CN102097248B - Vacuum circuit breaker with electromotive force compensation circuit - Google Patents
Vacuum circuit breaker with electromotive force compensation circuit Download PDFInfo
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- CN102097248B CN102097248B CN 201110033259 CN201110033259A CN102097248B CN 102097248 B CN102097248 B CN 102097248B CN 201110033259 CN201110033259 CN 201110033259 CN 201110033259 A CN201110033259 A CN 201110033259A CN 102097248 B CN102097248 B CN 102097248B
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Abstract
The invention discloses a vacuum circuit breaker with an electromotive force compensation circuit, which belongs to the technical field of low voltage apparatuses. The vacuum circuit breaker comprises a shell, an operation mechanism, vacuum arc extinguish chambers, upper busbars and lower busbars, and is characterized in that: baffle plates are arranged on the upper part of the shell, and correspond to the vacuum arc extinguish chambers; the number of the baffle plates is equal to that of the vacuum arc extinguish chambers; the upper ends of the vacuum arc extinguish chambers are fixed with an upper conductive block respectively; a flexible connector is arranged above each upper conductive block; one end of the flexible connector is extended downwards, and is fixed with one side, facing the operation mechanism, of the upper conductive block so as to form a [-shaped conductive path by the flexible connector and the upper conductive block; the other end of the flexible connector is extended away from the operation mechanism, and is fixedly connected with the upper busbar; and the baffle plates are attached to the upper surfaces of the flexible connectors. The vacuum circuit breaker has the advantages of reducing the depth of the shell of the circuit breaker to meet the requirements of miniaturization on the volume of the circuit breaker, and ensuring the persistent stability of an electromotive force.
Description
Technical field
The invention belongs to the low voltage electrical apparatus technology field, be specifically related to a kind of vacuum circuit-breaker with electric power compensation circuit.
Background technology
Such as industry the reason of knowledge, in low-voltage distribution system, circuit breaker has the distribution electric energy, protection power circuit and power consumption equipment, the harm of avoiding causing because of overload, negative pressure, short circuit and/or earth fault etc. takes place.At present; Use through the operating voltage that improves electrical power trans mission/distribution system voltage and terminal electrical appliance and to reduce electric energy loss and expansion send electric radius progressively to become a reality; Thereby make the application of vacuum circuit-breaker in this electrical power trans mission/distribution system have more advantage, this be because: at first because low-voltage vacuum circuit breaker has the insensitive characteristic of voltage when cut-offfing fault current; Therefore more than AC690V, particularly the breaking capacity under the AC1140V rated voltage has competitiveness; Secondly, vacuum circuit-breaker is when the disjunction rated current, and electric arc spreads rapidly in the vacuum medium and extinguishes, and is extremely slight to contact burning, so vacuum circuit-breaker has very high electric life; Once more; Because the contact of vacuum circuit-breaker is sealed in the vacuum interrupter; So air pressure, humidity and/or pollution etc. that the breaking capacity of circuit breaker can avoid traditional air type circuit breaker to be subject to environment of living in influence problem; And do not have arcing and free gas to overflow during disjunction, can really realize the zero arcing of breaking course, improve the safety operation level of electrical equipment.Above-mentioned three key elements have been confirmed vacuum circuit-breaker and have been specially adapted to the high and non-maintaining demanding occasion of operating voltage.
Vacuum interrupter is the parts of the most critical of vacuum circuit-breaker disjunction fault current, because dynamic and static contact is realized connecting and separating in the extremely airtight space of vacuum interrupter.Because the particularity that vacuum interrupter is made and to the harsh property of volume requirement; Therefore, can't imitate the air circuit that kind dynamic and static contact is processed (being designed to) comparatively complicacy and enough parallelly connected contact forms of number and use and reduce the huge contraction electrodynamic repulsion force that produces between the closed contact under the short-circuit conditions.So; For the anti-ability of the weak point that improves vacuum circuit-breaker (ability of short time withstand current); Usually take measure, increase contact pressure by this, prevent because of shrinking the contact melting welding that the excessive pernicious increase of contact resistance that causes of electrodynamic repulsion force is caused at the outer setting electric power compensation circuit of vacuum interrupter; To this, can be by being not limited to following document confirmation of giving an example.
The low-voltage vacuum circuit breaker main contact electric power collocation structure that China utility model patent Granted publication CN2524363Y recommends; With the formation U-shaped that is flexible coupling in loop by way of compensation; It is reverse when the electric current process is flexible coupling; Thereby produce the repulsion that repels each other, make the moving contact (patent is claimed main contact) that is connected with vacuum interrupter receive downward thrust, the contact pressure when increasing closure.
The low-voltage vacuum circuit breaker of the charged force compensating that Granted publication CN2570963Y provides; The same formation U-shaped that is flexible coupling in loop by way of compensation; The top that is flexible coupling is electrically connected with the moving conductive rod formation of vacuum interrupter through the rigid conductive piece; And the bottom that is flexible coupling constitutes through rigid conductive piece and contiguous block and outlet busbar on being fixed on general frame equally and is electrically connected, and electric current is reverse when being flexible coupling, thereby produces the repulsion of repulsion each other; Give the thrust that moving conductive rod makes progress by this repulsion, increased its (moving conductive rod) and contacted closed contact pressure with static conductive rod.
