CN118448213A

CN118448213A - High-voltage direct-current relay with auxiliary double contacts

Info

Publication number: CN118448213A
Application number: CN202410818217.7A
Authority: CN
Inventors: 汪小燕; 汪纯燕
Original assignee: Zhejiang Jinghao Optoelectronics Technology Co ltd
Current assignee: Zhejiang Jinghao Optoelectronics Technology Co ltd
Priority date: 2024-06-24
Filing date: 2024-06-24
Publication date: 2024-08-06

Abstract

The invention relates to the technical field of relays, in particular to a high-voltage direct current relay with auxiliary double contacts, which comprises a relay main body part, wherein the relay main body part comprises a shell, a top cover is fixedly arranged at the top of the shell, bolts are in threaded connection with the left side and the right side of the top cover, a coil control wire is fixedly arranged at the top of the rear side of the shell, switch contacts are fixedly arranged on the left side and the right side of the top of the shell, and two static contacts are symmetrically and fixedly arranged on the top wall of the shell.

Description

High-voltage direct-current relay with auxiliary double contacts

Technical Field

The invention relates to the technical field of relays, in particular to a high-voltage direct-current relay with auxiliary double contacts.

Background

The high-voltage relay is an electronic control device, and is provided with an input loop and an output loop, is generally applied to an automatic control circuit, is now used for a high-voltage direct-current relay in the new energy industry, and along with the development of the new energy industry, the requirement on the relay is higher and higher, and two groups of main contact loops are required to be arranged in a single product, so that two groups of loads can be switched simultaneously.

At present, an anti-adhesion high-voltage relay is disclosed in patent publication No. CN114496660B, wherein a stationary contact is arranged on a ceramic cover, a tip is arranged in a groove at the bottom end of the stationary contact, a floating contact is arranged in a containing cavity of a movable contact, a contact spring supports the floating contact to enable the floating contact to protrude out of the surface of the movable contact, and the floating contact is made of conductive high-temperature-resistant materials and is different from the stationary contact and the movable contact in material; an upper push rod, a lower push rod, a buffer spring and a return spring are arranged below the movable contact; the bottom of the lower push rod is provided with an iron core, the iron core is wrapped in a metal shell, and the coil is arranged on the periphery of the metal shell. By arranging the tip structure on the stationary contact, the electric arc at the end of the stationary contact can be led out from the tip under the condition that the electric arc is generated between the electric contacts, so that the ablation of the main contact surface of the stationary contact is avoided; meanwhile, in the pre-off or pre-on state, the elastic structure of the floating contact and the high-temperature resistant heterogeneous material are utilized to prevent the adhesion of the movable contact and the static contact, ensure the load operation performance of the high-voltage relay and greatly prolong the service life of the high-voltage relay;

In addition, have disclosed a high-voltage relay that insulating property is good in patent bulletin number "CN215578359U", belong to high-voltage relay equipment technical field, including the relay main part, the upper end fixedly connected with two electrode sheetmetals of relay main part, the front and back both sides of relay main part all overlap and are equipped with relay insulating housing, two arc holes have all been seted up to two relay insulating housing's upper end, four arc holes respectively with two electrode sheetmetal assorts, two electrode sheet insulating housings of equal fixedly connected with of upper end of two relay insulating housing, four electrode sheet insulating housings respectively with two electrode sheetmetal assorts downside of relay main part is provided with fixed establishment, the left and right sides of relay main part all is provided with stop gear, finally can realize preventing that the user from taking place electric shock after contacting the high-voltage relay, the insulating sleeve is dismantled in the installation of being convenient for, the convenience is overhauld high-voltage relay.

In summary, the following defects exist in combination with the above-mentioned comparison document, and after comparing with the prior art, the following defects are specifically included:

1. after the high-voltage relay is arranged in the equipment, when the equipment is bumpy to a large extent, the connection part of the lead and the relay contact may be separated and in poor contact, so that current cannot normally circulate, the relay cannot normally work, and thus the functions of related systems or equipment are disabled, such as an automobile lighting system, a driving motor control and the like, an arc phenomenon may be generated, the high temperature and energy generated by the arc may damage the relay pins, the contacts and surrounding elements, and even fire or other safety problems are caused;

2. When equipment jolts, can lead to sealing failure between the stationary contact of relay and the pottery owing to external force collision, and then lead to the inside inert gas that fills of pottery to take place to leak, this moment electric contact loses the isolation protection, and then lead to the production of electric arc, the high temperature and the energy that electric arc produced probably damage other components inside electric contact and the relay, influence reliability and the life-span of relay, the inside gas tightness of relay can reduce in addition, the reduction of gas tightness can lead to outside moisture, dust or other impurity to get into inside the relay, influence the normal operating of relay, and increase the risk of the inside component of relay corruption and damage.

