An integrated adjustable pole-mounted circuit breaker
By using a slewing bearing and a motor-driven lead screw moving structure, the problem of the non-adjustable structure of the pole-mounted circuit breaker is solved, enabling flexible adjustment of the solid-sealed pole, adapting to the installation requirements of different altitudes and environments, and improving the applicability and transportation stability of the equipment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- JIANGSU DAQUAN HIGH VOLTAGE SWITCH CO LTD
- Filing Date
- 2023-02-09
- Publication Date
- 2026-07-31
AI Technical Summary
The existing pole-mounted circuit breaker has a fixed and non-adjustable structure, which cannot adapt to the usage requirements of different altitudes and harsh environments, resulting in increased costs and unsuitable performance.
The structure employs a slewing bearing and a motor-driven lead screw movement mechanism, combined with a linear slider and a ball screw, to achieve angle and position adjustment of the solid-sealed pole, adapting to installation requirements at different altitudes and in different environments.
It enables flexible adjustment of the solid-sealed poles, ensuring transportation stability and installation adaptability, reducing costs and improving the applicability of the equipment.
Smart Images
Figure CN116525348B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of electrical equipment, and more specifically to an integrated adjustable pole-mounted circuit breaker. Background Technology
[0002] In the production process of ZW32 primary and secondary integrated pole-mounted circuit breakers, the products need to be hoisted from the trolley containing the vacuum interrupter to the assembly table on the production line. During the break-in process, mechanical characteristics, withstand voltage, and complete set testing, the products need to be flipped, twisted, and the position of the assembly table adjusted to achieve different working conditions. Depending on the different needs of the State Grid in different locations and the different altitudes of the installation locations, non-standard customization is often carried out, and the insulation performance requirements of the current transformers and poles are constantly being raised, resulting in increased costs.
[0003] There are two main types of integrated pole-mounted circuit breakers:
[0004] The first design, the ZW32 integrated primary and secondary outdoor AC high-voltage vacuum circuit breaker, employs a three-phase separate column structure. The vacuum interrupter is connected to the primary conductive components and then encapsulated within an insulating sleeve. The insulating sleeve is mounted on a fully sealed housing, which houses the mechanism, transmission components, and secondary components. This design is primarily used in products widely on the market. It connects to the housing via poles, and the internal structure drives the main shaft for transmission. The phase spacing is fixed, and the overall structure is fixed and cannot be adjusted. It is suitable for products used at specific altitudes but not for use in harsh environments.
[0005] The second option is a deeply integrated outdoor high-voltage AC vacuum circuit breaker using a single, solid-sealed pole, consisting of the switch body, intelligent terminal connection cable, etc., suitable for line segmentation, interconnection, branching, and user demarcation. This option is an upgrade of the first option, mainly by integrating the external current transformer into the internal structure, combining the original pole and current transformer into a single unit. However, the overall structure remains unchanged, making it suitable for products used at specific altitudes but not for harsh environments. Summary of the Invention
[0006] To address the aforementioned drawbacks, an integrated adjustable pole-mounted circuit breaker is provided.
[0007] An integrated adjustable pole-mounted circuit breaker includes a housing, a first lead screw moving structure, a second lead screw moving structure, a fixed terminal post, an adjusting pad, and a main shaft assembly. The fixed terminal post has three phases (A, B, and C), with the B-phase fixed terminal post mounted on the housing. Adjusting pads are connected to the bottom of the A and C phase fixed terminal posts, and the moving part of the first lead screw moving mechanism is connected to the bottom of the adjusting pads. The fixed part of the first lead screw moving mechanism is fixed to the housing. The main shaft assembly includes a left moving main shaft, a middle fixed main shaft, and a right moving main shaft. The second lead screw moving structure is installed between the left and right moving main shafts and the middle fixed main shaft. Both the first and second lead screw moving structures are driven by motors, and both motors have a braking function.
[0008] Preferably, the B-phase fixed terminal is connected to the housing via a slewing bearing. Specifically, the B-phase fixed terminal is fixed to the inner ring of the slewing bearing, and the outer ring of the B-phase slewing bearing is fixed to the housing. The A and C-phase fixed terminals are connected to the adjusting pads via slewing bearings. Specifically, the A and C-phase fixed terminals are fixed to the inner ring of the slewing bearing, and the outer rings of the A and C-phase slewing bearings are then fixed to the corresponding phase adjusting pads. The inner and outer rings of the A, B, and C-phase slewing bearings are provided with limiting and fixing holes for use with limiting pins.
