WO2016029537A1 - 高压直流接触器 - Google Patents

高压直流接触器 Download PDF

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Publication number
WO2016029537A1
WO2016029537A1 PCT/CN2014/089345 CN2014089345W WO2016029537A1 WO 2016029537 A1 WO2016029537 A1 WO 2016029537A1 CN 2014089345 W CN2014089345 W CN 2014089345W WO 2016029537 A1 WO2016029537 A1 WO 2016029537A1
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WO
WIPO (PCT)
Prior art keywords
contact
top block
static contact
arc extinguishing
disposed
Prior art date
Application number
PCT/CN2014/089345
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English (en)
French (fr)
Inventor
齐东才
朱红锋
Original Assignee
深圳市品川新智科技发展有限公司
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Application filed by 深圳市品川新智科技发展有限公司 filed Critical 深圳市品川新智科技发展有限公司
Publication of WO2016029537A1 publication Critical patent/WO2016029537A1/zh

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/16—Magnetic circuit arrangements
    • H01H50/36—Stationary parts of magnetic circuit, e.g. yoke
    • H01H50/38—Part of main magnetic circuit shaped to suppress arcing between the contacts of the relay
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/54—Contact arrangements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/64—Driving arrangements between movable part of magnetic circuit and contact
    • 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
    • H01H9/44—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet
    • H01H9/443—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet using permanent magnets
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/02—Bases; Casings; Covers
    • H01H50/023—Details concerning sealing, e.g. sealing casing with resin
    • H01H2050/025—Details concerning sealing, e.g. sealing casing with resin containing inert or dielectric gasses, e.g. SF6, for arc prevention or arc extinction

Definitions

  • the present invention relates to the field of electronic components, and more particularly to a high voltage DC contactor.
  • the general contactors can be roughly divided into the following two categories: AC contactors and DC contactors, and DC contactors are mainly based on high voltage DC contactors.
  • the operating principle and structure of the high-voltage DC contactor are basically the same as those of the AC contactor.
  • the main difference is that the current of the main circuit of the high-voltage DC contactor is DC, and the current of the main circuit of the AC contactor is AC. of.
  • a general contactor generally includes an outer casing, an arc extinguishing chamber disposed in the outer casing, two static contact heads disposed in the arc extinguishing chamber, and two movable contact heads movable up and down, and an integrated setting between the two movable contact heads The two-moving contact head is moved such that the two movable contact heads are simultaneously contacted or separated from the corresponding two static contact heads to achieve communication or disconnection of the contactor.
  • the contactor is generally used to control the on and off of a large current. Therefore, when the contactor is suddenly disconnected from the connected state, that is, when the two movable contact heads are separately separated from the two static contact heads, they are separately generated.
  • An electric arc Since the instantaneous temperature of the arc can reach above 1000 degrees Celsius, it is easy to cause damage to various parts inside the contactor, such as burning the inner wall of the arc extinguishing chamber, or even burning the static contact head or the moving contact head, thereby affecting The life of the contactor.
  • the AC contactor controls the on and off of the AC, we know that the magnitude and direction of the AC will change periodically with time. That is, the instantaneous value of the AC current can be zero. Therefore, the AC contactor can pass. It is instantaneously controlled to avoid the occurrence of arcing inside when the instantaneous value of the alternating current value is zero.
  • the high-voltage DC contactor controls the on-off of high-voltage DC, that is, the high-voltage DC contactor cannot use the above method to avoid arcing inside. Therefore, how to reduce the influence of arc in the high-voltage DC contactor and prolong The service life of high voltage DC contactors has become an urgent problem in the industry.
  • the object of the present invention is to overcome the deficiencies of the prior art and to provide a high voltage DC contactor with simple structure, less arcing and long service life.
  • a high voltage DC contactor comprising: a housing, an arc extinguishing chamber, a first static contact, a second static contact, a movable contact, an insulating top block and an insulating top block driving mechanism;
  • the arc chamber and the insulating top block driving mechanism are all disposed in the housing, and the arc extinguishing chamber is disposed adjacent to a top end of the housing, and the insulating top block driving mechanism is disposed at a bottom end of the arc extinguishing chamber
  • the arc extinguishing chamber is disposed above the insulating top block driving mechanism, and the insulating top block driving mechanism is fixedly connected to the insulating top block and can drive the insulating top block to move up and down;
  • the first static contact head and the The second static contact heads are disposed at intervals, and the terminals of the first static contact head and the terminals of the second static contact head are exposed at the top end of the housing, and the contact of the first static contact head a contact end
  • the flexible metal piece is provided in a multi-layer metal layer structure, and the length of the metal layer layer is changed from small to large.
