CN203351533U

CN203351533U - Double-action electromagnetic release

Info

Publication number: CN203351533U
Application number: CN 201320428543
Authority: CN
Inventors: 潘友义
Original assignee: Zhejiang Chint Electrics Co Ltd
Current assignee: Zhejiang Chint Electrics Co Ltd
Priority date: 2013-07-16
Filing date: 2013-07-16
Publication date: 2013-12-18
Anticipated expiration: 2023-07-16

Abstract

Provided is a double-action electromagnetic release. A head portion of a push rod is slidably arranged in a first supporting hole of a static iron core and extends out of the first supporting hole. Current coils are sleeved on a first framework which is arranged in a magnet yoke and is accommodated with a first reaction spring and a first moveable iron core. The two ends of the first reaction springs abut in a first spring accommodating hole of the first moveable iron core and a supporting portion of the first framework respectively. The first moveable iron core and the tail portion of the push rod are in association operation. The first moveable iron core is driven by the short circuit action current magnetic field of the current coils to overcome the elastic force of the first reaction spring and to push the push rod to move. Voltage coils are sleeved on a second framework which is accommodated with a second reaction spring and the static iron core. The two ends of the second reaction spring are connected with a limitation step of the push rod and the static iron core respectively. A second moveable iron core is arranged in an accommodation area formed by the butt joint of the two frameworks through a line movement pair structure and is in contact cooperation with the limitation step of the push rod. The second moveable iron core is driven by the action current magnetic field of the voltage coils to push the push rod to move by overcoming the elastic force of the second reaction spring.

Description

Two action magnetictrips

Technical field

The utility model relates to magnetictrip, and it is mainly used in the mini-type residual current actuated breaker of modularization, has residual current, over load defencive function.

Background technology

Residual current action breaker has the magnetictrip that two covers can produce the action of threading off, and wherein a set of is the short circuit instantaneous release, and another set of is residual current trip, and the former is a kind of current mode magnetictrip, and the latter is a kind of voltage-type magnetictrip.This two covers magnetictrip need take very large space, makes the volume of single circuit breaker larger, and the space in its shared distribution box is larger, and it is just fewer that distribution box holds the quantity that circuit breaker is installed.For this reason, in rated current to 40A, rated voltage is no more than the mini-type residual current actuated breaker used in the circuit of 240V, mostly adopt the short circuit instantaneous release is arranged in breaker body at present, using residual current trip as separate unit and the form that assembles of the breaker body of modularization, breaker body and residual current trip are respectively that a modulus is wide, the current coil of short circuit instantaneous release is distributed in circuit breaker, and potential winding is distributed in residual current trip, thereby making residual current action breaker is that two moduluses are wide, volume is large.

In prior art earlier, people are by the push rod of current mode magnetictrip is connected with the push rod of voltage-type magnetictrip butt or the mode of acting in conjunction on same trip(ping) bar, and by two, independently current mode magnetictrip and voltage-type magnetictrip are combined by the mode connected in series or in parallel of machinery.Although the mode of this simple combination can directly be compressed in miniature circuit breaker by residual current trip, but and fail to save the space of current mode magnetictrip and voltage-type magnetictrip, the volume of circuit breaker can not be effectively reduced, and trouble or the difficulty of the component layouts design of circuit breaker can be brought.For this reason, in recent years, the two action magnetictrips that have the action of short circuit instantaneous trip and residual current dropout action concurrently come out successively.For example a kind of known two action magnetictrips have 1 moving iron core, and the residual current driving voltage in potential winding, the short circuit exciting current in current coil cause same moving iron core action.Its defect is: the one, due to the same moving iron core in potential winding and the shared same road of current coil magnetic system, so the magnetic picture that the magnetic force that needs the residual current driving voltage in potential winding to produce and the short circuit exciting current in current coil produce is worked as; The 2nd, because potential winding is enclosed within on this moving iron core one end or yoke, so leakage field is serious; The 3rd, due to the impact of leakage field and shared same moving iron core, potential winding and control circuit must bear very high voltge surge, must mate very high operating voltage simultaneously.Another kind of two action magnetictrip product has 2 moving iron cores and 2 yokes, by static iron core, the first yoke, the first moving iron core forms a magnetic loop, by the first moving iron core, the second moving iron core, the second yoke forms another magnetic loop, current coil, potential winding is respectively in above-mentioned two different magnetic loops, when in circuit, the large short circuit current of generation makes current coil produce enough large excitation field, the first moving iron core is under the effect of this excitation field, drive by the spacing ring on push rod the resistance exercise that push rod overcomes Compress Spring, pushing mechanism is threaded off, when enough large residual current is arranged in circuit, control circuit will the turn-on voltage coil circuit, make the potential winding two ends load sufficiently high voltage, potential winding produces enough large excitation field, make the direction motion to the first moving iron core under the effect of this excitation field of the second moving iron core, promote the resistance exercise that push rod overcomes Compress Spring, pushing mechanism is threaded off.The defect of this product is: because short circuit instantaneous trip action and residual current are threaded off to move and all must be overcome the resistance of same Compress Spring, during i.e. two moving iron core actions, it is the counter-force that overcomes same spring, so potential winding and residual current control circuit can not be common to the circuit breaker of different rated current In, and make potential winding and control circuit bear very high voltge surge, potential winding and control circuit must mate very high operating voltage, this is because the operating voltage of potential winding must be relevant to short circuit instantaneous trip current threshold, and short circuit instantaneous trip current threshold must be relevant to the rated current In of circuit breaker, generally, 3-5 times of the rated current In that short circuit instantaneous trip current threshold is circuit breaker, and in order to ensure in the situation that the electric current of current flowing coil is less than short circuit instantaneous trip current threshold magnetictrip is failure to actuate, so, the elastic force of Compress Spring is had to design very greatly, for the elastic force that overcomes Compress Spring has to improve the operating voltage (being generally upper hectovolt) of potential winding.Simultaneously; for solving the outstanding problem of voltge surge; have to increase the coil that can resist voltge surge in protective circuit; and because the leakage field problem due to magnetic structure unreasonable is serious; for making potential winding produce enough large excitation field, so have to improve the operating voltage of potential winding, the volume of potential winding is large; also need in the magnetic circuit of potential winding, for potential winding, set up yoke simultaneously, from and increased the volume of magnetictrip.

