CN201771512U - Hydraulic control system of active articulated cylinder in shield machine - Google Patents
Hydraulic control system of active articulated cylinder in shield machine Download PDFInfo
- Publication number
- CN201771512U CN201771512U CN2010205065781U CN201020506578U CN201771512U CN 201771512 U CN201771512 U CN 201771512U CN 2010205065781 U CN2010205065781 U CN 2010205065781U CN 201020506578 U CN201020506578 U CN 201020506578U CN 201771512 U CN201771512 U CN 201771512U
- Authority
- CN
- China
- Prior art keywords
- valve
- hydraulic
- hydraulic control
- control
- hydraulic cylinder
- 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.)
- Expired - Fee Related
Links
- 230000008676 import Effects 0.000 claims description 10
- 238000007667 floating Methods 0.000 abstract description 4
- 230000008901 benefit Effects 0.000 abstract description 3
- 239000003921 oil Substances 0.000 description 45
- 239000010720 hydraulic oil Substances 0.000 description 4
- 238000009412 basement excavation Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 206010044565 Tremor Diseases 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
Images
Landscapes
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
A hydraulic control system of an active articulated cylinder in a shield machine comprises 16 active articulated hydraulic cylinders in four groups and four groups of hydraulic control loops the same with the hydraulic cylinders, wherein each hydraulic control loop comprises a three-position four-way electromagnetic reversing valve, a superposition type hydraulic control one-way valve, a superposition type overflow valve, a pressure relay, a pressure-measuring joint and two hydraulic control one-way valves, a two-position three-way electromagnetic reversing valve and an overflow valve, which are connected via pipelines. The advantages of the hydraulic control system provided by the utility model are that the cylinders are flexibly controlled by the hydraulic loops; and passive hydraulic cylinders are in a floating state, not only satisfying the requirement to flexibly control the hydraulic cylinders, but also prolonging the service life of the cylinders at the same time.
Description
Technical field
The utility model relates to the mining machines technical field, relates in particular to the shield machine hydraulic system, provides power for shield machine changes direction of advance.
Background technology
Shield excavation machine is that multidisciplinary technology such as a kind of current collection gas, hydraulic pressure, measurement guiding, control, material are in the large-scale synthesis construction equipment of the construction of tunnel special use of one.Along with the development of economic society, the demand of shield excavation machine is constantly increased.The shield structure of existing initiatively radial type shield machine initiatively articulated mounting is the shield excavation machine propulsion system, the curve driving that not only is used for shield structure small radius, also be used for the shield driving direction correcting, turning, the curve of finishing shield machine advanced, attitude is controlled, rectify a deviation and be synchronized with the movement, shield machine can be advanced along the route that configures in advance, is one of critical system of shield machine.The shield machine of a diameter of phi 6m, initiatively hinged cylinder quantity is about 16, generally is divided into four groups, and every group of control loop is identical, divides several controls in upper and lower, left and right.The existing initiatively design of articulated system, every group of cylinder adopts an electromagnetic valve and hydraulic lock control.Its deficiency is: when needs were turned, one group of cylinder of work needed high voltage control, and compression and stretching that idle cylinder can only be passive because passive in-cylinder pressure shakiness can not be controlled when finishing go to action flexibly, cause a deviation; Passive in addition cylinder is in passive compression with when stretching, and can produce high pressure in the cylinder but can not drain charge, and the performance of cylinder is impacted even damages, and repairs trouble, both influenced the duration also can bring enormous economic loss.
Summary of the invention
Goal of the invention of the present utility model is, hydraulic circuit to shield machine improves, make the passive cylinder of shield machine be in the floating position by improved hydraulic circuit, thereby, realize the flexible control of hydraulic circuit cylinder for the hydraulic cylinder operate as normal provides stable control mode.
