CN210243155U - Hydraulic turbine top cap bolt nut looseness detects sensor - Google Patents
Hydraulic turbine top cap bolt nut looseness detects sensor Download PDFInfo
- Publication number
- CN210243155U CN210243155U CN201921144395.7U CN201921144395U CN210243155U CN 210243155 U CN210243155 U CN 210243155U CN 201921144395 U CN201921144395 U CN 201921144395U CN 210243155 U CN210243155 U CN 210243155U
- Authority
- CN
- China
- Prior art keywords
- hydraulic turbine
- magnetic core
- hall sensor
- nut
- top cover
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The utility model relates to a hydraulic turbine top cover bolt and nut looseness detecting sensor, which comprises a measuring magnetic core cover, a measuring support cup, a Hall sensor and a measuring magnetic core matched with the Hall sensor; the measuring magnetic core cover is arranged on the top of a top cover bolt of the hydraulic turbine unit; the bottom of the measuring support cup is a nut sleeve section matched with a top cover nut of the hydraulic turbine unit, a limiting through hole matched with a limiting counter bore in the side wall of the top cover nut of the hydraulic turbine unit is formed in the side wall of the nut sleeve section, and the nut sleeve section is used for being sleeved on the top cover nut of the hydraulic turbine unit; the top of the measuring support cup is provided with a Hall sensor mounting position, the Hall sensor is mounted in the Hall sensor mounting position, a second cavity is formed between the sleeve section of the nut in the measuring support cup and the Hall sensor mounting position, and the measuring magnetic core cover is positioned in the second cavity. The utility model discloses can carry out real-time detection to hydroelectric set top cap fixing bolt, guarantee hydroelectric generator's safe operation.
Description
Technical Field
The utility model relates to a generating set safety inspection technical field specifically indicates a not hard up sensor that detects of hydraulic turbine top cap bolt nut.
Background
In recent years, with the development of hydropower resources being accelerated and the progress of design and manufacturing technology, the capacity of a unit and the size of a runner of a hydroelectric generator under construction and operation are far beyond the past, and the safety of a unit top cover fixing bolt (or a fastening bolt) is concerned to be improved.
In the hydraulic turbine, the top cover which has the dual functions of supporting and overflowing is a key component of the hydraulic turbine generator set, and the integrity of the structure and the function of the top cover directly influences the safe operation of the generator set. In order to ensure the safety of the unit, the monitoring of the top cover bolt is very important in the operation process.
The top cover bolt is mainly used for combining the top cover and the bottom ring, so that the top cover can complete the function of loading the movable guide vanes and the water seal to form a flow channel, and is one of the key bolts of the water turbine generator set.
If the bolt at the position has faults of loosening, failure, even breakage and the like, serious accidents such as part damage, power failure of the whole plant and even machine damage and human death can be caused.
In 2009, 8.17 accidents of shrapnel occurred in russia. The Sayangshansuk hydropower station with 640 ten thousand kilowatts of total installation has a serious accident of machine destruction and human death. The direct cause of the accident is that the top cover fixing bolt of the water turbine is damaged by fatigue under the long-term severe vibration working condition.
The Sayangshansuksk hydropower station 2# hydraulic turbine set is broken due to vibration of the fixing bolts, the set flies, the whole machine room is flooded with water, a plurality of sets are damaged in succession, and 75 people die.
When an accident occurs for 13 minutes, the vibration amplitude of the 2# water turbine cover bearing reaches 840 mu m, and the pressure of the tail water pipe reaches 1.2 kg/cm2The pressure under the cover reaches 3.5 kg per cm2。
Of the 55 top cover fixing bolts, only 6 bolts still play a fixing role, fatigue cracks are found in 41 of the remaining 49 bolts, and the failure area of 8 bolts exceeds 90 percent of the total area. The average value of the fatigue fracture area of the bolt is 64.9 percent.
In the aspect of unit operation, China always pays great attention to the safety management of hydropower stations, and no excessive malignant accidents occur so far. However, in 2016, 9.7 accidents in China occur, and the accident also rises in the hydroelectric power generation industry. A load-shedding type water-pumping and energy-storing power station with the installed capacity of 12 ten thousand kilowatts and two water pump water-turbine generator sets in China has the advantages that when the two sets shed load, a 1# machine top cover bolt is brittle and broken, a top cover is lifted, a factory accident caused by flooding occurs, and no casualties happened.
