A vacuum interrupter and its arc extinguishing contact

Abstract

The present invention relates to a vacuum arc extinguishing chamber and an arc extinguishing contact thereof. The arc extinguishing contact comprises a conductive rod, a contact piece, and a longitudinal magnetic conductor; a plurality of longitudinal magnetic conductors are provided, and the longitudinal magnetic conductors extend in a circumferential direction of the contact piece in the axial direction of the conductive rod, and each longitudinal magnetic conductor is arranged at intervals in the circumferential direction of the contact piece and has the same rotation direction; the longitudinal magnetic conductor has a conductor contact section for pressing and contacting with the longitudinal magnetic conductors adjacent to the contact piece in the circumferential direction of the conductive rod; the adjacent conductor contact sections on the arc extinguishing contact are in contact when current is flowing, which shortens the flow path, reduces the flow resistance, and improves the flow capacity; when disconnecting, the longitudinal magnetic conductor is reset, and the intervals between adjacent longitudinal magnetic conductors prevent the flow, and the flow path is limited to the extension path of the longitudinal magnetic conductor. Since the longitudinal magnetic conductor extends in a rotational direction, the arc extinguishing contact can ensure the longitudinal magnetic field strength at this time. The arc extinguishing contact of the present invention ensures the longitudinal magnetic field strength and improves the flow capacity by changing the current path.

Description

Technical Field

[0001] The invention relates to a vacuum arc extinguishing chamber and an arc extinguishing contact thereof. Background Art

[0002] Vacuum circuit breakers are currently widely used in the interruption of AC power grids in the medium and low voltage fields. They have the characteristics of high reliability, maintenance-free, and strong interruption capacity. Among them, the vacuum interrupter is the core component that determines whether the vacuum circuit breaker can successfully interrupt the fault current.

[0003] Arcing occurs during the opening and closing of the moving and static contacts of the vacuum interrupter. The metal vapor in the arcing process burns to form an arc. The arc contraction under high current will reduce the recovery strength of the post-arc insulating medium inside the vacuum interrupter, which is not conducive to the opening of the vacuum circuit breaker. At present, the method of improving arc control generally adopts the longitudinal magnetic field control technology. The vacuum arc can be maintained in a diffuse state under the action of the longitudinal magnetic field, reducing the arc ablation of the contact. However, there is a contradiction between the longitudinal magnetic field strength and the rated current carrying capacity of the contact. When the longitudinal magnetic field strength is large, the current path of the contact is long, the resistance is large, and the current carrying capacity is poor. When the current path is short, the current carrying capacity is strong, but the longitudinal magnetic field strength is small. Summary of the invention

[0004] The object of the present invention is to provide an arc extinguishing contact for improving the current carrying capacity under the premise of ensuring the longitudinal magnetic field strength; in addition, the object of the present invention is also to provide a vacuum arc extinguishing chamber for improving the current carrying capacity of the vacuum arc extinguishing chamber.

[0005] The arc extinguishing contact of the present invention adopts the following technical solution:

[0006] Arcing contacts include:

[0007] Conductive rod;

[0008] A contact sheet, used for conducting contact with a matching contact;

[0009] A longitudinal magnetic conductor, used for conducting the conductive rod and the contact piece;

[0010] A plurality of longitudinal magnetic conductors are provided, and the longitudinal magnetic conductors extend in a circumferential direction of the contact piece in the axial direction of the conductive rod, and the longitudinal magnetic conductors are arranged at intervals in the circumferential direction of the contact piece and have the same rotation direction;

[0011] The longitudinal magnetic conductor has a conductor contact section for pressing and contacting with the longitudinal magnetic conductor adjacent to the contact piece in the circumferential direction along the axial direction of the conductive rod;

[0012] The adjacent longitudinal magnetic conductors along the circumferential direction of the contact sheet meet the following requirements: when the arc extinguishing contact and the matching contact are conducting, at least one conductor contact segment on one longitudinal magnetic conductor is pressed and contacted with a conductor contact segment on another longitudinal magnetic conductor in the axial direction of the conductive rod to achieve conduction; when the arc extinguishing contact and the matching contact are disconnected, the longitudinal magnetic conductor is reset, and the conductor contact segments that were in contact when the arc extinguishing contact and the matching contact were conducting are spaced apart in the axial direction of the conductive rod.

