Laser measuring instrument for butt joint of steel box girders
By designing a laser measuring instrument for steel box girder docking, the time-consuming and labor-intensive problem of existing measurement devices is solved, high-precision and automated measurement and correction are achieved, and construction efficiency is improved.
Patent Information
- Application Number
- CN202411646103.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-18
- Publication Date
- 2025-02-07
AI Technical Summary
The measurement device used for the docking of existing steel box girders is time-consuming and labor-intensive, unable to meet the high-precision requirements, and it is difficult to correct errors in a timely manner under harsh environments, affecting construction efficiency.
A laser measuring instrument for steel box girder docking is designed, using a combination of guide rails, sliding mechanisms and laser components to achieve high-precision measurement and automatic correction of multi-point positions, simplifying the splicing and leveling process.
It improves the convenience and accuracy of measurement, reduces construction time and labor costs, enhances construction efficiency, and achieves high-precision automatic measurement and correction under harsh environments.
Smart Images
Figure CN119394178A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of steel bridge construction measurement, in particular to a laser measuring instrument for butt jointing of steel box girders. Background Art
[0002] With the gradual improvement of the design level of thin-walled steel box girders and the continuous advancement of manufacturing technology, today's mainstream large-span steel bridges all use steel box girders as the main beam form.
[0003] However, the docking precision requirements between steel box girders are relatively high, and the construction is difficult. The existing construction technology is difficult to meet the docking requirements. The existing measurement device for the docking of steel box girders requires multiple multi-point measurements, which is time-consuming and labor-intensive, and cannot meet the measurement accuracy requirements; it has high requirements for the observation environment, and it is impossible to correct errors or mistakes in a timely and effective manner during the docking process; during the measurement process, multi-point collaborative measurement is required, which not only requires multiple transport of the measurement device, but also requires repeated leveling and alignment steps, which greatly affects the construction efficiency. Summary of the invention
[0004] The purpose of the present invention is to provide a laser measuring instrument for butt jointing of steel box girders, which solves the technical problem that the measuring device for butt jointing of steel box girders in the prior art is time-consuming and labor-intensive.
[0005] The embodiment of the present application discloses a laser measuring instrument for butt jointing of steel box girders, comprising: At least one guide rail, one end of which is provided with a splicing groove, and the other end of which is connected with a splicing protrusion; A plurality of columns are installed at intervals at the bottom of the guide rail; A sliding mechanism, movably mounted inside the guide rail; A turntable, mounted on the sliding mechanism; A laser assembly is mounted on the turntable; The splicing protrusion comprises: A connecting section, one end of which is connected to the end surface of the guide rail; A locking segment connected to the other end of the connecting segment, wherein the longitudinal section of the locking segment covers the longitudinal section of the connecting segment; The splicing groove comprises: An inner groove section, provided on an end surface of the guide rail; At least two baffle sections are respectively arranged on two opposite side surfaces of the inner groove section.
[0006] The present application designs the guide rail so that it can be spliced and lengthened, and can be suitable for a variety of occasions. At the same time, the splicing protrusions and splicing grooves are designed to ensure the stability of the splicing.
[0007] Based on the above technical solution, the embodiment of the present application can also be improved as follows: Furthermore, when the two guide rails are spliced, the locking section of one of the guide rails is installed inside the groove section of the other guide rail, and the working surfaces of the two guide rails are in the same plane. The beneficial effect of adopting this step is that the stability of the guide rail connection can be ensured through a specific installation method.
[0008] Further, the bottom side of the locking section and the bottom side of the connecting section are in the same plane; The outer end surface of the splicing groove is T-shaped, and the width of the blocking section is not greater than the length of the connecting section. The beneficial effect of adopting this step is that the stability after splicing is ensured through specific design.
[0009] Furthermore, the guide rail is provided with a guide groove along its length direction, and both side walls of the guide groove are provided with limit grooves; The sliding mechanism includes a slider, which is T-shaped. The slider is installed inside the limiting groove, and the two sides of the slider cooperate with the limiting groove. The beneficial effect of adopting this step is that through the design of the guide groove and the limiting groove, the sliding mechanism can move stably, thereby realizing the adjustment of the position of the laser marking instrument.
