CN104681371A - Variable rotating shaft contact structure for direct current circuit breaker - Google Patents
Variable rotating shaft contact structure for direct current circuit breaker Download PDFInfo
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- CN104681371A CN104681371A CN201510053626.3A CN201510053626A CN104681371A CN 104681371 A CN104681371 A CN 104681371A CN 201510053626 A CN201510053626 A CN 201510053626A CN 104681371 A CN104681371 A CN 104681371A
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- push rod
- contact
- spring
- circuit breaker
- rotating shaft
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 33
- 229910052802 copper Inorganic materials 0.000 claims abstract description 30
- 239000010949 copper Substances 0.000 claims abstract description 30
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims abstract description 23
- 229910052709 silver Inorganic materials 0.000 claims abstract description 23
- 239000004332 silver Substances 0.000 claims abstract description 23
- 239000002184 metal Substances 0.000 claims abstract description 21
- 229910052751 metal Inorganic materials 0.000 claims abstract description 21
- 238000009413 insulation Methods 0.000 claims description 5
- 239000011889 copper foil Substances 0.000 claims description 3
- 239000011810 insulating material Substances 0.000 claims description 2
- 230000008878 coupling Effects 0.000 claims 1
- 238000010168 coupling process Methods 0.000 claims 1
- 238000005859 coupling reaction Methods 0.000 claims 1
- 230000003068 static effect Effects 0.000 abstract description 18
- 238000000034 method Methods 0.000 description 9
- 230000008569 process Effects 0.000 description 8
- 230000009471 action Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 230000003139 buffering effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005520 electrodynamics Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000009916 joint effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
Classifications
-
- 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
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- Breakers (AREA)
Abstract
本发明提供了一种直流断路器变转轴触头结构，包括动触头、静触头出线铜排、下出线铜排和推杆组合，动触头上设有动触头银点，静触头出线铜排上设有相对应的静触头银点；动触头的中部设置中部轴销，中部轴销通过分闸弹簧与第一弹簧安装座连接；动触头的下部设置下部轴销，下出线铜排上安装第二弹簧安装座，下部轴销与第二弹簧安装座通过触头压力弹簧连接；动触头的下方还设有腰形孔，腰形孔中设有轴销；推杆组合包括金属推杆、绝缘推杆和金属拨叉推杆，金属推杆上设有推杆转轴，绝缘推杆上设有相应的轴孔，可绕推杆转轴上下转动。本发明所述的触头结构具有较好的良好的电动斥力补偿，提高断路器的短时耐受能力，且可快速脱扣提高分闸速度。
The invention provides a DC circuit breaker variable shaft contact structure, including a moving contact, a static contact outlet copper bar, a lower outlet copper bar and a combination of push rods. There is a corresponding silver point of the static contact on the copper bar of the head outlet; the middle shaft pin is set in the middle of the moving contact, and the middle shaft pin is connected with the first spring mounting seat through the opening spring; the lower shaft pin is set in the lower part of the moving contact , the second spring mounting seat is installed on the lower outlet copper bar, and the lower shaft pin is connected to the second spring mounting seat through the contact pressure spring; there is also a waist-shaped hole under the moving contact, and a shaft pin is arranged in the waist-shaped hole; The push rod combination includes a metal push rod, an insulated push rod and a metal shift fork push rod. The metal push rod is provided with a push rod rotating shaft, and the insulating push rod is provided with a corresponding shaft hole, which can rotate up and down around the push rod rotating shaft. The contact structure of the present invention has better electric repulsion compensation, improves the short-term withstand capacity of the circuit breaker, and can quickly trip to increase the opening speed.
Description
技术领域technical field
本发明属于直流断路器技术领域，涉及一种直流断路器变转轴触头结构，具体是一种既可实现电动斥力补偿又可快速脱扣的断路器触头系统结构。The invention belongs to the technical field of DC circuit breakers, and relates to a contact structure of a variable shaft of a DC circuit breaker, in particular to a circuit breaker contact system structure capable of realizing electric repulsion compensation and quick tripping.
