A steel-concrete hybrid variable cross-section continuous box girder splicing gap detection device

Abstract

The present invention discloses a steel-concrete hybrid variable cross-section continuous box girder splicing gap detection device, which relates to the field of detection devices and includes a support plate. A detection component is arranged on the support plate, and telescopic components are arranged on both sides of the support plate; the detection component is used to measure the gap between steel structures; the telescopic component includes a number of movable blocks arranged in a straight line. The movable block located away from the support plate is the starting block body, the movable block located close to the support plate is the ending block body, and at least one movable block located between the starting block body and the ending block body is the intermediate block body; both the intermediate block body and the ending block body can be moved from the overlapping position to the unfolded position in sequence along the direction from the starting block body to the ending block body; when the intermediate block body moves to the unfolded position, the intermediate block body is locked. This will increase the thickness of the movable block, meet the requirement for the movable block to extend into the gap, enable the detection component to detect the gap width of the lower part and the bottom of the steel structure, and is more simple and convenient to operate.

Description

Technical Field

[0001] The present invention relates to the field of detection devices, and particularly to a detection device for the splicing gap of a steel-concrete hybrid variable cross-section continuous box girder. Background Art

[0002] China has made rapid progress in the construction field of long-span steel-concrete hybrid variable cross-section continuous box girder bridges, and a number of long-span steel-concrete hybrid variable cross-section continuous box girder bridges have been built, represented by the double-track bridge of Shibanpo Yangtze River Bridge, Mawei Bridge, Xiaolan Waterway Bridge, and Oujiang Bridge. There are two construction methods for the construction of the steel beam part of the long-span steel-concrete hybrid variable cross-section continuous box girder bridge, namely integral large segment hoisting and small segment steel beam suspended splicing. The small segment suspended splicing has the advantages of simple construction method, high structural installation accuracy, good assembly quality, low requirements for lifting equipment, and wide application range. The small segment suspended splicing has laid a foundation for the long-span steel-concrete hybrid variable cross-section continuous box girder bridge at the bridge site with low navigation level, limited transportation and lifting capacity.

[0003] The steel beam part in the mid-span of the long-span steel-concrete hybrid variable cross-section continuous box girder bridge is often located at the center of the vertical curve, and the linear shape includes an arc and a partial straight line segment. The quality of the linear control of the steel beam part determines the driving comfort of the completed bridge and the landscape effect of the bridge. Therefore, the linear control of the steel beam during the small segment suspended splicing of the long-span steel-concrete hybrid variable cross-section continuous box girder bridge is the key to ensuring the linear shape of the completed bridge. When the steel beam is suspended and spliced, the crane suspends the steel box girder at the designated position and makes a preliminary fixation, and then connects the steel structures of the two steel box girders by welding. Before welding, it is necessary to measure the gap between the two steel structures, and control the gap to pre-align the two steel structures, which is convenient for parallel pushing of the aligned steel structure box girder to control its final gap, and can also prevent the increase of welding difficulty and the reduction of the strength of the welding part caused by too large a gap; it is convenient to accurately and efficiently master the splicing joint gap between the steel beam segments during the suspended splicing process.

[0004] Chinese Patent Application CN111610192A discloses a bridge gap detection device with a depth structure for bridge maintenance, including a base, side plates, a mounting plate, a protective cover, and a detection table. The center of the top of the base is fixedly connected to the bottom end of the side plate. The two ends of the top of the side plate are rotatably connected to the mounting plate through rotating shafts. Electric push rods are arranged between the two sides of the bottom of the mounting plate and the side plates. A support plate is arranged in the cavity at the top of the mounting plate. Rotating rods are arranged at the upper and lower ends of the support plate. One end of the rotating rod passes through the through hole of the mounting plate and is threadedly connected to a butterfly nut. A cylinder is arranged on the top of the support plate. The cylinder is connected to a hydraulic telescopic rod, and the hydraulic telescopic rod is connected to the protective cover. A detection table is arranged inside the protective cover, and a detector is arranged at the bottom of the detection table; it is convenient for moving and handling, stable when placed during detection, the device can flexibly adjust the installation angle of the detector at multiple angles, the measurement range of the bridge gap is wide, the manufacturing cost of the device is low, and the practicability is strong, which is suitable for popularization and use.

[0005] The above patents and the prior art also have the following defects:

[0006] Existing bridge gap detection can only detect the gaps on the surface of the bridge. Before the construction of the steel structure box girder, it is necessary to measure the widths of the gap surface and the inside of the gap. The existing detection devices cannot extend into the inside and bottom of the gap for detection, resulting in poor applicability. Moreover, the gap between two hoisted steel structure box girders is relatively narrow, and the depth of the gap between the two steel structure box girders from top to bottom is relatively high. Using a long support to extend the detection device into the gap will cause the height of the detection device to be relatively large, making it inconvenient to use and carry. While using a telescopic device to extend the detection device into the gap, more telescopic segments are required to meet the longer telescopic length, and more telescopic segments and the equipment for driving the telescopic segments to move will cause the thickness of the telescopic device to increase, unable to meet the requirement of extending into a relatively narrow gap.

[0007] Therefore, the present application provides a detection device for the splicing gap of a steel-concrete hybrid variable cross-section continuous box girder to meet the requirements. Summary of the Invention

[0008] The purpose of the present application is to provide a detection device for the splicing gap of a steel-concrete hybrid variable cross-section continuous box girder, which will not increase the thickness of the movable block, can meet the requirement of the movable block extending into the gap, enable the detection component to detect the gap width of the lower part and the bottom of the steel structure, and is simpler to operate and more convenient to use.

