Circuit breaker

Abstract

The invention belongs to the field of electrical equipment, particularly relates to a circuit breaker, and provides a circuit breaker in order to solve the technical problem that in the prior art, when solid-sealed polar poles of different specifications are replaced, sealing flange plates need to be replaced synchronously, and consequently the solid-sealed polar poles are troublesome to replace. Comprising a solid-sealed polar pole, an operating mechanism and a sealing flange plate located between the solid-sealed polar pole and the operating mechanism, a partition piece is arranged between the sealing flange plate and the solid-sealed polar pole, and a solid-sealed polar pole flange is indirectly fixed to the sealing flange plate through the partition piece. A first connecting structure used for being detachably connected with the sealing flange plate and a second connecting structure used for being detachably connected with the solid-sealed polar pole flange are arranged on the partition piece. According to the utility model, through the arrangement of the partition piece, the solid-sealed polar poles with different specifications can be replaced by replacing the partition piece, and the sealing flange plate does not need to be replaced, so that the operation of replacing the solid-sealed polar poles becomes simple, and the time is saved.

Description

Technical Field

[0001] The invention belongs to the field of electrical equipment, and in particular relates to a circuit breaker. Background Art

[0002] In high-voltage disconnecting equipment, the circuit breaker is the core component. The circuit breaker is installed in a metal cabinet, and the circuit breaker operating mechanism controls the opening and closing of the circuit breaker. In existing inflatable switchgear, due to space and structural limitations, the main conductive part of the circuit breaker needs to be fixedly arranged in the switch cabinet gas box, and the main conductive part and the operating mechanism are separated by a sealing flange plate. The main conductive part is located inside the gas box, and the operating mechanism is located outside the gas box. The operating mechanism controls the movement of the moving contact through a bellows and an insulating pull rod.

[0003] A Chinese invention patent with authorization announcement number CN 111312554 B and authorization announcement date 2022.12.30 discloses a vacuum circuit breaker, including a sealed pole and an operating mechanism. The sealed pole and the operating mechanism are fixedly connected by a sealing flange plate located between the sealed pole and the operating mechanism. The operating mechanism includes a connecting rod for controlling the movement of a moving contact. A bellows and an insulating pull rod connected to the moving contact are provided in the sealed pole. The bellows is fixedly connected to the insulating pull rod through the connecting rod.

[0004] In the above-mentioned vacuum circuit breaker, the sealed pole is fixedly connected to the sealing flange plate by connecting flanges and bolts. When it is desired to replace the sealed pole with a different specification, the position of the threaded holes on the sealing flange plate is fixed, resulting in the mismatch between the specification of the sealing flange plate and the specification of the sealed pole. Therefore, it is necessary to replace a different sealing flange plate, and the sealing flange plate needs to seal the gas box where the sealed pole is located. However, it is more troublesome to use the sealing flange plate to seal the gas box, which leads to the technical problem of more troublesome replacement of the sealed pole. Summary of the invention

[0005] The object of the present invention is to provide a circuit breaker to solve the technical problem in the prior art that when replacing sealed poles of different specifications, it is necessary to simultaneously replace the sealing flange plate, which makes the replacement of the sealed poles more troublesome.

[0006] To achieve the above-mentioned purpose, the technical solution of the circuit breaker operating mechanism provided by the present invention is:

[0007] A circuit breaker comprises a sealed pole, an operating mechanism and a sealing flange plate located between the sealed pole and the operating mechanism, a partition is provided between the sealing flange plate and the sealed pole, the sealed pole flange is indirectly fixed to the sealing flange plate through the partition, and a first connecting structure for detachably connecting to the sealing flange plate and a second connecting structure for detachably connecting to the sealed pole flange are provided on the partition.

[0008] The beneficial effect is as follows: the present invention is an improved invention. By setting up a partition, it is possible to replace the sealed poles of different specifications by replacing the partition without replacing the sealing flange plate. Compared with the technical solution in the background technology that requires replacing the sealing flange plate, since the partition is arranged inside the inflation box, when the partition is installed on the sealing flange plate, it is not necessary to pay special attention to the sealing problem of the sealing flange plate, thereby making the operation of replacing the sealed pole simple and saving time.

