CN204242978U - Overcurrent magnetictrip - Google Patents

Overcurrent magnetictrip Download PDF

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Publication number
CN204242978U
CN204242978U CN201420642834.8U CN201420642834U CN204242978U CN 204242978 U CN204242978 U CN 204242978U CN 201420642834 U CN201420642834 U CN 201420642834U CN 204242978 U CN204242978 U CN 204242978U
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CN
China
Prior art keywords
armature
magnetictrip
push rod
yoke
yoke frame
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN201420642834.8U
Other languages
Chinese (zh)
Inventor
赵芳帅
袁端磊
朱志豪
王海燕
李禹生
董祥渊
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Henan high General Electric Co., Ltd.
Original Assignee
State Grid Corp of China SGCC
Pinggao Group Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by State Grid Corp of China SGCC, Pinggao Group Co Ltd filed Critical State Grid Corp of China SGCC
Priority to CN201420642834.8U priority Critical patent/CN204242978U/en
Application granted granted Critical
Publication of CN204242978U publication Critical patent/CN204242978U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The utility model provides a kind of overcurrent magnetictrip, the armature controlling correspondence system dropout separating brake and the back-moving spring driving armature to move down reset is moved up when being included in system line short circuit current flow, also comprise the yoke frame of annular, yoke frame have circumferential ring wall and by extending along the longitudinal direction of surrounding of circumferential ring wall for system line through with the centre bore forming electromagnet, the internal face of yoke top of the trellis ring wall is provided with breach, and described armature along the vertical direction guiding movement is assemblied in described upper breach.Magnetictrip provided by the utility model, installs yoke frame additional to improve the electromagnetic attraction in whole release suffered by armature, expands its range of application, and the Miniaturization Design being conducive to release makes.

