Mounting bracket of laser displacement meter and counterweight method of wide swivel bridge

Abstract

The invention discloses an installation support of a laser displacement meter and a counterweight method of a wide swivel bridge, belongs to the technical field of installation supports, and can solve the problems that an existing laser displacement meter is low in leveling speed, poor in effect and extremely inconvenient in height adjustment. The mounting bracket comprises an abutting plate, a telescopic frame, a leveling plate, a rotating structure, a fixing structure and a height adjusting structure; one face of the abutting plate is matched with the side face of an upper rotating disc of the rotating body spherical hinge structure. The two ends of the telescopic frame are connected with the abutting plate and the leveling plate correspondingly. 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, the height adjusting structure is configured to adjust the height of the laser displacement meter, and after the height adjusting structure freely rotates relative to the leveling plate under the action of gravity till the laser displacement meter is leveled, the fixing structure fixes the rotating structure. The laser displacement meter leveling speed is high, the effect is good, and height adjustment is convenient.

Description

Technical Field

[0001] The present application relates to the technical field of mounting brackets, and in particular to a mounting bracket for a laser displacement meter and a weight-balancing method for a wide-width rotating bridge. Background Art

[0002] Bridge rotation construction is a new type of bridge-building technology, which has the advantages of being able to utilize terrain, convenient prefabrication, no impact on traffic, less construction equipment, simple installation, and saving construction materials. At present, many cross-rail and cross-road bridges use bridge rotation construction technology. It is to prefabricate half of the bridge on both sides of the river or the two sides of the line using terrain and simple brackets, and then use the bridge structure itself as the rotating body. It uses the lower rotating ball joint structure and the subsequent continuous jack rotation construction to rotate the two half bridges at an angle or parallel to the bridge axis and close them into a bridge.

[0003] During the construction of bridge rotation, the displacement monitoring of the rotating ball joint structure is crucial for rotation weighing and beam deflection control. At present, the displacement monitoring of the rotating ball joint structure is to stick the laser displacement meter on the rotating ball joint structure and then manually level the laser displacement meter. The leveling speed is slow and the effect is poor. This method is also subject to vibration and position changes during the rotation process, which will lead to unstable and inaccurate measurement results. Moreover, the height adjustment of the laser displacement meter is extremely inconvenient.

[0004] In addition, in the vertical plane along the beam axis of the rotating bridge, due to the manufacturing and installation errors of the rotating support system, the difference in the mass distribution of the beam body, and the difference in the degree of prestressing, the mass distribution and stiffness of the cantilever beam sections on both sides of the pier may be different, thus generating unbalanced moments. Before the rotation, the unbalanced moment problem caused by eccentricity must be solved, so that after the construction support is completely removed and during the rotation process, the rotating body works under self-balance or counterweight balance, which plays a vital role in the safety of the construction process. In order to ensure the smooth rotation of the bridge and provide a basis for the command and decision-making of the bridge rotation stage, it is necessary to carry out a rotating body weighing test before the rotation, test the unbalanced parameters of the rotating body part, and balance the weight accordingly. However, due to the poor leveling effect of the existing laser displacement meter, the counterweight is inaccurate. Summary of the invention

[0005] The embodiments of the present application provide a mounting bracket for a laser displacement meter and a counterweight method for a wide-width rotating bridge, which can solve the problems of slow leveling speed, poor effect, instability, inaccuracy and extremely inconvenient height adjustment of existing laser displacement meters.

[0006] An embodiment of the present invention provides a mounting bracket for a laser displacement meter, comprising a support plate, a telescopic frame, an adjustment plate, a rotating structure, a fixed structure and a height adjustment structure; one side of the support plate is adapted to the side surface of an upper turntable of a swivel ball joint structure; both ends of the telescopic frame are respectively connected to the support plate and the adjustment plate; the rotating structure is respectively fixedly connected to the adjustment plate and the height adjustment structure so that the adjustment plate and the height adjustment structure can rotate freely relative to each other; 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, and 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 fixed structure fixes the rotating structure.

[0007] In a first aspect, in a possible implementation, 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; and the outer ring of the bearing is fixed to the height adjustment structure.

[0008] In a first aspect, in a possible implementation, the rotating structure further includes 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 first aspect, in a possible implementation, the fixing structure includes a bolt; the bolt is passed through the top of the adjustment plate, and when the bolt is turned, the front end of the bolt can be against or away from the groove ring.

