CN108897064B - Bolt fracture monitoring device - Google Patents
Bolt fracture monitoring device Download PDFInfo
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- CN108897064B CN108897064B CN201811011449.2A CN201811011449A CN108897064B CN 108897064 B CN108897064 B CN 108897064B CN 201811011449 A CN201811011449 A CN 201811011449A CN 108897064 B CN108897064 B CN 108897064B
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- 238000012806 monitoring device Methods 0.000 title claims abstract description 21
- 238000001514 detection method Methods 0.000 claims abstract description 18
- 238000012545 processing Methods 0.000 claims abstract description 7
- 230000008859 change Effects 0.000 claims description 13
- 238000004891 communication Methods 0.000 claims description 13
- 238000012544 monitoring process Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 238000007689 inspection Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V9/00—Prospecting or detecting by methods not provided for in groups G01V1/00 - G01V8/00
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- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- Geophysics (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
The invention relates to a bolt fracture monitoring device, in particular to a monitoring device capable of identifying bolt fracture and preventing fracture sections from falling. The bolt fracture monitoring device comprises a plurality of bolt connecting pieces and a hose, wherein a fixing clamp is arranged at the first end of each bolt connecting piece, and one end of each hose sequentially penetrates through the fixing clamp and then is connected with the pressure measuring device; the pressure measuring device is connected with the data receiving device and is used for transmitting the acquired pressure detection data information to the data receiving device; the data receiving device is connected with the microprocessor and is used for transmitting the received data information to the microprocessor for processing. The bolt fracture monitoring device can accurately judge bolt fracture or looseness, and can also prevent residual parts from falling.
Description
Technical Field
The invention relates to a bolt fracture monitoring device, in particular to a monitoring device capable of identifying bolt fracture and preventing fracture sections from falling.
Background
There is a large amount of bolted connection in the real engineering field, because multiple factor leads to bolt loosening, drops, the inefficacy condition such as fracture, can reduce connection structure intensity, drop the part and endanger operation equipment and personnel's safety, need discover the bolt fracture in the shortest time to maintain, prevent other bolts further fracture and endanger personnel's equipment's safety.
The manual detection of bolt fracture does not need to carry complicated instruments, the replacement operation is relatively easy, but the manual detection of operation equipment needs to be stopped, for example, the labor intensity of frequent manual inspection of equipment with far distance from a wind turbine is overlarge and the cost is high, so that a set of bolt monitoring device is needed to realize remote monitoring.
At present, bolt fracture monitoring in the market adopts a sensor installed on a bolt or a lead arranged on the bolt, and whether the bolt is broken or not is judged through analysis of an acquisition system. Since a plurality of bolts are connected to each bolt to be monitored, a large number of measuring points are required to be arranged, and a large number of parts are added, so that the cost is increased and the reliability is reduced. And there is a loss of the sensor and the rearrangement of the monitoring device after the replacement of the bolt causes a complicated operation.
Disclosure of Invention
In order to solve the defects in the prior art, the invention provides the bolt fracture monitoring device which can accurately judge the fracture or looseness of a bolt and can prevent the residual parts from falling.
According to the technical scheme provided by the invention, the bolt fracture monitoring device comprises a plurality of bolt connecting pieces and a hose, wherein a fixing clamp is arranged at the first end of each bolt connecting piece, and one end of the hose sequentially penetrates through the fixing clamp and then is connected with a pressure measuring device;
the pressure measuring device is connected with the data receiving device and is used for transmitting the acquired pressure detection data information to the data receiving device;
the data receiving device is connected with the microprocessor and is used for transmitting the received data information to the microprocessor for processing.
Further, the edge of the second end of the bolt connecting piece forms a circle of connecting edge, threads are arranged on the inner surface of the connecting edge, and the connecting edge can be in threaded connection with the tail end of a screw rod of the bolt.
Further, a magnet is arranged on the second end of the bolt connecting piece, and the magnet can attract the tail end of the screw rod of the bolt.
