CN106149550A - Roll spherical bearing - Google Patents
Roll spherical bearing Download PDFInfo
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- CN106149550A CN106149550A CN201610730450.5A CN201610730450A CN106149550A CN 106149550 A CN106149550 A CN 106149550A CN 201610730450 A CN201610730450 A CN 201610730450A CN 106149550 A CN106149550 A CN 106149550A
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- Prior art keywords
- ball
- raceway
- plate
- socket
- spherical bearing
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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
- E01D19/04—Bearings; Hinges
- E01D19/042—Mechanical bearings
- E01D19/046—Spherical bearings
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
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Abstract
The invention discloses a kind of rolling spherical bearing, it is provided with the lower support plate of ball-and-socket including upper end, is installed in the spherical crown liner plate that upper surface is plane of ball-and-socket, is matched with the wearing plate assembly of described plane, and it being supported in the upper bracket plate on described wearing plate assembly, described ball-and-socket surface is provided with the raceway of a plurality of annular with ball-and-socket axis as axis；The ball for supporting spherical crown liner plate it is provided with, to provide the rolling friction between ball-and-socket and spherical crown liner plate in raceway.The foundation present invention is rolling friction by reasonably selecting friction type, improves the friction environment under fully loaded transportation condition.
Description
Technical field
The present invention relates to a kind of bridge pad, specifically spherical bearing for bridge.
Background technology
Bridge pad has polytype, such as spherical bearing, laminated rubber bearing, pot rubber bearing etc., bridge pad
Effect mainly have 2 points, bridge load (dynamic load and static load) is effectively passed to bridge pier by the first, and second it be to overcome
Beam body is because of by brake force, ambient temperature, concrete shrinkage or creep and beam body that displacement that load effect etc. causes produces is inclined
Pressure.Such as horizontal at pontic, if because ambient temperature changes, cause the beam body length of side, and the spacing between pier stud is constant, if
Being the connection of rigidity between beam body and pier stud, the most rigidly connected part likely can be cut off or coupling part is produced by beam body
The biggest raw shearing force.Bridge pad then makes beam body malleation as far as possible on pier stud.
Because the attachment structure between bridge and pier stud not only needs the displacement in the face of horizontal direction, also can be because vertically compressing change
Shape or different piece amplitude of deformation are inconsistent and produce corner deformation, thereby produce not only to meet and adapt to movement and deformation but also adapt to
The rolling spherical bearing of rotational deformation.
Bridge pad needs to carry huge load, therefore it provides the mobile composition surface in the bridge pad of adaptive deformation
It is extremely important whether (adapting to straight-line displacement or angular displacement) is in good working order, and the coefficient of friction i.e. moving composition surface should
Smaller.Owing to bridge pad is applied to heavy duty occasion, suffering from this, the rubbing surface of commonly used of bridge pad contact is joined
Closing, spherical bearing is no exception.In order to ensure that bridge pad realizes normal duty, at present frequently with measure be to ensure that
The tetrafluoro plate surface of the sliding bearing in the surface cleaning of rubbing surface, such as mobile model bearing and the stainless steel surfaces rubbed therewith
Cleaning.And impose lubricant at friction engageable surface, such as 5201-2 silicone grease lubricating oil.But, nonetheless, friction engageable surface
Coefficient of friction is the biggest, poor to the responding ability of deformation.
Typically, turning spherical bearing as Chinese patent literature CN101476284B discloses one, this bearing provides
Three friction wearing plates, and a sphere rubbing surface formed by spherical supports and sphere cavity, all of rubbing surface are provided
Being all sliding friction, coefficient of friction is relatively large.
And Chinese patent literature CN105064205A discloses a kind of spherical bearing, its description the 48th section is pointed out, passes through
The function arranging sliding seat rotation and slip to realize spherical bearing between upper bracket with undersetting separates, and can avoid bearing
Local function function overlapping causes stuck stress to concentrate, slip ring when can to overcome friction environment to a certain extent be sliding friction
The problem that border is severe, but can not fundamentally solve the condition that rubbing surface is sliding friction.
Summary of the invention
In view of this, it is an object of the invention to, it is provided that a kind of rotation spherical bearing, by reasonably selecting friction type
For rolling friction, improve the friction environment under fully loaded transportation condition.
