An engineering surveying device for national land space planning

Abstract

The present invention belongs to the field of engineering surveying, and specifically relates to an engineering surveying device for national space planning, including a tripod and a surveying instrument, etc.; the surveying instrument is installed on the tripod; the tripod is composed of a sliding rod, a pedal, a fixed rod and a locker; each leg of the tripod is slidably connected with a sliding rod. By rotating the fixed rod, the fixed rod rotates to drive the fixed frame to rotate, and then the fixed rod rotates and combines with the sliding rod to form a T-shaped shape, and the lower surface of the fixed rod contacts the ground, so that the fixed rod is supported by the three fixed rods. When the fixed rod contacts the ground with relatively soft soil, the depth of the fixed rod inserted into the ground is shallower, so that the fixed rod is easy to move, and by making the three fixed rods contact the ground, the stability of the tripod can be improved, so that the surveying instrument can remain stable during the surveying process. At the same time, the friction is enhanced by a retractable latch plate to prevent the fixed rod from slipping on the mud.

Description

Technical Field

[0001] The present invention belongs to the field of engineering surveying, and in particular relates to an engineering surveying device for national land space planning. Background Art

[0002] Based on the prior art, it is found that, during the horizontal positioning process of the existing engineering surveying instrument, the laser point on the surveying instrument needs to be aligned with the center point of the ground mark. However, during the alignment process, the position of the tripod needs to be constantly adjusted, so that the tripod needs to be moved back and forth. When the tripod is placed directly above the ground mark, the lower end of the tripod will contact the ground. When the tripod is built on a relatively soft ground, the lower end of the tripod is easily inserted into the soil. As a result, during the adjustment of the tripod, the lower end of the tripod needs to be pulled out of the ground and then the tripod is moved. This makes the alignment of the laser point on the surveying instrument and the center point of the ground mark cumbersome and the positioning efficiency low.

[0003] Also, when the surveying instrument is used in high-rise buildings, the tripod will be installed on the poured floor slab, so that the tripod and the surveying instrument are at a high position, which makes it easy for the tripod and the surveying instrument to be affected by wind, causing the tripod and the surveying instrument to move, ultimately causing deviations in the surveying data and affecting the accuracy. Summary of the invention

[0004] In order to overcome the shortcomings that the tripod needs to move back and forth and the positioning work is cumbersome during the alignment of the laser point on the surveying instrument with the center point of the ground mark, the present invention provides an engineering measurement device for national land space planning.

[0005] The technical scheme is as follows: an engineering surveying device for land space planning, including a tripod and a surveying instrument; the surveying instrument is installed on the tripod; the tripod is composed of a sliding rod, a pedal, a fixed rod and a locker; each leg of the tripod is slidably connected to a sliding rod; each sliding rod is fixedly connected to a pedal; the lower end of each sliding rod is connected to a fixed rod, and the lower end of the fixed rod is set in a cone shape; each leg of the tripod is fixedly connected to a locker; each locker is in contact with a sliding rod; it also includes a fixed block, a fixed frame, a limit rod, a cylinder, a scraper ring, a mounting block, a connecting block, a sliding rod and an elastic member I; each sliding rod of the tripod is connected to a fixed rod; each locking device ... A fixed block is fixed on the rod; a fixed frame is rotatably connected to each fixed block; the fixed frame is fixed to the fixed rod; a limit rod is fixed to the sliding rod, and a sliding groove is provided on the limit rod; a mounting block is slidably connected to each limit rod; a cylinder is fixed to each mounting block, and the cylinder is connected to the fixed rod and the sliding rod in a damping sliding manner; a scraper ring is fixed to each cylinder; a connecting block is fixed to each cylinder; a sliding rod is fixed to each mounting block, and the sliding rod is in contact with the limit rod; an elastic member I is sleeved on the outside of each sliding rod, one end of the elastic member I is fixed to the mounting block, and the other end of the elastic member I is fixed to the sliding rod.

[0006] More preferably, a ball head is provided at one end of the slide rod close to the limiting rod for limiting and reducing the friction between the slide rod and the limiting rod.

