Power generation fan tower bolt tightness online monitoring device

Abstract

The invention discloses a power generation fan tower bolt tightness online monitoring device which comprises a shell, a handle is fixedly connected to the top of the shell, a disc is fixedly connected to the other end of the bottom of the handle, a switching mechanism is arranged at the bottom of the disc, and a fixing mechanism used for fixing the shell is arranged at the bottom of the inner side of the shell. A detection mechanism used for detecting bolts is arranged at the end, away from the disc, of the inner side of the shell, the switching mechanism comprises a circular ring rotationally connected with the circumferential outer wall of the disc, three rotating shafts are rotationally connected to the bottom of the circular ring at equal intervals, and a sleeve is fixedly connected to the bottom of each rotating shaft; therefore, nuts with different sizes can be monitored, and the complexity of sleeve replacement is reduced. According to the system, the technical effects that the tightness state of the tower cylinder bolt can be monitored in real time, once the bolt is loosened, the system can immediately send out an early warning signal, the bolt loosening condition is found in time, fault removal can be conducted in advance, and meanwhile installation and later maintenance are facilitated are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of power generation wind turbine towers, and particularly to an on-line monitoring device for the tightness of bolts of power generation wind turbine towers. Background Art

[0002] With the rapid development of renewable energy, wind power generation, as a clean and renewable energy form, is playing an increasingly important role in China's energy structure. As the core equipment of wind power generation, the safe and stable operation of wind turbines is crucial. In wind turbines, the bolt connection of the tower barrel, as a key part bearing huge mechanical loads, the stability of its tightness is directly related to the operation safety and life of the whole wind turbine.

[0003] In the prior art, in order to detect the tightness state of the tower barrel bolts, monitoring by strain gauges is a commonly used method. The strain gauges are pasted on key parts of the tower barrel, such as the flange connection of the tower barrel and near the bolts. When the tightness of the bolts changes, it will cause stress changes in the tower barrel structure. The strain gauges will deform accordingly, and their resistance values will also change correspondingly. By measuring the resistance change of the strain gauges, the tightness of the bolts can be indirectly judged. However, the pasting process requirements of the strain gauges are relatively high. If the pasting is not firm or the pasting position is inaccurate, it will affect the accuracy of the monitoring results. Moreover, during the long-term use of the strain gauges, problems such as aging and fatigue may occur, resulting in inaccurate monitoring data. Therefore, it is designed. Summary of the Invention

[0004] The purpose of the present invention is to solve the disadvantages existing in the prior art, and to propose an on-line monitoring device for the tightness of bolts of power generation wind turbine towers.

[0005] In order to achieve the above purpose, the present invention adopts the following technical scheme:

[0006] An on-line monitoring device for the tightness of bolts of a power generation wind turbine tower, including a housing, a handle is fixedly connected to the top of the housing, the other end of the bottom of the handle is fixedly connected to a disc, a switching mechanism is arranged at the bottom of the disc, a fixing mechanism for fixing the housing is arranged at the inner bottom of the housing, and a detecting mechanism for detecting bolts is arranged at one end of the inner side of the housing away from the disc;

[0007] The switching mechanism includes a ring rotatably connected to the outer circumference of a disc. Three rotating shafts are rotatably connected to the bottom of the ring at equal distances. A sleeve is fixedly connected to the bottom of each rotating shaft. By rotating the three sleeves, nuts of different sizes can be monitored, reducing the cumbersome process of replacing the sleeves. An internal hexagonal screw hole of different sizes is provided at the bottom of each sleeve. A first gear is fixedly sleeved on the circumferential surface of each rotating shaft. The switching mechanism further includes a rotating rod rotatably connected to the middle position at the bottom of the disc. A swing rod is fixedly connected to the bottom of the rotating rod. The other end of the swing rod is fixedly connected to a sliding rod. A notch is provided at the top of the rotating rod, and a slider is slidably connected in the notch. The two ends of the slider are fixedly connected to the same second gear, and the second gear meshes with the three first gears respectively. A round rod is fixedly connected to the bottom of the notch, and the top of the round rod penetrates through the slider. A round hole adapted to the round rod is provided on the slider. A first spring is sleeved on the circumferential surface of the round rod at the bottom of the slider. A pressing rod is rotatably connected to the middle of the top of the slider, and a sliding hole adapted to the round rod is provided at the middle position of the bottom of the pressing rod. A round hole adapted to the pressing rod is provided in the middle of the disc. The number of teeth of the second gear is less than that of the first gear, so that when the sleeve rotates, the swing rod swings more greatly.

