A high voltage DC contactor with improved arc extinguishing capability

Abstract

The present invention discloses a high-voltage DC contactor with improved arc extinguishing capability, comprising: a frame, a mounting hole for mounting a static contact is also provided on the top of the frame, the static contact is installed in the mounting hole, an arc extinguishing system is provided inside the frame, the arc extinguishing system comprises a first arc extinguishing component, a second arc extinguishing component, a third arc extinguishing component and a fourth arc extinguishing component, the first arc extinguishing component and the second arc extinguishing component are located at one end of the static contact, the third arc extinguishing component and the fourth arc extinguishing component are located at the other end of the static contact, a first insulating plate is provided between the first arc extinguishing component and the second arc extinguishing component, a second insulating plate is provided between the third arc extinguishing component and the fourth arc extinguishing component, and magnetic steel plates are provided at the ends of the first insulating plate and the second insulating plate away from each other. Compared with the prior art, the high-voltage DC contactor has a simple structure, improves the performance of the high-voltage DC contactor and reduces the cost of error prevention and manufacturing costs during assembly.

Description

Technical Field

[0001] The invention relates to the technical field of high-voltage contactors, and in particular to a high-voltage direct current contactor with improved arc extinguishing capability. Background Art

[0002] With the rapid development of new energy in China, such as new energy electric vehicles (pure electric, plug-in hybrid), photovoltaic, wind power, energy storage, etc., the use of high-voltage DC contactors has increased exponentially. The actual voltage used by enterprises on high-voltage DC contactors is getting higher and higher, from the initial 72Vd.c. to 450Vd.c. for passenger cars, 750Vd.c. for commercial vehicles, and then to 1000Vd.c. for charging piles. Energy storage and special industries require 2000~2500Vd.c.; and the current also ranges from 100A to 1000A. Manufacturers need to improve the arc extinguishing ability of relays / contactors to ensure the breaking capacity of the products.

[0003] Existing high-voltage DC relay products produced abroad mostly use vacuum pumping or filling hydrogen, nitrogen and inert gas into the product to extinguish the arc, and increase the gap and magnetic blowing capacity of the relay / contactor on the existing basis to improve the arc extinguishing ability. The larger the gap, the greater the power of the driving coil, and the greater the energy consumption of the relay / contactor, which increases costs for customers.

[0004] At present, the high-voltage DC contactor magnets used by enterprises with arc-extinguishing grid structures require N / S relative, otherwise a short circuit will be formed during use, causing product failure; the manufacturing cost and error-proofing cost are also relatively high, increasing the manufacturer's product cost.

[0005] Therefore, the present invention needs to provide a contactor with a simple structure, which can improve the performance of the high-voltage DC contactor while reducing the cost of error prevention and manufacturing cost during the assembly process. Summary of the invention

[0006] The object of the present invention is to provide a high voltage DC contactor with improved arc extinguishing capability, thereby solving the above-mentioned problems existing in the prior art.

[0007] In order to achieve the above object, the technical solution adopted by the present invention is as follows: A high-voltage DC contactor with improved arc extinguishing capability comprises: a frame, a mounting hole for mounting a static contact is further provided on the top of the frame, the static contact is installed in the mounting hole, an arc extinguishing system is provided inside the frame, the arc extinguishing system comprises a first arc extinguishing component, a second arc extinguishing component, a third arc extinguishing component and a fourth arc extinguishing component, the first arc extinguishing component and the second arc extinguishing component are located at one end of the static contact, the third arc extinguishing component and the fourth arc extinguishing component are located at the other end of the static contact, a first insulating plate is provided between the first arc extinguishing component and the second arc extinguishing component, a second insulating plate is provided between the third arc extinguishing component and the fourth arc extinguishing component, and magnetic steel plates are provided at the ends of the first insulating plate and the second insulating plate away from each other.

[0008] Furthermore, grooves are provided at the positions where the first insulating plate and the second insulating plate are mounted with the magnetic steel plates.

[0009] Furthermore, the shape of the groove is the same as the shape of the magnetic steel plate.

[0010] Furthermore, the first arc extinguishing assembly, the second arc extinguishing assembly, the third arc extinguishing assembly and the fourth arc extinguishing assembly all include a first arc extinguishing grid frame and a second arc extinguishing grid frame, the arc extinguishing grid frame and the second arc extinguishing grid frame are arranged relatively to each other, a plurality of first grid pieces and a plurality of second grid pieces are arranged between the first arc extinguishing grid frame and the second arc extinguishing grid frame, and the first grid pieces and the second grid pieces are arranged adjacent to each other.

