CN101705826B - Front shield stable shoe hydraulic system of shield machine - Google Patents
Front shield stable shoe hydraulic system of shield machine Download PDFInfo
- Publication number
- CN101705826B CN101705826B CN2009101882516A CN200910188251A CN101705826B CN 101705826 B CN101705826 B CN 101705826B CN 2009101882516 A CN2009101882516 A CN 2009101882516A CN 200910188251 A CN200910188251 A CN 200910188251A CN 101705826 B CN101705826 B CN 101705826B
- Authority
- CN
- China
- Prior art keywords
- shield
- pressure
- oil cylinder
- hydraulic system
- valve group
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Fluid-Pressure Circuits (AREA)
Abstract
The invention relates to a front shield stable shoe hydraulic system of a shield machine, which belongs to a hydraulic ensuring system for realizing the stable working of a TBM/shield machine in engineering machinery. The front shield stable shoe hydraulic system of a shield machine comprises a pump group, a pressure regulating valve group, a control valve group, a front shield stable shoe oil cylinder, an oil box device and a connecting oil pipe, wherein the front shield stable shoe oil cylinder is installed on a front shield of the shield machine, the control valve group is installed on a middle shield, and the oil box device and the pump group are installed on a rear trolley; and the control valve group, the pump group, the pressure regulating valve group, the oil box device and the front shield stable shoe oil cylinder are connected to form an integral hydraulic structure by the connecting oil pipe. The working pressure of the oil cylinder is adjusted by a proportional overflow valve in the pressure regulating valve group; meanwhile, a remote control opening X connected with a rod-free cavity sequence valve in the front shield stable shoe oil cylinder is connected with a pressure oil opening of the proportional overflow valve to realize the synchronous change of the pressure of the hydraulic system and the pressure of the rod-free cavity of the front shield stable shoe oil cylinder. The invention has the characteristics of cutter disk vibrating and shield body rotating prevention, low production cost, and the like and can be widely applied to the field of TBM/shield machines.
Description
Technical field
The hydraulic pressure that stable shoe hydraulic system of the present invention belongs to the realization TBM/ shield machine stable operation in the engineering machinery guarantees system, specially refers to front shield stable shoe hydraulic system of shield machine.
Background technique
In the engineering construction that rock is excavated, generally the TBM/ shield machine of Cai Yonging carries out engineer operation, but the TBM/ shield machine is easy to generate the cutterhead vibration when rock is excavated, the rotation of shield body, thus influenced the progress of engineering and the working life of equipment; And then cause human and material resources and financial resources to waste and loss.Above problem is developed a kind of novel structure and hydraulic control system both was provided with stable boots at anterior shield in order to overcome, and the work of stablizing the boots hydraulic jack by hydraulic control is very necessary to overcome existing problem.
Summary of the invention
In view of above-mentioned existing in prior technology problem, the objective of the invention is in shield machine, to be equipped with the stable boots hydraulic pressure of realizing the shield machine stable operation and guarantee system, both front shield stable shoe hydraulic system of shield machine.Shield machine had both kept certain pressure by stablizing boots to the hole wall when rock is excavated, can slide by the grotto wall again, reached the effect that prevents the cutterhead vibration, and this will change along with the difference of geological condition with regard to requiring oil cylinder working-pressure.Simultaneously when running into obstacle, can keep certain pressure to retract oil cylinder, can keep certain pressure to stretch out because oil cylinder withdrawal shield machine shield body departs from the oil cylinder of an other side, all like this oil cylinders still can support on the wall of hole, stabilization is folded in tool setting, can also prevent that the shield body from rotating.The big I of oil cylinder working-pressure is adjusted from shield machine operating room dashboard by the driver.Characteristics such as it is little that the present invention has the cutterhead of making vibration, and the progress of evacuation works is fast, the long service life of equipment, cost of production are low.
