Fabricated building construction measuring device

Abstract

This invention relates to the field of construction surveying technology, and more specifically, to a construction surveying device for prefabricated buildings. The device includes a fixing component for securing the device to a precast column; a positioning component for locating the precast column and precast pit positions is mounted on the fixing component; a coarse measuring component for measuring the coarse angle of the precast column is provided on one side of the positioning component, and an adjusting component for adjusting the angle is provided between the coarse measuring component and the fixing component; the coarse measuring component includes an installation component and a fine measuring component for measuring the fine angle of the precast column; a pressure-reducing component is provided on the coarse measuring component; and a marking component is provided on the coarse measuring component. This invention designs the coarse measuring component for rapid "alignment," while the fine measuring component provides stable and precise angle readings, with the two mutually verifying each other and reducing misjudgments.

Description

Technical Field

[0001] This invention relates to the field of construction surveying technology, and more specifically, to a construction surveying device for prefabricated buildings. Background Technology

[0002] In the hoisting and alignment process of prefabricated buildings, it is necessary to quickly obtain the verticality and deviation direction from the side of the components (such as precast columns).

[0003] Traditional methods either use total stations or theodolites, but these methods involve time-consuming setup and orientation, as well as high operator skill. Alternatively, measurements can be taken using bubble levels or plumb lines, but these methods suffer from poor resistance to disturbances and limited reading resolution. Furthermore, factors such as vibrations, wind loads, irregular installation surfaces, and oil and dust at the construction site make it difficult to simultaneously achieve "rapid and stable readings, easy clamping, and interference resistance."

[0004] Therefore, we propose a prefabricated building construction measurement device to solve the above problems. Summary of the Invention

[0005] In order to overcome the above-mentioned defects of the prior art, embodiments of the present invention provide a prefabricated building construction measurement device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a prefabricated building construction measurement device, comprising a fixing member for fixing the device to a precast column; a positioning member for positioning the precast column and the precast pit is installed on the fixing member; a coarse measuring member for measuring the coarse angle of the precast column is provided on one side of the positioning member, and an adjusting member for adjusting the angle is provided between the coarse measuring member and the fixing member; the coarse measuring member includes an installation member and a fine measuring member for measuring the fine angle of the precast column; a pressure reducing member for reducing pressure is provided on the coarse measuring member; and a marking member is provided on the coarse measuring member.

[0007] In a preferred embodiment, the fixing member includes a fixing plate, which is placed vertically. A strong magnetic block is installed on the inner side wall of the fixing plate. A rotating rod is rotatably connected to the fixing plate. A magnetic shielding pad is fixedly connected to the side wall of the rotating rod. A pull plate is fixedly connected to one end of the magnetic shielding pad. A strip-shaped opening is provided on the side wall of the fixing plate. A connecting block connected to the pull plate is provided in the strip-shaped opening. A pull block that fits against the side wall of the fixing plate is fixedly connected to the side wall of the connecting block. A rubber pad is fixedly connected to the side wall of the fixing plate. Two symmetrical locking rings are fixedly connected to the side wall of the fixing plate.

[0008] In a preferred embodiment, the positioning element includes a mounting base fixedly connected to the side wall of a fixed plate. A first positioning strip is fixedly connected to the side wall of the fixed plate. Multiple telescopic rods are fixedly connected to the mounting base. Multiple limiting strips are fixedly connected to the side walls of the multiple telescopic rods. A positioning plate is fixedly connected to the lower end of the multiple telescopic rods. A second positioning strip matching the first positioning strip is fixedly connected to the upper end face of the positioning plate. A socket is fixedly connected to the upper end face of the positioning plate, and a rubber ring is fixedly connected to the inner side wall of the socket. A cross opening is provided on the side wall of the positioning plate, and a matching cross laser is inserted into the socket.

[0009] In a preferred embodiment, the adjusting member includes a connecting seat fixedly connected to the side wall of the fixing plate, a ball seat fixedly connected to the side wall of the connecting seat, a matching ball head in the ball seat, two symmetrical openings on the side wall of the ball seat, a fixing screw for fixing the ball head threadedly connected to the side wall of the ball seat, a first connecting post fixedly connected to the side wall of the ball head, a positioning ball fixedly connected to the side wall of the ball head, and a positioning rod matching the positioning ball fixedly connected to the side wall of the ball seat.

[0010] In a preferred embodiment, the coarse measuring component includes a measuring box fixedly connected to one end of a first connecting post. A first cavity is provided on the side wall of the measuring box. An insert block is inserted into the measuring box. A connecting rope extending into the first cavity is fixedly connected to the lower end of the insert block. A first pendulum is fixedly connected to the side wall of the connecting rope. A first protective glass is provided on the side wall of the measuring box, located on the side of the first pendulum. A first measuring sticker is affixed to the first protective glass.

