CN103790892A - Single-action and multi-stage plunger type hydraulic cylinder with controllable extending and retracting sequence - Google Patents
Single-action and multi-stage plunger type hydraulic cylinder with controllable extending and retracting sequence Download PDFInfo
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- CN103790892A CN103790892A CN201410027844.5A CN201410027844A CN103790892A CN 103790892 A CN103790892 A CN 103790892A CN 201410027844 A CN201410027844 A CN 201410027844A CN 103790892 A CN103790892 A CN 103790892A
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Abstract
The invention discloses a single-action and multi-stage plunger type hydraulic cylinder with a controllable extending and retracting sequence. The single-action and multi-stage plunger type hydraulic cylinder comprises a cylinder barrel (1), a first-stage piston rod (2), an innermost-stage piston rod (4), seal assemblies, supporting rings, shaft limit keys, hole limit keys and a rear cover (16). The hydraulic cylinder is characterized in that a one-way seal cartridge assembly (19) is arranged at one end of the innermost-stage piston rod (4), and the other end of the innermost-stage piston rod (4) is connected with a first-stage load disc (8). One end of a piston rod outside the innermost-stage piston rod (4) is connected with a middle-stage load disc (9), and the one-way seal cartridge assembly (19) comprises a one-way seal cartridge (19-3) and a second one-way valve (19-2). A first-stage one-way valve opening plunger assembly (17) is arranged in the rear cover (16) and comprises a first-stage plunger (17-2), an oil opening (17-1), a channel (17-5), a first reversing one-way valve (17-3) and a first-stage ejector pin (17-4). The single-action and multi-stage plunger type hydraulic cylinder is simple in structure, practical and controllable in extending and retracting sequence, and the requirement for the extending and retracting sequence of all stages of piston rods of the hydraulic cylinder is met for customers.
Description
Technical field:
The present invention relates to a kind of Multi-stage plunger formula oil hydraulic cylinder, relate in particular to the controlled single-acting Multi-stage plunger formula oil hydraulic cylinder of a kind of flexible order.
Background technique:
At present, existing single-acting Multi-stage plunger formula oil hydraulic cylinder sequence of movement is: piston rod stretches out order and stretches out successively according to the cross section of piston rod is descending, when retraction, retract successively according to the size in piston rod cross section is ascending, this order is to determine according to the pressure in oil hydraulic cylinder and lifting surface area.Under some application-specific operating modes, every one-level piston rod of Multi-stage cylinder connects different loads, sequence of movement between each load need to be carried out work according to the sequence of movement contrary with conventional oil hydraulic cylinder, existing single-acting Multi-stage plunger formula oil hydraulic cylinder cannot meet the need, and now just needs a kind of oil hydraulic cylinder of new structure to meet this demand.
Summary of the invention
The object of the invention is to overcome the deficiency of above-mentioned prior art and provide a kind of simple and practical, flexible order is controlled, meets the controlled single-acting Multi-stage plunger formula oil hydraulic cylinder of flexible order to oil hydraulic cylinder piston rods at different levels stretch out, retraction order has the customer demand of requirement.
Object of the present invention can reach by following measure: the single-acting Multi-stage plunger formula oil hydraulic cylinder that a kind of flexible order is controlled, and it comprises cylinder barrel, is provided with first stage piston bar in cylinder barrel, is provided with interior level piston rod, between cylinder barrel and first stage piston bar in first stage piston bar, between first stage piston bar and interior level piston rod, be equipped with seal assembly, support ring, axle positive stop key, hole positive stop key, in cylinder barrel, the rear end of first stage piston bar is provided with bonnet, the one end that it is characterized in that interior level piston rod is provided with one-way sealing grip assembly, the other end of interior level piston rod connects one-level loading disk, one end of piston rod outside interior level piston rod connects intergrade loading disk, and one-way sealing grip assembly comprises one-way sealing big envelope, the second one-way valve, one-way sealing puts and is provided with the second one-way valve, is provided with one-level one-way valve opening plunger assembly in bonnet, and one-level one-way valve opening plunger assembly comprises one-level plunger, hydraulic fluid port, passage, the first reverse one-way valve, one-level thimble, is provided with hydraulic fluid port in one-level plunger, passage, hydraulic fluid port and passage communicate, and one-level plunger is provided with the first reverse one-way valve, one-level thimble.
