Terrain investigation device for territorial space planning and use method

Abstract

The invention relates to the field of topographic survey, in particular to a topographic survey device for territorial space planning and a using method.The topographic survey device comprises a supporting table, a plurality of supporting legs arranged in an annular array mode are hinged to the bottom end of the supporting table, a center column is fixedly connected to the center of the supporting table, and a limiting mechanism is arranged on the center column; a protection mechanism is arranged at the top end of the supporting table. According to the topographic survey device for territorial space planning, through arrangement of counterweight balls and gravity change, when the device is relatively horizontally arranged, the supporting legs can be quickly locked, a worker can conveniently and quickly level, the labor intensity of the worker during leveling is reduced, and through combined arrangement of a double-sided toothed plate and a long toothed plate, the working efficiency of the worker is improved. The long toothed plate can be quickly inserted into the double-sided toothed plate through the movable arrangement of the spring when the equipment is relatively horizontal, the adjustment is convenient, and the detection head is protected and is convenient to transfer through the arrangement of the plurality of turnover plates.

Description

Technical Field

[0001] The present invention relates to the field of topographic survey, and in particular to a topographic survey device for national land space planning and a use method thereof. Background Art

[0002] The national land space planning is a guide to spatial development and a spatial blueprint for sustainable development. It is the basic basis for all types of development, protection and construction activities. It can strengthen the guiding and constraining role of the national land space planning on various special plans. When conducting field surveys, staff are required to carry equipment over mountains and across ridges to conduct measurements, mapping, testing, and observations on geological structures, hydrological conditions, and various natural geological phenomena.

[0003] It was found that the following problems have not been well resolved: 1. During surveying and mapping, due to terrain restrictions, it is difficult for staff to level the equipment, and during surveying and mapping, multiple sampling points need to be surveyed and mapped, which requires multiple leveling, greatly affecting the staff's survey efficiency; 2. Since multiple points need to be measured, staff need to carry out transfer with the equipment, but they need to disassemble the equipment before transferring and assembling it, which makes the operation process cumbersome and inconvenient for the use of the equipment. Summary of the invention

[0004] The purpose of the present invention is to provide a topographic survey device for national space planning and a method of use, so as to solve the problems of inconvenience in leveling and inconvenience in use raised in the above-mentioned background technology. To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a topographic survey device for national space planning, comprising a support platform, the bottom end of which is hinged with a plurality of support legs arranged in a circular array, a central column fixedly connected at the center of the support platform, a limiting mechanism arranged on the central column, and a protective mechanism arranged at the top of the support platform; The limiting mechanism includes a collar, which is sleeved on the central column, and a sleeve is fixedly connected to the side wall of the collar, and the bottom end of the sleeve is fixedly connected to two relatively arranged limit plates, and a hollow cavity is opened in the inner walls of the two limit plates, and a long tooth plate is slidably connected in the inner wall of the hollow cavity, and a slot is opened at the rear end of the long tooth plate, and a convex-shaped extrusion plate is slidably connected in the inner wall of the slot, and an adjustment spring is fixedly connected to both sides of the front end of the extrusion plate, and the adjustment spring is fixedly connected to the inner wall of the slot; A moving block is slidably connected to the inner wall of the outer sleeve, and a movable plate is fixedly connected to the top of the moving block. A locking piece is arranged inside the movable plate, and a sliding sleeve is hinged at the front end of the movable plate, and the sliding sleeve is slidably connected to the supporting leg; An inner rod is threadedly connected in the inner wall of the supporting leg.

[0005] Preferably, both sides of the end of the extrusion plate have inclined surfaces formed by machining, and the side walls of the moving block are provided with inclined plates matching the inclined surfaces of the side walls of the extrusion plate.

[0006] Preferably, the locking member comprises an inner concave cavity, the inner concave cavity is provided in the inner wall of the movable plate, a through groove is provided at the center of the inner concave cavity, and a damping rod is provided below the inner groove, a support frame is provided on the outer surface of the damping rod, and the top end of the support frame is fixedly connected to the bottom end of the center column, and the support frame is slidably connected to the inner wall of the outer sleeve, and the bottom end of the damping rod is fixedly connected to a double-sided toothed plate; A weighted ball is slidably arranged in the inner wall of the inner concave cavity; The cross section of the inner concave cavity is a concave structure, and the side wall of the inner concave cavity has a small inclined surface formed by mechanical processing.