[0008] As a further aspect of the present invention, the detection mechanism includes two guide rods fixedly connected to the inner top of the housing. Arc-shaped blocks are slidably sleeved on the circumferential surfaces of the two guide rods. Round holes adapted to the guide rods are provided at both ends of the arc-shaped block. A convex block is fixedly connected to the bottom of each of the two guide rods. An arc-shaped inclined hole is provided in the middle of the arc-shaped block, and the sliding rod is slidably connected in the arc-shaped inclined hole. A U-shaped frame is fixedly connected to the inner bottom of the housing at the bottom of the arc-shaped block. U-shaped clamping blocks are fixedly connected to the top of the U-shaped frame and the bottom of the arc-shaped block respectively. A same strain gauge is arranged between the two U-shaped clamping blocks. Clamping pins are slidably sleeved at both ends of the two U-shaped clamping blocks. Round holes adapted to the clamping pins are provided at the four corners of both ends of the two U-shaped clamping blocks and the strain gauge. Disassembly mechanisms are provided on both U-shaped clamping blocks. Through the setting of the strain gauge in the detection mechanism, when the strain gauge deforms, the user can know that the nut is loose.

[0009] As a further aspect of the present invention, the disassembly mechanism includes a rectangular groove opened on the side of the U-shaped clamping block away from the disc. A T-shaped plate is slidably connected in the rectangular groove. A positioning rod is fixedly connected to the top and bottom at both ends of the rectangular groove, and each positioning rod slidably penetrates through the T-shaped plate. Round holes adapted to the positioning rods are provided at both ends of the T-shaped plate. A second spring is sleeved on one end of each of the two positioning rods away from the strain gauge. Through the setting of the second spring, the T-shaped plate and the annular bayonet, etc., the strain gauge is convenient to replace, avoiding the failure of the strain gauge.

[0010] As a further solution of the present invention, the sides of the two T-shaped plates close to each other are both provided as inclined surfaces, and annular bayonets are respectively formed on the circumferential surfaces of the middle parts of each staple, and the annular bayonets are adapted to the inclined surfaces.

[0011] As a further solution of the present invention, the fixing mechanism includes a rectangular frame fixedly connected to the inner bottom of the housing. A screw slider is slidably connected inside the rectangular frame. A lead screw is rotatably connected between the two ends inside the rectangular frame, and the lead screw threadedly penetrates through the screw slider. A lead screw nut adapted to the lead screw is fixedly sleeved in the middle of the screw slider. A U-shaped plate is fixedly connected to the top of the screw slider. Strip-shaped grooves are respectively formed at both ends of the top of the U-shaped plate. The same sleeve rod slidably penetrates through both ends of the two strip-shaped grooves. Circular holes adapted to the sleeve rod are respectively formed at both ends of the two strip-shaped grooves. Push blocks are fixedly sleeved on the circumferential surfaces of the two sleeve rods located inside the strip-shaped grooves. Fourth springs are respectively sleeved at the ends of the two strip-shaped grooves of the sleeve rod far from the disc, and the fourth springs are adapted to the push blocks. Circular columns are fixedly connected to one ends of the two sleeve rods close to the disc. First connecting rods are rotatably connected to the tops of the two circular columns. The other ends of the two first connecting rods are rotatably connected to the same pressing plate. Second connecting rods are also rotatably connected to both ends of the bottom of the pressing plate. The other ends of the two second connecting rods are rotatably connected to one ends of the U-shaped plate close to the circular column. Through the setting of the fixing mechanism, the fixing of the housing is realized, avoiding the monitoring data error caused by the shaking of the housing when the detection mechanism works.

[0012] As a further solution of the present invention, the fixing mechanism further includes a connecting rod fixedly connected to the end of the lead screw far from the pressing plate, and the connecting rod penetrates through the rectangular frame and the housing and is fixedly connected with a hexagonal knob. Circular holes adapted to the connecting rod are respectively formed at one ends of the housing and the rectangular frame. A ratchet gear is fixedly connected to the circumferential surface of the connecting rod located inside the housing. Through the setting of the connecting rod, the square rod and the third spring, etc., the lead screw will not loosen when the fixing mechanism works, further ensuring the accuracy of monitoring.

