WO2017198165A1 - 一种直流断路器 - Google Patents

一种直流断路器 Download PDF

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Publication number
WO2017198165A1
WO2017198165A1 PCT/CN2017/084651 CN2017084651W WO2017198165A1 WO 2017198165 A1 WO2017198165 A1 WO 2017198165A1 CN 2017084651 W CN2017084651 W CN 2017084651W WO 2017198165 A1 WO2017198165 A1 WO 2017198165A1
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WO
WIPO (PCT)
Prior art keywords
plate
extension
gas generating
arc
arc extinguishing
Prior art date
Application number
PCT/CN2017/084651
Other languages
English (en)
French (fr)
Inventor
张延霞
赵彬
郑志浩
陈前中
Original Assignee
浙江人民电器有限公司
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 浙江人民电器有限公司 filed Critical 浙江人民电器有限公司
Priority to JP2018502151A priority Critical patent/JP6914909B2/ja
Publication of WO2017198165A1 publication Critical patent/WO2017198165A1/zh

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/34—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
    • H01H73/02—Details
    • H01H73/18—Means for extinguishing or suppressing arc
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
    • H01H73/02—Details
    • H01H73/04—Contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
    • H01H73/02—Details
    • H01H73/06—Housings; Casings; Bases; Mountings

Definitions

  • the invention relates to the technical field of a DC circuit breaker, and in particular to a DC circuit breaker.
  • the low-voltage circuit breaker is an important transmission and distribution electrical component, which plays an important role in distributing power protection equipment and personnel safety.
  • Low-voltage circuit breakers can be classified into AC circuit breakers and DC circuit breakers according to their use systems. Under normal working conditions, the low-voltage circuit breaker realizes the distribution and control of the electric load through the closing or opening of the contacts.
  • the circuit breaker detects the fault signal, and the trip unit acts to break the contact and disconnect the fault line.
  • the rapid arc-extinguishing is an important condition for ensuring reliable disconnection of the circuit breaker.
  • the Chinese patent document CN204067289U discloses a DC molded case circuit breaker comprising a first outer casing and a second outer casing which are detachably connected, an arc extinguishing chamber is arranged in the second outer casing, and a plurality of uniformly arranged arc extinguishing gratings are arranged in the arc extinguishing chamber.
  • the arc extinguishing chamber includes an upper port corresponding to the first outer casing, and the arc extinguishing chamber is provided with an gas generating frame corresponding to the arc extinguishing grid, and one end of the gas generating frame is disposed between the first outer casing and the upper port and covers the upper port.
  • the gas producing frame comprises two oppositely disposed gas generating arms, one end of the two gas generating arms is provided with a shielding baffle, and the shielding baffle is disposed between the first outer casing and the upper port and covers the upper port.
  • the DC molded case circuit breaker in the patent document although no permanent magnet is added to enhance the arc extinguishing effect, does not limit the positive and negative wiring forms of the circuit breaker, but is between the upper port of the arc extinguishing chamber and the first outer casing. A shielding plate is added.
  • the design can prevent the air pressure generated during arc combustion from leaking from the place and avoid breaking the first outer casing, the following problems occur: As can be seen from Fig. 6 of the specification, the breaking point of the moving and static contact is close to the second outer casing and away from the shielding plate. When the moving and static contact is broken to generate an arc, the gas generating arm closest to the arc is heated to generate gas, and the arc is pushed to close to the blocking.
  • the position of the plate moves; during the movement of the arc gradually approaching the shielding plate, under the shielding action of the shielding plate, the air pressure rises rapidly, which causes the movement of the arc to be hindered, thereby causing the moving distance to become shorter, under a large gas pressure.
  • the arc can only move up to the arc-extinguishing grid; due to the short moving distance of the arc, the upwardly moving arc can only contact the arc-extinguishing grid near the breaking point of the moving and static contact, and cannot fully utilize most of the arc-extinguishing
  • the grid piece causes the part of the arc-extinguishing grid to heat up rapidly, which is not conducive to the rapid cooling of the arc, and is not conducive to the rapid extinguishing of the arc. If the arc is still not extinguished after passing through the arc-extinguishing grid, the danger is brought about;
  • the moving and static contacts are purely in the form of point-to-point contact. When the current is large, the magnetic fields generated on the moving and static contacts have the same direction and attract each other, resulting in Difficult to break.
  • the technical problem to be solved by the present invention is to overcome the prior art DC circuit breaker to add a shielding plate between the first outer casing and the upper port of the arc extinguishing chamber, thereby causing the moving distance of the arc in the arc extinguishing chamber to be short, thereby causing It is not possible to make full use of most of the arc-extinguishing grids, so that the arc is not easy to extinguish and the technical and mechanical contacts are difficult to break, thereby providing a method for protecting the outer casing and making full use of most of the arc-extinguishing grid to improve the arc extinguishing effect, and Dynamic and static contacts break the easy DC circuit breaker.
  • the present invention provides a DC circuit breaker, comprising:
  • An arc extinguishing chamber mounted on the second housing and located inside the installation space, having a side opening opposite to the first housing;
  • a gas generating cover installed under the inner portion of the arc extinguishing chamber, including a first gas generating plate and a second gas generating plate disposed opposite to each other, and connecting the first gas generating plate and the second gas generating plate to form a shielding plate for accommodating a space, the shielding plate is disposed opposite to the side opening and adjacent to the second casing, and the first gas generating plate, the second gas generating plate and the shielding plate are both gas generating materials;
  • the breaking portion of the movable and static contacts is located inside the receiving space and close to the shielding plate;
  • the static contact has a first extension portion
  • the moving contact has a second extending portion, and when the moving and static contacts are in contact, the first extending portion is substantially parallel to the second extending portion, and the current direction is opposite after being energized;
  • An arc extinguishing grid having a plurality of, mounted on an interior of the arc extinguishing chamber, having a lower opening opposite to the receiving space, the opening of the lower opening being sized along the second housing to the first The direction of the housing gradually decreases.
  • the first housing is provided with a first extension plate opposite to the first gas generating plate, and a second extension plate opposite to the second gas generating plate, the first The extension plate and the second extension plate extend into the arc chamber, forming a space that communicates with the accommodation space and faces the arc-extinguised grid.
  • the first gas generating plate and the second gas generating plate are arranged in parallel, and the inner side surfaces of the first gas generating plate and the second gas generating plate are formed with a plurality of extending toward each other
  • the convex plate forms a groove between any two adjacent convex plates, and the extending length of the convex plate gradually increases in a direction away from the arc extinguishing grating.
  • first extension plate and the second extension plate are disposed obliquely to form the space between the upper opening and the lower opening.
  • the first extending portion is located outside the receiving space and substantially parallel to the shielding plate; the first extending portion has a static contact on the opposite side of the static contact
  • a static contact through hole is defined in the shielding baffle, and a movable contact of the movable contact located inside the receiving space is in contact connection with the static contact through the static contact through hole.