[0010] Furthermore, the bottom of the guide groove is provided with two rolling grooves along its length direction; The sliding mechanism also includes a plurality of rollers, which are installed at intervals at the bottom of the slider and cooperate with the rolling grooves. The beneficial effect of this step is that the stable movement of the sliding block can be achieved through the cooperation between the rollers and the rolling grooves.
[0011] Furthermore, a through groove is formed at the bottom of the guide groove along its length direction; The sliding mechanism also includes a connecting bolt, which passes through the through slot and is installed at the bottom of the sliding block, and a connecting nut is installed on the connecting bolt. The beneficial effect of adopting this step is that locking is completed by the connecting bolt.
[0012] Furthermore, the guide groove is provided with scales along its length direction, and a plurality of positioning holes are provided at intervals on the groove wall of the guide groove, and the positioning holes correspond to the scales; The sliding mechanism also includes a positioning mechanism, which is installed inside the sliding block, and the convex column of the positioning mechanism corresponds to the positioning hole. The beneficial effect of adopting this step is that precise adjustment can be achieved through corresponding scales.
[0013] Furthermore, the positioning mechanism comprises: A positioning cavity is provided inside the slider, and matching holes are provided on both sides of the positioning cavity; A positioning frame, arranged inside the positioning cavity; A positioning spring, arranged inside the positioning frame; Two movable buttons are movably arranged at the front and rear ends of the positioning frame, and the ends of the movable buttons are connected to the positioning springs, and the movable buttons extend out of the slider; A hinged part, one end of which is connected to the movable button; A plurality of transition connecting pieces, one end of which is connected to the other end of the hinged member; A movable frame is arranged inside the positioning cavity, and the movable frame is located on both sides of the positioning frame, and the movable frame is connected to the other end of the transition connecting piece; A plurality of bosses are respectively arranged on the outer sides of the movable frame, and the bosses correspond to the matching holes. The beneficial effect of adopting this step is that the bosses can be locked by cooperating with each other through a plurality of components.
[0014] Furthermore, a bubble leveler is installed on the guide rail. The beneficial effect of adopting this step is that it facilitates the subsequent guide rail to be in a horizontal position.
[0015] Furthermore, the laser assembly comprises: A laser body is mounted on the turntable; At least two fixing blocks are installed at intervals on the top of the laser body; The sight is mounted on the fixed block. The beneficial effect of this step is to ensure the stable assembly of the laser component through the corresponding components.
[0016] The present application also discloses an anti-sliding support structure for a slope water collection well, comprising a plurality of combined fir wood piles, wherein the hook sections of adjacent combined fir wood piles cooperate with each other, thereby forming a support structure with good integrity.
[0017] One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages: 1. Compared with traditional measuring devices, this application is more convenient and accurate, effectively overcomes the problems of cumbersome disassembly and assembly and inconvenient transportation, and improves the work efficiency of construction personnel.
[0018] 2. This application realizes the adjustment of the observation length through a simple assembly guide rail, making rational and effective use of resources; it realizes multi-point measurement, and realizes high-precision observation by adjusting the distance and angle between the laser transmitting and receiving devices, saving time and effort.
[0019] 3. This application has a fast measurement speed, realizes automatic measurement, automatically corrects errors and saves data. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0021] Figure 1 It is a structural schematic diagram of a laser measuring instrument for butt jointing of steel box girders according to a specific embodiment of the present invention; Figure 2 for Figure 1 A schematic diagram of the structure from another angle; Figure 3 for Figure 1 A schematic diagram of the structure from another angle; Figure 4 for Figure 1 Schematic diagram of the structure of the middle and front end; Figure 5 for Figure 1 Structural diagram of the middle and back end parts; Figure 6 for Figure 1 Structural diagram of the middle sliding mechanism; Reference numerals: 1-guide rail; 2-column; 3-sliding mechanism; 4-turntable; 5-laser assembly; 6-bubble leveler; 101-joining groove; 102-joining protrusion; 103-locking section; 104-connecting section; 105-inner groove section; 106-blocking bar section; 107-guide groove; 108-limiting groove; 109-rolling groove; 110-through groove; 111-scale; 112-positioning hole; 301-slider; 302-roller; 303-connecting bolt; 304-connecting nut; 305-positioning mechanism; 306-protrusion; 307-positioning cavity; 308-matching hole; 309-positioning frame; 310-positioning spring; 311-movable button; 312-hinge; 313-transition connecting piece; 314-movable frame; 501-Laser body; 502-Fixed block; 503-Sighting mirror; 504-Operation screen. DETAILED DESCRIPTION
[0022] The following embodiments of the technical solution of the present invention are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and are therefore only used as examples, and cannot be used to limit the protection scope of the present invention. It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by those skilled in the art to which the present invention belongs.