In order further to realize object of the present invention, between described first stage piston bar and interior level piston rod, be provided with at least one-level intergrade piston rod, between first stage piston bar and the intergrade piston rod that is attached thereto, between intergrade piston rod, and be equipped with seal assembly between interior level piston rod and the intergrade piston rod that is attached thereto, support ring, axle positive stop key, hole positive stop key, one end of intergrade piston rod is provided with intergrade one-way valve opening plunger assembly, intergrade one-way valve opening plunger assembly comprises intergrade plunger, the second reverse one-way valve, the first one-way valve, intergrade thimble, intergrade plunger is provided with the second reverse one-way valve, intergrade seal ring, intergrade thimble, in intergrade plunger, be provided with the first one-way valve.
Compared with the prior art the present invention can produce following good effect: the working state of the present invention and conventional single-acting multistage hydraulic cylinder (piston rod stretches out, retraction order) is just in time contrary.The present invention by Multi-stage plunger formula oil hydraulic cylinder inner increase multichannel one-way valve and piston structure oil circuit control trend can control piston bar at different levels stretch out, retraction order, when control piston bar stretches out according to stretching out successively from small to large, when retraction, retract successively from big to small according to diameter of piston rod, the sequence of movement that can be applicable to the piston rod to oil hydraulic cylinder has in the specific occasion of specific (special) requirements.
Accompanying drawing explanation:
Fig. 1 is the structural representation of one embodiment of the present invention:
Fig. 2 is the partial enlarged drawing of Fig. 1;
Fig. 3 is the structural representation of one-level one-way valve opening plunger assembly of the present invention;
Fig. 4 is the structural representation of intergrade one-way valve opening plunger assembly of the present invention;
Fig. 5 is the structural representation of one-way sealing grip assembly of the present invention;
Fig. 6 is the structural representation of another embodiment of the present invention:
Fig. 7 is the partial enlarged drawing of Fig. 6.
Embodiment: the specific embodiment of the present invention is elaborated below in conjunction with accompanying drawing:
Embodiment 1: the single-acting Multi-stage plunger formula oil hydraulic cylinder (referring to Fig. 1-Fig. 2) that a kind of flexible order is controlled, the present embodiment is take three grades as example, it comprises cylinder barrel 1, in cylinder barrel 1, be provided with first stage piston bar 2, in first stage piston bar 2, be provided with intergrade piston rod 3, in intergrade piston rod 3, be provided with interior level piston rod 4, between cylinder barrel 1 and first stage piston bar 2, be provided with primary seal assembly parts 5, one-level support ring 22, positive stop key 13 for first grade axis, positive stop key 10 for one-level hole, between first stage piston bar 2 and intergrade piston rod 3, be provided with intergrade seal assembly 6, intergrade support ring 21, intergrade positive stop key 14 for axle, positive stop key 11 for intergrade hole, between intergrade piston rod 3 and interior level piston rod 4, be provided with interior level seal assembly 7, interior level support ring 20, interior level positive stop key 15 for axle, interior level positive stop key 12 for hole, the rear end of the interior first stage piston bar 2 of cylinder barrel 1 is provided with bonnet 16, one end of the interior intergrade piston rod 3 of first stage piston bar 2 is provided with intergrade one-way valve opening plunger assembly 18, intergrade piston rod 3 the other ends connect intergrade loading disk 9, intergrade one-way valve opening plunger assembly 18 comprises intergrade plunger 18-2 referring to Fig. 4, the second reverse one-way valve 18-3, the first one-way valve 18-4, intergrade thimble 18-5, intergrade plunger 18-2 is provided with the second reverse one-way valve 18-3, intergrade seal ring 