Fixing base for hydraulic engineering surveying and mapping instrument
By introducing position adjustment components and reversing components on the fixed base of water conservancy engineering surveying and mapping instruments, the problem of low fine-tuning efficiency of surveying and mapping instruments is solved, and fast and efficient position fine-tuning is achieved.
Patent Information
- Application Number
- CN202421351123.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-13
- Publication Date
- 2025-02-07
- Estimated Expiration
- 2034-06-13
AI Technical Summary
In water conservancy engineering surveying and mapping, the fine-tuning efficiency of surveying and mapping instruments is low, mainly due to the long time required for calibration and adjustment of the tripod.
It provides a fixed base for surveying and mapping instruments for water conservancy engineering, and fine-tuning the position of surveying and mapping instruments is achieved through position adjustment components and reversing components, avoiding the calibration adjustment required for changes in tripod position.
The fine-tuning of the position of the surveying and mapping instrument can be completed without moving the position of the tripod, which significantly reduces the time required for fine-tuning and improves the efficiency of fine-tuning of the position of the surveying and mapping instrument.
Smart Images
Figure CN222437543U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of water conservancy engineering surveying and mapping, and in particular to a fixed base for a water conservancy engineering surveying and mapping instrument. Background Art
[0002] With the continuous development and improvement of water conservancy projects, surveying and mapping technology plays a vital role in it. Water conservancy project surveying and mapping involves many aspects such as terrain measurement, water level monitoring, and embankment inspection. Its accuracy and efficiency directly affect the quality and progress of the project. Therefore, the stability and accuracy of surveying and mapping instruments are extremely high.
[0003] In the surveying and mapping of water conservancy projects, surveying and mapping instruments include total stations and levels. When using surveying and mapping instruments for surveying and mapping work, a special support base is required to fix the surveying and mapping instruments to ensure the stability and accuracy of the measurement process.
[0004] The base is usually composed of a tripod and a base. The surveying and mapping instrument is fixedly installed on the base. When fine-tuning the position of the surveying and mapping instrument, it is necessary to move the tripod. After the position of the tripod is changed, the tripod needs to be recalibrated and adjusted. The calibration and adjustment of the tripod takes a long time, which results in a long time for fine-tuning the surveying and mapping instrument, thereby resulting in the defect of low fine-tuning efficiency of the surveying and mapping instrument. Utility Model Content
[0005] In order to improve the efficiency of fine-tuning the position of a surveying and mapping instrument, the present application provides a fixed base for a water conservancy engineering surveying and mapping instrument.
[0006] The present application provides a fixed base for a water conservancy engineering surveying and mapping instrument using the following technical solution:
[0007] A fixed base for a water conservancy engineering surveying and mapping instrument, comprising a tripod and:
[0008] An installation platform, the installation platform is fixed to the tripod, a positioning cavity is provided on the installation platform, a positioning platform is provided in the positioning cavity, and the positioning platform is used to install the surveying and mapping instrument;
[0009] The positioning assembly includes a guide plate and a limit block. The guide plate passes through the positioning platform and the two are slidably adapted. Both ends of the guide plate are connected to the mounting platform. Two limit blocks are provided. The two limit blocks are respectively arranged on both sides of the positioning platform. The limit blocks abut against the positioning platform, and the limit blocks are slidably connected with the guide plate along the length direction of the guide plate. The inner thread of the limit block is connected with a positioning bolt, and the positioning bolt abuts against the mounting platform.
[0010] The reversing assembly is used to adjust the movement direction of the positioning platform.
[0011] By adopting the above technical solution, when the position of the surveying and mapping instrument needs to be fine-tuned, the positioning bolt is no longer pressed against the mounting platform, and then the moving direction of the surveying and mapping instrument is determined by the reversing component, and then the position of the surveying and mapping instrument is adjusted by moving the position of the adjustment table on the guide plate. In the above manner, the position of the surveying and mapping instrument can be fine-tuned without moving the position of the tripod, which reduces the time for calibrating and adjusting the tripod, thereby improving the efficiency of fine-tuning the position of the surveying and mapping instrument.