[0023] In this application, unless otherwise clearly specified and limited, the terms "installation", "connection", "fixation" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0024] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.
[0025] Example: like Figure 1-6 As shown, the present application discloses a laser measuring instrument for steel box girder joint connection, which can be used in harsh outdoor environments, can measure multiple points simultaneously with high precision, and is relatively easy to assemble and disassemble.
[0026] like Figure 1 , 2 As shown, the specific structure of the laser measuring instrument includes: At least one guide rail 1, one end of the guide rail 1 is provided with a splicing groove 101, and the other end of the guide rail 1 is connected with a splicing protrusion 102. The splicing groove 101 and the splicing protrusion 102 in the present application correspond to each other. When in use, the splicing grooves 101 and the splicing protrusions 102 of two adjacent guide rails 1 cooperate with each other to form a stable guide rail of the length required by the user; A plurality of columns 2 are installed at intervals at the bottom of the guide rail 1. The columns 2 are preferably 4 and are arranged at intervals. The columns 2 can be a telescopic structure for adjustment so that the guide rail is in a horizontal position, which is convenient for splicing multiple guide rails. The sliding mechanism 3 is movably installed inside the guide rail 1. The sliding mechanism 3 cooperates with the guide rail 1. Specifically, the sliding mechanism 3 moves along the guide rail 1 to complete precise positioning, so that the laser component to be subsequently measured is in a corresponding position, thereby realizing multi-point measurement; A turntable 4 is mounted on the sliding mechanism 3. The turntable 4 is used to facilitate the subsequent rotation of the corresponding laser assembly, thereby achieving 360-degree measurement and improving the application scope of the present application. The turntable 4 may also be provided with scales at intervals along its circumferential direction, so that the user can adjust to a suitable position; The laser component 5 is installed on the turntable 4. The laser component 5 is used for measurement. It can be an existing laser component or a structure described in the following application.
[0027] Due to practical operation requirements, the guide rails 1 may need to be spliced. In this case, the splicing method uses the splicing grooves 101 and splicing protrusions 102 of two adjacent guide rails to cooperate with each other to complete the splicing, thereby forming the required length, which is convenient for the staff to operate.
[0028] Specifically, Figure 4 , 5 As shown, in order to ensure the stability of the guide rail 1 after splicing, the splicing protrusion 102 is designed, and the splicing protrusion 102 includes: Locking section 103; A connecting section 104, one end of which is connected to the locking section 103, and the other end of which is connected to the end surface of the guide rail 1. The longitudinal cross-sectional area of the connecting section 104 is smaller than the longitudinal cross-sectional area of the locking section 103, that is, the size of the locking section 103 is larger, so that the splicing can be better achieved; The splicing protrusion 102 is further described, wherein the splicing protrusion 102 is T-shaped, and the larger end is inserted into the splicing groove 101, that is, the locking section 103 is inserted into the splicing groove to complete the limit, which can well complete the positioning and ensure the stability of the two guide rails 1 after splicing; The splicing groove 101 includes: An inner groove section 105 is provided on the end surface of the guide rail 1; Two outer stopper sections 106 are respectively arranged on the two side surfaces of the inner groove section 105. The splicing groove 101 is formed into a structure that is wide inside and narrow outside, so that the splicing protrusion 102 can be inserted and locked after movement, thereby ensuring the stability after splicing; When the two guide rails 1 are spliced, the splicing protrusion 102 at the end of one of the guide rails 1 is assembled into the splicing groove 101 at the end of the other guide rail 1, and the working surfaces of the two guide rails are in the same plane, so as to ensure the stability of the movement of the laser assembly 5.
