Total station for cadastral surveying and mapping

Abstract

The embodiment of the invention provides a total station for cadastral surveying and mapping, and relates to the technical field of total stations. A total station for cadastral surveying and mapping comprises a main machine, expansion films are oppositely arranged above the main machine, the expansion films are connected through a supporting rod capable of rotating in a storage box, one end of the supporting rod is connected with a rotating seat connected with the inner wall of the storage box, and expansion cavities are formed in the expansion films; second air outlets evenly formed in the peripheral face of the supporting rod are communicated with the expansion cavity, a piston pipe is fixed to the bottom face in the storage box, an air pipe is connected from the other end of the piston pipe to the interior of the supporting rod, and a pressurizing rod moving along with the supporting rod is arranged inwards from an opening in one end of the piston pipe. After the motor is started, the worm drives the worm wheel through the worm, and the supporting rod is driven to turn upwards. And then the air flow enters the supporting rod through the air pipe and then enters the expansion cavity through the second air outlet, so that the expansion film expands and is flatly laid above the main machine, and the sunshade effect is achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of total stations, and in particular relates to a total station for cadastral surveying and mapping. Background Art

[0002] As a surveying and mapping instrument integrating optics, mechanics and electronics, the total station is widely used in cadastral surveying, engineering surveying and other fields. However, when conducting cadastral surveying in outdoor high-temperature environments, in order to reduce the impact of the high-temperature environment on the total station, the existing technology would equip the total station with a parasol or manually pull a sunshade cloth to cover the total station.

[0003] For example, in the prior art (publication number CN220380518U, patent name is a patent application for a cadastral surveying total station), the pulled out sunshade cloth is limited by the setting of a shielding mechanism under the limiting action of the limiting mechanism, and the sunshade cloth prevents the total station body from being exposed to strong light. In the process of implementing this technical solution, it is found that there are at least the following problems in the prior art.

[0004] In the above patent, the sunshade cloth used for sunshade is manually pulled out and covered on the top of the total station, which increases the complexity of operation. At the same time, since the sunshade cloth is attached to the surface above the total station, after the sunshade cloth is attached to the surface of the instrument, the sunshade cloth itself will absorb heat and gradually heat up when the sun shines on the sunshade cloth. This heat will be directly transferred to the surface of the total station, causing the temperature of the instrument to rise, which may aggravate the temperature rise problem inside the instrument, so the sunshade effect is not ideal. Summary of the invention

[0005] The present application aims to solve at least one of the technical problems of poor sunshade effect in the prior art. To this end, the present application proposes a total station for cadastral surveying and mapping.

[0006] To achieve the above-mentioned purpose, the specific technical scheme of the present invention is as follows: a total station for cadastral surveying and mapping, including a main unit, an expansion membrane is relatively arranged above the main unit, the expansion membrane is connected through a support rod that can rotate inside a storage box, one end of the support rod is connected to a rotating seat connected to the inner wall of the storage box, an expansion cavity is opened inside the expansion membrane, exhaust ports 2 evenly opened on the outer peripheral surface of the support rod are connected to the expansion cavity, a piston tube is fixed on the inner bottom surface of the storage box, an air pipe is connected to the other end of the piston tube to the inside of the support rod, a pressure rod is arranged inward from the opening at one end of the piston tube and moves together with the support rod, and a piston is fixed at one end of the pressure rod located inside the piston tube.

[0007] Preferably, a movable ring is fixed to one side near the free end of the pressure rod, one end of the reciprocating screw passes through the movable ring, a worm is extended from one end of the reciprocating screw to one end of the storage box, the worm is meshed with a worm wheel fixedly connected to one side of the outer peripheral surface of the support rod, a motor is connected to the end of the worm, one end of the motor extends out of the storage box, and a shielding cover is connected to the outer surface of the storage box. The shielding cover is connected to the outer surface of the motor.

[0008] Preferably, a hose is fixed at the bottom edge of the expansion membrane, and plug interfaces are fixed on the outer circumference of the hose, a magnetic block is fixed to the bottom surface of the expansion membrane, and a plug rod for support and fixation is plugged into the opening at one end of the plug interface.

[0009] Preferably, the outer circumference of the support rod is respectively fixed with a limiting column, and the outer circumference of the limiting column is sleeved with a limit groove tube that can be displaced, a moving rod 1 is fixed to the bottom surface of the limiting column, and a docking tube is extended at one end of the moving rod 1 in the direction of the plug-in rod, and an expansion opening is expanded outward at the opening at one end of the plug-in rod.

