Constructional engineering measuring device and use method thereof

Abstract

The invention discloses a constructional engineering measuring device and a using method thereof.The measuring device comprises a measuring instrument and a supporting mechanism, the supporting mechanism comprises a mounting plate, a bottom plate, a supporting assembly and an auxiliary supporting plate, the auxiliary supporting plate comprises a first supporting plate and a second supporting plate, and the bottom plate is rotationally connected with the first supporting plate; the first supporting plate is provided with a containing cavity for the second supporting plate to move, the supporting assembly comprises a sleeve, a supporting rod and a limiting sleeve, the mounting plate is rotationally connected with the sleeve, the second supporting plate is rotationally connected with the supporting rod, the supporting rod moves in the sleeve, the limiting sleeve is in threaded connection with the sleeve, and the limiting sleeve is provided with a necking part corresponding to the supporting rod; the using method comprises the following steps: S1, unfolding the supporting mechanism and installing the measuring instrument; s2, transferring the measuring device; and S3, a shielding mechanism is installed. The measuring device is free in folding and unfolding, convenient to carry, simple in field arrangement, stable, reliable, not prone to freely toppling over, gradually ordered in using method, easy to operate, low in operation difficulty and capable of meeting different using requirements.

Description

Technical Field

[0001] This invention belongs to the field of building engineering surveying technology, and in particular relates to a building engineering surveying device and its usage method. Background Technology

[0002] In construction engineering, it is often necessary to use construction engineering surveying instruments to measure the site conditions. Construction engineering surveying instruments are various instruments used for orientation, distance measurement, angle measurement, height measurement, mapping, and photogrammetry during the planning, design, construction, and operation management stages of engineering construction. These instruments include theodolites, levels, plane tables, distance measuring instruments, gyro theodolites, laser measuring instruments, cameras, measuring instruments, plotters, projectors, and other equipment.

[0003] Existing construction engineering surveying instruments have the following drawbacks: When setting up on site, the outward extension of the support arms requires repeated adjustments to the tilt angles of each support arm to ensure that the tilt angles of each support arm are basically consistent in order to guarantee the levelness of the surveying instrument, which presents a certain degree of adjustment difficulty; the bottom ends of each support arm need to be effectively inserted into the soil to ensure that the overall placement is stable, but for harder ground, it is difficult to insert the bottom ends of each support arm into the ground, making it difficult to guarantee the overall stability. Summary of the Invention

[0004] The purpose of this invention is to solve the above-mentioned technical problems existing in the prior art, and to provide a construction engineering measurement device and its usage method. The measurement device has a novel structure, can be easily extended and retracted, is easy to carry, is stable and reliable, is not easy to tip over, has strong adaptability, and its usage method is step-by-step and orderly, easy to operate, has low operation difficulty, and can adapt to different usage needs.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A construction engineering surveying device includes: a measuring instrument and a support mechanism, with the measuring instrument mounted on the support mechanism; characterized in that: the support mechanism includes a mounting plate, a base plate, a support assembly, and an auxiliary support plate, with the measuring instrument mounted on the mounting plate; the auxiliary support plate includes a first support plate and a second support plate, the base plate being rotatably connected to the first support plate, the first support plate having a cavity for the second support plate to move, the second support plate having an elastic element, and the first support plate having a limiting through hole communicating with the cavity, the limiting through hole corresponding to the elastic element; the support assembly includes a sleeve, a support rod, and a limiting sleeve, the mounting plate being rotatably connected to the sleeve, the second support plate being rotatably connected to the support rod, the support rod moving within the sleeve, the limiting sleeve being threadedly connected to the sleeve, and the limiting sleeve having a constricted portion corresponding to the support rod, the constricted portion having a circumferential expansion joint. This surveying device has a novel structure, is easy to extend and retract, convenient to carry, stable and reliable, not easily tipped over, and highly adaptable.

[0006] Furthermore, a telescopic rod is inserted between the mounting plate and the base plate. The base plate provides support to the mounting plate through the telescopic rod, improving the load-bearing capacity of the mounting plate. The pressure applied to the mounting plate by the measuring instrument is transmitted downward to the base plate through the telescopic rod, dispersing the pressure and thus reducing the pressure on the support components, making them less prone to damage and extending their service life.

