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CN-117782372-B - Underwater steel structure stress detection equipment and detection method

CN117782372BCN 117782372 BCN117782372 BCN 117782372BCN-117782372-B

Abstract

The invention relates to the technical field of stress detection, in particular to an underwater steel structure stress detection device and a detection method, wherein the device comprises a mounting shell, a mounting seat, a rotating shaft, a fixing frame and a telescopic mechanism; the fixing frame is connected with the surface of the mounting seat, the rotating shafts are all rotationally connected with the fixing frame, the rotating shafts are provided with moving wheels, the fixing frame is provided with a first driving assembly, the mounting seat is provided with a clamping mechanism, the mounting shell is connected with the mounting seat, the mounting shell is provided with a control mechanism, the control mechanism is provided with a stress detector, the telescopic mechanism is connected with the mounting seat, the control mechanism is in control connection with the clamping mechanism, the telescopic mechanism and the first driving assembly, the stress detector is provided with a strain gauge, and the strain gauge is connected with the telescopic mechanism. According to the invention, the first driving component drives the rotating shaft and the moving wheel to rotate, the rollers in the moving wheel and the clamping mechanism are pressed on the surface of the steel structure main body, the detection equipment can move along the steel structure main body when the moving wheel rotates, the detection equipment moves to an underwater detection position, and the stress detection position is adjusted at the same time, so that the device is more convenient and flexible to use.

Inventors

  • TONG BO
  • ZHAO YONG
  • GAO CHEN
  • ZHANG LIHUI
  • SONG ZICHEN

Assignees

  • 西安热工研究院有限公司

Dates

Publication Date
20260512
Application Date
20240201

Claims (9)

  1. 1. The underwater steel structure stress detection device is characterized by comprising a mounting seat (2), wherein two sides of the mounting seat (2) are respectively connected with clamping mechanisms, the two clamping mechanisms are symmetrically arranged relative to the vertical central plane of the mounting seat (2), and the two clamping mechanisms and the mounting seat (2) clamp a steel structure main body (23) together; The inner side surface of the mounting seat (2) is provided with two vertical fixing frames (7), two rotating shafts (5) are arranged between the two fixing frames (7), the two rotating shafts (5) are arranged up and down, the end parts of the rotating shafts (5) are rotationally connected with the fixing frames (7), the rotating shafts (5) are perpendicular to the length direction of the steel structure main body (23), a first driving component (21) for driving the rotating shafts (5) to rotate is arranged in each fixing frame (7), and a plurality of coaxial moving wheels (6) are fixedly arranged on each rotating shaft (5); The outer side surface of the mounting seat (2) is provided with a control mechanism (22) and two telescopic mechanisms (20), the control mechanism (22) and the telescopic mechanisms (20) are arranged in the mounting shell (1), the mounting shell (1) is fixedly mounted on the mounting seat (2), the telescopic ends of the two telescopic mechanisms (20) penetrate through the mounting seat (2), the end surfaces of the telescopic ends of the telescopic mechanisms (20) are provided with strain gauges (10), the control mechanism (22) is internally provided with a stress detector, and the strain gauges (10) are electrically connected with the stress detector; the control mechanism (22) is simultaneously connected with the first driving component, the telescopic mechanism (20) and the clamping mechanism in an electric signal manner; during stress detection, the strain gauge (10), the movable wheel (6) and the clamping mechanism are attached to the outer side wall of the steel structure main body (23); the clamping mechanism comprises a mounting tube (3), a sliding tube (4), a second driving assembly and a clamping plate (8); The two sides of the mounting seat (2) are respectively connected with a mounting tube (3), the mounting tubes (3) are perpendicular to the mounting seat (2), the inner peripheral surface of each mounting tube (3) is connected with the outer peripheral surface of a sliding tube (4) in a sliding manner, the sliding tubes (4) are driven by a screw rod sliding block mechanism, the end parts of the screw rod sliding block mechanism are connected with a second driving assembly, and the second driving assembly is arranged on the mounting seat (2); the sliding tube (4) can slide to protrude out of the outer end surface of the mounting tube (3), and the outer end part of the sliding tube (4) is rotationally connected with the clamping plate (8); the upper end face of the outer end of the sliding pipe (4) and the clamping plate (8) are provided with positioning holes (13), and the limit bolts (9) are inserted into the two positioning holes (13); The clamping plate (8) is provided with a plurality of rollers (11).
  2. 2. An underwater steel structure stress detection apparatus as claimed in claim 1, wherein the second driving assembly is provided on an outer side wall of the mounting base (2), the screw slider mechanism comprises a screw (12) and a slider (19), and the inner end of the sliding tube (4) is provided with a fixing plate (18); The lead screw (12) passes through the fixed plate (18) and the mounting seat (2), the lead screw (12) is rotationally connected with the fixed plate (18), the lead screw (12) is rotationally connected with the mounting seat (2), and the lead screw (12) passes through the end part of the mounting seat (2) and is in transmission connection with the second driving component.
  3. 3. An underwater steel structure stress detection apparatus as claimed in claim 1, characterized in that the second drive assembly is provided in a protective housing (16), the protective housing (16) being mounted on the mounting base (2).
  4. 4. An underwater steel structure stress detection apparatus as claimed in claim 1, wherein the outer end portion of the installation tube (3) is provided with a sealing portion (24), and the sealing portion (24) presses the outer peripheral surface of the sliding tube (4).
  5. 5. An underwater steel structure stress detection apparatus as claimed in claim 1, characterized in that the limit bolts (9) are screwed with two locating holes (13).
  6. 6. An underwater steel structure stress detection apparatus as claimed in claim 1, wherein the outer surface of the roller (11) protrudes beyond the clamping plate (8), and the axis of the roller (11) is perpendicular to the length direction of the steel structure body (23).
  7. 7. The underwater steel structure stress detection device according to claim 1 is characterized in that a flange (14) is arranged on the periphery of the installation shell (1), the flange (14) is in threaded connection with the installation base (2) through a plurality of installation bolts (15), and a sealing ring is arranged between the flange (14) and the installation shell (1).
  8. 8. A stress detection method using the underwater steel structure stress detection apparatus as claimed in any one of claims 1 to 7, comprising the steps of: S1, installing stress detection equipment on a steel structure main body (23), and clamping the surface of the steel structure main body (23) by a clamping mechanism; s2, a control mechanism (22) controls a first driving assembly (21) to start, two rotating shafts (5) are driven to rotate, the rotating shafts (5) drive a moving wheel (6) to rotate, and the moving wheel (6) drives detection equipment to move on a steel structure main body (23); s3, the detection equipment moves to a set position, the control mechanism controls the telescopic mechanism (20) to press the strain gauge (10) on the surface of the steel structure main body (23), and the stress monitor measures the stress of the steel structure main body (23); S4, after the measurement is finished, the control mechanism (22) controls the telescopic mechanism (20) to shrink, and simultaneously drives the strain gauge (10) to be far away from the steel structure main body (23); s5, repeating the steps S2-S4 until the measurement of all the set positions is finished.
  9. 9. The stress detection method according to claim 8, wherein in S1, in the process of tightening the surface of the steel structure main body (23) by the clamping mechanism, the clamping plate (8) rotates towards the steel structure main body (23), and the sliding tube (4) and the clamping plate (8) are positioned by the limit bolt (9); And S2, when the detection equipment moves, the roller (11) rotates.

