CN216957857U

CN216957857U - Circuit breaker isolating switch with limiting structure

Info

Publication number: CN216957857U
Application number: CN202220350805.9U
Authority: CN
Inventors: 廖长寿
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-02-21
Filing date: 2022-02-21
Publication date: 2022-07-12
Anticipated expiration: 2032-02-21

Abstract

The utility model discloses a circuit breaker isolating switch with a limiting structure, which comprises a rack, a rotating shaft arranged on the rack, an isolating crank arm in linkage connection with the rotating shaft, a moving contact arranged on the isolating crank arm, and a grounding contact and a closing contact which are arranged on the rack and matched with the moving contact; install in the frame and keep apart stationary contact seat, the combined floodgate contact is installed on keeping apart stationary contact seat, keeps apart the turning arm and includes left pole and right pole, is connected with limit structure through coupling assembling between left pole and the right pole, limit structure includes connecting portion and spacing portion, and connecting portion clamp is established between left pole and right pole, and the both sides of spacing portion are equipped with the support flange that is used for supporting on left pole and right pole respectively, keep apart and are equipped with the spacing protruding muscle that plays limiting displacement to limit structure on the stationary contact seat. The utility model can ensure that the moving contact and the closing contact are accurately matched, and can play a role in protecting parts, thereby ensuring the safe operation of equipment and the reliability of power supply.

Description

Circuit breaker isolating switch with limiting structure

Technical Field

The utility model relates to the technical field of circuit breaker isolating switches, in particular to a circuit breaker isolating switch with a limiting structure.

Background

The existing circuit breaker isolating switch generally comprises a rack, a rotating shaft arranged on the rack, an isolating crank arm which can rotate after being driven by the rotating shaft, a moving contact arranged on the isolating crank arm, and a grounding contact and a closing contact which are arranged on the rack and can be matched with the moving contact; according to the fact that the circuit breaker isolating switch has three working stations of switching-on and switching-off, isolating and disconnecting and grounding switching-on, a movable contact can switch and rotate between a grounding contact and an isolating contact, and the following problems still exist in the existing circuit breaker isolating switch in practical application: when the moving contact is matched with the closing contact, due to the factors of assembly precision and the structure of the moving contact, the condition that the closing is not in place often occurs, even the moving contact and the closing contact are impacted, so that the damage of parts is caused, and the safe operation of equipment and the reliability of power supply are influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a circuit breaker isolating switch with a limiting structure, which can ensure that a moving contact and a closing contact are accurately matched and can play a role in protecting parts, thereby ensuring the safe operation of equipment and the reliability of power supply.

In order to achieve the purpose, the utility model provides the following technical scheme: a breaker disconnecting switch with a limiting structure comprises a rack, a rotating shaft arranged on the rack, an isolating connecting lever in linkage connection with the rotating shaft, a moving contact arranged on the isolating connecting lever, and a grounding contact and a closing contact which are arranged on the rack and matched with the moving contact; the isolation static contact seat is installed on the rack, the closing contact is installed on the isolation static contact seat, the isolation connecting lever comprises a left rod and a right rod, a limiting structure is connected between the left rod and the right rod through a connecting assembly, the limiting structure comprises a connecting portion and a limiting portion, the connecting portion is clamped between the left rod and the right rod, the limiting portion is arranged at one end, close to the isolation static contact seat, of the connecting portion, supporting flanges used for abutting against the left rod and the right rod are arranged on two sides of the limiting portion respectively, and a limiting convex rib for limiting the limiting structure is arranged on the isolation static contact seat.

Through adopting above-mentioned technical scheme, the rotation axis drives the rotation of isolation turning arm and when making the moving contact and closing contact cooperation, limit structure on the isolation turning arm can play limiting displacement earlier, in the time of closing operation promptly, limit structure's spacing portion supports on the spacing protruding muscle of keeping apart the stationary contact seat, thereby play limiting displacement to the isolation turning arm, make moving contact and the accurate cooperation of closing contact, and simultaneously, because the both sides of the spacing portion of limit structure have support flange of supporting on left pole and right pole, the steadiness of limit structure installation has been promoted, avoid it frequent use and take place the off tracking, it is thus visible, this structure can guarantee that the moving contact realizes accurate cooperation with closing contact, and can play the effect of protection spare part, thereby the safe operation of equipment and the reliability of power supply have been guaranteed.