The present invention is by the following technical solutions:
A kind of rolling spherical bearing, is provided with the lower support plate of ball-and-socket including upper end, is installed in the ball that upper surface is plane of ball-and-socket
Hat liner plate, it is matched with the wearing plate assembly of described plane, and is supported in the upper bracket plate on described wearing plate assembly, described ball
Nest surface is provided with the raceway of a plurality of annular with ball-and-socket axis as axis；
The ball for supporting spherical crown liner plate it is provided with, to provide the rolling friction between ball-and-socket and spherical crown liner plate in raceway.
Above-mentioned rolling spherical bearing, alternatively, described raceway at least 3.
Alternatively, described raceway has 4.
Alternatively, the degree of depth of the raceway that the depth ratio radius of the raceway that radius is little is big is little；
Correspondingly, the raceway that the degree of depth is little installs the ball that sphere diameter is little.
Alternatively, it is arithmetic progression by the degree of depth of the raceway of raceway radius arrangement, and raceway minimum-depth is 2.5mm.
Alternatively, the minimum diameter of ball is 8mm, and in the raceway of minimum-depth, the raceway that the degree of depth sequentially increases
Use the ball that diameter is relatively large.
Alternatively, ball the second minor diameter is 10mm, and the ball diameter the most sequentially increased increases successively according to arithmetic progression
Greatly.
Alternatively, it is provided with the hydraulic fluid port into the space filling lubricant medium between ball-and-socket and spherical crown liner plate；
Or the space filling between ball-and-socket and spherical crown liner plate has lubricant medium.
Alternatively, around need between ball-and-socket and spherical crown liner plate lubrication space, be provided with the lower seal rubber ring sealed.
Alternatively, described wearing plate assembly includes stacked wearing plate on the plane, and is stacked on wearing plate
Corrosion resistant plate；
Correspondingly, described plane is provided with groove, with the described wearing plate of receiving of part in the vertical direction；
It is provided with sealing rubber ring in the periphery of corrosion resistant plate；
Upper rubber seal and lower rubber seal form primary seal structure, at the peripheral upper bracket plate of primary seal structure
And it is provided with the secondary seal structure formed by dust-proof coaming plate between lower support plate.
According to the present invention, change sliding friction is rolling friction, mainly uses multiple being provided with between spherical crown liner plate and ball-and-socket
The raceway of ball, while satisfied acquisition rolling friction, makes full use of spherical crown liner plate bigger with the area of ball-and-socket involutory surface
Feature, arranges more raceway, thus meets heavy duty requirement, thus effectively improve the friction environment under the conditions of focusing on.
Accompanying drawing explanation
Fig. 1 is partly to cut open structural representation along bridge to longitudinally-moving spherical bearing in an embodiment.
Fig. 2 is that in an embodiment, direction across bridge longitudinally-moving spherical bearing partly cuts open structural representation.
Fig. 3 is that in an embodiment, the laterally movable spherical bearing of direction across bridge partly cuts open structural representation.
Fig. 4 is partly to cut open structural representation along bridge to laterally movable spherical bearing in an embodiment.
Fig. 5 is to fix spherical bearing in an embodiment partly to cut open structural representation.
Fig. 6 is partly to cut open structural representation along bridge to multidirectional movable spherical bearing in an embodiment.
Fig. 7 is that in an embodiment, the multidirectional movable spherical bearing of direction across bridge partly cuts open structural representation.
In figure: 1. lower seal rubber ring, 2. go up sealing rubber ring, 3. spherical crown liner plate, 4. plane polyfluortetraethylene plate, the most not
Rust steel plate, 6. upper bracket plate, 7. go up anchor bolt, 8. plays anchor bolt, 9. lower support plate, 10. ball-and-socket, 11. balls, and 12. prevent
Dirt coaming plate.
Detailed description of the invention
Spherical crown refers to that sphere is cut rear remaining curved surface by a plane, and the disc intercepted is the end, is perpendicular to the straight of disc
The part that footpath is intercepted is high.Spherical crown originally refers to the structure that the aforesaid end surrounds, ball as shown in Figure 1 with corresponding curved surface
Hat liner plate 3 substantially belongs to segment, but its title has no effect on the understanding of its structure.