[0007] More preferably, it further comprises a limit bar and a fixing pin; each leg of the tripod is rotatably connected to a limit bar; each leg of the tripod is fixedly connected to a fixing pin.

[0008] More preferably, the scraper ring is configured to be in a cone shape that is smaller at the top and larger at the bottom.

[0009] More preferably, it also includes a latch plate, a guide rod and an elastic member III, a smooth protrusion is provided at the lower part of the fixed block, and each fixed rod is provided with a plurality of guide rods; the plurality of guide rods are slidably connected with the latch plate, and the latch of the latch plate passes through the fixed rod; an elastic member III is sleeved on the outside of each guide rod, one end of the elastic member III contacts the latch plate, and the other end of the elastic member III contacts the fixed rod.

[0010] More preferably, the latch plate is spaced 5-10 cm apart from the tip of the fixing rod.

[0011] More preferably, a protection system is also included; the protection system is connected to the surveying and mapping instrument housing; the protection system includes a fixed plate, an elastic member II, a protrusion, a support frame, a top plate, a baffle, a blackout curtain and a fixed strip; at least two fixed plates are fixedly connected to the surveying and mapping instrument housing; each fixed plate is fixedly connected to an elastic member II; each elastic member II is fixedly connected to at least two protrusions; all protrusions on the same elastic member II are slidably connected to the corresponding fixed plate; each fixed plate has a detachable top plate; each top plate is fixedly connected to a support frame; each support frame is fixedly connected to a baffle; each support frame is provided with a slide groove, and a blackout curtain is commonly fixedly connected to the slide groove, and the blackout curtain is provided with at least two observation ports; a fixing strip is fixedly connected to the movable end of the blackout curtain.

[0012] More preferably, it further includes a magnetic strip; a magnet is arranged in the fixing strip; and all the supporting frames are fixedly connected to a magnetic strip.

[0013] More preferably, a shielding plate is further included; a shielding plate is fixedly connected to the outer side of each support frame.

[0014] More preferably, the mask plate is configured to be in a cone shape.

[0015] Beneficial effects are: The advantages and positive effects of the present invention are:

[0016] (1) By rotating the fixed rod, the fixed rod drives the fixed frame to rotate, and then the fixed rod rotates and combines with the sliding rod to form a T-shaped shape, and the lower surface of the fixed rod contacts the ground. Therefore, through the support of the three fixed rods, when the fixed rod contacts the ground with relatively soft soil, the depth of the fixed rod inserted into the ground is shallower, which facilitates the movement of the fixed rod. Then, the tripod is moved so that the laser point of the surveying instrument is aligned with the center of the ground mark, thereby improving the positioning efficiency and surveying efficiency. By making the three fixed rods contact the ground, the stability of the tripod can be improved, so that the surveying instrument can remain stable during the surveying process; at the same time, the friction is enhanced by the retractable latch plate to prevent the fixed rod from slipping on the muddy ground.

[0017] (2) The cylinder and the scraper ring move downward along the outer side of the fixed rod to scrape off the dirt and other impurities adhering to the outer side of the fixed rod. Since the inner side is arranged in an inclined shape with a small top and a large bottom, and the scraper ring is arranged in a conical shape with a small top and a large bottom, dirt and other impurities can enter the inner side of the cylinder and the scraper ring, thereby preventing dirt and other impurities from adhering to people's hands. When the cylinder and the scraper ring move to the lower end of the fixed rod, since the lower end of the fixed rod is arranged in a conical shape, the space between the cylinder and the scraper ring and the fixed rod is increased. The cylinder and the scraper ring are then cleaned manually for the next use, and then the cylinder and the scraper ring are moved upward to reset, thereby cleaning the outer side of the fixed rod. When not in use, the cylinder and the scraper ring are moved upward to the connection between the fixed block and the fixed frame, and protected by the cylinder.

[0018] (3) The shielding curtain and two baffles work together to protect the surveying instrument, reduce the dust adhering to the lens and control panel of the surveying instrument, and the shielding curtain and two baffles can block and buffer the flying gravel, reducing the possibility of damage to the surveying instrument caused by the flying gravel. In addition, the two observation ports set on the shielding curtain allow people to view the surveying instrument in real time when using it, thereby improving the convenience of use.