  • a spacing between the contact end of the movable contact head and the first static contact head is equal to a distance between the contact end of the first surface and the second static contact head .
  • the arc extinguishing chamber is surrounded by a ceramic arc extinguishing seat and a ceramic arc extinguishing cover disposed on an upper surface of the ceramic arc extinguishing seat, wherein outer surfaces of the ceramic arc extinguishing cover are respectively provided
  • the insulating top block driving mechanism includes a magnetic moving iron core, a spring sleeved on the magnetic moving iron core, a bobbin surrounding the magnetic moving iron core, and the winding a magnetic control coil disposed on the coil bobbin;
  • the coil bobbin is fixed on the ceramic arc extinguishing seat of the arc extinguishing chamber, and a through hole is disposed in an intermediate portion of the ceramic arc extinguishing seat, and one end of the magnetic moving iron core passes through
  • the through hole penetrates into the arc extinguishing chamber and is fixedly connected to the second surface of the insulating top block;
  • the other end of the magnetic moving iron core is provided with a card seat for preventing the spring from coming off the magnetic moving iron core;
  • the diameter of the through hole is larger than the diameter of the magnetic moving iron core and smaller than the diameter of the spring, and the magnetic control coil also leads out two wires respectively.
  • two fixed mounting seats are respectively disposed at two bottoms of the housing, and each of the fixed mounting seats is respectively provided with a mounting hole.
  • the mounting hole is a through hole structure or a threaded hole structure.
  • one side of the housing is provided with a junction box, and the junction box is provided with two electrodes, and the two electrodes are electrically connected to the two wires respectively.
  • the utility model has the beneficial effects that the high-voltage DC contactor provided by the invention only has a movable contact head correspondingly connected or separated from the first static contact head, and the second static contact head and the movable contact head are connected by the flexible metal piece.
  • the two-contact contactor structure of the conventional double static contact head corresponding to the double-action contact head is improved to a single-contact contactor structure, thereby eliminating the single-sided contact arc phenomenon, so that the high-voltage DC contactor interior
  • the generated arc is greatly reduced, and the temperature is lowered, so that the probability that each component inside the high-voltage DC contactor is burnt out due to excessive temperature is greatly reduced, thereby increasing the service life of the high-voltage DC contactor.
  • the number of contact heads of the high-voltage DC contactor is reduced, and the failure rate of the high-voltage DC contactor can be greatly reduced to improve the service life of the high-voltage DC contactor because of the high-voltage DC contactor. The more contacts there are, the higher the probability of failure.
  • FIG. 1 is a cross-sectional plan view showing a preferred embodiment of a high voltage DC contactor of the present invention.
  • FIG. 2 is a partial schematic view of the arc extinguishing chamber of the A-A section of FIG. 1.
  • the embodiment provides a high voltage DC contactor 1 including a housing 11, an arc extinguishing chamber 12, a first static contact 13 and a second static contact. 14.
  • the movable contact head 15, the insulating top block 16, and the insulating top block driving mechanism 17.
  • the housing 11 includes a cover-type housing 111 and a bottom cover 112 that seals the cover-type housing 111.
  • the cover-type housing 111 has a rectangular cover structure.
  • the arc extinguishing chamber 12 and the insulating top block driving mechanism 17 are all disposed in the casing 11, and the arc extinguishing chamber 12 is disposed adjacent to the top end of the shell-type outer casing 111 of the casing 11, the insulation
  • a top block driving mechanism 17 is provided at a bottom end of the arc extinguishing chamber 12.
  • the arc extinguishing chamber 12 is surrounded by a ceramic arc extinguishing seat 121 and a ceramic arc extinguishing cover 122 disposed on the upper surface of the ceramic arc extinguishing seat 12.
  • the arc extinguishing chamber 1 is vacuum-mounted and then filled for protection.