  • the static contact includes a first extension, a third extension disposed opposite the first extension, and a bottom end of the first extension and a bottom end of the third extension a first connecting portion, a second connecting portion connected to the top end of the third extending portion and extending horizontally in the direction of the first extending portion, and a connecting portion connected to the second connecting portion.
  • a protection plate having a first protection plate between the first extension portion and the third extension portion, and being connected to the first protection plate and located at a second protection plate between the second connecting portion and the arc extinguishing grid.
  • the protective plate is fixed to the gas generating cover by a connecting structure.
  • the first gas generating plate has a first extension extending outward from the shielding plate
  • the second gas generating plate has a second extension extending outward from the shielding plate.
  • a lower end of the portion of the gas generating cover adjacent to the shielding plate is closed, and a third extension portion extends outwardly from the shielding plate;
  • the first extension portion is provided with a first hook
  • the second extension a second hook is disposed on the first protection board
  • the first protection board is provided with a first card interface that can be engaged with the first hook, and a second card that is engaged with the second hook An interface; a space for accommodating the first connecting portion is formed between the first protection plate and the third extension portion.
  • a plurality of the arc extinguishing grids opposite to the second protection plate have a lower opening disposed thereon gradually decreasing in a direction close to the static contact, and the last one is extinguished The lower opening is not provided in the arc grid.
  • the arc extinguishing chamber is mounted on the second housing, and has a side opening opposite to the first housing, and the gas generating cover is installed below the interior of the arc extinguishing chamber, including the first oppositely disposed a gas generating plate, a second gas generating plate, and a shielding plate connecting the two, the shielding plate is opposite to the side opening and is disposed adjacent to the second casing, the movable and static contacts are installed inside the installation space, and the breaking portion is located inside the receiving space.
  • the first gas generating plate, the second gas generating plate and the shielding plate are triggered by a high-temperature arc, generating a large amount of gas, and the gas pushes the arc to move away from the shielding plate.
  • the gas generating plates on both sides are continuously heated by the gas, and the blowing arc accelerates upward obliquely; the plurality of arc extinguishing gratings installed above the arc extinguishing chamber are disposed on the side facing the receiving space.
  • the lower opening guides the arc into the gap between the arc-extinguishing grids to cool the arc to extinguish it; since the size of the lower opening gradually decreases in the direction from the second casing to the first casing, the arc is moving During the process, it is constantly blocked by the smaller arc-extinguishing grid of the lower opening, so that it cannot be punched out from the side opening of the arc extinguishing chamber, and can only enter the space between the arc-extinguishing grids, and utilize most of the arc chutes.
  • the film cools the arc to cause it to extinguish as soon as possible; the shielding plate not only prevents the arc from rushing out of the arc extinguishing chamber, but also forms a relatively closed receiving space with the first gas generating plate and the second gas generating plate, and is arced. After the high temperature excitation generates gas, the gas pressure is increased, and the arc can be accelerated to accelerate; compared with the prior art, the DC circuit breaker of the present invention does not It can only protect the first shell from being broken, and can fully utilize most of the arc-extinguishing grid to improve the arc-extinguishing effect;
  • the first extension portion and the second extension portion of the static and dynamic contact are substantially parallel, and the current direction is opposite after the energization, that is, after the energization, the first extension portion and the second extension portion are between the first extension portion and the second extension portion.
  • the direction of the magnetic field generated by the position is the same. When the moving and static contacts are disconnected, the magnetic field can drive the moving contact away from the static contact more quickly, thereby making the breaking of the moving and static contact easier.
  • the first housing is provided with a first extension plate opposite to the first gas generating plate, and the second extension plate opposite to the second gas generating plate, the first extension plate and the second extension
  • the plate extends into the arc extinguishing chamber to form a space which communicates with the receiving space and is opposite to the arc extinguishing grid; the space formed by the first extending plate and the second extending plate communicates with the receiving space to increase the level of the arc
  • the range of motion provides room to further reduce arc energy.
  • the inner surface of the first gas generating plate and the second gas generating plate are formed with a plurality of convex plates extending toward each other, and grooves are formed between any two adjacent convex plates; After the arc is generated and blown by the gas, the convex plate and the groove provided on the gas generating plate can increase the area of the arc in contact with the gas generating plate, which is favorable for reducing the temperature of the arc and facilitating the generation of a larger amount of gas blowing.
  • the moving arc moves upward; the extension length of the convex plate gradually increases in a direction away from the arc extinguishing grid, which can block the downward movement of the arc and prevent the arc from rushing out of the arc extinguishing chamber.
  • the DC circuit breaker of the present invention, the first extension plate and the second extension plate are obliquely arranged, and the space formed in the space is small in opening and small in opening, and can be matched with the gas generating cover to guide the arc upward into the arc-extinguishing grid. And prevent the arc from rushing out of the arc chamber.
  • the first extension portion is located outside the accommodation space and is substantially parallel to the shielding plate; the first extension portion has a static contact, and the static contact is opposite to the static contact, and the static contact is opened on the shielding plate
  • the through hole, the movable contact of the movable contact located inside the receiving space is in contact with the stationary contact through the static contact through hole.
  • the static contact includes a first extension portion, a third extension portion disposed opposite to the first extension portion, and a first connection portion connecting the bottom end portion of the first extension portion and the bottom end portion of the third extension portion, a second connecting portion connected to the top end of the third extending portion and extending horizontally in the direction of the first extending portion, and a connecting portion connected to the second connecting portion.
  • the first extension portion is substantially parallel to the shielding plate, so that the second extension portion of the movable contact can be conveniently paralleled, thereby further facilitating the breaking of the moving and static contact; the first connecting portion, the third
  • the arrangement of the extension portion, the second connection portion and the connection portion can save space, make the device as a whole compact, and arrange the wiring position reasonably.
  • the protection plate has a first protection plate between the first extension portion and the third extension portion, and is connected to the first protection plate and located at the second connection portion and the arc-extinguishing grid
  • the second protection board between.
  • the first protection plate can protect the first extension from being connected to the third extension only through the first connection portion, ensuring that the current direction on the first extension portion is opposite to the current direction on the second extension portion; the second protection plate can prevent arcing From the gap position of the arc chute, the contact with the static contact is ensured to ensure safety.
  • FIG. 1 is a schematic view showing the overall structure of an arc extinguishing device for a DC circuit breaker according to an embodiment of the present invention.
  • Figure 2 is a relative positional view of the first housing and the circuit breaker of Figure 1.
  • Figure 3 is an enlarged schematic view showing the structure of a portion A in Figure 2.
  • FIG. 4 is a relative positional view of the second housing and the circuit breaker of FIG. 1.
  • Fig. 5 is an enlarged schematic view showing the structure of a portion B in Fig. 4.
  • Figure 6 is a combined installation diagram of the arc extinguishing chamber, the arc chute, the gas generating cover, and the static contact.
