Steel box girder body offset measuring device and method

Abstract

The present application relates to steel box girder deflection measurement technical field, and disclose a kind of steel box girder beam body deflection measurement device and method, including wireline displacement meter body and the wireline of wireline displacement meter body outlet end arrangement, wireline displacement meter body outlet end fixedly installed at wireline outer side outlet sleeve, the pulling end of wireline is provided with pulling assembly installed on steel box girder beam body, the outer wall of outlet sleeve is provided with protective assembly for preventing water and dust from entering wireline displacement meter body outlet end, the outer wall of outlet sleeve is provided with comparison component for comparing the skew situation of wireline.The present application protects telescopic sleeve, connecting plate and other components can form sealing protection to outlet sleeve, avoid water, dust into wireline displacement meter body influence precision, when equipment is retracted, if wireline is accidentally dropped, spring and slide plate can reset action buffer to wireline, offset impact force, prevent wireline displacement meter body from being damaged due to impact, ensure the precision of long-term use of equipment.

Description

Technical Field

[0001] This invention relates to the field of steel box girder deviation measurement technology, and in particular to a steel box girder deviation measurement device and method. Background Technology

[0002] When measuring the displacement of a steel box girder using a wire-type displacement gauge, the wire-type displacement gauge is used as the displacement detection element. The wire-type displacement gauge is rigidly fixed to a relatively stationary reference structure such as a pier, cap beam, or temporary support. The end of the wire is fixed to the part of the steel box girder to be monitored. By measuring the expansion and contraction of the wire as the steel box girder moves, the longitudinal displacement, lateral deviation, vertical deflection, and support slippage of the steel box girder relative to the reference structure are detected in real time. This is a contact displacement measurement method that enables online monitoring of the displacement status of the steel box girder.

[0003] In the process of continuously monitoring and measuring the deviation of steel box girder using a wire-type displacement gauge, in order to achieve real-time acquisition of the lateral, longitudinal, and vertical displacements of the steel box girder, the wire needs to be kept extended for a long time and in the open working environment of the bridge. Under rainy, humid, or low-temperature weather conditions, water vapor in the air is prone to condense on the surface of the wire, forming water mist and water droplets. With the reciprocating extension and retraction of the wire, the attached moisture will be continuously carried into the outlet and internal cavity of the wire-type displacement gauge. At the same time, rainwater and moisture can also directly seep into the sensor through the gap between the wire and the housing. After long-term accumulation, it is easy to cause corrosion of the internal spring, jamming of the transmission mechanism, and failure of the coding element due to moisture, which will lead to displacement measurement data drift, jump, or even monitoring interruption, affecting the long-term stability and measurement accuracy of the steel box girder deviation monitoring system. Furthermore, if the wire is not pulled out vertically during the measurement process, it will affect the accuracy of the deviation measurement of the steel box girder in this direction.

[0004] Therefore, it is necessary to design a device and method for measuring the deviation of steel box girder to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a device and method for measuring the deviation of a steel box girder.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A steel box girder deviation measuring device includes a pull-wire displacement gauge body and a pull wire disposed at the output end of the pull-wire displacement gauge body. The output end of the pull-wire displacement gauge body is fixedly installed with an output sleeve located outside the pull wire. The pulling end of the pull wire is provided with a pulling component installed on the steel box girder body. The outer wall of the output sleeve is provided with a protective component for preventing water and dust from entering the output end of the pull-wire displacement gauge body. The outer wall of the output sleeve is provided with a comparison component for comparing the skewness of the pull wire. The protective component includes a protective telescopic sleeve that is threaded onto the outer wall of the end of the outlet sleeve. The telescopic end of the protective telescopic sleeve is fixedly installed with four arc-shaped pressure plates arranged in a ring array. The telescopic end of the protective telescopic sleeve is threaded with a threaded ring cap that matches the arc-shaped pressure plates. A sealing structure is provided between the telescopic end of the protective telescopic sleeve and the threaded ring cap.