[0029] With respect to the aforementioned connection method, the present application further explains that the locking section 103 first enters from above the stop bar section 106, then enters into the inner groove section 105, and begins to move downward, so that the connecting section 104 enters between the two outer stop bar sections 106, and moves downward until it reaches the bottom of the splicing groove 101, completing the assembly.
[0030] After assembling multiple guide rails 1, it is necessary to ensure that the guide grooves in all guide rails 1 are in the same plane, so that it is convenient for the sliding mechanism 3 to move to the corresponding position for measurement; In order to achieve the above purpose, the bottom side of the locking section 103 and the bottom side of the connecting section 104 are in the same plane; The outer end face of the splicing groove 101 is T-shaped, the width of the baffle segment 106 corresponds to the length of the connecting segment 104, and the width of the baffle segment is not greater than the length of the connecting segment. Through the design of the specific structural position, it is ensured that the guide grooves of the guide rail 1 can be aligned after splicing.
[0031] When the sliding mechanism 3 moves, the stability of the sliding mechanism 3 needs to be ensured. The present application needs to be designed as follows: the guide rail 1 is provided with a guide groove 107 along its length direction, and both side walls of the guide groove 107 are provided with limit grooves 108; The sliding mechanism 3 includes a slider 301, which is T-shaped, and both sides of the slider 301 cooperate with the limiting groove 108, that is, the two sides of the slider 301 protrude outward and cooperate with the concave limiting groove 108, so as to ensure that the slider 301 can move stably, that is, move stably along the limiting groove 108 and the guide groove 107.
[0032] In order to further ensure the accuracy, the bottom of the guide groove 107 is provided with two rolling grooves 109 along its length direction; The sliding mechanism 3 also includes a plurality of rollers 302, which are installed at intervals at the bottom of the slider 301, and the rollers 302 cooperate with the rolling grooves 109; compared with the direct sliding of the slider 301, the present application provides rollers at the bottom of the slider 301 to ensure the stability of the slider 301 during movement, and at the same time provides rolling grooves 109 to further limit the movement trajectory of the rollers 302 to avoid deviation, thereby ensuring the accuracy of the measurement.
[0033] In order to ensure the stable movement of the slider 301 after assembly, a through groove 110 is formed at the bottom of the guide groove 107 along its length direction; The sliding mechanism 3 also includes a connecting bolt 303, which passes through the through slot 110 and is installed at the bottom of the slider 301, and a connecting nut 304 is installed on the connecting bolt 303; the connecting bolt 303 is first used to perform preliminary limiting, that is, when the slider 301 moves, the connecting bolt 303 is not locked, and the slider 301 can slide at this time. After reaching the corresponding position, the connecting nut 304 can be tightened to ensure the relative fixation of the slider 301.
[0034] This application is for subsequent accurate measurement, so it is necessary to determine the displacement of the slider 301. Therefore, this application provides a scale 111 along the length direction of the guide groove 107, and a plurality of positioning holes 112 are spaced apart on the groove wall of the guide groove 107, and the positioning holes 112 correspond to the scale 111; The sliding mechanism 3 further includes a positioning mechanism 305 . The positioning mechanism 305 is installed inside the sliding block 301 , and a protruding column 306 of the positioning mechanism 305 corresponds to the positioning hole 112 .
[0035] like Figure 6 As shown, the positioning mechanism 305 in the present application is further described. The positioning mechanism 305 in the present application includes: The positioning cavity 307 is provided inside the slider, and the two sides of the positioning cavity 307 are provided with matching holes 308. After moving to a certain position, the positioning mechanism 305 is pushed so that the boss 306 can enter the positioning hole 112 to complete the locking. In the present application, the side wall of the positioning cavity 307 is the side wall of the slider. The subsequent description extends the positioning cavity 307, that is, passes through the slider; A positioning frame 309 is disposed inside the positioning cavity 307, and the positioning frame 309 can subsequently push the transition connecting piece to move; The positioning spring 310 is disposed inside the positioning frame 309 and is mainly used for resetting the subsequent active button 311; Two movable buttons 311 are movably arranged at the front and rear ends of the positioning frame 309, and the ends of the movable buttons 311 are connected to the positioning spring 310. The movable buttons 311 extend from the positioning cavity 307 to the outside of the slider 301. The movable buttons 311 pass through the ends of the positioning frame 309. A hinge 312, one end of which is connected to the movable button 311; One end of the multiple transition connecting pieces 313 is connected to the other end of the hinge 312. Specifically, when the slider is working, the movable button 311 is pressed, which drives one end of the hinge 312 to move inward, that is, rotate, and pull the transition connecting piece 313 inward to complete the contraction. When positioning is required, it is only necessary to release the movable button 311. At this time, the transition connecting piece 313 pushes the subsequent movable frame 314 and the boss 306 to move into the positioning hole 112 to complete the locking. A movable frame 314 is disposed inside the positioning cavity 307 and is located on both sides of the positioning frame 309 . The movable frame is connected to the other end of the transition connecting piece 313 . A plurality of protrusions 306 are respectively disposed on the outer sides of the movable frame 314 , and the protrusions 306 correspond to the matching holes 308 .
