Bolt connection pretension dynamic monitoring device for steel structure
By designing a dynamic monitoring device for bolt connection preload that incorporates sound wave propagation detection, the problem of time-consuming and labor-intensive traditional monitoring methods is solved, enabling real-time and accurate monitoring of bolt connections and improving the applicability and stability of the monitoring device.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG ZHONGNENG ENG TEST
- Filing Date
- 2025-05-19
- Publication Date
- 2026-05-05
AI Technical Summary
Traditional methods for monitoring bolt preload rely on periodic manual inspections, which are time-consuming, labor-intensive, and difficult to reflect changes in bolt preload in real time and accurately, potentially leading to connection failure.
Design a preload dynamic monitoring device including a housing, a sound wave generator, a fixing device, and a sound wave receiver. The device detects bolt signals by propagating sound waves and uses the fixing device and suction cup to ensure stable installation, achieving real-time monitoring without the need for regular manual inspection.
It enables real-time, accurate, and dynamic monitoring of the preload of bolted connections, improving the convenience and applicability of monitoring, reducing labor intensity, and ensuring the stability of the connection.
Smart Images
Figure CN224202627U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of bolt monitoring technology, and in particular relates to a dynamic monitoring device for the preload of bolt connections in steel structures. Background Technology
[0002] In steel structures, components are typically connected via bolts, rivets, or welding to form a structural system. Among these, bolted connections are widely used in critical infrastructure projects such as bridges and industrial plants due to their ease of installation, high strength, and low cost. The preload of bolted connections is a key factor in ensuring the strength and stability of the connection. Improper preload or a gradual decrease in preload during use can lead to connection failure, potentially causing major engineering accidents.
[0003] Traditional methods for monitoring bolt preload rely heavily on manual periodic inspections. This method is not only time-consuming and labor-intensive, but also makes it difficult to reflect changes in bolt preload in real time and accurately. Utility Model Content
[0004] The purpose of this invention is to address the aforementioned technical problems by providing a dynamic monitoring device for the preload of bolted connections in steel structures, which achieves real-time and accurate dynamic monitoring of bolts, thus eliminating the need for regular manual inspections.
[0005] In view of this, the present invention provides a dynamic monitoring device for the preload of bolted connections in steel structures, characterized in that it includes: a housing, wherein a sound wave generator is provided inside the housing, and a threaded cylinder is detachably connected to the lower surface of the housing, wherein the threaded cylinder has an internal thread, and the sound wave generator is axially aligned with the threaded cylinder; it also includes: a fixing device, wherein four sets of fixing devices are provided, and the four sets of fixing devices are circumferentially arranged on the outer wall of the housing; wherein a sound wave receiver is also provided, and the sound wave receiver is arranged on the upper surface of the housing.
[0006] In this technical solution, the threaded cylinder on the lower surface of the housing is threadedly connected to the bolt to be monitored or the corresponding position on the steel structure to ensure a stable installation of the device. Then, the housing is further fixed to the steel structure by four sets of fixing devices to prevent displacement during monitoring. The sound wave generator inside the device is activated to emit sound waves of a certain frequency and intensity. These sound waves propagate along the bolt connection, and the signal from the bolt is detected by the sound wave receiver. The results are obtained from changes in parameters such as wavelength of the external sound wave receiver, eliminating the need for regular inspections by personnel.
[0007] In the above technical solution, further, the outer wall of the threaded cylinder is fitted with an installation ring, and the installation ring and the lower surface of the housing are provided with a threaded hole, and a locking element is threadedly connected to the threaded hole.
[0008] In this technical solution, the threaded cylinder can be disassembled by the locking element and the threaded hole, so as to replace the threaded cylinder to monitor bolts of different diameters, thereby improving the applicability of the monitoring device.
[0009] In the above technical solution, the lower surface of the housing is provided with a circumferential groove, and the outer wall of the threaded cylinder is provided with a slider that matches the groove.
[0010] In this technical solution, the sliding block and the groove enable the threaded cylinder and the mounting ring on the outer wall of the threaded cylinder to be accurately installed on the housing, so that the threaded cylinder and the threaded hole on the lower surface of the housing correspond.
[0011] Furthermore, in the above technical solution, grips are symmetrically provided on the upper surface of the housing.
[0012] In this technical solution, the operator can easily screw the monitoring device onto the bolt to be tested by using the grip lever.
[0013] In the above technical solution, the fixing device further includes: a fixing shell, a rotating cylinder rotatably connected inside the fixing shell, a rotating shaft fixed at the upper end of the rotating cylinder, and a turntable connected to the rotating shaft through the fixing shell. A threaded rod is threadedly connected inside the rotating cylinder, and a suction cup is fixedly connected to the end of the threaded rod away from the rotating cylinder. The bottom of the fixing shell is provided with a groove for the suction cup.
[0014] In this technical solution, the operator rotates the turntable to drive the rotating drum to rotate, based on the actual condition of the steel structure surface. Due to the threaded connection between the rotating drum and the threaded rod, the rotation of the drum will cause the threaded rod to move axially, thereby adjusting the position of the suction cup and making the suction cup adhere and fix to the steel structure surface. This allows the entire monitoring device to be stably installed on the steel structure. If it is necessary to adjust the position of the monitoring device or perform maintenance, the suction force of the suction cup can be released by rotating the turntable in the opposite direction.
[0015] In the above technical solution, furthermore, a bearing is provided inside the fixed shell, and the rotating drum is sleeved inside the bearing. The main function of the bearing is to reduce friction and resistance during the rotation of the drum, facilitating its rotation and thus reducing the labor intensity of the workers.
[0016] The beneficial effects of this utility model are:
[0017] 1. Connect the threaded cylinder on the lower surface of the housing to the bolt or corresponding position on the steel structure to be monitored, ensuring a stable installation. Then, further secure the housing to the steel structure using four sets of fixing devices to prevent displacement during monitoring. Activate the sound wave generator inside the device to emit sound waves of a certain frequency and intensity. These sound waves will propagate along the bolt connection, and the signal from the bolt will be detected by the sound wave receiver. The monitoring results can be obtained from changes in parameters such as wavelength of the external sound wave receiver, eliminating the need for regular inspections by personnel.
[0018] 2. Based on the actual conditions of the steel structure surface, rotate the turntable to drive the rotating drum to rotate. Due to the threaded connection between the rotating drum and the threaded rod, the rotation of the drum will cause the threaded rod to move axially, thereby adjusting the position of the suction cup and making the suction cup adhere and fix to the steel structure surface. This allows the entire monitoring device to be stably installed on the steel structure. If it is necessary to adjust the position of the monitoring device or perform maintenance, the suction force of the suction cup can be released by rotating the turntable in the opposite direction. Attached Figure Description
[0019] Figure 1 This is a structural schematic diagram of a dynamic monitoring device for pretension of bolted connections in steel structures according to this utility model;
[0020] Figure 2 This is a cross-sectional view of a dynamic monitoring device for preload of bolted connections in steel structures according to this utility model.
[0021] Figure 3 This is an anatomical diagram of a dynamic monitoring device for preload of bolted connections in steel structures according to this utility model.
[0022] Figure 4 This is an anatomical diagram of a dynamic monitoring device for preload of bolted connections in steel structures according to this utility model.
[0023] The markings in the diagram are as follows:
[0024] 1. Housing; 2. Threaded cylinder; 3. Fixing device; 301. Fixed housing; 302. Rotary cylinder; 303. Threaded rod; 304. Rotating shaft; 305. Turntable; 306. Suction cup; 307. Bearing; 308. Through groove; 4. Sound wave receiver; 5. Handle; 6. Internal thread; 7. Sound wave generator; 8. Mounting ring; 9. Locking element; 10. Slider; 11. Slide groove; 12. Threaded hole. Detailed Implementation
[0025] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.
[0026] In the description of this application, it should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. For ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.
[0027] It should be noted that the terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and are not limited in number; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.
[0028] It should be noted that in the description of this application, the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this application. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.
[0029] It should be noted that, in this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.
[0030] Example 1:
[0031] Depend on Figure 1-4 As shown, this embodiment provides a dynamic monitoring device for the preload of bolted connections in steel structures, comprising: a housing 1, inside which is a sound wave generator 7; a threaded cylinder 2 detachably connected to the lower surface of the housing 1, the threaded cylinder 2 having an internal thread 6; the sound wave generator 7 and the threaded cylinder 2 being axially aligned; and a fixing device 3, comprising four sets of fixing devices 3 arranged circumferentially on the outer wall of the housing 1. A sound wave receiver 4 is also provided, located on the upper surface of the housing 1. The threaded cylinder 2 on the lower surface of the housing 1 is threadedly connected to the bolt to be monitored or to a corresponding position on the steel structure to ensure stable installation. Then, the housing 1 is further fixed to the steel structure by the four sets of fixing devices 3 to prevent displacement during monitoring. The sound wave generator 7 inside the device is activated to emit sound waves of a certain frequency and intensity. These sound waves propagate along the bolt connection, and the signal from the bolt is detected by the sound wave receiver 4. The monitoring is based on changes in parameters such as wavelength observed by the external sound wave receiver 4, eliminating the need for regular inspections by personnel.
[0032] Furthermore, an installation ring 8 is fitted onto the outer wall of the threaded cylinder 2. The installation ring 8 and the lower surface of the housing 1 share a threaded hole 12. A locking element 9 is connected to the threaded hole 12 via an internal thread 6. Under the action of the locking element 9 and the threaded hole 12, the threaded cylinder 2 can be disassembled to accommodate bolts of different diameters, thereby allowing for replacement of the threaded cylinder 2 and improving the applicability of the monitoring device.
[0033] Furthermore, the lower surface of the housing 1 is provided with a circumferential groove 11, and the outer wall of the threaded cylinder 2 is provided with a slider 10 that matches the groove 11. Under the action of the slider 10 and the groove 11, the threaded cylinder 2 and the mounting ring 8 on the outer wall of the threaded cylinder 2 are accurately installed on the housing 1, so that the threaded cylinder 2 and the threaded hole 12 on the lower surface of the housing 1 correspond.
[0034] Furthermore, the upper surface of the housing 1 is symmetrically provided with grips 5. With the help of the grips 5, the operator can easily screw the monitoring device onto the bolt to be tested.
[0035] Furthermore, the fixing device 3 includes: a fixing shell 301, a rotating cylinder 302 rotatably connected inside the fixing shell 301, a rotating shaft 304 fixed at the upper end of the rotating cylinder 302, and a turntable 305 connected to the rotating shaft 304 through the fixing shell 301. A threaded rod 303 is threadedly connected inside the rotating cylinder 302, and a suction cup 306 is fixedly connected to the end of the threaded rod 303 away from the rotating cylinder 302. The bottom of the fixing shell 301 is provided with a through groove 308 for the suction cup 306. According to the actual situation of the steel structure surface, the staff rotates the turntable 305 to drive the rotating drum 302 to rotate. Due to the threaded connection between the rotating drum 302 and the threaded rod 303, the rotation of the rotating drum 302 will cause the threaded rod 303 to move axially, thereby adjusting the position of the suction cup 306, so that the suction cup 306 is attached and fixed to the steel structure surface, thus making the entire monitoring device securely installed on the steel structure. If it is necessary to adjust the position of the monitoring device or perform maintenance, the suction force of the suction cup 306 can be released by rotating the turntable 305 in the opposite direction.
[0036] Furthermore, a bearing 307 is provided inside the fixed shell 301, and the rotating drum 302 is sleeved inside the bearing 307. The main function of the bearing 307 is to reduce the friction and resistance of the rotating drum 302 during rotation, so as to facilitate the rotation of the rotating drum 302 and thus reduce the labor intensity of the workers.
[0037] The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.
Claims
1. A dynamic monitoring device for preload of bolted connections in steel structures, characterized in that, include: The housing (1) is equipped with a sound wave generator (7) inside the housing (1). A threaded cylinder (2) is detachably connected to the lower surface of the housing (1). The threaded cylinder (2) is equipped with an internal thread (6). The sound wave generator (7) and the threaded cylinder (2) are axially aligned. The housing (1) also includes a fixing device (3). The fixing device (3) is provided in four sets. The four sets of fixing devices (3) are circumferentially arranged on the outer wall of the housing (1). A sound wave receiver (4) is also provided. The sound wave receiver (4) is arranged on the upper surface of the housing (1).
2. The dynamic monitoring device for preload of bolted connections in steel structures according to claim 1, characterized in that: The outer wall of the threaded cylinder (2) is fitted with an installation ring (8), and the installation ring (8) and the lower surface of the housing (1) are provided with a threaded hole (12), and the threaded hole (12) is connected to a locking member (9) by an internal thread (6).
3. The dynamic monitoring device for preload of bolted connections in steel structures according to claim 2, characterized in that: The lower surface of the housing (1) is provided with a circumferential groove (11), and the outer wall of the threaded cylinder (2) is provided with a slider (10) that is adapted to the groove (11).
4. The dynamic monitoring device for preload of bolted connections in steel structures according to claim 3, characterized in that: The upper surface of the housing (1) is symmetrically provided with grips (5).
5. The dynamic monitoring device for preload of bolted connections in steel structures according to claim 1, characterized in that: The fixing device (3) includes: a fixing shell (301), a rotating cylinder (302) is rotatably connected inside the fixing shell (301), a rotating shaft (304) is fixed at the upper end of the rotating cylinder (302), the rotating shaft (304) passes through the fixing shell (301) and is connected to a turntable (305), a threaded rod (303) is threadedly connected inside the rotating cylinder (302), a suction cup (306) is fixedly connected at the end of the threaded rod (303) away from the rotating cylinder (302), and a through groove (308) for the suction cup (306) is provided at the bottom of the fixing shell (301).
6. The dynamic monitoring device for preload of bolted connections in steel structures according to claim 5, characterized in that: The fixed housing (301) is equipped with a bearing (307).