Large-span steel roof truss positioning offset compensation device

Abstract

The utility model discloses a large -span steel roof truss positioning offset compensation device relates to steel roof truss positioning technical field, including base, top seat, horizontal offset compensation mechanism, vertical offset compensation mechanism and bolt, base installs at the upper end of the column, and top seat installs at the lower extreme of steel roof truss, and horizontal offset compensation mechanism sets up between base and top seat, and vertical offset compensation mechanism sets up in the inside of top seat, and bolt is in proper order and passes through top seat, horizontal offset compensation mechanism and vertical offset compensation mechanism connection. In the utility model, set up horizontal offset compensation mechanism and vertical offset compensation mechanism, can compensate the displacement of steel roof truss horizontal and vertical direction, reduced the dependence to heavy external equipment and complex artificial adjustment, promoted installation efficiency, reduced construction difficulty and cost, set up expansion pipe, reduced the frictional resistance of bolt bottom in the offset compensation process, when the bolt of final positioning is tightened, increase friction and shearing force, ensure the security and durability of positioning.

Description

Technical Field

[0001] This utility model relates to the field of steel roof truss positioning technology, and in particular to a positioning offset compensation device for large-span steel roof trusses. Background Technology

[0002] In the installation of long-span steel roof trusses, the connection between the column top and the roof truss support is usually fixed with bolts. Due to the inevitable dimensional deviations that occur during the fabrication, transportation and hoisting of steel structures, coupled with the thermal expansion and contraction caused by temperature changes, bolt misalignment and hole misalignment often occur.

[0003] The traditional solution involves repeatedly adjusting the steel roof truss using tools such as jacks and chain hoists. This process not only adds extra construction steps, consumes time and manpower, but also requires a high level of experience from the operators. Summary of the Invention

[0004] The purpose of this utility model is to propose a positioning offset compensation device for large-span steel roof trusses in order to solve the above-mentioned problems.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: a large-span steel roof truss positioning offset compensation device, which is installed between the steel roof truss and the column, including a base, a top seat, a horizontal offset compensation mechanism, a vertical offset compensation mechanism, and bolts. The base is installed at the upper end of the column, and the top seat is installed at the lower end of the steel roof truss. The horizontal offset compensation mechanism is installed between the base and the top seat to provide horizontal displacement compensation. The vertical offset compensation mechanism is installed inside the top seat to provide vertical displacement compensation. The bolts pass through the top seat, the horizontal offset compensation mechanism, and the vertical offset compensation mechanism in sequence and are connected. The lower end of the bolts is connected to the base. The bottom of the base is provided with nuts for fixing the bolts.

[0006] Preferably, the horizontal offset compensation mechanism includes a support and a spring. The support is disposed between the base and the top seat. A cavity is reserved between the inner side of the support and the steel roof truss. A threaded hole for threaded connection with a bolt is opened on the top of the support. The bolt is located above the support and a spring is sleeved on it. A groove for accommodating the spring is opened at the bottom of the top seat.

[0007] Preferably, the vertical offset compensation mechanism includes a sleeve and a telescopic rod, the top of the top seat has a through hole, the sleeve is sleeved on the outside of the bolt, and the telescopic rod is arranged in an array between the sleeve and the through hole.

[0008] Preferably, the telescopic rod consists of an outer cylinder, an inner rod, a piston, and a second spring. The outer cylinder is installed on the inner wall of the through hole. One end of the inner rod is slidably connected to the outer cylinder. One end of the inner rod extending out of the outer cylinder is fixedly connected to the outer wall of the sleeve. The other end of the inner rod extending into the outer cylinder is fitted with a piston. The end of the outer cylinder away from the piston is threadedly connected to a screw. A second spring is connected between the screw and the piston. Adjustment holes adapted to the size of the screw are provided on both the outer and inner sides of the top seat.

[0009] Preferably, the inner side of the sleeve is symmetrically equipped with sliders, and the outer side of the bolt is provided with a groove that matches the size of the sliders.