[0007] Preferably, the damping rod and the counterweight ball both have a weak magnetic force setting, and the top end of the damping rod has a pit formed by mechanical processing.

[0008] Preferably, the locking member further comprises a transverse groove, the transverse groove is provided on the central column, and the transverse groove is communicated with the inner concave cavity, a locking plate is slidably connected to the inner wall of the transverse groove, a rear end of the locking plate is connected to a trigger plate via a metal rod, and a return spring is sleeved on the outer wall of the metal rod, a baffle is horizontally connected to the side of the trigger plate, and the baffle is fixed to the inner wall of the outer sleeve; A threaded rod is threadedly connected to the outer wall of the outer sleeve, and the bottom end of the threaded rod is closely connected to the top end of the center rod.

[0009] Preferably, the protection mechanism includes a carrying plate, the bottom end of the carrying plate is fixedly connected to a spring telescopic rod, the top of the carrying plate is provided with a detection head, and a pulling plate is hinged on a side wall of one side of the carrying plate, and the other three surfaces of the carrying plate are hinged with a flip plate, a control compartment is opened in the inner wall of a plurality of the flip plates, and a winding wheel is rotatably connected to the inner wall of the control compartment through a torsion spring, and a pulling rod is fixedly connected to the top of the winding wheel, cables are fixed at both ends of the pulling rod, and the ends of the two cables are connected to movable sleeves, the two movable sleeves are slidably connected to the flip plate, and the two movable sleeves are symmetrically arranged, and a spiral rod is inserted between the two movable sleeves, a connecting plate is fixedly connected to the outer wall of the spiral rod, and the connecting plate is fixedly connected to the carrying plate; The reel wheels in the plurality of flip plates are connected by elastic cables, and the two ends of the elastic cables are respectively connected to the two side walls of the pulling plate; The top of the support platform is provided with a plurality of plug-in slots arranged in a circular array.

[0010] Preferably, the protection mechanism further comprises a hinged rod, a plurality of the hinged rods are provided, and the plurality of hinged rods are rotatably connected to the bottom ends of the plurality of flip plates and the pulling plates respectively, and the plurality of hinged rods are hinged to the plug-in plates through damping bearings; The plug-in board is plugged into the plug-in slot relative to each other.

[0011] A method for using a topographic survey device for national land space planning comprises the following steps: S1. The staff manually pulls the supporting leg. The supporting leg rotates outward. The sliding sleeve on the supporting leg pulls the movable plate. At this time, the movable plate slides on the central column through the pulling sleeve ring set on the outer cover. At this time, the pulling sleeve synchronously drives the other two supporting legs to unfold; S2. With the opening of the supporting legs, the movable plate and the outer cover are gradually unfolded, and the movable block drives the movable block at the lower end to move synchronously. Due to the inclined surface settings on the movable block and the extrusion plate, the movable block moves forward to push the extrusion plate, and the extrusion plate moves to one side to move the long tooth plate out of the hollow cavity. At the same time, when the movable plate moves forward and opens, the trigger plate on the movable plate moves away from the baffle plate, and the trigger plate drives the locking plate to reset backward through the setting of the reset spring, and the locking plate is separated from the counterweight ball, and the counterweight ball is loosened and rolls through the change of the center of gravity; S3. Since the cross section of the inner concave cavity is concave, when the worker places the device and the device is in a relatively horizontal state, the counterweight ball is no longer offset by the center of gravity, and rolls toward the center of the inner concave cavity through the inclined surface of the inner concave cavity until the counterweight ball moves to the damping rod. Since the counterweight ball and the damping rod are set with weak magnetic force, the counterweight ball will fit with the damping rod at this time, continuously squeezing the damping rod downward, and the damping rod moves downward to push the double-sided tooth plate downward; Since the long tooth plate and the extrusion plate are connected by a spring, the tooth surface in the long tooth plate is connected to the double-sided tooth plate, so that the long tooth plate is offset by the spring, so that the long tooth plate is meshed with the double-sided tooth plate, so that the outer cover and the movable plate are connected and locked at this time, and then the threaded rod is rotated to completely lock the movable plate. At this time, the staff can adjust the other support leg again and perform the same operation process. After completing the adjustment of the two support legs, the staff of the other support leg can adjust the length of the internal rod so that the support leg can contact the ground; S4. When the staff transfers the equipment, they press down the load-bearing plate, and the load-bearing plate compresses the spring telescopic rod and moves downward. At the same time, the flip plates and the pulling plates on the four sides of the load-bearing plate rotate through the downward movement of the load-bearing plate, and the flip plates and the pulling plates move forward. At this time, the plug-in plates at the bottom ends of the flip plates and the pulling plates are removed from the plug-in slots. At this time, the flip plates and the pulling plates are reset by the torsion springs. At this time, the flip plates and the pulling plates shield the detection heads to facilitate the staff to transfer the equipment without additional adjustments, which is convenient for the next quick use. S5. After the transfer is completed, the staff pulls the pulling plate, and the pulling plate rotates downward. The pulling plate pulls the elastic cable, and the elastic cable drives the winding wheels in several flip plates to rotate. The pulling rod on the winding wheel pulls the cable to drive the movable sleeves on both sides to move relative to each other, so that the movable sleeves rotate on the spiral rod. Due to the threaded connection between the movable sleeve and the spiral rod, the movable sleeve drives the flip plate to rotate, so that the flip plate and the pulling plate rotate, and the plug-in plates on the flip plate and the pulling plate are sent into the plug-in slot again for locking.