[0012] Optionally, the mounting platform includes a connecting seat and a mounting seat, the connecting seat is fixed to the tripod, the mounting seat is arranged on a side of the connecting seat away from the tripod, an adjustment mechanism is arranged between the connecting seat and the mounting seat, and the adjustment mechanism includes an angle adjustment component and an azimuth adjustment component;
[0013] The angle adjustment assembly is provided with multiple groups around the central axis of the mounting platform, and the angle adjustment assembly includes an adjustment rod and a fixing seat, the adjustment rod is slidably connected in the fixing seat, one end of the adjustment rod away from the fixing seat is connected to the mounting seat, and one end of the fixing seat away from the adjustment rod is connected to the connecting seat, and an adjustment sleeve is threadedly connected to the adjustment rod, and the adjustment sleeve is rotatably connected to the fixing seat;
[0014] The azimuth adjustment assembly is used to enable the angle adjustment assembly to rotate around the central axis of the mounting platform.
[0015] By adopting the above technical solution, the azimuth of the angle change of the surveying and mapping instrument is determined by the azimuth adjustment component, and then the adjustment sleeve is rotated to make the adjustment rod slide in the fixed seat, so that the lengths of multiple adjustment rods extending out of the fixed seat are different, thereby making the surveying and mapping instrument change at different angles.
[0016] Optionally, the orientation adjustment assembly includes a first turntable and a second turntable, the first turntable is rotatably connected to a connecting seat, a ratchet is fixed on the first turntable, a pawl that is rotatably connected to the connecting seat and is adapted to engage with the ratchet, the fixed seat is hinged to the connecting seat, the second turntable is rotatably connected to a mounting seat, and the adjustment rod is hinged to the second turntable.
[0017] By adopting the above technical solution, after the ratchet and the pawl are separated, the angle adjustment assembly is rotated around the central axis of the connecting seat by rotating the first turntable, so that the angle of the surveying and mapping instrument in different directions changes; after the angle adjustment of the surveying and mapping instrument is completed, the pawl is engaged with the ratchet, so that the first turntable remains stable in a stationary state.
[0018] Optionally, a torsion spring is installed at the rotational connection between the pawl and the connecting seat.
[0019] By adopting the above technical solution, after the pawl is loosened, the torsion spring releases its elastic force so that the pawl automatically engages with the ratchet wheel.
[0020] Optionally, a blocking rod is threadedly connected to the connecting seat, and the blocking rod is used to separate the pawl and the ratchet wheel.
[0021] By adopting the above technical solution, after the pawl is separated from the ratchet, the pawl is intercepted by the blocking rod, so that the pawl will not rotate and engage with the ratchet.
[0022] Optionally, the adjustment mechanism also includes a support assembly, the support assembly includes a first connecting rod, a second connecting rod and a sliding rod, one end of the first connecting rod is hinged to the connecting seat ball, one end of the second connecting rod is hinged to the mounting seat ball, the sliding rod is arranged between the first connecting rod and the second connecting rod, one end of the sliding rod extends into the first connecting rod and the two are slidably adapted, a first fastening bolt is threadedly connected to the first connecting rod, the first fastening bolt is used to tighten the sliding rod, the other end of the sliding rod extends into the second connecting rod and the two are slidably adapted, a second fastening bolt is threadedly connected to the second connecting rod, the second fastening bolt is used to tighten the sliding rod.
[0023] By adopting the above technical scheme, before adjusting the position of the angle adjustment component through the azimuth adjustment component, the first fastening bolt and the second fastening bolt are both pressed against the sliding rod, thereby fixing the connecting seat and the mounting seat through the support component, thereby facilitating the azimuth adjustment component to adjust the position of the angle adjustment component; in the process of adjusting the position of the angle adjustment component through the azimuth adjustment component, the first fastening bolt and the second fastening bolt are not pressed against the sliding rod, and the first connecting rod is ball-hinged with the connecting seat, and the second connecting rod is ball-hinged with the mounting seat, thereby not interfering with the angle change of the mounting seat; after adjusting the position of the angle adjustment component through the azimuth adjustment component, the first fastening bolt and the second fastening bolt are both pressed against the sliding rod, thereby preventing the length of the support component from changing, thereby enhancing the stability of the mounting seat.
[0024] Optionally, a through hole for the adjusting rod to slide is provided in the fixing seat, a guide block is fixed in the through hole of the fixing seat, and a guide groove adapted to slide with the guide block is provided on the outer wall of the adjusting rod.
[0025] By adopting the above technical solution, when the adjusting rod slides in the fixing seat, the guide block slides in the guide groove, so that the guide block prevents the adjusting rod from rotating with the adjusting sleeve, thereby achieving the function of limiting and guiding the adjusting rod.
