CN105583397A - Non-heating automatic casting machine - Google Patents
Non-heating automatic casting machine Download PDFInfo
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- CN105583397A CN105583397A CN201610168683.0A CN201610168683A CN105583397A CN 105583397 A CN105583397 A CN 105583397A CN 201610168683 A CN201610168683 A CN 201610168683A CN 105583397 A CN105583397 A CN 105583397A
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- laser
- scarfing cinder
- stopper rod
- casting machine
- right movement
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D39/00—Equipment for supplying molten metal in rations
- B22D39/02—Equipment for supplying molten metal in rations having means for controlling the amount of molten metal by volume
- B22D39/026—Equipment for supplying molten metal in rations having means for controlling the amount of molten metal by volume using a ladler
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
The invention discloses a non-heating automatic casting machine which comprises a laser sensing system, an automatic steam inoculation system, a control system, a weighing system, a hydraulic system, a laser generator device, a casting and packaging device, a residue removal device, a plug stick device and a movement mechanism. The casting machine is reasonable in design; by means of the laser sensing system, the liquid level change situation of a high-temperature solution can be detected in real time, liquid level change signals are reliably and continuously output, a plug stick can be precisely controlled, and the liquid level of a sprue cup can be precisely controlled; the function that the casting machine automatically looks for the sprue cup when the position of the spure cup changes is achieved. By means of the casting machine, the labor intensity of workers is greatly lowered, harms caused to eyes when workers check high-temperature and high-brightness metal solutions for a long time are avoided, and true unmanned operation is achieved. By means of the casting machine, stability of products is improved, a large amount of metal solution waste caused by manual operation is greatly decreased, cost is saved, the production efficiency is improved, and therefore economic benefits are improved.
Description
Technical field
The present invention relates to a kind of apparatus for pouring, specifically a kind of non-heating automatic pouring machine.
Background technology
Casting machine be exactly melt a metallic solution pour in a container, then by the container of tumbling pour into or by control containerBottom opening position flow into by moulding machine carry come mould form in, in casting process, control in flow model die cavityThe flow velocity of metallic solution and time, thus ensure that liquid level in cup keeps constant in certain liquid level, continuous pouring. NoOwe the machine that waters, stops cast and overflow. Existing casting machine general control mode is manual or semi-automatic mode, passes throughManually controlling stopper rod lifts and closes or the flow velocity of the tilt angle control metallic solution of the turn-up mechanism that inclines is poured into a mould. Manually castTo be operating personnel control metallic solution and enter the flow velocity in mould form by controlling the lifting of control stick control stopper rod modeAnd flow, manually the shortcoming of pouring type is that poring rate is slow, and control procedure is unstable, and workman constantly repeats for several thousand times every dayMechanical action, workman very easily produces fatigue, easily occurs that cast owe to water, stop cast and cast the problem such as overflow, easilyCause product quality unstable, waste a large amount of metallic solutions. Semi-automatic pouring type is manually to control in the time of cast the first modelOperating grip cast, this time running orbit of operating grip in casting process of duplicated record in control system simultaneously, the first mouldAfter type is poured, the running orbit control stopper rod that forwards the copy operation handle that semi-automatic pattern can be mechanical to waters automaticallyNote, does not need people's participation in a period of time, although this pattern can alleviate operating personnel's part labour intensity, due toThe action that copies for the first time cast of machinery, when the liquid level in cast container changes, or cast bore premature becomes largeOr in accumulation residue situation about diminishing, can affect flow and the flow velocity of cast, do not have thereby there will be within certain duration of pouringWater full or the problem such as overflow, affecting the stability of the quality of product.
Summary of the invention
The object of the present invention is to provide a kind of non-heating automatic pouring machine, to solve the problem proposing in above-mentioned background technology.
