Flatness detection device for constructional engineering

Abstract

The invention discloses a flatness detection device for constructional engineering, and relates to the technical field of flatness detection, and the flatness detection device comprises a moving frame, a fixed frame is fixedly installed at the bottom of the moving frame, rollers are rotatably installed on the inner wall of the fixed frame, a groove is formed in the surface of the moving frame, and a measuring plate is fixedly installed on the inner wall of the groove. The inner wall of the groove is fixedly provided with a sensor, the surface of the measuring plate is fixedly provided with a square sliding block, the bottom of the square sliding block is fixedly provided with an L-shaped frame, the top of the square sliding block is provided with an L-shaped pull rod, and the inner wall of the L-shaped frame is rotatably provided with a measuring pulley; the detection device is arranged on the surface of the measurement plate, the detection device comprises a square frame, a rotating plate, a push plate, a sliding plate, a rotating plate, a limiting plate, a square block, a sliding block, a connecting plate and an L-shaped plate, the push plate can block impurities blocked in front of the measurement pulley, the impurities are prevented from jacking up the measurement pulley, and the detection result is prevented from being influenced.

Description

Technical Field

[0001] The invention relates to the technical field of flatness detection, in particular to a flatness detection device for construction engineering. Background Art

[0002] In the construction industry, after the ground construction is completed, it is necessary to conduct a flatness test and compare its deviation value with the design deviation range to determine whether the construction quality meets the standards, so as to facilitate the normal progress of the next step of the construction project.

[0003] The patent with patent announcement number CN216205977U relates to a flatness detection device for construction engineering, including a mobile base, a measuring sleeve rod is fixed to the outer wall of one end of the front side of the mobile base, a mobile measuring rod is slidably sleeved at the bottom of the measuring sleeve rod, fixed slide grooves are provided on the side walls at both ends of the inner cavity of the measuring sleeve rod, a lifting slider slidably connected to the fixed slide groove is fixed to the top of the mobile measuring rod, the lifting slider is elastically connected to the top of the inner cavity of the measuring sleeve rod through a telescopic spring, a pulley mounting seat is fixed to the bottom of the mobile measuring rod, a measuring pulley is installed at the bottom of the pulley mounting seat, and a positioning detection mechanism is arranged on the top of the mobile base. If the patent encounters a raised part on the ground, the measuring pulley drives the lifting slider to rise, records the risen distance, and marks the position of the raised part on the detection tape measure. If the ground is sunken, the measuring pulley drives the lifting slider to descend, records the descending distance, and marks the position of the sunken part on the detection tape measure to facilitate subsequent repair.

[0004] In the above patent, the lifting slider is driven up by the measuring pulley, the rising distance is recorded, and the position of the protrusion is marked on the detection tape. If the ground is sunken, the measuring pulley drives the lifting slider down, the descending distance is recorded, and the position of the depression is marked on the detection tape to facilitate subsequent repair. However, during the detection process, there may be some impurities on the ground. The impurities contacting the measuring pulley may cause deviations in the detection data and affect the detection effect. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a flatness detection device for construction engineering, which solves the problems raised in the above-mentioned background technology.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a flatness detection device for construction engineering, comprising: a mobile frame, a fixed frame is fixedly installed at the bottom of the mobile frame, a roller is rotatably installed on the inner wall of the fixed frame, a groove is opened on the surface of the mobile frame, a measuring plate is fixedly installed on the inner wall of the groove, a sensor is fixedly installed on the inner wall of the groove, a square slider is fixedly installed on the surface of the measuring plate, an L-shaped frame is fixedly installed at the bottom of the square slider, an L-shaped pull rod is installed on the top of the square slider, and a measuring pulley is rotatably installed on the inner wall of the L-shaped frame; a detection device, the detection device is arranged on the surface of the measuring plate, the detection device comprises a square frame, a rotating plate, a push plate, a sliding plate, a rotating plate, a limit plate, a square block, a sliding block, a connecting plate and an L-shaped plate, which contacts the ground through the measuring pulley, and pushes the measuring plate when encountering a raised or recessed place The pulley moves upward or downward, and the measuring pulley moves upward or downward, which drives the L-shaped frame to move upward or downward. The L-shaped frame moves upward or downward, which drives the square slider to move upward or downward. The square frame is fixedly installed at the bottom of the moving frame, and the rotating plate is rotatably installed on the inner wall of the square frame. The pushing plate is fixedly installed at the bottom of the rotating plate, and the sliding plate is slidably installed at the bottom of the square frame. The rotating plate is rotatably installed at the bottom of the sliding plate, and the limiting plate is fixedly installed at the bottom of the sliding plate. The square block is fixedly installed on the surface of the L-shaped frame, and the sliding block is slidably installed on the inner wall of the square frame. The connecting plate is fixedly installed on the surface of the sliding block. The L-shaped plate is fixedly installed on the top of the sliding plate. The movement of the connecting plate in the direction away from the square block will push the L-shaped plate to move in the direction away from the square block, and the movement of the L-shaped plate in the direction away from the square block will drive the sliding plate to move in the direction away from the square block.