Though above-mentioned two patent schemes have the effect that reaches the electric power compensation that plays the same tune on different musical instruments; But; Because it is to embody through screw (the tightening) of the vertical screw in top that electric conductor promptly is flexible coupling with being electrically connected of vacuum interrupter moving conductive rod, again because the vertical screw in top has also had the effect of transfer operation mechanism mechanokinetic mechanical connection concurrently, therefore; Circuit breaker is through behind the frequent operation; The mechanical connection position can occur becoming flexible because of vertical (vertically) vibrated, thus cause being electrically connected unreliable, cause accident easily.In addition; Also can see from above-mentioned two kinds of electric power compensation schemes; The U-shaped loop all is arranged on a side of vacuum interrupter owing to be flexible coupling, and away from vacuum interrupter, has therefore increased the degree of depth of circuit breaker; Restricted the long-pending miniaturization of body of opening circuit, be unfavorable for that simultaneously electronic balancing force directly acts on vacuum interrupter.
In view of the existing drawback of above-mentioned prior art; Not only be necessary the connected mode of vacuum circuit-breaker current-carrying part is improved; But also be necessary the spatial placement that is flexible coupling is carried out choose reasonable, nationality with the development trend that adapts to the circuit breaker miniaturization with make electronic balancing force directly act on vacuum interrupter.For this reason, the applicant has carried out repeatedly and good try, and the technical scheme that will introduce below is based on producing under this prerequisite.
Summary of the invention
Task of the present invention is to provide a kind of degree of depth of the housing that helps practicing thrift circuit breaker and uses the miniaturization of satisfying the circuit breaker volume and requires and help to make electronic balancing force to directly act on vacuum interrupter and help guaranteeing the vacuum circuit-breaker with electric power compensation circuit of electrodynamic repulsion force lasting stability.
Task of the present invention is accomplished like this; A kind of vacuum circuit-breaker with electric power compensation circuit; Comprise housing, be located at operating mechanism on the housing, be arranged on the housing and by a plurality of vacuum interrupters, quantity that operating mechanism drives equate with the quantity of vacuum interrupter and with the last busbar and the same following busbar that equates and be electrically connected with the quantity of vacuum interrupter of the upper end electrical connection of vacuum interrupter with the lower end of vacuum interrupter; Be characterised in that: have the baffle plate that quantity equates with the quantity of vacuum interrupter on the described housing and on top corresponding to said vacuum interrupter; The upper end of said vacuum interrupter is fixed with conducting block on; Corresponding on conducting block above have one and be flexible coupling; This end that is flexible coupling is to extending below and fixing towards a side of said operating mechanism with last conducting block; Making is flexible coupling constitutes with last conducting block [conductive path of shape, and the other end that is flexible coupling is towards extending away from the direction of operating mechanism and being fixedly connected with the said busbar of going up, described baffle plate touches with the upper surface subsides that are flexible coupling.
In a concrete embodiment of the present invention; Described housing comprises one group of vacuum extinction chamber that pedestal, base plate and quantity equate with the quantity of said vacuum interrupter; Base plate matches with pedestal; The vacuum extinction chamber is made up of half chamber on the pedestal and half chamber on the base plate jointly, and insulation is separated between the adjacent vacuum extinction chamber, on the upper chambers wall of each vacuum extinction chamber and the corresponding both sides that are positioned at the chamber wall respectively offer the baffle plate slot; Described baffle plate is plugged on the baffle plate slot; And offer the breach of stepping down towards the position placed in the middle of an end of said base plate at baffle plate, and the described middle part that is flexible coupling and offer the slot to make way that is flexible coupling at the position corresponding to the breach of stepping down, described operating mechanism is located on the described pedestal.
In another concrete embodiment of the present invention, the lower end of described vacuum interrupter is fixed with conducting block, and described busbar down is electrically connected through fixing to constitute with the lower end of vacuum interrupter with following conducting block.
In another concrete embodiment of the present invention; Respectively be provided with a linkage and a contact support in described one group of vacuum extinction chamber; The contact support is corresponding to the said top that is flexible coupling; Be connected with the upper end of said vacuum interrupter, and be connected with linkage, the linkage pivotal connection is connected on said pedestal and with described operating mechanism
In another concrete embodiment of the present invention, a said end that is flexible coupling is fixed with one first mating part, on this first mating part, offers at least one pair of matching hole, and each matching hole is fixedly connected with the said conducting block of going up through the hold-down screw that is flexible coupling; Be fixed with one second mating part at the said other end that is flexible coupling, on this second mating part, offer one group first and connect fixing hole, each first connection fixing hole is fixedly connected with the described busbar of going up through the busbar hold-down screw.