[0010] Preferably, the lower end of the bolt is fitted with an expansion tube, and the top of the base is provided with a connecting hole that mates with the expansion tube. The upper end of the connecting hole is an insertion part that matches the size of the expansion tube, and the lower end of the connecting hole is a threaded part that is threaded to the bolt.

[0011] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are: 1. In this application, a horizontal offset compensation mechanism and a vertical offset compensation mechanism are set up to guide the bolts and compensate for the horizontal and vertical displacement of the steel roof truss. Compared with traditional tools such as jacks and chain hoists, no additional construction steps are required, reducing the reliance on heavy external equipment and complex manual adjustments, thereby improving installation efficiency and reducing construction difficulty and cost.

[0012] 2. In this application, an expansion tube is provided, and the upper end of the connecting hole cooperates with the expansion tube. During the offset compensation process, the frictional resistance on the bottom of the bolt is reduced, and the service life of the bolt is increased. When the bolt is finally positioned and tightened, the lower end of the connecting hole limits the expansion tube to move further downward, so that the expansion tube expands under the compression of the bolt, increasing the friction and shear resistance, and ensuring the safety and durability of the positioning. Attached Figure Description

[0013] Figure 1 A schematic diagram of the overall structure according to an embodiment of the present utility model is shown; Figure 2 A partial cross-sectional view of the overall structure according to an embodiment of the present invention is shown; Figure 3 A cross-sectional view of a horizontal offset compensation mechanism according to an embodiment of the present invention is shown; Figure 4 The present invention provides an embodiment of the present invention. Figure 2 Enlarged view of point A in the middle; Figure 5 A cross-sectional view of the internal structure of a telescopic rod according to an embodiment of the present invention is shown; Figure 6 A schematic diagram of a sleeve and bolt connection structure according to an embodiment of the present invention is shown; Figure 7 A partially enlarged view of the internal structure of the base according to an embodiment of the present invention is shown.

[0014] Legend: 1. Steel roof truss; 2. Column; 3. Base; 4. Top seat; 5. Horizontal offset compensation mechanism; 6. Vertical offset compensation mechanism; 7. Bolt; 8. Nut; 9. Expansion tube; 10. Screw; 11. Support; 12. Threaded hole; 13. Cavity; 14. Groove; 15. Spring 1; 16. Through hole; 17. Sleeve; 18. Telescopic rod; 19. Outer cylinder; 20. Inner rod; 21. Piston; 22. Spring 2; 23. Slider; 24. Slide groove; 25. Connecting hole. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0016] Please see Figure 1 and Figure 2 This utility model provides a technical solution: a large-span steel roof truss positioning offset compensation device, which is set between the steel roof truss 1 and the column 2, including a base 3, a top seat 4, a horizontal offset compensation mechanism 5, a vertical offset compensation mechanism 6 and bolts 7. The base 3 is installed at the upper end of the column 2, and the top seat 4 is installed at the lower end of the steel roof truss 1. In specific implementation, the base 3 and the column 2, and the top seat 4 and the steel roof truss 1 can be fixedly connected by welding or by high-strength bolts, etc. The horizontal offset compensation mechanism 5 is located between the base 3 and the top seat 4 to provide horizontal displacement compensation. The vertical offset compensation mechanism 6 is located inside the top seat 4 to provide vertical displacement compensation. The bolt 7 passes through the top seat 4, the horizontal offset compensation mechanism 5 and the vertical offset compensation mechanism 6 in sequence and is connected to the base 3. The bottom of the base 3 is provided with a nut 8 for fixing the bolt 7. During operation, the bolt 7 is first left in a partially tightened state so that the horizontal and vertical offset compensation mechanism 6 can function freely to adapt to and compensate for installation deviations. After the steel roof truss 1 is precisely adjusted to the design position, the bolt 7 is then fully tightened, and finally the nut 8 at the bottom of the base 3 is tightened to lock it and prevent loosening under vibration load.