[0010] Preferably, the other end of the moving rod is hingedly connected to a push rod, and the other end of the push rod is hingedly connected to a push rod, and the push rod extends downward along the direction of the support rod, and a lifting ring is fixed at the end of the push rod, and the lifting ring is sleeved on the outer circumference of the support rod.

[0011] Preferably, the bottom surface of the outer circumference of the hose is evenly provided with exhaust ports, and a lifting tube is provided between adjacent push rods, and the top end of the lifting tube is fixed to the outer circumference of the support rod.

[0012] Preferably, a moving rod 2 is fixed on the upper surface of the lifting ring, one end of which extends into the interior of the lifting tube, and a top block is fixed on the top of the moving rod 2, and an airway is opened from the outer circumference of the moving rod 2 to the outer circumference of the top block.

[0013] Preferably, a connecting pipe 1 is connected to the bottom surface of the moving rod 1 on the outer circumference of the lifting pipe, and an air inlet is opened from the free end of the connecting pipe to the inside of the lifting pipe.

[0014] Preferably, the opening of the air inlet is communicated with the airway, and a connecting pipe is connected near the lower part of the outer peripheral surface of the lifting pipe, and the other end of the connecting pipe is connected to the adjacent lifting pipe.

[0015] Preferably, a motor cover is fixed to the lower part of the outer circumference of the support rod, a fan is fixed inside the motor cover, a shield cover is sleeved on the outer circumference of the fan, and a connecting pipe 2 extends from the top opening of the motor cover toward the lifting pipe.

[0016] The total station for cadastral surveying and mapping of the present invention has the following advantages: 1. This is a total station for cadastral surveying. During the surveying process, after the motor is started, the worm gear is driven by the worm to drive the support rod to flip upward. At the same time, the reciprocating screw rotates, pushing the pressure rod to move into the piston tube. The piston squeezes the air flow in the piston tube, and the air flow enters the support rod through the air pipe, and then enters the expansion chamber through the exhaust port 2, so that the expansion film expands and spreads flat above the main unit to play a sunshade role.

[0017] 2. This total station for cadastral surveying, when the expansion membrane needs support, one end of the plug rod is inserted into the plug interface and fixed by the magnetic block. As the lifting ring rises, its push rod pushes the push rod, so that the push rod pushes the butt pipe into the expansion port, so that the butt pipe is used as a support point to provide stable support for the expansion membrane.

[0018] 3. When the main unit of this cadastral surveying and mapping total station is used outdoors, the fan is started, and the airflow generated enters the lifting tube through the connecting pipe 2, pushing the top block to the top of the lifting tube. At this time, the airway on the outer periphery of the lifting tube is connected with the connecting pipe 1. As the lifting ring rises, the top rod pushes the push rod to insert the butt joint into the plug rod. The airflow then enters the hose through the air inlet and the plug rod, and is discharged from the exhaust port 1, forming an air curtain around the main unit, effectively blocking the interference of fine sand and gravel.

[0019] 4. This is a total station for cadastral surveying. When the total station is used outdoors, the storage box is rotated. Due to the friction between the rotor and the friction plate, the rotor starts to rotate. The rotor drives two gears one through gear two, thereby opening the guide plate. When the fan is running, the airflow blows toward the operator and equipment through the guide plate, which has a cooling effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the explosion structure of the host and the expansion membrane of the present invention; Figure 3 It is a bottom view structural schematic diagram of the expansion membrane of the present invention; Figure 4 It is a schematic diagram of the structure of the expansion membrane of the present invention from a top view; Figure 5 For the present invention Figure 4 Schematic diagram of the AA section structure; Figure 6 For the present invention Figure 5 The enlarged structural diagram at A in the middle; Figure 7 It is a schematic diagram of the support rod structure of the present invention; Figure 8 For the present invention Figure 7 The enlarged structural diagram at B in the middle; Fig. 9 It is a schematic diagram of the explosion structure of the support rod and the lifting ring of the present invention; Fig.10 It is a schematic diagram of the top view of the support rod structure of the present invention; Fig.11 For the present invention Fig.10 Schematic diagram of the structure of the middle BB section; Fig.12 For the present invention Fig.11 The enlarged structural diagram at C in the middle; Fig.13 It is a schematic diagram of the storage box structure of the present invention; Fig.14 It is a schematic diagram of the damper structure of the present invention.