[0007] As a preferred embodiment of the present invention, the sealing structure includes a pressure ring fixedly installed on the inner wall of the threaded ring cover, a connecting plate fixedly installed on the inner wall of the arc-shaped pressure plate, and a protective arc plate fixedly installed on the end of the connecting plate away from the arc-shaped pressure plate.

[0008] As a preferred embodiment of the present invention, the cross-sectional shape of the pressure ring is triangular, and the connecting plate and the protective arc plate are both made of rubber material.

[0009] As a preferred embodiment of the present invention, the pulling assembly includes a fixed sleeve disposed at the pulling end of the pull cable. An adjusting screw is disposed on the inner wall of the fixed sleeve. Two sliding grooves are symmetrically formed on the inner wall of the fixed sleeve. Two sliders that are slidably connected to the sliding grooves are symmetrically fixedly installed at the top end of the adjusting screw. A threaded sleeve that is screwed to the adjusting screw is rotatably installed at the bottom end of the fixed sleeve. A guide block is fixedly installed at the bottom end of the adjusting screw. A guide frame is slidably installed on the outer wall of the guide block. A threaded seat is fixedly installed on the side of the guide frame. A connecting thread head that is screwed to the threaded seat is rotatably installed at the pulling end of the pull cable.

[0010] As a preferred embodiment of the present invention, the inner diameter of the threaded ring cap is larger than the diameter of the connecting thread head, and an mounting plate is fixedly installed on the top end of the fixed sleeve.

[0011] As a preferred embodiment of the present invention, the guide block is in the shape of a square column, and the side of the guide block is in contact with the inner wall of the guide frame.

[0012] As a preferred embodiment of the present invention, the comparative assembly includes a shaft rotatably mounted on the outer wall of the outlet sleeve, an installation cylinder fixedly mounted at the bottom end of the shaft, a slide rod slidably mounted on the inner wall of the installation cylinder, and a collar coaxially arranged with the threaded ring cover fixedly mounted at one end of the slide rod located outside the installation cylinder.

[0013] As a preferred embodiment of the present invention, a sliding plate is slidably mounted on the inner wall of the mounting cylinder, and a spring is fixedly mounted between the side of the sliding plate and the inner wall of the mounting cylinder.

[0014] As a preferred embodiment of the present invention, a limiting ring corresponding to the collar is fixedly fitted on the outer wall of the end of the threaded ring cap.

[0015] A method for measuring the deviation of a steel box girder, using the aforementioned steel box girder deviation measuring device, includes the following steps: Step 1: The staff first securely fixes the wire-type displacement gauge body to a relatively stationary fixed position on the bridge pier using a special support to ensure that the wire-type displacement gauge body is installed stably and without loosening; then, the staff uses measuring tools to accurately measure the installation height of the wire-type displacement gauge body, laying the foundation for subsequent component installation and adjustment. Step 2: Install the threaded ring cap onto the pull wire, then fix the pulling assembly at the designated position on the steel box girder. After adjusting the height of the guide frame to match the body of the pull wire displacement gauge, tighten the pull wire to the guide frame. Step 3: Tighten the threaded ring cap to tighten the component and press the pull cable. Visually check the level of the pull cable with the help of the comparison component, correct any skewing in time, and ensure that the pull cable can be pulled out normally. Step 4: During use, the wire-type displacement gauge captures the displacement generated by the beam moving the wire and feeds back the data. The guide block cancels out interference from non-parallel displacement. During disassembly and reassembly, the spring buffers the wire's reset impact, protecting the equipment. The protective components also serve as a seal.

