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CN-122014535-A - Fan tower tube flange joint looseness monitoring device

CN122014535ACN 122014535 ACN122014535 ACN 122014535ACN-122014535-A

Abstract

The invention relates to the technical field of fan tower cylinders, in particular to a device for monitoring looseness at a flange joint of a fan tower cylinder, which comprises a foundation, a lower tower cylinder and an upper tower cylinder, wherein a flange plate and a connecting base plate are arranged between the lower tower cylinder and the upper tower cylinder, a ball cavity is formed in the connecting base plate, balls are arranged in the ball cavity, the ball cavity is communicated with a first mounting hole and a second mounting hole, an axial sensor is arranged in the first mounting hole, a radial sensor is arranged in the second mounting hole, a spring is extruded to be in a compressed state in a normal state, a stable elastic force is applied to a pressing plate to enable the pressure sensor to monitor the reference pressure, when looseness of bolts between the flange plates is generated and separated, the pressure between two groups of connecting base plates is reduced, the elastic force is released by the spring, and the pressing plate moves, so that the reference pressure monitored by the pressure sensor changes to reflect whether looseness occurs or not, and key data are provided for looseness early warning.

Inventors

  • ZHOU CHUANG
  • FU TENG
  • ZHENG FEI
  • CHEN XIAOLI
  • LIN CHUNYU
  • GUO BO
  • Xu Mobei
  • WANG JUNBO
  • LIANG CHEN

Assignees

  • 中电投东北能源科技有限公司
  • 中电投东北新能源发展有限公司

Dates

Publication Date
20260512
Application Date
20260310

Claims (9)

  1. 1. The device for monitoring the looseness of the flange joint of the fan tower barrel is characterized by comprising a foundation (1), wherein a lower tower barrel (2) is arranged on the foundation (1), and an upper tower barrel (3) is arranged at the top of the lower tower barrel (2); A group of flange plates (4) are respectively arranged at the top end of the lower tower cylinder (2) and the bottom end of the upper tower cylinder (3), connecting base plates (5) are respectively arranged at one sides of the two groups of flange plates (4) which are opposite to each other, the connecting base plates (5) of the same group are fixedly connected with the flange plates (4) through bolts (401) and nuts (402), and a data collector (10) is further arranged on the inner wall of the lower tower cylinder (2); The inside of connecting backing plate (5) is offered the symmetry and is set up ball chamber (6) of bolt (401) both sides be equipped with ball (601) in ball chamber (6), ball chamber (6) are in simultaneously the inside intercommunication of connecting backing plate (5) has first mounting hole (7) and second mounting hole (8), first mounting hole (7) orientation lower tower section of thick bamboo (2) with the axle center of last tower section of thick bamboo (3), second mounting hole (8) orientation the side of connecting backing plate (5) and with the direction of first mounting hole (7) is mutually perpendicular be equipped with axial sensor (701) in first mounting hole (7) be equipped with radial sensor (801) in second mounting hole (8), ball (601) can with axial sensor (701) with radial sensor (801) contact.
  2. 2. The device for monitoring the looseness of the flange connection part of the fan tower according to claim 1, wherein the vertical section of the connecting base plate (5) is L-shaped, the two inner side surfaces of the connecting base plate (5) respectively cover the top surface and the inner side surface of the flange plate (4), and the two groups of connecting base plates (5) form a C shape together; Vertical connecting grooves (501) symmetrically arranged on two sides of the bolt (401) are further formed in the connecting base plate (5), springs (502) are arranged in the upper connecting groove (501) and the lower connecting groove (501) which are positioned at the same horizontal position, and pressing plates (503) capable of sliding in the connecting grooves (501) are respectively arranged at the upper end and the lower end of the springs (502).
  3. 3. The fan tower flange connection looseness monitoring device according to claim 2, wherein a pressure sensor (504) contacting with the pressing plate (503) is arranged in the connecting groove (501), and the pressure sensor (504) is located on the other side of the corresponding pressing plate (503) relative to the spring (502).
  4. 4. The fan tower flange connection looseness monitoring device according to claim 3, wherein the pressure sensor (504), the axial sensor (701) and the radial sensor (801) are electrically connected with the data collector (10) through wires, and the data collector (10) is internally provided with a wireless transmission module and is connected with a remote monitoring terminal.
  5. 5. The fan tower flange connection loosening monitoring device according to claim 2, wherein the left side surface, the right side surface and the inner side surface of the connecting base plate (5) are respectively provided with threading holes (9) symmetrical relative to the bolts (401), the two threading holes (9) positioned on the same side are communicated through the first mounting hole (7), the ball cavity (6) and the second mounting hole (8), and the threading holes (9) are provided with waterproof joints (901) at the end parts.
  6. 6. The device for monitoring the looseness of the flange connection of the fan tower according to claim 1, wherein the ball cavity (6) is a hemispherical groove, and the balls (601) protrude from the connecting base plate (5) and are in contact with the flange plate (4).
  7. 7. The fan tower flange connection looseness monitoring device according to claim 1, wherein the monitoring ends of the axial sensor (701) and the radial sensor (801) are all arc-shaped and are in contact with the balls (601).
  8. 8. The fan tower flange connection looseness monitoring device according to claim 1, wherein the detection end of the axial sensor (701) faces towards the central axes of the lower tower (2) and the upper tower (3), and the detection end of the radial sensor (801) is perpendicular to the detection end of the axial sensor (701).
  9. 9. The device for monitoring the looseness of the flange connection of the fan tower according to claim 1, wherein a plurality of groups of reinforcing rods (101) are distributed between the foundation (1) and the lower tower (2) at equal intervals.