Front shield stable shoe hydraulic system of shield machine of the present invention is characterized in that: stablize the boots oil cylinder with tank mounting and be connected oil pipe and formed by pump group, pressure regulator valve group, control valve group and anterior shield.Anterior shield is stablized on the circumferential inner wall that the boots oil cylinder is installed in the anterior shield that cutterhead is housed, and the control valve group is housed on middle shield, is the tail shield after the middle shield, and pump group, pressure regulator valve group and tank mounting in the front shield stable shoe hydraulic system of shield machine are housed on the chassis in the wings; By the connection oil pipe control valve group, pump group, pressure regulator valve group, tank mounting and anterior shield are stablized the boots oil cylinder and connect as one hydraulic system structure.Anterior shield is stablized the working pressure of boots oil cylinder and is adjusted by the proportional pressure control valve in the pressure regulator valve group, the while anterior shield is stablized the remote control mouth X that connects the rodless cavity sequence valve in the boots oil cylinder and is linked to each other with the pressure hydraulic fluid port of proportional pressure control valve, realizes that the rodless cavity pressure that hydraulic system pressure variation and anterior shield are stablized the boots oil cylinder changes synchronously.
Control valve group of the present invention constitutes the control valve group by solenoid directional control valve, stacking type hydraulic control check valve, overlapping anti-cavitation valve, overlapping Double throttle check valve, overlapping relief valve, band remote control mouth X sequence valve and one-way valve, pressure measuring tie-in, pressure transducer.
Pump group of the present invention is made up of motor, coupling, duplex variable displacement pump, high pressure filter, one-way valve.The fuel sucking pipe of duplex variable displacement pump is connected with tank mounting; One-way valve is connected with the pressure regulator valve group; The inlet of duplex variable displacement pump is equipped with compensator and butterfly valve, and the pump group is installed on the underpart supporting base of rear chassis, and tank mounting is installed on the supporting traverse of chassis upper end portion, rear.
Pressure regulator valve group of the present invention is made up of pressure transducer, pressure measuring tie-in, proportional pressure control valve and connection oil pipe.The input end of pressure regulator valve group is connected with the output terminal of pump group, the P mouth of control valve group, and the output terminal of pressure regulator valve group is connected with tank mounting by oil pipe.
The hydraulic control executive system of front shield stable shoe hydraulic system of shield machine of the present invention is 2 groups, 3 groups, 4 groups, 5 groups or 6 groups.Each is organized on the oil circuit that executive system is connected control system in the front shield stable shoe hydraulic system of shield machine side by side; The control executive system is stablized the boots oil cylinder by control valve group and anterior shield and is formed.
Tank mounting of the present invention is made up of fuel tank, air-strainer.
The quantity that anterior shield of the present invention is stablized the boots oil cylinder is 2,3,4,5 or 6, and on the madial wall of the uniform circle edge that is installed in anterior shield.
The quantity of the control valve group in the front shield stable shoe hydraulic system of shield machine of the present invention is 2 groups, 3 groups, 4 groups, 5 groups or 6 groups; And it is corresponding to stablize the quantity of boots oil cylinder with anterior shield.
The pressure transducer that is equipped with at the system pressure oil export of pressure regulator valve group of the present invention can show in the driver operation chamber with the force value of stablizing the pressure transducer that the rodless cavity place of boots oil cylinder is equipped with anterior shield; The force value of proportional pressure control valve can be adjusted in the driver operation chamber by electric knob.
System pressure oil of the present invention enters anterior shield through the B mouth of high pressure filter, Y type solenoid directional control valve and oil pipe and stablizes in the rodless cavity of boots oil cylinder, oil cylinder piston stretches out, solenoid directional control valve is got back to meta after reaching stroke and preset pressure, because of oil cylinder needs the pressurize hydraulic lock that superposeed; If oil cylinder is pushed back because of obstacle effect, still can keep the pressure the same in the rodless cavity of oil cylinder at this moment with system, and the fluid that has more adds in the rodless cavity of oil cylinder through sequence valve and one-way valve, and this moment, the rod chamber of oil cylinder carried out repairing by overlapping anti-cavitation valve
Unnecessary fluid turns back to fuel tank through the overlapping relief valve in the rod chamber of oil cylinder.Oil cylinder stretches out speed to be adjusted by the overlapping Double throttle check valve, and the realization anterior shield is stablized the working pressure compensation of boots oil cylinder.
Characteristics of the present invention and beneficial effect
1, the stable boots among the present invention stretch out support on the wall of hole from the wicket of anterior shield, and stablizing boots is provided by the oil cylinder of stablizing in the boots the pressure of hole wall.The boots of aspiring for stability had both kept certain pressure to the hole wall, can on the grotto wall, slide again, overcome the bigger resistance of the excessive generation of pressure, the too small problem that does not have the effect that prevents the cutterhead vibration again of pressure, this will change along with the difference of geological condition with regard to requiring oil cylinder working-pressure.Simultaneously when running into obstacle, can keep certain pressure to retract oil cylinder, can keep certain pressure to stretch out because oil cylinder withdrawal shield machine shield body departs from the oil cylinder of an other side, all like this oil cylinders still can support on the wall of hole, stabilization is folded in tool setting, can also prevent that the shield body from rotating.