[0011] In a preferred embodiment, the mounting component includes a second cavity disposed in the measuring box, the second cavity being filled with damping silicone oil, a threaded socket being threadedly connected to the measuring box, a second connecting post being fixedly connected to the lower end of the threaded socket, an end cap being fixedly connected to the lower end of the second connecting post, and a jewel bearing being fixedly connected to the lower end face of the end cap.

[0012] In a preferred embodiment, the fine measuring component includes a measuring rod disposed in a jewel bearing, the top of the measuring rod being a pointed tip, the lower end of the measuring rod being threadedly connected to a threaded mounting head, the lower end of the threaded mounting head being fixedly connected to a second pendulum, the second pendulum having a magnetic block, and the second pendulum having a counterweight matching the magnetic block.

[0013] In a preferred embodiment, the pressure-reducing component includes two symmetrical third cavities disposed in the measuring box. The two third cavities are respectively connected to the second cavity. A flexible diaphragm is provided at the connection between the two third cavities and the second cavity. A pipe is provided through the side wall of the third cavity, and a breathable membrane is provided at the output end of the two pipes.

[0014] In a preferred embodiment, the labeling element includes a second protective glass disposed on the side wall of the measuring box and located on the side of the second pendulum; a scale sticker arranged in a circular array on the side wall of the measuring box on the side wall of the second protective glass; two symmetrical T-shaped observation windows on the side wall of the measuring box; quantitative stickers adhered to the side of the T-shaped observation windows on the side wall of the measuring box; a third protective glass disposed on the side wall of the measuring box and located on the side of the measuring rod; a second measuring sticker affixed to the side wall of the third protective glass; and two symmetrical rubber plugs inserted into the side wall of the second cavity.

[0015] The technical effects and advantages of this invention are as follows: 1. This invention designs a combination of strong magnetic block + magnetic isolation pad + demagnetizing pull plate; it can reliably attract and reduce residual magnetic attraction force during release by the magnetic isolation pad, thereby improving loading / unloading efficiency and safety. In conjunction with rubber pad and locking ring, it reduces the risk of in-plane slippage and accidental detachment.

[0016] 2. The present invention designs a universal fine-tuning mechanism consisting of a ball seat, a ball head, and a fixing screw, which can eliminate unevenness of the mounting surface and posture error with a small stroke after adsorption.

[0017] 3. The present invention is designed with a coarse measuring component for quick "alignment" and a fine measuring component to provide a stable and precise angle reading. The two components corroborate each other and reduce misjudgment.

[0018] 4. The invention is designed with the second cavity filled with damping silicone oil, which makes point contact with the jewel support, so that the pendulum converges within a few seconds and the reading does not trail off.

[0019] 5. The present invention adopts a pressure reduction channel consisting of a third chamber, a flexible diaphragm, and a breathable membrane, which buffers the changes in chamber pressure caused by temperature / height difference, reduces the impact of oil level fluctuations on readings, and improves repeatability and durability. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a first-view structural diagram of the present invention; Figure 3 This is a schematic diagram of the second perspective structure of the present invention; Figure 4 This is a schematic diagram of the connection structure of the fastener in this invention; Figure 5 This is a schematic diagram of a partial connection structure of the fastener in this invention; Figure 6 This is a schematic diagram of the connection structure between the positioning component and the fixing component in this invention; Figure 7 This is a schematic diagram of a partial connection structure of the positioning element in this invention; Figure 8This is a schematic diagram of the connection structure of the positioning component, fixing component, and adjusting component in this invention; Figure 9 This is a schematic diagram of a partial connection structure of the adjusting component in this invention; Figure 10 This is a schematic diagram of the connection structure of the coarse measuring component, mounting component, pressure reducing component, and marking component in this invention; Figure 11 for Figure 10 A side view diagram of the connection structure; Figure 12 for Figure 10 A schematic diagram of the first partial cross-sectional view of the connection structure; Figure 13 for Figure 10 A schematic diagram of the second partial sectional view of the connection structure; Figure 14 for Figure 13 A magnified schematic diagram of the connection structure at point A in the middle.

