CN108590635A - Universal servo-actuated collar detecting device - Google Patents
Universal servo-actuated collar detecting device Download PDFInfo
- Publication number
- CN108590635A CN108590635A CN201810721626.XA CN201810721626A CN108590635A CN 108590635 A CN108590635 A CN 108590635A CN 201810721626 A CN201810721626 A CN 201810721626A CN 108590635 A CN108590635 A CN 108590635A
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- Prior art keywords
- sliding slot
- probe
- detecting head
- spring
- closure
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- 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.)
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- 238000001514 detection method Methods 0.000 claims abstract description 41
- 239000000523 sample Substances 0.000 claims abstract description 40
- 238000003780 insertion Methods 0.000 claims abstract description 13
- 230000037431 insertion Effects 0.000 claims abstract description 13
- 238000007789 sealing Methods 0.000 claims description 16
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 2
- 238000005259 measurement Methods 0.000 abstract description 5
- 238000006073 displacement reaction Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 241001269238 Data Species 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000003032 molecular docking Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000009751 slip forming Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/09—Locating or determining the position of objects in boreholes or wells, e.g. the position of an extending arm; Identifying the free or blocked portions of pipes
Landscapes
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Geophysics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Length Measuring Devices With Unspecified Measuring Means (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
A kind of universal servo-actuated collar detecting device, belongs to oil field equipment field.The object of the present invention is to provide a kind of multi-direction servo-actuated detection, detecting head is servo-actuated, universal measurement, the universal servo-actuated collar detecting device fitted closely with oil pipe.The probe assembly of the present invention is mounted on detection device sheath body；It is that oil pipe is inserted into chamber inside detection device sheath body, is abutted flange up and down, sliding slot insertion groove is provided on the outside of detection device sheath body, sliding slot insertion groove and oil pipe is provided with probe channel between being inserted into chamber.Structure of the invention is compact, easy for operation, measures accurate, can take out oil convenient for well workover with the servo-actuated detection of multiple directions, detecting head return, and detecting head is servo-actuated, universal measurement, is fitted closely with oil pipe, and well head is easily installed, and when well workover can remove this equipment.
Description
Technical field
The invention belongs to oil field equipment fields.
Background technology
Oil is the more extensive energy of existing social application, but some oil are contained in underground layer deeper, are opening
A large amount of box cupling docking oil pipe is needed to be exploited when adopting, so, the switching performance of box cupling is often that entire oil producing operation closes very much
The technology of key, so, it is necessary to box cupling progressive can be detected, existing detection has magnetic method detection, electron detection device etc., but big
Part is solved with improving the performance indicator of box cupling product.Although also having corresponding detection about collar location, offset etc.,
Accuracy has corresponding deviation.
Invention content
The object of the present invention is to provide a kind of multi-direction servo-actuated detection, detecting head is servo-actuated, universal measurement, is closely pasted with oil pipe
The universal servo-actuated collar detecting device closed.
The probe assembly of the present invention is mounted on detection device sheath body；It is that oil pipe is inserted into chamber inside detection device sheath body, on
Under be abutted flange, be provided with sliding slot insertion groove on the outside of detection device sheath body, sliding slot insertion groove and oil pipe are provided between being inserted into chamber
Probe channel；
Probe assembly：Mainly there are detecting head accessory part and adjustment component to constitute；
Detecting head accessory part：Including sliding slot, detecting head, sealing Z-type lid, resetting spring, closure；Sliding slot is inserted into sliding slot
In insertion groove, closure is sleeved on the outside of the top board and seat board of sliding slot, and closure is fixed on detection device sheath body
On, sealing Z-type lid is installed with outside closure；
Sliding slot is made of top board, backboard, seat board, and the position in corresponding probe channel is provided with probe and wears on the backboard of sliding slot
Hole is seat board below sliding slot, and intralamellar part of being present is equipped with limiting slot, is placed with spring front stall in the limiting slot of seat board, before spring
It is integrated detecting head slide fixed thereto on seat, the position of corresponding probe perforation is provided with probe undergauge on spring front stall, visits
The internal diameter of head undergauge is less than probe punch inside diameter, and detecting head is made of major diameter leading portion, path back segment and undergauge chuck, before major diameter
End stretches into oil pipe across probe channel and probe perforation and is inserted into intracavitary, and path back segment passes through probe undergauge to stretch into inside sliding slot, contracts
Diameter chuck is stuck on spring front stall, and resetting spring front end sleeve is withstood on path back segment on spring front stall, in closure
Spring back seat is installed, resetting spring tail end is withstood in spring back seat on rear side backboard；It is provided with guide rail in detecting head slide side
Slot, guide-track groove are sleeved on sliding rail, and sliding rail one end is fixed at guide rail fixing groove on the chute, and the other end is fixed on spring back seat
On；It is installed with baffle on the detection device sheath body that sliding slot corresponds to sliding rail side, has sliding rail at corresponding rails slot on baffle
Block；It is installed with extension item in base rear end, extends item and closure and sealing Z-type lid is passed through to stretch into adjustment assembly chambeies
It is fixed with sliding slot mounting blocks；It is set with adjustment shell in sealing Z-type outer side of lid, adjustment enclosure interior is adjustment assembly chambeies, hydraulic pressure
The cylinder body of cylinder is fixed on adjustment hull outside, and the hydraulic stem of hydraulic cylinder passes through adjustment shell to stretch into adjustment assembly chambeies, in hydraulic pressure
Boom end is equipped with sliding slot adjustment block, and corresponding pin hole is provided on sliding slot adjustment block and sliding slot mounting blocks；On adjustment shell
It is provided with installing port, installing port lid is stamped on installing port.
