CN108922833A - A kind of mechanical switch separating brake actuating mechanism - Google Patents
A kind of mechanical switch separating brake actuating mechanism Download PDFInfo
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- CN108922833A CN108922833A CN201810637469.4A CN201810637469A CN108922833A CN 108922833 A CN108922833 A CN 108922833A CN 201810637469 A CN201810637469 A CN 201810637469A CN 108922833 A CN108922833 A CN 108922833A
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- connecting rod
- busbar
- mechanical switch
- static contact
- crank
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- 230000007246 mechanism Effects 0.000 title claims abstract description 24
- 230000003068 static effect Effects 0.000 claims abstract description 31
- 230000009471 action Effects 0.000 claims description 16
- 230000007704 transition Effects 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/12—Automatic release mechanisms with or without manual release
- H01H71/42—Induction-motor, induced-current, or electrodynamic release mechanisms
- H01H71/43—Electrodynamic release mechanisms
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/66—Power reset mechanisms
- H01H71/70—Power reset mechanisms actuated by electric motor
Landscapes
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
Description
技术领域technical field
本发明涉及一种机械开关分闸动作机构，属于直流输电技术领域。The invention relates to an opening action mechanism of a mechanical switch, which belongs to the technical field of direct current transmission.
背景技术Background technique
目前，随着传统一次性能源的日渐减少，风能、太阳能等清洁能源被不断提出且日渐得到重视，但是，在清洁能源并入传统电网中出现了技术障碍，由此提出了直流输电用的直流断路器，可在直流系统中迅速制造电流过零点，切断快速上升的故障电流；吸收开断过程中平波电抗器等感性元件中储存的能量；以及限制因开断故障电流时的电磁能量转换而引起过电压。At present, with the reduction of traditional primary energy, clean energy such as wind energy and solar energy has been continuously proposed and has been increasingly valued. However, there are technical obstacles in the integration of clean energy into traditional power grids. The circuit breaker can quickly create a current zero crossing point in the DC system and cut off the rapidly rising fault current; absorb the energy stored in inductive elements such as smoothing reactors during the breaking process; and limit the electromagnetic energy conversion when breaking the fault current causing overvoltage.
常见的直流断路器主要有三类，包括全固态直流断路器、混合式直流断路器和机械式直流断路器（也称机械开关），其中，机械开关具有通态损耗小、元件可靠性高的优点被广泛使用，但是，现有的机械开关在分合闸速度和保持力上仍有待改善。There are three main types of common DC circuit breakers, including all-solid-state DC circuit breakers, hybrid DC circuit breakers and mechanical DC circuit breakers (also called mechanical switches). Among them, mechanical switches have the advantages of small on-state loss and high component reliability. It is widely used, but the existing mechanical switches still need to be improved in terms of opening and closing speed and holding force.
中国专利CN102592902A公开了一种中低压直流断路器的高速分闸操动机构，如图1所示，包括固定在下母排5上的动触头1和固定在上母排9上的静触头8，当断路器处于合闸状态时，上母排9、静触头8、动触头1和下母排5形成导电回路；当系统发生短路故障时，控制器检测到短路电流信号，并产生晶闸管的触发信号，触发晶闸管导通，导通后已经储能的电容将迅速向线圈13放电，产生一个脉冲电流，基于电磁感应涡流原理，斥力盘11将产生电磁斥力以推动分闸推杆10运动，分闸推杆10直接作用在动触头1上，斥力机构产生的电磁斥力克服合闸保持弹簧4的合闸保持力，迅速将动触头1推开，而斥力机构在完成一次分闸操作后，在复位弹簧12的作用下，斥力盘11再次与线圈13紧贴，以便进行下一次的分闸操作。但是，上述分闸操动机构需要使用合闸保持弹簧4、复位弹簧12以及保持分闸到位后的钩状杆保持弹簧7，大量弹簧的使用会降低整个操动机构的使用可靠性，进而会影响直流输电的安全。Chinese patent CN102592902A discloses a high-speed opening operating mechanism for medium and low voltage DC circuit breakers, as shown in Figure 1, including a moving contact 1 fixed on the lower busbar 5 and a static contact fixed on the upper busbar 9 8. When the circuit breaker is in the closed state, the upper busbar 9, the static contact 8, the moving contact 1 and the lower busbar 5 form a conductive circuit; when a short-circuit fault occurs in the system, the controller detects the short-circuit current signal, and Generate the trigger signal of the thyristor to trigger the conduction of the thyristor. After the conduction, the capacitor that has stored energy will quickly discharge to the coil 13 to generate a pulse current. Based on the principle of electromagnetic induction eddy current, the repulsion plate 11 will generate electromagnetic repulsion to push the opening push rod 10 movement, the opening push rod 10 directly acts on the moving contact 1, the electromagnetic repulsion generated by the repulsion mechanism overcomes the closing holding force of the closing holding spring 4, and quickly pushes the moving contact 1 away, and the repulsion mechanism completes a After the opening operation, under the action of the return spring 12, the repulsive disk 11 is in close contact with the coil 13 again, so as to perform the next opening operation. But the above-mentioned opening operating mechanism needs to use the closing holding spring 4, the return spring 12 and the hook-shaped rod holding spring 7 after the opening is put in place. The use of a large number of springs will reduce the reliability of the entire operating mechanism, and then will Affect the safety of direct current transmission.