And well known, a lot of structures in mechanical field the structure on the geometric meaning of non-critical, but generally use
Concept on geometric meaning describes the structure in mechanical field.Spherical crown liner plate 3 shown in Fig. 1, periphery one annular of excision
Part.
About the axis of spherical crown liner plate 3, the personnel by this area and pure field of science are understood, for spherical crown, and ball
The bottom surface of hat is crossed the normal at center and is the axis of spherical crown.
In Fig. 1-7, spherical crown liner plate 3 is up-down structure, its bottom surface upper, spherical crown surface under, therefore, reason represented in figure
In the up-down structure thought, its axis is above-below direction.
Should be appreciated that the impact relating to the factors such as rolling, actual when support beam, the axis of spherical crown liner plate 3 is also simultaneously
Not necessarily it is in strict above-below direction.
Owing to the main improvement of the present invention is at spherical crown liner plate 2 and the involutory surface of ball-and-socket 10, and the distribution form of ball
On, therefore, the structure conventional for spherical bearing is seldom described, such as upper anchor bolt 7 set on upper bracket plate 6,
The lower anchor bolt 8 arranged in lower support plate 9, belongs to the design of routine.
And for different classes of spherical bearing involved in Fig. 1 to Fig. 7, it will be appreciated that based on aforesaid improvement,
It is readily apparent that can be general in this seven classes spherical bearing.
Different types of spherical bearing, it differs primarily in that constraint to upper bracket plate 6DOF, as it is shown in figure 1,
Fig. 1 is for partly cuing open structural representation along bridge to longitudinally-moving spherical bearing, in addition to along bridge to longitudinal direction and ball-and-socket 10 and spherical crown liner plate 3
The degree of freedom of upper bracket plate 6 is restrained, and at this, no longer constraint type and structure to all kinds of spherical bearings repeats.
Illustrating with the rolling spherical bearing illustrated in Figure of description 1 below, the basal body structure in figure mainly has two
Individual part, first lower support plate 9, another is upper bracket plate 6, and its template part is typically rectangular slab or square plate.
The most as shown in the lower part of Figure 1, the upper surface of lower support plate 9 is formed with a boss, and boss processes ball-and-socket 10, generally
The curvature of ball-and-socket 10 is identical with the curvature of spherical crown liner plate 3, to obtain good face, face joint, in the present invention, ball-and-socket 10 and ball
The curvature of hat liner plate 3 can be the same or different, if identical, because of the relation of fit on, ball-and-socket more than 10 spherical crown liner plate 3 is involutory
Gap everywhere, face can be variant.If curvature is inconsistent, then based on similarity relation, between ball-and-socket 10 and spherical crown liner plate 3 between
Gap can be consistent.
About spherical crown liner plate 3, in a preferred embodiment, use steel or politef, be installed in ball-and-socket 10, its
Upper surface is plane, i.e. its bottom surface is plane, meets the general definition of spherical crown.
Spherical crown liner plate 3 can not produce straight-line displacement, but is used for providing angular displacement, for meeting the straight line position of upper bracket plate 6
Move, in addition to spherical crown liner plate 3 is with the first friction structure of ball-and-socket 10, between spherical crown liner plate more than 3 upper bracket plate 6, there is the second friction knot
Structure, the second friction structure is realized by wearing plate assembly, plane polyfluortetraethylene plate 4 as shown in Figure 1 and corrosion resistant plate 5
Stacked structure.
About the first friction structure, to reduce its coefficient of friction as purport.Those skilled in the art is apparently, it appears that the
One friction structure can use rolling friction to replace sliding friction, then the second friction structure can also be such, but, inventor
Think, the first friction structure faced by situation more complicated, and angular displacement is smaller, and its corresponding stiction is bigger,
When angular displacement is smaller, relative slip, when stiction is bigger, can produce the most small lying prone, or never
Produce relative motion.
As shown shown in 1-7, the surface of ball-and-socket 10 is provided with the position in a plurality of raceway, i.e. figure indicated by steel ball.Actual
The annular array being the steel ball axis with spherical crown liner plate 3 as axle center is divided in support part, it follows that the plane of each annular array is phase
The most parallel, and the axis of spherical crown liner plate 3 the most is axle.Replace annular array with rolling structure directly below and carry this annular
The raceway of array is used for stating rolling friction structure.So rolling structure has multiple such that it is able to form stronger support energy
Power, meets the application under fully loaded transportation condition.
