CN216645814U

CN216645814U - Flange bolt looseness fracture monitoring system

Info

Publication number: CN216645814U
Application number: CN202122991316.XU
Authority: CN
Inventors: 舒忠虎; 黄小清; 周伟强; 黄平
Original assignee: Longyuan Jiangyong Wind Power Generation Co Ltd
Current assignee: Longyuan Jiangyong Wind Power Generation Co Ltd
Priority date: 2021-12-01
Filing date: 2021-12-01
Publication date: 2022-05-31
Anticipated expiration: 2031-12-01

Abstract

The utility model provides a flange bolt loosening and fracture monitoring system which comprises a traction line, a bolt buckle, a high-precision displacement sensor, an acquisition instrument, an upper computer, a short connecting line and a pulley device, wherein the short connecting line comprises a line passing ring and a flexible line, the flexible line passes through a line passing hole of the bolt buckle and is fixed on the bolt buckle, the pulley device comprises a support frame and at least two pulleys, each pulley comprises a wheel body and a bearing, the support frame is of a strip-shaped groove-shaped structure, through holes for mounting the pulleys are formed in two sides of the support frame, the wheel bodies are vertically distributed in the support frame, gaps between adjacent wheel bodies are wire holes, and the bearings pass through the through holes to mount the wheel bodies in the support frame; the pulley device is fixed on the inner wall of the flange, and a traction line is routed along the inner wall of the flange and passes through the wire passing ring and the wire guide hole; the system can monitor the problem of breakage or loosening and falling of the flange bolt in real time, and has the advantages of simple structure, convenience in installation and maintenance and good monitoring effect.

Description

Flange bolt looseness fracture monitoring system

Technical Field

The utility model belongs to the technical field of flange bolt monitoring, and particularly relates to a flange bolt loosening and fracture monitoring system.

Background

The flange bolt connection is a connection mode of a detachable structure formed by connecting a flange, a gasket and a bolt, and the flange connection is very common in the current industrial field and plays an important role. The blade root and the hub of the large-scale wind generating set and the tower barrels are connected through flange bolts. When the wind turbine generator system runs, the impeller rotates under the action of wind power, the flange bolts at the root parts of the blades can be subjected to various alternating loads and impact loads in work, and the bolts can be broken or loosened and fall off under the action of the external loads. The bolt is broken or loosened and falls off to influence the connection strength of the flange of the blade root, and further influence the safety of the whole wind turbine generator. The current practice in the industry is to arrange manpower to regularly inspect, and check whether the problem of bolt breakage or loosening and falling exists through a visual method. Wind-powered electricity generation field sets up in remote area or marine mostly, and the traffic is inconvenient, and the personnel of patrolling and examining need scramble wind turbine generator system, has increased human cost and safe risk.

At present, a technical scheme of monitoring flange connecting bolts by using a displacement sensor and a traction wire is available on the market, for example, chinese patent CN214666706U provides a flange connecting bolt monitoring system, the system installs bolt buckles on each bolt, then sets a traction wire on the inner wall of a flange, and the traction wire sequentially passes through a wire passing hole of each bolt buckle and is connected with a high-precision displacement sensor. However, the above scheme also has some defects, for example, the traction wire is directly contacted with the wire passing ring, the conditions of irregular wire passing and uneven tension stress exist, the friction coefficient of the traction wire is larger after the traction wire is connected with a plurality of bolt buckles in series, so that the problems of short service life of the traction wire, poor monitoring effect and the like are caused, when the bolt far away from the displacement sensor is broken or loosened and fallen, the displacement of the traction wire at the measuring end of the displacement sensor is not obvious, the problem that the bolt is broken or loosened and fallen cannot be found in time is caused, the work of follow-up fault repairing is complicated, and the normal operation of the wind generating set cannot be recovered in time. Therefore, there is a need to develop a flange bolt loosening fracture monitoring system that solves the above problems.

