CN100413009C

CN100413009C - Electric switch device with casing comprising two clamp fixed parts

Info

Publication number: CN100413009C
Application number: CNB021268142A
Authority: CN
Inventors: 劳伦特·普雷维厄克斯
Original assignee: Schneider Electric SE
Priority date: 2001-07-25
Filing date: 2002-07-22
Publication date: 2008-08-20
Anticipated expiration: 2022-07-22
Also published as: EP1280178B1; EP1280178A1; FR2828006A1; DE60239375D1; ES2359132T3; CN1399294A; FR2828006B1

Abstract

An electric switch device, especially a circuit breaker, comprises a housing (12) composed of a socket (14) and a cover (16) fixed with each other by clamps (30a, 30b). The clamps are arranged in grooves (42a, 42b) formed on side panels (24a, 24b) of the housing, and are folded at a front panel (17) of the cover (16) and a rear panel of the socket (14). The cover (16) is provided with an opening (46) for passing a handle (88) of a device mechanism. A detachable contact head of a driving device of the mechanism performs a planar motion in a plane parallel with the side panels of the housing.

Description

Comprise electric switching system with two fixing component type shells of clip

Technical field

The present invention relates to a kind of low tension switchgear, such electric switching system comprises outer rigid housing, and this outer rigid housing is made by the insulation synthetic material, and the driving mechanism of separable contact and these contacts is housed.Especially, the present invention relates to parts are fixed, thereby form the method for the shell of this equipment.

Technical background

The shell of the electric switching system of multipole, high rated power is formed by at least two parts usually, wherein has: a pedestal, this foundation design are used to carry out the supply terminals of the electrical connection of equipment for supporting; And at least one lid.This shell has been determined a housing that is used for the driving mechanism of separable contact and this contact, and this separable contact links to each other with supply terminals.This lid generally includes at least one opening, so that operation, control or the display unit of this equipment are passed through.When needing, this is stamped recess, and the annex of equipment is loaded on this recess place, and this recess is sealed by all or part of a additional cap that covers lid.The equipment of the type is as described in the document WO 01/16984.By hold-down screw lid is fixed on the pedestal, this pedestal is drilled with the hole, and this hole is the extension in the hole of lid, and like this, screw can insert and tighten by the front panel of lid.

The multipole device that had both comprised aforementioned type when the scope of switchgear, when also comprising mono-polar devices, all or part of mechanism of this mechanism, arc control device or tripgear in this multipole device also will be arranged in the mono-polar devices, therefore, the shell identical with the design overall of multipole device also to be arranged in the mono-polar devices, promptly also comprise base and cover.For example, the shell of document WO 01/16986 one pole of describing is exactly this situation.At this moment, this lid comprises four through holes, and what then these four through holes extended is four jiaos of four borings locating that are formed at the interior front panel of enhancing panel of pedestal.Screw can be inserted in these holes, and this screw is fixed on lid on the pedestal.After loading onto screw, this head of screw flushes with the front panel of shell.This problem that is equipped with the size aspect of being undertaken by screw is because have only very little space to utilize on the front panel of equipment.And this structure need provide enough plastic materials to form the enhancing structure in the corner of shell, thereby forms rigid walls in drill hole.When producing high pressure when the heavy current disconnection in equipment, in fact screw works under shear stress, and this needs bigger screw diameter and darker screw thread.Screw must be positioned at the corner of shell, so that vacate the space at middle part, this central space will be installed this mechanism and contact.Therefore, when opening circuit, especially when disconnecting short circuit, the electric arc in device housings produces gas pressure, and middle part, the junction between side panel is promptly away from the middle part of hold-down screw, when being subjected to this gas pressure, easily deformable.This makes must thicken this side panel, so that make them that bigger intensity be arranged, perhaps must manage to make shell to carry out conventional seals.At last, the installation of four screws need be carried out the assembly manipulation of trouble.