Therefore, the invention provides a high-voltage direct-current relay with auxiliary double contacts, which overcomes and improves the defects of the prior art.

Disclosure of Invention

Aiming at the defects existing in the prior art, the invention provides a high-voltage direct-current relay with auxiliary double contacts, which can effectively solve the technical problem of potential safety hazards generated during the use of the relay.

In order to achieve the above purpose, the invention is realized by the following technical scheme:

The invention discloses a high-voltage direct current relay with auxiliary double contacts, which comprises a relay main body part, wherein the relay main body part comprises a shell, a top cover is fixedly arranged at the top of the shell, bolts are connected with the left side and the right side of the top cover in a threaded manner, a coil control wire is fixedly arranged at the top of the rear side of the shell, switch contacts are fixedly arranged at the left side and the right side of the top of the shell, two fixed contacts are symmetrically and fixedly arranged on the top wall of the shell, an arc extinguishing chamber is fixedly arranged in the shell, a movable contact is connected in the arc extinguishing chamber in a sliding manner, the switch contacts are electrically connected with the fixed contacts, the bottom of the fixed contacts is positioned in the arc extinguishing chamber, and the movable contact is matched and attached with the two fixed contacts;

the inside of explosion chamber is provided with sealing mechanism, the top of top cap is provided with stabilizing mean, stabilizing mean's inside is provided with coil mechanism.

Preferably, the sealing mechanism comprises a storage airbag fixedly mounted on the top wall of the arc extinguish chamber, a guide rail is fixedly mounted on the side wall of the arc extinguish chamber, a ball body is connected to the inner portion of the guide rail in a sliding mode, a spring is fixedly mounted between the ball body and the guide rail, a pushing block is fixedly mounted on one end of the ball body, away from the spring, of the ball body, a supporting plate is fixedly mounted on the bottom of the guide rail, a buffer airbag is arranged on the upper surface of the supporting plate, and the upper end face of the buffer airbag is communicated with a ventilation pipe.

Preferably, the bottom wall of the guide rail is provided with a sliding groove, the bottom of the sphere is fixedly provided with a sliding block which is in sliding connection with the sliding groove in an adapting mode, and the sphere is kept to slide horizontally in the guide rail.

Preferably, the pushing block is matched with the storage air bag, the storage air bag is pressed when the pushing block moves, the storage air bag is attached to the joint of the supporting plate and the buffer air bag, the air in the storage air bag is discharged after being pressed, and the storage air bag is tightly attached to the joint of the static contact and the arc extinguishing chamber.

Preferably, the two vent pipes are arranged, one end of the two vent pipes, which is far away from the buffer air bag, is communicated with the interior of the storage air bag, and the two vent pipe openings face the interior of the storage air bag and the buffer air bag respectively.

Preferably, the stabilizing mechanism comprises a fixed disc fixedly mounted at the top of the top cover, the top of the fixed disc is rotationally connected with a swinging rod, the surface of the swinging rod is rotationally connected with a telescopic rod, the top end of the swinging rod is fixedly provided with a pushing rod, one end of the pushing rod, far away from the swinging rod, is rotationally connected with a rotating ring, the bottom of the rotating ring is slidably connected with a supporting rod, the inner wall of the rotating ring is slidably connected with the rotating disc, the top of the rotating disc is fixedly provided with a convex rod, the surface of the convex rod is rotationally connected with a connecting rod, the top of the switch contact is fixedly provided with a fixed ring, and the inner sliding of the fixed ring is connected with a butt block.

Preferably, the swing rod is circumferentially distributed at the top of the fixed disc, the bottom end of the telescopic rod is rotationally connected to the top of the fixed disc, the bottom end of the supporting rod is fixedly arranged at the top of the switch contact, the bottom of the rotating ring is provided with an annular groove, the top end of the supporting rod is slidingly connected to the inside of the annular groove, the bottom end of the rotating disc is rotationally connected with a bent rod, one end of the bent rod, far away from the rotating disc, is fixedly arranged on the surface of the supporting rod, and the rotating ring is pushed to rotate when the swing rod swings.

