Mounting bracket of laser displacement meter and counterweight method of wide-width rotary bridge

Abstract

The application discloses a mounting bracket of a laser displacement meter and a counterweight method of a wide-width rotary bridge, belongs to the technical field of mounting brackets, and can solve the problems of slow leveling speed, poor effect and inconvenient height adjustment of the existing laser displacement meter. The mounting bracket comprises a resisting plate, an extension frame, a leveling plate, a rotating structure, a fixing structure and a height adjustment structure; one side of the resisting plate is matched with the side surface of the upper turntable of the rotary ball hinge structure; the two ends of the extension frame are connected with the resisting plate and the leveling plate respectively; the rotating structure is fixedly connected with the leveling plate and the height adjustment structure respectively, so that the leveling plate and the height adjustment structure can relatively freely rotate; the laser displacement meter is arranged on the height adjustment structure, and the height adjustment structure is configured to adjust the height of the laser displacement meter; when the height adjustment structure is freely rotated relative to the leveling plate under the action of gravity to level the laser displacement meter, the fixing structure fixes the rotating structure. The application has the advantages of fast leveling speed, good effect and convenient height adjustment of the laser displacement meter.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mounting support, in particular to a mounting support of laser displacement meter and counterweight method of wide-width swivel bridge. BACKGROUND

[0002] Bridge swivel construction is a new bridge construction technology, which has the advantages of utilizing terrain, facilitating prefabrication, not affecting traffic during construction, requiring less construction equipment, simple device, saving construction materials, etc. Bridge swivel construction technology is used in many bridges crossing railways and highways. The technology is to prefabricate half of the bridge on both sides of a river or a line by utilizing terrain and using simple supports, and then to make the two half bridges at an intersection angle or in parallel to swivel to the bridge axis position and fold into a bridge by using the swivel ball hinge structure and the continuous jack swivel construction in the later stage.

[0003] During the bridge swivel construction, the displacement monitoring of the swivel ball hinge structure is crucial for the swivel weighing and the deflection control of the beam body. At present, the displacement monitoring of the swivel ball hinge structure is to paste the laser displacement meter at the swivel ball hinge structure, and then to manually level the laser displacement meter, which is slow and has poor effect. This method is also affected by the vibration and position change during the swivel process, which may result in unstable and inaccurate measurement results. Moreover, the height adjustment of the laser displacement meter is extremely inconvenient.

[0004] In addition, the swivel bridge may cause different mass distribution and stiffness of the cantilever beam segments on both sides of the piers along the vertical plane of the beam axis due to the installation error of the swivel support system, the mass distribution difference of the beam body, and the difference in the degree of prestress tension, thereby generating unbalanced moments. The unbalanced moment problem caused by eccentricity must be solved before the swivel, so that the rotating body works under self-balancing or counterweight balancing after the complete removal of the construction support and during the swivel process, which plays a crucial role in the safety of the construction process. In order to ensure the smooth progress of the bridge swivel and provide a basis for the command and decision-making of the bridge swivel stage, it is necessary to conduct a rotating body weighing test before the swivel to test the unbalanced parameters of the rotating body part and to balance the counterweight accordingly. However, due to the poor leveling effect of the existing laser displacement meter, the counterweight is inaccurate. SUMMARY

[0005] The mounting support of laser displacement meter and the counterweight method of wide-width swivel bridge provided by the present application can solve the problems of slow leveling speed, poor effect, instability, inaccuracy, and extremely inconvenient height adjustment of the existing laser displacement meter.

[0006] The embodiment of the present application provides a mounting bracket of a laser displacement meter, which comprises a resisting plate, an extension frame, a leveling plate, a rotating structure, a fixing structure and a height adjusting structure; one side of the resisting plate is matched with the side of the upper rotating disc of the rotating ball hinge structure; the two ends of the extension frame are connected with the resisting plate and the leveling plate respectively; the rotating structure is fixedly connected with the leveling plate and the height adjusting structure, so that the leveling plate and the height adjusting structure can rotate freely relative to each other; the laser displacement meter is arranged on the height adjusting structure, and the height adjusting structure is configured to adjust the height of the laser displacement meter; when the height adjusting structure is freely rotated relative to the leveling plate under the action of gravity to level the laser displacement meter, the fixing structure fixes the rotating structure.

[0007] In a possible implementation manner of the first aspect, the rotating structure comprises a bearing and a main shaft; the inner ring of the bearing is sleeved on the main shaft; the main shaft is fixedly arranged on the leveling plate; and the outer ring of the bearing is fixed with the height adjusting structure.

[0008] In a possible implementation manner of the first aspect, the rotating structure further comprises a rubber ring and a groove ring; the rubber ring is sleeved on the outer ring of the bearing; and the groove ring is sleeved on the outer ring of the rubber ring.

[0009] In a possible implementation manner of the first aspect, the fixing structure comprises a bolt; the bolt is arranged on the top of the leveling plate; and the front end of the bolt can be abutted against or away from the groove ring by screwing the bolt.

[0010] In a possible implementation manner of the first aspect, the fixing structure further comprises a sleeve, a fan ring block and a pad block; the fan ring block is clamped in the groove ring; one end of the sleeve is arranged on the outer arc surface of the fan ring block; the pad block is arranged in the sleeve; and the front end of the bolt is arranged in the sleeve.