For achieving the above object, the invention provides following technical scheme:
A kind of non-heating automatic pouring machine, comprise laser sensing system, automatically current-following inoculation system, control system, weighing isSystem, hydraulic system, laser generator device, pouring ladle assembling device, slag cleaning device, stopper rod device and travel mechanism, described inTravel mechanism comprises left/right movement device and move forward and backward mechanism, and weighing system comprises four weighing and sensings that are arranged on columnWeighing controller in device and control room, laser sensing system, automatically current-following inoculation system, weighing system, hydraulic system,Laser generator device, pouring ladle assembling device, slag cleaning device, stopper rod device and travel mechanism are installed on four columns,Move forward and backward the top that mechanism is positioned on column and moves forward and backward mechanism and be positioned at weighing system, pouring ladle assembling device is positioned at left and rightTravel mechanism above and be placed on the position of middle, slag cleaning device and stopper rod device are arranged on left/right movement device belowCentre position, the both sides of pouring ladle assembling device are provided with laser generator device and laser sensor system, laser sensing systemWith laser generator installation composition laser liquid-level measuring system, control system is positioned at the rear of pouring ladle assembling device, pouring ladleAssembling device comprises supporting seat, mould, housing and sprue gate, and three supporting seats are welded on housing, and sprue gate is by threeSupport seat is placed on three alignment pins in centre position of left/right movement device, and mould is fixed in housing, at mould and housingBetween space in inject refractory material, hydraulic system is placed in fixed platform, the oil pipe of hydraulic system respectively with water cladBe connected with the oil cylinder of tilting mechanism, automatically current-following inoculation system be fixed on left/right movement device above, current-following inoculation automaticallyThe discharging nozzle that pipe breeds in system extends to below, sprue gate, and stopper rod device comprises that driver, stopper rod clamping limb and stopper rod clamp dressPut, driver comprises servomotor, timing belt pulley, synchronous belt, ball screw, driving shaft, limit switch, inductionCover and drive connecting plate, servomotor is arranged on the side driving on connecting plate, ball screw be arranged on drive connecting plate anotherSide, a timing belt pulley of the each installation of axle head of servomotor and ball screw, transmits motor driving force by synchronous belt,Bearing flange and the driving shaft of ball screw link together by screw, and the top of stopper rod clamping limb and driving shaft is solid with screwFixed, stopper rod clamping limb front end has half-open nut apparatus and a retaining mechanism for locking.
As the further scheme of the present invention: slag cleaning device comprise scarfing cinder cylinder, scarfing cinder bar, scarfing cinder arm, scarfing cinder support column,Scarfing cinder safety door and Pneumatic control cabinet, scarfing cinder cylinder stands upside down and is arranged on scarfing cinder arm, and scarfing cinder cylinder adopts scarfing cinder support column to support,The scarfing cinder of scarfing cinder cylinder is moved by Pneumatic solenoid valves control.
As the further scheme of the present invention: laser sensing system comprise laser sensor, water(-cooling) jacket, laser water cooling unit andBlower fan, the optical source wavelength of laser transmitter projects is 532nm or 450nm, laser sensor inside is provided with camera lens, optical filteringSheet, reception mirror, speculum, signal processing control circuit plate and intelligent industrial camera.
As the further scheme of the present invention: current-following inoculation system comprises hopper, tachogenerator, blowning installation, straight automaticallyStream motor, incremental encoder, electric machine controller, pressure sensor, flow sensor and level sensor control system.
As the further scheme of the present invention: left/right movement device and move forward and backward mechanism and all adopt motor or hydraulic oil cylinder driving alsoAnd left/right movement device is placed on and moves forward and backward on mechanism.
As the further scheme of the present invention: laser liquid-level measuring system be placed on pouring ladle assembling device both sides and with model faceBe miter angle, laser liquid-level measuring system and cup are on same vertical center line.
Compared with prior art, the invention has the beneficial effects as follows: this device is reasonable in design, can be real by laser sensing systemTime detect the liquid level situation of change of pyrosol, and reliable continuous output liquid level variable signal is by control system, can be accurateControl stopper rod, cup liquid level can be controlled accurately; Realized in the time of cup change in location, casting machine is automaticFind the function of cup, i.e. automatic positioning function; This device has alleviated workman's labour intensity greatly, has avoided due to lengthTime checks that the metallic solution of high temperature and high brightness is to the injury of eyes, has realized real unattended; This device has improvedThe stability of product, greatly reduces the waste that causes a large amount of metallic solutions due to manual operation, has saved cost, improvesThereby production efficiency improved economic benefit, result of use is good.
Brief description of the drawings
Fig. 1 is the front view of non-heating automatic pouring machine.
Fig. 2 is the side view of non-heating automatic pouring machine.
