Laser mapping instrument for municipal engineering

Abstract

The application discloses a kind of laser surveying instruments for municipal engineering, it is related to laser surveying instrument technical field, including surveying instrument body;Wherein, the top surface back of surveying instrument body is provided with control panel;Further include: the bottom surface of surveying instrument body is provided with positioning mechanism, and positioning mechanism contains positioning platform, and the bottom surface back of positioning platform is rotatably connected with main support sleeve, and the left and right sides of the front of positioning platform bottom surface are rotatable in the top of auxiliary support sleeve;The bottom surface middle part of positioning platform is provided with control mechanism.The laser surveying instrument for municipal engineering, positioning locking is carried out to surveying instrument by positioning platform, main support sleeve and auxiliary support sleeve are synchronously rotated to form lockable triangular support, and simultaneously, multiple extension legs are transported by main synchronous cylinder and auxiliary synchronous cylinder of synchronous mechanism Oil liquid, so that extension leg synchronous increase support length, adapt to the use demand of different situation.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of laser mapping instruments, and particularly relates to a laser mapping instrument for municipal engineering. BACKGROUND

[0002] The laser mapping instrument is a precision instrument for spatial measurement by using laser technology, which mainly obtains the distance, shape or three-dimensional coordinate data of a target object by emitting a laser beam and receiving a reflected signal, calculates the distance by combining the time difference between the laser emission and the reflected signal and the speed of light, and can quickly complete large-scale mapping, such as rugged areas that are difficult to cover by a drone, avoids damage to the measured object, is suitable for scenes such as cultural relic restoration, and is usually used in the industries of geological exploration and engineering construction to improve the accuracy and efficiency of topographic mapping.

[0003] The application with the announcement number CN115046536A discloses a correctable laser mapping device based on municipal engineering mapping, the laser mapping device body can rotate through the cooperation between the connecting column at the bottom of the laser mapping device body and the rotating disc, so that the rotation of the laser mapping device body becomes more convenient, and the rotation efficiency is improved. In order to reduce the vibration of the equipment and the influence of the vibration on the detection of the laser mapping device body, the support plate two and the support frame one at the bottom are connected by the spring one and the shock absorbing column, so that the shock absorbing effect can be achieved.

[0004] The utility model with the announcement number CN214583233U discloses a three-dimensional laser engineering mapping equipment, which can drive the rotating column to rotate through the rotation of the roller in the rotating surrounding groove, and then adjust the mapping angle of the mapping equipment. By setting the leg connecting column, the supporting leg, the triangular fixing frame and the clamping groove, the supporting leg is rotated around the connecting column to adjust the stability of the mapping equipment. Then, the triangular fixing frame is clamped in the clamping groove to fix the supporting leg, and the stability of the equipment is improved.

[0005] However, the above-mentioned laser mapping instrument for municipal engineering still has the following problems in actual use: the supporting legs rotating outward form a triangular support positioning to effectively support the laser mapping instrument, but such supporting legs cannot effectively adapt to different terrain environments and different demand occasions. The supporting legs with equal angles need to be locked by one-by-one limiting, and the extension legs inside the supporting legs also need to be adjusted one by one, which easily causes the laser mapping instrument above to incline and be easily knocked down and damaged during the adjustment process, and cannot effectively ensure the convenience and stability of the support adjustment.

[0006] Therefore, the laser mapping instrument for municipal engineering is proposed to solve the above-mentioned problems. SUMMARY

[0007] The purpose of the present application is to provide a municipal engineering laser mapping instrument, in order to solve the existing support positioning by forming a triangle with the outward rotating support leg, so as to effectively support the laser mapping instrument, but such support legs cannot effectively adapt to different terrain environments and different demand occasions, and the support legs need to be locked one by one through limiting, and the extension legs inside the support legs also need to be adjusted one by one, which is easy to cause the laser mapping instrument above to tilt and be damaged during adjustment, and cannot effectively ensure the convenience and stability of support adjustment.