Further, a connecting groove is formed in the tail end of the screw rod of the bolt, an internal thread is formed in the connecting groove, a connector which is correspondingly matched with the connecting groove is arranged on the second end of the bolt connecting piece, and an external thread is formed on the surface of the connector.
Further, the hose is hollow, the first end of the hose is closed, the second end of the hose is open, and the second end of the hose is connected with the pressure measuring device.
Further, the microprocessor is also connected with a communication device, and the microprocessor sends analysis result information to the terminal equipment through the communication device.
Further, the device also comprises a calibration pressure measuring device and a calibration thermometer, wherein the calibration pressure measuring device and the calibration thermometer are both connected with the data receiving device, and are respectively used for collecting atmospheric pressure data and temperature data and transmitting the collected atmospheric pressure data and temperature data to the data receiving device.
From the above, the bolt fracture monitoring device provided by the invention has the following advantages compared with the prior art: the bolts are broken due to the fact that the bolts are continuously subjected to alternating load in the long-term running process of the unit, and the remote relative distance of the unit is high, so that the personnel release cost of the offshore unit is particularly high, and the personnel inspection cost is reduced through the remote control device; meanwhile, the invention reduces the use amount of the sensor and the equipment cost; in addition, the hose which is not easy to break and has flexibility is fixed on the bolt, the broken bolt is prevented from falling under the condition of guaranteeing the monitoring sensitivity, and the occurrence of accidents that the personnel or the equipment is endangered due to the fact that the broken piece of the bolt is blocked by operating equipment and the like is avoided, so that the safety of the personnel and the equipment is guaranteed.
Drawings
Fig. 1 is a schematic diagram of a bolt fracture monitoring device provided by the invention.
FIG. 2 is a schematic view of a sensor installation of the present invention applied to monitoring of bolt breakage at the root of a wind turbine blade.
Fig. 3 is a schematic view showing the structure of a third embodiment of the bolting means of the invention to the bolt.
Fig. 4 is a schematic view showing the structure of a first embodiment of the bolting means of the invention to the bolt.
FIG. 5 is a system topology of the invention as applied to monitoring of bolt breaks at the root of a wind turbine blade.
1. The device comprises a bolt connecting piece 110, a fixing clamp 120, a connecting edge 2, a hose 3-1, a pressure measuring device 3-2, a pressure measuring device 3-3, a data receiving device 4, a microprocessor 5, a communication device 6, a calibration pressure measuring device 7, a calibration thermometer 8, a connecting groove 9 and a connector 10.
Detailed Description
The present invention will be further described in detail below with reference to specific embodiments and with reference to the accompanying drawings, in order to make the objects, technical solutions and advantages of the present invention more apparent. Wherein like parts are designated by like reference numerals. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to directions in the drawings. The words "inner" and "outer" are used to refer to directions toward or away from, respectively, the geometric center of a particular component.
The bolt fracture monitoring device comprises the following two embodiments:
embodiment one: taking the case of monitoring the breaking condition of a bolt at the blade root of a wind turbine as an example:
as shown in fig. 1 and 2, a bolt connecting piece 1 is connected to the tail end of each bolt, a circle of connecting edges 120 are formed on the edge of the second end of the bolt connecting piece 1, and threads are arranged on the inner surface of the connecting edges 120, so that the connecting edges 120 are screwed with the tail ends of the bolts. The first end of the bolt connecting piece 1 is provided with C-shaped fixing clamps 110, each blade root is provided with a hose 2 with a closed first end, the second end of the hose 2 sequentially passes through the C-shaped fixing clamps 110 on the bolt connecting piece 1 and then is connected with a pressure measuring device 3, and the pressure measuring device is arranged at the blade root cover plate; as shown in fig. 4, the connection method of the bolt connection member 1 to the bolt is a first embodiment of connection.
