CN212670267U - Wind-resistant spherical support capable of being fused in limited force mode - Google Patents
Wind-resistant spherical support capable of being fused in limited force mode Download PDFInfo
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- CN212670267U CN212670267U CN202020697115.1U CN202020697115U CN212670267U CN 212670267 U CN212670267 U CN 212670267U CN 202020697115 U CN202020697115 U CN 202020697115U CN 212670267 U CN212670267 U CN 212670267U
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Abstract
The utility model discloses a force-limiting fusing wind-resistant spherical support, which comprises a sliding plate (1), a spherical crown (4), a lower support plate (6) and a base (9); the spherical crown (4) is arranged between the sliding plate (1) and the lower support plate (6) and is in sliding connection with the sliding plate (1) to form a plane friction pair, the spherical crown (4) and the lower support plate (6) are connected through the stud (13) to form a spherical friction pair together, the lower support plate (6) is fixedly connected with the base (9) through a fusing mechanism, a pressing plate (10) is arranged between the lower support plate (6) and the base (9), and the transverse force exceeds a threshold value and is automatically cut off under the working condition that the transverse force exceeds the threshold value, so that the fusing mechanism is limited by the pressing plate (10) to form the spherical friction pair, and the support structure is guaranteed not to fail. The utility model discloses avoided the roof beam body to lead to the structural damage because of transverse load is too big, damaged bridge structures, effectively guaranteed the structural safety of the roof beam body.
Description
Technical Field
The utility model belongs to the technical field of the bridge beam supports, more specifically relates to a limit for strength fusing anti-wind ball-type support.
Background
With the demand of national economy development, a batch of large-span and large-bearing-capacity cable-stayed bridges and suspension bridges are designed and built successively. And wind-resistant supports are vertically arranged between the inner side surfaces of the tower bodies and the outer side surfaces of the beam bodies of the cable-stayed bridges and the suspension bridges, and are respectively connected with the tower bodies and the beam bodies in an anchoring manner. The wind-resistant support can limit the large-distance swing of the transverse bridge of the beam body caused by wind power or earthquake force, bear the transverse horizontal force transmitted by the beam body, and simultaneously can meet the requirements of longitudinal bridge displacement, vertical bridge displacement and all-directional corner of the beam body.
The traditional transverse wind-resistant support can resist transverse wind load under the normal working condition, limit the transverse bridge displacement of the beam body caused by wind power, bear the transverse horizontal force transmitted by the beam body, and simultaneously can meet the requirements of longitudinal bridge displacement and vertical bridge displacement of the beam body and the rotation of the beam body in all directions. However, under the action of earthquake, the transverse horizontal force is increased sharply, the transverse earthquake force is directly transmitted to the beam body structure through the transverse wind-resistant support, the beam body is damaged or even the structure is damaged due to the increase of the transverse earthquake force, and the safety and the service life of the bridge structure are influenced.
SUMMERY OF THE UTILITY MODEL
To the above defect or the improvement demand of prior art, the utility model provides a limit power fusing anti-wind ball-type support has horizontal fusing function, and the fusing structure in the anti-wind ball-type support is cut when horizontal bearing capacity has reached the limit value of design, removes horizontal restraint and has released horizontal power, and horizontal power can't be transmitted for the roof beam body, has avoided the roof beam body to lead to the structural damage because of horizontal load is too big, damages bridge structures, effectively guarantees the structural safety of the roof beam body.
In order to achieve the purpose, the utility model provides a wind-resistant spherical support with force-limiting fusing, which comprises a sliding plate, a spherical crown, a lower support plate and a base; wherein,
the base is fixedly connected with the beam body, and the sliding plate is fixedly connected with the bridge tower;
the spherical crown is arranged between the sliding plate and the lower support plate and is in sliding connection with the sliding plate to form a plane friction pair, so that the beam body is ensured to be relatively displaced with the bridge tower along the bridge direction or the vertical direction, and the transverse displacement of the beam body is limited under the working condition that the transverse force is smaller than a threshold value;
the spherical crown and the lower support plate are connected through a stud to jointly form a spherical friction pair, so that the lower support plate is kept still, and the spherical crown can rotate in any direction;
the lower support plate is fixedly connected with the base through a fusing mechanism, a pressing plate is arranged between the lower support plate and the base, the fusing mechanism is automatically cut off under the condition that the transverse force exceeds a threshold value, and the spherical friction pair is limited through the pressing plate, so that the support structure is guaranteed against failure.