[0019] (4) The wind is guided by two shield plates, and the shield plates are in a cone shape, which can reduce the problem of airflow being disturbed by the shield plates when flowing through the shield plates, causing instability of the surveying instrument. The two shields can further absorb and buffer the impact force generated by flying gravel and gravel entrained in the air, thereby reducing the adverse effects of wind and gravel on the surveying instrument. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the engineering surveying device for national land space planning of the present invention;

[0021] Figure 2 It is a schematic diagram of the three-dimensional structure of the tripod, sliding rod, pedal, fixing rod, locker, surveying instrument, lens, limit strip and fixing pin combination of the engineering surveying device for land space planning of the present invention;

[0022] Figure 3 A schematic diagram of the support structure of the engineering surveying device for land space planning of the present invention;

[0023] Figure 4 It is a combined cross-sectional view of a cylinder, a scraper ring, a mounting block and a connecting block of an engineering surveying device for land space planning of the present invention;

[0024] Figure 5 It is a schematic diagram of the rotation state of the fixed rod of the engineering surveying device for land space planning of the present invention;

[0025] Figure 6 It is a cross-sectional view of the internal structure of the fixed rod of the engineering surveying device for land space planning of the present invention in the initial state;

[0026] Figure 7 It is a cross-sectional view of the internal structure of the engineering surveying device for land space planning of the present invention when the fixed rod is in a rotating state;

[0027] Figure 8 It is a schematic diagram of the three-dimensional structure of the protection system of the engineering surveying device for land space planning of the present invention;

[0028] Fig. 9It is a schematic diagram of the three-dimensional structure of the fixed plate, support frame, baffle, shielding curtain, fixed strip and magnetic strip combined in the engineering surveying device for land space planning of the present invention;

[0029] Fig.10 It is a schematic diagram of the three-dimensional structure of the fixed plate, elastic member II, protrusion, support frame and top plate combination of the engineering surveying device for land space planning of the present invention.

[0030] Among them, the above-mentioned drawings include the following drawing marks: 1-tripstick, 11-sliding rod, 12-pedal, 13-fixed rod, 14-lock, 2-surveying instrument, 21-lens, 201-fixed block, 202-fixed frame, 203-limiting rod, 204-cylinder, 205-scraper ring, 206-mounting block, 207-connecting block, 208-sliding rod, 209-elastic part I, 210-limiting strip, 211-fixing pin, 301-latch plate, 302-guide rod, 303-elastic part III, 401-fixed plate, 4011-elastic part II, 4012-bump, 402-support frame, 4021-top plate, 403-baffle, 404-shielding curtain, 405-fixed strip, 406-magnetic strip, 407-mask plate. DETAILED DESCRIPTION

[0031] 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 technicians in this field without creative work are within the scope of protection of the present invention. Example 1

[0032] An engineering surveying device for national land space planning, according to Figure 1-Figure 7 As shown, it includes a tripod 1 and a surveying instrument 2; the surveying instrument 2 is installed on the tripod 1; the tripod 1 is composed of a sliding rod 11, a pedal 12, a fixing rod 13 and a locker 14; each leg of the tripod 1 is slidably connected to a sliding rod 11; each sliding rod 11 is fixedly connected to a pedal 12; the lower end of each sliding rod 11 is connected to a fixing rod 13, and the lower end of the fixing rod 13 is set in a cone shape; each leg of the tripod 1 is fixedly connected to a locking device 14; each locking device 14 is in contact with a sliding rod 11;

