CN202229887U - Water tightness detection device for diesel engine cylinder block water jacket and cylinder sleeve water jacket - Google Patents
Water tightness detection device for diesel engine cylinder block water jacket and cylinder sleeve water jacket Download PDFInfo
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- CN202229887U CN202229887U CN2011203272828U CN201120327282U CN202229887U CN 202229887 U CN202229887 U CN 202229887U CN 2011203272828 U CN2011203272828 U CN 2011203272828U CN 201120327282 U CN201120327282 U CN 201120327282U CN 202229887 U CN202229887 U CN 202229887U
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Abstract
A water tightness detection device for a diesel engine cylinder block water jacket and a cylinder sleeve water jacket comprises a water tank for supplying water source and a power unit for water injection and pressure boost of a diesel engine to be detected. The water tank is installed on a cart provided with trundles capable of moving, the water tank is connected with the power unit through a water injection pipe and a water return pipe, and the trundles capable of moving are arranged on the lower portion of the power unit which is connected with a compression air source. The water tightness detection device can conduct water tightness test on a product manufacture field, thereby improving work efficiency, reducing field occupation, improving lifter device availability, improving work environment, lifting product quality and decreasing potential safety hazards. The water tightness detection device is applicable to the water tightness tests of the cylinder block water jacket and the cylinder sleeve water jacket of large-scale marine low speed diesel engines.
Description
Technical field:
The utility model relates to a kind of cylinder of diesel engine performance detection device, particularly relates to a kind of watertightness pick-up unit that is used for large-scale marine low speed diesel engine block jacket and cylinder sleeve water jacket.
Background technology:
The water cavity that is formed by marine low speed diesel engine block jacket and cylinder sleeve water jacket has constituted a cooling system; Its role is to take away the heat that produces in the diesel engine part work; The temperature of these parts is remained in the scope that the diesel engine operate as normal permitted, avoid impaired because of bearing excessive thermal stress.
If cause chilled water to be revealed because of block jacket and cylinder sleeve water jacket watertightness performance are bad, and the heat can't diesel engine be worked the time is taken away, and then can cause following adverse consequences:
1, reduces the mechanical property of material, destroy the normal cooperation between parts, cause serious wearing and tearing, even can cause phenomenon such as seizure of piston;
2, increase the thermal stress and the thermal deformation of part, even make cylinder head and piston crown place produce fire check;
3, piston ring is followed the string or in annular groove, burn out; Air valve also maybe be because of overheated distortion and the warpage of producing, and this can make combustion gas reveal in a large number, thereby the power of diesel oil is descended;
4, the temperature of cylinder wall is too high, and the air inflow that charges into is reduced, and also can cause the reduction of power;
5, high temperature can cause the decomposition and the coking of lubricating oil, destroys the normal lubricated of part.
The watertightness of marine diesel block jacket and cylinder sleeve water jacket is related to the performance of diesel engine; For avoiding water jacket generation leakage accident in the diesel engine operation process; Just be necessary after block jacket and the installation of cylinder sleeve water jacket, to carry out watertightness and detect, with the quality of check parts and installation thereof.