  • An inert gas such as a mixed gas such as helium, argon or neon, or other gas containing no oxygen or the like causes the arc generated in the arc extinguishing chamber 1 to be extinguished more quickly.
  • the first static contact 13 and the second static contact 14 are relatively spaced apart, and the first static contact 13 and the second static contact 14 both penetrate the ceramic arc chute 122 simultaneously.
  • the top end and the top end of the cover-type housing 111 of the housing 11 are disposed such that the terminal 131 of the first static contact 13 and the terminal 141 of the second static contact 14 are exposed to the housing 11
  • the top end of the cover-type housing 111, and the contact end 132 of the first static contact 13 and the contact end 142 of the second static contact 14 are disposed in the arc extinguishing chamber 12.
  • the insulating top block 16 is disposed in the arc extinguishing chamber 12 and is disposed at a distance from the contact end 132 of the first static contact head 13 and the contact end 142 of the second static contact head 14 .
  • the insulating top block 16 includes a first surface 161 and a second surface 162, and the first surface 161 is fixedly coupled to the movable contact 15 disposed opposite the contact end 132 of the first static contact head 13, and
  • the spacing between the movable contact 15 and the contact end 132 of the first static contact 13 is equal to the spacing between the first surface 161 and the contact end 142 of the second static contact 14 such that When the movable contact head 15 is in contact with the contact end 132 of the first static contact head 13, the first surface 161 is just in contact with the contact end 142 of the second static contact head 14 such that the The insulating top block 16 is balanced to ensure better contact between the moving contact head 15 and the contact end 132 of the first static contact head 13.
  • the movable contact 15 is also connected to the contact end 142 of the second static contact 14 via a conductor flexible metal piece 18, so that the movable contact 15 can be electrically connected to the second static contact 14 Connected.
  • the flexible metal sheet 18 is provided in a multi-layer metal layer structure, and the length of the metal layer gradually increases from small to large from the inside to the outside, thereby forming an approximate "L"-shaped arc structure, which can be the most
  • the long metal layer is on the outer ring, and may be the longest metal layer in the inner ring.
  • the structure ensures the strength of the flexible metal piece 18 while ensuring the softness of the flexible metal piece 18, so that the flexible metal piece 18 has good bending resistance and electrical conductivity.
  • the flexible metal piece 18 is disposed in a multi-layer metal layer structure, the heat dissipation area thereof is greatly increased, and the heat dissipation of the second static contact head 14 and the movable contact head 15 respectively connected thereto are facilitated.
  • the flexible metal sheet 18 is made of a copper material. In other embodiments, a good conductor material such as a copper alloy may also be used, and such structural changes still fall within the scope of the present invention.
  • the insulating top block driving mechanism 17 includes a magnetic moving iron core 171, a spring 172 sleeved on the magnetic moving iron core 171, a bobbin 173 surrounding the magnetic moving iron core 171, and the winding bobbin 173.
  • a magnetic control coil 174 is provided.
  • the coil bobbin 173 is fixed on the ceramic arc extinguishing seat 121 of the arc extinguishing chamber 12, and a through hole (not labeled) is disposed at an intermediate portion of the ceramic arc extinguishing seat 121, so that one end of the magnetic moving iron core 171
  • the arc extinguishing chamber 12 can be penetrated through the through hole, and then fixedly connected to the second surface 162 of the insulating top block 16.
  • the other end of the magnetic moving iron core 171 is provided with a card holder 1711 that prevents the spring 172 from coming off the magnetic moving iron core 171.
  • the diameter of the through hole is larger than the diameter of the magnetic moving iron core 171 and smaller than the diameter of the spring 172.
  • the magnetic control coils 174 respectively lead out two wires 1741.
  • the magnetic control coil 174 In operation, when the magnetic control coil 174 is connected to the operating current through the two wires 1741, a magnetic field is generated, and the magnetic moving iron core 171 is in the direction of the magnetic arc extinguishing chamber 12 under the action of the magnetic field. Movement, while the spring 172 is compressed under the double compression of the through hole of the card holder 1711 and the ceramic arc chute 121, and the movable contact 15 on the insulating top block 16 starts with the The first static contact heads 13 are in contact to achieve communication of the high voltage DC contactor 1. When the operating current of the magnetic control coil 174 is turned off, the magnetic field generated by the magnetic control coil 174 disappears, and under the force of the expansion and extension of the spring 172, the magnetic moving core 171 starts to move away from the ground. The direction of movement of the arc extinguishing chamber 12 is such that the movable contact 15 on the insulating top block 16 is separated from the first static contact 13 to achieve disconnection of the high voltage DC contactor 1.