[0021] The attached figures are labeled as follows: 1. Fixing component, 11. Fixing plate, 12. Strong magnetic block, 13. Rotating rod, 14. Magnetic shielding pad, 15. Pull plate, 16. Strip opening, 17. Connecting block, 18. Pull block, 19. Rubber pad, 110. Locking ring; 2. Positioning component, 21. Mounting base, 22. First positioning strip, 23. Multi-section telescopic rod, 24. Limiting strip, 25. Positioning plate, 26. Second positioning strip, 27. Socket, 28. Cross opening, 29. Cross laser; 3 Adjusting component, 31 Connecting seat, 32 Ball seat, 33 Ball head, 34 Opening, 35 Fixing screw, 36 First connecting post, 37 Positioning ball, 38 Positioning rod; 4. Coarse measuring component; 41. Measuring box; 42. First cavity; 43. Insert block; 44. Connecting rope; 45. First pendulum; 46. First protective glass; 47. First measuring sticker. 5. Mounting component; 51. Second cavity; 52. Threaded socket; 53. Second connecting post; 54. End cap; 55. Jewel bearing; 56. Fine measuring component; 561 Measuring rod, 562 Tipped head, 563 Threaded mounting head, 564 Second pendulum, 565 Magnetic block, 567 Counterweight; 6 Pressure-reducing component, 61 Third cavity, 62 Flexible diaphragm, 63 Pipe, 64 Breathable membrane; 7. Labeling parts, 71. Second protective glass, 72. Scale sticker, 73. T-type observation window, 74. Quantitative sticker, 75. Third protective glass, 76. Second measurement sticker, 77. Rubber stopper. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 A prefabricated building construction measurement device includes a fixing component 1, which includes a fixing plate 11. The fixing plate 11 is placed vertically, and a strong magnetic block 12 is installed on the inner side wall of the fixing plate 11. The strong magnetic block 12 is neodymium iron boron. It is worth noting that in the process of prefabricated building construction, it is generally used to assemble with precast concrete columns, which can greatly reduce construction time and further improve construction efficiency. The precast concrete columns contain steel bars to ensure the strength of the concrete columns. With the assistance of the strong magnetic block 12, the fixing plate 11 can be fixed to the concrete column. A rotating rod 13 is rotatably connected in the fixing plate 11, and a magnetic shielding pad 14 is fixedly connected to the side wall of the rotating rod 13. The magnetic shielding pad 14 is made of amorphous Metglas 2714A. Amorphous Metglas 2714A is a cobalt-based amorphous alloy with high magnetic permeability, low coercivity and low loss characteristics, and is suitable for high-frequency electromagnetic environments. Its soft magnetic properties are superior to those of traditional crystalline materials, which can effectively reduce magnetic oscillation leakage fields. As a passive shell material used in high-performance magnetic shielding devices, it can significantly reduce residual DC fields. More importantly, a coil spring connected to the fixed plate 11 is connected to the rotating rod 13, and the magnetic shielding pad 14 can be wound around the rotating rod 13. With the assistance of the coil spring, the magnetic shielding pad 14 can be wound around the rotating rod 13. One end of the magnetic shielding pad 14 is fixedly connected to a pull plate 15. The side wall of the fixed plate 11 is provided with a strip opening 16. A connecting block 17 connected to the pull plate 15 is provided in the strip opening 16. A pull block 18 that fits against the side wall of the fixed plate 11 is fixedly connected to the side wall of the connecting block 17. A rubber pad 19 is fixedly connected to the side wall of the fixed plate 11. Two symmetrical locking rings 110 are fixedly connected to the side wall of the fixed plate 11.

[0024] More specifically, when workers need to fix the entire device, they can first place the fixing plate 11 in a suitable position according to the height of the precast concrete column. Then, with the assistance of the strong magnet 12, the fixing plate 11 can be fixed to the precast concrete column at a suitable height. Simultaneously, workers can loop ropes around the locking ring 110 according to the shape of the precast concrete column and then use the ropes to fix the fixing plate 11 to the precast concrete column. The device offers multiple fixing methods, allowing it to adapt to different precast concrete columns, further facilitating the workers' initial preparation work. Then, when workers need to remove the fixing plate 11... When the device is in use, the operator can first pull the pull block 18. When the operator pulls the pull block 18, the pull block 18 moves downward, which causes the connecting block 17 to move downward, thereby causing the pull plate 15 to move downward. This allows the magnetic shielding pad 14 to unfold and be positioned between the strong magnetic block 12 and the precast cement column. This reduces the magnetic force of the strong magnetic block 12 on the precast cement column, allowing the operator to remove the device. When the operator releases the pull block 18, the magnetic shielding pad 14 can be rewound onto the rotating rod 13 with the assistance of the coil spring, making it convenient for the operator to use the device.

