CN86104051A - Hydraulic operating mechanism - Google Patents
Hydraulic operating mechanism Download PDFInfo
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- CN86104051A CN86104051A CN86104051.1A CN86104051A CN86104051A CN 86104051 A CN86104051 A CN 86104051A CN 86104051 A CN86104051 A CN 86104051A CN 86104051 A CN86104051 A CN 86104051A
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Abstract
A kind of hydraulic operating mechanism, wherein stepped piston is as driver part, and wherein stepped piston is to be driven by the high-pressure liquid that is applied on the big piston face by a hydraulic control, and high-pressure liquid is applied on the small piston face all the time.The structure of hydraulic operating mechanism is to arrange like this, when differential piston is parked in its answer position, high-pressure liquid acts on two piston areas simultaneously, is applied to the thrust that two power differences on the piston area are produced, and the holding mechanism that is applied on stepped piston or its extension part grips.In a single day the gripping force of holding mechanism is removed, and stepped piston just moves forward; Act on the high-pressure liquid on the big piston face side in case remove, then this piston moves backward.
Description
The present invention relates to a hydraulic operating mechanism, be applicable to when receiving an operational order equipment with the high-speed driving load.
Air pressure is air pressure and hydraulic pressure oil pressure for example for example, all be used as the high-speed straight-line motion so far or the driving source of the equipment that rotatablely moves, and pneumatic operator is usually used in lighter load.
Yet, when heavy duty of operation, for example during the load of tuple ton, it is bigger that pneumatic operator will inevitably become, and when operation, owing to provide and discharged air, will inevitably produce very big noise, therefore, safeguard that in order to raise air pressure the cost of air compressor also will certainly increase, so the normal mostly hydraulic operating system that adopts.
Hydraulic operating mechanism is compared with pneumatic system, can obtain high pressure easily, this be since the fluid that uses have relative incompressibility so, so noise is low during operation, mechanism can make small-sized, the dawn can be made good reaction when high speed operation.
In hydraulic operating system, if air is sneaked in the hydraulic fluid in mechanism's assembly process, if perhaps air is dissolved in the fluid in fluid compression procedure, the reaction velocity that mechanism makes that will slow down of this air in the fluid so, and can not keep working time invariable yet.
An exemplary of this class high-speed mechanism is the switching mechanism that is used for electrical power transmission system.
When the capacity of electrical power transmission system and voltage increased, switch, particularly electric interrupter more needed to improve its characteristic.For this reason, not only use the gas-insulated contact maker, wherein adopted SF
6(sulphur hexafluoride) gas is as arc extinguishing medium, and hope improvement performance, improves the stability of system, for example improves switching speed, and it is poor to reduce switching time.In addition, also more and more require the minimizing maintenance issues of service time, for example improve the maintenance of mechanism, reduce generating noise.
Although the present invention is according to the narration of power switch operating device, the present invention also is applicable to the high speed operation mechanism that other are identical.
Fig. 1 schematically illustrates the conventional hydraulic operating device that is disclosed among the Japanese patent application publication No. No.57-111915, and wherein [101] are switch gears, as the chopper switch parts.Switch part [101] comprises fixed contact [102], and movable contact [103], and is driven by driving mechanism [104], with the closure or openness contact.Driving mechanism [104] comprises that one is connected to the stepped piston [106] of movable contact [103] with rod [105], and an oil hydraulic cylinder [107], stepped piston [106] are done liquid seal between them with Sealing [106a] in oil hydraulic cylinder [107].The conduit [108] that is connected the end face (limit, large-section) [107a] of [107] is connected to hydraulic control device [109], and hydraulic control device [109] is connected to low-pressure cabinet [110] by low-pressure tube [111].Accumulator [113] is the excellent side (small bore limit) [107b] that is connected to oil hydraulic cylinder [107] by passage [112], and high-pressure conduit [114] is connected to hydraulic control device [109] to accumulator [113].In addition, the pump-unit [115] of supplying with high-pressure liquid is set, so that be discharged into the interior fluid of low-pressure cabinet [110] by conduit [117] recovery.Another conduit [116] is used for providing high pressure by it to accumulator [113].
The operation of above-mentioned general mechanism will be discussed now.High-pressure liquid from accumulator [113] usually is to provide by the passage [112] on the excellent side [107a] of stepped piston [106].When the operational order of a unlatching switch part [101] offered hydraulic control device [109], the high-pressure liquid that offers the end face [107a] of stepped piston [106] by conduit [114] then was discharged in the low-pressure cabinet [110] by conduit [108] and [111].At this moment, conductive pipe [108] provides the passage of high-pressure liquid to close.Therefore, the high-pressure liquid on the excellent side [107b] of stepped piston [106] pushes stepped piston [106], opens switch part [101] as shown in Figure 1.At this state, be full of low-pressure fluid owing to comprise the end face [107a] of the stepped piston of conduit [108], the Sealing [106a] of piston [106] must have excellent sealing performance, does not have fluid leaks so that reach ideally between the high low pressure fluid.
When the operational order of off switch parts [101] provides hydraulic control device [109], the contact channel that is connected to low-pressure tube [111] from conduit [108] is closed, meanwhile, the supply passage that high-pressure liquid is offered conduit [108] is then opened, so deferent [108] is a UNICOM with high-pressure conduit [114].Consequently, high-pressure liquid all is provided to the end face [107a] and the excellent side [107b] of stepped piston [106], because the thrust that area difference produced between end face and the excellent side moves upward piston [106], thus Closing Switch parts [101].When switch part [101] was closed, then conduit [108] was full of high-pressure liquid.
In order to address the above problem, a hydraulic operation structure is provided, this hydraulic operating mechanism is to arrange like this: unless send an operational order, the hydraulic pressure that is applied on the big piston side of piston end surface is always high.
In addition, the operating device as contact maker must have so-called " anti-jump function " (anti-pumping function).For example,, electric power system sends an interrupt instruction for fixing a breakdown, and meanwhile by manual method when contact maker sends an out code, simultaneously prevent to excite function (normally circuit structure) just can work, reach with this and after closed action is finished, finish interruption operation.At this moment, if after interrupt action is finished, this close command still exists, and contact maker is closed again so, so the possibility that still has fault to exist in electric power system.This phenomenon is called the action of beating (pumping operation), should adopt electric measure or mechanical measure to be prevented.
Fig. 2 and Fig. 3 represent the sectional drawing of general hydraulic operating mechanism.In the drawings, [1] is the switch contact that is connected to driver part [6] by rod [2], so as to finishing closure and interruption operation.Driver part comprises one in order to drive the stepped piston [3] of contact [1], a Sealing [3a], an oil hydraulic cylinder [5] and dsah-pot ring [4a] and [4b].Driver part is by main valve [7] operation, and high-pressure liquid provides by amplifying valve [8].High-pressure liquid is to be provided by accumulator [9], and accumulator [9] makes it remain predetermined pressure by a not shown pump.
