High voltage DC relay with permanent magnet arc suppression

Abstract

To provide a high voltage DC relay with permanent magnet arc suppression.SOLUTION: A high voltage DC relay with permanent magnet arc suppression includes two fixed contact pull-out ends and one movable contactor, the movable contactor is disposed below the two fixed contact pull-out ends, both ends of the movable contactor correspond to and cooperate with the bottom ends of the two fixed contact pull-out ends, first permanent magnets are disposed around the movable contactor so as to correspond to the contact positions, and polarized surfaces of the first permanent magnets face the corresponding contacts, a third permanent magnet is further attached to a surface trailing the fixed contacts at the two fixed contact pull-out ends, the polarized surfaces of the third permanent magnet face the corresponding contacts, and the polarity of the surface of the third permanent magnet which faces the contacts of the permanent magnet is set to be opposite to the polarity of the surface of the first permanent magnet which faces the contacts. The present disclosure can strengthen the magnetic field strength at the contact points, and always direct the Lorentz force at an arc generation point in a direction favorable to arc suppression, thereby improving the arc suppression effect.SELECTED DRAWING: Figure 20

Description

[Technical field]

[0001] The present disclosure relates to the field of relay technology, and in particular to high voltage direct current relays with permanent magnet arc suppression. [Background technology]

[0002] Most of the conventional DC relays use a movable contact direct acting means (also called a solenoid direct acting means), whose contact part uses two fixed contacts and one movable contact. The two fixed contacts are generally attached to the top of a ceramic cover, the bottom ends of the two fixed contacts (i.e. the fixed contact pull-out ends) are extended into the ceramic cover, and the movable contact is distributed in the ceramic cover in a direct acting manner. Both ends of the movable contact correspond respectively to the bottom ends of the fixed contacts at the two fixed pull-out ends as movable contacts. When the movable contacts at both ends of the movable contact come into contact with the fixed contacts at the bottom ends of the two fixed contacts, current flows in from one of the fixed contacts, passes through the movable contact, and then flows out from the other fixed contact. The movable contact is attached to one end of the push rod part, and the other end of the push rod part is connected to the movable core of the magnetic circuit part, when the push rod part is moved upward by passing a current through the coil, both ends of the movable contact come into contact with the two fixed contacts respectively, and the load is turned on, when the current through the coil is cut off, the push rod part moves downward under the action of the return spring, and both ends of the movable contact are separated from the two fixed contacts respectively, and the load is turned off. Prior art high voltage DC relays generally use permanent magnets to extinguish the arc, that is, by disposing a permanent magnet around the contacts, the magnetic field generated by the permanent magnet is used to realize arc blowing. The most typical permanent magnet arrangement is to arrange one permanent magnet on each of the two longitudinal ends of the movable contact, and although this double permanent magnet arrangement has good arc flow direction and achieves the requirement of non-polarity, the magnetic field strength is weak (especially at the arc generation point and the center of the pull-out end), and for heavy load products, the ceramic cavity is larger, the magnetic field strength of the arc extinguishing part reaching the arc generation point is smaller, the initial arc extinguishing effect is poor, and when space is limited, the arc cannot always be extinguished in a timely manner. Therefore, such high voltage DC relays in the prior art cannot meet the improved needs of system loads for new energy vehicles and energy storage projects. Summary of the Invention [Problem to be solved by the invention]

[0003] An object of the present disclosure is to solve the shortcomings of the prior art and to provide a high voltage DC relay that, by improving its structure, can strengthen the magnetic field strength at the contact point and always direct the Lorentz force at the arc generating point in a direction favorable for arc extinguishing, thereby enabling longitudinal arc pulling to improve the arc extinguishing effect. [Means for solving the problem]

[0004] The technical solution used to solve the technical problem in the present disclosure is as follows: A high voltage DC relay capable of vertical arc pulling, comprising two fixed contact pull ends and one movable contact, the movable contact is disposed under the two fixed contact pull ends, and both ends of the movable contact correspond to the bottom ends of the two fixed contact pull ends as movable contacts, respectively, first permanent magnets are disposed around the movable contacts corresponding to the contact positions of the movable contacts and the fixed contacts, and the polarized faces of the first permanent magnets face the corresponding movable contacts and fixed contacts, thereby realizing arc extinction by utilizing the horizontal magnetic field formed by the first permanent magnet; a second permanent magnet is further disposed under the movable contacts corresponding to the contact positions of each movable contact and the fixed contact, and the polarity of the face of the second permanent magnet facing the movable contact and the fixed contact is reversed to the polarity of the face of the first permanent magnet facing the movable contact and the fixed contact, thereby using the first permanent magnet and the second permanent magnet to form a vertical magnetic field at the movable contact and the fixed contact locations, thereby enhancing the magnetic field strength at the contact locations, and further realizing arc extinction.

[0005] According to some embodiments of the present disclosure, there are two first permanent magnets, and the two first permanent magnets are disposed on the outside of both ends of the length of the movable contactor, respectively. The two second permanent magnets correspond to both ends of the length of the movable contactor, respectively, and are disposed between the middle of the length of the movable contactor and directly below the contact position of the movable contact and the fixed contact at the corresponding end. The projection of the second permanent magnet on the reference horizontal plane falls within the projection of the region between the two first permanent magnets on the reference horizontal plane.

[0006] According to some embodiments of the present disclosure, the two second permanent magnets corresponding to the contact positions of the two movable contacts and the fixed contacts are of an integral structure.

