CN208903884U - The exhaust gear and motor starter of device for switching - Google Patents

Abstract

A kind of exhaust gear of device for switching, contact mechanism including shell and setting in the housing, shell is corresponding to be equipped with exhaust gear in one end of contact mechanism, exhaust gear includes exhaust passage, air discharge duct is equipped on the side wall of contact mechanism side in exhaust passage, gas vent is equipped on side wall of the exhaust passage far from contact mechanism side, gas vent is shifted to install with air discharge duct, pass through the gas vent and air discharge duct shifted to install, the effective length of exhaust passage can not only effectively be elongated, to extend the retention time of enclosure interior air pressure, enclosure interior and outside is set to be able to maintain more long draught head, more longlasting air pressure arc extinguishing is formed to improve striking ability, and longer exhaust passage can also effectively reduce electric arc and fly out the distance of shell, client is when in use, especially also it is more convenient in external cabling.The motor starter that the utility model is created can effectively improve breaking capacity by the way that the exhaust gear of device for switching is arranged.

Description

The exhaust gear and motor starter of device for switching

Technical field

The invention is related to Low Voltage Electrical Apparatus, a kind of exhaust gear more particularly to device for switching and has the row The motor starter of mechanism of qi structure.

Background technique

Device for switching is the important device for controlling electric circuit conducting and disconnecting, and is typically provided with contact mechanism, The dynamic touching bridge and static contact of contact mechanism are respectively connected to electric circuit, pass through being contacting and separating to be connected for dynamic touching bridge and static contact With disconnect electric circuit, such as contactor and relay.In addition, some device for switching are additionally provided with the tripping for protecting electric circuit Mechanism, tripping mechanism can be such that touching bridge separates with static contact when electric circuit breaks down to disconnect electric circuit realization Protection, such as motor starter and breaker.If the electric arc pulled out when dynamic touching bridge and static contact separate can not draw in time Out and extinguish, being not only easy to burn contact mechanism causes device for switching to fail, but also is easy to cause dynamic touching bridge and static contact bonding Together, make device for switching that can not disconnect electric circuit, especially when there are the failures such as short circuit, the electric arc not only pulled out is more Greatly, higher to the breaking capacity requirement of contact mechanism, and at this time if dynamic touching bridge and static contact bond together, it can be to property Very big hidden danger is caused with personal safety.

Typically directly Bending Processing forms existing dynamic touching bridge, and increases arc leading angle in end, but striking angular breadth becomes Change small, electric arc is not easy to concentrate in arc process, and the off speed for often leading to electric arc is slow, is unfavorable for extinguishing electric arc.In addition, When short circuit current by when can air inside heater switch electric appliance, and the electric arc pulled out also can be inside heater switch electric appliance Air, therefore exhaust gear is usually arranged in existing device for switching on shell, but existing exhaust gear is not only vented and leads to Road is too short, and exhaust velocity is too fast, although shell can be discharged heat in time, draught head can reduce and disappear moment It loses, the draught head between gas chamber is unobvious, causes device for switching that can not play the guiding function to electric arc by exhaust airstream, together The off speed that sample also results in electric arc is slow.

Utility model content

The defect for aiming to overcome that the prior art of the invention, provides that a kind of structure is simple, high reliablity opens The exhaust gear of powered-down device.

To achieve the above object, the invention adopts the technical scheme that

A kind of exhaust gear of device for switching, the contact mechanism including shell 1 and setting within the case 1, shell 1 are corresponding It is equipped with exhaust gear 5 in one end of contact mechanism, exhaust gear 5 includes exhaust passage 51, in exhaust passage 51 close to contact machine The side wall of structure side is equipped with air discharge duct 52, and gas vent 53 is equipped on side wall of the exhaust passage 51 far from contact mechanism side, Gas vent 53 is shifted to install with air discharge duct 52.

Optionally, arc-chutes 2 are equipped between the exhaust gear 5 and contact mechanism, arc-chutes 2 are towards exhaust gear 5 side is equipped with arc extinguishing air discharge duct 23, and arc extinguishing air discharge duct 23 is shifted to install with air discharge duct 52.

