A verticality calibration device for prefabricated building steel structure installation

Abstract

This invention discloses a verticality calibration device for the installation of prefabricated steel structures, comprising a main body positioned close to the inspection surface of the steel structure, and two sets of guide components disposed on opposite sides of the main body. Each set of guide components includes two vertically opposed swing arms, one end of which is hinged to the main body, and the other end of which is rotatably mounted on a track wheel. A drive component, disposed within the main body, is used to drive the swing arms to swing and adjust the clamping distance between the two sets of guide components formed by the track wheel. By setting the swing arms, the track wheel can swing in an arc on the main body. Furthermore, by setting the drive component, the two swing arms in each set of guide components swing relative to each other. With the cooperation of the two sets of guide components, the clamping distance between each pair of opposite track wheels in each set of guide components can be freely adjusted, thus easily adapting to the external dimensions of the steel structure, thereby facilitating the installation of the guide components.

Description

Technical Field

[0001] This invention relates to the field of steel structure installation technology, and more specifically to a verticality calibration device for the installation of prefabricated building steel structures. Background Technology

[0002] In portal steel frame structure projects, in order to ensure the verticality of the steel structure columns, previous projects used a plumb bob with a magnet fixed at a height of about two meters. However, high precision is required for high-quality projects, and the previous methods cannot accurately reflect verticality deviations or are inefficient in detection and calibration.

[0003] Patent document CN115371638A, published on November 22, 2022, discloses a track-type verticality detection device for installing steel structure columns. The technical solution includes: a loading body, a column fixing device for fixing to the column, a power device for vertical up-and-down movement on the vertical plane of the column, and a Bluetooth module for remote control. The loading body includes two loading rods and multiple end supports. The loading rods are divided into control ends and free ends. A first end support is provided at the outer end of the free end of the loading rod, and a second end support is provided inside the control end of the loading rod. The column fixing device includes a track wheel, a track wheel support, a pressure wheel, a fixing rod, and a pressure wheel support. The power device includes a motor located at the control end of the loading rod, a power wheel support and a power wheel assembly sequentially assembled on the loading rod. Its advantages are: the entire device can move up and down on the steel structure and achieve efficient and accurate detection of the verticality of the steel column using a plumb bob.

[0004] As with the prior art of the aforementioned patent, by loading the entire device onto the steel structure and enabling it to automatically climb and detect, the detection efficiency and accuracy are obviously improved. However, in order to guide the device and ensure its stable operation on the steel structure, the side track wheel structure it is equipped with needs to match the external dimensions of the steel structure. Consequently, such track wheel structure requires a rather cumbersome installation operation based on the specific external dimensions of the steel structure before use. Therefore, there is an urgent need for a verticality calibration device for the installation of prefabricated building steel structures to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a verticality calibration device for the installation of prefabricated building steel structures, so as to overcome the above-mentioned shortcomings in the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A verticality calibration device for the installation of prefabricated building steel structure includes a main body set close to the inspection surface of the steel structure, and further includes: two sets of guide components set on opposite sides of the main body, each set of guide components including two swing rods set opposite each other, one end of the swing rods being hinged to the main body, and the other end being rotatably equipped with a track wheel; and a drive component set inside the main body for driving the swing rods to swing and adjust the clamping distance between the two sets of guide components formed by the track wheel.

[0008] Preferably, the main body is provided with two opposing first movable chambers, and a fixed axis is fixedly installed in the first movable chamber, and the swing arm is hinged to the fixed axis.

[0009] Preferably, the drive assembly includes a second movable compartment disposed within the main body, a drive plate movably disposed within the second movable compartment, two opposing sliding grooves disposed on the drive plate, and a sliding rod matching the sliding grooves fixedly disposed at the end of the swing arm away from the track wheel.

[0010] Preferably, a first elastic element is connected between the drive plate and the inner wall of the second movable compartment, and the drive plate is connected to a handle that slides through the main body via an extension plate.

[0011] Preferably, a drive seat is elastically and movably connected to the main body, and a rotating shaft is rotatably disposed on the side of the drive seat away from the main body. Multiple friction wheels are coaxially connected to the rotating shaft. A retaining ring is disposed on the end face of the track wheel away from the main body. The friction wheel and the retaining ring cooperate to clamp the steel structure entity. A limit component is disposed between the side of the drive seat near the main body and the extension plate.