[0017] Specifically, such as Figure 3 As shown, the horizontal offset compensation mechanism 5 includes a support 11 and a spring 15. The support 11 is located between the base 3 and the top seat 4. A cavity 13 is reserved between the inner side of the support 11 and the steel roof truss 1. The cavity 13 provides compensation space for the support 11. A threaded hole 12 is provided on the top of the support 11 for threaded connection with the bolt 7. The bolt 7 is located above the support 11 and the spring 15 is sleeved on it. A groove 14 for accommodating the spring 15 is provided at the bottom of the top seat 4. The design of the threaded hole 12 makes the bolt 7 and the support 11 locked into a whole in the compensation state. This whole is elastically supported by the spring 15 on the top seat 4 and the steel roof truss 1. When locking is required, the bolt 7 moves downward relative to the whole, tightening all components to complete rigid fixation.

[0018] Specifically, such as Figure 4 As shown, the vertical offset compensation mechanism 6 includes a sleeve 17 and a telescopic rod 18. The top of the top seat 4 has a through hole 16. The sleeve 17 is sleeved on the outside of the bolt 7. The telescopic rod 18 is arranged in an array between the sleeve 17 and the through hole 16. The sleeve 17 acts as a wear-resistant bushing to reduce the direct contact and wear between the bolt 7 and the top seat 4 when it is horizontally offset. The top of the bolt 7 has a bolt head. A stepped hole larger than the bolt head is machined above the through hole 16 to ensure that the bolt head has enough clearance when it is horizontally floating and will not interfere with the top seat 4. As an optimization solution, in specific implementation, after positioning, a sealing cover plate can be installed in the stepped hole for sealing to achieve dust prevention and protection.

[0019] Specifically, such as Figure 5 As shown, the telescopic rod 18 consists of an outer cylinder 19, an inner rod 20, a piston 21, and a second spring 22. The outer cylinder 19 is installed on the inner wall of the through hole 16. The inner rod 20 is slidably connected to one end of the outer cylinder 19. The end of the inner rod 20 extending out of the outer cylinder 19 is fixedly connected to the outer wall of the sleeve 17, so that any horizontal movement of the sleeve 17 will directly drive the inner rod 20 to extend or retract. The other end of the inner rod 20 extending into the outer cylinder 19 is equipped with a piston 21. The end of the outer cylinder 19 away from the piston 21 is threadedly connected to a screw 10. A second spring 22 is connected between the screw 10 and the piston 21. The outer and inner sides of the top seat 4 are provided with adjustment holes that are adapted to the size of the screw 10. Through these adjustment holes, the screw 10 can be adjusted with a tool to adjust the preload of the second spring 22, thereby realizing the floating range of horizontal offset and ensuring structural stability.

[0020] Specifically, such as Figure 6As shown, the inner side of the sleeve 17 is symmetrically equipped with sliders 23, and the outer side of the bolt 7 is provided with a groove 24 that matches the size of the slider 23. The slider 23 and the groove 24 limit the relative vertical movement between the bolt 7 and the sleeve 17, while preventing the sleeve 17 and the bolt 7 from rotating or shifting relative to each other in the horizontal plane, thus avoiding interference and wear caused by unexpected displacement between the sleeve 17 and the bolt 7.

[0021] Specifically, such as Figure 2 and Figure 7 As shown, to further improve the positioning offset compensation effect, an expansion tube 9 is sleeved on the lower end of the bolt 7, and a connecting hole 25 that mates with the expansion tube 9 is opened on the top of the base 3. The upper end of the connecting hole 25 is an insertion part that matches the size of the expansion tube 9, and the lower end of the connecting hole 25 is a threaded part that is threaded to the bolt 7. When offset compensation is performed, the upper end of the connecting hole 25 contacts the expansion tube 9, and the expansion tube 9 plays the role of guiding alignment and reducing friction, effectively protecting the threads of the bolt 7 from scratching and wear. When positioning, the lower end of the connecting hole 25 plays the role of limiting the expansion tube 9. At this time, the expansion tube 9 expands by the compression of the bolt 7 and is interference-fitted with the upper end of the connecting hole 25, which plays the role of increasing shear resistance and preventing loosening.

