CN105545832B - A kind of movable gas hood lifting hydraulic control system and method - Google Patents
A kind of movable gas hood lifting hydraulic control system and method Download PDFInfo
- Publication number
- CN105545832B CN105545832B CN201610130035.6A CN201610130035A CN105545832B CN 105545832 B CN105545832 B CN 105545832B CN 201610130035 A CN201610130035 A CN 201610130035A CN 105545832 B CN105545832 B CN 105545832B
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- China
- Prior art keywords
- valve
- hydraulic
- solenoid directional
- gas hood
- movable gas
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/02—Installations or systems with accumulators
- F15B1/027—Installations or systems with accumulators having accumulator charging devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
Abstract
The invention discloses a kind of movable gas hood lifting hydraulic control system and method, which includes fuel tank, hydraulic pressure pump group, hydraulic cylinder, solenoid directional control valve I and II, check valve I, II, III and IV, hydraulic control one-way valve, band spring non-return valve；The hydraulic pressure pump group wherein being connect with fuel tank is connect respectively by check valve I with the P of solenoid directional control valve I and solenoid directional control valve II mouths；The T mouths of solenoid directional control valve I are connect by check valve II with fuel tank, and A mouthfuls are connected by the rodless cavity of hydraulic control one-way valve and hydraulic cylinder；The T mouths of solenoid directional control valve II are connect by check valve III with fuel tank, and A mouthfuls connect with the X mouths of hydraulic control one-way valve；The rod chamber of hydraulic cylinder is connect by the band spring non-return valve and check valve IV being set up in parallel with fuel tank.Hydraulic control system of the present invention provides power for the vertical motion of movable gas hood by accumulator, and lowering action need to only be realized by the dead weight of movable gas hood, have it is simple for structure, it is easy to operate, the advantages of reliable and energy-saving.
Description
Technical field
The invention belongs to metallurgical technical field of hydraulic pressure, and in particular to a kind of movable gas hood lifting hydraulic control system and side
Method, for the control of elevating gear for movable fume hood.
Background technology
Elevating gear for movable fume hood is the key that ancillary equipment in the converters steelmaking process such as converter, AOD furnace, and effect is
The movable gas hood above connection fire door is made to blow with during charging, corresponding elevating movement can be made.The purpose is to collect from
The furnace gas and its combustion product that fire door sprays, control the size for the gap area that leaks out, and gas recovery reduces flue gas and leaks.
Elevating gear for movable fume hood mainly uses motor elevator and hydraulic lifting two ways at present.Former structure complexity,
Weight of equipment is big, and repairs relatively difficult；And the latter uses hydraulic cylinder, and movable gas hood is lifted by crane by chain, structure is relatively simple,
Light-weight, reliability is preferable, easy-maintaining, has been widely applied.Meanwhile hydraulic lifting has single hydraulic cylinder and four hydraulic cylinders
Synchronous two kinds of structures.
Invention content
In view of this, the purpose of the present invention is to provide a kind of hydraulic controls by single hydraulic cylinder control movable gas hood lifting
System and its control method, it is easy to operate with simple for structure to improve the stability of movable gas hood lifting process,
The advantages of reliable and energy-saving.
In order to achieve the above objectives, the present invention is achieved through the following technical solutions：
The present invention provides a kind of movable gas hood lifting hydraulic control system, including fuel tank, hydraulic pressure pump group, check valve I, electromagnetism
Reversal valve I, solenoid directional control valve II, check valve II, check valve III, hydraulic control one-way valve, hydraulic cylinder, band spring non-return valve, check valve
IV, it is connected by asphalt channel in valve block and hydraulic oil pipeline between them, wherein the hydraulic pressure pump group being connect with fuel tank passes through list
It is connect respectively with the P of solenoid directional control valve I and solenoid directional control valve II mouths to valve I；The T mouths of solenoid directional control valve I by check valve II with
Fuel tank connects, and A mouthfuls are connected by the rodless cavity of hydraulic control one-way valve and hydraulic cylinder；The T mouths of solenoid directional control valve II pass through check valve
III connect with fuel tank, and A mouthfuls connect with the X mouths of hydraulic control one-way valve；The rod chamber of hydraulic cylinder passes through the band spring list that is set up in parallel
It is connect to valve and check valve IV with fuel tank.
Further, the speed governing valve between solenoid directional control valve I and hydraulic control one-way valve is further included.
Further, the accumulator being connect by check valve I with hydraulic pressure pump group and pressure switch are further included.