The utility model content

The utility model addresses these problems and provides a kind of two action magnetictrip, can greatly reduce the spring counter-force that residual current dropout action overcomes, solved the problem of existing two action insecure problems of the existing residual current protecting of magnetictrip and high-voltage impact when low-voltage, make the operating voltage of potential winding be down to tens volts (as low pressure of 50V grade) by original upper hectovolt, make the magnetictrip of different rated current can use same potential winding and residual current dropout control circuit, the structure that not only makes magnetictrip is advantages of simple more, and can omit yoke in the potential winding magnetic circuit and the device of the resistance high-voltage impact in residual current dropout control circuit, reduce the cost of magnetictrip, obviously reduced the volume of magnetictrip, more can take full advantage of the distribution box space, but also effectively overcome the leakage field problem, reliable operation.

For achieving the above object, the utility model has adopted the technical scheme of following two action magnetictrips: it comprises current coil 4, potential winding 6, static iron core 7, cover plate 30, the first moving iron core 1, the second moving iron core 5 and the push rod 10 of threading off for pushing mechanism, it is characterized in that described static iron core 7 is provided with the first support holes 71, described push rod 10 comprises head 101, afterbody 102 and be arranged on head 101 and afterbody 102 between limited step 103, the head 101 of this push rod 10 is arranged in the first support holes 71 in the mode be slidably matched, and reach outside this hole through the first support holes 71.Described current coil 4 is sleeved on the first skeleton 2, the first skeleton 2 is arranged in yoke 20, the first reaction spring 3 and cover plate 30 and the first moving iron core 1 are equipped with in being installed in chamber of the first skeleton 2, the first spring that one end of described the first reaction spring 3 is connected to the first moving iron core 1 is installed in hole, its other end is connected with the support portion 21 of the first skeleton 2, the described first moving iron core 1 is arranged on being installed in chamber of the first skeleton 2 in the mode of traveling priority, and coordinate with the operation associated end in contact of the afterbody 102 of described push rod 10, the first moving iron core 1 is subject to the field drives of the short circuit operating current of current coil 4, the elastic force that overcomes the first reaction spring 3 promotes push rod 10 and moves.Described potential winding 6 is sleeved on the second skeleton 8, the second reaction spring 9 and static iron core 7 are equipped with in being installed in chamber of the second skeleton 8, the two ends of described the second reaction spring 9 are connected with limited step 103, the static iron core 7 of push rod 10 respectively, the described second moving iron core 5 is arranged on by the first skeleton 2 and the formed housing region of the second skeleton 8 docking by the traveling priority auxiliary structure, and contact cooperation with the limited step 103 of push rod 10, the second moving iron core 5 is subject to the field drives of the operating current of potential winding 6, and the elastic force that promotion push rod 10 overcomes the second reaction spring 9 moves.

According to another feature, in the container cavity of described the first skeleton 2, be provided with first be installed in hole 23 and with first be installed in that hole 23 connects second be installed in hole 24, be provided with the 3rd in the container cavity of described the second skeleton 8 and be installed in hole 81, described static iron core 7 is fixed on the 3rd of the second skeleton 8 and is installed in 81 outer end, hole, first of described the first skeleton 2 is installed in hole 23 and is installed in hole 81 with the 3rd of the second skeleton 8 and docks and connect, and is installed in hole 23, second by first and is installed in hole 24 and the 3rd and is installed in hole 81 and jointly forms the slideway that the described push rod 10 of the permission run through is slidably installed; Described support portion 21 is arranged on first of the first skeleton 2 and is installed in hole 23 and second and is installed between hole 24, and support portion 21 is provided with and connects first and be installed in the second support holes 22 that hole 23 and second is installed in hole 24; The described first moving iron core 1 is arranged on second in the mode of traveling priority and is installed in hole 24, the described second moving iron core 5 is slidably mounted on first of perforation and is installed in hole 23 and the 3rd and is installed in hole 81, described traveling priority auxiliary structure is that the second moving iron core 5 and described first is installed in hole 23/ or the 3rd and is installed in hole 81 and is slidably matched, and, all promote same push rod (10) and onrelevant operation when the described second moving iron core 5 and the first moving iron core 1 action.

According to another specific features, the head 101 of described push rod 10 is positioned at the 3rd of the second skeleton 8 and is installed in hole 81, and it touches the top that termination is arranged on head 101; The head 101 of described push rod 10 reaches the 3rd through the first support holes 71 and is installed in outside hole 81; The afterbody 102 of described push rod 10 runs through first of the first skeleton 2 and is installed in hole 23, second and is installed in the 3rd of hole 24 and the second skeleton 8 and is installed in hole 81, the afterbody 102 of described push rod 10 passes from described the second support holes 22, and, described afterbody 102 and the second support holes 22 are slidably matched, and the described end that contacts the afterbody 102 coordinated with the first moving iron core 1 is positioned at first and is installed in hole 23; The limited step 103 that contacts cooperation with the second moving iron core 5 of described push rod 10 is positioned at the 3rd of the second skeleton 8 and is installed in hole 81.

According to another specific features, the described first moving iron core 1 comprises cylindricality core body 11 and is formed in the transmission end face 12 on cylindricality core body 11, the first spring of the described first moving iron core 1 is installed in hole and is formed on described cylindricality core body 11, for an end of the first reaction spring 3 is installed, the transmission end face 12 of the first moving iron core 1 is arranged on the bottom that described the first spring is installed in hole, second of described cylindricality core body 11 and the first skeleton 2 is installed in hole 24 and is slidably matched, described transmission end face 12 contacts cooperation with the end of the afterbody 102 of push rod 10, and coordinate to push rod 10 and transmit short circuit current dropout action by this contact.