[0007] According to the above technical solution, a No. 1 spring is arranged between the measuring plate and the square slider, and the square slider is reset by the No. 1 spring; a No. 1 torsion spring is arranged between the rotating plate and the square frame, and the rotating plate is reset by the No. 1 torsion spring; a No. 2 spring is arranged between the sliding plate and the square frame, and the sliding plate is reset by the No. 2 spring; a No. 3 spring is arranged between the sliding block and the square frame, and the sliding block is reset by the No. 3 spring; a No. 2 torsion spring is arranged between the rotating plate and the sliding plate, and the rotating plate is reset by the No. 2 torsion spring.

[0008] According to the above technical solution, a marking device for marking uneven ground is provided on the measuring plate, and a limiting device is provided on the marking device. The marking device includes a connecting frame, a rotating wheel and a measuring slide. When the measuring pulley contacts the protrusion and the concave place, it will move up or down. The upward or downward movement of the measuring pulley will drive the connecting frame to move up or down, and the upward or downward movement of the connecting frame will drive the rotating wheel to move up or down. The connecting frame is fixedly installed on the surface of the square slider, the rotating wheel is rotatably installed on the inner wall of the connecting frame, and the measuring slide is slidably installed on the surface of the measuring plate.

[0009] According to the above technical solution, an L-shaped rod is slidably installed on the surface of the L-shaped frame, an L-shaped short plate is fixedly installed on the surface of the L-shaped rod, a sliding rod is slidably installed inside the L-shaped frame, a trapezoidal plate is fixedly installed on the top of the sliding rod, an elastic telescopic rod is fixedly installed on the bottom of the sliding rod, and a marking pen is fixedly installed on the free end of the elastic telescopic rod. The downward movement of the trapezoidal plate will drive the sliding rod to move downward, the downward movement of the sliding rod will drive the elastic telescopic rod to move downward, and the downward movement of the elastic telescopic rod will drive the marking pen to move downward.

[0010] According to the above technical solution, a No. 4 spring is arranged between the measuring slide and the measuring plate, and the measuring slide is reset by the No. 4 spring. A No. 5 spring is arranged between the L-shaped frame and the L-shaped rod, and the L-shaped rod is reset by the No. 5 spring. A No. 6 spring is arranged between the L-shaped frame and the sliding rod, and the sliding rod is reset by the No. 6 spring.

[0011] According to the above technical solution, the limiting device includes a sliding seat, a rotating plate, a limiting block, a short plate and an elastic telescopic plate. The L-shaped pull rod is moved upward to drive the contact to rotate, and the rotating plate is pushed to rotate upward. When the L-shaped pull rod is disengaged from the rotating plate, the sliding seat is slidably installed on the surface of the measuring plate, and the rotating plate is rotatably installed on the surface of the sliding seat. The limiting block is fixedly installed on the circumferential surface of the rotating plate, the short plate is fixedly installed on the top of the sliding seat, and the elastic telescopic plate is fixedly installed on the surface of the measuring plate.