[0013] Beneficial effects: The adjacent conductor contact segments on the arc extinguishing contact of the present invention are in contact when current is flowing, which shortens the flow path, reduces the flow resistance, and improves the flow capacity. When disconnected, the longitudinal magnetic conductor is reset, and the interval between adjacent longitudinal magnetic conductors prevents the flow, and the flow path is limited to the extension path of the longitudinal magnetic conductor. Since the longitudinal magnetic conductor rotates and extends, the arc extinguishing contact can ensure the longitudinal magnetic field strength at this time. The arc extinguishing contact of the present invention ensures the longitudinal magnetic field strength and improves the flow capacity by changing the current path.

[0014] Furthermore, the arc extinguishing contact comprises an elastic member, the longitudinal magnetic conductor is reset by the elastic member, and the elastic member is compressed when the arc extinguishing contact and the matching contact are in current flow. The elastic member has a large deformation amount, which is convenient for assembly.

[0015] Furthermore, the elastic member is a spring extending along the axial direction of the conductive rod. The spring has a simple structure and low cost.

[0016] Furthermore, the conductor contact segments on each longitudinal magnetic conductor are divided into at least two groups, and the conductor contact segments in the same group meet the following conditions: each conductor contact segment is arranged in the axial direction of the conductive rod and adjacent conductor contact segments are in tight contact when the arc extinguishing contact and the adapter contact are in current flow, and each conductor contact segment in at least one group of conductor contact segments is provided with an elastic member through-hole, the elastic member extends along the axial direction of the conductive rod, and the elastic member passes through each elastic member through-hole in the same group of conductor contact segments. The elastic member passes through the elastic member through-hole on the conductor contact segment, so that a resetting force can be applied to the position of the conductor contact segment in a more timely manner, and the resetting effect of the longitudinal magnetic conductor is better.

[0017] Furthermore, the conductor contact segments on each longitudinal magnetic conductor are divided into at least two groups, and the conductor contact segments in the same group meet the following conditions: each conductor contact segment is arranged in the axial direction of the conductive rod and adjacent conductor contact segments are in tight contact when the arc extinguishing contact and the adapter contact are in current flow. Multiple groups of conductor contact segments further improve the current flow capacity during normal current flow.

[0018] Furthermore, any two adjacent longitudinal magnetic conductors satisfy the following conditions: the two longitudinal magnetic conductors are defined as a first longitudinal magnetic conductor and a second longitudinal magnetic conductor, and the portion of the conductor contact segment on the first longitudinal magnetic conductor that is arranged along the axial direction of the conductive rod with the conductor contact segment on the second longitudinal magnetic conductor is the conductor contact segment on the first longitudinal magnetic conductor. The conductive rod and the contact piece can be connected through the conductor contact segment, and the current carrying capacity is relatively high.

[0019] Furthermore, at least one end of the longitudinal magnetic conductor is provided with the conductor contact section. The longitudinal magnetic conductor has good stability.

[0020] Furthermore, the longitudinal magnetic conductor is provided with at least two arc segments in the circumferential direction of the contact piece, the conductor contact segment is located on the arc segment, and two adjacent arc segments are arranged in a step shape in the axial direction of the conductive rod. The step shape is conducive to the tight contact of the axially arranged conductor contact segments.

[0021] Further, at least one conductor contact segment is connected to the conductive rod for conductive contact, and at least one conductor contact segment is connected to the contact sheet for conductive contact.

[0022] The technical solution of the vacuum interrupter of the present invention is as follows:

[0023] A vacuum interrupter chamber, comprising a moving contact and a stationary contact, wherein at least one of the moving contact and the stationary contact is an arc-extinguishing contact;

[0024] Arcing contacts include:

[0025] Conductive rod;

[0026] A contact sheet, used for conducting contact with a matching contact;

[0027] A longitudinal magnetic conductor, used for conducting the conductive rod and the contact piece;

[0028] A plurality of longitudinal magnetic conductors are provided, and the longitudinal magnetic conductors extend in a circumferential direction of the contact piece in the axial direction of the conductive rod, and the longitudinal magnetic conductors are arranged at intervals in the circumferential direction of the contact piece and have the same rotation direction;

