CN120440780A - Stress deformation monitoring system and method for integral hoisting of large-span steel structures - Google Patents
Stress deformation monitoring system and method for integral hoisting of large-span steel structuresInfo
- Publication number
- CN120440780A CN120440780A CN202510933148.9A CN202510933148A CN120440780A CN 120440780 A CN120440780 A CN 120440780A CN 202510933148 A CN202510933148 A CN 202510933148A CN 120440780 A CN120440780 A CN 120440780A
- Authority
- CN
- China
- Prior art keywords
- oil
- steel structure
- rod
- hoisting
- lifting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Control And Safety Of Cranes (AREA)
Abstract
本发明涉及钢结构整体吊装受力变形监测技术领域，尤其为用于大跨度钢结构整体吊装的受力形变监测系统及方法，起重吊具通过左吊绳和右吊绳与钢结构上的吊点相连接实现吊装，左吊绳和右吊绳的上侧均被伸缩油筒打断并连接，伸缩油筒包括油柱，油柱的内侧滑动连接有活塞，活塞的顶端固定连接有内柱，内柱的外侧与油柱的顶端内侧滑动连接，活塞的上下两侧分别是上油室和下油室，两个下油室之间通过软油管相连通，两个上油室均通过软油管与识别箱连通，本发明能够有效提醒和避免偏心荷载，并起到感应钢结构的整体和局部形变的作用，通过在左吊绳和右吊绳的上侧进行设置，在吊装过程中，将左吊绳和右吊绳承受的负载通过油杆的滑动进行比对展示。
The present invention relates to the technical field of stress and deformation monitoring for overall lifting of steel structures, in particular to a stress and deformation monitoring system and method for overall lifting of large-span steel structures, wherein the lifting device is connected to the lifting point on the steel structure by a left lifting rope and a right lifting rope to realize lifting, the upper sides of the left lifting rope and the right lifting rope are both interrupted and connected by a telescopic oil cylinder, the telescopic oil cylinder comprises an oil column, the inner side of the oil column is slidably connected to a piston, the top end of the piston is fixedly connected to an inner column, the outer side of the inner column is slidably connected to the inner side of the top end of the oil column, the upper and lower sides of the piston are respectively an upper oil chamber and a lower oil chamber, the two lower oil chambers are connected by a soft oil pipe, and the two upper oil chambers are connected to an identification box by a soft oil pipe. The present invention can effectively remind and avoid eccentric loads, and plays a role in sensing the overall and local deformation of the steel structure, and is arranged on the upper sides of the left lifting rope and the right lifting rope. During the lifting process, the loads borne by the left lifting rope and the right lifting rope are compared and displayed through the sliding of the oil rod.
Description
Technical Field
The invention relates to the technical field of monitoring of stress deformation of integral hoisting of a steel structure, in particular to a system and a method for monitoring the stress deformation of integral hoisting of a large-span steel structure.
Background
The steel structure is widely applied to various buildings since the advent of various advantages such as excellent stress performance, light weight, high strength, stable performance, good weldability, convenient connection, simple and convenient manufacture, short construction period and the like.
In order to improve the safety of the structure and reduce the overhead workload, the installation and construction are generally carried out by adopting an integral hoisting method. The integral hoisting method is a construction method for installing the structure in place by adopting hoisting equipment such as a crane and a crane after the structure is assembled on the ground, and is shown in fig. 1.
In the actual hoisting process, the construction units are often untimely planned due to the hoisting scheme, the hoisting program is controlled improperly, and the like, so that the hoisting structure inevitably bears eccentric load, as shown in fig. 2, and the hoisting process can generate great potential safety hazards due to the eccentric load. Therefore, the stress and deformation of the steel structure building in the normal use stage are considered, and the safety analysis of the construction stage and the hoisting process is also important to consider.
Therefore, the stress deformation monitoring system and the method for integrally hoisting the large-span steel structure are provided for solving the problems, the direction of load eccentricity can be clearly pointed out in the hoisting process through a simple structure, the integral deformation degree of the steel structure is induced, and when the load is excessively eccentric, correction is timely made.
Disclosure of Invention
The invention aims to provide a stress deformation monitoring system and a method for integral hoisting of a large-span steel structure, which can effectively remind and avoid eccentric load and can be used for sensing integral and local deformation of the steel structure.