[0012] According to the above technical solution, an L-shaped long plate is fixedly installed at the free end of the elastic telescopic plate, a trapezoidal block is fixedly installed on a side of the L-shaped long plate away from the elastic telescopic plate, and a baffle is fixedly installed on the surface of the measuring slide plate. The baffle is driven to move toward the middle of the measuring plate by the measuring slide plate moving toward the middle of the measuring plate. The movement of the baffle toward the middle of the measuring plate will push the trapezoidal block and the L-shaped long plate to move upward, and the upward movement of the L-shaped long plate will drive the free end of the elastic telescopic plate to move upward.

[0013] According to the above technical solution, a No. 7 spring is arranged between the sliding seat and the measuring plate, and the No. 7 spring drives the sliding seat to reset. A No. 3 torsion spring is arranged between the rotating plate and the sliding seat, and the No. 3 torsion spring drives the rotating plate to reset.

[0014] The present invention provides a flatness detection device for construction engineering, which has the following beneficial effects: (1) The invention, through the contact between the measuring pulley and the ground, when encountering a raised or recessed area, it will push the measuring pulley to move upward or downward, and the height of the square slider rising or falling will be displayed on the measuring plate. At the same time, the limit plate will limit the rotating plate in one direction. The rotating plate is used to limit the rotating plate to prevent the rotating plate from rotating when pushing too heavy materials, thereby affecting the detection effect. The L-shaped plate moves in the direction away from the square block, which will drive the sliding plate to move in the direction away from the square block. The sliding plate moves in the direction away from the square block, which will drive the rotating plate to release the limit on the rotating plate, so that the No. 1 torsion spring drives the rotating plate to reset, thereby improving the protection of the equipment and increasing the service life.

[0015] (2) In the present invention, the upward or downward movement of the rotating wheel will push the measuring slide plate to move away from the rotating wheel. The measuring slide plate moves away from the rotating wheel, and the height of the protrusion or depression is detected by the sensor through the rising or falling height of the rotating wheel. At the same time, the downward movement of the sliding rod will drive the elastic telescopic rod to move downward, and the downward movement of the elastic telescopic rod will drive the marking pen to move downward. The marking pen moves downward and contacts the ground, leaving a mark on the ground, which is convenient for subsequent workers to handle.

[0016] (3) The invention limits the rotating plate by a limit block to prevent the L-shaped pull rod from moving downward. When the equipment needs to be used, the sliding seat is slid and the sliding seat moves away from the L-shaped pull rod to release the limit on the L-shaped pull rod. When the short plate is separated from the free end of the elastic telescopic plate, the elastic force of the elastic telescopic plate itself will drive the free end of the elastic telescopic plate to reset and limit the short plate. There is no need to pull the sliding seat by hand all the time, which improves applicability. At the same time, the upward movement of the L-shaped long plate will drive the free end of the elastic telescopic plate to move upward. The upward movement of the free end of the elastic telescopic plate will release the limit on the short plate, so that the short plate and the sliding seat are reset, which is convenient for subsequent use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the overall cross-sectional structure of the present invention; Figure 3 It is a schematic diagram of the cross-sectional structure of a square frame of the present invention; Figure 4 For the present invention Figure 3 A schematic diagram of the structure enlargement of part A; Figure 5 It is a structural schematic diagram of the marking device of the present invention; Figure 6 For the present invention Figure 5 A schematic diagram of the structure of part B in the middle is enlarged; Figure 7 It is a schematic diagram of the structure of the limiting device of the present invention; Figure 8 For the present invention Figure 7 Schematic diagram of the enlarged structure of part C in the middle.

[0018] In the figure: 1, mobile frame; 2, fixed frame; 3, roller; 4, measuring plate; 41, sensor; 5, square slider; 6, L-shaped frame; 7, measuring pulley; 8, square frame; 9, rotating plate; 10, push plate; 11, sliding plate; 12, rotating plate; 13, limiting plate; 14, square block; 15, sliding block; 16, connecting plate; 17, L-shaped plate; 181, connecting frame; 182, rotating wheel; 183, measuring slide plate; 184, L-shaped rod; 185, L-shaped short plate; 186, sliding rod; 187, trapezoidal plate; 188, elastic telescopic rod; 189, marking pen; 1810, L-shaped pull rod; 191, sliding seat; 192, rotating plate; 193, limiting block; 194, short plate; 195, elastic telescopic plate; 196, L-shaped long plate; 197, trapezoidal block; 198, baffle. DETAILED DESCRIPTION

[0019] 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.

