Circuit breaker switch for 24kV circuit breaker switch cabinet

Abstract

The utility model discloses a circuit breaker switch for a 24kV circuit breaker switch cabinet, which comprises a vacuum switch and an isolating switch, the vacuum switch comprises a vacuum arc-extinguishing chamber, the isolating switch comprises an isolating switch static contact, the isolating switch static contact is lapped at the static end of the vacuum arc-extinguishing chamber through a connecting device, the connecting device comprises a pressing rod and a contact support, and the pressing rod is in lap joint with the contact support. The compression bar is in threaded connection with the contact support, the compression bar is movably connected with the contact support, and the static contact and the static end of the disconnecting switch are kept in a lap joint state and the fixed height of the vacuum arc-extinguishing chamber is adjusted through the movement of the compression bar, so that the height of the compression bar can be adjusted in the vertical direction, and the fixed height of the vacuum arc-extinguishing chamber is further adjusted; the pressure of the moving contact at the moving end of the three-phase vacuum arc-extinguishing chamber and the wear compensation over-travel of the moving contact are adjusted, so that the lapping effectiveness of the contact within the allowable wear extent range of the contact is ensured.

Description

TECHNICAL FIELD

[0001] The utility model belongs to electrical technical field relates to a kind of circuit breaker switch for 24kV circuit breaker switch cabinet. BACKGROUND

[0002] Vacuum circuit breaker as a more typical switch structure, usually by using vacuum interrupter as the main component of the main component of the current switching vacuum switch and direct-acting or knife switch type disconnecting switch combination.

[0003] The existing sulfur hexafluoride 24kV vacuum circuit breaker switch is difficult to meet the national standard or power standard under the same insulation medium and rated voltage level, or its insulation performance meets the national standard or power standard, and its switch volume is large, weight is heavy, structure is more complex, and production cost is higher. SUMMARY

[0004] The utility model discloses a kind of circuit breaker switches for 24kV circuit breaker switch cabinet to overcome the deficiency of at least one prior art.

[0005] To achieve the above object, the utility model adopts the following technical scheme: a kind of circuit breaker switch for 24kV circuit breaker switch cabinet, including vacuum switch and disconnecting switch, vacuum switch includes vacuum interrupter, disconnecting switch includes disconnecting switch static contact, disconnecting switch static contact is lapped on the static end of vacuum interrupter by connecting device, connecting device includes pressing rod and contact support, pressing rod is movably connected with contact support, and the static contact of disconnecting switch and static end is kept lapped state by the movement of pressing rod and the fixed height of vacuum interrupter is adjusted.

[0006] Further, the vacuum switch includes a main shaft, a vacuum switch rack, a vacuum transmission assembly mounted on the vacuum switch rack, and a vacuum interrupter assembly, the vacuum transmission assembly is connected to the main shaft and the vacuum interrupter assembly, the vacuum switch rack includes a pair of vacuum switch side plates and a vacuum switch front plate, the vacuum interrupter assembly and the vacuum transmission assembly are located between the pair of vacuum switch side plates, and the vacuum switch front plate is connected to the pair of vacuum switch side plates.

[0007] Further, the contact support is fixedly connected to the vacuum side plate, and the pressing rod is threadedly connected to the contact support.

[0008] Further, the disconnecting switch further includes a disconnecting switch frame, a moving knife assembly, and a trapezoidal insulator, the moving knife assembly is mounted on the disconnecting switch frame through the trapezoidal insulator.

[0009] Further, the isolating switch frame comprises an isolating switch frame front plate, an isolating switch frame rear plate, an isolating ground beam and a moving contact seat beam, the isolating switch frame front plate and the isolating switch frame rear plate are connected with the vacuum side plate, the isolating ground beam is located between the isolating switch frame front plate and the isolating switch frame rear plate and is welded at both ends with the isolating switch frame front plate and the isolating switch frame rear plate, and the moving contact seat beam is located between the isolating switch frame front plate and the isolating switch frame rear plate and is welded at both ends with the isolating switch frame front plate and the isolating switch frame rear plate.