[0012] Preferably, the limiting component includes a connecting rod fixedly mounted on the drive seat, one end of the connecting rod sliding through the main body to extend into the second movable compartment and fixedly mounted with a first hook body, and a docking groove provided at the end of the extension plate away from the drive plate, and a second hook body matching the first hook body is provided in the docking groove.

[0013] Preferably, a plumb bob is suspended on the end face of the main body away from the steel structure, a marking platform is provided on the lower side of the plumb bob, a conveying assembly for continuously conveying strips of paper to the marking platform is provided on the main body, and a marking assembly for marking the strips of paper is provided at the lower end of the plumb bob.

[0014] Preferably, the conveying assembly includes an unwinding wheel and a winding wheel rotatably disposed on the outer side of the main body. The unwinding wheel and the winding wheel are distributed on opposite sides of the marking platform, and the winding wheel is linked to the rotating shaft through a linkage assembly.

[0015] Preferably, the linkage assembly includes a first gear and a second gear that are rotatably mounted on a drive seat and mesh with each other. A first bevel gear is coaxially connected to the rotating shaft. A second bevel gear that meshes with the first bevel gear is coaxially connected to the first gear. The second gear is synchronously rotated and connected to a synchronous shaft. The end of the synchronous shaft away from the second gear is coaxially fixedly connected to the winding wheel through a one-way bearing.

[0016] Preferably, the marking component includes a cap body disposed at the lower end of the plumb bob, a floating groove being disposed inside the cap body, and a pen refill being elastically and movably connected within the floating groove.

[0017] In the above technical solution, the beneficial effects of the present invention are:

[0018] This verticality calibration device for installing prefabricated building steel structures uses a swing arm to allow the track wheels to swing in an arc on the main body. The drive assembly allows the two swing arms in each guide assembly to swing relative to each other. With the cooperation of the two guide assemblies, the clamping distance between each pair of opposite track wheels in the two guide assemblies can be freely adjusted, thus easily adapting to the external dimensions of the steel structure. This facilitates the installation of the guide assemblies and improves the convenience of the device.

[0019] It should be understood that the foregoing general description and the following detailed description are exemplary and illustrative only, and are not intended to limit this disclosure.

[0020] This application provides an overview of various implementations or examples of the technology described in this disclosure, and is not a full disclosure of the entire scope or all features of the disclosed technology. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0022] Figure 1 This is a schematic diagram of the overall structure provided for an embodiment of the present invention;

[0023] Figure 2 This is a frontal cross-sectional structural schematic diagram provided for an embodiment of the present invention;

[0024] Figure 3 Provided for embodiments of the present invention Figure 2 Enlarged structural diagram at point A;

[0025] Figure 4 Provided for embodiments of the present invention Figure 2 Enlarged structural diagram at point B;

[0026] Figure 5 This is another frontal cross-sectional structural schematic diagram provided in an embodiment of the present invention;

[0027] Figure 6 This is a side view cross-sectional structural schematic diagram provided in an embodiment of the present invention;

[0028] Figure 7 This is a schematic diagram of another side cross-sectional view of the structure provided in an embodiment of the present invention;

[0029] Figure 8 This is a top view cross-sectional structural diagram provided for an embodiment of the present invention;

[0030] Figure 9 Provided for embodiments of the present invention Figure 8 A magnified structural diagram at point C.

[0031] Explanation of reference numerals in the attached figures:

[0032] 1. Main body; 2. Swing rod; 3. Track wheel; 4. First movable chamber; 5. Fixed shaft; 6. Second movable chamber; 7. Drive plate; 8. Sliding groove; 9. Sliding rod; 10. First elastic element; 11. Extension plate; 12. Handle; 13. Drive seat; 14. Rotating shaft; 15. Friction wheel; 16. Contact ring; 17. Connecting rod; 18. First hook body; 19. Connecting groove; 20. Second hook body; 21. Boll pin; 22. Marking platform; 23. Unwinding reel; 24. Rewinding reel; 25. First tooth 26. Wheel; 27. Second gear; 28. First bevel gear; 29. ​​Second bevel gear; 30. Synchronous shaft; 31. Cap body; 32. Floating groove; 33. Pen refill; 34. Guide post; 35. Second elastic element; 36. Rewind chamber; 37. Pressure roller; 38. Convex ring; 39. Third elastic element; 40. Pen tip; 41. Suspension plate; 42. Slider; 43. Concave ring; 44. Slide groove; 45. Third gear; 46. Rack; 47. Connector; 48. Lever; 49. Lever block; 40. Through groove. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0034] Please see Figure 1-9The present invention provides a verticality calibration device for the installation of prefabricated steel structures, comprising a main body 1 disposed close to the inspection surface of the steel structure, and further comprising: two sets of guide components disposed on opposite sides of the main body 1, each set of guide components comprising two swing rods 2 disposed vertically opposite each other, one end of the swing rod 2 being hinged to the main body 1, and the other end being rotatably provided with a track wheel 3; and a drive component disposed within the main body 1, used to drive the swing rods 2 to swing to adjust the clamping distance formed between the two sets of guide components by the track wheel 3.

[0035] Specifically, the steel structure is shaped like a vertically arranged I-beam; the main body 1 is set parallel to the detection surface of the steel structure. Two sets of guide components are symmetrically arranged and extend to the outer side of the steel structure; each set of guide components includes two swing rods 2 that are vertically opposite each other and swing synchronously in opposite directions; the width of the track wheel 3 is not less than the thickness of the steel plate of the steel structure; the outer circumference of the track wheel 3 is provided with grooves to increase the friction between it and the surface of the steel structure. The drive component can drive the two swing rods 2 in the same set of guide components to swing synchronously in opposite directions. With the two sets of guide components symmetrically arranged, the two swing rods 2 located on the upper or lower side can drive the two track wheels 3 with opposite heights to move closer or further apart to adjust their distance. In practical use, after the main body 1 is placed close to the steel structure, the two swing rods 2 in the same group are driven to rotate synchronously in opposite directions by the drive component. The swing rods 2 drive the track wheels 3 to swing closer to the side end face of the steel structure. With the setting of two sets of symmetrical guide components, each pair of track wheels 3 located on the upper or lower side can clamp the two sides of the steel structure. This method not only facilitates the installation of the guide components, but also allows the guide components to adapt to different steel structures within a certain size range, improving the convenience of the device.

[0036] Compared with the prior art, the verticality calibration device for the installation of prefabricated building steel structure proposed in this embodiment of the invention, by setting up a swing rod 2, allows the track wheel 3 to swing in an arc on the main body 1. Then, by setting up a drive component, the two swing rods 2 contained in each group of guide components swing relative to each other. With the cooperation of the two groups of guide components, the clamping distance between each pair of opposite track wheels 3 in the two groups of guide components can be freely adjusted, thereby conveniently adapting to the external dimensions of the steel structure, which facilitates the installation of the guide components and improves the convenience of the device.

[0037] As a preferred technical solution of this embodiment, the main body 1 is provided with two opposing first movable chambers 4. A fixed shaft 5 is fixedly provided in the first movable chamber 4, and the swing rod 2 is hinged to the fixed shaft 5. Specifically, the first movable chambers 4 are provided on opposite sides in the horizontal direction on the main body 1. The upper side and one side of the first movable chamber 4 are connected to the surface of the main body 1 and are used for the movable extension of the swing rod 2. A through hole matching the fixed shaft 5 is opened in the middle part of the swing rod 2. One end of the swing rod 2 is kept extending out of the first movable chamber 4 and swinging, while the other end is kept swinging inside the first movable chamber 4.