Optionally, the contact mechanism includes the dynamic touching bridge and static contact being oppositely arranged, and moving touching bridge includes contact plate 43, Contact plate 43 is equipped with the movable contact 44 cooperated with static contact, is respectively equipped with arc leading angle 45, arc leading angle at the both ends of contact plate 43 45 shift to install with air discharge duct 52.

Optionally, the shell 1 includes two side plates 11 being oppositely arranged and is connected to the two of two side plates 11 End plate 12 between end, exhaust gear 5 include with the spaced partition 54 of end plate 12, formed between partition 54 and end plate 12 The exhaust passage 51 vertical with side plate 11, one end of partition 54 and the side plate 11 of side connect, the side plate of the other end and the other side To form air discharge duct 52, end plate 12 is equipped with gas vent 53 on one end far from air discharge duct 52 for 11 interval settings.

Optionally, arc-chutes 2 are equipped between the exhaust gear 5 and contact mechanism, arc-chutes 2 include and 54 phase of partition To the fixed plate 21 of setting, and the multiple arc extinguishing grid pieces 22 being arranged in fixed plate 21, arc extinguishing, which is equipped with, in fixed plate 21 arranges Air drain 23, the distance H2 of the side plate 11 of arc extinguishing air discharge duct 23 to shell 1 are greater than or equal to the width H1 of the air discharge duct 52.

Optionally, the fixed plate 21 is at U-shaped comprising is oppositely arranged on the arc extinguishing side plate of 22 two sides of arc extinguishing grid pieces 25, and it is connected to the arc extinguishing partition 27 of 25 one end of arc extinguishing side plate, the inside of two arc extinguishing side plates 25 is arranged in arc extinguishing grid pieces 22, The end of arc extinguishing partition 27 and arc extinguishing grid pieces 22 cooperates, and arc extinguishing air discharge duct 23 is equipped on arc extinguishing partition 27, in arc extinguishing grid pieces 22 The side of two sides is respectively equipped with the retaining convex rib 26 connecting with arc extinguishing side plate 25.

Optionally, the arc leading angle 45 to far from movable contact 44 other side bending, the side of 45 two sides of arc leading angle with connect It is equipped with striking notch 42 between the end of touch panel 43, the width a of arc leading angle 45 is made to be less than the width b of contact plate 43.

The invention additionally provides a kind of motor starter comprising the exhaust of device for switching described at least two Mechanism, contact mechanism includes the dynamic touching bridge being arranged between two exhaust gears 5 and the both ends of bridge side are opposite sets with dynamic touching The static contact set.

Optionally, arc-chutes 2 are equipped between the both ends and exhaust gear 5 of the dynamic touching bridge, arc-chutes 2 include multiple intervals Arc extinguishing grid pieces 22, arc extinguishing opening 24 is equipped on arc extinguishing grid pieces 22, is equipped with run-on tab 3 in the lower section of dynamic touching bridge, run-on tab 3 Middle part is correspondingly arranged at the lower section of dynamic touching bridge, and the both ends of run-on tab 3 reach the lower section of arc-chutes 2 respectively.

The exhaust gear of the device for switching of the invention, by the gas vent 53 and air discharge duct 52 shifted to install, not only The effective length of exhaust passage 51 can be effectively elongated, to extend the retention time of 1 air pressure inside of shell, made inside shell 1 It is able to maintain more long draught head with outside, forms more longlasting air pressure arc extinguishing to improve striking ability, and longer exhaust Channel 51 can also effectively reduce electric arc and fly out the distance of shell 1, and client is when in use, especially also more square in external cabling Just.In addition, can be avoided air discharge duct 52 and arc extinguishing by shifting to install the arc extinguishing air discharge duct 23 of arc-chutes 2 with air discharge duct 52 Air discharge duct 23, which is oppositely arranged, makes electric arc directly fly out outside shell 1, can further increase the striking effect of exhaust gear 5.In addition, By shifting to install air discharge duct 52 and arc leading angle 45, electric arc can be further reduced and flown out the distance of shell 1.In addition, this hair Bright creation additionally provides a kind of motor starter of strong breaking capacity.