According to another specific features, described the first reaction spring 3 is installed in hole 24 and is enclosed within outside the afterbody 102 of push rod 10 in second of the first skeleton 2, and the end that first spring that is connected to the first moving iron core 1 of described the first reaction spring 3 is installed in hole is connected with the transmission end face 12 of the first moving iron core 1.

According to another specific features, described the second reaction spring 9 is installed in hole 81 and is enclosed within outside the head 101 of push rod 10 in the 3rd of the second skeleton 8.

According to another feature, the described second moving iron core 5 is provided with through hole 51, the first end face 52 and the second end face 53 on the afterbody 102 that is sleeved on push rod 10, described the first end face 52 contacts cooperation with the support portion 21 of the first skeleton 2, while by the moving iron core 5 of this contact engagement limits second, in current coil 4, short circuit current being arranged, can not move; Described the second end face 53 contacts cooperation with the limited step 103 of push rod 10, and coordinates to push rod 10 and transmit residual current dropout action by this contact.Further, the through hole 51 that described traveling priority auxiliary structure is the second moving iron core 5 is slidably matched with the afterbody 102 of push rod 10.

According to another feature, described static iron core 7 is provided with the second spring and is installed in hole 72, described the second spring is installed in the concentric setting of the first support holes 71 on hole 72 and static iron core 7, the diameter that the second spring is installed in hole 72 is greater than the first support holes 71 and is installed between hole 72 and the first support holes 71 and forms step at the second spring, and an end of the second reaction spring 9 is arranged on the second spring and is installed in hole 72 and is connected on described step.

According to another feature, the counter-force of described the first reaction spring 3 is greater than the second reaction spring 9.

The existing two action magnetictrips that simultaneously there is the action of short circuit instantaneous trip and residual current dropout action, too high and the serious defect of high-voltage impact of the operating voltage of ubiquity potential winding, this defect causes the decline in useful life of potential winding and control circuit thereof and the raising of production cost, simultaneously, high voltage also brings the infringement to other parts, need to increase size and the safe insulation distance of potential winding, the components and parts such as coil that even also need additional antagonism high-voltage impact, thereby cause the complicated of structure and be unfavorable for the problem such as Miniaturization Design.There be overlapping conflicting in the position of the electromagnetic tripping apparatus of the residual current trip separate unit that the utility model is larger for volume with the magnetictrip in breaker body, adopt two independently reaction spring structure and two magnetic circuit docking structures independently, and the dependency structure parameter can require independent design according to global optimization respectively, the spring counter-force that the short circuit instantaneous trip action of the moving iron core of current coil is overcome and the residual current of the moving iron core of potential winding are threaded off and are moved the spring counter-force that overcomes respectively from two different reaction springs, significantly reducing of the spring counter-force that residual current dropout action is overcome, the decrease of the operating voltage of potential winding, so can omit the device of yoke in the potential winding magnetic circuit and the resistance high-voltage impact in residual current dropout control circuit as antagonism high-voltage impact coil, solved the problem of existing two action insecure problems of the existing residual current protecting of magnetictrip and high-voltage impact when low-voltage.Due to the operating voltage of potential winding of the present utility model and the rated current In of circuit breaker, the short circuit instantaneous trip current threshold of current coil is irrelevant, the magnetictrip of different rated current can be used same potential winding and residual current dropout control circuit, efficiently solve the problem that short circuit instantaneous release and residual current trip unite two into one, the structure that not only makes magnetictrip is advantages of simple more, reduce as far as possible number of components, be conducive to the miniaturization of the less and residual current action breaker of the volume of magnetictrip itself, wide to be reduced to 1 modulus wide by 2 original moduluses for the width dimensions that makes to adopt circuit breaker of the present utility model, solved the wide problem of width that causes circuit breaker because existing magnetictrip volume is excessive, but also effectively improved magnetic circuit leakage field problem, the operating voltage of potential winding is no longer because can independently being set by tying down of short circuit instantaneous trip current threshold, residual current dropout action and the action of short circuit instantaneous trip no longer overcome the elastic force from same Compress Spring, so potential winding and residual current control circuit can be common to the circuit breaker of different rated current In.And the utility model utilizes the length of breaker body, high size redundancy, add under the prerequisite of width size not increasing width dimensions or reduce, the current transformer of residual current trip separate unit is compressed in breaker body, simultaneously, realize omitting the external cabling device of residual current trip separate unit special use by this compression scheme.The utility model is also avoided producing new problem and need to be newly increased the parts support or increase technical difficulty for solving these new problems.

The accompanying drawing explanation

Fig. 1 is the overall structure floor map illustrated according to two action magnetictrips of the present utility model.

Fig. 2 is the structural plan schematic diagram that specifically illustrates the skeleton component be comprised of the first skeleton 2, the second skeleton 8, and the first skeleton 2 shown in figure and the second skeleton 8 are the split part.

Fig. 3 is the structural plan schematic diagram that static iron core 7 parts shown in Fig. 1 more specifically are shown.

Fig. 4 is the structural plan schematic diagram that push rod 10 parts shown in Fig. 1 more specifically are shown.

Fig. 5 is the structural plan schematic diagram that moving iron core 5 parts of second shown in Fig. 1 more specifically are shown.

Fig. 6 is the structural plan schematic diagram that moving iron core 1 part of first shown in Fig. 1 more specifically is shown.

Embodiment

Below in conjunction with the accompanying drawing 1 to 6 only provided for the example purpose, further illustrate the embodiment of two action magnetictrips of the present utility model, so that other advantage of the present utility model and feature become and are easier to understand by detailed description.