Also have among the concrete embodiment of the present invention, described baffle plate is by the material of non-magnetic conduction.
more of the present invention and among concrete embodiment, the material of described non-magnetic conduction is a stainless steel.
In of the present invention and then concrete embodiment, described linkage comprises connecting rod and lever, and an end and the described operating mechanism of connecting rod are hinged; And the other end of connecting rod is connected with lever; Lever pivot is arranged on the described pedestal, and described contact support comprises elastic parts and pull bar, and elastic parts is located on the pull bar; The bottom of pull bar is connected with the upper end of described vacuum interrupter, and the top of pull bar is connected with lever pivot.
In again of the present invention and then concrete embodiment, said lever is made up of a pair of that correspond to each other and clamping plate that structure is identical, at least one piece of clamping plate connecting axle and a connecting rod Connection Block, and the shape of a pair of clamping plate all is sickleshaped; Corresponding position at a pair of clamping plate respectively offers a pivot hole and a connecting hole, and the clamping plate connecting axle is fixed between a pair of clamping plate, and connecting rod Connection Block pivotal connection is at an end of a pair of clamping plate; Described connecting rod is connected with the connecting rod Connection Block, and said pivot hole and connecting hole all are positioned at the middle part of described a pair of clamping plate, and pivot hole is connected with described base pivot; Described pull bar is an insulator, and the top of the central authorities of this pull bar is installed with one first double-screw bolt, and the bottom is installed with one second double-screw bolt; The separation insulated from each other of first, second double-screw bolt, wherein: first double-screw bolt is connected with elastic parts, and second double-screw bolt is connected with the upper end of described vacuum interrupter; And pull bar also constitutes a spring cavity towards a side of elastic parts, and described elastic parts comprises spring, spring base, gland and stop nut, and spring, spring base and gland are nested with successively on described first double-screw bolt; And the lower end of spring is located in the described spring cavity; Stop nut revolves and fits on first double-screw bolt, and described gland is limited, and on the end face at the two ends of gland, respectively is extended with a gland pivot ear; Gland pivot ear and described connecting hole pivotal connection; To the distance between the pivot hole, described connecting rod is installed with a screw rod with the end that said connecting rod Connection Block is connected to distance between described connecting hole to the said pivot hole less than said connecting rod holder, and screw rod is connected with the connecting rod Connection Block; And limit limiting nut; And the lower end of connecting rod offers the pivot hole, is equipped with the hub setting axle on the pivot hole, and this hub setting axle and described operating mechanism are hinged.
In more of the present invention and then concrete embodiment, described baffle plate and said housing constitute one.
Technical scheme provided by the invention; Since will be flexible coupling corresponding to last conducting block top; Promptly corresponding to directly over the vacuum interrupter; This kind is arranged so that the redundancy section that is flexible coupling is able to shorten, and comparing is flexible coupling is positioned at vacuum interrupter one side, help to dwindle circuit breaker housing the degree of depth and satisfy the miniaturization requirement of circuit breaker volume.Simultaneously, " [" shape conductive path can obtain bigger electronic balancing force and act on vacuum interrupter; Moreover, owing to added baffle plate being flexible coupling, make when vacuum interrupter being applied electrodynamic repulsion force when being flexible coupling receiving electric current, be flexible coupling and do not make a concession, thereby guaranteed electrodynamic lasting stability because of the reaction force of electrodynamic repulsion force.
Description of drawings
Fig. 1 is a concrete example structure figure of the present invention.
Fig. 2 is the cutaway view after Fig. 1 assembling.
Fig. 3 is the sketch map that is flexible coupling of the present invention.
Fig. 4 is the assembling sketch map of baffle plate and pedestal.
Fig. 5 is the structure chart of last conducting block.
Fig. 6 is the structure chart of baffle plate.
The concrete structure figure that Fig. 7 supports for contact.
Fig. 8 is the cutaway view of Fig. 7.
Embodiment
In order to make the public can fully understand technical spirit of the present invention and beneficial effect; The applicant will combine the accompanying drawing specific embodiments of the invention to describe in detail below; But the applicant is not the restriction to technical scheme to the description of embodiment, anyly makes form but not the variation of essence all should be regarded as protection scope of the present invention according to the present invention design.