And rolling friction is relative to sliding friction, not only coefficient of friction is greatly reduced, and owing to rolling structure can carry
For bigger gap, such that it is able to the beneficially filling of the lubricant such as lubricating oil, grease and holding.
Fig. 1-7 uses steel ball as ball 11, it is obvious that steel ball is a kind of modal ball, but machinery neck
The ball that can select in territory is more, the vitreous body ball that such as alloy steel ball, hardness ratio are higher, or other kinds of alloy
Ball.
Ball is laid in raceway, not necessarily uniform array, as between bicycle pedal axle and frame bearing blocks hole
Ball lay, belong to the ball laying structure without retainer.
It is readily apparent that under conditions of the satisfied laying structure of ball without retainer, also meet and use retainer to carry out
The structure that ball is laid.
When using retainer to carry out ball laying, ball array way in raceway can be controlled, and can reliably keep.
Thereby structure, ball-and-socket 10 is configured to rolling friction to the friction between spherical crown liner plate 3 based on the first friction structure, and
Rolling structure has multiple, and the barycenter of multiple rolling structure is substantially distributed on the axis of spherical crown liner plate 3, it is possible to formed good
Supporting role.
Additionally, at mechanical field in order to improve the weight bearing power of such as deep groove ball bearing, develop a kind of biserial deep-groove ball
Bearing, and carry out the distribution design of angular contact, structure is complicated, and can only lay two row, and bearing otherwise can be caused wide.
And in the present embodiment, have enough spaces, lay multiple row (the most multiple rolling structure), thus there is higher lotus
Loading capability, meet coefficient of friction less under conditions of, it is also possible to meet the technical conditions of heavy-duty applications.
About the bar number of raceway, should not be less than 3, i.e. raceway at least 3, with the weight bearing power that offer is higher.
About the distribution between raceway, can be distributed in the way of waiting circular arc in the radian direction of ball-and-socket 10.
In some embodiments it is contemplated that the power that ball 11 the most on the lower can carry, the downward proportion shared by component is more
Greatly, therefore, the raceway density bottom ball-and-socket 10 can be relatively large, and the most up distribution density is the least.
The bar number of raceway is unsuitable too much no more than 5, too much can slacken the bulk strength of ball-and-socket 10, additionally, at geometry
On, the most ideally, the ball 11 on different raceways should be tangent with spherical crown liner plate 3, and raceway bar number is too much, can be added to
Design difficulty produced by this, and under fully loaded transportation condition, different raceway pressure experienced may be different, and cause on different raceway
Difference during the inefficacy of ball 11, maintainability can decline to a great extent.
To sum up structure, and relevant experiment, determine that raceway manufactures and designs difficulty when having 4 less big and maintainable
In expected scope.
Further, in preferred embodiment, the degree of depth of the raceway that the depth ratio radius of the raceway that radius is little is big is little；This
The most foregoing ring with ball-and-socket 10 axis as axle center of the raceway radius at place.
Correspondingly, the raceway installing little ball 11 of sphere diameter that the degree of depth is little, from figure 1 it appears that axial at ball-and-socket, position
Ball 11 in lower section is less than sphere diameter above.
Based on raceway and the reasonable disposition of ball 11, can effective distractive load, improve the weight bearing power of rotational structure.
Preferably, for convenience of design, and improve overall maintainability, by the degree of depth of the raceway of raceway radius arrangement be
Difference series, and raceway minimum-depth is 2.5mm, under conditions of the placement of ball 11 part is such as raceway, some highlights out
Come, based on the deformation under loading condition, it is provided that sufficiently large supporting surface.
Should be appreciated that ideally, ball 11 should be a little to the support of spherical crown liner plate 3, but actually needs to consider
Ball 11 and the deformation of spherical crown liner plate 3, the supporting construction of essence is face.
The spherical bearing of bridge is applied to heavy duty occasion after all, and therefore, ball 11 is unsuitable too small, and its minimum diameter is 8mm,
There is bigger weight bearing power.Minimum ball 11 is in the raceway of minimum-depth, and the raceway that the degree of depth sequentially increases uses
The ball 11 that diameter is relatively large.