Preferably, the protruding rod is eccentrically and fixedly connected to the top surface of the rotating disc, one end, away from the protruding rod, of the connecting rod is rotationally connected to the surface of the abutting block, and the connecting rod is pushed by the rotating disc to push the abutting block to move towards the inner part of the fixing ring when the rotating disc rotates.

Preferably, the coiling mechanism comprises a coiling groove formed in the outer wall of the fixed disc, a notch is formed in the top of the fixed disc, fixing blocks are fixedly arranged on the upper side and the lower side of the inner wall of the coiling groove, an arc plate is fixedly arranged on the similar ends of the fixing blocks, a spring body is fixedly arranged in the arc plate, which is close to one side of the coiling groove, and a pressing block is fixedly arranged at one end, which is far away from the arc plate, of the spring body.

Preferably, the notch is communicated with the coiling groove, the arc center of the arc plate faces to one side far away from the inside of the coiling groove, and the arc plate can limit the wires placed in the inside of the coiling groove.

Compared with the known public technology, the technical scheme provided by the invention has the following beneficial effects:

1. The invention utilizes the abutting block to limit the lead, so that the lead can be stably connected to the inside of the switch contact, at the moment, the relay can keep normal work, the phenomenon that relevant equipment of the relay cannot be used due to poor contact is avoided, the stable operation and reliability of the relay are ensured, in addition, the phenomenon of arc generated due to poor contact is avoided, the probability of circuit fault is reduced, and the stability of the circuit is improved.

2. According to the invention, the storage airbag is tightly attached to the joint of the stationary contact and the arc-extinguishing chamber when the vehicle jolts, so that inert gas leakage in the arc-extinguishing chamber is avoided, current can normally flow, the relay can normally use, in addition, an electric arc and an insulation circuit can be effectively isolated, the reliability of the relay is improved, and the normal work and the service life of the relay are ensured.

3. The invention can coil longer wires inside the coil groove, reduces electromagnetic coupling between the wires, is beneficial to improving electromagnetic compatibility, reduces electromagnetic interference and faults, and can provide better physical protection by coiling the wires of the relay together so as to reduce the influence of mechanical damage and external environmental factors on the wires.

Drawings

The invention is further described with respect to embodiments illustrated by means of the following drawings, in which:

FIG. 1 is a front perspective view of the present invention;

FIG. 2 is a perspective view of the present invention in a cut-away state;

FIG. 3 is an enlarged perspective view of the structure of FIG. 2A according to the present invention;

FIG. 4 is a top cross-sectional perspective view of the stationary contact of the present invention;

FIG. 5 is an enlarged perspective view of the structure of FIG. 4B according to the present invention;

FIG. 6 is a partial perspective view of the seal mechanism of the present invention;

FIG. 7 is a partial perspective view of the stabilizing mechanism of the present invention;

FIG. 8 is a side cross-sectional perspective view of the structure of FIG. 7 in accordance with the present invention;

FIG. 9 is an enlarged perspective view of the structure of FIG. 8 at C in accordance with the present invention;

Fig. 10 is an enlarged perspective view of the structure of fig. 8 at D according to the present invention.

Reference numerals in the drawings represent respectively:

1. A relay body member; 11. a housing; 12. a top cover; 13. a bolt; 14. a coil control line; 15. a switch contact; 16. a stationary contact; 17. an arc extinguishing chamber; 18. a movable contact;

2. A sealing mechanism; 21. storing the air bag; 22. a guide rail; 23. a sphere; 24. a spring; 25. a pushing block; 26. a support plate; 27. a buffer air bag; 28. a vent pipe;

3. A stabilizing mechanism; 301. a fixed plate; 302. swing rod; 303. a telescopic rod; 304. a push rod; 305. a rotating ring; 306. a support rod; 307. a rotating disc; 308. a protruding rod; 309. a connecting rod; 310. a fixing ring; 311. an abutment block;

4. a coiling mechanism; 41. a coiling groove; 42. a notch; 43. a fixed block; 44. an arc-shaped plate; 45. a spring body; 46. and (5) briquetting.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It will be apparent that the described embodiments are some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

The invention is further described below with reference to examples.