[0029] The longitudinal magnetic conductor has a conductor contact section for pressing and contacting with the longitudinal magnetic conductor adjacent to the contact piece in the circumferential direction along the axial direction of the conductive rod;

[0030] The adjacent longitudinal magnetic conductors along the circumferential direction of the contact sheet meet the following requirements: when the arc extinguishing contact and the matching contact are conducting, at least one conductor contact segment on one longitudinal magnetic conductor is pressed and contacted with a conductor contact segment on another longitudinal magnetic conductor in the axial direction of the conductive rod to achieve conduction; when the arc extinguishing contact and the matching contact are disconnected, the longitudinal magnetic conductor is reset, and the conductor contact segments that were in contact when the arc extinguishing contact and the matching contact were conducting are spaced apart in the axial direction of the conductive rod.

[0031] Beneficial effects: The adjacent conductor contact segments on the arc extinguishing contact of the present invention are in contact when current is flowing, which shortens the flow path, reduces the flow resistance, and improves the flow capacity. When disconnected, the longitudinal magnetic conductor is reset, and the interval between adjacent longitudinal magnetic conductors prevents the flow, and the flow path is limited to the extension path of the longitudinal magnetic conductor. Since the longitudinal magnetic conductor rotates and extends, the arc extinguishing contact can ensure the longitudinal magnetic field strength at this time. The arc extinguishing contact of the present invention ensures the longitudinal magnetic field strength and improves the flow capacity by changing the current path.

[0032] Furthermore, the arc extinguishing contact comprises an elastic member, the longitudinal magnetic conductor is reset by the elastic member, and the elastic member is compressed when the arc extinguishing contact and the matching contact are in current flow. The elastic member has a large deformation amount, which is convenient for assembly.

[0033] Furthermore, the elastic member is a spring extending along the axial direction of the conductive rod. The spring has a simple structure and low cost.

[0034] Furthermore, the conductor contact segments on each longitudinal magnetic conductor are divided into at least two groups, and the conductor contact segments in the same group meet the following conditions: each conductor contact segment is arranged in the axial direction of the conductive rod and adjacent conductor contact segments are in tight contact when the arc extinguishing contact and the adapter contact are in current flow, and each conductor contact segment in at least one group of conductor contact segments is provided with an elastic member through-hole, the elastic member extends along the axial direction of the conductive rod, and the elastic member passes through each elastic member through-hole in the same group of conductor contact segments. The elastic member passes through the elastic member through-hole on the conductor contact segment, so that a resetting force can be applied to the position of the conductor contact segment in a more timely manner, and the resetting effect of the longitudinal magnetic conductor is better.

[0035] Furthermore, the conductor contact segments on each longitudinal magnetic conductor are divided into at least two groups, and the conductor contact segments in the same group meet the following conditions: each conductor contact segment is arranged in the axial direction of the conductive rod and adjacent conductor contact segments are in tight contact when the arc extinguishing contact and the adapter contact are in current flow. Multiple groups of conductor contact segments further improve the current flow capacity during normal current flow.

[0036] Furthermore, any two adjacent longitudinal magnetic conductors satisfy the following conditions: the two longitudinal magnetic conductors are defined as a first longitudinal magnetic conductor and a second longitudinal magnetic conductor, and the portion of the conductor contact segment on the first longitudinal magnetic conductor that is arranged along the axial direction of the conductive rod with the conductor contact segment on the second longitudinal magnetic conductor is the conductor contact segment on the first longitudinal magnetic conductor. The conductive rod and the contact piece can be connected through the conductor contact segment, and the current carrying capacity is relatively high.

[0037] Furthermore, at least one end of the longitudinal magnetic conductor is provided with the conductor contact section. The longitudinal magnetic conductor has good stability.

[0038] Furthermore, the longitudinal magnetic conductor is provided with at least two arc segments in the circumferential direction of the contact piece, the conductor contact segment is located on the arc segment, and two adjacent arc segments are arranged in a step shape in the axial direction of the conductive rod. The step shape is conducive to the tight contact of the axially arranged conductor contact segments.