[0020] See also Figure 1-Figure 4, one embodiment of the present invention is: a flatness detection device for construction engineering, comprising: a mobile frame 1, a fixed frame 2 is fixedly installed at the bottom of the mobile frame 1, a roller 3 is rotatably installed on the inner wall of the fixed frame 2, a groove is opened on the surface of the mobile frame 1, a measuring plate 4 is fixedly installed on the inner wall of the groove, a sensor 41 is fixedly installed on the inner wall of the groove, a square slider 5 is fixedly installed on the surface of the measuring plate 4, an L-shaped frame 6 is fixedly installed at the bottom of the square slider 5, an L-shaped pull rod 1810 is installed on the top of the square slider 5, and a measuring pulley 7 is rotatably installed on the inner wall of the L-shaped frame 6; a detection device, the detection device is arranged on the surface of the measuring plate 4, the detection device comprises a square frame 8, a rotating plate 9, a push plate 10, a sliding plate 11, a rotating plate 12, a limit plate 13, a square block 14, a sliding block 15, a connecting plate 16 and an L-shaped plate 17, a push plate 10 will block the impurities in front of the measuring pulley 7 to prevent the impurities from lifting the measuring pulley 7 and affecting the detection result. The square frame 8 is fixedly installed at the bottom of the mobile frame 1, the rotating plate 9 is rotatably installed on the inner wall of the square frame 8, the push plate 10 is fixedly installed at the bottom of the rotating plate 9, the sliding plate 11 is slidably installed at the bottom of the square frame 8, the rotating plate 12 is rotatably installed at the bottom of the sliding plate 11, the limit plate 13 is fixedly installed at the bottom of the sliding plate 11, the square block 14 is fixedly installed on the surface of the L-shaped frame 6, the sliding block 15 is slidably installed on the inner wall of the square frame 8, the connecting plate 16 is fixedly installed on the surface of the sliding block 15, and the L-shaped plate 17 is fixedly installed on the top of the sliding plate 11. The movement of the sliding plate 11 away from the square block 14 will drive the rotating plate 12 to release the limit on the rotating plate 9, thereby improving the protection of the equipment and improving the service life.

[0021] A No. 1 spring is arranged between the measuring plate 4 and the square slider 5, and the square slider 5 is reset by the No. 1 spring. A No. 1 torsion spring is arranged between the rotating plate 9 and the square frame 8, and the rotating plate 9 is reset by the No. 1 torsion spring. A No. 2 spring is arranged between the sliding plate 11 and the square frame 8, and the sliding plate 11 is reset by the No. 2 spring. A No. 3 spring is arranged between the sliding block 15 and the square frame 8, and the sliding block 15 is reset by the No. 3 spring. A No. 2 torsion spring is arranged between the rotating plate 12 and the sliding plate 11, and the rotating plate 12 is reset by the No. 2 torsion spring.

[0022] When the present embodiment is working, the measuring pulley 7 contacts with the ground and when encountering a raised or recessed place, the measuring pulley 7 will be pushed to move upward or downward, and the measuring pulley 7 moving upward or downward will drive the L-shaped frame 6 to move upward or downward, and the L-shaped frame 6 moving upward or downward will drive the square slider 5 to move upward or downward, and the rising or falling height of the square slider 5 will be displayed on the measuring plate 4. At the same time, when detecting, the rotating plate 9 will be pushed to rotate downward, and the rotating plate 9 will drive the push plate 10 to rotate downward, and the push plate 10 will block the impurities in front of the measuring pulley 7 to prevent the impurities from lifting the measuring pulley 7 and affecting the detection result. At the same time, the rotation of the rotating plate 9 will push the rotating plate 12 to rotate. When the rotating plate 9 is separated from the rotating plate 12, the No. 2 torsion spring will drive the reset, and the rotating plate 12 will be limited in one direction by the limiting plate 13. The rotating plate 9 is limited by the rotating plate 12 to prevent the rotating plate 9 from rotating when pushing too heavy materials. , affecting the detection effect. When not in use, pull the L-shaped pull rod 1810 upward. The upward movement of the L-shaped pull rod 1810 will drive the square slider 5 and the L-shaped frame 6 to move upward. The upward movement of the L-shaped frame 6 will drive the square block 14 to move upward. The upward movement of the square block 14 will push the sliding block 15 to move in the direction away from the square block 14. The sliding block 15 moving in the direction away from the square block 14 will drive the connecting plate 16 to move in the direction away from the square block 14. The connecting plate 16 moving in the direction away from the square block 14 will push the L-shaped plate 17 to move in the direction away from the square block 14. The L-shaped plate 17 moving in the direction away from the square block 14 will drive the sliding plate 11 to move in the direction away from the square block 14. The sliding plate 11 moving in the direction away from the square block 14 will drive the rotating plate 12 to release the limit on the rotating plate 9, so that the No. 1 torsion spring drives the rotating plate 9 to reset, thereby improving the protection of the equipment and increasing the service life.