Disclosure of Invention

In order to solve the defects, the utility model provides a flange bolt loosening and breaking monitoring system which can monitor the problem of flange bolt breakage or loosening and falling in real time and has the advantages of simple structure, convenience in installation and maintenance and good monitoring effect.

The technical scheme adopted for realizing the above purpose of the utility model is as follows:

a flange bolt looseness fracture monitoring system at least comprises a traction wire, a bolt buckle, a high-precision displacement sensor, an acquisition instrument and an upper computer, wherein the bolt buckle is sleeved on a bolt, the end part of the bolt buckle is provided with a wire passing hole, the high-precision displacement sensor is connected with the acquisition instrument and is fixed on a flange, the acquisition instrument is connected with the upper computer, the monitoring system further comprises a short connecting wire and a pulley device, the short connecting wire comprises a wire passing ring and a flexible wire, and the flexible wire penetrates through the wire passing hole of the bolt buckle and is fixed on the bolt buckle; the pulley device comprises a support frame and at least two pulleys, wherein each pulley comprises a pulley body and a bearing, the support frame is of a strip-shaped groove-shaped structure, through holes for mounting the pulleys are formed in two sides of the support frame, the pulley bodies are vertically mounted in the support frame, gaps between every two adjacent pulley bodies are wire guide holes, and the bearings penetrate through the through holes to mount the pulley bodies in the support frame; the pulley device is fixed on the flange, the traction line is arranged along the flange and penetrates through the wire passing ring and the wire guide hole, and all bolts at the joint of the flange are connected in series and tensioned through the short connecting line and the traction line.

The pulley device further comprises a base plate, the base plate is of a split structure with a hollow part in the middle, the base plate is attached to the inner wall of the support frame, and the end part of the pulley body is located in the hollow part in the middle of the base plate.

The pulley device comprises two pulleys, and a wire guide hole between the two pulleys is larger than the outer diameter of the traction wire.

The inner diameter of the wire passing ring is larger than the outer diameter of the traction wire.

The flexible wire is connected with the bolt buckle through binding, bonding or forceps clip, and the length of the flexible wire is larger than the distance between the bolt buckle and the traction wire.

The pulley device is fixed on the inner wall of the flange in a bonding or strong magnetic connection mode, and the traction line is arranged along the inner wall of the flange.

More than one traction wire is arranged, one end of each traction wire is connected with the measuring end of the high-precision displacement sensor, and the other end of each traction wire is fixed on the flange through bonding or bolts.

Compared with the prior art, the beneficial effect of this application lies in: 1. according to the monitoring system provided by the utility model, the bolt buckle is arranged on the bolt, the short connecting wire is connected with the bolt buckle, the pulley device is arranged on the inner wall of the flange, the short connecting wire and the pulley device are connected in series and tensioned through the traction wire, the tail end of the traction wire is connected with the high-precision displacement sensor, when the bolt is broken or loosened and falls off, the broken or loosened bolt pulls the short connecting wire in the displacement process so as to generate a tensile force effect on the traction wire, the traction wire generates a dragging effect on the measuring end of the high-precision displacement sensor under the tensile force effect, a certain displacement occurs at the moment at the measuring end of the high-precision displacement sensor, and the acquisition instrument receives displacement data and transmits the data to the upper computer, so that the monitoring of the state of the flange connecting bolt is realized;

2. the utility model is provided with the stub wire and the pulley device, the traction wire passes through the wire passing ring of the stub wire and the wire guide hole of the pulley device, the effect of monitoring all bolts at one time is achieved, the utility model is economical and efficient, meanwhile, because the pulley device has a guiding function, the traction wire can be regularly wired along the direction parallel to the edge of the flange, the rolling friction is formed between the traction wire and the pulley, the friction resistance is small when the traction wire moves, and the problem of overlarge friction force when the traction wire moves caused by irregular wiring of the traction wire can be reduced;

3. when the monitoring system is applied, if the problem of bolt breakage or anti-loosening and falling occurs, after the broken or falling bolt is replaced, only the flexible wire of the corresponding short connecting line needs to be cut off, and other parts do not need to be disassembled and assembled, so that the monitoring system can recover the normal monitoring function in a short time, the workload and the cost are saved, and the safety is high.