The present invention is provided with sliding slot cavity pressure detection mouth on closure.
Structure of the invention is compact, easy for operation, measures accurately, can be detected so that multiple directions are servo-actuated, detecting head return,
Oil is taken out convenient for well workover, and detecting head is servo-actuated, universal measurement, is fitted closely with oil pipe, and well head is easily installed, and when well workover can remove this
Equipment.
Description of the drawings
Fig. 1 is structure of the invention sectional view；
Fig. 2 is detection device sheath body sectional view of the present invention；
Fig. 3 is sliding slot of the present invention and associated component connection relation structural schematic diagram；
Fig. 4 is sliding groove structure schematic diagram of the present invention；
Fig. 5 is spring front stall, detecting head slide and associated component connection relationship diagram of the present invention；
Fig. 6 is the A-A schematic diagrames of Fig. 1 of the present invention；
Fig. 7 is that probe assembly of the present invention is connected status diagram with detection device sheath body；
Fig. 8 is measuring probe structure schematic diagram of the present invention.
Specific implementation mode
The probe assembly 26 of the present invention is mounted on detection device sheath body 1；1 inside of detection device sheath body is that oil pipe is inserted into chamber
18, it is abutted flange 19 up and down, is provided with sliding slot insertion groove 20 in 1 outside of detection device sheath body, sliding slot insertion groove 20 is inserted with oil pipe
Enter to be provided between chamber 18 probe channel 21；Detection device sheath body 1 is a sleeve-like configuration, and abutted flange 19 is aspect with above and below
The component of connection, the detecting head 2 on probe assembly 26 put in, be contacted with the oil pipe of insertion from probe channel 21.
Probe assembly 26：Mainly there are detecting head accessory part and adjustment component to constitute；Probe assembly 26 is the pass of the present invention
Key asembly, all detection datas are obtained by this component.
Detecting head accessory part：Including sliding slot 4, detecting head 2, sealing Z-type lid 15, resetting spring 5, closure 3, sealing
Z-type lid 15 and closure 3 are the shell supports of entire front end detection dog accessory part, they are integrally fixed at detection device set
On shell 1, and one detecting head activity space of internal formation；Sliding slot 4 is inserted into sliding slot insertion groove 20, can be inserted into sliding slot
Sliding in slot 20, closure 3 is sleeved on 45 outside of top board 41 and seat board of sliding slot 4, and closure 3 is fixed on detection
On device sheath body 1, sealing Z-type lid 15 is installed with outside closure 3；In this way, sliding slot 4 is relative to sealing Z-type lid 15 and envelope
It closes shell 3 to be moveable, only because there is the constraint of sealing Z-type lid 15 and closure 3, the movement of sliding slot 4 is that have centainly
Mobile limitation.