[0016] The present invention has the following beneficial effects: 1. During installation, the main body of the wire displacement gauge can be fixed in a stationary position using a special support. The pulling component is then precisely installed on the beam. The height adjustment ensures that the wire is horizontal. The wire and the protective sleeve are then firmly connected using components such as the threaded ring cap. At the same time, the comparison component can be used to visually check for wire misalignment, which can be corrected without additional tools. This simplifies the operation process and avoids problems such as loosening and offset from the installation source, ensuring the stability of subsequent measurement work. 2. When the beam undergoes displacement parallel to the guy wire, the device can directly capture the guy wire's extension and contraction and convert it into an electrical signal. If vertical or combined displacement occurs, the guide block can slide along the guide frame to cancel out the interference component, ensuring that only valid displacement data is captured. No complicated debugging is required throughout the process. Data can be processed and fed back in real time, providing accurate and reliable support for staff to understand the beam's condition and carry out maintenance and adjustments. 3. The protective telescopic sleeve, connecting plate and other components of this invention can form a sealed protection for the cable sleeve, preventing water and dust from entering the cable displacement meter body and affecting accuracy. When the equipment is retracted, if the cable is accidentally released, the spring and sliding plate can buffer the cable reset action, offset the impact force, and prevent the cable displacement meter body from being damaged by impact. This not only ensures the accuracy of the equipment for long-term use, but also reduces the equipment maintenance cost. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of a steel box girder deviation measuring device and method proposed in this invention. Figure 2This is a schematic diagram of the pulling component structure of a steel box girder deviation measuring device and method proposed in this invention; Figure 3 for Figure 2 Enlarged structural diagram at point A in the middle; Figure 4 This is an exploded structural diagram of the cable outlet sleeve and protective telescopic sleeve of the steel box girder deviation measuring device and method proposed in this invention. Figure 5 This is a front sectional view of the telescopic end of the protective telescopic sleeve of the steel box girder deviation measuring device and method proposed in this invention. Figure 6 for Figure 5 Enlarged structural diagram at point B; Figure 7 This is a comparative component exploded view of the steel box girder deviation measurement device and method proposed in this invention.

[0018] In the diagram: 1. Body of the pull-wire displacement gauge; 2. Cable sleeve; 3. Pull wire; 4. Pulling assembly; 41. Fixed sleeve; 42. Adjusting screw; 43. Slide groove; 44. Slider; 45. Threaded sleeve; 46. Guide block; 47. Guide frame; 48. Threaded seat; 49. Connecting threaded head; 5. Mounting plate; 6. Protective components; 61. Protective telescopic sleeve; 62. Arc-shaped pressure plate; 63. Threaded ring cap; 64. Pressure ring; 65. Connecting plate; 66. Protective arc plate; 67. Limiting ring; 7. Comparison components; 71. Shaft; 72. Mounting cylinder; 73. Slide rod; 74. Collar; 75. Spring; 76. Slide plate. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0020] Example 1: This example describes a steel box girder deviation measuring device. (Refer to...) Figure 1-7 The device includes a pull-wire displacement gauge body 1 and a pull wire 3 installed at the output end of the pull-wire displacement gauge body 1. The output end of the pull-wire displacement gauge body 1 is fixedly installed with an output sleeve 2 located outside the pull wire 3. The pulling end of the pull wire 3 is provided with a pulling component 4 installed on the steel box girder. The outer wall of the output sleeve 2 is provided with a protective component 6 for preventing water and dust from entering the output end of the pull-wire displacement gauge body 1. The outer wall of the output sleeve 2 is provided with a comparison component 7 for comparing the skewness of the pull wire 3. The protective component 6 includes a protective telescopic sleeve 61 that is threaded onto the outer wall of the end of the outlet sleeve 2. Four arc-shaped pressure plates 62 arranged in a ring array are fixedly installed on the telescopic end of the protective telescopic sleeve 61. A threaded ring cap 63 that is adapted to the arc-shaped pressure plate 62 is threaded onto the telescopic end of the protective telescopic sleeve 61. A sealing structure is provided between the telescopic end of the protective telescopic sleeve 61 and the threaded ring cap 63. The sealing structure includes a pressure ring 64 fixedly installed on the inner wall of the threaded ring cap 63. The pressure ring 64 has a triangular cross-sectional shape. A connecting plate 65 is fixedly installed on the inner wall of the arc-shaped pressure plate 62. A protective arc plate 66 is fixedly installed on the end of the connecting plate 65 away from the arc-shaped pressure plate 62. Both the connecting plate 65 and the protective arc plate 66 are made of rubber material.