[0008] In order to achieve the above purpose, the present application provides the following technical scheme: a municipal engineering laser mapping instrument, comprising a mapping instrument body and a laser projector fixedly installed on the front lower side of the mapping instrument body;

[0009] Among them, the top surface of the mapping instrument body is provided with a control panel behind the rear, which cooperates with the laser projector on the front of the mapping instrument body to realize the positioning and marking of the measurement points of municipal engineering;

[0010] Further comprising: the bottom surface of the mapping instrument body is provided with a positioning mechanism, and the positioning mechanism comprises a positioning platform, and the bottom surface of the positioning platform is rotatably connected with a main support sleeve behind the rear, and the left and right sides of the front of the bottom surface of the positioning platform are rotatably connected with the top ends of the auxiliary support sleeves;

[0011] The bottom surface of the positioning platform is provided with a control mechanism in the middle, and the control mechanism comprises a bearing installed on the control screw in the middle of the bottom surface of the positioning platform, and the middle outer wall of the control screw is provided with a control sliding block in the form of a threaded hole.

[0012] Preferably, the positioning mechanism comprises a positioning plugboard, and the inner ends of the positioning plugboard are elastically and penetratively arranged on the left and right sides inside the positioning platform, and the upper ends of the positioning plugboard are slidably and plug-in connected with the left and right sides inside the mapping instrument body, and the bottom surface of the mapping instrument body is plug-in connected with the inner center position of the positioning platform, thereby improving the stability during measurement and positioning marking.

[0013] Preferably, the main support sleeve and the auxiliary support sleeve of the positioning mechanism are arranged in the same size and equal angle distribution mode, and the interiors of the main support sleeve and the auxiliary support sleeve are both provided with positioning sliding grooves, and the main support sleeve and the auxiliary support sleeve are freely rotatable relative to the positioning platform to realize support positioning.

[0014] Preferably, the control mechanism comprises an extension leg, and the upper end of the extension leg is slidably and penetratively arranged in the interiors of the main support sleeve and the auxiliary support sleeve, and the upper end of the extension leg is slidably connected with the positioning sliding grooves in the interiors of the main support sleeve and the auxiliary support sleeve through the protrusions, thereby improving the stability of the extension leg during lifting.

[0015] Preferably, the control mechanism comprises a guide screw, and the guide screw is rotatably installed in the positioning sliding groove outside the main support sleeve through a bearing, and the lower end of the guide screw is fixedly installed with a control knob convenient for rotating operation, and the guide screw is screw-connected to the protrusion on the upper end of the extension leg inside the main support sleeve.

[0016] Preferably, the control mechanism comprises a transmission bushing, and the transmission bushing is fixedly installed below the outer wall of the control slider, and the outer wall of the transmission bushing is hingedly connected to the inner end of the overturning link, and the outer end of the overturning link is hingedly connected to the lower inner wall of the main support sleeve and the auxiliary support sleeve arranged at equal angles;

[0017] The upper end of the control slider is fixedly installed with a plug-in lock block on one side close to the main support sleeve, and the outer end of the plug-in lock block slides into the inside of the plug-in lock groove, and the plug-in lock groove is opened at the protrusion on the upper end of the extension leg inside the main support sleeve, so as to position the extension leg and prevent it from sliding by itself.

[0018] Preferably, the lower part of the positioning platform is provided with a synchronization mechanism, and the synchronization mechanism comprises a main synchronization oil cylinder and an auxiliary synchronization oil cylinder, and the main synchronization oil cylinder is fixedly installed inside and below the main support sleeve, and the auxiliary synchronization oil cylinder is fixedly installed inside and below the auxiliary support sleeve, and the upper end of the auxiliary synchronization oil cylinder is fixedly installed with a sealing top cover, and the inner diameter of the auxiliary synchronization oil cylinder is 1 / 2 of the inner diameter of the main synchronization oil cylinder.

[0019] Preferably, the synchronization mechanism comprises a synchronization piston rod, and the lower end of the synchronization piston rod is slidably arranged inside the main synchronization oil cylinder and the auxiliary synchronization oil cylinder, and the inside of the main synchronization oil cylinder and the auxiliary synchronization oil cylinder is connected to the lower end of the synchronization piston rod through a contact spring, and the synchronization piston rod inside the auxiliary synchronization oil cylinder is connected to the sealing top cover through a sealing ring, so as to prevent oil from overflowing.