The utility model is further provided that the connecting part, the limiting part and the supporting flange are of an integrated structure, and the limiting structure is made of elastic materials.

Through adopting above-mentioned technical scheme, not only processing is convenient, can play the buffering effect moreover, can reduce the touching noise, can play the effect of protection spare part again.

The utility model is further provided that the lower end of the limiting part is also provided with an extending flange.

Through adopting above-mentioned technical scheme, extend the effect that the flange can play the power of unloading, receive huge reaction force and take place to bounce back when avoiding limit structure's spacing portion striking to keep apart the spacing muscle of stationary contact seat.

The utility model is further arranged that one side of the limiting part close to the isolation stationary contact seat is provided with a guide inclined plane.

Through adopting above-mentioned technical scheme, the direction inclined plane can play the effect of stepping down, does benefit to the cooperation of spacing portion and spacing protruding muscle simultaneously.

The utility model is further arranged in that the connecting assembly comprises an inner hexagonal screw, a sleeve with a shoulder, an expansion shaft sleeve and a positioning shaft sleeve, the left rod and the right rod are respectively provided with a left hole and a right hole, the left hole and the right hole are coaxially arranged, the inner hexagonal screw and the sleeve with the shoulder respectively penetrate through the left hole and the right hole, the inner hexagonal screw is in threaded connection with the sleeve with the shoulder, the expansion shaft sleeve is arranged on the periphery of the inner hexagonal screw in a sleeved mode, the outer diameter of the expansion shaft sleeve is equivalent to that of the sleeve with the shoulder, the positioning shaft sleeve is arranged between the left rod and the right rod, the positioning shaft sleeve is arranged on the periphery of the expansion shaft sleeve and the sleeve with the shoulder in a sleeved mode, and the connecting portion is provided with a through hole for the positioning shaft sleeve to penetrate through.

Through adopting above-mentioned technical scheme, can realize limit structure and the firm connection of keeping apart the connecting lever to the dismouting is very convenient, does benefit to the maintenance operation in equipment and the later stage in earlier stage.

The utility model is further set that a first circular groove is arranged on the outer side of the left rod, a first gasket and a first reed are sleeved on the inner hexagonal screw, one end of the first reed is propped against the inner end face of the first circular groove, and the other end of the first reed is propped against the inner end face of the first gasket; the outer side of the right rod is provided with a second circular groove, the sleeve with the shoulder is sleeved with a second gasket and a second reed, one end of the second reed is abutted to the inner end face of the second circular groove, and the other end of the second reed is abutted to the inner end face of the second gasket.

Through adopting above-mentioned technical scheme, the pretightning force that the reed provided plays the effect of anticreep, can further promote coupling assembling structure's stability.

The utility model is further arranged in that the switching-on contact is provided with a connecting end, the connecting end is covered by the isolation stationary contact seat, and the outer end of the connecting end is provided with a connecting hole for installing a lead.

Through adopting above-mentioned technical scheme, this structure can not only promote the fastness of combined floodgate contact installation, has made things convenient for the connection operation of wire moreover greatly.

The utility model is further arranged in such a way that the rotating shaft is connected with an insulating sheath in a linkage way, a shielding cover is inserted in the insulating sheath, the shielding cover is sleeved on the periphery of the isolation crank arm, and the lower end of the connecting part extends into the shielding cover and is abutted against the inner wall of the shielding cover.

Through adopting above-mentioned technical scheme, the shield cover can not only the even electromagnetic distribution, improves insulating level, can further promote the fastness of turning arm and limit structure installation moreover, and then promote the stability of its motion in-process.

The utility model is further provided that the outer wall of the insulating sheath is provided with a reinforcing convex rib.

