A high voltage DC relay with magnetic steel arc extinguishing

Abstract

The present invention discloses a high-voltage DC relay with magnetic steel arc extinguishing, comprising two static contacts for providing current inflow and outflow respectively and a moving spring, the two ends of the moving spring are matched with the two static contacts respectively; the two ends of the moving spring are respectively provided with a magnetic steel component whose middle position can be directly opposite to the contact matching position; and the polar side of the magnetic steel component faces the corresponding contact matching position; the magnetic steel component is composed of two magnetic steels combined by stacking, embedding or splicing, and at least one end of one of the magnetic steels appears in the middle position of the combined magnetic steel component. The present invention can increase the magnetic field strength in the middle position of the magnetic steel component to meet the arc extinguishing needs of high voltage and large current, and can also make the production cost of the product not increase significantly. At the same time, it can also flexibly configure the arc extinguishing scheme according to the arc extinguishing needs.

Description

Technical Field

[0001] The invention relates to a DC relay, in particular to a high-voltage DC relay with magnetic steel arc extinguishing, which is used for cutting off high-voltage and high-current DC loads. Background Art

[0002] A relay is an electronic control device that has a control system (also known as an input circuit) and a controlled system (also known as an output circuit). It is usually used in automatic control circuits. It is actually an "automatic switch" that uses a smaller current to control a larger current. Therefore, it plays the role of automatic regulation, safety protection, and circuit conversion in the circuit. High-voltage DC relays are a type of relay. Most of the existing high-voltage DC relays use a direct-acting structure with a moving reed, that is, they use the cooperation of two stationary contacts and a moving reed to achieve the load current flowing in from one stationary contact and out from the other stationary contact.

[0003] With the increasing demand for system voltage in new energy vehicles and energy storage projects, the requirements for electronic components to withstand high voltages are further improved, requiring larger space and stronger magnetic field space for switch arc extinguishing. Such high-voltage DC relays in the prior art usually use magnetic steel arc extinguishing. A typical magnetic steel arc extinguishing setting method is to set two magnetic steels on the outside of the two ends of the length of the moving reed, and add U-shaped yoke iron clamps to the two magnetic steels respectively. Figure 1 FIG. 1 is a schematic diagram of the magnetic steel distribution of a high voltage DC relay in the prior art; Figure 1 As shown, this high-voltage DC relay includes two stationary contacts 100 and a moving reed 200. A magnetic steel 300 is provided on the outer sides of both ends of the length of the moving reed 200. A U-shaped yoke iron clamp 400 is also installed at the magnetic steel 300. The two ends of the U-shaped yoke iron clamp 400 are respectively provided on both sides of the width of the moving reed 200 and are located opposite to the stationary contacts 100. Figure 1 As shown, the applicant has found through experiments that in the magnetic steel 300, the magnetic lines of force at the middle position are relatively sparse, and the magnetic lines of force at the two ends are relatively dense, that is, the magnetic field strength at the middle position of the magnetic steel 300 is relatively weak, and the magnetic field strength at the two ends of the magnetic steel 300 is relatively strong. However, when the magnetic steel 300 is distributed, the middle of the magnetic steel 300 is usually facing the contact, so that the two ends of the magnetic steel 300 are often far away from the contact, thereby reducing the arc extinguishing ability of the magnetic steel 300. In order to improve the arc extinguishing ability, in the prior art, the arc extinguishing requirements are usually met by increasing the thickness of the magnetic steel or replacing it with a magnetic steel with a stronger magnetic field strength, which is bound to cause a significant increase in the production cost of the product, which is not conducive to the competition of the product. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a high-voltage DC relay with magnetic steel arc extinguishing. Through structural improvement, the magnetic field strength in the middle position of the magnetic steel component can be increased to meet the arc extinguishing needs of high voltage and large current, and the production cost of the product will not be greatly increased. At the same time, the arc extinguishing scheme can be flexibly configured according to the arc extinguishing needs.