[0020] Preferably, the synchronization mechanism comprises a main delivery pipeline and an auxiliary delivery pipeline, and the lower end of the main delivery pipeline is connected to the inside below the main synchronization oil cylinder, so that the oil inside the main delivery pipeline is located below the synchronization piston rod, and after the oil is extruded by the synchronization piston rod descending, it is delivered through the main delivery pipeline.

[0021] Preferably, the lower end of the auxiliary delivery pipeline of the synchronization mechanism is connected to the inside above the auxiliary synchronization oil cylinder, and the upper ends of the symmetrically arranged auxiliary delivery pipelines are connected to the upper end of the main delivery pipeline, so that the oil inside the auxiliary delivery pipeline is delivered to the space between the sealing top cover and the lower piston of the synchronization piston rod, and by delivering the oil into the auxiliary delivery pipeline, the synchronization piston rod inside the auxiliary synchronization oil cylinder is extruded to descend.

[0022] Compared with the prior art, the beneficial effects of the present application are: the laser surveying instrument for municipal engineering, through the positioning platform for positioning and locking the surveying instrument, the main support sleeve and the auxiliary support sleeve are synchronously rotated to form a lockable triangular support, and the multiple extension legs are synchronously oil-transported by the main and auxiliary synchronous oil cylinders of the synchronous mechanism, so that the extension legs synchronously increase the support length, adapt to different use requirements, and the specific contents are as follows:

[0023] 1. When the surveying instrument body is installed between the positioning platform, the lock pin at the bottom end is inserted into the inside of the positioning platform, and after the elastic connection positioning insert plate slides outward, the positioning platform bears the surveying instrument body, so that after the positioning insert plate resets and slides inward, it is inserted into the inside of the surveying instrument body, improving the stability of the support for the surveying instrument body during surveying.

[0024] 2. The control screw rod below the rotating positioning platform drives the threaded control slider and the transmission bush to synchronously slide downward, the transmission bush drives the outward equiangularly arranged overturning connecting rod to rotate, and then the outward hinged main support sleeve and auxiliary support sleeve synchronously rotate outward to form a triangular support structure.

[0025] Further, the control slider and the transmission bush below the positioning platform are lowered, the outward fixedly connected plug-in lock block is synchronously lowered, and then it is separated from the plug-in lock groove in the extension leg inside the main support sleeve, so as to unlock the extension leg, which can be lifted to adapt to the adjustment.

[0026] 3. By rotating the control knob arranged in the main support sleeve, the guide screw is rotated, and the extension leg threaded with the guide screw is limited by the main support sleeve, and then the length of the extension leg is increased by sliding out of the inside of the main support sleeve to adapt to the support range under different use requirements.

[0027] 4. The extension leg inside the main support sleeve slides downward, drives the synchronous piston rod to descend into the inside of the main synchronous oil cylinder, extrudes the oil inside to the inside of the main conveying pipeline, and then the oil is conveyed to the inside of the auxiliary conveying pipeline from the main conveying pipeline, and then the oil is conveyed to the inside of the auxiliary synchronous oil cylinder on the left and right sides through the auxiliary conveying pipeline, so as to realize synchronous movement.

[0028] Further, the oil in the auxiliary synchronous oil cylinder is conveyed between the sealing top cover and the piston below the synchronous piston rod, and after continuous pressurization, the synchronous piston rod and the extension leg inside the auxiliary support sleeve are lowered, so that the equiangularly arranged extension legs synchronously increase the support length to adapt to different use requirements. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 It is a whole three-dimensional structure schematic diagram of the present application;

[0030] Figure 2 Structure diagram of the positioning platform separated from the surveying instrument body of the present application;

[0031] Figure 3 Structure diagram of the main support sleeve and the auxiliary support sleeve in the initial state of the present application;

[0032] Figure 4 Structure diagram of the main support sleeve and the auxiliary support sleeve after rotation of the present application;

[0033] Figure 5 Structure diagram of the extension leg mounting structure of the present application;

[0034] Figure 6 Structure diagram of the control sliding block and the transmission bushing of the present application;

[0035] Figure 7 Structure diagram of the control sliding block and the transmission bushing of the present application; Figure 6 Structure diagram of the control sliding block and the transmission bushing of the present application;

[0036] Figure 8 Structure diagram of the extension leg mounting structure of the present application;

[0037] Figure 9 Structure diagram of the main and auxiliary synchronous oil cylinders of the present application;

[0038] Figure 10 Structure diagram of the control sliding block and the transmission bushing of the present application; Figure 9 Structure diagram of the control sliding block and the transmission bushing of the present application;

[0039] Figure 11 Structure diagram of the synchronous piston rod after descending of the present application.