The invention provides a technical scheme that the stress deformation monitoring system for integrally hoisting a large-span steel structure comprises a hoisting sling, wherein the hoisting sling is connected with hoisting points on the steel structure through a left hoisting rope and a right hoisting rope, the upper sides of the left hoisting rope and the right hoisting rope are broken and connected by a telescopic oil cylinder, the telescopic oil cylinder comprises an oil column, the inner side of the oil column is slidingly connected with a piston, the top end of the piston is fixedly connected with an inner column, the outer side of the inner column is slidingly connected with the inner side of the top end of the oil column, the upper side and the lower side of the piston are respectively an upper oil chamber and a lower oil chamber, the two lower oil chambers are communicated through a soft oil pipe, and the two upper oil chambers are communicated with an identification box through soft oil pipes;
The inside left chamber and the right chamber of including of discernment case, the discernment case is middle solid, the upper oil chamber intercommunication of left side and left side, the upper oil chamber intercommunication of right side in right side, the inboard sliding connection of discernment case has the hob, the both ends fixedly connected with connecting plate of hob, the outside of hob is provided with the second spring, the both ends of second spring respectively with one side of connecting plate and the inside fixed connection in centre of discernment case, when the unbalanced load appears in left lifting rope and right lifting rope arbitrary one side, the hob can appear sliding, gliding distance represents the size of unbalanced load volume, realize the atress monitoring.
The left lifting rope and the right lifting rope which bear the steel structure are monitored, so that the deformation of the steel structure is monitored;
The invention can effectively remind and avoid eccentric load and has the effect of sensing the whole and partial deformation of the steel structure, and the invention is arranged on the upper sides of the left lifting rope and the right lifting rope, in the lifting process, the load born by the left lifting rope and the right lifting rope is compared and displayed through the sliding of the oil rod, in the initial state, the second spring is not in the yielding state, when the unbalanced load appears on any side of the left lifting rope and the right lifting rope, the oil rod can slide, and when the load difference on the two sides is larger, the oil rod can be pushed to move by the load difference because the elastic force provided by the second spring is more compressed or elongated, namely the sliding distance represents the unbalanced load amount, so that the stress monitoring and identification can be realized;
If the load of the right lifting rope is too large, the tension between the oil column on the right lifting rope and the inner column is larger than the tension between the oil column on the left lifting rope and the inner column, at the moment, the oil in the oil chamber on the right side can be extruded to the oil chamber on the other side, so that the oil rod can slide leftwards, unbalanced load monitoring is realized, and the oil in the oil chamber on the corresponding side can be compensated by the oil chamber on the other side;
As the stress deformation monitoring system for integrally hoisting the large-span steel structure, preferably, the middle position of the oil rod is fixedly connected with a second displacement point, the middle position of the identification box is fixedly connected with a second displacement sensor, the second displacement point slides on the second displacement sensor, and the movement direction and the position of the oil rod are obtained by obtaining the position of the second displacement point.
As the stress deformation monitoring system for integrally hoisting the large-span steel structure, preferably, the middle position of the oil rod is solid, the rest positions are hollow, the two middle sides of the oil rod are respectively provided with an outlet, the outlet is shielded by the inside of the identification box at the initial position, after the connecting plate moves to one side to the limit position, the outlet at the same side can emerge from the inside of the identification box, the left cavity and the right cavity are communicated, one side with larger load is provided, oil in the oil feeding chamber at the corresponding side can flow to the oil feeding chamber at the other side, and oil in the oil discharging chamber at the corresponding side can be compensated by the oil discharging chamber at the other side.
The invention can realize the identification of the unbalanced load direction and the unbalanced load quantity, and can also realize the correction of the unbalanced load, when the unbalanced load is overlarge, the unbalanced load is corrected by the length compensation of the left lifting rope and the right lifting rope along with the movement of the oil rod until the connecting plate moves to one side to the limit position and the outlet hole at the same side can emerge from the inside of the identification box, so that the left cavity and the right cavity are communicated;
when the right side is overweight, the left lifting rope is lengthened, so that the gravity center of the steel structure is left-biased, and unbalanced load correction is realized;
as a stress deformation monitoring system for integral hoisting of a large-span steel structure, the outlet holes are preferably arranged in a triangular shape, and the middle position of the oil rod is smaller when the outlet holes are closer to the oil rod.