The motor starter of the invention can effectively improve electronic by the setting of device for switching exhaust gear The breaking capacity of machine starter, the especially breaking capacity in short circuit.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of the invention motor starter；

Fig. 2 is the top view of the invention motor starter；

Fig. 3 is the sectional view of the invention motor starter；

Fig. 4 is the side view of the dynamic touching bridge of the invention；

Fig. 5 is the top view of the dynamic touching bridge of the invention；

Fig. 6 is a kind of embodiment of the invention exhaust gear；

Fig. 7 is the cooperation schematic diagram of the invention arc-chutes and exhaust gear；

Fig. 8 is another three kinds of embodiments of the invention exhaust gear.

Specific embodiment

Below in conjunction with the embodiment that attached drawing 1 to 8 provides, the specific implementation of the device for switching of the invention is further illustrated Mode.The device for switching of the invention is not limited to the following description.

As shown in Figs 1-4, the device for switching of the invention includes shell 1 and the contact mechanism that is arranged in shell 1, Contact mechanism includes dynamic touching bridge and two static contact (not shown)s for being oppositely arranged on dynamic touching bridge two sides, and two are oppositely arranged Static contact be respectively connected to electric circuit, move touching bridge it is mobile close to static contact when, both ends can be contacted with two static contacts respectively Accessed electric circuit is connected, when moving touching bridge far from static contact movement, both ends can leave two static contacts to disconnect The electric circuit of access.The device for switching of the present embodiment is motor starter.

The dynamic touching bridge includes contact plate 43, and the movable contact cooperated with static contact is equipped on the both ends of 43 side of contact plate 44, it is respectively equipped on the end face at 43 both ends of contact plate to the arc leading angle 45 far from 44 side bending of movable contact, 45 two sides of arc leading angle Side and contact plate 43 end between be equipped with striking notch 42, make arc leading angle 45 width a be less than contact plate 43 width B when pulling out electric arc between movable contact 44 and static contact, makes the width of arc leading angle 45 be less than contact plate 43 by striking notch 42 Width, can play the role of concentrating electric arc, accelerate movement velocity of the electric arc on arc leading angle 45, to improve arc leading angle 45 Striking ability.

Further, the width of the arc leading angle 45 is gradually reduced along the direction far from movable contact 44, in arc leading angle 45 Contraction front 47a is respectively equipped on the side of two sides, contraction front 47a is close to each other along the direction far from movable contact 44, contraction front 47a energy The width of enough further reduction arc leading angles 45 and the striking effect for improving arc leading angle 45.The contraction front 47a is preferably plane, and And the angle d between two contraction front 47a is preferably 20-30 degree, certainly, contraction front 47a is also possible to cambered surface, belongs to this hair The protection scope of bright creation.

Further, the arc leading angle 45 is equipped with the striking convex ribs 41 being arranged along striking direction, passes through striking convex ribs 41 Striking channel is formed, the speed and effect of striking can be further increased, of course, it is possible to a striking convex ribs 41 are set, it can also A plurality of striking convex ribs 41 are arranged, the number and shape of striking convex ribs 41 are not specifically limited here, alternatively, can not also set Striking convex ribs 41 are set, the protection scope of the invention is belonged to.

Refering to a kind of specific embodiment for moving touching bridge show Fig. 3-5, moving touching bridge includes contact plate 43, in contact plate 43 Middle part is equipped with spring portion 61, and spring portion 61 passes through the carrier base of reset spring 6 and 1 cavity bottom of shell far from the side of static contact 13 connections, are equipped with the spring boss 62 cooperated with reset spring 6 in spring portion 61, and reset spring 6 can be covered in spring boss It is fixed on 62 with dynamic touching bridge, both ends of the contact plate 43 on the side towards static contact are respectively equipped with movable contact 44, in movable contact It is respectively equipped with positive stop lug boss 49 between 44 and the two sides of spring portion 61, is respectively equipped with arc leading angle on the end face at 43 both ends of contact plate 45, it is equipped with striking notch 42 between the side of 45 two sides of arc leading angle and the end of contact plate 43, keeps the width a of arc leading angle 45 small In the width b of contact plate 43.

Further, the arc leading angle 45 is to the other side bending far from movable contact 44, on 45 two sides side of arc leading angle point Not She You joint face 47b and contraction front 47a, two joint face 47b of two sides it is arranged in parallel and with contact plate 43 End vertical setting, two joint face 47b connect with the end face of contact plate 43 close to one end of contact plate 43 and are respectively formed folder Angle is the striking notch 42 at right angle, and two one end of joint face 47b far from contact plate 43 are connect with two contraction front 47a respectively, Two contraction front 47a are close to each other along the direction far from movable contact 44, and the angle d between contraction front 47a is preferably 20-30 degree.