[0012] Compared with the prior art, the present invention has the following beneficial effects: In the present invention, by setting the counterweight ball and changing the gravity, when the device is set relatively horizontally, the supporting legs can be quickly locked, which is convenient for the staff to quickly level the device and reduces the labor of the staff during leveling.

[0013] In the present invention, through the combination setting of the double-sided tooth plate and the long tooth plate, when the equipment is relatively horizontal, the long tooth plate can be quickly inserted into the double-sided tooth plate through the movable setting of the spring, so that the double-sided tooth plate and the long tooth plate are locked, which is convenient for adjustment.

[0014] In the present invention, by setting up the protection mechanism, the staff can open the flip plate and the pulling plate to shield and protect the detection head, which is convenient for the staff to transfer quickly and protect the detection head from damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the general assembly of the present invention; Figure 2 It is a schematic diagram of the three-dimensional structure of the restriction mechanism in the present invention; Figure 3 The cross-sectional structure diagram of the limiting mechanism in the present invention is shown in FIG. Figure 1 ; Figure 4 The cross-sectional structure diagram of the limiting mechanism in the present invention is shown in FIG. Figure 2 ; Figure 5 It is a schematic diagram of the three-dimensional structure of the damping rod in the present invention; Figure 6 It is a schematic diagram of the cross-sectional structure of the limiting plate in the present invention; Figure 7 It is a schematic diagram of the cross-sectional structure of the jacket in the present invention; Figure 8 It is a schematic diagram of the distribution structure of the flip plate and the pulling plate in the present invention; Fig. 9 It is a three-dimensional structural diagram of the support platform in the present invention; Fig.10 It is a schematic diagram of the cross-sectional structure of the pulling plate in the present invention; Fig.11For the present invention Fig.10 The enlarged structural diagram at A in the middle; Fig.12 It is a schematic diagram of the structure of the plug board in the present invention.

[0016] In the figure: 1, support platform; 2, support leg; 3, center column; 4, limiting mechanism; 41, collar; 42, outer sleeve; 43, limit plate; 44, hollow cavity; 45, long tooth plate; 46, notch; 47, extrusion plate; 48, moving block; 49, movable plate; 410, locking piece; 4101, inner concave cavity; 4102, damping rod; 4103, support frame; 4104, double-sided tooth plate; 4105, counterweight ball; 4106, horizontal groove; 4107, Locking plate; 4108, trigger plate; 4109, baffle; 41010, threaded rod; 411, sliding sleeve; 5, protection mechanism; 51, load-bearing plate; 52, detection head; 53, pulling plate; 54, flip plate; 55, control compartment; 56, winding wheel; 57, pulling rod; 58, cable; 59, movable sleeve; 510, spiral rod; 511, connecting plate; 512, elastic cable; 513, plug-in slot; 514, hinged rod; 515, plug-in plate. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technical personnel in this field without creative work are within the scope of protection of the present invention.