[0026] Optionally, the reversing assembly includes a reversing ring, which is arranged in the positioning cavity, the reversing ring is rotatably connected to the mounting platform, and both ends of the guide plate are fixed to the reversing ring.
[0027] By adopting the above technical solution, the guide plate is rotated by rotating the reversing ring, thereby adjusting the movement direction of the adjustment sleeve, thereby achieving the effect of adjusting the movement direction of the surveying and mapping instrument.
[0028] In summary, the present application includes at least one of the following beneficial technical effects:
[0029] 1. First, remove the positioning bolts from the mounting platform, then rotate the reversing ring to determine the moving direction of the surveying and mapping instrument, and then adjust the position of the surveying and mapping instrument by moving the position of the adjustment table on the guide plate. The position of the surveying and mapping instrument can be fine-tuned without moving the position of the tripod, which improves the efficiency of fine-tuning the position of the surveying and mapping instrument.
[0030] 2. After the ratchet and the pawl are separated, the pawl is intercepted by the blocking rod so that the pawl will not rotate and engage with the ratchet. Then, the angle adjustment assembly is rotated around the central axis of the connecting seat by rotating the first turntable, so that the angle of the surveying and mapping instrument changes in different directions. After the angle adjustment of the surveying and mapping instrument is completed, the blocking rod is unscrewed from the connecting seat. At this time, the torsion spring releases the elastic force so that the pawl automatically engages with the ratchet, so that the first turntable remains stable in a stationary state. BRIEF DESCRIPTION OF THE DRAWINGS
[0031] Figure 1 This is a structural schematic diagram of a fixed base for a water conservancy engineering surveying and mapping instrument according to an embodiment of the present application;
[0032] Figure 2 It is a structural schematic diagram showing a method for adjusting the position of the positioning platform in an embodiment of the present application;
[0033] Figure 3 It is a partial schematic diagram showing the specific structure of the regulating mechanism in the embodiment of the present application;
[0034] Figure 4 It is a partial schematic diagram of the embodiment of the present application to embody the fixing method of the first turntable;
[0035] Figure 5 It is a cross-sectional view showing the positions of the guide block and the guide groove in the embodiment of the present application.
[0036] In the figure, 1, tripod; 2, mounting platform; 21, connecting seat; 211, ratchet; 212, torsion spring; 213, stop rod; 22, mounting seat; 221, adjustment cavity; 222, adjustment platform; 223, reversing groove; 3, adjustment assembly; 31, guide plate; 311, guide groove; 312, guide rod; 32, limit block; 321, positioning bolt; 4, reversing assembly; 41, reversing ring; 42, reversing rod ; 5. Angle adjustment assembly; 51. Adjustment rod; 511. Adjustment sleeve; 512. Guide groove; 52. Fixed seat; 521. Through hole; 522. Guide block; 6. Azimuth adjustment assembly; 61. First turntable; 611. Ratchet; 62. Second turntable; 7. Support assembly; 71. First connecting rod; 711. First fastening bolt; 72. Second connecting rod; 721. Second fastening bolt; 73. Sliding rod. DETAILED DESCRIPTION
[0037] The following is combined with Figure 1-5This application is described in further detail.
[0038] The embodiment of the present application discloses a fixed base for a water conservancy engineering surveying and mapping instrument.
[0039] refer to Figure 1 A fixed base for a water conservancy engineering surveying and mapping instrument includes a tripod 1 and a mounting platform 2. The tripod 1 is a prior art and will not be described in detail in this application. The mounting platform 2 includes a connecting seat 21 and a mounting seat 22. The connecting seat 21 is arranged between the tripod 1 and the mounting seat 22. The side of the connecting seat 21 facing away from the mounting seat 22 is fixed to the tripod 1. The surveying and mapping instrument is arranged in the mounting seat 22. The surveying and mapping instrument is not shown in the figure. A positioning component 3 and a reversing component 4 for adjusting the position of the surveying and mapping instrument are arranged in the mounting seat 22. An adjustment mechanism for adjusting the angle of the surveying and mapping instrument is arranged between the mounting seat 22 and the connecting seat 21.
[0040] The moving direction of the surveying and mapping instrument is adjusted by the reversing component 4, the position of the surveying and mapping instrument is adjusted by the position adjustment component 3, and finally the angle of the surveying and mapping instrument is adjusted by the adjustment mechanism, thereby achieving fine adjustment of the surveying and mapping instrument.