[0005] The technical solution adopted by the present invention to solve its technical problems is: a high-voltage DC relay with magnetic steel arc extinguishing, including two static contacts for providing current inflow and outflow respectively and a moving spring, and the two ends of the moving spring are respectively matched with the two static contacts; magnetic steel components are respectively arranged at the two ends of the moving spring, and the middle position of which can be directly opposite to the contact matching position, and the polarity side of the magnetic steel component faces the corresponding contact matching position; the magnetic steel component is composed of two magnetic steels combined by stacking, embedding or splicing, and at least the end of one of the magnetic steels appears in the middle position of the combined magnetic steel component, so as to utilize the magnetic field strength of the end of the magnetic steel block to be greater than the magnetic field strength of the middle part of the magnetic steel block to enhance the magnetic field strength of the middle position of the combined magnetic steel component, thereby forming a better arc blowing effect.

[0006] The two magnets are one large and one small, and the overall size of the small magnet is smaller than that of the large magnet, and the peripheral size of the small magnet is equivalent to the middle position of the large magnet; the small magnet is stacked in the middle position of the side of the large magnet facing the contact, so that the end of the small magnet appears in the middle position of the combined magnet component, so as to utilize the magnetic field strength of the end of the small magnet to be greater than the magnetic field strength of the middle of the small magnet to enhance the magnetic field strength in the middle position of the combined magnet component.

[0007] The two magnets are one large and one small, and the peripheral size of the small magnet is smaller than that of the large magnet, and the peripheral size of the small magnet is equivalent to the middle position of the large magnet; a groove is provided in the middle position of the side of the large magnet facing the contact, and the small magnet is embedded in the groove, so that the end of the small magnet appears in the middle position of the combined magnet component, so as to utilize the magnetic field strength of the end of the small magnet to be greater than the magnetic field strength of the middle of the small magnet to enhance the magnetic field strength in the middle position of the combined magnet component.

[0008] The depth dimension of the groove is the same as the thickness dimension of the large magnetic steel block, and the thickness dimension of the small magnetic steel block is the same as the depth dimension of the groove.

[0009] The depth dimension of the groove is the same as the thickness dimension of the large magnetic steel, and the thickness dimension of the small magnetic steel is greater than the depth dimension of the groove, so that the small magnetic steel protrudes from the side of the large magnetic steel facing the contact.

[0010] The two magnets are exactly the same in size; the two magnets are spliced ​​together at the sides so that one end of each of the two magnets appears in the middle of the combined magnet component, so as to enhance the magnetic field strength in the middle of the combined magnet component by utilizing the fact that the magnetic field strength at the end of the magnet is greater than the magnetic field strength in the middle of the magnet.

[0011] The two magnetic steels have the same thickness and width dimensions but different length dimensions; the two magnetic steels are spliced ​​together in the length direction, and the splicing portion is located in the middle area of ​​the combined magnetic steel component, so as to utilize the magnetic field strength at the end of the magnetic steel to be greater than the magnetic field strength in the middle of the magnetic steel to enhance the magnetic field strength in the middle of the combined magnetic steel component.

[0012] There are two magnetic steel components, which are respectively arranged on the outside of two ends of the length of the moving spring piece.

[0013] The two magnetic steel components are also respectively configured with a U-shaped yoke iron clamp; the U-shaped bottom of the U-shaped yoke iron clamp contacts the side of the corresponding magnetic steel component that is opposite to the contact, and the two side arms of the U-shaped yoke iron clamp are respectively configured on both sides of the width of the moving spring sheet, so that the corresponding contact is accommodated in the U-shaped mouth of the U-shaped yoke iron clamp.

[0014] There are four magnetic steel components, which are respectively arranged on both sides of the width of the moving spring piece and are directly opposite to the corresponding contacts; and among the four magnetic steel components, the polarities of the sides facing the contacts of two magnetic steel components on the same side of the width of the moving spring piece are set to be the same, and the polarities of the sides facing the contacts of two magnetic steel components on different sides of the width of the moving spring piece are set to be different.

