CN104444901B - A kind of oil-well rig folk art term winch electronic differential control system and control method - Google Patents
A kind of oil-well rig folk art term winch electronic differential control system and control method Download PDFInfo
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- CN104444901B CN104444901B CN201410749730.1A CN201410749730A CN104444901B CN 104444901 B CN104444901 B CN 104444901B CN 201410749730 A CN201410749730 A CN 201410749730A CN 104444901 B CN104444901 B CN 104444901B
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- winch
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- incremental encoder
- input shaft
- speed information
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- 238000000034 method Methods 0.000 title claims abstract description 21
- 239000003129 oil well Substances 0.000 title claims abstract description 11
- 230000008569 process Effects 0.000 claims abstract description 6
- 238000012423 maintenance Methods 0.000 claims description 7
- 230000008439 repair process Effects 0.000 claims description 5
- 230000008859 change Effects 0.000 claims description 3
- 238000004886 process control Methods 0.000 claims description 2
- 230000032258 transport Effects 0.000 claims 1
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000005553 drilling Methods 0.000 description 9
- 238000009434 installation Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000007405 data analysis Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
- B66D1/54—Safety gear
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D5/00—Braking or detent devices characterised by application to lifting or hoisting gear, e.g. for controlling the lowering of loads
- B66D5/02—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes
- B66D5/24—Operating devices
- B66D5/26—Operating devices pneumatic or hydraulic
- B66D5/28—Operating devices pneumatic or hydraulic specially adapted for winding gear, e.g. in mining hoists
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Braking Arrangements (AREA)
- Control Of Transmission Device (AREA)
Abstract
The present invention relates to a kind of control system of oil-well rig folk art term position winch and its control method.Wherein, control system includes motor input shaft, first incremental encoder, cylinder, the second incremental encoder, winch shift switch, shift switch auxiliary contact, logic control element, and the counter module that is arranged in logic control element and CPU module, wherein, the switching signal of counter module computing and the rotary speed information of the first incremental encoder of analysis and the output of the second incremental encoder, CPU module process and the output of computing auxiliary contact；Hydraulic disc brake system, image display panel, the invention has the beneficial effects as follows：The driving unit faults such as the skidding occurred inside the operating personnel's winch that cannot judge of naked eyes, insufficient pressure can effectively be judged by display screen, and restriction can be taken in time to prevent accident generation, overall structure small volume is easily installed, closed-loop control, reliability are high.
Description
Technical field
The present invention relates to a kind of control system of oil-well rig folk art term position winch, more particularly to a kind of oil-well rig is double
Gear winch differential control system, and winch rotating speed is controlled by differential control system and prevents the control method of failure.
Background technology
In field of oil drilling, winch is rig core component, and the quality of its performance is directly connected to making for whole bench drill machine
With effect, it is to ensure that oil-well rig meets drilling technology and requires, realize quick drilling, obtain the particularly important of good economic benefits
One of key factor.Well drilling hoist is typically made up of parts such as power, gear, cylinder, clutch, brakes.Winch
There is in drilling process the functions such as drilling, setting of casing, control drilling process the pressure of the drill and overall erection of derrick, it works special
Point is to operate with frequently, and slewing range width, load change are big.Due to many unavoidable factors impact sometimes winch pass
Dynamic equipment occurs that the various failures such as skidding make drum speed with motor speed than there is deviation so that reducing its predetermined function
Even cause serious catastrophic failure and cause huge economic loss.Therefore the safe operation of equipment, prevention, elimination are ensured
Accident is very urgent.Electronic differential control system in the safe and reliable operation for ensureing equipment and obtains very big economic benefit
It is fairly obvious with its meaning in social benefit.
China Patent No. CN201310510072.6 disclose a kind of safe petroleum drilling winch system of high efficiency smart and its
Control method, the method by PLC, vortex brake, height system whether normally reaching control hoister system, it is achieved thereby that
A kind of control method of hoister system, but the art of this patent does not disclose the control method of differential system.
Content of the invention
Skidding accident occur for winch drive apparatus in prior art makes drum speed with motor speed than there is deviation
So that reducing the function of oil-well rig or making the technological deficiency that rig breaks down.