[0018] See also Figures 1 to 12 The present invention provides a technical solution: a topographic survey device for national land space planning, comprising a support platform 1, a plurality of support legs 2 arranged in a circular array are hingedly connected to the bottom end of the support platform 1, a central column 3 is fixedly connected to the center of the support platform 1, a limiting mechanism 4 is arranged on the central column 3, and a protective mechanism 5 is arranged on the top of the support platform 1; The limiting mechanism 4 includes a collar 41, which is sleeved on the central column 3, and a sleeve 42 is fixedly connected to the side wall of the collar 41, and two relatively arranged limiting plates 43 are fixedly connected to the bottom end of the sleeve 42, and a hollow cavity 44 is opened in the inner wall of the two limiting plates 43, and a long tooth plate 45 is slidably connected in the inner wall of the hollow cavity 44, and a notch 46 is opened at the rear end of the long tooth plate 45, and a convex-shaped extrusion plate 47 is slidably connected in the inner wall of the notch 46, and an adjusting spring is fixedly connected to both sides of the front end of the extrusion plate 47, and the adjusting spring is fixedly connected to the inner wall of the notch 46; A moving block 48 is slidably connected to the inner wall of the outer sleeve 42, and a movable plate 49 is fixedly connected to the top of the moving block 48. A locking piece 410 is provided inside the movable plate 49, and a sliding sleeve 411 is hinged at the front end of the movable plate 49, and the sliding sleeve 411 is slidably connected to the supporting leg 2; An inner rod is threadedly connected in the inner wall of the supporting leg 2 .

[0019] In this embodiment, Figure 1 , Figure 2 and Figure 3 As shown, both sides of the end of the extrusion plate 47 have machined inclined surfaces, and the side walls of the moving block 48 are provided with inclined plates that match the inclined surfaces of the side walls of the extrusion plate 47, which can quickly release the lock of the counterweight ball 4105 and prevent the counterweight ball 4105 from triggering the device to lock when not in use.

[0020] In this embodiment, Figure 2 , Figure 3 , Figure 4 and Figure 7 As shown, the locking member 410 includes an inner concave cavity 4101, which is provided in the inner wall of the movable plate 49, and a through groove is provided at the center of the inner concave cavity 4101, and a damping rod 4102 is provided below the inner groove, a support frame 4103 is sleeved on the outer surface of the damping rod 4102, and the top end of the support frame 4103 is fixedly connected to the bottom end of the center column 3, and the support frame 4103 is slidably connected to the inner wall of the outer sleeve 42, and the bottom end of the damping rod 4102 is fixedly connected to a double-sided tooth plate 4104; A weighted ball 4105 is slidably disposed in the inner wall of the inner concave cavity 4101; The cross section of the inner cavity 4101 is a concave structure, and the side wall of the inner cavity 4101 has a small slope formed by mechanical processing. The counterweight ball 4105 controls the triggering of the limiting mechanism 4 through the change of gravity, which is convenient for the staff to quickly perform leveling.

[0021] In this embodiment, Figure 4 and Figure 5 As shown, both the damping rod 4102 and the counterweight ball 4105 have a weak magnetic force setting, and the top of the damping rod 4102 has a pit formed by mechanical processing. Through the weak magnetic force setting, when the counterweight ball 4105 and the damping rod 4102 are connected, it can be ensured that the counterweight ball 4105 triggers the damping rod 4102.

[0022] In this embodiment, Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, the locking member 410 further includes a transverse groove 4106, which is provided on the central column 3 and communicates with the inner concave cavity 4101. A locking plate 4107 is slidably connected to the inner wall of the transverse groove 4106. The rear end of the locking plate 4107 is connected to a trigger plate 4108 via a metal rod, and a return spring is sleeved on the outer wall of the metal rod. A baffle plate 4109 is horizontally connected to the side of the trigger plate 4108, and the baffle plate 4109 is fixed to the inner wall of the outer sleeve 42. A threaded rod 41010 is threadedly connected to the outer wall of the outer sleeve 42, and the bottom end of the threaded rod 41010 is fitted and connected to the top end of the center rod. Through the setting of the threaded rod 41010, the movable plate 49 can be measured and locked again through the threaded rod 41010 after the locking is completed.