  • an insulating spacer 1111 is further disposed on the top end of the cover-type housing 111 of the housing 11, and the insulating spacer 1111 is sandwiched between the first static contact 13 and the second static contact 14 Therefore, the terminal 131 of the first static contact 13 is isolated from the terminal 141 of the second static contact 14 to avoid the connection of the terminal 131 and the terminal 141 respectively. Inadvertent short circuiting, which in turn causes the high voltage DC contactor 1 to lose the on-off function of the control current.
  • Two fixed mounting seats 1112 are respectively disposed on two sides of the cover-type housing 111 of the housing 11 , and the two fixed mounting seats 1112 are disposed adjacent to the bottom cover 112 .
  • Each of the fixing mounts 1112 is provided with a mounting hole 1113.
  • the mounting hole 1113 can be a through hole structure or a threaded hole structure, so that the high voltage DC contactor 1 can be fixed by bolts or screws.
  • One side of the cover-type housing 111 of the housing 11 is further provided with a junction box 1114.
  • the junction box 1114 is provided with two electrodes (not shown), and the two electrodes are electrically connected to the two wires 1741 respectively. The working current is applied to the magnetic control coil 174 through the two electrodes.
  • the outer surface of the ceramic arc extinguishing cover 122 is further provided with two permanent magnets 19, and the two permanent magnets 19 are disposed on opposite sides of the first static contact 13 and the movable contact 15 so that When the high-voltage DC contactor 1 is in operation, when the first static contact head 13 is in contact with the movable contact head 15, the generated arc can be quickly separated from the magnetic field of the two permanent magnets 19.
  • the first static contact head 13 and the movable contact head 15 are described for the purpose of rapid arc extinguishing.