Technical solution of the present utility model is achieved in that initiatively hinged cylinder hydraulic control system of shield machine, comprise quadripartite 16 hinged hydraulic cylinders of active and four groups of identical hydraulic control circuits, four groups of identical hydraulic control circuits comprise the 3-position 4-way solenoid operated directional valve, stacking type hydraulic control check valve, the superposing type overflow valve, pressure switch and pressure measuring tie-in, connect by pipeline with upper-part, the superposing type overflow valve and the rod chamber connecting line of the hydraulic cylinder of the hinged hydraulic cylinder group of active are connected into the rod chamber oil circuit of hydraulic cylinder with pipeline, the superposing type overflow valve and the rodless cavity connecting line of the hydraulic cylinder of the hinged hydraulic cylinder group of active are connected into the rodless cavity oil circuit of hydraulic cylinder with pipeline, an import of 3-position 4-way solenoid operated directional valve is that the P mouth is connected with the oil return opening of master control oil circuit, an outlet of 3-position 4-way solenoid operated directional valve is that the T mouth is connected with the oil return opening of master control oil circuit, the 3-position 4-way solenoid operated directional valve is by automatically controlled control, it is characterized in that described hydraulic control circuit also comprises 2 of hydraulic control one-way valves, 1 of 1 of two-position three way solenoid operated directional valve and overflow valve; Wherein 1 in 2 hydraulic control one-way valves is the rodless cavity oil circuit hydraulic control one-way valve of hydraulic cylinder, another is the rod chamber oil circuit hydraulic control one-way valve of hydraulic cylinder, rodless cavity oil circuit hydraulic control one-way valve in 2 hydraulic control one-way valves places between the superposing type overflow valve and rodless cavity connecting line of rodless cavity oil circuit of control loop hydraulic cylinder, its import is connected with the rodless cavity connecting line of hydraulic cylinder group, and outlet is connected with the import of overflow valve; Rod chamber oil circuit hydraulic control one-way valve places between the superposing type overflow valve and rod chamber connecting line of rod chamber oil circuit of control loop hydraulic cylinder, and its import is connected with the rod chamber connecting line of hydraulic cylinder group, and outlet is that the T mouth is connected with the oil return opening of master control oil circuit; Described two-position three way solenoid operated directional valve is by automatically controlled control, two-position three way solenoid operated directional valve oil-in is that the P mouth is connected with the oil-feed port of master control oil circuit, two-position three way solenoid operated directional valve oil return opening is that the T mouth is connected with the oil return opening of master control oil circuit, the control port of two-position three way solenoid operated directional valve is connected with the main valve plug control port of 2 hydraulic control one-way valves, is used to control the main valve plug switch of 2 hydraulic control one-way valves; Described overflow valve is four groups of overflow valves that hydraulic control circuit is public, and the import of overflow valve is connected with the also contact G of the outlet that places four groups of hydraulic control circuit hydraulic cylinder rodless cavity hydraulic control one-way valves, and the overflow valve outlet is that the T mouth is connected with the oil return opening of master control oil circuit.
Shield machine described in the utility model is hinged cylinder hydraulic control system initiatively, it is characterized in that described hydraulic control circuit makes valve piece A and two valve pieces of valve piece B: valve piece A comprises the 3-position 4-way solenoid operated directional valve, stacking type hydraulic control check valve, the superposing type overflow valve, pressure switch and pressure measuring tie-in, 2 hydraulic control one-way valves and two-position three way solenoid operated directional valve, each component in the valve piece A are communicated with by pipeline, four interfaces are set on the valve piece A, are respectively: the interface that is connected with the rod chamber connecting line of the hydraulic cylinder of hinged hydraulic cylinder group initiatively is the A mouth, the interface that is connected with the rodless cavity connecting line of the hydraulic cylinder of hinged hydraulic cylinder group initiatively is the B mouth, be the interface that is connected of T mouth with oil-feed port with the oil return opening of master control oil circuit be the interface that the P mouth is connected with the master control oil circuit; Valve piece B is the separate valves piece of overflow valve, two interfaces are set on the valve piece B, are respectively: with the oil return opening of master control oil circuit be interface that the T mouth is connected be the B1 mouth with four groups of hydraulic control circuits in the common and contact of the outlet of hydraulic cylinder rodless cavity hydraulic control one-way valve be that the interface that the G point is connected is the A1 mouth.