[0023] See also Figure 1-Figure 7 On the basis of the above embodiment, in another embodiment of the present invention, a marking device for marking an uneven ground is provided on the measuring plate 4, and a limiting device is provided on the marking device. The marking device includes a connecting frame 181, a rotating wheel 182 and a measuring slide 183. The connecting frame 181 is fixedly mounted on the surface of the square slider 5, the rotating wheel 182 is rotatably mounted on the inner wall of the connecting frame 181, and the measuring slide 183 is slidably mounted on the surface of the measuring plate 4. The measuring slide 183 moves in a direction away from the rotating wheel 182, and the height of the protrusion or depression is detected by the sensor 41 through the rising or falling height of the rotating wheel 182.

[0024] An L-shaped rod 184 is slidably installed on the surface of the L-shaped frame 6, and an L-shaped short plate 185 is fixedly installed on the surface of the L-shaped rod 184. A sliding rod 186 is slidably installed inside the L-shaped frame 6, and a trapezoidal plate 187 is fixedly installed on the top of the sliding rod 186. An elastic telescopic rod 188 is fixedly installed on the bottom of the sliding rod 186, and a marking pen 189 is fixedly installed on the free end of the elastic telescopic rod 188. The marking pen 189 moves downward to contact the ground and leaves a mark on the ground, which is convenient for subsequent workers to handle.

[0025] A No. 4 spring is arranged between the measuring slide 183 and the measuring plate 4, and the measuring slide 183 is reset by the No. 4 spring. A No. 5 spring is arranged between the L-shaped frame 6 and the L-shaped rod 184, and the L-shaped rod 184 is reset by the No. 5 spring. A No. 6 spring is arranged between the L-shaped frame 6 and the sliding rod 186, and the sliding rod 186 is reset by the No. 6 spring.

[0026] The limiting device includes a sliding seat 191, a rotating plate 192, a limiting block 193, a short plate 194 and an elastic telescopic plate 195. The sliding seat 191 is slidably installed on the surface of the measuring plate 4, the rotating plate 192 is rotatably installed on the surface of the sliding seat 191, the limiting block 193 is fixedly installed on the circumferential surface of the rotating plate 192, the short plate 194 is fixedly installed on the top of the sliding seat 191, and the elastic telescopic plate 195 is fixedly installed on the surface of the measuring plate 4. The limiting block 193 will limit the rotating plate 192 to prevent the L-shaped pull rod 1810 from moving downward.

[0027] An L-shaped long plate 196 is fixedly installed at the free end of the elastic telescopic plate 195, and a trapezoidal block 197 is fixedly installed on the side of the L-shaped long plate 196 away from the elastic telescopic plate 195. A baffle 198 is fixedly installed on the surface of the measuring slide plate 183. The upward movement of the free end of the elastic telescopic plate 195 will release the limit on the short plate 194, so that the short plate 194 and the sliding seat 191 are reset, which is convenient for subsequent use.

[0028] A No. 7 spring is arranged between the sliding seat 191 and the measuring plate 4, and the sliding seat 191 is reset by the No. 7 spring. A No. 3 torsion spring is arranged between the rotating plate 192 and the sliding seat 191, and the rotating plate 192 is reset by the No. 3 torsion spring.