[0007] According to some embodiments of the present disclosure, there are two first permanent magnets, the two first permanent magnets are respectively arranged on the outside of both ends of the length of the movable contact, and a short circuit prevention ring is further attached at the middle position of the length of the movable contact. The two second permanent magnets correspond to both sides of the length of the movable contact, respectively, and are provided between the edge of the short circuit prevention ring and directly below the contact position of the movable contact and the fixed contact at the corresponding end. The projection of the second permanent magnet on the reference horizontal plane falls within the projection of the area between the two first permanent magnets on the reference horizontal plane.

[0008] According to some embodiments of the present disclosure, a first groove is provided on the bottom surface at both ends of the movable contactor's length, directly below the contact position between the movable contact and the fixed contact, and the two second permanent magnets are respectively fitted into the first grooves at both ends of the movable contactor's length.

[0009] According to some embodiments of the present disclosure, a yoke plate is further provided below the movable contact, and the two second permanent magnets are respectively attached to the region between the movable contact and the yoke plate.

[0010] According to some embodiments of the present disclosure, a yoke plate is further provided below the movable contactor, and the two second permanent magnets are attached to the yoke plate, respectively.

[0011] According to some embodiments of the present disclosure, the DC relay further includes two first U-shaped yokes respectively arranged on the two first permanent magnets, the U-shaped bottom walls of the two first U-shaped yokes respectively contact the surfaces facing away from the corresponding contacts of the corresponding first permanent magnets, and the U-shaped side walls of the two first U-shaped yokes respectively are arranged on both sides of the width of the movable contactor and face the corresponding contacts.

[0012] According to some embodiments of the present disclosure, a projection of a contact position between the movable contact and the fixed contact on a reference horizontal plane falls within a projection of a frame-shaped outline surrounded by a first U-shaped yoke on the reference horizontal plane.

[0013] According to some embodiments of the present disclosure, the number of the first permanent magnets is four, the four first permanent magnets are respectively arranged on the outer sides of both sides of the width of the movable contact and facing the corresponding movable contact and fixed contact, and the polarities of the faces of the two first permanent magnets corresponding to the same movable contact and fixed contact facing the corresponding movable contact and fixed contact are set to be the same. The two second permanent magnets are respectively located below the contact positions of the two movable contacts and the fixed contact, and the projection of the second permanent magnets on the reference horizontal plane falls within the projection of the area between the two first permanent magnets corresponding to the same movable contact and fixed contact on the reference horizontal plane.

[0014] According to some embodiments of the present disclosure, the two second permanent magnets are respectively located directly below the contact positions of the two movable contacts and the fixed contacts, and the projection of the second permanent magnets on a reference horizontal plane falls within the projection of the intermediate connection lines of the two first permanent magnets corresponding to the same movable contact and fixed contact on the reference horizontal plane.

[0015] According to some embodiments of the present disclosure, the DC relay further includes two second U-shaped yokes respectively arranged on the four first permanent magnets, the U-shaped bottom walls of the two second U-shaped yokes respectively corresponding to the outer sides of both longitudinal ends of the movable contactor, and the U-shaped side walls of the two second U-shaped yokes respectively arranged on both sides of the width of the movable contactor and contacting the surfaces facing away from the corresponding contacts of the first permanent magnets at the corresponding positions.

[0016] According to some embodiments of the present disclosure, the movable contactor corresponds to an intermediate position of the height of the first permanent magnet.

[0017] The present disclosure further provides a high voltage DC relay with permanent magnet arc extinction, comprising two fixed contact pull-out ends and a movable contact, the movable contact is disposed under the two fixed contact pull-out ends, and both ends of the movable contact correspond to and cooperate with the bottom ends of the two fixed contact pull-out ends as fixed contacts, first permanent magnets are disposed around the movable contacts corresponding to the contact positions, and the polarized faces of the first permanent magnets face the corresponding contacts, thereby realizing arc extinction by utilizing the horizontal magnetic field formed by the first permanent magnet. A third permanent magnet is further attached to the faces of the two fixed contact pull-out ends facing away from the fixed contacts, and the polarized faces of the third permanent magnet face the corresponding contacts, and the polarity of the faces of the third permanent magnet facing the contacts is the same as the polarity of the faces of the first permanent magnet facing the contacts, thereby using the first permanent magnet and the third permanent magnet to form a vertical magnetic field at the contact locations and strengthen the magnetic field strength at the contact locations, thereby further realizing arc extinction.

[0018] According to some embodiments of the present disclosure, the upper end of the fixed contact pull-out end is provided with a second groove recessed downward, and the third permanent magnet is fitted into the second groove and brings the third permanent magnet close to the corresponding contact.

[0019] According to some embodiments of the present disclosure, the third permanent magnet is circular, a cross-section of the second groove has a circular shape corresponding to the third permanent magnet, and the third permanent magnet is located in the middle of the fixed contact lead-out end in the same corresponding horizontal plane.

[0020] According to some embodiments of the present disclosure, the two movable contacts are protrusions integrally formed on both ends of the movable contact.

[0021] According to some embodiments of the present disclosure, there are two first permanent magnets, the two first permanent magnets are respectively arranged outside both longitudinal ends of the movable contactor, and the protrusions on both ends of the movable contactor are eccentrically in contact with the bottom ends of the two fixed contact pull-out ends, respectively.

[0022] According to some embodiments of the present disclosure, the protrusions at both ends of the movable contactor are provided on both end edges of the movable contactor, respectively, and the contact positions between the two fixed contact pull-out ends and the protrusions at both ends of the movable contactor are located relatively outside the bottom ends of the two fixed contact pull-out ends.

[0023] According to some embodiments of the present disclosure, the bottom end surface of the fixed contact pull-out end is circular, and the contact position between the fixed contact pull-out end and the protrusion of the movable contact does not exceed the center of the circle.