[0039] Further, at least one conductor contact segment is connected to the conductive rod for conductive contact, and at least one conductor contact segment is connected to the contact sheet for conductive contact. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a schematic diagram of the structure of the vacuum interrupter in the specific embodiment 1 of the present invention, in which the moving contact and the static contact are in the open state;

[0041] Figure 2It is a cross-sectional view of the moving contact and the stationary contact in the open state in the specific embodiment 1 of the vacuum interrupter of the present invention;

[0042] Figure 3 It is a schematic diagram of the structure of the moving contact and the static contact in the specific embodiment 1 of the vacuum interrupter of the present invention under the current flow state;

[0043] Figure 4 It is a side view of the moving contact and the stationary contact in the current-passing state in the specific embodiment 1 of the vacuum interrupter of the present invention;

[0044] In the figure: 1. moving contact; 2. static contact; 3. conductive rod; 31. rod body; 32. connecting plate; 4. contact piece; 5. longitudinal magnetic conductor; 51. conductor contact section; 511. elastic member perforation; 52. conductor isolation section; 6. elastic member. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical scheme and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention, that is, the embodiments described are only part of the embodiments of the present invention, rather than all of the embodiments. The components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0046] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present invention.

[0047] It should be noted that relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0048] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0049] Specific embodiment 1 of the vacuum interrupter of the present invention:

[0050] like Figures 1 to 4 As shown, the vacuum interrupter includes a housing, a moving contact 1 and a stationary contact 2. In this embodiment, both the moving contact 1 and the stationary contact 2 are arc-extinguishing contacts. The moving contact 1 and the stationary contact 2 move relative to each other in the housing to achieve connection between the two, and move in opposite directions in the housing to achieve disconnection between the two. The structure of the arc-extinguishing contact involved in the present invention is introduced below.

[0051] The arc extinguishing contact of the present invention can generate a larger longitudinal magnetic field when the moving contact 1 and the stationary contact 2 are disconnected, and has a higher current carrying capacity after the moving contact 1 and the stationary contact 2 are connected.

[0052] The arc extinguishing contact includes a conductive rod 3, a contact piece 4 and a longitudinal magnetic conductor 5. The conductive rod 3 includes a rod body 31 and a connecting plate 32, and the connecting plate 32, the contact piece 4 and the longitudinal magnetic conductor 5 form a cup-shaped contact structure. The longitudinal magnetic conductor 5 is in the shape of a long strip, one end of which is connected to the connecting plate 32, and the other end is connected to the contact piece 4. The longitudinal magnetic conductor 5 plays the role of conducting the contact piece 4 and the conductive rod 3. The contact piece 4 of the moving contact 1 is in conductive contact with the contact piece 4 of the static contact 2. The longitudinal magnetic conductor 5 in this embodiment is a copper conductor, and after the contact piece 4 is compressed, the longitudinal magnetic conductor 5 can produce a certain elastic deformation.

[0053] A plurality of longitudinal magnetic conductors 5 are provided, and the longitudinal magnetic conductors 5 extend in a circumferential rotational direction along the contact sheet 4 in the axial direction of the conductive rod 3. The longitudinal magnetic conductors 5 are arranged at intervals along the circumferential direction of the contact sheet 4, and the rotation directions of the longitudinal magnetic conductors 5 are consistent. The longitudinal magnetic conductor 5 has a conductor contact section 51 for pressing and contacting the longitudinal magnetic conductors 5 circumferentially adjacent to the contact sheet 4 along the axial direction of the conductive rod 3, and also has a conductor isolation section 52 for always keeping the longitudinal magnetic conductors 5 circumferentially adjacent to the contact sheet 4 at intervals along the axial direction of the conductive rod 3. The longitudinal magnetic conductors 5 are arranged at intervals in the circumferential direction of the contact sheet 4, and when the moving contact 1 and the static contact 2 are opened, the current blocks the passage and flows through each longitudinal magnetic conductor 5, generating a strong longitudinal magnetic field. In this embodiment, the longitudinal magnetic conductors are machined and formed in one piece. In other embodiments, the conductor can also be formed by welding.

