Combined type pole-mounted vacuum circuit breaker

Abstract

The utility model discloses a combined type pole-mounted vacuum circuit breaker, and relates to the technical field of vacuum circuit breakers. Comprising a mechanism box, the outer wall of the top of the mechanism box is fixedly connected with an arc extinguish chamber, the outer wall of the arc extinguish chamber is fixedly connected with a current transformer, the switch device comprises a positioning frame, the inner wall of the positioning frame is rotatably connected with a wheel shaft, the outer wall of the wheel shaft is rotatably connected with an ejector rod, and the ejector rod is fixedly connected with the mechanism box. A knife switch is slidably connected to the outer wall of the top of the ejector rod, a connecting device is rotatably connected to the outer wall of the knife switch, and rotating frames are fixedly connected to the two ends of the wheel shaft. Through the arrangement of the connecting device and the arrangement of a compression spring and a limiting rod, the knife switch rotates around the fixing frame, it is ensured that circuit connection is stable and reliable, and meanwhile the installation process is simplified; the installation process of the knife switch is simplified, the installation time of the knife switch is saved, and stable circuit connection is ensured.

Description

Technical Field

[0001] This utility model relates to the field of vacuum circuit breaker technology, specifically a combined pole-mounted vacuum circuit breaker. Background Technology

[0002] In power systems, pole-mounted vacuum circuit breakers are key equipment for ensuring the safe and stable operation of distribution networks. They are widely used in scenarios such as segmentation, interconnection, and protection of overhead lines. Whether it is the refined management of urban power grids or the upgrading and transformation of rural power grids, pole-mounted vacuum circuit breakers play an important role. However, existing pole-mounted vacuum circuit breakers have shortcomings in terms of installation and operational stability. Traditional pole-mounted vacuum circuit breakers have complex switch installation structures, requiring operators to perform cumbersome connection and fixing operations at high altitudes. At the same time, during operation, due to the lack of effective limit and stabilization mechanisms, when the circuit breaker is at a high altitude and the circuit needs to be disconnected, it is difficult for operators to control the position of the switch using tools such as long poles. The switch is prone to falling back, which not only fails to effectively cut off the circuit but may also damage the equipment due to arc reignition, threatening the safe operation of the power system and increasing power maintenance costs and risks. Utility Model Content

[0003] (a) Technical problems to be solved

[0004] To address the shortcomings of existing technologies, this utility model provides a combined pole-mounted vacuum circuit breaker. By simplifying the installation process through a connecting device and ensuring operational safety through a stable limiting and sliding structure, it overcomes the drawbacks of traditional equipment, improves the installation efficiency and operational stability of pole-mounted vacuum circuit breakers, and provides a guarantee for reliable power supply to the power system.

[0005] (II) Technical Solution

[0006] To achieve the above objectives, this utility model is implemented through the following technical solution: a combined pole-mounted vacuum circuit breaker, including a mechanism box, an arc-extinguishing chamber fixedly connected to the outer wall of the top of the mechanism box, a current transformer fixedly connected to the outer wall of the arc-extinguishing chamber, and a switching device, the switching device including a positioning frame, an axle rotatably connected to the inner wall of the positioning frame, an ejector rod rotatably connected to the outer wall of the axle, a switch blade slidably connected to the outer wall of the top of the ejector rod, a connecting device rotatably connected to the outer wall of the switch blade, and rotating frames fixedly connected to both ends of the axle;

[0007] Preferably, the connecting device includes a connecting plate, an insertion shaft is fixedly connected to the outer wall of the connecting plate, a fixing frame is fixedly connected to the end of the connecting plate away from the insertion shaft, a sliding rod is slidably connected to the inner wall of the fixing frame, a compression spring is sleeved on the outer wall of the sliding rod, a limit rod is fixedly connected to the outer wall of the sliding rod, and the limit rod is slidably connected to the inner wall of the fixing frame through a limit groove, with the limit groove being formed in the wall of the fixing frame. By setting up the connecting device and utilizing the compression spring and the limit rod, the switch installation process is simplified, the switch installation time is saved, and the circuit connection is ensured to be stable.

[0008] Preferably, the outer wall of the rotating frame is slidably connected to the side wall of the mechanism box via a sliding groove, and the sliding groove is formed in the wall of the rotating frame. The outer wall of the positioning frame is fixedly connected to the outer wall of the mechanism box. The outer walls of the insertion shaft and the connecting plate are both fixedly connected to the outer wall of the current transformer. The outer wall of the fixed frame is slidably connected to the outer wall of the switch. The outer wall of the limiting rod is rotatably connected to the outer wall of the switch. One end of the compression spring is fixedly connected to the inner wall of the fixed frame, and the other end of the compression spring is fixedly connected to the outer wall of the limiting rod.