[0011] In a possible implementation manner of the first aspect, the height adjusting structure comprises a long plate, a guide rail and a sliding plate; the guide rails are arranged on the two sides of the long plate respectively; the sliding plate is provided with guide grooves on the two sides, and the guide grooves are slidingly arranged on the guide rails at the corresponding positions; the rotating structure is fixedly connected with the sliding plate, and the laser displacement meter is arranged on the long plate.

[0012] In a possible implementation manner of the first aspect, the extension frame comprises four telescopic rods; one end of each of the four telescopic rods is fixed with a corner of the leveling plate, and the other end is fixed with the resisting plate.

[0013] The second aspect, another embodiment of the present application provides a counterweight method of a wide-span rotating bridge, based on the mounting bracket of the laser displacement meter in any of the above aspects, comprising:

[0014] Select two measuring points on both sides of the swivel ball joint structure along the longitudinal and transverse directions respectively;

[0015] Before the sand box is dismantled, a jacking structure is set up on both sides of each measuring point, and a mounting bracket is set up at the corresponding position of the measuring point so that the abutment plate of the mounting bracket is attached to the side of the upper turntable of the swivel ball joint structure, and a laser displacement meter is set on the height adjustment structure of each mounting bracket;

[0016] After the sand box is removed, the laser displacement meter is started and a reading is obtained, and the half-bridge swivel is judged to be in the first unbalanced state or the second unbalanced state according to the reading. In the first unbalanced state, the friction torque is greater than the unbalanced torque, and the reading of the laser displacement meter does not change much. In the second unbalanced state, the friction torque is less than the unbalanced torque, and the reading of the laser displacement meter becomes smaller on the side where the center of gravity is located and becomes larger on the other side.

[0017] When the half-bridge swivel is in the first unbalanced state, the lifting force is applied to the lifting structures on both sides of the first measuring point and the second measuring point in the first direction in sequence, and the P1-△1 curve and the P2-△2 curve are fitted. The P1 value at the mutation point of △1 and △2 is P 1变、 P2 value is P 2变 , where the first direction is longitudinal or transverse, P1 and P2 are the total lifting forces of the lifting mechanism on both sides of the first and second measuring points respectively, △ 1、 △2 is the reading of the laser displacement meter when the lifting force is applied to the lifting structures on both sides of the first measuring point and the second measuring point at the same time and in stages;

[0018] When the half-bridge swivel is in the second unbalanced state, the lifting structures on both sides of the measuring point close to the tipping point in the first direction simultaneously apply lifting forces in stages, and the fitting P 升 -△ 升 Curve, pick △ 升 P at the mutation point 升 The value is P 升变 , where P 升 is the total lifting force of the lifting mechanisms on both sides of the measuring point, △ 升 is the reading of the laser displacement meter when the lifting force is applied to the lifting structures on both sides of the measuring point at the same time; then the lifting structures on both sides of the measuring point are lowered at the same time, and the fitting P 落 -△ 落 curve, pick up P at the mutation point 落 The value is P 落变 , where P 落 is the total drop force of the jacking mechanism on both sides of the measuring point, △ 落 The reading of the laser displacement meter when the jacking structures on both sides of the measuring point are simultaneously and graded to fall down;

[0019] When the half-bridge rotor is in the first unbalanced state, the unbalanced moment, the frictional moment, the static friction coefficient, the eccentricity and the counterweight weight are calculated by P1 and P2; when the half-bridge rotor is in the second unbalanced state, the unbalanced moment, the frictional moment, the static friction coefficient, the eccentricity and the counterweight weight are calculated by P 升变 , P 落变 .

[0020] According to the counterweight weight, the counterweight is arranged.

[0021] In a possible implementation manner of the second aspect, the unbalanced moment, the frictional moment, the eccentricity, the static friction coefficient and the counterweight weight are calculated by P 1变 , P 2变 .

[0022] M Z =(P 2变 ×L2+P 1变 ×L1) / 2,

[0023] M G =(P 2变 ×L2-P 1变 ×L1) / 2,

[0024] e=M G / N,

[0025] μ Z =M Z / 0.98RN,

[0026] N1=(N×e) / L,

[0027] wherein M Z is the unbalanced moment in the first direction, M G is the frictional moment in the first direction, e is the eccentricity in the first direction, μ Z is the static friction coefficient in the first direction, N1 is the counterweight weight in the first direction, L2 is the distance between the center of gravity of the jacking structure on the two sides of the second measuring point and the bridge transverse axis in the first direction, L1 is the distance between the center of gravity of the jacking structure on the two sides of the first measuring point and the bridge transverse axis in the first direction, N is the weight of the half-bridge rotor, R is the spherical radius of the rotor spherical hinge structure, and L is the distance between the counterweight center in the first direction and the rotation center.

[0028] In a possible implementation manner of the second aspect, the unbalanced moment, the frictional moment, the eccentricity, the static friction coefficient and the counterweight weight are calculated by P 升变 , P 落变 .