Also know other optional method of between two parts of the shell of electric switching system, fixing, especially for the low rated power equipment that mainly is used on the final distribution switchboard.Usually, the shell of this equipment is formed by the two halves housing, and this two halves housing is riveted joint each other usually.In order to reduce the rivet number, in document FR2389221, propose on the junction between the two halves housing, stick to be housed, so that increase the intensity of this shell.Also propose to replace some rivet, as described in document FR2462014 with the toughness clip.In the document, two rivets are used for the rear corner of shell, so that the two halves housing is fixed.These two riveted joints are realized that by two U-shaped toughness clips these two U-shaped toughness clips are arranged on the front panel at front corners place, and perpendicular to the joint line of two halves housing.But, this method can not substitute all rivets.And obviously, they only relate to the equipment of low rated power, and when opening circuit, the equipment of this low rated power only produces relatively low overvoltage, so stress is lower.Also propose to form the toughness clamp in document EP 860901 on half housing, this clamp can be connected with the recess on being formed at second half housing, thereby obtains not have the assembly of rivet and screw.This fixing means is highly beneficial because it is very simple, but it and be not suitable for the equipment that is vulnerable to internal over pressure, especially mains switch, circuit breaker or transducer.And, importantly, the geometry of the shell of housing form and the switch housing fundamental difference that forms by base and cover into two, therefore, the method that is applicable to a kind of type enclosure can not be migrated on the another kind.In document JP 4242037, also propose to fix two parts of case for circuit breaker by elastic webbing around the circuit breaker periphery.Each band is almost completely around this shell.According to a kind of optional mode, the two ends of each band are fixed to one another on the front panel of shell.According to another optional mode, the two ends of band are fixed on covering of shell by appropriate device.This band both can be formed by the polyester textile bar that glass fibre strengthens, and also can be formed by the polyacetal material bar that can carry out very big elongation, was perhaps formed by the compound that comprises nylon and glass or carbon fiber, was perhaps formed by piano wire.In all cases, it is contemplated that, these belts all be toughness with tensile.Such mechanical features makes them can be around this shell, and is provided at required bonding between two parts of shell by the stress that the elastic stretching strain by this band is produced.The installation of this band also is not easy, because it needs bigger pulling force, thereby needs special machine or instrument to install.In addition, when the termination of band is fixed on the shell, be tangential substantially at the formed stress of the fixed point of shell, this is also not really favourable.At last, this band is subjected to bigger stretching, and this will make their elastic characteristic change in time, and therefore, after in a few years, the intensity of this shell will be a problem.

Summary of the invention

Therefore, the objective of the invention is to overcome the shortcoming of prior art, thereby a kind of electric switching system with the molding outer casing that comprises base and cover is provided, and in this electric switchgear, fixing means between base and cover does not bother, and can simplify installation and more cheap.

For this reason, the purpose of this invention is to provide a kind of electric switchgear, this electric switchgear comprises:

One shell, this shell comprises:

One pedestal, this pedestal forms rear board;

One lid, this lid forms the front panel relative with this rear board, and the opening that passes this lid is arranged;

Separable electrical contact, this electrical contact is loaded on enclosure, and in front between plate and the rear board;

The driving mechanism of separable contact, this driving mechanism is loaded on enclosure, and between this front panel and rear board, and being equipped with operating means, the passage that this operating means passes in the lid stretches to this housing exterior;

Fixture, this fixture makes lid fix with respect to pedestal, and comprise that at least one first ductile metal presss from both sides, this first ductile metal folder comprises a mid portion, this mid portion plate from behind extends to front panel always, what then this mid portion extended is the preceding lug and the back lug that folds on the rear board that folds on the front panel, thereby clamps this base and cover.

Therefore this clip does not take any space in the shell in housing exterior.The installation of this clip is very simple.In fact, a lug is located with respect to shell, and then apply very light pressure to the middle part of this clip, the bending of this clip owing to strain, thus can make the second lug installation in position.This installation does not need very big power.In addition, mounted clip can't be subjected to very big strain, and therefore, in the useful life of this equipment, its elastic characteristic can not change.

