded with the second mounting ear in the sealed end outside of the dust-proof cylinder body, the openend of the dust-proof cylinder body connects the cylinder body end face of the through-rod piston hydraulic cylinder by connecting bolt, flange and pad, both it had been used to protect piston rod from dirt, the pollution of dust, its durability is improved, the load that withstands shocks is played a part of again.
Further, it is provided with steam vent on the dust-proof cylinder body, it is to avoid dust-proof cylinder body excessive pressure because the temperature difference overstocks.
Further, protection piston rod is provided with outside the piston rod of the first mounting ear of connection from dirt, dust pollution dirt-proof boot.
Further, the dirt-proof boot is scalable corrugated rubber set, with favorable elasticity and retractility.
Compared to existing technology, this hydraulic pressure component buffer unit has the characteristics that：
1st, can transmit and adjust fast-changing load, discharge slowly varying load, adapt to the impulsive forces such as simply supported beam form bridge resistance brake, earthquake, the load characteristic requirement of release temperature iso-stress.
2nd, impact load can by norm be distributed, adaptation makes bridge pier have different ability to bears to impact load, impulsive force is assigned on different bridge piers by design requirement due to different conditions such as pile foundation buried depth, geological conditions and finite elements.
3rd, hydraulic jack or so chamber is full of hydraulic oil, and the load for not having space, transmission steadily increases and decreases, and occurs without the impact phenomenon of moment startup.
4th, annular air-pocket plays a part of to absorb the expansion oil pressure that temperature raises generation, and release bridge girder by micro orifice（Plate）The miscellaneous function of temperature stress.
5th, the moving component of hydraulic pressure component buffer unit obtains good lubrication all among hydraulic oil, and can prevent oxidation corrosion, and durability is high.
6th, bidirectional piston bar has guide effect simultaneously, can reduce piston wear, prevents holding, improves operational reliability.
Brief description of the drawings
Fig. 1 is hydraulic pressure component buffer unit cross section structure diagram of the invention.
Fig. 2 is hydraulic pressure component buffer unit left view schematic diagram of the invention.
Fig. 3 is hydraulic pressure component buffer unit impact sketch of the invention.
Fig. 4 is traditional bridge pier bearing pad schematic diagram.
Fig. 5 is bridge girder（Plate）Between install hydraulic pressure component buffer unit schematic diagram.
Fig. 6 be Fig. 5 in A-A to schematic cross-sectional view.
Fig. 7 is the first control valve arrangement schematic diagram (choke valve and check valve are connected) of the embodiment of the present invention one.
Fig. 8 is the second control valve arrangement schematic diagram of the embodiment of the present invention one.
Fig. 9 is the impulsive force-load character figure of the embodiment of the present invention one.
Figure 10 is the girder temperature stress performance plot of the embodiment of the present invention one.
Figure 11 is the first control valve arrangement schematic diagram (overflow valve) of the embodiment of the present invention two.
Figure 12 is the second control valve arrangement schematic diagram of the embodiment of the present invention two.
Figure 13 is the impulsive force-load character figure of the embodiment of the present invention two.
Figure 14 is the girder temperature stress performance plot of the embodiment of the present invention two.
Figure 15 is the first control valve arrangement schematic diagram (choke valve is in parallel with overflow valve to be constituted) of the embodiment of the present invention three.
Figure 16 is the second control valve arrangement schematic diagram of the embodiment of the present invention three.
Figure 17 is the impulsive force-load character figure of the embodiment of the present invention three.
Figure 18 is the girder temperature stress performance plot of the embodiment of the present invention three.
Figure 19 is the first control valve arrangement schematic diagram (pressure-reducing valve is in series with choke valve) of the embodiment of the present invention four.
Figure 20 is the second control valve arrangement schematic diagram of the embodiment of the present invention four.
Figure 21 is the impulsive force-load character figure of the embodiment of the present invention four.
Figure 22 is the girder temperature stress performance plot of the embodiment of the present invention four.