The structure of marine diesel block jacket and cylinder sleeve water jacket generally is divided into two kinds, please see Fig. 1 and Fig. 2.Fig. 1 is the structural representation of marine low speed diesel engine dry type type cylinder jacket water jacket; The cylinder sleeve 1 of cylinder of diesel engine, cylinder cap 5 are connected with vent valve 6 from bottom to top successively to be combined; Cylinder sleeve water jacket 2 is placed on the periphery of cylinder sleeve 1; Form the cylinder sleeve water cavity A that can feed chilled water with it, cylinder cap water jacket 4 is placed on the periphery of cylinder cap 5, forms the cylinder cap water cavity B that can feed chilled water with it; This cylinder cap water cavity B is communicated with cylinder sleeve water cavity A through last cooling tube 3B; Vent valve 6 forms vent valve water cavity C with the junction of cylinder cap 5, and this vent valve water cavity C is communicated with cylinder cap water cavity B through the inner inclined tube (not shown) of cylinder cap, thereby cylinder sleeve water cavity A, three water cavities of cylinder cap water cavity B and vent valve water cavity C are communicated with the cooling water flow way system that constitutes an integral body.Fig. 2 is the structural representation of marine low speed diesel engine wet type type block jacket and cylinder sleeve water jacket; The cylinder block 7 of cylinder of diesel engine, cylinder sleeve 1, cylinder cap 5 are connected with vent valve 6 from bottom to top successively to be combined; Wherein cylinder block 7 constitutes cylinder block water cavity D with cylinder sleeve 1 through O RunddichtringO 8 in the junction; Form cylinder sleeve water cavity A between cylinder sleeve 1 and the cylinder sleeve water jacket 2; Form cylinder cap water cavity B between cylinder cap 5 and the cylinder cap water jacket 4; Form vent valve water cavity C between vent valve 6 and the cylinder cap 5, cylinder block water cavity D is communicated with cylinder sleeve water cavity A through following cooling tube 3A, and cylinder sleeve water cavity A is communicated with cylinder cap water cavity B through last cooling tube 3B; Cylinder cap water cavity B is communicated with vent valve water cavity C through the inner inclined tube of cylinder cap, thereby cylinder block water cavity D, cylinder sleeve water cavity A, four water cavities of cylinder cap water cavity B and vent valve water cavity C are communicated with the cooling water flow way system that constitutes an integral body.
Arrangement according to manufacturing schedule; Cylinder sleeve water cavity A, cylinder cap water cavity B, vent valve water cavity C, cylinder block water cavity D both can combine and carry out waterproof test simultaneously, also can be separately cylinder sleeve water cavity A or cylinder sleeve water cavity A and cylinder block water cavity D or cylinder cap water cavity B and vent valve water cavity C be carried out waterproof test respectively.
Prior art is used for the waterproof test device of block jacket and cylinder sleeve water jacket, is in fixing Production Regional, to operate, and the water tank that contains test water is fixed on melt pit or the ground, is connected firmly with tested diesel engine through a large amount of pipelines.Use this pick-up unit to carry out waterproof test; Need earlier with place, diesel engine handling auto levelizer to be detected place; Connecting line is installed again, is used driving pump that the water in the water tank is extracted in the water jacket cavity subsequently, and use supercharge pump to carry out supercharging to reach test pressure until hydraulic pressure; Pressure accumulation is after a period of time, leak situation and judge the watertightness performance result of visual inspection water jacket; Close accumulator valve after detecting end, make the current in the water jacket get back to water tank, remove connecting line afterwards, mounting platform is returned in diesel engine handling to be detected.
Use this fixed pick-up unit to exist following shortcoming:
1, diesel engine to be detected need come and go twice handling; Because the bulky heaviness of large-scale marine low speed diesel engine; Each handling all need be used large lifting equipment, thereby has increased the manual work amount, causes plant factor and efficiency low; When production is busy, can incur loss through delay manufacturing schedule because of waiting for driving;
2, this pick-up unit adopts gravity to drain backwater naturally; Therefore be difficult to the water in the pipeline has all been put, dismantle connecting line at every turn after, the surplus water in water cavity and the pipeline all can trickle on product to be detected and ground; This can cause the pollution of pilot region on the one hand; Increase extra cleaning work, can cause product to be detected to get rusty on the other hand, influence the quality of product;
3, this pick-up unit large tracts of land takies the work-yard, the utilization of area inefficiency;
4, for ease of personnel's operation, this pick-up unit needs to make in advance special-purpose operating platform, need arrange pipeline simultaneously, thereby manufacturing cost is expensive;
5, this pick-up unit adopts electrodynamic pump, can cause electric shock accidents in case cable is aging, therefore exists potential safety hazard.
The utility model content:
The utility model technical matters to be solved is the deficiency that overcomes existing marine low speed diesel engine block jacket and cylinder sleeve water jacket watertightness detection technique; A kind of cylinder of diesel engine water sleeve cylinder sleeve water jacket watertightness pick-up unit is provided; Adopt portable tank and portable power unit to constitute pick-up unit; Move in face of the diesel engine to be detected; Carry out waterproof test at the manufacturing scene, change the watertightness detection method of traditional diesel engine mobile to be detected, raise labour efficiency, reduce the purpose that the place took, improved the hoisting device utilization factor, improves working environment and reduction potential safety hazard thereby reach near pick-up unit.