[0025] Reference Figure 1 , Figure 2 , Figure 3 , Figure 6 and Figure 7The positioning component 2 includes a mounting base 21 fixedly connected to the side wall of the fixing plate 11. A first positioning strip 22 is fixedly connected to the side wall of the fixing plate 11. Multiple telescopic rods 23 are fixedly connected to the mounting base 21. Multiple limiting strips 24 are fixedly connected to the side wall of the multiple telescopic rods 23. More specifically, the multiple telescopic rods 23 are composed of a post and multiple rods. The inner side wall of the post is provided with multiple limiting grooves, and the outer side wall of one of the rods is fixedly connected with a limiting strip 24 that matches the limiting groove. Multiple limiting grooves are provided on the inner wall of one insertion rod, while a limiting strip 24 is fixedly connected to the outer wall of another insertion rod. The limiting strip on the other insertion rod is located in the limiting groove of one of the insertion rods. It is worth noting that the other insertion rods have a similar structure, which will not be described in detail here. This can prevent the multi-section telescopic rod 23 from rotating, thereby achieving better positioning. Furthermore, the vertical direction of the multiple limiting strips 24 is horizontally aligned with the vertical direction of the first positioning strip 22, and both are on the same horizontal plane. The limiting grooves and limiting strips... The specific connection relationship of 24 is as follows: two symmetrical sliding grooves are provided on the side wall of the limiting groove, and a slider connected to the limiting strip 24 is provided in the sliding groove. With the assistance of the slider and the sliding groove, the limiting strip 24 can be effectively prevented from disengaging from the limiting groove, further ensuring the normal use of the device. The lower end of the multi-section telescopic rod 23 is fixedly connected to a positioning plate 25, and the upper end face of the positioning plate 25 is fixedly connected to a second positioning strip 26 that matches the first positioning strip 22. The upper end face of the positioning plate 25 is fixedly connected to a socket 27, and the socket 27... A rubber ring is fixedly connected to the inner side wall of 7. A cross opening 28 is provided on the side wall of the positioning plate 25. It is worth noting that the cross opening 28 is composed of a circular opening and multiple rectangular openings. The circular opening is in the middle position, while the multiple rectangular openings are located on the side wall of the circular opening and are connected to it. The circular opening facilitates the normal use of the cross laser 29. The socket 27 is equipped with a matching cross laser 29. Therefore, the circular opening mentioned above can ensure the normal use of the cross laser 29.

[0026] A more specific connection is that workers can draw corresponding positioning lines on one side of the precast pit based on the data on the engineering drawings. When placing the precast column into the pit, especially when the column is lifted and placed using hoisting equipment, workers can draw positioning lines on the column beforehand and then fix the device to it. During this process, it is crucial to ensure that the first positioning strip 22 aligns with the positioning line on the precast column. Then, when placing the column, workers can pull down the multi-section telescopic rod 23. With the assistance of the limiting strip 24, the second positioning strip 26, and the cross laser 29, workers can quickly align the positioning line on the precast column with the positioning line on one side of the precast pit, thus quickly positioning the precast column within the pit. The positioning plate 25 is positioned in the middle, which facilitates the positioning work of the staff. It is particularly noteworthy that when the multi-section telescopic rod 23 is pulled down, the positioning plate 25 moves down accordingly. This allows the staff to move the second positioning strip 26 on the positioning plate 25 to position the precast column and the precast pit. However, when the positioning plate 25 is in the middle position and cannot fit against the surface of the precast pit, the staff can insert the cross laser 29 into the socket 27. It is particularly noteworthy that the cross laser 29 is a laser, but the laser can emit a cross laser, which further facilitates the staff's use of the device. Then, the cross laser 29 is turned on, so that the cross laser 29 can emit a laser, which facilitates the staff's positioning of the precast column and the precast pit, further facilitating the staff's positioning work.

[0027] Reference Figure 1 , Figure 2 , Figure 3 , Figure 8 and Figure 9 The adjusting component 3 includes a connecting seat 31 fixedly connected to the side wall of the fixing plate 11. A ball seat 32 is fixedly connected to the side wall of the connecting seat 31. The ball seat 32 is provided with a matching ball head 33. The side wall of the ball seat 32 is provided with two symmetrical openings 34. A fixing screw 35 for fixing the ball head 33 is threadedly connected to the side wall of the ball seat 32. A first connecting post 36 is fixedly connected to the side wall of the ball head 33. A positioning ball 37 is fixedly connected to the side wall of the ball head 33. A positioning rod 38 that matches the positioning ball 37 is fixedly connected to the side wall of the ball seat 32.

[0028] More specifically, after the device is fixed to the precast concrete column, the ball head 33 can deflect autonomously under the gravity of the positioning ball 37. It is particularly noteworthy that the opening 34 at the lower end of the ball seat 32 extends to one side of the positioning ball 37, allowing the ball seat 32 to limit the positioning ball 37 to a certain extent. Simultaneously, the operator can determine whether the positioning ball 37 is vertical based on the positions of the positioning rod 38 and the positioning ball 37. It is also important to note that the purpose of the adjusting component 3 is to prevent insufficient verticality of the device due to assembly issues. The adjusting component 3 allows operators to quickly and easily adjust the verticality of the device according to actual conditions, further facilitating its use and improving measurement accuracy. Operators can rotate the fixing screw 35, which, with the assistance of the nut, moves to contact the ball head 33, thus positioning it and further facilitating positioning work, indirectly improving work efficiency. The recommended specifications for the ball seat 32 and ball head 33 are: ball diameter Ø18–25 mm; allowable adjustment angle ±10-15°; ball seat 32 sidewall opening 34 + fixing screw 35 for positioning; ball head 33 sidewall with first connecting post 36 and positioning ball 37; ball seat 32 sidewall with positioning rod 38 for verticality determination; the recommended specification for the fixing screw 35 is 0.8 N·m–1.5 N·m, with sufficient static friction after tightening to resist on-site disturbances.