Further, the normally close valve being connect for the rodless cavity of hydraulic cylinder with its rod chamber and fuel tank is further included.
The present invention also provides a kind of hydraulic control method applied to above-mentioned movable gas hood lifting hydraulic control system, specifically
Including：It is corresponding that solenoid directional control valve I is controlled to obtain electric, II dead electricity of solenoid directional control valve when movable gas hood will rise；Work as movable gas hood
Corresponding to control I dead electricity of solenoid directional control valve when declining, solenoid directional control valve II obtains electric；When movable gas hood will stop at it effectively
It is corresponding to control II equal dead electricity of solenoid directional control valve I and solenoid directional control valve during any position in stroke.
Further, the flow for adjusting speed governing valve is further included, the raising and lowering speed for making movable gas hood is adjustable.
Both further, detect system pressure value and the pressure switch preset value in the hydraulic control system and compare
Numerical value；The switch preset value includes predetermined low level and default high level；When system pressure value is down to pressure switch predetermined low level,
Hydraulic pressure pump group starts, and pressure oil is supplemented for accumulator；When system pressure value, which rises to pressure switch, presets high level, hydraulic pressure pump group is stopped
Machine.
Further, when hydraulic control system breaks down or needs maintenance, correspondingly normally close valve is controlled to open.
The advantage of the invention is that：
1st, the vertical motion of movable gas hood provides power by accumulator in hydraulic control system of the invention, and lowering action
It is then realized by its dead weight, there is the advantages of simple for structure, easy to operate.
2nd, hydraulic pressure pump group after for the first time for accumulator filling liquid, is at shape out of service in hydraulic control system of the invention
State, only when system pressure is less than lower limiting value, hydraulic pressure pump group can just be again started up and supplement pressure oil for accumulator, when system pressure
It is out of service again when power reaches upper limit value.Therefore the hydraulic pressure pump group only plays fluid infusion, load capacity can greatly reduce, both
Hydraulic control system investment can be reduced, and can effectively reduce energy consumption used in everyday, is had the advantages that reliable and energy saving.
3rd, special cooling-cycle device need not be set in hydraulic control system of the invention, has not only saved investment, but also subtract
The consumption to respective resources is lacked.
4th, the rodless cavity of hydraulic cylinder is connect by normally close valve with rod chamber and fuel tank in hydraulic control system of the invention.When
When hydraulic control system breaks down or needs maintenance, normally close valve only need to be opened, hydraulic cylinder rod chamber and rodless cavity are connected, from
And hydraulic cylinder is made to be in quick condition, meet manual mode lifting movable gas hood, improve safety and operability.
Other advantages, target and the feature of the present invention will be illustrated in the following description to a certain extent, and
And to a certain extent, based on will be apparent to those skilled in the art to investigating hereafter, Huo Zheke
To be instructed from the practice of the present invention.The target and other advantages of the present invention can by following specification realizing and
It obtains.
Description of the drawings
To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention is made below in conjunction with attached drawing into
The detailed description of one step, wherein：
Fig. 1 is the hydraulic control system schematic diagram of the present invention；
Reference numeral：1- fuel tanks；2- hydraulic pressure pump groups；3- check valves I；4- solenoid directional control valves I；5- solenoid directional control valves II；6-
Check valve II；7- check valves III；8- hydraulic control one-way valves；9- hydraulic cylinders；10- speed governing valves；11- band spring non-return valves；12- check valves
Ⅳ；13- accumulators；14- pressure switches；15- normally close valves；16- chains；17- drive sprockets；18- movable gas hoods.
Specific embodiment
The preferred embodiment of the present invention will be described in detail below；Preferred embodiment be should be appreciated that only for saying
The bright present invention, the protection domain being not intended to be limiting of the invention.