Deliver in the loculus [5a] on the small piston face in the oil hydraulic cylinder [5] by conduit [10] from the high-pressure liquid of accumulator [9], further offer main valve [7] by conduit [11] again.
Main valve [7] comprises an exhaust-valve [14], a supply valve [13], and they are opposite each other, and a spring [13a].The directed cavity [15] of exhaust-valve [14] stands by the effect of conduit [16] from the high-pressure liquid of amplifying valve [8] introducing.Consequently, supply valve [13] and exhaust-valve [14] move together, play switch main valve [7].That is, when the directed cavity [15] that does not act on exhaust-valve [14] when high-pressure liquid went up, it was by chamber [5b] on the big piston face of stepped piston [3] and low-pressure cabinet [18] connection.
On the other hand, when the directed cavity [15] that acts on exhaust-valve [14] when high-pressure liquid went up, the chamber [5b] of the big piston face of stepped piston [3] was connected to accumulator [9] by conduit [11].Conduit [45] is to come out from conduit [12] branch, provides high-pressure liquid in order to the side to the auxiliary supply valve [20] of amplifying valve [8].In addition, conduit [46] is guide to directed cavity [21] from the high-pressure liquid of accumulator.One end of interruption valve [38] is connected to directed cavity [21] by conduit [37] and conduit [25], and its other end is connected to low-pressure cabinet [18] by conduit [40].Amplifying valve [8] is by auxiliary exhaust-valve [19], and auxiliary supply valve [20] and spring [20a] are formed, and bears the effect of the high-pressure liquid of the directed cavity [21] by assisting exhaust-valve [19].Therefore, auxiliary exhaust-valve [19] and auxiliary supply valve [20] have moved the effect of switch amplifying valve [8] together.That is, when highly pressurised liquid acted on the directed cavity [21], conduit [16] was connected to accumulator [9] by conduit [45].On the other hand, when highly pressurised liquid did not act on the directed cavity [21], conduit [16] was connected to low-pressure cabinet [18] by conduit [22].
Interruption valve [28] is made up of ball valve [30] and returning spring [32], and by operating according to the interruption calutron [36] of instruction moving linearly by hook stick.
The directed cavity [21] of auxiliary exhaust-valve [19] is connected to the amplifying valve [8] at its middle part by contraction mouth [24] and conduit [23], and is connected to conduit [25].Conduit [25] is connected to an end of cut-off valve [38] by safety check [26] and conduit [37], and is connected to an end of interruption valve [28] by conduit [40], and interruption valve [28] is connected to low-pressure cabinet [18] by conduit [27].
Cut-off valve [38] and interruption valve [28] are respectively by ball valve [29] and [30], and returning spring [31] and [32] are formed, and by hook stick [33] and [34], by operating according to the straight-line calutron of instruction [35] and [36].Calutron is made up of with fixed coil [35b] and [36b] movable core [35a] and [36a].
In the interrupt status of the hydraulic mechanism of said structure shown in Figure 2, when calutron [35] was issued in an out code, movable core [35a] just was driven, and cut-off valve [38] then is pushed by hook stick [33], thereby opens ball valve [29].This can allow high-pressure liquid to pass through safety check [26] and conduit [25], arrives the directed cavity [21] of auxiliary exhaust-valve [19] from conduit [37].The effect of high-pressure liquid moves down the auxiliary exhaust-valve [19] of amplifying valve [8], closing the conduit [22] that is connected in low-pressure cabinet [18], and unlatching and the opposed auxiliary supply valve of conduit [22] [20].This can allow high-pressure liquid to pass through conduit [12], and conduit [45] and conduit [16] arrive the directed cavity [15] of exhaust-valve [14], so that switch main valve [7].In this situation because high-pressure liquid applies through conduit [45] and [23] and contraction mouth [24], even so cut-off valve [38] when resetting, above-mentioned reposition is still lasting constant.When high-pressure liquid acted on directed cavity [15], exhaust-valve [14] was closed the conduit [17] that is connected on the low-pressure cabinet [18], and opposed supply valve [13] is then opened.Consequently, high-pressure liquid is by the chamber [5b] on supply valve [13] and conduit [11] arrival stepped piston [3] the large size side, upwards pushed away under the effect with the power that pressure difference produced on the stepped piston shown in the figure [3] bearing surface, with closed contact [1], as shown in Figure 3.
When calutron [36] was issued in central severed finger order, movable core [36a] acted on interruption valve [28] by hook stick [34], to open ball valve [30].Consequently, the directed cavity [21] of the auxiliary exhaust-valve [19] of amplifying valve [8] is connected with low-pressure cabinet [18] with [27] by conduit [25], so high-pressure liquid is discharged.Therefore, the auxiliary escape cock [19] of amplifying valve [8] is opened, and auxiliary supply valve [20] then cuts out.For this reason, the directed cavity [15] of the exhaust-valve [14] of main valve [7] is connected to low-pressure cabinet [18] by conduit [16] and [22], high-pressure liquid in the directed cavity [15] then is drained, the exhaust-valve [14] of main valve [7] is then opened the conduit [17] that is connected on the low-pressure cabinet [18], and closes opposed supply valve [13].Then, the high-pressure liquid in the chamber [5a] on the big piston face of stepped piston [3] is discharged by conduit [17].Consequently, stepped piston [3] is pushed to the below in the drawings, and contact [1] is disconnected, and gets back to state shown in Figure 2.
Although poppet valve can replace ball valve used in the said structure, their structure is similar to ball valve with effect, introduces explanation so omit it at this.
Because the structure of general hydraulic operating mechanism as mentioned above, so conduit is so-called height pulsation circuit, high pressure conditions and low-pressure state are alternately to occur therein.Therefore, when sneaking into such as the such gas of air or being dissolved in the fluid, and when conduit was in high pressure conditions, bubble did not exist, and when conduit was in low-pressure state for a long time, then bubble appeared in the fluid, caused the obstruction of high low pressure pulsation conduit thus.
When high-pressure liquid was applied in the high low pressure pulsation conduit in these cases once more, because the compression of bubble and cooling down, the conduction of pressure just was pushed late.Therefore, the transmission of operation signal has also just been slowed down, cause and the pass time inconsistent.
Therefore, in this general hydraulic operating mechanism, after mechanism's general assembly, for removing the gas in the mechanism, some pre-operations of work are necessary to take a moment.Because pre-operation needs cycle time expand, so in the time of after mechanism is installed in the place of electric substation and so on, will doing such operation, electric substation receives time of recovery steady state required on the circuit may be oversize, thereby cause some problems of management of electric substation.
