CN204118016U - The short-circuit protection operating current adjusting device of multipolar electromagnetic release - Google Patents

Abstract

The short-circuit protection operating current of multipolar electromagnetic release regulates its device, its electromagnetic system comprises auxiliary static iron core, second static iron core, coil, back-moving spring and dynamic iron core, and at initial position, assist and be provided with the first gap between static iron core and dynamic iron core, dynamic have the second gap between iron core and the second static iron core, its thickness changes in the same way with the size variation of trip threshold, the elastic force of back-moving spring is inverse change with the size variation of trip threshold, when drop-away current value is by during greatly to minor adjustment, the energy of coil reduces with quadratic relation with the electric current flow through, simultaneously, the reduction that dynamic electromagnetic attraction between iron core and the second static iron core is inversely proportional to the thickness in the second gap strengthens with quadratic relation, by the balance automatically reached between these two quadratic power functions, make the fixed correspondence linearly of the electromagnetic attraction needed for action of the adjustment of drop-away current value and dynamic iron core, user regulates trip threshold convenient, reliably, stable.

Description

The short-circuit protection operating current adjusting device of multipolar electromagnetic release

Technical field

The utility model relates to a kind of magnetictrip of low pressure multipole circuit breaker, is specifically related to a kind of instantaneous release, particularly a kind of short-circuit protection operating current control method of multipolar electromagnetic release and the device of employing the method realization.

Background technology

As everyone knows, low-voltage circuit breaker is a kind of device for switching with defencive function, and its most basic defencive function is as overload protection and short-circuit protection, and wherein short-circuit protection is performed by instantaneous release.According to the regulation of UL489 standard, the function that the trip threshold that instantaneous release needs to have setting is adjustable, namely by the drop-away current action preset value (hereinafter referred to as " trip threshold ") of this release of knob adjustable on operation release, thus, there is the release of this function usually referred to as instantaneous adjustable release.Trip threshold described here refers to the set point relevant to the maximum of the short circuit current designing permission, is usually adjusted by the rated current of this circuit breaker.The function that the trip threshold of instantaneous adjustable release is adjustable, just refer to that the threshold value of drop-away current is adjustable, adjust the requirement of the maximum permissible value of short circuit current under meeting different operating mode to make same magnetictrip, the requirement of the circuit breaker of different rated current can be met in other words.Conventional instantaneous adjustable release is as magnetictrip, generally include solenoid, yoke, dynamic iron core, static iron core and back-moving spring, under normal circumstances, the electric current flow through in solenoid is less than trip threshold, dynamic iron core keeps being separated with static iron core under the elastic force effect of back-moving spring, and certain thickness air-gap is formed between dynamic iron core and static iron core, when flowing through the actual current in solenoid and being equal to or greater than trip threshold, then dynamic iron core produces trip action at once, because now dynamic electromagnetic attraction between iron core and static iron core becomes the elastic force being greater than back-moving spring, so the elastic force that dynamic iron core can overcome back-moving spring moves to static iron core, until with static iron core adhesive, dynamic iron core is to the mobile tripping lever action touching circuit breaker of static iron core, and cause circuit breaker to realize instantaneous trip tripping operation, thus play short-circuit protection effect.

But, current instantaneous adjustable release ubiquity operating value is unstable, the problem of poor reliability, especially for a long time, designer, when designing the instantaneous adjustable release of small electric stream (such as below 100A), is difficult to the problem solving operating value instability, poor reliability.Applicant analyzes its reason and finds that the function model involved by trip action current adjustment has feature that is polynary and complicated function relation, and is formed by electromagnetic and mechanistic two kinds of model composition.The design of current instantaneous adjustable release due to one be have ignored the variable relevant to regulating trip action electric current and with the functional relation regulating trip action electric current, two is lack necessary balance planning of science activities between each variable element to adjustable release system, thus make more variable element unbalance because regulating simultaneously, cause the physical characteristic of adjustable release and the out of control of mechanical property thus, this will inevitably make adjustable release occur the series of problems such as operating value instability, poor reliability, makes the adjustable extent of trip threshold can not do greatly simultaneously.As the solenoid type electromagnetic trip disclosed in ZL200820214752.8 Chinese patent, this patent is by the length of knob regulating spring, realize the linear regulation of short circuit current, by yoke arranges adjustment screw, magnetic gap can be finely tuned, eliminate by part itself, assemble the inconsistent of the release current setting caused, solve the consistency of initial setting value preferably, but because the prior art have ignored the functional relation that this variable of magnetic field energy of solenoid and this variable are proportional to the quadratic power of trip action electric current, in addition, although be linear functional relation between the elastic deformation amount of back-moving spring and its elastic force, but the functional relation not considering between electromagnetic attraction between its dynamic iron core and static iron core and trip action electric current is complicated non-linear, non-triangle functional relation, still there is the problem of unsteadiness and poor reliability, this is a representative example of the common magnetictrip adjustable based on Spring balanced principle design trip threshold.Therefore, such prior art products certainly exists following defect: one is the significantly decline of magnetic field energy due to solenoid, the proportion making the leakage field of magnetic gap account for the magnetic field energy of solenoid significantly rises, therefore the drop-away current of adjusting knob indicates and there is very large error between the trip action current value of reality, special in little drop-away current situation, this error and unsteadiness are more serious, also greatly limit the adjustable extent of trip action electric current thus.Two is the structures not having design balance to plan between each variable element due to this magnetictrip system, therefore the regulating error of drop-away current is very responsive for foozle, even if when being finely tuned magnetic gap by adjustment screw, also can only improve the inconsistency of the initial condition of each phase release, the trip threshold of each phase magnetictrip under each adjustment state and the consistency of actual trip action current value can not be solved.Three is owing to not being linear functional relation between the trip action current value of reality and the elastic force of back-moving spring, and therefore the adjustable range of trip threshold is less, and job stability under the state of little trip threshold and dropout integrity problem highlight more.Four is because back-moving spring must be arranged on the outside of coil by this adjustable release based on Spring balanced principle, so not only complex structure, volume is large, Installation and Debugging are difficult, but also the pair that is slidably matched that need increase as minor axis and sliding tray, back-moving spring parallel with the moving direction of dynamic iron core (more impossible realization is coaxial) cannot be ensured, the large and instability problem of error between trip action value instability, poor reliability, the trip threshold of setting and the trip action current value of reality must be aggravated thus.