[0007] Furthermore, the telescopic rod includes an internally threaded sleeve and a threaded support rod. The internally threaded sleeve is threadedly connected to the threaded support rod. The base plate has positioning holes corresponding to the threaded support rod, and the bottom surface of the mounting plate has limiting holes corresponding to the internally threaded sleeve. The telescopic rod is easy to assemble and disassemble, can be used immediately after installation, is flexible and convenient, and its length can be flexibly adjusted to adapt to the actual height difference between the mounting plate and the base plate, making it highly adaptable.

[0008] Furthermore, a claw-shaped frame is threaded onto the threaded support rod, and a caster wheel is connected to the bottom of the claw-shaped frame. The claw-shaped frame can be rotated up and down to change its height position, thereby changing the height position of the caster wheel. When the caster wheel touches the ground, the entire unit can be moved with the help of the caster wheel, reducing the difficulty of transfer.

[0009] Furthermore, the measuring instrument has a positioning post at its bottom, and a corresponding positioning through hole on the mounting plate. A Torx screw is threaded onto the side of the mounting plate, extending into the positioning through hole. The positioning post has a corresponding transverse through hole. The measuring instrument and mounting plate are detachable, allowing for immediate use. Even if the Torx screw loosens, as long as one end of the screw hasn't completely disengaged from the transverse through hole, the positioning post cannot move within the positioning through hole, and the measuring instrument cannot move freely. This provides a better fixation compared to directly fixing the measuring instrument with bolts.

[0010] Furthermore, the second support plate is provided with a fixing groove for accommodating the elastic element. The elastic element includes a spring and a limiting block. One end of the spring is connected to the limiting block, and the other end of the spring is connected to the inner bottom surface of the fixing groove. The limiting through hole corresponds to the limiting block. The elastic element has a simple structure, low operating cost, and strong practicality.

[0011] Furthermore, a shielding mechanism is snapped onto the support assembly, located above the measuring instrument. This shielding mechanism provides sun and rain protection for the measuring instrument, offering simple protection and allowing measurement operations to be performed in scorching sun, heavy rain, and other weather conditions, demonstrating strong adaptability.

[0012] Furthermore, the shielding mechanism includes a shielding cloth, a central block, a first arm, a second arm, and a hanging rod. The central block is rotatably connected to the first arm, which is fixedly connected to the bottom surface of the shielding cloth. The first arm is rotatably connected to the second arm, which is rotatably connected to the hanging rod. The hanging rod is hooked onto the first arm, and a corresponding sleeve is rotatably connected to the bottom of the second arm. The shielding mechanism is easy to deploy and retract, portable, simple to assemble and disassemble, convenient for on-site deployment, stable and reliable in installation, and highly practical.

[0013] Furthermore, a hook is rotatably connected to one end of the hanging rod, and a hanging lug is provided on the first arm, with a hanging hole corresponding to the hook. When the hook is hung into the hanging hole, the second arm supports the first arm through the hanging rod, forming a triangular structure system. The first and second arms cannot rotate relative to each other. The circumferentially distributed first arms open the covering cloth, allowing the covering cloth to be fully unfolded, ensuring sufficient coverage.

[0014] A method for using a construction engineering surveying device, characterized by comprising the following steps: S1. When in use, first rotate the first support plate downwards to make the first support plate contact the ground, and then pull the second support plate outwards from the first support plate to unfold the auxiliary support plate. The second support plate will then drive the support rod to slide out of the sleeve to unfold the support assembly. When the elastic element on the second support plate meets the limiting through hole on the first support plate, the elastic element passes through the limiting through hole, restricting the free sliding of the second support plate. Then, the limiting sleeve on the sleeve is rotated, so that the constricted part on the limiting sleeve clamps the support rod, restricting the free sliding of the support rod. Screw the claw-shaped bracket onto the threaded support of the telescopic rod, then insert the threaded support into the positioning hole on the bottom plate. Next, rotate the internal threaded sleeve of the telescopic rod upwards so that the internal threaded sleeve is embedded in the limiting hole on the bottom surface of the mounting plate, thus limiting the telescopic rod between the mounting plate and the bottom plate. Pass the positioning pin at the bottom of the measuring instrument through the positioning through hole on the mounting plate from top to bottom, and then turn the Torx handle screw inward so that one end of it passes through the horizontal through hole on the positioning pin, restricting the free movement of the positioning pin and limiting the measuring instrument to the mounting plate, so that the measuring instrument can be used for measurement. S2. During the transfer, rotate the claw frame downwards to drive the casters at the bottom of the claw frame downwards until the bottom surface of the casters is lower than the bottom surface of the auxiliary support plate, so that the casters contact the ground and the whole unit moves with the help of the casters. S3. When providing shade or rain protection, install the shading mechanism on the support assembly. First, rotate the first arm outward to unfold the shading cloth. Then, rotate the hanging rod so that the hook at one end of the hanging rod hooks onto the hanging ear on the first arm. The second arm supports the first arm through the hanging rod. Next, clip the sleeve at the bottom of the second arm onto the sleeve to limit the second arm to the sleeve. Installation is complete.