[0021] The implementation principle of this embodiment is as follows: In actual use of the wire-type displacement meter, the operator must complete the equipment installation operation step by step according to the standard procedure. First, the wire-type displacement meter body 1 must be accurately installed and firmly fixed to a relatively static fixed position such as a bridge pier using a special support. This ensures that the wire-type displacement meter body 1 is installed stably and without loosening, laying a solid foundation for subsequent measurement work. Next, the operator must smoothly slide the threaded ring cap 63 onto the wire 3 from the pulling end. Then, the pulling component 4 is accurately installed at the designated position on the steel box girder. After installation, the pulling end of the wire 3 and the pulling component 4 must be firmly connected to prevent detachment during subsequent use. In case of loosening, after the connection is completed, the operator needs to use measuring tools to accurately measure the installation height of the pull-wire displacement gauge body 1, and make detailed adjustments to the position of the pulling component 4 according to the measurement data, until the pull wire 3 can always remain horizontal when pulled out, so as to avoid the measurement accuracy being affected by the tilt of the pull wire 3; after the adjustment is in place, the threaded ring cover 63 is slowly screwed onto the outer wall of the protective telescopic sleeve 61. During the screwing process, the threaded ring cover 63 can slide along the protective telescopic sleeve 61, and at the same time, the inclined surface on the inner wall pressure ring 64 generates a uniform squeezing force on the four arc-shaped pressure plates 62. Under the action of the squeezing force, the four arc-shaped pressure plates 62 will come together and proceed. The connecting plate 65 and the protective arc plate 66 are simultaneously tightened and firmly pressed against the pull wire 3, connecting the pull wire 3 to the telescopic end of the protective telescopic sleeve 61. After the equipment is installed, the staff can visually observe whether the pull wire 3 is tilted in the horizontal direction through the comparison component 7, promptly detect and correct the deviation of the pull wire 3, and ensure that the pull wire 3 can always be pulled horizontally and vertically out of the pull wire displacement gauge body 1, thus ensuring the accuracy of the measurement data from the source. In subsequent actual use, when the steel box girder body is displaced due to external factors, it will drive the pulling component 4 installed on the beam body to move synchronously, and the pulling component 4 will then pull the pull wire 3. When a corresponding displacement occurs, the wire-type displacement gauge body 1 can capture this displacement change in real time and quickly process and feed back the measured steel box girder deviation data, promptly notifying relevant personnel so that they can grasp the deviation of the steel box girder body as soon as possible, providing reliable data support for subsequent maintenance and adjustment work; while the wire 3 is stretched along with the steel box girder body, the wire 3 can drive the protective telescopic sleeve 61 to extend and retract, ensuring the normal use of the wire 3. At the same time, the connecting plate 65, the protective arc plate 66, and the protective telescopic sleeve 61 can form a sealed protection for the cable sleeve 2, preventing water and dust from entering the wire-type displacement gauge body 1.

[0022] Example 2: Based on Example 1, this example discloses a steel box girder deviation measuring device, such as... Figure 1-3As shown, the pulling assembly 4 includes a fixed sleeve 41 disposed at the pulling end of the pull cable 3. An adjusting screw 42 is disposed on the inner wall of the fixed sleeve 41. Two sliding grooves 43 are symmetrically opened on the inner wall of the fixed sleeve 41. Two sliders 44 that are slidably connected to the sliding grooves 43 are symmetrically fixedly installed at the top of the adjusting screw 42. A threaded sleeve 45 that is screwed to the adjusting screw 42 is rotatably installed at the bottom of the fixed sleeve 41. A guide block 46 is fixedly installed at the bottom of the adjusting screw 42. The guide block 46 is square column-shaped. A guide frame 47 is slidably installed on the outer wall of the guide block 46. The side of the guide block 46 fits against the inner wall of the guide frame 47. A threaded seat 48 is fixedly installed on the side of the guide frame 47. A connecting thread head 49 that is screwed to the threaded seat 48 is rotatably installed at the pulling end of the pull cable 3. The inner diameter of the threaded ring cap 63 is larger than the diameter of the connecting thread head 49. An installation plate 5 is fixedly installed at the top of the fixed sleeve 41.