  • the high-voltage DC contactor provided in this embodiment is only provided with a movable contact head correspondingly connected or separated from the first static contact head, and the second static contact head and the movable contact head are fixedly connected by a flexible metal piece, thereby
  • the double contact contactor structure of the conventional double static contact head corresponding to the double-action contact head is improved into a single-contact contactor structure, thereby reducing the side contact arc phenomenon, so that the arc generated inside the high-voltage DC contactor is greatly reduced, and the temperature is greatly reduced.
  • the reduction is such that the probability of each component inside the high voltage DC contactor being burned out due to excessive temperature is greatly reduced, thereby increasing the service life of the high voltage DC contactor.
  • the number of contact heads of the high-voltage DC contactor is reduced, and the failure rate of the high-voltage DC contactor can be greatly reduced to improve the service life of the high-voltage DC contactor because of the high-voltage DC contactor. The more contacts there are, the higher the probability of failure.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)

Abstract

一种高压直流接触器，包括壳体（11）、灭弧室（12）、第一静接触头（13）、第二静接触头（14）、动接触头（15）、绝缘顶块（16）及绝缘顶块驱动机构（17）。灭弧室及绝缘顶块驱动机构皆设于壳体内，第一静接触头及第二静接触头相对间隔设置，且第一静接触头的接线端（131）及第二静接触头的接线端（141）皆外露于壳体的顶端，第一静接触头的接触端（132）及第二静接触头的接触端（142）皆设于灭弧室内。绝缘顶块设于灭弧室内，且同时与第一静接触头的接触端及第二静接触头的接触端相对间隔设置。绝缘顶块的第一表面（161）固定连接有与第一静接触头的接触端相对设置的动接触头，动接触头通过一柔性金属片（18）与第二静接触头的接触端电性连接。

Description

高压直流接触器 技术领域
本发明涉及电子元件领域，尤其涉及一种高压直流接触器。
 背景技术
随着社会的发展，电已经渗入了生活的方方面面。接触器作为重要的电器元件，也得到了长足的发展。一般的接触器可大致分以下两类：交流接触器和直流接触器，而直流接触器又主要以高压直流接触器为主。其实，高压直流接触器的动作原理和结构基本上与交流接触器是相同的，它们的主要区别在于高压直流接触器的主回路的电流是直流的，而交流接触器的主回路的电流是交流的。
一般的接触器通常包括外壳、设于外壳内的灭弧室、设于灭弧室内的两静接触头以及可上下移动的两动接触头，两动接触头之间采用一体化设置，通过上下移动两动接触头，使得两动接触头分别同时与与之对应的两静接触头接触或分离，以实现接触器的连通或断开。
我们知道，接触器一般用于控制较大的电流的通断，因此，当接触器从连通状态突然断开时，即在两动接触头分别与两静接触头接触分离的瞬间，会分别产生一电弧。由于电弧的瞬间温度可达到上千摄氏度以上，很容易会对接触器内部各零件造成损害，如把灭弧室的内壁烧坏，甚至把静接触头或动接触头烧坏等，从而影响到接触器的使用寿命。