[0029] M Z =(P 升变× L3 + P 落变 × L3) / 2,

[0030] M G = (P 升变 × L3 - P 落变 × L3) / 2,

[0031] e = M G / N,

[0032] μ Z = M Z / 0.98 RN,

[0033] N1= (N x e) / L,

[0034] Wherein, M Z is the unbalanced moment of the first direction, M G is the frictional moment of the first direction, e is the eccentricity of the first direction, μ Z is the static friction coefficient of the first direction, N1 is the counterweight weight of the first direction, L3 is the distance between the center of force of the jacking structure on both sides of the measuring point close to the dumping point and the bridge transverse axis parallel to the first direction, N is the weight of the half-bridge rotor, R is the spherical radius of the rotor spherical hinge structure, and L is the distance between the counterweight center of gravity and the rotation center in the first direction.

[0035] One or more technical solutions provided in the embodiments of the application have at least the following technical effects or advantages:

[0036] The mounting bracket of the laser displacement meter provided in the embodiment of the present application has one side of the support plate adapted to the surface of the upper turntable of the swivel ball joint structure. When installing the laser displacement meter, the side of the support plate adapted to the surface of the upper turntable of the swivel ball joint structure is bonded to the swivel ball joint structure. The two ends of the telescopic frame are respectively connected to the support plate and the adjustment plate. The rotating structure fixes the adjustment plate and the height adjustment structure respectively, and the laser displacement meter is arranged on the height adjustment structure. Thus, the telescopic frame can adjust the relative distance between the laser displacement meter and the support plate, so that during actual measurement, the laser displacement meter can measure the displacement change of the upper turntable of the swivel ball joint structure. Because the rotating structure is respectively connected to the adjustment plate and the height adjustment structure, the adjustment plate and the height adjustment structure can rotate relatively freely. When the support plate is bonded to the swivel ball joint structure, the height adjustment structure rotates relative to the adjustment plate under the action of gravity, so that the laser displacement meter arranged on the height adjustment structure can be automatically leveled, so that the laser displacement meter and the swivel ball joint structure remain in a vertical state, thereby improving the accuracy of the measurement. Thereafter, the fixing structure can fix the rotating structure. The present application can level the laser displacement meter according to the effect of gravity, and the leveling speed is fast and the effect is good. The laser displacement meter is located on the height adjustment structure, and the height of the laser displacement meter can be adjusted in time according to the actual height requirement of the laser displacement meter, so that the laser displacement meter can be maintained at a suitable height for effective measurement and monitoring, and the height adjustment is convenient. The setting of the telescopic frame and the height adjustment structure can enable the laser displacement meter to be automatically calibrated and leveled under different positions and terrain conditions to ensure the precision and accuracy of the displacement measurement, and is not subject to vibration and position changes during the rotation process. The measurement results are stable and accurate. Since the leveling effect of the laser displacement meter is good, the counterweight is accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0038] Figure 1 A schematic structural diagram of a mounting bracket for a laser displacement meter according to an embodiment of the present application;

[0039] Figure 2 A schematic diagram of the structure of the rotating structure and the fixed structure provided in an embodiment of the present application;

[0040] Figure 3 A schematic diagram of the structure of the counterweight method for a wide-width rotating bridge provided in an embodiment of the present application Figure 1 ;

[0041] Figure 4 A schematic diagram of the structure of the counterweight method for a wide-width rotating bridge provided in an embodiment of the present applicationFigure 2 .

[0042] Icon: A-mounting bracket; 1-plate; 2-telescopic frame; 21-telescopic rod; 3-leveling plate; 4-rotating structure; 41-main shaft; 42-bearing; 43-rubber ring; 44-groove ring; 5-fixing structure; 51-bolt; 52-sleeve; 53-fan ring block; 6-height adjustment structure; 61-long plate; 62-guide rail; 63-slide plate; 64-placing frame; B-laser displacement meter; C-rotary ball hinge structure; C1-upper turntable; C2-lower turntable; D-upper bearing platform; E-lower bearing platform; F-supporting leg; G-measuring point; H-jacking structure; I-bridge pier. DETAILED DESCRIPTION

[0043] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0044] In the description of the embodiments of the present application, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. The terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance. In addition, the terms "mounting", "connecting", "connection" should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integral connection; can be mechanical connection, can also be electrical connection; can be direct connection, can also be indirect connection through an intermediate medium, and can be the communication between two elements inside. For those skilled in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0045] Please refer to Figure 1 and Figure 2 The mounting bracket A of the laser displacement meter B provided by the embodiments of the present application comprises a plate 1, a telescopic frame 2, a leveling plate 3, a rotating structure 4, a fixing structure 5 and a height adjustment structure 6. One side of the plate 1 is adapted to the side surface of the upper turntable C1 of the rotary ball hinge structure C. The plate 1 has a certain curvature, and the side of the plate 1 adapted to the surface of the rotary ball hinge structure C is bonded to the rotary ball hinge structure C, and the bonding agent is generally high-performance epoxy resin.

[0046] The two ends of the telescopic frame 2 are connected with the resisting plate 1 and the leveling plate 3 respectively. The telescopic frame 2 can adjust its length by telescoping, so that the laser displacement meter B installed on the mounting bracket A can adapt to displacement monitoring in different environments.

