CN202753720U - Hydraulic balance suspension control system for mining vehicle - Google Patents
Hydraulic balance suspension control system for mining vehicle Download PDFInfo
- Publication number
- CN202753720U CN202753720U CN 201220278633 CN201220278633U CN202753720U CN 202753720 U CN202753720 U CN 202753720U CN 201220278633 CN201220278633 CN 201220278633 CN 201220278633 U CN201220278633 U CN 201220278633U CN 202753720 U CN202753720 U CN 202753720U
- Authority
- CN
- China
- Prior art keywords
- valve
- way
- explosion prevention
- dual circuit
- circuit explosion
- 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 - Lifetime
Links
Landscapes
- Vehicle Body Suspensions (AREA)
Abstract
The utility model belongs to the technical field of a balance suspension of a mining vehicle and particularly relates to a hydraulic balance suspension control system for the mining vehicle. The hydraulic balance suspension control system for the mining vehicle is composed of a plurality of control units. Each control unit comprises four double-pipeline anti-explosion valves, a two-position two-way electromagnetic reversing valve, a one-way throttle valve, an energy storing device, two elevating adjusting oil cylinders and a three-position four-way electromagnetic manual reversing valve. Two ends of the one-way throttle valve are respectively connected with the energy storing device and an opening B of the two-position two-way electromagnetic reversing valve. An opening A of the two-position two-way electromagnetic reversing valve is connected with an opening of a first double-pipeline anti-explosion valve. The other two openings of the first double-pipeline anti-explosion valve are respectively connected with two corresponding openings of a second double-pipeline anti-explosion valve, a third double-pipeline anti-explosion valve and a fourth double-pipeline anti-explosion valve. The other openings of the second double-pipeline anti-explosion valve and the third double-pipeline anti-explosion valve are respectively connected with the two elevating adjusting oil cylinders. An opening T of the three-position four-way electromagnetic manual reversing valve is connected with an opening of the fourth double-pipeline anti-explosion valve. A vehicle frame is possessed with good steadiness performance by adjusting travel of a balance suspension oil cylinder according to the hydraulic balance suspension control system for the mining vehicle and the aim of shifting between a flexible suspension and a rigid suspension can be achieved.
Description
Technical field
The utility model belongs to mine car balance suspension technical field, is specifically related to a kind of mine car hydro-cushion suspension control system.
Background technology
Existing balanced suspension of dump truck for mine is the hydro pneumatic suspension form.Hydro pneumatic suspension is as elastic medium, with a kind of suspension system of fluid as the power transmission medium with unreactable gas (being generally nitrogen).Hydro pneumatic suspension mainly is comprised of hydro-pneumatic spring, integrates elasticity and damping element.Present hydro pneumatic suspension mainly comes the rigidity of adjustable suspension by external dash pot valve, this external dash pot valve mainly is comprised of high-pressure overflow valve, middle pressurized overflow valve, low pressure relief valve and switch electromagnetic valve etc.This external dash pot valve can only be controlled each by pass valve connecting system by switch electromagnetic valve and whether change dash pot valve to the resistance of fluid, and then the rigidity of change suspension, when only having the high-pressure overflow valve connecting system, damping is maximum, the rigidity of suspension is namely maximum, and when the low pressure relief valve connecting system, damping is minimum, the rigidity of suspension is namely minimum, causes realizing the conversion and control mode more complicated of rigid suspension and compliance suspension state.
The utility model content
Technical problem to be solved in the utility model provides a kind of energy rapid and convenient make balance suspension change mine car hydro-cushion suspension control system between rigid suspension and compliance suspension state.