[0024] According to some embodiments of the present disclosure, the DC relay further includes two first U-shaped yokes respectively arranged on the two first permanent magnets, the U-shaped bottom walls of the two first U-shaped yokes respectively contact the surfaces of the corresponding first permanent magnets facing away from the corresponding contacts, and the U-shaped side walls of the two first U-shaped yokes respectively are arranged on both sides of the movable contact in the width direction and face the corresponding contacts.

[0025] According to some embodiments of the present disclosure, a projection of the cooperative positions of the movable contact and the fixed contact on a reference horizontal plane falls within a projection of a frame-shaped contour surrounded by a first U-shaped yoke on the reference horizontal plane.

[0026] According to some embodiments of the present disclosure, there are four first permanent magnets, the four first permanent magnets are respectively arranged outside both sides of the width of the movable contactor and face the corresponding contacts, and the polarities of the faces facing the corresponding contacts of the two first permanent magnets corresponding to the same contact are set to be the same.

[0027] According to some embodiments of the present disclosure, the DC relay further includes two second U-shaped yokes respectively arranged on the four first permanent magnets, the U-shaped bottom walls of the two second U-shaped yokes respectively corresponding to the outer sides of both longitudinal ends of the movable contactor, and the U-shaped side walls of the two second U-shaped yokes respectively arranged on both sides of the width of the movable contactor and contacting the surfaces facing away from the corresponding contacts of the first permanent magnets at the corresponding positions.

[0028] According to some embodiments of the present disclosure, the movable contactor corresponds to an intermediate position of the height of the first permanent magnet.

[0029] Compared with the prior art, the beneficial effects of the present disclosure are as follows:

[0030] 1. In the present disclosure, a third permanent magnet is further attached to the surface facing away from the fixed contacts at the two fixed contact pull-out ends, and the surface of the third permanent magnet with polarity faces the corresponding contact, and the polarity of the surface of the third permanent magnet facing the contact is opposite to that of the surface of the first permanent magnet facing the contact, so as to form a longitudinal magnetic field at the contact point by using the first permanent magnet and the third permanent magnet, and to enhance the magnetic field strength at the contact point, thereby further realizing arc extinction. Such a structure of the present disclosure can improve the longitudinal arc pull-out magnetic field, improve the central magnetic field strength at the pull-out ends, and accelerate the speed of magnetic arc blow-out at the moment of arc occurrence.

[0031] 2. In the present disclosure, the two movable contacts are integrally formed as protrusions on both ends of the movable contact, and the protrusions on both ends of the movable contact are eccentrically in contact with the bottom ends of the two fixed contacts. This structure of the present disclosure can strengthen the magnetic field strength at the contact points through the cooperation of the vertical arc-extracting magnetic field and the eccentric contact points, and can always direct the Lorentz force at the arc generating point in a direction favorable for arc extinction, thereby improving the arc extinction effect.

[0032] The present disclosure will be described in more detail below with reference to the drawings and examples, but the high voltage DC relay capable of vertical arc tension of the present disclosure is not limited to the examples. [Brief description of the drawings]

[0033] [Figure 1] FIG. 1 is a schematic diagram of a three-dimensional structure of a portion of Example 1 of the present disclosure. [Diagram 2] FIG. 2 is an exploded schematic diagram of a three-dimensional structure of a portion of Example 1 of the present disclosure. [Diagram 3] FIG. 2 is a top view of a partial structure of the first embodiment of the present disclosure. [Figure 4]FIG. 2 is a cross-sectional view of a portion of the structure of the first embodiment of the present disclosure. [Diagram 5] FIG. 11 is a cross-sectional view of a portion of the structure of Example 2 of the present disclosure. [Figure 6] FIG. 11 is a cross-sectional view of a portion of the structure of Example 3 of the present disclosure. [Figure 7] FIG. 11 is a cross-sectional view of a portion of the structure of Example 4 of the present disclosure. [Figure 8] FIG. 11 is a cross-sectional view of a portion of the structure of Example 5 of the present disclosure. [Figure 9] FIG. 13 is a schematic diagram of the three-dimensional structure of a portion of Example 6 of the present disclosure. [Figure 10] FIG. 13 is an exploded schematic diagram of a partial three-dimensional structure of Example 6 of the present disclosure. [Figure 11] FIG. 13 is a top view of a partial structure of Example 6 of the present disclosure. [Figure 12] FIG. 13 is a cross-sectional view of a portion of the structure of Example 6 of the present disclosure. [Figure 13] FIG. 13 is a bottom view of a partial structure of Example 7 of the present disclosure. [Figure 14] FIG. 11 is a cross-sectional view of a portion of the structure of Example 7 of the present disclosure. [Figure 15] FIG. 13 is a bottom view of a partial structure of Example 8 of the present disclosure. [Figure 16] FIG. 13 is a bottom view of a partial structure of Example 9 of the present disclosure. [Figure 17] FIG. 13 is a schematic diagram of the three-dimensional structure of Example 10 of the present disclosure. [Figure 18] FIG. 13 is an exploded schematic diagram of the three-dimensional structure of Example 10 of the present disclosure. [Figure 19] FIG. 16 is a top view of the tenth embodiment of the present disclosure. [Figure 20] FIG. 23 is a cross-sectional view (cross-sectional view along the longitudinal direction of the movable contact) of the tenth embodiment of the present disclosure. [Figure 21] FIG. 23 is a top view of an eleventh embodiment of the present disclosure. [Figure 22] FIG. 23 is a cross-sectional view of an eleventh embodiment of the present disclosure (a cross-sectional view of one of the contact points along the width direction of the movable contact). [Figure 23] FIG. 23 is a cross-sectional view of the eleventh embodiment of the present disclosure (a cross-sectional view at the other contact point along the width direction of the movable contactor). DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0034] Example 1 As shown in Figures 1 to 4, the high voltage DC relay capable of vertical arc pulling according to the present disclosure includes two fixed contact drawn ends 1 and one movable contact 2. The movable contact 2 is disposed below the two fixed contact drawn ends 1, and both ends of the movable contact 2 correspond to and cooperate as movable contacts with the bottom ends of the two fixed contact drawn ends 1 as fixed contacts. First permanent magnets 3 are disposed around the movable contact 2 in correspondence with the contact positions of the movable contacts and the fixed contacts, and the polarized faces of the first permanent magnets 3 face the corresponding movable contacts and fixed contacts, thereby realizing arc extinction by utilizing the horizontal magnetic field formed by the first permanent magnets 3. A second permanent magnet 4 is further provided under the movable contactor 2 corresponding to the contact position of each movable contact and fixed contact, and the polarity of the surface of the second permanent magnet 4 facing the movable contact and fixed contact is opposite to the polarity of the surface of the first permanent magnet 3 facing the movable contact and fixed contact. The first permanent magnet 3 and the second permanent magnet 4 are used to form a vertical magnetic field at the movable contact and fixed contact locations, thereby enhancing the magnetic field strength at the contact locations and further realizing arc extinguishing.