[0009] To achieve the above purpose, the present application provides the following technical solution: A detection device for the splicing gap of a steel-concrete hybrid variable cross-section continuous box girder, including a support plate, a detection component is arranged on the support plate, and telescopic components are arranged on both sides of the support plate; the detection component is used to measure the gap between steel structures;

[0010] The telescopic component includes a plurality of movable blocks arranged in a straight line. The movable block located at a position far from the support plate is the starting block body, the movable block located at a position close to the support plate is the ending block body, and at least one of the movable blocks located between the starting block body and the ending block body is an intermediate block body; both the intermediate block body and the ending block body can move from an overlapping position to an unfolded position in sequence along the direction from the starting block body to the ending block body; when the intermediate block body moves to the unfolded position, the intermediate block body is locked. Among two adjacent movable blocks, along the direction from the starting block body to the ending block body, when the next movable block moves to the overlapping position, it can unlock the previous movable block;

[0011] Hydraulic components are provided on all the other active blocks except the end block. Among two adjacent active blocks, along the direction from the starting block to the end block, the hydraulic component on the previous active block can drive the next active block to move vertically, so that the next active block moves between the overlapping position and the unfolded position;

[0012] The hydraulic component includes a hydraulic cylinder and a piston rod. When hydraulic oil enters the hydraulic cylinder and makes the piston rod move downward to the maximum stroke; the hydraulic oil in the hydraulic cylinder flows into the next hydraulic cylinder along the direction from the starting block to the end block.

[0013] Preferably, the hydraulic component further includes a fixing block. The hydraulic cylinder is fixedly installed on the corresponding active block. The piston rod is slidably fitted in the hydraulic cylinder and sealed with the hydraulic cylinder; the fixing block is fixedly installed at one end of the piston rod. Among two adjacent active blocks, along the direction from the starting block to the end block, one end of the fixing block in the previous hydraulic component is fixedly installed on the next active block; the hydraulic component further includes a hydraulic pump, and the hydraulic pump can pump hydraulic oil into the hydraulic cylinder far from the support plate;

[0014] A hydraulic pipe is provided between two adjacent hydraulic components. Among two adjacent hydraulic components, along the direction from the starting block to the end block, one end of the hydraulic pipe in the next hydraulic component is fixedly connected to a position near the top of the next hydraulic cylinder, and the other end is fixedly connected to a position near the bottom of the previous hydraulic cylinder.

[0015] Preferably, a locking member is installed at a position near the top of the middle block. Except for the middle block near the starting block, unlocking members are fixedly installed at positions near the top of other middle blocks and the end block. Except for the middle block near the end block, triggering members are fixedly installed at positions near the bottom of other middle blocks and the starting block.

[0016] The locking member includes a trapezoidal block, a connecting spring and a locking groove. A connecting groove is formed on the corresponding active block. One end of the connecting spring is fixedly installed at the bottom of the connecting groove. The trapezoidal block is arranged in the connecting groove and fixedly installed at the other end of the connecting spring. The locking groove is formed on the trapezoidal block.

[0017] Preferably, the detection component includes a detection rod, a torsion spring and a rotary encoder. The torsion spring can make the detection rod rotate on the support plate, and the rotary encoder can detect the angle between the detection rod and the support plate.

[0018] Preferably, a storage groove is formed in the support plate, and the detection rod is rotatably connected in the storage groove; a limiting component is arranged on the support plate, and the limiting component includes a connecting block, a limiting hydraulic cylinder, a limiting piston rod and a limiting block. The connecting block is fixedly installed on the support plate, the limiting hydraulic cylinder is fixedly installed on the connecting block, the limiting piston rod is slidably connected in the limiting hydraulic cylinder and is sealed with the limiting hydraulic cylinder, and the limiting block is fixedly installed on the limiting piston rod.

[0019] Preferably, the rotary encoder is connected with a power supply line, and a limiting hydraulic pipe is communicated with the limiting hydraulic cylinder; the power supply line is folded and arranged in the telescopic component on one side of the support plate, and the limiting hydraulic pipe is folded and arranged in the telescopic component on the other side of the support plate; a communication groove is formed in the movable block, and the power supply line and the limiting hydraulic pipe are arranged in the corresponding communication groove in an S shape respectively, and the power supply line and the limiting hydraulic pipe are fixedly installed at a position close to the top of the communication groove.

[0020] Preferably, a rotating shaft is fixedly installed on the detection rod, both sides of the rotating shaft are rotatably connected to the two side walls of the storage groove through bearings, a torsion spring is arranged on the rotating shaft, and the rotary encoder is arranged on the rotating shaft.

[0021] Preferably, it further includes a housing, a hydraulic pump and a hydraulic cylinder are arranged in the housing, the input end of the hydraulic pump is communicated in the hydraulic cylinder, the output end of the hydraulic pump is fixedly communicated with a connecting pipe, both ends of the connecting pipe are respectively fixedly communicated with a shunt pipe, and the other end of the shunt pipe is fixedly communicated with the hydraulic cylinder located on the starting block.

[0022] Preferably, a rotating shaft is rotatably connected in the housing, a protective shell is fixedly installed on the rotating shaft, the bottom of the protective shell is open, the starting block is fixedly installed in the protective shell, one end of the rotating shaft passes through the housing and is fixedly installed with a rotating block, a threaded hole is formed in the housing, a threaded rod is in threaded fit with the threaded hole, one end of the threaded rod close to the protective shell is rotatably connected with a locking plate, the other end of the threaded rod is fixedly installed with an operating block, a sliding rod is fixedly installed on one side of the locking plate close to the threaded rod, and a sliding hole is formed in the housing at a position corresponding to the sliding rod. The sliding rod passes through the sliding hole and is slidably matched with the sliding hole.