Through adopting above-mentioned technical scheme, can promote insulating sheath's bulk strength, and then promote its life.

Drawings

FIG. 1 is a schematic structural view of the present invention as a whole;

FIG. 2 is a schematic structural view of a position limiting structure according to the present invention;

FIG. 3 is a schematic view of the mounting structure of the position limiting structure of the present invention;

FIG. 4 is a schematic view of an installation structure of a closing contact according to the present invention;

FIG. 5 is a schematic structural view of a closing contact according to the present invention;

fig. 6 is a schematic view of the structure of the shield and the isolating crank arm of the present invention.

In the figure: 1. a frame; 2. a rotating shaft; 3. isolating the crank arm; 4. a moving contact; 5. a ground contact; 6. a closing contact; 7. isolating the stationary contact seat; 8. a left lever; 9. a right lever; 10. a connecting assembly; 11. a limiting structure; 12. a connecting portion; 13. a limiting part; 14. a support flange; 15. limiting convex ribs; 16. an extension flange; 17. a guide slope; 18. a hexagon socket head cap screw; 19. a shouldered bushing; 20. expanding the shaft sleeve; 21. positioning the shaft sleeve; 22. a left hole; 23. a right hole; 24. a through hole; 25. a first circular groove; 26. a first gasket; 27. a first reed; 28. a second circular groove; 29. a second gasket; 30. a second reed; 31. a connecting end; 32. connecting holes; 33. an insulating sheath; 34. a shield case; 35. and reinforcing the convex ribs.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example (b): the circuit breaker disconnecting switch with the limiting structure as shown in the attached figures 1-6 comprises a rack 1, a rotating shaft 2 installed on the rack 1, an isolating crank arm 3 in linkage connection with the rotating shaft 2, a moving contact 4 arranged on the isolating crank arm 3, a grounding contact 5 and a closing contact 6 which are installed on the rack 1 and matched with the moving contact 4; install in the frame 1 and keep apart stationary contact seat 7, combined floodgate contact 6 is installed on keeping apart stationary contact seat 7, it includes left pole 8 and right pole 9 to keep apart connecting lever 3, be connected with limit structure 11 through coupling assembling 10 between left pole 8 and the right pole 9, limit structure 11 includes connecting portion 12 and spacing portion 13, connecting portion 12 press from both sides and establish between left pole 8 and right pole 9, spacing portion 13 sets up the one end that is close to on connecting portion 12 and keeps apart stationary contact seat 7 to the both sides of spacing portion 13 are equipped with respectively and are used for supporting flange 14 on left pole 8 and right pole 9, it is right to keep apart to be equipped with on the stationary contact seat 7 spacing structure 11 plays limiting displacement's spacing protruding muscle 15. Rotation axis 2 drives and keeps apart the turning arm 3 rotatory and when making moving contact 4 and closing contact 6 cooperate, spacing structure 11 on keeping apart turning arm 3 can play limiting displacement earlier, in the time of closing operation promptly, spacing portion 13 of spacing structure 11 supports on keeping apart spacing protruding muscle 15 of stationary contact seat 7, thereby play limiting displacement to keeping apart turning arm 3, make moving contact 4 and the accurate cooperation of closing contact 6, and simultaneously, because the both sides of spacing structure 11 spacing portion 13 have support flange 14 of supporting on left pole 8 and right pole 9, the steadiness of spacing structure 11 installation has been promoted, avoid its frequent use and take place the off tracking, it is thus visible, this structure can guarantee that moving contact 4 and closing contact 6 realize accurate cooperation, and can play the effect of protecting the spare part, thereby the safe operation of equipment and the reliability of power supply have been guaranteed.

The connecting portion 12, the limiting portion 13 and the supporting flange 14 are of an integrated structure, and the limiting structure 11 is made of an elastic material. The design is convenient to process, can play a buffering effect, can reduce touch noise, and can play a role in protecting parts.

Wherein, the lower end of the limiting part 13 is also provided with an extending flange 16. The extending flange 16 can play a role in force unloading, and prevent the limit part 13 of the limit structure 11 from rebounding due to huge reaction force when impacting the limit rib of the isolation static contact seat 7.