For solving the problems of the technologies described above, the technical solution of the utility model is:
A kind of mine car hydro-cushion suspension control system, formed by a plurality of control units, each control unit comprises four dual circuit explosion prevention valves, the 2/2-way solenoid directional control valve, one-way throttle valve, energy storage, two lift adjustment oil cylinders, 3-position 4-way electromagnetism hand change over valve, described one-way throttle valve one end connects described energy storage, the other end is connected with the B mouth of described 2/2-way solenoid directional control valve, the A mouth of described 2/2-way solenoid directional control valve connects a mouth of the first dual circuit explosion prevention valve, in addition two mouths of the first dual circuit explosion prevention valve respectively with the second dual circuit explosion prevention valve, two mouths that the 3rd dual circuit explosion prevention valve and the 4th dual circuit explosion prevention valve are corresponding connect, another mouthful of the second dual circuit explosion prevention valve connects the first hoist cylinder, another mouthful of the 3rd dual circuit explosion prevention valve connects the second hoist cylinder, and the T mouth of described 3-position 4-way electromagnetism hand change over valve is connected with another mouthful of the 4th dual circuit explosion prevention valve.The effect of described dual circuit explosion prevention valve is can block to reveal contacting of pipeline and system when revealing appears in connected pipeline, even if make system still can keep operation after the pipeline appearance leakage somewhere.The effect of described 2/2-way solenoid directional control valve is to realize the rigidity of hydraulic suspension and the switching between flexible two condition by commutation.The effect of described energy storage is the jacking stroke of control oil cylinder, makes vehicle also can have good ride comfort at complex road surface.The effect of described lift adjustment oil cylinder in this hydro-cushion suspension is mainly reflected in it for keeping the final actuating unit of ride comfort in the Vehicle Driving Cycle process.The Main Function of described one-way throttle valve is that vehicle is when running into pit, hydraulic oil in the energy storage can be supplemented to rapidly required oil cylinder, when vehicle runs into the projection road shocks, high pressure oil in the oil cylinder can push back energy storage with suitable speed by flow regulating valve, avoids excessive impact failure energy storage leather bag.Described hydraulic control one-way valve is the one-way passage state generally speaking, when system needs, can make it transfer the bi-directional path state to by hydraulic control, so that control hydraulic oil flows to.Described 3-position 4-way electromagnetism hand change over valve can be controlled by electromagnetism and manual dual mode, and the jacking that can regulate oil cylinder by control 3-position 4-way electromagnetism hand change over valve is high.
Described mine car hydro-cushion suspension control system, described each control unit also comprises two hydraulic control one-way valves, the A mouth of described 3-position 4-way electromagnetism hand change over valve is connected with the first hydraulic control one-way valve, and the B mouth of described 3-position 4-way electromagnetism hand change over valve is connected with the second hydraulic control one-way valve.Described hydraulic control one-way valve is the one-way passage state generally speaking, when system needs, can make it transfer the bi-directional path state to by hydraulic control, so that control hydraulic oil flows to.
Described mine car hydro-cushion suspension control system, described each control unit also comprises pressure transformer, described pressure transformer is connected with a mouth of described the 4th dual circuit explosion prevention valve.The Main Function of described pressure transformer is the force value of monitoring and its connecting line, and when pressure reached the pressure transformer setting value, control 3-position 4-way electromagnetism hand change over valve commutated to regulate the hydraulic pressure of pipe line value.
Described mine car hydro-cushion suspension control system, described each control unit also comprises Superimposed relief valve, described Superimposed relief valve two ends connect respectively described the first hydraulic control one-way valve and main oil return line.The effect of described Superimposed relief valve is the maximum hydraulic pressure value of pilot piping, when the hydraulic pressure value just can be passed through its release during greater than its setting value.
Described mine car hydro-cushion suspension control system, described each control unit also comprises six shutoff valves, wherein the first shutoff valve is arranged between 2/2-way solenoid directional control valve and the one-way throttle valve, between the second interface that the second shutoff valve and the 3rd shutoff valve are arranged on the first dual circuit explosion prevention valve 21 mouth corresponding with the second dual circuit explosion prevention valve 22, between the second interface that the 4th shutoff valve and the 5th shutoff valve are arranged on the first dual circuit explosion prevention valve 21 mouth corresponding with the 3rd dual circuit explosion prevention valve 22, the 6th shutoff valve is arranged on the outlet oil pipe of the 4th dual circuit explosion prevention valve.The effect of described shutoff valve is the break-make of the connected pipeline of control.
