Fabricated steel structure intelligent bolt connecting device and health monitoring method

Abstract

The invention relates to the technical field of bolt connection, and discloses a fabricated steel structure intelligent bolt connection device and a health monitoring method.The fabricated steel structure intelligent bolt connection device comprises a base, a supporting frame, arc-shaped plates and a circular groove plate, the supporting frame is fixedly connected to the upper surface of the base, and the arc-shaped plates are symmetrically and fixedly connected to the side wall of the supporting frame; the circular groove plate is fixedly connected to the upper surface of the base, the driving mechanism comprises a detection controller fixedly connected to the outer wall of the arc-shaped plate, an objective table II drives the arc-shaped groove to rotate through a linkage mechanism, and an abutting rod slides along the arc-shaped groove under limiting of a sliding groove I; a limiting plate is pushed to extrude a third telescopic rod and a detection spring of the detection assembly, and elastic force generated by the detection spring forms resistance to inhibit the rotation amplitude of a second objective table, so that a nut and a bolt move relatively, and the situation that the nut and the bolt rotate along with each other is avoided; the problems of insufficient pre-tightening force and thread damage caused by following rotation of the bolt in traditional installation are solved.

Description

Technical Field

[0001] This invention relates to the field of bolt connection technology, specifically to an intelligent bolt connection device and health monitoring method for prefabricated steel structures. Background Technology

[0002] Bolted connections are an assembly process in which bolts pass through the through holes of the connected parts and are used with washers and nuts to achieve mechanical connection. They are characterized by simple structure and convenient assembly and disassembly. This technology includes a variety of types such as hexagonal head bolts and flange bolts, and is widely used in automotive chassis, industrial pressing equipment and other fields. Its reliability depends on precise tightening torque control and anti-loosening measures.

[0003] Chinese invention patent CN118700081A discloses a bolt installation device for prefabricated steel structures, comprising: a supporting shell, a supporting pad fixedly connected to the bottom of the supporting shell, a fixed foot fixedly connected to the top of the supporting pad, a plastic pad fixedly connected to the top of the fixed foot, a buffer sleeve fixedly connected to the side of the supporting shell, a pressing member, a top-mounted ring fixedly connected to the outer surface of the top of the pressing member, a collar fixedly connected to the outer surface of the supporting shell, a first spring fixedly connected between the collar and the top-mounted ring, and a sliding plate fixedly connected to the inner surface of the supporting shell. In this prefabricated steel structure bolt installation device, the buffer sleeve can prevent plates or connectors from impacting the supporting shell, achieving a cushioning effect.

[0004] Furthermore, during traditional installation, the frictional torque between the nut and bolt threads is often greater than that between the nut and the steel plate support surface. In rough working environments, if the steel plate surface is untreated and has a low coefficient of friction, the support surface cannot effectively fix the bolt, making it easy for the bolt to rotate with the nut, resulting in the preload not meeting design requirements. In addition, traditional bolt installation relies heavily on manual experience and the use of ordinary torque wrenches, which has a high error rate and makes it difficult to accurately determine whether the preload is up to standard, thus easily leading to bolt loosening. Therefore, the prefabricated building steel structure bolt installation device disclosed in Chinese invention patent CN118700081A cannot prevent the bolt from rotating and cannot guarantee the stability of the bolt and steel plate after installation. Summary of the Invention

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this invention provides an intelligent bolt connection device and health monitoring method for prefabricated steel structures. It has advantages such as preventing bolts from following the bolt and real-time detection of preload, thus solving the problems of bolts easily rotating, difficulty in ensuring preload, and poor installation stability between bolts and steel plates.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, the present invention provides the following technical solution: a prefabricated intelligent bolt connection device for steel structures, comprising a base, a support frame, an arc-shaped plate, and a circular groove plate, wherein the support frame is fixedly connected to the upper surface of the base, the arc-shaped plate is symmetrically fixedly connected to the side wall of the support frame, and the circular groove plate is fixedly connected to the upper surface of the base, and further comprising:

[0009] The driving mechanism includes a detection controller fixedly connected to the outer wall of the arc-shaped plate, a platform fixedly connected to the top of the support frame, and a connecting component disposed at the bottom of the platform.