In addition, at closed state, high-pressure liquid and low-pressure fluid are made tight fluid-tight by tight sealing [3a].If Sealing [3a] is damaged owing to sliding fast, so a large amount of high-pressure liquids will be discharged in the low-pressure cabinet [18], and the result causes the pressure in the accumulator [9] to descend rapidly.
The hydraulic operating mechanism that the present invention relates to has such structure, non-ly is in the situation of sending an operational order, and hydraulic pressure on the big piston side of piston end surface is total to keep a high hydraulic pressure otherwise be applied to.When piston is parked in its position of returning, owing to the thrust that difference produced between the power that is applied on the piston two sides fails with regard to being held the device gripping.
Consequently, unless be in the moment of operation, the excellent side of stepped piston just can not become low pressure, so the gas that is dissolved in the fluid just can not form bubble yet, thereby prevents to cause switching time inconsistent.
Fig. 1 is the schematic representation of general hydraulic operating mechanism.
Fig. 2 is the detailed section view of general hydraulic operating mechanism when being in interrupt status.
Fig. 3 is the sectional view of operating device shown in Figure 2 when being in closed state.
Fig. 4 is the schematic representation of expression one embodiment of the present of invention when being in closed state.
Fig. 5 is identical with Fig. 4 but the view of expression interrupt status.
Fig. 6 is the time graph of the operation of explanatory drawing 4 and mechanism shown in Figure 5.
Fig. 7 is the sectional view of the embodiment of a hydraulic operating mechanism of the present invention when being in opening state.
Fig. 8 is identical with Fig. 7 but the sectional view of expression closed state.
Fig. 9 is the time graph of the operation of explanatory drawing 7 and mechanism shown in Figure 8.
Figure 10 is the sectional view of the embodiment of a hydraulic operating mechanism of the present invention when being in closed state.
Figure 11 is identical with Figure 10 but the sectional view of expression opening state.
Figure 12 is the time graph of the operation of explanation Figure 10 and mechanism shown in Figure 11.
Figure 13 is embodiment's the sectional view of the main body of a hydraulic operating mechanism of the present invention.
Figure 14 is identical with Figure 13 but another embodiment is described.
Figure 15 represents the circuti diagram of the anti-device of beating of general design.
Figure 16 is the sectional view of another hydraulic operating mechanism embodiment of the present invention when being in closed state.
Figure 17 is expression contact view of correlation between trigger and the anti-trip(ping) bar when being in closed state.
Sectional view when Figure 18 represents that Figure 16 shown device is in the contact opening state.
Figure 19 is identical with Figure 17 but the expression contact is in the view when opening state.
Figure 20 and 21 is partial sectional views of correlation between expression trigger and the anti-trip(ping) bar.
Figure 22 is the sectional view of another hydraulic operating mechanism embodiment of the present invention when being in opening state.
Figure 23 is identical with Figure 22 but the sectional view of table moving contact when being in closed state.
Referring now to switching device narration one embodiment of the present of invention that are in closure state shown in Figure 4. In the drawings, [124] are drive units, and it comprises differential piston [126] and hydraulic cylinder [107].
The conduit [128] that is connected in hydraulic cylinder [107] end face [107a] is connected to hydraulic control [129], and this hydraulic control [129] then is connected to low-pressure cabinet [110] by low-pressure tube [111]. Stop its engaging mechanism [131] that upwards promotes to comprise that is slidably meshed a pivot [132] when blocking differential piston [126], and be connected to hydraulic control [129] by conduit [130]. Engagement pivot [132] among the figure is according to supply and the discharging of hydraulic oil, and corresponding engaging mechanism [131] is done to the right and motion left.
Now in conjunction with time graph narration the present invention shown in Figure 6 practical operation situation according to the hydraulic operating mechanism of above-mentioned structure.In the figure, (a) the on-off phase place of expression operation instruction signal (b) is represented in the conduit [128] and the variation in pressure of stepped piston [126] end face, (c) displacement of expression stepped piston [126], (d) displacement of expression engagement pivot [132].
Fig. 4 represents closed state, when in order to open switch part [101], to being in time a shown in Fig. 6 (a)
1Hydraulic control device [129] when sending an operational order, be applied to by conduit [114] that high-pressure liquid on stepped piston [126] end face [107a] then passes through conduit [128] and conduit [111] is discharged in the low-pressure cabinet [110].Because hydraulic control device [129] is arrangement like this, thus the high-pressure liquid just stop supplies at once this moment of conduit [128] offered, so end face [107a] is inboard and conduit [128] drops to Fig. 6 (b) figure b at once
1Low pressure shown in the point.Then, stepped piston [126] impel it contact by figure b(c) shown in put c
1To c
2Make opening movement.At this moment, because high-pressure liquid provides by conduit [130] from hydraulic control device [129] and tests engaging mechanism [131], [see the some c among Fig. 6 (c) so finish its action at the contact opening direction when differential piston [126]
2] time, engagement pivot [132] impels it by the some d among Fig. 6 (d)
1To d
2Work is to left movement.Engagement between stepped piston [126] and the engagement pivot [132] is (to see the some d among Fig. 6 (d) at short notice
2) finish, after this, just can open the high-pressure liquid service duct that leads to conduit [128] by the operation hydraulic control device, the conduit [111] that communicates with low-pressure cabinet [110] then is judged, the end face [107a] of stepped piston [126] and conduit [128] communicate with high-pressure conduit [114] like this, as the some b among Fig. 6 (b)
2Shown in, its inside has been full of high-pressure liquid, so just present interrupt status as shown in Figure 5.
When for the operational order that makes contact closure to hydraulic control device [129] when sending, pressure in the conduit [130] descends at once, thereby the power that acts on the engagement pivot [132] is disengaged, and this engagement pivot [132] just is returned to original state by the effect of not shown spring or by the effect that is arranged on the suchlike spring in the geared assembly [131].At this moment, because high-pressure liquid is full of the inside of conduit [128] and the end face [107a] of stepped piston [126], and and conduit [114] is communicated with, so the engagement one between engagement pivot [132] and stepped piston [126] discharges, stepped piston [126] is just by the contact closure direction, to state-driven as shown in Figure 1.When differential piston [126] drives beginning, for the operation of then carrying out is prepared, can be by operation hydraulic control device [129], conductive pipe [130] supply highly pressurised liquid.