[0029] Reference Figure 10 , Figure 11 and Figure 12 The coarse measuring component 4 includes a measuring box 41 fixedly connected to one end of the first connecting post 36. A first cavity 42 is provided on the side wall of the measuring box 41. An insert block 43 is inserted into the measuring box 41. A connecting rope 44 extending into the first cavity 42 is fixedly connected to the lower end of the insert block 43. A first pendulum 45 is fixedly connected to the side wall of the connecting rope 44. A first protective glass 46 located on one side of the first pendulum 45 is provided on the side wall of the measuring box 41. A first measuring sticker 47 is affixed to the first protective glass 46.

[0030] More specifically, when the angle of the measuring box 41 shifts, the first pendulum 45 will continue to move vertically downwards under the influence of gravity. This creates an angular difference between the first pendulum 45 and the first measuring sticker 47, allowing the operator to promptly detect the shift in the measuring box 41. The operator can then adjust the measuring box 41. More specifically, when adjusting the measuring box 41, the first connecting column 36 will cause the ball head 33 to move within the ball seat 32, ensuring that the first pendulum 45 and the first measuring sticker 47 are aligned with the horizontal line. This guarantees that the measuring box 41 is in the correct position, further ensuring the normal operation of the device. The recommended specifications for the first pendulum 45 are: 20g–40g, with an effective pendulum length of 40–60mm.

[0031] Reference Figure 13 and Figure 14 The mounting component 5 includes a second cavity 51 disposed in the measuring box 41, the second cavity 51 being filled with damping silicone oil, a threaded socket 52 being threadedly connected to the measuring box 41, a second connecting post 53 being fixedly connected to the lower end of the threaded socket 52, an end cap 54 being fixedly connected to the lower end of the second connecting post 53, a jewel bearing 55 being fixedly connected to the lower end face of the end cap 54, and a matching fine measuring component 56 being disposed in the jewel bearing 55.

[0032] Reference Figure 13 and Figure 14 The fine measuring component 56 includes a measuring rod 561 disposed in the jewel bearing 55. The top end of the measuring rod 561 is a pointed head 562. The lower end of the measuring rod 561 is threadedly connected to a threaded mounting head 563. The lower end of the threaded mounting head 563 is fixedly connected to a second pendulum 564. The second pendulum 564 is provided with a magnetic block 565. The second pendulum 564 is provided with a counterweight 567 that matches the magnetic block 565.

[0033] More specifically, the connection relationship is as follows: Initial state (vertical): When the measuring box 41 is completely vertical, the center of gravity of the second pendulum 564 is exactly below the measuring rod 561, and the measuring rod 561 points to 0° on the scale sticker 72 on the side of the second protective glass 71. Tilt state: When the measuring box 41 tilts with the precast column, the measuring box 41, the internal jewel bearing 55, the second protective glass 71, and the scale sticker 72 will tilt together. Pendulum response: Due to gravity, the second pendulum 564 (center of gravity) tends to maintain a vertical orientation. At this time, the measuring rod 561 will roll slightly in the recess of the end cap 54, causing the pendulum to deflect relative to the housing. The pointer indicates that the measuring rod 561, which is rigidly connected to the second pendulum 564, deflects accordingly, indicating the tilt angle on the second protective glass 71 and the scale sticker 72. Damping stability: Under the resistance of the damping silicone oil, the second pendulum 564 will stop quickly and smoothly at the new equilibrium position instead of oscillating back and forth. The damping silicone oil is 350cSt-1000cSt, ensuring stability within 1.5–3 seconds. The oil filling hole is sealed with a rubber plug for easy oil replenishment.

[0034] Reference Figure 11 , Figure 12 and Figure 13 The pressure reducing component 6 includes two symmetrical third cavities 61 disposed in the measuring box 41. The two third cavities 61 are respectively connected to the second cavity 51. A flexible diaphragm 62 is provided at the connection between the two third cavities 61 and the second cavity 51. A pipe 63 is provided through the side wall of the third cavity 61. A breathable membrane 64 is provided at the output end of the two pipes 63.

[0035] More specifically, when the temperature rises, the damping silicone oil expands, squeezing the flexible diaphragm 62. The flexible diaphragm 62 compresses the air in the third chamber 61, and the air is slowly discharged through the breathable membrane 64, maintaining internal and external pressure balance. When the temperature drops, the damping silicone oil contracts, and external air enters through the breathable membrane 64. The flexible diaphragm 62 rebounds, compensating for the negative pressure. This structure almost completely eliminates internal pressure fluctuations caused by temperature changes, greatly improving the product's environmental adaptability and long-term stability. It is particularly noteworthy that the breathable membrane 64 is an ePTFE membrane, preventing liquid leakage / air intrusion: the ePTFE membrane only allows gas to pass through, effectively preventing external moisture, dust, and corrosive gases from entering the interior of the shell, protecting the damping silicone oil and precision mechanical structure. In the harsh environment of the construction site with large temperature differences between day and night, this design directly targets the core interference factor of ambient temperature, achieving active protection through a passive mechanical structure, which is key to ensuring that the instrument maintains high accuracy throughout its entire life cycle.