Furthermore, the fusing mechanism comprises a shear pin, the base is provided with a supporting plate, a shear pin hole is formed in the supporting plate, and the shear pin is fixedly connected with the lower support plate through the shear pin hole.
Furthermore, threaded holes are formed in the centers of the spherical crown, the lower support plate and the pressing plate, and the stud penetrates through the threaded holes and is locked and fixed through nuts.
Furthermore, a stainless steel plate is arranged on one side, close to the spherical crown, of the sliding plate, a plane is arranged on one side of the spherical crown, a groove is formed in the plane, a plane wear-resisting plate is arranged in the groove, and the plane wear-resisting plate and the stainless steel plate are matched to form a plane friction pair.
Furthermore, the periphery of one side of the plane of the spherical crown is provided with a first annular groove, and a sealing ring is arranged in the first annular groove.
Furthermore, one side of the lower support plate, which is close to the spherical crown, is provided with a concave spherical surface with the same spherical radius as that of the spherical crown, the spherical surface of the spherical crown is sleeved in the concave spherical surface of the lower support plate, and a first spherical wear-resisting plate is arranged between the spherical surface and the concave spherical surface to form a spherical friction pair.
Furthermore, a second annular groove is formed in the periphery of the concave spherical surface of the lower support plate, and a sealing ring is arranged in the second annular groove.
Furthermore, one side, far away from the spherical crown, of the lower support plate is provided with a notch, the bottom of the notch is a convex spherical surface, one side of the pressing plate is a concave spherical surface, the radius of the concave spherical surface of the lower support plate is the same, and a second spherical wear-resisting plate is arranged between the concave spherical surface of the pressing plate and the convex spherical surface of the lower support plate.
Furthermore, the two sides of one end, far away from the beam body, of the base are provided with cover plates, one end of each cover plate is provided with an inner boss facing the center of the base, two sides of one side, close to the notch, of the seat plate are provided with outer bosses, and the outer bosses and the inner bosses are in lap joint to form a buckle structure.
Generally, through the utility model discloses above technical scheme who conceives compares with prior art, can gain following beneficial effect:
1. the utility model discloses a wind-resistant ball-type support has horizontal fusing function, and the fusing structure in the wind-resistant ball-type support is cut when horizontal bearing capacity has reached the limit value of design, removes horizontal restraint and has released horizontal power, and horizontal power can't be transmitted for the roof beam body, has avoided the roof beam body to lead to the structural damage because of horizontal load is too big, damages bridge structures, effectively guarantees the structural safety of the roof beam body.
2. The utility model discloses an anti-wind ball-type support adopts the connected mode of nut and screw to play the effect of rotating the round pin axle for spherical crown and undersetting board can rotate relatively, have satisfied the rotation function of limit force fusing anti-wind ball-type support, can also prevent droing of spherical crown in the installation.
3. The utility model discloses a wind-resistant ball-type support sets up the second sphere antifriction plate between the convex sphere of clamp plate concave spherical surface and bottom suspension bedplate's notch, forms the sphere friction pair, can guarantee the rotation function of spherical crown in the arbitrary direction under the circumstances that bottom suspension bedplate keeps motionless to realize the rotation of the arbitrary direction of the roof beam body.
4. The utility model discloses a wind-resistant ball-type support is connected with the clamp plate through the double-screw bolt, has eliminated the bending stress of double-screw bolt, decomposes into the pulling force and the shearing force of double-screw bolt with the bending stress of double-screw bolt, has avoided the whole processing degree of difficulty of traditional rotation round pin axle, has effectively avoided the concentration of stress.
5. The utility model discloses a wind-resistant ball type support, the sphere suit of spherical crown is in the concave sphere of bottom suspension bedplate to set up first sphere antifriction plate between sphere and concave sphere, form the spherical friction pair, can guarantee that the spherical crown rotates the function in arbitrary direction, thereby realize the rotation of the arbitrary direction of the roof beam body.