Under the arrangement, when the outlet hole just emerges from the inside of the identification box, the communication quantity of the outlet hole is smaller, so that slow correction is realized, and excessive fluctuation of a steel structure is avoided;
When the outlet holes quickly and completely emerge from the inside of the identification box, the load difference on the surface is very large, the communication quantity of the outlet holes is quickly increased, the quick correction is realized, and unsafe factors caused by overlarge left and right load differences during hoisting of the steel structure are avoided;
As the atress deformation monitoring system for large-span steel construction integral hoisting, preferably, the inboard slip in the middle of discernment case has the sliding ring, the inboard fixedly connected with electro-magnet of sliding ring, the inboard of sliding ring still has the pin through mount sliding connection, the pin can rely on the electro-magnet to realize flexible from top to bottom, the pin top is made by magnetic material, the bottom is the slope setting, through sliding ring and the flexible from top to bottom of cooperation pin, can insert the pin between the different positions of second spring, change the effective length of acting of second spring, thereby change the stiffness coefficient of the effective function section of second spring in order to adapt to the steel construction of different weight, the sliding range of sliding ring does not exceed the shielding face of apopore.
Under the arrangement, the effective acting length of the second spring is changed by sliding the sliding ring and matching with the up-down expansion of the stop lever, so that the stiffness coefficient of the effective functional section of the second spring is changed, different sensitivities are matched, when the steel structure with larger weight is faced, the sliding ring can be selectively moved to one side far away from the center of the identification box, at the moment, the stiffness coefficient of the effective functional section of the second spring is reduced, the elasticity or the tension of the connecting plate is increased, the sensitivity of unbalanced load identification and correction can be reduced, when the steel structure with smaller weight is faced, the sliding ring can be selectively moved to one side close to the center of the identification box, at the moment, the stiffness coefficient of the effective functional section of the second spring is increased, the elasticity or the tension of the connecting plate is reduced, and the sensitivity of unbalanced load identification and correction can be increased;
As the stress deformation monitoring system for integrally hoisting the large-span steel structure, the motor is fixedly connected to the inner side of the identification box, the screw is fixedly connected to the output end of the motor, the outer side of the screw is in spiral connection with the inner side of the slip ring, and the change of the position of the slip ring is realized through the rotation of the motor.
As the stress deformation monitoring system for integrally hoisting the large-span steel structure, preferably, the top ends of the two inner columns are respectively connected with a distance detection rod through a rotating ball in a rotating way, after the left lifting rope and the right lifting rope are stressed and straightened, the length of the distance detection rods is recorded as the initial length, and in the hoisting and transferring processes, the length change of the distance detection rods can reflect the linear distance change between the two lifting points, so that the integral deflection deformation in the hoisting process of the steel structure is reflected linearly.
In the hoisting process, the steel structure is subjected to the influence of wind load and long-time local stress, and deflection deformation possibly occurs, and the linear distance change between two hoisting points is reflected by detecting the distance change of the left hoisting rope and the right hoisting rope at the upper part, so that the integral deflection deformation in the hoisting process of the steel structure is reflected linearly;
as a stress deformation monitoring system for integrally hoisting a large-span steel structure, preferably, a strain gauge is attached to the lifting point position and the middle position of the steel structure, and is used for obtaining the local deformation of the steel structure, and the data of the strain gauge are sent out through a wireless transmitter.
As the stress deformation monitoring system for integrally hoisting the large-span steel structure, preferably, the distance detection rod comprises an outer rod, the inner side of the outer rod is slidably connected with an inner rod, one end of the inner rod in the outer rod is fixedly connected with a pulley, the inner side of one end of the outer rod is fixedly connected with a pull rope, the lower side of the outer rod is slidably connected with a sliding block through a sliding groove, a first spring is fixedly connected between the sliding block and the inner side of one end of the outer rod, damping force enough to resist the first spring is arranged between the inner rod and the outer rod, and the other end of the pull rope bypasses the pulley and is fixedly connected with the sliding block;
The inside fixedly connected with first displacement point of slider, the inboard fixedly connected with first displacement sensor of bottom of outer pole, first displacement point slides on first displacement sensor, obtains the length variation of distance detection pole through first displacement point, and the setting of movable pulley is used for playing the effect of slider removal increment, ensures the sensitivity of length detection.