Sliding slot 4 is made of top board 41, backboard 46, seat board 45, pressing plate 41, backboard 46, seat board 45 setting structure be
Detecting head 2, detecting head slide 17 and spring supporting external member in order to facilitate the installation of, the corresponding probe channel on the backboard 46 of sliding slot 4
21 position is provided with probe perforation 44, and sliding slot 4 is below seat board 45, limiting slot 47 is internally provided in seat board 45, in seat board 45
It is placed with spring front stall 7 in limiting slot 47, is integrated detecting head slide 17 fixed thereto on spring front stall 7, in spring front stall 7
The position of upper corresponding probe perforation 44 is provided with probe undergauge, and the internal diameter for undergauge of popping one's head in is less than probe 44 internal diameters of perforation, and detecting head 2 is
It is made of major diameter leading portion 27, path back segment 28 and undergauge chuck 29, major diameter front end 27 passes through probe channel 21 and probe perforation 44
It stretches into oil pipe to be inserted into chamber 18, path back segment 28 passes through probe undergauge to stretch into inside sliding slot 4, and undergauge chuck 29 is stuck in spring front stall
On 7,5 front end sleeve of resetting spring is withstood on path back segment 21 on spring front stall 7, is pacified on 3 rear side backboard of closure
Equipped with spring back seat 16,5 tail end of resetting spring is withstood in spring back seat 16.In this way, after oil pipe is inserted into chamber 18 and is inserted into oil pipe,
Oil pipe can squeeze detecting head 2 to inside contracting, will be in retraction since the undergauge chuck 29 of detecting head 2 is stuck in 7 outside of spring front stall
7 slid inward of spring front stall and compressed spring 5 are squeezed simultaneously, since spring front stall 7 and detecting head slide 17 are fixed as one, so
Detecting head slide 17 also can slid inward.
It is provided with guide-track groove 24 in 17 side of detecting head slide, guide-track groove 24 is sleeved on sliding rail 23, and 23 one end of sliding rail is fixed on
At guide rail fixing groove 43 on sliding slot 4, the other end is fixed in spring back seat 16；The detection of 23 side of sliding rail is corresponded in sliding slot 4
It is installed with baffle 22 on device sheath body 1, has sliding rail block 25 at corresponding rails slot 24 on baffle 22；The setting of guide-track groove 24 exists
Side on detecting head slide 17, but it is open state to have one end, and sliding rail 23 cannot be accurate by straight limit displacement, in this way, just
Increase by one on the detection device sheath body 1 of opening side and be similar to capping, is entire guide-track groove 24 into a closed state, and
What sliding rail block 25 can decide whether to be necessarily present according to encapsulation situations, main purpose is exactly to increase guide-track groove 24 nothing more than
With the compactedness between sliding rail 23.
By the setting of sliding rail 23 and guide-track groove 24, the straight line that such detecting head slide 17 can only be set along sliding rail 23 is slided
It is dynamic, deviation is not will produce, ensure that detecting head 2 stretches according to setting straight line.
Linear displacement transducer is fixed on detecting head slide 17, in this way, just by existing displacement sensor receiving device
Displacement data can be read, to be detected.
Adjust component：It is installed in 45 rear end of pedestal and extends item 42, extended item 42 and pass through closure 3 and sealing Z
Type lid 15 is stretched into adjustment assembly chambeies and is fixed with sliding slot mounting blocks 14；In sealing 15 outer sheath of Z-type lid equipped with adjustment shell 10, adjust
10 inside of whole shell is adjustment assembly chambeies, and the cylinder body of hydraulic cylinder 11 is fixed on 10 outside of adjustment shell, the hydraulic stem of hydraulic cylinder 11
It is stretched into adjustment assembly chambeies across adjustment shell 10, sliding slot adjustment block 12,12 He of sliding slot adjustment block is installed in hydraulic rod end
Corresponding pin hole 13 is provided on sliding slot mounting blocks 14；It is provided with installing port 9 on adjustment shell 10, peace is stamped on installing port 9
Fill lid 8.
This structure is only used in well workover, in order to prevent damage detection head, this knot is used when needing to bounce back detecting head
Structure, in use, existing open installation lid 8, stretching into tool from installing port 9 will be in sliding slot mounting blocks 14 and sliding slot adjustment block 12
Pin hole 13 is connected by pin, is then dropped by hydraulic cylinder 11 and is extended item 42, and company is fixed with sliding slot 4 due to extending item 42
It connects, is skidded off from sliding slot insertion groove 20 in this way, sliding slot 4 will be dropped, while driving detecting head 2 to be inserted into chamber 18 from oil pipe and returning together
Contracting thus will not have an impact detecting head maintenance.
The present invention is provided with sliding slot cavity pressure detection mouth 6 on closure 3.This detection mouth can facilitate to internal pressure into
Row is grasped at any time.
The present invention detailed process be：
In Completion Operations, need oil pipe being transported to underground, when petroleum pipeline toward when being moved from top to bottom by earth's surface, opening covers,
By taking out the pin of pin hole location at installing port, the entirety and sliding block mounting groove for so that hydraulic cylinder and hydraulic cylinder mounting blocks is connected
Separation, and the hydraulic stem of hydraulic cylinder is fully retracted into cylinder, realizes the separation of two systems.