[0015] The present invention, by adopting the above-described technical solution, has the following beneficial effects: 1. The measuring instrument and the mounting plate are detachable, allowing for immediate installation and use. The Torx handle screw restricts the positioning pin from moving up and down in the positioning through hole, ensuring the measuring instrument is firmly and reliably positioned on the mounting plate. Even if the Torx handle screw loosens, one end of the Torx handle screw will not completely come out of the transverse through hole, preventing the positioning pin from moving within the positioning through hole and thus restricting the measuring instrument's movement. This provides a better fixation effect compared to directly fixing the measuring instrument with bolts.

[0016] 2. The support mechanism is flexible in deployment and retraction, easy to carry, and simple to set up on site. By changing the length of the auxiliary support plate, the contact area between the support mechanism and the ground is changed, thereby ensuring the overall placement stability. The base plate provides support to the mounting plate through the telescopic rod, which not only improves the levelness of the mounting plate, thus improving the levelness of the measuring instrument, but also increases the load-bearing capacity of the mounting plate. The pressure applied to the mounting plate by the measuring instrument is transmitted downward to the base plate through the telescopic rod, dispersing the pressure and reducing the pressure on the support components, making them less prone to damage and extending their service life. The telescopic rod, support components, and auxiliary support plate form a triangular structure system, ensuring the structural stability of the support mechanism when deployed, preventing it from tipping over freely, and ensuring reliable support.

[0017] 3. The claw-shaped frame can be detached from the threaded support rod, making it easy to install and use, and also convenient to carry; the claw-shaped frame can be rotated up and down to change its height position, thereby changing the height position of the casters. When the casters touch the ground, the whole unit can be moved with the help of the casters, reducing the difficulty of transfer.

[0018] 4. The shielding cloth provides sun and rain protection for the measuring instrument, offering simple protection. It allows for measurement operations in scorching sun and heavy rain, demonstrating strong adaptability. The shielding mechanism is easy to deploy and retract, convenient to carry, simple to assemble and disassemble, easy to set up on site, and provides stable and reliable installation, making it highly practical. The second arm, hanging rod, and first arm form a triangular structure system, ensuring stable deployment. The first and second arms cannot rotate relative to each other. The circumferentially distributed first arm expands the shielding cloth, allowing it to fully unfold and ensuring sufficient shielding coverage. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings: Figure 1 This is a schematic diagram of the structure of a building engineering measurement device according to the present invention; Figure 2 This is a schematic diagram of the shielding mechanism in this invention; Figure 3 This is a schematic diagram of the connection between the support mechanism and the measuring instrument in this invention; Figure 4 This is a schematic diagram of the measuring instrument in this invention; Figure 5 This is a schematic diagram of the mounting plate in this invention; Figure 6 This is a schematic diagram showing the unfolded support mechanism in this invention; Figure 7 This is a schematic diagram of the connection between the limiting sleeve and the support rod in this invention; Figure 8 This is a schematic diagram of the connection between the threaded support rod and the claw-shaped frame in this invention; Figure 9 This is a schematic diagram of the connection between the second support plate and the elastic element in this invention.