由于交流接触器控制的是交流电的通断，我们知道，交流电的大小和方向会随时间作出周期性的变化，即交流电的某一刻的瞬时值电流值可以为零，因此，交流接触器可通过将其断开瞬间控制在交流电的瞬时值电流值为零的时刻来避免其内部产生电弧现象。而高压直流接触器控制的是高压直流电的通断，也就是说，高压直流接触器并不能采用上述方法来避免其内部产生电弧现象，因此，如何在高压直流接触器中减少电弧的影响，延长高压直流接触器的使用寿命，已成为业内亟需解决的难题。
 技术问题
本发明的目的在于克服现有技术之缺陷，提供了一种结构简单、少电弧、使用寿命长的高压直流接触器。
技术解决方案
本发明的技术方案是这样实现的：
一种高压直流接触器，所述高压直流接触器包括壳体、灭弧室、第一静接触头、第二静接触头、动接触头、绝缘顶块及绝缘顶块驱动机构；所述灭弧室及所述绝缘顶块驱动机构皆设于所述壳体内，且所述灭弧室邻近所述壳体的顶端设置，所述绝缘顶块驱动机构设于所述灭弧室的底端，所述灭弧室设置于绝缘顶块驱动机构的上方，所述绝缘顶块驱动机构与绝缘顶块固定连接并可驱动所述绝缘顶块上下运动；所述第一静接触头及所述第二静接触头相对间隔设置，且所述第一静接触头的接线端及所述第二静接触头的接线端皆外露于所述壳体的顶端，所述第一静接触头的接触端及所述第二静接触头的接触端皆设于所述灭弧室内；所述绝缘顶块设于所述灭弧室内，且同时与所述第一静接触头的接触端及所述第二静接触头的接触端相对间隔设置；所述绝缘顶块包括第一表面及第二表面，所述第一表面固定连接有与所述第一静接触头的接触端相对设置的所述动接触头，所述动接触头还通过一柔性金属片与所述第二静接触头的接触端电性连接；所述绝缘顶块驱动机构驱动所述绝缘顶块上下运动使所述绝缘顶块上的动接触头与第一静接触头接触或者断开。
作为上述高压直流接触器的改进，所述柔性金属片为多层金属层结构设置，所述金属层层长度逐层由小变大。
作为上述高压直流接触器的改进，所述动接触头与所述第一静接触头的接触端之间的间距等于所述第一表面与所述第二静接触头的接触端之间的间距。
作为上述高压直流接触器的改进，所述灭弧室由陶瓷灭弧座及设于所述陶瓷灭弧座上表面的陶瓷灭弧罩包围而成，所述陶瓷灭弧罩的外侧表面分别设有两永磁铁，且所述两永磁铁对应设于所述第一静接触头及所述动接触头的两侧。
作为上述高压直流接触器的改进，所述绝缘顶块驱动机构包括磁力动铁芯、套设于所述磁力动铁芯上的弹簧、包围所述磁力动铁芯设置的线圈骨架以及缠绕所述线圈骨架设置的磁力控制线圈；所述线圈骨架固定于所述灭弧室的陶瓷灭弧座上，且所述陶瓷灭弧座的中间部位设置一通孔，所述磁力动铁芯的一端通过所述通孔穿入所述灭弧室固定连接在所述绝缘顶块的第二表面上；所述磁力动铁芯的另一端设有防止所述弹簧脱离所述磁力动铁芯的卡座；所述通孔的直径大于所述磁力动铁芯的直径，且小于所述弹簧的直径，所述磁力控制线圈还分别引出两导线。
作为上述高压直流接触器的改进，所述壳体的两侧底部分别设有两固定安装座，每一所述固定安装座分别设有一安装孔。
作为上述高压直流接触器的改进，所述安装孔为通孔结构或螺纹孔结构。
作为上述高压直流接触器的改进，所述壳体的一侧设有接线盒，所述接线盒设置两电极，所述两电极分别与所述两导线电性连接。
 有益效果
本发明的有益效果是：本发明提供的高压直流接触器，只设置了一动接触头与第一静接触头进行对应相接或分离，且通过柔性金属片将第二静接触头与动接触头固定连接起来，从而将传统的双静接触头对应双动接触头的双接触式接触器结构改进为单接触式接触器结构，进而杜绝了单边接触电弧现象，使得所述高压直流接触器内部产生的电弧大大减少，温度降低，使得所述高压直流接触器内部的各元件由于温度过高而被烧坏的概率大大降低，从而提高所述高压直流接触器的使用寿命。另外，所述高压直流接触器的接触头的数目减少了，亦可大大降低所述高压直流接触器的故障率，以提高所述高压直流接触器的使用寿命，这是因为高压直流接触器的接触头越多，出现故障的概率就越高。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，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为本发明高压直流接触器一种较佳实施例的剖视平面结构示意图。
图2为图1的A-A剖面灭弧室局部示意图。
 本发明的最佳实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
如图1和图2所示，本实施例提供一种高压直流接触器1，所述高压直流接触器1包括壳体11、灭弧室12、第一静接触头13、第二静接触头14、动接触头15、绝缘顶块16及绝缘顶块驱动机构17。