背景技术Background technique
随着轨道交通、新能源和直流配网技术的发展，直流供电系统应用越来越广泛，其中，作为直流供电系统的关键设备，大容量直流断路器为了提高断路器的短时耐受能力和短路开断能力，需增加断路器触头间的触头压力，并需提高断路器分闸速度，则断路器合闸功率大幅增加，导致对材料的性能要求大大提高，结构越来越复杂，进而影响大电流开断设备的整体开发、应用。With the development of rail transit, new energy and DC distribution network technology, the application of DC power supply system is more and more widely. The short-circuit breaking capacity needs to increase the contact pressure between the contacts of the circuit breaker, and the opening speed of the circuit breaker needs to be increased, so the closing power of the circuit breaker will increase greatly, resulting in a greatly improved performance requirement for the material, and the structure will become more and more complex. And then affect the overall development and application of high current breaking equipment.
发明内容Contents of the invention
针对中压直流断路器短时耐受和短路开断能力问题，本发明设计一种基于电动力补偿原理的变转轴动触头系统结构，其目的在于显著地提高断路器的短时耐受能力，可快速脱扣提高分闸速度的断路器触头系统结构。Aiming at the problems of short-term withstand and short-circuit breaking capacity of medium-voltage DC circuit breakers, the present invention designs a structure of a variable-rotation shaft moving contact system based on the principle of electrodynamic compensation, and its purpose is to significantly improve the short-term withstand capacity of the circuit breaker , The structure of the circuit breaker contact system that can quickly trip and increase the opening speed.
同时，利用断路器触头系统弹簧结构的独特设计，使得整个触头系统能够在分闸过程初期获得高的分闸速度，满足了较高的电气特性要求，简化了结构设计，提高了设备运行可靠性。At the same time, using the unique design of the spring structure of the circuit breaker contact system, the entire contact system can obtain a high opening speed in the early stage of the opening process, which meets the higher requirements for electrical characteristics, simplifies the structural design, and improves the operation of the equipment. reliability.
本发明是通过以下技术手段实现上述技术目的的。The present invention achieves the above-mentioned technical purpose through the following technical means.
一种直流断路器变转轴触头结构，包括动触头、静触头出线铜排、第一弹簧安装座、下出线铜排、轴销和推杆组合，所述动触头上部固定设有动触头银点，所述静触头出线铜排上固定设有与所述动触头银点相对应的静触头银点；所述动触头的中部设置有中部轴销，所述中部轴销通过分闸弹簧与所述第一弹簧安装座连接；所述动触头的下部设置有下部轴销，所述下出线铜排上固定安装有第二弹簧安装座，所述下部轴销与所述第二弹簧安装座通过触头压力弹簧连接；所述动触头的下方还设有腰形孔，所述轴销置于所述腰形孔中；所述推杆组合包括金属推杆、绝缘推杆和金属拨叉推杆，所述金属推杆上设有推杆转轴，所述绝缘推杆上设有与推杆转轴相对应的轴孔，且所述绝缘推杆可绕推杆转轴上下转动。A DC circuit breaker variable shaft contact structure, including a moving contact, a static contact outgoing copper bar, a first spring mounting seat, a lower outgoing copper bar, a shaft pin and a combination of a push rod, and the upper part of the moving contact is fixed. The silver point of the moving contact, the silver point of the static contact corresponding to the silver point of the moving contact is fixed on the outlet copper bar of the static contact; the middle part of the moving contact is provided with a middle pivot pin, and the The middle shaft pin is connected to the first spring mounting seat through the opening spring; the lower shaft pin is arranged on the lower part of the moving contact, and the second spring mounting seat is fixedly installed on the lower outlet copper bar. The pin is connected to the second spring mounting seat through a contact pressure spring; a waist-shaped hole is also provided under the moving contact, and the shaft pin is placed in the waist-shaped hole; the push rod assembly includes a metal A push rod, an insulating push rod and a metal fork push rod, the metal push rod is provided with a push rod shaft, the insulating push rod is provided with a shaft hole corresponding to the push rod shaft, and the insulating push rod can Rotate up and down around the push rod shaft.
进一步的，所述金属推杆末端与绝缘推杆之间设有竖直放置的推杆复位弹簧。Further, a vertically placed push rod return spring is provided between the end of the metal push rod and the insulating push rod.