2, front shield stable shoe hydraulic system of shield machine of the present invention has the function that the big I of stablizing the boots oil cylinder working-pressure is adjusted from shield machine operating room dashboard by the driver.
3, use of the present invention can realize that anterior shield stablizes boots pressure follow system pressure and change.
4, use of the present invention can realize the pressure telecontrol.
5, use of the present invention can realize that oil cylinder fluid keeps the compensate function under the certain pressure.
Description of drawings
Accompanying drawing 1 is an anterior shield stable shoe hydraulic system structural representation.
Accompanying drawing 2 is A-A sectional structure charts of accompanying drawing 1.
Accompanying drawing 3 is B-B sectional structure charts of accompanying drawing 1.
Accompanying drawing 4 is anterior shield stable shoe hydraulic system theory of constitution figure.
Among the figure: 1 fuel tank, 2 air-strainer, 3 motors, 4 coupling, 5 duplex variable displacement pumps, 6 high pressure filters, 7 one-way valves, 8 pressure transducers, 9 pressure measuring tie-ins, 10 proportional pressure control valves, 11Y type solenoid directional control valve, 12 stacking type hydraulic control check valves, 13 overlapping anti-cavitation valves, 14 overlapping Double throttle check valves, 15 overlapping relief valves, 16 band remote control mouth X sequence valves, 17 one-way valves, 18 anterior shields are stablized the boots oil cylinder, 19 oil cylinders are imported and exported, 20 oil cylinders are imported and exported, 21 pressure measuring tie-ins, 22 pressure measuring tie-ins, 23 pressure transducers, 24 cutterheads, 25 control valve groups, 26 pump groups, 27 pressure regulator valve groups, 28 rear chassis, 29 tail shields, 30 butterfly valves, 31 compensators, 32 anterior shields, shield in 33,34 tank mountings, Z1-Z4 hydraulic control executive system.
Embodiment
The specific embodiment of the present invention as shown in drawings, front shield stable shoe hydraulic system of shield machine; Stablize boots oil cylinder 18 and be connected oil pipe and formed by pump group 26, pressure regulator valve group 27, control valve group 25 and anterior shield; Anterior shield is stablized on the circumferential inner wall that boots oil cylinder 18 is installed in the anterior shield 32 that cutterhead 24 is housed, on middle shield 33, control valve group 25 is housed, after the middle shield is tail shield 29, and pump group 26, pressure regulator valve group 27 and tank mounting 34 in the front shield stable shoe hydraulic system of shield machine are housed on the chassis 28 in the wings.By the connection oil pipe control valve group 25, pump group 26, pressure regulator valve group 27, tank mounting 34 and anterior shield are stablized boots oil cylinder 18 and connect as one hydraulic system structure.Pump group 26 is made up of motor 3, coupling 4, duplex variable displacement pump 5, high pressure filter 6, one-way valve 7; The fuel sucking pipe of duplex variable displacement pump 5 is connected with tank mounting 34; One-way valve 7 is connected with pressure regulator valve group 27; The inlet of duplex variable displacement pump 5 is equipped with compensator 31 and butterfly valve 30, and pump group 26 is installed on the underpart supporting base of chassis 28 in the wings, and tank mounting 34 is installed on the supporting traverse of upper end portion of rear chassis 28.Pressure regulator valve group 27 is made up of pressure transducer 8, pressure measuring tie-in 9, proportional pressure control valve 10 and connection oil pipe, the input end of pressure regulator valve group 27 is connected with the output terminal of pump group 26, the P mouth of control valve group 25, and the output terminal of pressure regulator valve group 27 is connected with tank mounting 34 by oil pipe.