See also Fig. 1; Comprise as the vacuum circuit-breaker with electric power compensation circuit provided by the invention: a housing 1 that is fitted to each other and constitutes by pedestal 11 and base plate 12; This housing 1 has the vacuum extinction chamber 13 of one group of (present embodiment is three) separation insulated from each other (also claiming alternate separation); According to known general knowledge, vacuum extinction chamber 13 is to be that the semicircle cavity constitutes jointly by pedestal 11 with half chamber separately on the base plate 12; One operating mechanism 2 is arranged on the pedestal 11, and linkage 3 and contact support 4 (following also will specify); One group of vacuum interrupter 5; The quantity of this group vacuum interrupter 5 equates with the quantity of aforesaid vacuum extinction chamber 13; Present embodiment is three, distributes (setting) vacuum interrupter 5 in each vacuum extinction chamber 13, and vacuum interrupter 5 is connected with operating mechanism 2; And drive its (vacuum interrupter 5) action by operating mechanism 2, aforesaid linkage 3 and contact support that 4 all equate with the quantity of vacuum interrupter 5; Busbar 121 on one group; Quantity equates with the quantity of vacuum interrupter 5; Busbar 121 is by means of promptly being electrically connected with the upper end of vacuum interrupter 5 through the hole on the last busbar chamber 123 on the base plate 12 on each; One group of following busbar 122 that quantity equates with the quantity of vacuum interrupter 5 equally, corresponding to the below of last busbar 121, each time busbar 122 same slotted eyes 124 that pass through on the base plate 12 are electrically connected with the lower end of vacuum interrupter 5.Aforesaid linkage 3 and contact as operating mechanism 2 supports 4 quantity to equate with the quantity of vacuum interrupter 5; Be that each vacuum interrupter 5 is equipped with a linkage 3 and a contact to support 4; And linkage 3 is all followed in (companion) vacuum interrupter 5 is contained in aforesaid vacuum extinction chamber 13 with contact support 4; Wherein, Linkage 3 pivots are arranged on the pedestal 11 and are hinged with aforesaid operating mechanism 2, and contact supports that 4 are connected with the upper end of vacuum interrupter 5 and are connected with linkage 3.
Because the structure of three vacuum interrupters 5, three linkages 3 and three contact supports 4 is mutually the same, so the applicant only describes to one of them in the following description.
The top and bottom of vacuum interrupter 5 respectively have a link 51; On the link 51 of upper end, be fixed with conducting block 52 on; Fixing conducting block 53 once on the link 51 of lower end; Following conducting block 53 is corresponding with aforesaid slotted eye 124, and formation is electrically connected so that aforesaid busbar 122 is down fixed with following conducting block 53.Have one above corresponding to conducting block on aforesaid 52 and be flexible coupling 6 as the electric power compensation circuit; This end of 6 of being flexible coupling is to extending below and fixing towards a side of said operating mechanism 2 with last conducting block 52; Making is flexible coupling 6 constitutes the " conductive path of [" shape (bracket shape), and 6 the other end of being flexible coupling is towards extending away from the direction of operating mechanism 2 and being fixedly connected with the aforesaid busbar 121 of going up that trends towards English alphabet with last conducting block 52.Specifically by shown in Figure 1; And at least a portion at 6 the middle part of being flexible coupling corresponding to last conducting block 52 towards last upper surface promptly corresponding to last conducting block 52 directly over; Also promptly corresponding to last conducting block 52 towards support as the contact of the system of operating mechanism 24 directly over; 6 the other end of being flexible coupling is insinuated into aforesaid going up in the busbar chamber 123, keeps supplying busbar 121 and fixes with it and constitute and be electrically connected.
As a kind of preferred mode; To be flexible coupling and 6 fix with a side of the diapire of the vacuum extinction chamber 13 on aforesaid pedestal 11 of last conducting block 52; And 6 the middle part of will being flexible coupling is covered in conducting block 52 is supported a side of 4 towards contact surface, promptly is covered in the upper surface of conducting block 52.
Ask for an interview Fig. 3 and Fig. 5 and still combine Fig. 1; By shown in Figure 5; Do not receive the fixing hole 523 that illustrates restricted number at last conducting block 52 towards promptly on a side side of operating mechanism 2, offering quantity on the side side of the vacuum extinction chamber 13 on the pedestal 11 yet; And offer a link matching hole 521 in the central authorities of last conducting block 52; And this link matching hole 521 also has the tensioner groove 5211 that promptly communicates with the external world that do not seal, on a pair of cell wall that corresponds to each other of tensioner groove 5211, respectively offers one and tightens up hole 5212.After the link 51 (Fig. 1 shows) that is nested with the upper end of vacuum interrupter 5 when last conducting block 52 through the link matching hole 521 on it is gone up; Insert with conducting block hold-down screw 522 (Fig. 1 shows) and to tighten up hole 5212 and be spun on the conducting block hold-down screw 522 by tightening up nut 5221 (Fig. 1 shows); Thereby conducting block 52 is fixed on the link 51 on top of vacuum interrupter 5 reliably, and goes up conducting block 52 and can not escape in link 51 because of the extensional vibration that circuit breaker in use causes because of frequent operation.By Fig. 1 and shown in Figure 3; 6 ends that are connected with last conducting block 52 are fixed with one first mating part 61 being flexible coupling; Spaced apartly on this first mating part 61 be provided with the matching hole 611 that the position is corresponding with aforesaid fixing hole 523 (Fig. 5 shows) and quantity equates; Use the hold-down screw 6111 that is flexible coupling to screw in the aforesaid fixing hole of going up on the conducting block 52 523 through matching hole 611 by Fig. 1 signal; Thereby will be flexible coupling 6 an end and last conducting block 52 secure fixation; It is loosening equally can not cause the hold-down screw 6111 of being flexible coupling because of the factor of vibration and so on, thereby the CN2524363Y that mentions in the above with respect to prior art such as applicant and the CN2570963Y connected mode that is connected with vacuum interrupter that will be flexible coupling has substantial difference, and the technique effect that is produced also is beyond thought.6 the other end of being flexible coupling is provided with second mating part 62; On second mating part 62, offer one group of first connection fixing hole 621 and be connected fixing hole 622 with one group second; One group of hold-down screw that quantity through being connected fixing hole 622 with second equates second connect fixing hole 622 the position busbar chamber 123 on 62 base plates 12 of second mating part is fixing; After treating that second mating part 62 is installed on the busbar chamber 123, again by busbar hold-down screw 6211 first being connected fixing hole 621 and will going up busbar 121 and be fixedly connected on the last busbar hole 1211 on the last busbar 121 and second mating part 62 successively with second mating part 62.Above mentioned conducting block 53 down passes through screw with the link 51 of the bottom of vacuum interrupter 5, and following conducting block 53 and following busbar 122 are through one group of screw, the slotted eye 124 on the following busbar 122 corresponding base plates 12.