[0038] As a preferred technical solution of this embodiment, the driving component includes a second movable bin 6 arranged inside the main body 1. A driving plate 7 is movably arranged inside the second movable bin 6. Two opposite sliding grooves 8 are arranged on the driving plate 7. At the end of the swing rod 2 far from the track wheel 3, a sliding rod 9 matching the sliding groove 8 is fixedly arranged. Specifically, both ends of the second movable bin 6 are respectively connected and communicated with two first movable bins 4, and form an integral "C" shape with the first movable bins 4; the driving plate 7 slides inside the second movable bin 6, and a part of it corresponds to the first movable bin 4; two driving plates 7 are symmetrically arranged inside the second movable bin 6, corresponding to two groups of swing rods 2 respectively; the sliding groove 8 moves along with the driving plate 7 to push the sliding rod 9 through the inner wall, and then drives one end of the swing rod 2 to move so that the whole swing rod 2 rotates, then the swing rod 2 can drive the track wheel 3 to swing. In actual use of this technical solution, when the two driving plates 7 slide in the second movable bin 6 and approach each other, the driving plate 7 pushes the sliding rod 9 through the sliding groove 8 to make the swing rod 2 rotate. At this time, the swing rod 2 drives the track wheel 3 to swing away from the steel structure; when the two driving plates 7 slide in the second movable bin 6 and move away from each other, the driving plate 7 pushes the sliding rod 9 through the sliding groove 8 to make the swing rod 2 rotate. At this time, the swing rod 2 drives the track wheel 3 to swing towards the steel structure.

[0039] As a preferred technical solution of this embodiment, a first elastic member 10 is connected between the driving plate 7 and the inner wall of the second movable bin 6. The driving plate 7 is connected with a handle rod 12 that slides through the main body 1 through an extension plate 11. Specifically, grooves are arranged on the opposite sides of the two driving plates 7 and are used to connect the first elastic member 10. The first elastic member 10 can preferably be a spring, and its two ends are respectively connected to the side wall of the second movable bin 6 far from its center and the inner wall of the groove on the driving plate 7; the first elastic member 10 keeps pulling the driving plate 7, so that the two driving plates 7 have a tendency to move away from each other, that is, the swing rod 2 has a tendency to drive the track wheel 3 to swing close to the steel structure; when the two track wheels 3 at the same height clamp the steel structure, the elastic potential energy of the first elastic member 10 exists, so that the track wheel 3 applies a force to clamp the steel structure, thereby assisting the main body 1 to be stable on the steel structure; the extension plate 11 is fixedly connected to the side of the driving plate 7 far from the first elastic member 10, and its moving direction is the same as that of the driving plate 7; one end of the handle rod 12 is fixedly connected to the surface of the extension plate 11 far from the steel structure, and the other end slides through the surface of the main body 1 far from the steel structure. The handle rod 12 is used to drive the driving plate 7 to move actively through the extension plate 11.

[0040] In another embodiment proposed by the present invention, a driving seat 13 is elastically and movably connected to the main body 1. A rotating shaft 14 is rotatably provided on the side of the driving seat 13 away from the main body 1. A plurality of friction wheels 15 are coaxially connected to the rotating shaft 14. A sticking ring 16 is provided on the end face of the track wheel 3 away from the main body 1. The friction wheels 15 and the sticking ring 16 cooperate to clamp the steel structure entity. A limiting component is provided between the side of the driving seat 13 close to the main body 1 and the extension plate 11. Specifically, a concave area is provided on the side of the main body 1 close to the steel structure. The driving seat 13 is movably arranged in the concave area; a plurality of guide columns 33 are fixedly arranged in the concave area. The guide columns 33 movably penetrate through the driving seat 13. A second elastic member 34 is connected between the driving seat 13 and the inner wall of the concave area. The second elastic member 34 can preferably be a spring and is sleeved on the guide column 33; the second elastic member 34 enables the driving seat 13 to keep extending out of the concave area, and with the arrangement of the sticking ring 16 on the track wheel 3, the detection surface steel plate of the steel structure can be clamped from the front and back directions. Then, with the clamping of the side surface of the steel structure by the track wheel 3, the positioning of the device and the steel structure can be realized; the driving seat 13 is in a "C" shape, and both ends are arranged towards the direction of the steel structure; the rotating shaft 14 is rotatably connected between the two ends of the driving seat 13; the surface of the friction wheel 15 is in close contact with the surface of the steel structure; a driving motor for driving the rotation of the rotating shaft 14, a power supply and other structures are also installed on the driving seat 13. The above structures are prior art and will not be elaborated; the outer diameter of the sticking ring 16 is 10 - 30 mm larger than the outer diameter of the friction wheel 15; the limiting component is used to limit the extension plates 11 that are close to each other, and the limiting function is cancelled when the driving seat 13 moves back into the concave area. In actual use of this technical solution, first, the extension plates 11 are pulled to be close to each other through the handle rod 12, and then the limiting component limits the two extension plates 11. At this time, under the transmission effect of the extension plates 11 on the driving plate 7, the sliding groove 8, the sliding rod 9 and the swing rod 2 in sequence, the two track wheels 3 on both sides can be driven to swing away from each other to keep the clamping distance maximum, and the first elastic member 10 is in a stretched state and stores elastic potential energy; then the main body 1 is close to the detection surface of the steel structure, so that the friction wheel 15 contacts the surface of the steel structure. The two track wheels 3 are arranged on the opposite sides of the steel structure. Then, the main body 1 is further pushed closer to the surface of the steel structure. The driving seat 13 can move into the concave area on the main body 1, compressing the second elastic member 34 and storing elastic potential energy, and cancelling the limitation of the limiting component on the extension plate 11. The elastic potential energy of the first elastic member 10 is released, pulling the driving plate 7, and the two driving plates 7 move away from each other. According to the above principle process, the two track wheels 3 with relative heights on both sides swing close to each other to reduce the clamping distance and clamp the two sides of the steel structure. Then, the main body 1 is released, and the elastic potential energy of the second elastic member 34 is released. The driving seat 13 elastically extends out of the concave area on the main body 1, and then can cooperate with the sticking ring 16 on the track wheel 3 to clamp the front and back surfaces of the detection surface steel plate of the steel structure. With this, the clamping of the two sides of the steel structure by the track wheel 3 is used to smoothly realize the positioning and installation of the device and the steel structure. Moreover, the track wheel 3 realizes automatic clamping distance adjustment and clamping, which is very convenient and labor-saving.