[0023] Preferably, sliding grooves are formed on one side of the starting block and the middle block close to the support plate, and sliding blocks are fixedly installed on one side of the middle block and the end block away from the support plate.

[0024] In summary, the technical effects and advantages of the present invention:

[0025] 1. In the present invention, through a plurality of movable blocks arranged in a straight line, each movable block can vertically move on the previous movable block, enabling the plurality of movable blocks to move into the gap, so that the detection component can enter the gap, and the detection component can detect the gap width of the lower part and the bottom of the steel structure. The operation is simpler and more convenient to use. The plurality of movable blocks are arranged in a straight line, which will not increase the thickness of the device, enabling the device to maintain a small thickness when telescoping a long distance and being able to easily extend into the gap for detection. By setting a plurality of hydraulic components to push the movable blocks to move, when hydraulic oil enters the hydraulic cylinder, the piston rod moves, and the hydraulic oil can sequentially enter a plurality of hydraulic cylinders to push the movable blocks to move, thereby reducing the increase in volume, energy consumption, and cost caused by using a plurality of drive sources. The drive source does not need to be placed on the movable block, and the hydraulic cylinder and the piston rod can be designed with a smaller diameter, which will not increase the thickness of the movable block and can meet the requirement of the movable block extending into the gap. When the movable blocks are unfolded downward, locking the downward-unfolded movable blocks can increase the stability of the movable blocks. At the same time, when the hydraulic oil is pumped out, according to the moving sequence of the movable blocks, when the previous movable block retracts and moves to the overlapping position, this movable block can be unlocked, and when this movable block moves to the overlapping position, the next movable block is unlocked, enabling the plurality of movable blocks to retract in sequence, which can effectively prevent the situation where some movable blocks cannot retract due to the hydraulic oil not flowing back from the tail to the head, improving the stability of equipment use and being more convenient to use;

[0026] 2. In the present invention, by rotating the detection rod to measure the gap width, when the rotation angle of the detection rod is small, the measured gap width is small, and when the rotation angle of the detection rod is large, the measured gap width is large. Moreover, the detection rod can extend into a relatively narrow gap for measurement, and the measurement range of the detection rod is large, enabling the measurement of a large gap width with a relatively thin thickness;

[0027] 3. In the present invention, a hydraulic pump pumps hydraulic oil into a hydraulic cylinder on a starting block. The hydraulic oil pushes the corresponding piston rod downward. When the piston rod pushes the corresponding movable block to the deployed position, the end of the piston rod moves beyond the position of the hydraulic pipe, causing the hydraulic oil in the hydraulic cylinder to enter the corresponding next hydraulic cylinder. In this way, all piston rods are pushed to move, causing the piston rods to drive the corresponding movable blocks to move. The pushed intermediate block is locked, and the end block is a movable device. When the hydraulic oil flows back, since the intermediate block is locked, its corresponding piston rod cannot retract, causing the piston rod corresponding to the end block to retract first, that is, the piston rod on the intermediate block on one side of the end block retracts first. After the corresponding movable block retracts to the overlapping position, this intermediate block is unlocked, and the hydraulic oil flows back in sequence, thereby causing the piston rods to retract in sequence from the end block to the starting block, effectively preventing the defect that in a hydraulic solution, multiple piston rods are driven by a single-channel hydraulic oil after being connected in series. During the backflow of the hydraulic oil, the pressure received by piston rods of the same specification is the same, resulting in the retraction of the piston rod corresponding to the intermediate block and the hydraulic oil in the lower-level piston rod being cut off and unable to retract, ensuring the stability of the device during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following-described drawings are only some embodiments of the present application. For those skilled in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0029] Figure 1 Structural schematic diagram of the housing and the operating block in the present invention;

[0030] Figure 2 Structural schematic diagram of the hydraulic pump, hydraulic cylinder, and protective housing in the present invention;

[0031] Figure 3 Structural schematic diagram of the threaded rod, operating block, and locking plate in the present invention;

[0032] Figure 4 Structural schematic diagram of the power supply wire, limiting hydraulic pipe, and protective housing in the present invention;

[0033] Figure 5 Structural schematic diagram of the detection component and the telescopic component in the present invention;

[0034] Figure 6 Structural schematic diagram of the hydraulic component in the present invention;

[0035] Figure 7 In the present invention Figure 6 Enlarged view of part A;

[0036] Figure 8 For the present invention Figure 6 An enlarged view of part B in the present invention;

[0037] Figure 9 A schematic structural view of the detection rod and the support plate in the present invention;

[0038] Figure 10 For the present invention Figure 9 An enlarged view of part C in the present invention;

[0039] Figure 11 A schematic structural view of the support plate in the present invention;

[0040] Figure 12 For the present invention Figure 11 An enlarged view of part D in the present invention;

[0041] Figure 13 For the present invention Figure 11 An enlarged view of part E in the present invention;

[0042] Figure 14 A schematic structural view of the piston block and the detection rod in the present invention;

[0043] Figure 15 For the present invention Figure 14 An enlarged view of part F in the present invention;

[0044] Figure 16 A schematic structural view of the support plate and the communication groove in the present invention;

[0045] Figure 17 For the present invention Figure 16 An enlarged view of part G in the present invention.