[0013] As a further solution of the present invention, the fixing mechanism further includes a square rod slidably penetrating through the bottom of the housing close to the ratchet gear. A square hole adapted to the square rod is formed at the bottom of the housing. A block is fixedly connected to the top of the square rod, and a ratchet tooth adapted to the ratchet gear is fixedly connected to the top of the block. A pulling member is fixedly connected to the bottom of the square rod. A third spring is sleeved on the side surface of the square rod located inside the housing.

[0014] As a further solution of the present invention, a maintenance door is formed at one end of the inner side of the housing far from the disc, and a control module and a storage battery are fixedly connected to the top of the inner side of the housing close to the maintenance door.

[0015] As a further solution of the present invention, the control module is electrically connected to the storage battery and the strain gauge respectively, and a signal transmission module is further arranged inside the control module.

[0016] The beneficial effects of the present invention are as follows:

[0017] In the present invention, due to the adoption of the technical means of the switching mechanism and the detection mechanism, by selecting a suitable sleeve to be sleeved on the nut, when the nut is loose, the rotation angle will be amplified by the switching mechanism, so that the sliding rod drives the detection mechanism to operate, causing a rapid change on the strain gauge. At the same time, the setting of the detection mechanism facilitates the replacement of the strain gauge, effectively solving the problem that the strain gauge is prone to inaccurate monitoring due to insufficient pasting in the background technology. Furthermore, it can realize the real-time monitoring of the tightness state of the tower barrel bolts. Once the bolts show signs of loosening, the system will immediately send out a warning signal to timely detect the loosening condition of the bolts, which helps to troubleshoot in advance and is also convenient for installation and later maintenance.

[0018] In the present invention, through the setting of the fixing mechanism, after the switching mechanism cooperates with the nut, through the operation of the fixing mechanism, the outer shell is firmly fixed near the flange of the tower barrel, and at the same time, left-right and up-down shaking is avoided, ensuring the monitoring accuracy of the detection mechanism and preventing false alarms. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic structural diagram of the overall on-line monitoring device for the tightness of the bolts of the tower barrel of a power generation wind turbine proposed by the present invention;

[0020] Figure 2 It is a schematic cross-sectional structural diagram of the outer shell of the on-line monitoring device for the tightness of the bolts of the tower barrel of a power generation wind turbine proposed by the present invention;

[0021] Figure 3 It is a schematic structural diagram of the switching mechanism of the on-line monitoring device for the tightness of the bolts of the tower barrel of a power generation wind turbine proposed by the present invention;

[0022] Figure 4 It is the on-line monitoring device for the tightness of the bolts of the tower barrel of a power generation wind turbine proposed by the present invention Figure 3 The enlarged structural diagram at position A;

[0023] Figure 5 It is a schematic structural diagram of the detection mechanism of the on-line monitoring device for the tightness of the bolts of the tower barrel of a power generation wind turbine proposed by the present invention;

[0024] Figure 6 It is the on-line monitoring device for the tightness of the bolts of the tower barrel of a power generation wind turbine proposed by the present invention Figure 5 The enlarged structural diagram at position B;

[0025] Figure 7Schematic structural diagram of the nail of the on-line monitoring device for the tightness of bolts of the tower barrel of a power generation wind turbine proposed by the present invention;

[0026] Figure 8 Schematic structural diagram of the fixing mechanism of the on-line monitoring device for the tightness of bolts of the tower barrel of a power generation wind turbine proposed by the present invention;

[0027] Figure 9 For the on-line monitoring device for the tightness of bolts of the tower barrel of a power generation wind turbine proposed by the present invention Figure 8 Schematic enlarged structural diagram at position C;

[0028] Figure 10 Schematic structural diagram at the top of the U-shaped plate of the on-line monitoring device for the tightness of bolts of the tower barrel of a power generation wind turbine proposed by the present invention;

[0029] Figure 11 For the on-line monitoring device for the tightness of bolts of the tower barrel of a power generation wind turbine proposed by the present invention Figure 10 Schematic enlarged structural diagram at position D.