具体地，所述壳体11包括罩体式外壳111及密封所述罩体式外壳111的底盖112，所述罩体式外壳111为矩形罩体结构。所述灭弧室12及所述绝缘顶块驱动机构17皆设于所述壳体11内，且所述灭弧室12邻近所述壳体11的罩体式外壳111的顶端设置，所述绝缘顶块驱动机构17设于所述灭弧室12的底端。所述灭弧室12由陶瓷灭弧座121及设于所述陶瓷灭弧座12上表面的陶瓷灭弧罩122包围而成，所述灭弧室1内真空设置，再填充有用于保护的惰性气体，比如氖、氩、氪等混合气体，或者不含氧气的其它气体等，使得所述灭弧室1内产生的电弧可更快的熄灭。
所述第一静接触头13及所述第二静接触头14相对间隔设置，且所述第一静接触头13及所述第二静接触头14皆同时贯穿所述陶瓷灭弧罩122的顶端及所述壳体11的罩体式外壳111的顶端设置，使得所述第一静接触头13的接线端131及所述第二静接触头14的接线端141皆外露于所述壳体11的罩体式外壳111的顶端，而所述第一静接触头13的接触端132及所述第二静接触头14的接触端142皆设于所述灭弧室12内。所述绝缘顶块16设于所述灭弧室12内，且同时与所述第一静接触头13的接触端132及所述第二静接触头14的接触端142相对间隔设置。所述绝缘顶块16包括第一表面161及第二表面162，所述第一表面161固定连接有与所述第一静接触头13的接触端132相对设置的所述动接触头15，且所述动接触头15与所述第一静接触头13的接触端132之间的间距等于所述第一表面161与所述第二静接触头14的接触端142之间的间距，使得当所述动接触头15与所述第一静接触头13的接触端132相接触时，所述第一表面161刚好与所述第二静接触头14的接触端142相接触，以使得所述绝缘顶块16保持平衡，确保所述动接触头15与所述第一静接触头13的接触端132之间可以更好地进行相接触。
另外，所述动接触头15还通过一导体柔性金属片18与所述第二静接触头14的接触端142连接，使得所述动接触头15可与所述第二静接触头14电性连通。所述柔性金属片18为多层金属层结构设置，所述金属层层长度从内向外逐渐逐层由小变大，从而形成近似“L”形弧形结构，该弧形结构既可以是最长金属层在外圈，又可以是最长金属层在里圈，该结构既保证所述柔性金属片18的强度同时，又保证了所述柔性金属片18的柔软度，使得所述柔性金属片18具备良好的耐折弯性和导电性，即使经过往复弯曲，依旧不折断、不变形，即不易损坏，使用寿命长。另外，由于所述柔性金属片18为多层金属层结构设置，大大增大了其散热面积，有助于与之分别连接的所述第二静接触头14及所述动接触头15的散热。在本实施例中，所述柔性金属片18为铜质材料制成的。在其它实施例中，也可以采用铜合金等良导体材料制成，这样的结构变化，依旧落入本发明的保护范围之内。
所述绝缘顶块驱动机构17包括磁力动铁芯171、套设于所述磁力动铁芯171上的弹簧172、包围所述磁力动铁芯171设置的线圈骨架173以及缠绕所述线圈骨架173设置的磁力控制线圈174。所述线圈骨架173固定于所述灭弧室12的陶瓷灭弧座121上，且所述陶瓷灭弧座121的中间部位设置一通孔（未标示），使得所述磁力动铁芯171的一端可通过所述通孔穿入所述灭弧室12，进而固定连接在所述绝缘顶块16的第二表面162上。所述磁力动铁芯171的另一端设有防止所述弹簧172脱离所述磁力动铁芯171的卡座1711。所述通孔的直径大于所述磁力动铁芯171的直径，且小于所述弹簧172的直径。所述磁力控制线圈174分别引出两导线1741。
工作时，当所述磁力控制线圈174经所述两导线1741接入工作电流后，会产生一磁场，所述磁力动铁芯171在该磁场的作用下往靠近所述灭弧室12的方向运动，同时所述弹簧172在所述卡座1711及所述陶瓷灭弧座121的通孔的双重挤压下压缩，而所述绝缘顶块16上的所述动接触头15开始与所述第一静接触头13相接触，从而实现所述高压直流接触器1的连通。当所述磁力控制线圈174接入的工作电流断开后，所述磁力控制线圈174产生的磁场消失，在所述弹簧172膨胀伸展的作用力下，所述磁力动铁芯171开始往远离所述灭弧室12的方向运动，使得所述绝缘顶块16上的所述动接触头15与所述第一静接触头13分离，从而实现所述高压直流接触器1的断开。