[0029] When the present embodiment is working, when the measuring pulley 7 contacts the protrusion, the concave part will move upward or downward. The upward or downward movement of the measuring pulley 7 will drive the connecting frame 181 to move upward or downward. The upward or downward movement of the connecting frame 181 will drive the rotating wheel 182 to move upward or downward. The upward or downward movement of the rotating wheel 182 will push the measuring slide 183 to move away from the rotating wheel 182. The measuring slide 183 moves away from the rotating wheel 182. The height of the protrusion or the concave height is detected by the sensor 41 through the rising or falling height of the rotating wheel 182. At the same time, when the measuring slide 183 moves away from the rotating wheel 182, it will push the L-shaped rod 184 moves in the direction away from the rotating wheel 182, the L-shaped rod 184 moving in the direction away from the rotating wheel 182 will drive the L-shaped short plate 185 to move in the direction away from the rotating wheel 182, the L-shaped short plate 185 moving in the direction away from the rotating wheel 182 will push the trapezoidal plate 187 to move downward, the trapezoidal plate 187 moving downward will drive the sliding rod 186 to move downward, the sliding rod 186 moving downward will drive the elastic telescopic rod 188 to move downward, the elastic telescopic rod 188 moving downward will drive the marking pen 189 to move downward, the marking pen 189 moves downward and contacts the ground, and leaves a mark on the ground, which is convenient for subsequent workers to handle.

[0030] The L-shaped pull rod 1810 moves upward and contacts the rotating plate 192, and the rotating plate 192 is pushed to rotate upward. When the L-shaped pull rod 1810 is disengaged from the rotating plate 192, the No. 3 torsion spring will drive the rotating plate 192 to reset, and at the same time, the limit block 193 will limit the rotating plate 192 to prevent the L-shaped pull rod 1810 from moving downward. When the equipment needs to be used, the sliding seat 191 is slid, and the sliding seat 191 moves away from the L-shaped pull rod 1810 to release the limit on the L-shaped pull rod 1810. The sliding seat 191 moves away from the L-shaped pull rod 1810 and drives the short plate 194 to move away from the L-shaped pull rod 1810. The short plate 194 moves away from the L-shaped pull rod 1810 and contacts the free end of the elastic telescopic plate 195, and the short plate 194 pushes the free end of the elastic telescopic plate 195 upward When the short plate 194 is separated from the free end of the elastic telescopic plate 195, the elastic force of the elastic telescopic plate 195 itself will drive the free end of the elastic telescopic plate 195 to reset and limit the short plate 194. There is no need to pull the sliding seat 191 by hand all the time, which improves applicability. At the same time, the resetting of the L-shaped pull rod 1810 will disengage from the squeezing of the measuring slide plate 183, and the movement of the measuring slide plate 183 toward the middle of the measuring plate 4 will drive the baffle 198 to move toward the middle of the measuring plate 4. The movement of the baffle 198 toward the middle of the measuring plate 4 will push the trapezoidal block 197 and the L-shaped long plate 196 to move upward. The upward movement of the L-shaped long plate 196 will drive the free end of the elastic telescopic plate 195 to move upward. The upward movement of the free end of the elastic telescopic plate 195 will release the limitation on the short plate 194, so that the short plate 194 and the sliding seat 191 are reset, which is convenient for subsequent use.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A flatness detection device for construction engineering, characterized in that: include: A mobile frame (1), wherein a fixed frame (2) is fixedly mounted at the bottom of the mobile frame (1), a roller (3) is rotatably mounted on the inner wall of the fixed frame (2), a groove is formed on the surface of the mobile frame (1), a measuring plate (4) is fixedly mounted on the inner wall of the groove, a sensor (41) is fixedly mounted on the inner wall of the groove, a square slider (5) is fixedly mounted on the surface of the measuring plate (4), an L-shaped frame (6) is fixedly mounted at the bottom of the square slider (5), an L-shaped pull rod (1810) is mounted on the top of the square slider (5), and a measuring pulley (7) is rotatably mounted on the inner wall of the L-shaped frame (6); A detection device, the detection device is arranged on the surface of a measuring plate (4), the detection device comprises a square frame (8), a rotating plate (9), a push plate (10), a sliding plate (11), a rotating plate (12), a limit plate (13), a square block (14), a sliding block (15), a connecting plate (16) and an L-shaped plate (17), the square frame (8) is fixedly mounted on the bottom of the moving frame (1), the rotating plate (9) is rotatably mounted on the inner wall of the square frame (8), and the push plate (10) is fixedly mounted on the rotating plate ( 9) bottom, the sliding plate (11) is slidably mounted on the bottom of the square frame (8), the rotating plate (12) is rotatably mounted on the bottom of the sliding plate (11), the limiting plate (13) is fixedly mounted on the bottom of the sliding plate (11), the square block (14) is fixedly mounted on the surface of the L-shaped frame (6), the sliding block (15) is slidably mounted on the inner wall of the square frame (8), the connecting plate (16) is fixedly mounted on the surface of the sliding block (15), and the L-shaped plate (17) is fixedly mounted on the top of the sliding plate (11); Wherein, a marking device for marking uneven ground is provided on the measuring plate (4), and a limiting device is provided on the marking device.