[0054] In order to improve the flow capacity of the longitudinal magnetic conductor 5, the longitudinal magnetic conductors 5 adjacent to each other along the circumference of the contact sheet 4 meet the following conditions: when the arc extinguishing contact and the matching contact are in flow, the conductor contact segment 51 on one longitudinal magnetic conductor 5 and the conductor contact segment 51 on another longitudinal magnetic conductor 5 are pressed and contacted in the axial direction of the conductive rod 3 to be connected; when the arc extinguishing contact and the matching contact are disconnected, the longitudinal magnetic conductor 5 is reset, and the conductor contact segments 51 that are in contact when the arc extinguishing contact and the matching contact are in flow are arranged at intervals in the axial direction of the conductive rod 3. Through the conductive contact between the conductor contact segments 51, the longitudinal magnetic conductors 5 can be connected, the flow path length of the longitudinal magnetic conductor 5 is reduced, the flow resistance is reduced, and the flow capacity is improved. Specifically, in this embodiment, the structure of the longitudinal magnetic conductor 5 is different, and the number and position of the conductor contact segments 51 can be adjusted as needed. The conductor contact segment 51 has a protruding portion protruding along the axial direction of the conductive rod, and the protruding portion is used to contact the adjacent conductor contact segment 51.

[0055] An elastic member 6 is provided between the connection plate 32 and the contact piece 4. In this embodiment, the elastic member 6 is a spring, and the two ends of the spring are fixedly connected to the conductive rod and the conductive piece, respectively. In order to improve the resetting ability of the longitudinal magnetic conductor 5, in this embodiment, an elastic member through hole 511 is provided on the conductor contact segment 51. The elastic member 6 extends axially along the conductive rod, one end is connected to the conductive rod, and the other end is connected to the contact piece 4. The elastic member 6 passes through the elastic member through hole 511. The position of the elastic member 5 coincides with the position of the conductor contact segment 51, so that the axially adjacent conductor contact segments 51 can be disconnected in time.

[0056] In other embodiments, the elastic member can also be made of elastic rubber. When the moving contact 1 and the static contact 2 are conducting, the contact pieces 4 on the moving contact 1 and the static contact 2 press against each other, the longitudinal magnetic conductors 5 on the moving contact 1 and the static contact 2 are deformed, the elastic member 6 is compressed, the conductor contact segments 51 on the adjacent longitudinal magnetic conductors 5 are pressed and contacted to conduct, the conducting contact points of the longitudinal magnetic conductors 5 increase, and the conducting capacity of the moving contact 1 and the static contact 2 is enhanced. When the moving contact 1 and the static contact 2 are disconnected, the longitudinal magnetic conductor 5 is reset by the elastic member 6, and the adjacent longitudinal magnetic conductors 5 are spaced apart. At this time, there is no conduction between the longitudinal magnetic conductors 5. When the current flows along the longitudinal magnetic conductors 5, a strong longitudinal magnetic field can be generated, which is helpful for arc extinguishing.

[0057] In this embodiment, the conductor contact segments 51 are divided into multiple groups, and each group of conductor contact segments 51 is arranged along the circumferential direction. There are three conductor contact segments 51 in the same group, and the three conductor contact segments 51 meet the following conditions: each conductor contact segment 51 is arranged in the axial direction of the conductive rod 3, and adjacent conductor contact segments 51 are in tight contact when the arc extinguishing contact and the matching contact are in current flow. In this embodiment, any two adjacent longitudinal magnetic conductors 5 meet the following conditions: the two longitudinal magnetic conductors 5 are defined as the first longitudinal magnetic conductor and the second longitudinal magnetic conductor, respectively, and the portion of the conductor contact segments 51 on the first longitudinal magnetic conductor and the second longitudinal magnetic conductor arranged along the axial direction of the conductive rod 3 is the conductor contact segment 51 on the first longitudinal magnetic conductor.

[0058] In this embodiment, the number of the elastic members 6 is the same as the number of the groups of the conductor contact segments 51. The elastic member perforations on the same group of conductor contact segments 51 are coaxial, and the elastic member 6 passes through the three conductor contact segments 51 of the same group.

[0059] When the moving contact 1 and the stationary contact 2 are in a normal current flow state, the current passes through each group of conductor contact segments 51 but not through the conductor isolation segment 52, and no longitudinal magnetic field is generated, and the current resistance is greatly reduced. When the moving contact 1 and the stationary contact 2 are disconnected, the conductor contact segment 51 is no longer conductive. At this time, the current passes through the conductor contact segment 51 and the conductor isolation segment 52 on the longitudinal magnetic conductor 5, generating a longitudinal magnetic field.