[0010] The protective detection mechanism includes a second platform disposed inside the circular groove plate, a second mounting groove opened on the top of the second platform, a bolt slidably connected inside the second mounting groove, a linkage mechanism disposed inside the circular groove plate, an annular plate disposed inside the circular groove plate, and a detection component disposed inside the circular groove plate.

[0011] Preferably, the connecting assembly includes a drive motor fixedly connected to the top of the first platform, a telescopic rod symmetrically fixedly connected to the side wall of the drive motor, a connecting block symmetrically fixedly connected to the bottom end of the telescopic rod symmetrically connected to the bottom end of the first telescopic rod, an annular slide fixedly connected to the inner wall of the first connecting block, a drive block rotatably connected to the outer wall of the annular slide, an installation groove symmetrically opened inside the drive block, a nut fixedly connected inside the installation groove symmetrically fixedly connected to the upper surface of the second platform, a telescopic rod symmetrically fixedly connected to the side wall of the fixed block, and a clamping block fixedly connected to the end of the telescopic rod symmetrically away from the fixed block.

[0012] Preferably, the mounting groove is composed of a circular groove at the top and a hexagonal groove at the bottom, and the hexagonal groove can magnetically fix the nut. The drive motor and the detection controller are electrically connected, and the telescopic rod is electrically connected to the drive motor.

[0013] Preferably, the telescopic rod two is electrically connected to the detection controller, the clamping block is made of rubber, and the driving block is electrically connected to the detection controller.

[0014] Preferably, the linkage mechanism includes a fixed rod fixedly connected to the lower surface of the inner cavity of the circular groove plate, a connecting plate rotatably connected to the top end of the fixed rod, a sliding groove 1 arranged in a circular array on the lower surface of the inner cavity of the circular groove plate, a sliding groove 2 arranged in a circular array on the inner side wall of the circular groove plate, a sliding groove 3 arranged on the inner side wall of the circular groove plate, a linkage plate 2 fixedly connected to the outer wall of the connecting plate 1, an arc-shaped groove arranged in a circular array inside the linkage plate 2, an abutment rod slidably connected inside the arc-shaped groove, and a limit plate fixedly connected to the bottom end of the abutment rod.

[0015] Preferably, the second platform is rotatably connected inside the third slide, and the first connecting plate is fixedly connected to the lower surface of the second platform.

[0016] Preferably, the annular plate is fixedly connected to the outer wall of the fixing rod, the limiting plate slides inside the second slide groove, and the bottom end of the abutment rod slides inside the first slide groove.

[0017] Preferably, the detection component includes mounting slots three arranged in a ring array and extending through the interior of the ring plate. A telescopic rod three is fixedly connected inside the mounting slot three. A baffle is fixedly connected to the telescopic end of the telescopic rod three away from the ring plate. A detection spring is sleeved on the outer wall of the telescopic end of the telescopic rod three. A connecting block two is fixedly connected to the end of the telescopic rod three away from the ring plate.

[0018] Preferably, the detection spring and the detection controller are electrically connected, the second connecting block is fixedly connected to the abutment rod, and the two ends of the detection spring are fixedly connected to the baffle and the fixed end of the telescopic rod, respectively.

[0019] A method for health monitoring of intelligent bolts in prefabricated steel structures includes the following steps:

[0020] Step 1: Install bolts and nuts, and preset the spring force value and drive motor parameters using the detection controller;

[0021] Step 2: Drive the motor to lower the nut and rotate it. When the bolt rotates, the linkage mechanism drives the arc groove to rotate, and the contact rod squeezes the detection spring to generate resistance and inhibit the rotation.

[0022] Step 3: The detection spring converts the spring force value into an electrical signal and transmits it to the detection controller. Tightening stops when the preset range is reached.

[0023] Step 4: Store the tightening data to generate an archive, and verify the installation accuracy by combining the BIM model and 3D scanning;

[0024] Step 5: Monitor preload fluctuations in real time, issue warnings when exceeding thresholds, predict lifespan based on data, and generate maintenance recommendations.