[0041] As a preferred technical solution of this embodiment, the limiting component includes a connecting rod 17 fixedly mounted on the drive seat 13. One end of the connecting rod 17 slides through the main body 1 to extend into the second movable chamber 6 and is fixedly mounted with a first hook 18. A docking groove 19 is provided at the end of the extension plate 11 away from the drive plate 7. A second hook 20 matching the first hook 18 is provided in the docking groove 19. Specifically, the extension directions of both ends of the connecting rod 17 are consistent with the movement direction of the drive seat 13. There are two connecting rods 17, corresponding to two extension plates 11. The first hook 18 is elastic. The docking groove 19 is horizontally corresponding to the first hook 18. The hooking position of the first hook 18 is located on the side close to the drive seat 13. The hooking position of the second hook 20 is located on the side away from the drive seat 13. In practical use, when the extension plate 11 slides towards the connecting rod 17 in the second movable chamber 6, the first hook 18 can move towards the second hook 20 in the docking groove 19. At this time, the first hook 18 and the second hook 20 are squeezed against each other, causing the first hook 18 to bend elastically so that they can be smoothly interlocked and hooked. With the setting of the second elastic element 34, the drive seat 13 is kept extending out of the recessed area of ​​the main body 1, so that the first hook 18 and the second hook 20 are hooked. This limits the extension plate 11 from moving back and maintains the elastic potential energy of the first elastic element 10. When the drive seat 13 moves into the recessed area on the main body 1, the drive seat 13 drives the connecting rod 17 to continue to go deeper into the second movable chamber 6. Then the connecting rod 17 drives the first hook 18 and the second hook 20 to be misaligned, thereby contacting and hooking, that is, the limitation on the extension plate 11 is canceled. The extension plate 11 and the drive plate 7 can be pulled back under the action of the release of the elastic potential energy of the first elastic element 10.