Fig. 3 is the structural representation of pouring ladle assembling device in non-heating automatic pouring machine.
Fig. 4 is the structural representation of slag cleaning device and stopper rod device in non-heating automatic pouring machine.
Fig. 5 is the structural representation of driver in non-heating automatic pouring machine.
Fig. 6 is the structural representation of automatic current-following inoculation system in non-heating automatic pouring machine.
Wherein: 1-laser sensing system, the automatic current-following inoculation system of 2-, 3-control system, 4-weighing system, 5-hydraulic pressure systemSystem, 6-left/right movement device, 7-laser generator device, 8-pouring ladle assembling device, 9-slag cleaning device, 10-stopper rod device,11-moves forward and backward mechanism, 12-housing, 13-mould, 14-supporting seat, 15-sprue gate, 16-scarfing cinder cylinder, 17-scarfing cinderBar, 18-scarfing cinder arm, 19-scarfing cinder support column, 20-scarfing cinder safety door, 21-Pneumatic control cabinet, 22-driver, 23-stopper rodClamping limb, 24-stopper rod clamping device, 25-servomotor, 26-timing belt pulley, 27-synchronous belt, 28-ball screw,29-driving shaft, 30-limit switch, 31-responds to cover, and 32-drives connecting plate, 33-hopper, 34-tachogenerator, 35-Blowning installation, 36-direct current generator, 37-incremental encoder, 38-electric machine controller, 39-pressure sensor, 40-flow passesSensor, 41-level sensor control system.
Detailed description of the invention
Below in conjunction with detailed description of the invention, the technical scheme of this patent is described in more detail.
Refer to Fig. 1-6, a kind of non-heating automatic pouring machine, comprise laser sensing system 1, automatically current-following inoculation system 2,Control system 3, weighing system 4, hydraulic system 5, laser generator device 7, pouring ladle assembling device 8, slag cleaning device 9,Stopper rod device 10 and travel mechanism, described travel mechanism comprises left/right movement device 6 and moves forward and backward mechanism 11, weighing isSystem 4 comprises four weighing controllers in LOAD CELLS and the control room being arranged on column, laser sensing system 1, fromMoving current-following inoculation system 2, weighing system 4, hydraulic system 5, laser generator device 7, pouring ladle assembling device 8, scarfing cinderDevice 9, stopper rod device 10 and travel mechanism are installed on four columns, move forward and backward that mechanism 11 is positioned on column andMove forward and backward the top that mechanism 11 is positioned at weighing system 4, pouring ladle assembling device 8 be positioned at left/right movement device 6 above alsoBe placed on the position of middle, slag cleaning device 9 and stopper rod device 10 are arranged on left/right movement device 6 centre position below,The both sides of pouring ladle assembling device 8 are provided with laser generator device 7 and laser sensor system 1, laser sensing system 1 HeLaser generator device 7 forms laser liquid-level measuring system, and control system 3 is positioned at the rear of pouring ladle assembling device 8, watersNote packing device 8 comprises that supporting seat 14, mould 13, housing 12 and 15, three, sprue gate supporting seat 14 are welded on housingOn 12, sprue gate 15 is placed on by three supporting seats 14 on three alignment pins in centre position of left/right movement device 6,Mould 13 is fixed in housing 12, injects refractory material, hydraulic system 5 in the space between mould 13 and housing 12Be placed in fixed platform, the oil pipe of hydraulic system 5 is connected with the oil cylinder that waters clad and tilting mechanism respectively, automatically with streamBreed system 2 be fixed on left/right movement device 6 above, automatically current-following inoculation is that the 2 discharging nozzles that breed pipe extend to and waterGeat 15 belows, stopper rod device 10 comprises driver 22, stopper rod clamping limb 23 and stopper rod clamping device 24, driver 22Comprise servomotor 25, timing belt pulley 26, synchronous belt 27, ball screw 28, driving shaft 29, limit switch 30,Induction cover 31 and driving connecting plate 32, servomotor 25 is arranged on the side driving on connecting plate 32, and ball screw 28 is pacifiedBe contained in and drive connecting plate 32 opposite sides, a timing belt pulley 26 of the each installation of axle head of servomotor 25 and ball screw 28,Transmit motor driving force by synchronous belt 27, the bearing flange of ball screw 28 and driving shaft 29 are connected to by screwTogether, stopper rod clamping limb 23 is screwed with the top of driving shaft 29, and stopper rod clamping limb 23 front ends have one for lockTight half-open nut apparatus and a retaining mechanism. Slag cleaning device 9 comprise scarfing cinder cylinder 16, scarfing cinder bar 17, scarfing cinder arm 18,Scarfing cinder support column 19, scarfing cinder safety door 20 and Pneumatic control cabinet 21, scarfing cinder cylinder 16 stands upside down and is arranged on scarfing cinder arm 18,Scarfing cinder cylinder 16 adopts scarfing cinder support column 19 to support, and the scarfing cinder of scarfing cinder cylinder 16 is