[0035] In this embodiment, there are two first permanent magnets 3, and the two first permanent magnets 3 are respectively arranged outside both ends of the longitudinal direction of the movable contactor 2. The two second permanent magnets 4 correspond respectively to both ends of the longitudinal direction of the movable contactor 2, and are provided between the middle of the longitudinal direction of the movable contactor 2 and directly below the contact position of the movable contact and the fixed contact at the corresponding end. The projection of the second permanent magnet 4 on the reference horizontal plane falls within the projection of the area between the two first permanent magnets 3 (i.e., the area surrounded by the connecting lines on both sides of the width of the two first permanent magnets 3) on the reference horizontal plane.

[0036] In this embodiment, a first groove 21 is provided on the bottom surface at both ends of the movable contact 2, which is recessed upward directly below the contact position between the movable contact and the fixed contact, and the two second permanent magnets 4 are respectively fitted into the first groove 21 at both ends of the movable contact 2. In this embodiment, as shown in Figure 4, the magnetic polarity of the surface of the first permanent magnet 3 corresponding to one end (left end) of the movable contact 2 facing the contact point is an S pole, the magnetic polarity of the surface of the first permanent magnet 3 corresponding to the other end (right end) of the movable contact 2 facing the contact point is also an S pole, the magnetic polarity of the surface (upward facing surface) of the second permanent magnet 4 corresponding to one end (left end) of the movable contact 2 facing the contact point is an N pole, and the magnetic polarity of the surface (upward facing surface) of the second permanent magnet 4 corresponding to the other end (right end) of the movable contact 2 facing the contact point is an N pole.

[0037] In this embodiment, the DC relay further includes two first U-shaped yokes 5 respectively arranged on the two first permanent magnets 3, the U-shaped bottom walls 51 of the two first U-shaped yokes 5 respectively contact the surfaces facing away from the corresponding contacts of the corresponding first permanent magnets 3, and the U-shaped side walls 52 of the two first U-shaped yokes are respectively arranged on both sides of the width of the movable contactor 2 and face the corresponding contacts.

[0038] In this embodiment, the projection of the contact position between the movable contact and the fixed contact on a reference horizontal plane falls within the projection of the frame outline surrounded by the first U-shaped yoke 5 on the reference horizontal plane.

[0039] In this embodiment, the movable contact 2 corresponds to the intermediate position of the height of the first permanent magnet 3 .

[0040] In this embodiment, a yoke plate 6 is further provided below the movable contact 2 .

[0041] The high voltage DC relay capable of pulling an arc in the vertical direction of the present disclosure further includes a second permanent magnet 4 provided under the movable contact 2 in correspondence with the contact position of each movable contact and fixed contact, and the polarity of the surface of the second permanent magnet 4 facing the movable contact and fixed contact is reversed to the polarity of the surface of the first permanent magnet 3 facing the movable contact and fixed contact, so that the first permanent magnet 3 and the second permanent magnet 4 are used to form a vertical magnetic field (shown by the arrow in FIG. 4) at the movable contact and fixed contact to strengthen the magnetic field strength at the contact point and further realize arc extinction. Such a structure of the present disclosure can improve the vertical arc extraction magnetic field, improve the central magnetic field strength at the extraction end, and accelerate the speed of magnetic arc blow-out at the moment of arc generation.

[0042] The high voltage DC relay capable of vertical arc pulling of the present disclosure has two second permanent magnets 4 fitted into the first grooves 21 at both ends of the length of the movable contact 2, respectively, i.e., the second permanent magnets 4 are located in the region between the bottom of the movable contact and the yoke plate 6, and a U-shaped yoke 5 is further disposed on the first permanent magnet. Such a structure of the present disclosure utilizes the magnetic collecting effect of the yoke plate 6 and the U-shaped yoke 5 to strengthen the strength of the vertical magnetic field between the first permanent magnet 3 and the second permanent magnet 4, further improve the vertical arc extraction magnetic field, further improve the central magnetic field strength at the extraction end, and further accelerate the speed of magnetic arc blow-out at the moment of arc generation.

[0043] Example 2 As shown in FIG. 5, the high voltage DC relay capable of vertical arc pulling of the present disclosure is different from Example 1 in that the magnetic polarities of the faces facing the contacts of the two first permanent magnets 3 are set to be different, so that the magnetic polarity of the face facing the contact of the first permanent magnet 3 corresponding to one end (left end) of the movable contact 2 is an S pole, the magnetic polarity of the face facing the contact of the first permanent magnet 3 corresponding to the other end (right end) of the movable contact 2 is an N pole, the magnetic polarity of the face facing the contact of the second permanent magnet 4 corresponding to one end (left end) of the movable contact 2 (one upward surface) is an N pole, and the magnetic polarity of the face facing the contact of the second permanent magnet 4 corresponding to the other end (right end) of the movable contact 2 (one upward surface) is an S pole.