Being the first skeleton 2 in being arranged on yoke 20 and being arranged on the current coil 4 on this coil rack shown in the overall structure floor map of Fig. 1, the second skeleton 8 and be arranged on the potential winding 6 on this coil rack, the first moving iron core 1, the second moving iron core 5, static iron core 7, the first reaction spring 3, the second reaction spring 9, of the present utility model two action magnetictrips that push rod 10 and cover plate form, this magnetictrip adopts two independently reaction spring structure and two magnetic circuit docking structures independently, and current coil and potential winding are distributed in different magnetic loops, overcome different spring counter-forces when the first moving iron core and the second moving iron core action, guaranteed the reliability of short-circuit protection and residual current protecting.Specifically, this pair of action magnetictrip comprises current coil 4, potential winding 6, static iron core 7, moving iron core the 1, the second moving iron core 5 of cover plate 30, first and the push rod 10 of threading off for pushing mechanism, described static iron core 7 is provided with the first support holes 71, described push rod 10 comprise head 101, afterbody 102 and be arranged on head 101 and afterbody 102 between limited step 103, the head 101 of this push rod 10 is arranged in the first support holes 71 in the mode be slidably matched, and reaches outside this hole through the first support holes 71.Described current coil 4 is sleeved on the first skeleton 2, the first skeleton 2 is arranged in yoke 20, the first reaction spring 3 and cover plate 30 and the first moving iron core 1 are equipped with in being installed in chamber of the first skeleton 2, the first spring that one end of described the first reaction spring 3 is connected to the first moving iron core 1 is installed in hole, its other end is connected with the support portion 21 of the first skeleton 2, the described first moving iron core 1 is arranged on being installed in chamber of the first skeleton 2 in the mode of traveling priority, and coordinate with the operation associated end in contact of the afterbody 102 of described push rod 10, the first moving iron core 1 is subject to the field drives of the short circuit operating current of current coil 4 to overcome the first reaction spring 3 elastic force to promote push rods 10 and move.Described potential winding 6 is sleeved on the second skeleton 8, the second reaction spring 9 and static iron core 7 are equipped with in being installed in chamber of the second skeleton 8, the two ends of described the second reaction spring 9 are connected with limited step 103, the static iron core 7 of push rod 10 respectively, the described second moving iron core 5 is arranged on by the first skeleton 2 and the formed housing region of the second skeleton 8 docking by the traveling priority auxiliary structure, and contacting cooperation with the limited step 103 of push rod 10, the second moving iron core 5 is subject to the field drives of the operating current of potential winding 6 to promote push rod 10 to overcome the second reaction spring 9 elastic force and move.The utility model does not arrange separately in potential winding 6 these sides another yoke that adds strong suction, because the utility model potential winding and dynamic and static iron core matching design are reasonable, the reaction spring counter-force is enough little, so this yoke can be omitted.