[0030] In the figure: 1. Outer shell; 101. Handle; 102. Disc; 103. Maintenance door; 104. Control module; 105. Storage battery; 2. Switching mechanism; 201. Ring; 202. First gear; 203. Sleeve; 204. Hexagon socket; 205. Rotating rod; 206. Second gear; 207. Pushing rod; 208. Slide block; 209. Round rod; 210. First spring; 211. Swing rod; 212. Slide rod; 3. Detection mechanism; 301. Guide rod; 302. Arc block; 303. Arc inclined hole; 304. U-shaped frame; 305. U-shaped clamping block; 306. Rectangular groove; 307. Positioning rod; 308. Second spring; 309. T-shaped plate; 310. Strain gauge; 311. Nail; 312. Annular bayonet; 4. Fixing mechanism; 401. Rectangular frame; 402. Lead screw; 403. Threaded slider; 404. Hexagonal knob; 405. Connecting rod; 406. Ratchet gear; 407. Block; 408. Square rod; 409. Third spring; 410. Pulling piece; 411. U-shaped plate; 412. Strip-shaped groove; 413. Circular column; 414. Fourth spring; 415. Pushing block; 416. First connecting rod; 417. Second connecting rod; 418. Extrusion plate; 419. Sleeve rod; 5. Tower barrel; 501. Flange; 6. Bolt; 601. Nut. Detailed implementation manners

[0031] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0032] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments may be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0033] Referring to Figures 1-11 , an on-line monitoring device for the tightness of bolts of a power generation fan tower barrel, comprising a housing 1. A handle 101 is fixedly connected to the top of the housing 1. The other end of the bottom of the handle 101 is fixedly connected to a disc 102. A switching mechanism 2 is arranged at the bottom of the disc 102. A fixing mechanism 4 for fixing the housing 1 is arranged at the inner bottom of the housing 1. A detecting mechanism 3 for detecting bolts 6 is arranged at one end of the inner side of the housing 1 away from the disc 102;

[0034] The switching mechanism 2 includes a ring 201 rotatably connected to the circumferential outer wall of the disc 102. Three rotating shafts are rotatably connected to the bottom of the ring 201 at equal intervals. A sleeve 203 is fixedly connected to the bottom of each rotating shaft. Unequally sized inner hexagonal screw holes 204 are formed at the bottom of each sleeve 203. A first gear 202 is fixedly sleeved on the circumferential surface of each rotating shaft. The switching mechanism 2 further includes a rotating rod 205 rotatably connected to the middle position of the bottom of the disc 102. A swing rod 211 is fixedly connected to the bottom of the rotating rod 205. The other end of the swing rod 211 is fixedly connected to a sliding rod 212. A notch is formed at the top of the rotating rod 205, and a slider 208 is slidably connected in the notch. Both ends of the slider 208 are fixedly connected to the same second gear 206, and the second gear 206 meshes with the three first gears 202 respectively. A round rod 209 is fixedly connected to the bottom of the notch, and the top of the round rod 209 penetrates through the slider 208. A circular hole adapted to the round rod 209 is formed in the slider 208. A first spring 210 is sleeved on the circumferential surface of the round rod 209 at the bottom of the slider 208. A pressing rod 207 is rotatably connected to the middle of the top of the slider 208, and a sliding hole adapted to the round rod 209 is formed at the middle position of the bottom of the pressing rod 207. A circular hole adapted to the pressing rod 207 is formed in the middle of the disc 102. Through the arrangement of the switching mechanism 2, the three sleeves 203 can monitor nuts 601 of different sizes, and at the same time, the rotation angle of the nut 601 is enlarged, so that the strain gauge 310 can more easily capture the loosening of the nut 601.