Based on above-mentioned purpose, the technical scheme that the utility model is taked is following:
A kind of cylinder of diesel engine water sleeve cylinder sleeve water jacket watertightness pick-up unit; Comprise the water tank that the water source is provided and be used for power unit to diesel engine water filling to be detected and supercharging; Said water tank is installed in the go-cart with the castor that can move; And be connected with said power unit with return pipe through water injection pipe, this power unit bottom is equipped with the castor that can move, and is connected with compressed air source.
The described cylinder of diesel engine water sleeve of the utility model cylinder sleeve water jacket watertightness pick-up unit, its power unit is made up of test water route and power gas circuit; Said test water route comprises water intaking valve, driving pump, supercharge pump, water injection valve, branching block, some rapid-acting coupling, valve and back-water valve (BWV) draw water; Said water intaking valve, driving pump, water injection valve and branching block are connected from A-P ground successively; Said water intaking valve is communicated with said water tank through said water injection pipe; Be serially connected with water filter between this water intaking valve and the driving pump, said some rapid-acting couplings are connected in said branching block rear end side by side, and this branching block is provided with water pressure gauge; Said supercharge pump is connected in parallel on the driving pump; The said valve that draws water is connected in the rear end of this driving pump and is communicated with said water tank through said return pipe, and said back-water valve (BWV) one end is connected in said water injection valve rear end, and the other end is connected in said driving pump front end; Said power gas circuit comprises air filter device, driver's valve and pressure charging valve; Said air filter device front end is connected with compressed air source; Its rear end is connected with the front end of said driver's valve and pressure charging valve simultaneously; This driver's valve front end is provided with rain glass, and the rear end connects and drives said driving pump, and the rear end connection of this pressure charging valve also drives said supercharge pump; Said water injection pipe and return pipe are flexible pipe.
Compare with traditional watertightness pick-up unit, the described cylinder of diesel engine water sleeve of the utility model cylinder sleeve water jacket watertightness pick-up unit has advantage:
1, removable use; The place---said water tank and power unit all are equipped with the castor that can move in saving; Therefore a whole set of pick-up unit is movable to any place and operates, thereby has practiced thrift the place, has avoided the fixedly shortcoming of occupied ground of traditional watertightness detection method.
2, simplify processing step; Improve plant efficiency and efficiency---use said device can directly on the mounting platform of product to be detected, carry out watertightness and detect; Thereby heavy product to be detected only needs handling once; Reduced by a handling when using traditional watertightness detection method, reduced the hoisting operation amount, improved efficiency and plant factor.
3, power is simple, no potential safety hazard---and the utility model uses pressurized air as power, and power resources are simple, are particularly suitable for manufacturing enterprise, and the field work safe hidden danger of having avoided traditional electrification to cause as power source.
4, the corrosion product is cleaned, avoids in the operation place---when detecting off-test; The utility model is drawn back water tank through back-water valve (BWV) conversion with the water in the water cavity to be detected, so pipeline is when removing; No residual water flows out; Avoided classic method to cause draining unclean by the deadweight backwater, surplus water flows out the phenomenon of contaminated site when producing the pipeline dismounting, and the defective that product is got rusty.
Description of drawings:
Fig. 1 is the structural representation of marine low speed diesel engine dry type type cylinder jacket water jacket.
Fig. 2 is the structural representation of marine low speed diesel engine wet type type block jacket and cylinder sleeve water jacket.
Fig. 3 is the structural representation of the utility model.
Fig. 4 is the structural drawing of the utility model power unit.
Fig. 5 is that the pick-up unit of the utility model connects synoptic diagram.
Among the figure:
5-cylinder cap 6-vent valve 7-cylinder block 8-O RunddichtringO 9-water intaking valve
10-water filter 11-air filter device 12-reduction valve 13-safety valve 14-pressure charging valve
15-rain glass 16-driver's valve 17-supercharge pump 18-driving pump 19-water injection valve
The 20-valve 21-back-water valve (BWV) 22-water pressure gauge 23-branching block 24-rapid-acting coupling of drawing water
A-cylinder sleeve water cavity B-cylinder cap water cavity C-vent valve water cavity D-cylinder block water cavity
The W-water tank M-power unit F-air release S1-first aqueduct S2-second aqueduct
P1-return pipe P2-water injection pipe P3-air hose P4-first connects flexible pipe P5-second and connects flexible pipe
Embodiment:
Come the described cylinder of diesel engine water sleeve of the utility model cylinder sleeve water jacket watertightness pick-up unit is done further detailed description below in conjunction with accompanying drawing and specific embodiment, but can not limit the protection domain of the utility model with this.