The hydraulic control executive system of front shield stable shoe hydraulic system of shield machine is 4 groups, both Z1-Z4.Every group of executive system is connected on the oil circuit of control system in the front shield stable shoe hydraulic system of shield machine side by side; The control executive system is made up of control valve group 25 and stable boots oil cylinder 18.Control valve group 25 constitutes the control valve group by solenoid directional control valve 11, stacking type hydraulic control check valve 12, overlapping anti-cavitation valve 13, overlapping Double throttle check valve 14, overlapping relief valve 15, band remote control mouth X sequence valve 16 and one-way valve 17, pressure measuring tie-in 21 and 22, pressure transducer 23.The quantity that anterior shield is stablized boots oil cylinder 18 is 4, and on the madial wall of the uniform circle edge that is installed in anterior shield 32 in quarter turn place.The quantity that control valve group 25 in the front shield stable shoe hydraulic system of shield machine and anterior shield are stablized the hydraulic control executive system that boots oil cylinder 18 formed is 4 groups of both Z1-Z4; The quantity that control valve 25 is stablized boots oil cylinder 18 with anterior shield is corresponding.
Stablize the explanation of boots working principle according to anterior shield:
1, the anterior shield working pressure of stablizing boots oil cylinder 18 is adjusted by the proportional pressure control valve in the pressure regulator valve group 27 10, the while anterior shield is stablized the remote control mouth X that connects rodless cavity sequence valve 16 in the boots oil cylinder 18 and is linked to each other with the pressure hydraulic fluid port of proportional pressure control valve 10, realizes that the rodless cavity pressure that hydraulic system pressure variation and anterior shield are stablized boots oil cylinder 18 changes synchronously.
2, the pressure transducer 8 that is equipped with at the system pressure oil export of pressure regulator valve group 27 can show in the driver operation chamber with the force value of stablizing the pressure transducer 23 that the rodless cavity place of boots oil cylinder 18 is equipped with anterior shield; The force value of proportional pressure control valve 10 can be adjusted in the driver operation chamber by electric knob.
3, system pressure oil enters anterior shield through the B mouth of high pressure filter 6, Y type solenoid directional control valve 11 and oil pipe and stablizes in the rodless cavity of boots oil cylinder 18, oil cylinder piston stretches out, solenoid directional control valve 11 is got back to meta after reaching stroke and preset pressure, because of oil cylinder needs the pressurize hydraulic lock that superposeed; If oil cylinder 18 is pushed back because of obstacle effect, still can keep the pressure the same in the rodless cavity of oil cylinder at this moment with system, and the fluid that has more adds in the rodless cavity of oil cylinder 18 through sequence valve 16 and one-way valve 17, this moment, the rod chamber of oil cylinder 18 carried out repairing by overlapping anti-cavitation valve 13, and unnecessary fluid turns back to fuel tank through overlapping relief valve 15 in the rod chamber of oil cylinder 18; Oil cylinder 18 stretches out speed to be adjusted by overlapping Double throttle check valve 14, and the realization anterior shield is stablized the working pressure compensation of boots oil cylinder 18.
Claims (10)
1. front shield stable shoe hydraulic system of shield machine is characterized in that: stablize boots oil cylinder (18) with tank mounting (34) and be connected oil pipe and formed by pump group (26), pressure regulator valve group (27), control valve group (25) and anterior shield; Anterior shield is stablized on the circumferential inner wall that boots oil cylinder (18) is installed in the anterior shield (32) that cutterhead (24) are housed, control valve group (25) is housed on middle shield (33), after the middle shield is tail shield (29), and pump group (26), pressure regulator valve group (27) and tank mounting (34) in the front shield stable shoe hydraulic system of shield machine are housed on the chassis (28) in the wings; By the connection oil pipe control valve group (25), pump group (26), pressure regulator valve group (27), tank mounting (34) and anterior shield are stablized boots oil cylinder (18) and connect as one hydraulic system structure; Anterior shield is stablized the working pressure of boots oil cylinder (18) and is adjusted by the proportional pressure control valve (10) in the pressure regulator valve group (27), the while anterior shield is stablized the remote control mouth X that connects rodless cavity sequence valve (16) in the boots oil cylinder (18) and is linked to each other with the pressure hydraulic fluid port of proportional pressure control valve (10), and the rodless cavity pressure that variation of realization hydraulic system pressure and anterior shield are stablized boots oil cylinder (18) changes synchronously.
2. front shield stable shoe hydraulic system of shield machine according to claim 1 is characterized in that: control valve group (25) constitutes the control valve group by rodless cavity sequence valve (16) and one-way valve (17), pressure measuring tie-in (21,22), the pressure transducer (23) of solenoid directional control valve (11), stacking type hydraulic control check valve (12), overlapping anti-cavitation valve (13), overlapping Double throttle check valve (14), overlapping relief valve (15), band remote control mouth X.