In order to solve above-mentioned technical problem, the problem to be solved in the present invention is to provide a kind of folk art term winch petroleum drilling machine electric
Sub- differential control system, and control winch rotating speed using the differential control system and prevent the control method of failure, wherein, electricity
Sub- differential control system includes：
Motor, motor input shaft, the first incremental encoder on motor input shaft, wherein, the first increment type
Encoder is used for gathering the rotary speed information V on motor input shaft1；
Cylinder, the second incremental encoder on cylinder, wherein, the second incremental encoder is used for gathering cylinder
On rotary speed information V2；
Winch shift switch, wherein, winch shift switch is used for the gear for changing winch；
Auxiliary contact, wherein, auxiliary contact are arranged at winch shift switch, the auxiliary contact output shift switch letter
Number；
Logic control element, wherein, logic control element is that winch central authorities process control system, the logic control element
Counter module is provided with inside, and the counter module is used for the first incremental encoder of computing and the second incremental encoder is exported
Rotary speed information（V1、V2）；CPU module is provided with the logic control element, the CPU module is used for processing and computing is aided in
The switching signal of contact output；
Hydraulic disc brake system, hydraulic disc brake system are used for the operating for controlling winch；
Image display panel, described image display screen are used for the operating condition for showing winch.
The present invention also implements another kind of preferred technical scheme, and wherein, the counter module of selection is counted for Siemens FM350
Number device.
The present invention also implements another kind of preferred technical scheme, and wherein, switching signal passes through CPU module digital quantity input
Mouth is input to CPU module.
The gear of the present invention is divided into low or first gear and top gear, and wherein, the gearratio n setting values of low or first gear are 9.667. high speeds
The gearratio n setting values of shelves are 4.862.
The present invention also provides a kind of oil-well rig folk art term winch differential speed control method, and wherein, the control method includes
Step has：
Rotary speed information V on a, the first incremental encoder collection motor input shaft1, and the rotary speed information V1Input
Arrive counter module；
Rotary speed information V on b, the second incremental encoder collection cylinder2, and the rotary speed information V2It is input to counting
Device module；
C, CPU module read the shift switch signal that auxiliary contact are provided, and judge winch by the shift switch signal
In top gear or low-gearing regime, winch is calculated in top gear or the gearratio n of low or first gear by CPU module then.
D, CPU module are to rotary speed information V1, rotary speed information V2, gearratio n carries out computing, if：
Ⅰ）, motor input shaft rotating speed V1 divided by the span of drum rotation speed V2 be：【n±0.3】（N-0.3≤V1/ V2≤
N+0.3）, then CPU module judge that winch works well, and export image display panel, show that winch works well；
II), motor input shaft rotating speed V1 is more than divided by the value of drum rotation speed V2【N+0.3】（V1/ V2 ＞ n+0.3）,
Then CPU module judges that winch operating is broken down, and CPU module sends halt instruction and gives hydraulic disc brake system, by hydraulic disc brake
System is braked, and is then shut down.
III), motor input shaft rotating speed V1 is less than divided by the value of drum rotation speed V2【n-0.3】（V1/ V2 ＜ n-0.3）,
Then CPU module judges that winch operating is broken down, and CPU module sends halt instruction and gives hydraulic disc brake system, by hydraulic disc brake
System is braked, and is then shut down.
The present invention also implements another kind of preferred technical scheme, breaks down when judging that winch operates, after shutdown, keeps in repair people
Member is keeped in repair to winch.
The invention has the beneficial effects as follows：The strand that operating personnel's naked eyes cannot be judged can effectively be judged by display screen
The driving unit faults such as skidding that in-car portion occurs, insufficient pressure, and restriction can be taken in time to prevent accident generations, integrally
Structural volume is little, is easily installed, closed-loop control, and reliability is high.
Description of the drawings
Fig. 1 is the system construction drawing of differential speed system.
Fig. 2 is winch encoder installation site structural representation.
Fig. 3 is differential control system fault alarm picture（Normally）.
Fig. 4 is differential control system fault alarm picture（Failure）.
Fig. 5 is differential control system flow chart.