The beneficial effects of the utility model are to make by the stroke of adjustment suspension oil cylinder the vehicle frame plane be in level to guarantee preferably smooth-going performance, conveniently carry out the switching between compliance suspension and rigid suspension two condition, improved traveling comfort that mine car travels and the safety of unloading.
Description of drawings
Below in conjunction with the drawings and specific embodiments the technical solution of the utility model is further described in detail.
Fig. 1 is the schematic diagram of the utility model embodiment hydro-cushion suspension control system.
The specific embodiment
Hydro-cushion suspension control system as shown in Figure 1 comprises two independent control unit, and take one of them control unit as example, its one-way throttle valve 4 one ends connect described energy storage 5, and the other end is connected with the B mouth of 2/2-way solenoid directional control valve 3.The A mouth of 2/2-way solenoid directional control valve 3 connects the first interface of the first dual circuit explosion prevention valve 21.Two mouths that the second interface of the first dual circuit explosion prevention valve 21 and the 3rd interface are corresponding with the second dual circuit explosion prevention valve 22 connect.The second interface of the first dual circuit explosion prevention valve 21 and the 3rd interface also two mouths corresponding with the 3rd dual circuit explosion prevention valve 23 connect.The second interface of the first dual circuit explosion prevention valve 21 and the 3rd interface also two mouths corresponding with the 4th dual circuit explosion prevention valve 24 connect.Another mouthful of another of the second dual circuit explosion prevention valve 22 mouthful connection the first hoist cylinder 201, the three dual circuit explosion prevention valves 23 connects second hoist cylinder 202.The A mouth of 3-position 4-way electromagnetism hand change over valve 10 is connected with the first hydraulic control one-way valve 91, and the B mouth of 3-position 4-way electromagnetism hand change over valve 10 is connected with the second hydraulic control one-way valve 92.The P mouth of 3-position 4-way electromagnetism hand change over valve 10 and T mouth are respectively oil inlet port and the oil outlet of 3-position 4-way electromagnetism hand change over valve 10.The T mouth of 3-position 4-way electromagnetism hand change over valve is connected with another mouthful of the 4th dual circuit explosion prevention valve 24.Pressure transformer 7 also is connected with another mouthful of the 4th dual circuit explosion prevention valve 24.Superimposed relief valve 8 one ends connect the first hydraulic control one-way valve 91, and Superimposed relief valve 8 other ends connect the T mouth of 3-position 4-way electromagnetism hand change over valve 10.The first shutoff valve 11 is arranged between 2/2-way solenoid directional control valve 3 and the one-way throttle valve.Between the second interface that the second shutoff valve 12 and the 3rd shutoff valve 13 are arranged on the first dual circuit explosion prevention valve 21 mouth corresponding with the second dual circuit explosion prevention valve 22.Between the second interface that the 4th shutoff valve 14 and the 5th shutoff valve 15 are arranged on the first dual circuit explosion prevention valve 21 mouth corresponding with the 3rd dual circuit explosion prevention valve 22.The 6th shutoff valve 16 is arranged on the outlet oil pipe of the 4th dual circuit explosion prevention valve 24.The first shutoff valve 11, the second shutoff valve 12, the 3rd shutoff valve 13, the 4th shutoff valve 14 and the 5th shutoff valve 15 generally are in open mode, its pipeline two ends fluid is communicated with, just connected corresponding shutoff valve is turn-offed when the vehicle bridge somewhere needs repairing, the oil cylinder at other three vehicle bridge places of at this moment jacking makes needs the vehicle bridge of maintenance to be in suspended state with convenient for maintaining; The 6th shutoff valve 16 generally is in off state, fluid in the 4th dual circuit explosion prevention valve 24 can not be back to fuel tank through the 6th shutoff valve 16 at this moment, only have when system need to overhaul, just the 6th shutoff valve 16 can be opened, make each in-oil cylinder hydraulic oil be back to fuel tank.