[0010] In the first aspect, in a possible implementation, the fixing structure also includes a sleeve, a fan ring block and a gasket; 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 gasket is arranged in the sleeve; and the front end of the bolt is arranged in the sleeve.

[0011] In the first aspect, in a possible implementation, the height adjustment structure includes a long board, a guide rail and a slide board; the guide rails are respectively arranged on both sides of the long board; guide grooves are arranged on both sides of the slide board, and the guide grooves are slidably arranged on the guide rails at corresponding positions; the rotating structure is fixedly connected to the slide board, and the laser displacement meter is arranged on the long board.

[0012] In a first aspect, in a possible implementation, 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.

[0013] In a second aspect, another embodiment of the present invention provides a weight counterweight method for a wide-width rotating bridge, based on the mounting bracket of the laser displacement meter described in any one of the above items, 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 removed, a jacking structure is respectively arranged on both sides of each measuring point, a mounting bracket is set up at a position corresponding to 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 arranged on the height adjustment structure of each mounting bracket;

[0016] After the sand box is removed, the laser displacement meter is started and the reading is obtained, and the half-bridge swivel is judged to be in the first unbalanced state or the second unbalanced state by the reading, wherein the first unbalanced state is that the friction torque is greater than the unbalanced torque, and the reading displayed by the laser displacement meter does not change much, and the second unbalanced state is that the friction torque is less than the unbalanced torque, and the reading displayed by 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 mechanisms 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 up △ 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, △ 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 and in stages; then the lifting structures on both sides of the measuring point are lowered at the same time and in stages, 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 lifting 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 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;

[0020] Counterweight according to the counterweight weight.

[0021] In a second aspect, in a possible implementation, the P 1变 , P 2变 The formula for calculating the unbalanced moment, friction moment, eccentricity, static friction coefficient and counterweight weight is:

[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] 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 horizontal 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 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 from the center of the counterweight in the first direction to the center of rotation.

[0028] In a second aspect, in a possible implementation, the P 升变 , P 落变 The formula for calculating the unbalanced moment, friction moment, eccentricity, static friction coefficient and counterweight weight is:

[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 / 0.98RN,

[0033] N1=(N×e) / L,

[0034] 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 from the center of the counterweight in the first direction to the center of rotation.

[0035] One or more technical solutions provided in the embodiments of the present invention 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 butt plate adapted to the upper turntable surface of the swivel ball joint structure. When installing the laser displacement meter, the side of the butt plate adapted to the upper turntable surface 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 butt 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, so that the telescopic frame can adjust the relative distance between the laser displacement meter and the butt 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. Since 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. After the butt plate is bonded to the swivel ball joint structure, the height adjustment structure is affected by gravity and rotates relative to the adjustment plate, 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. Then the fixed 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 realize automatic calibration and leveling under different positions and terrain conditions to ensure the precision and accuracy of the displacement measurement, which is not subject to vibration and position changes during the rotation process, and the measurement results are stable and accurate. Since the laser displacement meter has a good leveling effect, 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 accompanying drawings required for use in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings in the following description are some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0038] Figure 1 A schematic diagram of the structure of a mounting bracket for a laser displacement meter provided in 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 the embodiment of the present application;

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

[0041] Figure 4 A schematic diagram of the structure of the wide-width rotating bridge provided in the embodiment of the present application when the counterweight method is implemented Figure 2 .

[0042] Icons: A-installation bracket; 1-back plate; 2-telescopic frame; 21-telescopic rod; 3-adjusting plate; 4-rotating structure; 41-spindle; 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 board; 62-guide rail; 63-slide plate; 64-placing frame; B-laser displacement meter; C-swivel ball joint structure; C1-upper turntable; C2-lower turntable; D-upper bearing platform; E-lower bearing platform; F-support foot; G-measuring point; H-jacking structure; I-bridge pier. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] In the description of the embodiments of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limitations on the present invention. The terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. In addition, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present invention can be understood according to the specific circumstances.

[0045] Please refer to Figure 1 and Figure 2 As shown, an embodiment of the present invention provides a mounting bracket A for a laser displacement meter B, including a support plate 1, a telescopic frame 2, an adjustment plate 3, a rotating structure 4, a fixed structure 5, and a height adjustment structure 6. One side of the support plate 1 is matched with the side of the upper turntable C1 of the swivel ball joint structure C. The support plate 1 has a certain curvature, and the side of the support plate 1 that is matched with the surface of the swivel ball joint structure C is bonded to the swivel ball joint structure C, and the adhesive generally uses a high-performance epoxy resin.