2. A flatness detection device for construction engineering according to claim 1, characterized in that: A No. 1 spring is arranged between the measuring plate (4) and the square slider (5), a No. 1 torsion spring is arranged between the rotating plate (9) and the square frame (8), a No. 2 spring is arranged between the sliding plate (11) and the square frame (8), a No. 3 spring is arranged between the sliding block (15) and the square frame (8), and a No. 2 torsion spring is arranged between the rotating plate (12) and the sliding plate (11).

3. A flatness detection device for construction engineering according to claim 2, characterized in that: The marking device comprises a connecting frame (181), a rotating wheel (182) and a measuring slide plate (183); the connecting frame (181) is fixedly mounted on the surface of a square slider (5); the rotating wheel (182) is rotatably mounted on the inner wall of the connecting frame (181); and the measuring slide plate (183) is slidably mounted on the surface of a measuring plate (4).

4. A flatness detection device for construction engineering according to claim 3, characterized in that: An L-shaped rod (184) is slidably mounted on the surface of the L-shaped frame (6), an L-shaped short plate (185) is fixedly mounted on the surface of the L-shaped rod (184), a sliding rod (186) is slidably mounted inside the L-shaped frame (6), a trapezoidal plate (187) is fixedly mounted on the top of the sliding rod (186), an elastic telescopic rod (188) is fixedly mounted on the bottom of the sliding rod (186), and a marking pen (189) is fixedly mounted on the free end of the elastic telescopic rod (188).

5. A flatness detection device for construction engineering according to claim 4, characterized in that: A No. 4 spring is provided between the measuring slide plate (183) and the measuring plate (4), a No. 5 spring is provided between the L-shaped frame (6) and the L-shaped rod (184), and a No. 6 spring is provided between the L-shaped frame (6) and the sliding rod (186).

6. A flatness detection device for construction engineering according to claim 5, characterized in that: The limiting device comprises a sliding seat (191), a rotating plate (192), a limiting block (193), a short plate (194) and an elastic telescopic plate (195); the sliding seat (191) is slidably mounted on the surface of the measuring plate (4); the rotating plate (192) is rotatably mounted on the surface of the sliding seat (191); the limiting block (193) is fixedly mounted on the circumferential surface of the rotating plate (192); the short plate (194) is fixedly mounted on the top of the sliding seat (191); and the elastic telescopic plate (195) is fixedly mounted on the surface of the measuring plate (4).

7. A flatness detection device for construction engineering according to claim 6, characterized in that: An L-shaped long plate (196) is fixedly mounted on the free end of the elastic expansion plate (195), a trapezoidal block (197) is fixedly mounted on a side of the L-shaped long plate (196) away from the elastic expansion plate (195), and a baffle (198) is fixedly mounted on the surface of the measuring slide plate (183).

8. A flatness detection device for construction engineering according to claim 7, characterized in that: A No. 7 spring is provided between the sliding seat (191) and the measuring plate (4), and a No. 3 torsion spring is provided between the rotating plate (192) and the sliding seat (191).

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