[0040] 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 sliding block; 10, positioning plug-in plate; 11, positioning sliding groove; 12, extension leg; 13, guide screw; 14, control knob; 15, transmission bushing; 16, overturning connecting rod; 17, main synchronous oil cylinder; 18, auxiliary synchronous oil cylinder; 19, sealing top cover; 20, synchronous piston rod; 21, abutting spring; 22, main conveying pipeline; 23, auxiliary conveying pipeline; 24, plug-in lock block. DETAILED DESCRIPTION

[0041] Clearly, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by a person of ordinary skill in the art without creative effort belong to the scope of protection of the present application.

[0042] Please refer to Figures 1-11 The present application provides the following technical solutions:

[0043] Embodiment 1: In order to solve the problems existing in the actual use of the existing laser surveying instrument, the following technical scheme is disclosed in this embodiment, a laser surveying instrument for municipal engineering, comprising a surveying instrument body 1, and a laser projector 2 fixedly installed below the front face of the surveying instrument body 1; wherein the top surface of the surveying instrument body 1 is provided with a control panel 3 at the rear, and the laser projector 2 on the front face of the surveying instrument body 1 realizes the positioning and marking of the measurement points of the municipal engineering; the bottom surface of the surveying instrument body 1 is provided with a positioning mechanism, and the positioning mechanism comprises a positioning platform 4.

[0044] The positioning mechanism comprises a positioning plugboard 10, the inner ends of the positioning plugboard 10 are elastically penetrated and arranged on the left and right sides inside the positioning platform 4, the upper ends of the positioning plugboard 10 are slidingly inserted into the inside left and right sides of the surveying instrument body 1, and the bottom surface of the surveying instrument body 1 is inserted into the inside center position of the positioning platform 4, thereby improving the stability during the measurement and positioning marking.

[0045] As Figures 1-2 shown, when it is necessary to install and position the surveying instrument body 1 through the positioning platform 4, the elastically connected positioning plugboard 10 on the left and right sides of the positioning platform 4 is slid outward, and then the lock pin at the bottom end of the surveying instrument body 1 is inserted into the insertion hole inside the positioning platform 4, so that the positioning platform 4 bears the surveying instrument body 1, and then the elastically connected positioning plugboard 10 slides inward through elastic reset, so that the inner ends of the positioning plugboard 10 are inserted into the left and right sides of the surveying instrument body 1, thereby locking and positioning the surveying instrument body 1, and avoiding dislocation and deviation during subsequent use.

[0046] Further, when the surveying instrument body 1 is used, the control panel 3 arranged above it is used for parameter adjustment, and the laser projector 2 arranged on the front face of the surveying instrument body 1 realizes laser irradiation, thereby realizing the positioning and marking of the measurement points of the municipal engineering.

[0047] In order to solve the problems existing in the actual use of the existing laser plotter, the following technical scheme is disclosed in the embodiment. The bottom surface of the positioning platform 4 is rotationally connected with a main support sleeve 6 at the rear, and the left and right sides of the front of the bottom surface of the positioning platform 4 are rotationally connected with the top end of a vice support sleeve 7. The positioning mechanism comprises the main support sleeve 6 and the vice support sleeve 7, which are arranged in the same size and equal angle distribution mode, and the interiors of the main support sleeve 6 and the vice support sleeve 7 are provided with positioning sliding grooves 11, and the main support sleeve 6 and the vice support sleeve 7 are freely rotated relative to the positioning platform 4 to realize supporting and positioning.

