An insulation support for an arc extinguishing chamber of a universal circuit breaker

Abstract

The application relates to the technical field of arc-extinguishing chamber mounting supports, and discloses a universal circuit breaker arc-extinguishing chamber insulation support which comprises an arc-extinguishing chamber, the arc-extinguishing chamber comprises a ceramic cylinder, two rod pieces are oppositely arranged in the ceramic cylinder, and the two rod pieces are respectively a static contact rod arranged at the upper portion and a moving contact rod arranged at the lower portion; the tail ends of the static contact rod and the moving contact rod penetrate through the corresponding end faces of the ceramic cylinder; two groups of support assembly are arranged on the arc-extinguishing chamber; each group of support assembly comprises a support frame which is movably connected to one end of the ceramic cylinder. Through the sliding cooperation structure of the horizontally movable positioning clamping plate, the convex strip and the stable notch, and the self-adapting pre-tightening force provided by the compression spring in the push rod mechanism, the positioning clamping plate can automatically adjust the clamping spacing according to the diameter of the end portion of the ceramic cylinder, ceramic breakage caused by rigid clamping is avoided, stable fixation in long-term use is ensured, the positioning bolt can be finally locked after clamping in place, and the double fixation structure significantly improves the anti-vibration and anti-impact capability.

Description

Technical Field

[0001] This invention relates to the field of arc-extinguishing chamber mounting bracket technology, specifically to a universal circuit breaker arc-extinguishing chamber insulation bracket. Background Technology

[0002] In universal circuit breakers, the arc-extinguishing chamber is a key component that supports the contact system and extinguishes the electric arc. To ensure safety, the arc-extinguishing chamber typically requires an insulating support frame for fixation and support.

[0003] In the existing technology, the insulation support structure of the arc-extinguishing chamber is relatively simple. The arc-extinguishing chamber is generally installed in the circuit breaker housing by rigid clamping or direct bolt fixing. However, because the arc-extinguishing chamber (especially ceramic material) is prone to stress concentration during installation or thermal expansion, the rigid fixing method is prone to arc-extinguishing chamber cracking or clamping loosening, affecting breaking performance and insulation reliability. In addition, traditional supports cannot adaptively adjust the clamping force, have poor adaptability to the ends of arc-extinguishing chambers with different diameter tolerances, and the installation process is cumbersome.

[0004] On the other hand, the opening and closing status indication of existing circuit breakers usually relies on auxiliary contacts and electrical signals, lacking a mechanical structure that directly obtains mechanical linkage status feedback from the movement of the driven contact rod. When the circuit breaker malfunctions or fails to open, operators cannot quickly determine the contact separation status through intuitive mechanical indications, which poses a safety hazard.

[0005] Therefore, there is an urgent need for an arc-extinguishing chamber insulation bracket that can achieve adaptive and stable clamping and provide intuitive mechanical indication of the opening and closing status. Summary of the Invention

[0006] To achieve the above objectives, the present invention provides the following technical solution: an insulating support for the arc-extinguishing chamber of a universal circuit breaker, comprising an arc-extinguishing chamber, the arc-extinguishing chamber comprising a ceramic cylinder, and two rods installed opposite to each other inside the ceramic cylinder, namely: a stationary contact rod located above and a moving contact rod located below, the tail ends of the stationary contact rod and the moving contact rod penetrating the corresponding end faces of the ceramic cylinder.

[0007] Two sets of support assemblies are installed on the arc extinguishing chamber. Each set of support assemblies includes a support frame movably connected to one end of the ceramic cylinder. Two positioning clamps that can move relative to or in opposite directions are movably connected inside the support frame. A push rod mechanism for providing adaptive preload is installed between the back of each positioning clamp and the corresponding end face of the inner side of the support frame.

[0008] A transmission assembly is installed on the side of the moving contact rod to transmit the downward force of the moving contact rod when it opens as kinetic energy.

[0009] A warning component is installed on one of the positioning clamps in the support assembly located below the arc-extinguishing chamber. The component is flipped by the transmitted kinetic energy to provide a warning of opening and closing.

[0010] Preferably, two protruding strips are symmetrically arranged on both sides of the bracket frame along its length.

[0011] Both ends of the positioning clamp are provided with stabilizing recesses, which are slidably fitted onto the side of the protrusion.

[0012] Preferably, the positioning clamp is provided with two positioning bolts connected by threads, and the front end of the positioning bolts abuts against the outer wall of the corresponding end of the ceramic cylinder.