To narrate one embodiment of the present of invention in more detail in conjunction with Fig. 7 now, wherein conduit [51] offers the high-pressure liquid from accumulator [9] sidepiece of the auxiliary supply valve [19] of amplifying valve [8].Conduit [52] makes from the high-pressure liquid of accumulator and is incorporated into an end of cut-off valve [38] by contraction mouth [54] and conduit [56], and is incorporated into directed cavity [21] by contraction mouth [53] and conduit [55].One end of interruption valve [28] is linked directed cavity [21] by conduit [57] and conduit [55], and its other end is linked low-pressure cabinet [118] by conduit [58].The conduit [56] that is connected to cut-off valve [38] one ends is connected to holding mechanism [61] by conduit [59], and the other end of cut-off valve [38] is connected to low-pressure cabinet [18] by conduit [60].Holding mechanism [61] comprises the small piston [62] that drives by the effect of high-pressure liquid, this small piston [62] promotes can be around the hook [63] of axle [64] rotation of being fixed in oil hydraulic cylinder [5], to remain secured to protruding [50] and the engagement between the hook [63] on the stepped piston [3].It should be noted that, the shape of hook [63] is such, pressure on small piston [62] is disengaged, and when stepped piston [3] applied axial (a making progress) thrust, the thrust that acts on the stepped piston [3] automatically broke away from hook [63] with protruding axle [50].
Then, now will be in conjunction with time graph narration interrupt operation shown in Figure 9.In the figure, (a) excitation pulse of expression interruption electromagnetic mechanism [36] opens and the pass program, (b) variation of directed cavity [21] fluid pressure of the auxiliary exhaust-valve [19] of expression, (c) expression together the motion auxiliary exhaust-valve [19] and the position of auxiliary supply valve [20] move, (d) variation of directed cavity [15] fluid pressure of expression exhaust-valve [14], (e) expression together the motion exhaust-valve [14] and the position of supply valve [13] move, (f) be illustrated in the variation that acts on the hydrodynamic pressure on big of the stepped piston in the chamber [5b], (g) motion of expression stepped piston [3] and (h) motion of expression hook [63].
Fig. 8 represents closed state, when at a shown in Fig. 9 (a)
1Time point is opened contact [1], and when electromagnetic mechanism [36] sent a close command, then movable core [36a] was driven, and affacted on the interruption valve [28] by hook stick [34], thereby opens ball valve [30].
Consequently, the directed cavity [21] of the auxiliary exhaust-valve [19] of amplifying valve [8] is connected to low-pressure cabinet [18] by conduit [57] and [58], and highly pressurised liquid is at the b shown in Fig. 9 (b) like this
1Time point is discharged from.So, at the c shown in Fig. 9 (c)
1Time point, the auxiliary exhaust-valve [19] of amplifying valve [8] is opened, and auxiliary supply valve [20] cuts out.Therefore, at the d shown in Fig. 9 (d)
1Time point, the directed cavity [15] of the exhaust-valve [14] of main valve [7] is connected to low-pressure cabinet [18] by conduit [22], and the high-pressure liquid in directed cavity [15] then is drained.When the high-pressure liquid in directed cavity [15] is drained, at the e shown in Fig. 9 (e)
1Time point, the exhaust-valve [14] of main valve [7] is opened and is connected to the conduit [17] of low-pressure cabinet [18], and closes opposed supply valve [13].So, at the f shown in Fig. 9 (f)
1Time point, the high-pressure liquid that acts in chamber [5b] on the big piston face of stepped piston [3] is drained by conduit [17].Consequently, produce the downward thrust shown in the figure, at the f shown in Fig. 9 (f)
1Time point causes stepped piston [3] by interrupting the direction setting in motion.When differential piston [3] is finished the position of its motion of interrupting direction and protruding axle [50] traversing hook [63] (at the g shown in Fig. 9 (g)
2Time point) time, at the h shown in Fig. 9 (h)
1Time point, hook begin to rotate around axle [64] through spring [88] effect, and at h
2Time point and protruding axle [50] engagement.Hook [63] promotes through spring [86], further meshes with the end [84a] of plate machine [84].On the other hand, at a shown in Fig. 9 (a)
2Time point, when the instruction of issuing electromagnetic mechanism [36] was disengaged, because interruption valve [28] has been closed in the effect of hydraulic pressure, ball valve [30] moved up and resets.
At this moment, because high-pressure liquid is supplied with holding mechanism [61] by conduit [59] and contraction mouth [54] from accumulator [9], hook [63] is always promoted from behind by small piston [62], so stepped piston [3] is finished its motion of interrupting direction (at the g shown in Fig. 9 (g)
1Time point).When the position of protruding axle [50] traversing hook [63], at the h shown in Fig. 9 (h)
1Time point, hook [63] promotes through small piston [62], begins to rotate around axle [64], and at the h shown in Fig. 9 (h)
2Time point is with protruding axle [50] engagement.On the other hand, at a shown in Fig. 9 (a)
1Time point, when the instruction of issuing electromagnetic mechanism [36] can be disengaged, ball valve [30] was under the effect of hydraulic pressure, and moving up resets, and therefore closes interruption valve [28].
Consequently, at the b shown in Fig. 9 (b)
2Time point, high-pressure liquid progressively is applied to directed cavity [21] by contraction mouth [53] and conduit [55], when the pressure in the directed cavity [21] reaches predetermined value, the back pressure that is applied on the Auxiliary valves [20] at closed state surpasses the back pressure that is applied on the auxiliary exhaust-valve [19], so auxiliary exhaust-valve [19] and auxiliary supply valve [20] move together (at the c shown in Fig. 9 (c)
2Time point).The auxiliary exhaust-valve [19] of amplifying valve [8] is closed the conduit [22] that is connected to low-pressure cabinet [18], and opens opposed auxiliary supply valve [20].Then, high-pressure liquid by conduit [51] and conduit [16] (at the d shown in Fig. 9 (d)
2Time point) is applied to the directed cavity [15] of exhaust-valve [14], thereby removes switch main valve [7] again.When the directed cavity [15] that acts on exhaust-valve [14] when high-pressure liquid goes up, at the e shown in Fig. 9 (e)
2Time point, the conduit [17] that is connected to low-pressure cabinet [18] is closed, and causes opposed supply to close [13] and opens.Consequently, high-pressure liquid arrives on the big face of chamber [5b] stepped piston [3] by supply valve [13] and conduit [11], owing to accept the pressure difference of face, and at the f shown in Fig. 9 (f)
2Time point has produced a thrust that makes progress.Yet, because hook [63] has been finished it and the engagement of trigger [84], be applied to above-mentioned upwards thrust on the stepped piston [3] by hook [63] gripping, therefore, finish interrupt action, keep state shown in Figure 7.