[0048] The middle part of the bottom surface of the positioning platform 4 is provided with a control mechanism, and the control mechanism comprises a bearing installed on the middle part of the bottom surface of the positioning platform 4, and the middle outer wall of the control screw 8 is provided with a control sliding block 9 in a threaded manner. The control mechanism comprises an extension leg 12, and the upper end of the extension leg 12 is slidingly and penetratingly arranged in the interiors of the main support sleeve 6 and the vice support sleeve 7, and the upper end of the extension leg 12 is slidingly connected between the positioning sliding grooves 11 in the interiors of the main support sleeve 6 and the vice support sleeve 7 through a protrusion, thereby improving the stability of the extension leg 12 during lifting.

[0049] The control mechanism comprises a transmission bushing 15, and the transmission bushing 15 is fixedly installed on the lower outer wall of the control sliding block 9. The outer wall of the transmission bushing 15 is hingedly connected to the inner end of a turnover connecting rod 16 at equal angles, and the outer end of the turnover connecting rod 16 is hingedly connected to the inner wall below of the main support sleeve 6 and the vice support sleeve 7 arranged at equal angles. A plug-in lock block 24 is fixedly installed on one side of the upper end of the control sliding block 9 close to the main support sleeve 6, the outer end of the plug-in lock block 24 slidingly enters the interior of the plug-in lock groove 5, and the plug-in lock groove 5 is arranged at the protrusion of the upper end of the extension leg 12 in the interior of the main support sleeve 6, so as to realize positioning of the extension leg 12 and avoid self-sliding.

[0050] As shown in Figures 4-5 When it is necessary to support and position the plotter body 1 and the positioning platform 4, the control screw 8 installed below the positioning platform 4 is manually rotated, the control sliding block 9 threadedly connected with the control screw 8 is limited through the transmission bushing 15 and the turnover connecting rod 16, so that in the process of rotating the control screw 8, the control sliding block 9 threadedly connected with the control screw 8 drives the transmission bushing 15 to move downward synchronously, and then drives the turnover connecting rod 16 hingedly connected to rotate, so that the turnover connecting rod 16 abuts against the main support sleeve 6 and the vice support sleeve 7 hingedly connected at the outer end to tilt outward synchronously, thereby forming a triangular supporting mode, and improving the stability of supporting the plotter body 1 during surveying.

[0051] As shown in Figures 6-7As shown, the control slider 9 below the positioning platform 4 drives the fixedly connected plug-in lock block 24 on the outer side to descend synchronously during the downward sliding process, and then separates from the plug-in lock slot 5 at the protruding end of the extended support leg 12, so that the extended support leg 12 inside the main support sleeve 6 can be adjusted in lifting, and vice versa. The plug-in lock block 24 is limited to the extended support leg 12 to avoid independent sliding during the transfer movement.

[0052] In order to solve the problems existing in the actual use of the existing laser mapping instrument, the technical scheme is disclosed in the embodiment, the control mechanism comprises a guide screw 13, the guide screw 13 is rotatably installed in the positioning sliding groove 11 on the outer side 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 convenient for rotating operation, and the guide screw 13 is screwedly connected to the protrusion on the upper end of the extended support leg 12 inside the main support sleeve 6; a synchronous mechanism is arranged below the positioning platform 4, and the synchronous mechanism comprises a main synchronous oil cylinder 17 and a secondary synchronous oil cylinder 18, the main synchronous oil cylinder 17 is fixedly installed inside and below the main support sleeve 6, and the secondary synchronous oil cylinder 18 is fixedly installed inside and below the secondary support sleeve 7, and the upper end of the secondary synchronous oil cylinder 18 is fixedly installed with a sealing top cover 19, and the inner diameter of the secondary synchronous oil cylinder 18 is 1 / 2 of the inner diameter of the main synchronous oil cylinder 17.

[0053] The synchronous mechanism comprises a synchronous piston rod 20, the lower end of the synchronous piston rod 20 is slidably arranged inside the main synchronous oil cylinder 17 and the secondary synchronous oil cylinder 18, the inside of the main synchronous oil cylinder 17 and the secondary synchronous oil cylinder 18 is connected to the lower end of the synchronous piston rod 20 through a contact spring 21, the synchronous piston rod 20 inside the secondary synchronous oil cylinder 18 is connected to the sealing top cover 19 through a sealing ring, so as to prevent oil from overflowing; the synchronous mechanism comprises a main conveying pipeline 22 and a secondary conveying pipeline 23, the lower end of the main conveying pipeline 22 is connected to the inside below the main synchronous oil cylinder 17, so that the oil in the main conveying pipeline 22 is located at the lower end of the synchronous piston rod 20, and after the oil is extruded by the synchronous piston rod 20 descending, the oil is conveyed through the main conveying pipeline 22.