Ask for an interview Fig. 4, Fig. 6 and still combine Fig. 1 and Fig. 3; By shown in Figure 3; Whole 6 bendings that take the shape of the letter U that are flexible coupling; And be flexible coupling 6 corresponding on the middle position at position of conducting block 52 offer the slot to make way 63 that is flexible coupling, and be flexible coupling 6 corresponding on the upper surface at position of conducting block 52, more properly say; 6 upper surfaces corresponding to a side of contact support 4 that are flexible coupling have a preferred baffle plate 7 that uses non-magnet material such as stainless steel to process, and on baffle plate 7 and in the position corresponding to the slot to make way 63 that is flexible coupling, offer the breach 71 of stepping down.On the chamber wall of the correspondence of the vacuum extinction chamber 13 of aforesaid pedestal 11, respectively offer a baffle plate slot 131; A pair of baffle plate slot 131 corresponds to each other; Promptly each extends to constitute and leads rib 72 towards a side of baffle plate slot 131 respectively by the corresponding both sides of the detailed baffle plate 7 that shows of Fig. 6, leads rib 72 and the effect inserting of baffle plate slot 131 with drawer-like.Therefore in addition,, avoid distortion, respectively constitute bending part 73 at an end of the vacuum extinction chamber 13 of baffle plate 7 on pedestal 11 and back to an end of vacuum extinction chamber 13 in order to ensure the end intensity of baffle plate 7.The applicant need to prove: although given an example the example that baffle plate 7 matches with baffle plate slot 131 in the above; That is to say the top that baffle plate 7 is provided to the vacuum extinction chamber 13 of housing 1 as independent parts; Promptly corresponding to the top of vacuum interrupter 5; But can mode similar with other or the title equivalence baffle plate 7 and housing 1 be constituted integrative-structure fully, can save baffle plate slot 131 in this case.
Shown in Fig. 1 and 4; In the corresponding both sides on the top of pedestal 1 and be used to distinguish on the chamber wall of vacuum extinction chamber 13 and respectively offer pivot hole 112; Pivot hole 112 head lamp brush guard pivots are provided with a pivot 1121; And the end, two ends that leans out pedestal 11 at pivot 1121 respectively disposes a jump ring 11211, plays preventing the scurry out effect of pedestal 11 of pivot 1121 by jump ring 11211, and linkage 3 hub settings that quantity above mentioned and vacuum interrupter 5 equates are on pivot 1121.
Ask for an interview Fig. 2, Fig. 7, Fig. 8 and continue to combine Fig. 1; Recommend the preferred but not structure of the linkage 3 that is limited to is following: comprise a connecting rod 31 and a lever 32; One end of connecting rod 31 is that lower end and said operating mechanism 2 shown in Figure 1 is hinged; And the other end of connecting rod 31 to be upper end shown in Figure 1 be connected with lever 32, lever 32 pivots are arranged on the described pedestal 11, contact supports 4 to be connected with lever 32.The lower end of connecting rod 31 constitutes a pair of pin joint seat; On a pair of pin joint seat and in the corresponding position, respectively offer a pivot hole 312; Pivot hole 312 is provided with a hub setting axle 3121; By hub setting axle 3121 with the rotating shaft pivot seat 211 hinged (pivotal connection) in the rotating shaft 21 of connecting rod 31 and operating mechanism 2, thereby realize being connected of linkage 3 and operating mechanism 2.The top of connecting rod 31 is connected with screw rod 311, and this screw rod 311 is used for being connected with lever 32.Lever 32 is made up of a pair of clamping plate 321, a pair of clamping plate connecting axle 322 and a connecting rod contiguous block 323; A pair of clamping plate 321 correspond to each other; Or claim to be parallel to each other; And a pair of clamping plate 321 respectively are sickleshaped (also can claim banana-shaped), on each clamping plate 321 and in the corresponding position, offer a pivot hole 3211 and a connecting hole 3212.Described clamping plate connecting axle 322 is between a pair of clamping plate 321, and described connecting rod Connection Block 323 is positioned at an end of the diapire of the vacuum extinction chamber 13 of a pair of clamping plate 321 on pedestal 11.Described clamping plate connecting axle 322 makes a pair of clamping plate 321 realize being connected to each other with connecting rod Connection Block 323 jointly.Screw rod 311 penetrates in the hole that is preset on the connecting rod Connection Block 323; And limiting nut 3111 at the position that leans out connecting rod Connection Block 323 with one limits; And corresponding to limit nut 3111 below set a pair of qualification nut 3111, limit nut 3111 a pair of of limiting nut 3111 cooperation tops of bottom screw rod 311 is connected (technique effect will be explained below) reliably with connecting rod Connection Block 323.The distance that aforesaid connecting hole 3212 arrives between the pivot hole 3211 less than connecting rod Connection Block 323 to the distance between the pivot hole 3211.Aforesaid pivot 1121 penetrates pivot hole 3211.