In conjunction with Fig. 1 and Fig. 2, (or on said central magnetic circuit) is provided with first and is installed in hole 23 and second and is installed in hole 24 in the container cavity of the first skeleton 2, so after current coil 4 is sleeved on to the first skeleton 2, by current coil 4 in the axis of the first skeleton 2 (being also the central axis of current coil 4) on every side self-assembling formation the center magnetic path of the first skeleton 2, first be installed in hole 23 and second and be installed in the center magnetic path that in fact hole 24 is exactly current coil 4.First is installed in hole 23 and second is installed in hole 24 perforations, the same driving push rod 10 so that they can hold respectively and be slidably installed.In the container cavity of described the second skeleton 8, (or on said central magnetic circuit) is provided with the 3rd and is installed in hole 81, so after potential winding 6 is sleeved on to the second skeleton 8, by potential winding 6 in the axis of the second skeleton 8 (being also the central axis of potential winding 6) on every side self-assembling formation the center magnetic path of the second skeleton 8, the 3rd be installed in the center magnetic path that in fact hole 81 is exactly potential winding 6.First is installed in hole 23 and the 3rd is installed in hole 81 and docks and connect, this docking also connects namely two independently magnetic circuit docking structures, docking by this structure and two skeletons, not only make the center magnetic path of current coil 4 and the center magnetic path of potential winding 6 be docking together, and make to connect first be installed in hole 23 and the 3rd and be installed in hole 81 and interior can holding the second moving iron core 5 and push rod 10 be installed.Of the present utility model first is installed in hole 23 and second is installed in hole 24 and connects, first is installed in hole 23 and the 3rd and is installed in hole 81 and docks and connect, and push rod 10 runs through first and is installed in hole 23, second and is installed in hole 24 and the 3rd and is installed in hole 81.Referring to Fig. 6, the first moving iron core 1 comprises cylindricality core body 11 and is formed on the transmission end face 12 on cylindricality core body 11, second of cylindricality core body 11 and the first skeleton 2 is installed in hole 24 and is slidably matched, a kind of optimal way of this mode of being only described traveling priority of being slidably matched, do not get rid of the mode of other traveling priority.The first moving iron core 1 is arranged on second in the mode of traveling priority and is installed in hole 24, and contact cooperation with push rod 10, that is: the first moving iron core 1 be installed to second be installed in hole 24 can be along the second longitudinally traveling priority that is installed in hole 24 after interior, and the transmission end face 12 of the first moving iron core 1 is installed in the end of the afterbody 102 of push rod 10 in the hole 24 in and contact cooperations second, and moves to push rod 10 transmission short circuit currents dropouts by this contact cooperation.Here transmission end face 12 contacts with the end of the afterbody 102 of push rod 10 that to coordinate be the first moving iron core 1 contacts cooperation a kind of preferred concrete structure scheme with push rod 10, refer to that coordinating between the first moving iron core 1 and push rod 10 comprises contact process and separation process this is so-called " contact coordinates ", by contact process, make the first moving iron core 1 thread off and to move to push rod 10 transmission short circuit currents, by separation process, make the first moving iron core 1 not hinder the residual current of push rod 10 to thread off and move.The second moving iron core 5 is arranged on first of perforation by the traveling priority auxiliary structure mode of traveling priority (with) and is installed in hole 23 and the 3rd and is installed in hole 81, and contact cooperation with push rod 10, that is: the second moving iron core 5 is installed to first of perforation and is installed in hole 23 and the 3rd and is installed in hole 81, can be installed in the longitudinally traveling priority that hole 23 and the 3rd is installed in hole 81 along first, and the second moving iron core 5 first is installed in hole 23 and the 3rd and is installed in hole 81 and contacts cooperation with push rod 10 what connect, this technical characterictic in fact also defines the second moving iron core 5 and all across first, is installed in hole 23 and the 3rd all the time and is installed between hole 81, that is to say, the second moving iron core 5 is two independently shared iron cores in magnetic circuit, when potential winding 6 loads the dropout driving voltage, produce the electromagnetic attraction that can drive the second moving iron core 5 to move between the second moving iron core 5 and static iron core 7, while in current coil 4, short circuit current being arranged, electromagnetic attraction between the second moving iron core 5 and the first moving iron core 1 can drive the first moving iron core 1 to move.Referring to Fig. 5, the second moving iron core 5 is provided with first end face 52 at through hole 51 and its two ends, the through hole 51 of the second end face 53, the second moving iron cores 5 is sleeved on the afterbody 102 of the push rod 10 shown in Fig. 4.The traveling priority auxiliary structure of the second moving iron core 5 can have multiple concrete scheme, a kind of preferred scheme is, the through hole 51 of the second moving iron core 5 is slidably matched as the traveling priority auxiliary structure with the afterbody 102 of push rod 10, that is: the afterbody 102 of the push rod 10 be slidably matched with the through hole 51 of the second moving iron core 5 is to be in first to be installed in hole 23 and the 3rd and to be installed in the part in hole 81, by this, is slidably matched and realizes that the second moving iron core 5 is installed in hole 23 and the 3rd traveling priority be installed in hole 81 first.Another kind of available scheme is, described traveling priority auxiliary structure is that the second moving iron core 5 and first is installed in hole 23/ or the 3rd and is installed in hole 81 and is slidably matched, that is: the traveling priority auxiliary structure is that the second moving iron core 5 and first is installed in that hole 23 is slidably matched or is second to move iron core 5 and the 3rd and be installed in hole 81 and be slidably matched; Perhaps, the traveling priority auxiliary structure is that the second moving iron core 5 and first is installed in hole 23 and the 3rd and is installed in hole 81 and is slidably matched.Referring to Fig. 2, the first end face 52 by the second moving iron core 5 and contacting of the support portion 21 of the first skeleton 2 coordinate can limit second and move when iron core 5 has short circuit current in current coil 4 and can not move.Coordinating between the support portion 21 of the first end face 52 that this is so-called " contact coordinates " refers to the second moving iron core 5 and the first skeleton 2 comprises contact process and separation process, can be stabilized in fixed position while by contact, making the second moving iron core 5, in current coil 4, short circuit current be arranged, by separation, the second moving iron core 5 not hindered in residual current dropout course of action and move to static iron core 7.The second end face 53 of the second moving iron core 5 contacts cooperation with the limited step 103 of push rod 10, and passes through this contact cooperation and thread off and move to push rod 10 transmission residual currents.Coordinating between the limited step 103 of the second end face 53 that this is so-called " contact coordinates " refers to the second moving iron core 5 and push rod 10 comprises contact process and separation process, by contact process, make the second moving iron core 5 thread off and to move to push rod 10 transmission residual currents, by separation process, make the second moving iron core 5 not hinder the short circuit current of push rod 10 to thread off and move.Described static iron core 7 is fixed on the 3rd of the second skeleton 8 and is installed in 81 outer end, hole, should be able to understand, the 3rd is installed in hole 81 has two ends naturally, one of them end in the inside of magnetictrip and first is installed in hole 23 and docks, and another end in the outside of magnetictrip just refers to outer end.Static iron core 7 is provided with the first support holes 71, and push rod 10 is arranged in the first support holes 71 in the mode be slidably matched, and by this mounting means, push rod 10 is bearing in to the 3rd of the second skeleton 8 and is installed in hole 81, also can moves along the 3rd longitudinally that is installed in hole 81.As shown in Figure 1, the shake-up termination of push rod 10 reaches the 3rd and is installed in outside hole 81 through the first support holes 71, touches termination and be exactly the position for the trip(ping) bar (not shown) of touching circuit breaker on push rod 10.