Control procedure of the present utility model is: under the normal condition, the hinged hydraulic cylinder control oil circuit hydraulic oil that is in working group is led to through 3-position 4-way solenoid operated directional valve, stacking type hydraulic control check valve and superposing type overflow valve by the P mouth uses oil drop, this moment, the two-position three way solenoid operated directional valve was subjected to automatically controlled control in the closed position, because the control port of two-position three way solenoid operated directional valve is connected with the main valve plug control port of 2 hydraulic control one-way valves, the main valve plug switch of 2 hydraulic control one-way valves of control is so this moment, hydraulic control one-way valve was in locking position; When hinged hydraulic cylinder is in passive group of state, hinged hydraulic cylinder control oil circuit hydraulic oil is led to through 3-position 4-way solenoid operated directional valve, stacking type hydraulic control check valve and superposing type overflow valve by the P mouth uses oil drop, this moment, the two-position three way solenoid operated directional valve was shown in an open position by automatically controlled control, thereby make hydraulic control one-way valve be in open position, this moment, passive group hinged hydraulic cylinder was in quick condition, and operating pressure is set by overflow valve; The programmable logic controller (PLC) (PLC) of the system that feeds back signal to of pressure switch output 4-20mA plays monitoring system pressure effect constantly, and sets for overflow valve pressure foundation is provided.In four groups of hydraulic control loops, four are connected the hydraulic control one-way valve that hinged hydraulic cylinder does not have the bar side, and the oil return line unification is connected the A1 mouth of valve piece B, by the B1 mouth oil return of overflow valve through valve piece B, provide pressure to guarantee for passive group hinged hydraulic cylinder is in quick condition.
Compared with prior art, the utility model has the advantages that: utilize two-position three way electromagnetic switch control hydraulic control one-way valve Push And Release, realized the flexible control of hydraulic circuit cylinder; The shared overflow valve of total oil return line of four groups of control loops of this hydraulic control system is as counterbalance valve, make passive hydraulic cylinder reasonably be with pressure work in the pressure limit, make passive hydraulic cylinder be in quick condition, so both satisfied the requirement of flexible control hydraulic cylinder, the application life of also having improved cylinder simultaneously is for shield machine has brought huge potential benefit at underground construction.
Description of drawings
The utility model drawings attached 1 width of cloth, wherein:
Fig. 1 is one group of hydraulic pressure control loop system schematic diagram of the present utility model.
In the accompanying drawing: 1. 3-position 4-way solenoid operated directional valve, 2. two-position three way solenoid operated directional valve, 3. stacking type hydraulic control check valve, 4. superposing type overflow valve, 5. overflow valve, 6. hydraulic control one-way valve, 7. pressure measuring tie-in, 8. pressure switch, 9, valve piece A, 10, valve piece B, 11, common and the contact of four groups of rodless cavity oil circuit hydraulic control one-way valves (6A) vent line, 12, the interface that valve piece A is connected with the rod chamber connecting line of the hydraulic cylinder of the hinged hydraulic cylinder group of active, 13, the interface that valve piece A is connected with the rodless cavity connecting line of the hydraulic cylinder of the hinged hydraulic cylinder group of active, 14, the interface that valve piece A is connected with the T mouth of master control oil circuit, 15, the interface that valve piece A is connected with the P mouth of master control oil circuit, 16, the interface (B1) that valve piece B is connected with the T mouth of master control oil circuit, 17, the interface (A1) that the outlet of the hydraulic cylinder rodless cavity hydraulic control one-way valve (6A) in valve piece B and the four groups of hydraulic control circuits is common and contact G is connected.