进一步的，所述下出线铜排的下方固定连接柔性连接装置，所述柔性连接装置的另一端固定在所述动触头的下端。Further, a flexible connection device is fixedly connected to the bottom of the lower outlet copper bar, and the other end of the flexible connection device is fixed to the lower end of the moving contact.
进一步的，所述分闸弹簧和触头压力弹簧位于动触头的同侧。Further, the opening spring and the contact pressure spring are located on the same side of the moving contact.
进一步的，所述分闸弹簧属于压缩弹簧。Further, the opening spring is a compression spring.
进一步的，所述触头压力弹簧属于压缩弹簧。Further, the contact pressure spring is a compression spring.
进一步的，所述柔性连接装置为铜箔式或铜编织带式软连接。Further, the flexible connection device is a copper foil or copper braid type flexible connection.
进一步的，所述静触头出线铜排、第一弹簧安装座、下出线铜排均固定在断路器的壳架上，轴销位置固定，不可移动。Further, the outgoing copper bar of the static contact, the first spring mounting seat, and the lower outgoing copper bar are all fixed on the frame of the circuit breaker, and the position of the pivot pin is fixed and cannot be moved.
进一步的，所述第一弹簧安装座、第二弹簧安装座均为绝缘材料。Further, both the first spring mounting seat and the second spring mounting seat are insulating materials.
本发明的有益效果是：The beneficial effects of the present invention are:
(1)本发明通过推杆组合、分闸弹簧、触头压力弹簧等部件施力位置的合理设置，充分利用动触头运动过程中转轴的动态变化，使触头系统在合闸状态下具有良好的电动斥力补偿，保证触头间在短路电流通过时仍能保持一定的接触压力，提高断路器的短时耐受能力。同时，整个装置能够在分闸时获得高的分闸速度，简化了机械结构，从而提高直流断路器的开断性能和可靠性。(1) The present invention makes full use of the dynamic change of the rotating shaft during the movement of the moving contact through the reasonable setting of the force application positions of the push rod combination, the opening spring, the contact pressure spring, etc., so that the contact system has Good electric repulsion compensation ensures that a certain contact pressure can still be maintained between the contacts when the short-circuit current passes, and improves the short-term withstand capacity of the circuit breaker. At the same time, the whole device can obtain a high opening speed when opening, which simplifies the mechanical structure, thereby improving the breaking performance and reliability of the DC circuit breaker.
(2)在触头闭合时能利用触头压力弹簧等进行缓冲，减小弹跳，在触头分闸时利用触头弹簧力使动触头获得一定的初始的动能，拉断熔焊点，提高初始分闸速度，减小燃弧时间，从而提高介质恢复的速度；推杆组合可在动力装置驱动下自动进行旋转与恢复的状态变化，以促进断路器的合闸、分闸动作的顺利进行。(2) When the contact is closed, the contact pressure spring can be used for buffering to reduce the bouncing. When the contact is opened, the contact spring force can be used to make the moving contact obtain a certain initial kinetic energy, and the melting point will be broken. Increase the initial opening speed and reduce the arcing time, thereby increasing the speed of medium recovery; the push rod combination can automatically perform the state change of rotation and recovery under the drive of the power device, so as to promote the smooth closing and opening of the circuit breaker conduct.
附图说明Description of drawings
下面结合附图对本发明作进一步说明。The present invention will be further described below in conjunction with accompanying drawing.
图1是本发明实施例的合闸初始过程状态结构示意图。Fig. 1 is a schematic diagram of the state structure of the initial closing process of the embodiment of the present invention.
图2是本发明实施例的合闸末端转动轴变化状态结构示意图。Fig. 2 is a schematic structural diagram of the changing state of the rotating shaft at the closing end according to the embodiment of the present invention.
图3是本发明实施例的合闸状态结构示意图。Fig. 3 is a schematic structural diagram of the closed state of the embodiment of the present invention.
图4是本发明实施例的快速脱扣分闸状态结构示意图。Fig. 4 is a schematic diagram of the structure of the fast trip and opening state of the embodiment of the present invention.
图5为本发明推杆组合结构示意图。Fig. 5 is a schematic diagram of the combined structure of the push rod of the present invention.