[0041] refer to Figure 1 and Figure 2 A positioning cavity 221 is provided on a side of the mounting seat 22 away from the connecting seat 21 , and a positioning platform 222 is provided in the positioning cavity 221 , on which the surveying and mapping instrument is fixedly mounted.
[0042] refer to Figure 2 The reversing assembly 4 includes a reversing ring 41 and a reversing rod 42. The mounting seat 22 has a reversing groove 223 formed in an annular inner wall at the adjusting cavity 221. The reversing ring 41 is provided with one reversing ring 41, which is arranged in the reversing groove 223. The outer wall of the reversing ring 41 is rotatably connected to the inner wall of the mounting seat 22 at the reversing groove 223. A plurality of reversing rods 42 are evenly spaced around the central axis of the reversing ring 41. In the embodiment of the present application, four reversing rods 42 are provided, and the reversing rods 42 are fixed to the reversing ring 41.
[0043] refer to Figure 2The positioning assembly 3 includes a guide plate 31 and a limit block 32. The guide plate 31 is provided with one, and the guide plate 31 passes through the positioning platform 222 and the two are slidably adapted. Both ends of the guide plate 31 are fixed to the inner wall of the reversing ring 41. A guide groove 311 is penetrated in the guide plate 31. The guide plate 31 is fixed with a guide rod 312 at the guide groove 311. Two guide rods 312 are provided. The two guide rods 312 are respectively arranged on both sides of the guide groove 311. Two limit blocks 32 are provided. The two limit blocks 32 are respectively arranged on both sides of the positioning platform 222. The limit block 32 abuts against the positioning platform 222, and the guide rods 312 all pass through the limit block 32. The guide rod 312 is slidably adapted to the limit block 32. The limit block 32 is internally threaded with a positioning bolt 321, and the positioning bolt 321 abuts against the inner bottom wall of the mounting seat 22 at the positioning cavity 221.
[0044] The staff drives the reversing ring 41 to rotate by toggling the reversing rod 42, and the reversing ring 41 drives the guide plate 31 to rotate; after rotating the guide plate 31 to the desired direction, the staff moves the adjustment platform 222 on the guide plate 31 until the surveying and mapping instrument is moved to the desired position; then the staff moves the limit block 32, and presses the limit block 32 against the adjustment platform 222, and finally the staff rotates the positioning bolt 321 until the positioning bolt 321 is pressed tightly against the mounting seat 22.
[0045] refer to Figure 3 The adjustment mechanism includes a support assembly 7. Two support assemblies 7 are provided. The two support assemblies 7 are arranged opposite to each other. The support assembly 7 includes a first connecting rod 71, a second connecting rod 72 and a sliding rod 73. The sliding rod 73 is arranged between the first connecting rod 71 and the second connecting rod 72. One end of the sliding rod 73 extends into the first connecting rod 71 and the two are slidably adapted. The other end of the sliding rod 73 extends into the second connecting rod 72 and the two are slidably adapted. One end of the first connecting rod 71 away from the sliding rod 73 is ball-jointed to the connecting seat 21, and one end of the second connecting rod 72 away from the sliding rod 73 is ball-jointed to the mounting seat 22.
[0046] refer to Figure 3 A first fastening bolt 711 is threadedly connected to the first connecting rod 71 , and the first fastening bolt 711 is used to tighten the sliding rod 73 . A second fastening bolt 721 is threadedly connected to the second connecting rod 72 , and the second fastening bolt 721 is used to tighten the sliding rod 73 .
[0047] refer to Figure 3 and Figure 4The adjustment mechanism also includes an azimuth adjustment component 6, which includes a first turntable 61 and a second turntable 62. The bottom wall of the first turntable 61 is rotatably connected to the upper surface of the connecting seat 21. A ratchet 611 is sleeved on the first turntable 61 and the two are fixed to each other. Both sides of the ratchet 611 are provided with pawls 211 that are adapted to the ratchet 611. The pawl 211 is rotatably connected to the connecting seat 21. A torsion spring 212 is installed at the rotating connection between the pawl 211 and the connecting seat 21. The second turntable 62 is coaxial with the first turntable 61, and the upper surface of the second turntable 62 is rotatably connected to the bottom wall of the mounting seat 22.
[0048] refer to Figure 4 A blocking rod 213 is provided on the upper surface of the connecting seat 21 at one side of the pawl 211 , and the blocking rod 213 is threadedly connected to the connecting seat 21 , and the blocking rod 213 is used to separate the pawl 211 and the ratchet 611 .