Further, one end two contraction front 47a close to each other is connected by arc ignition face 46, arc ignition face 46 at Cambered surface, certainly, arc ignition face 46 can also at an acute angle or other shapes, belong to the protection scope of the invention.

Further, the arc leading angle 45 is equipped with positioned at the same side of movable contact 44 and draws in the side towards static contact The middle part of arc leading angle 45 is arranged in arc convex ribs 41, striking convex ribs 41, and one end is connect with stationary contact 44, the other side and arc ignition face 45 connections form striking channel by striking convex ribs 41, can further increase the speed and effect of striking, naturally it is also possible to set Two or more striking convex ribs 41 are set, the protection scope of the invention is belonged to.

As shown in Fig. 1-2,6, the corresponding both ends in dynamic touching bridge of shell 1 are respectively equipped with two exhaust gears being oppositely arranged 5, Exhaust gear 5 includes the exhaust passage 51 that dynamic touching bridge one end is arranged in, in exhaust passage 51 on the side wall of dynamic touching bridge side Equipped with air discharge duct 52, gas vent 53, gas vent 53 and air discharge duct are equipped on side wall of the exhaust passage 51 far from dynamic touching bridge side 52 shift to install, and when 1 air pressure inside of shell increases, by the gas vent 53 and air discharge duct 52 shifted to install, can draw significantly The effective length of long exhaust passage 51 enables 1 inside of shell and outside to extend the retention time of 1 air pressure inside of shell More long draught head is kept, air pressure is run outward along exhaust passage also can pull electric arc to run simultaneously, and draught head improves arc motion Speed is to improve striking ability, and longer exhaust passage 51 can also effectively reduce electric arc and fly out the distance of shell 1, client When in use, it is especially also more convenient in external cabling.

Further, the air discharge duct 52 is shifted to install with arc leading angle 45, by dislocation be arranged air discharge duct 52 and draw Arc angle 45 is able to extend the distance that electric arc flies in shell 1, is further reduced electric arc and flies out the distance of shell 1.

If Fig. 6 shows a kind of embodiment of exhaust gear 5, the shell 1 is corresponding to be all provided with that there are two opposite in each phase The side plate 11 of setting and the end plate 12 being connected between the both ends of two side plates 11, exhaust gear 5 include that setting is being held Partition 54 between plate 12 and the fixed plate 21 of arc-chutes 2 forms the row vertical with side plate 11 between partition 54 and end plate 12 The one end in gas channel 51, partition 54 is connect with the side plate 11 of 1 side of shell, and the side plate 11 of the other end and 1 other side of shell is spaced Setting is to form air discharge duct 52, and end plate 12 is equipped with gas vent 53 on one end far from air discharge duct 52, and present embodiment makes to be vented Slot 52 and gas vent 53 are separately positioned on the head of exhaust passage 51, tail both ends, improve effective length of exhaust passage 51 as much as possible Degree maximizes the delay effect of draught head in shell 1.

Further, as shown in Fig. 3,7, arc-chutes 2 is respectively equipped between the both ends and exhaust gear 5 of dynamic touching bridge, are gone out Arc chamber 2 is equipped with arc extinguishing air discharge duct 23 in the side towards exhaust gear 5, and arc extinguishing air discharge duct 23 is shifted to install with air discharge duct 52, energy Enough avoiding air discharge duct 52 and arc extinguishing air discharge duct 23 from being oppositely arranged makes electric arc directly fly out outside shell 1, can further increase exhaust The striking effect of mechanism 5.Specifically, arc-chutes 2 are oppositely arranged on the both ends of dynamic touching bridge, each arc-chutes 2 include and exhaust The arc extinguishing grid pieces 22 that the fixed plate 21 and multiple intervals that mechanism 5 is oppositely arranged are fixed in fixed plate 21,22 energy of arc extinguishing grid pieces Enough breaking arcs accelerate the extinguishing of electric arc, and electric arc can be introduced into arc-chutes 2 by the arc leading angle 45, to further increase The breaking capacity of device for switching, is equipped with arc extinguishing air discharge duct 23 in fixed plate 21, and arc extinguishing air discharge duct 23 arrives 1 epipleural 11 of shell Distance H2 be greater than or equal to the air discharge duct 52 width H1, avoiding air discharge duct 52 from being oppositely arranged with arc extinguishing air discharge duct 23 makes Electric arc directly flies out outside shell 1, to improve the striking effect of exhaust gear 5.Certainly, the occasion smaller in operating current, or Person can also be not provided with arc-chutes 2 when device for switching accesses the pole N.