It is shown in figure：1- Master cylinder bodies, 2- cylinder caps, 3- pistons, 4- piston rods, 5- back-moving springs, 6- seal washers, 7- sealing rings, 8- cylinder bolts, 9 throttling pores, 10- annular air-pockets, 11- annular air-pockets shell, 12- pads, 13- connecting bolts, the dust-proof cylinder bodies of 14-, 15- steam vents, 16- oil pipes, the controls of 17- first valve, the controls of 18- second valve, 19- dirt-proof boots, 20- mounting ears, 21- hydraulic oil, the right bridge girders of 22-；23- mobile support saddles；24- hold-down supports；25- bridge piers；The left bridge girders of 26-；27- hydraulic pressure component buffer unit mounting grooves.
Specific embodiment
In order in detail and clearly show the present invention implementation purpose and technical scheme, the present invention is described in further details below in conjunction with accompanying drawing and example.Described example is only used for illustrating the present invention, is not whole examples of the invention, is not intended to limit the scope of protection of the invention.
Embodiment one
Such as Fig. 1-3,Shown in Fig. 6-Figure 10,A kind of hydraulic pressure component buffer unit,Including an interior through-rod piston hydraulic cylinder for setting back-moving spring 5,The cylinder body of the through-rod piston hydraulic cylinder includes one end open,The tubular Master cylinder body 1 of one end sealing and the cylinder cap 2 and seal washer 6 that are fixed on by cylinder bolt 8 at the opening of Master cylinder body 1,Two hydraulic pressure for connecting 3 liang of side cylinder cavitys of piston by oil pipe 16 are provided with the through-rod piston hydraulic cylinder to bypass,It is respectively arranged with using depressurization to buffer and distribute the brake that bridge girder passes to through-rod piston hydraulic cylinder in two hydraulic pressure bypasses,The first control control valve 18 of valve 17 and second of earthquake shock power,The first control control valve 18 of valve 17 and second is formed by choke valve with check valve tandem compound,The installation direction of two control valves is opposite each other,When withstand shocks pulling force when,Hydraulic oil flows to right chamber room by controlling valve 17 from left chamber,When withstand shocks pressure when,Hydraulic oil flows to left chamber by controlling valve 18 from right chamber room,When impulsive force is cancelled,Back-moving spring 5 progressively recovers to initial position piston 3.One end of the through-rod piston hydraulic cylinder is provided with the first mounting ear 20 of connection piston rod 4 free end, the other end is additionally provided with the second mounting ear 28 being fixedly connected with the cylinder body end face of through-rod piston hydraulic cylinder, wherein, second mounting ear 28 is sealed by one end, the dust-proof cylinder body 14 of tubular of one end open connects the cylinder body end face of the through-rod piston hydraulic cylinder, steam vent 15 is provided with the dust-proof cylinder body 14, mutually welded with the second mounting ear 28 in the sealed end outside of the dust-proof cylinder body 14, the open end edge of the dust-proof cylinder body 14 passes through connecting bolt 13, flange and pad 12 connect the cylinder body end face of the through-rod piston hydraulic cylinder, both it had been used to protect piston rod from dirt, the pollution of dust, improve its durability, play a part of the load that withstands shocks again.
The cylinder body right-hand member outside of the through-rod piston hydraulic cylinder is provided with throttling pore 9 connection through-rod piston cylinder chamber and annular air-pocket 10, the volume of the annular air-pocket 10 is adapted with the stroke of bridge girder, and the outer cover of the annular air-pocket 10 is covered with the annular air-pocket shell 11 being fixed on the outside of the cylinder body of the through-rod piston hydraulic cylinder.
Protection piston rod is provided with outside the piston rod for connecting the first mounting ear 20 from dirt, dust pollution dirt-proof boot 19, the dirt-proof boot 19 is scalable corrugated rubber set.