[0033] The tripod 1 also includes a fixed block 201, a fixed frame 202, a limiting rod 203, a cylinder 204, a scraper ring 205, a mounting block 206, a connecting block 207, a sliding rod 208 and an elastic member I 209; each sliding rod 11 of the tripod 1 is fixedly connected to a fixed block 201; each fixed block 201 is rotatably connected to a fixed frame 202; the fixed frame 202 is fixed to the fixed rod 13; each sliding rod 11 is fixedly connected to a limiting rod 203, and a sliding groove is opened on the limiting rod 203; each limiting rod 203 is slidably connected to a mounting block 206; each mounting block 20 6, each of which is fixedly connected with a cylinder 204, which is connected to the fixed rod 13 and the sliding rod 11 in a damping sliding manner; a scraper ring 205 is fixedly connected to the lower part of the outer ring surface of each cylinder 204; each of which is fixedly connected with a connecting block 207; each of which is fixedly connected with a sliding rod 208 on the mounting block 206, and the sliding rod 208 is in contact with the limiting rod 203; each of which is sleeved with an elastic member I 209 on the outside, which is a spring, one end of which is fixedly connected to the mounting block 206, and the other end of which is fixedly connected to the sliding rod 208.

[0034] A ball head is provided at one end of the slide rod 208 close to the limiting rod 203 for limiting and reducing the friction between the slide rod 208 and the limiting rod 203 .

[0035] It also includes a limit bar 210 and a fixing pin 211 ; each leg of the tripod 1 is rotatably connected to a limit bar 210 ; each leg of the tripod 1 is fixedly connected to a fixing pin 211 .

[0036] The scraper ring 205 is configured to be in a cone shape with a small top and a large bottom, and is used to block and guide the soil outside the fixing rod 13 .

[0037] When surveying and mapping: a ground mark is drawn manually in advance in the area to be measured, and then a tripod 1 is built just above the ground mark, and a surveying instrument 2 is installed on the tripod 1. The initial state of the three fixed rods 13 is limited by the corresponding cylinders 204. When it is needed, the laser point on the surveying instrument 2 is controlled to open, and the three lockers 14 are unlocked in sequence, and then the three sliding rods 11 are pulled in sequence. The three sliding rods 11 move, each driving a fixed block 201 to move, and the three fixed blocks 201 move, each driving a fixed frame 20 2 moves, the three fixing frames 202 move, each driving a fixing rod 13 to move, and then the three fixing rods 13 move to the ground, and at the same time the three sliding rods 11 move, each driving a limiting rod 203 to move, and the limiting rod 203 drives all the connected parts to move, so that the tripod 1 is opened, and the tripod 1 provides support for the surveying instrument 2, and then the three limiting bars 210 are manually pulled in turn and fixed, so that the three legs of the tripod 1 are locked by the three limiting bars 210, so that the three legs of the tripod 1 remain stable.

[0038] When it is necessary to use it on a soft ground, hold the connecting block 207 and pull the connecting block 207 upward, so that the connecting block 207 drives the cylinder 204 to move, so that the cylinder 204 moves upward and no longer contacts the fixing rod 13, thereby releasing the limit on the fixing rod 13, and then the fixing rod 13 is moved to rotate the fixing rod 13, and the rotation of the fixing rod 13 drives the fixing frame 202 to rotate, so that the fixing rod 13 rotates and combines with the sliding rod 11 to form a T-shaped shape, and the lower surface of the fixing rod 13 contacts the ground, as shown in FIG. Figure 5 As shown, the supporting effect of the three fixing rods 13 ensures that when the fixing rods 13 are in contact with the ground with relatively soft soil, the fixing rods 13 will not be inserted into the ground, thereby preventing the fixing rods 13 from sinking into the figure, and by making the three fixing rods 13 contact with the ground, the stability of the tripod 1 can be improved, so that the surveying instrument 2 can remain stable during the surveying process. It should be noted that at this time, the cylinder 204 is located on the sliding rod 11 and will not contact the ground.

[0039] When the surveying work is completed, the fixing rod 13 needs to be retracted. At this time, the three fixing rods 13 are rotated in sequence in the same way as above, so that the three fixing rods 13 are reset. Since the fixing block 201 and the fixing frame 202 at the connection between the fixing rod 13 and the sliding rod 11 are exposed to the outside, after contacting the ground, the outer side of the fixing rod 13 is very easy to adhere to impurities such as mud. If it is not cleaned in time, it is easy to cause damage to the fixing block 201 and the fixing frame 202.