发明内容Contents of the invention
为解决以上技术上的不足，本发明提供了一种机械开关分闸动作机构，利用曲柄连杆结构带动动触头动作，可在实现快速分合闸的同时确保整个机构的使用可靠性。In order to solve the above technical deficiencies, the present invention provides a mechanical switch opening action mechanism, which uses the crank connecting rod structure to drive the moving contact to move, which can ensure the reliability of the entire mechanism while realizing rapid opening and closing.
本发明的技术方案如下：一种机械开关分闸动作机构，包括上母排和下母排，所述上母排的一侧连接有上静触头，下母排上与上母排的同侧位置连接有下静触头，所述上静触头和下静触头分别与位于连杆上的上动触头和下动触头配合，连杆的下端设置有连杆头，连杆头套装在曲柄上，曲柄连接有电机。The technical solution of the present invention is as follows: a mechanical switch opening action mechanism, including an upper busbar and a lower busbar, one side of the upper busbar is connected with an upper static contact, and the lower busbar is connected with the upper busbar. The side position is connected with a lower static contact, and the upper static contact and the lower static contact are respectively matched with the upper movable contact and the lower movable contact on the connecting rod. The lower end of the connecting rod is provided with a connecting rod head, and the connecting rod The head is set on the crank, and the crank is connected with a motor.
本发明的技术方案还包括：所述连杆为空心结构。The technical solution of the present invention also includes: the connecting rod is a hollow structure.
本发明的技术方案还包括：所述连杆的截面呈工字型。The technical solution of the present invention also includes: the cross section of the connecting rod is I-shaped.
本发明的技术方案还包括：所述连杆的截面呈H型。The technical solution of the present invention also includes: the cross section of the connecting rod is H-shaped.
本发明的技术方案还包括：所述连杆与连杆头焊接。The technical solution of the present invention also includes: the connecting rod is welded to the connecting rod head.
本发明的技术方案还包括：所述连杆头呈分体式结构，连杆头包括通过螺栓连接的上半体和下半体。The technical solution of the present invention also includes: the connecting rod head has a split structure, and the connecting rod head includes an upper half body and a lower half body connected by bolts.
本发明的技术方案还包括：所述上半体和下半体内安装有衬套。The technical solution of the present invention also includes: bushings are installed inside the upper half body and the lower half body.
本发明的技术方案还包括：所述曲柄的拐角位置采用圆弧过渡。The technical solution of the present invention also includes: the corner position of the crank adopts a circular arc transition.
本发明的有益效果是：在上母排和下母排上分别设置上静触头和下静触头，并利用曲柄连杆结构带动连杆上下动作，进而带动安装在连杆上部和下部的上动触头和下动触头与上静触头和下静触头接触或分离，以此来实现机械开关的导通与分闸，动作快速准确，且避免了采用弹簧造成的整个动作机构使用可靠性差的问题，可确保直流输电的安全。The beneficial effect of the present invention is: the upper static contact and the lower static contact are respectively arranged on the upper busbar and the lower busbar, and the crank connecting rod structure is used to drive the connecting rod to move up and down, and then drive the connecting rods installed on the upper and lower parts of the connecting rod The upper moving contact and the lower moving contact contact or separate from the upper static contact and the lower static contact, so as to realize the conduction and opening of the mechanical switch, the action is fast and accurate, and the entire action mechanism caused by the use of springs is avoided The problem of poor reliability can be used to ensure the safety of DC transmission.
附图说明Description of drawings
图1是现有分闸操动机构的示意图。Fig. 1 is a schematic diagram of an existing opening operating mechanism.
图2是本发明的示意图。Figure 2 is a schematic diagram of the present invention.
图中，1、上母排，2、下母排，3、上静触头，4、下静触头，5、上动触头，6、下动触头，7、连杆，8、连杆头，9、曲柄，10、电机。In the figure, 1. Upper busbar, 2. Lower busbar, 3. Upper static contact, 4. Lower static contact, 5. Upper moving contact, 6. Lower moving contact, 7. Connecting rod, 8. Connecting rod head, 9, crank, 10, motor.
具体实施方式Detailed ways
以下结合附图，通过实施例对本发明作进一步说明。The present invention will be further described through the embodiments below in conjunction with the accompanying drawings.