6. The utility model discloses a wind-resistant ball-type support, the cooperation of the corrosion resistant plate on plane antifriction plate and the sliding plate forms plane friction pair for the sliding plate can freely slide on this plane, thereby realizes the vertical bridge of the roof beam body to and indulge the bridge to removing.
Drawings
FIG. 1 is a schematic diagram of a bridge structure with a force-limiting fusing wind-resistant spherical bearing according to an embodiment of the present invention;
FIG. 2 is an installation diagram of a force-limiting fusing wind-resistant spherical support in the embodiment of the present invention;
FIG. 3 is a schematic structural view of a fusing wind-resistant spherical support in an embodiment of the present invention;
fig. 4 is a schematic view of the fastening structure in the embodiment of the present invention;
FIG. 5 is an enlarged schematic view of portion A of FIG. 3;
FIG. 6 is an enlarged schematic view of portion B of FIG. 4;
FIG. 7 is a schematic view of the installation position of the pressing plate in the embodiment of the present invention;
fig. 8 is a schematic view of the installation position of the set screw in the embodiment of the present invention.
In all the figures, the same reference numerals denote the same features, in particular: 1-sliding plate, 2-plane wear-resisting plate, 3-sealing ring, 4-spherical crown, 41-groove, 42-first annular groove, 5-first spherical wear-resisting plate, 6-lower support plate, 61-notch, 62-second annular groove, 7-shear pin, 8-support plate, 9-base, 10-pressing plate, 11-second spherical wear-resisting plate, 12-nut, 13-stud, 14-cover plate, 15, bolt, 16-anchorage steel bar and 17-set screw; 18-beam body, 19-bridge tower, 20-stainless steel plate, 21-buckle structure, 211-inner boss, 212-outer boss, 22-bridge deck, 23-vertical support and 24-wind-resistant support.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention. Furthermore, the technical features mentioned in the embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.
As shown in fig. 1 and fig. 2, the utility model discloses a limit force fusing anti-wind ball type support is used for connecting pylon 19 and roof beam body 18, including sliding plate 1, spherical crown 4, lower support plate 6 and base 9. The spherical crown 4 is installed between the sliding plate 1 and the lower support plate 6, the spherical crown 4 is connected with the sliding plate 1 in a sliding mode, the spherical crown 4 is connected with the lower support plate 6 in a rotating mode, the lower support plate 6 is fixedly connected with the base 9 through the shear pin 7, the sliding plate 1 is fixedly connected with the bridge tower 19, and the base 9 is fixedly connected with the beam body 18. The wind-resistant spherical bearing with the force-limiting fusing function has the transverse fusing function, when the transverse bearing capacity reaches the designed limit, the fusing structure in the wind-resistant spherical bearing is cut off, transverse constraint is removed, transverse force is released, the transverse force cannot be transmitted to the beam body 18, the structural damage caused by overlarge transverse load of the beam body 18 is avoided, the bridge structure is damaged, and the structural safety of the beam body 18 is effectively guaranteed.
As shown in fig. 3 and 5, a stainless steel plate 20 is welded on one side of the sliding plate 1 close to the spherical crown 4, one side of the spherical crown 4 is a plane, the other side of the spherical crown 4 is a spherical surface, a groove 41 is formed on the plane side of the spherical crown 4, a plane wear-resistant plate 2 is fixed in the groove 41 through a copper screw, and the plane wear-resistant plate 2 is matched with the stainless steel plate 20 on the sliding plate 1 to form a plane friction pair, so that the sliding plate 1 can freely slide on the plane, and the beam body 18 can rotate in any direction. The outer ring of the plane side of the spherical crown 4 is provided with a first annular groove 42, the first annular groove 42 is internally provided with a sealing ring 3, the sealing ring 3 is positioned on the outer ring of the plane wear-resisting plate 2, and the sealing ring 3 has dustproof and waterproof effects on the plane wear-resisting plate 2.
As shown in fig. 2, an anchorage steel bar 16 is fixed on one side of the sliding plate 1 away from the spherical crown 4, the sliding plate 1 is anchored with the tower body through the anchorage steel bar 16, and the force-limiting fusing wind-resistant spherical support is connected with the anchorage steel bar 16 and the tower body through a bolt 15. The beam body 18 can be ensured to be displaced relative to the bridge tower 19 along the bridge direction or the vertical direction through the plane friction pair, and the transverse displacement of the beam body 18 is limited under the action of limited transverse force.