The top cover of the large mixed-flow generator set is generally positioned in a machine pit of a water machine room, the working environment is abnormal and moist, the vibration intensity is high, and the noise decibel is high. The upper part of the top cover is additionally provided with a safety protection cover plate for protecting maintenance operators. In extreme cases, for example, the roof of a unit installed in a 300-ten-thousand-kilowatt-meter Guizhou hydropower station may be submerged by normal water leakage of approximately 2 meters.
During the operation of a traditional power station on duty, the unit is in the operation period, although all power station personnel know deeply, the only method can only adopt manual inspection and can not adopt direct-viewing ear-listening visual inspection.
Even the primary inspection means, can only be taken off-line, and the status of fasteners, embedments, and fastening components is inspected during overhaul of the unit using conventional and portable measuring instruments in a non-destructive inspection mode.
Or the completely disassembled top cover bolt refers to the national power industry standard for the thermal power unit, and the technical guide of DL/T694-2012 ultrasonic detection of high-temperature fastening bolts. Careful ultrasonic imaging tests were performed on each to see fatigue cracks in the bolt thread groove surfaces.
And real-time monitoring of the unit in the operation process has no effective method for the moment because of the looseness caused by vibration.
In a mode of centralized control and management of a power station, the modern large hydropower station accelerates the process of an unattended mode and a less attended mode in the production and operation of the hydropower station, reduces operation and maintenance personnel, and gradually prolongs the overhaul time interval of a unit to 6 to 8 years. In particular, in recent years, 150 hydroelectric generating sets with the capacity of more than 700MW are put into manufacturing, mounting and running in China, and the risk and pressure of safe production of the hydroelectric generating sets are increasing.
Disclosure of Invention
The utility model aims at providing a not hard up sensor that detects of hydraulic turbine unit top cap bolt nut, the utility model discloses can carry out real-time detection to hydroelectric set top cap fixing bolt, guarantee hydroelectric set's safe operation.
For realizing this purpose, the utility model discloses a not hard up detection sensor of hydraulic turbine top cap bolt nut, its characterized in that: the device comprises a measuring magnetic core cover, a measuring support cup, a Hall sensor and a measuring magnetic core matched with the Hall sensor;
a first cavity matched with a top bolt tightening block of a top cover bolt of the hydraulic turbine unit is arranged in the measuring magnetic core cover, an internal thread through hole communicated with the bottom of the first cavity is arranged in the measuring magnetic core cover at the top of the first cavity, a measuring magnetic core is arranged in the measuring magnetic core cover at the top of the first cavity, a horizontal positioning threaded hole communicated with the first cavity is formed in the side wall of the measuring magnetic core cover, after the internal thread through hole is in threaded connection with the hydraulic turbine unit top cover bolt, the top bolt tightening block is positioned in the first cavity, and a locking screw penetrates through the horizontal positioning threaded hole and then props against the top bolt tightening block;
the bottom of the measuring support cup is a nut sleeve section matched with a top cover nut of the hydraulic turbine unit, a limiting through hole matched with a side wall limiting counter bore of the top cover nut of the hydraulic turbine unit is formed in the side wall of the nut sleeve section, the nut sleeve section is used for being sleeved on the top cover nut of the hydraulic turbine unit, and the side wall limiting counter bore and the limiting through hole are located through a buckle;
the top of the measuring support cup is provided with a Hall sensor mounting position, the Hall sensor is mounted in the Hall sensor mounting position, a second cavity is formed between the sleeve section of the nut in the measuring support cup and the Hall sensor mounting position, and the measuring magnetic core cover is positioned in the second cavity.
The measuring principle of the top cover bolt looseness detecting sensor is non-contact measurement based on a Hall effect. If the top cover bolt nut is loosened, the change of the relative offset angle between the bolt nut can be converted into the angle change between the magnetic field of the core body to be measured and the measuring chip. And the device can detect the rotating position in an environment with high humidity (even underwater) and high vibration intensity, namely in a non-contact way.