[0009] Preferably, the limiting device includes a connecting strip, with sliding blocks fixedly connected to the outer walls of both ends of the connecting strip. The outer walls of the sliding blocks have clearance grooves. A telescopic rod is fixedly connected to the end of the sliding block furthest from the connecting strip. A compression spring is sleeved on the outer wall of the telescopic rod. The outer wall of the sliding block is slidably connected to the inner wall of the mechanism box. One end of the compression spring is fixedly connected to the inner wall of the mechanism box, and the other end is fixedly connected to the outer wall of the sliding block. The rotating frame is slidably connected to the mechanism box, ensuring stable rotation of the axle and controllable switch action. When the switch is pulled at height, the limiting device uses the compression spring and telescopic rod, along with the clearance grooves, to limit the position of the rotating frame, preventing the switch from falling back and ensuring a stable circuit disconnection state.

[0010] (III) Beneficial Effects

[0011] This utility model provides a combined pole-mounted vacuum circuit breaker. It has the following advantages:

[0012] (i) The pole-mounted vacuum circuit breaker simplifies the switch installation process and saves installation time by setting up a connection device, using a compression spring and a limit rod, while ensuring a stable circuit connection.

[0013] (ii) The pole-mounted vacuum circuit breaker is slidably connected to the mechanism box through a rotating frame, which ensures stable rotation of the wheel axle and makes the switch action controllable. When the limit device is used to pull the switch at high altitude, it uses a compression spring and a telescopic rod in conjunction with the clearance groove to limit the position of the rotating frame, prevent the switch knife from falling back, ensure the stability of the circuit disconnection state, and improve the safety of operation. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the switching device of this utility model;

[0016] Figure 3 This is a partial structural diagram of the guillotine switch of this utility model;

[0017] Figure 4 for Figure 3 Enlarged structural diagram at point A;

[0018] Figure 5 This is a schematic diagram of the limiting device of this utility model.

[0019] In the diagram: 1. Mechanism box; 2. Arc-extinguishing chamber; 3. Current transformer; 4. Switching device; 5. Sliding groove; 6. Limiting device; 41. Positioning frame; 42. Rotating frame; 43. Wheel axle; 44. Push-out rod; 45. Knife switch; 46. Connecting device; 461. Connecting plate; 462. Insertion shaft; 463. Fixing frame; 464. Sliding rod; 465. Compression spring; 466. Limiting rod; 467. Limiting groove; 61. Connecting bar; 62. Sliding block; 63. Clearance groove; 64. Telescopic rod; 65. Compression spring. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figure 1-5This utility model provides a technical solution: a combined pole-mounted vacuum circuit breaker, including a mechanism box 1, an arc-extinguishing chamber 2 fixedly connected to the outer wall of the top of the mechanism box 1, a current transformer 3 fixedly connected to the outer wall of the arc-extinguishing chamber 2, and a switching device 4, including a positioning frame 41, an axle 43 rotatably connected to the inner wall of the positioning frame 41, an ejector rod 44 rotatably connected to the outer wall of the axle 43, a switch 45 slidably connected to the outer wall of the top of the ejector rod 44, a connecting device 46 rotatably connected to the outer wall of the switch 45, and rotating frames 42 fixedly connected to both ends of the axle 43. Since the eccentric position of the axle 43 is rotatably connected to the bottom end of the ejector rod 44, when the axle 43 rotates, it will drive the ejector rod 44 to move up and down. The top of the ejector rod 44 is slidably connected to the switch 45, thereby pushing the switch 45 to disconnect the circuit. The rotating frames 42 at both ends of the axle 43 are slidably connected to the side wall of the mechanism box 1 through sliding grooves 5, ensuring the stability of the axle 43 when rotating, and also limiting its movement trajectory.

[0022] The connecting device 46 includes a connecting plate 461. An insertion shaft 462 is fixedly connected to the outer wall of the connecting plate 461. A fixing frame 463 is fixedly connected to the end of the connecting plate 461 away from the insertion shaft 462. A sliding rod 464 is slidably connected to the inner wall of the fixing frame 463. A compression spring 465 is sleeved on the outer wall of the sliding rod 464. A limiting rod 466 is fixedly connected to the outer wall of the sliding rod 464. The limiting rod 466 is slidably connected to the inner wall of the fixing frame 463 through a limiting groove 467, which is formed in the wall of the fixing frame 463. The connecting plate 461 is fixed to the outer wall of the current transformer 3, and the insertion shaft 462 on its outer wall is further reinforced. For stable connection, the mounting bracket 463 is slidably connected to the outer wall of the switch 45, and the internal sliding rod 464 can slide along the inner wall of the mounting bracket 463. When the switch 45 is assembled, pulling the sliding rods 464 on both sides causes the limiting rod 466 to move accordingly and compress the compression spring 465. The limiting rod 466 slides on the inner wall of the mounting bracket 463 through the limiting groove 467. At this time, the switch 45 is placed on the mounting bracket 463. Then, the pulling force of the sliding rod 464 is released. The compression spring 465, which was previously compressed, will push the sliding rod 464 into the interior of the mounting bracket 463 and drive the limiting rod 466 to position the switch 45.