  • Figure 7 is another view of Figure 6.
  • Figure 8 is a schematic view of the exploded structure of Figure 6.
  • Fig. 9 is a perspective view of the gas generating cover.
  • Figure 10 is a perspective view of the arc chute.
  • Figure 11 is an exploded structural view of the arc extinguishing labyrinth structure.
  • Figure 12 is an enlarged plan view showing a portion C of Figure 11;
  • Fig. 13 is a structural view showing a state in which the movable and static contacts are in contact connection.
  • the present embodiment provides a DC circuit breaker, as shown in FIG. 1-9, including: a first housing 1; a second housing 2 opposite to the first housing 1 and fixedly connected thereto to form an internal installation space 10; an arc extinguishing chamber 3 mounted on the second housing 2 and located inside the installation space 10 a side opening 30 opposite to the first casing 1; a gas generating cover 4 installed below the interior of the arc extinguishing chamber 3, including a first gas generating plate 41 and a second gas generating plate 42 disposed opposite to each other, And a shielding plate 43 connecting the first gas generating plate 41 and the second gas generating plate 42 to form an accommodating space 40, the shielding plate 43 is opposite to the side opening 30 and adjacent to the second casing 2
  • the first gas generating plate 41, the second gas generating plate 42 and the shielding plate 43 are both gas generating materials; the movable and static contacts 5, 6 are installed inside the installation space 10, and the moving a breaking portion of the stationary contacts 5, 6 is located inside the receiving space 40 and adjacent to
  • the first extending portion 61 is substantially parallel to the second extending portion 51, and the current direction is opposite after energization; a sheet 7 having a plurality of, mounted above the interior of the arc extinguishing chamber 3, having a lower opening 71 opposite the receiving space 40, the opening of the lower opening 71 being sized along the second housing 2 to The direction of the first housing 1 is gradually reduced (as shown in FIG. 10).
  • the first gas generating plate 41, the second gas generating plate 42 and the shielding plate 43 are triggered by a high-temperature arc, generating a large amount of gas, and the gas pushes the arc away from the shielding plate 43.
  • the gas generating plates 41, 42 on both sides are continuously heated to produce gas, and the blowing arc accelerates upward obliquely; a plurality of arc extinguishing grids 7 mounted above the arc extinguishing chamber 3 are oriented
  • a side of the accommodating space 40 is provided with a lower opening 71 for guiding the arc into the gap between the arc extinguishing grids 7 to cool the arc to be extinguished; since the size of the lower opening 71 is along the second casing 2 to the first shell
  • the direction of the body 1 is gradually reduced, and the arc is constantly blocked by the smaller arc-extinguishing grid 7 of the lower opening 71 during the movement, so that it cannot be flushed out from the side opening 30 of the arc extinguishing chamber 3, and can only enter
  • the space between the arc extinguishing grids 7 is cooled by the majority of the arc extinguishing grids 7 to cause them to be extinguished as soon as
  • the first housing 1 is provided with a first extension plate 11 opposite to the first gas generating plate 41, and a second extension opposite to the second gas generating plate 42.
  • the first extension plate 11 and the second extension plate 12 extend into the arc extinguishing chamber 3 to form a space 13 which communicates with the accommodation space 40 and is vertically opposed to the arc-extinguishing grid 7 .
  • the space 13 formed by the first extension plate 11 and the second extension plate 12 communicates with the accommodation space 40, increasing the horizontal range of motion of the arc, providing space for further reducing arc energy.
  • the first gas generating plate 41 and the second gas generating plate 42 are disposed in parallel, and the inner surfaces of the first gas generating plate 41 and the second gas generating plate 42 are formed.
  • a plurality of convex plates 44 extending toward each other, between any two adjacent convex plates 44, are formed with grooves 45, and the extending length of the convex plates 44 is gradually increased in a direction away from the arc extinguishing grids 7.
  • the convex plate 44 and the groove 45 provided on the gas generating plates 41, 42 can increase the area of the arc in contact with the gas generating plates 41, 42 and help to lower the temperature of the arc, and It is advantageous to generate a larger amount of gas blowing arc to move upward; the extension length of the convex plate 44 gradually increases away from the arc extinguishing grid piece 7, which can block the downward movement of the arc and prevent the arc from rushing out of the arc extinguishing chamber 3 .
  • the first extension plate 11 and the second extension plate 12 are disposed obliquely to form the space 13 having a large upper opening and a small lower opening.
  • the advantage of this arrangement is that the spacing space 13 can cooperate with the gas generating hood 4 to guide the arc upward into the arc chute 7 and prevent the arc from rushing out of the arc extinguishing chamber 3.
  • the lower opening 71 is an arcuate opening.
  • the arcuate opening better attracts the arc into the gap between the arc chutes 7.
  • the arc extinguishing chamber 3 includes a first partition 31 and a second partition 32 installed in the installation space 10, the first partition 31 and the second partition 32 is disposed opposite to form a space for mounting the gas generating cover 4 and the arc chute sheet 7.
  • the first gas generating plate 41 is parallel to the first separator 31, and the second gas generating plate 42 is parallel to the second separator 32; two opposite side walls of the arc extinguishing grid 7 And being respectively fixed on the first partition plate 31 and the second partition plate 32, and respectively located between the first gas generating plate 41 and the first partition plate 31, and the second gas generating plate 42 is between the second partition 32.
  • a labyrinth arc extinguishing structure 8 is also included (in this embodiment, the labyrinth
  • the arc extinguishing structure is formed by two parts butting each other, and the labyrinth arc extinguishing structure 8 is installed inside the installation space 10 and has a labyrinth channel 85, and one end of the labyrinth channel 85 is open and closed.
  • the arc grid 7 is opposite to receive an arc that is not extinguished, and the other end opening is in communication with the atmosphere.
  • the function of the labyrinth channel 85 is to receive an arc that has not been extinguished after passing through the arc chute 7 and further cool it to extinguish it; the labyrinth channel 85 not only increases the length of the arc, but also causes the arc to move. The resistance causes the arc to remain in the labyrinth channel 85 for a longer period of time, allowing for a more adequate cooling to facilitate arcing.
  • the labyrinth arc extinguishing structure 8 forms a sealed space 80 with the first casing 1 and the second casing 2, and the other end opening of the labyrinth channel 85 communicates with the sealed space 80.
  • the first housing 1 and/or the second housing 2 are provided with an exhaust port 14 communicating with the sealed space 80.
  • the labyrinth arc extinguishing structure 8 includes: side mounting plates 84, which are two and oppositely disposed; the first flat plate 81 has at least two layers, each of which has several, each of which is fixed at both ends thereof.