The second embodiment of the connection of the screw connection 1 to the screw is: the bolt connecting piece 1 can be connected to the tail end of a screw rod of the bolt in a magnetic attraction type, and in the magnetic attraction type connection mode, a magnet is arranged at the second end of the bolt, and the magnet can attract the tail end of the screw rod of the bolt.
The third embodiment of the bolt connection 1 to the bolt is: as shown in fig. 3, a connecting groove 9 is formed in the tail end of the screw rod of the bolt, an internal thread is formed on the connecting groove 9, a connector 10 correspondingly matched with the connecting groove 9 is formed on the second end of the bolt connecting piece 1, and an external thread is formed on the surface of the connector 10, so that the connector 10 is in threaded connection with the connecting groove 9.
As shown in fig. 1 and 2, the pressure measuring device 3 is connected with a data receiving device 4 and is used for transmitting the collected pressure detection data information to the data receiving device 4; the data receiving device 4 is connected with the microprocessor 5, and the data receiving device 4 is used for transmitting the received data information to the microprocessor 5 for processing; the microprocessor 5 compares the received pressure detection data information with a preset threshold value therein, and when the variation range of the pressure detection data information exceeds the threshold value range, it judges that there is a risk of breaking or loosening of the larger bolt at the blade root. The data receiving device 4 and the microprocessor 5 are installed in an installation cabinet positioned at the hub, and the microprocessor 5 can adopt an industrial personal computer of the Mianhua ark-1123.
Since the hose 2 is connected to the bolts fixed to each blade root by the bolt connection 1, the hose 2 is strong enough to resist the weight of the bolts when the bolts are broken, thereby preventing the bolts from falling into the inside of the hub or even out of the hub.
When the bolt breaks loose, the wind wheel is in a rotating state, so that the residual parts of the bolt have a falling trend or shake, the hose 2 is pulled to change the internal pressure of the hose 2, and the pressure of each part of the hose 2 is changed when the pressure in the hose 2 is changed, so that the pressure measuring device at the second end of the hose 2 can monitor the pressure change.
In order to enable the manager to timely grasp the bolt condition, the microprocessor 5 is further connected with the communication device 6, the communication device 6 can adopt Bluetooth or zigbee, the microprocessor 5 sends analysis result information to the terminal device through the communication device 6, and the manager can timely grasp the bolt condition through the terminal device. The communication device 6 is mounted in a mounting cabinet at the hub.
In order to avoid such errors, the invention further comprises a calibration pressure measuring device 7 and a calibration thermometer 8, wherein the calibration pressure measuring device 7 and the calibration thermometer 8 are connected with a data receiving device 4, the calibration pressure measuring device 7 and the calibration thermometer 8 are respectively used for collecting atmospheric pressure data and temperature data and transmitting the collected atmospheric pressure data and temperature data to the data receiving device 4, the data receiving device 4 transmits the received atmospheric pressure data and temperature data to a microprocessor 5, and the microprocessor 5 can subtract the change of the pressure detection data information due to the change of the atmospheric pressure influenced by the temperature or other reasons in the process of processing the data so as to change the data detected by the pressure measuring device, thereby obtaining the actual change of the pressure detection data information, reducing errors and accurately judging the bolt state.
The wind generating set blades are connected with the hub through the variable pitch bearing to form a wind wheel, one wind wheel is usually 3 blades, the blades are connected with the variable pitch bearing through blade root bolts, and tens of bolts are connected to each position. Typically the hub is typically hundreds of meters from the ground, and if metal parts fall off, this can be a serious threat to personnel and equipment safety in the vicinity of the unit.
As shown in fig. 5, three blades of the wind wheel are respectively and correspondingly connected with three pressure measuring devices 3, each pressure measuring device is connected with a data receiving module 4, the data receiving module 4 is also connected with a pressure measuring device 7 for calibration and a thermometer 8 for calibration, and the data receiving module 4 is connected with a microprocessor 5. The microprocessor 5 transmits data to the terminal device via the communication means 6.