When using, the hydraulic pressure component buffer unit of the present embodiment is installed in the hydraulic pressure component buffer unit mounting groove 27 of the end side surface of bridge girder two, left bridge girder 26 and right bridge girder 22 are connected by the first mounting ear 20 and the second mounting ear 28.Fig. 4 is oil cylinder impact sketch.Hydraulic oil 21 is connected by the first control valve 17 full of hydraulic cylinder or so chamber, left and right chamber with the second control valve 18, and control valve is formed by choke valve with check valve tandem compound, and its load characteristic is as shown in Figure 5；Transmission load P increases and increases with impulsive force, and bridge girder（Plate）Temperature stress then discharged completely；Regulation choke valve can realize that the different buffering of impulsive force and distribution are required.When there is the pulling force of impact, oil cylinder left chamber produces oil pressure high and right chamber is low oil pressure, hydraulic oil flows to right chamber room by the first control valve 17 from left chamber, when there is surge, right cavity of cylinder produces oil pressure high and left chamber is low oil pressure, and hydraulic oil flows to left chamber by the second control valve 18 from right chamber room；When impulsive force is cancelled, back-moving spring 5 progressively recovers to initial position piston 3.Annular air-pocket 10 can raise the hydraulic oil volume bulbs of pressure for causing by throttling pore 9 and hydraulic cylinder chamber with release temperature, and for fast-changing impact load, can not be delivered on air bag because micro orifice produces large drag forces；The hydraulic pressure component buffer unit can be applied to the structures such as railway, highway, the elevated bridge in city, diversion transfer bridge resistance impact load.
Embodiment two
As shown in figures 11-14, the present embodiment is with the difference of embodiment one：The control valve uses overflow valve, and the installation direction of two control valves is opposite each other.
Its load characteristic is as shown in Figure 13：Transmission load P first then keeps constant with impulsive force by linear increase（Setting value）, regulation relief valve can be according to design requirement to adjacent bridge girder（Plate）The clearly quantitative impulsive force of distribution；Bridge girder（Plate）Temperature stress major part absorbed by annular air-pocket 10, there is a small amount of temperature stress can impose pretension effect to shrinkage joint, not produce any adverse effect to bridge structure.When there is the pulling force of impact, oil cylinder left chamber produces oil pressure high and right chamber is low oil pressure, and after oil pressure reaches relief valve set pressure, hydraulic oil flows to right chamber room by the first control valve 17 from left chamber；When there is surge, right cavity of cylinder produces oil pressure high and left chamber is low oil pressure, and after oil pressure reaches relief valve set pressure, hydraulic oil flows to left chamber by the second control valve 18 from right chamber room；When impulsive force is cancelled, back-moving spring 5 progressively recovers to initial position piston 3.Annular air-pocket 10 is connected by throttling pore 9 with hydraulic cylinder chamber, can raise the hydraulic oil volume bulbs of pressure for causing with release temperature, and for fast-changing impact load, can not be delivered on annular air-pocket 10 because micro orifice produces large drag forces；The hydraulic pressure component buffer unit can be applied to the structures such as railway, highway, the elevated bridge in city, diversion transfer bridge resistance impact load.
Embodiment three
As shown in Figure 15-Figure 18, the present embodiment is with the difference of embodiment one：The control valve is formed in parallel by choke valve with overflow valve, and the installation direction of two control valves is opposite each other, and its load characteristic is as shown in Figure 17：Transmission load P first increases with impulsive force and then keeps constant（Setting value）, and bridge girder（Plate）Temperature stress then discharged completely；Regulation relief valve, can be according to design requirement to adjacent bridge girder（Plate）The clearly quantitative impulsive force of distribution.When there is the pulling force of impact, oil cylinder left chamber produces oil pressure high and right chamber is low oil pressure, the choke valve that hydraulic oil is first passed through in the first control valve 17 flows to right chamber room from left chamber, after hydraulic oil reaches the pressure of overflow valve setting, hydraulic oil flows to right chamber room by the choke valve and overflow valve in the first control valve 17 from left chamber simultaneously；When there is surge, right cavity of cylinder produces oil pressure high and left chamber is low oil pressure, and hydraulic oil flows to left chamber by above-mentioned identical rule from right chamber room；When impulsive force is cancelled, back-moving spring 5 progressively recovers to initial position piston 3.Annular air-pocket 10 is connected by throttling pore 9 with hydraulic cylinder chamber, can raise the hydraulic oil volume bulbs of pressure for causing with release temperature, and for fast-changing impact load, can not be delivered on air bag greatly very much because micro orifice produces large drag forces；The hydraulic pressure component buffer unit can be applied to the structures such as railway, highway, the elevated bridge in city, diversion transfer bridge resistance impact load.