[0023] In this embodiment, Figure 1 , Figure 8 , Fig. 9 , Fig.10 and Fig.11 As shown, the protection mechanism 5 includes a carrying plate 51, a spring telescopic rod is fixedly connected to the bottom end of the carrying plate 51, a detection head 52 is installed on the top of the carrying plate 51, and a pulling plate 53 is hinged on one side wall of the carrying plate 51, and the other three surfaces of the carrying plate 51 are hinged with flip plates 54, a control compartment 55 is opened in the inner wall of a plurality of flip plates 54, and a winding wheel 56 is rotatably connected to the inner wall of the control compartment 55 through a torsion spring, and a pulling rod 57 is fixedly connected to the top of the winding wheel 56, cables 58 are fixed to both ends of the pulling rod 57, and the ends of the two cables 58 are connected to movable sleeves 59, the two movable sleeves 59 are slidably connected to the flip plate 54, and the two movable sleeves 59 are symmetrically arranged, and a spiral rod 510 is inserted between the two movable sleeves 59, and a connecting plate 511 is fixedly connected to the outer wall of the spiral rod 510, and the connecting plate 511 is fixedly connected to the carrying plate 51; The reel wheels 56 in the plurality of flip plates 54 are connected by elastic cables 512, and the two ends of the elastic cables 512 are respectively connected to the two side walls of the pulling plate 53; The top of the support platform 1 is provided with a plurality of plug-in slots 513 arranged in a circular array, and a plurality of flip plates 54 are provided to shield and protect the detection head 52, making it convenient for the equipment to be transferred.

[0024] In this embodiment, Figure 1 , Fig.10 , Fig.11 and Fig.12 As shown, the protection mechanism 5 further includes a hinged rod 514, a plurality of hinged rods 514 are provided, and the plurality of hinged rods 514 are rotatably connected to the bottom ends of the plurality of flip plates 54 and the pulling plate 53, respectively, and the plurality of hinged rods 514 are hinged to the plug-in plate 515 through a damping bearing; The plug-in plate 515 is plugged into the plug-in slot 513 , and the hinge rod 514 and the plug-in plate 515 are arranged to facilitate locking of the flip plate 54 and the pulling plate 53 on the support platform 1 .