Embodiment two: taking the case of monitoring the breaking condition of a bolt on a tower as an example:
at the bottom of each flange bolt connection, a bolt connection piece 1 and a hose 2 are installed, and the structure of the bolt connection piece 1 and the hose 2 is the same as that of the first embodiment. The second end of the hose 2 is connected to a pressure measuring device which is fixed to the tower wall or platform and connects all pressure measuring devices on the whole tower to a data receiving device 4 at the bottom of the tower via a data line. The pressure measuring device 3 is connected with the data receiving device 4 and is used for transmitting the collected pressure detection data information to the data receiving device 4; the data receiving device 4 is connected with the microprocessor 5, and the data receiving device 4 is used for transmitting the received data information to the microprocessor 5 for processing; the microprocessor 5 compares the received pressure detection data information with a preset threshold value therein, and when the range of variation of the pressure detection data information exceeds the threshold value range, it judges that there is a risk of breaking or loosening of a large bolt at the tower. The data receiving means 4 and the microprocessor 5 are mounted in a collection tank located at the bottom of the tower.
When the tower bolt breaks, due to gravity and the flexibility of the hose 2, the bolt breaking piece sinks to squeeze the hose 2 locally, so that the pressure in the hose 2 changes, and the bolt breaking is monitored. And because the hose 2 has certain toughness, the bolts can be prevented from falling, and the danger to personnel and equipment below is avoided.
The microprocessor 5 is also connected with the communication device 6, the microprocessor 5 sends analysis result information to the terminal equipment through the communication device 6, and a manager can timely grasp the bolt condition through the terminal equipment. The communication device 6 is installed in a collection tank located at the bottom of the tower.
In order to avoid such errors, the invention further comprises a calibration pressure measuring device 7 and a calibration thermometer 8, wherein the calibration pressure measuring device 7 and the calibration thermometer 8 are connected with a data receiving device 4, the calibration pressure measuring device 7 and the calibration thermometer 8 are respectively used for collecting atmospheric pressure data and temperature data and transmitting the collected atmospheric pressure data and temperature data to the data receiving device 4, the data receiving device 4 transmits the received atmospheric pressure data and temperature data to a microprocessor 5, and the microprocessor 5 can subtract the change of the pressure detection data information due to the change of the atmospheric pressure influenced by the temperature or other reasons in the process of processing the data so as to change the data detected by the pressure measuring device, thereby obtaining the actual change of the pressure detection data information, reducing errors and accurately judging the bolt state.
Those of ordinary skill in the art will appreciate that: the above embodiments are merely illustrative of the present invention and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. within the spirit of the present invention should be included in the scope of the present invention.
Claims (6)
1. The bolt fracture monitoring device is characterized by comprising a plurality of bolt connecting pieces (1) and hoses (2), wherein a fixing clamp (110) is arranged at a first end of each bolt connecting piece (1), and a second end of each bolt connecting piece is used for connecting a bolt; one end of the hose (2) sequentially passes through the fixing clamp (110) and then is connected with the pressure measuring device (3);
the inside of the hose (2) is hollow, the first end of the hose is closed, the second end of the hose is open, and the second end of the hose (2) is connected with the pressure measuring device (3);
the pressure measuring device (3) is connected with the data receiving device (4), and the pressure measuring device (3) is used for transmitting the collected pressure detection data information to the data receiving device (4);
the data receiving device (4) is connected with the microprocessor (5), and the data receiving device (4) is used for transmitting the received data information to the microprocessor (5) for processing;
when the bolt breaks or loosens, the residual part of the bolt has a falling trend or shakes, so that the hose (2) is pulled to change the internal pressure of the hose (2), and as the internal pressure of each part of the hose (2) changes when the pressure in the hose (2) changes, the pressure measuring device at the second end of the hose (2) can monitor the pressure detection data information of the pressure change;
the microprocessor (5) compares the received pressure detection data information with a preset threshold value, and judges that the risk of bolt breakage or loosening exists when the change range of the pressure detection data information exceeds the threshold value range.