[0020] In the diagram: 1-Measuring instrument; 2-Mounting plate; 3-Base plate; 4-First support plate; 5-Second support plate; 6-Receiving cavity; 7-Fixing groove; 8-Spring; 9-Limiting block; 10-Limiting through hole; 11-Sleeve; 12-Support rod; 13-Limiting sleeve; 14-Narrowing part; 15-Positioning post; 16-Positioning through hole; 17-Plum handle screw; 18-Transverse through hole; 19-Internal threaded sleeve; 20-Threaded support rod; 21-Positioning hole; 22-Limiting hole; 23-Center threaded sleeve; 24-Bending arm; 25-Universal wheel; 26-Shielding mechanism; 27-Shielding cloth; 28-Center block; 29-First support arm; 30-Second support arm; 31-Hanging rod; 32-Hook; 33-Hanging ear; 34-Clamping sleeve. Detailed Implementation

[0021] like Figures 1 to 9 As shown, a construction engineering measurement device according to the present invention includes: a measuring instrument 1 and a support mechanism. The support mechanism includes a mounting plate 2, a base plate 3, a support assembly and an auxiliary support plate. The auxiliary support plate includes a first support plate 4 and a second support plate 5. The base plate 3 is rotatably connected to the first support plate 4. The first support plate 4 is circumferentially distributed. The first support plate 4 is provided with a receiving cavity 6 for the second support plate 5 to move. The second support plate 5 is provided with a fixing groove 7. An elastic element is provided in the fixing groove 7. The elastic element includes a spring 8 and a limiting block 9. One end of the spring 8 is connected to the limiting block 9, and the other end of the spring 8 is connected to the inner bottom surface of the fixing groove 7. The first support plate 4 is provided with a limiting through hole 10 communicating with the receiving cavity 6. The limiting through holes 10 are equidistantly distributed and correspond to the limiting blocks 9.

[0022] Press the limiting block 9 so that it retracts completely into the fixed groove 7. The spring 8 is compressed, allowing the second support plate 5 to slide, changing the length of the auxiliary support plate and thus changing the contact area between the support mechanism and the ground, thereby ensuring the overall placement stability. When the limiting block 9 meets the next limiting through hole 10, the rebound force generated by the spring 8 acts on the limiting block 9, causing it to pass through the limiting through hole 10. The limiting block 9 is located between the limiting through hole 10 and the fixed groove 7, restricting the free sliding of the second support plate 5. The length of the auxiliary support plate is fixed, making adjustment simple. The elastic element structure is simple, the cost of use is low, and the practicality is strong.

[0023] The support assembly includes a sleeve 11, a support rod 12, and a limiting sleeve 13. The mounting plate 2 is rotatably connected to the sleeve 11, which is circumferentially distributed. The second support plate 5 is rotatably connected to the support rod 12, which is movable in the sleeve 11. The limiting sleeve 13 is threadedly connected to the sleeve 11 and has a constricted portion 14 corresponding to the support rod 12. The constricted portion 14 has a deformation joint circumferentially opened.

[0024] Pulling the support rod 12 inward and outward allows for flexible adjustment of the support component's length, adapting it to the length of the auxiliary support plate. Once the length is determined, rotating the limiting sleeve 13 clamps the support rod 12 through the constriction portion 14. The inner wall of the constriction portion 14 tightly abuts against the outer wall of the support rod 12, resulting in high friction and restricting the free sliding of the support rod 12. After the length of the support component is fixed, the mounting plate 2 supports the auxiliary support plate through the support component, restricting the free rotation of the first support plate 4 and ensuring stable contact between the auxiliary support plate and the ground. This guarantees the stability of the support mechanism. The auxiliary support plate provides circumferential support to the mounting plate 2 through the support component, improving the stability of the mounting plate 2 and thus enhancing the stability of the measuring instrument 1.

[0025] The support mechanism can be retracted. The limiting sleeve 13 is rotated in the opposite direction so that the constricted part 14 no longer clamps the support rod 12. Then, the limiting block 9 is pressed so that it is completely retracted into the fixing groove 7. The second support plate 5 is slid inward so that it enters the receiving cavity 6. The auxiliary support plate is shortened. Then, the first support plate 4 is rotated upward so that the support rod 12 enters the sleeve 11. The support assembly is shortened, and the auxiliary support plate and support assembly move closer to the center. The volume of the support mechanism becomes smaller, making it easier to carry.

[0026] The bottom of the measuring instrument 1 is provided with a positioning post 15, and the mounting plate 2 is provided with a positioning through hole 16 corresponding to the positioning post 15. The side of the mounting plate 2 is threaded with a Torx handle screw 17, which extends into the positioning through hole 16. The positioning post 15 is provided with a transverse through hole 18 corresponding to the Torx handle screw 17.