[0036] The positioning mechanism 305 of the present application is further described as follows: The positioning frame 309 in the present application is a frame body, which is used to ensure that the positioning frame 309 can be stably located inside the positioning cavity 307 through the movable buttons 311 at the front and rear ends; after releasing the movable buttons 311, the positioning spring 310 can push the movable buttons 311 at the front and rear ends to reset.
[0037] Further explanation is given on how the positioning frame 309 pushes the transition connecting piece 313. When the movable button 311 moves toward each other, the transition connecting piece 313 can be pulled toward each other through the hinge 312, which can pull the movable frame 314 inward, so that the boss 306 moves inward and disengages from the positioning hole, so that the slider 301 can move stably; when positioning is required, just release the movable button 311 to allow the boss 306 to enter the positioning hole 112 to complete the limiting.
[0038] The positioning frame 309 and the transition connecting piece 313 are at an obtuse angle and are hinged. When the positioning frame 309 moves inward, the position changes and can push the transition connecting piece 313 to move. The starting position of the protruding column on the outer side of the movable frame 314 is partially extended out of the matching hole 308. When the transition connecting piece 313 is pushed, the protruding column is further extended and enters the positioning hole to complete the limiting.
[0039] In order to ensure the stability of the guide rail 1, the present application installs a bubble leveler 6 on the guide rail 1, and the bubble leveler 6 is used to adjust the horizontality of the guide rail 1, so as to ensure the accuracy of the measurement result.
[0040] The laser component 5 is further described, wherein the laser component 5 may be an existing laser component, or may be the following structure, including: The laser body 501 is mounted on the rotating disk 4; At least two fixing blocks 502 are installed at intervals on the top of the laser body 501; The sight 503 is mounted on the fixed block 502. The sight is an existing device with an objective lens focusing knob and an eyepiece focusing knob. When in use, the objective lens focusing knob and the eyepiece focusing knob are used to focus so that the measuring point is within the line of sight. After accurate adjustment, the laser power is turned on and adjusted through the laser power adjustment knob.
[0041] Further explanation is given for the laser body 501, which includes a laser transmitter, a laser receiver, a laser power adjustment button, an operation button, and is also provided with a charging port, a USB interface, etc., which can realize data transmission. How the corresponding components are connected is existing and will not be repeated here.
[0042] An operation screen 504 is provided on the side of the laser body 501 to facilitate manual control by the staff.
[0043] The process of using this application is as follows: 1. Assemble the guide rails and columns, connect the guide rails and adjust the columns according to the actual situation, and level the device using a bubble leveler; 2. Connect the moving slider and the guide rail through the connecting bolts, and connect the laser assembly and the sliding mechanism through the turntable to ensure that the laser assembly can achieve 360° free rotation relative to the moving slider; 3. When the slider mechanism needs to be moved, press the movable button. At this time, the boss leaves the positioning hole and the slider mechanism can slide stably. When the movable button is released, the boss enters the positioning hole and the slider mechanism is locked. 4. When you reach the corresponding position, use the objective lens focusing knob and the eyepiece focusing knob to focus so that the measuring point is within the line of sight. After accurate adjustment, turn on and adjust the laser power using the laser power adjustment knob; 5. Use the operation button to open the operation screen. The operation button can be used to receive, delete, store, import and export data. The USB interface can be used to connect a USB flash drive to import and export measurement data. The operation screen can be used by touch screen.