Ball 11 second minor diameter is 10mm, and ball 11 diameter the most sequentially increased increases successively according to arithmetic progression.
According to 4 raceways, the ball diameter the most sequentially used is 8mm, 10mm, 15mm, 20mm.Same raceway
On the distance (centre-to-centre spacing) of ball 11 be also required to make consideration, from interior put in place be sequentially 13.5mm, 15.5mm, 25.5mm,
30.5mm。
By the ball 11 in above-mentioned configuration, raceway and raceway by reasonable layout, realizing change sliding friction into rolling
On the basis of friction, there is the weight bearing power that comparison is high.
Point out in the preceding article, support based on ball 11, it is possible to form coordinating between ball-and-socket 10 surface and spherical crown liner plate 3
Gap, is therefore beneficial to lubrication, on this basis, it is provided that following structure:
Being provided with the hydraulic fluid port filling lubricant medium for the space between ball-and-socket 10 and spherical crown liner plate 3, on the one hand lubricant medium can enter one
The reduction coefficient of friction of step, on the other hand, lubricant medium is general is oil substances mostly, it is possible to shape on such as steel ball class ball
Become oil film, there is corrosion-resisting function.
For the lubricant of other classifications, such as graphite, even if corrosion-resisting function is limited, but it is solid granular
Lubricant, chemical stability is good, to a certain extent can be non-maintaining.
Therefore, needing the hydraulic fluid port arranging filling lubricant medium for it in some embodiments, some then belongs to non-maintaining knot
Structure, i.e. need not arrange and add pouring orifice, enclose a certain amount of lubricant in advance.
For enclosing the structure of a certain amount of lubricant in advance, it is lower to sealing requirements, and some structure is complete
By labyrinth seal or seal by sealing, for needing in the application of filling, higher to seal request, especially, for
Needing the application of filling, lubricant mobility is higher, needs the most higher sealing grade.
In some embodiments, around need between ball-and-socket 10 and spherical crown liner plate 3 lubrication space, be provided with to seal down
Sealing rubber ring 1, on the one hand reduces the entrance of on-the-spot dust, on the other hand, reduces the entrance of gas, reduce the old of lubricant medium
Changing speed, especially oils (lubricating oil or grease), belongs to organic lubricant mostly, the most aging.
Include stacked wearing plate on the plane about described wearing plate assembly, and be stacked on wearing plate not
Rust steel plate 5.
In addition corresponding, described plane is provided with groove, with the described wearing plate of receiving of part in the vertical direction, plays
The effect of fixing wearing plate.
And then, it is provided with sealing rubber ring 2 in the periphery of corrosion resistant plate 5, to provide the sealing of the second friction structure, makes
Two friction structures keep good frictional behaviour.
Further, in order to improve sealability, upper rubber seal 2 and lower rubber seal 1 form primary seal knot
Structure, is provided with, between the peripheral upper bracket plate 6 and lower support plate 9 of primary seal structure, the secondary seal formed by dust-proof coaming plate 12
Structure.
Claims (10)
1. roll a spherical bearing, be provided with the lower support plate (9) of ball-and-socket (10) including upper end, be installed in the upper table of ball-and-socket (10)
Face is the spherical crown liner plate (3) of plane, is matched with the wearing plate assembly of described plane, and is supported on described wearing plate assembly
Upper bracket plate (6), it is characterised in that described ball-and-socket (10) surface is provided with the raceway of a plurality of annular with ball-and-socket axis as axis；
The ball (11) for supporting spherical crown liner plate (3) it is provided with, to provide the rolling between ball-and-socket (10) and spherical crown liner plate in raceway
Friction.
Rolling spherical bearing the most according to claim 1, it is characterised in that described raceway at least 3.
Rolling spherical bearing the most according to claim 2, it is characterised in that described raceway has 4.
4. according to the arbitrary described rolling spherical bearing of claim 1-3, it is characterised in that the depth ratio of the raceway that radius is little half
The degree of depth of the raceway that footpath is big is little；
Correspondingly, the raceway that the degree of depth is little installs the ball (11) that sphere diameter is little.