[0010] Further, the moving contact assembly comprises a moving contact and a moving contact seat, the moving contact is provided with a stamping convex, the moving contact seat is provided with a stamping concave, the stamping convex is embedded with the stamping concave, and the moving contact is rotationally connected with the moving contact seat.

[0011] Further, the moving contact seat is fixedly arranged on the trapezoidal insulator, and the trapezoidal insulator is fixedly connected with the moving contact seat beam.

[0012] Further, the isolating ground beam and the moving contact seat beam are arranged in a bent structure.

[0013] Further, the moving contact is provided with a shielding cover.

[0014] Further, the main shaft is a hexagonal FR4 vacuum impregnated rod.

[0015] Therefore, the isolating switch has the advantages that:

[0016] 1) The isolating switch can press the isolating switch static contact on the static end of the vacuum arc-extinguishing chamber through the pressing rod, the pressing rod is screw-connected with the contact support, the height of the pressing rod in the vertical direction can be adjusted, the fixed height of the vacuum arc-extinguishing chamber is adjusted, the dynamic contact pressure of the dynamic end of the three-phase vacuum arc-extinguishing chamber and the dynamic contact wear compensation overstroke are adjusted, and therefore the contact lapping effectiveness within the range of the allowable contact wear amount is ensured.

[0017] 2) The isolating switch can limit the pressure-keeping cam through the nylon screw, the metal part tip can be reduced, and the uniformity of the electric field is improved.

[0018] 3) When the moving contact is connected with the moving contact seat, the stamping convex is embedded with the stamping concave, and the lapping effectiveness is ensured when the installation plane of the moving contact and the moving contact seat has an allowable angular deviation.

[0019] 4) The moving contact seat of the isolating switch is fixedly arranged on the trapezoidal insulator, the trapezoidal insulator is fixedly connected with the moving contact seat beam, the high-voltage potential and the ground potential can be isolated through the trapezoidal insulator, and the insulation performance of the isolating switch is effectively ensured.

[0020] 5)The utility model discloses a movable knife seat, isolating switch static contact is bent copper piece, movable knife seat, isolating switch static contact only through bending forming and does not use casting process, improves production efficiency, reduces the complexity of processing technology and manufacturing process, and the manufacturing cost is low, through the optimization of structure, the material amount is greatly reduced, and it is more competitive in the market.

[0021] 6)The utility model discloses the main circuit conductor periphery electric field distribution situation of switch is improved, make local discharge performance satisfy the use requirement of specific occasion, simultaneously through the optimization of structure, reduce production difficulty, reduce production cost structure's optimization, make it comply with the requirement of national / electric power standard on insulation performance. BRIEF DESCRIPTION OF DRAWINGS

[0022] Fig. 1 It is the breaker switch shaft drawing of the utility model.

[0023] Fig. 2 It is the breaker switch internal schematic view of the utility model. DETAILED DESCRIPTION

[0024] The embodiments of the utility model will be described below through specific concrete examples, and the person skilled in the art can easily understand other advantages and effects of the utility model from the content disclosed in the specification. The utility model can also be implemented or applied through another different specific embodiment, and each detail in the specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the utility model. It should be noted that the following examples and features in the examples can be combined with each other without conflict.

[0025] It should be noted that the diagrams provided in the following examples only illustrate the basic concept of the utility model in a schematic manner, and only the components related to the utility model are shown in the diagrams, not the number, shape and size of the components during actual implementation. The shape, number and proportion of each component during actual implementation can be changed arbitrarily, and the component layout pattern can also be more complex.

[0026] All directional indications (such as up, down, left, right, front, back, transverse, longitudinal,...) in the embodiments of the utility model are only used to explain the relative position relationship, movement condition, etc. between the components in a certain specific posture, and if the specific posture changes, the directional indications also change accordingly.