Utility model content

In order to overcome many defects of the above-mentioned adjustable release prior art based on Spring balanced principle, the purpose of this utility model is the device providing a kind of short-circuit protection operating current control method of multipolar electromagnetic release and adopt the method to realize, it is based on the adjustable magnetictrip of the trip threshold of a new generation of new principle of energy balance design, adopt simple, small-sized, easy optimizes structure, can overall balance to regulate relevant each electromagnetism of trip threshold with the variable unit of machinery, the error minimize of the maximization of trip threshold adjustable extent and the trip threshold of actual trip action current value and setting can not only be realized, and comprise all have under each adjustment state under large trip threshold and little trip threshold state stable, reliable trip action performance.

To achieve these goals, the utility model have employed following technical scheme.

A kind of short-circuit protection operating current control method of multipolar electromagnetic release, the electromagnetic system 101 of described magnetictrip comprises auxiliary static iron core 18, second static iron core 21, coil 23, back-moving spring 24 and dynamic iron core 25, and at initial position, between described dynamic iron core 25 and the second static iron core 21, there is the second gap L 2, the thickness of described second gap L 2 changes in the same way with the size variation of trip threshold, the elastic force of described back-moving spring 24 is inverse change with the size variation of trip threshold, when drop-away current value is by during greatly to minor adjustment, the self-induction magnetic energy of described coil 23 reduces with quadratic relation with the electric current flow through, simultaneously, the reduction that dynamic electromagnetic attraction between iron core 25 and the second static iron core 21 is inversely proportional to the thickness of described second gap L 2 strengthens with quadratic relation, by the balance automatically reached between these two quadratic power functions, make the fixed correspondence linearly of the electromagnetic attraction needed for action of the adjustment of drop-away current value and dynamic iron core 25.

Further optimal way is: have the first gap L 1 for balancing leakage field between described dynamic iron core 25 and auxiliary static iron core 18, and the thickness of the first described gap L 1 is with the size variation of thickness of described second gap L 2, and the thickness sum L of inverse change, the first gap L 1 and the second gap L 2 remains constant.

The technical solution of the utility model also comprises a kind of short-circuit protection operating current adjusting device of multipolar electromagnetic release, it comprise each extremely public pedestal 34 and trip threshold adjusting device 103, the electromagnetic system 101 be arranged on described pedestal 34, for the coupling arrangement 102 of transmission between trip threshold adjusting device 103 and electromagnetic system 101 and the coupling bar 17 for transmitting trip action.Described electromagnetic system 101 comprises the coil rack 22 of hollow cavity, be separately fixed at the second static iron core 21 and the auxiliary static iron core 18 at the hollow cavity two ends of coil rack 22, be sleeved on the coil 23 on coil rack 22, the yoke 19 be fixedly connected with the second static iron core 21 and auxiliary static iron core 18 respectively, with can linear-movable manner is arranged on the dynamic iron core 25 in the hollow cavity of coil rack 22 and is positioned at by dynamic iron core 25 and the second static iron core 21 in coil rack 22 between the second static iron core 21 and auxiliary static iron core 18 back-moving spring 24, be separated with the second static iron core 21 for ordering about dynamic iron core 25.In the centre bore 180 of the auxiliary static iron core 18 that described coupling bar 17 is arranged on, described coupling bar 17 comprises the inner 171 of being fixedly connected with one end of dynamic iron core 25 and connects the outer end 172 of linkage with described coupling arrangement 102.The first gap L 1 is provided with between described auxiliary static iron core 18 and dynamic iron core 25, the second gap L 2 is provided with between the second described static iron core 21 and dynamic iron core 25, ordering about dynamic iron core 25 in trip threshold adjusting device 103 by coupling bar 17 moves in the process carrying out regulating, the trip threshold of described trip threshold adjusting device 103 and linking between the first described gap L 1 and second this three of gap L 2, and meeting following variation relation simultaneously: the thickness of the second gap L 2 changes in the same way with the size variation of trip threshold, the thickness of the first gap L 1 is inverse change with the size variation of the thickness of the second gap L 2, the thickness sum L of the first gap L 1 and the second gap L 2 remains constant.

Another is specifically preferably: described trip threshold adjusting device 103 comprises the support 32 be fixedly mounted on pedestal 34, be pivoted on the knob 11 on support 32, with pivotable and the mode that can move axially is arranged on draw bar 29 on pedestal 34 and micrometer adjusting screw 13, the bottom of described knob 11 is provided with gear 30, described draw bar 29 is provided with the tooth bar 31 engaged with the gear 30 on knob 11, multiple outwardly directed bar 15, multiple screwed hole 38, one for exporting snap close 37 and the reset locating surface 36 of trip action, described each bar 15 coordinates with the coupling arrangement 102 of pole, place respectively and connects, a micrometer adjusting screw 13 is installed in each screwed hole 38.

Another is specifically preferably: described coupling arrangement 102 is arranged in the yoke 19 of the electromagnetic system 101 of pole, place movably linearly by guideway, coupling arrangement 102 is provided with and connects with the outer end 172 of the coupling bar 17 of electromagnetic system 101 and the holddown groove 62 linked, to coordinate the outline of straight line face 14 that connects and contact with the micrometer adjusting screw 13 of trip threshold adjusting device 103 the curved profile face 33 coordinated with the bar 15 of trip threshold adjusting device 103, and the direction B that described coupling arrangement 102 moves linearly is parallel with the direction A of the rectilinear movement of described coupling bar 17.

Another is specifically preferably: one end of described dynamic iron core 25 and the inner 171 of coupling bar 17 are coaxially fixedly connected, the other end of dynamic iron core 25 is provided with and described inner 171 corresponding coaxial apertures 250, and the second described static iron core 21 is provided with the axial hole 210 corresponding with the coaxial aperture 250 on dynamic iron core 25.

A kind of further preferred embodiment is: one end of described back-moving spring 24 abuts and is arranged in the coaxial aperture 250 of dynamic iron core 25, and the other end of back-moving spring 24 abuts and is arranged in the axial hole 210 of the second static iron core 21.