  • a first gap 811 is formed on an inner wall of the two side mounting plates 84, and any two of the first flat plates 81 of the same layer are formed, and the first flat plates 81 located on different layers are vertically opposite each other;
  • the plate 83 is at least one layer, and each layer has a plurality of upper and lower ends respectively connected to the two upper and lower first plates 81; the second plate 82 has one end fixed to the first vertical plate On the plate 83, the other end extends toward the other second riser 83 adjacent to the first riser 83, and forms a second gap 821 with the other of the second risers 83, the second flat plate 82
  • the first and second opposing gaps 811 are occluded, and a plurality of the first gaps 811 and a
  • the static contact 6 has a first extending portion 61
  • the movable contact 5 has a second extending portion 51.
  • the first The extension portion 51 is substantially parallel to the second extension portion 61, and the current directions are opposite when energized.
  • the direction of the magnetic field generated by the first extension portion 61 and the second extension portion 51 at the position between the first extension portion 61 and the second extension portion 51 is the same, when the movable and static contacts 5, 6 are broken, The magnetic field can drive the moving contact 5 away from the static contact 6 more quickly, thereby making the breaking of the moving and static contact easier.
  • the first extending portion 61 is located outside the receiving space 40, and The shielding plate 43 is substantially parallel; the first extending portion 61 has a static contact 60, and a static contact through hole 46 is defined in the shielding plate 43 opposite to the static contact 60.
  • the movable contact of the movable contact 5 inside the accommodating space 40 is in contact connection with the stationary contact 60 through the stationary contact through hole 46.
  • the static contact 6 includes a first extending portion 61, a third extending portion 63 opposite to the first extending portion 61, and a bottom end of the first extending portion 61 and a bottom end of the third extending portion 63. a first connecting portion 62, a second connecting portion 64 connected to the top end of the third extending portion 63 and extending horizontally in the direction of the first extending portion 61, and a connecting portion connected to the second connecting portion 64 65.
  • the arrangement of the first extension portion 61 and the shielding plate 43 is substantially parallel, so that the second extension portion 51 of the movable contact 5 can be conveniently paralleled, thereby making the dynamic and static contacts 5, 6 easier to break;
  • the arrangement of the first connecting portion 62, the third extending portion 63, the second connecting portion 64 and the connecting portion 65 can save space, make the device as a whole more compact, and arrange the wiring position reasonably.
  • a protective plate 9 is further provided, the protective plate 9 having a first protective plate 91 between the first extending portion 61 and the third extending portion 63, and is connected to the first protective plate 91 and located at a second protection plate 92 between the second connecting portion 64 and the arc extinguishing grid piece 7.