附图标记说明如下：The reference signs are explained as follows:
1-动触头；2-金属拨叉推杆；3-绝缘推杆；4-中部轴销；5-下部轴销；6-轴销；7-腰形孔；8-柔性连接装置；9-下出线铜排；10-第二弹簧安装座；11-触头压力弹簧；12-第一弹簧安装座；13-分闸弹簧；14-静触头出线铜排；15-静触头银点；16-动触头银点；17-推杆转轴；18-金属推杆；19-推杆复位弹簧。1-moving contact; 2-metal shift fork push rod; 3-insulation push rod; 4-middle shaft pin; 5-lower shaft pin; 6-shaft pin; 7-waist hole; 8-flexible connection device; 9 -Bottom outlet copper bar; 10-Second spring mounting seat; 11-Contact pressure spring; 12-First spring mounting seat; 13-Opening spring; 14-Static contact outlet copper bar; 15-Static contact silver point; 16-moving contact silver point; 17-push rod shaft; 18-metal push rod; 19-push rod reset spring.
具体实施方式Detailed ways
下面结合附图以及具体实施例对本发明作进一步的说明，需要指出的是，下面仅以一种最优化的技术方案对本发明的技术方案以及设计原理进行详细阐述，但本发明的保护范围并不限于此。The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. It should be pointed out that the technical solution and design principles of the present invention will be described in detail below only with an optimized technical solution, but the protection scope of the present invention does not limited to this.
如图1所示，一种直流断路器变转轴触头结构，包括可活动的动触头1、固定设置在断路器的壳架上的静触头出线铜排14和下出线铜排9；所述动触头1下端通过由铜箔式或铜编织带式软连接组成的柔性连接装置8与下出线铜排9相连，使结构更加合理，安全可靠，形成柔性驱动，提高工作效率和质量。As shown in Figure 1, a DC circuit breaker variable shaft contact structure includes a movable movable contact 1, a static contact outlet copper bar 14 and a lower outlet copper bar 9 fixedly arranged on the frame of the circuit breaker; The lower end of the moving contact 1 is connected to the lower outlet copper bar 9 through a flexible connection device 8 composed of copper foil or copper braided flexible connection, which makes the structure more reasonable, safe and reliable, forms a flexible drive, and improves work efficiency and quality .
所述动触头1上部前侧设置有与静触头出线铜排14上的静触头银点15配合的动触头银点16；所述动触头1中部的前方设有第一弹簧安装座12，所述第一弹簧安装座12与动触头1之间通过分闸弹簧13连接，分闸弹簧13为压缩弹簧，动触头1的中部设置有一个中部轴销4，动触头1通过中部轴销4与分闸弹簧13相配合；所述动触头1下部的前方设有第二弹簧安装座10，所述第二弹簧安装座10与动触头1之间通过触头压力弹簧11连接，触头压力弹簧11为压缩弹簧，动触头1的下部设置有一个下部轴销5，动触头1通过下部轴销5与触头压力弹簧11相配合。所述分闸弹簧13安装于第一弹簧安装座12内，第一弹簧安装座12固定在断路器的壳架上。所述动触头1的中部设置有一个中部轴销4，分闸弹簧13通过中部轴销4对动触头1形成向后作用力。所述触头压力弹簧11安装于第二弹簧安装座10上，第二弹簧安装座10固定在下出线铜排9上。所述动触头1的下部设置有一个下部轴销5，触头压力弹簧11通过下部轴销5形成对动触头1向后的作用力。动触头1的下部还开有一个前后方向的腰形孔7，并通过该腰形孔7与一个固定的轴销6配合，使动触头1的下部能够在腰形孔7的限位下前、后移动以及转动。The front side of the upper part of the moving contact 1 is provided with a moving contact silver point 16 that cooperates with the static contact silver point 15 on the static contact outlet copper bar 14; the front of the middle part of the moving contact 1 is provided with a first spring The mounting seat 12, the first spring mounting seat 12 is connected with the moving contact 1 through the opening spring 13, the opening spring 13 is a compression spring, the middle of the moving contact 1 is provided with a middle shaft pin 4, and the moving contact The head 1 cooperates with the opening spring 13 through the middle shaft pin 4; the front of the lower part of the moving contact 1 is provided with a second spring mounting seat 10, and the second spring mounting seat 10 and the moving contact 1 are connected by a contact The head pressure spring 11 is connected, the contact pressure spring 11 is a compression spring, the bottom of the movable contact 1 is provided with a lower pivot pin 5, and the movable contact 1 cooperates with the contact pressure spring 11 through the lower pivot pin 5. The opening spring 13 is installed