另外，所述壳体11的罩体式外壳111的顶端还设置一绝缘隔离板1111，且所述绝缘隔离板1111夹设于所述第一静接触头13及所述第二静接触头14之间，使得所述第一静接触头13的接线端131与所述第二静接触头14的接线端141隔离开来，以避免分别接入所述接线端131及所述接线端141的接线不小心短接，进而导致所述高压直流接触器1失去控制电流的通断功能。所述壳体11的罩体式外壳111的两侧还分别设有两固定安装座1112，且所述两固定安装座1112邻近所述底盖112设置。每一所述固定安装座1112设有一安装孔1113，所述安装孔1113可为通孔结构或螺纹孔结构，使得所述高压直流接触器1可通过螺栓或螺丝进行安装固定。所述壳体11的罩体式外壳111的一侧还设有接线盒1114，所述接线盒1114设置两电极（未图示），所述两电极分别与所述两导线1741电性连接，以通过所述两电极为所述磁力控制线圈174接入工作电流。所述陶瓷灭弧罩122的外侧表面还分别设有两永磁铁19，且所述两永磁铁19对应设于所述第一静接触头13及所述动接触头15的两侧，这样，所述高压直流接触器1工作时，当所述第一静接触头13与所述动接触头15接触分离的瞬间，产生的电弧可在所述两永磁铁19的磁场作用下迅速引离所述第一静接触头13及所述动接触头15，以达到迅速灭弧的目的。
本实施例提供的高压直流接触器，只设置了一动接触头与第一静接触头进行对应相接或分离，且通过柔性金属片将第二静接触头与动接触头固定连接起来，从而将传统的双静接触头对应双动接触头的双接触式接触器结构改进为单接触式接触器结构，进而减少了一边接触电弧现象，使得所述高压直流接触器内部产生的电弧大大减少，温度降低，使得所述高压直流接触器内部的各元件由于温度过高而被烧坏的概率大大降低，从而提高所述高压直流接触器的使用寿命。另外，所述高压直流接触器的接触头的数目减少了，亦可大大降低所述高压直流接触器的故障率，以提高所述高压直流接触器的使用寿命，这是因为高压直流接触器的接触头越多，出现故障的概率就越高。
以上所述仅为本发明的较佳实施例而已，并不用以限制本发明，凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。

Claims (10)

  1. 一种高压直流接触器，其特征在于，所述高压直流接触器包括壳体、灭弧室、第一静接触头、第二静接触头、动接触头、绝缘顶块及绝缘顶块驱动机构；所述灭弧室及所述绝缘顶块驱动机构皆设于所述壳体内，所述绝缘顶块驱动机构设于所述灭弧室的底端，所述灭弧室设置于绝缘顶块驱动机构的上方，所述绝缘顶块驱动机构与绝缘顶块固定连接并可驱动所述绝缘顶块上下运动；所述第一静接触头及所述第二静接触头相对间隔设置，且所述第一静接触头的接线端及所述第二静接触头的接线端皆外露于所述壳体的顶端，所述第一静接触头的接触端及所述第二静接触头的接触端皆设于所述灭弧室内；所述绝缘顶块设于所述灭弧室内，且同时与所述第一静接触头的接触端及所述第二静接触头的接触端相对间隔设置；所述绝缘顶块包括第一表面及第二表面，所述第一表面固定连接有与所述第一静接触头的接触端相对设置的所述动接触头，所述动接触头还通过一柔性金属片与所述第二静接触头的接触端电性连接，所述绝缘顶块驱动机构驱动所述绝缘顶块上下运动使所述绝缘顶块上的动接触头与第一静接触头接触或者断开。
  2. 如权利要求1所述的高压直流接触器，其特征在于，所述导体柔性金属片为多层金属层结构设置，所述金属层层长度逐层由小变大。
  3. 如权利要求1所述的高压直流接触器，其特征在于，所述动接触头与所述第一静接触头的接触端之间的间距等于所述第一表面与所述第二静接触头的接触端之间的间距。
  4. 如权利要求1所述的高压直流接触器，其特征在于，所述灭弧室由陶瓷灭弧座及设于所述陶瓷灭弧座上表面的陶瓷灭弧罩包围而成，所述陶瓷灭弧罩的外侧表面分别设有两永磁铁，且所述两永磁铁对应设于所述第一静接触头及所述动接触头的两侧。
  5. 如权利要求4所述的高压直流接触器，其特征在于，所述绝缘顶块驱动机构包括磁力动铁芯、套设于所述磁力动铁芯上的弹簧、包围所述磁力动铁芯设置的线圈骨架以及缠绕所述线圈骨架设置的磁力控制线圈；所述线圈骨架固定于所述灭弧室的陶瓷灭弧座上，且所述陶瓷灭弧座的中间部位设置一通孔，所述磁力动铁芯的一端通过所述通孔穿入所述灭弧室固定连接在所述绝缘顶块的第二表面上；所述磁力动铁芯的另一端设有防止所述弹簧脱离所述磁力动铁芯的卡座；所述通孔的直径大于所述磁力动铁芯的直径，且小于所述弹簧的直径，所述磁力控制线圈还分别引出两导线。
  6. 如权利要求1所述的高压直流接触器，其特征在于，所述壳体的两侧的底部分别设有两固定安装座，每一所述固定安装座分别设有一安装孔。
  7. 如权利要求6所述的高压直流接触器，其特征在于，所述安装孔为通孔结构或螺纹孔结构。
  8. 如权利要求1所述的高压直流接触器，其特征在于，所述壳体的一侧设有接线盒，所述接线盒设置两电极，所述两电极分别与所述两导线电性连接。
  9. 如权利要求1所述的高压直流接触器，其特征在于，在所述壳体的顶端第一静接触头接线端和第二静接触头接线端之间设置有绝缘隔离板。
  10. 如如权利要求1所述的高压直流接触器，其特征在于，所述灭弧室内为真空环境，或者在灭弧室抽成真空后再充入不含氧气的气体或混合气体。
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