Another kind of preferably concrete: described coupling bar 17 material therefor by trip threshold adjusting device 103 driving is preferably non-magnet material.

A kind of further preferred embodiment is: described guideway is be arranged on two positioning boss on coupling arrangement 102 16,16 ' and two guide-track grooves 39 being arranged in yoke 19.

Another further preferred embodiment is: the distribution arrangement C in described outline of straight line face 14 is vertical with the direction B that coupling arrangement 102 moves linearly, and curved profile face 33 is provided with continually varying drop H along distribution arrangement C.

The device that the short-circuit protection operating current control method of multipolar electromagnetic release of the present utility model and employing the method realize passes through coil 23, yoke 19, second static iron core 21, auxiliary static iron core 18, dynamic iron core 25, coil rack 22, the series of optimum design of the structure and parameters of the first gap L 1 between one end of dynamic iron core 25 and auxiliary static iron core 18 and the second gap L 2 between the other end of dynamic iron core 25 and the second static iron core 21, obtain trip action electric current with dynamic, the critical distance (i.e. the thickness of dynamic the second gap L 2 between iron core 25 and the second static iron core 21) of the adhesive action between static iron core, auto linear balance can be realized, make to form linear functional relation between the thickness of trip action electric current and the second gap L 2, and utilize this linear functional relation, realize the effect significantly expanding the adjustable range of trip threshold, can also significantly improve Interruption and quality of movement simultaneously, the size of the trip threshold namely no matter set, the trip action current value of circuit breaker reality is made all to have desirable precision and reliability and stability.

Accompanying drawing explanation

Fig. 1,2 is overall structure schematic diagrames of the short-circuit protection operating current adjusting device of multipolar electromagnetic release of the present utility model, and the magnetictrip shown in Fig. 1 is in large trip threshold state, and the magnetictrip shown in Fig. 2 is in little trip threshold state.

Fig. 3,4 is internal structure schematic diagrames of the short-circuit protection operating current adjusting device of multipolar electromagnetic release of the present utility model; magnetictrip shown in Fig. 3 is in large trip threshold state, and the magnetictrip shown in Fig. 4 is in little trip threshold state.

Fig. 5 is the overall structure schematic diagram of a kind of scheme of the coupling arrangement 102 of the short-circuit protection operating current adjusting device of multipolar electromagnetic release of the present utility model.

Fig. 6 is the coupling arrangement 102 of the short-circuit protection operating current adjusting device of multipolar electromagnetic release of the present utility model and the assembly structure schematic diagram of electromagnetic system 101.

Fig. 7 is the tooth bar 31 on the draw bar 29 of the trip threshold adjusting device 103 of the short-circuit protection operating current adjusting device of multipolar electromagnetic release of the present utility model and the gear 30 engaging structure schematic diagram on knob 11.

Fig. 8 is the STRUCTURE DECOMPOSITION schematic diagram that the knob 11 of the trip threshold adjusting device 103 of the short-circuit protection operating current adjusting device of multipolar electromagnetic release of the present utility model is installed with support 32 pivotable.

Embodiment

Below in conjunction with Fig. 1 to Fig. 8 for three-pole breaker, describe the short-circuit protection operating current control method of multipolar electromagnetic release of the present utility model and the embodiment of device thereof in detail, the utility model is not limited to the description of following examples.

Fig. 1,2 the three pole magnetictrips shown in overall structure schematic diagram of the utility model embodiment be parts of circuit breaker, comprise extremely public trip threshold adjusting device 103, three electromagnetic systems 101, three coupling arrangements 102 of one three extremely public pedestal 34, three and coupling bar 17, magnetictrip shown in Fig. 1 is in large trip threshold state, and the magnetictrip shown in Fig. 2 is in little trip threshold state.Three electromagnetic systems 101 are configured at three poles of circuit breaker respectively, and each electromagnetic system 101 configures a coupling arrangement 102.Pedestal 34 shown in Fig. 1,2 is also the shell block of circuit breaker, pedestal 34 is not only equipped with the parts such as electromagnetic system 101, trip threshold adjusting device 103 (see Fig. 3), but also other known parts of circuit breaker are housed, comprise the operating mechanism (not shown) of circuit breaker, termination (not shown).See Fig. 1, electromagnetic system 101 is fixed in pedestal 34, comprise conductive plate 20, conductive plate 27, yoke 19, auxiliary static iron core 18, second static iron core 21, dynamic iron core 25, spring 24, coil rack 22 and coil 23, conductive plate 20,27 and coil 23 weld together, two static iron cores 18,21 are separately fixed at the two ends of yoke 19, and limited by coil rack 22, dynamic iron core 25 is arranged in coil rack 22, can move around between two static iron cores 18,21, spring 24 is arranged in coil rack 22, is located by dynamic iron core 25 and the second static iron core 21.The wherein internal structure of a pole electromagnetic system 101 and a coupling arrangement 102 has been shown in Fig. 3,4, see Fig. 3,4, at initial position, dynamic have the first gap L 1 between iron core 25 and auxiliary static iron core 18, dynamic have the second gap L 2 between iron core 25 and the second static iron core 21, total gap L=L1+L2 and L2 > L1, dynamic iron core 25 moves between auxiliary static iron core 18 and the second static iron core 21, and total gap L remains constant.