Two action magnetictrip of the present utility model comprises the first reaction spring 3 and the second reaction spring 9.Wherein: the elastic force (counter-force) that the first reaction spring 3 provides is exclusively used in the electromagnetic actuation force that antagonism current coil 4 acts on the first moving iron core 1, and under normal circumstances, the counter-force of the first reaction spring 3 is greater than the electromagnetic actuation force that current coil 4 acts on the first moving iron core 1, and when the electric current of current flowing coil 4 meets or exceeds the threshold value of short circuit current, the counter-force of the first reaction spring 3 is less than the electromagnetic actuation force that current coil 4 acts on the first moving iron core 1, and the antagonism of the counter-force of the first reaction spring 3 has nothing to do with the electromagnetic actuation force that potential winding 6 acts on the second moving iron core 5.And the elastic force (counter-force) that the second reaction spring 9 provides is exclusively used in the electromagnetic actuation force that antagonism potential winding 6 acts on the second moving iron core 5, and, under normal circumstances, the counter-force of the second reaction spring 9 is greater than the electromagnetic actuation force that potential winding 6 acts on the second moving iron core 5, and in the situation that loaded residual current dropout driving voltage on potential winding 6, the counter-force of the second reaction spring 9 is less than the electromagnetic actuation force of the second moving iron core 5 that potential winding 6 acts on, and the antagonism of the counter-force of the second reaction spring 9 has nothing to do with the electromagnetic actuation force that current coil 4 acts on the first moving iron core 1.As can be seen here, what the utility model adopted is two independently reaction spring structures, its advantage is that the dependency structure parameter that comprises elastic force of two the first reaction springs 3 and the second reaction spring 9 can require independent design according to global optimization respectively, be independent of each other, the operating voltage of potential winding 6 is tied down without the counter-force that is subject to the first reaction spring 3 and is very high as prior art.Specifically: due under normal circumstances, in current coil 4, there is the operating current that is less than 3 to 5 times of rated current to flow through, and this operating current also can make current coil 4 produce the larger electromagnetic actuation force that acts on the first moving iron core 1, in order to guarantee under the operating current being less than 3 to 5 times of rated current that the instantaneous trip misoperation does not occur magnetictrip, so the counter-force of the first reaction spring 3 must design greatlyr.The electromagnetic actuation force size that acts on the second moving iron core 5 due to potential winding 6 is irrelevant with the counter-force of the first reaction spring 3, and residual current dropout control circuit (not shown) does not load operating voltage to potential winding 6 under normal circumstances, it is minimum to be that potential winding 6 acts on the electromagnetic actuation force of the second moving iron core 5, be even zero, so the counter-force of the second reaction spring 9 can design very littlely, accordingly, the operating voltage of potential winding 6 also can design very littlely, as the 50V low-voltage.The minimum voltage value of the magnetictrip residual current acting that existing product provides is unfixed often, there is direct correlation with rated current In and the instantaneous trip type (Type B (action multiple 3In～5In), C type (action multiple 5In～10In), D type (action multiple 10In～20In) are generally arranged) of current coil, along with the counter-force of the needed reaction spring of increase of action multiple also needs to increase, so, along with the increase of action multiple, the minimum voltage value of residual current acting is also increasing.Yet magnetictrip residual current acting of the present utility model can descend action message in low-voltage (such as 50V), and the rated current of action required voltage value and current coil is without any relation.

The two ends of the first reaction spring 3 are connected with the first moving iron core 1, the first skeleton 2 respectively, that is: an end of the first reaction spring 3 is connected with the first moving iron core 1, and the other end of the first reaction spring 3 is connected with the first skeleton 2.The concrete mounting connection structure of the first reaction spring 3 can have multiple, a kind of preferred scheme is as shown in Fig. 1,2,4,6, the first reaction spring 3 shown in Fig. 1 is installed in hole 24 and is enclosed within outside the afterbody 102 of the push rod 10 shown in Fig. 4 in second shown in Fig. 2, one end of the first reaction spring 3 is connected with the transmission end face 12 of the moving iron core 1 of first shown in Fig. 6, and the other end of the first reaction spring 3 is connected with the support portion 21 of the first skeleton 2 shown in Fig. 2.Similarly, the concrete mounting connection structure of the second reaction spring 9 also can have multiple, a kind of preferred scheme is as shown in Fig. 1,2,4, the second reaction spring 9 shown in Fig. 1 is installed in hole 81 and is enclosed within outside the head 101 of the push rod 10 shown in Fig. 4 in the 3rd shown in Fig. 2, one end of the second reaction spring 9 is connected with static iron core 7 as shown in Figure 1, the other end of the second reaction spring 9 is connected with the limited step 103 of the push rod 10 shown in Fig. 4, and the two ends of the second reaction spring 9 are connected with push rod 10, static iron core 7 respectively.

The concrete structure scheme of push rod 10 can have multiple, a kind of preferred scheme as shown in Figure 1 and Figure 4, push rod 10 comprise the 3rd of the second skeleton 8 be installed in head 101, the afterbody 102 in hole 81 and be arranged on head 101 and afterbody 102 between limited step 103.The head 101 of push rod 10 is arranged in the mode be slidably matched in the first support holes 71 of static iron core 7, touches the top that termination is arranged on head 101.Afterbody 102 runs through first of the first skeleton 2 and is installed in hole 23, second and is installed in the 3rd of hole 24 and the second skeleton 8 and is installed in hole 81, and the end of afterbody 102 is positioned at first and is installed in hole 23, and described end and the first moving iron core 1 contact cooperation.The limited step 103 of push rod 10 is positioned at the 3rd of the second skeleton 8 and is installed in hole 81, and limited step 103 contacts cooperation with the second moving iron core 5.Being sleeved on the moving iron core 1 of field drives first that the short circuit operating current of the current coil 4 on the first skeleton 2 produces, to overcome the resilient rear-moving of the first reaction spring 3 moving, and the mobile push rod 10 that promotes of the first moving iron core 1 moves.The moving iron core 5 of field drives second that is sleeved on the operating current generation of the potential winding 6 on the second skeleton 8 moves, and the resilient rear-moving that the mobile promotion push rod 10 of the second moving iron core 5 overcomes the second reaction spring 9 moves.The concrete structure scheme of the first skeleton 2 can have multiple, a kind of preferred scheme as depicted in figs. 1 and 2, first of the first skeleton 2 is installed in hole 23 and second and is installed between hole 24 and is provided with support portion 21, support portion 21 is provided with perforation first and is installed in the second support holes 22 that hole 23 and second is installed in hole 24, the afterbody 102 of described push rod 10 passes from the second support holes 22, and described afterbody 102 and the second support holes 22 are slidably matched.In order to make the first reaction spring 3 not hinder approaching of the first moving iron core 1 and the second moving iron core 5 or closed, can preferentially adopt the mounting structure scheme of the first reaction spring 3 as shown in Fig. 1,2,4,6, that is: the cylindricality core body 11 of the described first moving iron core 1 is provided with the first spring and is installed in hole, the transmission end face 12 of moving iron core 1 is arranged on the bottom that described the first spring is installed in hole, and an end of the first reaction spring 3 is arranged on described the first spring and is installed in hole.In order to make the second reaction spring 9 not hinder approaching of the second moving iron core 5 and static iron core 7 or closed, can preferentially adopt as Fig. 1, 3, 4, the mounting structure scheme of the second reaction spring 9 shown in 5, that is: described static iron core 7 is provided with the second spring and is installed in hole, described the second spring is installed in the concentric setting of the first support holes 71 on hole and static iron core 7, the diameter that the second spring is installed in hole is greater than the first support holes 71 and is installed between hole and the first support holes 71 and forms step at the second spring, one end of the second reaction spring 9 is arranged on the second spring and is installed in hole and with described step and is connected.Cover plate 30 is installed in hole 24 and compresses the first reaction spring 3 for the first moving iron core 1 is encapsulated in to second, and it is fixed on the first skeleton 2 one ends.