As shown in fig. 5, a concave spherical surface having the same spherical radius as that of the spherical crown 4 is disposed on one side of the lower support plate 6 close to the spherical crown 4, the spherical surface of the spherical crown 4 is sleeved in the concave spherical surface of the lower support plate 6, and the first spherical wear-resistant plate 5 is disposed between the spherical surface and the concave spherical surface to form a spherical friction pair, so that the spherical crown 4 can be ensured to rotate in any direction, thereby realizing the rotation of the beam 18 in any direction. Similarly, a second annular groove 62 is formed in the outer ring of the concave spherical surface of the lower support plate 6, a sealing ring 3 is arranged in the second annular groove 62, the sealing ring 3 is located on the outer ring of the first spherical wear-resisting plate 5, and the sealing ring 3 also has dustproof and waterproof effects on the first spherical wear-resisting plate 5.
As shown in fig. 7 and 8, the spherical cap 4 and the lower seat plate 6 are connected by a stud 13 and fixed by a pressing plate 10. The center of spherical crown 4 is provided with the screw hole that runs through to the top down, the center of bottom suspension 6 is provided with the bolt hole that runs through to the top down, clamp plate 10 center sets up the screw hole that runs through, double-screw bolt 13 one end passes through threaded connection with spherical crown 4, double-screw bolt 13 runs through bottom suspension 6, the other end and the clamp plate 10 threaded connection of double-screw bolt 13, clamp plate 10 contradicts on bottom suspension 6, and double-screw bolt 13 extends to the clamp plate 10 outside and nut 12 threaded connection, it is fixed with double-screw bolt 13 and clamp plate 10 locking, play locking effect, guarantee limit force fusing anti-wind ball type support simultaneously when the side direction installation, spherical crown 4 can not break away from bottom suspension 6 because of the action of gravity. In order to prevent the damage of the wind-resistant spherical support structure caused by the limited-force fusing due to the loosening of the threads in the use process, a set screw 17 is arranged at the connecting threads of the stud 13 and the spherical crown 4, so that the anti-loose effect is achieved. The wind-resistant spherical bearing with force limitation fusing has the advantages that the connecting mode of the nut 12 and the stud 13 is adopted to play a role in rotating the pin shaft, so that the spherical crown 4 and the lower support plate 6 can rotate relatively, the rotating function of the wind-resistant spherical bearing with force limitation fusing is met, and the spherical crown 4 can be prevented from falling off in the installation process. And the stud 13 is connected with the pressing plate 10, so that the bending stress of the stud 13 is eliminated, the bending stress of the stud 13 is decomposed into the pulling force and the shearing force of the stud 13, the integral processing difficulty of the traditional rotating pin shaft is avoided, and the stress concentration is effectively avoided. The stud 13 and the spherical crown 4 are in threaded connection, threads which are easy to generate in the normal use process are not loosened, the stud 13 and the spherical crown 4 are locked and fixed through the set screw 17, the anti-loosening effect is also achieved, and the support structure damage caused by the loosening of the threads is avoided.
As shown in fig. 7, a notch 61 is formed in one side of the lower seat plate 6, which is away from the spherical crown 4, the bottom of the notch 61 is a convex spherical surface, and the convex spherical surface and the concave spherical surface of the lower seat plate 6 are concentric spherical surfaces. One side of the pressing plate 10 is set to be a concave spherical surface, the radius of the pressing plate is the same as that of the convex spherical surface of the lower support plate 6, and the concave spherical surface side of the pressing plate 10 is abutted against the convex spherical surface of the lower support plate 6. The second spherical wear-resisting plate 11 is arranged between the concave spherical surface of the pressing plate 10 and the convex spherical surface of the notch 61 of the lower support plate 6 to form a spherical friction pair, so that the rotating function of the spherical crown 4 in any direction under the condition that the lower support plate 6 is kept immovable can be ensured, and the rotation of the beam body 18 in any direction can be realized.