[0023] The outer wall of the rotating frame 42 is slidably connected to the side wall of the mechanism box 1 through the sliding groove 5, and the sliding groove 5 is opened in the wall of the rotating frame 42. The outer wall of the positioning frame 41 is fixedly connected to the outer wall of the mechanism box 1. The outer walls of the insertion shaft 462 and the connecting plate 461 are both fixedly connected to the outer wall of the current transformer 3. The outer wall of the fixing frame 463 is slidably connected to the outer wall of the switch 45. The outer wall of the limiting rod 466 is rotatably connected to the outer wall of the switch 45. One end of the compression spring 465 is fixedly connected to the inner wall of the fixing frame 463, and the other end of the compression spring 465 is fixedly connected to the outer wall of the limiting rod 466.

[0024] The limiting device 6 includes a connecting strip 61, with sliding blocks 62 fixedly connected to the outer walls of both ends of the connecting strip 61. The outer walls of the sliding blocks 62 have clearance grooves 63. A telescopic rod 64 is fixedly connected to the end of the sliding block 62 furthest from the connecting strip 61. A compression spring 65 is sleeved on the outer wall of the telescopic rod 64. The outer wall of the sliding block 62 is slidably connected to the inner wall of the mechanism box 1. One end of the compression spring 65 is fixedly connected to the inner wall of the mechanism box 1, and the other end is fixedly connected to the outer wall of the sliding block 62. The sliding blocks 62 at both ends of the connecting strip 61 slide on the inner wall of the mechanism box 1. The clearance grooves 63 on the sliding blocks 62 can provide space for the movement of the rotating frame 42 when necessary. The telescopic rod 64 and the compression spring 65 work together. When it is necessary to disconnect the circuit and pull the switch, since the pole-mounted vacuum circuit breaker is at a high altitude, the operator needs to use a long rod or other tools to assist in pulling the switch. When the long rod is caught on the rotating frame 42, a more stable pulling force can be obtained through the compression mechanism box 1. At this time, the connecting bar 61 is compressed, the compression spring 65 is compressed, and the telescopic rod 64 is also compressed, so that the clearance groove 63 of the sliding block 62 and the sliding groove 5 are connected. After the rotating frame 42 is pulled down, the long rod moves away from the connecting bar 61, so that the compression spring 65 pushes the sliding block 62 to move, thereby causing the clearance groove 63 to move away, thus restricting the rotating frame 42 to the bottom of the sliding groove 5.

[0025] In use, this combined pole-mounted vacuum circuit breaker is mainly composed of components such as mechanism box 1, arc-extinguishing chamber 2, current transformer 3, and switching device 4, which realizes effective control and protection of the circuit. Mechanism box 1 is the supporting part of the entire circuit breaker and provides the installation foundation for other components. The arc-extinguishing chamber 2, which is fixed on the top, is responsible for extinguishing the arc when the circuit is opened and closed, ensuring operational safety. The current transformer 3 connected to the outer wall of the arc-extinguishing chamber 2 can monitor the current in the circuit in real time and provide data support for subsequent operations.

[0026] The switch device 4 is a key component for controlling the opening and closing of the circuit. The positioning frame 41 is fixed on the outer wall of the mechanism box 1. The wheel axle 43 is installed in the positioning frame 41 and can rotate. Since the eccentric position of the wheel axle 43 is rotatably connected to the bottom end of the ejector rod 44, when the wheel axle 43 rotates, it will drive the ejector rod 44 to move up and down. The top of the ejector rod 44 is slidably connected to the switch 45, thereby pushing the switch 45 to disconnect the circuit. The rotating frames 42 at both ends of the wheel axle 43 are slidably connected to the side wall of the mechanism box 1 through the sliding groove 5, ensuring the stability of the wheel axle 43 when rotating, and also limiting its movement trajectory, making the entire switch action more controllable.

[0027] The connecting device 46 is used to connect the switch 45 and the current transformer 3 to ensure the stability of the circuit connection. The connecting plate 461 is fixed to the outer wall of the current transformer 3, and the insertion shaft 462 on its outer wall further strengthens the stability of the connection. The fixing frame 463 is slidably connected to the outer wall of the switch 45. The sliding rod 464 inside can slide along the inner wall of the fixing frame 463. When the switch 45 is assembled, pulling the sliding rods 464 on both sides causes the limiting rod 466 to move accordingly and compress the compression spring 465. The limiting rod 466 slides on the inner wall of the fixing frame 463 through the limiting groove 467. At this time, the switch 45 is placed on the fixing frame 463. Then, the pulling force of the sliding rod 464 is released. The compression spring 465, which was previously compressed, will push the sliding rod 464 into the interior of the fixing frame 463 and drive the limiting rod 466 to position the switch 45. Finally, the switch 45 rotates around the fixing frame 463 to ensure the stable and reliable circuit connection and simplify the installation process.