The utility model discloses have better reliability, can be in the environment under high humidity, strong shake, 2 meters underwater even, carry out the not hard up detection of no any damage to the fastening bolt nut, the practicality is strong, the reliability is high, succinct practical, easy dismounting, wiring are simple, sustainable long-time normal operating.
Because the utility model discloses a visible suitability is strong, the operation maintenance is simple, reduction operation maintenance personnel safety risk and intensity of labour that can be very big. In the operation process of the unit, the looseness state of the top cover fixing bolt can be detected on line, the operation risk of a power station can be greatly reduced, and serious accidents can be prevented.
Additionally, the utility model discloses when the installation is examined, do not have any damage to hydraulic turbine unit top cap bolt nut, can not influence its normal work yet, guaranteed the safety and stability operation of the hydraulic turbine.
Drawings
FIG. 1 is a schematic view of a top cover bolt and nut of the reclaimed water turbine set according to the present invention;
FIG. 2 is a schematic view of an assembly structure of a magnetic core cover for measurement according to the present invention;
FIG. 3 is a schematic view of a cross-sectional structure of a magnetic core cover for measurement according to the present invention;
FIG. 4 is a schematic perspective view of a measurement holder cup according to the present invention;
FIG. 5 is a schematic cross-sectional view of a measurement holder cup according to the present invention;
fig. 6 is a schematic view of a three-dimensional structure of a hall sensor according to the present invention;
fig. 7 is a schematic view of the assembly structure of the present invention;
FIG. 8 is a side view of FIG. 7;
FIG. 9 is a schematic sectional view taken along line A-A of FIG. 7;
fig. 10 is a schematic sectional view along the direction B-B in fig. 7.
The device comprises a measuring magnetic core cover, a 1.1 first cavity, a 1.2 internal thread through hole, a 1.3 horizontal positioning threaded hole, a 2 hydraulic turbine set top cover bolt, a 2.1 top bolt tightening block, a 2.2 hydraulic turbine set top cover nut, a 2.3 side wall limiting counter bore, a 3 measuring support cup, a 3.1 nut sleeve section, a 3.2 limiting through hole, a 3.3 Hall sensor mounting position, a 3.4 second cavity, a 3.5 horizontal observation window, a 4 buckle, a 5 Hall sensor, a 5.1 cylindrical threaded shell, a 5.2 sensor fixing nut, a 6 measuring magnetic core and a 7 locking screw.
Detailed Description
The invention is described in further detail below with reference to the following figures and specific examples:
the appearance of the bolt and nut of the top cover of the large-scale mixed-flow hydraulic turbine set of the hydropower station is shown in figure 1, and is different from a common bolt and nut, the upper part of the bolt is provided with two parallel planes (namely, a top bolt tightening block 2.1, and the top bolt of the hydraulic turbine set 2 can be tightened through the bolt tightening block 2.1). The top cover nut 2.2 of the hydraulic turbine set is characterized in that the upper half part is a hexagonal rod, the lower part is a straight round body, and six round side wall limiting counter bores 2.3 are uniformly distributed on the surface of the straight round body.