[0023] The implementation principle of this embodiment is as follows: After installing the wire-type displacement gauge body 1, the workers first securely installed the fixing sleeve 41 at the designated beam position of the steel box girder using the special mounting plate 5. Then, based on the previously measured actual installation height of the wire-type displacement gauge body 1, the workers precisely adjusted the height of the guide frame 47. During the adjustment operation, the threaded sleeve 45 needs to be slowly rotated. Because the threaded sleeve 45 and the adjusting screw 42 are connected by a thread, and the adjusting screw 42 is slidably connected to the fixing sleeve 41 through a pre-set groove 43 and slider 44 structure, when the threaded sleeve 45 rotates... The adjusting screw 42 can be driven by the threaded drive to slide up and down along the groove 43 of the fixed sleeve 41, thereby driving the guide frame 47 connected to the adjusting screw 42 to move synchronously, so as to achieve precise adjustment of the height of the guide frame 47 until the height of the guide frame 47 is completely matched with the installation height of the pull-wire displacement gauge body 1, ensuring that the pull wire 3 can remain horizontal and extend and retract smoothly. After the adjustment is completed, the operator aligns the connecting thread head 49 at the end of the pull wire 3 with the threaded seat 48 on the guide frame 47, slowly screws it in and tightens it until the connecting thread head 49 and the threaded seat 48 are completely fitted and there is no looseness. The movement of the wire 3 and guide frame 47 can achieve a reliable connection. In subsequent actual use, when the steel box girder is displaced, it will simultaneously drive the mounting plate 5, fixing sleeve 41, and guide frame 47 to move together. If the displacement direction of the beam is parallel to the extension direction of the wire 3, it will directly drive the wire 3 to extend and retract. At this time, the wire displacement gauge body 1 can directly capture the extension and retraction of the wire 3 and convert it into a precise electrical signal, thereby quickly and accurately measuring the actual deviation data of the beam. When the beam is displaced perpendicular to the direction of the wire 3, or when it is displaced... When the composite displacement is tilted in the direction of the guy wire 3, the guy wire 3 has a certain recovery force that can tighten the guide frame 47, and the guide block 46 is square column-shaped. Therefore, the guide block 46 can slide freely along the inner wall of the guide frame 47. The sliding of the guide block 46 can offset the displacement component perpendicular to the direction of the guy wire 3, and avoid the displacement in this direction from interfering with the extension and contraction of the guy wire 3. This ensures that the guy wire displacement gauge body 1 can accurately capture the displacement data parallel to the direction of the guy wire 3, ensuring the accuracy and reliability of the entire displacement measurement work, and providing accurate data support for the measurement of the deviation of the steel box girder.

[0024] Example 3: Based on Example 1, this example discloses a steel box girder deviation measuring device, such as... Figure 4 and Figure 7As shown, the comparison assembly 7 includes a shaft 71 rotatably mounted on the outer wall of the outlet sleeve 2. An installation cylinder 72 is fixedly mounted at the bottom end of the shaft 71. A slide rod 73 is slidably mounted on the inner wall of the installation cylinder 72. A collar 74 coaxially arranged with the threaded ring cover 63 is fixedly mounted at one end of the slide rod 73 located outside the installation cylinder 72. A limiting ring 67 corresponding to the collar 74 is fixedly fitted on the outer wall of the end of the threaded ring cover 63. A sliding plate 76 is slidably mounted on the inner wall of the installation cylinder 72. A spring 75 is fixedly mounted between the side of the sliding plate 76 and the inner wall of the installation cylinder 72.