See also Fig. 3, diagram cylinder of diesel engine water sleeve cylinder sleeve water jacket watertightness pick-up unit comprises water tank W and power unit M.Said water tank W is that the watertightness detection provides the water source, and it is installed in the go-cart with the castor that can move.Said power unit M is used for water cavity water filling and the supercharging to diesel engine to be detected, and its underpart also is equipped with the castor that can move, and whole like this watertightness pick-up unit just can move to nearby testing conveniently to carry out the watertightness detection of diesel engine to be detected.Said water tank W is connected with said power unit M with return pipe P1 through water injection pipe P2, and this water injection pipe P2 and return pipe P1 are flexible water conduit.This power unit M is connected with compressed air source through air hose P3, and is connected with the water cavity of diesel engine to be detected through the first connection flexible pipe P4.
See also Fig. 4 again, said power unit M is made up of test water route and power gas circuit.
Said test water route is in order to carry test water, and it comprises water intaking valve 9, driving pump 18, supercharge pump 17, water injection valve 19, branching block 23, some rapid-acting coupling 24, valve 20 and back-water valve (BWV) 21 draw water.Said water intaking valve 9, driving pump 18, water injection valve 19 are connected from A-P ground water pipe successively with branching block 23; Said water intaking valve 9 connects water inlet, and is communicated with said water tank W through said water injection pipe P2; Be serially connected with water filter 10 between this water intaking valve 9 and the driving pump 18, so that test water is filtered; Said supercharge pump 17 is connected in parallel on the driving pump 18, in order to water cavity supercharging to be detected; Said some rapid-acting coupling 24 is connected in the rear end of said branching block 23 side by side, and is connected with the water cavity of diesel engine to be detected through the first connection flexible pipe P4, and this branching block 23 is provided with water pressure gauge 22; The said valve 20 that draws water is connected in the rear end of this driving pump 18, and is communicated with said water tank W through said return pipe P1; Said back-water valve (BWV) 21 1 ends are connected in the rear end of said water injection valve 19, and the other end is connected in the front end of said driving pump 18.When opening said water intaking valve 9 and close said back-water valve (BWV) 21 simultaneously and draw water valve 20 with water injection valve 19, said water intaking valve 9, water filter 10, driving pump 18 and supercharge pump 17, water injection valve 19, branching block 23 and rapid-acting coupling 24 constitute the water route of water filling and supercharging in water cavity to be detected; When closing said water intaking valve 9 when opening said back-water valve (BWV) 21 simultaneously and drawing water valve 20 with water injection valve 19, said rapid-acting coupling 24, branching block 23, back-water valve (BWV) 21, driving pump 18 and the valve 20 that draws water constitute by water cavity to be detected to water route that water tank W draws water.
Said cylinder of diesel engine water sleeve cylinder sleeve water jacket watertightness pick-up unit uses pressurized air as power, and said power gas circuit comprises air filter device 11, safety valve 13, reduction valve 12, driver's valve 16 and pressure charging valve 14.Said air filter device 11 front ends connect the drive air inlet; And be connected with compressed air source through air hose P3; These air filter device 11 rear ends are connected with the front end of said driver's valve 16 through safety valve 13, reduction valve 12 successively; Simultaneously its rear end is connected with the front end of said pressure charging valve 14 through safety valve 13, after this reduction valve 12, the front end of driver's valve 16 is provided with rain glass 15; The rear end of said driver's valve 16 connects said driving pump 18 and can drive this driving pump 18, and the rear end of said pressure charging valve 14 connects said supercharge pump 17 and can drive this supercharge pump 17.After pressurized air filtered through air filter device 11, the one tunnel through safety valve 13, reduction valve 12, rain glass 15, driver's valve 16 entering driving pumps 18, as the power of driving pump 18; Another road gets into supercharge pump 17 through safety valve 13, pressure charging valve 14, as the power of supercharge pump 17.