[0027] Due to installation errors and other reasons, the parallel relationship referred to in the embodiments of the utility model may actually be an approximate parallel relationship, and the perpendicular relationship may actually be an approximate perpendicular relationship.

[0028] Embodiment one:

[0029] AsFigs. 1-2 As shown, a circuit breaker switch for a 24kV circuit breaker switchgear includes a vacuum switch 1 and a disconnecting switch 2. The vacuum switch 1 includes a vacuum interrupter 130, and the disconnecting switch 2 includes a stationary contact 20. The stationary contact 20 is connected to the stationary end of the vacuum interrupter 130 via a connecting device 3. The connecting device 3 includes a pressure rod 31 and a contact bracket 32. The pressure rod 31 is movably connected to the contact bracket 32. The movement of the pressure rod 31 keeps the stationary contact 20 connected to the stationary end and adjusts the fixed height of the vacuum interrupter.

[0030] Vacuum switch 1 includes a main spindle 10, a vacuum switch frame 11, a vacuum transmission assembly 12 and a vacuum interrupter assembly 13 mounted on the vacuum switch frame 11, and the vacuum transmission assembly 12 is linked to the main spindle 10 and the vacuum interrupter assembly 13.

[0031] The vacuum switch frame 11 includes a pair of vacuum switch side plates 111 and a vacuum switch front plate 112. The pair of vacuum switch side plates 111 are arranged in parallel. The vacuum interrupter assembly 13 and the vacuum transmission assembly 12 are located between the pair of vacuum switch side plates 111. The vacuum interrupter assembly 13 and the vacuum transmission assembly 12 are installed on the vacuum switch frame 11 using existing mounting structures, which will not be described in detail here. The vacuum switch front plate 112 is arranged perpendicularly to the pair of vacuum switch side plates 111 and is connected to the pair of vacuum switch side plates 111 through a bent edge with a threaded hole.

[0032] The vacuum switch side plate 111 is manufactured using a conventional FR4 vacuum impregnation plate milling process.

[0033] The main spindle 10 is connected to the front plate 112 of the vacuum switch through a dynamic seal 113. The main spindle 10 is linked with the operating mechanism of the circuit breaker mechanism, and the torque of the operating mechanism is transmitted to the main spindle 10 through the dynamic seal.

[0034] The main shaft 10 is a hexagonal FR4 vacuum impregnation rod. The torque of the operating mechanism is transmitted to the vacuum transmission assembly 12 through the main shaft 10, while the three-phase live parts of the vacuum switch are isolated with sufficient set insulation gaps.

[0035] like Fig. 2 As shown, the vacuum transmission assembly 12 includes a cam support 121, a pressure-holding cam 122, a pressure-holding pin, a pressure-holding cap 124, a pressure-holding spring 125, and a pressure-holding gasket 126.

[0036] The cam support 121 is fixedly connected with the vacuum side plate 11 at both ends, the cam support 121 is rotationally connected with the main shaft 10, the pressure maintaining cam 122 is fixedly connected with the main shaft 10, the main shaft 10 drives the pressure maintaining cam 122 to rotate synchronously, the main shaft 10 is fixedly provided with nylon screws 101, the nylon screws 101 are located on both sides of the pressure maintaining cam 122, the nylon screws 101 limit the pressure maintaining cam 122, and meanwhile, the nylon material can reduce the sharp ends of metal parts, so that the uniformity of an electric field is improved.

[0037] The cam support 121 supports the three-phase pressure maintaining cam 122 of the vacuum switch, the cam support 121 is provided with a vertical pressure maintaining pin guide groove (not shown in the figure), the pressure maintaining cam 122 is provided with a cam curve sliding groove, a roller is slidably connected in the cam curve sliding groove, and the roller is matched with the pressure maintaining pin guide groove, so as to convert the rotary motion from the main shaft 10 into linear motion in the vertical direction.