[0025] In this embodiment, Figures 1 to 12 As shown, a method for using a topographic survey device for national land space planning includes the following steps: S1, the staff manually pulls the support leg 2, and the current support leg 2 rotates outward, and the sliding sleeve 411 on the support leg 2 pulls the movable plate 49, and the movable plate 49 slides on the central column 3 through the setting of the pull ring 41 of the outer sleeve 42, and the pulling sleeve synchronously drives the other two support legs 2 to unfold; S2. With the opening of the supporting leg 2, the movable plate 49 and the outer sleeve 42 are gradually unfolded, and the movable block drives the movable block 48 at the lower end to move synchronously. Due to the inclined surface settings on the movable block 48 and the extrusion plate 47, the movable block 48 moves forward to push the extrusion plate 47, and the extrusion plate 47 moves to one side to move the long tooth plate 45 out of the hollow cavity 44. At the same time, when the movable plate 49 moves forward and opens, the trigger plate 4108 on the movable plate 49 moves away from the baffle 4109, and the trigger plate 4108 drives the locking plate 4107 to reset backward through the setting of the reset spring, and the locking plate 4107 is separated from the counterweight ball 4105, and the counterweight ball 4105 is loosened and rolls through the change of the center of gravity; S3. Since the cross section of the inner concave cavity 4101 is concave, when the worker places the device and the device is in a relatively horizontal state, the counterweight ball 4105 is no longer offset by the center of gravity, and rolls toward the center of the inner concave cavity 4101 through the inclined surface of the inner concave cavity 4101 until the counterweight ball 4105 moves to the damping rod 4102. Since the counterweight ball 4105 and the damping rod 4102 are set with weak magnetic force, the counterweight ball 4105 will fit with the damping rod 4102 at this time, continuously squeezing the damping rod 4102 to move downward, and the damping rod 4102 moves downward to push the double-sided tooth plate 4104 downward; Since the long tooth plate 45 and the extrusion plate 47 are connected by a spring, the tooth surface in the long tooth plate 45 is connected to the double-sided tooth plate 4104, so that the long tooth plate 45 is offset by the spring, so that the long tooth plate 45 and the double-sided tooth plate 4104 are meshed, so that the outer sleeve 42 and the movable plate 49 are connected and locked, and then the threaded rod 41010 is rotated to completely lock the movable plate 49. At this time, the staff can adjust the other support leg 2 again and perform the same operation process. After completing the adjustment of the two support legs 2, the staff of the other support leg 2 can adjust the length of the internal inner rod so that the support leg 2 can contact the ground; S4. Later, when the staff is transferring the equipment, the staff presses down the load-bearing plate 51, and the load-bearing plate 51 compresses the spring telescopic rod and moves downward. At the same time, the flip plates 54 and the pulling plates 53 on the four sides of the load-bearing plate 51 rotate through the downward movement of the load-bearing plate 51, and the flip plates 54 and the pulling plates 53 move forward. At this time, the plug-in plates 515 at the bottom ends of the flip plates 54 and the pulling plates 53 are removed from the plug-in slots 513. At this time, the flip plates 54 and the pulling plates 53 are reset by the torsion springs. At this time, the flip plates 54 and the pulling plates 53 cover the detection head 52 to facilitate the staff to transfer the equipment without additional adjustment, which is convenient for the next quick use. S5. After the transfer is completed, the staff pulls the pulling plate 53, and the pulling plate 53 rotates downward. The pulling plate 53 pulls the elastic cable 512, and the elastic cable 512 drives the winding wheels 56 in the flip plates 54 to rotate. The pulling rod 57 on the winding wheel 56 pulls the cable 58 to drive the movable sleeves 59 on both sides to move relative to each other, so that the movable sleeve 59 rotates on the spiral rod 510. Due to the threaded connection between the movable sleeve 59 and the spiral rod 510, the movable sleeve 59 drives the flip plate 54 to rotate, so that the flip plate 54 and the pulling plate 53 rotate, and the plug-in plate 515 on the flip plate 54 and the pulling plate 53 is sent into the plug-in slot 513 again for locking.

[0026] The above shows and describes the basic principles, main features and advantages of the present invention. Technical personnel in this industry should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A topographic survey device for national land space planning, comprising a support platform (1), characterized in that: The bottom end of the support platform (1) is hingedly connected to a plurality of support legs (2) arranged in a circular array, a central column (3) is fixedly connected to the center of the support platform (1), a limiting mechanism (4) is arranged on the central column (3), and a protective mechanism (5) is arranged on the top end of the support platform (1); The limiting mechanism (4) comprises a collar (41), the collar (41) being sleeved on the central column (3), and a sleeve (42) being fixedly connected to the side wall of the collar (41), and two limiting plates (43) being fixedly connected to the bottom end of the sleeve (42) being arranged opposite to each other, and a hollow cavity (44) being provided in the inner walls of the two limiting plates (43), and a long tooth plate (45) being slidably connected to the inner wall of the hollow cavity (44), and a notch (46) being provided at the rear end of the long tooth plate (45), and a convex-shaped extrusion plate (47) being slidably connected to the inner wall of the notch (46), and an adjustment spring being fixedly connected to both sides of the front end of the extrusion plate (47), and the adjustment spring being fixedly connected to the inner wall of the notch (46); A moving block (48) is slidably connected to the inner wall of the outer sleeve (42), and a movable plate (49) is fixedly connected to the top of the moving block (48), a locking piece (410) is provided inside the movable plate (49), and a sliding sleeve (411) is hingedly connected to the front end of the movable plate (49), and the sliding sleeve (411) is slidably connected to the support leg (2); An inner rod is threadedly connected in the inner wall of the support leg (2).