If Fig. 8 shows other three kinds of embodiments of exhaust gear 5, the air discharge duct 52 also be can be set in partition 54 Middle part, end plate 12 one or both sides setting with air discharge duct 52 misplace gas vent 53, although exhaust passage 51 it is effective away from Defection is reduced relative to former embodiment, but can also play the effect for keeping air pressure delay in shell 1, is all belonged to In the protection scope of the invention.A kind of specific embodiment of arc-chutes 2 is shown refering to Fig. 2,7, the arc-chutes 2 include The arc extinguishing grid pieces 22 at multiple intervals, arc extinguishing grid pieces 22 include the arc extinguishing portion 22a with dynamic touching bridge cooperation, and are arranged far from dynamic touching The fixed part 22b that bridge side is connect with fixed plate 21 is equipped with the arc extinguishing cooperated with the arc leading angle 45 of dynamic touching bridge on arc extinguishing portion 22a Opening 24, arc leading angle 45 reach the fit inside of arc extinguishing opening 24.

Further, the bottom of the shell 1 is equipped with run-on tab 3, and the middle part of run-on tab 3 is correspondingly arranged under dynamic touching bridge Side, the both ends of run-on tab 3 reach the lower section of arc-chutes 2 respectively, the speed and effect of striking can be further increased by run-on tab 3 Fruit improves the breaking capacity of device for switching.

Further, the fixed plate 21 is at U-shaped comprising is oppositely arranged on the fixed part 22b two of arc extinguishing grid pieces 22 The arc extinguishing side plate 25 of side, and it is connected to the arc extinguishing partition 27 of 25 one end of arc extinguishing side plate, fixed part 22b is arranged two arc extinguishing sides The end of the inside of plate 25, arc extinguishing partition 27 and fixed part 22b cooperate, and arc extinguishing air discharge duct 23 is equipped on arc extinguishing partition 27, The side of the two sides fixed part 22b is respectively equipped with the retaining convex rib 26 connecting with arc extinguishing side plate 25.

The invention additionally provides a kind of motor starter, including multiple dynamic touching bridges being set side by side, each dynamic touching The side of bridge is equipped with two static contacts corresponding with dynamic touching bridge both ends, two static contacts difference at each dynamic touching bridge both ends It is corresponding with one, it further include arc-chutes 2 and tripping protection mechanism (not shown) with dynamic touching bridge cooperation, tripping protection Mechanism can be such that touching bridge separates with static contact and realize protection to disconnect electric circuit when the failures such as short circuit occurs in circuit. The motor starter of the invention includes three-phase, and each phase includes two side plates being oppositely arranged 11 and is connected to End plate 12 between the both ends of two side plates 11 is equipped with a dynamic touching bridge, two arc-chutes 2 and two exhausts in each phase Mechanism 5 moves touching bridge and is arranged between two arc-chutes 2 and two exhaust gears 5, certainly, the motor start-up of the invention Device is also possible to the structure of single-phase, two-phase or four phases, belongs to the protection scope of the invention.In addition, the invention The exhaust gear of dynamic touching bridge and device for switching can be used for breaker, can effectively improve motor starter and breaker Breaking capacity, the especially breaking capacity in short circuit.

It, cannot the above content is combining specific preferred embodiment to be further described to made by the invention Assert that the specific implementation of the invention is only limited to these instructions.For the ordinary skill of the invention technical field For personnel, without departing from the concept of the premise of the invention, a number of simple deductions or replacements can also be made, should all regard For the protection scope for belonging to the invention.