[0025] (III) Beneficial Effects

[0026] Compared with the prior art, the present invention provides an intelligent bolt connection device and health monitoring method for prefabricated steel structures, which has the following beneficial effects:

[0027] 1. The platform 2 drives the arc-shaped groove to rotate through the linkage mechanism. The contact rod slides along the arc-shaped groove under the limit of the slide groove 1, pushing the limit plate to squeeze the telescopic rod 3 of the detection component and the detection spring. The elastic force generated by the detection spring forms resistance, suppressing the rotation amplitude of the platform 2 and causing the nut and bolt to move relative to each other, avoiding the situation where the nut and bolt rotate together. This solves the problem of insufficient preload and thread damage caused by the bolt rotating together in traditional installation.

[0028] 2. By detecting the positive correlation between the spring force and the compressive force of the nut on the steel plate, the spring force is converted into an electrical signal and transmitted to the detection controller. When the spring force reaches the preset range, it reflects that the compressive force between the nut, bolt and steel plate and the installation stability meet the design requirements. This avoids the need for traditional manual torque and prevents the problem of insufficient preload leading to loose joints. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of an intelligent bolt connection device for prefabricated steel structures proposed in this invention.

[0030] Figure 2 This is a partial schematic diagram of the connecting components in an intelligent bolt connection device for prefabricated steel structures proposed in this invention.

[0031] Figure 3 This is a schematic diagram of the annular slide and connecting block in an intelligent bolt connection device for prefabricated steel structures proposed in this invention.

[0032] Figure 4 This is a partial structural diagram of the linkage mechanism in an intelligent bolt connection device for prefabricated steel structures proposed in this invention.

[0033] Figure 5 This is a schematic diagram of the platform 2 and telescopic rod 2 in the prefabricated steel structure intelligent bolt connection device proposed in this invention;

[0034] Figure 6 This is a partial structural diagram of the linkage mechanism in an intelligent bolt connection device for prefabricated steel structures proposed in this invention.

[0035] Figure 7 This is a schematic diagram of the connecting plate and the contact rod structure in an intelligent bolt connection device for prefabricated steel structures proposed in this invention.

[0036] Figure 8 This is a schematic diagram of the telescopic rod three and the connecting block two in the prefabricated steel structure intelligent bolt connection device proposed in this invention;

[0037] Figure 9 This is a partial structural diagram of the detection component in an intelligent bolt connection device for prefabricated steel structures proposed in this invention.

[0038] Figure 10 This is a schematic diagram of a smart bolt health monitoring method for prefabricated steel structures proposed in this invention.

[0039] In the diagram: 101, base; 102, support frame; 103, arc-shaped plate; 104, circular groove plate; 200, drive mechanism; 201, detection controller; 202, stage one; 203, connecting assembly; 2041, drive motor; 2042, telescopic rod one; 2043, connecting block one; 2044, annular slide; 2045, drive block; 2046, mounting slot one; 2047, nut; 2048, fixing block; 2049, telescopic rod two; 20410, clamping block; 300, protective detection mechanism; 30 1. Platform II; 302. Mounting Slot II; 303. Bolt; 304. Linkage Mechanism; 3051. Fixing Rod; 3052. Connecting Plate I; 3053. Slide I; 3054. Slide II; 3055. Slide III; 3056. Linkage Plate II; 3057. Arc-shaped Slot; 3058. Abutment Rod; 3059. Limiting Plate; 306. Detection Component; 3071. Mounting Slot III; 3072. Telescopic Rod III; 3073. Baffle; 3074. Detection Spring; 3075. Connecting Block II; 308. Annular Plate. Detailed Implementation

[0040] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0041] Example:

[0042] See attached document Figures 1 to 10 As shown, a prefabricated steel structure intelligent bolt connection device and health monitoring method include a base 101, a support frame 102, an arc-shaped plate 103, and a circular groove plate 104. The support frame 102 is fixedly connected to the upper surface of the base 101, the arc-shaped plate 103 is symmetrically fixedly connected to the side wall of the support frame 102, and the circular groove plate 104 is fixedly connected to the upper surface of the base 101. The device also includes:

[0043] The drive mechanism 200 includes a detection controller 201 fixedly connected to the outer wall of the arc plate 103, a platform 202 fixedly connected to the top of the support frame 102, and a connecting component 203 disposed at the bottom of the platform 202.