in the first spring mounting seat 12, and the first spring mounting seat 12 is fixed on the frame of the circuit breaker. The middle part of the movable contact 1 is provided with a middle pivot pin 4 , and the opening spring 13 forms a backward force on the movable contact 1 through the middle pivot pin 4 . The contact pressure spring 11 is installed on the second spring mounting seat 10 , and the second spring mounting seat 10 is fixed on the lower outlet copper bar 9 . The lower part of the moving contact 1 is provided with a lower shaft pin 5 , and the contact pressure spring 11 forms a backward force on the moving contact 1 through the lower shaft pin 5 . The lower part of the moving contact 1 also has a waist-shaped hole 7 in the front and rear direction, and cooperates with a fixed shaft pin 6 through the waist-shaped hole 7, so that the lower part of the moving contact 1 can be limited by the waist-shaped hole 7. Move forward and backward and turn.
如图5所示，所述动触头1中部后侧设置有能够对动触头1施加向前作用力的推杆组合，推杆组合包括绝缘推杆3、金属拨叉推杆2和金属推杆18，推杆组合由动力装置驱动；所述金属推杆18上设有推杆转轴17，所述绝缘推杆3上设有相应轴孔，可绕推杆转轴17上下转动。金属推杆18末端设有推杆复位弹簧19，推动绝缘推杆3有向上运动的趋势，使得推杆组合在力F2的作用下可绕推杆转轴17向下旋转，力F2消失后，推杆组合在复位弹簧19的作用下，绝缘推杆组合可恢复水平状态。所述的推杆组合与中部轴销4碰撞接触，可在动力装置操作力作用下对动触头1形成向前作用力。As shown in Figure 5, the rear side of the middle part of the movable contact 1 is provided with a push rod combination capable of applying forward force to the movable contact 1. The push rod combination includes an insulating push rod 3, a metal shift fork push rod 2 and a metal fork push rod. The push rod 18, the push rod combination is driven by the power unit; the metal push rod 18 is provided with a push rod shaft 17, and the insulating push rod 3 is provided with a corresponding shaft hole, which can rotate up and down around the push rod shaft 17. The end of the metal push rod 18 is provided with a push rod return spring 19, which pushes the insulating push rod 3 to move upwards, so that the push rod combination can rotate downward around the push rod shaft 17 under the action of the force F2. After the force F2 disappears, the push rod The rod combination is under the action of the back-moving spring 19, and the insulating push rod combination can return to a horizontal state. The push rod combination collides with the pivot pin 4 in the middle to form a forward force on the moving contact 1 under the action of the operating force of the power unit.
本发明所述结构的工作原理为：The operating principle of the structure of the present invention is:
如图1所示，在合闸初始过程中，动力装置驱动推杆组合，推杆组合对动触头1中部施加向前的作用力，同时，触头压力弹簧11通过下部轴销5施加作用力于动触头1下部，使腰形孔7的前侧紧贴于轴销6上，形成以轴销6为支点轴的转动轴，在向前的作用力下动触头1以轴销6为转动轴作顺时针转动，直至动触头银点16的上部与静触头银点15接触，如图2所示初始状态。As shown in Figure 1, in the initial process of closing, the power device drives the push rod combination, and the push rod combination exerts a forward force on the middle part of the moving contact 1, and at the same time, the contact pressure spring 11 acts through the lower shaft pin 5 Force on the lower part of the moving contact 1, so that the front side of the waist-shaped hole 7 is close to the shaft pin 6, forming a rotating shaft with the shaft pin 6 as the fulcrum axis, and the moving contact 1 is driven by the shaft pin under the forward force. 6 is that the rotating shaft rotates clockwise until the upper part of the silver dot 16 of the moving contact contacts with the silver dot 15 of the static contact, as shown in the initial state in FIG. 2 .