Embodiments of the invention: referring to fig. 1 to 2, a high-voltage direct current relay with auxiliary double contacts comprises a relay main body part 1, wherein the relay main body part 1 comprises a shell 11, a top cover 12 is fixedly arranged at the top of the shell 11, bolts 13 are connected to the left side and the right side of the top cover 12 in a threaded manner, a coil control wire 14 is fixedly arranged at the top of the rear side of the shell 11, switch contacts 15 are fixedly arranged at the left side and the right side of the top of the shell 11, two fixed contacts 16 are symmetrically and fixedly arranged on the top wall of the shell 11, an arc extinguishing chamber 17 is fixedly arranged in the shell 11, a movable contact 18 is connected in the arc extinguishing chamber 17 in a sliding manner, the switch contacts 15 are electrically connected with the fixed contacts 16, the bottom of the fixed contacts 16 is positioned in the arc extinguishing chamber 17, and the movable contact 18 is matched and attached with the two fixed contacts 16;

Referring to fig. 1, a sealing mechanism 2 is provided inside an arc extinguishing chamber 17, a stabilizing mechanism 3 is provided at the top of a top cover 12, and a coiling mechanism 4 is provided inside the stabilizing mechanism 3.

In view of the above, a high voltage dc relay with auxiliary double contacts may be implemented as follows:

Referring to fig. 3 to 6, the sealing mechanism 2 includes a storage airbag 21 fixedly installed on the top wall of the arc extinguishing chamber 17, a guide rail 22 is fixedly installed on the side wall of the arc extinguishing chamber 17, a ball 23 is slidably connected to the inside of the guide rail 22, a sliding groove is formed in the bottom wall of the guide rail 22, a sliding block which is slidably connected to the sliding groove is fixedly installed at the bottom of the ball 23, the ball 23 is horizontally slid in the guide rail 22, a spring 24 is fixedly installed between the ball 23 and the guide rail 22, a push block 25 is fixedly installed at one end of the ball 23 far away from the spring 24, a support plate 26 is fixedly installed at the bottom of the guide rail 22, a buffer airbag 27 is arranged on the upper surface of the support plate 26, the push block 25 is matched with the storage airbag 21, the storage airbag 21 is pressed when the push block 25 moves, the storage airbag 21 is matched with the junction of the fixed contact 16 and the arc extinguishing chamber 17, gas in the storage airbag 21 is discharged after being pressed, at this moment, the storage airbag 21 is closely matched with the junction of the support plate 26 and the buffer airbag 27, the upper end face of the buffer airbag 27 is communicated with a ventilation pipe 28, one end of the two ventilation pipes 28 far away from the buffer airbag 27 and the inside of the storage airbag 21 are communicated with the inside opening 28 of the buffer airbag 21, and the inside of the two ventilation pipes 28 are respectively facing the buffer airbag 21.

Referring to fig. 7 to 9, the stabilizing mechanism 3 includes a fixed disk 301 fixedly mounted on the top of the top cover 12, the top of the fixed disk 301 is rotationally connected with a swinging rod 302, the surface of the swinging rod 302 is rotationally connected with a telescopic rod 303, the top of the swinging rod 302 is fixedly mounted with a push rod 304, one end of the push rod 304, which is far away from the swinging rod 302, is rotationally connected with a rotating ring 305, the bottom of the rotating ring 305 is slidingly connected with a supporting rod 306, the inner wall of the rotating ring 305 is slidingly connected with a rotating disk 307, the swinging rod 302 is circumferentially distributed on the top of the fixed disk 301, the bottom of the telescopic rod 303 is rotationally connected with the top of the fixed disk 301, the bottom of the supporting rod 306 is fixedly mounted on the top of the switch contact 15, the bottom of the rotating ring 305 is provided with an annular groove, the top of the supporting rod 306 is slidingly connected with an annular groove, the bottom of the rotating disk 307 is rotationally connected with a curved rod, one end, which is fixedly mounted on the surface of the supporting rod 306, when the swinging rod 302 swings, the top of the rotating disk 307 is fixedly mounted with a convex rod 308, the top of the convex rod 308 is rotationally connected with a connecting rod 309, the top of the rotating ring 310 is fixedly connected with a connecting rod 309, the inner sliding block 311, and the top of the connecting rod 309 is pushed against the inner surface of the rotating rod 309 when the convex rod is in a sliding connection with the inner side of the rotating rod 309.

Referring to fig. 10, the coiling mechanism 4 includes a coiling groove 41 formed in an outer wall of the fixing disc 301, a notch 42 is formed in the top of the fixing disc 301, fixing blocks 43 are fixedly mounted on the upper side and the lower side of the inner wall of the coiling groove 41, an arc plate 44 is fixedly mounted on the similar ends of the two fixing blocks 43, the notch 42 is communicated with the coiling groove 41, the arc center of the arc plate 44 faces to one side far away from the inside of the coiling groove 41, the arc plate 44 can limit a wire placed in the coiling groove 41, a spring body 45 is fixedly mounted in the inside of the arc plate 44, and a pressing block 46 is fixedly mounted at one end of the spring body 45 far away from the arc plate 44.