  • the first protection plate 91 can protect the first extension portion 61 from being connected to the third extension portion 63 only through the first connection portion 62, and ensure that the current direction on the first extension portion 61 is opposite to the current direction on the second extension portion 51;
  • the second protection plate 92 can prevent the arc from coming out of the gap position of the arc-extinguishing grid 7 and contacting the static contact 6 to ensure safety.
  • the protective plate 9 is fixed to the gas generating cover 4 by a joint structure.
  • the first gas generating plate 41 has a first extending portion 411 extending outward from the shielding plate 43
  • the second gas generating plate 42 has a second extending portion 421 extending outward from the shielding plate 43 .
  • a lower end of the portion of the gas generating cover 4 adjacent to the shielding plate 43 is closed, and a third extension portion 431 extends outwardly from the shielding plate 43.
  • the first extension portion 411 is provided with a first hook 412.
  • a second hook 422 is disposed on the second extension portion 421, and the first protection plate 91 is disposed to be matched with the first hook 412.
  • a first card interface 911 that is engaged with the second card interface 912 that is engaged with the second hook 422; a gap between the first protection plate 91 and the third extension portion 431 is formed for the accommodation
  • the space 432 of the first connecting portion 62 is described.
  • the lower opening 71 disposed thereon is gradually reduced in the direction of the opening adjacent to the stationary contact 6, and the last one of the arc extinguishing grids
  • the sheet 7 is not provided with the lower opening 71.

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Abstract

一种直流断路器，灭弧室（3）安装在第二壳体上（2），且具有与第一壳体（1）相对的侧开口（30），产气罩（4）安装在灭弧室的内部下方，包括相对设置的两个产气板（41、42）以及遮挡板（43），遮挡板与侧开口相对且靠近第二壳体设置，动静触头（5、6）安装在安装空间（10）内部，且分断处位于容纳空间（40）内部，并靠近遮挡板；当动静触头分断产生电弧时，产气板及遮挡板被电弧触发，产生大量气体推动电弧向着远离遮挡板的方向移动；安装在灭弧室内部上方的灭弧栅片（7）朝向容纳空间的一侧设有下部开口（71），下部开口的大小沿第二壳体至第一壳体的方向逐渐减小，电弧在移动的过程中，不断受到下部开口更小的灭弧栅片的阻挡，使其不能从灭弧室的侧开口冲出，而只能进入到灭弧栅片之间的空间尽快熄灭。该直流断路器不仅能保护第一壳体不被冲裂，还能充分利用大部分的灭弧栅片提高灭弧效果。

Description

一种直流断路器 技术领域
本发明涉及直流断路器技术领域，具体涉及一种直流断路器。
背景技术
低压断路器是一种重要的输配电电气元件，在线路中起着分配电能保护设备及人员安全的重要作用。低压断路器按其使用系统可分为交流断路器和直流断路器。在正常工作情况下，低压断路器通过触头的闭合或断开，实现对用电负荷的分配与控制。当线路中发生故障时，断路器检测到故障信号，脱扣器动作，使触头分断，断开故障线路。当线路中发生短路故障时，在分断短路电流时，快速的熄灭电弧是保障断路器可靠分断的重要条件。在交流系统中，由于交流电具有过零点，电弧的熄灭相对容易，而直流电没有过零点，电弧的熄灭相对来说比较困难。目前比较流行的做法是通过加装永磁体来加强灭弧效果，此种方法虽有利于灭弧，但限制了断路器的正负极接线形式。
中国专利文献CN204067289U公开了一种直流塑壳断路器，包括可拆卸连接的第一外壳和第二外壳，第二外壳内设有灭弧室，灭弧室内设有若干均布的灭弧栅片，灭弧室包括与第一外壳对应的上端口，灭弧室内与灭弧栅片对应设有产气架，产气架的一端设于第一外壳与上端口之间且覆盖上端口。产气架包括两个相对设置的产气臂，两个产气臂的一端设有遮挡板，遮挡板设于第一外壳与上端口之间且覆盖上端口。
该专利文献中的直流塑壳断路器，虽然没有加装永磁体来加强灭弧效果，不会限制断路器的正负极接线形式，然而其在灭弧室的上端口和第一外壳之间增设了遮挡板，这样的设计方案虽然可以避免电弧燃烧时产生的气压从该处泄漏，且能够避免冲裂第一外壳，但是会出现以下问题：从其 说明书的附图6可以看出，动静触头的分断点靠近第二外壳，且远离遮挡板，当动静触头分断产生电弧时，最靠近电弧的产气臂受热产气，推动电弧向靠近遮挡板的位置移动；在电弧逐渐靠近遮挡板的移动过程中，在遮挡板的遮挡作用下，气压迅速升高，进而导致电弧的运动受阻，进而导致移动距离变短，在较大的气体压力下，电弧只能往上向灭弧栅片移动；由于电弧的移动距离短，向上运动的电弧只能与靠近动静触头分断点的这部分灭弧栅片接触，不能充分利用大部分的灭弧栅片，导致该部分灭弧栅片升温迅速，不利于电弧的快速降温，进而不利于电弧的快速熄灭，如果穿过灭弧栅片后电弧仍未熄灭，就会带来危险；现有技术中的动静触头纯粹以传统点对点的形式接触，在电流较大时，动静触头上产生的磁场方向相同，具有吸引彼此的作用，导致分断困难。
发明内容
因此，本发明要解决的技术问题在于克服现有技术中的直流断路器在第一外壳与灭弧室的上端口之间增设遮挡板，导致电弧在灭弧室内的移动距离变短，进而导致不能充分利用大部分灭弧栅片，以致电弧不易熄灭且动静触头分断困难的技术缺陷，从而提供一种既能保护外壳，又能充分利用大部分的灭弧栅片提高灭弧效果，且动静触头分断容易的直流断路器。
为此，本发明提供一种直流断路器，其特征在于：包括：
第一壳体；
第二壳体，与所述第一壳体相对并与其固定连接，以形成内部安装空间；