[0009] Furthermore, the partition member is provided with an open space communicating with the outside; or at least two partition members are provided, and at least two partition members are arranged at intervals to enclose an open space together with the sealed pole flange and the sealing flange plate.

[0010] The beneficial effect is that, compared with a cylindrical partition, the volume and mass of the partition can be reduced by providing an open space, thereby saving costs.

[0011] Furthermore, the circuit breaker also includes a bellows, which includes a connecting shaft. The circuit breaker also includes an insulating pull rod that is transmission-connected to the moving end of the sealed pole. One of the insulating pull rod and the connecting shaft is provided with a threaded rod, and the other is provided with a threaded hole that cooperates with the threaded rod. The threaded rod is also connected to a locking nut for locking the insulating pull rod and the connecting shaft after they are connected in place. The open space is used to expose the locking nut for adjusting it.

[0012] The beneficial effects are as follows: the locking nut is tightly attached to the bellows or insulating rod with a threaded hole, and the locking nut is located in an open space. On the one hand, the locking nut and the threaded hole can form a double locking nut locking structure to avoid relative sliding of the bellows and the insulating rod when the moving contact of the circuit breaker moves; on the other hand, the locking nut, the threaded rod and the bellows or insulating rod to which the locking nut is tightly attached also form a screw locking nut mechanism. By extending the tool into the open space and moving the locking nut toward the bellows or insulating rod to which the locking nut is tightly attached, the spacing between the insulating rod and the bellows can be adjusted, thereby adjusting the position of the moving contact connected to the insulating rod, so that the position of the moving contact meets the requirements of the circuit breaker.

[0013] Furthermore, a groove communicating with the open space is provided on the sealed pole flange, and the size of the groove is larger than the size of the locking nut so that the locking nut is completely exposed.

[0014] The beneficial effect is that by arranging the groove on the sealed pole, the volume of the open space can be increased, making it easier to extend the tool to the locking nut and use the tool to rotate the locking nut.

[0015] Furthermore, at least two partition members are provided, and each partition member is evenly distributed along the circumference of the sealed pole flange.

[0016] The beneficial effect is that by evenly arranging the spacers, the sealed poles can be better supported.

[0017] Furthermore, the partition member is a pad.

[0018] The beneficial effect is that compared with partition members such as brackets, the pad has a simple structure and high strength.

[0019] Furthermore, the pad is a rectangular plate.

[0020] The beneficial effect is that the rectangular plate is a non-special-shaped plate and is easy to process.

[0021] Furthermore, the first connection structure is a bolt through hole for the bolt to pass through.

[0022] The beneficial effect is that by setting the first connection structure as a bolt through hole, it is convenient to detachably connect the partition member and the sealing flange.

[0023] Furthermore, the second connection structure is a screw hole for connecting with a screw thread.

[0024] The beneficial effect is that by setting the second connection structure as a screw hole, it is convenient to detachably connect the partition piece to the sealed pole flange.

[0025] Furthermore, the circuit breaker also includes a gas-filled box, the sealed pole is located in the gas-filled box, and the sealing flange plate is a side plate of the gas-filled box.

[0026] The beneficial effect is that by setting the sealing flange plate as the side plate of the inflation box, the structure of the circuit breaker can be made more compact, and the sealing flange plate can be omitted, thereby reducing the workload. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic structural diagram of a specific embodiment 1 of a circuit breaker of the present invention;

[0028] Figure 2 This is a schematic structural diagram of a cushion block in a specific embodiment 1 of a circuit breaker of the present invention;

[0029] Figure 3 It is a partial enlarged view of the connection between the corrugated tube and the insulating pull rod in the specific embodiment 1 of the circuit breaker of the present invention;

[0030] Figure 4 It is a front view of the bellows in the specific embodiment 1 of the circuit breaker of the present invention;

[0031] Figure 5 It is a schematic diagram of the structure of the bellows in the specific embodiment 1 of the circuit breaker of the present invention.