[0009] Preferably, the slewing bearing is equipped with a position sensor to indicate the rotation angle of the corresponding phase solid-sealed pole.
[0010] Preferably, the bottom of the adjusting pad is also equipped with a linear slider, which includes a linear guide rail and a slider. The slider is mounted on the linear guide rail so that the slider can only move along the linear guide rail. The adjusting pad and the slider are fixed, and the linear guide rail and the housing are fixed.
[0011] Preferably, the linear guide rail has embedded smooth surfaces on both sides, and the slider is fitted with ball bearings at the contact points with the smooth surfaces on both sides of the linear guide rail.
[0012] Preferably, the linear guide rail is equipped with limit screws at both ends.
[0013] Preferably, the mechanism includes a support partition, and the fixed part of the screw moving mechanism is fixed to the housing via the support partition.
[0014] Preferably, the housing is further equipped with a support partition, and the screw moving mechanism includes a motor, a front fixed plate, a ball screw, a screw bearing seat, a rear fixed plate, a bearing seat fixing plate, and a moving mechanism fixing guide rail; wherein the motor is fixed to the side wall of the housing, the front fixed plate, the rear fixed plate, and the moving mechanism fixing guide rail are fixed to the support partition, one end of the ball screw is connected to the rear fixed plate, and the other end passes through the front fixed plate and is connected to the output shaft of the motor through a coupling, the screw bearing seat is installed on the ball screw, the bearing seat fixing plate is installed on the screw bearing seat, the bearing seat fixing plate is connected to the adjusting pad, and the moving mechanism fixing guide rail cooperates with the bearing seat fixing plate so that the bearing seat fixing plate can only move along the moving mechanism fixing guide rail.
[0015] Preferably, the ball screw is connected to the front fixed plate and the rear fixed plate by ball bearings.
[0016] Preferably, spindle connecting plates are installed on the left and right moving spindles. The second lead screw moving mechanism includes a motor, a front fixed plate, a ball screw, a lead screw bearing seat, a bearing seat fixing plate, and a cover. The motor and the front fixed plate are fixed on the middle fixed spindle. One end of the ball screw is equipped with a cover plate, and the other end passes through the front fixed plate and is connected to the output shaft of the motor through a coupling. The lead screw bearing seat is installed on the ball screw, and the bearing seat fixing plate is installed on the lead screw bearing seat. The bearing seat fixing plate is connected to the spindle connecting plate.
[0017] Beneficial effects:
[0018] 1) The solid-sealed pole is twisted by using a slewing support method. The rotation angle of the solid-sealed pole can be adjusted as needed. When the final shipment is made, the solid-sealed pole can be twisted to facilitate transportation and avoid instability and overturning.
[0019] 2) The motor is connected to the ball screw via a coupling. The movement is achieved by the cooperation between the ball screw and the screw bearing seat. The transmission is smooth and the phase spacing of the product can be adjusted from 300 to 400 mm.
[0020] 3) The linear slider assists the ball screw movement structure, which makes the movement smooth and less prone to jamming. The overall cost is low and it is easy to install and maintain. Attached Figure Description
[0021] Figure 1 It is a schematic diagram of the product's three-dimensional structure;
[0022] Figure 2 This is a schematic diagram of the front view structure of the product after adjustment;
[0023] Figure 3 This is a schematic diagram of the right-side sectional structure of the product's front view;
[0024] Figure 4This is a cross-sectional view of the product from the inverted front view.
[0025] Figure 5 This is a schematic diagram of the lead screw moving structure;
[0026] Figure 6 This is a schematic diagram of a linear slider structure;
[0027] Figure 7 This is a schematic diagram of the main spindle assembly and lead screw movement structure.
[0028] The diagram is labeled as follows: 1. Housing, 2. Slewing bearing, 3. Solid seal pole, 4. Tie rod adjusting plate, 5. Linear slider, 51. Slider, 52. Linear guide rail, 6. Tie rod, 7. Adjusting pad, 8. Screw moving structure one, 81. Motor, 82. Coupling, 83. Front fixed plate, 84. Ball screw, 85. Screw bearing seat, 86. Rear fixed plate, 87. Ball bearing, 88. Bearing seat fixed plate, 89. Moving mechanism fixed guide rail, 9. Support partition, 10. Main spindle assembly, 101. Left moving main spindle, 102. Middle fixed main spindle, 103. Right moving main spindle, 11. Main spindle connecting plate, 12. Cover, 13. Screw moving structure two. Detailed Implementation
[0029] An assembly diagram of an integrated adjustable pole-mounted circuit breaker according to this embodiment is shown below. Figure 1-4 As shown.