Below illustrate the operation principle of two action magnetictrips of the present utility model.

The short circuit instantaneous release comprises the current coil 4 in the main circuit that is connected in series in circuit breaker, the current excitation current coil 4 flow through in main circuit produces magnetic field, when the electric current flow through in main circuit reaches the short circuit current threshold value, the magnetic field energy that current coil 4 produces makes moving iron core 1 action of first in magnetic circuit, and this action drives push rod moves and touches circuit breaker trip.Residual current trip comprises potential winding 6, at current transformer, sense in main circuit when having residual current and surpassing predefined threshold value, control device loads drop away voltage to potential winding 6, this drop away voltage makes potential winding 6 produce magnetic field, this magnetic field makes moving iron core 5 actions of second in magnetic circuit, and this action drives push rod 10 moves and touches circuit breaker trip.

Under the circuit normal operation: residual current dropout control circuit (not shown) does not load operating voltage to potential winding 6, in potential winding 6, does not have electric current to pass through, and potential winding 6 does not produce excitation field, and the second moving iron core 5 is failure to actuate.The electric current now flow through in current coil 4 is less than the short circuit current threshold value, though current coil 4 produces the excitation field less than, the first moving iron core 1 overcomes the counter-force of the first reaction spring 3 and moves.

While enough large residual current occurring in circuit: the circuit that residual current dropout control circuit will turn-on voltage coil 6, make potential winding 6 two ends load operating voltage, potential winding 6 produces excitation field, this excitation field drives the second moving iron core 5 to move, the second end face 53 of the second moving iron core 5 contacts with the limited step 103 of push rod 10, and the counter-force that the second moving iron core 5 promotion push rods 10 overcome the second reaction spring 9 moves to static iron core 7 directions, the mobile shake-up termination driven on its head of push rod 10 is touched the circuit breaker operation mechanism (not shown) and is threaded off, realize the residual circuit defencive function.In this process, the transmission end face 12 of the first moving iron core 1 separates with the end of the afterbody 102 of push rod 10, makes the first moving iron core 1 not hinder the residual current of push rod 10 to thread off and moves.Because the counter-force of the second reaction spring 9 is very little, so, even under low voltage condition, the excitation field that potential winding 6 produces also is enough to make the second moving iron core 5 promotion push rods 10 move and cause circuit breaker operation mechanism to be threaded off to static iron core 7 directions.

When short circuit current occurring and arriving threshold value in circuit: the excitation field that the very large short circuit current in current coil 4 produces orders about the second moving iron core 5 and moves until the first end face 52 of the second moving iron core 5 contacts with the support portion 21 of the first skeleton 2 to the first moving iron core 1 direction, the first moving iron core 1 moves to the second moving iron core 5 directions, the transmission end face 12 of the first moving iron core 1 contacts with the end of the afterbody 102 of push rod 10, and the counter-force that the first moving iron core 1 promotion push rod 10 overcomes the first reaction spring 3 moves to the second moving iron core 5 directions, the mobile shake-up termination driven on its head of push rod 10 is touched the circuit breaker operation mechanism (not shown) and is threaded off, realize short-circuit protection function.In this process, the second end face 53 of the second moving iron core 5 separates with the limited step 103 of push rod 10, makes the second moving iron core 5 not hinder the short circuit instantaneous trip action of push rod 10.

While in circuit, residual current and short circuit current occurring: because short circuit current is larger simultaneously, the excitation field that current coil 4 is produced is more much bigger than the excitation field of potential winding 6 generations, so the first end face 52 of the second moving iron core 5 contacts and remains static with the support portion 21 of the first skeleton 2, the first moving iron core 1 moves to the second moving iron core 5 directions, the transmission end face 12 of the first moving iron core 1 contacts with the end of the afterbody 102 of push rod 10, and the counter-force that the first moving iron core 1 promotion push rod 10 overcomes the first reaction spring 3 moves to the second moving iron core 5 directions, the mobile shake-up termination driven on it of push rod 10 is touched the circuit breaker operation mechanism (not shown) and is threaded off, the two is all protected to realize residual current and short circuit current.

Claims

1. a two action magnetictrip, comprise current coil (4), potential winding (6), static iron core (7), cover plate (30), the first moving iron core (1), the second moving iron core (5) and the push rod (10) of threading off for pushing mechanism, it is characterized in that:

Described static iron core (7) is provided with the first support holes (71), described push rod (10) comprise head (101), afterbody (102) and be arranged on head (101) and afterbody (102) between limited step (103), the head (101) of this push rod (10) is arranged in the first support holes (71) in the mode be slidably matched, and reaches outside this hole through the first support holes (71);

Described current coil (4) is sleeved on the first skeleton (2), the first skeleton (2) is arranged in yoke (20), the first reaction spring (3) and cover plate (30) and the first moving iron core (1) are equipped with in being installed in chamber of the first skeleton (2), the first spring that one end of described the first reaction spring (3) is connected to the first moving iron core (1) is installed in hole, its other end is connected with the support portion (21) of the first skeleton (2), the described first moving iron core (1) is arranged on being installed in chamber of the first skeleton (2) in the mode of traveling priority, and coordinate with the operation associated end in contact of the afterbody (102) of described push rod (10), it is mobile that the first moving iron core (1) is subject to the field drives of the short circuit operating current of current coil (4) to overcome the first reaction spring (3) elastic force promotion push rod (10),

Described potential winding (6) is sleeved on the second skeleton (8), the second reaction spring (9) and static iron core (7) are equipped with in being installed in chamber of the second skeleton (8), the two ends of described the second reaction spring (9) respectively with the limited step (103) of push rod (10), static iron core (7) connects, the described second moving iron core (5) is arranged on by the first skeleton (2) and the second skeleton (8) and docks in formed housing region by the traveling priority auxiliary structure, and contact cooperation with the limited step (103) of push rod (10), the second moving iron core (5) is subject to the field drives of the operating current of potential winding (6) to promote push rod (10) to overcome the second reaction spring (9) elastic force and move.