如图2所示，在合闸末端过程中，动触头银点16上部与静触头银点15接触，动力装置驱动推杆组合继续向前运动，此时形成以动触头银点16和静触头银点15的接触处为支点的转动点，动触头1以此转动点作逆时针转动，腰形孔7在轴销6的限位下向前移动，并压缩触头压力弹簧11，超程到位后完成合闸过程，如图3所示状态。As shown in Figure 2, during the closing process, the upper part of the moving contact silver point 16 is in contact with the static contact silver point 15, and the power device drives the push rod combination to continue to move forward, forming a moving contact silver point 16 at this time. The point of contact with the silver point 15 of the static contact is the turning point of the fulcrum. The moving contact 1 rotates counterclockwise at this turning point. The waist-shaped hole 7 moves forward under the limit of the shaft pin 6 and compresses the contact pressure. The spring 11 completes the closing process after the overtravel is in place, as shown in Fig. 3 .
如图3所示，合闸状态下，在动触头1的中部轴销4处形成固定支点，这时动触头1在触头压力弹簧11的作用下具有绕中部轴销4作顺时针旋转的趋势，使动触头银点16与静触头银点15接触压紧，并形成触头压力；在断路器通过大的短路大电流时，动触头银点16和静银触点15之间将产生非常大的电动斥力F1，同时短路电流流过动触头1，产生电动斥力F3，电动斥力F1和F3的合力使动触头1有绕着中部轴销4逆时针旋转的趋势，触头压力弹簧11则阻挡这种旋转趋势，补偿电动斥力对动静触点间接触压力的影响，使动触头银点16和静银触点15处保持足够的触头压力，防止动触头1被斥开。本结构的显著特点在于：电动斥力F3分布在中部轴销4的上下两侧，绝大部分互相抵消，使得触头压力弹簧11需克服的斥力大为减小，从而大幅提高断路器触头抗短时耐受电流的能力。同时当短路分闸时，在中部轴销4处形成的支点撤除，所有分闸弹簧13、触头压力弹簧11、电动斥力F1和F3都将推动动触头1向后撤退(绕轴销6逆时针旋转)，最大限度提高分闸速度，有利于提高断路器开断能力。因此本发明显著提高了直流断路器的短时耐受能力和分闸速度，特别适合用于短时耐受能力和开断能力要求高的直流断路器。As shown in Figure 3, in the closed state, a fixed fulcrum is formed at the middle shaft pin 4 of the moving contact 1, and at this time, the moving contact 1 moves clockwise around the middle shaft pin 4 under the action of the contact pressure spring 11. The tendency of rotation makes the moving contact silver point 16 and the static contact silver point 15 contact and press tightly, and form contact pressure; A very large electric repulsion F1 will be generated between 15, and at the same time the short-circuit current flows through the movable contact 1, generating an electric repulsion F3, the resultant force of the electric repulsion F1 and F3 makes the movable contact 1 rotate counterclockwise around the middle shaft pin 4 The contact pressure spring 11 blocks this rotation tendency, compensates the influence of the electric repulsion force on the contact pressure between the dynamic and static contacts, and maintains sufficient contact pressure at the silver point 16 of the moving contact and the silver point 15 of the static contact, preventing the dynamic Contact 1 is repelled. The remarkable feature of this structure is that: the electric repulsion F3 is distributed on the upper and lower sides of the middle shaft pin 4, and most of them cancel each other out, so that the repulsion to be overcome by the contact pressure spring 11 is greatly reduced, thereby greatly improving the contact resistance of the circuit breaker. The ability to withstand current for a short time. At the same time, when the short circuit opens, the fulcrum formed at the middle shaft pin 4 is removed, and all the opening springs 13, contact pressure springs 11, electric repulsion F1 and F3 will push the movable contact 1 to retreat backward (around the shaft pin 6 Rotate counterclockwise) to maximize the opening speed, which is beneficial to improve the breaking capacity of the circuit breaker. Therefore, the invention significantly improves the short-term withstand capacity and opening speed of the DC circuit breaker, and is especially suitable for DC circuit breakers with high requirements on short-term withstand capacity and breaking capacity.