Preferably, this fixture also comprises: second ductile metal folder, this second ductile metal folder comprises a mid portion, this mid portion plate from behind extends to front panel, what then this mid portion extended is the preceding lug and the back lug that folds on the rear board that folds on the front panel, thereby clamps this base and cover.This shell is formed with first side panel respect to one another and second side panel, and the mid portion of first clamp contacts with first side panel, and the mid portion of second clamp contacts with second side panel.This shell is positioned at the geometric envelope face of parallelepiped, and this enveloping surface has and first side panel and the tangent plane geometry side of second side panel, and this separable contact of drive mechanism carries out plane motion along the track that is parallel to described how much sides.

These clips are clamped the two opposite sides panel of shell.Therefore, they constitute external reinforcement or the perimeter frame that strengthens this shell.The panel of shell only is under pressure at the interface place with clip and can not be subjected to bigger shear stress.When this shell disconnects high electric current and during the high internal over pressure power that is subjected to being produced by electric arc in the enclosure, the stress at the interface place of shell and clip can't make this shell damage.

And the reduced size of clip makes them can be arranged to other position outside the turning when needed, especially in the position near the side panel middle part.Therefore, will improve the intensity of this shell, especially the junction between the side panel of the side panel of pedestal and lid.

Preferably, first side panel comprises a groove, is used for adorning the mid portion of first clamp, and second side panel comprises a groove, is used for adorning the mid portion of second clamp.These grooves make this clip to fix under the situation that does not need a large amount of plastic materials.These grooves have limited approaching to this clip, thereby prevent that accident from taking apart.

Preferably, this shell also is formed with the transverse panel that side panel is linked up, and this equipment also comprises the supply terminals that links to each other with contact, and this equipment outwards is opened on the outside of shell by being formed at the access portal on this transverse panel.Clip is arranged in without any on the side panel that is electrically connected function, therefore can not produce any additional overslaugh to the transverse panel that is used to connect.

According to an embodiment, side panel has the surface bigger than transverse panel, especially when this equipment is mono-polar devices.At this moment, in fact just in this case, the reduced size of clip has biggest advantage in practice, when promptly being used in multipole device too.

Preferably, rear board comprises: the first back recess, with the back lug of civilian dress first clamp; And recess after second, with the back lug of civilian dress second clamp.Equally, front panel comprises: recess before first, with the preceding lug of civilian dress first clamp; And recess before second, with the preceding lug of civilian dress second clamp.These recesses help to prevent that accident from taking apart.

According to an embodiment, this equipment also comprises a bonnet, and this bonnet to small part covers the back lug of first clamp and the back lug of second clamp.The basic function of this bonnet is the back lug that prevents near clip.

According to an embodiment, this equipment also comprises a front shroud, and this front shroud has the opening that operating means is passed through.This front shroud is also referred to as accessory cover, and the function of pilot operationp device is arranged.It also can cover the recess that covers the opening on the opposite side of pedestal, with civilian dress display unit or control annex.But, it does not have the function of the internal pressure of fixed mechanism or containing equipment.

According to an optional embodiment, this front shroud to small part covers the preceding lug of first clamp and the preceding lug of second clamp.At this moment, this front shroud also has the function that prevents direct approaching this preceding lug.

Description of drawings

By following explanation to specific embodiments of the present invention, can more understand other advantage and feature, this specific embodiments is as just non-limiting examples, and expression in the accompanying drawings, in the accompanying drawing:

Figure 1 shows that perspective view according to the single-pole circuit breaker of the embodiment of the invention;

Figure 2 shows that circuit breaker among Fig. 1 is along the sectional side elevation of section II-II; And

Figure 3 shows that circuit breaker among Fig. 1 is along the cross-sectional figure of section III-III.