[0046] The two ends of the telescopic frame 2 are respectively connected to the abutment plate 1 and the adjustment plate 3. The telescopic frame 2 can adjust its own length by its own telescopic movement, 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 respectively connected to the adjusting plate 3 and the height adjustment structure 6, so that the adjusting plate 3 and the height adjustment structure 6 can rotate freely relative to each other. The laser displacement meter B is arranged on the height adjustment structure 6, and the height adjustment structure 6 is configured to adjust the height of the laser displacement meter B and the abutment plate 1. When the height adjustment structure 6 is freely rotated relative to the adjusting plate 3 by gravity until the laser displacement meter B is leveled, the fixing structure 5 fixes the rotating structure 4.

[0048] The mounting bracket A of the laser displacement meter B provided in the embodiment of the present application has one side of the butt plate 1 adapted to the surface of the upper turntable C1 of the swivel ball joint structure C. When installing the laser displacement meter B, the side of the butt plate 1 adapted to the surface of the upper turntable C1 of the swivel ball joint structure C is adhered to the swivel ball joint structure C. The two ends of the telescopic frame 2 are respectively connected to the butt plate 1 and the adjustment plate 3. The rotating structure 4 respectively fixes the adjustment plate 3 and the height adjustment structure 6, and the laser displacement meter B is arranged on the height adjustment structure 6, so that the telescopic frame 2 can adjust the relative distance between the laser displacement meter B and the butt plate 1, so that during actual measurement, the laser displacement meter B can measure the displacement change of the upper turntable C1 of the swivel ball joint structure C. Since the rotating structure 4 is connected to the adjustment plate 3 and the height adjustment structure 6 respectively, the adjustment plate 3 and the height adjustment structure 6 can rotate relatively freely. After the abutment plate 1 is bonded to the swivel ball joint structure C, the height adjustment structure 6 is subjected to the gravity and rotates relative to the adjustment plate 3, so that the laser displacement meter B set on the height adjustment structure 6 can be automatically leveled, so that the laser displacement meter B and the swivel ball joint structure C remain in a vertical state, improving the accuracy of the measurement, and then the fixed structure 5 fixes the rotating structure 4. The present application can level the laser displacement meter B according to the gravity, and the leveling speed is fast and the effect is good. The laser displacement meter B is located on the height adjustment structure 6, and 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 maintained at a suitable height for effective measurement and monitoring, and the height adjustment is convenient. The setting of the telescopic frame 2 and the height adjustment structure 6 can enable the laser displacement meter B to achieve automatic calibration and leveling under different positions and terrain conditions to ensure the precision and accuracy of the displacement measurement, without being subject to vibration and position changes during the rotation process, and the measurement results are stable and accurate. Since the laser displacement meter B has a better leveling effect, the counterweight can be made more accurate.

[0049] The mounting bracket A provided in the embodiment of the present application enables the laser displacement meter B to be leveled under different positions and terrain conditions to ensure the precision and accuracy of the measurement of the laser displacement meter B. The vibration and position change of the swivel ball joint structure C during the rotation process will not affect the laser displacement meter B, and will not affect the stability and accuracy of its measurement results. The present application reduces the need for manual intervention and adjustment, reduces labor costs and construction cycles, and thus reduces construction costs. The mounting bracket A of the laser displacement meter B with automatic leveling and controllable height functions can realize intelligent and automated displacement monitoring during the rotation process, improve the efficiency and accuracy of the bridge rotation construction, and improve construction efficiency. The device design scheme with automatic leveling and controllable height functions can reduce the need for manual intervention and adjustment, reduce labor costs and construction cycles, thereby optimizing the cost-effectiveness of construction and optimizing construction costs. The embodiment of the present application can solve the problem of displacement monitoring in bridge rotation construction, improve the prospects and market competitiveness of the technology, and enhance the prospects for technology application.

[0050] like Figure 2 As shown, the rotating structure 4 includes a bearing 42 and a main shaft 41. The inner ring of the bearing 42 is fixed on the main shaft 41. The main shaft 41 is fixed on the adjustment plate 3. The outer ring of the bearing 42 is fixed to the height adjustment structure 6, so that the height adjustment structure 6 is subjected to the action of gravity, and the outer ring of the bearing 42 rotates relative to the inner ring, so that the height adjustment structure 6 rotates relative to the adjustment plate 3, and finally the laser displacement meter B rotates relative to the plate 1, so as to achieve the leveling of the laser displacement meter B. The outer ring of the bearing 42 and the height adjustment structure 6 are generally fixed by bonding, and the adhesive generally uses a high-performance epoxy resin. The rotating structure 4 of the present application is easy to implement and has a good rotation effect.