[0047] The rotating structure 4 is fixedly connected with the leveling plate 3 and the height adjusting structure 6 respectively, so that the leveling plate 3 and the height adjusting structure 6 can rotate relatively freely. The laser displacement meter B is arranged on the height adjusting structure 6, and the height adjusting structure 6 is configured to adjust the height of the laser displacement meter B and the resisting plate 1. When the height adjusting structure 6 rotates relatively freely to the leveling plate 3 under the action of gravity to level the laser displacement meter B, the fixing structure 5 fixes the rotating structure 4.

[0048] The mounting bracket A of the laser displacement meter B provided by the embodiment of the application is provided with the resisting plate 1, the surface of the upper rotating disc C1 of the rotating ball hinge structure C is matched with one side of the resisting plate 1, and the one side of the resisting plate 1 matched with the surface of the upper rotating disc C1 of the rotating ball hinge structure C is bonded to the rotating ball hinge structure C when the laser displacement meter B is installed. The two ends of the telescopic frame 2 are connected with the resisting plate 1 and the leveling plate 3 respectively, the rotating structure 4 is fixedly connected with the leveling plate 3 and the height adjusting structure 6 respectively, and the laser displacement meter B is arranged on the height adjusting structure 6. Therefore, the telescopic frame 2 can adjust the relative distance between the laser displacement meter B and the resisting plate 1, so that the laser displacement meter B can measure the displacement change of the upper rotating disc C1 of the rotating ball hinge structure C during actual measurement. Because the rotating structure 4 is connected with the leveling plate 3 and the height adjusting structure 6 respectively, the leveling plate 3 and the height adjusting structure 6 can rotate relatively freely. When the resisting plate 1 is bonded to the rotating ball hinge structure C, the height adjusting structure 6 rotates relatively to the leveling plate 3 under the action of gravity, so that the laser displacement meter B arranged on the height adjusting structure 6 can be leveled automatically, the laser displacement meter B and the rotating ball hinge structure C can be kept in a vertical state, the measurement accuracy is improved, and then the fixing structure 5 fixes the rotating structure 4. The laser displacement meter B can be leveled according to the gravity, the leveling speed is fast and the effect is good. The laser displacement meter B is arranged on the height adjusting structure 6, the height of the laser displacement meter B can be adjusted in time according to the actual height requirement of the laser displacement meter B, so that the laser displacement meter B can be kept at a suitable height to perform effective measurement and monitoring, and the height adjustment is convenient. The arrangement of the telescopic frame 2 and the height adjusting structure 6 can enable the laser displacement meter B to realize automatic calibration and leveling in different positions and terrain conditions, so as to ensure the accuracy and accuracy of displacement measurement, and the measurement result is stable and accurate. Because the leveling effect of the laser displacement meter B is good, the counterweight is accurate.

[0049] The installation support A provided by the embodiment of the application enables the laser displacement meter B to be leveled in different positions and terrain conditions, so as to ensure the accuracy and precision of the measurement of the laser displacement meter B. The vibration and position change of the swivel ball hinge structure C during rotation do not affect the laser displacement meter B, and further do not affect the stability and accuracy of the measurement result. The application reduces the need for manual intervention and adjustment, reduces the labor cost and construction period, and thus reduces the construction cost. The installation support A of the laser displacement meter B with the automatic leveling and controllable height functions can realize the intelligentization and automation of displacement monitoring during the swivel process, improve the efficiency and precision of the bridge swivel construction, and improve the construction efficiency. The device design scheme with the automatic leveling and controllable height functions can reduce the need for manual intervention and adjustment, reduce the labor cost and construction period, and thus optimize the construction cost benefit and construction cost. The embodiment of the application can solve the displacement monitoring problem in the bridge swivel construction, improve the technical prospect and market competitiveness, and improve the technical application prospect.

[0050] As shown in Figure 2 The inner ring of the bearing 42 is sleeved on the main shaft 41. The main shaft 41 is fixedly arranged on the leveling plate 3. The outer ring of the bearing 42 is fixed with the height adjustment structure 6, so that the height adjustment structure 6 is subjected to the action of gravity, the outer ring of the bearing 42 rotates relative to the inner ring, the height adjustment structure 6 rotates relative to the leveling plate 3, and finally the laser displacement meter B rotates relative to the base plate 1, so that the leveling of the laser displacement meter B is realized. The outer ring of the bearing 42 and the height adjustment structure 6 are generally fixed by bonding, and the bonding agent is generally high-performance epoxy resin. The swivel structure 4 of the application is easy to realize and has good swivel effect.

[0051] The bearing 42 can be purchased or prepared by oneself. First, a steel pipe is processed into the shape and size of the inner ring and the outer ring, and a plurality of grooves are arranged in a ring array around the central axis of the inner ring at the corresponding positions of the outer wall of the inner ring and the inner wall of the outer ring for arranging rolling spheres. The steel pipe material is high-hardness and high-wear-resistance alloy steel GCr15. The processed inner ring and outer ring need to be heat treated to improve their hardness and wear resistance. The rolling spheres are key components for supporting and rotating in the bearing 42, and are made of high-precision steel balls. Support frames are arranged between the rolling spheres. The end face of the inner ring is provided with an outer rim, and the end face of the outer ring is provided with an inner rim, so as to fix the rolling spheres between the inner ring and the outer ring.