如图2所示，本发明的机械开关分闸动作机构，包括上母排1和下母排2，在上母排1的一侧连接有上静触头3，同样地，在下母排3上与上母排1的同侧位置连接有下静触头4，在设置上静触头3和下静触头4的一侧旁放置有连杆7，连杆7的上部和下部分别连接有上动触头5和下动触头6，连杆7的下端设置有连杆头8，连杆头8套装在曲柄9上，曲柄9由电机10驱动转动。As shown in Figure 2, the mechanical switch opening action mechanism of the present invention includes an upper busbar 1 and a lower busbar 2, an upper static contact 3 is connected to one side of the upper busbar 1, and similarly, an upper static contact 3 is connected to the lower busbar 3 The lower static contact 4 is connected to the position on the same side as the upper busbar 1, and a connecting rod 7 is placed next to the side where the upper static contact 3 and the lower static contact 4 are arranged, and the upper and lower parts of the connecting rod 7 are respectively connected to There is an upper movable contact 5 and a lower movable contact 6. The lower end of the connecting rod 7 is provided with a connecting rod head 8. The connecting rod head 8 is sleeved on the crank 9, and the crank 9 is driven by a motor 10 to rotate.
当机械开关处于合闸状态时，电机10驱动曲柄9转动带动连杆头8位于高点位置，此时，位于连杆7上的上动触头5与上静触头3接触、连杆7上的下动触头6与下静触头4接触，由此上母排1、上静触头3、上动触头5、下动触头6、下静触头4和下母排2实现电路导通；当出现故障需要分闸时，启动电机10驱动曲柄9转动使连杆头8位于低点位置，此时连杆7随着向下移动，使得上动触头5与上静触头3分离，下动触头6与下静触头4分离，由此实现电路的断开，当故障修复好需要合闸时，只需再启动电机10带动曲柄9转动即可，无需使用弹簧，整个动作机构的可靠性好且可快速分合闸。When the mechanical switch is in the closing state, the motor 10 drives the crank 9 to rotate and drives the connecting rod head 8 to be at a high point position. At this time, the upper moving contact 5 on the connecting rod 7 contacts with the upper static contact 3, The upper lower moving contact 6 is in contact with the lower static contact 4, whereby the upper busbar 1, the upper static contact 3, the upper moving contact 5, the lower moving contact 6, the lower static contact 4 and the lower busbar 2 Realize the conduction of the circuit; when a fault occurs and the brake needs to be opened, the starter motor 10 drives the crank 9 to rotate so that the connecting rod head 8 is at the low point position. At this time, the connecting rod 7 moves downward, so that the upper moving contact 5 and the upper static contact The contact 3 is separated, and the lower moving contact 6 is separated from the lower static contact 4, thereby realizing the disconnection of the circuit. When the fault is repaired and the switch needs to be closed, it is only necessary to start the motor 10 again to drive the crank 9 to rotate without using Spring, the reliability of the whole action mechanism is good and it can open and close quickly.
本发明中，为了提高分合闸的速度，将连杆7设计成空心结构，或者，为了提高分合闸速度与连杆7结构的强度，将连杆7的截面设计成工字型或H型。In the present invention, in order to increase the speed of opening and closing, the connecting rod 7 is designed as a hollow structure, or, in order to improve the opening and closing speed and the strength of the structure of the connecting rod 7, the cross section of the connecting rod 7 is designed as I-shaped or H type.
连杆头8设计成分体式结构，具体包括通过螺栓连接的上半体和下半体，其中上半体与连杆7焊接，以方便装配，且在上半体和下半体内安装有衬套，以提高使用寿命。曲柄9的拐角位置采用圆弧过渡，以提高使用安全性。The connecting rod head 8 is designed as a split structure, specifically including an upper half body and a lower half body connected by bolts, wherein the upper half body is welded to the connecting rod 7 to facilitate assembly, and bushings are installed in the upper half body and the lower half body , to improve service life. The corner position of the crank 9 adopts a circular arc transition to improve the safety in use.
以上所述，仅是本发明的较佳实施例，并非对本发明做任何形式上的限制，凡在本发明的精神和原则之内所做任何修改、等同替换和改进等，均应包含在本发明的保护范围之内。The above are only preferred embodiments of the present invention, and do not limit the present invention in any form. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention shall be included in this within the scope of protection of the invention.
Claims (8)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810637469.4A CN108922833A (en) | 2018-06-20 | 2018-06-20 | A kind of mechanical switch separating brake actuating mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810637469.4A CN108922833A (en) | 2018-06-20 | 2018-06-20 | A kind of mechanical switch separating brake actuating mechanism |
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| CN108922833A true CN108922833A (en) | 2018-11-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810637469.4A Pending CN108922833A (en) | 2018-06-20 | 2018-06-20 | A kind of mechanical switch separating brake actuating mechanism |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112536536A (en) * | 2020-12-14 | 2021-03-23 | 河南职业技术学院 | Automatic outage structure and electric automatization laser cutting machine |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112536536A (en) * | 2020-12-14 | 2021-03-23 | 河南职业技术学院 | Automatic outage structure and electric automatization laser cutting machine |
| CN112536536B (en) * | 2020-12-14 | 2021-09-07 | 河南职业技术学院 | An automatic power-off structure and electrical automatic laser cutting machine |
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