[0051] Among them, the bearing 42 can be purchased or prepared by itself. First, the 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 circular 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 to set the rolling ball. The steel pipe material adopts GCr15 alloy steel with high hardness and high wear resistance. The processed inner and outer rings need to be heat treated to improve their hardness and wear resistance. The rolling ball is a key component that plays a supporting and rotating role in the bearing 42 and is made of high-precision steel balls. A support frame is set between the rolling balls. The end face of the inner ring is provided with an outer edge, and the end face of the outer ring is provided with an inner edge to fix the rolling ball between the inner ring and the outer ring.

[0052] Continue to refer to Figure 2As shown, the rotating structure 4 also includes a rubber ring 43 and a groove ring 44. The cross section 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 fixed structure 5 to help fix the fixed structure 5. The rubber ring 43 is made of high-roughness rubber material. The adhesive is preferably a high-performance epoxy resin.

[0053] Further, continue as Figure 2 As shown, the fixing structure 5 includes a bolt 51. The bolt 51 is passed through the top of the adjustment plate 3. When the bolt 51 is turned, the front end of the bolt 51 can abut against or move away from the groove ring 44. Generally, the front end of the bolt 51 is away from the groove ring 44. When the bearing 42 needs to be fixed, the bolt 51 is turned, and the front end of the bolt 51 abuts against the groove ring 44, so that the bearing 42 can be fixed, and then the height adjustment structure 6 can be fixed.

[0054] Optionally, the fixing structure 5 also includes a sleeve 52, a fan ring block 53 and a gasket. 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 gasket is arranged in the sleeve 52. The front end of the bolt 51 is arranged in the sleeve 52. When the height adjustment structure 6 rotates, the fan ring block 53, the gasket, the sleeve 52 and the bolt 51 are relatively loose relative to 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 turned, the bolt 51 presses the gasket, the gasket presses the fan ring block 53, and the fan ring block 53 presses against the groove ring 44 to fix the outer ring of the bearing 42. The setting of the fan ring block 53 increases the contact area between the fixing structure 5 and the groove ring 44, and the friction force provided by the fixing structure 5 is greater, so that the fixing effect is better. The groove ring 44 and the sleeve 52 work together to limit the position of the sector ring block 53.

[0055] like Figure 1As shown, the height adjustment structure 6 includes a long plate 61, a guide rail 62 and a slide plate 63. The guide rails 62 are respectively arranged on both sides of the long plate 61. Guide grooves are arranged on both sides of the slide plate 63, and the guide grooves are slidably arranged on the guide rails 62 at corresponding positions. The rotating structure 4 is fixedly connected to the slide plate 63, and the laser displacement meter B is arranged on the long plate 61, so that when the slide plate 63 slides relatively along the guide rail 62, it can drive the abutment plate 1, the telescopic frame 2, the adjustment plate 3, the rotating structure 4 and the fixed structure 5 connected to the slide plate 63 to slide relative to the long plate 61, thereby adjusting the relative height of the swivel ball joint structure C connected to the abutment plate 1 and the laser displacement meter B. The height adjustment structure 6 provided in the embodiment of the present application has a simple structure and is easy to implement, and can realize the sliding of the abutment plate 1 relative to the laser displacement meter B. Of course, the guide rail 62 can be a screw, and the guide groove is provided with an internal thread. By driving the screw to rotate by a motor, the sliding control of the slide plate 63 relative to the long plate 61 and the fixation between the slide plate 63 and the long plate 61 can be realized.

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

[0057] Optionally, the height adjustment structure 6 may also include an electric slide. One end of the slide rail of the electric slide is fixedly connected to the rotating structure 4. The laser displacement meter B is arranged on the supporting platform of the electric slide. The electric slide can achieve millimeter-level positioning accuracy, has excellent stability and reliability, strong adaptability, can be intelligently controlled, has excellent anti-interference ability, and can operate stably in complex industrial environments. The height adjustment structure 6 of the embodiment of the present application adopts an electric slide, which can realize the sliding of the laser displacement meter B relative to the abutment plate 1, so that the height adjustment of the laser displacement meter B is automated, and there is no need for personnel to adjust the height of the laser displacement meter B on site during work.