[0025] The implementation principle of this embodiment is as follows: When installing components of the pull-wire displacement gauge, the threaded cap 63 must first be screwed onto the front of the telescopic end of the protective telescopic sleeve 61. Before this, the threaded cap 63 should be fitted onto the inner side of the collar 74. After fitting, the collar 74 and the threaded cap 63 should be moved together. During this movement, the sliding rod 73 connected to the collar 74 will slide smoothly along the inner wall of the mounting cylinder 72. If the pull wire 3 becomes horizontally misaligned during this process, the shaft 71 between the mounting cylinder 72 and the sliding rod 73 will rotate as the threaded cap 63 and the collar 74 move along the pull wire 3. This rotation will directly cause the mounting cylinder 72 and the sliding rod 73 to lose parallelism with the cable outlet sleeve 2. This obvious positional deviation can be quickly detected by visual observation. Once detected, no additional testing tools are needed; simply adjusting the position of the pull wire 3 will correct the misalignment and ensure the smooth progress of subsequent installation work. After the equipment is used... During the disassembly and storage process, when the pull wire 3 separates from the guide frame 47, the pull wire 3 will have a certain reverse reset tendency during the previous pulling process. If the operator accidentally releases the pull end of the pull wire 3 during operation, the pull wire 3 will quickly reset under the action of the reverse reset tendency. During the reset process of the pull wire 3, the connecting thread head 49 at its end will directly impact the connecting plate 65 and the protective arc plate 66. This impact force will cause the protective telescopic sleeve 61 to shorten. At the same time, under the limiting action of the limiting ring 67, the slide rod 73 will continue to slide along the inner wall of the mounting cylinder 72. Finally, the slide rod 73 will contact the sliding plate 76 inside the mounting cylinder 72. The spring 75 connected to the sliding plate 76 will play a buffering role, effectively buffering the reset action of the pull wire 3, thereby avoiding the pull wire 3 from impacting the pull wire displacement gauge body 1 during the rapid reset process, preventing damage to the pull wire displacement gauge body 1 due to impact, and ensuring the service life and subsequent accuracy of the equipment.

[0026] Example 4: Based on Examples 1-3, this example discloses a method for measuring the deviation of a steel box girder, including the following steps: Step 1: The staff first securely fixes the wire-type displacement gauge body 1 to a relatively stationary fixed position on the bridge pier using a special support to ensure that the wire-type displacement gauge body 1 is installed stably and without loosening; then, the staff uses measuring tools to accurately measure the installation height of the wire-type displacement gauge body 1, laying the foundation for subsequent component installation and adjustment. Step 2: Install the threaded ring cap 63 onto the pull wire 3, then fix the pulling component 4 at the designated position on the steel box girder. After adjusting the height of the guide frame 47 to match the body 1 of the pull wire displacement gauge, tighten the pull wire 3 and the guide frame 47. Step 3: Tighten the threaded ring cap 63 to tighten the component and press the pull line 3. Visually check the level of the pull line 3 with the help of the comparison component 7, correct any skewness in time, and ensure that the pull line is pulled out normally. Step 4: When in use, the main body 1 of the pull-wire displacement gauge captures the displacement generated by the beam moving the pull wire 3 and feeds back the data. The guide block 46 cancels out the interference of non-parallel displacement. When disassembling and reassembling, the spring 75 buffers the impact of the pull wire 3 to reset, protecting the equipment. The protective component also plays a sealing role.

[0027] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A steel box girder body deviation measuring device, comprising a pull-wire displacement gauge body (1) and a pull wire (3) disposed at the output end of the pull-wire displacement gauge body (1), wherein an output sleeve (2) located outside the pull wire (3) is fixedly installed at the output end of the pull-wire displacement gauge body (1), characterized in that, The pulling end of the pull wire (3) is provided with a pulling component (4) installed on the steel box girder body. The outer wall of the outlet sleeve (2) is provided with a protective component (6) for preventing water and dust from entering the outlet end of the pull wire displacement gauge body (1). The outer wall of the outlet sleeve (2) is provided with a comparison component (7) for comparing the skewness of the pull wire (3). The protective component (6) includes a protective telescopic sleeve (61) threaded onto the outer wall of the end of the outlet sleeve (2). The telescopic end of the protective telescopic sleeve (61) is fixedly equipped with four arc-shaped pressure plates (62) arranged in a ring array. The telescopic end of the protective telescopic sleeve (61) is threaded with a threaded ring cap (63) adapted to the arc-shaped pressure plate (62). A sealing structure is provided between the telescopic end of the protective telescopic sleeve (61) and the threaded ring cap (63).

2. The steel box girder deviation measuring device according to claim 1, characterized in that, The sealing structure includes a pressure ring (64) fixedly installed on the inner wall of the threaded ring cover (63), a connecting plate (65) fixedly installed on the inner wall of the arc-shaped pressure plate (62), and a protective arc plate (66) fixedly installed at the end of the connecting plate (65) away from the arc-shaped pressure plate (62).