[0022] Explanation of the markings in the figure: 1. Host; 11. Distance measuring lens; 12. Crossbeam; 13. Friction plate; 2. Storage box; 21. Rotating seat; 211. Shielding cover; 22. Support rod; 221. Worm gear; 222. Exhaust port 2; 223. Limiting column; 23. Piston tube; 231. Air pipe; 24. Lifting tube; 25. Connecting tube; 26. Fan slot; 261. Fan; 27. Air door; 271. Guide plate; 272. Gear 1; 273. Rotating shaft; 274. Gear 2; 275. Rotating wheel; 3. Motor; 31. Worm; 32 , reciprocating screw; 33, pressure rod; 331, moving ring; 332, piston; 4, expansion membrane; 41, hose; 411, exhaust port 1; 412, plug interface; 42, magnetic block; 43, plug-in rod; 431, expansion port; 44, expansion chamber; 5, butt tube; 51, limit groove tube; 52, air inlet; 53, connecting tube 1; 54, moving rod 1; 6, motor cover; 61, connecting tube 2; 62, fan; 7, lifting ring; 71, push rod; 72, moving rod 2; 721, push block; 722, airway; 73, push rod. DETAILED DESCRIPTION

[0023] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] like Figure 1-Figure 2As shown, a total station for cadastral surveying of the present invention comprises a host 1 for measuring, and a ranging lens 11 for measuring on the host 1. When the total station needs to perform measurement, the host 1 can be firmly installed, and then the ranging lens 11 can be used for measurement. At the same time, a beam 12 is fixed above the outer surface of the host 1, and a rotatable storage box 2 is connected above the beam 12, and the storage box 2 has a connecting shaft extending from the bottom surface to the top of the beam 12 for rotation.

[0025] like Figure 2-Figure 7 As shown, an expansion membrane 4 is relatively arranged above the total station, and the expansion membrane 4 is connected to a support rod 22 that can rotate inside the storage box 2. One end of the support rod 22 is connected to a rotating seat 21 connected to the inner wall of the storage box 2, so that the support rod 22 can be flipped with its connection as the axis.

[0026] The interior of the support rod 22 is a hollow structure, and an expansion cavity 44 is provided inside the expansion membrane 4. The second exhaust port 222 evenly provided on the outer peripheral surface of the support rod 22 is connected to the expansion cavity 44. As the gas enters the expansion cavity 44 through the second exhaust port 222, the expansion membrane 4 can be horizontally expanded to improve the sun protection of the host 1 and sudden sporadic rain. The expansion membrane 4 has a certain thickness so that it can be deformed after expansion.

[0027] A piston tube 23 is fixed on the inner bottom surface of the storage box 2. A hollow structure is formed inwardly from one end of the piston tube 23, and an air pipe 231 is connected from the other end of the piston tube 23 to the inside of the support rod 22. The gas can be guided to the inside of the support rod 22 through the air pipe 231. A piston 332 that can move along its length is provided in the piston tube 23. When the piston 332 moves, the pressure change inside the piston tube 23 is then transmitted to the support rod 22 through the air pipe 231. A pressure rod 33 is extended from the surface of the piston 332 to the opening of the piston tube 23, and a moving ring 331 is fixed to one side near the free end of the pressure rod 33, and an insert is provided on the inner ring wall of the moving ring 331.

[0028] One end of the reciprocating screw 32 passes through the moving ring 331, and one end of the insert extends to the path of the surface of the reciprocating screw 32. A worm 31 is extended from one end of the reciprocating screw 32 to one end of the storage box 2. The worm 31 is meshed with a worm wheel 221 fixedly connected to one side of the outer peripheral surface of the support rod 22. As the worm 31 rotates, the meshing worm wheel 221 above can be driven, and then the support rod 22 can rotate with the worm wheel 221 as the axis. The end of the worm 31 is connected to the motor 3, one end of the motor 3 extends out of the storage box 2, and the outer surface of the storage box 2 is covered with a shielding cover 211, which is connected to the outer surface of the motor 3 to prevent the electromagnetic of the motor 3 from affecting the total station. At the same time, the inside of the shielding cover 211 is filled with a vibration-damping rubber pad to reduce vibration transmission. When the total station is used for surveying and mapping, the motor 3 is running. After the motor 3 rotates, the worm 31 provided at the output end of the motor 3 can drive the worm wheel 221. As the worm wheel 221 rotates, it drives the support rod 22 to rotate with the worm wheel 221 as the axis, and then the support rod 22 can flip upward. During the flipping of the support rod 22, its reciprocating screw 32 rotates together with the worm 31, and then the reciprocating screw 32 enables the pressure rod 33 to move toward the inside of the piston tube 23. During the movement of the pressure rod 33, the piston 332 continuously squeezes the space inside the piston tube 23, and then the airflow inside the piston tube 23 can enter the support rod 22 through the air pipe 231, and then the airflow enters the expansion chamber 44 through the exhaust port 222, and then the expansion membrane 4 expands during the lifting of the support rod 22, and then the expansion membrane 4 is laid horizontally above the main unit 1, thereby having a certain sunshade effect on it. On the contrary, after the piston 332 moves in the reverse direction, the expansion membrane 4 can be contracted immediately, and can be manually wrapped around the outer peripheral surface of the support rod 22 .