[0046] In the figure: 1. Support plate; 2. Detection assembly; 21. Detection rod; 22. Torsion spring; 23. Rotary encoder; 3. Telescopic assembly; 31. Movable block; 311. End block body; 312. Starting block body; 313. Intermediate block body; 4. Hydraulic assembly; 41. Hydraulic cylinder; 42. Piston rod; 43. Fixed block; 44. Hydraulic pump; 45. Hydraulic pipe; 5. Locking member; 51. Trapezoidal block; 52. Connecting spring; 53. Locking groove; 6. Unlocking member; 7. Trigger member; 8. Receiving groove; 9. Limiting assembly; 91. Connecting block; 92. Limiting hydraulic cylinder; 93. Limiting piston rod; 94. Limiting block; 10. Power supply wire; 11. Communication groove; 12. Rotating shaft; 13. Housing; 14. Hydraulic cylinder; 15. Connecting pipe; 16. Diverging pipe; 17. Protective shell; 18. Threaded rod; 19. Locking plate; 24. Operating block; 25. Sliding groove; 26. Sliding block; 27. Limiting hydraulic pipe. Detailed implementation manners

[0047] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0048] Embodiment: Refer to Figures 1 - 17 A steel-concrete hybrid variable cross-section continuous box girder splicing gap detection device as shown, which includes a support plate 1, a detection component 2 is arranged on the support plate 1, and telescopic components 3 are arranged on both sides of the support plate 1; the detection component 2 is used to measure the gap between steel structures;

[0049] The telescopic component 3 includes a number of movable blocks 31 arranged in a straight line. The movable block 31 located at a position far from the support plate 1 is the starting block 312, the movable block 31 located at a position close to the support plate 1 is the ending block 311, and at least one movable block 31 located between the starting block 312 and the ending block 311 is the intermediate block 313; both the intermediate block 313 and the ending block 311 can move from the overlapping position to the unfolded position in sequence along the direction from the starting block 312 to the ending block 311; when the intermediate block 313 moves to the unfolded position, the intermediate block 313 is locked. Among two adjacent movable blocks 31, along the direction from the starting block 312 to the ending block 311, when the next movable block 31 moves to the overlapping position, it can unlock the previous movable block 31;

[0050] Hydraulic components 4 are arranged on other movable blocks 31 except the ending block 311. Among two adjacent movable blocks 31, along the direction from the starting block 312 to the ending block 311, the hydraulic component 4 on the previous movable block 31 can drive the next movable block 31 to move vertically, so that the next movable block 31 moves between the overlapping position and the unfolded position;

[0051] The hydraulic component 4 includes a hydraulic cylinder 41 and a piston rod 42. When hydraulic oil enters the hydraulic cylinder 41 and the piston rod 42 moves downward to the maximum stroke; the hydraulic oil in the hydraulic cylinder 41 flows into the next hydraulic cylinder 41 along the direction from the starting block 312 to the ending block 311.

[0052] Through a plurality of movable blocks 31 arranged in a straight line, each movable block 31 can move vertically on the previous movable block 31, enabling the plurality of movable blocks 31 to extend downward. A hydraulic component 4 is provided on the movable block 31. Except for the end block 311, the hydraulic components 4 on other movable blocks 31 can push the next movable block 31 to move downward along the direction from the starting block 312 to the end block 311. A detection component 2 is fixedly installed on the end block 311. The hydraulic oil enters the hydraulic cylinder 41 to push the piston rod 42 to move downward, causing the piston rod 42 to push another pair of movable blocks 31 to move downward. After the piston rod 42 moves downward in place, the hydraulic oil enters the next corresponding hydraulic cylinder 41, thereby sequentially pushing the plurality of movable blocks 31 to move, enabling the movable blocks 31 to expand and move downward into the gap. After the movable blocks 31 expand and move downward, the middle block 313 is locked, and the end block 311 drives the detection component 2 into the gap. The detection component 2 detects the width of the gap. After the detection is completed, in the order of movement, when the previous movable block 31 moves upward to the overlapping position, the current movable block 31 is unlocked, and then the current movable block 31 is moved to unlock the next movable block 31.

[0053] Through a plurality of movable blocks 31 arranged in a straight line, each movable block 31 can move vertically on the previous movable block 31, enabling the plurality of movable blocks 31 to move into the gap, and enabling the detection component 2 to enter the gap, so that the detection component 2 can detect the gap width of the lower part and the bottom of the steel structure. The operation is simpler and more convenient to use; the plurality of movable blocks 31 are arranged in a straight line, which will not increase the thickness of the device, enabling the device to maintain a small thickness when it can stretch a long distance and can easily extend into the gap for detection; by setting a plurality of hydraulic components 4 to push the movable blocks 31 to move, the hydraulic oil enters the hydraulic cylinder 41 and the piston rod 42 moves, and the hydraulic oil can sequentially enter a plurality of hydraulic cylinders 41 to push the movable blocks 31 to move, thereby reducing the increase in volume, energy consumption and cost brought by using multiple drive sources. The drive source does not need to be placed on the movable block 31, and the hydraulic cylinder 41 and the piston rod 42 can be designed with a smaller diameter, which will not increase the thickness of the movable block 31 and can meet the requirement that the movable block 31 extends into the gap. When the movable block 31 expands downward, the downward-expanded movable block 31 is locked, which can increase the stability of the movable block 31. At the same time, when the hydraulic oil is pumped out, according to the movement order of the movable blocks 31, when the previous movable block 31 retracts and moves to the overlapping position, this movable block 31 can be unlocked. This movable block 31 moves to the overlapping position to unlock the next movable block 31, enabling the plurality of movable blocks 31 to retract in sequence, which can effectively prevent the situation that some movable blocks 31 cannot retract due to the hydraulic oil not flowing back from the tail to the head, improving the stability of equipment use and being more convenient to use.