[0040] Therefore, by manually holding the connecting block 207 and pulling the connecting block 207 to move downward, the connecting block 207 drives the cylinder 204, the scraper ring 205, the mounting block 206, the slide bar 208 and the elastic member I 209 to move downward synchronously. When the slide bar 208 moves to the lowest point of the slide groove on the limiting rod 203, the connecting block 207 is continuously driven downward by the human hand, so that the slide bar 208 is squeezed by the limiting rod 203, and then the elastic member I 209 is stretched, so that the slide bar 208 is separated from the limiting rod 203, so that the cylinder 204 and the scraper ring 205 can continue to move downward, so that the cylinder 204 and the scraper ring 205 move downward along the outer side of the fixed rod 13, thereby passing through the cylinder 204 and the scraper ring 205. The dirt and other impurities adhered to the outside of the fixed rod 13 are scraped off, and since the inner side is set to an inclined shape with a small top and a large bottom, the scraper ring 205 is set to a cone shape with a small top and a large bottom, so that dirt and other impurities can enter the inner side of the scraper ring 205, and dirt and other impurities are prevented from adhering to people's hands. Until the cylinder 204 and the scraper ring 205 move to the lower end of the fixed rod 13, since the lower end of the fixed rod 13 is set to a cone shape, the space between the cylinder 204 and the scraper ring 205 and the fixed rod 13 is increased, and then the cylinder 204 and the scraper ring 205 are manually cleaned for the next use, and then the cylinder 204 and the scraper ring 205 are moved upward to the connection between the fixed block 201 and the fixed frame 202, and are protected by the cylinder 204. Example 2

[0041] On the basis of Example 1, Figure 3-Figure 7 As shown, it also includes a latch plate 301, a guide rod 302 and an elastic member III 303. A smooth protrusion is provided at the lower part of the fixed block 201. Each fixed rod 13 is provided with a plurality of guide rods 302; the plurality of guide rods 302 are slidably connected with the latch plate 301, and the latch of the latch plate 301 passes through the fixed rod 13; an elastic member III 303 is sleeved on the outside of each guide rod 302, one end of the elastic member III 303 contacts the latch plate 301, and the other end of the elastic member III 303 contacts the fixed rod 13.

[0042] The latch plate 301 is kept at a distance of 5-10 cm from the tip of the fixing rod 13, so that the operator can rotate the fixing rod 13 by holding the distance, thereby preventing the latch plate 301 from being ejected when the fixing rod 13 is rotated, causing injury to the operator's hand. At the same time, the force required to rotate the fixing rod 13 can be saved through the lever principle.

[0043] When the lower surface of the fixed rod 13 contacts the ground, the fixed rod 13 is easy to slip on the muddy ground due to its smooth outer surface. Therefore, a latch plate 301, a guide rod 302 and an elastic member III 303 are provided in all fixed rods 13. When the operator rotates the fixed rod 13 by holding the spacing, the fixed block 201 and the fixed frame 202 rotate relative to each other, and the protrusion at the lower part of the fixed block 201 squeezes the latch plate 301, so that the latch plate 301 extends from the lower surface of the fixed rod 13, and then penetrates into the mud through the latch plate 301 to enhance the friction force. When the fixed rod 13 is reset, the latch plate 301 is retracted into the fixed rod 13 under the elastic force of the elastic member III 303, so that the fixed rod 13 is easy to store and transport. During the retraction process, the mud remaining on the surface of the latch plate 301 is scraped off by the fixed rod 13, and then remains on the surface of the fixed rod 13, and is subsequently scraped off by the cylinder 204 and the scraper ring 205. Example 3

[0044] Based on Example 2, Figure 8-Figure 10 As shown, a protection system is also included; the protection system is connected to the housing of the surveying instrument 2; the protection system includes a fixing plate 401, an elastic member II 4011, a convex block 4012, a support frame 402, a top plate 4021, a baffle 403, a shielding curtain 404 and a fixing strip 405; two fixing plates 401 are fixedly connected to the housing of the surveying instrument 2; each fixing plate 401 is fixedly connected to an elastic member II 4011, and the elastic member II 4011 is a spring; each elastic member II 4011 is fixedly connected to two convex blocks 4012 ; All the protrusions 4012 on the same elastic member II 4011 are slidably connected to the corresponding fixed plate 401; each fixed plate 401 has a detachable top plate 4021; each top plate 4021 is fixedly connected to a support frame 402; each support frame 402 is fixedly connected to a baffle 403; each support frame 402 is provided with a slide groove, and a shielding curtain 404 is fixedly connected in the slide groove, and the shielding curtain 404 has two observation ports; the movable end of the shielding curtain 404 is fixedly connected to a fixing strip 405.