[0027] The measuring instrument 1 is detachable from the mounting plate, allowing for immediate installation and use. The Torx handle screw 17 restricts the positioning pin 15 from moving up and down in the positioning through hole 16, thus limiting the measuring instrument 1 to the mounting plate 2 for stability and reliability. Even if the Torx handle screw 17 loosens, one end of the Torx handle screw 17 has not completely come out of the transverse through hole 18, preventing the positioning pin 15 from moving within the positioning through hole 16 and thus restricting the measuring instrument 1's free movement. This provides a better fixation effect compared to directly fixing the measuring instrument 1 with bolts.

[0028] A telescopic rod is inserted between the mounting plate 2 and the base plate 3. The telescopic rod includes an internally threaded sleeve 19 and a threaded support rod 20. The internally threaded sleeve 19 is threadedly connected to the threaded support rod 20. The base plate 3 is provided with a positioning hole 21 corresponding to the threaded support rod 20. The bottom surface of the mounting plate 2 is provided with a limiting hole 22 corresponding to the internally threaded sleeve 19.

[0029] The telescopic rod is easy to assemble and disassemble, and can be used immediately. It is flexible and convenient, and its length can be adjusted to adapt to the actual height difference between the mounting plate 2 and the base plate 3, making it highly adaptable. The base plate 3 provides support to the mounting plate 2 through the telescopic rod, which not only improves the levelness of the mounting plate 2, thereby improving the levelness of the measuring instrument 1, but also improves the load-bearing capacity of the mounting plate 2. The pressure applied to the mounting plate 2 by the measuring instrument 1 is transmitted downward to the base plate 3 through the telescopic rod, dispersing the pressure and reducing the pressure on the support components, making them less prone to damage and extending their service life. The telescopic rod, support components, and auxiliary support plate form a triangular structure system, ensuring the structural stability of the support mechanism when deployed, making it less prone to free tilting and providing reliable support.

[0030] The threaded support rod 20 is threadedly connected to a claw-shaped frame, which includes a central threaded sleeve 23 and a bending arm 24. The central threaded sleeve 23 is threadedly connected to the threaded support rod 20, and the bending arm 24 is circumferentially distributed on the central threaded sleeve 23. The bottom of the bending arm 24 is connected to a caster wheel 25.

[0031] The claw-shaped frame can be detached from the threaded support rod 20, making it easy to install and use, and convenient to carry. The claw-shaped frame can be rotated up and down to change its height position, thereby changing the height position of the caster 25. When the caster 25 touches the ground, the whole unit can be moved with the help of the caster 25, reducing the difficulty of transfer.

[0032] A shielding mechanism 26 is snapped onto the support assembly. The shielding mechanism 26 includes a shielding cloth 27, a central block 28, a first support arm 29, a second support arm 30, and a hanging rod 31. The central block 28 is rotatably connected to the first support arm 29, which is circumferentially distributed and fixedly connected to the bottom surface of the shielding cloth 27. The first support arm 29 is rotatably connected to the second support arm 30, which is rotatably connected to the hanging rod 31. One end of the hanging rod 31 is rotatably connected to a hook 32. The first support arm 29 is provided with a hanging ear 33, which is provided with a hanging hole corresponding to the hook 32. The bottom of the second support arm 30 is rotatably connected to a clip 34, which has a C-shaped bayonet corresponding to the sleeve 11. The shielding cloth 27 is made of polyester and is located above the measuring instrument 1.

[0033] The shielding cloth 27 provides sun and rain protection for the measuring instrument 1, serving a simple protective function. It can be used for measurement operations in scorching sun and heavy rain, making it highly adaptable. The shielding mechanism 26 is easy to unfold and retract, convenient to carry, simple to assemble and disassemble, easy to set up on site, and has stable and reliable installation, making it highly practical. When the hook 32 is hung into the hanging hole, the second arm 30 supports the first arm 29 through the hanging rod 31, forming a triangular structure system. It is stable when unfolded, and there is no relative rotation between the first arm 29 and the second arm 30. The circumferentially distributed first arm 29 opens the shielding cloth 27, allowing the shielding cloth 27 to be fully unfolded, ensuring a sufficient shielding range.