Description

Underwater steel structure stress detection equipment and detection method Technical Field The invention belongs to the technical field of stress detection, and relates to underwater steel structure stress detection equipment and a detection method. Background When an object is deformed due to external stress, humidity, temperature field change, etc., an internal force of interaction is generated between parts in the object, and the internal force per unit area is called stress. Stress may cause cracking, buckling or deformation of the object and further induce safety accidents, so that it is necessary to perform stress detection on the object. For large-scale steel structure bridges, gates, steel structure roofs and other truss structures, besides the stress detection of assembled structural members in the production process, the stress detection is required to be carried out after the assembly and in the use process so as to ensure the safety and the reliability, thereby avoiding the occurrence of safety accidents. The Chinese patent with the publication number of CN116295977A discloses an underwater steel structure stress detection device, which comprises a stainless steel shell, a mobile power supply, a stress acquisition and emission module, a control assembly and a plurality of strain gauge groups, wherein the stress acquisition and emission module is fixed on a fixed frame in the stainless steel shell, the mobile power supply is clamped in the stainless steel shell through the fixed frame and is electrically connected with the stress acquisition and emission module and the control assembly, the plurality of strain gauge groups are glued at different points of a steel structure, the stress acquisition and emission module is electrically connected with each strain gauge group to form a stress monitoring system, each strain gauge group comprises a compensation strain gauge for temperature compensation and a working strain gauge for acquiring a stress strain value, waterproof curing glue is smeared on each compensation strain gauge and each working strain gauge, and each temperature compensation strain gauge and each working strain gauge are covered with a protective cover. The stress detection device can effectively solve the problem of stress monitoring of the stress detection of the underwater large-scale rotating steel structure, and realizes tracking and monitoring in the running process of equipment. The detection device is required to be installed at the detection position in the steel structure stress detection device, so that the strain gauge can carry out stress detection on the steel structure, but the detection device can only be fixedly installed at a fixed position of the steel structure, and when other positions are required to be detected, the installation position is required to be manually replaced, so that the underwater operation is inconvenient to use. Disclosure of Invention The invention aims to overcome the defects of the prior art, and provides an underwater steel structure stress detection device and an underwater steel structure stress detection method, so as to solve the problem that the existing steel structure stress detection device can only be installed at a fixed position to detect a fixed position. In order to achieve the purpose, the invention is realized by adopting the following technical scheme: the utility model provides an underwater steel structure stress detection equipment, includes the mount pad, the both sides of mount pad are connected with fixture respectively, and two fixture set up for the vertical central plane symmetry of mount pad, and two fixture and mount pad clamp steel structure main part jointly The inner side surface of the mounting seat is provided with two vertical fixing frames, two rotating shafts are arranged between the two fixing frames, the two rotating shafts are arranged up and down, the end parts of the rotating shafts are rotationally connected with the fixing frames, the rotating shafts are perpendicular to the length direction of the steel structure main body, a first driving assembly for driving the rotating shafts to rotate is arranged in each fixing frame, and a plurality of coaxial moving wheels are fixedly arranged on each rotating shaft. The outer side surface of the mounting seat is provided with a control mechanism and two telescopic mechanisms, the control mechanism and the telescopic mechanisms are arranged in the mounting shell, and the mounting shell is fixedly arranged on the mounting seat; the control mechanism is simultaneously connected with the first driving assembly, the telescopic mechanism and the clamping mechanism in an electric signal manner; During stress detection, the strain gauge, the movable wheels and the clamping mechanism are attached to the outer side wall of the steel structure main body. The invention further improves that: preferably, the clamping mechanism comprises a mounting tube, a sliding tube,