[0054] Further, referring to Figures 1 - 17, the hydraulic component 4 further has a fixing block 43. The hydraulic cylinder 41 is fixedly installed on the corresponding movable block 31. The piston rod 42 is slidably fitted in the hydraulic cylinder 41 and is sealed with the hydraulic cylinder 41. The fixing block 43 is fixedly installed at one end of the piston rod 42. Among two adjacent movable blocks 31, along the direction from the starting block 312 to the ending block 311, one end of the fixing block 43 in the previous hydraulic component 4 is fixedly installed on the next movable block 31. The hydraulic component 4 further includes a hydraulic pump 44, and the hydraulic pump 44 can pump hydraulic oil into the hydraulic cylinder 41 away from the support plate 1.

[0055] A hydraulic pipe 45 is provided between two adjacent hydraulic components 4. Among two adjacent hydraulic components 4, along the direction from the starting block 312 to the ending block 311, one end of the hydraulic pipe 45 in the next hydraulic component 4 is fixedly connected to the position near the top of the next hydraulic cylinder 41, and the other end is fixedly connected to the position near the bottom of the previous hydraulic cylinder 41.

[0056] The hydraulic pump 44 pumps hydraulic oil into the hydraulic cylinder 41 on the starting block 312. The hydraulic oil pushes the corresponding piston rod 42 to move downward. When the piston rod 42 pushes the corresponding movable block 31 to move to the unfolded position, the end of the piston rod 42 moves beyond the position of the hydraulic pipe 45, so that the hydraulic oil in the hydraulic cylinder 41 enters the corresponding next hydraulic cylinder 41. In this way, all the piston rods 42 are pushed to move, and the piston rods 42 drive the corresponding movable blocks 31 to move. The pushed intermediate block 313 is locked, and the ending block 311 is a movable device. When the hydraulic oil flows back, since the intermediate block 313 is locked, its corresponding piston rod 42 cannot retract. So the piston rod 42 corresponding to the ending block 311 retracts first, that is, the piston rod 42 on the intermediate block 313 on one side of the ending block 311 retracts first. After the corresponding movable block 31 retracts to the overlapping position, this intermediate block 313 is unlocked, and the hydraulic oil flows back in sequence. Then the piston rods 42 retract in sequence from the ending block 311 to the starting block 312, which can effectively prevent the defect that in the hydraulic solution, the multi-stage piston rods 42 are driven by the hydraulic oil in one channel after being connected in series. During the process of the hydraulic oil flowing back, the pressures received by the piston rods 42 of the same specification are the same, resulting in the retraction of the piston rod 42 corresponding to the intermediate block 313 and the hydraulic oil in the lower-level piston rod 42 being cut off and unable to retract, ensuring the stability of the device during use.

[0057] Further, referring to Figures 1 - 17 , a locking member 5 is installed at the position near the top of the intermediate block 313. Except for the intermediate block 313 near the starting block 312, unlocking members 6 are fixedly installed at the positions near the tops of other intermediate blocks 313 and the ending block 311. Except for the intermediate block 313 near the ending block 311, triggering members 7 are fixedly installed at the positions near the bottoms of other intermediate blocks 313 and the starting block 312.

[0058] The locking member 5 includes a trapezoidal block 51, a connecting spring 52 and a locking groove 53. A connecting groove is formed on the corresponding movable block 31. One end of the connecting spring 52 is fixedly installed at the bottom of the connecting groove. The trapezoidal block 51 is arranged in the connecting groove and fixedly installed at the other end of the connecting spring 52. The locking groove 53 is formed on the trapezoidal block 51.

[0059] Taking the case where four movable blocks 31 are arranged in a straight line as an example, the four movable blocks 31 are divided into a starting block 312, two intermediate blocks 313 and an ending block 311. The four movable blocks 31 are sequentially numbered as the first movable block, the second movable block, the third movable block and the fourth movable block. A first trigger member is fixedly installed at the bottom of the first movable block. A second trigger member is fixedly installed at the bottom of the second movable block. A second locking member is fixedly installed at the top of the second movable block. A third locking member is fixedly installed at the top of the third movable block. A third unlocking member is fixedly installed at the top of the third movable block. A third locking member is fixedly installed at the top of the third movable block. A fourth unlocking member is fixedly installed at the top of the fourth movable block. When the second movable block moves downward to the unfolded position, the second locking member is located at the position of the first trigger member. When the third movable block moves downward to the unfolded position, the third unlocking member disengages from the second locking member, and the first trigger member enters the second locking member to lock the second locking member, thereby locking the second movable block. Similarly, when the third movable block moves downward to the unfolded position, the third locking member is located at the position of the second trigger member. When the fourth movable block moves downward to the unfolded position, the fourth unlocking member disengages from the third locking member, and the second trigger member locks the third locking member. When resetting upward, the fourth movable block moves upward to the overlapping position, and the fourth unlocking member moves to the position of the third locking member and presses down the third locking member, so that the second trigger member disengages from the third locking member, and the third locking member is unlocked. Then the third movable block moves upward, and the third unlocking member moves to the position of the second locking member and presses down the second locking member, so that the first trigger member disengages from the second locking member, and the second locking member is unlocked. The second movable block rises. The structures of the second locking member and the third locking member are the same as that of the locking member 5.