[0029] like Figure 3-Figure 12 As shown, a hose 41 is fixed at the edge of the bottom surface of the expansion membrane 4, and plug ports 412 are fixed on the four sides of the outer circumference of the hose 41. The plug ports 412 are communicated with the interior of the hose 41, and an opening is formed at one end of the plug ports 412. A magnetic block 42 is fixed on the bottom surface of the expansion membrane 4, which is used to support one end of a fixed plug rod 43 to be inserted into the plug port 412 and magnetically attracted by the magnetic block 42.

[0030] A limiting column 223 is fixed on the outer circumference of the support rod 22. The limiting column 223 is arranged in a rectangular structure, and a displaceable limiting groove tube 51 is sleeved on the outer circumference of the limiting column 223. A moving rod 54 is fixed on the bottom surface of the limiting column 223, and a docking tube 5 is extended at one end of the moving rod 54 in the direction of the plug-in rod 43. At the same time, an expansion opening 431 is expanded outward at the opening at one end of the plug-in rod 43, and the docking tube 5 can be easily inserted through the expansion opening 431.

[0031] The other end of the moving rod 54 is hinged with a push rod 73, and the other end of the push rod 73 is hinged with a push rod 71, and the push rod 71 extends downward along the direction of the support rod 22, and a lifting ring 7 is fixed at the end of the push rod 71, and the lifting ring 7 is sleeved on the outer peripheral surface of the support rod 22. When the expansion membrane 4 needs to be supported, one end of the plug rod 43 can be inserted into the inside of the plug port 412, and the magnetic block 42 magnetically absorbs the outer surface of the plug rod 43. As the lifting ring 7 moves upward, the push rod 71 on the lifting ring 7 can push the push rod 73, and then one end of the push rod 73 can push the docking tube 5, so that one end of the docking tube 5 can be inserted into the inside of the expansion port 431, so that the plug rod 43 can use the docking tube 5 as a support point to support the expansion membrane 4.

[0032] The bottom surface of the outer circumference of the hose 41 is evenly provided with exhaust ports 111, and a lifting pipe 24 is provided between adjacent top rods 71, and the top end of the lifting pipe 24 is fixed to the outer circumference of the support rod 22. A moving rod 22 is fixed to the upper surface of the lifting ring 7, and one end of the moving rod 22 extends to the inside of the lifting pipe 24, and a top block 721 is fixed to the top of the moving rod 22, and an air passage 722 is provided from the outer circumference of the moving rod 22 to the outer circumference of the top block 721. The diameter of the top block 721 matches the diameter of the inside of the lifting pipe 24.

[0033] A connecting pipe 53 is connected to the bottom of the moving rod 54 on the outer circumference of the lifting tube 24, and an air inlet 52 is opened from the free end of the connecting pipe 5 to the inside of the lifting tube 24, and the opening of the air inlet 52 is connected to the air channel 722. At the same time, a connecting pipe 25 is connected to the lower part of the outer circumference of the lifting tube 24, and the other end of the connecting pipe 25 is connected to the adjacent lifting tube 24.

[0034] A motor cover 6 is fixed to the lower part of the outer circumference of the support rod 22, and a fan 62 is fixed inside the motor cover 6. At the same time, a shield cover is sleeved on the outer circumference of the fan 62, and a connecting pipe 2 61 is extended from the top opening of the motor cover 6 to the direction of the lifting pipe 24. When the host 1 is used outdoors, the fan 62 is running, and then the airflow generated by the fan 62 is blown into the inside of the lifting pipe 24 through the connecting pipe 2 61, and then the airflow inside the lifting pipe 24 pushes the top block 721. After the top block 721 moves to the top of the lifting pipe 24, the airway 722 on the outer circumference of the lifting pipe 24 is connected with the connecting pipe 1 53, and in the process of the lifting ring 7 moving upward, the push rod 71 pushes the push rod 73 to insert the butt joint pipe 5 into the inside of the plug rod 43, and then the airflow is supplied to the inside of the hose 41 through the air inlet 52 and the plug rod 43, and then blown out from the exhaust port 1 411, thereby forming an air curtain around the host 1 to prevent some fine sand and gravel from causing an impact.