Example IV
As shown in Figure 19-Figure 22, the present embodiment is with the difference of embodiment one：The control valve is in series using pressure-reducing valve with choke valve, and the installation direction of two control valves is opposite each other, and its load characteristic is as shown in Figure 21；Transmission load P steadily increases with impact load, and bridge girder（Plate）Temperature stress then discharged completely；Regulation pressure-reducing valve and choke valve, can be according to design requirement to adjacent bridge girder（Plate）The impulsive force of different quota allocations is transmitted, and makes bridge structure deformation velocity steady, it is to avoid the impingement phenomenon of adjacent girder during bridge pier big sidesway.When there is the pulling force of impact, oil cylinder left chamber produces oil pressure high and right chamber is low oil pressure, and hydraulic oil flows to right chamber room by the first control valve 17 from left chamber；When there is surge, right cavity of cylinder produces oil pressure high and left chamber is low oil pressure, and hydraulic oil flows to left chamber by the second control valve 18 from right chamber room；When impulsive force is cancelled, back-moving spring 5 progressively recovers to initial position piston 3.Annular air-pocket 19 can raise the hydraulic oil volume bulbs of pressure for causing by throttling pore 9 and hydraulic cylinder chamber with release temperature, and for fast-changing impact load, can not be delivered on air bag because micro orifice produces large drag forces；The hydraulic pressure component buffer unit can be applied to the structures such as railway, highway, the elevated bridge in city, diversion transfer bridge resistance impact load.
The above embodiment of the present invention is only intended to clearly illustrate example of the present invention, and is not the restriction to embodiments of the present invention.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.There is no need and unable to be exhaustive to all of implementation method.All any modification, equivalent and improvement made within the spirit and principles in the present invention etc., should be included within the protection domain of the claims in the present invention.
Claims (9)
1. the through-rod piston hydraulic cylinder of back-moving spring (5) is set in a kind of hydraulic pressure component buffer unit, including one, it is characterised in that：Two hydraulic pressure for connecting the side cylinder cavity of piston (3) two by oil pipe (16) are provided with the through-rod piston hydraulic cylinder to bypass, it is provided with using depressurization to buffer and distribute the control valve that bridge girder passes to the brake of through-rod piston hydraulic cylinder, earthquake shock power in two hydraulic pressure bypasses, one end of the through-rod piston hydraulic cylinder is provided with first mounting ear (20) of connection piston rod (4) free end, and the other end is additionally provided with the second mounting ear (28) being fixedly connected with the cylinder body end face of through-rod piston hydraulic cylinder.
2. hydraulic pressure component buffer unit according to claim 1, it is characterised in that：It is described to control valve to be formed with check valve tandem compound for choke valve, overflow valve, constituted or in series by pressure-reducing valve and choke valve by choke valve is in parallel with overflow valve.
3. the hydraulic pressure component buffer unit according to any one of claim 1 or 2, it is characterised in that：Cylinder body one end outside of the through-rod piston hydraulic cylinder is provided with throttling pore (9) connection through-rod piston cylinder chamber and annular air-pocket (10), and the volume of the annular air-pocket (10) is adapted with the stroke of bridge girder.
4. hydraulic pressure component buffer unit according to claim 3, it is characterised in that：Annular air-pocket (10) outer cover is covered with the annular air-pocket shell (11) being fixed on the outside of the cylinder body of the through-rod piston hydraulic cylinder.
5. hydraulic pressure component buffer unit according to claim 3, it is characterised in that：The cylinder body of the through-rod piston hydraulic cylinder includes one end open, the tubular Master cylinder body (1) that one end seals and the cylinder cap (2) and seal washer (6) that are fixed on by cylinder bolt (8) at Master cylinder body (1) opening.