Below in conjunction with an embodiment application process of the utility model is done an explanation.
See also Fig. 3, present embodiment the product that will detect simultaneously be two cylinder of diesel engine cylinder caps 5.Cylinder cap 5 constitutes cylinder cap water cavity B with cylinder cap water jacket 4 among the figure, and cylinder cap 5 constitutes vent valve water cavity C with vent valve 6, and cylinder cap water cavity B couples together through inner inclined tube of cylinder cap and vent valve water cavity C, thereby constitutes a whole water cavity.
The concrete operations step that detects is following:
1, water cavity to be detected on the connection diesel engine is installed.
Cooling pipe orifice is installed the first aqueduct S1 and the second aqueduct S2 on the cylinder cap water jacket 4 of two cylinders; The first aqueduct S1 of first cylinder is used to connect first and connects flexible pipe P4, and the second aqueduct S2 of second cylinder is used to seal the last cooling pipe orifice of cylinder cap water jacket 4; Connect flexible pipe P5 through second between two cylinder caps 5 and couple together, thereby connect into the water cavity of two cylinder caps 5 as a whole.Air release F is installed at coolant outlet place at each cylinder cap 5, discharges the air in the water cavity during in order to water filling.
2, move also installation and measuring device.
The water tank W and the power unit M of said pick-up unit are moved to cylinder of diesel engine cylinder cap to be detected 5 next doors, and this water tank W and power unit M are coupled together with water injection pipe P2 and return pipe P1.Connect flexible pipe P4 with first water cavity to be detected is connected with the test water route of said power unit M, promptly first connects the first aqueduct S1 that flexible pipe P4 one end connects first cylinder, and the other end connects the rapid-acting coupling 24 in test water route.The power gas circuit of power unit is connected with compressed air source, and promptly air hose P3 one end connects the drive air inlet of power unit, and the other end is connected with compressed air source, and the working pressure range of adjustment source of the gas air pressure to driver's valve 16.In said water tank W, fill with test water then, and add a certain amount of corrosion inhibiter, prevent that water cavity to be detected from getting rusty according to ratio.The connection status of whole detection system connects synoptic diagram referring to the pick-up unit of Fig. 5 the utility model.
3, water filling in water cavity to be detected.
Open the water intaking valve 9 and water injection valve 19 of said power unit, close said back-water valve (BWV) 21 and draw water valve 20, open driver's valve 16 and start driving pump 18 fills with water in water cavity to be detected, after low amounts of water flows out in air release F, close air release F.
4, give water cavity supercharging to be detected.
Open pressure charging valve 14 to start supercharge pump 17, the water in the water cavity to be detected is boosted, observe water pressure gauge 22, hydraulic pressure rises to 7bar in water cavity to be detected, closes water injection valve 19, water intaking valve 9, driving pump 18 and supercharge pump 17 then.
5, testing product watertightness performance.
The appearance of visual inspection diesel engine sealing to be detected position seam crossing judges whether its watertightness performance is qualified: if occur leaking, show that then watertightness is defective; Leak like nothing, show that then watertightness is qualified.
6, the water cavity to be detected of finding time, detection of end.
Open back-water valve (BWV) 21 and draw water valve 20, open driver's valve 16 and to start driving pump 18 water in the water cavity to be detected is drawn back water tank W, detection of end is also removed said pick-up unit.
The utlity model has the test duration short, simple to operate, floor area is little, removable use, backwater convenient, the place does not have advantages such as ponding.
Said embodiment is not the practical range that is used for limiting the utility model; The protection domain that the utility model requires is not limited only to the foregoing description; Should comprise that also other are to conspicuous conversion of this utility model and replacement scheme; All equivalences of making according to the content of the utility model patent claim change and revise, and all belong to the category of the utility model.
Claims (5)
1. cylinder of diesel engine water sleeve cylinder sleeve water jacket watertightness pick-up unit; Comprise the water tank that the water source is provided and be used for power unit to diesel engine water filling to be detected and supercharging; It is characterized in that: said water tank is installed in the go-cart with the castor that can move; And be connected with said power unit with return pipe through water injection pipe, this power unit bottom is equipped with the castor that can move, and is connected with compressed air source.