[0052] Continuing to refer to Figure 2As shown, the rotating structure 4 further comprises a rubber ring 43 and a groove ring 44. The cross section of the groove ring 44 perpendicular to the circumference of the groove ring 44 is U-shaped. The rubber ring 43 is sleeved on the outer ring of the bearing 42. The groove ring 44 is sleeved on the outer ring of the rubber ring 43. The outer ring of the bearing 42 is bonded to the rubber ring 43 by an adhesive, and the groove ring 44 is bonded to the groove ring 44 by an adhesive. The rubber ring 43 can increase the friction between the groove ring 44 and the outer ring of the bearing 42. The setting of the groove ring 44 can cooperate with the fixing structure 5 to help the fixing structure 5 to be fixed. The rubber ring 43 is selected from high roughness rubber materials. The adhesive is preferably selected from high-performance epoxy resins.

[0053] Further, continue as Figure 1 As shown, the fixing structure 5 comprises a bolt 51. The bolt 51 is threaded through the top of the leveling plate 3, and the front end of the bolt 51 can be abutted or away from the groove ring 44 by screwing the bolt 51. Generally, the front end of the bolt 51 is away from the groove ring 44, and when the bearing 42 needs to be fixed, the bolt 51 is screwed, the front end of the bolt 51 is abutted to the groove ring 44, that is, the bearing 42 is fixed, and then the height adjusting structure 6 is fixed.

[0054] Alternatively, the fixing structure 5 further comprises a sleeve 52, a fan ring block 53 and a pad. The fan ring block 53 is clamped in the groove ring 44. The inner arc surface is matched with the inner bottom surface of the groove ring 44. One end of the sleeve 52 is arranged on the outer arc surface of the fan ring block 53. The pad is arranged in the sleeve 52. The front end of the bolt 51 is arranged in the sleeve 52. When the height adjusting structure 6 rotates, the fan ring block 53, the pad, the sleeve 52 and the bolt 51 are relatively loose relative to the position of the groove ring 44, and can rotate relative to the groove ring 44. When the bearing 42 needs to be fixed, the bolt 51 is screwed, the pad is pressed by the bolt 51, the fan ring block 53 is pressed by the pad, the fan ring block 53 is abutted to the groove ring 44, and the fixing of the outer ring of the bearing 42 is realized. The setting of the fan ring block 53 improves the contact area between the fixing structure 5 and the groove ring 44, and the friction provided by the fixing structure 5 is larger, so that the fixing effect is better. The groove ring 44 and the sleeve 52 together limit the position of the fan ring block 53.

[0055] As Figure 1As shown, the height adjustment structure 6 comprises a long plate 61, guide rails 62 and a sliding plate 63. The guide rails 62 are arranged on both sides of the long plate 61. The sliding plate 63 is provided with guide grooves on both sides, which are slidably arranged on the guide rails 62 at corresponding positions. The rotating structure 4 is fixedly connected to the sliding plate 63, and the laser displacement meter B is arranged on the long plate 61, so that when the sliding plate 63 slides along the guide rails 62, the resistance plate 1, the telescopic frame 2, the leveling plate 3, the rotating structure 4 and the fixed structure 5 connected with the sliding plate 63 can slide relative to the long plate 61, thereby adjusting the relative height of the swivel spherical hinge structure C connected with the resistance plate 1 and the laser displacement meter B. The height adjustment structure 6 provided by the embodiment of the present application has simple structure and is easy to implement, and can realize the sliding of the resistance plate 1 relative to the laser displacement meter B. Of course, the guide rails 62 can be screw rods, and the guide grooves are provided with internal threads, and the sliding control of the sliding plate 63 relative to the long plate 61 and the fixation between the sliding plate 63 and the long plate 61 can be realized by driving the screw rods to rotate by a motor.

[0056] At this time, a placing frame 64 is further arranged on the side of the long plate 61 away from the resistance plate 1, and the placing frame 64 can place the battery of the laser displacement meter B.

[0057] Optionally, the height adjustment structure 6 can further comprise an electric sliding table. One end of the sliding rail of the electric sliding table is fixedly connected with the rotating structure 4. The laser displacement meter B is arranged on the bearing table of the electric sliding table. The electric sliding table can realize millimeter-level positioning accuracy, has excellent stability and reliability, strong adaptability, can be intelligently controlled, has excellent anti-interference ability, and can stably operate in a complex industrial environment. The height adjustment structure 6 of the embodiment of the present application adopts the electric sliding table, can realize the sliding of the laser displacement meter B relative to the resistance plate 1, makes the height adjustment of the laser displacement meter B automatic, and does not need personnel to adjust the height of the laser displacement meter B on site during the work process.

[0058] Continuing to refer to Figure 1 As shown, the telescopic frame 2 comprises four telescopic rods 21. One end of each of the four telescopic rods 21 is fixedly connected with a corner of the leveling plate 3 through a bolt 51, and the other end of each of the four telescopic rods 21 is fixedly connected with the resistance plate 1. As shown in Figure 3 As shown, the other end of each of the four telescopic rods 21 is fixedly connected with the upper side and the lower side of the resistance plate 1 through the bolt 51. The telescopic frame 2 comprises the four telescopic rods 21, can stably fix the resistance plate 1 and the leveling plate 3, and can reduce the weight of the installation support A. The four telescopic rods 21 have stable structure and good fixing effect. The four telescopic rods 21 can adjust their lengths through self-elongation, and the laser displacement meter B installed on the installation support A can adapt to displacement monitoring in different environments.

