Laser surveying instrument for municipal engineering

Abstract

The invention discloses a laser surveying instrument for municipal engineering, and relates to the technical field of laser surveying instruments. Wherein a control panel is arranged behind the top surface of the surveying instrument body; the surveying instrument is characterized in that a positioning mechanism is arranged on the bottom surface of the surveying instrument body and comprises a positioning platform, a main supporting sleeve is rotationally connected to the rear portion of the bottom surface of the positioning platform, and the left side and the right side of the front portion of the bottom surface of the positioning platform rotate to the top ends of auxiliary supporting sleeves; a regulation and control mechanism is arranged in the middle of the bottom face of the positioning platform. According to the laser surveying instrument for municipal engineering, the surveying instrument is positioned and locked through the positioning platform, the main supporting sleeve and the auxiliary supporting sleeve synchronously rotate to form a lockable triangular support, and meanwhile, the multiple extension supporting legs are subjected to oil liquid conveying through the main synchronous oil cylinder and the auxiliary synchronous oil cylinder of the synchronous mechanism, so that the supporting lengths of the extension supporting legs are synchronously increased; and the use requirements of different conditions are met.

Description

Technical Field

[0001] The present invention relates to the technical field of laser surveying instruments, in particular to a laser surveying instrument for municipal engineering. Background Art

[0002] A laser mapper is a precision instrument that uses laser technology for spatial measurement. It primarily acquires the distance, shape, or three-dimensional coordinate data of a target object by emitting a laser beam and receiving the reflected signal. The distance is calculated by calculating the time difference between the laser emission and the reflected signal, combined with the speed of light. It can quickly complete large-scale mapping, such as in rugged areas that are difficult for drones to cover, to avoid damage to the measured object. It is suitable for scenarios such as cultural relic restoration and is commonly used in industries such as geological exploration and engineering construction to improve the accuracy and efficiency of terrain mapping. The invention with announcement number CN115046536A discloses a correctable laser surveying and mapping device based on municipal engineering surveying and mapping. Through the cooperation between the connecting column at the bottom of the laser surveying and mapping device body and the turntable, the laser surveying and mapping device body can be rotated by the turntable, which changes the previous phenomenon that the entire device needs to be adjusted to achieve rotation. The rotation of the laser surveying and mapping device body becomes more convenient and the rotation efficiency is improved. In order to reduce the vibration of the equipment and thus the impact on the detection of the laser surveying and mapping device body, the support plate 2 and the support frame 1 at the bottom are connected by a spring 1 and a shock-absorbing column, which can play a shock-absorbing role.

[0003] The utility model with announcement number CN214583233U discloses a three-dimensional laser engineering surveying and mapping equipment. The rotation of the roller in the rotating groove drives the rotating column to rotate, thereby adjusting the surveying angle of the surveying and mapping equipment; by providing leg connecting columns, support legs, triangular fixing frames and slots, the support legs rotate around the connecting columns to adjust the stability of the surveying and mapping equipment, and then the triangular fixing frames are engaged in the slots to fix the support legs, thereby improving the stability of the equipment.

[0004] However, the above-mentioned laser surveyor for municipal engineering projects still has the following problems during actual use: the support legs rotated outward to form a triangular support positioning to effectively support the laser surveyor, but such support legs cannot be effectively adapted to different terrain environments and different demand situations. The support legs set at equal angles need to be locked by limiting them one by one, and the extension legs inside the support legs also need to be adjusted one by one, which can easily cause the laser surveyor above to tilt and easily fall over and be damaged during the adjustment process, and the convenience and stability of the support adjustment cannot be effectively guaranteed.

[0005] Therefore, we proposed a laser surveying instrument for municipal engineering in order to solve the problems raised above. Summary of the Invention

[0006] The purpose of the present invention is to provide a laser surveying instrument for municipal engineering, which solves the problem that the existing support positioning method forms a triangle by rotating the support legs outward to effectively support the laser surveying instrument. However, this type of support legs cannot be effectively adapted to different terrain environments and different demand situations. The support legs set at equal angles need to be locked by limiting them one by one, and the extension legs inside the support legs also need to be adjusted one by one, which can easily cause the laser surveying instrument above to tilt and easily tip over and be damaged during the adjustment process, and cannot effectively ensure the convenience and stability of the support adjustment.