The specific embodiment
The utility model is described in further detail below in conjunction with the embodiment of accompanying drawing.16 hinged cylinders of the shield machine of embodiment, divide and do 4 groups, every group of 4 cylinders, every group of hinged cylinder adapted one cover hydraulic control loop, the hydraulic control loop of each group is identical, routing valve piece A and four groups of shared oil return overflow valve piece B formations are returned in every group of hydraulic control, 1 one of 3-position 4-way solenoid operated directional valves are housed, 3 one of stacking type hydraulic control check valves on the valve piece A, 4 one of superposing type overflow valves, two of hydraulic control one- way valve 6A, 6B, 2 one of two-position three way solenoid operated directional valves, 8 one of pressure switches and pressure measuring tie-in 7; On the valve piece B overflow valve 5 is housed then; Valve piece A and valve piece B are valve piece independently; External interface P, T on the valve piece, A, B, A1, B1 are flange arrangement, all adopt steel pipe to connect.During operate as normal, the hinged cylinder control oil channel hydraulic oil that is in working group is led to through 3-position 4-way solenoid operated directional valve 1, stacking type hydraulic control check valve 3 and superposing type overflow valve 4 by the P mouth uses oil drop, this moment, two-position three way solenoid operated directional valve 2 was in the closed position, and hydraulic control one- way valve 6A, 6B are in locking position; When hinged cylinder is in passive group, being in passive group hinged cylinder control oil channel hydraulic oil is led to through 3-position 4-way solenoid operated directional valve 1, stacking type hydraulic control check valve 3 and superposing type overflow valve 4 by the P mouth and uses oil drop, two-position three way solenoid operated directional valve 2 is shown in an open position at this moment, hydraulic control one- way valve 6A, 6B are in open position, this moment, passive group hinged oil cylinder was in the floating position, and operating pressure is set by overflow valve 5; The PLC of the system that feeds back signal to of described pressure switch 8 output 4-20mA plays monitoring system pressure effect constantly, and sets for overflow valve 5 pressure foundation is provided.In four groups of hydraulic control loops, four hydraulic control one- way valve 6A, 6B that are connected hinged cylinder piston side, the oil return line unification is connected the A1 mouth of described valve piece B, by the B1 mouth oil return of overflow valve 5 through valve piece B, provides pressure to guarantee for passive group hinged oil cylinder is in the floating position.
Claims (2)
1. shield machine hinged cylinder hydraulic control system initiatively, comprise quadripartite 16 hinged hydraulic cylinders of active and four groups of identical hydraulic control circuits, four groups of identical hydraulic control circuits comprise 3-position 4-way solenoid operated directional valve (1), stacking type hydraulic control check valve (3), superposing type overflow valve (4), pressure switch (8) and pressure measuring tie-in (7), connect by pipeline with upper-part, the superposing type overflow valve (4) and the rod chamber connecting line of the hydraulic cylinder of the hinged hydraulic cylinder group of active are connected into the rod chamber oil circuit of hydraulic cylinder with pipeline, the superposing type overflow valve (4) and the rodless cavity connecting line of the hydraulic cylinder of the hinged hydraulic cylinder group of active are connected into the rodless cavity oil circuit of hydraulic cylinder with pipeline, an import of 3-position 4-way solenoid operated directional valve (1) is that the P mouth is connected with the oil-feed port of master control oil circuit, an outlet of 3-position 4-way solenoid operated directional valve (1) is that the T mouth is connected with the oil return opening of master control oil circuit, 3-position 4-way solenoid operated directional valve (1) is by automatically controlled control, it is characterized in that described hydraulic control circuit also comprises hydraulic control one-way valve (6A, 6B) 2, (5) 1 of (2) 1 of two-position three way solenoid operated directional valves and overflow valves; Wherein 1 in 2 hydraulic control one-way valves (6A, 6B) is the rodless cavity oil circuit hydraulic control one-way valve (6A) of hydraulic cylinder, another is the rod chamber oil circuit hydraulic control one-way valve (6B) of hydraulic cylinder, rodless cavity oil circuit hydraulic control one-way valve (6A) in 2 hydraulic control one-way valves (6A, 6B) places between the superposing type overflow valve (4) and rodless cavity connecting line of rodless cavity oil circuit of control loop hydraulic cylinder, its import is connected with the rodless cavity connecting line of hydraulic cylinder group, and outlet is connected with the import of overflow valve (5); Rod chamber oil circuit hydraulic control one-way valve (6B) places between the superposing type overflow valve (4) and rod chamber connecting line of rod chamber oil circuit of control loop hydraulic cylinder, its import is connected with the rod chamber connecting line of hydraulic cylinder group, and outlet is that the T mouth is connected with the oil return opening of master control oil circuit; Described two-position three way solenoid operated directional valve (2) is by automatically controlled control, two-position three way solenoid operated directional valve (2) oil-in is that the P mouth is connected with the oil-feed port of master control oil circuit, two-position three way solenoid operated directional valve (2) oil return opening is that the T mouth is connected with the oil return opening of master control oil circuit, the control port of two-position three way solenoid operated directional valve (2) is connected with the main valve plug control port of 2 hydraulic control one-way valves (6A, 6B), is used to control the main valve plug switch of 2 hydraulic control one-way valves (6A, 6B); Described overflow valve (5) is four groups of overflow valves that hydraulic control circuit is public, the import of overflow valve (5) is connected with the also contact G of the outlet that places four groups of hydraulic control circuit hydraulic cylinder rodless cavity hydraulic control one-way valves (6A), and overflow valve (5) outlet is that the T mouth is connected with the oil return opening of master control oil circuit.