To narrate closing operation now.In Fig. 7, when sending an out code with closed contact [1] to electromagnetic mechanism [35], movable core [35a] is driven, and affacts cut-off valve [38] to open ball valve [29] by hook stick [33].This causes conduit [58] and [60] discharging high-pressure liquid that is connected to low-pressure reservoir [18].Consequently, the power that promotes the small piston [62] of holding mechanism [61] from behind is disengaged, but when the power of small piston [62] is disengaged, because hook [63] has definite shape, so under the effect of the thrust of stepped piston [3], engagement between hook [63] and the protruding axle [50] is just put automatically to remove, so stepped piston [3] begins to move up, finally finishes closed procedure.On the other hand, high-pressure liquid in accumulator [9] offers conduit [59] by conduit [52] and contraction mouth [54] lentamente, thereby form state shown in Figure 8, in this state, conduit [59] is full of high-pressure liquid, when the action of differential piston [3] is finished, just prepare to carry out interrupt action thereafter at any time.
Because mechanism of the present invention done such arrangement,,, sneak into or the air that is dissolved in the fluid can not form bubble for this reason, thereby form a constant switching time so unless be in serviceability, otherwise the end face of conduit and stepped piston remains high pressure.Therefore, after mechanism's general assembly, do not need repetitive operation to get rid of the air of sneaking in the fluid, so have the easy to operate advantage of electric substation.
In addition, because high-pressure liquid almost always is applied to the end face and the excellent side of stepped piston, so needn't between stepped piston [3] and oil hydraulic cylinder [5], take tight fluid-tight measure, take place in the time of also can not flowing to low-pressure cabinet [18] to leak and cause unexpected pressure to reduce owing to high-pressure liquid.
In the explanation of one embodiment of the present of invention, use term " interruption " and " closure " to replace " closure " and " interruption " can access same effect respectively.
Although just the case of the application's case is described, wherein main valve is used for supplying with and discharging and the relevant high-pressure liquid of stepped piston large size side with amplifying valve together, yet, also can be with the direct supply of above-mentioned amplifying valve and discharging and the relevant high-pressure liquid of stepped piston large size side, in this kind occasion, also can access same beneficial effect.
As what narrated, because hydraulic operating mechanism of the present invention is to arrange like this.Unless be in the state that sends operational order, otherwise the hydraulic pressure that big piston face one side of end face is born is always high, and when piston is parked in its position of returning, the thrust that is produced by the power difference that is applied on the described piston two sides is held mechanism and blocks, so any gas that is dissolved in fluid can not form and cause inconstant bubble switching time, so after mechanism's general assembly, needn't the air of repetitive operation to sneak in the eliminating fluid.
Hydraulic operating mechanism of the present invention is to arrange like this, unless be in the state that sends operational order, otherwise hydraulic pressure that big piston face one side of end face is born and the hydraulic pressure that the formation pilot line bears so that main valve is done corresponding selectivity variation in conduit are always high, and when piston is parked in its position of returning, the piston thrust that is produced by the power difference that is applied on described piston end surface and the excellent side two sides is held mechanism and blocks, so any gas that is dissolved in and sneaks in the fluid can not form the bubble that those change switching time.
Because general fluid operated mechanism structure was narrated already, when a short burst operational order is dealt into interruption electromagnetic mechanism [36], only open ball valve [30] in a flash,, cause amplifying valve [8] to be in opposite state only in a flash, to reduce the pressure in the directed cavity [21].Yet because operational order only continues a very short time, this ball valve resets immediately, and high-pressure liquid offers directed cavity [21] from contraction mouth [53] once more, so the state of amplifying valve [8] before being returned to operational order immediately and sending.Because main valve [7] is returned to original state according to operational order from opposite location, finally to before finishing this motion, the stepped piston [3] that interrupts the direction motion get back to closing direction again, move upward.
Because hydraulic operating mechanism of the present invention is so design, so in case after finishing interrupt operation, stepped piston being responded by those in order to the high-pressure liquid of answer hydraulic switching valve, the position of carrying out switch motion provides.
Therefore, in case after finding that the operation of stepped piston is finished, just provide high-pressure liquid to hydraulic switching valve, even when operational order be form with short burst when the interruption electromagnetic mechanism sends, hydraulic operating mechanism still can suitably move.
To narrate an alternative embodiment of the invention in conjunction with the accompanying drawings now.In Figure 10, [74] are buffering rings, and its configuration mode can allow it to do vertical a little slip along oil hydraulic cylinder [5] inwall.At this state, piston [3] is pushed to buffering ring [74], and the circular groove [73] that disposes around buffering ring [74] leads to conduit [77] to the conduit [76] that is located in the oil hydraulic cylinder [5], and circular groove [73] separates with oil sealing mode and big side chamber of piston [5b].In addition, when buffering ring [74] by piston [3] compression, and conduit [76] and [77] inner hydrodynamic pressure be when being higher than hydraulic pressure in big the side chamber of piston [5b], buffering ring [74] is pushed to the top, makes big side chamber of piston [5b] and conduit [76], [77] connection.Conduit [76] is connected to conduit [11], and conduit [11] always is in high pressure, and high-pressure liquid flows to low-pressure cabinet [18] by regulating the contraction mouth [75] of discharging from accumulator [9], and conduit [77] is connected to directed cavity [21] by contraction mouth [72] and conduit [71].
Interrupt operation below in conjunction with time graph narration mechanism of the present invention shown in Figure 12.In the figure, (a) ON-OFF of the excitation signal of electromagnetic mechanism [36] is interrupted in expression, (b) hydraulic pressure in the directed cavity [21] of the auxiliary exhaust-valve [19] of expression changes, (c) the auxiliary exhaust-valve [19] of expression and the position of mobile auxiliary supply valve [20] together, (d) hydraulic pressure in the directed cavity [15] of expression exhaust-valve [14] changes, (c) the expression exhaust-valve [14] and the position of mobile supply valve [13] together, (f) hydraulic pressure that is illustrated in the big piston side of differential piston end surface in the chamber [5b] changes, (g) displacement of expression stepped piston [3], (h) displacement of expression hook [63], (i) hydraulic pressure in the expression annular groove [73] changes.