[0007] To achieve the above-mentioned object, the present invention provides the following technical solution: a laser surveying instrument for municipal engineering, comprising a surveying instrument body, and a laser projector fixedly mounted below the front face of the surveying instrument body; Among them, a control panel is set on the rear of the top surface of the surveying instrument body, which cooperates with the laser projector on the front of the surveying instrument body to realize the positioning and marking of measurement points of municipal engineering projects; The apparatus further comprises: a positioning mechanism is provided on the bottom surface of the surveying instrument body, and the positioning mechanism includes a positioning platform, and the rear of the bottom surface of the positioning platform is rotatably connected to the main support sleeve, and the left and right sides in front of the bottom surface of the positioning platform are both rotated on the top of the secondary support sleeve; A regulating mechanism is provided in the middle of the bottom surface of the positioning platform, and the regulating mechanism includes a regulating screw with a bearing installed in the middle of the bottom surface of the positioning platform, and a regulating slider is provided through the thread of the middle outer wall of the regulating screw.

[0008] Preferably, the positioning mechanism includes a positioning plug plate, and the inner end of the positioning plug plate is elastically penetrated and arranged on the left and right sides of the interior of the positioning platform, and the upper end of the positioning plug plate is slidably plugged into the left and right sides of the interior of the surveying instrument body, and the bottom surface of the surveying instrument body is plugged into the internal center position of the positioning platform, thereby improving stability when measuring the positioning mark.

[0009] Preferably, the main support sleeve and the auxiliary support sleeve included in the positioning mechanism are arranged with the same specifications and equal angle distribution, and positioning grooves are provided inside the main support sleeve and the auxiliary support sleeve, and the main support sleeve and the auxiliary support sleeve are freely rotated relative to the positioning platform to achieve support positioning.

[0010] Preferably, the regulating mechanism includes an extended support leg, and the upper end of the extended support leg slides through the interior of the main support sleeve and the auxiliary support sleeve, and the upper end of the extended support leg is slidably connected between the protrusion and the positioning groove inside the main support sleeve and the auxiliary support sleeve, thereby improving the stability of the extended support leg during lifting.

[0011] Preferably, the control mechanism includes a guide screw, and the guide screw is rotatably installed in the positioning groove on the outside of the main support sleeve through a bearing, and the lower end of the guide screw is fixedly installed with a control knob for easy rotation operation, and the guide screw thread passes through the protrusion connected to the upper end of the extension leg inside the main support sleeve.

[0012] Preferably, the regulating mechanism includes a transmission bushing, and the transmission bushing is fixedly mounted on the lower outer wall of the regulating slider, and the outer wall of the transmission bushing is hingedly connected to the inner end of the flip connecting rod at an equal angle, and the outer end of the flip connecting rod is hingedly connected to the lower inner walls of the main support sleeve and the auxiliary support sleeve arranged at an equal angle; A plug-in lock block is fixedly installed on one side of the upper end of the regulating slider close to the main support sleeve, and the outer end of the plug-in lock block slides into the interior of the plug-in lock slot, and the plug-in lock slot is opened at the protrusion on the upper end of the extended support leg inside the main support sleeve, which is used to position the extended support leg to prevent it from sliding autonomously.

[0013] Preferably, a synchronization mechanism is provided below the positioning platform, and the synchronization mechanism includes a main synchronization cylinder and a secondary synchronization cylinder, and the main synchronization cylinder is fixedly installed at the lower interior of the main support sleeve, and the secondary synchronization cylinder is fixedly installed at the lower interior of the secondary support sleeve, and a sealing top cover is fixedly installed at the upper end of the secondary synchronization cylinder, and the inner diameter of the secondary synchronization cylinder is 1 / 2 of the inner diameter of the main synchronization cylinder.

[0014] Preferably, the synchronization mechanism includes a synchronization piston rod, and the lower end of the synchronization piston rod is slidably arranged inside the main synchronization cylinder and the auxiliary synchronization cylinder, and the interiors of the main synchronization cylinder and the auxiliary synchronization cylinder are connected to the lower end of the synchronization piston rod through a resistance spring, and the synchronization piston rod inside the auxiliary synchronization cylinder is connected to the sealing top cover through a sealing ring to prevent oil overflow.