[0032] Description of reference numerals:

[0033] 1. Operating mechanism; 2. Sealing flange plate; 3. Sealed pole; 4. Gasket; 5. Bellows; 51. Threaded hole; 52. Connecting shaft; 6. Insulating pull rod; 7. Locking nut. DETAILED DESCRIPTION

[0034] The present invention is further described in detail below in conjunction with embodiments.

[0035] Specific embodiment 1 of the circuit breaker provided by the present invention:

[0036] The purpose of this embodiment is to provide a circuit breaker that mounts a sealed pole on a sealing flange plate through a gasket. By setting the gasket, when replacing sealed poles of different specifications, only the corresponding gasket needs to be replaced without replacing the sealing flange plate. At the same time, the gasket is located in the inflation box and does not need to be sealed and connected to the inflation box. It is more convenient to install and disassemble than the sealing flange plate, so the workload when replacing sealed poles of different specifications can be reduced.

[0037] like Figure 1-5 As shown, this embodiment provides a circuit breaker, including an operating mechanism 1, an air-filled box, a sealed pole 3, a bellows 5, an insulating pull rod 6, a locking nut 7 and a sealing flange plate 2 for sealing the air-filled box. The sealing flange plate is a side plate of the air-filled box. By setting the sealing flange plate as the side plate of the air-filled box, the structure of the circuit breaker can be made more compact, and the sealing flange plate can also be installed without installing the sealing flange plate, thereby reducing the workload. The sealing flange plate 2 is connected to the operating mechanism 1 on one side outside the air-filled box, and a sealed pole flange is provided on the sealed pole 3. A partition is detachably installed on one side of the sealing flange plate 2 located inside the air-filled box. In this embodiment, the partition is a gasket 4 threadedly connected to the sealing flange plate 2. The gasket 4 is provided with a first connection structure for detachably connecting to the sealing flange plate and a second connection structure for detachably connecting to the sealed pole flange. The first connection structure is a bolt through hole for the bolt to pass through, and the second connection structure is a screw hole for matching with the screw thread. The sealed pole 3 is installed on the side of the gasket 4 away from the sealing flange plate 2.

[0038] By providing a partition, it is possible to replace the sealed poles 3 of different specifications by replacing the partition without replacing the sealing flange plate 2. Compared with the technical solution in the background technology that requires replacement of the sealing flange plate 2, since the partition is provided inside the inflation box, when installing the partition on the sealing flange plate 2, there is no need to pay special attention to the sealing problem of the sealing flange plate 2, thereby simplifying the operation of replacing the sealed pole 3 and saving time; compared with the additional provision of a bracket, the gasket 4 has a simple structure, high strength and is easy to disassemble and install; compared with the provision of a slot on the sealing flange plate 2, the gasket 4 can be conveniently installed on or removed from the sealing flange plate 2 through a threaded connection.

[0039] In this embodiment, in order to save costs, the gasket 4 is set as two rectangular plates, and the gaskets 4 are evenly spaced around the flange of the sealed pole 3, and the sealing flange plate 2, the gasket 4 and the sealed pole 3 enclose an open space.

[0040] Relative to a cylindrical gasket 4, by setting the number of gaskets 4 to two and making the sealing flange plate 2, the gasket 4 and the sealed pole 3 enclose an open space, the volume and mass of the gasket 4 can be reduced, thereby saving costs; by arranging the gaskets 4 at intervals, the sealed pole 3 can be better supported.

[0041] In this embodiment, in order to facilitate the adjustment of the distance between the bellows 5 and the insulating rod 6, the bellows 5 also includes a connecting shaft, a threaded hole 51 is provided on the connecting shaft, a threaded rod corresponding to the threaded hole 51 is provided on the insulating rod 6, the bellows 5 and the insulating rod 6 are threadedly connected through the threaded hole 51 and the threaded rod, the locking nut 7 is threadedly connected to the threaded rod and is located between the bellows 5 and the insulating rod 6, and the locking nut 7 is tightly attached to the bellows 5 provided with the threaded hole 51, the locking nut 7 is located in the open space, and the open space is used for tools to screw the locking nut. A groove for leaking the locking nut 7 is provided on the sealed pole 3, and the size of the groove is larger than the size of the locking nut 7, so as to completely expose the locking nut 7.