[0044] The protective testing mechanism 300 includes a second platform 301 disposed inside the circular groove plate 104, a second mounting groove 302 opened on the top of the second platform 301, a bolt 303 slidably connected inside the second mounting groove 302, a linkage mechanism 304 disposed inside the circular groove plate 104, an annular plate 308 disposed inside the circular groove plate 104, and a testing component 306 disposed inside the circular groove plate 104.

[0045] Furthermore, the connecting assembly 203 includes a drive motor 2041 fixedly connected to the top of the stage 202. The drive motor 2041 is electrically connected to the detection controller 201. A telescopic rod 2042 is symmetrically fixedly connected to the side wall of the drive motor 2041. The telescopic rod 2042 is electrically connected to the drive motor 2041. A connecting block 2043 is fixedly connected to the bottom end of the telescopic rod 2042. An annular slide 2044 is fixedly connected to the inner wall of the connecting block 2043. A driving block 2045 is rotatably connected to the outer wall of the annular slide 2044. The driving block 2045 is electrically connected to the detection controller 201. The drive block 2045 has an internal mounting groove 2046, and a nut 2047 is fixedly connected inside the mounting groove 2046. The mounting groove 2046 is composed of a circular groove at the top and a hexagonal groove at the bottom, and the hexagonal groove can magnetically fix the nut 2047. The upper surface of the platform 301 is symmetrically fixedly connected to a fixing block 2048. A telescopic rod 2049 is fixedly connected to the side wall of the fixing block 2048. There is an electrical connection between the telescopic rod 2049 and the detection controller 201. A clamping block 20410 is fixedly connected to the end of the telescopic rod 2049 away from the fixing block 2048. The clamping block 20410 is made of rubber.

[0046] It should be noted that the clamping part of the clamping block 20410 is located in the middle of the non-threaded section of the bolt 303 and will not come into contact with the lower surface of the steel plate. Under the control of the drive motor 2041, the telescopic end of the telescopic rod 2042 can only move the nut 2047 to the top of the bolt 303. Then the telescopic end of the telescopic rod 2042 can automatically telescopically follow the nut 2047.

[0047] Furthermore, the linkage mechanism 304 includes a fixed rod 3051 fixedly connected to the lower surface of the inner cavity of the circular groove plate 104, an annular plate 308 fixedly connected to the outer wall of the fixed rod 3051, a connecting plate 3052 rotatably connected to the top of the fixed rod 3051, the connecting plate 3052 being fixedly connected to the lower surface of the platform 301, a first sliding groove 3053 arranged in a ring array on the lower surface of the inner cavity of the circular groove plate 104, a second sliding groove 3054 arranged in a ring array on the inner side wall of the circular groove plate 104, and the inner side wall of the circular groove plate 104... A slide groove 3055 is provided on the upper part. A platform 2 301 is rotatably connected to the inside of the slide groove 3055. A connecting plate 2 3056 is fixedly connected to the outer wall of the connecting plate 1 3052. An arc-shaped groove 3057 is arranged in a ring array inside the connecting plate 2 3056. An abutment rod 3058 is slidably connected inside the arc-shaped groove 3057. The bottom end of the abutment rod 3058 slides inside the slide groove 1 3053. A limit plate 3059 is fixedly connected to the bottom end of the abutment rod 3058. The limit plate 3059 slides inside the slide groove 2 3054.

[0048] Furthermore, the detection component 306 includes a mounting groove 3071 arranged in a ring array and extending through the interior of the annular plate 308. A telescopic rod 3072 is fixedly connected inside the mounting groove 3071. A baffle 3073 is fixedly connected to the telescopic end of the telescopic rod 3072 away from the annular plate 308. A detection spring 3074 is sleeved on the outer wall of the telescopic end of the telescopic rod 3072. The two ends of the detection spring 3074 are fixedly connected to the baffle 3073 and the fixed end of the telescopic rod 3072, respectively. There is an electrical connection between the detection spring 3074 and the detection controller 201. A connecting block 3075 is fixedly connected to the end of the telescopic rod 3072 away from the annular plate 308. The connecting block 3075 is fixedly connected to the abutment rod 3058.