[0015] Preferably, the synchronization mechanism includes a main delivery pipeline and a secondary delivery pipeline, and the lower end of the main delivery pipeline is connected to the lower part of the interior of the main synchronization oil cylinder, so that the oil is located at the lower end of the synchronization piston rod inside the main delivery pipeline, and the oil is delivered through the main delivery pipeline after the synchronization piston rod descends and squeezes the oil.

[0016] Preferably, the lower end of the auxiliary delivery pipe included in the synchronization mechanism is connected to the upper part of the interior of the auxiliary synchronization cylinder, and the upper end of the symmetrically arranged auxiliary delivery pipe is connected to the upper end of the main delivery pipe, so that the oil inside the auxiliary delivery pipe is delivered to between the sealing top cover and the piston below the synchronization piston rod, and the oil is delivered to the inside of the auxiliary delivery pipe, squeezing the synchronization piston rod inside the auxiliary synchronization cylinder to descend.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: the laser surveying instrument for municipal engineering is positioned and locked with respect to the surveying instrument through a positioning platform, the main support sleeve and the auxiliary support sleeve rotate synchronously to form a lockable triangular support, and the multiple extension legs are simultaneously extended by the main synchronous cylinder and the auxiliary synchronous cylinder of the synchronization mechanism to transport oil, so that the extension legs increase the support length synchronously, adapting to the use requirements of different situations. The specific contents are as follows: 1. When the surveying instrument body is installed between the positioning platform, the locking pin at its bottom is inserted into the inside of the positioning platform. After the elastically connected positioning plug plate slides outward, the positioning platform supports the surveying instrument body so that the positioning plug plate can slide inward after being reset and inserted into the inside of the surveying instrument body, thereby improving the support stability of the surveying instrument body during surveying.

[0018] 2. The regulating screw under the rotating positioning platform drives the threaded regulating slider and the transmission bushing to slide downward synchronously. The transmission bushing drives the flip connecting rod set at equal angles on the outside to rotate, and then the main support sleeve and the auxiliary support sleeve hinged at the outer end rotate synchronously outward to form a triangular support structure.

[0019] Furthermore, during the descent process, the regulating slider and the transmission bushing below the positioning platform drive the plug-in lock block fixed on the outside to descend synchronously, and then disengage from the plug-in lock slot opened in the extended support leg inside the main support sleeve, so as to unlock the extended support leg and enable it to be raised and lowered for adaptive adjustment.

[0020] 3. By rotating the control knob inside the main support sleeve, the guide screw is driven to rotate, and the extended support leg threadedly connected to the guide screw is limited by the main support sleeve, and then slides out of the internal lifting length of the main support sleeve to adapt to the support range under different usage requirements.

[0021] 4. The extended support leg inside the main support sleeve slides downward, driving the synchronous piston rod to descend into the main synchronous cylinder, squeezing the oil inside it into the main delivery pipe, and then entering the auxiliary delivery pipe from the main delivery pipe. The oil is then delivered to the auxiliary synchronous cylinders on the left and right sides through the auxiliary delivery pipe to achieve synchronous movement.

[0022] Furthermore, the oil inside the secondary synchronization cylinder is transported to between the sealing top cover and the piston below the synchronization piston rod, and after continuous pressurization, it drives the synchronization piston rod and the extension legs inside the secondary support sleeve to descend, so that the extension legs set at equal angles can synchronously increase the support length to adapt to the usage requirements in different situations. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2This is a schematic diagram of the structure of the positioning platform of the present invention after being separated from the surveying instrument body; Figure 3 This is a schematic structural diagram of the primary support sleeve and the secondary support sleeve in their initial states; Figure 4 This is a schematic structural diagram of the main support sleeve and the auxiliary support sleeve after rotation of the present invention; Figure 5 This is a schematic diagram of the installation structure of the extended support leg of the present invention; Figure 6 This is a schematic diagram of the three-dimensional structure of the regulating slider and the transmission bushing of the present invention; Figure 7 For the present invention Figure 6 A in the middle is an enlarged structural diagram; Figure 8 Schematic diagram of the cross-sectional structure of the extended support leg of the present invention; Figure 9 It is a structural schematic diagram of the cross section of the main synchronous cylinder and the auxiliary synchronous cylinder of the present invention; Figure 10 For the present invention Figure 9 The enlarged structural diagram at B in the middle; Figure 11 This is a schematic diagram of the structure of the synchronous piston rod after it descends.