[0059] For a wide-span swivel bridge, transverse and longitudinal weighing tests need to be performed. Another embodiment of the present application provides a counterweight method for a wide-span swivel bridge, based on the installation support A of the laser displacement meter B, comprising steps one to six:

[0060] Step one: select two measuring points G on the longitudinal and transverse sides of the swivel ball hinge structure C. The measuring points G are at the corresponding positions of the supporting legs F. As shown in Figure 3 , the direction of the arrow is the driving direction of the road, i.e. the longitudinal direction, and the direction perpendicular to the longitudinal direction is the transverse direction. Select two measuring points G on the longitudinal sides of the swivel ball hinge structure C, i.e. the measuring points G1 and G2 in Figure 3 , and select two measuring points G on the transverse sides of the swivel ball hinge structure C, i.e. the measuring points G3 and G4 in Figure 3 .

[0061] Step two: before the removal of the sand box, set the jacking structure H on both sides of each measuring point G. As shown in Figure 4 , set the jacking mechanism H1-1 and H1-2 on both sides of the measuring point G1, set the jacking mechanism H2-1 and H2-2 on both sides of the measuring point G2, set the jacking mechanism H3-1 and H3-2 on both sides of the measuring point G3, and set the jacking mechanism H4-1 and H4-2 on both sides of the measuring point G4.

[0062] As shown in Figure 3 , the upper side of the swivel ball hinge structure C is the upper turntable C1, the lower side is the lower turntable C2, the upper side of the upper turntable C1 is the upper bearing platform D, the upper side of the upper bearing platform D is the bridge pier I, and the lower side of the lower turntable C2 is the lower bearing platform E.

[0063] Erect the installation support A at the corresponding position of the measuring point G so that the abutting plate 1 of the installation support A is attached to the side of the upper turntable C1 of the swivel ball hinge structure C, and set the laser displacement meter B on the height adjustment structure 6 of each installation support A.

[0064] Step three: after the removal of the sand box, start the laser displacement meter B and obtain the reading. Due to the unbalanced moment, one side of the supporting leg F falls to the ground. It is assumed that the supporting leg F between the measuring point G2 and the measuring point G3 falls to the ground. Determine whether the half-bridge swivel is in the first unbalanced state or the second unbalanced state according to the reading, wherein the first unbalanced state is that the frictional resistance moment is greater than the unbalanced moment, and the laser displacement meter B shows that the readings do not change much. At this time, remove the sand box and other constraints, and the wide-span rotating bridge is still in a balanced state. The second unbalanced state is that the frictional resistance moment is less than the unbalanced moment, and the laser displacement meter B shows that the readings on one side of the center of gravity decrease and the readings on the other side increase. At this time, remove the sand box and other constraints, and the wide-span rotating bridge tilts towards the side of the center of gravity until the part of the supporting leg F on that side contacts the slide.

[0065] Step 4: When the half-bridge is in the first unbalanced state, apply lifting force to the lifting structure H on both sides of the first measuring point and the second measuring point in the first direction (when the first direction is longitudinal, the first measuring point and the second measuring point are G1 and G2 respectively, when the first direction is transverse, the first measuring point and the second measuring point are G3 and G4 respectively), fit the P1-△1 curve and the P2-△2 curve, and pick the P1 value at the mutation point of △1 and △2 as P 1变、 P2 value is P 2变 , where the first direction is longitudinal or transverse. That is, when longitudinal counterweight is required, the first direction is longitudinal; when transverse counterweight is required, the first direction is transverse. P1 and P2 are the total lifting forces of the lifting mechanism on both sides of the first and second measuring points, respectively. 1、 △2 is the reading of the laser displacement meter B when the lifting force is applied to the lifting structure H on both sides of the first measuring point and the second measuring point at the same time and in stages.

[0066] When the half-bridge is in the second unbalanced state, the lifting structures H on both sides of the measuring point G close to the tipping point in the first direction simultaneously apply lifting forces in stages, fitting P 升 -△ 升 Curve, pick △ 升 P at the mutation point 升 The value is P 升变 , where P 升 is the total lifting force of the lifting mechanism on both sides of the measuring point G, △ 升 is the reading of the laser displacement meter B when the lifting force is applied to the lifting structures H on both sides of the measuring point G at the same time. After that, the lifting structures H on both sides of the measuring point G are lowered at the same time, and the fitting P 落 -△ 落 curve, pick up P at the mutation point 落 The value is P 落变 , where P 落 is the total drop force of the jacking mechanism on both sides of the measuring point G, △ 落 It is the reading of the laser displacement meter B when the jacking structures H on both sides of the measuring point G are simultaneously and stepwise lowered.