moved by Pneumatic solenoid valves control.Laser sensing system comprises laser sensor, water(-cooling) jacket, laser water cooling unit and blower fan, the light source ripple of laser transmitter projectsLong is 532nm or 450nm, and laser sensor inside is provided with camera lens, optical filter, reception mirror, speculum, signal processingControl circuit board and intelligent industrial camera. Automatically current-following inoculation system 2 comprises hopper 33, tachogenerator 34, blowing fillsPut 35, direct current generator 36, incremental encoder 37, electric machine controller 38, pressure sensor 39, flow sensor 40 andLevel sensor control system 41. Left/right movement device 6 and move forward and backward mechanism 11 and all adopt motor or hydraulic oil cylinder driving alsoAnd left/right movement device 6 is placed on and moves forward and backward on mechanism 11. Laser liquid-level measuring system is placed on pouring ladle assembling device 8Both sides and be miter angle with model face, laser liquid-level measuring system and cup are on same vertical center line.
Operation principle of the present invention is: in the time that needs are poured into a mould, moulding machine is released empty sand mold and in course of conveying, laserSensor-based system 1 sends a laser and surveys cup position, when finding after cup, and some laser shutdown, then laser occursApparatus 7 is opened and is launched laser rays, and reflection laser rays enters laser sensing system 1, checks that whether cup is normal,If there is skew in cup position and pouring mouth place-centric, stop cast, enter automatic finder, system is sent instructionMove left and right the cup central alignment on pouring mouth and the sand mold that makes pouring ladle assembling device 8 to left/right movement device 6, left and right is movedActuation mechanism 6 has displacement transducer to detect in real time pouring mouth position, and simultaneously moulding machine can provide the signal of sand mold position, by thanWhether the position of determining pouring mouth and cup compared with two signals aligns, and pours into a mould, if site error exists after the adjustment of positionAllow can directly pour into a mould within the scope of cast, without positioning. Be poured rear inspection scarfing cinder function and whether open,If opened, carry out scarfing cinder operation, after scarfing cinder, automatically enter the cast of next model, if do not activated, directly certainlyThe moving cast that can enter next model, is poured rear line laser and closes. Casting process is divided into and starts cast, middle controlPart and cast finish, and are controlling system, and liquid level curve values and the duration of pouring in pre-set cup in 3, by arranging plugBar offset value is also relatively controlled the beginning of cast with stopper rod physical location, when liquid level in cup is elevated to certain heightDegree, when the laser rays namely sending when laser generator device 7 reflexes to laser sensing system 1 by liquid level, enters and watersControl section in the middle of note second stage, now laser sensing system 1 can real-time level monitoring situation of change and liquid level set value intoRelatively, passing ratio integration is eliminated the size of error control stopper rod opening to row, when setting while finishing the duration of pouring, and shut-off plugLever apparatus 10, finishes this time cast. Laser sensing system 1 and laser generator device 7 compositions are used for measuring cup liquid levelThe laser measurement system changing, laser measurement system is signal feedback to control system 3, and control system 3 is sent instruction controlStopper rod device 10, accurately to control the liquid level of cup, current-following inoculation system 2 is selected by control according to product requirement automaticallyOpen or close the operation of this system, in the time that left/right movement device 6 moves left and right, can drive pouring ladle assembling device 8 left togetherMove right. Move forward and backward on mechanism 11 because left/right movement device 6 is placed on, move so work as front and back travel mechanism 11Time, pouring ladle assembling device 8 and left/right movement device 6 can together with move forward and backward, pouring ladle assembling device 8 is divided into 0.6 ton, 1.0Ton, the different capabilities such as 1.5 tons. System can check that before starting to pour into a mould whether automatic current-following inoculation system 2 is in opening,If opened, before starting prerequisite, cast moves automatic current-following inoculation system 2, and make inovulant and metallic solution flow the same timeEnter cup, before cast finishes prerequisite, finish to breed system operation, make to breed system and stop before cast finishes prerequisite.Because if current-following inoculation system 2 is moved and be there will be inovulant than the late 1-2 of metallic solution with stopper rod device 10 automatically simultaneouslyTo cup, have part solution not add inovulant second, if simultaneously out of service, there will be after not pouring into a mould and still haveInovulant flows into cup, does not just breed outflow after