[0042] In another embodiment of the present invention, a plumb bob 21 is suspended from the end face of the main body 1 away from the steel structure. A marking platform 22 is provided on the lower side of the plumb bob 21. A conveying assembly for continuously conveying strips of paper onto the marking platform 22 is provided on the main body 1. A marking assembly for marking the strips of paper is provided at the lower end of the plumb bob 21. Specifically, the plumb bob 21 hangs freely; the marking platform 22 is set perpendicular to the surface of the main body 1; when the main body 1 is in a standard vertical position, the lower end of the plumb bob 21 corresponds to the center position of the upper surface of the marking platform 22; the conveying assembly is located on the main body 1 and the steel structure. During uniform climbing, the strip paper is synchronously and uniformly conveyed on the marking platform 22. The strip paper passing through the marking platform 22 can be marked by the marking component. When the main body 1 deviates from the verticality of the steel structure and tilts, the lower end of the plumb bob 21 will shift off the center of the marking platform 22. Under the action of the conveying component and the marking component, a line segment deviating from the center of the paper strip will appear on the strip paper. Combined with the proportional relationship between the height of the steel structure and the length of the strip paper, the verticality of the surface of the steel structure being tested can be vividly represented on the strip paper, thereby improving the calibration efficiency.

[0043] As a preferred technical solution in this embodiment, the conveying assembly includes an unwinding wheel 23 and a winding wheel 24 rotatably disposed on the outer side of the main body 1. The unwinding wheel 23 and the winding wheel 24 are distributed on opposite sides of the marking platform 22. The winding wheel 24 is linked to the rotating shaft 14 through a linkage assembly. Specifically, the height of the horizontal cross-section of the outermost strip of paper on the unwinding wheel 23 and the height of the horizontal cross-section of the strip of paper passed by the winding wheel 24 are not higher than the height of the horizontal cross-section of the upper surface of the marking platform 22. A winding chamber 35 is fixedly disposed on the main body 1. The strip of paper that passes around the winding wheel 24 enters the winding chamber 35 and is disposed therein. A pressure roller 36 is elastically and movably disposed at the upper end of the winding chamber 35. The pressure roller 36 abuts against the strip of paper on the winding wheel 24 to ensure that the winding wheel 24 generates sufficient friction force to wind the strip of paper.

[0044] As a further preferred technical solution of this embodiment, the linkage component includes a first gear 25 and a second gear 26 rotatably mounted on the drive seat 13, meshing with each other. A first bevel gear 27 is coaxially connected to the rotating shaft 14. A second bevel gear 28 meshing with the first bevel gear 27 is coaxially connected to the first gear 25. A synchronous shaft 29 is synchronously connected to the second gear 26. The end of the synchronous shaft 29 away from the second gear 26 is coaxially fixedly connected to the take-up reel 24 via a one-way bearing. Specifically, the first gear 25 and the second gear 26 are fitted together on the end face of the drive seat 13 near the main body 1. Through the meshing of the first gear 25 and the second gear 26, and the meshing of the first bevel gear 27 and the second bevel gear 28, the rotating shaft 14 and the synchronous shaft 29 are proportionally transmitted, that is, the crawling of the main body 1... The lifting speed is synchronized and proportional to the winding speed of the take-up reel 24. One end of the synchronous shaft 29 is set as a polygonal straight rod, which slides through the shaft of the second gear 26. This ensures that the rotation of the second gear 26 and the take-up reel 24 is synchronized and does not affect the relative movement between the main body 1 and the drive seat 13. The single-row bearing connection between the synchronous shaft 29 and the take-up reel 24 allows the rotation of the shaft 14 to be transmitted to the take-up reel 24 sequentially through the first bevel gear 27, the second bevel gear 28, the first gear 25, the second gear 26 and the synchronous shaft 29 when the main body 1 is climbing. When the main body 1 is descending, the synchronous shaft 29 and the take-up reel 24 can rotate relative to each other through the one-way bearing, so that the take-up reel 24 will not reverse and avoid the problem of the marked strip paper going back.

[0045] As a preferred technical solution of this embodiment, the marking assembly includes a cap 30 provided at the lower end of the plumb bob 21, a floating groove 31 provided inside the cap 30, and a pen refill 32 elastically connected inside the floating groove 31. Specifically, a protruding ring 37 is provided on the pen refill 32, and a third elastic element 38 is connected to the upper side of the protruding ring 37 and the inner top surface of the floating groove 31. The third elastic element 38 is preferably a spring and is sleeved on the pen refill 32. A pen tip 39 is provided at the lower end of the pen refill 32, and the lower end of the pen tip 39 abuts against the upper surface of the marking platform 22. When a strip of paper passes over the upper surface of the marking platform 22, the pen tip 39 can draw a line mark on the strip of paper. With the setting of the third elastic element 38, it can be ensured that when the freely hanging plumb bob 21 deviates from the center of the marking platform 22, the pen tip 39 can still abut against the upper surface of the marking platform 22.