[0045] It also includes a magnetic strip 406; a magnet is disposed in the fixing strip 405; and all the supporting frames 402 are fixedly connected to a magnetic strip 406.

[0046] A shielding plate 407 is also included; a shielding plate 407 is fixedly connected to the outer side of each support frame 402 .

[0047] The shield plate 407 is set to be conical in shape to guide the gas and absorb and buffer the impact force generated by flying gravel and the like.

[0048] Due to the cross-operation of various construction machinery and engineering vehicles, the construction machinery and engineering vehicles will generate a lot of dust during the operation, which will easily cause the dust to adhere to the lens 21 of the surveying instrument 2 and the control panel of the surveying instrument 2. Over time, the lens 21 and the control panel of the surveying instrument 2 will become blurred, affecting the use. In addition, during the operation of the construction machinery and engineering vehicles, gravel is likely to be generated and cause gravel splashing. When the surveying instrument 2 is close to the construction site for surveying, the splashing of gravel is likely to cause irreversible damage to the surveying instrument 2, resulting in economic losses. To solve the above problems, the initial position of the shielding curtain 404 is folded. After the installation and commissioning of the tripod 1 and the surveying instrument 2 are completed, the top plates 4021 on the two support frames 402 are respectively inserted into the corresponding fixed plates 401, and the corresponding protrusions 4012 are moved by the elastic force of the elastic member II 4011. The top plate 4021 is moved into the circular hole of the top plate 4021, so that the top plate 4021 is limited by the protrusion 4012, and then the fixing bar 405 is manually pulled to move, and the fixing bar 405 drives the movable end of the shielding curtain 404 to move, and the fixing bar 405 moves to contact the magnetic strip 406, so that the magnets provided in the fixing bar 405 and the magnetic strip 406 are attracted to each other and stick to each other, so that the shielding curtain 404 and the two baffles 403 cooperate to protect the surveying instrument 2, reduce dust adhesion on the lens 21 of the surveying instrument 2 and the control panel of the surveying instrument 2, and the shielding curtain 404 and the two baffles 403 can block and buffer the flying gravel, reduce the possibility of damage to the surveying instrument 2 caused by the flying gravel, and through the two observation ports provided on the shielding curtain 404, it is convenient for humans to view the surveying instrument 2 in real time when using the surveying instrument 2, thereby improving the convenience of use.

[0049] When the tripod 1 and the surveying instrument 2 are used in a high-rise building, the tripod 1 and the surveying instrument 2 are easily affected by wind and displaced. The wind is guided by two shield plates 407, and the shield plates 407 are in a cone shape, which can reduce the problem of the airflow being disturbed by the shield plates 407 when flowing through the shield plates 407, resulting in instability of the surveying instrument 2. In addition, the two shields can further absorb and buffer the impact force generated by flying gravel and gravel entrained in the air, thereby reducing the adverse effects of wind and gravel on the surveying instrument 2.

[0050] Those skilled in the art should understand that the above embodiments do not limit the present invention in any form, and any technical solutions obtained by equivalent replacement or equivalent transformation shall fall within the protection scope of the present invention.