[0013] Preferably, the push rod mechanism includes four stabilizing sleeves 1 distributed and fixed at both ends of the inner side of the support frame, and two stabilizing sleeves 2 distributed and fixed on the back of each positioning clamp, with a set rod movably sleeved between the corresponding stabilizing sleeves 1 and stabilizing sleeves 2.

[0014] Preferably, a tension spring is fixed between the ports of the first and second stabilizing sleeves.

[0015] Preferably, the transmission assembly includes a sleeve ring fixed to the side of the moving contact rod, and a retaining bolt is threadedly connected to one side of the sleeve ring, with the front end of the retaining bolt tightly abutting against the corresponding position on the side of the moving contact rod.

[0016] Preferably, the transmission assembly further includes a support plate fixed to the side of the sleeve ring, and a rack plate fixed to the back of the support plate.

[0017] Preferably, the warning component includes a guide frame fixed to the back of the corresponding positioning clamp, and a transmission groove is provided on the back of the guide frame along its length.

[0018] The warning assembly also includes a movable seat that is slidably fitted inside the guide frame. An installation port is provided in the middle of the movable seat, and a transmission gear is rotatably connected inside the installation port. The transmission gear is movably connected inside the transmission groove and meshes with the rack plate.

[0019] Preferably, a support arm is fixed to one end of the movable base, and a gear plate is rotatably connected to the front end of the support arm. The gear plate meshes with a transmission gear, and multiple indicator lights are fixedly distributed on the side of the gear plate.

[0020] Preferably, multiple relatively aligned positioning holes are provided on both sides of the guide frame along its length.

[0021] Both sides of the movable base are equipped with spring latches, and the front end of the spring latches is inserted into the corresponding positioning hole.

[0022] Compared with the prior art, the present invention provides a universal circuit breaker arc-extinguishing chamber insulation support, which has the following beneficial effects: 1. The universal circuit breaker arc-extinguishing chamber insulation support, through the setting of a horizontally movable positioning clamp, a sliding fit structure of convex strips and stable recesses, and the adaptive preload provided by the compression spring in the push rod mechanism, enables the positioning clamp to automatically adjust the clamping distance according to the diameter of the ceramic cylinder end. This avoids ceramic breakage caused by rigid clamping and ensures stable fixation during long-term use. At the same time, the positioning bolts can be finally locked after clamping. The double fixing structure significantly improves the vibration and impact resistance.

[0023] 2. The insulating support of the arc-extinguishing chamber of this universal circuit breaker uses the downward movement of the moving contact rod when it is opened. Through the meshing of the sleeve ring, support plate, rack plate and transmission gear and gear plate, it drives the radially distributed display lights to switch. It can realize the pure mechanical indication of the opening and closing status and fault status without the need for additional electrical sensors. It has high structural reliability, strong anti-electromagnetic interference ability, and makes it easy for on-site operators to quickly judge the actual status of the circuit breaker visually.

[0024] 3. The universal circuit breaker's arc-extinguishing chamber insulation support features an indicator light that switches to orange when the moving contact rod is not fully disconnected to its lowest position. This clearly indicates abnormal or faulty opening and closing conditions, effectively preventing misjudgments caused by contact adhesion or mechanism jamming, and improving the safety of circuit breaker inspection and maintenance.

[0025] 4. The universal circuit breaker arc-extinguishing chamber insulation support can be adjusted in multiple positions by means of the height of the movable seat in the warning component through the spring latch and positioning hole, so as to adapt to the application requirements of different specifications of circuit breakers or different moving contact rod strokes. Furthermore, the guide frame, gear rack and other transmission components are integrated on the side of the lower support component, which does not occupy the internal space of the arc-extinguishing chamber. The overall structure is compact and easy to directly modify or install in the existing circuit breaker housing. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of the device of the present invention; Figure 2 This is a schematic diagram of the overall structure of the arc-extinguishing chamber of the present invention; Figure 3 This is a schematic diagram of the overall structure of the support assembly of the present invention; Figure 4 This is a schematic diagram of the connection structure between the bracket assembly, the transmission assembly, and the warning assembly of the present invention; Figure 5 This is a schematic diagram of a partial connection structure between the bracket assembly, the transmission assembly, and the warning assembly of the present invention; Figure 6 This is a schematic diagram of the connection structure between the transmission component and the warning component of the present invention.