Claims (9)

1. a kind of exhaust gear of device for switching, including shell (1) and the contact mechanism being arranged in shell (1), feature Be: shell (1) is corresponding to be equipped with exhaust gear (5) in one end of contact mechanism, and exhaust gear (5) includes exhaust passage (51), Air discharge duct (52) are equipped on the side wall of exhaust passage (51) close to contact mechanism side, in exhaust passage (51) far from contact machine The side wall of structure side is equipped with gas vent (53), and gas vent (53) is shifted to install with air discharge duct (52).

2. the exhaust gear of device for switching according to claim 1, it is characterised in that: the exhaust gear (5) and touching Arc-chutes (2) are equipped between head mechanism, arc-chutes (2) are equipped with arc extinguishing air discharge duct (23) in the side towards exhaust gear (5), go out Arc air discharge duct (23) is shifted to install with air discharge duct (52).

3. the exhaust gear of device for switching according to claim 1, it is characterised in that: the contact mechanism includes opposite sets The dynamic touching bridge and static contact set, moving touching bridge includes contact plate (43), and the dynamic touching cooperated with static contact is equipped on contact plate (43) Point (44) is respectively equipped with arc leading angle (45) at the both ends of contact plate (43), and arc leading angle (45) is shifted to install with air discharge duct (52).

4. the exhaust gear of device for switching according to claim 1, it is characterised in that: the shell (1) includes two phases Side plate (11) to setting and the end plate (12) being connected between the both ends of two side plates (11), exhaust gear (5) packet It includes with end plate (12) spaced partition (54), the formation row vertical with side plate (11) between partition (54) and end plate (12) Gas channel (51), one end of partition (54) and the side plate (11) of side connect, and side plate (11) interval of the other end and the other side is set It sets to be formed air discharge duct (52), end plate (12) is equipped with gas vent (53) on one end far from air discharge duct (52).

5. the exhaust gear of device for switching according to claim 4, it is characterised in that: the exhaust gear (5) and touching Arc-chutes (2) are equipped between head mechanism, arc-chutes (2) include the fixed plate (21) being oppositely arranged with partition (54), and setting Multiple arc extinguishing grid pieces (22) on fixed plate (21) are equipped with arc extinguishing air discharge duct (23) on fixed plate (21), arc extinguishing air discharge duct (23) the distance H2 for the side plate (11) for arriving shell (1) is greater than or equal to the width H1 of the air discharge duct (52).

6. the exhaust gear of device for switching according to claim 5, it is characterised in that: the fixed plate (21) at U-shaped, It includes being oppositely arranged on the arc extinguishing side plate (25) of arc extinguishing grid pieces (22) two sides, and be connected to going out for arc extinguishing side plate (25) one end Arc partition (27), arc extinguishing grid pieces (22) are arranged in the inside of two arc extinguishing side plates (25), arc extinguishing partition (27) and arc extinguishing grid pieces (22) end cooperation, is equipped with arc extinguishing air discharge duct (23) on arc extinguishing partition (27), in the side point of arc extinguishing grid pieces (22) two sides The retaining convex rib (26) that She You not be connect with arc extinguishing side plate (25).

7. the exhaust gear of device for switching according to claim 3, it is characterised in that: the arc leading angle (45) is to far from dynamic The other side bending of contact (44) is equipped with striking notch between the side of arc leading angle (45) two sides and the end of contact plate (43) (42), the width a of arc leading angle (45) is made to be less than the width b of contact plate (43).

8. a kind of motor starter, it is characterised in that: including at least two device for switching as described in claim 1-7 is any Exhaust gear, contact mechanism include the dynamic touching bridge being arranged between two exhaust gears (5) and the both ends with dynamic touching bridge side The static contact being oppositely arranged.

9. motor starter according to claim 8, it is characterised in that: the both ends of the dynamic touching bridge and exhaust gear (5) arc-chutes (2) are equipped between, arc-chutes (2) include the arc extinguishing grid pieces (22) at multiple intervals, are equipped on arc extinguishing grid pieces (22) Arc extinguishing is open (24), is equipped with run-on tab (3) in the lower section of dynamic touching bridge, is correspondingly arranged under dynamic touching bridge in the middle part of run-on tab (3) Side, the both ends of run-on tab (3) reach the lower section of arc-chutes (2) respectively.