Description

Overcurrent magnetictrip
Technical field
The utility model relates to a kind of overcurrent magnetictrip.
Background technology
Magnetictrip due to its structural principle simple, cost is lower, is used widely in mesolow field.The back-moving spring that magnetictrip comprises the electromagnet be coiled into by system line, the armature driving breaker mechanism to thread off by transmission mechanism and drives armature to reset, when system line is by normal current, the electromagnetic force that electromagnet produces is less than the reaction force that back-moving spring provides, armature can not by electromagnetic actuation, and circuit breaker normally runs.And when short trouble appears in system, short circuit current exceedes the several times of normal current, the electromagnetic force that electromagnet produces is greater than the reaction force that back-moving spring provides, and armature movement, makes breaker mechanism thread off by transmission mechanism.Circuit breaker realizes separating brake under the effect of tripping spring, and then plays the effect of short-circuit protection.After breaker open operation, electromagnetic force disappears, and under back-moving spring reaction, release returns to initial position.
But the electric current in the electromagnet of existing magnetictrip is less, the active force that electromagnet acts on armature is less, mainly be applicable in low capacity power equipment, if and when magnetictrip is used in large-capacity power equipment, electromagnet needs the large especially electromagnetic attraction very large with generation done to meet the action request of large-capacity power equipment, causes whole magnetictrip volume excessive.
Utility model content
The utility model provides a kind of overcurrent magnetictrip, to solve the technical problem needing the electromagnet making larger volume to cause release volume excessive when magnetictrip in prior art is applied to large-capacity power equipment.
The technical scheme of overcurrent magnetictrip provided by the utility model is: a kind of overcurrent magnetictrip, the armature controlling correspondence system dropout separating brake and the back-moving spring driving armature to move down reset is moved up when being included in system line short circuit current flow, also comprise the yoke frame of annular, yoke frame have circumferential ring wall and by extending along the longitudinal direction of surrounding of circumferential ring wall for system line through with the centre bore forming electromagnet, the internal face of yoke top of the trellis ring wall is provided with breach, described armature along the vertical direction guiding movement is assemblied in described upper breach.
Described upper breach from the internal face of yoke top of the trellis ring wall run through along the vertical direction extend to yoke top of the trellis ring wall outside wall surface.
Described armature is up-small and down-big triangle, and described upper breach is the up-small and down-big dihedral breach corresponding with triangle armature, leaves for armature free gap movable in dihedral breach between dihedral breach and triangle armature.
On described yoke frame, guiding movement is equipped with push rod along the vertical direction, push rod upper end has the pushing tow face coordinated with the upper end pushing tow of described armature down, described back-moving spring along the vertical direction guiding movement is assemblied on described yoke frame, described yoke frame is provided with the ventricumbent fixing spring seat of block, and press-fit is pushed up in described push rod lower end and described back-moving spring lower end.
The bottom ring wall of described yoke frame is provided with described upper breach corresponding position the installation through hole extended along the vertical direction, and described push rod is installed in described installation through hole, and described fixing spring seat and back-moving spring are all arranged in described installation through hole.
Described armature is provided with the through hole extended along the vertical direction, described push rod is through described through hole, the top passing described through hole at push rod is installed with dropout jacking block, and the downside of dropout jacking block is the pushing tow face coordinated with the upper surface pushing tow of described armature that described push rod upper end has.
Be provided with the guide frame that guide direction extends along the vertical direction between described dropout jacking block and described yoke frame, guide frame coordinates with described dropout jacking block spline in push rod circumference.
Described push rod has the middle part bar section of the centre bore through described yoke frame, the limiting plate arranged successively from the top down along the vertical direction and insulating case is set with outside bar section in the middle part of this, insulating case lower end coordinates with the bottom ring wall block of the yoke frame of described annular, described limiting plate upper end and the press-fit of described armature support top.
The lower end of described push rod is set with movable spring seat, push rod is set with below movable spring seat the pointer being used to indicate magnetictrip operating current and the adjusting nut for adjusting back-moving spring thrust successively.
The peripheral outer wall face of described yoke frame is provided with for installing adjustment yoke iron block to adjust the installation gap of yoke frame magnetic force.