[0030] Moving structure: A screw moving structure 8 and an auxiliary linear slider 5 are added to the internal support partition 9 of the ZW32 primary and secondary integrated pole-mounted circuit breaker. The pole-mounted circuit breaker is divided into three phases: A, B, and C. The middle phase B is used as the central reference point, that is, the middle phase B does not use the screw moving structure 8 and the linear slider 5 structure, thus serving as the reference point. The phases A and C use the screw moving structure 8 and the auxiliary linear slider 5 structure to adjust the phase spacing.
[0031] The bottom fixing hole of the solid-sealed pole 3 is connected to the inner ring of the slewing bearing 2 through screw holes. A pull rod 6 is installed inside the solid-sealed pole 3 and extends into the housing 1. A pull rod adjusting plate 4 is also installed at the bottom of the solid-sealed pole 3. The pull rod 6 is connected to the main shaft assembly 10. The main shaft assembly 10 drives the pull rod 6 to move, thereby performing the opening and closing operation. This part belongs to the prior art and will not be described in detail. The bottom outer ring of the A and C phase slewing bearings 2 is fixed to the adjusting pad 7, while the outer ring of the B phase slewing bearing 2 is directly fixed to the housing 1. The top of the slider 51 of the linear slider 5 has mounting holes. It is connected by screws by opening a hole on one side of the adjusting pad 7 that matches the mounting hole on the top of the slider 51. The adjusting pad 7 is bolted to the bearing seat fixing plate 88 on the screw moving structure 8.
[0032] Working principle of lead screw moving structure 18: Figure 5As shown, the motor 81 is fixed to the side of the housing 1 with screws to ensure that the motor will not vibrate during operation. The motor 81 and the ball screw 84 are fixed together by a coupling 82. Utilizing the equal transmission characteristic of the coupling 82, a 1:1 transmission between the motor shaft and the ball screw 84 can be achieved, allowing the ball screw 84 to rotate at the same speed as the motor 81. The front fixing plate 83 and the rear fixing plate 86 are both fixed to the support partition 9 with screws. The two side support partitions are used for fixing, and both sides have ball bearings 87 inside. Utilizing the characteristics of the ball bearings 87 and the coaxiality of the two side supports, it is ensured that the ball screw 84 will not deviate due to high speed during operation. The ball screw 84 and the screw bearing seat 85 are fixed together by ball bearings. When the motor... The rotation of the ball screw 84 is driven by the rotation of the ball screw 84. The rotation is converted into linear motion of the ball screw bearing 85 through the transmission of the balls between the ball screw 84 and the ball screw bearing housing 85. The ball screw bearing housing 85 is connected to the bearing housing fixing plate 88 by screws, and the bearing housing fixing plate 88 can move linearly. The moving mechanism fixing guide rail 89 is fixed to the support partition 9 by screws. The bearing housing fixing plate 88 cooperates with the moving mechanism fixing guide rail 89 and can move along the moving mechanism fixing guide rail 89. The bearing housing fixing plate 88 is fixed to the adjusting shim 7 by screws. In this way, the linear transmission of the bearing housing fixing plate 88 can drive the adjusting shim 7 to move. The adjusting shim 7 drives the solidified pole 3 to move through the slewing bearing 2, thereby realizing the movement of the A and C phases to achieve the purpose of phase spacing adjustment.
[0033] The working principle of linear slider 5: as follows Figure 6 As shown, the linear slider 5 mainly consists of two parts: slider 51 and linear guide rail 52. The linear guide rail 52 has countersunk holes for fixing to the support plate 9. The linear guide rail 52 has inlaid smooth surfaces on both sides. The slider 51 uses ball bearings to move with the smooth surfaces on both sides of the linear guide rail 52. The linear guide rail 52 has limit screws at both ends to prevent the slider from falling off. The linear slider 5 mainly plays an auxiliary role in this mechanism. When the lead screw moving structure 8 is working, the linear slider 5 is driven to move, realizing that the lead screw moving structure 8 and the linear slider 5 move together, ensuring the stability and accuracy of the pole during the movement process.