Figure 10 represents closed state, at a shown in Figure 12 (a)
1Time point when when electromagnetic mechanism [36] sent a close command, movable core [86a] was driven in order to open contact [1], and acts on interruption valve [28] by hook stick [34], to open ball valve [30].Consequently, the directed cavity [21] of the auxiliary exhaust-valve [19] of amplifying valve [8] is connected to low-pressure cabinet [18] by conduit [57] and [58], so at the b shown in Figure 12 (b)
1Time point, high-pressure liquid is drained.For this reason, at the c shown in Figure 12 (c)
1Time point, the auxiliary exhaust-valve [19] of amplifying valve [8] is opened, and auxiliary supply valve [20] then cuts out.Therefore, the directed cavity [15] of the exhaust-valve [14] of main valve [7] is communicated to low-pressure cabinet [18] by conduit [16] and conduit [22], at the d shown in Figure 12 (d)
1High-pressure liquid in the time point, directed cavity [15] is drained.When the high-pressure liquid in the directed cavity [15] is drained, at the e shown in Figure 12 (e)
1Time point, the exhaust-valve [14] of main valve [7] is opened and is connected to the conduit [17] of low-pressure cabinet [18], and closes opposed supply valve [13].Then, at the f shown in Figure 12 (f)
1Time point, the high-pressure liquid of big the side of piston of stepped piston [3] is drained by conduit [17] in chamber [5b].Consequently, produce the thrust of the downward direction shown in the figure, at the f shown in Figure 12 (f)
1Time point causes stepped piston [3] to begin by interrupting the direction motion.When differential piston [3] is finished the position of mobile and protruding axle [50] the traversing hook [63] that interrupts direction (at the g shown in Figure 12 (g)
2Time point) time, at the h shown in Figure 12 (h)
1Time point, hook promotes through spring [88], begins to rotate around axle [64], at h
2Time point, hook and protruding axle [50] engagement.In addition, hook [63] promotes through spring [86], with end [84a] engagement of plate machine [84].On the other hand, at a shown in Figure 12 (a)
2Time point, when the order that electromagnetic mechanism [36] is sent was disengaged, because the effect of hydraulic pressure, ball valve [30] moved up, thereby closes interruption valve [28].
When the pressure on the big face side of stepped piston [3] in chamber [5b] reduces, high-pressure liquid in conduit [76] and [77] is drained, meanwhile promote buffering ring [74], and the high-pressure liquid of supplying with lentamente from contraction mouth [75] is drained simultaneously also (referring to i shown in Figure 12
2Time point).
Therefore, even operational order is to provide with pulse shape, in case amplifying valve [8] and main valve [7] change their state, as mentioned above, high-pressure liquid in the conduit [77] just is drained, even so after operational order was disengaged, interruption valve [28] was when closing, amplifying valve [8] and main valve [7] yet can not change and recover their original state till stepped piston [3] is finished its action.
In this state, interrupt action is finished, and the lower surface of buffering ring [74] closely contacts with oil hydraulic cylinder [5].Therefore, at the i shown in Figure 12 (i)
2Time point offers annular groove [73] from the high-pressure liquid of accumulator [9] by contraction mouth [75], at the b shown in Figure 12 (b)
2Time point, high-pressure liquid further offer directed cavity [21] lentamente by contraction mouth [72] and conduit [71].When the pressure in the directed cavity [21] reaches a predetermined value that is predetermined, the back pressure that is applied on the auxiliary supply valve [20] goes up in back pressure above being applied to auxiliary exhaust-valve [19], assists exhaust-valve [19] and auxiliary supply valve [20] (referring to the c shown in Figure 12 (c) thereby move together
2Time point).Valve [19] cuts out the conduit [22] that connects low-pressure cabinet [18] between the auxiliary emptying of amplifying valve [8], and the auxiliary supply valve that links to each other with opposed conduit [22] of unlatching.At the d shown in Figure 12 (d)
2Time point, this causes high-pressure liquid to pass through conduit [12], and [51] and [16] arrive the directed cavity [15] of exhaust-valves [14], thus switch main valve [7] once more.When highly pressurised liquid acts on the directed cavity [15], at the e shown in Figure 12 (e)
2Time point, exhaust-valve [14] turn-offs the conduit [17] that is connected to low-pressure cabinet [18], and opens the supply valve [13] that is arranged on conduit [17] opposite.Consequently, at the f shown in Figure 12 (f)
2Time point, high-pressure liquid offers the big face side chamber [5b] of stepped piston [3] by supply valve [13] and conduit [11], because stepped piston [3] is accepted the pressure difference on the face, produces a thrust that makes progress.Yet, because the engagement between hook [63] and the protruding axle [50] is finished (referring to the h shown in Figure 12 (h)
2Time point), and again because back pressure (being to be caused by the high-pressure liquid that provides by contraction mouth [54] and conduit [59]) is to be applied on the small piston, thus the thrust that makes progress by linking up with [63] gripping, thereby finish interrupt action, and keep state shown in Figure 10.
Because closing operation is with before identical in conjunction with the described mechanism of Fig. 7 to Fig. 9, so its explanation will be omitted.
To narrate an alternative embodiment of the invention below.Figure 13 is the sectional drawing of the major component of expression present embodiment of the present invention.In the figure, [102] are Sealings, are used for glade plane space between fluid-tight piston [5] and the buffering ring [74].
At the final state of interrupt operation, when differential piston [3] beginning is meshed with buffering ring [74], increase by the pressure in the space of stepped piston [3] and buffering ring [74] delimitation, this hydrodynamic pressure produces control force.At this moment, if there is not Sealing [102], this high-pressure liquid will enter conduit [77] by gap [101] so.
Therefore, when the braking force that is produced by buffering ring [74] when being very big, because space [103] is under the very high pressure, and the pressure in the conduit [77] changes, institute causes the variation of directed cavity [21] internal pressure thus so that high-pressure liquid is got into conduit [77] firmly by contraction mouth [72].Therefore, at the time point early than initial state, the auxiliary driven misoperation of exhaust-valve [19] may take place.
In this kind situation, as shown in figure 13, can between oil hydraulic cylinder [5] and buffering ring [74], be equipped with Sealing [102], pass through buffering ring [74] from the working area to prevent high-pressure liquid, thereby can eliminate the worry of misoperation.
To narrate another now and have the embodiment of identical purpose with the embodiment who narrated in conjunction with Figure 13.
In Figure 14, [77a] for connecting the conduit of contraction mouth [75] and contraction mouth [72], [77a] always supplies with high-pressure liquid by contraction mouth [75] from accumulator [9].The intermediate portion of conduit [77a] is the arm that enters conduit [110].End with respect to the conduit [110] of conduit [77a] forms an opening [110a], when buffering ring [74a] by stepped piston [3] when shifting bottom position onto downwards, opening [110a] is closed.If fully by stepped piston [3] when promoting downwards, the pressure in conduit [77a] and [110] does not just uprise buffering ring [74b], this buffering ring [74b] is then by upwards promotion of hydrodynamic pressure, so the opening [110a] of conduit [110] just is unlocked.Therefore, in the original state of interrupt operation, the high-pressure liquid in the conduit [77a] discharges by opening [110a], thereby prevents that high-pressure liquid is sent in conduit [71] and the directed cavity [21].