[0015] The four magnetic steel components are also respectively configured with two U-shaped yoke iron clamps; each U-shaped yoke iron clamp is respectively connected to two magnetic steel components, and the two side arms of the U-shaped U-shaped yoke iron clamp are respectively configured on both sides of the width of the moving spring piece, and are respectively in contact with the side of the corresponding two magnetic steel components facing away from the contact, and the U-shaped bottom of the U-shaped yoke iron clamp is located on the outside of the corresponding end of the length of the moving spring piece.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] The present invention adopts a magnetic steel component composed of two magnetic steels by stacking, embedding or splicing, and at least one end of one magnetic steel appears in the middle position of the combined magnetic steel component, so as to enhance the magnetic field strength in the middle position of the combined magnetic steel component by using the magnetic field strength of the end of the magnetic steel block greater than the magnetic field strength of the middle of the magnetic steel block, thereby forming a better arc blowing effect. This structure of the present invention can increase the magnetic field strength in the middle position of the magnetic steel component to meet the arc extinguishing needs of high voltage and large current, and can also make the production cost of the product not increase significantly. At the same time, it can also flexibly configure the arc extinguishing scheme according to the arc extinguishing needs.

[0018] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments; however, the high-voltage DC relay with magnetic steel arc extinguishing of the present invention is not limited to the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the magnetic steel distribution of a high voltage DC relay in the prior art;

[0020] Figure 2 is a schematic diagram of magnetic steel distribution in the first embodiment of the present invention;

[0021] Figure 3 is a schematic diagram of the three-dimensional shape of the magnetic steel distribution in the first embodiment of the present invention;

[0022] Figure 4 is a schematic diagram of magnetic steel distribution in the second embodiment of the present invention;

[0023] Figure 5 is a schematic diagram of the three-dimensional shape of the magnetic steel distribution in the second embodiment of the present invention;

[0024] Figure 6 is a schematic diagram of magnetic steel distribution in Embodiment 3 of the present invention;

[0025] Figure 7 is a schematic diagram of the three-dimensional shape of the magnetic steel distribution in the third embodiment of the present invention;

[0026] Figure 8 is a schematic diagram of magnetic steel distribution according to the fourth embodiment of the present invention;

[0027] Fig. 9 is a schematic diagram of the three-dimensional shape of the magnetic steel distribution in the fourth embodiment of the present invention;

[0028] Fig.10 is a schematic diagram of magnetic steel distribution in Embodiment 5 of the present invention;

[0029] Fig.11 is a schematic diagram of the three-dimensional shape of the magnetic steel distribution in the fifth embodiment of the present invention;

[0030] Fig.12is a schematic diagram of magnetic steel distribution in Embodiment 6 of the present invention;

[0031] Fig.13 is a schematic diagram of the three-dimensional shape of the magnetic steel distribution in the sixth embodiment of the present invention;

[0032] Fig.14 is a schematic diagram of magnetic steel distribution according to the seventh embodiment of the present invention;

[0033] Fig.15 is a schematic diagram of the three-dimensional shape of the magnetic steel distribution of the seventh embodiment of the present invention;

[0034] Fig.16 is a schematic diagram of magnetic steel distribution according to the eighth embodiment of the present invention;

[0035] Fig.17 is a schematic diagram of the three-dimensional shape of the magnetic steel distribution in the eighth embodiment of the present invention;

[0036] Fig.18 is a schematic diagram of magnetic steel distribution according to Embodiment 9 of the present invention;

[0037] Fig.19 is a schematic diagram of the three-dimensional shape of the magnetic steel distribution of the ninth embodiment of the present invention;

[0038] Fig. 20 is a schematic diagram of magnetic steel distribution according to the tenth embodiment of the present invention;

[0039] Fig.21 It is a three-dimensional schematic diagram of the magnetic steel distribution according to the tenth embodiment of the present invention.