[0027] The attached diagram lists the components represented by each number as follows: 1. Arc-extinguishing chamber; 11. Ceramic cylinder; 12. Stationary contact rod; 13. Moving contact rod; 2. Bracket assembly; 21. Bracket frame; 211. Protruding strip; 22. Positioning clamp; 221. Stabilizing notch; 222. Positioning bolt; 23. Push rod mechanism; 231. Stabilizing sleeve one; 232. Stabilizing sleeve two; 233. Mounting rod; 234. Tension spring; 3. Transmission assembly; 31. Fitting ring; 311. Retaining bolt; 32. Support plate; 321. Rack plate; 4. Warning components; 41. Guide frame; 411. Transmission groove; 412. Positioning hole; 42. Movable seat; 421. Mounting port; 422. Transmission gear; 423. Support arm; 424. Gear plate; 425. Indicator light; 426. Spring latch. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example 1

[0029] Please see Figure 1 - Figure 6 As shown in the figure, the universal circuit breaker arc-extinguishing chamber insulation support proposed in this embodiment includes an arc-extinguishing chamber 1. The arc-extinguishing chamber 1 includes a cylindrical ceramic cylinder 11 made of ceramic material with a corrugated outer surface. In the internal cavity of the ceramic cylinder 11, two conductive rods are installed opposite each other along the axial direction: a stationary contact rod 12 located above and a moving contact rod 13 located below. The front ends of the stationary contact rod 12 and the moving contact rod 13 are equipped with contacts, which are opposite each other inside the ceramic cylinder 11 and are used to connect or disconnect the circuit. The tail ends of the two rods pass through the upper end face and the lower end face of the ceramic cylinder 11, respectively, so as to connect with the external circuit.

[0030] A set of bracket assemblies 2 are installed at both the upper and lower ends of the arc-extinguishing chamber 1 to fix the arc-extinguishing chamber 1 inside the circuit breaker housing. Each set of bracket assemblies 2 includes a rectangular bracket frame 21 with arc-shaped ends, which can stably fit against the inner wall of the circuit breaker housing. Inside each bracket frame 21, two semi-circular positioning clamps 22 are movably connected. The two positioning clamps 22 can make relative or opposite translational movements in the horizontal direction within the bracket frame 21, thereby changing the distance between them to adapt to the end diameter of the ceramic cylinder 11.

[0031] To achieve smooth movement, two protrusions 211 are symmetrically arranged on both sides of the support frame 21 along its length. Each positioning clamp 22 has a stabilizing notch 221 at both ends. The stabilizing notch 221 is slidably fitted onto the side of the protrusion 211, thereby ensuring the stability of movement while preventing the positioning clamp 22 from detaching from the support frame 21.

[0032] Two sets of push rod mechanisms 23 are installed between the back side (i.e. the side away from the ceramic cylinder 11) of each positioning clamp 22 and the corresponding end face of the inner side of the bracket frame 21. The push rod mechanism 23 is used to provide an adaptive preload force to push the positioning clamp 22 toward the ceramic cylinder 11. Specifically, the push rod mechanism 23 includes four first stabilizing sleeves 231 fixed at both ends of the inner side of the bracket frame 21, and two second stabilizing sleeves 232 fixed on the back side of each positioning clamp 22 (two are fixed on the back side of each positioning clamp 22, for a total of four). A sleeve rod 233 is movably sleeved between each set of corresponding first stabilizing sleeves 231 and second stabilizing sleeves 232. A tension spring 234 is fixed between the ends of the first stabilizing sleeves 231 and second stabilizing sleeves 232. The spring is always in a compressed state, pushing the positioning clamp 22 to move toward the ceramic cylinder 11, thereby adaptively clamping the end of the ceramic cylinder 11.

[0033] To further secure the device, each positioning clamp 22 is also threaded with two positioning bolts 222. Once the positioning clamp 22 is in place, tighten the positioning bolts 222 so that their front ends press against the outer wall of the ceramic cylinder 11 to achieve final locking.

[0034] A transmission assembly 3 is installed on the side of the moving contact rod 13 to convert the downward movement force of the moving contact rod 13 when it is opened into the kinetic energy to drive the terminal assembly (the warning assembly 4 below). The transmission assembly 3 includes a sleeve ring 31 fitted on the moving contact rod 13. A retaining bolt 311 is threaded to one side of the sleeve ring 31. The front end of the retaining bolt 311 passes through the side wall of the sleeve ring 31 and is tightly attached to the rod body of the moving contact rod 13, thereby fixing the sleeve ring 31 at a predetermined height position of the moving contact rod 13.