[0024] In the figure: 1. Surveying instrument body; 2. Laser projector; 3. Control panel; 4. Positioning platform; 5. Plug-in lock slot; 6. Main support sleeve; 7. Auxiliary support sleeve; 8. Control screw; 9. Control slider; 10. Positioning plug plate; 11. Positioning slide slot; 12. Extension leg; 13. Guide screw; 14. Control knob; 15. Transmission bushing; 16. Flip connecting rod; 17. Main synchronization cylinder; 18. Auxiliary synchronization cylinder; 19. Sealing top cover; 20. Synchronous piston rod; 21. Resistance spring; 22. Main delivery pipe; 23. Auxiliary delivery pipe; 24. Plug-in lock block. DETAILED DESCRIPTION

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the implementation regulations described are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0026] See also Figures 1-11 , the present invention provides the following technical solutions: Example 1: In order to solve the problems existing in the actual use of existing laser surveyors, this embodiment discloses the following technical solutions: a laser surveyor for municipal engineering, comprising a surveyor body 1, and a laser projector 2 fixedly mounted below the front of the surveyor body 1; wherein, a control panel 3 is provided at the rear of the top surface of the surveyor body 1, which cooperates with the laser projector 2 on the front of the surveyor body 1 to realize the positioning and marking of measurement points of municipal engineering; a positioning mechanism is provided on the bottom surface of the surveyor body 1, and the positioning mechanism includes a positioning platform 4.

[0027] The positioning mechanism includes a positioning plug-in plate 10, and the inner end of the positioning plug-in plate 10 is elastically penetrated and arranged on the left and right sides of the interior of the positioning platform 4, and the upper end of the positioning plug-in plate 10 is slidably inserted into the left and right sides of the interior of the surveying instrument body 1, and the bottom surface of the surveying instrument body 1 is inserted into the inner center position of the positioning platform 4, thereby improving stability when measuring the positioning mark.

[0028] like Figure 1-Figure 2 As shown, when the surveying instrument body 1 needs to be installed and positioned through the positioning platform 4, the positioning plug plates 10 elastically connected on the left and right sides of the positioning platform 4 are slid outward, and then the locking pins at the bottom end of the surveying instrument body 1 are inserted into the sockets inside the positioning platform 4, so that the positioning platform 4 supports the surveying instrument body 1, and then the elastically connected positioning plug plates 10 slide inward through elastic reset, so that the inner ends of the positioning plug plates 10 are inserted into the left and right sides of the surveying instrument body 1, and then the surveying instrument body 1 is locked and positioned to avoid dislocation and offset during subsequent use operations.

[0029] Furthermore, when the surveying instrument body 1 is in use, parameters are adjusted through the control panel 3 provided on the top thereof, and the laser projector 2 provided on the front of the surveying instrument body 1 realizes laser irradiation, thereby realizing the positioning and marking of measurement points of municipal engineering projects.

[0030] Example 2: In order to solve the problems existing in the actual use of the existing laser surveying instrument, this embodiment discloses the following technical solution: the main support sleeve 6 is rotatably connected to the rear of the bottom surface of the positioning platform 4, and the left and right sides in front of the bottom surface of the positioning platform 4 are both rotated on the top of the auxiliary support sleeve 7; the main support sleeve 6 and the auxiliary support sleeve 7 included in the positioning mechanism are arranged in a manner of the same specifications and equal angle distribution, and positioning grooves 11 are provided inside the main support sleeve 6 and the auxiliary support sleeve 7, and the main support sleeve 6 and the auxiliary support sleeve 7 are freely rotated relative to the positioning platform 4 to achieve support positioning.

[0031] An adjusting mechanism is provided in the middle of the bottom surface of the positioning platform 4, and the adjusting mechanism includes an adjusting screw 8 with a bearing installed in the middle of the bottom surface of the positioning platform 4, and an adjusting slider 9 is threaded through the middle outer wall of the adjusting screw 8. The adjusting mechanism includes an extension leg 12, and the upper end of the extension leg 12 slides through the interior of the main support sleeve 6 and the auxiliary support sleeve 7, and the upper end of the extension leg 12 is slidably connected between the positioning slide groove 11 inside the main support sleeve 6 and the auxiliary support sleeve 7 through a protrusion, thereby improving the stability of the extension leg 12 during lifting.