[0046] In another embodiment of the present invention, a suspension plate 40 is provided on the main body 1, and a slider 41 is movably disposed within the suspension plate 40. The upper end of the plumb bob 21 is fixedly connected to the slider 41. The plumb bob 21 is provided with a concave ring 42 that matches the handle 12. When the two handles 12 approach each other, the slider 41 of the lifting assembly moves to make the plumb bob 21 rise and the handle 12 embed into the concave ring 42. Specifically, a sliding groove 43 that matches the slider 41 is provided within the suspension plate 40. A threading hole is opened at the lower end of the suspension plate 40 corresponding to the position directly above the center of the marking platform 22. The plumb bob 21 is set through the threading hole, and the end of the threading hole is chamfered. The handle 12 is cylindrical, and the end of the handle 12 away from the main body 1 is provided with a flange with an enlarged outer diameter. The clamping of the plumb bob 21 by the two handles 12 can position the plumb bob 21 and relax the plumb line for storage of the device.

[0047] As a preferred technical solution of this embodiment, the pull rope assembly includes a third gear 44 rotatably disposed in the second movable chamber 6, a rack 45 meshing with the third gear 44 on one of the extension plates 11, a slider 41 fixedly connected to a lever 47 movably disposed in the second movable chamber 6 via a connector 46, and a lever block 48 fixedly disposed on the third gear 44. Specifically, the lever 47 is suspended in the second movable chamber 6, with its lower end extending to a height close to the center of the third gear 44; a through groove 49 matching the connector 46 is disposed between the second movable chamber 6 and the slide groove 43, the through groove 49 restricts the movement range of the connector 46, thereby restricting the movement range of the slider 41 in the slide groove 43, and when the plumb bob 21 hangs freely, it pulls the slider 41 to one end of the movable range through its vertical line. In practical use, when the two extension plates 11 approach each other, i.e., when the guide components on both sides move away from each other to disassemble from the steel structure, the extension plates 11 drive the third gear 44 to rotate via the rack 45. The third gear 44 drives the lever 48 to rotate circumferentially. At this time, the lever 48 does not start to push the lever 47 to move. However, when the two extension plates 11 approach each other by a certain distance and before being limited by the limiting component, the rotation of the lever 48 begins to push the lever 47 to move. The lever 47 drives the slider 41 to move in the slide groove 43 via the connector 46. The slider 41 pulls the plumb bob 21 to rise, thereby moving away from the marking platform 22. When the two extension plates 11 approach each other and are in the position limited by the limiting component, the plumb bob 21 rises to the height of the concave ring 42 and the handle 12. At the same time, the two handles 12 approach each other with the extension plates 11 and are embedded in the concave ring 42, thereby clamping the plumb bob 21, which can position the plumb bob 21 and relax the plumb line. Furthermore, when the two extension plates 11 are far apart, that is, when the two sets of guide components are close to each other to clamp and position the steel structure, according to the above structural principle, the lever 48 can disengage from the lever 47, and the plumb bob 21 can hang freely to the specified height.