[0035] In this embodiment, the detection mechanism 3 includes two guide rods 301 fixedly connected to the inner top of the housing 1. The circumferential surfaces of the two guide rods 301 are both slidably sleeved with arc-shaped blocks 302. Round holes adapted to the guide rods 301 are provided at both ends of the arc-shaped blocks 302. Convex blocks are fixedly connected to the bottoms of the two guide rods 301. An arc-shaped inclined hole 303 is provided in the middle of the arc-shaped block 302, and the slide rod 212 is slidably connected in the arc-shaped inclined hole 303. A U-shaped frame 304 is fixedly connected to the inner bottom of the housing 1 at the bottom of the arc-shaped block 302. U-shaped clamping blocks 305 are fixedly connected to the top of the U-shaped frame 304 and the bottom of the arc-shaped block 302. A same strain gauge 310 is arranged between the two U-shaped clamping blocks 305. The loosening of the nut 601 can be monitored through the strain gauge 310. Clamping pins 311 are slidably sleeved at both ends of the two U-shaped clamping blocks 305. Round holes adapted to the clamping pins 311 are provided at both ends of the two U-shaped clamping blocks 305 and at the four corners of the strain gauge 310. Disassembly mechanisms are arranged on both U-shaped clamping blocks 305.

[0036] In this embodiment, the disassembly mechanism includes a rectangular groove 306 opened on the side of the U-shaped clamping block 305 away from the disc 102. A T-shaped plate 309 is slidably connected in the rectangular groove 306. Positioning rods 307 are fixedly connected to the top and bottom at both ends of the rectangular groove 306, and each positioning rod 307 slidably penetrates through the T-shaped plate 309. Round holes adapted to the positioning rods 307 are provided at both ends of the T-shaped plate 309. Second springs 308 are sleeved on the ends of the two positioning rods 307 away from the strain gauge 310. Through the settings of the second springs 308, the T-shaped plate 309 and the positioning rods 307, etc., it is convenient for the user to replace the strain gauge 310 and ensure the accuracy of monitoring.

[0037] In this embodiment, the sides of the two T-shaped plates 309 close to each other are both set as inclined surfaces. An annular bayonet 312 is provided on the circumferential surface of the middle of each clamping pin 311, and the annular bayonet 312 is adapted to the inclined surface.

[0038] In this embodiment, the fixing mechanism 4 includes a rectangular frame 401 fixedly connected to the inner bottom of the housing 1. A screw slider 403 is slidably connected inside the rectangular frame 401. A lead screw 402 is rotatably connected between the two ends inside the rectangular frame 401, and the lead screw 402 threadedly penetrates through the screw slider 403. A lead screw nut adapted to the lead screw 402 is fixedly sleeved in the middle of the screw slider 403. The top of the screw slider 403 is fixedly connected to a U-shaped plate 411. Strip-shaped grooves 412 are formed at both ends of the top of the U-shaped plate 411. The same sleeve rod 419 slidably penetrates through both ends of the two strip-shaped grooves 412. Circular holes adapted to the sleeve rod 419 are formed at both ends of the two strip-shaped grooves 412. Push blocks 415 are fixedly sleeved on the circumferential surfaces of the two sleeve rods 419 located inside the strip-shaped grooves 412. A fourth spring 414 is sleeved on each end of the two sleeve rods 419 away from the disc 102 in the strip-shaped groove 412, and the fourth spring 414 is adapted to the push block 415. Circular columns 413 are fixedly connected to one end of the two sleeve rods 419 close to the disc 102. The first link 416 is rotatably connected to the top of the two circular columns 413. The other ends of the two first links 416 are rotatably connected to the same pressing plate 418. The second links 417 are rotatably connected to both ends of the bottom of the pressing plate 418. The other ends of the two second links 417 are rotatably connected to one end of the U-shaped plate 411 close to the circular column 413. Through the settings of the pressing plate 418, circular column 413, fourth spring 414, etc. of the fixing mechanism 4, when the two circular columns 413 press against the inner wall of the tower barrel 5, the housing 1 cannot shake, and at the same time, the pressing plate 418 will gradually rise, so as to strengthen the fixing of the housing 1, so that the housing 1 cannot shake up and down, avoiding false alarms of the detection mechanism 3.

[0039] In this embodiment, the fixing mechanism 4 further includes a connecting rod 405 fixedly connected to one end of the lead screw 402 away from the pressing plate 418. The connecting rod 405 penetrates through the rectangular frame 401 and the housing 1 and is fixedly connected to a hexagonal knob 404. Circular holes adapted to the connecting rod 405 are formed at one end of the housing 1 and the rectangular frame 401. A ratchet gear 406 is fixedly connected to the circumferential surface of the connecting rod 405 located inside the housing 1.