[0060] The trigger member 7 is rod-shaped, and the unlocking member 6 is plate-shaped. When the unlocking member 6 moves to the position of the corresponding locking member 5, it can press the corresponding trapezoidal block 51 into the connecting groove.

[0061] Further, referring to Figures 1 - 17 , the detection assembly 2 includes a detection rod 21, a torsion spring 22 and a rotary encoder 23. The torsion spring 22 can enable the detection rod 21 to rotate on the support plate 1, and the rotary encoder 23 can detect the angle between the detection rod 21 and the support plate 1.

[0062] After the support plate 1 enters the specified position of the gap, the torsion spring 22 drives the detection rod 21 to rotate, so that the end of the detection rod 21 abuts against one side of the steel structure gap, the support plate 1 abuts against the other side of the gap. The length of the detection rod 21 is fixed. The angle between the detection rod 21 and the support plate 1 is detected by the rotary encoder 23. The distance from the detection rod 21 to the support plate 1 plus the thickness of the support plate 1 is the width of the steel structure gap. The distance from the detection rod 21 to the support plate 1 is calculated through the length of the detection rod 21 and the angle between the detection rod 21 and the support plate 1. The thickness of the support plate 1 is fixed, so as to obtain the width of the steel structure gap.

[0063] Let the length of the detection rod 21 be A, the distance from the end of the detection rod 21 to the support plate 1 be B, the thickness of the support plate 1 be C, the angle between the detection rod 21 and the support plate 1 be d, and the width of the gap of the steel structure at the detection point be Z;

[0064] B = sin d × A

[0065] Z = B + C = (sin d × A) + C

[0066] The length of the detection rod 21 is 30 - 50 cm, preferably 40 cm, and the thickness of the support plate 1 is 3 - 5 cm, preferably 4 cm. The thickness of the support plate 1 is the distance from the axis of the rotation shaft 12 of the detection rod 21 to the other side of the support plate 1.

[0067] The rotary encoder 23 is an optoelectronic rotary encoder, which is a prior art. Specifically, reference can be made to the optoelectronic rotary encoder disclosed in Patent CN1303402C, and no more description will be given here.

[0068] The width of the gap is measured by the rotation of the detection rod 21. When the rotation angle of the detection rod 21 is small, the measured gap width is small; when the rotation angle of the detection rod 21 is large, the measured gap width is large. Moreover, the detection rod 21 can extend into a relatively narrow gap for measurement, and the measurement range of the detection rod 21 is large, and it can measure a relatively large gap width with a relatively thin thickness.

[0069] Further, referring to Figures 1 - 17 , a storage groove 8 is formed on the support plate 1, and the detection rod 21 is rotatably connected in the storage groove 8; a limiting component 9 is arranged on the support plate 1. The limiting component 9 includes a connecting block 91, a limiting hydraulic cylinder 92, a limiting piston rod 93 and a limiting block 94. The connecting block 91 is fixedly installed on the support plate 1, the limiting hydraulic cylinder 92 is fixedly installed on the connecting block 91, the limiting piston rod 93 is slidably connected in the limiting hydraulic cylinder 92 and is sealed with the limiting hydraulic cylinder 92, and the limiting block 94 is fixedly installed on the limiting piston rod 93.

[0070] After hydraulic oil is introduced into the limit hydraulic cylinder 92, the hydraulic oil pushes the limit piston rod 93 to move. The limit piston rod 93 pushes the limit block 94 to move, and the limit block 94 pushes the detection rod 21, so that the detection rod 21 is located in the storage groove 8. When the detection rod 21 does not detect during the moving process, it is located in the storage groove 8 and will not be stuck, making it easier to enter the gap.

[0071] Optionally, the support plate 1 can be provided with detection components 2 on both sides. When the detection gap is perpendicular to the placement surface of the detection device, the detection rods 21 rotate in opposite directions respectively for measurement, so that the measuring range can be increased while ensuring the overall thickness of the device.

[0072] Further, referring to Figures 1 - 17 , the rotary encoder 23 is connected with a power supply line 10, and a limit hydraulic pipe 27 is communicated with the limit hydraulic cylinder 92; the power supply line 10 is folded and arranged in the telescopic component 3 on one side of the support plate 1, and the limit hydraulic pipe 27 is folded and arranged in the telescopic component 3 on the other side of the support plate 1; a communication groove 11 is formed in the movable block 31, and the power supply line 10 and the limit hydraulic pipe 27 are arranged in the corresponding communication grooves 11 in an S shape respectively. The power supply line 10 and the limit hydraulic pipe 27 are fixedly installed at a position close to the top of the communication groove 11. The power supply line 10 is used to supply power and communicate with the rotary encoder 23, and the limit hydraulic pipe 27 is used to introduce hydraulic oil into the limit hydraulic cylinder 92 or make the hydraulic oil flow back. A baffle is fixedly installed on the movable block 31 corresponding to the position of the communication groove 11.

[0073] The limit hydraulic pipe 27 is also connected with a hydraulic pump body, which is prior art and not shown in the figure.

[0074] Further, referring to Figures 1 - 17 , a rotating shaft 12 is fixedly installed on the detection rod 21. Both sides of the rotating shaft 12 are rotationally connected to the two side walls of the storage groove 8 through bearings. A torsion spring 22 is arranged on the rotating shaft 12, and a rotary encoder 23 is arranged on the rotating shaft 12.