[0034] like Figure 7As shown, when the solid-sealed poles 3 of phases A and C move, the main shaft assembly 10 also needs to coordinate synchronously. In this embodiment, the main shaft assembly 10 is divided into three sections: a left moving main shaft 101, a middle fixed main shaft 102, and a right moving main shaft 103. The left moving main shaft 101 and the right moving main shaft 103 move relative to the middle fixed main shaft 102 through a screw moving structure 2 13, thereby coordinating with the movement of the solid-sealed poles 3 of phases A and C. The specific structure of the screw moving structure 2 13 is as follows:
[0035] The motor 81 is fixed to the intermediate fixed main shaft 102 with screws to ensure that the motor 81 does not vibrate during operation. The motor 81 and the ball screw 84 are fixed through a coupling 82. Utilizing the equal transmission characteristic of the coupling 82, a 1:1 transmission between the motor shaft and the ball screw 84 can be achieved, allowing the ball screw 84 to rotate at the same speed as the motor 81. The front fixed plate 83 is fixed to the intermediate fixed main shaft 102 with screws and a support partition. The support is equipped with ball bearings 87, which ensure that the ball screw 84 does not deviate due to high speed during operation. The ball screw 84 and the screw bearing seat 85 are fixed through ball bearings. When the motor 81 rotates, driving the ball screw 84 to rotate, the ball screw 84 and the screw bearing seat 85 transmit and fix the transmission. The ball bearings between the lead screw bearing seats 85 transmit power, converting rotation into linear motion of the lead screw bearing seats 85. The lead screw bearing seats 85 are screwed to the bearing seat fixing plate 88, which can move linearly. The bearing seat fixing plate 88 is fixedly connected to the main shaft connecting plate 11, which is fixed to the left moving main shaft 101 by set screws. This allows the linear transmission of the bearing seat fixing plate 88 to drive the left moving main shaft 101 to move. The tail of the lead screw is equipped with a stop cover 12, which can limit the movement and effectively prevent the left moving main shaft 101 and the middle fixed main shaft 102 from breaking due to the large gap. The right moving main shaft 103 operates on the same principle, which can make the main shaft assembly 10 follow the movement of the pole column during the movement, ensuring the relative position of the pull rod 6 and the pole column, and not affecting the use of the opening and closing function.
[0036] Adjustments are made according to the altitude correction coefficient based on the installation location. Based on the geographical altitude, the spacing of the fixed-seal poles 3 of phases A and C is adjusted using the lead screw moving structure 8. The main shaft assembly 10 is synchronized using the lead screw moving structure 2. This allows the spacing between the three phases of the fixed-seal poles to be adjusted from 300mm to 400mm. Once the air insulation distance corresponding to the altitude is reached, the distances of phases A and C relative to phase B are adjusted to be consistent and the phase spacing required for high altitude is achieved. The position is fixed by utilizing the built-in brake function of motor 81, which facilitates adaptation to air insulation distances at different altitudes and to different installation environments.
[0037] Rotational structure: The solid-sealed pole 3 is connected to the inner ring of the slewing bearing 2 by screws, and the outer ring of the slewing bearing 2 is connected to the adjusting shim 7 or the housing 1, thus realizing rotation. The adjusting shim 7 is connected to the bearing seat fixing plate 88 and the slider 51 on the linear slider 5, thus realizing movement. Therefore, the solid-sealed pole can rotate and move simultaneously.
[0038] Rotational Working Principle: This integrated adjustable pole-mounted circuit breaker has a torsional yaw function. During transport, due to the installation characteristics of the solid-sealed poles, instability in the center of gravity can be detected. By uniformly torturing the solid-sealed poles, the center of gravity is aligned with the housing, stabilizing transport and reducing transport space. Utilizing the characteristics of the slewing bearing 2, the adjusting pad 7 and the solid-sealed poles 3 can directly undergo torsional movement. The slewing bearing 2 is equipped with a position sensor to indicate the rotation angle of the solid-sealed poles 3, thus ensuring that the rotation angles of the three-phase solid-sealed poles 3 are consistent. The inner and outer rings of the slewing bearing 2 have limit fixing holes, which, in conjunction with limit pins, allow the three-phase solid-sealed poles 3 to rotate to a preset position and then be fixed.