Aforesaid go up conducting block 52 6 constitute and trend towards with being flexible coupling [conductive path of shape, so just can be when the electric power compensation circuit that short circuit current process global shape takes the shape of the letter U the required electric power that is used to compensate of generation.And the electric power compensation circuit is between pull bar 42 and vacuum interrupter 5; Do not take the overall dimension of circuit breaker; More properly say, do not take the size (user mode can be described as the size of short transverse) of depth direction of the housing 1 of circuit breaker, thereby realize the miniaturization of circuit breaker volume.Simultaneously, be flexible coupling 6 with last conducting block 52 constitute " conductive path of [" shape, the part between 6 the both ends of being flexible coupling then be covered in conducting block 52 towards last surface.Being arranged so that of this kind conductive path is flexible coupling and 6 is positioned at directly over the conducting block 52, and both can know according to the relative theory of electrodynamic repulsion force that at a distance of nearer above-mentioned conductive path can produce bigger electrodynamic repulsion force and directly act on the vacuum interrupter 5.Moreover, the artificial active force of optimizing electrodynamic repulsion force of application, corresponding to be flexible coupling 6 above add baffledly 7, baffle plate 7 prevents to be flexible coupling and 6 receives the reaction force of electrodynamic repulsion force and make a concession, and can guarantee the lasting stability of electrodynamic repulsion force.In addition, why the applicant selects baffle plate 7 is non-magnet material, and selects stainless steel for use; Be that conductor is inner can be magnetized, and produces eddy current because under the metallic conductor of the magnetic conduction the action of a magnetic field that externally electric current produces; Can produce heat (or being called iron loss) on the one hand; Influence the work temperature rise of circuit breaker, eddy current also can produce complementary field on the other hand, moves thereby produce micro-electric arc when causing in the vacuum interrupter 5 the dynamic/static contact disjunction.
In the said structure; Because contact supports that 4 is coaxial with vacuum interrupter 5; Therefore the power of elastic parts 41 directly acts on vacuum interrupter 5 in the contact support 4, and it is by means of transition member conduction power such as rocking arms to need not to resemble prior art, thereby makes the elastic force in the vacuum interrupter 5 be able to reliable assurance; Again, the affixed screw rod 311 in the upper end of connecting rod 31 sets adjustable qualification nut 3111 on screw rod 311, and regulates the engagement height between connecting rod 31 and the lever 32 with cooperating of nut 311 limiting nut 3111; And; In Fig. 1; The upper end of screw rod 311 promptly leans out and is provided with one on the body of rod of connecting rod Connection Block 323 and limits nut 3111, and the bottom is provided with two and limits nuts 3111, and the self-locking action that therefore can limit nuts 3111 through two of bottom prevents that the connecting rod Connection Block 323 after fixing from gliding with respect to the double-screw bolt of the upper end of connecting rod 31; And the qualification nut 3111 on top is fixing up; The top does not make the nut self-locking because of terrestrial gravitation need not adopt usually, certainly, if painstakingly use a pair of qualification nut 3111 up then be fine fully; Also; Since from the distance between pivot hole 3211 to the connecting hole 3212 less than the distance between connecting rod Connection Block 323 to pivot hole 3211; Therefore because the difference of the arm of force makes the power at lever 32 two ends different, i.e. a side of contact support 4 has bigger stressed of a side with respect to connecting rod 31; Make connecting rod 31 and operating mechanism body 2 can both receive the effect of less relatively power, the useful life of improving connecting rod 31 and operating mechanism body 2; Again; By first, second double-screw bolt 421, isolation insulated from each other between 422; Thereby make vacuum interrupter 5 upper and lower conducting blocks 52,53 and be flexible coupling 6 and be positioned at electric current major loop that the copper bar on the base plate 12 forms, guarantee the safety of circuit breaker and embody practicality with respect to the insulation of parts such as operating mechanism 2, connecting rod 31 and lever 32.
In each above-mentioned technical scheme, described be flexible coupling 6 be generally integral piece, but if adopt side by side several parts to replace being flexible coupling of an above-mentioned bodily form 6 also should equivalence be a kind of accommodation of the present invention.