In figure, 1- programmable logic controller (PLC)s；（2、2'）- motor；3- hydraulic disc brake systems；4- shift switch；4'- is auxiliary
Help contact；（5、5'）- encoder；7- display screens；（12、12'）- the first incremental encoder；（13,13'）- the first increment type is compiled
Code device.
Specific embodiment
For clearer narration embodiments of the invention, the present invention is described further below in conjunction with the accompanying drawings.
Fig. 1 is the structural representation of the present invention, with reference to shown in Fig. 1, by the first incremental encoder（5,5'）Collect
Motor input shaft（12,12'）Rotary speed information V1It is sent to logic control element（PLC）1, by the second incremental encoder
（5,5'）The cylinder for collecting（6,6'）Rotary speed information V2It is sent to logic control element（PLC）1, motor can pass through logic control
Unit processed（PLC）1 is controlled, logic control element（PLC）1 is connected with display screen 7, the fortune for showing rig by display screen 7
Turn/improper operating condition.Logic control element（PLC）1 by sending command information to brake system 3, by brake system 3
Promote winch stop motion, wherein, brake system 3 is disc brake system 3.Shift switch 4 is provided with auxiliary contact 4', by auxiliary
Contact 4' feedacks are to logic control element（PLC）1, judge winch in run up state or low-speed running shape
State.
Fig. 2 is winch encoder installation site structural representation, with reference to shown in Fig. 2, in winch motor input shaft（12,
12'）The first incremental encoder of upper installation（5,5'）, by the first incremental encoder（5,5'）Detection and collection motor input
Axle（12,12'）Rotary speed information V1, winch motor（2,2'）For drive motor input shaft（12,12'）With cylinder (6,6')
Rotation, the first incremental encoder（5,5'）The motor input shaft for collecting（12,12'）Rotary speed information V1Input logic is controlled
Unit（PLC）1, and by 1 computing of logic control element and carry out data analysis.The second increasing is installed on cylinder (6,6')
Amount formula encoder (13,13'), is detected by the second incremental encoder (13,13') and the rotating speed of collection cylinder (6,6') is believed
Breath V2, the second incremental encoder (13,13') is cylinder (6,6') the rotary speed information V for collecting2It is input to logic control element
（PLC）, and computing and data analysis are carried out by logic control element 1.Auxiliary contact 4' is additionally provided with shift switch 4, auxiliary
Contact 4' collection 4 information of shift switch, 4 information of shift switch is helped to be sent to logic control element by auxiliary contact 4'（PLC）,
And judge that shift switch 4 is low gear to be in high gear by logic control element 1.
Logic control element（PLC）1 includes CPU module and counter module, wherein, the first incremental encoder（5,5'）
The motor input shaft for collecting（12,12'）Rotary speed information V1With the second incremental encoder (13,13') the rolling for collecting
Cylinder (6,6') rotary speed information V2Input counter module, in the present invention, counter module prioritizing selection Siemens FM350 is counted
Device module, by Siemens FM350 counter modules to motor input shaft（2,2'）Rotary speed information V1And cylinder（6,6'）Rotating speed
Information V2Digital Signal Processing is carried out, switching signal is input to CPU module, switching information is processed by CPU module, and
Judge that winch is low or first gear to be in top gear, the high gear passed out further according to switching signal or low gear meter
Its gearratio n is calculated, in the present invention, the prioritizing selection ratio selection value of top gear is 4.862, the gearratio of low or first gear
For 9.667.
Fig. 2 also relates to the installation site figure of encoder, as shown in Fig. 2 the input in the first motor 2 and the second motor 2'
Axle（12,12'）Rear end be mounted on the first incremental encoder（5,5'）, by the first incremental encoder（5,5'）Collection
Motor input shaft（2,2'）Rotary speed information V1,In cylinder（6,6'）End the second incremental encoder is installed（13,
13'）, by the second incremental encoder（13,13'）Collection cylinder（6,6'）Rotary speed information V2.