Aiming at the top cover bolt nut of the hydraulic turbine unit with the structure, the utility model discloses a sensor for detecting the looseness of the top cover bolt nut of the hydraulic turbine unit, which comprises a measuring magnetic core cover 1, a measuring support cup 3, a Hall sensor 5 and a measuring magnetic core 6 matched with the Hall sensor 5, as shown in figures 2-10;
a first cavity 1.1 matched with a top bolt tightening block 2.1 of a top cover bolt 2 of the hydraulic turbine unit is arranged in the measuring magnetic core cover 1, an internal thread through hole 1.2 communicated with the bottom of the first cavity 1.1 is arranged in the measuring magnetic core cover 1, a measuring magnetic core 6 is arranged in the measuring magnetic core cover 1 at the top of the first cavity 1.1, a horizontal positioning threaded hole 1.3 communicated with the first cavity 1.1 is formed in the side wall of the measuring magnetic core cover 1, after the internal thread through hole 1.2 is in threaded connection with the top cover bolt 2 of the hydraulic turbine unit, the top bolt tightening block 2.1 is positioned in the first cavity 1.1, and a locking screw 7 penetrates through the horizontal positioning threaded hole 1.3 and then props against the top bolt tightening block 2.1;
the bottom of the measuring support cup 3 is a nut sleeve section 3.1 matched with a top cover nut 2.2 of the hydraulic turbine set, a limiting through hole 3.2 matched with a side wall limiting counter bore 2.3 of the top cover nut 2.2 of the hydraulic turbine set is formed in the side wall of the nut sleeve section 3.1, the nut sleeve section 3.1 is used for being sleeved on the top cover nut 2.2 of the hydraulic turbine set, and the side wall limiting counter bore 2.3 and the limiting through hole 3.2 are positioned through a buckle 4;
the top of the measuring support cup 3 is provided with a Hall sensor mounting position 3.3, the Hall sensor 5 is mounted in the Hall sensor mounting position 3.3, a second cavity 3.4 is formed between the sleeve section 3.1 of the nut in the measuring support cup 3 and the Hall sensor mounting position 3.3, and the measuring magnetic core cover 1 is positioned in the second cavity 3.4. When the nut is loosened, the measuring magnetic core cover and the sensor relatively rotate in the space.
In the technical scheme, six side wall limiting counter bores 2.3 are arranged along the circumferential direction of a top cover nut 2.2 of the hydraulic turbine set, and six limiting through holes 3.2 matched with the six side wall limiting counter bores 2.3 are formed in the side wall of a nut sleeve section 3.1; six easy dismounting's inflation buckle will measure the support cup and become a whole with top cap nut 2.2 hookup.
The measuring support cup 3 is designed without damage according to the appearance characteristics of the top cover nut 2.2 of the hydraulic turbine set. In the design, according to the power station operating condition, give up the viscose bonding form's that receives the unit vibration influence, can only work for a short time, very easily drop idea, adopted the expansion buckle lug connection mode.
In the technical scheme, the Hall sensor mounting position 3.3 is a Hall sensor internal thread mounting hole, the shell of the Hall sensor 5 is a cylindrical threaded shell 5.1, and the cylindrical threaded shell 5.1 is in threaded connection with the Hall sensor internal thread mounting hole. By adopting the traditional threaded connection mode, the processing, the installation and the debugging are convenient.
Among the above-mentioned technical scheme, hall sensor 5 and the coaxial setting of measuring magnetic core 6, hall sensor 5 comes perception hydraulic turbine group top cap bolt 2 and the above-mentioned change in position between hydraulic turbine group top cap nut 2.2 through measuring the angular variation between hall sensor 5 and the measuring magnetic core 6.
In the technical scheme, a horizontal observation window 3.5 communicated with the second cavity 3.4 is formed in the side surface of the measuring support cup 3. Through horizontal observation window, can make things convenient for hall sensor 5 to set for axial measuring range.
In the technical scheme, the cylindrical threaded shell 5.1 is externally connected with the sensor fixing nut 5.2, and the cylindrical threaded shell 5.1 is positioned between the sensor fixing nut 5.2 and the Hall sensor internal thread mounting hole.
In the above technical scheme, the hall sensor 5 and the measuring magnetic core 6 are both waterproof packaged.
Among the above-mentioned technical scheme, measure magnetic core 6 and be axial magnetization's neodymium iron boron magnetism iron, measure magnetic core 6 and install in the magnetic core mounting hole of first cavity 1.1 upper end central authorities. The structure has low processing cost and high positioning precision.
In the technical scheme, six horizontal positioning threaded holes 1.3 communicated with the first cavity 1.1 are formed in the circumferential direction of the side wall of the measuring magnetic core cover 1. The six horizontal positioning threaded holes 1.3 can be used for conveniently finding the positions corresponding to the top bolt tightening blocks 2.1 on the upper portions of the bolts. There, a locking screw 7 is screwed in, so that the measuring core cover 1 and the top cover bolt 2 of the hydraulic turbine are integrated.
Among the above-mentioned technical scheme, be equipped with the rubber pad between locking screw 7 and top bolt tightening block 2.1. The rubber pad can overcome the influence of vibration to hall sensor 5 and 6 testing results of measuring magnetic core.