Because the distance change of the left lifting rope and the right lifting rope at the upper part is very weak, the moving quantity of the sliding block can be increased through the increment action of the movable pulleys, and the capturing of the length change is facilitated;
the method for monitoring the stress deformation of the integral hoisting of the large-span steel structure comprises the following steps:
Step one, respectively connecting a left lifting rope and a right lifting rope with a lifting point on a steel structure;
step two, after personnel are evacuated to a safe range, the crane starts to operate, and the length change of the distance detection rod can reflect the linear distance change between two lifting points in the lifting and transferring processes, so that the integral deflection deformation in the steel structure lifting process is reflected linearly;
thirdly, the strain gauge attached to the hanging point position and the middle position of the steel structure is used for obtaining local deformation of the steel structure;
Fourthly, when wind load is applied, elasticity of the left lifting rope and elasticity of the right lifting rope are different or gravity of the steel structure are respectively uneven, stress of the left lifting rope and stress of the right lifting rope are different, when unbalanced load occurs on any side of the left lifting rope and any side of the right lifting rope, sliding of the oil rod occurs, the sliding distance represents the magnitude of unbalanced load, and stress monitoring is achieved;
And fifthly, when the unbalanced load in the step four is too large, the connecting plate moves to one side to a limit position, the outlet holes on the same side can emerge from the inside of the identification box, the left cavity and the right cavity are communicated, oil in the oil feeding chamber on the corresponding side can flow to the oil feeding chamber on the other side on the side with larger load, and oil in the oil discharging chamber on the corresponding side can be compensated by the oil discharging chamber on the other side for balancing the load.
Compared with the prior art, the invention has the beneficial effects that:
1. The invention monitors the left lifting rope and the right lifting rope of the bearing steel structure to realize the monitoring of the deformation of the steel structure, wherein the lower oil chamber, the upper oil chamber, the left cavity and the right cavity are filled with hydraulic oil, the invention can effectively remind and avoid eccentric load and has the function of sensing the whole and local deformation of the steel structure, in the hoisting process, the load born by the left lifting rope and the right lifting rope is compared and displayed through the sliding of the oil rod, in the initial state, the second spring is not in a yielding state, when the unbalanced load occurs on any side of the left lifting rope and the right lifting rope, the oil rod can slide, and when the load difference on two sides is larger, the oil rod can be pushed to move due to the fact that the elastic force provided by the second spring is larger due to the fact that the second spring is compressed or elongated, namely, the sliding distance represents the unbalanced load quantity, and stress monitoring and identification are achieved.
2. This a atress deformation monitoring system for large-span steel construction integral hoisting, if when right lifting rope load is too big, the pulling force between oil column and the inner column on the right lifting rope is greater than the pulling force between oil column and the inner column on the left lifting rope, and at this moment, the indoor oil of right side oil feeding can be to the upper oil chamber extrusion of opposite side, makes the hob slide left, realizes the unbalanced load monitoring, and the indoor oil of lower oil of corresponding one side can be compensated by the lower oil chamber of opposite side.
3. According to the stress deformation monitoring system for integrally hoisting the large-span steel structure, the identification of the unbalanced load direction and the unbalanced load capacity can be realized, and the unbalanced load can be corrected, when the unbalanced load is too large, along with the movement of the oil rod until the connecting plate moves to one side to the limit position, the outlet holes on the same side can emerge from the inside of the identification box, the left cavity and the right cavity are communicated, so that the left lifting rope and the right lifting rope are subjected to length compensation, and the unbalanced load is corrected, and when the right side is too heavy, the left lifting rope is lengthened, so that the gravity center of the steel structure is offset left, and the unbalanced load is corrected.
4. This a atress deformation monitoring system for large-span steel construction integral hoisting, the apopore is triangle form setting, and the intermediate position that is close to the oil pole more is less, just after the identification case is inside to the apopore, the intercommunication volume of apopore is less this moment, realizes slow correction, avoids the too big fluctuation of steel construction, after the identification case is inside to quick whole the having of apopore, the surface load difference is very big this moment, the intercommunication volume of apopore increases fast, realizes faster correction, and the load difference is too big about when avoiding steel construction hoist and mount causes unsafe factor.
5. The stress deformation monitoring system for integrally hoisting the large-span steel structure changes the effective acting length of the second spring by sliding the sliding ring and matching with the up-down expansion of the stop lever, so as to change the stiffness coefficient of an effective functional section of the second spring, match different sensitivities, when facing a steel structure with larger weight, the sliding ring can be selectively moved to one side far away from the center of the identification box, at the moment, the stiffness coefficient of the effective functional section of the second spring is reduced, the stiffness coefficient of the effective functional section of the second spring is increased, the elasticity or the tension of a connecting plate is increased, the sensitivity of unbalanced load identification and correction can be reduced, when facing a steel structure with smaller weight, the sliding ring can be selectively moved to one side close to the center of the identification box, at the moment, the effective functional section of the second spring is increased, the stiffness coefficient of the effective functional section of the second spring is reduced, the elasticity or the tension of the connecting plate is reduced, and the sensitivity of unbalanced load identification and correction can be increased.