[0042] The locking nut 7 is tightly attached to the bellows 5 provided with a threaded hole 51, and the locking nut 7 is located in the open space. On the one hand, the locking nut 7 forms a locking structure to prevent the bellows 5 and the insulating rod 6 from moving relative to each other when the moving contact of the circuit breaker moves, thereby ensuring the connection effect between the bellows 5 and the insulating rod 6; on the other hand, the locking nut 7, the threaded rod and the bellows 5 tightly attached to the locking nut 7 also form a screw locking nut 7 mechanism. By extending the tool into the open space and rotating the locking nut 7 tightly against the bellows 5, the insulating rod 6 can produce a direct motion, thereby adjusting the distance between the insulating rod 6 and the bellows 5; by arranging a groove on the sealed pole 3, the volume of the open space can be increased, making it easier to extend the tool to the locking nut 7 and use the tool to rotate the locking nut 7.

[0043] In actual production, since the bellows 5 and the insulating rod 6 are not produced by the same manufacturer, the sizes of the bellows 5 and the insulating rod 6 may not correspond. By setting the locking nut 7, on the one hand, the distance between the bellows 5 and the insulating rod 6 can be adjusted, thereby adjusting the position of the moving contact connected to the insulating rod 6 so that the position of the moving contact meets the requirements of the circuit breaker; on the other hand, the locking nut 7 forms a locking structure to prevent the bellows 5 and the insulating rod 6 from moving relative to each other when the moving contact of the circuit breaker moves.

[0044] Specific embodiment 2 of the circuit breaker provided by the present invention:

[0045] The purpose of this embodiment is to provide a different partitioning member. The main difference between this embodiment and specific embodiment 1 is that in this embodiment, the partitioning member is a completely solid partitioning member and does not include an open space.

[0046] Specific embodiment 3 of the circuit breaker provided by the present invention:

[0047] The purpose of this embodiment is to provide a different setting method of a threaded rod and a threaded hole. The main difference between this embodiment and specific embodiment 1 is that: in this embodiment, a threaded hole is provided on the insulating pull rod, and a threaded rod corresponding to the threaded hole is provided on the connecting shaft of the bellows, and the bellows and the insulating pull rod are threadedly connected through the threaded hole and the threaded rod.

[0048] Specific embodiment 4 of the circuit breaker provided by the present invention:

[0049] The purpose of this embodiment is to provide a different connection method between a bellows and an insulating rod. The main difference between this embodiment and specific embodiment 1 is that in this embodiment, there is no locking nut between the bellows and the insulating rod, and the bellows and the insulating rod are bonded together. At this time, there is no open space on the pad and no groove is set on the sealed pole.

[0050] Specific embodiment 5 of the circuit breaker provided by the present invention:

[0051] The purpose of this embodiment is to provide a different sealed pole. The main difference between this embodiment and specific embodiment 1 is that in this embodiment, no groove is provided on the sealed pole, and only the open space formed by the partition is used to operate the locking nut.

[0052] Specific embodiment 6 of the circuit breaker provided by the present invention:

[0053] The purpose of this embodiment is to provide a different setting method for spacers. The main difference between this embodiment and specific embodiment 1 is that in this embodiment, there are at least three spacers, and most of the spacers are arranged on one side of the sealed pole flange, so that there are fewer spacers on the other side. When using a tool to rotate the locking nut, the locking nut can be rotated from the side with fewer spacers, thereby facilitating the rotation of the locking nut.

[0054] Specific embodiment 7 of the circuit breaker provided by the present invention:

[0055] The purpose of this embodiment is to provide a different partition member. The main difference between this embodiment and specific embodiment 1 is that in this embodiment, the partition member is a cube bracket, and the four top corners of the bracket are provided with screw holes for connecting to the flange of the sealed pole.