Among the above-mentioned technical scheme, the screw thread that measures internal thread through-hole 1.2 and hydraulic turbine group top cap bolt 2 of 1 inboard of magnetic core lid closes completely soon, can will measure magnetic core lid 1, easily twist on hydraulic turbine group top cap bolt 2 upper portions that have been in operating condition, and during the unit maintenance, also can easily twist off, it is convenient to dismantle.
In the technical scheme, in the Hall sensor 5, the vertical component of the magnetic field intensity required on the surface of the Hall sensor chip is measured along a concentric circle with the radius of 1.1mm, and the input field intensity is 45-75 mT (millitex).
The selected Hall sensor chip is an integrated Hall sensor which is manufactured by adopting a CMOS standard process and integrates a Hall semiconductor element and a signal regulating circuit, and a rotating current Hall technology is used for detecting a magnetic field distributed on the surface of the Hall sensor chip.
Hall elements built in the Hall sensor chip are distributed around the chip, and the chip provides accurate absolute angle position information with high resolution through sigma-delta analog/digital conversion and a Digital Signal Processing (DSP) algorithm. Meanwhile, a coordinate rotation digital computer (CORDIC) is adopted to calculate the angle and amplitude of the Hall array signal.
The DSP in the Hall sensor drives the red, yellow and green indicator to indicate the axial position of the magnetic core, namely the movement condition of the rotary bipolar magnetic core of the magnetic core cover towards or away from the surface of the Hall sensor is measured, so that the change of the axial distance between the nut and the bolt can be reflected.
The hall sensor chip can detect the direction of the magnetic field and calculate a 14-bit binary code (absolute value, gray code), which can be accessed via a synchronous serial port (SSI). Due to the adoption of a differential measurement technology and a Hall sensor conditioning circuit, the chip can resist the position deviation condition of the magnet and a stray magnetic field. The sensor accurately measures angles over a full 360 ° range with a resolution of up to 0.0879 to 4096 positions per revolution. Meanwhile, the multi-turn measurement of the rotation of the nut can be carried out within the normal magnetic field range.
The Hall sensor 5 adopts an MODBUS RTU communication protocol, and data transmission is realized between the Hall sensor and a matched automatic control sensor through a half-duplex RS-485/RS-422 transceiver and a double-channel digital isolator.
The interfaces of the sensors are connected with an MODBUS communication adapter of a programmable controller PLC by a communication line RS485/RS422 data connecting line (2 to 4-core shielding twisted-pair cable) by adopting a hand-in-hand bus topological structure.
The system calculates the collected data of the Hall sensor 5 in the PLC, compares preset values, sends early warning signals of looseness of the top cover bolts to a monitoring system, and displays real-time coding numbers and states of looseness of the top cover bolts on a local display screen.
A method for detecting looseness of bolts and nuts of a top cover of a hydraulic turbine unit by using the sensor comprises the following steps:
step 1: installing a measuring magnetic core cover 1 on a top cover bolt 2 of the hydraulic turbine unit, wherein an internal thread through hole 1.2 of the measuring magnetic core cover 1 is in threaded connection with the top cover bolt 2 of the hydraulic turbine unit, a top bolt tightening block 2.1 of the top cover bolt 2 of the hydraulic turbine unit is positioned in a first cavity 1.1, and a locking screw 7 passes through a horizontal positioning threaded hole 1.3 and then props against the top bolt tightening block 2.1, so that the measuring magnetic core cover 1 is positioned relative to the top cover bolt 2 of the hydraulic turbine unit;
step 2: mounting a Hall sensor 5 on a Hall sensor mounting position 3.3 of a measuring support cup 3, and mounting the measuring support cup 3 on a hydraulic turbine set top cover nut 2.2, wherein a nut sleeve section 3.1 of the measuring support cup 3 is sleeved on the hydraulic turbine set top cover nut 2.2, a side wall limiting counter bore 2.3 of the hydraulic turbine set top cover nut 2.2 is positioned with a limiting through hole 3.2 of the nut sleeve section 3.1 through a buckle 4, and a measuring magnetic core cover 1 mounted on the hydraulic turbine set top cover bolt 2 is positioned in a second cavity 3.4;
and step 3: hall sensor 5 comes perception hydraulic turbine group top cap bolt 2 and the above-mentioned hydraulic turbine group top cap nut 2.2 position change between through measuring the angular variation between Hall sensor 5 and the measurement magnetic core 6, realizes the not hard up detection of hydraulic turbine group top cap bolt nut.