Drawings

FIG. 1 is a schematic structural view provided by the present invention;

FIG. 2 is a partial block diagram of FIG. 1 provided in accordance with the present invention;

FIG. 3 is a first schematic structural diagram of a pulley apparatus provided in the present invention;

FIG. 4 is a second schematic structural view of the pulley apparatus provided in the present invention;

fig. 5 is a schematic structural diagram three of the pulley device provided by the utility model;

FIG. 6 is a split structure view of the backing plate according to the present invention;

FIG. 7 is a first schematic structural view of a bolt fastener according to the present invention;

FIG. 8 is a second schematic structural view of the bolt fastener provided in the present invention;

FIG. 9 is a schematic diagram of a short wire according to the present invention;

FIG. 10 is a schematic structural view of example 1;

FIG. 11 is a schematic structural view of example 2;

in the figure: 1-bolt, 2-pulley device, 3-upper flange, 4-lower flange, 5-traction line, 6-stub line, 7-bolt buckle, 8-support frame, 9-pulley, 10-backing plate, 11-wire hole, 12-wire hole, 13-flexible wire, 14-wire ring and 15-high precision displacement sensor.

Detailed Description

The present invention will be further described with reference to the following examples.

Example 1

Referring to fig. 1 to 10, the embodiment provides a flange bolt loosening and fracture monitoring system, which at least comprises a traction wire 5, a bolt fastener, a high-precision displacement sensor 15, an acquisition instrument and an upper computer, wherein the bolt fastener 7 is sleeved on a bolt 1 and the end part of the bolt fastener is provided with a wire passing hole 12, the monitoring system also comprises a stub wire 6 and ten pulley devices 2, the number of the stub wire is consistent with that of the bolts, the stub wire comprises a wire passing ring 14 and a flexible wire 13, the flexible wire passes through a wire passing hole of the bolt buckle and is connected to the bolt buckle through binding, bonding or forceps clip buckle, the length of the flexible wire is larger than the distance between the bolt buckle and the traction wire, the length of the flexible wire is left with allowance, the system is used for reducing the resistance influence generated by the displacement of the traction wire, so that the system is sensitive to the problem of bolt breakage or looseness prevention and drop, the wire passing ring is made of a material with a smooth surface, and the inner diameter of the wire passing ring is larger than the outer diameter of the traction wire;

the pulley device comprises a support frame 8 and two pulleys 9, wherein each pulley comprises a pulley body and a bearing, the support frame is of a strip-shaped groove-shaped structure, through holes for mounting the pulleys are formed in two sides of the support frame, the pulley bodies are vertically mounted in the support frame, a gap between every two adjacent pulley bodies is a wire guide hole 11, the inner diameter of each wire guide hole is larger than the outer diameter of a traction wire, and the bearing penetrates through the through holes to mount the pulley bodies in the support frame; the pulley device further comprises a base plate 10, the base plate is of a split structure with a hollow part in the middle, the base plate is attached to the inner wall of the support frame, the end part of each pulley body is located at the hollow part in the middle of the base plate, and the base plate is used for preventing the traction line from being clamped by the edge of the adjacent pulley body, so that the problem that the traction line cannot move is solved;

the pulley device is fixed on the inner wall of the flange in a bonding or strong magnetic force connection mode, the pull wire runs along the inner wall of the flange and penetrates through the wire passing ring and the wire guiding hole, all bolts at the joint of the flange are tensioned in series through short connecting wires and the pull wire, more than one pull wire is arranged, one end of the pull wire is connected with the measuring end of the high-precision displacement sensor, the other end of the pull wire is fixed on the inner wall of the flange in a bonding or bolt fixing mode, the high-precision displacement sensor is fixed on the flange in a gluing, magnetic force or fastener connection mode, the high-precision displacement sensor is connected with the acquisition instrument and is fixed on the flange, more than one port is arranged on the acquisition instrument and is compatible with the access of more than one high-precision displacement sensor, the high-precision displacement sensor is connected with the acquisition instrument through a signal wire and transmits data to the acquisition instrument, and the acquisition instrument is connected with an upper computer, the acquisition instrument is connected with the upper computer in a wired or wireless mode, so that received data are transmitted to the upper computer, a monitoring program is arranged in the upper computer, and the monitoring program stores and analyzes the received data and realizes an alarm function.