2. A topographic survey device for national land space planning according to claim 1, characterized in that: Both sides of the end of the extrusion plate (47) have inclined surfaces formed by machining, and the side wall of the moving block (48) is provided with an inclined plate matching the inclined surface of the side wall of the extrusion plate (47).

3. A topographic survey device for national land space planning according to claim 2, characterized in that: The locking member (410) comprises an inner concave cavity (4101), the inner concave cavity (4101) is provided in the inner wall of the movable plate (49), a through groove is provided at the center of the inner concave cavity (4101), and a damping rod (4102) is provided below the inner groove, a support frame (4103) is sleeved on the outer surface of the damping rod (4102), and the top end of the support frame (4103) is fixedly connected to the bottom end of the central column (3), and the support frame (4103) is slidably connected to the inner wall of the outer sleeve (42), and the bottom end of the damping rod (4102) is fixedly connected to a double-sided toothed plate (4104); A weighted ball (4105) is slidably disposed in the inner wall of the inner concave cavity (4101); The cross section of the inner concave cavity (4101) is a concave structure, and the side wall of the inner concave cavity (4101) has a small inclined surface formed by mechanical processing.

4. A topographic survey device for national land space planning according to claim 3, characterized in that: The damping rod (4102) and the weighted ball (4105) both have a weak magnetic force setting, and the top end of the damping rod (4102) has a recess formed by mechanical processing.

5. A topographic survey device for national land space planning according to claim 4, characterized in that: The locking member (410) further comprises a transverse groove (4106), wherein the transverse groove (4106) is formed on the central column (3) and is in communication with the inner concave cavity (4101); a locking plate (4107) is slidably connected to the inner wall of the transverse groove (4106); a rear end of the locking plate (4107) is connected to a trigger plate (4108) via a metal rod, and a return spring is sleeved on the outer wall of the metal rod; a baffle plate (4109) is horizontally connected to the side of the trigger plate (4108), and the baffle plate (4109) is fixed to the inner wall of the outer sleeve (42); A threaded rod (41010) is threadedly connected to the outer wall of the outer sleeve (42), and the bottom end of the threaded rod (41010) is snugly connected to the top end of the center rod.

6. A topographic survey device for national land space planning according to claim 5, characterized in that: The protection mechanism (5) comprises a bearing plate (51), the bottom end of the bearing plate (51) is fixedly connected to a spring telescopic rod, the top end of the bearing plate (51) is provided with a detection head (52), a pulling plate (53) is hingedly connected to a side wall of one side of the bearing plate (51), and the other three surfaces of the bearing plate (51) are hingedly connected to flip plates (54), a control chamber (55) is provided in the inner wall of a plurality of the flip plates (54), and a winding wheel (56) is rotatably connected to the inner wall of the control chamber (55) via a torsion spring, and the winding wheel (56) is hingedly connected to the inner wall of the control chamber (55). 6) is fixedly connected to the top of a pulling rod (57), cables (58) are fixed to both ends of the pulling rod (57), and the ends of the two cables (58) are connected to movable sleeves (59), the two movable sleeves (59) are slidably connected to the flip plate (54), and the two movable sleeves (59) are symmetrically arranged, and a spiral rod (510) is inserted between the two movable sleeves (59), and a connecting plate (511) is fixedly connected to the outer wall of the spiral rod (510), and the connecting plate (511) is fixedly connected to the bearing plate (51); The reeling wheels (56) in the plurality of flip plates (54) are connected to each other via an elastic cable (512), and the two ends of the elastic cable (512) are respectively connected to the two side walls of the pulling plate (53); The top of the support platform (1) is provided with a plurality of plug-in slots (513) arranged in a circular array.

7. A topographic survey device for national land space planning according to claim 6, characterized in that: The protection mechanism (5) further comprises a hinged rod (514), wherein a plurality of the hinged rods (514) are provided, and the plurality of hinged rods (514) are rotatably connected to the bottom ends of the plurality of flip plates (54) and the pulling plate (53), respectively, and the plurality of hinged rods (514) are hingedly connected to the plug-in plate (515) via a damping bearing; The plug-in board (515) is plugged into the plug-in slot (513) relative to each other.