On the other hand, in the end-state of interrupt operation, opening [110a] is cushioned ring [74a] and closes, so the high-pressure liquid that provides by contraction mouth [75] in the conduit [77a] is kept, and high-pressure liquid is admitted in conduit [71] and the directed cavity [21].At this moment, the high-pressure liquid in the space [103] between stepped piston [3] and the buffering ring [74b] enters gap [101], but because opening [110a] is cushioned ring [74b] blocking-up, so high-pressure liquid can't enter the inside of conduit [77a].
As what narrated, because pipeline is such arrangement, so according to the present invention, after interrupt operation is finished, high-pressure liquid is provided for hydraulic switching valve, even the pulse operation instruction is provided for when interrupting electromagnetic mechanism, hydraulic operating mechanism is operation normally still.
In addition, the operating device that is applicable to contact maker must have so-called " anti-jump function ".For example, when sending an interrupt instruction for the abnormal conditions of getting rid of electric power system, meanwhile, again with manual method when contact maker sends a close command, after closed procedure is finished, simultaneous exciting prevents that function (being carried out by electric wiring usually) from just can work, and makes it to finish interrupt action.At this moment, if after interrupt operation is finished, this close command still exists, and contact maker is just closed again so, and the abnormal conditions in the electric power system may exist like this.This phenomenon is meant the so-called operation of beating, and should take electric measure or mechanical measure to be prevented.
The operation of beating will be narrated with reference to Figure 15, wherein respectively interrupt instruction and close command be issued joint T and C, and contact maker interrupts coil TT by excitation or closing coil CC operates.Contact Aa and Ab be and the auxiliary contact of contact maker co-operate, and in the interrupt status of contact maker, contact Aa is unlocked, and contact Ab then is closed.At closed state, contact Aa is closed, and contact Ab then opens.Coil Y is an anti-electromagnetic relay of beating.When coil Y is energized, contact Ya closure, contact Yb then opens.
In interrupt status, for example, when a close command was issued joint C, closing coil CC was energized by contact Yb and Ya, thereby caused the contact maker closure.When contact closure is finished, contact Aa closure, and contact Ab unlatching makes closing coil end excitation.At this moment, if close commands continues to keep, then electric current reaches self-locking by closed contact Ya by coil Y, and contact Yb then opens.When in this case, when interrupt instruction is issued joint T, interrupt coil TT and obtain excitation by contact Aa, thus middle contact maker, and contact Aa opens again, with closed contact Ab.Even at this state, if close command still exists, contact maker is closed again so, the operation of beating just takes place, unless the different closing coil CC of contact Yb coupled in series, but owing to the contact Yb of self-locking coil Y is connected, so the operation of in circuit shown in Figure 15, beating.
Because general hydraulic operating mechanism is by above-mentioned arrangement, so anti-jump function is normally provided by the electromagnetic relay with complicated control wiring.For this reason, because misoperation may take place in the vibration that interruption itself causes, owing to the increase of electromagnetic relay quantity, it is too huge that mechanism will become again, and expensive.
In order to allow holding mechanism grip the thrust that acts on the stepped piston, hydraulic operating mechanism of the present invention utilizes a mechanism's enlarger in order to the amplifier operation signal, therefore the anti-jump functional entity of hydraulic operating mechanism can be made into mechanical device, for this reason, anti-jump functional entity can be done very simply, and cheap.
Closed electromagnetic mechanism [135] shown in Figure 16-21 comprises the fixed coil [135b] and the movable core [135a] that are installed in fixed end [80].At an end of movable core [135a], with the pivot mode the anti-connecting rod [81] of beating is installed with pivot [82] on it.One side of the anti-connecting rod [81] of beating forms a breach [81a] by spring [83] skew, serves as that an end [84c] of the trigger [84] of rotation meshes there with pivot [85].Trigger [84] is offset by spring [86].Stop position for decision trigger [84] has been equipped with eliminator [87].Trigger [84] has a projection [84b].Holding mechanism [87] is the stop position in order to decision trigger [84].The anti-pivot [89] of beating is contained in the position with respect to anti-connecting rod [81] of beating, and is promoted from the back side by spring [90].Interrupt status at contact maker.With respect to the end [84a] of the trigger [84] of anti-connecting rod [81] of beating back support hook [63], so that mechanically grip protruding axle [50] and link up with the engagement of [63] from hook [63].Hook [63] is by a back promotion with spring [88] of selected spring force from it, and like this, when the engagement between trigger [84] and the hook [63] was disengaged, the engagement between hook [63] and the protruding axle [50] also just automatically was disengaged.
Then, the closure that will narrate said mechanism of the present invention is now being grasped.
Figure 18 represents interrupt status, and for closed contact 1, when a close command was issued electromagnetic mechanism [135], movable core [135a] was driven and moves down the anti-connecting rod [81] of beating.Therefore, an end [84c] of trigger [84] impels trigger to clockwise rotate, and the engagement between the end [84a] of trigger [84] and the hook [63] is disengaged.At this moment, high-pressure liquid offers two piston areas [5a] and [5b] of stepped piston [3], the thrust of the stepped piston [3] that is produced by the piston area product moment of stepped piston, cause the engagement between hook [63] and the protruding axle [50] to be disengaged, so the stepped piston [3] that moves up, thereby closed contact maker.At this moment, because trigger [84] rotates, projection [84b] causes the anti-connecting rod [81] of beating to rotate, and in this moment, close command is disengaged, and trigger [84] and the anti-connecting rod [81] of beating are obtained the position shown in Figure 16 and 17, to finish closed procedure.
Narration interrupt operation now.Represent closed state in Figure 16 and 17, in order to open contact, when a close command was issued electromagnetic mechanism [36], movable core [36a] was driven, and acted on the interruption valve [28] by operating stem [34], to open ball valve [30].In this mode identical with general mechanism, amplifying valve [8] and main valve [7] are by switch, high-pressure liquid in chamber [5b] on stepped piston [3] the big piston face is drained, stepped piston [3] is moved down, when the traversing hook [63] through spring [88] skew of protruding axle [50], hook [63] and protruding axle [50] engagement are through the end [84a] of the trigger [84] of spring [86] skew with link up with [63] and mesh.After this, the amplifying valve [8] and the main valve [7] that are same as a section mechanism reset, thereby high-pressure liquid is applied on the big piston face in chamber [5b], so finish the interrupt status shown in Figure 18 and 19.