[0036] Reference Figure 11 , Figure 12 and Figure 13The labeling component 7 includes a second protective glass 71 disposed on the side wall of the measuring box 41 and located on the side of the second pendulum 564. The side wall of the measuring box 41 is provided with scale stickers 72 arranged in a ring array on the side of the second protective glass 71. The side wall of the measuring box 41 is provided with two symmetrical T-shaped observation windows 73. The side wall of the measuring box 41 is provided with quantitative stickers 74 adhered on the side of the T-shaped observation windows 73. The side wall of the measuring box 41 is provided with a third protective glass 75 located on the side of the measuring rod 561. The side wall of the third protective glass 75 is affixed with a second measurement sticker 76. The side wall of the second cavity 51 is provided with two symmetrical rubber plugs 77.

[0037] Of particular note is the second protective glass 71, which is circular with an outer ring of graduated stickers (angle / mm / m), forming a clear angular difference with the measuring rod. A T-shaped observation window and a quantitative sticker are provided to observe the liquid level, while the graduated sticker 72 displays the angle. This allows for clear understanding of the angular deviation between the measuring rod 561 and the graduated sticker 72, facilitating adjustments by the operator. The T-shaped observation window 73 and the quantitative sticker 74 also allow for easy observation of the damping silicone oil content in the second chamber 51. Furthermore, the operator can remove the rubber stopper 77 and inject damping silicone oil to ensure proper device operation. The third protective glass 75 allows the operator to easily observe whether the measuring rod 561 and the second measuring sticker 76 are on the same horizontal line, further facilitating a quick assessment of the verticality of the precast concrete column, thus simplifying the operator's work and indirectly improving efficiency.

[0038] Working principle: When the staff needs to use this device, the staff can first fix the two devices to two adjacent side walls of the precast cement column. The more specific fixing method is as follows: First, the staff can place the fixing plate 11 in a suitable position according to the height of the precast cement column. Then, with the assistance of the strong magnetic block 12, the fixing plate 11 can be fixed at a suitable height on the precast cement column.

[0039] After the device is fixed, the ball head 33 will deflect autonomously under the gravity of the positioning ball 37. It is particularly noteworthy that the opening 34 at the lower end of the ball seat 32 extends to one side of the positioning ball 37, allowing the ball seat 32 to limit the positioning ball 37. Simultaneously, the operator can determine whether the positioning ball 37 is vertical based on the positions of the positioning rod 38 and the positioning ball 37. It is also important to note that the purpose of the adjusting component 3 is to prevent insufficient verticality of the device due to assembly. The adjusting component 3 allows the operator to quickly adjust the verticality of the device according to the actual situation, further facilitating its use and improving the measurement accuracy. Furthermore, the operator can rotate the fixing screw 35, which, with the assistance of the nut, can move accordingly. The ball head 33 can be contacted by the 35, which allows the ball head 33 to be positioned, further facilitating the positioning work of the staff and indirectly improving the work efficiency of the staff. At the same time, when the angle of the measuring box 41 is offset, the first pendulum 45 will always be vertically downward under the action of gravity. This will create an angle difference between the first pendulum 45 and the first measuring sticker 47, so that the staff can detect the offset of the measuring box 41 in time. When the staff adjusts the measuring box 41, the first connecting column 36 will drive the ball head 33 to move in the ball seat 32, so that the first pendulum 45 and the first measuring sticker 47 are on the horizontal line, thus ensuring that the measuring box 41 is in the right position. Then the staff can turn the fixing screw 35, which can limit the ball head 33 and further limit the measuring box 41.

[0040] Once the device is positioned and fixed, the precast concrete column is suspended in mid-air by the hoisting equipment. Therefore, two workers can move the column at any time. More specifically, workers can pre-draw corresponding positioning lines on one side of the precast pit based on the data in the engineering drawings. During this process, it is ensured that the first positioning strip 22 is aligned with the positioning line on the precast column. When placing the precast column, workers can pull down the multi-section telescopic rod 23. With the assistance of the limiting strip 24, the second positioning strip 26, and the cross laser 29, workers can quickly align the positioning line on the precast column with the positioning line on one side of the precast pit. This allows the precast column to quickly be positioned in the center of the precast pit, facilitating the workers' positioning. In the positioning work, it is particularly important to note that when the multi-section telescopic rod 23 is pulled downwards, the positioning plate 25 moves downwards accordingly. This allows the operator to move the second positioning strip 26 on the positioning plate 25 to position the precast column and the precast pit. However, when the positioning plate 25 is in the middle position and cannot fit against the surface of the precast pit, the operator can insert the cross laser 29 into the socket 27. It is important to note that the cross laser 29 is a laser, but it can emit a cross laser beam, further facilitating the operator's use of the device. Then, the cross laser 29 is turned on, so that the cross laser 29 can emit a laser beam, thus facilitating the operator's positioning of the precast column and the precast pit, further facilitating the operator's positioning work.