Embodiment

Switchgear shown in the figure is a kind of circuit-breaker 10 of low pressure one pole, and this circuit-breaker 10 has a molding outer casing 12 of being made by synthetic insulating material, and this shell 12 is formed by pedestal 14 and the fore lid 16 at the rear portion.Lid 16 comprises: front panel 17, and this front surface 17 is covered by auxiliary cover plate 18 parts; Zigzag side panel 19a, 19b; And transverse panel 20,21.The part of the pedestal 14 of these parts comprises rear board 22, side panel 23a, 23b and the

transverse panel

24,25 relative with lid 16 front panel 17.Lid 16 is contained on the pedestal 14, how much faying faces wherein are positioned at the height place at the edge of the side panel of base and cover and transverse panel, like this, shell after the assembling is similar to parallelepiped, and two relative narrow and cut a lot of

lateral surfaces

26,28 with two of side surface 24a, 24b with large-size are arranged.In other words, this device housings can be positioned at the geometric envelope face that is made of rectangular hexahedron, and the big surface of this rectangular hexahedron is tangent with side panel 24a, 24b, and is parallel to the section II-II of Fig. 2.

The lid 16

clip

30a, 30b by four flexibles be fixed on the pedestal 14, these four clips on side surface 24a, the 24b of shell in couples toward each other.Each clip is formed by the hard sheet of flexible, this hard sheet has straight mid portion 32a, 32b, this mid portion is lug 34a, 34b before the one end is extended with, should before lug 34a, 34b become to insert the form of covering the clamp among 16 preceding recess 36a, the 36b, this mid portion is extended with back lug 38a, 38b at its other end, and this back lug 38a, 38b insert in back recess 40a, the 40b that is formed in the pedestal 14.Do not work, back lug 38a, 38b is folded into this mid portion 32a, 32b angulation less times greater than 90 °.Preceding recess 36a, 36b be outside opening on front surface 17, and stretches into along the direction that is roughly parallel to side panel 24a, 24b, so that accept to be folded into the clamp of 180o.Back recess 40a, 40b are approximately perpendicular to side panel 24a, 24b and stretch into, and it is outside opening on this side panel, and this recurve interruption-forming is along the recess of the direction of corresponding preceding recess.Be connected by the groove 42a on the side panel that is formed at base and cover especially 42b with back recess 40a especially 40b with the corresponding preceding recess 36a of same clip 30a especially 30b especially 36b.Back plate 43 is clipped on (or being bonded at) rear board 22, thereby forms back shroud, to prevent to enter the back recess.This shell also is formed with the semi-cylindrical groove 44 that is parallel to groove 42a, 42b, and this semi-cylindrical groove 44 is positioned at the Si Jiaochu of this equipment.Each semi-cylindrical groove 44 has a recess 45 corresponding with it.

Lid 16 has opening 46, so that the operating grip 88 of breaker mechanism is passed through, what then this opening extended is the respective openings 47 of auxiliary cover plate 18.Portable shielding spare 48 guarantees the inside and outside in this opening 46 places sealing of shell 12.Auxiliary cover plate 18 is equipped with a button 49 in addition, is used for trip command is passed to this mechanism.Auxiliary cover plate 18 is by being fixed on this lid 16 from covering the screw 50 that inside enters.

Shell 12 is equipped with catch-holder assembly 54, driving mechanism 56 and magnetic-thermal tripping device 58, as shown in Figure 2.

Catch-holder assembly 54 forms by the stationary contacts 62 that is electrically connected with the first power supply wiring bar 64 with by rotary contact carriage 68 supporting and the movable contact 66 that is electrically connected with second source terminal strip 70.This power

supply wiring bar

64,70 comes out from this shell by the opening in the transverse panel 24,26.

Contact

62,66 is determined in the arc control device 72 that apparatus for separating metals 73 is arranged.One is molded together and has the central dividing plate 74 that makes the slit that movable contact 66 passes through and is fixed on that this is indoor and in that side at contact carriage 68 places with pedestal 14.At the opposite side of this central dividing plate 74, this chamber 72 is by added partition 76 sealings, and this added partition 76 has the opening as the cut-off gases outlet.The another side of this chamber is formed by the panel of the base and cover of shell.