[0040] In this embodiment, the fixing mechanism 4 further includes a square rod 408 slidably penetrating through the bottom of the housing 1 near the ratchet gear 406. A square hole adapted to the square rod 408 is formed at the bottom of the housing 1. A block 407 is fixedly connected to the top of the square rod 408, and a ratchet tooth adapted to the ratchet gear 406 is fixedly connected to the top of the block 407. A pulling member 410 is fixedly connected to the bottom of the square rod 408. A third spring 409 is sleeved on the side of the square rod 408 located inside the housing 1. Through the settings of the ratchet gear 406, square rod 408 and pulling member 410, etc., after the fixing mechanism 4 fixes the housing 1, the lead screw 402 will not loosen, causing the housing 1 to shake, resulting in an error reported by the detection mechanism 3.

[0041] In this embodiment, a maintenance door 103 is provided at one end of the inner side of the housing 1 away from the disc 102. The setting of the maintenance door 103 facilitates the replacement of the strain gauge 310 and avoids the aging and failure of the strain gauge 310. At the top of the inner side of the housing 1 near the maintenance door 103, a control module 104 and a storage battery 105 are fixedly connected.

[0042] In this embodiment, the control module 104 is electrically connected to the storage battery 105 and the strain gauge 310 respectively. A signal transmission module is also provided inside the control module 104. Through the control module 104 with the signal transmission module, the real-time monitoring of the strain gauge 310 is realized, and at the same time, the changing signal is transmitted to the staff.

[0043] Working principle: When the device is in use, after the flanges 501 of two adjacent tower barrels 5 come into contact, the bolts 6 fixed to the bottom flange 501 pass through the holes pre-opened in the top flange 501 and are fixedly connected with nuts 601 to complete the fixed installation of the two tower barrels 5. Press the push rod 207 of the switching mechanism 2, so that the push rod 207 drives the second gear 206 etc. to descend and compress the first spring 210. At this time, the second gear 206 disengages from the three first gears 202. Then rotate the ring 201 so that the sleeve 203 adapted to the nut 601 is located on the outermost side of the housing 1. Then sleeved the hexagonal socket screw hole 204 at the bottom of the sleeve 203 at this place on the nut 601 so that the hexagonal socket screw hole 204 is in close contact with the nut 601. Release the push rod 207. Under the action of the first spring 210, the second gear 206 rises and meshes with the three first gears 202 again. Chamfers are made on both sides of the gears of the second gear 206 and the first gear 202 to facilitate re-meshing after separation. Then rotate the hexagonal knob 404 with a tool to make the lead screw 402 rotate, driving the U-shaped plate 411 to approach one side of the tower barrel 5. When the two circular columns 413 abut against the inner wall of the tower barrel 5, the two circular columns 413 will not move and can only compress the fourth spring 414 through the push block 415. As the U-shaped plate 411 continues to move, the two circular columns 413 fit more closely to the inner wall of the tower barrel 5. At the same time, through the extrusion of the first connecting rod 416 and the second connecting rod 417, the extrusion plate 418 rises, so that the extrusion plate 418 extrudes the bottom flange 501, thus realizing the stable fixation of the housing 1. With the cooperation of the sleeve 203, the left-right and up-down shaking of the housing 1 is avoided. By calibrating the strain gauge 310 through the control module 104, monitoring can be realized. When the nut 601 becomes loose, the first gear 202 is driven to rotate through the sleeve 203, and then the second gear 206 rotates. Since the number of teeth of the first gear 202 is more, the rotation of the second gear 206 is more obvious, so that the swing rod 211 drives the slide bar 212 to swing. Since the slide bar 212 slides in the arc-shaped inclined hole 303 of the detection mechanism 3, when the swing rod 211 swings, it will drive the arc-shaped block 302 to rise, and then drive the strain gauge 310 to be stretched and deformed. At this time, the control module 104 receives the data and transmits the loosening signal through the signal transmission module, and the user can perform timely maintenance. When the strain gauge 310 needs to be replaced due to long-term work and aging, open the inspection door 103 and press the T-shaped plates 309 at the top and bottom to separate the annular bayonet 312 of the corresponding nail 311, and then the nail 311 can be taken out, thus realizing the replacement of the strain gauge 310 and ensuring the accuracy of monitoring.