[0041] After the precast column is positioned, workers can adjust its angle based on the position of the second pendulum 564 in the two measuring boxes 41 to further ensure its verticality. If the verticality of the second pendulum 564 in one measuring box 41 is incorrect, workers can first adjust the verticality of one side of the precast column. After adjustment, workers can then adjust the verticality of the other side. Alternatively, two workers can work together to adjust simultaneously. This method can be modified according to the workers' work habits. A more specific method is as follows: When the measuring box 41 tilts with the precast column, the measuring box 41 and its internal components, such as the jewel bearing 55, the second protective glass 71, and the scale sticker 72, will tilt together. Pendulum response: Due to gravity, the second pendulum 564 (center of gravity) tends to maintain a vertical orientation. At this time, the measuring rod 561 will roll slightly in the recess of the end cap 54, causing the pendulum to deflect relative to the housing. The pointer indicates that the measuring rod 561, which is rigidly connected to the second pendulum 564, deflects accordingly, indicating the tilt angle on the second protective glass 71 and the scale sticker 72. Damping stability: Under the resistance of the damping silicone oil, the second pendulum 564 will stop quickly and smoothly at the new equilibrium position instead of oscillating back and forth. When the measuring box 41 is completely vertical, the center of gravity of the second pendulum 564 is exactly below the measuring rod 561, and the measuring rod 561 points to 0° on the scale sticker 72 on the side of the second protective glass 71.

[0042] During the use of the device, when the temperature rises, the damping silicone oil expands and squeezes the flexible diaphragm 62. The flexible diaphragm 62 compresses the air in the third chamber 61, and the air is slowly discharged through the breathable membrane 64 to maintain the internal and external pressure balance. When the temperature drops, the damping silicone oil contracts, and external air enters through the breathable membrane 64. The flexible diaphragm 62 rebounds to compensate for the negative pressure. This structure almost completely eliminates the internal pressure fluctuation of the shell caused by temperature changes, which greatly improves the environmental adaptability and long-term stability of the product.

[0043] Factory verification: Zero-point calibration: Adsorption on the standard vertical surface → Universal fine adjustment until the positioning ball / rod coincides → Fine measurement pointer is set to "0", and the amount of counterweight fine adjustment is recorded.

[0044] Linearity: ±0.5°, ±1.0° standard tilt table check, allowable error ≤ ±0.05° (≈ ±0.87 mm / m).

[0045] Repeatability: After 5 clamping and disassembly cycles at the same workstation, the standard deviation is ≤ ±0.02°.

[0046] Damping time: 1.5s–3s after a 10° step disturbance.

[0047] Magnetic-type rapid dual-display verticality calibrator—purely mechanical improvement design and production documentation.

[0048] Sealing / Leakage: No leakage after 24 hours at room temperature; no leakage after aging at 50℃ for 2 hours.

[0049] Magnetic safety: It can withstand horizontal shearing of 50 N on a smooth steel plate without slippage; the demagnetizing pull plate can be safely released at 80 N.

[0050] On-site self-calibration: Adhesive to the cylindrical surface → UNLOCK / unlock the universal base → observe the trend of the positioning ball / rod and the coarse measurement pendulum, and adjust it to coincide; LOCK / Lock the universal base → Fine measurement reading points to "0"; The two devices respectively verify the X / Y directions on two adjacent surfaces; If the stabilization time is >3 seconds or there is significant overshoot, add oil / replace with higher viscosity silicone oil or fine-tune the weight.

[0051] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change. Secondly: The accompanying drawings of the embodiments disclosed in this invention only involve the structures involved in the embodiments disclosed in this invention. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this invention can be combined with each other. In conclusion, the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A prefabricated building construction surveying device, characterized in that; Includes a fastener (1) for fixing the device to a precast column; The fixing member (1) is equipped with a positioning member (2) for positioning the precast column and the precast pit. The positioning component (2) is provided with a coarse measuring component (4) for measuring the coarse angle of the precast column on one side, and an adjusting component (3) for adjusting the angle is provided between the coarse measuring component (4) and the fixing component (1). The coarse measuring component (4) is provided with an installation component (5) and a fine measuring component (56) for measuring the fine angle of the precast column. The coarse measuring component (4) is provided with a pressure reducing component (6) for pressure reduction. The coarse measuring piece (4) is provided with a marking piece (7).