18-6, intergrade thimble 18-5, in intergrade plunger 18-2, be provided with the first one-way valve 18-4.One end of interior level piston rod 4 in intergrade piston rod 3 is provided with one-way sealing grip assembly 19, the other end of interior level piston rod 4 connects one-level loading disk 8, one-way sealing grip assembly 19 comprises one-way sealing big envelope 19-3, the second one-way valve 19-2 referring to Fig. 5, and one-way sealing big envelope 19-3 is provided with the second one-way valve 19-2.In bonnet 16, be provided with one-level one-way valve opening plunger assembly 17, one-level one-way valve opening plunger assembly 17 comprises one-level plunger 17-2, hydraulic fluid port 17-1, passage 17-5, the first reverse one-way valve 17-3, one-level thimble 17-4 referring to Fig. 3, in one-level plunger 17-2, be provided with hydraulic fluid port 17-1, passage 17-5, hydraulic fluid port 17-1 and passage 17-5 communicate, and one-level plunger 17-2 is provided with the first reverse one-way valve 17-3, primary seal circle 17-6, one-level thimble 17-4.Bonnet 16, between first stage piston bar 2 and intergrade one-way valve opening plunger assembly 18, form the 6th oil pocket 28, intergrade one-way valve opening plunger assembly 18, between intergrade piston rod 3 and one-way sealing grip assembly 19, form the 5th oil pocket 27, between intergrade one-way valve opening plunger assembly 18 and one-level one-way valve opening plunger assembly 17, form the first oil pocket 23, between the intergrade plunger 18-2 of intergrade one-way valve opening plunger assembly 18 and thimble 18-5, form the second oil pocket 24, between intergrade thimble 18-5 and one-way sealing grip assembly 19, form the 3rd oil pocket 25, the interior formation of interior level piston rod 4 the 4th oil pocket 26.Between the first oil pocket 23 and the second oil pocket 24, be provided with the first one-way valve 18-4, between the 3rd oil pocket 25 and the 4th oil pocket 26, be provided with the second one-way valve 19-2, between passage 17-5 and the 6th oil pocket 28, be provided with the first reverse one-way valve 17-3, between the 5th oil pocket 27 and the first oil pocket 23, be provided with the second reverse one-way valve 18-3.
Specific works process is as follows:
Stretch out process: hydraulic system fuel feeding enters hydraulic fluid port 17-1, hydraulic oil approach passage 17-5 enters the first oil pocket 23, enter the second oil pocket 24 through the first one-way valve 18-4 again, the second oil pocket 24 communicates with the 3rd oil pocket 25, fluid is after the 3rd oil pocket 25, last approach the second one-way valve 19-2 enters the 4th oil pocket 26, interior level piston rod 4(smallest shaft diameter) start to stretch out.After interior level piston rod stretches out completely, fluid cannot enter oil pocket 26 again, oil pressure starts to raise, the second oil pocket 24, the 3rd oil pocket 25 reach certain pressure, one-way sealing grip assembly 19 and intergrade one-way valve opening plunger assembly 18 Quick releases, fluid enters the 5th oil pocket 27, and then intergrade piston rod 3 starts to stretch out with one-way sealing grip assembly 19.Close at disengagement moment second one-way valve 19-2, the 4th oil pocket 26 is blocked simultaneously, avoids interior level piston rod 4 to fall after rise.After intergrade piston rod 3 stretches out completely, fluid cannot enter the 5th oil pocket 27, oil pressure starts to raise again, and higher than former pressure, pressure in the first oil pocket 23 reaches certain limit intergrade one-way valve opening plunger assembly 18 and is separated from fast with one-level one-way valve opening plunger assembly 17, fluid enters the 6th oil pocket 28, and under the effect of oil pressure, first stage piston bar 2 starts to stretch out with intergrade one-way valve opening plunger assembly 18.Close at disengagement moment first one-way valve 18-4, the 5th oil pocket 27, by the first one-way valve 18-4 shutoff, avoids intergrade piston rod 3 to fall after rise simultaneously.After first stage piston bar 2 stretches out completely, the process of stretching out of this Multi-stage cylinder finishes, and stretches out order and stretches out successively for piston rod is ascending.