[0034] A method for using a construction engineering surveying device includes the following steps: S1. When in use, first rotate the first support plate 4 downwards so that the first support plate 4 is flat and in contact with the ground. Then pull the second support plate 5 outwards from the first support plate 4 to unfold the auxiliary support plate. The second support plate 5 then drives the support rod 12 to slide out of the sleeve 11, so that the support assembly unfolds.

[0035] When the limiting block 9 on the second support plate 5 meets the limiting through hole 10 on the first support plate 4, the limiting block 9, under the rebound force of the spring 8, passes through the limiting through hole 10, restricting the free sliding of the second support plate 5. Then, the limiting sleeve 13 on the sleeve 11 is rotated, so that the constricted part 14 on the limiting sleeve 13 clamps the support rod 12, restricting the free sliding of the support rod 12.

[0036] The claw-shaped bracket is screwed onto the threaded support rod 20 of the telescopic rod. Then, the threaded support rod 20 is inserted into the positioning hole 21 on the bottom plate 3. Next, the internal threaded sleeve 19 of the telescopic rod is rotated upward so that the internal threaded sleeve 19 is embedded into the limiting hole 22 on the bottom surface of the mounting plate 2, so that the telescopic rod is limited between the mounting plate 2 and the bottom plate 3. The bottom surface of the universal wheel 25 is not lower than the bottom surface of the auxiliary support plate. At this time, the universal wheel 25 can also play a supporting role.

[0037] The positioning pin 15 at the bottom of the measuring instrument 1 is passed through the positioning through hole 16 on the mounting plate 2 from top to bottom, which is convenient for positioning and has high installation efficiency. Then, the Torx handle screw 17 is turned inward so that one end of it passes through the transverse through hole 18 on the positioning pin 15, which restricts the free movement of the positioning pin 15 and limits the measuring instrument 1 to the mounting plate 2, so that the measuring instrument 1 can be used for measurement.

[0038] S2. During the transfer, rotate the claw frame downwards to move the casters 25 at the bottom of the claw frame downwards until the bottom surface of the casters 25 is lower than the bottom surface of the auxiliary support plate, so that the casters 25 contact the ground and support the support mechanism. Move the whole structure with the help of the casters 25. Alternatively, the auxiliary support plate and support components can be shortened first to fold up the support mechanism, and then the whole structure can be moved with the help of the casters 25.

[0039] S3. When providing shade or protection from rain, install the shading mechanism 26 on the support assembly. First, rotate the first arm 29 outward to unfold the shading cloth 27. Then, rotate the hanging rod 31 so that the hook 32 at one end of the hanging rod 31 hooks the hanging ear 33 on the first arm 29. The second arm 30 supports the first arm 29 through the hanging rod 31. Next, clamp the sleeve 34 at the bottom of the second arm 30 onto the sleeve 11. The inner wall of the sleeve 34 is in close contact with the outer wall of the sleeve 11, resulting in high friction and making it difficult for the sleeve 34 to slide freely. This limits the second arm 30 to the sleeve 11, and the installation is complete.

[0040] The above are merely specific embodiments of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent substitutions, or modifications made based on the present invention to solve essentially the same technical problems and achieve essentially the same technical effects are all covered within the protection scope of the present invention.

Claims

1. A construction engineering surveying device, comprising: A measuring instrument and a supporting mechanism, wherein the measuring instrument is mounted on the supporting mechanism; characterized in that: the supporting mechanism includes a mounting plate, a base plate, a supporting assembly, and an auxiliary supporting plate, the measuring instrument being mounted on the mounting plate; the auxiliary supporting plate includes a first support plate and a second support plate, the base plate being rotatably connected to the first support plate, the first support plate having a receiving cavity for the second support plate to move, the second support plate having an elastic element, and the first support plate having a limiting through hole communicating with the receiving cavity, the limiting through hole corresponding to the elastic element; the supporting assembly includes a sleeve, a supporting rod, and a limiting sleeve, the mounting plate being rotatably connected to the sleeve, the second support plate being rotatably connected to the supporting rod, the supporting rod being movable within the sleeve, the limiting sleeve being threadedly connected to the sleeve, the limiting sleeve having a constricted portion corresponding to the supporting rod, the constricted portion having a deformation joint circumferentially opened.