[0044] For ease of description, spatial relative terms such as "above", "over", "on the upper surface", "upper" etc. can be used here to describe the spatial positional relationship of a device or feature shown in the figure with other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figure for the device. For example, if the device in the attached drawing is inverted, the device described as "above" or "over" other devices or structures will then be positioned "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both the orientations of "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and corresponding interpretations should be made for the spatial relative descriptions used here.

[0045] It should be noted that the terms used here are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used here, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should also be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or their combinations.

[0046] It should be noted that the terms "first", "second", etc. in the description, claims and the above-mentioned drawings of the present application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present application described here can be implemented in an order different from those illustrated or described here. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0047] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. Online monitoring device for the tightness of bolts on the tower barrel of a power generation fan, including a housing (1), characterized in that, A handle (101) is fixedly connected to the top of the outer shell (1). The other end of the bottom of the handle (101) is fixedly connected to a disc (102). A switching mechanism (2) is arranged at the bottom of the disc (102). A fixing mechanism (4) for fixing the outer shell (1) is arranged at the inner bottom of the outer shell (1). A detecting mechanism (3) for detecting a bolt (6) is arranged at one end of the inner side of the outer shell (1) away from the disc (102). The switching mechanism (2) includes a ring (201) rotatably connected to the circumferential outer wall of the disc (102). Three rotating shafts are rotatably connected to the bottom of the ring (201) at equal intervals. A sleeve (203) is fixedly connected to the bottom of each rotating shaft. Unequally sized hexagon socket screw holes (204) are formed at the bottom of each sleeve (203). A first gear (202) is fixedly sleeved on the circumferential surface of each rotating shaft. The switching mechanism (2) further includes a rotating rod (205) rotatably connected to the middle position of the bottom of the disc (102). A swing rod (211) is fixedly connected to the bottom of the rotating rod (205). A sliding rod (212) is fixedly connected to the other end of the swing rod (211). A notch is formed at the top of the rotating rod (205), and a slider (208) is slidably connected in the notch. The two ends of the slider (208) are fixedly connected to the same second gear (206), and the second gear (206) is meshed with the three first gears (202) respectively. A round rod (209) is fixedly connected to the bottom of the notch, and the top of the round rod (209) penetrates through the slider (208). A round hole adapted to the round rod (209) is formed in the slider (208). A first spring (210) is sleeved on the circumferential surface of the round rod (209) at the bottom of the slider (208). A pressing rod (207) is rotatably connected to the middle of the top of the slider (208), and a sliding hole adapted to the round rod (209) is formed at the middle position of the bottom of the pressing rod (207). A round hole adapted to the pressing rod (207) is formed in the middle of the disc (102).

2. The on-line monitoring device for the tightness of bolts of a power generation wind turbine tower barrel according to claim 1, characterized in that The detection mechanism (3) includes two guide rods (301) fixedly connected to the inner top of the housing (1). The circumferential surfaces of the two guide rods (301) are both slidably sleeved with arc-shaped blocks (302). Both ends of the arc-shaped block (302) are provided with round holes adapted to the guide rods (301). Convex blocks are fixedly connected to the bottoms of the two guide rods (301). An arc-shaped inclined hole (303) is formed in the middle of the arc-shaped block (302), and the slide rod (212) is slidably connected in the arc-shaped inclined hole (303). A U-shaped frame (304) is fixedly connected to the inner bottom of the housing (1) at the bottom of the arc-shaped block (302). U-shaped clamping blocks (305) are fixedly connected to the top of the U-shaped frame (304) and the bottom of the arc-shaped block (302). A same strain gauge (310) is arranged between the two U-shaped clamping blocks (305). The two ends of the two U-shaped clamping blocks (305) are both slidably sleeved with clamping pins (311). Round holes adapted to the clamping pins (311) are formed at the four corners of the two ends of the two U-shaped clamping blocks (305) and the strain gauge (310). Disassembly mechanisms are arranged on the two U-shaped clamping blocks (305).