Mechanism 56 drives contact carriage 68 and moves between open position and make position.It comprises the toggle mechanism that is made of lower pole 80 and upper bar 82, this lower pole 80 is hinged on the contact carriage, this upper bar 82 is hinged on the lock bolt rod 84 that is driven by rotatable metal support 86, and this rotatable metal support 86 is fixedly mounted on the operating means that is formed by handle 88.This lock bolt rod 84 is with disconnection locking bolt 90 operations by tripgear 58 operations.Not shown energy-stored spring extends between the hinged axle of handle bracket 86 and toggle.The operation of this mechanism can be understood more accurately by document FR2783349, obtain further detailed content, should be with reference to the document.Movable contact 66 is driven by this mechanism along the direction of the section II-II that is parallel to Fig. 2.

The assembling of this equipment is carried out in the following manner.At first, catch-holder assembly 54, mechanism 56 and tripgear 58 are installed in the pedestal 14.Simultaneously, accessory septa 18 is fixed on by screw 50 and covers on 16.To cover 16 then is installed on the pedestal 14.Then, for each

clip

30a, 30b, clamp 34a, 34b are inserted among corresponding preceding recess 36a, the 36b, and before applying light pressure on mid portion 32a, the 32b of this clip, make

clip

30a, 30b pivoted, be pressed against on the pedestal 12 so that will cover 16.Then, this clip passes through strain and slight curvature, and back lug 38a, 38b self insert among back recess 40a, the 40b, and remain in the recess, and mid portion 32a, the 32b with this clip is pressed on the bottom of groove 42a, 42b simultaneously.This groove 42a, 42b have enough degree of depth to make

clip

30a, 30b keep below side panel 24a, the 24b of shell after in a single day loading onto clip.Like this, this

clip

30a, 30b can keep always, therefore do not have the danger that this clip is deviate from accidentally owing to the impact of shell 12.At last, prevent to enter back recess 40a, 40b by mounting panel 43.

After clip installed, this equipment just can be contained on the Electric switch plate.When adopting dismountable lug 100, will provide horizontal retention tab 102, this retention tab 102 is inserted in the slit 45 of lid, and also provides the screw (not shown), and this screw inserts in lug 100, and is screwed in the panel of switchboard.This screw is guided by semi-cylindrical groove 44, and is held in place by lug 100.

In order to take off clip, this equipment at first unloads from switchboard, thereby can then back plate 43 be taken off near the rear board 22 of shell 12, and for each

clip

30a, 30b, by instrument back lug 38a, 38b is extracted out from back recess 40a, 40b.

Multiple version is certainly arranged.

The clip of arbitrary number can be arranged, as long as a side of at least one clip closure is arranged.In fact also can expect sealing opposite side by screw or by hinge.

When in each side at least one clip being arranged all, this clip must be in couples not toward each other.And the number of this clip must not be an even number yet.

It will also be appreciated that additional clip is arranged on the athwartship plane of shell.This is particularly useful when shell is very wide, for example, and when being multipole device.

This clip and recess can have any shape, as long as can clamp these two parts of shell.

According to a unshowned optional embodiment, can consider to make the back recess to become mirror with the preceding recess of illustrated embodiment, that is to say along the direction that is parallel to side panel and stretch into deeply.At this moment, can expect making the back lug to become the form of clamp, this need assemble by the termination plastic deformation that makes clip with instrument.

It will also be appreciated that the back recess that provides identical shaped, and clamp is replaced by the preceding lug that is folded into about 90 ° or 100 °, resemble the back lug with the back recess of illustrated embodiment.

According to an embodiment, can between lid and auxiliary cover plate, be furnished with the housing of the annex that is used for this equipment.Can be like this during especially for multipole device.In multipole device, by in the shared space of the mechanism at central electrode place corresponding to free space at the side electrodes place.

According to another embodiment, the accessory cover plate is extended into cover preceding lug.

According to another embodiment, can omit auxiliary cover plate.

And, lid can be simplified and become a plate that forms front panel, the whole side panel by pedestal of the side panel of shell forms.Shell is made of three parts, has: pedestal, this pedestal are reduced to the back plate; Intermediate casing, this intermediate casing does not have rear board and lid, has formed side panel and transverse panel; And lid, this lid is reduced to front panel.

Handle can be replaced by button or other executive component that makes operating personnel can directly control this mechanism.