The beneficial effects of the utility model are: in overcurrent magnetictrip provided by the utility model, by armature along the vertical direction guiding movement be assemblied in the upper breach that yoke frame is provided with, during use, system line is penetrated in the centre bore of the yoke frame of annular to form electromagnet, when passing through normal current in system line, the electromagnetic force that system line and yoke frame produce is less than the opposition of back-moving spring, and armature is failure to actuate.And when system line is by short circuit current, because yoke frame has high magnetic conductivity, yoke frame effectively can improve the electromagnetic attraction acted on armature, thus can armature be driven at the active force overcoming back-moving spring to move up, and then control dropout separating brake.Magnetictrip provided by the utility model, installs yoke frame additional to improve the electromagnetic attraction in whole release suffered by armature, expands its range of application, and the Miniaturization Design being conducive to release makes.
Further, upper breach extends to the outside wall surface of yoke top of the trellis ring wall from the internal face of yoke top of the trellis ring wall along the vertical direction, is convenient to processing and fabricating on the one hand, also effectively can ensure the electromagnetic attraction of yoke frame to armature on the other hand.
Further, upper armature is triangle, upper breach is corresponding dihedral breach, when system line passes into short circuit current, armature is subject to electromagnetic attraction and moves up, along with the free gap between dihedral breach and triangle armature is more and more less, the electromagnetic attraction that armature is subject to is increasing, the armature speed that moves up is also increasing, reduces the armature movement time, improves release efficiency of movement.
Further, on yoke frame, guiding movement is equipped with push rod along the vertical direction, and by the cooperation of push rod and armature and back-moving spring, thus back-moving spring is to the reset drives of armature, and adopt push rod as drive mechanism, structure is simple, reliable in action.
Further, push rod realizes coordinating with the transmission of armature by dropout jacking block, and adopt machine driving, transmission is reliable rapidly.
Further, guide frame between dropout jacking block and yoke frame, and then the moving direction guiding dropout jacking block and push rod, meanwhile, carry out spline by guide frame to dropout jacking block and push rod spacing, prevent rotational action by mistake.
Further, the intermediate pole segments of push rod is set with limiting plate and insulating case, insulating case and limiting plate can form the supporting and location to armature on the one hand, and insulating case also can play the insulation protection to middle part bar section on the other hand.
Further, by rotating adjusting nut, the pretightning force of back-moving spring can be adjusted like this, namely can adjust the reverse resistance that armature movement needs to overcome, thus realize the object of the short circuit current of adjustment release.
Further, the peripheral outer wall face on yoke frame is provided with installation gap, assembly adjustment yoke block in installation gap can be selected so as required, and then the object of the magnetic force of adjustment yoke frame, thus realize the object of adjustment release short circuit current.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of embodiment of overcurrent magnetictrip provided by the utility model;
Fig. 2 is the stereogram of the magnetictrip of overcurrent shown in Fig. 1.
Embodiment
As Fig. 1, shown in Fig. 2, a kind of embodiment of overcurrent magnetictrip, release in this embodiment comprises the yoke frame 1 of annular, the centre bore 20 passed for system line extended along the longitudinal direction that this yoke frame 1 has circumferential ring wall and surrounded by circumferential ring wall, and breach 21 on being provided with on the internal face of yoke top of the trellis ring wall, on this, breach 21 extends to the outside wall surface of yoke frame 1 top ring wall from the internal face of yoke frame 1 top ring wall along the vertical direction, this moves back and forth in breach 21 along the vertical direction and is equipped with armature 5, this armature 5 moves up to control dropout separating brake when system line overcurrent and short circuit, specifically, armature 5 is up-small and down-big triangle, described upper breach 21 is the up-small and down-big dihedral breach corresponding with triangle armature, leave between dihedral breach and triangle armature for armature free gap 22 movable in dihedral breach.
On the bottom ring wall of yoke frame 1 with described on breach 21 corresponding position be provided with the installation through hole extended along the vertical direction, installing through hole is the ventricumbent shoulder hole of ladder, installing sleeve 10 is fixedly installed in shoulder hole, the outer peripheral face of installing sleeve 10 is provided with the block step that coordinate spacing with the cascaded surface block of shoulder hole, installing sleeve 10 also has and penetrates upper end in the centre bore 20 of yoke frame 1 along installing through hole, is installed with fixing with yoke frame 1 for installing sleeve 10 clamp nut 9 assembled outside the upper end of installing sleeve 10.
In installing sleeve 10, guiding movement is equipped with push rod 4 along the vertical direction, push rod 4 has the middle part bar section of the centre bore through described yoke frame 1, the limiting plate 6 arranged successively from the top down along the vertical direction and insulating case 7 is set with outside bar section in the middle part of this, described armature 5 is provided with the through hole extended along the vertical direction, described push rod 4 is through described through hole, insulating case 7 lower end is coordinated with the bottom ring wall block of the yoke frame 1 of described annular by installing sleeve 10 and clamp nut 9, and limiting plate 6 upper end and the press-fit of described armature 5 support top, and annular boss is provided with on the upper side of limiting plate, this annular boss and the corresponding annular groove be provided with on armature 5 downside coincide inserting, thus further support limit can be carried out to armature.Further, be installed with dropout jacking block 3 on the top passing described through hole at push rod 4, the downside of dropout jacking block 3 is the pushing tow face coordinated with the upper surface pushing tow of armature 5.The guide frame that guide direction extends along the vertical direction is provided with between dropout jacking block 3 herein and described yoke frame 1, guide frame coordinates with described dropout jacking block spline in push rod circumference, specifically, guide frame comprises two leads 2 be installed on yoke frame, two leads 2 are arranged symmetrically with about push rod 4, dropout jacking block 3 is provided with the pilot hole coordinated with the corresponding guiding movement of two leads 2, and the spline location to dropout jacking block and push rod can also be realized by two leads 2.