[0067] Step 5: When the half-bridge is in the first unbalanced state, calculate the unbalanced torque, friction torque, static friction coefficient, eccentricity and counterweight weight through the changes of P1 and P2. The formula is:

[0068] M Z =(P 2变 ×L2+P 1变 × L1) / 2,

[0069] M G =(P 2变 ×L2-P 1变 × L1) / 2,

[0070] E = M G / N,

[0071] μ Z = M Z / 0.98RN,

[0072] N1 = (N x E) / L,

[0073] wherein M Z is the unbalanced moment in the first direction, M G is the frictional moment in the first direction, E is the eccentricity in the first direction, μ Z is the static friction coefficient in the first direction, N1 is the counterweight weight in the first direction, L2 is the distance between the center of gravity of the jacking structure H on both sides of the second measuring point G2 and the bridge transverse axis parallel to the first direction (when the first direction is the longitudinal direction, the bridge transverse axis parallel to the first direction is the horizontal dashed line in Figure 3 ; when the first direction is the transverse direction, the bridge transverse axis parallel to the first direction is the vertical dashed line in ​ ), L1 is the distance between the center of gravity of the jacking structure H on both sides of the first measuring point G1 and the bridge transverse axis parallel to the first direction, N is the weight of the half-bridge rotor, R is the spherical radius of the rotor spherical hinge structure C, and L is the distance between the counterweight center of gravity and the rotation center in the first direction.

[0074] When the half-bridge rotor is in the second unbalanced state, the unbalanced moment, the frictional moment, the static friction coefficient, the eccentricity, and the counterweight weight are calculated by P 升变 , P 落变 , and the formula is:

[0075] M Z = (P 升变 x L3 + P 落变 x L3) / 2,

[0076] M G = (P 升变 x L3 - P 落变 x L3) / 2,

[0077] E = M G / N,

[0078] μ Z = M Z / 0.98RN,

[0079] N1 = (N x E) / L,

[0080] wherein M Z is the unbalanced moment in the first direction, M G is the frictional moment in the first direction, E is the eccentricity in the first direction, μ ZThe static friction coefficient in the first direction, N1 is the weight of the counterweight in the first direction, L3 is the distance between the center of force of the jacking structure H on both sides of the measuring point G near the dumping point in the first direction and the bridge transverse axis parallel to the first direction, N is the weight of the half-bridge rotor, R is the spherical radius of the rotor spherical hinge structure C, and L is the distance between the first direction counterweight center and the rotation center.

[0081] Step six: counterweight according to the counterweight weight.

[0082] The counterweight method of the wide-span rotating bridge provided by the embodiment of the application can realize automatic calibration and leveling of the laser displacement meter B under different positions and terrain conditions through the installation of the laser displacement meter B by the installation support A, so that the accuracy and precision of displacement measurement are ensured, and the measurement result is stable and accurate and is not affected by vibration and position change in the rotating process. The counterweight is accurate due to the good leveling effect of the laser displacement meter B. Data automatic reading and mutation point discrimination can be realized, and full-automatic data acquisition and information analysis can be realized without manual operation.

[0083] The various embodiments in the specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referred to each other. Each embodiment mainly describes the difference from other embodiments.

[0084] The above embodiments are only used to illustrate the technical solutions of the application, and are not limited to the application. Although the application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features. The modification or replacement does not make the essence of the corresponding technical solution deviate from the scope of the technical solutions of the application.

Claims

1. A mounting bracket for a laser displacement meter, characterized in that: It includes a stop plate, a telescopic frame, an adjustment plate, a rotating structure, a fixed structure and a height adjustment structure; One side of the abutment plate is adapted to the side surface of the upper turntable of the swivel ball joint structure; The two ends of the telescopic frame are respectively connected to the abutment plate and the adjustment plate; The rotating structure is respectively connected to the adjusting plate and the height adjusting structure, so that the adjusting plate and the height adjusting structure can rotate freely relative to each other; The laser displacement meter is disposed on the height adjustment structure, and the height adjustment structure is configured to adjust the height of the laser displacement meter. When the height adjustment structure is freely rotated relative to the adjustment plate under the action of gravity until the laser displacement meter is leveled, the fixing structure fixes the rotating structure; The rotating structure includes a bearing and a main shaft; The inner ring of the bearing is fixed on the main shaft; The main shaft is fixed on the adjustment plate; The outer ring of the bearing is fixed to the height adjustment structure; Height adjustment structures include longboards, rails, and slides; Guide rails are provided on both sides of the longboard; Guide grooves are provided on both sides of the slide, and the guide grooves are slidably arranged on guide rails at corresponding positions; The rotating structure is fixedly connected to the slide plate, and the laser displacement meter is arranged on the long board; The telescopic frame includes four telescopic rods; One end of the four telescopic rods is respectively fixed to the four corners of the adjustment plate, and the other end is respectively fixed to the abutment plate.

2. The mounting bracket of the laser displacement meter according to claim 1, characterized in that: The rotating structure also includes a rubber ring and a groove ring; The rubber ring is sleeved on the outer ring of the bearing; The groove ring is sleeved on the outer ring of the rubber ring.

3. The mounting bracket of the laser displacement meter according to claim 2, characterized in that: The fixing structure includes a bolt; The bolt is passed through the top of the adjustment plate, and when the bolt is screwed, the front end of the bolt can be against or away from the groove ring.

4. The mounting bracket for the laser displacement meter according to claim 3, characterized in that: The fixing structure also includes a sleeve, a sector ring block and a spacer block; The fan ring block is clamped in the groove ring; One end of the sleeve is arranged on the outer arc surface of the sector ring block; The pad is arranged in the sleeve; The front end of the bolt is arranged in the sleeve.