As shown in fig. 3, the lower support plate 6 is fixedly connected with the base 9 through a shear pin 7, wherein support plates 8 are fixedly arranged on two sides of one end of the base 9, which is far away from the beam 18, the support plates 8 are provided with shear pin holes, the shear pin 7 is fixed with the lower support plate 6 through the support plates 8 arranged on two sides of the base 9, and the shear pin 7 is provided with a plurality of shear pins.
As shown in fig. 4 and 6, cover plates 14 are fixedly arranged on two sides of one end of the base 9 away from the beam 18, the cover plates 14 are arranged on the base 9 perpendicular to the support plates 8, and the support plates 8 and the cover plates 14 fixed around the base 9 form a cavity structure at one end of the base 9 away from the beam 18. One end of the cover plate 14 is fixed on the base 9, the other end of the cover plate 14 is provided with an inner boss 211 facing the center of the base 9, two sides of one side of the lower support plate 6 close to the notch 61 are provided with outer bosses 212, and the outer bosses 212 of the lower support plate 6 are overlapped with the inner boss 211 of the cover plate 14 to form a buckle structure 21. The inner boss 211 of the lower support plate 6 is partially located in the cavity, a certain gap is left between the bottom of the inner boss 211 of the lower support plate 6 and the bottom of the cavity of the base 9, and the buckle structure 21 can ensure that the lower support plate 6 is always arranged in the cavity formed by the base 9 and the cover plate 14.
Meanwhile, as shown in fig. 4, the base 9 and the lower support plate 6 are connected by the buckle, so that the lower support plate 6 is still maintained in the cavity of the base 9 after the shear pin 7 is broken and releases the transverse force when the transverse force is too large when the wind-resistant ball support with limited force is fused, and the falling risk of the wind-resistant ball support body with limited force fused due to the transverse movement of the beam body 18 is effectively prevented due to the supporting effect of the buckle connection structure on the lower support plate 6.
It will be understood by those skilled in the art that the foregoing is merely a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included within the scope of the present invention.
Claims (10)
1. A force-limiting fusing wind-resistant spherical support is characterized by comprising a sliding plate (1), a spherical crown (4), a lower support plate (6) and a base (9); wherein,
the base (9) is fixedly connected with the beam body (18), and the sliding plate (1) is fixedly connected with the bridge tower (19);
the spherical crown (4) is arranged between the sliding plate (1) and the lower support plate (6) and is in sliding connection with the sliding plate (1) to form a plane friction pair, so that the beam body (18) is ensured to be displaced relative to the bridge tower (19) along the bridge direction or the vertical direction, and the transverse displacement of the beam body (18) is limited under the working condition that the transverse force is smaller than a threshold value;
the spherical crown (4) and the lower support plate (6) are connected through a stud (13) to jointly form a spherical friction pair, so that the lower support plate (6) is kept still, and the spherical crown (4) can rotate in any direction;
the lower support plate (6) is fixedly connected with the base (9) through a fusing mechanism, a pressing plate (10) is arranged between the lower support plate (6) and the base (9), the fusing mechanism is automatically sheared under the condition that the transverse force exceeds a threshold value, and the spherical friction pair is limited through the pressing plate (10), so that the support structure is guaranteed against failure.
2. A wind-resistant ball type support of claim 1, wherein said fusing mechanism comprises a shear pin (7), said base (9) is provided with a support plate (8), said support plate (8) is provided with a shear pin hole, said shear pin (7) is fixedly connected with said lower support plate (6) through said shear pin hole.
3. A wind-resistant ball type support fused in a limited manner according to claim 2, wherein the centers of the spherical crown (4), the lower support plate (6) and the pressure plate (10) are provided with threaded holes, and the stud (13) passes through the threaded holes and is locked and fixed through a nut (12).
4. A limited force fusing wind-resistant ball bearing according to any one of claims 1-3, characterized in that the sliding plate (1) is provided with a stainless steel plate (20) on the side close to the spherical cap, the spherical cap (4) is provided with a flat surface, the flat surface is provided with a groove (41), a flat wear-resisting plate (2) is arranged in the groove, and the flat wear-resisting plate (2) and the stainless steel plate (20) are matched to form a flat friction pair.