Rolling spherical bearing the most according to claim 4, it is characterised in that be by the degree of depth of the raceway of raceway radius arrangement
Arithmetic progression, and raceway minimum-depth is 2.5mm.
Rolling spherical bearing the most according to claim 5, it is characterised in that the minimum diameter of ball (11) is 8mm, and uses
In the raceway of minimum-depth, the raceway that the degree of depth sequentially increases uses the ball (11) that diameter is relatively large.
Rolling spherical bearing the most according to claim 6, it is characterised in that ball (11) second minor diameter is 10mm, its
After ball (11) diameter that sequentially increases increase successively according to arithmetic progression.
8. according to the arbitrary described rolling spherical bearing of claim 1-3, it is characterised in that be provided with and serve as a contrast with spherical crown into ball-and-socket (10)
The hydraulic fluid port of the space filling lubricant medium between plate (3)；
Or the space filling between ball-and-socket (10) and spherical crown liner plate (3) has lubricant medium.
Rolling spherical bearing the most according to claim 8, it is characterised in that need around between ball-and-socket and spherical crown liner plate (3)
The space of lubrication, is provided with the lower seal rubber ring (1) sealed.
Rolling spherical bearing the most according to claim 9, it is characterised in that described wearing plate assembly includes being stacked in institute
State the wearing plate in plane, and the corrosion resistant plate (5) being stacked on wearing plate；
Correspondingly, described plane is provided with groove, with the described wearing plate of receiving of part in the vertical direction；
It is provided with upper sealing rubber ring (2) in the periphery of corrosion resistant plate (5)；
Upper rubber seal (2) and lower rubber seal (1) form primary seal structure, peripheral upper in primary seal structure
The secondary seal structure formed by dust-proof coaming plate (12) it is provided with between support plate (6) and lower support plate (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610730450.5A CN106149550A (en) | 2016-08-26 | 2016-08-26 | Roll spherical bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610730450.5A CN106149550A (en) | 2016-08-26 | 2016-08-26 | Roll spherical bearing |
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| Publication Number | Publication Date |
|---|---|
| CN106149550A true CN106149550A (en) | 2016-11-23 |
Family
ID=57343315
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610730450.5A Pending CN106149550A (en) | 2016-08-26 | 2016-08-26 | Roll spherical bearing |
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| CN107044084A (en) * | 2017-06-14 | 2017-08-15 | 西南交通大学 | A kind of two direction two-stage displacement-limited with dissipation block spherical bearing |
| CN107338723A (en) * | 2017-09-04 | 2017-11-10 | 山东龙祥新材料科技有限公司 | Tension and compression spherical bearing |
| CN108049307A (en) * | 2017-12-08 | 2018-05-18 | 丰泽工程橡胶科技开发股份有限公司 | Combined intelligent ball-type Dynamometric support system |
| CN109898411A (en) * | 2019-04-04 | 2019-06-18 | 北京建筑大学 | A kind of spin support |
| CN111663436A (en) * | 2020-07-07 | 2020-09-15 | 山东交通学院 | Cylindrical surface support |
| CN113833143A (en) * | 2021-08-20 | 2021-12-24 | 广东省建筑设计研究院有限公司 | Anti-locking one-way sliding damping hinged support |
| CN113931059A (en) * | 2021-10-14 | 2022-01-14 | 中国建筑一局(集团)有限公司 | Large-span V-shaped bridge pier top rotating structure and construction method |
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| CN111663436B (en) * | 2020-07-07 | 2021-12-28 | 山东交通学院 | Cylindrical surface support |
| CN113833143A (en) * | 2021-08-20 | 2021-12-24 | 广东省建筑设计研究院有限公司 | Anti-locking one-way sliding damping hinged support |
| CN113931059A (en) * | 2021-10-14 | 2022-01-14 | 中国建筑一局(集团)有限公司 | Large-span V-shaped bridge pier top rotating structure and construction method |
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Address after: Central nanxinzhuang road Ji'nan Shandong province 250022 city University of Jinan No. 336 Applicant after: University of Jinan Applicant after: Shandong Longxiang new Mstar Technology Ltd Address before: Central nanxinzhuang road Ji'nan Shandong province 250022 city University of Jinan No. 336 Applicant before: University of Jinan Applicant before: Shanghai Longxiang Rubber & Plastic Products Co., Ltd. |
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