[0035] like Figure 2 and Figure 13-14As shown, during the use of the total station, since the total station is placed outdoors, during some hot weather, it is impossible to cool down people and equipment. A fan slot 26 is fixed at one end of the storage box 2, and the top and bottom of the fan slot 26 are open structures, and a damper 27 is fixed at the bottom of the fan slot 26, and a fan 261 for cooling is fixed above the damper 27.

[0036] The damper 27 is cylindrical and has two openings at both ends. Two rotatable guide plates 271 are connected to the bottom opening of the damper 27. Gears 1 272 are fixed above the two guide plates 271. The connecting shaft passes through the center of the gear 1 272. The guide plates 271 rotate through the connecting shaft connected at the center of the gear 1 272. Gears 274 are meshed and connected above the two gears 1 272. A rotating shaft 273 passes through the center of the gear 2 274 and extends out of the fan slot 26. A rotating wheel 275 is fixed at the end of the rotating shaft 273. The rotating wheel 275 is made of rubber material. A friction plate 13 is fixed to one end of the outer surface of the beam 12. When the total station is used outdoors, the storage box 2 is rotated. Since the rotating wheel 275 forms a friction with the friction plate 13, the rotating wheel 275 can rotate. As the rotating wheel 275 rotates, the two gears 1 272 are driven by the gear 2 274, so that the guide plate 271 can be opened. Then, when the fan 261 is running, its airflow passes through the guide plate 271 and blows toward the operator and equipment to achieve a cooling effect.

[0037] Working principle of a total station for cadastral surveying: During the surveying process, after the motor 3 is started, the worm gear 221 is driven by the worm 31, driving the support rod 22 to flip upward. At the same time, the reciprocating screw 32 rotates, pushing the pressure rod 33 to move into the piston tube 23, and the piston 332 squeezes the airflow in the piston tube 23. The airflow enters the support rod 22 through the air pipe 231, and then enters the expansion chamber 44 through the exhaust port 222, so that the expansion membrane 4 expands and is laid flat above the host 1, playing a sunshade role; When the expansion membrane 4 needs support, one end of the plug-in rod 43 is inserted into the plug-in port 412 and fixed by the magnetic block 42. Then the fan 62 is started, and the generated airflow enters the lifting tube 24 through the connecting tube 2 61, pushing the top block 721 to rise to the top of the lifting tube 24. At this time, the air duct 722 on the outer periphery of the lifting tube 24 is connected with the connecting tube 1 53. As the lifting ring 7 rises, the push rod 71 pushes the push rod 73 to insert the docking tube 5 into the plug-in rod 43. The airflow then enters the hose 41 through the air inlet 52 and the plug-in rod 43, and is discharged from the exhaust port 1 411, forming an air curtain around the main unit 1, effectively blocking the interference of fine sand and gravel. At the same time, as the lifting ring 7 rises, its push rod 71 pushes the push rod 73, so that the push rod 73 pushes the docking tube 5 to insert into the expansion port 431, thereby using the docking tube 5 as a support point to provide a stable support for the expansion membrane 4; Finally, the storage box 2 is rotated, and the rotating wheel 275 starts to rotate due to the friction between the rotating wheel 275 and the friction plate 13. The rotating wheel 275 drives the two gears 1 272 through the gear 2 274, thereby opening the guide plate 271. When the fan 261 is running, the airflow passes through the guide plate 271 and blows toward the operator and the equipment, achieving a cooling effect.

[0038] It should be noted that the specific models and specifications of the main unit 1, motor 3 and fan 62 need to be selected and determined according to the actual specifications of the device, and the specific selection calculation method adopts the existing technology in the field, so it will not be repeated in detail.

[0039] The power supply and principles of the host 1, the motor 3 and the fan 62 are clear to those skilled in the art and will not be described in detail here.