[0058] Continue to refer to Figure 1 As shown, the telescopic frame 2 includes four telescopic rods 21. One end of the four telescopic rods 21 is respectively fixed to the four corners of the adjustment plate 3 by bolts 51, and the other end is respectively fixed to the abutment plate 1. Figure 1 As shown, the other ends of the four telescopic rods 21 are fixed to the upper and lower sides of the support plate 1 by bolts 51. The telescopic frame 2 includes four telescopic rods 21, which can firmly fix the adjustment plate 3 and the support plate 1, and can reduce the weight of the mounting bracket A. The four telescopic rods 21 have a stable structure and a good stabilizing effect. The four telescopic rods 21 can adjust their own lengths by their own telescopic extension, so that the laser displacement meter B installed on the mounting bracket A can adapt to displacement monitoring in different environments.

[0059] For a wide rotating bridge, a weighing test in the horizontal and vertical directions is required. Another embodiment of the present invention provides a weight balancing method for a wide rotating bridge, based on the mounting bracket A of the laser displacement meter B, including steps 1 to 6:

[0060] Step 1: Select two measuring points G on both sides of the swivel ball joint structure C along the longitudinal and transverse directions. The measuring points G are at the corresponding positions of the support legs F. Figure 3 As shown, the direction indicated by the arrow is the road travel direction, that is, the longitudinal direction, and the direction perpendicular to the longitudinal direction is the transverse direction. Two measuring points G are selected on both sides of the swivel ball joint structure C along the longitudinal direction, namely Figure 3 The measuring points G1 and G2 in the figure are selected from two measuring points G on both sides of the swivel ball joint structure C along the horizontal direction, namely Figure 3 Measuring points G3 and G4 in .

[0061] Step 2: Before removing the sand box, set up a lifting structure H on both sides of each measuring point G. Figure 3 As shown, lifting mechanisms H1-1 and H1-2 are respectively set on both sides of measuring point G1, lifting mechanisms H2-1 and H2-2 are respectively set on both sides of measuring point G2, lifting mechanisms H3-1 and H3-2 are respectively set on both sides of measuring point G3, and lifting mechanisms H4-1 and H4-2 are respectively set on both sides of measuring point G4.

[0062] like Figure 4 As shown, the upper side of the swivel ball joint structure C is the upper turntable C1, the lower side is the lower turntable C2, the upper part of the upper turntable C1 is the upper pedestal D, the upper part of the upper pedestal D is the bridge pier I, and the lower part of the lower turntable C2 is the lower pedestal E.

[0063] A mounting bracket A is set up at a position corresponding to the measuring point G so that the abutment plate 1 of the mounting bracket A is attached to the side of the upper turntable C1 of the swivel ball joint structure C, and a laser displacement meter B is set on the height adjustment structure 6 of each mounting bracket A.

[0064] Step 3: After the sand box is removed, start the laser displacement meter B and obtain the reading. Due to the unbalanced torque, the support leg F on one side falls to the ground. It is assumed that the support leg F between the measuring point G2 and the measuring point G3 falls to the ground. The reading is used to determine whether the half-bridge swivel is in the first unbalanced state or the second unbalanced state. The first unbalanced state is when the friction torque is greater than the unbalanced torque. The reading displayed by the laser displacement meter B does not change much. At this time, the sand box and other constraints are removed, and the wide-width swivel bridge is still in a balanced state. The second unbalanced state is when the friction torque is less than the unbalanced torque. The reading displayed by the laser displacement meter B becomes smaller on the side where the center of gravity is located and larger on the other side. At this time, the sand box and other constraints are removed, and the wide-width swivel bridge tilts to the side where the center of gravity is biased until part of the support leg F on that side contacts the slideway.

[0065] Step 4: When the half-bridge swivel is in the first unbalanced state, the lifting force is applied to the lifting structures H on both sides of the first measuring point and the second measuring point in the first direction in stages (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), and the P1-△1 curve and the P2-△2 curve are fitted, and the P1 value at the mutation point of △1 and △2 is picked 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, and 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 measuring point and the second measuring point 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 swivel 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 up △ 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 jacking force of the lifting mechanism on both sides of the measuring point G, △ 落 It is the reading of the laser displacement meter B when the lifting structures H on both sides of the measuring point G are simultaneously and graded to fall to the top.