As shown in fig. 2, a guiding inclined surface 17 is provided on one side of the limiting portion 13 close to the isolating static contact block 7. The guide inclined plane 17 can play a role of abdicating and is beneficial to the matching of the limiting part 13 and the limiting convex rib 15.

As shown in fig. 3, the connection assembly 10 includes a hexagon socket head cap screw 18, a shouldered sleeve 19, an expansion shaft sleeve 20 and a positioning shaft sleeve 21, the left rod 8 and the right rod 9 are respectively provided with a left hole 22 and a right hole 23, the left hole 22 and the right hole 23 are coaxially disposed, the hexagon socket head cap screw 18 and the shouldered sleeve 19 respectively penetrate through the left hole 22 and the right hole 23, and the hexagon socket head cap screw 18 is in threaded connection with the shouldered sleeve 19, when the hexagon socket head cap screw 18 and the shouldered sleeve 19 are screwed, the screw head of the hexagon socket head cap screw 18 abuts against the outer side of the left rod 8, the shoulder of the shouldered sleeve 19 abuts against the outer side of the right rod 9, the expansion shaft sleeve 20 is sleeved on the periphery of the hexagon socket head cap screw 18, the outer diameter of the expansion shaft sleeve 20 is equivalent to the outer diameter of the shouldered sleeve 19, the positioning shaft sleeve 21 is disposed between the left rod 8 and the right rod 9, and the positioning shaft sleeve 21 is sleeved on the peripheries of the expansion shaft sleeve 20 and the shouldered sleeve 19, the connection portion 12 is provided with a through hole 24 for the positioning shaft sleeve 21 to pass through, when mounted, the left and right rods 8, 9 clamp the joint 12 therebetween. This design can realize limit structure 11 and isolation connecting lever 3's firm connection to the dismouting is very convenient, does benefit to the equipment of earlier stage and the maintenance operation in later stage.

As shown in fig. 3, a first circular groove 25 is formed on the outer side of the left rod 8, a first washer 26 and a first spring 27 are sleeved on the hexagon socket screw 18, one end of the first spring 27 abuts against the inner end face of the first circular groove 25, and the other end of the first spring 27 abuts against the inner end face of the first washer 26; a second circular groove 28 is formed in the outer side of the right rod 9, a second gasket 29 and a second spring plate 30 are sleeved on the sleeve 19 with the shoulder, one end of the second spring plate 30 abuts against the inner end face of the second circular groove 28, and the other end of the second spring plate 30 abuts against the inner end face of the second gasket 29. The pretightning force that the reed provided plays the effect of anticreep, can further promote the stability of coupling assembling 10 structure.

As shown in fig. 4 and fig. 5, a connection end 31 is provided on the closing contact 6, the connection end 31 is covered by the isolation stationary contact base 7, and a connection hole 32 for installing a wire is provided at an outer end of the connection end 31. The structure can not only improve the installation firmness of the closing contact 6, but also greatly facilitate the connection operation of the lead.

As shown in fig. 1 and fig. 6, the rotating shaft 2 is connected in a linkage manner (spline connection can be adopted) to form an insulating sheath 33, a shielding cover 34 is inserted into the insulating sheath 33, the shielding cover 34 is sleeved on the periphery of the isolation crank arm 3, and the lower end of the connecting part 12 extends into the shielding cover 34 and abuts against the inner wall of the shielding cover 34. The shielding cover 34 can not only be uniformly distributed electromagnetically, improve the insulation level, but also further improve the firmness of the installation of the crank arm and the limiting structure 11, and further improve the stability of the motion process.

As shown in fig. 1, the outer wall of the insulating sheath 33 is provided with a reinforcing rib 35. This design can promote insulating sheath 33's bulk strength, and then promotes its life.