[0049] refer to Figure 3 and Figure 5 The adjustment mechanism also includes an angle adjustment component 5, and multiple groups of angle adjustment components 5 are arranged around the central axis of the first rotating disk 61. In the embodiment of the present application, two groups of angle adjustment components 5 are arranged, and the two groups of angle adjustment components 5 are arranged opposite to each other. The angle adjustment component 5 includes an adjustment rod 51 and a fixed seat 52. The adjustment rod 51 is slidably connected in the fixed seat 52. A through hole 521 for sliding of the adjustment rod 51 is provided in the fixed seat 52. A guide block 522 is fixed in the through hole 521 of the fixed seat 52. A guide groove 512 is provided on the outer wall of the adjustment rod 51 to slide with the guide block 522. One end of the adjustment rod 51 away from the fixed seat 52 is hinged to the second rotating disk 62, and one end of the fixed seat 52 away from the adjustment rod 51 is hinged to the first rotating disk 61. An adjustment sleeve 511 is threadedly connected to the adjustment rod 51, and the adjustment sleeve 511 is rotatably connected to the fixed seat 52.
[0050] Before adjusting the angle of the surveying and mapping instrument, the staff screws the first fastening bolt 711 and the second fastening bolt 721, thereby pressing the first fastening bolt 711 and the second fastening bolt 721 against the sliding rod 73. The staff then moves the pawl 211 away from the ratchet 611, and then screws the blocking rod 213 onto the connecting seat 21, thereby blocking the pawl 211 with the blocking rod 213. The staff then rotates the first turntable 61 to drive the angle adjustment assembly 5 to rotate until the angle adjustment assembly 5 is rotated to the desired position.
[0051] After rotating the angle adjustment assembly 5 to the desired position, the staff first loosens the first fastening bolt 711 and the second fastening bolt 721. At this time, the first fastening bolt 711 and the second fastening bolt 721 no longer resist the sliding rod 73. Then the staff rotates the adjustment sleeve 511 to drive the adjustment rod 51 to slide in the fixed seat 52, thereby adjusting the inclination angle of the mounting seat 22 by controlling the length of the adjustment rod 51 extending out of the fixed seat 52, thereby adjusting the inclination angle of the surveying and mapping instrument; during the sliding process of the adjustment rod 51 in the fixed seat 52, the guide block 522 slides in the guide groove 512.
[0052] After the angle adjustment of the surveying and mapping instrument is completed, the staff unscrews the blocking rod 213, so that the torsion spring 212 releases the elastic force to drive the pawl 211 to engage with the ratchet 611, and then the staff tightens the first fastening bolt 711 and the second fastening bolt 721, so that the first fastening bolt 711 and the second fastening bolt 721 tighten the sliding rod 73.
[0053] The implementation principle of the fixed base for a water conservancy engineering surveying and mapping instrument in the embodiment of the present application is as follows: the staff rotates the reversing ring 41 to rotate the guide plate 31 to the desired direction, and then the staff moves the adjustment platform 222 on the guide plate 31, and finally fixes the adjustment platform 222 on the guide plate 31 through the limit block 32 and the positioning bolt; the staff rotates the adjustment sleeve 511 to drive the adjustment rod 51 to slide in the fixed seat 52, thereby adjusting the inclination angle of the mounting seat 22 by controlling the length of the adjustment rod 51 extending out of the fixed seat 52, thereby adjusting the inclination angle of the surveying and mapping instrument. Through the above structure, the efficiency of fine-tuning the position of the surveying and mapping instrument is improved.
[0054] The embodiments of this specific implementation method are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Therefore, all equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.
Claims
1. A fixed base for a water conservancy engineering surveying and mapping instrument, comprising a tripod (1), characterized in that: Also includes: A mounting platform (2), the mounting platform (2) being fixed to the tripod (1), a positioning cavity (221) being provided on the mounting platform (2), a positioning platform (222) being provided in the positioning cavity (221), and the positioning platform (222) being used for mounting a surveying and mapping instrument; A positioning assembly (3), the positioning assembly (3) comprising a guide plate (31) and a limit block (32), the guide plate (31) passing through the positioning platform (222) and the two are slidably adapted, both ends of the guide plate (31) are connected to the mounting platform (2), two limit blocks (32) are provided, the two limit blocks (32) are respectively provided on both sides of the positioning platform (222), the limit block (32) abuts against the positioning platform (222), and the limit block (32) is slidably connected to the guide plate (31) along the length direction of the guide plate (31), and a positioning bolt (321) is connected to the inner thread of the limit block (32), and the positioning bolt (321) abuts against the mounting platform (2); A reversing component (4), the reversing component (4) is used to adjust the movement direction of the positioning platform (222).