3. The on-line monitoring device for the tightness of bolts of a power generation wind turbine tower barrel according to claim 2, characterized in that, The disassembly mechanism includes a rectangular groove (306) formed on the side of the U-shaped clamping block (305) away from the disc (102). A T-shaped plate (309) is slidably connected in the rectangular groove (306). Positioning rods (307) are fixedly connected to the top and bottom of both ends of the rectangular groove (306), and each positioning rod (307) slidably penetrates through the T-shaped plate (309). Round holes adapted to the positioning rods (307) are formed at both ends of the T-shaped plate (309). Second springs (308) are sleeved on the ends of the two positioning rods (307) away from the strain gauge (310).

4. The on-line monitoring device for the tightness of bolts of a power generation wind turbine tower barrel according to claim 3, characterized in that, The sides of the two T-shaped plates (309) close to each other are both inclined planes. An annular bayonet (312) is formed on the circumferential surface of the middle of each clamping pin (311), and the annular bayonet (312) is adapted to the inclined plane.

5. The on-line monitoring device for the bolt tightness of the power generation fan tower barrel according to claim 1, characterized in that, The fixing mechanism (4) includes a rectangular frame (401) fixedly connected to the inner bottom of the housing (1). A screw slider (403) is slidably connected inside the rectangular frame (401). A lead screw (402) is rotatably connected between the two ends inside the rectangular frame (401), and the lead screw (402) threadedly penetrates through the screw slider (403). A lead screw nut adapted to the lead screw (402) is fixedly sleeved in the middle of the screw slider (403). The top of the screw slider (403) is fixedly connected to a U-shaped plate (411). Strip-shaped grooves (412) are formed at both ends of the top of the U-shaped plate (411). A same sleeve rod (419) slidably penetrates through both ends of the two strip-shaped grooves (412). Round holes adapted to the sleeve rod (419) are formed at both ends of the two strip-shaped grooves (412). Push blocks (415) are fixedly sleeved on the circumferential surfaces of the two sleeve rods (419) located inside the strip-shaped grooves (412). A fourth spring (414) is sleeved on one end of each of the two sleeve rods (419) away from the disc (102) in the strip-shaped groove (412), and the fourth spring (414) is adapted to the push block (415). Circular columns (413) are fixedly connected to one end of each of the two sleeve rods (419) close to the disc (102). First connecting rods (416) are rotatably connected to the tops of the two circular columns (413). The other ends of the two first connecting rods (416) are rotatably connected to the same pressing plate (418). Second connecting rods (417) are rotatably connected to both ends of the bottom of the pressing plate (418). The other ends of the two second connecting rods (417) are rotatably connected to one end of the U-shaped plate (411) close to the circular column (413).

6. The on-line monitoring device for the tightness of bolts of a power generation wind turbine tower barrel according to claim 5, characterized in that, The fixing mechanism (4) further includes a connecting rod (405) fixedly connected to one end of the lead screw (402) away from the pressing plate (418). The connecting rod (405) penetrates through the rectangular frame (401) and the housing (1) and is fixedly connected to a hexagonal knob (404). Round holes adapted to the connecting rod (405) are formed at one end of the housing (1) and the rectangular frame (401). A ratchet gear (406) is fixedly connected to the circumferential surface of the connecting rod (405) located inside the housing (1).

7. The on-line monitoring device for the tightness of bolts of a power generation wind turbine tower according to claim 6, characterized in that, The fixing mechanism (4) further includes a square rod (408) slidably penetrating through the bottom of the housing (1) close to the ratchet gear (406). A square hole adapted to the square rod (408) is formed at the bottom of the housing (1). A block (407) is fixedly connected to the top of the square rod (408), and a ratchet tooth adapted to the ratchet gear (406) is fixedly connected to the top of the block (407). A pulling member (410) is fixedly connected to the bottom of the square rod (408). A third spring (409) is sleeved on the side of the square rod (408) located inside the housing (1).

8. The on-line monitoring device for the tightness of bolts of a power generation wind turbine tower barrel according to claim 1, characterized in that, An access door (103) is formed at one end of the inner side of the housing (1) away from the disc (102). A control module (104) and a storage battery (105) are fixedly connected to the top of one side of the inner side of the housing (1) close to the access door (103).

9. The on-line monitoring device for the tightness of bolts of a power generation wind turbine tower barrel according to claim 8, characterized in that, Moreover, the control module (104) is electrically connected to the storage battery (105) and the strain gauge (310) respectively, and a signal transmission module is further arranged inside the control module (104).

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