The principle of control method of the present invention is that, when winch is in high gear, its job step is：
Rotary speed information V on a, the first incremental encoder collection motor input shaft1, and the rotary speed information V1Input
Arrive counter module；
Rotary speed information V on b, the second incremental encoder collection cylinder2, and the rotary speed information V2It is input to counting
Device module；
C, CPU module read the shift switch signal of the high gear that auxiliary contact are provided, by the high gear
Shift switch signal judges that winch, in High gear state, then calculates winch in top gear or low speed by CPU module
The gearratio n of shelves；
D, CPU module are to rotary speed information V1, rotary speed information V2, gearratio n carries out computing, if motor input shaft rotating speed V1Remove
With drum rotation speed V2Span be：
In high gear, the span of gearratio n is the auxiliary contact 4' that driving switch 4 is indicated【4.862±0.3】
（N-0.3≤V1/ V2≤n+0.3）, then CPU module judge that winch works well, and export image display panel, show and twist
Car works well；Hydraulic disc brake system does not start.
When the span of gearratio n does not exist【4.862±0.3】（N-0.3≤V1/ V2≤n+0.3）During scope, then
CPU module judges the improper operating of winch, and logic control element 1 starts warning system, and sends configured information to hydraulic disc brake
System 3, starts disc brake system 3, and winch stops, and maintenance personal overhauls.
When winch is in low gear, its job step is：
Rotary speed information V on a, the first incremental encoder collection motor input shaft1, and the rotary speed information V1Input
Arrive counter module；
Rotary speed information V on b, the second incremental encoder collection cylinder2, and the rotary speed information V2It is input to counting
Device module；
C, CPU module read the shift switch signal of the high gear that auxiliary contact are provided, by the high gear
Shift switch signal judges that winch, in High gear state, then calculates winch in top gear or low speed by CPU module
The gearratio n of shelves；
D, CPU module are to rotary speed information V1, rotary speed information V2, gearratio n carries out computing, if motor input shaft rotating speed V1Remove
With drum rotation speed V2Span be：
In low gear, the span of gearratio n is the auxiliary contact 4' that driving switch 4 is indicated【9.667±0.3】
（N-0.3≤V1/ V2≤n+0.3）, then CPU module judge that winch works well, and export image display panel, show and twist
Car works well；Hydraulic disc brake system does not start.
When the span of gearratio n does not exist【9.667±0.3】（N-0.3≤V1/ V2≤n+0.3）During scope, then
CPU module judges the improper operating of winch, and logic control element 1 starts warning system, and sends configured information to hydraulic disc brake
System 3, starts disc brake system 3, and winch stops, and maintenance personal overhauls.
With reference to shown in Fig. 3, Fig. 3 is differential control system failure normal operation picture view, when winch low gear is transported
When turning, when differential control system in normal when, i.e. cylinder（6,6'）Rotating speed and motor（2,2'）The gap value model of rotating speed
Enclose for【n±0.3】When（n=9.667）, the CPU module of winch judges winch in the state that works well.
When winch high gear operates, when differential control system in normal when, i.e. cylinder（6,6'）Rotating speed with electricity
Machine（2,2'）The gap span of rotating speed is【n±0.3】When（n=4.862）, the CPU module of winch judges winch in operating
Normal condition.
With reference to shown in Fig. 4, Fig. 4 is differential control system fault alarm picture view, and winch is in high tap position operation process
In, when differential control system is in failure, i.e. cylinder（6,6'）Rotating speed be more than or less than with the gap of motor speed【n±
0.3】（n=4.862）If, motor input shaft rotating speed V1Divided by drum rotation speed V2Value be more than（N+0.3）（V1/ V2 ＞ n+
0.3）（n=4.862）, then CPU module judge winch operating break down, CPU module sends halt instruction and gives hydraulic disc brake system
3, braked by hydraulic disc brake system 3, then shut down；If motor input shaft rotating speed V1Divided by drum rotation speed V2Take
Value is less than [n-0.3] (V1/ V2 ＜ n-0.3）（n=4.862）, then CPU module judge winch operating break down, CPU moulds
Block sends halt instruction and gives hydraulic disc brake system, is braked by hydraulic disc brake system, is then shut down.When judging winch
Operating is broken down, and after shutdown, maintenance personal is keeped in repair to winch.