[0011] Furthermore, the first grid plate is smaller than the second grid plate.

[0012] Furthermore, the first arc-extinguishing grid frame and the second arc-extinguishing grid frame are provided with mounting holes for mounting the first grid piece and the second grid piece.

[0013] Furthermore, the first insulating plate and the second insulating plate each include: a first part and a second part, the first part is installed on a side of the second part close to the first part, and a contact surface between the second part and the first part is smaller than a contact surface between the first part and the second part.

[0014] Furthermore, the first part and the second part are connected by integral molding or welding.

[0015] Furthermore, the second portion forms a protruding block.

[0016] The beneficial effects of the present invention are: Since the arc extinguishing system is arranged in the frame of the present invention, and magnetic steel is arranged on the arc extinguishing system, physical isolation can be effectively performed through the magnetic steel, thereby effectively preventing arc breakdown. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is an exploded view of a high-voltage DC contactor with improved arc extinguishing capability according to the present invention; Figure 2 It is a cross-sectional view of a high-voltage DC contactor with improved arc extinguishing capability according to the present invention; Figure 3 is a structural diagram of the arc extinguishing assembly of the present invention; Figure 4 1 is a structural diagram of the first insulating plate and the second insulating plate of the present invention.

[0018] Reference numerals: Frame 1, mounting hole 2, first arc extinguishing assembly 3, second arc extinguishing assembly 4, third arc extinguishing assembly 5, fourth arc extinguishing assembly 6, first insulating plate, second insulating plate 8, first arc extinguishing grid frame 9, second arc extinguishing grid frame 10, first grid piece 11, second grid piece 12, first part 13, second part 14, groove 15, magnetic steel plate 16. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation methods described herein are only used to explain the present invention and are not used to limit the present invention.

[0020] Among them, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention or simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0021] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0022] The word “exemplary” is used exclusively herein to mean “serving as an example, example, or illustration.” Any embodiment described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments.

[0023] In addition, in order to better illustrate the present application, numerous specific details are given in the following specific embodiments. It should be understood by those skilled in the art that the present application can also be implemented without certain specific details. In some examples, methods, means, components and circuits well known to those skilled in the art are not described in detail in order to highlight the subject matter of the present application.

[0024] like Figure 1-2 As shown, a high-voltage DC contactor with improved arc extinguishing capability comprises: a frame 1, a mounting hole 2 for mounting a static contact is further provided on the top of the frame 1, the static contact is installed in the mounting hole 2, the interior of the frame 1 is provided with an arc extinguishing system, the arc extinguishing system comprises a first arc extinguishing component 3, a second arc extinguishing component 4, a third arc extinguishing component 5 and a fourth arc extinguishing component 6, the first arc extinguishing component 3 and the second arc extinguishing component 4 are located at one end of the static contact, the third arc extinguishing component 5 and the fourth arc extinguishing component 6 are located at the other end of the static contact, a first insulating plate 7 is provided between the first arc extinguishing component 3 and the second arc extinguishing component 4, a second insulating plate 8 is provided between the third arc extinguishing component 5 and the fourth arc extinguishing component 6, and magnetic steel plates 16 are provided at the ends of the first insulating plate 6 and the second insulating plate 8 away from each other.

[0025] It can be known from the above method that in the present invention, an arc extinguishing system is arranged in the frame, and the arc extinguishing system is provided with magnetic steel, which can effectively perform physical isolation and effectively prevent breakdown.

[0026] In order to install the magnetic steel plate, in this embodiment, the positions where the first insulating plate 7 and the second insulating plate 8 are installed with grooves 15, and the shape of the grooves 15 is the same as the shape of the magnetic steel plate, so that the magnetic steel plate can be firmly stuck in the grooves.

[0027] Specifically, the first arc extinguishing assembly 3, the second arc extinguishing assembly 4, the third arc extinguishing assembly 5 and the fourth arc extinguishing assembly 6 all include a first arc extinguishing grid frame 9 and a second arc extinguishing grid frame 10, the first arc extinguishing grid frame 9 and the second arc extinguishing grid frame 10 are arranged relatively to each other, and a plurality of first grid pieces 11 and a plurality of second grid pieces 12 are arranged between the first arc extinguishing grid frame 9 and the second arc extinguishing grid frame 10, the first grid piece 1 and the second grid piece 12 are arranged adjacent to each other, the first grid piece 11 is smaller than the second grid piece 12, the first grid piece and the second grid piece have the same shape, and in the actual production process, the first grid piece 11 and the second grid piece 12 have the same shape and size, and the first grid piece 11 and the second grid piece 12 are made of metal or non-metal, which is determined according to actual needs.