The lower end of push rod 4 passes installing sleeve 10 downwards, the back-moving spring 11 extended along the vertical direction is provided with in installing sleeve 10, the upper end of back-moving spring 11 is pushed up on the fixing spring seat that the inner tube wall that is pressed in installing sleeve 10 is provided with, playing lower end then pushes up on the movable spring seat that press-fits and fit over and be slidedly assemblied on push rod, specifically, push rod 4 is set with successively the pointer 13 being used to indicate magnetictrip operating current and the adjusting nut 12 for adjusting back-moving spring thrust below movable spring seat, the outer peripheral face of the bottom barrel of installing sleeve 10 is furnished with the graduation mark 14 distributed along the vertical direction, by rotating adjusting nut 12, pointer 13 and the position of movable spring seat on push rod 4 can be adjusted, and then the pretension active force of back-moving spring can be adjusted, thus short circuit current when reaching armature 5 action of adjustment release.
In addition, for improving the short circuit current scope that release bears further, the peripheral outer wall face of yoke frame 1 is provided with for installing adjustment yoke iron block 5 to adjust the installation gap 24 of yoke frame magnetic force, when needs, yoke frame magnetic force can be adjusted to assembly adjustment yoke iron block 5 in the installation gap 24 of correspondence as required.In the present embodiment, two installation gaps on yoke frame are isosceles trapezoidal structure, and are arranged symmetrically with about push rod.
Yoke frame in the present embodiment, armature and adjustment yoke block form by silicon steel sheet compacting, ensure that yoke frame and adjustment yoke block have high magnetic conductivity, effectively can improve the electromagnetic attraction that armature bears.
When the overcurrent magnetictrip that the present embodiment provides is applied on-board the circuit breaker, the through-flow busbar of circuit breaker is penetrated in the centre bore 20 of yoke frame 1, form electromagnet, when by normal current, the energising of through-flow busbar formed and by yoke frame strengthened magnetic field, the electromagnetic attraction that armature produces be less than to the active force of back-moving spring 11, armature 5 is failure to actuate, normal operation of circuit breaker.And when breaking down in circuit breaker, on through-flow busbar during short circuit current flow, due to silicon steel sheet suppress the yoke frame 1 being there is high magnetic conductivity, now, by through-flow busbar formed and by the strengthened magnetic field of yoke frame, the active force of back-moving spring 11 will be greater than to the electromagnetic attraction that armature 5 produces, armature 5 is driven to move up fast, armature 5 drives push rod 4 to move up by dropout jacking block 3, compression reseting spring 11, and simultaneously, move up with pointer 13, and then can on graduation mark 14 mark place short circuit current, simultaneously, realize the rapid-releasing separating brake of circuit breaker.
In above-described embodiment, limiting plate mainly plays the support to armature, and limiting plate is arranged between armature and system line, and when back-moving spring drives armature to move down reset, limiting plate can also play cushioning effect.
In addition, the release that above-described embodiment provides before the use, according to short circuit current size adjustment adjusting nut and can be selected mounting and adjusting yoke block, realize the adjustability of operating current and short circuit current, expand the easy to use of release.
Back-moving spring in the present embodiment has larger rigidity, can enough provide larger reaction force, improve the operating current of release greatly, make it can be used in large capacity equipment when stroke is shorter.
The release that above-described embodiment provides is when being applied on circuit breaker, when system residing for circuit breaker is short-circuited fault, release can carry out action timely and effectively, automatically thread off within very short time, realize breaker open operation, meanwhile, can also be regulated in advance the operating current of release and short circuit current by adjusting nut and adjustment yoke block, expand the range of application of release.
In above-described embodiment, back-moving spring is also arranged on yoke frame, whole like this yoke frame also plays the effect of frames, in other embodiments, also on yoke frame, the installing rack for lead assembling push rod and back-moving spring can be set up in addition in addition, as long as meet the mutual gearing of armature, push rod and back-moving spring.
In above-described embodiment, when there is short circuit current in system line, armature movement, simultaneously by dropout jacking block and push rod action, thus the systems such as circuit breaker can be driven to carry out dropout separating brake, the drive mechanism of system dropout separating brake can adopt drive mechanism conventional in prior art from release to circuit breaker etc.
In above-described embodiment, upper breach is dihedral breach, and armature is triangle, can improve the responsiveness of armature like this.In other embodiments, armature can be cylindrical or square column, and in other embodiments, upper breach also can be corresponding cylindrical notch.