2. The prefabricated building construction surveying device according to claim 1, characterized in that: The fixing component (1) includes a fixing plate (11), which is placed vertically. A strong magnetic block (12) is installed on the inner side wall of the fixing plate (11). A rotating rod (13) is rotatably connected in the fixing plate (11). A magnetic shielding pad (14) is fixedly connected to the side wall of the rotating rod (13). A pull plate (15) is fixedly connected to one end of the magnetic shielding pad (14). A strip-shaped opening (16) is provided on the side wall of the fixing plate (11). A connecting block (17) connected to the pull plate (15) is provided in the strip-shaped opening (16). A pull block (18) that fits against the side wall of the fixing plate (11) is fixedly connected to the side wall of the connecting block (17). A rubber pad (19) is fixedly connected to the side wall of the fixing plate (11). Two symmetrical locking rings (110) are fixedly connected to the side wall of the fixing plate (11).

3. The prefabricated building construction surveying device according to claim 2, characterized in that: The positioning component (2) includes a mounting base (21) fixedly connected to the side wall of the fixing plate (11). A first positioning strip (22) is fixedly connected to the side wall of the fixing plate (11). Multiple telescopic rods (23) are fixedly connected to the mounting base (21). Multiple limiting strips (24) are fixedly connected to the side wall of the multiple telescopic rods (23). A positioning plate (25) is fixedly connected to the lower end of the multiple telescopic rods (23). A second positioning strip (26) matching the first positioning strip (22) is fixedly connected to the upper end face of the positioning plate (25). A socket (27) is fixedly connected to the upper end face of the positioning plate (25). A rubber ring is fixedly connected to the inner side wall of the socket (27). A cross opening (28) is provided on the side wall of the positioning plate (25). A cross laser (29) matching the socket (27) is inserted into the socket (27).

4. The prefabricated building construction surveying device according to claim 3, characterized in that: The adjusting component (3) includes a connecting seat (31) fixedly connected to the side wall of the fixing plate (11), a ball seat (32) fixedly connected to the side wall of the connecting seat (31), a matching ball head (33) in the ball seat (32), two symmetrical openings (34) on the side wall of the ball seat (32), a fixing screw (35) for fixing the ball head (33) threadedly connected to the side wall of the ball seat (32), a first connecting post (36) fixedly connected to the side wall of the ball head (33), a positioning ball (37) fixedly connected to the side wall of the ball head (33), and a positioning rod (38) matching the positioning ball (37) fixedly connected to the side wall of the ball seat (32).

5. The prefabricated building construction surveying device according to claim 4, characterized in that: The coarse measuring component (4) includes a measuring box (41) fixedly connected to one end of the first connecting post (36). A first cavity (42) is provided on the side wall of the measuring box (41). An insert (43) is inserted into the measuring box (41). A connecting rope (44) extending into the first cavity (42) is fixedly connected to the lower end of the insert (43). A first pendulum (45) is fixedly connected to the side wall of the connecting rope (44). A first protective glass (46) is provided on the side wall of the measuring box (41) on the side of the first pendulum (45). A first measuring sticker (47) is attached to the first protective glass (46).

6. The prefabricated building construction surveying device according to claim 5, characterized in that: The mounting component (5) includes a second cavity (51) disposed in the measuring box (41), the second cavity (51) being filled with damping silicone oil, a threaded socket (52) being threadedly connected to the measuring box (41), a second connecting post (53) being fixedly connected to the lower end of the threaded socket (52), an end cap (54) being fixedly connected to the lower end of the second connecting post (53), and a jewel bearing (55) being fixedly connected to the lower end face of the end cap (54).

7. The prefabricated building construction surveying device according to claim 6, characterized in that: The fine measuring component (56) includes a measuring rod (561) disposed in a jewel bearing (55). The top end of the measuring rod (561) is a pointed head (562). The lower end of the measuring rod (561) is threadedly connected to a threaded mounting head (563). The lower end of the threaded mounting head (563) is fixedly connected to a second pendulum (564). The second pendulum (564) is provided with a magnetic block (565). The second pendulum (564) is provided with a counterweight (567) that matches the magnetic block (565).

8. The prefabricated building construction surveying device according to claim 7, characterized in that: The pressure reducing component (6) includes two symmetrical third cavities (61) disposed in the measuring box (41). The two third cavities (61) are respectively connected to the second cavity (51). A flexible diaphragm (62) is provided at the connection between the two third cavities (61) and the second cavity (51). A pipe (63) is provided through the side wall of the third cavity (61). A breathable membrane (64) is provided at the output end of the two pipes (63).

9. A prefabricated building construction surveying device according to claim 8, characterized in that: The labeling component (7) includes a second protective glass (71) disposed on the side wall of the measuring box (41) and on the side of the second pendulum (564). The side wall of the measuring box (41) is provided with scale stickers (72) arranged in a ring array on the side of the second protective glass (71). The side wall of the measuring box (41) is provided with two symmetrical T-shaped observation windows (73). The side wall of the measuring box (41) is provided with quantitative stickers (74) adhered on the side of the T-shaped observation windows (73). The side wall of the measuring box (41) is provided with a third protective glass (75) on the side of the measuring rod (561). The side wall of the third protective glass (75) is pasted with a second measurement sticker (76). The side wall of the second cavity (51) is provided with two symmetrical rubber plugs (77).

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