3. front shield stable shoe hydraulic system of shield machine according to claim 1 is characterized in that: pump group (26) is made up of motor (3), coupling (4), duplex variable displacement pump (5), high pressure filter (6), one-way valve (7); The same tank mounting of fuel sucking pipe (34) of duplex variable displacement pump (5) is connected; One-way valve (7) is connected with pressure regulator valve group (27); The inlet of duplex variable displacement pump (5) is equipped with compensator (31) and butterfly valve (30), and pump group (26) is installed on the underpart supporting base of rear chassis (28), and tank mounting (34) is installed on the supporting traverse of rear chassis (28) upper end portion.
4. front shield stable shoe hydraulic system of shield machine according to claim 1 is characterized in that: pressure regulator valve group (27) is made up of pressure transducer (8), pressure measuring tie-in (9), proportional pressure control valve (10) and connection oil pipe; The input end of pressure regulator valve group (27) is connected with the output terminal of pump group (26), the P mouth of control valve group (25), and the output terminal of pressure regulator valve group (27) is connected by the same tank mounting of oil pipe (34).
5. front shield stable shoe hydraulic system of shield machine according to claim 1 and 2 is characterized in that: the hydraulic control executive system of front shield stable shoe hydraulic system of shield machine is 2 groups, 3 groups, 4 groups, 5 groups or 6 groups; Each is organized on the oil circuit that executive system is connected control system in the front shield stable shoe hydraulic system of shield machine side by side; The control executive system is stablized boots oil cylinder (18) by control valve group (25) and anterior shield and is formed.
6. front shield stable shoe hydraulic system of shield machine according to claim 1 is characterized in that: tank mounting (34) is made up of fuel tank (1), air-strainer (2).
7. front shield stable shoe hydraulic system of shield machine according to claim 1 and 2 is characterized in that: the quantity that anterior shield is stablized boots oil cylinder (18) is 2,3,4,5 or 6, and on the madial wall of the uniform circle edge that is installed in anterior shield (32).
8. front shield stable shoe hydraulic system of shield machine according to claim 1 and 2 is characterized in that: the quantity of the control valve group (25) in the front shield stable shoe hydraulic system of shield machine is 2 groups, 3 groups, 4 groups, 5 groups or 6 groups; And it is corresponding to stablize the quantity of boots oil cylinder (18) with anterior shield.
9. front shield stable shoe hydraulic system of shield machine according to claim 1 is characterized in that: the pressure transducer (8) that is equipped with at the system pressure oil export of pressure regulator valve group (27) can show in the driver operation chamber with the force value of stablizing the pressure transducer (23) that the rodless cavity place of boots oil cylinder (18) is equipped with anterior shield; The force value of proportional pressure control valve (10) can be adjusted in the driver operation chamber by electric knob.
10. front shield stable shoe hydraulic system of shield machine according to claim 1, it is characterized in that: system pressure oil enters anterior shield through the B mouth of high pressure filter (6), Y type solenoid directional control valve (11) and oil pipe and stablizes in the rodless cavity of boots oil cylinder (18), oil cylinder piston stretches out, solenoid directional control valve after reaching stroke and preset pressure (11) is got back to meta, because of oil cylinder needs the pressurize hydraulic lock that superposeed; If oil cylinder (18) is pushed back because of obstacle effect, still can keep the pressure the same in the rodless cavity of oil cylinder at this moment with system, and the fluid that has more adds in the rodless cavity of oil cylinder (18) through rodless cavity sequence valve (16) and one-way valve (17), the rod chamber of oil cylinder this moment (18) carries out repairing by overlapping anti-cavitation valve (13), and unnecessary fluid turns back to fuel tank through overlapping relief valve (15) in the rod chamber of oil cylinder (18); Oil cylinder (18) stretches out speed to be adjusted by overlapping Double throttle check valve (14), and the realization anterior shield is stablized the working pressure compensation of boots oil cylinder (18).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101882516A CN101705826B (en) | 2009-10-27 | 2009-10-27 | Front shield stable shoe hydraulic system of shield machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101882516A CN101705826B (en) | 2009-10-27 | 2009-10-27 | Front shield stable shoe hydraulic system of shield machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101705826A CN101705826A (en) | 2010-05-12 |