Be linear functional relation on affecting between the elastic deformation amount of back-moving spring and its elastic force for a long time based on applicant, the magnetic field energy of solenoid is proportional to the functional relation of the quadratic power of trip action electric current, and electromagnetic attraction between dynamic iron core and static iron core and the complexity between trip action electric current is non-linear, non-triangle functional relation can not the further investigation repeatedly of factor of overall balance, it is the interaction relation that the elastic force of back-moving spring changes in the same way with trip threshold due to employing that applicant finds that the problem of existing Spring balanced model as ZL200820214752.8 patent representated by is, entirely eliminated the interaction relation of the corresponding change between magnetic gap with trip threshold, the large elastic force of the corresponding back-moving spring of namely large trip threshold, and the little elastic force of the corresponding back-moving spring of little trip threshold, and no matter trip threshold is adjusted to large or little value, dynamic, magnetic gap thickness between static iron core is constant.But objectively due to the structure function of back-moving spring, determining its large elastic force can only little magnetic gap between corresponding dynamic and static iron core, magnetic gap that can not be corresponding large, and the magnetic gap that little elastic force can only be corresponding large, magnetic gap that can not be corresponding little.Therefore, applicant thinks, the Spring balanced mistake of prior art will get rid of the interaction relation should setting up corresponding change between magnetic gap with trip threshold exactly as far as possible, and this causes the conventional design mistaken ideas of poor reliability just, the utility model just in time will be in contrast, the utility model structurally allows the thickness of the second gap L 2 can change in the same way with the size variation of trip threshold based on principle of energy balance, has a mind to establish the interaction relation that the magnetic gap between dynamic and static iron core changes in the same way with trip threshold.So-calledly to change in the same way at this, refer to the large thickness of corresponding second gap L 2 of large trip threshold, the little thickness of corresponding second gap L 2 of little trip threshold.That is, because the thickness of the second gap L 2 is less, dynamic electromagnetic attraction between iron core 25 and the second static iron core 21 is larger, the interlock variation relation that the thickness of the second gap L 2 of the present utility model changes in the same way with the size variation of trip threshold, can make the elastic force of back-moving spring with the size variation of trip threshold inverse change, the little elastic force of the corresponding back-moving spring of namely large trip threshold, and the large elastic force of the corresponding back-moving spring of little trip threshold.Specifically, self-induction magnetic energy due to helix tube type coil 23 (hereinafter referred to as " coil ") is proportional to the quadratic power of the electric current flow through in coil 23, dynamic electromagnetic attraction between iron core 25 and the second static iron core 21 is inversely proportional to the quadratic power of the thickness of the second gap L 2 between dynamic iron core 25 and the second static iron core 21, method of the present utility model is by making automatically to reach balance between these two quadratic power functions in design, the effect of following first balance model can be realized: when drop-away current value is by during greatly to minor adjustment, the self-induction magnetic energy of coil 23 reduces with quadratic relation; Meanwhile, the reduction of the second gap L 2 makes electromagnetic attraction between iron core 25 and the second static iron core 21 strengthen with quadratic relation, the fixed correspondence that both balance can make the electromagnetic attraction needed for the action of drop-away current value and dynamic iron core 25 linear.But, from the first above-mentioned balance model effect, described linear fixed correspondence be realized, also need to balance other functional relation, particularly some nonlinear functional relations relevant to coil energy and electromagnetic attraction.Dynamic magnetic gap between iron core and static iron core has leakage field, when the second gap L 2 changes, its leakage field is also along with change, and leakage field and there is complicated functional relation between coil energy and electromagnetic force, realize when setting trip threshold and becoming large, the energy quantitative change of corresponding coil 23 is large, the thickness of the second gap L 2 also becomes large simultaneously, otherwise or, when setting trip threshold and diminishing, the energy of corresponding coil 23 diminishes, the thickness of the second gap L 2 also diminishes simultaneously, method that is simple and that have an actual effect of the present utility model is the second balance model adopting balance leakage field, by increasing by first gap L 1 between dynamic iron core 25 and auxiliary static iron core 18 at initial position as leakage field link, and keep auxiliary static iron core 18 the same with the end area of the opposite end of the second static iron core 21, the effect of following second balance model can be realized: regulate in any case, total gap L=L1+L2 can remain constant, namely leakage field is constant, between the energy that the utility model has destroyed trip threshold and coil 23 purposely, (thickness of the second gap L 2 becomes large to original line balancing relation, leakage field also increases), achieve the consistent of the trip threshold of setting and the operating current value of tripping mechanism reality, so by knob and on scale can realize the desired linear smoothing change that trip threshold is regulated easily.As can be seen here, energy balance model of the present utility model not only comprises magnetic force and elastic force two balance unit, but also include multiple balance unit such as the leakage field relevant to energy, permeability, above-mentioned first and second balance models of the present utility model are the results being based upon the research and the basic theories of ingenious applied electromagnetics intergrates with practice on the new objective understanding basis to the electromagnetic principles of transient electromagnetic trip gear, overcome the prejudice of prior art understanding.

Below in conjunction with the above-mentioned short-circuit protection operating current control method of multipolar electromagnetic release realized based on principle of energy balance to the detailed description of optimizing structure of device of the present utility model, the difference made with the design based on Spring balanced principle of prior art is become clearly and easy to understand.