Claims

1. A circuit breaker disconnecting switch with a limiting structure comprises a rack (1), a rotating shaft (2) arranged on the rack (1), an isolating connecting lever (3) in linkage connection with the rotating shaft (2), a moving contact (4) arranged on the isolating connecting lever (3), and a grounding contact (5) and a closing contact (6) which are arranged on the rack (1) and matched with the moving contact (4); the method is characterized in that: an isolation stationary contact seat (7) is arranged on the frame (1), the closing contact (6) is arranged on the isolation stationary contact seat (7), the isolation crank arm (3) comprises a left rod (8) and a right rod (9), a limiting structure (11) is connected between the left rod (8) and the right rod (9) through a connecting component (10), the limiting structure (11) comprises a connecting part (12) and a limiting part (13), the connecting part (12) is clamped between the left rod (8) and the right rod (9), the limiting part (13) is arranged at one end of the connecting part (12) close to the isolating static contact seat (7), and two sides of the limiting part (13) are respectively provided with a supporting flange (14) which is used for being propped against the left rod (8) and the right rod (9), and the isolation static contact seat (7) is provided with a limiting convex rib (15) which plays a limiting role in the limiting structure (11).

2. The disconnector with limit structure of claim 1, wherein: the connecting part (12), the limiting part (13) and the supporting flange (14) are of an integrated structure, and the limiting structure (11) is made of elastic materials.

3. The disconnector with circuit breaker of claim 1, wherein: the lower end of the limiting part (13) is also provided with an extending flange (16).

4. The disconnector with limit structure of claim 1, wherein: one side of the limiting part (13) close to the isolation static contact seat (7) is provided with a guide inclined plane (17).

5. The disconnector with limit structure of claim 1, wherein: the connecting assembly (10) comprises an inner hexagonal screw (18), a sleeve with a shoulder (19), an expansion shaft sleeve (20) and a positioning shaft sleeve (21), the left rod (8) and the right rod (9) are respectively provided with a left hole (22) and a right hole (23), the left hole (22) and the right hole (23) are coaxially arranged, the inner hexagonal screw (18) and the sleeve with the shoulder (19) respectively penetrate through the left hole (22) and the right hole (23), the inner hexagonal screw (18) is in threaded connection with the sleeve with the shoulder (19), the expansion shaft sleeve (20) is sleeved on the periphery of the inner hexagonal screw (18), the outer diameter of the expansion shaft sleeve (20) is equivalent to that of the sleeve with the shoulder (19), the positioning shaft sleeve (21) is arranged between the left rod (8) and the right rod (9), and the positioning shaft sleeve (21) is sleeved on the peripheries of the expansion shaft sleeve (20) and the sleeve with the shoulder (19), the connecting part (12) is provided with a through hole (24) for the positioning shaft sleeve (21) to pass through.

6. The disconnector with limit structure of claim 5, wherein: a first circular groove (25) is formed in the outer side of the left rod (8), a first gasket (26) and a first reed (27) are sleeved on the inner hexagonal screw (18), one end of the first reed (27) abuts against the inner end face of the first circular groove (25), and the other end of the first reed (27) abuts against the inner end face of the first gasket (26); the outer side of the right rod (9) is provided with a second circular groove (28), the sleeve (19) with the shoulder is sleeved with a second gasket (29) and a second reed (30), one end of the second reed (30) is abutted to the inner end face of the second circular groove (28), and the other end of the second reed (30) is abutted to the inner end face of the second gasket (29).

7. The disconnector with limit structure of claim 1, wherein: the switching-on contact (6) is provided with a connecting end (31), the connecting end (31) is wrapped by the isolation static contact seat (7), and the outer end of the connecting end (31) is provided with a connecting hole (32) for installing a wire.

8. The disconnector with limit structure of claim 1, wherein: rotation axis (2) are gone up the linkage and are connected with insulating sheath (33), it has shield cover (34) to peg graft in insulating sheath (33), shield cover (34) cover is established keep apart turning arm (3) periphery, the lower extreme of connecting portion (12) stretches into in shield cover (34) and offsets with shield cover (34) inner wall.

9. The disconnector with limit structure of claim 8, wherein: and a reinforcing convex rib (35) is arranged on the outer wall of the insulating sheath (33).