[0075] Through the torsion spring 22 at least the outer shell and the reed, the reed is spirally arranged. The inner ring of the reed is fixedly installed on the rotating shaft 12, and the outer ring of the reed is fixedly installed on the outer shell. The outer shell is fixedly installed on the wall of the storage groove 8.

[0076] Further, referring to Figures 1 - 17 , it further includes a housing 13. A hydraulic pump 44 and a hydraulic cylinder 14 are arranged in the housing 13. The input end of the hydraulic pump 44 is communicated with the hydraulic cylinder 14. The output end of the hydraulic pump 44 is fixedly communicated with a connecting pipe 15. Both ends of the connecting pipe 15 are respectively fixedly communicated with a shunt pipe 16. The other end of the shunt pipe 16 is fixedly communicated with a hydraulic cylinder 41 located on the starting block 312.

[0077] The hydraulic pump 44 can pump the hydraulic oil in the hydraulic cylinder 14 into the hydraulic pipe 45, or extract the hydraulic oil in the hydraulic pipe 45.

[0078] A controller is also provided in the housing 13. The controller can read and process the information of the rotary encoder 23. A storage battery is also provided in the housing 13, and the storage battery is used to supply power to the controller, the rotary encoder 23 and the hydraulic pump 44.

[0079] Further, referring to Figures 1 - 17 , a rotating shaft is rotatably connected in the housing 13. A protective housing 17 is fixedly installed on the rotating shaft. The bottom of the protective housing 17 is open. The starting block 312 is fixedly installed in the protective housing 17. One end of the rotating shaft passes through the housing 13 and is fixedly installed with a rotating block. A threaded hole is opened on the housing 13. A threaded rod 18 is in threaded fit with the threaded hole. One end of the threaded rod 18 close to the protective housing 17 is rotatably connected with a locking plate 19. The other end of the threaded rod 18 is fixedly installed with an operating block 24. A sliding rod is fixedly installed on one side of the locking plate 19 close to the threaded rod 18. A sliding hole is opened on the housing 13 at the position corresponding to the sliding rod. The sliding rod passes through the sliding hole and is in sliding fit with the sliding hole.

[0080] By rotating the rotating shaft to rotate the protective housing 17, the movable block 31 in the protective housing 17 is inclined, so that the unfolded movable block 31 can be unfolded to adapt to a gap with a certain inclination, and the applicability is stronger. By rotating the threaded rod 18, the threaded rod 18 drives the locking plate 19 to move, and the locking plate 19 presses against the protective housing 17, making the protective housing 17 stable and not easy to rotate.

[0081] Further, referring to Figures 1 - 17 , sliding grooves 25 are opened on one side of the starting block 312 and the intermediate block 313 close to the support plate 1. Sliding blocks 26 are fixedly installed on one side of the intermediate block 313 and the end block 311 away from the support plate 1. When the sliding block 26 corresponding to the movable block 31 moves to the top of the sliding groove 25, the movable block 31 is in an overlapping state. When the sliding block 26 corresponding to the movable block 31 moves to the bottom of the sliding groove 25, the movable block 31 is in an unfolded state.

[0082] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A steel-concrete hybrid variable cross-section continuous box girder splicing gap detection device, including a support plate (1), characterized in that: a detection component (2) is arranged on the support plate (1), and telescopic components (3) are arranged on both sides of the support plate (1); the detection component (2) is used to measure the gap between steel structures; the telescopic component (3) includes a number of movable blocks (31) arranged in a straight line. The movable block (31) located away from the support plate (1) is the starting block (312), and the movable block (31) located close to the support plate (1) is the ending block (311). At least one of the movable blocks (31) between the starting block (312) and the ending block (311) is an intermediate block (313); both the intermediate block (313) and the ending block (311) can move from the overlapping position to the unfolded position in sequence along the direction from the starting block (312) to the ending block (311); when the intermediate block (313) moves to the unfolded position, the intermediate block (313) is locked. Among two adjacent movable blocks (31), along the direction from the starting block (312) to the ending block (311), when the next movable block (31) moves to the overlapping position, it can unlock the previous movable block (31); hydraulic components (4) are arranged on other movable blocks (31) except the ending block (311). Among two adjacent movable blocks (31), along the direction from the starting block (312) to the ending block (311), the hydraulic component (4) on the previous movable block (31) can drive the next movable block (31) to move vertically, so that the next movable block (31) moves between the overlapping position and the unfolded position; the hydraulic component (4) includes a hydraulic cylinder (41) and a piston rod (42). When hydraulic oil enters the hydraulic cylinder (41) and the piston rod (42) moves downward to the maximum stroke; the hydraulic oil in the hydraulic cylinder (41) flows into the next hydraulic cylinder (41) along the direction from the starting block (312) to the ending block (311).

2. The steel-concrete hybrid variable cross-section continuous box girder splicing gap detection device according to claim 1, characterized in that: The hydraulic component (4) further includes a fixing block (43). The hydraulic cylinder (41) is fixedly installed on the corresponding movable block (31). The piston rod (42) is slidably fitted in the hydraulic cylinder (41) and is sealed with the hydraulic cylinder (41). The fixing block (43) is fixedly installed at one end of the piston rod (42). Among two adjacent movable blocks (31), along the direction from the starting block body (312) to the ending block body (311), one end of the fixing block (43) in the previous hydraulic component (4) is fixedly installed on the next movable block (31). The hydraulic component (4) further includes a hydraulic pump (44), and the hydraulic pump (44) can pump hydraulic oil into the hydraulic cylinder (41) far from the support plate (1). A hydraulic pipe (45) is arranged between two adjacent hydraulic components (4). Among two adjacent hydraulic components (4), along the direction from the starting block body (312) to the ending block body (311), one end of the hydraulic pipe (45) in the next hydraulic component (4) is fixedly communicated with the position near the top of the next hydraulic cylinder (41), and the other end is fixedly communicated with the position near the bottom of the previous hydraulic cylinder (41).