[0049] It should be noted that the detection spring 3074 can transmit the generated elastic force value to the inside of the detection controller 201 in the form of an electrical signal, so that the detection controller 201 can monitor the elastic force value of the detection spring 3074 and the preset elastic force value at all times. When the elastic force value of the detection spring 3074 reaches the preset elastic force value, the detection controller 201 controls the working state of the drive block 2045 and the telescopic rod 2042.

[0050] A method for health monitoring of intelligent bolts in prefabricated steel structures includes the following steps:

[0051] Step 1: Install bolt 303 and nut 2047, and preset the spring force value of detection spring 3074 and the parameters of drive motor 2041 through detection controller 201;

[0052] Step 2: Drive motor 2041 lowers nut 2047 and rotates. When bolt 303 rotates, linkage mechanism 304 drives arc groove 3057 to rotate. Contact rod 3058 squeezes detection spring 3074 to generate resistance and inhibit rotation.

[0053] Step 3: The detection spring 3074 converts the spring force value into an electrical signal and transmits it to the detection controller 201. Tightening stops when the preset range is reached.

[0054] Step 4: Store the tightening data to generate an archive, and verify the installation accuracy by combining the BIM model and 3D scanning;

[0055] Step 5: Monitor preload fluctuations in real time, issue warnings when exceeding thresholds, predict lifespan based on data, and generate maintenance recommendations.

[0056] The following describes the working process and principle of the above embodiments:

[0057] The work steps are as follows:

[0058] First, the operator places the nut 2047 and bolt 303 inside the first mounting slot 2046 and the second mounting slot 302. Then, the nut 2047 is fixed by the magnetic attraction of the first mounting slot 2046. Next, the operator controls the extension rod 2049 to extend via the detection controller 201, causing the clamping block 20410 to clamp and fix the bottom of the bolt 303. Then, the pre-drilled hole on the steel plate is fitted onto the outer wall of the bolt 303. Finally, the operator controls the drive motor 2041 to start working via the detection controller 201, causing the drive motor 2041 to control the extension rod 2047. 042 begins to extend downwards, causing the telescopic rod 2042 to move synchronously downwards through the connecting block 2043, which in turn drives the annular slide 2044 to move towards the top of the bolt 303. When the nut 2047 moves to the outer wall of the top of the bolt 303, the operator controls the drive block 2045 to rotate inside the annular slide 2044 through the detection controller 201. This causes the annular slide 2044 to drive the nut 2047 to rotate synchronously, so that the nut 2047 moves towards the bottom of the bolt 303 on the outer wall of the bolt 303 in a threaded connection while rotating.

[0059] When the lower surface of nut 2047 moves to contact the upper surface of the steel plate, the friction between nut 2047 and the upper surface of the steel plate is insufficient to drive the steel plate to rotate synchronously. However, as nut 2047 continues to rotate downwards, the pressure between nut 2047, bolt 303, and the steel plate gradually increases, causing the friction between bolt 303, nut 2047, and the steel plate to increase synchronously. At this point, bolt 303, driven by the steel plate and nut 2047, abuts against mounting groove 302, causing mounting groove 302 to drive platform 301 to rotate synchronously. Platform 301, through connecting plate 3052, drives linkage plate 3056 to rotate synchronously. The second linkage plate 3056 drives the arc-shaped groove 3057 to rotate synchronously, causing the arc-shaped groove 3057 to abut against the abutment rod 3058. Simultaneously, under the limiting action of the first slide groove 3053, the abutment rod 3058 slides inside the arc-shaped groove 3057 towards the side closer to the first connecting plate 3052. This causes the limiting plate 3059 inside the second slide groove 3054 to slide outwards under the abutment action of the inner wall of the second slide groove 3054, but it does not completely move to the outside of the second slide groove 3054. At the same time, the limiting plate 3059, through the abutment rod 3058, drives the second connecting block 3075 to slide towards the side closer to the annular plate 308, causing the second connecting block 3075 to... 5. The telescopic end of the telescopic rod 3072 retracts, causing the telescopic end of the telescopic rod 3072 to compress the detection spring 3074 through the baffle 3073. This retraction of the detection spring 3074 generates elastic force, which in turn resists the rotation of the connecting plate 3056, reducing the rotation amplitude of the connecting plate 3056. Consequently, the rotation amplitude of the platform 301, driven by the mounting groove 302, is also reduced, resulting in relative movement between the bolt 303 and the nut 2047. This causes the nut 2047 to press against the steel plate and continue moving slowly downwards, further increasing the pressure between the nut 2047 and the steel plate. As the compressive force between the nuts increases again, the compression of the detection spring 3074 also increases as the nut 2047 continues to rotate. This increases the elastic force of the detection spring 3074, which in turn increases the resistance when the platform 301 rotates. Consequently, the bolt 303 and the nut 2047 move relative to each other again, ultimately increasing the compressive force of the nut 2047 on the steel plate. Therefore, the compressive force between the nut 2047 and the steel plate can be reflected by the elastic force of the detection spring 3074 after its contraction. When the elastic force of the detection spring 3074 reaches the preset range, the installation stability between the nut 2047, the bolt 303, and the steel plate is improved.