Narrate anti-jump function now.Even after contact closure is finished, also i.e. closed state shown in Figure 16 and 17, when close command continued to send, anti-jump connecting rod [81] and anti-jump pivot [89] engagement as shown in figure 20, were lived to prevent that anti-jump connecting rod [81] is multiple.At this state, the order of central severed finger is sent and stepped piston [3] moves down when meshing protruding axle and hook [63], and trigger [84] resets, to grip protruding axle [50] and to link up with the engagement of [63].Yet, because anti-jump connecting rod [81] prevented to reset by anti-jump pivot [89], so unless close command is disengaged and the breach of trigger [81] [81a] and end [84c] are engaged, shown in Figure 18 and 19, otherwise contact maker closure no longer, so reach anti-jump function.
As what narrated, hydraulic operating mechanism of the present invention is to arrange like this, in order to grip the thrust that acts on the stepped piston, the amplification of the operation signal of holding mechanism is to finish by the mechanical amplifying device that has trigger rather than have a hydraulic switching valve, therefore compare with the general mechanism that utilizes electromagnetic relay, available very simple mechanism obtains anti-jump function.For this reason, can obtain to have reliable performance, the hydraulic operating mechanism of cheap anti-jump function.
Though the present invention is narrated with regard to several practical embodiments of the present invention, obtain as Figure 22 and 23 the 5th illustrated embodiments in conjunction with the 3rd embodiment and the 4th embodiment shown in Figure 17-22 shown in Figure 10-14, this also is possible.
Claims (9)
1, a kind of hydraulic operating mechanism, wherein stepped piston is used as driver part, wherein stepped piston is to be driven by the high-pressure liquid that is applied on the big piston face by a hydraulic pressure control mechanism, this hydraulic control is in order to control hydraulic pressure, stepped piston is also driven by the high-pressure liquid that is applied to consistently on the small piston face simultaneously, the structure of described fluid operated mechanism is to arrange like this, when described stepped piston is parked in the position of its answer, high-pressure liquid acts on described two piston areas simultaneously, be applied to the thrust that the power difference on described two piston areas is produced, the holding mechanism that is applied on described stepped piston or its extension part grips, in a single day the gripping force of described holding mechanism is disengaged, stepped piston just moves forward, in case the high-pressure liquid that is applied on the described big piston face side is disengaged, then described piston just moves round about.
2, hydraulic operating mechanism as claimed in claim 1, the amplification of the operation signal of wherein said holding mechanism and in order to the amplification of the input signal of operating described hydraulic switching valve the two all is to be carried out by hydraulic pressure, for the high-pressure liquid of replying described hydraulic switching valve is to be provided by the accumulator that remains high pressure by contraction mouth.
3, hydraulic operating mechanism as claimed in claim 1, the amplification of the operation signal of wherein said holding mechanism and in order to the amplification of the input signal of operating described hydraulic switching valve the two all is to be carried out by hydraulic pressure, for the high-pressure liquid of replying described hydraulic switching valve is to be provided by the pressure relief function portion according to the motion switch of described stepped piston, described pressure relief function portion is arranged between the accumulator and described hydraulic switching valve that always keeps high pressure.
4, hydraulic operating mechanism as claimed in claim 1, wherein said pressure relief function portion comprise one with the ring body of described stepped piston with the coaxial manner engagement, and this ring body can slide along the inwall of described poor merit hydraulic pressure.
5, hydraulic operating mechanism as claimed in claim 1, wherein contraction elements places between described pressure relief function portion and the described accumulator.
6, hydraulic operating mechanism as claimed in claim 1, the amplification of the operation signal of wherein said holding mechanism realizes mechanically, amplification in order to the input signal of operating described hydraulic switching valve then is to be carried out by hydraulic pressure, the high-pressure liquid of replying described hydraulic switching valve is by according to the motion of described stepped piston and the pressure relief function portion of switch provides, and described pressure relief function is deployed between accumulator that always keeps high pressure and described hydraulic switching valve.
7, hydraulic operating mechanism as claimed in claim 6, wherein said pressure release portion comprise one with the ring body of described stepped piston with the coaxial manner engagement, and this ring body can slide along the inwall of described differential hydro cylinder.
8, hydraulic operating mechanism as claimed in claim 6, wherein contraction elements places between described pressure relief function portion and the described accumulator.
9, hydraulic operating mechanism as claimed in claim 1, the amplification of the operation signal of wherein said holding mechanism is realized by machinery type, amplification in order to the input signal of operating described hydraulic switching valve then is to be carried out by hydraulic pressure, and the high-pressure liquid of replying described hydraulic switching valve is to be provided by the accumulator that remains high pressure by contraction mouth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN86104051.1A CN1004823B (en) | 1986-06-12 | 1986-06-12 | Hydraulic operating mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN86104051.1A CN1004823B (en) | 1986-06-12 | 1986-06-12 | Hydraulic operating mechanism |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN86104051A true CN86104051A (en) | 1988-05-04 |
| CN1004823B CN1004823B (en) | 1989-07-19 |
Family
ID=4802303
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN86104051.1A Expired CN1004823B (en) | 1986-06-12 | 1986-06-12 | Hydraulic operating mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1004823B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102037533A (en) * | 2008-05-17 | 2011-04-27 | Abb技术有限公司 | Circuit breaker drive |
| CN102379019A (en) * | 2009-04-01 | 2012-03-14 | Abb技术有限公司 | Hydromechanical drive for electrical circuit breakers |
| CN105351275A (en) * | 2015-11-06 | 2016-02-24 | 河南平芝高压开关有限公司 | Integrated valve and circuit breaker hydraulic operating mechanism with integrated valve |
| CN105443463A (en) * | 2015-12-01 | 2016-03-30 | 河南平芝高压开关有限公司 | Anti-jumping switch-on-off hydraulic operation mechanism and breaker with operation mechanism |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102009052531A1 (en) * | 2009-11-11 | 2011-05-12 | Hoerbiger Automatisierungstechnik Holding Gmbh | machine press |
-
1986
- 1986-06-12 CN CN86104051.1A patent/CN1004823B/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102037533A (en) * | 2008-05-17 | 2011-04-27 | Abb技术有限公司 | Circuit breaker drive |
| CN102379019A (en) * | 2009-04-01 | 2012-03-14 | Abb技术有限公司 | Hydromechanical drive for electrical circuit breakers |
| CN105351275A (en) * | 2015-11-06 | 2016-02-24 | 河南平芝高压开关有限公司 | Integrated valve and circuit breaker hydraulic operating mechanism with integrated valve |
| CN105443463A (en) * | 2015-12-01 | 2016-03-30 | 河南平芝高压开关有限公司 | Anti-jumping switch-on-off hydraulic operation mechanism and breaker with operation mechanism |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1004823B (en) | 1989-07-19 |
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