The working principle is as follows: all be equipped with the bolt hole that a plurality of positions correspond on flange 3 and the lower flange 4, the bolt passes bolt hole between them and connects flange and lower flange, when the bolt breaks or becomes flexible and drops, the bolt that breaks or drops produces the pulling force effect to the pull wire through the short-circuit, the pull wire produces the pulling action to high accuracy displacement sensor's measuring end under the pulling force effect, certain displacement appears this moment in high accuracy displacement sensor's measuring end, the collection appearance receives displacement data and with data transmission to the host computer, the realization is to the monitoring of flange joint bolt state.

Example 2

Referring to fig. 11, the structure of this embodiment is substantially the same as that of embodiment 1, except that two high-precision displacement sensors are provided in this embodiment, and are respectively connected to the end-to-end ends of the traction wire and fixed on the inner wall of the flange.

Claims

1. The utility model provides a not hard up fracture monitoring system of flange bolt, includes pull wire, bolt buckle, high accuracy displacement sensor, collection appearance and host computer at least, and bolt buckle suit is provided with the line hole on the bolt and the tip, and high accuracy displacement sensor is connected with the collection appearance and all is fixed in on the flange, gathers appearance and host computer connection, its characterized in that: the monitoring system also comprises a short connecting line and a pulley device, wherein the short connecting line comprises a wire passing ring and a flexible wire, and the flexible wire passes through a wire passing hole of the bolt buckle and is fixed on the bolt buckle; the pulley device comprises a support frame and at least two pulleys, wherein each pulley comprises a pulley body and a bearing, the support frame is of a strip-shaped groove-shaped structure, through holes for mounting the pulleys are formed in two sides of the support frame, the pulley bodies are vertically mounted in the support frame, gaps between every two adjacent pulley bodies are wire guide holes, and the bearings penetrate through the through holes to mount the pulley bodies in the support frame; the pulley device is fixed on the flange, the traction line is arranged along the flange and penetrates through the wire passing ring and the wire guide hole, and all bolts at the joint of the flange are connected in series and tensioned through the short connecting line and the traction line.

2. The flange bolt looseness fracture monitoring system of claim 1, wherein: the pulley device further comprises a base plate, the base plate is of a split structure with a hollow part in the middle, the base plate is attached to the inner wall of the support frame, and the end part of the pulley body is located in the hollow part in the middle of the base plate.

3. The flange bolt looseness fracture monitoring system of claim 1, wherein: the pulley device comprises two pulleys, and a wire guide hole between the two pulleys is larger than the outer diameter of the traction wire.

4. The flange bolt looseness fracture monitoring system of claim 1, wherein: the inner diameter of the wire passing ring is larger than the outer diameter of the traction wire.

5. The flange bolt loosening fracture monitoring system of claim 1, wherein: the flexible wire is connected with the bolt buckle through binding, bonding or forceps clip, and the length of the flexible wire is larger than the distance between the bolt buckle and the traction wire.

6. The flange bolt looseness fracture monitoring system of claim 1, wherein: the pulley device is fixed on the inner wall of the flange in a bonding or strong magnetic connection mode, and the traction line is arranged along the inner wall of the flange.

7. The flange bolt looseness fracture monitoring system of claim 1, wherein: more than one traction wire is arranged, one end of each traction wire is connected with the measuring end of the high-precision displacement sensor, and the other end of each traction wire is fixed on the flange through bonding or bolts.