Retraction process: adjust system is to retraction program, now hydraulic fluid port 17-1 pressure is zero substantially, under the effect of lifting load, first stage piston bar 2 start slowly to retract (because the first one-way valve 18-4, the second one-way valve 19-2 in one-way sealing grip assembly 19 in intergrade one-way valve opening plunger assembly 18 are all now closed conditions, so intergrade, interior level piston rod now cannot be retracted).Retract to (when the seal ring 17-6 of one-level one-way valve opening plunger assembly 17 has just entered the inner chamber of intergrade one-way valve opening plunger assembly 18) while approaching bonnet 16 until first stage piston bar 2, now the hydraulic oil in the 6th oil pocket 28 cannot enter the first oil pocket 23 and be back to passage 17-5, produce entrap phenomenon, now the first reverse one-way valve 17-3 is unlocked, pocketed oil in the 6th oil pocket 28 is back to passage 17-5 and then gets back to fuel tank through the first reverse one-way valve 17-3, and first stage piston bar 2 slowly retracts to the end and plays buffer function like this.Retracting to one-level thimble 17-4 in the process at the end with intergrade one-way valve opening plunger assembly 18 at first stage piston bar 2 opens the first one-way valve 18-4, the hydraulic oil of such the 5th oil pocket 27 is the first one-way valve 18-4 inlet passage 17-5 oil sump tank through being unlocked just, and intergrade piston rod 3 starts to retract.Intergrade piston rod 3 also can experience the pocketed oil problem producing in first stage piston bar retraction process in the process that retracts to the end, the second reverse one-way valve 18-3 head it off for intergrade piston rod, in the time that intergrade piston rod 3 retracts to the ending at the end, intergrade thimble 18-5 in intergrade one-way valve opening plunger assembly 18 opens the second one-way valve 19-2 simultaneously, and interior like this level piston rod 4 just can have been retracted smoothly.An operation cycle finishes.
Embodiment 2: the controlled single-acting Multi-stage plunger formula oil hydraulic cylinder of a kind of flexible order is (referring to figure, 6-Fig. 7), the present embodiment is take two-stage as example, its structure and principle are substantially with embodiment 1, its difference is that it has removed intergrade piston rod 3, intergrade seal assembly 6, intergrade support ring 21, intergrade positive stop key 14 for axle, positive stop key 11 and intergrade one-way valve opening plunger assembly 18 for intergrade hole, wherein intergrade one-way valve opening plunger assembly 18 comprises intergrade plunger 18-2, the second reverse one-way valve 18-3, the first one-way valve 18-4, intergrade thimble 18-5.One end of first stage piston bar 2 connects intergrade loading disk 9, between bonnet 16, first stage piston bar 2 and one-way sealing grip assembly 19, forms oil pocket 29, and one-level one-way valve opening plunger assembly 17 and one-way sealing grip assembly 19 form oil pocket 30.