[0028] In addition, if Figure 3As shown, for the first grid piece 11 and the second grid piece 12, the first arc extinguishing grid frame 9 and the second arc extinguishing grid frame 10 are provided with mounting holes for mounting the first grid piece 11 and the second grid piece 12. When installing the first grid piece 11 and the second grid piece 12, the riveting rods of the first grid piece 11 and the second grid piece 12 are inserted into the mounting holes, so that the first grid piece 11 and the second grid piece 12 are firmly fixed between the first arc extinguishing grid frame and the second arc extinguishing grid frame.

[0029] In addition, it should be noted that Figure Figure 4 As shown, the first insulating plate and the second insulating plate both include: a first part 13 and a second part 14, the first part 13 is installed on a side of the second part 14 close to the first part 13, the contact surface between the second part 14 and the first part 13 is smaller than the contact surface between the first part 13 and the second part 14, the first part 13 and the second part 14 are connected by integral molding or welding, the second part 14 forms a protrusion block, and the protrusion block is located between the first arc extinguishing component 3 and the second arc extinguishing component 4, and between the third arc extinguishing component 5 and the fourth arc extinguishing component 6, thereby effectively isolating the arc.

[0030] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be considered as the scope of protection of the present invention.

Claims

1. A high voltage DC contactor with improved arc extinguishing capability, comprising: A frame, the top of which is also provided with a mounting hole for installing a static contact, the static contact is installed in the mounting hole, the interior of the frame is provided with a mounting hole, and the frame is provided with an arc extinguishing system, characterized in that the arc extinguishing system includes a first arc extinguishing component, a second arc extinguishing component, a third arc extinguishing component and a fourth arc extinguishing component, the first arc extinguishing component and the second arc extinguishing component are located at one end of the static contact, the third arc extinguishing component and the fourth arc extinguishing component are located at the other end of the static contact, a first insulating plate is provided between the first arc extinguishing component and the second arc extinguishing component, a second insulating plate is provided between the third arc extinguishing component and the fourth arc extinguishing component, and magnetic steel plates are provided at the ends of the first insulating plate and the second insulating plate away from each other.

2. The high-voltage DC contactor with improved arc extinguishing capability according to claim 1, characterized in that: Grooves are also provided at the locations where the first insulating plate and the second insulating plate are mounted with the magnetic steel plates.

3. The high-voltage DC contactor with improved arc extinguishing capability according to claim 2, characterized in that: The shape of the groove is the same as that of the magnetic steel plate.

4. The high-voltage DC contactor with improved arc extinguishing capability according to claim 1, characterized in that: The first arc extinguishing assembly, the second arc extinguishing assembly, the third arc extinguishing assembly and the fourth arc extinguishing assembly all include a first arc extinguishing grid frame and a second arc extinguishing grid frame, the arc extinguishing grid frame and the second arc extinguishing grid frame are arranged opposite to each other, a plurality of first grid pieces and a plurality of second grid pieces are arranged between the first arc extinguishing grid frame and the second arc extinguishing grid frame, and the first grid pieces and the second grid pieces are arranged adjacent to each other.

5. The high-voltage DC contactor with improved arc extinguishing capability according to claim 4, characterized in that: The first grid piece is smaller than the second grid piece.

6. The high voltage DC contactor with improved arc extinguishing capability according to claim 5, characterized in that: The first arc-extinguishing grid frame and the second arc-extinguishing grid frame are provided with mounting holes for mounting the first grid piece and the second grid piece.

7. The high-voltage DC contactor with improved arc extinguishing capability according to claim 1, characterized in that: The first insulating plate and the second insulating plate both include a first part and a second part, the first part is installed on a side of the second part close to the first part, and the contact surface between the second part and the first part is smaller than the contact surface between the first part and the second part.

8. The high-voltage DC contactor with improved arc extinguishing capability according to claim 7, characterized in that: The first part and the second part are connected by integral molding or welding.

9. The high-voltage DC contactor with improved arc extinguishing capability according to claim 8, characterized in that: The second portion forms a raised block.

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