[0040] Fig. 22 is a schematic diagram of magnetic steel distribution according to the eleventh embodiment of the present invention;

[0041] Fig.23 is a schematic diagram of the three-dimensional shape of the magnetic steel distribution according to the eleventh embodiment of the present invention;

[0042] Fig.24 is a schematic diagram of magnetic steel distribution according to the twelfth embodiment of the present invention;

[0043] Fig.25 It is a schematic diagram of the three-dimensional shape of the magnetic steel distribution according to the twelfth embodiment of the present invention. DETAILED DESCRIPTION

[0044] Embodiment 1

[0045] See also Figures 2 to 3As shown, a high-voltage DC relay with magnetic steel arc extinguishing of the present invention comprises two static contacts 1 for providing current inflow and outflow respectively and a moving spring 2, and the two ends of the moving spring 2 are respectively matched with the two static contacts 1; the two ends of the moving spring 2 are respectively provided with a magnetic steel component 3 whose middle position can be directly opposite to the contact matching position, and the polarity side of the magnetic steel component 3 faces the corresponding contact matching position; the magnetic steel component 3 is composed of two magnetic steels 31 and 32, and the middle position of the combined magnetic steel component 3 has at least one end of the magnetic steel, so as to enhance the magnetic field strength of the middle position of the combined magnetic steel component by utilizing the magnetic field strength of the end of the magnetic steel being greater than the magnetic field strength of the middle of the magnetic steel, thereby forming a better arc blowing effect.

[0046] In this embodiment, the two magnetic steels are one large and one small, and the overall size of the small magnetic steel 32 is smaller than the overall size of the large magnetic steel 31, and the peripheral size of the small magnetic steel 32 is equivalent to the middle position of the large magnetic steel 31; the small magnetic steel 32 is stacked in the middle position of the side of the large magnetic steel 31 facing the contact, so that the end of the small magnetic steel 32 appears in the middle position of the combined magnetic steel component 3, so as to utilize the magnetic field strength of the end of the small magnetic steel 32 to be greater than the magnetic field strength of the middle part of the small magnetic steel to enhance the magnetic field strength in the middle position of the combined magnetic steel component 3.

[0047] In this embodiment, the large magnetic steel 31 and the small magnetic steel 32 are both in the shape of a rectangle. The shape of the magnetic steel of the present invention includes but is not limited to a rectangle, and can be in various shapes.

[0048] In this embodiment, there are two magnetic steel components 3 , and the two magnetic steel components 3 are respectively arranged on the outside of both ends of the length of the movable spring piece 2 .

[0049] like Figure 1 The magnetic field distribution of the magnetic steel in the conventional technology shown makes the magnetic field strength at the center position significantly weaker than the magnetic field strength at the end position. The present invention superimposes a small magnetic steel 32 at the middle position of the large magnetic steel 31 so that the end of the small magnetic steel 32 appears in the middle position of the combined magnetic steel component 3. In this way, the end of the small magnetic steel 32 can be used to enhance the magnetic field strength at the middle position of the combined magnetic steel component 3. In addition, since the small magnetic steel 32 is superimposed at the middle position of the large magnetic steel 31, the thickness of the magnetic steel component 3 at the middle position is increased, and the magnetic field strength at the middle position of the magnetic steel component 3 is further enhanced, which can significantly improve the arc extinguishing ability.

[0050] A high-voltage DC relay with arc extinguishing by magnetic steel of the present invention adopts a magnetic steel component 3 composed of two magnetic steels 31 and 32 in a stacked manner, and the end of a small magnetic steel 32 appears in the middle position of the combined magnetic steel component 3, so as to enhance the magnetic field strength in the middle position of the combined magnetic steel component 3 by using the magnetic field strength of the end of the small magnetic steel 32 to be greater than the magnetic field strength in the middle of the small magnetic steel, thereby forming a better arc blowing effect. This structure of the present invention can increase the magnetic field strength in the middle position of the magnetic steel component to meet the arc extinguishing needs of high voltage and large current, and can also make the production cost of the product not increase significantly. At the same time, it can also flexibly configure the arc extinguishing scheme according to the arc extinguishing needs.