The complete working principle of the above embodiment is as follows:

Firstly, the top cover 12 is fixed in the vehicle through the bolt 13, the top of the coil control wire 14 is electrically connected with the coil, the wire connected with an external power supply is inserted into the switch contact 15, if the wire is longer, the wire can be coiled in the coiling groove 41, one end of the wire passes through the notch 42 and is separated from the coiling groove 41, at the moment, the pressing block 46 is abutted to the surface of the wire under the action of the spring body 45, the wire is prevented from being directly placed outside the shell 11, the electromagnetic coupling between the wires is reduced, the electromagnetic compatibility is improved, the electromagnetic interference and faults are reduced, and in addition, the wire of the relay is coiled together to provide better physical protection, and the influence of mechanical damage and external environmental factors on the wire is reduced.

When the shell 11 bumps, the ball 23 slides in the guide rail 22 under the action of gravity, and because the sliding block slides in the sliding groove, the ball 23 can only slide in the guide rail 22 and cannot be separated from the guide rail 22, if the guide rail 22 moves to compress the spring 24, then the ball 23 can drive the push block 25 to move to press the storage airbag 21 under the action of resilience of the spring 24, if the ball 23 moves to stretch the spring 24, then the ball 23 can directly drive the push block 25 to press the storage airbag 21, when the storage airbag 21 is pressed, air in the storage airbag 21 enters the buffer airbag 27 through the vent pipe 28, and then the air in the storage airbag 21 is reduced, and then the surface of the storage airbag 21 is acted by the action of external atmospheric pressure, so that a large pressure difference is generated between the surface of the storage airbag 21 and the surrounding environment, and the junction of the static contact 16 and the arc extinguishing chamber 17 can generate a fitting effect, namely, when the storage airbag 21 is adsorbed at the junction of the static contact 16, inert gas leakage in the arc extinguishing chamber 17 is avoided in the process of bumping the shell 11, the current can be used, the relay can be used, the normal electric arc can be effectively circulated, the normal electric arc can be effectively isolated, and the normal service life of the relay can be ensured, and the normal service life of the electric circuit can be ensured.

When the shell 11 jolts, the swinging rod 302 swings, at this time, the swinging rod 302 pushes the push rod 304, so that the push rod 304 pushes the rotating ring 305 to rotate at the top of the supporting rod 306, when the rotating ring 305 rotates, the rotating disc 307 can be pushed to rotate due to friction force between the rotating ring 305 and the rotating disc 307, the rotating disc 307 can drive the protruding rod 308 to rotate, the protruding rod 308 continuously approaches the abutting block 311 along with the rotation of the rotating disc 307, at this time, the protruding rod 308 can push the connecting rod 309 to rotate, so that the connecting rod 309 pushes the abutting block 311 to move in the direction away from the rotating disc 307 in the fixed ring 310 until the abutting block 311 limits wires mounted in the switch contacts 15, the wires are prevented from being separated from the switch contacts 15, the situation of poor contact is further avoided, at this time, the relay can keep normal working, the relay related equipment can not be used due to poor contact, stable operation and reliability of the relay are ensured, the phenomenon due to poor contact is avoided, the occurrence of arc fault probability of the circuit is reduced, and the stability of the circuit is improved.

The above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. The utility model provides a take supplementary high voltage direct current relay of double contact, includes relay main part (1), relay main part (1) include casing (11), the top fixed mounting of casing (11) has top cap (12), the equal threaded connection in the left and right sides at top cap (12) top has bolt (13), the top fixed mounting of casing (11) rear side has coil control line (14), the equal fixed mounting in the left and right sides at casing (11) top has switch contact (15), the roof symmetry fixed mounting of casing (11) has two stationary contacts (16), the inside fixed mounting of casing (11) has explosion chamber (17), the inside sliding connection of explosion chamber (17) has movable contact (18), its characterized in that: the switch contacts (15) are electrically connected with the fixed contacts (16), the bottoms of the fixed contacts (16) are positioned in the arc extinguishing chamber (17), and the movable contacts (18) are matched and attached with the two fixed contacts (16);

The inside of explosion chamber (17) is provided with sealing mechanism (2), the top of top cap (12) is provided with stabilizing mean (3), the inside of stabilizing mean (3) is provided with coil mechanism (4).