Specific works process is as follows: stretch out process: hydraulic system fuel feeding enters hydraulic fluid port 17-1, and hydraulic oil approach passage 17-5 enters oil pocket 30, and approach the second one-way valve 19-2 enters the 4th oil pocket 26, interior level piston rod 4(smallest shaft diameter) start to stretch out.After interior level piston rod stretches out completely, fluid cannot enter oil pocket 26 again, oil pressure starts to raise, oil pocket 30, reach certain pressure, one-way sealing grip assembly 19 and one-level one-way valve opening plunger assembly 17 Quick releases, fluid enters oil pocket 29, and then first stage piston bar 2 starts to stretch out with one-way sealing grip assembly 19.Close at disengagement moment second one-way valve 19-2, the 4th oil pocket 26 is blocked simultaneously, avoids interior level piston rod 4 to fall after rise.After first stage piston bar 2 stretches out completely, the process of stretching out of this Multi-stage cylinder finishes, and stretches out order and stretches out successively for piston rod is ascending.Retraction process: adjust system is to retraction program, now hydraulic fluid port 17-1 pressure is zero substantially, under the effect of lifting load, first stage piston bar 2 start slowly to retract (because the second one-way valve 19-2 in one-way sealing grip assembly 19 is now closed condition, so interior level piston rod now cannot be retracted).Retract to (when the seal ring 17-6 of one-level one-way valve opening plunger assembly 17 has just entered the inner chamber of one-way sealing grip assembly 19) while approaching bonnet 16 until first stage piston bar 2, now the hydraulic oil in oil pocket 29 cannot enter oil pocket 30 and be back to passage 17-5, produce entrap phenomenon, now the second one-way valve 19-2 is unlocked, pocketed oil in oil pocket 29 is back to passage 17-5 and then gets back to fuel tank through the second one-way valve 19-2, and first stage piston bar 2 slowly retracts to the end and plays buffer function like this.Retracting to one-level thimble 17-4 in the process at the end with one-way sealing grip assembly 19 at first stage piston bar 2 opens the second reverse one-way valve 18-3, the hydraulic oil of such the 4th oil pocket 26 is the second reverse one-way valve 18-3 inlet passage 17-5 oil sump tank through being unlocked just, and interior like this level piston rod 4 just can have been retracted smoothly.An operation cycle finishes.
Above embodiment is described the preferred embodiment of the present invention; not scope of the present invention is limited; design under the prerequisite of spirit not departing from the present invention; various distortion and improvement that the common engineers and technicians in related domain make technological scheme of the present invention, all should fall in the definite protection domain of claims of the present invention.
Claims (2)
1. the controlled single-acting Multi-stage plunger formula oil hydraulic cylinder of flexible order, it comprises cylinder barrel (1), in cylinder barrel (1), be provided with first stage piston bar (2), in first stage piston bar (2), be provided with interior level piston rod (4), between cylinder barrel (1) and first stage piston bar (2), between first stage piston bar (2) and interior level piston rod (4), be equipped with seal assembly, support ring, axle positive stop key, hole positive stop key, the rear end of the interior first stage piston bar of cylinder barrel (1) (2) is provided with bonnet (16), the one end that it is characterized in that interior level piston rod (4) is provided with one-way sealing grip assembly (19), the other end of interior level piston rod (4) connects one-level loading disk (8), one end of piston rod outside interior level piston rod (4) connects intergrade loading disk (9), one-way sealing grip assembly (19) comprises one-way sealing big envelope (19-3), the second one-way valve (19-2), one-way sealing big envelope (19-3) is provided with the second one-way valve (19-2), in bonnet (16), be provided with one-level one-way valve opening plunger assembly (17), one-level one-way valve opening plunger assembly (17) comprises one-level plunger (17-2), hydraulic fluid port (17-1), passage (17-5), the first reverse one-way valve (17-3), one-level thimble (17-4), in one-level plunger (17-2), be provided with hydraulic fluid port (17-1), passage (17-5), hydraulic fluid port (17-1) and passage (17-5) communicate, one-level plunger (17-2) is provided with the first reverse one-way valve (17-3), one-level thimble (17-4).