having time delay 1-2 second, wastes a large amount of inovulants, and reason is from breeding dressPut between cup and have 1 meter of left and right copper pipe, inovulant flows in pipeline can elapsed time. Automatically current-following inoculation system2 range of flow is 1-26 Grams Per Second, and precision is 5%. Before moving automatic current-following inoculation system 2, need to input institute according to productThe flow needing, system obtains turning round after instruction and automatically selects rotating speed according to the grams of input, in running according to encoderWith speed probe feedback monitoring motor speed in real time, control the precise and stable operation of motor. When helical feed wear extent excessiveOr putty, blow afloat pressure oscillation excessive, in the situation of instability of flow, send warning message, stop automatic current-following inoculation systemSystem 2 runnings stop cast simultaneously, avoid producing defective products, have ensured the reliability of product.
This device is reasonable in design, can detect in real time the liquid level situation of change of pyrosol by laser sensing system 1, and canBy control system 3, can control accurately stopper rod by continuous output liquid level variable signal, cup liquid level can obtain essenceAccurate control; The function of casting machine Automatic-searching cup, i.e. automatic positioning function are realized in the time of cup change in location;This device has alleviated workman's labour intensity greatly, has avoided because the metallic solution of checking for a long time high temperature and high brightness is to eyeThe injury of eyeball, has realized real unattended; This device has improved the stability of product, greatly reduces due to artificial behaviourDo and cause the waste of a large amount of metallic solutions, saved cost, thereby having improved production efficiency having improved economic benefit, usingEffective.
Above the preferred embodiments of this patent is explained in detail, but this patent is not limited to above-mentioned embodiment,In the ken that those of ordinary skill in the art possesses, can also under the prerequisite that does not depart from this patent aim, make eachPlant and change.
Claims (6)
1. a non-heating automatic pouring machine, is characterized in that, comprise laser sensing system, automatically current-following inoculation system,Control system, weighing system, hydraulic system, laser generator device, pouring ladle assembling device, slag cleaning device, stopper rod deviceAnd travel mechanism, described travel mechanism comprises left/right movement device and move forward and backward mechanism, weighing system comprises that four are arranged onWeighing controller in LOAD CELLS and control room on column, laser sensing system, automatically current-following inoculation system, weighSystem, hydraulic system, laser generator device, pouring ladle assembling device, slag cleaning device, stopper rod device and travel mechanism are all pacifiedBe contained on four columns, move forward and backward the top that mechanism is positioned on column and moves forward and backward mechanism and be positioned at weighing system, castPacking device be positioned at left/right movement device above and be placed on the position of middle, slag cleaning device and stopper rod device are arranged on a left sideThe mechanism centre position below that moves right, the both sides of pouring ladle assembling device are provided with laser generator device and laser sensor systemSystem, laser sensing system and laser generator installation composition laser liquid-level measuring system, control system is positioned at pouring ladle assembling deviceRear, pouring ladle assembling device comprises supporting seat, mould, housing and sprue gate, three supporting seats are welded on housing,Sprue gate is placed on by three supporting seats on three alignment pins in centre position of left/right movement device, and mould is fixed on housingIn, in the space between mould and housing, inject refractory material, hydraulic system is placed in fixed platform, hydraulic systemOil pipe is connected with the oil cylinder that waters clad and tilting mechanism respectively, and current-following inoculation system is fixed on the upper of left/right movement device automaticallyFace, current-following inoculation is that the discharging nozzle that breeds pipe extends to below, sprue gate automatically, stopper rod device comprises driver, stopper rod folderGripping arm and stopper rod clamping device, driver comprise servomotor, timing belt pulley, synchronous belt, ball screw, driving shaft,Limit switch, induction cover and driving connecting plate, servomotor is arranged on the side driving on connecting plate, and ball screw is arranged onDrive connecting plate opposite side, a timing belt pulley of the each installation of axle head of servomotor and ball screw, passes by synchronous beltPass motor driving force, bearing flange and the driving shaft of ball screw link together by screw, stopper rod clamping limb and driving shaftTop be screwed, stopper rod clamping limb front end has half-open nut apparatus and a retaining mechanism for locking.