如图4所示在分闸过程中，脱扣力F2作用于推杆组合的金属拨叉推杆2的拨片上，金属拨叉推杆2与中部轴销4分离，中部轴销4的支点作用消失，此时动触头1在触头压力弹簧11和分闸弹簧13的共同作用下先相对于腰形孔7整体后移，当腰形孔7前侧紧贴轴销6后，触头压力弹簧11与分闸弹簧13共同作用使得动触头1以轴销6为转动轴作逆时针旋转，动触头银点16与静触头银点15迅速分离；本结构的显著特点在于：分闸弹簧13与提供动静触点合闸保持力的触头压力弹簧11位于动触头1的同侧，此结构方案的设计，保证分闸弹簧13在分闸过程中无需克服提供动静触点接触压力的触头压力弹簧11反力作用，且触头压力弹簧11能在分闸过程前期提供向后的辅助驱动力，加快动触头分闸速度，完成断路器的快速分闸，提高了断路器的短路开断性能。As shown in Figure 4, during the opening process, the tripping force F2 acts on the paddle of the metal shift fork push rod 2 of the push rod combination, the metal shift fork push rod 2 is separated from the middle shaft pin 4, and the fulcrum of the middle shaft pin 4 The effect disappears, and at this time, the movable contact 1 moves backward relative to the waist-shaped hole 7 as a whole under the joint action of the contact pressure spring 11 and the opening spring 13. When the front side of the waist-shaped hole 7 is close to the shaft pin 6, the contact The head pressure spring 11 and the opening spring 13 work together to make the moving contact 1 rotate counterclockwise with the shaft pin 6 as the rotation axis, and the silver point 16 of the moving contact is separated from the silver point 15 of the static contact quickly; the remarkable feature of this structure is that : The opening spring 13 and the contact pressure spring 11 that provides the closing force of the dynamic and static contacts are located on the same side of the moving contact 1. The design of this structural scheme ensures that the opening spring 13 does not need to overcome the provision of dynamic and static contacts during the opening process. The contact pressure spring 11 of the point contact pressure acts as a reaction force, and the contact pressure spring 11 can provide a backward auxiliary driving force in the early stage of the opening process, speed up the opening speed of the moving contact, complete the rapid opening of the circuit breaker, and improve The short-circuit breaking performance of the circuit breaker.
当快速脱扣动作完成后，断路器分闸，脱扣力F2消失，推杆组合可在动力装置后驱力的作用下向后运动，同时推杆复位弹簧19驱动绝缘推杆3绕推杆转轴17向上转动，使金属拨叉推杆2恢复到水平状态，金属拨叉推杆2前端恢复与中部轴销4的碰撞接触状态，准备下一次合闸工作，即图1初始状态，此时断路器可再次进行合闸、分闸动作。When the quick tripping action is completed, the circuit breaker is opened, the tripping force F2 disappears, the push rod combination can move backward under the action of the rear driving force of the power device, and the push rod return spring 19 drives the insulating push rod 3 around the push rod The rotating shaft 17 rotates upwards, so that the metal shift fork push rod 2 returns to the horizontal state, and the front end of the metal shift fork push rod 2 returns to the collision contact state with the middle shaft pin 4, and is ready for the next closing operation, which is the initial state in Figure 1. At this time The circuit breaker can be closed and opened again.
所述实施例为本发明的优选的实施方式，但本发明并不限于上述实施方式，在不背离本发明的实质内容的情况下，本领域技术人员能够做出的任何显而易见的改进、替换或变型均属于本发明的保护范围。The described embodiment is a preferred implementation of the present invention, but the present invention is not limited to the above-mentioned implementation, without departing from the essence of the present invention, any obvious improvement, replacement or modification that those skilled in the art can make Modifications all belong to the protection scope of the present invention.