8. The method for using the topographic survey device for national land space planning according to claim 7, characterized in that: The steps include: S1, the staff manually pulls the supporting leg (2), and the supporting leg (2) rotates outward, and the sliding sleeve (411) on the supporting leg (2) pulls the movable plate (49), and the movable plate (49) slides on the central column (3) through the pulling sleeve ring (41) set on the outer sleeve (42), and the pulling sleeve synchronously drives the other two supporting legs (2) to unfold; S2. With the opening of the supporting leg (2), the movable plate (49) and the outer sleeve (42) are gradually unfolded, and the movable block drives the movable block (48) at the lower end to move synchronously. Due to the inclined surfaces on the movable block (48) and the extrusion plate (47), the movable block (48) moves forward to push the extrusion plate (47), and the extrusion plate (47) moves to one side to move the long tooth plate (45) out of the hollow cavity (44). At the same time, when the movable plate (49) moves forward to open, the trigger plate (4108) on the movable plate (49) moves away from the baffle plate (4109), and the trigger plate (4108) drives the locking plate (4107) to reset backward through the setting of the reset spring, and the locking plate (4107) is separated from the counterweight ball (4105), and the counterweight ball (4105) is loosened and rolls due to the change of the center of gravity; S3. Since the cross section of the inner concave cavity (4101) is concave, when the worker places the device and the device is in a relatively horizontal state, the counterweight ball (4105) is no longer offset by the center of gravity, but rolls toward the center of the inner concave cavity (4101) through the inclined surface of the inner concave cavity (4101) until the counterweight ball (4105) moves to the damping rod (4102). Since the counterweight ball (4105) and the damping rod (4102) are configured with a weak magnetic force, the counterweight ball (4105) will fit with the damping rod (4102) at this time, continuously squeezing the damping rod (4102) to move downward, and the damping rod (4102) moves downward to push the double-sided toothed plate (4104) downward; Since the long tooth plate (45) and the extrusion plate (47) are connected by a spring, the tooth surface in the long tooth plate (45) is connected to the double-sided tooth plate (4104), so that the long tooth plate (45) is offset by the spring, so that the long tooth plate (45) and the double-sided tooth plate (4104) are meshed, so that the outer sleeve (42) and the movable plate (49) are connected and locked, and then the threaded rod (41010) is rotated to completely lock the movable plate (49). At this time, the staff can adjust the other support leg (2) again and perform the same operation process. After completing the adjustment of the two support legs (2), the staff of the other support leg (2) can adjust the length of the inner rod so that the support leg (2) can contact the ground; S4. When the staff member subsequently transfers the equipment, the staff member presses down the load-bearing plate (51), and the load-bearing plate (51) compresses the spring telescopic rod and moves downward. At the same time, the flip plates (54) and the pulling plates (53) on the four sides of the load-bearing plate (51) rotate due to the downward movement of the load-bearing plate (51), and the flip plates (54) and the pulling plates (53) move forward. At this time, the plug-in plates (515) at the bottom ends of the flip plates (54) and the pulling plates (53) are removed from the plug-in slots (513). At this time, the flip plates (54) and the pulling plates (53) are reset by the torsion spring. At this time, the flip plates (54) and the pulling plates (53) shield the detection head (52), so as to facilitate the staff member to transfer the equipment without additional adjustment, and facilitate the next quick use. S5. After the transfer is completed, the staff pulls the pulling plate (53), and the pulling plate (53) rotates downward. The pulling plate (53) pulls the elastic cable (512), and the elastic cable (512) drives the winding wheels (56) in the plurality of flip plates (54) to rotate. The pulling rod (57) on the winding wheel (56) pulls the cable (58) to drive the movable sleeves (59) on both sides to move relative to each other, so that the movable sleeve (59) rotates on the spiral rod (510). Due to the threaded connection between the movable sleeve (59) and the spiral rod (510), the movable sleeve (59) drives the flip plate (54) to rotate, so that the flip plate (54) and the pulling plate (53) rotate, and the plug-in plate (515) on the flip plate (54) and the pulling plate (53) is sent into the plug-in slot (513) again for locking.

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