2. A high voltage dc relay with auxiliary double contacts as claimed in claim 1, wherein: sealing mechanism (2) are including fixed mounting in the storage gasbag (21) of explosion chamber (17) roof, the lateral wall fixed mounting of explosion chamber (17) has guide rail (22), the inside sliding connection of guide rail (22) has spheroid (23), fixed mounting has spring (24) between spheroid (23) and guide rail (22), the one end fixed mounting that spring (24) was kept away from to spheroid (23) has ejector pad (25), the bottom surface fixed mounting of guide rail (22) has backup pad (26), the upper surface of backup pad (26) is provided with buffer gasbag (27), the up end intercommunication of buffer gasbag (27) has breather pipe (28).

3. A high voltage dc relay with auxiliary double contacts as claimed in claim 2, wherein: the bottom wall of the guide rail (22) is provided with a sliding groove, and the bottom of the sphere (23) is fixedly provided with a sliding block which is in sliding connection with the sliding groove in an adapting way.

4. A high voltage dc relay with auxiliary double contacts as claimed in claim 2, wherein: the pushing block (25) is matched with the storage air bag (21), and the storage air bag (21) is attached to the joint of the stationary contact (16) and the arc extinguishing chamber (17).

5. A high voltage dc relay with auxiliary double contacts as claimed in claim 2, wherein: the two vent pipes (28) are arranged, one ends of the two vent pipes (28) away from the buffer air bag (27) are communicated with the inside of the storage air bag (21), and the openings of the two vent pipes (28) face the inside of the storage air bag (21) and the buffer air bag (27) respectively.

6. A high voltage dc relay with auxiliary double contacts as claimed in claim 1, wherein: the stabilizing mechanism (3) comprises a fixed disc (301) fixedly mounted on the top of the top cover (12), the upper end face of the fixed disc (301) is rotationally connected with a swing rod (302), the surface of the swing rod (302) is rotationally connected with a telescopic rod (303), the top end of the swing rod (302) is fixedly provided with a push rod (304), one end of the push rod (304) away from the swing rod (302) is rotationally connected with a rotating ring (305), the bottom of the rotating ring (305) is slidingly connected with a supporting rod (306), the inner wall of the rotating ring (305) is slidingly connected with a rotating disc (307), the top of the rotating disc (307) is fixedly provided with a protruding rod (308), the surface of the protruding rod (308) is rotationally connected with a connecting rod (309), the top of the switch contact (15) is fixedly provided with a fixed ring (310), and the inner part of the fixed ring (310) is slidingly connected with a butt block (311).

7. A high voltage dc relay with auxiliary double contacts as defined in claim 6, wherein: the swing rod (302) circumference distributes in the up end of fixed disk (301), the bottom rotation of telescopic link (303) is connected in the top of fixed disk (301), the bottom fixed mounting of branch (306) is in the up end of switch contact (15), the ring channel has been seted up to the bottom surface of swivel becket (305), the top sliding connection of branch (306) is in the inside of ring channel, the bottom rotation of rotating disk (307) is connected with the bent rod, and the one end fixed mounting in the surface of branch (306) of rotating disk (307) is kept away from to the bent rod.

8. A high voltage dc relay with auxiliary double contacts as defined in claim 6, wherein: the protruding rod (308) is eccentrically and fixedly connected to the top surface of the rotating disc (307), and one end, away from the protruding rod (308), of the connecting rod (309) is rotatably connected to the surface of the abutting block (311).

9. A high voltage dc relay with auxiliary double contacts as defined in claim 6, wherein: the coiling mechanism (4) comprises a coiling groove (41) formed in the outer wall of the fixed disc (301), a notch (42) is formed in the top of the fixed disc (301), fixing blocks (43) are fixedly installed on the upper side and the lower side of the inner wall of the coiling groove (41), arc plates (44) are fixedly installed on the surfaces, close to one side, of the fixing blocks (43) respectively, the arc plates (44) are fixedly installed with spring bodies (45) close to the inner portion of one side of the coiling groove (41), and pressing blocks (46) are fixedly installed at one ends, far away from the arc plates (44), of the spring bodies (45).

10. A high voltage dc relay with auxiliary double contacts as claimed in claim 9, wherein: the notch (42) is communicated with the coiling groove (41), and the arc center of the arc plate (44) faces to one side far away from the inside of the coiling groove (41).