Description

Fan tower tube flange joint looseness monitoring device Technical Field The invention relates to the technical field of fan tower barrels, in particular to a device for monitoring looseness of a flange joint of a fan tower barrel. Background With the rapid development of wind power generation, the land medium and high wind speed areas are completely developed, and the low wind speed (4.5 m/s-6.5 m/s) resources in the eastern and south areas of China are rich in reserves, the development amount can reach 10 hundred million kW.h, and the method is close to the power grid load center, and has huge development potential. However, the wind turbine generator in the low wind speed region needs a higher tower drum to obtain a larger wind speed and promote the generated energy, which forces the building height of the wind turbine tower drum in the low wind speed region to be continuously increased, and the height of the wind turbine tower drum in the low wind speed region in the middle east and south of China is increased to 160m level. The existing tower is exposed in natural environment for a long time, particularly under severe conditions such as humidity, salt fog and the like, the steel surface is easy to corrode, so that the wall thickness of the tower is reduced, the bearing capacity of the tower is reduced, and as the height of the tower body is higher, the blower is higher, high-speed wind is easier to catch, the stability of the tower is reduced, and huge potential safety hazards exist. Disclosure of Invention Aiming at the problems existing in the prior art, the invention aims to provide a loosening monitoring device for a flange joint of a fan tower. In order to solve the problems, the technical scheme adopted by the invention is as follows: A loose monitoring device for a flange joint of a fan tower cylinder comprises a foundation, wherein a lower tower cylinder is arranged on the foundation, and an upper tower cylinder is arranged at the top of the lower tower cylinder; A group of flange plates are respectively arranged at the top end of the lower tower barrel and the bottom end of the upper tower barrel, connecting base plates are respectively arranged at one sides of the two groups of flange plates, which are away from each other, the connecting base plates of the same group are fixedly connected with the flange plates through bolts and nuts, and a data collector is also arranged on the inner wall of the lower tower barrel; The inside of connecting the backing plate is offered the symmetry and is set up the ball chamber of bolt both sides be equipped with the ball in the ball chamber, the ball chamber is in simultaneously the inside intercommunication of connecting the backing plate has first mounting hole and second mounting hole, first mounting hole orientation lower tower section of thick bamboo with go up the axle center of tower section of thick bamboo, the second mounting hole orientation connect the side of backing plate and with the direction of first mounting hole is mutually perpendicular be equipped with axial sensor in the first mounting hole be equipped with radial sensor in the second mounting hole, the ball can with axial sensor with radial sensor contacts. Further, the vertical section of the connecting backing plate is L-shaped, the two inner side surfaces of the connecting backing plate respectively cover the top surface and the inner side surface of the flange plate partially, and the two groups of connecting backing plates form a C shape together; The connecting backing plate is also provided with vertical connecting grooves symmetrically arranged on two sides of the bolt, springs are arranged in the upper group of connecting grooves and the lower group of connecting grooves which are positioned at the same horizontal position, and pressing plates capable of sliding in the connecting grooves are respectively arranged at the upper end and the lower end of each spring. Further, a pressure sensor contacting with the pressing plate is arranged in the connecting groove, and the pressure sensor is simultaneously positioned on the other side of the corresponding pressing plate relative to the spring. Further, the pressure sensor, the axial sensor and the radial sensor are electrically connected with a data acquisition unit through wires, and the data acquisition unit is internally provided with a wireless transmission module and is connected with a remote monitoring terminal. Further, the left side surface, the right side surface and the inner side surface of the connecting backing plate are respectively provided with threading holes which are symmetrical relative to the bolts, the two threading holes positioned on the same side are communicated through the first mounting holes, the ball cavities and the second mounting holes, and the threading holes are provided with waterproof joints at the end parts. Further, the ball cavity is a hemispherical groove, and the balls protrude out of the