[0054] The lower end of the secondary conveying pipeline 23 of the synchronous mechanism is connected to the inside above the secondary synchronous oil cylinder 18, and the upper ends of the symmetrically arranged secondary conveying pipelines 23 are connected to the upper end of the main conveying pipeline 22, so that the oil in the secondary conveying pipeline 23 is conveyed to the space between the sealing top cover 19 and the lower piston of the synchronous piston rod 20, and the oil is conveyed to the inside of the secondary conveying pipeline 23, extruding the synchronous piston rod 20 inside the secondary synchronous oil cylinder 18 to descend.

[0055] As Figure 8As shown, when it is necessary to adjust the length of the extended support leg 12, the guide screw 13 is driven by rotating the adjustment knob 14 on the outside of the main support sleeve 6. The extended support leg 12, which is threadedly connected to the guide screw 13, is limited by the main support sleeve 6 so that the rotating guide screw 13 can drive the extended support leg 12 to move downward, thereby sliding out of the inner lifting length of the main support sleeve 6 to adapt to the support range under different usage requirements.

[0056] like Figures 9-11 As shown, during the descent of the extended support leg 12 inside the main support sleeve 6, it drives the internally installed synchronous piston rod 20 to move downwards into the main synchronous cylinder 17, thereby squeezing the oil inside the main synchronous cylinder 17 into the through-connected main delivery pipe 22. At the same time, the main delivery pipe 22 delivers the oil to the auxiliary delivery pipes 23 on the left and right sides, so that the oil can be 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. After continuous pressurization, it drives the synchronous piston rod 20 and the extended support 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 synchronously fill the auxiliary synchronous cylinders 18 on the left and right sides, so that the descent length of the synchronous piston rod 20 and the extended support leg 12 set at equal angles is the same). Thus, the support length is increased by the extended support leg 12 set at equal angles to adapt to the usage requirements under different conditions.

[0057] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A municipal engineering laser mapping instrument, comprising a mapping instrument body (1), and a laser projector (2) fixedly installed below the front face of the mapping instrument body (1); wherein A control panel (3) is arranged at the top face of the mapping instrument body (1), and cooperates with the laser projector (2) on the front face of the mapping instrument body (1) to realize the positioning and marking of the measurement points of the municipal engineering; It is characterized in that it further comprises: A positioning mechanism is arranged on the bottom face of the mapping instrument body (1), and comprises a positioning platform (4), and a main support sleeve (6) is rotatably connected to the rear bottom face of the positioning platform (4), and the left and right sides of the front bottom face of the positioning platform (4) are rotatably connected to the top ends of a pair of auxiliary support sleeves (7); A regulating mechanism is arranged on the middle bottom face of the positioning platform (4), and comprises a regulating screw rod (8) with a bearing installed on the middle bottom face of the positioning platform (4), and a regulating sliding block (9) is threadedly arranged on the middle outer wall of the regulating screw rod (8); A synchronous mechanism is arranged below the positioning platform (4), and comprises a main synchronous oil cylinder (17) and an auxiliary synchronous oil cylinder (18), the main synchronous oil cylinder (17) is fixedly installed inside and below the main support sleeve (6), the auxiliary synchronous oil cylinder (18) is fixedly installed inside and below the auxiliary support sleeve (7), the upper ends of the auxiliary synchronous oil cylinder (18) are fixedly installed with sealing top covers (19), and the inner diameter of the auxiliary synchronous oil cylinder (18) is 1 / 2 of the inner diameter of the main synchronous oil cylinder (17); The synchronous mechanism comprises a synchronous piston rod (20), the lower end of the synchronous piston rod (20) is slidably arranged inside the main synchronous oil cylinder (17) and the auxiliary synchronous oil cylinder (18), the inside of the main synchronous oil cylinder (17) and the auxiliary synchronous oil cylinder (18) are connected to the lower end of the synchronous piston rod (20) through a contact spring (21), the synchronous piston rod (20) inside the auxiliary synchronous oil cylinder (18) is connected to the sealing top cover (19) through a sealing ring, so as to prevent oil from overflowing; The synchronous mechanism comprises a main delivery pipeline (22) and an auxiliary delivery pipeline (23), the lower end of the main delivery pipeline (22) is connected to the inside and below of the main synchronous oil cylinder (17), so that the oil is located at the lower end of the synchronous piston rod (20) inside the main delivery pipeline (22), and after the oil is extruded by the descending of the synchronous piston rod (20), it is delivered through the main delivery pipeline (22).