[0035] A strip-shaped support plate 32 is vertically fixed downward on the side of the sleeve ring 31 (the side away from the moving contact rod 13), and a rack plate 321 is fixed along its length on the back of the support plate 32 (the side facing away from the moving contact rod 13).

[0036] A warning component 4 is installed on one of the positioning clamps 22 of the set of support assemblies 2 located below the arc extinguishing chamber 1. The warning component 4 includes a long strip guide frame 41 with a U-shaped cross section. The guide frame 41 is vertically fixed to the outer wall of the positioning clamp 22. A through transmission groove 411 is opened on the side of the guide frame 41 facing the rack plate 321 along its length direction. A movable seat 42 is slidably fitted inside the guide frame 41. The movable seat 42 can move along the length direction of the guide frame 41.

[0037] To facilitate adjustment and fixation, multiple aligned positioning holes 412 are provided on both sides of the guide frame 41 along the length direction. Spring latches 426 are provided on both sides of the movable seat 42. The front end of the spring latch 426 can be inserted into the corresponding positioning hole 412. By pressing the front end of the spring latch 426 to disengage it from the positioning hole 412, the movable seat 42 can be moved to an appropriate height. Then, under the push of the spring at the rear of the spring latch 426, the front end of the latch is inserted into the corresponding positioning hole 412 to fix the current height position of the movable seat 42.

[0038] A mounting port 421 is provided in the middle of the movable base 42. A transmission gear 422 is rotatably connected in the mounting port 421 via a rotating shaft. A part of the transmission gear 422 protrudes from the transmission groove 411 and meshes with the rack plate 321. At the same time, a support arm 423 is fixed at the bottom end of the movable base 42 away from the moving contact rod 13. A gear plate 424 is rotatably connected to the front end of the support arm 423 via a rotating shaft. The gear plate 424 meshes with the transmission gear 422. Multiple indicator lights 425 are fixed radially distributed on the side (e.g., on the circumferential surface) of the gear plate 424 (which can be replaced with different colors of corrosion-resistant and waterproof paint or partitioned panels with luminous materials). The indicator lights 425 can use high-contrast colors and are divided into three colors: red for opening, green for closing, and orange for fault. Orange is between red and green.

[0039] The working principle of the universal circuit breaker arc-extinguishing chamber insulation support proposed in this embodiment is as follows: When the circuit breaker is in the closed state, the stationary contact rod 12 located above the arc-extinguishing chamber 1 and the moving contact rod 13 located below are in close contact inside the ceramic cylinder 11, and the circuit is in a conductive state. At this time, the moving contact rod 13 is located at the high position of the closed position, and the sleeve ring 31 fitted on the moving contact rod 13 is also in a high position. The support plate 32 and the rack plate 321 on the side of the sleeve ring 31 are also located at the upper stop position. The indicator light 425 on the rack plate 424 is green at this time, which represents the closed indication state, thereby prompting the operator that the current circuit is in a closed conductive state.

[0040] When the circuit breaker performs a tripping operation or automatically trips in case of a fault, the moving contact rod 13 moves downward along the axial direction of the ceramic cylinder 11 under the drive of the operating mechanism, separating from the stationary contact rod 12, and the circuit is cut off. During the downward movement of the moving contact rod 13, the sleeve ring 31 fixed on its side moves downward synchronously, causing the sleeve ring 31 to drive the support plate 32 and the rack plate 321 to move downward together. The linear downward movement of the rack plate 321 generates relative movement with the transmission gear 422 meshing with it, driving the transmission gear 422 to rotate in the mounting port 421. The rotational torque of the transmission gear 422 is further transmitted to the gear disk 424 meshing with it, driving the gear disk 424 to rotate synchronously. The multiple indicator lights 425 distributed radially on the gear disk 424 switch positions accordingly. After the tripping is completed, the indicator lights 425 switch to red, which represents the tripping indication status, thus clearly indicating that the circuit breaker is currently in the tripping state.

[0041] When the circuit breaker is in the open position or the automatic fault disconnection is not completely completed, i.e. when the moving contact rod 13 has not completely moved down from the high position of closing to the lowest position of opening, the light will switch to orange between green and red due to the distance of the movement of the moving contact rod 13. This indicates an abnormal opening and closing status, thus clearly indicating that the circuit breaker is in a fault state.