[0048] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A verticality calibration device for the installation of prefabricated building steel structures, comprising a main body (1) disposed close to the inspection surface of the steel structure, characterized in that, Also includes: Two sets of guide components are set on opposite sides of the main body (1). Each set of guide components includes two swing rods (2) arranged opposite each other. One end of the swing rod (2) is hinged to the main body (1), and the other end is rotatably equipped with a track wheel (3). The drive assembly, which is located inside the main body (1), is used to drive the swing arm (2) to swing to adjust the clamping distance between the two sets of guide assemblies through the track wheel (3); The main body (1) is provided with two opposing first movable chambers (4), and a fixed shaft (5) is fixedly provided in the first movable chamber (4). The swing rod (2) is hinged to the fixed shaft (5). The drive assembly includes a second movable compartment (6) provided inside the main body (1), a drive plate (7) is movably provided inside the second movable compartment (6), and two sliding grooves (8) are provided on the drive plate (7) and oppositely arranged above and below. A sliding rod (9) matching the sliding groove (8) is fixedly provided at the end of the swing rod (2) away from the track wheel (3). A first elastic element (10) is connected between the drive plate (7) and the inner wall of the second movable compartment (6), and the drive plate (7) is connected to a handle (12) that slides through the main body (1) via an extension plate (11). A drive seat (13) is elastically and movably connected to the main body (1). A rotating shaft (14) is rotatably arranged on the side of the drive seat (13) away from the main body (1). Multiple friction wheels (15) are coaxially connected on the rotating shaft (14). A retaining ring (16) is provided on the end face of the track wheel (3) away from the main body (1). The friction wheels (15) and the retaining ring (16) cooperate to clamp the steel structure entity. A limit component is provided between the drive seat (13) and the extension plate (11) on the side closer to the main body (1). A plumb bob (21) is suspended on the end face away from the steel structure of the main body (1); a suspension plate (40) is provided on the main body (1), and a slider (41) is movably arranged in the suspension plate (40). The upper end of the plumb bob (21) is fixedly connected to the slider (41). A concave ring (42) matching the handle (12) is provided on the plumb bob (21). When the two handles (12) approach each other, the slider (41) is driven to move by the lifting assembly so that the plumb bob (21) rises and the handle (12) is embedded in the concave ring (42); the lifting assembly includes a third gear (44) rotatably arranged in the second movable chamber (6), and a rack (45) meshing with the third gear (44) is provided on one of the extension plates (11). The slider (41) is fixedly connected to a movably arranged... The lever (47) in the second active compartment (6) has a lever (48) fixedly installed on the third gear (44); when the two extension plates (11) approach each other, the extension plates (11) drive the third gear (44) to rotate through the rack (45), the third gear (44) drives the lever (48) to rotate in a circle, the lever (48) pushes the lever (47) to move, the lever (47) drives the slider (41) to pull the plumb bob (21) up through the connector (46), when the two extension plates (11) approach each other and are in the position of the limiting component, the plumb bob (21) rises to the height of the concave ring (42) and the handle (12), and at the same time the two handles (12) approach each other with the extension plates (11) and are embedded in the concave ring (42), thereby clamping the plumb bob (21) and the vertical line slacks.

2. The verticality calibration device for prefabricated building steel structure installation according to claim 1, characterized in that, The limiting component includes a connecting rod (17) fixedly mounted on the drive seat (13). One end of the connecting rod (17) slides through the main body (1) to extend into the second movable compartment (6) and is fixedly mounted with a first hook (18). The end of the extension plate (11) away from the drive plate (7) is provided with a docking groove (19). A second hook (20) matching the first hook (18) is provided in the docking groove (19).

3. The verticality calibration device for prefabricated building steel structure installation according to claim 1, characterized in that, A marking platform (22) is provided on the lower side of the plumb bob (21), and a conveying component for continuously conveying strip paper to the marking platform (22) is provided on the main body (1). A marking component for marking the strip paper is provided at the lower end of the plumb bob (21).

4. The verticality calibration device for prefabricated building steel structure installation according to claim 3, characterized in that, The conveying assembly includes an unwinding wheel (23) and a winding wheel (24) rotatably disposed on the outer side of the main body (1). The unwinding wheel (23) and the winding wheel (24) are distributed on opposite sides of the marking platform (22). The winding wheel (24) is linked to the rotating shaft (14) through a linkage assembly.

5. The verticality calibration device for prefabricated building steel structure installation according to claim 4, characterized in that, The linkage assembly includes a first gear (25) and a second gear (26) rotatably mounted on a drive seat (13), a first bevel gear (27) coaxially connected to the rotating shaft (14), a second bevel gear (28) coaxially connected to the first gear (25) and meshing with the first bevel gear (27), a synchronous shaft (29) synchronously connected to the second gear (26), and a one-way bearing coaxially fixedly connected to the winding wheel (24) at the end of the synchronous shaft (29) away from the second gear (26).

6. The verticality calibration device for prefabricated building steel structure installation according to claim 3, characterized in that, The marking assembly includes a cap (30) provided at the lower end of a plumb bob (21), a floating groove (31) provided inside the cap (30), and a pen refill (32) elastically connected inside the floating groove (31).

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