2. The laser mapping instrument for municipal engineering of claim 1, wherein: The positioning mechanism comprises a positioning plug plate (10), the inner ends of the positioning plug plate (10) are elastically and penetratively arranged on the left and right sides inside the positioning platform (4), the upper ends of the positioning plug plate (10) are slidably and plug-connected to the left and right sides inside the mapping instrument body (1), and the bottom face of the mapping instrument body (1) is plug-connected to the inner center position of the positioning platform (4), so as to improve the stability during the measurement and positioning marking.

3. The laser plotter for municipal works according to claim 2, characterized in that: The positioning mechanism comprises a main supporting sleeve (6) and a secondary supporting sleeve (7) which are arranged in the same size and equiangular distribution, and the inside of the main supporting sleeve (6) and the secondary supporting sleeve (7) is provided with a positioning sliding groove (11), and the main supporting sleeve (6) and the secondary supporting sleeve (7) rotate relative to the positioning platform (4) to realize supporting positioning.

4. The laser mapping device for municipal works as claimed in claim 1, wherein: The regulating mechanism comprises an extension leg (12), the upper end of the extension leg (12) is slidably arranged in the inside of the main supporting sleeve (6) and the secondary supporting sleeve (7), and the upper end of the extension leg (12) is slidably connected with the positioning sliding groove (11) in the inside of the main supporting sleeve (6) and the secondary supporting sleeve (7) through a protrusion, so as to improve the stability of the extension leg (12) during lifting.

5. The laser plotter for municipal works as claimed in claim 4 wherein: The regulating mechanism comprises a guide screw (13), the guide screw (13) is rotatably installed in the positioning sliding groove (11) outside the main supporting sleeve (6) through a bearing, the lower end of the guide screw (13) is fixedly installed with a regulating knob (14) convenient for rotating operation, and the guide screw (13) is threadedly connected with the protrusion on the upper end of the extension leg (12) in the inside of the main supporting sleeve (6).

6. The laser plotter for municipal works as claimed in claim 5 wherein: The regulating mechanism comprises a transmission bushing (15), the transmission bushing (15) is fixedly installed below the outer wall of the regulating sliding block (9), the outer wall of the transmission bushing (15) is hingedly connected with the inner end of the overturning connecting rod (16) at equal angles, and the outer end of the overturning connecting rod (16) is hingedly connected with the inner wall below of the main supporting sleeve (6) and the secondary supporting sleeve (7) arranged at equal angles. The upper end of the regulating sliding block (9) is fixedly installed with a plug-in locking block (24) on one side close to the main supporting sleeve (6), the outer end of the plug-in locking block (24) slides into the inside of the plug-in locking groove (5), and the plug-in locking groove (5) is arranged at the protrusion on the upper end of the extension leg (12) in the inside of the main supporting sleeve (6), so as to realize positioning of the extension leg (12) and avoid self-sliding.

7. The laser plotter for municipal works as claimed in claim 1 wherein: The lower end of the secondary conveying pipeline (23) of the synchronous mechanism is connected with the inside of the secondary synchronous oil cylinder (18), the upper end of the symmetrically arranged secondary conveying pipeline (23) is connected with the upper end of the main conveying pipeline (22), so that the oil in the inside of the secondary conveying pipeline (23) is conveyed to the space between the sealing top cover (19) and the piston below the synchronous piston rod (20), the oil is conveyed to the inside of the secondary conveying pipeline (23), and the synchronous piston rod (20) in the inside of the secondary synchronous oil cylinder (18) is extruded to descend.

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