[0044] Example 3 As shown in FIG. 6 , the high voltage DC relay capable of vertical arc pulling according to the present disclosure differs from Example 1 in that the mounting positions of the two second permanent magnets 4 are different; the two second permanent magnets 4 are not mounted on the bottom surface at both ends of the longitudinal side of the movable contactor 2, but are each mounted in the region between the movable contactor 2 and the yoke plate 6.

[0045] The second permanent magnet 4 in this embodiment is positioned lower than the second permanent magnet 4 in Example 1. Therefore, the second permanent magnet 4 needs to be adjusted horizontally so that it is close to the middle of the longitudinal direction of the movable contactor 2, rather than being positioned directly below the contact position between the movable contact and the fixed contact. In this way, it is possible to ensure that the magnetic field lines of the vertical magnetic field formed by the first permanent magnet 3 and the second permanent magnet 4 pass through the center of the pull-out end.

[0046] Example 4 As shown in FIG. 7 , the high voltage DC relay capable of vertical arc pulling according to the present disclosure differs from Example 1 in that the mounting positions of the two second permanent magnets 4 are different; the two second permanent magnets 4 are not mounted on the bottom surface at both longitudinal ends of the movable contactor 2, but are each mounted on a yoke plate 6.

[0047] The second permanent magnet 4 in this embodiment is positioned lower than the second permanent magnet 4 in Example 1. Therefore, the second permanent magnet 4 needs to be adjusted horizontally so that it is close to the middle of the longitudinal direction of the movable contactor 2, rather than being positioned directly below the contact position between the movable contact and the fixed contact. In this way, it is possible to ensure that the magnetic field lines of the vertical magnetic field formed by the first permanent magnet 3 and the second permanent magnet 4 pass through the center of the pull-out end.

[0048] The high voltage DC relay capable of vertical arc pulling of the present disclosure has a second permanent magnet 4 attached to a yoke plate 6, and a first U-shaped yoke 5 further disposed on the first permanent magnet 3. Such a structure of the present disclosure can utilize better magnetic collection effect due to the contact between the second permanent magnet 4 and the yoke plate 6, thereby better strengthening the strength of the vertical magnetic field between the first permanent magnet 3 and the second permanent magnet 4, further improving the vertical arc extraction magnetic field, further improving the central magnetic field strength of the extraction end, and further accelerating the speed of magnetic arc blow-out at the moment of arc generation.

[0049] Example 5 As shown in FIG. 8, the high voltage DC relay capable of vertical arc pulling of the present disclosure is different from Example 4 in that the magnetic polarities of the faces facing the contacts of the two first permanent magnets 3 are set to be different, so that the magnetic polarity of the face facing the contact of the first permanent magnet 3 corresponding to one end (left end) of the movable contact 2 is an S pole, the magnetic polarity of the face facing the contact of the first permanent magnet 3 corresponding to the other end (right end) of the movable contact 2 is an N pole, the magnetic polarity of the face facing the contact of the second permanent magnet 4 corresponding to one end (left end) of the movable contact 2 (one upward surface) is an N pole, and the magnetic polarity of the face facing the contact of the second permanent magnet 4 corresponding to the other end (right end) of the movable contact 2 (one upward surface) is an S pole.

[0050] Example 6 9 to 12, the high voltage DC relay capable of vertical arc pulling according to the present disclosure differs from Example 1 in that a short circuit prevention ring 7 is further attached to the intermediate position in the longitudinal direction of the movable contact 2. Due to the inclusion of the short circuit prevention ring 7, the second permanent magnet 4 is provided between the edge of the short circuit prevention ring 7 and directly below the contact position of the movable contact and fixed contact at the corresponding end, and in this example as well, the second permanent magnet 4 is fitted into the first groove 21 of the movable contact 2 in the same manner.

[0051] In this embodiment, the short circuit prevention ring 7 is formed by two straight-shaped upper armatures 71 and two U-shaped lower armatures 72 working together. The movable contact 2 has a through hole 22 formed in the middle of its longitudinal direction, penetrating the thickness of the movable contact 2. The two straight-shaped upper armatures 71 are generally fixed to the top of a U-shaped bracket of a push rod component of a relay by riveting or welding, and the two U-shaped lower armatures 72 are respectively fixed to the movable contact 2 by riveting. The side walls of the two U-shaped lower armatures 72 pass through the through hole 22 of the movable contact 2, and the top ends of the two U-shaped lower armatures 72 are both exposed to the upper surface of the movable contact. The two straight-shaped upper armatures 71 cooperate with each other, and a closed magnetic circuit is formed in the annular member formed by the straight-shaped upper armatures 71 and the U-shaped lower armatures 72 by using the annular magnetic field generated by the movable contact when electricity is passed through the movable contact, thereby achieving the purpose of resisting the electromotive repulsive force. The short circuit prevention ring 7 of this embodiment has two magnetic circuits, the magnetic circuits are less likely to be saturated, the increase in contact pressure is greater, and the attractive force generated by the magnetic circuits is greater.

[0052] Example 7 13 and 14, the high voltage DC relay capable of vertical arc pulling according to the present disclosure is different from the first embodiment in that there are four first permanent magnets 3, the four first permanent magnets 3 are respectively arranged on the outside of both sides of the width of the movable contactor 2 and face the corresponding movable contact and fixed contact, and the polarities of the faces facing the corresponding movable contact and fixed contact of the two first permanent magnets 3 corresponding to the same movable contact and fixed contact are set to be the same. The two second permanent magnets 4 are respectively located below the contact positions of the two movable contacts and fixed contacts, and the projection of the second permanent magnets 4 on the reference horizontal plane falls within the projection of the area between the two first permanent magnets 3 corresponding to the same movable contact and fixed contact on the reference horizontal plane.