Winch in low-grade location operation process, when differential control system is in failure, i.e. cylinder（6,6'）Rotating speed with
The gap of motor speed is more than or less than【n±0.3】（n=9.667）If, motor input shaft rotating speed V1Divided by drum rotation speed V2Take
Value is more than（N+0.3）（V1/ V2 ＞ n+0.3）（n=9.667）, then CPU module judge winch operating break down, CPU module
Halt instruction is sent to hydraulic disc brake system 3, is braked by hydraulic disc brake system 3, is then shut down；If motor is input into
Rotating speed V1Divided by drum rotation speed V2Value be less than [n-0.3] (V1/ V2 ＜ n-0.3）（n=9.667）, then CPU module sentence
Disconnected winch operating is broken down, and CPU module sends halt instruction to hydraulic disc brake system 3, is stopped by hydraulic disc brake system 3
Car, is then shut down.After shutdown, maintenance personal is keeped in repair to winch.
Fig. 5 is differential control system flow chart, with reference to shown in Fig. 5, starts motor 2, judges to bore by logic control element 1
Machine is in top gear or low or first gear, by the first incremental encoder（5,5'）Collection motor input shaft rotating speed V1, pass through
Second incremental encoder（13,13'）Collection motor input shaft rotating speed V2, then n=V is calculated by logic control element 11/V2, such as
Fruit judge rig in top gear when, then motor input shaft（12,12'）Rotating speed V1Divided by cylinder (6,6') rotating speed V2Value model
Enclose be【4.362≤n=V1/V2≤5.162】When, logic control element 1 judges rig in a normal operation, if
Judge motor input shaft in rig（（12,12'）Rotating speed V1Divided by cylinder (6,6') rotating speed V2Span do not exist【4.362≤
n=V1/V2≤5.162】When, logic control element 1 judges rig in an improper operating condition, and logic control element 1 is given
Rig sends the signal that shuts down, and promotes rig to shut down, and maintenance personal is overhauled.If it is determined that low or first gear at rig
When, then motor input shaft（12,12'）Rotating speed V1Divided by cylinder (6,6') rotating speed V2Span be【9.367≤n=V1/V2
≤9.967】When, logic control element 1 judges rig in a normal operation, if it is determined that motor input shaft in rig
（12,12'）Rotating speed V1Divided by cylinder (6,6') rotating speed V2Span do not exist【9.367≤n=V1/V2≤9.967】When, logic
Control unit 1 judges rig in an improper operating condition, and logic control element 1 sends to disc brake brake system 3 and stops stopping
Car configured information, motor（2,2'）Shut down, maintenance personal is overhauled.
Embodiment described above only expresses embodiments of the present invention, and which is described more in detail, as long as the skill of this area
Art personnel after embodiments of the invention are viewed, without departing from present inventive concept on the premise of, the change that is made belongs to this
Bright protection domain.But embodiment as herein described is it is not intended that limit to protection scope of the present invention.
Claims (6)
1. a kind of oil-well rig folk art term winch differential electronic control system, it is characterised in that the electronic control system includes：
Motor（2,2'）, motor input shaft（12,12'）, installed in motor input shaft（12,12'）On the first increment type coding
Device（5,5'）, first incremental encoder（5,5'）For gathering motor input shaft（12,12'）On rotary speed information V1；
Cylinder（6、6'）, the second incremental encoder (13,13') on cylinder, second incremental encoder
(13,13') it is used for gathering cylinder（6、6'）On rotary speed information V2；
Winch shift switch (4), described winch shift switch (4) are used for the gear for changing winch；
(4'), (4') the auxiliary contact are arranged at winch shift switch auxiliary contact, and (4') the auxiliary contact export and change
Stop OFF signal；
Logic control element (1), described logic control element (1) are that winch central authorities process control system, the logic control list
Counter module is provided with first (1), the counter module is used for the first incremental encoder of computing and analysis（5,5'）With
Two incremental encoders（6,6'）The rotary speed information of output（V1、V2）；The logic control element（1）CPU module, institute are inside provided with
State CPU module for process and computing auxiliary contact export switching signal；
Hydraulic disc brake system (3), described hydraulic disc brake system (3) are used for the operating for controlling winch；
Image display panel（6）, described image display screen（6）For showing the operating condition of winch.