灭弧室，安装在所述第二壳体上并位于所述安装空间内部，具有与所述第一壳体相对的侧开口；
产气罩，安装在所述灭弧室的内部下方，包括相对设置的第一产气板和第二产气板，以及连接所述第一产气板和所述第二产气板以形成容纳空间的遮挡板，所述遮挡板与所述侧开口相对且靠近所述第二壳体设置，所述第一产气板、第二产气板和所述遮挡板均为产气材质；
动、静触头，安装在所述安装空间内部，所述动、静触头的分断处位于所述容纳空间内部，且靠近所述遮挡板；所述静触头具有第一延伸部，所述动触头具有第二延伸部，所述动、静触头接触时，所述第一延伸部与所述第二延伸部基本平行，且通电后电流方向相反；
灭弧栅片，具有若干个,安装在所述灭弧室的内部上方,具有与所述容纳空间相对的下部开口，所述下部开口的开口大小沿所述第二壳体至所述第一壳体方向逐渐减小。
作为一种优选方案，所述第一壳体上设有与所述第一产气板相对的第一延长板，以及与所述第二产气板相对的第二延长板，所述第一延长板和第二延长板伸入所述灭弧室内部，形成与所述容纳空间连通、并与所述灭弧栅片上下相对的间隔空间。
作为一种优选方案，所述第一产气板和所述第二产气板平行设置，且所述第一产气板和所述第二产气板的内侧面上成型有若干向着彼此延伸的凸起板，任意相邻两个凸起板之间形成沟槽，所述凸起板的延伸长度沿远离所述灭弧栅片的方向逐渐增大。
作为一种优选方案，所述第一延长板和所述第二延长板倾斜设置，形成上开口大下开口小的所述间隔空间。
作为一种优选方案，所述第一延伸部位于所述容纳空间外部，且与所述遮挡板基本平行；所述第一延伸部上具有静触点，与所述静触点相对的在所述遮挡板上开设有静触点通孔，位于所述容纳空间内部的所述动触头的动触点通过所述静触点通孔与所述静触点接触连接。
作为一种优选方案，所述静触头包括第一延伸部，与所述第一延伸部相对设置的第三延伸部，连接所述第一延伸部底端和所述第三延伸部底端的第一连接部，与所述第三延伸部的顶端连接、且向着所述第一延伸部方向水平延伸的第二连接部，以及与所述第二连接部连接的接线部。
作为一种优选方案，还包括保护板，所述保护板具有位于所述第一延伸部和所述第三延伸部之间的第一保护板，和与所述第一保护板连接，且位于所述第二连接部和所述灭弧栅片之间的第二保护板。
作为一种优选方案，所述保护板通过连接结构固定在所述产气罩上。
作为一种优选方案，所述第一产气板具有从所述遮挡板向外延伸的第一延长部，所述第二产气板具有从所述遮挡板向外延伸的第二延长部，所述产气罩的靠近所述遮挡板的部分下端封闭、并从所述遮挡板向外延伸出第三延长部；所述第一延长部上设有第一卡钩，所述第二延长部上设有第二卡钩，所述第一保护板上设有能够与所述第一卡钩配合卡接的第一卡接口，以及与所述第二卡钩配合卡接的第二卡接口；所述第一保护板与所述第三延长部之间形成用于容纳所述第一连接部的空间。
作为一种优选方案，与所述第二保护板相对的若干个所述灭弧栅片，其上设置的下部开口沿靠近所述静触头的方向开口逐渐减小，且最后一个所述灭弧栅片不设置所述下部开口。
本发明提供的直流断路器，具有以下优点：
1.本发明的直流断路器，灭弧室安装在第二壳体上，且具有与第一壳体相对的侧开口，产气罩安装在灭弧室的内部下方，包括相对设置的第一产气板、第二产气板以及连接两者的遮挡板，遮挡板与侧开口相对且靠近第二壳体设置，动、静触头安装在安装空间内部，且分断处位于容纳空间内部，并靠近遮挡板；当动、静触头分断产生电弧时，第一产气板、第二产气板以及遮挡板被高温的电弧触发，产生大量气体，气体推动电弧向着远离遮挡板的方向移动，电弧在移动的过程中，两侧的产气板不断受热产气，吹动电弧向斜上方加速运动；安装在灭弧室内部上方的若干个灭弧栅片朝向容纳空间的一侧设有下部开口，引导电弧进入灭弧栅片之间的缝隙，对电弧进行降温，使其熄灭；由于下部开口的大小沿第二壳体至第一壳体的方向逐渐减小，电弧在移动的过程中，不断受到下部开口更小的灭弧栅片的阻挡，使其不能从灭弧室的侧开口冲出，只能进入到灭弧栅片之间的空间，利用大部分的灭弧栅片对电弧进行降温，促使其尽快熄灭；遮挡板不仅能防止电弧冲出灭弧室，还与第一产气板、第二产气板围合形成了一个相对封闭的容纳空间，在被电弧的高温激发产生气体后，增大了气体压力，能够吹动电弧加速运动；与现有技术相比，本发明的直流断路器，不 仅能保护第一壳体不被冲裂，还能充分利用大部分的灭弧栅片提高灭弧效果；
动静触头的第一延伸部和第二延伸部基本平行，且通电后电流方向相反，也即通电后，第一延伸部和第二延伸部在第一延伸部和第二延伸部之间的位置产生的磁场方向相同，当动、静触头分断时，该磁场能够驱动动触头更快的远离静触头，从而使动静触头的分断变的容易。
2.本发明的直流断路器，第一壳体上设有与第一产气板相对的第一延长板，与第二产气板相对的第二延长板，第一延长板和第二延长板伸入灭弧室内部，形成与容纳空间连通、并与灭弧栅片上下相对的间隔空间；第一延长板和第二延长板形成的间隔空间与容纳空间连通，增大了电弧的水平运动范围，为进一步减弱电弧能量提供了空间。
3.本发明的直流断路器，第一产气板和第二产气板的内侧面上成形有若干向着彼此延伸的凸起板，任意相邻的两个凸起板之间形成沟槽；电弧产生并被气体吹动后，产气板上设置的凸起板以及沟槽，能够增大电弧与产气板接触的面积，有利于降低电弧的温度，并有利于产生更大量的气体吹动电弧向上运动；凸起板的延伸长度沿远离灭弧栅片的方向逐渐增大，可以阻挡电弧向下运动，防止电弧向下冲出灭弧室。
4.本发明的直流断路器，第一延长板和第二延长板倾斜设置，形成的间隔空间上开口大下开口小，能够与产气罩配合，起到引导电弧向上进入灭弧栅片，并防止电弧向下冲出灭弧室的作用。
5.本发明的直流断路器，第一延伸部位于容纳空间外部，且与遮挡板基本平行；第一延伸部上具有静触点，与静触点相对的在遮挡板上开设有静触点通孔，位于容纳空间内部的动触头的动触点通过静触点通孔与静触点接触连接。这种设置方式能够使动静触头的分断点尽可能近的靠近遮挡板，动静触头分断后产生的电弧能够同时影响两个产气板及遮挡板，从而迅速产生大量气体，推动电弧迅速移动。
6.本发明的直流断路器，静触头包括第一延伸部，与第一延伸部相对设置的第三延伸部，连接第一延伸部底端和第三延伸部底端的第一连接部， 与第三延伸部的顶端连接、且向着第一延伸部方向水平延伸的第二连接部，以及与第二连接部连接的接线部。该种设置方式，使得第一延伸部与遮挡板基本平行，从而能够方便地实现与动触头的第二延伸部相平行，进而实现动静触头更容易的分断；第一连接部，第三延伸部，第二连接部以及接线部的设置方式，能够节约空间，使设备整体更紧凑，且合理的安排了接线位置。
7.本发明的直流断路器，保护板具有位于第一延伸部和第三延伸部之间的第一保护板，和与第一保护板连接，且位于第二连接部和灭弧栅片之间的第二保护板。第一保护板能够保护第一延伸部仅通过第一连接部与第三延伸部连接，保证第一延伸部上的电流方向与第二延伸部上的电流方向相反；第二保护板能防止电弧从灭弧栅片的缝隙位置窜出与静触头接触，保证安全。
附图说明
为了更清楚地说明现有技术或本发明具体实施方式中的技术方案，下面对现有技术或具体实施方式描述中所使用的附图作简单介绍，显而易见地，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1是本发明实施例中直流断路器灭弧装置的整体结构示意图。
图2是图1中第一壳体与断路器的相对位置图。
图3是图2中A部分的结构放大示意图。
图4是图1中第二壳体与断路器的相对位置图。
图5是图4中B部分的结构放大示意图。
图6是灭弧室、灭弧栅片、产气罩以及静触头的组合安装图。
图7是图6的另一视图。
图8是图6的爆炸结构示意图。
图9是产气罩的立体图。
图10是灭弧栅片的立体图。
图11是灭弧迷宫结构的爆炸结构图。
图12是图11中C部分的结构放大图。
图13是动静触头接触连接时的结构图。