[0060] In this way, the three axially arranged conductor contact segments 51 conduct electricity between the conductive rod 3 and the contact piece 4 when the moving contact 1 and the stationary contact 2 are closed. Since the conductor contact segments 51 are arranged in a straight line, the current carrying capacity is better.

[0061] One end of the partial longitudinal magnetic conductor 5 is provided with a conductor contact segment 51, and the conductor contact segment 51 is connected to the conductive rod 3 or the contact piece 4. Both ends of the partial longitudinal magnetic conductor 5 are provided with conductor contact segments 51, one of the conductor contact segments 51 at both ends is connected to the conductive rod 3, and the other is connected to the contact piece 4.

[0062] In this embodiment, the longitudinal magnetic conductor 5 is integrally formed, and its two ends are respectively welded to the conductive rod 3 and the contact piece 4. The longitudinal magnetic conductor 5 is provided with three arc segments in the circumferential direction of the contact piece 4, and two adjacent arc segments are arranged in a step-like manner in the axial direction of the conductive rod 3.

[0063] The arc extinguishing contact of the vacuum arc extinguishing chamber of the present invention realizes a significant increase in the rated current capacity of the contact without losing the longitudinal magnetic field during the breaking process. Under the condition of arcing during breaking, the longitudinal magnetic field is enhanced to a certain extent, which is conducive to the breaking of the vacuum arc.

[0064] The conductive path of the arc extinguishing contact of the present invention changes according to the working condition of the contact. In the closed state, the longitudinal magnetic conductor 5 is slightly deformed, shortening the current path, and the resistance is small. At this time, the resistance is similar to that of the flat contact, the contact heating is reduced, and the rated current is increased. In the open state, since there is no contact between the conductors, the current path is extended and the longitudinal magnetic field is greatly increased. The longitudinal magnetic conductor 5 of the present invention fully utilizes the hardness pin of a single copper conductor and has good structural elongation. Under the condition of a small deformation, it does not affect the short-term arc current capacity.

[0065] Specific embodiment 2 of the vacuum interrupter of the present invention, the difference between the vacuum interrupter in this embodiment and the vacuum interrupter in the above embodiment is that the longitudinal magnetic conductor itself is an elastic member in this embodiment, for example, the longitudinal magnetic conductor can be an elastic conductive sheet. At this time, the longitudinal magnetic conductor relies on its own elasticity to reset, and there is no need to set an elastic member. Of course, in other embodiments, when this conductor itself is an elastic conductor, an elastic member can also be added to ensure the reset effect.

[0066] Specific embodiment 3 of the vacuum interrupter of the present invention, the difference between the vacuum interrupter in this embodiment and the vacuum interrupter in the above embodiments is that all the longitudinal magnetic conductors constitute the conductor contact section.

[0067] Specific embodiment 4 of the vacuum arc extinguishing chamber of the present invention, the difference between the vacuum arc extinguishing chamber in this embodiment and the vacuum arc extinguishing chamber in the above embodiments is that, in this embodiment, in the same group of conductor contact segments, two contacting conductor contact segments are staggered with the other two conductor contact segments in the axial direction of the conductive rod.

[0068] Specific embodiment 5 of the vacuum interrupter of the present invention, the difference between the vacuum interrupter in this embodiment and the vacuum interrupter in the above embodiments is that the longitudinal magnetic conductor is spiral.

[0069] Specific embodiment 6 of the vacuum interrupter of the present invention, the difference between the vacuum interrupter in this embodiment and the vacuum interrupter in the above embodiment is that, in this embodiment, the elastic member is arranged in the cup-shaped space surrounded by the longitudinal magnetic conductor. In other embodiments, the number of elastic members can be adjusted as needed, and can be more or less than the number of groups of conductor contact segments.

[0070] A specific embodiment 7 of the vacuum interrupter of the present invention is that the vacuum interrupter in this embodiment is different from the vacuum interrupter in the above embodiments only in that the elastic member is perforated and arranged on the conductor isolation section.

[0071] A specific embodiment of the arc extinguishing contact of the present invention, the structure of the arc extinguishing contact in this embodiment is the same as the structure described in any specific embodiment of the vacuum arc extinguishing chamber mentioned above, and the details are not repeated here.

[0072] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The patent protection scope of the present invention shall be based on the claims. All equivalent structural changes made using the contents of the description and drawings of the present invention should also be included in the protection scope of the present invention.