[0038] The roller is arranged on the pressure maintaining pin, the pressure maintaining pin penetrates through the pressure maintaining cap sleeve 124, the pressure maintaining pin transmits the vertical motion from the roller to the pressure maintaining cap sleeve 124, the pressure maintaining cap sleeve 124 is connected with the vacuum pull rod 131 of the vacuum arc chamber assembly 13, the vacuum pull rod 131 is provided with a pressure maintaining gasket 126, the pressure maintaining cap sleeve 124 and the pressure maintaining gasket 126 are provided with a pressure maintaining spring 125, the vacuum pull rod 131 is fixedly connected with a moving contact of the vacuum arc chamber 130, in the process of vertical downward motion of the pressure maintaining cap sleeve, the pressure maintaining spring 125 is compressed to a certain extent, the pressure of the pressure maintaining spring 125 is transmitted to the moving contact of the vacuum arc chamber through the pressure maintaining gasket 126 and a soft connection overlapped with a dynamic end of the vacuum arc chamber, so that the vacuum arc chamber has a certain pressure to resist the electric dynamic reaction force generated when the vacuum arc chamber is closed, and the effective contact between the moving contact and the static contact in the vacuum arc chamber is ensured.

[0039] The vacuum arc chamber assembly 13 comprises the vacuum arc chamber 130 and the vacuum pull rod 131, and the vacuum pull rod 131 is connected with the moving contact.

[0040] The dynamic end of the vacuum arc chamber 130 is overlapped with a soft connection 133, the two ends of the soft connection 133 are arranged on the vacuum side plate 11, the soft connection is a conductive part with a certain deformation capacity, which transmits the current on the bus to the dynamic end overlapping plane of the vacuum arc chamber, and the deformation capacity can avoid damage to the dynamic end of the vacuum arc chamber in the process of vertical motion.

[0041] The static end of the vacuum arc-extinguishing chamber 130 is connected to the disconnecting switch static contact 20 through a connecting device 3, which comprises a pressing rod 31 and a contact bracket 32, the contact bracket 32 is fixedly connected to the vacuum side plate 11, the contact bracket 32 is fixedly provided with a nut 33, the pressing rod 31 is provided with a matching external thread, the pressing rod 31 passes through the nut 33 on the contact bracket 32, and the disconnecting switch static contact 20 is pressed against the static end of the vacuum arc-extinguishing chamber 130 in the process of thread locking. The pressing rod 31 is movably connected to the contact bracket 32, so that the height of the pressing rod 31 in the vertical direction can be adjusted, and then the fixed height of the vacuum arc-extinguishing chamber is adjusted, so that the dynamic contact pressure of the three-phase vacuum arc-extinguishing chamber dynamic end and the dynamic contact wear compensation overtravel are adjusted, thereby ensuring the effectiveness of the contact lap within the range of the allowable contact wear amount.

[0042] The vacuum switch in the embodiment can be used alone in existing equipment, and the structures not described in the vacuum switch adopt existing components, which will not be described here.

[0043] The disconnecting switch 2 comprises a disconnecting switch static contact 20, a disconnecting switch frame 21, a disconnecting switch transmission component 22, a disconnecting switch main shaft 23, a grounding static contact 24, a dynamic knife assembly 25, and a trapezoidal insulator 26. The dynamic knife assembly 25 is installed on the disconnecting switch frame 21 through the trapezoidal insulator 26, the disconnecting switch main shaft 23 is rotationally connected to the disconnecting switch frame 21, the disconnecting switch transmission component 22 is connected to the disconnecting switch main shaft 23, and the disconnecting switch transmission component 22 is linked with the disconnecting switch static contact 20 or the grounding static contact 24.