附图标记：1-第一壳体，11-第一延长板，12-第二延长板，13-间隔空间，14-排气口，2-第二壳体，10-安装空间，3-灭弧室，30-侧开口，31-第一隔板，32-第二隔板，4-产气罩，40-容纳空间，41-第一产气板，411-第一延长部，412-第一卡钩，42-第二产气板，421-第二延长部，422-第二卡钩，43-遮挡板，431-第三延长部，432-空间，44-凸起板，45-沟槽，46-静触点通孔，5-动触头，51-第二延伸部，6-静触头，60-静触点，61-第一延伸部，62-第一连接部，63-第三延伸部，64-第二连接部，65-接线部，7-灭弧栅片，71-下部开口，8-迷宫灭弧结构，80-密封空间，81-第一平板，811-第一间隙，82-第二平板，821-第二间隙，83-第一竖板，84-侧安装板，85-迷宫通道，9-保护板，91-第一保护板，911-第一卡接口，912-第二卡接口，92-第二保护板。
具体实施方式
下面结合说明书附图对本发明的技术方案进行描述，显然，下述的实施例不是本发明全部的实施例。基于本发明所描述的实施例，本领域普通技术人员在没有做出其他创造性劳动前提下所获得的所有其他实施例，都属于本发明的保护范围。
需要说明的是，在本发明的描述中，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性。此外，下面所描述的本发明不同实施方式中所涉及的技术特征只要彼此之间未构成冲突就可以相互结合。
实施例
本实施例提供一种直流断路器，如图1-9所示，包括：第一壳体1；第 二壳体2，与所述第一壳体1相对并与其固定连接，以形成内部安装空间10；灭弧室3，安装在所述第二壳体2上并位于所述安装空间10内部，具有与所述第一壳体1相对的侧开口30；产气罩4，安装在所述灭弧室3的内部下方，包括相对设置的第一产气板41和第二产气板42，以及连接所述第一产气板41和所述第二产气板42以形成容纳空间40的遮挡板43，所述遮挡板43与所述侧开口30相对且靠近所述第二壳体2设置，所述第一产气板41、第二产气板42和所述遮挡板43均为产气材质；动、静触头5，6，安装在所述安装空间10内部，所述动、静触头5,6的分断处位于所述容纳空间40内部，且靠近所述遮挡板43；所述静触头6具有第一延伸部61，所述动触头5具有第二延伸部51，所述动、静触头5，6接触时，所述第一延伸部61与所述第二延伸部51基本平行，且通电后电流方向相反；灭弧栅片7，具有若干个,安装在所述灭弧室3的内部上方,具有与所述容纳空间40相对的下部开口71，所述下部开口71的开口大小沿所述第二壳体2至所述第一壳体1方向逐渐减小(如图10所示)。
当动、静触头5、6分断产生电弧时，第一产气板41、第二产气板42以及遮挡板43被高温的电弧触发，产生大量气体，气体推动电弧向着远离遮挡板43的方向移动，电弧在移动的过程中，两侧的产气板41,42不断受热产气，吹动电弧向斜上方加速运动；安装在灭弧室3内部上方的若干个灭弧栅片7朝向容纳空间40的一侧设有下部开口71，引导电弧进入灭弧栅片7之间的缝隙，对电弧进行降温，使其熄灭；由于下部开口71的大小沿第二壳体2至第一壳体1的方向逐渐减小，电弧在移动的过程中，不断受到下部开口71更小的灭弧栅片7的阻挡，使其不能从灭弧室3的侧开口30冲出，只能进入到灭弧栅片7之间的空间，利用大部分的灭弧栅片7进行降温，促使其尽快熄灭；遮挡板43不仅能防止电弧冲出灭弧室3，还与第一产气板41、第二产气板42围合形成了一个相对封闭的容纳空间40，在被电弧的高温激发产生气体后，增大了气体压力，能够吹动电弧加速运动；与现有技术相比，本实施例的直流断路器，不仅能保护第一壳体1不被冲裂，还能充分利用大部分的灭弧栅片7提高灭弧效果。
如图2-3所示，所述第一壳体1上设有与所述第一产气板41相对的第一延长板11，以及与所述第二产气板42相对的第二延长板12，所述第一延长板11和第二延长板12伸入所述灭弧室3内部，形成与所述容纳空间40连通、并与所述灭弧栅片7上下相对的间隔空间13。第一延长板11和第二延长板12形成的间隔空间13与容纳空间40连通，增大了电弧的水平运动范围，为进一步减弱电弧能量提供了空间。
如图6所示，所述第一产气板41和所述第二产气板42平行设置，且所述第一产气板41和所述第二产气板42的内侧面上成形有若干向着彼此延伸的凸起板44，任意相邻两个凸起板44之间形成沟槽45，所述凸起板44的延伸长度沿远离所述灭弧栅片7的方向逐渐增大。电弧产生并被气体吹动后，产气板41,42上设置的凸起板44以及沟槽45，能够增大电弧与产气板41,42接触的面积，有利于降低电弧的温度，并有利于产生更大量的气体吹动电弧向上运动；凸起板44的延伸长度沿远离灭弧栅片7的方向逐渐增大，可以阻挡电弧向下运动，防止电弧向下冲出灭弧室3。
所述第一延长板11和所述第二延长板12倾斜设置，形成上开口大下开口小的所述间隔空间13。这样设置的好处的在于，间隔空间13能够与产气罩4配合，起到引导电弧向上进入灭弧栅片7，并防止电弧向下冲出灭弧室3的作用。
所述下部开口71为圆弧形开口。圆弧形的开口能够更好地吸引电弧进入灭弧栅片7之间的缝隙。
如图6-7所示，所述灭弧室3包括在所述安装空间10内安装的第一隔板31和第二隔板32，所述第一隔板31和所述第二隔板32相对设置以形成用于安装所述产气罩4和所述灭弧栅片7的空间。
所述第一产气板41与所述第一隔板31平行相对，所述第二产气板42与所述第二隔板32平行相对；所述灭弧栅片7的两相对侧壁分别固定在所述第一隔板31和所述第二隔板32上，并分别位于所述第一产气板41和所述第一隔板31之间，以及所述第二产气板42和所述第二隔板32之间。
如图6、7、11和12所示，还包括迷宫灭弧结构8(本实施例中，迷宫 灭弧结构由两部分对接形成，也可以设置成一个)，所述迷宫灭弧结构8安装在所述安装空间10内部，并具有迷宫通道85，所述迷宫通道85的一端开口与所述灭弧栅片7相对以接收未被熄灭的电弧，另一端开口与大气连通。迷宫通道85的作用在于接收经过灭弧栅片7后仍未熄灭的电弧，并对其进行进一步的降温，使其熄灭；迷宫通道85不仅增加了电弧的运动长度，还给电弧的运动造成了阻力，使得电弧在迷宫通道85内存留的时间更长，能够更充分的降温，以利于电弧的熄灭。
如图4所示，所述迷宫灭弧结构8与所述第一壳体1、第二壳体2形成密封空间80，所述迷宫通道85的另一端开口与所述密封空间80连通，所述第一壳体1和/或所述第二壳体2上设有与所述密封空间80连通的排气口14。
具体的，所述迷宫灭弧结构8包括：侧安装板84，为两个且相对设置；第一平板81，至少为两层，每一层均有若干个，每一个的两端都固定在两个所述侧安装板84的内壁上，且同一层的任意两个所述第一平板81之间形成第一间隙811，位于不同层上的所述第一平板81上下相对；第一竖板83，至少为一层，每一层均有若干个，每一个的上下两端分别与上下相对的两个所述第一平板81连接；第二平板82，一端固定在所述第一竖板83上，另一端朝向与所述第一竖板83靠近的另一个第二竖板83延伸，并与另一个所述第二竖板83形成第二间隙821，所述第二平板82将上下相对的两个所述第一间隙811遮挡，若干个所述第一间隙811和若干个所述第二间隙821形成所述迷宫通道85。
如图13所示，所述静触头6具有第一延伸部61，所述动触头5具有第二延伸部51，所述动、静触头5，6接触连接时，所述第一延伸部51与所述第二延伸部61基本平行，且通电后电流方向相反。当通电后，第一延伸部61和第二延伸部51在第一延伸部61和第二延伸部51之间的位置产生的磁场方向相同，当动、静触头5、6分断时，该磁场能够驱动动触头5更快的远离静触头6，从而使动静触头的分断变的容易。
如图6-8所示，所述第一延伸部61位于所述容纳空间40外部，且与 所述遮挡板43基本平行；所述第一延伸部61上具有静触点60，与所述静触点60相对的在所述遮挡板43上开设有静触点通孔46，位于所述容纳空间40内部的所述动触头5的动触点通过所述静触点通孔46与所述静触点60接触连接。这种设置方式能够使动静触头5,6的分断点尽可能近的靠近遮挡板43，动静触头5,6分断后产生的电弧能够同时影响两个产气板41,42及遮挡板43，从而迅速产生大量气体，推动电弧迅速移动。