When the bottom end box cupling of oil pipe touches detecting head, extruding of the resetting spring in limit and the tubing coupling of spring back seat
Under effect, related spring front stall, detecting head slide and linear displacement transducer move outward together, wherein straight-line displacement passes
Four screws of sensor are fixed together with detecting head slide.It is mobile that above-mentioned component system is caused to form opposite sliding with guide rail,
Guide rail is connected by screw fixation with limit plate, and limit plate carries out rigid body with detection device shell by screw and connect,
The monitoring that location variation is realized with this, in order to the position of accurate measurements flowline box cupling, using eight sets of redundancy detection devices,
It is accurate to report oil pipe down position to be implemented as detecting collar location.
After box cupling height passes through, under the action of resetting spring, detecting head, spring front stall, detecting head slide and straight line
Displacement sensor is returned to originally tubing diameter together, and close contact is continuously formed with oil pipe
During well workover, in order to avoid box cupling detection equipment clamps oil pipe the interference for causing oil pipe from underground proposition ground, then
Secondary opening capping, by being inserted into the pin of pin hole location, the entirety for making hydraulic cylinder be connected with hydraulic cylinder mounting blocks at installing port
A rigid body is connected into sliding block mounting groove, under the action of hydraulic-driven power, by the circular through hole for sealing Z-type cover board
Place, drags sliding block mounting groove, sliding slot, spring front stall, detecting head, detecting head slide, until detecting head is entirely retracted to detection dress
The inside for setting position trepanning of popping one's head on shell, realizes being moved up without clamped condition for oil pipe.
Claims (2)
1. a kind of universal servo-actuated collar detecting device, it is characterised in that：Probe assembly（26）Mounted on detection device sheath body（1）
On；Detection device sheath body（1）Inside is that oil pipe is inserted into chamber（18）, it is abutted flange up and down（19）, in detection device sheath body（1）Outside
Side is provided with sliding slot insertion groove（20）, sliding slot insertion groove（20）It is inserted into chamber with oil pipe（18）Between be provided with probe channel（21）；
Probe assembly（26）：Mainly there are detecting head accessory part and adjustment component to constitute；
Detecting head accessory part：Including sliding slot（4）, detecting head（2）, sealing Z-type lid（15）, resetting spring（5）, closure
（3）；Sliding slot（4）It is inserted into sliding slot insertion groove（20）It is interior, closure（3）It is sleeved on sliding slot（4）Top board（41）And seat board
（45）Outside, and closure（3）It is fixed on detection device sheath body（1）On, closure（3）It is outer to be installed with sealing Z
Type lid（15）；
Sliding slot（4）It is by top board（41）, backboard（46）, seat board（45）It constitutes, in sliding slot（4）Backboard（46）Upper corresponding probe
Channel（21）Position be provided with probe perforation（44）, sliding slot（4）It is seat board below（45）, in seat board（45）It is internally provided with limiting slot
（47）, in seat board（45）Limiting slot（47）Inside it is placed with spring front stall（7）, spring front stall（7）On be fixed thereto integrated
Detecting head slide（17）, in spring front stall（7）Upper corresponding probe perforation（44）Position be provided with probe undergauge, undergauge of popping one's head in it is interior
Diameter is less than probe and perforates（44）Internal diameter, detecting head（2）It is by major diameter leading portion（27）, path back segment（28）With undergauge chuck（29）Structure
At major diameter front end（27）Across probe channel（21）It perforates with probe（44）It stretches into oil pipe and is inserted into chamber（18）It is interior, path back segment
（28）Sliding slot is stretched into across probe undergauge（4）Inside, undergauge chuck（29）It is stuck in spring front stall（7）On, resetting spring（5）Front end
It is sleeved on path back segment（21）On, and withstand on spring front stall（7）On, in closure（3）After spring is installed on rear side backboard
Seat（16）, resetting spring（5）Tail end withstands on spring back seat（16）On；In detecting head slide（17）Side is provided with guide-track groove（24）,
Guide-track groove（24）It is sleeved on sliding rail（23）On, sliding rail（23）One end is fixed on sliding slot（4）On guide rail fixing groove（43）Place, the other end
It is fixed on spring back seat（16）On；In sliding slot（4）Corresponding sliding rail（23）The detection device sheath body of side（1）On be installed with gear
Plate（22）, baffle（22）Upper corresponding rails slot（24）There is sliding rail block at place（25）；In pedestal（45）Rear end is installed with extension
Item（42）, extend item（42）Across closure（3）With sealing Z-type lid（15）Stretch into adjustment assembly chambeies in sliding slot mounting blocks
（14）It is fixed；In sealing Z-type lid（15）Outer sheath is equipped with adjustment shell（10）, adjust shell（10）Inside is adjustment assembly chambeies,
Hydraulic cylinder（11）Cylinder body be fixed on adjustment shell（10）Outside, hydraulic cylinder（11）Hydraulic stem pass through adjustment shell（10）It stretches into
It adjusts in assembly chambeies, sliding slot adjustment block is installed in hydraulic rod end（12）, sliding slot adjustment block（12）With sliding slot mounting blocks（14）
On be provided with corresponding pin hole（13）；In adjustment shell（10）On be provided with installing port（9）, in installing port（9）On be stamped installing port
Lid（8）.