When 2/2-way solenoid directional control valve 3 is in left position, the suspension of this moment is the compliance suspension state.In the normal vehicle operation process, any one wheel at oil cylinder place runs into pit, such as the first hoist cylinder 201, the wheel at the second hoist cylinder 202 places runs into pit, in-oil cylinder oil pressure descends immediately, at this moment, the high pressure oil that is positioned at 5 li of energy storages can pass through rapidly one-way throttle valve 4, shutoff valve 11, two UNICOM's solenoid directional control valves 3, the first dual circuit explosion prevention valve 21, the second dual circuit explosion prevention valve 22 enters lift adjustment oil cylinder 201, simultaneously by one-way throttle valve 4, shutoff valve 11, two UNICOM's solenoid directional control valves 3, the first dual circuit explosion prevention valve 21, the second dual circuit explosion prevention valve 23 enters the second hoist cylinder 202, adds the downward stroke of large tank and makes vehicle frame keep as far as possible horizontality.Otherwise, when if the wheel at oil cylinder place runs into the projection road surface in the process of moving, the oil pressure that the first hoist cylinder 201, the second hoist cylinder are 202 li raises immediately, the part high pressure oil pushes back to energy storage 5 through the second dual circuit explosion prevention valve 22 or the second dual circuit explosion prevention valve 23, the first dual circuit explosion prevention valve 21,2/2-way solenoid directional control valve 3, the first shutoff valve 11, one-way throttle valve 4, and the first hoist cylinder 201, the second hoist cylinder 202 reduce to down stroke makes vehicle frame keep as far as possible horizontality.By the stroke of energy storage 5 adjustings the first hoist cylinder 201, the second hoist cylinder 202, vehicle remains good ride comfort when rough road traveling.
When container need to hoist unloading, vehicle's center of gravity can then move along with the lifting of container, if vehicle is in the compliance suspension state, the energy storage of back axle suspension can compressedly make vehicle descend, the pressure oil of front axle suspension energy storage discharges the vehicle front suspension is raise, and causes the vehicle knockdown.In this hydro-cushion suspension control system, it is electric that 2/2-way solenoid directional control valve 3 is got, 2/2-way solenoid directional control valve 3 is changed to right position, it is the connection between energy storage 5 capable of blocking and the first hoist cylinder 201, the second hoist cylinder 202, the stroke of each oil cylinder remains constant, and suspension is converted to the rigid suspension state.
3-position 4-way electromagnetism hand change over valve 10 generally is in meta in the Vehicle Driving Cycle process, the first hydraulic control one-way valve 91 of this moment also is in the unidirectional cutoff state, only have when suspension and be subject to that Uneven road impacts and then when causing pressure in the explosion relief valve to be higher than the setting pressure of 25Mpa, Superimposed relief valve 8 just can be opened, the high pressure oil that flows out from the 4th dual circuit explosion prevention valve 24 will be back to fuel tank through Superimposed relief valve 8, and the effect of Superimposed relief valve 8 is exactly to the suspension system off-load when shock pressure is too high.Longer when the Vehicle Driving Cycle time, because the impact Unloading Effect of more number of times causes the oil mass of suspension system inside to reduce, when the suspension system internal oil pressure drops to a certain degree in the normal vehicle operation process, signal will be passed to chaufeur with the pressure transformer 7 that the 4th dual circuit explosion prevention valve 24 1 ends are connected, chaufeur can by manually or make the manual solenoid directional control valve 10 of 3-position 4-way electric, make the manual solenoid directional control valve 10 of 3-position 4-way switch to left position, hydraulic oil in the working connection will flow into from the P mouth of the manual solenoid directional control valve 10 of 3-position 4-way, replenishes hydraulic oil to suspension system.When whole suspension system need to be overhauled, can manually or make the manual solenoid directional control valve 10 of 3-position 4-way get electric, make it switch to right position, hydraulic oil in the working connection through the P mouth to the B mouth, again to the control mouth of the first hydraulic control one-way valve 91, make the first hydraulic control one-way valve 91 diconnecteds, the hydraulic oil in the suspension system just can be back to fuel tank through A mouth and the T mouth of the first hydraulic control one-way valve 91, the manual solenoid directional control valve 10 of 3-position 4-way.
