CN201311895Y

CN201311895Y - Screwed pipe type electromagnetic trip device

Info

Publication number: CN201311895Y
Application number: CNU2008202147528U
Authority: CN
Inventors: 陈玉兵; 张洵初; 陈志刚; 管瑞良; 王炯华
Original assignee: Changshu Switchgear Manufacturing Co Ltd
Current assignee: Changshu Switchgear Manufacturing Co Ltd
Priority date: 2008-12-11
Filing date: 2008-12-11
Publication date: 2009-09-16
Anticipated expiration: 2018-12-11

Abstract

Disclosed is a screwed pipe type electromagnetic trip device, which belongs to the low-voltage apparatus technical field. The screwed pipe type electromagnetic trip device comprises a knob, an adjusting rod, a spring, a dynamic iron core, a static iron core, coils, a concentrating flux plate and a magnetic yoke, which is characterized in that a push rod is pivotally arranged on the upper end portion of the magnetic yoke, one end of the spring is connected with the adjusting rod while the other end is connected to the push rod, and the upper end of the iron core is movably connected with the push rod after penetrating through the concentrating flux plate. The utility model has the advantages that the length of the spring can be adjusted by the knob to realize linear adjustment of action current settings of short circuit, an adjusting screw component arranged on the magnetic yoke is capable of slightly adjusting magnetic gap, thereby eliminating inconsistency of current setting values of various phases of the trip device caused by parts and assembly, ensuring consistency of original conditions of various phases of the trip device, and realizing multi-gear adjustment and decreasing specification of springs by extendedly arranging at least one hook on the push rod.

Description

Solenoid type electromagnetic trip

Technical field

The utility model relates to a kind of breaker of plastic casing solenoid type electromagnetic trip, is to the improvement of existing solenoid type electromagnetic trip structure, belongs to the low voltage electrical apparatus technology field.

Background technology

At present, existing solenoid type electromagnetic trip, its structure is disclosed by Fig. 1, it mainly comprises moving iron core 4, static iron core 41, spring 3, coil 44, yoke 5, described spring 3 is installed between moving iron core 4 and the static iron core 41, and be arranged on plastic sheath 43 inside that are used to make insulation between dynamic and

static iron core

4,41 and the coil 44, the deficiency that this structure exists is: the setting value of short circuit operating current is non-adjustable.

Again, U.S.'s patent of invention numbers 5467069 discloses " a kind of adjustable release unit ", what this patented technology adopted is the solenoid type electromagnetic trip that is made of moving iron core, static iron core, magnetic conductive board, yoke, and its problem to be solved is: realize the adjusting of circuit breaker instantaneous trip current setting by regulating gap between the dynamic and static iron core.But one of shortcoming that exists, because the adjusting of magnetic gap is not easy control, and the linearity is bad, reality during streamline is produced in batches disposable qualification rate very low; Shortcoming two, because the influence of aspects such as part tolerance and assembling, be easy to cause in the circuit breaker the inconsistent of initial condition between each phase release.

Summary of the invention

The purpose of this utility model is the adjustable and solenoid type electromagnetic trip that can realize linear regulation of setting value that a kind of short circuit operating current will be provided.

The purpose of this utility model is achieved like this: a kind of solenoid type electromagnetic trip, comprise knob, adjusting rod, spring, moving iron core, static iron core, coil, magnetic conductive board, and yoke, described knob is installed on the interior support of circuit breaker pedestal, described adjusting rod hub setting contacts on described support and with knob, coil is arranged on the inside of yoke, static iron core is fixed on the bottom of yoke and places in the coil, moving iron core is positioned at the top of static iron core and can moves up and down in coil, the magnetic conductive board cap seal is on the top of yoke, be characterized in: also comprise the push rod of a hub setting in the yoke upper end, one end of described spring is connected with adjusting rod, the other end of spring is connected with push rod, and the upper end of described moving iron core constitutes flexible connection with push rod after passing magnetic conductive board.

Extended push rod on the push rod described in the utility model, described push rod contacts with support component.

Support component described in the utility model is a bending, and this bending is arranged on the top of yoke, is used for contacting with described push rod.

Support component described in the utility model is an adjustment screw, and this adjustment screw is made up of nut, screw, and nut is fixed on the top of yoke, and screw contacts with described push rod after passing nut, yoke.

The bottom of knob described in the utility model is provided with screw inclined plane.

The utility model has extended a projection on described adjusting rod, adjusting rod contacts by the screw inclined plane of projection with described knob bottom.

The utility model has also extended first hook on described adjusting rod, an end of described spring is connected on described first hook.

Push rod described in the utility model is provided with at least one second hook, and the other end of described spring is connected on described second hook.

Spring described in the utility model is extension spring.

The utility model is equipped with a minor axis in the end, upper end of described moving iron core, and on described push rod, offer sliding tray, minor axis places in the sliding tray, can realize the upper end of moving iron core and the flexible connection between the push rod by being slidingly matched between minor axis and the sliding tray.

The utility model is because after adopting said structure, one of advantage that has, the length of coming regulating spring by knob, adjusting rod, realize the adjusting of short circuit operating current setting value, because spring force is directly proportional (f=kx) with spring length, therefore realized the linear regulation of short circuit operating current setting value; Advantage two, by adjustment screw is set on yoke, can finely tune magnetic gap, eliminated inconsistent by part itself, each phase release current setting of causing of assembling, guaranteed the consistency of each phase release initial condition; Advantage three, by on push rod, extending at least one hook, according to principle of moment balance, when coil flows through big electric current, the suction of dynamic and static iron core is big, and spring can be hung on the long hook of the arm of force, and when coil flows through little electric current, the suction of dynamic and static iron core is little, spring can be hung on the short hook of the arm of force, therefore, has reduced the specification of spring when realizing many grades of adjustings.

Description of drawings

Fig. 1 is the partial sectional view of solenoid type electromagnetic trip in the prior art.

Fig. 2 is the structural representation of the preferred solenoid type electromagnetic trip of the utility model.

Fig. 3 is the cutaway view of the preferred solenoid type electromagnetic trip of the utility model.

Fig. 4 is an application examples schematic diagram of the present utility model.

Embodiment

For make your auditor particularly the public can be well understood to structure essence of the present utility model and effective effect thereof more; the spy reaches embodiment in conjunction with the accompanying drawings embodiment of the present utility model is described in detail as follows; but all descriptions to embodiment all do not constitute the restriction to the technical solution of the utility model, and are any pro forma but not substantial equivalence is replaced or notion changes and all should be considered as technical scheme scope disclosed in the utility model and the prescription protection.

Embodiment

See also Fig. 2 and in conjunction with Fig. 3, the utility model solenoid type electromagnetic trip mainly comprises knob 1, adjusting rod 2, spring 3, moving iron core 4, static iron core 41, plastic sheath 43, coil 44, magnetic conductive board 45, yoke 5, push rod 7 and support component.Described knob 1 is installed on the interior support 6 of circuit breaker pedestal, is provided with screw inclined plane 11 in the bottom of knob 1.The hub setting rotationally of described adjusting rod 2 is on support 6, radially extended a projection 21 in the middle part of a side at adjusting rod 2, adjusting rod 2 contacts by the screw inclined plane 11 of projection 21 with described knob 1 bottom, on adjusting rod 2 opposite side radially, also extend an end that is useful on ammunition feed spring 3 and collude first hook 22 of joining, the quantity of described first hook 22 is identical with the number of poles of circuit breaker, illustrated among the figure that the quantity of first hook 22 is four, can be applicable on the four-pole circuit breaker, and for one pole, two utmost points, three-pole breaker, as long as change the quantity of first hook 22 on the adjusting rod 2, as single-pole circuit breaker, it is one corresponding to the quantity of the hook of first on the adjusting rod 2 22; Two utmost point circuit breakers are two corresponding to the quantity of first on the adjusting rod 2 hook 22 ... the rest may be inferred.Described coil 44 is arranged on the inside of yoke 5, one end of coil 44 is connected with first joint cover 12, the other end of coil 44 is connected with second joint cover 13, first joint cover 12 is used for realizing being electrically connected with subscriber's line, second joint cover 13 is used for realizing being electrically connected with the contact system (belong to known technology, omit among the figure) of circuit breaker.Described static iron core 41 is fixed on the bottom of yoke 5 and places in the coil 44, moving iron core 4 is positioned at the top of static iron core 41 and can moves up and down in coil 44 inside corresponding to static iron core 41, and the upper end of moving iron core 4 realizes flexibly connecting with push rod 7 in magnetic conductive board 45 backs at yoke 5 tops passing cap seal.Described plastic sheath 43 has been used for insulating effect every being located between coil 44 and the dynamic and

static iron core

4,41; Described push rod 7 passes through axle 74 hub settings rotationally at push rod 7 two ends in the upper end of yoke 5, is provided with push rod 71 on the top of push rod 7, is provided with a pair of second hook 72 and the sliding tray 73 on a side side of push rod 7, and push rod 71 contacts with support component.Described support component can be a bending 51, and this bending 51 is arranged on the top of yoke 5, is used for contacting with described push rod 71; Described support component also can be adjustment screw 52, this adjustment screw 52 is made up of nut 521, screw 522, nut 521 is fixed on the top of yoke 5, screw 522 contacts with described push rod 71 after passing nut 521, yoke 5, and support component of the present utility model is preferably adjustment screw 52.First hook 22 that extends on one end of described spring 3 and the adjusting rod 2 is connected, a pair of second on the other end of spring 3 and the push rod 7 linked up with arbitrary second in 72 and linked up with 72 and be connected.The end of described moving iron core 4 is equipped with a minor axis 42, this minor axis 42 hold in the sliding tray 73 that fits on the push rod 7 and between the two structure for being slidingly matched.

Application examples

See also Fig. 4, clockwise adjusting knob 1, adjusting rod 2 rotates counterclockwise with the hub setting center, makes spring 3 elongations, and according to f=kx, the counter-force f that spring 3 provides increases, and push rod 7 keeps balance under the acting in conjunction of spring 3 and adjustment screw 52.When circuit breaker is installed on the subscriber's line, electric current flows through the coil 44 of release inside, make the moving of coil 44 inside,

static iron core

4,41 produce electromagnetic attraction, when circuit is short-circuited fault, the electromagnetic attraction that short-circuit current produces is greater than the spring counter-force, moving iron core 4 moves downward, the minor axis 42 of moving iron core 4 ends slides in the sliding tray 73 of push rod 7, and driving push rod 7 is that the center rotates counterclockwise with axle 74, the draw bar 8 that the push rod 71 that extends on the push rod 7 is finally actuated circuit breaker is that the center clockwise rotates with draw bar axle center 81, make lever 9 actions that cooperate with draw bar 8, thereby drive circuit breaker operation mechanism and (belong to known technology, omit among the figure) release, circuit breaker trip.

The utility model has been determined the suction of 4,41 of dynamic and static iron cores by the size of current that flows through coil 44, the suction that dynamic and static iron core is 4,41 will overcome the spring counter-force could finally make circuit breaker trip, therefore, come the length of regulating spring 3 by adjusting knob 1, to realize adjusting, promptly to the adjusting of short circuit operating current value size to the circuit breaker trip current setting.Similarly, by rotating the screw 522 of adjustment screw 52, making push rod 7 is the center fine motion with axle 74, drive moving iron core 4 fine motions, thereby reach the purpose of fine setting magnetic gap, elimination is inconsistent by part itself, each phase release current setting of causing of assembling, has guaranteed the consistency of each phase release initial condition.

Claims

1, a kind of solenoid type electromagnetic trip, comprise knob (1), adjusting rod (2), spring (3), moving iron core (4), static iron core (41), coil (44), magnetic conductive board (45), and yoke (5), described knob (1) is installed on the interior support (6) of circuit breaker pedestal, described adjusting rod (2) hub setting upward and with knob (1) contacts at described support (6), coil (44) is arranged on the inside of yoke (5), static iron core (41) is fixed on the bottom of yoke (5) and places in the coil (44), moving iron core (4) is positioned at the top of static iron core (41) and can moves up and down in coil (44), magnetic conductive board (45) cap seal is on the top of yoke (5), it is characterized in that also comprising the push rod (7) of a hub setting in yoke (5) upper end, one end of described spring (3) is connected with adjusting rod (2), the other end of spring (3) is connected with push rod (7), and the upper end of described moving iron core (4) constitutes flexible connection with push rod (7) after passing magnetic conductive board (45).

2, solenoid type electromagnetic trip according to claim 1 is characterized in that having extended push rod (71) on the described push rod (7), and described push rod (71) contacts with support component.

3, solenoid type electromagnetic trip according to claim 2 is characterized in that described support component is a bending (51), and this bending (51) is arranged on the top of yoke (5), is used for contacting with described push rod (71).

4, solenoid type electromagnetic trip according to claim 2, it is characterized in that described support component is adjustment screw (52), this adjustment screw (52) is made up of nut (521), screw (522), nut (521) is fixed on the top of yoke (5), and screw (522) contacts with described push rod (71) after passing nut (521), yoke (5).

5, solenoid type electromagnetic trip according to claim 1 is characterized in that the bottom of described knob (1) is provided with screw inclined plane (11).

6, solenoid type electromagnetic trip according to claim 1 or 5 is characterized in that having extended a projection (21) on described adjusting rod (2), adjusting rod (2) contacts by the screw inclined plane (11) of projection (21) with described knob (1) bottom.

7, solenoid type electromagnetic trip according to claim 1 is characterized in that also having extended first hook (22) on described adjusting rod (2), an end of described spring (3) is connected on described first hook (22).

8, solenoid type electromagnetic trip according to claim 1 is characterized in that described push rod (7) is provided with at least one second hook (72), and the other end of described spring (3) is connected on described second hook (72).

9, solenoid type electromagnetic trip according to claim 1 is characterized in that described spring (3) is extension spring.

10, solenoid type electromagnetic trip according to claim 1, it is characterized in that a minor axis (42) being installed in the end, upper end of described moving iron core (4), and on described push rod (7), offer sliding tray (73), minor axis (42) places in the sliding tray (73), can realize the end of moving iron core (4) and the flexible connection between the push rod (7) by being slidingly matched between minor axis (42) and the sliding tray (73).