2. Bolt breakage monitoring device according to claim 1, characterized in that the edge of the second end of the bolted connection (1) forms a turn of connection rim (120), the connection rim (120) being provided with threads on the inner surface, the connection rim (120) being able to screw the end of the screw of the bolt.
3. Bolt breakage monitoring device according to claim 1, characterized in that the second end of the bolt connection (1) is provided with a magnet which is able to catch the end of the shank of the bolt.
4. The bolt fracture monitoring device according to claim 1, wherein a connecting groove (9) is formed in the tail end of the bolt, an internal thread is formed on the connecting groove (9), a connector (10) correspondingly matched with the connecting groove (9) is formed on the second end of the bolt connecting piece (1), and an external thread is formed on the surface of the connector (10).
5. Bolt breakage monitoring device according to claim 1, characterized in that the microprocessor (5) is further connected to communication means (6), the microprocessor (5) sending analysis result information to the terminal device via the communication means (6).
6. The bolt breakage monitoring device according to claim 1, further comprising a calibration pressure measuring device (7) and a calibration thermometer (8), wherein the calibration pressure measuring device (7) and the calibration thermometer (8) are connected to the data receiving device (4), and the calibration pressure measuring device (7) and the calibration thermometer (8) are respectively used for acquiring the atmospheric pressure data and the temperature data and transmitting the acquired atmospheric pressure data and temperature data to the data receiving device (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811011449.2A CN108897064B (en) | 2018-08-31 | 2018-08-31 | Bolt fracture monitoring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811011449.2A CN108897064B (en) | 2018-08-31 | 2018-08-31 | Bolt fracture monitoring device |
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| Publication Number | Publication Date |
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| CN108897064A CN108897064A (en) | 2018-11-27 |
| CN108897064B true CN108897064B (en) | 2023-12-08 |
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| CN201811011449.2A Active CN108897064B (en) | 2018-08-31 | 2018-08-31 | Bolt fracture monitoring device |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110068665A (en) * | 2019-04-22 | 2019-07-30 | 云南电力技术有限责任公司 | The detection device and method of a kind of wind-driven generator, bolt defect |
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| WO2015039727A1 (en) * | 2013-09-19 | 2015-03-26 | Senvion Se | Apparatus, system and method for monitoring a flange connection of a wind energy installation |
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| CN206192641U (en) * | 2016-09-29 | 2017-05-24 | 远景能源（江苏）有限公司 | Be used for monitoring cracked device of bolt |
| CN207008077U (en) * | 2017-07-25 | 2018-02-13 | 远景能源（江苏）有限公司 | Monitoring bolt breaking device |
| CN208818844U (en) * | 2018-08-31 | 2019-05-03 | 无锡风电设计研究院有限公司 | Bolt fracture monitoring device |
-
2018
- 2018-08-31 CN CN201811011449.2A patent/CN108897064B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001311670A (en) * | 2000-04-28 | 2001-11-09 | Matsushita Electric Ind Co Ltd | Axle detector and axle detecting device including the axle detector |
| CN103814283A (en) * | 2011-09-20 | 2014-05-21 | 宝马股份公司 | Device for detecting the impact of an object on a vehicle |
| WO2015039727A1 (en) * | 2013-09-19 | 2015-03-26 | Senvion Se | Apparatus, system and method for monitoring a flange connection of a wind energy installation |
| CN104266786A (en) * | 2014-09-05 | 2015-01-07 | 武汉理工光科股份有限公司 | Bolt fastening degree online detecting system and method based on OTDR technology |
| CN205664964U (en) * | 2016-06-08 | 2016-10-26 | 安徽江淮汽车股份有限公司 | Threaded connection elasticity state detection device has |
| CN206192641U (en) * | 2016-09-29 | 2017-05-24 | 远景能源（江苏）有限公司 | Be used for monitoring cracked device of bolt |
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| CN208818844U (en) * | 2018-08-31 | 2019-05-03 | 无锡风电设计研究院有限公司 | Bolt fracture monitoring device |
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