2. non-heating automatic pouring machine according to claim 1, is characterized in that, described slag cleaning device comprises scarfing cinderCylinder, scarfing cinder bar, scarfing cinder arm, scarfing cinder support column, scarfing cinder safety door and Pneumatic control cabinet, scarfing cinder cylinder stands upside down and is arranged on clearlyOn slag arm, scarfing cinder cylinder adopts scarfing cinder support column to support, and the scarfing cinder of scarfing cinder cylinder is moved by Pneumatic solenoid valves control.
3. non-heating automatic pouring machine according to claim 1 and 2, is characterized in that described laser sensing systemComprise laser sensor, water(-cooling) jacket, laser water cooling unit and blower fan, the optical source wavelength of laser transmitter projects be 532nm or450nm, laser sensor inside be provided with camera lens, optical filter, reception mirror, speculum, signal processing control circuit plate andIntelligent industrial camera.
4. non-heating automatic pouring machine according to claim 3, is characterized in that, described automatic current-following inoculation systemComprise hopper, tachogenerator, blowning installation, direct current generator, incremental encoder, electric machine controller, pressure sensor,Flow sensor and level sensor control system.
5. non-heating automatic pouring machine according to claim 4, is characterized in that described left/right movement device and frontRear travel mechanism all adopts motor or hydraulic oil cylinder driving and left/right movement device to be placed on and moves forward and backward on mechanism.
6. non-heating automatic pouring machine according to claim 5, is characterized in that, described laser liquid-level measuring systemBe placed on pouring ladle assembling device both sides and be miter angle with model face, laser liquid-level measuring system and cup hang down sameOn straight center line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610168683.0A CN105583397B (en) | 2016-03-23 | 2016-03-23 | A kind of non-heated automatic pouring machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610168683.0A CN105583397B (en) | 2016-03-23 | 2016-03-23 | A kind of non-heated automatic pouring machine |
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| CN105583397A true CN105583397A (en) | 2016-05-18 |
| CN105583397B CN105583397B (en) | 2017-06-09 |
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| CN201610168683.0A Expired - Fee Related CN105583397B (en) | 2016-03-23 | 2016-03-23 | A kind of non-heated automatic pouring machine |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110238355A (en) * | 2019-06-06 | 2019-09-17 | 东风本田汽车有限公司 | Thermometric dehydrogenation weigh with station integrated equipment and its weighing thermometric dehydrogenating process |
| CN111112592A (en) * | 2020-01-14 | 2020-05-08 | 合肥工业大学 | Molten metal filling equipment |
| CN112045153A (en) * | 2020-09-10 | 2020-12-08 | 纪可薇 | Intelligent stream inoculation device and stream inoculation method |
| CN112834604A (en) * | 2020-12-31 | 2021-05-25 | 中国石油大学(华东) | Gear type detection probe carrying device and oil pipe field electromagnetic flaw detection method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110238355A (en) * | 2019-06-06 | 2019-09-17 | 东风本田汽车有限公司 | Thermometric dehydrogenation weigh with station integrated equipment and its weighing thermometric dehydrogenating process |
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| CN112834604A (en) * | 2020-12-31 | 2021-05-25 | 中国石油大学(华东) | Gear type detection probe carrying device and oil pipe field electromagnetic flaw detection method thereof |
| CN112834604B (en) * | 2020-12-31 | 2022-07-15 | 中国石油大学(华东) | Gear type detection probe carrying device and oil pipe field electromagnetic flaw detection method thereof |
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| CN105583397B (en) | 2017-06-09 |
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