3. A steel-concrete hybrid variable cross-section continuous box girder splicing gap detection device according to claim 1, characterized in that: A locking member (5) is installed at a position near the top of the middle block body (313). Except for the middle block body (313) near the starting block body (312), unlocking members (6) are fixedly installed at positions near the top of other middle block bodies (313) and the ending block body (311). Except for the middle block body (313) near the ending block body (311), triggering members (7) are fixedly installed at positions near the bottom of other middle block bodies (313) and the starting block body (312). The locking member (5) includes a trapezoidal block (51), a connecting spring (52) and a locking groove (53). A connecting groove is formed on the corresponding movable block (31). One end of the connecting spring (52) is fixedly installed at the bottom of the connecting groove. The trapezoidal block (51) is arranged in the connecting groove and is fixedly installed at the other end of the connecting spring (52). The locking groove (53) is formed on the trapezoidal block (51).

4. A steel-concrete hybrid variable cross-section continuous box girder splicing gap detection device according to claim 1, characterized in that: The detection component (2) includes a detection rod (21), a torsion spring (22) and a rotary encoder (23). The torsion spring (22) can make the detection rod (21) rotate on the support plate (1), and the rotary encoder (23) can detect the angle between the detection rod (21) and the support plate (1).

5. A steel-concrete hybrid variable cross-section continuous box girder splicing gap detection device according to claim 4, characterized in that: The support plate (1) is provided with a storage groove (8), and the detection rod (21) is rotatably connected in the storage groove (8); a limiting component (9) is arranged on the support plate (1), and the limiting component (9) includes a connecting block (91), a limiting hydraulic cylinder (92), a limiting piston rod (93) and a limiting block (94). The connecting block (91) is fixedly installed on the support plate (1), the limiting hydraulic cylinder (92) is fixedly installed on the connecting block (91), the limiting piston rod (93) is slidably connected in the limiting hydraulic cylinder (92) and is sealed with the limiting hydraulic cylinder (92), and the limiting block (94) is fixedly installed on the limiting piston rod (93).

6. The steel-concrete hybrid variable cross-section continuous box girder splicing gap detection device according to claim 5, characterized in that: The rotary encoder (23) is connected with a power supply line (10), and a limiting hydraulic pipe (27) is communicated with the limiting hydraulic cylinder (92); the power supply line (10) is folded and arranged in the telescopic component (3) on one side of the support plate (1), and the limiting hydraulic pipe (27) is folded and arranged in the telescopic component (3) on the other side of the support plate (1); a communication groove (11) is opened on the movable block (31), and the power supply line (10) and the limiting hydraulic pipe (27) are arranged in the corresponding communication grooves (11) in an S shape, and the power supply line (10) and the limiting hydraulic pipe (27) are fixedly installed at a position close to the top of the communication groove (11).

7. The steel-concrete hybrid variable cross-section continuous box girder splicing gap detection device according to claim 5, characterized in that: A rotating shaft (12) is fixedly installed on the detection rod (21), and both sides of the rotating shaft (12) are rotatably connected to the two side walls of the storage groove (8) through bearings. The torsion spring (22) is arranged on the rotating shaft (12), and the rotary encoder (23) is arranged on the rotating shaft (12).

8. The steel-concrete hybrid variable cross-section continuous box girder splicing gap detection device according to claim 2, characterized in that: It further includes a housing (13), a hydraulic cylinder (14) is arranged in the housing (13), the input end of the hydraulic pump (44) is communicated in the hydraulic cylinder (14), the output end of the hydraulic pump (44) is fixedly communicated with a connecting pipe (15), both ends of the connecting pipe (15) are respectively fixedly communicated with a shunt pipe (16), and the other end of the shunt pipe (16) is fixedly communicated with the hydraulic cylinder (41) located on the starting block (312).

9. The steel-concrete hybrid variable cross-section continuous box girder splicing gap detection device according to claim 8, characterized in that: A rotating shaft is rotatably connected inside the housing (13), and a protective housing (17) is fixedly installed on the rotating shaft. The bottom of the protective housing (17) is open. The starting block (312) is fixedly installed inside the protective housing (17). One end of the rotating shaft passes through the housing (13) and is fixedly installed with a rotating block. A threaded hole is formed in the housing (13), and a threaded rod (18) is in threaded fit with the threaded hole. One end of the threaded rod (18) close to the protective housing (17) is rotatably connected with a locking plate (19), and the other end of the threaded rod (18) is fixedly installed with an operating block (24). A sliding rod is fixedly installed on one side of the locking plate (19) close to the threaded rod (18). A sliding hole is formed in the housing (13) at a position corresponding to the sliding rod, and the sliding rod passes through the sliding hole and is in sliding fit with the sliding hole.

10. A steel-concrete hybrid variable cross-section continuous box girder splicing gap detection device according to claim 1, characterized in that: Sliding grooves (25) are formed on one side of the starting block (312) and the intermediate block (313) close to the support plate (1), and sliding blocks (26) are fixedly installed on one side of the intermediate block (313) and the end block (311) away from the support plate (1).

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