The hydro-cushion suspension control system of the utility model embodiment can make by the stroke of adjustment suspension oil cylinder the vehicle frame plane be in level to guarantee preferably smooth-going performance, conveniently carry out the switching between compliance suspension and rigid suspension two condition, improved traveling comfort that mine car travels and the safety of unloading.
It should be noted last that, the above specific embodiment is only unrestricted in order to the technical solution of the utility model to be described, although with reference to preferred embodiment the utility model is had been described in detail, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement the technical solution of the utility model, and not breaking away from the spirit and scope of technical solutions of the utility model, it all should be encompassed in the middle of the claim scope of the present utility model.
Claims (5)
1. mine car hydro-cushion suspension control system, it is characterized in that, formed by a plurality of control units, each control unit comprises four dual circuit explosion prevention valves, the 2/2-way solenoid directional control valve, one-way throttle valve, energy storage, two lift adjustment oil cylinders, 3-position 4-way electromagnetism hand change over valve, described one-way throttle valve one end connects described energy storage, the other end is connected with the B mouth of described 2/2-way solenoid directional control valve, the A mouth of described 2/2-way solenoid directional control valve connects a mouth of the first dual circuit explosion prevention valve, in addition two mouths of the first dual circuit explosion prevention valve respectively with the second dual circuit explosion prevention valve, two mouths that the 3rd dual circuit explosion prevention valve and the 4th dual circuit explosion prevention valve are corresponding connect, another mouthful of the second dual circuit explosion prevention valve connects the first hoist cylinder, and another mouthful of the 3rd dual circuit explosion prevention valve connects the second hoist cylinder, and the T mouth of described 3-position 4-way electromagnetism hand change over valve is connected with a mouth of the 4th dual circuit explosion prevention valve.
2. mine car hydro-cushion suspension control system according to claim 1, it is characterized in that, described each control unit also comprises two hydraulic control one-way valves, the A mouth of described 3-position 4-way electromagnetism hand change over valve is connected with the first hydraulic control one-way valve, and the B mouth of described 3-position 4-way electromagnetism hand change over valve is connected with the second hydraulic control one-way valve.
3. described mine car hydro-cushion suspension control system according to claim 1 and 2 is characterized in that described each control unit also comprises pressure transformer, and described pressure transformer is connected with a mouth of described the 4th dual circuit explosion prevention valve.
4. described mine car hydro-cushion suspension control system according to claim 2 is characterized in that described each control unit also comprises Superimposed relief valve, and described Superimposed relief valve two ends connect respectively described the first hydraulic control one-way valve and main oil return line.
5. described mine car hydro-cushion suspension control system according to claim 1 and 2, it is characterized in that, described each control unit also comprises six shutoff valves, wherein the first shutoff valve is arranged between 2/2-way solenoid directional control valve and the one-way throttle valve, the second shutoff valve and the 3rd shutoff valve are arranged between the second interface of the first dual circuit explosion prevention valve mouth corresponding with the second dual circuit explosion prevention valve, the 4th shutoff valve and the 5th shutoff valve are arranged between the second interface of the first dual circuit explosion prevention valve mouth corresponding with the 3rd dual circuit explosion prevention valve, and the 6th shutoff valve is arranged on the main oil return line of the 4th dual circuit explosion prevention valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220278633 CN202753720U (en) | 2012-06-14 | 2012-06-14 | Hydraulic balance suspension control system for mining vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220278633 CN202753720U (en) | 2012-06-14 | 2012-06-14 | Hydraulic balance suspension control system for mining vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202753720U true CN202753720U (en) | 2013-02-27 |