Details not described in this specification are within the skill of the art that are well known to those skilled in the art.
Claims (9)
1. The utility model provides a not hard up sensor that detects of hydraulic turbine top cap bolt nut which characterized in that: the device comprises a measuring magnetic core cover (1), a measuring support cup (3), a Hall sensor (5) and a measuring magnetic core (6) matched with the Hall sensor (5);
a first cavity (1.1) matched with a top bolt tightening block (2.1) of a top cover bolt (2) of the hydraulic turbine unit is arranged in the measuring magnetic core cover (1), an internal thread through hole (1.2) communicated with the bottom of the first cavity (1.1) is arranged in the measuring magnetic core cover (1), a measuring magnetic core (6) is installed in the measuring magnetic core cover (1) at the top of the first cavity (1.1), a horizontal positioning threaded hole (1.3) communicated with the first cavity (1.1) is formed in the side wall of the measuring magnetic core cover (1), after the internal thread through hole (1.2) is in threaded connection with the hydraulic turbine unit top cover bolt (2), the top bolt tightening block (2.1) is located in the first cavity (1.1), and a locking screw (7) penetrates through the horizontal positioning threaded hole (1.3) and then props against the top bolt tightening block (2.1);
the bottom of the measuring support cup (3) is provided with a nut sleeve section (3.1) matched with a top cover nut (2.2) of the hydraulic turbine unit, the side wall of the nut sleeve section (3.1) is provided with a limiting through hole (3.2) matched with a side wall limiting counter bore (2.3) of the top cover nut (2.2) of the hydraulic turbine unit, the nut sleeve section (3.1) is used for being sleeved on the top cover nut (2.2) of the hydraulic turbine unit, and the side wall limiting counter bore (2.3) and the limiting through hole (3.2) are positioned through a buckle (4);
the top of measuring support cup (3) is equipped with hall sensor installation position (3.3), hall sensor (5) are installed in hall sensor installation position (3.3), are second cavity (3.4) between measuring support cup (3) internal nut cover section (3.1) and hall sensor installation position (3.3), it is located this second cavity (3.4) to measure magnetic core lid (1).
2. The sensor for detecting loosening of bolts and nuts on top cover of hydraulic turbine set according to claim 1, characterized in that: the Hall sensor mounting position (3.3) is a Hall sensor internal thread mounting hole, the shell of the Hall sensor (5) is a cylindrical threaded shell (5.1), and the cylindrical threaded shell (5.1) is in threaded connection with the Hall sensor internal thread mounting hole.
3. The sensor for detecting loosening of bolts and nuts on top cover of hydraulic turbine set according to claim 1, characterized in that: hall sensor (5) and measurement magnetic core (6) coaxial setting, Hall sensor (5) come perception hydraulic turbine group top cap bolt (2) and the above-mentioned position change between hydraulic turbine group top cap nut (2.2) through measuring the angle change between Hall sensor (5) and measurement magnetic core (6).
4. The sensor for detecting loosening of bolts and nuts on top cover of hydraulic turbine set according to claim 1, characterized in that: and a horizontal observation window (3.5) communicated with the second cavity (3.4) is formed in the side surface of the measuring support cup (3).
5. The sensor for detecting loosening of bolts and nuts on top cover of hydraulic turbine set according to claim 2, characterized in that: cylindric thread shell (5.1) external screw thread connection has sensor fixation nut (5.2), cylindric thread shell (5.1) are fixed a position through between sensor fixation nut (5.2) and the hall sensor internal thread mounting hole.
6. The sensor for detecting loosening of bolts and nuts on top cover of hydraulic turbine set according to claim 1, characterized in that: and the Hall sensor (5) and the measuring magnetic core (6) are both packaged in a waterproof mode.