[0053] In this embodiment, the two second permanent magnets 4 are respectively located directly below the contact positions of the two movable contacts and the fixed contacts, and the projection of the second permanent magnets 4 on the reference horizontal plane falls within the projection of the intermediate connection lines of the two first permanent magnets corresponding to the same movable contact and fixed contact on the reference horizontal plane.

[0054] In this embodiment, the DC relay further includes two second U-shaped yokes 8 respectively arranged on the four first permanent magnets 3, the U-shaped bottom walls 81 of the two second U-shaped yokes 8 respectively corresponding to the outer sides of both longitudinal ends of the movable contactor 2, and the U-shaped side walls 82 of the two second U-shaped yokes 8 respectively arranged on both sides of the width of the movable contactor 2 and contacting the surfaces facing away from the corresponding contacts of the first permanent magnets 3 at the corresponding positions.

[0055] In this embodiment, the magnetic polarity of the surfaces facing the contact points of the two first permanent magnets 3 corresponding to one end (left end) of the movable contact 2 is an N pole, the magnetic polarity of the surfaces facing the contact points of the two first permanent magnets 3 corresponding to the other end (right end) of the movable contact 2 is also an N pole, the magnetic polarity of the surface facing the contact points (the upward facing surface) of the second permanent magnet 4 corresponding to one end (left end) of the movable contact 2 is an S pole, and the magnetic polarity of the surface facing the contact points (the upward facing surface) of the second permanent magnet 4 corresponding to the other end (right end) of the movable contact 2 is an S pole.

[0056] Example 8 As shown in FIG. 15, the high voltage DC relay capable of vertical arc pulling of the present disclosure differs from Example 7 in that the magnetic polarity of the faces facing the contacts of the four first permanent magnets 3 is different, the magnetic polarity of the faces facing the contacts of the two first permanent magnets 3 corresponding to one end (left end) of the movable contact 2 is an S pole, the magnetic polarity of the faces facing the contacts of the two first permanent magnets 3 corresponding to the other end (right end) of the movable contact 2 is an N pole, and the magnetic polarity of the faces facing the contacts of the second permanent magnets 4 are correspondingly adjusted, so that the magnetic polarity of the face facing the contacts (one upward face) of the second permanent magnet 4 corresponding to one end (left end) of the movable contact 2 is an N pole, and the magnetic polarity of the face facing the contacts (one upward face) of the second permanent magnet 4 corresponding to the other end (right end) of the movable contact 2 is an S pole.

[0057] Example 9 As shown in FIG. 16, the high voltage DC relay capable of pulling an arc in the vertical direction according to the present disclosure differs from the seventh embodiment in that a short circuit prevention ring 7 is further attached to the intermediate position in the longitudinal direction of the movable contact 2.

[0058] Example 10 As shown in Figs. 17 to 20, the present disclosure further provides a high voltage DC relay with permanent magnet arc extinction, which includes two fixed contact pull-out ends 1 and one movable contact 2. The movable contact 2 is disposed below the two fixed contact pull-out ends 1, and both ends of the movable contact 2 correspond to and cooperate with the bottom ends of the two fixed contact pull-out ends 1 as fixed contacts. A first permanent magnet 3 is disposed on the outer sides of both longitudinal ends of the movable contact 2, and the polarized surface of the first permanent magnet 3 faces the corresponding contact, thereby realizing arc extinction by utilizing the horizontal magnetic field (shown in Fig. 19) formed by each of the two first permanent magnets 3. At the two fixed contact pull-out ends 1, a third permanent magnet 91 is further attached to the surface facing away from the fixed contacts, and the polarized surface of the third permanent magnet 91 faces the corresponding contact, and the polarity of the surface of the third permanent magnet 91 facing the contact is opposite to the polarity of the surface of the first permanent magnet facing the contact, so that a longitudinal magnetic field (shown in FIG. 20) is formed at the contact location by using the first permanent magnet 3 and the third permanent magnet 91 and the magnetic field strength at the contact location is enhanced, thereby further realizing arc extinguishing.

[0059] In this embodiment, the magnetic polarity of the surface of the first permanent magnet 3 corresponding to one end of the movable contact 2 facing the contact point is an N pole, the magnetic polarity of the surface of the first permanent magnet 3 corresponding to the other end of the movable contact 2 facing the contact point is an S pole, the magnetic polarity of the surface of the third permanent magnet 91 corresponding to one end of the movable contact 2 facing the contact point is an S pole, and the magnetic polarity of the surface of the first permanent magnet 3 corresponding to the other end of the movable contact 2 facing the contact point is an N pole.

[0060] In this embodiment, a downwardly recessed second groove 11 is provided at the upper ends of the two fixed contact pull-out ends 1, and the third permanent magnet 91 is fitted into the second groove 11 and brings the third permanent magnet 91 close to the corresponding contact.

[0061] In this embodiment, the third permanent magnet 91 is circular, the cross section of the second groove 11 is circular corresponding to the second permanent magnet, and the third permanent magnet 91 is located in the middle of the fixed contact lead-out end 1 in the same horizontal plane.

[0062] In this embodiment, the two movable contacts are protrusions 23 integrally formed on both ends of the movable contactor 2, and the protrusions 23 on both ends of the movable contactor 2 are in eccentric contact with the bottom ends of the two fixed contact pull-out ends 1, respectively. The protrusions 23 are formed by being struck by the movable contactor 2 in the thickness direction.