Family
ID=47732913
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220278633 Expired - Lifetime CN202753720U (en) | 2012-06-14 | 2012-06-14 | Hydraulic balance suspension control system for mining vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202753720U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103552438A (en) * | 2013-10-29 | 2014-02-05 | 中联重科股份有限公司 | Hydro-pneumatic suspension system, control method thereof and engineering vehicle |
| CN103807227A (en) * | 2014-01-24 | 2014-05-21 | 大连液压件有限公司 | Heavy vehicle axle lifting hydraulic system |
| CN111173784A (en) * | 2020-01-16 | 2020-05-19 | 山东省农业机械科学研究院 | Full-independent suspension steering drive axle hydraulic system |
| CN114517798A (en) * | 2022-02-23 | 2022-05-20 | 三一重机有限公司 | Hydraulic drive system and working machine |
-
2012
- 2012-06-14 CN CN 201220278633 patent/CN202753720U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103552438A (en) * | 2013-10-29 | 2014-02-05 | 中联重科股份有限公司 | Hydro-pneumatic suspension system, control method thereof and engineering vehicle |
| CN103807227A (en) * | 2014-01-24 | 2014-05-21 | 大连液压件有限公司 | Heavy vehicle axle lifting hydraulic system |
| CN111173784A (en) * | 2020-01-16 | 2020-05-19 | 山东省农业机械科学研究院 | Full-independent suspension steering drive axle hydraulic system |
| CN111173784B (en) * | 2020-01-16 | 2021-10-08 | 山东省农业机械科学研究院 | Full-independent suspension steering drive axle hydraulic system |
| CN114517798A (en) * | 2022-02-23 | 2022-05-20 | 三一重机有限公司 | Hydraulic drive system and working machine |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202753720U (en) | Hydraulic balance suspension control system for mining vehicle | |
| CN201560992U (en) | Pilot-operated hydraulic lock multi-way directional valve set | |
| CN103009955B (en) | Air-pressure-adjustable type oil gas suspension system, air pressure adjusting method thereof and engineering vehicle | |
| CN102039791A (en) | Vehicle body dip angle adjusting unit, oil gas suspension mechanism and mobile crane | |
| CN104477798A (en) | Amplitude-variable control system of main arm of crane and crane | |
| CN112009193B (en) | Anti adjustable oil gas suspension hydraulic system that heels | |
| CN204432476U (en) | A kind of packing case lifting system of quarry tipper | |
| CN202827257U (en) | Hydraulic lifting control system for mine self-discharging vehicle and mine self-discharging vehicle | |
| CN106567904B (en) | Liftable hydro pneumatic suspension hydraulic system | |
| CN211449231U (en) | No-load and heavy-load damping-adjustable hydro-pneumatic suspension hydraulic control device | |
| CN201401385Y (en) | Speed-limiting valve | |
| CN102059973A (en) | Lifting hydraulic integrated system for large-tonnage electric-wheel mining dumper | |
| CN102963233B (en) | Liftable type anti-explosion rubber-tyred vehicle chassis | |
| CN212202673U (en) | Novel hydraulic system | |
| CN103879257A (en) | Suspension valves, oil gas suspension control system and engineering vehicle | |
| CN204385793U (en) | The control device that a kind of excavator swing arm potential energy is recycled | |
| CN103358850A (en) | Hydro-pneumatic suspension system and engineering vehicle | |
| CN102616700A (en) | Oil and air hybrid driven lifting control device | |
| CN102424045B (en) | Emergency pressure increasing valve for braking system | |
| CN201970903U (en) | Lifting hydraulic integration system of a large-ton electric-wheel mine dump truck | |
| CN109808435A (en) | Suspension system and vehicle | |
| CN201670154U (en) | Cushioning device for luffing cylinder of crane jib | |
| CN209649988U (en) | Suspension system and vehicle | |
| CN202378853U (en) | Emergency pressurizing valve for braking system | |
| CN104692254A (en) | Crane secondary ascension downslide prevention system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: AEROSPACE HEAVY ENGINEERING EQUIPMENT CO., LTD. Free format text: FORMER OWNER: CHINA SPACE SANJIANG GROUP CO., LTD. Effective date: 20140416 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 430040 WUHAN, HUBEI PROVINCE TO: 432000 XIAOGAN, HUBEI PROVINCE |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20140416 Address after: 432000 No. 1 Wan Shan Road, Xiaogan Development Zone, Hubei Patentee after: Aerospace Heavy Engineering Equipment Co., Ltd. Address before: 430040 Wuhan, East and West Lake District, Jinshan Road, No. 9, Hubei Patentee before: China Aerospace Sanjiang Group Co.,Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20130227 |
|
| CX01 | Expiry of patent term |