| CN101705826B true CN101705826B (en) | 2011-11-16 |
Family
ID=42376075
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009101882516A Active CN101705826B (en) | 2009-10-27 | 2009-10-27 | Front shield stable shoe hydraulic system of shield machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101705826B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106762884A (en) * | 2017-03-13 | 2017-05-31 | 浙江大学 | Based on the vertical tuning hydraulic systems of pressure compensated TBM |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102022120B (en) * | 2010-12-30 | 2012-07-04 | 昆山众备机械设备有限公司 | Thrust shoe plank for shield machine |
| CN102305081B (en) * | 2011-08-24 | 2015-04-01 | 江苏凯宫隧道机械有限公司 | Stabilization device for shield machine |
| CN102507163A (en) * | 2011-10-10 | 2012-06-20 | 沈阳重型机械集团有限责任公司 | Test loading device for shield tunneling machine under high water pressure |
| CN102364049B (en) * | 2011-10-19 | 2014-03-12 | 中铁隧道装备制造有限公司 | Hard rock composite TBM (Tunnel Boring Machine) suitable for composite stratum and tunneling mode thereof |
| CN104154055B (en) * | 2014-07-25 | 2016-04-13 | 浙江大学 | TBM test stand thrust load simulated solution pressing system |
| CN108331589B (en) * | 2017-12-21 | 2019-09-03 | 北方重工装备（沈阳）有限公司 | A kind of shield machine propulsion energy-saving control system |
| CN108999637A (en) * | 2018-09-28 | 2018-12-14 | 中铁工程装备集团技术服务有限公司 | The booster pump station and construction method of shield machine hydraulic system deep-well separate launching |
-
2009
- 2009-10-27 CN CN2009101882516A patent/CN101705826B/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106762884A (en) * | 2017-03-13 | 2017-05-31 | 浙江大学 | Based on the vertical tuning hydraulic systems of pressure compensated TBM |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101705826A (en) | 2010-05-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101705826B (en) | Front shield stable shoe hydraulic system of shield machine | |
| CN201531272U (en) | Hydraulic system of front shield stable boot of shield machine | |
| CN107923550B (en) | Depressurize valve cell | |
| CN1287094C (en) | Hydraulic propelling system for mining tunnel driving machine controlled by ratio flow pressure | |
| CN106438532B (en) | A kind of electric proportional control formula rock drill rock penetration performance automatic control system | |
| CN203655795U (en) | TBM thrust hydraulic system with adequate pressure flow in overall process | |
| CN101503960B (en) | Multi-pump combined driving shield-tunneling blade disc hydraulic system | |
| CN103727099B (en) | The TBM propulsion hydraulic system that pressure flow overall process adapts to | |
| CN104033154A (en) | TBM dual-mode switching pushing hydraulic system | |
| CN104196785B (en) | A kind of closed type energy-saving type shield propulsion hydraulic system using multiplex pump to drive | |
| CN204344992U (en) | Load sensing multi-way valve, load sensitive system and excavator | |
| GB1457493A (en) | Horizontal earth boring machine | |
| CN201801313U (en) | Crane and controller for compound action of crane | |
| CN105544631A (en) | Control loop of hydraulic bucket working device | |
| CN102859081A (en) | Pump suction charging system | |
| CN102635581B (en) | Hydraulic control system for ultra-deep radial well operations | |
| CN108894847A (en) | A kind of direct-push single-chamber pressurization becomes the control system of row's lubricating oil pump | |
| CN210315714U (en) | Hydraulic quick-change device of excavator | |
| CN203297181U (en) | System adopting load sensitivity control | |
| CN203604682U (en) | Electro-hydraulic large torque pore plate throttling valve | |
| CN203770258U (en) | Hydraulic system for stepless regulation of rotation torque of horizontal directional drilling machine | |
| CN203939503U (en) | A kind of TBM propulsion hydraulic system of double mode switching | |
| CN102587445A (en) | Load sensing flow control hydraulic system with energy regeneration and conservation | |
| CN201372799Y (en) | Hydraulic device for shield cutterhead | |
| CN216008397U (en) | Audio frequency environmental protection rig hydraulic system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: DALIAN HUARUI HEAVY INDUSTRY GROUP CO., LTD. Free format text: FORMER OWNER: HUARUI CO., LTD., DALIAN Effective date: 20120409 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20120409 Address after: 116013 Bayi Road, Xigang District, Liaoning, China, No. 169, No. Patentee after: Dalian Huarui Heavy Industry Group Co., Ltd. Address before: 116013 Bayi Road, Xigang District, Liaoning, China, No. 169, No. Patentee before: Huarui Co., Ltd., Dalian |