[0056] Specific embodiment 8 of the circuit breaker provided by the present invention:

[0057] The purpose of this embodiment is to provide a different pad. The main difference between this embodiment and specific embodiment 1 is that in this embodiment, the pad is a "C"-shaped plate, and the opening naturally formed in the "C"-shaped plate is for the tool to extend into.

[0058] Specific embodiment 9 of the circuit breaker provided by the present invention:

[0059] The purpose of this embodiment is to provide a different first connection structure. The main difference between this embodiment and specific embodiment 1 is that in this embodiment, a clamping block is provided on the sealing flange plate, a clamping groove is provided on the pad plate, and the pad plate is clamped on the sealing flange plate.

[0060] Specific embodiment 10 of the circuit breaker provided by the present invention:

[0061] The purpose of this embodiment is to provide another different first connection structure. The main difference between this embodiment and specific embodiment 1 is that in this embodiment, the first connection structure is a welding stud, which is provided with a through hole on the sealing flange plate for the welding stud to pass through the sealing flange plate, and then connected with a nut to realize a detachable connection between the sealing flange plate and the gasket.

[0062] Specific embodiment 11 of the circuit breaker provided by the present invention:

[0063] The purpose of this embodiment is to provide a different second connection structure. The main difference between this embodiment and specific embodiment 1 is that in this embodiment, the second connection structure is a welding stud, which is passed through the flange of the sealed pole and then fixed with a nut to achieve a detachable connection between the gasket and the sealed pole.

[0064] Specific embodiment 12 of the circuit breaker provided by the present invention:

[0065] The purpose of this embodiment is to provide a different sealing flange plate. The main difference between this embodiment and specific embodiment 1 is that in this embodiment, the sealing flange plate does not constitute the side panel of the inflatable box. The inflatable box itself has a side panel, and the sealing flange plate is installed on the side panel of the inflatable box.

[0066] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions recorded in the aforementioned embodiments without creative work, or replace some of the technical features therein with equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A circuit breaker, comprising a sealed pole, an operating mechanism and a sealing flange plate located between the sealed pole and the operating mechanism, characterized in that: A partition is provided between the sealing flange plate and the sealed pole, and the sealed pole flange is indirectly fixed to the sealing flange plate through the partition. The partition is provided with a first connection structure for detachably connecting to the sealing flange plate and a second connection structure for detachably connecting to the sealed pole flange.

2. The circuit breaker according to claim 1, characterized in that The partition member is provided with an open space communicating with the outside; or at least two partition members are provided, and at least two partition members are arranged at intervals to enclose an open space together with the sealed pole flange and the sealing flange plate.

3. The circuit breaker according to claim 2, characterized in that The circuit breaker also includes a bellows, which includes a connecting shaft. The circuit breaker also includes an insulating pull rod that is transmission-connected to the moving end of the sealed pole. One of the insulating pull rod and the connecting shaft is provided with a threaded rod, and the other is provided with a threaded hole that cooperates with the threaded rod. The threaded rod is also connected to a locking nut that is used to lock the insulating pull rod and the connecting shaft after they are connected in place. The open space is used to expose the locking nut so that it can be adjusted.

4. The circuit breaker according to claim 3, characterized in that A groove communicating with the open space is arranged on the sealed pole flange, and the size of the groove is larger than the size of the locking nut so that the locking nut is completely exposed.

5. The circuit breaker according to any one of claims 2 to 4, characterized in that: At least two spacers are provided, and each spacer is evenly distributed along the circumference of the sealed pole flange.

6. The circuit breaker according to any one of claims 1 to 4, characterized in that: The spacer is a pad.

7. The circuit breaker according to claim 6, characterized in that The pad is a rectangular plate.

8. The circuit breaker according to any one of claims 1 to 4, characterized in that: The first connection structure is a bolt through hole for the bolt to pass through.

9. The circuit breaker according to any one of claims 1 to 4, characterized in that: The second connection structure is a screw hole for connecting with the screw thread.

10. The circuit breaker according to any one of claims 1 to 4, characterized in that: The circuit breaker also includes a gas-filled box, the sealed pole is located in the gas-filled box, and the sealing flange plate is a side plate of the gas-filled box.

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