2. cylinder of diesel engine water sleeve cylinder sleeve water jacket watertightness pick-up unit according to claim 1 is characterized in that: said power unit is made up of test water route and power gas circuit; Said test water route comprises water intaking valve, driving pump, supercharge pump, water injection valve, branching block, some rapid-acting coupling, valve and back-water valve (BWV) draw water; Said water intaking valve, driving pump, water injection valve and branching block are connected from A-P ground successively; Said water intaking valve is communicated with said water tank through said water injection pipe; Said some rapid-acting coupling is connected in said branching block rear end side by side, and said supercharge pump is connected in parallel on the driving pump, and the said valve that draws water is connected in the rear end of this driving pump and is communicated with said water tank through said return pipe; Said back-water valve (BWV) one end is connected in said water injection valve rear end, and the other end is connected in said driving pump front end; Said power gas circuit comprises air filter device, driver's valve and pressure charging valve; Said air filter device front end is connected with compressed air source; Its rear end is connected with the front end of said driver's valve and pressure charging valve simultaneously; The rear end of this driver's valve connects and drives said driving pump, and the rear end connection of this pressure charging valve also drives said supercharge pump.
3. cylinder of diesel engine water sleeve cylinder sleeve water jacket watertightness pick-up unit according to claim 2 is characterized in that: be serially connected with water filter between the water intaking valve in said test water route and the driving pump.
4. cylinder of diesel engine water sleeve cylinder sleeve water jacket watertightness pick-up unit according to claim 2, it is characterized in that: the branching block in said test water route is provided with water pressure gauge, and the driver's valve front end of said power gas circuit is provided with rain glass.
5. cylinder of diesel engine water sleeve cylinder sleeve water jacket watertightness pick-up unit according to claim 1 and 2, it is characterized in that: said water injection pipe and return pipe are flexible pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203272828U CN202229887U (en) | 2011-09-02 | 2011-09-02 | Water tightness detection device for diesel engine cylinder block water jacket and cylinder sleeve water jacket |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203272828U CN202229887U (en) | 2011-09-02 | 2011-09-02 | Water tightness detection device for diesel engine cylinder block water jacket and cylinder sleeve water jacket |
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| Publication Number | Publication Date |
|---|---|
| CN202229887U true CN202229887U (en) | 2012-05-23 |
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ID=46080471
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203272828U Withdrawn - After Issue CN202229887U (en) | 2011-09-02 | 2011-09-02 | Water tightness detection device for diesel engine cylinder block water jacket and cylinder sleeve water jacket |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202229887U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102435396A (en) * | 2011-09-02 | 2012-05-02 | 上海中船三井造船柴油机有限公司 | Water jacket of cylinder block of diesel engine as well as watertightness detection device and method of water jacket of cylinder block |
| CN102901606A (en) * | 2012-10-12 | 2013-01-30 | 宁波钢铁有限公司 | On-board hydrostatic test water inlet joint tool for cylinder sleeve and cylinder head assembly of internal-combustion engine of locomotive |
| CN114544092A (en) * | 2022-01-12 | 2022-05-27 | 江西一舟数据技术有限公司 | Preparation process of logistics equipment |
-
2011
- 2011-09-02 CN CN2011203272828U patent/CN202229887U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102435396A (en) * | 2011-09-02 | 2012-05-02 | 上海中船三井造船柴油机有限公司 | Water jacket of cylinder block of diesel engine as well as watertightness detection device and method of water jacket of cylinder block |
| CN102435396B (en) * | 2011-09-02 | 2013-12-25 | 上海中船三井造船柴油机有限公司 | Water jacket of cylinder block of diesel engine as well as watertightness detection device and method of water jacket of cylinder block |
| CN102901606A (en) * | 2012-10-12 | 2013-01-30 | 宁波钢铁有限公司 | On-board hydrostatic test water inlet joint tool for cylinder sleeve and cylinder head assembly of internal-combustion engine of locomotive |
| CN114544092A (en) * | 2022-01-12 | 2022-05-27 | 江西一舟数据技术有限公司 | Preparation process of logistics equipment |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20120523 Effective date of abandoning: 20131225 |
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| RGAV | Abandon patent right to avoid regrant |