[0060] The platform 2 301 drives the arc groove 3057 to rotate via the linkage mechanism 304. The contact rod 3058 slides along the arc groove 3057 under the limit of the slide groove 1 3053, pushing the limit plate 3059 to squeeze the telescopic rod 3072 and the detection spring 3074 of the detection component 306. The elastic force generated by the detection spring 3074 forms resistance, suppressing the rotation amplitude of the platform 2 301 and 303, so that the nut 2047 and the bolt 303 move relative to each other, avoiding the situation where the nut 2047 and the bolt 303 rotate together. This solves the problem of insufficient preload and thread damage caused by the bolt 303 rotating together in traditional installation.

[0061] By detecting the positive correlation between the elastic force of spring 3074 and the compressive force of nut 2047 on steel plate, the elastic force is converted into an electrical signal and transmitted to the detection controller 201. When the elastic force reaches the preset range, it reflects that the compressive force and installation stability between nut 2047, bolt 303 and steel plate meet the design requirements, avoiding the traditional manual torque and preventing the problem of insufficient preload leading to loose joints.

[0062] It should be noted that the term "comprises" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article, or apparatus that includes a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprises a ..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0063] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A prefabricated intelligent bolt connection device for steel structures, comprising a base (101), a support frame (102), an arc-shaped plate (103), and a circular groove plate (104), wherein the support frame (102) is fixedly connected to the upper surface of the base (101), the arc-shaped plate (103) is symmetrically fixedly connected to the side wall of the support frame (102), and the circular groove plate (104) is fixedly connected to the upper surface of the base (101), characterized in that, Also includes: The drive mechanism (200) includes a detection controller (201) fixedly connected to the outer wall of the arc plate (103), a platform (202) fixedly connected to the top of the support frame (102), and a connecting component (203) disposed at the bottom of the platform (202); The protective detection mechanism (300) includes a second platform (301) disposed inside the circular groove plate (104), a second mounting groove (302) opened on the top of the second platform (301), a bolt (303) slidably connected inside the second mounting groove (302), a linkage mechanism (304) disposed inside the circular groove plate (104), an annular plate (308) disposed inside the circular groove plate (104), and a detection component (306) disposed inside the circular groove plate (104).

2. The intelligent bolt connection device for prefabricated steel structures according to claim 1, characterized in that: The connecting assembly (203) includes a drive motor (2041) fixedly connected to the top of the platform (202). A telescopic rod (2042) is symmetrically fixedly connected to the side wall of the drive motor (2041). A connecting block (2043) is fixedly connected to the bottom end of the telescopic rod (2042). An annular slide (2044) is fixedly connected to the inner wall of the connecting block (2043). A drive block (2044) is rotatably connected to the outer wall of the annular slide (2044). 45) The drive block (2045) has an installation groove (2046) inside, and a nut (2047) is fixedly connected inside the installation groove (2046). A fixing block (2048) is symmetrically fixedly connected to the upper surface of the platform (301). A telescopic rod (2049) is fixedly connected to the side wall of the fixing block (2048). A clamping block (20410) is fixedly connected to the end of the telescopic rod (2049) away from the fixing block (2048).

3. The intelligent bolt connection device for prefabricated steel structures according to claim 2, characterized in that: The mounting groove (2046) is composed of a circular groove at the top and a hexagonal groove at the bottom. The hexagonal groove can magnetically fix the nut (2047). The drive motor (2041) and the detection controller (201) are electrically connected. The telescopic rod (2042) and the drive motor (2041) are electrically connected.

4. The intelligent bolt connection device for prefabricated steel structures according to claim 2, characterized in that: The telescopic rod (2049) is electrically connected to the detection controller (201), the clamping block (20410) is made of rubber, and the drive block (2045) is electrically connected to the detection controller (201).

5. The intelligent bolt connection device for prefabricated steel structures according to claim 2, characterized in that: The linkage mechanism (304) includes a fixed rod (3051) fixedly connected to the lower surface of the inner cavity of the circular groove plate (104). A connecting plate (3052) is rotatably connected to the top of the fixed rod (3051). A sliding groove (3053) is arranged in a circular array on the lower surface of the inner cavity of the circular groove plate (104). A sliding groove (3054) is arranged in a circular array on the side wall of the inner cavity of the circular groove plate (104). (104) has a sliding groove three (3055) on the inner cavity side wall. The connecting plate one (3052) is fixedly connected to the outer wall of the connecting plate two (3056). The connecting plate two (3056) has an arc-shaped groove (3057) arranged in a ring array inside. The arc-shaped groove (3057) is slidably connected to the inside of the arc-shaped groove (3057). The bottom end of the contact rod (3058) is fixedly connected to a limit plate (3059).

6. The intelligent bolt connection device for prefabricated steel structures according to claim 5, characterized in that: The second platform (301) is rotatably connected inside the third slide (3055), and the first connecting plate (3052) is fixedly connected to the lower surface of the second platform (301).

7. The intelligent bolt connection device for prefabricated steel structures according to claim 5, characterized in that: The annular plate (308) is fixedly connected to the outer wall of the fixed rod (3051), the limiting plate (3059) slides inside the second slide groove (3054), and the bottom end of the abutting rod (3058) slides inside the first slide groove (3053).

8. The intelligent bolt connection device for prefabricated steel structures according to claim 5, characterized in that: The detection component (306) includes a mounting groove three (3071) arranged in a ring array and extending through the interior of the ring plate (308). A telescopic rod three (3072) is fixedly connected inside the mounting groove three (3071). A baffle (3073) is fixedly connected to the telescopic end of the telescopic rod three (3072) away from the ring plate (308). A detection spring (3074) is sleeved on the outer wall of the telescopic end of the telescopic rod three (3072). A connecting block two (3075) is fixedly connected to the end of the telescopic rod three (3072) away from the ring plate (308).

9. The intelligent bolt connection device for prefabricated steel structures according to claim 8, characterized in that: The detection spring (3074) is electrically connected to the detection controller (201), the connecting block two (3075) is fixedly connected to the abutment rod (3058), and the two ends of the detection spring (3074) are fixedly connected to the baffle (3073) and the fixed end of the telescopic rod three (3072), respectively.

10. A method for health monitoring of intelligent bolts in prefabricated steel structures based on any one of claims 1-9, characterized in that, Includes the following steps: Step 1: Install bolts (303) and nuts (2047), and preset the spring force value of the detection spring (3074) and the parameters of the drive motor (2041) through the detection controller (201); Step 2: Drive motor (2041) lowers nut (2047) and rotates. When bolt (303) rotates, linkage mechanism (304) drives arc groove (3057) to rotate. Contact rod (3058) squeezes detection spring (3074) to generate resistance and inhibit rotation. Step 3: The detection spring (3074) converts the spring force value into an electrical signal and transmits it to the detection controller (201). Tightening stops when the preset range is reached. Step 4: Store the tightening data to generate an archive, and verify the installation accuracy by combining the BIM model and 3D scanning; Step 5: Monitor preload fluctuations in real time, issue warnings when exceeding thresholds, predict lifespan based on data, and generate maintenance recommendations.

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