2. according to the hinged cylinder hydraulic control system of the described shield machine active of claim 1, it is characterized in that described hydraulic control circuit makes valve piece A and two valve pieces of valve piece B: valve piece A comprises 3-position 4-way solenoid operated directional valve (1), stacking type hydraulic control check valve (3), superposing type overflow valve (4), pressure switch (8) and pressure measuring tie-in (7), 2 hydraulic control one-way valve (6A, 6B) with two-position three way solenoid operated directional valve (2), each component in the valve piece A are communicated with by pipeline, four interfaces are set on the valve piece A, are respectively: the interface that is connected with the rod chamber connecting line of the hydraulic cylinder of hinged hydraulic cylinder group initiatively is the A mouth, the interface that is connected with the rodless cavity connecting line of the hydraulic cylinder of hinged hydraulic cylinder group initiatively is the B mouth, be the interface that is connected of T mouth with oil-feed port with the oil return opening of master control oil circuit be the interface that the P mouth is connected with the master control oil circuit; Valve piece B is the separate valves piece of overflow valve (5), two interfaces are set on the valve piece B, are respectively: with the oil return opening of master control oil circuit be interface that the T mouth is connected be the B1 mouth with four groups of hydraulic control circuits in the common and contact of the outlet of hydraulic cylinder rodless cavity hydraulic control one-way valve (6A) be that the interface that the G point is connected is the A1 mouth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205065781U CN201771512U (en) | 2010-08-25 | 2010-08-25 | Hydraulic control system of active articulated cylinder in shield machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205065781U CN201771512U (en) | 2010-08-25 | 2010-08-25 | Hydraulic control system of active articulated cylinder in shield machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201771512U true CN201771512U (en) | 2011-03-23 |
Family
ID=43751357
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205065781U Expired - Fee Related CN201771512U (en) | 2010-08-25 | 2010-08-25 | Hydraulic control system of active articulated cylinder in shield machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201771512U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103047202A (en) * | 2012-09-28 | 2013-04-17 | 江苏南华地下空间研究所有限公司 | Hydraulic system of comprehensive experiment platform |
| CN105683451A (en) * | 2013-10-30 | 2016-06-15 | 沃尔沃建造设备有限公司 | Hydraulic system of construction equipment, having float function |
| CN108661963A (en) * | 2018-08-15 | 2018-10-16 | 中铁工程装备集团有限公司 | A kind of globular hinge hydraulic system for small curve turning shield machine |
| CN110284891A (en) * | 2019-07-09 | 2019-09-27 | 浙江大学 | A kind of active shield machine telescopic oscillating system |
| CN110486027A (en) * | 2019-09-06 | 2019-11-22 | 盾构及掘进技术国家重点实验室 | A kind of shield machine hydraulic propelling system using Redundant Control |
| CN111894917A (en) * | 2019-05-06 | 2020-11-06 | 中冶京诚工程技术有限公司 | Hydraulic control devices and systems |
| CN112747014A (en) * | 2019-10-31 | 2021-05-04 | 长春设备工艺研究所 | On-load backspacing hydraulic circuit |
-
2010
- 2010-08-25 CN CN2010205065781U patent/CN201771512U/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103047202A (en) * | 2012-09-28 | 2013-04-17 | 江苏南华地下空间研究所有限公司 | Hydraulic system of comprehensive experiment platform |
| CN103047202B (en) * | 2012-09-28 | 2016-12-21 | 江苏南华地下空间研究所有限公司 | The hydraulic system of synthesis experiment platform |