As shown in Figure 1, a kind of movable gas hood lifting hydraulic control system, which is by chain 16 and driving
Sprocket wheel 17 is connect with the piston rod (unmarked) of hydraulic cylinder 9, when the piston rod of hydraulic cylinder 9 stretches out, in the execution of movable gas hood 18
Action is risen, and when the piston rod of hydraulic cylinder 9 is retracted, movable gas hood then performs lowering action.Wherein control the piston of hydraulic cylinder 9
The hydraulic control system of bar expanding-contracting action (or lifting gear lifting action of movable gas hood 18) includes, and is connect with fuel tank 1
Hydraulic pressure pump group 2 is connect respectively by check valve I 3 with the P of solenoid directional control valve I 4 and solenoid directional control valve II 5 mouths；Solenoid directional control valve I 4
T mouths connect by check valve II 6 with fuel tank 1, A mouthfuls are connect by hydraulic control one-way valve 8 with the rodless cavity of hydraulic cylinder 9；Electromagnetism
The T mouths of reversal valve II 5 are connect by check valve III 7 with fuel tank 1, and A mouthfuls connect with the X mouths of hydraulic control one-way valve 8；Hydraulic cylinder 9
Rod chamber is connect by the band spring non-return valve 11 and check valve IV 12 being set up in parallel with fuel tank 1, in this way, with spring non-return valve 11
It can play the role of after the stretching of the piston rod of hydraulic cylinder 9 to 9 voltage stabilizing of hydraulic cylinder, and check valve IV 12 can be in the work of hydraulic cylinder 9
Convenient for the rod chamber of hydraulic cylinder 9 from 1 repairing of fuel tank in stopper rod retraction, the rod chamber to avoid hydraulic cylinder 9 is emptied.Certainly in difference
Embodiment in, the band spring non-return valve 11 being set up in parallel and unidirectional can also be replaced with a bidirectional throttling valve (not shown)
Valve IV 12 can equally reach above-mentioned purpose.The solenoid directional control valve I 4 and solenoid directional control valve II 5 commutate for two-way three-position electromagnetic
Valve has the characteristics of of low cost, easy to control.
In the present embodiment, the speed governing valve 10 between solenoid directional control valve I 4 and hydraulic control one-way valve 8 is further included, works as movable gas hood
Speed in process of rising or falling can be adjusted by the speed governing valve 10, ensure that movable gas hood is stable, quick.For
Further remote operation speed governing valve 10, further includes the PLC (being not drawn into figure) being connect with speed governing valve 10, and the PLC is used to adjust
The size of 10 input signal of speed governing valve；When movable gas hood 18 is when performing different actions, such as up and down, at the uniform velocity, quickly, slowly
Speed etc., the PLC can be according to the flows of the procedure auto-control speed governing valve 10 of input, so as to reach reliable and secure by speed governing valve 10
Control movable gas hood 18 act purpose.
In the present embodiment, the accumulator 13 being connect by check valve I 3 with hydraulic pressure pump group 2 and pressure switch 14 are further included；It should
The start and stop of hydraulic pressure pump group 2 are controlled by pressure switch 14, after for the first time for 13 filling liquid of accumulator, are at shape out of service
State, only when system pressure value is less than 14 preset lower limiting value of pressure switch, hydraulic pressure pump group 2 can just be again started up and be accumulator
13 supplement pressure oils, it is out of service again when system pressure value reaches 14 preset upper limit value of pressure switch.Therefore the hydraulic pump
Group only plays fluid infusion, and load capacity can greatly reduce, and can not only reduce hydraulic control system investment, but also can effectively reduce daily
The energy consumption used has the advantages that reliable and energy saving.
In the present embodiment, the normally close valve 15 being connect for the rodless cavity of hydraulic cylinder 9 with its rod chamber and fuel tank 1 is further included；
When system breaks down or needs maintenance, normally close valve 15 can be opened, rodless cavity and rod chamber and the fuel tank 1 of hydraulic cylinder 9 connect
It is logical, so as to which two cavity pressure oil be released, hydraulic cylinder 9 is allow to float, manually to realize the liter of movable gas hood 18
Drop.
In the present embodiment, can also explosion-proof valve (not shown) be set in the rodless cavity hydraulic fluid port for being close to hydraulic cylinder 9；In this way, pass through
The explosion-proof valve further coordinates hydraulic control one-way valve 8, a large amount of leakages or two-way three-position electromagnetic can occur in the hydraulic control system
During reversal valve I4 dead electricity, hydraulic cylinder 9 is avoided to retract suddenly, production is caused to stop so as to which movable gas hood 18 be made to fall.
The present invention is applied to the hydraulic control method of above-mentioned movable gas hood lifting hydraulic control system, specifically includes：
When running for the first time, pressure switch 14 controls hydraulic pressure pump group 2 to start, and is 13 stuffing pressure of accumulator oil, when system pressure
Force value reaches pressure switch 14 when presetting high level, and hydraulic pressure pump group 2 is shut down.
In production process, when system pressure value drops to 14 predetermined low level of pressure switch, hydraulic pressure pump group 2 starts, to store
It can the supplement pressure oil of device 13；When system pressure value, which reaches pressure switch 14, presets high level, hydraulic pressure pump group 2 is shut down.