[0044] In the description of the present invention, a large number of specific details are described. However, it is understood that embodiments of the present invention can be practiced without these specific details. In some instances, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this description. In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.
[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention.
Claims
1. A laser measuring instrument for butt jointing of steel box girders, characterized in that: include: At least one guide rail, one end of which is provided with a splicing groove, and the other end of which is connected with a splicing protrusion; A plurality of columns are installed at intervals at the bottom of the guide rail; A sliding mechanism, movably mounted inside the guide rail; A turntable, mounted on the sliding mechanism; A laser assembly is mounted on the turntable; The splicing protrusion comprises: A connecting section, one end of which is connected to the end surface of the guide rail; A locking segment connected to the other end of the connecting segment, wherein the longitudinal section of the locking segment covers the longitudinal section of the connecting segment; The splicing groove comprises: An inner groove section, provided on an end surface of the guide rail; At least two baffle sections are respectively arranged on two opposite side surfaces of the inner groove section.
2. The laser measuring instrument for butt jointing of steel box girders according to claim 1, characterized in that: When the two guide rails are spliced, the locking section of one of the guide rails is installed inside the groove section of the other guide rail, and the working surfaces of the two guide rails are in the same plane.
3. The laser measuring instrument for butt jointing of steel box girders according to claim 1, characterized in that: The bottom side of the locking section and the bottom side of the connecting section are in the same plane; The outer end surface of the splicing groove is T-shaped, and the width of the blocking section is not greater than the length of the connecting section.
4. The laser measuring instrument for butt jointing of steel box beams according to claim 1, characterized in that: The guide rail is provided with a guide groove along its length direction, and both side walls of the guide groove are provided with limit grooves; The sliding mechanism comprises a slider, which is T-shaped and installed inside the limiting groove, and two sides of the slider are matched with the limiting groove.
5. The laser measuring instrument for butt jointing of steel box beams according to claim 4, characterized in that: The bottom of the guide groove is provided with two rolling grooves along its length direction; The sliding mechanism further comprises a plurality of rollers, which are installed at intervals at the bottom of the sliding block and matched with the rolling grooves.
6. The laser measuring instrument for butt jointing of steel box beams according to claim 4, characterized in that: The bottom of the guide groove is provided with a through groove along its length direction; The sliding mechanism further comprises a connecting bolt, which passes through the through slot and is installed at the bottom of the sliding block, and a connecting nut is installed on the connecting bolt.
7. The laser measuring instrument for butt jointing of steel box beams according to claim 4, characterized in that: The guide groove is provided with scales along its length direction, and a plurality of positioning holes are provided at intervals on the groove wall of the guide groove, and the positioning holes correspond to the scales; The sliding mechanism further comprises a positioning mechanism, which is installed inside the sliding block, and the convex column of the positioning mechanism corresponds to the positioning hole.
8. The laser measuring instrument for butt jointing of steel box girders according to claim 7, characterized in that: The positioning mechanism comprises: A positioning cavity is provided inside the slider, and matching holes are provided on both sides of the positioning cavity; A positioning frame, arranged inside the positioning cavity; A positioning spring, arranged inside the positioning frame; Two movable buttons are movably arranged at the front and rear ends of the positioning frame, and the ends of the movable buttons are connected to the positioning springs, and the movable buttons extend out of the slider; A hinged part, one end of which is connected to the movable button; A plurality of transition connecting pieces, one end of which is connected to the other end of the hinged member; A movable frame is arranged inside the positioning cavity, and the movable frame is located on both sides of the positioning frame, and the movable frame is connected to the other end of the transition connecting piece; A plurality of convex columns are respectively arranged on the outer sides of the movable frame, and the convex columns correspond to the matching holes.
9. The laser measuring instrument for butt jointing of steel box girders according to claim 1, characterized in that: A bubble leveler is installed on the guide rail.
10. The laser measuring instrument for butt jointing of steel box girders according to claim 1, characterized in that: The laser assembly comprises: A laser body is mounted on the turntable; At least two fixing blocks are installed at intervals on the top of the laser body; A sight is mounted on the fixing block.