[0044] The disconnecting switch frame 21 comprises a disconnecting switch frame front plate 211, a disconnecting switch frame rear plate 212, an isolation grounding cross beam 213, and a dynamic knife seat cross beam 214. The disconnecting switch frame front plate 211 and the disconnecting switch frame rear plate 212 are installed on the vacuum switch rack 11 of the vacuum switch 1 through bent edges with threaded holes. The isolation grounding cross beam 213 is located between the disconnecting switch frame front plate 211 and the disconnecting switch frame rear plate 212 and is welded at both ends to the disconnecting switch frame front plate 211 and the disconnecting switch frame rear plate 212. The dynamic knife seat cross beam 214 is located between the disconnecting switch frame front plate 211 and the disconnecting switch frame rear plate 212 and is welded at both ends to the disconnecting switch frame front plate 211 and the disconnecting switch frame rear plate 212.

[0045] The isolation grounding cross beam 213 and the dynamic knife seat cross beam 214 are both U-shaped bent structures, which effectively enhance the bending resistance of the isolation grounding cross beam 213 and the dynamic knife seat cross beam 214. The isolation grounding cross beam 213 is fixedly provided with an isolation grounding row 241 on the opposite end face of the disconnecting switch transmission component 22, and the grounding static contact 24 is fixedly provided on the isolation grounding row 241. The dynamic knife assembly 25 is fixedly provided on the dynamic knife seat cross beam 214 through the trapezoidal insulator 26.

[0046] The axis direction of the isolating switch main shaft 23 is parallel to the length direction of the moving knife holder crossbeam 214, the output end of the isolating switch main shaft 23 is rotationally connected with the isolating switch frame front plate 211, the input end of the isolating switch main shaft 23 penetrates through the isolating switch frame front plate 211 and is dynamically sealed with the isolating switch frame front plate 211, the input end of the isolating switch main shaft 23 is fixedly provided with the cam disc 27, the isolating switch 2 is linked with the three-position operating mechanism through the cam disc 27, the linkage structure and mechanism adopt the existing ones, and details are not described herein.

[0047] In the embodiment, the isolating switch main shaft 23 is a square steel.

[0048] The moving knife assembly 25 comprises a moving knife 251 and a moving knife holder 252, the moving knife 251 is rotationally connected with the moving knife holder 252, the moving knife 251 is connected with the isolating switch transmission component 22, and the isolating switch transmission component 22 drives the moving knife 251 to rotate.

[0049] The moving knife 251 is connected with the isolating switch main shaft 23 through the isolating switch transmission component 22, the isolating switch main shaft 23 transmits the movement to the moving knife 251 through the isolating switch transmission component 22, the moving knife 251 changes the grounding, isolation or closing position, thereby realizing the grounding, opening and closing states of the isolating switch 2.

[0050] In the embodiment, the isolating switch transmission component 22 adopts the existing structure, and details are not described herein.

[0051] The free end of the moving knife 251 is provided with a shielding cover 2511, the shielding cover 2511 can make the electric field intensity distribution around the isolation moving knife more uniform.

[0052] The fixed end of the moving knife 251 is provided with a stamping convex (not shown in the figure), the moving knife holder 252 is provided with a stamping concave (not shown in the figure), when the moving knife 251 is connected with the moving knife holder 252, the stamping convex and the stamping concave are embedded, thereby ensuring the lapping effectiveness when the installation plane of the moving knife 251 and the moving knife holder 252 has an allowable angular deviation.

[0053] The moving knife holder 252 is fixedly provided on the trapezoidal insulator 26, the trapezoidal insulator 26 is fixedly connected with the moving knife holder crossbeam 214, the high-voltage potential and the grounding potential can be isolated through the trapezoidal insulator 26, thereby effectively ensuring the insulation performance of the isolating switch.

[0054] In the embodiment, the isolating switch can be independently used in the existing equipment, and the unexplained structure of the isolating switch adopts the existing components, and details are not described herein.