[0063] In this embodiment, the protrusions 23 at both ends of the movable contact 2 are provided on the edges of both ends of the movable contact 2. The contact positions 12 between the two fixed contact pull-out ends 1 and the protrusions 23 at both ends of the movable contact 2 are located relatively outside the bottom ends of the two fixed contact pull-out ends.

[0064] In this embodiment, the bottom end surface of the fixed contact pull-out end 1 is circular, and the contact position 12 between the fixed contact pull-out end 1 and the protrusion 23 of the movable contact 2 does not exceed the center of the circle, that is, the bottom end surface of the fixed contact pull-out end 1 and the protrusion 23 of the movable contact 2 are in eccentric contact.

[0065] In this embodiment, the movable contact 2 corresponds to the intermediate position of the height of the first permanent magnet 3 .

[0066] In this embodiment, the DC relay further includes two first U-shaped yokes 5 respectively arranged on the two first permanent magnets, the U-shaped bottom walls 51 of the two first U-shaped yokes 5 respectively contact the surfaces facing away from the corresponding contacts of the corresponding first permanent magnets 3, and the U-shaped side walls 52 of the two first U-shaped yokes 5 respectively are arranged on both sides of the width of the movable contactor 2 and face the corresponding contacts.

[0067] In this embodiment, the projection of the cooperative positions of the movable contact and the fixed contact on a reference horizontal plane falls within the projection of the frame-shaped outline surrounded by the first U-shaped yoke 5 on the reference horizontal plane.

[0068] In the high voltage DC relay with permanent magnet arc extinction of the present disclosure, a third permanent magnet 91 is further attached to the surface facing away from the fixed contacts at the two fixed contact draw-out ends 1, and the surface with polarity of the third permanent magnet 91 faces the corresponding contact, and the polarity of the surface of the third permanent magnet 91 facing the contact is opposite to the polarity of the surface of the first permanent magnet 3 facing the contact, so that the first permanent magnet 3 and the third permanent magnet 91 are used to form a vertical magnetic field at the contact point and strengthen the magnetic field strength at the contact point to further realize arc extinction. Such a structure of the present disclosure can improve the vertical arc extinction magnetic field, improve the central magnetic field strength of the draw-out ends, and accelerate the speed of magnetic arc extinction at the moment of arc generation. In the present disclosure, the two movable contacts are protrusions 23 integrally formed at both ends of the movable contact 2, and the protrusions 23 at both ends of the movable contact 2 are eccentrically contacted with the bottom ends of the two fixed contact draw-out ends 1, respectively. Such a structure of the present disclosure can enhance the magnetic field strength at the contact point by cooperation between the longitudinal arc extraction magnetic field and the eccentric contact point, and always direct the Lorentz force at the arc generation point in a direction favorable for arc extinction, thereby improving the arc extinction effect.

[0069] In this embodiment, the magnetic polarity of the surface of the first permanent magnet 3 corresponding to one end of the movable contact 2 facing the contact point is an N pole, and the magnetic polarity of the surface of the first permanent magnet 3 corresponding to the other end of the movable contact 2 facing the contact point is an S pole. Naturally, the magnetic polarity of the surface of the first permanent magnet 3 corresponding to one end of the movable contact 2 facing the contact point is an S pole, and the magnetic polarity of the surface of the first permanent magnet 3 corresponding to the other end of the movable contact 2 facing the contact point is an N pole, and the surfaces of the two first permanent magnets 3 facing the contact points may both be N poles or both be S poles.

[0070] Example 11 As shown in Figures 21 to 23, the high voltage DC relay with permanent magnet arc extinction of the present disclosure differs from Example 10 in that there are four first permanent magnets 3, the four first permanent magnets 3 are respectively arranged on the outside of both sides of the width of the movable contactor 2 and face the corresponding contacts, and the polarities of the faces facing the corresponding contacts of two first permanent magnets 3 corresponding to the same contact are set to be the same.

[0071] In this embodiment, the magnetic polarity of the surfaces facing the contact points of the two first permanent magnets 3 corresponding to one end of the movable contact 2 is both an N pole, the magnetic polarity of the surfaces facing the contact points of the two first permanent magnets 3 corresponding to the other end of the movable contact 2 is both an S pole, the magnetic polarity of the surface facing the contact point of the third permanent magnet 91 corresponding to one end of the movable contact 2 is an S pole, and the magnetic polarity of the surface facing the contact point of the first permanent magnet 3 corresponding to the other end of the movable contact 2 is an N pole.

[0072] In this embodiment, the DC relay further includes two second U-shaped yokes 6 respectively arranged on the four first permanent magnets 3, the U-shaped bottom walls 61 of the two second U-shaped yokes 6 respectively corresponding to the outer sides of both longitudinal ends of the movable contactor 2, and the U-shaped side walls 62 of the two second U-shaped yokes 6 respectively arranged on both sides of the width of the movable contactor 2 and contacting the surfaces facing away from the corresponding contacts of the first permanent magnets 3 at the corresponding positions.

[0073] In this embodiment, the magnetic polarity of the surfaces facing the contact points of the two first permanent magnets 3 corresponding to one end of the movable contact 2 is all N poles, and the magnetic polarity of the surfaces facing the contact points of the two first permanent magnets 3 corresponding to the other end of the movable contact 2 is all S poles. Naturally, the magnetic polarity of the surfaces facing the contact points of the two first permanent magnets 3 corresponding to one end of the movable contact 2 may all be S poles, and the magnetic polarity of the surfaces facing the contact points of the two first permanent magnets 3 corresponding to the other end of the movable contact 2 may all be N poles. Alternatively, the surfaces facing the contact points of the four first permanent magnets 3 may all be N poles or all be S poles.