| CN105683451A (en) * | 2013-10-30 | 2016-06-15 | 沃尔沃建造设备有限公司 | Hydraulic system of construction equipment, having float function |
| CN108661963A (en) * | 2018-08-15 | 2018-10-16 | 中铁工程装备集团有限公司 | A kind of globular hinge hydraulic system for small curve turning shield machine |
| CN108661963B (en) * | 2018-08-15 | 2024-02-02 | 中铁工程装备集团有限公司 | Spherical hinged hydraulic system for small-curve turning shield machine |
| CN111894917A (en) * | 2019-05-06 | 2020-11-06 | 中冶京诚工程技术有限公司 | Hydraulic control devices and systems |
| CN111894917B (en) * | 2019-05-06 | 2024-04-26 | 中冶京诚工程技术有限公司 | Hydraulic control devices and systems |
| CN110284891A (en) * | 2019-07-09 | 2019-09-27 | 浙江大学 | A kind of active shield machine telescopic oscillating system |
| CN110284891B (en) * | 2019-07-09 | 2020-06-16 | 浙江大学 | Active shield constructs flexible swing system of machine |
| CN110486027A (en) * | 2019-09-06 | 2019-11-22 | 盾构及掘进技术国家重点实验室 | A kind of shield machine hydraulic propelling system using Redundant Control |
| CN112747014A (en) * | 2019-10-31 | 2021-05-04 | 长春设备工艺研究所 | On-load backspacing hydraulic circuit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201771512U (en) | Hydraulic control system of active articulated cylinder in shield machine | |
| CN209761417U (en) | Hydraulic control system for cutting arm of boom-type heading machine | |
| CN203189370U (en) | Modularized combined type electro-hydraulic multi-way valve system adopting compact type two-way cartridge inserted valve | |
| CN202165089U (en) | Hydraulic control system of mud outlet gate open-close cylinder of spiral conveyer of shield machine | |
| CN108661963B (en) | Spherical hinged hydraulic system for small-curve turning shield machine | |
| CN105332712B (en) | A kind of emergent hydraulic means of slurry shield machine circulation system | |
| CN101851940B (en) | Hydraulic control pipeline of excavator | |
| CN202882751U (en) | Improved rock drill hydraulic system based on excavator hydraulic system | |
| CN107461375A (en) | Complete-section tunnel boring machine is hinged hydraulic system | |
| CN102287418B (en) | Hydraulic cylinder control device capable of realizing accurate half-way stoppage | |
| CN203948360U (en) | A kind of crawler-type tunnel drilling rig and hydraulic system thereof | |
| CN110499798A (en) | A kind of explosion-proof valve, hydraulic control system, hydraulic control method and excavator | |
| CN205315005U (en) | Emergent hydraulic means of slurry shield machine circulation system | |
| CN103835214A (en) | Hydraulic loop for tail door mechanism of road milling machine | |
| CN209856134U (en) | Quick-change control system and excavator | |
| CN203428832U (en) | Double-winch control system and engineering machinery | |
| CN114151028B (en) | Casing clamping device and full casing full rotary drilling rig | |
| CN102678663B (en) | Oil cylinder for excavator and excavator with cylinder | |
| CN202228460U (en) | Oil circuit valve block integrated device | |
| CN201884369U (en) | Automatic hydraulic oil way switching device | |
| CN207145665U (en) | A kind of guide's oil circuit controls switching valve | |
| CN110486027B (en) | Shield tunneling machine hydraulic propulsion system adopting redundancy control | |
| CN203067381U (en) | Multi-oil cylinder synchronous control system and engineering machinery | |
| CN202732522U (en) | Proportional multi-way valve used on construction machine | |
| CN202418076U (en) | Combined type multiple directional control valve for full-hydraulic underground riling rig for coal mine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110323 Termination date: 20150825 |
|
| EXPY | Termination of patent right or utility model |