6. According to the stress deformation monitoring system for integrally hoisting the large-span steel structure, the steel structure is subjected to the influence of wind load and long-time local stress in the hoisting process, and deflection deformation possibly occurs in the steel structure.
7. According to the stress deformation monitoring system for integrally hoisting the large-span steel structure, because the distance change of the left lifting rope and the right lifting rope at the upper part is very weak, the moving quantity of the sliding block can be increased through the increment action of the movable pulleys, the capturing of the length change is facilitated, and the invention is provided with a group of movable pulleys, and a plurality of groups of movable pulleys can be arranged to increase the moving quantity of the sliding block.
Drawings
FIG. 1 is a schematic view of a prior art steel structure in integral hoisting;
FIG. 2 is a schematic diagram of eccentric load during integral hoisting of a prior art steel structure;
FIG. 3 is a schematic view of the steel structure of the present invention in the integral hoisting;
FIG. 4 is a schematic view of the structure of the telescopic oil cylinder and the identification box of the invention;
Fig. 5 is a schematic view showing the internal structure of the identification box in embodiment 1 of the present invention;
FIG. 6 is an enlarged schematic view of the structure of FIG. 5A according to the present invention;
FIG. 7 is a schematic view showing the internal structure of the identification box of the present invention in the initial, identification and correction phases;
FIG. 8 is a schematic view of the appearance and cross-sectional structure of the oil boom of the present invention;
fig. 9 is a schematic view showing the internal structure of an identification box in embodiment 2 of the present invention;
FIG. 10 is an enlarged schematic view of the structure of FIG. 9B according to the present invention;
FIG. 11 is a schematic view showing the internal structure of a distance detecting rod according to embodiment 3 of the present invention;
fig. 12 is an enlarged view of the structure of fig. 11 at C according to the present invention.
In the figure:
1. Lifting slings, a left lifting rope, a right lifting rope, a lifting point, a steel structure, a strain gauge, a telescopic oil cylinder, a distance detection rod and an identification box, wherein the lifting slings comprise a lifting sling, a left lifting rope, a right lifting rope, a lifting point, a steel structure, a strain gauge, a telescopic oil cylinder, a distance detection rod and an identification box;
71. oil column 72, piston 73, lower oil chamber 74, upper oil chamber 75, inner column;
81. outer rod, 82, inner rod, 83, stay cord, 84, first spring, 85, first displacement sensor, 86, slide block, 87, first displacement point, 88, rotating ball, 89, pulley;
91. Left cavity, 92, right cavity, 93, connecting plate, 94, oil rod, 95, second spring, 96, second displacement sensor, 97, second displacement point, 98, outlet hole, 99, motor, 910, screw, 911, slip ring, 912, stop lever, 913, electromagnet, 914 and fixing frame.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 3-8, the invention provides a technical scheme, which is used for a stress deformation monitoring system for integrally hoisting a large-span steel structure, and comprises a hoisting sling 1, wherein the hoisting sling 1 is connected with a hoisting point 4 on a steel structure 5 through a left hoisting rope 2 and a right hoisting rope 3, the upper sides of the left hoisting rope 2 and the right hoisting rope 3 are both broken and connected by a telescopic oil cylinder 7, the telescopic oil cylinder 7 comprises an oil column 71, the inner side of the oil column 71 is slidingly connected with a piston 72, the top end of the piston 72 is fixedly connected with an inner column 75, the outer side of the inner column 75 is slidingly connected with the inner side of the top end of the oil column 71, the upper side and the lower side of the piston 72 are respectively an upper oil chamber 74 and a lower oil chamber 73, the two lower oil chambers 73 are communicated with each other through a flexible oil pipe, and the two upper oil chambers 74 are communicated with an identification box 9 through flexible oil pipes;
the inboard left chamber 91 and right chamber 92 that include of discernment case 9, the centre of discernment case 9 is solid, the upper oil chamber 74 intercommunication of left side in left chamber 91, the upper oil chamber 74 intercommunication of right side in right side chamber 92, the inboard sliding connection of discernment case 9 has the oil pole 94, the both ends fixedly connected with connecting plate 93 of oil pole 94, the outside of oil pole 94 is provided with second spring 95, the both ends of second spring 95 respectively with one side of connecting plate 93 and the inboard fixed connection in the centre of discernment case 9, when the unbalanced load appears in left lifting rope 2 and right lifting rope 3 arbitrary one side, the oil pole 94 can appear sliding, the gliding distance represents the size of unbalanced load volume, realize the atress monitoring.