[0051] Embodiment 2

[0052] See also Figures 4 to 5 As shown, a high-voltage DC relay with magnetic steel arc extinguishing of the present invention is different from the first embodiment in that, among the large magnetic steel 31 and the small magnetic steel 32, the peripheral size of the small magnetic steel 32 is smaller than the peripheral size of the large magnetic steel 31, and the peripheral size of the small magnetic steel 32 is equivalent to the middle position of the large magnetic steel 31; a groove 311 is provided in the middle position of the side of the large magnetic steel 31 facing the contact, and the small magnetic steel 32 is embedded in the groove 311, so that the end of the small magnetic steel 32 appears in the middle position of the combined magnetic steel component 3, so as to utilize the magnetic field strength of the end of the small magnetic steel 32 to be greater than the magnetic field strength of the middle part of the small magnetic steel to enhance the magnetic field strength of the middle position of the combined magnetic steel component 3.

[0053] In this embodiment, the depth dimension of the groove 311 is the same as the thickness dimension of the large magnetic steel block 31 , and the thickness dimension of the small magnetic steel block 32 is the same as the depth dimension of the groove 311 .

[0054] Embodiment 3

[0055] See also Figure 6 to Figure 7 As shown, a high-voltage DC relay with magnetic steel arc extinguishing of the present invention is different from the first embodiment in that the thickness dimension of the small magnetic steel 32 is greater than the depth dimension of the groove 311, so that the small magnetic steel 32 protrudes from the side of the large magnetic steel 31 facing the contact.

[0056] Embodiment 4

[0057] See also Figures 8 to 9As shown, a high-voltage DC relay with magnetic arc extinguishing of the present invention is different from the first embodiment in that the two magnetic steels 31 and 32 are exactly the same in size; the two magnetic steels 31 and 32 are spliced ​​together by the side so that one end of each of the two magnetic steels 31 and 32 appears in the middle position of the combined magnetic steel component 3, so as to utilize the magnetic field strength of the end of the magnetic steel to be greater than the magnetic field strength of the middle of the magnetic steel to enhance the magnetic field strength in the middle position of the combined magnetic steel component.

[0058] Embodiment 5

[0059] See also Figure 10 to Figure 11 As shown, a high-voltage DC relay with magnetic arc extinguishing of the present invention is different from the first embodiment in that the thickness and width dimensions of the two magnetic steels 31 and 32 are the same but the length dimensions are different, and the length dimension of the magnetic steel 31 is greater than the length dimension of the magnetic steel 32; the two magnetic steels 31 and 32 are spliced ​​together in the length direction, and the splicing part is located in the middle position area of ​​the combined magnetic steel component 3, so as to utilize the magnetic field strength at the ends of the magnetic steels 31 and 32 to be greater than the magnetic field strength in the middle of the magnetic steel to enhance the magnetic field strength in the middle position of the combined magnetic steel component.

[0060] Embodiment 6

[0061] See also Figure 12 to Figure 13 As shown, a high-voltage DC relay with magnetic steel arc extinguishing of the present invention is different from the embodiment 1 in that the two magnetic steel parts 3 are also respectively configured with a U-shaped yoke clamp 4; the U-shaped bottom 41 of the U-shaped yoke clamp 4 is in contact with the side of the corresponding magnetic steel part 3 facing away from the contact, and the U-shaped side arms 42 of the U-shaped yoke clamp 4 are respectively configured on both sides of the width of the moving spring piece 2, so that the corresponding contact is accommodated in the U-shaped mouth of the U-shaped yoke clamp 4.

[0062] Embodiment 7

[0063] See also Figure 14 to Figure 15 As shown, a high-voltage DC relay with magnetic steel arc extinguishing of the present invention is different from Example 6 in that, among the large magnetic steel 31 and the small magnetic steel 32, the peripheral size of the small magnetic steel 32 is smaller than the peripheral size of the large magnetic steel 31, and the peripheral size of the small magnetic steel 32 is equivalent to the middle position of the large magnetic steel 31; a groove 311 is provided in the middle position of the side of the large magnetic steel 31 facing the contact, and the small magnetic steel 32 is embedded in the groove 311, and the depth dimension of the groove 311 is the same as the thickness dimension of the large magnetic steel 31, and the thickness dimension of the small magnetic steel 32 is the same as the depth dimension of the groove 311.