[0074] In the case where the faces of the four first permanent magnets 3 facing the contact point are all north poles or all south poles, two first permanent magnets 3 on the same side corresponding to the width of the movable contactor 2 can be further connected together to form one.

[0075] The above is merely a preferred embodiment of the present disclosure, and is not intended to limit the present disclosure in any form. The present disclosure discloses preferred embodiments as above, but is not intended to limit the present disclosure. Those skilled in the art can make many possible changes and modifications to the technical solutions of the present disclosure using the technical content disclosed above, without departing from the scope of the technical solutions of the present disclosure, or can modify them into equivalent equivalent embodiments. Therefore, any simple changes, equivalent changes and modifications made to the above embodiments based on the essence of the technology of the present disclosure without departing from the content of the technical solutions of the present disclosure should all fall within the protection scope of the technical solutions of the present disclosure.

[0076] This disclosure claims priority to Chinese patent application having application number 202110807850.2, filed on July 16, 2021, and Chinese patent application having application number 202110220485.5, filed on February 26, 2021, the entire disclosures of which are incorporated herein by reference.

Claims

1. The movable contactor includes two fixed contact pull-out ends and one movable contactor, the movable contactor is disposed below the two fixed contact pull-out ends, and both ends of the movable contactor correspond to the bottom ends of the two fixed contact pull-out ends as movable contacts, respectively; A high voltage DC relay with permanent magnet arc extinction, in which first permanent magnets are arranged around a movable contact in correspondence with contact positions, and a surface having a polarity of the first permanent magnet faces a corresponding contact, thereby realizing arc extinction by utilizing a horizontal magnetic field formed by the first permanent magnets, a second permanent magnet is further attached to a surface facing away from the fixed contacts at each of the two fixed contact lead-out ends, the surface of the second permanent magnet having a polarity facing the corresponding contact, and the polarity of the surface of the second permanent magnet facing the contact is opposite to the polarity of the surface of the first permanent magnet facing the contact, thereby forming a longitudinal magnetic field at the contact location by using the first permanent magnet and the second permanent magnet and strengthening the magnetic field strength at the contact location to further realize arc extinction.

2. 2. The high voltage DC relay with permanent magnet arc-suppression as claimed in claim 1, wherein an upper end of the fixed contact lead-out end is provided with a downwardly recessed groove, the second permanent magnet is fitted into the groove, and the second permanent magnet is brought close to the corresponding contact.

3. 3. The high voltage DC relay with permanent magnet arc-suppression as claimed in claim 2, characterized in that the second permanent magnet is circular, the cross section of the groove has a circular shape corresponding to the second permanent magnet, and the second permanent magnet is located in the middle of the fixed contact lead-out end in the same corresponding horizontal plane.

4. 4. The high voltage DC relay with permanent magnet arc suppression according to claim 3, wherein the two movable contacts are projections integrally formed on both ends of a movable contact.

5. 5. The high voltage DC relay with permanent magnet arc extinguishing as claimed in claim 4, characterized in that there are two first permanent magnets, the two first permanent magnets are respectively arranged outside both ends of the movable contact in the longitudinal direction, and the protrusions on both ends of the movable contact are eccentrically in contact with the bottom ends of the two fixed contact pull-out ends, respectively.

6. 6. The high voltage DC relay with permanent magnet arc extinguishing as claimed in claim 5, characterized in that the protrusions at both ends of the movable contact are provided on both end edges of the movable contact, respectively, and the contact positions between the two fixed contact drawer ends and the protrusions at both ends of the movable contact are located relatively outside the bottom ends of the two fixed contact drawer ends.

7. 7. The high voltage DC relay with permanent magnet arc extinguishing as claimed in claim 6, wherein the bottom end surface of the fixed contact lead end is circular, and the contact position between the fixed contact lead end and the protrusion of the movable contact does not exceed the radius of the circle.

8. 8. The high voltage DC relay with permanent magnet arc extinction as claimed in claim 7, characterized in that the high voltage DC relay further includes two first U-shaped yokes respectively arranged on the two first permanent magnets, the U-shaped bottom walls of the two first U-shaped yokes respectively contact with the surfaces of the corresponding first permanent magnets facing away from the corresponding contacts, and the U-shaped side walls of the two first U-shaped yokes are respectively arranged on both sides in the width direction of the movable contactor and face the corresponding contacts.

9. 9. The high voltage DC relay with permanent magnet arc suppression as claimed in claim 8, characterized in that the projection of the cooperative positions of the movable contact and the fixed contact on a reference horizontal plane is within the projection of a frame-shaped contour surrounded by a first U-shaped yoke on the reference horizontal plane.

10. 5. The high voltage DC relay with permanent magnet arc extinction according to claim 3 or 4, wherein the number of the first permanent magnets is four, the four first permanent magnets are arranged on the outside of both sides in the width direction of the movable contact, respectively, and face the corresponding contacts, and the polarities of the faces facing the corresponding contacts of two first permanent magnets corresponding to the same contact are set to be the same.

11. 11. The high voltage DC relay with permanent magnet arc extinction as claimed in claim 10, characterized in that the high voltage DC relay further includes two second U-shaped yokes respectively arranged on the four first permanent magnets, the U-shaped bottom walls of the two second U-shaped yokes respectively corresponding to the outer sides of both longitudinal ends of the movable contactor, and the U-shaped side walls of the two second U-shaped yokes respectively arranged on both widthwise sides of the movable contactor and contacting the surfaces facing away from the corresponding contacts of the first permanent magnets at the corresponding positions.

12. 2. The high voltage DC relay with permanent magnet arc suppression as claimed in claim 1, wherein the movable contactor corresponds to a middle position of the height of the first permanent magnet.

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