7. The sensor for detecting loosening of bolts and nuts on top cover of hydraulic turbine set according to claim 1, characterized in that: measure magnetic core (6) and be axial magnetization's neodymium iron boron magnet, measure magnetic core (6) and install in the magnetic core mounting hole of first cavity (1.1) upper end midpoint.
8. The sensor for detecting loosening of bolts and nuts on top cover of hydraulic turbine set according to claim 1, characterized in that: six horizontal positioning threaded holes (1.3) communicated with the first cavity (1.1) are formed in the circumferential direction of the side wall of the measuring magnetic core cover (1).
9. The sensor for detecting loosening of bolts and nuts on top cover of hydraulic turbine set according to claim 1, characterized in that: a rubber pad is arranged between the locking screw (7) and the top bolt tightening block (2.1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921144395.7U CN210243155U (en) | 2019-07-19 | 2019-07-19 | Hydraulic turbine top cap bolt nut looseness detects sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921144395.7U CN210243155U (en) | 2019-07-19 | 2019-07-19 | Hydraulic turbine top cap bolt nut looseness detects sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210243155U true CN210243155U (en) | 2020-04-03 |
Family
ID=69992031
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921144395.7U Active CN210243155U (en) | 2019-07-19 | 2019-07-19 | Hydraulic turbine top cap bolt nut looseness detects sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210243155U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110285955A (en) * | 2019-07-19 | 2019-09-27 | 贵州北盘江电力股份有限公司董箐分公司 | Top cover of hydraulic turbine set bolt and nut loosens detection device and method |
-
2019
- 2019-07-19 CN CN201921144395.7U patent/CN210243155U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110285955A (en) * | 2019-07-19 | 2019-09-27 | 贵州北盘江电力股份有限公司董箐分公司 | Top cover of hydraulic turbine set bolt and nut loosens detection device and method |
| CN110285955B (en) * | 2019-07-19 | 2024-02-20 | 贵州北盘江电力股份有限公司董箐分公司 | Device and method for detecting loosening of bolts and nuts of top cover of water turbine unit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110285955B (en) | Device and method for detecting loosening of bolts and nuts of top cover of water turbine unit | |
| CN112097706B (en) | Wind power tower cylinder flange bolt looseness real-time monitoring system and early warning method | |
| CN114323203A (en) | Underground water level monitoring and early warning system | |
| CN210243155U (en) | Hydraulic turbine top cap bolt nut looseness detects sensor | |
| CN107576437B (en) | Gas turbine rotor axial load measuring device | |
| CN108871491B (en) | Intelligent oil level meter for transformer bushing | |
| CN110578862A (en) | Intelligent protective equipment for water meter | |
| CN103256904B (en) | Large rotating supporting rolling way abrasion automatic detecting system | |
| CN211230717U (en) | Fan tower section of thick bamboo safety and basis settlement monitoring devices | |
| CN206919933U (en) | A kind of insulator chain pulling force and obliquity sensor integral structure part | |
| CN209326843U (en) | A kind of intelligence anchor bolt and the steel plate support construction with the intelligence anchor bolt | |
| CN115855351A (en) | Stress monitoring system for water pump turbine top cover bolt | |
| CN107036800B (en) | Radial characteristic detecting system of mine head sheave rope groove | |
| CN215009960U (en) | Reation kettle motor temperature and vibration alarm device | |
| CN211230718U (en) | Fan running state on-line monitoring device | |
| CN112160983A (en) | Intelligent bearing capable of measuring temperature of inner ring | |
| CN208982522U (en) | A kind of intelligent bearing with wireless sensor | |
| CN218674855U (en) | Be used for shaft wear loss detector under deep sea environment | |
| CN204646423U (en) | The special turbo charger speed monitoring device of a kind of gas engine | |
| CN111693286A (en) | Bearing vibration monitoring system | |
| CN213364804U (en) | Device for measuring rotating speed and reverse rotation of water feeding pump | |
| CN215558487U (en) | Real-time monitoring and early warning device of tower crane | |
| CN210513002U (en) | Generator air gap measuring device | |
| CN218270565U (en) | Water pump axial displacement sensor installation and debugging device | |
| CN217926351U (en) | Be used for big-and-middle-sized water pump unit running state monitoring devices |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |