CN201387861Y

CN201387861Y - Hydraulic electromagnetic breaker

Info

Publication number: CN201387861Y
Application number: CN 200920070857
Authority: CN
Inventors: 丁飞; 李晨辉; 李霞
Original assignee: Shanghai Liangxin Electrical Co Ltd
Current assignee: Shanghai Liangxin Electrical Co Ltd
Priority date: 2009-04-21
Filing date: 2009-04-21
Publication date: 2010-01-20
Anticipated expiration: 2019-04-21

Abstract

A hydraulic electromagnetic breaker consists of a shell, a connecting terminal, an electromagnetic coil, a manipulator and armature iron, wherein the electromagnetic coil is provided with an oil damper. A movable contact arm, a folding connecting rod and a crank constitute a three-rod structure and the folding connecting rod maintains unfolding state when locked by a spring and a lock catch. When the manipulator is in closing state, a movable contact and a static contact are closed and load current passes through the electromagnetic coil. When over current or short-circuit current appears, the electromagnetic coil generates electromagnetic force, subsequently a movable core in the oil damper attracts the armature iron to move and one end of the armature iron strikes a projecting pin on the lock catch to rotate the lock catch, thus releasing the folding connecting rod from the locking state. Consequently, the folding connecting rod is folded and drives the crank and the movable contact arm to rotate respectively; and when the manipulator rotates to an opening position, the movable contact is separated from the static contact. The breaker uses the movable core in the oil damper to generate greater electromagnetic force, thus pulling in the armature iron and triggering a mechanical tripping mechanism to act. Besides, the tripping process is not influenced by ambient temperature and is high in reliability.

Description

Hydraulic electromagnetic breaker

Technical field:

The utility model relates to electricity field, relates in particular to circuit breaker, particularly a kind of hydraulic electromagnetic breaker.

Background technology:

In the prior art, be provided with a bimetal leaf of connecting with circuit in the Thermomagnetic type circuit breaker, the heat that is generated by electric current during overload makes the bimetallic distortion, thereby makes circuit breaker tripping.Also be provided with a solenoid that can be communicated with load current and voltage in addition, solenoid be wrapped in a coil rack around, a movable core is arranged in the skeleton, move under the action of a magnetic field that iron core can produce around the coil.The device that utilizes the bimetal leaf heating to be out of shape can be subjected to the influence of variation of ambient temperature.In a cold environment, work, need bigger electric current just to thread off, thereby jeopardize safety; And when working in the environment of a heat, their can be threaded off under less current, and cause the unnecessary disconnection of circuit;

Summary of the invention:

The purpose of this utility model is to provide a kind of hydraulic electromagnetic breaker, and described this hydraulic electromagnetic breaker will solve the technical problem that the Thermomagnetic type circuit breaker is influenced by variation of ambient temperature in the prior art.

This hydraulic electromagnetic breaker of the present utility model is by housing, one first binding post, one second binding post, solenoid, operator and armature constitute, described first binding post, second binding post, solenoid, operator and armature all are arranged in the housing, the handle end of operator extends to outside the leading flank of housing, wherein, extend on described first binding post and be provided with a fixed contact, described second binding post is connected with an end of described solenoid by lead, be provided with a moving contact arm in the housing, the cross section of described moving contact arm is the U type, be provided with a moving contact arm axle in the moving contact arm, one end of moving contact arm is provided with a moving contact, the other end of moving contact arm is connected with the other end of solenoid by lead, be provided with a support in the housing, two of described support in opposite directions sidewall be parallel to each other, solenoid is fixed on the end face of support, the other end of moving contact arm is connected with an end of support by one first, be arranged with one first spring on described first, one end of described first spring acts on the support, the other end of first spring acts on the moving contact arm axle, part in the operator housing is provided with a crank, described crank is connected with the other end of support by one second, described second is provided with one second spring, the stiff end of described second spring is hooked on the support, the movable end of second spring acts on the face of crank, be provided with an oil damper in the solenoid, be provided with the 3rd spring in the described oil damper, movable core and silicone oil, described armature is arranged on outside the front end end face of solenoid, armature is connected with support by one the 3rd, be provided with one the 4th spring between armature and the support, be provided with a folding connecting rod in the housing, described folding connecting rod is connected and composed by bearing pin by a tripping and a connecting plate, described tripping is connected with crank by rivet or pivot pin, described connecting plate is connected with the moving contact arm by rivet or pivot pin, the rear end of tripping is connected with a snap close by one the 4th, described snap close is provided with a protruding pin, is provided with one the 5th spring between snap close and the folding connecting rod.

Further, the front end of described oil damper is provided with a pole shoe.

Further, be provided with a groove in the trailing flank of described housing.

Further, be provided with a plate washer in the described groove.

Concrete, the oil damper in the utility model adopts known technology of the prior art, relevant above-mentioned known solution, and those skilled in the art all understands, and does not repeat them here.

Operation principle of the present utility model is: moving contact arm, folding connecting rod and crank constitute one three bar structure, and folding connecting rod keeps deployed condition under the 5th spring and snap close locking.Under the operator "on" position, moving contact, fixed contact closure, load current is through solenoid.When overcurrent or short circuit current occurring, solenoid produces electromagnetic force, movable core in the oil damper attracts armature to move, one end of armature impacts the protruding pin on the snap close, and snap close rotates, thereby removes the lock-out state of folding connecting rod, folding connecting rod is folding, drive crank and moving contact arm and rotate respectively, operator turns to the separating brake position, and moving contact separates with fixed contact.

The utility model is compared with prior art, and its effect is actively with tangible.The utility model is provided with oil damper in electro-magnetic circuit breaker, utilize the bigger electromagnetic force of movable core generation in the oil damper, thereby adhesive armature triggers the mechanical trip mechanism action, and the dropout process is not influenced by ambient temperature, the reliability height.

Description of drawings:

Fig. 1 is the structural representation of hydraulic electromagnetic breaker of the present utility model under "on" position.

Fig. 2 is the structural representation of the opposite one side of the hydraulic electromagnetic breaker among Fig. 1.

Fig. 3 is the structural representation of hydraulic electromagnetic breaker of the present utility model under gate-dividing state.

Fig. 4 is the structural representation of hydraulic electromagnetic breaker of the present utility model under operator combined floodgate, moving contact and fixed contact off-state.

Embodiment:

Embodiment 1:

As Fig. 1, Fig. 2, Fig. 3 and shown in Figure 4, hydraulic electromagnetic breaker of the present utility model is by housing, one first binding post 20, one second binding post 22, solenoid 18, operator 32 and armature 26 constitute, described first binding post 20, second binding post 22, solenoid 18, operator 32 and armature 26 all are arranged in the housing, housing is made up of the separable housing 12 and the separable housing 14 of equal portions, the handle end of operator 32 extends to outside the leading flank of housing, wherein, extend on described first binding post 20 and be provided with a fixed contact 201, described second binding post 22 is connected with an end of described solenoid 18 by lead 31, be provided with a moving contact arm 24 in the housing, the cross section of described moving contact arm 24 is the U type, be provided with a moving contact arm axle 56 in the moving contact arm 24, one end of moving contact arm 24 is provided with a moving contact 241, the other end of moving contact arm 24 is connected with the other end of solenoid 18 by lead 30, be provided with a support 35 in the housing, a sidewall 351 of described support 35 is parallel in opposite directions with a sidewall 352, solenoid 18 is fixed on the end face 353 of support 35, the other end of moving contact arm 24 is connected with an end of support 35 by one first 52, be arranged with one first spring 64 on described first 52, one end of described first spring 64 acts on the support 35, the other end of first spring 64 acts on the moving contact arm axle 56, part in operator 32 housings is provided with a crank 321, described crank 321 is connected with the other end of support 35 by one second 50, described second 50 is provided with one second spring 60, the stiff end of described second spring 60 is hooked on the support 35, the movable end of second spring 60 acts on the face 322 of crank 321, be provided with an oil damper 36 in the solenoid 18, be provided with the 3rd spring in the described oil damper 36, movable core 25 and silicone oil, described armature 26 is arranged on outside the front end end face of solenoid 18, armature 26 is connected with support 35 by one the 3rd 54, be provided with one the 4th spring 62 between armature 26 and the support 35, be provided with a folding connecting rod in the housing, described folding connecting rod is connected and composed by bearing pin 58 by a tripping 27 and a connecting plate 28, described tripping 27 is connected with crank 321 by rivet or pivot pin 57, described connecting plate 28 is connected with moving contact arm 24 by rivet or pivot pin 59, the rear end of tripping 27 is connected with a snap close 38 by one the 4th, described snap close 38 is provided with a protruding pin 381, is provided with one the 5th spring 66 between snap close 38 and the folding connecting rod.

Further, the front end of described oil damper 36 is provided with a pole shoe 37.

Further, be provided with a groove 15 in the trailing flank of described housing.

Further, be provided with a plate washer 16 in the described groove 15.

Operation principle of the present utility model is: moving contact arm 24, folding connecting rod and crank 321 constitute one three bar structure, and folding connecting rod keeps deployed condition under the 5th spring 66 and snap close 38 lockings.Under operator 32 "on" positions, moving contact 241, fixed contact 201 closures, load current is through solenoid 18.When overcurrent or short circuit current occurring, solenoid 18 produces electromagnetic force, movable core 25 in the oil damper 36 attracts armature 26 to move, one end 261 of armature 26 impacts the protruding pin 381 on the snap close 38, and snap close 38 rotates, thereby removes the lock-out state of folding connecting rod, folding connecting rod is folding, drive crank 321 and moving contact arm 24 and rotate respectively, operator 32 turns to the separating brake position, and moving contact 241 separates with fixed contact 201.

Concrete, in an embodiment of the present utility model, separable housing 12 and the 14 usefulness insulating material moldings of separable housing form, as thermoset plastics, and perhaps materials similar.Comprise a groove 15 in the housing, be used for installing the auxiliary contact annex.When the auxiliary contact annex is not installed, can insert plate washer 16, to guarantee its degree of protection.Circuit breaker has binding post 20 and binding post 22, and binding post 20 has extended a fixed contact 201, and binding post 22 and solenoid 18 link together.

Moving contact 241 is installed on the moving contact arm 24.The lead 30 that is flexible coupling couples together an end of moving contact arm 24 and solenoid 18, and the lead 31 that is flexible coupling of analog material is connected with an other end of terminal 22 and solenoid 18.When the dynamic/static contact closure and overcurrent occurs or during short circuit current, the electromagnetic force that is produced by solenoid 18 can be with the position of armature 26 from the position adhesive of Fig. 1 to Fig. 3, thereby make contact 201 and opened in 241 minutes.Movable core 25 is because the effect of spring force is in the below of solenoid 18, as shown in Figure 1.Having under the situation of overcurrent, the movable core 25 as dotted portion among Fig. 3 overcomes spring force and moves upward under the effect of magnetic force, so that attract armature 26.

During separating brake, moving contact arm 24 is in the position as the inclination of Fig. 3 and 4, can stir operator 32, make circuit breaker from the state of Fig. 3 to Fig. 1 and Fig. 2 state.The closing motion of contact is realized by the three bar structures that comprise moving contact arm 24.The crank section 321 of three bar structure folding connecting rods and operator 32.Folding connecting rod was realized with being connected by rivet or pivot pin of crank 321 of moving contact arm 24 and operator 32.As shown in Figure 3, operator 32 and its crank section 321 are in the disjunction position under the effect of second spring 60 that resets, second spring 60 is wrapped on second 50, and the stiff end of second spring 60 is hooked on the support 35, and the face 322 on the crank 321 of movable end and operator 32 contacts.

Solenoid 18 is fixed on the support 35, and support has two parallel sidewalls 351 and sidewall 352, and is as illustrated in figs. 1 and 2.Pass the hole of sidewall 351 and sidewall 352 end portions for first 52 and rotate around first 52 so that support moving contact arm 24; Pass the hole of sidewall 351 and sidewall 352 upper parts for second 50 so that be used for the crank section 321 of support operation device 32; This support has formed the part of an electromagnetic mechanism.The electromagnetic mechanism device also comprises an oil damper 36, its the inside comprises the 3rd spring, above-mentioned movable core 25, and silicone oil, and movable core 25 is postponed by silicone oil when motion, thereby the situation of overcurrent is being arranged, making actuating mechanism play the effect of a delay.The 4th spring 62 is adjustable springs, is used for adjusting in advance the tripping force value of armature 26 and the effect that after electromagnetic force disappears armature 26 is resetted, and it also can play the effect of a delay to the tripping mechanism of circuit breaker.

Support 35 also has an end face 353 to be used for supporting solenoid 18, and this solenoid 18 is to be wrapped in above the skeleton of an insulation by traditional mode.This skeleton is a permeability magnetic material, has the pole shoe 37 of a same permeability magnetic material to be arranged on oil damping pipe top, and it is used for strengthening the magnetic conduction between iron core 25 and the armature 26.

Concrete again, three bar structures comprise crank section 321 and folding connecting rod of being made up of tripping 27 and connecting plate 28 of moving contact arm 24, operator 32.The tripping 27 and the connecting plate 28 of folding connecting rod are fixed together by bearing pin 58.The closing position of operator 32 from Fig. 1 moves to the disjunction position (showing as Fig. 1 and 3) among Fig. 3, and tripping 27 in the folding connecting rod and connecting plate 28 are as a mass motion.Circuit breaker among Fig. 1 is in the close position.Make circuit breaker be in the position of disconnection, can stir operator 32 from the position of Fig. 3 the position to Fig. 1, and tripping 27 in the folding connecting rod and connecting plate 28 are maintained at a suitable position once more as a mass motion.Suppose that the contact of circuit breaker is in the make position of Fig. 1 and 2, under the situation that overload or short circuit current are arranged, armature 26 is postponing under a period of time or the short circuit current situation almost immediately by pole shoe 37 adhesives under the overload current situation.Armature 26 is axially to be installed on the 3rd 54, and it can rotate to pole shoe 37 directions around the 3rd 54.Also be mounted in for the 3rd 54 on two the parallel sidewalls 351 and sidewall 352 of support 35, and armature 26 is between these two metallic plates.Suction between pole shoe 37 and armature 26 can cause that armature 26 is done around the 3rd 54 and rotate counterclockwise, as the solid line position from Fig. 4 to dotted line position.At this moment, the end 261 of armature will impact the protruding pin 381 on the snap close 38, make that tripping 27 and the locking-in state of connecting plate 28 from Fig. 1 to Fig. 3 in the folding connecting rod moves to released state among Fig. 4.The position that protruding pin 381 will show from Fig. 1 is transformed into the position that shows among Fig. 3.Moving contact arm 24 is returned to open position under the effect of first spring 64, these first spring, 64 1 ends act on the below of support 35, an other end is installed on the moving contact arm axle 56 that passes on the moving contact arm 24, the cross section of this moving contact arm 24 is " U " shape, has some perforates that first 52 and moving contact arm axle 56 are installed on two metallic plate.

As shown in Figure 1-Figure 3, the folding connecting rod inside of being made up of tripping 27 and connecting plate 28 has one the 5th spring 66 to be used for making snap close 38 to be in a normal state (keyed state).It can guarantee that this folding connecting rod is remaining an integral body in motion by the off-state (or moved to by the off-state of Fig. 3 Fig. 1 closure state) that the closure state of Fig. 1 moves to Fig. 3.

The position of Fig. 4 is, moving contact arm 24 is at the state of opening, and operator 32 is at the state that closes a floodgate, and folding connecting rod is at the state of release, and the disconnection of this situation is causing by the overload current situation.This moment, operator 32 still was in the state of combined floodgate, but fixed contact of circuit breaker 241 and moving contact 201 separate, and the dropout of this circuit breaker is called " trip free ".Tripping 27 and connecting plate 28 are in folded state among Fig. 4, make three bar structure disequilibriums, thereby cause that actuating mechanism threads off.Can contrast Fig. 1 and see, the pivot pin 59 at moving contact arm 24 places and be installed in bearing pin 58 between folding connecting

rod

27 and 28 and the pivot pin 57 at crank section 321 places of operator 32 in alignment substantially.By with the comparison of Fig. 4, pin pin 58 is transferred to pivot pin 57 upper right side in alignment at pivot pin 59 on the moving contact arm 24 and crank section 321 places.Yet, as long as armature 26 still at the dotted line position of Fig. 4, even operator 32 turns back to the disjunction position from combined floodgate, is got back to its home position though can drive folding connecting rod.But when operator 32 was dialled the position of bout lock again, folding connecting rod can fold once more, as shown in Figure 4.Because the pin on the snap close 38 381 can contact once more with the lower end 261 of armature 26, cause folding connecting rod to be in folded state once more.Have only when armature 26 and under the counter-force effect of the 4th spring 62, get back to solid line position among Fig. 4, stir operator 32 and just can make mechanism kinematic arrive make position.

Claims

1. hydraulic electromagnetic breaker, by housing, one first binding post, one second binding post, solenoid, operator and armature constitute, described first binding post, second binding post, solenoid, operator and armature all are arranged in the housing, the handle end of operator extends to outside the leading flank of housing, it is characterized in that: extension is provided with a fixed contact on described first binding post, described second binding post is connected with an end of described solenoid by lead, be provided with a moving contact arm in the housing, the cross section of described moving contact arm is the U type, be provided with a moving contact arm axle in the moving contact arm, one end of moving contact arm is provided with a moving contact, the other end of moving contact arm is connected with the other end of solenoid by lead, be provided with a support in the housing, two of described support in opposite directions sidewall be parallel to each other, solenoid is fixed on the end face of support, the other end of moving contact arm is connected with an end of support by one first, be arranged with one first spring on described first, one end of described first spring acts on the support, the other end of first spring acts on the moving contact arm axle, part in the operator housing is provided with a crank, described crank is connected with the other end of support by one second, described second is provided with one second spring, the stiff end of described second spring is hooked on the support, the movable end of second spring acts on the face of crank, be provided with an oil damper in the solenoid, be provided with the 3rd spring in the described oil damper, movable core and silicone oil, described armature is arranged on outside the front end end face of solenoid, armature is connected with support by one the 3rd, be provided with one the 4th spring between armature and the support, be provided with a folding connecting rod in the housing, described folding connecting rod is connected and composed by bearing pin by a tripping and a connecting plate, described tripping is connected with crank by rivet or pivot pin, described connecting plate is connected with the moving contact arm by rivet or pivot pin, the rear end of tripping is connected with a snap close by one the 4th, described snap close is provided with a protruding pin, is provided with one the 5th spring between snap close and the folding connecting rod.

2. hydraulic electromagnetic breaker as claimed in claim 1 is characterized in that: the front end of described oil damper is provided with a pole shoe.

3. hydraulic electromagnetic breaker as claimed in claim 1 is characterized in that: be provided with a groove in the trailing flank of described housing.

4. hydraulic electromagnetic breaker as claimed in claim 3 is characterized in that: be provided with a plate washer in the described groove.