See Fig. 1 to Fig. 4, described electromagnetic system 101 comprises the coil rack 22 of hollow structure, be separately fixed at the second static iron core 21 and the auxiliary static iron core 18 at the hollow cavity two ends of coil rack 22, be sleeved on the coil 23 outside coil rack 22, the yoke 19 be fixedly connected with the second static iron core 21 and auxiliary static iron core 18 respectively, with can linear-movable manner is arranged on the dynamic iron core 25 in the hollow cavity of coil rack 22 and is positioned at by dynamic iron core 25 and the second static iron core 21 in coil rack 22 between the second static iron core 21 and auxiliary static iron core 18 back-moving spring 24, be separated with the second static iron core 21 for ordering about dynamic iron core 25.In the centre bore 180 of the auxiliary static iron core 18 that described coupling bar 17 is arranged on, described coupling bar 17 comprises the inner 171 of being fixedly connected with one end of dynamic iron core 25 and connects the outer end 172 of linkage with described coupling arrangement 102.The electrical construction of two conductive plates 20 and 27 at coil 23 two ends and the main circuit coupled in series of circuit breaker can adopt known structure.The yoke 19 of concave structure respectively with being fixedly connected of the second static iron core 21 and auxiliary static iron core 18, make yoke 19, second static iron core 21, assist static iron core 18, coil rack 22 and coil 23 to connect as a whole, wherein yoke 19 not only has the function of magnetic conduction, but also there is the frame function of electromagnetic system 101, by being fixedly connected of yoke 19 and pedestal 34, the location and installation of electromagnetic system 101 on pedestal 34 just can be realized.Coil 23 is sleeved on the structure on coil rack 22, make the electric current flowing through coil 23 can generate induced field in the hollow cavity of coil rack 22, known based on electromagnetic theory, when coil 23, yoke 19, second static iron core 21, auxiliary static iron core 18, the shape and structure moving iron core 25 and coil rack 22 and parameter are determined, the energy of described induced field is proportional to the quadratic power of the electric current flow through in coil 23.As mentioned above, the utility model is based on principle of energy balance, structurally create the first gap L 1 of balance leakage field, and the thickness establishing the first gap L 1 with the size variation of the thickness of the second gap L 2 inverse change, and the thickness sum of the first gap L 1 and the second gap L 2 remains constant interaction relation.Inverse change described herein refers to: when the second gap L 2 increases, the first gap L 1 reduces thereupon; On the contrary, when the second gap L 2 reduces, the first gap L 1 increases thereupon.Further illustrate this interlock variation relation below in conjunction with Fig. 3 and Fig. 4, the magnetictrip shown in Fig. 3 is in large trip threshold state, is in little trip threshold state shown in Fig. 4.The thickness being set in the first gap L 1 under Fig. 3 state is L10, the thickness of the second gap L 2 is L20, when trip threshold arrives Fig. 4 state to minor adjustment, second gap L 2 reduces (its thickness L20 ' < L20), first gap L 1 increases thereupon (its thickness L10 ' > L10), but the thickness sum of the first gap L 1 and the second gap L 2 remains constant, i.e. L10+L20=L10 '+L20 '.Obviously, by create the first gap L 1 structure and by the constant interlock variation relation of L1+L2, effectively can stop the interference of leakage field for fixed correspondence linear between trip threshold and electromagnetic force.In order to obtain the preferably fixing corresponding effect of the second balance model of balance leakage field, a kind of organization plan adopted of selecting is, one end of described dynamic iron core 25 and the inner 171 of coupling bar 17 are coaxially fixedly connected, and the other end of dynamic iron core 25 is provided with and described inner 171 corresponding coaxial apertures 250.Obviously, by setting up coaxial aperture 250, make two end areas equal and opposite in direction as far as possible at dynamic iron core 25 two ends, in other words, make participation form the end area of one end of the dynamic iron core 25 of the first gap L 1 and the end area equal and opposite in direction as far as possible of the other end of the dynamic iron core 25 of participation formation second gap L 2.In order to obtain better fixing corresponding effect further, the another kind of organization plan preferably adopted is that the second described static iron core 21 is provided with the axial hole 210 corresponding with the coaxial aperture 250 on dynamic iron core 25.Obviously, by setting up axial hole 210, make participation form the face area on the second static iron core 21 of the second gap L 2 and the face area equal and opposite in direction as far as possible on the auxiliary static iron core 18 of participation formation first gap L 1.

The utility model realizes the feature forming the Optimal Structure Designing of linear functional relation between the thickness of trip action electric current and the second gap L 2 is: in the centre bore 180 of the auxiliary static iron core 18 that described coupling bar 17 is arranged on, the inner 171 of coupling bar 17 is fixedly connected with one end of dynamic iron core 25, and the outer end 172 of coupling bar 17 connects linkage with coupling arrangement 102.Ordering about dynamic iron core 25 when trip threshold adjusting device 103 by coupling bar 17 moves in the process carrying out regulating, the trip threshold of trip threshold adjusting device 103 and link between the first described gap L 1 and second this three of gap L 2 and meet following variation relation simultaneously, that is, the thickness of the second gap L 2 changes in the same way with the size variation of trip threshold, the thickness sum of inverse change, the first gap L 1 and the second gap L 2 remains constant with the size variation of thickness of the second gap L 2 for the thickness of the first gap L 1.First gap L 1 only balances for leakage field, second gap L 2 is for realizing the balance with trip threshold, because the suction-combining force is directly proportional to the energy of coil 23, and the thickness of the energy of coil 23 and the second gap L 2 is inversely proportional to, so energy can be kept constant, as long as and energy remains unchanged, the linear relationship of described the suction-combining force and energy just remains unchanged, because the quadratic power function autobalance of the thickness of the quadratic power of drop-away current operating value and the second gap L 2, namely the size of trip threshold and the thickness size of the second gap L 2 change in the same way.

See Fig. 3, auxiliary static iron core 18 of the present utility model is made with permeability magnetic material, and auxiliary static iron core 18 provides the architectural feature that four kinds can realize difference in functionality: the first, and it is a device in magnetic circuit; Second it and yoke 19 and coil rack 22 are fixedly connected, and are the necessary connectors of the frame forming electromagnetic system 101; 3rd, it forms the first gap L 1 having and balance leakage field function together with dynamic iron core 25, and is provided with an end face of formation first gap L 1; 4th, it has the centre bore 180 that an accommodation coupling bar 17 passes, centre bore 180 and coupling bar 17 form the relation that machinery coordinates. in order to reduce the factor being unfavorable for energy balance caused by this matching relationship as far as possible, a kind of effective measures are that the material of coupling bar 17 is preferably non-magnet material.Auxiliary static iron core 18 and the following structure of coupling bar 17 also form the 3rd new balance model based on principle of energy balance: because described coupling bar 17 is arranged in the centre bore 180 of auxiliary static iron core 18, the inner 171 of coupling bar 17 is fixedly connected with one end of dynamic iron core 25, the outer end 172 of coupling bar 17 connects linkage with coupling arrangement 102, therefore, the effect of structure is accordingly, in the process regulating trip threshold, the length of coupling bar 17 in the hollow cavity of coil rack 22 (being called for short " in chamber length ") changes in the same way with the size variation of trip threshold, that is: trip threshold increases, in the chamber of coupling bar 17, length increases thereupon, trip threshold reduces, and in the chamber of coupling bar 17, length reduces thereupon.If when coupling bar 17 adopts permeability magnetic material, in its chamber, the change of length causes the volume of coupling bar 17 in the hollow cavity of coil rack 22 (being called for short " chamber inner volume ") change can cause the change of the self-induction magnetic energy of helix tube type coil 23; If coupling bar 17 adopts non-magnet material, in its chamber, the change of length causes the volume of coupling bar 17 in the hollow cavity of coil rack 22 (being called for short " chamber inner volume ") change can not cause the change of the self-induction magnetic energy of helix tube type coil 23.Permeability magnetic material is adopted as most preferred scheme coupling bar 17, but, the utility model is not got rid of coupling bar 17 and is adopted permeability magnetic material, if but adopt permeability magnetic material, the condition that the elastic force that need meet back-moving spring 24 changes in the same way with the change of the chamber inner volume of coupling bar 17, so that the balance model of the functional relation that the elastic force of the chamber inner volume and back-moving spring 24 of setting up coupling bar 17 is formed, is conducive to the fixed correspondence making the electromagnetic attraction needed for the action of drop-away current value and dynamic iron core 25 linear.Back-moving spring 24 shown in Fig. 3,4 is stage clip, and it is arranged in the middle of the second gap L 2 in the hollow cavity of coil rack 22, and the two ends of back-moving spring 24 connect with dynamic iron core 25, second static iron core 21 respectively.In order to further simplified structure, a kind of preferred scheme is, the installation of back-moving spring 24 directly can be used existing functional hole on dynamic iron core 25 and the second static iron core 21 and be realized, that is: one end of described back-moving spring 24 abuts and is arranged in the coaxial aperture 250 of dynamic iron core 25, and the other end of back-moving spring 24 abuts and is arranged in the axial hole 210 of the second static iron core 21.Here abutting is installed and is referred to the installation adopting a kind of known abutting arrangement, in coaxial aperture 250 and axial hole 210, be such as respectively equipped with the step abutted, back-moving spring 24 is arranged in hole (coaxial aperture 250, axial hole 210), the end of back-moving spring 24 abuts with step simultaneously, to limit the axis of back-moving spring 24 and to move radially.Compared with prior art, the advantage of the spring mounting structure of above-described embodiment is apparent, it not only simplify structure, and make the elastic force of back-moving spring 24 and electromagnetic attraction on same position, overcome the deficiency that to there is angle between existing patent elastic force action direction and dynamic iron core moving direction and exist, namely must add in elastic force transfer chain and the sliding pair that minor axis and sliding tray be made up of of the direction of motion perpendicular to the dynamic iron core direction of motion is set.Certainly, the utility model is not got rid of in the hollow cavity that adopts and back-moving spring is arranged on coil rack or is adopted the alternative scheme of spring of extension spring or other types.