[0064] Embodiment 8

[0065] See also Figure 16 to Figure 17As shown, a high-voltage DC relay with magnetic arc extinguishing of the present invention is different from Example 6 in that the thickness dimension of the small magnetic steel 32 is greater than the depth dimension of the groove 311, so that the small magnetic steel 32 protrudes on the side of the large magnetic steel 31 facing the contact.

[0066] Embodiment 9

[0067] See also Figure 18 to Figure 19 As shown, a high-voltage DC relay with magnetic steel arc extinguishing of the present invention is different from the sixth embodiment in that the two magnetic steels 31 and 32 are exactly the same in size; the two magnetic steels 31 and 32 are spliced ​​together by the side.

[0068] Embodiment 10

[0069] See also Figure 20 to Figure 21 As shown, a high-voltage DC relay with magnetic arc extinguishing of the present invention is different from Example 6 in that the thickness and width dimensions of the two magnetic steels 31 and 32 are the same but the length dimensions are different, and the length dimension of the magnetic steel 31 is greater than the length dimension of the magnetic steel 32; the two magnetic steels 31 and 32 are spliced ​​together in the length direction.

[0070] Embodiment 11

[0071] See also Figure 22 to Figure 23 As shown, a high-voltage DC relay with magnetic steel arc extinguishing of the present invention is different from the first embodiment in that there are four magnetic steel components 3, and the four magnetic steel components 3 are respectively arranged on both sides of the width of the moving spring piece 2 and are directly opposite to the corresponding contacts; and among the four magnetic steel components 3, the polarities of the sides facing the contacts of the two magnetic steel components on the same side of the width of the moving spring piece 2 are set to be the same, and the polarities of the sides facing the contacts of the two magnetic steel components 3 on different sides of the width of the moving spring piece 2 are set to be different.

[0072] Embodiment 12

[0073] See also Figure 24 to Figure 25 As shown, a high-voltage DC relay with magnetic steel arc extinguishing of the present invention is different from the eleventh embodiment in that the four magnetic steel components 3 are further respectively configured with two U-shaped yoke iron clamps 4; each U-shaped yoke iron clamp 4 is respectively connected to two magnetic steel components 3, and the U-shaped two side arms 42 of the U-shaped yoke iron clamp 4 are respectively configured on both sides of the width of the moving spring 2, and are respectively in contact with the side of the two corresponding magnetic steel components 3 facing away from the contact, and the U-shaped bottom 41 of the U-shaped yoke iron clamp 4 is located on the outside of the corresponding end of the length of the moving spring 2.

[0074] The above is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with the art can make many possible changes and modifications to the technical solution of the present invention by using the technical content disclosed above, or modify it into an equivalent equivalent embodiment without departing from the scope of the technical solution of the present invention. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention should fall within the scope of protection of the technical solution of the present invention.

Claims

1. A high-voltage DC relay with magnetic steel arc extinguishing, comprising two static contacts for providing current inflow and outflow respectively and a moving spring, wherein the two ends of the moving spring are respectively matched with the two static contacts; a magnetic steel component whose middle position can be directly opposite to the contact matching position is respectively arranged at the two ends of the moving spring, and a polar side of the magnetic steel component faces the corresponding contact matching position; characterized in that: The magnetic steel component is composed of two magnetic steels that are stacked, embedded or spliced, and at least the end of one of the magnetic steels appears in the middle position of the combined magnetic steel component, so that the magnetic field strength of the end of the magnetic steel is greater than the magnetic field strength of the middle of the magnetic steel, thereby enhancing the magnetic field strength of the middle position of the combined magnetic steel component and forming a better arc blowing effect.

2. The high voltage DC relay with magnetic steel arc extinguishing according to claim 1, characterized in that: The two magnets are one large and one small, and the overall size of the small magnet is smaller than that of the large magnet, and the peripheral size of the small magnet is equivalent to the middle position of the large magnet; the small magnet is stacked in the middle position of the side of the large magnet facing the contact, so that the end of the small magnet appears in the middle position of the combined magnet component, so as to utilize the magnetic field strength of the end of the small magnet to be greater than the magnetic field strength of the middle of the small magnet to enhance the magnetic field strength in the middle position of the combined magnet component.