Claims

1. An engineering surveying device for national land space planning, characterized in that it includes A tripod (1) and a surveying instrument (2); the tripod (1) is mounted with the surveying instrument (2); the tripod (1) is composed of a sliding rod (11), a pedal (12), a fixing rod (13) and a lock (14); each leg of the tripod (1) is slidably connected to a sliding rod (11); each sliding rod (11) is fixedly connected to a pedal (12); the lower end of each sliding rod (11) is connected to a fixing rod (13), and the lower end of the fixing rod (13) is arranged in a cone shape; Each leg of the tripod (1) is fixedly connected to a locker (14); each locker (14) is in contact with a sliding rod (11); and the tripod (1) further comprises a fixing block (201), a fixing frame (202), a limiting rod (203), a cylinder (204), a scraper ring (205), a mounting block (206), a connecting block (207), a sliding rod (208) and an elastic member I (209); each sliding rod (11) of the tripod (1) is fixedly connected to a fixing block (201); each fixing The fixed block (201) is rotatably connected to a fixed frame (202); the fixed frame (202) is fixedly connected to the fixed rod (13); a limit rod (203) is fixedly connected to the sliding rod (11), and a sliding groove is formed on the limit rod (203); each limit rod (203) is slidably connected to a mounting block (206); each mounting block (206) is fixedly connected to a cylinder (204), and the cylinder (204) is connected to the fixed rod (13) and the sliding rod (11) in a damping sliding manner; each A scraper ring (205) is fixedly connected to each cylinder (204); a connecting block (207) is fixedly connected to each cylinder (204); a sliding rod (208) is fixedly connected to each mounting block (206), and the sliding rod (208) is in contact with the limiting rod (203); an elastic member I (209) is sleeved on the outer side of each sliding rod (208), one end of the elastic member I (209) is fixedly connected to the mounting block (206), and the other end of the elastic member I (209) is fixedly connected to the sliding rod (208); It also includes a latch plate (301), a guide rod (302) and an elastic member III (303); a smooth protrusion is provided at the lower part of the fixed block (201); a plurality of guide rods (302) are provided on each fixed rod (13); the plurality of guide rods (302) are slidably connected to the latch plate (301); a latch of the latch plate (301) penetrates the fixed rod (13); an elastic member III (303) is sleeved on the outer side of each guide rod (302); one end of the elastic member III (303) contacts the latch plate (301), and the other end of the elastic member III (303) contacts the fixed rod (13); The scraper ring (205) is configured to be in a conical shape with a small top and a large bottom. The latch plate (301) is spaced 5-10 cm from the tip of the fixing rod (13); The invention also includes a protection system; the protection system is connected to the outer shell of the surveying instrument (2); the protection system includes a fixing plate (401), an elastic member II (4011), a convex block (4012), a support frame (402), a top plate (4021), a baffle (403), a shielding curtain (404) and a fixing strip (405); at least two fixing plates (401) are fixedly connected to the outer shell of the surveying instrument (2); each fixing plate (401) is fixedly connected to an elastic member II (4011); each elastic member II (4011) is fixedly connected to at least two convex blocks (4012); the same elastic member II (4011) is fixedly connected to the outer shell of the surveying instrument (2); All the protrusions (4012) on the part II (4011) are slidably connected to the corresponding fixed plates (401); each fixed plate (401) has a detachable top plate (4021); each top plate (4021) is fixedly connected to a support frame (402); each support frame (402) is fixedly connected to a baffle (403); each support frame (402) is provided with a slide groove, and a shielding curtain (404) is fixedly connected in the slide groove, and at least two observation ports are provided on the shielding curtain (404); a movable end of the shielding curtain (404) is fixedly connected to a fixing strip (405); It also includes a magnetic strip (406); a magnet is provided in the fixing strip (405); all the supporting frames (402) are fixedly connected to a magnetic strip (406); It also includes a shielding plate (407); each support frame (402) is fixedly connected to the outside of a shielding plate (407); The mask plate (407) is configured to be in a cone shape.

2. According to the engineering surveying device for national land space planning according to claim 1, it is characterized in that: A ball head is provided at one end of the slide bar (208) close to the limiting rod (203) for limiting the position and reducing the friction between the slide bar (208) and the limiting rod (203).

3. The engineering surveying device for national land space planning according to claim 2 is characterized in that: It also includes a limit strip (210) and a fixing pin (211); each support leg of the tripod (1) is rotatably connected to a limit strip (210); and each support leg of the tripod (1) is fixedly connected to a fixing pin (211).

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