2. The building engineering surveying device according to claim 1, characterized in that: A telescopic rod is inserted between the mounting plate and the base plate.

3. The building engineering surveying device according to claim 2, characterized in that: The telescopic rod includes an internally threaded sleeve and a threaded support rod. The internally threaded sleeve is threadedly connected to the threaded support rod. The base plate is provided with a positioning hole corresponding to the threaded support rod, and the bottom surface of the mounting plate is provided with a limiting hole corresponding to the internally threaded sleeve.

4. A construction engineering surveying device according to claim 3, characterized in that: The threaded support rod is threadedly connected to a claw-shaped frame, and the bottom of the claw-shaped frame is connected to a caster wheel.

5. A construction engineering surveying device according to claim 1, characterized in that: The measuring instrument has a positioning post at the bottom, and the mounting plate has a positioning through hole corresponding to the positioning post. The mounting plate is threaded with a Torx handle screw, which extends into the positioning through hole. The positioning post has a transverse through hole corresponding to the Torx handle screw.

6. A construction engineering surveying device according to claim 1, characterized in that: The second support plate is provided with a fixing groove for accommodating the elastic element. The elastic element includes a spring and a limiting block. One end of the spring is connected to the limiting block, and the other end of the spring is connected to the inner bottom surface of the fixing groove. The limiting through hole corresponds to the limiting block.

7. A construction engineering surveying device according to claim 1, characterized in that: A shielding mechanism is snapped onto the support assembly, and the shielding structure is located above the measuring instrument.

8. A construction engineering surveying device according to claim 7, characterized in that: The shielding mechanism includes a shielding cloth, a central block, a first support arm, a second support arm, and a hanging rod. The central block is rotatably connected to the first support arm, the first support arm is fixedly connected to the bottom surface of the shielding cloth, the first support arm is rotatably connected to the second support arm, the second support arm is rotatably connected to the hanging rod, the hanging rod is hooked to the first support arm, and a clamp corresponding to the sleeve is rotatably connected to the bottom of the second support arm.

9. A construction engineering surveying device according to claim 7, characterized in that: One end of the hanging rod is rotatably connected to a hook, and the first arm is provided with a hanging ear, which is provided with a hanging hole corresponding to the hook.

10. A method of using a construction engineering surveying device, characterized in that... The steps include: S1. When in use, first rotate the first support plate downwards to make it contact the ground, then pull the second support plate outwards from the first support plate to unfold the auxiliary support plate. The second support plate then drives the support rod to slide out of the sleeve, thus unfolding the support assembly. When the elastic element on the second support plate meets the limiting through hole on the first support plate, the elastic element passes through the limiting through hole, restricting the free sliding of the second support plate. Then rotate the limiting sleeve on the sleeve to make the constricted part on the limiting sleeve clamp the support rod, restricting the free sliding of the support rod. Screw the claw frame onto the threaded support rod of the telescopic rod, then insert the threaded support rod into the positioning hole on the bottom plate. Then rotate the internal threaded sleeve of the telescopic rod upwards to make the internal threaded sleeve embed into the limiting hole on the bottom surface of the mounting plate, so that the telescopic rod is limited between the mounting plate and the bottom plate. S1. Pass the positioning pin at the bottom of the measuring instrument through the positioning through hole on the mounting plate from top to bottom, and then turn the Torx handle screw inward so that one end of it passes through the horizontal through hole on the positioning pin, restricting the free movement of the positioning pin and limiting the measuring instrument to the mounting plate. Then, perform the measurement operation through the measuring instrument. S2. When transferring, rotate the claw frame downward to drive the universal wheel at the bottom of the claw frame to move downward until the bottom surface of the universal wheel is lower than the bottom surface of the auxiliary support plate, so that the universal wheel contacts the ground and moves the whole unit with the help of the universal wheel. S3. When providing sunshade or rain protection, install the shielding mechanism on the support assembly. First, rotate the first arm outward to unfold the shielding cloth, and then rotate the hanging rod so that the hook at one end of the hanging rod hooks the hanging ear on the first arm. The second arm supports the first arm through the hanging rod. Then, clamp the sleeve at the bottom of the second arm onto the sleeve to limit the second arm to the sleeve. The installation is complete.

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