[0055] In the embodiment, the movable knife holder 252 and the static contact of the disconnecting switch 20 are copper pieces that are bent, and the movable knife holder 252 and the static contact of the disconnecting switch 20 are only formed by bending without using a casting process, so that the production efficiency is improved, the complexity of the machining process and the manufacturing process is reduced, the manufacturing cost is low, the material usage is greatly reduced through the optimization of the structure, and the disconnecting switch has more competitiveness in the market.

[0056] In the embodiment, the structures of the disconnecting switch that are not described are adopted with existing components, and details are not described herein.

[0057] Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor should belong to the protection scope of the utility model.

Claims

1. A circuit breaker switch for a 24kV circuit breaker switchgear, characterized in that: It includes a vacuum switch and a disconnecting switch. The vacuum switch includes a vacuum interrupter, and the disconnecting switch includes a stationary contact. The stationary contact of the disconnecting switch is connected to the stationary end of the vacuum interrupter via a connecting device. The connecting device includes a pressure rod and a contact bracket. The pressure rod is movably connected to the contact bracket. The movement of the pressure rod keeps the stationary contact of the disconnecting switch in an overlapping state with the stationary end and adjusts the fixed height of the vacuum interrupter.

2. A circuit breaker switch for a 24kV circuit breaker switchgear according to claim 1, characterized in that: The vacuum switch includes a main shaft, a vacuum switch frame, a vacuum transmission assembly and a vacuum interrupter assembly mounted on the vacuum switch frame. The vacuum transmission assembly is linked to the main shaft and the vacuum interrupter assembly. The vacuum switch frame includes a pair of vacuum switch side plates and a vacuum switch front plate. The vacuum interrupter assembly and the vacuum transmission assembly are located between the pair of vacuum switch side plates. The vacuum switch front plate is connected to the pair of vacuum switch side plates.

3. A circuit breaker switch for a 24kV circuit breaker switchgear according to claim 2, characterized in that: The contact bracket is fixedly connected to the vacuum side plate, and the pressure rod is threadedly connected to the contact bracket.

4. A circuit breaker switch for a 24kV circuit breaker switchgear according to claim 2, characterized in that: The disconnecting switch also includes a disconnecting switch frame, a moving knife assembly, and a trapezoidal insulator. The moving knife assembly is mounted on the disconnecting switch frame via the trapezoidal insulator.

5. A circuit breaker switch for a 24kV circuit breaker switchgear according to claim 4, characterized in that: The disconnector frame includes a front plate, a rear plate, an isolation grounding beam, and a moving knife seat beam. The front and rear plates are connected to the vacuum side plate. The isolation grounding beam is located between the front and rear plates and is welded to both ends of the front and rear plates. The moving knife seat beam is located between the front and rear plates and is welded to both ends of the front and rear plates.

6. A circuit breaker switch for a 24kV circuit breaker switchgear according to claim 4, characterized in that: The moving blade assembly includes a moving blade and a moving blade holder. The moving blade is provided with a stamped protrusion, and the moving blade holder is provided with a stamped recess. The stamped protrusion and the stamped recess are fitted together, and the moving blade and the moving blade holder are rotatably connected.

7. A circuit breaker switch for a 24kV circuit breaker switchgear according to claim 6, characterized in that: The movable knife holder is fixedly mounted on the trapezoidal insulator, and the trapezoidal insulator is fixedly connected to the crossbeam of the movable knife holder.

8. A circuit breaker switch for a 24kV circuit breaker switchgear according to claim 5, characterized in that: The isolation grounding crossbeam and the moving knife seat crossbeam are designed with a bent structure.

9. A circuit breaker switch for a 24kV circuit breaker switchgear according to claim 5, characterized in that: The moving blade is equipped with a shield.

10. A circuit breaker switch for a 24kV circuit breaker switchgear according to claim 2, characterized in that: The spindle is a hexagonal FR4 vacuum impregnation rod.

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