As shown in Figure 3,4; the short-circuit protection operating current adjusting device of multipolar electromagnetic release of the present utility model; with regard to mechanical structure, it is relevant to operating mechanism; with regard to circuit structure, it is relevant to termination; specifically: its snap close 37 exporting trip action coordinates with the trip(ping) bar of operating mechanism and connects, with the trip action energy Direct driver circuit breaker trip by snap close 37.As the transient electromagnetic release that trip threshold is adjustable, under normal circumstances, coil 23 coupled in series of its electromagnetic system 101 is in the main circuit of a pole of circuit breaker, namely coupled in series is between the input wires device and output connection device of a pole of circuit breaker, when the electric current flow through in coil 23 meets or exceeds trip action current threshold (hereinafter referred to as " trip threshold ") of setting, the dynamic iron core 25 of electromagnetic system 101 produces trip action, this trip action passes to the snap close 37 of trip threshold adjusting device 103 by coupling bar 17 and coupling arrangement 102.Any one generation trip action in three electromagnetic systems 101 all can cause circuit breaker tripping to trip.See Fig. 1 to 4 and Fig. 7 and 8, described trip threshold adjusting device 103 comprises the support 32 be fixedly mounted on pedestal 34, be pivoted on the knob 11 on support 32, draw bar 29 and micrometer adjusting screw 13, knob 11 regulates the trip threshold of three electromagnetic systems 101 simultaneously, the bottom of knob 11 is provided with gear 30, draw bar 29 is with pivotable and the mode that can move axially is arranged on pedestal 34, draw bar 29 is provided with a tooth bar 31 that can engage with the gear 30 on knob 11, multiple outwardly directed bar 15, multiple screwed hole 38, one for exporting snap close 37 and the reset confined planes 36 of trip action, wherein each bar 15 coordinates with the coupling arrangement 102 of pole, place respectively and connects, in each screwed hole 38, a micrometer adjusting screw 13 is installed, described reset confined planes 36 coordinates with pedestal 34, restriction draw bar 29 rotates clockwise in the reset state, for draw bar 29 provides stable reset mode." coordinate and connect " described here refers to a kind of connection comprising contact and coordinate and be separated cooperation, specifically see Fig. 3,4: in the reset state, bar 15 does not contact with the outline of straight line face 14 of coupling arrangement 102, thus the shift motion for regulating trip threshold to reserve coupling arrangement 102; In dropout process, the mobile outline of straight line face 14 that drives of coupling arrangement 102 is moved, and outline of straight line face 14 is contacted with bar 15, then by outline of straight line face 14 drive rod 15 action.Knob 11 is pivoted on structure on support 32 as shown in Figure 8, it comprise coaxially to be arranged on support 32 two perforates 63,64, be coaxially arranged on the recessed shaft part 61,62 of on knob 11 two, described two shaft parts 61 and 62 are arranged in two perforates 63 and 64 respectively, to form the revolute pair mechanism of the pivotable installation realizing knob 11.Draw bar 29 structure be arranged on pedestal 34 can adopt the supporting structure of known rotation axis, and this structure has the effect of restriction 4 degrees of freedom to draw bar 29, only allows draw bar 29 to still have and rotates and move axially 2 degrees of freedom.When turning knob 11, the gear 30 of the bottom of the knob 11 shown in Fig. 8 drives the tooth bar 31 on the draw bar 29 shown in Fig. 7, and draw bar 29 is moved axially.When inputting an action from bar 15 or snap close 37, bar 15 or snap close 37 drive draw bar 29 to rotate, and the rotation of draw bar 29 realizes linking around axle of bar 15 and snap close 37.Micrometer adjusting screw 13 shown in Fig. 3 and the screwed hole shown in Fig. 8 38 match and arrange, and its quantity is equal with the number of poles of circuit breaker.Snap close 37 is coordinated by the trip(ping) bar of the operating mechanism with circuit breaker and connects, and it is exported to described trip(ping) bar around the trip action that draw bar 29 rotates, and the structure that described cooperation connects is conventional structure.The top end face of knob 11 is provided with regulating tank 35, regulating tank 35 is arrowhead form as shown in Figure 8, the mark (not shown) of instruction trip threshold is provided with in the region corresponding with arrow of the outer surface of pedestal 34, during turning knob 11, described arrow can point to the mark of different trip threshold.Regulating tank 35 can supply instrument (such as screwdriver and so on) insertion to rotate with drive knob 11.