This mechanism can be any type that can make movable contact carry out plane motion, no matter this motion is rotation, translation or their combination.Can also be that this mechanism drives this two contacts simultaneously along relative direction.

Claims

1. electric switching system comprises:

One shell (12), this shell comprises:

One pedestal (14), this pedestal forms rear board (22),

One lid (16), this lid forms the front panel (17) relative with this rear board (22), and the opening (46) that penetrates this lid is arranged;

Fixture (30a, 30b), this fixture make lid (16) fixing with respect to pedestal (14);

Separable electrical contact (62,66) is loaded on shell (12) inside, and in front between plate (17) and the rear board (22);

The driving mechanism of separable contact (56), this driving mechanism are loaded on shell (12) inside, and in front between plate (17) and the rear board (22), and be equipped with operating means (88), the passage (46) that this operating means passes in the lid stretches to this shell (12) outside,

It is characterized in that: this fixture (30a, 30b) comprises at least:

One first ductile metal folder (30a), this first ductile metal folder comprises a mid portion (32a), this mid portion plate (22) from behind extends to front panel (17) always, then this mid portion extends is to fold into the preceding lug (34a) on the front panel and fold into back lug (22) on the rear board, thereby clamps this base and cover.

2. electric switching system according to claim 1, it is characterized in that: this fixture also comprises: second ductile metal folder (30b), this second ductile metal folder comprises a mid portion (32b), this mid portion plate (22) from behind extends to front panel (17), then this mid portion extends is to fold into the preceding lug (34b) on the front panel and fold into back lug (38b) on the rear board (22), thereby clamps this base and cover.

3. electric switching system according to claim 2, it is characterized in that: this shell is formed with first side panel respect to one another (30a) and second side panel (30b), the mid portion of first clamp (32a) contacts with first side panel (24a), and the mid portion of second clamp (32b) contacts with second side panel (24b).

4. electric switching system according to claim 3, it is characterized in that: this shell (12) is positioned at the geometric envelope face of parallelepiped, this enveloping surface has and first side panel and the tangent plane geometry side of second side panel, and driving mechanism (56) drives this separable contact and carries out plane motion along the track that is parallel to described how much sides.

5. electric switching system according to claim 3, it is characterized in that: first side panel (30a) comprises a groove (42a), be used for adorning the mid portion (32a) of first clamp, second side panel (30b) comprises a groove (42b), is used for adorning the mid portion (32b) of second clamp.

6. electric switching system according to claim 3, it is characterized in that: this shell (12) also forms the transverse panel (26,28) that links side panel (24a, 24b), this equipment also comprises the supply terminals (64,70) that links to each other with contact (62,66), and this equipment outwards is opened on the outside of shell (12) by being formed at the access portal on this transverse panel (26,28).

7. electric switching system according to claim 6 is characterized in that: this side panel (24a, 24b) has than the bigger surface of transverse panel (26,28).

8. electric switching system according to claim 7 is characterized in that: this equipment is mono-polar devices.

9. according to each described electric switching system in the claim 2 to 8, it is characterized in that: this rear board (22) comprising: the first back recess (40a) is used for adorning the back lug (38a) of first clamp; And the second back recess (40b), be used for adorning the back lug (38b) of second clamp.

10. according to each described electric switching system in the claim 2 to 8, it is characterized in that: this front panel (17) comprising: recess (36a) before first is used for adorning the preceding lug (34a) of first clamp; And recess (36b) before second, be used for adorning the preceding lug (34b) of second clamp.

11. according to each described electric switching system in the claim 2 to 8, it is characterized in that: this equipment also comprises a back shroud (43), this back shroud to small part covers the back lug (38a) of first clamp and the back lug (38b) of second clamp.

12. according to each described electric switching system in the claim 2 to 8, it is characterized in that: this equipment also comprises a front shroud (18), this front shroud is useful on the opening (47) that operating means (88) passes through.

13. electric switching system according to claim 12 is characterized in that: this front shroud (18) to small part covers the preceding lug (34a) of first clamp and the preceding lug (34b) of second clamp.