[0042] Although embodiments of the 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 invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An insulating support for the arc-extinguishing chamber of a universal circuit breaker, characterized in that, It includes an arc-extinguishing chamber (1), which includes a ceramic cylinder (11). Two rods are installed opposite each other inside the ceramic cylinder (11): a stationary contact rod (12) located above and a moving contact rod (13) located below. The tail ends of the stationary contact rod (12) and the moving contact rod (13) penetrate the corresponding end faces of the ceramic cylinder (11). Two sets of support assemblies (2) are installed on the arc-extinguishing chamber (1). Each set of support assemblies (2) includes a support frame (21) movably connected to one end of a ceramic cylinder (11). Two positioning clamps (22) that can move relative to or in opposite directions are movably connected inside the support frame (21). A push rod mechanism (23) for providing adaptive preload is installed between the back of each positioning clamp (22) and the corresponding end face of the inner side of the support frame (21). The moving contact rod (13) is equipped with a transmission assembly (3) on its side, which is used to transmit the downward motion force of the moving contact rod (13) when it opens as kinetic energy. A warning component (4) is installed on one of the positioning clamps (22) of the support assembly (2) located below the arc extinguishing chamber (1), which is controlled to flip by the transmitted kinetic energy to provide a warning of opening and closing.

2. The insulating support for the arc-extinguishing chamber of a universal circuit breaker according to claim 1, characterized in that: Two protruding strips (211) are symmetrically arranged on both sides of the bracket frame (21) along its length direction. Both ends of the positioning clamp (22) are provided with a stabilizing notch (221), and the stabilizing notch (221) is slidably sleeved on the side of the protrusion (211).

3. The insulating support for the arc-extinguishing chamber of a universal circuit breaker according to claim 2, characterized in that: The positioning clamp (22) is threaded with two positioning bolts (222), the front end of which abuts against the outer wall of the corresponding end of the ceramic cylinder (11).

4. The insulating support for the arc-extinguishing chamber of a universal circuit breaker according to claim 2, characterized in that: The push rod mechanism (23) includes four stabilizing sleeves (231) distributed and fixed at both ends of the inner side of the bracket frame (21), and two stabilizing sleeves (232) distributed and fixed on the back of each positioning clamp (22). A set rod (233) is movably sleeved between the corresponding stabilizing sleeves (231) and stabilizing sleeves (232).

5. The insulating support for the arc-extinguishing chamber of a universal circuit breaker according to claim 4, characterized in that: A tension spring (234) is fixed between the ports of the first stabilizing sleeve (231) and the second stabilizing sleeve (232).

6. The insulating support for the arc-extinguishing chamber of a universal circuit breaker according to claim 1, characterized in that: The transmission assembly (3) includes a sleeve ring (31) fixed to the side of the moving contact rod (13), and a retaining bolt (311) is threadedly connected to one side of the sleeve ring (31), with the front end of the retaining bolt (311) closely attached to the corresponding position on the side of the moving contact rod (13).

7. The insulating support for the arc-extinguishing chamber of a universal circuit breaker according to claim 6, characterized in that: The transmission assembly (3) also includes a support plate (32) fixed to the side of the sleeve ring (31), and a rack plate (321) is fixed to the back of the support plate (32).

8. The insulating support for the arc-extinguishing chamber of a universal circuit breaker according to claim 7, characterized in that: The warning component (4) includes a guide frame (41) fixed to the back of the corresponding positioning clamp (22), and a transmission groove (411) is provided on the back of the guide frame (41) along its length. The warning component (4) also includes a movable seat (42) that is slidably fitted in the guide frame (41). An installation port (421) is provided in the middle of the movable seat (42). A transmission gear (422) is rotatably connected in the installation port (421). The transmission gear (422) is movably connected in the transmission groove (411) and meshes with the rack plate (321).

9. The insulating support for the arc-extinguishing chamber of a universal circuit breaker according to claim 8, characterized in that: One end of the movable seat (42) is fixed with a support arm (423), and a gear plate (424) is rotatably connected to the front end of the support arm (423). The gear plate (424) meshes with the transmission gear (422), and multiple indicator lights (425) are fixedly distributed on the side of the gear plate (424).

10. The insulating support for the arc-extinguishing chamber of a universal circuit breaker according to claim 9, characterized in that: On both sides of the guide frame (41), a plurality of relatively aligned positioning holes (412) are distributed along its length. Both sides of the movable base (42) are provided with spring latches (426), and the front end of the spring latches (426) is inserted into the corresponding positioning hole (412).

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