2. universal servo-actuated collar detecting device according to claim 1, it is characterised in that：In closure（3）On be provided with
Sliding slot cavity pressure detection mouth（6）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810721626.XA CN108590635B (en) | 2018-07-04 | 2018-07-04 | Universal follow-up coupling detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810721626.XA CN108590635B (en) | 2018-07-04 | 2018-07-04 | Universal follow-up coupling detection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108590635A true CN108590635A (en) | 2018-09-28 |
| CN108590635B CN108590635B (en) | 2023-05-23 |
Family
ID=63633745
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810721626.XA Active CN108590635B (en) | 2018-07-04 | 2018-07-04 | Universal follow-up coupling detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108590635B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116295771A (en) * | 2023-04-10 | 2023-06-23 | 山东华星重工机械装备有限公司 | Vibration testing device of miniature excavator bucket |
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| DE10334503A1 (en) * | 2003-07-29 | 2005-02-24 | Haff & Schneider Gmbh & Co Ohg | Measurement probe for machine tool work piece measurements has needle and flexible supporting rod in hollow spindle with sprung radial setting screws |
| DE102006034928A1 (en) * | 2006-07-28 | 2008-01-31 | Ptr Messtechnik Gmbh & Co. Kg | Switch spring contact pin for use in testing apparatus, has housing, contact lug, retainer and probe head that are provided with inner recess, where recess is guided till head is in use position, and optical fiber is penetrated into recess |
| CN105317426A (en) * | 2015-10-16 | 2016-02-10 | 山东胜利石油装备产业技术研究院 | Oil pipe and sucker rod coupling detection equipment and detecting method |
| CN206972227U (en) * | 2017-05-25 | 2018-02-06 | 任丘市博鑫石油机械制造有限公司 | Environmentally friendly closed tubing collar detection device |
| CN108049864A (en) * | 2017-12-21 | 2018-05-18 | 大连理工大学 | A kind of string collar detection device and its application method |
| CN108194075A (en) * | 2017-12-14 | 2018-06-22 | 西安宇星石油机械新技术开发有限公司 | A kind of Operating Pressure box cupling sensing device |
-
2018
- 2018-07-04 CN CN201810721626.XA patent/CN108590635B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10334503A1 (en) * | 2003-07-29 | 2005-02-24 | Haff & Schneider Gmbh & Co Ohg | Measurement probe for machine tool work piece measurements has needle and flexible supporting rod in hollow spindle with sprung radial setting screws |
| DE102006034928A1 (en) * | 2006-07-28 | 2008-01-31 | Ptr Messtechnik Gmbh & Co. Kg | Switch spring contact pin for use in testing apparatus, has housing, contact lug, retainer and probe head that are provided with inner recess, where recess is guided till head is in use position, and optical fiber is penetrated into recess |
| CN105317426A (en) * | 2015-10-16 | 2016-02-10 | 山东胜利石油装备产业技术研究院 | Oil pipe and sucker rod coupling detection equipment and detecting method |
| CN206972227U (en) * | 2017-05-25 | 2018-02-06 | 任丘市博鑫石油机械制造有限公司 | Environmentally friendly closed tubing collar detection device |
| CN108194075A (en) * | 2017-12-14 | 2018-06-22 | 西安宇星石油机械新技术开发有限公司 | A kind of Operating Pressure box cupling sensing device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116295771A (en) * | 2023-04-10 | 2023-06-23 | 山东华星重工机械装备有限公司 | Vibration testing device of miniature excavator bucket |
| CN116295771B (en) * | 2023-04-10 | 2024-03-01 | 山东华星重工机械装备有限公司 | Vibration testing device of miniature excavator bucket |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108590635B (en) | 2023-05-23 |
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