The left lifting rope 2 and the right lifting rope 3 for bearing the steel structure 5 are monitored, so that the deformation of the steel structure 5 is monitored;
The invention can effectively remind and avoid eccentric load and plays a role of sensing the whole and partial deformation of a steel structure, and the invention is arranged on the upper sides of the left lifting rope 2 and the right lifting rope 3, in the lifting process, the load born by the left lifting rope 2 and the right lifting rope 3 is compared and displayed through the sliding of the oil rod 94, in the initial state, the second spring 95 is not in the yielding state, when the unbalanced load occurs on any side of the left lifting rope 2 and the right lifting rope 3, the oil rod 94 slides, and when the load difference on the two sides is larger, the oil rod 94 can be pushed to move due to the fact that the larger the elastic force provided by the second spring 95 is compressed or elongated, namely the sliding distance represents the size of the unbalanced load, so that the stress monitoring and identification are realized;
If the load of the right lifting rope 3 is too large, the tension between the oil column 71 and the inner column 75 on the right lifting rope 3 is larger than the tension between the oil column 71 and the inner column 75 on the left lifting rope 2, at this time, the oil in the right upper oil chamber 74 can be extruded to the upper oil chamber 74 on the other side, so that the oil rod 94 slides leftwards, unbalanced load monitoring is realized, and the oil in the lower oil chamber 73 on the corresponding side can be compensated by the lower oil chamber 73 on the other side;
Specifically, the middle position of the oil rod 94 is fixedly connected with a second displacement point 97, the middle position of the identification box 9 is fixedly connected with a second displacement sensor 96, the second displacement point 97 slides on the second displacement sensor 96, and the movement direction and the position of the oil rod 94 are obtained by obtaining the position of the second displacement point 97.
Specifically, the middle position of the oil rod 94 is solid, the rest positions are hollow, the two middle sides of the oil rod 94 are respectively provided with an outlet hole 98, under the initial position, the outlet holes 98 are shielded by the inside of the identification box 9, after the connecting plate 93 moves to one side to the limit position, the outlet holes 98 on the same side can emerge from the inside of the identification box 9, the left cavity 91 and the right cavity 92 are communicated, the oil in the upper oil chamber 74 on the corresponding side can flow to the upper oil chamber 74 on the other side, and the oil in the lower oil chamber 73 on the corresponding side can be compensated by the lower oil chamber 73 on the other side.
The invention can realize the identification of the unbalanced load direction and the unbalanced load quantity, and can also realize the correction of the unbalanced load, when the unbalanced load is overlarge, the oil rod 94 moves until the connecting plate 93 moves to one side to the limit position, the outlet 98 on the same side can emerge from the inside of the identification box 9, the left cavity 91 is communicated with the right cavity 92, and the left lifting rope 2 and the right lifting rope 3 are subjected to length compensation, so that the correction of the unbalanced load is realized;
when the right side is overweight, the left lifting rope 2 is lengthened, so that the gravity center of the steel structure 5 is left-biased, and unbalanced load is corrected;
specifically, the outlet 98 is arranged in a triangular shape, and the closer to the middle position of the oil lever 94, the smaller.
Under the above arrangement, when the outlet hole 98 just emerges from the inside of the identification box 9, the communication quantity of the outlet hole 98 is smaller at this time, so as to realize slow correction and avoid excessive fluctuation of the steel structure 5;
When the outlet holes 98 are quickly and completely out of the inside of the identification box 9, the surface load difference is very large at the moment, the communication quantity of the outlet holes 98 is quickly increased, quick correction is realized, and unsafe factors caused by overlarge left and right load difference when the steel structure 5 is hoisted are avoided;
Specifically, the position of the hanging point 4 and the middle position of the steel structure 5 are attached with the strain gauge 6, so as to obtain the local deformation of the steel structure 5, and the data of the strain gauge 6 are sent out by a wireless transmitter.