Claims (9)
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| CN201510053626.3A CN104681371A (en) | 2015-02-02 | 2015-02-02 | Variable rotating shaft contact structure for direct current circuit breaker |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108010791A (en) * | 2017-11-30 | 2018-05-08 | 浙江紫光电器有限公司 | A kind of disjunction mechanism of arc-chutes quick acting switching-off |
| CN108847378A (en) * | 2018-08-22 | 2018-11-20 | 天津市百利电气有限公司 | Moving contact of breaker device |
| CN109509687A (en) * | 2018-11-06 | 2019-03-22 | 安士缔(中国)电气设备有限公司 | A kind of short-circuit device applied to breaker |
| CN111668075A (en) * | 2020-07-06 | 2020-09-15 | 江苏大全高压开关有限公司 | A circuit breaker mechanism with a locking device for preventing the opening and bouncing of moving contacts |
| CN111933477A (en) * | 2020-06-22 | 2020-11-13 | 华翔翔能科技股份有限公司 | Zero-flashover molded case circuit breaker |
| CN114649174A (en) * | 2020-12-21 | 2022-06-21 | 上海良信电器股份有限公司 | Moving contact system easy to install and assembling method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201369302Y (en) * | 2009-02-06 | 2009-12-23 | 湘潭电机股份有限公司 | Direct-current electromagnetic high-speed breaker |
| CN102270553A (en) * | 2011-07-04 | 2011-12-07 | 西安交通大学 | Rapid repulsion tripping mechanism for direct-current circuit breaker and tripping method thereof |
| CN102290297A (en) * | 2011-07-28 | 2011-12-21 | 西安交通大学 | Quick release mechanism capable of preventing impact and vibration for direct current breaker |
| CN102891049A (en) * | 2012-10-29 | 2013-01-23 | 大全集团有限公司 | Contact structure of air circuit breaker |
| CN204102826U (en) * | 2014-08-12 | 2015-01-14 | 西安交通大学 | A kind of DC circuit breaker |
| CN204464214U (en) * | 2015-02-02 | 2015-07-08 | 大全集团有限公司 | A DC circuit breaker variable shaft contact structure |
-
2015
- 2015-02-02 CN CN201510053626.3A patent/CN104681371A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201369302Y (en) * | 2009-02-06 | 2009-12-23 | 湘潭电机股份有限公司 | Direct-current electromagnetic high-speed breaker |
| CN102270553A (en) * | 2011-07-04 | 2011-12-07 | 西安交通大学 | Rapid repulsion tripping mechanism for direct-current circuit breaker and tripping method thereof |
| CN102290297A (en) * | 2011-07-28 | 2011-12-21 | 西安交通大学 | Quick release mechanism capable of preventing impact and vibration for direct current breaker |
| CN102891049A (en) * | 2012-10-29 | 2013-01-23 | 大全集团有限公司 | Contact structure of air circuit breaker |
| CN204102826U (en) * | 2014-08-12 | 2015-01-14 | 西安交通大学 | A kind of DC circuit breaker |
| CN204464214U (en) * | 2015-02-02 | 2015-07-08 | 大全集团有限公司 | A DC circuit breaker variable shaft contact structure |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108010791A (en) * | 2017-11-30 | 2018-05-08 | 浙江紫光电器有限公司 | A kind of disjunction mechanism of arc-chutes quick acting switching-off |
| CN108010791B (en) * | 2017-11-30 | 2024-02-20 | 浙江紫光电器有限公司 | Breaking mechanism for quick breaking of arc extinguishing chamber |
| CN108847378A (en) * | 2018-08-22 | 2018-11-20 | 天津市百利电气有限公司 | Moving contact of breaker device |
| CN109509687A (en) * | 2018-11-06 | 2019-03-22 | 安士缔(中国)电气设备有限公司 | A kind of short-circuit device applied to breaker |
| CN109509687B (en) * | 2018-11-06 | 2024-01-19 | 安士缔(中国)电气设备有限公司 | Be applied to short circuit device of circuit breaker |
| CN111933477A (en) * | 2020-06-22 | 2020-11-13 | 华翔翔能科技股份有限公司 | Zero-flashover molded case circuit breaker |
| CN111668075A (en) * | 2020-07-06 | 2020-09-15 | 江苏大全高压开关有限公司 | A circuit breaker mechanism with a locking device for preventing the opening and bouncing of moving contacts |
| CN114649174A (en) * | 2020-12-21 | 2022-06-21 | 上海良信电器股份有限公司 | Moving contact system easy to install and assembling method thereof |
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Application publication date: 20150603 |