[0028] The limiting device 6 plays an auxiliary limiting role inside the mechanism box 1. The sliding blocks 62 at both ends of the connecting bar 61 slide on the inner wall of the mechanism box 1. The clearance groove 63 on the sliding block 62 can provide space for the movement of the rotating frame 42 when necessary. The telescopic rod 64 and the compression spring 65 work together. When it is necessary to disconnect the circuit and pull the switch, since the pole-mounted vacuum circuit breaker is at a high altitude, the operator needs to use a long rod or other tools to assist in pulling the switch. When the long rod is caught on the rotating frame 42, a more stable pulling force can be obtained by squeezing the mechanism box 1. At this time, the connecting bar 61 is squeezed, the compression spring 65 is compressed, the telescopic rod 64 is also compressed, and the clearance groove 63 of the sliding block 62 is connected to the sliding groove 5. At this time, after the rotating frame 42 is pulled down, the long rod moves away from the connecting bar 61, so that the compression spring 65 pushes the sliding block 62 to move, thereby moving the clearance groove 63 away, thus restricting the rotating frame 42 to the bottom of the sliding groove 5, ensuring that the switch 45 remains stable after being lifted and is difficult to fall back, thereby protecting the circuit.

[0029] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A combined pole-mounted vacuum circuit breaker, comprising a mechanism box (1), wherein an arc-extinguishing chamber (2) is fixedly connected to the outer wall of the top of the mechanism box (1), and a current transformer (3) is fixedly connected to the outer wall of the arc-extinguishing chamber (2), characterized in that: Also includes: A switching device (4) includes a positioning frame (41), an axle (43) is rotatably connected to the inner wall of the positioning frame (41), an ejector rod (44) is rotatably connected to the outer wall of the axle (43), a knife switch (45) is slidably connected to the outer wall of the top of the ejector rod (44), a connecting device (46) is rotatably connected to the outer wall of the knife switch (45), and a rotating frame (42) is fixedly connected to both ends of the axle (43). The connecting device (46) includes a connecting plate (461), an insertion shaft (462) is fixedly connected to the outer wall of the connecting plate (461), a fixing frame (463) is fixedly connected to the end of the connecting plate (461) away from the insertion shaft (462), a sliding rod (464) is slidably connected to the inner wall of the fixing frame (463), a compression spring (465) is sleeved on the outer wall of the sliding rod (464), a limiting rod (466) is fixedly connected to the outer wall of the sliding rod (464), the limiting rod (466) is slidably connected to the inner wall of the fixing frame (463) through a limiting groove (467), and the limiting groove (467) is opened in the wall of the fixing frame (463); The limiting device (6) includes a connecting strip (61), and a sliding block (62) is fixedly connected to the outer wall of both ends of the connecting strip (61). The outer wall of the sliding block (62) is provided with an avoidance groove (63). The end of the sliding block (62) away from the connecting strip (61) is fixedly connected to a telescopic rod (64), and a compression spring (65) is sleeved on the outer wall of the telescopic rod (64).

2. The combined pole-mounted vacuum circuit breaker according to claim 1, characterized in that: The outer wall of the rotating frame (42) is slidably connected to the side wall of the mechanism box (1) through the sliding groove (5), and the sliding groove (5) is opened in the wall of the rotating frame (42). The outer wall of the positioning frame (41) is fixedly connected to the outer wall of the mechanism box (1).

3. A combined pole-mounted vacuum circuit breaker according to claim 1, characterized in that: The outer wall of the insertion shaft (462) and the outer wall of the connecting plate (461) are fixedly connected to the outer wall of the current transformer (3), the outer wall of the fixing frame (463) is slidably connected to the outer wall of the switch (45), and the outer wall of the limiting rod (466) is rotatably connected to the outer wall of the switch (45).

4. A combined pole-mounted vacuum circuit breaker according to claim 1, characterized in that: One end of the compression spring (465) is fixedly connected to the inner wall of the fixing frame (463), and the other end of the compression spring (465) is fixedly connected to the outer wall of the limiting rod (466).

5. A combined pole-mounted vacuum circuit breaker according to claim 1, characterized in that: The outer wall of the sliding block (62) is slidably connected to the inner wall of the mechanism box (1), one end of the compression spring (65) is fixedly connected to the inner wall of the mechanism box (1), and the other end of the compression spring (65) is fixedly connected to the outer wall of the sliding block (62).

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