[0032] The regulating mechanism includes a transmission bushing 15, and the transmission bushing 15 is fixedly installed on the lower outer wall of the regulating slider 9, and the outer wall of the transmission bushing 15 is hingedly connected to the inner end of the flip link 16 at equal angles, and the outer end of the flip link 16 is hingedly connected to the lower inner walls of the main support sleeve 6 and the auxiliary support sleeve 7 set at equal angles; a plug-in lock block 24 is fixedly installed on the side of the upper end of the regulating slider 9 close to the main support sleeve 6, and the outer end of the plug-in lock block 24 slides into the interior of the plug-in lock slot 5, and the plug-in lock slot 5 is opened at the protrusion of the upper end of the extension leg 12 inside the main support sleeve 6, which is used to position the extension leg 12 to prevent it from sliding autonomously.

[0033] like Figure 4-Figure 5 As shown, when it is necessary to support and position the surveying instrument body 1 and the positioning platform 4, the regulating screw 8 installed under the positioning platform 4 is manually rotated, and the regulating slider 9 threadedly connected to the regulating screw 8 is limited by the transmission bushing 15 and the flip link 16, so that during the rotation of the regulating screw 8, the threaded regulating slider 9 drives the transmission bushing 15 to move downward synchronously, and then drives the hinged flip link 16 to rotate, so that the flip link 16 contacts the main support sleeve 6 and the auxiliary support sleeve 7 hinged at the outer end and tilts outward synchronously, thereby forming a triangular support method, thereby improving the stability of the support for the surveying instrument body 1 during surveying.

[0034] like Figure 6-Figure 7 As shown, when the regulating slider 9 below the positioning platform 4 slides downward, it drives the plug-in lock block 24 fixed on its outside to descend synchronously, and then separates from the plug-in lock groove 5 at the top protrusion of the extended leg 12, so that the extended leg 12 inside the main support sleeve 6 can be raised and lowered. Otherwise, the extended leg 12 is limited by the plug-in lock block 24 to avoid autonomous sliding during transportation.

[0035] Example 3: In order to solve the problems existing in the actual use of the existing laser surveying instrument, the present embodiment discloses the following technical solutions: the control mechanism includes a guide screw 13, and the guide screw 13 is rotatably installed in the positioning groove 11 on the outside of the main support sleeve 6 through a bearing, and the lower end of the guide screw 13 is fixedly installed with a control knob 14 for easy rotation operation, and the guide screw 13 is threadedly connected to the protrusion at the upper end of the extended support leg 12 inside the main support sleeve 6; a synchronization mechanism is provided below the positioning platform 4, and the synchronization mechanism includes a main synchronization cylinder 17 and a secondary synchronization cylinder 18, and the main synchronization cylinder 17 is fixedly installed at the lower part of the inside of the main support sleeve 6, and the secondary synchronization cylinder 18 is fixedly installed at the lower part of the inside of the secondary support sleeve 7, and the upper end of the secondary synchronization cylinder 18 is fixedly installed with a sealing top cover 19, and the inner diameter of the secondary synchronization cylinder 18 is 1 / 2 of the inner diameter of the main synchronization cylinder 17.

[0036] The synchronization mechanism includes a synchronization piston rod 20, and the lower end of the synchronization piston rod 20 is slidably arranged inside the main synchronization cylinder 17 and the auxiliary synchronization cylinder 18, and the interiors of the main synchronization cylinder 17 and the auxiliary synchronization cylinder 18 are connected to the lower ends of the synchronization piston rod 20 through the resistance spring 21, and the synchronization piston rod 20 inside the auxiliary synchronization cylinder 18 is connected to the sealing top cover 19 through a sealing ring to prevent oil overflow; the synchronization mechanism includes a main delivery pipe 22 and an auxiliary delivery pipe 23, and the lower end of the main delivery pipe 22 is connected to the lower part of the interior of the main synchronization cylinder 17, so that the oil is located at the lower end of the synchronization piston rod 20 inside the main delivery pipe 22, and is delivered through the main delivery pipe 22 after the synchronization piston rod 20 descends and squeezes the oil.