2. the controlled single-acting Multi-stage plunger formula oil hydraulic cylinder of a kind of flexible order according to claim 1, it is characterized in that being provided with at least one-level intergrade piston rod (3) between described first stage piston bar (2) and interior level piston rod (4), between first stage piston bar (2) and the intergrade piston rod (3) that is attached thereto, between intergrade piston rod (3), and be equipped with seal assembly between interior level piston rod (4) and the intergrade piston rod (3) that is attached thereto, support ring, axle positive stop key, hole positive stop key, one end of intergrade piston rod (3) is provided with intergrade one-way valve opening plunger assembly (18), intergrade one-way valve opening plunger assembly (18) comprises intergrade plunger (18-2), the second reverse one-way valve (18-3), the first one-way valve (18-4), intergrade thimble (18-5), intergrade plunger (18-2) is provided with the second reverse one-way valve (18-3), intergrade seal ring (18-6), intergrade thimble (18-5), in intergrade plunger (18-2), be provided with the first one-way valve (18-4).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410027844.5A CN103790892B (en) | 2014-01-22 | 2014-01-22 | The single-acting multistage column plug oil hydraulic cylinder that a kind of flexible order is controlled |
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| CN201410027844.5A CN103790892B (en) | 2014-01-22 | 2014-01-22 | The single-acting multistage column plug oil hydraulic cylinder that a kind of flexible order is controlled |
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| CN103790892A true CN103790892A (en) | 2014-05-14 |
| CN103790892B CN103790892B (en) | 2015-11-18 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105715613A (en) * | 2014-12-04 | 2016-06-29 | 中联重科股份有限公司 | Multi-stage oil cylinder |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6155404A (en) * | 1984-08-28 | 1986-03-19 | Fujitsu Ltd | Air-cylinder |
| FR2711398A1 (en) * | 1993-10-18 | 1995-04-28 | Bourgeois Alain | Telescopic ram with simultaneous extension |
| CN202082188U (en) * | 2011-05-18 | 2011-12-21 | 四川海搏液压机械有限公司 | Single-action telescopic sleeve cylinder |
| CN202900830U (en) * | 2012-09-21 | 2013-04-24 | 张海平 | Sequence hydraulic cylinder |
| CN203670349U (en) * | 2014-01-22 | 2014-06-25 | 烟台未来自动装备有限责任公司 | Single-action multi-stage plunger type hydraulic cylinder with controllable stretching sequence |
-
2014
- 2014-01-22 CN CN201410027844.5A patent/CN103790892B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6155404A (en) * | 1984-08-28 | 1986-03-19 | Fujitsu Ltd | Air-cylinder |
| FR2711398A1 (en) * | 1993-10-18 | 1995-04-28 | Bourgeois Alain | Telescopic ram with simultaneous extension |
| CN202082188U (en) * | 2011-05-18 | 2011-12-21 | 四川海搏液压机械有限公司 | Single-action telescopic sleeve cylinder |
| CN202900830U (en) * | 2012-09-21 | 2013-04-24 | 张海平 | Sequence hydraulic cylinder |
| CN203670349U (en) * | 2014-01-22 | 2014-06-25 | 烟台未来自动装备有限责任公司 | Single-action multi-stage plunger type hydraulic cylinder with controllable stretching sequence |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105715613A (en) * | 2014-12-04 | 2016-06-29 | 中联重科股份有限公司 | Multi-stage oil cylinder |
| CN105715613B (en) * | 2014-12-04 | 2017-09-26 | 中联重科股份有限公司 | Multi-stage oil cylinder |
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| CN103790892B (en) | 2015-11-18 |
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Inventor after: Meng Lingying Inventor after: Wang Shusheng Inventor after: Ma Longpeng Inventor after: Cao Changzhen Inventor after: Lin Zhihai Inventor after: Ding Chunlei Inventor after: Pang Dawei Inventor after: Guo Dunpeng Inventor before: Wang Shusheng Inventor before: Meng Lingying Inventor before: Ma Longpeng Inventor before: Cao Changzhen Inventor before: Lin Zhihai Inventor before: Ding Chunlei Inventor before: Pang Dawei Inventor before: Guo Dunpeng |
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Free format text: CORRECT: INVENTOR; FROM: WANG SHUSHENG MENG LINGYING MA LONGPENG CAO CHANGZHEN LIN ZHIHAI DING CHUNLEI PANG DAWEI GUO DUNPENG TO: MENG LINGYING WANG SHUSHENG MA LONGPENG CAO CHANGZHEN LIN ZHIHAI DING CHUNLEI PANG DAWEI GUO DUNPENG |
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Denomination of invention: A single acting multi-stage plunger hydraulic cylinder with controllable telescopic sequence Effective date of registration: 20230904 Granted publication date: 20151118 Pledgee: Yantai Branch of China Merchants Bank Co.,Ltd. Pledgor: YANTAI FUTURE AUTOMATIC EQUIPMENTS Co.,Ltd. Registration number: Y2023980055089 |
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