[0040] It is to be understood that the present invention is described by some embodiments, and it is known to those skilled in the art that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. A total station for cadastral surveying, comprising a host (1), characterized in that: An expansion membrane (4) is arranged above the main unit (1), and the expansion membrane (4) is connected to a rotatable support rod (22) inside the storage box (2). One end of the support rod (22) is connected to a rotating seat (21) connected to the inner wall of the storage box (2). An expansion chamber (44) is provided inside the expansion membrane (4). Exhaust ports (222) evenly arranged on the outer peripheral surface of the support rod (22) are communicated with the expansion chamber (44). A piston tube (23) is fixed on the inner bottom surface of the storage box (2). An air pipe (231) is connected from the other end of the piston tube (23) to the inside of the support rod (22). A pressure rod (33) is arranged inward from an opening at one end of the piston tube (23) to move together with the support rod (22). A piston (332) is fixed to one end of the pressure rod (33) inside the piston tube (23).

2. The total station for cadastral surveying according to claim 1, characterized in that: A movable ring (331) is fixed to one side of the free end of the pressure rod (33), one end of the reciprocating screw rod (32) passes through the movable ring (331), a worm (31) is extended from one end of the reciprocating screw rod (32) to one end of the storage box (2), the worm (31) is meshed with a worm wheel (221) fixedly connected to one side of the outer peripheral surface of the support rod (22), a motor (3) is connected to the end of the worm (31), one end of the motor (3) extends out of the storage box (2), and a shielding cover (211) is connected to the outer surface of the storage box (2), and the shielding cover (211) is connected to the outer surface of the motor (3).

3. The total station for cadastral surveying according to claim 2, characterized in that: A hose (41) is fixed at the edge of the bottom surface of the expansion membrane (4), and plug-in ports (412) are fixed on the outer peripheral surface of the hose (41). A magnetic block (42) is fixed to the bottom surface of the expansion membrane (4), and a plug-in rod (43) for supporting and fixing is plugged into an opening at one end of the plug-in port (412).

4. The total station for cadastral surveying according to claim 3, characterized in that: The outer circumference of the support rod (22) is respectively fixed with a limiting column (223), and a limit groove tube (51) capable of displacement is sleeved on the outer circumference of the limiting column (223), a moving rod (54) is fixed on the bottom surface of the limiting column (223), and a docking tube (5) is extended from one end of the moving rod (54) in the direction of the plug-in rod (43), and an expansion opening (431) is expanded outwardly at an opening at one end of the plug-in rod (43).

5. The total station for cadastral surveying according to claim 4, characterized in that: The other end of the movable rod (54) is hingedly connected to a push rod (73), and the other end of the push rod (73) is hingedly connected to a push rod (71), and the push rod (71) extends downward along the direction of the support rod (22), and a lifting ring (7) is fixed at the end of the push rod (71), and the lifting ring (7) is sleeved on the outer peripheral surface of the support rod (22).

6. The total station for cadastral surveying according to claim 5, characterized in that: The bottom surface of the outer circumference of the hose (41) is evenly provided with exhaust ports (411), and a lifting tube (24) is provided between adjacent top rods (71), the top end of the lifting tube (24) being fixed to the outer circumference of the support rod (22).

7. The total station for cadastral surveying according to claim 6, characterized in that: A second moving rod (72) is fixed on the upper surface of the lifting ring (7), one end of which extends into the interior of the lifting tube (24), and a top block (721) is fixed on the top of the second moving rod (72), and an air passage (722) is provided from the outer circumference of the second moving rod (72) to the outer circumference of the top block (721).

8. The total station for cadastral surveying according to claim 7, characterized in that: The outer circumference of the lifting tube (24) is connected to a connecting tube (53) towards the bottom surface of the moving rod (54), and an air inlet (52) is provided from the free end of the butt-joint tube (5) towards the inside of the lifting tube (24).

9. The total station for cadastral surveying according to claim 8, characterized in that: The opening of the air inlet duct (52) is in communication with the air duct (722), and a connecting pipe (25) is connected near the lower portion of the outer peripheral surface of the lifting pipe (24), and the other end of the connecting pipe (25) is connected to and in communication with an adjacent lifting pipe (24).

10. The total station for cadastral surveying according to claim 9, characterized in that: A motor cover (6) is fixed to the lower portion of the outer circumference of the support rod (22), a fan (62) is fixed inside the motor cover (6), a shield cover is sleeved on the outer circumference of the fan (62), and a second connecting pipe (61) extends from the top opening of the motor cover (6) in the direction of the lifting pipe (24).

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