In each above-mentioned technical scheme, described baffle plate 7 can be made as one with housing 1, promptly in the vacuum extinction chamber 13 of housing 1, processes baffle plate 7 or like, and this kind mechanism does not break away from invention essence, should equivalence be a kind of accommodation of the present invention also.
In said structure, be fixedly connected with the left side (location status shown in Figure 1) of last conducting block 52 if will have 6 the end of being flexible coupling of first mating part 61, should be regarded as equivalence so and substitute and still belong to protection scope of the present invention.
Claims (10)
1.
a kind of vacuum circuit-breaker with electric power compensation circuit; Comprise housing (1), be located at operating mechanism (2) on the housing (1), be arranged on the housing (1) and by a plurality of vacuum interrupters (5), quantity that operating mechanism (2) drives equate with the quantity of vacuum interrupter (5) and with the last busbar (121) and the same following busbar (122) that equates and be electrically connected with the quantity of vacuum interrupter (5) of the upper end electrical connection of vacuum interrupter (5) with the lower end of vacuum interrupter (5); It is characterized in that: be equipped with the baffle plate (7) that quantity equates with the quantity of vacuum interrupter (5) on the described housing (1) and on top corresponding to said vacuum interrupter (5); The upper end of said vacuum interrupter (5) is fixed with conducting block on (52); Corresponding on the top of conducting block (52) have one be flexible coupling (6); One end of these be flexible coupling (6) is to extending below and fixing towards a side of said operating mechanism (2) with last conducting block (52); Make be flexible coupling (6) constitute [conductive path of shape with last conducting block (52); And the other end of be flexible coupling (6) is towards extending away from the direction of operating mechanism (2) and being fixedly connected with the said busbar (121) of going up, and described baffle plate (7) touches with the upper surface subsides of be flexible coupling (6).
2.
vacuum circuit-breaker with electric power compensation circuit according to claim 1; It is characterized in that described housing (1) comprises one group of vacuum extinction chamber (13) that pedestal (11), base plate (12) and quantity equate with the quantity of said vacuum interrupter (5); Base plate (12) matches with pedestal (11); Vacuum extinction chamber (13) is made up of half chamber on half chamber on the pedestal (11) and the base plate (12) jointly; And insulation is separated between the adjacent vacuum extinction chamber (13); On the upper chambers wall of each vacuum extinction chamber (13) and the corresponding both sides that are positioned at the chamber wall respectively offer baffle plate slot (131), described baffle plate (7) is plugged on the baffle plate slot (131), and offers the breach (71) of stepping down towards the position placed in the middle of an end of said base plate (12) at baffle plate (7); And the middle part of described be flexible coupling (6) and offer the slot to make way that is flexible coupling (63) at the position corresponding to the breach of stepping down (71), described operating mechanism (2) is located on the described pedestal (11).
3.
vacuum circuit-breaker with electric power compensation circuit according to claim 1; The lower end that it is characterized in that described vacuum interrupter (5) is fixed with conducting block (53), and described busbar (122) down is electrically connected through fixing to constitute with the lower end of vacuum interrupter (5) with following conducting block (53).
4.
vacuum circuit-breaker with electric power compensation circuit according to claim 2; It is characterized in that respectively being provided with in described one group of vacuum extinction chamber (13) linkage (3) and a contact support (4); Contact is supported (4) top corresponding to said be flexible coupling (6); Be connected with the upper end of said vacuum interrupter (5); And be connected with linkage (3), linkage (3) pivotal connection goes up and is connected with described operating mechanism (2) in said pedestal (11).
5.
vacuum circuit-breaker with electric power compensation circuit according to claim 1; An end that it is characterized in that said be flexible coupling (6) is fixed with one first mating part (61); On this first mating part (61), offer at least one pair of matching hole (611), each matching hole (611) is fixedly connected with the said conducting block (52) of going up through the hold-down screw that is flexible coupling (6111); Be fixed with one second mating part (62) at the said other end that is flexible coupling (6); On this second mating part (62), offer one group first and connect fixing hole (621), each first connection fixing hole (621) is fixedly connected with the described busbar (121) of going up through busbar hold-down screw (6211).
6.
vacuum circuit-breaker with electric power compensation circuit according to claim 1 and 2 is characterized in that the material of described baffle plate (7) by non-magnetic conduction.
7.
vacuum circuit-breaker with electric power compensation circuit according to claim 6, the material that it is characterized in that described non-magnetic conduction is a stainless steel.
8.
vacuum circuit-breaker with electric power compensation circuit according to claim 4; It is characterized in that described linkage (3) comprises connecting rod (31) and lever (32); One end of connecting rod (31) and described operating mechanism (2) are hinged, and the other end of connecting rod (31) is connected with lever (32), and lever (32) pivot is arranged on the described pedestal (11); Described contact support (4) comprises elastic parts (41) and pull bar (42); Elastic parts (41) is located on the pull bar (42), and the bottom of pull bar (42) is connected with the upper end of described vacuum interrupter (5), and the top of pull bar (42) and lever (32) pivotal connection.