[0037] The lower end of the auxiliary delivery pipe 23 included in the synchronization mechanism is connected to the upper part of the auxiliary synchronization cylinder 18, and the upper end of the symmetrically arranged auxiliary delivery pipe 23 is connected to the upper end of the main delivery pipe 22, so that the oil inside the auxiliary delivery pipe 23 is delivered to between the sealing top cover 19 and the piston below the synchronization piston rod 20. The oil is delivered to the interior of the auxiliary delivery pipe 23, squeezing the synchronization piston rod 20 inside the auxiliary synchronization cylinder 18 to descend.

[0038] like Figure 8 As shown, when it is necessary to adjust the usable length of the extension leg 12, the guide screw 13 is driven by rotating the control knob 14 on the outside of the main support sleeve 6, and the extension leg 12 threadedly connected to the guide screw 13 is limited by the main support sleeve 6, so that the rotating guide screw 13 drives the extension leg 12 to move downward, and then slide out of the internal lifting length of the main support sleeve 6 to adapt to the support range under different usage requirements.

[0039] like Figures 9-11As shown, during the descent process, the extension leg 12 provided inside the main support sleeve 6 drives the internally provided synchronous piston rod 20 to move downward into the interior of the main synchronous cylinder 17, thereby squeezing the oil inside the main synchronous cylinder 17 into the main delivery pipe 22 connected thereto. At the same time, the main delivery pipe 22 delivers the oil to the auxiliary delivery pipes 23 on both sides, so that the oil is delivered to the interior of the auxiliary synchronous cylinder 18 through the auxiliary delivery pipes 23. At this time, the oil is between the sealing top cover 19 and the piston below the synchronous piston rod 20, and after continuous pressurization, it drives the synchronous piston rod 20 and the extension leg 12 inside the auxiliary support sleeve 7 to descend (the inner diameter of the auxiliary synchronous cylinder 18 is 1 / 2 of the inner diameter of the main synchronous cylinder 17, so that the oil inside the main synchronous cylinder 17 can simultaneously fill the auxiliary synchronous cylinders 18 on both sides, so that the synchronous piston rod 20 and the extension leg 12 arranged at equal angles have the same descending length). The support length is increased by the extension leg 12 arranged at equal angles to adapt to the usage requirements in different situations.

[0040] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A laser surveying instrument for municipal engineering, comprising a surveying instrument body (1), and a laser projector (2) fixedly mounted below the front face of the surveying instrument body (1); in, A control panel (3) is provided at the rear of the top surface of the surveying instrument body (1), and cooperates with the laser projector (2) on the front of the surveying instrument body (1) to realize the positioning and marking of measurement points of municipal engineering projects; It is characterized by further comprising: The bottom surface of the surveying instrument body (1) is provided with a positioning mechanism, and the positioning mechanism includes a positioning platform (4), and the rear of the bottom surface of the positioning platform (4) is rotatably connected to a main support sleeve (6), and the left and right sides in front of the bottom surface of the positioning platform (4) are both rotated on the top of the auxiliary support sleeve (7); A regulating mechanism is provided in the middle of the bottom surface of the positioning platform (4), and the regulating mechanism includes a regulating screw (8) with a bearing installed in the middle of the bottom surface of the positioning platform (4), and a regulating slider (9) is provided through a thread on the middle outer wall of the regulating screw (8).

2. The laser surveying instrument for municipal engineering according to claim 1, characterized in that: The positioning mechanism includes a positioning plug plate (10), and the inner end of the positioning plug plate (10) is elastically inserted into the left and right sides of the interior of the positioning platform (4), and the upper end of the positioning plug plate (10) is slidably inserted into the left and right sides of the interior of the surveying instrument body (1), and the bottom surface of the surveying instrument body (1) is inserted into the inner center position of the positioning platform (4), thereby improving stability when measuring the positioning mark.

3. The laser surveying instrument for municipal engineering according to claim 2, characterized in that: The main support sleeve (6) and the auxiliary support sleeve (7) included in the positioning mechanism are arranged in a manner of equal specifications and equal angle distribution, and positioning grooves (11) are provided inside the main support sleeve (6) and the auxiliary support sleeve (7), and the main support sleeve (6) and the auxiliary support sleeve (7) are freely rotated relative to the positioning platform (4) to achieve support positioning.