See Fig. 1 to 6, described coupling arrangement 102 is arranged in the yoke 19 of the electromagnetic system 101 of pole, place movably linearly by guideway, coupling arrangement 102 be provided with to connect with the outer end of the coupling bar 17 of electromagnetic system 101 and the holddown groove 62 linked, with the bar 15 of trip threshold adjusting device 103 coordinate connect outline of straight line face 14, contact with the micrometer adjusting screw 13 of trip threshold adjusting device 103 the curved profile face 33 coordinated, the direction B that coupling arrangement 102 moves linearly is parallel with the direction A of the rectilinear movement of coupling bar 17.Cooperation described herein connects with aforementioned implication, and described " contact coordinates " refers to and a kind ofly comprise the cooperation be contacting and separating, concrete composition graphs 4,5: in the reset state, and curved profile face 33 contacts with the micrometer adjusting screw 13 of trip threshold adjusting device 103; In dropout process, the movement of coupling arrangement 102 drives curved profile face 33 and outline of straight line face 14 to move down simultaneously, curved profile face 33 is separated with micrometer adjusting screw 13, and then outline of straight line face 14 contacts with bar 15, then by outline of straight line face 14 drive rod 15 action; In reseting procedure, the movement of coupling arrangement 102 drives curved profile face 33 and outline of straight line face 14 to move up simultaneously, outline of straight line face 14 is separated with bar 15, then curved profile face 33 contacts with micrometer adjusting screw 13, then drives micrometer adjusting screw 13 by curved profile face 33 and drive draw bar 29 to reset.Described guideway is two positioning boss 16,16 ' (see Fig. 5) be arranged on coupling arrangement 102 and two guide-track grooves 39 (see Fig. 6) be arranged in yoke 19, two positioning boss 16,16 ' are arranged in two guide-track grooves 39 respectively, guide-track groove 39 is straight-line groove, to realize the movable linearly of coupling arrangement 102.See Fig. 5, the distribution arrangement C in described outline of straight line face 14 is vertical with the direction B that coupling arrangement 102 moves linearly, and curved profile face 33 is provided with continually varying drop H along distribution arrangement C.Described holddown groove 62 realizes connecting with the T-shaped styletable of the outer end 172 of coupling bar 17, and coupling arrangement 102 and coupling bar 17 are linked.Should understand, there is the holddown groove 62 connecting linkage and be different from sliding tray disclosed in ZL200820214752.8 patent completely, do not have slip cooperating relationship between coupling bar 17 and holddown groove 62, therefore there is not the various known defect that sliding tray structure causes in it.

The process of the trip threshold adjustment operation of the short-circuit protection operating current adjusting device of multipolar electromagnetic release of the present utility model is described below in conjunction with Fig. 1 to 4.Under the state shown in Fig. 1 and 2, operation knob 11 rotates to the direction that trip threshold is little, gear 30 drives the tooth bar 31 on draw bar 29, draw bar 29 is made to move right to the position shown in Fig. 4 in position as shown in Figure 1, slide to the right in the top of micrometer adjusting screw 13 on the curved profile face 33 of coupling arrangement 102 simultaneously, and drive coupling arrangement 102 to be moved down into the position shown in Fig. 4 in position as shown in Figure 1, coupling arrangement 102 drives coupling bar 17 and dynamic iron core 25 to be moved down into the position shown in Fig. 4 in position as shown in Figure 1 simultaneously, the less thick of the second gap L 2 is made to be L20 ', the thickness of the first gap L 1 increases to L10 ', the height step-down of back-moving spring 24 simultaneously, elastic force increases.Otherwise under the state shown in Fig. 3 and 4, operation knob 11 is rotated to large direction to trip threshold by little, and each action piece just can be made to get back to the state shown in Fig. 1 and 2.

The trip action process of the short-circuit protection operating current adjusting device of multipolar electromagnetic release of the present utility model is further illustrated below in conjunction with Fig. 1 to 4.When the electric current flowing through coil 23 meets or exceeds the trip threshold of setting, the elastic force that dynamic iron core 25 caused by the self-induction magnetic energy of coil 23 and the electromagnetic attraction between the second static iron core 21 overcome back-moving spring 24 moves to the second static iron core 21 direction, until dynamic iron core 25 and the second static iron core 21 adhesive, the mobile coupling bar 17 that drives of dynamic iron core 25 moves down, moving down of coupling bar 17 drives coupling arrangement 102 to move down, moving down of coupling arrangement 102 drives the outline of straight line face 14 on it to move down, outline of straight line face 14 contacts with the bar 15 on the draw bar 29 of trip threshold adjusting device 103 and coordinates, outline of straight line face 14 move down drive rod 15, thus drive draw bar 29 to do the rotation of counterclockwise (rotation direction as shown in Figures 3 and 4), rotating counterclockwise of draw bar 29 drives snap close 37 to rotate counterclockwise, rotating counterclockwise of snap close 37 causes operating mechanism to be threaded off, circuit breaker trip.After circuit breaker trip, electric current in coil 23 is 0, coil 23 loses magnetic energy, dynamic iron core 25 and the second static iron core 21 lose electromagnetic attraction, dynamic iron core 25 moves up under the elastic force effect of back-moving spring 24, moving up of dynamic iron core 25 drives coupling bar 17 and coupling arrangement 102 to reset, the reset of coupling arrangement 102 drives the curved profile face 33 on it to move up, moving up of curved profile face 33 drives the micrometer adjusting screw 13 on draw bar 29 to move up, moving up of micrometer adjusting screw 13 drives draw bar 29 to rotate clockwise, until the confined planes 36 on draw bar 29 is subject to the restriction of pedestal 34, electromagnetic system 101, coupling arrangement 102 enters stable reset mode with the movement parts relevant to trip action on draw bar 29 and motive position.