5. A counterweight method for a wide rotating bridge, characterized in that: The mounting bracket of the laser displacement meter according to any one of claims 1 to 4 comprises: Select two measuring points on both sides of the swivel ball joint structure along the longitudinal and transverse directions respectively; Before the sand box is dismantled, a jacking structure is set up on both sides of each measuring point, and a mounting bracket is set up at the corresponding position of the measuring point so that the abutment plate of the mounting bracket is attached to the side of the upper turntable of the swivel ball joint structure, and a laser displacement meter is set on the height adjustment structure of each mounting bracket; After the sand box is removed, the laser displacement meter is started and a reading is obtained, and the half-bridge swivel is judged to be in the first unbalanced state or the second unbalanced state according to the reading. In the first unbalanced state, the friction torque is greater than the unbalanced torque, and the reading of the laser displacement meter does not change much. In the second unbalanced state, the friction torque is less than the unbalanced torque, and the reading of the laser displacement meter becomes smaller on the side where the center of gravity is located and becomes larger on the other side. When the half-bridge swivel is in the first unbalanced state, the lifting force is applied to the lifting structures on both sides of the first measuring point and the second measuring point in the first direction in sequence, and the P1-△1 curve and the P2-△2 curve are fitted. The P1 value at the mutation point of △1 and △2 is P 1变、 P2 value is P 2变 , where the first direction is longitudinal or transverse, P1 and P2 are the total lifting forces of the lifting mechanism on both sides of the first and second measuring points respectively, △ 1、 △2 is the reading of the laser displacement meter when the lifting force is applied to the lifting structures on both sides of the first measuring point and the second measuring point at the same time and in stages; When the half-bridge swivel is in the second unbalanced state, the lifting structures on both sides of the measuring point close to the tipping point in the first direction simultaneously apply lifting forces in stages, and the fitting P 升 -△ 升 Curve, pick △ 升 P at the mutation point 升 The value is P 升变 , where P 升 is the total lifting force of the lifting mechanisms on both sides of the measuring point, △ 升 is the reading of the laser displacement meter when the lifting force is applied to the lifting structures on both sides of the measuring point at the same time; then the lifting structures on both sides of the measuring point are lowered at the same time, and the fitting P 落 -△ 落 curve, pick up P at the mutation point 落 The value is P 落变 , where P 落 is the total drop force of the jacking mechanism on both sides of the measuring point, △ 落 The reading of the laser displacement meter when the jacking structures on both sides of the measuring point are simultaneously and graded to fall down; When the half-bridge swivel is in the first unbalanced state, the unbalanced torque, friction torque, static friction coefficient, eccentricity and counterweight weight are calculated by changing P1 and P2; when the half-bridge swivel is in the second unbalanced state, the unbalanced torque, friction torque, static friction coefficient, eccentricity and counterweight weight are calculated by changing P1 and P2. 升变 、P 落变 Calculate unbalanced torque, friction torque, static friction coefficient, eccentricity and counterweight weight; Balance weight according to the weight of the counterweight.

6. The counterweight method for a wide rotating bridge according to claim 5, characterized in that: Said P 1变 、P 2变 The formulas for calculating unbalanced torque, friction torque, eccentricity, static friction coefficient and counterweight weight are: M Z =(P 2变 ×L2+ P 1变 ×L1) / 2, M G =(P 2变 ×L2- P 1变 ×L1) / 2, e= M G / N, m Z = M Z / 0.98RN, N1=(N×e) / L, Among them, M Z is the unbalanced moment in the first direction, M G is the friction torque in the first direction, e is the eccentricity in the first direction, μ Z is the static friction coefficient in the first direction, N1 is the weight of the counterweight in the first direction, L2 is the distance between the center of the resultant force of the jacking structure on both sides of the second measuring point and the transverse axis of the bridge parallel to the first direction, L1 is the distance between the center of the resultant force of the jacking structure on both sides of the first measuring point and the transverse axis of the bridge parallel to the first direction, N is the weight of the half-bridge swivel, R is the spherical radius of the swivel ball joint structure, and L is the distance between the center of the counterweight in the first direction and the center of rotation.

7. The counterweight method for a wide rotating bridge according to claim 5, characterized in that: Said P 升变 、P 落变 The formulas for calculating unbalanced torque, friction torque, eccentricity, static friction coefficient and counterweight weight are: M Z =(P 升变 ×L3+ P 落变 ×L3) / 2, M G =(P 升变 ×L3- P 落变 ×L3) / 2, e= M G / N, m Z = M Z / 0.98RN, N1=(N×e) / L, Among them, M Z is the unbalanced moment in the first direction, M G is the friction torque in the first direction, e is the eccentricity in the first direction, μ Z is the static friction coefficient in the first direction, N1 is the weight of the counterweight in the first direction, L3 is the distance between the center of the resultant force of the jacking structure on both sides of the measuring point close to the dumping point in the first direction and the horizontal axis of the bridge parallel to the first direction, N is the weight of the half-bridge swivel, R is the spherical radius of the swivel ball joint structure, and L is the distance between the center of the counterweight in the first direction and the center of rotation.

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