Claims

1. Arc extinguishing contact, characterized in that: include: Conductive rod; A contact sheet, used for conducting contact with a matching contact; A longitudinal magnetic conductor, used for conducting the conductive rod and the contact piece; A plurality of longitudinal magnetic conductors are provided, and the longitudinal magnetic conductors extend in a circumferential direction of the contact piece in the axial direction of the conductive rod, and the longitudinal magnetic conductors are arranged at intervals in the circumferential direction of the contact piece and have the same rotation direction; The longitudinal magnetic conductor has a conductor contact section for pressing and contacting with the longitudinal magnetic conductors adjacent to the contact piece in the circumferential direction along the axial direction of the conductive rod, and also has a conductor isolation section for always keeping the longitudinal magnetic conductors adjacent to the contact piece in the circumferential direction at a distance along the axial direction of the conductive rod, and the longitudinal magnetic conductor is integrally formed; The longitudinal magnetic conductors adjacent to each other along the circumferential direction of the contact sheet satisfy the following conditions: when the arc extinguishing contact and the matching contact are in current flow, at least one conductor contact segment on one longitudinal magnetic conductor is pressed and contacted with a conductor contact segment on another longitudinal magnetic conductor in the axial direction of the conductive rod to be conductive; when the arc extinguishing contact and the matching contact are disconnected, the longitudinal magnetic conductor is reset, and the conductor contact segments that were in contact when the arc extinguishing contact and the matching contact were in current flow are spaced apart in the axial direction of the conductive rod; the arc extinguishing contact also includes an elastic member, the longitudinal magnetic conductor is reset by means of the elastic member, and the elastic member is compressed when the arc extinguishing contact and the matching contact are in current flow, an elastic member through-hole is provided on the conductor isolation segment, and the elastic member extends axially along the conductive rod and passes through the elastic member through-hole of the conductor isolation segment.

2. The arc extinguishing contact according to claim 1, characterized in that: The elastic member is a spring extending axially along the conductive rod.

3. The arc extinguishing contact according to claim 1, characterized in that: The conductor contact segments on each longitudinal magnetic conductor are divided into at least two groups, and the conductor contact segments in the same group meet the following requirements: each conductor contact segment is arranged in the axial direction of the conductive rod and adjacent conductor contact segments are in tight contact when current flows between the arc extinguishing contact and the adapter contact, and each conductor contact segment in at least one group of conductor contact segments is provided with an elastic member through-hole, the elastic member extends along the axial direction of the conductive rod, and the elastic member passes through each elastic member through-hole in the same group of conductor contact segments.

4. The arc extinguishing contact according to claim 1 or 2, characterized in that: The conductor contact segments on each longitudinal magnetic conductor are divided into at least two groups, and the conductor contact segments in the same group meet the following conditions: each conductor contact segment is arranged in the axial direction of the conductive rod and adjacent conductor contact segments are in tight contact when current flows through the arc extinguishing contact and the matching contact.

5. The arc extinguishing contact according to claim 1 or 2, characterized in that: Any two adjacent longitudinal magnetic conductors satisfy: the two longitudinal magnetic conductors are defined as a first longitudinal magnetic conductor and a second longitudinal magnetic conductor, and the portion of the conductor contact segment on the first longitudinal magnetic conductor that is arranged along the axial direction of the conductive rod and the conductor contact segment on the second longitudinal magnetic conductor is the conductor contact segment on the first longitudinal magnetic conductor.

6. The arc extinguishing contact according to claim 5, characterized in that: At least one end of the longitudinal magnetic conductor is provided with the conductor contact section.

7. The arc extinguishing contact according to claim 1 or 2, characterized in that: The longitudinal magnetic conductor is provided with at least two arc segments in the circumferential direction of the contact piece, the conductor contact segment is located on the arc segment, and two adjacent arc segments are arranged in a step shape in the axial direction of the conductive rod.

8. The arc extinguishing contact according to claim 1 or 2, characterized in that: At least one conductor contact section is connected to the conductive rod in conductive contact, and at least one conductor contact section is connected to the contact sheet in conductive contact.

9. A vacuum interrupter, comprising a moving contact and a stationary contact, characterized in that: At least one of the moving contact and the stationary contact is the arc extinguishing contact as described in any one of claims 1-8.

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