When movable gas hood will rise, the corresponding b ends electromagnet for controlling solenoid directional control valve I 4 obtains electric, solenoid directional control valve II
5 dead electricity；At this point, the pressure oil that accumulator 13 provides enters hydraulic cylinder through solenoid directional control valve I 4, speed governing valve 10 and hydraulic control one-way valve 8
9 rodless cavity, piston rod stretch out, and rod chamber pressure oil flows back to fuel tank 1 by band spring non-return valve 11, and piston rod passes through chain
Item 16 and drive sprocket 17 drive movable gas hood 18 to rise.The rate of climb of movable gas hood 18 can be adjusted by speed governing valve 10
Section.
It is corresponding to control I 4 dead electricity of solenoid directional control valve, the b ends electromagnetism of solenoid directional control valve II 5 when movable gas hood will decline
Iron obtains electric；At this point, the pressure oil that accumulator 13 provides enters the X mouths of hydraulic control one-way valve 8,8 reverse opening of hydraulic control one-way valve is forced,
The rodless cavity pressure oil of hydraulic cylinder 9 flows back to fuel tank by hydraulic control one-way valve 8, speed governing valve 10, solenoid directional control valve I 4 and check valve II 6
1, and movable gas hood 18 declines under the action of dead weight, speed is adjusted by speed governing valve 10.During decline, hydraulic cylinder 9 has
Rod cavity can be by the check valve IV 12 of no spring from 1 repairing of fuel tank, to avoid being emptied.Check valve III 7 can ensure to work as electromagnetic switch
After II 5 dead electricity of valve, the pressure oil flowed through in II 5 oil circuit of solenoid directional control valve can flow back to fuel tank 1.
It is corresponding to control solenoid directional control valve I 4 and electricity when movable gas hood will stop at any position in its effective travel
II 5 equal dead electricity of magnetic reversal valve；The rodless cavity oil circuit of the locking cut-out hydraulic cylinder 9 of hydraulic control one-way valve 8, so as to ensure that movable gas hood can be
Staying at random location is without sliding.
When system break down or need maintenance when, normally close valve 15 can be opened, the rodless cavity and rod chamber of hydraulic cylinder 9 with
Fuel tank 1 connects, and so as to which two cavity pressure oil be released, hydraulic cylinder 9 is allow to float, manually to realize movable gas hood
Lifting.
Finally illustrate, the above embodiments are merely illustrative of the technical solutions of the present invention and it is unrestricted, although with reference to compared with
The present invention is described in detail in good embodiment, it will be understood by those of ordinary skill in the art that, it can be to the skill of the present invention
Art scheme is modified or replaced equivalently, and without departing from the objective and range of the technical program, should all be covered in the present invention
Right in.
Claims (6)
1. a kind of movable gas hood lifting hydraulic control system, it is characterised in that：Including fuel tank (1), hydraulic pressure pump group (2), check valve I
(3), solenoid directional control valve I (4), solenoid directional control valve II (5), check valve II (6), check valve III (7), hydraulic control one-way valve (8), hydraulic pressure
Cylinder (9), band spring non-return valve (11), check valve IV (12), passes through asphalt channel in valve block between them and hydraulic oil pipeline connects
It connects, wherein the hydraulic pressure pump group (2) being connect with fuel tank (1) passes through check valve I (3) and solenoid directional control valve I (4) and solenoid directional control valve II
(5) P mouths connect respectively；The T mouths of solenoid directional control valve I (4) are connect by check valve II (6) with fuel tank (1), and A mouthfuls pass through liquid
Control check valve (8) is connect with the rodless cavity of hydraulic cylinder (9)；The T mouths of solenoid directional control valve II (5) pass through check valve III (7) and fuel tank
(1) it connects, A mouthfuls connect with the X mouths of hydraulic control one-way valve (8)；The rod chamber of hydraulic cylinder (9) passes through the band spring list that is set up in parallel
It is connect to valve (11) and check valve IV (12) with fuel tank (1)；It further includes set between solenoid directional control valve I (4) and hydraulic control one-way valve (8)
Speed governing valve (10).
2. movable gas hood lifting hydraulic control system according to claim 1, it is characterised in that：It further includes and passes through check valve
The accumulator (13) and pressure switch (14) that I (3) are connect with hydraulic pressure pump group (2).
3. movable gas hood lifting hydraulic control system according to claim 1, it is characterised in that：It further includes for hydraulic cylinder
(9) normally close valve (15) that rodless cavity is connect with its rod chamber and fuel tank (1).