9.
vacuum circuit-breaker with electric power compensation circuit according to claim 8; It is characterized in that said lever (32) is made up of a pair of that correspond to each other and clamping plate (321) that structure is identical, at least one piece of clamping plate connecting axle (322) and a connecting rod Connection Block (323); The shape of a pair of clamping plate (321) all is sickleshaped; Corresponding position at a pair of clamping plate (321) respectively offers a pivot hole (3211) and a connecting hole (3212), and clamping plate connecting axle (322) is fixed between a pair of clamping plate (321), and connecting rod Connection Block (323) pivotal connection is at an end of a pair of clamping plate (321); Described connecting rod (31) is connected with connecting rod Connection Block (323); Said pivot hole (3211) and connecting hole (3212) all are positioned at the middle part of described a pair of clamping plate (321), pivot hole (3211) and described pedestal (11) pivotal connection, and described pull bar (42) is an insulator; The top of the central authorities of this pull bar (42) is installed with one first double-screw bolt (421); The bottom is installed with one second double-screw bolt (422), first, second double-screw bolt (421,422) separation insulated from each other, and wherein: first double-screw bolt (421) is connected with elastic parts (41); And second double-screw bolt (422) is connected with the upper end of described vacuum interrupter (5); And pull bar (42) also constitutes a spring cavity (423) towards a side of elastic parts (41), and described elastic parts (41) comprises spring (411), spring base (412), gland (413) and stop nut (414), and spring (411), spring base (412) and gland (413) are nested with successively on described first double-screw bolt (421); And the lower end of spring (411) is located in the described spring cavity (423); Stop nut (414) revolves and fits on first double-screw bolt (421), and described gland (413) is limited, and on the end face at the two ends of gland (413), respectively is extended with a gland pivot ear (4131); Gland pivot ear (4131) and described connecting hole (3212) pivotal connection; Distance between described connecting hole (3212) to the said pivot hole (3211) is less than the distance between said connecting rod Connection Block (323) to the pivot hole (3211), and the end that described connecting rod (31) is connected with said connecting rod Connection Block (323) is installed with a screw rod (311), and screw rod (311) is connected with connecting rod Connection Block (323); And limit limiting nut (3111); And the lower end of connecting rod (31) offers pivot hole (312), is equipped with hub setting axle (3121) on pivot hole (312), and this hub setting axle (312) is hinged with described operating mechanism (2).
10.
Vacuum circuit-breaker with electric power compensation circuit according to claim 1 and 2 is characterized in that described baffle plate (7) and said housing (1) structure are one
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110033259 CN102097248B (en) | 2011-01-31 | 2011-01-31 | Vacuum circuit breaker with electromotive force compensation circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110033259 CN102097248B (en) | 2011-01-31 | 2011-01-31 | Vacuum circuit breaker with electromotive force compensation circuit |
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| Publication Number | Publication Date |
|---|---|
| CN102097248A CN102097248A (en) | 2011-06-15 |
| CN102097248B true CN102097248B (en) | 2012-12-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201110033259 Active CN102097248B (en) | 2011-01-31 | 2011-01-31 | Vacuum circuit breaker with electromotive force compensation circuit |
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| Country | Link |
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| CN (1) | CN102097248B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107393761A (en) * | 2017-09-26 | 2017-11-24 | 湖北网安科技有限公司 | A kind of environmentally friendly compact looped network cabinet vacuum circuit breaker |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2570963Y (en) * | 2002-09-16 | 2003-09-03 | 成都旭光电子股份有限公司 | Low-voltage vacuum breaker with electric power compensation |
| CN201134366Y (en) * | 2007-12-25 | 2008-10-15 | 吉林永大电气开关有限公司 | Low-voltage vacuum circuit breaker of permanent magnetism type |
| CN202189720U (en) * | 2011-01-31 | 2012-04-11 | 常熟开关制造有限公司(原常熟开关厂） | Vacuum circuit breaker with dynamoelectric force compensating circuit |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4946920B2 (en) * | 2008-03-03 | 2012-06-06 | 三菱電機株式会社 | Vacuum switch |
| JP5340043B2 (en) * | 2009-06-08 | 2013-11-13 | 三菱電機株式会社 | Breaker |
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2011
- 2011-01-31 CN CN 201110033259 patent/CN102097248B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2570963Y (en) * | 2002-09-16 | 2003-09-03 | 成都旭光电子股份有限公司 | Low-voltage vacuum breaker with electric power compensation |
| CN201134366Y (en) * | 2007-12-25 | 2008-10-15 | 吉林永大电气开关有限公司 | Low-voltage vacuum circuit breaker of permanent magnetism type |
| CN202189720U (en) * | 2011-01-31 | 2012-04-11 | 常熟开关制造有限公司(原常熟开关厂） | Vacuum circuit breaker with dynamoelectric force compensating circuit |
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| CN102097248A (en) | 2011-06-15 |
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