所述静触头6包括第一延伸部61，与所述第一延伸部61相对设置的第三延伸部63，连接所述第一延伸部61底端和所述第三延伸部63底端的第一连接部62，与所述第三延伸部63的顶端连接、且向着所述第一延伸部61方向水平延伸的第二连接部64，以及与所述第二连接部64连接的接线部65。该种设置方式，使得第一延伸部61与遮挡板43基本平行，从而能够方便地实现与动触头5的第二延伸部51相平行，进而实现动静触头5,6更容易的分断；第一连接部62，第三延伸部63，第二连接部64以及接线部65的设置方式，能够节约空间，使设备整体更紧凑，且合理的安排了接线位置。
还包括保护板9，所述保护板9具有位于所述第一延伸部61和所述第三延伸部63之间的第一保护板91，和与所述第一保护板91连接，且位于所述第二连接部64和所述灭弧栅片7之间的第二保护板92。第一保护板91能够保护第一延伸部61仅通过第一连接部62与第三延伸部63连接，保证第一延伸部61上的电流方向与第二延伸部51上的电流方向相反；第二保护板92能防止电弧从灭弧栅片7的缝隙位置窜出与静触头6接触，保证安全。
所述保护板9通过连接结构固定在所述产气罩4上。所述第一产气板41具有从所述遮挡板43向外延伸的第一延长部411，所述第二产气板42具有从所述遮挡板43向外延伸的第二延长部421，所述产气罩4的靠近所述遮挡板43的部分下端封闭、并从所述遮挡板43向外延伸出第三延长部431；所述第一延长部411上设有第一卡钩412，所述第二延长部421上设有第二卡钩422，所述第一保护板91上设有能够与所述第一卡钩412配合 卡接的第一卡接口911，以及与所述第二卡钩422配合卡接的第二卡接口912；所述第一保护板91与所述第三延长部431之间形成用于容纳所述第一连接部62的空间432。
与所述第二保护板92相对的若干个所述灭弧栅片7，其上设置的下部开口71沿靠近所述静触头6的方向开口逐渐减小，且最后一个所述灭弧栅片7不设置所述下部开口71。这样的结构设计，能够尽可能的阻挡电弧进入位于第二保护板92下方的灭弧栅片7，进而避免电弧从该位置冲出与静触头6接触，保证安全。
显然，上述实施例仅仅是为清楚地说明所作的举例，而并非对实施方式的限定。对于所属领域的普通技术人员来说，在上述说明的基础上还可以做出其它不同形式的变化或变动。这里无需也无法对所有的实施方式予以穷举。而由此所引伸出的显而易见的变化或变动仍处于本发明创造的保护范围之中。

Claims (10)

  1. 一种直流断路器，其特征在于：包括：
    第一壳体(1)；
    第二壳体(2)，与所述第一壳体(1)相对并与其固定连接，以形成内部安装空间(10)；
    灭弧室(3)，安装在所述第二壳体(2)上并位于所述安装空间(10)内部，具有与所述第一壳体(1)相对的侧开口(30)；
    产气罩(4)，安装在所述灭弧室(3)的内部下方，包括相对设置的第一产气板(41)和第二产气板(42)，以及连接所述第一产气板(41)和所述第二产气板(42)以形成容纳空间(40)的遮挡板(43)，所述遮挡板(43)与所述侧开口(30)相对且靠近所述第二壳体(2)设置，所述第一产气板(41)、第二产气板(42)和所述遮挡板(43)均为产气材质；
    动、静触头(5，6)，安装在所述安装空间(10)内部，所述动、静触头(5,6)的分断处位于所述容纳空间(40)内部，且靠近所述遮挡板(43)；所述静触头(6)具有第一延伸部(61)，所述动触头(5)具有第二延伸部(51)，所述动、静触头(5，6)接触时，所述第一延伸部(61)与所述第二延伸部(51)基本平行，且通电后电流方向相反；
    灭弧栅片(7)，具有若干个,安装在所述灭弧室(3)的内部上方,具有与所述容纳空间(40)相对的下部开口(71)，所述下部开口(71)的开口大小沿所述第二壳体(2)至所述第一壳体(1)方向逐渐减小。
  2. 根据权利要求1所述的直流断路器，其特征在于：所述第一壳体(1)上设有与所述第一产气板(41)相对的第一延长板(11)，以及与所述第二产气板(42)相对的第二延长板(12)，所述第一延长板(11)和第二延长板(12)伸入所述灭弧室(3)内部，形成与所述容纳空间(40)连通、并与所述灭弧栅片(7)上下相对的间隔空间(13)。
  3. 根据权利要求2所述的直流断路器，其特征在于：所述第一产气板(41)和所述第二产气板(42)平行设置，且所述第一产气板(41)和所述第二产气板(42)的内侧面上成型有若干向着彼此延伸的凸起板(44)， 任意相邻两个凸起板(44)之间形成沟槽(45)，所述凸起板(44)的延伸长度沿远离所述灭弧栅片(7)的方向逐渐增大。
  4. 根据权利要求2或3所述的直流断路器，其特征在于：所述第一延长板(11)和所述第二延长板(12)倾斜设置，形成上开口大下开口小的所述间隔空间(13)。
  5. 根据权利要求1-4中任一项所述的直流断路器，其特征在于：所述第一延伸部(61)位于所述容纳空间(40)外部，且与所述遮挡板(43)基本平行；所述第一延伸部(61)上具有静触点(60)，与所述静触点(60)相对的在所述遮挡板(43)上开设有静触点通孔(46)，位于所述容纳空间(40)内部的所述动触头(5)的动触点通过所述静触点通孔(46)与所述静触点(60)接触连接。
  6. 根据权利要求5所述的直流断路器，其特征在于：所述静触头(6)包括第一延伸部(61)，与所述第一延伸部(61)相对设置的第三延伸部(63)，连接所述第一延伸部(61)底端和所述第三延伸部(63)底端的第一连接部(62)，与所述第三延伸部(63)的顶端连接、且向着所述第一延伸部(61)方向水平延伸的第二连接部(64)，以及与所述第二连接部(64)连接的接线部(65)。
  7. 根据权利要求6所述的直流断路器，其特征在于：还包括保护板(9)，所述保护板(9)具有位于所述第一延伸部(61)和所述第三延伸部(63)之间的第一保护板(91)，和与所述第一保护板(91)连接，且位于所述第二连接部(64)和所述灭弧栅片(7)之间的第二保护板(92)。
  8. 根据权利要求7所述的直流断路器，其特征在于：所述保护板(9)通过连接结构固定在所述产气罩(4)上。
  9. 根据权利要求8所述的直流断路器，其特征在于：所述第一产气板(41)具有从所述遮挡板(43)向外延伸的第一延长部(411)，所述第二产气板(42)具有从所述遮挡板(43)向外延伸的第二延长部(421)，所述产气罩(4)的靠近所述遮挡板(43)的部分下端封闭、并从所述遮挡板(43)向外延伸出第三延长部(431)；所述第一延长部(411)上设有第一 卡钩(412)，所述第二延长部(421)上设有第二卡钩(422)，所述第一保护板(91)上设有能够与所述第一卡钩(412)配合卡接的第一卡接口(911)，以及与所述第二卡钩(422)配合卡接的第二卡接口(912)；所述第一保护板(91)与所述第三延长部(431)之间形成用于容纳所述第一连接部(62)的空间(432)。
  10. 根据权利要求7所述的直流断路器，其特征在于：与所述第二保护板(92)相对的若干个所述灭弧栅片(7)，其上设置的下部开口(71)沿靠近所述静触头(6)的方向开口逐渐减小，且最后一个所述灭弧栅片(7)不设置所述下部开口(71)。
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CN108987209A (zh) * 2018-09-25 2018-12-11 西安柏泰电气有限公司 一种灭弧罩
CN111527576A (zh) * 2017-12-27 2020-08-11 Ls电气株式会社 直流断路器
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CN113871272A (zh) * 2021-08-20 2021-12-31 德力西电气有限公司 栅片灭弧室及断路器
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