2. two action magnetictrip according to claim 1 is characterized in that:

In the container cavity of described the first skeleton (2), be provided with first be installed in hole (23) and with first be installed in that hole (23) connects second be installed in hole (24), be provided with the 3rd in the container cavity of described the second skeleton (8) and be installed in hole (81), described static iron core (7) is fixed on the outer end that the 3rd of the second skeleton (8) is installed in hole (81), first of described the first skeleton (2) is installed in hole (23) and is installed in hole (81) with the 3rd of the second skeleton (8) and docks and connect, be installed in hole (23) by first, second is installed in hole (24) and the 3rd is installed in the slideway that hole (81) the described push rod of permission (10) that formation runs through jointly is slidably installed,

Described support portion (21) is arranged on first of the first skeleton (2) and is installed in hole (23) and second and is installed between hole (24), and support portion (21) are provided with and connect first and be installed in the second support holes (22) that hole (23) and second is installed in hole (24);

The described first moving iron core (1) is arranged on second in the mode of traveling priority and is installed in hole (24), the described second moving iron core (5) is slidably mounted on first of perforation and is installed in hole (23) and the 3rd and is installed in hole (81), described traveling priority auxiliary structure is that the second moving iron core (5) and described first is installed in hole (23)/or the 3rd be installed in hole (81) and be slidably matched, and

The described second moving iron core (5) all promotes same push rod (10) but the onrelevant operation while moving with the first moving iron core (1).

3. two action magnetictrip according to claim 2 is characterized in that:

The head (101) of described push rod (10) is positioned at the 3rd of the second skeleton (8) and is installed in hole (81), and it touches the top that termination is arranged on head (101); The head (101) of described push rod (10) reaches the 3rd through the first support holes (71) and is installed in outside hole (81);

The afterbody (102) of described push rod (10) runs through first of the first skeleton (2) and is installed in hole (23), second and is installed in the 3rd of hole (24) and the second skeleton (8) and is installed in hole (81), the afterbody (102) of described push rod (10) passes from described the second support holes (22), and, described afterbody (102) is slidably matched with the second support holes (22), and the described end that contacts the afterbody (102) coordinated with the first moving iron core (1) is positioned at first and is installed in hole (23);

The limited step (103) that contacts cooperation with the second moving iron core (5) of described push rod (10) is positioned at the 3rd of the second skeleton (8) and is installed in hole (81).

4. two action magnetictrip according to claim 1 is characterized in that:

The described second moving iron core (5) is provided with through hole (51), the first end face (52) and the second end face (53) on the afterbody (102) that is sleeved on push rod (10), described the first end face (52) contacts cooperation with the support portion (21) of the first skeleton (2), while by the moving iron core (5) of this contact engagement limits second, in current coil (4), short circuit current being arranged, can not move;

Described the second end face (53) contacts cooperation with the limited step (103) of push rod (10), and coordinates to push rod (10) and transmit residual current dropout action by this contact.

5. two action magnetictrip according to claim 2, it is characterized in that: the described first moving iron core (1) comprises cylindricality core body (11) and is formed in the transmission end face (12) on cylindricality core body (11), the first spring of the described first moving iron core (1) is installed in hole and is formed on described cylindricality core body (11), for an end of the first reaction spring (3) is installed, the transmission end face (12) of the first moving iron core (1) is arranged on the bottom that described the first spring is installed in hole, described cylindricality core body (11) is installed in hole (24) with second of the first skeleton (2) and is slidably matched, described transmission end face (12) contacts cooperation with the end of the afterbody (102) of push rod (10), and coordinate to push rod (10) and transmit short circuit current dropout action by this contact.

6. two action magnetictrip according to claim 2, it is characterized in that: described the first reaction spring (3) is in second of the first skeleton (2) is installed in hole (24) and be enclosed within outside the afterbody (102) of push rod (10), and the end that first spring that is connected to the first moving iron core (1) of described the first reaction spring (3) is installed in the hole in is connected with the first transmission end face (12) that moves iron core (1).

7. two action magnetictrip according to claim 2 is characterized in that: described the second reaction spring (9) is in the 3rd of the second skeleton (8) is installed in hole (81) and be enclosed within outside the head (101) of push rod (10).

8. two action magnetictrip according to claim 4, it is characterized in that: the through hole (51) that described traveling priority auxiliary structure is the second moving iron core (5) is slidably matched with the afterbody (102) of push rod (10).

9. two action magnetictrip according to claim 1, it is characterized in that: described static iron core (7) is provided with the second spring and is installed in hole (72), described the second spring is installed in the concentric setting of the first support holes (71) on hole (72) and static iron core (7), the diameter that the second spring is installed in hole (72) is greater than the first support holes (71) and is installed between hole (72) and the first support holes (71) and forms step at the second spring, and an end of the second reaction spring (9) is arranged on the second spring and is installed in hole (72) and is connected on described step.

10. two action magnetictrip according to claim 1, it is characterized in that: the counter-force of described the first reaction spring (3) is greater than the counter-force of the second reaction spring (9).