2. The fixed base for a water conservancy engineering surveying and mapping instrument according to claim 1, characterized in that: The mounting platform (2) comprises a connecting seat (21) and a mounting seat (22), the connecting seat (21) being fixed to the tripod (1), the mounting seat (22) being arranged on a side of the connecting seat (21) away from the tripod (1), an adjustment mechanism being arranged between the connecting seat (21) and the mounting seat (22), the adjustment mechanism comprising an angle adjustment component (5) and an azimuth adjustment component (6); The angle adjustment assembly (5) is provided with a plurality of groups around the central axis of the mounting platform (2), and the angle adjustment assembly (5) comprises an adjustment rod (51) and a fixing seat (52), the adjustment rod (51) is slidably connected in the fixing seat (52), one end of the adjustment rod (51) away from the fixing seat (52) is connected to the mounting seat (22), one end of the fixing seat (52) away from the adjustment rod (51) is connected to the connecting seat (21), an adjustment sleeve (511) is threadedly connected to the adjustment rod (51), and the adjustment sleeve (511) is rotatably connected to the fixing seat (52); The azimuth adjustment component (6) is used to enable the angle adjustment component (5) to rotate around the central axis of the installation platform (2).
3. The fixed base for a water conservancy engineering surveying and mapping instrument according to claim 2, characterized in that: The orientation adjustment assembly (6) comprises a first rotating disk (61) and a second rotating disk (62), the first rotating disk (61) is rotatably connected to the connecting seat (21), a ratchet (611) is fixedly provided on the first rotating disk (61), a ratchet pawl (211) which is rotatably connected to the connecting seat (21) and is adapted to be snap-fitted with the ratchet (611), the fixing seat (52) is hinged to the connecting seat (21), the second rotating disk (62) is rotatably connected to the mounting seat (22), and the adjustment rod (51) is hinged to the second rotating disk (62).
4. The fixed base for a water conservancy engineering surveying and mapping instrument according to claim 3 is characterized by: A torsion spring (212) is installed at the rotation connection between the ratchet pawl (211) and the connecting seat (21).
5. The fixed base for a water conservancy engineering surveying and mapping instrument according to claim 4, characterized in that: A blocking rod (213) is threadedly connected to the connection seat (21), and the blocking rod (213) is used to separate the pawl (211) and the ratchet wheel (611).
6. The fixed base for a water conservancy engineering surveying and mapping instrument according to claim 2, characterized in that: The adjustment mechanism also includes a support assembly (7), which includes a first connecting rod (71), a second connecting rod (72) and a sliding rod (73). One end of the first connecting rod (71) is ball-jointed with the connecting seat (21), and one end of the second connecting rod (72) is ball-jointed with the mounting seat (22). The sliding rod (73) is arranged between the first connecting rod (71) and the second connecting rod (72). One end of the sliding rod (73) extends into the first connecting rod (71) and the two are slidably matched. A first fastening bolt (711) is threadedly connected to the first connecting rod (71), and the first fastening bolt (711) is used to tighten the sliding rod (73). The other end of the sliding rod (73) extends into the second connecting rod (72), and the two are slidably matched. A second fastening bolt (721) is threadedly connected to the second connecting rod (72), and the second fastening bolt (721) is used to tighten the sliding rod (73).
7. The fixed base for a water conservancy engineering surveying and mapping instrument according to claim 2, characterized in that: The fixing seat (52) is provided with a through hole (521) for the adjusting rod (51) to slide, the fixing seat (52) is provided with a guide block (522) in the through hole (521), and the outer wall of the adjusting rod (51) is provided with a guide groove (512) which is slidably matched with the guide block (522).
8. The fixed base for a water conservancy engineering surveying and mapping instrument according to claim 1, characterized in that: The reversing assembly (4) comprises a reversing ring (41), which is arranged in the position adjustment cavity (221), the reversing ring (41) is rotatably connected to the mounting platform (2), and both ends of the guide plate (31) are fixed to the reversing ring (41).