6. hydraulic pressure component buffer unit according to claim 1 and 2, it is characterised in that：Second mounting ear (28) is sealed by one end, the cylinder body end face of the dust-proof cylinder body of the tubular (14) of the one end open connection through-rod piston hydraulic cylinder, mutually welded with the second mounting ear (28) in the sealed end outside of the dust-proof cylinder body (14), the open end edge of the dust-proof cylinder body (14) connects the cylinder body end face of the through-rod piston hydraulic cylinder by connecting bolt (13), flange and pad (12), both it had been used to protect piston rod from dirt, the pollution of dust, its durability is improved, the load that withstands shocks is played a part of again.
7. hydraulic pressure component buffer unit according to claim 6, it is characterised in that：Steam vent (15) is provided with the dust-proof cylinder body (14).
8. hydraulic pressure component buffer unit according to claim 1 and 2, it is characterised in that：Protection piston rod is provided with outside the piston rod for connecting the first mounting ear (20) and pollutes dirt-proof boot (19) from dirt, dust.
9. hydraulic pressure component buffer unit according to claim 8, it is characterised in that：The dirt-proof boot (19) is scalable corrugated rubber set.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510770223.0A CN106702882A (en) | 2015-11-12 | 2015-11-12 | Hydraulic force distribution buffering device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510770223.0A CN106702882A (en) | 2015-11-12 | 2015-11-12 | Hydraulic force distribution buffering device |
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| CN106702882A true CN106702882A (en) | 2017-05-24 |
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| CN201510770223.0A Pending CN106702882A (en) | 2015-11-12 | 2015-11-12 | Hydraulic force distribution buffering device |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107191643A (en) * | 2017-06-22 | 2017-09-22 | 苏州诺纳可电子科技有限公司 | A kind of stable-pressure device easy to install |
| CN107191642A (en) * | 2017-06-22 | 2017-09-22 | 苏州诺纳可电子科技有限公司 | The slow pressure equipment of one kind |
| CN107972691A (en) * | 2017-11-21 | 2018-05-01 | 四川辉冠金属材料有限公司 | Mine car buffer coupling |
| CN111305041A (en) * | 2020-02-28 | 2020-06-19 | 江苏大学 | Multistage anti-impact energy-consumption bridge limiter |
| CN111335140A (en) * | 2020-04-13 | 2020-06-26 | 中铁二院工程集团有限责任公司 | Arch structure damping device and method for deck type concrete arch bridge |
| CN111424532A (en) * | 2020-05-06 | 2020-07-17 | 北方工业大学 | Novel precast beam roof beam connected node |
| CN111910505A (en) * | 2020-09-22 | 2020-11-10 | 中国地震局工程力学研究所 | Penetration type multistage energy consumption bridge anti-collision stop block |
| CN111996925A (en) * | 2020-08-18 | 2020-11-27 | 赵德新 | Bridge reinforcing system capable of reducing bridge deck vibration |
| CN113585285A (en) * | 2021-08-24 | 2021-11-02 | 中国地质大学（武汉） | Device for eliminating influence of lattice column on axial force of support beam and mounting method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111305041B (en) * | 2020-02-28 | 2021-10-12 | 江苏大学 | Multistage anti-impact energy-consumption bridge limiter |
| CN111335140A (en) * | 2020-04-13 | 2020-06-26 | 中铁二院工程集团有限责任公司 | Arch structure damping device and method for deck type concrete arch bridge |
| CN111424532A (en) * | 2020-05-06 | 2020-07-17 | 北方工业大学 | Novel precast beam roof beam connected node |
| CN111424532B (en) * | 2020-05-06 | 2021-08-03 | 北方工业大学 | Precast beam roof beam connected node |
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| CN111910505A (en) * | 2020-09-22 | 2020-11-10 | 中国地震局工程力学研究所 | Penetration type multistage energy consumption bridge anti-collision stop block |
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Application publication date: 20170524 |