[0067] Step 5: 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. 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×E) / L,

[0073] 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 H on both sides of the second measuring point G2 and the horizontal axis of the bridge parallel to the first direction (when the first direction is longitudinal, the horizontal axis of the bridge parallel to the first direction is Figure 3 When the first direction is horizontal, the horizontal axis of the bridge parallel to the first direction is Figure 3 ), L1 is the distance between the center of the resultant force of the jacking structure H on both sides of the first measuring point G1 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 C, and L is the distance from the center of the counterweight in the first direction to the center of rotation.

[0074] When the half-bridge is in the second unbalanced state, 升变 , P 落变 The formula for calculating the unbalanced moment, friction moment, static friction coefficient, eccentricity and counterweight weight is:

[0075] M Z =(P 升变 ×L3+P 落变 ×L3) / 2,

[0076] M G =(P 升变 ×L3-P 落变 ×L3) / 2,

[0077] E=M G / N,

[0078] μ Z =M Z / 0.98RN,

[0079] N1=(N×E) / L,

[0080] 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 Zis 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 H on both sides of the measuring point G 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 C, and L is the distance from the center of the counterweight in the first direction to the center of rotation.

[0081] Step 6: Balance weight according to the weight.

[0082] The counterweight method for a wide rotating bridge provided in the embodiment of the present application installs the laser displacement meter B through the mounting bracket A of the laser displacement meter B, and can realize automatic calibration and leveling of the laser displacement meter B under different positions and terrain conditions to ensure the precision and accuracy of displacement measurement, which is not subject to vibration and position changes during the rotation process, and the measurement results are stable and accurate. Since the leveling effect of the laser displacement meter B is better, the counterweight is accurate. It can realize automatic data reading and judgment of mutation points, and realize fully automatic data collection and information analysis without manual operation.

[0083] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other. Each embodiment focuses on the differences from other embodiments.

[0084] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit the present application. Although the present application has been described in detail with reference to the aforementioned embodiments, a person of ordinary skill in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some or all of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the present 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 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 adjustment plate under the action of gravity until the laser displacement meter is leveled, the fixed structure fixes the rotating structure.

2. The mounting bracket of the laser displacement meter according to claim 1, characterized in that: 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.

3. The mounting bracket of the laser displacement meter according to claim 2, 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.

4. The mounting bracket of the laser displacement meter according to claim 3, characterized in that: The fixing structure includes bolts; 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.

5. The mounting bracket of the laser displacement meter according to claim 4, characterized in that: The fixing structure also includes a sleeve, a sector ring block and a cushion 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 cushion block is arranged in the sleeve; The front end of the bolt is arranged in the sleeve.

6. The mounting bracket of the laser displacement meter according to claim 1, characterized in that: Height adjustment structures include longboards, rails, and slides; Guide rails are provided on both sides of the long board; Guide grooves are arranged on both sides of the slide plate, 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.

7. The mounting bracket of the laser displacement meter according to claim 1, characterized in that: The telescopic frame includes four telescopic rods; One ends of the four telescopic rods are respectively fixed to the four corners of the adjustment plate, and the other ends are respectively fixed to the abutment plates.

8. A weight-balancing 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 7 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 removed, a jacking structure is respectively arranged on both sides of each measuring point, a mounting bracket is set up at a position corresponding to 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 arranged on the height adjustment structure of each mounting bracket; After the sand box is removed, the laser displacement meter is started and the reading is obtained, and the half-bridge swivel is judged to be in the first unbalanced state or the second unbalanced state by the reading, wherein the first unbalanced state is that the friction torque is greater than the unbalanced torque, and the reading displayed by the laser displacement meter does not change much, and the second unbalanced state is that the friction torque is less than the unbalanced torque, and the reading displayed by 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 mechanisms 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 up △ 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, △ 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 and in stages; then the lifting structures on both sides of the measuring point are lowered at the same time and in stages, 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 lifting 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; Counterweight according to the counterweight weight.

9. The weight-balancing method for a wide rotating bridge according to claim 8, characterized in that: Said 1变 , P 2变 The formula for calculating the unbalanced moment, friction moment, eccentricity, static friction coefficient and counterweight weight is: 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 horizontal 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 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 from the center of the counterweight in the first direction to the center of rotation.

10. The weight-balancing method for a wide rotating bridge according to claim 8, characterized in that: Said 升变 , P 落变 The formula for calculating the unbalanced moment, friction moment, eccentricity, static friction coefficient and counterweight weight is: 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 from the center of the counterweight in the first direction to the center of rotation.

Images