5. A wind-resistant ball type support of limited fusing according to claim 4, characterized in that the periphery of one side of the plane of the ball cap (4) is provided with a first annular groove (42), and the first annular groove (42) is internally provided with a sealing ring (3).
6. A force-limiting fusing wind-resistant ball bearing according to any one of claims 1-3, characterized in that one side of the lower bearing plate (6) close to the spherical crown (4) is provided with a concave spherical surface with the same spherical radius as the spherical surface of the spherical crown (4), the spherical surface of the spherical crown (4) is sleeved in the concave spherical surface of the lower bearing plate (6), and a first spherical wear-resisting plate (5) is arranged between the spherical surface and the concave spherical surface to form a spherical friction pair.
7. A force-limiting fusing wind-resistant ball type bearing according to claim 6, characterized in that the concave spherical surface of the lower bearing plate (6) is provided with a second annular groove (62) at the periphery, and a sealing ring (3) is arranged in the second annular groove (62).
8. A limited force fusing anti-wind ball bearing according to any of claims 1-3, characterized in that the lower bearing plate (6) is provided with a notch (61) at the side away from the spherical cap (4), the bottom of the notch (61) is a convex spherical surface, the pressure plate (10) is provided with a concave spherical surface at the side which has the same radius as the convex spherical surface of the lower bearing plate (6), and a second spherical wear plate (11) is arranged between the concave spherical surface of the pressure plate (10) and the convex spherical surface of the lower bearing plate (6).
9. A wind-resistant ball type support of limited fusing according to claim 8, characterized in that, the base (9) is provided with cover plates (14) at two sides of one end far away from the beam body (18), one end of the cover plate (14) is provided with an inner boss (211) facing the center of the base (9), two sides of one side of the cover plate (14) close to the notch (61) are provided with outer bosses (212), and the outer bosses (212) are overlapped with the inner boss (211) to form a buckling structure (21).
10. A force-limiting fusing wind-resistant ball type support according to any one of claims 1-3, characterized in that the stud (13) is in threaded fit with the spherical crown (4), and the set screw (17) is arranged at the threaded fit position of the stud and the spherical crown, so as to prevent the support from losing effect due to loosening of threads in use.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020697115.1U CN212670267U (en) | 2020-04-30 | 2020-04-30 | Wind-resistant spherical support capable of being fused in limited force mode |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020697115.1U CN212670267U (en) | 2020-04-30 | 2020-04-30 | Wind-resistant spherical support capable of being fused in limited force mode |
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| CN212670267U true CN212670267U (en) | 2021-03-09 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114182617A (en) * | 2022-01-14 | 2022-03-15 | 中铁大桥局集团有限公司 | Shock attenuation steel box girder and bridge structure system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114182617A (en) * | 2022-01-14 | 2022-03-15 | 中铁大桥局集团有限公司 | Shock attenuation steel box girder and bridge structure system |
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Effective date of registration: 20220217 Address after: No.88, Binhe North Road, hi tech Zone, Luoyang City, Henan Province Patentee after: LUOYANG SUNRUI SPECIAL EQUIPMENT Co.,Ltd. Patentee after: CHINA RAILWAY MAJOR BRIDGE RECONNAISSANCE & DESIGN INSTITUTE Co.,Ltd. Address before: 430084 No.9 Wudong street, Qingshan District, Wuhan City, Hubei Province Patentee before: WUHAN HIRUN ENGINEERING EQUIPMENT Co.,Ltd. Patentee before: CHINA RAILWAY MAJOR BRIDGE RECONNAISSANCE & DESIGN INSTITUTE Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: No.88, Binhe North Road, hi tech Zone, Luoyang City, Henan Province Patentee after: CSSC Shuangrui (Luoyang) special equipment Co.,Ltd. Patentee after: CHINA RAILWAY MAJOR BRIDGE RECONNAISSANCE & DESIGN INSTITUTE Co.,Ltd. Address before: No.88, Binhe North Road, hi tech Zone, Luoyang City, Henan Province Patentee before: LUOYANG SUNRUI SPECIAL EQUIPMENT Co.,Ltd. Patentee before: CHINA RAILWAY MAJOR BRIDGE RECONNAISSANCE & DESIGN INSTITUTE Co.,Ltd. |