3. The steel box girder deviation measuring device according to claim 2, characterized in that, The cross-sectional shape of the pressure ring (64) is triangular, and the connecting plate (65) and the protective arc plate (66) are both made of rubber material.

4. The steel box girder deviation measuring device according to claim 1, characterized in that, The pulling assembly (4) includes a fixed sleeve (41) disposed at the pulling end of the pull wire (3). An adjusting screw (42) is disposed on the inner wall of the fixed sleeve (41). Two sliding grooves (43) are symmetrically opened on the inner wall of the fixed sleeve (41). Two sliders (44) that are slidably connected to the sliding grooves (43) are symmetrically fixedly installed at the top of the adjusting screw (42). A threaded sleeve (45) that is screwed to the adjusting screw (42) is rotatably installed at the bottom end of the fixed sleeve (41). A guide block (46) is fixedly installed at the bottom end of the adjusting screw (42). A guide frame (47) is slidably installed on the outer wall of the guide block (46). A threaded seat (48) is fixedly installed on the side of the guide frame (47). A connecting thread head (49) that is screwed to the threaded seat (48) is rotatably installed at the pulling end of the pull wire (3).

5. The steel box girder deviation measuring device according to claim 4, characterized in that, The inner diameter of the threaded ring cap (63) is larger than the diameter of the connecting thread head (49), and the top end of the fixed sleeve (41) is fixedly installed with an mounting plate (5).

6. The steel box girder deviation measuring device according to claim 4, characterized in that, The guide block (46) is square column-shaped, and the side of the guide block (46) is in contact with the inner wall of the guide frame (47).

7. The steel box girder deviation measuring device according to claim 1, characterized in that, The comparison assembly (7) includes a shaft (71) rotatably mounted on the outer wall of the outlet sleeve (2), an installation cylinder (72) fixedly mounted at the bottom end of the shaft (71), a slide rod (73) slidably mounted on the inner wall of the installation cylinder (72), and a collar (74) coaxially arranged with the threaded ring cover (63) fixedly mounted at one end of the slide rod (73) located outside the installation cylinder (72).

8. The steel box girder deviation measuring device according to claim 7, characterized in that, A sliding plate (76) is slidably mounted on the inner wall of the mounting cylinder (72), and a spring (75) is fixedly mounted between the side of the sliding plate (76) and the inner wall of the mounting cylinder (72).

9. A steel box girder deviation measuring device according to claim 7, characterized in that, The outer wall of the end of the threaded ring cap (63) is fixedly fitted with a limiting ring (67) corresponding to the collar (74).

10. A method for measuring the deviation of a steel box girder, using the steel box girder deviation measuring device according to any one of claims 1-9, characterized in that, Includes the following steps: Step 1: The staff first used a special support to firmly fix the main body (1) of the wire displacement gauge to a relatively static fixed position on the bridge pier to ensure that the main body (1) of the wire displacement gauge is installed stably and without loosening; then, the staff used measuring tools to accurately measure the installation height of the main body (1) of the wire displacement gauge, laying the foundation for the subsequent installation and adjustment of components. Step 2: Fit the threaded ring cap (63) onto the pull wire (3), then fix the pulling component (4) at the designated position on the steel box beam. After adjusting the height of the guide frame (47) to match the body (1) of the pull wire displacement gauge, tighten the pull wire (3) and the guide frame (47) together. Step 3: Tighten the threaded ring cap (63) to tighten the component and press the pull line (3). Visually check the level of the pull line (3) with the help of the comparison component (7), correct the skew in time, and ensure that the pull line is pulled out normally. Step 4: When in use, the main body (1) of the pull-wire displacement meter captures the displacement generated by the beam driving the pull wire (3) and feeds back the data. The guide block (46) cancels the interference of non-parallel displacement. When disassembling and reassembling, the spring (75) buffers the pull wire (3) to reset the impact, protect the equipment, and the protective component also plays a sealing role.

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