3. The high voltage DC relay with magnetic steel arc extinguishing according to claim 1, characterized in that: The two magnets are one large and one small, and the peripheral size of the small magnet is smaller than that of the large magnet, and the peripheral size of the small magnet is equivalent to the middle position of the large magnet; a groove is provided in the middle position of the side of the large magnet facing the contact, and the small magnet is embedded in the groove, so that the end of the small magnet appears in the middle position of the combined magnet component, so as to utilize the magnetic field strength of the end of the small magnet to be greater than the magnetic field strength of the middle of the small magnet to enhance the magnetic field strength in the middle position of the combined magnet component.

4. The high voltage DC relay with magnetic steel arc extinguishing according to claim 3 is characterized in that: The depth dimension of the groove is the same as the thickness dimension of the large magnetic steel block, and the thickness dimension of the small magnetic steel block is the same as the depth dimension of the groove.

5. The high voltage DC relay with magnetic steel arc extinguishing according to claim 3, characterized in that: The depth dimension of the groove is the same as the thickness dimension of the large magnetic steel, and the thickness dimension of the small magnetic steel is greater than the depth dimension of the groove, so that the small magnetic steel protrudes from the side of the large magnetic steel facing the contact.

6. The high voltage DC relay with magnetic steel arc extinguishing according to claim 1, characterized in that: The two magnets are exactly the same in size; the two magnets are spliced ​​together at the sides so that one end of each of the two magnets appears in the middle of the combined magnet component, so as to enhance the magnetic field strength in the middle of the combined magnet component by utilizing the fact that the magnetic field strength at the end of the magnet is greater than the magnetic field strength in the middle of the magnet.

7. The high voltage DC relay with magnetic steel arc extinguishing according to claim 1, characterized in that: The two magnetic steels have the same thickness and width dimensions but different length dimensions; the two magnetic steels are spliced ​​together in the length direction, and the splicing portion is located in the middle area of ​​the combined magnetic steel component, so as to utilize the magnetic field strength at the end of the magnetic steel to be greater than the magnetic field strength in the middle of the magnetic steel to enhance the magnetic field strength in the middle of the combined magnetic steel component.

8. The high voltage DC relay with magnetic steel arc extinguishing according to any one of claims 1 to 7, characterized in that: There are two magnetic steel components, and the two magnetic steel components are respectively arranged on the outside of both ends of the length of the movable spring piece.

9. The high voltage DC relay with magnetic steel arc extinguishing according to claim 8, characterized in that: The two magnetic steel components are also respectively configured with a U-shaped yoke iron clamp; the U-shaped bottom of the U-shaped yoke iron clamp contacts the side of the corresponding magnetic steel component that is opposite to the contact, and the two side arms of the U-shaped yoke iron clamp are respectively configured on both sides of the width of the moving spring sheet, so that the corresponding contact is accommodated in the U-shaped mouth of the U-shaped yoke iron clamp.

10. The high voltage DC relay with magnetic steel arc extinguishing according to any one of claims 1 to 7, characterized in that: There are four magnetic steel components, which are respectively arranged on both sides of the width of the moving spring piece and are directly opposite to the corresponding contacts; and among the four magnetic steel components, the polarities of the sides facing the contacts of two magnetic steel components on the same side of the width of the moving spring piece are set to be the same, and the polarities of the sides facing the contacts of two magnetic steel components on different sides of the width of the moving spring piece are set to be different.

11. The high voltage DC relay with magnetic steel arc extinguishing according to claim 10, characterized in that: The four magnetic steel components are also respectively configured with two U-shaped yoke iron clamps; each U-shaped yoke iron clamp is respectively connected to two magnetic steel components, and the two side arms of the U-shaped U-shaped yoke iron clamp are respectively configured on both sides of the width of the moving spring piece, and are respectively in contact with the side of the corresponding two magnetic steel components facing away from the contact, and the U-shaped bottom of the U-shaped yoke iron clamp is located on the outside of the corresponding end of the length of the moving spring piece.

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