2. folk art term winch differential electronic control system according to claim 1, it is characterised in that the counter module is
Siemens's FM350 counters.
3. folk art term winch differential electronic control system according to claim 1, it is characterised in that the switching signal passes through
CPU module digital quantity input port is input to CPU module.
4. folk art term winch differential electronic control system according to claim 1, it is characterised in that the winch shift switch
(4) gear in is divided into two gears of low or first gear and top gear.
5. a kind of oil-well rig folk art term winch differential speed control method, it is characterised in that the control method comprising the step of have：
A, the first incremental encoder（5,5'）Collection motor input shaft（2,2'）On rotary speed information V1, and the rotating speed is believed
Breath V1It is input to counter module；
B, the second incremental encoder（13,13'）Rotary speed information V on collection cylinder2, and the rotary speed information V2It is input to
Counter module；
C, CPU module read auxiliary contact（4'）The shift switch signal for being given, judges winch by the shift switch signal
In top gear or low-gearing regime, gearratio n is taken out from register corresponding address by CPU module then：The top gear
Gearratio n values are 4.862, and the low or first gear gearratio n values are 9.667；
D, CPU module are to rotary speed information V1, rotary speed information V2, gearratio n carries out computing, if：
Ⅰ）, motor input shaft rotating speed V1 is divided by drum rotation speed V2Span be：
【n±0.3】（N-0.3≤V1/ V2≤ n+0.3）, then CPU module judge that winch works well, and export image show
Display screen, shows that winch works well；
II), motor input shaft（12,12'）Rotating speed V1 is divided by cylinder（6,6'）Rotating speed V2Value be more than【N+0.3】（V1/ V2
＞ n+0.3）, then CPU module judge winch operating break down, CPU module sends halt instruction and gives hydraulic disc brake system（3）,
By hydraulic disc brake system（3）Braked, then shut down；
III), motor input shaft rotating speed V1 is divided by drum rotation speed V2Value be less than【N-0.3】（V1/ V2＜ n-0.3）, then CPU
Module judges that winch operating is broken down, and CPU module sends halt instruction and gives hydraulic disc brake system（3）, by hydraulic disc brake system
System（3）Braked, then shut down.
6. oil-well rig folk art term winch differential speed control method according to claim 5, it is characterised in that when judging that winch transports
Turn to break down, after shutdown, maintenance personal keeps in repair winch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410749730.1A CN104444901B (en) | 2014-12-10 | 2014-12-10 | A kind of oil-well rig folk art term winch electronic differential control system and control method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410749730.1A CN104444901B (en) | 2014-12-10 | 2014-12-10 | A kind of oil-well rig folk art term winch electronic differential control system and control method |
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| Publication Number | Publication Date |
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| CN104444901A CN104444901A (en) | 2015-03-25 |
| CN104444901B true CN104444901B (en) | 2017-03-15 |
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| CN113879998B (en) * | 2021-10-20 | 2023-03-10 | 天水电气传动研究所集团有限公司 | Method for protecting broken shaft of petroleum drilling machine winch |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10339440A1 (en) * | 2003-08-25 | 2005-04-07 | Demag Cranes & Components Gmbh | Method for monitoring a chain hoist and chain hoist |
| US7063306B2 (en) * | 2003-10-01 | 2006-06-20 | Paccar Inc | Electronic winch monitoring system |
| CN100357171C (en) * | 2005-02-01 | 2007-12-26 | 太原重型机械集团有限公司 | Lifting mechanism braking system of hoister |
| CN102849643B (en) * | 2011-06-29 | 2017-02-15 | 中联重科股份有限公司 | Hydraulic hoisting mechanism fault judgment method and system |
| CN202729622U (en) * | 2012-01-10 | 2013-02-13 | 西门子工厂自动化工程有限公司 | Protective device of crane and crane |
| CN103523689B (en) * | 2013-10-25 | 2015-12-09 | 西安宝美电气工业有限公司 | Efficient intelligent safety petroleum drilling winch system and control method thereof |
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