CN-224202627-U - Dynamic monitoring device for pre-tensioning force of bolt connection for steel structure

Abstract

The utility model belongs to the technical field of bolt monitoring, and particularly relates to a dynamic monitoring device for a bolt connection pretension force for a steel structure, which comprises a shell, wherein an acoustic wave generator is arranged in the shell, a threaded cylinder is detachably connected to the lower surface of the shell, internal threads are arranged in the threaded cylinder, the acoustic wave generator and the threaded cylinder are arranged in the threaded cylinder, the dynamic monitoring device further comprises four groups of fixing devices, the four groups of fixing devices are circumferentially arranged on the outer wall of the shell, and an acoustic wave receiver is further arranged on the upper surface of the shell, so that the real-time accurate dynamic monitoring of bolts is achieved, and manual periodic inspection is not needed.

Inventors

• WU WENHAO
• YU JUFENG
• MAO XIAODONG
• SONG XINPING
• YU JIAMIN
• ZHAO WEI

Assignees

• 浙江中能工程检测有限公司

Dates

Publication Date

20260505

Application Date

20250519

Claims (6)

1. 1. The utility model provides a steel construction is with bolted connection pretension dynamic monitoring device, its characterized in that includes casing (1), casing (1) inside is equipped with sound wave generator (7), casing (1) lower surface detachably is connected with screw thread section of thick bamboo (2), screw thread section of thick bamboo (2) inside is equipped with internal thread (6), sound wave generator (7) set up with screw thread section of thick bamboo (2) axle center, still include fixing device (3), fixing device (3) are equipped with four groups, four groups fixing device (3) circumference sets up at casing (1) outer wall, wherein, still is provided with sound wave receiver (4), sound wave receiver (4) set up at casing (1) upper surface.
2. 2. The dynamic monitoring device for the bolted pretension of the steel structure is characterized in that a mounting ring (8) is sleeved on the outer wall of the threaded cylinder (2), a threaded hole (12) is formed in the joint of the mounting ring (8) and the lower surface of the shell (1), and a locking piece (9) is connected to an internal thread (6) of the threaded hole (12).
3. 3. The dynamic monitoring device for the bolted pretension of the steel structure is characterized in that a sliding groove (11) is formed in the circumference of the lower surface of the shell (1), and a sliding block (10) matched with the sliding groove (11) is arranged on the outer wall of the threaded cylinder (2).
4. 4. A dynamic monitoring device for the pre-tension of the steel structure by the bolt connection according to claim 3 is characterized in that holding rods (5) are symmetrically arranged on the upper surface of the shell (1).
5. 5. The device for dynamically monitoring the pretension of the steel structure by means of the bolt connection of claim 1, wherein the fixing device (3) comprises a fixing shell (301), a rotary drum (302) is rotatably connected inside the fixing shell (301), a rotary shaft (304) is fixed at the upper end of the rotary drum (302), the rotary shaft (304) penetrates through the fixing shell (301) to be connected with a rotary table (305), a threaded rod (303) is connected inside the rotary drum (302) in a threaded mode, a sucker (306) is fixedly connected to one end, far away from the rotary drum (302), of the threaded rod (303), and a through groove (308) for the sucker (306) is formed in the bottom of the fixing shell (301).
6. 6. A dynamic monitoring device for the bolting pretension of steel structures according to claim 5, characterized in that bearings (307) are provided inside the stationary housing (301).

Description

Dynamic monitoring device for pre-tensioning force of bolt connection for steel structure Technical Field The utility model belongs to the technical field of bolt monitoring, and particularly relates to a dynamic monitoring device for the pretension of bolt connection for a steel structure. Background The components in the steel structure generally form a structural system through bolt connection, rivet connection or welding and the like, wherein the bolt connection is widely applied to key infrastructures such as bridges, industrial plants and the like due to the characteristics of convenience in installation, high strength, low cost and the like, and the pretension of the bolt connection is a key factor for ensuring the connection strength and stability. Improper pretension or gradual decrease during use may result in connection failure, which may lead to major engineering accidents. The traditional method for monitoring the pretension of the bolt connection is mostly dependent on manual periodic inspection, and the method is time-consuming and labor-consuming, and is difficult to accurately reflect the change of the pretension of the bolt in real time. Disclosure of utility model The utility model aims to solve the technical problems, and provides a dynamic monitoring device for the pretension of the bolt connection for the steel structure, which achieves real-time and accurate dynamic monitoring of the bolt, so that manual regular inspection is not needed. The utility model provides a dynamic monitoring device for the pre-tension force of a steel structure by using a bolt connection, which is characterized by comprising a shell, wherein an acoustic wave generator is arranged in the shell, a threaded cylinder is detachably connected to the lower surface of the shell, internal threads are arranged in the threaded cylinder, the acoustic wave generator and the threaded cylinder are axially arranged, and the dynamic monitoring device also comprises four groups of fixing devices, wherein the four groups of fixing devices are circumferentially arranged on the outer wall of the shell, and an acoustic wave receiver is also arranged on the upper surface of the shell. In the technical scheme, the threaded cylinder on the lower surface of the shell is in threaded connection with the corresponding position on the bolt or the steel structure to be monitored, so that the device is ensured to be stably installed. Then, the shell is further fixed on the steel structure through four groups of fixing devices, displacement is prevented in the monitoring process, the sound wave generator in the device is started, sound waves with certain frequency and intensity are emitted, the sound waves can propagate along the bolt connection part, signals of the bolts are detected through the sound wave receiver, and judgment is carried out from parameter changes such as the wavelength of the external sound wave receiver, and the like, so that periodic inspection by workers is not needed. In the above technical scheme, further, screw thread section of thick bamboo outer wall cover is equipped with the collar, the screw hole has been seted up jointly with the casing lower surface to the collar, threaded hole threaded connection has the retaining member. In this technical scheme, can dismantle the screw thread section of thick bamboo under retaining member and screw hole's effect to the reply monitoring different diameter's bolt, change the screw thread section of thick bamboo, improve monitoring devices's suitability. In the above technical scheme, further, the casing lower surface circumference is equipped with the spout, screw thread section of thick bamboo outer wall is equipped with the slider with spout looks adaptation. In this technical scheme, under the effect of slider and spout for the installation of screw thread section of thick bamboo and screw thread section of thick bamboo outer wall is accurate installs on the casing, makes screw thread section of thick bamboo and the screw hole of casing lower surface correspond. In the above technical scheme, further, the upper surface of the shell is symmetrically provided with holding rods. In this technical scheme, under the effect of holding rod, the staff can be convenient with monitoring devices screw in wait to detect on the bolt. In the technical scheme, the fixing device further comprises a fixing shell, a rotary drum is rotatably connected inside the fixing shell, a rotating shaft is fixed at the upper end of the rotary drum, and a rotary disc penetrates through the fixing shell and is connected with the rotary disc. The inside threaded connection of rotary drum has the threaded rod, threaded rod keeps away from rotary drum one end fixedly connected with sucking disc, the fixed shell bottom is equipped with supplies the sucking disc to lead to the groove. In this technical scheme, the staff, according to the actual conditions on steel construction surface, rotatory carousel is