Claims
1. An integrated adjustable pole-mounted circuit breaker, characterized in that... The assembly includes a housing, a first lead screw moving mechanism, a second lead screw moving mechanism, a fixed terminal post, an adjusting pad, and a main shaft assembly. The fixed terminal post has three phases (A, B, and C), with the B-phase fixed terminal post mounted on the housing. Adjusting pads are connected to the bottom of the A and C phase fixed terminal posts, and the moving part of the first lead screw moving mechanism is connected to the bottom of the adjusting pads. The fixed part of the first lead screw moving mechanism is fixed to the housing. The main shaft assembly includes a left moving main shaft, a middle fixed main shaft, and a right moving main shaft. The second lead screw moving mechanism is installed between the left and right moving main shafts and the middle fixed main shaft. Both the first and second lead screw moving mechanisms are driven by motors, and both motors have a brake function. The housing is also equipped with a support partition. The screw moving mechanism includes a motor, a front fixed plate, a ball screw, a screw bearing seat, a rear fixed plate, a bearing seat fixing plate, and a moving mechanism fixing guide rail. The motor is fixed to the side wall of the housing. The front fixed plate, the rear fixed plate, and the moving mechanism fixing guide rail are fixed to the support partition. One end of the ball screw is connected to the rear fixed plate, and the other end passes through the front fixed plate and is connected to the output shaft of the motor via a coupling. The screw bearing seat is installed on the ball screw, and the bearing seat fixing plate is installed on the screw bearing seat. The bearing seat fixing plate is connected to the adjusting pad. The moving mechanism fixing guide rail cooperates with the bearing seat fixing plate, so that the bearing seat fixing plate can only move along the moving mechanism fixing guide rail. A spindle connecting plate is installed on the left and right moving spindles. The second lead screw moving mechanism includes a motor, a front fixed plate, a ball screw, a lead screw bearing seat, a bearing seat fixing plate, and a cover. The motor and the front fixed plate are fixed on the middle fixed spindle. One end of the ball screw is equipped with a cover plate, and the other end passes through the front fixed plate and is connected to the output shaft of the motor through a coupling. The lead screw bearing seat is installed on the ball screw, and the bearing seat fixing plate is installed on the lead screw bearing seat. The bearing seat fixing plate is connected to the spindle connecting plate.
2. The integrated adjustable pole-mounted circuit breaker according to claim 1, characterized in that... The B-phase fixed terminal is connected to the housing via a slewing bearing. Specifically, the B-phase fixed terminal is fixed to the inner ring of the slewing bearing, and the outer ring of the B-phase slewing bearing is fixed to the housing. The A and C-phase fixed terminals are connected to the adjusting pads via slewing bearings. Specifically, the A and C-phase fixed terminals are fixed to the inner ring of the slewing bearing, and the outer rings of the A and C-phase slewing bearings are then fixed to the corresponding phase adjusting pads. The inner and outer rings of the A, B, and C-phase slewing bearings are provided with limiting and fixing holes for use with limiting pins.
3. The integrated adjustable pole-mounted circuit breaker according to claim 2, characterized in that... The slewing bearing is equipped with a position sensor to indicate the rotation angle of the corresponding phase solid-sealed pole.
4. The integrated adjustable pole-mounted circuit breaker of claim 1, wherein The bottom of the adjusting pad is also equipped with a linear slider, which includes a linear guide rail and a slider. The slider is mounted on the linear guide rail so that the slider can only move along the linear guide rail. The adjusting pad and the slider are fixed, and the linear guide rail and the housing are fixed.
5. The integrated adjustable pole-mounted circuit breaker of claim 4, wherein The linear guide has embedded smooth surfaces on both sides, and ball bearings are installed at the contact points between the slider and the smooth surfaces on both sides of the linear guide.
6. The integrated adjustable pole-mounted circuit breaker of claim 4, wherein Limit screws are installed at both ends of the linear guide.
7. The integrated adjustable pole-mounted circuit breaker of claim 1, wherein It also includes a support partition, and the fixed part of the screw moving mechanism is fixed to the box body through the support partition.
8. The integrated adjustable pole-mounted circuit breaker of claim 1, wherein The ball screw is connected to the front fixed plate and the rear fixed plate by ball bearings.