In embodiment 2, as a further improvement of embodiment 1, referring to fig. 3-10, a sliding ring 911 is slidingly provided on the inner side of the middle of the identification box 9, an electromagnet 913 is fixedly connected on the inner side of the sliding ring 911, a stop lever 912 is slidingly connected on the inner side of the sliding ring 911 through a fixing frame 914, the stop lever 912 can be extended and retracted up and down by means of the electromagnet 913, the top end of the stop lever 912 is made of a magnetic material, the bottom end of the stop lever 912 is obliquely arranged, the stop lever 912 can be inserted between different positions of the second spring 95 by sliding the sliding ring 911 and matching with the up and down extension of the stop lever 912, the effective acting length of the second spring 95 is changed, and therefore the stiffness coefficient of the effective functional section of the second spring 95 is changed to adapt to steel structures 5 with different weights, and the sliding range of the sliding ring 911 does not exceed the shielding surface of the outlet 98.
Under the arrangement, the effective acting length of the second spring 95 is changed by sliding the slip ring 911 and matching with the up-down expansion of the stop lever 912, so that the stiffness coefficient of the effective functional section of the second spring 95 is changed, and different sensitivities are matched, when the steel structure with larger weight is faced, the slip ring can be selectively moved to one side far away from the center of the identification box, at the moment, the stiffness coefficient of the effective functional section of the second spring 95 is reduced, the stiffness coefficient of the effective functional section of the second spring 95 is increased, the elasticity or the tension of the connecting plate is increased, the sensitivity of unbalanced load identification and correction can be reduced, when the steel structure with smaller weight is faced, the slip ring can be selectively moved to one side close to the center of the identification box, at the moment, the stiffness coefficient of the effective functional section of the second spring 95 is reduced, the elasticity or the tension of the connecting plate is reduced, and the sensitivity of unbalanced load identification and correction can be increased;
Specifically, the motor 99 is fixedly connected to the inner side of the identification box 9, the screw 910 is fixedly connected to the output end of the motor 99, the outer side of the screw 910 is in spiral connection with the inner side of the slip ring 911, and the position of the slip ring 911 is changed through rotation of the motor 99.
In embodiment 3, as a further improvement of embodiment 1, referring to fig. 3-12, a distance detecting rod 8 is rotatably connected between the top ends of two inner posts 75 through a rotating ball 88, after the left lifting rope 2 and the right lifting rope 3 are stressed and straightened, the length of the distance detecting rod 8 is recorded as an initial length, and in the lifting and transferring processes, the length change of the distance detecting rod 8 can reflect the linear distance change between two lifting points 4, so that the integral deflection deformation in the lifting process of the steel structure 5 is reflected linearly.
In the lifting process, the steel structure 5 is influenced by wind load and locally stressed for a long time, deflection deformation possibly occurs, and the linear distance change between two lifting points 4 is reflected by detecting the distance change of the upper parts of the left lifting rope 2 and the right lifting rope 3, so that the integral deflection deformation in the lifting process of the steel structure 5 is reflected linearly;
Specifically, the distance detecting rod 8 includes an outer rod 81, an inner rod 82 is slidingly connected to the inner side of the outer rod 81, a pulley 89 is fixedly connected to one end of the inner rod 82 inside the outer rod 81, a pull rope 83 is fixedly connected to the inner side of one end of the outer rod 81, a sliding block 86 is slidingly connected to the lower side of the outer rod 81 through a sliding groove, a first spring 84 is fixedly connected between the sliding block 86 and the inner side of one end of the outer rod 81, a damping force enough to resist the first spring 84 is provided between the inner rod 82 and the outer rod 81, and the other end of the pull rope 83 bypasses the pulley 89 and is fixedly connected with the sliding block 86;
The inside fixedly connected with first displacement point 87 of slider 86, the inboard fixedly connected with first displacement sensor 85 of bottom of outer pole 81, first displacement point 87 slides on first displacement sensor 85, obtains the length variation from measuring rod 8 through first displacement point 87, and the setting of movable pulley is used for playing the effect of slider 86 removal increment, ensures the sensitivity of length detection.
Because the distance change of the left lifting rope 2 and the right lifting rope 3 at the upper part is very weak, the moving amount of the sliding block 86 can be increased through the increment action of the movable pulleys, and the capturing of the length change is facilitated.