4. The laser surveying instrument for municipal engineering according to claim 1, characterized in that: The regulating mechanism includes an extension leg (12), and the upper end of the extension leg (12) is slidably penetrated inside the main support sleeve (6) and the auxiliary support sleeve (7), and the upper end of the extension leg (12) is slidably connected between the protrusion and the positioning slot (11) inside the main support sleeve (6) and the auxiliary support sleeve (7), thereby improving the stability of the extension leg (12) when lifting.

5. The laser surveying instrument for municipal engineering according to claim 4, characterized in that: The regulating mechanism includes a guide screw (13), and the guide screw (13) is rotatably mounted in a positioning slot (11) on the outside of the main support sleeve (6) through a bearing, and a regulating knob (14) for facilitating rotation operation is fixedly mounted on the lower end of the guide screw (13), and the guide screw (13) is threadedly connected to a protrusion on the upper end of the extension leg (12) inside the main support sleeve (6).

6. The laser surveying instrument for municipal engineering according to claim 5, characterized in that: The regulating mechanism includes a transmission bushing (15), and the transmission bushing (15) is fixedly mounted on the lower outer wall of the regulating slider (9), and the outer wall of the transmission bushing (15) is hingedly connected to the inner end of the flip link (16) at an equal angle, and the outer end of the flip link (16) is hingedly connected to the lower inner walls of the main support sleeve (6) and the auxiliary support sleeve (7) arranged at an equal angle; A plug-in lock block (24) is fixedly mounted on one side of the upper end of the regulating slider (9) close to the main support sleeve (6), and the outer end of the plug-in lock block (24) slides into the interior of the plug-in lock slot (5), and the plug-in lock slot (5) is opened at the protrusion at the upper end of the extension leg (12) inside the main support sleeve (6), and is used to position the extension leg (12) to prevent it from sliding autonomously.

7. The laser surveying instrument for municipal engineering according to claim 1, characterized in that: A synchronization mechanism is provided below the positioning platform (4), and the synchronization mechanism includes a main synchronization oil cylinder (17) and a sub-synchronization oil cylinder (18), and the main synchronization oil cylinder (17) is fixedly installed inside the main support sleeve (6), and the sub-synchronization oil cylinder (18) is fixedly installed inside the sub-support sleeve (7), and a sealing top cover (19) is fixedly installed on the upper end of the sub-synchronization oil cylinder (18), and the inner diameter of the sub-synchronization oil cylinder (18) is 1 / 2 of the inner diameter of the main synchronization oil cylinder (17).

8. The laser surveying instrument for municipal engineering according to claim 7, characterized in that: The synchronization mechanism includes a synchronization piston rod (20), and the lower end of the synchronization piston rod (20) is slidably arranged inside the main synchronization oil cylinder (17) and the auxiliary synchronization oil cylinder (18), and the interiors of the main synchronization oil cylinder (17) and the auxiliary synchronization oil cylinder (18) are connected to the lower end of the synchronization piston rod (20) through a resistance spring (21), and the synchronization piston rod (20) inside the auxiliary synchronization oil cylinder (18) is connected to the sealing top cover (19) through a sealing ring to prevent oil from overflowing.

9. The laser surveying instrument for municipal engineering according to claim 8, characterized in that: The synchronization mechanism includes a main delivery pipe (22) and a secondary delivery pipe (23), and the lower end of the main delivery pipe (22) is connected to the lower part of the main synchronization oil cylinder (17), so that the oil is located at the lower end of the synchronization piston rod (20) inside the main delivery pipe (22). After the synchronization piston rod (20) descends and squeezes the oil, it is delivered through the main delivery pipe (22).

10. The laser surveying instrument for municipal engineering according to claim 9, characterized in that: The lower end of the auxiliary delivery pipe (23) included in the synchronization mechanism is connected to the upper part of the auxiliary synchronization oil cylinder (18), and the upper end of the auxiliary delivery pipe (23) arranged symmetrically is connected to the upper end of the main delivery pipe (22), so that the oil in the auxiliary delivery pipe (23) is delivered to between the sealing top cover (19) and the piston below the synchronization piston rod (20), and the oil is delivered to the inside of the auxiliary delivery pipe (23), squeezing the synchronization piston rod (20) inside the auxiliary synchronization oil cylinder (18) to descend.

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