Claims (10)

1. overcurrent magnetictrip, the armature controlling correspondence system dropout separating brake and the back-moving spring driving armature to move down reset is moved up when being included in system line short circuit current flow, it is characterized in that: the yoke frame also comprising annular, yoke frame have circumferential ring wall and by extending along the longitudinal direction of surrounding of circumferential ring wall for system line through with the centre bore forming electromagnet, the internal face of yoke top of the trellis ring wall is provided with breach, and described armature along the vertical direction guiding movement is assemblied in described upper breach.
2. overcurrent magnetictrip according to claim 1, is characterized in that: described upper breach from the internal face of yoke top of the trellis ring wall run through along the vertical direction extend to yoke top of the trellis ring wall outside wall surface.
3. overcurrent magnetictrip according to claim 2, it is characterized in that: described armature is up-small and down-big triangle, described upper breach is the up-small and down-big dihedral breach corresponding with triangle armature, leaves for armature free gap movable in dihedral breach between dihedral breach and triangle armature.
4. the overcurrent magnetictrip according to Claims 2 or 3, it is characterized in that: on described yoke frame, guiding movement is equipped with push rod along the vertical direction, push rod upper end has the pushing tow face coordinated with the upper end pushing tow of described armature down, described back-moving spring along the vertical direction guiding movement is assemblied on described yoke frame, described yoke frame is provided with the ventricumbent fixing spring seat of block, and press-fit is pushed up in described push rod lower end and described back-moving spring lower end.
5. overcurrent magnetictrip according to claim 4, it is characterized in that: the bottom ring wall of described yoke frame is provided with described upper breach corresponding position the installation through hole extended along the vertical direction, described push rod is installed in described installation through hole, and described fixing spring seat and back-moving spring are all arranged in described installation through hole.
6. overcurrent magnetictrip according to claim 4, it is characterized in that: described armature is provided with the through hole extended along the vertical direction, described push rod is through described through hole, the top passing described through hole at push rod is installed with dropout jacking block, and the downside of dropout jacking block is the pushing tow face coordinated with the upper surface pushing tow of described armature that described push rod upper end has.
7. overcurrent magnetictrip according to claim 6, is characterized in that: be provided with the guide frame that guide direction extends along the vertical direction between described dropout jacking block and described yoke frame, and guide frame coordinates with described dropout jacking block spline in push rod circumference.
8. overcurrent magnetictrip according to claim 5, it is characterized in that: described push rod has the middle part bar section of the centre bore through described yoke frame, the limiting plate arranged successively from the top down along the vertical direction and insulating case is set with outside bar section in the middle part of this, insulating case lower end coordinates with the bottom ring wall block of the yoke frame of described annular, described limiting plate upper end and the press-fit of described armature support top.
9. overcurrent magnetictrip according to claim 4, it is characterized in that: the lower end of described push rod is set with movable spring seat, push rod being set with below movable spring seat the pointer being used to indicate magnetictrip operating current and the adjusting nut for adjusting back-moving spring thrust successively.
10. the overcurrent magnetictrip according to claim 1 or 2 or 3, is characterized in that: the peripheral outer wall face of described yoke frame is provided with for installing adjustment yoke iron block to adjust the installation gap of yoke frame magnetic force.
CN201420642834.8U 2014-10-31 2014-10-31 Overcurrent magnetictrip Expired - Fee Related CN204242978U (en)

Priority Applications (1)

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CN201420642834.8U CN204242978U (en) 2014-10-31 2014-10-31 Overcurrent magnetictrip

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Application Number Priority Date Filing Date Title
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104362051A (en) * 2014-10-31 2015-02-18 平高集团有限公司 Overcurrent electromagnetic release

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104362051A (en) * 2014-10-31 2015-02-18 平高集团有限公司 Overcurrent electromagnetic release

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Legal Events

Date Code Title Description
GR01 Patent grant
C14 Grant of patent or utility model
TR01 Transfer of patent right

Effective date of registration: 20151225

Address after: South East of Pingdingshan city in Henan province 467001 No. 22

Patentee after: Pinggao Group Co., Ltd.

Patentee after: State Grid Corporation of China

Patentee after: Henan high General Electric Co., Ltd.

Address before: South East of Pingdingshan city in Henan province 467001 No. 22

Patentee before: Pinggao Group Co., Ltd.

Patentee before: State Grid Corporation of China

C41 Transfer of patent application or patent right or utility model
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20150401

Termination date: 20201031

CF01 Termination of patent right due to non-payment of annual fee