4. a kind of movable gas hood raise-lower hydraulic control method, applied to hydraulic control system described in claim 1, feature exists
In this method includes：
It is corresponding that solenoid directional control valve I (4) is controlled to obtain electric, solenoid directional control valve II (5) dead electricity when movable gas hood will rise, and lead to
The flow of speed governing valve (10) is overregulated, the rate of climb for making movable gas hood is adjustable；
When movable gas hood will decline, corresponding to control solenoid directional control valve I (4) dead electricity, solenoid directional control valve II (5) must be electric, and leads to
The flow of speed governing valve (10) is overregulated, the decrease speed for making movable gas hood is adjustable；
It is corresponding to control solenoid directional control valve I (4) and electromagnetism when movable gas hood will stop at any position in its effective travel
The equal dead electricity of reversal valve II (5).
5. movable gas hood raise-lower hydraulic control method according to claim 4, it is characterised in that：Detect the hydraulic control
System pressure value and pressure switch (14) preset value in system and the numerical value both compared；
When system pressure value is down to pressure switch predetermined low level, hydraulic pressure pump group (2) starts, and pressure is supplemented for accumulator (13)
Oil；
When system pressure value, which rises to pressure switch, presets high level, hydraulic pressure pump group (2) is shut down.
6. movable gas hood raise-lower hydraulic control method according to claim 4, it is characterised in that：When hydraulic control system goes out
When showing failure or needing maintenance, correspondingly normally close valve (15) is controlled to open.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610130035.6A CN105545832B (en) | 2016-03-08 | 2016-03-08 | A kind of movable gas hood lifting hydraulic control system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610130035.6A CN105545832B (en) | 2016-03-08 | 2016-03-08 | A kind of movable gas hood lifting hydraulic control system and method |
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| Publication Number | Publication Date |
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| CN105545832A CN105545832A (en) | 2016-05-04 |
| CN105545832B true CN105545832B (en) | 2018-06-29 |
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| CN201610130035.6A Active CN105545832B (en) | 2016-03-08 | 2016-03-08 | A kind of movable gas hood lifting hydraulic control system and method |
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| CN110762069B (en) * | 2018-07-27 | 2021-05-14 | 比亚迪股份有限公司 | Hydraulic control system |
| CN109537953A (en) * | 2018-12-29 | 2019-03-29 | 天津理工大学 | A kind of stereo garage |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202041362U (en) * | 2011-03-21 | 2011-11-16 | 武汉希萌工程咨询有限公司 | Static loading test system hydraulic device for micro-controlled railroad bridge |
| CN103708391A (en) * | 2013-12-17 | 2014-04-09 | 天津大学 | Feed system of large-displacement lifting device for large-scale structures |
| CN204729399U (en) * | 2015-04-09 | 2015-10-28 | 山东科瑞石油装备有限公司 | A kind of coiled tubing pipe guide device hydraulic driving system |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201225344Y (en) * | 2008-05-20 | 2009-04-22 | 上海建工（集团）总公司 | Building construction mould climbing jacking synchronous control system |
| US10066368B2 (en) * | 2013-01-17 | 2018-09-04 | Hitachi Construction Machinery Co., Ltd. | Hydraulic fluid energy recovery apparatus for work machine |
| CN204704176U (en) * | 2015-04-23 | 2015-10-14 | 凯迈（洛阳）测控有限公司 | A kind of piston elevator mechanism and hydraulic control device thereof |
| CN204704167U (en) * | 2015-06-03 | 2015-10-14 | 浙江伟光泵阀制造有限公司 | Double loop energy storage type hydraulic control slow closing valve hydraulic station |
| CN204778090U (en) * | 2015-06-17 | 2015-11-18 | 沈阳宝思乐机械设备有限公司 | Domestic bbservation elevator hydraulic system |
| CN205401265U (en) * | 2016-03-08 | 2016-07-27 | 中冶赛迪工程技术股份有限公司 | Activity petticoat pipe lift hydraulic control system |
-
2016
- 2016-03-08 CN CN201610130035.6A patent/CN105545832B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202041362U (en) * | 2011-03-21 | 2011-11-16 | 武汉希萌工程咨询有限公司 | Static loading test system hydraulic device for micro-controlled railroad bridge |
| CN103708391A (en) * | 2013-12-17 | 2014-04-09 | 天津大学 | Feed system of large-displacement lifting device for large-scale structures |
| CN204729399U (en) * | 2015-04-09 | 2015-10-28 | 山东科瑞石油装备有限公司 | A kind of coiled tubing pipe guide device hydraulic driving system |
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