The trim process of the initial trip threshold of the adjustable magnetictrip of trip threshold of the present utility model is further illustrated: in the reset state below in conjunction with Fig. 1 to 4, operation micrometer adjusting screw 13 makes it rotate, moving up and down of fine-tuning coupling arrangement 102, to realize the consistency of the actual trip action current value between the consistency of the trip threshold of initial actual trip action current value and setting and each pole.Owing to have employed principle of energy balance, to make between the actual trip action current value of each pole and the trip threshold of setting corresponding has higher precision, therefore, as long as initial actual trip action current value is consistent with the trip threshold of setting, can ensure under different trip threshold states, corresponding between the actual trip action current value of each pole and the trip threshold of setting all has higher precision.

It is to be understood that the various embodiments described above are just to explanation of the present utility model, instead of to restriction of the present utility model, any utility model do not exceeded in the utility model spirit is created, and all falls within protection range of the present utility model.Such as, the embodiment that Fig. 1 to Fig. 8 provides is not limited to the situation of three poles, its number of poles is consistent with the electromagnetic system 101 be arranged on pedestal 34 and the configuration quantity for the coupling arrangement 102 of transmission between trip threshold adjusting device 103 and electromagnetic system 101, and pedestal 34 and trip threshold adjusting device 103 are public.

Claims (8)

1. the short-circuit protection operating current adjusting device of a multipolar electromagnetic release; comprising each extremely public pedestal (34) and trip threshold adjusting device (103), the electromagnetic system (101) be arranged on described pedestal (34), for the coupling arrangement (102) of transmission between trip threshold adjusting device (103) and electromagnetic system (101) and the coupling bar (17) for transmitting trip action, it is characterized in that:

Described electromagnetic system (101) comprises the coil rack (22) of hollow cavity, be separately fixed at the second static iron core (21) and the auxiliary static iron core (18) at the hollow cavity two ends of coil rack (22), be sleeved on the coil (23) on coil rack (22), the yoke (19) be fixedly connected with the second static iron core (21) and auxiliary static iron core (18) respectively, so that can dynamic iron core (25) in the hollow cavity of coil rack (22) be arranged on and be positioned at the back-moving spring (24) in coil rack (22) by dynamic iron core (25) and the second static iron core (21) by linear-movable manner between the second static iron core (21) and auxiliary static iron core (18), be separated with the second static iron core (21) for ordering about dynamic iron core (25),

In the centre bore (180) of the auxiliary static iron core (18) that described coupling bar (17) is arranged on, described coupling bar (17) comprises the inner (171) be fixedly connected with one end of dynamic iron core (25) and the outer end (172) connecting linkage with described coupling arrangement (102);

The first gap L 1 is provided with between described auxiliary static iron core (18) and dynamic iron core (25), the second gap L 2 is provided with between described the second static iron core (21) and dynamic iron core (25), ordering about dynamic iron core (25) movement in trip threshold adjusting device (103) by coupling bar (17) carries out in the process regulated, the trip threshold of described trip threshold adjusting device (103) and linking between the first described gap L 1 and second this three of gap L 2, and meeting following variation relation simultaneously: the thickness of the second gap L 2 changes in the same way with the size variation of trip threshold, the thickness of the first gap L 1 is inverse change with the size variation of the thickness of the second gap L 2, the thickness sum L of the first gap L 1 and the second gap L 2 remains constant.

2. the short-circuit protection operating current adjusting device of multipolar electromagnetic release according to claim 1, it is characterized in that: described trip threshold adjusting device (103) comprises the support (32) be fixedly mounted on pedestal (34), be pivoted on the knob (11) on support (32), with pivotable and the mode that can move axially is arranged on draw bar (29) on pedestal (34) and micrometer adjusting screw (13), the bottom of described knob (11) is provided with gear (30), described draw bar (29) is provided with the tooth bar (31) engaged with the gear (30) on knob (11), multiple outwardly directed bar (15), multiple screwed hole (38), one for exporting snap close (37) and the reset locating surface (36) of trip action, each bar in described multiple outwardly directed bar (15) coordinates with the coupling arrangement (102) of pole, place respectively and connects, a micrometer adjusting screw (13) is installed in each screwed hole (38).

3. the short-circuit protection operating current adjusting device of multipolar electromagnetic release according to claim 1, it is characterized in that: described coupling arrangement (102) is arranged in the yoke (19) of the electromagnetic system (101) of pole, place movably linearly by guideway, coupling arrangement (102) is provided with and connects and the holddown groove (62) linked with the outer end of the coupling bar of electromagnetic system (101) (17) (172), coordinate with the bar (15) of trip threshold adjusting device (103) the outline of straight line face (14) that connects and contact with the micrometer adjusting screw (13) of trip threshold adjusting device (103) the curved profile face (33) coordinated, the direction B that described coupling arrangement (102) moves linearly is parallel with the direction A of the rectilinear movement of described coupling bar (17).

4. the short-circuit protection operating current adjusting device of multipolar electromagnetic release according to claim 1; it is characterized in that: one end of described dynamic iron core (25) and the inner (171) of coupling bar (17) are coaxially fixedly connected; the other end of dynamic iron core (25) is provided with the coaxial aperture (250) corresponding with described the inner (171), and described the second static iron core (21) is provided with the axial hole (210) corresponding with the coaxial aperture (250) on dynamic iron core (25).

5. the short-circuit protection operating current adjusting device of the multipolar electromagnetic release according to claim 1 or 4; it is characterized in that: one end of described back-moving spring (24) abuts and is arranged in the coaxial aperture (250) of dynamic iron core (25), the other end of back-moving spring (24) abuts and is arranged in the axial hole (210) of the second static iron core (21).

6. the short-circuit protection operating current adjusting device of multipolar electromagnetic release according to claim 1, is characterized in that: the described coupling bar (17) driven by described trip threshold adjusting device (103) is non-magnet material.

7. the short-circuit protection operating current adjusting device of multipolar electromagnetic release according to claim 3, is characterized in that: described guideway is two positioning boss (16,16 ') be arranged on coupling arrangement (102) and two guide-track grooves (39) be arranged in yoke (19).

8. the short-circuit protection operating current adjusting device of multipolar electromagnetic release according to claim 3; it is characterized in that: the distribution arrangement C in described outline of straight line face (14) is vertical with the direction B that coupling arrangement (102) moves linearly, and curved profile face (33) are provided with continually varying drop H along distribution arrangement C.