[0022] In summary, the specific working process of the large-span steel roof truss positioning offset compensation device provided in this embodiment is as follows: Horizontal floating and compensation: When there is an installation deviation in the steel roof truss 1, since the diameter of the through hole 16 on the top seat 4 is larger than the diameter of the bolt 7, a horizontal floating gap is formed. The bolt 7 can move horizontally relative to the top seat 4 and the steel roof truss 1 within this gap range and automatically adapt to the correct alignment.

[0023] Vertical floating and limiting: Bolt 7 can also float in the vertical direction through sleeve 17 and telescopic rod 18. The array telescopic rod 18 provides controllable elastic support for the vertical floating of bolt 7 through its internal spring 22.

[0024] In the final locking stage, after the bolt 7 has automatically compensated for all installation deviations and reached the correct position, it is tightened completely. At this time, the expansion tube 9 is pressed into the narrow area of ​​the connecting hole 25 to generate radial expansion, forming a strong interference fit. Finally, the nut 8 is tightened to achieve double locking and transform into a stable rigid node.

[0025] The above description of the embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A positioning offset compensation device for a large-span steel roof truss, installed between the steel roof truss (1) and the column (2), characterized in that, include: The base (3) is installed on the upper end of the column (2); Top seat (4) is installed at the lower end of the steel roof truss (1); A horizontal offset compensation mechanism (5) is provided between the base (3) and the top seat (4) to provide horizontal displacement compensation; A vertical offset compensation mechanism (6) is provided inside the top seat (4) to provide vertical displacement compensation; Bolt (7) passes through the top seat (4), horizontal offset compensation mechanism (5) and vertical offset compensation mechanism (6) in sequence, and its lower end is connected to the base (3). The bottom of the base (3) is provided with a nut (8) for fixing the bolt (7).

2. The large-span steel roof truss positioning offset compensation device according to claim 1, characterized in that, The horizontal offset compensation mechanism (5) includes a support (11) and a spring (15). The support (11) is located between the base (3) and the top seat (4). A cavity (13) is reserved between the inner side of the support (11) and the steel roof truss (1). A threaded hole (12) for threaded connection with a bolt (7) is opened on the top of the support (11). The bolt (7) is located above the support (11) and the spring (15) is sleeved on it. A groove (14) for accommodating the spring (15) is opened at the bottom of the top seat (4).

3. The large-span steel roof truss positioning offset compensation device according to claim 1, characterized in that, The vertical offset compensation mechanism (6) includes a sleeve (17) and a telescopic rod (18). The top of the top seat (4) has a through hole (16). The sleeve (17) is sleeved on the outside of the bolt (7). The telescopic rod (18) is arranged in an array between the sleeve (17) and the through hole (16).

4. The large-span steel roof truss positioning offset compensation device according to claim 3, characterized in that, The telescopic rod (18) is composed of an outer cylinder (19), an inner rod (20), a piston (21), and a second spring (22). The outer cylinder (19) is installed on the inner wall of the through hole (16). The inner rod (20) is slidably connected to one end of the outer cylinder (19). The end of the inner rod (20) extending out of the outer cylinder (19) is fixedly connected to the outer wall of the sleeve (17). The other end of the inner rod (20) extending into the outer cylinder (19) is fitted with a piston (21). The end of the outer cylinder (19) away from the piston (21) is threadedly connected to a screw (10). A second spring (22) is connected between the screw (10) and the piston (21). The outer and inner sides of the top seat (4) are provided with adjustment holes that are adapted to the size of the screw (10).

5. The large-span steel roof truss positioning offset compensation device according to claim 3, characterized in that, The inner side of the sleeve (17) is symmetrically equipped with a slider (23), and the outer side of the bolt (7) is provided with a groove (24) that matches the size of the slider (23).

6. The large-span steel roof truss positioning offset compensation device according to claim 1, characterized in that, The lower end of the bolt (7) is fitted with an expansion tube (9), and the top of the base (3) is provided with a connection hole (25) that matches the expansion tube (9). The upper end of the connection hole (25) is an insertion part that matches the size of the expansion tube (9), and the lower end of the connection hole (25) is a threaded part that is threaded to the bolt (7).

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