The method for monitoring the stress deformation of the integral hoisting of the large-span steel structure comprises the following steps:
The method comprises the steps that firstly, a left lifting rope 2 and a right lifting rope 3 are respectively connected with a lifting point 4 on a steel structure 5;
Step two, after people withdraw to the safe range, the crane starts to operate, and in the lifting and transferring processes, the length change of the distance detection rod 8 can reflect the linear distance change between the two lifting points 4, so that the integral deflection deformation in the lifting process of the steel structure 5 is reflected linearly;
step three, a strain gage 6 attached to the position of the hanging point 4 and the middle position of the steel structure 5 is used for obtaining local deformation of the steel structure 5;
Step four, when wind load is applied, the elasticity of the left lifting rope 2 and the right lifting rope 3 is different, or the gravity of the steel structure 5 is respectively uneven, the stress of the left lifting rope 2 and the stress of the right lifting rope 3 are different, when unbalanced load occurs on any side of the left lifting rope 2 and any side of the right lifting rope 3, the oil rod 94 slides, the sliding distance represents the unbalanced load amount, and stress monitoring is realized;
And fifthly, when the unbalanced load in the fourth step is too large, the connecting plate 93 moves to one side to a limit position, the outlet holes 98 on the same side can emerge from the inside of the identification box 9 to communicate the left cavity 91 with the right cavity 92, oil in the upper oil chamber 74 on the corresponding side can flow to the upper oil chamber 74 on the other side, and oil in the lower oil chamber 73 on the corresponding side can be compensated by the lower oil chamber 73 on the other side for balancing the load.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202510933148.9A CN120440780A (en) | 2025-07-08 | 2025-07-08 | Stress deformation monitoring system and method for integral hoisting of large-span steel structures |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202510933148.9A CN120440780A (en) | 2025-07-08 | 2025-07-08 | Stress deformation monitoring system and method for integral hoisting of large-span steel structures |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN120440780A true CN120440780A (en) | 2025-08-08 |
Family
ID=96622350
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202510933148.9A Pending CN120440780A (en) | 2025-07-08 | 2025-07-08 | Stress deformation monitoring system and method for integral hoisting of large-span steel structures |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN120440780A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN120587772A (en) * | 2025-08-11 | 2025-09-05 | 中交一公局集团有限公司 | A multi-angle adaptive bridge steel box girder welding robot system |
-
2025
- 2025-07-08 CN CN202510933148.9A patent/CN120440780A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN120587772A (en) * | 2025-08-11 | 2025-09-05 | 中交一公局集团有限公司 | A multi-angle adaptive bridge steel box girder welding robot system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN120440780A (en) | Stress deformation monitoring system and method for integral hoisting of large-span steel structures | |
| CN108016964B (en) | Elevator hoisting rope monitoring device and method | |
| CN206920100U (en) | A kind of rectangle round steel pipe transition mast attachment structure bidirectional load test device | |
| CN112374345A (en) | Hoisting automatic balancing machine | |
| CN204439353U (en) | A kind of ocean boat-carrying winch test platform | |
| CN110951936B (en) | A double pulley lifting device provided with a balancer and an oxygen lance device provided with the same | |
| CN113063671B (en) | A device and method for measuring temperature and humidity of concrete under constant axial tension | |
| CN106544957B (en) | Length adjustment device, stiffening girder of suspension bridge mounting system and method | |
| CN105692378A (en) | Elevator no-load balance coefficient detection device based on hydraulic cylinder direct jacking manner | |
| CN218579421U (en) | A prefabricated component balance device for prefabricated buildings | |
| CN205384216U (en) | Adhesion strength and coefficient of friction's test device between measurement building material | |
| CN219065139U (en) | Detection device for bearing capacity of beam structure | |
| CN105035977B (en) | Waist rope device, jib support device and crane | |
| CN215338945U (en) | Quick detection device of horizontal hank mill | |
| CN206720600U (en) | A kind of tower crane of high stability | |
| CN111186758A (en) | Self-balancing lifting device and control method thereof | |
| CN215727378U (en) | Concrete temperature and humidity measuring device under constant axial tension effect | |
| AU711763B2 (en) | Door | |
| CN211895643U (en) | Self-balancing lifting device | |
| CN212621833U (en) | Composite cross arm structure test device | |
| CN117361350A (en) | Building site tower crane check out test set | |
| CN210181153U (en) | Test system suitable for multi-bundle conductor overturning fault research | |
| CN222701550U (en) | Steel-concrete structure integrated prefabricated wallboard external frame-free construction device | |
| CN112093682A (en) | Arm support telescopic tower crane with attachment mechanism and working method thereof | |
| CN113816250B (en) | Connecting structure and connecting method for fixing balance beam on crane |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |